Valve air tightness detection tool

Abstract

The utility model provides a kind of valve air tightness detection tool, comprising: box, partition and detection mechanism;Box has storage cavity, partition is placed in storage cavity, to be separated into two detection cavities with storage cavity, detection mechanism includes lifting mechanism and placing mechanism, placing mechanism includes placing frame and fixed plate, lifting mechanism is used to drive placing frame to move along the height direction of detection cavity, placing frame is equipped with the insertion slot for receiving fixed plate, placing frame is also equipped with the fixed component for locking fixed plate in insertion slot, fixed component is used to lock fixed plate in insertion slot, fixed plate has the installation position for placing valve to be detected.

Description

Technical Field

[0001] This utility model belongs to the technical field of airtightness testing equipment, and in particular relates to a valve airtightness testing fixture. Background Technology

[0002] As a critical component in fluid transport systems, the airtightness of valves directly affects the safety and reliability of the pipeline system. If a valve leaks during use, it can not only lead to media loss but also potentially cause environmental pollution, equipment damage, and even safety accidents. Therefore, airtightness testing of valves before they leave the factory is an essential quality control step.

[0003] There are two main types of existing valve airtightness testing methods: one type uses pressure sensors, flow meters, and other testing equipment to indirectly determine whether the valve is leaking. Although the detection is relatively accurate, the equipment is expensive, the operation is complex, and the testing environment is highly demanding, making it unsuitable for large-scale promotion and use. The other type uses the underwater observation method, which involves inflating the valve and placing it in a water tank, then observing whether bubbles are generated in the water to determine whether the valve is leaking. However, the underwater observation method for valve airtightness testing is inefficient and inconvenient to operate, and cannot quickly and efficiently test the airtightness of valves. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a valve airtightness testing fixture to solve the problems of inconvenience and low efficiency in valve airtightness testing.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A valve airtightness testing fixture includes: a housing, a partition plate, and a testing mechanism;

[0007] The housing has a storage cavity, and the partition plate is placed inside the storage cavity to divide the storage cavity into two detection cavities. The detection mechanism includes a lifting mechanism and a placement mechanism. The placement mechanism includes a placement frame and a fixing plate. The lifting mechanism is used to drive the placement frame to move along the height direction of the detection cavity. The placement frame is provided with a slot for receiving the fixing plate. The placement frame is also provided with a fixing component for locking the fixing plate in the slot. The fixing component is used to lock the fixing plate in the slot. The fixing plate has a mounting position for placing the valve to be tested.

[0008] Furthermore, the lifting mechanism is configured as a cylinder, a slide rail is installed in the detection chamber, a slider is slidably connected on the slide rail, the placement frame is detachably connected to the slider, and a connecting plate for connecting the cylinder telescopic rod is fixedly connected to one end of the placement frame away from the insertion slot.

[0009] Furthermore, the housing is provided with an installation opening that communicates with the detection cavity.

[0010] Furthermore, the fixing assembly includes a fixing seat, a fixing spring, a fixing rod, a sliding ring, a fixing ring, and a fixing block. The fixing seat is fixedly connected to the placement frame and has a fixing cavity and a through hole. The fixing block is fixedly connected to the fixing rod. The placement frame has a through hole communicating with the insertion slot. One end of the fixing block away from the fixing rod extends into the insertion slot through the through hole. The fixing ring is fixedly connected to the fixing rod. The sliding ring is slidably sleeved on the fixing rod. The fixing spring is sleeved on the fixing rod and located between the sliding ring and the fixing ring. One end of the fixing rod away from the fixing block extends out of the fixing cavity through the through hole. The fixing plate has a fixing slot corresponding to the fixing block.

[0011] Furthermore, the fixing block is provided with a guide slope.

[0012] Furthermore, the end of the fixing rod facing away from the fixing block is provided with a pull ring, and the placement frame is provided with a hook.

[0013] Furthermore, a buffer assembly is provided on the bottom surface of the detection cavity. The buffer assembly includes a buffer seat, a buffer spring, a buffer plate, an end plate, and a buffer rod. The buffer seat has a buffer cavity and a buffer hole communicating with the buffer cavity. The buffer rod is fixedly connected to the buffer plate. One end of the buffer rod away from the buffer plate extends through the buffer hole to the outside of the buffer cavity and is fixedly connected to the end plate. The buffer spring is located inside the buffer cavity, with one end connected to the bottom surface of the buffer cavity and the other end connected to the buffer plate.

[0014] Furthermore, the buffer assembly also includes a guide rod, which is fixedly connected to the buffer plate, and the buffer seat also has a guide groove communicating with the buffer cavity, and the guide rod is slidably disposed in the guide groove.

[0015] Furthermore, a handle is provided on the upper surface of the fixing plate, and a support block is provided on the lower surface of the fixing plate.

[0016] Furthermore, the fixing plate is provided with a first guide channel, and the placement frame is provided with a second guide channel.

[0017] Through the above technical solution, the coordinated operation of the lifting mechanism and the placement mechanism enables rapid and efficient testing of the valve to be inspected. The lifting mechanism drives the placement frame to move along the height of the testing chamber, causing the fixed plate carrying the valve to be inspected to rise and fall synchronously with the placement frame. When testing is required, the lifting mechanism drives the placement frame to descend, immersing the valve in the water within the testing chamber. This allows personnel to perform airtightness testing on the valve using underwater observation. Simultaneously, the fixed plate has mounting positions for the valve to be inspected, ensuring its relative position remains unchanged during movement and testing, improving the stability and accuracy of the test. The fixed plate is installed into the insertion slots on the placement frame via a plug-in method, allowing for quick and precise positioning and installation. This facilitates replacement or adjustment when testing valves of different specifications, enhancing the versatility and ease of operation of the tooling. Furthermore, throughout the entire testing process, the valve rises and falls as a single unit with the fixed plate and placement frame, simplifying manual placement and removal steps, reducing operational intensity, and effectively avoiding errors or damage caused by human operation. This achieves rapid, standardized, and reliable valve airtightness testing. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the housing and lifting mechanism provided in an exemplary embodiment of this disclosure;

[0020] Figure 2 This is a schematic diagram of the placement mechanism provided in an exemplary embodiment of the present disclosure, wherein some of the box panels constituting the box body are not shown;

[0021] Figure 3 This is a schematic diagram of the internal structure of the detection cavity provided in an exemplary embodiment of this disclosure, wherein some of the box panels constituting the box body are not shown;

[0022] Figure 4 This is a schematic diagram of the placement frame and fixing plate provided in an exemplary embodiment of this disclosure;

[0023] Figure 5 This is a schematic diagram of the placement frame provided in an exemplary embodiment of this disclosure;

[0024] Figure 6 This is a cross-sectional view of the fixing component provided in an exemplary embodiment of this disclosure;

[0025] Figure 7This is a schematic diagram of the structure of the fixing plate provided in an exemplary embodiment of this disclosure;

[0026] Figure 8 This is a schematic diagram of the structure of the buffer component provided in an exemplary embodiment of this disclosure;

[0027] Figure 9 This is a cross-sectional structural diagram of the buffer component provided in an exemplary embodiment of this disclosure.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Housing; 101. Detection chamber; 102. Mounting opening; 2. Placement frame; 201. Insertion slot; 202. Second guide channel; 3. Fixing plate; 301. Fixing slot; 302. Handle; 303. Support block; 304. First guide channel; 4. Fixing assembly; 401. Fixing seat; 4011. Fixing chamber; 402. Fixing spring; 403. Fixing rod; 404. Sliding ring; 405. Fixing ring; 406. Fixing block; 4061. Guide slope; 5. Connecting plate; 6. Pull ring; 7. Hook; 8. Buffer assembly; 801. Buffer seat; 8011. Buffer chamber; 8012. Guide channel; 802. Buffer spring; 803. Buffer plate; 804. End plate; 805. Buffer rod; 806. Guide rod; 9. Lifting mechanism. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] In the specific embodiments provided in this disclosure, a valve airtightness testing fixture is provided, with reference to... Figures 1 to 9 As shown, the valve airtightness testing fixture includes: a housing 1, a partition plate, and a testing mechanism. The housing 1 has a storage cavity, and the partition plate is placed inside the storage cavity to divide the storage cavity into two testing chambers 101. The testing mechanism includes a lifting mechanism 9 and a placement mechanism. The placement mechanism includes a placement frame 2 and a fixing plate 3. The lifting mechanism 9 is used to drive the placement frame 2 to move along the height direction of the testing chamber 101. The placement frame 2 is provided with a insertion slot 201 for storing the fixing plate 3. The placement frame 2 is also provided with a fixing component 4 for locking the fixing plate 3 in the insertion slot 201. The fixing component 4 is used to lock the fixing plate 3 in the insertion slot 201. The fixing plate 3 has an installation position for placing the valve to be tested.

[0035] Through the above technical solution, the coordinated operation of the lifting mechanism 9 and the placement mechanism enables rapid and efficient testing of the valve to be tested. The lifting mechanism 9 drives the placement frame 2 to move along the height of the testing chamber 101, causing the fixing plate 3 carrying the valve to be tested to rise and fall synchronously with the placement frame 2. When testing is required, the lifting mechanism 9 drives the placement frame 2 to descend, immersing the valve to be tested in the water within the testing chamber 101. This facilitates underwater observation for airtightness testing of the valve. Simultaneously, the fixing plate 3 has mounting positions for the valve to be tested, ensuring its stable placement and ensuring its integrity. Maintaining a constant relative position during movement and testing improves the stability and accuracy of the test. The fixing plate 3 is installed into the insertion slot 201 on the placement frame 2 via a plug-in method, allowing the fixing plate 3 to be quickly and accurately positioned and installed. This facilitates replacement or adjustment when testing valves of different specifications, enhancing the versatility and ease of operation of the tooling. Furthermore, during the entire testing process, the valve to be tested rises and falls together with the fixing plate 3 and the placement frame 2, which not only simplifies the manual placement and removal steps and reduces operational intensity, but also effectively avoids errors or damage caused by human operation, thereby achieving rapid, standardized, and reliable valve airtightness testing.

[0036] Meanwhile, the housing 1 has a storage cavity inside, which is divided into two independent detection cavities 101 by a partition plate. This enables simultaneous detection at multiple workstations or in multiple batches, improving detection efficiency and avoiding cross-interference and misjudgment during the detection process. It is suitable for rapid detection needs in mass production processes. For example, there can be multiple partition plates. Multiple partition plates can divide a storage cavity into two or more detection cavities 101. Each detection cavity 101 is independent of each other and does not affect the others.

[0037] In some embodiments, the receiving cavity is divided into multiple detection chambers 101 by setting multiple partitions, for example, into six detection chambers 101. The detection process based on the six detection chambers 101 can significantly improve the process flow and batch processing capability of the detection fixture. That is, in actual use, the operator can install the valve to be tested on the mounting position of the fixed plate 3, and control the placement frame 2 on which it is located to descend through the lifting mechanism 9, so that the valve to be tested is sequentially immersed in the water in each detection chamber 101. Since airtightness testing usually requires the valve to be immersed in water for a certain period of time before observing whether bubbles are generated to determine its sealing performance, the setting of multiple detection chambers 101 allows the operator to form a continuous operating rhythm. For example, after the first valve is placed into the first detection chamber 101 and begins to soak, the operator can continue to place and immerse the second to sixth valves in sequence. When the sixth valve is placed, the pre-soaking time of the first valve has reached the detectable state, and it can then be observed whether it produces bubbles. This detection process greatly improves detection efficiency and avoids the time wasted due to waiting in traditional single-chamber operations.

[0038] In some implementations, reference Figure 1 and Figure 3 As shown, the lifting mechanism 9 is specifically configured as a cylinder structure to achieve smooth lifting and lowering of the placement frame 2 within the detection chamber 101. To ensure the guidance and stability of the placement mechanism during the lifting process, a slide rail is provided inside the detection chamber 101, and a slider is slidably connected to the slide rail. The placement frame 2 is detachably connected to the slider, so that the placement frame 2 always moves along the guide of the slide rail during the lifting process, avoiding problems such as inaccurate detection or unstable valve position caused by offset or shaking.

[0039] Meanwhile, a connecting plate 5 is fixedly connected to one end of the placement frame 2 away from the insertion slot 201. The connecting plate 5 is connected to the telescopic rod of the cylinder. When the cylinder is driven, the telescopic rod drives the connecting plate 5 to rise or fall, thereby realizing the synchronous lifting and lowering movement of the placement frame 2, the fixed plate 3 installed on it, and the valve to be tested.

[0040] In some implementations, reference Figure 1As shown, the housing 1 is provided with an installation opening 102 that communicates with the detection chamber 101. The installation opening 102 facilitates the installation or removal of the fixing plate 3 by the testing personnel from the outside. Through the installation opening 102, the operator can quickly replace the fixing plate 3 placed in the detection chamber 101 without disassembling the overall structure of the housing 1, thereby improving the operational convenience and efficiency of the testing tool during use.

[0041] In some implementations, reference Figures 4 to 7 As shown, the fixing assembly 4 includes a fixing base 401, a fixing spring 402, a fixing rod 403, a sliding ring 404, a fixing ring 405, and a fixing block 406. The fixing base 401 is fixed to the placement frame 2 and has a fixing cavity 4011 and a through hole. The fixing block 406 is fixed to the fixing rod 403. The placement frame 2 has a through hole communicating with the insertion slot 201. One end of the fixing block 406 away from the fixing rod 403 extends into the insertion slot 201 through the through hole. The fixing ring 405 is fixed to the fixing rod 403. The sliding ring 404 is slidably sleeved on the fixing rod 403. The fixing spring 402 is sleeved on the fixing rod 403 and located between the sliding ring 404 and the fixing ring 405. One end of the fixing rod 403 away from the fixing block 406 extends out of the fixing cavity 4011 through the through hole. The fixing plate 3 has a fixing slot 301 corresponding to the fixing block 406.

[0042] Specifically, when the fixing plate 3 is inserted into the insertion slot 201, the end of the fixing block 406 extending into the insertion slot 201 will be inserted into the fixing slot 301 of the fixing plate 3, thereby locking and fixing the fixing plate 3, thus preventing the fixing plate 3 from coming out of the insertion slot 201 due to vibration or water flow during the testing process. At the same time, the fixing spring 402 is set between the sliding ring 404 and the fixing ring 405. The fixing spring 402 can provide the necessary elastic force to ensure that the fixing block 406 is always inserted into the fixing slot 301 under the action of elastic force, thereby enhancing the stability of the fixing plate 3.

[0043] In some implementations, reference Figure 6As shown, the fixing block 406 is provided with a guide slope 4061. That is, the guide slope 4061 is used to optimize the insertion process of the fixing plate 3. When the inspector gradually inserts the fixing plate 3 into the insertion slot 201 of the frame 2, the fixing plate 3 will first come into contact with the guide slope 4061 on the surface of the fixing block 406. At this time, under the action of the slope, the fixing block 406 will also move upward without the inspector lifting the fixing rod 403. After the fixing slot 301 moves to the bottom of the fixing block 406, the fixing block 406 will automatically rebound and fall into the fixing slot 301 under the elastic force of the fixing spring 402, thus completing the fixing action. The setting of the guide slope 4061 makes the insertion process of the fixing plate 3 smoother and improves the assembly efficiency of the fixing plate 3.

[0044] In some implementations, reference Figures 4 to 6 As shown, a pull ring 6 is provided at the end of the fixing rod 403 facing away from the fixing block 406, and a hook 7 is provided on the placement frame 2. The cooperation between the pull ring 6 and the hook 7 can improve the ease of disassembly after the inspection is completed. That is, to reduce the burden on the inspection personnel to continuously pull the fixing rod 403, after the fixing block 406 is disengaged from the fixing slot 301, the pull ring 6 can be hooked onto the hook 7 for temporary fixation. At this time, the fixing rod 403 is held in the lifted state, and the inspection personnel do not need to continue to apply force. At this time, the fixing block 406 is in the disengaged position and will not interfere with the subsequent plate pulling action. Subsequently, the inspection personnel can directly pull the fixing plate 3 to remove it smoothly from the insertion slot 201, completing the entire linkage unloading process of the valve and the fixing plate 3.

[0045] Meanwhile, the pull ring 6 also helps inspectors to more easily lift the fixing rod 403.

[0046] In some implementations, reference Figure 4 and Figure 7 As shown, the upper surface of the fixing plate 3 is provided with a handle 302, and the lower surface of the fixing plate 3 is provided with a support block 303. The handle 302 helps the testing personnel to install the fixing plate 3 or remove the fixing plate 3 from the placement frame 2 more conveniently. The support block 303 can reduce the friction between the fixing plate 3 and the placement frame 2. Since the fixing plate 3 will be immersed in water during the testing process, if the friction between the fixing plate 3 and the placement frame 2 is too large, it will be inconvenient for the testing personnel to remove the fixing plate 3.

[0047] Meanwhile, the fixing plate 3 is provided with a first guide channel 304, and the placement frame 2 is provided with a second guide channel 202. The first guide channel 304 and the second guide channel 202 ensure that the fixing plate 3 and the placement frame 2 descend more smoothly. That is, during the descent of the fixing plate 3 and the placement frame 2, the water in the detection chamber 101 can flow freely through the first guide channel 304 and the second guide channel 202, avoiding water flow from hindering the normal descent of the fixing plate 3 and the placement frame 2.

[0048] In some implementations, reference Figures 4 to 6 As shown, a buffer assembly 8 is provided on the bottom surface of the detection chamber 101. The buffer assembly 8 includes a buffer seat 801, a buffer spring 802, a buffer plate 803, an end plate 804, and a buffer rod 805. This buffer assembly 8 is used to reduce and absorb the impact force that may be generated when the placement frame 2 descends, ensuring the stability and safety of the detection fixture during use. Specifically, the buffer seat 801 is provided on the bottom surface of the detection chamber 101. The buffer seat 801 has a buffer cavity 8011 and a buffer hole communicating with the buffer cavity 8011. The buffer rod 805 is fixed to the buffer plate 803 and the buffer rod 805 is positioned away from the buffer plate 803. One end of the buffer plate 803 extends through the buffer hole to the outside of the buffer cavity 8011 and is fixedly connected to the end plate 804. The buffer spring 802 is located inside the buffer cavity 8011, with one end of the buffer spring 802 connected to the bottom surface of the buffer cavity 8011 and the other end connected to the buffer plate 803. When the fixed plate 3 and the placement frame 2 descend to the bottom of the detection cavity 101, the end plate 804 contacts the bottom surface of the placement frame 2, thereby causing the buffer plate 803, the end plate 804 and the buffer rod 805 to move down synchronously and compress the buffer spring 802. The elastic force generated by the buffer spring 802 absorbs and mitigates the impact of the fall.

[0049] Meanwhile, a guide rod 806 is fixedly connected to the buffer plate 803, and the buffer seat 801 also has a guide groove 8012 that communicates with the buffer cavity 8011. The guide rod 806 is slidably disposed in the guide groove 8012, so that while the buffer rod 805 drives the buffer plate 803 to move up and down, the guide rod 806 can slide along its axial direction in the guide groove 8012, thereby playing a stable guiding role in the entire buffering process and ensuring the consistency and stability of the movement of the buffer plate 803, the end plate 804 and the buffer rod 805.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve airtightness testing fixture, characterized in that, include: Box body (1), partition plate and detection mechanism; The housing (1) has a storage cavity, and the partition plate is placed in the storage cavity to divide the storage cavity into two detection cavities (101). The detection mechanism includes a lifting mechanism (9) and a placement mechanism. The placement mechanism includes a placement frame (2) and a fixing plate (3). The lifting mechanism (9) is used to drive the placement frame (2) to move along the height direction of the detection cavity (101). The placement frame (2) is provided with a insertion slot (201) for storing the fixing plate (3). The placement frame (2) is also provided with a fixing component (4) for locking the fixing plate (3) in the insertion slot (201). The fixing component (4) is used to lock the fixing plate (3) in the insertion slot (201). The fixing plate (3) has an installation position for placing the valve to be tested.

2. The valve airtightness testing fixture according to claim 1, characterized in that: The lifting mechanism (9) is configured as a cylinder. A slide rail is installed in the detection chamber (101). A slider is slidably connected on the slide rail. The placement frame (2) is detachably connected to the slider. A connecting plate (5) for connecting the cylinder telescopic rod is fixedly connected to one end of the placement frame (2) away from the insertion slot (201).

3. The valve airtightness testing fixture according to claim 1, characterized in that: The housing (1) is provided with an installation opening (102) that communicates with the detection chamber (101).

4. The valve airtightness testing fixture according to claim 1, characterized in that: The fixing assembly (4) includes a fixing base (401), a fixing spring (402), a fixing rod (403), a sliding ring (404), a fixing ring (405), and a fixing block (406). The fixing base (401) is fixed to the placement frame (2) and has a fixing cavity (4011) and a through hole. The fixing block (406) is fixed to the fixing rod (403). The placement frame (2) is provided with a through hole communicating with the insertion slot (201). One end of the fixing block (406) away from the fixing rod (403) extends through the through hole to the... Inside the insertion slot (201), the fixing ring (405) is fixedly connected to the fixing rod (403), the sliding ring (404) is slidably sleeved on the fixing rod (403), the fixing spring (402) is sleeved on the fixing rod (403) and located between the sliding ring (404) and the fixing ring (405), one end of the fixing rod (403) away from the fixing block (406) extends out of the fixing cavity (4011) through the through hole, and the fixing plate (3) is provided with a fixing slot (301) corresponding to the fixing block (406).

5. The valve airtightness testing fixture according to claim 4, characterized in that: The fixing block (406) is provided with a guide slope (4061).

6. The valve airtightness testing fixture according to claim 4, characterized in that: The fixed rod (403) has a pull ring (6) at one end away from the fixed block (406), and the placement frame (2) has a hook (7).

7. The valve airtightness testing fixture according to claim 1, characterized in that: A buffer assembly (8) is provided on the bottom surface of the detection cavity (101). The buffer assembly (8) includes a buffer seat (801), a buffer spring (802), a buffer plate (803), an end plate (804), and a buffer rod (805). The buffer seat (801) has a buffer cavity (8011) and a buffer hole communicating with the buffer cavity (8011). The buffer rod (805) is fixedly connected to the buffer plate (803). One end of the buffer rod (805) away from the buffer plate (803) extends through the buffer hole to the outside of the buffer cavity (8011) and is fixedly connected to the end plate (804). The buffer spring (802) is located inside the buffer cavity (8011), and one end of the buffer spring (802) is connected to the bottom surface of the buffer cavity (8011), and the other end is connected to the buffer plate (803).

8. The valve airtightness testing fixture according to claim 7, characterized in that: The buffer assembly (8) further includes a guide rod (806) which is fixedly connected to the buffer plate (803). The buffer seat (801) also has a guide groove (8012) communicating with the buffer cavity (8011). The guide rod (806) is slidably disposed in the guide groove (8012).

9. The valve airtightness testing fixture according to claim 1, characterized in that: The upper surface of the fixing plate (3) is provided with a handle (302), and the lower surface of the fixing plate (3) is provided with a support block (303).

10. The valve airtightness testing fixture according to claim 1, characterized in that: The fixing plate (3) is provided with a first guide channel (304), and the placement frame (2) is provided with a second guide channel (202).

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