Control valve and manufacturing method thereof

Abstract

The invention relates to a control valve which comprises a shell, a lining and a connecting base, at least part of the connecting base is located in a cavity of the shell, the shell comprises a side hole, the lining comprises a first connecting part, and the first connecting part is arranged around the side hole; the control valve further comprises a welding flux melting area, the welding flux melting area comprises a first melting area and a second melting area, the shell further comprises a notch, in the radial direction of the shell, an opening in one side of the notch faces the second melting area, and an opening in the other side of the notch faces the first melting area. According to the control valve, the notch is formed in the shell of the control valve, the opening in one side of the notch is located in the second melting area, and the opening in the other side of the notch is located in the first melting area, so that obstruction among a plurality of welding seams is broken through, welding flux can flow towards the lining through the notch under the capillary action and the gravity action, and the welding efficiency of the shell and the lining is effectively improved; in addition, the invention further provides a manufacturing method of the control valve.

Description

Technical Field

[0001] This invention relates to the field of valve technology for refrigeration systems, and in particular to a control valve and a method for manufacturing the control valve. Background Technology

[0002] Currently, the valve body and bushing of control valves need to be welded together for a sealing connection. However, in a control valve of the background technology, when welding the valve body components, the saddle surface shape at the mating point between the bushing and the valve body is not suitable for placing a welding ring. Therefore, solder paste needs to be manually applied to the saddle surface contour of the bushing. Although this can ensure the welding quality, the overall welding efficiency is low and the labor cost is high when applying solder paste manually. Summary of the Invention

[0003] The primary objective of this invention is to provide a control valve that addresses the problem of improving welding efficiency during the welding of the valve body components, including the housing and bushing.

[0004] A control valve includes a housing, a bushing, and a connecting seat. The connecting seat is at least partially located within a cavity of the housing. The housing includes a side hole. The bushing includes a first connecting portion disposed around the side hole. The control valve further includes a solder melting zone, which includes a first melting zone and a second melting zone. The first melting zone is located between the first connecting portion and the housing, and the second melting zone is located between the connecting seat and the housing. The housing also includes a notch. In the radial direction of the housing, one side of the notch opens towards the second melting zone, and the other side of the notch opens towards the first melting zone. The control valve further includes a first solder. A portion of the first solder covers the outer end face of the connecting seat, and another portion of the first solder covers the wall of the notch. A further portion of the first solder is located in the first melting zone, thereby welding the housing to the first connecting portion and the second melting zone, thereby welding the housing to the connecting seat.

[0005] The present invention provides a control valve that, by creating a notch in the valve housing, with one side of the notch located in the second fusion zone and the other side located in the first fusion zone, removes obstacles between multiple weld seams, allowing the solder to flow through the notch towards the bushing under capillary action and gravity. This effectively improves the welding efficiency between the housing and the bushing, and simultaneously welds the housing and the connecting seat together, achieving a one-time welding of the housing, connecting seat, and bushing.

[0006] The second objective of this invention is to provide a method for manufacturing a control valve, which aims to solve the problem of how to improve welding efficiency when welding the housing and bushing of the control valve body components.

[0007] A method for manufacturing a control valve includes the following steps:

[0008] The rough parts are machined into a housing including side holes and notches;

[0009] A connector is placed in the cavity of the housing, forming a second fusion zone between the connector and the housing. A bushing is placed outside the housing. In the circumferential direction of the side hole, the bushing includes a first connecting portion that fits against the housing, forming a first fusion zone between the first connecting portion and the housing. Before welding the housing and the bushing, a welding ring is placed on the outer end face of the connector, and the welding ring portion corresponds to the notch position.

[0010] The welding ring is melted to form a flowable solder. A portion of the solder covers the outer end face of the connector, and another portion of the solder flows from the second melting zone to the notch. The notch connects the second melting zone and the first melting zone. When the solder passes through the notch, another portion of the solder flows from the second melting zone to the first melting zone, and another portion of the solder covers the wall of the notch. Another portion of the solder is located in the first melting zone.

[0011] After the solder cools, it forms a first solder, which welds and fixes the connector, the housing, and the bushing in one go.

[0012] In the above-described method for manufacturing the control valve, the solder passes through a notch on the housing that connects the first and second melting zones, allowing the connecting seat, housing, and bushing to be welded and fixed in one go during the control valve welding process, thereby improving welding efficiency. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of a first embodiment of a control valve provided by the present invention;

[0014] Figure 2 The present invention provides a control valve Figure 1 Enlarged diagram of point A in the diagram;

[0015] Figure 3 This is a three-dimensional schematic diagram of the housing of a first embodiment of a control valve provided by the present invention;

[0016] Figure 4 A schematic diagram showing the location of the first fusion zone on the housing in a first embodiment of a control valve provided by the present invention;

[0017] Figure 5 A schematic diagram of the welding angle and its overall three-dimensional schematic diagram are provided in the first embodiment of the control valve of the present invention.

[0018] Figure 6 This is a three-dimensional schematic diagram of a second embodiment of a control valve provided by the present invention before the first connecting pipe is installed;

[0019] Figure 7 A schematic diagram of the placement angle during welding and its overall cross-sectional view are provided in the second embodiment of the control valve of the present invention;

[0020] Figure 8 The present invention provides a control valve Figure 7 Enlarged diagram of point B in the image.

[0021] The labels in the attached drawings are as follows: 1-shell, 101-notch, 1011-first slot, 1012-second slot, 11-side hole, 2-bushing, 3-first connector, 4-connector, 401-first end face, 41-step portion, 411-second end face, 5-second connector, 6-first solder, 61-first external solder, 62-second external solder, 63-internal solder, 7-second solder, 8-solder melting zone, 81-second melting zone, 82-first melting zone. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] Please see Figure 1-4 , Figure 1 This is a cross-sectional schematic diagram of a first embodiment of a control valve provided by the present invention; Figure 2 The present invention provides a control valve Figure 1 Enlarged diagram of point A in the diagram; Figure 3 This is a three-dimensional schematic diagram of the housing of a first embodiment of a control valve provided by the present invention; Figure 4 A schematic diagram showing the location of the first fusion zone on the housing in a first embodiment of a control valve provided by the present invention; Figure 5 This is a schematic diagram of the welding angle and an overall three-dimensional schematic diagram of a control valve in the first embodiment of the present invention.

[0024] It should be noted that Figure 1 and Figure 2 The first solder 6 in the diagram represents the finished product after the shell 1 and bushing 2 have been welded together, while... Figure 4 The solder in the text refers to the state of the solder ring placed on the connector 4 before welding, and the solder ring contains flux.

[0025] The control valve in this embodiment includes a housing 1, a bushing 2, a first connecting pipe 3, a second connecting pipe 5, and a connecting seat 4. The connecting seat 4 is at least partially located in the cavity of the housing 1. The connecting seat 4 can serve as a valve seat, and it is located at the end of the cavity of the housing 1. The connecting seat 4 is connected to the second connecting pipe 5. The housing 1 is cylindrical, and a side hole 11 is formed through its radial wall, connecting the internal cavity of the housing 1 to the external space. The bushing 2 is connected to the first connecting pipe 3. The bushing 2 is made of stainless steel, and the housing 1 is made of stainless steel. Made of steel, the bushing 2 includes a first connecting part 21 and a second connecting part 22. The first connecting part 21 is arranged around the side hole 11 and is a saddle-shaped structure adapted to the outer surface of the housing 1. The outer surface of the housing 1 around the side hole 11 that adapts to the first connecting part 21 is the saddle surface contour area that can abut against the first connecting part 21. The second connecting part 22 is welded to the first connecting pipe 3 or the second connecting part 22 and the first connecting pipe 3 are integral pipe fittings. The control valve is provided with a solder melting zone 8, which includes... The system includes a first fusion zone 82 and a second fusion zone 81. The second fusion zone 81 is located between the connecting seat 4 and the housing 1, and is defined as the weld where the outer surface of the connecting seat 4 connects to the inner wall of the housing 1. The first fusion zone 82 is located between the first connecting part 21 and the housing 1, and is defined as the weld where the outer surface of the housing 1 connects to the first connecting part 21. A notch 101 is provided on the housing 1. In the radial direction of the housing 1, one side of the notch 101 opens towards the second fusion zone 81, and the other side of the notch 101... The opening faces the first melting zone 82. The control valve also includes a first solder 6 formed in one go. A portion of the first solder 6 covers the outer end face of the connecting seat 4, another portion of the first solder 6 covers the wall of the notch 101, and another portion of the first solder 6 is located in the first melting zone 82, so that the housing 1 and the first connecting part 21 are welded and fixed. Another portion of the first solder 6 is located in the second melting zone 81, so that the housing 1 and the connecting seat 4 are welded and fixed. In this way, the connecting seat 4, the housing 1 and the bushing 2 can be welded together by the first solder 6.

[0026] In this embodiment, the notch 101 on the housing 1 can connect the second melting zone 81 and the first melting zone 82, thus removing obstacles between multiple welds. The aforementioned one-time formed first solder refers to the one-time welding of each weld by the solder formed by the same welding ring, so that while a part of the solder connects the connecting seat 4 to the housing 1, another part of the solder can flow through the notch 101 towards the bushing 2 under capillary action and gravity, and the other part of the solder acts on the outer contour of the saddle surface where the housing 1 is connected to the first connecting part 21, thereby realizing the fixed connection between the stainless steel housing 1 and the stainless steel bushing 2.

[0027] In this embodiment, the following is defined: Figure 1The axial direction of the housing 1 and the second pipe 5 shown is the longitudinal direction of the control valve, and the axial direction of the first pipe 3 is the transverse direction of the control valve.

[0028] In this embodiment, the notch 101 includes a first slot 1011, which is located at the end of the housing 1 near the connector 4. The first solder 6 includes a first external solder 61. The connector 4 includes a first end face 401 near the first slot 1011, i.e., the first end face 401 is the end face of the connector 4 near the second connector 5. A portion of the first external solder 61 covers the first end face 401 of the connector 4, and another portion of the first external solder 61 covers the bottom and wall of the first slot 1011. A further portion of the first external solder 61 is located in the first melting zone 82 and the second melting zone 81. This strengthens the connection between the connector 4 and the housing 1, and between the housing 1 and the bushing 2.

[0029] Furthermore, a portion of the first external solder 61 is located between the outer surface of the second connector 5 and the inner wall of the connecting seat 4. This allows the welding of the connecting seat 4 and the second connector 5 to be completed simultaneously with the welding of the housing 1 to the bushing 2, improving welding efficiency. As a result, the second connector 5 can be fixed inside the connecting seat 4 after the solder melts, ensuring the reliability of the connection between the second connector 5 and the connecting seat 4.

[0030] In this embodiment, in order to enable the first external solder 61 to better adhere to the first melting zone 82 and to achieve one-time welding of each weld, and in order to enable the base material of the first external solder 61 (e.g., solid solder such as a welding ring) to allow its excess solder to flow towards the bushing 2 under capillary action and gravity during the welding process, the specific range of the relative positional relationship between the outer contour surface of the first connecting part 21, the bottom of the first groove 1011, and the first end face 401 of the connecting seat 4 is described as follows.

[0031] Firstly, to ensure that the solder can effectively flow to the outer contour of the saddle surface under capillary action and gravity, the position and distance between the outer contour surface of the first connecting part 21 and the bottom of the first groove 1011 are explained as follows:

[0032] When the projection surface of the first connecting portion 21 in the lateral direction at least partially covers the projection surface of the first slot 1011 in the lateral direction, the outer contour surface of the first connecting portion 21 protrudes longitudinally relative to the first slot 1011 or... Figure 1 From a certain perspective, the highest point of the outer contour surface of the first connecting part 21 is higher than the bottom of the first slot 1011. Therefore, after the solder flows through the first slot 1011, it directly contacts the first connecting part 21, thereby directly guiding the flow of the solder.

[0033] When the projection surface of the first connecting part 21 in the lateral direction does not cover the projection surface of the first slot 1011 in the lateral direction, in order to ensure that the solder can flow to the predetermined position, at this time, in the longitudinal direction of the control valve, the outer contour surface of the first connecting part 21 can be flush with the bottom of the slot 1011. After the solder flows through the first slot 1011, it directly contacts the first connecting part 21, thereby directly completing the guidance of the solder flow direction; or the first connecting part 21 in Figure 1 The highest point of the outer contour surface under the viewing angle is lower than the bottom of the first groove 1011. There is a first gap between the outer contour surface of the first connecting part 21 and the bottom of the first groove 1011. The first gap is no more than 0.3mm. Since the first gap is short, although there is a first gap, the solder can still flow through the first groove 1011 to the outer contour surface of the first connecting part 21 under the action of capillary action and gravity, thereby ensuring the welding effect between the shell 1 and the bushing 2.

[0034] Secondly, in order to reduce the obstruction of the first groove 1011 to the first melting zone 82 by the solder in a flowing state, the position and distance of the bottom of the first groove 1011 and the first end face 401 of the connecting seat 4 are explained as follows:

[0035] In such Figure 1 From the perspective of the longitudinal direction of the control valve, if the bottom of the first slot 1011 is flush with the first end face 401 of the connecting seat 4, the solder will inevitably flow to the first melting zone 82.

[0036] When the bottom of the first groove 1011 is not flush with the first end face 401 of the connecting seat 4, if the bottom of the first groove 1011 is higher than the first end face 401 of the connecting seat 4, there is a second gap between the bottom of the first groove 1011 and the first end face 401 of the connecting seat 4, and the second gap shall not be greater than 0.3mm; if the bottom of the first groove 1011 is lower than the first end face 401 of the connecting seat 4, there is a third gap between the bottom of the first groove 1011 and the first end face 401 of the connecting seat 4, and the third gap shall not be greater than 0.5mm. Based on the above, in actual production operations, the dimensional relationship between the bottom of the first groove 1011 and the first end face 401 of the connecting seat 4 can be appropriately relaxed, thereby ensuring the welding effect within a controllable range.

[0037] like Figure 1-2As shown in Figure 4, this embodiment describes the welding and fixing method of the first connecting pipe 3, bushing 2, and housing 1 of the control valve. The bushing 2 also includes a second connecting part 22, which is connected to the first connecting part 21 through a bend in the middle. The first connecting pipe 3 extends into and is connected to the second connecting part 22. When the second connecting part 22 is welded and fixed to the first connecting pipe 3, a second solder 7 (referring to the base material of the second solder 7, such as a solid solder like a welding ring) is provided between the end of the first connecting pipe 3 near the housing 1 and the outer wall of the housing 1. This allows the first connecting pipe 3 to be connected and fixed to the second connecting part 22 after the solder melts.

[0038] As an example, notch 101 could also be a beveled portion (not shown in the figure), wherein the beveled portion is located in the housing 1 as shown in the figure. Figure 1 From a visual perspective, the upper surface with the beveled portion corresponds to the aforementioned notch 101. This beveled portion serves as the notch 101, but unlike the notch 101, the bottom surface (or bottom surface and sidewall) of the beveled portion is a slope. The lower end of the sloped portion is located at the same position as the opening of the notch 101 facing the second melting zone 81. During the welding process, a portion of the first solder 6 (in a flowable state) can flow through the beveled portion to the first melting zone 82 to weld the shell 1 and the bushing 2. That is, as one embodiment of the notch 101, the beveled portion can also be the notch 101 described in this application.

[0039] In this embodiment, the valve body components of the control valve are preferably welded using furnace welding, although other welding methods can also be used to connect the valve body components. Please refer to... Figure 5 The placement angle of the control valve shown in the diagram during furnace welding will be as follows: Figure 1 The control valve shown in the upright position is tilted so that the housing 1 is tilted toward the first connecting pipe 3. At this tilting angle, the control valve places the second connecting pipe 5, which is connected to the housing 1 in the same direction, above the housing 1. At this tilting angle, the first slot 1011 is located at the low point of the substrate of the first external solder 61 (for example, when it is a solid solder such as a welding ring). This allows the excess solder after the first external solder 61 at the second connecting pipe 5 melts to flow more smoothly and effectively to the first melting zone 82 through the first slot 1011 under the action of capillary action and gravity. This can effectively improve the welding efficiency of the housing 1 and the bushing 2 during furnace welding.

[0040] The manufacturing method of the control valve in this embodiment is described below, including the following steps:

[0041] The rough parts are machined into a housing 1 including side holes 11 and notches 101;

[0042] The connecting seat 4 is placed in the cavity of the housing 1, so that a second fusion zone 81 is formed between the connecting seat 4 and the housing 1. The bushing 2 is placed outside the housing 1. In the circumference of the side hole 11, the bushing 2 includes a first connecting part 21 that fits with the housing 1, so that a first fusion zone 82 is formed between the first connecting part 21 and the housing 1. Before the housing 1 and the bushing 2 are welded, a welding ring is placed on the outer end face of the connecting seat 4, and the welding ring part corresponds to the position of the notch 101.

[0043] The welding ring is melted to form a flowable solder. Part of the solder covers the outer end face of the connector 4, and another part of the solder flows from the second melting zone 81 to the notch 101. The notch 101 connects the second melting zone 81 and the first melting zone 82. When the solder passes through the notch 101, another part of the solder flows from the second melting zone 81 to the first melting zone 82. Another part of the solder covers the wall of the notch 101 and is located in the first melting zone 82.

[0044] After the solder cools, it forms the first solder 6, which welds and fixes the connecting seat 4, the housing 1, and the bushing 2 in one go. In this way, the obstruction between the second melting zone 81 and the first melting zone 82 is removed through the notch 101, allowing the solder to flow between them. This allows some of the solder to act on the outer contour of the saddle surface where the housing 1 and the first connecting part 21 abut, while some of the solder connects the connecting seat 4 and the housing 1, thereby improving the welding efficiency.

[0045] The machining of notch 101 includes machining a first slot 1011 located at the end of housing 1 near the connecting seat 4;

[0046] Before welding the housing 1 and the bushing 2, the second pipe 5 is inserted into the inner hole of the connecting seat 4. The number of welding rings is one. The connecting seat 4 includes a first end face 401 near the second pipe 5. The welding ring is located on the first end face 401 and is sleeved on the outside of the second pipe 5.

[0047] During the welding process, the solder flows through the first slot 1011 to form a first external solder 61, which serves as the first solder 6. A portion of the solder is also located between the outer surface of the second pipe 5 and the inner wall of the connecting seat 4, so that the connecting seat 4, the housing 1, and the bushing 2 are welded and fixed together with the second pipe 5. By simultaneously welding the connecting seat 4 and fixing the second pipe 5 in one operation, the welding efficiency of the valve body components is further improved.

[0048] Please see Figure 6-8 , Figure 6 This is a three-dimensional schematic diagram of a second embodiment of a control valve provided by the present invention before the first connecting pipe is installed; Figure 7 A schematic diagram of the placement angle during welding and its overall cross-sectional view are provided in the second embodiment of the control valve of the present invention; Figure 8 A control valve provided by the present invention Figure 7 Enlarged diagram of point B in the image.

[0049] It should be noted that Figure 7 , 8 The solder in the text refers to the state of the solder ring placed on the connector 4 before welding.

[0050] Example 2 is another embodiment with the same inventive concept as Example 1. It is mainly reflected in the structural design at different positions on the shell 1 where the notch 101 is located. The main difference between this embodiment and Example 1 is that the location of the substrate of the first solder 6 (for example, when it is a solid solder such as a solder ring) is adjusted or changed accordingly by the different positions of the notch 101, and different welding placement angles are used to ensure that the solder between each weld can still flow to each other.

[0051] The structural design and materials of the remaining components in this embodiment are the same as those in Embodiment 1, and will not be described in detail here.

[0052] In this embodiment, the control valve further includes a first connecting pipe 3, and the bushing 2 further includes a second connecting part 22. The second connecting part 22 is welded and fixed to the first connecting pipe 3, or the second connecting part 22 and the first connecting pipe 3 are an integral pipe fitting. The notch 101 includes a second groove 1012, which is opened on the hole wall of the side hole 11 and extends toward the outer contour surface of the first connecting part 21.

[0053] Meanwhile, the connecting seat 4 has a stepped portion 41 on its exterior, which corresponds to the second slot 1012. The stepped portion 41 has a second end face 411, which is the end face of the stepped portion 41 away from the second connector 5. The first solder 6 includes a second external solder 62. A portion of the second external solder 62 covers the second end face 411 of the stepped portion 41, and another portion of the second external solder 62 covers the bottom and wall of the second slot 1012. Yet another portion of the second external solder 62 is located in the first melting zone 82 and the second melting zone 81. This strengthens the connection between the connecting seat 4 and the housing 1, and between the housing 1 and the bushing 2.

[0054] One end of the second connector 5 is connected to the inner hole of the connector 4. The inner hole is provided with an internal solder 63 (referring to the base material of the internal solder 63, such as a solid solder ring) that is connected to the second connector 5. This allows the connector 4 to be welded to the bushing 2 at the same time as the housing 1 welds the connector 4, thereby improving welding efficiency. Furthermore, the second connector 5 can be fixed in the connector 4 after the solder melts, ensuring the reliability of the connection between the second connector 5 and the connector 4.

[0055] In this embodiment, in order to enable the second external solder 62 to better adhere to the first melting zone 82 and to achieve uniform welding between each weld, and in order to enable the base material of the second external solder 62 (for example, when it is a solid solder such as a welding ring) to allow its excess solder to flow towards the bushing under capillary action and gravity during the welding process, the specific range of the relative positional relationship between the second end face 411 of the step portion 41 and the bottom of the second groove 1012 is described as follows.

[0056] Based on the description of the longitudinal direction of the control valve in Embodiment 1, and with Figure 1 The difference is that the second nozzle 5 is located below the housing 1 in this embodiment. Figure 7 The control valve is explained longitudinally from a specific perspective:

[0057] The second slot 1012 is in Figure 7 The bottom plane of the groove, viewed from the same angle, can be set to be flush with the second end face 411 of the stepped portion 41;

[0058] When the bottom of the second groove 1012 and the second end face 411 of the stepped portion 41 are not on the same plane, the first connecting portion 21 does not cover the second groove 1012, and the second groove 1012 is in a state where they are not flush. Figure 7 The bottom plane of the groove is higher than the second end face 411 of the step portion 41 from the perspective. There is a fourth gap between the bottom of the second groove 1012 and the end wall of the step portion 41. In order to allow the solder to flow smoothly, the fourth gap is no more than 0.3mm, so as to avoid the shell 1 from blocking the flow of solder during furnace welding and affecting the welding effect.

[0059] To improve solder flow, the bottom plane of the second groove 1012 is limited to, for example... Figure 7 The state of the second end face 411 below the step portion 41 from the viewing angle, i.e. Figure 8 The bottom plane of the second slot 1012 shown is higher than that of the first connecting part 21. Figure 8 The lowest point from the viewing angle allows the solder to flow more quickly from the step 41 to the first melting zone 82, ensuring the welding effect.

[0060] In this embodiment, the valve body components of the control valve are preferably welded using furnace welding, although other welding methods can also be used to connect the valve body components. Please refer to... Figure 8The control valve shown is positioned at an angle during furnace welding, causing the housing 1 to tilt toward the first connecting pipe 3. At this angle, the valve body component will have the second connecting pipe 5, which is connected to the housing 1 in the same direction, located below the housing 1. At this angle, the second slot 1012 is also located at the lowest point of the substrate of the second external solder 62 (for example, when it is a solid solder such as a welding ring). This allows the excess solder after the second external solder 62 at the connecting seat 4 melts to flow more smoothly and effectively to the first melting zone 82 through the second slot 1012 under the action of capillary action and gravity. This can effectively improve the welding efficiency of the housing 1 and the bushing 2 during furnace welding.

[0061] The manufacturing method of the control valve in this embodiment is described below, including the following steps:

[0062] The rough parts are machined into a housing 1 including side holes 11 and notches 101;

[0063] The connecting seat 4 is placed in the cavity of the housing 1, so that a second fusion zone 81 is formed between the connecting seat 4 and the housing 1. The bushing 2 is placed outside the housing 1. In the circumference of the side hole 11, the bushing 2 includes a first connecting part 21 that fits with the housing 1, so that a first fusion zone 82 is formed between the first connecting part 21 and the housing 1. Before the housing 1 and the bushing 2 are welded, a welding ring is placed on the outer end face of the connecting seat 4, and the welding ring part corresponds to the position of the notch 101.

[0064] The welding ring is melted to form a flowable solder. Part of the solder covers the outer end face of the connector 4, and another part of the solder flows from the second melting zone 81 to the notch 101. The notch 101 connects the second melting zone 81 and the first melting zone 82. When the solder passes through the notch 101, another part of the solder flows from the second melting zone 81 to the first melting zone 82. Another part of the solder covers the wall of the notch 101 and is located in the first melting zone 82.

[0065] After the solder cools, it forms the first solder 6, which welds and fixes the connecting seat 4, the housing 1, and the bushing 2 in one go. In this way, the obstruction between the second melting zone 81 and the first melting zone 82 is removed through the notch 101, allowing the solder to flow between them. This allows some of the solder to act on the outer contour of the saddle surface where the housing 1 and the first connecting part 21 abut, while some of the solder connects the connecting seat 4 and the housing 1, thereby improving the welding efficiency.

[0066] The processing of the notch 101 includes processing a second slot 1012 connected to the side hole 11, the second slot 1012 extending toward the outer contour surface of the first connecting part 21;

[0067] Before welding the housing 1 and the bushing 2, the second pipe 5 is partially inserted into the inner hole of the connecting seat 4. There are two welding rings. The connecting seat 4 includes a step portion 41 that corresponds to the second slot 1012. The step portion 41 has a second end face 411 on the side away from the second pipe 5. One welding ring is located on the second end face 411, and the other welding ring is located between the end of the inner hole and the end face of the second pipe 5.

[0068] During the welding process, the solder of one welding ring flows through the second groove 1012 to form a second external solder 62, which serves as the first solder 6. The solder of the other welding ring is located between the outer surface of the second connecting pipe 5 and the inner wall of the connecting seat 4, so that when the connecting seat 4, the housing 1, and the bushing 2 are welded and fixed, the connecting seat 4 and the second connecting pipe 5 are welded and fixed together. By fixing the second connecting pipe 5 at the same time as welding the connecting seat 4, the welding efficiency of the valve body components is further improved.

[0069] The technical features of the above embodiments can be combined. 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.

[0070] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and controls without departing from the concept of the present invention, and these modifications and controls all fall within the scope of protection of the present invention.

Claims

1. A control valve, characterized in that: The device includes a housing (1), a bushing (2), and a connecting seat (4), wherein the connecting seat (4) is at least partially located in the cavity of the housing (1), the housing (1) includes a side hole (11), and the bushing (2) includes a first connecting portion (21) which is disposed around the side hole (11). The control valve further includes a solder melting zone (8), which includes a first melting zone (82) and a second melting zone (81). The first melting zone (82) is located between the first connecting part (21) and the housing (1), and the second melting zone (81) is located between the connecting seat (4) and the housing (1). The housing (1) also includes a notch (101). In the radial direction of the housing (1), one side of the notch (101) opens toward the second melting zone (81), and the other side of the notch (101) opens... Oriented toward the first melting zone (82), the control valve further includes a first solder (6), a portion of which covers the outer end face of the connecting seat (4), another portion of which covers the wall of the notch (101), and another portion of which is located in the first melting zone (82), so that the housing (1) is welded and fixed to the first connecting part (21), and another portion of which is located in the second melting zone (81), so that the housing (1) is welded and fixed to the connecting seat (4).

2. The control valve according to claim 1, characterized in that: The control valve further includes a first connecting pipe (3), and the bushing (2) further includes a second connecting part (22), wherein the second connecting part (22) is welded and fixed to the first connecting pipe (3) or the second connecting part (22) and the first connecting pipe (3) are an integral pipe fitting; The notch (101) includes a first slot (1011), which is located at the end of the housing (1) near the connector (4). The first solder (6) includes a first external solder (61). The connector (4) includes a first end face (401) near the first slot (1011). A portion of the first external solder (61) covers the first end face (401), and another portion of the first external solder (61) covers the bottom and wall of the first slot (1011). Another portion of the first external solder (61) is located in the first melting zone (82) and the second melting zone (81).

3. The control valve according to claim 2, characterized in that: The control valve also includes a second connector (5), one end of which is connected to the inner hole of the connector (4), and a portion of the first external solder (61) is located between the outer surface of the second connector (5) and the wall of the inner hole.

4. The control valve according to claim 2, characterized in that: The projection surface of the first connecting part (21) in the lateral direction at least partially covers the projection surface of the first slot (1011) in the lateral direction.

5. The control valve according to claim 2, characterized in that: In the longitudinal direction of the control valve, the outer contour surface of the first connecting part (21) is flush with the bottom of the first slot (1011), or the outer contour surface of the first connecting part (21) is lower than the bottom of the first slot (1011), and there is a first gap between the outer contour surface of the first connecting part (21) and the bottom of the first slot (1011), the first gap being no greater than 0.3mm.

6. The control valve according to claim 4 or 5, characterized in that: In the longitudinal direction of the control valve, the bottom of the first slot (1011) is flush with the first end face (401), or the bottom of the first slot (1011) is higher than the first end face (401), and there is a second distance between the bottom of the first slot (1011) and the first end face (401), the second distance being no greater than 0.3mm.

7. The control valve according to claim 4 or 5, characterized in that: In the longitudinal direction of the control valve, the bottom of the first slot (1011) is flush with the first end face (401), or the first end face (401) is higher than the bottom of the first slot (1011), and there is a third distance between the bottom of the first slot (1011) and the first end face (401), the third distance being no greater than 0.5mm.

8. The control valve according to claim 1, characterized in that: The control valve further includes a first connecting pipe (3), and the bushing (2) further includes a second connecting part (22), wherein the second connecting part (22) is welded and fixed to the first connecting pipe (3) or the second connecting part (22) and the first connecting pipe (3) are an integral pipe fitting; The notch (101) includes a second slot (1012), which is connected to the side hole (11) and extends toward the outer contour surface of the first connecting part (21). The connecting seat (4) has a stepped portion (41) on its exterior, the stepped portion (41) corresponding to the second slot (1012), the stepped portion (41) having a second end face (411), the first solder (6) including a second external solder (62), a portion of the second external solder (62) covering the second end face (411), another portion of the second external solder (62) covering the bottom and wall of the second slot (1012), and another portion of the second external solder (62) located in the first melting zone (82) and the second melting zone (81).

9. The control valve according to claim 8, characterized in that: The control valve also includes a second connector (5), one end of which is connected to the inner hole of the connector (4). The inner hole is provided with an internal solder (63) connected to the second connector (5), and the internal solder (63) and the second external solder (62) are formed in one piece.

10. The control valve according to claim 8, characterized in that: In the longitudinal direction of the control valve, the bottom of the second slot (1012) is flush with the second end face (411), or the bottom of the second slot (1012) is higher than the second end face (411), and there is a fourth distance between the bottom of the second slot (1012) and the second end face (411), the fourth distance being no greater than 0.3mm.

11. The control valve according to claim 8, characterized in that: In the longitudinal direction of the control valve, the bottom of the second slot (1012) is flush with the second end face (411), or the second end face (411) is higher than the bottom of the second slot (1012), and the projection surface of the first connecting part (21) in the lateral direction at least partially covers the projection surface of the second slot (1012) in the lateral direction.

12. A method for manufacturing a control valve, characterized in that: Includes the following steps: The rough parts are machined into a housing (1) including side holes (11) and notches (101); The connecting seat (4) is placed in the cavity of the housing (1), so that a second fusion zone (81) is formed between the connecting seat (4) and the housing (1). The bushing (2) is placed outside the housing (1). In the circumference of the side hole (11), the bushing (2) includes a first connecting part (21) that fits against the housing (1), so that a first fusion zone (82) is formed between the first connecting part (21) and the housing (1). Before welding the housing (1) and the bushing (2), the welding ring is placed on the outer end face of the connecting seat (4), and the welding ring part corresponds to the position of the notch (101). The welding ring is melted to form a flowable solder. A portion of the solder covers the outer end face of the connector (4), and another portion of the solder flows from the second melting zone (81) to the notch (101). The notch (101) connects the second melting zone (81) and the first melting zone (82). When the solder passes through the notch (101), another portion of the solder flows from the second melting zone (81) to the first melting zone (82). Another portion of the solder covers the wall of the notch (101), and another portion of the solder is located in the first melting zone (82). After the solder cools, it forms a first solder (6), which welds and fixes the connector (4), the housing (1) and the bushing (2) in one go.

13. The method for manufacturing the control valve according to claim 12, characterized in that: The machining of the notch (101) includes machining a first slot (1011) located at the end of the housing (1) near the connecting seat (4); Before welding the housing (1) and the bushing (2), the second pipe (5) is partially inserted into the inner hole of the connecting seat (4). The number of welding rings is one. The connecting seat (4) includes a first end face (401) near the second pipe (5). The welding ring is located on the first end face (401) and is sleeved on the outside of the second pipe (5). During the welding process, the solder flows through the first slot (1011) to form a first external solder (61) as the first solder (6), and another part of the solder is located between the outer surface of the second pipe (5) and the inner hole wall of the connecting seat (4), so that when the connecting seat (4), the housing (1) and the bushing (2) are welded and fixed, the connecting seat (4) and the second pipe (5) are welded and fixed together.

14. The method for manufacturing the control valve according to claim 12, characterized in that: The processing of the notch (101) includes processing a second slot (1012) connected to the side hole (11), the second slot (1012) extending toward the outer contour surface of the first connecting part (21); Before welding the housing (1) and the bushing (2), the second pipe (5) is partially inserted into the inner hole of the connecting seat (4). There are two welding rings. The connecting seat (4) includes a step portion (41) that partially corresponds to the second slot (1012). The step portion (41) has a second end face (411) on the side away from the second pipe (5). One of the welding rings is located on the second end face (411), and the other welding ring is located between the end of the inner hole and the end face of the second pipe (5). During the welding process, the solder of one of the welding rings flows through the second slot (1012) to form a second external solder (62) as the first solder (6), and the solder of the other welding ring is located between the outer surface of the second pipe (5) and the inner hole wall of the connecting seat (4), so that when the connecting seat (4), the housing (1) and the bushing (2) are welded and fixed, the connecting seat (4) and the second pipe (5) are welded and fixed together.

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