阅读说明：本技术 一种混凝土空心板梁铰缝破损检测装置 (Concrete hollow slab beam hinge joint damage detection device ) 是由 杨元奎 赵国银 孙宇 于 2021-09-27 设计创作，主要内容包括：本发明涉及铰缝破损检测技术领域,且公开了一种混凝土空心板梁铰缝破损检测装置,包括相对设置的尺杆和拨动机构,所述拨动机构的接地端与空心板梁连接,所述拨动机构的接地端的数量有多个,并相互错开,所述尺杆上压紧设置有上浮标和下浮标,所述拨动机构的作用端为一个,并位于上浮标和下浮标之间。本发明,通过将拨动机构设置多个相互错开的接地端,使得各个接地端可以分别设置在空心板梁沿铰缝方向的不同位置,从而可在同一时间段内对铰缝进行多点检测,提高测量覆盖面,并可利用拨动机构的作用端对上浮标和下浮标作用施力,得到多个检测点中铰缝破损程度最大的数据,可大大提高检测的准确度。(The invention relates to the technical field of hinge joint damage detection, and discloses a concrete hollow slab beam hinge joint damage detection device which comprises a ruler rod and a shifting mechanism which are oppositely arranged, wherein the grounding end of the shifting mechanism is connected with a hollow slab beam, the grounding ends of the shifting mechanism are multiple and are staggered with each other, an upper buoy and a lower buoy are tightly pressed on the ruler rod, and the action end of the shifting mechanism is one and is positioned between the upper buoy and the lower buoy. According to the invention, the toggle mechanism is provided with the plurality of mutually staggered grounding ends, so that each grounding end can be respectively arranged at different positions of the hollow plate beam along the hinge joint direction, the hinge joint can be detected at multiple points in the same time period, the measurement coverage surface is improved, the action of the toggle mechanism can be used for applying force to the upper buoy and the lower buoy, the data of the maximum hinge joint damage degree in the plurality of detection points is obtained, and the detection accuracy can be greatly improved.)

1. The utility model provides a damaged detection device of concrete hollow slab beam hinge joint, includes relative chi pole (1) and the toggle mechanism that sets up, the earthing terminal and the hollow slab beam of toggle mechanism are connected its characterized in that: the number of the grounding ends of the toggle mechanism is multiple and staggered, an upper buoy (9) and a lower buoy (10) are arranged on the ruler rod (1) in a pressing mode, and the action end of the toggle mechanism is one and located between the upper buoy (9) and the lower buoy (10).

2. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 1, characterized in that: the toggle mechanism comprises a plurality of vertical rods (5) and transverse rods (6) which are in one-to-one correspondence with the vertical rods (5), the bottom end of each vertical rod (5) is the grounding end of the toggle mechanism, and the other end of each vertical rod (5) is detachably connected with the transverse rods (6).

3. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 2, characterized in that: the cross rod (6) comprises a body (601), a plurality of bolt holes (602) are formed in the body (601), mounting holes corresponding to the bolt holes (602) are formed in the vertical rods (5), and bolts are inserted into the mounting holes and the bolt holes (602) to fixedly connect the vertical rods (5) and the body (601).

4. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 3, characterized in that: toggle mechanism still includes a application of force spare (8), application of force spare (8) are toggle mechanism's effect end, application of force spare (8) rotate the joint with each horizontal pole (6).

5. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 4, characterized in that: force application piece (8) include main part (801), arc spout (804) have been seted up to the surface of main part (801), the top outside and the bottom outside symmetry of arc spout (804) are provided with cowl (803), horizontal pole (6) still include arc fixture block (603) with body (601) body coupling, arc fixture block (603) rotate the joint in arc spout (804), the height of arc fixture block (603) is greater than the distance between two cowl (803).

6. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 5, characterized in that: the top surface, the bottom surface and the inner side surface of each arc-shaped fixture block (603) are respectively in sliding fit with the top surface, the bottom surface and the inner side surface of each arc-shaped sliding chute (804), and the outer side surfaces of the arc-shaped fixture blocks (603) are in sliding fit with the inner side surfaces of the two arc-shaped baffles (803).

7. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 6, characterized in that: a distance is formed between the side surface of the arc sliding groove (804) and the side surfaces of the two arc baffles (803), and the length of the distance is greater than that of the arc fixture block (603) in the distance direction.

8. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 5, characterized in that: the structure of the upper buoy (9) is the same as that of the lower buoy (10), the ruler rod (1) is a cylinder, the upper buoy (9), the lower buoy (10) and the main body (801) are all sleeved on the ruler rod (1), the main body (801) is provided with an insertion hole (802) for inserting the ruler rod (1) in a penetrating mode, and the diameter of the insertion hole (802) is larger than that of the ruler rod (1).

9. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 8, characterized in that: the upper buoy (9) comprises a cylinder body (901), the outer diameter of the cylinder body (901) is smaller than that of the main body (801), an annular groove (903) is formed in the inner wall of the cylinder body (901), two semicircular extrusion plates (906) are arranged in the annular groove (903) in a sliding fit mode, a plurality of circumferentially arranged springs (904) are arranged between the outer side face of each semicircular extrusion plate (906) and the inner side face of the annular groove (903), and the inner side faces of the two semicircular extrusion plates (906) extend inwards to the outer portion of the annular groove (903) and are tightly pressed with the outer surface of the ruler rod (1).

10. The device for detecting the hinge joint damage of the concrete hollow slab beam according to claim 9, characterized in that: one end and semicircle ring stripper plate (906) fixed connection of spring (904), other end fixedly connected with and two semicircle ring stripper plate (906) one-to-one push pedal (905), two the center of push pedal (905) lateral surface all is provided with spacing recess, barrel (901) are gone up the spiro union have with two spacing recess one-to-one screw rod (902), the tip of screw rod (902) is located spacing recess.

Technical Field

The invention relates to the technical field of hinge joint damage detection, in particular to a hinge joint damage detection device for a concrete hollow slab beam.

Background

In the construction of roads and bridges in China, most small and medium-sized structures adopt an assembled hinged plate girder structure, namely, all concrete hollow plate girders are transversely connected through hinge joints, so that all the plate girders are transversely connected into a whole. The hinge joint is connected by pouring concrete at the joint of the two plate beams, utilizing the close combination of newly poured concrete, stressed steel bars and an original structure, transmitting shearing force between the plate beams through the shear hinge, and jointly bearing vehicle load, thereby ensuring the service life of the plate beams and the driving safety.

After long-term rolling and aging of a vehicle, the hinge joint responsible for transferring the shearing force is easy to break, so that the adjacent plate beams generate longitudinal relative displacement at the hinge joint position under the operation condition, when the longitudinal relative displacement exceeds a standard value, the stress condition of a single beam can be caused, and safety risks are easy to occur.

For example, the invention is a Chinese patent with application number CN201310068412.4 and publication number CN103148763B, entitled "a method for detecting the damage of the hinge joint of a concrete hollow slab beam", and specifically discloses a method for detecting the damage of the hinge joint of the concrete hollow slab beam, which comprises recording the extreme value of the relative movement displacement of the hinge joint position of the slab beam in a mechanical mode, evaluating the damage condition of the hinge joint of the slab beam, recording the initial position of a buoy after installing a hinge joint meter, recording the acquisition time and the position of the buoy at the time in each acquisition process, comparing the two to obtain the maximum value condition of the relative displacement of the hinge joint between the slab beams, and is characterized in that the hinge joint meter consists of a probe, a vertical ruler, an upper buoy and a lower buoy, the probe is of an integrated structure, the left part and the right part of the probe are horizontal and parallel steel plates, the middle part of the probe is a vertical steel plate, the bottom of the middle steel plate of the probe is connected with the left steel plate of the probe, the top of the middle steel plate of the probe is connected with the right steel plate of the probe, the invention can obtain the extreme value of the relative movement displacement of the plate beam hinge joint in the monitoring time period by respectively reading the existing positions of the upper and lower floating marks at different time periods and comparing the existing positions with the initial positions, thereby evaluating the damage condition of the hinge joint.

Although the method for detecting the hinge joint damage of the concrete hollow slab beam realizes the purpose of detecting the hinge joint damage by using a mechanical mode and overcomes the defects of an electrical measurement method, the length of the hinge joint of the conventional hollow slab beam reaches more than 10m and 10m, and the damage degrees of the hinge joint are different at different places, when a vehicle passes by from one side of the hollow slab beam, the hollow slab beam generates a certain inclination, the displacement of two adjacent hollow slab beams measured at different positions are different, namely the damage degrees of the detected hinge joint are different, and the detection method can only carry out single-point measurement in a time period to obtain a group of data of the point, the measurement coverage surface is narrow, and the accuracy of the obtained measurement data is low.

Disclosure of Invention

The invention aims to provide a device for detecting the damage of a hinge joint of a concrete hollow slab beam, which aims to overcome the defects in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a damaged detection device of concrete hollow slab beam hinge joint, is including relative chi pole and the toggle mechanism that sets up, toggle mechanism's earthing terminal is connected with the hollow slab beam, the quantity of toggle mechanism's earthing terminal has a plurality ofly to stagger each other, it is provided with buoy and buoy down to compress tightly on the chi pole, toggle mechanism's effect end is one to be located buoy and between the buoy down.

Foretell hollow slab beam hinge joint damage detection device of concrete, toggle mechanism include a plurality of montants and with the horizontal pole of a plurality of montant one-to-one, the bottom of montant is toggle mechanism's earthing terminal, the other end and the horizontal pole of montant can be dismantled and be connected.

Foretell hollow slab beam hinge joint damage detection device of concrete, the horizontal pole includes the body, be provided with a plurality of bolt holes on the body, be provided with the mounting hole corresponding with the bolt hole on the montant, insert the bolt with montant and body fixed connection in mounting hole and the bolt hole.

Foretell hollow slab beam hinge joint damage detection device of concrete, toggle mechanism still includes a force application piece, force application piece is toggle mechanism's effect end, force application piece rotates the joint with each horizontal pole.

Foretell hollow slab beam hinge joint damage detection device of concrete, force application part includes the main part, the arc spout has been seted up to the surface of main part, the top outside and the bottom outside symmetry of arc spout are provided with cowl, the horizontal pole still includes the arc fixture block with body coupling, the arc fixture block rotates the joint in the arc spout, the height of arc fixture block is greater than the distance between two cowl.

Foretell hollow slab beam hinge joint damage detection device of concrete, the top surface, the bottom surface, the medial surface of arc fixture block slide with top surface, bottom surface, the medial surface of arc spout respectively and laminate, the lateral surface of arc fixture block slides with the medial surface of two cowl.

According to the hinge joint damage detection device for the concrete hollow slab beam, a distance is formed between the side face of the arc-shaped sliding groove and the side faces of the two arc-shaped baffle plates, and the length of the distance is greater than that of the arc-shaped clamping block in the distance direction.

Foretell hollow slab beam hinge joint damage detection device of concrete, the structure of going up buoy and buoy is the same down, the chi pole is the cylinder, go up buoy, buoy and main part are all established on the chi pole, run through on the main part and be provided with the jack that supplies chi pole male, the diameter of jack is greater than the diameter of chi pole.

Foretell hollow slab beam hinge joint damage detection device of concrete, it includes the barrel to go up the buoy, the outside diameter of barrel is less than the outside diameter of main part, the inner wall of barrel is provided with the ring groove, it is provided with two semicircle ring stripper plates, two to slide the laminating in the ring groove be provided with the spring that a plurality of circumference were arranged between the lateral surface of semicircle ring stripper plate and the medial surface in ring groove, two the medial surface of semicircle ring stripper plate is to inside extension to the outside in ring groove and compress tightly mutually with the surface of chi pole.

Foretell hollow slab beam hinge joint damage detection device, the one end and the semicircle ring stripper plate fixed connection of spring, the push pedal of other end fixedly connected with and two semicircle ring stripper plate one-to-ones, two the center of push pedal lateral surface all is provided with spacing recess, the spiro union has the screw rod with two spacing recess one-to-ones on the barrel, the tip of screw rod is located spacing recess.

In the technical scheme, the toggle mechanism is provided with the plurality of grounding ends which are staggered with each other, so that the grounding ends can be respectively arranged at different positions of the hollow slab beam along the hinge joint direction, the hinge joint can be detected at multiple points in the same time period, the measurement coverage surface is improved, the action of the toggle mechanism can be used for applying force to the upper buoy and the lower buoy, and data with the maximum hinge joint damage degree in multiple detection points is obtained.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural diagram of a device for detecting damage to a hinge joint of a concrete hollow slab beam according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of part A according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an exploded structure of an upper buoy, a force application member and a lower buoy provided by an embodiment of the invention;

FIG. 4 is a cross-sectional view of an upper buoy provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a cross bar according to an embodiment of the present invention;

FIG. 6 is an enlarged view of the part B according to the embodiment of the present invention;

fig. 7 is an enlarged schematic structural diagram of a part C according to an embodiment of the present invention.

Description of reference numerals:

1. a ruler rod; 2. a first scale mark; 3. an inclined plate; 4. a second scale mark; 5. a vertical rod; 6. a cross bar; 601. a body; 602. bolt holes; 603. an arc-shaped fixture block; 7. a double splint; 8. a force application member; 801. a main body; 802. a jack; 803. an arc-shaped baffle plate; 804. an arc-shaped chute; 9. an upper buoy; 901. a barrel; 902. a screw; 903. a circular groove; 904. a spring; 905. pushing the plate; 906. a semi-circular ring extrusion plate; 10. a lower buoy; 11. a locking member; 1101. an arc-shaped sleeving part; 1102. a fixed part.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 7, the device for detecting damage to a hinge joint of a concrete hollow slab beam provided by an embodiment of the present invention includes a ruler rod 1 and a toggle mechanism, which are oppositely disposed, a ground terminal of the toggle mechanism is connected to the hollow slab beam, a plurality of ground terminals of the toggle mechanism are provided and are staggered with each other, an upper buoy 9 and a lower buoy 10 are tightly pressed on the ruler rod 1, and an action end of the toggle mechanism is one and is located between the upper buoy 9 and the lower buoy 10.

Specifically, the device for detecting damage to hinge joints of concrete hollow slab beams provided in this embodiment is used for measuring longitudinal relative displacement of the concrete hollow slab beams in use, so as to obtain the damage degree of the hinge joints between two adjacent hollow slab beams. The ruler rod 1 and the toggle mechanism are oppositely arranged on two adjacent hollow slab beams, the grounding ends of the ruler rod 1 and the toggle mechanism are respectively and fixedly arranged on the two adjacent hollow slab beams and can be fixedly connected with the hollow slab beams in an adhesive or other detachable mode, in order to improve the connection firmness, the grounding ends of the ruler rod 1 and the toggle mechanism are respectively and fixedly provided with a mounting disc with larger bottom surface area, the mounting disc is connected with the hollow slab beams to improve the contact area, the ruler rod 1 is provided with a first scale mark 2 for obtaining the height data of the upper buoy 9 and the lower buoy 10, the upper buoy 9 and the lower buoy 10 are tightly pressed and arranged on the ruler rod 1 and can longitudinally move along the ruler rod 1, the upper buoy 9 and the lower buoy 10 can be stopped at the moved positions by utilizing the pressing mode, namely the upper buoy 9 and the lower buoy 10 can be stopped along the ruler rod 1 when the ruler rod moves, and the other end of the toggle mechanism is an acting end, the effect end is located between buoy 9 and lower buoy 10 for provide the effort of removal to buoy 9 and lower buoy 10, when chi pole 1 and toggle mechanism take place longitudinal displacement along with two hollow slab beams, can order about toggle mechanism's effect end makes buoy 9 and lower buoy 10 produce longitudinal displacement, toggle mechanism's earthing terminal has a plurality ofly, and stagger each other, can be connected with the different positions of hollow slab beam simultaneously, and toggle mechanism's effect end is one, make when record data at every turn, only need record a set of data, can not increase the data quantity of record because of the increase of earthing terminal quantity. The working principle of the device for detecting the hinge joint damage of the concrete hollow slab beam is that firstly, under the condition that no vehicle passes through, two adjacent hollow slab beams are in a static state, grounding ends of a ruler rod 1 and a toggle mechanism are respectively and fixedly arranged on the two adjacent hollow slab beams, the hinge joint is positioned between the ruler rod 1 and the toggle mechanism, a plurality of grounding ends of the toggle mechanism are arranged at intervals along the length direction of the hinge joint, then an upper buoy 9 and a lower buoy 10 respectively move relative to an action end of the toggle mechanism until the bottom of the upper buoy 9 is contacted and attached with the top of the action end, the top of the lower buoy 10 is contacted and attached with the bottom of the action end, then values (X0 and Y0) on a first scale line 2 corresponding to the upper buoy 9 and the lower buoy 10 are recorded, when the vehicle passes through from one side of the hollow slab beam, the hollow slab beam pressed by the vehicle is displaced downwards, when the damage degrees of different positions of the hinge joint are different, the hollow plate beam is unevenly stressed due to the fact that the vehicle is pressed from one side, the hollow plate beam can incline, when the vehicle presses the hollow plate beam where the toggle mechanism is located, the hollow plate beam can drive a plurality of grounding ends of the toggle mechanism to downwards move with a certain inclination, then the grounding ends drive action ends to move in the same mode, the action ends downwards extrude the lower buoy 10 with a certain inclination, the lower buoy 10 downwards moves along the ruler rod 1, the final position of the downward movement of the lower buoy 10 is the lowest position of the inclined action ends, the value Y1 is recorded after a period of time, when the vehicle presses the hollow plate beam where the ruler rod 1 is located, the hollow plate beam can drive the ruler rod 1 to downwards move, the action ends have upward thrust on the upper buoy 9, the upper buoy 9 upwards moves along the ruler rod 1, the value X1 is recorded after a period of time, the values of X1 and Y1 are recorded simultaneously and compared with the values of X0 and Y0 to see if the standard value is exceeded. Because the length of conventional hollow slab beam hinge joint reaches more than 10m and 10m, everywhere the damaged degree is different, when the vehicle was passed through from one side of hollow slab beam, can make hollow slab beam produce certain gradient, the displacement volume of two adjacent hollow slab beams of measuring at different positions will have the difference this moment, in the prior art, because can only carry out single-point measurement in a period of time, obtain a set of data of this point, its measurement coverage is narrower, the measuring data's that obtains the degree of accuracy is lower. The invention has the improvement that the single-point detection is improved into multi-point simultaneous detection, the action end is one, and the obtained group of data is the data with the maximum displacement of the hollow plate beam in the multi-point detection.

In this embodiment, through setting up a plurality of earthing terminals that stagger each other with toggle mechanism for each earthing terminal can set up respectively at the different positions of hollow slab roof beam along the hinge joint direction, thereby can carry out the multiple spot to the hinge joint in same time quantum and detect, improves and measures the covering surface, and usable toggle mechanism's action end is to last buoy 9 and lower buoy 10 effect application of force, obtains the biggest data of hinge joint damage degree in a plurality of check points, can improve the degree of accuracy that detects greatly.

In the embodiment, only one action end is needed, so that only one group of data is needed to be recorded when the data is recorded, the data recording amount of additional evidence data is avoided, the recorded data is the data with the maximum displacement of the hollow slab beam in the multi-point detection, and the operation is very convenient.

In this embodiment, through setting up a plurality of earthing terminals, a plurality of earthing terminals can remove along with the removal of hollow slab roof beam simultaneously, later give the effect end with the dynamics transmission simultaneously to can increase the dynamics that the effect end moved down, make its effort to lower buoy 10 bigger, make the lower buoy 10 move down more easily.

In this embodiment, toggle mechanism includes a plurality of montants 5 and the horizontal pole 6 with a plurality of montants 5 one-to-one, and the bottom of montant 5 is toggle mechanism's earthing terminal, and the other end of montant 5 can be dismantled with horizontal pole 6 and be connected. Utilize horizontal pole 6 can be connected montant 5 and toggle mechanism's effect end, horizontal pole 6 is the level setting, montant 5 is perpendicular setting, utilize montant 5 to be connected with dismantling of horizontal pole 6, can change montant 5 and horizontal pole 6 relative position, thereby change the distance between montant 5 and toggle mechanism's the effect end, the adjustment of this distance can change toggle mechanism and chi pole 1 to the distance value of hinge joint, thereby make this detection device applicable in the hinge joint use of multiple width, application scope is improved.

A preferred embodiment of the detachable connection between the vertical rod 5 and the cross rod 6 is that the cross rod 6 includes a body 601, a plurality of bolt holes 602 are formed in the body 601, a mounting hole corresponding to the bolt hole 602 is formed in the vertical rod 5, and bolts are inserted into the mounting hole and the bolt hole 602 to fixedly connect the vertical rod 5 and the body 601. Wherein two are no less than to the quantity of mounting hole, can ensure the fastness that montant 5 and body 601 are connected, through the relative position of adjustment mounting hole and a plurality of bolt hole 602, can change the relative position of montant 5 and horizontal pole 6, this mode firm in connection, and can satisfy the dismantlement demand.

In this embodiment, the toggle mechanism further comprises a force application member 8, the force application member 8 is an action end of the toggle mechanism, and the force application member 8 is rotationally clamped with each cross rod 6. Utilize the rotation joint of application of force spare 8 and each horizontal pole 6, can rotate at will around application of force spare 8 to a plurality of horizontal poles 6, and can not break away from, can change the angle between 6 two liang of a plurality of horizontal poles to can change the distance between two liang of a plurality of earthing terminals, make this detection device's measurement coverage adjustable, improve the flexibility.

Wherein, for realizing the rotation joint of application of force spare 8 and each horizontal pole 6, in a preferred embodiment, application of force spare 8 includes main part 801, arc spout 804 has been seted up to the surface of main part 801, arc spout 804's the top outside and bottom outside symmetry are provided with cowl 803, horizontal pole 6 still includes the arc fixture block 603 with body 601 body coupling, arc fixture block 603 rotates the joint in arc spout 804, arc fixture block 603 is higher than the distance between two cowl 803, body 601 passes from between two cowl 803. Arc fixture block 603, the mutual adaptation of arc spout 804 and cowl 803, arc fixture block 603 can slide in arc spout 804, the slip orbit of arc fixture block 603 is arc, thereby realize whole horizontal pole 6 around the pivoted purpose of application of force spare 8, the height of arc fixture block 603 is greater than the distance between two cowl 803, it is spacing to make arc fixture block 603 by cowl 803, thereby make arc fixture block 603 can not break away from arc spout 804 by oneself, effectively guarantee that toggle mechanism lasts to have the effect to floating buoy 9 and lower buoy 10.

The body 601 is a cuboid, the top surface and the bottom surface of the body 601 are respectively attached to the opposite surfaces of the two arc-shaped baffles 803, meanwhile, the top surface, the bottom surface and the inner side surface of the arc-shaped fixture block 603 are respectively in sliding fit with the top surface, the bottom surface and the inner side surface of the arc-shaped sliding chute 804, the outer side surface of the arc-shaped fixture block 603 is in sliding fit with the inner side surfaces of the two arc-shaped baffles 803, so that the connecting position of the cross bar 6 and the force applying part 8 has no other movable space, the cross bar 6 can only rotate around the central axis of the main body 801, therefore, the reaction timeliness of the force application member 8 and the accuracy of the measured data can be improved, when the grounding end of the toggle mechanism or the grounding end of the ruler rod 1 is displaced, the force can be immediately transmitted to the force application member 8, and then the force application member 8 drives the upper buoy 9 and the lower buoy 10 to move longitudinally, because the force application member 8 and the cross bar 6 have no moving empty space, the measured data are more accurate.

In this embodiment, a distance is formed between the side surface of the arc chute 804 and the side surfaces of the two arc baffles 803, the length of the distance is greater than the length of the arc clamping block 603 in the distance direction, and through the design, the arc clamping block 603 can be inserted into the arc chute 804 from the distance or be pulled out from the arc chute 804, so that the transverse rod 6 and the force application member 8 can be detached, and the installation is also very convenient.

The upper buoy 9 and the lower buoy 10 are identical in structure, the ruler rod 1 is a cylinder, the upper buoy 9, the lower buoy 10 and the main body 801 are all sleeved on the ruler rod 1, the main body 801 is provided with an insertion hole 802 for inserting the ruler rod 1 in a penetrating mode, and the diameter of the insertion hole 802 is larger than that of the ruler rod 1. Because the upper buoy 9, the lower buoy 10 and the main body 801 are all sleeved on the ruler rod 1, the upper buoy cannot be separated from the ruler rod 1, and the stability is improved; meanwhile, because the diameter of the jack 802 is larger than that of the ruler rod 1, a gap is formed between the inner wall of the jack 802 and the outer wall of the ruler rod 1, and the force application member 8 can have a space for generating a certain inclination by using the gap, so that the requirement that the toggle mechanism is inclined is met;

furthermore, because upper buoy 9, lower buoy 10 and main part 801 all overlap and establish on chi pole 1, make the area of contact of the top surface of main part 801 and the bottom surface of upper buoy 9 bigger, the area of contact of the bottom surface of main part 801 and the top surface of lower buoy 10 is bigger, thereby multiplicable main part 801 is to upper buoy 9, the action point of lower buoy 10, and the action point distributes more evenly, make upper buoy 9, the atress of lower buoy 10 more even, can make upper buoy 9, the longitudinal movement of lower buoy 10 is more smooth, the dead phenomenon of card is difficult to appear, among the prior art, upper buoy 9, the action point that receives of lower buoy 10 only has one side, cause upper buoy 9 very easily, the dead phenomenon of card of lower buoy 10.

Further, the upper buoy 9 includes barrel 901, the outside diameter of barrel 901 is less than the outside diameter of main part 801, the inner wall of barrel 901 is provided with ring groove 903, it is provided with two semicircle ring stripper plates 906 to slide the laminating in ring groove 903, the slip laminating of this department is the slip laminating of the upper and lower side of ring groove 903 and the upper and lower side of semicircle ring stripper plate 906, make semicircle ring stripper plate 906 can be along radially sliding in ring groove 903, but can not take place the axis and remove, make the reaction of upper buoy 9 more timely, do not remove the empty volume, guarantee measured data's precision, be provided with a plurality of circumference's of arranging spring 904 between the lateral surface of two semicircle ring stripper plates 906 and the medial surface of ring groove 903, the medial surface of two semicircle ring stripper plates 906 inwards extends to the outside of ring groove 903 and compresses tightly mutually with the surface of chi pole 1. The purpose that the upper buoy 9 and the lower buoy 10 stop along the ruler rod 1 when the ruler rod 1 runs is achieved by the compression arrangement of the inner side surfaces of the two semicircular ring extrusion plates 906 and the outer surface of the ruler rod 1;

simultaneously, because the inside surface inboard of semicircle ring stripper plate 906 extends to the outside of ring groove 903, make to be formed with the activity space between the inner wall of barrel 901 and the surface of chi pole 1, when application of force spare 8 is the incline direction to the effort of floating buoy 9, chi pole 1 can produce the extrusion force to the outside to semicircle ring stripper plate 906, make spring 904 compressed, semicircle ring stripper plate 906 removes in to ring groove 903, and the inner wall of barrel 901 and the surface contactless of chi pole 1, thereby further make upper buoy 9 can not block diely, and accomplish and move up the action, the structure of lower buoy 10 is the same with anti-sticking diem principle and floating buoy 9, no longer give unnecessary details.

The springs 904 are divided into an upper group and a lower group, the number of the springs 904 in each group is multiple, the springs are arranged circumferentially at equal intervals, and the stress uniformity of the semi-circular ring extrusion plate 906 can be improved by the mode.

Further, one end of the spring 904 is fixedly connected with the semi-circular ring extrusion plates 906, the other end of the spring 904 is fixedly connected with the push plates 905 which are in one-to-one correspondence with the two semi-circular ring extrusion plates 906, the centers of the outer side surfaces of the two push plates 905 are respectively provided with a limiting groove, the barrel 901 is screwed with the screw rods 902 which are in one-to-one correspondence with the two limiting grooves, and the end parts of the screw rods 902 are located in the limiting grooves. The screw 902 can be rotated to move the cylinder 901 to the inner side or the outer side, when the screw 902 moves to the inner side of the cylinder 901, the end of the screw 902 can extrude the corresponding push plate 905 to move to the inner side, so that the spring 904 is compressed, the elastic force of the spring 904 is increased, the extrusion force of the semicircular ring extrusion plate 906 and the ruler rod 1 is realized, the extrusion force of the semicircular ring extrusion plate 906 and the ruler rod 1 can be realized by rotating the screw 902, and the upper buoy 9 and the lower buoy 10 can be ensured to stop when walking. Utilize the cooperation of spacing recess and the tip of screw rod 902, can make the tip of screw rod 902 lie in the central point of semicircle ring stripper plate 906 all the time and put, can not break away from by oneself to can not cause the uneven phenomenon that appears of semicircle ring stripper plate 906 atress, improve semicircle ring stripper plate 906's stability.

In this embodiment, in order to prevent that upper buoy 9 and lower buoy 10 constantly take place to rotate at the in-process that removes, and influence its stable longitudinal movement, it is further, equal fixed mounting has double splint 7 on the lateral surface of upper buoy 9 and lower buoy 10, double splint 7 includes the horizontal plate that two opposition set up, be formed with the interval between two horizontal plates, there is inclined plate 3 through retaining member 11 fixed mounting on chi pole 1, retaining member 11 is located the below of buoy 10 down, inclined plate 3 passes between two horizontal plates on two double splint 7, and the thickness of inclined plate 3 is the same with the interval between two horizontal plates. Because the relative chi pole 1 fixed connection of hang plate 3, and the hang plate 3 passes between two horizontal plates on two double splint 7 respectively to can carry on spacingly to two double splint 7, make it unable rotation, thereby make upper buoy 9 and lower buoy 10 can not take place to rotate.

Further, all be provided with second scale mark 4 on the side about the hang plate 3, the scale of second scale mark 4 is more accurate for the scale of first scale mark 2, two horizontal plates on the double splint 7 on the upper buoy 9 are as the third buoy, two horizontal plates on the double splint 7 on the lower buoy 10 are as the fourth buoy, can read second scale mark 4 on the hang plate 3, the reading mode of third buoy and fourth buoy is the same with the reading mode of upper buoy 9 and lower buoy 10, because the hang plate 3 is the slope form, relative and vertical form chi pole 1, when upper buoy 9 and lower buoy 10 longitudinal movement, the length value of the hang plate 3 that passes through is bigger, thereby can improve the accuracy of measuring value, and the acute angle contained angle between hang plate 3 and chi pole 1 is bigger, the accuracy of measuring value is higher.

Specifically, the acute angle included angle between the inclined plate 3 and the ruler rod 1 is 60 degrees, so that the longitudinal distance between the ruler rod 1 and the upper buoy 9 and the lower buoy 10 is half of the length of the inclined plate 3, namely when the upper buoy 9 or the lower buoy 10 longitudinally moves for 1mm, the longitudinal distance is 2mm relative to the length direction of the inclined plate 3, the accuracy of the second scale mark 4 can be improved by two times, and the measurement accuracy of the detection device is improved by two times. Compared with the prior art, the precision of the invention is 1mm, and the precision can be at least improved to 0.5mm, so that the data measured by the detection device is more accurate.

In this embodiment, the retaining member 11 includes two arc-shaped sleeving parts 1101 and two fixing parts 1102, the two fixing parts 1102 are respectively connected with the end parts of the two arc-shaped sleeving parts 1101, the inclined plate 3 is fixedly mounted on one of the arc-shaped sleeving parts 1101, the two arc-shaped sleeving parts 1101 are sleeved on the ruler rod 1, and the two fixing parts 1102 are fixedly connected through a bolt, so that the retaining member 11 is fixedly mounted on the ruler rod 1.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.