Self-tightening type quick-mounted anti-explosion vacuum-pumping device

Abstract

The invention relates to a self-tightening type quick-mounted anti-explosion vacuum-pumping device, and belongs to the technical field of vacuum-pumping of low temperature insulating pressure container. The self-tightening type quick-mounted anti-explosion vacuum-pumping device comprises a quick-mounted joint and a quick-mounted anti-explosion valve. A threaded end of the quick-mounted joint is in threaded connection with a hose of a vacuumizing set. The quick-mounted anti-explosion valve is welded on a shell of a liquefied natural gas bottle. One quick-mounted anti-explosion valve is welded on the shell of each liquefied natural gas bottle. The self-tightening type quick-mounted anti-explosion vacuum-pumping device provided by the invention has the advantages that when the liquefied natural gas bottles are vacuumed, the liquefied natural gas bottles are rapidly connected and have the functions of anti-explosion and self-tightening and self-sealing and the effects that the operating processes are reduced, and the labor efficiency is improved. The self-tightening type quick-mounted anti-explosion vacuum-pumping device is also suitable for other low temperature insulating gas bottles, such as liquid nitrogen and liquid oxygen gas bottles.

Description

technical field [0001] The invention belongs to the technical field of vacuuming low-temperature adiabatic pressure vessels, and in particular relates to a self-tightening quick-installation explosion-proof vacuuming device and a vacuuming device for liquefied natural gas cylinders for automobiles. Background technique [0002] At present, domestic liquefied natural gas cylinders must meet the interlayer vacuum degree specified in the standard to ensure the insulation effect of liquefied natural gas cylinders and ensure the safety of the cylinders. In order to achieve the interlayer vacuum specified by the national standard, a certain device must be used to evacuate the interlayer of the cryogenic gas cylinder, and the device can ensure that the vacuum degree will not be lost for a long time, so the sealing of the device after the vacuum is completed Sex is demanding. The vacuum device commonly used in China is mainly the vacuum unit connected to the rod valve, which is pul...

AI Technical Summary

Problems solved by technology

This device has the following disadvantages: 1. The operation reliability is poor, and the pull rod needs to be aligned with the threaded hole of the sealing plug and tightened before it can be pulled out and inserted.

2. The efficiency is low when a large amount of vacuuming is performed. When each cylinder is vacuumed, it is necessary to connect the rod valve to the vacuum port through a nut, pull out the rod and insert the sealing plug, and disassemble the nut. There are many operating procedures

3. After vacuuming, the vacuum degree is not up to standard, which is easy to cause rework

The tightness of the rod valve is very poor, and it is easy to leak when the sealing plug is inserted, resulting in a vacuum degree that is not up to standard

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