A tooling for performance testing of built-in one-way valves

Abstract

This utility model relates to a testing fixture, and more particularly to a fixture for testing the performance of a built-in one-way valve. The fixture for testing the performance of a built-in one-way valve includes an inlet connector, an outlet connector, and a sealing ring. One end of the inlet connector has a connecting part A, and the other end has a connecting part B, with a stepped hole I along the central axis of the inlet connector. One end of the outlet connector has a connecting part C, and the other end has a connecting part D, with a stepped hole II along the central axis of the outlet connector. Connecting parts A and C are used to connect to a fluid pressure source on a test bench. After connecting parts B and D are connected, a cavity is formed inside to accommodate the built-in one-way valve. The valve and spring of the built-in one-way valve face the inlet connector and the outlet connector respectively, thus dividing the cavity into two spaces. This utility model shortens the product testing and delivery cycle, improves product testing efficiency, has a simple structure, is easy to operate, and is easy to maintain.

Description

Technical Field

[0001] This utility model relates to a testing fixture, and more particularly to a fixture for testing the performance of a built-in one-way valve. Background Technology

[0002] One-way valves are important valve components for controlling the direction of fluid flow, widely used in aviation, aerospace, marine, and petrochemical industries. They are commonly used to control fluid flow in one direction and restrict fluid flow in the opposite direction. One-way valves mainly consist of a housing, a valve (or steel ball), and a spring. Their installation types include pipe connection type, cartridge type, and built-in type. Built-in one-way valves are embedded in the fluid passage, featuring a simple and compact structure, reliable operation, low pressure loss, and rapid opening response, making them the most widely used in the aerospace field. To test the manufacturing and assembly quality and performance of one-way valves, performance tests such as reverse sealing tests and opening pressure tests are typically required. Because different one-way valves have different structures and diameters, while the interfaces of the testing systems are relatively fixed, the connection between the one-way valve and the testing system usually requires the design of dedicated one-way valve performance testing fixtures. Traditional performance testing fixtures for built-in one-way valves typically use double flanges to clamp the valve under test, supplemented by bolts, nuts, and sealing rings for connection and sealing. However, when connecting the flanges with bolts and nuts, multiple sets of fasteners are usually required, making the clamping and disassembly process cumbersome, time-consuming, and labor-intensive. During large-scale product testing, the clamping, disassembly, and replacement processes are repeated frequently. The low clamping and disassembly efficiency of traditional built-in one-way valve performance testing fixtures makes them particularly inconvenient to use, severely hindering the improvement of product testing efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a tooling for performance testing of built-in one-way valves, which allows for quick clamping and disassembly of built-in one-way valves.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a tooling for performance testing of a built-in one-way valve, comprising an inlet connector, an outlet connector, and a sealing ring; one end of the inlet connector is provided with a connecting part A, and the other end is provided with a connecting part B, and a stepped hole I is provided along the central axis of the inlet connector; one end of the outlet connector is provided with a connecting part C, and the other end is provided with a connecting part D, and a stepped hole II is provided along the central axis of the outlet connector; connecting parts A and C are used to connect to a fluid pressure source of the test bench; after connecting parts B and D are connected, a cavity is formed inside to accommodate the built-in one-way valve, and the valve and spring of the built-in one-way valve face the inlet connector and the outlet connector respectively, thereby dividing the cavity into two spaces; there are two sealing rings, which are respectively installed at the sealing steps of the stepped holes I and II near the housing of the built-in one-way valve.

[0005] Preferably, both connecting parts A and C are connectors with external threads.

[0006] Preferably, the connecting part B is screwed to the connecting part D.

[0007] Working principle: The inlet and outlet connectors are connected together by threads. The product under test (with a built-in one-way valve) is sandwiched between them. The inlet and outlet sealing rings are embedded in the sealing steps or grooves of the connectors. The exposed end faces of the inlet and outlet sealing rings respectively conform to the two parallel and opposite end faces of the product under test. When the threads of the inlet and outlet connectors are tightened, the inlet and outlet sealing rings and the product under test are simultaneously compressed, achieving a seal while tightening. When loading / unloading the product under test, only the threads of the inlet and outlet connectors need to be tightened / loosened. The tooling structure is simple and reliable, and the replacement is convenient, fast, and time-saving.

[0008] Compared with the prior art, the present invention has the following advantages:

[0009] 1. The design is scientific and ingenious, enabling fast and efficient product clamping and disassembly, greatly shortening the product clamping and disassembly time, thereby shortening the product testing and delivery cycle and significantly improving product testing efficiency.

[0010] 2. It has a simple structure, is easy to operate, uses few fasteners, and is easy to maintain. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the clamping and mounting of the built-in one-way valve according to an embodiment of this utility model;

[0012] Figure 2 This is a front view of the built-in one-way valve in an embodiment of this utility model (the built-in one-way valve is the product under test).

[0013] Figure 3This is a left view of the built-in one-way valve in an embodiment of this utility model;

[0014] Figure 4 This is a front view of the inlet connector in an embodiment of this utility model;

[0015] Figure 5 This is a front view of the outlet connector in an embodiment of this utility model;

[0016] Figure 1 In the diagram, 1 is a built-in one-way valve; 2 is an inlet connector; 3 is an outlet connector; 4 is an outlet sealing ring; and 5 is an inlet sealing ring. Detailed Implementation

[0017] It should be noted that the terms "left" and "right" are used to describe the situation as shown in the accompanying drawings or in the usual usage state, and those skilled in the art should understand them in accordance with the technical solution of this utility model.

[0018] The following is in conjunction with the appendix Figure 1-5 The present invention is further described in detail as follows: A fixture for performance testing of an internal one-way valve consists of an inlet connector 2, an outlet connector 3, an inlet sealing ring 5, and an outlet sealing ring 4. Both the inlet connector 2 and the outlet connector 3 have a nozzle at one end and a connecting part at the other end, with a stepped hole along their central axis. The nozzle and the connecting part are the left and right ends of the stepped hole, respectively. The inlet connector 2 and the outlet connector 3 are connected together by threads in the connecting part. The product to be tested (internal one-way valve 1) is sandwiched in the stepped hole between them. The inlet sealing ring 5 and the outlet sealing ring 4 are embedded in the sealing step or sealing ring groove of the connector. The exposed end faces of the inlet sealing ring 5 and the outlet sealing ring 4 respectively conform to the two parallel and opposite end faces of the product to be tested. When the threads of the inlet connector 2 and the outlet connector 3 are tightened, the inlet sealing ring 5, the outlet sealing ring 4, and the product to be tested are simultaneously pressed together, achieving sealing while tightening, thereby dividing the stepped hole into two sealing spaces.

[0019] Specifically,

[0020] like Figure 4 As shown, the inlet connector 2 is used to support and fix the built-in one-way valve 1, and also provides a mechanical interface for checking the leakage of the product under test (built-in one-way valve 1) or for the supply of oil to the test bench. The inlet connector 2 is designed with a sealing step or sealing ring groove, which mates with the inlet sealing ring 5 to achieve a seal. In addition, the inlet connector 2 is also designed with threads, which mate with the threads of the outlet connector 3 to compress the product under test and the inlet and outlet sealing rings.

[0021] like Figure 5As shown, the outlet connector 3 is used to support and fix the built-in one-way valve 1, and also provides a mechanical interface for the oil supply of the test bench. The outlet connector 3 is designed with a sealing step or sealing ring groove, which mates with the outlet sealing ring to achieve a seal. In addition, the outlet connector 3 is also designed with threads that mate with the threads of the inlet connector to compress the product under test and the inlet and outlet sealing rings.

[0022] Performance testing procedure for built-in one-way valve:

[0023] 1. First, install the inlet sealing ring 5 at the stepped hole sealing step of the inlet connector 2, and install the outlet sealing ring 4 at the stepped hole sealing step of the outlet connector 3.

[0024] 2. Then, install the built-in one-way valve 1 in the stepped hole of the outlet connector 3 so that the end face of the built-in one-way valve 1 and the outlet sealing ring 4 fit together.

[0025] 3. Subsequently, the inlet connector 2 and the outlet connector 3 are connected together by screwing them together. During the process of tightening the inlet connector 2 and the outlet connector 3 towards each other, the outlet sealing ring 4 and the inlet sealing ring 5 are simultaneously compressed, thereby achieving a seal between the entire tooling set and the built-in one-way valve 1 to be tested;

[0026] 4. Finally, according to the specific requirements of the product performance test, connect the inlet connector 2 or outlet connector 3 to the fluid pressure source of the test bench, and input the specific test medium and pressure of the fluid specified in the product technical conditions into the built-in one-way valve 1 to complete the test;

[0027] 5. After the previous product has been tested, loosen the inlet connector 2, remove the built-in one-way valve 1, replace it with a new built-in one-way valve 1, and repeat steps 3-4 until all built-in one-way valves 1 have been tested.

Claims

1. A tooling for built-in check valve performance testing, characterized in that: It includes an inlet connector, an outlet connector, and sealing rings; one end of the inlet connector is provided with a connecting part A, and the other end is provided with a connecting part B, and a stepped hole I is opened along the central axis of the inlet connector; one end of the outlet connector is provided with a connecting part C, and the other end is provided with a connecting part D, and a stepped hole II is opened along the central axis of the outlet connector; connecting parts A and C are used to connect to the fluid pressure source of the test bench; after connecting parts B and D are connected, a cavity is formed inside to accommodate a built-in one-way valve, and the valve and spring of the built-in one-way valve face the inlet connector and the outlet connector respectively, thereby dividing the cavity into two spaces; there are two sealing rings, which are installed at the sealing steps of the stepped holes I and II near the housing of the built-in one-way valve respectively.

2. The tooling for built-in check valve performance testing of claim 1, wherein: Both connecting parts A and C are connectors with external threads.

3. The tooling for built-in check valve performance testing of claim 1, wherein: Connecting part B is screwed to connecting part D.

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