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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

Active Publication Date: 2021-01-12
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As aerospace products are developing in the direction of high precision, any defect may cause abnormalities in the launch of the rocket, or even lead to failure, so it is necessary to ensure that each part is in a normal state and meets the performance requirements

Method used

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  • An airtight test connection device used to protect the valve nozzle after surface treatment
  • An airtight test connection device used to protect the valve nozzle after surface treatment
  • An airtight test connection device used to protect the valve nozzle after surface treatment

Examples

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Embodiment Construction

[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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PUM

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Abstract

An airtight test connection device for protecting the surface-treated valve nozzle, which relates to the field of protection of important control parts in rocket engines; it includes a screw core, a screw sleeve and an outer nut; wherein, the screw core is a hollow stepped columnar structure; the screw core The sleeve is a hollow stepped columnar structure; the outer casing nut is a hollow cylindrical structure with a C-shaped cross section; the screw sleeve is fixedly set on the outer wall of the screw core; and the steps of the screw sleeve and the steps of the screw core are locked; The direction sleeve is on the outer wall of the screw sleeve; and the open end of the outer nut and the step of the screw sleeve are locked; the screw core and the screw sleeve are connected through thread fit; the screw sleeve and the outer nut are connected through thread fit; the airtight test connection device The two ends are respectively connected with the external test bench joint and the valve airtight nozzle after external surface treatment; the invention effectively ensures that the surface of the valve airtight nozzle is not damaged by the thread of the test bench nozzle, and protects the integrity of the film layer on the surface of the nozzle .

Description

technical field [0001] The invention relates to the field of protection of important control components in rocket engines, in particular to an airtight test connection device used to protect valve joints after surface treatment. Background technique [0002] The valve is an important control part in the rocket engine, and its quality directly affects the success or failure of the spacecraft launch. Each valve must be reliable and effective in the flight environment before it is installed in the rocket engine, so the valve must be tested for air tightness inspection and other tests. However, in order to ensure the corrosion resistance of the surface of valve parts and components, a dense film layer needs to be added on the surface of some parts and components to ensure that no corrosion effect occurs between the external environment and oxidants. During the airtight test of the valve, the stainless steel airtight nozzle of the test bench is connected to the airtight nozzle o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/02
CPCG01M3/025
Inventor 赵保科张勇峰郭研王召杨生旭
Owner XIAN SPACE ENGINE CO LTD
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