A ball valve

Abstract

This utility model discloses a ball valve, including a valve body and a ball disposed therein. A valve stem is provided on the valve body, with one end of the valve stem passing through the valve body and connected to the outer wall of the ball. Sealing rings are provided at opposite ends of the ball inside the valve body. The valve stem is hollow, with a hollow cylinder at one end inside the valve body connected to the outer wall of the ball. A support ring is fitted on the outer wall of the sealing ring and slidably connected to the inside of the valve body. A driving rod is provided on the valve stem, and a conical block is provided inside the hollow cylinder and connected to the driving rod. A sliding driving component is mounted on the outer wall of the conical block, with one end of the driving component passing through the hollow cylinder and connected to the support ring. When driven, the conical block can drive the driving component to move horizontally reciprocally along the length of the valve body. In traditional valves, the ball is always in contact with the sealing ring during rotation, resulting in significant wear on both the ball and the sealing ring and affecting their service life. This utility model avoids wear caused by the ball's rotation by using the movable design of the sealing ring.

Description

Technical Field

[0001] This utility model relates to the technical field of ball valve components, and in particular to a ball valve. Background Technology

[0002] Ball valves are a common type of valve, mainly used in pipeline systems to cut off, distribute, and change the flow direction of media. Ball valves are characterized by simple structure, good sealing performance, easy operation, and quick opening and closing. There are various types of ball valves, including pneumatic ball valves, electric ball valves, and manual ball valves. The appropriate type should be selected according to different application requirements.

[0003] In traditional ball valves, the opening and closing element is a hollow ball. The valve is opened and closed by rotating the ball 90 degrees by the valve stem. To prevent water leakage from the gap between the ball and the valve body, sealing rings are usually installed on the front and back sides of the inner wall of the ball valve body. When the ball rotates, its outer wall comes into contact with the sealing ring, thus achieving a sealing effect. However, there is constant contact and friction between the ball and the sealing ring during the rotation process, which causes serious wear on both the ball and the sealing ring, affecting the service life of the ball and the sealing ring. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a ball valve.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A ball valve includes a valve body and a ball disposed therein. A valve stem is disposed on the valve body, one end of which passes through the valve body and is connected to the outer wall of the ball. Sealing rings are disposed at opposite ends of the ball inside the valve body. The valve stem is hollow, and a hollow cylinder is disposed at one end inside the valve body and connected to the outer wall of the ball. A support ring is sleeved on the outer wall of the sealing ring and slidably connected to the inside of the valve body. A driving rod is disposed on the valve stem. A conical block is disposed inside the hollow cylinder and connected to the driving rod. A sliding driving member is disposed on the outer wall of the conical block. One end of the driving member passes through the hollow cylinder and is connected to the support ring. The conical block, when driven, can drive the driving member to move horizontally reciprocally along the length direction of the valve body.

[0006] Preferably, the driving component includes a sliding rod slidably connected to the outer wall of the conical block and an extension rod located outside the hollow cylinder. An arc-shaped block is provided at one end of the extension rod facing the hollow cylinder, and one end of the sliding rod passes through the hollow cylinder and is slidably connected to the inner wall of the arc-shaped block. A sliding groove is provided on the extension rod, and a slider is provided on the inner wall of the valve body and is slidably connected to the sliding groove.

[0007] Preferably, a fixing plate is provided on the outer wall of one end of the sliding rod inside the hollow cylinder, and a telescopic cover is sleeved on the outer wall of the sliding rod. One end of the telescopic cover is connected to the inner wall of the hollow cylinder, and the other end is connected to the fixing plate.

[0008] Preferably, a telescopic cover is fitted on the outer wall of the support ring, with one end of the telescopic cover connected to the inner wall of the valve body and the other end connected to the outer wall of the support ring.

[0009] Preferably, one end of the driving rod is rotatably connected to the conical block, and the end of the driving rod away from the conical block is screwed to the valve stem.

[0010] Preferably, the actuator is provided with a knob at one end outside the valve stem.

[0011] The beneficial effects of this utility model are as follows: By sleeved with a support ring on the outer wall of the sealing ring and slidably connected to the inner wall of the valve body, and screwed onto the valve stem, a driving rod is provided on the valve stem. A hollow cylinder is provided at one end inside the valve body, and a conical block is provided at the hollow cylinder and connected to the driving rod. A driving component is connected to the support ring on the outer wall of the conical block. Thus, by rotating the driving rod, the sealing ring is indirectly driven to fit or move away from the ball. Compared with the prior art, this utility model can keep the sealing ring inside the valve body away from the surface of the ball when rotating the ball, and avoid contact with it, thus avoiding unnecessary frictional wear between the two and reducing the impact on the service life of the sealing ring and the ball. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram illustrating the upper part of the valve body mechanism in one embodiment of the present invention;

[0013] Figure 2 This is a cross-sectional view of the internal and external mechanisms of the valve body in one embodiment of the present invention.

[0014] Figure 3 for Figure 2 Enlarged view of section A;

[0015] Figure 4 for Figure 2 Enlarged view of section B;

[0016] Figure 5 This is an exploded view of the upper part of the valve body mechanism in one embodiment of the present invention.

[0017] Reference numerals in the attached diagram: 1. Valve body; 2. Ball; 3. Valve stem; 4. Sealing ring; 5. Hollow cylinder; 6. Support ring; 7. Driving rod; 8. Conical block; 9. Sliding rod; 10. Extension rod; 11. Arc block; 12. Slide groove; 13. Sliding block; 14. Fixing plate; 15. Telescopic cover one; 16. Telescopic cover two; 17. Knob. Detailed Implementation

[0018] The following description is only a preferred embodiment of the present utility model. The scope of protection is not limited to this embodiment. All technical solutions that fall within the scope of the present utility model should be protected by the present utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present utility model should also be considered within the scope of protection of the present utility model.

[0019] It should be noted that in this document, relational terms such as first and second, or "connecting plate one, connecting plate two," are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0020] The directional terms mentioned in this embodiment, such as "up," "down," "left," and "right," are merely used to help those skilled in the art understand the relationships between various features or parts in conjunction with the accompanying drawings.

[0021] In this embodiment, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figures 1 to 5As shown, a ball valve includes a valve body 1 and a ball 2 disposed inside it. In this embodiment, the valve body 1 is integrally die-cast. A valve stem 3 is disposed on the valve body 1, and the tail end of the valve stem 3 passes into the interior of the valve body 1 and is connected to the outer wall of the ball 2 through a hollow cylinder 5. Sealing rings 4 are disposed at opposite ends of the ball 2 inside the valve body 1. A support ring 6 is sleeved on the outer wall of the sealing ring 4 and slidably connected to the inner wall of the valve body 1. The tail end of the valve stem 3 is hollow, and a driving rod 7 passes through the tail end of the valve stem 3. A conical block 8 is disposed inside the hollow cylinder 5, and the lower end of the driving rod 7 is rotatably connected to the upper side of the conical block 8. The outer walls of the cone-shaped block 8 are slidably connected to the left and right ends of a sliding rod 9. An L-shaped extension rod 10 is provided outside the hollow cylinder 5. An arc-shaped block 11 is provided at one end of the extension rod 10 facing the hollow cylinder 5. One end of the sliding rod 9 passes through the hollow cylinder 5 and is slidably connected to the inner wall of the arc-shaped block 11. A groove 12 is provided on the upper side of the extension rod 10 along its length. A slider 13 is provided on the inner wall of the valve body 1 and is slidably connected to the groove 12. The sliding position of the extension rod 10 is restricted by the sliding cooperation between the slider 13 and the groove 12 to prevent deviation. The end of the extension rod 10 away from the hollow cylinder 5 is connected to the outer wall of the support ring 6.

[0023] A fixing plate 14 is fixed on the outer wall of one end of the sliding rod 9 inside the hollow cylinder 5. A telescopic cover 15 is fitted on the outer wall of the sliding rod 9. One end of the telescopic cover 15 is connected to the inner wall of the hollow cylinder 5, and the other end is connected to the fixing plate 14. The purpose is to allow the sliding rod 9 to be reset after being driven, and to prevent water from flowing into the hollow cylinder 5 through the sliding rod 9. A telescopic cover 2 16 is fitted on the outer wall of the support ring 6. One end of the telescopic cover 2 16 is connected to the inner wall of the valve body 1, and the other end is connected to the outer wall of the support ring 6. The telescopic cover 2 16 plays a certain reset role.

[0024] The valve stem 3 extends out of the end of the driving rod 7 away from the conical block 8 and is screwed into the valve stem 3. A knob 17 is provided on the end of the driving rod 7 that extends out of the valve stem 3, so that it can be easily rotated by personnel.

[0025] When the ball valve is in the position of cutting off the water flow, the left and right surfaces of the ball 2 inside the valve body 1 are in contact with the sealing ring 4 inside the valve body 1.

[0026] When it is necessary to rotate the ball 2, first rotate the lever 7 by rotating the knob 17. The lever 7 is screwed to the valve stem 3, so the lever 7 will rotate upward and pull the cone block 8 upward at the same time. During the upward movement, it pushes the sliding rods 9 at its left and right ends away from each other, and the telescopic cover 15 begins to be compressed. At the same time, the arc block 11 is driven to push the extension rod 10 to move horizontally away from the hollow cylinder 5. The support ring 6 connected to the extension rod 10 is simultaneously driven away from the ball 2, and the sealing ring 4 on the support ring 6 is simultaneously driven away from the ball 2 and no longer adheres to the surface of the ball 2. After completion, start rotating the valve stem 3 to change the position of the ball 2 inside the valve body 1. At this time, since the two sets of sealing rings 4 are driven away from the ball 2 by the support ring 6, there will be no friction between them and the ball 2, reducing the loss caused by friction.

[0027] It should be noted that the valve stem 3 will drive the hollow cylinder 5 to rotate synchronously, and the sliding rod 9 will also be driven synchronously. The conical block 8 is a cone with the top removed. The sliding rod 9 and the outer wall of the conical block 8 are connected in a separable sliding manner. Therefore, the sliding rod 9 being driven does not affect its horizontal movement. The arc block 11 is set in a semi-circle. After the valve stem 3 rotates, the sliding rod 9 is indirectly driven to rotate, and one end of it slides on the arc block 11.

[0028] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A ball valve, comprising a valve body (1) and a ball (2) disposed therein, wherein a valve stem (3) is disposed on the valve body (1), one end of the valve stem (3) passing through the valve body (1) and connected to the outer wall of the ball (2), and sealing rings (4) are disposed inside the valve body (1) at opposite ends of the ball (2). characterized in that The valve stem (3) is hollow, and a hollow cylinder (5) is provided at one end inside the valve body (1) and connected to the outer wall of the ball (2); The outer wall of the sealing ring (4) is fitted with a support ring (6) which is slidably connected to the inside of the valve body (1); A drive rod (7) is provided on the valve stem (3), and a conical block (8) is provided inside the hollow cylinder (5) and connected to the drive rod (7). A sliding drive member is provided on the outer wall of the conical block (8), and one end of the drive member passes through the hollow cylinder (5) and is connected to the support ring (6). The cone block (8) is driven to move the drive component horizontally back and forth along the length of the valve body (1).

2. A ball valve according to claim 1, wherein The driving component includes a sliding rod (9) that is slidably connected to the outer wall of the conical block (8) and an extension rod (10) located outside the hollow cylinder (5). An arc-shaped block (11) is provided at one end of the extension rod (10) facing the hollow cylinder (5). One end of the sliding rod (9) passes through the hollow cylinder (5) and is slidably connected to the inner wall of the arc-shaped block (11). A sliding groove (12) is provided on the extension rod (10). A slider (13) that is slidably connected to the sliding groove (12) is provided on the inner wall of the valve body (1).

3. A ball valve according to claim 2, wherein The sliding rod (9) is located inside the hollow cylinder (5) and a fixed plate (14) is provided on the outer wall of one end. A telescopic cover (15) is sleeved on the outer wall of the sliding rod (9). One end of the telescopic cover (15) is connected to the inner wall of the hollow cylinder (5), and the other end is connected to the fixed plate (14).

4. A ball valve according to claim 1, wherein A telescopic cover (16) is fitted on the outer wall of the support ring (6). One end of the telescopic cover (16) is connected to the inner wall of the valve body (1), and the other end is connected to the outer wall of the support ring (6).

5. A ball valve according to claim 1, wherein One end of the drive rod (7) is rotatably connected to the conical block (8), and the end of the drive rod (7) away from the conical block (8) is screwed to the valve stem (3).

6. A ball valve according to claim 1, wherein The actuator (7) has a knob (17) located at one end outside the valve stem (3).

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