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 Applications This application claims priority to a Chinese patent application filed on March 8, 2022, bearing application number 202210227012.2 and entitled "Valve body welding system and valve body welding method," the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD This application relates to the field of cooling systems, and more particularly to a valve body welding system and method. [Background technology]

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

[0004] The valve body in the related art needs to be connected to the external pipeline during the installation process, and the connection method is often welding. When the welding material flows from the external pipeline to the valve body and finally contacts the valve body, the temperature of the valve body is much lower than that of the external pipeline, so the welding material will rapidly solidify instead of remaining on the inner surface of the valve body and slowly solidifying, that is, it will rapidly turn from liquid to solid, and become welding slag, which will fall into the inside of the valve body, causing problems such as internal leakage exceeding the standard value and unable to switch direction. When the material of the valve body is different from the material of the external pipeline and there is a large difference in thermal conductivity between the two, the above problem is particularly serious. Summary of the Invention

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

[0006] The present application relates to a valve body welding method for welding a valve body and an external pipeline, the valve body including a main valve and a sleeve, the sleeve being connected to the main valve, the external pipeline including a welding point, and the method includes: S1: fitting a sleeve to the outside of the outer pipeline; S2: A step of contacting a first position of the sleeve with the coolant and setting a distance between the first position and an end surface of the sleeve facing the main valve to a first predetermined distance; and S3: welding the sleeve and the outer pipeline at the welding point, and solidifying the welding material on the inner wall of the sleeve; The present invention provides a valve body welding method, comprising:

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

[0008] In one embodiment, in step S2, the main valve and the sleeve are immersed in the cooling liquid, and the level of the cooling liquid is made to be the same as that of the first position, or the cooling liquid is sprayed toward the sleeve at the first position.

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

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

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

[0012] In one embodiment, in step S3, the weld points are welded using a radio frequency weld ring.

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

[0014] The present application further provides a valve body welding system, including a coolant, a valve body and an external pipeline, in which the valve body and the external pipeline are welded by the above valve body welding method, the valve body includes a main valve and a sleeve, the sleeve is connected to the main valve, the external pipeline is connected to the sleeve, and a protrusion is provided on an inner wall of the sleeve, and at least a part of the inner diameter of the protrusion is smaller than the outer diameter of the external pipeline, and the outer wall of the sleeve contacts the coolant.

[0015] In one embodiment, the side of the protrusion away from the main valve is a first step where the protrusion abuts the external pipeline, and the side of the protrusion closer to the main valve is a second step where the second step abuts the main valve.

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

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

[0018] The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief description of the drawings]

[0019] To better describe and explain the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings, in which additional details or examples used to explain the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described herein, and the best mode of these inventions as understood herein.

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

[0021] The meanings of the symbols in the drawings are as follows: 100 valve body welding system, 101 coolant, 102 valve body, 10 main valve, 20 sleeve, 21 protrusion, 211 first step, 212 second step, 22 first position, 30 outer pipeline, 31 welding point. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order to make the above objects, features and advantages of the present application clearer and easier to understand, the following describes in detail the specific embodiments of the present application with reference to the drawings. In the following description, various specific details are described in order to facilitate a full understanding of the present application. 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 without going against the content of the present application, so the present application is not limited by the specific examples disclosed below.

[0023] It should be explained that when an assembly is referred to as being "fixed" or "mounted" on another assembly, it may be directly fixed to the other assembly or there may be an intervening assembly present. When an assembly is referred to as being "connected" to another assembly, it may be directly connected to the other assembly or there may be an intervening assembly present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for descriptive purposes only and do not represent the only embodiments.

[0024] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying a relative importance or implicitly designating the number of technical features depicted. Thus, a feature qualified with "first" or "second" may explicitly state or implicitly include at least one of that feature. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless explicitly and specifically limited.

[0025] In this application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," and "upper side" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "lower side" of a second feature may mean that the first feature is directly below or diagonally 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 commonly understood by those skilled in the art of this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the application. The term "and / or" used in the specification of this application includes one or more of any and all combinations of the associated listed items.

[0027] 1 and 2, a valve body welding system 100 provided by the present application can weld an outer pipeline 30 and a valve body 102 together.

[0028] In this embodiment, the valve body 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, and may be provided as a three-way valve, a five-way valve, a stop valve, a throttle valve, etc. The contact between the coolant 101 and the valve body 102 serves to cool the valve body 102 during the welding process.

[0029] The valve body 102 includes a main valve 10 and a sleeve 20, and the sleeve 20 is connected to the main valve 10. The external pipeline 30 is connected to the sleeve 20, and the inner wall of the sleeve 20 is provided with a protrusion 21, and at least a part of the inner diameter of the protrusion 21 is smaller than the outer diameter of the external pipeline 30, and the outer wall of the sleeve 20 contacts the coolant 101. In this way, the flow path of the welding material on the inner wall of the sleeve 20 is lengthened, and at the same time, the flow path does not always face vertically downward, and the axial length of the protrusion 21 is ensured, and when the welding material flows through the protrusion 21, the flow distance along the axial direction of the sleeve is ensured to be sufficiently long, so that the welding material can stay on the protrusion 21 for a sufficiently long time, and the welding material can be more thoroughly solidified, and the welding slag can be prevented from solidifying on the protrusion 21 and even falling into the main valve. If the protrusions 21 were not provided, the welding material would flow to the main valve 10 without solidifying, and would come into contact with the low-temperature main valve 10, solidify rapidly, turn into welding slag, and drop into the inside of the main valve 10.

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

[0031] The protrusions 21 are formed by pressing the outer wall of the sleeve 20 .

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

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

[0034] In other embodiments, the first step 211 and the second step 212 may be flat, which increases the contact area with the external pipeline 30 and the main valve 10. The arrangement of the first step 211 and the second step 212 is not limited to the inclined surface in this embodiment, as long as it can realize the connection of the three and prevent leakage of the 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 inclined surface abuts most tightly with the sleeve 20 and the external pipeline 30, and it is also possible to prevent the inner diameter of the sleeve 20 from becoming too small due to the protrusion 21, resulting in throttling.

[0036] The axial length of the sleeve 20 is 18 mm to 60 mm, which ensures the connection length between the sleeve 20 and the main valve 10 and the external pipeline 30, improves the connection stability, and makes it suitable for more types of main valves 10 and a wider range of operating environments.

[0037] Since the sleeve 20 has the same diameter at both ends, the flow resistance of the medium is reduced, and since the wall thickness of the sleeve 20 is uniform along the axial direction of the sleeve 20, the difficulty and cost of processing is reduced, and the integrity, coaxiality and conformity 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 low cost and has high hardness, so if the main valve 10 is made of stainless steel, the durability and stability of the finished product can be improved and the cost of the product can be reduced. Since the external pipeline 30 is often made of copper, if the sleeve 20 is made of copper, the thermal conductivity of the sleeve 20 can be closer to that of the external pipeline 30, and the temperature difference between the two can be reduced. The low temperature of the sleeve 20 can prevent the welding material from solidifying quickly and not staying at the position of the protrusion 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 protrusion 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, and the diameter of the straight pipe segment is smaller than the outer diameter of the external pipeline 30, so that the welding material can flow through the gap between the external pipeline 30 and the sleeve 20, and even flow into the sleeve 20, thereby realizing condensation on the inner wall of the sleeve 20 and strengthening the strength of the weld.

[0040] In addition, the valve body welding system 100 further includes a water tank or a spray gun, the water tank contains a cooling liquid 101, the valve body 102 is immersed in the cooling liquid 101, and the surface of the cooling liquid 101 is located at the first position 22, so that a large amount of the cooling liquid 101 can ensure a cooling effect. In another embodiment, the spray gun sprays the cooling liquid 101 toward the first position 22, so that the operation and processing are more convenient and quick.

[0041] The present application further provides a valve body welding method to solve the technical problem that, due to the large difference between the thermal conductivity of the valve body 102 and that of the external pipeline 30, and the low temperature of the valve body 102, the welding material is easily solidified into 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 and 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 a three-way valve, a five-way valve, a stop valve, a throttle valve, etc.

[0043] The above method is S1: fitting the sleeve 20 to the outside of the outer pipeline 30; S2: A step of contacting the first position 22 of the sleeve 20 with the coolant 101 and setting a distance between the first position 22 and an end face of the sleeve 20 facing the main valve 10 to a first predetermined distance; and S3: welding the sleeve 20 and the outer pipeline 30 at the welding point, and solidifying the welding material on the inner wall of the sleeve 20; Includes.

[0044] By providing the sleeve 20 between the main valve 10 and the external pipeline 30, which have a large difference in thermal conductivity, the thermal conductivity of the sleeve 20 is greater than that of the main valve 10, and therefore the thermal conductivity of the sleeve 20 is 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, so that the problem of the welding material encountering a very low temperature material and rapidly solidifying, and dropping into the inside of the main valve 10 is avoided. In addition, since the outside of the sleeve 20 contacts the coolant 101, the welding material does not continue to flow and solidifies on the inner wall of the sleeve 20, preventing the welding slag from dropping into the inside of the main valve 10.

[0045] Specifically, in step S1, the external pipeline 30 and the sleeve 20 are clearance-fitted, so that 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 that the welding material solidifies inside the sleeve 20.

[0046] As shown in FIG. 1 and FIG. 4, in step S2, the first predetermined distance s is 0 mm to 5 mm. In this region, the coolant 101 serves to lower the temperature of the sleeve 20 and solidify the welding material. At the same time, a larger setting range is provided for the position of the coolant 101, which reduces the difficulty of providing the coolant 101 during processing, improves the efficiency of processing and production, and allows the welding material to solidify at an appropriate position. If the position of the coolant 101 is too close to the main valve 10, the welding slag is likely to fall into the main valve 10. If the position of the coolant 101 is too close to the welding point 31, it will affect the welding temperature during welding, which will affect the welding quality.

[0047] It can be understood that when the first predetermined distance s is 0 mm, the coolant 101 just contacts the end surface of the sleeve 20 facing the main valve 10, and when the temperature of the sleeve 20 rises due to the welding process, the coolant 101 in contact with the end surface of the sleeve 20 facing the main valve 10 can play a heat absorption role to reduce the temperature of the sleeve 20, so that the welding material can be solidified in the process of flowing 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 remote from the main valve 10 is 2 mm to 30 mm. This makes it easy to smoothly weld the sleeve 20 and the external pipeline 30. 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 cannot flow to the gap between the sleeve 20 and the external pipeline 30.

[0049] In step S3, a welding gun is used to weld the sleeve 20 and the external pipeline 30 at the welding point 31. 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°. This makes it possible to move the temperature of the welding gun away from the sleeve 20. As a result, the temperature of the sleeve 20 increases rapidly due to the welding process, and the welding material does not solidify in the sleeve 20 and eventually flows into the main valve 10. However, since the temperature of the main valve 10 is extremely low, the welding material does not solidify rapidly in the main valve 10 and does not fall into the inside of the main valve 10.

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

[0051] Specifically, during the welding process, a high-frequency welding ring is inserted into the sleeve 20 to increase the temperature of the welding point 31. At this time, the welding material is located at one end of the sleeve 20 away from the main valve 10. When the temperature of the sleeve 20 increases, the welding material melts and flows along the gap between the sleeve 20 and the external pipeline 30 to the main valve 10, and finally solidifies on the inner wall of the sleeve 20.

[0052] Since the temperature-affected area of ​​the high-frequency welding ring is small, the high-temperature parts during welding can be controlled more precisely. Even if the high-frequency welding ring is placed inside the sleeve 20 and welded, 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 the sleeve 20 are immersed in the cooling liquid 101, so that the liquid level of the cooling liquid 101 is at the same height as the first position 22, and the sleeve 20 comes into contact with more cooling liquid 101, thereby improving the cooling effect.

[0054] In another embodiment, the cooling liquid 101 is sprayed toward the sleeve 20 at the first position 22, so that the operation is more convenient and quicker, the production efficiency is improved, and at the same time, the consumption of the cooling liquid 101 is reduced.

[0055] In this embodiment, the coolant 101 is water, which has a high specific heat and therefore has a very good cooling effect on the sleeve 20, and at the same time, water is inexpensive, so the cost is reduced. It can be understood that in other embodiments, other coolants may be selected by taking into consideration factors such as cooling efficiency, cost, and operating environment. The setting of the coolant is not limited to the water of this embodiment.

[0056] Compared with the prior art, the present application provides a sleeve 20 between the main valve 10 and the external pipeline 30, which have a large difference in thermal conductivity, so that the thermal conductivity of the sleeve 20 is greater than that of the main valve 10, and therefore the thermal conductivity of the sleeve 20 is 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, which avoids the problem that the welding material encounters a very low temperature material, solidifies rapidly, and falls into the main valve 10. In addition, since the outside of the sleeve 20 contacts the coolant 101, the welding material does not continue to flow, but solidifies on the inner wall of the sleeve 20, which prevents the welding slag from falling into the main valve 10.

[0057] Each of the technical features of the above-mentioned embodiments may be combined in any combination. For the sake of brevity, not all possible combinations of each of the technical features in the above-mentioned embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, all of them should be considered within the scope described in this specification.

[0058] The above examples merely show some embodiments of the present application, and although the description is relatively specific and detailed, it should not be understood as limiting the scope of the claims of the present invention. It should be noted that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the scope of the attached claims.

Claims

1. A valve body welding method for welding a valve body and an external pipeline, the valve body including a main valve and a sleeve, the sleeve being connected to the main valve, the external pipeline including a weld point, the method comprising: S1: fitting the sleeve to the outside of the outer pipeline; S2: contacting a first position of the sleeve with a cooling liquid, and setting a distance between the first position and an end surface of the sleeve facing the main valve to a first predetermined distance; and S3: welding the sleeve and the outer pipeline at a welding point, and allowing a welding material to solidify on the inner wall of the sleeve; A valve body welding method comprising:

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

3. 2. The valve body welding method according to claim 1, wherein in step S2, the main valve and the sleeve are immersed in the cooling liquid so that a liquid level of the cooling liquid and the first position are at the same height, or the cooling liquid is sprayed toward the sleeve at the first position.

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

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

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

7. 7. The valve body welding method according to claim 6, wherein in step S3, the welded portion (31) is welded using a high frequency welding ring.

8. 2. The valve body welding method according to claim 1, wherein in step S1, the outer pipeline abuts against the sleeve, and the outer pipeline and an inner wall of the sleeve are clearance-fitted to allow a welding material to flow therebetween.

9. 9. A valve body welding system including a cooling fluid, a valve body, and an external pipeline, the valve body and the external pipeline being welded by the valve body welding method according to any one of claims 1 to 8, the valve body including a main valve and a sleeve, the sleeve being connected to the main valve, the external pipeline being connected to the sleeve, a protrusion being provided on an inner wall of the sleeve, the protrusion having an inner diameter at least partly smaller than an outer diameter of the external pipeline, and an outer wall of the sleeve being in contact with the cooling fluid.

10. 10. The valve body welding system according to claim 9, wherein a side of the protrusion away from the main valve is a first step, and the first step abuts against the external pipeline, and a side of the protrusion closer to the main valve is a second step, and the second step abuts against the main valve.

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

12. 12. The valve body welding system according to claim 11, wherein when the first step and the second step are both inclined surfaces, an included angle between the inclined surface and an axis of the sleeve is equal to or greater than 15 degrees and equal to or less than 30 degrees.

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