CN211623564U - High-pressure gas injection structure - Google Patents
High-pressure gas injection structure Download PDFInfo
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- CN211623564U CN211623564U CN202021854098.4U CN202021854098U CN211623564U CN 211623564 U CN211623564 U CN 211623564U CN 202021854098 U CN202021854098 U CN 202021854098U CN 211623564 U CN211623564 U CN 211623564U
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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
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Abstract
The utility model discloses a high pressure gas sprays structure, include: gas main, air inlet manifold, gas injection valve and connect in the gas injection pipe of gas injection valve, the air main of admitting air is connected with air intake manifold, gas injection valve fixed mounting in the gas main of admitting air, the gas injection pipe stretches into fixedly connected with gas nozzle can be dismantled to air intake manifold's one end, gas nozzle's tip is the toper, gas nozzle's tip apex department is equipped with the orifice, gas nozzle's tip be equipped with the toper air flue that the orifice is linked together. Because the spray hole is only provided with one spray hole, the end part of the spray nozzle is of a conical structure and is provided with a conical air passage, the fuel gas is high in spray pressure, the natural gas can be sprayed out in a foggy mode and is uniformly mixed with the air, the natural gas and the air are mixed and then enter each cylinder to be fully combusted, and the performance of the engine is improved.
Description
Technical Field
The utility model relates to an engine parts technical field, specific theory relates to a high pressure gas sprays structure.
Background
The gas engine air inlet mode has single-point injection and multi-point injection, and the single-point injection type natural gas engine is provided with a mixer in front of an air inlet main pipe, so that the gas and the air are fully mixed before entering the cylinder. The natural gas enters each cylinder of the engine after being mixed with the air in the air inlet channel, and because no mixer device exists in the process of entering the cylinder, the natural gas and the air are mixed unevenly, so that the normal combustion and the engine performance are influenced.
The Chinese utility model patent, publication number "CN 207145087U", is named "multiple spot injection formula natural gas engine gas injection conduit subassembly". The utility model discloses a utility model patent discloses: the side of the gas outlet end pipe body of the injection pipe 2 is provided with a plurality of injection holes 5, the plurality of injection holes 5 are uniformly distributed along the circumferential direction of the injection pipe 2, when the injection pipe is installed on an engine, the transition joint 1 is fixed on an air inlet manifold of a cylinder cover, the injection pipe 2 extends into an air passage of a cylinder, during injection, a plurality of natural gas strands are sprayed from the injection holes 5, and the natural gas and air are mixed and then enter the cylinder for combustion. The patent directly introduces natural gas to the inlet of the engine, namely the vicinity of an inlet valve, and simultaneously changes the injection hole of an injection conduit from a straight port into a plurality of side holes for injection on the basis. However, the injected natural gas is in a strand shape, so that the natural gas and the air cannot be sufficiently mixed, and the gas which is not sufficiently mixed causes the probability of in-cylinder misfire to be increased and the combustion efficiency to be lowered during combustion, thereby degrading the performance of the engine.
Disclosure of Invention
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: a high-pressure fuel gas injection structure is provided, which can uniformly mix natural gas and air to improve the performance of an engine.
In order to solve the technical problem, the technical scheme of the utility model is that:
a high-pressure gas injection structure comprising: gas main, air inlet manifold, gas injection valve and connect in the gas injection pipe of gas injection valve, the air main of admitting air is connected with air intake manifold, gas injection valve fixed mounting in the gas main of admitting air, the gas injection pipe stretches into fixedly connected with gas nozzle can be dismantled to air intake manifold's one end, gas nozzle's tip is the toper, gas nozzle's tip apex department is equipped with the orifice, gas nozzle's tip be equipped with the toper air flue that the orifice is linked together.
Preferably, the gas injection pipe comprises a corrugated pipe and a straight pipe which are connected, the straight pipe extends into the air intake manifold, the gas nozzle is detachably fixed to the straight pipe, the straight pipe is fixed to a first flange, and the first flange is fixed to the air intake manifold.
Preferably, the gas nozzle is screwed to the straight pipe.
Preferably, a sealing ring is arranged between the first flange and the air inlet manifold.
Preferably, the gas injection valve is fixedly connected with a second flange, and the corrugated pipe is fixed to the second flange.
Preferably, a sealing ring is arranged between the second flange and the gas injection valve.
Preferably, the gas injection valve is of a double-wall structure, the corrugated pipe is a double-wall corrugated pipe, the gas inlet main pipe is of a double-wall structure, a cavity between double-wall walls of the gas inlet main pipe is communicated with a cavity between double-wall walls of the gas injection valve, the first flange is provided with a first flange vent hole communicated with the cavity between the double-wall walls of the corrugated pipe, the second flange is provided with a second flange vent hole, and the second flange vent hole is communicated with the cavity between the double-wall walls of the corrugated pipe and the cavity between the double-wall walls of the gas injection valve.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because the spray hole is only provided with one spray hole, the end part of the spray nozzle is of a conical structure and is provided with a conical air passage, the fuel gas is high in spray pressure, the natural gas can be sprayed out in a foggy mode and is uniformly mixed with the air, the natural gas and the air are mixed and then enter each cylinder to be fully combusted, and the performance of the engine is improved.
The utility model discloses a high pressure gas injection structure can be different to the natural gas demand according to natural gas atmospheric pressure height, engine power size and engine speed height difference, and the gas nozzle and the relevant gas injection structures such as gas injection valve of the suitable model of selectable, gas nozzle adopt the threaded connection form, and the commonality is good, and convenient the dismantlement is changed.
The gas injection pipe adopts a corrugated pipe structure, mutual displacement between the gas injection valve and the air intake manifold is well adjusted, vibration is reduced, and the gas injection pipe has multiple advantages of fatigue resistance, high and low temperature resistance and the like. The traditional multi-point injection type natural gas engine adopts a hard conduit, and has no advantages and characteristics of the corrugated pipe.
Because gas injection valve, bellows and gas inlet manifold are double-walled structure, the cavity is sealed well between the double-walled pipe, and the cavity between the double-walled pipe has mobile air, when gas pipeline and high-pressure gas injection mechanism are sealed not tight and cause the gas to leak, the gas of leaking can get into the cavity between the double-walled pipe, is blown away by mobile air, guarantees that the gas of leaking in time discharges and can not get into the cabin, satisfies the requirement of essence safety department.
Drawings
FIG. 1 is a schematic structural view of a high-pressure fuel gas injection structure;
FIG. 2 is a schematic cross-sectional view of the gas injection tube of FIG. 1;
FIG. 3 is a cross-sectional structural schematic view of the gas burner of FIG. 1;
FIG. 4 is a schematic perspective view of the first flange of FIG. 1;
FIG. 5 is a perspective view of the second flange of FIG. 1;
in the figure: 1-an air intake manifold; 2-a gas inlet main pipe; 3-a gas injection valve; 4-a second flange; 41-a second flange vent hole, 5-a corrugated pipe; 6-a first flange; 61-first flange vent hole, 7-straight tube; 8-a gas nozzle; 81-jet holes and 9-air inlet manifold.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 3 together, a high-pressure gas injection structure includes: gas inlet manifold 2, air inlet manifold 1, gas injection valve 3 and connect in gas injection valve 3's gas injection pipe, air inlet manifold 1 is connected with air intake manifold 9, 3 fixed mounting in gas inlet manifold 2 of gas injection valve, fixedly connected with gas nozzle 8 can be dismantled to the one end that the gas injection pipe stretched into in the air intake manifold 9, gas nozzle 8's tip is the toper, gas nozzle 8's tip summit department is equipped with a orifice 81, gas nozzle 8's tip is equipped with the toper air flue, the toper air flue can further strengthen the injection pressure of gas.
As shown in fig. 2 and 4, the gas injection pipe comprises a corrugated pipe 5 and a straight pipe 7 which are connected, the straight pipe 7 extends into an air intake manifold 9, a gas nozzle 8 is connected to the straight pipe 7 in a threaded manner, the straight pipe 7 is integrally arranged on a first flange 6, the first flange 6 is fixed on the outer surface of the air intake manifold 9, and a sealing ring is arranged between the first flange 6 and the air intake manifold 9.
As shown in fig. 1 and 5, the gas injection valve 3 is fixedly connected to a second flange 4, and the bellows 5 is fixed to the second flange 4. A sealing ring is arranged between the second flange 4 and the fuel gas injection valve 3.
As shown in fig. 1, 4 and 5, the gas injection valve 3 is a double-wall structure, the corrugated pipe 5 is a double-wall corrugated pipe, the gas inlet manifold 2 is a double-wall structure, a cavity between the double-wall walls of the gas inlet manifold 2 is communicated with a cavity between the double-wall walls of the gas injection valve 3, the first flange 6 is provided with a first flange vent hole 61 communicated with the cavity between the double-wall walls of the double-wall corrugated pipe, and the second flange 4 is provided with a second flange vent hole 41 communicated with the cavity between the double-wall walls of the double-wall corrugated pipe and the cavity between the double-wall walls of the gas injection valve 3.
When the engine runs, air after pressurization and intercooling enters each air inlet manifold 9 after passing through the air inlet main pipe 1, high-pressure natural gas in the inner pipe of the gas inlet main pipe 2 enters a gas injection pipe after passing through the gas injection valve 3 along with the regular opening and closing of the gas injection valve 3 of each cylinder, the high-pressure natural gas is sprayed out from the spray holes 81 of the gas nozzle 8, as the spray holes 81 are only provided with one and the end part of the nozzle 8 is of a conical structure, the gas injection pressure is high, the natural gas can be sprayed out in a mist shape and is uniformly mixed with air, the mixed gas enters each cylinder for sufficient combustion, and the performance of the engine is improved.
The utility model discloses a high pressure gas injection structure can be different to the natural gas demand according to natural gas atmospheric pressure height, engine power size and the high difference of engine speed, and the gas nozzle 8 and the relevant gas injection structure such as gas injection valve 3 of the suitable model of selectable, gas nozzle 8 adopt the threaded connection form, and the commonality is good, and convenient the dismantlement is changed.
The gas injection pipe 5 adopts a corrugated pipe structure, so that mutual displacement between the gas injection valve 3 and the air intake manifold 9 is well adjusted, vibration is reduced, and the gas injection pipe has the advantages of fatigue resistance, high and low temperature resistance and the like. The conventional multi-point injection type natural gas engine adopts a hard conduit, and does not have the advantages and characteristics of the corrugated pipe 5.
Because gas injection valve 3, bellows 5 and gas inlet manifold 2 are double-walled structure, the cavity is sealed well between the double-walled pipe, and the cavity between the double-walled pipe has mobile air, when gas pipeline and high-pressure gas injection mechanism are sealed untight and cause the gas to leak, the gas of leaking can get into the cavity between the double-walled pipe, is blown away by mobile air, guarantees that the gas of leaking in time discharges and can not get into the cabin, satisfies the requirement that essence safety department was located.
The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.
Claims (7)
1. High pressure gas injection structure includes: gas main, air inlet manifold, gas injection valve and connect in the gas injection pipe of gas injection valve, the air main of admitting air is connected with air intake manifold, its characterized in that, gas injection valve fixed mounting in gas main, the gas injection pipe stretches into fixedly connected with gas nozzle can be dismantled to air intake manifold's one end, gas nozzle's tip is the toper, gas nozzle's tip apex department is equipped with the orifice, gas nozzle's tip be equipped with the toper air flue that the orifice is linked together.
2. The high-pressure gas injection structure according to claim 1, wherein the gas injection pipe includes a bellows and a straight pipe connected to each other, the straight pipe extending into the air intake manifold, the gas injection nozzle being detachably fixed to the straight pipe, the straight pipe being fixed to a first flange, the first flange being fixed to the air intake manifold.
3. The high-pressure gas injection structure as set forth in claim 2, wherein said gas injection nozzle is screw-coupled to said straight pipe.
4. The high pressure gas injection structure of claim 2, wherein a seal ring is provided between the first flange and the air intake manifold.
5. The high pressure gas injection structure of claim 2, wherein a second flange is fixedly connected to the gas injection valve, and the bellows is fixed to the second flange.
6. The high-pressure gas injection structure according to claim 5, wherein a seal ring is provided between the second flange and the gas injection valve.
7. The high pressure gas injection structure of claim 5, wherein said gas injection valve is a double wall structure, said bellows is a double wall bellows, said gas inlet manifold is a double wall structure, a cavity between double walls of said gas inlet manifold is in communication with a cavity between double walls of said gas injection valve, said first flange is provided with a first flange vent hole in communication with a cavity between double walls of said bellows, said second flange is provided with a second flange vent hole in communication with a cavity between double walls of said bellows and a cavity between double walls of said gas injection valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021854098.4U CN211623564U (en) | 2020-08-31 | 2020-08-31 | High-pressure gas injection structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021854098.4U CN211623564U (en) | 2020-08-31 | 2020-08-31 | High-pressure gas injection structure |
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| CN211623564U true CN211623564U (en) | 2020-10-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502863A (en) * | 2020-12-18 | 2021-03-16 | 中船动力有限公司 | Double-wall connecting pipe for fuel gas injection of dual-fuel diesel engine |
| CN113357055A (en) * | 2021-07-27 | 2021-09-07 | 淄柴机器有限公司 | Natural gas supply device for engine |
| CN113389660A (en) * | 2021-07-27 | 2021-09-14 | 淄柴机器有限公司 | Double-wall corrugated pipe for supplying natural gas to engine |
-
2020
- 2020-08-31 CN CN202021854098.4U patent/CN211623564U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502863A (en) * | 2020-12-18 | 2021-03-16 | 中船动力有限公司 | Double-wall connecting pipe for fuel gas injection of dual-fuel diesel engine |
| CN113357055A (en) * | 2021-07-27 | 2021-09-07 | 淄柴机器有限公司 | Natural gas supply device for engine |
| CN113389660A (en) * | 2021-07-27 | 2021-09-14 | 淄柴机器有限公司 | Double-wall corrugated pipe for supplying natural gas to engine |
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