Antifreezing liquefied gas spraying device

Abstract

The invention discloses an antifreezing liquefied gas spraying device. The antifreezing liquefied gas spraying device comprises a gas inlet pipe and a hollow pipe. The upper end of the hollow pipe isprovided with a plurality of spraying holes. The spraying holes are correspondingly provided with electromagnetic valves. A groove is formed in the inner wall of the hollow pipe. The spraying holes are dead against the groove. The groove is internally provided with a plurality of electrical heating pipes side by side. The bottoms of the electrical heating pipes are provided with a guide block. Thebottom of the groove is provided with a guide groove coordinating with the guide block. Each electrical heating pipe comprises a pipe body, an insulating material filling the pipe body and a heatingwire arranged in the pipe body, wherein the tail end of the heating wire is connected with wiring terminals, the end, far away from the gas inlet pipe, of the groove is provided with small holes communicating with the outside, and the wiring terminals pass through the small holes and are connected with a wiring board. The open end of the groove is covered by a heat conduction plate. The lower portions of the pipe bodies of the electrical heating pipes are provided with the guide block which coordinates with the guide groove, and therefore the pipe bodies can be put more stably, the fastening of the electrical heating pipes can be achieved without additionally arranging a new fixing structure, and the purpose of optimizing the internal structure of a spray rail is achieved.

Description

technical field [0001] The invention relates to a gas injection rail, in particular to a liquefied gas injection device capable of preventing freezing. Background technique [0002] The gas injection rail is a necessary equipment on CNG-gasoline dual-fuel vehicles, but when the temperature is low, the low temperature causes the gas in the low-pressure pipeline to shrink, forming a negative pressure between the gas common rail and the filter, so that the gas injection rail opens It is not easy and affects the normal use of the gas system; we use water heating to heat the gas injection rail to make it work normally, but it is necessary to install a waterway, which increases pipeline interference, is prone to liquid leakage, and increases the difficulty of maintenance. Contents of the invention [0003] The object of the present invention is to provide a liquefied gas spraying device capable of preventing freezing, which ensures the normal passage of gas and avoids the occurr...

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Problems solved by technology

[0002] The gas injection rail is a necessary equipment on CNG-gasoline dual-fuel vehicles, but when the temperature is low, the low temperature causes the gas in the low-pressure pipeline to shrink, forming a negative pressure between the gas common rail and the filter, so that the gas injection rail opens It is not easy and affects the normal use of the gas system; we use water heating to heat the gas injection rail to make it work normally, but it is necessary to install a waterway, which increases pipeline interference, is prone to liquid leakage, and increases the difficulty of maintenance

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