Valve body welding system and valve body welding method

Abstract

A valve body welding system (100) and a valve body welding method are provided for welding a valve body (102) to an external pipeline (30), the valve body (102) including a main valve (10) and a sleeve (20), the sleeve (20) being connected to the main valve (10), and the external pipeline (30) including a welding point (31), the welding method including the steps of: S1: fitting the sleeve (20) to the outside of the external pipeline (30), S2: contacting a first position (22) of the sleeve (20) with a coolant (101) to set a first predetermined distance between the first position (22) and an end face of the sleeve (20) facing the main valve (10), and S3: welding the sleeve (20) to the external pipeline (30) at the welding point (31), and solidifying a welding material on an inner wall of the sleeve (20).

Description

Technical Field

[0001] Related Application This application claims the priority of a Chinese patent application with an application number of 202210227012.2 and an invention title of "Valve Body Welding System and Valve Body Welding Method", which was filed on March 8, 2022, and all its contents are incorporated herein by reference.

[0002] This application relates to the field of cooling systems, and in particular, to a valve body welding system and a valve body welding method.

Background Art

[0003] In a cooling system, the valve body plays an important role in controlling the conduction and blocking of the medium in the pipeline, the flow direction, and the flow rate. The valve body is an essential part of the cooling system, and the valve body welding system can weld the valve body and the external pipeline.

[0004] In related technologies, the valve body needs to be connected to the external pipeline during the installation process, and welding is often used as the connection method. When the welding material flows from the external pipeline to the valve body and finally contacts the valve body, since the temperature of the valve body is much lower than that of the external pipeline, the welding material does not stay on the inner surface of the valve body and slowly solidify, but rapidly condenses, that is, it rapidly changes from a liquid state to a solid state, becomes welding slag, and falls into the interior of the valve body, causing problems such as the internal leakage exceeding the standard value or the direction being unable to be switched. When the material of the valve body is different from the material of the external pipeline and there is a large difference in their thermal conductivities, the above problems are particularly serious.

Summary of the Invention

[0005] According to various embodiments of the present application, a valve body welding system and a valve body welding method are provided.

[0006] This application relates to a valve welding method for welding a valve body to an external pipeline, wherein the valve body includes a main valve and a sleeve, the sleeve is connected to the main valve, and the external pipeline includes a welding point, and the method is S1: Step of fitting the sleeve to the outside of the external pipeline. S2: A step of bringing the first position of the sleeve into contact with the coolant, and setting the distance between the first position and the end face of the sleeve facing the main valve to a first predetermined distance, and S3: At the welding point, the sleeve and the external pipeline are welded together, and the welding material is allowed to solidify on the inner wall of the sleeve. The present invention provides a valve body welding method, including the provision of a valve body welding method.

[0007] In one embodiment, in step S2, the first predetermined distance s is 0 mm to 5 mm.

[0008] In one embodiment, in step S2, the main valve and sleeve are immersed in the coolant to bring the coolant level and the first position to the same height, or the coolant is sprayed towards the sleeve at the first position.

[0009] In one embodiment, in step S3, the welding location is located outside the sleeve, and the distance H between the welding location and one end of the sleeve away from the main valve is 2 mm to 30 mm.

[0010] In one embodiment, in step S3, the welding location is welded by a welding gun, the direction of the welding gun is away from the sleeve, and the angle between the direction of the welding gun and the welding location is 1° to 45°.

[0011] In one embodiment, in step S3, the welding location is located inside the sleeve, and the distance h between the welding location and one end of the sleeve away from the main valve is 2 mm to 30 mm.

[0012] In one embodiment, in step S3, the welding area is welded using a high-frequency welding ring.

[0013] In one embodiment, in step S1, the external pipeline abuts against the sleeve, and the external pipeline and the inner wall of the sleeve are fitted together with a clearance to allow the welding material to flow.

[0014] This application further provides a valve welding system comprising a coolant, a valve body, and an external pipeline, wherein the valve body and the external pipeline are welded by the valve welding method described above, the valve body comprising a main valve and a sleeve, the sleeve being connected to the main valve, the external pipeline being connected to the sleeve, the inner wall of the sleeve being provided with projections, the projections having an inner diameter smaller than the outer diameter of the external pipeline in at least a portion thereof, and the outer wall of the sleeve being in contact with the coolant.

[0015] In one embodiment, the side of the projection away from the main valve is a first step, and the projection is in contact with the external pipeline, while the side of the projection closer to the main valve is a second step, and the second step is in contact with the main valve.

[0016] In one embodiment, both the first and second steps are inclined surfaces, or both the first and second steps are flat surfaces.

[0017] In one embodiment, when both the first and second steps are inclined surfaces, the angle between the inclined surface and the axis of the sleeve is 15° to 30°.

[0018] Details of one or more embodiments of this application are presented in the following drawings and description. Other features, purposes and advantages of this application will become apparent in the specification, drawings and claims. [Brief explanation of the drawing]

[0019] To better describe and explain the embodiments and / or exemplifications of these inventions disclosed herein, one or more drawings can be referred to. The additional details or exemplifications used to explain the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or exemplifications described herein, and the optimal forms of these inventions understood herein.

[0020] [Figure 1] It is a cross-sectional view of a valve body welding system according to one or more embodiments. [Figure 2] It is a perspective view of a valve body welding system body according to one or more embodiments. [Figure 3] It is a cross-sectional view of a valve body welding system according to one or more embodiments. [Figure 4] It is a cross-sectional view of a valve body welding system according to one or more embodiments.

[0021] The meanings of each reference numeral in the drawings are as follows. 100 Valve body welding system, 101 Cooling liquid, 102 Valve body, 10 Main valve, 20 Sleeve, 21 Protrusion, 211 First step, 212 Second step, 22 First position, 30 External pipeline, 31 Welding location.

Embodiments for Carrying Out the Invention

[0022] To make the above objects, features, and advantages of the present application clearer and easier to understand, the following will refer to the drawings to detail the specific embodiments of the present application. In the following description, various specific details are described to make the present application fully understandable. However, the present application can be implemented in many other aspects different from those described herein, and those skilled in the art can make similar improvements as long as they do not violate the content of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when an assembly is said to be "fixed to" or "provided on" another assembly, it may be directly fixed to the other assembly, or there may be intervening assemblies. When an assembly is considered to be "connected to" another assembly, it may be directly connected to the other assembly, or intervening assemblies may exist simultaneously. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only embodiment.

[0024] Furthermore, the terms "first" and "second" are for illustrative purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features limited by "first" and "second" may explicitly include at least one of the features or implicitly include them. In the description of this application, "a plurality" means at least two, for example, two, three, etc., unless there is a clear and specific limitation.

[0025] In this application, unless there are particularly clear regulations and limitations, the fact that the first feature is "above" or "below" the second feature may mean that the first feature and the second feature are in direct contact or in indirect contact through an intermediate medium. Furthermore, the fact that the first feature is "above", "upward" and "upper side" of the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "below", "downward" and "lower side" of the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as that commonly understood by those skilled in the art. Terms used in the specification of this application are for the purpose of describing specific embodiments and are not intended to limit this application. The terms “and / or” used in the specification of this application include any and all combinations of the relevant enumerated items, one or more.

[0027] Referring to Figures 1 and 2, the valve body welding system 100 provided in this application can weld the external pipeline 30 to the valve body 102.

[0028] In this embodiment, the valve welding system 100 includes a four-way valve, a coolant 101, and an external pipeline 30. In other embodiments, the valve body 102 is not limited to the four-way valve described in this embodiment, but may be provided as a three-way valve, a five-way valve, a stop valve, a throttle valve, etc. The coolant 101 and the valve body 102 come into contact, providing a cooling effect to the valve body 102 during the welding process.

[0029] The valve body 102 includes a main valve 10 and a sleeve 20, the sleeve 20 being connected to the main valve 10. An external pipeline 30 is connected to the sleeve 20, and a projection 21 is provided on the inner wall of the sleeve 20, the projection 21 having an inner diameter smaller than the outer diameter of the external pipeline 30 in at least part of its diameter, and the outer wall of the sleeve 20 is in contact with the coolant 101. In this way, the flow path of the welding material on the inner wall of the sleeve 20 is lengthened, and the flow path does not remain oriented vertically downwards for the entire duration, ensuring the axial length of the projection 21, and ensuring that the flow distance along the axial direction of the sleeve is sufficiently long as the welding material flows through the projection 21, so that the welding material can remain on the projection 21 for a sufficiently long time, allowing the welding material to solidify more thoroughly and solidify on the projection 21, and further preventing welding slag from falling into the main valve. If the projection 21 is not provided, the welding material will not solidify and will flow into the main valve 10. There, it will come into contact with the lower temperature of the main valve 10, solidify rapidly, and become welding slag, which will then fall into the interior of the main valve 10.

[0030] Furthermore, the thermal conductivity of the main valve 10 is lower than that of the sleeve 20. The inner wall of the sleeve 20 is provided with protrusions 21, which can hold welding material in place, and the length of the protrusions 21 along the axial direction of the sleeve 20 is 5 mm to 25 mm.

[0031] The projection 21 is formed by pressure processing against the outer wall of the sleeve 20.

[0032] Specifically, the side of the projection 21 away from the main valve 10 is the first step 211, which abuts against the external pipeline 30, and the side of the projection 21 closer to the main valve 10 is the second step 212, which abuts against the main valve 10.

[0033] In this embodiment, both the first step 211 and the second step 212 are inclined surfaces, which abut against the external pipeline 30 and the main valve 10 to provide interference fit, thereby making the connection between the three components tighter and preventing leakage of welding material.

[0034] In other embodiments, the first step 211 and the second step 212 may be flat surfaces, thereby increasing the contact area with the external pipeline 30 and the main valve 10. The installation of the first step 211 and the second step 212 is not limited to the inclined surfaces in this embodiment, and is acceptable as long as it enables connection of the three components and prevents leakage of welding material.

[0035] Furthermore, the angle between the inclined surface and the axis of the sleeve 20 is 15° to 30°. Within this angle range, the contact between the inclined surface and the sleeve 20 and the external pipeline 30 is tightest, and the projection 21 prevents the inner diameter of the sleeve 20 from becoming too small, thus preventing throttling.

[0036] The axial length of the sleeve 20 is 18mm to 60mm, which ensures sufficient connection length between the sleeve 20 and the main valve 10 and external pipeline 30, improving connection stability, and allowing for a wider range of compatible main valve 10 types and thus a broader range of suitable operating environments.

[0037] Since the sleeve 20 has the same diameter at both ends, the flow resistance of the medium is reduced. Furthermore, because the wall thickness of the sleeve 20 is uniform along its axial direction, the difficulty and cost of processing are reduced, and the overall integrity, coaxiality, and consistency of the sleeve 20 are improved.

[0038] In this embodiment, the main valve 10 is made of stainless steel and the sleeve 20 is made of copper. Stainless steel is inexpensive and has high hardness, so using stainless steel for the main valve 10 improves the durability and stability of the finished product and reduces the cost of the product. Since the external pipeline 30 is often made of copper, using copper for the sleeve 20 brings the thermal conductivity of the sleeve 20 closer to that of the external pipeline 30, reducing the temperature difference between the two. This prevents the welding material from solidifying rapidly due to the lower temperature of the sleeve 20, preventing it from remaining at the position of the projection 21 and falling onto the main valve 10.

[0039] The external pipeline 30 and the sleeve 20 are clearance-fitted, and the portion of the projection 21 located between the first step 211 and the second step 212 is a straight pipe segment parallel to the axis of the sleeve 20. The diameter of the straight pipe segment is smaller than the outer diameter of the external pipeline 30, which allows the welding material to flow through the gap between the external pipeline 30 and the sleeve 20, and further into the sleeve 20, enabling deposition on the inner wall of the sleeve 20 and strengthening the weld.

[0040] Furthermore, the valve body welding system 100 further includes a water tank or a spray gun, the water tank containing a coolant 101, the valve body 102 being immersed in the coolant 101, the liquid level of the coolant 101 being at a first position 22, and a large amount of coolant 101 ensuring a cooling effect. In another embodiment, the spray gun sprays the coolant 101 toward the first position 22 to make operation and processing more convenient and faster.

[0041] This application further provides a valve welding method to solve the technical problem that arises when there is a large difference between the thermal conductivity of the valve body 102 and that of the external pipeline 30, and the temperature of the valve body 102 is low, causing the welding material to solidify rapidly and easily become welding slag, which falls into the inside of the valve body 102 and affects the performance of the valve body 102.

[0042] In this embodiment, the above method is applied to welding a four-way valve to an external pipeline 30. The external pipeline includes a welding point 31. In other embodiments, the above method is not limited to the four-way valve described in this embodiment, but may be applied to three-way valves, five-way valves, stop valves, throttle valves, etc.

[0043] The above method, S1: Step of fitting sleeve 20 to the outside of external pipeline 30, S2: A step of bringing the first position 22 of the sleeve 20 into contact with the coolant 101, and setting the distance between the first position 22 and the end face of the sleeve 20 facing the main valve 10 to a first predetermined distance, and S3: A step in which the sleeve 20 and the external pipeline 30 are welded at the welding site, and the welding material is solidified on the inner wall of the sleeve 20. Includes.

[0044] By providing a sleeve 20 between the main valve 10 and the external pipeline 30, where there is a large difference in thermal conductivity, the thermal conductivity of the sleeve 20 becomes closer to that of the external pipeline 30 because the thermal conductivity of the sleeve 20 is greater than that of the main valve 10. During the welding process, the temperature difference between the sleeve 20 and the external pipeline 30 is small, thus avoiding the problem of the welding material encountering a material at an extremely low temperature, solidifying rapidly, and falling into the interior of the main valve 10. In addition, because the outside of the sleeve 20 is in contact with the coolant 101, the welding material solidifies on the inner wall of the sleeve 20 without continuing to flow, preventing welding slag from falling into the interior of the main valve 10.

[0045] Specifically, in step S1, the external pipeline 30 and the sleeve 20 are fitted together with a clearance, so the welding material flows into the gap between them, and the temperature of the sleeve 20 is lowered by the cooling action of the coolant 101, so the welding material solidifies inside the sleeve 20.

[0046] As shown in Figures 1 and 4, in step S2, the first predetermined distance s is 0 mm to 5 mm. In this region, the coolant 101 plays a role in lowering the temperature of the sleeve 20 and solidifying the welding material. At the same time, by providing a wide setting range for the position of the coolant 101, the difficulty of setting the coolant 101 during processing is reduced, the efficiency of processing and production is improved, and the welding material can be solidified in the appropriate position. If the position of the coolant 101 is too close to the main valve 10, welding slag is more likely to fall into the main valve 10. If the position of the coolant 101 is too close to the welding location 31, it will affect the welding temperature during welding and affect the welding quality.

[0047] When the first predetermined distance s is 0 mm, the coolant 101 is in contact with the end face of the sleeve 20 facing the main valve 10. As the temperature of the sleeve 20 rises due to the welding process, the coolant 101 in contact with the end face of the sleeve 20 facing the main valve 10 acts as a heat absorber, lowering the temperature of the sleeve 20. This allows the welding material to solidify as it flows along the inner wall of the sleeve 20.

[0048] The welding point 31 is located outside the sleeve 20, and the distance H between the welding point 31 and one end of the sleeve 20 away from the main valve 10 is 2 mm to 30 mm. This makes it easy to weld the sleeve 20 and the external pipeline 30 smoothly. If the welding point 31 is too close to the sleeve 20, the welding operation becomes difficult, and if the welding point 31 is too far from the sleeve 20, the welding material will not be able to flow into the gap between the sleeve 20 and the external pipeline 30.

[0049] In step S3, the sleeve 20 and the external pipeline 30 are welded together at the welding point 31 using a welding gun. The direction of the welding gun is away from the sleeve 20, and the angle between the direction of the welding gun and the welding point 31 is 1° to 45°. As a result, the direction of the welding gun's temperature influence is moved away from the sleeve 20. Therefore, the temperature of the sleeve 20 rises rapidly due to the welding process, preventing the welding material from solidifying in the sleeve 20 and eventually flowing into the main valve 10. However, because the temperature of the main valve 10 is extremely low, the welding material does not solidify rapidly in the main valve 10 and fall into the interior of the main valve 10, thus preventing this.

[0050] Furthermore, referring to Figure 3, in another embodiment, in step S3, the welding location 31 is located inside the sleeve 20, and the distance h between the welding location and one end of the sleeve 20 away from the main valve 10 is 2 mm to 30 mm. In this case, the welding location 31 is welded using a high-frequency welding ring.

[0051] Specifically, during the welding process, a high-frequency welding ring is placed inside the sleeve 20 to raise the temperature of the welding area 31. At this time, the welding material is located at one end of the sleeve 20 away from the main valve 10. As the temperature of the sleeve 20 rises, the welding material melts and flows along the gap between the sleeve 20 and the external pipeline 30 towards the main valve 10, and finally solidifies on the inner wall of the sleeve 20.

[0052] Because the high-frequency welding ring has a small temperature-affected zone, it is possible to more precisely control the high-temperature areas during welding. Even when the high-frequency welding ring is placed inside the sleeve 20 during welding, the problem of the welding material being unable to solidify inside the sleeve 20 due to the overall temperature rise of the sleeve 20 can still be avoided.

[0053] In this embodiment, the main valve 10 and sleeve 20 are immersed in the coolant 101, bringing the liquid level of the coolant 101 to the same height as the first position 22, thereby increasing the contact of the sleeve 20 with more of the coolant 101 and improving the cooling effect.

[0054] In another embodiment, the coolant 101 is injected toward the sleeve 20 at the first position 22, making the operation more convenient and faster, improving production efficiency, and reducing the amount of coolant 101 used.

[0055] In this embodiment, the coolant 101 is water. Because water has a high specific heat, it provides excellent cooling for the sleeve 20, and at the same time, its low price reduces costs. In other embodiments, it is understood that other coolants may be selected by considering factors such as cooling efficiency, cost, and operating environment. The coolant is not limited to water in this embodiment.

[0056] Compared to conventional technology, this application provides a sleeve 20 between the main valve 10 and the external pipeline 30, which have a large difference in thermal conductivity. Because the thermal conductivity of the sleeve 20 is greater than that of the main valve 10, the thermal conductivity of the sleeve 20 becomes closer to that of the external pipeline 30. During the welding process, the temperature difference between the sleeve 20 and the external pipeline 30 is small, thus avoiding the problem of the welding material encountering a material at an extremely low temperature, solidifying rapidly, and falling into the main valve 10. In addition, because the outside of the sleeve 20 is in contact with the coolant 101, the welding material solidifies on the inner wall of the sleeve 20 without continuing to flow, preventing welding slag from falling into the main valve 10.

[0057] The technical features of the embodiments described above can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the embodiments described above have been explained. However, as long as these combinations of technical features are inconsistent, they should all be considered to fall within the scope described herein.

[0058] The embodiments described above are merely examples of some embodiments of this application, and although their descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the claims of the present invention. Those skilled in the art may make several modifications and improvements, provided they do not depart from the spirit of this application, and it should be noted that all of these fall within the scope of protection of this application. Therefore, the scope of protection of the patent in this application shall be in accordance with the attached claims.

Claims

1. A valve welding method for welding a valve body to an external pipeline, wherein the valve body includes a main valve and a sleeve, the sleeve is connected to the main valve, the external pipeline includes a welding point, and the method is S1: A step of fitting the sleeve onto the outside of the external pipeline, S2: A step of bringing the first position of the sleeve into contact with the coolant, and setting the distance between the first position and the end face of the sleeve facing the main valve to a first predetermined distance, and S3: A step of welding the sleeve and the external pipeline at the welding location and solidifying the welding material on the inner wall of the sleeve. Includes, In step S2, the main valve and the sleeve are immersed in the coolant so that the liquid level of the coolant and the first position are at the same height. Valve body welding method.

2. The valve body welding method according to claim 1, wherein in step S2, the first predetermined distance is 0 mm or more and 5 mm or less.

3. The valve body welding method according to claim 1, wherein in step S3, the welding location is located outside the sleeve, and the distance H between the welding location (31) and one end of the sleeve away from the main valve is 2 mm or more and 30 mm or less.

4. The valve body welding method according to claim 1, wherein in step S3, the welding location is welded by a welding gun, the direction of the welding gun is away from the sleeve, and the angle between the direction of the welding gun and the welding location is 1° or more and 45° or less.

5. The valve body welding method according to claim 1, wherein in step S3, the welding location is located inside the sleeve, and the distance h between the welding location and one end of the sleeve away from the main valve is 2 mm or more and 30 mm or less.

6. In step S3, the welding location (31) is welded using a high-frequency welding ring, the valve body welding method according to claim 5.

7. The valve body welding method according to claim 1, wherein in step S1, the external pipeline abuts against the sleeve, and the external pipeline and the inner wall of the sleeve are clearance-fitted so that welding material can flow through them.

8. A valve welding system comprising a coolant, a valve body, and an external pipeline, wherein the valve body and the external pipeline are welded by a valve welding method according to any one of claims 1 to 7, the valve body comprising a main valve and a sleeve, the sleeve being connected to the main valve, the external pipeline being connected to the sleeve, the inner wall of the sleeve being provided with a projection, the projection having an inner diameter smaller than the outer diameter of the external pipeline in at least a portion thereof, and the outer wall of the sleeve being in contact with the coolant.

9. The valve body welding system according to claim 8, wherein the side of the projection away from the main valve is a first step, the first step and the external pipeline are in contact, and the side of the projection closer to the main valve is a second step, the second step and the main valve are in contact.

10. The valve body welding system according to claim 9, wherein both the first step and the second step are inclined surfaces, or both the first step and the second step are flat surfaces.

11. The valve body welding system according to claim 10, wherein when both the first step and the second step are inclined surfaces, the angle between the inclined surface and the axis of the sleeve is 15° or more and 30° or less.

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