Ball valve

Abstract

The utility model provides a ball valve which comprises a valve body which comprises a valve cavity with an opening, and the valve cavity penetrates through the valve body. The valve element is provided with a through hole, and the valve element is rotatably arranged in the valve cavity; the valve cover assembly is arranged at the opening, and the valve cover assembly is at least provided with a first part connected with the inner wall of the valve body in an attached mode and a second part connected with the end of the valve body in an attached mode; the valve deck assembly is provided with a connector, and the through hole of the valve element is communicated with or separated from the connector so that the ball valve can be switched to be opened or closed. The valve deck assembly comprises a first connecting piece and a second connecting piece which are arranged in a split mode, and the second connecting piece is located on the side, away from the valve element, of the first connecting piece. According to the scheme, the problem that in the prior art, when a valve deck of a complex structure is machined through turning, cost is high can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a ball valve. Background Art

[0002] Ball valves are widely used in various industrial pipelines due to their reliable sealing performance, long service life and low fluid resistance. Ball valves usually include valve body, valve cover, valve ball, sealing gasket, pipe and other components.

[0003] In the related art, the valve cover is usually manufactured by lathing to form an integrated structure. However, the cost of machining a valve cover with a complex structure is relatively high. Utility Model Content

[0004] The utility model provides a ball valve to solve the problem of high cost in machining a valve cover with a relatively complex structure through lathe in the prior art.

[0005] The utility model provides a ball valve, which comprises: a valve body, comprising a valve cavity provided with an opening, the valve cavity passing through the valve body; a valve core, provided with a through hole, the valve core being rotatably arranged in the valve cavity; a valve cover assembly, arranged at the opening, the valve cover assembly being provided with at least a first part that is fitted and connected to the inner wall of the valve body and a second part that is fitted and connected to the end of the valve body; the valve cover assembly has an interface, the through hole of the valve core is connected to or blocked from the interface, so as to switch the ball valve to be opened or closed; the valve cover assembly comprises a first connecting member and a second connecting member that are separately arranged, and the second connecting member is located on a side of the first connecting member away from the valve core.

[0006] Furthermore, the first connecting member has a first portion, and the second connecting member has a second portion.

[0007] Furthermore, the first connecting member has a first part and a second part.

[0008] Further, the first connecting member is formed by a stamping process or a stretching process; and / or the second connecting member is formed by a stamping process or a stretching process.

[0009] Furthermore, the valve core and valve cover assembly are constructed with an installation groove toward a position close to the valve core, the installation groove is coaxial with the interface, and the installation groove is arranged close to the interface. The ball valve also includes: a sealing part, which is arranged in the installation groove and abuts against the surface of the valve core to separate the valve cavity and the interface.

[0010] Furthermore, a mounting groove is formed between the first connecting member and the second connecting member; or, a mounting groove is provided on the end face of the first connecting member facing the valve core; or, a mounting groove is formed between the end face of the first connecting member 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.

[0011] Furthermore, a mounting groove is formed between the first connecting member and the second connecting member. The second connecting member has a first end and a second end arranged opposite to each other along the axial direction, and the first end faces 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 connecting member away from the valve cavity, the end face of the first end abuts the end face of the end of the first connecting member away from the valve core, and the end face of the first end and the inner side wall of the first connecting member form a mounting groove; or, the first end of the second connecting member is passed through the first connecting member, and the end face of the first end and the inner side wall of the first connecting member form a mounting groove.

[0012] Furthermore, one of the first connecting member and the second connecting member is welded to the valve body; and / or one of the first connecting member and the second connecting member is used to be welded to the connecting pipe of the ball valve.

[0013] Furthermore, the first connecting member includes a first section and a second section connected in sequence along the axial direction, the outer diameter of the first section is smaller than the outer diameter of the second section, a first step surface is formed between the first section and the second section, the first section is inserted into the valve cavity, and the first step surface abuts against the end face of the valve body.

[0014] Furthermore, the second connecting member includes a third section and a fourth section connected in sequence along the axial direction, the outer diameter of the third section is smaller than the outer diameter of the fourth section, a second step surface is formed between the third section and the fourth section, the third section is passed through the first connecting member, and the second step surface abuts against the end face of the first connecting member that faces away from the valve core.

[0015] Furthermore, the first connecting member is inserted into the valve cavity, the second connecting member includes an abutting surface, and the end surface of the first connecting member away from the valve core and the end surface of the valve body respectively abut against the abutting surface.

[0016] Furthermore, the second connecting member includes a third section and a fourth section connected in sequence along the axial direction, the outer diameter of the third section is smaller than the outer diameter of the fourth section, the third section is arranged in the first connecting member, and an abutment surface is formed between the third section and the fourth section; or, the second connecting member is located on the outside of the valve body, and the end face of the second connecting member close to the valve core forms an abutment surface.

[0017] Furthermore, an installation port is provided on the side wall of the valve body, and the installation port is connected to the valve cavity. The ball valve also includes: a mounting seat, which is provided at the installation port; a valve stem, which is rotatably provided in the mounting seat, and one end of the valve stem is located in the valve cavity and is provided on the valve core.

[0018] Furthermore, the ball valve also includes a connecting pipe, which is installed at the interface of the valve cover assembly. The connecting pipe includes a first pipe section and a second pipe section that are connected to each other. The end of the first pipe section away from the second pipe section is passed through the interface. The first pipe section is made of stainless steel and the second pipe section is made of copper.

[0019] Furthermore, one end of the first pipe section away from the second pipe section extends into the installation groove through the interface and abuts against the end surface of the sealing portion away from the valve core.

[0020] Furthermore, one end of the first pipe section close to the valve core protrudes inward relative to the groove wall of the installation groove to form a convex portion, and the end of the sealing portion away from the valve core has a concave portion, and the convex portion and the concave portion are adapted to each other.

[0021] By applying the technical solution of the present invention, the valve cover assembly is decomposed into independent first and second connectors, which are then used together to form a complete valve cover assembly, so that the valve cover assembly maintains its original function. Specifically, the first and second connectors are processed separately, which can make the structure of each component relatively simple, and a more economical processing method can be used during processing, which can reduce the waste generated by processing complex structures and reduce manufacturing costs. In addition, the first and second connectors can be processed in parallel, which can shorten the production cycle and improve production efficiency. After the valve cover assembly is assembled with the valve body, the first part of the valve cover assembly is fitted and connected to the inner wall of the valve body, and the second part of the valve cover assembly is fitted and connected to the end of the valve body. Such an arrangement can increase the contact area between the valve cover assembly and the valve body and enhance the stability of the connection between the valve cover assembly and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of a ball valve provided according to the first embodiment of the present utility model is shown;

[0024] Figure 2 A partial structural diagram of a ball valve provided according to the first embodiment of the present utility model is shown;

[0025] Figure 3 A schematic structural diagram of a first connecting member provided according to the first embodiment of the present utility model is shown;

[0026] Figure 4 A schematic structural diagram of a second connecting member provided according to the first embodiment of the present utility model is shown;

[0027] Figure 5 A schematic diagram of a ball valve provided according to the second embodiment of the present utility model is shown;

[0028] Figure 6 A partial structural diagram of a ball valve provided according to the second embodiment of the present utility model is shown;

[0029] Figure 7It shows a structural schematic diagram of the first connecting member provided according to the second embodiment of the present utility model;

[0030] Figure 8 A schematic structural diagram of a second connecting member provided according to the second embodiment of the present utility model is shown;

[0031] Figure 9 A schematic diagram of a ball valve provided according to a third embodiment of the present invention is shown;

[0032] Figure 10 A partial structural diagram of a ball valve provided according to the third embodiment of the present utility model is shown;

[0033] Figure 11 It shows a structural schematic diagram of the first connecting member provided according to the third embodiment of the present utility model;

[0034] Figure 12 A schematic structural diagram of a second connecting member provided according to a third embodiment of the present invention is shown;

[0035] Figure 13 A schematic diagram of a ball valve provided according to a fourth embodiment of the present utility model is shown;

[0036] Figure 14 A partial structural diagram of a ball valve provided according to a fourth embodiment of the present utility model is shown;

[0037] Figure 15 A schematic structural diagram of a first connecting member provided according to a fourth embodiment of the present utility model is shown;

[0038] Figure 16 A schematic structural diagram of a second connecting member provided according to a fourth embodiment of the present utility model is shown;

[0039] Figure 17 A schematic diagram of a ball valve provided according to a fifth embodiment of the present invention is shown;

[0040] Figure 18 A partial structural diagram of a ball valve provided according to embodiment five of the present utility model is shown.

[0041] The above drawings include the following reference numerals:

[0042] 01, connecting pipe; 011, first pipe section; 0111, convex part; 012, second pipe section;

[0043] 10. Valve body; 101. Valve cavity; 102. Installation port;

[0044] 20. Valve core; 201. Through hole;

[0045] 30. Valve cover assembly;

[0046] 31. First connecting member; 3101. First stepped surface;

[0047] 311, first paragraph; 312, second paragraph;

[0048] 313, fifth paragraph; 314, sixth paragraph;

[0049] 32. Second connecting member; 3201. Interface; 3202. Abutting surface;

[0050] 321, third paragraph; 322, fourth paragraph;

[0051] 40. Mounting slot;

[0052] 50. Sealing part; 501. Recessed part;

[0053] 61. Mounting seat; 62. Valve stem; 63. Cap. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] like Figures 1 to 4 As shown, the first embodiment of the present invention 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, which passes through the valve body 10; the valve core 20 is provided with a through hole 201, and the valve core 20 is rotatably arranged in the valve cavity 101; the valve cover assembly 30 is arranged at the opening, and the valve cover assembly 30 is provided with at least a first part that is in contact with the inner wall of the valve body 10 and a second part that is in contact with the end of the valve body 10; the valve cover assembly has an interface 3201, and the through hole 201 of the valve core 20 is connected to or blocked from the interface 3201 to switch the ball valve open or closed; the valve cover assembly 30 includes a first connecting member 31 and a second connecting member 32 that are separately provided, and the second connecting member 32 is located on the side of the first connecting member 31 away from the valve core 20.

[0056] In the embodiment of this scheme, two groups of valve cover assemblies 30 are provided, and the two groups of valve cover assemblies 30 are symmetrically arranged at the openings at the two ends of the extension direction of the valve cavity 101, and the two ends of the through hole 201 are respectively arranged corresponding to the interfaces 3201 of the two groups of valve cover assemblies 30.

[0057] By applying the technical solution of the present invention, the valve cover assembly 30 is decomposed into independent first connecting parts 31 and second connecting parts 32, which are then used together to form a complete valve cover assembly 30, so that the valve cover assembly 30 maintains its original function. Specifically, the first connecting part 31 and the second connecting part 32 are processed separately, which can make the structure of each component relatively simple, and a more economical processing method can be used during processing, which can reduce the waste generated by processing complex structures and reduce manufacturing costs. In addition, the first connecting part 31 and the second connecting part 32 can be processed in parallel, which can shorten the production cycle and improve production efficiency. After the valve cover assembly 30 is assembled 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. Such an arrangement can improve the stability of the connection between the valve cover assembly 30 and the valve body 10.

[0058] In this embodiment, the first connector 31 is formed by a stamping or stretching process. Using a stamping or stretching process to form the first connector 31 effectively utilizes materials and reduces waste. Stamping or stretching processes can typically directly form the desired shape from sheet metal or tubing, reducing the need for cutting and removing material. Furthermore, stamping and stretching processes are suitable for automated production lines, enabling efficient, high-volume production, minimizing manual intervention, and lowering labor costs.

[0059] Similarly, in this solution, the second connecting member 32 is formed by a stamping process or a stretching process.

[0060] Furthermore, 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 toward a position close to the valve core 20. The mounting groove 40 is coaxial with the interface 3201, and the mounting groove 40 is arranged close to the interface 3201. The mounting groove 40 is annularly arranged on the outer periphery of the valve core 20. The ball valve also includes a sealing portion 50, which is arranged in the mounting groove 40 and abuts against the surface of the valve core to separate the valve cavity 101 and the interface 3201. By providing the sealing portion 50 in the mounting groove 40, the gap between the valve core 20 and the valve body 10 can be effectively sealed to prevent fluid leakage and improve the sealing reliability of the ball valve. In addition, the above arrangement simplifies the design of the sealing structure, facilitating manufacturing and maintenance.

[0061] In the embodiment of this solution, the first connecting member 31 and the second connecting member 32 are configured with an installation groove 40 toward a position close to the valve core 20 . The installation groove 40 is connected to the interface 3201 , and the cross-sectional area of ​​the installation groove 40 is larger than the cross-sectional area of ​​the interface 3201 .

[0062] In this embodiment, the first connecting member 31 has a first portion, and the second connecting member 32 has a second portion. Specifically, both the first connecting member 31 and the second connecting member 32 have an annular structure. The first connecting member 31 is disposed within the valve cavity 101. The end surface of the first connecting member 31 away from the valve core 20 is flush with the end surface of the valve body 10, and the outer peripheral surface of the first connecting member 31 abuts against the inner wall of the valve body 10. The second connecting member 32 is located outside the valve body 10 and has a first end and a second end that are arranged opposite each other along the axial direction. The first end is disposed closer to the valve core 20. The inner diameter of the second connecting member 32 is smaller than the inner diameter of the first connecting member 31, and the outer diameter of the second connecting member 32 is equal to the outer diameter of the valve body 10. The end surface of the first end forms an abutment surface 3202, which abuts against the end surface of the first connecting member 31 away from the valve core 20 and the end surface of the valve body 10, respectively. The end surface of the first end forms a mounting groove 40 with the inner sidewall of the first connecting member 31. With this arrangement, the first connecting member 31 is entirely located inside the valve body 10 , and the second connecting member 32 is located at the end portion outside the valve body 10 . The overall structural design is relatively reasonable and compact.

[0063] In this solution, when assembling the ball valve, one of the first connecting member 31 and the second connecting member 32 is welded to the valve body 10; and one of the first connecting member 31 and the second connecting member 32 is used to be welded to the connecting pipe 01 of the ball valve.

[0064] During assembly of the embodiment of this solution, the first connecting member 31 and the second connecting member 32 are first welded, and then the first connecting member 31 is inserted into the valve cavity 101, and the end face of the first end of the second connecting member 32 is abutted against the end face of the valve body 10 and welded.

[0065] In this embodiment, a mounting opening 102 is provided on the sidewall of the valve body 10. The mounting opening 102 communicates with the valve cavity 101 and extends perpendicularly to the direction of extension of the valve cavity 101. The ball valve also includes a mounting seat 61 and a valve stem 62. The mounting seat 61 is disposed at the mounting opening 102. The valve stem 62 is rotatably disposed within the mounting seat 61 and extends perpendicularly to the axis of the through hole 201 of the valve core 20. One end of the valve stem 62 is located within the valve cavity 101 and attached to the valve core 20, while the other end of the valve stem 62 is located outside the mounting seat 61. This arrangement facilitates adjustment of the valve core 20.

[0066] In this embodiment, the ball valve further includes a cap 63, which covers the outer periphery of the end of the mounting seat 61 away from the valve body 10 and is threadedly connected to the mounting seat 61. This cap 63, covering the outer periphery of the end of the mounting seat 61 away 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 seat 61 makes installation and removal of the cap 63 simple and quick, facilitating maintenance and inspection.

[0067] Furthermore, the valve body 10, first connecting member 31, and second connecting member 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. Connecting pipe 01 includes a first pipe segment 011 and a second pipe segment 012, which are connected to each other. The end of the first pipe segment 011, distal from the second pipe segment 012, is inserted into the interface 3201, and the first pipe segment 011 and the second connecting member 32 are welded together. The first pipe segment 011 is made of stainless steel, while the second pipe segment 012 is made of copper. This configuration minimizes the use of copper and reduces the cost of the ball valve.

[0068] In the embodiment of this solution, the end of the first tube section 011, which is remote from the second tube section 012, extends through the interface 3201 into the mounting groove 40 and abuts against the end surface of the sealing portion 50, which is remote from the valve core 20. This arrangement allows the end of the first tube section 011, which is remote from the second tube section 012, to provide a certain pre-tightening compressive force on the sealing portion 50, thereby reducing or preventing the sealing portion 50 from rotating as the valve core 20 rotates. This reduces the possibility of the sealing portion 50 being squeezed out or scraped out of the mounting groove 40, reduces the possibility of the sealing portion 50 failing, and improves the stability and sealing effect of the sealing portion 50.

[0069] Specifically, the length of the first pipe section 011 extending into the mounting groove 40 is set to 0.3 mm to 0.5 mm. Specifically, it can be set to 0.3 mm, 0.4 mm or 0.5 mm. When assembling 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, and the relative positions of the first pipe section 011 and the valve cover assembly 30 are determined by special pressing equipment or special fixtures to ensure the assembly accuracy of the first pipe section 011 and the valve cover assembly 30. After that, the first pipe section 011 and the second connector 32 are welded. Specifically, during welding, it can be fixed by laser welding or by furnace brazing. When fixed by furnace brazing, in order to obtain a better penetration effect, a knurling or wire drawing process can be set within a certain length range at the end of the first pipe section 011 that cooperates with the valve cover assembly 30.

[0070] In this embodiment, the end of the first tube section 011, which is closest to the valve core 20, protrudes inwardly relative to the wall of the mounting groove 40 to form a protrusion 0111. The end of the sealing portion 50, which is farther from the valve core 20, has a recess 501 that mates with the protrusion 0111. This arrangement reduces the possibility of deformation of the sealing portion 50 after the first tube section 011 abuts against the sealing portion 50, thereby improving the sealing effect of the sealing portion 50.

[0071] In other embodiments of the present scheme, the end of the sealing portion 50 away from the valve core 20 is a planar structure. When the first pipe section 011 extends into the installation groove 40, the end face of the first pipe section 011 squeezes the sealing portion 50, causing the sealing portion 50 to deform within a certain range.

[0072] like Figures 5 to 8 As shown, the second embodiment of the present invention provides a ball valve, which differs from the first embodiment in that the first end of the second connecting member 32 is inserted into the first connecting member 31, and the end surface of the first end forms a mounting groove 40 with the inner side wall of the first connecting member 31. This arrangement can increase the contact area between the first connecting member 31 and the second connecting member 32, and improve the stability of the connection between the first connecting member 31 and the second connecting member 32.

[0073] Furthermore, the second connecting member 32 includes a third section 321 and a fourth section 322 connected in sequence along the axial direction, the outer diameter of the third section 321 is smaller than the outer diameter of the fourth section 322, the outer diameter of the fourth section 322 is equal to the outer diameter of the valve body 10, and a second step surface is formed between the third section 321 and the fourth section 322, the second step surface forms an abutment surface 3202, the length of the third section 321 is smaller than the length of the first connecting member 31, the third section 321 is arranged in the first connecting member 31, and the abutment surface 3202 respectively abuts against the end face of the first connecting member 31 facing away from the valve core 20 and the end face of the valve body 10.

[0074] When assembling the ball valve, the third section 321 is passed through the first connecting member 31 so that the end face of the first connecting member 31 abuts against the abutting surface 3202, and the first connecting member 31 and the second connecting member 32 are connected by welding. Then, the first connecting member 31 is passed through the valve cavity 101 so that the abutting surface 3202 abuts against the end face of the valve body 10 and is welded.

[0075] like Figures 9 to 12 As shown, the third embodiment of the present invention provides a ball valve, which differs from the second embodiment in that the first connecting member 31 has a first portion and a second portion. The first connecting member 31 includes a first section 311 and a second section 312 connected sequentially along the axial direction. The outer diameter of the first section 311 is smaller than the outer diameter of the second section 312. A first stepped surface 3101 is formed between the first section 311 and the second section 312. The first section 311 is disposed within the valve cavity 101, and the first stepped surface 3101 abuts against the end surface of the valve body 10. This arrangement can increase the contact area between the first connecting member 31 and the valve body 10, thereby enhancing the stability of the connection between the first connecting member 31 and the valve body 10.

[0076] Furthermore, the length of the third section 321 is shorter than that of the first connecting member 31. When assembling the ball valve, the third section 321 is inserted from the end where the second section 312 is located into the first connecting member 31, so that the abutting surface 3202 abuts the end face of the second section 312 away from the first section 311. The first and second connecting members 31 and 32 are then connected by welding. Subsequently, the first section 311 is inserted into the valve cavity 101, so that the first stepped surface 3101 abuts the end face of the valve body 10, and the two are welded together. This arrangement ensures a large 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.

[0077] like Figures 13 to 16 As shown, the fourth embodiment of the present invention provides a ball valve, which differs from the first embodiment in that a mounting groove 40 is provided on the end surface of the first connecting member 31 facing the valve core 20. Specifically, the first connecting member 31 includes a fifth section 313 and a sixth section 314 connected in sequence along the axial direction. The inner diameter of the fifth section 313 is greater than the inner diameter of the sixth section 314, and the outer diameter of the fifth section 313 is equal to the outer diameter of the sixth section 314. The mounting groove 40 is formed between the fifth section 313 and the sixth section 314.

[0078] Specifically, when assembling the ball valve, the end face of the sixth section 314 away from the fifth section 313 is abutted and welded with the abutting surface 3202 of the second connecting member 32. Then, the first connecting member 31 is inserted into the valve cavity 101 so that the abutting surface 3202 is abutted and welded with the cross section of the valve body 10.

[0079] like Figure 17 and Figure 18 As shown, the fifth embodiment of the present invention provides a ball valve, which differs from the first embodiment in 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 is aligned with the inner wall of the valve body 10, and a mounting groove 40 is formed between the end surface of the first connecting member 31 facing the valve core 20 and the inner wall of the valve body 10. This arrangement has a simple structure and is easy to manufacture.

[0080] Specifically, when assembling the ball valve, the end face of one end of the first connecting member 31 is welded to the end face of one end of the second connecting member 32. Then, the first connecting member 31 is inserted into the valve cavity 101, so that the end face of the end of the second connecting member 32 connected to the first connecting member 31 is abutted and welded to the end face of the valve body 10.

[0081] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0083] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0084] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0085] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A ball valve, characterized in that: include: A valve body (10) comprising a valve cavity (101) provided with an opening, wherein the valve cavity (101) passes through the valve body (10); A valve core (20) is provided with a through hole (201), and the valve core (20) is rotatably arranged in the valve cavity (101); A valve cover assembly (30) is provided at the opening, the valve cover assembly (30) being provided with at least a first portion that is in close contact with the inner wall of the valve body (10) and a second portion that is in close contact with the end of the valve body (10); the valve cover assembly (30) has an interface (3201), and the through hole (201) of the valve core (20) is connected to or blocked from the interface (3201) to switch the ball valve open or closed; 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 a side of the first connecting member (31) away from the valve core (20).

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

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

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

5. The ball valve according to claim 1, characterized in that The valve core (20) and the valve cover assembly (30) are configured with a mounting groove (40) toward a position close to the valve core (20), and the mounting groove (40) is coaxial with the interface (3201). The ball valve further comprises: The sealing portion (50) is arranged in the installation groove (40) and abuts against the surface of the valve core (20) to separate 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 connecting member (31) and the second connecting member (32); or, The end surface of the first connecting member (31) facing the valve core (20) is provided with the mounting groove (40); or, The mounting groove (40) is formed between an end surface of the first connecting member (31) facing the valve core (20) and an inner side wall of the valve body (10); Wherein, the installation groove (40) is communicated with the interface (3201), and the cross-sectional area of ​​the installation groove (40) is larger 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 connecting member (31) and the second connecting member (32), and the second connecting member (32) has a first end and a second end arranged opposite to each other along the axial direction, and the first end is close to the valve core (20); The inner diameter of the end surface of the first end is smaller than the inner diameter of the end of the first connecting member (31) away from the valve cavity (101), the end surface of the first end abuts against the end surface of the end of the first connecting member (31) away from the valve core (20), and the end surface of the first end and the inner side wall of the first connecting member (31) form the mounting groove (40); or, The first end of the second connecting member (32) is inserted into the first connecting member (31), and the end surface of the first end and the inner side wall of the first connecting member (31) form the installation groove (40).

8. The ball valve according to claim 1, characterized in that One of the first connecting member (31) and the second connecting member (32) is welded to the valve body (10); and / or, One of the first connecting piece (31) and the second connecting piece (32) is used for welding to the connecting pipe (01) of the ball valve.

9. The ball valve according to claim 1, characterized in that The first connecting member (31) includes a first section (311) and a second section (312) connected in sequence along the axial direction, the outer diameter of the first section (311) is smaller than the outer diameter of the second section (312), a first step surface (3101) is formed between the first section (311) and the second section (312), the first section (311) is arranged in the valve cavity (101), and the first step 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 connecting member (32) includes a third section (321) and a fourth section (322) connected in sequence along the axial direction, the outer diameter of the third section (321) is smaller than the outer diameter of the fourth section (322), and a second step surface is formed between the third section (321) and the fourth section (322). The third section (321) is inserted into the first connecting member (31), and the second step surface abuts against the end surface of the first connecting member (31) that faces away from the valve core (20).

11. The ball valve according to claim 1, characterized in that The first connecting member (31) is inserted into the valve cavity (101), and the second connecting member (32) includes a contact surface (3202), and the end surface of the first connecting member (31) away from the valve core (20) and the end surface of the valve body (10) respectively contact the contact surface (3202).

12. The ball valve according to claim 11, characterized in that The second connecting member (32) comprises a third section (321) and a fourth section (322) connected in sequence along the axial direction, the outer diameter of the third section (321) is smaller than the outer diameter of the fourth section (322), the third section (321) is inserted into the first connecting member (31), and the abutting surface (3202) is formed between the third section (321) and the fourth section (322); or, The second connecting member (32) is located outside the valve body (10), and the end surface of the second connecting member (32) close to one end of the valve core (20) forms the abutting surface (3202).

13. The ball valve according to claim 1, wherein: A mounting port (102) is provided on the side wall of the valve body (10), and the mounting port (102) is communicated with the valve cavity (101). The ball valve further comprises: A mounting seat (61) is provided at the mounting opening (102); A valve stem (62) is rotatably disposed in the mounting seat (61), and one end of the valve stem (62) is located in the valve cavity (101) and is disposed on the valve core (20).

14. The ball valve according to claim 5, characterized in that The ball valve further comprises: A connecting pipe (01), the connecting pipe (01) 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, an end of the first pipe section (011) away from the second pipe section (012) is inserted into the interface (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 from the interface (3201) into the installation groove (40) and abuts against the end surface of the sealing portion (50) away from the valve core (20).

16. The ball valve according to claim 15, characterized in that The end of the first pipe section (011) close to the valve core (20) is protruded inward relative to the groove wall of the installation groove (40) to form a convex portion (0111), and the end of the sealing portion (50) away from the valve core (20) has a concave portion (501), and the concave portion (501) and the convex portion (0111) are adapted to each other.

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