CN114813381A

CN114813381A - Rubber expansion joint hydrostatic test blind plate force resisting device

Info

Publication number: CN114813381A
Application number: CN202210748054.0A
Authority: CN
Inventors: 施跃清; 何靖; 王峰
Original assignee: Jiangsu Hongyuan Environmental Protection Technology Co ltd
Current assignee: Jiangsu Hongyuan Environmental Protection Technology Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-07-29
Anticipated expiration: 2042-06-29
Also published as: CN114813381B

Abstract

The invention discloses a rubber expansion joint hydrostatic test blind plate force resisting device which comprises a test bed, wherein a strip-shaped groove is formed in the upper surface of the test bed, a sliding block is connected in the strip-shaped groove in a sliding mode, a return spring is fixedly connected to one side of the sliding block, one end, far away from the sliding block, of the return spring is abutted to the inner wall of the strip-shaped groove, and a blind plate assembly is fixedly connected to the upper end of the sliding block. The invention relates to the technical field of rubber expansion joints, and the strip-shaped groove is matched with a rotating shaft of a spherical head, so that a blind plate component can axially move along with the expansion of the expansion joint after being stressed, and can also rotate by taking the spherical rotating shaft as an axis within a certain range after the expansion joint is stressed and twisted, thereby reducing the limitation on the expansion joint and improving the accuracy of a blind plate resisting force test result.

Description

Rubber expansion joint hydrostatic test blind plate force resisting device

Technical Field

The invention relates to the technical field of rubber expansion joints, in particular to a blind plate force resisting device for a hydraulic test of a rubber expansion joint.

Background

The blind plate force is mainly the internal pressure thrust generated by fluid on the inner wall of the pipeline when the trend of the pipeline is changed, and the thrust generated by increasing the section of the pipeline after the wave-shaped expander is additionally arranged, and when the corrugated compensator and the like compensate the elongation of the pipeline, the expansion joint is stretched firstly because the elastic force of the expansion joint is small, and if the blind plate force is not considered, the expansion joint can be damaged by pulling.

In prior art, traditional experiment blind plate power device generally provides the clamp force by the test bench, and the shutoff to the expansion joint is realized to the cooperation blind plate, and this kind of mode has restricted the deformation of expansion joint, crooked, leads to blind plate power to detect inaccurately, and on the other hand can take place elastic deformation at the expansion joint in the water pressure experimentation, leads to the pipe diameter of expansion joint to change, and then leads to the experimental result to change, and for this reason, we propose a rubber expansion joint water pressure test anti blind plate power device and solve above-mentioned problem.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a blind plate force resisting device for a hydraulic test of a rubber expansion joint.

In order to achieve the purpose, the invention adopts the following technical scheme:

the blind plate force resisting device for the hydraulic test of the rubber expansion joint comprises a test bed, wherein a strip-shaped groove is formed in the upper surface of the test bed, a sliding block is connected in the strip-shaped groove in a sliding mode, a reset spring is fixedly connected to one side of the sliding block, one end, away from the sliding block, of the reset spring is abutted to the inner wall of the strip-shaped groove, and a blind plate assembly is fixedly connected to the upper end of the sliding block;

the blind plate component comprises a vertical rod fixedly connected with the upper surface of the sliding block, a spherical rotating shaft is arranged at the upper end of the vertical rod, a limiting ring is connected onto the spherical rotating shaft in a sliding manner, a supporting frame is fixedly connected onto one side of the limiting ring, a threaded sleeve is fixedly connected onto the upper end of the supporting frame, a limiting bolt is connected into the threaded sleeve in a threaded manner, one end, close to the limiting ring, of the limiting bolt is rotatably connected with a sleeve, a compression spring is fixedly connected into the sleeve, one end, far away from the threaded sleeve, of the compression spring is fixedly connected with a push rod, a rubber sleeve is fixedly sleeved on the side wall of the push rod, one end, far away from the limiting bolt, of the push rod is fixedly connected with a first shell, a second shell is slidably connected onto the inner wall of the first shell, a third shell is slidably connected onto the inner wall of the second shell, a sliding rod is fixedly connected onto one end, close to the push rod, of the third shell, and the side wall of the push rod is rotatably connected with a sliding sleeve, and the sliding sleeve is connected with the sliding rod in a sliding manner, and the blind plate assembly can move along with the deformation of the expansion joint and keep the sealing of the blind plate on the expansion joint.

Preferably, the first shell, the second shell and the third shell have the same structure, the first shell comprises an arc-shaped plate, one end of the arc-shaped plate, far away from the push rod, is fixedly connected with a conical plate which is obliquely arranged, and the side wall of the conical plate is fixedly connected with a sector plate.

Preferably, the inner wall of first casing and second casing has all seted up the T-slot, and T-slot sliding connection has the stopper, with T-slot sliding connection's stopper still rotates with the second casing on the first casing and is connected the setting, with T-slot sliding connection's stopper still rotates with the third casing on the second casing and is connected the setting, the T-slot is located the one side setting that the sector plate is close to the push rod.

Preferably, the limiting block is I-shaped, and two ends of the limiting block are spherical.

Preferably, the track of the T-shaped groove is arc-shaped, and one end of the T-shaped groove is communicated with the guide groove.

Preferably, the side wall fixed connection sleeve of sliding sleeve is equipped with the ratchet, the push rod is close to the side wall fixedly connected with connecting rod of sliding sleeve, and is connected with the latch that matches with the ratchet through the rotation of spring pivot on the connecting rod.

Preferably, the push rod and sheathed tube inner wall sliding connection, and the push rod is close to compression spring's one end fixedly connected with and marks the pole, the groove of stepping down has been seted up to sheathed tube lateral wall, and marks the pole and run through the groove setting of stepping down, and the lateral wall that the sleeve pipe is close to the groove of stepping down is provided with the scale groove.

Preferably, the upper surface of the support frame is fixedly connected with a vertically arranged limiting rod, the lower surface of the sleeve is provided with a clamping groove, and the upper end of the limiting rod is connected with the clamping groove in a sliding manner.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the strip-shaped groove is matched with the spherical head rotating shaft, so that the blind plate assembly can axially move along with the expansion of the expansion joint after being stressed, and can also rotate by taking the spherical rotating shaft as an axis in a certain range after the expansion joint is stressed and twisted, thereby reducing the limitation on the expansion joint and improving the accuracy of a blind plate force resistance test result;

in addition, through being provided with the blind plate subassembly that first casing, second casing, third casing cooperation rubber sleeve constitute, the user is carrying out blind plate power and examining time measuring, inserts the expansion joint with the blind plate subassembly in, can make blind plate subassembly shutoff effect better, and the test result is more accurate.

2. According to the invention, by arranging the conical plate, when the first shell, the second shell, the third shell and the rubber sleeve move in the direction away from the expansion direction after being stressed by water pressure in the expansion joint, the conical plate is matched with the limiting ring, so that the larger the stress of the blind plate is, the larger the clamping force on the expansion joint is, and thus, the test failure and the dirty field environment caused by liquid leakage in the test process are avoided;

in addition, the three fan-shaped plates form a whole blind plate, and only the damaged part can be replaced when a single fan-shaped plate is damaged, so that the replacement cost of equipment is reduced, and the service life of the test blind plate force resisting device is prolonged.

3. According to the blind plate assembly, the T-shaped groove is matched with the limiting block, so that the second shell and the third shell can be limited when a user rotates the second shell and the third shell, a certain guiding effect is achieved, the user can unfold the blind plate assembly more easily, on the other hand, the guide groove is formed in one end of the T-shaped groove, the second shell and the third shell can be driven to move towards the direction far away from the supporting frame through the guide groove, and then the three fan-shaped plates move onto the flat plate to form the integral blind plate.

4. According to the invention, the ratchet wheel is matched with the latch for limiting the sliding sleeve, so that the deformation of the rubber sleeve and the deviation of an experimental result caused by the fact that the fan-shaped plate is pushed by water pressure to move in the water pressure experimental process are avoided, and the specific value of the elastic force can be accurately observed when the tensile force of the compression spring is adjusted by rotating the limiting bolt by arranging the abdicating groove and matching the marking rod, so that the operation is convenient, and the limiting bolt does not need to be excessively screwed.

Drawings

FIG. 1 is a schematic view of the overall structure of a rubber expansion joint hydraulic test blind plate force resisting device provided by the invention;

FIG. 2 is a schematic perspective view of a blind plate force resisting device for a hydraulic test of a rubber expansion joint according to the present invention;

FIG. 3 is a schematic view of the bottom structure of a blind plate force resisting device for a hydraulic test of a rubber expansion joint according to the present invention;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 5 is an enlarged view of the structure at B in FIG. 3;

FIG. 6 is a schematic structural diagram of the first casing, the second casing and the third casing of the device for resisting blind plate force in the hydraulic test of the rubber expansion joint according to the present invention in a folded state;

fig. 7 is a schematic structural view of a first shell of the device for resisting blind plate force in the hydraulic test of the rubber expansion joint.

In the figure: 1. a test bed; 2. a strip-shaped groove; 3. a slider; 4. a return spring; 5. a vertical rod; 6. a spherical rotating shaft; 7. a limiting ring; 8. a support frame; 9. a threaded sleeve; 10. a limit bolt; 11. a sleeve; 12. a compression spring; 13. a push rod; 14. a rubber sleeve; 15. a first housing; 151. an arc-shaped plate; 152. a tapered plate; 153. a sector plate; 16. a second housing; 17. a third housing; 18. a slide bar; 19. a sliding sleeve; 20. a T-shaped slot; 21. a limiting block; 22. a ratchet wheel; 23. a connecting rod; 24. clamping teeth; 25. a marking rod; 26. a yielding groove; 27. a scale groove; 28. a limiting rod; 29. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Referring to fig. 1-7, an anti-blind plate force device for a hydraulic test of a rubber expansion joint comprises a test bed 1, wherein a strip-shaped groove 2 is formed in the upper surface of the test bed 1, a sliding block 3 is connected in the strip-shaped groove 2 in a sliding manner, a reset spring 4 is fixedly connected to one side of the sliding block 3, and one end, far away from the sliding block 3, of the reset spring 4 is abutted to the inner wall of the strip-shaped groove 2;

wherein, the blind plate component comprises a vertical rod 5 fixedly connected with the upper surface of the sliding block 3, the upper end of the vertical rod 5 is provided with a spherical rotating shaft 6, the spherical rotating shaft 6 is connected with a spacing ring 7 in a sliding way, the inner wall of the spacing ring 7 is conical, the conical degree is the same as that of the conical plate 152, one side of the spacing ring 7 is fixedly connected with a support frame 8, the upper end of the support frame 8 is fixedly connected with a threaded sleeve 9, the threaded sleeve 9 is connected with a spacing bolt 10 in a threaded way, one end of the spacing bolt 10 close to the spacing ring 7 is rotatably connected with a sleeve 11, a compression spring 12 is fixedly connected in the sleeve 11, one end of the compression spring 12 far away from the threaded sleeve 9 is fixedly connected with a push rod 13, the side wall of the push rod 13 is fixedly sleeved with a rubber sleeve 14, one end of the push rod 13 far away from the spacing bolt 10 is fixedly connected with a first shell 15, the inner wall of the first shell 15 is connected with a second shell 16 in a sliding way, and the inner wall of the second shell 16 is connected with a third shell 17 in a sliding way, one end of the third shell 17 close to the push rod 13 is fixedly connected with a slide rod 18, the side wall of the push rod 13 is rotatably connected with a slide sleeve 19, the slide sleeve 19 is slidably connected with the slide rod 18, and the blind plate assembly can move along with the deformation of the expansion joint and keep the sealing of the blind plate on the expansion joint.

Further, first casing 15, second casing 16 and third casing 17's structure is the same, first casing 15 includes arc 151, the one end fixedly connected with slope of push rod 13 is kept away from to arc 151 sets up conical plate 152, the lateral wall fixedly connected with sector plate 153 of conical plate 152, this kind of design adopts three identical casing of structure to constitute blind plate and the toper cover that possesses the holding power in the arc cover, be used for water pressure experiment and the tight expansion joint of further clamp after the atress respectively, equipment cost has been reduced simultaneously.

Further, the inner walls of the first casing 15 and the second casing 16 are both provided with T-shaped grooves 20, the T-shaped grooves 20 are slidably connected with limit blocks 21, the limit blocks 21 slidably connected with the T-shaped grooves 20 on the first casing 15 are rotatably connected with the second casing 16, the limit blocks 21 slidably connected with the T-shaped grooves 20 on the second casing 16 are rotatably connected with the third casing 17, and the T-shaped grooves 20 are located on one side of the sector plates 153 close to the push rod 13.

Further, the shape of the limiting block 21 is i-shaped, and both ends of the limiting block 21 are spherical, and the design is used for avoiding the separation of the limiting block 21 from the T-shaped groove 20.

Further, the track of the T-shaped groove 20 is arc-shaped, and one end of the T-shaped groove 20 is communicated with a guide groove, wherein the guide groove is used for driving the second casing 16 and the third casing 17 to move in the direction away from the axis of the expansion joint when the limiting block 21 moves to the end of the T-shaped groove 20, so that the outer edges of the first casing 15, the second casing 16 and the third casing 17 are located on the same arc, and the second casing 16 and the third casing 17 are driven to move in the direction away from the support frame 8, so that the three sector plates 153 move to a flat plate, thereby forming an integral blind plate.

Further, the lateral wall fixed connection cover of sliding sleeve 19 is equipped with ratchet 22, push rod 13 is close to sliding sleeve 19's lateral wall fixedly connected with connecting rod 23, and rotate through the spring pivot on the connecting rod 23 and be connected with the latch 24 that matches with ratchet 22, this kind of design is used for spacing sliding sleeve 19, make first casing 15 at the user through the mode of rotating sliding sleeve 19, second casing 16 and third casing 17 expand the back, avoid it to warp after receiving the water pressure, guarantee the experimental stability of water pressure blind plate power and go on, and after experimental the completion, only need rotate latch 24 and can adjust the position of three casing through sliding sleeve 19 once more.

Further, push rod 13 and sleeve pipe 11's inner wall sliding connection, and push rod 13 is close to compression spring 12's one end fixedly connected with and marks pole 25, the groove of stepping down 26 has been seted up to sleeve pipe 11's lateral wall, and it runs through the groove of stepping down 26 setting to mark pole 25, sleeve pipe 11 is close to the lateral wall in the groove of stepping down 26 and is provided with scale groove 27, this kind of design, it is kept away from similarly with the spring scale, a pulling force when being used for detecting the user and using blind plate subassembly chucking rubber inflation festival, thereby conveniently operate, need not excessively to tighten limit bolt 10.

Further, the upper surface of the support frame 8 is fixedly connected with a vertically arranged limiting rod 28, the lower surface of the sleeve 11 is provided with a clamping groove 29, the upper end of the limiting rod 28 is slidably connected with the clamping groove 29, and the design is used for limiting the sleeve 11 to rotate, so that the scale groove 27 is always aligned with a user, and the operation of the user is facilitated.

In the invention, when a user performs a hydraulic pressure test, after inserting one end of an expansion joint into a limiting ring 7, inserting a rubber sleeve 14, a first shell 15, a second shell 16 and a third shell 17 into the expansion joint, then the user rotates a sliding sleeve 19, the sliding sleeve 19 is matched with a sliding rod 18 to drive the second shell 16 and the third shell 17 to rotate, at the moment, a limiting block 21 slides in a T-shaped groove 20, further controlling the running tracks of the second shell 16 and the third shell 17, when the second shell 16 and the third shell 17 rotate to the position where the limiting block 21 slides in a guide groove, the first shell 15, the second shell 16 and the third shell 17 form a conical shell in the rubber sleeve 14, and when the rubber sleeve 14 is used for avoiding the hydraulic pressure blind plate force test, test water flows out from gaps among the first shell 15, the second shell 16 and the third shell 17, and then the user rotates a limiting bolt 10, the rubber sleeve 14 is driven to move towards the direction of the threaded sleeve 9 by the limiting bolt 10, then the expansion joint is clamped by the outer surface of the conical plate 152 and the inner wall of the limiting ring 7, connecting pieces such as flanges are not needed in the design, the sealing effect is good, the rubber expansion joint can be applied to the rubber expansion joint connected in a welding mode, after a user fixes the expansion joint, high-pressure water is connected to the other end of the expansion joint for testing, in the testing process, the expansion joint extends to drive the sliding block 3 to slide in the strip-shaped groove 2, so that the expansion condition of the expansion joint in the hydraulic testing process is detected after the rubber expansion joint is used, on the other hand, when the four walls of the expansion joint are unevenly stressed or have different strength, the expansion joint can also be twisted and steered, the limiting ring 7 can synchronously move with the expansion joint, a user can conveniently not interfere with the form change of the expansion joint, and the user can conveniently observe and record test data, and when the water pressure is great in the expansion joint, water pressure still can drive rubber sleeve 14 to the direction removal of thread bush 9, and at this moment, the inner wall that taper plate 152 can cooperate spacing ring 7 improves the clamping-force to the expansion joint, avoid greatly and take place elastic deformation at the expansion joint atress, the thickness attenuation of expansion joint leads to the expansion joint to break away from with anti blind plate power device, this kind of water pressure test anti blind plate power device has better suitability to the expansion joint of rubber material, when can guarantee sealed effect, the expansion joint that can not interfere the rubber material after the atress is flexible, the distortion, the circumstances such as turn to and inflation, can provide comparatively accurate test data, and convenient to use, equipment cost is lower, long service life.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The device for resisting the blind plate force in the hydraulic test of the rubber expansion joint comprises a test bed (1) and is characterized in that a strip-shaped groove (2) is formed in the upper surface of the test bed (1), a sliding block (3) is connected in the strip-shaped groove (2) in a sliding mode, a reset spring (4) is fixedly connected to one side of the sliding block (3), one end, far away from the sliding block (3), of the reset spring (4) is abutted to the inner wall of the strip-shaped groove (2), and a blind plate assembly is fixedly connected to the upper end of the sliding block (3);

the blind plate component comprises a vertical rod (5) fixedly connected with the upper surface of a sliding block (3), a spherical rotating shaft (6) is arranged at the upper end of the vertical rod (5), a limiting ring (7) is connected onto the spherical rotating shaft (6) in a sliding manner, a supporting frame (8) is fixedly connected to one side of the limiting ring (7), a threaded sleeve (9) is fixedly connected to the upper end of the supporting frame (8), a limiting bolt (10) is connected to the threaded sleeve (9) in an internal thread manner, a sleeve (11) is rotatably connected to one end, close to the limiting ring (7), of the limiting bolt (10), a compression spring (12) is fixedly connected into the sleeve (11), a push rod (13) is fixedly connected to one end, far away from the threaded sleeve (9), of the compression spring (12), a rubber sleeve (14) is fixedly sleeved on the side wall of the push rod (13), and a first shell (15) is fixedly connected to one end, far away from the limiting bolt (10), is fixedly connected to the push rod (13), the inner wall sliding connection of first casing (15) has second casing (16), and the inner wall sliding connection of second casing (16) has third casing (17), one end fixedly connected with slide bar (18) that third casing (17) are close to push rod (13), the lateral wall of push rod (13) rotate be connected with sliding sleeve (19), and sliding sleeve (19) and slide bar (18) sliding connection set up, the blind plate subassembly can remove and keep the blind plate sealed to the expansion joint along with the deformation of expansion joint.

2. The rubber expansion joint hydraulic test blind spot force resisting device according to claim 1, wherein the first shell (15), the second shell (16) and the third shell (17) are identical in structure, the first shell (15) comprises an arc-shaped plate (151), one end, away from the push rod (13), of the arc-shaped plate (151) is fixedly connected with an obliquely arranged conical plate (152), and a fan-shaped plate (153) is fixedly connected to the side wall of the conical plate (152).

3. The rubber expansion joint hydraulic test blind spot force resisting device according to claim 2, wherein the inner walls of the first casing (15) and the second casing (16) are provided with T-shaped grooves (20), the T-shaped grooves (20) are internally and slidably connected with limit blocks (21), the limit blocks (21) which are slidably connected with the T-shaped grooves (20) on the first casing (15) are further rotatably connected with the second casing (16), the limit blocks (21) which are slidably connected with the T-shaped grooves (20) on the second casing (16) are further rotatably connected with the third casing (17), and the T-shaped grooves (20) are arranged on one side, close to the push rod (13), of the sector plates (153).

4. The rubber expansion joint hydraulic test blind spot force resisting device according to claim 3, wherein the limiting block (21) is in an I shape, and both ends of the limiting block (21) are spherical.

5. The rubber expansion joint hydraulic test blind spot force resisting device according to claim 3, wherein the track of the T-shaped groove (20) is arc-shaped, and one end of the T-shaped groove (20) is communicated with a guide groove.

6. The rubber expansion joint water pressure test blind plate force resisting device according to claim 1, wherein a ratchet wheel (22) is sleeved on a side wall fixed connection sleeve of the sliding sleeve (19), a connecting rod (23) is fixedly connected to a side wall of the push rod (13) close to the sliding sleeve (19), and a latch (24) matched with the ratchet wheel (22) is rotatably connected to the connecting rod (23) through a spring rotating shaft.

7. The rubber expansion joint hydraulic test blind plate force resisting device according to claim 1, wherein the push rod (13) is in sliding connection with the inner wall of the sleeve (11), the marking rod (25) is fixedly connected to one end, close to the compression spring (12), of the push rod (13), the yielding groove (26) is formed in the side wall of the sleeve (11), the marking rod (25) penetrates through the yielding groove (26), and the scale groove (27) is formed in the side wall, close to the yielding groove (26), of the sleeve (11).

8. The rubber expansion joint hydraulic test blind spot force resisting device according to claim 7, wherein a vertically arranged limiting rod (28) is fixedly connected to the upper surface of the supporting frame (8), a clamping groove (29) is formed in the lower surface of the sleeve (11), and the upper end of the limiting rod (28) is slidably connected with the clamping groove (29).