CN114776823B

CN114776823B - Valve device

Info

Publication number: CN114776823B
Application number: CN202210446984.0A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2024-03-19
Anticipated expiration: 2042-04-26
Also published as: CN114776823A

Abstract

The invention discloses a valve device, which comprises a valve seat body, wherein the valve seat body comprises a valve seat and a valve sleeve, the valve seat is provided with a mounting hole part, the valve sleeve is provided with an inserting column part matched with the mounting hole part, and the valve sleeve also comprises a limit column part connected with the inserting column part; along the direction of keeping away from spacing post portion, grafting post portion includes a plurality of branch posts that radial size reduces gradually, and the branch post of immediately adjacent spacing post portion includes the close-fitting section with mounting hole portion press-fit, spacing post portion offsets with the disk seat. According to the valve seat body, the plug-in column part of the valve sleeve is designed in a sectional mode, on one hand, each level of branch columns can guide the insertion of the plug-in column part step by step, so that the smoothness of coaxial forward installation and press installation of the plug-in column part and the mounting hole part is ensured as much as possible; on the other hand, the axial dimension of the close-fitting section is smaller, the press-fitting force can be smaller, and the plug-in column part is guaranteed to be fully inserted, so that the limit column part is abutted against the valve seat.

Description

Valve device

Technical Field

The invention relates to the technical field of refrigeration control, in particular to a valve device.

Background

The valve seat body of the valve device such as the electric valve generally comprises a valve seat, a valve sleeve and a connecting pipe, wherein the valve sleeve and the connecting pipe are arranged on the valve seat, and the valve sleeve is internally provided with components such as a valve needle, wherein the valve sleeve and the valve seat are in interference press fit, at the moment, how to ensure the forward press fit of the valve sleeve and the valve seat as much as possible and ensure the smoothness of the press fit is still a technical problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a valve device, wherein the plug-in column part of a valve sleeve of a valve seat body adopts a sectional design, the radial dimension of each sub-column is gradually reduced along the direction away from a limit column part, and only the sub-column adjacent to the limit column part is provided with a tight-fit section in interference fit with a mounting hole part, so that on one hand, each level of sub-column can be guided step by step to ensure the smoothness of forward press fitting and press fitting of the valve sleeve as much as possible, and on the other hand, the axial dimension of the tight-fit section is shorter, and the required press fitting force is smaller.

In order to solve the technical problems, the invention provides a valve device, which comprises a valve seat body, wherein the valve seat body comprises a valve seat and a valve sleeve, the valve seat is provided with a mounting hole part, the valve sleeve is provided with a plug-in column part matched with the mounting hole part, and the valve sleeve also comprises a limit column part connected with the plug-in column part; along keeping away from the direction of spacing post portion, grafting post portion includes a plurality of branches that radial size reduces gradually, and immediately spacing post portion branch the post include with mounting hole portion press fit's close-fitting section, spacing post portion with the disk seat offsets.

According to the valve device provided by the invention, the plug-in column part of the valve sleeve of the valve seat body adopts a sectional design, the radial dimension of each sub-column is gradually reduced along the direction away from the limit column part, and only the sub-column adjacent to the limit column part is provided with a close-fitting section in interference fit with the mounting hole part. By adopting the structure, on one hand, the insertion can be conveniently carried out, and each stage of branch columns can guide the insertion of the insertion column part step by step so as to ensure that the insertion column part and the mounting hole part can be coaxially and positively mounted as far as possible, and further ensure the smoothness of press mounting; on the other hand, the close-fitting section is only a part of the plug-in column part in the axial direction, the axial dimension of the close-fitting section is smaller, the press-fitting force required when the valve sleeve is pressed and fitted can be smaller, and the close-fitting section is more beneficial to ensuring that the plug-in column part is fully inserted into the mounting hole part, so that the limit column part is abutted against the valve seat, and the reliable assembly of the valve sleeve and the valve seat is completed.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a valve sleeve;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of another embodiment of a valve sleeve;

FIG. 4 is a view of the relative positions of the valve sleeve and the valve seat during initial installation of the valve sleeve;

FIG. 5 is an enlarged view of a portion of the valve sleeve as it is inserted into a portion of the valve sleeve at the junction with the valve seat;

FIG. 6 is a diagram showing the connection structure of the valve sleeve and the valve seat when the valve sleeve is fully inserted;

fig. 7 is a structural diagram showing the connection of the valve sleeve and the valve seat after the completion of the welding.

The reference numerals in fig. 1-7 are illustrated as follows:

1a valve seat, 11 a mounting hole part and 111 a solder inlet groove;

2 valve sleeve, 21 plug-in column part, 21a close-fitting section, 211 constant diameter section, 212 conical section, 213 solder tank, 22 limit column part and 221 notch;

3 take over

And A, solder inlet.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The term "plurality" as used herein refers to a plurality, typically two or more, of indefinite quantities; and when "a number" is used to denote the number of a certain number of components, the number of components is not necessarily related to each other.

Referring to fig. 1 to 7, fig. 1 is a schematic structural view of an embodiment of a valve sleeve, fig. 2 is a partial sectional view of fig. 1, fig. 3 is a schematic structural view of another embodiment of a valve sleeve, fig. 4 is a relative position diagram of a valve sleeve and a valve seat when the valve sleeve is initially installed, fig. 5 is a partial enlarged view of a junction of the valve sleeve and the valve seat when the valve sleeve is partially inserted, fig. 6 is a connection structure diagram of the valve sleeve and the valve seat when the valve sleeve is fully inserted, and fig. 7 is a connection structure diagram of the valve sleeve and the valve seat after welding is completed.

As shown in fig. 6 and 7, and with reference to fig. 1 and 2, the present invention provides a valve device, comprising a valve seat body, the valve seat body comprising a valve seat 1, a valve sleeve 2 and a connection pipe 3, the valve seat 1 being provided with a mounting hole portion 11 for fastening the valve sleeve 2, the valve sleeve 2 being provided with a plug-in post portion 21 mated with the mounting hole portion 11, the valve sleeve 2 further comprising a limit post portion 22 connected to the plug-in post portion 21; along the direction of keeping away from spacing post portion 22, grafting post portion 21 includes a plurality of branches that radially size reduces gradually, and just the branch post of next-door neighbour spacing post portion 22 include with mounting hole portion 11 press fit's tight-fitting section 21a, when the whole inserts mounting hole portion 11 of grafting post portion 21, spacing post portion 22 offsets tightly with disk seat 1.

According to the valve seat body provided by the invention, the plug-in column part 21 of the valve sleeve 2 is of a sectional design, the radial dimension of each sub-column is gradually reduced along the direction away from the limit column part 22, and only the sub-column adjacent to the limit column part 22 is provided with a tight-fit section 21a in interference fit with the mounting hole part 11. By adopting the structure, on one hand, the insertion can be conveniently carried out, and each stage of branch columns can gradually guide the insertion of the insertion column part 21 so as to ensure that the insertion column part 21 and the mounting hole part 11 can be coaxially and positively mounted as far as possible, and further ensure the smoothness of press mounting; on the other hand, the tight-fit section 21a is only a part of the plug-in post portion 22 in the axial direction, and its axial dimension is smaller, so that the press-fit force required when the valve sleeve 2 is press-fitted can be smaller, which is more advantageous for ensuring that the plug-in post portion 21 is fully inserted into the mounting hole portion 11, so that the limit post portion 22 abuts against the valve seat 1, thereby completing the reliable assembly of the valve sleeve 2 and the valve seat 1.

Here, the embodiment of the present invention is not limited to the specific values of the number of split columns included in the plug-in column portion 21 and the axial dimension of the tight-fitting section 21a, and a person skilled in the art may design according to actual needs when implementing the present invention.

In a specific embodiment, the axial dimension of the mating section 21a can be designed to be smaller than the axial dimension of the rest of the plug-in post section 21, i.e. the axial dimension of the mating section 21a is smaller than half the axial dimension of the plug-in post section 21.

It is known that the valve needle is to be mounted in the valve housing 2, and therefore, the valve housing 2 and the plug-in post portion 21 are both cylindrical members. For convenience of description, the portion of the valve seat 1 having the mounting hole portion 11 may be referred to as a mounting valve body portion, three times the wall thickness of the smaller one of the two mating members of the plug-in post portion 21 and the mounting valve body portion may be a set size, and in practical application, the axial dimension of the fitting section 21a may be defined by the set size, specifically, the axial dimension of the fitting section 21a may be designed to be smaller than the set size described above.

Except for the sub-columns having the tight-fit sections 21a, the outer diameter of each of the remaining sub-columns may be smaller than the inner diameter of the mounting hole portion 11, which is more advantageous in ensuring smooth insertion of the plug-in column portion 21. Of course, the radial dimension of the sub-column adjacent to the sub-column having the close-fitting section 21a may also be designed to coincide with the mounting hole portion 11, which does not affect the insertion of the plug-in column portion 21.

With continued reference to fig. 2, each sub-column may include an equal diameter section 211 and a tapered section 212, where the tapered section 212 is a guiding section, and may guide insertion of the plug-in column portion 21 and assist alignment of the plug-in column portion 21 to ensure that the plug-in column portion 21 can be coaxially assembled as much as possible, and meanwhile, the tapered section 212 is also a transitional connection section, and along a direction away from the limiting column portion 22, a radial dimension of a small diameter end of the tapered section 212 of an upstream sub-column may be consistent with a radial dimension of the equal diameter section 211 of a downstream adjacent sub-column, and the equal diameter section 211 of a sub-column adjacent to the limiting column portion 22 may be the tight-fitting section 21a.

Further, as shown in fig. 5, a dimension L1 of a diagonal line of a cross section of the constant diameter section 211 passing through the central axis of the column section (the lowermost column section in the drawing) farthest from the stopper column section 22 may be smaller than an inner diameter L2 of the mounting hole section 11. With this design, even if the plug post portion 21 is deflected by a small angle from the mounting hole portion 11 at the time of initial mounting, the plug post portion 21 can be smoothly inserted, and the valve housing 2 can be more easily assembled.

After the press fitting of the valve sleeve 2 is completed, in order to ensure the connection reliability of the valve sleeve 2 and the valve seat 1, the valve sleeve 2 and the valve seat 1 are usually required to be welded, and a common welding mode is furnace welding. To facilitate the filling and flowing of the solder, a solder groove 213 may be provided on the inner wall of the mounting hole portion 11 and/or the outer wall of the plug post portion 21, and the solder may flow from bottom to top and fill each solder groove 213 to solder the valve housing 2 and the valve seat 1.

The shape, number, mounting positions, and the like of the solder tanks 213 are not limited, and may be specifically determined according to actual conditions. For example, the shape of the solder bath 213 may be any one of a spiral type (as shown in fig. 1), a curved type, a straight type (as shown in fig. 3), or a combination of any several types; the solder grooves 213 may be distributed only on the outer wall of the close-fitting section 21a, but may be distributed over the entire plug-in post portion 21.

Referring to fig. 4 and 6, the inner wall of the mounting hole portion 11 may be provided with solder inlet grooves 111, and the solder inlet grooves 111 may form solder inlets a in cooperation with the tapered sections 212 of the sub-columns farthest from the stopper column portion 22, and during soldering, solder may enter from the solder inlets a and gradually fill in the gaps between the plug column portion 21 and the mounting hole portion 11 and the respective solder inlet grooves 111.

Since such welding is internal welding, it is difficult to visually observe the welding from the outside of the valve seat body. Therefore, in the embodiment of the present invention, the gap 221 is formed at the abutting position of the limit post portion 22 and the valve seat 1, and the gap 221 may be located on the valve seat 1, or may be located on the limit post portion 22, or may be located on both the valve seat 1 and the limit post portion 22, and the gap 221 may be communicated with the solder groove 213, so that when the solder is sufficient, the solder may flow out from the gap 221, and thus, the filling condition of the solder may be intuitively determined, as shown in fig. 7, and when the welding is completed, the solder may seal the gap 221.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The valve device comprises a valve seat body and is characterized in that the valve seat body comprises a valve seat (1) and a valve sleeve (2), the valve seat (1) is provided with a mounting hole part (11), the valve sleeve (2) is provided with a plug-in column part (21) matched with the mounting hole part (11), and the valve sleeve (2) further comprises a limit column part (22) connected with the plug-in column part (21);

along the direction far away from the limit column part (22), the plug-in column part (21) comprises a plurality of sub-columns with gradually reduced radial sizes, the sub-columns adjacent to the limit column part (22) comprise tight-fit sections (21 a) which are in press fit with the mounting hole parts (11), and the limit column part (22) is propped against the valve seat (1);

a solder groove (213) is formed in the inner wall of the mounting hole part (11) and/or the outer wall of the plug-in column part (21), a gap (221) is formed in the tight abutting part of the limit column part (22) and the valve seat (1), and the gap (221) is communicated with the solder groove (213);

each sub-column comprises a constant diameter section (211) and a conical section (212), wherein the small diameter end of the conical section (212) of the upstream sub-column is connected with the constant diameter section (211) of the downstream adjacent sub-column along the direction away from the limit column part (22), and the constant diameter section (211) of the sub-column adjacent to the limit column part (22) is the close fit section (21 a);

the diagonal dimension of the section of the equal diameter section (211) passing through the central axis of the sub-column farthest from the limit column part (22) is smaller than the inner diameter of the mounting hole part (11).

2. Valve device according to claim 1, wherein the outer diameter of each of the other sub-columns except the sub-column comprising the tight-fitting section (21 a) is smaller than the inner diameter of the mounting hole portion (11).

3. Valve device according to claim 1, characterized in that the axial dimension of the tight-fitting section (21 a) is smaller than the axial dimension of the rest of the plug-in stud portion (21); and/or the number of the groups of groups,

the valve seat (1) is provided with a mounting hole part (11), the part is a mounting valve body part, three times of the wall thickness of the smaller one of the mounting valve body part and the plug-in column part (21) is a set size, and the axial size of the close-fitting section (21 a) is smaller than the set size.

4. A valve arrangement according to any one of claims 1-3, characterized in that the solder channels (213) are distributed only to the outer wall of the tight-fitting section (21 a).

5. A valve arrangement according to any one of claims 1-3, characterized in that the solder bath (213) is any one or a combination of any of a spiral, a curved, a straight type.

6. A valve device according to any one of claims 1-3, wherein the inner wall of the mounting hole portion (11) is provided with a solder inlet groove (111), and a solder inlet (a) is formed between the solder inlet groove (111) and the stopper post portion (22).