CN113464319B

CN113464319B - Gas mixer structure

Info

Publication number: CN113464319B
Application number: CN202110964946.XA
Authority: CN
Inventors: 陈其安; 王学盛
Original assignee: Zhejiang Ruixing Electromechanical Technology Co ltd
Current assignee: Zhejiang Ruixing Electromechanical Technology Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2024-05-14
Anticipated expiration: 2041-08-23
Also published as: CN113464319A

Abstract

The invention discloses a gas mixer structure, wherein air enters a main channel through an air inlet, gas enters an arc-shaped pipe through an air inlet of the arc-shaped pipe and then enters the arc-shaped pipe to be mixed with the air entering the arc-shaped pipe, the gas can enter the arc-shaped pipe in a sheet shape along the square air inlet, and the arc-shaped pipe is provided with a first step part in addition to a second step part opposite to the first step part, when the air enters the arc-shaped pipe from the air inlet, the abrupt section change causes the air to form swirling flow at the first step part and the second step part, so that the gas exiting from the air inlet can be mixed with the air more uniformly under the action of swirling flow, the mixing efficiency and the effect are both obviously improved, the concentration control of the combustible gas is more stable, and the acceleration performance of an engine is further ensured.

Description

Gas mixer structure

Technical Field

The invention relates to the technical field of engines, in particular to a gas mixer structure.

Background

An engine using fuel gas as fuel has a specific air supply pipeline which basically comprises a pipeline for conveying the fuel gas, a pipeline for conveying air and a mixer, wherein the pipeline for conveying the fuel gas is connected with the pipeline for conveying the air, and the mixer is connected with the engine to form mixed gas which enters the engine.

The existing mixer is provided with an air inlet and a fuel gas inlet, fuel 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 fuel gas in the mixer, the mixing effect of the fuel gas is poor, particularly, in the acceleration process, the concentration control of the fuel gas is unstable, the poor acceleration performance of an engine is directly caused, and serious mechanical faults such as top melting and air inlet pipe explosion of an engine piston are directly caused seriously.

Disclosure of Invention

The invention aims to provide a gas mixer structure to solve the problem that the mixing effect of the gas is poor due to the mode that the gas and air of the existing gas mixer are mixed by means of simple diffusion of the gas in the gas mixer.

In order to solve the problems, the invention provides a gas mixer structure, which comprises a body and an arc-shaped pipe, wherein the body is provided with a gas inlet, an air inlet and a mixed gas outlet, the air inlet is communicated with the mixed gas outlet through a main channel, a valve plate with controllable opening is arranged in the gas inlet, a throttle valve with controllable opening is arranged in the main channel and close to the mixed gas outlet, the arc-shaped pipe is arranged in the main channel and coaxially arranged with the main channel, the peripheral wall of the arc-shaped pipe is provided 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-shaped pipe, 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 towards the inside of the arc-shaped pipe, the inner wall of the arc-shaped pipe 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 and the second 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-shaped 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 gradually increases along the direction from the air inlet groove to the air inlet, and the inner diameter of the second arc section gradually decreases along the direction from the air inlet groove to the gas mixture outlet.

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

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

Further, the valve block is rotationally connected with the body through the pivot, the cover is equipped with the second stopper in the pivot, the symmetry is equipped with two second fins on the second stopper, be equipped with the spacing boss of second on the body, the spacing boss of second is located on the rotation track of second fin.

The invention provides a gas mixer structure, which comprises a body and an arc tube, wherein air enters a main channel through an air inlet, gas enters the arc tube through an air inlet of the arc tube and is mixed with the air entering the arc tube, a throttle valve is used for controlling the gas quantity of the mixed gas entering a mixing chamber and then being output to an engine, the opening of a valve plate is used for controlling the gas quantity, the gas can enter the arc tube in a sheet shape along the square air inlet, under the action of the arc tube, the flow speed of the air is fast, the gas and the air can be quickly mixed, the mixing efficiency is improved, and due to the arc shape of the arc tube, the inner wall of the arc tube is provided with a first step part opposite to the first step part, and when the air enters the arc tube from the air inlet, the sudden section change of the air can form swirling flow at the first step part and the second step part, so that the gas from the air inlet can be mixed with the air more uniformly under the action of swirling flow, the mixing efficiency and the effect are obviously improved, and the performance of the engine can be controlled more stably.

Drawings

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

Fig. 2 is a schematic view of a gas blender in accordance with another embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of A-A in fig. 2.

Fig. 4 is a schematic sectional view of B-B in fig. 2.

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

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

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

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. the first limiting boss; 107. the second limiting 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 limiting block; 403. a first fin.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific 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, where the arc tube 2 is similar to a venturi tube, the body 1 is provided with a gas inlet 101, an air inlet 102 and a mixed gas outlet 103, the air inlet 102 is communicated with the mixed gas outlet 103 through a main channel 104, a valve plate 3 with controllable opening is provided in the gas inlet 101, a throttle valve 4 with controllable opening is provided in the main channel 104 near the mixed gas outlet 103, the arc tube 2 is disposed in the main channel 104 and coaxially arranged with the main channel 104, an arc ring groove 201 is formed on a peripheral wall of the arc tube 2, an air inlet groove 202 penetrating through an inner wall and an outer wall of the arc tube 2 is provided at a lowest point of the ring groove 201, 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 protruding radially toward an inner portion of the arc tube 2, an inner wall of the arc tube 2 is provided with a second step portion 204, and the second step portion 204 is opposite to the first step portion 203, and both are connected by the same plane.

Specifically, air enters the main channel 104 through the air inlet 102, fuel gas enters the arc-shaped pipe 2 through the air inlet 102, then enters the arc-shaped pipe 2 through the air inlet 202 of the arc-shaped pipe 2 to be mixed with the air entering the arc-shaped pipe 2, the throttle valve 4 is used for controlling the air quantity 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 air quantity of the fuel gas, the fuel gas can enter the arc-shaped pipe 2 in a sheet shape along the square air inlet 202 due to the square air inlet 202, under the action of the arc-shaped pipe 2, the air flow speed is fast, the fuel gas and the air can be quickly mixed, the mixing efficiency is improved, and due to the arc-shaped shape of the arc-shaped pipe 2, the inner wall of the arc-shaped pipe 2 is provided with a first step part 203 opposite to the first step part 203, and the sudden cross-sectional change of the air entering the arc-shaped pipe 2 from the air inlet 102 causes the air to form swirling flow at the first step part 203 and the second step part 204, so that the fuel gas exiting from the air inlet 202 can be mixed with the air under the swirling flow action, the mixing efficiency and the air mixing efficiency is improved, the combustion efficiency is remarkably improved, the combustion performance of the engine is remarkably controlled.

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

Preferably, the first step 203 and the second step 204 are straight-walled steps, and since the inner walls of the arced tube 2 are curved, the first step 203 and the second step 204 are straight-walled steps, so that the air transits from the curved surface to the plane, and thus the swirl flow can be better formed.

Further, the arc tube 2 includes 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 air-mixture outlet 103, and the variation of the cross section can be further increased by setting up the variation of different inner diameters of the first arc segment 205 and the second arc segment 206, so as to form swirling flow to ensure the sufficient and uniform mixing of the fuel gas and the air, and improve the mixing quality.

In this embodiment, a sealing ring 5 is disposed between the arc tube 2 and the body 1 to ensure sealing performance between the arc tube 2 and the body 1. Further, the arc tube 2 is mounted on the body 1, and the positioning boss 207 is arranged on the outer wall of the end part of the arc 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 assembly 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 mixed gas, the throttle valve 4 is rotationally connected with the 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 body 1, the first limiting boss 106 is positioned on the rotating track of the first fins 403, and when the throttle shaft 401 rotates to drive the throttle valve 4 to rotate, the two first fins 403 are respectively abutted with the first limiting boss 106 to realize limiting of the maximum opening position and the minimum opening position of the throttle valve 4, and it is noted that the throttle shaft 401 in the embodiment can be connected with a driving mechanism to automatically open and close, and the throttle valve can also be manually controlled. Similarly, the valve plate 3 is rotationally connected with the body 1 through the rotating shaft 301, the rotating shaft 301 is sleeved with a second limiting block 302, 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 the rotating track of the second fins 303, and limiting of the maximum opening and the minimum opening 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," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. The utility model provides a gas blender structure, its characterized in that includes body and arced tube, be equipped with gas entry, air inlet and gas mixture export on the body, the air inlet with the gas mixture export passes through main passageway intercommunication, be equipped with the valve block of controllable aperture in the gas entry, be close to in the main passageway gas mixture export department is equipped with the throttle valve of controllable aperture, arced tube locate in the main passageway and with main passageway coaxial arrangement, arced tube's week wall is formed with curved annular, the nadir department of annular is equipped with the square air inlet that runs through arced tube inner and outer wall, the gas entry with main passageway passes through the air inlet intercommunication, the air inlet has to the inside radial convex first step of arced tube, arced tube inner wall is equipped with the second step, the second step is relative with first step, and both are connected by the coplanar.

A sealing ring is arranged between the arc-shaped pipe and the body;

The first step part and the second step part are straight-wall steps;

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;

the fuel gas enters the arc-shaped pipe in a sheet shape along the square air inlet groove and is mixed with air under the swirling action.

2. The gas mixer arrangement of claim 1 wherein said arcuate tube includes a first arcuate segment adjacent said air inlet and having an inner diameter that gradually increases in a direction from said air inlet to said air inlet and a second arcuate segment having an inner diameter that gradually decreases in a direction from said air inlet to said mixture outlet.

3. The gas mixer structure as set forth in claim 2, wherein a positioning boss is provided on an outer wall of an end portion of the arc tube, and a positioning groove is provided on the body to match the positioning boss.

4. The gas mixer structure of claim 3, wherein the throttle valve is rotatably connected with the body through a throttle shaft, a first limiting block is sleeved on the throttle shaft, two first fins are symmetrically arranged on the first limiting block, a first limiting boss is arranged on the body, and the first limiting boss is located on a rotating track of the first fins.

5. The gas mixer structure of claim 4, wherein the valve plate 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 a rotating track of the second fins.