Ball valve

Abstract

Disclosed is a ball valve, comprising: a valve body (10) comprising a valve cavity (101) provided with an opening, the valve cavity (101) extending through the valve body (10); a valve core (20) provided with a through hole (201), the valve core (20) being rotatably arranged in the valve cavity (101); a valve cover assembly (30) arranged at the opening, wherein the valve cover assembly (30) is provided with at least a first portion in fitting connection with an inner wall of the valve body (10) and a second portion in fitting connection with an end of the valve body (10); and the valve cover assembly (30) is provided with an interface (3201), and the through hole (201) of the valve core (20) is in communication with or isolated from the interface (3201) to switch the opening or closing of the ball valve. The valve cover assembly (30) comprises a first connecting member (31) and a second connecting member (32) which are separately arranged, and the second connecting member (32) is located on the side of the first connecting member (31) away from the valve core (20). In this way, the problem in the prior art of relatively high costs when machining a valve cover having a complex structure by means of turning is solved.

Description

ball valve

[0001] This application claims priority to the patent application filed with the China National Intellectual Property Administration on October 31, 2024, with application number 202411547430.5 and the invention title "Ball Valve". Technical Field

[0002] This application relates to the field of valve technology, and more specifically, to a ball valve. Background Technology

[0003] Ball valves are widely used in various industrial pipelines due to their reliable sealing performance, long service life, and low fluid resistance. A ball valve typically consists of components such as a valve body, valve cover, valve ball, gasket, and connecting pipes.

[0004] In related technologies, valve covers are typically manufactured using machining to make them a single, integrated structure. However, machining complex valve covers is relatively expensive. Summary of the Invention

[0005] This application provides a ball valve to solve the problem of high cost when machining valve covers with complex structures in the prior art.

[0006] This application provides a ball valve, comprising: a valve body including a valve cavity having an opening extending through the valve body; a valve core having a through hole and rotatably disposed within the valve cavity; a valve cover assembly disposed at the opening, the valve cover assembly having at least a first portion fitted and connected to the inner wall of the valve body and a second portion fitted and connected to the end of the valve body; the valve cover assembly having an interface, the through hole of the valve core communicating with or being isolated from the interface to switch the opening or closing of the ball valve; the valve cover assembly including a first connector and a second connector separately disposed, the second connector being located on the side of the first connector away from the valve core.

[0007] Furthermore, the first connector has a first portion, and the second connector has a second portion.

[0008] Furthermore, the first connector has a first part and a second part.

[0009] Furthermore, the first connector is formed by a stamping or drawing process; and / or, the second connector is formed by a stamping or drawing process.

[0010] Furthermore, the valve core and valve cover assembly are constructed with a mounting groove facing the position near the valve core. The mounting groove is coaxial with the interface and is located close to the interface. The ball valve also includes a sealing part, which is disposed in the mounting groove and abuts against the surface of the valve core to isolate the valve cavity from the interface.

[0011] Furthermore, a mounting groove is formed between the first connector and the second connector; or, a mounting groove is provided on the end face of the first connector facing the valve core; or, a mounting groove is formed between the end face of the first connector facing the valve core and the inner wall of the valve body; wherein, the mounting groove is connected to the interface, and the cross-sectional area of ​​the mounting groove is larger than the cross-sectional area of ​​the interface.

[0012] Furthermore, a mounting groove is formed between the first connector and the second connector. The second connector has a first end and a second end that are arranged opposite to each other along the axial direction, with the first end facing the valve core. The inner diameter of the end face of the first end is smaller than the inner diameter of the end of the first connector away from the valve cavity. The end face of the first end abuts against the end face of the first connector away from the valve core, and the end face of the first end forms a mounting groove with the inner sidewall of the first connector. Alternatively, the first end of the second connector passes through the first connector, and the end face of the first end forms a mounting groove with the inner sidewall of the first connector.

[0013] Furthermore, one of the first and second connectors is welded to the valve body; and / or, one of the first and second connectors is used for welding to the ball valve's connecting pipe.

[0014] Furthermore, the first connector includes a first segment and a second segment connected sequentially along the axial direction. The outer diameter of the first segment is smaller than the outer diameter of the second segment. A first stepped surface is formed between the first segment and the second segment. The first segment passes through the valve cavity, and the first stepped surface abuts against the end face of the valve body.

[0015] Furthermore, the second connector includes a third segment and a fourth segment connected sequentially along the axial direction. The outer diameter of the third segment is smaller than that of the fourth segment. A second stepped surface is formed between the third segment and the fourth segment. The third segment passes through the first connector, and the second stepped surface abuts against the end face of the first connector that is away from the valve core.

[0016] Furthermore, the first connector is inserted into the valve cavity, and the second connector includes an abutment surface. The end face of the first connector away from the valve core and the end face of the valve body abut against the abutment surface, respectively.

[0017] Furthermore, the second connector includes a third segment and a fourth segment connected sequentially along the axial direction. The outer diameter of the third segment is smaller than that of the fourth segment. The third segment passes through the first connector, and an abutment surface is formed between the third segment and the fourth segment. Alternatively, the second connector is located on the outside of the valve body, and the end face of the second connector near the valve core forms an abutment surface.

[0018] Furthermore, the valve body has a mounting port on its side wall, which communicates with the valve cavity. The ball valve also includes: a mounting seat, which is located at the mounting port; and a valve stem, which is rotatably mounted in the mounting seat, with one end of the valve stem located in the valve cavity and mounted on the valve core.

[0019] Furthermore, the ball valve also includes a connecting pipe installed at the interface of the valve cover assembly. The connecting pipe includes a first pipe section and a second pipe section connected to each other. The end of the first pipe section away from the second pipe section passes through the interface. The first pipe section is made of stainless steel, and the second pipe section is made of copper.

[0020] Furthermore, the end of the first pipe section furthest from the second pipe section extends into the mounting groove through the interface and abuts against the end face of the sealing part furthest from the valve core.

[0021] Furthermore, the first pipe section protrudes inward relative to the groove wall of the mounting groove at the end near the valve core to form a convex part, and the end of the sealing part away from the valve core has a concave part, with the convex part and the concave part fitting together.

[0022] By applying the technical solution of this application, the valve cover assembly is decomposed into independent first and second connecting parts, which are then used together to form a complete valve cover assembly, thus maintaining the original function of the valve cover assembly. Specifically, the first and second connecting parts are processed separately, which simplifies the structure of each component and allows for more economical processing methods, reducing waste generated from processing complex structures and lowering manufacturing costs. Furthermore, the first and second connecting parts can be processed in parallel, shortening the production cycle and improving production efficiency. After assembling the valve cover assembly with the valve body, the first part of the valve cover assembly is fitted to the inner wall of the valve body, and the second part of the valve cover assembly is fitted to the end of the valve body. This arrangement increases the contact area between the valve cover assembly and the valve body, improving the stability of the connection between the valve cover assembly and the valve body. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0024] Figure 1 shows a schematic diagram of a ball valve provided according to Embodiment 1 of this application;

[0025] Figure 2 shows a partial structural schematic diagram of the ball valve provided according to Embodiment 1 of this application;

[0026] Figure 3 shows a schematic diagram of the structure of the first connector provided according to Embodiment 1 of this application;

[0027] Figure 4 shows a schematic diagram of the structure of the second connector provided according to Embodiment 1 of this application;

[0028] Figure 5 shows a schematic diagram of the ball valve provided according to Embodiment 2 of this application;

[0029] Figure 6 shows a partial structural schematic diagram of the ball valve provided according to Embodiment 2 of this application;

[0030] Figure 7 shows a schematic diagram of the structure of the first connector provided according to Embodiment 2 of this application;

[0031] Figure 8 shows a schematic diagram of the structure of the second connector provided according to Embodiment 2 of this application;

[0032] Figure 9 shows a schematic diagram of the ball valve provided according to Embodiment 3 of this application;

[0033] Figure 10 shows a partial structural schematic diagram of the ball valve provided according to Embodiment 3 of this application;

[0034] Figure 11 shows a schematic diagram of the structure of the first connector provided according to Embodiment 3 of this application;

[0035] Figure 12 shows a schematic diagram of the structure of the second connector provided according to Embodiment 3 of this application;

[0036] Figure 13 shows a schematic diagram of a ball valve provided according to Embodiment 4 of this application;

[0037] Figure 14 shows a partial structural schematic diagram of the ball valve provided according to Embodiment 4 of this application;

[0038] Figure 15 shows a schematic diagram of the structure of the first connector provided according to Embodiment 4 of this application;

[0039] Figure 16 shows a schematic diagram of the structure of the second connector provided according to Embodiment 4 of this application;

[0040] Figure 17 shows a schematic diagram of a ball valve provided according to Embodiment 5 of this application;

[0041] Figure 18 shows a partial structural schematic diagram of the ball valve provided according to Embodiment 5 of this application.

[0042] The above-mentioned drawings include the following reference numerals: 01, connecting pipe; 011, first pipe section; 0111, protrusion; 012, second pipe section; 10, valve body; 101, valve cavity; 102, mounting port; 20, valve core; 201, through hole; 30, valve cover assembly; 31, first connecting member; 3101, first stepped surface; 311, first segment; 312, second segment; 313, fifth segment; 314, sixth segment; 32, second connecting member; 3201, interface; 3202, abutment surface; 321, third segment; 322, fourth segment; 40, mounting groove; 50, sealing part; 501, recess; 61, mounting base; 62, valve stem; 63, cap. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] As shown in Figures 1 to 4, Embodiment 1 of this application provides a ball valve, which includes a valve body 10, a valve core 20, and a valve cover assembly 30. The valve body 10 includes a valve cavity 101 with an opening, the valve cavity 101 extending through the valve body 10; the valve core 20 has a through hole 201, and the valve core 20 is rotatably disposed within the valve cavity 101; the valve cover assembly 30 is disposed at the opening, and the valve cover assembly 30 has at least a first part that fits and connects to the inner wall of the valve body 10 and a second part that fits and connects to the end of the valve body 10; the valve cover assembly has an interface 3201, the through hole 201 of the valve core 20 is connected to or separated from the interface 3201, so as to switch the opening or closing of the ball valve; the valve cover assembly 30 includes a first connector 31 and a second connector 32 separately disposed, the second connector 32 being located on the side of the first connector 31 away from the valve core 20.

[0045] In this embodiment, two sets of valve cover assemblies 30 are provided. The two sets of valve cover assemblies 30 are symmetrically arranged at the openings at the two ends of the valve cavity 101 in the extension direction. The two ends of the through hole 201 are respectively provided with the interface 3201 of the two sets of valve cover assemblies 30.

[0046] By applying the technical solution of this application, the valve cover assembly 30 is decomposed into independent first connecting member 31 and second connecting member 32, which are then used together to form a complete valve cover assembly 30, thus maintaining the original function of the valve cover assembly 30. Specifically, the first connecting member 31 and the second connecting member 32 are processed separately, which makes the structure of each component relatively simple, allows for more economical processing methods, reduces waste generated from processing complex structures, and lowers manufacturing costs. Furthermore, the first connecting member 31 and the second connecting member 32 can be processed in parallel, which can shorten the production cycle and improve production efficiency. After assembling the valve cover assembly 30 with the valve body 10, the first part of the valve cover assembly 30 is fitted and connected to the inner wall of the valve body 10, and the second part of the valve cover assembly 30 is fitted and connected to the end of the valve body 10. This arrangement can improve the stability of the connection between the valve cover assembly 30 and the valve body 10.

[0047] In this design, the first connector 31 is formed by stamping or drawing. Using stamping or drawing to form the first connector 31 effectively utilizes material and reduces waste. Stamping or drawing processes can typically directly process the required shape from sheet metal or tubing, reducing material cutting and removal. Furthermore, stamping and drawing processes are suitable for automated production lines, enabling high-efficiency, high-volume production, reducing manual intervention, and lowering labor costs.

[0048] Similarly, in this solution, the second connecting member 32 is formed by stamping or stretching.

[0049] Further, taking one set of valve cover assemblies 30 as an example, the valve core 20 and the valve cover assembly 30 are constructed with a mounting groove 40 facing towards the valve core 20. The mounting groove 40 is coaxial with the interface 3201 and is located close to the interface 3201. The mounting groove 40 is circumferentially arranged around the outer periphery of the valve core 20. The ball valve also includes a sealing part 50, which is disposed within the mounting groove 40 and abuts against the surface of the valve core to isolate the valve chamber 101 from the interface 3201. By providing the sealing part 50 within the mounting groove 40, the gap between the valve core 20 and the valve body 10 can be effectively sealed, preventing fluid leakage and improving the sealing reliability of the ball valve. Furthermore, the above arrangement simplifies the design of the sealing structure, facilitating manufacturing and maintenance.

[0050] In this embodiment of the solution, the first connector 31 and the second connector 32 are provided with mounting grooves 40 facing the position close to the valve core 20. The mounting grooves 40 are connected to the interface 3201, and the cross-sectional area of ​​the mounting grooves 40 is larger than the cross-sectional area of ​​the interface 3201.

[0051] In this embodiment, the first connector 31 has a first portion, and the second connector 32 has a second portion. Specifically, both the first connector 31 and the second connector 32 are annular structures. The first connector 31 passes through the valve cavity 101, and the end face of the first connector 31 away from the valve core 20 is flush with the end face of the valve body 10. The outer peripheral surface of the first connector 31 abuts against the inner wall of the valve body 10. The second connector 32 is located on the outside of the valve body 10. The second connector 32 has a first end and a second end arranged opposite to each other along the axial direction. The first end is located close to the valve core 20. The inner diameter of the second connector 32 is smaller than the inner diameter of the first connector 31, and the outer diameter of the second connector 32 is equal to the outer diameter of the valve body 10. The end face of the first end forms an abutment surface 3202, which abuts against the end face of the first connector 31 away from the valve core 20 and the end face of the valve body 10, respectively. The end face of the first end forms a mounting groove 40 with the inner sidewall of the first connector 31. This arrangement ensures that the first connector 31 is entirely located inside the valve body 10, while the second connector 32 is located at the outer end of the valve body 10, resulting in a more reasonable and compact overall structural design.

[0052] In this design, when assembling the ball valve, one of the first connector 31 and the second connector 32 is welded to the valve body 10; the other of the first connector 31 and the second connector 32 is used to weld to the ball valve's connecting pipe 01.

[0053] In the specific embodiment of this solution, during assembly, the first connector 31 and the second connector 32 are first welded together. Then, the first connector 31 is inserted into the valve cavity 101, and the end face of the first end of the second connector 32 abuts against and is welded to the end face of the valve body 10.

[0054] In this design, a mounting port 102 is provided on the side wall of the valve body 10, which communicates with the valve cavity 101. The extending direction of the mounting port 102 is perpendicular to the extending direction of the valve cavity 101. The ball valve also includes a mounting seat 61 and a valve stem 62. The mounting seat 61 is located at the mounting port 102; the valve stem 62 is rotatably mounted in the mounting seat 61, and the extending direction of the valve stem 62 is perpendicular to the axial direction of the through hole 201 of the valve core 20. One end of the valve stem 62 is located in the valve cavity 101 and mounted on the valve core 20, while the other end of the valve stem 62 is located outside the mounting seat 61. This configuration facilitates the adjustment of the valve core 20.

[0055] In this embodiment, the ball valve further includes a cap 63, which covers the outer periphery of the mounting base 61 at the end furthest from the valve body 10 and is threadedly connected to the mounting base 61. The cap 63, covering the outer periphery of the mounting base 61 at the end furthest from the valve body 10, helps prevent fluid leakage around the valve stem 62, thereby enhancing the sealing performance of the ball valve. The threaded connection between the cap 63 and the mounting base 61 makes installation and removal of the cap 63 simple and quick, facilitating maintenance and inspection.

[0056] Furthermore, the valve body 10, the first connector 31, and the second connector 32 are all made of stainless steel. The ball valve also includes a connecting pipe 01, which is installed at the interface 3201 of the valve cover assembly 30. The connecting pipe 01 includes a first pipe section 011 and a second pipe section 012 connected to each other. The end of the first pipe section 011 furthest from the second pipe section 012 extends into the interface 3201, and the first pipe section 011 and the second connector 32 are welded together. The first pipe section 011 is made of stainless steel, and the second pipe section 012 is made of copper. This design minimizes the amount of copper used, reducing the cost of the ball valve.

[0057] In this embodiment, the end of the first pipe section 011 furthest from the second pipe section 012 extends into the mounting groove 40 via the interface 3201 and abuts against the end face of the sealing part 50 furthest from the valve core 20. This arrangement allows the end of the first pipe section 011 furthest from the second pipe section 012 to provide a certain pre-tightening compression force to the sealing part 50, reducing or preventing the valve core 20 from rotating and causing the sealing part 50 to rotate. This reduces the possibility of the sealing part 50 being squeezed out or scraped out of the mounting groove 40, reduces the likelihood of sealing failure, improves the stability of the sealing part 50, and enhances its sealing effect.

[0058] Specifically, the length of the first pipe section 011 extending into the mounting groove 40 is set to 0.3mm to 0.5mm. Specifically, it can be set to 0.3mm, 0.4mm, or 0.5mm. During the assembly of the first pipe section 011 and the valve cover assembly 30, the first pipe section 011 is interference-fitted with the first connector 31 and the second connector 32, respectively. The relative positions of the first pipe section 011 and the valve cover assembly 30 are determined using specialized press-fitting equipment or specialized tooling fixtures to ensure the assembly accuracy of the first pipe section 011 and the valve cover assembly 30. Afterwards, the first pipe section 011 and the second connector 32 are welded. Specifically, welding can be performed by laser welding or by furnace brazing. When using furnace brazing, to obtain better penetration effect, a knurling or wire drawing process can be applied to the end of the first pipe section 011 that mates with the valve cover assembly 30 within a certain length range.

[0059] In this embodiment, the end of the first pipe segment 011 closest to the valve core 20 protrudes inward relative to the wall of the mounting groove 40 to form a protrusion 0111, and the end of the sealing part 50 furthest from the valve core 20 has a recess 501, which is adapted to the protrusion 0111. This arrangement reduces the possibility of deformation of the sealing part 50 after the first pipe segment 011 comes into contact with the sealing part 50, thereby improving the sealing effect of the sealing part 50.

[0060] In some other embodiments of this solution, the end of the sealing part 50 away from the valve core 20 is a planar structure. When the first pipe section 011 extends into the mounting groove 40, the end face of the first pipe section 011 presses against the sealing part 50, causing the sealing part 50 to deform within a certain range.

[0061] As shown in Figures 5 to 8, Embodiment 2 of this application provides a ball valve. The difference from Embodiment 1 is that the first end of the second connector 32 passes through the first connector 31, and the end face of the first end forms a mounting groove 40 with the inner wall of the first connector 31. This arrangement increases the contact area between the first connector 31 and the second connector 32, improving the stability of the connection between the first connector 31 and the second connector 32.

[0062] Furthermore, the second connector 32 includes a third segment 321 and a fourth segment 322 connected sequentially along the axial direction. The outer diameter of the third segment 321 is smaller than the outer diameter of the fourth segment 322, and the outer diameter of the fourth segment 322 is equal to the outer diameter of the valve body 10. A second stepped surface is formed between the third segment 321 and the fourth segment 322, and the second stepped surface forms an abutment surface 3202. The length of the third segment 321 is smaller than the length of the first connector 31. The third segment 321 passes through the first connector 31, and the abutment surface 3202 abuts against the end face of the first connector 31 that is away from the valve core 20 and the end face of the valve body 10, respectively.

[0063] When assembling the ball valve, the third section 321 is inserted into the first connector 31, so that the end face of the first connector 31 abuts against the abutment surface 3202. The first connector 31 and the second connector 32 are connected by welding. Then, the first connector 31 is inserted into the valve cavity 101, so that the abutment surface 3202 abuts against the end face of the valve body 10 and is welded.

[0064] As shown in Figures 9 to 12, Embodiment 3 of this application provides a ball valve. The difference from Embodiment 2 is that the first connecting member 31 has a first portion and a second portion. The first connecting member 31 includes a first segment 311 and a second segment 312 connected sequentially along the axial direction. The outer diameter of the first segment 311 is smaller than the outer diameter of the second segment 312. A first stepped surface 3101 is formed between the first segment 311 and the second segment 312. The first segment 311 passes through the valve cavity 101, and the first stepped surface 3101 abuts against the end face of the valve body 10. This arrangement increases the contact area between the first connecting member 31 and the valve body 10, thereby increasing the stability of the connection between the first connecting member 31 and the valve body 10.

[0065] Furthermore, the length of the third segment 321 is less than the length of the first connecting member 31. Specifically, during ball valve assembly, the third segment 321 is inserted into the first connecting member 31 from the end containing the second segment 312, so that the contact surface 3202 abuts against the end face of the second segment 312 furthest from the first segment 311. The first connecting member 31 and the second connecting member 32 are then connected by welding. Afterward, the first segment 311 is inserted into the valve cavity 101, so that the first stepped surface 3101 abuts against and is welded to the end face of the valve body 10. This arrangement ensures the contact area between the first connecting member 31 and the valve body 10, improving the stability of the connection between the first connecting member 31 and the valve body 10.

[0066] As shown in Figures 13 to 16, Embodiment 4 of this application provides a ball valve, which differs from Embodiment 1 in that the end face of the first connecting member 31 facing the valve core 20 is provided with a mounting groove 40. That is, the first connecting member 31 includes a fifth segment 313 and a sixth segment 314 connected sequentially along the axial direction. The inner diameter of the fifth segment 313 is larger than the inner diameter of the sixth segment 314, and the outer diameter of the fifth segment 313 is equal to the outer diameter of the sixth segment 314. The mounting groove 40 is formed between the fifth segment 313 and the sixth segment 314.

[0067] Specifically, when assembling the ball valve, the end face of the sixth segment 314 away from the fifth segment 313 is abutted and welded to the abutting surface 3202 of the second connector 32. Then, the first connector 31 is inserted into the valve cavity 101 so that the abutting surface 3202 abuts and welds to the end face of the valve body 10.

[0068] As shown in Figures 17 and 18, Embodiment 5 of this application provides a ball valve. The difference from Embodiment 1 is that the inner diameter of the first connecting member 31 is the same as the inner diameter of the second connecting member 32, the outer diameter of the first connecting member 31 fits against the inner wall of the valve body 10, and a mounting groove 40 is formed between the end face of the first connecting member 31 facing the valve core 20 and the inner wall of the valve body 10. This configuration results in a simple structure and facilitates manufacturing.

[0069] Specifically, when assembling the ball valve, the end face of one end of the first connector 31 is welded to the end face of one end of the second connector 32. Then, the first connector 31 is inserted into the valve cavity 101, so that the end face of the second connector 32 connected to the first connector 31 abuts and is welded to the end face of the valve body 10.

[0070] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0071] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

Claims

1. A ball valve, characterized in that, include: The valve body (10) includes a valve cavity (101) with an opening, the valve cavity (101) penetrating the valve body (10); The valve core (20) is provided with a through hole (201), and the valve core (20) is rotatably disposed in the valve cavity (101); A valve cover assembly (30) is disposed at the opening. The valve cover assembly (30) is provided with at least a first part that is fitted and connected to the inner wall of the valve body (10) and a second part that is fitted and connected to the end of the valve body (10). The valve cover assembly (30) has an interface (3201). The through hole (201) of the valve core (20) is connected to or separated from the interface (3201) to switch the opening or closing of the ball valve. The valve cover assembly (30) includes a first connector (31) and a second connector (32) that are separately disposed, with the second connector (32) located on the side of the first connector (31) away from the valve core (20).

2. The ball valve according to claim 1, characterized in that, The first connector (31) has the first portion, and the second connector (32) has the second portion.

3. The ball valve according to claim 1, characterized in that, The first connector (31) has the first part and the second part.

4. The ball valve according to claim 1, characterized in that, The first connector (31) is formed by a stamping or stretching process; and / or, The second connector (32) is formed by stamping or stretching.

5. The ball valve according to any one of claims 1 to 4, characterized in that, The valve core (20) and the valve cover assembly (30) are provided with mounting grooves (40) facing closer to the valve core (20), the mounting grooves (40) being coaxial with the interface (3201), and the ball valve further includes: A sealing part (50) is disposed in the mounting groove (40) and abuts against the surface of the valve core (20) to isolate the valve cavity (101) and the interface (3201).

6. The ball valve according to claim 5, characterized in that, The mounting groove (40) is formed between the first connector (31) and the second connector (32); or, The first connector (31) has a mounting groove (40) on its end face facing the valve core (20); or, The mounting groove (40) is formed between the end face of the first connector (31) facing the valve core (20) and the inner wall of the valve body (10); The mounting groove (40) is connected to the interface (3201), and the cross-sectional area of ​​the mounting groove (40) is greater than the cross-sectional area of ​​the interface (3201).

7. The ball valve according to claim 5, characterized in that, The mounting groove (40) is formed between the first connector (31) and the second connector (32). The second connector (32) has a first end and a second end that are arranged opposite to each other along the axial direction. The first end is close to the valve core (20). The inner diameter of the end face of the first end is smaller than the inner diameter of the end of the first connector (31) away from the valve cavity (101), the end face of the first end abuts against the end face of the first connector (31) away from the valve core (20), and the end face of the first end forms the mounting groove (40) with the inner sidewall of the first connector (31); or, The first end of the second connector (32) passes through the first connector (31), and the end face of the first end forms the mounting groove (40) with the inner sidewall of the first connector (31).

8. The ball valve according to any one of claims 1 to 4, characterized in that, One of the first connector (31) and the second connector (32) is welded to the valve body (10); and / or, One of the first connector (31) and the second connector (32) is used for welding to the ball valve's connecting pipe (01).

9. The ball valve according to any one of claims 1 to 4, characterized in that, The first connector (31) includes a first segment (311) and a second segment (312) connected sequentially along the axial direction. The outer diameter of the first segment (311) is smaller than the outer diameter of the second segment (312). A first stepped surface (3101) is formed between the first segment (311) and the second segment (312). The first segment (311) passes through the valve cavity (101). The first stepped surface (3101) abuts against the end face of the valve body (10).

10. The ball valve according to claim 9, characterized in that, The second connector (32) includes a third segment (321) and a fourth segment (322) connected sequentially along the axial direction. The outer diameter of the third segment (321) is smaller than the outer diameter of the fourth segment (322). A second stepped surface is formed between the third segment (321) and the fourth segment (322). The third segment (321) passes through the first connector (31). The second stepped surface abuts against the end face of the first connector (31) that is away from the valve core (20).

11. The ball valve according to any one of claims 1 to 4, characterized in that, The first connector (31) passes through the valve cavity (101), and the second connector (32) includes an abutment surface (3202). The end face of the first connector (31) away from the valve core (20) and the end face of the valve body (10) respectively abut against the abutment surface (3202).

12. The ball valve according to claim 11, characterized in that, The second connector (32) includes a third segment (321) and a fourth segment (322) connected sequentially along the axial direction. The outer diameter of the third segment (321) is smaller than the outer diameter of the fourth segment (322). The third segment (321) passes through the first connector (31), and the abutment surface (3202) is formed between the third segment (321) and the fourth segment (322); or, The second connector (32) is located on the outside of the valve body (10), and the end face of the second connector (32) near the valve core (20) forms the abutment surface (3202).

13. The ball valve according to any one of claims 1 to 4, characterized in that, A mounting (102) is provided on the side wall of the valve body (10), the mounting (102) communicating with the valve cavity (101), and the ball valve further includes: Mounting base (61) is provided at the mounting (102); A valve stem (62) is rotatably disposed within the mounting base (61), with one end of the valve stem (62) located within the valve cavity (101) and disposed on the valve core (20).

14. The ball valve according to claim 5, characterized in that, The ball valve also includes: A connector (01) is installed at the junction (3201) of the valve cover assembly (30). The connector (01) includes a first pipe section (011) and a second pipe section (012) connected to each other. The end of the first pipe section (011) away from the second pipe section (012) passes through the junction (3201). The first pipe section (011) is made of stainless steel, and the second pipe section (012) is made of copper.

15. The ball valve according to claim 14, characterized in that, The end of the first pipe section (011) away from the second pipe section (012) extends into the mounting groove (40) through the connector (3201) and abuts against the end face of the sealing part (50) away from the valve core (20).

16. The ball valve according to claim 15, characterized in that, The first pipe section (011) protrudes inward relative to the groove wall of the mounting groove (40) at one end near the valve core (20) to form a protrusion (0111). The sealing part (50) has a recess (501) at one end away from the valve core (20). The recess (501) and the protrusion (0111) are adapted to each other.

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