Quick-acting eccentric butterfly valve

Abstract

The utility model discloses a quick-action eccentric butterfly valve, which relates to the field of butterfly valves and comprises a valve body, a limit ring is mounted in the valve body, two butterfly plates are mounted in the valve body, the surfaces of the two butterfly plates abut against the surface of the limit ring, and the two butterfly plates are mounted and connected through a mounting hinge. Mounting shafts are mounted on the surfaces of the two butterfly plates, the two mounting shafts are located at the two ends of the butterfly plates respectively, and the two mounting shafts are concentric shafts. According to the eccentric butterfly valve capable of acting quickly, the butterfly plates, the first bearing and the installation hinge are arranged, the two butterfly plates are combined into a circular plate, installation is conducted through the first bearing and the installation shaft, the first bearing can guarantee stable and smooth rotation of the butterfly plates, meanwhile, the two butterfly plates are installed through the installation hinge, and therefore the installation efficiency is improved. The two butterfly plates can be opened and closed, the tightness of connection between the two butterfly plates is guaranteed, meanwhile, the two butterfly plates can be closed conveniently through the impact force of fluid, the structure is simple, and the error-tolerant rate is large.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a fast-acting eccentric butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing member (valve disc or butterfly plate) is a disc, which rotates around the valve axis to achieve opening and closing. An eccentric butterfly valve is a type of butterfly valve. The valve stem axis deviates from the center of the disc and the center of the body at the same time. Its structural feature is that the valve stem axis deviates from the center of the butterfly plate, which disperses and reduces the excessive extrusion between the upper and lower ends of the butterfly plate and the valve seat.

[0003] A Chinese patent with patent number CN 202121330474.4 discloses an eccentric butterfly valve. Two adjustment shafts respectively pull two butterflies to rotate through the first push-pull plate and the second push-pull plate thereon. The butterflies rotate on the vertical plate. The two butterfly plates and the vertical plate are spliced ​​into a full circle and the inside of the valve body is sealed. At this time, the fluid in the valve body stops flowing, thereby realizing the rapid closing of the butterfly valve. The overall structure is relatively complex and the transmission is realized through the bevel gears, drive shafts and mounting plates of the power mechanism. The butterfly valve is relatively slow in action. Utility Model Content

[0004] The main purpose of the utility model is to provide a fast-acting eccentric butterfly valve, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fast-acting eccentric butterfly valve, including a valve body, a limit ring is installed inside the valve body, two butterfly plates are installed inside the valve body, the surfaces of the two butterfly plates are against the surface of the limit ring, the two butterfly plates are installed and connected by installing hinges, the surfaces of the two butterfly plates are installed with installation shafts, the two installation shafts are respectively located at the two ends of the butterfly plates, the two installation shafts are concentric shafts, the installation shafts are movably installed inside the valve body, and a stretching component is installed inside the valve body to drive the rotation of the installation shaft.

[0006] The surfaces of the two installation shafts are both fixedly sleeved with first bearings, and the first bearings are embedded in the inner wall of the valve body.

[0007] The stretching assembly includes a rotating rod, which is located on a side away from the limiting ring. Pull ropes are fixedly installed on the surfaces of the two butterfly plates. One end of the pull rope is fixed to the surface of the rotating rod. One end of the rotating rod extends to the outside of the valve body. A driving motor is fixedly installed on the surface of the valve body through a mounting frame, and the output shaft of the driving motor is fixed to the surface of the rotating rod.

[0008] The two ends of the rotating rod are fixedly mounted with second bearings, and the two second bearings are embedded in the inner wall of the valve body. The other end of the rotating rod extends to the outside of the valve body, and the other end of the rotating rod is mounted with a rotating wheel.

[0009] The rotating rod is an electromagnetic rod, the interior of the butterfly plate has magnetic attraction, and the distance from the rotating rod to the butterfly plate is smaller than the radius of the butterfly plate.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. In the utility model, by arranging a butterfly plate, a first bearing and a mounting hinge, two butterfly plates are combined into a circular plate, which are mounted using the first bearing and the mounting shaft. The first bearing can ensure stable and smooth rotation of the butterfly plates. At the same time, the two butterfly plates are mounted by mounting hinges, and the two butterfly plates can be opened and closed, and the tightness of the connection between the two butterfly plates is ensured. At the same time, the impact force of the fluid is conveniently used to close the two butterfly plates. The structure is simple and the fault tolerance rate is large.

[0012] 2. In the utility model, by setting a rotating rod and a butterfly plate, when the rotating rod rotates slightly, the butterfly plate is easily deflected, and the rotating rod is energized to make the surface have greater magnetism, so that the butterfly plate is adsorbed on the surface of the rotating rod, so that the butterfly plate can be quickly opened and the movement speed is improved. When it needs to be closed, the electricity to the surface of the rotating rod is directly disconnected, and the fluid impacts the surface of the butterfly plate to quickly close it. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a fast-acting eccentric butterfly valve of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the rotor position of a fast-acting eccentric butterfly valve of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the driving motor position of a fast-acting eccentric butterfly valve of the utility model;

[0016] Figure 4 The utility model is a schematic diagram of the structure of the installation hinge position of a fast-acting eccentric butterfly valve.

[0017] In the figure: 1. valve body; 2. limit ring; 3. butterfly plate; 4. mounting hinge; 5. mounting shaft; 6. first bearing; 7. rotating rod; 8. pull rope; 9. driving motor; 10. second bearing; 11. rotating wheel. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-4 As shown, a fast-acting eccentric butterfly valve includes a valve body 1. Flanges can be set at the inlet and outlet ends of the valve body 1 to facilitate the installation of the butterfly valve. A limit ring 2 is installed inside the valve body 1. The limit ring 2 and the valve body 1 are an integrated structure and can be produced by casting. Two butterfly plates 3 are installed inside the valve body 1. The two butterfly plates 3 are combined into a circular plate. The diameter of the circular plate is larger than the inner diameter of the limit ring 2 and smaller than the inner diameter of the valve body 1. The surfaces of the two butterfly plates 3 are against the surface of the limit ring 2, and the straight sides of the butterfly plates 3 on both sides are The two butterfly plates 3 are connected by installing hinges 4, and the two butterfly plates 3 are opened and closed to ensure the tightness of the connection. The surfaces of the two butterfly plates 3 are installed with installation shafts 5, and the installation shafts 5 are installed at the corner positions of the straight sides, and the center of the circle and the corner positions are at the same vertical position. The two installation shafts 5 are respectively at the two end positions of the butterfly plates 3, and the two installation shafts 5 are concentric shafts. The installation shafts 5 are movably installed inside the valve body 1, and a stretching component is installed inside the valve body 1 to drive the rotation of the installation shafts 5.

[0020] In the initial position, the butterfly plate 3 is against the surface of the limit ring 2. At this time, the direction of the butterfly plate 3 is opposite to the direction of the fluid. At this time, the butterfly valve is in a closed state. When flow is required, the stretching component is started to pull the butterfly plate 3, and the butterfly plate 3 can be rotated and opened. The rotation direction of the butterfly plate 3 is against the direction of the water flow. When the butterfly valve needs to be closed, the stretching component is no longer subjected to force and can use the impact force of the water flow to rotate the butterfly plate 3 until the butterfly plate 3 is against the surface of the limit ring 2. The greater the impact force of the fluid, the tighter the closure of the butterfly plate 3.

[0021] The surfaces of the two mounting shafts 5 are both fixedly sleeved with first bearings 6 , which are embedded in the inner wall of the valve body 1 . The first bearings 6 can ensure stable and smooth rotation of the butterfly plate 3 .

[0022] The stretching assembly includes a rotating rod 7, which is located on a side away from the limiting ring 2. A pull rope 8 is fixedly installed on the surface of the two butterfly plates 3. The pull rope 8 is connected to the middle position of the arc-shaped side of the butterfly plate 3. One end of the pull rope 8 is fixed to the surface of the rotating rod 7. One end of the rotating rod 7 extends to the outside of the valve body 1. A drive motor 9 is fixedly installed on the surface of the valve body 1 through a mounting frame, and the output shaft of the drive motor 9 is fixed to the surface of the rotating rod 7.

[0023] When the driving motor 9 is started, the rotation of its output shaft will drive the rotating rod 7 to rotate, and the pull rope 8 will be driven to wrap around the surface of the rotating rod 7. The pull rope 8 will drive the butterfly plate 3 to approach the position of the rotating rod 7, thereby indirectly opening the butterfly plate 3. The opening structure is very simple.

[0024] Second bearings 10 are fixedly installed at both ends of the rotating rod 7. Two second bearings 10 are embedded in the inner wall of the valve body 1. The other end of the rotating rod 7 extends to the outside of the valve body 1. A rotating wheel 11 is installed at the other end of the rotating rod 7. The rotating rod 7 can be rotated by controlling the rotating wheel 11. The first bearing 6 and the second bearing 10 are both sealed bearings to ensure the sealing of the inside of the valve body 1.

[0025] The rotating rod 7 is an electromagnetic rod, and the interior of the butterfly plate 3 has magnetic attraction. The distance between the rotating rod 7 and the butterfly plate 3 is smaller than the radius of the butterfly plate 3. When the rotating rod 7 rotates slightly, the butterfly plate 3 can be easily deflected. At this time, the rotating rod 7 can be energized so that its surface has greater magnetism, and the butterfly plate 3 is adsorbed on the surface of the rotating rod 7, so that the butterfly plate 3 can be quickly opened and the movement speed can be improved. When it needs to be closed, the electricity to the surface of the rotating rod 7 is directly disconnected, and the fluid impacting the surface of the butterfly plate 3 can be quickly closed.

[0026] It should be noted that the utility model is a fast-acting eccentric butterfly valve. When in use, the butterfly plate 3 is initially in the position against the surface of the limit ring 2. At this time, the direction of the butterfly plate 3 is opposite to the direction of the fluid. At this time, the butterfly valve is in a closed state. When flow is required, the driving motor 9 is started or the wheel 11 is rotated. The rotation of its output shaft will drive the rotating rod 7 to rotate, which will drive the pull rope 8 to be wound around the surface of the rotating rod 7. The pull rope 8 will drive the butterfly plate 3 to the position close to the rotating rod 7, and the rotating rod 7 will be energized so that its surface has a large magnetism, and the butterfly plate 3 will be adsorbed on the surface of the rotating rod 7, so that the butterfly plate 3 can be quickly opened, thereby improving the movement speed. When it needs to be closed, the electricity to the surface of the rotating rod 7 is directly disconnected, and the fluid impacting the surface of the butterfly plate 3 can be quickly closed.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A fast-acting eccentric butterfly valve, comprising a valve body (1), characterized in that: A limit ring (2) is installed inside the valve body (1), and two butterfly plates (3) are installed inside the valve body (1). The surfaces of the two butterfly plates (3) are against the surface of the limit ring (2), and the two butterfly plates (3) are installed and connected by installing hinges (4). The surfaces of the two butterfly plates (3) are both installed with installation shafts (5), and the two installation shafts (5) are respectively located at the two ends of the butterfly plates (3). The two installation shafts (5) are concentric shafts, and the installation shafts (5) are movably installed inside the valve body (1). A tensioning component is installed inside the valve body (1) for driving the rotation of the installation shafts (5).

2. A fast-acting eccentric butterfly valve according to claim 1, characterized in that: The surfaces of the two installation shafts (5) are both fixedly sleeved with first bearings (6), and the first bearings (6) are embedded in the inner wall of the valve body (1).

3. A fast-acting eccentric butterfly valve according to claim 1, characterized in that: The stretching assembly comprises a rotating rod (7), the rotating rod (7) being located on a side away from the limiting ring (2), a pull rope (8) being fixedly mounted on the surface of the two butterfly plates (3), one end of the pull rope (8) being fixed on the surface of the rotating rod (7), one end of the rotating rod (7) extending to the outside of the valve body (1), a driving motor (9) being fixedly mounted on the surface of the valve body (1) via a mounting frame, and an output shaft of the driving motor (9) being fixed on the surface of the rotating rod (7).

4. A fast-acting eccentric butterfly valve according to claim 3, characterized in that: Second bearings (10) are fixedly mounted at both ends of the rotating rod (7), and the two second bearings (10) are embedded in the inner wall of the valve body (1). The other end of the rotating rod (7) extends to the outside of the valve body (1), and a rotating wheel (11) is mounted on the other end of the rotating rod (7).

5. A fast-acting eccentric butterfly valve according to claim 4, characterized in that: The rotating rod (7) is an electromagnetic rod, the interior of the butterfly plate (3) has magnetic attraction, and the distance between the rotating rod (7) and the butterfly plate (3) is less than the radius of the butterfly plate (3).

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