Tooling for an adjustable special valve

Abstract

This utility model discloses a tooling for an adjustable special valve, relating to the field of valve product testing technology. It includes a sleeve, a first connecting pipe, and a second connecting pipe. One end of the first connecting pipe is inserted into the sleeve and has an external thread for connection to a pressure testing bench. One end of the second connecting pipe is inserted into the sleeve and has a flange for connection to the product. Both are installed in the sleeve using a plug-in method and can be infinitely adjusted axially to adapt to different installation positions. The inner wall of the sleeve has a guide rail groove, and the middle of the connecting pipe has a guide rail that slides with it to achieve guidance and anti-rotation. A sealing sliding assembly is provided between the two connecting pipes and the sleeve, consisting of a rubber O-ring and a PTFE ring forming a double seal, and equipped with a wear-resistant ring to improve durability. This tooling has a compact structure, strong adaptability, and can be quickly clamped during pressure testing of valve products of different specifications, ensuring sealing reliability, improving testing efficiency, and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of valve product testing technology, specifically a tooling for an adjustable special valve. Background Technology

[0002] Before leaving the factory, valve products (especially pressure control valves) must have their key performance parameters—opening pressure (such as the opening pressure of a safety valve) or set pressure—precisely adjusted and verified.

[0003] The common method of adjustment is to directly connect the valve under test to the pressure test bench. However, this method has significant problems:

[0004] Inconvenient connection: The interface of the pressure test bench is often incompatible with the interface of the valve under test (such as thread specifications, flange standards, pressure ratings), requiring the search for or customization of multiple adapters, which is time-consuming and labor-intensive.

[0005] Other methods often use fixed-length adapters, hoses, or single-end quick-change fittings to complete the connection. However, when frequently changing models, repeated adjustments to distance and orientation are required, and the consistency of sealing pre-tightening and coaxiality is difficult to reproduce, affecting clamping efficiency. Therefore, there is an urgent need for a specialized tooling with axial stepless adjustment and anti-rotation guidance between the pressure test bench end and the valve end, compatible with common external thread and flange interfaces, to better suit production line needs and improve adjustment efficiency and stability. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the existing defects and provide a tooling for an adjustable special valve, which can quickly adapt to the connection of valve products of different lengths and positions, significantly shortening the clamping preparation time; the cooperation between the guide rail and the guide rail groove provides precise guidance and anti-rotation function, ensuring coaxiality and sealing reliability during the docking process, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a tooling for an adjustable special valve, comprising a sleeve, a first connecting pipe, and a second connecting pipe. One end of the first connecting pipe is inserted into the sleeve, and the other end of the first connecting pipe is provided with an external thread for connection to a pressure testing bench. One end of the second connecting pipe is inserted into the sleeve, and the other end of the second connecting pipe is provided with a flange for fixing to the product with bolts. The first and second connecting pipes are respectively connected by insertion, allowing for stepless adjustment of the distance between the first and second connecting pipes to meet connection requirements at different positions. This facilitates connection of the first connecting pipe to the pressure testing bench and the second connecting pipe to the product, improving work efficiency and practicality. The sleeve has guide grooves on the inner walls at both ends, and guide rails are provided in the middle of the first and second connecting pipes. The guide rails are slidably connected to the guide grooves. The cooperation between the guide rails and the guide grooves can restrict and guide the connecting pipes, preventing rotation between the connecting pipes and the sleeve. Sealing sliding components are provided between the inner ends of the first and second connecting pipes and the sleeve. By sealing the inner ends of the connecting pipes and guiding and limiting the sliding in the middle, stepless adjustment of the connector end can be achieved. The ingenious layout of this structure facilitates the disassembly and assembly of the product. Pressure is provided by a pressure testing bench to adjust the pressure of the product, meeting the pressure regulation requirements of valve products and making it convenient to use.

[0008] Furthermore, the inner wall of the sleeve is provided with an annular sealing groove and a wear-resistant annular groove in the circumferential direction. The annular sealing groove is respectively located on both sides of the wear-resistant annular groove, and two wear-resistant annular grooves are provided. The sealing sliding assembly includes a polytetrafluoroethylene (PTFE) ring, a rubber O-ring, and a wear-resistant ring. The rubber O-ring and the PTFE ring are sequentially arranged in the annular sealing groove. The PTFE ring contacts and seals with the outer surface of the connecting pipe. The sealing structure formed by the rubber O-ring and the PTFE ring together ensures that there will be no air leakage at the sliding connection between the connecting pipe and the sleeve. The wear-resistant ring is located in the wear-resistant annular groove to improve the wear resistance of the sleeve.

[0009] Furthermore, at least three guide rail grooves are provided, and the guide rail grooves are evenly distributed along the circumference of the sleeve. A limit ring is provided at the outer end of the guide rail, which can limit the depth of the connecting pipe inserted into the sleeve. Locking screws are provided on the side wall of the sleeve to fix the axial position of the connecting pipe.

[0010] Furthermore, the first connecting pipe and the second connecting pipe have the same diameter, and the inner ends of the first connecting pipe and the second connecting pipe are not in contact.

[0011] Furthermore, the outer end of the first connecting pipe is connected to a nut via an external thread, and a sealing ring is respectively provided on the outer surface of the nut and the outer surface of the flange.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, by setting a first connecting pipe and a second connecting pipe at both ends of the sleeve and adopting an axial stepless telescopic plug-in structure, allows the tooling to adjust the connection position at both ends within a large range, quickly adapting to valve products of different lengths and installation depths; the pressure test bench end adopts an external thread interface, and the valve end adopts a flange connection, which not only ensures the universality of the interface, but also facilitates direct docking with existing pressure test benches and the tested products.

[0014] 2. By cooperating with the guide rail and guide rail groove, the connecting pipe is guided and anti-rotation is controlled during the expansion and contraction process, maintaining the coaxiality of both ends, reducing sealing failure and installation deviation caused by eccentricity or rotation, and ensuring stable and reliable transmission of test pressure.

[0015] 3. The outer end of the connecting pipe is equipped with a limiting ring, which can limit its maximum insertion depth and prevent over-insertion from causing component interference or excessive compression of the seal; the locking screw on the side wall of the sleeve is used to fix the connecting pipe at the target position to prevent axial displacement or loosening during pressurization. This tooling has a simple structure, detachable components, and convenient replacement of the sealing ring and wear ring, which reduces maintenance costs and improves the stability and safety of long-term use. Attached Figure Description

[0016] Figure 1 For the isometric projection of this utility model Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the internal structure of the sleeve of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal sealing structure of this utility model;

[0019] Figure 4 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 5 For the isometric projection of this utility model Figure 2 .

[0021] In the diagram: 1. External thread, 2. First connecting pipe, 3. Sealing ring 1, 4. Nut, 5. Sleeve, 6. Guide rail, 7. Second connecting pipe, 8. Flange, 9. Limiting ring, 10. Guide rail groove, 11. Annular sealing groove, 12. Wear-resistant annular groove, 13. PTFE ring, 14. Rubber O-ring, 15. Wear-resistant ring, 16. Locking screw. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a tooling for an adjustable special valve, including a sleeve 5, a first connecting pipe 2, and a second connecting pipe 7. One end of the first connecting pipe 2 is inserted into the sleeve 5, and the other end is provided with an external thread 1 for connection to a pressure testing bench. One end of the second connecting pipe 7 is inserted into the sleeve 5, and the other end is provided with a flange 8 for fixing to the product with bolts. Both the first connecting pipe 2 and the second connecting pipe 7 are installed in the sleeve 5 by insertion, which can adjust the distance between them to achieve stepless adjustment to adapt to the connection requirements of different positions, thereby facilitating the connection of the first connecting pipe 2 to the pressure testing bench and the connection of the second connecting pipe 7 to the product. Guide grooves 10 are respectively provided on the circumferential direction of the inner walls at both ends of the sleeve 5. Guide rails 6 are respectively provided in the middle of the first connecting pipe 2 and the middle of the second connecting pipe 7. The guide rails 6 are slidably connected to the guide grooves 10 to limit the movement direction of the connecting pipes and prevent rotation. Sealing sliding components are provided between the inner end of the first connecting pipe 2 and the sleeve 5, and between the inner end of the second connecting pipe 7 and the sleeve 5.

[0024] In another possible implementation, the inner wall of the sleeve 5 is provided with an annular sealing groove 11 and a wear-resistant annular groove 12 in the circumferential direction. The annular sealing groove 11 is located on both sides of the wear-resistant annular groove 12, and two wear-resistant annular grooves 12 are provided. The sealing sliding assembly includes a polytetrafluoroethylene ring 13, a rubber O-ring 14, and a wear-resistant ring 15. The rubber O-ring 14 and the polytetrafluoroethylene ring 13 are installed in the annular sealing groove 11 in sequence. The polytetrafluoroethylene ring 13 contacts the outer surface of the connecting pipe to form a seal. The rubber O-ring 14 and the polytetrafluoroethylene ring 13 together constitute a double sealing structure to prevent air leakage at the sliding connection. The wear-resistant ring 15 is installed in the wear-resistant annular groove 12 to improve the wear resistance of the sleeve 5.

[0025] In another possible implementation, at least three guide rail grooves 10 are provided and are evenly distributed along the circumference of the sleeve 5. The outer end of the guide rail 6 is provided with a limiting ring 9 to limit the depth of the connecting pipe inserted into the sleeve 5. The side wall of the sleeve 5 is provided with locking screws 16 for fixing the axial position of the connecting pipe.

[0026] In another possible implementation, the first connecting pipe 2 and the second connecting pipe 7 have the same diameter and their inner ends do not contact each other to avoid interference at extreme positions.

[0027] In another possible implementation, the outer end of the first connecting pipe 2 is connected to the nut 4 by the external thread 1, and the outer surface of the nut 4 and the outer surface of the flange 8 are respectively provided with sealing rings 3 to form a seal at the end face position.

[0028] Working principle

[0029] The adjustable special valve fixture of this utility model uses a sleeve 5 as a central bearing component. The first connecting pipe 2 and the second connecting pipe 7 are respectively inserted into the sleeve 5 from both ends, and the distance between the two ends is infinitely adjustable by sliding. The guide groove 10 on the inner wall of the sleeve 5 cooperates with the guide rail 6 on the connecting pipe to realize the linear guidance and anti-rotation control of the connecting pipe and ensure the coaxiality of the two ends. The external thread 1 end is connected to the pressure test bench, and the flange 8 end is connected to the valve body. The test medium is transmitted to the valve body in sequence along the first connecting pipe 2, sleeve 5 and second connecting pipe 7 to realize pressure setting and testing. The sealing sliding assembly is composed of a rubber O-ring 14 and a polytetrafluoroethylene ring 13 to ensure airtightness during sliding. The wear-resistant ring 15 bears the sliding friction and protects the sleeve structure. The limiting ring 9 limits the insertion depth, and the locking screw 16 fixes the position of the connecting pipe to prevent displacement during the test.

[0030] With its stepless adjustment structure, it can quickly adapt to valve products of different lengths and installation depths, shortening the test preparation time.

[0031] The external thread and flange interface design is compatible with common pressure testing benches and the products being tested, improving versatility.

[0032] The guide rail and guide rail groove work together to provide precise guidance and anti-rotation control, maintain coaxiality, and reduce seal failure caused by eccentricity;

[0033] The double sealing structure improves sealing reliability under high pressure conditions, and the wear-resistant ring extends the life of the sleeve.

[0034] The limiting ring and locking screw improve assembly consistency and stability and safety during operation;

[0035] The structure is detachable, and the sealing ring and wear ring are easy to replace, reducing maintenance costs and extending service life.

[0036] Alternative or modified implementation methods

[0037] Sleeve 5 and connecting pipe can be made of stainless steel, carbon steel or high-strength alloy, and an anti-corrosion coating can be added to the surface.

[0038] External thread 1 and flange 8 can be replaced with different specifications to match pressure test benches and valve body interfaces of different standards;

[0039] The sealing components can be made of materials such as fluororubber, ethylene propylene rubber, and PEEK, depending on the medium; the wear ring can be made of carbon fiber reinforced PTFE or ceramic coating.

[0040] The number of guide rail slots can be increased to four or more, the locking mechanism can adopt a quick-lock buckle or clamping ring structure, and the limit ring can adopt a detachable design to adjust the insertion depth;

[0041] Under special working conditions, the inner ends of the first connecting pipe 2 and the second connecting pipe 7 can be designed to have limited contact to form a mechanical stop;

[0042] Nut 4 can be replaced with a quick-connect coupling; sealing ring 3 can be a metal seal or other high-performance seal.

[0043] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A tool for adjustable dedicated valves, comprising a sleeve (5), a first connecting pipe (2) and a second connecting pipe (7), characterized in that: One end of the first connecting pipe (2) is inserted into the sleeve (5), and the other end of the first connecting pipe (2) is provided with an external thread (1). One end of the second connecting pipe (7) is inserted into the sleeve (5), and the other end of the second connecting pipe (7) is provided with a flange (8). The inner walls of both ends of the sleeve (5) are respectively provided with guide rail grooves (10) in the circumferential direction. The middle part of the first connecting pipe (2) is provided with guide rails (6) in the circumferential direction and the middle part of the second connecting pipe (7) is provided with guide rails (6) in the circumferential direction. The guide rails (6) are slidably connected to the guide rail grooves (10). The inner ends of the first connecting pipe (2) and the inner ends of the second connecting pipe (7) are respectively provided with sealing sliding components between the sleeve (5) and the sleeve (5).

2. An adjustable special purpose valve tooling according to claim 1, wherein: The inner wall of the sleeve (5) is provided with an annular sealing groove (11) and a wear-resistant annular groove (12) in the circumferential direction. The annular sealing groove (11) is respectively provided on both sides of the wear-resistant annular groove (12). There are two wear-resistant annular grooves (12). The sealing sliding assembly includes a polytetrafluoroethylene ring (13), a rubber O-ring (14) and a wear-resistant ring (15). The rubber O-ring (14) and the polytetrafluoroethylene ring (13) are arranged in the annular sealing groove (11) in sequence. The polytetrafluoroethylene ring (13) is in contact with the outer surface of the connecting pipe for sealing. The wear-resistant ring (15) is arranged in the wear-resistant annular groove (12).

3. An adjustable special purpose valve tooling according to claim 1, wherein: At least three guide rail grooves (10) are provided, and the guide rail grooves (10) are evenly arranged along the circumference of the sleeve (5). A limit ring (9) is provided at the outer end of the guide rail (6), and a locking screw (16) is provided on the side wall of the sleeve (5).

4. The tooling for adjustable dedicated valves of claim 1, wherein: The first connecting pipe (2) and the second connecting pipe (7) have the same diameter, and the inner ends of the first connecting pipe (2) and the second connecting pipe (7) are not in contact.

5. An adjustable special purpose valve tooling according to claim 1, wherein: The outer end of the first connecting pipe (2) is connected to a nut (4) by an external thread (1), and a sealing ring (3) is provided on the outer surface of the nut (4) and the outer surface of the flange (8).

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