阅读说明：本技术 一种导电型复合介质微粒电阻率检测装置与检测方法 (Conductive composite medium particle resistivity detection device and detection method ) 是由 袁驰 陈芳林 崔洪刚 姜志鹏 安韵竹 刘春梅 方敏 李锦晓 严丹 王炜 尹宓 于 2021-08-27 设计创作，主要内容包括：本发明属电力技术领域,尤其是涉及一种导电型复合介质微粒电阻率检测装置,其结构包含微粒静压成型装置和电参数测量箱两部分,其中,前者功能是实现样品压模成型,后者用于测量复合介质的电阻率；其特征在于所述微粒静压成型装置由转臂(1)、中轴(2)、悬梁(3)、螺纹轴承(4)、固定轴承(5)、压板(6)、支柱(7)、底座(8)和电参数测量箱(9)组成。本申请还公开了检测方法。本发明具有以下主要有益效果：结构简单、组装和拆卸灵活、操作测试过程便捷,测量准确率高,能够有效避免测量误差；适用面广。(The invention belongs to the technical field of electric power, and particularly relates to a conductive composite medium particle resistivity detection device, which structurally comprises a particle static pressure forming device and an electric parameter measuring box, wherein the particle static pressure forming device has the function of realizing the compression molding of a sample, and the electric parameter measuring box is used for measuring the resistivity of a composite medium; the particle static pressure forming device is characterized by comprising a rotating arm (1), a middle shaft (2), a suspension beam (3), a threaded bearing (4), a fixed bearing (5), a pressing plate (6), a support column (7), a base (8) and an electrical parameter measuring box (9). The application also discloses a detection method. The invention has the following main beneficial effects: the structure is simple, the assembly and disassembly are flexible, the operation and test process is convenient, the measurement accuracy is high, and the measurement error can be effectively avoided; has wide application range.)

1. A conductive composite medium particle resistivity detection device structurally comprises a particle static pressure forming device and an electrical parameter measuring box, wherein the former has the function of realizing sample compression molding, and the latter is used for measuring the resistivity of a composite medium; it is characterized in that the particle static pressure forming device consists of a rotating arm (1), a middle shaft (2), a suspension beam (3), a threaded bearing (4), a fixed bearing (5), a pressing plate (6), a support post (7), a base (8) and an electric parameter measuring box (9),

the rotating arm (1) is composed of a rotating arm joint (11), a pair of rotating arm rods (12) which are bilaterally symmetrical and two rotating arm ball heads (13), a through round hole (111) is formed in the middle of the rotating arm joint (11), a square through groove (112) is formed in the through round hole (111) and perpendicular to the central axis of the rotating arm rods, a through hole (113) is formed outside the square through groove (112), and the through hole (113) is communicated with the square through groove (112); the rotating arm rod (12) consists of a rotating arm rod body (121) and a rotating arm rod body extension rod (122) which is positioned at the outer sides of the two ends of the rotating arm rod body (121) and is connected with the rotating arm rod body (121) into a whole; the tumbler ball head (13) is provided with a tumbler outer hole (131) and a tumbler inner hole (132) axially extending from the tumbler outer hole (131) to the tumbler ball head (13), the tumbler outer hole (131) is communicated with the tumbler inner hole (132) and the axes of the tumbler outer hole and the tumbler inner hole are coincident, the diameter of the tumbler outer hole (131) is larger than that of the tumbler inner hole (132), a tumbler rod body extension rod (122) at one end of each tumbler rod (12) extends into the through round hole (111), and a tumbler rod body extension rod (122) at the other end of each tumbler rod (12) extends into the tumbler inner hole (132) and the tumbler outer hole (131) of one tumbler ball head (13);

the middle shaft (2) comprises a threaded rod (23), a top rod (22) extending outwards from one end of the threaded rod (23), a bottom rod (24) extending outwards from the other end of the threaded rod (23), an omega-shaped gasket (21) and a runway-shaped pin (25), wherein the outer diameter of the threaded rod (23) is larger than that of the top rod (22), the outer diameter of the threaded rod (23) is larger than that of the bottom rod (24), one end, close to the threaded rod (23), of the top rod (22) is provided with an annular groove (222), an annular groove (221) is formed between the annular groove (222) and one end, far away from the threaded rod (23), of the top rod (22), the omega-shaped gasket (21) is embedded into the annular groove (221), the runway-shaped pin (25) is embedded into the annular groove (222), the bottom rod (24) is provided with an annular circular groove (241), the diameter of the top rod (22) is smaller than that of the threaded rod (23), and the outer diameter of the omega-shaped gasket (21) is larger than that of the top rod (22), the bottom rod (24) is in a gourd shape, and the maximum diameter of the bottom rod (24) is consistent with the outer diameter of the threaded rod (23);

the suspension beam (3) is provided with a suspension beam body, the center of the suspension beam body is provided with a through hole (32) which is penetrated through up and down, the near two ends of the suspension beam body are provided with bolt through holes (31) which are penetrated through up and down, and the outer side of the through hole (32) is provided with two side threaded holes (33) which extend from the lower surface to the upper surface;

the threaded bearing (4) is T-shaped in appearance, the threaded bearing (4) is composed of a protruding cylinder (41) and a bearing base located below the protruding cylinder (41), threads are arranged inside the protruding cylinder (41), through holes (42) penetrating up and down are formed in the bearing base on two sides of the protruding cylinder (41), and the through holes (42) are used for placing countersunk bolts (43);

the fixed bearing (5) is composed of an upper-layer circular plate (52), a lower-layer circular plate (53) and a cylindrical pin (55), the axis of the upper-layer circular plate (52) is overlapped with that of the lower-layer circular plate (53), the outer diameter of the upper-layer circular plate (52) is smaller than that of the lower-layer circular plate (53), a circular plate center hole (51) penetrating from the upper surface of the upper-layer circular plate (52) to the lower surface of the lower-layer circular plate (53) is formed in the center of the fixed bearing (5), the upper-layer circular plate (52) is provided with two symmetrical upper-layer circular plate holes (54) perpendicular to the radial direction of the circular plate, the lower-layer circular plate (53) is provided with a plurality of lower-layer circular plate holes (56), and the lower-layer circular plate holes (56) are located outside the upper-layer circular plate (52);

the pressing plate (6) is composed of a pressing plate body, and arc-shaped notches (61) are formed in two sides of the pressing plate body;

the support (7) is composed of a countersunk hexagonal bolt (71) and a cylinder (72), the countersunk hexagonal bolt (71) is composed of a bolt body (711) and a bolt head (712) which are connected into a whole, the diameter of the bolt body (711) is smaller than that of the bolt head (712), the bolt body (711) is externally provided with threads, and the top of the bolt head (712) is provided with a rotating hole (713); the cylinder (72) is provided with a cylinder body (721), and the inside of the cylinder body (721) is provided with a cylinder hole (722) which penetrates in the axial direction; the cylinder (72) is sleeved outside the countersunk hexagon bolt (71);

the base (8) is composed of a base body, and base threaded holes (81) which are vertically communicated are formed in two sides of the base body;

the electric parameter measuring box (9) is composed of a box body (91) and four polar plates (92), the box body (91) is of a cuboid structure with an open top, four pairs of square grooves (911) are formed in a pair of long side surfaces of the box body (91), a hanging groove (912) is formed in the long side surface of the box body (91) above the square grooves (911), the hanging groove (912) is not communicated with a bottom plate of the box body (91), and the square grooves (911) are communicated with the upper surface of the bottom plate of the box body (91); the pole plate (92) is composed of a pole plate body (922) and a hanging plate (923) which is positioned above the pole plate body and is connected with the pole plate body into a whole, the length of the hanging plate (923) is greater than that of the pole plate body (922), and the two ends of the hanging plate (923) are provided with through wiring holes (921); the pole plate body (922) is placed in the square groove (911), the hanging plate (923) is placed in the hanging groove (912), and the wiring hole (921) is located on the outer side of the box body (91);

the runway-shaped pin (25) is used for fixing the rotating arm (1) and the middle shaft (2) in the horizontal direction; the omega-shaped gasket (21) is used for fixing the top end of the middle shaft above the swivel arm joint so as to fix the swivel arm (1) and the middle shaft (2) in the vertical direction; the threaded rod (23) is in threaded connection with a threaded bearing connected to the center of the suspension beam, so that the threaded rod is guaranteed to move in the vertical direction; the cylindrical pin bottom rod is placed in the annular circular groove (241) and is firmly connected with the fixed bearing below, so that the fixed bearing is prevented from rotating when the middle shaft rotates, and the pressing plate is ensured to be stable in the horizontal direction; the bolt through holes (31) at the two ends of the suspension beam are used for connecting the support columns, the through hole (32) in the center of the suspension beam is used for placing a threaded bearing, and the suspension beam is connected with the threaded bearing through a countersunk head bolt; countersunk bolts (43) are placed in through holes (42) on two sides of the threaded bearing, and the threaded bearing is fixed on the suspension beam; the cylindrical pin (55) is nested in the annular circular groove of the bottom rod of the middle shaft; the lower round plate hole (56) is used for placing a countersunk bolt and is connected to the pressure plate; the threaded holes (81) on the two sides of the base are used for placing countersunk hexagon bolts on the inner layer of the strut; the electrical parameter measurement box is placed on the base.

2. A conductive composite medium particle resistivity detection device structurally comprises a particle static pressure forming device and an electrical parameter measuring box, wherein the former has the function of realizing sample compression molding, and the latter is used for measuring the resistivity of a composite medium; it is characterized in that the particle static pressure forming device consists of a rotating arm (1), a middle shaft (2), a suspension beam (3), a threaded bearing (4), a fixed bearing (5), a pressing plate (6), a support post (7), a base (8) and an electric parameter measuring box (9),

the rotating arm (1) is composed of a rotating arm joint (11), a pair of rotating arm rods (12) which are bilaterally symmetrical and two rotating arm ball heads (13), a through round hole (111) is formed in the middle of the rotating arm joint (11), a square through groove (112) is formed in the through round hole (111) and perpendicular to the central axis of the rotating arm rods, a through hole (113) is formed outside the square through groove (112), and the through hole (113) is communicated with the square through groove (112); the rotating arm rod (12) consists of a rotating arm rod body (121) and a rotating arm rod body extension rod (122) which is positioned at the outer sides of the two ends of the rotating arm rod body (121) and is connected with the rotating arm rod body (121) into a whole; the tumbler ball head (13) is provided with a tumbler outer hole (131) and a tumbler inner hole (132) axially extending from the tumbler outer hole (131) to the tumbler ball head (13), the tumbler outer hole (131) is communicated with the tumbler inner hole (132) and the axes of the tumbler outer hole and the tumbler inner hole are coincident, the diameter of the tumbler outer hole (131) is larger than that of the tumbler inner hole (132), a tumbler rod body extension rod (122) at one end of each tumbler rod (12) extends into the through round hole (111), and a tumbler rod body extension rod (122) at the other end of each tumbler rod (12) extends into the tumbler inner hole (132) and the tumbler outer hole (131) of one tumbler ball head (13);

the middle shaft (2) comprises a threaded rod (23), a top rod (22) extending outwards from one end of the threaded rod (23), a bottom rod (24) extending outwards from the other end of the threaded rod (23), an omega-shaped gasket (21) and a runway-shaped pin (25), wherein the outer diameter of the threaded rod (23) is larger than that of the top rod (22), the outer diameter of the threaded rod (23) is larger than that of the bottom rod (24), one end, close to the threaded rod (23), of the top rod (22) is provided with an annular groove (222), an annular groove (221) is formed between the annular groove (222) and one end, far away from the threaded rod (23), of the top rod (22), the omega-shaped gasket (21) is embedded into the annular groove (221), the runway-shaped pin (25) is embedded into the annular groove (222), the bottom rod (24) is provided with an annular circular groove (241), the diameter of the top rod (22) is smaller than that of the threaded rod (23), and the outer diameter of the omega-shaped gasket (21) is larger than that of the top rod (22), the bottom rod (24) is in a gourd shape, and the maximum diameter of the bottom rod (24) is consistent with the outer diameter of the threaded rod (23);

the suspension beam (3) is provided with a suspension beam body, the center of the suspension beam body is provided with a through hole (32) which is penetrated through up and down, the near two ends of the suspension beam body are provided with bolt through holes (31) which are penetrated through up and down, and the outer side of the through hole (32) is provided with two side threaded holes (33) which extend from the lower surface to the upper surface;

the threaded bearing (4) is T-shaped in appearance, the threaded bearing (4) is composed of a protruding cylinder (41) and a bearing base located below the protruding cylinder (41), threads are arranged inside the protruding cylinder (41), through holes (42) penetrating up and down are formed in the bearing base on two sides of the protruding cylinder (41), and the through holes (42) are used for placing countersunk bolts (43);

the fixed bearing (5) is composed of an upper-layer circular plate (52), a lower-layer circular plate (53) and a cylindrical pin (55), the axis of the upper-layer circular plate (52) is overlapped with that of the lower-layer circular plate (53), the outer diameter of the upper-layer circular plate (52) is smaller than that of the lower-layer circular plate (53), a circular plate center hole (51) penetrating from the upper surface of the upper-layer circular plate (52) to the lower surface of the lower-layer circular plate (53) is formed in the center of the fixed bearing (5), the upper-layer circular plate (52) is provided with two symmetrical upper-layer circular plate holes (54) perpendicular to the radial direction of the circular plate, the lower-layer circular plate (53) is provided with a plurality of lower-layer circular plate holes (56), and the lower-layer circular plate holes (56) are located outside the upper-layer circular plate (52);

the pressing plate (6) is composed of a pressing plate body, and arc-shaped notches (61) are formed in two sides of the pressing plate body;

the support (7) is composed of a countersunk hexagonal bolt (71) and a cylinder (72), the countersunk hexagonal bolt (71) is composed of a bolt body (711), a bolt head (712), a connecting body (714) and a protruding body (715) which are connected into a whole, the diameter of the bolt body (711) is smaller than that of the bolt head (712), the bolt body (711) is externally provided with threads, the top of the bolt head (712) is provided with a rotating hole (713), the upper end of the bolt body (711) is connected with the connecting body (714), the upper end of the connecting body (714) is connected with the bolt head (712), the lower end of the bolt body (711) is connected with the protruding body (715), the diameter of the protruding body (715) is smaller than that of the bolt body (711), and the diameter of the connecting body (714) is smaller than that of the bolt body (711); the cylinder (72) is provided with a cylinder body (721), and the inside of the cylinder body (721) is provided with a cylinder hole (722) which penetrates in the axial direction; the cylinder (72) is sleeved outside the countersunk hexagon bolt (71);

the base (8) is composed of a base body, and base threaded holes (81) which are vertically communicated are formed in two sides of the base body;

the electric parameter measuring box (9) is composed of a box body (91) and four polar plates (92), the box body (91) is of a cuboid structure with an open top, four pairs of square grooves (911) are formed in a pair of long side surfaces of the box body (91), a hanging groove (912) is formed in the long side surface of the box body (91) above the square grooves (911), the hanging groove (912) is not communicated with a bottom plate of the box body (91), and the square grooves (911) are communicated with the upper surface of the bottom plate of the box body (91); the pole plate (92) is composed of a pole plate body (922) and a hanging plate (923) which is positioned above the pole plate body and is connected with the pole plate body into a whole, the length of the hanging plate (923) is greater than that of the pole plate body (922), and the two ends of the hanging plate (923) are provided with through wiring holes (921); the pole plate body (922) is placed in the square groove (911), the hanging plate (923) is placed in the hanging groove (912), and the wiring hole (921) is located on the outer side of the box body (91);

the runway-shaped pin (25) is used for fixing the rotating arm (1) and the middle shaft (2) in the horizontal direction; the omega-shaped gasket (21) is used for fixing the top end of the middle shaft above the swivel arm joint so as to fix the swivel arm (1) and the middle shaft (2) in the vertical direction; the threaded rod (23) is in threaded connection with a threaded bearing connected to the center of the suspension beam, so that the threaded rod is guaranteed to move in the vertical direction; the cylindrical pin bottom rod is placed in the annular circular groove (241) and is firmly connected with the fixed bearing below, so that the fixed bearing is prevented from rotating when the middle shaft rotates, and the pressing plate is ensured to be stable in the horizontal direction; the bolt through holes (31) at the two ends of the suspension beam are used for connecting the support columns, the through hole (32) in the center of the suspension beam is used for placing a threaded bearing, and the suspension beam is connected with the threaded bearing through a countersunk head bolt; countersunk bolts (43) are placed in through holes (42) on two sides of the threaded bearing, and the threaded bearing is fixed on the suspension beam; the cylindrical pin (55) is nested in the annular circular groove of the bottom rod of the middle shaft; the lower round plate hole (56) is used for placing a countersunk bolt and is connected to the pressure plate; the threaded holes (81) on the two sides of the base are used for placing countersunk hexagon bolts on the inner layer of the strut; the electrical parameter measurement box is placed on the base.

3. A conductive composite medium particle resistivity detection device structurally comprises a particle static pressure forming device and an electrical parameter measuring box, wherein the former has the function of realizing sample compression molding, and the latter is used for measuring the resistivity of a composite medium; it is characterized in that the particle static pressure forming device consists of a rotating arm (1), a middle shaft (2), a suspension beam (3), a threaded bearing (4), a fixed bearing (5), a pressing plate (6), a support post (7), a base (8) and an electric parameter measuring box (9),

the rotating arm (1) is composed of a rotating arm joint (11), a pair of rotating arm rods (12) which are bilaterally symmetrical and two rotating arm ball heads (13), a through round hole (111) is formed in the middle of the rotating arm joint (11), a square through groove (112) is formed in the through round hole (111) and perpendicular to the central axis of the rotating arm rods, a through hole (113) is formed outside the square through groove (112), and the through hole (113) is communicated with the square through groove (112); the rotating arm rod (12) consists of a rotating arm rod body (121) and a rotating arm rod body extension rod (122) which is positioned at the outer sides of the two ends of the rotating arm rod body (121) and is connected with the rotating arm rod body (121) into a whole; the tumbler ball head (13) is provided with a tumbler outer hole (131) and a tumbler inner hole (132) axially extending from the tumbler outer hole (131) to the tumbler ball head (13), the tumbler outer hole (131) is communicated with the tumbler inner hole (132) and the axes of the tumbler outer hole and the tumbler inner hole are coincident, the diameter of the tumbler outer hole (131) is larger than that of the tumbler inner hole (132), a tumbler rod body extension rod (122) at one end of each tumbler rod (12) extends into the through round hole (111), and a tumbler rod body extension rod (122) at the other end of each tumbler rod (12) extends into the tumbler inner hole (132) and the tumbler outer hole (131) of one tumbler ball head (13);

the middle shaft (2) comprises a threaded rod (23), a top rod (22) extending outwards from one end of the threaded rod (23), a bottom rod (24) extending outwards from the other end of the threaded rod (23), an omega-shaped gasket (21) and a runway-shaped pin (25), wherein the outer diameter of the threaded rod (23) is larger than that of the top rod (22), the outer diameter of the threaded rod (23) is larger than that of the bottom rod (24), one end, close to the threaded rod (23), of the top rod (22) is provided with an annular groove (222), an annular groove (221) is formed between the annular groove (222) and one end, far away from the threaded rod (23), of the top rod (22), the omega-shaped gasket (21) is embedded into the annular groove (221), the runway-shaped pin (25) is embedded into the annular groove (222), the bottom rod (24) is provided with an annular circular groove (241), the diameter of the top rod (22) is smaller than that of the threaded rod (23), and the outer diameter of the omega-shaped gasket (21) is larger than that of the top rod (22), the bottom rod (24) is in a gourd shape, and the maximum diameter of the bottom rod (24) is consistent with the outer diameter of the threaded rod (23);

the suspension beam (3) is provided with a suspension beam body, the center of the suspension beam body is provided with a through hole (32) which is penetrated through up and down, the near two ends of the suspension beam body are provided with bolt through holes (31) which are penetrated through up and down, and the outer side of the through hole (32) is provided with two side threaded holes (33) which extend from the lower surface to the upper surface;

the threaded bearing (4) is T-shaped in appearance, the threaded bearing (4) is composed of a protruding cylinder (41) and a bearing base located below the protruding cylinder (41), threads are arranged inside the protruding cylinder (41), through holes (42) penetrating up and down are formed in the bearing base on two sides of the protruding cylinder (41), and the through holes (42) are used for placing countersunk bolts (43);

the fixed bearing (5) is composed of an upper-layer circular plate (52), a lower-layer circular plate (53) and a cylindrical pin (55), the axis of the upper-layer circular plate (52) is overlapped with that of the lower-layer circular plate (53), the outer diameter of the upper-layer circular plate (52) is smaller than that of the lower-layer circular plate (53), a circular plate center hole (51) penetrating from the upper surface of the upper-layer circular plate (52) to the lower surface of the lower-layer circular plate (53) is formed in the center of the fixed bearing (5), the upper-layer circular plate (52) is provided with two symmetrical upper-layer circular plate holes (54) perpendicular to the radial direction of the circular plate, the lower-layer circular plate (53) is provided with a plurality of lower-layer circular plate holes (56), and the lower-layer circular plate holes (56) are located outside the upper-layer circular plate (52);

the pressing plate (6) is composed of a pressing plate body, and arc-shaped notches (61) are formed in two sides of the pressing plate body;

the support (7) is composed of a countersunk hexagonal bolt (71) and a cylinder (72), the countersunk hexagonal bolt (71) is composed of a bolt body (711) and a bolt head (712) which are connected into a whole, the diameter of the bolt body (711) is smaller than that of the bolt head (712), the bolt body (711) is externally provided with threads, and the top of the bolt head (712) is provided with a rotating hole (713); the cylinder (72) is provided with a cylinder body (721), and the inside of the cylinder body (721) is provided with a cylinder hole (722) which penetrates in the axial direction; the cylinder (72) is sleeved outside the countersunk hexagon bolt (71);

the base (8) is composed of a base body, and base threaded holes (81) which are vertically communicated are formed in two sides of the base body;

the electric parameter measuring box (9) is composed of a box body (91) and four polar plates (92), the box body (91) is of a cuboid structure with an open top, four pairs of square grooves (911) are formed in a pair of long side faces of the box body (91), a hanging groove (912) is formed in the middle position of the long side face of the box body (91) above the square groove (911), the hanging groove (912) is a long side face, and the square groove (911) penetrates through the upper surface of the bottom plate of the box body (91); the pole plate (92) is composed of a pole plate body (922) and hanging plates (923) which are positioned outside the two sides of the center of the length direction of the pole plate body and are connected with the pole plate body into a whole, and the two ends near the hanging plates (923) are provided with through wiring holes (921); the pole plate body (922) is placed in the square groove (911), the hanging plate (923) is placed in the hanging groove (912), and the wiring hole (921) is located on the outer side of the box body (91);

the runway-shaped pin (25) is used for fixing the rotating arm (1) and the middle shaft (2) in the horizontal direction; the omega-shaped gasket (21) is used for fixing the top end of the middle shaft above the swivel arm joint so as to fix the swivel arm (1) and the middle shaft (2) in the vertical direction; the threaded rod (23) is in threaded connection with a threaded bearing connected to the center of the suspension beam, so that the threaded rod is guaranteed to move in the vertical direction; the cylindrical pin bottom rod is placed in the annular circular groove (241) and is firmly connected with the fixed bearing below, so that the fixed bearing is prevented from rotating when the middle shaft rotates, and the pressing plate is ensured to be stable in the horizontal direction; the bolt through holes (31) at the two ends of the suspension beam are used for connecting the support columns, the through hole (32) in the center of the suspension beam is used for placing a threaded bearing, and the suspension beam is connected with the threaded bearing through a countersunk head bolt; countersunk bolts (43) are placed in through holes (42) on two sides of the threaded bearing, and the threaded bearing is fixed on the suspension beam; the cylindrical pin (55) is nested in the annular circular groove of the bottom rod of the middle shaft; the lower round plate hole (56) is used for placing a countersunk bolt and is connected to the pressure plate; the threaded holes (81) on the two sides of the base are used for placing countersunk hexagon bolts on the inner layer of the strut; the electrical parameter measurement box is placed on the base.

4. The apparatus for detecting the resistivity of conductive composite dielectric particles as claimed in claim 1, 2 or 3, wherein the connection between the knuckle and the ball of the swivel arm is a threaded connection or a welding connection.

5. The apparatus of claim 4, wherein the number of the through holes is 2-4.

6. The apparatus of claim 5, wherein the housing is made of nylon or epoxy board or acrylic or metal.

7. The device for detecting the resistivity of conductive composite dielectric particles as claimed in claim 6, wherein the surface of the box body is coated with an insulating varnish or an insulating layer when the box body is made of metal.

8. The apparatus of claim 7, wherein the plate is made of copper, steel, aluminum or alloy.

9. A method for detecting resistivity of conductive composite dielectric particles, characterized in that the conductive composite dielectric particles according to claim 1 or claim 2 or claim 3 or claim 5 or claim 6 or claim 7 or claim 8 are usedThe resistivity detection device comprises the following detection methods: firstly, according to the structure of a particle static pressure forming device, sequentially assembling a rotating arm, a middle shaft, a suspension beam, a threaded bearing, a fixed bearing, a pressing plate, a strut, a base and the like, wherein the proper height of the strut is selected according to the size of a sample to be measured and a measuring box; secondly, nesting the polar plate into a square groove on the side wall of the measuring box body, simultaneously filling any solid powder particles to be measured, and placing the box body between the base and the pressing plate after being filled; then, rotating a rotating arm of the particle static pressure forming device, sequentially driving a middle shaft, a fixed bearing and a pressing plate, flattening the particle sample to be detected in the box body, and increasing or reducing the total amount of the medium according to the state of particles in the box body; repeatedly adjusting the lifting height of the pressing plate until the particles in the box body are flat and can be fixed and molded; and finally, connecting the polar plate of the measuring box to an external circuit, obtaining the resistance value of the particle sample between the voltage polar plates according to the ratio of the voltage measurement value to the current measurement value, simultaneously obtaining the sample volume of the area according to the size scale between the voltage polar plates, and further obtaining the resistivity of the sample according to the following formula:wherein the meaning of each symbol is:ρthe resistivity of the composite medium particles to be detected is in the unit of omega m;Uis the voltage value between the voltage plates, and the unit is V;Ithe unit is A, the current value of a current polar plate, namely a series circuit;lis the length between the voltage plates, and the unit is m;hthe height of the interior of the box body is m;dthe width of the interior of the box body is m; and after the measurement is finished, the connecting wire of the measurement circuit is detached and connected to the wiring terminal on the other side of the polar plate, the measurement is finished again, and the average value of the resistivity measurements of the samples on the two sides is taken as a final measurement value to finish the test.

10. The method according to claim 9, wherein the voltage and current values of the standard-shaped electrical parameter measurement sample are measured by a quadrupole method.

Technical Field

The invention belongs to the technical field of electric power, and particularly relates to a conductive composite medium particle resistivity detection device and a conductive composite medium particle resistivity detection method, which belong to the application field of preparation and detection of a grounding material of an electric power system, in particular to detection of the resistivity of composite medium particles such as conductive graphite particles, carbon black particles, conductive concrete, powder resistance reducing agents, static pressure powder of resistance reducing modules, soil media and the like.

Background

The generalized electric power system comprises five links of power generation, power transmission, power transformation, power distribution and power utilization, and the grounding device used as overvoltage safety protection is widely applied to each link of the electric power system, and the electric power grounding device is a main component forming a zero potential reference point and antistatic grounding of the electric power system. For a long time, copper materials adopted by power systems often face the problem of high manufacturing cost, and carbon steel and galvanized steel are difficult to avoid the corrosion problem. In recent years, the existing non-metallic conductive materials basically take conductive graphite and conductive carbon black as base conductive materials, and the prepared graphite composite grounding materials, powder resistance reducing agents, grounding modules and other grounding materials are applied to various fields of power systems in a large area, so that the problems of material selection and corrosion resistance in the grounding field of the power systems are solved to a certain extent.

Actual electric power engineering finds that: different from a metal conductor with a fixed size, the powder composite medium particles cannot be shaped in form, and often contain air gaps, so that sample shaping equipment and a sample resistivity accurate measurement method are not needed when the resistivity of the powder composite medium particles is measured, and the electrical parameter measurement of a powder conductive medium cannot be performed according to a conventional measurement method, so that the preparation and detection work of the non-metal grounding material meets a larger technical bottleneck. Meanwhile, when the power department carries out resistivity measurement of soil media, a static pressure forming and resistivity measuring device for soil particles is also lacked. Therefore, the resistivity measuring device for the composite dielectric particles for electric grounding is developed, the detection process integrating the compression molding of the sample and the resistivity measurement is realized, a convenient and universal measuring method can be provided for the electrical parameter measurement of the composite dielectric particles, and the resistivity measuring device has high practical value and market popularization prospect.

Disclosure of Invention

In order to solve the above problems, the present invention discloses a conductive composite dielectric particle resistivity detection device and method, which solves the problems of sample pressing and electrical parameter measurement of the powder particle composite dielectric material in the existing power system, and comprises: the method can measure the resistivity of the soil medium in any form at the same time.

The composite medium particle resistivity detection device is suitable for compression molding and resistivity measurement of any solid powder particle medium, and the medium to be detected can be a single powder particle medium or a powder particle medium formed by mixing multiple materials. The device has the technical characteristics of flexible operation, easy assembly and disassembly, high compression molding rate, small measurement error, wide application range and the like.

The technical scheme adopted by the invention is as follows: the conductive composite medium particle resistivity detector structurally comprises a particle static pressure forming device and an electrical parameter measuring box, wherein the particle static pressure forming device has the function of realizing sample compression molding, and the electrical parameter measuring box is used for measuring the resistivity of a composite medium.

The particle static pressure forming device has the main function of carrying out static pressure forming on composite medium particles with different materials, particle sizes and components to prepare a standard-shape electrical parameter measurement sample of a composite medium to be measured. The part consists of eight main parts, namely a rotating arm, a middle shaft, a suspension beam, a threaded bearing, a fixed bearing, a support column, a pressure plate and a base, and the function and the structure of each part are as follows:

a rotating arm: the main function of the rotating arm is to realize the up-and-down movement of the middle shaft by adopting a manual twisting mode. The structure of the rotating arm comprises: a rotating arm joint, a pair of rotating arm rods which are symmetrical left and right, and two rotating arm ball heads. The rotating arm joint is connected with the rotating arm ball head through a rotating arm rod in a threaded connection or welding mode. The middle of the rotating arm section is provided with a through round hole for the through fixation of the top end of the middle shaft, a square through groove is arranged on the through hole vertical to the middle axis of the rotating arm rod, and a runway-shaped pin is arranged in the middle of the square through groove, so that the rotating arm and the middle shaft are fixed in the horizontal direction.

The middle shaft: the central shaft has the main function of driving the lower pressure plate to move up and down through the rotation of the rotating arm in the positive and negative directions. The structure of the middle shaft comprises 4 parts including an Ù spacer, a top rod, a threaded rod and a bottom rod, wherein the Ù spacer is a single accessory, and the top rod, the threaded rod and the bottom rod are of an integral structure with different diameters.

The diameter of the middle shaft ejector rod is smaller than that of the middle shaft threaded rod, and is consistent with that of a through round hole of the rotary arm joint, and the middle shaft ejector rod and the rotary arm joint are matched and fixed through the through hole. The middle shaft ejector rod is provided with a circumferential groove and a vertical annular runway groove, and an elastic opening Ù gasket is nested in the annular groove of the middle shaft ejector rod and used for fixing the top end of the middle shaft above the swivel arm joint so as to realize the fixation of the swivel arm and the middle shaft in the vertical direction. The runway-shaped pin penetrates through the opening of the Ù gasket and is placed in the groove of the middle shaft ejector rod, the opening of the Ù gasket is rotated to deviate from the square groove, and the middle shaft ejector rod can be fixed in the through round hole of the rotating arm joint because the outer diameter of the Ù gasket is larger than the diameter of the middle shaft ejector rod.

The middle shaft threaded rod is in threaded connection with a threaded bearing connected to the center of the suspension beam, and displacement of the threaded rod in the vertical direction is achieved.

The bottom rod of the middle shaft is gourd-shaped, and the maximum diameter of the bottom rod of the middle shaft is consistent with that of the middle threaded rod. The calabash-shaped bottom rod is provided with an annular circular groove in the middle, and a columnar pin is placed in the annular circular groove. On the one hand, can guarantee the firm connection of sill bar and below fixing bearing, on the other hand makes fixing bearing not take place to rotate when the well axle is rotatory to the steady of clamp plate on the horizontal direction has been guaranteed.

Suspension beam: the main function of the suspension beam is to fix the middle shaft threaded rod and the threaded bearing. The bolt through holes at the two ends of the suspension beam are used for connecting the support columns, and the through round hole at the center of the suspension beam is used for placing the threaded bearing. Threaded holes are formed in the two sides of the center of the suspension beam penetrating through the round hole, and the suspension beam is connected with the threaded bearing through countersunk bolts.

A threaded bearing: the main function of the screw bearing is to be in screw connection with the threaded rod part of the middle shaft. The threaded bearing is T-shaped in appearance, threads are arranged in the middle protruding cylinder and are matched and meshed with the threads of the middle shaft, and up-and-down displacement of the middle shaft is achieved. Countersunk bolts are placed in the through round holes on the two sides of the threaded bearing, and the threaded bearing is fixed on the suspension beam.

Fixing a bearing: the fixed bearing is a component for connecting the middle shaft and the pressure plate. The whole appearance of the fixed bearing is an upper circular plate and a lower circular plate, the inner wall of a through circular hole in the center of each circular plate is smooth and has no thread, and the through circular hole is used for penetrating through the bottom rod of the middle shaft and keeping the bottom ends of the two parallel and level. The upper circular plate of the fixed bearing is provided with two symmetrical through circular holes perpendicular to the radial direction of the circular plate, a smooth cylindrical pin penetrates through the symmetrical through circular holes, and the cylindrical pin is just embedded in the gourd-shaped annular circular groove of the bottom rod of the middle shaft. The lower circular plate of the fixed bearing is provided with 2-4 penetrating circular holes for placing countersunk bolts and connecting the countersunk bolts to the pressing plate.

Pressing a plate: the pressing plate is directly contacted with the composite medium particles to be detected and presses and molds the medium particles through pressure. The pressure plate is connected with a lower circular plate of the fixed bearing through threads. The two sides of the pressure plate are provided with circular arc notches, the radius of the circular arc notches is consistent with that of the upright post, and the circular arc notches abut against the upright post when the pressure plate vertically displaces, so that the horizontal direction is kept from rotating and displacing.

A support column: the support column is used for spacing the suspension beam and the base and maintaining the stability of the pressure plate in the horizontal direction. The pillar is divided into a countersunk head hexagon bolt and a cylinder, the countersunk head hexagon bolt and the cylinder are distributed inside and outside, wherein the hexagon bolt is used for connecting the suspension beam and the base, and the cylinder is used for supporting the suspension beam. The radius of the cylinder is equal to that of the arc notch of the pressing plate, so that the cylinder is completely clamped in the arc notch of the pressing plate. In addition, the countersunk head hexagon bolt can adopt general mechanical parts with different lengths on the market, and the cylinder can be designed into different lengths according to the size of a sample to be measured, so that the device can be suitable for static pressure forming of samples with various sizes, and the universality of the device is improved.

Base: the function of the base is used for placing the electrical parameter measuring box. The base is made of a horizontal metal plate, the size of the base is slightly larger than that of the suspension beam and the pressing plate, and threaded holes in two sides of the base are used for placing countersunk hexagon bolts in the inner layer of the support.

Electric parameter measuring box: the method has the main functions of measuring the voltage and current values of the standard-shaped electrical parameter measurement sample by adopting a quadrupole method, and further calculating the resistivity of the composite medium particles according to ohm's law and the volume of the medium. The electric parameter measuring box consists of a box body and four polar plates, and the functions and the structures of all the parts are as follows:

a box body: the box body has the function of placing composite medium particles with different grain diameters, components and materials. The appearance of the box body is a cuboid, and four pairs of square grooves are reserved on the side wall of the box body and used for placing two voltage pole plates and two current pole plates. And part of the through hole is reserved in the middle or at the top of the square groove, and the wiring terminal of the polar plate can penetrate through the through hole to facilitate measurement wiring. The box marks the length, width and height scales on the inner wall and the edge.

When the resistivity of the composite dielectric particles is measured, the box body and a sample to be measured are kept in electric insulation, so that a nylon plate, an epoxy resin plate or an acrylic plate can be used as a material for preparing the box body. If the box body is made of metal materials, insulating paint or other insulating layers need to be coated on the metal surfaces.

The polar plate has the function of realizing the measurement of the resistance value of the composite medium particle sample to be measured. The polar plate is nested in the square groove on the side wall of the box body, the wiring terminal penetrates through the side wall through hole, and the size of the wiring terminal is consistent with that of the side wall through hole, so that the composite medium particles to be measured do not leak out of the box body.

Of the four pole plates of the box body, the two pole plates at the outer side are current pole plates, the two pole plates at the inner side are voltage pole plates, and all the pole plates are consistent in size and made of metal materials such as copper, steel, aluminum and other alloy materials. The plate terminals are provided with perforations for connection to a measurement circuit. The resistance measuring circuit is formed by four polar plates, and has the advantages that the cross-section current density of the particle sample to be measured is more balanced, and resistance measuring errors caused by the self resistance of the wiring terminal, the contact resistance of a measuring terminal and the like are effectively avoided.

The invention also provides a concrete detection method of the conductive composite medium particle resistivity detection device, which comprises the following steps: firstly, according to the structure of a particle static pressure forming device, sequentially assembling a rotating arm, a middle shaft, a suspension beam, a threaded bearing, a fixed bearing, a pressing plate, a strut, a base and the like, wherein the proper height of the strut is selected according to the size of a sample to be measured and a measuring box; secondly, nesting the polar plate into a square groove on the side wall of the measuring box body, simultaneously filling any solid powder particles to be measured, and placing the box body between the base and the pressing plate after being filled; then, a rotating arm of the particle static pressure forming device is rotated to sequentially drive the middle shaft, the fixed bearing and the pressing plate, so that the particle sample to be measured in the box body is flattened, and meanwhile, the total amount of the medium is increased or reduced according to the state of particles in the box body. The lifting height of the pressing plate is repeatedly adjusted until the particles in the box body are smooth and smoothCan be fixed and formed; and finally, connecting the polar plate of the measuring box to an external circuit, obtaining the resistance value of the particle sample between the voltage polar plates according to the ratio of the voltage measurement value to the current measurement value, simultaneously obtaining the sample volume of the area according to the size scale between the voltage polar plates, and further obtaining the resistivity of the sample according to the following formula:the meaning of each symbol in the formula is:ρthe resistivity of the composite medium particles to be detected is in the unit of omega m;Uis the voltage value between the voltage plates, and the unit is V;Ithe unit is A, the current value of a current polar plate, namely a series circuit;lis the length between the voltage plates, and the unit is m;hthe height of the interior of the box body is m;dis the width of the interior of the box, and is given in m.

And after the measurement is finished, the connecting wire of the measurement circuit is detached and connected to the wiring terminal on the other side of the polar plate, the measurement is finished again, and the average value of the resistivity measurements of the samples on the two sides is taken as a final measurement value.

The conductive composite medium particle resistivity detection device has the advantages that: the structure of each component is simple, and the accessories can be flexibly assembled and disassembled; the operation and test process is convenient and fast, the measurement accuracy is high, and the measurement error can be effectively avoided; the method has wide application range and can be used for die forming and resistivity measurement of any solid powder particle medium.

Therefore, the invention has the following main beneficial effects: the structure is simple, the assembly and disassembly are flexible, the operation and test process is convenient, the measurement accuracy is high, and the measurement error can be effectively avoided; has wide application range.

Drawings

Reference will now be made in brief to the drawings that are needed to describe embodiments of the invention or the prior art. It is to be understood that the drawings in the following description are merely exemplary embodiments of the invention, and are merely representative of the dimensions thereof. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures.

Fig. 1 is a perspective view of a rotating arm.

Fig. 2 is a perspective view of the ball of the swivel arm used in fig. 1.

Fig. 3 is a perspective view of the swing arm lever used in fig. 1.

Fig. 4 is a perspective view of the knuckle used in fig. 1.

Fig. 5 is a schematic perspective view of the central axis.

Fig. 6 is a perspective view of the racetrack pin used in fig. 5.

Fig. 7 is a perspective view of the gasket used in fig. 5.

Fig. 8 is a schematic perspective view of a suspension beam.

Fig. 9 is a schematic perspective view of the inverted threaded bearing.

Fig. 10 is a schematic perspective view of the threaded bearing after being aligned.

Fig. 11 is a perspective view illustrating a construction of the countersunk head bolt used in fig. 10.

Fig. 12 is a schematic perspective view of the fixed bearing.

Fig. 13 is a perspective view of a cylindrical pin that may be used in the connection of fig. 12.

Fig. 14 is a schematic perspective view of a hexagon bolt.

Fig. 15 is a schematic perspective view of the cylinder.

Fig. 16 is a schematic perspective view of another hexagon bolt.

Fig. 17 is a perspective view of the pressing plate.

FIG. 18 is a schematic view of the assembly of the middle shaft, the fixing bearing and the pressing plate.

Fig. 19 is a perspective view of the base.

Fig. 20 is a schematic perspective view of an open electrical parameter measurement box.

Fig. 21 is a schematic perspective view of an open type electrode plate for an electrical parameter measurement box.

Fig. 22 is a schematic perspective view of the assembled open electrical parameter measurement box and electrode plate.

Fig. 23 is a schematic perspective view of a perforated electrical parameter measurement box.

Fig. 24 is a schematic perspective view of a plate for a perforated electrical parameter measurement box.

Fig. 25 is a schematic perspective view of the assembled perforated electrical parameter measurement box and the electrode plate.

FIG. 26 is a front view showing the overall structure of the particulate static pressure forming apparatus.

FIG. 27 is a front view of the overall structure of the particle static pressure molding apparatus and the open electrical parameter measuring chamber.

Fig. 28 is a schematic diagram of the three-dimensional structure of the whole particle static pressure forming device and the open type electrical parameter measuring box.

FIG. 29 is a schematic diagram of the connection of the open electrical parameter measurement box to an external circuit.

FIG. 30 is a schematic diagram of resistivity measurements on a particle-hydroformed sample.

Detailed Description

Referring to fig. 1 to 15, 17 to 22, and 26 to 28, a conductive composite dielectric particle resistivity detection device comprises a particle static pressure forming device and an electrical parameter measuring box, wherein the former is used for realizing sample compression molding, and the latter is used for measuring the resistivity of the composite dielectric; it is characterized in that the particle static pressure forming device consists of a rotating arm 1, a middle shaft 2, a suspension beam 3, a threaded bearing 4, a fixed bearing 5, a pressure plate 6, a strut 7, a base 8 and an electric parameter measuring box 9, wherein,

the rotating arm 1 is composed of a rotating arm joint 11, a pair of rotating arm rods 12 which are bilaterally symmetrical and two rotating arm ball heads 13, wherein a through round hole 111 is formed in the middle of the rotating arm joint 11, a square through groove 112 is formed in the through round hole 111 and is perpendicular to the central axis of the rotating arm rods, a through hole 113 is formed outside the square through groove 112, and the through hole 113 is communicated with the square through groove 112; the rotating arm rod 12 is composed of a rotating arm rod body 121 and a rotating arm rod body extension rod 122 which is positioned outside two ends of the rotating arm rod body 121 and is connected with the rotating arm rod body 121 into a whole; the rotating arm ball 13 is provided with a rotating arm outer hole 131 and a rotating arm inner hole 132 axially extending from the rotating arm outer hole 131 to the rotating arm ball 13, the rotating arm outer hole 131 is communicated with the rotating arm inner hole 132, the axes of the rotating arm outer hole 131 and the rotating arm inner hole 132 are overlapped, the diameter of the rotating arm outer hole 131 is larger than that of the rotating arm inner hole 132, a rotating arm rod body extension rod 122 at one end of each rotating arm rod 12 extends into the through round hole 111, and a rotating arm rod body extension rod 122 at the other end of each rotating arm rod 12 extends into the rotating arm inner hole 132 and the rotating arm outer hole 131 of one rotating arm ball 13;

the middle shaft 2 comprises a threaded rod 23, a top rod 22 extending outwards from one end of the threaded rod 23, a bottom rod 24 extending outwards from the other end of the threaded rod 23, an omega-shaped gasket 21 and a runway-shaped pin 25, wherein the outer diameter of the threaded rod 23 is larger than that of the top rod 22, the outer diameter of the threaded rod 23 is larger than that of the bottom rod 24, one end, close to the threaded rod 23, of the top rod 22 is provided with an annular groove 222, an annular groove 221 is formed between the annular groove 222 and one end, far away from the threaded rod 23, of the top rod 22, the omega-shaped gasket 21 is embedded into the annular groove 221, the runway-shaped pin 25 is embedded into the annular groove 222, the bottom rod 24 is provided with an annular circular groove 241, the diameter of the top rod 22 is smaller than that of the threaded rod 23, the outer diameter of the omega-shaped gasket 21 is larger than that of the top rod 22, the bottom rod 24 is in a gourd shape, and the maximum diameter of the bottom rod 24 is consistent with the outer diameter of the threaded rod 23;

the suspension beam 3 is provided with a suspension beam body, the center of the suspension beam body is provided with a through hole 32 which penetrates through the suspension beam body up and down, the near two ends of the suspension beam body are provided with bolt through holes 31 which penetrate through the suspension beam body up and down, and the outer side of the through hole 32 is provided with two side threaded holes 33 which extend from the lower surface to the upper surface;

the appearance of the threaded bearing 4 is in a T shape, the threaded bearing 4 is composed of a convex cylinder 41 and a bearing base positioned below the convex cylinder 41, threads are arranged inside the convex cylinder 41, through holes 42 which penetrate through the convex cylinder 41 up and down are formed in the bearing base on two sides of the convex cylinder 41, and the through holes 42 are used for placing countersunk bolts 43;

the fixed bearing 5 is composed of an upper layer circular plate 52, a lower layer circular plate 53 and a cylindrical pin 55, wherein the upper layer circular plate 52 and the lower layer circular plate 53 are overlapped in axis, the outer diameter of the upper layer circular plate 52 is smaller than that of the lower layer circular plate 53, the center of the fixed bearing 5 is provided with a circular plate center hole 51 penetrating from the upper surface of the upper layer circular plate 52 to the lower surface of the lower layer circular plate 53, the upper layer circular plate 52 is provided with two symmetrical upper layer circular plate holes 54 vertical to the radial direction of the circular plate, the lower layer circular plate 53 is provided with a plurality of lower layer circular plate holes 56, and the lower layer circular plate holes 56 are positioned outside the upper layer circular plate 52;

the pressing plate 6 is composed of a pressing plate body, and arc-shaped notches 61 are formed in two sides of the pressing plate body;

the support 7 is composed of a countersunk head hexagon bolt 71 and a cylinder 72, the countersunk head hexagon bolt 71 is composed of a bolt body 711 and a bolt head 712 which are connected into a whole, the diameter of the bolt body 711 is smaller than that of the bolt head 712, the bolt body 711 is externally provided with threads, and the top of the bolt head 712 is provided with a rotating hole 713; the cylinder 72 has a cylinder body 721, and the cylinder body 721 has a cylinder hole 722 penetrating in the axial direction; the cylinder 72 is sleeved outside the countersunk hexagon bolt 71;

the base 8 is composed of a base body, and base threaded holes 81 which are vertically communicated are formed in two sides of the base body;

the electrical parameter measuring box 9 is composed of a box body 91 and four polar plates 92, the box body 91 is of a cuboid structure with an open top, four pairs of square grooves 911 are formed in one pair of long side surfaces of the box body 91, a hanging groove 912 is formed in the long side surface of the box body 91 above the square grooves 911, the hanging groove 912 is not communicated with the bottom plate of the box body 91, and the square grooves 911 are communicated with the upper surface of the bottom plate of the box body 91; the pole plate 92 consists of a pole plate body 922 and a hanging plate 923 which is positioned above the pole plate body and is connected with the pole plate body into a whole, the length of the hanging plate 923 is greater than that of the pole plate body 922, and the two ends of the hanging plate 923 are provided with through wiring holes 921; the pole plate body 922 is placed in the square groove 911, the hanging plate 923 is placed in the hanging groove 912, and the wiring hole 921 is located on the outer side of the box body 91;

the runway-shaped pin 25 is used for fixing the rotating arm 1 and the middle shaft 2 in the horizontal direction; the Ù -shaped gasket 21 is used for fixing the top end of the middle shaft above the swivel arm joint so as to fix the swivel arm 1 and the middle shaft 2 in the vertical direction; the threaded rod 23 is in threaded connection with a threaded bearing connected to the center of the suspension beam, so that the threaded rod is guaranteed to move in the vertical direction; the cylindrical pin bottom rod is placed in the annular circular groove 241 and is firmly connected with the lower fixed bearing, so that the fixed bearing is prevented from rotating when the middle shaft rotates, and the pressing plate is ensured to be stable in the horizontal direction; the bolt through holes 31 at the two ends of the suspension beam are used for connecting the support columns, the through hole 32 at the center of the suspension beam is used for placing a threaded bearing, and the suspension beam is connected with the threaded bearing by adopting a countersunk bolt; countersunk bolts 43 are placed in the through holes 42 at the two sides of the threaded bearing to fix the threaded bearing on the suspension beam; the cylindrical pin 55 is nested in the annular circular groove of the bottom rod of the middle shaft; the lower round plate hole 56 is used for placing a countersunk bolt and is connected to the pressure plate; the threaded holes 81 on the two sides of the base are used for placing countersunk hexagon bolts of the inner layer of the pillar; the electrical parameter measurement box is placed on the base.

Referring to fig. 1 to 14, 16, 17 to 22, and 26 to 28, a conductivity type composite dielectric particle resistivity detection apparatus is basically the same, except that: the support 7 is composed of a countersunk head hexagon bolt 71 and a cylinder 72, the countersunk head hexagon bolt 71 is composed of a bolt body 711, a bolt head 712, a connecting body 714 and a protrusion 715 which are connected into a whole, the diameter of the bolt body 711 is smaller than that of the bolt head 712, the bolt body 711 is externally provided with threads, the top of the bolt head 712 is provided with a rotating hole 713, the upper end of the bolt body 711 is connected with the connecting body 714, the upper end of the connecting body 714 is connected with the bolt head 712, the lower end of the bolt body 711 is connected with the protrusion 715, the diameter of the protrusion 715 is smaller than that of the bolt body 711, and the diameter of the connecting body 714 is smaller than that of the bolt body 711; the cylinder 72 has a cylinder body 721, and the cylinder body 721 has a cylinder hole 722 penetrating in the axial direction; the cylinder 72 is fitted over the countersunk head hexagon bolts 71.

Due to the protrusion 715, the installation is more convenient.

Referring to fig. 1 to 17 and fig. 23 to 28, a conductivity type composite dielectric particle resistivity detection apparatus is basically the same, except that:

the electrical parameter measuring box 9 is composed of a box body 91 and four polar plates 92, the box body 91 is of a cuboid structure with an open top, four pairs of square grooves 911 are formed in one pair of long side surfaces of the box body 91, a hanging groove 912 is formed in the middle of the long side surface of the box body 91 above the square grooves 911, the hanging groove 912 is a long side surface, and the square grooves 911 penetrate through the upper surface of the bottom plate of the box body 91; the pole plate 92 consists of a pole plate body 922 and hanging plates 923 which are positioned outside the two sides of the center of the length direction of the pole plate body and are connected with the pole plate body into a whole, and the two ends near the hanging plates 923 are provided with wire connecting holes 921 which penetrate through; the polar plate body 922 is placed in the square groove 911, the hanging plate 923 is placed in the hanging groove 912, and the wiring hole 921 is located on the outer side of the box 91.

The electrical parameter measuring box 9 in the device adopts a perforated electrical parameter measuring box; whereas the upper side is open.

The invention also provides a concrete detection method of the conductive composite medium particle resistivity detection device, which comprises the following steps: firstly, according to the structure of a particle static pressure forming device, sequentially assembling a rotating arm, a middle shaft, a suspension beam, a threaded bearing, a fixed bearing, a pressing plate, a strut, a base and the like, wherein the proper height of the strut is selected according to the size of a sample to be measured and a measuring box; secondly, nesting the polar plate into a square groove on the side wall of the measuring box body, simultaneously filling any solid powder particles to be measured, and placing the box body between the base and the pressing plate after being filled; then, rotating a rotating arm of the particle static pressure forming device, sequentially driving a middle shaft, a fixed bearing and a pressing plate, flattening the particle sample to be detected in the box body, and increasing or reducing the total amount of the medium according to the state of particles in the box body; repeatedly adjusting the lifting height of the pressing plate until the particles in the box body are flat and can be fixed and molded; and finally, connecting the polar plate of the measuring box to an external circuit, obtaining the resistance value of the particle sample between the voltage polar plates according to the ratio of the voltage measurement value to the current measurement value, simultaneously obtaining the sample volume of the area according to the size scale between the voltage polar plates, and further obtaining the resistivity of the sample according to the following formula:wherein the meaning of each symbol is:ρthe resistivity of the composite medium particles to be detected is in the unit of omega m;Uis the voltage value between the voltage plates, and the unit is V;Ithe unit is A, the current value of a current polar plate, namely a series circuit;lis the length between the voltage plates, and the unit is m;hthe height of the interior of the box body is m;dthe width of the interior of the box body is m; and S is the area, after the measurement is finished, the connecting wire of the measurement circuit is detached and connected to the wiring terminal on the other side of the polar plate, the measurement is finished again, and the average value of the resistivity measurements of the samples on the two sides is taken as a final measurement value to finish the test.

lThe length between the voltage plates refers to the distance between the two plates in the middle, i.e., the voltage plates in FIG. 22 or FIG. 25 (the thickness without voltage plates))；hThe height of the interior of the box body is the distance from the upper surface of the bottom plate of the box body to the upper surface of the side plate;dthe width of the interior of the box body, namely the distance between the inner walls of the two long side plates.

In the present application, fig. 20 to 22 are schematic diagrams of an open electrical parameter measurement box and a plate. 4 pairs of square grooves are reserved on the side wall and used for placing 2 voltage pole plates and two current pole plates, the tops of the square grooves are perforated, and the wiring terminals of the pole plates are exposed out of the through holes so as to be convenient for measuring wiring. Similarly, fig. 23-25, schematic diagrams of a perforated electrical parameter measurement box and plate. The difference between the two is that: and a part of through holes are reserved in the middle of the side wall square groove, and the connecting terminal of the polar plate just penetrates through the through holes to be connected with an external circuit.

This embodiment provides a specific detection method for a conductive composite medium particle resistivity detection device, which is to assemble parts of a particle static pressure forming device as shown in fig. 28, place conductive crystalline flake graphite to be detected into an electrical parameter measurement box as shown in fig. 20-22, rotate a rotating arm of the particle static pressure forming device, sequentially drive a central shaft, a fixed bearing and a pressing plate, and flatten a particle sample to be detected in a box until conductive graphite particles are fixed and formed as shown in fig. 27 and 28.

The plate of the measuring chamber is connected to an external circuit, and the resistance value of the particle sample between the voltage plates is obtained according to the ratio of the voltage and current measurement values, and the whole structure of the connected measuring chamber and external circuit is shown in fig. 29. In the embodiment, the scale graphite micro-sheet with the grain size of 80 meshes is placed in a particle static pressure forming device, the scale graphite sample subjected to static pressure forming is compact and firm in whole, and the sample does not fall off after the measuring box is turned over.

In the measurement circuit shown in fig. 30, V is a voltmeter, a is an ammeter, DC is a direct current power supply, K is a switch, R is a component to be measured in the present application, and Rt is a sliding varistor. And sequentially opening the switch and the slide rheostat, measuring the voltage values of two voltage pole plates in the middle of the box body by adopting a voltmeter (or a universal meter), and measuring the current value of the loop by adopting the voltmeter (or the universal meter). In this example, the average voltage value of the scale graphite sample obtained after adjusting the sliding rheostat for a plurality of times was 2.19X 10^-3V, current ofThe average value was 25.31A.

In an embodiment, the length between the voltage plates is 0.1 m; the height of the interior of the box body is 0.05m, and the width of the interior of the box body is 0.05 m. According to the formula () The resistivity of the sample was determined to be about 2.16X 10^-6Ω·m。

The invention has the following main beneficial effects: the structure is simple, the assembly and disassembly are flexible, the operation and test process is convenient, the measurement accuracy is high, and the measurement error can be effectively avoided; has wide application range.

The above-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be construed as limiting the present invention. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.