CN216742844U - Electric valve - Google Patents

Abstract

The utility model provides an electric valve, which comprises a valve seat, a valve needle, a first valve core and a second valve core; the valve seat is provided with a valve cavity; the valve needle is movably arranged in the valve cavity; the first valve core is arranged in the valve cavity and provided with a first through hole, the first valve core is made of non-metal materials, and the first valve core is positioned between the valve needle and the opening of the valve cavity; the second valve core is arranged in the valve cavity and provided with a second through hole, the second valve core is made of metal materials, the second valve core is arranged adjacent to one side of the first valve core, which faces the valve needle, and the second through hole and the first through hole form a valve port together; when the electric valve is in a fully closed state, the valve needle penetrates through the second through hole and contacts with the hole wall of the first through hole to form sealing.

Description

Electric valve

Technical Field

The utility model relates to an electric valve technical field especially relates to an electric valve.

Background

The existing electric valve usually adopts soft sealing to realize the sealing of the valve port in order to avoid the leakage problem of the valve port. However, the valve cartridge of the existing electric valve has the following disadvantages due to the above design: the soft sealing valve port is difficult to realize flow regulation and has large processing difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcomes above-mentioned prior art's at least defect, provides one kind under the prerequisite of the sealed effect of guaranteeing the valve port, can satisfy the electric valve of flow control demand.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the present invention, there is provided an electrically operated valve, wherein the electrically operated valve comprises a valve seat, a valve needle, a first valve element and a second valve element; the valve seat is provided with a valve cavity; the valve needle is movably arranged in the valve cavity; the first valve core is arranged in the valve cavity and provided with a first through hole which is made of non-metal materials, and the first valve core is positioned between the valve needle and an opening of the valve cavity; the second valve core is arranged in the valve cavity and provided with a second through hole, the material of the second valve core is a metal material, the second valve core is arranged adjacent to one side of the first valve core, which faces the valve needle, and the second through hole and the first through hole form a valve port together; when the electric valve is in a fully closed state, the valve needle penetrates through the second through hole and contacts with the hole wall of the first through hole to form sealing.

According to one embodiment of the present invention, the inner diameter of the valve port facing the port of the valve needle is larger than the inner diameter facing away from the port of the valve needle, and the inner wall of the valve port is two, the port is in smooth transition.

According to one embodiment of the present invention, the inner diameter of the first through hole facing the orifice of the valve needle is smaller than or equal to the inner diameter of the second through hole facing away from the orifice of the valve needle.

According to one embodiment of the present invention, the inner diameter of the first through hole facing the orifice of the valve needle is larger than the inner diameter of the orifice facing away from the valve needle, and the wall of the first through hole smoothly transitions between the two orifices; and/or the inner diameter of the second through hole facing to the orifice of the valve needle is larger than the inner diameter of the orifice facing away from the valve needle, and the hole wall of the second through hole smoothly transitions between the two orifices.

According to one embodiment of the present invention, the inner wall of the valve port is in the shape of an inclined plane or an arc surface.

According to one of the embodiments of the present invention, along the axial direction of the valve seat, the thickness of the first valve element is greater than the thickness of the second valve element.

According to one embodiment of the present invention, the first valve element is provided with a first annular groove on a periphery of a side orifice of the first through hole facing away from the valve needle.

According to one embodiment of the present invention, the second valve core is formed with a second annular groove at a periphery of one side orifice of the second through hole facing the valve needle.

According to one embodiment of the present invention, the first valve core is made of PTFE, PPS, PEAK, or nylon; and/or the second valve core is made of stainless steel.

According to one embodiment of the present invention, the electrically operated valve further comprises a spool sleeve; the valve core sleeve is partially arranged in the valve cavity and is adjacently arranged on one side of the first valve core, which is back to the valve needle, and the valve core sleeve is provided with a through channel which is communicated with the valve port.

According to the above technical scheme, the utility model provides an electric valve's advantage lies in with positive effect:

the utility model provides an electric valve adopts the design that first case and second case combined to form the valve port, chooses for use non-metallic material through first case for use for first case and needle when contacting, can realize the soft contact of needle and first case, thereby guarantees good sealed effect between needle and the valve port. On this basis, through the second valve core, the metal material is selected for use, and the characteristics that the metal material is difficult to be influenced by environmental factors such as temperature are utilized, the inclination or radian that needs can be processed at the inner wall of the second valve core, so that the second valve core can meet the demand of flow regulation of a specific flow curve, and the regulation precision of the electric valve is further improved.

Drawings

The various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

FIG. 1 is an exploded perspective view of an electrically operated valve according to an exemplary embodiment;

FIG. 2 is a schematic cross-sectional view of the electrically operated valve shown in FIG. 1;

fig. 3 is an enlarged cross-sectional view of a partial structure of the electrically operated valve shown in fig. 2;

FIG. 4 is an exploded schematic view of a portion of the structure shown in FIG. 3;

fig. 5 is an enlarged schematic view of a portion a of fig. 3.

The reference numerals are explained below:

100. a valve seat;

110. a valve cavity;

120. a flow-through hole;

200. a valve needle;

210. a balancing channel;

310. a first valve spool;

311. a first through hole;

312. a first annular groove;

320. a second valve spool;

321. a second through hole;

322. a second annular groove;

400. a valve core sleeve;

510. installing a base body;

520. a sleeve;

610. a rotor assembly;

620. a nut assembly;

630. a screw;

640. a spring housing;

641. a balance hole;

650. a spring;

660. a rotating member;

x. axial direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments, and its several details are capable of modification in various other respects, all without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.

Referring to fig. 1, a three-dimensional exploded schematic view of an electric valve according to the present invention is representatively illustrated. In this exemplary embodiment, the electric valve proposed by the present invention is described by taking an electronic expansion valve as an example. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the inventive concepts described herein to other types of electrically operated valves or other valve arrangements, and such changes are within the scope of the principles of the presently disclosed electrically operated valves.

As shown in fig. 1, in the present embodiment, the electric valve according to the present invention includes a valve seat 100, a valve needle 200, a first valve element 310, and a second valve element 320. Referring to fig. 2-5, a schematic cross-sectional view of an electrically operated valve embodying the principles of the present invention is representatively illustrated in fig. 2; an enlarged schematic cross-sectional view of a portion of the structure of an electrically operated valve embodying the principles of the present invention is representatively illustrated in fig. 3; an exploded schematic view of a portion of the structure shown in FIG. 3 is representatively illustrated in FIG. 4; an enlarged schematic view of portion a of fig. 3 is representatively illustrated in fig. 5. The structure, connection mode and functional relationship of the main components of the electric valve according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, in the present embodiment, the valve seat 100 has a valve cavity 110. The valve needle 200 is movably arranged in the valve chamber 110 and can be driven by a drive mechanism such that the valve needle 200 can move in the axial direction X of the valve seat 100. The first valve core 310 is disposed in the valve cavity 110 and has a first through hole 311, the first valve core 310 is made of a non-metallic material, and the first valve core 310 is located between the valve needle 200 and the opening of the valve cavity 110. The second valve element 320 is disposed in the valve chamber 110 and has a second through hole 321, the material of the second valve element 320 is a metal material, and the second valve element 320 is disposed adjacent to a side of the first valve element 310 facing the valve needle 200. The second through hole 321 and the first through hole 311 together form a valve port of the electric valve. Accordingly, in the fully closed state of the electrically operated valve, the valve needle 200 passes through the second through hole 321 and contacts with the wall of the first through hole 311 to form a seal. The utility model discloses a design that first case 310 and second case 320 combined together forms the valve port, chooses for use non-metallic material through first case 310 for when first case 310 contacts with needle 200, can realize the soft contact of needle 200 with first case 310, thereby guarantee good sealed effect between needle 200 and the valve port. The second valve core 320 is made of metal materials, and the metal materials are difficult to be influenced by environmental factors such as temperature, so that the second valve core 320 can be conveniently processed into a required shape to meet the requirement of flow regulation, and the regulation precision of the electric valve is further improved.

Specifically, as shown in fig. 2, 3 and 5, in the present embodiment, the inner diameter of the port of the valve port facing the valve needle 200 may be larger than the inner diameter of the port of the valve port facing away from the valve needle 200. On the basis, the inner wall of the valve port can be in smooth transition between the two ports, and the smooth transition can prevent the flow change from forming a large instantaneous change during opening and closing of the valve.

Further, as shown in fig. 5, based on the above design of the valve port, in the present embodiment, the inner wall of the second through hole 321 may be substantially inclined, that is, the cross-sectional shape of the flow rate adjusting section of the valve port is substantially inclined. In some embodiments, the inner wall of the valve port may also have other smooth transition structures, such as a substantially arc-shaped structure, i.e., the cross-sectional shape of the valve port is substantially curved, but not limited thereto.

In some embodiments, the inner wall of the second through hole 321 includes a plurality of inclined surfaces with different slopes or a plurality of curved surfaces with different radians to meet the requirements of different flow curves.

Further, as shown in fig. 5, based on the above design of the valve port, in the present embodiment, the inner diameter of the first through hole 311 toward the orifice of the valve needle 200 may be equal to the inner diameter of the second through hole 321 away from the orifice of the valve needle 200. In some embodiments, the inner diameter of the first through hole 311 facing the orifice of the valve needle 200 may also be slightly smaller than the inner diameter of the second through hole 321 facing away from the orifice of the valve needle 200, which is not limited thereto.

Further, as shown in fig. 5, based on the above design of the valve port, in the present embodiment, the inner diameter of the first through hole 311 toward the orifice of the valve needle 200 may be larger than the inner diameter of the orifice away from the valve needle 200. On the basis, the wall of the first through hole 311 may have a smooth transition between the two openings.

Further, as shown in fig. 5, based on the above design of the first through hole 311, in the present embodiment, the inner wall of the first through hole 311 may be substantially inclined, that is, the cross-sectional shape of the first through hole 311 is substantially diagonal. In some embodiments, the inner wall of the first through hole 311 may also have other smooth transition structures, such as a substantially arc-shaped structure, i.e., the cross-sectional shape of the first through hole 311 is substantially a curve, but not limited thereto.

Further, as shown in fig. 5, based on the above design of the valve port, in the present embodiment, the inner diameter of the second through hole 321 facing the orifice of the valve needle 200 may be larger than the inner diameter of the orifice facing away from the valve needle 200. On the basis, the wall of the second through hole 321 may have a smooth transition between the two openings.

Further, as shown in fig. 5, based on the above design of the second through hole 321, in the present embodiment, the inner wall of the second through hole 321 may be substantially inclined, that is, the cross-sectional shape of the second through hole 321 is substantially diagonal. In some embodiments, the inner wall of the second through hole 321 may also have other smooth transition structures, such as a substantially arc-shaped structure, i.e., the cross-sectional shape of the second through hole 321 is substantially a curve, but not limited thereto.

Alternatively, as shown in fig. 1, 4 and 5, in the present embodiment, the thickness of the first spool 310 may be greater than the thickness of the second spool 320 in the axial direction X of the valve seat 100. In some embodiments, the thickness of the first valve core 310 may also be equal to or slightly less than the thickness of the second valve core 320, and may be flexibly adjusted according to the sealing requirement and the flow rate regulation requirement, which is not limited thereto.

Alternatively, as shown in fig. 5, in the present embodiment, the first spool 310 may be formed with a first annular groove 312, the first annular groove 312 being formed at a periphery of the orifice of the first through hole 311 on a side facing away from the valve needle 200.

Alternatively, as shown in fig. 5, in the present embodiment, the second spool 320 may be formed with a second annular groove 322, the second annular groove 322 being formed at the periphery of the one-side orifice of the second through hole 321 facing the valve needle 200.

Alternatively, in the present embodiment, the material of the first valve element 310 may be PTFE. In some embodiments, the material of the first valve element 310 may also be other non-metallic materials, such as PPS, PEAK, or nylon, but not limited thereto.

Alternatively, in the present embodiment, the material of the second valve core 320 may be stainless steel or aluminum.

Optionally, as shown in fig. 1 to 4, in this embodiment, the electrically operated valve provided by the present invention may further include a valve core sleeve 400. Specifically, the cartridge sleeve 400 is partially disposed in the valve cavity 110, and the cartridge sleeve 400 is disposed adjacent to a side of the first cartridge 310 facing away from the valve needle 200. The valve core sleeve 400 is provided with a channel penetrating through two ends thereof along the axial direction X, and the channel is communicated with the valve port formed by the first through hole 311 and the second through hole 321, and specifically communicated with the side orifice of the first through hole 311 facing away from the valve needle 200.

As shown in fig. 2, in the present embodiment, the valve seat 100 is provided with a flow hole 120.

As shown in fig. 2, in the present embodiment, the electrically operated valve further includes a mounting base 510 and a sleeve 520, the mounting base 510 is provided with a mounting cavity, and the valve seat 100, the first valve element 310, the second valve element 320 and the valve element sleeve 400 are mounted in the mounting cavity and detachably connected to the mounting cavity.

As shown in fig. 2, in the present embodiment, the driving mechanism includes a rotor assembly 610 disposed in the sleeve 520 and a nut assembly 620, the rotor assembly 610 is sleeved outside the nut assembly 620, one end of the screw 630 away from the valve needle 200 is fixedly connected to the rotor assembly 610, and the rotor assembly 610 drives the valve needle 200 to move axially X through the screw 630, so as to adjust the opening degree of the valve port. The nut assembly 620 is internally provided with internal threads to be threadedly coupled with the valve needle 200, and the nut assembly 620 is fixedly coupled with the valve seat 100.

As shown in fig. 2, in the present embodiment, the electrically operated valve further includes a screw 630, a spring housing 640, a spring 650, and a rotation member 660 (e.g., a bearing), wherein one end of the spring housing 640 is fitted over the end of the valve needle 200, the spring 650 is installed in the spring housing 640, and the spring housing 640 has a balance hole 641. The screw 630 is arranged at the other end of the spring sleeve 640; the bearing is sleeved on the screw 630, and the bearing is positioned between the screw 630 and the spring sleeve 640. Because a bearing is arranged between the screw 630 and the spring sleeve 640, and the first valve core 310 and the valve seat 100 are in soft seal, the friction force between the first valve core 310 and the screw 630 is smaller than the friction force between the valve core and the valve seat 100, and the abrasion problem of a soft seal valve port is avoided.

As shown in fig. 2, in the present embodiment, a balance channel 210 is provided in the valve needle 200 to balance the pressure at both ends of the valve needle 200, and the balance channel 210 includes a first section near the spring sleeve 640 and a second section near the valve port, and the inner diameter of the second section is larger than that of the first section, so as to be used for closing the valve with large flow.

It is noted herein that the electrically operated valves illustrated in the accompanying drawings and described in the present specification are but a few examples of the many types of electrically operated valves that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any of the details or any components of the electrically operated valve shown in the drawings or described in the present specification.

To sum up, the utility model provides an electric valve adopts the design that first case and second case combined to form the valve port, chooses non-metallic material for use through first case for when first case contacts with the needle, can realize the soft contact of needle and first case, thereby guarantees good sealed effect between needle and the valve port. On this basis, select for use metal material through the second case, utilize the characteristics that metal material is difficult to receive environmental factor influences such as temperature for the demand of flow control can be satisfied to the second case, further promotes electric valve's regulation precision.

Exemplary embodiments of the electrically operated valve proposed by the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

While the proposed electrically operated valve has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. An electrically operated valve, comprising:

a valve seat having a valve cavity;

a valve needle movably arranged in the valve cavity;

the first valve core is arranged in the valve cavity and provided with a first through hole, the first through hole is made of a non-metal material, and the first valve core is positioned between the valve needle and an opening of the valve cavity; and

the second valve core is arranged in the valve cavity and provided with a second through hole, the second valve core is made of metal materials, the second valve core is arranged on one side, facing the valve needle, of the first valve core in an adjacent mode, and the second through hole and the first through hole form a valve port together;

when the electric valve is in a fully closed state, the valve needle penetrates through the second through hole and contacts with the hole wall of the first through hole to form sealing.

2. The electrically operated valve of claim 1 wherein the port of the valve port facing the valve needle has a larger inner diameter than the port facing away from the valve needle and the inner wall of the valve port transitions smoothly between the two ports.

3. The electrically operated valve of claim 2 wherein the inner diameter of the first through bore facing the orifice of the valve needle is less than or equal to the inner diameter of the second through bore facing away from the orifice of the valve needle.

4. The electrically operated valve of claim 2 wherein the first through bore has a larger inner diameter toward the orifice of the valve needle than an inner diameter away from the orifice of the valve needle and the bore wall of the first through bore transitions smoothly between the two orifices; and/or the inner diameter of the second through hole facing to the orifice of the valve needle is larger than the inner diameter of the orifice facing away from the valve needle, and the hole wall of the second through hole smoothly transitions between the two orifices.

5. The electric valve as claimed in claim 2, wherein the inner wall of the second through hole is formed in a slant surface shape or an arc surface shape.

6. The electrically operated valve as claimed in claim 5, wherein the inner wall of the second through hole includes a plurality of inclined surfaces having different slopes or a plurality of arc surfaces having different radians.

7. The electrically operated valve as claimed in claim 1, wherein said first spool is formed with a first annular groove at a periphery of an orifice of a side of said first through hole facing away from said valve needle.

8. The electrically operated valve according to claim 1, wherein the second spool is formed with a second annular groove at a periphery of a side orifice of the second through hole which faces the valve needle.

9. The electrically operated valve as set forth in claim 1 further including:

and the valve core sleeve is partially arranged in the valve cavity and is adjacently arranged on one side of the first valve core, which is back to the valve needle, and the valve core sleeve is provided with a through channel which is communicated with the valve port.

10. The electrically operated valve according to claim 9, further comprising a mounting base having a mounting cavity, wherein said valve seat, said first spool, said second spool and said spool sleeve are mounted within said mounting cavity and removably connected thereto.

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