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Non-contact leakage detecting method of double-layered packing sealing structure and system

A technology of double-layer packing and sealing structure, which is applied in the direction of measuring the rate of increase and deceleration of the fluid, using liquid/vacuum degree to measure the liquid tightness, etc., and can solve the problems that cannot be applied.

Active Publication Date: 2012-07-25
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

[0003] Commonly used sealing leak detection technologies such as pressure change leak detection method, bubble leak detection method and helium mass spectrometry leak detection method are all applied to static sealing equipment, but dynamic sealing devices that require real-time monitoring (such as double-layer packing sealing structure) cannot Applications, especially in radioactive environments, where it is not feasible to directly measure the leakage of sealed fluids with general detection elements with non-metallic materials

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  • Non-contact leakage detecting method of double-layered packing sealing structure and system
  • Non-contact leakage detecting method of double-layered packing sealing structure and system
  • Non-contact leakage detecting method of double-layered packing sealing structure and system

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Embodiment Construction

[0020] The present invention will be described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The non-contact leak detection method and system of the double-layer packing sealing structure disclosed by the present invention, wherein the double-layer packing sealing structure is as follows figure 1 As shown, the upper packing 1 and the lower packing 4 are located between the rotating shaft 2 and the stuffing box 7, the sealed liquid is at the upper end of the upper packing 1, a packing support 6 is set between the upper packing 1 and the lower packing 4, and the outer side of the packing support 6 An annular groove is provided, and a closed chamber is formed between the annular groove and the inner wall of the stuffing box 7, and the air inlet pipe 3 and the air outlet pipe 5 are respectively set on the chamber, and the air source 8 enters into the A sealed air chamber 13 with a certain pressure is formed in the airtight chamber of the do...

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Abstract

The invention discloses a non-contact leakage detecting method of a double-layered packing sealing structure and a system. A packing support (6) is arranged between double packing layers (1 and 4), the double packing layers (1 and 4) are separated by the packing support (6), so that a closed cavity is formed, an air inlet tube (3) and an air outlet tube (5) are respectively arranged on the closed cavity, an air source supplies air for the closed cavity via the air inlet tube (3), the closed cavity becomes a closed air cavity with certain pressure, a pressure transmitter arranged on the outside of a heat chamber measures the pressure of the closed air cavity, and the dynamic sealing effect of the sealing device in a radioactivity environment can be monitored in real time.

Description

technical field [0001] The invention relates to a leak detection method and system of a sealing structure, in particular to a method and system for detecting the sealing effectiveness of a dynamic seal in real time in a non-contact manner, which can be applied in radioactive occasions. Background technique [0002] The double-layer packing seal structure is generally used in the shaft sealing device, including the upper packing and the lower packing arranged between the main shaft and the stuffing box. The packing seal assembly cooperates with the mechanical seal assembly to realize the sealing function of the mechanical equipment shaft. [0003] Commonly used sealing leak detection technologies such as pressure change leak detection method, bubble leak detection method and helium mass spectrometry leak detection method are all applied to static sealing equipment, but dynamic sealing devices that require real-time monitoring (such as double-layer packing sealing structure) ca...

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Application Information

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IPC IPC(8): G01M3/26
Inventor 胡锡文吴华夏国正刘存银亢之义
Owner CHINA NUCLEAR POWER ENG CO LTD
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