Butterfly valve limiting and locking device

Abstract

The utility model discloses a butterfly valve limiting and locking device, which relates to the technical field of butterfly valves, and comprises a butterfly valve body, a valve rod is arranged at the top of the butterfly valve body, a shell is fixedly mounted at the top of the butterfly valve body, a gear is fixedly mounted on the outer side of the valve rod and positioned in the shell, and the gear is connected with the valve rod. The valve has the advantages that the sliding rod, the mounting plate and the clamping teeth can be driven to laterally move by laterally pulling the pulling plate, meanwhile, the spring is squeezed by the mounting plate, and after the clamping teeth laterally move, limiting on the gear and the valve rod can be relieved; then the valve rod can be rotated through the rotating disc to enable the valve plate to incline to open the valve, and when the valve is opened to the required flow, the pulling plate is loosened to enable the spring to rebound, so that the mounting plate and the clamping teeth are pushed to displace, and the gear and the valve rod are clamped through the clamping teeth to lock the valve rod; the situation that the flow changes due to the fact that the impact force of water flow in the valve body of the butterfly valve is large and impacts the valve plate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a position limiting locking device for butterfly valves. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a role of cutting off and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] At present, the existing butterfly valves do not have a device for limit locking. After the valve plate is opened, the water pressure in the valve body is relatively large and the valve plate will be subjected to a large water flow impact pressure when the valve plate is opened at a small angle. This can easily cause the valve plate to be opened due to the impact force, thereby changing the flow rate. For this reason, we propose a butterfly valve limit locking device. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a butterfly valve limit locking device, which solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a butterfly valve limit locking device, including a butterfly valve body, a valve stem is arranged on the top of the butterfly valve body, a shell is fixedly installed on the top of the butterfly valve body, a gear is fixedly installed on the outside of the valve stem and inside the shell, a limit plate is fixedly installed inside the shell and on one side of the gear, two sliding rods are slidably installed inside the limit plate, a mounting plate is fixedly installed on one end of the sliding rod, a latch tooth is fixedly installed on one side of the mounting plate, the latch tooth cooperates with the gear, a spring is installed on the outside of the sliding rod and on one side of the mounting plate, the spring cooperates with the limit plate, and one end of the sliding rod extends to the outside of the shell and a pull plate is fixedly installed.

[0006] Preferably, a support plate is fixedly installed on the top of the shell, a circular plate is fixedly installed on the top of the support plate, an arc-shaped groove is opened inside the circular plate, a mounting rod is fixedly installed on one side of the valve stem, a benchmark rod is fixedly installed on the bottom of the mounting rod, the benchmark rod is slidably connected to the arc-shaped groove, an angle mark is provided on the top of the circular plate and on one side of the arc-shaped groove, and the benchmark rod cooperates with the angle mark.

[0007] Preferably, a turntable is fixedly mounted on one end of the valve stem.

[0008] Preferably, flanges are provided on both sides of the butterfly valve body.

[0009] Preferably, a hole cooperating with the slide rod is opened inside the limiting plate, and a hole cooperating with the slide rod is opened inside one side of the shell.

[0010] Preferably, the shell and the circular plate are both provided with holes cooperating with the valve stem.

[0011] The utility model provides a butterfly valve limit locking device, which has the following beneficial effects:

[0012] 1. The butterfly valve limit locking device is coordinated through the housing, gear, limit plate, slide bar, mounting plate, latch teeth, spring and pull plate. During use, the slide bar, mounting plate and latch teeth can be driven to move sideways by pulling the pull plate from the side. At the same time, the mounting plate squeezes the spring. After the latch teeth move sideways, the limit on the gear and valve stem can be released. Then, the valve stem can be rotated by the turntable to tilt the valve plate and open the valve. When the valve is opened to the required flow rate, the pull plate can be released to make the spring rebound, thereby pushing the mounting plate and the latch teeth to move. The latch teeth can clamp the gear and valve stem to lock the valve stem, thereby avoiding the situation where the flow rate changes due to the large impact force of the water flow in the butterfly valve body impacting the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 It is a top sectional view of the utility model;

[0016] Figure 4 It is a partial schematic diagram of a top view of the utility model;

[0017] Figure 5 For this utility model Figure 2 A in the enlarged view;

[0018] Figure 6 For this utility model Figure 2 Enlarged view of point B in .

[0019] In the figure: 1. butterfly valve body; 2. valve stem; 3. housing; 4. gear; 5. limit plate; 6. slide rod; 7. mounting plate; 8. latching teeth; 9. spring; 10. pull plate; 11. support plate; 12. round plate; 13. arc groove; 14. mounting rod; 15. benchmark; 16. angle mark; 17. turntable; 18. flange. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figures 1 to 6 The utility model provides a technical solution: a butterfly valve limit locking device, including a butterfly valve body 1, a valve stem 2 is arranged on the top of the butterfly valve body 1, a turntable 17 is fixedly installed on one end of the valve stem 2, flanges 18 are arranged on both sides of the butterfly valve body 1, a shell 3 is fixedly installed on the top of the butterfly valve body 1, a gear 4 is fixedly installed on the outside of the valve stem 2 and located inside the shell 3, a limit plate 5 is fixedly installed inside the shell 3 and located on one side of the gear 4, two slide bars 6 are slidably installed inside the limit plate 5, a mounting plate 7 is fixedly installed on one end of the slide bar 6, a latch tooth 8 is fixedly installed on one side of the mounting plate 7, the latch tooth 8 cooperates with the gear 4, a spring 9 is installed on the outside of the slide bar 6 and located on one side of the mounting plate 7, the spring 9 cooperates with the limit plate 5, one end of the slide bar 6 extends to the outside of the shell 3 and a pull plate 10 is fixedly installed, a hole matching with the slide bar 6 is opened inside the limit plate 5, and a hole matching with the slide bar 6 is opened inside one side of the shell 3.

[0022] A support plate 11 is fixedly installed on the top of the shell 3, and a circular plate 12 is fixedly installed on the top of the support plate 11. Holes that cooperate with the valve stem 2 are provided inside the shell 3 and the circular plate 12, and an arc groove 13 is provided inside the circular plate 12. A mounting rod 14 is fixedly installed on one side of the valve stem 2, and a benchmark 15 is fixedly installed on the bottom of the mounting rod 14. The benchmark 15 is slidably connected with the arc groove 13. An angle mark 16 is provided on the top of the circular plate 12 and on one side of the arc groove 13, and the benchmark 15 cooperates with the angle mark 16. The functions of the circular plate 12, the arc groove 13, the mounting rod 14, the benchmark 15 and the angle mark 16 are used to know the rotation opening angle of the valve stem 2. By observing the benchmark 15 and the angle mark 16, the flow rate after the valve plate is opened can be obtained, which is convenient for opening the valve plate according to the flow demand.

[0023] In summary, when the butterfly valve limit locking device is in use, the sliding rod 6, the mounting plate 7 and the latching tooth 8 can be driven to move sideways by pulling the pull plate 10 from the side. At the same time, the mounting plate 7 squeezes the spring 9. After the latching tooth 8 moves sideways, the limit on the gear 4 and the valve stem 2 can be released. Then, the valve stem 2 can be rotated by the turntable 17 to tilt the valve plate and open the valve. When the valve is opened to the required flow rate, the pull plate 10 can be released to allow the spring 9 to rebound, thereby pushing the mounting plate 7 and the latching tooth 8 to move. The gear 4 and the valve stem 2 can be clamped by the latching tooth 8 to lock the valve stem 2, thereby avoiding the situation where the flow rate changes due to the large impact force of the water flow in the butterfly valve body 1 impacting the valve plate. After the valve stem 2 is rotated to open the valve, the flow rate after the valve plate is opened can be obtained by observing the benchmark 15 and the angle mark 16, so that the valve plate can be opened according to the flow demand.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A butterfly valve limit locking device, comprising a butterfly valve body (1), characterized in that: A valve stem (2) is arranged on the top of the butterfly valve body (1), a shell (3) is fixedly installed on the top of the butterfly valve body (1), a gear (4) is fixedly installed on the outside of the valve stem (2) and located inside the shell (3), a limit plate (5) is fixedly installed inside the shell (3) and located on one side of the gear (4), two slide rods (6) are slidably installed inside the limit plate (5), a mounting plate (7) is fixedly installed on one end of the slide rod (6), a latching tooth (8) is fixedly installed on one side of the mounting plate (7), and the latching tooth (8) cooperates with the gear (4), a spring (9) is installed on the outside of the slide rod (6) and located on one side of the mounting plate (7), and the spring (9) cooperates with the limit plate (5), and one end of the slide rod (6) extends to the outside of the shell (3) and is fixedly installed with a pull plate (10).

2. A butterfly valve limit locking device according to claim 1, characterized in that: A support plate (11) is fixedly mounted on the top of the shell (3), a circular plate (12) is fixedly mounted on the top of the support plate (11), an arc-shaped groove (13) is provided inside the circular plate (12), a mounting rod (14) is fixedly mounted on one side of the valve stem (2), a reference rod (15) is fixedly mounted on the bottom of the mounting rod (14), the reference rod (15) is slidably connected to the arc-shaped groove (13), an angle mark (16) is provided on the top of the circular plate (12) and on one side of the arc-shaped groove (13), and the reference rod (15) cooperates with the angle mark (16).

3. A butterfly valve limit locking device according to claim 1, characterized in that: A rotating disk (17) is fixedly mounted on one end of the valve stem (2).

4. A butterfly valve limit locking device according to claim 1, characterized in that: Flanges (18) are provided on both sides of the butterfly valve body (1).

5. A butterfly valve limit locking device according to claim 1, characterized in that: A hole cooperating with the slide rod (6) is provided inside the limit plate (5), and a hole cooperating with the slide rod (6) is provided inside one side of the housing (3).

6. A butterfly valve limit locking device according to claim 1, characterized in that: The shell (3) and the circular plate (12) are both provided with holes inside thereof to match the valve stem (2).

Images