Multi-vane butterfly valve air door mechanism

Abstract

The utility model provides an air door mechanism of a multi-vane butterfly valve. The air door mechanism comprises a valve body; the multiple rotating shafts are parallel to one another, the multiple rotating shafts are located in the same cross section in the fluid direction, and the multiple rotating shafts penetrate through the valve body; each rotary shaft drives one rotary vane, the rotary shafts are located at the longest positions of the rotary vanes, and when the rotary vanes are closed, the cavity in the valve body is closed; the motor drives one rotating shaft in the multiple rotating shafts to rotate, the tail end of each rotating shaft is connected with one end of the corresponding connecting shaft rod, the other end of each connecting shaft rod is connected with the main connecting rod, and the motor drives all the rotating shafts to rotate together through the connecting shaft rods and the main connecting rod when driving one rotating shaft to rotate. According to the air door mechanism of the multi-rotary-vane butterfly valve, due to the fact that the multi-rotary-vane design is adopted, the occupied space is smaller when the air door mechanism is used, the air door mechanism is more flexible and convenient to use, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a multi-bladed butterfly valve damper mechanism. Background Technology

[0002] Currently, mines widely use counter-rotating axial flow fans for ventilation. When the fan needs maintenance or to be shut down without interrupting ventilation, dampers need to be opened or closed. Butterfly valves are a common type, opening and closing the valve through the rotation of the valve disc. Because of this, butterfly valves require a large space to rotate. For example, when the valve is fully open, the valve disc is perpendicular to the valve body cross-section, thus occupying a space roughly the diameter of the area before and after the pivot point.

[0003] However, many newly built or renovated mines have limited space, or due to certain special constraints, they can only be built or renovated within the limited space of their original location.

[0004] This utility model aims to provide a multi-bladed butterfly valve damper mechanism that occupies less space and is more convenient to use. Utility Model Content

[0005] This utility model provides a multi-bladed butterfly valve damper mechanism that occupies less space and is more convenient to use.

[0006] This utility model provides a multi-blade butterfly valve damper mechanism, comprising: a valve body; multiple rotating shafts, which are parallel to each other and located in the same cross section in the fluid direction, passing through the valve body; multiple blades, each rotating shaft driving one blade, the rotating shaft being located at the longest position of its blade, the multiple blades closing the cavity inside the valve body when closed; and a motor driving one of the multiple rotating shafts to rotate, the end of each rotating shaft being connected to one end of a corresponding connecting rod, the other end of the connecting rod being connected to a main connecting rod, the motor driving one rotating shaft to rotate, and all rotating shafts rotating together through the connecting rod and the main connecting rod when driving one rotating shaft to rotate.

[0007] The valve body is located on the bearing housing.

[0008] A sealing strip is provided on the edge of the blade.

[0009] Furthermore, the plurality of rotating shafts includes a first rotating shaft, a second rotating shaft, and a third rotating shaft; the plurality of blades includes a first blade, a second blade, and a third blade; the second blade is located between the first blade and the third blade, the second rotating shaft is located at the diameter of the second blade, the first rotating shaft is located at the chord of the first blade, and the third rotating shaft is located at the chord of the third blade;

[0010] The end of the first rotating shaft is connected to one end of the first connecting rod, the end of the second rotating shaft is connected to one end of the second connecting rod, and the end of the third rotating shaft is connected to one end of the third connecting rod. The other ends of the first, second, and third connecting rods are connected to a main connecting rod. The motor drives the second rotating shaft to rotate and, through the main connecting rod, drives the first and third rotating shafts to rotate together.

[0011] The first, second, and third vanes close the cavity inside the valve body when closed.

[0012] Sealing strips are provided on the edges of the first, second, and third rotary blades.

[0013] The multi-blade butterfly valve damper mechanism provided by this utility model occupies less space and is more flexible and convenient to use, thus extending its service life. Attached Figure Description

[0014] Figure 1 The diagram shown is a structural schematic of the multi-bladed butterfly valve damper mechanism according to an embodiment of the present invention.

[0015] Figure 2 The diagram shown is a side view of the multi-bladed butterfly valve damper mechanism according to an embodiment of the present invention.

[0016] Figure 3 The diagram shown is a structural schematic of the multi-bladed butterfly valve damper mechanism according to an embodiment of the present invention.

[0017] Figure label:

[0018] 100: Multi-bladed butterfly valve damper mechanism;

[0019] 1: Valve body; 21: First vane; 211: First rotating shaft; 212: First connecting rod; 22: Second vane; 221: Second rotating shaft; 222: Second connecting rod; 23: Third vane; 231: Third rotating shaft; 232: Third connecting rod; 3: Motor; 4: Bearing housing; 5: Sealing strip; 6: Main connecting rod. Detailed Implementation

[0020] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0021] Figure 1 The diagram shown is a structural schematic of the multi-bladed butterfly valve damper mechanism according to an embodiment of the present invention. Figure 2 The diagram shown is a side view of the multi-bladed butterfly valve damper mechanism according to an embodiment of the present invention. Figure 3The diagram shown is a structural schematic of the multi-bladed butterfly valve damper mechanism according to an embodiment of the present invention.

[0022] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a multi-bladed butterfly valve damper mechanism 100, including: a valve body 1; a first rotating shaft 211, a second rotating shaft 221, and a third rotating shaft 231, the first rotating shaft 211, the second rotating shaft 221, and the third rotating shaft 231 being parallel to each other and located in the same cross section in the fluid direction, the first rotating shaft 211, the second rotating shaft 221, and the third rotating shaft 231 passing through the valve body 1; a first swivel 21, a second swivel 22, and a third swivel 23, each rotating shaft driving one swivel, the rotating shaft being located at the longest position of the swivel, the second swivel 22 being located between the first swivel 21 and the third swivel 23, the second rotating shaft 221 being located at the diameter position of the second swivel 22, the first rotating shaft 211 being located at the chord position of the first swivel 21, and the third rotating shaft 231 being located at the third swivel. At the position of the chord 23, the first rotary vane 21, the second rotary vane 22, and the third rotary vane 23 close the cavity inside the valve body 1 when closed; the motor 3 drives one of the multiple rotary shafts to rotate, the end of each rotary shaft is connected to one end of a corresponding connecting rod, and the other end of the connecting rod is connected to the main connecting rod. When the motor drives one rotary shaft to rotate, it drives all the rotary shafts to rotate together through the connecting rod and the main connecting rod. The end of the first rotary shaft 211 is connected to one end of the first connecting rod 212, the end of the second rotary shaft 221 is connected to one end of the second connecting rod 222, and the end of the third rotary shaft 231 is connected to one end of the third connecting rod 232. The other ends of the first connecting rod 212, the second connecting rod 222, and the third connecting rod 232 are connected to the main connecting rod 6. The motor 3 drives the second rotary shaft 221 to rotate, and drives the first rotary shaft 211 and the third rotary shaft 231 to rotate together through the main connecting rod 6.

[0023] Driven by motor 3, for example, the output end of motor 3 is equipped with gears, and the surface of the second rotating shaft 221 is also equipped with gears. Therefore, when motor 3 rotates, it drives the second rotating shaft 221 to rotate, and through the main connecting rod and the connecting shaft rod, it drives the first rotating shaft 211 and the third rotating shaft 231 to rotate together, thereby realizing the opening and closing of the damper.

[0024] Reference Figure 3Ordinary butterfly valves have a single swivel blade, so their range of motion is limited to the diameter D of the valve body cross-section, occupying a large space. The butterfly valve damper of this utility model embodiment has a three-swivel blade, which greatly reduces the required range of motion. The range of motion is limited to the distance d1 or d2 of the valve body cross-section, and d1 or d2 is less than D. Therefore, the butterfly valve damper of this utility model embodiment occupies a much smaller space, saving space and making it suitable for applications in space-constrained situations.

[0025] In a typical single-blade butterfly valve, if a blockage occurs at any point on the single blade (e.g., due to dirt or rust), a large force must be applied to the rotating shaft to rotate the entire single blade. This stress concentration on the single rotating shaft leads to significant friction, actually accelerating wear on both the rotating shaft and the blade, necessitating replacement. In the multi-blade butterfly valve damper of this embodiment, a multi-blade design is used. The contact area between each blade and the valve body is reduced, dispersing stress and preventing stress concentration on a single rotating shaft. This facilitates easy start-up and rotation. Even if stress concentration occurs on the connecting rod or main connecting rod, their external location makes maintenance easy.

[0026] Sealing strips are provided on the edges of the first, second, and third swivels. In ordinary three-swivel butterfly valves, sealing strips are also provided on the outer periphery of the single swivel, but because the sealing strip is arc-shaped, it is subject to bending stress, resulting in a shorter service life. In the three-swivel butterfly valve damper of this utility model embodiment, the swivel shape is bow-shaped or a combination of bow shapes. The sealing strip of the straight part experiences less wear, while the sealing strip of the arc-shaped part has a shorter length, reducing bending stress and extending its service life. At the same time, the shorter length also makes it easier to maintain.

[0027] The multi-blade butterfly valve damper mechanism provided by this utility model occupies less space and is more flexible and convenient to use, thus extending its service life.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" and their orientation or positional relationships are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A multi-bladed butterfly valve damper mechanism, characterized in that, include: Valve body; Multiple rotating shafts, which are parallel to each other, are located in the same cross section in the fluid direction, and pass through the valve body; Multiple blades, each rotating shaft drives one blade, the rotating shaft is located at the longest position of the blade, the multiple blades close the cavity in the valve body when closed; The motor drives one of the plurality of rotating shafts to rotate. The end of each rotating shaft is connected to one end of a corresponding connecting rod, and the other end of the connecting rod is connected to a main connecting rod. When the motor drives one rotating shaft to rotate, it drives all rotating shafts to rotate together through the connecting rod and the main connecting rod. The plurality of rotating shafts include a first rotating shaft, a second rotating shaft, and a third rotating shaft; the plurality of rotating blades include a first rotating blade, a second rotating blade, and a third rotating blade; the second rotating blade is located between the first rotating blade and the third rotating blade, the second rotating shaft is located at the diameter of the second rotating blade, the first rotating shaft is located at the chord of the first rotating blade, and the third rotating shaft is located at the chord of the third rotating blade; The end of the first rotating shaft is connected to one end of the first connecting rod, the end of the second rotating shaft is connected to one end of the second connecting rod, and the end of the third rotating shaft is connected to one end of the third connecting rod. The other ends of the first, second, and third connecting rods are connected to a main connecting rod. The motor drives the second rotating shaft to rotate and, through the main connecting rod, drives the first and third rotating shafts to rotate together. When closed, the first, second, and third swivels close the cavity inside the valve body. When closed, the first and second swivels engage with each other, and the second and third swivels engage with each other. Sealing strips are provided on the edges of the first, second, and third blades.

2. The multi-bladed butterfly valve damper mechanism according to claim 1, characterized in that, The valve body is located on the bearing housing.

3. The multi-bladed butterfly valve damper mechanism according to claim 1, characterized in that, A sealing strip is provided on the edge of the blade.

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