Gas engine intake system

Abstract

The utility model discloses a gas engine intake system, which belongs to the field of engine intake technology, and solves the problem that the leaked combustible gas is directly discharged into the air, which is easy to cause fire, resulting in safety accidents and polluting the air environment. The gas engine intake system includes an intake manifold and a controller, wherein the intake manifold is provided with a gas cavity and a hollow closed cavity, wherein the gas cavity is opened inside the hollow closed cavity, an electronic throttle is provided on one side of the intake manifold, and a connecting pipe connected to the hollow closed cavity is provided on the other side of the intake manifold, and a gas pump is provided at the other end of the connecting pipe, and a discharge pipe is detachably provided at the output end of the gas pump, and a combustion pipe is provided at the other end of the discharge pipe, and a spark plug is provided in the combustion pipe. The utility model provides a gas engine intake system, which avoids the combustible gas from being directly discharged into the air to cause a fire, and reduces the pollution to the air environment.

Description

Technical Field

[0001] The utility model relates to the technical field of engine air intake, and more specifically, to an air intake system for a gas engine. Background Art

[0002] The engine air intake system delivers clean, dry, sufficient and stable gas to the engine to meet the engine's requirements and prevent impurities and large dust particles in the air from entering the engine's combustion chamber and causing engine wear.

[0003] At present, the air intake system of the engine is usually a double-layer structure, which can effectively prevent gas leakage. For example, the patent number is: CN202210727655.3 A gas engine intake pipe protection device, including an air intake pipe, a gas intake pipe and a gas injection valve, the air intake pipe is provided with a plurality of groups of air pipes and intake manifolds for providing mixed gas to each cylinder of the engine, the lower end of the air intake pipe is evenly distributed with a plurality of guide pipes, the lower end of the guide pipe is provided with an injection valve guard, the gas injection valve is located in the injection valve guard, the lower end of the guide pipe is connected to the outlet of the gas injection valve, the inlet end of the gas injection valve is connected to the gas intake pipe, one end of the gas intake pipe is respectively provided with a gas inlet and a purge gas outlet, and the two adjacent injection valve guards are connected through the purge gas pipe I.

[0004] However, the patent number is: CN202210727655.3 A gas engine intake pipe protection device discharges the leaked combustible gas by purging, but does not have a reasonable treatment plan for the leaked combustible gas. The discharged combustible gas is prone to cause fire and endanger personal safety, and the directly discharged combustible gas pollutes the air environment. Therefore, it is urgent to develop and design a leakage protection device for the gas engine intake system. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gas engine intake system in view of the above-mentioned deficiencies in the prior art, which can fully burn the leaked combustible gas to avoid direct discharge into the air to cause fire and safety accidents, while reducing pollution to the air environment.

[0006] The technical solution of the utility model is as follows: a gas engine intake system, including an intake manifold and a controller, a gas cavity and a hollow closed cavity are provided in the intake manifold, the gas cavity is opened on the inner side of the hollow closed cavity, an electronic throttle is provided on one side of the intake manifold, a connecting pipe connected to the hollow closed cavity is provided on the other side of the intake manifold, a gas pump is provided on the other end of the connecting pipe, a discharge pipe is detachably provided on the output end of the gas pump, a combustion pipe is provided on the other end of the discharge pipe, a spark plug is provided in the combustion pipe, the spark plug is electrically connected to a spark plug controller, a sensor for detecting gas concentration is provided in the hollow closed cavity, and the sensor is electrically connected to the gas pump, the electronic throttle and the spark plug controller through the controller.

[0007] Furthermore, the sensor is a gas concentration sensor.

[0008] Furthermore, the diameter of the combustion tube gradually increases from an end close to the discharge tube to an end far away from the discharge tube.

[0009] Furthermore, the connecting pipe and the discharge pipe are both connected to the gas pump via flanges.

[0010] Furthermore, the gas engine air intake system also includes a metal mesh, and the metal mesh is detachably installed in the exhaust pipe.

[0011] Furthermore, a sink groove is provided at one end of the discharge pipe close to the combustion pipe, the metal mesh is installed at the bottom of the sink groove, an internal thread is provided on the inner wall of the sink groove, an intermediate pipe is provided at one end of the discharge pipe close to the combustion pipe and threadedly connected to the internal thread, the other end of the intermediate pipe is threadedly connected to the combustion pipe, and one end of the intermediate pipe presses the metal mesh to the bottom of the sink groove.

[0012] Furthermore, the porosity of the metal mesh is 65%-90%.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model provides a gas engine air intake system, which adds a hollow closed cavity on the outside of the gas cavity, so as to prevent the escaping of the combustible gas leaking from the gas cavity, and at the same time opens the electronic throttle to allow the gas in the hollow closed cavity to circulate, so as to facilitate the gas pump to extract the combustible gas and mix the combustible gas with air to reach a flammable ratio, so that the combustible gas can be fully burned in the combustion tube, thereby reducing the pollution to the air environment, and at the same time preventing the combustible gas from burning after being discharged, causing a safety accident.

[0016] 2. The utility model provides a gas engine air intake system, in which a metal mesh is arranged in the discharge pipe, which can buffer and divert the mixed gas ejected from the output end of the gas pump, thereby avoiding the phenomenon of incomplete combustion of the mixed gas and the phenomenon of backfire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the discharge pipe and the intermediate pipe in the utility model;

[0019] Figure 3 It is an enlarged schematic diagram of the cross-sectional structure of the discharge pipe in the utility model.

[0020] Among them: 1-gas chamber, 2-hollow closed cavity, 3-gas pump, 4-controller, 5-connecting pipe, 6-emission pipe, 7-electronic throttle, 8-combustion pipe, 9-spark plug, 10-filter, 11-sink, 12-intake manifold, 13-spark plug controller, 14-sensor, 15-intermediate pipe. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0022] See also Figure 1-3 A gas engine intake system includes an intake manifold 12 and a controller 4. A gas chamber 1 and a hollow closed cavity 2 are provided in the intake manifold 12. The gas chamber 1 is opened inside the hollow closed cavity 2. An electronic throttle 7 is provided on one side of the intake manifold 12. A connecting pipe 5 connected to the hollow closed cavity 2 is provided on the other side of the intake manifold 12. A gas pump 3 is provided on the other end of the connecting pipe 5. An exhaust pipe 6 is detachably provided at the output end of the gas pump 3. A combustion pipe 8 is provided on the other end of the exhaust pipe 6. A spark plug 9 is provided in the combustion pipe 8. The spark plug 9 is electrically connected to a spark plug controller 13. A sensor 14 for detecting gas concentration is provided in the hollow closed cavity 2. The sensor 14 is electrically connected to the gas pump 3, the electronic throttle 7, and the spark plug controller 13 through the controller 4; when a leak occurs in the gas chamber 1, the sensor 14 detects a gas leak in the hollow closed chamber 2, and feeds back a signal to the controller 4, then the electronic throttle 7 opens, and the gas pump 3 starts, and the combustible mixed gas in the hollow closed chamber 2 is extracted, and then passes through the exhaust pipe 6 to the combustion pipe 8, and then the controller 4 controls the spark plug 9 to ignite through the spark plug controller 13, and ignites the combustible mixed gas in the hollow closed chamber 2, thereby minimizing pollution to the air environment and avoiding being discharged into the air and ignited, causing a safety accident.

[0023] In this embodiment, the sensor 14 is a gas concentration sensor. When the sensor 14 detects gas leakage in the hollow closed cavity 2, the electronic throttle 7 opens and the gas pump 3 starts to extract the gas in the hollow closed cavity 2.

[0024] In this embodiment, a combustion tube 8 is provided at the other end of the exhaust pipe 6. The diameter of the combustion tube 8 gradually increases from the end close to the exhaust pipe 6 to the end away from the exhaust pipe 6, and the opening of the combustion tube 8 faces upward. A spark plug 9 is provided in the combustion tube 8. The spark plug 9 is electrically connected to the sensor 14 through the controller 4, and the controller 4 controls the spark plug 9 through the spark plug controller 13; when the gas pump 3 draws out the combustible mixture in the hollow closed cavity 2 and then passes it to the combustion tube 8 through the exhaust pipe 6, the controller 4 then controls the spark plug 9 to ignite through the spark plug controller 13, thereby igniting the combustible mixture in the hollow closed cavity 2.

[0025] In this embodiment, the connecting pipe 5 and the discharge pipe 6 are connected to the gas pump 3 through flanges, which is convenient for disassembly and installation of the connecting pipe 5, the gas pump 3 and the discharge pipe 6, and is also convenient for repair and maintenance of the gas pump 3; sealing gaskets are provided between the connecting pipe 5 and the gas pump 3, and between the discharge pipe 6 and the gas pump 3 to further improve their sealing properties.

[0026] In this embodiment, the gas engine intake system also includes a metal mesh 10, which is detachably installed in the exhaust pipe 6 and can buffer and divert the mixed gas ejected from the output end of the gas pump 3, thereby avoiding incomplete combustion of the mixed gas and backfire.

[0027] In this embodiment, a trough 11 is provided at one end of the discharge pipe 6 close to the combustion pipe 8, and a metal mesh 10 is installed at the bottom of the trough 11. An internal thread is provided on the inner wall of the trough 11. An intermediate pipe 15 is threadedly connected to the internal thread at one end of the discharge pipe 6 close to the combustion pipe 8, and the other end of the intermediate pipe 15 is threadedly connected to the combustion pipe 8, and the diameter of the intermediate pipe 15 is adapted to the diameter of the trough 11; one end of the intermediate pipe 15 presses the metal mesh 10 against the bottom of the trough 11, and thread glue can be added to the external threads at both ends of the intermediate pipe 15 to further strengthen the threaded connection between the intermediate pipe 15 and the discharge pipe 6 and the combustion pipe 8; through the threaded connection between the discharge pipe 6 and the intermediate pipe 15, one end of the intermediate pipe 15 is in contact with the metal mesh 10 and squeezes the metal mesh 10, thereby achieving the purpose of installing the metal mesh 10 at the bottom of the trough 11, and at the same time, the threaded connection between the intermediate pipe 15 and the discharge pipe 6 is convenient for disassembly, and convenient for replacement and cleaning of the metal mesh 10.

[0028] In this embodiment, the porosity of the metal mesh 10 is 65%-90%, and the diameter of the metal wire constituting the metal mesh 10 is 0.3mm-0.5mm, which can buffer and divert the mixed gas ejected from the output end of the gas pump 3, thereby avoiding incomplete combustion of the mixed gas and flashback.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A gas engine intake system, characterized in that: The invention comprises an intake manifold (12) and a controller (4), wherein the intake manifold (12) is provided with a gas chamber (1) and a hollow closed chamber (2), wherein the gas chamber (1) is opened inside the hollow closed chamber (2), an electronic throttle valve (7) is provided on one side of the intake manifold (12), and a connecting pipe (5) connected to the hollow closed chamber (2) is provided on the other side of the intake manifold (12), and a gas pump (3) is provided at the other end of the connecting pipe (5), and the gas pump (3) is connected to the hollow closed chamber (2). ) is detachably provided with an exhaust pipe (6) at the output end thereof, a combustion pipe (8) is provided at the other end thereof, a spark plug (9) is provided in the combustion pipe (8), the spark plug (9) is electrically connected to a spark plug controller (13), a sensor (14) for detecting the gas concentration is provided in the hollow closed cavity (2), the sensor (14) is electrically connected to the gas pump (3), the electronic throttle (7), and the spark plug controller (13) through a controller (4).

2. A gas engine intake system according to claim 1, characterized in that: The sensor (14) is a gas concentration sensor.

3. A gas engine intake system according to claim 2, characterized in that: The diameter of the combustion tube (8) gradually increases from an end close to the discharge tube (6) to an end far away from the discharge tube (6).

4. A gas engine intake system according to claim 1, characterized in that: The connecting pipe (5) and the discharge pipe (6) are both connected to the gas pump (3) via flanges.

5. A gas engine intake system according to any one of claims 1 to 4, characterized in that: The gas engine air intake system further comprises a metal mesh (10), and the metal mesh (10) is detachably installed in the exhaust pipe (6).

6. A gas engine air intake system according to claim 5, characterized in that: The end of the discharge pipe (6) close to the combustion pipe (8) is provided with a trough (11), the metal mesh (10) is installed at the bottom of the trough (11), the inner wall of the trough (11) is provided with an internal thread, the end of the discharge pipe (6) close to the combustion pipe (8) is provided with an intermediate pipe (15) threadedly connected to the internal thread, the other end of the intermediate pipe (15) is threadedly connected to the combustion pipe (8), and one end of the intermediate pipe (15) presses the metal mesh (10) against the bottom of the trough (11).

7. A gas engine intake system according to claim 5, characterized in that: The porosity of the metal mesh (10) is 65%-90%.

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