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CN-224231174-U - Sealing test blanking cover of safety valve

CN224231174UCN 224231174 UCN224231174 UCN 224231174UCN-224231174-U

Abstract

The utility model discloses a sealing test plug cover of a safety valve, which comprises a safety valve body, a plugging unit, a leakage prompting unit and a pneumatic rotating assembly, wherein the plugging unit comprises a plugging cover, the plugging cover is fixed at the gas transmission end of the safety valve body through bolts and nuts, the top of the plugging cover is provided with an annular groove for gas to enter, the leakage prompting unit comprises a gas spraying pipe fixedly connected to the side wall of the plugging cover, one end of the gas spraying pipe penetrates into the annular groove of the plugging cover and is communicated with the annular groove, and the leakage prompting unit further comprises the pneumatic rotating assembly for detecting the gas flow in the gas spraying pipe. When the sealing between the plugging cover and the safety valve body fails, leaked gas can enter the gas spraying pipe to drive the pneumatic rotating assembly to operate by utilizing the gas flow in the gas spraying pipe, so that an operator is timely reminded of gas leakage, and deviation of sealing test data caused by leakage is avoided.

Inventors

  • LIU FENG
  • LIU WEI
  • Zhao Ningliang

Assignees

  • 南京晟天检测科技有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (8)

  1. 1. The sealed experimental blanking cover of relief valve, its characterized in that includes: a safety valve body (100); The plugging unit (200) comprises a plugging cover (201), wherein the plugging cover (201) is fixed at the gas transmission end of the safety valve body (100) through bolts and nuts, and an annular groove (203) for gas to enter is formed in the top of the plugging cover (201); The leakage prompting unit (300) comprises an air jet pipe (301) fixedly connected to the side wall of the plugging cover (201), one end of the air jet pipe (301) penetrates into the annular groove (203) of the plugging cover (201) and is communicated with the annular groove (203), and the leakage prompting unit (300) further comprises a pneumatic rotating assembly (302) for detecting the gas flow in the air jet pipe (301).
  2. 2. The safety valve sealing test plugging cover according to claim 1, wherein a sealing groove (204) with the diameter smaller than that of the annular groove (203) is formed in the top of the plugging cover (201), a detachable sealing ring (205) is arranged in the sealing groove (204) in a sliding mode, and the sealing ring (205) protrudes out of the surface of the plugging cover (201).
  3. 3. The safety valve sealing test plug cover according to claim 2, wherein a mounting hole (206) communicated into the sealing groove (204) is formed in the bottom of the plug cover (201), and a sealing piece (207) for sealing the mounting hole (206) is arranged at the bottom of the plug cover (201).
  4. 4. The sealing test plug cover for the safety valve according to claim 3, wherein the sealing element (207) comprises a sealing screw sleeve (207 a) fixed at the bottom of the sealing cover (201), an opening at the bottom of the mounting hole (206) is positioned in the sealing screw sleeve (207 a), and a detachable sealing cover (207 b) is sleeved at the bottom of the sealing screw sleeve (207 a) in a threaded manner.
  5. 5. The safety valve sealing test blanking cover of claim 1, wherein the pneumatic rotating assembly (302) comprises a connecting rod (302 a) fixedly connected to the side wall of the air spraying pipe (301), a rotating rod (302 b) is rotatably connected to the bottom end of the connecting rod (302 a), and a plurality of deflection plates (302 c) distributed in an annular mode are fixedly connected to the side wall of the rotating rod (302 b).
  6. 6. The seal test plug cover for the safety valve according to claim 5, wherein the connecting rod (302 a) is obliquely arranged, and the rotating rod (302 b) is not located on the axis of the air injection pipe (301).
  7. 7. The seal test plug cover for the safety valve according to claim 6, wherein a wind shield (303) is sleeved on the outer wall of the air injection pipe (301), the wind shield (303) is arranged in a transparent mode, and the pneumatic rotating assembly (302) is located in the wind shield (303).
  8. 8. The sealing test plug cover of the safety valve according to claim 7, wherein a whistle port (304) is formed in the outer wall of the air injection pipe (301), and part of air flowing in the air injection pipe (301) is discharged through the whistle port (304).

Description

Sealing test blanking cover of safety valve Technical Field The utility model relates to the technical field of safety valves, in particular to a sealing test blanking cover of a safety valve. Background The safety valve is a special valve which is in a normally closed state under the action of external force, when the pressure of medium in the equipment or the pipeline rises to exceed a specified value, the medium in the pipeline or the equipment is prevented from exceeding the specified value by discharging the medium to the outside of the system, and the safety valve belongs to automatic valves and is mainly used on boilers, pressure vessels and pipelines, and the control pressure does not exceed the specified value, so that the safety valve plays an important role in protecting personal safety and equipment operation. When carrying out sealing performance test to the relief valve, need carry out effective shutoff with the output of relief valve to the inside injection gas of relief valve detects its sealed effect, when adopting the flange lid to carry out the shutoff operation to the one end of relief valve, whether the user hardly knows closely between flange lid and the relief valve, along with pressure increase gradually, partial gas can leak from relief valve and flange lid junction, and when the leak point is less, the user probably is difficult to perceive, thereby causes test data can't truly reflect its actual sealing performance, consequently, proposes the experimental blanking cover of relief valve seal. Disclosure of utility model This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model. The utility model is provided in view of the problems of the prior safety valve sealing test plug. Therefore, the utility model aims to provide a sealing test plugging cover for a safety valve, which is suitable for solving the problems that a user hardly knows whether the flange cover is tightly attached to the safety valve or not, partial gas possibly leaks from the joint of the safety valve and the flange cover along with the gradual increase of the pressure in the safety valve, and the user cannot easily perceive the leakage point when the leakage point is smaller, so that the test data cannot truly reflect the actual sealing performance of the safety valve. In order to solve the technical problems, the utility model provides the following technical scheme that the safety valve sealing test blanking cover comprises: a safety valve body; The plugging unit comprises a plugging cover, wherein the plugging cover is fixed at the gas transmission end of the safety valve body through bolts and nuts, and an annular groove for gas to enter is formed in the top of the plugging cover; the leakage prompting unit comprises an air jet pipe fixedly connected to the side wall of the plugging cover, one end of the air jet pipe penetrates into the annular groove of the plugging cover and is communicated with the annular groove, and the leakage prompting unit further comprises a pneumatic rotating assembly for detecting the gas flow in the air jet pipe. As a preferable scheme of the sealing test plugging cover of the safety valve, the top of the plugging cover is provided with a sealing groove with the diameter smaller than that of the annular groove, a detachable sealing ring is arranged in the sealing groove in a sliding mode, and the sealing ring protrudes out of the surface of the plugging cover. As an optimal scheme of the safety valve sealing test plugging cover, the bottom of the plugging cover is provided with the mounting hole communicated into the sealing groove, and the bottom of the plugging cover is provided with the sealing piece for sealing the mounting hole. As a preferable scheme of the sealing test plug cover of the safety valve, the sealing element comprises a sealing screw sleeve fixed at the bottom of the plug cover, an opening at the bottom of the mounting hole is positioned in the sealing screw sleeve, and a detachable sealing cover is sleeved at the bottom of the sealing screw sleeve in a threaded manner. As a preferable scheme of the safety valve sealing test blanking cover, the pneumatic rotating assembly comprises a connecting rod fixedly connected to the side wall of the air spraying pipe, the bottom end of the connecting rod is rotatably connected with a rotating rod, and the side wall of the rotating rod is fixedly connected with a plurality of deflection plates distributed in an annular mode. As an optimal scheme of the sealing test blanking cover of the safety valve, the connecting rod is obliquely arranged, and the rotating rod is not positioned on the axis of the air spraying pipe. As a preferable sch