A special tool for safety valve test

Abstract

The present application relates to the technical fields of safety valve test, and disclose a kind of special tool for safety valve test, including: test base, and the safety valve body is set, and the both sides of safety valve body are connected with stud bolt;Joint, and outer end is connected with hydraulic pump, and pressure gauge is additionally provided between joint and hydraulic pump;Sealing gasket, set in the end of stud bolt and joint, and sealing gasket is respectively closely attached between test base and safety valve body.The special tool for safety valve test, by first stud bolt is additionally provided in the both sides of safety valve body, then the bottom end of stud bolt is connected with the threaded hole of test base, and washer and nut are additionally provided in the top end of stud bolt, then washer and joint are additionally provided in joint hole, and hydraulic pump and pressure gauge can be further matched with external detection equipment to carry out experiment on safety valve body.Solve the technical problem that high pressure test cannot be carried out due to poor sealing.

Description

Technical Field

[0001] This invention relates to the field of safety valve testing technology, specifically a special tooling for safety valve testing. Background Technology

[0002] A safety valve is a special valve whose opening and closing element is normally closed under external force. When the pressure of the medium in the equipment or pipeline rises above a specified value, it releases the medium to the outside of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. Safety valves are automatic valves, opening and closing automatically without manual operation. They are mainly used in boilers, pressure vessels, and pipelines to control pressure and ensure equipment and personnel safety. They must undergo pressure testing before use to ensure their reliability and safety. Safety valve testing is an important means of ensuring that safety valves can work reliably in critical situations. To ensure the accuracy, efficiency, and safety of the safety valve during testing, tooling is needed to ensure the stability and reliability of the safety valve during the test.

[0003] Common fixtures used for safety valve testing typically consist of a calibration platform, a gas supply unit, a control system, and a pressurization system. The calibration platform supports and secures the safety valve, ensuring stable operation during testing. The gas supply unit provides the required gas pressure for the test. It monitors and regulates the gas pressure during testing and usually includes components such as pressure gauges and high-precision pressure regulating valves. The pressurization system increases the gas pressure to meet the high-pressure requirements of safety valve testing.

[0004] Traditional safety valve testing relies on the fact that the safety valve in the diesel engine cylinder head assembly is designed to release high-pressure gases from the cylinder when abnormal combustion generates pressure exceeding the design limits, ensuring the safety of the diesel engine and cylinder. However, safety valves have complex internal structures, compact dimensions, and high operating pressures, making testing difficult and requiring extremely high-quality sealing fixtures, which can severely impact safety valve performance. Traditional safety valve testing fixtures often have poor sealing, failing to meet the demands of high-pressure testing and, consequently, the technical performance requirements of safety valves. Therefore, a specialized fixture for safety valve testing is proposed. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a specialized tooling for safety valve testing, thereby solving the technical problem that the tooling's poor sealing performance prevents it from meeting high-pressure testing requirements, let alone the technical performance testing requirements of safety valves.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a special tooling for safety valve testing, comprising:

[0009] The test base and the safety valve body located at the top center of the test base are provided. Double-ended bolts are connected to both sides of the safety valve body. The top of the test base is provided with threaded holes and connector holes, and the double-ended bolts are threadedly connected to the threaded holes. Nuts are connected to the ends of the double-ended bolts.

[0010] The connector is located on the outside of the test base, and the connector is connected to the connector hole. A hydraulic pump is connected to the outer end of the connector, and a pressure gauge is installed between the connector and the hydraulic pump.

[0011] Sealing gaskets are installed at the ends of the double-ended bolts and connectors, and these gaskets fit tightly against both the test base and the safety valve body. The process involves first attaching double-ended bolts to both sides of the safety valve body, then connecting the bottom of the bolts to the threaded holes of the test base, and finally placing a sealing gasket and nut at the top of the bolts. A sealing gasket and connector are then added at the connector hole. A hydraulic pump and pressure gauge can be used in conjunction with external testing equipment to test the safety valve body. This structure breaks with traditional testing methods and, combined with the performance characteristics of the safety valve body, verifies its sealing performance. This effectively verifies the sealing performance of the safety valve body, ensuring it meets technical performance requirements, achieving quality pre-control, improving work efficiency, reducing quality loss rates, and minimizing quality accidents caused by leakage from the conical surface of the safety valve body. This solution features a simple structure, low manufacturing and maintenance costs, an easy-to-understand working principle, and easy operation. It can effectively improve manufacturing efficiency, is highly practical, and is conducive to widespread promotion. It avoids the phenomenon that poor tooling sealing cannot meet high-pressure tests, let alone the technical performance tests of safety valves. At the same time, the special test tooling made of 45# steel can be used for repeated tests. In addition, the sealing gasket made of polytetrafluoroethylene can ensure the sealing of the safety valve body during the test.

[0012] Preferably, the connector has connecting cylinders installed on its front and back sides, and a guide rod is inserted into the center of the inner cavity of the connecting cylinder, with a compression spring sleeved on the surface of the guide rod. The guide rod can drive the compression spring to move along the connecting cylinder.

[0013] Preferably, the ends of the compression springs are tightly fitted to the surface of the guide rod and the inner wall of the connecting cylinder, respectively, and the ends of the guide rods extend inward through the outer walls of the connecting cylinder and the joint in sequence. Under the action of the compression springs, the guide rods move along the connecting cylinder, causing them to be inserted into the interior of the joint.

[0014] Preferably, the connector has limiting grooves at its front and rear ends, and a guide tube is added to the center of the connector's end. Limiting blocks are installed on the front and back of the guide tube, with the shape and position of the limiting blocks corresponding to the limiting grooves. The limiting blocks are inserted into a guide rod. After the guide tube is inserted into the connector's inner cavity, the limiting blocks enter the limiting grooves for connection, while the guide rod is inserted into the limiting blocks along the connector. This not only ensures the stability of the connection between the connector and the guide tube but also allows for individual replacement of the guide tube, facilitating disassembly and assembly. Furthermore, it eliminates the need for complete replacement if the hydraulic pump damages the connector, thus reducing experimental costs.

[0015] Preferably, the double-ended bolt has an extension post installed at its center, and an internal threaded groove is formed at the center of its end. Positioning sliders are added to both sides of the end of the double-ended bolt. The double-ended bolt can be connected to the extension post via the internal threaded groove and the positioning sliders.

[0016] Preferably, each end of the extension column is equipped with an externally threaded protrusion at its center, which is threadedly connected to an internally threaded groove. Positioning grooves are provided on both sides of the end of the extension column, and inlet / outlet holes are provided on both sides of the top of each positioning groove. The positioning grooves and inlet / outlet holes correspond to the size and position of the positioning slider. When the double-ended bolt is connected to the extension column, the positioning slider enters the positioning groove through the inlet / outlet hole, and the internally threaded groove contacts the externally threaded protrusion. Rotating the double-ended bolt allows the externally threaded protrusion to enter the internally threaded groove, thus connecting the double-ended bolt to the extension column. This not only facilitates the assembly and disassembly of the double-ended bolt and extension column but also allows for adjustment of the overall operating height of the double-ended bolt by replacing extension columns of different lengths. This enables the double-ended bolt to connect to safety valve bodies of different heights within a certain range, thereby enhancing the applicability of this structure.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a special tooling for safety valve testing, which has the following advantages:

[0019] 1. This special tooling for safety valve testing involves first attaching double-ended bolts to both sides of the safety valve body, then connecting the bottom of the double-ended bolts to the threaded holes of the test base, and adding washers and nuts to the top of the double-ended bolts. Finally, washers and connectors are added to the connector holes. The hydraulic pump and pressure gauge can then be used in conjunction with external testing equipment to test the safety valve body.

[0020] 2. This structure breaks with traditional testing methods, using specialized tooling to simultaneously perform sealing and release tests on the safety valve body. The safety valve tooling, made of 45# steel, can meet the testing requirements for high-pressure safety valves, including sealing and release tests. This solves the technical problem that ordinary testing tooling cannot perform high-pressure tests due to poor sealing, and therefore cannot meet the technical performance testing requirements of safety valves. Furthermore, the use of polytetrafluoroethylene (PTFE) gaskets optimizes the sealing performance of the safety valve tooling.

[0021] 3. This solution, through the combination of specialized tooling, can be applied to the testing and inspection of safety valves, improving the efficiency of the test, eliminating the quality problems of defective products leaving the factory, and effectively avoiding safety accidents caused by air leakage from the conical surface during the pressure test of the safety valve. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a top view of the structure of the test base of the present invention;

[0024] Figure 3 This is a side view of the connector structure of the present invention;

[0025] Figure 4 This is a schematic cross-sectional view of the separation of the double-headed bolt and the extension column of the present invention.

[0026] In the diagram: 1. Test base; 2. Threaded hole; 3. Connector hole; 4. Safety valve body; 5. Double-ended bolt; 6. Nut; 7. Sealing gasket; 8. Connector; 9. Pressure gauge; 10. Hydraulic pump; 11. Connecting cylinder; 12. Guide rod; 13. Compression spring; 14. Limiting groove; 15. Flow guide cylinder; 16. Limiting block; 17. Extension column; 18. Internal threaded groove; 19. Positioning slider; 20. External threaded protrusion; 21. Positioning slide; 22. Inlet / outlet hole. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] This invention provides a technical solution: a special tooling for testing safety valves, comprising: (see attached image) Figure 1 , Figure 2The test base 1 and the safety valve body 4 located at the top center of the test base 1 are provided. Double-ended bolts 5 are connected to both sides of the safety valve body 4. The top of the test base 1 is provided with threaded holes 2 and connector holes 3 respectively. The double-ended bolts 5 are threadedly connected to the threaded holes 2, and nuts 6 are connected to the ends of the double-ended bolts 5.

[0029] Connector 8 is located on the outside of test base 1 and is connected to connector hole 3. A hydraulic pump 10 is connected to the outer end of connector 8 and a pressure gauge 9 is installed between connector 8 and hydraulic pump 10.

[0030] A sealing gasket 7 is installed at the ends of the double-ended bolt 5 and the connector 8, and the sealing gasket 7 is tightly fitted to both the test base 1 and the safety valve body 4. The process involves first installing the double-ended bolt 5 on both sides of the safety valve body 4, then connecting the bottom end of the double-ended bolt 5 to the threaded hole 2 of the test base 1, and then adding a sealing gasket 7 and a nut 6 to the top of the double-ended bolt 5. Finally, a sealing gasket 7 and a connector 8 are added to the connector hole 3. The hydraulic pump 10 and pressure gauge 9 can then be used in conjunction with external testing equipment to conduct experiments on the safety valve body 4. This structure breaks with traditional testing methods and, combined with the performance characteristics of the safety valve body 4, verifies its sealing performance. This effectively verifies the sealing performance of the safety valve body 4, ensuring that it meets technical performance requirements, achieving quality pre-control, improving work efficiency, reducing quality loss rates, and minimizing quality accidents caused by leakage from the conical surface of the safety valve body 4. This solution features a simple structure, low manufacturing and maintenance costs, an easy-to-understand working principle, and easy operation. It can effectively improve manufacturing efficiency, is highly practical, and is beneficial for widespread promotion. It avoids the problem of poor tooling sealing, which prevents the testing from meeting high-pressure requirements and the technical performance testing of safety valves. At the same time, the special test tooling made of 45# steel can be used for repeated testing. In addition, the sealing gasket 7 made of polytetrafluoroethylene can ensure the sealing of the safety valve body 4 during the test.

[0031] Please see Figure 3Connecting cylinders 11 are installed on the front and back of connector 8, and a guide rod 12 is inserted into the center of the inner cavity of the connecting cylinder 11. A compression spring 13 is sleeved on the surface of the guide rod 12. The guide rod 12 can drive the compression spring 13 to move along the connecting cylinder 11. The end of the compression spring 13 is tightly fitted with the surface of the guide rod 12 and the inner wall of the connecting cylinder 11, and the end of the guide rod 12 extends inward through the outer wall of the connecting cylinder 11 and connector 8. Under the action of the compression spring 13, the guide rod 12 moves along the connecting cylinder 11 and is inserted into the interior of connector 8. Limiting grooves 14 are formed at the front and rear ends of the end of connector 8, and a flow guide cylinder 15 is added to the center of the end of connector 8. Limiting blocks 16 are installed on the front and back of the flow guide cylinder 15, and the shape and position of the limiting blocks 16 correspond to the limiting grooves 14. The limiting blocks 16 are inserted and connected to the guide rod 12. First, the guide tube 15 is inserted into the inner cavity of the connector 8, and then the limiting block 16 enters the limiting groove 14 for connection. At the same time, the guide rod 12 is inserted into the limiting block 16 along the connector 8. This not only ensures the connection stability between the connector 8 and the guide tube 15, but also allows the guide tube 15 to be replaced separately, achieving the effect of easy disassembly and assembly. At the same time, it eliminates the need for overall replacement when the hydraulic pump 10 damages the connector 8, thereby reducing experimental costs.

[0032] Please see Figure 4 An extension post 17 is installed at the center of the double-ended bolt 5, and an internal threaded groove 18 is formed at the center of the end of the double-ended bolt 5. Positioning sliders 19 are added to both sides of the end of the double-ended bolt 5. The double-ended bolt 5 can be connected to the extension post 17 through the internal threaded groove 18 and the positioning sliders 19. An external threaded protrusion 20 is installed at the center of the end of each extension post 17, and the external threaded protrusion 20 is threadedly connected to the internal threaded groove 18. Positioning grooves 21 are formed on both sides of the end of each extension post 17, and inlet / outlet holes 22 are formed on both sides of the top of each positioning groove 21. The size and position of the positioning grooves 21 and the inlet / outlet holes 22 correspond to the positioning sliders 19. When the double-ended bolt 5 is connected to the extension post 17, the positioning slider 19 enters the positioning groove 21 through the inlet / outlet hole 22, and the internal threaded groove 18 contacts the external threaded protrusion 20. Then, the double-ended bolt 5 is rotated, causing the external threaded protrusion 20 to enter the internal threaded groove 18, thus connecting the double-ended bolt 5 to the extension post 17. This not only facilitates the assembly and disassembly of the double-ended bolt 5 and the extension post 17, but also allows for adjustment of the overall working height of the double-ended bolt 5 by replacing the extension post 17 with different lengths. This enables the double-ended bolt 5 to connect to safety valve bodies 4 of different heights within a certain range, thereby enhancing the applicability of this structure.

[0033] This procedure involves first installing double-ended bolts 5 on both sides of the safety valve body 4, then connecting the bottom end of the double-ended bolts 5 to the threaded hole 2 of the test base 1, and adding a sealing gasket 7 and nut 6 to the top of the double-ended bolts 5. A sealing gasket 7 and connector 8 are then added to the connector hole 3. The hydraulic pump 10 and pressure gauge 9 can be used in conjunction with external testing equipment to test the safety valve body 4. After assembling the above tooling, use a special wrench to adjust the sealing pressure of the safety valve (without tripping) to reach the specified sealing pressure value. Maintain the specified pressure for 5 minutes without leakage. Conversely, leakage (a significant drop in the value of pressure gauge 9) indicates failure. Adjust the tripping pressure value to meet the safety valve's tripping requirements, tripping 1-2 times. Repeat the sealing test: maintain the specified pressure for 5 minutes without leakage. Conversely, leakage (a significant drop in the value of pressure gauge 9) indicates failure. First, the guide tube 15 is inserted into the inner cavity of the connector 8. Then, the limiting block 16 enters the limiting groove 14 for connection. Under the action of the compression spring 13, the guide rod 12 moves along the connecting tube 11, and is inserted into the interior of the connector 8 and the limiting block 16. When the double-ended bolt 5 is connected to the extension column 17, the positioning slider 19 enters the positioning groove 21 through the inlet / outlet hole 22, and the internal thread groove 18 and the external thread protrusion 20 come into contact. Then, the double-ended bolt 5 is rotated so that the external thread protrusion 20 enters the internal thread groove 18, thus connecting the double-ended bolt 5 and the extension column 17.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special tooling for testing safety valves, characterized in that, include: The test base (1) and the safety valve body (4) located at the center of the top of the test base (1) are provided. Double-ended bolts (5) are connected to both sides of the safety valve body (4). The top of the test base (1) is provided with threaded holes (2) and connector holes (3). The double-ended bolts (5) are threadedly connected to the threaded holes (2), and nuts (6) are connected to the ends of the double-ended bolts (5). The connector (8) is located on the outside of the test base (1), and the connector (8) is connected to the connector hole (3). A hydraulic pump (10) is connected to the outer end of the connector (8), and a pressure gauge (9) is installed between the connector (8) and the hydraulic pump (10). A sealing gasket (7) is provided at the ends of the double-ended bolt (5) and the connector (8), and the sealing gasket (7) is tightly fitted to the test base (1) and the safety valve body (4) respectively.

2. The special tooling for safety valve testing according to claim 1, characterized in that: The connector (8) has a connecting cylinder (11) installed on its front and back sides, and a guide rod (12) is inserted into the center of the inner cavity of the connecting cylinder (11), and a compression spring (13) is sleeved on the surface of the guide rod (12).

3. A special tooling for testing safety valves according to claim 2, characterized in that: The end of the compression spring (13) is tightly fitted to the surface of the guide rod (12) and the inner wall of the connecting cylinder (11), and the end of the guide rod (12) extends inward through the outer wall of the connecting cylinder (11) and the connector (8) in sequence.

4. A special tooling for testing safety valves according to claim 3, characterized in that: The connector (8) has a limiting groove (14) at the front and rear ends of the end center, and a guide cylinder (15) is added to the end center of the connector (8). Limiting blocks (16) are installed on the front and back of the guide cylinder (15), and the shape and position of the limiting block (16) correspond to the limiting groove (14). The limiting block (16) is inserted and connected to the guide rod (12).

5. A special tooling for testing safety valves according to claim 1, characterized in that: An extension post (17) is installed at the center of the double-ended bolt (5), and an internal thread groove (18) is opened at the center of the end of the double-ended bolt (5), and positioning sliders (19) are added on both sides of the end of the double-ended bolt (5).

6. A special tooling for testing safety valves according to claim 5, characterized in that: The extension column (17) is equipped with an external threaded protrusion (20) at the center of its end, and the external threaded protrusion (20) is threadedly connected to the internal threaded groove (18). A positioning slide groove (21) is provided on both sides of the end of the extension column (17), and an inlet and outlet hole (22) is provided on both sides of the top of the positioning slide groove (21). The size and position of the positioning slide groove (21) and the inlet and outlet hole (22) correspond to those of the positioning slider (19).

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