CN217381638U

CN217381638U - Flow regulating assembly and electronic expansion valve

Info

Publication number: CN217381638U
Application number: CN202220403806.5U
Authority: CN
Inventors: 贺宇辰; 徐冠军; 康志军
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-09-06
Anticipated expiration: 2032-02-25

Abstract

The flow regulating assembly comprises a valve head and a sealing gasket, wherein a sealing surface and a regulating surface are arranged on the valve head, and a sealing matching surface and a flow guide surface are arranged on the sealing gasket; the valve head moves relative to the sealing gasket, so that the adjusting surface can be driven to extend into the channel, and the flow area between the adjusting surface and the sealing matching surface is adjusted to control the flow of a medium in the channel; and, under the drive of valve head, the valve head can cooperate the shutoff passageway with the butt between sealed face and the sealed fitting surface, and the water conservancy diversion face can carry out the water conservancy diversion to the medium of passing through between regulation face and the sealed fitting surface. The utility model discloses can utilize and realize the face between this valve head and the sealed pad and the sealed face of packing, and the flow area between usable control seal fitting surface and the regulation face, flow control when realizing this flow control subassembly low discharge, in this time, the water conservancy diversion face can play the effect of water conservancy diversion and reduction flow resistance, especially reduces the circulation resistance when the maximum aperture.

Description

Flow regulating assembly and electronic expansion valve

Technical Field

The utility model belongs to the technical field of flow control is relevant, especially relate to a flow control assembly and electronic expansion valve.

Background

In the electronic expansion valve, the valve head realizes the change of the flow area by changing the relative position of the valve head and the flow regulating surface of the inner wall of the valve port, thereby realizing the flow regulation. The flow characteristic curve is a relationship between the flow rate of the electronic expansion valve and the opening degree of the valve port (i.e., the moving distance of the valve head). In the actual use process, different systems and use working conditions have different requirements on flow regulation.

At present, the existing electronic expansion valve usually adopts a bell mouth line sealing structure to realize flow plugging, and is realized by a mode that a valve port cone angle on a valve head is abutted against a sealing gasket. However, the sealing structure has poor operational reliability, the sealing gasket has a larger deformation amount due to temperature compared with the valve head, the valve head may be locked due to the change from high temperature to low temperature, the valve opening resistance is increased, and the flow curve may be shifted.

SUMMERY OF THE UTILITY MODEL

Therefore, there is a need for a flow regulating assembly and an electronic expansion valve that solve the above problems.

A flow regulating assembly comprises a valve head and a sealing gasket, wherein a channel is formed in the sealing gasket, and the valve head can move relative to the sealing gasket to regulate the medium flow of the channel;

the valve head is provided with a sealing surface and an adjusting surface, and the sealing gasket is provided with a sealing matching surface and a flow guide surface;

the valve head moves relative to the sealing gasket, so that the adjusting surface can be driven to extend into the channel, and the flow area between the adjusting surface and the sealing matching surface is adjusted to control the flow of a medium in the channel; and under the drive of the valve head, the valve head can be used for plugging the channel by the abutting fit between the sealing surface and the sealing matching surface, and the flow guide surface can guide the flow of a medium passing through the space between the adjusting surface and the sealing matching surface.

It can be understood that, through the structural arrangement of above-mentioned sealed face, water conservancy diversion face, sealed fitting surface and regulation face for this flow control assembly during operation can utilize the butt between sealed face and the sealed fitting surface to realize the face between this valve head and the sealed pad and the sealed face is sealed with the face, and the usable control seals the distance between fitting surface and the regulation face, flow control when realizing this flow control assembly low discharge, here simultaneously, the water conservancy diversion face can play the water conservancy diversion and reduce the effect of flow resistance, especially reduces the circulation resistance when the maximum aperture.

In one embodiment, the flow guiding surface is arranged on the periphery of the adjusting surface along the axial direction of the sealing gasket.

It can be understood that the flow guide surface is arranged at the periphery of the adjusting surface, so that the flow guide surface is arranged on the sealing gasket, and the position of the adjusting surface on the valve head is arranged, so that the flow guide surface can guide media entering between the adjusting surface and the sealing matching surface.

In one embodiment, the flow guiding surface and the adjusting surface are both provided with inclined surface structures, and the inclination angle of the flow guiding surface is larger than that of the adjusting surface relative to the axis of the sealing gasket.

It can be understood that through the structure setting of above-mentioned water conservancy diversion face and regulation face, specifically realize the regulation face on the valve head, and the structure setting of water conservancy diversion face on sealed the pad to satisfy the regulation face can with the sealed fitting surface cooperation of seal pad and realize the flow control when little flow, and the water conservancy diversion face can play the water conservancy diversion and reduce the user demand of flow resistance.

In one embodiment, the adjusting surface comprises a plurality of adjusting section surfaces which are connected in sequence.

It will be appreciated that one embodiment of the adjustment surface is achieved by the structural arrangement of the plurality of adjustment section surfaces described above.

In one embodiment, the sealing surface and the sealing mating surface are both arranged in a planar structure.

It will be appreciated that the structural arrangement of the sealing face and the seal engaging face is embodied by the structural arrangement described above.

In one embodiment, the flow guide surface is provided as a planar structure.

It will be appreciated that an embodiment of the flow guiding surface is embodied by providing the flow guiding surface as a planar structure.

In one embodiment, the flow guide surface is disposed at the periphery of the sealing engagement surface.

It will be appreciated that the positional relationship of the deflector surface and the seal engagement surface on the gasket is particularly realized by the above-described structural arrangement.

In one embodiment, the sealing gasket is provided with a clearance gap, and the clearance gap is arranged at a part where the sealing matching surface is connected with the channel wall of the channel.

It can be understood that, through the structure setting of above-mentioned keep away the gap, can increase the space between regulation face and the sealed pad on the valve head to this guarantees that the medium can be in the water conservancy diversion of water conservancy diversion face and enters into to the passageway through between regulation face and the sealed fitting surface, avoids this being in to produce burr or turn-ups influence face seal man-hour simultaneously.

In one embodiment, the valve head is provided with a clearance groove, and the clearance groove is arranged between the sealing surface and the adjusting surface.

It can be understood that through the structural arrangement of the clearance groove, the sealing of the surface can be realized, and the clearance groove can be avoided when the valve head is turned over or burrs are formed in the machining process, so that the sealing effect of the surface is prevented from being influenced.

The application also requests to protect an electronic expansion valve, which comprises a valve body and a flow regulating assembly, wherein the flow regulating assembly is arranged on the valve body, and the flow regulating assembly is set to be any one of the flow regulating assemblies.

It can be understood that through the reasonable structure arrangement of the flow regulating assembly, the electronic expansion valve realizes surface-to-surface contact sealing, so that the sealing effect of the electronic expansion valve during working is ensured, and meanwhile, the electronic expansion valve can realize flow regulation at small flow.

Drawings

Fig. 1 is a schematic structural diagram of an electronic expansion valve provided in the present application.

Fig. 2 is a schematic structural diagram of a flow regulating assembly provided in the present application.

Fig. 3 is a partial structure diagram of the valve head in the application.

Fig. 4 and 5 are partial structural schematic views of a valve head in another embodiment of the present application.

Fig. 6 is a schematic view of the structure of the gasket of the present application.

10, a valve head; 11. a sealing surface; 12. adjusting the surface; 121. adjusting the section surface; 13. avoiding a void groove; 20. a gasket; 201. a channel; 2011. a channel wall; 21. sealing the mating surface; 22. a flow guide surface; 23. avoiding a gap; 200. a valve body; 210. and (4) valve ports.

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 "on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements 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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the electronic expansion valve provided in the present application includes a valve body 200 and a flow rate adjusting assembly, wherein the flow rate adjusting assembly is mounted on the valve body 200 and is used for adjusting a flow rate of a medium passing through a valve port 210 of the valve body 200 on the valve body 200, so as to achieve a purpose of adjusting the flow rate when the electronic expansion valve works.

As shown in fig. 2 to fig. 6, the flow rate adjusting assembly provided by the present application includes a valve head 10 and a gasket 20, wherein a channel 201 is formed on the gasket 20, and the valve head 10 can move relative to the gasket 20 to adjust a medium flow rate of the channel 201. It should be noted that, when the flow rate adjusting assembly is applied to an electronic expansion valve, the gasket 20 in the flow rate adjusting assembly is installed at the position of the valve port 210 of the valve body 200, and the channel 201 is communicated with the valve port 210, so that the valve head 10 adjusts the flow rate of the channel 201 on the gasket 20, that is, the adjustment of the medium flow rate during the operation of the electronic expansion valve can be realized.

In an embodiment, the valve head 10 of this embodiment is provided with the sealing surface 11 and the adjusting surface 12, and the sealing gasket 20 is provided with the sealing mating surface 21 and the flow guiding surface 22, so that the valve head 10 moves relative to the sealing gasket 20, and the adjusting surface 12 can be driven to extend into the channel 201, and the flow area between the adjusting surface 12 and the sealing mating surface 21 is adjusted, so as to control the flow rate of the medium in the channel 201; and under the drive of valve head 10, valve head 10 can use the butt cooperation shutoff passageway 201 between sealed face 11 and the sealed fitting surface 21, and water conservancy diversion face 22 can be to passing through between regulation face 12 and the sealed fitting surface 21 and entering the medium of passageway 201 and leading water. The flow area is, specifically, the minimum passage area between the adjusting surface 12 and the seal mating surface 21 for passing the medium.

As can be seen from the above, when the flow rate adjusting assembly is operated, the contact between the sealing surface 11 and the sealing matching surface 21 can be used to realize the surface-to-surface sealing between the valve head 10 and the sealing pad 20, and the flow rate adjusting assembly can realize the flow rate adjustment when the flow rate is small by controlling the flow area between the adjusting surface 12 and the sealing matching surface 21, and meanwhile, the adjusting surface 12 can play a role in guiding flow and reducing flow resistance, especially reducing flow resistance when the opening is maximum.

The flow guide surface 22 is disposed on the periphery of the adjusting surface 12 along the axial direction of the sealing gasket 20, so that the flow guide surface 22 is disposed on the sealing gasket 20 and the adjusting surface 12 is disposed on the valve head 10, thereby ensuring that the flow guide surface 22 can guide the medium entering between the adjusting surface 12 and the sealing matching surface 21.

The adjusting surface 12 and the flow guiding surface 22 of this embodiment are both set to be inclined plane structures, and for the axis of the sealing gasket 20, the inclination angle of the flow guiding surface 22 is greater than the inclination angle of the adjusting surface 12, thereby specifically realizing the arrangement of the flow guiding surface 22 on the sealing gasket 20, and the structure arrangement of the adjusting surface 12 on the valve head 10, so as to satisfy the flow regulation when the adjusting surface 12 can be matched with the sealing matching surface 21 on the sealing gasket 20 and realize small flow, and the use requirement of the flow guiding surface 22 can be played for flow guiding and flow resistance reduction.

In particular, the adjustment surface 12 is provided as a complete bevel, which has a simplified structure and facilitates the production and preparation of the valve head 10.

It should be noted that the adjusting surface 12 is not limited to the above-mentioned integral inclined surface structure, and for those skilled in the art, the adjusting surface 12 includes a plurality of adjusting sectional surfaces 121, and the adjusting sectional surfaces 121 are connected in sequence, that is, the inclination angle of each adjusting sectional surface 121 is different, so that two adjacent adjusting sectional surfaces 121 are connected at a certain angle.

The sealing surface 11 and the sealing matching surface 21 are both arranged in a plane structure, so that the structural arrangement of the sealing surface 11 and the sealing matching surface 21 is realized. It should be noted that the sealing surface 11 and the sealing engagement surface 21 are not limited to those shown in the drawings, and it is obvious to those skilled in the art that the sealing surface 11 and the sealing engagement surface 21 may be configured as mutually matching inclined surfaces, and will not be described herein.

The guiding surface 22 is disposed at the periphery of the sealing engagement surface 21, so as to realize the positional relationship between the guiding surface 22 and the sealing engagement surface 21 on the gasket 20.

Of course, the diversion surface 22 is not limited to the inclined surface, and it is obvious to those skilled in the art that the diversion surface 22 may be configured as a plane structure, so as to implement an embodiment of the diversion surface 22.

In addition, the sealing gasket 20 of the present application is provided with the clearance gap 23, and the clearance gap 23 is arranged at a position where the sealing matching surface 21 is connected with the channel wall 2011 of the channel 201, so that a space between the adjusting surface 12 and the sealing gasket 20 on the valve head 10 can be increased, so that a medium can pass through between the adjusting surface 12 and the sealing matching surface 21 and enter the channel 201 under the flow guidance of the flow guiding surface 22, and meanwhile, the situation that the surface sealing is affected by burrs or flanging generated during the processing is avoided.

In this application, the valve head 10 is provided with the clearance groove 13, and the clearance groove 13 is arranged at a position between the sealing surface 11 and the adjusting surface 12, so that the sealing of the surface can be realized, and the clearance groove can be avoided when the valve head 10 is machined to form a turnover or burr, so that the sealing effect of the surface is prevented from being influenced.

To sum up, the electronic expansion valve with the flow regulating assembly is used for realizing surface-to-surface contact sealing, so that the sealing effect of the electronic expansion valve during working is ensured, and meanwhile, the electronic expansion valve realizes the flow regulating effect during small flow.

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

1. A flow regulating assembly comprises a valve head (10) and a sealing gasket (20), wherein a channel (201) is formed in the sealing gasket (20), and the valve head (10) can move relative to the sealing gasket (20) to regulate the medium flow of the channel (201);

the valve head is characterized in that a sealing surface (11) and an adjusting surface (12) are arranged on the valve head (10), and a sealing matching surface (21) and a flow guide surface (22) are arranged on the sealing gasket (20);

the valve head (10) moves relative to the sealing gasket (20), so that the adjusting surface (12) can be driven to extend into the channel (201), and the flow area between the adjusting surface (12) and the sealing matching surface (21) is adjusted to control the flow rate of a medium in the channel (201); and under the driving of the valve head (10), the valve head (10) can seal the channel (201) by the abutting fit between the sealing surface (11) and the sealing matching surface (21), and the flow guide surface (22) can guide the flow of the medium passing through the space between the adjusting surface (12) and the sealing matching surface (21).

2. Flow regulating assembly according to claim 1, characterized in that the flow guiding surface (22) is provided at the periphery of the regulating surface (12) in the axial direction of the sealing gasket (20).

3. Flow regulating assembly according to claim 1, characterized in that the flow guiding surface (22) and the regulating surface (12) are both provided as a bevelled configuration, and that the angle of inclination of the flow guiding surface (22) is greater than the angle of inclination of the regulating surface (12) with respect to the axis of the sealing gasket (20).

4. Flow rate regulating assembly according to claim 1, characterized in that said regulating surface (12) comprises a plurality of regulating sector surfaces (121), said plurality of regulating sector surfaces (121) being connected in series.

5. A flow regulating assembly according to claim 1, characterized in that the sealing surface (11) and the sealing counterface (21) are both provided as a planar structure.

6. A flow regulating assembly according to claim 1, characterized in that the flow guiding surface (22) is provided as a planar structure.

7. Flow regulating assembly according to claim 1, characterized in that the flow guiding surface (22) is provided at the periphery of the sealing and mating surface (21).

8. The flow regulating assembly according to claim 1, characterized in that the sealing gasket (20) is provided with a clearance gap (23), and the clearance gap (23) is provided at a portion where the sealing matching surface (21) is connected with the passage wall (2011) of the passage (201).

9. A flow regulating assembly according to claim 1, characterized in that the valve head (10) is provided with a clearance groove (13), the clearance groove (13) being provided at a position between the sealing surface (11) and the regulating surface (12).

10. An electronic expansion valve comprising a valve body (200), and a flow regulating assembly mounted on said valve body (200), characterized in that said flow regulating assembly is provided as a flow regulating assembly according to any one of claims 1-9.