CN210123017U

CN210123017U - Electronic expansion valve

Info

Publication number: CN210123017U
Application number: CN201920726490.1U
Authority: CN
Inventors: 詹少军; 冯贵刚; 何秋波
Original assignee: SUZHOU HUAYUE METAL CO Ltd
Current assignee: SUZHOU HUAYUE METAL CO Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-03-03
Anticipated expiration: 2029-05-20

Abstract

The utility model provides an electronic expansion valve, include: the valve body is provided with a valve port; the valve head part is movably arranged in the valve body and comprises a valve head and a pressing sleeve, the valve head is provided with an accommodating cavity, one end, close to the valve port, of the accommodating cavity is provided with a bottom wall, a through hole is formed in the bottom wall, and the valve head is used for plugging the valve port; the guide sleeve is arranged in the valve body, and the valve head is arranged in the guide sleeve in a penetrating way; the driving part is movably arranged in the valve body, the end part of the driving part penetrates through the pressing sleeve, the end part of the driving part and the pressing sleeve are provided with channels, and the channels, the accommodating cavity and the through hole form a balance channel penetrating through the valve head together; the elastic piece is arranged in the accommodating cavity, one end of the elastic piece is matched with the bottom wall, and the other end of the elastic piece can be compressed by the end part of the driving part; and a seal disposed between the valve head and the guide sleeve. Through the technical scheme provided by the utility model, can solve the electronic expansion valve among the prior art problem that manufacturing cost is high and the size is big.

Description

Electronic expansion valve

Technical Field

The utility model relates to the technical field of valves, particularly, relate to an electronic expansion valve.

Background

In the existing electronic expansion valve, the connection structure of the valve head and the screw is complex, so that the processing procedure is complicated and the manufacturing cost is high; and the sizes of the valve head and the screw rod are both longer, and the valve head and the screw rod cannot be thinner and thinner in order to ensure the service life and the strength of the product, so that the whole size of the conventional electronic expansion valve cannot be further compressed, and the development trend of miniaturization of the product is not met.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve to solve the electronic expansion valve among the prior art problem that manufacturing cost is high, the size is big.

In order to solve the above problem, the utility model provides an electronic expansion valve, include: the valve body is provided with a valve port; the valve head part is movably arranged in the valve body and comprises a valve head and a pressing sleeve, the valve head is provided with an accommodating cavity, one end, close to the valve port, of the accommodating cavity is provided with a bottom wall, a through hole is formed in the bottom wall, and the valve head is used for plugging the valve port; the guide sleeve is arranged in the valve body, and the valve head is arranged in the guide sleeve in a penetrating way; the driving part is movably arranged in the valve body, the end part of the driving part penetrates through the pressing sleeve, the end part of the driving part and the pressing sleeve are provided with channels, and the channels, the accommodating cavity and the through hole form a balance channel penetrating through the valve head together; the elastic piece is arranged in the accommodating cavity, one end of the elastic piece is matched with the bottom wall, and the other end of the elastic piece can be compressed by the end part of the driving part; and a seal disposed between the valve head and the guide sleeve.

Further, the driving part comprises a rod-shaped part and a valve sleeve, the rod-shaped part can move axially, the end part of the rod-shaped part is connected with the valve sleeve, the valve sleeve is matched with one end, far away from the valve port, of the valve head part, and the other end of the elastic part is abutted to the valve sleeve.

Furthermore, the valve sleeve is fixed at the end part of the rod-shaped part, the outer peripheral surface of the valve sleeve is provided with a first limiting step, and the other end of the elastic part is abutted against the first limiting step.

Further, the valve head is kept away from the one end of valve port and is had and hold the opening of chamber intercommunication, and the pressure cover sets up at the opening part, and the valve barrel with press the cover butt.

Further, the rod-shaped piece is worn to establish through pressing the cover, and the outer peripheral face that presses the cover has the spacing step of second, presses partly wearing to establish of cover to hold the chamber, and the terminal surface and the spacing step butt of second of valve head.

Furthermore, a first avoidance hole is formed between the inner wall of the valve sleeve and the rod-shaped piece, a second avoidance hole is formed between the inner wall of the pressing sleeve and the rod-shaped piece, the first avoidance hole and the second avoidance hole form a channel, and the through hole, the accommodating cavity, the first avoidance hole and the second avoidance hole are communicated in sequence.

Furthermore, the rod-shaped part comprises a first rod section and a second rod section which are connected with each other, the cross-sectional area of the second rod section is smaller than that of the first rod section, the second rod section penetrates through the pressing sleeve and the valve sleeve, a first avoidance hole is formed between the inner wall of the valve sleeve and the second rod section, and a second avoidance hole is formed between the inner wall of the pressing sleeve and the second rod section.

Further, the second pole segment is arcuate in radial cross-section.

Further, the driving part has an external thread, and the electronic expansion valve further includes: the nut component is provided with an internal thread, and the external thread is matched with the internal thread.

Further, the length of the end of the driving part penetrating into the valve head part is less than or equal to half of the length of the valve head part.

Use the technical scheme of the utility model, the valve head portion is driven to the accessible drive division and is removed to through the valve head shutoff or open the valve port, can exert the effort to the valve head portion through the elastic component, in order to improve the leakproofness when the shutoff valve port. Because the end part of the driving part is matched with the end, far away from the valve port, of the valve head part, and the elastic part is positioned between the end part of the driving part and the bottom wall of the accommodating cavity of the valve head part, the lengths of the valve head part and the driving part can be reduced, the structure is simplified, the processing procedures can be simplified, the processing difficulty is reduced, and the manufacturing cost of the electronic expansion valve is reduced. Moreover, a balance channel penetrating through the valve head is formed by a channel formed by the end part of the driving part and the cavity in the pressing sleeve, the accommodating cavity and the through hole of the valve head, so that the areas at the two ends of the valve head are kept in pressure balance, and the product size can be smaller. The valve head can be guided through the guide sleeve, the sealing performance can be improved through the sealing element, and internal leakage is avoided.

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 shows a cross-sectional view of an electronic expansion valve provided by an embodiment of the present invention;

fig. 2 shows a perspective view of the electronic expansion valve of fig. 1;

fig. 3 shows a schematic view of a part of the components in fig. 1.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a valve port; 21. a valve head; 211. a through hole; 22. pressing the sleeve; 221. a second avoidance hole; 31. a rod-like member; 311. a first pole segment; 312. a second pole segment; 32. a valve housing; 321. a first avoidance hole; 40. an elastic member; 50. a nut assembly; 60. a guide sleeve; 71. a first cavity; 72. a second cavity; 80. and a seal.

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 3, an embodiment of the present invention provides an electronic expansion valve, including: a valve body 10, the valve body 10 having a valve port 11; the valve head part is movably arranged in the valve body 10 and comprises a valve head 21 and a pressing sleeve 22, the valve head 21 is provided with an accommodating cavity, one end, close to the valve port 11, of the accommodating cavity is provided with a bottom wall, a through hole 211 is formed in the bottom wall, and the valve head 21 is used for plugging the valve port 11; the driving part is movably arranged in the valve body 10, the end part of the driving part penetrates through the pressing sleeve 22, the end part of the driving part and the pressing sleeve 22 are provided with channels, and the channels, the accommodating cavity and the through hole 211 form a balance channel penetrating through the valve head together; and the elastic piece 40 is arranged in the accommodating cavity, one end of the elastic piece 40 is matched with the bottom wall, and the other end of the elastic piece 40 can be compressed by the end part of the driving part.

By applying the technical scheme of the embodiment, the valve head part can be driven by the driving part to move so as to seal or open the valve port 11 of the valve body 10 through the valve head 21, and the elastic part 40 can apply acting force to the valve head part so as to improve the sealing property when the valve port is sealed. Because the end of the driving part is matched with the end of the valve head part far away from the valve port 11, and the elastic part 40 is positioned between the end of the driving part and the bottom wall of the accommodating cavity of the valve head part, the lengths of the valve head part and the driving part can be reduced, the structure is simplified, the processing procedures can be simplified, the processing difficulty is reduced, and the manufacturing cost of the electronic expansion valve is reduced. Moreover, a balance channel penetrating through the valve head is formed by a channel formed by the end of the driving part and the cavity in the pressing sleeve 22, the accommodating cavity of the valve head 21 and the through hole 211 of the valve head 21, so that the areas at two ends of the valve head can keep pressure balance, and the product size can be smaller. By arranging the balance channel, the fluid pressure in the areas of the two ends of the valve head part can be consistent, so that the valve head part can prevent the valve port 11 from being blocked due to the pressure difference between the two sides of the valve head part. Moreover, this facilitates opening of the valve port 11.

The electronic expansion valve further includes: and the guide sleeve 60 is arranged in the valve body 10, and the valve head is arranged in the guide sleeve 60 in a penetrating mode. The valve head 21 can be guided by the guide sleeve 60.

In this embodiment, the electronic expansion valve further includes: a seal 80, the seal 80 being disposed between the valve head and the guide sleeve 60. The sealing member 80 can improve the sealing property and prevent leakage. Specifically, the inner wall of the guide sleeve 60 has an annular groove, and an annular sealing member 80 is disposed in the annular groove, so that the outer wall of the valve head 21 can be sealed by the annular sealing member 80, thereby ensuring the sealing performance of the electronic expansion valve.

In this embodiment, the length of the end of the driving part penetrating into the valve head part is less than or equal to half of the length of the valve head part, so that the length of the driving part can be reduced, and the processing is convenient.

In this embodiment, the valve head 21 is cylindrical, and the accommodating cavity is circular hole-shaped, which makes the valve head 21 simple in structure, and is convenient for processing and assembling with related parts.

In this embodiment, the driving part includes a rod 31 and a valve sleeve 32, the rod 31 is axially movable, an end of the rod 31 is connected to the valve sleeve 32, the valve sleeve 32 is engaged with an end of the valve head part away from the valve port 11, and the other end of the elastic member 40 abuts against the valve sleeve 32. Therefore, the valve sleeve 32 can be driven to move by the movement of the rod-shaped member 31, the valve sleeve 32 can drive the valve head portion to move to close the valve port 11 when moving towards the direction close to the valve port 11, and the valve sleeve 32 can drive the valve head portion to move to open the valve port 11 when moving towards the direction far away from the valve port 11.

As shown in fig. 1, the valve housing 32 is fixed to an end of the rod member 31, the outer peripheral surface of the valve housing 32 has a first limit step, and the other end of the elastic member 40 abuts against the first limit step. The elastic member 40 can be positioned and limited by the first limiting step. Furthermore, the valve sleeve 32 prevents the rod 31 from directly contacting the elastic member 40, thereby reducing the abrasion of the rod 31. Specifically, valve sleeve 32 may be coupled to the end of rod 31 by laser welding, which facilitates machining and provides a secure connection. In the present embodiment, the elastic member 40 may be provided as a spring.

By adopting the technical scheme, the structure of the electronic expansion valve can be simplified, the axial size of the driving part can be reduced, and the overall length of the electronic expansion valve is reduced, so that the structure of the electronic expansion valve is more compact, and the miniaturization is realized.

In this embodiment, the end of the valve head 21 away from the valve port 11 has an opening communicating with the receiving cavity, the pressing sleeve 22 is disposed at the opening, and the valve sleeve 32 abuts against the pressing sleeve 22. This allows the valve sleeve 32 to be restrained by the sleeve 22 so that the valve sleeve 32 will move the valve head when it is moved away from the valve port 11 by the rod 31.

Specifically, the front end of the rod-shaped member 31 is inserted through the pressing sleeve 22, the outer peripheral surface of the pressing sleeve 22 has a second limit step, a part of the pressing sleeve 22 is inserted in the accommodating cavity, and the end surface of the valve head 21 abuts against the second limit step. Therefore, the pressing sleeve 22 and the valve head 21 can be subjected to limiting assembly through the second limiting step, and the pressing sleeve 22 and the valve head 21 can be positioned and assembled conveniently. Preferably, the pressing sleeve 22 and the valve head 21 can be connected by laser welding, so that the operation is convenient and the connection is firm. Specifically, the second limit step includes a narrow portion penetrating into the accommodation chamber and a wide portion abutting against the upper end surface of the valve head 21.

Specifically, in the present embodiment, a first avoiding hole 321 is formed between the inner wall of the valve sleeve 32 and the rod 31, a second avoiding hole 221 is formed between the inner wall of the pressing sleeve 22 and the rod 31, and the first avoiding hole 321 and the second avoiding hole 221 together form the above-mentioned channel. The through hole 211, the accommodating cavity, the first avoiding hole 321 and the second avoiding hole 221 are sequentially communicated. Thus, a balance passage may be formed by the through hole 211, the receiving cavity, the first escape hole 321, and the second escape hole 221, so that regions at both ends of the valve head portion communicate. In this manner, the holes in the valve sleeve 32 and the press sleeve 22 can be utilized for ease of machining. In the present embodiment, the valve head 21 is cylindrical, and has a stepped hole in the valve head 21, in which a hole having a larger diameter forms an accommodation chamber and a hole having a smaller diameter forms the through hole 211. In this way, the structure of the valve head 21 can be simplified, and the valve sleeve 32, the pressing sleeve 22 and the like can be conveniently machined and assembled.

In this embodiment, the rod 31 includes a first rod segment 311 and a second rod segment 312 connected to each other, and the cross-sectional area of the second rod segment 312 is smaller than that of the first rod segment 311 in the axial direction. In this embodiment, the cross section of the first rod section 311 in the axial direction is circular, a part of the second rod section 312 is cut off on the basis of the first rod section 311, the cross section in the axial direction is arcuate, the second rod section 312 is inserted into the pressing sleeve 22 and the valve sleeve 32, the first avoidance hole 321 is formed between the inner wall of the valve sleeve 32 and the second rod section 312, and the second avoidance hole 221 is formed between the inner wall of the pressing sleeve 22 and the second rod section 312. During machining, an integrally formed rod may be used as the rod 31, and a portion of the rod 31 is cut off in the axial direction to form the second rod segment 312, which is convenient for machining and low in manufacturing cost.

In other embodiments, not shown, the cross-section of the second pole segment 312 may be a sector of any area or other irregular pattern, preferably having a smaller cross-section than the first pole segment 311. Of course, the cross-sectional area of the second rod section 312 may be larger than that of the first rod section 311, and the purpose of the present solution can be achieved as long as a gap is formed between the second rod section 312 and the press sleeve 22 and the valve sleeve 32.

In this embodiment, the lower end of the second rod section 312 has a third limit step, the end surface of the third limit step is flush with the end surface of the pressure sleeve 22, and the end surface of the valve sleeve 32 abuts against the end surface of the third limit step. This facilitates the positioning and assembly of the second stem section 312, the compression sleeve 22 and the valve sleeve 32. The valve sleeve 32 is fixedly mounted on the third limiting step and moves along with the movement of the rod-shaped member 31, and when the valve sleeve 32 moves upwards to the position of the pressing sleeve 22, the valve head 21 fixed with the pressing sleeve 22 is driven to move upwards together to open the valve port 11.

Further, in the present embodiment, the radial cross-section of the second rod segment 312 is arcuate. This facilitates the manufacture of second pole segment 312, and to ensure the structural strength of second pole segment 312, the radial cross-section of second pole segment 312 may be configured as a major arc segment.

In this embodiment, the driving portion has an external thread, and the electronic expansion valve further includes: and a nut component 50, wherein the nut component 50 is provided with an internal thread, and the external thread is matched with the internal thread. In this embodiment, the electronic expansion valve further includes a magnetic rotor, the magnetic rotor can drive the driving portion to rotate, and the driving portion can move axially through the screw-thread fit between the driving portion and the nut component 50, so as to drive the valve head to move. In particular, the external thread is located on the rod 31.

As shown in fig. 3, the area between the guide sleeve 60, the rod 31, the pressing sleeve 22 and the nut assembly 50 is a first cavity 71, the portion of the valve port 11 below the valve head 21 is a second cavity 72, and the first cavity 71 and the second cavity 72 can be communicated through the through hole 211, the accommodating cavity, the first avoiding hole 321 and the second avoiding hole 221.

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.

Claims

1. An electronic expansion valve, comprising:

a valve body (10), the valve body (10) having a valve port (11);

the valve head part is movably arranged in the valve body (10), the valve head part comprises a valve head (21) and a pressing sleeve (22), the valve head (21) is provided with an accommodating cavity, one end of the accommodating cavity, close to the valve port (11), is provided with a bottom wall, a through hole (211) is formed in the bottom wall, and the valve head (21) is used for plugging the valve port (11);

the guide sleeve (60) is arranged in the valve body (10), and the valve head is arranged in the guide sleeve (60) in a penetrating mode;

the driving part is movably arranged in the valve body (10), the end part of the driving part penetrates through the pressing sleeve (22), a channel is arranged on the end part of the driving part and the pressing sleeve (22), and the channel, the accommodating cavity and the through hole (211) together form a balance channel penetrating through the valve head;

an elastic member (40) disposed in the accommodation chamber, one end of the elastic member (40) being engaged with the bottom wall, the other end of the elastic member (40) being compressible by an end of the driving portion;

a seal (80), the seal (80) disposed between the valve head and the guide sleeve (60).

2. An electronic expansion valve according to claim 1, wherein the driving part comprises a rod-shaped member (31) and a valve housing (32), the rod-shaped member (31) being axially movable, an end of the rod-shaped member (31) being connected to the valve housing (32), the valve housing (32) being fitted to an end of the valve head part remote from the valve port (11), and the other end of the elastic member (40) being in abutment with the valve housing (32).

3. An electronic expansion valve according to claim 2, wherein the valve sleeve (32) is fixed to the end of the rod-like member (31), the outer peripheral surface of the valve sleeve (32) has a first limit step, and the other end of the elastic member (40) abuts against the first limit step.

4. An electronic expansion valve according to claim 2, wherein the valve head (21) has an opening at its end remote from the valve port (11) for communicating with the receiving chamber, the pressure sleeve (22) being arranged at the opening, and the valve sleeve (32) being in abutment with the pressure sleeve (22).

5. An electronic expansion valve according to claim 4, wherein the rod-like member (31) is inserted through the pressing sleeve (22), the outer circumferential surface of the pressing sleeve (22) has a second limit step, a portion of the pressing sleeve (22) is inserted into the accommodation chamber, and the end surface of the valve head (21) abuts against the second limit step.

6. The electronic expansion valve according to claim 2, wherein a first avoiding hole (321) is provided between the inner wall of the valve sleeve (32) and the rod-shaped member (31), a second avoiding hole (221) is provided between the inner wall of the pressure sleeve (22) and the rod-shaped member (31), the first avoiding hole (321) and the second avoiding hole (221) form the channel, and the through hole (211), the accommodating cavity, the first avoiding hole (321) and the second avoiding hole (221) are sequentially communicated.

7. An electronic expansion valve according to claim 6, wherein the rod-shaped member (31) comprises a first rod section (311) and a second rod section (312) connected to each other, the cross-sectional area of the second rod section (312) is smaller than the cross-sectional area of the first rod section (311), the second rod section (312) is inserted into the pressure sleeve (22) and the valve sleeve (32), the first avoidance hole (321) is provided between the inner wall of the valve sleeve (32) and the second rod section (312), and the second avoidance hole (221) is provided between the inner wall of the pressure sleeve (22) and the second rod section (312).

8. An electronic expansion valve according to claim 7, wherein the radial cross-section of the second rod section (312) is arcuate.

9. The electronic expansion valve of claim 1, wherein the drive portion has an external thread, the electronic expansion valve further comprising:

a nut component (50), the nut component (50) having an internal thread, the external thread mating with the internal thread.

10. The electronic expansion valve according to any one of claims 1 to 9, wherein the length of penetration of the end of the driving portion into the valve head portion is less than or equal to half the length of the valve head portion.