Low-pressure gas engine gas supply valve module

Abstract

The invention discloses a low-pressure gas engine gas supply valve module. The low-pressure gas engine gas supply valve module comprises a manual gas stop valve, a gas filter, a gas electromagnetic stop valve, a first pressure detection device, a flame arrester, a pressure regulating valve, a gas inlet connecting pipe and a second pressure detection device, wherein an inlet of the manual gas stopvalve serves as a gas inlet, the gas filter is connected with an outlet of the manual gas stop valve, one end of the gas electromagnetic stop valve is connected with the gas filter through a connecting pipe, the first pressure detection device is arranged on the connecting pipe, the front end of the fire arrester is connected with the other end of the gas electromagnetic stop valve, the front endof the pressure regulating valve is arranged to be connected with the rear end of the flame arrester, the gas inlet connecting pipe is connected with the rear end of the pressure regulating valve, andthe second pressure detection device is arranged on the gas inlet connecting pipe. The low-pressure gas engine gas supply valve module is complete in function, reasonable in price, wide in application range and capable of completely meeting the gas supply requirements of a gas engine.

Description

technical field [0001] The invention relates to the field of engines, in particular to an air supply valve assembly for a low-pressure gas engine. Background technique [0002] Low-pressure gas engines are generally used in industries where the gas source is natural gas, biogas, gas, etc., such as generator stations, petrochemical and aquaculture industries. They are basically four-stroke engines. Due to the relatively low gas pressure, the booster equipment is expensive and the pressure is increased. Increased requirements for pipelines and components will also lead to increased costs. Generally, the single-point injection after supercharging or direct injection in the cylinder that requires higher gas pressure is not used, and the pre-mixed intake air solution before supercharging is generally used. [0003] For low-pressure gas engines, generally medium and large low-pressure gas engines generally use imported systems due to the high cost and selling price of the whole ma...

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Problems solved by technology

[0002] Low-pressure gas engines are generally used in industries where the gas source is natural gas, biogas, gas, etc., such as generator stations, petrochemical and aquaculture industries. They are basically four-stroke engines. Due to the relatively low gas pressure, the booster equipment is expensive and the pressure is increased. Increased requirements for pipelines and components will also lead to increased costs. Generally, the single-point injection after supercharging or direct injection in the cylinder that requires higher gas pressure is not used, and the pre-mixed intake air solution before supercharging is generally used.

[0003] For low-pressure gas engines, generally medium and large low-pressure gas engines generally use imported systems due to the high cost and selling price of the whole machine. The system is relatively mature and reliable, but the cost of parts is expensive and the after-sales service period is long.

Domestic engine manufacturers or generator set manufacturers are also beginning to develop low-pressure gas engines. The gas system configuration of small and medium-sized engines currently on the market has the following disadvantages: 1. The general configuration function is simple: many gas supply systems have no valve components, only pressure regulating valves, Some only have filters and pressure regulating valves, and there are hidden dangers in terms of simple system functions and reliability; 2. For small and medium-sized engines, the general gas supply system components are threaded, which is inconvenient to install and difficult to guarantee the relative positions of different parts. It is convenient for disassembly and maintenance, and there is a hidden danger of air leakage

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