CN210770417U - Two-position three-way electromagnetic directional valve - Google Patents

Abstract

The utility model discloses a two-position three-way electromagnetic reversing valve, which comprises a valve body assembly, a valve core assembly and an electromagnetic assembly. The valve body assembly includes a valve body, a valve seat and a valve sleeve, and the electromagnetic assembly includes an electromagnetic coil, a static armature, Moving armature, valve core assembly includes push rod, ball and return spring; after being applied to the circuit, when the solenoid coil is powered off, the ball and the valve seat conical surface fit and seal, the medium working port on the valve seat and the medium of the valve sleeve The return port is connected; when the electromagnetic coil is energized, the push rod pushes the ball to make the ball and the cone surface of the valve sleeve fit and seal, and the medium working port on the valve seat is connected to the medium inlet port, realizing the change of the medium direction. Compared with the cylindrical slide valve and the gap sealing method, the utility model adopts a conical surface seal between the sphere and the conical surface, the medium is not easily leaked, the sealing pressure can be maintained, and the sealing is reliable; the structure is simple, and the processing precision requirement is reduced.

Description

Two-position three-way solenoid valve

technical field

The utility model relates to the technical field of valve components, in particular to a two-position three-way electromagnetic reversing valve.

Background technique

The reversing valve is the main element in the directional control loop. Among them, the electromagnetic reversing valve uses an electromagnet to push the valve core to control the on-off and change direction of the fluid, so it is easy to realize automation and remote control. It is the most widely used reversing valve. Due to the size and thrust of the electromagnet Limit, this valve is generally used to control small flow of fluid. Among them, the two-position three-way electromagnetic reversing valve is widely used in the control circuit. The two-position three-way electromagnetic reversing valve in the prior art generally adopts a cylindrical spool valve. It is easy to leak, resulting in unreliable sealing, complex structure, and high processing accuracy.

The same applicant's application number is 201911000047.7, an invention patent application entitled "Compression-release engine in-cylinder braking device", and an application number 201911000731.5, entitled "Compression-release engine in-cylinder braking device for oil boosting" For invention patent applications, all need to use two-position three-way electromagnetic reversing valve. The actual situation shows that when the two-position three-way electromagnetic directional valve with the above-mentioned existing structure is used, there are defects of leakage and unreliable sealing. Therefore, it is urgent to develop a two-position, three-way electromagnetic directional valve with reliable sealing and less leakage.

SUMMARY OF THE INVENTION

In view of this, the technical problem to be solved by the present invention is to provide a two-position three-way electromagnetic directional valve with reliable sealing and simple structure.

In order to solve the above technical problems, the technical solution of the present invention is: a two-position three-way electromagnetic directional valve, the two-position three-way electromagnetic directional valve includes a valve body assembly, and a valve body disposed in the valve cavity of the valve body assembly. a valve core assembly, an electromagnetic assembly that drives the movement of the valve core assembly,

The valve body assembly includes: a valve body, a valve seat, and a valve sleeve; one end of the valve seat is fixedly connected to the valve body, the other end of the valve seat is fixedly provided with the valve sleeve, and the valve seat A medium inlet port and a medium working port are provided which communicate with the valve cavity, the inside of the valve seat is provided with a valve seat conical surface, the inner port of the valve sleeve is provided with a valve sleeve conical surface, and the outer surface of the valve sleeve is provided with a valve sleeve conical surface. The port is the medium return port;

The electromagnetic assembly includes: an electromagnetic coil, a static armature, and a movable armature, the electromagnetic coil is sleeved on the outside of the valve body, the static armature is fixedly arranged in the valve cavity, and the movable armature can slide axially is arranged in the valve cavity and close to the static armature;

The valve core assembly includes: a push rod, a ball, and a return spring, the first end of the push rod is fixed with the movable armature, the push rod passes through the static armature, and the second end of the push rod abutting against the ball, the ball is arranged inside the valve seat, and the ball selectively forms a seal with the conical surface of the valve seat or the conical surface of the valve sleeve; the return spring is against between the ball and the outer end of the valve sleeve.

The push rod includes a push rod I section and a push rod II section that are coaxially arranged and fixedly connected, the push rod section I is a non-magnetic section, and the push rod section I corresponds to the position of the electromagnetic coil. , the push rod II section abuts against the sphere.

Wherein, the outer periphery of the push rod is provided with a push rod plane, the interior of the first section of the push rod is provided with a fluid channel, and the push rod plane and the fluid channel connect the medium inlet port and the two ends of the movable armature The fluid chambers communicate.

Wherein, the fluid channel includes an axial flow channel arranged along the axial direction of the push rod I section, and a radial flow channel arranged along the radial direction of the push rod section I and communicated with the axial flow channel .

Wherein, the push rod I section and the push rod section II are connected by studs; or, the push rod section I and the push rod section II are directly threadedly connected; or, the push rod section I and the push rod section I The second section of the push rod is directly connected by interference.

Wherein, the valve body includes a magnet conducting body I, a magnetic isolation ring, and a magnet conducting body II that are sequentially arranged and fixedly connected, one end of the valve seat is fixedly connected to the magnet conducting body II, and the end of the magnet conducting body I is provided with A limit plug, the movable armature is close to the limit plug.

Wherein, the limit plug is provided with a spring cavity, and an auxiliary spring is arranged in the spring cavity, one end of the auxiliary spring is pressed against the first end of the push rod, and the elastic force of the auxiliary spring is less than The elastic force of the return spring.

Wherein, the outer sleeve of the stop plug is provided with a compression nut, and the compression nut is connected with the external thread on the magnetic conductor 1.

After adopting the above-mentioned technical scheme, the beneficial effects of the present utility model are as follows:

Because the two-position three-way electromagnetic directional valve of the present invention includes a valve body assembly, a valve core assembly, and an electromagnetic assembly, the valve body assembly includes a valve body, a valve seat, and a valve sleeve, and the electromagnetic assembly includes an electromagnetic coil, a static armature, and a movable armature. The valve core assembly includes a push rod, a ball, and a return spring; after being applied to the circuit, when the electromagnetic coil is powered off, under the elastic force of the return spring, the ball and the conical surface of the valve seat are fitted and sealed, and the medium on the valve seat works. The port is connected to the medium return port of the valve sleeve; when the electromagnetic coil is energized, the movable armature drives the push rod to overcome the elastic force of the return spring to move toward the static armature, and the push rod pushes the ball to make the ball and the valve sleeve cone fit and seal, and the valve seat is on the valve seat. The medium working port is connected with the medium inlet port to realize the change of the medium direction. Compared with the cylindrical slide valve and the gap sealing method in the prior art, the utility model adopts the conical surface seal formed between the sphere and the conical surface, the medium is not easily leaked, the sealing pressure can be maintained, and the sealing is reliable; and the structure is simple, and the processing accuracy is required. reduce.

Description of drawings

Fig. 1 is the structural sectional schematic diagram of the embodiment of the present utility model;

Fig. 2 is the push rod structure schematic diagram in Fig. 1;

In the figure: 10-valve body; 101-magnetic conductor I; 102-magnetic isolation ring; 103-magnetic conductor II; 11-valve seat; 111-valve seat cone; 12-valve sleeve; 121-valve sleeve cone; 21-Push rod; 210-Push rod plane; 211-Push rod I section; 2111-Fluid channel; 212- Stud; 213-Push rod II section; 22- Ball; 31-electromagnetic coil; 32-static armature; 33-moving armature; 34-limiting plug; 35-pressing nut; P-media working port; A-media inlet port; B-media return port.

Detailed ways

Below in conjunction with the accompanying drawings and embodiments, the present utility model will be further detailed and non-limiting description.

It should be noted that, in this document, the center of the valve is defined as "inner", and the center far from the valve is defined as "outer"; terms such as "first" and "second" indicating sequences are only used for description purposes, and Not to be construed as indicating or implying relative importance; the terms "installed", "connected", "connected", etc. should be construed broadly, for example, may be a mechanical or electrical connection between elements; may be a direct connection between elements , and may also be indirectly connected through an intermediate medium, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

As shown in FIG. 1 , the two-position three-way electromagnetic directional valve according to the embodiment of the present invention includes a valve body assembly, a valve core assembly disposed in a valve cavity of the valve body assembly, and an electromagnetic assembly for driving the valve core assembly to move.

The valve body assembly includes: a valve body 10 , a valve seat 11 , and a valve sleeve 12 ; one end of the valve seat 11 is fixedly connected to the valve body 10 , and the other end of the valve seat 11 is fixedly provided with the valve sleeve 12 , the valve seat 11 A medium inlet port A and a medium working port P are provided which communicate with the valve cavity. The valve seat 11 is provided with a valve seat cone surface 111 inside, the inner port of the valve sleeve 12 is provided with a valve sleeve cone surface 121, and the outer port of the valve sleeve 12 is provided with a valve sleeve cone surface 121. It is the medium return port B. Further, the valve body 10 is a component structure. The valve body 10 includes a magnet conducting body I101, a magnetic isolation ring 102, and a magnet conducting body II103 that are sequentially arranged and fixedly connected. One end of the valve seat 11 extends into the magnet conducting body II103 and is connected with the magnet conducting body II103. Fixed connection.

The electromagnetic assembly includes: an electromagnetic coil 31, a static armature 32, and a movable armature 33. The electromagnetic coil 31 is sleeved on the outside of the valve body 10, the static armature 32 is fixedly arranged in the valve cavity, and the movable armature 33 is axially slidably arranged on Inside the valve cavity and close to the static armature 32 .

The valve core assembly includes: a push rod 21 , a ball 22 , a return spring 23 , and an auxiliary spring 24 further provided. The first end of the push rod 21 is fixed with the movable armature 33, the push rod 21 passes through the static armature 32, the second end of the push rod 21 abuts against the ball 22, the ball 22 is arranged inside the valve seat 11, and the ball 22 chooses one It forms a seal with the valve seat cone surface 111 or the valve sleeve cone surface 121 ; the return spring 23 abuts between the ball 22 and the outer end of the valve sleeve 12 .

The push rod 21 is an assembly structure, and the push rod 21 includes a push rod I section 211 and a push rod II section 213 that are coaxially arranged and fixedly connected. The push rod I section 211 is a non-magnetic section, for example, made of non-magnetic stainless steel. The push rod I section 211 corresponds to the position of the electromagnetic coil 31, which can prevent magnetic short circuit. The push rod II section 213 abuts against the ball 22 .

Wherein, the outer periphery of the push rod 21 is provided with several push rod planes 210, and the push rod planes 210 may be formed by milling. A fluid channel 2111 is provided inside the push rod I section 211. Specifically, the fluid channel 211 includes an axial flow channel disposed along the axial direction of the push rod I section 211, and is disposed along the radial direction of the push rod I section 211 and is connected to the shaft. Radial runners that communicate with the runners. The push rod plane 210 and the fluid channel 2111 connect the medium inlet A and the fluid chambers at both ends of the movable armature 33; on the one hand, it plays a role in pressure balance, so that the resultant force of the fluid pressure on the spool/moving armature is zero, which is convenient for movement; The function is: because the movable armature 33 is constantly moving, the size of the cavities at both ends of the movable armature 33 is constantly changing, and the fluid cavities at both ends are connected, so that the phenomenon of "breathing" and "blowing" will not occur.

Wherein, in this embodiment, the push rod I section 211 and the push rod II section 213 are connected through the stud 212 . Obviously, it is not limited to this, the push rod I section 211 and the push rod II section 213 may also be directly threadedly connected; or, the push rod I section 211 and the push rod II section 213 are directly connected by interference.

Among them, in order to limit the axial displacement of the movable armature 33, a limiting plug 34 is provided at the end of the magnetic conductor I101, and a compression nut 35 is sleeved outside the limiting plug 34, and the compression nut 35 is connected to the magnetic conductor. The external thread connection on I101, the movable armature 33 is close to the limit plug 34. Wherein, the limit plug 34 is provided with a spring cavity, the auxiliary spring 24 is arranged in the spring cavity, one end of the auxiliary spring 24 abuts against the end of the push rod I section 211, and the elastic force of the auxiliary spring 24 is far less than the return position. The elastic force of the spring 23 .

After the two-position three-way electromagnetic reversing valve of the embodiment of the present invention is applied to the circuit, when the electromagnetic coil 31 is powered off, under the elastic force of the return spring 23, the ball 22 and the valve seat conical surface 111 are fitted and sealed, and the valve The medium working port P on the seat 11 is connected to the medium return port B of the valve sleeve 12; when the electromagnetic coil 31 is energized, the movable armature 33 drives the push rod 21 to overcome the elastic force of the return spring 23 to move toward the static armature 32, and the push rod 21 pushes The sphere 22 makes the sphere 22 fit and seal with the conical surface 121 of the valve sleeve, and the medium working port P on the valve seat 11 is connected with the medium inlet port A, which realizes the change of the medium direction. Compared with the cylindrical slide valve and the gap sealing method in the prior art, the utility model adopts the conical surface seal formed between the sphere and the conical surface, the medium is not easily leaked, the sealing pressure can be maintained, and the sealing is reliable; and the structure is simple, and the processing accuracy is required. reduce.

The two-position three-way electromagnetic reversing valve of the embodiment of the present utility model is specifically applied to the invention patent application with the application number 201911000047.7 and the title of "compression-release engine in-cylinder braking device", and the application number of 201911000731.5 and the title of " When applying for the invention patent application of "compression-release engine in-cylinder brake device with oil pressurization", the medium inlet port A is connected to the oil circuit of the engine, the medium return port B is connected to the oil return circuit (pressure relief oil circuit), and the medium The working port P is connected to the oil circuit of the rotary oil inlet interface device.

Obviously, the two-position three-way electromagnetic reversing valve of the present invention is not limited to oil circuit reversing, but can also be used for gas circuit reversing. The medium inlet port A and the medium return port B can be interchanged, that is: the medium inlet port A is used as the medium return port, and the medium return port B is used as the medium inlet port, which is not limited here.

The above are examples of preferred embodiments of the present invention, and the parts that are not described in detail are known technologies of those skilled in the art. The protection scope of the present invention is subject to the content of the claims. Equivalent transformations based on technical inspiration are all within the protection scope of the present invention.

Claims (8)

1. A two-position three-way electromagnetic directional valve, the two-position three-way electromagnetic directional valve includes a valve body assembly, a valve core assembly disposed in the valve cavity of the valve body assembly, and a valve that drives the valve core assembly to move. Electromagnetic assembly, characterized in that, The valve body assembly includes: a valve body, a valve seat, and a valve sleeve; one end of the valve seat is fixedly connected to the valve body, the other end of the valve seat is fixedly provided with the valve sleeve, and the valve seat A medium inlet port and a medium working port are provided which communicate with the valve cavity, the inside of the valve seat is provided with a valve seat conical surface, the inner port of the valve sleeve is provided with a valve sleeve conical surface, and the outer surface of the valve sleeve is provided with a valve sleeve conical surface. The port is the medium return port; The electromagnetic assembly includes: an electromagnetic coil, a static armature, and a movable armature, the electromagnetic coil is sleeved on the outside of the valve body, the static armature is fixedly arranged in the valve cavity, and the movable armature can slide axially is arranged in the valve cavity and close to the static armature; The valve core assembly includes: a push rod, a ball, and a return spring, the first end of the push rod is fixed with the movable armature, the push rod passes through the static armature, and the second end of the push rod abutting against the ball, the ball is arranged inside the valve seat, and the ball selectively forms a seal with the conical surface of the valve seat or the conical surface of the valve sleeve; the return spring is against between the ball and the outer end of the valve sleeve. 2. The two-position three-way electromagnetic reversing valve of claim 1, wherein the push rod comprises a push rod I section and a push rod II section that are coaxially arranged and fixedly connected, and the push rod I The segment I is a non-magnetic segment, the segment I of the push rod corresponds to the position of the electromagnetic coil, and the segment II of the push rod abuts against the sphere. 3. The two-position three-way electromagnetic reversing valve as claimed in claim 2, wherein the outer periphery of the push rod is provided with a push rod plane, the interior of the push rod I section is provided with a fluid channel, and the push rod is provided with a fluid channel. The rod plane and the fluid channel communicate the medium inlet port and the fluid chambers at both ends of the movable armature. 4. The two-position, three-way electromagnetic reversing valve according to claim 3, wherein the fluid passage comprises an axial flow passage arranged along the axial direction of the push rod I section, and along the push rod The radial flow channel of the I segment is arranged radially and communicates with the axial flow channel. 5. The two-position three-way electromagnetic reversing valve according to claim 2, wherein the push rod I section and the push rod II section are connected by a stud; The second section of the push rod is directly threadedly connected; or, the section I of the push rod and the second section of the push rod are directly connected by interference. 6. The two-position three-way electromagnetic reversing valve according to claim 1, wherein the valve body comprises a magnetic conductor I, a magnetic isolation ring, and a magnetic conductor II which are arranged and fixedly connected in sequence, and the valve seat One end of the magnetizer II is fixedly connected to the magnetizer II, the end of the magnetizer I is provided with a limit plug, and the movable armature is close to the limit plug. 7 . The two-position three-way electromagnetic reversing valve according to claim 6 , wherein the limiting plug is provided with a spring cavity, an auxiliary spring is disposed in the spring cavity, and one end of the auxiliary spring Relying on the first end of the push rod, the elastic force of the auxiliary spring is smaller than the elastic force of the return spring. 8. The two-position three-way electromagnetic reversing valve as claimed in claim 6, wherein the outer sleeve of the limiting plug is provided with a compression nut, and the compression nut and the magnetic conductor I on the external thread connection.

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