A valve device

Abstract

The application discloses a valve device, comprising 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 is in abutment with 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 diameter matched with each other, the guide sleeve and / or the valve seat is formed with an open channel, the open channel is communicated with the welding groove. By using the above structure, when welding, the welding material located in the valve seat can flow along the welding groove, when the welding material overflows through the open channel, it indicates that the welding is finished, the welding end point can be judged intuitively; when the welding material overflows from the open channel, it also indicates that the welding material is effectively filled between the guide sleeve and the valve seat, the effectiveness of the welding quality can be confirmed quickly.

Description

Technical Field

[0001] This invention relates to the field of refrigeration control technology, and more specifically to a valve device. Background Technology

[0002] Valve devices, such as electronic expansion valves, generally include a guide sleeve and a valve seat. The valve seat has a mounting hole. In the assembled state, the guide sleeve is inserted into the mounting hole, and the guide sleeve and valve seat are fixed together by welding. After the guide sleeve and valve seat are welded, it is not easy to visually inspect the welding quality from the outside. Summary of the Invention

[0003] The purpose of this invention is to provide a valve device in which the welding endpoint and welding quality of the guide sleeve and valve seat can be intuitively judged.

[0004] To solve the above-mentioned technical problems, the present invention provides a valve device, including a guide sleeve and a valve seat, wherein the valve seat is provided with a mounting hole; the guide sleeve is formed with a first stepped surface, a portion of the guide sleeve is located in the mounting hole, the first stepped surface abuts against the outer end face of the valve seat, a weld groove is formed between the portion of the guide sleeve and the mounting hole whose diameters are adapted to each other, and the guide sleeve and / or the valve seat are formed with an open channel, the open channel being connected to the weld groove.

[0005] With the above structure, a weld groove is formed between the guide sleeve and the mounting hole, and the guide sleeve and / or valve seat form an open channel. During welding, the solder inside the valve seat can flow along the weld groove. When the solder overflows through the open channel, 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, it also indicates that the solder has been effectively filled in the entire axial range of the part of the guide sleeve and the mounting hole that are matched in diameter. It also makes it easy for the operator to quickly confirm the effectiveness of the weld quality.

[0006] The present invention also provides a valve device, including a guide sleeve and a valve seat, wherein the valve seat is provided with a mounting hole; the inner wall of the mounting hole is formed with a second stepped surface, a portion of the guide sleeve is located in the mounting hole and abuts against the second stepped surface, a weld groove is formed between the portion of the guide sleeve and the portion of the mounting hole whose inner diameters are adapted to each other, and the outlet of the weld groove is exposed. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of a specific embodiment of the valve device provided by the present invention;

[0008] Figure 2 for Figure 1 A schematic diagram of a specific embodiment of the guide sleeve;

[0009] Figure 3 for Figure 2Cross-sectional view;

[0010] Figure 4 for Figure 1 A schematic diagram of another specific embodiment of the guide sleeve;

[0011] Figure 5 for Figure 1 A cross-sectional view of one specific embodiment of the valve seat;

[0012] Figure 6 for Figure 1 A cross-sectional view of another specific embodiment of the valve seat;

[0013] Figure 7 A schematic diagram of another specific embodiment of the valve device provided by the present invention;

[0014] Figure 8 for Figure 7 A cross-sectional view of one specific embodiment of the valve seat.

[0015] Figures 1-8 The annotations in the accompanying drawings are explained as follows:

[0016] 1. Guide sleeve; 11. First step surface; 12. Circular cut;

[0017] 2. Valve seat; 21. Mounting hole; 211. Second step surface; 22. Outer end face; 23. Chamfer;

[0018] 3. Weld groove;

[0019] 4-opening channel;

[0020] 5. Takeover. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The terms "first" and "second" used in this article are used only for the convenience of describing two or more structures or components that are identical or similar in structure and / or function, and do not indicate any special limitation on order and / or importance.

[0023] Example 1

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] The mating fit between the first step surface 11 and the outer end surface 22 can optimize the coaxiality of the assembly.

[0029] 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.

[0030] Similarly, as Figure 4 As 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Example 2

[0038] 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 for Figure 7 A schematic diagram of a specific embodiment of the valve seat.

[0039] like Figure 7 , Figure 8As shown, the present invention also 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 inner wall of the mounting hole 21 may be formed with a second stepped surface 211. In the assembled state, part of the guide sleeve 1 is located in the mounting hole 21 and abuts against the second stepped surface 211. A weld groove 3 is formed between the parts of the guide sleeve 1 and the mounting hole 21 whose inner diameters are compatible. The outlet of the weld groove 3 is exposed.

[0040] Unlike Embodiment 1, in this embodiment, the guide sleeve 1 does not abut against the outer end face 22 of the valve seat 2 along the axial direction, but abuts against the second step surface 211 formed by the inner wall of the mounting hole 21 along 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.

[0041] In this embodiment, the outlet of the weld groove 3 can be exposed. During welding, the solder inside the valve seat 2 can flow along the weld groove 3. When the solder overflows from the outlet of the weld groove 3, it indicates that the welding is finished. The operator can judge the welding endpoint relatively intuitively. When the solder overflows from the outlet of the weld groove 3, it also indicates that the solder has been effectively filled in the entire axial range of the portion where the diameters of the guide sleeve 1 and the mounting hole 21 are matched. This also makes it easier for the operator to quickly confirm the effectiveness of the weld quality.

[0042] The installation location and structural shape of the weld groove 3 are defined in Example 1 and will not be repeated here.

[0043] Furthermore, a second corner position can be formed between the inner wall of the mounting hole 21 and the outer end face 22. 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 to the weld groove 3 so as to form a ring of solder filling area at the second corner position, thereby more effectively ensuring the reliability of the welding.

[0044] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A valve device comprising a guide sleeve (1) and a valve seat (2), wherein the valve seat (2) is provided with a mounting hole (21), characterized in that, The guide sleeve (1) has a first stepped surface (11), and part of the guide sleeve (1) is located in the mounting hole (21). The first stepped surface (11) abuts against the outer end face (22) of the valve seat (2) to cover the mounting hole (21). A weld groove (3) is formed between the portion of the guide sleeve (1) and the mounting hole (21) whose diameters are matched. The guide sleeve (1) and / or the valve seat (2) have an opening channel (4), and the opening channel (4) is connected to the weld groove (3).

2. The valve device according to claim 1, characterized in that, The outer wall of the guide sleeve (1) forms a first corner position between the first step surface (11) and the inner wall of the mounting hole (21) forms a second corner position between the outer end face (22). The first corner position and the second corner position are arranged opposite to each other, and an annular groove is formed between them. The weld groove (3) is connected to the opening channel (4) through the annular groove.

3. The valve device according to claim 2, characterized in that, The outer wall surface of the guide sleeve (1) is provided with an annular cut (12) extending radially inward at the first corner position; or, The second corner position is provided with a chamfer (23).

4. The valve device according to any one of claims 1-3, characterized in that, The weld groove (3) is either straight or spiral.

5. The valve device according to claim 4, characterized in that, The weld groove (3) is provided on the outer wall of the guide sleeve (1) or the inner wall of the mounting hole (21).

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