Valve body machining method, ball valve machining method, and ball valve

Abstract

A valve body machining method, a ball valve machining method and a ball valve (100). The valve body machining method comprises the following steps: obtaining a heat-treated profile, the profile being formed by extrusion of a rod-shaped material; cutting and blanking the profile at a preset interval in the direction of length of the profile, and obtaining a plurality of blanks (200), wherein the blanks (200) and the profile have the same cross-sectional shape; and machining the blanks (200) to obtain finished valve bodies (10).

Description

Valve body machining methods, ball valve machining methods, and ball valves

[0001] Related applications

[0002] This application claims priority to Chinese patent applications filed on January 6, 2025, with application number 202510020074.X, entitled "Method for processing valve body, method for processing ball valve and ball valve", and Chinese patent applications filed on January 6, 2025, with application number 202520024891.8, entitled "Ball valve", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of ball valve processing technology, and in particular to a valve body processing method, a ball valve processing method, and a ball valve. Background Technology

[0004] Ball valves are commonly used in air conditioning systems. They consist of a valve body and a valve core, with the valve core rotatably mounted within the valve body. The ball valve controls the flow of refrigerant by rotating the valve core. Currently, ball valve bodies are often formed by stamping followed by machining, resulting in numerous production steps and low processing efficiency in mass production, thus increasing production costs. Summary of the Invention

[0005] Therefore, it is necessary to provide a valve body processing method, a ball valve processing method, and a ball valve.

[0006] This application provides a valve body processing method, which includes the following steps: obtaining a heat-treated profile, the profile being extruded into shape by a rod-shaped material; cutting the profile along its length at preset intervals to obtain several blanks, the blanks having the same cross-sectional shape as the profile; and machining the blanks to obtain the finished valve body.

[0007] In one embodiment, the blank is shot blasted before machining.

[0008] In one embodiment, the blank includes a first end face and a second end face disposed opposite to each other, the first end face and the second end face having the same cross-sectional shape as the profile perpendicular to the length direction.

[0009] In one embodiment, the blank includes a cylindrical part and a part to be processed. The cylindrical part extends in a cylindrical shape and has an inner hole that passes through both ends of the cylindrical part. The part to be processed is connected to the outer wall of the cylindrical part.

[0010] In one embodiment, the step of machining the blank to obtain the finished valve body includes: grinding the first end face and the second end face of the blank; opening a valve stem hole in the blank, the valve stem hole penetrating the side wall of the part to be machined and the cylindrical part, and communicating with the inner hole; and cutting the outer surface of the part to be machined to form the valve head of the valve body.

[0011] In one embodiment, the cutting process in the step of cutting the outer surface of the part to be processed includes turning and / or milling.

[0012] In one embodiment, the part to be processed includes a first processing section, a second processing section, and a third processing section arranged sequentially in a direction away from the cylindrical part, and the third processing section is disposed on a side near the second processing section along the width direction; the step of cutting the outer surface of the part to be processed includes: processing the first processing section to form a base and a limiting boss; processing the second processing section to form a cylindrically extending transition blank, and processing an external thread on the outer surface of the transition blank to form a connecting section; and processing the third processing section to form an anti-rotation protrusion.

[0013] In one embodiment, during the machining of the valve stem hole and the transition blank, the opposite sides of the third machining section are machined into two arc-shaped surfaces, and the width of the third machining section is less than or equal to half the outer diameter of the transition blank.

[0014] In one embodiment, the end face of the limiting boss near one end of the connecting segment is machined into a conical surface or a flat surface.

[0015] In one embodiment, after grinding the first end face and the second end face of the blank, a tapered portion is machined on the first end face and the second end face, and the tapered portion is disposed close to the outer surface of the valve body.

[0016] In one embodiment, the step of machining the blank to obtain the finished valve body includes machining at least one of the first end face and the second end face that are disposed opposite to each other on the cylinder portion to form a pipeline connection end.

[0017] In one embodiment, the profile is made of aluminum alloy or copper.

[0018] This application also provides a ball valve processing method, which includes the following steps: providing a valve body, an end cap, and a connecting pipe, wherein the valve body is processed by the valve body processing method described in any of the above embodiments; fixing the connecting pipe to the end cap by welding; and fixing the end cap to the valve body by welding.

[0019] In one embodiment, the connecting pipe is fixed to the end cap by high-frequency welding; and / or, the end cap is fixed to the valve body by laser welding.

[0020] In one embodiment, a valve is provided, and the valve is assembled to the connector before the connector is welded to the end cap; the step of assembling the valve to the connector includes: forming a mounting hole in the side wall of the connector, inserting the valve into the mounting hole, and fixing it to the connector by welding.

[0021] In one embodiment, the mounting hole is surrounded by a flange, and the valve stem is inserted into the flange and connected to the flange.

[0022] In one embodiment, the valve body includes a main body and a valve head, the valve head having a valve stem hole, and the ball valve processing method further includes: providing a valve stem and a valve core, assembling the valve core into the main body, inserting the valve stem into the main body through the valve stem hole to limit the connection with the valve core; providing a valve cap, and assembling the valve cap into the valve head to seal with the valve head.

[0023] In one embodiment, the number of end caps is one, and the valve stem and the valve core are assembled to the valve body before the end cap is fixed to the valve body by welding; or, the number of end caps is two, and after one of the end caps is fixed to the valve body by welding, the valve stem and the valve core are assembled to the valve body, and then the other end cap is fixed to the valve body by welding.

[0024] In one embodiment, the ball valve manufacturing method further includes: providing a mounting flange and welding the mounting flange to the side wall of the valve body, or locking the mounting flange to the side wall of the valve body using fasteners.

[0025] This application also provides a ball valve, which is manufactured by the ball valve manufacturing method described in any of the above embodiments.

[0026] In one embodiment, the ball valve includes a valve body, an end cap, and a connecting pipe. A valve cavity is formed within the valve body. The end cap is disposed between the valve body and the connecting pipe and is connected to both the valve body and the connecting pipe. A flow hole is formed within the end cap, communicating with both the valve cavity and the connecting pipe. A welding groove is provided at the connection point between the end cap and the valve body. The welding groove includes a first conical surface on the end cap, and / or a second conical surface on the valve body. The end cap and the valve body are welded together via the welding groove.

[0027] In one embodiment, the end cap is fixed to the valve body by laser welding, and / or the end cap is fixed to the connecting pipe by high-frequency welding.

[0028] In one embodiment, the end cap includes a main body and a first connecting portion, the first connecting portion protruding and connected to one axial end of the main body; wherein the first connecting portion is inserted into the valve cavity and connected to the valve body.

[0029] In one embodiment, the outer surface of the valve body is provided with a solder spreading area, the solder spreading area is located near the welding groove and communicates with the welding groove; and / or, the outer surface of the valve body is radially protruding to form a boss, and a clearance area is formed at one end of the boss near the welding groove.

[0030] In one embodiment, the inner diameter of the valve cavity is b, and the outer diameter of the first connecting portion is E, wherein bE≤0.5mm; and / or, the outer diameter of the valve body at the solder spreading area is a, and the outer diameter of the main body is D, wherein |Da|≤1mm; and / or, the width of the solder spreading area is d, and d≥1mm; and / or, the depth of the welding groove is f, and the wall thickness of the valve body is g, wherein 0.1≤f / g≤0.5; and / or, the welding groove includes the first conical surface and the second conical surface, and the included angle formed by the first conical surface and the second conical surface is e, wherein 70°≤e≤120°.

[0031] In one embodiment, the flow hole includes a first orifice section located at one end of the flow hole near the valve cavity; the ball valve further includes a valve core and a seal, the valve core being rotatably mounted in the valve cavity, and the seal being mounted in the first orifice section to seal the valve core and the end cap.

[0032] In one embodiment, the bottom wall of the first hole protrudes axially to form a limiting portion, which abuts against the seal.

[0033] In one embodiment, the limiting portion is configured as a limiting protrusion ring, which extends in a ring shape; or, the limiting portion is configured as a limiting protrusion, wherein there are multiple limiting protrusions, and the multiple limiting protrusions are arranged at intervals along the circumference of the end cap.

[0034] In one embodiment, the outer diameter of the main body is D, the thickness of the main body is G, and G≥D / 20.

[0035] In one embodiment, the flow hole further includes a second section, which is located at one end of the flow hole near the connector, and the connector is inserted into the second section and abuts against the bottom wall of the second section.

[0036] In one embodiment, the end cap further includes a second connecting portion, which protrudes from and connects to the end of the main body away from the first connecting portion, and the second hole segment is at least partially disposed within the second connecting portion; wherein the wall thickness of the connecting pipe is T, the inner diameter of the second hole segment is A, and 0.05mm≤AT≤0.5mm; and / or, the wall thickness of the second connecting portion is B, and 1≤B / T≤2; and / or, the depth of the second hole segment is C, and C / T≥0.8; and / or, the outer diameter of the main body is D, and the height of the second connecting portion protruding from the main body is F, and F≥D / 15.

[0037] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of the structure of a blank part according to an embodiment of this application.

[0040] Figure 2 is a schematic diagram of the valve body of an embodiment provided in this application.

[0041] Figure 3 is a schematic diagram of the structure of a ball valve according to an embodiment of this application.

[0042] Figure 4 is a cross-sectional view of a ball valve according to an embodiment of this application.

[0043] Figure 5 is a partial schematic diagram of a valve body according to an embodiment provided in this application.

[0044] Figure 6 is a schematic diagram of the structure of a ball valve according to an embodiment of this application.

[0045] Figure 7 is a cross-sectional view of a ball valve according to an embodiment of this application.

[0046] Figure 8 is a cross-sectional view of a portion of the structure of a ball valve according to an embodiment of this application.

[0047] Figure 9 is a cross-sectional view of an end cap according to an embodiment provided in this application.

[0048] The symbols in the diagram represent the following meanings: 100, ball valve; 10, valve body; 101, receiving cavity; 102, valve stem hole; 103, mounting groove; 104, second conical surface; 11, main body; 111, conical surface; 1001, welding groove; 12, valve head; 1201, clearance area; 121, base; 122, limiting boss; 123, connecting section; 124, anti-rotation protrusion; 13, solder spreading area; 20, end cap; 201, flow hole; 2011, first hole section; 2012, second hole section; 202, first conical surface; 21, end cap main body; 22. First connecting part; 23. Second connecting part; 24. Limiting part; 30. Connecting pipe; 301. Mounting hole; 31. Flanged edge; 40. Valve core; 50. Valve stem; 51. Limiting rod; 60. Seal; 70. Valve nozzle; 71. Valve core; 72. Valve cap; 80. Valve cap; 81. Sealing ring; 90. Mounting flange; 200. Blank; 201. First end face; 202. Second end face; 203. Inner hole; 210. Cylinder part; 220. Part to be processed; 221. First processing section; 222. Second processing section; 223. Third processing section. Detailed Implementation

[0049] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0050] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0054] Ball valves are commonly used in air conditioning systems. They consist of a valve body and a valve core, with the valve core rotatably mounted within the valve body. The ball valve controls the flow of refrigerant by rotating the valve core. Currently, ball valve bodies are often formed by stamping followed by machining, resulting in numerous production steps and low processing efficiency in mass production, thus increasing production costs.

[0055] Please refer to Figures 1-5. This application provides a ball valve 100, which includes a valve body 10, a valve stem 50, and a valve core 40. The valve body 10 includes a main body 11 and a valve head 12. A receiving cavity 101 is provided in the main body 11. The valve core 40 is rotatably installed in the receiving cavity 101. A valve stem hole 102 is provided on the valve head 12, penetrating the side wall of the valve head 12 and the main body 11, so that the valve stem hole 102 and the receiving cavity 101 are connected. This facilitates the insertion of the valve stem 50 into the receiving cavity 101 through the valve stem hole 102 to achieve a mating connection with the valve core 40. In this way, the valve stem 50 can drive the valve core 40 to rotate in the receiving cavity 101, thereby achieving the shut-off and conduction of refrigerant flow.

[0056] To prevent external impurities from entering the receiving cavity 101 through the valve stem hole 102, the ball valve 100 also includes a valve cap 80, which is fixed by threaded engagement with the valve head 12 and has a sealing engagement with the valve head 12.

[0057] As shown in Figures 2 and 5, the valve head 12 includes a base 121, a limiting boss 122, and a connecting section 123. The base 121 is connected to the outer wall of the main body 11, serving to enhance the overall structural strength. Along the radial direction of the main body 11, the limiting boss 122 and the connecting section 123 are sequentially arranged and connected. The connecting section 123 has external threads for threaded engagement with the valve cap 80 to lock the valve cap 80. Furthermore, as the valve cap 80 is locked, it engages with the limiting boss 122 to achieve a seal.

[0058] Referring to Figure 2, in one embodiment, the end face of the limiting boss 122 near the connecting section 123 is configured as a conical surface. In this case, during the locking process of the valve cap 80, the end of the valve cap 80 can directly abut against the conical surface on the limiting boss 122, thereby achieving a hard seal between the valve cap 80 and the limiting boss 122. Referring to Figure 4, in another embodiment, an installation groove 103 can also be provided at the connection between the connecting section 123 and the limiting boss 122, and a sealing ring 81 can be installed in the installation groove 103. In this way, during the locking process of the valve cap 80, a soft seal is achieved between the valve cap 80 and the limiting boss 122 through the sealing ring 81. In this case, the end face of the limiting boss 122 near the connecting section 123 can be configured as a conical surface or as a plane.

[0059] Furthermore, the valve head 12 also includes an anti-rotation protrusion 124, which is connected to the end of the connecting section 123 away from the main body 11. A limiting rod 51 is connected and passes through the valve stem 50, and the limiting rod 51 protrudes from both ends of the valve stem 50 along its own radial direction. During the rotation of the valve stem 50, the limiting rod 51 can abut against the anti-rotation protrusion 124 along the circumference of the valve stem 50 to limit its movement, thereby controlling the rotation angle of the valve stem 50 and the valve core 40 and improving the control accuracy of the ball valve 100. Since the valve core 40 can usually change the cut-off and conduction state of the refrigerant flow by rotating 90°, the anti-rotation protrusion 124 can be set as a quarter-circular ring structure, which satisfies the rotation needs of the valve core 40 and avoids obstructing the rotation of the valve stem 50 and the valve cover.

[0060] Of course, in other embodiments, the circumferential length of the anti-rotation protrusion 124 can also be reasonably set according to actual needs.

[0061] In one embodiment, as shown in Figures 3 and 4, the ball valve 100 further includes an end cap 20 and a connecting pipe 30. One end of the end cap 20 is inserted into the receiving cavity 101 and connected to the valve body 10, while the connecting pipe 30 is inserted into the other end of the end cap 20 and connected to it. A sealing element 60 is provided between the end cap 20 and the valve core 40 to seal the connection between them, thereby improving the sealing performance during refrigerant flow.

[0062] In this embodiment, there are two end caps 20 and two connecting pipes 30, and the two end caps 20 are respectively located at opposite ends of the valve body 10, and each connecting pipe 30 is connected to a corresponding end cap 20.

[0063] In other embodiments, the number of end caps 20 may also be set to one and connected to one end of the valve body 10. In this case, the other end of the valve body 10 can be processed accordingly to realize the direct connection between the valve body 10 and the connecting pipe 30.

[0064] To facilitate the connection between the end cap 20 and the valve body 10, taking the connection of both ends of the valve body 10 to the corresponding end cap 20 as an example, each of the opposite end faces of the valve body 10 is provided with a conical surface 111, which is located close to the outer surface of the valve body 10. Thus, after the valve body 10 abuts against the end cap 20, the conical surface 111 forms a groove structure with the end cap 20 that is recessed towards the interior of the valve body 10. This groove structure ensures the weld penetration between the valve body 10 and the end cap 20, improving weld reliability and strength. Furthermore, after welding, the groove structure formed by the conical surface 111 is filled by the solder or the molten portion on the valve body 10 and the end cap 20, forming a planar structure that is more aesthetically pleasing.

[0065] Furthermore, along the axial direction of the receiving cavity 101 and towards the end face of the valve body 10, the cross-sectional area of ​​the conical portion 111 gradually decreases. A corresponding conical surface can also be formed on the end cap 20, which, together with the conical portion 111 on the valve body 10, forms a V-groove structure, further improving the reliability of the weld. Here, the valve body 10 and the end cap 20 can be laser welded. It should be noted that when using laser welding, no welding rod is needed; the conical portion 111 can be directly filled by partially melting the valve body 10 and the end cap 20. In this case, the connection between the valve body 10 and the end cap 20 can form a flat surface, ensuring weld strength and improving aesthetics.

[0066] Of course, other welding methods can also be used, such as flame welding or furnace welding. When using other welding methods, welding rods can be used for welding. After the welding rods melt, they fill the conical part 111. At this time, after the solder re-solidifies, it will bulge out of the conical part 111 and accumulate around it.

[0067] [Correction 29.01.2026 based on Rule 91] Please refer to Figures 6-9. A flow hole 201 is provided inside the end cover 20, which connects to the receiving cavity 101 and the connecting pipe 30 respectively. Furthermore, in order to improve the welding quality and welding stability of the ball valve welding structure, a welding groove 1001 is provided at the connection between the end cover 20 and the valve body 10.

[0068] In this embodiment, the welding groove 1001 includes a first conical surface 202 disposed on the end cap 20, and / or, the welding groove 1001 includes a second conical surface 104 disposed on the valve body 10, and the end cap 20 and the valve body 10 are welded and fixed through the welding groove 1001. Thus, the opening of the welding groove 1001 increases the actual welding area between the valve body 10 and the end cap 20, thereby improving welding strength and welding stability. Furthermore, after welding is completed, the solder or the partial melting of the valve body 10 and the end cap 20 will fill the welding groove 1001, thereby ensuring that the joint between the valve body 10 and the end cap 20 is a planar structure, improving structural stability and preventing damage to welding strength due to vibration or other operating conditions, while also being more visually appealing.

[0069] In other words, in this embodiment, the conical surface 111 is specifically configured as a second conical surface 104.

[0070] In this embodiment, as shown in FIG8, the welding groove 1001 is configured as a V-shaped groove, that is, the welding groove 1001 is formed by the first conical surface 202 on the end cover 20 and the second conical surface 104 on the valve body 10.

[0071] In other embodiments, the welding groove 1001 can also be formed by the first conical surface 202 on the end cap 20 surrounding the end face of the valve body 10, or by the second conical surface 104 on the valve body 10 surrounding the end face of the end cap body 21, forming a semi-V-shaped structure. The specific arrangement can be reasonably set according to the actual situation. Here, both the first conical surface 202 and the second conical surface 104 can be formed by machining.

[0072] In one embodiment, the end cap 20 is welded to the valve body 10 by laser welding, and the end cap 20 is welded to the connecting pipe 30 by high-frequency welding.

[0073] Understandably, the high-frequency welding method used to connect the end cap 20 and the connecting pipe 30 ensures uniform heating of the end cap 20, preventing heat deformation and guaranteeing the concentricity of the end cap 20 and valve body 10. Furthermore, traditional welding methods can lead to reduced strength of connected components due to "over-aging" in the heat-affected zone. High-frequency welding, with its uniform heat distribution, effectively strengthens the components during the welding process, mitigating strength loss and ensuring material strength. Simultaneously, the laser welding method connecting the end cap 20 and valve body 10 effectively reduces the impact of welding heat on the valve body 10 and its internal components due to its high energy density, small heat-affected zone, and fast welding speed. This ensures the normal operation of the ball valve 100. Moreover, this welding method allows for a more compact and lightweight design of the ball valve 100.

[0074] For example, the welding heat can have an adverse effect on the internal components of the valve body 10 (such as the seal 60), which can easily cause thermal deformation of the seal 60, thereby causing the seal 60 to fail.

[0075] In other embodiments, the valve body 10, end cap 20, and connecting pipe 30 can also be fixed by welding methods such as furnace welding or flame welding. It should be noted that when laser welding is used, no welding rod is needed. The valve body 10 and end cap 20 are partially melted and fill the welding groove 1001. In this case, the connection between the valve body 10 and end cap 20 can form a flat surface, ensuring welding strength and improving aesthetics. When other welding methods are used, welding rods can be used. After the welding rods melt, they fill the welding groove 1001. In this case, the solder will protrude from the welding groove 1001 and accumulate around it, for example, it will accumulate in the solder spreading area 13 described below.

[0076] In one embodiment, the ball valve 100 is made of aluminum alloy. Compared to traditional valve-making materials (such as brass), aluminum alloy is not only lighter but also cheaper, effectively reducing the cost of the ball valve 100. Furthermore, for the same weight, the aluminum ball valve 100 can have a greater wall thickness than the brass ball valve 100, thereby effectively improving the structural stability of the ball valve 100. Of course, in other embodiments, the ball valve 100 may also be made of brass.

[0077] In one embodiment, as shown in Figures 8 and 9, the end cap 20 includes an end cap body 21 and a first connecting portion 22, the first connecting portion 22 protruding and connected to one axial end of the end cap body 21. The first connecting portion 22 is inserted into the receiving cavity 101 and connected to the valve body 10. The insertion connection between the first connecting portion 22 and the valve body 10 improves the coaxiality of the end cap 20 and the valve body 10, thereby enhancing the laser welding effect between the end cap 20 and the valve body 10.

[0078] Furthermore, the inner diameter of the receiving cavity 101 is b, and the outer diameter of the first connecting part 22 is E, where bE ≤ 0.5 mm. This arrangement further ensures the coaxiality of the end cap 20 and the valve body 10, thereby improving the laser welding effect between the end cap 20 and the valve body 10. Additionally, the inner wall of the receiving cavity 101 and the outer wall of the first connecting part 22 form a clearance fit or an interference fit, which reduces the difficulty of insertion or further improves the reliability of the connection.

[0079] In one embodiment, bE ≤ 0.1 mm. For example, the difference between b and E can be set to 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm or 0.1 mm, etc., which will not be listed here.

[0080] Furthermore, the included angle formed by the first conical surface 202 and the second conical surface 104 is e, and 70°≤e≤120°. At the same time, the depth of the welding groove 1001 is f, and the wall thickness of the valve body 10 is g, and 0.1≤f / g≤0.5 is satisfied. In this way, the laser welding penetration can be increased, the laser reflection of aluminum alloy can be reduced, the laser absorption can be improved, the laser welding porosity can be reduced, and the laser welding surface can be increased, thereby effectively improving the welding reliability and reducing the welding difficulty.

[0081] In one embodiment, as shown in FIG8, the outer surface of the valve body 10 is provided with a solder spreading area 13, which is located near and communicates with the welding groove 1001. The solder spreading area 13 is used to spread solder, so that the weld has a sufficient weld width.

[0082] The width of the solder spreading area 13 is d, and d ≥ 1mm. This effectively ensures the weld width of the laser welding, thereby improving weldability. Optionally, the value of d can be 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, or 2mm, etc., which are not listed here.

[0083] Furthermore, the outer diameter of the valve body 10 at the solder spreading area 13 is a, and the outer diameter of the end cap main body 21 is D, where |Da|≤1mm. That is, the outer diameter of the end cap main body 21 can be greater than or less than the outer diameter of the valve body 10 at the solder spreading area 13. However, the difference between the two must be within 1mm to reduce the height difference on both sides of the welding groove 1001, thereby improving the weldability of laser welding.

[0084] To ensure the structural strength of the end cap 20, in one embodiment, the thickness of the end cap body 21 is G, and G≥D / 20. This ensures the thickness of the end cap body 21, which is beneficial for improving the strength of the end cap body 21 and the connecting pipe 30 of the end cap 20.

[0085] In one embodiment, as shown in FIG6, a valve head 12 is formed on the outer surface of the valve body 10 in a radial direction. The valve head 12 can improve the structural strength of the mating part between the valve body 10 and the valve stem 50. The valve stem 50 extends into the receiving cavity 101 and is connected to the valve core 40 so that the valve core 40 can be rotated in the receiving cavity 101 by the rotation of the valve stem 50.

[0086] Furthermore, a clearance area 1201 is formed at the end of the valve head 12 near the welding groove 1001 to prevent the valve head 12 from affecting the laser welding wire feeding, thereby reducing the welding difficulty and improving the welding efficiency.

[0087] In one embodiment, as shown in Figures 7 and 8, the flow hole 201 includes a first hole segment 2011, which is located at one end of the flow hole 201 near the receiving cavity 101. A seal 60 is installed within the first hole segment 2011 to seal the connection between the valve core 40 and the end cap 20. This facilitates the assembly of the seal 60 and improves the sealing effect between the valve core 40 and the end cap 20.

[0088] Since the valve core 40 rotates during operation, and the valve core 40 and the seal 60 are in a tight contact when sealing, there is a risk that the valve core 40 may cause the seal 60 to move due to friction. Therefore, in order to avoid the seal 60 being dragged by the valve core 40 and thus affecting the sealing effect, in one embodiment, the bottom wall of the first hole section 2011 protrudes axially to form a limiting part 24. The limiting part 24 abuts against the seal 60, thereby increasing the contact area between the inner wall of the first hole section 2011 and the seal 60, which can effectively reduce the probability of the seal 60 moving.

[0089] Specifically, in one embodiment, the limiting portion 24 is configured as a limiting protrusion ring, which extends in a ring shape. This prevents the seal 60 from being dragged by the valve core 40, ensuring the sealing performance of the seal 60.

[0090] In another embodiment, the limiting portion 24 can also be configured as a limiting protrusion, with multiple limiting protrusions arranged at intervals along the circumference of the end cover 20. This also effectively prevents the seal 60 from being dragged by the valve core 40, ensuring the sealing performance of the seal 60.

[0091] In one embodiment, as shown in Figures 8 and 9, the flow hole 201 further includes a second hole segment 2012. The second hole segment 2012 is located at one end of the flow hole 201 near the connector 30, and the connector 30 is inserted into the second hole segment 2012 and abuts against the bottom wall of the second hole segment 2012. This helps to improve the connection strength between the connector 30 and the end cap 20 and facilitates subsequent welding.

[0092] In one embodiment, to facilitate the insertion of the connector 30 into the second hole 2012, the wall thickness of the connector 30 is T, the inner diameter of the second hole 2012 is A, and 0.05mm≤AT≤0.5mm. This facilitates the insertion of the connector 30 and ensures the coaxiality between the connector 30 and the end cap 20, thereby improving the strength and reliability of the high-frequency welding.

[0093] Optionally, the value of AT can be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm, etc., which will not be listed here.

[0094] Furthermore, the end cap 20 also includes a second connecting portion 23, which protrudes and connects to the end of the end cap body 21 away from the first connecting portion 22. The second hole segment 2012 is at least partially provided in the second connecting portion 23. That is, the outer diameter of the second connecting portion 23 is smaller than the outer diameter of the end cap body 21, which can reduce the material used in the end cap 20 and reduce costs.

[0095] To ensure the reliability of the connection between the second connecting part 23 and the second hole section 2012 and the pipe 30, in one embodiment, the wall thickness of the second connecting part 23 is B, and 1≤B / T≤2, so as to improve the strength of the second connecting part 23, prevent it from melting due to heat during the welding process, and thus improve the weldability of high frequency welding.

[0096] Furthermore, in one embodiment, the height of the second connecting portion 23 protruding from the end cap body portion 21 is F, and F ≥ D / 15. This increases the height of the second connecting portion 23, thereby ensuring its strength and further preventing it from melting during welding, thus improving the weldability of high-frequency welding.

[0097] Furthermore, in one embodiment, the depth of the second hole segment 2012 is C, and C / T≥0.8, thus ensuring the length of the pipe 30 inserted into the end cap 20, improving the reliability of the connection between the two, and thereby improving the welding strength of the high-frequency welding.

[0098] Furthermore, in one embodiment, the ball valve 100 further includes a valve stem 70 for charging refrigerant into the connecting pipe 30, wherein the valve stem 70 can be connected to either of the two connecting pipes 30. In one embodiment, a valve core 71 is installed inside the valve stem 70, and a valve cap 72 is threadedly connected to the outer periphery of the valve stem 70. The valve cap 72 can prevent external impurities from entering the connecting pipe 30 through the valve stem 70, further ensuring the reliability of the ball valve 100 during operation.

[0099] Furthermore, the connecting pipe 30 has a mounting hole 301, into which the valve stem 70 is inserted and connected to the connecting pipe 30. To improve the reliability of the valve stem 70 installation, a flange 31 is provided around the periphery of the mounting hole 301, into which the valve stem 70 can be inserted and connected. The flange 31 can be turned outwards or inwards relative to the connecting pipe 30. Alternatively, the flange 31 can be omitted, depending on the wall thickness of the connecting pipe 30.

[0100] For example, if the wall thickness of the connecting pipe 30 is ≥1.5mm, a reliable connection with the valve stem 70 can be ensured by the wall thickness of the connecting pipe 30, and the flange 31 is not required, thus reducing costs. If the wall thickness of the connecting pipe 30 is <1.5mm, the connecting pipe 30 is relatively thin, and there is a risk of deformation during installation. In this case, the flange 31 can greatly increase the structural strength and ensure the reliability of the connection.

[0101] To enable the ball valve 100 to be installed in an air conditioning system, in one embodiment, the ball valve 100 further includes a mounting flange 90, which can be welded to the side wall of the valve body 10, or a hole can be drilled in the side wall of the valve body 10 and the mounting flange 90 can be locked to the side wall of the valve body 10 by fasteners.

[0102] This application also provides a method for processing a valve body 10, wherein the valve body 10 of the ball valve 100 is formed by processing the valve body 10 by the method. Specifically, the method for processing the valve body 10 includes steps S100, S200, and S300.

[0103] S100. Obtain the heat-treated profile, which is formed by extrusion of a rod-shaped material.

[0104] S200. Cut the profile along its length at a preset interval to obtain several blanks 200. The blanks 200 have the same cross-sectional shape as the profile.

[0105] S300, the blank 200 is machined to obtain the finished valve body 10.

[0106] In the processing of the valve body 10 of this application, heat-treated and strengthened profiles can be directly purchased from the raw material supplier. Compared with the traditional method of mass-producing valve body 10 blanks and then performing heat treatment on each blank, this application eliminates the need for heat treatment, saving heat treatment space and making transportation more convenient. Furthermore, the processing only requires blanking and machining steps to obtain the valve body 10, greatly reducing the number of processing steps and minimizing equipment, space, and manpower investment, thereby significantly reducing production costs and improving production efficiency.

[0107] Furthermore, the blank 200 includes a first end face 201 and a second end face 202 disposed opposite to each other, and the first end face 201 and the second end face 202 have the same cross-sectional shape as the profile perpendicular to the length direction. Here, the first end face 201 and the second end face 202 can respectively abut and cooperate with the two end caps 20 after subsequent processing to adapt to the structure in which end caps 20 are provided at both ends.

[0108] In one embodiment, as shown in FIG1, the blank 200 includes a cylindrical portion 210 and a portion to be processed 220. The cylindrical portion 210 extends in a cylindrical shape and has an inner hole 203 extending through both ends of the cylindrical portion 210. The portion to be processed 220 is connected to the outer side wall of the cylindrical portion 210. As shown in FIG2, the cylindrical portion 210 forms the main body 11 of the valve body 10 during subsequent machining, and the inner hole 203 forms a receiving cavity 101. The portion to be processed 220 forms the valve head 12 of the valve body 10 during subsequent machining. Furthermore, since the blank 200 is obtained directly from the profile by cutting, the purchased profile has the same cross-sectional shape as the blank 200. That is, the raw material manufacturer directly extrudes the initial structure of the inner hole 203 when extruding the profile. Thus, after cutting, there is no need to perform additional machining on the blank 200 to form the inner hole 203, which can greatly reduce the amount of cutting (by 80% compared to the traditional process) and thus greatly improve the processing efficiency.

[0109] Furthermore, the valve body 10 processing method also includes the following step: shot blasting the blank 200. The shot blasting is performed before machining the blank 200 to improve its fatigue fracture resistance, reduce the probability of fatigue failure, and thus improve the reliability of the blank 200 during machining.

[0110] In one embodiment, the step of machining the blank 200 to obtain the finished valve body 10 includes S310, S320, and S330.

[0111] S310. Grinding is performed on the first end face 201 and the second end face 202 of the blank 200.

[0112] S320. A valve stem hole 102 is opened on the blank 200. The valve stem hole 102 penetrates the side wall of the part to be processed 220 and the cylindrical part 210, and communicates with the inner hole 203.

[0113] S330, the outer surface of the part to be machined 220 is cut to form the valve head 12 of the valve body 10.

[0114] Step S310 ensures the flatness of the two ends of the finished valve body 10, thereby improving the fit between the valve body 10 and the end cap 20 and ensuring the reliability of the connection. During this process, the cylindrical part 210 basically forms the main body 11 of the finished valve body 10 without additional processing, greatly improving processing efficiency.

[0115] In one embodiment, the cutting process in step S330 includes turning and / or milling. That is, a lathe and / or a milling machine can be selected to cut the outer surface of the part to be machined 220, reducing the machining difficulty and improving machining efficiency.

[0116] In one embodiment, as shown in FIG1, the processing section 220 includes a first processing section 221, a second processing section 222, and a third processing section 223 arranged sequentially in the direction away from the cylinder section 210, and the third processing section 223 is disposed on the side near the second processing section 222 along the width direction. Here, the first processing section 221 is processed into the base 121 and the limiting boss 122 of the valve head 12 on the finished valve body 10, the second processing section 222 is processed into the connecting section 123 of the valve head 12 on the finished valve body 10, and the third processing section 223 is processed into the anti-rotation protrusion 124 of the valve head 12 on the finished valve body 10.

[0117] Furthermore, the steps for cutting the outer surface of the part to be machined 220 include S331, S332, and S333.

[0118] The first processing section 221 is processed to form the base 121 and the limiting boss 122.

[0119] S332. The second processing section 222 is processed to form a cylindrical extended transition blank, and an external thread is processed on the outer surface of the transition blank to form a connecting section 123.

[0120] S333, The third processing section 223 is processed to form the anti-rotation protrusion 124.

[0121] In the process of machining the valve stem hole 102 and the transition blank, the opposite sides of the third machining section 223 are machined into two arc-shaped surfaces, and the width of the third machining section 223 is less than or equal to half the outer diameter of the transition blank. Since the third machining section 223 extends in a long strip after cutting, and its width is less than or equal to half the outer diameter of the transition blank, after machining the valve stem hole 102 and the transition blank, the third machining section 223 forms a semi-circular extended machining blank. At this time, the arc length of the machining blank is still greater than the preset length of the anti-rotation protrusion 124. Then, through milling in step S333, only about a quarter of the ring on the machining blank needs to be removed to obtain the finished anti-rotation protrusion 124 of the preset size. Compared to the complete ring structure formed by the wide third machining section 223, this embodiment can reduce the removal of half of the ring, which not only improves processing efficiency but also effectively reduces the material cost of the profile.

[0122] Furthermore, in step S331, the end face of the limiting boss 122 near the connecting section 123 can be machined into a conical surface or a flat surface to match the sealing form of the valve cover.

[0123] Furthermore, after grinding the first end face 201 and the second end face 202 of the blank 200, a tapered surface 111 is machined on the first end face 201 and the second end face 202, and the tapered surface 111 is located close to the outer surface of the valve body 10. This facilitates the subsequent welding between the valve body 10 and the end cover 20.

[0124] In summary, through the above processing steps, the processed valve body 10 can be adapted to a structure in which end caps 20 are provided at both ends. Of course, in step S300, at least one of the first end face 201 and the second end face 202 of the cylindrical part 210 that are disposed opposite each other can be processed to form a pipeline connection end, thereby adapting to a structure in which one end of the valve body 10 is directly connected to the pipe 30.

[0125] In one embodiment, the profile is made of aluminum alloy, which is cheaper than traditional brass, thus reducing costs. Furthermore, aluminum alloy is lighter, effectively reducing the weight of the ball valve 100 after processing to form the valve body 10, achieving weight reduction. At the same weight, the aluminum alloy ball valve 100 can have a greater wall thickness than the brass ball valve 100, thereby increasing the structural stability of the ball valve 100.

[0126] Furthermore, conventional aluminum alloys require forging, which is problematic due to their narrow forging temperature range, tendency to stick to the die, and poor fluidity. Forging results in high deformation rates and a high failure rate. Moreover, forging typically requires dies and presses, making it difficult. In this embodiment, however, the aluminum alloy profile is extruded and then machined to form the valve body 10, thus avoiding the forging process and significantly reducing the scrap rate.

[0127] Of course, in other embodiments, the profile material can also be copper, which is not limited here.

[0128] This application also provides a method for processing a ball valve 100. The method for processing the ball valve 100 described above includes the following steps: providing a valve body 10, an end cap 20, and a connecting pipe 30. The valve body 10 is processed by the valve body 10 processing method of any of the above embodiments; fixing the connecting pipe 30 to the end cap 20 by welding; and fixing the end cap 20 to the valve body 10 by welding.

[0129] In one embodiment, the connecting pipe 30 is welded to the end cap 20 by high-frequency welding. In another embodiment, the end cap 20 is welded to the valve body 10 by laser welding.

[0130] The end cap 20 and the connecting pipe 30 are connected by high-frequency welding, which ensures uniform heating of the end cap 20, preventing heat deformation and guaranteeing the concentricity of the end cap 20 and the valve body 10. Furthermore, traditional welding methods can lead to reduced strength of connected components due to "over-aging" in the heat-affected zone. High-frequency welding generates uniform heat, effectively strengthening the components during the welding process and mitigating this strength reduction, thus ensuring material strength. Simultaneously, the end cap 20 and the valve body 10 are connected by laser welding. Due to the high energy density, small heat-affected zone, and fast welding speed of laser welding, the impact of welding heat on the valve body 10 and its internal components is effectively reduced, ensuring the normal operation of the ball valve 100. Moreover, these welding methods allow for a more compact and lightweight design of the ball valve 100.

[0131] In other embodiments, the valve body 10, end cap 20 and pipe 30 can also be fixed by welding methods such as flame welding or furnace welding.

[0132] Furthermore, the ball valve 100 processing method also includes the step of: providing a valve stem 70, and assembling the valve stem 70 onto the pipe fitting 30 before welding the pipe fitting 30 to the end cap 20. The step of assembling the valve stem 70 onto the pipe fitting 30 includes: opening a mounting hole 301 on the side wall of the pipe fitting 30, inserting the valve stem 70 into the mounting hole 301, and fixing it to the pipe fitting 30 by welding. High-frequency welding can be used as the welding method.

[0133] This facilitates the connection between the valve stem 70 and the connecting pipe 30, reduces the probability of deformation of the connecting pipe 30 and the valve stem 70, and at the same time, assembling the valve stem 70 first can avoid the vibration or heat during the connection of the valve stem 70 and the connecting pipe 30 from having an adverse effect on the end cover 20, thereby improving the overall reliability of the ball valve 100.

[0134] In summary, the end cap 20, the connecting pipe 30, and the valve stem 70 are welded together to form a single unit.

[0135] In one embodiment, the ball valve 100 processing method further includes the steps of: providing a valve stem 50 and a valve core 40, assembling the valve core 40 into the main body 11, and inserting the valve stem 50 into the main body 11 through the valve stem hole 102 to limit the connection with the valve core 40.

[0136] When there is only one end cap 20, the valve stem 50 and valve core 40 can be assembled onto the valve body 10 before the end cap 20 is fixed to the valve body 10 by welding.

[0137] When there are two end caps 20, after one end cap 20 is fixed to the valve body 10 by welding, the valve stem 50 and valve core 40 are assembled to the valve body 10, and then the other end cap 20 is fixed to the valve body 10 by welding.

[0138] Furthermore, the ball valve 100 manufacturing method also includes the steps of: providing a valve cap 80 and assembling the valve cap 80 onto the valve head 12 to achieve a sealing fit with the valve head 12. Here, the assembly step of the valve cap 80 is performed after the assembly step of the valve stem 50.

[0139] In one embodiment, the ball valve 100 processing method further includes the steps of: providing a seal 60 and installing the seal 60 inside the end cover 20 before welding the end cover 20 to the valve body 10 by laser welding.

[0140] In one embodiment, the ball valve 100 processing method further includes the steps of: providing a valve core 71 and a valve cap 72, first assembling the valve core 71 into the valve stem 70, and then fitting the valve cap 72 onto the valve stem 70. Here, the assembly step of the valve core 71 and the valve cap 72 is performed after the welding step of the valve stem 70 to avoid the welding from adversely affecting the valve core 71 and the valve cap 72.

[0141] In one embodiment, the ball valve 100 manufacturing method further includes the steps of: providing a mounting flange 90 and fixing the mounting flange 90 to the side wall of the valve body 10, wherein the mounting flange 90 may be welded or locked to the side wall of the valve body 10 by fasteners.

[0142] Here, the assembly steps of each component can be reasonably interchanged. Taking valve cap 72 and valve cap 80 as examples, valve cap 72 can be assembled first, valve cap 80 can be assembled first, or valve cap 72 and valve cap 80 can be assembled simultaneously. It should also be noted that all the components mentioned above, except for valve body 10, can be manufactured using traditional processes, which will not be described in detail here.

[0143] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A valve body processing method, characterized in that, Includes the following steps: Obtain a heat-treated profile, which is formed by extrusion of a rod-shaped material; Along the length of the profile, the profile is cut at a preset interval to obtain several blanks, the blanks having the same cross-sectional shape as the profile. The blank is machined to obtain the finished valve body.

2. The valve body processing method according to claim 1, wherein, Before machining the blank, the blank is shot blasted.

3. The valve body processing method according to claim 1, wherein, The blank includes a first end face and a second end face disposed opposite to each other, and the first end face and the second end face have the same cross-sectional shape as the profile perpendicular to the length direction.

4. The valve body processing method according to claim 3, wherein, The blank includes a cylindrical part and a part to be processed. The cylindrical part extends in a cylindrical shape and has an inner hole that passes through both ends of the cylindrical part. The part to be processed is connected to the outer wall of the cylindrical part.

5. The valve body processing method according to claim 4, wherein, The steps of machining the blank to obtain the finished valve body include: The first end face and the second end face of the blank are ground. A valve stem hole is formed in the blank, the valve stem hole penetrates the side wall of the part to be processed and the cylindrical part, and communicates with the inner hole; The valve head of the valve body is formed by cutting the outer surface of the part to be processed.

6. The valve body processing method according to claim 5, wherein, In the step of cutting the outer surface of the part to be processed, the cutting process includes turning and / or milling.

7. The valve body processing method according to claim 6, wherein, The part to be processed includes a first processing section, a second processing section and a third processing section arranged sequentially in the direction away from the cylindrical part, and the third processing section is disposed on the side near the second processing section along the width direction; The step of cutting the outer surface of the part to be processed includes: The first processing section is processed to form a base and a limiting boss; The second processing section is processed to form a cylindrical extended transition blank, and external threads are machined on the outer surface of the transition blank to form a connecting section; The third processing section is processed to form an anti-rotation protrusion.

8. The valve body processing method according to claim 7, wherein, During the machining of the valve stem hole and the transition blank, the opposite two sides of the third machining section are machined into two arc-shaped surfaces, and the width of the third machining section is less than or equal to half the outer diameter of the transition blank.

9. The valve body processing method according to claim 7, wherein, The end face of the limiting boss near the connecting section is machined into a conical surface or a flat surface.

10. The valve body processing method according to claim 5, wherein, After grinding the first end face and the second end face of the blank, a tapered surface is machined on the first end face and the second end face, and the tapered surface is located close to the outer surface of the valve body.

11. The valve body processing method according to claim 4, wherein, The steps of machining the blank to obtain the finished valve body include: At least one of the first end face and the second end face of the cylindrical body is processed to form a pipeline connection end.

12. The valve body processing method according to claim 1, wherein, The profile is made of aluminum alloy or copper.

13. A method for processing a ball valve, characterized in that, Includes the following steps: A valve body, an end cap, and a connecting pipe are provided, wherein the valve body is manufactured by the valve body manufacturing method as described in any one of the claims; The connecting pipe is fixed to the end cap by welding; The end cap is fixed to the valve body by welding.

14. The ball valve processing method according to claim 13, wherein, The connecting pipe is fixed to the end cap by high-frequency welding; And / or, the end cap is fixed to the valve body by laser welding.

15. The ball valve processing method according to claim 13, wherein, Provide a valve stem, and assemble the valve stem to the connector before welding the connector to the end cap; The step of assembling the valve stem into the connecting pipe includes: An installation hole is made on the side wall of the connector, the valve is inserted into the installation hole and fixed to the connector by welding.

16. The ball valve processing method according to claim 15, wherein, The mounting hole is surrounded by a flange, and the valve stem is inserted into the flange and connected to the flange.

17. The ball valve processing method according to claim 13, wherein, The valve body includes a main body and a valve head, the valve head having a valve stem hole, and the ball valve processing method further includes: A valve stem and a valve core are provided, and the valve core is assembled into the main body. The valve stem is inserted into the main body through the valve stem hole to limit the connection with the valve core. A valve cap is provided and assembled onto the valve head to form a sealing fit with the valve head.

18. The ball valve processing method according to claim 17, wherein, The number of end caps is one, and the valve stem and the valve core are assembled into the valve body before the end caps are fixed to the valve body by welding. Alternatively, there may be two end caps, and after one end cap is fixed to the valve body by welding, the valve stem and the valve core are assembled to the valve body, and then the other end cap is fixed to the valve body by welding.

19. The ball valve processing method according to claim 13, wherein, The ball valve processing method further includes: A mounting flange is provided and welded to the side wall of the valve body, or the mounting flange is locked to the side wall of the valve body by fasteners.

20. A ball valve, characterized in that, It is manufactured by the ball valve manufacturing method as described in any one of claims 13-19.

21. The ball valve according to claim 20, wherein, The ball valve includes a valve body, an end cap, and a connecting pipe. The valve body has a receiving cavity. The end cap is located between the valve body and the connecting pipe and is connected to both the valve body and the connecting pipe. The end cap also has a flow hole that connects to both the receiving cavity and the connecting pipe. A welding groove is provided at the connection between the end cap and the valve body. The welding groove includes a first conical surface on the end cap and / or a second conical surface on the valve body. The end cap and the valve body are welded and fixed together by the welding groove.

22. The ball valve according to claim 21, wherein, The end cap is fixed to the valve body by laser welding, and / or the end cap is fixed to the connecting pipe by high-frequency welding.

23. The ball valve according to claim 21, wherein, The end cap includes an end cap body and a first connecting part, the first connecting part protruding and connected to one end of the end cap body along the axial direction; The first connecting part is inserted into the receiving cavity and connected to the valve body.

24. The ball valve according to claim 23, wherein, The outer surface of the valve body is provided with a solder spreading area, which is located close to and connected to the welding groove. And / or, the outer surface of the valve body protrudes radially to form a valve head, and a clearance area is formed at the end of the valve head near the welding groove.

25. The ball valve according to claim 24, wherein, The inner diameter of the receiving cavity is b, and the outer diameter of the first connecting part is E, wherein bE≤0.5mm; And / or, the outer diameter of the valve body at the solder spreading area is a, and the outer diameter of the end cap body is D, wherein |Da|≤1mm; And / or, the width of the solder spreading area is d, and d≥1mm; And / or, the depth of the welding groove is f, and the wall thickness of the valve body is g, wherein 0.1≤f / g≤0.5; And / or, the welding groove includes the first conical surface and the second conical surface, and the included angle formed by the first conical surface and the second conical surface is e, and 70°≤e≤120°.

26. The ball valve according to claim 23, wherein, The flow hole includes a first section, which is located at one end of the flow hole near the receiving cavity; The ball valve also includes a valve core and a seal. The valve core is rotatably mounted in the receiving cavity, and the seal is installed in the first orifice to seal the connection between the valve core and the end cap.

27. The ball valve according to claim 26, wherein, The bottom wall of the first hole protrudes axially to form a limiting part, which abuts against the sealing element.

28. The ball valve according to claim 27, wherein, The limiting part is configured as a limiting protrusion ring, and the limiting protrusion ring extends in a ring shape; Alternatively, the limiting portion may be configured as a limiting protrusion, and the number of the limiting protrusions may be multiple, with the multiple limiting protrusions arranged at intervals along the circumference of the end cap.

29. The ball valve according to claim 23, wherein, The outer diameter of the end cap body is D, and the thickness of the end cap body is G, where G ≥ D / 20.

30. The ball valve according to claim 23, wherein, The flow hole further includes a second section, which is located at one end of the flow hole near the connector, and the connector is inserted into the second section and abuts against the bottom wall of the second section.

31. The ball valve according to claim 30, wherein, The end cap further includes a second connecting portion, which protrudes out and is connected to the end of the end cap body that is away from the first connecting portion, and the second hole segment is at least partially provided in the second connecting portion; Wherein, the wall thickness of the connecting pipe is T, the inner diameter of the second hole section is A, and 0.05mm≤AT≤0.5mm; And / or, the wall thickness of the second connecting part is B, and 1≤B / T≤2; And / or, the depth of the second hole segment is C, and C / T≥0.8; And / or, the outer diameter of the end cap body is D, the height of the second connecting portion protruding from the end cap body is F, and F≥D / 15.

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