CN112810432B - Integrated fuel supply device of light LNG (liquefied Natural gas) commercial vehicle - Google Patents
Integrated fuel supply device of light LNG (liquefied Natural gas) commercial vehicle Download PDFInfo
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- CN112810432B CN112810432B CN202110029793.XA CN202110029793A CN112810432B CN 112810432 B CN112810432 B CN 112810432B CN 202110029793 A CN202110029793 A CN 202110029793A CN 112810432 B CN112810432 B CN 112810432B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/063—Arrangement of tanks
- B60K15/067—Mounting of tanks
- B60K15/07—Mounting of tanks of gas tanks
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Abstract
An integrated fuel supply device of a light LNG (liquefied natural gas) commercial vehicle comprises an installation frame and an LNG vehicle-mounted bottle arranged on the installation frame, wherein a distribution head is arranged at one end of the LNG vehicle-mounted bottle, a first economic valve is arranged below the distribution head, one end of the first economic valve is communicated with the inside of the LNG vehicle-mounted bottle through the distribution head, the other end of the first economic valve is communicated with one end of a bypass pipeline, the other end of the bypass pipeline is communicated with the inside of the LNG vehicle-mounted bottle and one end of a gas bottle liquid outlet pipe through the distribution head, and the other end of the gas bottle liquid outlet pipe is communicated with a gas supply system; the lower part of the LNG vehicle-mounted bottle is provided with a pressurization pipeline three-way joint, a first port of the pressurization pipeline three-way joint is communicated with the inside of the LNG vehicle-mounted bottle, a second port of the pressurization pipeline three-way joint is communicated with the inside of the LNG vehicle-mounted bottle sequentially through a second economic valve, a supercharger, a self-pressurization pipeline and a distribution head, and a third port of the pressurization pipeline three-way joint is communicated with a tank car safety valve. The design is compact in arrangement, environment-friendly and better in economical efficiency.
Description
Technical Field
The invention relates to an integrated fuel supply device, in particular to an integrated fuel supply device for a light LNG (liquefied natural gas) commercial vehicle, which is particularly suitable for supplying fuel to the light LNG commercial vehicle.
Background
With the increasing requirements of emission regulations, the use amount of commercial vehicles using liquefied natural gas (LNG for short) as fuel is increasing due to the advantages of low emission, low pollution, low price, and the like.
In the prior art, a gas supply system on an LNG vehicle is generally divided into a gas cylinder, a self-pressurization finned tube, a vaporizer, a buffer tank, a pressure stabilizer, and matched parts such as the vaporizer, the buffer tank, the pressure stabilizer, a low-pressure gas cut-off valve and the like are required due to the large volume of an LNG gas storage cylinder. For the LNG transportation tank car, in the transportation process, the low-temperature liquid LNG in the LNG tank car tank can evaporate into gaseous natural gas, and after the pressure in the tank reaches a certain value, natural gas can be discharged to the atmosphere, so that environmental pollution and resource waste are caused. In addition, for a special vehicle, a secondary engine needs to be installed on the special vehicle for fuel supply, an existing LNG supply system is not provided with an integrated secondary engine air intake, and needs to be automatically modified, so that potential safety hazards exist; and the light commercial vehicle has short wheelbase and small chassis space, so that the LNG supply system is difficult to arrange.
Disclosure of Invention
The invention aims to solve the problems that low-temperature liquid LNG in an LNG tank car tank is evaporated and wasted and an auxiliary engine air intake is not arranged in the conventional LNG air supply system in the prior art, and provides an integrated fuel supply device of a light LNG commercial vehicle, which can recover natural gas evaporated by the LNG tank car tank and is integrated with the auxiliary engine air intake.
In order to achieve the above purpose, the technical solution of the invention is as follows:
the integrated fuel supply device of the light LNG commercial vehicle comprises an LNG vehicle-mounted bottle and an installation frame, wherein the LNG vehicle-mounted bottle is installed on the installation frame;
a distribution head is arranged at the bottle mouth of the LNG vehicle-mounted bottle, a first economic valve is arranged below the distribution head, one end of the first economic valve is communicated with the interior of the LNG vehicle-mounted bottle through a pressurization port of the distribution head, the other end of the first economic valve is communicated with a liquid outlet of the distribution head through a bypass pipeline, the liquid outlet of the distribution head is also communicated with one end of a gas bottle liquid outlet pipe, and the other end of the gas bottle liquid outlet pipe is communicated with a gas supply system;
the lower part of the LNG vehicle-mounted bottle is provided with a pressurization pipeline tee joint, a first port of the pressurization pipeline tee joint is communicated with the inside of the LNG vehicle-mounted bottle, a second port of the pressurization pipeline tee joint is communicated with one end of a self-pressurization pipeline through a second economic valve and a supercharger in sequence, and the other end of the self-pressurization pipeline is communicated with the inside of the LNG vehicle-mounted bottle through a pressurization port of a distribution head; and a third port of the pressurization pipeline tee joint is communicated with a tank car safety valve through a tank car connecting pipeline.
The gas supply system includes vaporizer, buffer tank, stabiliser and low pressure gas trip valve, the input and the gas cylinder drain pipe of vaporizer are linked together, the output of vaporizer loops through the input of buffer tank and stabiliser and low pressure gas trip valve and is linked together, the output and the engine of low pressure gas trip valve are linked together.
The mounting frame is fixedly connected to the frame and comprises a strap and two L-shaped supports which are symmetrically arranged, and the bottoms of the two L-shaped supports are connected through a connecting plate;
LNG vehicle-mounted bottle passes through the strap to be fixed on L shape support, the lateral part fixedly connected with buffer tank installing support of connecting plate, buffer tank fixed mounting is on the buffer tank installing support, the vaporizer is fixed to be set up between two L shape supports, and the vaporizer is located between LNG vehicle-mounted bottle and the buffer tank, keep away from fixedly connected with stabiliser support on the L shape support of distributing head, stabiliser support and LNG vehicle-mounted bottle are located the different sides of L shape support stand respectively, stabiliser and the equal fixed mounting of low pressure gas trip valve are on the stabiliser support.
The junction of stabiliser support and installation frame is provided with damping cushion, the stabiliser support passes through damping cushion and installation frame fixed connection.
The damping cushion comprises a rubber pad and a metal bushing, the metal bushing comprises an annular gasket and a sleeve which are integrated, the middle part of the annular gasket is vertically connected with the end part of the sleeve, the rubber gasket is sleeved on the outer wall of the sleeve, the annular gasket is in limit fit with one end of the rubber pad, the other end of the rubber pad is a boss, and the boss and the rubber pad are integrated;
and a connecting bolt is arranged in the metal bushing, and a stud of the connecting bolt sequentially penetrates through the voltage stabilizer support, the annular gasket, the sleeve, the rubber pad and the boss and then is in threaded connection with the installation frame.
The buffer tank is communicated with the voltage stabilizer through a spare gas port three-way connector, a first port of the spare gas port three-way connector is communicated with the output end of the buffer tank through a connecting pipeline, a second port of the spare gas port three-way connector is communicated with the input end of the voltage stabilizer through a connecting pipeline, a third port of the spare gas port three-way connector is communicated with one end of the first manual control valve, and the other end of the first manual control valve is a spare gas taking port.
And a second manual control valve and a one-way valve are sequentially arranged on the tank car connecting pipeline from one end of the pressure increasing pipeline three-way joint to one end of the tank car safety valve.
The set value of the opening pressure of the tank truck and tank safety valve is 0.75Mpa, and the set value of the opening pressure of the second economic valve is more than 0.7Mpa and less than the set value of the opening pressure of the tank truck and tank safety valve.
The supercharger is a self-supercharging finned tube.
Compared with the prior art, the invention has the beneficial effects that:
1. one end of a first economic valve in the integrated fuel supply device of the light LNG commercial vehicle is communicated with the interior of an LNG vehicle-mounted bottle through a distribution head, the other end of the first economic valve is communicated with one end of a bypass pipeline, the other end of the bypass pipeline is simultaneously communicated with the interior of the LNG vehicle-mounted bottle and one end of a gas bottle liquid outlet pipe through the distribution head to form an LNG vehicle-mounted bottle exhaust and recovery passage, when partial liquefied natural gas in the LNG vehicle-mounted bottle is evaporated to increase the pressure in the bottle body and exceeds the set pressure of the first economic valve, gaseous natural gas in the LNG vehicle-mounted bottle pushes the first economic valve open and flows through the bypass pipeline, the gas bottle liquid outlet pipe and a gas supply system in sequence to enter an engine for combustion, and energy waste is reduced. Therefore, the first economic valve and the bypass pipeline in the design form an LNG vehicle-mounted bottle exhaust recovery passage, energy waste can be reduced, and fuel economy is high.
2. The lower part of an LNG vehicle-mounted bottle in the integrated fuel supply device of the light LNG commercial vehicle is provided with a three-way joint of a pressurization pipeline, two ports of the pressurization pipeline three-way joint are respectively communicated with the interior of the LNG vehicle-mounted bottle and the tank safety valve, a third port of the pressurization pipeline three-way joint is communicated with the interior of the LNG vehicle-mounted bottle sequentially through a second economic valve, a supercharger, a self-pressurization pipeline and a distribution head to form an LNG tank exhaust recovery passage, when the liquid LNG in the LNG tank car tank is evaporated into gaseous natural gas, the pressure in the tank car tank is increased to reach the opening pressure of the tank car tank safety valve, gaseous state natural gas top fluting car jar relief valve in the tank car jar flows through booster line tee joint, second economic valve, booster, from booster line and distributor head in proper order and gets into the storage of LNG in the on-vehicle bottle and use, the waste of the natural gas in the LNG tank car jar that significantly reduces. Therefore, tank relief valve, booster line tee bend joint, second economic valve, booster in this design, form LNG tank wagon jar exhaust recovery passageway from booster line and distributor head, the natural gas's in the LNG tank wagon jar waste that significantly reduces, fuel economy is high.
3. The integrated fuel supply device of the light LNG commercial vehicle is characterized in that an LNG vehicle-mounted bottle in the integrated fuel supply device of the light LNG commercial vehicle is fixed on an L-shaped support through a strap, a buffer tank is mounted on a buffer tank mounting support located on the side portion of a connecting plate, a vaporizer is fixedly arranged between the two L-shaped supports and located between the LNG vehicle-mounted bottle and the buffer tank, a voltage stabilizer and a low-pressure fuel gas cut-off valve are fixed on the L-shaped supports through voltage stabilizer supports, and the whole integrated fuel supply device is compact in arrangement; stabiliser and low pressure gas trip valve all fix on L shape support through the stabiliser support, and for stabiliser and low pressure gas trip valve setting among the prior art on solebar, occupation space is littleer, is convenient for arrange the installation. Therefore, the design is compact in layout, the voltage stabilizer and the low-pressure gas cut-off valve are fixed on the L-shaped support through the voltage stabilizer support, the occupied space is smaller, and arrangement and installation are facilitated.
4. The shock absorption cushion is arranged at the joint of the mounting frame and the voltage stabilizer bracket in the integrated fuel supply device of the light LNG commercial vehicle, can reduce abnormal abrasion of a valve core of the low-pressure gas cut-off valve caused by vibration of a vehicle body, is higher in safety performance, and prolongs the service life of the low-pressure gas cut-off valve. Consequently, the junction of stabiliser support and installation frame is provided with damping cushion in this design, extension low pressure gas trip valve's when improving the security performance life.
5. The buffer tank in the integrated fuel supply device of the light LNG commercial vehicle is communicated with the pressure stabilizer through the spare gas port three-way joint, the other port of the spare gas port three-way joint is communicated with one end of the first manual control valve, the other end of the first manual control valve is a spare gas taking port, the auxiliary engine or other additionally-arranged devices of the special vehicle can take gas through the spare gas taking port, the special vehicle does not need to be automatically modified when the LNG gas supply system is used, and potential safety hazards are reduced. Therefore, a standby air inlet is arranged in the design, and the device additionally arranged on the special vehicle can take air through the standby air inlet, so that potential safety hazards caused by self-remanufacturing are avoided.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a schematic view showing the structure of the cushion pad of fig. 1.
FIG. 4 is a schematic view of the connection structure of the three-way connection of the spare air port in FIG. 1.
In the figure: the LNG vehicle-mounted bottle 1, the distribution head 11, the bypass pipeline 12, the pressurization pipeline tee joint 13, the self-pressurization pipeline 14, the pressurizer 15, the mounting frame 2, the strap 21, the L-shaped bracket 22, the connecting plate 23, the buffer tank mounting bracket 24, the pressurizer bracket 25, the gas supply system 3, the vaporizer 31, the buffer tank 32, the pressurizer 33, the low-pressure gas cut-off valve 34, the first economic valve 41, the second economic valve 42, the gas bottle outlet pipe 5, the tank connecting pipeline 6, the second manual control valve 61, the one-way valve 62, the tank safety valve 7, the damping cushion 8, the rubber pad 81, the metal bushing 82, the annular gasket 821, the sleeve 822, the boss 83, the connecting bolt 84, the spare gas port tee joint 91 and the first manual control valve 92.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 4, the integrated fuel supply device for a light-duty LNG commercial vehicle comprises an LNG vehicle-mounted bottle 1 and a mounting frame 2, wherein the LNG vehicle-mounted bottle 1 is mounted on the mounting frame 2, the integrated fuel supply device for a light-duty LNG commercial vehicle further comprises a gas supply system 3, and the gas supply system 3 is fixedly mounted on the mounting frame 2;
A distribution head 11 is arranged at the bottle mouth of the LNG vehicle-mounted bottle 1, a first economic valve 41 is arranged below the distribution head 11, one end of the first economic valve 41 is communicated with the inside of the LNG vehicle-mounted bottle 1 through a pressurization port of the distribution head 11, the other end of the first economic valve 41 is communicated with a liquid outlet of the distribution head 11 through a bypass pipeline 12, the liquid outlet of the distribution head 11 is also communicated with one end of a gas cylinder liquid outlet pipe 5, and the other end of the gas cylinder liquid outlet pipe 5 is communicated with a gas supply system 3;
a pressurization pipeline three-way joint 13 is arranged at the lower part of the LNG vehicle-mounted bottle 1, a first port of the pressurization pipeline three-way joint 13 is communicated with the inside of the LNG vehicle-mounted bottle 1, a second port of the pressurization pipeline three-way joint 13 is communicated with one end of a self-pressurization pipeline 14 through a second economic valve 42 and a supercharger 15 in sequence, and the other end of the self-pressurization pipeline 14 is communicated with the inside of the LNG vehicle-mounted bottle 1 through a pressurization port of a distribution head 11; and a third port of the pressurization pipeline three-way joint 13 is communicated with a tank car safety valve 7 through a tank car connecting pipeline 6.
Gas supply system 3 includes vaporizer 31, buffer tank 32, stabiliser 33 and low pressure gas trip valve 34, the input and the gas cylinder drain pipe 5 of vaporizer 31 are linked together, the output of vaporizer 31 loops through buffer tank 32 and stabiliser 33 and is linked together with the input of low pressure gas trip valve 34, the output and the engine of low pressure gas trip valve 34 are linked together.
The mounting frame 2 is fixedly connected to a vehicle frame, the mounting frame 2 comprises a strap 21 and two L-shaped brackets 22 which are symmetrically arranged, and the bottoms of the two L-shaped brackets 22 are connected through a connecting plate 23;
the on-vehicle bottle of LNG 1 passes through strap 21 to be fixed on L shape support 22, the lateral part fixedly connected with buffer tank installing support 24 of connecting plate 23, buffer tank 32 fixed mounting is on buffer tank installing support 24, vaporizer 31 is fixed to be set up between two L shape supports 22, and vaporizer 31 is located between on-vehicle bottle of LNG 1 and buffer tank 32, keep away from fixedly connected with stabiliser support 25 on the L shape support 22 of distributor head 11, stabiliser support 25 is located the different sides of L shape support 22 stand respectively with on-vehicle bottle of LNG 1, stabiliser 33 and the equal fixed mounting of low pressure gas trip valve 34 are on stabiliser support 23.
The shock absorption cushion 8 comprises a rubber pad 81 and a metal bushing 82, the metal bushing 82 comprises an annular gasket 821 and a sleeve 822 which are integrated, the middle of the annular gasket 821 is vertically connected with the end of the sleeve 822, the rubber pad 81 is sleeved on the outer wall of the sleeve 822, the annular gasket 821 is in limit fit with one end of the rubber pad 81, the other end of the rubber pad 81 is a boss 83, and the boss 83 and the rubber pad 81 are integrated;
The metal bush 82 is internally provided with a connecting bolt 84, and a stud of the connecting bolt 84 is connected with the mounting frame 2 through a screw thread after sequentially passing through the voltage stabilizer bracket 25, the annular gasket 821, the sleeve 822, the rubber pad 81 and the boss 83.
And a second manual control valve 61 and a one-way valve 62 are sequentially arranged on the tank car connecting pipeline 6 from one end of the pressure increasing pipeline three-way joint 13 to one end of the tank car safety valve 7.
The set value of the opening pressure of the tank truck tank safety valve is 0.75Mpa, and the set value of the opening pressure of the second economic valve 42 is more than 0.7Mpa and less than the set value of the opening pressure of the tank truck tank safety valve.
The supercharger 15 is a self-supercharging finned tube.
The principle of the invention is illustrated as follows:
LNG (liquefied Natural gas) is liquefied Natural gas.
The first economic valve 41 and the second economic valve 42 are both low-temperature economic valves applied to an LNG automobile gas cylinder gas supply system, and are opening and closing pieces for an LNG vehicle-mounted tank.
The inside many pipelines that are equipped with of distributor head 11, wherein the liquid outlet of distributor head 11, the pressure boost mouth of distributor head 11 all are linked together with the inside of the on-vehicle bottle 1 of LNG.
When the integrated fuel supply device of the light loss LNG commercial vehicle works, liquefied natural gas flows out of the LNG vehicle-mounted bottle 1 through the liquid outlet of the distribution head 11, and then enters the engine for combustion after sequentially passing through the gas bottle liquid outlet pipe 5, the vaporizer 31, the buffer tank 32, the voltage stabilizer 33 and the low-pressure gas cut-off valve 34.
When partial liquefied natural gas in the LNG vehicle-mounted bottle 1 is evaporated to increase the pressure in the bottle body and exceed the set pressure of the first economic valve 41, the gaseous natural gas in the LNG vehicle-mounted bottle 1 flows out through the pressurization port of the distribution head 11, jacks the first economic valve 41, flows through the bypass pipeline 12, the gas bottle liquid outlet pipe 5 and the gas supply system 3 in sequence and enters the engine for combustion;
After the liquid LNG in the LNG tank car tank is evaporated into gaseous natural gas, the pressure in the tank car tank is increased to reach the opening pressure of the tank car tank safety valve, the gaseous natural gas in the tank car tank pushes the tank car tank safety valve 7 to sequentially flow through the pressurization pipeline three-way joint 13, the second economic valve 42, the supercharger 15 and the self-pressurization pipeline 14, and then flows into the LNG vehicle-mounted bottle 1 through the pressurization port of the distribution head 11 to be stored for use.
The check valve 62 only allows fuel to flow from the tanker tank to the LNG vehicle-mounted bottle 1, and prevents the fuel in the LNG vehicle-mounted bottle from flowing backwards into the tanker tank.
In case of failure of the non-return valve 62 or other emergency situations, the second manual valve 61 can be manually closed to avoid fuel leakage from the LNG vehicle bottle 1.
One end of the spare air port tee joint is communicated with one end of the first manual control valve, and the other end of the first manual control valve can be used as an auxiliary engine air intake and communicated with the spare air port tee joint to supply air for the auxiliary engine.
Example 1: the integrated fuel supply device of the light LNG commercial vehicle comprises an LNG vehicle-mounted bottle 1 and an installation frame 2, wherein the LNG vehicle-mounted bottle 1 is fixedly installed on the installation frame 2; the integrated fuel supply device of the light LNG commercial vehicle further comprises an air supply system 3, wherein the air supply system 3 is fixedly arranged on the installation frame 2; a distribution head 11 is arranged at the bottle mouth of the LNG vehicle-mounted bottle 1, a first economic valve 41 is arranged below the distribution head 11, one end of the first economic valve 41 is communicated with the inside of the LNG vehicle-mounted bottle 1 through a pressurization port of the distribution head 11, the other end of the first economic valve 41 is communicated with a liquid outlet of the distribution head 11 through a bypass pipeline 12, the liquid outlet of the distribution head 11 is also communicated with one end of a gas cylinder liquid outlet pipe 5, and the other end of the gas cylinder liquid outlet pipe 5 is communicated with a gas supply system 3;
A pressurization pipeline three-way joint 13 is arranged at the lower part of the LNG vehicle-mounted bottle 1, a first port of the pressurization pipeline three-way joint 13 is communicated with the inside of the LNG vehicle-mounted bottle 1, a second port of the pressurization pipeline three-way joint 13 is communicated with one end of a self-pressurization pipeline 14 through a second economic valve 42 and a supercharger 15 in sequence, and the other end of the self-pressurization pipeline 14 is communicated with the inside of the LNG vehicle-mounted bottle 1 through a pressurization port of a distribution head 11; and a third port of the pressurization pipeline three-way joint 13 is communicated with a tank car safety valve 7 through a tank car connecting pipeline 6.
Example 2:
example 2 is substantially the same as example 1 except that:
the gas supply system 3 comprises a vaporizer 31, a buffer tank 32, a pressure stabilizer 33 and a low-pressure gas cut-off valve 34, wherein the input end of the vaporizer 31 is communicated with a gas bottle liquid outlet pipe 5, the output end of the vaporizer 31 is communicated with the input end of the low-pressure gas cut-off valve 34 sequentially through the buffer tank 32 and the pressure stabilizer 33, and the output end of the low-pressure gas cut-off valve 34 is communicated with an engine; the mounting frame 2 is fixedly connected to a vehicle frame, the mounting frame 2 comprises a strap 21 and two L-shaped brackets 22 which are symmetrically arranged, and the bottoms of the two L-shaped brackets 22 are connected through a connecting plate 23; the LNG vehicle-mounted bottle 1 is fixed on an L-shaped support 22 through a strap 21, a buffer tank mounting support 24 is fixedly connected to the side portion of the connecting plate 23, a buffer tank 32 is fixedly mounted on the buffer tank mounting support 24, a vaporizer 31 is fixedly arranged between the two L-shaped supports 22, the vaporizer 31 is located between the LNG vehicle-mounted bottle 1 and the buffer tank 32, a stabilizer support 25 is fixedly connected to one L-shaped support 22 far away from the distribution head 11, the stabilizer support 25 and the LNG vehicle-mounted bottle 1 are respectively located on different sides of an upright column of the L-shaped support 22, and the stabilizer 33 and the low-pressure gas cut-off valve 34 are both fixedly mounted on the stabilizer support 23; a damping cushion 8 is arranged at the joint of the voltage stabilizer bracket 25 and the mounting frame 2, and the voltage stabilizer bracket 25 is fixedly connected with the mounting frame 2 through the damping cushion 8; the shock absorption cushion 8 comprises a rubber pad 81 and a metal bushing 82, the metal bushing 82 comprises an annular gasket 821 and a sleeve 822 which are integrated, the middle of the annular gasket 821 is vertically connected with the end of the sleeve 822, the rubber pad 81 is sleeved on the outer wall of the sleeve 822, the annular gasket 821 is in limit fit with one end of the rubber pad 81, the other end of the rubber pad 81 is a boss 83, and the boss 83 and the rubber pad 81 are integrated; the metal bush 82 is provided with a connecting bolt 84 inside, and a stud of the connecting bolt 84 is connected with the mounting frame 2 by a screw thread after passing through the stabilizer holder 25, the annular gasket 821, the sleeve 822 and the rubber pad 81 in sequence.
Example 3:
example 3 is substantially the same as example 2 except that:
Example 4:
example 4 is essentially the same as example 3, except that:
a second manual control valve 61 and a one-way valve 62 are sequentially arranged on the tank wagon connecting pipeline 6 from one end of the pressure increasing pipeline three-way joint 13 to one end of the tank wagon safety valve 7; the set value of the opening pressure of the tank truck tank safety valve is 0.75Mpa, and the set value of the opening pressure of the second economic valve 42 is more than 0.7Mpa and less than the set value of the opening pressure of the tank truck tank safety valve; the supercharger 15 is a self-supercharging finned tube.
Claims (8)
1. The utility model provides an integrated form fuel feeding device of light-duty LNG commercial vehicle, includes LNG on-vehicle bottle (1) and installation frame (2), install on installation frame (2) LNG on-vehicle bottle (1), its characterized in that:
The integrated fuel supply device of the light LNG commercial vehicle further comprises an air supply system (3), wherein the air supply system (3) is fixedly arranged on the installation frame (2);
a distribution head (11) is arranged at a bottle mouth of the LNG vehicle-mounted bottle (1), a first economic valve (41) is arranged below the distribution head (11), one end of the first economic valve (41) is communicated with the interior of the LNG vehicle-mounted bottle (1) through a pressurization port of the distribution head (11), the other end of the first economic valve (41) is communicated with a liquid outlet of the distribution head (11) through a bypass pipeline (12), the liquid outlet of the distribution head (11) is also communicated with one end of a gas bottle liquid outlet pipe (5), and the other end of the gas bottle liquid outlet pipe (5) is communicated with a gas supply system (3);
a pressurization pipeline tee joint (13) is arranged at the lower part of the LNG vehicle-mounted bottle (1), a first port of the pressurization pipeline tee joint (13) is communicated with the inside of the LNG vehicle-mounted bottle (1), a second port of the pressurization pipeline tee joint (13) is communicated with one end of a self-pressurization pipeline (14) sequentially through a second economic valve (42) and a supercharger (15), and the other end of the self-pressurization pipeline (14) is communicated with the inside of the LNG vehicle-mounted bottle (1) through a pressurization port of a distribution head (11); the third port of the pressurization pipeline tee joint (13) is communicated with a tank car safety valve (7) through a tank car connecting pipeline (6);
Gas supply system (3) include vaporizer (31), buffer tank (32), stabiliser (33) and low pressure gas trip valve (34), the input and gas cylinder drain pipe (5) of vaporizer (31) are linked together, the output of vaporizer (31) loops through buffer tank (32) and stabiliser (33) and the input of low pressure gas trip valve (34) is linked together, the output and the engine of low pressure gas trip valve (34) are linked together.
2. The integrated fuel supply apparatus for a light-duty LNG commercial vehicle according to claim 1, wherein:
the mounting frame (2) is fixedly connected to a frame, the mounting frame (2) comprises a strap (21) and two L-shaped supports (22) which are symmetrically arranged, and the bottoms of the two L-shaped supports (22) are connected through a connecting plate (23);
LNG on-vehicle bottle (1) is fixed on L shape support (22) through strap (21), lateral part fixedly connected with buffer tank installing support (24) of connecting plate (23), buffer tank (32) fixed mounting is on buffer tank installing support (24), vaporizer (31) are fixed to be set up between two L shape supports (22), and vaporizer (31) are located between LNG on-vehicle bottle (1) and buffer tank (32), fixedly connected with stabiliser support (25) on keeping away from an L shape support (22) of distributing head (11), stabiliser support (25) and LNG on-vehicle bottle (1) are located the different sides of L shape support (22) stand respectively, stabiliser (33) and the equal fixed mounting of low pressure gas trip valve (34) are on stabiliser support (25).
3. The integrated fuel supply apparatus for a light-duty LNG commercial vehicle as set forth in claim 2, wherein:
stabiliser support (25) and installation frame (2) junction are provided with damping cushion (8), stabiliser support (25) are through damping cushion (8) and installation frame (2) fixed connection.
4. The integrated fuel supply of a light-duty LNG commercial vehicle as set forth in claim 3, wherein:
the shock absorption cushion (8) comprises a rubber pad (81) and a metal bushing (82), the metal bushing (82) comprises an annular gasket (821) and a sleeve (822) which are of an integrated structure, the middle of the annular gasket (821) is vertically connected with the end of the sleeve (822), the rubber pad (81) is sleeved on the outer wall of the sleeve (822), the annular gasket (821) is in limit fit with one end of the rubber pad (81), a boss (83) is arranged at the other end of the rubber pad (81), and the boss (83) and the rubber pad (81) are integrally arranged;
the inner part of the metal bushing (82) is provided with a connecting bolt (84), and a stud of the connecting bolt (84) sequentially penetrates through the voltage stabilizer bracket (25), the annular gasket (821), the sleeve (822), the rubber pad (81) and the boss (83) and then is in threaded connection with the mounting frame (2).
5. The integrated fuel supply apparatus for a light-duty LNG commercial vehicle according to claim 2, 3 or 4, wherein:
buffer tank (32) are linked together through reserve gas port three-way joint (91) and stabiliser (33), the first port that reserve gas port three-way joint (91) passes through the output of connecting tube and buffer tank (32) and is linked together, and the second port that reserve gas port three-way joint (91) passes through the input of connecting tube and stabiliser (33) and is linked together, and the third port that reserve gas port three-way joint (91) is linked together with the one end of first manual valve (92), the other end of first manual valve (92) is reserve air intake.
6. The integrated fuel supply apparatus for a light-duty LNG commercial vehicle according to claim 5, wherein:
and a second manual control valve (61) and a one-way valve (62) are sequentially arranged from one end of the pressurization pipeline three-way joint (13) to one end of the tank car tank safety valve (7) on the tank car tank connecting pipeline (6).
7. The integrated fuel supply of a light-duty LNG commercial vehicle as set forth in claim 6, wherein:
the set value of the opening pressure of the tank truck tank safety valve is 0.75Mpa, and the set value of the opening pressure of the second economic valve (42) is more than 0.7Mpa and less than the set value of the opening pressure of the tank truck tank safety valve.
8. The integrated fuel supply apparatus for a light-duty LNG commercial vehicle according to claim 7, wherein:
the supercharger (15) is a self-supercharging finned tube.
Priority Applications (1)
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