Slot wheel link ball valve

Abstract

The application relates to a slot wheel connecting rod ball valve which comprises a supporting seat, two lower pin shafts arranged on the supporting seat, a hemispherical body connected with each lower pin shaft, the hemispherical body being rotatable around the axis of the lower pin shaft, an installation block integrally connected above the hemispherical body, an upper pin shaft penetrating through the installation block, connecting rods rotatably connected with the upper pin shaft, a central pin shaft penetrating through the two connecting rods, a valve rod movably sleeved with the central pin shaft, and a driving element arranged on the upper side of the valve rod and used for driving the valve rod to move up and down. The application has the advantages of small opening and closing force and low abrasion.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and specifically to a grooved wheel connecting rod ball valve. Background Technology

[0002] The grooved wheel rod ball valve is suitable for media such as crude oil, natural gas, various gases, and clear liquids. It combines the advantages of various valves, including swing ball valves, gate valves, and ball valves. Currently, the opening and closing force of the rod ball valve is relatively large, and the wear is also relatively high, so it needs to be improved. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a grooved wheel connecting rod ball valve, which has the advantages of low opening and closing force and low wear.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grooved wheel connecting rod ball valve, comprising a support base, on which two lower pins are provided, each lower pin being connected to a hemisphere, the hemisphere being rotatable around the axis of the lower pin, an mounting block being integrally connected above the hemisphere, an upper pin being passed through the mounting block, a connecting rod being rotatably connected to the upper pin, the two connecting rods being connected to a central pin, a valve stem being sleeved on the central pin and movable up and down, and a driving component for driving the valve stem to move up and down being provided on the upper side of the valve stem.

[0005] By adopting the above technical solution, the driving component drives the valve stem to move downward. After the valve stem moves downward, it presses the central pin. After the central pin moves downward, it drives the two connecting rods to move away from each other. The movement of the connecting rods will drive the two upper pins to move away from each other, which in turn will drive the mounting blocks to move away from each other. The movement of the two mounting blocks will cause the two hemispheres to move away from each other, so that the hemispheres move towards the valve seat, making the valve seat sealing surface fit with the hemispheres, and the valve closes.

[0006] The present invention is further configured such that: the driving component includes a handwheel, a first connecting rod is connected to the middle of the handwheel, a driving gear is sleeved on the first connecting rod, an upper protrusion and a lower protrusion are integrally connected to the upper and lower sides of the driving gear, an upper grooved wheel that cooperates with the upper protrusion is provided above the driving gear, a lower grooved wheel that cooperates with the lower protrusion is provided below the driving gear, an annular plate is integrally connected below the lower grooved wheel, a cam groove that is inclined vertically is provided in the annular plate, a movable block is provided in the cam groove, and the movable block is fixedly connected to the valve stem.

[0007] By adopting the above technical solution, rotating the handwheel clockwise causes the first connecting rod to rotate, which in turn drives the drive gear to rotate around its own axis. After the drive gear rotates, it drives the upper and lower protrusions to rotate. When the lower protrusion rotates to engage with the lower grooved wheel, the lower grooved wheel is in a transmission state, which in turn drives the annular plate to rotate around the axis of the lower grooved wheel. Since the movable block is in the cam groove and does not rotate with the lower grooved wheel, the movable block will move downward along the length of the lower grooved wheel after the annular plate rotates, thereby driving the valve stem to move downward.

[0008] The present invention is further configured such that rollers are provided on the side of the movable block.

[0009] By adopting the above technical solution, the roller configuration reduces the friction between the moving block and the groove wall of the cam groove.

[0010] In summary, the present invention has the following beneficial effects:

[0011] 1. The present invention is equipped with a dual-function actuator with a grooved wheel and an upper and lower grooved wheel structure, which can output torque and axial force in segments to meet the opening and closing requirements of the connecting rod ball valve;

[0012] 2. The connecting rod ball valve consists of two movable hemispheres. The valve stem is connected to the upper ends of the two hemispheres by two connecting rods. The lower ends of the two hemispheres are positioned on the support seat by a lower pin. The valve body is inlaid with double fixed valve seats. The valve is opened and closed by axial movement and rotation of the valve stem.

[0013] 3. The opening and closing stroke of the connecting rod ball valve of the present invention is short, only one-twelfth of the valve diameter, and the opening and closing force of the connecting rod ball valve is small, only one-third of the normal opening and closing force through the angular component force;

[0014] 4. Low wear during opening and closing: When opening the valve, the ball sealing surface separates from the valve seat sealing surface before rotating, turning 90 degrees to fully open the valve. When closing the valve, the ball is rotated 90 degrees first, and only after reaching the final position does the ball sealing surface close with the valve seat sealing surface.

[0015] 5. Low torque operation: Because there is no friction between the ball and the valve seat when opening and closing, the valve stem can rotate or move axially very easily, so an actuator with a smaller torque can be selected, which reduces configuration costs and saves energy.

[0016] 6. Dual seat design: The dual seat and dual sealing surface are suitable for bidirectional fluid media, ensuring bidirectional sealing and preventing leakage, thus expanding the product's application range.

[0017] 7. Self-cleaning: When the spherical sealing surface deviates, the flowing medium will flow along the sealing surface, washing away the impurities on the sealing surface.

[0018] 8. The lower pins of the two hemispheres are positioned and rotated on the support base, making positioning more accurate, symmetry better, valve opening and closing rotation easier, and extending the service life of parts.

[0019] 9. Long service life: The low friction of the sealing surface during valve opening and closing reduces wear on the sealing surface and extends its service life.

[0020] 10. Reduced actuator configuration costs: Due to the low friction during valve opening and closing, the valve's opening and closing torque is reduced, which in turn reduces the output torque of various actuators; this saves energy and reduces actuator configuration costs. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of an embodiment;

[0022] Figure 2 This is an exploded view diagram of an embodiment;

[0023] Figure 3 for Figure 2 An illustration of the explosion from another perspective;

[0024] Figure 4 This is a schematic diagram of the connection relationship between the lower groove wheel and the cam groove in the embodiment.

[0025] Reference numerals: 1. Handwheel; 2. Upper grooved wheel; 3. Lower grooved wheel; 4. Cam groove; 5. Spindle; 6. Roller; 7. Movable block; 8. Valve stem; 9. Connecting rod; 10. Center pin; 11. Upper pin; 12. Hemisphere; 13. Valve seat; 14. Support seat; 15. Lower pin; 16. First connecting rod; 17. Drive gear; 18. Upper protrusion; 19. Lower protrusion; 20. Mounting block. Detailed Implementation

[0026] The invention will be further described with reference to the accompanying drawings.

[0027] A type of Geneva rod ball valve, such as Figures 1-4 As shown, the device includes a support base 14, on which two lower pins 15 are provided. Each lower pin 15 is connected to a hemisphere 12, which can rotate around the axis of the lower pin 15. An mounting block 20 is integrally connected to the upper part of the hemisphere 12. An upper pin 11 passes through the mounting block 20. The upper pin 11 is rotatably connected to a connecting rod 9. The two connecting rods 9 pass through a central pin 10. A valve stem 8 that can move up and down is sleeved on the central pin 10. A driving component for driving the valve stem 8 to move up and down is provided on the upper side of the valve stem 8.

[0028] The driving component includes a handwheel 1, with a first connecting rod 16 connected to the middle of the handwheel 1. A driving gear 17 is sleeved on the first connecting rod 16. An upper protrusion 18 and a lower protrusion 19 are integrally connected to the upper and lower sides of the driving gear 17. An upper grooved wheel 2 that mates with the upper protrusion 18 is provided above the driving gear 17. A lower grooved wheel 3 that mates with the lower protrusion 19 is provided below the driving gear 17. An annular plate is integrally connected below the lower grooved wheel 3. A cam groove 4 that is inclined vertically is provided in the annular plate. A movable block 7 is provided in the cam groove 4. The movable block 7 is fixedly connected to the valve stem 8.

[0029] The movable block 7 is provided with rollers 6 on its side.

[0030] The movable block 7 and the valve stem 8 are fixedly connected by a spindle 5.

[0031] Work process:

[0032] When the valve is fully open: the handwheel 1 is rotated clockwise, the upper grooved wheel 2 enters the transmission state, and the ball is rotated 90° by the valve stem 8. The handwheel 1 continues to rotate clockwise, the upper grooved wheel 2 leaves the transmission state, and the lower grooved wheel 3 enters the transmission state. The rotation of the lower grooved wheel 3 will drive the rotation of the cam groove 4. The axial cam groove 4 rotates with the lower grooved wheel 3 at a certain angle. The roller 6 in the cam groove 4 drives the axial movable block 7 to push the valve stem 8 downward. The lower end of the valve stem 8 is connected to the connecting rod 9 through the central pin 10, which pushes the hemisphere 12 towards the valve seat 13, so that the sealing surface of the valve seat 13 is combined with the hemisphere, and the valve is fully closed.

[0033] When the valve is fully closed: the handwheel 1 is rotated counterclockwise, the lower grooved wheel 3 enters the transmission state, the cam groove 4 rotates with the lower grooved wheel 3 at a certain angle, the roller 6 in the cam groove 4 drives the axial movable block 7 to push the valve stem 8 upward, the lower end of the valve stem 8 is connected to the connecting rod 9 through the central pin 10, which pulls the hemisphere towards the middle, so that the hemisphere leaves the sealing surface of the valve stem 13. The handwheel 1 continues to rotate counterclockwise, the lower grooved wheel 3 leaves the transmission state, the upper grooved wheel 2 enters the transmission state, and the valve stem 8 rotates the ball counterclockwise by 90°, and the valve is fully open.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A Geneva rod ball valve, comprising a support base (14), characterized in that: The support base (14) is provided with two lower pins (15), each of which is connected to a hemisphere (12). The hemisphere (12) can rotate around the axis of the lower pin (15). An mounting block (20) is integrally connected to the top of the hemisphere. An upper pin (11) is passed through the mounting block (20). The upper pin (11) is rotatably connected to a connecting rod (9). The two connecting rods (9) are connected to a central pin (10). The central pin (10) is sleeved with a valve stem (8) that can move up and down. A driving component for driving the valve stem (8) to move up and down is provided on the upper side of the valve stem (8). The driving component includes a handwheel (1). A first connecting rod (16) is connected to the middle of the handwheel (1). 16) A drive gear (17) is sleeved on. The upper and lower sides of the drive gear (17) are integrally connected with an upper protrusion (18) and a lower protrusion (19). An upper grooved wheel (2) that cooperates with the upper protrusion (18) is provided above the drive gear (17). A lower grooved wheel (3) that cooperates with the lower protrusion (19) is provided below the drive gear (17). An annular plate is integrally connected below the lower grooved wheel (3). A cam groove (4) that is inclined vertically is provided in the annular plate. A movable block (7) is provided in the cam groove (4). The movable block (7) is fixedly connected to the valve stem (8). A roller (6) is provided on the side of the movable block (7). The movable block (7) and the valve stem (8) are fixedly connected by a spindle (5).

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