CN220185255U

CN220185255U - Gas engine air inlet system

Info

Publication number: CN220185255U
Application number: CN202321786730.XU
Authority: CN
Inventors: 唐克远; 曾志龙; 黄永仲; 李伟
Original assignee: Guangxi Yuchai Marine and Genset Power Co Ltd
Current assignee: Guangxi Yuchai Marine and Genset Power Co Ltd
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2023-12-15
Anticipated expiration: 2033-07-07

Abstract

The utility model discloses an air inlet system of a gas engine, belongs to the field of air inlet of gas engines, and solves the problem that the existing air inlet pipe is used for mixing fresh air and fuel gas to cause potential safety hazards. Comprises a gas inlet system and a fresh air inlet system which are independently arranged; the gas inlet system comprises a gas shunt pipe and a plurality of gas branch pipes, each gas branch pipe is communicated with the gas shunt pipe, and each gas branch pipe is communicated with two cylinder cover air passages of the cylinder cover; the fresh air inlet system comprises an air main pipe and an air split pipe, wherein the air main pipe is communicated with the air split pipe, and a plurality of air inlets are formed in the air split pipe and are respectively communicated with a plurality of cylinder cover air passages of the cylinder cover in a one-to-one correspondence manner. The utility model can prevent the problem of explosion of the air inlet pipe caused by pressure sudden increase in the air inlet pipe.

Description

Gas engine air inlet system

Technical Field

The utility model relates to the field of gas engine air intake, in particular to a gas engine air intake system.

Background

The existing gas engine air inlet system generally adopts the mixing treatment in the air inlet pipe, and the gas and the air are mixed in the air inlet pipe and then enter the engine combustion chamber for combustion. However, when the backfire problem exists in the engine, the mixed fuel gas in the air inlet pipe is easy to cause the rapid combustion of the mixer in the air inlet pipe, so that the pressure is rapidly increased, the pressure in the air inlet pipe is further caused to be suddenly increased, the air inlet pipe is burst, and the potential safety hazard exists. Therefore, there is a need to design a gas engine air intake system.

Disclosure of Invention

The utility model aims to solve the technical problems in the prior art, and aims to provide an air inlet system of a gas engine, which adopts a double-channel air inlet mode to prevent the problem of explosion of an air inlet pipe caused by pressure surge in the air inlet pipe and improve the safety performance.

In order to achieve the above object, the present utility model provides a gas engine air intake system including a gas intake system and a fresh air intake system that are independently provided; the gas inlet system comprises a gas shunt pipe and a plurality of gas branch pipes, each gas branch pipe is communicated with the gas shunt pipe, and each gas branch pipe is communicated with two cylinder cover air passages of the cylinder cover; the fresh air inlet system comprises an air main pipe and an air split pipe, wherein the air main pipe is communicated with the air split pipe, and a plurality of air inlets are formed in the air split pipe and are respectively communicated with a plurality of cylinder cover air passages of the cylinder cover in a one-to-one correspondence manner.

As a further improvement, the air manifold is composed of a plurality of pipelines which are arranged in a split mode, a corrugated pipe is arranged between two adjacent pipelines, two ends of the corrugated pipe are connected with the pipelines through flanges, and sealing rings are arranged between the flanges.

Further, the gas shunt tubes constitute by a plurality of split type pipelines that set up, be equipped with the bellows between two adjacent pipelines, all pass through flange joint between the both ends of bellows and the pipeline, and be equipped with the sealing washer between the flange.

Further, each pipeline corresponding to the gas shunt pipe is connected with the cylinder cover through two gas branch pipes, the pipelines are connected with the gas branch pipes and the cylinder cover through flanges, and sealing rings are arranged between the flanges.

Further, the air shunt tubes constitute by a plurality of split type pipelines that set up, pass through flange joint between two adjacent pipelines, and be equipped with the sealing washer between the flange.

Further, the air inlet direction of the gas branch pipe is eccentrically arranged relative to the center of the air diversion pipe, the air flow direction of the cylinder cover air flue is eccentrically arranged relative to the center of the air diversion pipe, and the inner cavity of the joint between the gas branch pipe and the cylinder cover is of an arc-shaped structure.

Further, the gas shunt tubes be bilayer structure, including inner tube and outer tube, the outer tube cladding in order to form sealed collecting chamber between the two in the outer periphery of tube, the gas branch tube run through the outer tube and with the inner tube intercommunication, the outer tube on be equipped with the drainage tube with collecting chamber intercommunication, the end of drainage tube extends to the exit end of engine exhaust emission pipe.

Further, a gas sensor is arranged in the collecting cavity.

Advantageous effects

Compared with the prior art, the utility model has the advantages that:

1. according to the utility model, the fresh air and the fuel gas are respectively and independently conveyed in a double-channel air inlet mode, so that the fresh air and the fuel gas are mixed in the cylinder cover air flue, the mixed gas directly enters the engine combustion chamber for combustion, the mixed gas is more close to the engine combustion chamber, the problem of explosion of the air inlet pipe caused by sudden pressure increase in the air inlet pipe is prevented, and the safety performance is improved.

2. According to the utility model, the gas shunt tube adopts a double-layer structure design, the inner tube is used for conveying gas, the collecting cavity between the inner tube and the outer tube can collect leaked gas under the condition that the inner tube cannot be effectively sealed or leakage exists, and then the leaked gas is forced to be introduced into a high-temperature exhaust position of an engine through the drainage tube to burn off, so that the safety problem caused by excessive ignition of the leaked gas in a cabin under the high-temperature condition is prevented, and the safety performance is further improved.

Drawings

FIG. 1 is a schematic diagram of a front view of the present utility model;

fig. 2 is a schematic side sectional structure of the present utility model.

Wherein: 1-gas shunt tubes, 2-gas branch tubes, 3-cylinder cover, 4-cylinder cover air passage, 5-air main pipe, 6-air shunt tubes, 7-corrugated pipe, 8-gas sensor, 11-inner tube, 12-outer tube and 13-collecting cavity.

Detailed Description

The utility model will be further described with reference to specific embodiments in the drawings.

Referring to fig. 1-2, a method for gas engine intake, the method comprising the steps of:

s1, fresh air is conveyed into the air manifold and conveyed into the air shunt pipe; meanwhile, the fuel gas is conveyed and enters through the fuel gas shunt pipe and is shunted into the fuel gas branch pipe, so that fresh air and fuel gas are respectively supplied by adopting independent channels;

s2, fresh air is split into the cylinder cover air flue through an air split pipe, and fuel gas is conveyed into the cylinder cover air flue through a fuel gas branch pipe, so that the fresh air and the fuel gas are mixed in the cylinder cover air flue;

and S3, conveying the mixed gas in the step S2 to a combustion chamber of the engine through a cylinder cover air passage for combustion, and completing air intake of the engine.

In step S1, while delivering the fuel gas, the fuel gas shunt tube collects the leaked fuel gas in real time and guides the leaked fuel gas to a high-temperature exhaust position of the engine for combustion, so as to prevent the safety problem caused by excessive ignition of the leaked fuel gas in the engine room under the high-temperature condition.

According to the utility model, the fresh air and the fuel gas are respectively and independently conveyed in a double-channel air inlet mode, so that the fresh air and the fuel gas are mixed in the cylinder cover air flue, the mixed gas directly enters the engine combustion chamber for combustion, the mixed gas is more close to the engine combustion chamber, the problem of explosion of the air inlet pipe caused by sudden pressure increase in the air inlet pipe is prevented, and the safety performance is improved.

The gas engine air inlet system comprises a gas inlet system and a fresh air inlet system which are independently arranged; the gas inlet system comprises a gas shunt tube 1 and a plurality of gas branch tubes 2, wherein each gas branch tube 2 is communicated with the gas shunt tube 1, each gas branch tube 2 is communicated with two cylinder cover air passages 4 of a cylinder cover 3, independent conveying of gas is realized, and the two cylinder cover air passages 4 are used for mixing and conveying the gas and fresh air, so that the air inflow is ensured to be enough; the fresh air inlet system comprises an air main pipe 5 and an air split pipe 6, wherein the air main pipe 5 is communicated with the air split pipe 6, a plurality of air inlets are formed in the air split pipe 6 and are respectively communicated with a plurality of cylinder cover air passages 4 of the cylinder cover 3 in a one-to-one correspondence manner, and fresh air is independently conveyed.

Preferably, the air manifold 5 is composed of a plurality of pipelines which are arranged in a split mode, a corrugated pipe 7 is arranged between two adjacent pipelines, two ends of the corrugated pipe 7 are connected with the pipelines through flanges, and sealing rings are arranged between the flanges, so that sealing performance is improved. Further, the gas shunt tube 1 is composed of a plurality of split type pipelines, a corrugated pipe 7 is arranged between two adjacent pipelines, two ends of the corrugated pipe 7 are connected with the pipelines through flanges, and sealing rings are arranged between the flanges, so that sealing performance is improved.

The air manifold 5 and the gas shunt tubes 1 in the embodiment all adopt structures of a plurality of sections of pipelines and the corrugated pipes 7, so that the sectional disassembly and assembly are convenient, the maintenance is very convenient, and meanwhile, the corrugated pipes can also play an anti-seismic role, thereby prolonging the service lives of the air manifold 5 and the gas shunt tubes 1.

Preferably, each pipeline corresponding to the gas shunt tube 1 is connected with the cylinder cover 3 through two gas branch pipes 2, the pipelines are connected with the gas branch pipes 2 and the cylinder cover 3 through flanges, and sealing rings are arranged between the flanges, so that the tightness is improved.

Preferably, the air shunt tube 6 is composed of a plurality of pipelines which are arranged in a split mode, two adjacent pipelines are connected through a flange, and a sealing ring is arranged between the flanges, so that the tightness is improved. The sectional type air shunt tubes 6 facilitate sectional disassembly, assembly and maintenance, and are quite convenient to maintain.

Preferably, the air inlet direction of the gas branch pipe 2 is eccentrically arranged relative to the center of the air shunt pipe 6, and the air flow direction of the cylinder cover air flue 4 is eccentrically arranged relative to the center of the air shunt pipe 6, so that the cylinder cover air flue 4 is effectively shortened, the time and the distance for mixing and conveying fresh air and gas are further shortened, the safety performance is further improved, and the inner cavity of the joint between the gas branch pipe 2 and the cylinder cover 3 is of an arc-shaped structure, so that the gas can be well transited into the cylinder cover air flue 4.

Preferably, the gas shunt tube 1 has a double-layer structure, and comprises an inner tube 11 and an outer tube 12, wherein the outer tube 12 is coated on the periphery of the inner tube 11 to form a sealed collecting cavity 13 therebetween, the gas shunt tube 2 penetrates the outer tube 12 and is communicated with the inner tube 11, a drainage tube (not shown in the figure) communicated with the collecting cavity 13 is arranged on the outer tube 12, the tail end of the drainage tube extends to the outlet end of an engine exhaust gas discharge tube, and high-temperature exhaust gas at the outlet end of the exhaust gas discharge tube is used for ignition combustion.

According to the utility model, the gas shunt tube adopts a double-layer structure design, the inner tube 11 is used for conveying gas, the collecting cavity 13 between the inner tube 11 and the outer tube 12 can collect leaked gas under the condition that the inner tube 11 cannot be effectively sealed or leakage exists, and then the leaked gas is forced to be introduced into a high-temperature exhaust position of an engine through the drainage tube to burn off, so that the safety problem caused by excessive ignition of the leaked gas in a cabin under the high-temperature condition is prevented, and the safety performance is further improved.

Preferably, a gas sensor 8 is further disposed in the collecting cavity 13, and is used for detecting whether the collecting cavity 13 has gas leakage, the gas sensor 8 is electrically connected with the engine control system, and once the gas sensor 8 detects that the gas leakage occurs, a signal can be fed back to the engine control system at a transient speed, so that a user can know the signal in time.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.

Claims

1. The gas engine air inlet system is characterized by comprising a gas inlet system and a fresh air inlet system which are independently arranged; the gas inlet system comprises a gas shunt pipe (1) and a plurality of gas branch pipes (2), wherein each gas branch pipe (2) is communicated with the gas shunt pipe (1), and each gas branch pipe (2) is communicated with two cylinder cover air passages (4) of the cylinder cover (3); the fresh air inlet system comprises an air main pipe (5) and an air split pipe (6), wherein the air main pipe (5) is communicated with the air split pipe (6), and a plurality of air inlets are formed in the air split pipe (6) and are respectively communicated with a plurality of cylinder cover air passages (4) of the cylinder cover (3) in a one-to-one correspondence mode.

2. The gas engine air inlet system according to claim 1, wherein the air manifold (5) is composed of a plurality of split pipes, a corrugated pipe (7) is arranged between two adjacent pipes, two ends of the corrugated pipe (7) are connected with the pipes through flanges, and sealing rings are arranged between the flanges.

3. The gas engine air intake system according to claim 1, wherein the gas shunt tube (1) is composed of a plurality of split-type pipelines, a corrugated tube (7) is arranged between two adjacent pipelines, two ends of the corrugated tube (7) are connected with the pipelines through flanges, and sealing rings are arranged between the flanges.

4. A gas engine air intake system according to claim 3, wherein each pipeline corresponding to the gas shunt tube (1) is connected with the cylinder cover (3) through two gas branch tubes (2), the pipelines are connected with the gas branch tubes (2) and the cylinder cover (3) through flanges, and sealing rings are arranged between the flanges.

5. A gas engine air intake system according to claim 1, wherein the air shunt tube (6) is formed by a plurality of split-type pipes, two adjacent pipes are connected by a flange, and a sealing ring is arranged between the flanges.

6. A gas engine air intake system according to claim 1, wherein the air intake direction of the gas branch pipe (2) is arranged eccentrically with respect to the center of the air branch pipe (6), the air flow direction of the cylinder head air passage (4) is arranged eccentrically with respect to the center of the air branch pipe (6), and the inner cavity at the junction between the gas branch pipe (2) and the cylinder head (3) is of an arc-shaped structure.

7. A gas engine intake system according to any one of claims 1-6, wherein the gas shunt tube (1) has a double-layer structure, and comprises an inner tube (11) and an outer tube (12), the outer tube (12) is wrapped around the inner tube (11) to form a sealed collecting cavity (13) therebetween, the gas shunt tube (2) penetrates the outer tube (12) and is communicated with the inner tube (11), a drainage tube communicated with the collecting cavity (13) is arranged on the outer tube (12), and the tail end of the drainage tube extends to the outlet end of the exhaust gas emission tube of the engine.

8. A gas engine intake system according to claim 7, wherein the collection chamber (13) is further provided with a gas sensor (8).