A water pressure testing fixture

Abstract

This application discloses a water pressure testing fixture, relating to the field of rail vehicle technology. The fixture includes: a main body for pressure testing; a test circulating water storage tank within the main body; a transparent return water observation hose, a water inlet pipe, and a return water pipe connected to the top surface of the test circulating water storage tank; a flanged extension pipe inside the test circulating water storage tank, with one end connected to the water inlet pipe and the other end near the bottom of the test circulating water storage tank; a drain ball valve located at the bottom of the side wall of the main body of the pressure testing fixture, connected to the interior of the test circulating water storage tank; a pressure testing electrical module; and a support frame for the test vehicle body pipelines. This application, through the combination of pressurization equipment and a water tank, along with auxiliary components, meets the pressure testing requirements of water tank pipelines on rail vehicles.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, specifically to a water pressure testing fixture. Background Technology

[0002] With the rapid development of the rail vehicle industry, the types of rail vehicles are increasing, and the number of water tanks matched on board is also increasing, such as small water tanks for storing hot and cold water and glass cleaning water. At the same time, the requirements for pressure resistance, lifespan, and safety and leak prevention of such water tanks are becoming increasingly higher.

[0003] Currently, most of the small water tanks for rail vehicles are custom-made stainless steel welded products. Before leaving the factory, they must undergo pipeline pressure testing. This requires the use of testing instruments or tooling to pressurize and test the entire water tank, check for leaks in each weld and interface, and promptly repair or rework any leaks. Ultimately, it is essential to ensure that the pipeline pressure holding performance of the water tank is up to standard to guarantee safe operation.

[0004] Therefore, to meet practical needs, a water circuit pressure testing fixture is provided. Summary of the Invention

[0005] In view of the deficiencies in the existing technology, the purpose of this application is to provide a water pressure testing fixture, which combines pressurization equipment and water tank, with auxiliary components, to meet the pressure testing requirements of water tank pipelines on rail vehicles.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] This application provides a water circuit pressure testing fixture, the testing fixture comprising:

[0008] The pressure holding test fixture body includes a test circulating water storage tank. A transparent return water observation hose, a water inlet pipe, and a return water pipe are connected to the top surface of the test circulating water storage tank. A flange extension pipe is installed inside the test circulating water storage tank, with its first end connected to the water inlet pipe and its first end near the bottom of the test circulating water storage tank. A drain ball valve is installed at the bottom of the side wall of the pressure holding test fixture body, and the drain ball valve is connected to the inside of the test circulating water storage tank.

[0009] The pressure testing electrical module is equipped with an electrical control cabinet, an electric low-flow test pump, a PP cotton filter, a first shut-off valve, an electronically controlled digital display precision pressure gauge, a signal circuit, and a return water valve.

[0010] Support frame for placing the vehicle body piping under test;

[0011] The electrical control cabinet is electrically connected to the electric low-flow test pump and the electronically controlled digital display precision pressure gauge.

[0012] The electric low-flow test pump and the electronically controlled digital display precision pressure gauge are connected through the signal circuit.

[0013] The electric low-flow test pump, the PP cotton filter, and the first shut-off valve are sequentially connected via a connecting pipe, and the electronically controlled digital display precision pressure gauge is connected to the connecting pipe between the PP cotton filter and the first shut-off valve; wherein...

[0014] The first end of the water supply pipe is connected to the first end of the flange extension pipe, and the second end of the water supply pipe is connected to the electric low-flow test pump.

[0015] The first end of the return water pipe is connected to the inside of the test circulating water storage tank, and the second end of the return water pipe is connected to the second end of the return water valve;

[0016] The first end of the return water valve is connected to the first shut-off valve and the electronically controlled digital display precision pressure gauge, and is equipped with a pressure-resistant hose. The free end of the pressure-resistant hose is equipped with a special water injection connector.

[0017] One end of the transparent return water observation hose is connected to the inside of the test circulating water storage tank, and the free end of the transparent return water observation hose is sequentially connected to a second shut-off valve and a special water outlet connector.

[0018] The bottom surface of the pressure holding and testing fixture is provided with multiple threaded fixing holes;

[0019] The tooling also includes multiple pipe plugs for blocking empty pipe openings in the pipes of the vehicle body under test.

[0020] Based on the above technical solution, the length direction of the flange extension pipe is inside the test circulating water storage tank.

[0021] Based on the above technical solution, the test circulating water storage tank is placed at the bottom inside the main body of the pressure holding and testing fixture.

[0022] Based on the above technical solution, the operating height of the dedicated water injection connector is lower than that of the dedicated water outlet connector;

[0023] The operating height is the vertical height when connected to the pipeline of the vehicle body under test.

[0024] Compared with the prior art, the advantages of this application are:

[0025] This application combines pressurization equipment and a water tank, along with auxiliary components, to meet the pressure-holding test requirements of water tank pipelines on rail vehicles. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the connector circuit structure in the water pressure testing fixture of this application embodiment;

[0028] In the picture:

[0029] 1. Main body of pressure holding test fixture; 2. Pressure testing electrical module; 3. Test circulating water storage tank; 4. Electrical control cabinet; 5. Electric low-flow test pump; 6. PP cotton filter; 7. First shut-off valve; 8. Electrically controlled digital display precision pressure gauge; 9. Signal circuit; 10. Return water valve; 11. Pressure-resistant hose; 12. Test vehicle body pipeline support frame; 13. Test vehicle body pipeline; 14. Dedicated water injection connector; 15. Dedicated water outlet connector; 16. Second shut-off valve; 17. Transparent return water observation hose; 18. Sewage ball valve; 19. Water supply pipe; 20. Flange extension pipe; 21. Return water pipe; A. Threaded fixing hole; B. Pipe plug. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0032] This application provides a water pressure testing fixture, which combines a pressurizing device and a water tank, along with auxiliary components, to meet the pressure testing requirements of water tank pipelines on rail vehicles.

[0033] To achieve the aforementioned technical effects, the overall concept of this application is as follows:

[0034] A water pressure testing fixture, the fixture comprising:

[0035] The pressure holding test fixture body 1 includes a test circulating water storage tank 3 inside. The top surface of the test circulating water storage tank 3 is connected to a transparent return water observation hose 17, a water inlet pipe 19, and a return water pipe 21. A flange extension pipe 20 is installed inside the test circulating water storage tank 3. The first end of the flange extension pipe 20 is connected to the water inlet pipe 19. The first end of the flange extension pipe 20 is close to the bottom of the test circulating water storage tank 3. A drain ball valve 18 is installed at the bottom of the side wall of the pressure holding test fixture body 1. The drain ball valve 18 is connected to the inside of the test circulating water storage tank 3.

[0036] The pressure testing electrical module 2 is equipped with an electrical control cabinet 4, an electric low-flow test pump 5, a PP cotton filter 6, a first shut-off valve 7, an electronically controlled digital display precision pressure gauge 8, a signal circuit 9, and a return water valve 10.

[0037] 12, a support frame for the vehicle body pipes to be tested, is used to place the pipes of the vehicle body to be tested.

[0038] The electrical control cabinet 4 is electrically connected to the electric low-flow test pump 5 and the electronically controlled digital display precision pressure gauge 8.

[0039] The electric low-flow test pump 5 and the electronically controlled digital display precision pressure gauge 8 are connected through the signal circuit 9;

[0040] The electric low-flow test pump 5, the PP cotton filter 6, and the first shut-off valve 7 are sequentially connected via a connecting pipe, and the electronically controlled digital display precision pressure gauge 8 is connected to the connecting pipe between the PP cotton filter 6 and the first shut-off valve 7; wherein...

[0041] The first end of the water supply pipe 19 is connected to the first end of the flange extension pipe 20, and the second end of the water supply pipe 19 is connected to the electric low-flow test pump 5.

[0042] The first end of the return water pipe 21 is connected to the inside of the test circulating water storage tank 3, and the second end of the return water pipe 21 is connected to the second end of the return water valve 10.

[0043] The first end of the return water valve 10 is connected to the first shut-off valve 7 and the electronically controlled digital display precision pressure gauge 8, and is equipped with a pressure-resistant hose 11. The free end of the pressure-resistant hose 11 is equipped with a special water injection connector 14.

[0044] One end of the transparent return water observation hose 17 is connected to the inside of the test circulating water storage tank 3, and the free end of the transparent return water observation hose 17 is sequentially connected to the second shut-off valve 16 and the special water outlet connector 15.

[0045] The bottom surface of the pressure holding and testing fixture body 1 is provided with multiple threaded fixing holes A;

[0046] The tooling also includes multiple pipe plugs B for blocking empty pipe openings in the pipes of the vehicle body under test.

[0047] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0048] See Figure 1 As shown in the figure, this application embodiment provides a water circuit pressure testing fixture, which includes:

[0049] The pressure holding test fixture body 1 includes a test circulating water storage tank 3 inside. The top surface of the test circulating water storage tank 3 is connected to a transparent return water observation hose 17, a water inlet pipe 19, and a return water pipe 21. A flange extension pipe 20 is installed inside the test circulating water storage tank 3. The first end of the flange extension pipe 20 is connected to the water inlet pipe 19. The first end of the flange extension pipe 20 is close to the bottom of the test circulating water storage tank 3. A drain ball valve 18 is installed at the bottom of the side wall of the pressure holding test fixture body 1. The drain ball valve 18 is connected to the inside of the test circulating water storage tank 3.

[0050] The pressure testing electrical module 2 is equipped with an electrical control cabinet 4, an electric low-flow test pump 5, a PP cotton filter 6, a first shut-off valve 7, an electronically controlled digital display precision pressure gauge 8, a signal circuit 9, and a return water valve 10.

[0051] 12, a support frame for the vehicle body pipes to be tested, is used to place the pipes of the vehicle body to be tested.

[0052] The electrical control cabinet 4 is electrically connected to the electric low-flow test pump 5 and the electronically controlled digital display precision pressure gauge 8.

[0053] The electric low-flow test pump 5 and the electronically controlled digital display precision pressure gauge 8 are connected through the signal circuit 9;

[0054] The electric low-flow test pump 5, the PP cotton filter 6, and the first shut-off valve 7 are sequentially connected via a connecting pipe, and the electronically controlled digital display precision pressure gauge 8 is connected to the connecting pipe between the PP cotton filter 6 and the first shut-off valve 7; wherein...

[0055] The first end of the water supply pipe 19 is connected to the first end of the flange extension pipe 20, and the second end of the water supply pipe 19 is connected to the electric low-flow test pump 5.

[0056] The first end of the return water pipe 21 is connected to the inside of the test circulating water storage tank 3, and the second end of the return water pipe 21 is connected to the second end of the return water valve 10.

[0057] The first end of the return water valve 10 is connected to the first shut-off valve 7 and the electronically controlled digital display precision pressure gauge 8, and is equipped with a pressure-resistant hose 11. The free end of the pressure-resistant hose 11 is equipped with a special water injection connector 14.

[0058] One end of the transparent return water observation hose 17 is connected to the inside of the test circulating water storage tank 3, and the free end of the transparent return water observation hose 17 is sequentially connected to the second shut-off valve 16 and the special water outlet connector 15.

[0059] The bottom surface of the pressure holding and testing fixture body 1 is provided with multiple threaded fixing holes A;

[0060] The tooling also includes multiple pipe plugs B for blocking empty pipe openings in the pipes of the vehicle body under test.

[0061] In this embodiment, a combination of pressurizing equipment and a water tank, along with auxiliary components, is used to meet the pressure-holding test requirements of the water tank pipeline on the rail vehicle.

[0062] Furthermore, based on the above technical solution, the length direction of the flange extension pipe 20 is inside the test circulating water storage tank 3.

[0063] Furthermore, the test circulating water storage tank 3 is placed at the bottom inside the main body 1 of the pressure holding and testing fixture.

[0064] Furthermore, the operating height of the dedicated water inlet connector 14 is lower than that of the dedicated water outlet connector 15;

[0065] The operating height is the vertical height when connected to the pipeline of the vehicle body under test.

[0066] That is, as shown in the attached diagram of the instruction manual. Figure 1 As shown, the dedicated water inlet connector 14 is connected to one pipe opening of the vehicle body pipeline under test, while the dedicated water outlet connector 15 is connected to another pipe opening of the vehicle body pipeline under test. The remaining empty pipe openings of the vehicle body pipeline under test are blocked using pipe plug B.

[0067] More specifically, the dedicated water inlet connector 14 is connected to the pipe opening at the lowest point of the vehicle body pipe to be tested, while the dedicated water outlet connector 15 is connected to the pipe opening at the highest point of the vehicle body pipe to be tested.

[0068] Based on the technical solution of this application, the specific implementation is as follows:

[0069] As shown in the attached diagram of the instruction manual. Figure 1 As shown, the water pressure testing fixture provided in this application includes: a pressure testing fixture body 1, a pressure testing electrical module 2, a vehicle body pipeline support frame 12 under test, and various transmission pipelines and connectors.

[0070] The main body of the pressure holding test fixture 1 is divided into upper and lower layers. The upper layer is enclosed and holds tools and spare parts such as pipe joints, while the lower layer is open and holds the test circulating water storage tank 3.

[0071] Furthermore, the test circulating water storage tank 3 has a capacity of 20L, which meets the requirements of the test water pipeline. The top of the storage tank has three round openings, which are respectively connected to the water supply pipe 19, the return water pipe 21, and the transparent return water observation hose 17. A drain ball valve 18 is installed at the bottom of the storage tank.

[0072] Furthermore, the lower end of the water supply pipe is connected to a flange extension pipe 20, which is inserted into the water storage tank to ensure that water is drawn from the bottom of the water storage tank during water supply, thus ensuring continuous water supply and preventing the tank from running dry.

[0073] Furthermore, the pressure testing electrical module 2 draws test water from the water storage tank;

[0074] The pressure testing electrical module 2 is installed on the upper surface of the pressure holding and testing fixture body 1, and includes: an electrical control cabinet 4, an electric low-flow test pump 5, a PP cotton filter 6, a first shut-off valve 7, an electrically controlled digital display precision pressure gauge 8, a signal circuit 9, and a return water valve 10.

[0075] Furthermore, the electrical control cabinet 4 is an electrical control system that controls the switching and operation of the electric low-flow test pump 5 and receives the overpressure feedback signal from the electronically controlled digital display precision pressure gauge 8. The electrical control cabinet 4 is equipped with indicator lights, a power switch, a jog switch, a linkage switch, a stop switch, and an emergency stop switch.

[0076] Furthermore, the test vehicle body pipeline support frame 12 is used to support and fix the test vehicle body pipeline 13, and the test vehicle body pipeline 13 is required to be higher than the pressure electrical module 2 so that after the test, the water in the water tank and pipeline can flow back to the water storage tank smoothly by means of the height difference, so as to drain the water in the test vehicle body pipeline 13, while ensuring that the water in the water storage tank can be recycled.

[0077] Furthermore, after the electronic control system starts running, the electric low-flow test pressure pump 5 continuously draws test water from the bottom test circulating water storage tank 3. After passing through the PP cotton filter 6, the first shut-off valve 7, the electronically controlled digital display precision pressure gauge 8, the pressure-resistant hose 11, and the special water injection connector 14, the water is injected into the test vehicle body pipeline 13. The injection continues until the test vehicle body pipeline 13 gradually fills with water.

[0078] Furthermore, during the water injection process, the second shut-off valve 16 is in the open state, and the residual air in the test vehicle body pipeline 13 is discharged through the dedicated water outlet connector 15, the second shut-off valve 16, and the transparent return water observation hose 17.

[0079] Furthermore, when water flow is observed in the transparent return water observation hose 17, it indicates that the test vehicle body pipeline 13 is full and the residual air has been expelled, at which point the test conditions are initially met.

[0080] Furthermore, the second shut-off valve 16 is closed, and the pressure-pressurizing electrical module 2 begins to continuously pressurize the test vehicle body pipeline 13. The value of the electronically controlled digital display precision pressure gauge 8 is observed. When the pressure rises to the required pressure holding value, the first shut-off valve 7 is closed. At this time, a pressure holding test is performed, and a reasonable pressure drop range is allowed within the specified time.

[0081] Furthermore, the electronically controlled digital display precision pressure gauge 8 is used to display the pressure value during the water tank pressure test. It has an accuracy class of 0.5 and a range of 0 to 1 MPa. It also has overpressure protection. When the inlet water pressure exceeds the limit value, it sends a stop signal to the electrical control box 4 through the signal circuit 9 to stop the operation of the electric low-flow test pump 5, so as to protect the test vehicle body pipeline 13 and prevent the test vehicle body pipeline 13 from being deformed by overpressure.

[0082] Furthermore, after the pressure holding test is completed, the return water valve 10 and the second shut-off valve 16 are opened to allow the water in the test vehicle body pipeline 13 to flow back into the test circulating water storage tank 3. One end of the return water valve 10 is connected to the return water pipe 21, and the end of the return water pipe 21 is inserted into the storage tank. Finally, the water in the test vehicle body pipeline 13 is drained, and the test ends.

[0083] The above operations are used to meet the pressure holding test requirements of the rail vehicle pipeline.

[0084] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0085] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0086] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A water route pressure maintaining detection tool, characterized by, The testing fixture includes: The pressure holding test fixture body (1) is provided with a test circulating water storage tank (3) inside the pressure holding test fixture body (1). The top surface of the test circulating water storage tank (3) is connected to a transparent return water observation hose (17), a water supply pipe (19) and a return water pipe (21). A flange extension pipe (20) is provided inside the test circulating water storage tank (3). The first end of the flange extension pipe (20) is connected to the water supply pipe (19). The first end of the flange extension pipe (20) is close to the bottom of the test circulating water storage tank (3). A drain ball valve (18) is provided at the bottom of the side wall of the pressure holding test fixture body (1). The drain ball valve (18) is connected to the inside of the test circulating water storage tank (3). The pressure testing electrical module (2) is equipped with an electrical control cabinet (4), an electric low-flow test pump (5), a PP cotton filter (6), a first shut-off valve (7), an electronically controlled digital display precision pressure gauge (8), a signal circuit (9), and a return water valve (10). Support frame for the test vehicle body pipes (12) for placing the test vehicle body pipes; The electrical control cabinet (4) is electrically connected to the electric low-flow test pump (5) and the electronically controlled digital display precision pressure gauge (8); The electric low-flow test pump (5) and the electronically controlled digital display precision pressure gauge (8) are connected through the signal circuit (9); The electric low-flow test pump (5), the PP cotton filter (6), and the first shut-off valve (7) are connected in sequence through a connecting pipe, and the electrically controlled digital display precision pressure gauge (8) is connected to the PP cotton filter (6) and the first shut-off valve (7) through the connecting pipe; wherein, The first end of the water supply pipe (19) is connected to the first end of the flange extension pipe (20), and the second end of the water supply pipe (19) is connected to the electric low-flow test pump (5). The first end of the return water pipe (21) is connected to the inside of the test circulating water storage tank (3), and the second end of the return water pipe (21) is connected to the second end of the return water valve (10); The first end of the return water valve (10) is connected to the first shut-off valve (7) and the electronically controlled digital display precision pressure gauge (8), and is equipped with a pressure-resistant hose (11). The free end of the pressure-resistant hose (11) is equipped with a special water injection connector (14). One end of the transparent return water observation hose (17) is connected to the inside of the test circulating water storage tank (3), and the free end of the transparent return water observation hose (17) is connected to the second shut-off valve (16) and the special water outlet connector (15) in sequence. The pressure holding and testing fixture body (1) has multiple threaded fixing holes (A) on its bottom surface; The tooling also includes multiple pipe plugs (B) for blocking empty pipe openings in the pipes of the vehicle body under test.

2. The water pressure testing fixture as described in claim 1, characterized in that: The length of the flange extension pipe (20) is inside the test circulating water storage tank (3).

3. The water pressure testing fixture as described in claim 1, characterized in that: The test circulating water storage tank (3) is placed at the bottom inside the main body (1) of the pressure holding test fixture.

4. The water pressure testing fixture as described in claim 1, characterized in that: The operating height of the special water inlet connector (14) is lower than that of the special water outlet connector (15); The operating height is the vertical height when connected to the pipeline of the vehicle body under test.

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