Forced sealing wear-resistant ball valve

Abstract

The utility model discloses a forced sealing wear-resisting ball valve which comprises a ball valve shell, a valve body is rotatably connected to an inner cavity of the ball valve shell, a hollow valve pipe is fixedly connected to the top of the valve body, a penetrating hole matched with the hollow valve pipe is formed in the top of the ball valve shell, and the top end of the hollow valve pipe penetrates through an inner cavity of the penetrating hole. When the device is used, the rotary knob is rotated to drive the transmission shaft to rotate, the threaded rod can be driven to rotate through meshing of the transmission bevel gear and the driven bevel gear, the threaded rod rotates to drive the threaded sleeve to move downwards, and the lifting plate is jointly driven to vertically move downwards under the arrangement of the two vertical rods; the lifting plate moves downwards to drive the ball to move downwards and extrude the extrusion blocks on the two sides to move oppositely, and therefore the two rubber sealing plates can be driven by the two cross rods to move into inner cavities of the adjacent stainless steel sealing rings correspondingly, forced sealing of the ball valve can be achieved, and the sealing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a forced-sealing wear-resistant ball valve. Background Technology

[0002] Currently, ball valves mainly have two types of sealing structures: metal seals and non-metal seals. They primarily rely on spring force, medium force, or the preload provided by bolts during assembly to ensure that the sealing ring is tightly fitted onto the ball, thereby achieving the sealing purpose. However, regardless of the method, the sealing pressure is locked when the valve is assembled and cannot be adjusted online. This means that when the valve has defects such as insufficient sealing pressure or scratches on the sealing surface that prevent it from sealing, the valve must be repaired, and it is impossible to achieve the effect of forcibly sealing the valve in case of emergencies. Utility Model Content

[0003] One of the objectives of this utility model is achieved through the following technical solution:

[0004] A forced-sealing wear-resistant ball valve includes a ball valve housing. A valve body is rotatably connected to the inner cavity of the ball valve housing, and a hollow valve tube is fixedly connected to the top of the valve body. A through-hole adapted to the hollow valve tube is opened on the top of the ball valve housing, and the top end of the hollow valve tube penetrates the inner cavity of the through-hole and is fixedly connected to a connecting shell. A valve handle is fixedly connected to the top of the connecting shell. A cavity communicating with the inner cavity of the hollow valve tube is opened on the valve body. Rubber sealing plates are provided on both the left and right sides of the valve body, and stainless steel sealing rings adapted to the rubber sealing plates are provided on both the left and right sides of the inner cavity of the ball valve housing. A common pushing mechanism is provided between the two rubber sealing plates. The pushing mechanism includes two crossbars, and the two crossbars are respectively fixedly connected to the center of an adjacent side of the two rubber sealing plates. Through-holes adapted to the crossbars and communicating with the inner cavity are opened on both the left and right sides of the valve body. The adjacent ends of the two crossbars penetrate the adjacent through-holes and extend into the inner cavity of the hollow cavity. The device is fixedly connected to two extrusion blocks. Two vertically distributed extrusion springs are provided on the opposite sides of each extrusion block, with the other end of each spring fixedly connected to the inner wall of the cavity. A sphere is positioned between the two extrusion blocks, and a lifting plate is fixedly connected to the top of the sphere. Two horizontally distributed vertical rods are fixedly connected to the top of the lifting plate, with the top ends of both rods extending into the inner cavity of the hollow valve tube and fixedly connected to the same threaded sleeve. A matching threaded rod is threaded into the inner cavity of the threaded sleeve, and the top end of the threaded rod is rotatably connected to the top of the inner cavity of the connecting shell. A driven bevel gear is sleeved and fixedly attached to the outer wall of the threaded rod near its top end, and a transmission bevel gear meshes with the right side of the driven bevel gear. A sealed bearing is provided on the right side of the connecting shell, and a transmission shaft is rotatably connected to the inner cavity of the sealed bearing. One end of the transmission shaft is fixedly connected to the center of the right side of the transmission bevel gear, and the other end of the transmission shaft is fixedly connected to a knob.

[0005] Furthermore, the frontal cross-section of the extrusion block is a right-angled trapezoid, and the bottom of the extrusion block is fitted to the bottom of the inner cavity of the cavity.

[0006] Furthermore, a cam is fixedly fitted onto the outer wall of the drive shaft, and a fixing hole is provided at the top of the cam. A through hole is provided at the bottom of the connecting shell near the right side, and a T-shaped rod that matches the fixing hole slides through the inner cavity of the through hole. A return spring is fitted onto the outer wall of the T-shaped rod, and the two ends of the return spring are fixedly connected to the connecting shell and the T-shaped rod, respectively.

[0007] Furthermore, the outer wall of the knob is provided with anti-slip texture.

[0008] Furthermore, the cavity and the lifting plate have the same top-view cross-sectional size, and both the cavity and the lifting plate have a rectangular top-view cross-sectional shape.

[0009] Furthermore, an anti-slip sleeve is fitted and fixed on the left side of the outer wall of the valve handle.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. By turning the knob and driving the drive shaft to rotate, the meshing of the drive bevel gear and the driven bevel gear drives the threaded rod to rotate. The rotation of the threaded rod drives the threaded sleeve to move downward. With the two vertical rods in place, they jointly drive the lifting plate to move vertically downward. The downward movement of the lifting plate drives the ball to move downward and squeeze the extrusion blocks on both sides to move in opposite directions. Thus, the two horizontal rods drive the two rubber sealing plates to move into the inner cavity of the adjacent stainless steel sealing rings, thereby achieving forced sealing of the ball valve and improving the sealing effect.

[0012] 2. The rotation of the drive shaft drives the cam to rotate. When the cam rotates 180 degrees, the longest end of the T-shaped rod can be inserted into the fixing hole. With the setting of the return spring, the T-shaped rod can be tightened under the connecting shell. By locking the cam, the knob is prevented from rotating under external force, thus improving the stability of the forced seal. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main view structure of this embodiment;

[0014] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0015] Figure 3 for Figure 1 Enlarged view of the structure at point B.

[0016] In the diagram: 1. Ball valve housing; 2. Valve body; 3. Rubber sealing plate; 4. Stainless steel sealing ring; 5. Hollow valve pipe; 6. Connecting shell; 7. Valve handle; 8. Anti-slip sleeve; 9. Cavity; 10. Extrusion block; 11. Crossbar; 12. Extrusion spring; 13. Ball; 14. Lifting plate; 15. Threaded rod; 16. Threaded sleeve; 17. Vertical rod; 18. Driven bevel gear; 19. Transmission bevel gear; 20. Transmission shaft; 21. Knob; 22. Cam; 23. Fixing hole; 24. T-shaped rod; 25. Return spring. Detailed Implementation

[0017] Please see Figures 1 to 3 The present invention provides the following technical solution:

[0018] A forced-seal wear-resistant ball valve includes a ball valve housing 1, a valve body 2 rotatably connected to the inner cavity of the ball valve housing 1, and a hollow valve tube 5 fixedly connected to the top of the valve body 2. The top of the ball valve housing 1 has a through hole adapted to the hollow valve tube 5, and the top end of the hollow valve tube 5 penetrates the inner cavity of the through hole and is fixedly connected to a connecting shell 6. A valve handle 7 is fixedly connected to the top of the connecting shell 6. An anti-slip sleeve 8 is fitted and fixedly attached to the left side of the outer wall of the valve handle 7. The valve body 2 has a cavity 9 communicating with the inner cavity of the hollow valve tube 5. Rubber sealing plates 3 are provided on both the left and right sides of the valve body 2, and stainless steel sealing rings 4 adapted to the rubber sealing plates 3 are provided on both the left and right sides of the inner cavity of the ball valve housing 1. The rubber sealing plates 3 can be slid into the stainless steel sealing rings 4, thereby achieving not only soft and hard dual sealing, but also forced sealing of the ball valve, improving the sealing effect. A common pushing mechanism is provided between the two rubber sealing plates 3.

[0019] The pushing mechanism includes two crossbars 11, which are fixedly connected to the center of adjacent sides of two rubber sealing plates 3. The valve body 2 has through holes on both its left and right sides that are adapted to the crossbars 11 and communicate with the inner cavity of the cavity 9. The adjacent ends of the two crossbars 11 pass through adjacent through holes, extending into the inner cavity of the cavity 9, and are each fixedly connected to a pressing block 10. The frontal cross-section of the pressing block 10 is a right-angled trapezoid, and the bottom of the pressing block 10 is fitted against the bottom of the inner cavity of the cavity 9 to improve the stability of the pressing block 10 during horizontal movement. The two pressing blocks 10 are spaced far apart. Two vertically distributed compression springs 12 are provided on one side of each cavity 9, and the other end of each compression spring 12 is fixedly connected to the inner wall of the cavity 9. A sphere 13 is provided between the two compression blocks 10, and a lifting plate 14 is fixedly connected to the top of the sphere 13. The cavity 9 and the lifting plate 14 have the same cross-sectional size when viewed from above, and both the cavity 9 and the lifting plate 14 are rectangular in shape when viewed from above, so that the lifting plate 14 can only move vertically. Two horizontally distributed vertical rods 17 are fixedly connected to the top of the lifting plate 14, and the top ends of both vertical rods 17 extend into the inner cavity of the hollow valve tube 5 and are fixedly connected. There is a threaded sleeve 16, and a threaded rod 15 is threadedly connected to the inner cavity of the threaded sleeve 16. The top end of the threaded rod 15 is rotatably connected to the top of the inner cavity of the connecting shell 6. A driven bevel gear 18 is sleeved and fixed near the top end of the outer wall of the threaded rod 15. A transmission bevel gear 19 meshes with the right side of the driven bevel gear 18. A sealed bearing is provided on the right side of the connecting shell 6. A transmission shaft 20 is rotatably connected to the inner cavity of the sealed bearing. One end of the transmission shaft 20 is fixedly connected to the right center of the transmission bevel gear 19, and a knob is fixedly connected to the other end of the transmission shaft 20. 21. The outer wall of the knob 21 is provided with anti-slip texture. Turning the knob 21 drives the transmission shaft 20 to rotate, and the meshing of the transmission bevel gear 19 and the driven bevel gear 18 drives the threaded rod 15 to rotate. The rotation of the threaded rod 15 drives the threaded sleeve 16 to slide downward, and drives the lifting plate 14 to move vertically downward through the vertical rod 17. The downward movement of the lifting plate 14 drives the ball 13 to move downward, and squeezes the pressing blocks 10 on both sides to move in opposite directions. The movement of the pressing blocks 10 drives the rubber sealing plate 3 to slide into the inner cavity of the stainless steel sealing ring 4 through the horizontal rod 11, thereby achieving forced sealing.

[0020] A cam 22 is fixedly fitted onto the outer wall of the drive shaft 20, and a fixing hole 23 is provided at the top of the cam 22. A through hole is provided at the bottom of the connecting shell 6 near the right side, and a T-shaped rod 24 that is adapted to the fixing hole 23 slides through the inner cavity of the through hole. A return spring 25 is fitted onto the outer wall of the T-shaped rod 24, and the two ends of the return spring 25 are fixedly connected to the connecting shell 6 and the T-shaped rod 24 respectively. When the drive shaft 20 rotates, it will drive the cam 22 to rotate 180 degrees and align the fixing hole 23 with the T-shaped rod 24. Thus, when the T-shaped rod 24 is released, the longest end of the T-shaped rod 24 can be inserted into the inner cavity of the fixing hole 23 and the cam 22 will be locked, thereby preventing the knob 21 from being accidentally touched and rotating.

[0021] Working principle: In use, the T-shaped rod 24 is first pulled to overcome the resistance of the return spring 25 and move vertically downward. Then, the knob 21 is turned to drive the transmission shaft 20 to rotate. Through the meshing of the transmission bevel gear 19 and the driven bevel gear 18, the threaded rod 15 is driven to rotate. The rotation of the threaded rod 15 causes the threaded sleeve 16 to slide downward. Together with the two vertical rods 17, the lifting plate 14 is driven to move vertically downward. The downward movement of the lifting plate 14 causes the ball 13 to move downward. Water is applied to the side of the ball 13 adjacent to the two extrusion blocks 10. The horizontal pushing force pushes the two compression blocks 10 to move in opposite directions against the resistance of the compression spring 12, and through the two crossbars 11, drives the two rubber sealing plates 3 to slide into the inner cavity of the adjacent stainless steel sealing rings 4, thereby achieving forced sealing of the ball valve. After sealing is completed, the T-shaped rod 24 is released, and under the action of the return spring 25, the T-shaped rod 24 moves vertically upward and is inserted into the inner cavity of the fixing hole 23, thereby locking the cam 22 and preventing accidental activation of the knob 21, which could lead to poor sealing.

Claims

1. A forced-seal wear-resistant ball valve, comprising a ball valve housing (1), characterized in that: The inner cavity of the ball valve housing (1) is rotatably connected to the valve body (2), and the top of the valve body (2) is fixedly connected to the hollow valve tube (5). The top of the ball valve housing (1) is provided with a through hole adapted to the hollow valve tube (5), and the top end of the hollow valve tube (5) penetrates the inner cavity of the through hole and is fixedly connected to the connecting shell (6). The top of the connecting shell (6) is fixedly connected to the valve handle (7). The valve body (2) is provided with a cavity (9) communicating with the inner cavity of the hollow valve tube (5). Rubber sealing plates (3) are provided on both the left and right sides of the valve body (2), and the inner cavity of the ball valve housing (1) is provided with rubber sealing plates (3). Each is equipped with a stainless steel sealing ring (4) that is compatible with the rubber sealing plate (3). A push mechanism is provided between the two rubber sealing plates (3). The push mechanism includes two crossbars (11), and the two crossbars (11) are respectively fixedly connected to the center of the adjacent side of the two rubber sealing plates (3). The valve body (2) has through holes on both the left and right sides that are compatible with the crossbars (11) and connected to the inner cavity of the cavity (9). The adjacent ends of the two crossbars (11) pass through the adjacent through holes and extend into the inner cavity of the cavity (9). Each of them is fixedly connected with a squeezing block (10). The two squeezing blocks (10) 10) Two compression springs (12) are provided on each side that are far apart from each other, and the other end of the compression springs (12) is fixedly connected to the inner wall of the cavity (9). A ball (13) is provided between the two compression blocks (10), and a lifting plate (14) is fixedly connected to the top of the ball (13). Two vertical rods (17) are fixedly connected to the top of the lifting plate (14), and the top ends of the two vertical rods (17) extend into the inner cavity of the hollow valve tube (5) and are fixedly connected to the same threaded sleeve (16). The inner cavity of the threaded sleeve (16) is threaded with a matching thread. A threaded rod (15) is provided, and the top end of the threaded rod (15) is rotatably connected to the top of the inner cavity of the connecting shell (6). A driven bevel gear (18) is sleeved and fixed near the top end of the outer wall of the threaded rod (15), and a transmission bevel gear (19) meshes with the right side of the driven bevel gear (18). A sealed bearing is provided on the right side of the connecting shell (6), and a transmission shaft (20) is rotatably connected to the inner cavity of the sealed bearing. One end of the transmission shaft (20) is fixedly connected to the right center of the transmission bevel gear (19), and a knob (21) is fixedly connected to the other end of the transmission shaft (20).

2. The forced-sealing wear-resistant ball valve as described in claim 1, characterized in that: The frontal cross-section of the extrusion block (10) is a right-angled trapezoid, and the bottom of the extrusion block (10) is fitted to the bottom of the inner cavity of the cavity (9).

3. The forced-sealing wear-resistant ball valve as described in claim 1, characterized in that: A cam (22) is fixedly fitted onto the outer wall of the drive shaft (20), and a fixing hole (23) is provided at the top of the cam (22). A through hole is provided at the bottom of the connecting shell (6) near the right side, and a T-shaped rod (24) that matches the fixing hole (23) slides through the inner cavity of the through hole. A return spring (25) is fitted onto the outer wall of the T-shaped rod (24), and the two ends of the return spring (25) are fixedly connected to the connecting shell (6) and the T-shaped rod (24) respectively.

4. The forced-sealing wear-resistant ball valve as described in claim 1, characterized in that: The outer wall of the knob (21) is provided with anti-slip texture.

5. The forced-sealing wear-resistant ball valve as described in claim 1, characterized in that: The cavity (9) and the lifting plate (14) have the same top view cross-sectional size, and both the cavity (9) and the lifting plate (14) have rectangular top view cross-sections.

6. The forced-sealing wear-resistant ball valve as described in claim 1, characterized in that: An anti-slip sleeve (8) is fitted and fixed on the left side of the outer wall of the valve handle (7).

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