CN220551575U

CN220551575U - Nut for electronic expansion valve

Info

Publication number: CN220551575U
Application number: CN202322223650.XU
Authority: CN
Inventors: 张永涛; 何泽淼; 何永水
Original assignee: Zhejiang Hengsen Industry Group Co ltd
Current assignee: Zhejiang Hengsen Industry Group Co ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2024-03-01
Anticipated expiration: 2033-08-16

Abstract

The application discloses nut for electronic expansion valve relates to the electronic expansion valve field, and it includes the expansion valve body, sets up in the inside nut of expansion valve body, the heat-proof tank has been seted up to the nut terminal surface, the heat-proof tank lateral wall is fixed with the heat insulating board. The application has the effect of improving the service life of the electronic expansion valve.

Description

Nut for electronic expansion valve

Technical Field

The application relates to the field of electronic expansion valves, in particular to a nut for an electronic expansion valve.

Background

The electronic expansion valve utilizes the electric signal generated by the adjusted parameters to control the voltage or current applied to the expansion valve, so as to achieve the purpose of adjusting the liquid supply amount, and a nut is fixed inside the electronic expansion valve and is usually fixed with the electronic expansion valve in a laser welding mode.

Patent publication number CN110296258A discloses an electronic expansion valve comprising: the valve seat is provided with a valve seat cavity and a valve port; a core assembly at least partially movably disposed in the valve seat cavity; the screw rod and the nut are matched through threads, the screw rod can rotate along the axis of the screw rod, the screw rod does not move along the axial direction, the nut can move along the axial direction through the threaded matching effect, the nut does not rotate circumferentially, and the nut is fixedly connected with the core body component; the driving mechanism comprises a rotor and a coil, the rotor is fixedly connected with the screw rod, the rotor drives the screw rod to rotate through the coil, and the nut drives the core body assembly to approach or depart from the valve port through the threaded cooperation of the screw rod and the nut. By applying the technical scheme of the utility model, the problem of high cost of the electronic expansion valve in the background technology can be effectively solved.

In the process of realizing the application, the inventor finds that at least the following problems exist in the technology, the outer side wall of the nut is attached to the inner side wall of the electronic expansion valve in the fixing process of the nut, the welding heat can directly influence the inside of the nut in the welding process, and the welding heat transfer can damage the nut, so that the service life of the electronic expansion valve is reduced.

Disclosure of Invention

In order to improve the service life of an electronic expansion valve, the application provides a nut for the electronic expansion valve.

The nut for the electronic expansion valve adopts the following technical scheme:

the nut for the electronic expansion valve comprises an expansion valve body, and is arranged in the expansion valve body, wherein a heat insulation groove is formed in the end face of the nut, and a heat insulation plate is fixed on the side wall of the heat insulation groove.

Through adopting above-mentioned technical scheme, because nut and expansion valve body diameter adopt welded fastening's mode, in the welding process, thermal-insulated groove and heat insulating board combined action can effectively reduce the influence that welding heat transfer caused the nut, and the nut of so setting simultaneously can reduce its inside possibility that produces the gas pocket when making, and in the installation, the cooperation between heat insulating board and the expansion valve body inside wall has elasticity, can reduce the internal stress and influence the possibility of the inside motion size of nut.

Optionally, the heat insulation tank inside wall is the slope setting, and the nut deviates from the inside wall at expansion valve body top and is close to the nut axis when the installation, and the inside wall that is close to expansion valve body top is kept away from the nut axis.

Through adopting above-mentioned technical scheme, the slope of heat-insulating tank inside wall sets up, and the nut can not receive the influence of horizontal direction effort in the injection molding process, has further reduced the inside possibility that produces the gas pocket of nut.

Optionally, the end face of the heat insulation groove is provided with a connecting part, and the connecting part is provided with a threaded hole penetrating the connecting part.

Through adopting above-mentioned technical scheme, offer the screw hole in the connecting portion, the installation of the internal part of expansion valve body of being convenient for.

Optionally, the nut is provided with a communicating hole, the communicating hole and the threaded hole are coaxially arranged, and the diameter of the communicating hole is larger than that of the threaded hole.

Through adopting above-mentioned technical scheme, the intercommunicating pore diameter is greater than the screw hole diameter, has reduced the difficult possibility of installing when installing expansion valve body internals.

Optionally, the outer side wall of the nut is fixed with a mounting part, the mounting part and the nut are coaxially arranged, and the side wall of the mounting part is provided with a positioning groove.

Through adopting above-mentioned technical scheme, the installation department is used for being connected with the expansion valve body, and can be with nut position fixing with installation department and expansion valve body are fixed, and the constant head tank is convenient for fix a position the position of installation department and nut, has reduced the possibility that the nut position takes place the skew.

Optionally, a relief groove is formed in the end face, away from the connecting portion, of the nut.

By adopting the technical scheme, the offering of the abdication groove is convenient for the nut to be in a dark turning process, and meanwhile, due to the existence of the abdication groove, the materials used for injection molding of the nut are reduced, and the economic benefit is improved.

Optionally, the connecting portion lateral wall is provided with a plurality of backup pads, backup pad one end is fixed in connecting portion lateral wall, and the other end is fixed in the heat insulating board, a plurality of backup pads are around nut axis direction evenly distributed.

Through adopting above-mentioned technical scheme, the backup pad has played the supporting role to the heat insulating board, reduces the possibility that the heat insulating board damaged, has promoted the life of nut.

In summary, the present application includes at least one of the following beneficial technical effects:

1. because the nut and the expansion valve body are welded and fixed in diameter, the heat insulation groove and the heat insulation plate act together in the welding process, so that the influence of welding heat transfer on the nut can be effectively reduced;

2. in the installation process, the fit between the heat insulation plate and the inner side wall of the expansion valve body has elasticity, so that the possibility that the internal stress influences the internal movement size of the nut can be reduced.

Drawings

Fig. 1 is a cross-sectional view of a body structure of an embodiment of the present application.

Fig. 2 is a cross-sectional view of a nut structure.

Fig. 3 is a schematic view of the nut structure.

Reference numerals illustrate:

1. an expansion valve body; 2. a nut; 3. a heat insulation tank; 4. a heat insulating plate; 5. a connection part; 6. a threaded hole; 7. a communication hole; 8. a mounting part; 9. a relief groove; 10. a support plate; 11. and a positioning groove.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a nut for an electronic expansion valve. Referring to fig. 1 and 2, a nut for an electronic expansion valve includes an expansion valve body 1, a nut 2 disposed inside the expansion valve body 1, the nut 2 is used for penetrating a screw rod and dividing the expansion valve body 1 into an upper portion and a lower portion, after the nut 2 is fixed, an outer side wall of the nut 2 is attached to an inner side wall of the expansion valve body 1 and coaxially disposed therewith, a communicating pipe is fixed at the bottom of the expansion valve body 1, the communicating pipe is communicated with the expansion valve body 1, a heat insulation groove 3 is disposed on an end surface of the nut 2 opposite to the bottom of the expansion valve body 1, a heat insulation plate 4 is fixed on a side wall of the heat insulation groove 3, the fixing manner can be bonding, welding, integral forming and other manners, in this embodiment, an integral forming fixing manner is adopted, in a manufacturing process of the nut 2, an injection molding manner is adopted to enable the nut 2 to be integrally formed, and meanwhile, an outer side wall of the heat insulation plate 4 is flush with an outer side wall of the nut 2, so designed nut 2 can effectively reduce excessive shrinkage of the interior of the nut 2 or possibility of generating air holes inside the nut 2 when the nut 2 is injection molded, and meanwhile, due to the existence of the heat insulation plate 4, the cooperation between the nut 2 and the expansion valve body 1 has elasticity when being mounted, the nut 2 has the influence on the internal dimension of the internal movement of the nut 2 is possible.

Referring to fig. 1 and 2, the inner side wall of the heat insulation groove 3 is obliquely arranged, and when the nut 2 is installed, the inner side wall deviating from the top of the expansion valve body 1 is close to the axis of the nut 2, and the inner side wall near the top of the expansion valve body 1 is far away from the axis of the nut 2, so that the diameter of the inner side wall of the heat insulation groove 3 is continuously reduced from top to bottom; the end face of the nut 2 provided with the heat insulation groove 3 is fixedly provided with the connecting part 5, the fixing mode can be bonding, welding, integrated forming and the like, the integrated forming fixing mode is adopted in the embodiment, the diameter of the inner side wall of the heat insulation groove 3 is continuously reduced from top to bottom to be the same as that of the connecting part 5, the connecting part 5 and the nut 2 are coaxially arranged, the connecting part 5 is provided with the threaded hole 6, the connecting part 5 is penetrated by the threaded hole 6 along the axis direction of the connecting part 5, the nut 2 is provided with the communication hole 7, the nut 2 is penetrated by the communication hole 7 along the axis direction of the nut 2, meanwhile, the communication hole 7 is communicated with the threaded hole 6, and the communication hole 7 and the threaded hole 6 are coaxially arranged due to the coaxial arrangement of the connecting part 5 and the nut 2, and the diameter of the communication hole 7 is larger than that of the threaded hole 6.

Referring to fig. 2 and 3, the outer side wall of the nut 2 is fixed with a mounting portion 8, where the fixing manner may be bonding, welding, clamping, etc., in this embodiment, the fixing manner of clamping is adopted, the mounting portion 8 and the nut 2 are coaxially arranged, the diameter of the mounting portion 8 is larger than that of the nut 2, the mounting portion 8 is used for positioning the position of the nut 2, and is fixed with the expansion valve body 1 through laser welding during mounting, positioning slots 11 are provided on the side wall of the connecting portion 5, the number of the positioning slots 11 in this embodiment is two, and the positioning slots 11 are convenient for positioning the mounting portion 8 and the nut 2, thereby reducing the possibility of shifting the position of the nut 2 during mounting.

Referring to fig. 2 and 3, the end face of the nut 2 deviating from the connecting portion 5 is provided with the abdication groove 9, the abdication groove 9 and the nut 2 are coaxially arranged, the abdication groove 9 reduces materials required by injection molding of the nut 2, economic benefit is improved, the outer side wall of the connecting portion 5 is provided with a plurality of support plates 10, the length direction of the support plates 10 is parallel to the axis direction of the nut 2, one end of each support plate 10 is fixed on the outer side wall of the connecting portion 5, the other end of each support plate is fixed on the side wall of the corresponding heat insulation plate 4, the fixing mode of the support plates 10 can be bonding, welding, integrally forming and the like, the fixing mode of the support plates 10 is adopted in the embodiment, meanwhile, the plurality of support plates 10 are uniformly distributed around the axis direction of the nut 2, the support plates 10 play a supporting role on the heat insulation plate 4, the possibility of damage of the heat insulation plate 4 is reduced, the end part of the heat insulation plate 4 is obliquely arranged, the end part of the heat insulation plate 4 is close to the axis position of the connecting portion 5, the end part of the heat insulation plate 4 is far away from the axis of the connecting portion 5, and the effect of the installation of the nut 2 can be conveniently realized at the same time, and the possibility that the end face of the heat insulation plate 4 is abutted against the expansion valve body 1 is not easy to install the nut 2 is reduced.

The implementation principle of the nut for the electronic expansion valve in the embodiment of the application is as follows: after the nut 2 is injection molded, the nut is installed inside the expansion valve body 1, the heat insulation plate 4 and the heat insulation groove 3 play a role in reducing heat transfer, when the installation part 8 is welded to the expansion valve body 1, the welding heat transfer can be effectively reduced, thereby the service life of the expansion valve is prolonged, meanwhile, the structure designed in the way is more convenient in injection molding, excessive reduction and the generation of air holes inside the nut 2 are reduced, in the installation process of the nut 2, the cooperation between the outer side wall of the nut 2 and the inner side wall of the expansion valve body 1 has elasticity, and the possibility that the internal stress influences the internal movement size of the nut 2 is reduced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a nut for electronic expansion valve which characterized in that: the expansion valve comprises an expansion valve body (1), a nut (2) arranged inside the expansion valve body (1), a heat insulation groove (3) is formed in the end face of the nut (2), and a heat insulation plate (4) is fixed on the side wall of the heat insulation groove (3).

2. The nut for an electronic expansion valve according to claim 1, wherein: the inner side wall of the heat insulation groove (3) is obliquely arranged, and the inner side wall of the top of the nut (2) deviating from the expansion valve body (1) during installation is close to the axis of the nut (2), and the inner side wall of the top of the expansion valve body (1) is close to the axis of the nut (2).

3. The nut for an electronic expansion valve according to claim 1, wherein: the nut (2) is provided with a connecting part (5) fixed on the end face of the heat insulation groove (3), and the connecting part (5) is provided with a threaded hole (6) penetrating the connecting part (5).

4. A nut for an electronic expansion valve according to claim 3, characterized in that: the nut (2) is provided with a communication hole (7), the communication hole (7) and the threaded hole (6) are coaxially arranged, and the diameter of the communication hole (7) is larger than that of the threaded hole (6).

5. The nut for an electronic expansion valve according to claim 1, wherein: the nut is characterized in that an installation part (8) is fixed on the outer side wall of the nut (2), the installation part (8) and the nut (2) are coaxially arranged, and a positioning groove (11) is formed in the side wall of the installation part (8).

6. A nut for an electronic expansion valve according to claim 3, characterized in that: and an abdication groove (9) is formed in the end face, deviating from the connecting part (5), of the nut (2).

7. A nut for an electronic expansion valve according to claim 3, characterized in that: the connecting portion (5) lateral wall is provided with a plurality of backup pads (10), backup pad (10) one end is fixed in connecting portion (5) lateral wall, and the other end is fixed in heat insulating board (4), a plurality of backup pad (10) are around nut (2) axis direction evenly distributed.