CN111120152A

CN111120152A - Adjustable gas jet pipe for internal combustion engine

Info

Publication number: CN111120152A
Application number: CN201911099751.2A
Authority: CN
Inventors: 李伟
Original assignee: Anqing CSSC Diesel Engine Co Ltd
Current assignee: Anqing CSSC Diesel Engine Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-05-08
Anticipated expiration: 2039-11-12
Also published as: CN111120152B

Abstract

The invention discloses an adjustable internal combustion engine gas injection pipe, which comprises a guide pipe, a nozzle and a conical flow divider positioned in the nozzle, wherein the inner diameter of the nozzle is gradually reduced from front to back, the back end of the nozzle is detachably connected with the guide pipe, the conical flow divider is movably connected with the inner wall of the nozzle, the front and back positions of the conical flow divider in the nozzle are adjustable, and when the conical flow divider moves back and forth in the nozzle, the area of an injection flow passage formed between the conical flow divider and the nozzle is changed. The invention has the advantages that the conical splitter is arranged in the gas injection pipe, so that the injected gas can be effectively diffused to the periphery, and the rapid and uniform mixing of the gas and the air is promoted; simultaneously, the front and back position of this toper shunt in the nozzle is adjustable to can adjust the gas jet flow speed of injection pipe, make the gas injection pipe can form the injection effect of the difference of power, increase its suitability.

Description

Adjustable gas jet pipe for internal combustion engine

Technical Field

The invention relates to the technical field of internal combustion engine equipment, in particular to an adjustable internal combustion engine gas injection pipe.

Background

With the increasing attention of people on preventing air pollution, the gas internal combustion engine is rapidly developed in recent years, the gas supply of large-scale medium and low speed engines mainly adopts an air inlet manifold injection mode, and an injection outlet of each cylinder needs to be provided with a gas injection pipe for guiding the gas injection direction. The cone-shaped splitter is arranged in the gas injection pipe used at present, so that sprayed gas can be effectively diffused all around, and the sprayed gas and air can be rapidly and uniformly mixed. However, the splitter has a drawback that the conical splitter is fixedly connected with the wall of the injection pipe, so that the flow area of the formed injection flow channel is fixed, and the gas injection flow speed of the injection pipe is not adjustable.

Disclosure of Invention

The invention aims to provide an adjustable internal combustion engine fuel gas injection pipe, which overcomes the defect that the fuel gas injection rate of the traditional injection pipe is not adjustable.

The invention realizes the purpose through the following technical scheme:

the utility model provides an adjustable internal-combustion engine gas injection pipe, the gas injection pipe includes pipe, nozzle and is located the toper shunt of nozzle, the internal diameter of nozzle reduces gradually from the past backward, and the rear end and the pipe detachable connection of nozzle, toper shunt and nozzle inner wall swing joint, the front and back position of toper shunt in the nozzle is adjustable, and when the toper shunt moved back and forth in the nozzle, the injection runner area that forms between toper shunt and the nozzle changed.

The further improvement is that the rear end of the nozzle is connected with the guide pipe through threads.

In a further refinement, the maximum outer diameter of the conical flow splitter is smaller than the minimum inner diameter of the nozzle.

The improved structure is characterized in that the conical flow divider is of an internal hollow structure, a stop dog is installed in the conical flow divider through a support rod, four side edges of the stop dog are provided with springs, an inserting plate is arranged at the outer end of each spring, annular grooves distributed at intervals are formed in the inner wall of the nozzle along the circumferential direction, and the inserting plate penetrates out of the conical flow divider under the elastic force action of the springs and then is inserted into one annular groove simultaneously to achieve movable connection of the conical flow divider and the nozzle.

The improved structure is characterized in that the cross section of the ring groove is triangular, the ring groove is internally composed of a first groove wall and a second groove wall, when the inserting plate is inserted into the ring groove, the front side surface of the inserting plate is in parallel and level contact with the first groove wall, and the end surface of the inserting plate is in parallel and level contact with the second groove wall.

In a further improvement, the included angle between the first slot wall and the second slot wall is 55-60 °.

The improved structure is characterized in that the gas injection pipe further comprises a mounting plate, and the mounting plate is arranged at the end of the guide pipe and used for fixing the guide pipe.

The invention has the beneficial effects that: the conical splitter is arranged in the gas injection pipe, so that the injected gas can be effectively diffused to the periphery, and the rapid and uniform mixing of the gas and air is promoted; simultaneously, the front and back position of this toper shunt in the nozzle is adjustable to can adjust the gas jet flow speed of injection pipe, make the gas injection pipe can form the injection effect of the difference of power, increase its suitability.

Drawings

FIG. 1 is a schematic view of an external structure of a gas injection pipe;

FIG. 2 is a schematic cross-sectional view of the front end of the gas injection lance;

FIG. 3 is a schematic cross-sectional view of a tapered flow diverter;

in the figure: 1. a conduit; 2. a nozzle; 3. a tapered flow splitter; 4. a support bar; 5. a stopper; 6. a spring; 7. inserting plates; 8. a ring groove; 81. a first slot wall; 82. a second slot wall; 9. and (7) mounting the plate.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Referring to fig. 1 to 3, an adjustable gas injection pipe for an internal combustion engine comprises a guide pipe 1, a nozzle 2 and a conical flow divider 3 located in the nozzle 2, wherein the inner diameter of the nozzle 2 is gradually reduced from front to back and is in a bell mouth shape, the rear end of the nozzle 2 is detachably connected with the guide pipe 1, the conical flow divider 3 is movably connected with the inner wall of the nozzle 2, the front and back positions of the conical flow divider 3 in the nozzle 2 are adjustable, and when the conical flow divider 3 moves back and forth in the nozzle 2, the area of an injection flow passage formed between the conical flow divider 3 and the nozzle 2 is changed. Specifically, when the conical flow divider 3 moves backwards in the nozzle 2, the inner diameter of the nozzle 2 corresponding to the most front position of the conical flow divider 3 becomes smaller, so that the flow area of the flow passage formed between the two becomes smaller, and the flow speed is increased; when the conical flow divider 3 is moved forward in the nozzle 2, the opposite is true, and the purpose of reducing the flow rate is achieved.

The rear end of the nozzle 2 is connected with the guide pipe 1 through threads, and the nozzle 2 can be detached from the guide pipe 1. And the maximum outer diameter of the conical flow divider 3 is smaller than the minimum inner diameter of the nozzle 2, so that after the nozzle 2 is detached from the conduit 1, the conical flow divider 3 can be moved backwards until it is withdrawn from the rear end of the nozzle 2.

Specifically, toper shunt 3 is inside hollow structure, installs dog 5 through bracing piece 4 in the inside of toper shunt 3, and four sides of dog 5 all are equipped with spring 6, and all are equipped with picture peg 7 in the outer end of every spring 6, and the inner wall of nozzle 2 is formed with annular 8 that a plurality of interval was arranged along the circumferencial direction, and picture peg 7 inserts an annular 8 simultaneously after wearing out toper shunt 3 under spring 6's elastic force effect in, realizes the swing joint of toper shunt 3 and nozzle 2. The cross section of the ring groove 8 is triangular, the ring groove 8 is internally composed of a first groove wall 81 and a second groove wall 82, the included angle between the first groove wall 81 and the second groove wall 82 is 55-60 degrees, when the inserting plate 7 is inserted into the ring groove 8, the front side surface of the inserting plate 7 is in flush contact with the first groove wall 81, and the end surface of the inserting plate 7 is in flush contact with the second groove wall 82.

When the inserting plate 7 is inserted into the ring groove 8, the conical flow divider 3 is pushed backwards, the inserting plate 7 is compressed by the extrusion effect of the second groove wall 82, the spring 6 is compressed, the inserting plate 7 can move, and after moving for a certain distance, the inserting plate 7 is inserted into the next ring groove 8, so that the position of the conical flow divider 3 can be adjusted. When the gas is injected, the front side surface of the inserting plate 7 is in flush contact with the first groove wall 81, so that the conical splitter 3 can be prevented from falling off under the impact of high-pressure airflow.

In addition, the gas injection pipe also comprises a mounting plate 9, the mounting plate 9 is arranged at the end of the guide pipe 1, and the mounting plate 9 is provided with a plurality of screw holes for fixing the guide pipe 1.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. An adjustable internal combustion engine gas injection pipe, the gas injection pipe comprises a guide pipe (1), a nozzle (2) and a conical flow divider (3) positioned in the nozzle (2), and is characterized in that: the inner diameter of the nozzle (2) is gradually reduced from front to back, the rear end of the nozzle (2) is detachably connected with the guide pipe (1), the conical flow divider (3) is movably connected with the inner wall of the nozzle (2), the front and back positions of the conical flow divider (3) in the nozzle (2) are adjustable, and when the conical flow divider (3) moves back and forth in the nozzle (2), the area of a spraying flow channel formed between the conical flow divider (3) and the nozzle (2) is changed.

2. The adjustable internal combustion engine gas injection pipe according to claim 1, wherein: the rear end of the nozzle (2) is connected with the guide pipe (1) through threads.

3. The adjustable internal combustion engine gas injection pipe according to claim 1, wherein: the maximum outer diameter of the conical flow divider (3) is smaller than the minimum inner diameter of the nozzle (2).

4. The adjustable internal combustion engine gas injection pipe according to claim 1, wherein: toper shunt (3) are inside hollow structure, install dog (5) through bracing piece (4) in the inside of toper shunt (3), four sides of dog (5) all are equipped with spring (6), and all are equipped with picture peg (7) in the outer end of every spring (6), the inner wall of nozzle (2) is formed with annular (8) that a plurality of interval was arranged along the circumferencial direction, picture peg (7) wear out behind toper shunt (3) under the elastic force effect of spring (6) insert one annular (8) simultaneously in, realize the swing joint of toper shunt (3) and nozzle (2).

5. The adjustable internal combustion engine gas injection pipe according to claim 4, wherein: the transversal triangle-shaped of personally submitting of annular (8), constitute by first cell wall (81) and second cell wall (82) in annular (8), and work as when picture peg (7) insert in annular (8), the leading flank and first cell wall (81) parallel and level contact of picture peg (7), the terminal surface and the second cell wall (82) parallel and level contact of picture peg (7).

6. The adjustable internal combustion engine gas injection pipe according to claim 5, wherein: the included angle between the first groove wall (81) and the second groove wall (82) is 55-60 degrees.

7. The adjustable internal combustion engine gas injection pipe according to claim 1, wherein: the gas injection pipe further comprises a mounting plate (9), wherein the mounting plate (9) is arranged at the end of the guide pipe (1) and used for fixing the guide pipe (1).