Ball valve

Abstract

The utility model relates to the technical field of valves, in particular to a ball valve which comprises a valve body, a valve ball installed in a valve cavity of the valve body and a valve rod connected with the valve body, and the valve body is provided with a first channel and a second channel which are perpendicular to each other. A connecting column rotationally connected to the valve body is arranged at the end, away from the valve rod, of the valve ball, and a first flow channel communicating with the first channel is formed in the connecting column. And a plurality of second flow channels with different diameters are formed in the valve ball, all communicate with the first flow channel and are perpendicular to the axis of the valve rod, and different second flow channels are switched to communicate with the second channel in the rotating process of the valve ball.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a ball valve. Background Technology

[0002] As a core control element in industrial pipeline systems, the development of ball valves can be traced back to the 1950s. The traditional ball valve structure mainly consists of a valve body, a valve ball, and a valve stem. Its working principle is that the actuator drives the valve stem to rotate the valve ball around the axis by 0-90°. The change in the relative position of the valve ball through-hole and the valve body flow channel realizes the opening and closing of the medium and the regulation of the flow rate.

[0003] Current flow control methods primarily rely on the geometric relationship between the valve ball rotation angle and the flow channel opening. While this structure enables stepless control, it cannot achieve precise control, making it unsuitable for applications requiring multiple precise opening degrees. Utility Model Content

[0004] To achieve precise control of various opening degrees, this application provides a ball valve.

[0005] The ball valve provided in this application adopts the following technical solution:

[0006] A ball valve includes a valve body, a valve ball installed in a valve cavity of the valve body, and a valve stem connected to the valve body. The valve body has two mutually perpendicular first channels and second channels. The valve ball has a connecting post rotatably connected to the valve body at one end away from the valve stem. The connecting post has a first flow channel communicating with the first channel. The valve ball has multiple second flow channels of different diameters. All of the multiple second flow channels communicate with the first flow channels and are perpendicular to the axis of the valve stem. During the rotation of the valve ball, different second flow channels are switched to communicate with the second channels.

[0007] In one embodiment, a positioning structure is provided between the valve stem and the valve body for positioning different second flow channels and communicating with the second channel.

[0008] In one embodiment: the positioning structure includes a limiting groove on the valve body and an elastic pin on the valve stem for swinging in the limiting groove, wherein the inner wall of the limiting groove is provided with a positioning groove into which the end of the elastic pin can be engaged.

[0009] In one embodiment: the diameter of the second flow channel is arranged from largest to smallest along the axis of the valve stem, and the central axis of the elastic pin, the central axis of the second flow channel with the largest or smallest diameter, and the central axis of the valve stem are located on the same plane.

[0010] In one embodiment: the limiting groove has a C-shaped structure, and when the elastic pin moves to the end of the limiting groove, the second flow channel with the largest or smallest diameter is connected to the second channel.

[0011] In one embodiment, the positioning groove is configured as a damped arc-shaped structure that can be formed after the elastic pin is inserted.

[0012] In one embodiment: the outer edge of the limiting groove is provided with a raised guide protrusion, and the guide protrusion is provided with a guide slope that mates with the limiting groove.

[0013] In one embodiment: a first sealing ring is embedded at one end of the second channel facing the valve ball, and the opening of the second flow channel is provided with a rounded chamfer.

[0014] In one embodiment: the valve body includes a main body and a valve cover, and the limiting groove is provided on the inner wall of the valve cover.

[0015] In one embodiment: the valve cover includes a first cover body connected to the main body and a second cover body connected to the first cover body, a second sealing ring is provided between the first cover body and the second cover body, and the second sealing ring is sleeved on the valve stem.

[0016] In summary, this application has the following beneficial effects:

[0017] 1. By adopting a vertical first and second channel, combined with multiple second flow channels of different diameters, the valve ball can switch between different diameter second flow channels for connection after rotation, thereby providing precise flow control.

[0018] 2. Through the positioning structure, it is possible to know whether the second flow channel and the second channel are fully connected during the rotation of the valve stem, thereby ensuring the accuracy of the connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the ball valve in this embodiment;

[0020] Figure 2 This is a front sectional view of the ball valve in this embodiment;

[0021] Figure 3 This is a schematic diagram of the structure of the ball and stem in the ball valve of this embodiment;

[0022] Figure 4 This is in this embodiment Figure 2 Enlarged view of part A;

[0023] Figure 5 This is a schematic diagram of the valve cover of the ball valve in this embodiment.

[0024] In the diagram, 100 is the valve body; 110 is the main body; 120 is the valve cover; 121 is the first cover; 1211 is the limiting groove; 1212 is the positioning groove; 1213 is the guide protrusion; 122 is the second cover; 123 is the second sealing ring; 130 is the valve cavity; 140 is the sealing gasket; 150 is the first channel; 160 is the second channel; 200 is the valve stem; 300 is the valve ball; 310 is the connecting column; 311 is the first flow channel; 312 is the second flow channel; 400 is the connecting flange; 500 is the first sealing ring; 600 is the third sealing ring; and 700 is the elastic pin. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0027] A type of ball valve, such as Figure 1 and Figure 2 As shown, the valve includes a valve body 100, a valve ball 300, and a valve stem 200. The valve body 100 includes a main body 110 and a valve cover 120. The main body 110 is provided with a valve cavity 130. The valve cover 120 is fixedly installed on the main body 110 by bolts and closes the opening of the valve cavity 130.

[0028] The valve ball 300 is installed in the valve cavity 130 of the valve body 100. One end of the valve stem 200 is connected to the valve ball 300, and the other end extends out of the valve body 100 through the valve cover 120.

[0029] The valve cover 120 includes a first cover 121 and a second cover 122. The first cover 121 is connected to the main body 110 by bolts. A sealing gasket 140 is provided in front of the first cover 121 and the main body 110 to ensure the sealing performance after the valve cover 120 is closed.

[0030] The first cover 121 and the second cover 122 are also connected by bolts. The first cover 121 has an embedding groove in which a second sealing ring 123 is embedded. The valve stem 200 passes through the first cover 121 and the second cover 122 in sequence within the valve cavity 130, and the valve stem 200 passes through the second sealing ring 123. The second sealing ring 123 is pressed against the first cover 121 by the second cover 122.

[0031] Reference Figure 2The valve body 100 is provided with two mutually perpendicular first channels 150 and second channels 160. Both the first channel 150 and the second channel 160 connect the inside and outside of the valve body 100. A connecting flange 400 is provided at the end of the first channel 150 and the second channel 160 located outside the valve body 100.

[0032] The first channel 150 is located at the bottom of the main body 110 and at the center of the main body 110. The second channel 160 is located on the side wall of the main body 110.

[0033] The second channel 160 is provided with a first sealing ring 500 at one end facing the valve ball 300, which abuts against the valve ball 300.

[0034] like Figure 2 and Figure 3 As shown, the valve ball 300 has a connecting post 310 rotatably connected to the valve body 100 at the end away from the valve stem 200. A third sealing ring 600 is provided between the connecting post 310 and the valve body 100. A first flow channel 311 communicating with the first channel 150 is provided inside the connecting post 310.

[0035] The valve ball 300 is provided with multiple second flow channels 312 of different diameters. All the second flow channels 312 are connected to the first flow channel 311 and are perpendicular to the axis of the valve stem 200. During the rotation of the valve ball 300, different second flow channels 312 are switched to connect with the second channel 160.

[0036] Among them, the opening of the second flow channel 312 is provided with a rounded chamfer. The rounded chamfer design is used to prevent the opening of the second flow channel 312 from causing wear to the first sealing ring 500 during the rotation of the valve ball 300.

[0037] like Figure 2 and Figure 4 A positioning structure is provided between the valve stem 200 and the valve body 100 to position the second flow channel 312 and the second channel 160 connected to each other. The positioning structure is used to provide positioning, but it cannot lock the valve stem 200. That is, the valve stem 200 can continue to rotate with a certain force. Therefore, the positioning structure is more for providing sensing, that is, the operator can know that the second flow channel 312 and the second channel 160 have been aligned.

[0038] Specifically, the positioning structure includes a limiting groove 1211 on the valve body 100 and an elastic pin 700 on the valve stem 200 for swinging in the limiting groove 1211, wherein the limiting groove 1211 is located on the inner wall of the first cover 121.

[0039] Combined with appendix Figure 5The inner wall of the limiting groove 1211 is provided with a positioning groove 1212 into which the end of the elastic pin 700 can be inserted. The positioning groove 1212 is a damping arc-shaped structure that can be formed after the elastic pin 700 is inserted.

[0040] In addition, to make it easier for the operator to identify which second flow channel 312 is being used, the diameter of the flow channel is designed to be set from largest to smallest around the axis of the valve stem 200, either clockwise or counterclockwise.

[0041] Furthermore, the limiting groove 1211 is designed with a C-shaped structure. When the elastic pin 700 moves to the end of the limiting groove 1211, the second flow channel 312 with the largest or smallest diameter connects with the second channel 160. At the same time, it is required that the central axis of the elastic pin 700, the central axis of the second flow channel 312 with the largest or smallest diameter, and the central axis of the valve stem 200 are located on the same plane.

[0042] See attached document Figure 5 The outer edge of the limiting groove 1211 is provided with a raised guide protrusion 1213. The guide protrusion 1213 is provided with a guide slope that mates with the limiting groove 1211. By setting the guide protrusion 1213, when the valve cover 120 is installed, the elastic pin 700 will interfere with the valve cover 120 and cannot enter the limiting groove 1211 because it is in the extended state. However, by designing the guide protrusion 1213, the elastic pin 700 can be guided by the guide protrusion 1213, so that it can enter the limiting groove 1211 conveniently and quickly.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ball valve comprising a valve body (100), a valve ball (300) installed in a valve cavity (130) of the valve body (100), and a valve stem (200) connected with the valve body (100), characterized in that: The valve body (100) is provided with a first channel (150) and a second channel (160) arranged perpendicularly to each other, the valve ball (300) is provided with a connecting column (310) rotatably connected to the valve body (100) at one end away from the valve rod (200), and the connecting column (310) is provided with a first flow channel (311) in communication with the first channel (150); the valve ball (300) is provided with a plurality of second flow channels (312) with different diameters, and the plurality of second flow channels (312) are in communication with the first flow channel (311) and perpendicular to the axis of the valve rod (200), and different second flow channels (312) are switched to be in communication with the second channel (160) during rotation of the valve ball (300).

2. A ball valve according to claim 1, characterised in that: The valve rod (200) and the valve body (100) are provided with a positioning structure for positioning different second flow channels (312) in communication with the second channel (160).

3. A ball valve according to claim 2, characterised in that: The positioning structure comprises a limiting groove (1211) provided on the valve body (100) and an elastic pin (700) provided on the valve rod (200) for swinging in the limiting groove (1211), and the inner wall of the limiting groove (1211) is provided with a positioning groove (1212) for clamping the end of the elastic pin (700).

4. A ball valve according to claim 3, characterised in that: The diameters of the second flow channels (312) are arranged in the order from large to small around the axis of the valve rod (200), and the central axis of the elastic pin (700) is in the same plane as the central axis of the second flow channel (312) with the largest or smallest diameter and the central axis of the valve rod (200).

5. A ball valve according to claim 4, characterised in that: The limiting groove (1211) has a C-shaped structure, and when the elastic pin (700) moves to the end of the limiting groove (1211), the second flow channel (312) with the largest or smallest diameter is in communication with the second channel (160).

6. A ball valve according to claim 3, characterised in that: The positioning groove (1212) has an arc-shaped structure that can form damping after the elastic pin (700) is clamped.

7. A ball valve according to claim 3, characterised in that: The outer side edge of the limiting groove (1211) is provided with a protruding guide protrusion (1213), and the guide protrusion (1213) is provided with a guide inclined surface in abutment with the limiting groove (1211).

8. A ball valve according to claim 1, characterized in that: The end of the second channel (160) towards the valve ball (300) is embedded with a first sealing ring (500) in abutment with the valve ball (300), and the opening of the second flow channel (312) is provided with a circular arc chamfer.

9. A ball valve according to claim 3, characterized in that: The valve body (100) comprises a main body (110) and a valve cover (120), and the limiting groove (1211) is provided on the inner wall of the valve cover (120).

10. A ball valve according to claim 9, characterised in that: The valve cover (120) comprises a first cover body (121) connected to the main body (110) and a second cover body (122) connected to the first cover body (121), and a second sealing ring (123) is arranged between the first cover body (121) and the second cover body (122), and the second sealing ring (123) is sleeved on the valve rod (200).

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