WO2016045216A1

WO2016045216A1 - Integral dual-valve gas jet valve and assembly method thereof

Info

Publication number: WO2016045216A1
Application number: PCT/CN2014/094569
Authority: WO
Inventors: 王立峰; 吴龙龙
Original assignee: 王立峰
Priority date: 2014-09-23
Filing date: 2014-12-22
Publication date: 2016-03-31
Also published as: CN104197027B; CN104197027A

Abstract

Provided are an integral double-valve gas jet valve and assembly method thereof, the jet valve comprising a valve body (1), a valve element (2) installed inside the valve body, a front valve plate (3), a rear valve plate (4) and a moving armature (5) all arranged coaxially with the valve element, and an electromagnetic coil (6); a front valve plate hole (31) matching the front valve plate and a rear valve plate hole (41) matching the rear valve plate are provided inside the inner cavity of the valve body; the front valve plate and the rear valve plate are fixedly connected by a connecting rod (10) to form an integral structure that cannot be disassembled; the diameter of the front valve plate is less than the diameter of the rear valve plate, and is less than the inner diameter of the rear valve plate hole. The gas jet valve employs a simple integral dual-valve gas inlet structure having a large gas jet flux and a quick response and is easy to assemble, thus avoiding structural, technological, and sealing problems such as difficult assembly resulting from a combination dual-valve structure.

Description

Integral double valve gas injection valve and assembly method thereof

Technical field

The present invention relates to a gas injection valve, and more particularly to an integral two-valve gas injection valve and an assembly method therefor.

Background technique

The injection quantity and response time are two important parameters to measure the advantages and disadvantages of the gas injection valve. Due to the low density of the gas, the diameter of the valve required for the larger injection flow is larger, but the larger working pressure of the gas acts on On the valve, it will hinder the opening and closing movement of the valve and restrict the response time. Therefore, the electromagnetically driven high-speed electromagnetic gas injection valve can generally only adapt to small flow requirements and low gas pressure conditions, and cannot meet the high-speed quantitative injection under the requirements of large flow rate and high pressure.

The EGR valve produced by Delphi Company of the United States adopts balanced double-valve intake air. The diameters of the two valve plates are equal, and the combined force of the gas pressure on the valve core is zero. This structure can meet the requirements of high-flow high-speed solenoid valves. However, due to the technical limitations of processing and assembly, only the production process of split manufacturing and combined installation can be adopted. The two valve plates are separately manufactured, and they are assembled into one body by welding or press-fitting in the assembly process, and the structure is complicated. The process is poor and the sealing is difficult to guarantee.

Summary of the invention

The invention provides a large flow rate, a fast response speed and a simple structure for solving the above problems. Single, double-valve gas injection valve with good sealing, easy assembly and assembly method.

The technical solution adopted by the present invention to solve the technical problem is:

The integral two-valve gas injection valve of the present invention comprises a valve body, a valve core installed in the valve body, a front valve piece disposed coaxially with the valve core, a rear valve piece, a moving armature, an electromagnetic coil, the front valve piece and A connecting rod is disposed between the rear valve plates, the valve core is fixedly connected to the front end of the front valve piece, the movable armature is mounted at the rear end of the rear valve piece, and the electromagnetic coil is fixedly connected to the rear end of the valve body. The inner cavity of the valve body is provided with a front valve plate hole matching the front valve piece and a rear valve plate hole matching the rear valve piece, and the front valve piece and the rear valve piece are fixedly connected by a connecting rod into a non-detachable integral type. The structure has a diameter of the front valve sheet that is smaller than a diameter of the rear valve plate, and a diameter of the front valve plate is smaller than an inner diameter of the rear valve plate hole.

The front valve plate hole and the rear valve plate hole are respectively disposed on the front valve seat and the rear valve seat, and the front valve seat and the rear valve seat are installed in parallel with each other in the inner cavity of the valve body; a through hole and an air outlet hole are provided, the through hole communicates with the front and rear ends of the valve body, and the air outlet communicates with the inner cavity of the valve body between the front valve plate and the rear valve plate; The front end is fixedly coupled to the spring seat, and a return spring is disposed between the spring seat and the valve body.

The outer diameter of the front valve seat is smaller than the outer diameter of the rear valve seat.

A method of assembling an integral two-valve gas injection valve as described above, comprising the steps of sequentially performing:

Step A) preparing materials, preparing a valve body, a double valve assembly, a moving armature and an electromagnetic coil according to design requirements; the double valve assembly is integral with a front valve plate, a rear valve plate, a valve core and a connecting rod;

Step B) assembly of the double valve assembly, in the order of the valve core in the front and rear valve plates, Inserting the dual valve assembly into position from the rear end of the valve body cavity;

Step C) assembly of the moving armature, mounting the moving armature to the rear end of the rear valve piece;

Step D) Assembly of the electromagnetic coil, mounting the electromagnetic coil to the rear end of the valve body.

In the above assembling method of the integral two-valve gas injection valve, a valve seat assembly step is provided between step A) and step B), and the valve seat assembly step first feeds the front valve seat from the rear end of the valve body and Fixed in the design position, then the rear seat is fed from the rear end of the valve body and fixed in the design position.

Due to the above structure, the integral two-valve gas injection valve adopts an integrally formed double-valve intake structure, which has large gas injection flow rate, fast response speed, simple structure and easy assembly, and avoids assembly by the combined double valve structure. Difficult structural and processability, sealing problems, and the balance of the force exerted on the valve core by the air pressure, the high-speed response of the large-flow electromagnetic injection valve is realized, the manufacturing process is simple, and industrialization is easy.

DRAWINGS

1 is a schematic structural view of an embodiment of the present invention.

Figure 2 is a schematic view showing the assembled structure of the embodiment of Figure 1.

detailed description

As shown in FIG. 1, the integral two-valve gas injection valve of the present invention comprises a valve body 1, a valve core 2 installed in the valve body 1, a front valve plate 3 disposed coaxially with the valve core 2, and a rear valve. a piece 4 and a moving armature 5, an electromagnetic coil 6, a connecting rod 10 is disposed between the front valve piece 3 and the rear valve piece 4, and the valve core 2 is fixedly connected to the front end of the front valve piece 3, and the movable armature 5 Mounted at the rear end of the rear valve plate 4, the electromagnetic coil 6 is fixedly connected to the rear end of the valve body 1, and the inner valve cavity of the valve body 1 is provided with a front valve plate hole 31 matching the front valve plate 3 and after matching Behind the valve plate 4 Valve plate hole 41. In use, the suction force of the electromagnetic coil 6 drives the armature 5 and the front valve piece 3 and the rear valve piece 4 to move axially, thereby realizing the action of opening or closing the valve plate hole.

The front valve piece 3 and the rear valve piece 4 are fixedly connected by a connecting rod 10 into a non-detachable integral structure, and the integrated structure can be integrally formed during the production. The diameter of the front valve plate 3 is smaller than the diameter of the rear valve plate 4, and the diameter of the front valve plate 3 is smaller than the inner diameter of the rear valve plate hole 41, so that the front valve plate 3 can be mounted to the front valve plate through the rear valve plate hole 41. On the hole 31.

As an embodiment of the present invention, the front valve disc hole 31 and the rear valve disc hole 41 may be directly machined on the inner wall of the valve body 1, or may be as follows:

The front valve disc hole 31 and the rear valve disc hole 41 are disposed on the front valve seat 32 and the rear valve seat 42, and the outer diameter of the front valve seat 32 is smaller than the outer diameter of the rear valve seat 42. The front valve seat 32 and the rear valve seat 42 are mounted in parallel with each other in the inner cavity of the valve body 1.

In addition, the side wall of the valve body 1 is provided with a through hole 7 and an air outlet 81. The through hole 7 communicates with the front and rear ends of the valve body 1. The number of the through holes 7 can be set one or more according to design parameters. The cross-sectional shape of the through hole 7 may be a circular shape or a circular arc shape in order to increase the ventilation flow rate. The axis of the air outlet 81 is perpendicular to the axis of the valve body 1 and communicates with the inner cavity of the valve body 1 between the front valve plate 3 and the rear valve plate 4; through the front valve plate hole 31 and the rear valve plate hole 41 The gas is exhausted through the air outlet 81 to realize double valve large flow gas injection.

Of course, the front end of the valve body 2 is fixedly coupled to the spring seat 8, and a return spring 9 is disposed between the spring seat 8 and the valve body 1. The front end of the valve body 1 is also provided with a front end connected to the front valve plate hole 31. Air intake hole 91. The gas entering the intake port enters through the air inlet 91 on the one hand. The space in front of the front valve plate hole 31, on the other hand, enters the space behind the rear valve plate hole 41 through the through hole 7, and applies pressure to the front and rear, respectively, and once the corresponding valve piece is opened, the gas can pass through the front valve hole. 31 and the rear flap hole 41 simultaneously enter the intermediate cavity.

The thrust of the return spring 9 pushes the spool 2 and the front valve plate 3 and the rear valve plate 4 forward while canceling the pressure difference due to the difference in diameters of the front valve plate 3 and the rear valve plate 4, and the front valve plate hole 31 and The rear flap hole 41 is closed.

Step A) preparing materials, preparing a valve body 1, a double valve assembly, a moving armature 5 and an electromagnetic coil 6 according to design requirements; the double valve assembly is provided with a front valve plate 3, a rear valve plate 4, a valve core 2 and The whole of the connecting rod 10 can be integrated processing by integral processing, or can be separately processed and formed into a non-detachable unit by welding, riveting and the like.

Step B) assembly of the double valve assembly, according to the order of the valve core 2 in the rear of the front and rear valve plates 4, the double valve assembly is inserted into the position from the rear end of the inner cavity of the valve body 1; the front valve plate 3 and The rear valve plate 4 is in good cooperation with the front valve plate hole 31 and the rear valve plate hole 41, respectively.

Step C) The assembly of the moving armature mounts the moving armature 5 to the rear end of the rear valve plate 4.

Step D) Assembly of the electromagnetic coil, the electromagnetic coil 6 is attached to the rear end of the valve body 1.

When the valve plate hole is disposed on the independent valve seat, a valve seat assembly step is provided between step A) and step B), and the valve seat assembly step first sends the front valve seat 32 from the rear end of the valve body 1 It is inserted into and fixed at the design position, and then the rear valve seat 42 is fed from the rear end of the valve body 1 and fixed at the design position.

As shown in FIG. 1 and FIG. 2, in order to make the structure more reasonable, the valve casing 19 may be disposed at the front end of the valve body 1 and the return spring 9 . The front end of the valve casing 19 is provided with a gas inlet 20, and the valve casing 19 is provided. The rear end is fixed to the valve body 1 by a sealing ring. In the assembly process, the valve housing 19 can be installed first or last.

Claims

The integral two-valve gas injection valve comprises a valve body (1), a valve core (2) installed in the valve body (1), a front valve plate (3) coaxially arranged with the valve core (2), and a rear valve plate (4) and the moving armature (5), the electromagnetic coil (6), a connecting rod is arranged between the front valve piece (3) and the rear valve piece (4), and the valve core (2) is fixedly connected to the front valve a front end of the sheet (3), the movable armature (5) is mounted at a rear end of the rear valve piece (4), and the electromagnetic coil (6) is fixedly coupled to a rear end of the valve body (1), the valve body ( 1) The inner cavity is provided with a front valve plate hole (31) matching the front valve plate (3) and a rear valve plate hole (41) matching the rear valve plate (4), characterized in that the front valve plate ( 3) and the rear valve plate (4) is fixedly connected by a connecting rod (10) into a non-detachable monolithic structure, the diameter of the front valve plate (3) is smaller than the diameter of the rear valve plate (4), and the front valve plate The diameter of (3) is smaller than the inner diameter of the rear valve disc hole (41).
The integral two-valve gas injection valve according to claim 1, wherein said front valve disc hole (31) and rear valve disc hole (41) are respectively disposed at a front valve seat (32) and a rear valve seat ( 42) The front valve seat (32) and the rear valve seat (42) are mounted parallel to each other in the inner cavity of the valve body (1); the side wall of the valve body (1) is provided with a through hole (7) And an air outlet (81), the through hole (7) communicates with the front and rear ends of the valve body (1), and the air outlet (81) communicates with the front valve plate (3) and the rear valve plate (4) The inner cavity of the valve body (1); the front end of the valve core (2) is fixedly coupled to the spring seat (8), and a return spring is disposed between the spring seat (8) and the valve body (1) ( 9).
The integrated two-valve gas injection valve of claim 2 wherein said front valve seat (32) has an outer diameter that is less than an outer diameter of the rear valve seat (42).
A method of assembling an integral two-valve gas injection valve according to claim 1 or 2 or 3, comprising the steps of sequentially performing the following steps:

Step A) Preparing the material, preparing the valve body (1), the double valve assembly, the moving armature (5) and the electromagnetic coil (6) according to the design requirements; the double valve assembly is provided with the front valve piece (3), and the rear The valve plate (4), the valve core (2) and the connecting rod (10) as a whole;

Step B) assembly of the double valve assembly, according to the valve core (2) in the order of the front and rear valve plates (4), the double valve assembly is inserted into the position from the rear end of the inner cavity of the valve body (1);

Step C) assembly of the moving armature, mounting the moving armature (5) to the rear end of the rear valve piece (4);

Step D) Assembly of the electromagnetic coil, mounting the electromagnetic coil (6) to the rear end of the valve body (1).
The method of assembling an integral two-valve gas injection valve according to claim 4, wherein a valve seat assembly step is provided between step A) and step B), and the valve seat assembly step firstly positions the front valve seat ( 32) Feeded from the rear end of the valve body (1) and fixed at the design position, and then the rear valve seat (42) is fed from the rear end of the valve body (1) and fixed at the design position.