CN215110536U

CN215110536U - Flow regulating valve

Info

Publication number: CN215110536U
Application number: CN202121318810.3U
Authority: CN
Inventors: 詹少军; 贺宇辰
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-12-10
Anticipated expiration: 2031-06-11

Abstract

The utility model provides a flow regulating valve, flow regulating valve includes valve body and valve head, and the valve body has the valve port, and the inner wall of valve port has sealed face and first flow control face, and the contained angle between the axis of sealed face and valve port is c, and the contained angle between the axis of first flow control face and valve port is b, and wherein, c > b, c is more than or equal to 5 degrees and less than or equal to 85 degrees, and 0 is more than or equal to b and less than or equal to 20 degrees; the valve head is movably arranged in the valve body to close or open the valve port, wherein when the valve port is closed, the valve head is abutted with the sealing surface. By adopting the scheme, the small flow regulation can be carried out by adjusting the relative position of the valve head and the first flow regulation surface, and the valve port is closed by matching the sealing surface and the valve head when the valve port is closed, rather than the flow regulation surface. Flow control's face and sealed face set up alone promptly in this application, compare with prior art, when having avoided adjusting the low discharge value, the dead condition of card appears in the valve head easily, has guaranteed flow control valve's result of use.

Description

Flow regulating valve

Technical Field

The utility model relates to a flow control valve technical field particularly, relates to a flow control valve.

Background

In the flow regulating valve, the valve head realizes the change of the flow area by changing the relative position of 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 flow rate adjustment valve and the opening degree of the valve port (i.e., the movement distance of the valve head). In the actual use process, different systems and use working conditions have different requirements on flow regulation.

In the prior art, in order to meet the requirement of small flow regulation, the angle of a flow regulation surface relative to the axis of a valve port is set to be smaller, the flow regulation surface is used as a regulation surface and a matching surface for closing the valve port, and when the small flow value is required to be regulated, the valve head and the flow regulation surface are easy to block, so that the normal use is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flow control valve to when realizing little flow control, avoid the valve head card to die, guarantee the result of use.

In order to achieve the above object, the utility model provides a flow control valve, include: the valve comprises a valve body, wherein the valve body is provided with a valve port, the inner wall of the valve port is provided with a sealing surface and a first flow regulating surface, the included angle between the sealing surface and the axis of the valve port is c, the included angle between the first flow regulating surface and the axis of the valve port is b, c is more than or equal to 5 degrees and less than or equal to 85 degrees, and b is more than or equal to 0 and less than or equal to 20 degrees; the valve head is movably arranged in the valve body to close or open the valve port, and when the valve port is closed, the valve head is abutted to the sealing surface.

Furthermore, the minimum clearance between the first flow regulating surface and the valve head is L which is more than or equal to 0.01 mm.

Furthermore, the inner wall of the valve port is also provided with a second flow regulating surface, the second flow regulating surface is positioned on one side, far away from the sealing surface, of the first flow regulating surface, an included angle between the second flow regulating surface and the axis of the valve port is a, and a is greater than or equal to 0 and less than 90 degrees.

Further, b is 0, 0< a <90 °.

Alternatively, 0< b ≦ 20 ° and a ≦ 0.

Or 0< b < 20 DEG, b < a <90 deg.

Or 0< b < 20 DEG, 0< a < b.

Further, the seal surface, the first flow rate regulation surface, and the second flow rate regulation surface are all tapered surfaces.

Further, the sealing surface is a conical surface, the first flow regulating surface is a rotating curved surface, and an included angle between a generatrix of the rotating curved surface and the axis of the valve port is b.

Further, the valve body comprises a seat body and a core body, the core body is detachably arranged in the seat body, and the core body is provided with the valve port.

Further, c is more than or equal to 30 degrees and less than or equal to 60 degrees.

The technical scheme of the utility model is applied, a flow control valve is provided, the flow control valve includes a valve body and a valve head, the valve body has a valve port, the inner wall of the valve port has a sealing surface and a first flow control surface, the included angle between the sealing surface and the axis of the valve port is c, the included angle between the first flow control surface and the axis of the valve port is b, wherein c is more than b, c is more than or equal to 5 degrees and less than or equal to 85 degrees, b is more than or equal to 0 and less than or equal to 20 degrees; the valve head is movably arranged in the valve body to close or open the valve port, wherein when the valve port is closed, the valve head is abutted with the sealing surface. By adopting the scheme, the sealing surface and the first flow regulating surface are arranged, and the angle range is limited, so that small-flow regulation can be carried out by adjusting the relative position of the valve head and the first flow regulating surface, and the valve port is closed by matching the sealing surface and the valve head when the valve port is closed, rather than the flow regulating surface. Flow control's face and sealed face set up alone promptly in this application, compare with prior art, when having avoided adjusting the low discharge value, the dead condition of card appears in the valve head easily, has guaranteed flow control valve's result of use.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a cross-sectional view of a flow control valve according to an embodiment of the present invention;

FIG. 2 illustrates an enlarged view of the flow regulator valve of FIG. 1 at the valve port location;

fig. 3 is an enlarged view of a flow control valve provided in a second embodiment of the present invention at a valve port position;

fig. 4 is an enlarged view of a flow control valve provided in a third embodiment of the present invention at the valve port position;

fig. 5 is an enlarged view of a flow control valve provided in accordance with a fourth embodiment of the present invention at the valve port position;

fig. 6 is an enlarged view of a flow control valve provided in accordance with a fifth embodiment of the present invention at the valve port position;

FIG. 7 shows an enlarged view of a flow control valve provided in accordance with a sixth embodiment of the present invention at the valve port location;

fig. 8 shows a cross-sectional view of a flow control valve according to a seventh embodiment of the present invention;

fig. 9 shows a schematic flow characteristic curve diagram of a flow rate regulating valve according to a fourth embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a valve port; 12. a sealing surface; 13. a first flow regulating surface; 14. a second flow regulating surface; 15. a base body; 16. a core body; 20. a valve head.

Detailed Description

The technical solution 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. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 2, an embodiment of the present invention provides a flow control valve, including: the valve comprises a valve body 10, wherein the valve body 10 is provided with a valve port 11, the inner wall of the valve port 11 is provided with a sealing surface 12 and a first flow regulating surface 13, the included angle between the sealing surface 12 and the axis of the valve port 11 is c, and the included angle between the first flow regulating surface 13 and the axis of the valve port 11 is b, wherein c is more than b, c is more than or equal to 5 degrees and less than or equal to 85 degrees, and b is more than or equal to 0 and less than or equal to 20 degrees; and a valve head 20 movably arranged in the valve body 10 to close or open the valve port 11, wherein the valve head 20 is abutted with the sealing surface 12 when the valve port 11 is closed.

With this arrangement, by providing the sealing surface 12 and the first flow rate regulation surface 13 and defining the angular range and angular relationship, small flow rate regulation can be performed by adjusting the relative positions of the valve head 20 and the first flow rate regulation surface 13, and closing of the valve port 11 is achieved by cooperation of the sealing surface 12 and the valve head 20 when the valve port 11 is closed, rather than by the flow rate regulation surface. In the present application, since c > b, the area of the minimum opening of the sealing surface 12 is smaller than the area of the minimum opening of the first flow rate adjustment surface 13, so that the valve head 20 is easily brought into contact with the sealing surface 12 to seal during movement, and is not completely brought into contact with and stuck to the first flow rate adjustment surface 13. The face that will flow control sets up separately with sealed face promptly in this application, and sealed face 12 is used for sealing, and first flow control face 13 is used for adjusting the flow, compares with prior art, when having avoided adjusting the low discharge value, and the dead condition of card appears easily in valve head 20, has guaranteed flow control valve's result of use.

The flow rate control valve may be specifically used as a valve such as an electronic expansion valve. In some usage scenarios, it is desirable that the flow regulating valve has a very small flow at the front section and a very large flow at the rear section. Adopt the scheme in this application, flow control valve anterior segment can be regarded as electronic expansion valve and use, and the back end is opened entirely and is done the solenoid valve, can be in the same place the electronic expansion valve that adopts and ally oneself with in the prior art and solenoid valve like this, and two valves in the prior art can be replaced to a valve in this application promptly, the cost is reduced. Or, flow control valve in this application still can be used on low ring temperature unit, and the typical flow characteristic requirement of low ring temperature unit is the broken line type, and the anterior segment low temperature heats usefulness promptly, requires flow accurate adjustment, can better stable operating mode like this, back end refrigeration usefulness, and the flow value is great, needs more large-traffic characteristic. Therefore, the flow regulating valve provided by the scheme can realize specific flow regulation and meet the use requirement.

Wherein the minimum value of the angle c between the sealing surface 12 and the axis of the valve port 11 is set to 5 deg., which results in better sealing performance. The maximum value of an included angle c between the sealing surface 12 and the axis of the valve port 11 is set to be 85 degrees, so that the length of a flow section at the sealing surface 12 can be effectively reduced, and the influence of the sealing surface 12 on the flow at the first flow regulating surface 13 is reduced.

Preferably, c is 30 DEG-60 deg. Therefore, the sealing effect can be better achieved, and meanwhile, the better flow regulation effect is realized.

In this embodiment, there is a gap between the first flow regulating surface 13 and the valve head 20 to avoid jamming of the valve head 20. The included angle b between the first flow regulating surface 13 and the axis of the valve port 11 can be set to 0 degree, so that the flow is available when the flow regulating valve is totally closed, and the flow value at the totally closed position is more stable. When b is larger than 20 degrees, the included angle between the first flow regulating surface 13 and the valve head 20 is larger, so that the defects of jamming and the like are not easy to occur, and the function of the sealing surface 12 is reduced at the moment. Therefore, in the scheme, the included angle between the first flow regulating surface 13 and the axis of the valve port 11 is set to be more reasonable, and b is more than or equal to 0 and less than or equal to 20 degrees.

Further, the minimum clearance between the first flow rate adjustment surface 13 and the valve head 20 is L, L is more than or equal to 0.01 mm. Through the arrangement, when the valve head 20 is matched with the first flow regulating surface 13 for flow regulation, a sufficient gap is ensured between the valve head 20 and the first flow regulating surface 13, so that the clamping is avoided. Wherein L may be set to 1mm or less. Specifically, L is more than or equal to 0.1 mm.

In the embodiment, the inner wall of the valve port 11 further has a second flow rate adjusting surface 14, the second flow rate adjusting surface 14 is located on the side, away from the sealing surface 12, of the first flow rate adjusting surface 13, and the included angle between the second flow rate adjusting surface 14 and the axis of the valve port 11 is a, where a is greater than or equal to 0 and less than 90 °. By providing the second flow rate adjustment surface 14, when the valve head 20 moves from a position cooperating with the first flow rate adjustment surface 13 to a position cooperating with the second flow rate adjustment surface 14, the slope of the flow rate characteristic curve changes, i.e. the function of flow rate adjustment is enriched, so as to meet different use requirements. For example, the valve head 20 is small flow rate adjustment when it engages the first flow rate adjustment surface 13, and large flow rate adjustment when the valve head 20 engages the second flow rate adjustment surface 14.

In the present application, the angle b of the first flow amount regulation surface 13 and the angle a of the second flow amount regulation surface 14 may be set to different angle ranges according to different use requirements, and the relationship between the two may be defined.

For example, as shown in fig. 3, in example two, b is 0, and 0< a <90 °.

As shown in fig. 4, in example three, 0< b ≦ 20 ° and a ≦ 0.

As shown in FIG. 5, in the fourth embodiment, 0< b.ltoreq.20, b < a < 90. As shown in fig. 9, a flow rate characteristic curve of the flow rate control valve is shown. As can be seen from the figure, the flow characteristic curve is a zigzag shape, there is no flow when the valve head 20 contacts the sealing surface 12 (when the valve head 20 just leaves the sealing surface 12 and reaches a certain flow before the first flow regulating surface 13, this flow is extremely small, does not belong to the regulating action, is a certain flow that objectively exists), the stage where the valve head 20 cooperates with the first flow regulating surface 13 is a front stage, the slope of the front stage is small, and the flow precision regulation can be realized, the stage where the valve head 20 cooperates with the second flow regulating surface 14 is a rear stage, and the slope of the rear stage is large, and the large flow can be realized.

As shown in FIG. 6, in the fifth embodiment, 0< b.ltoreq.20, 0< a < b.

In the above embodiment, the seal surface 12, the first flow rate regulation surface 13, and the second flow rate regulation surface 14 are all tapered surfaces. This facilitates the machining and allows a precise adjustment of the flow rate. Further, the borderlines of the seal surface 12, the first flow rate adjustment surface 13, and the second flow rate adjustment surface 14 are connected in order, so that smooth transition is possible at the time of flow rate adjustment.

As shown in fig. 7, in the sixth embodiment, the sealing surface 12 is a tapered surface, the first flow rate adjustment surface 13 is a curved surface of revolution, and an angle b is formed between a generatrix of the curved surface of revolution and the axis of the valve port 11. With this arrangement, when the valve head 20 moves in the axial direction, since the first flow regulating surface 13 is a rotating curved surface, non-linear regulation or variable speed regulation can be realized to meet the use requirement.

Further, in the seventh embodiment, unlike the above-described embodiments, the valve body 10 includes a seat body 15 and a core 16, the core 16 is detachably disposed in the seat body 15, and the core 16 has the valve port 11. That is, the core 16 with the valve port 11 can be removed, so that the core 16 with different valve ports 11 can be replaced independently for different flow characteristic requirements. Therefore, the application range of the flow regulating valve is greatly improved, all parts are not required to be replaced when the design is changed, only the valve port 11 is required to be redesigned, the universality of the parts is improved, and the design and manufacturing cost is reduced.

Optionally, the seat body 15 has a first limit step, the core body 16 has a second limit step, and the first limit step and the second limit step are in limit fit, so that the positioning and the assembling are convenient.

The flow control valve still includes: the guide sleeve is arranged in the valve body 10, the valve head 20 is movably arranged in the guide sleeve, and a sealing structure is arranged between the valve head 20 and the guide sleeve; the driving part, the driving part and the valve head 20 are in driving connection to drive the valve head 20 to move.

Specifically, the flow regulating valve is an electronic expansion valve.

In the present application, by providing the sealing surface 12 and the first flow rate adjustment surface 13 and defining the angular range and angular relationship, it is possible to perform small flow rate adjustment by adjusting the relative positions of the valve head 20 and the first flow rate adjustment surface 13, and to achieve closing of the valve port 11 by cooperation of the sealing surface 12 and the valve head 20 when closing the valve port 11, rather than by the flow rate adjustment surface. The face of flow control and sealed face separately set up in this application promptly, compare with prior art, when having avoided adjusting the low discharge value, the dead condition of card appears in valve head 20 easily, has guaranteed electronic expansion valve's result of use.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

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.

Claims

1. A flow control valve, comprising:

the valve body (10) is provided with a valve port (11), the inner wall of the valve port (11) is provided with a sealing surface (12) and a first flow regulating surface (13), an included angle between the sealing surface (12) and the axis of the valve port (11) is c, an included angle between the first flow regulating surface (13) and the axis of the valve port (11) is b, wherein c is larger than b, c is larger than or equal to 5 degrees and smaller than or equal to 85 degrees, and b is larger than or equal to 0 degrees and smaller than or equal to 20 degrees;

a valve head (20) movably arranged in the valve body (10) to close or open the valve port (11), wherein the valve head (20) and the sealing surface (12) are abutted when the valve port (11) is closed.

2. A flow regulating valve according to claim 1, characterised in that the minimum clearance between the first flow regulating surface (13) and the valve head (20) is L ≧ 0.01 mm.

3. A flow regulating valve according to claim 1, characterized in that the inner wall of the valve port (11) further has a second flow regulating surface (14), the second flow regulating surface (14) being located on the side of the first flow regulating surface (13) remote from the sealing surface (12), the angle between the second flow regulating surface (14) and the axis of the valve port (11) being a, 0 ≦ a <90 °.

4. Flow regulating valve according to claim 3,

b＝0，0<a<90°。

5. flow regulating valve according to claim 3,

0<b≤20°，a＝0。

6. flow regulating valve according to claim 3,

0<b≤20°，b<a<90°。

7. flow regulating valve according to claim 3,

0<b≤20°，0<a<b。

8. a flow regulating valve according to claim 3, characterised in that the sealing surface (12), the first flow regulating surface (13) and the second flow regulating surface (14) are all conical surfaces.

9. A flow regulating valve according to claim 1, characterized in that the sealing surface (12) is a conical surface and the first flow regulating surface (13) is a surface of revolution, the angle between the generatrix of which and the axis of the valve port (11) is b.

10. A flow regulating valve in accordance with claim 1, wherein the valve body (10) comprises a seat (15) and a core (16), the core (16) being removably disposed within the seat (15), the core (16) having the valve port (11).

11. A flow regulating valve as claimed in claim 1, characterized in that c is 30 ° ≦ 60 °.