Emergency release device for cryogenic fluid handling arm

Abstract

The invention discloses an emergency release device for a low-temperature fluid loading and unloading arm. The upper valve core of the upper valve body of the self-sealing valve and the lower valve core of the lower valve body of the self-sealing valve are arranged on top of each other. The clamping force of the valve body and the lower valve body of the self-sealing valve disappears, and the emergency disengagement device starts to disengage under the force of the lower valve body of the self-sealing valve. During the disengagement process, the valve core gradually closes the valve port under the action of the return spring and the fluid medium , can effectively guarantee the sealing performance after separation, and its structure is compact and light in weight; the structure of the upper valve body of the self-sealing valve and the lower valve body of the self-sealing valve is fixed by a clamp assembly, which can ensure a small driving force and a short driving stroke; The integration of three inclined planes can ensure the correct separation logic and reliable action; by reducing the overall weight of the emergency release device and setting process threaded holes in the valve body, the workload of self-recovery after the emergency release device is disengaged is reduced.

Description

technical field [0001] The invention relates to components of marine low-temperature fluid delivery equipment, in particular to an emergency release device for a low-temperature fluid loading and unloading arm. Background technique [0002] Cryogenic fluid loading and unloading arms can be used for land transportation (including train transportation and automobile transportation) and water transportation (including ocean transportation and river transportation). Cryogenic loading and unloading arms for ocean and river transportation are also called marine low-temperature loading and unloading arms. During the operation of the cryogenic fluid loading and unloading arm, once an emergency occurs (such as cryogenic liquid leakage, fire, or the angle of deformation of the loading and unloading arm is too large, etc.), in order to ensure that the output end (filling station, etc.) and the injection end (ships, cars, etc.) For safety, the separation needs to be completed in the sho...

AI Technical Summary

Problems solved by technology

However, the general threaded connection cannot meet the requirements of quick separation. In this case, it is necessary to install an emergency release device on the cryogenic loading and unloading arm.

[0003] At present, there are mainly two structural forms of emergency release devices on the market. One is a double ball valve structure. Although this scheme has high structural reliability and small liquid resistance of the ball valve, the sealing performance is determined by the performance of the ball valve. The quality of the current cryogenic ball valve cannot Guarantee, at the same time, the required driving output force is large, the stroke is long, the structure is complex and the weight is heavy; the other structure is the double plate valve structure, which has a simple structure, small output force and short stroke, but it is separated from the rear valve. The seal between the core and the valve body is difficult to guarantee

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