A variable air volume butterfly valve

Abstract

The present invention belongs to the technical field of butterfly valve equipment, and specifically discloses a variable air volume butterfly valve, which includes a butterfly valve body. The butterfly valve body is of a cuboid structure as a whole. The front part of the butterfly valve body is provided with a flow cavity. A nozzle fixing pipe is installed in the flow cavity, and nozzles are symmetrically installed in the nozzle fixing pipe. Air nozzles are symmetrically arranged at the top of the flow cavity, and the air nozzles are connected to the nozzles. The air nozzles are connected by an air pipe and an air nozzle tee. The rear part of the butterfly valve body is provided with an adjustment cavity. A valve disc is arranged at the lower part of the middle part of the adjustment cavity. Valve rods are symmetrically arranged on both sides of the adjustment cavity. The valve disc is connected to the valve rods, and the valve rods are installed on the rotating device of the actuator. The actuator is fixed on the side wall of the adjustment cavity through an actuator mounting bracket. The present invention can parallel multiple nozzles according to the size of the valve. Each nozzle is equipped with an air nozzle. The air nozzles take pressure in each flow cavity and finally converge into a single air pipe and are connected to the control main board, and the measured pressure is more accurate, so as to obtain high-precision flow data.

Description

Technical Field

[0001] The present invention relates to the field of butterfly valve equipment, and specifically to a variable air volume butterfly valve. Background Technique

[0002] The existing technical solution at present is a common variable air volume butterfly valve, that is, a cross-shaped or rod-shaped Pitot tube flow sensor is used for its own flow feedback. This type of flow measurement has poor measurement accuracy at low wind speeds, resulting in poor control accuracy of the butterfly valve and unable to meet the requirements of high response speed and high precision control in the laboratory environment.

[0003] The control box of the common variable air volume butterfly valve is of a cuboid structure and requires a large space when opened, and the opening angle is limited in places where the air ducts are relatively dense. A variable air volume butterfly valve is now designed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a variable air volume butterfly valve to solve the problems of low measurement accuracy, slow response speed, and inaccurate data of the flow sensor of the traditional butterfly valve proposed in the above background technique; at the same time, the valve control box occupies a large amount of space and does not come with flanges at the factory, which is not convenient for installation.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A variable air volume butterfly valve includes a butterfly valve body, a flow chamber, and an adjustment chamber. The butterfly valve body is of an overall cuboid structure. The front part of the butterfly valve body is provided as a flow chamber. A nozzle fixing pipe is installed in the flow chamber. Nozzles are symmetrically installed in the nozzle fixing pipe. Air nozzles are symmetrically arranged at the top of the flow chamber. The air nozzles are connected to the nozzles. The air nozzles are connected by an air pipe and an air nozzle tee. The rear part of the butterfly valve body is provided with an adjustment chamber. A valve plate is arranged at the lower part of the middle of the adjustment chamber. The area of the valve plate is the same as the rectangular area of the inner diameter cross-section of the butterfly valve body at this place. Valve rods are symmetrically arranged on both sides of the adjustment chamber. The valve plate is connected to the valve rods. The valve rods are installed on the rotating device of the actuator. The actuator is fixed on the side wall of the adjustment chamber through an actuator mounting bracket. A control box is arranged on the side wall of the butterfly valve body. The air nozzle tee is connected to the control box through an air pipe. The actuator is connected to the control box.

[0006] Preferably, a number of first air holes and a number of second air holes are provided in the nozzles. The first air holes are perpendicular to the butterfly valve body, and the second air holes are parallel to the butterfly valve body.

[0007] Preferably, the air nozzles are installed on one side inside the nozzles.

[0008] Preferably, mounting flanges are symmetrically arranged on both the front and rear sides of the butterfly valve body.

[0009] Preferably, the cross-section of the valve plate is rectangular, and the valve plate is a split multi-leaf structure.

[0010] Preferably, the rotation angle of the rotation device is 0-90 degrees.

[0011] Preferably, a control main board is arranged inside the control box, and the air pipe and the actuator are connected to the control main board.

[0012] Preferably, the control box has a square structure, the control box lid is inclinedly arranged on the control box, and a buckle is arranged at the front opening of the control box lid.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention belongs to the technical field of butterfly valve equipment, and specifically discloses a variable air volume butterfly valve. By arranging a plurality of nozzles in parallel on the butterfly valve body, each nozzle is equipped with an air nozzle, and the air nozzle takes pressure in each flow cavity and finally converges into an air pipe to be connected to the control main board, so that the measured pressure is more accurate, and high-precision flow data can be obtained; at the same time, the originally rotationally opened control box is set to be opened by an inclined buckle plate. At the same time, the inclined buckle plate opening avoids the space required for the original rotation, and the control box can be better installed to control the valve to control the flow; the structure of the present invention is simple, the operation is convenient, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is a schematic diagram of the air nozzle tee of the present invention;

[0016] Figure 3 is a schematic diagram of the nozzle fixing pipe of the present invention;

[0017] Figure 4 is a schematic diagram of the nozzle of the present invention;

[0018] In the figure: 1, butterfly valve body; 2, flow cavity; 3, adjustment cavity; 4, nozzle fixing pipe; 5, nozzle; 6, air nozzle; 7, air pipe; 8, air nozzle tee; 9, valve disc; 10, valve stem; 11, actuator; 12, rotation device; 13, mounting bracket; 14, control box; 15, first air hole; 16, second air hole; 17, mounting flange; 18, control box lid; 19, buckle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0021] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution: a variable air volume butterfly valve, including a butterfly valve body 1, a flow chamber 2 and an adjustment chamber 3. The butterfly valve body 1 is of an overall cuboid structure. The front part of the butterfly valve body 1 is set as the flow chamber 2. A nozzle fixing pipe 4 is installed in the flow chamber 2. Nozzles 5 are symmetrically installed in the nozzle fixing pipe 4. Air nozzles 6 are symmetrically arranged at the top of the flow chamber 2. The air nozzles 6 are connected to the nozzles 5. The air nozzles 6 are connected by an air pipe 7 and an air nozzle tee 8. The rear part of the butterfly valve body 1 is provided with an adjustment chamber 3. A valve disc 9 is arranged at the lower middle part of the adjustment chamber 3. The area of the valve disc 9 is the same as the rectangular area of the inner diameter section of the butterfly valve body 1 at this place. Valve rods 10 are symmetrically arranged on both sides of the adjustment chamber 3. The valve disc 9 is connected to the valve rods 10. The valve rods 10 are installed on the rotating device 12 of the actuator 11. The actuator 11 is fixed on the side wall of the adjustment chamber 3 through an actuator mounting bracket 13. A control box 14 is arranged on the side wall of the butterfly valve body 1. The air nozzle tee 8 is connected to the control box 14 through the air pipe 7. The actuator 11 is connected to the control box 14.

[0023] Furthermore, a number of first air holes 15 and a number of second air holes 16 are arranged in the nozzle 5. The first air holes 15 are perpendicular to the butterfly valve body 1, and the second air holes 16 are parallel to the butterfly valve body 1. According to different models of the valve, multiple nozzles 5 are used for flow measurement. Each nozzle 5 is provided with an air nozzle 6 to obtain pressure data. For the first air holes perpendicular to the valve body and the second air holes parallel to the valve body, when gas enters the first air holes and the second air holes, pressure is formed. The two air ports of the air nozzle receive the pressures of the first air holes and the second air holes respectively, and transmit the pressures to the control main board. After the control main board measures the pressure values, the pipeline flow velocity can be obtained through calculation.

[0024] Further, the air nozzle is installed on one side inside the nozzle.

[0025] Further, mounting flanges 17 are symmetrically arranged on the front and rear sides of the butterfly valve body 1, facilitating the installation of the butterfly valve body.

[0026] Further, the cross-section of the valve disc 9 is rectangular, and the valve disc 9 is a split multi-leaf structure.

[0027] Further, the rotation angle of the rotating device 12 is 0 - 90 degrees.

[0028] Further, a control main board is arranged inside the control box 14, and the air pipe 7 and the actuator 11 are connected to the control main board.

[0029] Further, the control box 14 is of a square structure, and the control box lid 18 is inclinedly arranged on the control box 14. A buckle 19 is provided at the front opening of the control box lid 18, setting the originally rotationally opened control box to be opened by an inclined buckle. At the same time, the inclined buckle opening avoids the space required for the original rotation, facilitating the installation of the control box better.

[0030] Working principle: The present invention relates to a variable air volume butterfly valve. When in use, the mounting flanges 17 arranged on the front and rear sides of the butterfly valve body 1 can effectively facilitate the installation and disassembly of the butterfly valve body 1. After the butterfly valve body 1 is installed, gas passes through the nozzle 5 in the nozzle fixed pipe 4 of the flow chamber 2. The nozzles 5 are arranged in parallel, and a first air hole 15 and a second air hole 16 are provided in the nozzle 5. The first air hole 15 is perpendicular to the butterfly valve body 1, and the second air hole 16 is parallel to the butterfly valve body 1. Gas generates pressure when passing through the nozzle 5. The first air hole 15 and the second air hole 16 transfer the gas through the air nozzle 6 arranged on one side inside the nozzle 5, providing a stable pressure state. The air nozzle 6 transfers the gas to the control box 14 through the air pipe 7 and the air nozzle tee 8. The control main board measures and calculates the gas pressure to obtain the pipeline flow velocity. Multiple nozzles 5 can be connected in parallel according to the size of the valve, and each nozzle 5 is equipped with an air nozzle 6. The air nozzle 6 takes pressure in each nozzle 5 and finally converges into one air pipe 7 to be connected to the control main board, making the measured pressure more accurate, thereby obtaining high-precision flow data and providing accurate flow information. The control main board can control the actuator 11 to work. The actuator 11 controls the rotating device 12 to work. The rotating device 12 can drive the valve stem 10 to rotate by 0 - 90 degrees. The rotation of the valve stem 10 drives the valve disc 9 arranged in the adjustment chamber 2 to rotate, thereby adjusting the gas flow through the butterfly valve body 1, facilitating the adjustment. The provided control box lid 18 is inclinedly arranged, setting the originally rotationally opened control box to be opened by an inclined buckle. At the same time, the inclined buckle opening avoids the space required for the original rotation, facilitating the installation of the control box better.

[0031] It should be noted that the entire device is controlled through the control box and the control main board. Since the devices matched with the control box and the control main board are common devices and belong to the existing common technology, the electrical connection relationship and the specific circuit structure thereof will not be elaborated herein.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable air volume butterfly valve, characterized in that: It includes a butterfly valve body (1), a flow chamber (2) and an adjustment chamber (3). The butterfly valve body (1) is of an overall cuboid structure. The front part of the butterfly valve body (1) is provided as the flow chamber (2). A nozzle fixing pipe (4) is installed in the flow chamber (2). Nozzles (5) are symmetrically installed in the nozzle fixing pipe (4). Air nozzles (6) are symmetrically arranged at the top of the flow chamber (2). The air nozzles (6) are connected to the nozzles (5). The air nozzles (6) are connected through an air pipe (7) and an air nozzle tee (8). The rear part of the butterfly valve body (1) is provided with the adjustment chamber (3). A valve disc (9) is arranged at the lower middle part of the adjustment chamber (3). The area of the valve disc (9) is the same as the rectangular area of the inner diameter section of the butterfly valve body (1) at this position. Valve rods (10) are symmetrically arranged on both sides of the adjustment chamber (3). The valve disc (9) is connected to the valve rods (10). The valve rods (10) are installed on the rotating device (12) of the actuator (11). The actuator (11) is fixed to the side wall of the adjustment chamber (3) through an actuator mounting bracket (13). A control box (14) is arranged on the side wall of the butterfly valve body (1). The air nozzle tee (8) is connected to the control box (14) through the air pipe (7). The actuator (11) is connected to the control box (14). A number of first air holes (15) and a number of second air holes (16) are arranged in the nozzles (5). The first air holes (15) are perpendicular to the butterfly valve body (1). The second air holes (16) are parallel to the butterfly valve body (1). The cross-section of the valve disc (9) is rectangular. The valve disc (9) is a split multi-leaf structure.

2. The variable air volume butterfly valve according to claim 1, characterized in that: The air nozzle (6) is installed on one side inside the nozzle (5).

3. The variable air volume butterfly valve according to claim 1, characterized in that: Mounting flanges (17) are symmetrically arranged on the front and rear sides of the butterfly valve body (1).

4. The variable air volume butterfly valve according to claim 1, characterized in that: The rotation angle of the rotating device (12) is 0 - 90 degrees.

5. The variable air volume butterfly valve according to claim 1, wherein: A control main board is arranged inside the control box (14). The air pipe (7) and the actuator (11) are connected to the control main board.

6. The variable air volume butterfly valve according to claim 1, characterized in that: The control box (14) is of a square structure. A control box cover (18) is inclinedly arranged on the control box (14). A buckle (19) is arranged at the front opening of the control box cover (18).

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