Safety valve performance testing device with environment working condition simulation function

Abstract

This invention discloses a safety valve performance testing device with environmental condition simulation function, belonging to the field of safety valve performance testing technology. The testing device is used to test safety valves and includes a support device, a temperature control device, a flow guiding device, and a booster pump. The support device is used to fix the safety valve. The temperature control device is connected to the support device. The temperature control device and the booster pump are used to simulate environmental conditions for the safety valve. The booster pump is connected to the safety valve pipeline through the flow guiding device. The flow guiding device and the support device are tightly connected, and the flow guiding device is in contact with the inner wall of the safety valve inlet. Different temperatures and types of fluids are supplied through the temperature control device and pressurized by the booster pump, thereby performing environmental condition simulation testing. The flow guiding device guides the flow of various fluids and simultaneously assists in supporting and sealing the safety valve. By being in contact with the inner wall of the safety valve inlet, the contact area is increased, further improving the sealing performance.

Description

Technical Field

[0001] This invention relates to the field of safety valve performance testing technology, specifically a safety valve performance testing device with environmental condition simulation function. Background Technology

[0002] Safety valves are important safety accessories used in closed systems to protect the system's safety. When the pressure in the equipment within the closed system exceeds the design pressure, they automatically open and close to discharge the overpressure medium, preventing excessive pressure from affecting equipment safety.

[0003] Currently, the performance of safety valves needs to be tested during the design and development process. However, due to the harsh operating conditions of safety valves, which are often used in high-temperature, high-pressure, and corrosive media environments, conventional testing equipment has a limited testing range and cannot test the performance data of safety valves under different environmental conditions, thus affecting the reference value of the test results.

[0004] Furthermore, since safety valves involve both design and production testing, conventional testing equipment is inconvenient to use for clamping during continuous testing. It only uses the positive pressure of the jaws to clamp the flange of the safety valve. Due to the small clamping area and the inability to remove impurities, the sealing performance of the clamping greatly affects the test accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a safety valve performance testing device with environmental condition simulation function to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A safety valve performance testing device with environmental condition simulation function is disclosed. The testing device is used to test the safety valve. The testing device includes a support device, a temperature control device, a flow guiding device, and a booster pump. The support device is used to fix the safety valve. The temperature control device is connected to the support device. The temperature control device and the booster pump are used to simulate the environmental conditions of the safety valve. The booster pump is connected to the safety valve pipeline through the flow guiding device. The flow guiding device and the support device are tightly connected. The flow guiding device is in contact with the inner wall of the safety valve inlet.

[0008] The support device serves as the main installation component, used to install other devices. It supplies fluids of different temperatures and types through a temperature control device and pressurizes them through a booster pump for environmental condition simulation testing. The flow guiding device guides the flow of various fluids and also assists in supporting and sealing the safety valve. By fitting closely to the inner wall of the safety valve inlet, the contact area is increased, further improving the sealing performance.

[0009] Furthermore, the support device includes a cabin and a clamping assembly. The cabin has a working chamber, and a safety valve is placed inside the working chamber. The cabin has a sliding groove, and the clamping assembly is placed inside the sliding groove. The clamping assembly is used to limit the safety valve in one direction. The temperature control device includes a heater and a refrigerator. The cabin has an adjustment chamber, and a booster pump is placed inside the adjustment chamber. The heater and refrigerator are respectively connected to the booster pump pipeline. The flow guiding device includes an extension pipe and a drive cylinder. The cabin has a flow guiding port, and the booster pump outlet is connected to the flow guiding port. The end of the flow guiding port is connected to the extension pipe pipeline. The drive cylinder is fastened to the cabin, and the output end of the drive cylinder is fastened to the extension pipe.

[0010] The chamber comprises a main body and a hatch. Its movable design keeps the hatch closed during testing to prevent media leakage. A working chamber on the chamber provides the testing space. During testing, a safety valve is placed within the working chamber and is unidirectionally limited by a clamping assembly, with an auxiliary limiting device. A heater and a chiller supply refrigerant and hot media, respectively. For high-temperature testing, the heater is pressurized by a booster pump, sending the hot media into the safety valve for sealing and opening / closing performance testing. For low-temperature testing, the chiller, via a booster pump, sends refrigerant into the safety valve for performance testing. The connection between the booster pump and the safety valve is achieved through an extension tube. This extension tube, a telescopic design, is driven by a cylinder to insert into the safety valve inlet, ensuring the outer wall of the extension tube fits snugly against the inner wall of the safety valve inlet. This increases the contact area, improving local sealing performance and preventing localized leakage from affecting testing accuracy.

[0011] Furthermore, the extension tube includes several sections, which are sequentially nested together. The output end of the drive cylinder is fastened to the innermost section. A locking block is provided on the outside of the section, and an extension groove is provided on the inside of the section. The inner section is slidably connected to the extension groove of the outer section through the locking block. A pressing spring is provided on one side of the locking block, and the side of the pressing spring away from the locking block is fastened to the wall of the extension groove. A sealing gasket is provided on the outside of the section.

[0012] The extension tube comprises multiple sequentially nested sections, which can slide. These sections are guided by extension grooves and locking blocks. When the safety valve is placed in the working chamber, the clamping assembly pre-positions the valve, and then the drive cylinder outputs displacement outward, moving the innermost section. The innermost section, being the longest, is inserted into the guide port for fluid guidance. Adjacent sections are driven by locking blocks and compression springs. The inner section moves the outer section forward until a section with the same diameter as the safety valve inlet is inserted into the safety valve. The outer wall of the section with the same diameter makes surface contact with the safety valve inlet wall, increasing the sealing area and preventing air leakage that could affect detection accuracy. Simultaneously, a sealing gasket, made of flexible material, is used to further improve local sealing.

[0013] Furthermore, a groove is provided on the tube section, the sealing gasket is placed in the groove, and an annular compensation groove is provided on the outside of the sealing gasket.

[0014] During flow diversion: A section tube not larger than the inner diameter of the safety valve inlet is inserted into the safety valve inlet, with the sealing gasket abutting against the inner wall of the safety valve inlet; one end face of the section tube larger than the inner diameter of the safety valve inlet abuts against the side of the safety valve; the force exerted by the section tube larger than the inner diameter of the safety valve inlet on the safety valve is opposite to the horizontal force exerted by the clamping assembly on the safety valve.

[0015] The tube segment is fixed to the inner ring of the sealing gasket by a groove. Several annular compensation grooves are set on the sealing gasket. The outer diameter of the sealing gasket is larger than the outer diameter of the tube segment above it. When the tube segment moves axially, the safety valve inlet wall and the sealing gasket come into frictional contact, which causes the part between the compensation grooves to be deformed by force. The width of the compensation groove gradually increases with the direction of medium flow. When the tube segment of the same diameter moves forward, the amount of compression at each point is different. Because the outer compensation groove is smaller, the local force is increased, which increases the local sealing quality.

[0016] Furthermore, the clamping assembly includes two upper clamping jaws and two lower clamping jaws. The cabin is provided with four sliding grooves, which are arranged circumferentially along the guide port. Clamping cylinders are provided in the sliding grooves. The two lower clamping cylinders are fastened to the adjacent lower clamping jaws, and the two upper clamping cylinders are fastened to the adjacent upper clamping jaws. The upper clamping jaws are provided with guide grooves, which are arranged vertically. The lower clamping jaws are provided with pressure-bearing grooves, which are arranged in an arc shape. The bottom side of the pressure-bearing grooves abuts against the lower end of the flange of the safety valve.

[0017] The upper and lower jaws simultaneously limit the movement of the safety valve's flange. A vertically positioned guide groove allows the flange to slide in from the top and into the pressure-bearing groove, increasing the clamping speed. A clamping cylinder drives the upper and lower jaws, suitable for safety valves of different specifications. During clamping, the force applied by the upper and lower jaws to the safety valve is opposite to the force applied by the uninserted section of the pipe to the flange, thus achieving axial positioning.

[0018] Furthermore, the temperature control device also includes a detection component and a movable support. One end of the movable support is fixedly connected to the wall of the working chamber, and the other end is fixedly connected to the detection component.

[0019] The detection assembly includes a pressure-sensing base, a piezoelectric element, a lower temperature-sensing element, and a transmission ring. The pressure-sensing base has a drainage channel, and a pressure-sensing cavity is set on the outer ring of the drainage channel. The piezoelectric element is set inside the pressure-sensing cavity. One end of the lower temperature-sensing element is fastened to the transmission ring. The piezoelectric element is made of piezoelectric ceramic material.

[0020] The movable bracket adopts a telescopic structure, which can move vertically to move the detection component and prevent it from affecting the safety valve's fixation. During detection, it is fixed by a snap-fit ​​structure to keep the detection component stationary. The lower temperature sensing plate is used for transmission. When the safety valve is depressurized, the fluid impacts the lower temperature sensing plate and drives the transmission ring to move upward. The transmission ring is guided by the pressure sensing chamber. When the transmission ring moves to the upper end of the pressure sensing chamber, it squeezes the piezoelectric element. Under the action of mechanical stress, the internal positive and negative charge centers are relatively displaced and polarized. Under the action of the piezoelectric effect, a current is generated, thereby detecting the response rate of the safety valve.

[0021] Furthermore, the detection component also includes an upper temperature sensing plate, one end of which is fastened to the transmission ring, and the lower side of the upper temperature sensing plate is fastened to the lower temperature sensing plate. The transmission ring is provided with a temperature measuring chamber, and temperature sensing plates are provided on the upper and lower sides of the temperature measuring chamber. The temperature sensing plates are made of piezoelectric ceramic material. One end of the upper temperature sensing plate and the lower temperature sensing plate are inserted between the two temperature sensing plates. The upper temperature sensing plate and the lower temperature sensing plate have different coefficients of thermal expansion.

[0022] Using upper and lower temperature sensing plates with different coefficients of thermal expansion, when the fluid medium comes into contact with the upper and lower temperature sensing plates, it deforms through heat exchange. If the temperature is higher, it bends in the direction with a smaller coefficient of thermal expansion, and if the temperature is lower, it bends in the direction with a larger coefficient of thermal expansion. During the bending process, pressure is applied to the two temperature sensing plates respectively. Due to the use of piezoelectric ceramic material, piezoelectric current is generated. By monitoring the temperature in real time, the response rate of the safety valve at different temperatures is detected.

[0023] As an optimization, the temperature control device also includes a riser pipe, which is connected to the outlet of the drainage channel. By setting up the riser pipe, the leaked fluid medium is collected when the safety valve is depressurized, preventing it from dispersing in the air and affecting the safety of the operators.

[0024] As an optimization, the riser pipe is connected to both the heater and the refrigerator at its end. The riser pipe has a dual-port design, which is switched by valves to connect to the heater and the refrigerator respectively, thereby recycling the low-temperature and high-temperature fluids and reducing energy consumption.

[0025] Compared with the prior art, the beneficial effects of this invention are as follows: The extension tube adopts a telescopic tube design and is driven by a drive cylinder to insert the extension tube into the inlet of the safety valve, so that the outer wall of the extension tube and the inner wall of the safety valve inlet are in contact, increasing the contact area and thus improving the local sealing performance, preventing local leakage from affecting the detection accuracy; the inner ring section tube drives the outer ring section tube forward until a section tube with the same diameter as the safety valve inlet is inserted into the safety valve, and the outer wall of the section tube with the same diameter makes surface contact with the wall surface of the safety valve inlet, thereby increasing the sealing area through surface contact, thus preventing air leakage and affecting the detection accuracy; at the same time, by setting a sealing gasket, the sealing gasket can be made of flexible material, which can withstand force. The deformation further improves the local sealing performance. When the tube moves axially, the safety valve inlet wall and the sealing gasket come into frictional contact, causing the part between the compensation grooves to deform under stress. The width of the compensation groove gradually increases with the direction of medium flow. When the tube of equal diameter moves forward, the compression at each point is different. Because the outer compensation groove is smaller, the local stress increases, thus increasing the local sealing quality. When the transmission ring moves to the upper end of the pressure sensing chamber, it squeezes the piezoelectric sheet. Under the action of mechanical stress, the internal positive and negative charge centers are relatively displaced and polarized. Under the action of the piezoelectric effect, a current is generated, thereby detecting the response rate of the safety valve. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the flow guiding device of the present invention;

[0028] Figure 3 This is a schematic diagram of the clamping assembly structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the extension tube structure of the present invention;

[0030] Figure 5 for Figure 4 A magnified view of a portion of the view;

[0031] Figure 6 This is a schematic diagram of the upper and lower gripper structures of the present invention;

[0032] Figure 7 This is a schematic diagram of the sealing gasket structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the detection component structure of the present invention.

[0034] In the diagram: 1. Support device; 11. Cabin; 111. Adjustment chamber; 112. Slide groove; 113. Flow guide port; 114. Working chamber; 12. Clamping assembly; 121. Upper clamp; 1211. Guide groove; 122. Lower clamp; 1221. Pressure bearing groove; 123. Clamping cylinder; 2. Temperature control device; 21. Heater; 22. Refrigeration unit; 23. Detection assembly; 231. Pressure sensing seat; 2311. Pressure sensing chamber; 2312. Flow guide. 232. Piezoelectric element; 233. Upper temperature sensing element; 234. Lower temperature sensing element; 235. Transmission ring; 2351. Temperature measuring chamber; 236. Temperature sensing pressure plate; 24. Flow riser tube; 25. Movable bracket; 3. Flow guiding device; 31. Extension tube; 311. Section tube; 3111. Extension groove; 3112. Slot; 312. Slot; 313. Press spring; 314. Sealing gasket; 32. Drive cylinder; 4. Booster pump; 5. Safety valve. Detailed Implementation

[0035] 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.

[0036] Example: Figures 1-8 As shown, the present invention provides a technical solution for a safety valve performance testing device with environmental condition simulation function.

[0037] A safety valve performance testing device with environmental condition simulation function is provided. The testing device is used to test the safety valve 5. The testing device includes a support device 1, a temperature control device 2, a flow guiding device 3, and a booster pump 4. The support device 1 is used to fix the safety valve 5. The temperature control device 2 is connected to the support device 1. The temperature control device 2 and the booster pump 4 are used to simulate the environmental conditions of the safety valve 5. The booster pump 4 is connected to the safety valve 5 through the flow guiding device 3. The flow guiding device 3 and the support device 1 are tightly connected. The flow guiding device 3 is in contact with the inner wall of the inlet of the safety valve 5.

[0038] The support device 1 serves as the main installation body, used to install other devices. It supplies fluids of different temperatures and types through the temperature control device 2 and pressurizes them through the booster pump 4 to conduct environmental condition simulation testing. The flow guiding device 3 guides the flow of each fluid and also assists in supporting and sealing the safety valve 5. By fitting against the inner wall of the inlet of the safety valve 5, the contact area is increased, further improving the sealing performance.

[0039] Furthermore, the support device 1 includes a cabin 11 and a clamping assembly 12. The cabin 11 is provided with a working chamber 114, and the safety valve 5 is placed in the working chamber 114. The cabin 11 is provided with a sliding groove 112, and the clamping assembly 12 is placed in the sliding groove 112. The clamping assembly 12 is used to limit the safety valve 5 in one direction. The temperature control device 2 includes a heater 21 and a refrigerator 22. The cabin 11 is provided with an adjustment chamber 111, and the booster pump 4 is placed in the adjustment chamber 111. The heater 21 and the refrigerator 22 are respectively connected to the booster pump 4 through pipes. The flow guiding device 3 includes an extension pipe 31 and a drive cylinder 32. The cabin 11 is provided with a flow guiding port 113, and the outlet of the booster pump 4 is connected to the flow guiding port 113. The end of the flow guiding port 113 is connected to the extension pipe 31 through pipes. The drive cylinder 32 is fastened to the cabin 11, and the output end of the drive cylinder 32 is fastened to the extension pipe 31.

[0040] The chamber 11 includes a main body and a hatch. Its movable design keeps the hatch closed during testing to prevent media leakage. The working chamber 114 on the chamber 11 provides testing space. During testing, the safety valve 5 is placed in the working chamber and is unidirectionally limited by the clamping assembly 12, with the flow guiding device 3 providing auxiliary limiting. The heater 21 and the refrigerator 22 supply refrigerant and heat transfer fluid, respectively. During high-temperature testing, the heater 21 is pressurized by the booster pump 4, sending the heat transfer fluid into the safety valve 5 for sealing and opening / closing performance testing. During low-temperature testing, the refrigerator 22, through the booster pump 4, sends refrigerant into the safety valve 5 for performance testing. The connection between the booster pump 4 and the safety valve 5 is achieved by introducing the detection medium into the safety valve 5 through the extension tube 31. The extension tube 31 adopts a telescopic tube design and is driven by the drive cylinder 32 to insert the extension tube 31 into the inlet of the safety valve 5, so that the outer wall of the extension tube 31 and the inner wall of the inlet of the safety valve 5 fit together, thereby increasing the contact area and improving the local sealing performance to prevent local leakage from affecting the detection accuracy.

[0041] Furthermore, the extension tube 31 includes several sections 311, which are sequentially nested together. The output end of the drive cylinder 32 is fastened to the innermost section 311. A locking block 312 is provided on the outside of the section 311, and an extension groove 3111 is provided on the inside of the section 311. The inner section 311 is slidably connected to the extension groove 3111 of the outer section 311 through the locking block 312. A pressing spring 313 is provided on one side of the locking block 312. The side of the pressing spring 313 away from the locking block 312 is fastened to the wall of the extension groove 3111. A sealing gasket 314 is provided on the outside of the section 311.

[0042] The extension tube 31 includes multiple sequentially nested sections 311. Adjacent sections 311 can slide, guided by the extension groove 3111 and the locking block 312. When the safety valve 5 is placed in the working chamber 114, the clamping assembly 12 pre-positions the safety valve 5, and then the drive cylinder 32 outputs displacement outward, driving the innermost section 311 to move. The innermost section 311 is the longest and is inserted into the guide port 113 for fluid guidance. Adjacent sections 311 are connected by the locking block. 312 and the compression spring 313 drive the inner ring tube 311 to move the outer ring tube 311 forward until the tube 311 with the same diameter as the inlet of the safety valve 5 is inserted into the safety valve 5. The outer wall of the tube 311 with the same diameter makes surface contact with the inlet wall of the safety valve 5. The surface contact increases the sealing area, thereby preventing air leakage and affecting the detection accuracy. At the same time, by setting a sealing gasket 314, which can be made of flexible material and can deform under force, the local sealing performance is further improved.

[0043] Furthermore, a slot 3112 is provided on the joint tube 311, and a sealing gasket 314 is placed in the slot 3112. An annular compensation groove is provided on the outside of the sealing gasket 314.

[0044] During diversion: The section tube 311, which is not larger than the inner diameter of the inlet of the safety valve 5, is inserted into the inlet of the safety valve 5. The sealing gasket 314 abuts against the inner wall of the inlet of the safety valve 5. The end face of the section tube 311, which is larger than the inner diameter of the inlet of the safety valve 5, abuts against the side of the safety valve 5. The direction of the force exerted by the section tube 311, which is larger than the inner diameter of the inlet of the safety valve 5, on the safety valve 5 is opposite to the direction of the horizontal force exerted by the clamping assembly 12 on the safety valve 5.

[0045] The tube segment 311 fixes the inner ring of the sealing gasket 314 through the slot 3112. The sealing gasket 314 is provided with several annular compensation grooves. The outer diameter of the sealing gasket 314 is larger than the outer diameter of the tube segment 311 above it. When the tube segment 311 moves axially, the inlet wall of the safety valve 5 and the sealing gasket 314 come into frictional contact, which causes the part between the compensation grooves to be deformed by force. The width of the compensation groove gradually increases with the direction of medium flow. When the tube segment 311 of the same diameter moves forward, the amount of compression at each point is different. Since the outer compensation groove is smaller, the local force is increased, which increases the local sealing quality.

[0046] Furthermore, the clamping assembly 12 includes two upper clamping jaws 121 and two lower clamping jaws 122. The cabin 11 is provided with four sliding grooves 112, which are arranged circumferentially along the guide port 113. Clamping cylinders 123 are provided in the sliding grooves 112. The two lower clamping cylinders 123 are fastened to the adjacent lower clamping jaws 122, and the two upper clamping cylinders 123 are fastened to the adjacent upper clamping jaws 121. The upper clamping jaws 121 are provided with guide grooves 1211, which are arranged vertically. The lower clamping jaws 122 are provided with pressure-bearing grooves 1221, which are arranged in an arc shape. The bottom side of the pressure-bearing grooves 1221 abuts against the lower end of the flange of the safety valve 5.

[0047] The flange of the safety valve 5 is simultaneously limited by the upper jaw 121 and the lower jaw 122. A vertically positioned guide groove 1211 allows the flange of the safety valve 5 to slide from the top of the guide groove 1211 and fall into the pressure-bearing groove 1221, improving the clamping speed. The clamping cylinder 123 drives the upper jaw 121 and the lower jaw 122 to move, suitable for safety valves of different specifications. During clamping, the force applied to the safety valve 5 by the upper jaw 121 and the lower jaw 122 is opposite to the force applied to the flange by the section pipe 311 not inserted into the inlet of the safety valve 5, thus achieving axial positioning.

[0048] Furthermore, the temperature control device 2 also includes a detection component 23 and a movable bracket 25. One end of the movable bracket 25 is fastened to the wall of the working chamber 114, and the other end is fastened to the detection component 23.

[0049] The detection component 23 includes a pressure-sensing base 231, a piezoelectric element 232, a lower temperature-sensing element 234, and a transmission ring 235. The pressure-sensing base 231 is provided with a drainage channel 2312, and a pressure-sensing cavity 2311 is provided on the outer ring of the drainage channel 2312. The piezoelectric element 232 is provided in the pressure-sensing cavity 2311. One end of the lower temperature-sensing element 234 is fastened to the transmission ring 235. The piezoelectric element 232 is made of piezoelectric ceramic material.

[0050] The movable bracket 25 adopts a telescopic structure and can move vertically to move the detection component 23, thus preventing it from affecting the fixation of the safety valve 5. During detection, it is fixed by a snap-fit ​​structure to keep the detection component 23 stationary. The transmission is achieved by setting a lower temperature sensing plate 234. When the safety valve 5 is depressurized, the fluid impacts the lower temperature sensing plate 234 and drives the transmission ring 235 to move upward. The pressure sensing chamber 2311 guides the transmission ring 235 to slide. When the transmission ring 235 moves to the upper end of the pressure sensing chamber 2311, it squeezes the piezoelectric plate 232. Under the action of mechanical stress, the internal positive and negative charge centers are relatively displaced and polarized. Under the action of the piezoelectric effect, a current is generated, thereby detecting the response rate of the safety valve 5.

[0051] Furthermore, the detection component 23 also includes an upper temperature sensing plate 233, one end of which is fastened to the transmission ring 235, and the lower side of the upper temperature sensing plate 233 is fastened to the lower temperature sensing plate 234. The transmission ring 235 is provided with a temperature measuring cavity 2351, and temperature sensing plates 236 are respectively provided on the upper and lower sides of the temperature measuring cavity 2351. The temperature sensing plates 236 are made of piezoelectric ceramic material. One end of the upper temperature sensing plate 233 and the lower temperature sensing plate 234 are inserted between the two temperature sensing plates 236. The upper temperature sensing plate 233 and the lower temperature sensing plate 234 have different coefficients of thermal expansion.

[0052] Using an upper temperature sensing plate 233 and a lower temperature sensing plate 234 with different coefficients of thermal expansion, when the fluid medium comes into contact with the upper temperature sensing plate 233 and the lower temperature sensing plate 234, it deforms through heat exchange. If the temperature is high, it bends in the direction with a smaller coefficient of thermal expansion, and if the temperature is low, it bends in the direction with a larger coefficient of thermal expansion. During the bending process, pressure is applied to the two temperature sensing plates 236 respectively. Since piezoelectric ceramic material is used, piezoelectric current is generated. By monitoring the temperature in real time, the response rate of the safety valve 5 at different temperatures is detected.

[0053] As an optimization, the temperature control device 2 also includes a riser pipe 24, which is connected to the outlet of the drain channel 2312. By setting up the riser pipe 24, the leaked fluid medium is collected when the safety valve is depressurized, preventing it from dispersing in the air and affecting the safety of the operator.

[0054] As an optimization, the end of the riser pipe 24 is connected to both the heater 21 and the refrigerator 22. The end of the riser pipe 24 has a dual interface, which is switched by a valve to connect to the heater 21 and the refrigerator 22 respectively, thereby recycling the low-temperature and high-temperature fluids and reducing energy consumption.

[0055] The working principle of this invention is as follows: The extension tube 31 adopts a telescopic tube design and is driven by the drive cylinder 32 to insert the extension tube 31 into the inlet of the safety valve 5, so that the outer wall of the extension tube 31 and the inner wall of the inlet of the safety valve 5 are in contact, increasing the contact area and thus improving the local sealing performance, preventing local leakage from affecting the detection accuracy; the inner ring section tube 311 drives the outer ring section tube 311 forward until the section tube 311 with the same diameter as the inlet of the safety valve 5 is inserted into the safety valve 5, and the outer wall of the section tube 311 with the same diameter makes surface contact with the inlet wall of the safety valve 5, thereby increasing the sealing area through surface contact, thus preventing air leakage and affecting the detection accuracy; at the same time, by setting a sealing gasket 314, which can be made of flexible material, the pressure is absorbed by the gasket. Deformation can occur, thereby further improving local sealing performance; when the section tube 311 moves axially, the inlet wall of the safety valve 5 and the sealing gasket 314 come into frictional contact, causing the part between the compensation grooves to be deformed by force. The width of the compensation groove gradually increases with the direction of medium flow. When the section tube 311 of the same diameter moves forward, the amount of compression at each point is different. Since the outer compensation groove is smaller, the local force increases, thereby increasing the local sealing quality; when the transmission ring 235 moves to the upper end of the pressure sensing chamber 2311, it squeezes the piezoelectric sheet 232. Under the action of mechanical stress, the internal positive and negative charge centers are relatively displaced and polarized. Under the action of piezoelectric effect, current is generated, thereby detecting the response rate of the safety valve 5.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety valve performance testing device with environmental condition simulation function, the testing device being used to test a safety valve (5), characterized in that: The testing device includes a support device (1), a temperature control device (2), a flow guiding device (3), and a booster pump (4). The support device (1) is used to fix the safety valve (5). The temperature control device (2) is connected to the support device (1). The temperature control device (2) and the booster pump (4) are used to simulate the environmental working conditions of the safety valve (5). The booster pump (4) is connected to the safety valve (5) through the flow guiding device (3). The flow guiding device (3) and the support device (1) are tightly connected. The flow guiding device (3) and the inner wall of the inlet of the safety valve (5) are in contact. The flow guiding device (3) includes an extension tube (31) and a drive cylinder (32); The extension tube (31) includes several sections (311), which are sequentially sleeved. The output end of the drive cylinder (32) is fastened to the innermost section (311). A locking block (312) is provided on the outside of the section (311), and an extension groove (3111) is provided on the inside of the section (311). The inner section (311) is slidably connected to the extension groove (3111) of the outer section (311) through the locking block (312). A pressing spring (313) is provided on one side of the locking block (312), and the side of the pressing spring (313) away from the locking block (312) is fastened to the wall of the extension groove (3111). A sealing gasket (314) is provided on the outside of the section (311). The section tube (311) is provided with a slot (3112), the sealing gasket (314) is placed in the slot (3112), and the outer side of the sealing gasket (314) is provided with an annular compensation groove. During diversion: a section tube (311) not larger than the inner diameter of the inlet of the safety valve (5) is inserted into the inlet of the safety valve (5), the sealing gasket (314) abuts against the inner wall of the inlet of the safety valve (5), one end face of the section tube (311) larger than the inner diameter of the inlet of the safety valve (5) abuts against the side of the safety valve (5), and the force applied by the section tube (311) larger than the inner diameter of the inlet of the safety valve (5) to the safety valve (5) is opposite to the horizontal force applied by the clamping assembly (12) to the safety valve (5); The temperature control device (2) also includes a detection component (23) and a movable bracket (25). One end of the movable bracket (25) is fastened to the wall of the working chamber (114), and the other end is fastened to the detection component (23). The detection component (23) includes a pressure-sensing base (231), a piezoelectric element (232), a lower temperature-sensing element (234), and a transmission ring (235). The pressure-sensing base (231) is provided with a drainage channel (2312). A pressure-sensing cavity (2311) is provided on the outer ring of the drainage channel (2312). A piezoelectric element (232) is provided inside the pressure-sensing cavity (2311). One end of the lower temperature-sensing element (234) is fastened to the transmission ring (235). The piezoelectric element (232) is made of piezoelectric ceramic material.

2. The safety valve performance testing device with environmental condition simulation function according to claim 1, characterized in that: The support device (1) includes a cabin (11) and a clamping assembly (12). The cabin (11) has a working chamber (114), and the safety valve (5) is placed in the working chamber (114). The cabin (11) has a sliding groove (112), and the clamping assembly (12) is placed in the sliding groove (112). The clamping assembly (12) is used to limit the safety valve (5) in one direction. The temperature control device (2) includes a heater (21) and a refrigerator (22). The cabin (11) has an adjustment mechanism. The chamber (111) is where the booster pump (4) is placed. The heater (21) and the refrigerator (22) are connected to the booster pump (4) via pipes. The cabin (11) is provided with a guide port (113). The outlet of the booster pump (4) is connected to the guide port (113). The end of the guide port (113) is connected to the extension pipe (31). The drive cylinder (32) is fastened to the cabin (11). The output end of the drive cylinder (32) is fastened to the extension pipe (31).

3. The safety valve performance testing device with environmental condition simulation function according to claim 2, characterized in that: The clamping assembly (12) includes two upper clamping jaws (121) and two lower clamping jaws (122). The cabin (11) is provided with four sliding grooves (112). The four sliding grooves (112) are arranged circumferentially along the guide port (113). The sliding grooves (112) are provided with clamping cylinders (123). The two lower clamping cylinders (123) are fastened to the adjacent lower clamping jaws (122). The two upper clamping cylinders (123) are fastened to the adjacent upper clamping jaws (121). The upper clamping jaws (121) are provided with guide grooves (1211). The guide grooves (1211) are arranged in the vertical direction. The lower clamping jaws (122) are provided with pressure-bearing grooves (1221). The pressure-bearing grooves (1221) are arranged in an arc shape. The bottom side of the pressure-bearing grooves (1221) abuts against the lower end of the flange of the safety valve (5).

4. The safety valve performance testing device with environmental condition simulation function according to claim 3, characterized in that: The detection component (23) also includes an upper temperature sensing plate (233), one end of which is fastened to a transmission ring (235), and the lower side of the upper temperature sensing plate (233) is fastened to a lower temperature sensing plate (234). The transmission ring (235) is provided with a temperature measuring cavity (2351), and temperature sensing plates (236) are provided on the upper and lower sides of the temperature measuring cavity (2351). The temperature sensing plates (236) are made of piezoelectric ceramic material. One end of the upper temperature sensing plate (233) and the lower temperature sensing plate (234) are inserted between the two temperature sensing plates (236). The upper temperature sensing plate (233) and the lower temperature sensing plate (234) have different coefficients of thermal expansion.

5. The safety valve performance testing device with environmental condition simulation function according to claim 4, characterized in that: The temperature control device (2) also includes a riser pipe (24), which is connected to the outlet of the drainage channel (2312).

6. The safety valve performance testing device with environmental condition simulation function according to claim 5, characterized in that: The end of the riser pipe (24) is connected to the heater (21) and the refrigerator (22) respectively.

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