CN113357055B - Natural gas supply device for engine - Google Patents
Natural gas supply device for engine Download PDFInfo
- Publication number
- CN113357055B CN113357055B CN202110849603.9A CN202110849603A CN113357055B CN 113357055 B CN113357055 B CN 113357055B CN 202110849603 A CN202110849603 A CN 202110849603A CN 113357055 B CN113357055 B CN 113357055B
- Authority
- CN
- China
- Prior art keywords
- pipe
- double
- wall
- supply pipe
- natural gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- 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
-
- 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
- F02M21/0248—Injectors
-
- 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
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
-
- 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
- F02M21/029—Arrangement on engines or vehicle bodies; Conversion to gaseous fuel supply systems
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The application belongs to the technical field of air supply of engine natural gas systems, and particularly relates to an engine natural gas supply device, which comprises a double-wall supporting pipe, wherein the double-wall supporting pipe is fixedly connected with a natural gas inlet channel of a cylinder cover, a natural gas injection valve is arranged at the upper end of the double-wall supporting pipe, a double-wall corrugated pipe is arranged at the upper end of the natural gas injection valve, a double-wall air supply pipe is arranged at the upper end of the double-wall corrugated pipe, the double-wall supporting pipe comprises an air cavity between double walls, the double-wall corrugated pipe comprises an air cavity between the double walls, the double-wall air supply pipe comprises an air cavity between the double walls, a pressurized air inlet channel is also arranged on the cylinder cover, the pressurized air inlet channel is connected with the natural gas inlet channel in an acute angle, and air can enter the air inlet cavity, when natural gas leaks, the air inlet cavity can suck the natural gas in the air cavity from the air inlet interface, and therefore the concentration of the leaked natural gas is reduced.
Description
Technical Field
The application belongs to the technical field of engine natural gas system air feed, and particularly relates to an engine natural gas feed device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, a marine dual-fuel and natural gas engine is mostly developed on a diesel engine, a natural gas supply system needs to be rearranged, and a smoke exhaust pipe, a cooling water pipe, an engine hoisting part, a valve and other parts are integrated above an engine cylinder cover, so that the whole structure is compact and complex, the natural gas supply system needs to have certain safety guarantee, particularly the safety during natural gas transportation, and the problems of how to be matched with the cylinder cover and the like need to be solved.
Disclosure of Invention
In order to solve the above problems, the present application provides an engine natural gas supply device.
The application aims at providing an engine natural gas supply device, wherein each cylinder of the natural gas supply device is respectively provided with a natural gas injection valve, a double-wall corrugated pipe is installed at the upper end of the natural gas injection valve, gas supply connection and displacement compensation are realized by utilizing the double-wall corrugated pipe, a double-wall supporting pipe is installed at the lower end of the natural gas injection valve, and fixing and gas supply guiding of the natural gas injection valve are realized by utilizing the double-wall supporting pipe.
In order to achieve the purpose of the application, the technical scheme of the application is as follows:
engine natural gas air feeder, including the double-walled stay tube, the natural gas inlet channel fixed connection of double-walled stay tube and cylinder head, the upper end of double-walled stay tube is provided with the natural gas injection valve, the upper end of natural gas injection valve is provided with the double-walled bellows, double-walled bellows upper end is provided with the double-walled air supply pipe, the double-walled stay tube includes the air cavity between the double-walled, the double-walled bellows includes the air cavity between the double-walled, the double-walled air supply pipe includes the air cavity between the double-walled, still be provided with charge air inlet channel on the cylinder head, charge air inlet channel is acute angle with the natural gas inlet channel and is connected.
Furthermore, the double-wall supporting pipe comprises an outer supporting pipe and an inner supporting pipe, first connecting flanges are arranged at two ends of the outer supporting pipe and two ends of the inner supporting pipe, the first connecting flange at one end of the double-wall supporting pipe is fixedly connected with the cylinder cover, a cavity of the inner supporting pipe is hermetically communicated with a natural gas inlet channel of the cylinder cover, an air cavity is formed between the outer supporting pipe and the inner supporting pipe, and the first connecting flange at the other end of the double-wall supporting pipe is fixedly connected with the natural gas injection valve.
Furthermore, the double-wall corrugated pipe comprises an inner corrugated pipe and an outer corrugated pipe, second connecting flanges are arranged at two ends of the inner corrugated pipe and two ends of the outer corrugated pipe respectively, the second connecting flange at one end of the double-wall corrugated pipe is fixedly connected with the natural gas injection valve, the other end of the double-wall corrugated pipe is fixedly connected with the double-wall gas supply pipe, and an air cavity is formed between the inner corrugated pipe and the outer corrugated pipe.
Furthermore, the double-wall air supply pipe comprises an inner air supply pipe and an outer air supply pipe, the inner air supply pipe is connected with the inner corrugated pipe of the double-wall corrugated pipe in a sealing mode, and an air cavity is formed between the inner air supply pipe and the outer air supply pipe.
Furthermore, a connecting pipe is arranged between the inner air supply pipe and the double-wall corrugated pipe, one end of the connecting pipe penetrates through the outer air supply pipe and then is communicated with the inner air supply pipe in a sealing mode, and the other end of the connecting pipe is fixedly connected with the double-wall corrugated pipe.
Furthermore, a pressure sensor and a temperature sensor are arranged between the inner air supply pipe and the outer air supply pipe.
Further, outer air supply pipe is square steel pipe, and interior air supply pipe is circular seamless steel pipe, and outer air supply pipe upper end is provided with the interface of admitting air, and the interface connection draught fan admits air, draught fan, pressure sensor and temperature sensor connection director, and when the temperature or the pressure of the air cavity between outer air supply pipe and the interior air supply pipe exceeded the controller and set for the threshold value, controller control draught fan started, and the air cavity between outer air supply pipe and the interior air supply pipe is sucked through the draught fan.
Further, an air inlet interface is arranged at the air inlet end of the double-wall air supply pipe, and the air inlet interface is positioned at the upper end of the double-wall air supply pipe.
Further, a flange is arranged at one end, close to the outer corrugated pipe, of a second connecting flange, a second sleeve is arranged between the outer corrugated pipe and the second connecting flange, the end face of one end of the second sleeve is fixedly connected with the flange, an annular bulge is arranged at one end, close to the outer corrugated pipe, of the second sleeve, an inner periphery of the outer corrugated pipe is fixedly connected with the outer periphery of the outer corrugated pipe, a first sleeve is arranged between the second connecting flange and the inner corrugated pipe, a central hole is formed in the second connecting flange and comprises at least two disc-shaped cavities different in size, the diameter of the disc-shaped cavity close to one side of the inner corrugated pipe is larger than that of the disc-shaped cavity far away from one side of the inner corrugated pipe, the inner periphery of the inner corrugated pipe is fixedly connected with the outer periphery of one end of the first sleeve, the outer periphery of the other end of the first sleeve is fixedly connected with the inner periphery of the central hole, a ventilation hole is formed in the second connecting flange, and the ventilation hole is communicated with an air cavity of the double walls.
Furthermore, be provided with many connecting pipes on the double-walled air supply pipe, the connecting pipe includes fixed plate and the boss of being connected with the fixed plate, has seted up the opening on the outer air supply pipe, has seted up the opening on the interior air supply pipe, and the boss passes opening on the outer air supply pipe after with the opening sealing connection of interior air supply pipe, on the fixed outer air supply pipe of fixed plate, the opening on the outer air supply pipe of fixed plate shutoff is provided with the connecting hole on the fixed plate, the connecting hole runs through fixed plate and external intercommunication.
Compared with the prior art, the beneficial effect of this application is:
1. this application sets up natural gas inlet channel and pressurized air inlet channel and both are the acute angle and arrange on the cylinder head, forms and thoughtlessly moves the structure and admit air, and the natural gas and the intensive mixing of pressurized air of being convenient for have reduced pressurized air's resistance of admitting air simultaneously.
2. The double-walled structure of this application for the air can get into the cavity of admitting air, and when natural gas takes place to reveal, the cavity of admitting air can be followed the natural gas that admits air in the interface with the air cavity and sucked, and then makes the natural gas concentration who reveals reduce, and in addition, temperature sensor and pressure sensor are arranged in the air cavity to this application, so that the supply state of real-time supervision engine natural gas.
3. This application interface of admitting air is close to the department of admitting air of natural gas, and the interface of admitting air arranges the upper end at double-walled air supply pipe, is convenient for connecting line and reduces the ventilation blind area.
4. The application is matched with the cylinder cover through the double-wall supporting pipe, and the natural gas injection valve is supported through the double-wall supporting pipe so as to support the integral structure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic overall structure diagram of the present application.
Fig. 2 is a schematic side view of the structure of fig. 1.
FIG. 3 is a schematic view of the overall structure of a double wall gas supply pipe according to the present application.
Fig. 4 is a schematic view of the overall structure of the double-wall corrugated pipe of the present application.
In the figure: 1. the device comprises a double-wall supporting pipe, a natural gas injection valve, a double-wall corrugated pipe 3, a double-wall gas supply pipe 4, a gas inlet connector 5, a gas inlet connector 6 and a connecting pipe;
3-1, 3-2, 3-3, 3-4 and 3-4 parts of a first sleeve;
4-1, an inner air supply pipe, 4-2 and an outer air supply pipe;
6-1 parts of fixing plates, 6-2 parts of bosses, 6-3 parts of connecting holes.
The specific implementation mode is as follows:
the present application will be further described with reference to the following drawings and examples.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
Example 1
The application relates to an engine natural gas supply device, which provides natural gas supply for a dual-fuel engine, and the main structure of the gas supply device comprises a double-wall supporting pipe 1, a natural gas injection valve 2, a double-wall corrugated pipe 3, a double-wall gas supply pipe 4 and a cylinder cover which is needed to be used on the engine, wherein the cylinder cover is provided with a plurality of natural gas inlet channels and pressurizing channels, so that each double-wall supporting pipe 1 corresponds to one natural gas inlet channel, the double-wall supporting pipe 1 is fixedly connected with the cylinder cover, so that a natural gas conveying cavity in the double-wall supporting pipe 1 is communicated with the natural gas inlet channel on the cylinder cover, the natural gas injection valve 2 is fixedly arranged at the upper end of the double-wall supporting pipe 1, the double-wall corrugated pipe 3 is fixedly arranged at the upper end of the double-wall corrugated pipe 3, the double-wall gas supply pipe 4 is fixedly arranged at the upper end of the double-wall supporting pipe 1, and comprises an air cavity between double walls, the double-wall corrugated pipe 3 comprises an air cavity between double walls, the double-wall air supply pipe 4 comprises an air cavity between the double walls, a pressurized air inlet channel is arranged on the cylinder cover, the pressurized air inlet channel is connected with the natural gas inlet channel at an acute angle, the air cavity in the double-wall corrugated pipe 3 is communicated with the air cavity in the double-wall air supply pipe 4, and then natural gas in the double-wall air supply pipe 4 enters the double-wall supporting pipe 1 under the action of the natural gas injection valve 2 along the double-wall corrugated pipe 3, and then enters the cylinder of the engine along the natural gas inlet channel on the cylinder cover.
The present embodiment describes a specific structure of each component of the gas supply apparatus:
double-walled stay tube 1: the main components are an outer supporting pipe and an inner supporting pipe, the outer supporting pipe wraps the inner supporting pipe, the first connecting flanges are fixedly installed at two ends of the outer supporting pipe and the inner supporting pipe, and the first connecting flanges are welded with the outer supporting pipe and the inner supporting pipe, so that the inner supporting pipe and the outer supporting pipe in the embodiment are round seamless steel pipes made of stainless steel, the first connecting flange at one end of the double-wall supporting pipe 1 is fixedly connected with the cylinder cover in a bolt connection mode, an O-shaped sealing ring or a sealing cushion disc is installed between the cylinder cover and the first connecting flange to form a sealing structure, the cavity of the inner supporting pipe is further hermetically communicated with a natural gas inlet channel of the cylinder cover, an air cavity is formed between the outer supporting pipe and the inner supporting pipe, and the first connecting flange at the other end of the double-wall supporting pipe 1 is fixedly connected with the natural gas injection valve 2 through bolts, the double-walled support tube 1 of the present embodiment is short, and mainly serves as a connection and support for supporting the natural gas injection valve 2.
The double-wall corrugated pipe 3 of this embodiment includes an inner corrugated pipe 3-1 and an outer corrugated pipe 3-2, and second connection flanges are respectively disposed at two ends of the inner corrugated pipe 3-1 and the outer corrugated pipe 3-2, and because the inner corrugated pipe 3-1 and the outer corrugated pipe 3-2 are stainless steel woven pipes with corrugations, the current inner corrugated pipe 3-1 and the current outer corrugated pipe 3-2 cannot be directly connected with the second connection flanges, and this embodiment realizes the connection between the corrugated pipe and the flanges through a sleeve, for example, the present embodiment adopts a scheme that: a flange is arranged at one end, close to the outer corrugated pipe 3-2, of the second connecting flange, when the second connecting flange is manufactured, the flange is integrally formed with the second connecting flange, a second sleeve pipe 3-4 is arranged between the outer corrugated pipe 3-2 and the second connecting flange, the end face of one end of the second sleeve pipe 3-4 is fixedly connected with the flange in a welding mode, an annular bulge is arranged on the periphery of one end, close to the outer corrugated pipe 3-2, of the second sleeve pipe 3-4, when the second sleeve pipe 3-4 is manufactured, the second sleeve pipe 3-4 is conveniently and integrally formed, the inner periphery of the outer corrugated pipe 3-2 is fixedly connected with the periphery of the bulge in a welding mode, a first sleeve pipe 3-3 is arranged between the second connecting flange and the inner corrugated pipe 3-1, a central hole is formed in the second connecting flange, in order to facilitate the matching of the first sleeve 3-3 and the central hole, the central hole comprises at least two disc-shaped cavities with different sizes, the diameter of the disc-shaped cavity on the side close to the inner corrugated pipe 3-1 is larger than that of the disc-shaped cavity on the side far away from the inner corrugated pipe 3-1, the inner periphery of the inner corrugated pipe 3-1 is fixedly connected with the outer periphery of one end of the first sleeve 3-3, the outer periphery of the other end of the first sleeve 3-3 is fixedly connected with the inner periphery of the central hole in a welding mode, in addition, the second connecting flange is provided with a vent hole, the vent hole is communicated with the air cavity of the double-wall corrugated pipe 3, and the vent hole of the embodiment is matched with the double-wall air supply pipe 4 for use.
The second connecting flange of one end of the double-wall corrugated pipe 3 is fixedly connected with the natural gas injection valve 2, the fixed connection mode is bolt fixed connection, the other end of the double-wall corrugated pipe 3 is fixedly connected with the double-wall air supply pipe 4, an air cavity is formed between the inner corrugated pipe 3-1 and the outer corrugated pipe 3-2, each cylinder of the natural gas injection valve 2 corresponds to one double-wall support pipe 1, each cylinder corresponds to one natural gas injection valve 2, and the natural gas injection valves 2 are used for providing natural gas for the engine in a timed and quantitative mode.
The double-wall air supply pipe 4 of the embodiment comprises an inner air supply pipe 4-1 and an outer air supply pipe 4-2, wherein the inner air supply pipe 4-1 is connected with the inner corrugated pipe 3-1 of the double-wall corrugated pipe 3 in a sealing manner, an air cavity is formed between the inner air supply pipe 4-1 and the outer air supply pipe 4-2, flanges are mounted at one ends of the end parts of the inner air supply pipe 4-1 and the outer air supply pipe 4-2, the flanges are fixedly connected with the inner air supply pipe 4-1 and the outer air supply pipe 4-2, the inner air supply pipe 4-1 and the outer air supply pipe 4-2 are sealed through the flanges, the flanges can be called as third connecting flanges, the third connecting flanges are fixedly connected with other parts through bolts to provide other supporting points or supporting ends for an air supply device, and the inner air supply pipe 4-1 and the outer air supply pipe 4-2 are sealed through a sealing plate at the other ends of the inner air supply pipe 4-1 and the outer air supply pipe 4-2 The gas filter is installed at the input end of the inner gas supply pipe 4-1 for purifying the input gas, in addition, a connecting pipe 6 is arranged between the inner gas supply pipe 4-1 and the double-wall corrugated pipe 3, one end of the connecting pipe 6 penetrates through the outer gas supply pipe 4-2 and then is hermetically communicated with the inner gas supply pipe 4-1, the other end of the connecting pipe 6 is fixedly connected with the double-wall corrugated pipe 3, and the specific structure of the connecting pipe 6 in the embodiment is as follows: the double-wall air supply pipe 4 is provided with a plurality of connecting pipes 6, each connecting pipe 6 comprises a fixing plate 6-1 and a boss 6-2 connected with the fixing plate 6-1, an opening is arranged on the outer air supply pipe 4-2, an opening is arranged on the inner air supply pipe 4-1, the boss 6-2 penetrates through the opening on the outer air supply pipe 4-2 and then is connected with the opening of the inner air supply pipe 4-1 in a sealing manner, the fixing plate is fixed on the outer air supply pipe 4-2, the fixing plate 6-1 blocks the opening on the outer air supply pipe 4-2, a connecting hole 6-3 is arranged on the fixing plate 6-1, the fixing plate 6-1 has the function of a flange, the fixing plate 6-1 and a second connecting flange on the double-wall corrugated pipe 3 are fixed together through bolts, and an O-shaped sealing ring is arranged between the fixing plate 6-1 and the second connecting flange to realize sealing, the connecting holes 6-3 are aligned with the vent holes on the double-wall corrugated pipe 3, so that the air cavities on the double-wall corrugated pipe 3 are communicated with the air cavities on the double-wall air supply pipe 4.
As a further embodiment, a pressure sensor and a temperature sensor are arranged between the inner air supply pipe 4-1 and the outer air supply pipe 4-2, the outer air supply pipe 4-2 is a square steel pipe, the inner air supply pipe 4-1 is a round seamless steel pipe, an air inlet interface 5 is arranged at the upper end of the outer air supply pipe 4-2, the air inlet interface 5 is connected with an induced draft fan, the pressure sensor and the temperature sensor are connected with a controller, when the temperature or the pressure of an air cavity between the outer air supply pipe 4-2 and the inner air supply pipe 4-1 exceeds a set threshold value of the controller, the controller controls the induced draft fan to be started, the air cavity between the outer air supply pipe 4-2 and the inner air supply pipe 4-1 is sucked through the induced draft fan, the air inlet interface 5 is arranged at the air inlet end of the double-wall air supply pipe 4, the air inlet interface 5 is positioned at the upper end of the double-wall air supply pipe 4, like this, this application can be so that the air can get into the cavity of admitting air, when natural gas takes place to reveal, the cavity of admitting air can be followed interface 5 of admitting air and is inhaled the natural gas in with the air cavity, and then make the natural gas concentration who reveals reduce, in addition, temperature sensor and pressure sensor are arranged to this application in the air cavity, so that the supply state of real-time supervision engine natural gas, and interface 5 of admitting air is close to the department of admitting air of natural gas, and interface 5 of admitting air arranges the upper end at double-walled air supply pipe 4, be convenient for connect 6 way of pipe and reduce the ventilation blind area.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the embodiments of the present application have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present application, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive effort by those skilled in the art.
Claims (8)
1. The natural gas supply device for the engine is characterized by comprising a double-wall supporting pipe (1), wherein a natural gas conveying cavity in the double-wall supporting pipe (1) is communicated with a natural gas inlet channel of a cylinder cover, a natural gas injection valve (2) is arranged at the upper end of the double-wall supporting pipe (1), a double-wall corrugated pipe (3) is arranged at the upper end of the natural gas injection valve (2), and a double-wall gas supply pipe (4) is arranged at the upper end of the double-wall corrugated pipe (3);
the double-wall supporting pipe (1) comprises an air cavity between double walls, the double-wall corrugated pipe (3) comprises an air cavity formed between the double walls, the double-wall air supply pipe (4) comprises an air cavity formed between the double walls, and the air cavity in the double-wall corrugated pipe (3) is communicated with the air cavity in the double-wall air supply pipe (4);
the cylinder cover is also provided with a pressurized air inlet channel, and the pressurized air inlet channel is connected with the natural gas inlet channel in an acute angle;
the double-wall corrugated pipe (3) comprises an inner corrugated pipe (3-1) and an outer corrugated pipe (3-2), second connecting flanges are arranged at two ends of the inner corrugated pipe (3-1) and two ends of the outer corrugated pipe (3-2), the second connecting flange at one end of the double-wall corrugated pipe (3) is fixedly connected with the natural gas injection valve (2), and the other end of the double-wall corrugated pipe (3) is fixedly connected with the double-wall gas supply pipe (4);
an air cavity is formed between the inner corrugated pipe (3-1) and the outer corrugated pipe (3-2);
the double-wall air supply pipe (4) comprises an inner air supply pipe (4-1) and an outer air supply pipe (4-2), and the inner air supply pipe (4-1) is connected with an inner corrugated pipe (3-1) of the double-wall corrugated pipe (3) in a sealing manner;
an air cavity is formed between the inner air supply pipe (4-1) and the outer air supply pipe (4-2);
the utility model discloses an air supply pipe, including outer air supply pipe (4-2), air inlet interface (5) connect the draught fan, pressure sensor and temperature sensor connection director, when the temperature or the pressure of the air cavity between outer air supply pipe (4-2) and interior air supply pipe (4-1) surpassed the controller and set for the threshold value, controller control draught fan started, carries out the suction to the air cavity between outer air supply pipe (4-2) and interior air supply pipe (4-1) through the draught fan.
2. The engine natural gas supply device according to claim 1, characterized in that the double-wall supporting pipe (1) comprises an outer supporting pipe and an inner supporting pipe, first connecting flanges are arranged at two ends of the outer supporting pipe and the inner supporting pipe, the first connecting flange at one end of the double-wall supporting pipe (1) is fixedly connected with the cylinder cover, a cavity of the inner supporting pipe is in sealed communication with a natural gas inlet channel of the cylinder cover, and an air cavity is formed between the outer supporting pipe and the inner supporting pipe;
and a first connecting flange at the other end of the double-wall supporting pipe (1) is fixedly connected with the natural gas injection valve (2).
3. The natural gas supply device for the engine as claimed in claim 1, wherein a connecting pipe (6) is arranged between the inner gas supply pipe (4-1) and the double-wall corrugated pipe (3), one end of the connecting pipe (6) penetrates through the outer gas supply pipe (4-2) and then is in sealed communication with the inner gas supply pipe (4-1), and the other end of the connecting pipe (6) is fixedly connected with the double-wall corrugated pipe (3).
4. The engine natural gas supply device according to claim 3, characterized in that a pressure sensor and a temperature sensor are provided between the inner air supply pipe (4-1) and the outer air supply pipe (4-2).
5. The engine natural gas supply device according to claim 4, characterized in that the outer gas supply pipe (4-2) is a square steel pipe, and the inner gas supply pipe (4-1) is a round seamless steel pipe.
6. The engine natural gas supply apparatus according to claim 1, characterized in that the air inlet joint (5) is arranged at an air inlet end of the double-wall air supply pipe (4), the air inlet joint (5) being located at an upper end of the double-wall air supply pipe (4).
7. The engine natural gas supply device according to claim 1, characterized in that a flange is arranged at one end of the second connecting flange close to the outer corrugated pipe (3-2), a second sleeve (3-4) is arranged between the outer corrugated pipe (3-2) and the second connecting flange, the end surface of one end of the second sleeve (3-4) is fixedly connected with the flange, an annular bulge is arranged at the outer periphery of one end of the second sleeve (3-4) close to the outer corrugated pipe (3-2), and the inner periphery of the outer corrugated pipe (3-2) is fixedly connected with the outer periphery of the bulge;
a first sleeve (3-3) is arranged between the second connecting flange and the inner corrugated pipe (3-1), the second connecting flange is provided with a central hole, the central hole comprises at least two disc-shaped cavities with different sizes, and the diameter of the disc-shaped cavity on one side close to the inner corrugated pipe (3-1) is larger than that of the disc-shaped cavity on one side far away from the inner corrugated pipe (3-1);
the inner periphery of the inner corrugated pipe (3-1) is fixedly connected with the outer periphery of one end of the first sleeve (3-3), and the outer periphery of the other end of the first sleeve (3-3) is fixedly connected with the inner periphery of the central hole;
and the second connecting flange is provided with a vent hole which is communicated with an air cavity of the double-wall corrugated pipe (3).
8. The natural gas supply device for the engine as claimed in claim 1, wherein the double-wall gas supply pipe (4) is provided with a plurality of connecting pipes (6), each connecting pipe (6) comprises a fixing plate (6-1) and a boss (6-2) connected with the fixing plate (6-1), the outer gas supply pipe (4-2) is provided with an opening, the inner gas supply pipe (4-1) is provided with an opening, the boss (6-2) penetrates through the opening of the outer gas supply pipe (4-2) and then is connected with the opening of the inner gas supply pipe (4-1) in a sealing manner, the fixing plate is fixed on the outer gas supply pipe (4-2), and the fixing plate (6-1) blocks the opening of the outer gas supply pipe (4-2);
the fixing plate (6-1) is provided with a connecting hole (6-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110849603.9A CN113357055B (en) | 2021-07-27 | 2021-07-27 | Natural gas supply device for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110849603.9A CN113357055B (en) | 2021-07-27 | 2021-07-27 | Natural gas supply device for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113357055A CN113357055A (en) | 2021-09-07 |
| CN113357055B true CN113357055B (en) | 2022-04-22 |
Family
ID=77540406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110849603.9A Active CN113357055B (en) | 2021-07-27 | 2021-07-27 | Natural gas supply device for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113357055B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234405A (en) * | 2022-06-23 | 2022-10-25 | 河南柴油机重工有限责任公司 | Gas engine air inlet pipeline protection device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI122871B (en) * | 2010-09-10 | 2012-08-15 | Waertsilae Finland Oy | LNG containers |
| EP2915993B1 (en) * | 2011-11-04 | 2017-08-16 | Caterpillar Motoren GmbH & Co. KG | Double walled fuel supply pipe element |
| CN211623564U (en) * | 2020-08-31 | 2020-10-02 | 潍柴重机股份有限公司 | High-pressure gas injection structure |
-
2021
- 2021-07-27 CN CN202110849603.9A patent/CN113357055B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113357055A (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113357055B (en) | Natural gas supply device for engine | |
| CN202832739U (en) | Exhaust manifold catalytic converter assembly | |
| CN215862282U (en) | Gas pipeline compensation device | |
| CN207196494U (en) | A kind of desk-top blowtorch | |
| CN207686879U (en) | A kind of forklift engine gas handling system with muffler | |
| CN212054939U (en) | Air inlet pipe of diesel engine | |
| CN111255971B (en) | Annular cavity expansion compensator | |
| CN111577494B (en) | Intake manifold with waste gas inlet hole | |
| CN209228616U (en) | A kind of low noise roots blower skid mounted equipment | |
| CN206302295U (en) | Direct-connected air/water cooler water leakage monitoring device | |
| CN215335786U (en) | Liquid unloading device for liquefied gas transport vehicle | |
| CN206221097U (en) | A kind of vapour EGR coolers for automobile | |
| CN206159832U (en) | Gas circuit leak hunting device | |
| CN213622272U (en) | Detachable pipeline booster | |
| CN220707389U (en) | Oxygen supply automatic regulating auxiliary device for boiler combustion | |
| CN220551187U (en) | Diesel supply system for diesel generator set | |
| CN219220333U (en) | Reverse circulation continuous sand washing reversing nipple | |
| CN206158889U (en) | A outlet duct for exhaust gas recirculation system | |
| CN210799130U (en) | Fuel-saving accelerator for automobile | |
| CN214247535U (en) | Integrated gas flow direction control device | |
| CN213574778U (en) | Sealing assembly of fan bearing group | |
| CN212252072U (en) | Steel pipe internal diameter inflatable sealing device | |
| CN214580449U (en) | Intelligent valve device for gas tank | |
| CN211500791U (en) | High-strength intercooler air pipe | |
| CN218347472U (en) | Gas pipeline with filter element for marine engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |