Novel structure of ball valve air tightness testing machine

Abstract

The utility model relates to ball valve airtight test machine novel structure technical field, specifically disclose ball valve airtight test machine novel structure, including C type structure seat, be equipped with fixed module on C type structure seat, the inside fixed module is equipped with upper end presser foot and lower end presser foot, fixed module control upper end presser foot and lower end presser foot clamping fixed test flange formula ball valve, fixed module outside is equipped with gas path control module, the inside gas path control module is equipped with flange plate and two inlet gas paths, and gas path control module controls gas path intercommunication to carry out upper and lower chamber independent pressure maintaining test to test flange formula ball valve. The utility model discloses when using, through the bidirectional symmetry pressure structure and the modularization presser foot design of setting, ensure the even sealing of ball valve flange mouth, improve the stability and precision of test pressure, can quickly adapt to different specifications flange simultaneously, and its distributed independent gas path system more realizes the test of upper and lower chamber respectively, accurate positioning leakage position, simplifies the fault diagnosis process.

Description

Technical Field

[0001] This utility model relates to the technical field of novel structures for ball valve airtightness testing machines, specifically to a novel structure for ball valve airtightness testing machines. Background Technology

[0002] As a key component in industrial pipeline systems for controlling fluid flow, the sealing performance of ball valves directly affects the safety and reliability of the entire system. Therefore, in fields such as petroleum, chemical, and natural gas, which involve high-pressure, flammable, explosive, or toxic media, ball valves must undergo rigorous airtightness testing before leaving the factory. An airtightness testing machine is a specialized testing device used to simulate the working state of a ball valve. By filling it with gas at a certain pressure and detecting the pressure retention, it determines whether the valve's sealing performance meets the design requirements.

[0003] Traditional ball valve air tightness testing machines generally employ a unidirectional pressure structure. When testing the sealing of large-diameter flange ball valves, pressure in one direction can easily lead to a leak at the other flange end, resulting in unreliable test results. Traditional testing methods typically only pressurize the entire ball valve, making it difficult to quickly determine whether the leak is located at the upper flange end, lower flange end, or inside the ball valve body when a leak is detected, thus complicating fault diagnosis and product repair. Therefore, we propose a novel structure for our ball valve air tightness testing machine. Utility Model Content

[0004] The purpose of this invention is to provide a novel structure for a ball valve airtightness testing machine, in order to solve the problem mentioned in the background art that pressure in one direction can easily lead to poor sealing of the flange at the other end of the ball valve, resulting in leakage and unreliable test results. Traditional testing methods can usually only pressurize the entire ball valve, and when leakage is found, it is impossible to quickly determine whether the leakage point is located at the upper flange end, the lower flange end, or inside the ball valve body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel structure for a ball valve airtightness testing machine, comprising: a C-shaped structural base, a fixing module on the C-shaped structural base, an upper pressure plate and a lower pressure plate inside the fixing module, the fixing module controlling the upper pressure plate and the lower pressure plate to clamp and fix the test flange ball valve, and an air path control module outside the fixing module, the air path control module having two air inlet paths inside, the air path control module controlling the air path connection to perform independent pressure holding tests on the upper and lower chambers of the test flange ball valve.

[0006] The fixed module includes a lifting cylinder fixedly connected to the top of the C-shaped structure base. The lifting cylinder is fixedly connected to a push rod. The top of the C-shaped structure base has a movable through hole. The push rod is movably connected to the movable through hole. An upper pressure plate is fixedly connected to the bottom of the push rod. A lower pressure plate is fixedly connected to the middle surface of the C-shaped structure base. Both the upper and lower pressure plates are fixedly connected to flanges.

[0007] The air circuit control module includes an upper pressure plate inlet air circuit fixedly connected to the middle of the upper pressure plate. The upper pressure plate inlet air circuit is fixedly connected inside the upper pressure plate and extends out from the side. An upper pressure plate inlet balloon valve is fixedly connected to the middle section of the upper pressure plate inlet air circuit. An upper air circuit pressure gauge is fixedly connected to the front end of the upper pressure plate inlet balloon valve. A lower pressure plate inlet air circuit is fixedly connected to the middle of the lower pressure plate. The lower pressure plate inlet air circuit is fixedly connected inside the lower pressure plate and extends out from the side. A lower pressure plate inlet balloon valve is fixedly connected to the middle section of the lower pressure plate inlet air circuit. A lower air circuit pressure gauge is fixedly connected to the front end of the lower pressure plate inlet balloon valve.

[0008] The C-shaped structural seat has reinforcing ribs at the inner corners.

[0009] The flange is equipped with a sealing ring.

[0010] The upper and lower pressure plates have rounded edges.

[0011] This utility model has at least the following beneficial effects:

[0012] In use, this utility model ensures uniform sealing of the ball valve flange through its bidirectional symmetrical pressure structure and modular pressure plate design, improving the stability and accuracy of the test pressure. It can also quickly adapt to flanges of different specifications. Its distributed independent gas circuit system enables separate testing of the upper and lower chambers, accurately locating the leakage point, simplifying the fault diagnosis process, and optimizing the technical issues of sealing uniformity, adaptation flexibility, and leakage point location accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the fixing module of this utility model;

[0015] Figure 3 This is a schematic diagram of the gas path control module of this utility model;

[0016] Figure 4 This is a schematic diagram of the lower part of the gas path control module of this utility model.

[0017] In the diagram: 1. C-shaped structure seat; 2. Fixed module; 21. Lifting cylinder; 22. Push rod; 23. Movable through hole; 24. Upper pressure plate; 25. Lower pressure plate; 26. Flange; 3. Air circuit control module; 31. Upper pressure plate air inlet circuit; 32. Upper pressure plate air inlet valve; 33. Upper air circuit pressure gauge; 34. Lower pressure plate air inlet circuit; 35. Lower pressure plate air inlet valve; 36. Lower air circuit pressure gauge; 4. Reinforcing rib; 5. Sealing ring; 6. Rounded corner. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] Please see Figure 1-4 This utility model provides a technical solution: a novel structure for a ball valve airtightness testing machine, comprising: a C-shaped structure base 1, a fixing module 2 on the C-shaped structure base 1, an upper pressure plate 24 and a lower pressure plate 25 inside the fixing module 2, the fixing module 2 controlling the upper pressure plate 24 and the lower pressure plate 25 to clamp and fix the test flange ball valve, and an air path control module 3 outside the fixing module 2, the air path control module 3 having two air inlet paths inside, the air path control module 3 controlling the air path connection to perform independent pressure holding tests on the upper and lower chambers of the test flange ball valve. During operation, the flange ball valve to be tested is first placed on the lower pressure plate 25, then the fixing module 2 is started, driving the upper pressure plate 24 and the lower pressure plate 25 to move towards each other until the flanges at both ends of the ball valve are tightly pressed between the upper and lower pressure plates, forming an initial seal. According to the test requirements, the air path control module 3 can control the two air inlet paths to fill the upper and lower chambers of the ball valve with test gas separately or simultaneously, thereby realizing independent pressure holding tests of the chambers or synchronous pressure holding tests of the whole.

[0021] The fixed module 2 includes a lifting cylinder 21 fixedly connected to the top of the C-shaped structural base 1. The lifting cylinder 21 is fixedly connected to a push rod 22. The top of the C-shaped structural base 1 has a movable through hole 23. The push rod 22 is movably connected to the movable through hole 23. The bottom of the push rod 22 is fixedly connected to an upper pressure plate 24. The middle surface of the C-shaped structural base 1 is fixedly connected to a lower pressure plate 25. Both the upper pressure plate 24 and the lower pressure plate 25 are fixedly connected to flanges 26. After receiving a signal, the lifting cylinder 21 is activated, pushing the push rod 22 downward along the movable through hole 23, which drives the upper pressure plate 24 to press down and tighten the upper flange of the ball valve to be tested. The lower pressure plate 25 remains fixedly supported. Through the cooperation of the upper and lower pressure plates and flanges 26, the ball valve is firmly clamped. After the test is completed, the lifting cylinder 21 moves in the opposite direction, lifting the upper pressure plate 24, and the tested ball valve can be removed.

[0022] The air circuit control module 3 includes an upper pressure plate inlet air passage 31 fixedly connected to the middle of the upper pressure plate 24. The upper pressure plate inlet air passage 31 is fixedly connected inside the upper pressure plate 24 and extends out from the side. An upper pressure plate inlet balloon valve 32 is fixedly connected to the middle section of the upper pressure plate inlet air passage 31. An upper air circuit pressure gauge 33 is fixedly connected to the front end of the upper pressure plate inlet balloon valve 32. A lower pressure plate inlet air passage 34 is fixedly connected to the middle of the lower pressure plate 25. The lower pressure plate inlet air passage 34 is fixedly connected to the inside of the lower pressure plate 25 and extends out from the side. A lower pressure plate inlet air passage 34 is fixedly connected to the middle section of the lower pressure plate inlet air passage 34. Balloon valve 35, with a lower pressure plate inlet balloon valve 35 having a lower air path pressure gauge 36 fixedly connected to its front end. When the upper chamber sealing test is required, the upper pressure plate inlet balloon valve 32 is opened, and the test gas enters the upper chamber through the upper pressure plate inlet air path 31. The sealing performance is judged by observing the change in the reading of the upper air path pressure gauge 33. The lower chamber test process is similar, conducted independently through the lower pressure plate inlet balloon valve 35 and the control air path. If an overall test is required, the upper and lower inlet balloon valves are opened simultaneously to achieve synchronous pressurization and pressure holding in both chambers. The upper and lower pressure gauges are monitored independently, facilitating accurate location of the leak.

[0023] Example 2

[0024] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the inner corner of the C-shaped structural seat 1 is provided with a reinforcing rib 4. This structure significantly improves the overall rigidity of the frame, resists deformation under high-pressure testing conditions, and ensures the stability of the pressure application process and the accuracy of the test data. The flange 26 is provided with a sealing ring 5. This design forms a flexible seal between the pressure plate and the flange end face of the ball valve under test, enhances the airtightness of the interface, prevents the leakage of test gas, and ensures the reliability of the high-pressure test. The edges of the upper pressure plate 24 and the lower pressure plate 25 are both machined with rounded corners 6. This eliminates sharp burrs and avoids the risk of operators being scratched during clamping, improving the safety of the equipment. On the other hand, it also helps to disperse the stress of the pressure plate itself and reduces fatigue damage caused by stress concentration.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel structure for a ball valve airtightness testing machine, comprising: The C-type structure seat is characterized in that: a fixing module is provided on the C-type structure seat, the fixing module has an upper pressure plate and a lower pressure plate inside, the fixing module controls the upper pressure plate and the lower pressure plate to clamp and fix the test flange ball valve, and an air path control module is provided on the outside of the fixing module, the air path control module has two air inlet paths inside, the air path control module controls the air path to connect and perform independent pressure holding tests on the upper and lower chambers of the test flange ball valve.

2. The novel structure of the ball valve airtightness testing machine according to claim 1, characterized in that: The fixing module includes a lifting cylinder fixedly connected to the top of the C-shaped structural base. The lifting cylinder is fixedly connected to a push rod. The top of the C-shaped structural base has a movable through hole. The push rod is movably connected to the movable through hole. An upper pressure plate is fixedly connected to the bottom of the push rod. A lower pressure plate is fixedly connected to the middle surface of the C-shaped structural base. Both the upper and lower pressure plates are fixedly connected to flanges.

3. The novel structure of the ball valve airtightness testing machine according to claim 2, characterized in that: The air circuit control module includes an upper pressure plate inlet air circuit fixedly connected to the middle of the upper pressure plate. The upper pressure plate inlet air circuit is fixedly connected inside the upper pressure plate and extends out from the side. An upper pressure plate inlet balloon valve is fixedly connected to the middle section of the upper pressure plate inlet air circuit. An upper air circuit pressure gauge is fixedly connected to the front end of the upper pressure plate inlet balloon valve. A lower pressure plate inlet air circuit is fixedly connected to the middle of the lower pressure plate. The lower pressure plate inlet air circuit is fixedly connected to the inside of the lower pressure plate and extends out from the side. A lower pressure plate inlet balloon valve is fixedly connected to the middle section of the lower pressure plate inlet air circuit. A lower air circuit pressure gauge is fixedly connected to the front end of the lower pressure plate inlet balloon valve.

4. The novel structure of the ball valve airtightness testing machine according to claim 1, characterized in that: The inner corner of the C-shaped structural base is provided with reinforcing ribs.

5. The novel structure of the ball valve airtightness testing machine according to claim 2, characterized in that: The flange is equipped with a sealing ring.

6. The novel structure of the ball valve airtightness testing machine according to claim 3, characterized in that: The upper and lower pressure plates have rounded edges.

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