Flow-adjustable butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a flow-adjustable butterfly valve which comprises a protective box, a worm is arranged in the protective box, one end of the worm is rotatably connected to the inner wall of the protective box, a rotating wheel is fixedly installed at the end, away from the protective box, of the worm, a scale groove is formed in the protective box, and the rotating wheel is fixedly connected to the inner wall of the protective box. A first valve shaft is rotationally connected into the protection box, a turbine is fixedly connected to the first valve shaft in a sleeving mode, the turbine is meshed with the worm, a scale sliding block is fixedly connected to the first valve shaft, and the scale sliding block is movably arranged in the scale groove. According to the butterfly valve, the scale sliding block and the scale groove are arranged, the worm in the protection box rotates by rotating the rotating wheel, the worm gear and the worm are in meshing transmission, the first valve shaft rotates, the scale sliding block slides in the scale groove at the moment, and accurate adjustment of the flow of the butterfly valve can be achieved by observing the scale sliding block in the scale groove. The problem that a traditional butterfly valve is low in precision in the aspect of flow adjustment is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and particularly relates to a flow adjustable butterfly valve. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve. A butterfly valve used for the on-off control of a medium in a low-pressure pipeline refers to a valve whose closing member, the valve flap or butterfly plate, is a disc that rotates around the valve shaft to achieve opening and closing. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media, and mainly functions as a cut-off and throttling in a pipeline.

[0003] The existing traditional butterfly valves have low accuracy in flow regulation, especially in occasions where precise control of fluid flow is required. Secondly, the existing butterfly valves will cause a decline in the sealing performance of the butterfly valve during long-term use, and may not be able to effectively provide sufficient sealing performance. Under high-pressure or high-temperature conditions, leakage problems are likely to occur.

[0004] Therefore, a flow adjustable butterfly valve is proposed. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a flow adjustable butterfly valve, which can effectively solve the problem of low accuracy of traditional butterfly valves in flow regulation and the problem that the sealing performance of existing butterfly valves will decline during long-term use.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a flow adjustable butterfly valve, including a protective box. A worm is arranged inside the protective box. One end of the worm is rotatably connected to the inner wall of the protective box. A runner is fixedly installed at the end of the worm away from the protective box. A scale groove is opened on the protective box. A first valve shaft is rotatably connected inside the protective box. A turbine is fixedly sleeved on the first valve shaft. The turbine meshes with the worm. A scale slider is fixedly connected to the first valve shaft. The scale slider is movably arranged in the scale groove.

[0007] Preferably, a first shaft sleeve is arranged at the lower end of the protective box. The first shaft sleeve is connected to the protective box in a communicating manner. A sealing sleeve is fixedly sleeved inside the first shaft sleeve. The first valve shaft is movably arranged inside the sealing sleeve. A valve body is arranged at the lower end of the first shaft sleeve. The valve body is connected to the first shaft sleeve and the sealing sleeve in a communicating manner.

[0008] Preferably, a first fixing block is arranged inside the valve body. The first valve shaft is fixedly inserted into the first fixing block. A second fixing block is arranged at the lower end of the first fixing block. A second valve shaft is fixedly inserted into the second fixing block.

[0009] Preferably, valve mechanisms are fixedly installed at both ends of the first fixing block and the second fixing block. The two valve mechanisms include butterfly plates. The two butterfly plates are respectively fixedly connected to both ends of the first fixing block and the second fixing block. Sealing gaskets are arranged on one side of the two butterfly plates. Fixing plates are arranged on one side of the two sealing gaskets. A number of second connection holes are formed in the butterfly plates, the sealing gaskets and the fixing plates. A number of fixing screws are arranged on one side of the fixing plate. The number of fixing screws penetrate through the number of fixing screws to fixedly connect the butterfly plates, the sealing gaskets and the fixing plates.

[0010] Preferably, two sealing rings are equidistantly installed in the valve body. The two valve mechanisms are located between the two sealing rings. First connecting plates are fixedly connected to both ends of the valve body. A number of first connection holes are formed in the two first connecting plates.

[0011] Preferably, a second shaft sleeve is connected to the end of the valve body far from the first shaft sleeve in a communicating manner. The second valve shaft is movably arranged in the second shaft sleeve. A second connecting plate is fixedly connected to the lower end of the second shaft sleeve. A sealing plate is arranged at the lower end of the second connecting plate. Four third connection holes are formed in the second connecting plate and the sealing plate. Four bolts are arranged at the lower end of the sealing plate. The four bolts respectively penetrate through the four third connection holes to fixedly connect the second connecting plate and the sealing plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. By setting the scale slider and the scale groove, the utility model can solve the problem of low accuracy in flow regulation of traditional butterfly valves. By rotating the runner, the worm in the protective box rotates, enabling the turbine and the worm to mesh and drive each other, causing the first valve shaft to rotate. At this time, the set scale slider slides in the scale groove. The maximum scale on the set scale groove is 90°, the minimum scale is 0°, and the interval between each scale is 15°. When the scale is 0°, the butterfly valve is in a completely sealed and closed state. When the scale is 90°, the butterfly valve is in a completely open state. Such a setting can achieve precise regulation of the flow rate of the butterfly valve by observing the scale slider inside, effectively solving the problem of low accuracy in flow regulation of traditional butterfly valves.

[0014] 2. By setting the two valve mechanisms and the two sealing rings, the utility model can solve the problem that the sealing performance of the butterfly valve will decline during long-term use. The two sealing rings can cooperate with the two valve mechanisms in the valve body to achieve a double-sealing effect. The set valve mechanism is fixedly connected by a number of fixing screws passing through a number of second connection holes in the butterfly plate, the sealing gasket and the fixing plate. Such a setting facilitates the disassembly and replacement of the valve mechanism components. Such a setting achieves double sealing, effectively solving the problem that the sealing performance of the butterfly valve will decline during long-term use.

[0015] The parts not involved in this device are the same as the prior art or can be implemented using the prior art. Description of the Drawings

[0016] Figure 1 This is a schematic diagram of the overall structure of a flow - adjustable butterfly valve of the present utility model from the first perspective.

[0017] Figure 2 This is a schematic diagram of the overall structure of a flow - adjustable butterfly valve of the present utility model from the second perspective.

[0018] Figure 3 This is a schematic diagram of the open state of the two valve mechanisms of a flow - adjustable butterfly valve of the present utility model.

[0019] Figure 4 This is a cross - sectional view of the protective box of a flow - adjustable butterfly valve of the present utility model.

[0020] Figure 5 This is a half - cross - sectional view of a flow - adjustable butterfly valve of the present utility model.

[0021] Figure 6 This is an exploded view of a flow - adjustable butterfly valve of the present utility model.

[0022] Figure 7 This is a schematic diagram of the two valve mechanisms, the first fixing block and the second fixing block of a flow - adjustable butterfly valve of the present utility model.

[0023] Figure 8 This is an exploded view of the valve mechanism of a flow - adjustable butterfly valve of the present utility model.

[0024] Figure 9 This is a Figure 1 magnified view of A in a flow - adjustable butterfly valve of the present utility model.

[0025] In the figure: 1. Valve body; 2. First shaft sleeve; 3. Protective box; 4. Scale groove; 5. First valve shaft; 6. Scale slider; 7. Turbine; 8. Worm; 9. Runner; 10. First fixing block; 11. Second fixing block; 12. Second valve shaft; 13. Butterfly plate; 14. Sealing gasket; 15. Fixing screw; 16. Fixing plate; 17. Sealing sleeve; 18. First connecting plate; 19. First connecting hole; 20. Second shaft sleeve; 21. Second connecting plate; 22. Sealing plate; 23. Bolt; 24. Sealing ring; 25. Valve mechanism. Detailed Embodiments

[0026] To make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] As Figure 1 - Figure 9 shown, a flow adjustable butterfly valve includes a protective box 3. A worm 8 is arranged inside the protective box 3. One end of the worm 8 is rotatably connected to the inner wall of the protective box 3. A runner 9 is fixedly installed at the end of the worm 8 away from the protective box 3. A scale groove 4 is formed on the protective box 3. A first valve shaft 5 is rotatably connected inside the protective box 3. A turbine 7 is fixedly sleeved on the first valve shaft 5. The turbine 7 meshes with the worm 8. A scale slider 6 is fixedly connected to the first valve shaft 5. The scale slider 6 is movably arranged in the scale groove 4. By adopting the above technical solution: by rotating the runner 9, the worm 8 inside the protective box 3 rotates, the turbine 7 and the worm 8 mesh and drive each other, so that the first valve shaft 5 rotates. At this time, the set scale slider 6 slides in the scale groove 4. The maximum scale on the set scale groove 4 is 90°, the minimum scale is 0°, and the interval between each scale is 15°. When the scale is 0°, the butterfly valve is in a completely sealed and closed state. When the scale is 90°, the butterfly valve is in a completely open state. Such a setting can accurately adjust the flow of the butterfly valve by observing the scale slider 6 inside.

[0028] As Figure 1 - Figure 5 shown, a first bushing 2 is arranged at the lower end of the protective box 3. The first bushing 2 is connected to the protective box 3 in a communicating way. A sealing sleeve 17 is fixedly sleeved inside the first bushing 2. The first valve shaft 5 is movably arranged inside the sealing sleeve 17. A valve body 1 is arranged at the lower end of the first bushing 2. The valve body 1 is connected to the first bushing 2 and the sealing sleeve 17 in a communicating way. By adopting the above technical solution: the set protective box 3 can prevent components from being damaged. The sealing sleeve 17 inside the set first bushing 2 can play a sealing role for the first valve shaft 5 between the valve body 1 and the protective box 3.

[0029] As Figure 7 shown, a first fixing block 10 is arranged inside the valve body 1. The first valve shaft 5 is fixedly inserted into the first fixing block 10. A second fixing block 11 is arranged at the lower end of the first fixing block 10. A second valve shaft 12 is fixedly inserted into the second fixing block 11. By adopting the above technical solution: the first valve shaft 5 inside the valve body 1 is fixedly inserted into the first fixing block 10. When the first valve shaft 5 rotates, the first fixing block 10 can be rotated simultaneously. The set second valve shaft 12 is fixedly inserted into the second fixing block 11. When the second valve shaft 12 rotates, the second fixing block 11 can be rotated simultaneously.

[0030] As Figure 6 - Figure 8As shown, valve mechanisms 25 are fixedly installed at both ends of the first fixed block 10 and the second fixed block 11. The two valve mechanisms 25 include butterfly plates 13. The two butterfly plates 13 are respectively fixedly connected to both ends of the first fixed block 10 and the second fixed block 11. Sealing gaskets 14 are arranged on one side of the two butterfly plates 13. Fixed plates 16 are arranged on one side of the two sealing gaskets 14. A number of second connection holes are provided on the butterfly plates 13, the sealing gaskets 14, and the fixed plates 16. A number of fixing screws 15 are arranged on one side of the fixed plate 16. The number of fixing screws 15 penetrate through the number of fixing screws 15 to fixedly connect the butterfly plates 13, the sealing gaskets 14, and the fixed plates 16. By adopting the above technical solution: The first fixed block 10 and the second fixed block 11 provided can play a role in fixedly connecting the two valve mechanisms 25. The valve mechanism 25 provided is fixedly connected by a number of fixing screws 15 penetrating through a number of second connection holes on the butterfly plates 13, the sealing gaskets 14, and the fixed plates 16. Such a setting facilitates the disassembly and replacement of the components of the valve mechanism 25.

[0031] As Figure 6 shown, two sealing rings 24 are equidistantly installed in the valve body 1. The two valve mechanisms 25 are located between the two sealing rings 24. Both ends of the valve body 1 are fixedly connected with first connecting plates 18. A number of first connection holes 19 are provided on the two first connecting plates 18. By adopting the above technical solution: The two sealing rings 24 provided can cooperate with the two valve mechanisms 25 in the valve body 1 to achieve a double-sealing effect. The first connecting plates 18 and the number of first connection holes 19 provided can facilitate the connection with external pipelines.

[0032] As Figure 5 - Figure 6 shown, the valve body 1 is connected to a second shaft sleeve 20 in communication at one end away from the first shaft sleeve 2. The second valve shaft 12 is movably arranged in the second shaft sleeve 20. The second shaft sleeve 20 is fixedly connected to a second connecting plate 21 at the lower end. A sealing plate 22 is arranged at the lower end of the second connecting plate 21. Four third connection holes are provided on both the second connecting plate 21 and the sealing plate 22. Four bolts 23 are arranged at the lower end of the sealing plate 22. The four bolts 23 respectively penetrate through the four third connection holes to fixedly connect the second connecting plate 21 and the sealing plate 22. By adopting the above technical solution: The second valve shaft 12 provided can rotate in the second shaft sleeve 20. The second connecting plate 21 and the sealing plate 22 provided can be fixedly connected by four bolts 23 respectively penetrating through the four third connection holes, and the sealing effect of the second shaft sleeve 20 can be achieved.

[0033] It should be noted that the present utility model is a flow adjustable butterfly valve. When in use, first connect the first connecting plates 18 at both ends of the valve body 1 to the external conveying pipeline through a plurality of first connecting holes 19. After connection, rotate the runner 9 to make the worm 8 in the protection box 3 rotate, so that the turbine 7 and the worm 8 are engaged and driven with each other, and the first valve shaft 5 rotates. At this time, the set scale slider 6 slides in the scale groove 4. The maximum scale on the set scale groove 4 is 90°, the minimum scale is 0°, and the interval between each scale is 15°. When the scale is 0°, the butterfly valve is in a completely sealed and closed state, and when the scale is 90°, the butterfly valve is in a completely open state. Such a setting can achieve precise adjustment of the flow rate of the butterfly valve by observing the scale slider 6 inside;

[0034] The sealing sleeve 17 in the set first shaft sleeve 2 can seal the first valve shaft 5 between the valve body 1 and the protection box 3. When the first valve shaft 5 rotates, the first fixing block 10 can be rotated simultaneously, driving the two valve mechanisms 25 to rotate and open and close. At this time, the second fixing block 11 between the two valve mechanisms 25 drives the second valve shaft 12 to rotate in the second shaft sleeve 20. Through the set second connecting plate 21 and the sealing plate 22, and then through four bolts 23 respectively inserted through four third connecting holes for fixed connection, the sealing effect of the second shaft sleeve 20 can be achieved. Through the set two sealing rings 24, a double-sealing effect can be achieved in cooperation with the two valve mechanisms 25 inside the valve body 1. The set valve mechanism 25 is fixedly connected through a plurality of fixing screws 15 inserted through a plurality of second connecting holes on the butterfly plate 13, the sealing gasket 14, and the fixing plate 16. Such a setting facilitates the disassembly and replacement of the components of the valve mechanism 25, and such a setting realizes double sealing and effectively improves the overall sealing performance of the butterfly valve.

[0035] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A flow-adjustable butterfly valve, comprising a protection box (3), characterized in that: A worm (8) is arranged in the protection box (3), one end of the worm (8) is rotatably connected to the inner wall of the protection box (3), and a rotating wheel (9) is fixedly mounted on the end of the worm (8) away from the protection box (3). A scale groove (4) is provided on the protection box (3), and a first valve shaft (5) is rotatably connected in the protection box (3). A turbine (7) is fixedly sleeved on the first valve shaft (5), and the turbine (7) and the worm (8) are meshed with each other. A scale slider (6) is fixedly connected to the first valve shaft (5), and the scale slider (6) is movably arranged in the scale groove (4).

2. A flow-adjustable butterfly valve according to claim 1, characterized in that: A first shaft sleeve (2) is disposed at the lower end of the protection box (3), the first shaft sleeve (2) is in communication with the protection box (3), a sealing sleeve (17) is fixedly sleeved inside the first shaft sleeve (2), the first valve shaft (5) is movably disposed inside the sealing sleeve (17), a valve body (1) is disposed at the lower end of the first shaft sleeve (2), the valve body (1) is in communication with the first shaft sleeve (2) and the sealing sleeve (17).

3. A flow-adjustable butterfly valve according to claim 2, characterized in that: A first fixing block (10) is arranged in the valve body (1), the first valve shaft (5) is fixedly inserted in the first fixing block (10), a second fixing block (11) is arranged at the lower end of the first fixing block (10), and a second valve shaft (12) is fixedly inserted in the second fixing block (11).

4. A flow-adjustable butterfly valve according to claim 3, characterized in that: Both ends of the first fixed block (10) and the second fixed block (11) are fixedly mounted with valve mechanisms (25), the two valve mechanisms (25) comprising butterfly plates (13), the two butterfly plates (13) being fixedly connected to both ends of the first fixed block (10) and the second fixed block (11), respectively, one side of the two butterfly plates (13) being provided with sealing gaskets (14), one side of the two sealing gaskets (14) being provided with fixing plates (16), the butterfly plates (13), the sealing gaskets (14) and the fixing plates (16) being provided with a plurality of second connecting holes, one side of the fixing plates (16) being provided with a plurality of fixing screws (15), the plurality of fixing screws (15) being inserted through the plurality of fixing screws (15) to fix the butterfly plates (13), the sealing gaskets (14) and the fixing plates (16) together.

5. The flow-adjustable butterfly valve according to claim 4, characterized in that: Two sealing rings (24) are equidistantly installed in the valve body (1), and the two valve mechanisms (25) are located between the two sealing rings (24). Both ends of the valve body (1) are fixedly connected to a first connecting plate (18), and the two first connecting plates (18) are each provided with a plurality of first connecting holes (19).

6. The flow-adjustable butterfly valve according to claim 5, characterized in that: The valve body (1) is connected to a second sleeve (20) at one end away from the first sleeve (2); the second valve shaft (12) is movably arranged in the second sleeve (20); the lower end of the second sleeve (20) is fixedly connected to a second connecting plate (21); the lower end of the second connecting plate (21) is provided with a sealing plate (22); the second connecting plate (21) and the sealing plate (22) are both provided with four third connecting holes; the lower end of the sealing plate (22) is provided with four bolts (23); the four bolts (23) are respectively inserted through the four third connecting holes to fixedly connect the second connecting plate (21) and the sealing plate (22).

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