CN217632687U - Safety starting system for gas fuel engine - Google Patents

Abstract

The utility model discloses a gaseous fuel engine safety starting system relates to engine control technical field, solves the technical problem that can not in time get rid of remaining gaseous fuel after gaseous fuel engine starts the failure, improves the automatic level of engine safe operation. The system includes the engine, a controller, turbo charger, still include the gas pipeline, the pipeline of admitting air, the tail gas pipeline, the scavenging pipeline, the gas pipeline includes the gas pipe, the gas pipe has connected gradually manual stop valve, the main fuel valve, a filter, the air-vent valve, the injection valves, the pipeline of admitting air includes the intake pipe, the intake pipe is equipped with air cleaner, the tail gas pipeline includes the tail gas pipe, the tail gas pipe is equipped with explosion-proof valve, the extinction spark muffler, the air inlet manifold of engine is connected with the blender, the injection valves is connected respectively to the blender, the compressor, the input of turbine is connected to the blast pipe of engine, the scavenging pipeline is including the compressed gas pipe of connecting compressed gas source, the compressed gas pipe is equipped with the scavenging valve, the compressed gas pipe is connected the blast pipe.

Description

Safety starting system for gas fuel engine

Technical Field

The utility model relates to an engine control technical field, more specifically says that it relates to a gaseous fuel engine safety starting system.

Background

With the implementation of the "double carbon" strategy and the increasing pressure on environmental protection, the low-carbon and environmental-friendly clean energy power is receiving increasing attention from the industry. Green low-carbon fuels represented by natural gas and hydrogen, biomass fuels represented by methane and landfill gas, and industrial tail gas fuels represented by gas, coke oven tail gas and semi-coke tail gas gradually become a new favorite of clean energy power.

However, the gas fuel is easy to leak and diffuse, and has high flammable and explosive risks, so that safe operation is important. When gas fuel leaks, the potential safety hazard of entering a closed space is very large, if the gas fuel is started in a heat engine state, the phenomenon of blasting can be caused, and the gas fuel has great harm to a tail gas pipeline and accessory equipment. When the engine is failed to start, residual gas fuel in the engine and the tail gas pipeline is not discharged in time, and the potential safety hazard is increased. In addition, in the prior art, safety check before starting the engine has high requirements on personnel, and the consequences caused when negligence endangers the health of the personnel occurs can be serious.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, the utility model aims at providing a can improve the gas fuel engine safety starting system of security.

The technical scheme of the utility model is that: the gas pipeline comprises a gas pipe, the gas pipe is sequentially connected with a manual stop valve, a main fuel valve, a filter, a pressure regulating valve and an injection valve group, the gas pipe comprises an air inlet pipe connected with a gas compressor of the turbocharger, an air filter is arranged at the inlet end of the air inlet pipe, the tail gas pipe comprises a tail gas pipe connected with a turbine of the turbocharger, an explosion-proof valve and a spark-extinguishing silencer are arranged at the outlet end of the tail gas pipe, an input end of an air inlet main pipe of the engine is connected with a mixer, the mixer is respectively connected with an output end of the injection valve group and an output end of the gas compressor, an output end of an exhaust pipe of the engine is connected with an input end of the turbine, the scavenging pipe comprises a compression gas pipe connected with a compression gas source, the compression gas pipe is provided with a scavenging valve, the compression gas pipe is connected with one end of the exhaust pipe far away from the turbine, and the controller is electrically connected with the engine, the main fuel valve, the injection valve group and the scavenging valve.

As a further improvement, a gas pipe between the filter and the pressure regulating valve is provided with a stop valve, a gas pipe between the filter and the stop valve is provided with a bleeding pipe, the bleeding pipe is provided with a bleeding valve, and the controller is electrically connected with the stop valve and the bleeding valve.

Further, the main fuel valve and the shut-off valve are normally closed control valves, and the purge valve is a normally open control valve.

Further, the gas pipe is provided with a pressure sensor which is electrically connected with the controller.

Furtherly, still include interlocking gear, interlocking gear includes barring handle, hollow structure's mount pad, the top of mount pad is equipped with the vertical installation cover of arranging, the activity of barring handle inserts in the installation cover, just the lower extreme of barring handle extends to in the mount pad, be equipped with the detection in the mount pad the travel switch of barring handle lower extreme, controller electric connection travel switch.

Furthermore, the engine is provided with an auxiliary oil pump, and the controller is electrically connected with the auxiliary oil pump.

Further, the engine is provided with an electric starting motor, and the controller is electrically connected with the electric starting motor.

Advantageous effects

Compared with the prior art, the utility model, the advantage that has does:

the utility model has high safety, and the utility model effectively avoids the leakage of combustible gas to the engine position for the engine which adopts combustible and explosive gas fuel and is easy to leak and diffuse, and ensures the safe diffusion and evacuation of residual gas in the engine position; the scavenging pipeline can sweep the exhaust pipe of the engine, so that blasting in the starting process is avoided, the exhaust pipeline and accessory equipment are protected, and potential safety hazards of open fire to the engine can be prevented; the association of the start linkage avoids casualties and equipment damage caused by the turning handle rotating along with the engine.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic structural diagram of the middle interlocking mechanism of the present invention.

Wherein: 1-engine, 2-turbocharger, 3-gas pipeline, 4-air inlet pipeline, 5-tail gas pipeline, 6-scavenging pipeline, 7-gas pipe, 8-manual stop valve, 9-main fuel valve, 10-filter, 11-pressure regulating valve, 12-injection valve group, 13-compressor, 14-air inlet pipe, 15-air filter, 16-turbine, 17-tail gas pipe, 18-explosion-proof valve, 19-spark-extinguishing silencer, 20-air inlet main pipe, 21-mixer, 22-exhaust pipe, 23-compressed air pipe, 24-scavenging valve, 25-cut-off valve, 26-bleeding pipe, 27-bleeding valve, 28-pressure sensor, 29-turning handle, 30-mounting seat, 31-mounting sleeve and 32-travel switch.

Detailed Description

The invention will be further described with reference to specific embodiments shown in the drawings.

Referring to fig. 1 and 2, the safe starting system for the gas fuel engine comprises an engine 1, a controller, a turbocharger 2, a gas pipeline 3, an air inlet pipeline 4, a tail gas pipeline 5 and a scavenging pipeline 6. The gas pipeline 3 comprises a gas pipe 7, and the gas pipe 7 is sequentially connected with a manual stop valve 8, a main fuel valve 9, a filter 10, a pressure regulating valve 11 and an injection valve group 12 from an input end to an output end. The intake line 4 includes an intake pipe 14 connected to a compressor 13 of the turbocharger 2, and an inlet end of the intake pipe 14 is provided with an air cleaner 15. The tail gas pipeline 5 comprises a tail gas pipe 17 connected with a turbine 16 of the turbocharger 2, an explosion-proof valve 18 and a spark-extinguishing silencer 19 are arranged at the outlet end of the tail gas pipe 17, pressure can be timely released when after-combustion blasting occurs, and damage to an engine, a peripheral exhaust pipeline and accessory equipment is avoided. The input end of an air inlet main pipe 20 of the engine 1 is connected with a mixer 21, the mixer is respectively connected with the output end of the injection valve group 12 and the output end of the compressor 13, and the output end of an exhaust pipe 22 of the engine 1 is connected with the input end of the turbine 16. The scavenging pipeline 6 comprises a compressed air pipe 23 connected with a compressed air source, the compressed air source is an air compressor or a compressed air tank, the compressed air pipe 23 is provided with a scavenging valve 24, the compressed air pipe 23 is connected with one end of the exhaust pipe 22 far away from the turbine 16, the exhaust pipe 22 can be purged by using the compressed air, and unburned combustible gas is removed. The controller is electrically connected with the engine 1, the main fuel valve 9, the injection valve group 12 and the scavenging valve 24.

The gas pipe 7 between the filter 10 and the pressure regulating valve 11 is provided with a stop valve 25, the gas pipe 7 between the filter 10 and the stop valve 25 is provided with a bleeding pipe 26, the bleeding pipe 26 is provided with a bleeding valve 27, and the controller is electrically connected with the stop valve 25 and the bleeding valve 27. The main fuel valve 9 and the shut-off valve 25 are normally closed control valves, the bleeding valve 27 is a normally open control valve, and the gas pipe 7 is provided with a pressure sensor 28 electrically connected to a controller. The gas pipeline 3 is used for gas clean supply, safe cut-off, diffusion and pressure monitoring. The main fuel valve 9 is in a closed state in the shutdown state, the main fuel valve 9 is located outside the cabin bulkhead, the bleed valve 27 is in an open state in the shutdown state, and the shut-off valve 25 is in a closed state in the shutdown state. The combination of the bleeding valve 27, the main fuel valve 9 and the shut-off valve 25 ensures that the combustible gas can not enter the engine compartment under the shutdown state, and the residual fuel gas in the pipeline can be safely bled, thereby ensuring the safety of the engine compartment.

Similarly, when the engine 1 is located in a power plant, a box plant, the main fuel valve 9 is located outside the power plant or box plant box package.

This system still includes interlocking gear, and interlocking gear includes barring handle 29, hollow structure's mount pad 30, and the top of mount pad 30 is equipped with the vertical installation cover 31 of arranging, and in barring handle 29 activity inserted installation cover 31, and in the lower extreme of barring handle 29 extended to mount pad 30, was equipped with travel switch 32, controller electric connection travel switch 32 of detecting barring handle 29 lower extreme in the mount pad 30. The barring handle 29 is used for manually barring an engine before starting, the mounting base 30 is matched with the barring handle 29 for use, the mounting base 30 is mounted in an engine cabin, the mounting sleeve 31 can prevent tools such as non-barring handles from entering to cause misjudgment, the travel switch 32 is arranged at the bottom of the mounting base 30, the travel switch 32 is closed by the self weight of the barring handle 29, a starting interlocking signal is transmitted to the starting controller, and the engine is allowed to start. The interlocking mechanism can effectively prevent casualties and equipment damage caused by starting the engine under the condition that the barring handle 29 is not separated from the engine.

The engine 1 is provided with an auxiliary oil pump, and the controller is electrically connected with the auxiliary oil pump and used for supplying engine oil before the engine is started or in a stop state, and can be controlled in a manual mode and an automatic mode.

The engine 1 is provided with an electric starting motor, and the controller is electrically connected with the electric starting motor and used for carrying out auxiliary starting on the engine.

The above is only a preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility of the invention and the utility of the patent.

Claims (5)

1. The safe starting system of the gas fuel engine comprises an engine (1), a controller and a turbocharger (2), and is characterized by further comprising a gas pipeline (3), an air inlet pipeline (4), a tail gas pipeline (5) and a scavenging pipeline (6), wherein the gas pipeline (3) comprises a gas pipe (7), the gas pipe (7) is sequentially connected with a manual stop valve (8), a main fuel valve (9), a filter (10), a pressure regulating valve (11) and an injection valve group (12), the air inlet pipeline (4) comprises an air inlet pipe (14) connected with a gas compressor (13) of the turbocharger (2), an air filter (15) is arranged at the inlet end of the air inlet pipe (14), the tail gas pipeline (5) comprises a tail gas pipe (17) connected with a turbine (16) of the turbocharger (2), the outlet end of the tail gas pipe (17) is provided with an explosion-proof valve (18) and a spark-extinguishing silencer (19), the input end of an air inlet main pipe (20) of the engine (1) is connected with a mixer (21), the mixer is respectively connected with the output end of the injection valve group (12) and the output end of the gas compressor (13), and the exhaust pipe (22) of the engine is connected with the input end of the engine, the scavenging pipeline (6) is including connecting compressed air source's compressed air pipe (23), compressed air pipe (23) are equipped with scavenging valve (24), compressed air pipe (23) are connected blast pipe (22) are kept away from the one end of turbine (16), controller electric connection engine (1), main fuel valve (9), injection valves (12), scavenging valve (24).

2. A gas-fueled engine safe starting system according to claim 1, wherein a shut-off valve (25) is provided to a gas pipe (7) between the filter (10) and the pressure regulating valve (11), a blow-off pipe (26) is provided to the gas pipe (7) between the filter (10) and the shut-off valve (25), a blow-off valve (27) is provided to the blow-off pipe (26), and the controller is electrically connected to the shut-off valve (25) and the blow-off valve (27).

3. A gaseous fuelled engine safety starting system according to claim 1, wherein the gas tube (7) is provided with a pressure sensor (28) electrically connected to the controller.

4. The safe starting system of the gaseous fuel engine according to claim 1, characterized by further comprising an interlocking mechanism, wherein the interlocking mechanism comprises a turning handle (29) and a mounting seat (30) with a hollow structure, a vertically arranged mounting sleeve (31) is arranged at the top of the mounting seat (30), the turning handle (29) is movably inserted into the mounting sleeve (31), the lower end of the turning handle (29) extends into the mounting seat (30), a travel switch (32) for detecting the lower end of the turning handle (29) is arranged in the mounting seat (30), and the controller is electrically connected with the travel switch (32).

5. A gaseous fuelled engine safety start system according to claim 1, wherein the engine (1) is provided with an auxiliary oil pump, the controller being electrically connected to the auxiliary oil pump.

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