CN215292716U

CN215292716U - Gas mixer structure

Info

Publication number: CN215292716U
Application number: CN202121975954.6U
Authority: CN
Inventors: 陈其安; 王学盛
Original assignee: Qi An Chen
Current assignee: Qi An Chen
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2021-12-24
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses a gas mixer structure, air enters a main channel through an air inlet, the fuel gas enters from the fuel gas inlet, then enters the arc-shaped pipe through the air inlet groove of the arc-shaped pipe and is mixed with the air entering the arc-shaped pipe, because the air inlet groove is a square groove, the fuel gas can enter the arc-shaped pipe along the square air inlet groove in a sheet shape, and moreover, because the arc-shaped pipe has the arc shape and the air inlet groove is provided with the first step part, the inner wall of the arc-shaped pipe is provided with the second step part opposite to the first step part, the abrupt cross-sectional change when the air enters the arc tube from the air inlet causes the air to form a swirling flow at the first step portion and the second step portion, so, the gas that comes out from the air inlet duct can be more even with the air mixing ground under the vortex effect, and mixing efficiency and effect all have showing and improve, and combustible gas's concentration control is more stable, and then guarantees the acceleration performance of engine.

Description

Gas mixer structure

Technical Field

The utility model relates to a technical field of engine especially relates to a gas mixer structure.

Background

The engine using gas as fuel has a special gas supply pipeline which basically comprises a pipeline for conveying gas, a pipeline for conveying air and a mixer, wherein the pipeline for conveying gas and the pipeline for conveying air are connected with the mixer, and the mixer is connected with the engine to form mixed gas to enter the engine.

The existing mixer is provided with an air inlet and a gas inlet, gas and air are mixed at a valve plate of the mixer, the mixing mode is realized by the diffusion of the air and the gas in the mixer, the gas mixing effect is poor, especially in the accelerating process, the concentration control of combustible gas is unstable, the accelerating performance of an engine is poor directly, and serious mechanical faults such as top melting of an engine piston, burst of an air inlet pipe and the like are caused directly seriously.

Disclosure of Invention

The utility model aims at providing a gas mixer structure to the gas and the air of solving current gas mixer rely on gaseous simple diffusion in its inside to realize mixing, and this kind of mode leads to the problem that the mixed effect of gas is not good.

In order to solve the above problems, the present invention provides a gas mixer structure, comprising a body and an arc tube, wherein the body is provided with a gas inlet, an air inlet and a mixture outlet, the air inlet is communicated with the mixture outlet through a main channel, the gas inlet is provided with a valve sheet with controllable opening, the main channel is provided with a throttle valve with controllable opening near the mixture outlet, the arc tube is arranged in the main channel and is coaxial with the main channel, the peripheral wall of the arc tube is formed with an arc-shaped annular groove, the lowest point of the annular groove is provided with a square air inlet groove penetrating through the inner wall and the outer wall of the arc tube, the gas inlet is communicated with the main channel through the air inlet groove, the air inlet groove has a first step part protruding radially towards the inner part of the arc tube, the inner wall of the arc tube is provided with a second step part, the second step part is opposite to the first step part, and the second step part and the first step part are connected by the same plane.

Further, the first step portion and the second step portion are both straight-wall steps.

Further, the arc pipe comprises a first arc section and a second arc section, the first arc section is close to the air inlet, the inner diameter of the first arc section is gradually increased along the direction from the air inlet groove to the air inlet, and the inner diameter of the second arc section is gradually decreased along the direction from the air inlet groove to the mixed gas outlet.

Further, a sealing ring is arranged between the arc-shaped pipe and the body.

Furthermore, a positioning boss is arranged on the outer wall of the end part of the arc-shaped pipe, and a positioning groove matched with the positioning boss is arranged on the body.

Further, the throttle valve pass through the throttle valve axle with the body rotates and connects, the epaxial cover of throttle valve is equipped with first stopper, the symmetry is equipped with two first fins on the first stopper, be equipped with first spacing boss on the body, first spacing boss is located on the rotatory orbit of first fin.

Further, the valve block is rotatably connected with the body through a rotating shaft, a second limiting block is sleeved on the rotating shaft, two second fins are symmetrically arranged on the second limiting block, a second limiting boss is arranged on the body, and the second limiting boss is located on the rotating track of the second fins.

The utility model provides a gas mixer structure, including body and arc pipe, the air gets into the main entrance through air inlet, the gas gets into from the gas entry, then get into in the arc pipe through the air inlet duct of arc pipe and realize mixing with the air that here got into, the air throttle is used for controlling the gas mixture and gets into the mixing chamber and then export the tolerance for the engine, the aperture of valve block is used for controlling the input of gas, because the air inlet duct is square groove, the gas can be along square air inlet duct in the arc pipe is the slice entering, under the effect of arc pipe, the velocity of flow of air is very fast, can make gas and air quick mixture, improve mixing efficiency, and, because the arc shape of arc pipe itself, in addition, have first step portion at the air inlet duct, the inner wall of arc pipe has the second step portion relative with first step portion, when the air from air inlet duct entering arc pipe sudden cross-section change make the air can form swirling flow in first step portion and second step portion, so, the gas that comes out from the air inlet duct can be more even with the air mixing ground under the vortex effect, and mixing efficiency and effect all have showing and improve, and combustible gas's concentration control is more stable, and then guarantees the acceleration performance of engine.

Drawings

Fig. 1 is a schematic structural diagram of a gas mixer structure in an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another view angle of the gas mixer structure in the embodiment of the present invention.

Fig. 3 is a schematic sectional view taken along line a-a in fig. 2.

Fig. 4 is a schematic sectional view taken along line B-B in fig. 2.

Fig. 5 is a schematic structural diagram of a gas mixer structure in an embodiment of the present invention.

Fig. 6 is a schematic structural view of the arc tube of the gas mixer structure in the embodiment of the present invention.

Fig. 7 is a partial enlarged view of fig. 4 at C.

In the figure, 1, a body; 2. an arc tube; 3. a valve plate; 4. a throttle valve; 5. a seal ring; 101. a gas inlet; 102. an air inlet; 103. a mixed gas outlet; 104. a main channel; 105. a positioning groove; 106. a first limit boss; 107. a second limit boss; 201. a ring groove; 202. an air inlet groove; 203. a first step portion; 204. a second step portion; 205. a first arc segment; 206. a second arc segment; 207. positioning the boss; 301. a rotating shaft; 302. a second limiting block; 303. a second fin; 401. a throttle shaft; 402. a first stopper; 403. a first fin.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Referring to fig. 1 to 6, a gas mixer structure according to an embodiment of the present invention is schematically shown, including a body 1 and an arc tube 2, the arc tube 2 in this embodiment is similar to a venturi tube, the body 1 is provided with a gas inlet 101, an air inlet 102 and a mixture outlet 103, the air inlet 102 is communicated with the mixture outlet 103 through a main channel 104, the gas inlet 101 is provided with a valve plate 3 with controllable opening, the main channel 104 is provided with a throttle valve 4 with controllable opening near the mixture outlet 103, the arc tube 2 is provided in the main channel 104 and is coaxially arranged with the main channel 104, a circumferential wall of the arc tube 2 is formed with an arc-shaped ring groove 201, the lowest point of the ring groove 201 is provided with an air inlet groove 202 penetrating through inner and outer walls of the arc tube 2, the gas inlet 101 is communicated with the main channel 104 through the air inlet groove 202, the air inlet groove 202 has a first step portion 203 radially protruding toward the inside of the arc tube 2, the inner wall of the arc-shaped pipe 2 is provided with a second step part 204, the second step part 204 is opposite to the first step part 203, and the two are connected by the same plane.

Specifically, air enters the main channel 104 through the air inlet 102, gas enters from the gas inlet 101, then enters the arc-shaped pipe 2 through the air inlet groove 202 of the arc-shaped pipe 2 to be mixed with the air entering at the position, the throttle valve 4 is used for controlling the amount of air of the mixed gas entering the mixing chamber and then being output to the engine, the opening degree of the valve plate 3 is used for controlling the entering amount of the gas, as the air inlet groove 202 is a square groove, the gas can enter the arc-shaped pipe 2 along the square air inlet groove 202 in a sheet shape, under the action of the arc-shaped pipe 2, the flow rate of the air is fast, the gas and the air can be rapidly mixed, the mixing efficiency is improved, moreover, as the arc shape of the arc-shaped pipe 2 is provided with a first step part 203 in the air inlet groove 202, the inner wall of the arc-shaped pipe 2 is provided with a second step part 204 opposite to the first step part 203, when the air enters the arc-shaped pipe 2 from the air inlet 102, the sudden section change causes the air to form a flow at the first step part 203 and the second step part 204, therefore, the fuel gas coming out of the air inlet groove 202 can be mixed with the air more uniformly under the swirling flow effect, the mixing efficiency and the effect are obviously improved, the concentration control of the combustible gas is more stable, and the acceleration performance of the engine is further ensured.

In this embodiment, only one air inlet groove 202 is formed in the arc tube 2, so that the processing time of the arc tube 2 can be saved.

Preferably, the first step portion 203 and the second step portion 204 are both straight wall steps, and since the inner wall of the arc tube 2 is curved, the first step portion 203 and the second step portion 204 are set to be straight wall steps, so that the air is transited from a curved surface to a plane, and the swirl airflow can be better formed.

Further, the arc-shaped pipe 2 comprises a first arc segment 205 and a second arc segment 206, the first arc segment 205 is close to the air inlet 102, the inner diameter of the first arc segment 205 is gradually increased along the direction from the air inlet 202 to the air inlet 102, the inner diameter of the second arc segment 206 is gradually decreased along the direction from the air inlet 202 to the mixed gas outlet 103, the change of the cross section can be further increased through setting different inner diameter changes of the first arc segment 205 and the second arc segment 206, and then swirling flow is formed to ensure the sufficient and uniform mixing of the fuel gas and the air, and the mixing quality is improved.

In this embodiment, a sealing ring 5 is disposed between the arc tube 2 and the body 1 to ensure the sealing performance between the arc tube 2 and the body 1. Further, the arced tube 2 is installed on the body 1, and the positioning boss 207 is arranged on the outer wall of the end part of the arced tube 2, and the positioning groove 105 matched with the positioning boss 207 is arranged on the body 1, so that the accuracy of the assembling position is ensured.

In order to control the limit position of the opening of the throttle valve 4, so as to better control the intake of the air mixture, the throttle valve 4 is rotatably connected with the main body 1 through a throttle shaft 401, a first limiting block 402 is sleeved on the throttle shaft 401, two first fins 403 are symmetrically arranged on the first limiting block 402, a first limiting boss 106 is arranged on the main body 1, the first limiting boss 106 is located on the rotating track of the first fin 403, when the throttle shaft 401 rotates to drive the throttle valve 4 to rotate, the two first fins 403 are respectively abutted to the first limiting boss 106 to limit the maximum opening position and the minimum opening position of the throttle valve 4, it should be noted that the throttle shaft 401 in this embodiment can be connected with a driving mechanism to automatically open and close, and can also be manually controlled. Similarly, the valve plate 3 is rotatably connected with the body 1 through a rotating shaft 301, a second limiting block 302 is sleeved on the rotating shaft 301, two second fins 303 are symmetrically arranged on the second limiting block 302, a second limiting boss 107 is arranged on the body 1, the second limiting boss 107 is located on a rotating track of the second fins 303, and limitation of the maximum opening degree and the minimum opening degree of the valve plate 3 is achieved through the second limiting boss 107 and the two second fins 303.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A gas mixer structure is characterized by comprising a body and an arc-shaped pipe, wherein a gas inlet, an air inlet and a mixed gas outlet are arranged on the body, the air inlet is communicated with the mixed gas outlet through a main channel, a valve block with controllable opening degree is arranged in the gas inlet, a throttle valve with controllable opening degree is arranged in the main channel and close to the mixed gas outlet, the arc-shaped pipe is arranged in the main channel and is coaxially arranged with the main channel, an arc-shaped annular groove is formed on the peripheral wall of the arc-shaped pipe, a square air inlet groove penetrating through the inner wall and the outer wall of the arc-shaped pipe is arranged at the lowest point of the annular groove, the gas inlet is communicated with the main channel through the air inlet groove, the air inlet groove is provided with a first step part protruding radially inside the arc-shaped pipe, a second step part is arranged on the inner wall of the arc-shaped pipe, and is opposite to the first step part, and the two are connected by the same plane.

2. The gas mixer structure of claim 1, wherein the first step portion and the second step portion are both straight-walled steps.

3. The gas mixer structure according to claim 1, wherein said curved pipe includes a first curved section and a second curved section, said first curved section being adjacent to said air inlet and having an inner diameter that gradually increases in a direction from said air inlet to said air inlet, said second curved section having an inner diameter that gradually decreases in a direction from said air inlet to said mixture outlet.

4. The gas mixer arrangement of claim 1, wherein a seal ring is disposed between said arced tube and said body.

5. The gas mixer structure of claim 4, wherein the outer wall of the end of the arc-shaped pipe is provided with a positioning boss, and the body is provided with a positioning groove matched with the positioning boss.

6. The gas mixer structure as claimed in claim 5, wherein the throttle valve is rotatably connected to the body through a throttle shaft, the throttle shaft is sleeved with a first limiting block, the first limiting block is symmetrically provided with two first fins, the body is provided with a first limiting boss, and the first limiting boss is located on a rotation track of the first fins.

7. The gas mixer structure of claim 6, wherein the valve plate is rotatably connected to the body through a rotating shaft, a second limiting block is sleeved on the rotating shaft, two second fins are symmetrically arranged on the second limiting block, and a second limiting boss is arranged on the body and located on a rotating track of the second fins.