Valve device

Abstract

The invention discloses a valve device which comprises a guide sleeve and a valve seat, and the valve seat is provided with a mounting hole. A first step face is formed on the guide sleeve, part of the guide sleeve is located in the mounting hole, the first step face abuts against the outer end face of the valve seat, a welding seam groove is formed between the guide sleeve and the part, matched with the hole diameter of the mounting hole, of the guide sleeve, and an opening channel is formed in the guide sleeve and / or the valve seat. And the opening channel is communicated with the welding seam groove. By the adoption of the structure, during welding, welding flux located in the valve seat can flow along the welding seam groove, when the welding flux overflows through the opening channel, it is indicated that welding is finished, and the welding end point can be visually judged; and when the welding flux overflows from the opening channel, the welding flux is effectively filled between the guide sleeve and the valve seat, and the effectiveness of the welding seam quality can be quickly confirmed.

Description

[0001] This application is a divisional application of the invention patent application No. 202111193254.6, filed on October 13, 2021, with the Chinese Patent Office, and entitled "Valve device". TECHNICAL FIELD

[0002] The present application relates to the technical field of refrigeration control, in particular to a valve device. BACKGROUND

[0003] The valve device, such as an electronic expansion valve, generally includes a guide sleeve and a valve seat, the valve seat is provided with a mounting hole, in the assembled state, the guide sleeve is inserted into the mounting hole, and the guide sleeve and the valve seat are fixed by welding. After the guide sleeve and the valve seat are welded, it is not easy to visually check the welding quality from the outside. SUMMARY

[0004] The purpose of the present application is to provide a valve device, the welding end point and welding quality of the guide sleeve and the valve seat can be visually judged.

[0005] To solve the above technical problems, the present application provides a valve device, including a guide sleeve and a valve seat, the valve seat is provided with a mounting hole; the guide sleeve is formed with a first step surface, part of the guide sleeve is located in the mounting hole, the first step surface abuts against the outer end surface of the valve seat, a welding groove is formed between the part of the guide sleeve and the mounting hole with a hole diameter that is matched, the guide sleeve and / or the valve seat is formed with an open channel, and the open channel is in communication with the welding groove.

[0006] With the above structure, the welding groove is formed between the guide sleeve and the mounting hole, and the guide sleeve and / or the valve seat is formed with an open channel. When welding, the welding material inside the valve seat can flow along the welding groove. When the welding material overflows through the open channel, it indicates that the welding is completed, and the staff can relatively intuitively judge the welding end point. When the welding material overflows from the open channel, it also indicates that the welding material has effectively filled the entire axial range of the part of the guide sleeve and the mounting hole with a hole diameter that is matched, which can also facilitate the staff to quickly confirm the effectiveness of the welding quality.

[0007] The present application also provides a valve device, including a guide sleeve and a valve seat, the valve seat is provided with a mounting hole; the inner hole wall of the mounting hole is formed with a second step surface, part of the guide sleeve is located in the mounting hole and abuts against the second step surface, a welding groove is formed between the part of the guide sleeve and the mounting hole with an inner diameter that is matched, and the outlet of the welding groove is exposed. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The structure schematic diagram of one specific embodiment of the valve device provided by the present application;

[0009] Figure 2 Fig. 1 is a structural schematic view of a valve device according to an embodiment of the present application; Figure 1 Fig. 2 is a structural schematic view of a guide sleeve according to an embodiment of the present application;

[0010] Figure 3 Fig. 3 is a sectional view of the guide sleeve according to an embodiment of the present application; Figure 2 Fig. 4 is a sectional view of the guide sleeve according to another embodiment of the present application;

[0011] Figure 4 Fig. 5 is a structural schematic view of a valve seat according to an embodiment of the present application; Figure 1 Fig. 6 is a structural schematic view of another embodiment of the valve seat according to the present application;

[0012] Figure 5 Fig. 7 is a sectional view of the valve seat according to an embodiment of the present application; Figure 1 Fig. 8 is a sectional view of another embodiment of the valve seat according to the present application;

[0013] Figure 6 Fig. 9 is a structural schematic view of another embodiment of the valve device according to the present application; Figure 1 Fig. 10 is a structural schematic view of another embodiment of the valve device according to the present application;

[0014] Figure 7 Fig. 11 is a sectional view of the valve seat according to an embodiment of the present application.

[0015] Figure 8 Fig. 12 is a sectional view of the valve seat according to another embodiment of the present application. Figure 7

[0016] Figures 1-8 The reference signs in the drawings are explained as follows:

[0017] 1 guide sleeve, 11 first step surface, 12 annular cutout;

[0018] 2 valve seat, 21 mounting hole, 211 second step surface, 22 outer end surface, 23 chamfer;

[0019] 3 weld groove;

[0020] 4 open passage;

[0021] 5 connecting pipe. DETAILED DESCRIPTION

[0022] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0023] The words "first", "second", and the like used herein merely mean to facilitate the description of the structure and / or function of two or more structures or components that are the same or similar, and do not represent any special limitation on the order and / or importance.

[0024] Embodiment one

[0025] Please refer to Figures 1-6 , Figure 1 ​This is a schematic diagram of a specific embodiment of the valve device provided by the present invention. Figure 2 for Figure 1 A schematic diagram of a specific embodiment of the guide sleeve. Figure 3 for Figure 2 Cross-sectional view, Figure 4 for Figure 1 A schematic diagram of another specific embodiment of the guide sleeve. Figure 5 for Figure 1 A cross-sectional view of one specific embodiment of the valve seat. Figure 6 for Figure 1 A cross-sectional view of another specific embodiment of the valve seat.

[0026] like Figures 1-3 As shown, the present invention provides a valve device, including a guide sleeve 1 and a valve seat 2. The valve seat 2 is provided with a mounting hole 21. The outer wall surface of the guide sleeve 1 is formed with a first stepped surface 11. In the assembled state, the guide sleeve 1 is partially inserted into the mounting hole 21. The first stepped surface 11 abuts against the outer end face 22 of the valve seat 2. A weld groove 3 is formed between the portion of the guide sleeve 1 and the portion of the mounting hole 21 whose diameters are compatible. The guide sleeve 1 and / or the valve seat 2 are formed with an opening channel 4. The opening channel 4 is connected to the weld groove 3.

[0027] The part where the apertures match is the part where the radial dimensions of the guide sleeve 1 and the mounting hole 21 are basically the same. In the plugged-in state, the outer wall of the guide sleeve 1 and the inner wall of the mounting hole 21 can fit together or cooperate with a relatively small gap.

[0028] With the above structure, a weld groove 3 is formed between the guide sleeve 1 and the mounting hole 21, and the guide sleeve 1 and / or the valve seat 2 form an open channel 4. During welding, the solder inside the valve seat 2 can flow along the weld groove 3. When the solder overflows through the open channel 4, it indicates that the welding is finished, and the operator can relatively intuitively judge the welding endpoint. When the solder overflows from the open channel 4, it also indicates that the solder has been effectively filled in the entire axial range of the part of the guide sleeve 1 and the mounting hole 21 that are matched in diameter. It also makes it easier for the operator to quickly confirm the effectiveness of the weld quality.

[0029] The mating fit between the first step surface 11 and the outer end surface 22 can optimize the coaxiality of the assembly.

[0030] like Figure 2 As shown, the weld groove 3 can be provided on the outer wall surface of the guide sleeve 1; or, as shown... Figure 6 As shown, the weld groove 3 can also be provided on the inner wall of the mounting hole 21; or, the weld groove 3 can also exist on both the outer wall of the guide sleeve 1 and the inner wall of the mounting hole 21.

[0031] Similarly, as Figure 4As shown, the opening channel 4 can be located on the first step surface 11; or, as... Figure 6 As shown, the opening channel 4 can also be provided on the outer end face 22 of the valve seat 2; or, the opening channel 4 can exist simultaneously on the first step surface 11 and the outer end face 22.

[0032] It should be noted that the embodiments of the present invention do not limit the shape of the weld groove 3 and the opening channel 4. In implementation, those skilled in the art can set them according to specific needs, as long as the requirements for use are met. In the embodiments shown in the accompanying drawings, as... Figure 2 As shown, the weld groove 3 can be straight, or, as... Figure 6 As shown, the weld groove 3 can also be spiral-shaped.

[0033] Furthermore, such as Figure 3 and Figure 5 As shown, a first corner position can be formed between the outer wall surface of the guide sleeve 1 and the first step surface 11, and a second corner position can be formed between the inner wall of the mounting hole 21 and the outer end face 22. The first corner position and the second corner position are set opposite to each other, and an annular groove is formed between them. The weld groove 3 can be connected to the opening channel 4 through the annular groove.

[0034] With this configuration, the opening channel 4 does not need to be directly connected to the weld groove 3. When assembling the guide sleeve 1, there is no need to deliberately maintain the installation direction of the guide sleeve 1, making the installation of the guide sleeve 1 simpler. Furthermore, a ring of solder filling area can be formed between the first corner position and the second corner position, which is also of positive significance for ensuring the reliability of welding.

[0035] It is understandable that the aforementioned annular groove may not exist. In this case, it is necessary to control the installation direction of the guide sleeve 1 so that the opening channel 4 can be directly connected to the weld groove 3.

[0036] The annular groove 3 described above can be formed by setting an annular cut 12 extending radially inward at the first corner position; or, the annular groove 3 described above can also be formed by setting a chamfer 23 at the second corner position; or, the annular cut 12 and the chamfer 23 described above can coexist to jointly form the annular groove 3 described above.

[0037] Please continue to refer to this. Figure 1 The valve device also includes two connecting pipes 5 connected to the valve seat 2 for fluid inflow and outflow.

[0038] Example 2

[0039] Please refer to Figures 7-8 , Figure 7 This is a schematic diagram of another specific embodiment of the valve device provided by the present invention. Figure 8 forFigure 7 Structure diagram of one specific embodiment of the valve seat.

[0040] As Figure 7 , Figure 8 shown, the application also provides a valve device, comprising a guide sleeve 1 and a valve seat 2, the valve seat 2 is provided with a mounting hole 21; the inner hole wall of the mounting hole 21 can be formed with a second step surface 211, in the assembled state, part of the guide sleeve 1 is located in the mounting hole 21 and abuts against the second step surface 211, a welding groove 3 is formed between the part of the guide sleeve 1 and the mounting hole 21 which are matched in diameter, and the outlet of the welding groove 3 is exposed.

[0041] Different from the first embodiment, in this embodiment, the guide sleeve 1 does not abut against the outer end surface 22 of the valve seat 2 in the axial direction, but abuts against the second step surface 211 formed by the inner hole wall of the mounting hole 21 in the axial direction, thereby ensuring the axial insertion position of the guide sleeve 1 relative to the valve seat 2 and the coaxiality of the two.

[0042] In this embodiment, the outlet of the welding groove 3 can be exposed, and when welding, the welding material inside the valve seat 2 can flow along the welding groove 3, and when the welding material overflows from the outlet of the welding groove 3, it indicates that the welding is completed, and the worker can relatively intuitively judge the end point of the welding; and when the welding material overflows from the outlet of the welding groove 3, it also indicates that the welding material has been effectively filled in the entire axial range of the part where the guide sleeve 1 and the mounting hole 21 are matched in diameter, and it is also convenient for the worker to quickly confirm the effectiveness of the welding quality.

[0043] The installation position and the structural shape of the welding groove 3 are limited as described in the first embodiment, and will not be repeated here.

[0044] Further, the inner hole wall of the mounting hole 21 and the outer end surface 22 can form a second corner position, and an annular groove can be formed between the second corner position and the outer wall surface of the guide sleeve 1, the annular groove is connected with the welding groove 3, so as to form a circle of welding material filling area at the second corner position, thereby more effectively ensuring the reliability of the welding.

[0045] The above is only the preferred embodiment of the application, and it should be pointed out that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A valve device comprising a guide sleeve (1) and a valve seat (2) provided with a mounting hole (21), characterized in that, The inner hole wall of the mounting hole (21) is formed with a second step surface (211), part of the guide sleeve (1) is located in the mounting hole (21) and abuts against the second step surface (211), a welding groove (3) is formed between the part of the guide sleeve (1) and the part of the mounting hole (21) with matched inner diameters, and the outlet of the welding groove (3) is exposed.

2. The valve device of claim 1, wherein The welding groove (3) is linear or helical.

3. The valve apparatus of claim 1, wherein A second corner position is formed between the inner hole wall of the mounting hole (21) and the outer end surface (22), an annular groove is formed between the second corner position and the outer wall surface of the guide sleeve (1), and the annular groove is communicated with the welding groove (3).

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