Pressure testing device for pressure-bearing valve

Abstract

The utility model provides a pressure-bearing valve pressure testing device which comprises a testing table, a circular lower plugging plate fixedly arranged at the top of the testing table, an air inlet pipe arranged in the middle of the lower plugging plate, a clamping mechanism arranged on the outer side of the lower plugging plate, and an upper plugging plate arranged above the lower plugging plate and corresponding to the lower plugging plate. A support plate is fixedly arranged at the top of the upper plugging plate, and is provided with a downward pressing driving part for driving the support plate to move up and down; according to the utility model, the clamping driving component drives the rotating ring to rotate in a reciprocating manner, the rotating ring drives one end of the clamping arm to rotate when rotating, and the clamping arm slides on the supporting ring, so that the clamping piece at the other end of the clamping arm is close to or far away from the lower plugging plate, and the end part of a pressure-bearing valve at the top of the lower plugging plate is clamped or released; when the rotating ring rotates, all the clamping arms are driven to move synchronously, the clamping pieces are made to be close to or away from the lower plugging plate synchronously, the center position of the end of the pressure-bearing valve can coincide with the center position of the lower plugging plate during clamping, and accurate clamping and positioning are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve test technical field, concretely relates to a kind of pressure testing device of pressure-bearing valve. BACKGROUND

[0002] Valve failure in high-pressure environment can cause serious accidents, so it is necessary to detect the pressure-bearing capacity of the valve under extreme pressure environment during the production process of pressure-bearing valve to verify the pressure-bearing capacity of the valve.

[0003] In the prior art, the automatic pressure regulating device of the hydraulic valve test bench is disclosed in Chinese utility model patent document with authorization announcement No.CN220960586U, wherein three fixed plates are elastically supported by a group of independent springs respectively, and the elastic force of the three groups of springs inevitably has differences. When the valve is clamped between the fixed plates, the valve end and the pressing disc will be offset due to the different elastic forces around them, which will affect the sealing effect of the valve. Moreover, the valve lower end is elastically supported by springs around, and the stability is poor.

[0004] Therefore, it is necessary to design a pressure testing device of pressure-bearing valve that can stably clamp the lower end of the valve and realize automatic centering during clamping to solve the technical problems currently faced. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model provides a pressure testing device of pressure-bearing valve that can stably clamp the lower end of the valve and realize automatic centering during clamping.

[0006] The technical scheme of the utility model is as follows: a pressure testing device of pressure-bearing valve, comprising a test bench, a circular lower sealing plate is fixedly arranged on the top of the test bench, a gas inlet pipe is arranged in the center of the lower sealing plate, a clamping mechanism is arranged on the outer side of the lower sealing plate, an upper sealing plate corresponding to the lower sealing plate is arranged above the lower sealing plate, a support plate is fixedly arranged on the top of the upper sealing plate, a lower pressing driving part for driving the upper and lower movement of the support plate is arranged on the support plate; the clamping mechanism has a support ring concentrically sleeved on the outer side of the lower sealing plate, a rotating ring is concentrically sleeved on the outer side of the support ring, the support ring is fixedly arranged on the top of the test bench, the rotating ring is rotationally arranged on the top of the test bench, a clamping driving part for driving the rotation of the rotating ring is rotationally arranged on the test bench, at least three clamping arms are arranged in circumferential array on the top of the rotating ring, one end of the clamping arm is rotationally connected with the rotating ring, the clamping arm is slidably connected with the support ring, and a clamping piece is arranged on the top of the end of the clamping arm away from the rotating ring.

[0007] The clamping piece has a support shaft fixedly arranged vertically on the top of the clamping arm, and a support cylinder is rotationally and slidably sleeved on the outer side of the support shaft.

[0008] The bottom end of the supporting cylinder is provided with a groove, a spring is sleeved outside the supporting shaft between the groove and the clamping arm, and the top end of the supporting shaft is fixedly provided with an upper baffle.

[0009] The bottom end of the supporting cylinder is provided with an outer baffle, and an outer sleeve is sleeved outside the supporting cylinder above the outer baffle.

[0010] The outer sleeve is a cylindrical structure made of polyurethane.

[0011] The clamping arm is provided with a sliding groove, a sliding rod is slidably arranged in the sliding groove, the sliding rod is vertically and fixedly arranged at the top of the supporting ring, and a limiting plate is fixedly arranged at the end of the sliding rod above the clamping arm.

[0012] The bottom of the rotating ring is rotatably arranged on the top of the test table through a rotary support.

[0013] The pressing driving part is fixedly arranged above the test table through a supporting frame, and the pressing driving part is a hydraulic cylinder.

[0014] One end of the clamping driving part is rotatably connected with the top of the test table, the other end of the clamping driving part is provided with a driving arm, the driving arm is rotatably connected with the rotating ring, and the clamping driving part is a hydraulic cylinder.

[0015] The utility model discloses the beneficial effect:

[0016] (1) in the utility model, the clamping driving part drives the rotating ring to rotate reciprocating, and the rotating ring drives one end of the clamping arm to rotate when rotating, one end of the clamping arm is in rotation, and the clamping arm itself slides on the supporting ring, so that the clamping piece of the other end of the clamping arm is close to or away from the lower sealing plate, and the clamping or release of the pressure-bearing valve end portion on the top of the lower sealing plate is realized.

[0017] (2) when the rotating ring rotates, all the clamping arms are driven to move synchronously, and then the clamping piece at the end of the clamping arm is close to or away from the lower sealing plate synchronously, so that the center position of the pressure-bearing valve end portion and the center position of the lower sealing plate coincide when clamping, accurate clamping and positioning are realized. DETAILED DESCRIPTION

[0018] Fig. 1 It is the structure schematic view of the pressure-bearing valve pressure test device in the utility model.

[0019] Fig. 2 It is the structure schematic view of the clamping mechanism in the utility model.

[0020] Fig. 3 It is the structure schematic view of the clamping piece in the utility model. Detailed Implementation

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0022] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figs. 1 to 3 As shown, the pressure testing device for a pressure-bearing valve includes a test bench 1. A circular lower sealing plate 2 is fixedly installed on the top of the test bench 1. An air inlet pipe 3 is centrally located on the lower sealing plate 2. A clamping mechanism 4 is located on the outer side of the lower sealing plate 2. A corresponding upper sealing plate 7 is located above the lower sealing plate 2. A support plate 8 is fixedly installed on the top of the upper sealing plate 7. A downward pressure driving component 6 is installed on the support plate 8 to drive its up and down movement. During the test, one end of the pressure-bearing valve abuts against the lower sealing plate 7 and is clamped and fixed by the clamping mechanism 4. The downward pressure driving component 6 drives the support plate 8 and the upper sealing plate 7 to move downward, sealing the other end of the pressure-bearing valve through the upper sealing plate 7. At this time, a gas medium at a certain pressure (usually 1.1 times the design pressure) can be introduced into the pressure-bearing valve through the air inlet pipe 3. The pressure is maintained for at least five minutes, and the valve body of the pressure-bearing valve is observed for deformation or leakage. Fig. 2As shown, the clamping mechanism 4 has a support ring 42 concentrically sleeved outside the lower blocking plate 2, the outer side of the support ring 42 is sleeved with a rotating ring 41, the support ring 42 is fixedly arranged on the top of the test table 1, the test table 1 is rotationally arranged with a clamping driving part 47 for driving the rotating ring 41 to rotate, the rotating ring 41 is rotationally arranged on the top of the test table 1, and the top of the rotating ring 41 is provided with at least three clamping arms 43 in a circumferential array, one end of the clamping arm 43 is rotationally connected with the rotating ring 41, the clamping arm 43 is slidingly connected with the support ring, and the top of the other end of the clamping arm 43 away from the rotating ring is provided with a clamping piece 46; the clamping driving part 47 drives the rotating ring 41 to rotate reciprocally, the rotating ring 41 drives one end of the clamping arm 43 to rotate when rotating, and the clamping arm 43 itself slides on the support ring 42 when the one end of the clamping arm 43 rotates, so that the clamping piece 46 at the other end of the clamping arm 43 approaches or moves away from the lower blocking plate 2, and the clamping or release of the end part of the pressure-bearing valve on the top of the lower blocking plate 2 is realized; the rotating ring 41 drives all the clamping arms 43 to move synchronously when rotating, and then the clamping piece 46 at the end part of the clamping arm 43 approaches or moves away from the lower blocking plate 2 synchronously, so that the center position of the end part of the pressure-bearing valve can coincide with the center position of the lower blocking plate 2 when clamping, and accurate clamping and positioning are realized.

[0024] In some embodiments, the clamping piece 46 has a support shaft 461 fixedly arranged vertically on the top of the clamping arm 43, and the outer side of the support shaft 461 is rotationally and slidingly sleeved with a support cylinder 462, the support cylinder 462 is rotationally and slidingly sleeved on the outer side of the support shaft 461 in the process of clamping and releasing, so that the friction between the pressure-bearing valve and the clamping piece 46 can be reduced.

[0025] In some embodiments, the bottom end of the support cylinder 462 is concentrically provided with a groove 463, the outer side between the groove 463 and the clamping arm 43 is sleeved with a spring 466, and the top end of the support shaft 461 is fixedly provided with an upper baffle plate 464; in the process that the upper blocking plate 7 presses the pressure-bearing valve, the lower blocking plate 2 will be deformed under the action of pressure, the lower end of the pressure-bearing valve will move downward, the support cylinder 462 and the lower end of the pressure-bearing valve abut against each other, the support cylinder 462 can move downward with the lower end of the pressure-bearing valve, the spring 466 is compressed, and the friction between the pressure-bearing valve and the clamping piece 46 can be reduced; when the clamping piece 46 releases the lower end of the pressure-bearing valve, the spring 466 is reset and pushes the support cylinder 462 to reset.

[0026] In some embodiments, the bottom end of the support cylinder 462 is fixedly provided with an outer baffle 467, and the outer side of the support cylinder 462 above the outer baffle 467 is sleeved with an outer sleeve 465, so that the outer sleeve 465 can avoid damaging the lower end of the pressure-bearing valve; specifically, the outer sleeve 465 is a cylindrical structure made of polyurethane material, and the polyurethane material has excellent wear resistance.

[0027] In some embodiments, a sliding groove 44 is formed on the clamping arm 43, a sliding rod is slidably arranged in the sliding groove 44, and the sliding rod is vertically fixed on the top of the supporting ring 42, and a limiting plate 45 is fixed on the end of the sliding rod above the clamping arm 43.

[0028] In some embodiments, the bottom of the rotating ring 41 is rotatably arranged on the top of the test table 1 through a slewing bearing.

[0029] In some embodiments, the pressing driving component 6 is fixedly arranged above the test table 1 through a supporting frame 5, and the pressing driving component 6 is a hydraulic cylinder; specifically, the supporting frame 5 is an L-shaped plate structure, and one end of the supporting frame 5 is vertically fixed on the top of the test table 1.

[0030] In some embodiments, one end of the clamping driving component 47 is rotatably connected with the top of the test table 1, the other end of the clamping driving component 47 is provided with a driving arm 48, and the driving arm 48 is rotatably connected with the rotating ring 41; the clamping driving component 47 is a hydraulic cylinder.

[0031] So far, the embodiments of the utility model have been described in detail. In order to avoid shielding the concept of the utility model, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0032] The above-described embodiments only express some implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A pressure testing device for pressure-containing valves, characterized in that: The utility model provides a test platform, the top of test platform is fixedly provided with circular lower plugging plate, the lower plugging plate is provided with air inlet pipe in the middle, the outer side of lower plugging plate is provided with clamping mechanism, the upper side of lower plugging plate is provided with the upper plugging plate corresponding therewith, the top of upper plugging plate is fixedly provided with support plate, support plate is provided with lower pressure driving part that drives its up and down movement, clamping mechanism has the support ring concentrically sleeved on the outer side of lower plugging plate, the outer side of support ring is provided with swivel ring concentrically, support ring is fixedly arranged on the top of test platform, swivel ring is rotatably arranged on the top of test platform, test platform is rotatably provided with clamping driving part that drives the rotation of swivel ring, the top of swivel ring is provided with at least three clamping arms in circumferential array, one end of clamping arm is rotatably connected with swivel ring, clamping arm is slidably connected with support ring, the top of one end of clamping arm away from swivel ring is provided with clamping piece.

2. The pressure test device of claim 1, wherein: The clamping piece has a support shaft fixedly arranged vertically on the top of the clamping arm, and a support cylinder rotatably and slidably sleeved on the outer side of the support shaft.

3. The pressure test device of claim 2, wherein: A groove is concentrically formed in the bottom end of the support cylinder, a spring is sleeved on the outer side of the support shaft between the groove and the clamping arm, and an upper stop plate is fixedly arranged on the top end of the support shaft.

4. The pressure test assembly of claim 2, wherein: An outer stop flange is fixedly arranged on the outer side of the bottom end of the support cylinder, and an outer sleeve is sleeved on the outer side of the support cylinder above the outer stop flange.

5. The pressure test device of claim 4, wherein: The outer sleeve is a cylindrical structure made of polyurethane material.

6. The pressure test assembly of claim 1, wherein: A sliding groove is formed in the clamping arm, a sliding rod is slidably arranged in the sliding groove, the sliding rod is fixedly arranged vertically on the top of the support ring, and a limiting plate is fixedly arranged on the end of the sliding rod above the clamping arm.

7. The pressure test assembly of claim 1, wherein: The bottom of the swivel ring is rotatably arranged on the top of the test platform through a rotary support.

8. The pressure test assembly of claim 1, wherein: The lower pressure driving part is fixedly arranged above the test platform through a support frame, and the lower pressure driving part is a hydraulic cylinder.

9. The pressure test assembly of claim 1, wherein: One end of the clamping driving part is rotatably connected with the top of the test platform, the other end of the clamping driving part is provided with a driving arm rotatably connected with the swivel ring, and the clamping driving part is a hydraulic cylinder.

Images