Pilot operated safety valve testing device

Abstract

The pilot operated safety valve testing device comprises a supporting seat, a detector assembly, a cylinder seat and a clamping assembly, the detector assembly comprises a detector and a detection pipeline, the detector is connected with the detection pipeline, and the detection pipeline is provided with a detection opening used for being communicated with a connecting opening; the cylinder seat is connected with the supporting seat, the cylinder seat is provided with a cylinder cavity and a cylinder opening, and the detection opening is formed in the cylinder cavity and faces the cylinder opening; the clamping assembly comprises a plurality of clamping pieces, the clamping pieces are arranged on the outer side of the cylinder base, the multiple clamping pieces are arranged in the circumferential direction of the cylinder base at intervals, each clamping piece comprises a hinge part and a clamping part, the hinge parts are rotatably connected with the cylinder base, and the clamping parts are used for clamping a connecting flange of the pilot operated safety valve. According to the pilot operated safety valve testing device, the preparation time before testing and the disassembly time after testing can be greatly shortened, and the testing efficiency is high.

Description

Technical Field

[0001] This invention relates to the technical field of valve body performance testing devices, and specifically to a pilot-operated safety valve testing device. Background Technology

[0002] Pilot-operated safety valves are suitable for use in boilers, pressure vessels, and pipelines. They are safety valves that rely on the medium discharged from the pilot valve to drive or control the main valve. To ensure the normal use of pilot-operated safety valves, testing equipment is required to test them to check whether their sealing performance is up to standard.

[0003] In related technologies, when testing a pilot-operated safety valve using a testing device, the pilot-operated safety valve and the testing device need to be connected by flanges and bolts. When there are many pilot-operated safety valves to be tested, the bolts need to be disassembled and reassembled multiple times, making the operation steps cumbersome and the testing efficiency low. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a pilot-operated safety valve testing device, which can significantly shorten the preparation time before testing and the disassembly time after testing, and has high testing efficiency.

[0006] The pilot-operated safety valve testing device of this invention includes a support base, a detector assembly, a cylinder seat, and a snap-fit ​​assembly. The detector assembly includes a detector and a detection pipe, the detector being connected to the detection pipe, and the detection pipe having a detection port for communicating with the connection port. The cylinder seat is connected to the support base and has a cylinder cavity and a cylinder opening, with the detection port located within the cylinder cavity and facing the cylinder opening. The snap-fit ​​assembly includes multiple snap-fit ​​members located on the outside of the cylinder seat and spaced apart circumferentially along the cylinder seat. Each snap-fit ​​member includes a hinge portion and a snap-fit ​​portion, the hinge portion being rotatably connected to the cylinder seat, and the snap-fit ​​portion being used to snap-fit ​​the connection flange of the pilot-operated safety valve.

[0007] In some embodiments, the testing device further includes a stop assembly, which includes a stop member slidably connected to the cylinder seat along the axial direction of the cylinder seat and disposed at the cylinder opening; the stop member has a through hole and a stop surface, one end of the through hole is connected to the detection port, and the other end of the through hole forms a communication port for communicating with the connection port, the communication port being formed on the stop surface, and the stop surface being used to stop the sealing surface of the connecting flange.

[0008] In some embodiments, the stop assembly further includes a sealing ring arranged circumferentially along the communication opening, the sealing ring being disposed on the stop surface and connected to the stop member.

[0009] In some embodiments, the snap-fit ​​member includes an intersecting first segment and a second segment, the first segment extending in the same direction as the axial direction of the cylinder seat, the second segment extending from the first segment toward the cylinder seat, the portion of the first segment away from the second segment forming the hinge portion, the portion of the second segment away from the first segment forming the snap-fit ​​portion, the snap-fit ​​portion having a snap-fit ​​surface facing the cylinder opening, the snap-fit ​​surface being used to fit against the back of the connecting flange.

[0010] In some embodiments, the snap-fit ​​assembly further includes an anti-slip pad that conforms to the snap-fit ​​surface and is connected to the snap-fit ​​portion.

[0011] In some embodiments, the testing apparatus further includes a control component, the control component including a propulsion ring slidably fitted onto the cylinder seat; the propulsion ring has a first inclined surface, the locking member has a second inclined surface, the second inclined surface is located on the side of the hinge portion near the locking portion, the first inclined surface and the second inclined surface have the same inclination direction, the second inclined surface gradually moves away from the center line of the cylinder seat in the axial direction from the hinge portion to the locking portion, when the propulsion ring slides toward the locking member, the first inclined surface can fit against the second inclined surface so that the locking portion rotates toward the cylinder seat.

[0012] In some embodiments, the control assembly further includes a control ring and a retaining ring, the retaining ring being fitted onto the cylinder seat, the control ring being fitted onto the retaining ring, and the control ring being threadedly engaged with the retaining ring; the control ring is rotatably connected to the propulsion ring.

[0013] In some embodiments, the control assembly further includes a connecting frame, the cylinder seat having a clearance groove, the connecting frame passing through the clearance groove, the control ring being connected to one end of the connecting frame and rotatable relative to the connecting frame, and the other end of the connecting frame being connected to the stop member.

[0014] In some embodiments, the control ring is rotatably connected to the propulsion ring via a bearing; and / or, the control ring is rotatably connected to the connecting frame via a bearing.

[0015] In some embodiments, the connecting flange of the pilot-operated safety valve includes an inlet flange and an outlet flange, the cylinder seat and the snap-fit ​​assembly constitute a connecting structure, and there are multiple connecting structures, with at least two connecting structures respectively used to connect the inlet flange and the outlet flange.

[0016] The pilot-operated safety valve testing device of this invention can connect and disconnect the pilot-operated safety valve by controlling the rotation of multiple snap-fit ​​components when performing performance testing. The operation is relatively simple, which can significantly shorten the preparation time before testing and the disassembly time after testing, and the testing efficiency is high. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pilot-operated safety valve according to an embodiment of the present invention.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of a pilot-operated safety valve testing device according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the planar structure of a pilot-operated safety valve testing device according to an embodiment of the present invention.

[0020] Figure 4 This is a partial cross-sectional view of a pilot-operated safety valve testing device according to an embodiment of the present invention.

[0021] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0022] Figure label: 100. Testing equipment; 1. Support base; 2. Detector assembly; 21. Detector; 22. Detection pipe; 221. First pipe section; 222. Second pipe section; 223. Third pipe section; 224. Fourth pipe section; 3. Cylinder base; 31. Cylinder cavity; 32. Cylinder opening; 33. Through groove; 34. Relief groove; 4. Snap-fit ​​assembly; 41. Snap-fit ​​part; 411. First section; 4111. Hinge part; 412. Second section; 4121. Snap-fit ​​part; 4122. Snap-fit ​​surface; 413. Second inclined surface; 44. Anti-slip pad; 5. Stop assembly; 51. Stop component; 511. Through hole; 5111. Connecting port; 512. Stop surface; 513. Sliding post; 514. Stop plate; 515. Sleeve; 52. Sealing ring; 6. Control components; 61. Propulsion ring; 611. First inclined plane; 62. Control ring; 63. Fixing ring; 64. Connecting frame; 201. Main valve body; 202. Connecting flange; 2021. Sealing surface; 203. Connection port. Detailed Implementation

[0023] 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.

[0024] It is known that, such as Figure 1 As shown, the pilot-operated safety valve includes a main valve body 201, an inlet flange, and an outlet flange. The axes of the inlet flange and the outlet flange are perpendicular to each other. The inlet flange has a medium inlet, and the outlet flange has a medium outlet. The pilot-operated safety valve is connected to the system pipeline through the inlet flange and the outlet flange, so that the system medium enters through the medium inlet and exits through the medium outlet. Both the medium inlet and the medium outlet are connection ports 203, and both the inlet flange and the outlet flange are connection flanges 202.

[0025] like Figures 2 to 5 As shown, the pilot-operated safety valve testing device 100 of this embodiment includes a support base 1, a detector assembly 2, a cylinder base 3, and a snap-fit ​​assembly 4. The detector assembly 2 includes a detector 21 and a detection pipe 22. The detector 21 is connected to the detection pipe 22, and the detection pipe 22 has a detection port for connecting to the connection port 203. The cylinder base 3 is connected to the support base 1. The cylinder base 3 has a cylinder cavity 31 and a cylinder opening 32. The detection port is located in the cylinder cavity 31 and faces the cylinder opening 32. The snap-fit ​​assembly 4 includes a plurality of snap-fit ​​members 41. The snap-fit ​​members 41 are located on the outside of the cylinder base 3 and are arranged at intervals along the circumference of the cylinder base 3. The snap-fit ​​members 41 include a hinge portion 4111 and a snap-fit ​​portion 4121. The hinge portion 4111 is rotatably connected to the cylinder base 3, and the snap-fit ​​portion 4121 is used to snap-fit ​​the connection flange 202 of the pilot-operated safety valve.

[0026] In this embodiment of the invention, the pilot-operated safety valve testing device 100, when testing a pilot-operated safety valve, first places the pilot-operated safety valve in an appropriate position, such that the connecting flange 202 of the pilot-operated safety valve is located between multiple snap-fit ​​parts 41. The multiple snap-fit ​​parts 41 are rotated, causing the snap-fit ​​portion 4121 to move towards the center line of the cylinder seat 3, thereby engaging the pilot-operated safety valve. Simultaneously, the detection port of the detection pipeline 22 is connected to the connection port 203 of the pilot-operated safety valve, thus connecting the testing device 100 to the pilot-operated safety valve. Then, a test medium is introduced into the detection pipeline 22, and the detector 21 detects the real-time pressure value within the detection pipeline 22. This allows for the acquisition of a real-time pressure value change curve, a comparison result between the real-time pressure value and a preset pressure value, etc., thereby determining whether the pilot-operated safety valve's sealing performance, pressure response performance, etc., are qualified.

[0027] The pilot-operated safety valve testing device 100 of this invention can connect and disconnect the pilot-operated safety valve by controlling the rotation of multiple snap-fit ​​parts 41 when performing performance testing on the pilot-operated safety valve. The operation is relatively simple, which can greatly shorten the preparation time before the test and the disassembly time after the test, and the testing efficiency is high.

[0028] Optionally, the test medium can be compressed air, nitrogen, or a fluid that matches the actual operating conditions of the pilot-operated safety valve under test. Those skilled in the art can select the appropriate medium based on the design requirements of the pilot-operated safety valve, which will not be elaborated here.

[0029] Optionally, the detector assembly 2 also includes an alarm device, which includes an audible and visual alarm and a buzzer. Both the audible and visual alarm and the buzzer are integrated into the detector 21. When the detector 21 fails to meet the performance test results of the pilot-operated safety valve, an alarm can be issued through the audible and visual alarm and the buzzer.

[0030] In some embodiments, the sleeve seat 3 and the snap-fit ​​assembly 4 constitute a connection structure, and there are multiple connection structures, with at least two connection structures used to connect the inlet flange and the outlet flange respectively.

[0031] It is known that if only one connection structure is set, when performing performance tests on a pilot-operated safety valve, the connection structure is connected to one of the inlet flange and the outlet flange. The other of the inlet flange and the outlet flange needs to be sealed by a sealing structure to ensure its sealing performance, which is quite troublesome to operate.

[0032] With the above settings, when performing performance tests on pilot-operated safety valves, both the medium inlet and outlet of the pilot-operated safety valve can be blocked simultaneously. The operation is relatively simple, which can further shorten the preparation time before the test and the disassembly time after the test, resulting in high testing efficiency.

[0033] Specifically, such as Figure 1 and Figure 2 As shown, the support base 1 is L-shaped to form two mutually perpendicular support parts. There are two connecting structures, which are installed on the two support parts respectively. The center lines of the cylinder base 3 of the two connecting structures are perpendicular to each other so as to connect the inlet flange and the outlet flange.

[0034] The cylinder seat 3 is cylindrical, and the internal space of the cylinder seat 3 forms a circular cavity 31. The center line of the cylinder seat 3 is perpendicular to the support part connected to it. One end of the cylinder seat 3 is fixedly connected to the support seat 1, and the other end of the cylinder seat 3 is open to form the aforementioned opening 32. The cylinder seat 3 has a plurality of mounting slots for mounting the snap-fit ​​parts 41 at the end near the opening 32. The mounting slots correspond one-to-one with the snap-fit ​​parts 41. There are three snap-fit ​​parts 41. The three snap-fit ​​parts 41 are evenly distributed along the circumference of the cylinder seat 3, which can improve the stability of the snap-fit ​​assembly 4 in snapping the pilot-operated safety valve.

[0035] The testing pipeline 22 includes a first pipe section 221, a second pipe section 222, and a third pipe section 223. The first pipe section 221, the second pipe section 222, and the third pipe section 223 are interconnected by a tee connector. The first pipe section 221 is used to connect to the test medium source. The ends of the second pipe section 222 and the third pipe section 223 that are far apart from each other form the aforementioned test ports. The test ports of the second pipe section 222 and the third pipe section 223 are used to connect the medium inlet and the medium outlet of the pilot-operated safety valve, respectively. The test medium can be injected into the second pipe section 222 and the third pipe section 223 through the first pipe section 221. The test medium enters the medium inlet and the medium outlet through the two test ports, respectively, and then enters the pilot-operated safety valve for performance testing of the pilot-operated safety valve.

[0036] In some embodiments, the testing device 100 further includes a stop assembly 5, which includes a stop member 51. The stop member 51 is slidably connected to the cylinder seat 3 along the axial direction of the cylinder seat 3 and is disposed at the cylinder opening 32. The stop member 51 has a through hole 511 and a stop surface 512. One end of the through hole 511 is connected to the detection port, and the other end of the through hole 511 forms a communication port 5111 for communicating with the connection port 203. The communication port 5111 is formed on the stop surface 512, and the stop surface 512 is used to stop the sealing surface 2021 of the connecting flange 202.

[0037] like Figure 1 As shown, the side of the connecting flange 202 facing away from the main valve body 201 is its sealing surface 2021, and the side of the connecting flange 202 close to the main valve body 201 is its back side.

[0038] When assembling the pilot-operated safety valve and the testing device 100, the pilot-operated safety valve is placed in an appropriate position, and the connecting flange 202 is located within multiple snap-fit ​​parts 41. The connecting flange 202 is snapped in place by the multiple snap-fit ​​parts 41. At the same time, the stop part 51 is controlled to slide towards the pilot-operated safety valve until the stop surface 512 abuts against the sealing surface 2021 of the connecting flange 202, so that the connecting pipe is connected to the connection port 203 of the pilot-operated safety valve through the through hole 511. Thus, the test assembly of the pilot-operated safety valve can be realized.

[0039] Specifically, such as Figure 4 and Figure 5 As shown, taking the connection structure connected to the outlet flange as an example, the specific structure of the connection structure is described in detail. The stop member 51 includes a sliding column 513 and a stop plate 514. The sliding column 513 is located at the cylinder opening 32 and is slidably engaged with the cylinder seat 3. The stop plate 514 is located outside the cylinder cavity 31 and is fixedly connected to the sliding column 513, thereby improving the stability of the stop member 51 sliding relative to the cylinder seat 3.

[0040] The through hole 511 is located at the center of the stop member 51 and extends through the axial direction of the stop member 51, that is, the through hole 511 passes through the sliding column 513 and the stop plate 514. The end face of the sliding column 513 away from the stop plate 514 is fixedly connected to the sleeve 515. The detection pipe 22 also includes a fourth pipe section 224. The center line of the fourth pipe section 224 coincides with the center line of the cylinder seat 3. One end of the fourth pipe section 224 is connected to the third pipe section 223. The other end of the fourth pipe section 224 passes through the sleeve 515 and can slide relative to the sleeve 515. Thus, the through hole 511 and the detection pipe 22 can be kept connected when the stop member 51 slides relative to the cylinder seat 3.

[0041] In addition, the side wall of the cylinder seat 3 has a through groove 33 through which the third pipe section 223 passes to connect with the fourth pipe section 224.

[0042] Optionally, a sealing structure is provided between the fourth pipe section 224 and the sleeve 515 to ensure the sealing of the connection between the two.

[0043] In some embodiments, such as Figure 5 As shown, the stop assembly 5 also includes a sealing ring 52, which is arranged circumferentially along the communication port 5111. The sealing ring 52 is located on the stop surface 512 and connected to the stop member 51.

[0044] Optionally, the sealing ring 52 is made of rubber.

[0045] By setting a sealing ring 52, the sealing performance at the stop point between the stop face 512 and the connecting flange 202 of the pilot-operated safety valve can be improved, thereby improving the sealing performance between the through hole 511 and the connecting port 203 of the pilot-operated safety valve, and thus improving the accuracy of the test results.

[0046] In some embodiments, the snap-fit ​​member 41 includes a first segment 411 and a second segment 412 arranged intersecting each other. The extension direction of the first segment 411 is consistent with the axial direction of the cylinder seat 3. The second segment 412 extends from the first segment 411 toward the cylinder seat 3. The portion of the first segment 411 away from the second segment 412 forms a hinge portion 4111, and the portion of the second segment 412 away from the first segment 411 forms a snap-fit ​​portion 4121. The snap-fit ​​portion 4121 has a snap-fit ​​surface 4122 arranged toward the cylinder opening 32. The snap-fit ​​surface 4122 is used to fit against the back of the connecting flange 202.

[0047] During the assembly of the pilot-operated safety valve, the pilot-operated safety valve is placed in an appropriate position, with the connecting flange 202 positioned between multiple snap-fit ​​parts 41. The snap-fit ​​part 4121 is located on the back of the connecting flange 202. By controlling the snap-fit ​​parts 4121 of the multiple snap-fit ​​parts 41 to rotate inward simultaneously, the snap-fit ​​surfaces 4122 of the multiple snap-fit ​​parts 4121 can simultaneously adhere to the back of the connecting flange 202, thereby achieving snap-fit ​​of the pilot-operated safety valve and fixing its position. At the same time, the test pipeline 22 is connected to the connection port 203 of the pilot-operated safety valve through the through hole 511 of the stop part 51, thus completing the pre-test preparation work for the pilot-operated safety valve.

[0048] Specifically, such as Figure 4 and Figure 5 As shown, the first segment 411 and the second segment 412 of the snap-fit ​​member 41 are perpendicular to each other. The portion of the first segment 411 away from the second segment 412 forms the aforementioned hinge portion 4111. The hinge portion 4111 is hinged to the outer wall of the cylinder seat 3 via a pivot. The portion of the second segment 412 away from the first segment 411 forms the aforementioned snap-fit ​​portion 4121. The side of the snap-fit ​​portion 4121 facing the cylinder seat 3 is the snap-fit ​​surface 4122. The first segments 411 of the three snap-fit ​​members 41 simultaneously adhere to the outer side of the connecting flange 202, and the snap-fit ​​portions 4121 of the three snap-fit ​​members 41 simultaneously adhere to the back of the connecting flange 202, thereby ensuring the stability of the pilot-operated safety valve.

[0049] In some embodiments, such as Figure 5 As shown, the snap-fit ​​assembly 4 also includes an anti-slip pad 44, which is in contact with the snap-fit ​​surface 4122 and connected to the snap-fit ​​portion 4121.

[0050] The anti-slip pad 44 increases the friction between the snap-fit ​​surface 4122 and the connecting flange 202, thereby increasing the stability of the pilot-operated safety valve and preventing relative sliding between the pilot-operated safety valve and the testing device 100 during the test, thus ensuring the accuracy of the test results.

[0051] Optionally, the anti-slip mat 44 is made of rubber.

[0052] In some embodiments, the testing device 100 further includes a control component 6, which includes a push ring 61 slidably fitted onto the cylinder seat 3. The push ring 61 has a first inclined surface 611, and the locking member 41 has a second inclined surface 413. The second inclined surface 413 is located on the side of the hinge portion 4111 near the locking portion 4121. The first inclined surface 611 and the second inclined surface 413 have the same inclination direction. The second inclined surface 413 gradually moves away from the center line of the cylinder seat 3 from the hinge portion 4111 to the locking portion 4121 in the axial direction of the cylinder seat 3. When the push ring 61 slides toward the locking member 41, the first inclined surface 611 can fit against the second inclined surface 413 so that the locking portion 4121 rotates toward the cylinder seat 3.

[0053] The push ring 61 can simultaneously control the rotation of multiple snap-fit ​​parts 41, thereby controlling the snap-fit ​​parts 4121 of multiple snap-fit ​​parts 41 to simultaneously snap onto the connecting flange 202 of the pilot-operated safety valve. The operation is relatively simple, which can further shorten the preparation time before the test and the disassembly time after the test, and improve the test efficiency.

[0054] In some embodiments, the control assembly 6 further includes a control ring 62 and a fixed ring 63. The fixed ring 63 is fitted onto the cylinder base 3, and the control ring 62 is fitted onto the fixed ring 63. The control ring 62 and the fixed ring 63 are threaded together. The control ring 62 is rotatably connected to the propulsion ring 61.

[0055] Twisting the control ring 62 causes it to move axially through the threaded engagement between the control ring 62 and the fixed ring 63, which in turn drives the propulsion ring 61 to move along the cylinder seat 3. The propulsion ring 61 drives multiple locking parts 41 to rotate simultaneously, thereby achieving the locking of the pilot-operated safety valve.

[0056] Specifically, such as Figure 4 and Figure 5 As shown, the inner wall of the push ring 61 is conical, forming the first inclined surface 611. The second inclined surface 413 is located on the side of the snap-fit ​​member 41 near the first inclined surface 611. The inclination direction and inclination angle of the first inclined surface 611 and the second inclined surface 413 are the same. The push ring 61 is located axially between the control ring 62 and the snap-fit ​​member 41 on the cylinder seat 3. The end face of the push ring 61 near the control ring 62 is rotatably connected to the control ring 62. The control ring 62 drives the push ring 61 to move towards the snap-fit ​​member 41. The first inclined surface 611 of the push ring 61 fits against the second inclined surface 413 of the snap-fit ​​member 41, thereby driving the snap-fit ​​member 41 to rotate, causing multiple snap-fit ​​parts 4121 to rotate inward, thus achieving snap-fit ​​of the pilot-operated safety valve.

[0057] In some embodiments, the control assembly 6 further includes a connecting frame 64, the cylinder seat 3 has a relief groove 34, the connecting frame 64 passes through the relief groove 34, the control ring 62 is connected to one end of the connecting frame 64 and is rotatable relative to the connecting frame 64, and the other end of the connecting frame 64 is connected to the stop member 51.

[0058] Therefore, the control ring 62 can simultaneously drive the push ring 61 and the stop member 51 to move. When installing the pilot-operated safety valve on the test device 100, first place the pilot-operated safety valve in an appropriate position, and then turn the control ring 62 to move it closer to the snap-fit ​​member 41. This simultaneously achieves the snap-fit ​​of the pilot-operated safety valve and the connection between the test pipeline 22 and the connection port 203, completing the pre-test preparation work. The operation is relatively simple. Similarly, when disassembling the pilot-operated safety valve, simply turn the control ring 62 to move it away from the snap-fit ​​member 41. The operation is also relatively simple, which can significantly shorten the pre-test preparation time and the post-test disassembly time, thereby improving test efficiency.

[0059] Specifically, such as Figure 4 and Figure 5 As shown, the dimensions of the clearance groove 34 in the circumferential direction of the cylinder seat 3 match the dimensions of the connecting frame 64 in the circumferential direction of the cylinder seat 3. The clearance groove 34 can limit the connecting frame 64, thereby restricting the stop member 51 to slide only along the axial direction of the cylinder seat 3. There are multiple connecting frames 64, which are evenly distributed along the circumferential direction of the cylinder seat 3. The push ring 61 and the stop member 51 are connected through multiple connecting frames 64, which can improve the stability of the connection between the stop member 51 and the push ring 61, thereby ensuring the stability of the sliding of the stop ring.

[0060] In some embodiments, the control ring 62 is rotatably connected to the propulsion ring 61 via a bearing.

[0061] In some embodiments, the control ring 62 is rotatably connected to the connecting frame 64 via a bearing.

[0062] This improves the smoothness of the rotation of the control ring 62 relative to the propulsion ring 61 and the connecting parts, making it more convenient for disassembly and assembly operations during the testing of the pilot-operated safety valve.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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 pilot-operated safety valve testing device (100), characterized in that, Suitable for testing pilot-operated safety valves, the pilot-operated safety valves including a connecting flange (202) and a connection port (203), the testing device (100) includes Support base (1); The detector assembly (2) includes a detector (21) and a detection conduit (22), the detector (21) being connected to the detection conduit (22), the detection conduit (22) having a detection port for communicating with the connection port (203); A cylindrical base (3) is connected to the support base (1). The cylindrical base (3) has a cylindrical cavity (31) and a cylindrical opening (32). The detection port is located in the cylindrical cavity (31) and is arranged facing the cylindrical opening (32). The snap-fit ​​assembly (4) includes a plurality of snap-fit ​​members (41), which are located on the outside of the cylinder seat (3). The plurality of snap-fit ​​members (41) are arranged at intervals along the circumference of the cylinder seat (3). Each snap-fit ​​member (41) includes a hinge portion (4111) and a snap-fit ​​portion (4121). The hinge portion (4111) is rotatably connected to the cylinder seat (3), and the snap-fit ​​portion (4121) is used to snap onto the connecting flange (202) of the pilot-operated safety valve.

2. The pilot-operated safety valve testing device (100) according to claim 1, characterized in that, The testing device (100) further includes a stop assembly (5), which includes a stop member (51) that is slidably connected to the cylinder seat (3) along the axial direction of the cylinder seat (3) and is located at the cylinder opening (32). The stop member (51) has a through hole (511) and a stop surface (512). One end of the through hole (511) is connected to the detection port, and the other end of the through hole (511) forms a connecting port (5111) for connecting the connection port (203). The connecting port (5111) is formed on the stop surface (512), and the stop surface (512) is used to stop the sealing surface (2021) of the connecting flange (202).

3. The pilot-operated safety valve testing device (100) according to claim 2, characterized in that, The stop assembly (5) further includes a sealing ring (52), which is arranged circumferentially along the communication port (5111), and is located on the stop surface (512) and connected to the stop member (51).

4. The pilot-operated safety valve testing device (100) according to claim 1, characterized in that, The snap-fit ​​member (41) includes a first segment (411) and a second segment (412) arranged intersecting each other. The extension direction of the first segment (411) is consistent with the axial direction of the cylinder seat (3). The second segment (412) extends from the first segment (411) toward the cylinder seat (3). The portion of the first segment (411) away from the second segment (412) forms the hinge portion (4111). The portion of the second segment (412) away from the first segment (411) forms the snap-fit ​​portion (4121). The snap-fit ​​portion (4121) has a snap-fit ​​surface (4122) arranged toward the cylinder opening (32). The snap-fit ​​surface (4122) is used to fit against the back of the connecting flange (202).

5. The pilot-operated safety valve testing device (100) according to claim 4, characterized in that, The snap-fit ​​assembly (4) also includes an anti-slip pad (44), which is in contact with the snap-fit ​​surface (4122) and connected to the snap-fit ​​portion (4121).

6. The pilot-operated safety valve testing device (100) according to claim 2, characterized in that, The test device (100) also includes a control component (6), which includes a propulsion ring (61) that is slidably fitted onto the cylinder base (3). The propulsion ring (61) has a first inclined surface (611), and the snap-fit ​​member (41) has a second inclined surface (413). The second inclined surface (413) is located on the side of the hinge (4111) close to the snap-fit ​​member (4121). The first inclined surface (611) and the second inclined surface (413) have the same inclination direction. The second inclined surface (413) gradually moves away from the center line of the cylinder seat (3) from the hinge (4111) to the snap-fit ​​member (4121) in the axial direction of the cylinder seat (3). When the propulsion ring (61) slides toward the snap-fit ​​member (41), the first inclined surface (611) can fit against the second inclined surface (413) so that the snap-fit ​​member (4121) rotates toward the cylinder seat (3).

7. The pilot-operated safety valve testing device (100) according to claim 6, characterized in that, The control component (6) further includes a control ring (62) and a fixing ring (63). The fixing ring (63) is fitted onto the cylinder seat (3), and the control ring (62) is fitted onto the fixing ring (63). The control ring (62) and the fixing ring (63) are threaded together. The control ring (62) is rotatably connected to the propulsion ring (61).

8. The pilot-operated safety valve testing device (100) according to claim 7, characterized in that, The control assembly (6) further includes a connecting frame (64), the cylinder seat (3) has a relief groove (34), the connecting frame (64) passes through the relief groove (34), the control ring (62) is connected to one end of the connecting frame (64) and is rotatable relative to the connecting frame (64), and the other end of the connecting frame (64) is connected to the stop member (51).

9. The pilot-operated safety valve testing device (100) according to claim 8, characterized in that, The control ring (62) is rotatably connected to the propulsion ring (61) via a bearing; and / or, The control ring (62) is rotatably connected to the connecting frame (64) via a bearing.

10. The pilot-operated safety valve testing device (100) according to any one of claims 1-9, characterized in that, The pilot-operated safety valve has a connecting flange (202) including an inlet flange and an outlet flange. The cylinder seat (3) and the snap-fit ​​assembly (4) constitute a connecting structure. There are multiple connecting structures, and at least two of the connecting structures are used to connect the inlet flange and the outlet flange, respectively.

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