CN216200565U

CN216200565U - Electronic expansion valve

Info

Publication number: CN216200565U
Application number: CN202122404603.6U
Authority: CN
Inventors: 詹少军; 陈勇好; 贺宇辰
Original assignee: SUZHOU HUAYUE METAL CO Ltd
Current assignee: SUZHOU HUAYUE METAL CO Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-05
Anticipated expiration: 2031-09-30

Abstract

The utility model provides an electronic expansion valve, which comprises: the valve seat is provided with a first hole section, a second hole section and a valve cavity which are sequentially connected along an axis, a valve port is arranged on the valve seat and connected with one end, far away from the second hole section, of the valve cavity, and the diameter of the second hole section is smaller than that of the first hole section; the guide sleeve is fixedly arranged on the valve seat, the guide sleeve is provided with a connecting section and a guide section which are connected with each other along the axis, the connecting section is arranged corresponding to the first hole section and the second hole section, the guide section is positioned in the valve cavity, and a welding ring groove is annularly arranged on the outer side wall of the connecting section, wherein the diameter of the first hole section is D1, the diameter of the connecting section is D3, and 0.1mm is larger than or equal to D1-D3 and is larger than or equal to 0.02 mm. Through the technical scheme of this application, can solve the not high problem of welding reliability among the prior art.

Description

Electronic expansion valve

Technical Field

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

Background

At present, an existing electronic expansion valve includes a housing, a valve seat and a guide sleeve, the housing is connected to the valve seat, the valve seat is provided with a valve cavity, and the guide sleeve is disposed in the valve cavity and is fixedly connected to the valve seat. In prior art, for the convenience of the welding of uide bushing and disk seat, can set up the welding annular groove on the lateral wall of uide bushing usually, nevertheless in current scheme, be interference fit usually between uide bushing and the disk seat, weld the ring like this and be difficult for remaining between uide bushing and the disk seat, and then can reduce the welding quality of uide bushing and disk seat, influence the reliability that the device is connected.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve, which aims to solve the problem of low welding reliability in the prior art.

The utility model provides an electronic expansion valve, which comprises: the valve seat is provided with a first hole section, a second hole section and a valve cavity which are sequentially connected along an axis, a valve port is arranged on the valve seat and connected with one end, far away from the second hole section, of the valve cavity, and the diameter of the second hole section is smaller than that of the first hole section; the guide sleeve is fixedly arranged on the valve seat, the guide sleeve is provided with a connecting section and a guide section which are connected with each other along the axis, the connecting section is arranged corresponding to the first hole section and the second hole section, the guide section is positioned in the valve cavity, and a welding ring groove is annularly arranged on the outer side wall of the connecting section, wherein the diameter of the first hole section is D1, the diameter of the connecting section is D3, and 0.1mm is larger than or equal to D1-D3 and is larger than or equal to 0.02 mm.

Through the structure, set up the diameter of first hole section into being greater than the diameter of linkage segment, make and have the clearance between first hole section and the linkage segment, and set up the clearance of the two between 0.02mm to 0.1mm, can make and form the welding seam between linkage segment and the first hole section through this clearance, and then can be when the welding, the welding ring melting entering welding seam of being convenient for in the welding ring inslot, so can improve uide bushing and disk seat welded reliability, thereby make behind uide bushing and the disk seat welding the cooperation inseparabler, firm.

Further, the connecting section is in interference fit with the second hole section. So set up and to utilize the second hole section to restrict the position of linkage segment on the disk seat, the disk seat is convenient for when the installation fixes a position the uide bushing to the stability of post-assembly device has been improved.

Further, the diameter of the second hole section is D2, wherein, 0.05mm is more than or equal to D3-D2 is more than or equal to 0 mm. The distance between the guide sleeve and the valve seat is set between 0mm and 0.05mm, so that the positioning effect of the valve seat on the guide sleeve can be further improved, meanwhile, the guide sleeve 20 can be conveniently placed in the second hole section 12 during installation, and the stability of the device after assembly is improved through the limitation of the range.

Further, the diameter of the second hole section is D2, wherein D1-D2 is more than or equal to 0.02 mm. The diameter of the first hole section is set to be larger than that of the second hole section, so that the first hole section and the second hole section are arranged in a ladder shape, the guide of the valve seat to the guide sleeve in the installation process is facilitated, the guide sleeve is convenient to install, and the assembly efficiency is improved.

Furthermore, the connecting section is provided with a first section and a second section, the welding ring groove is positioned between the first section and the second section, the second section is positioned in the second hole section, the height of the second section is L1, the height of the second hole section is L2, the distance between one end of the first section close to the valve port and one end of the connecting section close to the valve port is L3, and L3 is more than L2 and more than L1. Through the arrangement, a non-closed welding seam structure can be constructed to facilitate filling of the welding ring, and the welding ring is located among the first hole section, the second hole section, the first section and the second section by utilizing the structure, so that the welding quality of the valve seat and the guide sleeve can be improved.

Further, L1 is more than or equal to 1 mm. So can make the uide bushing stable fixation in the valve body, and can guarantee the effective connection of uide bushing and valve body to be favorable to further improving the welding quality of disk seat and uide bushing.

Further, the height of the first section is L4, wherein L4 is more than or equal to 0.5 mm. Through the arrangement, the effective welding length of the valve body and the guide sleeve can be ensured, so that the quality of the welded valve body and the guide sleeve is further improved, and the structural strength of the welded device is also improved.

Further, the electronic expansion valve further includes: the shell is connected with the valve seat, and an accommodating cavity is formed between the shell and the valve seat; the nut sleeve is arranged in the accommodating cavity; the screw rod is movably arranged in the accommodating cavity, penetrates through the nut sleeve and is in threaded connection with the nut sleeve; the valve head assembly is movably arranged in the guide sleeve and is connected with the screw rod in a driving mode, and the screw rod is used for driving the valve head assembly to open or block the valve port. The valve head assembly moves between the opening position and the closing position, so that the accommodating cavity can be communicated with the valve cavity, and the stability of the device in operation is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a cross-sectional view of a valve seat and guide sleeve provided by the present invention after assembly;

FIG. 2 shows a cross-sectional view of a guide sleeve provided by the present invention;

FIG. 3 shows a cross-sectional view of a valve seat provided by the present invention;

FIG. 4 illustrates a cross-sectional view of an electronic expansion valve provided by the present invention;

fig. 5 shows a dimensional schematic diagram of a valve seat and a guide sleeve provided by the utility model.

Wherein the figures include the following reference numerals:

10. a valve seat; 11. a first bore section; 12. a second bore section; 13. a valve cavity; 14. a valve port;

20. a guide sleeve; 21. a connecting section; 211. a first stage; 212. a second stage; 22. a guide section; 23. welding a ring groove;

30. a housing; 31. an accommodating chamber; 40. a nut sleeve; 50. a screw; 60. a valve head assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, the present invention provides an electronic expansion valve, including: a valve seat 10 and a guide sleeve 20. The valve seat 10 is provided with a first hole section 11, a second hole section 12 and a valve cavity 13 which are sequentially connected along an axis, a valve port 14 is arranged on the valve seat 10, the valve port 14 is connected with one end, far away from the second hole section 12, of the valve cavity 13, the diameter of the second hole section 12 is smaller than that of the first hole section 11, a guide sleeve 20 is fixedly arranged on the valve seat 10, the guide sleeve 20 is provided with a connecting section 21 and a guide section 22 which are connected with each other along the axis, the connecting section 21 is arranged corresponding to the first hole section 11 and the second hole section 12, the guide section 22 is positioned in the valve cavity 13, a welding ring groove 23 is annularly arranged on the outer side wall of the connecting section 21, the diameter of the first hole section 11 is D1, the diameter of the connecting section 21 is D3, and 0.1mm is larger than or equal to D1-D3 which is larger than or equal to 0.02 mm.

When D1-D3 is less than or equal to 0.02, the gap between the first hole section 11 and the connecting section 21 is reduced, so that the area of the welding ring entering the gap is reduced, and the welding quality is further reduced; when D1-D3 is more than or equal to 0.1mm, the clearance between the first hole section 11 and the connecting section 21 is increased, so that the assembly and the welding of the guide sleeve 20 and the valve seat 10 are not facilitated, and a welding ring is required to be added for ensuring the welding quality, thereby increasing the production cost. Therefore, in the present application, setting the value of D1-D3 between 0.02mm and 0.1mm can ensure the welding quality. In particular, the values of D1-D3 may be 0.02mm, 0.05mm, or 0.1 mm.

Through the structure, set up the diameter of first hole section 11 into being greater than the diameter of linkage segment 21, make first hole section 11 and linkage segment 21 between have the clearance, and set up the clearance of the two between 0.02mm to 0.1mm, can make between linkage segment 21 and the first hole section 11 through this clearance and form the welding seam, and then can be when the welding, the welding ring melting that is convenient for in the welding ring groove 23 gets into the welding seam, so can improve uide bushing 20 and valve seat 10 welded reliability, thereby make uide bushing 20 inseparabler with the cooperation after the valve seat 10 welds, it is firm.

Further, the connecting section 21 and the second hole section 12 are in interference fit. The arrangement can limit the position of the connecting section 21 on the valve seat 10 by using the second hole section 12, so that the guide sleeve 20 is convenient to position when being installed, and the stability of the device after being assembled is improved.

Specifically, the diameter of the second hole section 12 is D2, wherein 0.05mm ≧ D3-D2 ≧ 0 mm. The distance between the two is set between 0mm and 0.05mm, so that the positioning effect of the valve seat 10 on the guide sleeve 20 can be further improved, meanwhile, the guide sleeve 20 can be conveniently placed in the second hole section 12 during installation, and the stability of the device assembly is improved through the limitation of the range. Wherein, the value of D3-D2 can be 0mm, 0.02mm or 0.05 mm.

Further, the diameter of the second hole section 12 is D2, wherein D1-D2 is more than or equal to 0.02 mm. The diameter of the first hole section 11 is set to be larger than that of the second hole section 12, so that the first hole section 11 and the second hole section 12 are arranged in a step shape, the guide of the valve seat 10 to the guide sleeve 20 in the installation process is facilitated, the guide sleeve 20 is convenient to install, and the assembly efficiency is improved. In particular, the values of D1-D2 may be 0.02mm, 0.04mm, or 0.06 mm.

Further, the connecting section 21 has a first section 211 and a second section 212, the welding ring groove 23 is located between the first section 211 and the second section 212, the second section 212 is located in the second hole section 12, the height of the second section 212 is L1, the height of the second hole section 12 is L2, the distance between one end of the first section 211 close to the valve port 14 and one end of the connecting section 21 close to the valve port 14 is L3, and L3 > L2 > L1. Through the arrangement, a non-closed welding seam structure can be constructed, the welding ring is convenient to fill, and the welding ring is positioned among the first hole section 11, the second hole section 12, the first section 211 and the second section 212 by utilizing the structure, so that the welding quality of the valve seat 10 and the guide sleeve 20 can be improved.

Specifically, L1 is more than or equal to 1 mm. So can make the uide bushing stable fixation in the valve body, and can guarantee the effective connection of uide bushing and valve body to be favorable to further improving the welding quality of disk seat 10 and uide bushing 20. Wherein the value of L1 may be 1mm, 2mm or 3 mm.

As shown in FIG. 5, the height of the first section 211 is L4, wherein L4 is 0.5mm or more. Through the arrangement, the effective welding length of the valve body and the guide sleeve 20 can be ensured, so that the quality of the welded valve body and the guide sleeve 20 is further improved, and the structural strength of the welded device is also improved. Specifically, the value of L4 may be 0.5mm, 0.8mm, or 0.9 mm.

As shown in fig. 4, the electronic expansion valve further includes: a shell 30, a nut sleeve 40 and a threaded rod 50. Wherein, the outer casing 30 is connected with the valve seat 10, and an accommodating cavity 31 is arranged between the outer casing 30 and the valve seat 10; the nut sleeve 40 is arranged in the accommodating cavity 31; the screw rod 50 is movably arranged in the accommodating cavity 31, and the screw rod 50 penetrates through the nut sleeve 40 and is in threaded connection with the nut sleeve 40; and the valve head assembly 60 is movably arranged in the guide sleeve 20, the valve head assembly 60 is in driving connection with the screw rod 50, and the screw rod 50 is used for driving the valve head assembly 60 to open or close the valve port 14. By moving the valve head assembly 60 between the open and closed positions, the receiving chamber 31 can be placed in communication with the valve chamber 13, ensuring stability of the device in operation.

Through the technical scheme that this application provided, set up the diameter of first hole section 11 into the diameter that is greater than linkage segment 21, make first hole section 11 and linkage segment 21 between have the clearance, and set up the clearance of the two between 0.02mm to 0.1mm, can make between linkage segment 21 and the first hole section 11 through this clearance and form the welding seam, and then can be when the welding, the welding ring melting entering welding seam in the welding ring groove 23 of being convenient for, so can improve uide bushing 20 and disk seat 10 welded reliability, thereby make uide bushing 20 and disk seat 10 weld the back cooperation inseparabler, and is firm, move between opening and closing the position through valve head subassembly 60 simultaneously, can make and hold chamber 31 and valve chamber 13 intercommunication, the stability when having guaranteed the device operation.

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.

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 unless specifically stated otherwise. 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 is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, 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 simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered 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 the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

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:

the valve seat (10) is provided with a first hole section (11), a second hole section (12) and a valve cavity (13) which are sequentially connected along an axis, a valve port (14) is arranged on the valve seat (10), the valve port (14) is connected with one end, far away from the second hole section (12), of the valve cavity (13), and the diameter of the second hole section (12) is smaller than that of the first hole section (11);

the guide sleeve (20) is fixedly arranged on the valve seat (10), the guide sleeve (20) is provided with a connecting section (21) and a guide section (22) which are connected with each other along the axis, the connecting section (21) is arranged corresponding to the first hole section (11) and the second hole section (12), the guide section (22) is positioned in the valve cavity (13), the outer side wall of the connecting section (21) is annularly provided with a welding ring groove (23),

the diameter of the first hole section (11) is D1, the diameter of the connecting section (21) is D3, and the diameter is more than or equal to 0.1mm and more than or equal to D1-D3 and more than or equal to 0.02 mm.

2. An electronic expansion valve according to claim 1, wherein the connection section (21) is an interference fit with the second bore section (12).

3. An electronic expansion valve according to claim 2, wherein the diameter of the second bore section (12) is D2, wherein 0.05mm ≧ D3-D2 ≧ 0 mm.

4. An electronic expansion valve according to claim 1, wherein the diameter of the second bore section (12) is D2, wherein D1-D2 ≧ 0.02 mm.

5. An electronic expansion valve according to claim 1, wherein the connection section (21) has a first section (211) and a second section (212), the weld ring groove (23) being located at the end of the connection section

The second section (212) is positioned in the second hole section (12) between the first section (211) and the second section (212), the height of the second section (212) is L1, the height of the second hole section (12) is L2, the distance between one end of the first section (211) close to the valve port (14) and one end of the connecting section (21) close to the valve port (14) is L3, and L3 is more than L2 and more than L1.

6. An electronic expansion valve according to claim 5, wherein L1 is ≧ 1 mm.

7. An electronic expansion valve according to claim 5, wherein the height of the first section (211) is L4, wherein L4 ≧ 0.5 mm.

8. The electronic expansion valve of claim 1, further comprising:

a housing (30) connected to the valve seat (10), the housing (30) and the valve seat (10) having a receiving chamber (31) therebetween;

a nut sleeve (40) arranged in the accommodating cavity (31);

the screw rod (50) is movably arranged in the accommodating cavity (31), and the screw rod (50) penetrates through the nut sleeve (40) and is in threaded connection with the nut sleeve (40);

the valve head assembly (60) is movably arranged in the guide sleeve (20), the valve head assembly (60) is in driving connection with the screw rod (50), and the screw rod (50) is used for driving the valve head assembly (60) to open or close the valve port (14).