High-sealing single-plate butterfly valve for air pipe

Abstract

The high-sealing single-plate butterfly valve comprises a valve body, a valve plate is arranged in the valve body, a valve shaft is installed in the middle in the valve plate, hidden arc-shaped grooves are symmetrically formed in the side faces of the valve plate, arc-shaped moving rods are arranged in the hidden arc-shaped grooves, arc-shaped sealing strips are installed on the outer side faces of the arc-shaped moving rods, and the arc-shaped sealing strips make contact with the inner wall of the valve body. A plurality of cavities are formed in the valve plate, limiting blocks are slidably connected into the cavities, connecting rods are installed at the ends, close to the arc-shaped moving rods, of the limiting blocks, penetrate through the cavities and are fixedly connected with the arc-shaped moving rods, and first springs sleeve the outer surfaces of the connecting rods. The arc-shaped sealing strip makes contact with the inner wall of the valve body, the sealing effect is good, meanwhile, the arc-shaped moving rod pushes the arc-shaped sealing strip to abut against the inner wall of the valve body, the sealing effect is improved, when the valve plate is closed, the arc-shaped sealing strip can extrude and be attached to the arc-shaped matched sealing strip, and the sealing effect is further improved.

Description

Technical Field

[0001] The utility model relates to the field of air ducts, in particular to a high-sealing single-plate butterfly valve for air ducts. Background Art

[0002] In air duct systems, butterfly valves can control flow, isolate pipes, and regulate pressure. With the continuous development of modern industrial technology, the requirements for the sealing performance of air duct systems are becoming increasingly stringent, especially in applications where sealing performance is extremely demanding. Existing air duct butterfly valves primarily utilize rubber sealing rings. Although these rings exhibit strong sealing performance after being squeezed by external forces, they develop gaps after long-term wear and tear, reducing the sealing effect. Therefore, those skilled in the art have provided a high-sealing single-plate butterfly valve for air ducts to address the issues raised in the aforementioned background technology. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a high-sealing single-plate butterfly valve for air ducts, comprising a valve body, a valve plate arranged inside the valve body, a valve shaft installed in the middle of the valve plate, hidden arc grooves symmetrically provided on the side of the valve plate, an arc-shaped moving rod provided inside the hidden arc groove, an arc-shaped sealing strip installed on the outer side of the arc-shaped moving rod, and the arc-shaped sealing strip contacts the inner wall of the valve body, and a plurality of cavities are provided inside the valve plate;

[0004] A limit block is slidably connected inside the cavity, a connecting rod is installed near one end of the limit block near the arc-shaped moving rod, and the connecting rod passes through the cavity and is fixedly connected to the arc-shaped moving rod, and a spring is sleeved on the outer surface of the connecting rod;

[0005] A circular ring cavity is set inside the valve body, and one end of the valve shaft passes through the center of the circular ring cavity. The circular ring cavity is slidably connected to the circular pressure plate. Several springs are installed on the upper end of the circular pressure plate, and the springs are fixedly connected to the top of the circular ring cavity. A sealing ring is set inside the circular ring cavity, and the sealing ring is located below the circular pressure plate. Two arc-shaped matching sealing strips are installed on the inner wall of the valve body, and the arc-shaped matching sealing strips contact the arc-shaped sealing strips.

[0006] Preferably, a plurality of mounting holes are symmetrically provided on the side surface of the valve body.

[0007] Preferably, a control mechanism is installed on the upper end of the valve shaft, and the control mechanism is fixed to the upper end of the valve body.

[0008] Preferably, one end of the spring is fixedly connected to the inner wall of the hidden arc groove, and the other end of the spring is fixedly connected to the arc-shaped moving rod.

[0009] Preferably, the two arc-shaped matching sealing strips are respectively located on the front left side and the rear right side of the valve plate.

[0010] Technical effects and advantages of this utility model:

[0011] The utility model has a good sealing effect by contacting the inner wall of the valve body with the arc-shaped sealing strip. At the same time, the arc-shaped moving rod pushes the arc-shaped sealing strip against the inner wall of the valve body, thereby improving the sealing effect. At the same time, when the valve plate is closed, the arc-shaped sealing strip will squeeze and fit the arc-shaped matching sealing strip, thereby further improving the sealing effect. At the same time, the annular pressure plate is lowered to squeeze the sealing ring, so that the sealing ring is squeezed and deformed to fill the gap between the valve shaft and the valve body, thereby achieving a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of this application;

[0013] Figure 2 It is a structural diagram of the valve body of this application;

[0014] Figure 3 It is a structural diagram of the valve plate of this application;

[0015] Figure 4 It is a structural diagram of the circular ring cavity of the present application;

[0016] In the figure: 1. Valve body; 2. Mounting hole; 3. Valve plate; 4. Valve shaft; 5. Control mechanism; 6. Hidden arc groove; 7. Arc-shaped moving rod; 8. Arc-shaped sealing strip; 9. Cavity; 10. Limit block; 11. Connecting rod; 12. Spring 1; 13. Annular cavity; 14. Annular pressure plate; 15. Sealing ring; 16. Spring 2; 17. Arc-shaped matching sealing strip. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0018] See also Figures 1 to 4In this embodiment, a high-sealing single-plate butterfly valve for an air duct is provided, comprising a valve body 1, wherein a plurality of mounting holes 2 are symmetrically provided on the side of the valve body 1, a valve plate 3 is provided inside the valve body 1, a valve shaft 4 is installed in the middle of the valve plate 3, a control mechanism 5 is installed on the upper end of the valve shaft 4, and the control mechanism 5 is fixed to the upper end of the valve body 1, a hidden arc groove 6 is symmetrically provided on the side of the valve plate 3, an arc-shaped moving rod 7 is provided inside the hidden arc groove 6, an arc-shaped sealing strip 8 is installed on the outer side of the arc-shaped moving rod 7, and the arc-shaped sealing strip 8 contacts the inner wall of the valve body 1, a plurality of cavities 9 are provided inside the valve plate 3, a limit block 10 is slidably connected inside the cavity 9, a connecting rod 11 is installed near one end of the limit block 10 near the arc-shaped moving rod 7, and the connecting rod 11 passes through the cavity 9 and is fixedly connected to the arc-shaped moving rod 7, the connecting rod A spring 12 is sleeved on the outer surface of 11, one end of the spring 12 is fixedly connected to the inner wall of the hidden arc groove 6, and the other end of the spring 12 is fixedly connected to the arc-shaped moving rod 7. A circular ring cavity 13 is set inside the valve body 1, and one end of the valve shaft 4 passes through the center position of the circular ring cavity 13. The inside of the circular ring cavity 13 is slidably connected to the annular pressure plate 14, and a number of springs 2 16 are installed on the upper end of the annular pressure plate 14, and the spring 2 16 is fixedly connected to the top of the circular ring cavity 13. A sealing ring 15 is set inside the circular ring cavity 13, and the sealing ring 15 is located below the annular pressure plate 14. Two arc-shaped matching sealing strips 17 are installed on the inner wall of the valve body 1. The two arc-shaped matching sealing strips 17 are respectively located on the front left side of the valve plate 3 and the rear right side of the valve plate 3. The arc-shaped matching sealing strip 17 contacts the arc-shaped sealing strip 8.

[0019] The working principle of the present utility model is: the valve shaft 4 is driven to rotate by the control mechanism 5, and the valve shaft 4 drives the valve plate 3 to rotate and close inside the valve body 1, so that the side of the valve plate 3 contacts the inner wall of the valve body 1. At the same time, the arc-shaped sealing strip 8 contacts the inner wall of the valve body 1, and the sealing effect is good. At the same time, the arc-shaped moving rod 7 is pushed outward by the spring 12, and the arc-shaped moving rod 7 pushes the arc-shaped sealing strip 8 against the inner wall of the valve body 1, thereby improving the sealing effect. At the same time, when the valve plate 3 is closed, the arc-shaped sealing strip 8 will squeeze and fit the arc-shaped matching sealing strip 17, thereby further improving the sealing effect. At the same time, the annular pressure plate 14 is pushed down by the spring 2 16, and the annular pressure plate 14 descends to squeeze the sealing ring 15, so that the sealing ring 15 is squeezed and deformed to fill the gap between the valve shaft 4 and the valve body 1, and the sealing effect is good.

[0020] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A high-seal single-plate butterfly valve for an air duct, comprising a valve body (1), characterized in that: A valve plate (3) is arranged inside the valve body (1), a valve shaft (4) is installed in the middle of the valve plate (3), a hidden arc groove (6) is symmetrically provided on the side of the valve plate (3), an arc moving rod (7) is arranged inside the hidden arc groove (6), an arc sealing strip (8) is installed on the outer side of the arc moving rod (7), and the arc sealing strip (8) contacts the inner wall of the valve body (1), and a plurality of cavities (9) are arranged inside the valve plate (3); The cavity (9) is internally slidably connected to a limit block (10), a connecting rod (11) is installed near one end of the limit block (10) close to the arc-shaped moving rod (7), and the connecting rod (11) passes through the cavity (9) and is fixedly connected to the arc-shaped moving rod (7), and a spring (12) is sleeved on the outer surface of the connecting rod (11); An annular cavity (13) is arranged inside the valve body (1), and one end of the valve shaft (4) passes through the center of the annular cavity (13). The annular cavity (13) is slidably connected to an annular clamping plate (14). A plurality of springs (16) are installed at the upper end of the annular clamping plate (14), and the springs (16) are fixedly connected to the top of the annular cavity (13). A sealing ring (15) is arranged inside the annular cavity (13), and the sealing ring (15) is located below the annular clamping plate (14). Two arc-shaped matching sealing strips (17) are installed on the inner wall of the valve body (1), and the arc-shaped matching sealing strips (17) contact the arc-shaped sealing strip (8).

2. A high-seal single-plate butterfly valve for air duct according to claim 1, characterized in that: A plurality of mounting holes (2) are symmetrically provided on the side surface of the valve body (1).

3. A high-seal single-plate butterfly valve for air duct according to claim 1, characterized in that: A control mechanism (5) is installed on the upper end of the valve shaft (4), and the control mechanism (5) is fixed on the upper end of the valve body (1).

4. A high-seal single-plate butterfly valve for air duct according to claim 1, characterized in that: One end of the spring (12) is fixedly connected to the inner wall of the hidden arc groove (6), and the other end of the spring (12) is fixedly connected to the arc moving rod (7).

5. The high-sealing single-plate butterfly valve for air duct according to claim 1, characterized in that: The two arc-shaped matching sealing strips (17) are respectively located on the front left side of the valve plate (3) and the rear right side of the valve plate (3).

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