CN108825409B - Fuel supply system of gas engine - Google Patents
Fuel supply system of gas engine Download PDFInfo
- Publication number
- CN108825409B CN108825409B CN201810418845.0A CN201810418845A CN108825409B CN 108825409 B CN108825409 B CN 108825409B CN 201810418845 A CN201810418845 A CN 201810418845A CN 108825409 B CN108825409 B CN 108825409B
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- Prior art keywords
- gas
- pipeline
- engine
- air
- supply system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0293—Safety devices; Fail-safe measures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a fuel supply system of a gas engine, which comprises a gas valve unit and a pipeline connecting the gas valve unit and the engine, wherein the pipeline comprises an inner pipe and an outer pipe which are nested with each other, a gas channel is arranged in the inner pipe, an air channel is arranged between the inner pipe and the outer pipe, each gas channel is communicated with a gas output port of the gas valve unit and a gas input port of the engine, two ends of each air channel are respectively communicated with the gas valve unit and the outside air, and an exhaust fan for extracting the gas in a sealed box is also arranged, in the process of gas delivery, the exhaust fan ensures that the gas in the air channel is always in a circulating state by extracting the air in the sealed box, even if the gas leakage occurs in a gas distribution pipeline in the gas valve unit or the gas channel in a double-layer sleeve, the leaked gas can be rapidly exhausted by the exhaust fan through the air channel, thereby improving the safety performance, the invention is used in the field of engines.
Description
Technical Field
The invention relates to the field of engines, in particular to a fuel supply system of a gas engine.
Background
The engine gas supply is mainly to mix natural gas and air through a gas valve unit and then to transmit the mixed gas to the engine through a pipeline.
The gas valve unit, the engine and the pipeline are generally arranged in a closed space, so that in the process of gas delivery, if gas leaks, the gas can be accumulated in the closed space, when the concentration of the leaked gas is higher, explosion can be caused, and great potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a fuel supply system of a gas engine, which has a simple structure and high safety performance.
The technical scheme adopted by the invention is as follows:
the fuel supply system of the gas engine comprises a gas valve unit for allocating gas and a pipeline for connecting the gas valve unit and the engine, wherein the gas valve unit comprises a seal box with an inner cavity and a gas distribution pipeline arranged in the seal box, the gas distribution pipeline is provided with a natural gas inlet, an air inlet and a plurality of gas output ports which are communicated with the outside, the pipeline is a plurality of double-layer sleeves, each double-layer sleeve comprises an inner pipe and an outer pipe which are mutually nested, a gas channel is arranged in the inner pipe, an air channel is arranged between the inner pipe and the outer pipe, each gas channel is communicated with the gas output ports and the gas input port of the engine, one end of each air channel is communicated with the inner cavity, the other end of each air channel is communicated with the outside air, and an exhaust fan for extracting the gas in the seal box is.
The fuel gas output port comprises a pre-combustion gas output port and a main fuel gas output port, the pre-combustion gas output port is connected with a pre-combustion chamber of the engine, and the main fuel gas output port is connected with a main combustion chamber of the engine.
As a further improvement of the technical scheme of the invention, the pipeline comprises an on-board pipeline arranged on the engine and an off-board pipeline detachably connected with the on-board pipeline, and one end of the on-board pipeline is provided with a vent communicated with an air channel of the on-board pipeline.
The invention further improves the technical scheme that the connecting ends of the on-board pipeline and the off-board pipeline are provided with mutually matched flange plates, the flange plates are provided with main through holes for connecting a gas channel and a plurality of vent holes for connecting an air channel, and the vent holes are circumferentially distributed around the main through holes.
As further improvement of the technical scheme of the invention, the on-board pipeline comprises a main machine upper pipeline connected with the main combustion chamber, an auxiliary machine upper pipeline connected with the pre-combustion chamber, and a connecting pipe for communicating air channels of the main machine upper pipeline and the auxiliary machine upper pipeline.
As a further improvement of the technical scheme of the invention, a plurality of branch pipelines are led out from the main engine upper pipeline and the auxiliary engine upper pipeline, and one end of each branch pipeline is connected with the engine.
As further improvement of the technical scheme of the invention, the branch pipelines on the pipeline on the main machine are all metal hoses.
As further improvement of the technical scheme of the invention, a plurality of combustible gas probes are arranged on the fuel gas valve element unit.
As further improvement of the technical scheme of the invention, a plurality of gas leakage detection ports are arranged on the pipeline.
The invention has the beneficial effects that: this gas engine's fuel feeding system, double-deck sleeve pipe that has gas passageway and air channel has been set up, and air channel one end in the double-deck sleeve pipe communicates with each other with the inner chamber of seal box, the other end communicates with each other with the outside air, in the gas transportation process, the air exhauster makes the gas in the air channel be in the state of circulation always through the air extraction in the seal box, even gas leakage takes place for the gas channel in the distribution pipeline in the gas valve member unit or the double-deck sleeve pipe, the gas that leaks also can be discharged rapidly by the air exhauster through the air channel, can effectively prevent that the gas from gathering, thereby security performance has been improved.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic piping diagram on an engine according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a branch pipeline on a host according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a connection between an onboard pipeline and an offboard pipeline according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1 to 4, the present invention is a fuel supply system for a gas engine, including a gas valve unit 1 for mixing gas and a pipeline 3 connecting the gas valve unit 1 and the engine 2, the gas valve unit 1 includes a sealed box 11 having an inner cavity and a gas distribution pipeline disposed in the sealed box 11, the gas distribution pipeline is provided with a natural gas inlet 12 communicating with the outside, the gas pipeline comprises an air inlet 13 and a plurality of gas outlets, a pipeline 3 is a plurality of double-layer sleeves, each double-layer sleeve comprises an inner pipe 31 and an outer pipe 32 which are mutually nested, a gas channel 33 is arranged in the inner pipe 31, an air channel 34 is arranged between the inner pipe 31 and the outer pipe 32, each gas channel 33 is communicated with the gas outlets 14 and the gas inlets of the engine 2, one end of each air channel 34 is communicated with the inner cavity, the other end of each air channel 34 is communicated with the outside air, and an exhaust fan 4 for extracting the gas in the seal box 11 is further arranged.
Specifically, the gas valve unit 1 realizes the functions of dynamic pressure regulation, remote opening and closing of pipeline gas transmission, gas diffusion, temperature and pressure transmission, valve position feedback, gas leakage monitoring and the like according to the operation requirements of the engine 2.
A double-layer sleeve having a gas passage 33 and an air passage 34 is provided, and one end of the air passage 34 in the double-layer sleeve is communicated with the inner cavity of the seal box 11 and the other end is communicated with the outside air. In the process of gas delivery, the exhaust fan 4 extracts air in the seal box 11 to enable the gas in the air channel 34 to be in a circulating state all the time, and even if gas leakage occurs in the gas distribution pipeline in the gas valve unit 1 or the gas channel 33 in the double-layer sleeve, the leaked gas can be rapidly discharged from the exhaust fan 4 through the air channel 34, so that gas accumulation can be effectively prevented, and the safety performance is improved.
As a preferred embodiment of the present invention, the gas outlet includes a pre-combustion gas outlet 14 and a main combustion gas outlet 15, the pre-combustion gas outlet 14 is connected to a pre-combustion chamber 21 of the engine 2, and the main combustion gas outlet 15 is connected to a main combustion chamber 22 of the engine 2.
In a preferred embodiment of the present invention, the duct 3 includes an on-board duct 35 mounted on the engine 2 and an off-board duct 36 detachably connected to the on-board duct 35, and one end of the on-board duct 35 is provided with a vent 37 communicating with the air passage 34 thereof.
In a preferred embodiment of the present invention, the connecting ends of the on-board pipeline 35 and the off-board pipeline 36 are provided with flanges 5 matched with each other, the flanges 5 are provided with main through holes 51 for connecting the gas passages 33, and are further provided with a plurality of vent holes 52 for connecting the air passages 34, and the plurality of vent holes 52 are circumferentially distributed around the main through holes 51. When the on-board pipe 35 and the off-board pipe 36 are connected, the respective inner pipes 31 are connected to the main through holes 51 of the flanges 5, the respective outer pipes 32 are capped around the vent holes 52, and the flanges 5 are fixedly connected by bolts, whereby the on-board pipe 35 and the off-board pipe 36 can be connected.
In a preferred embodiment of the present invention, the on-board pipeline 35 includes a main unit upper pipeline 351 connected to the main combustion chamber 22, an auxiliary unit upper pipeline 352 connected to the pre-combustion chamber 21, and a connection pipe for connecting the main unit upper pipeline 351 and the auxiliary unit upper pipeline 352 with the air passage 34, and the main unit upper pipeline 351 and the auxiliary unit upper pipeline 352 are connected with the air passage 34, so that the number of air inlets of the air passage 34 is reduced, and if necessary, the air passage 34 can be actively filled with air through the air inlets to remove combustible gas therein.
In a preferred embodiment of the present invention, a plurality of branch pipes are led out from the main unit upper pipe 351 and the auxiliary unit upper pipe 352, and one end of each branch pipe is connected to the engine 2.
In a preferred embodiment of the present invention, the branch pipes on the main unit pipe 351 are all metal hoses.
In a preferred embodiment of the present invention, the gas valve unit 1 is provided with a plurality of gas probes 6.
The combustible gas probes 6 are arranged above the seal box 11, can send the combustible gas concentration signal of the air channel 34 to the alarm box in real time, and when the concentration reaches a certain limit value, the alarm box gives an alarm and cuts off the gas supply.
As a preferred embodiment of the present invention, the pipeline 3 is provided with a plurality of gas leakage detection ports 7, and the worker can detect the concentration of the combustible gas in the air passage 34 through the gas leakage detection ports 7, thereby monitoring the safety performance of the pipeline 3.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (6)
1. The fuel supply system of the gas engine comprises a gas valve unit (1) used for allocating gas and a pipeline (3) connected with the gas valve unit (1) and the engine (2), wherein the gas valve unit (1) comprises a sealing box (11) with an inner cavity and a gas distribution pipeline arranged in the sealing box (11), the gas distribution pipeline is provided with a natural gas inlet (12), an air inlet (13) and a plurality of gas output ports which are communicated with the outside, and the fuel supply system is characterized in that: the pipeline (3) is a plurality of double-layer sleeves, each double-layer sleeve comprises an inner pipe (31) and an outer pipe (32) which are mutually nested, a gas channel (33) is arranged in the inner pipe (31), an air channel (34) is arranged between the inner pipe (31) and the outer pipe (32), each gas channel (33) is communicated with a gas output port and a gas input port of the engine (2), one end of each air channel (34) is communicated with the inner cavity, the other end of each air channel (34) is communicated with the outside air, an exhaust fan (4) which extracts gas in the seal box (11) is further arranged, each gas output port comprises a pre-combustion gas output port (14) and a main gas output port (15), the pre-combustion gas output port (14) is connected with a pre-combustion chamber (21) of the engine (2), and the main gas output port (15) is connected with a main combustion chamber (22) of the engine (2), pipeline (3) including install on-board pipeline (35) of engine (2) and with on-board pipeline (35) detachable connection's outer pipeline (36), the one end of on-board pipeline (35) is equipped with rather than communicating blow vent (37) of air duct (34), on-board pipeline (35) are including on the host computer pipeline (351) that link to each other with main combustion chamber (22) and auxiliary engine pipeline (352) that link to each other with precombustion chamber (21), still be equipped with the connecting pipe of air duct (34) intercommunication of host computer pipeline (351) and auxiliary engine pipeline (352).
2. The fuel supply system for a gas engine according to claim 1, characterized in that: the quick-witted link of going up pipeline (35) and outer pipeline (36) is equipped with ring flange (5) that match each other, be equipped with main through-hole (51) that are used for connecting gas passageway (33) on ring flange (5), still be equipped with a plurality of air vents (52) that are used for connecting air duct (34), a plurality of air vent (52) encircle main through-hole (51) are the circumference and distribute.
3. The fuel supply system for a gas engine according to claim 2, characterized in that: a plurality of branch pipelines are led out from the main engine upper pipeline (351) and the auxiliary engine upper pipeline (352), and one end of each branch pipeline is connected with the engine (2).
4. The fuel supply system for a gas engine according to claim 3, characterized in that: and branch pipelines positioned on the host machine upper pipeline (351) are all metal hoses.
5. The fuel supply system for a gas engine according to claim 1, characterized in that: the gas valve unit (1) is provided with a plurality of combustible gas probes (6).
6. The fuel supply system for a gas engine according to claim 1, characterized in that: and a plurality of gas leakage detection ports (7) are arranged on the pipeline (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418845.0A CN108825409B (en) | 2018-05-04 | 2018-05-04 | Fuel supply system of gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418845.0A CN108825409B (en) | 2018-05-04 | 2018-05-04 | Fuel supply system of gas engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108825409A CN108825409A (en) | 2018-11-16 |
| CN108825409B true CN108825409B (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810418845.0A Active CN108825409B (en) | 2018-05-04 | 2018-05-04 | Fuel supply system of gas engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN108825409B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3094070B1 (en) * | 2019-03-21 | 2021-10-15 | Air Liquide | A device and method for storing and supplying fluid fuel. |
| CN114576044A (en) * | 2021-11-18 | 2022-06-03 | 上海江南长兴造船有限责任公司 | Gas supply system of dual-fuel generator and ship comprising same |
| JP2023097540A (en) * | 2021-12-28 | 2023-07-10 | 川崎重工業株式会社 | gas engine |
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| CN107131079A (en) * | 2017-07-05 | 2017-09-05 | 广西玉柴机器股份有限公司 | A kind of gas engine supply bimetallic tube |
| CN107143434A (en) * | 2017-06-07 | 2017-09-08 | 广西九壹动力科技有限公司 | A kind of GVU devices and control method |
| CN207080283U (en) * | 2017-06-07 | 2018-03-09 | 广西九壹动力科技有限公司 | Gas engine peculiar to vessel |
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2018
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179598A (en) * | 2013-05-24 | 2014-12-03 | 成都杜嘉机电有限公司 | Array type gas inlet mixing valve |
| CN103675215A (en) * | 2013-12-24 | 2014-03-26 | 安徽省芜湖仪器仪表研究有限责任公司 | Detection simulation system for vehicle-used oxygen sensor |
| KR20150137812A (en) * | 2014-05-30 | 2015-12-09 | 삼성중공업 주식회사 | Fuel gas supplying appratus for ship and fuel gas supplying method for ship |
| CN104989560A (en) * | 2015-08-10 | 2015-10-21 | 广西玉柴机器股份有限公司 | Gvu shielding box |
| CN107091173A (en) * | 2017-06-07 | 2017-08-25 | 广西九壹动力科技有限公司 | A kind of integrated mixer |
| CN107143434A (en) * | 2017-06-07 | 2017-09-08 | 广西九壹动力科技有限公司 | A kind of GVU devices and control method |
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| Publication number | Publication date |
|---|---|
| CN108825409A (en) | 2018-11-16 |
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