A special-shaped joint adapter device for aerospace special valves

Abstract

The invention discloses an adapter device for a special-shaped connector of a special aerospace valve. The adapter device for the special-shaped connector of the special aerospace valve comprises a pipe joint nozzle, a screw sleeve, an outer sleeve, a seal ring, a taper sleeve and a seal rod, wherein the pipe joint nozzle is a hollow rotary body; a limiting step is arranged on the outer wall of the right end; external screw threads are arranged at two ends of the outer wall of the pipe joint nozzle; the screw sleeve is screwed onto the outer wall of the right end of the pipe joint nozzle; theright end of the screw sleeve and the right end of the pipe joint nozzle are on the same plane; an embedded cavity is formed between the pipe joint nozzle and the screw sleeve; the small end head of the special-shaped connector is embedded into the embedded cavity; the inner wall of the special-shaped connector at the embedded part fits to the outer wall of the pipe joint nozzle; the limiting stepis in butt joint with a smooth step, and the butt-joint part is sealed by the seal ring; the taper sleeve is of a tapered rotary body structure and is arranged on the right side of the smooth step ofthe small end head of the special-shaped connector; the outer sleeve is screwed onto the outer wall of the screw sleeve; and the taper sleeve is extruded into the embedded cavity. The fixed connection and the cavity communication between the pipe joint nozzle and the special-shaped connector are realized, so that the connection problem of the test of the special aerospace valve with the special-shaped connector is solved.

Description

technical field [0001] The invention relates to an adapter device for special-shaped joints of aerospace special valves, which belongs to the sealing field of rocket pressurized conveying systems and ground test systems. Background technique [0002] The circulation medium of aerospace valves includes not only normal temperature helium, nitrogen, but also liquid hydrogen and liquid oxygen, etc. The temperature covers the range of +60°C to -253°C. High (up to 35MPa), the air pressure of the acceptance test of the valve product is also the same as the working air pressure. At present, some aerospace valve products have strange shapes of nozzles, high requirements for the nozzle surface to be non-destructive, and many times of docking and disassembly during the test process, which makes it difficult to realize the test connection and sealing of such valve products. [0003] For the existing special-shaped nozzles of aerospace special valves, since they have no threaded connect...

AI Technical Summary

Problems solved by technology

At present, some aerospace valve products have strange shapes of nozzles, high requirements for the nozzle surface to be non-destructive, and many times of docking and disassembly during the test process, which makes it difficult to realize the test connection and sealing of such valve products.

[0003] For the existing special-shaped nozzles of aerospace special valves, since they have no threaded connection and only have small smooth steps for welding, they cannot be connected with traditional test fixtures, such as bell mouths and sealing ball heads; and the product has a thin-walled structure, The minimum wall thickness is 1mm, the size is small, the radial size is within 10mm, the test pressure is 35MPa, the test environment is harsh, and the temperature range of liquid nitrogen and liquid hydrogen is characteristic. The general test connection method cannot meet the test requirements of this kind of valve products. , a new experimental connection technology is needed to solve this problem

Images