A valve with precise shutoff control function

Abstract

The present invention discloses a valve with a precise flow cut-off control function, comprising a valve body, a valve cover detachably connected to the top of the valve body via a screw thread, a first positioning rod uniformly welded to the top of the valve cover, an outer wall of the first positioning rod located above the valve cover and sleeved with a pressure plate, and an outer wall of the first positioning rod located between the valve cover and the pressure plate and sleeved with a spring. In the present invention, precise control of the flow of material can be achieved by rotating a first control handwheel and a second control handwheel. When the flow of material is cut off, the pressure plate can be brought into close contact with the partition through a sealing gasket by twisting the first control handwheel and the second control handwheel. The spring can enhance the sealing effect, effectively prevent backflow, and avoid the occurrence of backflow. The entire device can be disassembled and maintained by disassembling the first threaded sleeve and the second threaded sleeve, making it easy to replace parts inside the valve body, reducing costs, and ensuring the stability of the device.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and in particular relates to a valve with a precise flow cut-off control function. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of conveyed media. They are widely used in water and gas pipes. Through the control of valves, the flow of substances can be controlled. Shutoff control valves are an important type of valve, commonly used in municipal and other convenient applications.

[0003] The existing shut-off control valve adopts a single valve stem for control when in use. The valve stem moves a large distance when it is rotated, which cannot meet the requirements for precise regulation of the flow rate of the material. When the existing shut-off control valve is not in use, the material will pass through the sealing cover connection in the inner cavity, causing backflow, and the sealing is poor. At the same time, the existing shut-off control valve adopts integral casting, and the damaged parts inside are not easy to replace, which increases the cost of use and cannot meet the company's requirements for valves with precise shut-off control functions. Summary of the Invention

[0004] The purpose of the present invention is to provide a valve with precise flow cut-off control function in order to solve the problems of low flow control accuracy, easy backflow, and inconvenient maintenance.

[0005] The technical solution adopted by the present invention is as follows: a valve with a precise shut-off control function, comprising a valve body, the top of the valve body is detachably connected to a valve cover by a screw thread, the top of the valve cover is uniformly welded with a first positioning rod, the outer wall of the first positioning rod is located above the valve cover and is sleeved with a pressure plate, the outer wall of the first positioning rod is located between the valve cover and the pressure plate and is sleeved with a spring, one end of the first positioning rod is located at the top of the pressure plate and is threadedly connected to a first threaded sleeve, so that the distance between the pressure plate and the valve cover can be adjusted by the expansion and contraction of the spring, and the valve body cavity is located in the vertical center A partition is welded on the line, and a flow limiting tube is slidably embedded in the top center of the partition, and a sealing block is welded on the top of the flow limiting tube. A sealing gasket is sleeved on the outer wall of the flow limiting tube, and the top of the sealing gasket is bonded to the sealing block. A round block is rotatably embedded in the sealing block on the vertical center line, and a valve pipe is penetrated at the top center of the sealing block. The valve pipe penetrates the center of the round block and is welded so that the valve pipe drives the round block to rotate in the sealing block, and the other end of the valve pipe penetrates the valve cover and the pressure plate in sequence and is welded with a first control handwheel, and the valve pipe is threadedly connected to the pressure plate.

[0006] The outer wall of the valve tube is covered with a gasket, which is embedded in the valve cover. The vertical cross-section of the gasket is an inverted convex structure, and the top of the valve cover is evenly welded with a second positioning rod around the gasket.

[0007] Wherein, a pressure cap is sleeved on the outer wall of the second positioning rod, and the other end of the second positioning rod is located at the top of the pressure cap and is threadedly connected to a second threaded sleeve so that the pressure cap can fix the gasket.

[0008] Among them, the valve stem is connected to the inner thread of the valve tube, one end of the valve stem passes through the first control handwheel and is welded with the second control handwheel, a flow limiting block is slidingly arranged in the flow limiting tube, and a rotating block is embedded in the flow limiting block on the vertical center line for rotation, and the rotating block is welded to the valve stem.

[0009] Wherein, two sliding blocks are welded on both sides of the rotating block, and the two sliding blocks are slidably embedded in the flow limiting tube.

[0010] Wherein, a plurality of through holes are evenly provided on the outer wall of the flow limiting tube, and two sliding grooves are provided in the flow limiting tube.

[0011] The top of the pressure plate is located around the first control handwheel and is evenly engraved with scale marks. The tops of the first control handwheel and the second control handwheel are both provided with indicator arrows.

[0012] Wherein, the vertical cross section of the partition is a staircase-shaped structure so that the material can flow in the valve body.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] 1. In the present invention, the first control handwheel can be turned to drive the valve tube to rotate. Since the valve tube is threadedly connected to the pressure plate, the valve tube drives the round block to rotate in the sealing block, and drives the flow limiting tube to move up and down in the partition. The material can flow through the multiple through holes provided on the flow limiting tube. The second control handwheel can be turned to change the position of the flow limiting block in the flow limiting tube and the actual number of through holes in use, thereby achieving the purpose of secondary material flow regulation. The material flow can be accurately controlled by the indicator arrow and scale mark.

[0015] 2. In the present invention, when the flow of materials is cut off, by turning the first control hand wheel and the second control hand wheel, the pressure plate can be closely contacted with the partition through the sealing gasket. The spring can enhance the sealing effect, effectively prevent backflow, and avoid the occurrence of backflow.

[0016] 3. In the present invention, the entire device can be disassembled and maintained by disassembling the first threaded sleeve, the second threaded sleeve and the threaded nail, which facilitates the replacement of parts inside the valve body, reduces costs and ensures the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the top view of the valve cover connection in the present invention;

[0019] Figure 3 It is a schematic diagram of the structure enlarged at point A in the present invention;

[0020] Figure 4 Schematic diagram of the side structure of the flow limiting tube and the sealing block in the present invention;

[0021] Figure 5 Schematic diagram of the connection structure inside the flow limiting tube in the present invention.

[0022] Markings in the figure: 1. Valve body; 2. Partition; 3. Flow limiting tube; 4. Sealing block; 5. Sealing gasket; 6. Valve cover; 7. First positioning rod; 8. Spring; 9. Pressure plate; 10. First threaded sleeve; 11. First control handwheel; 12. Second control handwheel; 13. Valve stem; 14. Valve pipe; 15. Pressure cover; 16. Scale mark; 17. Indicator arrow; 18. Second positioning rod; 19. Second threaded sleeve; 20. Gasket; 21. Round block; 22. Flow limiting block; 23. Rotating block; 24. Slider. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Example 1, refer to Figure 1A valve with precise flow control function includes a valve body 1. The top of the valve body 1 is detachably connected to a valve cover 6 by a screw thread. The top of the valve cover 6 is evenly welded with a first positioning rod 7. The outer wall of the first positioning rod 7 is located above the valve cover 6 and is sleeved with a pressure plate 9. The outer wall of the first positioning rod 7 is located between the valve cover 6 and the pressure plate 9 and is sleeved with a spring 8. When in use, the length of the spring 8 can be adjusted in advance to calibrate the entire device. One end of the first positioning rod 7 is located at the top of the pressure plate 9 and is threadedly connected to a first threaded sleeve 10, so that the distance between the pressure plate 9 and the valve cover 6 can be adjusted by the expansion and contraction of the spring 8. A partition 2 is welded in the inner cavity of the valve body 1 on the vertical center line. A flow limiting tube 3 is slidably embedded in the top center of the partition 2. A sealing block 4 is welded on the top of the flow limiting tube 3. A sealing gasket 5 is sleeved on the outer wall of the flow limiting tube 3, and the top of the sealing gasket 5 is bonded to the sealing block 4. A round block 21 is rotatably embedded in the sealing block 4 on the vertical center line. A valve tube 14 is provided at the top center of the sealing block 4. The valve tube 14 passes through the center of the round block 21. The valve tube 14 is welded together so that the round block 21 can rotate in the sealing block 4, and the other end of the valve tube 14 passes through the valve cover 6 and the pressure plate 9 in sequence and is welded with a first control hand wheel 11, and the valve tube 14 is threadedly connected to the pressure plate 9. When using the device, the first control hand wheel 11 can be rotated to rotate the valve tube 14 in the valve body 1. Since the valve tube 14 is threadedly connected to the pressure plate 9, as the first control hand wheel 11 is rotated, the valve tube 14 can change its position up and down in the valve body 1, and the valve tube 14 can drive The round block 21 rotates in the sealing block 4, pulling the sealing block 4 up and down to separate or squeeze the sealing gasket 5 from the partition 2. When the flow limiting tube 3 moves up with the valve tube 14, the through hole on the flow limiting tube 3 will be above the partition 2, so that the flow of the material inside the valve body 1 can be achieved. Similarly, the valve tube 14 can drive the sealing block 4 to squeeze the partition 2. This time, the spring 8 will also be compressed, so that the sealing block 4 connects the sealing gasket 5 and the partition 2 more tightly, which can effectively prevent the backflow of material.

[0025] Example 2, refer to Figure 1 and 3The outer wall of the valve tube 14 is sleeved with a gasket 20, and the gasket 20 is embedded in the valve cover 6, and the vertical cross-section of the gasket 20 is an inverted convex structure. The gasket 20 can prevent the material in the valve body 1 from overflowing. The top of the valve cover 6 is located around the gasket 20 and is evenly welded with a second positioning rod 18. There are multiple second positioning rods 18, which form a circular figure when viewed from above. A pressure cap 15 is sleeved on the outer wall of the second positioning rod 18. The other end of the second positioning rod 18 is located at the top of the pressure cap 15 and is threadedly connected with a second threaded sleeve 19 so that the pressure cap 15 fixes the gasket 20. When replacing and maintaining the internal components of the device, the first threaded sleeve 10, the second threaded sleeve 19 and the screws can be unscrewed, and the valve cover 6 can be removed from the valve body 1, so that the flow limiting tube 3 and the like can be taken out, so as to realize the replacement and maintenance of the internal and external components of the entire device, which can facilitate the maintenance of the device and ensure the stability of the device.

[0026] Example 3, refer to Figure 1-2 And 4-5, the valve stem 13 is connected to the valve tube 14 through the internal thread, one end of the valve stem 13 passes through the first control handwheel 11 and is welded with the second control handwheel 12, a flow limiting block 22 is slidingly set in the flow limiting tube 3, and a rotating block 23 is embedded in the flow limiting tube 3 for rotation on the vertical center line, and the rotating block 23 is welded to the valve stem 13, and two sliders 24 are welded on both sides of the rotating block 23. The two sliders 24 can prevent the flow limiting block 22 from rotating in the flow limiting tube 3, and the two sliders 24 are slidably embedded in the flow limiting tube 3. A plurality of through holes are evenly provided on the outer wall of the flow limiting tube 3, and two slide grooves are provided in the flow limiting tube 3. The two slide grooves are corresponding to the two sliders 24, and the top of the pressure plate 9 is located on all sides of the first control handwheel 11. There are evenly engraved scale marks 16, and the tops of the first control handwheel 11 and the second control handwheel 12 are both provided with indicator arrows 17. The vertical cross-section of the partition 2 is a staircase-shaped structure so that the material can flow in the valve body 1. After turning the first control handwheel 11, turning the second control handwheel 12 again can make the valve stem 13 rotate in the valve tube 14, driving the rotating block 23 to rotate in the flow limiting block 22. The flow limiting block 22 will change its position in the flow limiting tube 3 and block the through holes at different positions, so as to realize secondary material flow control and adjustment. When in use, the flow of the material can be intuitively understood by referring to the scale mark 16 by rotating the indicator arrow 17, which is convenient for users to use.

[0027] Working principle: When in use, turn the first control handwheel 11, so that the first control handwheel 11 drives the valve tube 14 to rotate. Since the valve tube 14 is threadedly connected to the pressure plate 9, the valve tube 14 drives the round block 21 to rotate in the sealing block 4, and drives the flow limiting tube 3 to move up and down in the partition 2. The material can be circulated through the multiple through holes provided on the flow limiting tube 3. The second control handwheel 12 can be turned to change the position of the flow limiting block 22 in the flow limiting tube 3, and the actual number of through holes used can be changed, so as to achieve the purpose of secondary material flow regulation. The indicator arrow 17 will rotate with the rotation of the first control handwheel 11 and the second control handwheel 12 The material flow can be viewed visually through the indicating arrow 17 and the scale mark 16, so as to achieve precise flow control effect. When the material does not need to flow, the first control hand wheel 11 can be turned to increase the extrusion force on the spring 8. At this time, the sealing block 4 will be more tightly connected to the partition 2 with the sealing gasket 5, which can effectively prevent the backflow of the material. When the device needs to be repaired, the valve cover 6, the pressure plate 9, etc. can be removed by disassembling the first threaded sleeve 10, the second threaded sleeve 19 and the threaded nail, so that the internal or external components of the device can be easily replaced and maintained to avoid overall replacement.

[0028] 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 and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve with precise flow cut-off control function, comprising a valve body (1), characterized in that: The top of the valve body (1) is detachably connected to the valve cover (6) through a screw thread, and a first positioning rod (7) is evenly welded to the top of the valve cover (6). The outer wall of the first positioning rod (7) is located above the valve cover (6) and is sleeved with a pressure plate (9). The outer wall of the first positioning rod (7) is located between the valve cover (6) and the pressure plate (9) and is sleeved with a spring (8). One end of the first positioning rod (7) is located at the top of the pressure plate (9) and is threadedly connected to a first threaded sleeve (10) so that the distance between the pressure plate (9) and the valve cover (6) can be adjusted by the expansion and contraction of the spring (8). The valve body ( 1) A partition (2) is welded on the vertical center line in the inner cavity, a flow limiting tube (3) is slidably embedded in the center of the top of the partition (2), a sealing block (4) is welded on the top of the flow limiting tube (3), a sealing gasket (5) is sleeved on the outer wall of the flow limiting tube (3), and the top of the sealing gasket (5) is bonded to the sealing block (4), a round block (21) is rotatably embedded in the sealing block (4) on the vertical center line, a valve pipe (14) is penetrated at the center of the top of the sealing block (4), and the valve pipe (14) penetrates the center of the round block (21) and is welded so that the valve pipe (14) drives the round block (21) to rotate. ) rotates in the sealing block (4), and the other end of the valve tube (14) passes through the valve cover (6) and the pressure plate (9) in sequence and is welded with a first control handwheel (11), and the valve tube (14) is threadedly connected to the pressure plate (9); the valve tube (14) is threadedly connected to a valve stem (13), one end of the valve stem (13) passes through the first control handwheel (11) and is welded with a second control handwheel (12), a flow limiting block (22) is slidingly arranged in the flow limiting tube (3), a rotating block (23) is rotatably embedded in the flow limiting block (22) and is located on the vertical center line, and the rotating block (23) is connected to the valve stem (13) welding; two sliders (24) are welded on both sides of the rotating block (23), and the two sliders (24) are slidably embedded in the flow limiting tube (3); a plurality of through holes are evenly opened on the outer wall of the flow limiting tube (3), and two slide grooves are opened in the flow limiting tube (3); the top of the pressure plate (9) is located on the four sides of the first control handwheel (11) and is evenly engraved with scale marks (16), and the tops of the first control handwheel (11) and the second control handwheel (12) are both provided with indicator arrows (17); the vertical cross-section of the partition (2) is a staircase-shaped structure so that the material can flow in the valve body (1).

2. A valve with precise flow cutoff control function according to claim 1, characterized in that: The outer wall of the valve tube (14) is provided with a gasket (20), and the gasket (20) is embedded in the valve cover (6), and the vertical cross-section of the gasket (20) is an inverted convex structure, and the top of the valve cover (6) is located around the gasket (20) and is evenly welded with a second positioning rod (18).

3. A valve with precise flow cutoff control function according to claim 2, characterized in that: A pressure cover (15) is sleeved on the outer wall of the second positioning rod (18), and the other end of the second positioning rod (18) is located at the top of the pressure cover (15) and is threadedly connected to a second threaded sleeve (19) so that the pressure cover (15) can fix the gasket (20).

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