CN111998095A - Novel two-position three-way electromagnetic valve - Google Patents

Abstract

The invention discloses a novel two-position three-way solenoid valve, comprising a lower casing and an upper casing fixed on the upper end of the lower casing; the lower casing is provided with an air inlet channel and an air outlet channel, and the lower casing is provided with an air inlet channel and an air outlet channel The lower casing is also provided with a first through hole connecting the air inlet channel and the groove and a second through hole connecting the air outlet channel and the groove; the upper casing is provided with a blocking iron, and the blocking iron is provided with a valve core , the valve core is located above the first through hole and is located outside the second through hole, the side of the valve core is axially provided with a gas flow groove, the lower end of the valve core extends into the groove and is radially provided with a clamping part, the clamping part is arranged radially. A spring is arranged between the connecting part and the blocking iron; the outer side of the valve core is provided with a magnetic isolation ring at the upper end of the blocking iron, and the outer side of the blocking iron and the magnetic isolation ring is surrounded by a coil; The center of the end head is provided with an exhaust channel along the axial direction; the spring of the valve core is arranged at the non-working air gap, which avoids loss of the suction area of the valve core and helps reduce the overall weight of the solenoid valve.

Description

A new two-position three-way solenoid valve

technical field

The invention belongs to the technical field of solenoid valves, and in particular relates to a novel two-position three-way solenoid valve.

Background technique

Solenoid valve is an automatic basic component used to control the direction of medium movement. It is usually used in mechanical control and industrial valves to control the flow of medium. Among them, two-position three-way solenoid valve is one of the solenoid valves. , the medium has two movement modes and three movement channels in the two-position three-way solenoid valve.

The two-position three-way solenoid valve can provide control gas for the gas actuated valve and provide the exhaust passage for the control gas. The traditional two-position three-way solenoid valve generally has two structures: split type and integral type. The solenoid valve generally includes two upper and lower valves. The valve is linked with the iron core through the ejector rod, and the part sealed with the valve is integrated on the shell, which is difficult to process and has a complex structure; the integral two-position three-way solenoid valve connects the iron core. It is integrated with the valve design to realize the functions of energization, suction and sealing, and simplifies the product structure. However, in the layout of the circulation channel, the inlet gas generally enters the outlet through the flow channel of the electromagnet part and then through the flow channel on the casing. There will be a problem of unsmooth connection between the channels; at the same time, the springs of the valve core inside the existing solenoid valve are all arranged at the working air gap, and the spring holes need to be processed at the working air gap, thereby reducing the valve size. The suction area of the core.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a new two-position three-way solenoid valve in order to overcome the existing technical defects, which is simple in assembly and convenient in installation, avoids processing a spring hole at the working air gap and reduces the suction area of the valve core, and has the advantages of simple assembly and convenient installation. Conducive to reducing the overall weight of the solenoid valve.

In order to solve the above technical problems, the present invention provides a new two-position three-way solenoid valve, which includes a lower casing and an upper casing fixed on the upper end of the lower casing

The lower shell is provided with an air inlet channel and an air outlet channel, the inside of the lower shell is provided with a groove, and the lower shell is also provided with a first passage for connecting the air inlet channel and the groove. a hole and a second through hole for communicating the air outlet channel and the groove;

The upper shell is provided with a ring of blocking iron, the blocking iron is provided with a valve core, the valve core is located above the first through hole and is located outside the second through hole, and the valve core is located at the outer side of the second through hole. A gas flow groove is axially provided on the side surface, the lower end of the valve core extends into the groove, and a clamping portion is radially provided, and a spring is provided between the clamping portion and the blocking iron;

The side of the valve core is located at the upper end of the blocking iron and is surrounded by a magnetic isolation ring, and the outer sides of the blocking iron and the magnetic isolation ring are surrounded with coils;

The upper part of the valve core is provided with an exhaust end, the center of the exhaust end is provided with an exhaust channel along the axial direction, and the lower part of the exhaust end is arranged in the magnetic isolation ring.

Further, a first sealing block is provided at the position of the bottom end of the valve core corresponding to the first through hole.

Further, a second sealing block is provided at a position of the top of the valve core corresponding to the exhaust passage.

Further, the lower part of the valve core is a rounded truncated truncated structure, the clamping portion is arranged at the lower end of the rounded truncated structure, and the spring is a conical coil spring.

Further, the side surface of the valve core is axially provided with two mutually symmetrical gas flow grooves.

Further, the upper part of the exhaust end is provided with a third through hole transversely passing through the exhaust end and communicating with the exhaust passage.

Further, the upper end of the exhaust end head is fixedly covered with a dust cover by means of screws.

Further, the dust cover is an inverted concave structure, and there is a gap between the inner circumferential surface of the dust cover and the outer circumferential surface of the exhaust end.

Further, the upper casing and the lower casing are fixedly connected by bolts.

Further, a sealing ring is provided at the position where the lower casing is in contact with the upper casing and the blocking iron.

The present invention has the following beneficial effects:

When a new two-position three-way solenoid valve of the present invention is energized, the valve core blocks the exhaust passage under the action of electromagnetic suction, thereby forming a sealing structure with the exhaust end to ensure the tightness of the intake passage and the exhaust passage. , that is, when the valve core is energized, the air inlet channel is connected to the air outlet channel, and both are not connected to the exhaust channel; when the air outlet channel does not need gas to flow out, the coil is powered off, and the valve core moves downward under the action of the spring to block The first through hole and the lower casing form a sealing structure, which cuts off the gas supply at the gas inlet channel, and the gas at the gas outlet channel flows to the groove through the second through hole, and then flows through the gas flow groove and finally reaches the exhaust channel. Exhaust, that is, when the power is off, the outlet channel is connected to the exhaust channel, but is not connected to the inlet channel; and the spring of the valve core is set at the non-working air gap, which can avoid loss of the suction area of the valve core, and is conducive to reducing Solenoid valve overall weight.

Additional aspects and advantages of the present invention will be set forth in part in the following description, which will be apparent from the following description, or may be learned by practice of the present invention.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of this application, and do not constitute an improper limitation of the present invention. In the accompanying drawings:

1 is a cross-sectional view of a novel two-position three-way solenoid valve in an embodiment;

Fig. 2 is the interface diagram of the upper casing in the embodiment;

Fig. 3 is the interface diagram of the upper casing in the embodiment;

FIG. 4 is an interface diagram of the valve core in the embodiment.

Detailed ways

In order to more fully understand the technical content of the present invention, the present invention will be further introduced and described below with reference to the accompanying drawings and specific embodiments; It is used to distinguish different components, etc., and does not represent the order, nor does it limit that "first" and "second" are of different types.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the The embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative efforts, fall within the protection scope of the present invention.

Example

As shown in Figures 1-4, a new type of two-position three-way solenoid valve shown in this embodiment includes a lower casing 1 and an upper casing 2, and the upper casing 2 is fixed on the upper end of the lower casing 1. The lower casing 1 is provided with an air inlet channel 11 and an air outlet channel 12 , a groove 10 is provided at the center of the inner bottom end of the lower casing 1 , and the lower casing 1 is also provided with an air inlet channel 11 and a groove for communication The first through hole 13 of 10 and the second through hole 14 for communicating the air outlet channel 12 and the groove 10; inside the upper casing 2, there is a ring of stopper 21 with L-shaped cross-section. There is a valve core 22 inside, the valve core 22 is located directly above the first through hole 13 and is located outside the second through hole 14, a gas flow groove 23 is axially provided on the side of the valve core 22, and the lower end of the valve core 22 extends into the groove 10 and the lower end of the valve core 22 is radially provided with a ring of clamping parts 24, and a spring 25 is provided between the clamping part 24 and the blocking iron 21; There is a magnetic isolation ring 26, the top of the magnetic isolation ring 26 is higher than the top of the valve core 22, a coil 27 is arranged around the outer side of the blocking iron 21 and the magnetic isolation ring 26; an exhaust end 28 is provided above the valve core 22, An exhaust passage 29 is provided in the center of the exhaust end 28 along the axial direction, and the lower part of the exhaust end 28 is arranged in the magnetic isolation ring 26;

In the above structure, when the coil 27 is not energized, the valve core 22 blocks the first through hole 13 under the action of the spring 25, thereby forming a sealing structure with the lower casing 1, and the gas at the gas inlet channel 11 is sealed in the valve Before the core 22, the gas outlet channel 12 is connected to the groove 10 through the second through hole 14, and then communicates with the exhaust channel 29 through the gas flow groove 23; after the coil 27 is energized, the valve core 22 overcomes the spring 25 under the action of electromagnetic suction. The upper end of the first through hole 13 is opened, the upper end of the valve core 22 blocks the exhaust passage 29, the gas at the air inlet passage 11 enters the groove 10 through the first through hole 13, and then passes through the first through hole 13. The two through holes 14 flow to the air outlet channel 12 and then flow out; the valve core 22 blocks the exhaust channel 29 under the action of electromagnetic suction and then forms a sealing structure with the exhaust end 28 to ensure the airtightness of the air inlet channel 11 and the exhaust channel 29. , that is, when the valve core 22 is energized, the air inlet channel 11 is connected to the air outlet channel 12, and both are not connected to the exhaust channel 29; when the air outlet channel 12 does not need gas to flow out, the coil 27 is de-energized, and the valve core 22 is in the spring 25 moves downward to block the first through hole 13 and form a sealing structure with the lower casing 1, cutting off the gas supply at the gas inlet channel 11, and the gas at the gas outlet channel 12 flows to the groove 10 through the second through hole 14 Afterwards, the gas flows through the gas flow groove 23 and is finally discharged at the exhaust passage 29 , that is, the outlet passage 12 communicates with the exhaust passage 29 when the power is turned off, but does not communicate with the inlet passage 11 .

Specifically, a first installation groove 31 is provided at the position of the bottom end of the valve core 22 corresponding to the first through hole 13, and a first sealing block 33 is provided in the first installation groove 31; A second installation groove 32 is provided at the position of the air passage 29, and a second sealing block 34 is provided in the second installation groove 32; When the valve core 22 is under the action of the spring 25, the first sealing block 33 can better seal the first through hole 13, and the second sealing block 34 can better contact the bottom end of the exhaust end 28, and then When the coil 27 is energized, the valve core 22 moves upward against the action of the spring 25 , and the second sealing block 34 can better seal the exhaust passage 29 .

Specifically, a circle of first protrusions 38 is provided on the outer side of the first through hole 13 in the groove 10 , and a circle of second protrusions is provided at the bottom end of the exhaust end 28 on the outer side of the exhaust passage 29 39; the first protruding portion 38 can abut against the first sealing block 33, and when the coil 27 is not energized, the valve core 22 is under the action of the spring 25, and the first protruding portion 38 can squeeze the first sealing block 33, In this way, the first through hole 13 can be better sealed, and the second raised portion 39 can be in contact with the second sealing block 34, so that when the coil 27 is energized, the valve core 22 moves upward against the action of the spring 25, and the second protrusion 39 can abut against the second sealing block 34. The protruding portion 39 can press the second sealing block 34 to better seal the exhaust passage 29 .

Specifically, the lower part of the valve core 22 is of a rounded truncated structure, the clamping part 24 is arranged at the lower end of the rounded truncated structure, the spring 25 is a conical coil spring with a large upper and a lower small, and the number of gas flow grooves 23 is two, and Symmetrically arranged on the axial side of the valve core 22; the lower part of the valve core 22 is an inverted cone-shaped structure, which can help reduce the overall weight of the solenoid valve, and at the same time can avoid the loss of the suction of the valve core by installing a spring at the working air gap. The spring 25 adopts a conical coil spring to adapt to the structure of the valve core 22; the two gas flow grooves 23 are symmetrically arranged on both axial sides of the valve core 22, which can increase the path of the gas flowing to the exhaust passage 29 and increase the exhaust gas flow. Effect.

Specifically, a third through hole 35 transversely passing through the exhaust end 28 is provided on the upper part of the exhaust end 28, and the third through hole 35 communicates with the exhaust passage 29; The screw 36 is fixedly covered with a dust cover 37 with an inverted concave structure, and a certain gap is set between the inner circumferential surface of the dust cover 37 and the outer circumferential surface of the exhaust end 28; The upper end cover is covered with a dust cover 37 with an inverted concave structure to prevent impurities such as dust, sand and gravel from entering the interior of the solenoid valve. After the dust cover 37 is closed, in order not to affect the exhaust effect of the exhaust passage 29, The upper part of the exhaust end 28 is provided with a third through hole 35 which transversely passes through the exhaust end 28 and communicates with the exhaust passage 29 . The gap can allow the gas flowing through the third through hole 35 to be discharged better.

Specifically, four screw holes 15 are provided equidistantly at the edge of the top end of the lower housing 1 , a mounting portion 16 is provided at the lower end of the upper housing 2 , and four screw holes are provided on the mounting portion 16 at positions corresponding to the four screw holes Mounting hole 17, the upper shell 2 and the lower shell 1 are fixedly connected with the screw hole 15 through the bolt 18 through the mounting hole 17; The connection strength between the bodies 1 is improved, and the bolts 18 are matched with the screw holes 15. When the solenoid valve needs to be repaired, it can be easily disassembled and the maintainability of the solenoid valve is increased.

Specifically, a sealing ring installation groove 19 is provided at the position where the lower casing 1 is in contact with the upper casing 2 and the blocking iron 21, and a sealing ring 20 is provided in the sealing ring installation groove 19; when the upper casing 2 is connected to the lower casing After the body 1 passes through the installation hole 17 through the bolt 18 and is fixedly connected with the screw hole 15, the upper casing 2 and the blocking iron 21 can squeeze the sealing ring 20 located in the sealing ring installation groove 19, so that the lower casing 1 and the upper casing are connected. The contact place between the bodies 2 is completely sealed, which increases the sealing performance of the solenoid valve.

In other embodiments, the first sealing block and the second sealing block are both fluoroplastic sealing blocks; the sealing ring is a rubber sealing ring.

The technical solutions provided by the embodiments of the present invention have been introduced in detail above. The principles and implementations of the embodiments of the present invention are described in this paper by using specific examples. The descriptions of the above embodiments are only applicable to help understand the embodiments of the present invention. At the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation and application scope. To sum up, the content of this specification should not be construed as a limitation of the present invention.

Claims (10)

1. A novel two three way solenoid valve which characterized in that: comprises a lower shell and an upper shell fixedly arranged at the upper end of the lower shell;

the lower shell is provided with an air inlet channel and an air outlet channel, a groove is formed in the lower shell, and the lower shell is also provided with a first through hole used for communicating the air inlet channel with the groove and a second through hole used for communicating the air outlet channel with the groove;

a circle of stop iron is arranged in the upper shell, a valve core is arranged in the stop iron, the valve core is positioned above the first through hole and positioned outside the second through hole, a gas circulation groove is axially formed in the side surface of the valve core, the lower end of the valve core extends into the groove and is radially provided with a clamping part, and a spring is arranged between the clamping part and the stop iron;

a magnetism isolating ring is arranged at the upper end of the stop iron on the outer side of the valve core, and coils are arranged on the outer sides of the stop iron and the magnetism isolating ring in a surrounding mode;

an exhaust end is arranged above the valve core, an exhaust channel is axially arranged at the center of the exhaust end, and the lower part of the exhaust end is arranged in the magnetic isolation ring.

2. The novel two-position three-way electromagnetic valve as claimed in claim 1, wherein a first sealing block is arranged at the position of the bottom end of the valve core corresponding to the first through hole.

3. The novel two-position three-way electromagnetic valve as claimed in claim 2, wherein a second sealing block is arranged at the position of the top end of the valve core corresponding to the exhaust passage.

4. The novel two-position three-way electromagnetic valve as claimed in claim 3, wherein the lower part of the valve core is of an inverted frustum structure, the clamping portion is arranged at the lower end of the inverted frustum structure, and the spring is a conical helical spring.

5. The new two-position three-way electromagnetic valve as claimed in claim 4, characterized in that the side of the valve core is axially provided with two mutually symmetrical gas circulation grooves.

6. The new two-position three-way solenoid valve as recited in claim 1 wherein said exhaust tip has a third through hole in an upper portion thereof that extends transversely through said exhaust tip and communicates with said exhaust passage.

7. The new two-position three-way solenoid valve as claimed in claim 6, wherein a dust cap is provided on the upper end cap of the exhaust end.

8. The new two-position three-way electromagnetic valve as claimed in claim 7, wherein the dust cap is of an inverted concave structure, and a gap is provided between the inner circumferential surface of the dust cap and the outer circumferential surface of the exhaust end.

9. The novel two-position three-way solenoid valve as claimed in claim 1, wherein said upper housing is fixedly connected to said lower housing by bolts.

10. The new two-position three-way solenoid valve as claimed in claim 9, wherein a sealing ring is provided at the position where the lower housing contacts the upper housing and the stopper.

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