CN115614507A

CN115614507A - High-speed switch valve

Info

Publication number: CN115614507A
Application number: CN202211227707.7A
Authority: CN
Inventors: 吴会刚; 韦文术; 徐龙; 王志民; 万新成
Original assignee: Beijing Meike Tianma Automation Technology Co Ltd; Beijing Tianma Intelligent Control Technology Co Ltd
Current assignee: Beijing Meike Tianma Automation Technology Co Ltd; Beijing Tianma Intelligent Control Technology Co Ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-01-17

Abstract

The invention discloses a high-speed switch valve which comprises a yoke, a coil, an armature, an elastic element, a valve body and a valve core, wherein the coil extends along the circumferential direction of part of the yoke in a closed manner so as to be suitable for generating a magnetic field; the elastic piece is coaxially arranged with the coil, part of the elastic piece is sleeved on the outer peripheral side of the yoke, and the elastic piece can stretch and retract along the axial direction of the elastic piece so as to push the armature to reset after the coil is powered off; the valve body is provided with a first port and a second port, the valve core is arranged on the valve body and can move relative to the valve body under the driving of the armature iron so as to control the on-off of the first port and the second port. The high-speed switch valve provided by the embodiment of the invention has the advantage of high response speed.

Description

High-speed switch valve

Technical Field

The invention relates to the technical field of fluid valves, in particular to a high-speed switch valve.

Background

The electromagnetic switch valve adopts the electromagnet assembly to drive the valve core to move in the valve body, so that the communication of different valve ports of the valve body is realized, the fluid is controlled to flow between the different valve ports, the switching function is realized, the on-off of a fluid passage is controlled, and the response speed of the switch valve in the related technology is lower.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

in the electromagnetic valve in the related art, the solenoid type electromagnet is adopted to drive the valve core to move, and the cylindrical spiral elastic piece is adopted to drive the valve core to reset, so that the acting force on the valve core is smaller while the occupied space is larger, and the response speed of the valve core is reduced;

the coil of the solenoid valve in the related art generates a magnetic field, and the valve element is driven to move after the yoke iron collects magnetic induction lines, but the solenoid valve in the related art has large magnetic loss, so that the driving acting force on the valve element is small, and the response speed of the valve element is low.

The present invention is directed to solving, at least in part, one of the technical problems in the related art. To this end, embodiments of the present invention propose a high-speed switching valve having an advantage of high response speed.

The high-speed switch valve comprises a yoke, a coil and an armature, wherein the coil extends along part of the circumferential direction of the yoke in a closed manner and is suitable for generating a magnetic field, and the armature is arranged on one side of the yoke in the axial direction and is suitable for attracting the yoke when the coil generates the magnetic field; the elastic piece is coaxially arranged with the coil, part of the elastic piece is sleeved on the outer peripheral side of the yoke iron, and the elastic piece can stretch and retract along the axial direction of the elastic piece so as to push the armature iron to reset after the coil is powered off; the valve body is provided with a first port and a second port, the valve core is arranged on the valve body and can move relative to the valve body under the driving of the armature iron so as to control the on-off of the first port and the second port.

The high-speed switch valve provided by the embodiment of the invention has the advantage of high response speed.

In some embodiments, the armature is provided with an annular groove opening towards the coil, the annular groove extending coaxially with the elastic member, part of the elastic member fitting within the annular groove.

In some embodiments, the yoke includes a central portion and an annular portion, the coil is disposed on an outer peripheral side of the central portion, the annular portion is disposed on an outer peripheral side of the coil and extends in a closed manner in an axial direction of the coil, and an end of the annular portion facing away from the armature is connected to an end of the central portion facing away from the armature.

In some embodiments, when the coil is energized, a portion of the armature engages the annular portion and a portion of the armature engages the central portion.

In some embodiments, the high-speed switching valve includes a stopper disposed between the central portion and the annular portion, and the stopper is disposed between the coil and the elastic member to be adapted to block the elastic member.

In some embodiments, the shield is sealingly connected to the yoke to isolate the coil from a side of the yoke facing the armature.

In some embodiments, the valve body is provided with a first annular wall at an end facing the yoke, the armature is fitted in the first annular wall, the yoke is provided with a second annular wall at an end facing the valve body, and the first annular wall is fitted in the second annular wall in a sealing manner.

In some embodiments, the high-speed switch valve includes a slider, the slider is disposed on the valve body and slides in a sealing manner along an axial direction of the valve body, one end of the slider is connected to the armature, when the coil is energized, a space is provided between the slider and the valve core to communicate the first port and the second port, and when the coil is de-energized, the armature resets to enable the slider to stop the valve core against the valve body and to isolate the first port and the second port.

In some embodiments, the valve body includes a first cavity and a second cavity, the first cavity is communicated with the first port, the second cavity is communicated with the second port, the first cavity and the second cavity can be communicated with each other, an annular flange is arranged on the outer peripheral side of the joint of the first cavity and the second cavity, the other end of the slider is provided with a positioning hole, and the positioning hole and the annular flange are coaxially arranged to enable the valve core to be in sealing contact with the annular flange when the coil is powered off.

In some embodiments, the valve core is spherical, the positioning hole is a spherical hole, and the diameter of the positioning hole is the same as the diameter of the valve core.

Drawings

Fig. 1 is a schematic structural view of a high-speed switching valve according to an embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view at a in fig. 1.

Reference numerals are as follows:

a yoke 1; a central portion 11; an annular portion 12; a second annular wall 13;

a coil 2;

an armature 3; an annular groove 31;

an elastic member 4;

a valve body 5; a housing 51; an inner cavity 511; a valve housing 52; an inner bore 521; a first annular wall 53; a first port 501; a second port 502;

a valve core 6;

a baffle 7.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A high-speed switching valve according to an embodiment of the present invention will be described with reference to fig. 1 and 2.

The high-speed switch valve of the embodiment of the invention comprises a yoke iron 1, a coil 2, an armature 3, an elastic piece 4, a valve body 5 and a valve core 6.

The coil 2 extends along a part of the circumference of the yoke 1 in a closed manner so as to be adapted to generate a magnetic field, and the armature 3 is provided on one side of the yoke 1 in the axial direction so as to be adapted to be attracted to the yoke 1 when the coil 2 generates the magnetic field.

Specifically, yoke 1 extends along vertical upper and lower direction, coil 2 is the loop configuration, coil 2 overlaps the periphery side at some yoke 1, produces the magnetic field when coil 2 circular telegram, yoke 1 is magnetic substance, armature 3 is magnetic substance, and magnetic induction line retrains and gets into in yoke 1 so that yoke 1 has magnetism, and armature 3 locates the downside of yoke 1, and when coil 2 cuts off the power supply, has the clearance between armature 3 and the yoke 1, and when coil 2 circular telegram, yoke 1 is magnetized so that the actuation of armature 3 is at the lower extreme of yoke 1.

The elastic element 4 is arranged coaxially with the coil 2, part of the elastic element 4 is sleeved on the outer peripheral side of the yoke 1, and the elastic element 4 can stretch and retract along the axial direction of the elastic element to push the armature 3 to reset after the coil 2 is powered off.

Specifically, the elastic part 4 is arranged on the lower side of a part of the yoke 1 sleeved by the coil 2, the upper end of the elastic part 4 is fixedly connected with the yoke 1, the elastic part 4 can be compressed in the up-down direction, the lower end of the elastic part 4 is abutted to the upper end of the armature 3, when the coil 2 is electrified, the armature 3 is attracted by the yoke 1, so that the elastic part 4 is compressed in the up-down direction, the elastic potential energy is stored in the elastic part 4, after the coil 2 is powered off, the elastic potential energy of the elastic part 4 is released, the elastic part 4 is restored to the original length in the up-down direction, and the armature 3 is pushed to move downwards for resetting.

The valve body 5 is provided with a first port 501 and a second port 502, the valve core 6 is arranged on the valve body 5, and the valve core 6 can move relative to the valve body 5 under the driving of the armature 3 to control the on-off of the first port 501 and the second port 502.

Specifically, the valve core 6 is connected with the armature 3, when the coil 2 is energized, the armature 3 moves upwards, so that the valve core 6 has a moving space in the up-down direction, the first port 501 and the second port 502 are communicated through the moving space, and when the coil 2 is de-energized, the armature 3 resets downwards, so that the valve core 6 is blocked on the valve body 5, a connecting channel between the first port 501 and the second port 502 is blocked, and the first port 501 and the second port 502 are blocked, so that the function of opening and closing the valve is realized.

The elastic part 4 of the high-speed switch valve of the embodiment of the invention is of an annular structure, the upper half part of the elastic part 4 is sleeved at the lower end of the partial yoke 1 sleeved by the coil 2, so that the deformation of the elastic part 4 is not reduced, the stroke of the armature 3 is shortened, the time for resetting the armature 3 and attracting the armature 3 is reduced, the response speed of the high-speed switch valve of the embodiment of the invention is improved, and the high-speed switch valve of the embodiment of the invention has the advantage of high response speed.

In some embodiments, the elastic member 4 is a wave spring, so that the elastic member 4 has a higher elastic modulus in the up-down direction, and has a larger elastic force while the armature 3 has a smaller moving stroke, i.e., the elastic member 4 has a smaller deformation amount, so that the speed of resetting the armature 3 is increased, and the response speed of the telltale switch valve of the embodiment of the invention is increased.

In some embodiments, the armature 3 is provided with an annular groove 31, the annular groove 31 opening toward the coil 2, the annular groove 31 extending coaxially with the elastic member 4, a portion of the elastic member 4 fitting within the annular groove 31.

Specifically, the annular groove 31 is provided on the upper side of the armature 3, and the opening of the annular groove 31 is upward, the annular groove 31 extends along the circumferential direction of the portion of the yoke 1 that is sleeved by the coil 2, and the lower half portion of the elastic member 4 is fitted in the annular groove 31.

Therefore, the annular groove 31 has a set depth dimension, the lower part of the elastic member 4 can be fitted into the annular groove 31, and the elastic member 4 with the set depth dimension can be fitted into the annular groove 31, so that the length of the elastic member 4 in the vertical direction is increased, and the elastic member 4 with a larger dimension has a larger elastic modulus, so that the elastic member 4 has a larger elastic force when restoring to the original length, thereby accelerating the resetting speed of the armature 3 and improving the response speed of the high-speed switching valve according to the embodiment of the invention.

In some embodiments, the yoke 1 includes a central portion 11 and an annular portion 12, the coil 2 is disposed on an outer peripheral side of the central portion 11, the annular portion 12 is disposed on an outer peripheral side of the coil 2 and extends in an axial direction of the coil 2 in a closed manner, and an end of the annular portion 12 facing away from the armature 3 is connected to an end of the central portion 11 facing away from the armature 3.

Specifically, the annular portion 12 extends coaxially with the central portion 11, an upper end of the annular portion 12 is connected to an upper end of the central portion 11, the central portion 11 has a cylindrical structure, the annular portion 12 has an annular structure, a lower end of the annular portion 12 is on the same plane as a lower end of the central portion 11, and the annular portion 12 is fitted around an outer peripheral side of the coil 2.

Therefore, the upper end of the annular part 12 is connected with the upper end of the central part 11, when the yoke 1 is magnetized under the action of the coil 2, the annular part 12 is also magnetic, the annular part 12 can restrict the magnetic induction lines outside the coil 2, the central part 11 restricts the magnetic induction lines inside the coil 2, the magnetic field intensity of the lower end of the yoke 1 is improved when the coil 2 is electrified, the acting force when the armature 3 is attracted to the yoke 1 is increased, the attraction speed of the armature 3 is improved, and the high-speed switch valve of the embodiment of the invention has higher response speed.

In some embodiments, when the coil 2 is energized, a portion of the armature 3 engages the annular portion 12 and a portion of the armature 3 engages the central portion 11.

Specifically, the projection of a part of the armature 3 in the vertical up-down direction coincides with the projection of the annular portion 12 in the vertical direction, so that when the coil 2 is energized and the armature 3 is attracted to the yoke 1, the central position of the upper end face of the armature 3 is attracted to the lower end of the central portion 11, and the edge position of the upper end face of the armature 3 is attracted to the lower end face of the annular portion 12.

Therefore, on one hand, the contact area of the armature 3 and the yoke 1 in attraction contact is increased, the yoke 1 and the armature 3 are firmly attracted, the action accuracy of the high-speed switch valve is improved, on the other hand, the yoke 1 has a larger diameter while the diameter of the coil 2 is not increased, and the volume of a combination of the coil 2 and the yoke 1 is reduced.

In some embodiments, the high-speed switching valve includes a baffle 7, the baffle 7 is disposed between the central portion 11 and the annular portion 12, and the baffle 7 is disposed between the coil 2 and the elastic member 4 to be adapted to block the elastic member 4.

Specifically, the baffle 7 is arranged between the coil 2 and the elastic member 4, the baffle 7 is of an annular structure, the upper end of the elastic member 4 abuts against the lower end face of the baffle 7, and the upper end face of the baffle 7 abuts against the lower end face of the coil 2.

Therefore, the upper end of the elastic part 4 is abutted against the baffle 7, when the elastic part 4 is pressed, the contact area of the reaction force applied to the coil 2 is increased, the pressure applied to the coil 2 is reduced, and the coil 2 is prevented from being damaged by the elastic force of the elastic part 4.

In some embodiments, the shield 7 is sealingly connected to the yoke 1 to isolate the coil 2 from the side of the yoke 1 facing the armature 3.

Specifically, the inner edge of the baffle plate 7 is provided with an annular seal ring to sealingly connect the inner edge of the baffle plate 7 with the side wall of the central portion 11, the outer edge of the baffle plate 7 is provided with an annular seal ring to sealingly connect the outer edge of the baffle plate 7 with the inner edge of the annular portion 12,

therefore, the baffle 7 isolates the coil 2 from the lower end face of the yoke 1, so that sundries at the lower end of the yoke 1 are prevented from contacting the coil 2, the failure rate of the coil 2 is reduced, and the reliability of the high-speed switch valve of the embodiment of the invention is improved.

In some embodiments, the end of the valve body 5 facing the yoke 1 is provided with a first annular wall 53, the armature 3 is fitted in the first annular wall 53, the end of the yoke 1 facing the valve body 5 is provided with a second annular wall 13, and the first annular wall 53 is sealingly fitted in the second annular wall 13.

Specifically, the first annular wall 53 is disposed at the upper end of the valve body 5, the first annular wall 53 is of an annular structure, the upper end of the first annular wall 53 abuts against the lower end face of the yoke 1, the first annular wall 53 extends in a closed manner along the circumferential direction of the valve body 5, an installation cavity is formed by the inner edge of the annular wall, the armature 3 is disposed in the installation cavity, the second annular wall 13 is disposed at the lower end of the yoke 1, the second annular wall 13 is of an annular structure, the second annular wall 13 and the first annular wall 53 are coaxially disposed, and the inner diameter of the second annular wall 13 is the same as the outer diameter of the first annular wall 53, so that the outer wall face of the first annular wall 53 and the inner wall face of the second annular wall 13 are in a sealing fit.

Therefore, the armature 3 is arranged in the first annular wall 53, and the upper end of the first annular wall 53 abuts against the lower end face of the yoke 1, so that the armature 3 is hermetically isolated from the outer side of the first annular wall 53, the situation that sundries on the outer side of the high-speed switch valve in the embodiment of the invention contact with the armature 3 and influence the work of the armature 3 is avoided, and the reliability of the high-speed switch valve in the embodiment of the invention in the severe condition is improved.

In some embodiments, the high-speed switch valve includes a slider, the slider is disposed on the valve body 5 and can slide along the axial direction of the valve body 5 in a sealing manner, one end of the slider is connected with the armature 3, when the coil 2 is energized, a gap is formed between the slider and the valve core 6 to communicate the first port 501 and the second port 502, and when the coil 2 is de-energized, the armature 3 is reset to enable the slider to stop the valve core 6 against the valve body 5 and to isolate the first port 501 and the second port 502.

Specifically, the sliding block is in sliding fit with the valve body 5 vertically and vertically, the sliding block is in sliding fit with the valve body 5 in a sealing mode, the upper end of the sliding block is connected with the armature 3, when the armature 3 moves up and down, the sliding block moves up and down along with the armature 3, the positioning hole is located at the lower end of the sliding block, and the positioning hole and the sliding block extend coaxially.

The valve body 5 includes a housing 51 and a valve housing 52, the housing 51 has an inner cavity 511 penetrating the housing 51 in the vertical up-down direction, the valve housing 52 is fitted to the lower portion of the inner cavity 511, the valve housing 52 is provided with an inner hole 521 penetrating the valve housing 52 in the vertical up-down direction, the inner hole 521 is communicated with the inner cavity 511, the lower end of the inner hole 521 forms a first port 501, a second port 502 is provided on the peripheral side of the housing 51, and the second port 502 is communicated with the inner cavity 511 of the housing 51.

Therefore, when the coil 2 is powered off and the armature 3 moves downward together with the slider, the upper end of the valve core 6 abuts against the lower end of the slider, and the lower end of the valve core 6 abuts against the upper end of the hole wall of the inner hole 521, so that the inner hole 521 is isolated from the inner cavity 511, and the first port 501 is isolated from the second port 502.

In some embodiments, the valve body 5 includes a first cavity and a second cavity, the first cavity is communicated with the first port 501, the second cavity is communicated with the second port 502, the first cavity and the second cavity can be communicated with each other, an annular flange is arranged on the outer peripheral side of the joint of the first cavity and the second cavity, the other end of the slider is provided with a positioning hole, and the positioning hole and the annular flange are coaxially arranged to be suitable for the valve core 6 to be sealed and abutted against the annular flange when the coil 2 is powered off.

Specifically, the inner cavity 511 of the outer shell 51 of the valve body 5 forms a second cavity, the inner hole 521 of the valve sleeve 52 forms a first cavity, the upper end of the inner hole 521 of the valve core 6 of the valve body 5 forms an annular flange, the slide block is in sliding fit with the upper half section of the inner cavity 511 of the outer shell 51, the valve core 6 is arranged between the slide block and the valve sleeve 52, the cross-sectional shape of the valve core 6 is the same as that of the inner hole 521, and the cross-sectional shape of the positioning hole is the same as that of the valve core 6.

Therefore, when the coil 2 is powered off, the armature 3 is communicated with the sliding block to move downwards, the upper end of the valve core 6 is enabled to be abutted against the positioning hole, meanwhile, the axis of the valve core 6 is overlapped with the axis of the annular flange, and when the lower end of the valve core 6 is contacted with the annular flange, the surface of the valve core 6 is in sealing connection with the annular flange, so that the first port 501 and the second port 502 are completely isolated.

In some embodiments, the valve core 6 is spherical, and the positioning hole is a spherical hole, and the diameter of the positioning hole is the same as the diameter of the valve core 6.

Specifically, the valve core 6 is a spherical structure, the positioning hole is a hemispherical hole, and the radius of the positioning hole is the same as that of the valve core 6, so that the valve core 6 can be fitted into the positioning hole, the valve core 6 has better centering performance, and the inner hole 521 of the valve sleeve 52 is a circular hole, i.e., the annular flange is annular.

Therefore, when the valve core 6 is stopped by the sliding block to abut against the annular flange, the contact form of the valve core 6 and the annular flange is line contact, the sealing performance is high, and the reliability of the high-speed switch valve of the embodiment of the invention is improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A high-speed switching valve, comprising:

the magnetic circuit breaker comprises a yoke, a coil and an armature, wherein the coil extends along part of the circumferential direction of the yoke in a closed manner so as to be suitable for generating a magnetic field, and the armature is arranged on one side of the yoke in the axial direction so as to be suitable for attracting the yoke when the coil generates the magnetic field;

the elastic piece is coaxially arranged with the coil, part of the elastic piece is sleeved on the outer peripheral side of the yoke, and the elastic piece can stretch and retract along the axial direction of the elastic piece so as to push the armature to reset after the coil is powered off;

the valve body is provided with a first port and a second port, the valve core is arranged on the valve body, and the valve core can move relative to the valve body under the driving of the armature iron so as to control the on-off of the first port and the second port.

2. The high-speed switching valve according to claim 1, wherein the armature is provided with an annular groove opening toward the coil, the annular groove extending coaxially with the elastic member, a part of the elastic member being fitted in the annular groove.

3. The high-speed switching valve according to claim 2, wherein the yoke includes a center portion and an annular portion, the coil is provided on an outer peripheral side of the center portion, the annular portion is provided on an outer peripheral side of the coil and extends in an axial direction of the coil in a closed manner, and an end of the annular portion facing away from the armature is connected to an end of the center portion facing away from the armature.

4. The high-speed switching valve according to claim 3, wherein when the coil is energized, a portion of the armature is attracted to the annular portion and a portion of the armature is attracted to the central portion.

5. The high-speed switching valve according to claim 3, comprising a stopper disposed between the central portion and the annular portion, and disposed between the coil and the elastic member so as to be adapted to stop the elastic member.

6. The high-speed switching valve according to claim 5, wherein the flapper is sealingly connected to the yoke to isolate the coil from a side of the yoke facing the armature.

7. The high-speed switching valve according to claim 6, wherein the valve body is provided with a first annular wall at an end facing the yoke, the armature being fitted in the first annular wall, and the yoke is provided with a second annular wall at an end facing the valve body, the first annular wall being sealingly fitted in the second annular wall.

8. The high-speed switch valve according to any one of claims 1 to 7, comprising a slider, wherein the slider is arranged on the valve body and can slide in a sealing manner along the axial direction of the valve body, one end of the slider is connected with the armature, when the coil is electrified, a gap is formed between the slider and the valve core so as to communicate the first port and the second port, and when the coil is electrified, the armature is reset so that the slider stops the valve core against the valve body and cuts off the first port and the second port.

9. The high-speed switching valve according to claim 8, wherein the valve body includes a first chamber and a second chamber, the first chamber communicates with the first port, the second chamber communicates with the second port, the first chamber and the second chamber are communicable with each other, an annular flange is provided on an outer peripheral side of a junction of the first chamber and the second chamber, and the other end of the slider is provided with a positioning hole coaxially arranged with the annular flange so as to be adapted to seal the valve element against the annular flange when the coil is deenergized.

10. The high-speed switching valve according to claim 9, wherein the valve body is spherical, the positioning hole is a spherical hole, and the diameter of the positioning hole is the same as the diameter of the valve body.