CN216200580U

CN216200580U - Electronic expansion valve

Info

Publication number: CN216200580U
Application number: CN202122406183.5U
Authority: CN
Inventors: 詹少军; 贺宇辰; 刘曈晖
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian 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 a valve body and a nut sleeve. The valve body is provided with a mounting cavity and a valve port, the mounting cavity is communicated with the valve port, the mounting cavity comprises a first mounting section and a second mounting section which are arranged in a stepped manner, and the inner diameter of the first mounting section is larger than that of the second mounting section; the nut sleeve is provided with an annular mounting plate at the periphery, the annular mounting plate is positioned in the first mounting section, the annular mounting plate is welded with the inner wall of the first mounting section, and the annular mounting plate is in clearance fit with the side surface of the first mounting section; the electronic expansion valve further comprises a guide sleeve, wherein the guide sleeve is partially positioned in the mounting cavity, the guide sleeve is positioned at one end, close to the valve port, of the nut sleeve, one end, far away from the valve port, of the guide sleeve extends into the guide hole, the guide sleeve and the nut sleeve are coaxially arranged, and the guide sleeve and the guide hole are in interference fit. By adopting the technical scheme, the problem of poor coaxiality of the nut sleeve and the valve body is solved.

Description

Electronic expansion valve

Technical Field

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

Background

The electronic expansion valve comprises a valve body and a nut sleeve, the nut sleeve is fixed inside the valve body, a valve port is formed in the valve body, a screw is connected with the nut sleeve in a threaded mode, the end portion of the screw is connected with a valve sleeve, and the valve port is plugged or opened through the valve sleeve. In the prior art, the nut sleeve is in interference fit with the valve body, the nut sleeve is fixed on the valve body in a welding mode, and the joint of the nut sleeve and the valve body is easy to deform in the welding process, so that the coaxiality of the nut sleeve and the valve body is poor, the coaxiality of the screw rod, the valve sleeve and the valve port is poor, and the valve sleeve cannot well block the valve port.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve, which aims to solve the problem that the coaxiality of a nut sleeve and a valve body is poor in the prior art.

The utility model provides an electronic expansion valve which comprises a valve body and a nut sleeve. The valve body is provided with a mounting cavity and a valve port, the mounting cavity is communicated with the valve port, the mounting cavity comprises a first mounting section and a second mounting section which are arranged in a stepped manner, and the inner diameter of the first mounting section is larger than that of the second mounting section; the nut sleeve is provided with an annular mounting plate at the periphery, the annular mounting plate is positioned in the first mounting section, the annular mounting plate is welded with the inner wall of the first mounting section, and the annular mounting plate is in clearance fit with the side surface of the first mounting section; the electronic expansion valve further comprises a guide sleeve, wherein the guide sleeve is partially positioned in the mounting cavity, the guide sleeve is positioned at one end, close to the valve port, of the nut sleeve, one end, far away from the valve port, of the guide sleeve extends into the guide hole, the guide sleeve and the nut sleeve are coaxially arranged, and the guide sleeve and the guide hole are in interference fit. So set up, can be when welding annular mounting panel on first installation section, nut cover and valve body can be through uide bushing and guiding hole cooperation direction, location to further improve the axiality of the two.

By applying the technical scheme of the utility model, the inner diameter of the first installation section is larger than the outer diameter of the annular installation plate, the annular installation plate is in clearance fit with the first installation section, and the guide sleeve and the nut sleeve are coaxially arranged and in interference fit. In this technical scheme, when welding annular mounting panel, nut cover and valve body can be through uide bushing and guiding hole cooperation direction, location to guarantee the axiality of the two, and when welding first installation section and annular mounting panel together, the annular mounting panel is heated and has the deformation allowance, reduces the annular mounting panel from the possibility of perk in the first installation section, thereby guarantees that the axiality between nut cover and the valve body is better.

Further, the inner diameter of the first mounting section is D1, the outer diameter of the annular mounting plate is D2, and D1-D2 range from 0.02mm to 0.08 mm.

Furthermore, the inner diameter of the guide hole is D3, the outer diameter of the end of the guide sleeve far away from the valve port is D4, wherein D4-D3 are more than or equal to 0 and less than or equal to 0.1 mm. The guide sleeve and the guide hole can be relatively high in coaxiality, and the guide sleeve can be conveniently mounted in the guide hole.

Furthermore, D4 is more than or equal to 6.5mm and less than or equal to 8 mm.

Further, the thickness of the annular mounting plate is L1, and the height of the first mounting section is L2, wherein L1 is greater than L2. The first mounting section 111 can reflect laser in the direction away from the nut sleeve during welding, so that the nut sleeve is prevented from being deformed due to the fact that the nut sleeve is irradiated by the laser.

Further, the thickness L1 of the annular mounting plate ranges from 0.3mm to 1.2 mm.

Further, the inner diameter D1 of the first mounting section ranges from 13mm to 15 mm.

Further, the valve body includes disk seat and valve casing, is provided with installation cavity and valve port on the disk seat, and the installation cavity is located the one end of disk seat, and the valve port is located the other end of disk seat, and the valve casing is connected with the one end at the installation cavity place of disk seat, and the valve casing cover is established in the outside of nut shell. The annular mounting plate of the nut sleeve is fixed on the valve seat. The valve housing is used for accommodating the nut sleeve and closing the accommodating cavity.

Furthermore, the nut sleeve is also provided with a connecting hole communicated with the guide hole, the connecting hole is positioned at one end of the guide hole far away from the valve port, the connecting hole and the guide hole are coaxially arranged, and the electronic expansion valve further comprises a screw rod which is arranged in the nut sleeve in a penetrating way and is in threaded connection with the connecting hole. The screw rod is arranged in the connecting hole in a penetrating mode, and the screw rod moves linearly along the connecting hole when rotating.

Furthermore, the electronic expansion valve also comprises a valve sleeve, the valve sleeve is movably arranged in the guide sleeve, the valve sleeve is fixedly connected with one end of the screw rod, which is close to the valve port, and the screw rod drives the valve sleeve to move so as to plug or open the valve port. The valve sleeve is driven to plug or open the valve port by matching the screw rod and the nut sleeve, the structure is simple, and the positioning precision of the valve sleeve is high.

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 is a schematic diagram of an electronic expansion valve provided by the present invention;

FIG. 2 is a schematic view showing the assembly of the valve seat and the guide sleeve of FIG. 1;

FIG. 3 shows a schematic view of the nut shell of FIG. 1;

fig. 4 shows a schematic structural view of the guide sleeve of fig. 1.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a mounting cavity; 111. a first mounting section; 112. a second mounting section; 12. a valve port; 13. a valve seat; 14. a valve housing; 20. a nut sleeve; 21. an annular mounting plate; 22. a guide hole; 23. connecting holes; 30. a guide sleeve; 40. a screw; 50. and (3) valve housing.

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, an embodiment of the present invention provides an electronic expansion valve, which includes a valve body 10 and a nut sleeve 20. The valve body 10 has a mounting cavity 11 and a valve port 12, the mounting cavity 11 is communicated with the valve port 12, the mounting cavity 11 includes a first mounting section 111 and a second mounting section 112 which are arranged in a stepped manner, and the inner diameter of the first mounting section 111 is larger than that of the second mounting section 112. The first mounting section 111 and the second mounting section 112 are disposed on an inner wall of the mounting cavity 11, and the first mounting section 111 and the second mounting section 112 are integrally disposed with the valve body 10. The periphery of nut cover 20 is provided with annular mounting panel 21, and annular mounting panel 21 is located first installation section 111, and annular mounting panel 21 is connected with the inner wall welded of first installation section 111, and annular mounting panel 21 is clearance fit with the side of first installation section 111. The end of the nut sleeve 20 close to the valve port 12 is provided with a guide hole 22, the electronic expansion valve further comprises a guide sleeve 30, the guide sleeve 30 is partially positioned in the mounting cavity 11, the guide sleeve 30 is positioned at the end of the nut sleeve 20 close to the valve port 12, the end of the guide sleeve 30 far away from the valve port 12 extends into the guide hole 22, the guide sleeve 30 and the nut sleeve 20 are coaxially arranged, and the guide sleeve 30 and the guide hole 22 are in interference fit. With the above configuration, the guide sleeve 30 and the nut sleeve 20 can be kept coaxial with each other. The nut sleeve 20 and the guide sleeve 30 are fixedly connected, so that when the annular mounting plate 21 is welded, the nut sleeve 20 and the valve body 10 can be guided and positioned through the guide sleeve 30 and the guide hole 22 in a matched mode, coaxiality of the annular mounting plate 21 and the valve body 10 is further improved, and the annular mounting plate 21 and the first mounting section 111 can be positioned by means of the structure, so that influences on coaxiality when the annular mounting plate 21 and the first mounting section 111 are welded can be reduced. Alternatively, the annular mounting plate 21 and the nut sleeve 20 may be separate structures or may be an integrated structure. The ring-shaped mounting plate 21 is overlapped on the stepped surface between the first mounting section 111 and the second mounting section 112 to enhance the stability of the ring-shaped mounting plate 21.

By applying the technical scheme of the utility model, the annular mounting plate 21 is in clearance fit with the first mounting section 111, the guide sleeve 30 and the nut sleeve 20 are coaxially arranged and in interference fit, when the annular mounting plate 21 is welded, the nut sleeve 20 and the valve body 10 can be guided and positioned through the guide sleeve 30 and the guide hole 22 in a matching manner so as to ensure the coaxiality of the nut sleeve 20 and the nut sleeve 20, and when the first mounting section 111 and the annular mounting plate 21 are welded together, the annular mounting plate 21 is heated to have a deformation allowance, so that the possibility that the annular mounting plate 21 is tilted from the first mounting section 111 is reduced, and the coaxiality between the nut sleeve 20 and the valve body 10 is better.

In the present embodiment, the inner diameter of the first mounting section 111 is D1, the outer diameter of the annular mounting plate 21 is D2, and D1-D2 range from 0.02mm to 0.08 mm. If D1-D2 is smaller than 0.02mm, the gap between the annular mounting plate 21 and the first mounting section 111 is too small, the annular mounting plate 21 is easily tilted by thermal deformation during welding, and if D1-D2 is larger than 0.08mm, the gap between the annular mounting plate 21 and the first mounting section 111 is too large, the operation is difficult during welding the annular mounting plate 21 and the first mounting section 111, and the coaxiality is poor. Therefore, the range of D1-D2 is set to be 0.02mm to 0.08mm, the welding difficulty of the annular mounting plate 21 and the first mounting section 111 can be reduced, the annular mounting plate 21 is not prone to deformation and tilting during welding, and the annular mounting plate 21 and the first mounting section are enabled to keep good coaxiality.

As shown in FIG. 4, specifically, the inner diameter of the guide hole 22 is D3, and the outer diameter of the end of the guide sleeve 30 away from the valve port 12 is D4, wherein, D4-D3 are 0.1 mm. If D4-D3 is less than 0, the guide sleeve 30 and the guide hole 22 are in clearance fit, so that when the annular mounting plate 21 is welded, the nut sleeve 20 and the valve body 10 cannot be guided and positioned by the fit between the guide sleeve 30 and the guide hole 22. If D4-D3 is greater than 0.1mm, the guide sleeve 30 is difficult to install or cannot be installed in the guide hole 22, and therefore, setting D4-D3 to be greater than or equal to 0 and less than or equal to 0.1mm not only enables the guide sleeve 30 and the guide hole 22 to be in interference fit, but also enables the coaxiality of the valve body 10 and the nut sleeve 20 to be improved through the guiding and positioning in cooperation of the guide sleeve 30 and the guide hole 22 when the annular mounting plate 21 is welded, and enables the guide sleeve 30 to be easily installed in the guide hole 22. In particular, D4-D3 may be 0, 0.03mm or 0.06mm or 0.1 mm.

Specifically, D4 is more than or equal to 6.5mm and less than or equal to 8 mm. According to the scheme, D3 is more than or equal to 6.44mm and less than or equal to 8 mm. In this embodiment, D4 may be 6.5mm, 7mm or 8mm, and D3 may be 6.44mm, 6.95mm or 8 mm.

In the present embodiment, the thickness of the annular mounting plate 21 is L1, and the height of the first mounting section 111 is L2, wherein L1 is greater than L2. The nut sleeve 20 is typically made of a plastic material. L1 is set to be larger than L2, so that the first mounting section 111 can reflect the laser beam away from the nut sleeve 20 during welding, thereby avoiding the laser beam from irradiating on the nut sleeve 20 and causing the nut sleeve 20 to be deformed by heat.

Specifically, the thickness L1 of the annular mounting plate 21 ranges from 0.3mm to 1.2 mm. If L1 is smaller than 0.3mm, the structural strength of the annular mounting plate 21 is low, and the nut sleeve 20 cannot be stably supported by the annular mounting plate 21; if L1 is greater than 1.2mm, the annular mounting plate 21 occupies a larger space, which results in a larger volume of the valve body 10, and therefore, the range of L1 is set to 0.3mm to 1.2mm, which can make the structural strength of the nut sleeve 20 higher and the annular mounting plate 21 occupy a smaller space. Specifically, L1 may be 0.3mm, 0.6mm, 1mm, or 1.2 mm.

Specifically, the inner diameter D1 of the first mounting section 111 ranges from 13mm to 15 mm. Wherein, D1 can be 13mm, 14mm or 15 mm.

In this embodiment, the valve body 10 includes a valve seat 13 and a valve housing 14, the valve seat 13 is provided with an installation cavity 11 and a valve port 12, the installation cavity 11 is located at one end of the valve seat 13, the valve port 12 is located at the other end of the valve seat 13, the valve housing 14 is connected with one end of the installation cavity 11 of the valve seat 13, and the valve housing 14 covers the outside of the nut sleeve 20. The first installation section 111 and the second installation section 112 are arranged at one end of the installation cavity 11 far away from the valve port 12, the second installation section 112 and the inner wall of the installation cavity 11 are on the same plane, a groove with an L-shaped cross section is arranged at one end of the inner wall of the installation cavity 11 far away from the valve port 12, and the groove is arranged to form the first installation section 111 and the second installation section 112.

In this embodiment, the nut sleeve 20 is further provided with a connection hole 23 communicated with the guide hole 22, the connection hole 23 is located at one end of the guide hole 22 far away from the valve port 12, the connection hole 23 is coaxially arranged with the guide hole 22, and the electronic expansion valve further comprises a screw 40, wherein the screw 40 is inserted into the nut sleeve 20 and is in threaded connection with the connection hole 23. The connecting hole 23 is a threaded hole, the screw 40 is in threaded connection with the connecting hole 23, and the screw 40 moves linearly along the connecting hole 23 when rotating.

In this embodiment, the electronic expansion valve further comprises a valve sleeve 50, the valve sleeve 50 is movably disposed in the guide sleeve 30, the valve sleeve 50 is fixedly connected to an end of the screw 40 close to the valve port 12, and the screw 40 drives the valve sleeve 50 to move to close or open the valve port 12. The screw 40, the valve housing 50 and the valve port 12 are coaxially disposed. When the screw 40 rotates, the screw moves linearly along the connecting hole 23, the screw 40 drives the valve sleeve 50 to move linearly, and the valve sleeve 50 blocks or opens the valve port 12.

By applying the technical scheme of the utility model, the annular mounting plate 21 is in clearance fit with the first mounting section 111, so that when the first mounting section 111 is welded with the annular mounting plate 21, the annular mounting plate 21 is heated to have deformation allowance, the possibility that the annular mounting plate 21 is tilted from the first mounting section 111 is reduced, and the coaxiality of the nut sleeve 20 and the valve body 10 is better; the range of D1-D2 is set to be 0.02 mm-0.08 mm, so that the welding difficulty of the annular mounting plate 21 and the first mounting section 111 can be reduced, the annular mounting plate 21 is not easy to deform and tilt during welding, and the annular mounting plate 21 and the first mounting section maintain good coaxiality; the guide sleeve 30 and the guide hole 22 are in interference fit, namely the nut sleeve 20 and the guide sleeve 30 are fixedly connected, so that when the annular mounting plate 21 is welded, the nut sleeve 20 and the valve body 10 can be guided and positioned through the guide sleeve 30 and the guide hole 22 in a matched mode, the coaxiality of the nut sleeve 20 and the valve body 10 is further improved, and the positioning is carried out through the structure, the influence of the annular mounting plate 21 and the first mounting section 111 on the coaxiality during welding can be reduced, and the coaxiality between the nut sleeve 20 and the valve body 10 is further guaranteed; the thickness of the annular mounting plate 21 is L1, the height of the first mounting section 111 is L2, wherein L1 is set to be larger than L2, so that the first mounting section 111 can reflect the laser outward during welding, thereby avoiding the deformation of the nut sleeve 20 caused by the laser irradiation due to heating.

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 body (10) is provided with a mounting cavity (11) and a valve port (12), the mounting cavity (11) is communicated with the valve port (12), the mounting cavity (11) comprises a first mounting section (111) and a second mounting section (112) which are arranged in a stepped mode, and the inner diameter of the first mounting section (111) is larger than that of the second mounting section (112);

the nut sleeve (20), an annular mounting plate (21) is arranged on the periphery of the nut sleeve (20), the annular mounting plate (21) is located in the first mounting section (111), the annular mounting plate (21) is connected with the inner wall of the first mounting section (111) in a welding mode, and the annular mounting plate (21) is in clearance fit with the side face of the first mounting section (111);

the electronic expansion valve is characterized in that one end, close to the valve port (12), of the nut sleeve (20) is provided with a guide hole (22), the electronic expansion valve further comprises a guide sleeve (30), the guide sleeve (30) is partially located in the installation cavity (11), the guide sleeve (30) is located at one end, close to the valve port (12), of the nut sleeve (20), one end, far away from the valve port (12), of the guide sleeve (30) extends into the guide hole (22), the guide sleeve (30) and the nut sleeve (20) are coaxially arranged, and the guide sleeve (30) and the guide hole (22) are in interference fit.

2. An electronic expansion valve according to claim 1, wherein the first mounting section (111) has an inner diameter D1, the annular mounting plate (21) has an outer diameter D2, and D1-D2 range between 0.02mm and 0.08 mm.

3. The electronic expansion valve of claim 2, wherein the guide hole (22) has an inner diameter D3, and the guide sleeve (30) has an outer diameter D4 at an end thereof remote from the valve port (12), wherein 0. ltoreq. D4-D3. ltoreq.0.1 mm.

4. An electronic expansion valve according to claim 3, wherein 6.5mm ≦ D4 ≦ 8 mm.

5. An electronic expansion valve according to claim 1, wherein the annular mounting plate (21) has a thickness of L1 and the first mounting section (111) has a height of L2, wherein L1 is larger than L2.

6. An electronic expansion valve according to claim 5, wherein the thickness L1 of the annular mounting plate (21) is in the range of 0.3mm to 1.2 mm.

7. An electronic expansion valve according to claim 1, wherein the inner diameter D1 of the first mounting section (111) is in the range of 13mm to 15 mm.

8. An electronic expansion valve according to claim 1, wherein the valve body (10) comprises a valve seat (13) and a valve housing (14), the valve seat (13) is provided with the mounting chamber (11) and the valve port (12), the mounting chamber (11) is located at one end of the valve seat (13), the valve port (12) is located at the other end of the valve seat (13), the valve housing (14) is connected to the end of the valve seat (13) where the mounting chamber (11) is located, and the valve housing (14) covers the outside of the nut sleeve (20).

9. The electronic expansion valve according to claim 2, wherein the nut sleeve (20) is further provided with a connection hole (23) communicating with the guide hole (22), the connection hole (23) is located at an end of the guide hole (22) away from the valve port (12), the connection hole (23) is coaxially arranged with the guide hole (22), and the electronic expansion valve further comprises a screw rod (40), and the screw rod (40) is inserted into the nut sleeve (20) and is in threaded connection with the connection hole (23).

10. An electronic expansion valve according to claim 9, further comprising a valve housing (50), wherein the valve housing (50) is movably disposed in the guide sleeve (30), the valve housing (50) is fixedly connected to an end of the screw (40) close to the valve port (12), and the screw (40) drives the valve housing (50) to move to close or open the valve port (12).