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CN-121783539-B - Online check tool of relief valve

CN121783539BCN 121783539 BCN121783539 BCN 121783539BCN-121783539-B

Abstract

The invention relates to the technical field of inspection tools, in particular to an online inspection tool for a safety valve, which comprises a force transducer, a bracket, a traction device and a connector connected with a valve clack of the safety valve, wherein the connector comprises a connecting rod and a hook, the connecting rod is a folding rod, the connecting rod and the hook can be conveniently and rapidly stretched into the safety valve to adapt to the connection requirement of a square valve clack structure when the safety valve is subjected to online inspection through the arrangement of the connector, and the bending structure of the connecting rod can cope with the situation that an opening of an adjusting cover does not correspond to or does not completely correspond to the valve clack, and can meet the inspection requirement of the safety valve under different conditions only by rotating and adjusting the connector and gradually screwing in.

Inventors

  • LUO LINGLING
  • LIU SHIRAN
  • WANG FEI
  • DING YU
  • ZHOU YU
  • LI XIUQUAN
  • FENG ZHEN
  • ZHANG XUELIN
  • HUANG SONG
  • LI JIANGHONG

Assignees

  • 重庆市特种设备检测研究院(重庆市特种设备事故应急调查处理中心)

Dates

Publication Date
20260508
Application Date
20260306

Claims (6)

  1. 1. An on-line checking tool of a safety valve comprises a force transducer (1), a bracket (2) and a traction device (3), and is characterized by further comprising a connector connected with a valve clack (51) of the safety valve; The connector comprises a connecting rod (4) and a hook (41), wherein the hook (41) is connected with one end of the connecting rod (4), the hook (41) is used for being connected with a valve clack (51), the number of the connectors is a plurality, the connectors are uniformly distributed in the circumference direction in the safety valve based on the axis of the safety valve, the length direction of the connectors is parallel to the axis of the safety valve, the free ends of the connecting rods (4) are commonly connected with connectors, and the connectors are connected with a force transducer (1); the connecting rod (4) is a folding rod; The traction device (3) is arranged at the upper end of the bracket (2), the force transducer (1) is arranged in the middle of the bracket (2) and is connected with an output shaft of the traction device (3), and the bracket (2) is connected with the valve body (5) or a pipeline provided with a safety valve; the connector comprises a disc seat (42) and pin heads (43), the disc seat (42) is connected with a plurality of connecting rods (4), the pin heads (43) are arranged in the middle of the other end of the disc seat (42), and the force transducer (1) is provided with pin tails (44) connected with the pin heads (43); The disc seat (42) is also provided with a pipe diameter adjusting component, and the pipe diameter adjusting component is used for synchronously adjusting the distance between a plurality of connecting rods (4) and the center of the disc seat (42) so as to adapt to the check use of safety valves with different pipe diameters; The pipe diameter adjusting assembly comprises a cam (6), an elastic piece (61) and an adjusting fixing piece, wherein the cam (6) is rotationally arranged at the center of a disc seat (42) and is positioned at one side of the disc seat (42) connected with a connecting rod (4), the number of protruding parts (60) of the cam (6) is consistent with that of the connecting rod (4), the protruding parts (60) are in sliding butt with the side wall of the connecting rod (4), the disc seat (42) is provided with a guide rail (63), the connecting rod (4) is in sliding connection with the guide rail (63), the elastic piece (61) is arranged between the connecting rod (4) and the disc seat (42) and pushes the connecting rod (4) to move towards the center of the disc seat (42) in a silent state, and the adjusting fixing piece is arranged on the disc seat (42) and is in transmission connection with the cam (6).
  2. 2. An on-line checking tool of a safety valve comprises a force transducer (1), a bracket (2) and a traction device (3), and is characterized by further comprising a connector connected with a valve clack (51) of the safety valve; The connector comprises a connecting rod (4) and a hook (41), wherein the hook (41) is connected with one end of the connecting rod (4), the hook (41) is used for being connected with a valve clack (51), the number of the connectors is a plurality, the connectors are uniformly distributed in the circumference direction in the safety valve based on the axis of the safety valve, the length direction of the connectors is parallel to the axis of the safety valve, the free ends of the connecting rods (4) are commonly connected with connectors, and the connectors are connected with a force transducer (1); the connecting rod (4) is a folding rod; The traction device (3) is arranged at the upper end of the bracket (2), the force transducer (1) is arranged in the middle of the bracket (2) and is connected with an output shaft of the traction device (3), and the bracket (2) is connected with the valve body (5) or a pipeline provided with a safety valve; the connector comprises a disc seat (42) and pin heads (43), the disc seat (42) is connected with a plurality of connecting rods (4), the pin heads (43) are arranged in the middle of the other end of the disc seat (42), and the force transducer (1) is provided with pin tails (44) connected with the pin heads (43); The disc seat (42) is also provided with a pipe depth adjusting component which is used for adjusting the interval size between the disc seat (42) and the safety valve after the connecting rods (4) extend into the safety valve so as to adapt to the check use of the safety valves with different pipe depths; the pipe depth adjusting assembly comprises an outer adjusting cylinder (7) and a reinforcing disc (71), the reinforcing disc (71) is rotationally connected with the outer adjusting cylinder (7) and forms a cylindrical structure with an open upper end, the upper portion of the connecting rod (4) is connected with the reinforcing disc (71) in a sliding penetrating mode, the outer adjusting cylinder (7) is in threaded connection with the disc seat (42), and the disc seat (42) is integrally located in the outer adjusting cylinder (7).
  3. 3. An on-line verification tool for safety valves according to claim 1 or 2, wherein the number of connectors is two or four.
  4. 4. An on-line check tool for a safety valve according to claim 1 or 2, wherein the hooks (41) are in an arc-shaped strip-like structure.
  5. 5. The tool for on-line verification of a safety valve according to claim 4, wherein the connecting rod (4) is connected to the end of the hook (41).
  6. 6. The on-line checking tool for a safety valve according to claim 4, wherein the connecting rod (4) is a folded rod with a Z-shaped structure, and the extending direction of the hook (41) is the same as the bending direction of the connecting rod (4).

Description

Online check tool of relief valve Technical Field The invention relates to the technical field of inspection tools, in particular to an online inspection tool for a safety valve. Background In the low-temperature pipeline, the valve-rod-free safety valve is used as a core safety protection component, and the core function of the valve-rod-free safety valve is to ensure that the pressure of a pipeline system is maintained in a preset safety range, and when the pressure of medium in the pipeline exceeds an allowable threshold value, the overpressure medium is released in time, so that the pipeline and downstream associated equipment are prevented from being damaged due to overpressure, and the stable and safe operation of the whole pipeline system is ensured. In order to ensure that the safety valve can normally operate to play a role in protection, the safety valve needs to be checked regularly. At present, aiming at the online verification mode of the valve stem-free safety valve, the core principle is that an upward lifting force is applied to the valve clack, meanwhile, the jacking force of medium pressure in a pipeline acting on the sealing surface of the valve clack is combined, under the synergistic effect of the two forces, the valve clack and the valve seat of the safety valve are sealed and separated, and then, the three core parameters of the sealing area of the safety valve (the joint area of the valve seat and the sealing surface of the valve clack), the external lifting force applied to the valve clack and the actual operating pressure of equipment (the operating pressure is required to be lower than 90% of the setting pressure of the safety valve) are calculated according to a preset professional algorithm, and finally, the actual setting pressure of the safety valve is obtained, so that the online verification work is completed. The existing safety valve comprises a valve body, a valve clack, a valve seat, a sealing head, a spring and an adjusting cover, wherein the valve clack is integrally of square structure design, a guide groove preset on the inner wall of the valve body is matched with the valve body in a sliding mode, the upper and lower reciprocating sliding can be realized along the guide groove, a preset interval is reserved between the lower end of the valve clack and the valve body, the adjusting cover is of a cross-shaped structure, an opening is formed in the side portion of the adjusting cover, and when the safety valve is used for pressure relief, pressure is mainly released from a gap among the valve seat, the valve clack and the valve body, and the safety valve is different from a pressure relief structure of a part of old safety valves, and the safety valve is free from structures such as a pressure relief hole and the like, and is larger in pressure relief area and better in structural rigidity. However, when the valve clack with a square structure is subjected to on-line detection and verification, the problem that traction lifting is inconvenient and the verification tool is inconvenient to connect exists at present. Disclosure of Invention The invention aims to provide an online checking tool for a safety valve, which solves the problem that the checking tool in the prior art is inconvenient to install and operate. The invention solves the technical problems by the following technical means: An on-line checking tool of a safety valve comprises a force transducer, a bracket, a traction device and a connector connected with a valve clack of the safety valve; the connector comprises a connecting rod and hooks, wherein the hooks are connected with one end of the connecting rod and are used for being connected with the valve clack, the number of the connectors is a plurality, the connectors are circumferentially and uniformly distributed in the safety valve based on the axis of the safety valve, the length direction of the connectors is parallel to the axis of the safety valve, the free ends of the connecting rods are commonly connected with connectors, and the connectors are connected with the force transducer; The connecting rod is a folding rod; The traction device is arranged at the upper end of the support, the force transducer is arranged in the middle of the support and is connected with an output shaft of the traction device, and the support is connected with the valve body or a pipeline provided with a safety valve. By means of the structural design, when the safety valve is checked, the connector can be conveniently connected with the valve clack, then the check test is carried out, and the check connection requirement of the valve clack with the square structure is met. Further defined, the number of connectors is two or four. By means of the structural design, when the number of the connectors is two, the convenience of connection can be improved, and when the number of the connectors is four, the stability of connection can be improved. Further defined, the hooks