CN210050363U

CN210050363U - Electric valve

Info

Publication number: CN210050363U
Application number: CN201920613033.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Refrigeration Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2019-03-30
Filing date: 2019-04-30
Publication date: 2020-02-11
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses an electrically operated valve, including valve body part, valve seat part and case part, the valve seat part includes the valve port portion, the case part includes sealing and flow control portion, the sealing can with the upper end butt or the separation of valve port portion, valve port portion includes the through-hole, the through-hole includes the constant diameter section that the aperture equals, defines the aperture of constant diameter section is D ₁The flow regulating part comprises a matching section, when the sealing part is abutted against the upper end part, the outer wall of the matching section is matched with the hole wall of the equal-diameter section, and the outer wall of the matching section is matched with the hole wall of the equal-diameter sectionThe wall is substantially circular in cross-section and the outer wall of the mating section has a diameter D ₂D is more than or equal to 0.8mm ₁≤3.2mm，0.4mm≤D ₁‑D ₂Less than or equal to 0.7mm, the utility model discloses an electrically operated valve can improve electrically operated valve's performance.

Description

Electric valve

Technical Field

The utility model relates to a fluid control technical field especially relates to an electrically operated valve.

Background

In the technical field of refrigeration, an electric valve is a refrigerant flow control component, and the electric valve comprises a valve needle and a valve port part, wherein the valve needle can axially move relative to the valve port part so as to adjust the flow of refrigerant. Fig. 5 is a schematic partial configuration diagram of a seat member of a conventional electric valve, and fig. 6 is a schematic partial configuration diagram of the electric valve when the electric valve is closed. The electric valve comprises a valve body 01, a valve seat 02 and a valve needle 03, wherein the valve seat 02 comprises a valve port part 021, and the valve needle 03 comprises a first section 031 and a second section 032. During the axial movement of the needle 03 relative to the valve port 021, the second segment 032 can abut against the seal position 022 of the valve port 021 to close the electric valve. How to optimize the gap between the outer wall of the first segment 031 and the inner wall of the valve port 021 to improve the performance of the electric valve is a technical problem that those skilled in the art have tried to solve.

SUMMERY OF THE UTILITY MODEL

The purpose of the present application is to provide an electric valve, which can improve the performance of the electric valve.

The application provides a pair of motorised valve, including valve body part, valve seat part and case part, the valve seat part includes valve port portion, its characterized in that, the case part includes sealing portion and flow control portion, sealing portion can with the upper end butt or the separation of valve port portion, valve port portion includes the through-hole, the through-hole includes the constant diameter section that the aperture equals, defines the aperture of constant diameter section is D ₁The flow regulating part comprises a matching section, when the sealing part is abutted to the upper end part, the outer wall of the matching section is matched with the hole wall of the equal-diameter section, the cross section of the outer wall of the matching section is approximately circular, and the diameter of the outer wall of the matching section is D ₂D is more than or equal to 0.8mm ₁≤3.2mm，0.4mm≤D ₁-D ₂≤0.7mm。

The electric valve of the proposal has the equal-diameter section with the aperture of D ₁The diameter of the outer wall of the mating section is D ₂，0.8mm≤D ₁≤3.2mm，0.4mm≤D ₁-D ₂Less than or equal to 0.7mm, and can improve the performance of the electric valve.

Drawings

Fig. 1 is a schematic structural diagram of an electric valve according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

FIG. 3 is a graph showing the relationship between the difference between the diameter of the inner wall of the valve port and the diameter of the outer wall of the flow rate adjusting portion and the operational reliability of the electric valve;

FIG. 4 is a graph showing the difference between the diameter of the inner wall of the valve port and the diameter of the outer wall of the flow regulating portion in relation to the flow rate curve;

fig. 5 is a partial schematic structural view of a valve seat member of an electric valve according to the background art;

fig. 6 is a partial schematic view of the electric valve when the electric valve is closed.

Detailed Description

It should be noted that, if the lateral terms such as "upper" and "lower" are used herein, they are defined with reference to the position shown in the drawings of the present specification, and it should be understood that the lateral terms are used only for the clarity and the side effects of the technical side plan, and should not limit the scope of protection.

In order to make those skilled in the art better understand the technical solutions of the present application, the following description is made with reference to the accompanying drawings and specific embodiments.

The electric valve shown in fig. 1 includes a valve body member 10, a valve seat member 20, a valve core member 30, a rotor member 40 disposed in the valve body member 10, and a nut assembly 50, wherein the nut assembly 50 is fixedly connected to the valve body member 10, the rotor member 40 includes a rotor 41 and a screw 42, the nut assembly 50 includes a nut 51, and the screw 42 and the nut 51 are threadedly connected. The valve seat member 20 includes a valve port portion 201, and the valve core member 30 includes a seal portion 301 and a flow rate adjustment portion 302. The flow rate adjusting portion 302 is provided below the sealing portion 301, and the lower end surface of the sealing portion 301 can be brought into contact with or separated from the upper end portion 210 of the valve port portion 201 to close or open the electric valve. When the sealing part 301 is separated from the valve port part 201, the flow rate adjusting partThe outer wall of 302 is capable of mating with the inner wall of valve port 201. As shown in fig. 1 and 2, the valve port 201 includes a through-hole 2011, the through-hole 2011 includes an equal-diameter section 2011A with an equal diameter, when the sealing portion 301 abuts against the upper end 210 of the valve port 201, the flow rate adjusting portion 302 includes a fitting section 302A located in the equal-diameter section 2011A, that is, an outer wall of the fitting section 302A is fitted with a hole wall of the equal-diameter section 2011A to form a fluid flow channel, and when the sealing portion 301 does not abut against the upper end 210 of the valve port 201, fluid can flow between the outer wall of the fitting section 302A and the hole wall of the equal-diameter section 2011A. The outer wall of mating segment 302A is generally circular in cross-section and defines an isometric segment 2011A with a bore diameter D ₁The diameter of the outer wall of the mating segment 302A is D ₂D is more than or equal to 0.8mm ₁≤3.2mm，0.4mm≤D ₁-D ₂≤0.7mm。

The electric valve of the scheme has the value D being more than or equal to 0.8mm as shown in figures 3 and 4 ₁Within the range of less than or equal to 3.2mm, along with the increase of the times of the opening and closing actions of the electric valve, if the cross section of the valve opening part 201 is D ₁-D ₂<0.4mm, the flow curve of the electric valve is relatively stable (as shown by curve X in FIG. 4) ₃' shown), but its motion reliability is significantly reduced (as shown by curve X in fig. 3) ₃Shown) and if the cross-section of the valve mouth 201, D ₁-D ₂>0.7mm, the operation reliability of the electric valve is good (as shown by curve X in FIG. 3) ₁Shown), but there is a sharp discontinuity M in the flow curve of the motorized valve (e.g., curve X in fig. 4) ₁' shown), the flow smoothness of the electric valve is not good. In this embodiment, the aperture (inner diameter of the aperture wall) dimension D of the equal-diameter section 2011A of the valve port 201 is measured ₁And the diameter D of the outer wall of the mating section 302A of the flow regulating portion 302 ₂The design of the size of (2) can improve the performance (action reliability and flow stability) of the electric valve (as shown by the curve X in figure 3) as shown in the effects of figures 3 and 4 ₂And curve X in FIG. 4 ₂' shown), the technical problems that the electric valve has high action reliability and poor flow stability, or the electric valve has good flow stability and poor action reliability are solved, and the action reliability and the flow stability of the electric valve are considered. Note that D in this document ₂Any cross section of finger fitting section 302AWhen the cross-sections are different, the values of the outer diameters of (a) and (b) may be different.

It should be noted that, as will be understood by those skilled in the art, the equal diameter sections described herein are not limited to being absolutely equal, and the aperture of the equal diameter sections allows for machining tolerance, so that the resulting dimensional deviation should be within the scope of the present application as long as the technical problem to be solved by the present solution is not affected.

Specifically, as shown in fig. 1 and 2, the valve core component 30 includes a valve core 31 and a sealing member 32, and the sealing member 32 can be sleeved on an outer peripheral portion of the valve core 31 from a lower end of the valve core 31, so that the installation is convenient. The valve body 31 includes a flow rate adjusting portion 302, and the seal 32 includes a sealing portion 301. The sealing member 32 is made of a soft material, and when the valve element 31 abuts against the sealing member 32, the sealing member 32 can be deformed by a proper amount of force, and for example, the sealing member can be made of a rubber material, so that the sealing reliability is improved. The valve core 31 includes a packing mounting part 303 disposed on an upper side of the flow rate adjusting part 302, and an outer diameter of the packing mounting part 303 is smaller than a diameter of an upper end of the fitting section 302A, so that the fitting section 302A and the packing mounting part 303 form a stepped part 304 to restrict the packing 32 from being separated from the valve core 31.

The valve seat member 20 includes a valve seat 21, the valve seat 21 is at least partially disposed in the valve body member 10, the valve seat 21 is substantially cylindrical, an upper end of the valve seat 21 extends into a lower portion of the nut 51, the valve seat 21 includes the valve opening portion 201, and the valve core member 30 is disposed in a valve seat cavity 211 of the valve seat 21 or partially located in the valve seat cavity 211 of the valve seat 21. The screw 42 is movably connected to the valve body 31, and the movable connection means that the screw 42 and the valve body 31 can move relatively in the axial direction in a certain state of the electric valve, but the screw 42 can also drive the valve body 31 to move in the axial direction in another state of the electric valve. The valve body 31 includes a guide portion 305 provided on the upper side of the seal mounting portion 303, a compression spring 33 is provided in the guide portion 305, and the compression spring 33 is located on the lower side of the screw 42. The screw 42 can axially slide the valve element 31 relative to the inner wall of the valve seat 21. The outer wall of the guide portion 305 is in clearance sliding fit with the inner wall of the valve seat 21. The inner wall of the valve seat 21 provides a guide for the valve body 31, and the operational reliability of the valve body 31 is improved.

As shown in fig. 2, the valve port 201 includes a convex ring portion 202 protruding upward in the axial direction, the equal-diameter section 2011A is located at least partially on the convex ring portion 202, and the convex ring portion 202 includes an upper end 210. The lower end surface of the sealing portion 301 and the upper end surface of the upper end portion 210 can be brought into contact with or separated from each other to control opening and closing of the motor-operated valve. As a further alternative, the outer diameter of the upper end portion 210 of the convex ring portion 202 is smaller than the outer diameter of the sealing portion 301, and the inner diameter of the convex ring portion 202 is smaller than the inner diameter of the sealing portion 301, so as to further increase the sealing reliability when the seal 32 abuts against the convex ring portion 202. An arc-shaped transition portion 2021 is arranged between the upper end face of the upper end portion 210 and the equal-diameter section 2011A, the transition portion 2021 is approximately in a horn shape with a large opening at the upper part and a small opening at the lower part, and the profile of the longitudinal section of the transition portion 2021 is in a horn shape, so that abrasion or scratch of the sealing member 32 when the sealing member is abutted to the valve port portion 201 is improved.

As shown in fig. 2, the through-hole 2011 includes a tapered hole 2011B located on the lower side of the equal-diameter section 2011A, and the tapered hole 2011B is arranged in a manner that the diameter of the hole is smaller at the upper part and larger at the lower part. The aperture of the upper end of the tapered bore 2011B is equal to the aperture of the equal-diameter section 2011A, the central longitudinal section (the longitudinal section in the central axial direction of the valve core 31) of the fitting section 302A of the valve core 31 is substantially tapered with a large top and a small bottom, the profile of the fitting section 302A is arc-shaped, and the diameter of the fitting section 302A is gradually reduced from top to bottom.

The electrically operated valve provided in the present application is described above by way of example. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. The utility model provides an electrically operated valve, includes valve body part, valve seat part and case part, the valve seat part includes the valve port portion, its characterized in that, the case part includes sealing portion and flow control portion, sealing portion can with the upper end butt of valve port portion or separation, the valve port portion includes the through-hole, the through-hole includes the equal footpath section that the aperture equals, defines the hole of equal footpath sectionDiameter of D ₁The flow regulating part comprises a matching section, when the sealing part is abutted to the upper end part, the outer wall of the matching section is matched with the hole wall of the equal-diameter section, the cross section of the outer wall of the matching section is approximately circular, and the diameter of the outer wall of the matching section is D ₂D is more than or equal to 0.8mm ₁≤3.2mm，0.4mm≤D1-D2≤0.7mm。

2. The electrically operated valve according to claim 1, wherein the valve port portion comprises a convex ring portion including the upper end portion, the constant diameter section is provided at least partially in the convex ring portion, and a lower end surface of the sealing portion is capable of abutting against an upper end surface of the upper end portion to close the electrically operated valve.

3. The electrically operated valve according to claim 1, wherein the spool member includes a spool including the flow regulating portion and a seal member made of a soft material, the seal member being provided at an outer peripheral portion of the spool, the seal member including the seal portion.

4. The electric valve of claim 1, wherein the diameter of the upper end of the mating section is larger than the diameter of the lower end of the mating section.

5. The electric valve according to claim 4, wherein the valve core comprises a seal mounting part arranged on the upper side of the fitting section, the outer diameter of the seal mounting part is smaller than the diameter of the upper end of the fitting section, the fitting section and the seal mounting part form a step part, and the step part limits the seal from being separated from the valve core.

6. The electrically operated valve according to claim 5, wherein the valve seat member includes a valve seat including the valve port portion, the spool member is provided at least partially in a valve seat cavity of the valve seat, the spool includes a guide portion provided on an upper side of the seal mounting portion, and an outer wall of the guide portion is slidably fitted with an inner wall of the valve seat.

7. The electric valve according to any one of claims 1 to 6, further comprising a rotor component and a nut component disposed inside the valve body component, wherein the nut component is fixedly connected with the valve body component, the rotor component comprises a rotor and a screw, the nut component comprises a nut, the screw is in threaded connection with the nut, an upper portion of the valve seat extends into a lower portion of the nut, the screw is movably connected with the valve element, a compression spring is disposed inside the valve element and located on a lower side of the screw, the screw can drive the valve element to axially slide relative to an inner wall of the valve seat, the through hole comprises a tapered hole located on a lower side of the constant diameter section, a hole diameter of the tapered hole is configured to be large from top to bottom, and a diameter of the fitting section is configured to be gradually smaller from top to bottom.

8. The electric valve according to any one of claims 1 to 6, wherein the through hole comprises a tapered hole located at a lower side of the constant diameter section in an axial direction of the valve seat, a hole diameter of the tapered hole is set to be smaller at an upper end, a hole diameter of an upper end of the tapered hole is equal to a hole diameter of the constant diameter section, and a central longitudinal section of the fitting section has a contour that is as large as an arc.

9. The electric valve according to any of the claims 1 to 6, characterized in that a transition portion is included between the upper end portion and the constant diameter section, the transition portion is substantially in the shape of a trumpet with a large opening at the top and a small opening at the bottom, and the profile of the longitudinal section of the transition portion is in an arc shape.