Variable air volume venturi butterfly valve

Abstract

The utility model discloses a variable air volume venturi butterfly valve which comprises a venturi tube, a valve plate, a first flow sensor, a second flow sensor, a driver and a central controller. The valve plate is arranged at the front end of the Venturi tube and fixed to the valve plate rotating shaft, the valve plate rotating shaft is arranged on the tube wall of the front end of the Venturi tube, and the air supply and exhaust amount of the Venturi butterfly valve can be controlled by adjusting the angle of the valve plate. The first flow sensor and the second flow sensor are arranged front and back in the axial direction of the Venturi butterfly valve. The driver and the central controller are fixedly arranged on the outer side of the Venturi tube, and the output end of the driver is in transmission connection with the valve plate rotating shaft; the central controller is respectively connected with the driver, the first flow sensor and the second flow sensor; the operation of the driver is controlled by the central controller; the central controller obtains real-time detection data of the first flow sensor and the second flow sensor. The variable air volume venturi butterfly valve is unique in structure, more sensitive in response, more accurate in control precision, higher in efficiency and more energy-saving.

Description

Technical Field

[0001] The utility model relates to ventilation equipment, in particular to an air supply and exhaust device. Background Art

[0002] Variable air volume Venturi valves are mostly used for air supply and exhaust (air supply and exhaust) in various places and fume hood exhaust, etc. Its characteristics are short response time and high control accuracy. The Venturi valve is mainly composed of a Venturi tube, a valve, an actuator and a control part.

[0003] Existing variable air volume Venturi valves all include a central valve body and are divided into push rod type Venturi valves and angle actuator type Venturi valves. Existing variable air volume Venturi valves generally have problems such as complex structure and low efficiency. In particular, push rod type Venturi valves may cause overload of the push rod motor due to long-term continuous operation, leading to overheating, actuator failure, and valve loss of control function. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a variable air volume Venturi butterfly valve with unique structure, more sensitive response, higher control accuracy, more energy saving and higher efficiency.

[0005] In order to solve this technical problem, the technical solution adopted by the utility model is as follows:

[0006] A variable air volume Venturi butterfly valve, comprising a Venturi tube, wherein the rear end of the Venturi tube is an air inlet end, and the front end is an air outlet end; further comprising a valve plate, a first flow sensor, a second flow sensor, a driver and a central controller;

[0007] The valve plate is arranged at the front end of the Venturi tube, the valve plate is fixedly connected to the valve plate rotating shaft, the valve plate rotating shaft is rotatably arranged on the front end tube wall of the Venturi tube, and the air supply and exhaust volume of the Venturi butterfly valve can be controlled by adjusting the rotation angle of the valve plate;

[0008] The first flow sensor and the second flow sensor are arranged front and back along the axial direction of the Venturi butterfly valve;

[0009] The driver and the central controller are fixedly arranged on the outside of the venturi tube, and the output end of the driver is drivingly connected to the valve plate rotating shaft; the central controller is respectively connected to the driver, the first flow sensor, and the second flow sensor;

[0010] The central controller controls the operation of the driver; and the central controller obtains real-time detection data of the first flow sensor and the second flow sensor.

[0011] Furthermore, the central controller obtains the wind pressure detected in real time by the first flow sensor and the second flow sensor, and calculates the real-time air volume value by the wind pressure difference between the two; sets a set air volume value, and when the real-time air volume value is greater than the set air volume value, controls the driver to rotate the valve plate to reduce the ventilation volume at the valve plate; when the real-time air volume value is less than the set air volume value, controls the driver to rotate the valve plate to increase the ventilation volume at the valve plate.

[0012] Furthermore, the set air volume value is set by the operator as one or more as needed.

[0013] Furthermore, the first flow sensor is arranged at the straight tube at the rear end of the Venturi tube.

[0014] Furthermore, the second flow sensor is arranged at the smallest diameter in the middle of the Venturi tube.

[0015] Furthermore, the driver and the central controller are both fixedly arranged in a control box, and the control box is fixedly arranged on the outer wall of the venturi tube.

[0016] The variable air volume Venturi butterfly valve of the utility model uniquely uses a valve plate as a flow control component in the Venturi valve, and uses two flow sensors, a central controller and a driver arranged at the front and back to realize intelligent real-time control.

[0017] Specifically, the flow sensor can detect the wind pressure difference at the specified position in real time to obtain the air volume value. When the central controller determines that the air volume is greater than the set air volume value, it will issue a command to adjust the valve down, and the driver will drive the valve plate shaft to rotate to adjust the valve channel down; when the air volume is less than the set air volume value, it will issue a command to adjust the valve up, and the driver will drive the valve plate shaft to rotate to adjust the valve channel up. In this way, under this real-time intelligent dynamic control, the supply and exhaust air volume can be relatively stable and close to the set air volume value, thereby achieving more stable, more sensitive, and more precise air volume control of the Venturi butterfly valve, and such a Venturi butterfly valve is more energy-saving and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 It is one of the structural schematic diagrams of the variable air volume Venturi butterfly valve of the utility model.

[0020] Figure 2 This is the second structural schematic diagram of the variable air volume Venturi butterfly valve of the utility model.

[0021] In the figure:

[0022] 1. Venturi tube 101, at the rear end of the straight tube of the Venturi tube

[0023] 102. The smallest diameter in the middle of the Venturi tube 2. Valve plate

[0024] 3. First flow sensor 4. Second flow sensor

[0025] 5. Driver 6. Central controller

[0026] 7. Valve shaft 8. Control box DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0028] Figure 1 , Figure 2 A variable air volume Venturi butterfly valve is shown, comprising a Venturi tube 1, the rear end of which is an air inlet end and the front end is an air outlet end; it also comprises a valve plate 2, a first flow sensor 3, a second flow sensor 4, a driver 5 and a central controller 6.

[0029] The valve plate 2 is arranged at the front end of the Venturi tube 1, and the valve plate 2 is fixedly connected to the valve plate rotating shaft 7. The valve plate rotating shaft 7 is rotatably arranged on the front end tube wall of the Venturi tube 1. The supply and exhaust air volume of the Venturi butterfly valve can be controlled by adjusting the rotation angle of the valve plate 2.

[0030] The first flow sensor 3 is arranged at the rear end straight tube 101 of the Venturi tube 1 , and the second flow sensor 4 is arranged at the minimum diameter 102 in the middle of the Venturi tube 1 .

[0031] The driver 5 and the central controller 6 are fixedly arranged on the outside of the venturi tube 1, and the output end of the driver 5 is drivingly connected to the valve plate shaft 7; the central controller 6 is connected to the driver 5, the first flow sensor 3, and the second flow sensor 4 respectively.

[0032] Furthermore, in order to control the working environment of some devices, we fix the driver 5 and the central controller 6 in a control box 8 , and the control box 8 is fixed on the outer wall of the venturi tube 1 .

[0033] The central controller 6 controls the operation of the driver 5 ; the central controller 6 obtains the real-time detection data of the first flow sensor 3 and the second flow sensor 4 .

[0034] Specifically, the central controller 6 obtains the wind pressure detected by the first flow sensor 3 and the second flow sensor 4 in real time, and calculates the real-time air volume value by the wind pressure difference between the two; sets the set air volume value, and when the real-time air volume value is greater than the set air volume value, controls the driver 5 to rotate the valve plate 2 to reduce the ventilation at the valve plate. When the real-time air volume value is less than the set air volume value, controls the driver 5 to rotate the valve plate 2 to increase the ventilation at the valve plate. The operator sets one or more set air volume values ​​as needed.

[0035] The first flow sensor 3 is arranged at the straight tube 101 at the rear end of the venturi tube, and the second flow sensor 4 is arranged at the minimum diameter 102 in the middle of the venturi tube. This position setting of the flow sensor makes the detected wind pressure more stable and accurate, because the wind pressure change before and after the sensor is relatively minimal. Of course, due to special requirements of design or demand, the positions of the first flow sensor 3 and the second flow sensor 4 can also be slightly adjusted, as long as the first flow sensor 3 and the second flow sensor 4 are arranged at a certain distance along the axial direction of the venturi butterfly valve, the central controller 6 can calculate the real-time air volume through the wind pressure difference detected by the first flow sensor 3 and the second flow sensor 4 in real time.

[0036] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A variable air volume Venturi butterfly valve, comprising a Venturi tube, wherein the rear end of the Venturi tube is an air inlet end and the front end is an air outlet end; characterized in that: It also includes a valve plate, a first flow sensor, a second flow sensor, a driver and a central controller; The valve plate is arranged at the front end of the Venturi tube, the valve plate is fixedly connected to the valve plate rotating shaft, the valve plate rotating shaft is rotatably arranged on the front end tube wall of the Venturi tube, and the air supply and exhaust volume of the Venturi butterfly valve can be controlled by adjusting the rotation angle of the valve plate; The first flow sensor and the second flow sensor are arranged front and back along the axial direction of the Venturi butterfly valve; The driver and the central controller are fixedly arranged on the outside of the venturi tube, and the output end of the driver is drivingly connected to the valve plate rotating shaft; the central controller is respectively connected to the driver, the first flow sensor, and the second flow sensor; The central controller controls the operation of the driver; and the central controller obtains real-time detection data of the first flow sensor and the second flow sensor.

2. The butterfly valve according to claim 1, characterized in that: The central controller obtains the wind pressure detected in real time by the first flow sensor and the second flow sensor, and calculates the real-time air volume value through the wind pressure difference between the two; sets a set air volume value, and when the real-time air volume value is greater than the set air volume value, controls the driver to rotate the valve plate to reduce the ventilation volume at the valve plate; when the real-time air volume value is less than the set air volume value, controls the driver to rotate the valve plate to increase the ventilation volume at the valve plate.

3. The butterfly valve according to claim 2, characterized in that: The operator can set one or more air volume settings as required.

4. The butterfly valve according to any one of claims 1 to 3, characterized in that: The first flow sensor is arranged at the straight tube at the rear end of the venturi tube.

5. The butterfly valve according to claim 4, characterized in that: The second flow sensor is arranged at the smallest diameter in the middle of the venturi tube.

6. The butterfly valve according to any one of claims 1 to 3, characterized in that: The driver and the central controller are both fixedly arranged in a control box, and the control box is fixedly arranged on the outer wall of the venturi tube.

Images