CN213332672U - Electromagnetic valve - Google Patents

Abstract

The utility model relates to a solenoid valve, which comprises a valve body and a sealing component; the valve body is internally provided with a valve port, and the sealing component can move close to or far away from the valve port to close or open the valve port; at least two annular convex parts arranged around the valve port are arranged in the valve body, and the heights of the at least two annular convex parts are equal or unequal along the axis direction of the valve port; the annular protrusion is capable of cooperating with the seal assembly to seal the valve port as the seal assembly moves closer to the valve port. The utility model has the advantages that: the sealing performance of the solenoid valve can be improved.

Description

Electromagnetic valve

Technical Field

The utility model relates to a refrigeration technology field especially relates to a solenoid valve.

Background

The electromagnetic valve is applied to an air conditioning system and used for controlling and regulating fluid media.

The common electromagnetic valve comprises a valve body, a valve rod and a sealing element, wherein a valve port is arranged in the valve body;

however, in the prior art, the sealing mode of the sealing element for sealing the valve port is single-ring-shaped sealing, and after the valve port and the sealing element are installed and used, the valve port and the sealing element are impacted and abraded, so that the sealing function is failed, and the internal leakage of a product is easy to exceed the standard.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a solenoid valve with good sealing performance.

The utility model provides a solenoid valve, which comprises a valve body and a sealing component; the valve body is internally provided with a valve port, and the sealing assembly can move close to or far away from the valve port to close or open the valve port;

at least two annular convex parts which are arranged around the valve port are arranged in the valve body, and the heights of the at least two annular convex parts are equal or unequal along the axis direction of the valve port;

the annular protrusion is configured to cooperate with the seal assembly to seal the valve port as the seal assembly moves closer to the valve port.

In this application, through be equipped with at least two in the valve body and enclose the annular bellying of establishing in valve port circumference, and along with seal assembly is close to the valve port motion, annular bellying can cooperate with seal assembly in order to seal the valve port, the high inequality of two at least annular bellyings in the valve body, make seal assembly and the annular bellying striking wearing and tearing back of contact earlier, can play sealed effect again with the annular bellying of back contact to improve the sealing performance of solenoid valve.

In one embodiment, at least two of the annular protrusions have a spacing therebetween.

In one embodiment, the number of the annular protrusions is 2, and 2 annular protrusions are respectively a first annular protrusion and a second annular protrusion, and the first annular protrusion is arranged around the valve port and inside the second annular protrusion;

the first annular boss and the second annular boss are concentrically arranged.

In one embodiment, the first annular projection has a height that is greater than a height of the second annular projection in a direction along the axis of the valve port; alternatively, the height of the second annular boss is higher than the height of the first annular boss.

So set up, make seal assembly and the annular bellying striking wearing and tearing back of contact earlier, can play sealed effect again with the annular bellying of back contact to improve the sealing performance of solenoid valve.

In one embodiment, the solenoid valve further comprises a first iron core and a first elastic member, wherein the first iron core and the first elastic member are installed at one end far away from the valve port; the seal assembly includes a second plunger located proximate to one end of the valve port;

so set up, when the solenoid valve operated, supported respectively through first elastic component and leaned on in first iron core and second iron core, through the stroke of first iron core control second iron core, thereby made the relative valve body motion of seal assembly open or close the valve port.

In one embodiment, the sealing assembly further comprises a second elastic member, a sealing member and a limiting member; the end surface of one end of the second iron core, which is close to the valve port, is provided with a cavity which is arranged in an opening way;

the second elastic piece is arranged in the cavity, and the sealing piece extends into the cavity from the opening and is arranged in the cavity and abutted against the second elastic piece;

the limiting piece is installed at one end, close to the valve port, of the second iron core and used for limiting the sealing piece.

It will be appreciated that the seal is adapted to be in compressive engagement with the annular projection to open or close the valve port; the limiting piece is installed to limit the sealing piece, so that the sealing piece is not easy to fall off from the cavity.

In one embodiment, the seal assembly further comprises a calibration washer, the calibration washer is located between the second elastic member and the seal member, and the calibration washer abuts against the second elastic member.

In one embodiment, the correction gasket is provided with an abutting part and a plane part, and the abutting part is in a circular arc shape and is arranged towards the sealing piece; the plane part is arranged at two ends of the abutting part and abuts against the second elastic piece.

So set up, the second elastic component supports and leans on in the plane part of correction gasket, makes the portion of supporting apply the even concentration of pressure for the sealing member.

In one embodiment, the seal assembly further comprises a protective gasket positioned between the seal member and the calibration gasket, and both sides of the protective gasket abut against the seal member and the calibration gasket, respectively.

By the arrangement, the force which is originally applied to the sealing element by the second elastic element is changed from point contact to surface contact, and the contact area is enlarged.

In one embodiment, the valve body is provided with a medium inlet, and the second iron core is provided with a first channel; and one end of the first channel is communicated with the chamber, and the other end of the first channel is communicated with the medium inlet.

It will be appreciated that the medium flows from the medium inlet via the first channel into the chamber for equalising the pressure, so that the gasket is able to be fully press-fitted when closing the valve port.

Compared with the prior art, the utility model provides a pair of solenoid valve, through be equipped with at least two in the valve body and enclose the annular bellying of establishing in valve port circumference, and along with seal assembly is close to the valve port motion, annular bellying can cooperate with seal assembly in order to seal the valve port, the high inequality of two at least annular bellyings in the valve body, make seal assembly and the annular bellying striking wearing and tearing back of contact earlier, can play sealed effect again with the annular bellying of back contact to improve the sealing performance of solenoid valve.

Drawings

FIG. 1 is a schematic cross-sectional view of different height annular bosses of a solenoid valve.

Fig. 2 is a partially enlarged schematic structural view of a portion a in fig. 1.

Fig. 3 is a schematic cross-sectional view of a uniform height annular boss of the solenoid valve.

Fig. 4 is a partially enlarged structural diagram at B in fig. 3.

In the figure, 100, solenoid valves; 101. a first iron core; 1011. a groove; 102. a first elastic member; 10. a valve body; 11. a valve port; 12. an annular boss; 121. a first annular boss; 122. a second annular boss; 13. a media inlet; 14. a third channel; 15. a media outlet; 20. a seal assembly; 21. a second iron core; 212. a first channel; 22. a second elastic member; 23. a seal member; 24. a chamber; 241. opening the mouth; 25. correcting the gasket; 251. an abutting portion; 252. a planar portion; 26. a protective pad; 27. a limiting member; 271. a second channel; 30. a sleeve; 31. a protrusion; 40. and a valve cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-4, the present invention provides a solenoid valve 100, and the solenoid valve 100 is applied to a refrigeration system for controlling and adjusting a medium in the system.

As shown in fig. 1, specifically, the solenoid valve 100 includes a valve body 10 and a seal assembly 20; the valve body 10 is internally provided with a valve port 11, and the sealing assembly 20 can move close to or far away from the valve port 11 to close or open the valve port 11; at least two annular convex parts 12 arranged around the valve port 11 are arranged in the valve body 10, and the heights of the at least two annular convex parts 12 are equal or unequal along the axial direction of the valve port;

as the seal assembly 20 moves closer to the valve port 11, the annular protrusion 12 can cooperate with the seal assembly 20 to seal the valve port 11.

It can be understood that, by providing at least two annular protrusions 12 around the valve port 11 in the valve body 10 and moving along with the sealing assembly 20 near the valve port 11, the annular protrusions 12 can cooperate with the sealing assembly 20 to form a seal, and the heights of the at least two annular protrusions 12 are different, so that after the sealing assembly 20 is worn by impact with the annular protrusion 12 that is in contact with the first annular protrusion, the annular protrusion 12 that is in contact with the second annular protrusion can play a role in sealing again, thereby improving the sealing performance of the solenoid valve 100.

As shown in fig. 1, the valve body 10 is provided with a medium inlet 13, a third channel 14 and a medium outlet 15, the third channel 14 is communicated with the medium outlet 15, the valve port 11 is positioned between the medium inlet 13 and the third channel 14, when the sealing assembly 20 opens the valve port 11, the medium inlet 13 is communicated with the third channel 14 through the valve port 11, so that the medium inlet 13 is communicated with the medium outlet 15. When the seal assembly 20 closes the valve port 11, the communication between the medium inlet 13 and the third channel 14 is interrupted.

Further, at least two of the annular protrusions 12 have a space therebetween, forming a multiple seal.

In an embodiment, the number of the annular protrusions 12 is 2, and the 2 annular protrusions 12 are a first annular protrusion 121 and a second annular protrusion 122, respectively, and the first annular protrusion 121 is disposed around the valve port 11 and located inside the second annular protrusion 122. In other embodiments, the number of annular protrusions 12 may be 3, 4, or other numbers, which are not described in detail herein. Further, the first annular protrusion 121 and the second annular protrusion 122 are concentrically disposed. With this arrangement, the sealing effect of the sealing assembly 20 for sealing the valve port 11 can be improved.

Specifically, in the axial direction of the valve port, the height of the first annular projection 121 is higher than the height of the second annular projection 122; alternatively, the height of the second annular boss 122 is higher than the height of the first annular boss 121.

In one embodiment, the number of the annular protrusions 12 is 3 or more, and the heights of the annular protrusions are sequentially increased; or the heights of the annular convex parts are sequentially decreased.

Further, the end of the annular protrusion 12 away from the valve port 11 is arc-shaped, which can reduce the contact area during sealing, thereby improving the sealing performance of the solenoid valve 100.

As shown in fig. 3 and 4, in an embodiment, the height of the first annular protrusion 121 is equal to the height of the second annular protrusion 122. It can be understood that, during the process of the impact abrasion of the sealing element 23 and the valve port 11, the plurality of annular protrusions 12 can reduce the probability of the sealing failure, and in rare cases, the plurality of annular protrusions 12 can fail at the same time.

In one embodiment, the solenoid valve 100 further includes a sleeve 30 and a valve cover 40, the sleeve 30 is mounted on the valve body 10, and the sealing assembly 20 is accommodated in the sleeve 30; the valve cover 40 is tightly coupled with the sleeve 30 while the valve cover 40 is sealingly coupled with the valve body 10, for fixing the position of the sleeve 30.

In one embodiment, the solenoid valve 100 further includes a first iron core 101 and a first elastic member 102;

the sealing assembly 20 includes a second iron core 21, the second iron core 21 is accommodated in one end of the sleeve 30 close to the valve port 11, the first elastic element 102 is disposed between the first iron core 101 and the second iron core 21, one end of the first elastic element 102 abuts against the first iron core 101, and the other end abuts against the second iron core 21.

It can be understood that, when the solenoid valve 100 operates, the first iron core 101 controls the stroke of the second iron core 21 by the first elastic element 102 abutting against the first iron core 101 and the second iron core 21, so that the sealing assembly 20 moves in the sleeve 30 to open or close the valve port 11.

Further, the first iron core 101 and the sleeve 30 are positioned and necked down by a tool to complete the assembly, and of course, the first iron core 101 and the sleeve 30 may be connected in different manners, such as clamping.

Specifically, the sleeve 30 is installed on the valve body 10, the sleeve 30 is provided with a protrusion 31 in the circumferential direction of the outer wall of the first iron core 101, a groove 1011 is formed in the circumferential direction of the first iron core 101, and the protrusion 31 extends into the groove 1011 of the first iron core 101, so that necking is completed, and the first iron core 101 is fixedly installed in the sleeve 30.

In an embodiment, the sealing assembly 20 further includes a second elastic element 22 and a sealing element 23, an end surface of one end of the second iron core 21 close to the valve port 11 is opened with a cavity 24 provided with an opening 241;

the second elastic member 22 is installed in the cavity 24, and the sealing member 23 extends from the opening 241 and is installed in the cavity 24 and abuts against the second elastic member 22. The action of the second elastic element 22, through the movement of the second iron core 21 close to the valve port 11, will bring the sealing element 23 to move downwards, when the sealing element 23 abuts against the valve port 11, with the continued movement of the second iron core 21, the second elastic element 22 will be compressed to provide a force for the sealing element 23 to seal the valve port 11.

In one embodiment, the sealing assembly 20 further includes a stopper 27, and the stopper 27 is mounted at an end of the second core 21 close to the valve port 11 and used for stopping the sealing element 23 and preventing the sealing element 23 from falling out of the chamber 24.

Further, the stopper 27 has a second channel 271, the medium inlet 13 is communicated with the second channel 271, and when the valve port 11 is opened, the medium inlet 13 is communicated with the valve port 11 through the second channel 271.

In an embodiment, the sealing assembly 20 further comprises a calibration washer 25, the calibration washer 25 is located between the second elastic member 22 and the sealing member 23, and the calibration washer 25 abuts against the second elastic member 22, and the calibration washer 25 can uniformly concentrate the pressure applied to the sealing member 23 by the second elastic member 22.

Specifically, the calibration washer 25 has an abutting portion 251 and a flat surface portion 252, and the abutting portion 251 is arc-shaped and disposed toward the seal member 23; the plane portions 252 are disposed at two ends of the abutting portion 251, and abut against the second elastic member 22. It will be appreciated that the second elastic element 22 abuts against the flat portion 252 of the calibration washer 25, concentrating the force applied to the sealing element 23 by the abutting portion 251.

Of course, the abutting portion 251 may have other shapes, such as a square abutting portion 251.

In one embodiment, the seal assembly 20 further comprises a protective gasket 26, the protective gasket 26 being located between the seal 23 and the calibration gasket 25, and both sides of the protective gasket 26 abutting against the seal 23 and the calibration gasket 25, respectively. It will be appreciated that the protective gasket 26 increases the contact area of the calibration gasket 25 with the seal 23.

In particular, the two sides of the protective gasket 26 against which the seal 23 and the corrective gasket 25 abut are flat. Originally, the force applied to the sealing element 23 by the second elastic element 22 through the correcting gasket 25 is point contact, and the protective gasket 26 changes the point contact into surface contact, so that the contact area is increased.

As shown in fig. 1, the second core 21 defines a first channel 212; and one end of the first passage 212 communicates with the chamber 24 and the other end communicates with the medium inlet 13. It will be appreciated that the flow of media from the media inlet 13 through the first passage 212 into the chamber 24 serves to equalise the pressures so that the seal 23 is fully press-fitted when the valve port 11 is closed.

When the electromagnetic valve 100 provided by the utility model is powered on, the first iron core 101 adsorbs the second iron core 21 to move upwards along the axial direction of the valve port 11, so that the sealing element 23 moves along the direction away from the valve port 11 to open the valve port 11; the medium flows in from the medium inlet 13, flows into the chamber 24 through the second passage 271, flows from the chamber 24 into the third passage 14, and flows out of the medium outlet 15.

When the power is cut off, the second iron core 21 is reset, so that the sealing piece 23 is reset, and the valve port 11 is closed; the medium can flow from the medium inlet 13 through the first passage 212 into the chamber 24, equalizing the pressure in the chamber 24, and allowing the sealing member 23 to be completely press-fitted when closing the valve port 11.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. A solenoid valve comprising a valve body (10) and a seal assembly (20); the valve body (10) is internally provided with a valve port (11), and the sealing assembly (20) can move close to or away from the valve port (11) to close or open the valve port (11);

the valve is characterized in that at least two annular convex parts (12) arranged around the valve port (11) are arranged in the valve body (10), and the heights of the at least two annular convex parts (12) are equal or unequal along the axial direction of the valve port;

the annular projection (12) is configured to cooperate with the seal assembly (20) to seal the valve port (11) as the seal assembly (20) moves closer to the valve port (11).

2. A solenoid valve according to claim 1, characterised in that at least two of said annular projections (12) have a spacing therebetween.

3. The solenoid valve according to claim 1, wherein the number of the annular protrusions (12) is 2, and 2 of the annular protrusions (12) are a first annular protrusion (121) and a second annular protrusion (122), respectively, the first annular protrusion (121) is arranged around the valve port (11) and is located inside the second annular protrusion (122);

the first annular projection (121) is disposed concentrically with the second annular projection (122).

4. The solenoid valve according to claim 3, characterized in that, in the axial direction of the valve port (11), the height of the first annular protrusion (121) is higher than the height of the second annular protrusion (122); alternatively, the height of the second annular projection (122) is higher than the height of the first annular projection (121).

5. The solenoid valve according to claim 1, characterized in that the solenoid valve further comprises a first iron core (101) and a first elastic member (102), the first iron core (101) and the first elastic member (102) being installed at an end away from the valve port (11); the seal assembly (20) comprises a second plunger (21), the second plunger (21) being located proximate to one end of the valve port (11);

the first elastic piece (102) is arranged between the first iron core (101) and the second iron core (21), one end of the first elastic piece (102) abuts against the first iron core (101), and the other end of the first elastic piece (102) abuts against the second iron core (21).

6. The solenoid valve according to claim 5, characterized in that said sealing assembly (20) further comprises a second elastic element (22), a sealing element (23) and a retaining element (27); the end surface of one end, close to the valve port (11), of the second iron core (21) is provided with a cavity (24) which is provided with an opening (241);

the second elastic piece (22) is arranged in the cavity (24), the sealing piece (23) extends into the cavity (24) from the opening (241) and is arranged in the cavity (24) and abuts against the second elastic piece (22);

the limiting piece (27) is mounted at one end, close to the valve port (11), of the second iron core (21) and used for limiting the sealing piece (23).

7. The solenoid valve according to claim 6, characterized in that said sealing assembly (20) further comprises a calibration gasket (25), said calibration gasket (25) being located between said second elastic member (22) and said sealing member (23), and said calibration gasket (25) being in abutment with said second elastic member (22).

8. The solenoid valve according to claim 7, characterized in that said correction gasket (25) has an abutment portion (251) and a planar portion (252), said abutment portion (251) being of circular arc shape and being set towards said seal (23); the plane parts (252) are arranged at two ends of the abutting part (251) and abut against the second elastic piece (22).

9. The solenoid valve according to claim 8, characterized in that said sealing assembly (20) further comprises a protective gasket (26), said protective gasket (26) being located between said sealing element (23) and said corrective gasket (25), and said protective gasket (26) being in abutment on both sides with said sealing element (23) and with said corrective gasket (25), respectively.

10. The solenoid valve according to claim 6, characterized in that said valve body (10) is provided with a medium inlet (13) and said second core (21) is provided with a first channel (212); and the first channel (212) communicates with the chamber (24) at one end and with the medium inlet (13) at the other end.

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