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Method for inspecting performance of sealing gasket for nuclear power equipment

A technology for sealing gaskets and inspection methods, which is applied in the direction of using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problems such as the inability to realize the localization of sealing gaskets, the difficulty in predicting and guaranteeing the sealing performance of gaskets, and restricting independent manufacturing.

Active Publication Date: 2013-08-07
SUZHOU BMC SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sealing gaskets used in nuclear power equipment use the sealing surface of the gasket and the end surface of the connecting piece (usually a connecting flange) to achieve a sealing effect by pressing against a certain sealing ratio. In the process of frequent changes in temperature and pressure, The sealing performance of the gasket is difficult to predict and guarantee. There is no effective inspection device or method to test the sealing performance and service life of the above-mentioned sealing gaskets for nuclear power equipment in my country, which will restrict the use of sealing gaskets for nuclear power equipment in China. Self-manufacturing, resulting in the delay in the realization of the localization of sealing gaskets for nuclear power equipment

Method used

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  • Method for inspecting performance of sealing gasket for nuclear power equipment
  • Method for inspecting performance of sealing gasket for nuclear power equipment
  • Method for inspecting performance of sealing gasket for nuclear power equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0040] refer to figure 1 and figure 2 , according to the special inspection device for sealing gaskets for nuclear power equipment in this embodiment, including:

[0041] An autoclave, the autoclave includes a cylinder 1 with openings at the top and bottom, an upper flange 2 and a lower flange 3 detachably arranged at the top opening and the bottom opening of the cylinder 1 respectively, the following method The flange plate 3 is provided with a plurality of interfaces 4 for connecting external pipelines and control elements; during inspection, take two pieces of sealing gaskets 12 to be tested, one of which is placed on the upper end surface of the upper flange plate 2 and the cylinder body 1 Between, another pad is placed between the lower flange 3 and the lower end surface of the cylinder 1; between the upper flange 2 or the lower flange 3, the sealing gasket 12 and the cylinder 1 through threaded fasteners 9 are connected and the sealing gasket 12 is compressed ac...

Embodiment 2

[0050] This embodiment provides an inspection method for inspecting the sealing gasket for nuclear power equipment using the inspection device in Embodiment 1, that is, the strength hydrostatic test method.

[0051] The test condition of described strength hydrostatic test method is:

[0052] Test temperature: room temperature

[0053] Test medium: deionized water

[0054] Test water pressure range: 0.1MPa ~50MPa

[0055] Include the following steps:

[0056] (1) Take two pieces of sealing gaskets and place them between the upper flange 2 and the upper end surface of the cylinder 1, and between the lower flange 3 and the lower end surface of the cylinder 1, and use the gaskets for nuclear power equipment The sealing specific pressure of the sheet requires loading and tightening;

[0057] (2) Fill water into the barrel 1 of the autoclave through the high-pressure water pump 13, and open the exhaust device 7 at the same time; after the barrel 1 is filled with...

Embodiment 3

[0061] This embodiment provides another inspection method using the inspection device in Embodiment 1 to inspect the sealing gasket for nuclear power equipment, that is, the large temperature difference thermal cycle test method.

[0062] The test condition of described large temperature difference thermal cycle test method is:

[0063] Test temperature: ≤364°C

[0064] Test medium: deionized water

[0065] Test water pressure range: ≤17.2MPa

[0066] Heating rate: ≥90℃ / h

[0067] Include the following steps:

[0068] (1) Take two pieces of sealing gaskets and place them between the upper flange 2 and the upper end surface of the cylinder 1, and between the lower flange 3 and the lower end surface of the cylinder 1, and use the gaskets for nuclear power equipment The sealing specific pressure of the sheet requires loading and tightening;

[0069] (2) Inject water into the barrel 1 of the autoclave through the high-pressure water pump 13, and at the same ...

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Abstract

The invention relates to a method for inspecting the performance of a sealing gasket for nuclear power equipment. The method provided by the invention comprises a strength hydrostatic testing method for inspecting the sealing gasket by cyclically changing the pressure in a sealing container and a high-temperature-difference thermal cycle testing method for inspecting the sealing gasket by cyclically changing the temperature and pressure in the sealing container. In the method provided by the invention, the actual operating conditions of different nuclear power equipment are simulated through a special inspecting device according to the actual operating conditions of the different nuclear power equipment in the mode of changing the pressure and / or alternating the temperature; the sealing and reliability of the sealing gasket are tested and inspected; the parameters of important guiding significances on the manufacturing and improvement of the sealing gasket can be obtained; and the final installation parameters of the sealing gasket can be obtained, thereby providing effective help for searching the leakage reason of the nuclear power equipment at present (such as the leakage problem in the sealing gasket with a nuclear power voltage stabilizer manhole). The method provided by the invention fills in gaps of a detection and test technique of the sealing gasket for the nuclear power equipment in China.

Description

technical field [0001] The invention relates to a method for testing the performance of sealing gaskets used in nuclear power equipment, which mainly simulates the working conditions of nuclear power equipment in actual operation by controlling the transformation mode of temperature and pressure, and performs inspection of the sealing performance of sealing gaskets used in nuclear power equipment . Background technique [0002] Sealing gaskets for nuclear power equipment (such as manhole sealing gaskets) are mainly used in nuclear power plant equipment. They are sealing gaskets with the highest nuclear safety level, manufacturing level and quality level. Under this circumstance, the zero leakage of the system must be guaranteed to escort the safe operation of the nuclear power plant. For this reason, the sealing performance and service life of sealing gaskets used in nuclear power equipment are crucial to the safe operation of nuclear power plants. At present, the sealing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/02
Inventor 马志刚韩嘉兴
Owner SUZHOU BMC SEALING TECH CO LTD