An automated safety valve calibration device

Abstract

The present invention discloses an automated safety valve calibration device, belonging to the technical field of safety valve detection. An automated safety valve calibration device includes a support with a hollow interior, and further includes: a tank body disposed on the support, wherein a communication pipe is fixedly connected to the top of the tank body, a valve is fixedly installed on the communication pipe, a ring platform is fixedly connected to the top of the communication pipe, and a clamp is provided on the ring platform; a pump body fixedly installed on the tank body, wherein the output end of the pump body extends into the tank body, and a driving part for driving the tank body to reciprocally rotate is provided on the support; The present invention can perform detection and calibration on the safety valve in a dynamic environment, improving the calibration and detection accuracy of the safety valve.

Description

Technical Field

[0001] The present invention relates to the technical field of safety valve detection, and particularly relates to an automated safety valve calibration device. Background Art

[0002] A safety valve is an automatic valve used to protect a closed system from overpressure damage. When the pressure in the system exceeds a predetermined safety limit, the safety valve opens to release the excess pressure, thus preventing potential dangerous situations. Once the pressure drops back within the safe range, the safety valve automatically closes and stops the discharge of the medium (such as gas or liquid). During the production and use of safety valves, it is necessary to calibrate the safety valves to ensure that they can relieve pressure normally.

[0003] In the prior art, when calibrating a safety valve, it mainly makes the safety valve bear a pressure value higher than the preset value, observes whether it can discharge the excess pressure in time, and whether it can automatically close when the pressure reaches below the preset value. In practice, the working environment of the safety valve is relatively complex and may be affected by vibration or shaking. However, the existing calibration devices can only perform calibration work and it is difficult to accurately calibrate whether the safety valve can be stably used in a complex working environment. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, the functions of the safety valve calibration device are relatively single and it is difficult to accurately calibrate whether the safety valve can be stably used in a complex working environment, and to propose an automated safety valve calibration device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An automated safety valve calibration device includes a support with a hollow interior, and further includes: a tank body disposed on the support. Among them, a communication pipe is fixedly connected to the top of the tank body, a valve is fixedly installed on the communication pipe, a ring platform is fixedly connected to the top of the communication pipe, and a clamp is provided on the ring platform; a pump body fixedly installed on the tank body, wherein the output end of the pump body extends into the tank body, and a driving part for driving the tank body to rotate reciprocally is provided on the support.

[0007] In order to facilitate driving the safety valve to rotate reciprocally, preferably, the driving part includes a driving motor fixedly installed on the inner bottom of the support, a reciprocating lead screw is fixedly installed on the output shaft of the driving motor, a reciprocating slider slidably connected to the inner wall of the support is installed on the outer wall of the reciprocating lead screw. Among them, a circular hole is provided on the support, the tank body is sleeved in the circular hole, a vertical shaft is fixedly connected to the bottom of the tank body, a driven gear is fixedly installed on the outer wall of the vertical shaft, and a rack meshing with the driven gear is fixedly connected to the reciprocating slider.

[0008] In order to facilitate the up-and-down jitter of the safety valve when it rotates, preferably, a lower annular plate is fixedly connected to the inner wall of the support, a plurality of bumps distributed circumferentially are fixedly connected to the lower annular plate, and a roller pressing on the lower annular plate is rotatably installed at the lower end of the tank body.

[0009] In order to enable the tank body to reset downward more quickly, further, an upper annular plate is fixedly connected to the outer wall of the tank body, an elastic member is fixedly installed at the inner top of the support, and the telescopic end of the elastic member abuts against the top of the upper annular plate.

[0010] In order to facilitate the fixing of the safety valve, furthermore, the fixture includes a plurality of brackets fixedly connected to the annular platform, a pressing rod is rotatably installed on each of the plurality of brackets through a rotating rod, and a swinging portion for driving the pressing rod to swing is provided on the annular platform.

[0011] In order to facilitate the start of the inclined swing of the pressing rod, furthermore, the swinging portion includes a device hole provided on the annular platform, a piston is slidably installed in the device hole, a pull rod is fixedly connected to the piston, and the top of the pull rod is connected to one end of the pressing rod through a pull rope.

[0012] In order to automatically realize the swinging work of the pressing rod, furthermore, the elastic member is an elastic airbag, an air suction pipe and an exhaust pipe communicated with the elastic member are fixedly connected to the elastic member, the end of the exhaust pipe extends into the device hole, an overflow pipe extending to the outer wall of the annular platform is provided in the device hole, and an overflow valve is fixedly installed in the overflow pipe.

[0013] In order to facilitate the positioning and sealing of the safety valve, preferably, a plurality of circumferentially distributed positioning rods are fixedly connected to the upper end of the annular platform, and a sealing ring is fixedly installed at the upper port of the communicating pipe.

[0014] In order to facilitate the heat dissipation of the driving motor and the pump body, furthermore, an air inlet is provided on the outer wall of the support, a filter element is fixedly installed in the air inlet, and the end of the air suction pipe is located in the cavity of the support.

[0015] In order to more conveniently fix the safety valve, furthermore, a telescopic device is fixedly installed at the bottom of the annular platform, and the telescopic end of the telescopic device extends into the device hole.

[0016] Compared with the prior art, the present invention provides an automatic safety valve calibration device, which has the following beneficial effects:

[0017] 1. The automatic safety valve calibration device drives the reciprocating lead screw to rotate through a driving motor. The rack will drive the driven gear to rotate reciprocally, and the driven gear will drive the tank to rotate reciprocally through a vertical shaft. The tank will drive the safety valve at the top to rotate reciprocally, so that the safety valve can be tested and calibrated in a dynamic environment, improving the calibration and detection accuracy of the safety valve.

[0018] 2. The automatic safety valve calibration device drives the rollers at the bottom to roll reciprocally on the lower annular plate through the tank. Thus, the reciprocally rotating tank will not only drive the safety valve to rotate reciprocally, but also drive the safety valve to vibrate up and down, making the calibration environment of the safety valve more complex and closer to the actual situation, and further improving the accuracy of calibrating the safety valve.

[0019] 3. When the elastic member of the automatic safety valve calibration device is squeezed, the air pressure in the device hole will increase, which will cause the piston to move upward and drive the pull rod to move upward. The pull rod will pull one end of the pressure rod through a pull rope, and the other end of the pressure rod will press downward on the flange of the safety valve, thus automatically completing the fixing work of the safety valve, making the operation more convenient.

[0020] 4. The automatic safety valve calibration device sucks air into the cavity of the support through an air suction pipe. The cavity of the support will suck air through the air inlet, and the filter element in the air inlet will filter the dust in the air. When the air passes through the cavity in the support, it can also take away part of the temperature on the pump body and the driving motor, thus completing the heat dissipation work and improving the working stability of the whole device.

[0021] 6. The automatic safety valve calibration device drives the upper annular plate to press the elastic member through the tank. When the tank returns downward, the elastic force of the elastic member will make the tank move downward and reset more efficiently. Description of the Drawings

[0022] Figure 1 is a first perspective axonometric structural schematic diagram of an automatic safety valve calibration device proposed by the present invention;

[0023] Figure 2 is a second perspective axonometric structural schematic diagram of an automatic safety valve calibration device proposed by the present invention;

[0024] Figure 3 is a sectional axonometric structural schematic diagram of an automatic safety valve calibration device proposed by the present invention;

[0025] Figure 4 is a tank axonometric structural schematic diagram of an automatic safety valve calibration device proposed by the present invention;

[0026] Figure 5Schematic axonometric view of the support of an automated safety valve calibration device proposed by the present invention;

[0027] Figure 6 Schematic axonometric view of the partially sectioned structure of an automated safety valve calibration device proposed by the present invention;

[0028] Figure 7 Schematic axonometric view of the vertical shaft of an automated safety valve calibration device proposed by the present invention;

[0029] Figure 8 Schematic axonometric view of the pressure rod of an automated safety valve calibration device proposed by the present invention.

[0030] In the figure: 1, support; 2, tank body; 3, through pipe; 4, annular platform; 5, pump body; 6, positioning rod; 7, round hole; 8, vertical shaft; 9, driven gear; 10, rack; 11, reciprocating lead screw; 12, driving motor; 13, reciprocating slider; 14, bracket; 15, rotating rod; 16, pressure rod; 17, pressure gauge; 18, device hole; 19, piston; 20, pull rod; 21, pull rope; 22, roller; 23, lower annular plate; 24, convex block; 25, upper annular plate; 26, elastic member; 27, exhaust pipe; 28, suction pipe; 29, overflow pipe; 30, filter element; 31, air inlet; 32, valve; 33, telescopic device. Detailed implementation method

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] Embodiment 1:

[0034] Refer to Figures 1 - 8, an automated safety valve calibration device, including a support 1 with a hollow interior, and the appearance of the support 1 is approximately cylindrical, further including: a cylindrical tank body 2, arranged on the support 1, and a pressure gauge 17 for viewing the pressure value is installed on the tank body 2. Among them, a connecting pipe 3 is fixedly connected to the top of the tank body 2, a valve 32 is fixedly installed on the connecting pipe 3, a circular platform 4 is fixedly connected to the top of the connecting pipe 3, and a fixture for fixing the safety valve is provided on the circular platform 4. Multiple circumferentially distributed positioning rods 6 are fixedly connected to the upper end of the circular platform 4, and the number of the positioning rods 6 corresponds to the flange holes on the safety valve, which is 6. A sealing ring for enhancing the sealing between the two is fixedly installed at the upper port of the connecting pipe 3; a pump body 5 fixedly installed on the tank body 2, and the pump body 5 is used to convey air into the tank body 2. Among them, the output end of the pump body 5 extends into the tank body 2, and a driving part for driving the tank body 2 to rotate reciprocally is provided on the support 1.

[0035] Specifically, during use, fix the port of the safety valve on the upper port of the connecting pipe 3, then open the pump body 5 and the valve 32. The pump body 5 will convey air into the tank body 2 to achieve pressure increase. The air in the tank body 2 will enter the safety valve through the connecting pipe 3. During this period, observe the safety valve. When the pressure value reaches the same as the preset value of the safety valve, check whether the safety valve starts to relieve pressure. If it does not start to relieve pressure or relieves pressure when the pressure does not reach the preset value, it is judged that the safety valve is unqualified. Then close the pump body 5. When the pressure in the tank body 2 gradually drains to the preset value, observe the safety valve. If it is still relieving pressure, it is judged as unqualified.

[0036] Embodiment 2:

[0037] Refer to Figure 3 、 Figure 4 And Figure 7 , which is basically the same as Embodiment 1. Furthermore, the specific implementation scheme of the driving part is specifically disclosed.

[0038] The above-mentioned driving part includes a driving motor 12 fixedly installed at the inner bottom of the support 1. The output shaft of the driving motor 12 is fixedly installed with a reciprocating lead screw 11. A reciprocating slider 13 slidingly connected to the inner wall of the support 1 is installed on the outer wall of the reciprocating lead screw 11. Among them, a circular hole 7 is provided on the support 1, the tank body 2 is sleeved in the circular hole 7, a vertical shaft 8 is fixedly connected to the bottom of the tank body 2, a driven gear 9 is fixedly installed on the outer wall of the vertical shaft 8, and a rack 10 meshing with the driven gear 9 is fixedly connected to the reciprocating slider 13.

[0039] Specifically, during use, fix the port of the safety valve on the upper port of the through pipe 3, then open the pump body 5 and the valve 32. The pump body 5 will transport air into the tank body 2 to achieve pressure increase. The air in the tank body 2 will enter the safety valve through the through pipe 3. During this period, observe the safety valve. When the pressure value reaches the same as the preset value of the safety valve, check whether the safety valve starts to relieve pressure. If it does not start to relieve pressure or relieves pressure when the pressure does not reach the preset value, it is determined that the safety valve is unqualified. Then close the pump body 5. When the pressure in the tank body 2 gradually drains to the preset value, observe the safety valve. If it is still relieving pressure, it is determined to be unqualified; during the calibration period, turn on the drive motor 12. The drive motor 12 will drive the reciprocating lead screw 11 to rotate, and the reciprocating lead screw 11 will drive the reciprocating slider 13 to reciprocate in the support 1 and drive the rack 10 to reciprocate. The rack 10 will drive the driven gear 9 to rotate reciprocally, and the driven gear 9 will drive the tank body 2 to rotate reciprocally through the vertical shaft 8. The tank body 2 will drive the safety valve at the top to rotate reciprocally, so that the safety valve is tested and calibrated in a dynamic environment, improving the calibration and detection accuracy of the safety valve.

[0040] Embodiment 3:

[0041] Refer to Figures 3 - 5 , which is basically the same as Embodiment 2. Further, a specific implementation scheme for making the safety valve shake up and down is specifically added.

[0042] The inner wall of the above-mentioned support 1 is fixedly connected with a lower annular plate 23. A plurality of bumps 24 distributed in a circumferential manner are fixedly connected to the lower annular plate 23. The number of bumps 24 is 3 to 6. The preferred number in this application is 3. The lower end of the tank body 2 is rotatably installed with a roller 22 pressing on the lower annular plate 23; an upper annular plate 25 is fixedly connected to the outer wall of the tank body 2. An elastic member 26 is fixedly installed at the inner top of the support 1. The telescopic end of the elastic member 26 abuts against the top of the upper annular plate 25.

[0043] Specifically, during use, the port of the safety valve is fixed on the upper port of the through pipe 3, and then the pump body 5 and the valve 32 are opened. The pump body 5 will deliver air into the tank body 2 to achieve pressure increase. The air in the tank body 2 will enter the safety valve through the through pipe 3. During this period, observe the safety valve. When the pressure value reaches the same as the preset value of the safety valve, check whether the safety valve starts to relieve pressure. If it does not start to relieve pressure or relieves pressure when the pressure does not reach the preset value, it is determined that the safety valve is unqualified. Then close the pump body 5. When the pressure in the tank body 2 gradually drains to the preset value, observe the safety valve. If it is still relieving pressure, it is judged as unqualified. When the tank body 2 rotates reciprocally, the tank body 2 will also drive the rollers 22 at the bottom to roll reciprocally on the lower annular plate 23. When the roller 22 passes over the bump 24, the bump 24 will push the roller 22 upward, and the roller 22 will drive the tank body 2 and the safety valve at the top upward. When the roller 22 passes over the bump 24, the tank body 2 will drive the safety valve at the top to slide downward and reset. Therefore, the reciprocally rotating tank body 2 will not only drive the safety valve to rotate reciprocally, but also drive the safety valve to vibrate up and down, making the calibration environment of the safety valve more complex and closer to the actual situation, and further improving the accuracy of calibrating the safety valve.

[0044] Embodiment 4:

[0045] Referring to Figures 3 - 6 and Figure 8 , which is basically the same as Embodiment 3. Furthermore, the specific implementation scheme of the fixture is specifically disclosed.

[0046] The fixture includes a plurality of brackets 14 fixedly connected to the annular platform 4. The number of brackets 14 is 4 - 8, and the preferred number in this application is 6. A pressure lever 16 is rotatably installed on each of the plurality of brackets 14 through a rotating rod 15. A swinging part for driving the pressure lever 16 to swing is provided on the annular platform 4. The swinging part includes a device hole 18 provided on the annular platform 4. A piston 19 is slidably installed in the device hole 18. A pull rod 20 is fixedly connected to the piston 19. The top of the pull rod 20 is connected to one end of the pressure lever 16 through a pull rope 21; the elastic member 26 is an elastic airbag. An air suction pipe 28 and an exhaust pipe 27 communicated with it are fixedly connected to the elastic member 26. One-way valves are fixedly installed in both the air suction pipe 28 and the exhaust pipe 27. The end of the exhaust pipe 27 extends into the device hole 18. An overflow pipe 29 extending to the outer wall of the annular platform 4 is provided in the device hole 18. An overflow valve is fixedly installed in the overflow pipe 29, and the overflow valve has a manual opening function.

[0047] Specifically, during use, the port of the safety valve is fixed on the upper port of the through pipe 3, and then the pump body 5 and the valve 32 are opened. The pump body 5 will transport air into the tank body 2 to achieve pressure increase. The air in the tank body 2 will enter the safety valve through the through pipe 3. During this period, observe the safety valve. When the pressure value reaches the same as the preset value of the safety valve, check whether the safety valve starts to relieve pressure. If it does not start to relieve pressure or relieves pressure when the pressure does not reach the preset value, it is determined that the safety valve is unqualified. Then close the pump body 5. When the pressure in the tank body 2 gradually drains to the preset value, observe the safety valve. If it is still relieving pressure, it is judged as unqualified. When the tank body 2 presses upward, the tank body 2 will drive the upper annular plate 25 to press against the elastic member 26. When the tank body 2 returns downward, the elastic force of the elastic member 26 will make the tank body 2 move downward and reset more efficiently.

[0048] Before calibration and testing, start the drive motor 12. The elastic member 26 will be intermittently squeezed. When the elastic member 26 is squeezed, it will blow air to the inner bottom of the device hole 18 through the exhaust pipe 27. The air pressure in the device hole 18 will increase, which will cause the piston 19 to move upward and drive the pull rod 20 to move upward. The pull rod 20 will pull one end of the pressure lever 16 through the pull rope 21, and the other end of the pressure lever 16 will press downward on the flange of the safety valve. The working principle of the pressure lever 16 is similar to that of a seesaw, which can automatically complete the fixing work of the safety valve, making the operation more convenient. When the elastic member 26 elastically resets, it will suck in external air through the suction pipe 28. When the pressure at the inner bottom of the device hole 18 is too high, the overflow valve in the overflow pipe 29 will automatically open to discharge the excess air. And when it is necessary to uninstall the safety valve, manually open the overflow valve, and the air in the device hole 18 can also be discharged.

[0049] An air inlet 31 is provided on the outer wall of the above-mentioned support 1. A filter element 30 for filtering dust in the air is fixedly installed in the air inlet 31. The end of the suction pipe 28 is located in the cavity of the support 1.

[0050] Specifically, when the suction pipe 28 sucks in air, the suction pipe 28 will suck the cavity of the support 1, and the cavity of the support 1 will suck air through the air inlet 31. The filter element 30 in the air inlet 31 will filter the dust in the air. When the air passes through the cavity in the support 1, it can also take away part of the temperature on the pump body 5 and the drive motor 12, thereby completing the heat dissipation work to improve the working stability of the entire device.

[0051] A telescopic device 33 is fixedly installed at the bottom of the above-mentioned annular platform 4. The telescopic device 33 is an electric telescopic rod, and the telescopic end of the telescopic device 33 extends into the device hole 18.

[0052] Specifically, when it is necessary to push the piston 19 upward, just make the telescopic end of the telescopic device 33 push the piston 19 upward, and the use will be simpler and more convenient.

[0053] When this automated safety valve calibration device is in use, fix the port of the safety valve on the upper port of the communication pipe 3, and then open the pump body 5 and the valve 32. The pump body 5 will transport air into the tank body 2 to achieve pressure increase. The air in the tank body 2 will enter the safety valve through the communication pipe 3. During this period, observe the safety valve. When the pressure value reaches the same as the preset value of the safety valve, check whether the safety valve starts to relieve pressure. If it does not start to relieve pressure or relieves pressure when the pressure does not reach the preset value, it is judged that the safety valve is unqualified. Then close the pump body 5. When the pressure in the tank body 2 gradually drains to the preset value, observe the safety valve. If it is still relieving pressure, it is judged as unqualified.

[0054] During the calibration period, turn on the drive motor 12. The drive motor 12 will drive the reciprocating lead screw 11 to rotate, and the reciprocating lead screw 11 will drive the reciprocating slider 13 to reciprocate in the support 1 and drive the rack 10 to reciprocate. The rack 10 will drive the driven gear 9 to reciprocate, and the driven gear 9 will drive the tank body 2 to reciprocate through the vertical shaft 8. The tank body 2 will drive the safety valve at the top to reciprocate, so that the safety valve is tested and calibrated in a dynamic environment, improving the calibration and detection accuracy of the safety valve.

[0055] When the tank body 2 reciprocates, the tank body 2 will also drive the roller 22 at the bottom to reciprocate on the lower annular plate 23. When the roller 22 passes over the bump 24, the bump 24 will push the roller 22 upward, and the roller 22 will drive the tank body 2 and the safety valve at the top upward. When the roller 22 passes over the bump 24, the tank body 2 will drive the safety valve at the top to slide downward and reset. Therefore, the reciprocating tank body 2 will not only drive the safety valve to reciprocate, but also drive the safety valve to vibrate up and down, making the calibration environment of the safety valve more complex and closer to the actual situation, further improving the accuracy of calibrating the safety valve.

[0056] When the tank body 2 is pushed upward, the tank body 2 will drive the upper annular plate 25 to press the elastic member 26. When the tank body 2 returns downward, the elastic force of the elastic member 26 will make the tank body 2 move downward and reset more efficiently.

[0057] Before the calibration test, start the drive motor 12. The elastic member 26 will be intermittently squeezed. When the elastic member 26 is squeezed, it will blow air to the inner bottom of the device hole 18 through the exhaust pipe 27, and the air pressure in the device hole 18 will increase, causing the piston 19 to move upward and driving the pull rod 20 to move upward. The pull rod 20 will then pull one end of the pressure lever 16 through the pull rope 21, and the other end of the pressure lever 16 will press downward on the flange of the safety valve. The working principle of the pressure lever 16 is similar to that of a seesaw, which can automatically complete the fixing work of the safety valve and is more convenient to operate. When the elastic member 26 elastically resets, it will suck in outside air through the suction pipe 28. When the pressure at the inner bottom of the device hole 18 is too high, the overflow valve in the overflow pipe 29 will automatically open to discharge the excess air. And when it is necessary to unload the safety valve, manually opening the overflow valve can also discharge the air in the device hole 18.

[0058] When the suction pipe 28 sucks in air, the suction pipe 28 will suck air into the cavity of the support 1. The cavity of the support 1 will suck air through the air inlet 31, and the filter element 30 in the air inlet 31 will filter the dust in the air. When the air passes through the cavity in the support 1, it can also take away part of the temperature on the pump body 5 and the drive motor 12, thus completing the heat dissipation work and improving the working stability of the entire device.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automated safety valve calibration device, including a support (1) with a hollow interior, characterized in that, It further includes: A tank body (2) which is arranged on the support (1), wherein, a connecting pipe (3) is fixedly connected to the top of the tank body (2), a valve (32) is fixedly installed on the connecting pipe (3), a ring platform (4) is fixedly connected to the top of the connecting pipe (3), and a clamp is arranged on the ring platform (4); A pump body (5) fixedly installed on the tank body (2), wherein, the output end of the pump body (5) extends into the tank body (2), and a driving part for driving the tank body (2) to rotate reciprocally is arranged on the support (1); the driving part includes a driving motor (12) fixedly installed on the inner bottom of the support (1), a reciprocating lead screw (11) is fixedly installed on the output shaft of the driving motor (12), and a reciprocating slider (13) which is slidably connected to the inner wall of the support (1) is installed on the outer wall of the reciprocating lead screw (11). Wherein, a circular hole (7) is arranged on the support (1), the tank body (2) is sleeved in the circular hole (7), a vertical shaft (8) is fixedly connected to the bottom of the tank body (2), a driven gear (9) is fixedly installed on the outer wall of the vertical shaft (8), and a rack (10) which is meshed with the driven gear (9) is fixedly connected to the reciprocating slider (13); a lower annular plate (23) is fixedly connected to the inner wall of the support (1), a plurality of bumps (24) distributed circumferentially are fixedly connected to the lower annular plate (23), and a roller (22) which presses on the lower annular plate (23) is rotatably installed at the lower end of the tank body (2); an upper annular plate (25) is fixedly connected to the outer wall of the tank body (2), and an elastic member (26) is fixedly installed at the inner top of the support (1), and the telescopic end of the elastic member (26) presses tightly on the top of the upper annular plate (25); the clamp includes a plurality of brackets (14) fixedly connected to the ring platform (4), a pressing rod (16) is rotatably installed on each of the plurality of brackets (14) through a rotating rod (15), and a swinging part for driving the pressing rod (16) to swing is arranged on the ring platform (4); the swinging part includes a device hole (18) arranged on the ring platform (4), a piston (19) is slidably installed in the device hole (18), a pull rod (20) is fixedly connected to the piston (19), and the top of the pull rod (20) is connected to one end of the pressing rod (16) through a pull rope (21); the elastic member (26) is an elastic air bag, an air suction pipe (28) and an exhaust pipe (27) which are communicated with the elastic member (26) are fixedly connected to the elastic member (26), the end of the exhaust pipe (27) extends into the device hole (18), an overflow pipe (29) which extends to the outer wall of the ring platform (4) is arranged in the device hole (18), and an overflow valve is fixedly installed in the overflow pipe (29).

2. The automated safety valve calibration device according to claim 1, characterized in that, A plurality of circumferentially distributed positioning rods (6) are fixedly connected to the upper end of the ring platform (4), and a sealing ring is fixedly installed at the upper port of the connecting pipe (3).

3. An automated safety valve calibration device according to claim 1, characterized in that, An air inlet (31) is arranged on the outer wall of the support (1), a filter element (30) is fixedly installed in the air inlet (31), and the end of the air suction pipe (28) is located in the cavity of the support (1).

4. An automated safety valve calibration device according to claim 1, characterized in that, A telescopic device (33) is fixedly installed at the bottom of the annular table (4), and the telescopic end of the telescopic device (33) extends into the device hole (18).

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