Safety valve testing system

Abstract

The present application relates to the technical field of safety valve, and particularly relates to a safety valve testing system, which comprises a first pressurizing unit, an energy storage unit and a second pressurizing unit, the liquid inlet end of the first pressurizing unit is adapted to be connected with a liquid tank, the first pressurizing unit is used for primary pressurizing a test medium, the energy storage unit is connected with the first pressurizing unit, the energy storage unit is used for storing the test medium discharged by the first pressurizing unit, one end of the second pressurizing unit is connected with the energy storage unit, the other end of the second pressurizing unit is adapted to be connected with a safety valve to be tested, and the second pressurizing unit is used for secondary pressurizing the test medium discharged by the energy storage unit. The safety valve testing system can improve the safety valve testing precision.

Description

Technical Field

[0001] This invention relates to the field of safety valve technology, and more specifically to a safety valve testing system. Background Technology

[0002] Safety valves are widely used in hydraulic systems, such as mining hydraulic supports and large lifting equipment. Testing safety valves requires high test pressures, which the liquid output from the pump in the supply tank cannot achieve. Existing testing systems cannot reliably provide the required discharge pressure and flow rate, affecting the accuracy of safety valve testing. Summary of the Invention

[0003] This invention aims to at least partially address one of the technical problems in related technologies. To this end, embodiments of this invention provide a safety valve testing system that can improve the accuracy of safety valve testing.

[0004] The safety valve testing system of this invention includes: a first pressurization unit, the inlet of which is adapted to be connected to a liquid tank, the first pressurization unit being used to perform primary pressurization on the test medium; an energy storage unit connected to the first pressurization unit, the energy storage unit being used to store the test medium discharged by the first pressurization unit; and a second pressurization unit, one end of which is connected to the energy storage unit, the other end of which is adapted to be connected to the safety valve under test, the second pressurization unit being used to perform secondary pressurization on the test medium discharged by the energy storage unit.

[0005] The safety valve testing system of the present invention can improve the testing accuracy of safety valves.

[0006] In some embodiments, the first pressurization unit includes a first pressurization cylinder, a first check valve, a first liquid inlet component, and a second liquid inlet component. The first pressurization cylinder has a first piston rod, a large chamber, and a small chamber. The first inlet of the first liquid inlet component is connected to the outlet of the liquid tank, the first outlet of the first liquid inlet component is connected to the inlet of the liquid tank, and the second outlet of the first liquid inlet component is connected to the large chamber of the first pressurization cylinder.

[0007] The first inlet of the second liquid inlet component is connected to the outlet of the liquid tank, the second outlet of the second liquid inlet component is connected to the inlet of the first one-way valve, and the outlet of the first one-way valve is connected to the small cavity of the first booster cylinder.

[0008] In some embodiments, the energy storage unit includes a first energy storage group, an electric throttle valve, and a second check valve. The inlet of the first energy storage group is connected to the outlet of the second check valve, the inlet of the second check valve is connected to the first booster unit, the outlet of the first energy storage group is connected to the electric throttle valve, and the outlet of the electric throttle valve is connected to the second booster unit.

[0009] In some embodiments, the second booster unit includes a second booster cylinder, a third one-way valve, a fourth one-way valve, and a fifth one-way valve. The second booster cylinder has a second piston rod, a large chamber, and a small chamber. The large chamber of the second booster cylinder is connected to the energy storage unit.

[0010] The large chamber of the second booster cylinder is connected to the outlet of the third one-way valve, and the inlet of the third one-way valve is connected to the inlet of the liquid tank.

[0011] The small chamber of the second booster cylinder is connected to the outlet of the fourth check valve, the inlet of the fourth check valve is connected to the inlet of the fifth check valve, the outlet of the fifth check valve is connected to the outlet of the first check valve, and the outlet of the second booster cylinder is connected to the safety valve under test.

[0012] In some embodiments, the second booster unit further includes a speed sensor adapted to measure the movement speed of the piston rod inside the second booster cylinder to calculate the flow rate of the test medium output by the second booster cylinder.

[0013] In some embodiments, the system further includes a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is located at the outlet of the second booster cylinder and the second pressure sensor is located at the inlet of the safety valve to be tested.

[0014] In some embodiments, a two-way cartridge valve is further included, one end of which is connected to the outlet of the electric throttle valve, and the other end of which is connected to the inlet of the large cylinder of the second booster cylinder.

[0015] In some embodiments, a third pressure sensor is also included, one end of which is connected to the energy storage unit.

[0016] In some embodiments, a solenoid valve component is further included, which is connected to the first check valve, the second check valve, the third check valve, the fourth check valve, and the fifth check valve in a corresponding manner.

[0017] In some embodiments, the system further includes a first pump and a sixth check valve. One end of the first pump is connected to the safety valve to be tested, and the other end of the first pump is connected to the inlet of the sixth check valve. The outlet of the sixth check valve is connected to the inlet of the liquid tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a safety valve testing system according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram of the first energy storage unit.

[0020] Figure label:

[0021] First pressurization unit 1, first pressurization cylinder 11, first check valve 12, first liquid inlet component 13, second liquid inlet component 14

[0022] Energy storage unit 2, first energy storage group 21, electric throttle valve 22, second check valve 23, second energy storage group 24, first energy storage component 241, second energy storage component 242.

[0023] Second booster unit 3, second booster cylinder 31, third check valve 32, fourth check valve 33, fifth check valve 34

[0024] Two-way cartridge valve 4, third solenoid valve 41, third liquid inlet component 42.

[0025] Solenoid valve component 5 includes: first solenoid valve 51, second solenoid valve 52, fourth solenoid valve 53, fifth solenoid valve 54, sixth solenoid valve 55, and seventh solenoid valve 56.

[0026] Third pressure sensor 6, first pressure sensor 7, second pressure sensor 8, first pump 9, sixth check valve 10, liquid tank 20, second pump 30, safety valve under test 40. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figure 1 As shown, the safety valve testing system of this embodiment includes a first pressurization unit 1, an energy storage unit 2, and a second pressurization unit 3. The inlet end of the first pressurization unit 1 is adapted to be connected to the liquid tank 20. The first pressurization unit 1 is used to perform primary pressurization on the test medium. The energy storage unit 2 is connected to the first pressurization unit 1 and is used to store the test medium discharged from the first pressurization unit 1. One end of the second pressurization unit 3 is connected to the energy storage unit 2, and the other end of the second pressurization unit 3 is adapted to be connected to the safety valve 40 under test. The second pressurization unit 3 is used to perform secondary pressurization on the test medium discharged from the energy storage unit 2.

[0029] Specifically, such as Figures 1 to 2As shown, the inlet of the first pressurization unit 1 is connected to the liquid tank 20. The first pressurization unit 1 performs a first-stage pressurization on the test medium to output a first working medium at a preset pressure.

[0030] One end of the energy storage unit 2 is connected to the first pressurization unit 1 to store energy in the first working medium. One end of the second pressurization unit 3 is connected to the energy storage unit 2 to output a second working medium at a preset pressure using the first working medium. The other end of the second pressurization unit 3 is connected to the safety valve 40 under test to test the safety valve 40.

[0031] The safety valve testing system of this invention, by setting a first pressurization unit 1 and a second pressurization unit 3, can pressurize the test medium. Compared with the pressurization cylinder used in the prior art, the safety valve testing system of this invention can pressurize the test medium in two stages to increase the pressure of the test medium, avoiding the gradual decrease in the pressure of the test medium in the energy storage unit 2 during the test of the safety valve 40 under test, which would lead to a decrease in test accuracy, and thus improving the test accuracy of the safety valve.

[0032] In some embodiments, the first pressurization unit 1 includes a first pressurization cylinder 11, a first one-way valve 12, a first liquid inlet component 13, and a second liquid inlet component 14. The first pressurization cylinder 11 has a first piston rod, a large chamber, and a small chamber. The first inlet of the first liquid inlet component 13 is connected to the outlet of the liquid tank 20, the first outlet of the first liquid inlet component 13 is connected to the inlet of the liquid tank 20, and the second outlet of the first liquid inlet component 13 is connected to the large chamber of the first pressurization cylinder 11.

[0033] The first inlet of the second liquid inlet component 14 is connected to the outlet of the liquid tank 20, the first outlet of the second liquid inlet component 14 is connected to the inlet of the liquid tank 20, the second outlet of the second liquid inlet component 14 is connected to the inlet of the first one-way valve 12, and the outlet of the first one-way valve 12 is connected to the small cavity of the first booster cylinder 11.

[0034] Specifically, such as Figures 1 to 2 As shown, the outlet of the liquid tank 20 is connected to the first inlet of the first liquid inlet component 13, the second outlet of the first liquid inlet component 13 is connected to the large cavity of the first booster cylinder 11, the first inlet of the second liquid inlet component 14 is connected to the outlet of the liquid tank 20, the first outlet of the second liquid inlet component 14 is connected to the inlet of the liquid tank 20, the second outlet of the second liquid inlet component 14 is connected to the inlet of the first one-way valve 12, and the outlet of the first one-way valve 12 is connected to the small cavity of the first booster cylinder 11.

[0035] When the energy storage component needs to be filled with liquid, the first inlet of the first liquid inlet component 13 is connected to the second outlet. The liquid tank 20 enters the first liquid inlet component 13 through the first inlet. The second outlet of the first liquid inlet component 13 is connected to the large cavity of the first booster cylinder 11, thereby causing the first piston rod to move to the left to pressurize the test medium in the small cavity of the first booster cylinder 11. The test medium in the small cavity of the first booster cylinder 11 flows into the energy storage unit 2. After all the test medium in the small cavity of the first booster cylinder 11 has flowed into the energy storage unit 2, the second outlet of the first liquid inlet component 13 is connected to the first outlet of the first liquid inlet component 13, thereby pressurizing the test medium in the large cavity of the first booster cylinder 11. The test medium flows back to the liquid tank 20 through the first liquid inlet component 13. The outlet of the liquid tank 20 is connected to the first inlet of the second liquid inlet component 14. The liquid tank 20 introduces the test medium into the small cavity of the first booster cylinder 11 through the second liquid inlet component 14, thereby pushing the piston rod to move to the right. When the small cavity of the first booster cylinder 11 is filled with a sufficient amount of test medium, the second liquid inlet component 14 is closed. The first inlet and outlet of the first liquid inlet component 13 are connected, and the large cavity of the first booster cylinder 11 is filled with test medium. Then the piston rod of the first booster cylinder 11 moves to the left to pressurize the test medium in the small cavity of the first booster cylinder 11, thereby forming a liquid filling cycle for the energy storage component until the energy storage component is fully charged.

[0036] Furthermore, the safety valve testing system also includes a second pump 30, the inlet of which is connected to the outlet of the liquid phase, and the outlet of the second pump 30 is connected to the second inlet and the first inlet of the second liquid inlet component 14.

[0037] In some embodiments, the energy storage unit 2 includes a first energy storage group 21, an electric throttle valve 22, and a second check valve 23. The inlet of the first energy storage group 21 is connected to the outlet of the second check valve 23, the inlet of the second check valve 23 is connected to the first booster unit 1, the outlet of the first energy storage group 21 is connected to the electric throttle valve 22, and the outlet of the electric throttle valve 22 is connected to the second booster unit 3.

[0038] Specifically, such as Figures 1 to 2 As shown, the inlet of the second check valve 23 is connected to the small cavity of the first booster cylinder 11, and the outlet of the second check valve 23 is connected to the inlet of the first accumulator group 21. Thus, the first booster cylinder 11 can input the test medium to the first accumulator group 21 through the second check valve 23, and the second check valve 23 can also prevent the test medium of the first accumulator group 21 from flowing back to the small cavity of the first booster cylinder 11, thereby improving the stability and safety of the safety valve test system.

[0039] The outlet of the first accumulator group 21 is connected to the electric throttle valve 22. The electric throttle valve 22 adjusts the pressure and flow rate of the test medium output by the first accumulator group 21, thereby improving the stability and accuracy of the safety valve test.

[0040] In some embodiments, the second boosting unit 3 includes a second boosting cylinder 31, a third one-way valve 32, a fourth one-way valve 33, and a fifth one-way valve 34. The second boosting cylinder 31 has a piston rod, a large chamber, and a small chamber. The large chamber of the second boosting cylinder 31 is connected to the energy storage unit 2.

[0041] The large chamber of the second booster cylinder 31 is connected to the outlet of the third check valve 32, and the inlet of the third check valve 32 is connected to the inlet of the liquid tank 20.

[0042] The small chamber of the second booster cylinder 31 is connected to the outlet of the fourth check valve 33, the inlet of the fourth check valve 33 is connected to the inlet of the fifth check valve 34, the outlet of the fifth check valve 34 is connected to the outlet of the first check valve 12, and the outlet of the second booster cylinder 31 is connected to the safety valve 40 to be tested.

[0043] Specifically, such as Figures 1 to 2 As shown, the inlet of the large chamber of the second booster cylinder 31 is connected to the outlet of the electric throttle valve 22, the small chamber of the second booster cylinder 31 is connected to the outlet of the fourth check valve 33, the inlet of the fourth check valve 33 is connected to the inlet of the fifth check valve 34, the outlet of the fifth check valve 34 is connected to the outlet of the first check valve 12, and the outlet of the small chamber of the second booster cylinder 31 is connected to the safety valve 40 under test for testing. The outlet of the fifth check valve 34 is also connected to the small chamber of the first booster cylinder 11.

[0044] When conducting an impact pressure safety test, the first accumulator group 21 is adapted to charge the test medium into the large chamber of the second booster cylinder 31 through the electric throttle valve 22. Then, the piston cylinder of the second booster cylinder 31 moves downward to pressurize the test medium in the small chamber of the second booster cylinder 31. Then, the test medium in the small chamber of the second booster cylinder 31 flows into the safety valve 40 under test to test the safety valve 40. After the test, the outlet of the third check valve 32 is connected to the inlet, for example. The test medium in the large chamber of the second booster cylinder 31 flows into the liquid tank 20 through the third check valve 32. The outlet of the fourth check valve 33 is connected to the inlet, and the outlet of the fifth check valve 34 is also connected to the inlet. This allows the pressurized test medium in the small chamber of the first booster cylinder 11 to flow into the small chamber of the second booster cylinder. Once the small chamber of the second booster cylinder 31 is filled with test medium, the outlet of the third check valve 32 is disconnected from the inlet, and the outlet of the fourth check valve 33 and the fifth check valve 34 are also disconnected. Consequently, the test medium cannot flow from the outlet of the third check valve 32 to the inlet of the fourth check valve 33, nor from the outlet of the fourth check valve 33 to the inlet, nor from the outlet of the fifth check valve 34 to the inlet of the fourth check valve 33. This process continues the cyclic impact pressure safety test.

[0045] Optionally, the second booster unit 3 also includes a speed sensor, which is adapted to measure the moving speed of the piston rod inside the second booster cylinder 31 to calculate the flow rate of the test medium output by the second booster cylinder 31, thereby improving the accuracy of the safety valve test system.

[0046] In some embodiments, a first pressure sensor 7 and a second pressure sensor 8 are also included. The first pressure sensor 7 is located at the outlet of the second booster cylinder 31, and the second pressure sensor 8 is located at the inlet of the safety valve 40 to be tested.

[0047] Specifically, such as Figures 1 to 2 As shown, the first pressure sensor 7 is located at the outlet of the small chamber of the second booster cylinder 31 to monitor the pressure of the test medium output by the second booster cylinder 31. This allows adjustment of the piston rod's movement speed to regulate the pressure of the test medium at the outlet of the small chamber of the second booster cylinder 31, preventing the test pressure from exceeding or falling below the preset pressure range, thus improving the accuracy and safety of the safety valve testing system. The first pressure sensor 7 is also located at the inlet of the safety valve 40 under test to monitor the actual pressure of the test medium flowing into the safety valve 40, further improving the accuracy and safety of the safety valve testing system.

[0048] In some embodiments, a two-way cartridge valve 4 is also included, one end of which is connected to the outlet of the electric throttle valve 22, and the other end of which is connected to the inlet of the large cylinder of the second booster cylinder 31.

[0049] Specifically, such as Figures 1 to 2 As shown, the two-way cartridge valve 4 includes a third solenoid valve 41 and a third inlet component 42. The third solenoid valve 41 has an inlet and an outlet. The outlet of the electric throttle valve 22 is connected to the inlet of the third solenoid valve 41, and the outlet of the electric throttle valve 22 is connected to the inlet of the third inlet component 42. When it is necessary to fill the large chamber of the second booster cylinder 31 with liquid, the electric throttle valve 22 opens to connect the inlet and outlet of the third solenoid valve 41. The test medium enters the control port of the third inlet component 42 through the third solenoid valve 41, thereby connecting the outlet and inlet of the third inlet component 42, so that the test medium can enter the large chamber of the second booster cylinder 31 through the third inlet component 42. The third inlet component 42 is a hydraulically controlled directional valve, which improves the stability and safety of the safety valve testing system.

[0050] Optionally, a third pressure sensor 6 is also included. One end of the third pressure sensor 6 is connected to the energy storage unit 2. That is, the third pressure sensor 6 is located at the outlet of the first energy storage group 21, so as to monitor the test pressure at the outlet of the first energy storage group 21 and improve the accuracy and stability of the safety valve test system.

[0051] In some embodiments, the system further includes a solenoid valve component 5, which is connected in a one-to-one correspondence with the first check valve 12, the second check valve 23, the third check valve 32, the fourth check valve 33, and the fifth check valve 34.

[0052] Specifically, such as Figures 1 to 2 As shown, the solenoid valve component 5 includes a first solenoid valve 51, a second solenoid valve 52, a fourth solenoid valve 53, a fifth solenoid valve 54, and a sixth solenoid valve 55. The first solenoid valve 51 is connected to the control port of the first liquid inlet component 13 to control the first outlet or second outlet of the first liquid inlet component 13 to communicate with the first inlet of the first liquid inlet component 13.

[0053] The second solenoid valve 52 is connected to the control port of the first liquid inlet component 13 to control the first outlet or the second outlet of the first liquid inlet component 13 to connect with the first inlet of the first liquid inlet component 13.

[0054] The fourth solenoid valve 53 is connected to the fourth check valve 33 to control the connection between the outlet and inlet of the fourth check valve 33. The fifth solenoid valve 54 is connected to the fifth check valve 34 to control the connection between the outlet and inlet of the fourth check valve 33, so as to facilitate the first pressurizing unit 1 to fill or release liquid into the small chamber of the second pressurizing cylinder 31.

[0055] The safety valve testing system also includes a seventh solenoid valve 56, which is connected to the first check valve 12 to control the connection between the outlet and inlet of the first check valve 12. A sixth solenoid valve 55 is connected to the second check valve 23 to control the connection between the outlet and inlet of the second check valve 23. The connection between the seventh solenoid valve 56 and the first check valve 12 to control the connection between the outlet and inlet of the first check valve 12 can improve the stability and safety of the safety valve testing system when the first accumulator group 21 needs to release water. The connection between the sixth solenoid valve 55 and the second check valve 23 to control the connection between the outlet and inlet of the second check valve 23.

[0056] In some embodiments, the safety valve testing system further includes a first pump 9 and a sixth check valve 10. One end of the first pump 9 is connected to the safety valve 40 to be tested, and the other end of the first pump 9 is connected to the inlet of the sixth check valve 10. The outlet of the sixth check valve 10 is connected to the inlet of the liquid tank 20.

[0057] Specifically, such as Figures 1 to 2As shown, the safety valve testing system also includes a second accumulator group 24, which includes a first accumulator component 241 and a second accumulator component 242. The inlets of the first accumulator component 241 and the second accumulator component 242 are connected to the outlet of the small chamber of the second booster cylinder 31. The inlets and outlets of the first accumulator component 241 and the second accumulator component 242 are connected to the inlet of the safety valve 40 under test. The outlet of the safety valve 40 under test is connected to the first pump 9 to return the test medium after testing to the liquid tank 20 through the sixth check valve 10, thereby improving the stability and safety of the safety valve testing system.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0059] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safety valve testing system, characterized in that, include: The first pressurization unit has an inlet end adapted to be connected to a liquid tank and is used to pressurize the test medium in one stage. An energy storage unit is connected to the first booster unit and is used to store the test medium discharged by the first booster unit. The second pressurization unit has one end connected to the energy storage unit and the other end adapted to be connected to the safety valve under test. The second pressurization unit is used to perform secondary pressurization on the test medium discharged from the energy storage unit. The first booster unit includes a first booster cylinder, a first check valve, a first liquid inlet component, and a second liquid inlet component. The first booster cylinder has a first piston rod, a large chamber, and a small chamber. The first inlet of the first liquid inlet component is connected to the outlet of the liquid tank, the first outlet of the first liquid inlet component is connected to the inlet of the liquid tank, the second outlet of the first liquid inlet component is connected to the large chamber of the first booster cylinder, the first inlet of the second liquid inlet component is connected to the outlet of the liquid tank, the first outlet of the second liquid inlet component is connected to the inlet of the liquid tank, the second outlet of the second liquid inlet component is connected to the inlet of the first check valve, and the outlet of the first check valve is connected to the small chamber of the first booster cylinder.

2. The safety valve testing system according to claim 1, characterized in that, The energy storage unit includes a first energy storage group, an electric throttle valve, and a second check valve. The inlet of the first energy storage group is connected to the outlet of the second check valve, the inlet of the second check valve is connected to the first booster unit, the outlet of the first energy storage group is connected to the electric throttle valve, and the outlet of the electric throttle valve is connected to the second booster unit.

3. The safety valve testing system according to claim 2, characterized in that, The second booster unit includes a second booster cylinder, a third one-way valve, a fourth one-way valve, and a fifth one-way valve. The second booster cylinder has a first piston rod, a large chamber, and a small chamber. The large chamber of the second booster cylinder is connected to the energy storage unit. The large chamber of the second booster cylinder is connected to the outlet of the third one-way valve, and the inlet of the third one-way valve is connected to the inlet of the liquid tank. The small chamber of the second booster cylinder is connected to the outlet of the fourth check valve, the inlet of the fourth check valve is connected to the inlet of the fifth check valve, the outlet of the fifth check valve is connected to the outlet of the first check valve, and the outlet of the second booster cylinder is connected to the safety valve under test.

4. The safety valve testing system according to claim 3, characterized in that, The second booster unit further includes a speed sensor adapted to measure the movement speed of the piston rod inside the second booster cylinder in order to calculate the flow rate of the test medium output by the second booster cylinder.

5. The safety valve testing system according to claim 3, characterized in that, It also includes a first pressure sensor and a second pressure sensor, the first pressure sensor being located at the outlet of the second booster cylinder and the second pressure sensor being located at the inlet of the safety valve to be tested.

6. The safety valve testing system according to claim 5, characterized in that, It also includes a two-way cartridge valve, one end of which is connected to the outlet of the electric throttle valve, and the other end of which is connected to the inlet of the large cylinder of the second booster cylinder.

7. The safety valve testing system according to claim 3, characterized in that, It also includes a third pressure sensor, one end of which is connected to the energy storage unit.

8. The safety valve testing system according to claim 3, characterized in that, It also includes a solenoid valve component, which is connected to the first check valve, the second check valve, the third check valve, the fourth check valve and the fifth check valve in a corresponding manner.

9. The safety valve testing system according to claim 1, characterized in that, It also includes a first pump and a sixth check valve. One end of the first pump is connected to the safety valve to be tested, and the other end of the first pump is connected to the inlet of the sixth check valve. The outlet of the sixth check valve is connected to the inlet of the liquid tank.

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