Remote control system for air knife fan

Abstract

The utility model relates to an air knife fan remote control system which comprises an air knife device, the air knife device is provided with an air inlet pipe, an inlet of the air inlet pipe is connected with a fan, the fan is a frequency conversion fan, an input end of the frequency conversion fan is provided with a frequency converter, the frequency converter is used for adjusting the rotating speed of the fan, and the middle of the air inlet pipe is provided with a pressure sensor. The outer end of the pressure sensor is connected with a controller; the controller is in signal connection with the frequency converter; the air knife air pressure is detected through the air pressure sensor, the PLC controls the frequency of the frequency converter, it is ensured that the air knife air pressure is stable, and remote control is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of galvanized steel plate production, in particular to a remote control system for an air knife fan. Background Art

[0002] Galvanized thin steel plate is a raw material used in construction, industry and other fields. The manufacturers of galvanized plates use air knife devices and zinc pots to galvanize the surface of the steel plates. That is, the steel plates pass through the zinc pot at a certain speed so that the surface sticks to the zinc liquid. The high-pressure airflow blown out by the air knife device on both sides of the steel plates out of the zinc liquid makes the zinc liquid spread evenly and controls the thickness of the zinc layer. In this process, parameters such as wind pressure and wind speed have a great influence on the galvanizing effect. The existing air knife device can only be adjusted on-site and cannot be remotely controlled. There is no record of wind pressure adjustment, so it is impossible to conduct a review. Summary of the invention

[0003] The main purpose of the utility model is to solve the problems existing in the above-mentioned prior art and provide an air knife blower remote control system.

[0004] The specific scheme of the utility model is: a remote control system for an air knife fan, including an air knife device, the air knife device is provided with an air inlet pipe, the inlet of the air inlet pipe is connected to a fan, the fan is a variable frequency fan, the input end of the variable frequency fan is equipped with a frequency converter, the frequency converter is used to adjust the speed of the fan, a pressure sensor is installed in the middle of the air inlet pipe, the outer end of the pressure sensor is connected to a controller, and the controller is connected to the frequency converter signal.

[0005] Furthermore, the controller is also connected to an HMI display, and the HMI is used to display the wind pressure in the intake pipe in real time.

[0006] Furthermore, the controller adopts a PLC controller.

[0007] Furthermore, a pressure gauge is installed on the air intake pipe, and the pressure gauge is used to display the air pressure in the air intake pipe in real time.

[0008] Compared with the prior art, the utility model has the following advantages: 1. The air knife air pressure is detected by the air pressure sensor, and the PLC controls the frequency of the frequency converter to ensure the stability of the air knife air pressure and realize remote control; 2. By setting an HMI display, the historical curve record of the air pressure adjustment is retained, providing a basis for review work. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] In the figure: 1. HMI display; 2. PLC controller; 3. Pressure sensor; 4. Frequency converter; 5. Frequency converter fan; 6. Air knife device; 7. Pressure gauge; 8. Steel plate; 9. Zinc pot. DETAILED DESCRIPTION

[0011] See also Figure 1 The present embodiment is a remote control system for an air knife fan, comprising an air knife device 6, the air knife device 6 is provided with an air inlet pipe, the inlet of the air inlet pipe is connected to a fan, the fan is a variable frequency fan 5, the input end of the variable frequency fan 5 is equipped with a frequency converter 4, the frequency converter 4 is used to adjust the speed of the fan, a pressure sensor 3 is installed in the middle of the air inlet pipe, the outer end of the pressure sensor 3 is connected to a controller, and the controller is connected to the frequency converter 4 signal.

[0012] Furthermore, the controller is also connected to an HMI display 1, and the HMI is used to display the wind pressure in the air intake pipe in real time and record the data to form a curve. Furthermore, the controller adopts a PLC controller 2.

[0013] Furthermore, a pressure gauge 7 is installed on the air intake pipe, and the pressure gauge 7 is used to display the air pressure in the air intake pipe in real time.

[0014] The working principle of the utility model is as follows: the air pressure in the air intake pipe is detected in real time by the pressure sensor 3, and the detection data is transmitted to the PLC controller 2, and the PLC controller 2 compares the detection data with the set air pressure value. If the deviation is large, the PLC controller 2 controls the frequency converter 4 to adjust it, and adjusts the actual wind pressure by adjusting the speed of the fan, so that the actual wind pressure is stabilized within a certain error range of the set wind pressure, thereby ensuring the stability of the galvanizing quality.

Claims

1. A remote control system for an air knife fan, comprising an air knife device, the air knife device being provided with an air inlet pipe, the inlet of the air inlet pipe being connected to a fan, wherein: The fan is a variable frequency fan, the input end of which is equipped with a frequency converter for adjusting the speed of the fan. A pressure sensor is installed in the middle of the air inlet pipe, the outer end of the pressure sensor is connected to a controller, and the controller is connected to the frequency converter signal.

2. The air knife blower remote control system according to claim 1 is characterized in that: The controller is also connected to an HMI display, which is used to display the wind pressure in the air intake pipe in real time and record the data to form a curve.

3. The air knife blower remote control system according to claim 1, characterized in that: The controller adopts a PLC controller.

4. The air knife blower remote control system according to claim 1, characterized in that: The air intake pipe is provided with a pressure gauge, which is used to display the air pressure in the air intake pipe in real time.

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