阅读说明：本技术 高压薄壁孔快速连接器 (High-pressure thin-wall hole quick connector ) 是由 韦性琛 窦洪武 李立君 于 2019-11-21 设计创作，主要内容包括：本发明提供了一种高压薄壁孔快速连接器,其包括外套、芯轴、卡爪、活塞、连接杆、尾座套和手柄,芯轴与连接杆固定连接,活塞滑动套接于芯轴与外套之间；且活塞的左端活动连接卡爪的尾端并能带动卡爪移动,转动手柄能带动连接杆沿轴心向右移动的同时,且能使芯轴抵顶活塞向右移动。本发明相对已有的快速连接器,使用密封件更少,结构更为可靠、合理；使产品制造成本更低,安装维修更简单,使用操作更便捷,封堵连接效果更优异；使得高压薄壁孔快速连接器使用过程更高效,更易于维护,标准化程度进一步提高。(The invention provides high-pressure thin-wall hole quick connectors, which comprise an outer sleeve, a mandrel, a jaw, a piston, a connecting rod, a tail seat sleeve and a handle, wherein the mandrel is fixedly connected with the connecting rod, the piston is sleeved between the mandrel and the outer sleeve in a sliding manner, the left end of the piston is movably connected with the tail end of the jaw and can drive the jaw to move, the handle is rotated to drive the connecting rod to move rightwards along the axis, and meanwhile, the mandrel can be enabled to prop against the piston to move rightwards.)

1. High pressure thin wall hole quick connector, its characterized in that: the device comprises an outer sleeve, a mandrel, a clamping jaw, a piston, a connecting rod, a tail seat sleeve and a handle, wherein the mandrel is fixedly connected with the connecting rod, and the piston is sleeved between the mandrel and the outer sleeve in a sliding manner; and the left end of the piston is movably connected with the tail end of the clamping jaw and can drive the clamping jaw to move, the handle is rotated to drive the connecting rod to move rightwards along the axis, and meanwhile, the mandrel can push the piston to move rightwards.

2. The high-pressure thin-walled bore quick connector of claim 1, wherein the outer sleeve is generally cylindrical and has accommodating through holes coaxially formed therewith, the accommodating through holes communicating the front end and the rear end of the outer sleeve, and annular retaining shoulders are formed on the outer periphery of the front end of the outer sleeve and protruding forward;

the accommodating through hole between the front end of the outer sleeve and the tailstock sleeve is sequentially divided into an th part, a second part, a third part and a fourth part which are coaxial and have gradually increased diameters, a th annular stop is formed at the junction of the th part and the second part, and a second annular stop is formed at the junction of the second part and the third part;

the outer sleeve is also provided with medium connecting parts with medium holes, and the medium holes are communicated with the third part of the accommodating through hole of the outer sleeve;

the containing through hole at the tail end of the outer sleeve is in threaded connection with the front section of the tail seat sleeve in a sealing manner;

the tail seat sleeve comprises a sleeve inner cavity with an opening at the front end, an annular step is formed at the tail part of the tail seat sleeve, and a tail part through hole determined by the annular step is communicated with the sleeve inner cavity coaxially.

3. The high-pressure thin-walled hole quick connector of claim 2, wherein the piston is slidably mounted in the third part of the containing through hole, the piston is provided with piston through holes coaxial with the piston through hole, the piston through hole is sequentially divided into four parts with the same axis from the front end to the tail end, namely, a part, a second part, a third part and a fourth part, a piston annular stop is formed at the junction of the part and the second part, a second piston annular stop is formed at the junction of the second part and the third part, and a third piston annular stop is formed at the junction of the third part and the fourth part;

and the periphery of the middle part of the piston is in sliding connection with the hole wall of the third part of the accommodating through hole in a sealing way.

4. The high pressure thin walled bore quick connector of claim 3, wherein the diameter of the third portion is smallest and the diameter of the th portion is larger than the diameter of the second portion, the diameter of the second portion is larger than the diameter of the third portion, and the diameter of the third portion is smaller than the diameter of the fourth portion.

5. The high-pressure thin-walled hole quick connector of claim 3, wherein the mandrel is cylindrical and divided into th, second, third and fourth coaxial sections, th section is a conical body with a gradually reduced outer diameter from the front end to the junction with the second section, the diameter of the third section of the mandrel is larger than that of the fourth section, and the junction of the third section and the fourth section forms an annular mandrel step;

the fourth section of the mandrel penetrates through the third part of the piston through hole of the piston, and the outer wall of the fourth section of the mandrel is in sliding contact with the inner wall of the third part of the piston through hole;

the tail end of the fourth section of the mandrel, which is positioned at the fourth part of the piston through hole of the piston, extends backwards to form a connecting part with an external thread, and the connecting part is in threaded connection with an internal thread hole formed at the front end of the connecting rod; and a sealing O-shaped ring and a check ring are clamped between the fourth section of the mandrel and the fourth part of the piston through hole, so that the sealing O-shaped ring and the check ring are in sliding sealing.

6. The high-pressure thin-walled aperture quick connector of claim 5, wherein the th section is divided into a front part, a middle part and a tail part from front to back, the middle part is a cylinder with the same outer diameter, the front part and the tail part are both cones with the outer diameters decreasing from front to back, and the inclination angles of the cones are matched with the inclination angles of the inner walls of the front ends of the claws.

7. The high-pressure thin-walled hole quick connector as claimed in claim 1, wherein the connecting rod is provided at its periphery with an annular shoulder projecting radially outward, and the left end face of the annular shoulder is capable of abutting against and stopping against the right end face of the piston and a third annular stopper of the housing receiving through hole; the connecting rod is also sleeved with a connecting rod spring, and two ends of the connecting rod spring respectively abut against the right end face of the annular retaining shoulder and the annular step of the tailstock sleeve; the tail part of the connecting rod is slidably sleeved in the tail through hole of the tail seat sleeve, and the exposed end of the connecting rod is hinged with the head part of the handle through a hinge pin;

the handle head is provided with working end faces perpendicular to the axis of the handle length and two inclined end faces on two sides, a smooth arc transition face is arranged between the working end faces and the inclined end faces, the included angle between the working end faces and the inclined end faces is smaller than 90 degrees, and the farthest distance between the smooth arc transition face and the axis of the hinge pin is larger than the perpendicular distance between the inclined end faces and the axis of the hinge pin.

8. The high pressure thin walled bore quick connector of claim 1,

an annular bulge formed by intersecting a left radial conical surface and a right radial conical surface is formed on the periphery of the tail end of the clamping jaw;

the end surface of the tail end of the clamping jaw is provided with an annular recess formed by intersecting a radial step surface and a circumferential step surface;

still include outer jack catch ring cover, interior jack catch ring cover and ring cover spring:

the inner hole of the inner jaw ring sleeve is equal in diameter, the inner wall of the inner hole is in sliding sleeve connection with the outer wall of the third section of the mandrel, an annular boss is arranged on the periphery of the inner jaw ring sleeve, a ring sleeve spring is sleeved on the inner jaw ring sleeve, the left end of the ring sleeve spring abuts against the right side face of the annular boss, and the right end of the ring sleeve spring abuts against the annular stop of the second piston;

the inner wall of the hole of the outer jaw ring sleeve is in sliding sleeve joint with the outer peripheral surface of the annular boss of the inner jaw ring sleeve, the outer peripheral surface of the outer jaw ring sleeve is provided with external threads which are fixedly connected with the internal threads arranged at the th part of the piston through hole in a threaded manner, and the left end surface of the outer jaw ring sleeve can be connected and abutted with the second annular stop;

the inner wall of the hole at the left end of the outer jaw ring sleeve is also provided with an annular retaining shoulder protruding towards the hole center, a gap is reserved between the inner wall surface of the annular retaining shoulder of the outer jaw ring sleeve and the outer wall of the third section of the mandrel for the tail of the jaw to pass through, a gap is reserved between the annular retaining shoulder of the outer jaw ring sleeve and the annular boss of the inner jaw ring sleeve for clamping and installing an annular bulge for accommodating the tail end of the jaw, the left end of the inner jaw ring sleeve positioned at the left side of the annular boss extends into the annular recess at the tail end of the jaw, and the left end of the inner jaw ring sleeve can abut against the radial step surface of the annular recess of the jaw.

9. The high pressure thin walled bore quick connector of claim 1, wherein the right side of the annular shoulder is a radial taper that mates with the left radial taper of the jaw annular protrusion.

10. The high pressure thin wall hole quick connector of claim 1, wherein the jaws are comprised of at least four independent jaw assemblies, each jaw assembly having a wedge-shaped cross section, the jaw assemblies when combined together providing the jaws overall cylindrical shape with an axial center through hole of ;

an annular claw groove is formed in the periphery of the claw close to the front end, O-shaped rings made of elastic materials are installed in the claw groove, the width of the claw groove is larger than the diameter of the O-shaped rings, when the O-shaped rings are arranged close to the right side wall of the claw groove, the distance between the O-shaped rings and the left side wall of the claw groove is larger than the thickness of the hole wall of a round hole to be detected of a sample piece to be detected, the left side wall of the claw groove is a radial conical surface, the radius of the radial conical surface is gradually reduced from left to right, annular radial conical surfaces are formed on the inner surface of the front end of the claw, and the radius of the radial conical surfaces is gradually reduced along the direction.

Technical Field

The invention belongs to the field of quick connectors for air tightness detection, and particularly relates to a device for quickly connecting and plugging a high-pressure thin-wall hole on a tested piece.

Background

In the product quality testing process, there is a great demand for a quick connector, because the quick connector is often used to simplify the process of leak testing a processed product, when in use, the connector is quickly coupled with a test piece, the test piece includes a product for passing and storing fluid or a product for working in pressure or vacuum, after the connection is completed, the test fluid can reach the tested piece through the connector to determine whether the test piece leaks, and in order to improve the production efficiency, the reliability and convenience of the quick connector are very important. For a quick connector for plugging and connecting high-pressure thin-wall holes, the problems of connection and plugging of the high-pressure thin-wall holes on a tested piece need to be solved, the high efficiency of operation needs to be realized, the reliability of connection is enhanced, and the use and maintenance cost can be reduced.

Disclosure of Invention

In view of the above, the invention aims to provide high-pressure thin-wall-hole quick connectors, which comprise an outer sleeve, a mandrel, a jaw, a piston, a connecting rod, a tail seat sleeve and a handle, wherein the mandrel is fixedly connected with the connecting rod, the piston is sleeved between the mandrel and the outer sleeve in a sliding manner, the left end of the piston is movably connected with the tail end of the jaw and can drive the jaw to move, the handle is rotated to drive the connecting rod to move rightwards along an axis, and meanwhile, the mandrel can be enabled to push against the piston to move rightwards.

, the outer sleeve is integrally cylindrical, is provided with a accommodating through hole which is coaxial with the outer sleeve integrally, and is communicated with the front end and the tail end of the outer sleeve, and the outer periphery of the front end of the outer sleeve is also provided with an annular retaining shoulder which protrudes forward ;

the accommodating through hole between the front end of the outer sleeve and the tailstock sleeve is sequentially divided into an th part, a second part, a third part and a fourth part which are coaxial and have gradually increased diameters, a th annular stop is formed at the junction of the th part and the second part, and a second annular stop is formed at the junction of the second part and the third part;

the outer sleeve is also provided with medium connecting parts with medium holes, and the medium holes are communicated with the third part of the accommodating through hole of the outer sleeve;

the containing through hole at the tail end of the outer sleeve is in threaded connection with the front section of the tail seat sleeve in a sealing manner;

the tail seat sleeve comprises a sleeve inner cavity with an opening at the front end, an annular step is formed at the tail part of the tail seat sleeve, and a tail part through hole determined by the annular step is communicated with the sleeve inner cavity coaxially.

, the piston is slidably arranged in the third part of the containing through hole, the piston is provided with a piston through hole which is coaxial with the piston through hole, the piston through hole is sequentially divided into four parts, namely a th part, a second part, a third part and a fourth part, which are coaxial from the front end to the tail end, wherein a th piston annular stop is formed at the junction of the th part and the second part;

and the periphery of the middle part of the piston is in sliding connection with the hole wall of the third part of the accommodating through hole in a sealing way.

Further , the diameter of the third section is smallest, and the diameter of the th section is larger than the diameter of the second section, which is larger than the diameter of the third section, which is smaller than the diameter of the fourth section.

, dividing the whole mandrel into a section, a second section, a third section and a fourth section which are coaxial, wherein the section is a conical body with the whole diameter gradually reduced from the front end to the junction with the second section;

the fourth section of the mandrel penetrates through the third part of the piston through hole of the piston, and the outer wall of the fourth section of the mandrel is in sliding contact with the inner wall of the third part of the piston through hole;

the tail end of the fourth section of the mandrel, which is positioned at the fourth part of the piston through hole of the piston, extends backwards to form a connecting part with an external thread, and the connecting part is in threaded connection with an internal thread hole formed at the front end of the connecting rod; and a sealing O-shaped ring and a check ring are clamped between the fourth section of the mandrel and the fourth part of the piston through hole, so that the sealing O-shaped ring and the check ring are in sliding sealing.

And , dividing the section from front to back into a front part, a middle part and a tail part, wherein the middle part is a cylinder with the same outer diameter, the front part and the tail part are conical bodies with the outer diameters decreasing from front to back, and the inclination angles of the conical bodies are matched with the inclination angles of the inner walls of the front ends of the clamping jaws.

, arranging an annular stop shoulder which protrudes outwards in the radial direction on the periphery of the connecting rod, wherein the left end face of the annular stop shoulder can be abutted and stopped against the right end face of the piston and a third annular stop of the outer sleeve accommodating through hole;

the handle head is provided with working end faces perpendicular to the axis of the handle length and two inclined end faces on two sides, a smooth arc transition face is arranged between the working end faces and the inclined end faces, the included angle between the working end faces and the inclined end faces is smaller than 90 degrees, and the farthest distance between the smooth arc transition face and the axis of the hinge pin is larger than the perpendicular distance between the inclined end faces and the axis of the hinge pin.

, forming an annular bulge formed by intersecting a left radial conical surface and a right radial conical surface on the periphery of the tail end of the jaw;

the end surface of the tail end of the clamping jaw is provided with an annular recess formed by intersecting a radial step surface and a circumferential step surface;

still include outer jack catch ring cover, interior jack catch ring cover and ring cover spring:

the inner hole of the inner jaw ring sleeve is equal in diameter, the inner wall of the inner hole is in sliding sleeve connection with the outer wall of the third section of the mandrel, an annular boss is arranged on the periphery of the inner jaw ring sleeve, a ring sleeve spring is sleeved on the inner jaw ring sleeve, the left end of the ring sleeve spring abuts against the right side face of the annular boss, and the right end of the ring sleeve spring abuts against the annular stop of the second piston;

the inner wall of the hole of the outer jaw ring sleeve is in sliding sleeve joint with the outer peripheral surface of the annular boss of the inner jaw ring sleeve, the outer peripheral surface of the outer jaw ring sleeve is provided with external threads which are fixedly connected with the internal threads arranged at the th part of the piston through hole in a threaded manner, and the left end surface of the outer jaw ring sleeve can be connected and abutted with the second annular stop;

the inner wall of the hole at the left end of the outer jaw ring sleeve is also provided with an annular retaining shoulder protruding towards the hole center, a gap is reserved between the inner wall surface of the annular retaining shoulder of the outer jaw ring sleeve and the outer wall of the third section of the mandrel for the tail of the jaw to pass through, a gap is reserved between the annular retaining shoulder of the outer jaw ring sleeve and the annular boss of the inner jaw ring sleeve for clamping and installing an annular bulge for accommodating the tail end of the jaw, the left end of the inner jaw ring sleeve positioned at the left side of the annular boss extends into the annular recess at the tail end of the jaw, and the left end of the inner jaw ring sleeve can abut against the radial step surface of the annular recess of the jaw.

And , the right side surface of the annular blocking shoulder is a radial conical surface matched with the left radial conical surface of the annular bulge of the claw.

, the jaw is composed of at least four independent jaw components, each jaw component has a wedge-shaped cross section, and when the jaw components are combined, the whole jaw is in a cylindrical shape with a axle center through hole;

an annular claw groove is formed in the periphery of the claw close to the front end, O-shaped rings made of elastic materials are installed in the claw groove, the width of the claw groove is larger than the diameter of the O-shaped rings, when the O-shaped rings are arranged close to the right side wall of the claw groove, the distance between the O-shaped rings and the left side wall of the claw groove is larger than the thickness of the hole wall of a round hole to be detected of a sample piece to be detected, the left side wall of the claw groove is a radial conical surface, the radius of the radial conical surface is gradually reduced from left to right, annular radial conical surfaces are formed on the inner surface of the front end of the claw, and the radius of the radial conical surfaces is gradually reduced along the direction.

Compared with the existing quick connector, the high-pressure thin-wall hole quick connector has the advantages that the number of used sealing parts is less, the structure is more reliable and reasonable, the manufacturing cost of the product is lower, the installation and the maintenance are simpler, the use and the operation are more convenient, the plugging and connecting effects are more excellent, the use process of the high-pressure thin-wall hole quick connector is more efficient and easier to maintain, and the standardization degree is further improved by .

Drawings

The accompanying drawings, which form a part hereof , are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, an illustrative embodiment of the invention and the description of the invention for purposes of explanation and not limitation, of the invention, wherein:

fig. 1 is a schematic sectional view of a state 1 in which a connector of the present invention is inserted to block a high-pressure thin-walled hole;

FIG. 2 is a schematic cross-sectional view of the present connector in state 2 inserted to block a high pressure thin wall hole;

FIG. 3 is a front end view of the pawl;

FIG. 4 is a cross-sectional view AA in FIG. 3;

fig. 5 is a schematic structural view of the handle.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in the figure, the high-pressure thin-wall hole quick connector comprises an outer sleeve 5, a mandrel 1, a jaw 4, a jaw outer ring sleeve 3, a jaw inner ring sleeve 6, a piston 7, a jaw inner ring sleeve spring 8, a connecting rod 13, a connecting rod spring 14, a tailstock sleeve 16 and a handle 17;

the tail end (namely the right end in the figure) of the mandrel 1 is fixedly connected with a connecting rod 13, and a piston 7 is sleeved between the mandrel 1 and the outer sleeve 5 in a sliding manner; the left end of the piston 7 is movably connected with the tail end of the clamping jaw 4, the right end of the piston 7 can abut against the connecting rod 13, the right end of the connecting rod 13 is hinged with a handle 17, and the connecting rod 13 can be driven to move along the axis by rotating the handle 17;

the outer sleeve 5 is integrally cylindrical, and is provided with accommodating through holes 25 which are coaxial with the outer sleeve, the accommodating through holes 25 are communicated with the front end 50 and the tail end 51 of the outer sleeve 5, the outer peripheral edge of the front end 50 of the outer sleeve 5 is also provided with annular retaining shoulders 52 protruding forwards, and the annular retaining shoulders 52 are used for shielding the O-shaped ring 2;

the accommodating through hole 25 from the front end 50 of the outer sleeve to the tailstock sleeve 16 is sequentially divided into four coaxial parts, namely a th part 251, a second part 252, a third part 253 and a fourth part 254, wherein the diameter of the th part 251 is smaller than that of the second part 252, so that a annular stop 36 is formed at the junction of the th part 251 and the second part 252, the diameter of the second part 252 is smaller than that of the third part 253, so that a second annular stop 35 is formed at the junction of the second part 252 and the third part 253, the diameter of the third part 253 is smaller than that of the fourth part 254, so that a third annular stop 20 is formed at the junction of the third part 253 and the fourth part 254, and the tail end of the fourth part 254 forms a fourth annular stop 37 from the front end of the tailstock sleeve 16;

the outer sleeve 5 is also provided with a medium connecting part provided with a medium hole 31 for connecting a fluid connector, wherein the medium hole 31 is communicated with the third part 253 of the accommodating through hole 25 of the outer sleeve 5;

the accommodating through hole 25 at the tail end 51 of the outer sleeve 5 is fixed with the external thread at the periphery of the front section of the tail seat sleeve 16 in a threaded manner through internal threads, and specifically, the threaded part with the internal threads at the tail part of the fourth part 254 of the accommodating through hole 25 of the outer sleeve 5 is fixed with the external thread at the periphery of the front section of the tail seat sleeve 16 in a threaded manner; in order to ensure the sealing performance between the two connections, an O-shaped ring 15 for sealing is arranged between the two connections;

the tail seat sleeve 16 comprises a sleeve inner cavity 1601 with an opening at the front end, an annular step 1602 is formed at the tail part of the tail seat sleeve, and a tail through hole 1603 defined by the annular step 1602 is coaxially communicated with the sleeve inner cavity 1601;

the piston 7 is slidably arranged in a third part 253 of the accommodating through hole 25, the piston 7 is provided with a piston through hole coaxial with the whole piston through hole, and the piston through hole is sequentially divided into four parts , 72, 73 and 74 coaxial with each other from the front end to the tail end, wherein the diameter of the third part 73 is the smallest, the diameter of the part 71 is larger than that of the second part 72, a piston annular stop 712 is formed at the junction of the part 71 and the second part 72, the diameter of the second part 72 is larger than that of the third part 73, a second piston annular stop 723 is formed at the junction of the second part 72 and the third part 73, the diameter of the third part 73 is smaller than that of the fourth part 74, and a third piston annular stop 734 is formed at the junction of the third part 73 and the fourth part 74;

an annular groove is formed in the periphery of the middle of the piston 7, and an O-shaped ring 9 and a check ring 10 are clamped between the annular groove and the wall of the third portion 253 of the accommodating through hole to ensure the sealing property between the periphery of the piston 7 and the wall of the accommodating through hole 25;

the mandrel 1 is cylindrical overall and is divided into a th section 101, a 102 th section, a 103 th section and a 104 th section which are coaxial, the th section 101 is conical body with the outer diameter gradually reduced from the front end to the junction with the 102 th section, preferably, the th section 101 is divided into a front part 1011, a middle part 1012 and a tail part 1013 from front to back, the middle part 1012 is a cylinder with the same outer diameter, the front part 1011 and the tail part 1013 are conical bodies with the outer diameter gradually reduced from front to back, and the inclination angle of the conical bodies is matched with the inclination angle of the inner wall of the front end of the claw 4;

the diameter of the third section 103 of the mandrel 1 is larger than that of the fourth section 104, and an annular mandrel step 28 is formed at the junction of the third section 103 and the fourth section 104;

the fourth section 14 of the mandrel 1 passes through the third part 73 of the piston through hole of the piston 7, and the outer wall of the fourth section 14 of the mandrel 1 is in sliding contact with the inner wall of the third part 73 of the piston through hole;

the tail end of the fourth section 14 of the mandrel 1, which is positioned at the fourth part 73 of the piston through hole of the piston 7, extends backwards to form a connecting part 104 with an external thread, and the connecting part is in threaded connection with an internal thread hole formed at the front end of the connecting rod 13; a sealing O-shaped ring 11 and a retainer ring 12 are also clamped between the fourth section 14 of the mandrel 1 and the fourth part 73 of the piston through hole, so that sliding sealing is kept between the sealing O-shaped ring 11 and the retainer ring;

the periphery of the connecting rod 13 is provided with an annular stop shoulder 1301 which protrudes outwards in the radial direction, the left end face of the annular stop shoulder 1301 can be abutted and stopped with the right end face of the piston 7 and a third annular stop 20 of the outer sleeve accommodating through hole, the connecting rod 13 is further sleeved with a connecting rod spring 14, and two ends of the connecting rod spring 14 respectively abut against the right end face of the annular stop shoulder 1301 and an annular step 1602 of the tailstock sleeve 16; the tail part of the connecting rod 13 is slidably sleeved in a tail through hole 1603 of the tail seat sleeve 16, and the exposed end is hinged with the head part of the handle 17 through a hinge pin 18;

as shown in figure 5, the handle head part of the invention is provided with a working end surface 38 perpendicular to the axial center of the length of the handle and two inclined end surfaces 39 at two sides, a smooth arc transition surface 389 is arranged between the working end surface 38 and the inclined end surfaces 39, the included angle α angle between the working end surface 38 and the inclined end surfaces 39 is smaller than 90 degrees, the farthest distance L2 between the smooth arc transition surface 389 and the axial center of the hinge pin 18 is larger than the perpendicular distance L1 between the inclined end surfaces 39 and the axial center of the hinge pin 18, as shown in the figure, R1 is L1, R2 is L2, because R2 is larger than R1, L2 is larger than L1, the moment of L2 is larger than L1, and therefore, when the connector is in the second state, the connector is in a locking state, the structure effectively prevents the connection failure caused by the rotation of the handle, and greatly improves the.

Jaw 4 is comprised of four separate jaw assemblies 400, although this number may vary, each jaw assembly 400 having a wedge-shaped cross-section as shown in the front end view of fig. 3, as shown in fig. 3 and 4, the four jaw assemblies 400 when combined provide the overall jaw with a cylindrical shape having an axial center bore of ;

an annular jaw groove 41 is formed on the periphery of the jaw 4 close to the front end, O-shaped rings 2 made of elastic materials are installed in the jaw groove 41, the width of the jaw groove 41 is larger than the diameter of the O-shaped rings 2, namely when the O-shaped rings 2 are arranged close to the right side wall 412 of the jaw groove 41, the distance between the O-shaped rings 2 and the left side wall 411 of the jaw groove 41 is larger than the thickness of the hole wall of the round hole 23 to be detected of the sample 22 to be detected;

, the elastic material of the O-shaped ring 2 can be neoprene, urethane, buna rubber-N, fluoroplastic or ethylene propylene rubber, etc.

As shown in fig. 4, annular radial tapered surfaces 42 are formed on the inner surface of the front end of the jaw 4, the radius of the radial tapered surfaces 42 is gradually reduced from the front end to the tail end of the jaw, when the mandrel 1 and the jaw 4 move relatively in the axial direction, the head of the jaw assembly 400 can be gathered towards the center along the radial direction (as in the state of fig. 1), namely, in a retracted state, or can be expanded along the radial direction (as in the state of fig. 2), namely, in an expanded state, under the elastic force of the elastic O-ring 2 and under the action of the circumference of the -th segment 101 of the mandrel 1 against the radial tapered surfaces 42;

the outer periphery of the tail end of the claw 4 is provided with an annular bulge 43 formed by intersecting a left radial conical surface 431 and a right radial conical surface 432;

the end surface of the tail end of the clamping jaw is provided with an annular recess 44 formed by intersecting a radial step surface 441 and a circumferential step surface 442;

still include outer jack catch ring cover 3, interior jack catch ring cover 6 and ring cover spring 8:

the inner hole of the inner jaw ring sleeve 6 is equal in diameter, the inner wall of the inner hole is slidably sleeved on the outer wall of the third section 103 of the mandrel 1, an annular boss 601 is arranged on the periphery of the inner jaw ring sleeve 6, a ring sleeve spring 8 is sleeved on the inner jaw ring sleeve 6, the left end of the ring sleeve spring 8 abuts against the right side face of the annular boss 601, and the right end of the ring sleeve spring 8 abuts against a second piston annular stop 723;

the inner wall of the hole of the outer jaw ring sleeve 3 is slidably sleeved with the outer peripheral surface of the annular boss 601 of the inner jaw ring sleeve 6, the outer peripheral surface of the outer jaw ring sleeve 3 is provided with external threads which are fixedly connected with the internal threads arranged at the th part 71 of the piston through hole in a threaded manner, and the left end surface of the outer jaw ring sleeve 3 can be connected with the second annular stop 35 in a butting manner;

an annular blocking shoulder 301 protruding towards the hole center is further arranged on the inner wall of the hole at the left end of the outer jaw ring sleeve 3, a gap is reserved between the inner wall surface of the annular blocking shoulder 301 of the outer jaw ring sleeve 3 and the outer wall of the third section 103 of the mandrel 1 for the tail of the jaw 4 to pass through, a gap is reserved between the annular blocking shoulder 301 of the outer jaw ring sleeve 3 and the annular boss 601 of the inner jaw ring sleeve 6 for clamping and accommodating the annular bulge 43 at the tail end of the jaw 4, the left end of the inner jaw ring sleeve 6 positioned at the left side of the annular boss 601 extends into the annular recess 44 at the tail end of the jaw 4, and the left end of the inner jaw ring sleeve 6 can abut against the radial step surface 441 of the annular recess 44 of the jaw 4;

preferably, the right side surface of the annular shoulder 301 is a radial taper surface matching the left radial taper surface 431 of the jaw annular protrusion 43;

as shown in fig. 1 and fig. 2, the tail end of each jaw assembly 400 of the jaw 4 may be correspondingly abutted and matched with the jaw annular protrusion 43, the annular recess 44, the annular shoulder 301, the left end of the inner jaw annular sleeve 6, and the like, to serve as a supporting rotation point for the jaw assembly 400 to perform angular deflection; and under the elastic force of the ring sleeve spring 8, the inner jaw ring sleeve 6 can be adjusted in an elastic sliding manner, so that the closing, retracting or opening and expanding of each jaw assembly 400 are smoother and synchronous, and a better connecting and blocking effect is ensured.

The invention relates to a structure principle and operation steps of a quick connector for a high-pressure thin-wall hole, which are as follows:

1. as shown in fig. 1, the left mandrel 1 and the jaw 4 of the connector are inserted into the hole 23 on the sample piece 22 to be tested until the left mandrel and the jaw 4 are close to each other, then the handle 17 is rotated to the position shown in the state two (fig. 2) by taking the hinge pin 18 as the axis, at this time, the connecting rod 13 drives the mandrel 1 to move towards the right side of the connector, the th section 101 at the left end of the mandrel 1 supports the inner wall, namely the radial conical surface 42, at the left side of the jaw 4, so that the jaw 4 is opened, then the left side wall 411 of the jaw groove 41 buckles the left side wall of the hole 23 on the sample piece 22 to be tested, when the mandrel 1 moves rightwards until the mandrel step 28 abuts against the second piston annular stopper 723 of the piston, the mandrel 1 continues to move rightwards under the driving of the connecting rod 13, and simultaneously drives the piston 7 to move rightwards, so that the step drives the jaw 4 to move rightwards, and the;

2. the internal thread of the medium inlet on the outer sleeve 5 can be connected with other threads, when a pressure medium enters the cavity 32 through the thread opening 31, is further carried out, the pressure medium enters the inner part 34 of the cavity to be measured through the split gap 33 on the clamping jaw 4, and at the moment:

a, the filled high-pressure medium can act on the second annular stop 35 and the annular stop 36 on the outer sleeve 5 leftwards, and the outer sleeve 5 presses the O-shaped ring 2 to generate pressure for leftwards displacement through the step 30;

b, the high-pressure medium forms a rightward acting force on the outer jaw ring sleeve 3, steps are carried out, the jaw 4 is driven to move rightwards through the outer jaw ring sleeve 3, steps are carried out, the sample piece 22 to be detected is driven to move leftwards through the jaw 4, and steps squeeze the O-shaped ring 2 to move rightwards through the right side wall of the sample piece 22 to be detected;

the two points a and b are combined, when the pressure of the filled medium is higher, the extrusion force on the O-shaped ring is higher, and the sealing is more reliable;

when the test is finished, the handle 17 is rotated to the position shown in the state along the hinge pin 18, at the moment, the connecting rod 13 is displaced leftwards under the action of the connecting rod spring 14, the spindle 1 is further driven to be displaced leftwards by , when the connecting rod 13 moves to the third annular stop 20 of the outer sleeve 5, the O ring 2 at the jaw groove 41 at the left side of the jaw 4 restrains the jaw 4, the left side of the jaw 4 contracts and closes towards the center direction of the spindle 1 under the restraint of the O ring 2, at the moment, the connector is pulled out from the round hole 23 to be tested of the sample piece 22 to be tested, and all the test steps are finished.

The left side of the piston 7 and the outer sleeve 5 form a sealing cavity 32, the cavity 32 is communicated with the medium hole 31, when the medium pressure rises, the piston 7 is pushed rightwards, the clamping jaws 4 retract rightwards in the cavity of the outer sleeve 5 under the action of the piston 7, the outer sleeve 5 and the sample piece to be tested 22 extrude the O-shaped ring 2 in steps, the sealing performance is improved in steps, the larger the pressure of the cavity 32 is, the better the sealing effect is, the larger the medium pressure in the cavity is, the better the sealing performance is, and the connecting performance is also improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.