An airtight test connection device used to protect the valve nozzle after surface treatment
A technology for air tightness test and connection device, which is used in measuring device, fluid tightness test, machine/structural component test, etc. It can solve problems such as abnormal rocket launch and failure, improve the connection strength, and prevent the valve from being scrapped. Effect
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[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0022] The invention provides an airtight test connection device for protecting the surface-treated valve nozzle, which can effectively ensure that the surface of the valve nozzle is not damaged by the thread of the test nozzle, and protect the integrity of the film layer on the surface of the nozzle.
[0023] Such as figure 1 Shown is a schematic diagram of an airtight test connection device. It can be seen from the figure that an airtight test connection device used to protect the valve nozzle after surface treatment includes a screw core 1, a screw sleeve 2 and an outer nut 3; among them, the screw core 1 It is a hollow stepped columnar structure; the screw sleeve 2 is a hollow stepped columnar structure; the outer casing nut 3 is a hollow columnar structure with a groove inside; the screw sleeve 2 is fixedly set on the outer wall of the scre...
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