Nuclear steam generator heat transfer tube helium mass spectrometer leak detection tube sheet sampling tool holder
A steam generator and heat transfer tube technology, which is used in the testing of instruments, machines/structural components, and by detecting the appearance of fluid at the leak point, etc. The number of heat transfer tubes is large, and there are problems such as radiation and contamination, which can shorten the detection time, improve the detection accuracy, and reduce the irradiation time.
Active Publication Date: 2019-06-07
CGNPC INSPECTION TECH +3
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Problems solved by technology
[0002] The helium leak detection technology of nuclear steam generator heat transfer tubes currently has the following problems: the number of inspected heat transfer tubes is large, and the single detection time is long; Sealed; there are risks of radiation and contamination in the inspection environment, and long-term exposure to the radiation environment will cause harm to operators; there are impurities such as radioactive dust in the heat transfer tube, which can easily block the pipeline and contaminate subsequent equipment
Method used
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Embodiment Construction
[0016] Below in conjunction with the embodiment shown in the accompanying drawings, the present invention is described in detail as follows:
[0017] Such as figure 1 As shown, the nuclear steam generator heat transfer tube helium mass spectrometer leak detection tube plate sampling tool frame includes an upper mounting frame 1, a suction gun 2 installed on the upper mounting frame 1 for sending the adopted gas into the mass spectrometer, so Above-mentioned mounting bracket 1 is provided with a plurality of suction holes 3 connected with the air compressor, in order to improve the efficiency of air extraction, the suction gun 2 is installed in the suction holes 3, in order to ensure the detection accuracy, the suction gun 2 Set coaxially with the suction hole, the upper end surface of the upper mounting bracket 1 is provided with a sealing gasket 4 , and the sealing gasket 4 is provided with an opening corresponding to the suction hole 3 .
[0018] Such as figure 2 As shown...
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The invention discloses a helium mass spectrometer leak detection tube sheet sampling tool rack for a nuclear steam generator heat-transfer pipe. The helium mass spectrometer leak detection tube sheet sampling tool rack comprises an upper mounting rack, and suction guns which are installed on the upper mounting rack and used for sending sampled gas into a mass spectrometer. The upper mounting rack is provided with multiple suction holes connected to multiple exhaust devices. The suction guns are installed in the suction holes. An upper end surface of the upper mounting rack is provided with a sealing gasket which is provided with openings corresponding to the suction holes. The invention adopts the multiple suction guns for simultaneous detection, thereby shortening detection time and improving efficiency. The sealing gasket can meet requirements for harmful chemical elements of tested equipment, and also can improve sealing between a detection device and a tube sheet contact surface so as to improve detection accuracy. With an adaptive device, the acting force of a tube sheet on the tool rack is buffered, the loss of equipment connectors is reduced, the equipment reliability is improved, and automatic attitude adjustment is achieved to adapt to different welding heights.
Description
technical field [0001] The invention relates to the field of nuclear power detection equipment, in particular to a sampling tool rack for helium mass spectrometer leak detection tube sheets of heat transfer tubes of nuclear steam generators. Background technique [0002] The helium leak detection technology of nuclear steam generator heat transfer tubes currently has the following problems: the number of inspected heat transfer tubes is large, and the single detection time is long; Sealing; there are risks of radiation and contamination in the inspection environment, and long-term exposure to the radiation environment will cause harm to operators; there are impurities such as radioactive dust in the heat transfer tube, which can easily block the pipeline and contaminate subsequent equipment. Contents of the invention [0003] The purpose of the present invention is to provide a nuclear steam generator heat transfer tube helium mass spectrometer leak detection tube plate sa...
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IPC IPC(8): G01M3/22G01M3/20
CPCG01M3/205G01M3/222
Inventor 严志刚眭霄翔刘步良张鑫王小刚
Owner CGNPC INSPECTION TECH