A valve device and its manufacturing method

Abstract

This application provides a valve device and its manufacturing method. The valve device includes: a valve body, which includes a valve main body and a first pipe fitting, wherein a portion of the outer wall of the first pipe fitting is welded and fixed to the valve main body; a second pipe fitting, at least a portion of which is sleeved on the outer periphery of the first pipe fitting, wherein at least a portion of the inner wall of the second pipe fitting is welded and fixed to a portion of the outer wall of the first pipe fitting; and an interface portion having an interface channel, wherein at least a portion of the second pipe fitting is located in the interface channel, and the outer wall of the second pipe fitting and the inner wall of the interface channel are circumferentially sealed. In this application, at least a portion of the inner wall of the second pipe fitting and a portion of the outer wall of the first pipe fitting are welded and fixed, and the outer wall of the second pipe fitting and the inner wall of the interface channel are circumferentially sealed. During welding, the solder, such as a welding ring, can be located inside the second pipe fitting. The molten solder enters between the inner wall of the second pipe fitting and the outer wall of the first pipe fitting to achieve welding and fixing of the second pipe fitting and the first pipe fitting, reducing solder overflow and improving the sealing reliability of the second pipe fitting and the interface portion.

Description

Technical Field

[0001] This application relates to the field of automotive thermal management technology, specifically to a valve device and its manufacturing method. Background Technology

[0002] In the structure of the four-way valve of the related technology, the pipe fitting is inserted into the valve body, the outer wall of the pipe fitting is welded and fixed to the valve body, and a part of the pipe fitting protruding from the valve body is inserted into the interface channel of the interface part. The outer wall of the pipe fitting and the inner wall of the interface channel of the interface part are circumferentially sealed by a sealing element.

[0003] However, in related technologies, the molten solder from the welding of the pipe fittings and valve body in the four-way valve may contaminate the outer wall of the pipe fittings, causing the seal between the pipe fittings and the interface channels to fail, resulting in problems such as leakage. Summary of the Invention

[0004] The purpose of this application is to provide a valve device and a method for manufacturing the same, thereby improving the sealing reliability of pipe fittings and interface channels.

[0005] To solve the above-mentioned technical problems, this application provides a valve device, comprising:

[0006] The valve body includes a valve body and a first pipe fitting, the first pipe fitting including an outer wall, a portion of the outer wall being welded and fixed to the valve body;

[0007] The second pipe fitting, at least a portion of which is sleeved on the outer periphery of the first pipe fitting, includes an inner wall, and at least a portion of the inner wall of the second pipe fitting and a portion of the outer wall of the first pipe fitting are welded and fixed together.

[0008] The interface portion has an interface channel, at least a portion of the second pipe is located in the interface channel, and the outer wall of the second pipe and the inner wall of the interface channel are circumferentially sealed.

[0009] This application also provides a method for manufacturing a valve device, including:

[0010] Step S1: Place the welding ring inside the second fitting;

[0011] Step S2: Fit at least a portion of the second pipe fitting onto the outer periphery of the first pipe fitting;

[0012] Step S3: Perform welding operation to weld and fix at least a portion of the inner wall of the second pipe fitting to a portion of the outer wall of the first pipe fitting, and weld and fix a portion of the outer wall of the first pipe fitting to the valve body;

[0013] Step S4: Insert at least a portion of the second pipe fitting into the interface channel, so that the outer wall of the second pipe fitting and the inner wall of the interface channel are circumferentially sealed.

[0014] The technical effects of this application are as follows:

[0015] In the valve device of this application, at least a portion of the inner wall of the second pipe fitting and at least a portion of the outer wall of the first pipe fitting are welded and fixed. The outer wall of the second pipe fitting and the inner wall of the interface channel are circumferentially sealed. Thus, during welding, the solder, such as the solder ring, can be located inside the second pipe fitting. The molten solder enters between at least a portion of the inner wall of the second pipe fitting and a portion of the outer wall of the first pipe fitting to achieve welding and fixing of the second pipe fitting and the first pipe fitting. This reduces solder overflow, protects the sealing surface of the outer wall of the second pipe fitting from solder contamination, improves the sealing reliability of the second pipe fitting and the interface, and reduces the possibility of leakage. Attached Figure Description

[0016] Figure 1 A cross-sectional view of a specific embodiment of the valve device provided in this application;

[0017] Figure 2 for Figure 1 A partial sectional view of region A in the valve assembly;

[0018] Figure 3 for Figure 1 Layout diagram of the valve assembly;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure during welding;

[0020] Figure 5 for Figure 2 Another sectional view of the valve assembly during welding;

[0021] Figure 6 for Figure 1 A schematic diagram of the structure of the first pipe fitting in the valve assembly;

[0022] in, Figures 1-6 The accompanying figure labels are as follows:

[0023] 1-Valve body; 11-First pipe fitting; 11A-Outer wall; 111-Reducing diameter section; 112-Folding part; 12-Valve body; 12a-Interface hole;

[0024] 2-Second fitting; 21-Reduced diameter section; 2A-Inner wall;

[0025] 3-Interface section; 31-Interface channel; 31a-Annular groove;

[0026] 4-Sealing ring;

[0027] 5-Valve seat;

[0028] 6-Slider;

[0029] a-Guide groove; b-Annular groove;

[0030] 01-Welding ring. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figures 1-6 , Figure 1 A cross-sectional view of a specific embodiment of the valve device provided in this application; Figure 2 for Figure 1 A partial sectional view of region A in the valve assembly; Figure 3 for Figure 1 Layout diagram of the valve assembly; Figure 4 for Figure 2 A schematic diagram of the structure during welding; Figure 5 for Figure 2 Another sectional view of the valve assembly during welding; Figure 6 for Figure 1 A schematic diagram of the structure of the first pipe fitting in the valve device.

[0033] This embodiment provides a valve device, including:

[0034] Valve body 1, which includes valve body 12 and first pipe fitting 11. The first pipe fitting 11 includes an outer wall 11A, and a portion of the outer wall 11A is welded and fixed to the valve body 12.

[0035] The second pipe fitting 2, at least a portion of the second pipe fitting 2 is sleeved on the outer periphery of the first pipe fitting 11, the second pipe fitting 2 includes an inner wall 2A, and at least a portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11 are welded and fixed.

[0036] The interface part 3 has an interface channel 31, at least part of the second pipe 2 is located in the interface channel 31, and the outer wall of the second pipe 2 and the inner wall of the interface channel 31 are circumferentially sealed.

[0037] In this embodiment of the valve device, at least a portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11 are welded and fixed. The outer wall of the second pipe fitting 2 and the inner wall of the interface channel 31 are circumferentially sealed. Thus, during welding, the solder, such as the welding ring 01, can be placed inside the second pipe fitting 2. The molten solder enters between at least a portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11 to achieve welding and fixing of the second pipe fitting 2 and the first pipe fitting 11. This reduces solder overflow, protects the sealing surface of the outer wall of the second pipe fitting 2 from solder contamination, improves the sealing reliability of the second pipe fitting 2 and the interface 3, and reduces the possibility of leakage.

[0038] Furthermore, in this embodiment, a portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11 are interference-fitted, and another portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11 are welded and fixed.

[0039] Thus, before welding the second pipe fitting 2 and the first pipe fitting 11, the second pipe fitting 2 and the first pipe fitting 11 can be pre-positioned through interference fit, ensuring that the connection between the second pipe fitting 2 and the first pipe fitting 11 is reliable, preventing the second pipe fitting 2 and the first pipe fitting 11 from shaking or even separating from each other due to external force during the welding operation, thereby improving the yield of the valve device.

[0040] In practice, it is necessary to design the interference fit of part of the inner wall 2A of the second pipe fitting 2 and part of the outer wall 11A of the first pipe fitting 11, so that the second pipe fitting 2 and the first pipe fitting 11 can achieve pre-positioning through interference fit, and ensure that the second pipe fitting 2 and the first pipe fitting 11 can be assembled smoothly.

[0041] like Figure 2 and Figure 3 As shown, in this embodiment, the outer wall 11A of the first pipe fitting 11 has a plurality of guide grooves a, the guide grooves a extend along the axial direction of the first pipe fitting 11, the plurality of guide grooves a are arranged at intervals along the circumferential direction of the first pipe fitting 11, the solder at least partially fills the inside of the guide grooves a, and the solder connects the second pipe fitting 2 and the first pipe fitting 11.

[0042] Thus, in this embodiment, the guide groove a can accommodate the molten solder and guide its flow, ensuring that the molten solder can only flow along the extension direction of the guide groove a, thereby achieving the welding and fixing of the second pipe 2 and the first pipe 11; the outer wall 11A of the first pipe 11 and the inner wall of the second pipe 2 are interference-fitted, achieving the pre-positioning of the second pipe 2 and the first pipe 11 before the welding operation, thereby achieving the relative fixing of the second pipe 2 and the first pipe 11.

[0043] In this embodiment, the outer wall 11A of the first pipe fitting 11 is provided with a plurality of guide grooves a. In practice, the number of guide grooves a provided on the outer wall 11A of the first pipe fitting 11 is not limited, and at least one guide groove a can be provided on the outer wall of the first pipe fitting 11.

[0044] In this embodiment, the guide groove a is disposed on the outer wall 11A of the first pipe fitting 11. In other embodiments of this application, the guide groove a may also be disposed on the inner wall 2A of the second pipe fitting 2, the guide groove a extends along the axial direction of the second pipe fitting 2, and multiple guide grooves a are spaced apart along the circumferential direction of the second pipe fitting 2.

[0045] It is understood that in order to achieve an interference fit between a portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11, another portion of the inner wall 2A of the second pipe fitting 2 and a portion of the outer wall 11A of the first pipe fitting 11 are welded and fixed. The first pipe fitting 11 can also have other configurations. In some other embodiments of this application, the outer wall 11A of the first pipe fitting 11 is a prism, such as a nine-sided prism or a thirteen-sided prism. The side edge of the prism is interference-fitted with the inner wall 2A of the second pipe fitting 2. The side surface of the prism and the inner wall 2A of the second pipe fitting 2 have a gap. The molten solder fills the gap between the side surface of the prism and the inner wall 2A of the second pipe fitting 2, thereby achieving the welding and fixing of the second pipe fitting 2 and the first pipe fitting 11.

[0046] Please continue to refer to this. Figures 1-3 In this embodiment, the end of the first pipe fitting 11 near the free end includes a variable diameter section 111. The outer diameter of the variable diameter section 111 gradually decreases in the direction near the free end. An annular groove b is formed between the outer wall of the variable diameter section 111 and the inner wall 2A of the second pipe fitting 2. The guide groove a and the annular groove b are connected. The solder portion is filled inside the annular groove b and connects the second pipe fitting 2 and the first pipe fitting 11.

[0047] The above-mentioned deformed section 111 is designed in two ways. Firstly, it makes it easier to insert the free end of the first pipe fitting 11 into the interior of the second pipe fitting 2, improving the ease of operation when the second pipe fitting 2 is fitted with the first pipe fitting 11. Secondly, during welding, the molten solder will first enter the interior of the annular groove b, and then be diverted into the interior of each guide groove a, reducing the overflow of the molten solder and improving the welding reliability of the second pipe fitting 2 and the first pipe fitting 11.

[0048] Please continue to refer to this. Figure 1 In this embodiment, the valve device also includes a sealing ring 4, which is sleeved on the outer periphery of the second pipe fitting 2. The outer side of the sealing ring 4 abuts against the inner wall of the interface channel 31, and the inner side of the sealing ring 4 abuts against the outer wall of the second pipe fitting 2. The outer wall of the second pipe fitting 2 and the inner wall of the interface channel 31 are circumferentially sealed by the sealing ring 4, ensuring reliable sealing between the second pipe fitting 2 and the interface channel 31 and avoiding leakage problems.

[0049] like Figure 1 As shown, the inner wall of the interface channel 31 has an annular groove 31a, and the sealing ring 4 is located in the annular groove 31a. In this way, the annular groove 31a can limit the sealing ring 4 and ensure that the installation position of the sealing ring 4 is reliable.

[0050] In practice, there are no restrictions on the material of the sealing ring 4. The material of the sealing ring 4 includes, but is not limited to, rubber, polytetrafluoroethylene, etc.

[0051] In this embodiment, the inner wall of the interface channel 31 has an annular groove 31a and the number of sealing rings 4 is one. In practice, the number of annular grooves 31a and sealing rings 4 is not limited. The number of annular grooves 31a and sealing rings 4 can be at least one. The sealing rings 4 are located in the annular grooves 31a in a one-to-one correspondence.

[0052] Please continue to refer to this. Figure 1 In this embodiment, the end of the second pipe 2 away from the valve body 1 includes a reduced diameter portion 21, and the outer diameter of the reduced diameter portion 21 gradually decreases along the direction away from the valve body 1.

[0053] The reduced diameter section 21, as described above, makes it easier to insert the end of the second pipe fitting 2 away from the valve body 1 into the interface channel 31, improving the ease of installation of the interface section 3. On the other hand, it can reduce the wear of the sealing ring 4 during the installation of the interface section 3, ensuring that the sealing ring 4 can reliably perform the circumferential sealing function, and improving the sealing reliability of the second pipe fitting 2 and the interface channel 31.

[0054] Please continue to refer to this. Figures 1-3 In this embodiment, the valve body 12 has an interface hole 12a, and the first pipe 11 has an outwardly folded portion 112 at one end near the valve body 12. The first pipe 11 partially passes through the interface hole 12a, and the inner wall of the interface hole 12a and the opposite outer wall of the first pipe 11 are welded and fixed. The valve body 12 includes an inner cavity, and the folded portion 112 and the inner wall forming the inner cavity are welded and fixed.

[0055] In this embodiment, the valve body 1 adopts a separate structure of valve body 12 and first pipe fitting 11. The valve body 12 and first pipe fitting 11 can be processed and formed separately, reducing the processing difficulty of valve body 1 and improving the processing efficiency of valve body 1. After the valve body 12 and first pipe fitting 11 are processed and formed separately, the first pipe fitting 11 can pass through the interface hole 12a from the inside to the outside. The folded part 112 plays a limiting role to prevent the valve body 12 and the first pipe fitting 11 from separating. Then, the welding ring 01 is placed in the second pipe fitting 2, and at least part of the second pipe fitting 2 is fitted around the outer periphery of the first pipe fitting 11. The end of the second pipe fitting 2 near the valve body 12 abuts against the outer wall of the valve body 12. Part of the inner wall 2A of the second pipe fitting 2 and part of the outer wall 11A of the first pipe fitting 11 are press-fitted, thereby realizing the relative fixation of valve body 12, first pipe fitting 11 and second pipe fitting 2. Then, welding operations are performed on the valve body 12, the first pipe fitting 11, and the second pipe fitting 2. Part of the molten solder enters between the folded part 112 and the inner wall of the valve body 12 to achieve welding and fixation between the folded part 112 and the inner wall of the valve body 12. Part of the solder enters between the inner wall of the interface hole 12a and the relative outer wall 11A of the first pipe fitting 11 to achieve welding and fixation between the inner wall of the interface hole 12a and the relative outer wall 11A of the first pipe fitting 11. Part of the solder enters between the end wall of the second pipe fitting 2 near the valve body 12 and the outer wall of the valve body 12 to achieve welding and fixation between the end wall of the second pipe fitting 2 near the valve body 12 and the outer wall of the valve body 12. Part of the solder enters between the inner wall 2A of the second pipe fitting 2 and the outer wall 11A of the first pipe fitting 11 to achieve welding and fixation between the inner wall 2A of the second pipe fitting 2 and the outer wall 11A of the first pipe fitting 11.

[0056] Therefore, it can be seen that the valve device in this embodiment can simultaneously achieve the welding and fixing of the valve body 12, the first pipe fitting 11 and the second pipe fitting 2, thereby improving welding efficiency.

[0057] Please continue to refer to this. Figure 1 In this embodiment, the valve device also includes a valve seat 5 and a slider 6 disposed inside the valve body 1. The valve seat 5 is provided with E, S, and C interfaces that communicate with the inner cavity. The bottom surface of the slider 6 is pressed and fitted against the valve seat 5. The slider 6 can slide along the valve seat 5 to realize the switching of the working state of the valve device.

[0058] This embodiment also provides a method for manufacturing a valve device, including:

[0059] Step S1: Place the welding ring 01 inside the second pipe fitting 2;

[0060] Step S2: Fit at least part of the second pipe fitting 2 onto the outer periphery of the first pipe fitting 11;

[0061] Step S3: Perform welding operation to weld and fix at least part of the inner wall of the second pipe fitting 2 to part of the outer wall of the first pipe fitting 11, and weld and fix part of the outer wall of the first pipe fitting 11 to the valve body 12.

[0062] Step S4: Insert at least part of the second pipe fitting 2 into the interface channel 31, so that the outer wall of the second pipe fitting 2 and the inner wall of the interface channel 31 are circumferentially sealed.

[0063] The manufacturing method of the valve device in this embodiment is applicable to the aforementioned valve device, and therefore has the same technical effect as the aforementioned valve device, which will not be repeated here.

[0064] Furthermore, the manufacturing method of the valve device in this embodiment further includes, before step S1:

[0065] Step S01: Separately process and form the valve body 12 and the first pipe 11, and pass the first pipe 11 from the inside to the outside through the interface hole 12a until the folded part 112 of the first pipe 11 abuts against the inner wall of the valve body 12.

[0066] Step S3 also includes:

[0067] After melting, part of the solder enters between the folded part 112 and the inner wall of the valve body 12 to weld and fix the folded part 112 and the inner wall of the valve body 12; part of the solder enters between the inner wall of the interface hole 12a and the relative outer wall of the first pipe 11 to weld and fix the inner wall of the interface hole 12a and the relative outer wall of the first pipe 11; and part of the solder enters between the end wall of the second pipe 2 near the valve body 12 and the outer wall of the valve body 12 to weld and fix the end wall of the second pipe 2 near the valve body 12 and the outer wall of the valve body 12.

[0068] As set above, in this embodiment, the valve body 1 adopts a split structure of valve body 12 and first pipe fitting 11. Valve body 12 and first pipe fitting 11 can be processed and formed separately, reducing the processing difficulty of valve body 1 and improving the processing efficiency of valve body 1; at the same time, the valve body 12, first pipe fitting 11 and second pipe fitting 2 are welded and fixed, effectively improving the welding efficiency.

[0069] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A valve device, characterized in that, include: The valve body (1) includes a valve body (12) and a first pipe fitting (11). The first pipe fitting (11) includes an outer wall (11A), a portion of which is welded and fixed to the valve body (12). The second pipe fitting (2) is at least partially sleeved on the outer periphery of the first pipe fitting (11). The second pipe fitting (2) includes an inner wall (2A). At least a portion of the inner wall (2A) of the second pipe fitting (2) and a portion of the outer wall (11A) of the first pipe fitting (11) are welded together. The interface part (3) has an interface channel (31), at least part of the second pipe (2) is located in the interface channel (31), and the outer wall of the second pipe (2) and the inner wall of the interface channel (31) are circumferentially sealed.

2. The valve device according to claim 1, characterized in that, A portion of the inner wall (2A) of the second pipe fitting (2) and a portion of the outer wall (11A) of the first pipe fitting (11) are interference-fitted, and another portion of the inner wall (2A) of the second pipe fitting (2) and a portion of the outer wall (11A) of the first pipe fitting (11) are welded together.

3. The valve device according to claim 1, characterized in that, The inner wall (2A) of the second pipe fitting (2) or the outer wall (11A) of the first pipe fitting (11) has one or more guide grooves (a) that extend axially along the second pipe fitting (2) or the first pipe fitting (11), and a plurality of guide grooves (a) are spaced apart circumferentially along the second pipe fitting (2) or the first pipe fitting (11), and solder at least partially fills the guide grooves (a), the solder connecting the second pipe fitting (2) and the first pipe fitting (11).

4. The valve device according to claim 3, characterized in that, The first pipe fitting (11) includes a reducing section (111) near its free end. The outer diameter of the reducing section (111) gradually decreases in the direction near the free end. An annular groove (b) is formed between the outer wall of the reducing section (111) and the inner wall (2A) of the second pipe fitting (2). The guide groove (a) and the annular groove (b) are connected. The solder portion fills the interior of the annular groove (b) and connects the second pipe fitting (2) and the first pipe fitting (11).

5. The valve device according to any one of claims 1-4, characterized in that, The valve device further includes a sealing ring (4), which is sleeved on the outer periphery of the second pipe fitting (2). The outer side of the sealing ring (4) abuts against the inner wall of the interface channel (31), and the inner side of the sealing ring (4) abuts against the outer wall of the second pipe fitting (2). The outer wall of the second pipe fitting (2) and the inner wall of the interface channel (31) are circumferentially sealed by the sealing ring (4).

6. The valve device according to claim 5, characterized in that, The inner wall forming the interface channel (31) has an annular groove (31a), and the sealing ring (4) is located in the annular groove (31a).

7. The valve device according to any one of claims 1-4, characterized in that, The second pipe fitting (2) has a reduced diameter section (21) at one end away from the valve body (1), and the outer diameter of the reduced diameter section (21) gradually decreases in the direction away from the valve body (1).

8. The valve device according to any one of claims 1-4, characterized in that, The valve body (12) has an interface hole (12a). The first pipe (11) has an outwardly folded portion (112) at one end near the valve body (12). The first pipe (11) partially passes through the interface hole (12a). The inner wall of the interface hole (12a) and the opposite outer wall of the first pipe (11) are welded and fixed. The valve body (12) includes an inner cavity. The folded portion (112) and the inner wall forming the inner cavity are welded and fixed.

9. A method for manufacturing a valve device, characterized in that, include: Step S1: Place the welding ring (01) inside the second fitting (2); Step S2: Fit at least part of the second pipe fitting (2) onto the outer periphery of the first pipe fitting (11); Step S3: Perform welding operation to weld and fix at least part of the inner wall (2A) of the second pipe fitting (2) and part of the outer wall (11A) of the first pipe fitting (11), and weld and fix part of the outer wall (11A) of the first pipe fitting (11) to the valve body (12); Step S4: Insert at least a portion of the second pipe fitting (2) into the interface channel (31) so that the outer wall of the second pipe fitting (2) and the inner wall of the interface channel (31) are circumferentially sealed.

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