Ball valve

Abstract

The utility model relates to the technical field of valves, and discloses a ball valve. The ball valve comprises a valve body, a valve seat, a valve element and a lining, wherein a first channel is formed in the valve body; the valve seat is arranged in the valve body; the valve element is rotationally arranged in the valve body and can be matched with the valve seat to selectively open and close the first channel. The lining is welded in the valve body and abuts against the end, away from the valve element, of the valve seat. The ball valve is short in production period and high in production efficiency. Besides, the lining and the valve body are connected in a welding mode, the stability of connection between the lining and the valve body can be improved, so that the lining abuts against the valve seat, the effect of limiting the valve seat is achieved, it is guaranteed that the valve seat has the determined compression amount so as to be tightly pressed on the valve element, and it is avoided that when the valve element rotates, a gap is generated between the valve element and the valve seat, and normal use of the ball valve is affected.

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 primarily used to cut off or connect fluids, as well as to regulate and control them. Due to their excellent sealing properties and compact size, they are widely used in piping systems. A ball valve typically consists of a valve body, a valve core, a valve bonnet, and a valve seat. The valve core is rotatably mounted within the valve body and engages with the valve seat within the body to open and close the pipeline. Valve bonnets are threaded onto both ends of the valve body to connect the ball valve to the piping system. Depending on the number of bonnets, ball valves are typically categorized as two-piece or three-piece. Ball valves with one bonnet are considered two-piece, while those with two bonnets are considered three-piece.

[0003] In the prior art, the valve body and the valve cover are usually manufactured using a precision casting process, which results in a long production cycle of the entire ball valve and high processing costs.

[0004] Therefore, it is urgent to propose a ball valve to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a ball valve, which can reduce the process difficulty and processing cost, shorten the production cycle and improve production efficiency.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] A ball valve, comprising:

[0008] a valve body having a first passage therein;

[0009] a valve seat, disposed in the valve body;

[0010] a valve core rotatably disposed in the valve body and capable of cooperating with the valve seat to selectively open and close the first passage;

[0011] A bushing is welded in the valve body and abuts against an end of the valve seat away from the valve core.

[0012] As a preferred solution, the valve body is a stainless steel tube.

[0013] As a preferred solution, the bushing is made of stainless steel.

[0014] As a preferred solution, a stepped third channel is opened in the bushing, the third channel is connected to the first channel, the small diameter section of the third channel is arranged close to the valve seat, and the inner wall of the large diameter section of the third channel is provided with a connecting structure for connecting to an external pipeline.

[0015] As a preferred solution, a spacer is provided between the bushing and the valve seat.

[0016] As a preferred solution, the spacer is a gasket.

[0017] As a preferred solution, the ball valve further includes an adjusting assembly, and the adjusting assembly is configured to drive the valve core to rotate.

[0018] As a preferred solution, the adjustment component includes:

[0019] a valve stem, one end of which can pass through the valve body and be connected to the valve core;

[0020] A handle is connected to one end of the valve stem away from the valve core. Rotating the handle can drive the valve core to rotate through the valve stem to selectively open and close the first channel.

[0021] As a preferred solution, the ball valve further comprises a valve cover connected to an end of the valve body away from the bushing.

[0022] As a preferred solution, the valve cover is threadedly connected to the valve body.

[0023] The beneficial effects of the utility model are:

[0024] 1) The ball valve provided by the present invention has a built-in bushing structure at one end, which can shorten the overall length of the ball valve so as to facilitate installation in a narrow installation environment.

[0025] 2) The bushing and the valve body are connected by welding, which can improve the stability of the connection between the two, so that the bushing is pressed against the valve seat, thereby playing the role of limiting the valve seat and ensuring that the valve seat has a certain amount of compression to press against the valve core, avoiding the gap between the valve core and the valve seat when rotating, affecting the normal use of the ball valve.

[0026] 3) The ball valve provided by the present invention has a valve body that is directly cut from a pipe (usually made of stainless steel) and does not require precision casting, thereby shortening the production cycle and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a ball valve provided in Example 1 of the present utility model;

[0028] Figure 2 This is a cross-sectional schematic diagram of the ball valve provided in Example 1 of the present utility model;

[0029] Figure 3 This is a schematic diagram of the exploded structure of the ball valve provided in the first embodiment of the present invention at one viewing angle;

[0030] Figure 4 This is a schematic diagram of the exploded structure of the ball valve provided in the first embodiment of the present utility model from another perspective;

[0031] Figure 5 This is a schematic structural diagram of a ball valve provided in the second embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional schematic diagram of a ball valve provided in Example 2 of the present utility model;

[0033] Figure 7 It is a schematic diagram of the explosion structure of the ball valve provided in the second embodiment of the present utility model.

[0034] In the picture:

[0035] 100, valve body; 101, first channel; 102, installation port;

[0036] 200, valve seat; 201, through hole;

[0037] 300, valve core; 301, second channel; 302, plug-in slot;

[0038] 400, bushing; 401, third channel;

[0039] 500, spacer;

[0040] 600, adjustment assembly; 610, valve stem; 620, handle; 621, first limiting portion; 622, second limiting portion; 630, sleeve; 631, first limiting protrusion; 632, second limiting protrusion; 640, sealing member; 650, locking member;

[0041] 700. Valve cover. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0043] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0046] Example 1

[0047] Figure 1 A schematic structural diagram of the ball valve provided in this embodiment is shown. Figure 2 FIG. 1 shows a cross-sectional schematic diagram of the ball valve provided in this embodiment. Figure 1-Figure 2As shown, this embodiment provides a ball valve, which includes a valve body 100, a valve seat 200, and a valve core 300. The valve body 100 has a first channel 101, the valve seat 200 is disposed within the valve body 100, and the valve seat 200 has a through hole 201. The valve core 300 has a second channel 301. The valve core 300 is rotatably disposed within the first channel 101 and can cooperate with the valve seat 200 to selectively open and close the first channel 101. When the ball valve is in use, when the valve core 300 rotates until the second channel 301 intersects the through hole 201 of the valve seat 200, the ball valve is in an open state; when the valve core 300 rotates until the second channel 301 is offset from the through hole 201 of the valve seat 200, the ball valve is in a closed state. In addition, as the valve core 300 rotates, the intersection range between the second channel 301 and the through hole 201 of the valve seat 200 also changes, and the fluid flow through the first channel 101 also changes, thereby achieving control of the pipeline flow.

[0048] Optionally, the valve seat 200 is an annular rubber pad, which can fit tightly with the valve core 300 through its own deformation to achieve sealing between the two. The valve seat 200 made of rubber material can also reduce the wear between the two when the valve core 300 rotates, thereby extending the service life of the ball valve.

[0049] In the prior art, in order to connect the ball valve to the pipeline, a valve cover needs to be provided on the valve body 100 , and the valve cover is usually manufactured by a precision casting process, resulting in a long production cycle of the entire ball valve and high processing costs.

[0050] To solve the above problems, Figure 2 As shown, the ball valve further includes a bushing 400 , which is welded inside the valve body 100 and abuts against one end of the valve seat 200 away from the valve core 300 . The bushing 400 is used to connect to an external pipeline. By using a built-in bushing 400 at one end of the valve body 100 and connecting the ball valve to the pipeline system through the bushing 400, the overall length of the ball valve can be shortened, making it easier to install in confined installation environments. Secondly, operators can directly use readily available bushings 400 on the market, simplifying the processing steps, reducing process difficulty and processing costs, while also shortening the production cycle and improving production efficiency. In addition, the bushing 400 and the valve body 100 are connected by welding, which can also improve the stability of the connection between the two. The bushing 400 is pressed tightly against the valve seat 200, thereby acting as a limiter for the valve seat 200, ensuring that the valve seat 200 has a certain amount of compression to press against the valve core 300, and preventing the valve core 300 from generating a gap between the valve seat 200 and the valve core 300 during rotation, which may affect the normal operation of the ball valve. Optionally, the bushing 400 is made of stainless steel to avoid the problem of heavy metal precipitation in the ball valve caused by the bushing 400 being made of copper, thereby ensuring its safety during use.

[0051] To facilitate machining of the bushing 400, a stepped third channel 401 is defined within the bushing 400. The third channel 401 communicates with the first channel 101. The smaller diameter section of the third channel 401 is positioned adjacent to the valve seat 200, while the inner wall of the larger diameter section of the third channel 401 is provided with a connection structure for connecting to an external pipeline. In other words, the ball valve in this embodiment is connected to an external pipeline via the bushing 400. The connection structure, consisting of internal threads disposed on the inner wall of the larger diameter section of the third channel 401, provides a secure connection and facilitates assembly and disassembly. Furthermore, by providing the connection structure on the inner wall of the larger diameter section of the third channel 401, machining of the internal threads on the third channel 401 is facilitated, providing ample space for tool entry and exit. By locating the smaller diameter section of the third channel 401 adjacent to the valve seat 200, the contact area between the bushing 400 and the valve seat 200 is increased, further enhancing the bushing's ability to retain the valve seat 200.

[0052] Figure 3 The exploded structure diagram of the ball valve provided in this embodiment is shown in FIG. Figure 3 Combined with Figure 2 As shown, in this embodiment, the valve body 100 is a stainless steel tube. Compared to the conventional method of forming valve bodies through precision casting, the valve body 100 in this embodiment can be directly cut from a pipe, thereby reducing the processing difficulty and processing costs, while also shortening the production cycle and improving production efficiency. In addition, the valve body 100 is made of stainless steel, which can avoid the problem of heavy metal precipitation in the ball valve caused by the valve body 100 being made of copper, thereby ensuring its safety during use.

[0053] Figure 4 FIG. 1 shows a schematic diagram of the explosion structure of the ball valve provided in this embodiment from another perspective. Figure 4 Combined with Figure 2 、 Figure 3As shown, the ball valve further includes a valve cover 700, which is connected to the end of the valve body 100 away from the bushing 400. Specifically, in this embodiment, there are two valve seats 200, one located on either side of the valve core 300. The bushing 400 is positioned on the side of one valve seat 200 away from the valve core 300, while the valve cover 700 is positioned on the side of the other valve seat 200 away from the valve core 300. In other words, when the ball valve provided in this embodiment is connected to a pipeline system, the bushing 400 is used to connect to the pipeline on one side, and the valve cover 700 is used to connect to the pipeline on the other side. During use, as the valve core 300 rotates, when one end of the second channel 301 on the valve core 300 faces the through-hole 201 of one valve seat 200, and the other end of the second channel 301 faces the through-hole 201 of the other valve seat 200, the fluid flow rate in the ball valve reaches its maximum. When one end of the second channel 301 on the valve core 300 is completely offset from the through-hole 201 of one valve seat 200, and the other end of the second channel 301 is completely offset from the through-hole 201 of the other valve seat 200, the ball valve is in a closed state. By providing two valve seats 200 and the valve core 300 to cooperate with each other to achieve fluid flow in the ball valve, the uniformity of the force on the valve seat 200 can be further ensured, thereby achieving a good sealing effect between the valve seat 200 and the valve core 300.

[0054] In some embodiments, the valve cover 700 is welded to the valve body 100 for easy installation and a secure connection. Of course, in other embodiments, the valve cover 700 can also be threaded onto the valve body 100. If the valve seat 200 becomes worn after prolonged use, the operator can easily remove the valve cover 700 from the valve body 100 to replace the damaged valve seat 200, thereby reducing the maintenance and replacement costs of the ball valve.

[0055] It should be noted that this embodiment does not limit the specific structure and molding process of the valve cover 700. The operator can choose any type of valve cover 700 in the prior art to adapt to the corresponding pipeline system.

[0056] Continue as Figure 2-Figure 4As shown, to achieve rotational adjustment of the valve core 300 within the valve body 100, the ball valve further includes an adjustment assembly 600, which is configured to drive the valve core 300 to rotate. Specifically, the adjustment assembly 600 includes a valve stem 610 and a handle 620. One end of the valve stem 610 can pass through the valve body 100 and connect to the valve core 300; the handle 620 is connected to the end of the valve stem 610 facing away from the valve core 300. Rotating the handle 620 can drive the valve core 300 to rotate via the valve stem 610, thereby selectively opening and closing the first channel 101. During use, an operator can grasp the handle 620 and rotate it, thereby driving the valve core 300 to rotate via the valve stem 610, thereby opening and closing the first channel 101 or adjusting the flow of fluid through the first channel 101.

[0057] Optionally, a plug-in groove 302 is provided on the valve core 300, and one end of the valve stem 610 can be plugged into the plug-in groove 302 to achieve a fixed connection between the valve core 300 and the valve stem 610, which has a simple structure and is easy to assemble.

[0058] The regulating assembly 600 further includes a sleeve 630. The valve body 100 is provided with a mounting opening 102 that communicates with the first passage 101. The sleeve 630 is mounted in the mounting opening 102. The valve stem 610 is disposed within the sleeve 630 and is rotatable relative to the sleeve 630. Optionally, the sleeve 630 can be fixed to the valve body 100 by welding or threaded connection. This embodiment does not limit the connection method between the sleeve 630 and the valve body 100.

[0059] To prevent the fluid in the first channel 101 from leaking from the gap between the sleeve 630 and the valve stem 610 through the installation port 102, at least one seal 640 is provided between the sleeve 630 and the valve stem 610. The seal 640 is specifically a rubber sealing ring, which has good sealing effect and low cost.

[0060] Optionally, the adjustment assembly 600 further includes a locking member 650. The end of the valve stem 610 away from the valve core 300 extends out of the sleeve 630. The handle 620 is sleeved on the end of the valve stem 610 extending out of the sleeve 630. The locking member 650 is mounted on the valve stem 610 and can clamp the handle 620 between the sleeve 630 and the locking member 650. In this embodiment, a screw segment is provided at the top of the valve stem 610. The locking member 650 is a nut. The handle 620 is sleeved on the valve stem 610, and the nut is screwed onto the screw segment, thereby mounting the handle 620 on the valve stem 610 and preventing the handle 620 from falling off the valve stem 610.

[0061] like Figure 3-Figure 4As shown, in order to limit the rotation angle of the handle 620, a first limiting portion 621 is provided on the handle 620, and a first limiting protrusion 631 corresponding to the first limiting portion 621 is provided on the outer wall of the sleeve 630. When the first limiting portion 621 abuts against the first limiting protrusion 631, the fluid flow through the first channel 101 is maximum. At this time, the second channel 301 of the valve core 300 is directly opposite to the through hole 201 of the valve seat 200; a second limiting portion 622 is provided on the handle 620, and a second limiting protrusion 632 corresponding to the second limiting portion 622 is provided on the outer wall of the sleeve 630. When the second limiting portion 622 abuts against the second limiting protrusion 632, the first channel 101 is closed. At this time, the second channel 301 of the valve core 300 is completely staggered with the through hole 201 of the valve seat 200.

[0062] Example 2

[0063] This embodiment provides a ball valve, the specific structure of which is substantially the same as that of the ball valve provided in the first embodiment, except that the bushing 400 and the valve seat 200 are spaced apart.

[0064] Figure 5 A schematic structural diagram of the ball valve provided in this embodiment is shown. Figure 6 A schematic cross-sectional view of the ball valve provided in this embodiment is shown. Figure 7 FIG. 1 shows a schematic diagram of the exploded structure of the ball valve provided in this embodiment. Figure 5-Figure 7 As shown, a spacer 500 is provided between the bushing 400 and the valve seat 200. This design, on the one hand, reduces the length of the bushing 400 along the first channel 101, reduces material consumption, and thus reduces material costs. On the other hand, it also reduces friction and collision between the bushing 400 and the valve seat 200, thereby extending the service life of the bushing 400 and the valve seat 200 and reducing the maintenance cost of the ball valve.

[0065] like Figure 7 As shown, in this embodiment, the spacer 500 is an annular structure to allow the fluid in the first channel 101 to pass normally. In addition, the annular spacer 500 contacts the valve seat 200, ensuring uniform force on the valve seat 200 in the circumferential direction, thereby preventing deformation of the valve seat 200, further ensuring the seal between the valve seat 200 and the valve core 300, and extending the service life of the valve seat 200. Optionally, the spacer 500 is a gasket, which is easy to install and has low cost.

[0066] This embodiment does not limit the thickness of the spacer 500 , and the operator can select spacers 500 of different thicknesses according to actual installation requirements.

[0067] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball valve, characterized in that: include: a valve body (100) having a first passage (101) therein; A valve seat (200) is disposed in the valve body (100); a valve core (300) rotatably disposed in the valve body (100) and capable of cooperating with the valve seat (200) to selectively open and close the first channel (101); A bushing (400) is welded inside the valve body (100) and abuts against an end of the valve seat (200) facing away from the valve core (300).

2. The ball valve according to claim 1, characterized in that The valve body (100) is a stainless steel tube.

3. The ball valve according to claim 1, characterized in that The bushing (400) is made of stainless steel.

4. The ball valve according to claim 1, characterized in that A stepped third channel (401) is provided in the bushing (400), the third channel (401) is connected to the first channel (101), the small diameter section of the third channel (401) is arranged close to the valve seat (200), and the inner wall of the large diameter section of the third channel (401) is provided with a connection structure for connecting to an external pipeline.

5. The ball valve according to claim 1, characterized in that A spacer (500) is provided between the bushing (400) and the valve seat (200).

6. The ball valve according to claim 5, characterized in that The spacer (500) is a gasket.

7. The ball valve according to claim 1, characterized in that The ball valve further comprises an adjusting assembly (600), and the adjusting assembly (600) is configured to drive the valve core (300) to rotate.

8. The ball valve according to claim 7, characterized in that The adjustment assembly (600) comprises: a valve stem (610), one end of which can pass through the valve body (100) and be connected to the valve core (300); A handle (620) is connected to one end of the valve stem (610) away from the valve core (300). Rotating the handle (620) can drive the valve core (300) to rotate through the valve stem (610) to selectively open and close the first channel (101).

9. The ball valve according to any one of claims 1 to 8, characterized in that: The ball valve further comprises a valve cover (700), wherein the valve cover (700) is connected to an end of the valve body (100) away from the bushing (400).

10. The ball valve according to claim 9, characterized in that The valve cover (700) is threadedly connected to the valve body (100).

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