Strength testing device for large blasting safety valve

Abstract

The invention provides a large blasting safety valve strength test device, which comprises a pressure regulating assembly, a plug, a sealing assembly and a pressing plate, and is characterized in that the pressure regulating assembly is in pipe connection with a valve cover and is communicated with the interior of a valve body, the pressure regulating assembly is used for increasing or releasing pressure into the valve body, and the plug is arranged in two oppositely arranged through holes in a penetrating manner to block a water inlet and a water outlet; the two sealing assemblies are arranged at the two ends of the chock plug in a sleeving mode and located between the chock plug and the inner wall of the through hole, the sealing assemblies are used for being matched with the chock plug to seal the water inlet and the water outlet, and the two pressing plates are fixedly arranged at the two ends of the chock plug and used for limiting the chock plug to move relative to the valve body in the axial direction; according to the strength test device for the large blasting safety valve, the water inlet and the water outlet are plugged through cooperation of the chock plug and the sealing assembly, the compression area of the end faces of the water inlet and the water outlet is reduced, the chock plug is further limited in cooperation with the pressing plate, it is guaranteed that the chock plug effectively plugs the water inlet and the water outlet all the time in the pressure test process, and the test efficiency is improved. And thread damage caused by threaded connection with the valve body is avoided.

Description

Technical Field

[0001] This application belongs to the field of safety valve testing technology, and in particular relates to a strength testing device for a large-scale burst safety valve. Background Technology

[0002] Nuclear-grade explosion safety valves need to be used in the high-temperature, high-humidity, and high-radiation environment of a nuclear island. Therefore, there are relatively high requirements for the strength and sealing performance of the valves.

[0003] Before or after maintenance, traditional pressure testing methods for nuclear-grade explosion safety valves typically include two forms: one is to install a plug plate at the valve's inlet and outlet using bolts, nuts, and other fasteners, and connect the valve cover to the valve body using fasteners, then pressurize the valve by connecting the valve cover end to the test pipeline; the other is to use a pressure testing machine to clamp the valve's inlet and outlet, and inject high-pressure medium into the valve through the testing machine's pipeline to perform a pressure test.

[0004] However, nuclear-grade explosion safety valves typically withstand pressures far exceeding those of ordinary valves during pressurization, falling into the ultra-high pressure category. Under traditional testing methods, the connection between the plug plate and the valve's inlet and outlet relies on bolt and nut tightening. When high-pressure media are injected into the valve body cavity, the threaded parts are prone to damage due to concentrated stress, severely affecting the valve's sealing reliability and reusability. Furthermore, when using a pressure testing machine to clamp the valve ends for pressurization, improper clamping parameters can easily cause localized deformation or surface damage to the valve body's inlet and outlet faces, reducing its structural integrity and sealing performance. Summary of the Invention

[0005] To address the shortcomings of related technologies, this application provides a large-scale burst safety valve strength testing device. The device uses a plug and a sealing assembly to seal the inlet and outlet, reducing the pressure area on the inlet and outlet end faces. Furthermore, a pressure plate is used to limit the plug, ensuring that the plug effectively seals the inlet and outlet during the pressure test, while avoiding thread damage caused by threaded connection with the valve body.

[0006] This application provides a strength testing device for a large-scale explosive safety valve. The large-scale explosive safety valve includes a valve body and a valve cover. The valve body is hollow and has at least three through holes. The valve cover is fixedly disposed on one of the through holes, and the other two through holes are respectively inserted through the side wall of the valve body to form an inlet and an outlet. The strength testing device for the large-scale explosive safety valve includes: A pressure regulating component is connected to the valve cover and communicates with the interior of the valve body. The pressure regulating component is used to increase or decrease pressure in the valve body. A plug is inserted into the two oppositely arranged through holes to seal the inlet and the outlet. The sealing components are respectively sleeved on both ends of the plug and located between the plug and the inner wall of the through hole. The sealing components are used to cooperate with the plug to seal the inlet and the outlet. The pressure plate is fixed at both ends of the plug and is used to restrict the movement of the plug relative to the valve body along its axial direction.

[0007] In some embodiments, the large-scale explosive safety valve strength testing device further includes: The stepped structure is located at both ends of the plug, and the sealing component is sleeved on the stepped structure. The stepped structure is used to cooperate with the pressure plate to restrict the movement of the sealing component relative to the plug.

[0008] In some embodiments, the enclosure component includes: A closed ring is fitted onto the stepped structure and located between the plug and the inner wall of the through hole; A first sealing ring is fitted onto the plug head, and the first sealing ring is located between the plug head and the closing ring.

[0009] In some embodiments, the enclosure component further includes: A second sealing ring, at least one of which is fitted onto the closing ring, is located between the closing ring and the inner wall of the through hole.

[0010] In some embodiments, the large-scale explosive safety valve strength testing device further includes: A first mounting groove is provided on the side wall of the plug near the end of the sealing ring, and the first mounting groove is used to install the first sealing ring.

[0011] In some embodiments, the large-scale explosive safety valve strength testing device further includes: The second mounting groove is located on the side wall of the sealing ring away from the end of the plug, and the second mounting groove is used to install the second sealing ring.

[0012] In some embodiments, the maximum outer diameter of the plug is smaller than the inner diameter of the inlet or the outlet, a preset gap is separated between the plug and the inner wall of the through hole, and the sealing component is sleeved on the plug to seal the preset gap.

[0013] In some embodiments, the valve cover is provided with a first access hole and a second access hole, and the pressure regulating assembly includes: A pumping device is connected to the first inlet hole, and the pumping device is used to pressurize the valve body. A pressure gauge is installed between the pump and the valve body connecting pipeline; The first shut-off valve is connected to the second inlet port, and the first shut-off valve is used to release pressure within the valve body.

[0014] In some embodiments, the voltage regulating component further includes: The second shut-off valve is connected to the first inlet port and is used to release pressure within the valve body.

[0015] In some embodiments, the voltage regulating component further includes: A check valve is installed between the pump and the valve body in the connecting pipeline.

[0016] In summary, this application provides a strength testing device for a large burst safety valve. It uses a plug and sealing assembly to seal the inlet and outlet, reducing the pressure-bearing area on the inlet and outlet faces. Furthermore, a pressure plate limits the plug's position, ensuring effective sealing of the inlet and outlet during the pressure test while preventing thread damage from threaded connections to the valve body. A stepped structure significantly reduces the plug's mass, and the lightweight sealing assembly facilitates assembly, reducing workload and time during installation. A pre-set gap between the plug and the inner wall of the through-hole allows for a certain tolerance during assembly, facilitating insertion of the plug into the inlet and outlet and improving installation convenience. It also avoids assembly difficulties or structural damage caused by overly tight fitting between the plug and the through-hole. The combination of a first and second sealing ring achieves double sealing, improving the safety of the large burst safety valve under high pressure, high temperature, or corrosive media conditions.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the connection structure of the large-scale explosive safety valve strength testing device of this application; Figure 2 For this application Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the valve body assembly of the large-scale explosive safety valve strength testing device of this application; Figure 4 This is a schematic diagram of the plug structure of the large-scale explosive safety valve strength testing device of this application; Figure 5 This is a schematic diagram of the closed-loop structure of the large-scale explosive safety valve strength testing device of this application.

[0019] 100. Pressure regulating assembly; 101. Pump pressure device; 102. Pressure gauge; 103. First shut-off valve; 104. Second shut-off valve; 105. Check valve; 200. Sealing assembly; 201. First sealing ring; 202. Second sealing ring; 203. Sealing ring; 300. Plug; 400. Pressure plate; 500. Stepped structure; 600. First mounting groove; 700. Second mounting groove; 800. Valve body; 801. Inlet; 802. Outlet; 900. Valve cover. Detailed Implementation

[0020] The technical solutions in 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. 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] In the description of this application, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "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 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. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first," "second," and "third" 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. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Reference Appendix Figures 1 to 5 , Figure 1 This is a schematic diagram of the connection structure of the large-scale explosive safety valve strength testing device of this application; Figure 2 For this application Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the valve body assembly of the large-scale explosive safety valve strength testing device of this application; Figure 4 This is a schematic diagram of the plug structure of the large-scale explosive safety valve strength testing device of this application; Figure 5 This is a schematic diagram of the closed-loop structure of the large-scale explosive safety valve strength testing device of this application; the specific embodiments are described below with reference to the above figures.

[0025] Reference Appendix Figure 1 and Figure 3 This application provides a strength testing device for a large-scale explosive safety valve, used to perform a pressure test on the large-scale explosive safety valve. The large-scale explosive safety valve includes a valve body 800 and a valve cover 900. The valve body 800 is hollow inside and has at least three through holes. The valve cover 900 is fixedly installed on one of the through holes, and the other two through holes are respectively inserted through the side wall of the valve body 800 to form an inlet 801 and an outlet 802. The strength testing device for the large-scale explosive safety valve includes a pressure regulating component 100, a plug 300, a sealing component 200, and a pressure plate 400.

[0026] The pressure regulating component 100 is connected to the valve cover 900 and communicates with the inside of the valve body 800. The pressure regulating component 100 is used to increase or decrease pressure in the valve body 800. The plug 300 is inserted into two oppositely arranged through holes to block the inlet 801 and the outlet 802. Two sealing components 200 are respectively sleeved on both ends of the plug 300 and located between the plug 300 and the inner wall of the through hole. The sealing components 200 are used to cooperate with the plug 300 to seal the inlet 801 and the outlet 802. Two pressure plates 400 are fixed at both ends of the plug 300. The pressure plates 400 are used to restrict the movement of the plug 300 relative to the valve body 800 along its axial direction.

[0027] Specifically, the large blasting safety valve includes a valve body 800 and a valve cover 900. The valve body 800 has a three-way structure, is hollow inside and has at least three through holes. The valve cover 900 is fixedly installed on one of the through holes, and the other two through holes are inserted through the side wall of the valve body 800 to form an inlet 801 and an outlet 802. The upper end face of the valve body 800 has sixteen threaded holes for threaded connection of the valve cover 900.

[0028] The valve cover 900 is provided with a first access hole and a second access hole, and a first connector and a second connector are respectively inserted into the first access hole and the second access hole, which connect the inside of the valve body 800 to the outside.

[0029] The pressure regulating assembly 100 is connected to the first and second connecting pipes on the valve cover 900 via pipelines, thereby communicating with the inner cavity of the valve body 800, and is used to apply pressure to the inside of the valve body 800 or to perform pressure relief operations.

[0030] The plug 300 is a cylindrical component. The plug 300 is inserted into two oppositely arranged through holes along a direction perpendicular to the axis of the valve body 800 to block the inlet 801 and the outlet 802, thereby reducing the pressure-bearing area of ​​the end faces of the inlet 801 and the outlet 802.

[0031] Two sealing components 200 are respectively sleeved on both ends of the plug 300 and located between the plug 300 and the inner wall of the through hole, used to seal the gap between the plug 300 and the through hole. The sealing components 200 and the plug 300 form a composite sealing structure to achieve complete sealing of the inlet 801 and the outlet 802.

[0032] The pressure plate 400 is a plate-shaped component, which is fixed at both ends of the plug 300. The pressure plate 400 can be fixed by threaded connection, slot structure or welding structure to achieve a balance between convenient disassembly and assembly and structural robustness.

[0033] The pressure plate 400 makes the overall outer diameter of the two ends of the plug 300 much larger than the inner diameter of the inlet 801 and the outlet 802, which is used to restrict the movement of the plug 300 relative to the valve body 800 in its axial direction.

[0034] In some embodiments, the pressure plate 400 is threadedly connected to the plug 300 by twelve bolts.

[0035] Reference Appendix Figures 1 to 3 In some embodiments, a limiting groove is provided at one end of the pressure plate 400 near the plug 300, so that the sealing component 200 is still located between the plug 300 and the pressure plate 400, which is used to restrict the movement of the sealing component 200 relative to the plug 300 along the axial direction, and to prevent the sealing component 200 from detaching from the plug 300.

[0036] Reference Appendix Figures 1 to 4 In some embodiments, the maximum outer diameter of the plug 300 is smaller than the inner diameter of the inlet 801 or the outlet 802, and there is a preset gap between the plug 300 and the inner wall of the through hole. The sealing component 200 is sleeved on the plug 300 to seal the preset gap.

[0037] Specifically, the maximum outer diameter of the plug 300 is smaller than the inner diameter of the inlet 801 or the outlet 802. The preset gap between the plug 300 and the inner wall of the through hole allows for a certain tolerance margin during assembly, making it easier to insert the plug 300 into the inlet 801 and the outlet 802 during assembly. This improves the ease of installation and avoids assembly difficulties or structural damage caused by the plug 300 being too tightly fitted to the through hole.

[0038] Two sealing components 200 are respectively fitted onto both ends of the plug head 300, thereby sealing the end of the preset gap away from the axis of the valve body 800 and preventing the pressure medium from leaking through the gap.

[0039] The composite sealing structure, consisting of the sealing component 200 and the plug 300, incorporates a preset gap and a flexible seal, enabling the sealing component to automatically adapt to slight dimensional changes or thermal expansion and contraction of the through hole, thus improving the adaptability and durability of the seal. Under high-pressure testing conditions, the composite sealing structure can effectively resist the damage to the sealing surface caused by pressure impact, ensuring the accuracy of test data and the safety of operation.

[0040] It should be noted that the sealing ring material in the sealing component 200 can be a high-resilience material to adapt to gap changes, and the size of the preset gap should be designed according to the material compression ratio and expansion properties of the sealing component.

[0041] Reference Appendix Figures 1 to 4 In some embodiments, a two-step structure 500 is provided at both ends of the plug 300, and the sealing component 200 is sleeved on the step structure 500. The step structure 500 is used to cooperate with the pressure plate 400 to restrict the movement of the sealing component 200 relative to the plug 300.

[0042] Specifically, the diameter of both ends of the plug 300 is reduced by machining, so that the two ends of the plug 300 form a stepped structure 500 with a height difference from the middle position. At the same time, the weight of the plug 300 is greatly reduced. Combined with the lighter sealing component 200, the sealing tooling formed by the two is easy to assemble, reducing the workload and working time increased by the weight of the tooling during installation.

[0043] The stepped structure 500 increases the distance between the plug 300 and the inner wall of the through hole, thereby increasing the assembly space between the plug 300 and the inner wall of the through hole, so that the sealing component 200 can be accurately fitted onto both ends of the plug 300 during assembly.

[0044] Furthermore, the stepped structure 500 is also used to limit the axial position of the sealing component 200 after assembly, preventing the sealing component 200 from sliding towards the center of the plug 300 or from detaching from the plug 300.

[0045] In addition, the two pressure plates 400 are fixed at opposite ends of the two stepped structures 500, so that the plug 300, the sealing component 200 and the pressure plate 400 form a clamping relationship. When the valve body 800 is filled with high pressure, the sealing component 200 can be prevented from slipping or being compressed and deformed, which would lead to sealing failure.

[0046] The stepped structure 500 further improves the installation stability and pressure resistance of the sealing component 200, prevents leakage due to displacement of the sealing component during high-pressure testing, and makes the stress on the sealing component 200 more uniform, which helps to extend the service life of the sealing component and maintain a stable sealing effect in multiple tests.

[0047] It should be noted that the height and diameter of the stepped structure 500 should be flexibly set according to the specifications of the sealing component 200 to adapt to different sealing requirements and installation space limitations.

[0048] Reference Appendix Figure 2 , Figure 3 as well as Figure 5 In some embodiments, the sealing assembly 200 includes a sealing ring 203, a first sealing ring 201, and a second sealing ring 202. The sealing ring 203 is sleeved on the stepped structure 500 and located between the plug 300 and the inner wall of the through hole. The first sealing ring 201 is sleeved on the plug 300 and located between the plug 300 and the sealing ring 203. At least one second sealing ring 202 is sleeved on the sealing ring 203 and located between the sealing ring 203 and the inner wall of the through hole.

[0049] Specifically, the materials used to make the closed ring 203 include, but are not limited to, stainless steel or aluminum alloy, to improve its mechanical strength and corrosion resistance.

[0050] The materials used to make the first sealing ring 201 and the second sealing ring 202 include, but are not limited to, highly elastic and pressure-resistant materials such as fluororubber and silicone, in order to effectively block the internal pressure of the valve body 800.

[0051] The structural forms of the first sealing ring 201 and the second sealing ring 202 include, but are not limited to, O-rings, V-rings, or rectangular cross-section rings, to adapt to different sealing requirements.

[0052] As the main structural component of the sealing assembly 200, the outer diameter of the sealing ring 203 fits the inner wall of the through hole, and the inner diameter is sleeved around the outside of the stepped structure 500 of the plug head 300, forming a stable installation state.

[0053] The closing ring 203 is used to limit and cooperate with the first sealing ring 201 and the second sealing ring 202 to bear pressure, so that the first sealing ring 201 and the second sealing ring 202 remain stable under high pressure, thereby preventing the high pressure medium from leaking through the gap between the plug 300 and the through hole.

[0054] Based on the assembly of the closing ring 203, a first sealing ring 201 is provided at the end of the closing ring 203 near the plug 300. The first sealing ring 201 is used to fill and press the gap between the closing ring 203 and the plug 300, forming a seal on the side of the closing ring 203 near the plug 300.

[0055] Based on the assembly of the closing ring 203, a second sealing ring 202 is provided at one end of the closing ring 203 near the inner wall of the through hole. The second sealing ring 202 is used to fill and press the gap between the closing ring 203 and the inner wall of the through hole, forming a seal on the side of the closing ring 203 near the inner wall of the through hole.

[0056] When the internal pressure of the valve body 800 increases, the first sealing ring 201 is used to prevent the pressure medium from seeping along the outer wall of the plug 300, while the second sealing ring 202 is used to prevent the pressure medium from leaking along the inner wall of the through hole. The first sealing ring 201 and the second sealing ring 202 work together to form a double sealing configuration, which improves the reliability and pressure resistance of the overall sealing system.

[0057] The first sealing ring 201 and the second sealing ring 202 work together to achieve double sealing inside and outside the closed ring 203, which improves the safety of large explosion safety valves under high pressure, high temperature or corrosive media.

[0058] It should be noted that the number of first sealing rings 201 and second sealing rings 202 should be increased according to the actual situation, so as to improve the redundant sealing capability of the sealing component 200 and maintain the system's sealing performance even if one of the first sealing rings 201 or second sealing rings 202 fails to seal.

[0059] Reference Appendix Figure 4 and Figure 5 In some embodiments, a first mounting groove 600 is provided on the side wall of the plug 300 near the end of the closing ring 203, and the first mounting groove 600 is used to install the first sealing ring 201; a second mounting groove 700 is provided on the side wall of the closing ring 203 away from the end of the plug 300, and the second mounting groove 700 is used to install the second sealing ring 202.

[0060] Specifically, the first mounting groove 600 and the second mounting groove 700 are annular structure grooves, which are machined on the outer wall of the plug 300 and the closing ring 203 by high-precision machining methods such as CNC lathe.

[0061] A first mounting groove 600 is pre-set on the side wall of the plug head 300 to provide a precise mounting position for the first sealing ring 201, so that it can be accurately positioned and kept stable during assembly; a second mounting groove 700 is machined on the outer peripheral side wall of the sealing ring 203 away from the plug head 300, so that the second sealing ring 202 can be accurately embedded in the groove during assembly, avoiding detachment or displacement caused by assembly deviation or external force.

[0062] The recessed structures of the first mounting groove 600 and the second mounting groove 700 are respectively used to ensure that the first sealing ring 201 and the second sealing ring 202 are not prone to axial displacement or radial extrusion in high pressure environment, effectively improving the stability and pressure resistance of the sealing structure.

[0063] It should be noted that the depths of the first mounting groove 600 and the second mounting groove 700 are matched with the compression ratios of the first sealing ring 201 and the second sealing ring 202, respectively, so that the first sealing ring 201 and the second sealing ring 202 have appropriate initial clamping force after assembly, and further enhance the sealing effect under the action of pressure medium.

[0064] Reference Appendix Figure 1 In some embodiments, the pressure regulating assembly 100 includes a pumping device 101, a pressure gauge 102, and a first shut-off valve 103. The pumping device 101 is connected to a first inlet port and is used to pressurize the valve body 800. The pressure gauge 102 is located between the pumping device 101 and the valve body 800. The first shut-off valve 103 is connected to a second inlet port and is used to depressurize the valve body 800.

[0065] Specifically, the pump pressure device 101 includes, but is not limited to, a manual hydraulic pump, an electric hydraulic pump, or a pneumatic pressurizing pump. The specific type of the pump pressure device 101 should be matched according to the test pressure level. The pressure gauge 102 includes, but is not limited to, a mechanical pointer type or a digital electronic type pressure gauge 102. The first shut-off valve 103 can adopt a plug valve, a needle valve, or an electromagnetic control structure to improve the ease of operation and sealing performance.

[0066] The pump pressure device 101 is used to continuously provide a stable pressure source, suitable for different pressure levels and test requirements. The pressure gauge 102 is used to record test data or to monitor pipeline pressure in real time. The first shut-off valve 103 is used to vent air during the test or to quickly release pressure after the test.

[0067] Before the test begins, the pipeline containing the first shut-off valve 103 is connected to the valve body 800 through the second connector installed in the second inlet hole, with the first shut-off valve 103 in the open state. The pump 101 is connected to the valve body 800 through the first connector installed in the first inlet hole. After the pump 101 is started, it injects liquid or gas pressure medium into the valve body 800. After all the air inside the valve body 800 is vented through the pipeline where the first shut-off valve 103 is located, the first shut-off valve 103 is closed, and the pressure medium is continuously injected into the valve body 800 to gradually increase its internal pressure; the pressure gauge 102 monitors the internal pressure of the valve body 800 in real time and provides pressure values ​​so that the operator can judge the system status.

[0068] Once the set test pressure is reached, the pressure is maintained for a period of time to test the strength and sealing performance of the valve body 800. After the test is completed, the pressure medium inside the valve body 800 is quickly discharged through the first shut-off valve 103 to achieve safe pressure relief of the system.

[0069] Reference Appendix Figure 1In some embodiments, the pressure regulating assembly 100 further includes a second shut-off valve 104, which is connected to the first inlet port and is used to release pressure within the valve body 800.

[0070] Specifically, the second shut-off valve 104 can be a plug valve, a needle valve, or an electromagnetic control structure to improve ease of operation and sealing performance.

[0071] An additional pressure relief path branching off from the first inlet port is added to the pipeline where the second shut-off valve 104 is located. By simultaneously or separately opening the first and second shut-off valves 104, the internal pressure medium is released from the first inlet port and the second inlet port respectively.

[0072] The dual-channel control mode formed by the second shut-off valve 104 and the first shut-off valve 103 enhances the reliability and redundancy of the pressure relief of the test device, and is particularly suitable for high-pressure environments or dangerous test scenarios that require rapid pressure relief.

[0073] In some embodiments, the pressure regulating assembly 100 further includes a check valve 105, which is disposed between the pumping device 101 and the valve body 800 connecting pipeline.

[0074] Specifically, the material of check valve 105 includes, but is not limited to, stainless steel, brass, or high-polymer corrosion-resistant materials to adapt to the transmission environment of high-pressure liquids or corrosive gases. Check valve 105 can be selected from spring-loaded, ball, and butterfly types, matched according to the type of medium and pressure rating. The installation methods of check valve 105 include, but are not limited to, threaded connections, flange connections, or quick-connect couplings to ensure its sealing reliability.

[0075] By installing a check valve 105 between the pump pressure device 101 and the valve body 800, the pressure medium can only enter the valve body 800 from the pump pressure device 101 in one direction, preventing the medium from flowing back to the pump pressure device 101 during the process of stopping pressurization or depressurizing the system, thus protecting the safety of the pump body structure and stabilizing the system pressure.

[0076] During the test, the pump 101 continuously supplies pressure to the valve body 800, and the check valve 105 opens after reaching the set opening pressure. When the pressure supply stops or the internal pressure is higher than the pump end, the check valve 105 automatically closes, thereby maintaining the pressure inside the valve body 800 and preventing reverse flow.

[0077] Check valve 105 is used to enhance the safety and pressure control accuracy of the test equipment during operation. Especially in high pressure or long-term pressure holding tests, check valve 105 can effectively prevent system instability or equipment damage caused by backflow and improve the reliability of test results.

[0078] Reference Appendix Figure 3In some embodiments, the assembly process of test components such as plug 300 is as follows: First, insert two first sealing rings 201 into the first mounting groove 600 of the plug head 300 near the end of the sealing ring 203, and then insert four second sealing rings 202 into the second mounting grooves 700 on the outer wall of the two sealing rings 203 respectively.

[0079] Next, insert the plug 300 equipped with the first sealing ring 201 into the inlet 801 and outlet 802 of the valve body 800 along a direction perpendicular to the axis of the valve body 800, ensuring that the two ends of the plug 300 are symmetrical, and then fit the two pre-installed second sealing rings 203 onto the stepped structures 500 at both ends of the plug 300.

[0080] Finally, the pressure plate 400 is fitted onto the outer surface of the closing ring 203, so that the closing ring 203 is located between the limiting groove of the pressure plate 400 and the plug 300. Axial clamping is achieved by passing twenty-four bolts through the through hole of the pressure plate 400 and screwing them into the threaded holes at both ends of the plug 300.

[0081] Reference Appendix Figure 1 The test procedure for the strength testing device of large-scale explosive safety valve is as follows: During the water injection and air release phase, the pump 101 is turned on, the second shut-off valve 104 is closed and the first shut-off valve 103 is turned on, so that the pump 101 continuously injects water into the valve body 800 until the water flow from the first shut-off valve 103 is stable. It is considered that all the gas in the valve body 800 has been released at this time.

[0082] During the pressurization and pressure holding stage, the first shut-off valve 103 is closed, and the pump 101 continuously pressurizes the valve body 800 until the pressure gauge 102 monitors the valve body 800 in real time and the test pressure is reached. Then the pump 101 is closed, and the test pressure is maintained in the valve body 800 for a period of time according to the test requirements. During this period, the changes in the shape of the valve body 800 and whether there is any water leakage at the inlet 801 and outlet 802 are observed. The dimensions of the valve body 800 are measured, and finally the test data is recorded.

[0083] During the safe pressure relief phase, the first shut-off valve 103 and the second shut-off valve 104 are opened to allow the water inside the valve body 800 to flow out, thereby achieving pressure relief.

[0084] This application provides a large-scale burst safety valve strength testing device. A plug 300, in conjunction with a sealing component 200, seals the inlet 801 and outlet 802, reducing the pressure-bearing area on the end faces of the inlet 801 and outlet 802. Furthermore, a pressure plate 400 limits the position of the plug 300, ensuring that the plug 300 effectively seals the inlet 801 and outlet 802 throughout the pressure test, while preventing thread damage due to threaded connection with the valve body 800. A stepped structure 500 significantly reduces the mass of the plug 300, and the lighter sealing component 200 further enhances the overall performance. The assembled closed fixture is easy to assemble, reducing the workload and time required for installation due to the weight of the fixture. By setting a preset gap between the plug 300 and the inner wall of the through hole, a certain tolerance margin is allowed in the assembly process, which facilitates the insertion of the plug 300 into the inlet 801 and outlet 802 during assembly, improving the ease of installation and avoiding assembly difficulties or structural damage caused by the plug 300 being too tightly fitted to the through hole. The cooperation of the first sealing ring 201 and the second sealing ring 202 achieves double sealing inside and outside the closed ring 203, improving the test safety of the large burst safety valve under high pressure, high temperature or corrosive media.

[0085] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] The above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A strength testing device for a large-scale explosive safety valve, wherein the large-scale explosive safety valve includes a valve body and a valve cover, the valve body is hollow and has at least three through holes, the valve cover is fixedly disposed on one of the through holes, and the other two through holes are respectively inserted through the side wall of the valve body to form an inlet and an outlet, characterized in that, The large-scale explosive safety valve strength testing device includes: A pressure regulating component is connected to the valve cover and communicates with the interior of the valve body. The pressure regulating component is used to increase or decrease pressure in the valve body. A plug is inserted into the two oppositely arranged through holes to seal the inlet and the outlet. The sealing components are respectively sleeved on both ends of the plug and located between the plug and the inner wall of the through hole. The sealing components are used to cooperate with the plug to seal the inlet and the outlet. The pressure plate is fixed at both ends of the plug and is used to restrict the movement of the plug relative to the valve body along its axial direction.

2. The large-scale explosive safety valve strength testing device according to claim 1, characterized in that, Also includes: The stepped structure is located at both ends of the plug, and the sealing component is sleeved on the stepped structure. The stepped structure is used to cooperate with the pressure plate to restrict the movement of the sealing component relative to the plug.

3. The large-scale explosive safety valve strength testing device according to claim 2, characterized in that, The enclosed component includes: A closed ring is fitted onto the stepped structure and located between the plug and the inner wall of the through hole; A first sealing ring is fitted onto the plug head, and the first sealing ring is located between the plug head and the closing ring.

4. The large-scale explosive safety valve strength testing device according to claim 3, characterized in that, The enclosure component also includes: A second sealing ring, at least one of which is fitted onto the closing ring, is located between the closing ring and the inner wall of the through hole.

5. The large-scale explosive safety valve strength testing device according to claim 3, characterized in that, Also includes: A first mounting groove is provided on the side wall of the plug near the end of the sealing ring, and the first mounting groove is used to install the first sealing ring.

6. The large-scale explosive safety valve strength testing device according to claim 4, characterized in that, Also includes: The second mounting groove is located on the side wall of the sealing ring away from the end of the plug, and the second mounting groove is used to install the second sealing ring.

7. The large-scale explosive safety valve strength testing device according to claim 1, characterized in that, The maximum outer diameter of the plug is smaller than the inner diameter of the inlet or outlet. There is a preset gap between the plug and the inner wall of the through hole. The sealing component is sleeved on the plug to seal the preset gap.

8. The large-scale explosive safety valve strength testing device according to any one of claims 1 to 7, characterized in that, The valve cover is provided with a first access hole and a second access hole, and the pressure regulating assembly includes: A pumping device is connected to the first inlet hole, and the pumping device is used to pressurize the valve body. A pressure gauge is installed between the pump and the valve body connecting pipeline; The first shut-off valve is connected to the second inlet port, and the first shut-off valve is used to release pressure within the valve body.

9. The large-scale explosive safety valve strength testing device according to claim 8, characterized in that, The voltage regulating component also includes: The second shut-off valve is connected to the first inlet port and is used to release pressure within the valve body.

10. The large-scale explosive safety valve strength testing device according to claim 9, characterized in that, The voltage regulating component also includes: A check valve is installed between the pump and the valve body in the connecting pipeline.

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