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CN-224216681-U - Experimental device for survey nonmetal sealing member and gaseous extinguishing agent compatibility

CN224216681UCN 224216681 UCN224216681 UCN 224216681UCN-224216681-U

Abstract

The utility model discloses an experimental device for measuring compatibility of a nonmetallic sealing element and a gas extinguishing agent, which comprises a rod body, wherein the upper end of the rod body is a threaded section, the lower end of the rod body is a smooth section, a supporting element is fixed on the end face of the lower end of the rod body, the nonmetallic sealing element is sleeved on the smooth section, two extrusion gaskets are sleeved on the rod body up and down and clamped on two sides of the nonmetallic sealing element, the lower surface of the extrusion gasket positioned below is abutted with the upper surface of the supporting element, and a locking nut is connected onto the threaded section in a threaded manner to apply axial pretightening force to enable the two extrusion gaskets to clamp the nonmetallic sealing element. The utility model solves the problems that the existing method can not re-etch the pressure condition of the nonmetallic sealing element during normal operation in the compatibility research of the gas extinguishing agent system, provides effective experimental data support for the application and the safety evaluation of the nonmetallic sealing element of the novel gas extinguishing agent system, and obviously improves the safety and the reliability of the whole life cycle of the novel gas extinguishing agent system.

Inventors

  • Chen Weiwang
  • WANG JIN
  • FANG JUNJIE

Assignees

  • 中国民航大学

Dates

Publication Date
20260508
Application Date
20250527

Claims (9)

  1. 1. An experimental set-up for determining compatibility of a nonmetallic seal with a gaseous extinguishing agent, comprising: The device comprises a rod body (1), wherein the upper end of the rod body (1) is a threaded section, and the lower end of the rod body is a smooth section, and a supporting piece (2) is fixed on the end face of the lower end of the rod body (1); the nonmetallic sealing piece (5) is sleeved on the smooth section, and the nonmetallic sealing piece (5) is sleeved on the smooth section; The two extrusion washers (4) are sleeved on the rod body (1) up and down and clamped on two sides of the nonmetal sealing piece (5), and the lower surface of the extrusion washer (4) positioned below is abutted with the upper surface of the supporting piece (2); And the locking nuts (6) are in threaded connection with the threaded sections so as to apply axial pretightening force to enable the two extrusion washers (4) to clamp the nonmetallic sealing pieces (5).
  2. 2. An experimental device for determining the compatibility of a nonmetallic sealing element with a gaseous extinguishing agent according to claim 1, characterized in that the lower surface of the lock nut (6) is press-fitted with the upper surface of the pressing washer (4) located above.
  3. 3. An experimental device for determining the compatibility of a nonmetallic sealing element with a gaseous extinguishing agent according to claim 2, characterized by further comprising a protective nut (7), said protective nut (7) being screwed onto said threaded section and having its lower surface abutting against the upper surface of said lock nut (6).
  4. 4. An experimental device for determining the compatibility of a nonmetallic sealing element with a gaseous extinguishing agent according to claim 1, characterized in that two opposite surfaces of the two extrusion washers (4) are respectively press-fitted with the upper and lower surfaces of the nonmetallic sealing element (5).
  5. 5. An experimental device for determining the compatibility of a nonmetallic sealing element with a gaseous extinguishing agent according to claim 1, characterized by further comprising a supporting washer (3), wherein the supporting washer (3) is sleeved on the smooth section, the lower surface of the supporting washer (3) is in press fit with the upper surface of the supporting element (2), and the upper surface thereof is in press fit with the lower surface of the pressing washer (4) located below.
  6. 6. An experimental device for determining the compatibility of a nonmetallic seal with a gaseous extinguishing agent according to claim 5, characterized in that the number of support washers (3) is not less than two.
  7. 7. An experimental device for determining the compatibility of a nonmetallic sealing element with a gaseous extinguishing agent according to claim 5, characterized in that the extrusion gasket (4), nonmetallic sealing element (5), support gasket (3) are all located in the smooth section of the rod body (1).
  8. 8. The experimental device for determining the compatibility of a nonmetallic sealing element with a gas extinguishing agent according to any one of claims 1 to 7, further comprising a sealing bottle (8), wherein the experimental device is positioned in the sealing bottle (8) and the lower surface of the supporting element (2) is abutted against the inner bottom wall of the sealing bottle (8), and the sealing bottle (8) is filled with the gas extinguishing agent (9).
  9. 9. An experimental device for determining the compatibility of a nonmetallic seal with a gaseous extinguishing agent according to claim 8, characterized in that the gaseous extinguishing agent (9) at least submerges the lock nut (6).

Description

Experimental device for survey nonmetal sealing member and gaseous extinguishing agent compatibility Technical Field The utility model relates to the technical field of fire extinguishing agents, in particular to an experimental device for measuring compatibility of a nonmetallic sealing element and a gas fire extinguishing agent. Background The nonmetallic sealing element in the novel gas fire extinguishing system is a key component for guaranteeing normal operation and fire extinguishing efficiency of the system, and the main functions comprise sealing and pressure maintaining, guaranteeing fire extinguishing effect and improving system reliability. The fire extinguishing agent in the gas fire extinguishing system is usually stored in a high-pressure container, the nonmetallic sealing element can ensure that the fire extinguishing agent in the container cannot leak into the external environment, meanwhile, the nonmetallic sealing element ensures that the pressure in the fire extinguishing agent storage container and a pipeline is stable, the influence of pressure fluctuation on the release speed and coverage area of the fire extinguishing agent is avoided, after the novel gas fire extinguishing system is started, the fire extinguishing agent in a protection area needs to reach a certain design concentration and is kept for a certain time to effectively extinguish fire, the nonmetallic sealing element can prevent the fire extinguishing agent from leaking in the protection area, ensure that the concentration of the fire extinguishing agent can reach and be maintained at a required level, thereby ensuring the fire extinguishing success rate, and the nonmetallic sealing element in the low-leakage high-sealing valve normally allows leakage gas to be discharged, prevents the leakage gas from accumulating in a pipeline to a certain extent to cause system malfunction, and closes the valve only when the inlet pressure reaches the set pressure, thereby ensuring the stable operation of the system and reducing the false alarm and false spraying conditions caused by leakage. If the sealing gasket with poor compatibility is selected, the problems of leakage, pressure loss and the like of the fire extinguishing system are easy to occur, if the sealing performance of a protection area is poor, the fire extinguishing agent can leak rapidly, the concentration is insufficient and the fire extinguishing cannot be successfully extinguished, driving gas (such as nitrogen) is used for pushing a container valve to open, the pressure of the driving gas is insufficient due to failure of a nonmetallic sealing element, the valve cannot be opened in time, and the release of the fire extinguishing agent is delayed. The nonmetallic sealing element is small, but is related to life and property safety, is an indispensable safety valve of a gas fire extinguishing system, and the material selection, the installation process and the periodic detection are the basis of the long-term safe and reliable service of the novel gas fire extinguishing device. The existing common non-metal sealing element compatibility method is mostly a non-pressure soaking experiment, wherein a non-metal sealing element material is soaked in a fire extinguishing agent, and the compatibility is evaluated by measuring physical property changes such as the mass, the volume, the hardness, the tensile strength and the like of the sealing material and observing the surface microscopic morphology changes of the sealing material. The method can realize the re-etching of key application elements such as temperature, humidity and the like under laboratory conditions, but cannot accurately simulate the pressure state of the nonmetallic sealing element when the nonmetallic sealing element normally works in a gas fire extinguishing system. Therefore, how to provide an experimental device for evaluating the compatibility of a nonmetallic sealing element and a novel gas extinguishing agent, which accurately simulates the contact of the nonmetallic sealing element and the extinguishing agent under the pressurized condition in a laboratory environment, has certain operability, can artificially set different pressures and can be repeatedly carved with different storage conditions, and is a problem to be solved by those skilled in the art. Disclosure of utility model In view of the above, the utility model provides an experimental device for determining the compatibility of a nonmetallic sealing element and a gas extinguishing agent, which is used for solving the problems that the existing method cannot etch the pressurized condition of the nonmetallic sealing element in normal operation in the compatibility research of the extinguishing agent system, providing effective experimental data support for the application and safety evaluation of the nonmetallic sealing element of a novel gas extinguishing agent system, obviously improving the safety and reliability of the whole life cycle