Seal face print inspection tool

Abstract

The application provides a sealing surface indentation inspection tool, which comprises a mounting shell, a valve shaft, a valve core connector, an elastic member and a locking assembly; the mounting shell has a mounting space inside, and the top of the mounting space has a mounting channel; the valve shaft sequentially passes through the mounting channel and the mounting space; the valve core connector is located below the mounting shell and is connected with the bottom of the valve shaft; the elastic member is used for providing elastic force for the downward movement of the valve shaft; the locking assembly is arranged on one side of the mounting shell, and has a locking end which can abut against the valve shaft to limit the displacement of the valve shaft in the up-down direction. The sealing surface indentation inspection tool provided by the application can ensure that the valve core is vertically dropped under the driving force of the elastic member, is perfectly centered with the valve seat, can accurately simulate the sealing working condition of the valve during actual work, and improves the acceptance reliability.

Description

Technical Field

[0001] This application belongs to the field of valve inspection technology, specifically relating to a tool for inspecting seal marks. Background Technology

[0002] In the power and chemical industries, when gate valves or stop valves experience internal leakage, the sealing surfaces must be ground to inspect the marks left by the compression of the valve core and seat sealing surfaces, in order to verify the valve's tightness.

[0003] The traditional method of pressing the valve core and seat sealing surfaces involves striking the valve core with a copper rod or other tools after it comes into contact with the seat, creating an imprint. However, due to misalignment of the valve core or off-center striking, the imprint is prone to distortion and breakage, affecting the grinding and acceptance of the sealing surfaces. This often requires multiple pressing tests to achieve acceptance, leading to low inspection efficiency. Another method involves reassembling the valve, using a pneumatic (or electric) actuator to control the valve opening and closing, pressing the valve core and seat sealing surfaces, and then disassembling the valve to observe the imprint. This method requires valve disassembly, resulting in significant waste of manpower and resources and high inspection costs. Utility Model Content

[0004] This application provides a sealing surface imprint inspection tool to solve the technical problems in the prior art where the imprint position of the valve core is easily offset, requiring repeated tests for inspection, which affects inspection efficiency and accuracy; and the high cost of using valve reassembly and disassembly.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A tool for inspecting imprints on a sealing surface is provided, comprising: The mounting housing has an internal mounting space extending vertically, and the top of the mounting space has a mounting channel communicating with the outside. The valve shaft passes sequentially from top to bottom through the mounting channel and the mounting space, with the bottom end of the valve shaft extending out of the mounting space; A valve core connector is located below the mounting housing and is connected to the bottom of the valve shaft. The valve core connector is used to connect the valve core. An elastic element, disposed within the mounting space, is used to provide an elastic force for the downward movement of the valve shaft; and A locking assembly is disposed on one side of the mounting housing. The locking assembly has a locking end that moves radially along the valve shaft. The locking end can abut against the valve shaft to limit the displacement of the valve shaft in the vertical direction.

[0006] In one possible implementation, a locking hole is provided on the outer periphery of the valve shaft corresponding to the locking end, and the locking end is inserted into the locking hole to restrict the displacement of the valve shaft in the vertical direction.

[0007] In one possible implementation, a connecting seat is installed on the bottom outer periphery of the mounting housing, and the connecting seat has a mounting hole for connecting with the valve body.

[0008] In one possible implementation, the top end of the valve shaft extends through the mounting housing and is connected to a grip handle.

[0009] In one possible implementation, a guide hole is also provided on the bottom side of the mounting housing, the guide hole extends vertically, and the guide hole communicates with the mounting space; The sealing surface imprint inspection tool also includes a guide member, which passes through the guide hole and connects to the bottom end of the valve shaft. The guide member slides in the guide hole to limit the displacement distance of the valve shaft in the vertical direction.

[0010] In one possible implementation, the locking component includes: A locking seat is installed on the top side of the mounting housing, and the locking seat has a locking space inside; A locking rod, radially slidable through the locking seat along the mounting channel, has an abutment plate on its outer periphery. The outer peripheral surface of the abutment plate slides against the inner wall of the locking space. The end of the locking rod facing the valve shaft forms the locking end. A locking reset component is sleeved on the locking rod, and both ends of the locking reset component abut against the abutment plate and the locking seat, respectively. The locking reset component is configured with a preload force to push the abutment plate toward the mounting housing.

[0011] In one possible implementation, the inner diameter of the mounting channel is smaller than the inner diameter of the mounting space; The valve shaft has a connecting protrusion in the middle, the diameter of which is larger than that of the valve shaft. The outer periphery of the connecting protrusion slides against the inner wall of the mounting space. The two ends of the elastic element abut against the top of the connecting protrusion and the top of the mounting space, respectively.

[0012] In one possible implementation, the guide includes an integrally cast limiting arm and a limiting protrusion. The limiting arm passes through the guide hole and is screwed to the valve shaft, with the central axis of the limiting arm parallel to the radial direction of the valve shaft. The limiting protrusion is mounted on the end of the limiting arm and is used to engage with a tool to drive the limiting arm to rotate.

[0013] In a possible implementation, the inner edge of the bottom end of the mounting housing has a first inclined surface that gradually slopes outward from top to bottom; the top of the valve core connector is provided with a second inclined surface corresponding to the first inclined surface, and the second inclined surface is vertically attached to the first inclined surface.

[0014] In a possible implementation, the bottom of the valve shaft is provided with a connecting rod, and the outer circumference of the connecting rod is provided with an external thread; the top of the valve core connector is provided with a thread groove corresponding to the external thread, and the thread groove is screwed with the connecting rod.

[0015] Compared with the prior art, the sealing surface imprint inspection tool provided by the present application adopts a rigid structure composed of a mounting housing and a valve shaft, combined with the precise connection of the valve core connector, ensures that the valve core drops vertically under the driving force of the elastic member, is perfectly aligned with the valve seat, effectively avoids sealing line deflection and line breakage, and greatly improves inspection efficiency. The tool does not require complete reinstallation of the valve and the actuator, and can be quickly docked with the valve body through the simplified mounting housing, which eliminates the cumbersome steps of disassembling and reinstalling the valve, reduces the input of manpower and material resources, and lowers the inspection cost. The constant, vertical closing force provided by the elastic member can accurately simulate the sealing working condition of the valve during actual operation. Compared with the instantaneous force generated by traditional knocking and the complicated process of reinstallation inspection, the obtained sealing imprint can more truly reflect the sealing performance of the valve, greatly improve the acceptance reliability, and avoid the situation that the imprint is qualified but internal leakage occurs after operation. The valve core connector can be adapted to valve cores of different specifications, and the structural design of the mounting housing can be compatible with a variety of valve bodies, which broadens the application scope of the tool. Description of Drawings

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required for the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a structural schematic diagram of the sealing surface imprint inspection tool provided in the embodiment of the present application; Figure 2 is a front view of the sealing surface imprint inspection tool provided in the embodiment of the present application; Figure 3 is a side view of the sealing surface imprint inspection tool provided in the embodiment of the present application; Figure 4 is a side sectional view of the sealing surface imprint inspection tool provided in the embodiment of the present application; Figure 5 is an assembly sectional schematic diagram of the valve core connector and the valve shaft adopted in the embodiment of the present application.

[0018] Explanation of reference numerals in the attached figures: 1. Mounting housing; 11. Mounting space; 12. Mounting channel; 13. Connecting seat; 131. Mounting hole; 14. Guide hole; 15. First inclined surface; 2. Valve shaft; 21. Locking hole; 22. Grip handle; 23. Connecting protrusion; 24. Connecting rod; 3. Valve core connector; 31. Second bevel; 32. Threaded groove; 4. Elastic components; 5. Locking assembly; 51. Locking seat; 52. Locking rod; 521. Abutment plate; 53. Locking reset component; 6. Guide component; 61. Limiting arm; 62. Limiting protrusion. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0024] Please refer to the following: Figures 1 to 5 The sealing surface imprint inspection tool provided in this application is described below. The sealing surface imprint inspection tool includes a mounting housing 1, a valve shaft 2, a valve core connector 3, an elastic element 4, and a locking assembly 5. The mounting housing 1 has a mounting space 11 extending in the vertical direction inside, and the top of the mounting space 11 has a mounting channel 12 communicating with the outside. The valve shaft 2 passes through the mounting channel 12 and the mounting space 11 sequentially from top to bottom, and the bottom end of the valve shaft 2 extends out of the mounting space 11. The valve core connector 3 is located below the mounting housing 1 and is connected to the bottom of the valve shaft 2. The valve core connector 3 is used to connect the valve core. The elastic element 4 is disposed in the mounting space 11 and is used to provide elastic force for the valve shaft 2 to move downward. The locking assembly 5 is disposed on one side of the mounting housing 1. The locking assembly 5 has a locking end that moves radially along the valve shaft 2. The locking end can abut against the valve shaft 2 to limit the displacement of the valve shaft 2 in the vertical direction.

[0025] In practice, red lead powder and other developing agents are evenly applied to the valve core sealing surface. The valve core is then connected and fixed to the bottom of the valve shaft 2 via the valve core connector 3. The mounting housing 1 is positioned and aligned with the valve body to ensure that the mounting housing 1 and the valve body are relatively fixed. The valve shaft 2 is pulled upward, causing the elastic element 4 to compress and store energy. After the valve shaft 2 moves to the preset position, the locking end of the locking assembly 5 moves radially along the valve shaft 2 and abuts against the valve shaft 2, restricting the vertical displacement of the valve shaft 2 and maintaining the energy storage state of the elastic element 4. The restriction of the valve shaft 2 by the locking assembly 5 is released, and the elastic element 4 releases its elastic potential energy, pushing the valve shaft 2 to move vertically downward along the installation space 11, causing the valve core and valve seat to be precisely squeezed together, forming a sealing mark. The valve shaft 2 is locked again by the locking assembly 5 to prevent the valve core and valve seat from being continuously squeezed together. Then, the tools are removed or the valve core is taken out to observe the sealing mark to verify the tightness of the valve.

[0026] It should be noted that in this embodiment, the mounting housing 1 provides a rigid mounting base to ensure the stability of the overall structure; the valve shaft 2, as the force transmission carrier, works with the elastic element 4 to simulate the closing force of the actuator when the valve is actually working; the elastic element 4 can provide a constant, vertical force; the locking assembly 5 realizes the stable maintenance and rapid release of the energy storage state of the elastic element 4, ensuring the controllability of the compression process; the valve core connector 3 realizes the reliable connection between the valve core and the valve shaft 2, ensuring the effective transmission of force. The overall structure simulates the core functions of the valve cover, valve shaft 2 and actuator to restore the real closing condition of the valve.

[0027] Specifically, elastic element 4 is selected from helical springs or other elastic components.

[0028] The sealing surface imprint inspection tool provided in this embodiment, compared with the prior art, utilizes a rigid structure consisting of the mounting housing 1 and valve shaft 2, combined with the precise connection of the valve core connector 3, to ensure that the valve core falls vertically under the driving force of the elastic element 4, perfectly aligning with the valve seat. This effectively avoids misalignment and breakage of the sealing line, significantly improving inspection efficiency. This tool eliminates the need for complete reassembly of the valve and actuator; the simplified mounting housing 1 quickly connects to the valve body, saving the tedious steps of disassembly and reassembly, reducing manpower and material investment, and lowering inspection costs. The constant, vertical closing force provided by the elastic element 4 accurately simulates the actual sealing conditions of the valve during operation. Compared to the instantaneous force of traditional tapping and the complex reassembly inspection process, the resulting sealing imprint more accurately reflects the valve's sealing performance, significantly improving acceptance reliability and preventing situations where the imprint is acceptable but internal leakage occurs after operation. The valve core connector 3 can adapt to valve cores of different specifications, and the structural design of the mounting housing 1 is compatible with various valve bodies, broadening the tool's applicability.

[0029] In some embodiments, see Figure 4 A locking hole 21 is provided on the outer periphery of the valve shaft 2 corresponding to the locking end. The locking end is inserted into the locking hole 21 to restrict the displacement of the valve shaft 2 in the vertical direction.

[0030] This embodiment achieves the limiting and fixing of the valve shaft 2 through the insertion and engagement of the locking end and the locking hole 21. This effectively prevents accidental displacement of the valve shaft 2 during the energy storage process of the elastic element 4, ensuring that the elastic element 4 is always in the preset energy storage state, and guaranteeing the stability and consistency of the force during subsequent release. The insertion and engagement method is convenient to operate, and the locking and unlocking process is fast and efficient. The energy storage preparation and imprint formation steps can be completed without complicated operations. Compared with the human operation error and cumbersome reassembly inspection process of the traditional tapping method, it further reduces the labor intensity of inspection personnel and saves inspection time.

[0031] In some embodiments, see Figure 1A connecting seat 13 is installed on the bottom outer periphery of the mounting housing 1, and the connecting seat 13 has a mounting hole 131 for connecting to the valve body. The tool can be quickly and easily fixed to the valve body by passing bolts or other fasteners through the mounting hole 131. The installation process is simple and efficient, requiring no complex positioning and adjustment steps, significantly reducing tool installation time. The connecting seat 13 increases the contact area between the mounting housing 1 and the valve body, making the tool more securely fixed and preventing misalignment between the valve core and valve seat due to tool movement during inspection, thus ensuring the accuracy of the sealing imprint.

[0032] In some embodiments, see Figure 1 and Figure 2 The top end of the valve shaft 2 protrudes from the mounting housing 1 and is connected to a grip handle 22. The grip handle 22 provides a convenient point of force for the lifting operation of the valve shaft 2. The inspector can easily pull the valve shaft 2 upward through the handle to complete the energy storage process of the elastic element 4, reducing labor intensity and improving the convenience of on-site operation.

[0033] In some embodiments, see Figure 1 and Figure 3 The bottom side of the mounting housing 1 is also provided with a guide hole 14, which extends vertically and communicates with the mounting space 11. The sealing surface imprint inspection tool also includes a guide 6, which passes through the guide hole 14 and connects to the bottom end of the valve shaft 2. The guide 6 slides with the guide hole 14 to limit the displacement distance of the valve shaft 2 in the vertical direction.

[0034] In this embodiment, the sliding fit between the guide hole 14 and the guide member 6 precisely limits the vertical displacement of the valve shaft 2, ensuring that the compression stroke of the valve core and valve seat remains within a reasonable range. This avoids damage to the sealing surface due to excessive compression or unclear imprints due to insufficient compression, effectively improving the safety and accuracy of the inspection. The fit between the guide member 6 and the guide hole 14 further constrains the movement trajectory of the valve shaft 2, ensuring that the valve shaft 2 always moves vertically, strengthening the alignment of the valve core and valve seat, and improving inspection efficiency. The smooth sliding fit between the guide member 6 and the valve shaft 2 prevents jamming during long-term use, ensuring the tool's service life and the continuous and efficient operation of the inspection work.

[0035] In some embodiments, see Figure 4The locking assembly 5 includes a locking seat 51, a locking rod 52, and a locking reset member 53. The locking seat 51 is installed on the top side of the mounting housing 1 and has a locking space inside. The locking rod 52 slides radially through the locking seat 51 along the mounting channel 12. The outer periphery of the locking rod 52 has an abutment plate 521, and the outer periphery of the abutment plate 521 slides in cooperation with the inner wall of the locking space. The end of the locking rod 52 facing the valve shaft 2 forms a locking end. The locking reset member 53 is sleeved on the locking rod 52, and both ends of the locking reset member 53 abut against the abutment plate 521 and the locking seat 51, respectively. The locking reset member 53 is configured with a preload force to push the abutment plate 521 toward the mounting housing 1.

[0036] Specifically, the locking reset component 53 uses a reset spring.

[0037] The locking assembly 5 provided in this embodiment has a simple and stable structure. The locking assembly 5 uses the pre-tightening force of the locking reset member 53 to push the abutment plate 521, ensuring that the locking end of the locking rod 52 always has a force towards the valve shaft 2. This ensures the reliability of the abutment or insertion fit between the locking end and the valve shaft 2, preventing accidental displacement of the valve shaft 2 during the energy storage process of the elastic member 4, and guaranteeing the stability of the energy storage state. During inspection, simply pulling the locking rod 52 releases the lock. After release, the locking reset member 53 automatically pushes the locking rod 52 back to lock. The operation is convenient and efficient, eliminating the need for complex locking and unlocking steps, significantly improving the smoothness of the inspection process and reducing the operational difficulty for inspectors. The sliding fit between the abutment plate 521 and the inner wall of the locking space ensures the precise movement trajectory of the locking rod 52, preventing locking failure caused by locking end offset, and further improving the stability and safety of the tool.

[0038] In some embodiments, see Figure 4 The inner diameter of the installation channel 12 is smaller than the inner diameter of the installation space 11. A connecting protrusion 23 is provided in the middle of the valve shaft 2. The diameter of the connecting protrusion 23 is larger than the diameter of the valve shaft 2. The outer periphery of the connecting protrusion 23 slides against the inner wall of the installation space 11. The two ends of the elastic element 4 abut against the top of the connecting protrusion 23 and the top of the installation space 11, respectively. The abutment of the two ends of the elastic element 4 against the top of the connecting protrusion 23 and the top of the installation space 11 makes the extension and retraction of the elastic element 4 smoother and the force transmission more uniform. It can continuously provide a constant, vertical closing force, perfectly simulating the force of the actuator during actual valve operation, effectively improving the reliability of the test results. The sliding fit between the outer periphery of the connecting protrusion 23 and the inner wall of the installation space 11 further constrains the movement trajectory of the valve shaft 2, ensuring that the valve shaft 2 always moves in the vertical direction. The diameter of the connecting protrusion 23 is larger than the diameter of the valve shaft 2, which effectively limits the radial displacement of the valve shaft 2 and prevents the valve shaft 2 from shaking during movement.

[0039] In some embodiments, see Figure 1 and Figure 4The guide member 6 includes an integrally cast limiting arm 61 and a limiting protrusion 62. The limiting arm 61 passes through the guide hole 14 and is screwed to the valve shaft 2. The central axis of the limiting arm 61 is parallel to the radial direction of the valve shaft 2. The limiting protrusion 62 is installed at the end of the limiting arm 61 and is used to engage with a tool to drive the limiting arm 61 to rotate.

[0040] In practice, the limiting protrusion 62 has a hexagonal hole or a cross-shaped conical hole to facilitate the engagement of the screwdriver with the limiting protrusion 62.

[0041] In this embodiment, the guide component 6 adopts an integrally cast structure, which has the advantages of robust structure, high strength, and long service life. It can effectively withstand the force during the movement of the valve shaft 2, avoiding inspection interruption due to damage to the guide component 6 and ensuring the continuous and stable operation of the inspection work. The design of the limiting protrusion 62 facilitates the rotation of the limiting arm 61 by using a tool, which is convenient for the installation and adjustment of the guide component 6, reduces the difficulty of operation, and improves the convenience of the inspection process.

[0042] In some embodiments, see Figure 5 The bottom inner edge of the mounting housing 1 has a first inclined surface 15 that gradually slopes outward from top to bottom; the top of the valve core connector 3 has a second inclined surface 31 corresponding to the first inclined surface 15, and the second inclined surface 31 fits vertically with the first inclined surface 15. The vertical fit design of the first inclined surface 15 and the second inclined surface 31 forms an automatic centering structure. During tool installation, the second inclined surface 31 of the valve core connector 3 will naturally fit along the first inclined surface 15 of the mounting housing 1, guiding the valve core connector 3 to precise positioning, thereby driving the valve core and valve seat to automatically center, eliminating the need for repeated manual adjustments and greatly improving the convenience and accuracy of installation and positioning.

[0043] In some embodiments, see Figure 5 The valve shaft 2 has a connecting rod 24 at its bottom, and the outer circumference of the connecting rod 24 has external threads. The top of the valve core connector 3 has a threaded groove 32 corresponding to the external threads, and the threaded groove 32 is screwed onto the connecting rod 24. The screwed connection between the valve shaft 2 and the valve core connector 3 has the advantages of strong connection and convenient disassembly and assembly. It facilitates quick replacement of the valve core connector 3 according to different specifications of valve cores without complicated disassembly tools and processes, greatly improving tool compatibility and inspection efficiency. The screwed structure has strong sealing and stability. During the release of force by the elastic element 4, it can effectively prevent relative displacement between the valve core connector 3 and the valve shaft 2, ensuring effective force transmission, making the squeezing force constant and uniform, and simulating the actual valve closing condition better, thus improving the reliability of acceptance.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tool for inspecting imprints on a sealing surface, characterized in that, include: The mounting housing (1) has an internal mounting space (11) extending in the vertical direction, and the top of the mounting space (11) has a mounting channel (12) communicating with the outside. The valve shaft (2) passes through the mounting channel (12) and the mounting space (11) sequentially from top to bottom, with the bottom end of the valve shaft (2) extending out of the mounting space (11); A valve core connector (3) is located below the mounting housing (1) and connected to the bottom of the valve shaft (2). The valve core connector (3) is used to connect the valve core. An elastic element (4), disposed within the mounting space (11), is used to provide an elastic force for the downward movement of the valve shaft (2); and A locking assembly (5) is provided on one side of the mounting housing (1). The locking assembly (5) has a locking end that moves radially along the valve shaft (2). The locking end can abut against the valve shaft (2) to limit the displacement of the valve shaft (2) in the vertical direction.

2. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The valve shaft (2) has a locking hole (21) on its outer periphery corresponding to the locking end. The locking end is inserted into the locking hole (21) to restrict the displacement of the valve shaft (2) in the vertical direction.

3. The sealing surface imprint inspection tool as described in claim 1, characterized in that, A connecting seat (13) is installed on the bottom outer periphery of the mounting housing (1), and the connecting seat (13) has a mounting hole (131) for connecting to the valve body.

4. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The top end of the valve shaft (2) extends out of the mounting housing (1) and is connected to a grip handle (22).

5. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The bottom side of the mounting housing (1) is also provided with a guide hole (14), which extends vertically and communicates with the mounting space (11); The sealing surface imprint inspection tool also includes a guide (6), which passes through the guide hole (14) and is connected to the bottom end of the valve shaft (2). The guide (6) and the guide hole (14) are slidably engaged to limit the displacement distance of the valve shaft (2) in the vertical direction.

6. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The locking assembly (5) includes: A locking seat (51) is installed on the top side of the mounting housing (1), and the locking seat (51) has a locking space inside; A locking rod (52) is radially slidably inserted into the locking seat (51) along the mounting channel (12). The outer periphery of the locking rod (52) has an abutment plate (521), the outer peripheral surface of which slides against the inner wall of the locking space. The end of the locking rod (52) facing the valve shaft (2) forms the locking end. A locking reset member (53) is sleeved on the locking rod (52), and the two ends of the locking reset member (53) abut against the abutment plate (521) and the locking seat (51) respectively. The locking reset member (53) is configured with a preload force to push the abutment plate (521) toward the mounting housing (1).

7. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The inner diameter of the mounting channel (12) is smaller than the inner diameter of the mounting space (11); The valve shaft (2) has a connecting protrusion (23) in the middle. The diameter of the connecting protrusion (23) is larger than the diameter of the valve shaft (2). The outer periphery of the connecting protrusion (23) slides in fit with the inner wall of the mounting space (11). The two ends of the elastic member (4) abut against the top of the connecting protrusion (23) and the top of the mounting space (11), respectively.

8. The sealing surface imprint inspection tool as described in claim 5, characterized in that, The guide member (6) includes an integrally cast limiting arm (61) and a limiting protrusion (62). The limiting arm (61) passes through the guide hole (14) and is screwed to the valve shaft (2). The central axis of the limiting arm (61) is parallel to the radial direction of the valve shaft (2). The limiting protrusion (62) is installed at the end of the limiting arm (61) and is used to engage with a tool to drive the limiting arm (61) to rotate.

9. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The bottom inner edge of the mounting housing (1) has a first inclined surface (15) that gradually slopes outward from top to bottom; The valve core connector (3) has a second inclined surface (31) on its top corresponding to the first inclined surface (15), and the second inclined surface (31) is in close contact with the first inclined surface (15).

10. The sealing surface imprint inspection tool as described in claim 1, characterized in that, The bottom of the valve shaft (2) has a connecting rod (24), and the outer periphery of the connecting rod (24) has an external thread; the top of the valve core connector (3) has a threaded groove (32) corresponding to the external thread, and the threaded groove (32) is screwed to the connecting rod (24).

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