Ventilation isolation type safety valve box

Abstract

The invention discloses a ventilation isolation type safety valve box. The ventilation isolation type safety valve box comprises a valve; a sealing valve box body is arranged outside the valve; a hollow cavity is reserved between the sealing valve box body and the valve; a hand wheel is arranged on the valve and extends out of the sealing valve box body; double-wall connecting pipes are arranged on the two sides, corresponding to the valve, of the sealing valve box body and each comprise an outer connecting pipe body and an inner connecting pipe body; annular cavities are formed between the outer connecting pipe bodies and the inner connecting pipe bodies and communicate with the hollow cavity; the outer connecting pipe bodies are fixedly connected to the sealing valve box body; and the inner connecting pipe bodies are fixedly connected to the valve. According to the ventilation isolation type safety valve box, the installation problem of a valve of inner pipes of double-wall pipes canbe solved, the annual cavities of the double-wall pipes do not need to be disconnected at the position of the valve and are enabled to communicate with the hollow cavity in the valve, and therefore whether the valve leaks or not can be monitored synchronously, and meanwhile, the heat conduction of the valve can be reduced.

Description

technical field [0001] The invention belongs to the field of double-wall pipe connection application parts, and more specifically relates to a ventilation isolation type safety valve box. Background technique [0002] There are gas delivery pipelines in the fuel storage and supply system of the ship's gas main engine. At present, stainless steel pipes are generally used to transport the pipelines of this flammable gas level in the ventilation pipes. The first-layer pipeline (also known as double-wall pipe) transports the medium, and the two-layer pipeline monitors the pipeline through ventilation. [0003] Usually, a valve needs to be installed on the pipeline of the double-walled pipe to make the inner pipe conduct or stop. However, when setting the valve at present, the annular cavity between the inner pipe and the outer pipe needs to be closed before the double-walled pipe reaches the valve. If the outer pipe is extended and the inner pipe is connected to the interface ...

AI Technical Summary

Problems solved by technology

At present, stainless steel pipes are generally used to transport the pipelines of this flammable gas level in the ventilation pipes. The pipeline on the second floor (also known as double-wall pipe) transports the medium, and the monitoring of the pipeline is carried out by drawing air between the two-layer pipelines

[0003] Usually, a valve needs to be installed on the pipeline of the double-walled pipe to make the inner pipe conduct or stop. However, when setting the valve at present, the annular cavity between the inner pipe and the outer pipe needs to be closed before the double-walled pipe reaches the valve. Extend the outer pipe, and then connect the inner pipe to the interface of the valve, then firstly the purpose of heat insulation at the valve cannot be achieved, and secondly, it is not easy to monitor the leakage of the valve

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