Valve device

Abstract

This utility model provides a valve device comprising a valve body, a valve connecting pipe, and a welded component. The valve body has an insertion port, and the valve connecting pipe includes an insertion section and an external section. The insertion section extends into the insertion port, and the external section is located outside the insertion port and includes a supporting portion. A gap is formed between the supporting portion and the insertion port, and solder is contained within the gap, which welds the external section to the valve body in a fixed manner. When the insertion section has extended into the insertion port but the external section has not yet been welded to the valve body, the welded component used to form the solder is secured within the gap and is not easily displaced. Therefore, the molten solder formed after the welded component is heated can flow into the gap more quickly and accurately, preventing the molten solder from overflowing due to displacement of the welded component. This ensures that a sufficient amount of molten solder remains in the gap so that after cooling and solidification, the molten solder can reliably weld the external section to the valve body, overcoming the problem of poor welding quality between the external section and the valve body due to solder loss.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to a valve device. Background Technology

[0002] Valve devices, exemplified by four-way valves, consist of a valve body and several fittings located within it. The welding quality between the valve body and fittings is crucial to the performance and durability of the valve device. Because the solder between the valve body and fittings is prone to overflow and loss under high-temperature molten conditions, existing valve devices suffer from poor welding quality, making it difficult to form strong welds. This results in poor durability of the valve device, and increasing the amount of solder used can lead to excess solder contaminating the valve body and fittings. Utility Model Content

[0003] In view of this, the present invention provides a valve device with high welding quality, which is therefore robust and durable.

[0004] The valve device of this utility model includes a valve body, a valve connecting pipe, and a welded component. The valve body is provided with an insertion port. The valve connecting pipe includes an insertion section and an external section. The insertion section extends into the insertion port, and the external section is located outside the insertion port and includes a supporting part. A gap is formed between the supporting part and the insertion port. Solder is present in the gap, and the solder welds and fixes the external section to the valve body.

[0005] The beneficial effects of the valve device of this utility model are as follows: when the insertion section has been inserted into the insertion port and the external section has not yet been welded to the valve body, the welding parts used to form the solder are fixed in the gap and are not easy to shift or misalign. As a result, the molten solder formed after the welding parts are heated can flow into the gap more quickly and accurately, preventing the molten solder from overflowing and being lost due to the shift or misalignment of the welding parts. This ensures that there is a sufficient amount of molten solder remaining in the gap so that the external section can be firmly and reliably welded to the valve body after the molten solder cools and solidifies. This overcomes the problem of poor welding quality between the external section and the valve body due to the loss of molten solder. A stable and reliable connection between the valve body and the valve pipe can be achieved without increasing the amount of solder used.

[0006] In some embodiments, the valve body includes an insertion platform with an insertion port, the insertion platform being fixedly fitted with the insertion section, and a gap being formed between the end of the insertion platform and the supporting portion.

[0007] In some embodiments, the external segment includes a variable diameter segment located outside the insertion port, the outer diameter of the variable diameter segment increasing in a direction away from the insertion segment, and the abutment portion including the outer side wall of the variable diameter segment.

[0008] In some implementations, the variable diameter section is a conical section with a cone angle of 30° to 90°.

[0009] In some embodiments, the external section also includes an external straight pipe section for mounting the welding component, with an insertion section and a supporting part connected to both ends of the external straight pipe section.

[0010] In some implementations, the outer diameter of the external straight pipe section is equal to or smaller than the outer diameter of the inserted section.

[0011] In some implementations, the end of the insertion section that is relatively far from the external section does not protrude from the inner wall of the valve body.

[0012] In some embodiments, the valve connection pipe includes a transition pipe and a connecting pipe, the transition pipe including the insertion section and the external section, and the connecting pipe docking or plugging into the external section.

[0013] In some embodiments, the connector includes an assembly section that connects to the external section, and the inner diameter of the insertion section is the minimum inner diameter of the transition tube and is greater than or equal to the inner diameter of the assembly section.

[0014] In some implementations, the insertion segment and the external segment are formed by a continuous tubular element.

[0015] In some embodiments, the external segment includes a flared segment that is fitted onto and welded to the assembly segment.

[0016] In some embodiments, the external section further includes a variable diameter section disposed between the flared section and the insertion section, the inner diameter of the variable diameter section decreasing in a direction away from the flared section, and the inner sidewall of the variable diameter section abutting against the assembly section.

[0017] In some embodiments, the valve device is a four-way valve, the connecting pipe is an inlet pipe, and the valve device also includes a first outlet pipe, a second outlet pipe and a third outlet pipe located on the side of the valve body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the valve device according to one embodiment of the present invention.

[0019] Figure 2 A schematic diagram of the valve body structure of a valve device according to one embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the transition pipe structure of a valve device according to one embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the transition pipe of a valve device according to one embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the connecting pipe structure of a valve device according to one embodiment of the present invention;

[0023] Figure 6 for Figure 1 The diagram shows a partially enlarged view of the valve assembly before the external section and valve body are welded together.

[0024] Figure 7 for Figure 6 The diagram shown is a schematic of the valve assembly after the welded parts have been removed.

[0025] Explanation of reference numerals in the attached drawings: 100, four-way valve; 10, valve body; 11, valve cavity; 12, insertion platform; 13, insertion port; 20, transition tube; 21, insertion section; 22, external section; 221, flared section; 222, reducing section; 223, external straight pipe section; 30, connecting pipe; 31, assembly section; 40, solder; 41, welded component; 42, gap; 50, first outlet pipe; 60, second outlet pipe; 70, third outlet pipe. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] This utility model provides a valve device, which can be a four-way valve 100 or other types of valves. Figure 1 The illustrated valve device is a four-way valve 100, which includes a valve body 10, a valve inlet pipe, a first outlet pipe 50, a second outlet pipe 60, and a third outlet pipe 70, as shown. Figure 2 As shown, the valve body 10 is a hollow tubular structure; the valve connecting pipe includes a connecting pipe 30, such as... Figure 5 As shown, the connecting pipe 30 includes an assembly section 31 for connecting to the side of the valve body 10. See again... Figure 1 The connector 30 serves as the inlet pipe, and the liquid in the connector 30 flows into the valve cavity 11 of the valve body 10 in the direction indicated by arrow V1. The first outlet pipe 50, the second outlet pipe 60, and the third outlet pipe 70 are arranged side by side on the side of the valve body 10, and the three are located on opposite sides of the connector 30. The liquid forms three streams through the valve block (not shown) in the valve cavity 11, and the three streams flow into the first outlet pipe 50, the second outlet pipe 60, and the third outlet pipe 70 in the directions indicated by arrows V2, V3, and V4, respectively.

[0029] See Figure 2 And see also Figures 3-4 , Figure 6 To facilitate easier assembly and connection of the valve body 10 and the connecting pipe 30, the valve connecting pipe also includes a transition pipe 20. The transition pipe 20 includes an external section 22 and an insertion section 21 arranged axially. The external section 22 is located outside the insertion port 13 and connects to the assembly section 31 of the connecting pipe 30. The valve body 10 has an insertion port 13 on its side that communicates with the valve cavity 11. The insertion section 21 extends into the insertion port 13. The external section 22 includes a supporting portion, and a support portion forms a gap with the insertion port 13. Figure 7 The gap 42 shown contains solder 40, which welds and fixes the valve body 10 to the external section 22.

[0030] When the insertion section 21 has been inserted into the insertion port 13 and the valve body 10 and the external section 22 have not yet been welded, the valve device is also equipped with a welding part 41 for forming solder 40. The welding part 41 is fixed in the gap 42 and is difficult to shift or misalign. As a result, the molten solder formed by the welding part 41 after being heated can flow and diffuse into the gap 42 more quickly and accurately. There will be no overflow of molten solder from the gap 42 and loss due to the offset of the welding part 41 relative to the valve device. This ensures that a sufficient amount of molten solder can be retained in the gap 42 so that the weld point or weld formed after the molten solder cools and solidifies can firmly weld the external section 22 to the valve body 10. At the same time, it solves the problem of the valve body 10 and the valve pipe being contaminated by the overflow of molten solder. Therefore, the valve device of this utility model overcomes the problem of poor welding quality between the external section 22 and the valve body 10 due to the loss of molten solder. It can achieve a stable and reliable connection between the valve body 10 and the valve connecting pipe without increasing the amount of solder used, and avoids the contamination of the valve body 10 and the valve connecting pipe by excess solder due to increased solder usage.

[0031] In some embodiments, the transition tube 20 and the connecting tube 30 are two independent tubular structures, formed separately. The assembly section 31 of the connecting tube 30 and the outer section 22 of the transition tube 20 are adapted to each other and form a butt joint or insertion joint. When the assembly section 31 and the outer section 22 are butt jointed, the end of the assembly section 31 contacts the end of the outer section 22 that is relatively far from the insertion section 21. When the assembly section 31 and the outer section 22 are inserted, either the end of the assembly section 31 can be inserted into the end of the outer section 22 that is relatively far from the insertion section 21, or the end of the outer section 22 that is relatively far from the insertion section 21 can be inserted into the end of the assembly section 31. Preferably, as shown... Figure 1 , Figures 6-7 As shown, the end of the assembly section 31 is inserted into the end of the external section 22 that is relatively far away from the insertion section 21. After the assembly section 31 and the external section 22 are inserted and fixed, they are further welded and fixed.

[0032] It is understood that in other embodiments, the transition pipe 20 and the connecting pipe 30 may also be a single, integrally formed tubular structure. The valve device will be described in detail below using the example of the transition pipe 20 and the connecting pipe 30 being separately formed and assembled.

[0033] In some embodiments, the outer side wall of the valve body 10 is provided with a cannula platform 12, see reference. Figure 2 and Figure 6 The insertion platform 12 has an insertion channel that serves as an insertion port 13 and connects to the valve chamber 11. The insertion section 21 is fitted onto the insertion platform 12 through this insertion channel. The end of the insertion platform 12 extending outside the valve body 10 forms the edge of the insertion port 13, which is the opening edge of the insertion port 13. The end of the insertion platform 12 extending outside the valve body 10 is spaced apart from the supporting part to form a gap 42.

[0034] Before heating the welding component 41, the end of the welding component 41 that is relatively far from the supporting part abuts against the end of the insertion platform 12 that extends out of the valve body 10, and the end of the welding component 41 that is relatively far from the insertion platform 12 abuts against the supporting part; during the heating of the welding component 41, a hot melt connection point or hot melt connection band is formed between the end of the insertion platform 12 that extends out of the valve body 10 and the supporting part. The hot melt connection point and the hot melt connection band are the molten solder formed after the welding component 41 is heated and melted. After the hot melt connection point cools and solidifies, a weld point is formed. After the hot melt connection band cools and solidifies, a weld is formed. The weld point or weld fixes the insertion port 13 to the external section 22.

[0035] With this configuration, the insertion platform 12 is an annular flange located on the side of the valve body 10, resulting in a larger mating area between the valve body 10 and the transition tube 20. This prevents the transition tube 20 from becoming loose or tilted relative to the valve body 10, thus helping to stably secure the welded part 41 through the gap 42.

[0036] Optionally, the inner wall of the insertion stage 12 and the outer peripheral wall of the insertion section 21 are interference-fitted, so that the insertion section 21 and the insertion stage 12 are difficult to slide relative to each other, and the size of the gap 42 is more stable, so that the welded part 41 can be stably fixed in the gap 42; the depth of the transition tube 20 extending into the insertion port 13 is equal to the axial length of the part of the insertion section 21 that is fitted by the insertion stage 12.

[0037] In some embodiments, the welded component 41 is a welded ring fitted onto the transition tube 20. The outer section 22 includes a reducing section 222 located outside the insertion port 13. The supporting portion includes the outer side wall of the reducing section 222, and a gap 42 is formed between the outer side wall of the reducing section 222 and the edge of the insertion port 13. Before welding the insertion port 13 and the outer section 22, the two axial ends of the welded component 41 abut against the edge of the insertion port 13 and the outer side wall of the reducing section 222, respectively. Specifically, see [reference needed]. Figures 3-4 , Figure 6The outer diameter of the variable diameter section 222 increases in a direction away from the insertion port 13 and the insertion section 21. Before heating the welding part 41, the end of the welding part 41 that is relatively away from the edge of the insertion port 13 abuts against the outer wall of the variable diameter section 222. During the heating of the welding part 41, a hot melt connection point or hot melt connection band is formed between the edge of the insertion port 13 and the outer wall of the variable diameter section 222. After the hot melt connection point cools and solidifies, a weld point is formed. After the hot melt connection band cools and solidifies, a weld seam is formed.

[0038] Preferably, such as Figure 6 and Figure 7 As shown, the gap 42 is formed between the end of the insertion platform 12 extending out of the valve body 10 and the outer wall of the reducing section 222. The end of the insertion platform 12 extending out of the valve body 10 is preferably flat, and the normal of the end of the insertion platform 12 extending out of the valve body 10 extends radially along the valve body 10. With this configuration, when the welded part 41 is an annular element, an annular line contact or surface contact is formed between the end of the welded part 41 that is relatively far from the supporting part and the end of the insertion platform 12 extending out of the valve body 10. Therefore, the welded part 41 is not easy to shake or tilt, and reliable positioning of the welded part 41 can be achieved.

[0039] Optionally, such as Figure 6 As shown, the external section 22 also includes an external straight pipe section 223. One end of the external straight pipe section 223 is connected to the insertion section 21, and the other end is connected to the end with the smallest outer diameter on the reducing section 222. The welded part 41 is fitted onto the external straight pipe section 223, and the inner circumference of the welded part 41 mates with the outer circumference of the external straight pipe section 223. When assembling the valve device, the insertion section 21 is first passed through the annular welded part 41 so that the welded part 41 is fitted onto the external straight pipe section 223, and then the insertion section 21 extends into the insertion port 13.

[0040] The following is the assembly process of the valve device of this utility model before welding the external section 22 and the valve body 10: First, insert the insertion section 21 into the welding part 41, and then push the welding part 41 along the axial direction of the insertion section 21 so that the welding part 41 moves to abut against the outer wall of the reducing section 222. Then, insert the insertion section 21 into the insertion channel of the insertion platform 12 until one end of the welding part 41 abuts against the edge of the insertion port 13 and the other end of the welding part 41 abuts against the outer wall of the reducing section 222. At this time, the transition tube 20, the insertion platform 12 and the welding part 41 are coaxially arranged, and the axes of the three are perpendicular to the axis of the valve cavity 11.

[0041] Optionally, the outer diameter of the external straight pipe section 223 is equal to or less than the outer diameter of the insertion section 21. With this configuration, when the insertion section 21 is not inserted into the insertion port 13, the welded part 41 fitted onto the external straight pipe section 223 is less likely to slide onto the insertion section 21, thereby preventing the welded part 41 from falling off the transition pipe 20, and the welded part 41 will not affect the insertion section 21 from extending into the insertion port 13.

[0042] Preferably, the external straight pipe section 223 and the insertion section 21 are coaxially arranged, and both have equal outer and inner diameters. With this arrangement, the structure of the transition pipe 20 is simple and easy to form. The insertion section 21 passes through the welding piece 41 until the welding piece 41 is smoothly fitted onto the external straight pipe section 223, and the shape and size of the welding piece 41 do not change. The welding piece 41 can finally be fixedly fitted onto the external straight pipe section 223.

[0043] Optionally, such as Figure 4 and Figure 6 As shown, the variable diameter section 222 is a conical section with a tapered angle. The outer wall of the variable diameter section 222 is a tapered surface, and the tapered angle of the variable diameter section 222 includes the tapered angle γ of the outer wall of the variable diameter section 222. The tapered angle γ of the outer wall of the variable diameter section 222 ranges from 30° to 90°. In other words, the angle between the generatrix of the outer wall of the variable diameter section 222 and the axis of the transition tube 20 is 15° to 45°. With this configuration, the outer wall of the variable diameter section 222 provides a larger welding adhesion area for the cooled and solidified solder 40.

[0044] It is understood that in other embodiments, the outer wall of the variable diameter section 222 used to form the abutment may not necessarily be a conical surface. For example, the outer wall of the variable diameter section 222 may be a stepped surface, with the stepped surface forming the abutment. The stepped surface and the end of the insertion platform 12 extending outward from the valve body 10 are spaced apart and face each other to form a gap 42. Before welding the welded part 41 and the abutment, the end of the welded part 41 that is relatively away from the edge of the insertion port 13 abuts against the stepped surface; finally, a weld point or weld is formed between the welded part 41 and the stepped surface.

[0045] Optionally, such as Figure 6 As shown, the end of the insertion section 21 that is relatively far from the external section 22 does not protrude from the inner wall of the valve body 10. With this arrangement, the depth to which the transition tube 20 extends into the insertion port 13 is appropriate, and the fluid in the valve cavity 11 will not be disturbed by the insertion section 21 that protrudes from the inner wall of the valve body 10, which helps to reduce the resistance of the fluid flow in the valve cavity 11.

[0046] Optionally, such as Figures 3-4 , Figure 6 As shown, the insertion section 21 and the external section 22 are formed by a continuous tubular element, that is, the transition tube 20 is a one-piece molded element.

[0047] Optionally, the inner diameter of the insertion section 21 is the minimum inner diameter of the transition tube 20, and the inner diameter of the insertion section 21 is greater than or equal to the inner diameter of the assembly section 31.

[0048] With this configuration, as the fluid in the connector 30 flows sequentially through the assembly section 31, the external section 22, and the insertion section 21, the resistance of the fluid is small and almost unchanged.

[0049] Preferably, the inner diameter of the insertion section 21 is equal to the inner diameter of the assembly section 31.

[0050] With this configuration, the resistance of the fluid in the insertion section 21 is equal to the resistance of the fluid in the assembly section 31, further reducing the change in fluid resistance.

[0051] See Figures 3-4 , Figure 6 The outer section 22 also includes a flared section 221 sleeved and welded to the assembly section 31. The inner wall of the flared section 221 is fixedly fitted to the outer wall of the assembly section 31, preferably forming an interference fit. The variable diameter section 222 is located between the flared section 221 and the outer straight pipe section 223. The inner diameter of the variable diameter section 222 decreases in a direction away from the flared section 221 and closer to the outer straight pipe section 223 and the insertion section 21. The end of the assembly section 31 abuts against the inner wall of the variable diameter section 222. With this configuration, the variable diameter section 222 provides axial positioning of the assembly section 31 through its inner wall.

[0052] Preferably, such as Figure 4 As shown, the inner wall of the reducing section 222 is a conical surface. The cone angle of the reducing section 222 includes the cone angle θ of the inner wall of the reducing section 222. The cone angle θ of the inner wall of the reducing section 222 ranges from 30° to 90°. In other words, the angle between the generatrix of the inner wall of the reducing section 222 and the axis of the transition pipe 20 is 15° to 45°. Preferably, the cone angle of the inner wall of the reducing section 222 is equal to the cone angle of the outer wall of the reducing section 222. With this configuration, the reducing section 222 can stably stop the end of the assembly section 31 through its inner wall. The cone angle of the reducing section 222 is appropriate, and the wall thickness of the reducing section 222 is uniform. The structural strength of the transition pipe 20 is high, and weak or vulnerable parts are less likely to appear between the flared section 221 and the external straight pipe section 223.

[0053] Preferably, the outer segment 22 is formed into a variable diameter segment 222 with uniform wall thickness through extrusion processing. The inner conical mold extends into the outer segment 22, and the outer conical mold is located outside the outer segment 22. Extrusion brings the inner wall of the outer segment 22 into contact with the inner conical mold, and extrusion also brings the outer wall of the outer segment 22 into contact with the outer conical mold, thereby obtaining the inner and outer walls of the variable diameter segment 222 with conical shapes. When both the inner and outer walls of the variable diameter segment 222 are conical and the wall thickness of the variable diameter segment 222 is uniform, the transition tube 20 has high structural strength, is not easily damaged during the forming process, and has a high yield rate.

[0054] In other embodiments, the flared section 221 is bonded to the assembly section 31 of the connector 30 rather than welded.

[0055] In other embodiments, the weldment 41 may be two or more arc-shaped elements, which form a ring structure that surrounds the outside of the transition tube 20 and is secured in the gap 42 by the abutment and the edge of the insertion port 13.

[0056] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A valve device, characterized in that, The device includes a valve body (10), a valve connector, and a welded component (41). The valve body (10) has an insertion port (13). The valve connector includes an insertion section (21) and an external section (22). The insertion section (21) extends into the insertion port (13). The external section (22) is located outside the insertion port (13) and includes a supporting portion. A gap (42) is formed between the supporting portion and the insertion port (13). The gap (42) contains solder (40), and the solder (40) welds and fixes the external section (22) to the valve body (10).

2. The valve device as claimed in claim 1, characterized in that, The valve body (10) includes an insertion platform (12) with the insertion port (13) provided. The insertion platform (12) cooperates with the insertion section (21), and the gap (42) is formed between the end of the insertion platform (12) and the supporting part.

3. The valve device as claimed in claim 1, characterized in that, The external segment (22) includes a variable diameter segment (222), the outer diameter of which increases in a direction away from the insertion segment (21), and the abutment includes the outer sidewall of the variable diameter segment (222).

4. The valve device as claimed in claim 3, characterized in that, The variable diameter section (222) is a conical section, and the cone angle of the conical section is 30°~90°.

5. The valve device according to any one of claims 1 to 4, characterized in that, The external section (22) also includes an external straight pipe section (223) for the installation of the welding component (41), and the two ends of the external straight pipe section (223) are respectively connected to the insertion section (21) and the supporting part.

6. The valve device as claimed in claim 5, characterized in that, The outer diameter of the external straight pipe section (223) is equal to or less than the outer diameter of the insertion section (21).

7. The valve device according to any one of claims 1 to 4, characterized in that, The end of the insertion section (21) that is relatively far from the external section (22) does not protrude from the inner wall of the valve body (10); and / or, the valve connecting pipe includes a transition pipe (20) and a connecting pipe (30), the transition pipe (20) including the insertion section (21) and the external section (22), and the connecting pipe (30) being connected to or inserted into the external section (22).

8. The valve device as claimed in claim 7, characterized in that, The connector (30) includes an assembly section (31) connecting the external section (22), the inner diameter of the insertion section (21) being the minimum inner diameter of the transition tube (20) and greater than or equal to the inner diameter of the assembly section (31); and / or, the insertion section (21) and the external section (22) are formed from a continuous tubular element.

9. The valve device as claimed in claim 8, characterized in that, The external section (22) includes a flared section (221) that is fitted onto and welded to the assembly section (31).

10. The valve device as claimed in claim 9, characterized in that, The external section (22) further includes a variable diameter section (222), which is located between the flared section (221) and the insertion section (21). The inner diameter of the variable diameter section (222) decreases in a direction away from the flared section (221), and the inner wall of the variable diameter section (222) abuts against the assembly section (31).

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