Butterfly valve with locking and closing functions

Abstract

The utility model discloses a butterfly valve with a locking and closing function, which comprises a valve body and a valve plate which rotates the valve body and is connected to the inside of the valve body, the valve plate is connected with a valve rod, the top of the valve body is connected with a sleeve, the valve rod is connected to the sleeve in a rotating and sealing mode, and the top of the valve rod is connected with a rotating handle used for driving the valve plate to rotate. A fixing disc is fixed to the top of the sleeve and provided with a tooth part, the rotating handle is connected with a positioning mechanism used for positioning the valve plate, the positioning mechanism comprises a toothed plate, a lifting plate, a second spring and a connecting rod, the toothed plate is matched with the tooth part, the lifting plate is used for guiding the toothed plate, the second spring is used for driving the toothed plate to move upwards, and the connecting rod is connected with the rotating handle. The end of the connecting rod is fixedly connected with the lifting plate, and the connecting rod is connected with a driving mechanism used for driving the toothed plate to descend. The valve rod and the valve plate can be limited, and the situation that due to the fact that the impact force of water flow in the valve body is large, the valve plate is impacted, and the flow changes is avoided.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a butterfly valve with locking closure. Background Technology

[0002] Valves are mechanical devices used in pipeline systems to control the flow of fluids (liquids, gases, slurries, etc.). They control parameters such as flow rate, pressure, and flow direction by opening, closing, or adjusting the cross-sectional area of ​​the flow channel. A butterfly valve, also called a flap valve, is a type of valve. It is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by its closing element (valve disc or butterfly plate) being a disk that rotates around the valve shaft to achieve opening and closing.

[0003] When existing butterfly valves are in use, the valve plate is open and at a certain angle. When the water pressure in the valve body suddenly increases, the valve plate will be subjected to a large water flow impact pressure, which can easily cause the valve plate to be blown open due to the impact force, thereby changing the flow rate and affecting the performance. Utility Model Content

[0004] The purpose of this utility model is to provide a butterfly valve with locking closure, which can limit the valve stem and valve plate, and avoid the situation where the flow rate changes due to the impact of large water flow in the valve body on the valve plate. This solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve with locking closure, comprising a valve body and a valve plate connected to the valve body via a rotating valve body. The valve plate is connected to a valve stem. A sleeve is connected to the top of the valve body. The valve stem is rotatably and sealingly connected to the sleeve, and a rotating handle for driving the valve plate to rotate is connected to the top of the valve stem. A fixing disc is fixed to the top of the sleeve. The fixing disc is provided with teeth. The rotating handle is connected to a positioning mechanism for positioning the valve plate. The positioning mechanism includes a toothed plate, a lifting plate, a second spring, and a connecting rod. The toothed plate matches the teeth. The lifting plate guides the toothed plate. The second spring drives the toothed plate to move upward. The end of the connecting rod is fixedly connected to the lifting plate, and the connecting rod is connected to a driving mechanism for driving the toothed plate to move downward.

[0006] Preferably, the positioning mechanism further includes a slide groove, which is disposed on the rotating handle, and the lifting plate is slidably connected to the slide groove.

[0007] Preferably, the second spring is located in the slide groove, and both ends of the second spring are connected to the lifting plate and the rotating handle.

[0008] Preferably, the driving mechanism includes a handle, a first spring, a bearing seat, a pressing plate, and multiple anti-slip grooves. The bearing seat is fixed to the rotating handle, the handle is rotatably connected to the bearing seat via a shaft, the pressing plate is connected to the end of the handle, and the pressing plate matches the top of the connecting rod. The two ends of the first spring are connected to the rotating handle and the handle, and multiple anti-slip grooves are provided on the handle.

[0009] Preferably, the top of the connecting rod is a hemispherical structure, and the connecting rod is movably connected to the pressing plate.

[0010] Preferably, the anti-slip groove has an arc-shaped cross-section, and the spacing between adjacent anti-slip grooves is equal.

[0011] Preferably, a rotating head is connected to the top of the valve stem, and the rotating head is fixedly connected to the rotating handle.

[0012] Preferably, the top of the fixed disk is provided with scale lines, and the rotating head is connected to a pointer, which matches the scale lines.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting a positioning mechanism and a driving mechanism, allows the pressing plate to rotate around the shaft of the bearing seat when the handle is gripped. The pressing plate presses against the connecting rod, and the two slide relative to each other, causing the connecting rod and the lifting plate to move down synchronously. The second spring is stretched, and the lifting plate drives the toothed plate to move down, causing the toothed plate to separate from the toothed part, thereby releasing the valve stem. Then, the rotating handle is driven to rotate, which in turn drives the valve stem and valve plate to rotate, facilitating the control of liquid flow. Then, the handle is released, and the stretched second spring pulls the lifting plate up, connecting the toothed plate with the toothed part, thereby limiting the valve stem and valve plate and avoiding the situation where the flow rate changes due to the large impact force of the water flow in the valve body impacting the valve plate. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 for Figure 1 A partial view;

[0016] Figure 3 This is a schematic diagram of the connection structure between the positioning mechanism and the driving mechanism of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure between the lifting plate and the rotating handle of this utility model.

[0018] In the diagram: 1. Valve body; 2. Valve plate; 3. Sleeve; 4. Fixed plate; 5. Valve stem; 6. Rotating head; 7. Rotating handle; 8. Handle; 9. Spring 1; 10. Shaft seat; 11. Lifting plate; 12. Scale line; 13. Pointer; 14. Gear; 15. Gear plate; 16. Connecting rod; 17. Pressing plate; 18. Anti-slip groove; 19. Spring 2; 20. Slide groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 4 This utility model provides a butterfly valve with locking closure, including a valve body 1 and a valve plate 2 connected to the valve body 1. The valve plate 2 is connected to a valve stem 5. A sleeve 3 is connected to the top of the valve body 1. The valve stem 5 is rotatably and sealingly connected to the sleeve 3 to improve the sealing performance of the connection between the two. A rotating handle 7 for driving the valve plate 2 to rotate is connected to the top of the valve stem 5. A fixing plate 4 is fixed to the top of the sleeve 3. The fixing plate 4 is provided with teeth 14. A positioning mechanism for positioning the valve plate 2 is connected to the rotating handle 7. The positioning mechanism includes a toothed plate 15, a lifting plate 11, a second spring 19, and a connecting rod 16. The toothed plate 15 matches the teeth 14. The lifting plate 11 is used to guide the toothed plate 15. The second spring 19 is used to drive the toothed plate 15 to move upward. The end of the connecting rod 16 is fixedly connected to the lifting plate 11, and the connecting rod 16 is connected to a driving mechanism for driving the toothed plate 15 to move downward.

[0021] In use, gripping handle 8 compresses spring 9, causing handle 8 to drive pressing plate 17 to rotate around the axis of bearing seat 10. Pressing plate 17 presses against connecting rod 16, causing them to slide relative to each other. Connecting rod 16 drives lifting plate 11 and toothed plate 15 to move downwards simultaneously, separating toothed plate 15 from toothed part 14, thus releasing valve stem 5 and valve plate 2. At this time, spring 19 is in a stretched state. Then, rotating handle 7 is driven to rotate, simultaneously driving rotating head 6, valve stem 5, and valve plate 2 to rotate, thereby facilitating liquid flow control. When valve plate 2 has rotated to a suitable angle, releasing handle 8 causes compressed spring 9 to drive handle 8 to rotate back, while stretched spring 19 drives lifting plate 11 and toothed plate 15 to move upwards, connecting toothed plate 15 with toothed part 14, thereby limiting valve stem 5 and valve plate 2 and preventing changes in flow rate caused by the impact of large water flow in valve body 1 impacting valve plate 2.

[0022] The positioning mechanism also includes a slide groove 20, which is provided on the rotating handle 7. The lifting plate 11 is slidably connected to the slide groove 20, which improves the stability of the lifting plate 11 and provides a good guiding effect for the toothed plate 15, making it convenient to connect with the toothed part 14.

[0023] Spring 19 is located inside the slide groove 20, and both ends of spring 19 are connected to the lifting plate 11 and the rotating handle 7. When the valve plate 2 is in the positioning state, spring 19 is still in the stretched state, applying an upward pulling force to the lifting plate 11 and the toothed plate 15, thereby improving the stability of the connection between the toothed plate 15 and the toothed part 14.

[0024] The drive mechanism includes a handle 8, a spring 9, a bearing seat 10, a pressing plate 17, and multiple anti-slip grooves 18. The bearing seat 10 is fixed to the rotating handle 7, and the handle 8 is rotatably connected to the bearing seat 10 via a shaft. The pressing plate 17 is connected to the end of the handle 8 and matches the top of the connecting rod 16. Both ends of the spring 9 are connected to the rotating handle 7 and the handle 8. Multiple anti-slip grooves 18 are provided on the handle 8. The pressing plate 17 is relatively close to the bearing seat 10, and the right side of the handle 8 is longer, making it a force-saving lever, and operating the handle 8 requires less effort. The anti-slip grooves 18 increase the friction with the hand, facilitating the operation of the handle 8.

[0025] The top of the connecting rod 16 is a hemispherical structure, and the connecting rod 16 and the pressing plate 17 are movably connected. The hemispherical structure reduces the contact friction between the connecting rod 16 and the pressing plate 17 when they slide relative to each other.

[0026] The anti-slip groove 18 has an arc-shaped cross-section, and the spacing between adjacent anti-slip grooves 18 is equal.

[0027] A rotating head 6 is connected to the top of the valve stem 5. The rotating head 6 is fixedly connected to the rotating handle 7. The rotation of the rotating handle 7 can drive the rotating head 6 to rotate, and the rotating head 6 drives the valve stem 5 to rotate, thereby realizing the rotation of the valve plate 2. This facilitates the control of the rotation angle of the valve plate 2 and realizes the regulation of the flow rate.

[0028] The top of the fixed plate 4 is equipped with a scale line 12, and the rotating head 6 is connected to a pointer 13, which matches the scale line 12. When the rotating head 6 rotates, it can synchronously drive the pointer 13 to rotate, allowing observation of the positional relationship between the pointer 13 and the scale line 12. This makes it easier to adjust the rotation angle of the valve plate 2 according to the flow requirements, which is quite intuitive.

[0029] Working principle: When adjusting the flow rate, hold the handle 8 to rotate the pressing plate 17 around the axis of the lifting plate 11. The pressing plate 17 presses against the top of the connecting rod 16, causing them to slide relative to each other. This drives the connecting rod 16, the lifting plate 11, and the toothed plate 15 to move downwards synchronously. The toothed plate 15 separates from the teeth 14, releasing the valve stem 5 and the valve plate 2. At this time, the second spring 19 is in a stretched state, while the first spring 9 is compressed. Then, the rotating handle 7 is driven to rotate, causing the rotating head 6, the valve stem 5, and the valve plate 2 to rotate, making the rotation angle of the valve plate 2 controllable and facilitating liquid flow control. When the valve plate 2 is at a suitable angle, release the handle 8. The stretched spring 19 drives the lifting plate 11 and the toothed plate 15 to move upwards, connecting the toothed plate 15 with the teeth 14. This limits the movement of the rotating handle 7, the rotating head 6, the valve stem 5, and the valve plate 2, preventing changes in flow rate caused by the large impact force of water flow inside the valve body 1 impacting the valve plate 2. This method is highly practical.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve with locking closure, characterized in that, The valve body (1) includes a valve plate (2) connected to the valve body (1) and a rotary valve body (1). The valve plate (2) is connected to a valve stem (5). A sleeve (3) is connected to the top of the valve body (1). The valve stem (5) is rotatably and sealingly connected to the sleeve (3). A rotary handle (7) for driving the valve plate (2) to rotate is connected to the top of the valve stem (5). A fixed plate (4) is fixed to the top of the sleeve (3). The fixed plate (4) is provided with teeth (14). The rotary handle (7) is connected to a useful... The positioning mechanism for positioning the valve plate (2) includes a toothed plate (15), a lifting plate (11), a second spring (19), and a connecting rod (16). The toothed plate (15) matches the toothed part (14). The lifting plate (11) is used to guide the toothed plate (15). The second spring (19) is used to drive the toothed plate (15) to move upward. The end of the connecting rod (16) is fixedly connected to the lifting plate (11), and the connecting rod (16) is connected to a driving mechanism for driving the toothed plate (15) to descend.

2. A butterfly valve with locking closure according to claim 1, characterized in that, The positioning mechanism further includes a slide groove (20), which is disposed on the rotating handle (7), and the lifting plate (11) is slidably connected to the slide groove (20).

3. A butterfly valve with locking closure according to claim 2, characterized in that, The second spring (19) is located in the slide groove (20), and both ends of the second spring (19) are connected to the lifting plate (11) and the rotating handle (7).

4. A butterfly valve with locking closure according to claim 1, characterized in that, The drive mechanism includes a handle (8), a spring (9), a bearing seat (10), a pressing plate (17), and multiple anti-slip grooves (18). The bearing seat (10) is fixed to the rotating handle (7). The handle (8) is rotatably connected to the bearing seat (10) via a shaft. The pressing plate (17) is connected to the end of the handle (8) and matches the top of the connecting rod (16). The two ends of the spring (9) are connected to the rotating handle (7) and the handle (8). Multiple anti-slip grooves (18) are provided on the handle (8).

5. A butterfly valve with locking closure according to claim 4, characterized in that, The top of the connecting rod (16) is a hemispherical structure, and the connecting rod (16) is movably connected to the pressing plate (17).

6. A butterfly valve with locking closure according to claim 4, characterized in that, The anti-slip groove (18) has an arc-shaped cross-section, and the spacing between adjacent anti-slip grooves (18) is equal.

7. A butterfly valve with locking closure according to claim 1, characterized in that, The top of the valve stem (5) is connected to a rotating head (6), which is fixedly connected to the rotating handle (7).

8. A butterfly valve with locking closure according to claim 7, characterized in that, The top of the fixed disk (4) is provided with a scale line (12), and the rotating head (6) is connected to a pointer (13), which matches the scale line (12).

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