A sealing detection mechanism and a valve testing device containing the mechanism.

Abstract

This invention relates to the field of testing equipment technology, specifically to a sealing testing mechanism and a valve testing device containing the mechanism. The device includes a sealing testing machine component assembly, which provides a testing platform and performs displacement control and multi-directional testing on a dual electromagnetic shut-off valve body. The sealing testing machine component assembly includes a machine body, which is equipped with a worktable and high / low pressure measuring and control instruments. Bottom guide rails are symmetrically connected to the worktable. This invention integrates horizontal and vertical testing functions, allowing a single device to complete tests in all directions. Utilizing the mechanical displacement interlock between the long air passage ring and the sealing airbag ring, it achieves a coordinated operation of "first backflushing and cleaning, then double sealing," ensuring accurate testing and protecting the instrument.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a sealing testing mechanism and a valve testing device containing the mechanism. Background Technology

[0002] Dual electromagnetic shut-off valves are critical safety control components in gas, chemical, and thermal energy systems, and their sealing performance directly affects the operational safety of the system. During the manufacturing process, it is usually necessary to conduct internal and external leakage tests on the valve body at multiple angles (horizontal and vertical directions).

[0003] However, existing seal detection devices have the following drawbacks in practical applications: The testing process is discontinuous and inefficient: valve bodies often retain residual cleaning fluid or mechanical debris after assembly or cleaning. Existing testing equipment typically requires manual cleaning or a separate purging process before clamping onto the testing table. This not only increases process time but may also cause secondary contamination during handling.

[0004] Limited sealing reliability: Traditional testing fixtures often use a single end-face gasket. Due to potential machining tolerances, burrs, or uneven pressure on the valve body flange surface, relying solely on end-face tightening can easily lead to "false leaks," resulting in decreased testing accuracy.

[0005] Insufficient protection for precision instruments: During the switching between purging and testing, if residual media (such as liquid) flows back into the high and low pressure measuring and control instruments with the airflow, it will damage the sensors and cause the instrument's accuracy to drift, affecting the service life of the equipment.

[0006] Poor adaptability: Existing devices often can only perform single-direction testing. For testing requirements such as dual electromagnetic shut-off valves that need to simulate multiple installation positions (horizontal, vertically upward, vertically downward), multiple clamping and switching are often required, which is cumbersome and has low repeatability positioning accuracy. Summary of the Invention

[0007] In order to overcome the above-mentioned technical problems, the present invention aims to provide a sealing detection mechanism and a valve testing device containing the mechanism, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A sealing detection mechanism and a valve testing device containing the mechanism are disclosed for multi-directional airtightness and leakage value detection of a dual electromagnetic shut-off valve body. The mechanism includes: a sealing detection machine component assembly for providing a testing platform and performing displacement control and multi-directional detection on the dual electromagnetic shut-off valve body. The sealing detection machine component assembly includes a body with a worktable and a high / low pressure measuring and control instrument. A bottom guide rail is symmetrically connected to the worktable, and an upper plate is slidably connected to the bottom guide rail. A telescopic component is connected to the upper plate, and a vent is connected to the working end of the telescopic component. A vertical bottom vent is also connected to the worktable, and a vertical cylinder is connected to the body for vertical detection in conjunction with the vertical bottom vent. A backflushing and sealing component assembly is also disclosed for dynamically flushing and multiple sealing of the ports of the dual electromagnetic shut-off valve body in conjunction with the sealing detection machine component assembly. The backflushing and sealing component assembly includes a fixed component and a moving component slidably connected within the fixed component.

[0009] Preferably, the fixed component includes a base and a fixed cylinder, the fixed cylinder has a cavity, the cavity has a long air passage ring, and the fixed cylinder has an air inlet for supplying air to the cavity.

[0010] Preferably, the moving component includes an inner moving cylinder that is slidably connected within the fixed cylinder. The inner moving cylinder has a venting groove ring at the position corresponding to the long venting ring. An end piece is connected to one end of the inner moving cylinder away from the base. A sealing ring for contacting the end face of the dual electromagnetic shut-off valve body is connected to the outer edge of the end piece.

[0011] Preferably, the inner moving cylinder slides axially relative to the fixed cylinder under the pushing action of the telescopic member, so that the venting groove ring and the long venting channel ring form an air passage connection or an air passage disconnection during the detection stroke.

[0012] Preferably, a sealing airbag ring is also fitted onto the end piece. The sealing airbag ring is used to fit against the inner wall of the port of the dual electromagnetic shut-off valve body after expansion, forming a second seal relative to the sealing rubber ring.

[0013] Preferably, the end of the fixed cylinder away from the base has multiple sets of fixed air nozzle shells arranged in a ring shape, and a sealing ball is provided inside the fixed air nozzle shell. The sealing ball is connected to the fixed air nozzle shell by a spring.

[0014] Preferably, the end piece is connected to an end nozzle, and a top rod is connected inside the end nozzle via a bracket. The end nozzle is connected to the sealing airbag ring via a venting tube.

[0015] Preferably, the push rod moves with the inner moving cylinder and is used to push open the sealing ball so that the cavity of the fixed cylinder communicates with the end nozzle and supplies air to the sealing airbag ring.

[0016] Preferably, the end of the end piece extends into the port of the dual electromagnetic shut-off valve body, and a preset gap is provided between the end piece and the inner wall of the dual electromagnetic shut-off valve body.

[0017] Preferably, a control cylinder is provided on the side of the upper plate platform. The control cylinder is used to drive the upper plate platform to move axially along the bottom guide rail to adjust the distance between the dual electromagnetic shut-off valve body and the backflushing and sealing component assembly.

[0018] Preferably, the vent is connected to a silicone gasket, and the silicone gasket is connected to an external air supply device. The bottom vent is also provided with a sealing gasket for sealing the port of the dual electromagnetic shut-off valve.

[0019] Preferably, the high and low pressure measuring and control instrument is connected to the air nozzle, the bottom air vent, and the vertical cylinder on the base via air pipes, and the working end of the vertical cylinder is connected to a vertical plug for sealing the top of the valve body.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the design of the backflushing and sealing component assembly, the relative displacement of the moving and stationary cylinders integrates backflushing and formal testing into the same mechanical stroke. Before the seal is tightened, the airflow automatically enters the valve body for backflushing, removing residual media and ensuring the cleanliness of the testing environment without the need for additional manual cleaning procedures. 2. This device employs a dual protection system consisting of an end-face sealing ring and an internal sealing airbag ring. The sealing ring provides the first layer of physical compression sealing; while the sealing airbag ring, triggered by a push rod, expands within the valve body to form a second, flexible seal. This "internal and external linkage" sealing method effectively offsets the effects of machining tolerances and surface roughness at the valve ports, eliminating false detections caused by improper clamping. 3. By employing the misalignment logic between the venting groove ring and the long venting channel ring, and the mechanical cooperation between the sealing ball and the push rod, the linkage between the closure of the purge air path and the inflation and opening of the airbag is achieved. This purely mechanical timing control replaces the complex solenoid valve control logic, reducing the failure rate and improving the synchronicity of the response. 4. The design of the end fitting, with its end extending into the valve port and maintaining a certain drop, forms a physical anti-overflow barrier. Combined with prior backflushing, this physically cuts off the path for residual media to flow into the high and low pressure monitoring and control instruments, extending the maintenance cycle and service life of the testing instruments. 5. The device integrates horizontal testing (sealing test machine component group) and vertical testing (vertical cylinder component, vertical bottom vent component) functions, so that one set of equipment can complete tests in all directions. Through the sliding alignment of the upper plate and the flexible pressing of the telescopic component, rapid clamping and accurate testing are achieved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the backflush and sealing component assembly of the present invention; Figure 3 This is a schematic cross-sectional view of the backflush and sealing component assembly of the present invention. Figure 1 ; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A; Figure 5 This is a schematic cross-sectional view of the backflush and sealing component assembly of the present invention. Figure 2 ; Figure 6 For the present invention Figure 5 A schematic diagram of the structure at point B.

[0022] In the diagram: 01. Dual electromagnetic shut-off valve body; 02. Sealing tester component assembly; 21. Machine body; 22. Bottom guide rail; 23. Upper platform; 24. Telescopic component; 25. Vent nozzle component; 26. Vertical cylinder component; 27. Vertical bottom vent component; 03. Backflush and sealing component assembly; 31. Fixed component; 311. Base; 312. Fixed cylinder component; 313. Long vent ring; 314. Fixed nozzle shell; 315. Sealing ball; 32. Moving component; 321. Inner moving cylinder component; 322. Vent groove ring; 323. End component; 324. Sealing airbag ring; 325. End nozzle; 326. Push rod; 327. Sealing rubber ring. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] One embodiment provided by the present invention: refer to Figure 1 As shown, a sealing detection mechanism and a valve testing device containing the mechanism include a dual electromagnetic shut-off valve body 01, which further includes: Sealing inspection machine component group 02 and backflushing and sealing component group 03.

[0025] The sealing test machine component assembly 02 includes a body 21, which includes a worktable and a high and low pressure measuring and control instrument. A bottom guide rail 22 is connected to the worktable. Two sets of bottom guide rails 22 are symmetrically connected to the worktable. An upper plate 23 is slidably connected to the bottom guide rail 22. A control cylinder is provided on the side of the upper plate 23. The control cylinder is used to control the position of the upper plate 23 on the bottom guide rail 22. A telescopic component 24 is connected to the upper plate 23. A venting nozzle 25 is connected to the working end of the telescopic component 24. The telescopic component 24 can control the movement of the venting nozzle 25 along the direction of the upper plate 23 by an external cylinder. A silicone sealing gasket is connected to the venting nozzle 25. A vertical bottom venting component 27 is also connected to the worktable. A vertical cylinder 26 is connected to the body 21. A vertical plug is connected to the working end of the vertical cylinder 26.

[0026] refer to Figures 2-6 As shown, the backflushing and sealing component assembly 03 includes a fixed component 31 and a moving component 32.

[0027] The fixed component 31 includes a base 311, an air nozzle connected to the base 311, a fixed cylinder 312 connected to the base 311, a cavity provided inside the fixed cylinder 312, a long air passage ring 313 provided in the cavity, an inflation nozzle connected to the fixed cylinder 312, a fixed air nozzle shell 314 provided at one end of the fixed cylinder 312 away from the base 311, multiple sets of fixed air nozzle shells 314 are provided, and the multiple sets of fixed air nozzle shells 314 are distributed in a ring on the fixed cylinder 312, a sealing ball 315 is provided inside the fixed air nozzle shell 314, and the sealing ball 315 is connected to the fixed air nozzle shell 314 by a spring.

[0028] The moving component 32 includes an inner moving cylinder 321, which is slidably connected inside the fixed cylinder 312. An airtight rubber ring is directly provided between the inner moving cylinder 321 and the fixed cylinder 312. A venting groove ring 322 is provided on the inner moving cylinder 321 at the position corresponding to the long venting channel ring 313. An end piece 323 is connected to the end of the inner moving cylinder 321 away from the base 311. A sealing ring 327 is connected to the outside of the end piece 323. The sealing ring 327 is used to contact the port of the dual electromagnetic shut-off valve body 01.

[0029] A sealing airbag ring 324 is also sleeved on the end piece 323. The surface of the sealing airbag ring 324 contacts the inner wall of the port of the dual electromagnetic shut-off valve body 01. An end nozzle 325 is connected to the end piece 323. A push rod 326 is connected to the end nozzle 325 through a bracket. The push rod 326 contacts the sealing ball 315. A vent pipe is connected between the end nozzle 325 and the sealing airbag ring 324.

[0030] It should be noted that the silicone gasket connected to the vent 25 is connected to an external air supply device, and the bottom vent 27 is also connected to a sealing gasket to seal the port of the dual electromagnetic shut-off valve body 01. The high and low pressure measuring and control instrument inside the dual electromagnetic shut-off valve body 01 is connected to the air pipe on the base 311, the bottom vent 27 and the vertical cylinder 26 through the air pipe.

[0031] The end part of the end piece 323 extends into the port of the dual electromagnetic shut-off valve body 01, and maintains a certain gap with the inner wall of the dual electromagnetic shut-off valve body 01, creating a drop, so that even in subsequent gas detection, the medium present inside is not easily flowed into the end piece 323 under the action of airflow.

[0032] Working principle: 1. Initial clamping and alignment: During testing, the dual electromagnetic shut-off valve body 01 is first placed on the upper platform 23. One end of the dual electromagnetic shut-off valve body 01 initially contacts the silicone gasket on the vent 25. At this time, the telescopic component 24 is in a retracted state, and the silicone gasket only makes initial contact with the end of the dual electromagnetic shut-off valve body 01, without forming a complete airtight seal. Subsequently, by controlling the control cylinder corresponding to the bottom guide rail 22, the upper platform 23 and its load, including the telescopic component 24, the vent 25, and the dual electromagnetic shut-off valve body 01, are driven to move synchronously along the bottom guide rail 22, so that the other end of the dual electromagnetic shut-off valve body 01 is precisely aligned with the backflushing and sealing component assembly 03.

[0033] 2. Dynamic backflushing pretreatment (residual media removal): The telescopic component 24 is activated, pushing the dual electromagnetic shut-off valve body 01 to continue axial displacement towards the backwash and sealing component assembly 03. During this process (refer to...), Figure 3 The end of the dual electromagnetic shut-off valve body 01 is in contact with the sealing ring 327.

[0034] At this time, the air inlet connected to the fixed cylinder 312 continuously supplies air into the cavity. The gas enters the inner moving cylinder 321 through the long air passage ring 313 and the air groove ring 322 in sequence, and is finally sprayed into the double electromagnetic shut-off valve body 01 through the port. This airflow reverses the flow of residual media (such as cleaning fluid, debris, etc.) that may be present in the double electromagnetic shut-off valve body 01. Impurities are smoothly discharged from the other end of the double electromagnetic shut-off valve body 01 (i.e., the end that is not completely sealed with the air inlet 25) with the airflow, ensuring the cleanliness of the testing environment.

[0035] 3. Progressive dual sealing and gas path switching: As the telescopic component 24 continues to advance, the recoil and sealing component assembly 03 is... Figure 3 State transformation Figure 5At this point, the moving inner cylinder 321 is displaced relative to the stationary cylinder 312, causing misalignment between the venting groove ring 322 and the long venting channel ring 313, automatically cutting off the backflush purging air path. Simultaneously: First seal: The end face of the dual electromagnetic shut-off valve body 01 forms a compression seal with the sealing ring 327.

[0036] Second seal (airbag linkage): The moving push rod 326 overcomes the spring resistance and pushes open the sealing ball 315, making the cavity of the fixed cylinder 312 connected with the end nozzle 325. Gas enters the sealing airbag ring 324 through the vent pipe, causing it to expand and tightly adhere to the inner wall of the port of the dual electromagnetic shut-off valve body 01, forming a highly reliable inner diameter seal.

[0037] At the same time, the vent 25 at the other end, under the continuous pushing of the telescopic component 24, achieves a completely tight fit with the opening of the dual electromagnetic shut-off valve body 01.

[0038] 4. Sealing performance test: After sealing, test gas is injected into the dual electromagnetic shut-off valve body 01 through the vent 25. The operator alternately controls the opening and closing of the two valve ports within the dual electromagnetic shut-off valve body 01 via the electronic control system. If leakage occurs, the gas will collect at the backflushing and sealing assembly 03 and be introduced into the high and low pressure monitoring instrument through the vent on the base 311. By analyzing the pressure change data, the internal and external leakage values ​​of the dual electromagnetic shut-off valve body 01 in a horizontal state can be determined.

[0039] After the horizontal test is completed, the dual electromagnetic shut-off valve body 01 is removed and placed vertically, with its bottom opening contacting and sealing the vertical bottom vent 27 on the worktable. Then, the vertical cylinder 26 is activated, driving its working end's vertical plug downwards to press and seal the top opening of the dual electromagnetic shut-off valve body 01. By controlling the air intake states of the vertical plug and the vertical bottom vent 27, and the coordinated action of the two sets of valve ports within the dual electromagnetic shut-off valve body 01, the vertical sealing performance test is completed.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A sealing detection mechanism and a valve testing device containing the mechanism, used for multi-directional airtightness and leakage value detection of a dual electromagnetic shut-off valve body, characterized in that, include: A sealing testing machine component assembly is used to provide a testing platform and perform displacement control and multi-directional testing on a dual electromagnetic shut-off valve body. The sealing testing machine component assembly includes a machine body, which is equipped with a worktable and a high and low pressure measuring and control instrument. A bottom guide rail is symmetrically connected to the worktable, and an upper plate is slidably connected to the bottom guide rail. A telescopic component is connected to the upper plate, and a vent is connected to the working end of the telescopic component. A vertical bottom vent is also connected to the worktable, and a vertical cylinder is connected to the machine body for vertical testing in conjunction with the vertical bottom vent. The backflushing and sealing component assembly is used in conjunction with the sealing tester component assembly to dynamically flush and perform multiple sealing on the ports of the dual electromagnetic shut-off valve body. The backflushing and sealing component assembly includes a fixed component and a moving component that is slidably connected within the fixed component.

2. The sealing detection mechanism and valve testing device containing the mechanism according to claim 1, characterized in that: The fixed component includes a base and a fixed cylinder. The fixed cylinder has a cavity inside, and a long air passage ring is provided inside the cavity. The fixed cylinder is provided with an air inlet for supplying air to the cavity.

3. The sealing detection mechanism and valve testing device containing the mechanism according to claim 2, characterized in that: The moving component includes an inner moving cylinder that is slidably connected within a fixed cylinder. The inner moving cylinder has a venting groove ring at a position corresponding to the long venting ring. An end piece is connected to one end of the inner moving cylinder away from the base. A sealing ring for contacting the end face of the dual electromagnetic shut-off valve body is connected to the outer edge of the end piece.

4. The sealing detection mechanism and valve testing device containing the mechanism according to claim 3, characterized in that: The internal moving cylinder slides axially relative to the fixed cylinder under the pushing action of the telescopic component, so that the venting groove ring and the long venting channel ring form an air passage connection or an air passage disconnection during the detection stroke.

5. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 4, characterized in that: The end piece is also fitted with a sealing airbag ring, which is used to fit against the inner wall of the port of the dual electromagnetic shut-off valve body after expansion, forming a second seal relative to the sealing rubber ring.

6. The sealing detection mechanism and valve testing device containing the mechanism according to claim 5, characterized in that: The fixed cylinder component has multiple sets of fixed air nozzle shells arranged in a ring at the end away from the base. Each fixed air nozzle shell is provided with a sealing ball, which is connected to the fixed air nozzle shell by a spring.

7. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 6, characterized in that: The end piece is connected to an end nozzle, and a top rod is connected inside the end nozzle via a bracket. The end nozzle is connected to the sealing airbag ring via a venting tube.

8. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 7, characterized in that: The push rod moves with the inner moving cylinder and is used to push open the sealing ball so that the cavity of the fixed cylinder communicates with the end nozzle and supplies air to the sealing airbag ring.

9. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 3, characterized in that: The end of the end piece extends into the port of the dual electromagnetic shut-off valve body, and a preset gap is provided between the end piece and the inner wall of the dual electromagnetic shut-off valve body.

10. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 1, characterized in that: A control cylinder is provided on the side of the upper plate platform. The control cylinder is used to drive the upper plate platform to move axially along the bottom guide rail to adjust the distance between the double electromagnetic shut-off valve body and the backflush and sealing component assembly.

11. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 1, characterized in that: The vent is connected to a silicone gasket, which is connected to an external air supply device. The bottom vent is also provided with a sealing gasket for sealing the port of the dual electromagnetic shut-off valve.

12. A sealing detection mechanism and a valve testing device containing the mechanism according to claim 1, characterized in that: The high and low pressure measuring and control instrument is connected to the air nozzle, the bottom air vent, and the vertical cylinder on the base through air pipes. The working end of the vertical cylinder is connected to a vertical plug for sealing the top of the valve body.

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