Automatic time-sharing cleaning device for double-inlet and double-outlet coal mill pipeline

Abstract

The utility model discloses an automatic time-sharing cleaning device for a double-inlet and double-outlet coal mill pipeline, which comprises a purging head connected to an air compression pipeline, a constant-current control box is arranged on the air compression pipeline, and the constant-current control box is electrically connected with an upper computer in a central control room; the blowing head is sleeved with a sleeve communicated with the blowing head, the sleeve is communicated with a pressure guiding pipe, the pressure guiding pipe is provided with a pressure transmitter, and the output end of the pressure transmitter is connected with the input end of the constant-current control box. A filter, a pressure reducing and stabilizing device, a rotor flow meter and a cleaning air valve are sequentially arranged on the air compression pipeline in the constant-current control box, and a PLC (Programmable Logic Controller) is arranged in the constant-current control box. The constant flow control box is arranged on the compressed air pipeline to control the blowing flow entering the blowing head, the blowing pressure of the blowing head is collected through the pressure transmitter, automatic adjustment of blowing is achieved, the sweeping time and the interval time are controlled according to the PLC, and the sweeping effect and the sweeping efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, and more specifically to an automatic time-sharing cleaning device for the pipeline of a double-inlet double-outlet coal mill. Background Technology

[0002] A double-inlet, double-outlet coal mill is a cylindrical coal mill that can feed and discharge material at both ends of its cylinder. Based on the principles of fluid mechanics and tribology, it uses the rotation of the cylinder to mix, crush, and grind the material with steel balls. The dry medium airflow entering from both ends flows in opposite directions after being opposed in the middle of the cylinder, carrying pulverized coal out through the two hollow shafts and into the pulverized coal separator, forming two symmetrical yet independent coal grinding circuits.

[0003] Because the powder output from the grinding process is relatively fine, it is easily adsorbed on the coal mill pipeline, especially when the coal powder has a high moisture content, it is easy to stick to the inner wall of the pipeline. In order to ensure the smooth discharge of coal powder, the coal mill pipeline needs to be cleaned. The existing cleaning method is to manually use a handheld jet cleaner to blow and clean. The frequency and time of cleaning are entirely controlled by the operator, and sometimes they forget to do so, which affects the normal discharge of the coal mill. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an automatic time-sharing cleaning device for the pipeline of a double-inlet double-outlet coal mill, which can realize the cleaning of the gas path and time-sharing measurement, thereby improving the cleaning effect of the coal mill pipeline.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] An automatic time-sharing cleaning device for a dual-inlet, dual-outlet coal mill pipeline includes a purging head connected to an air compression pipeline for extending into the coal mill pipeline to clean it. A constant flow control box for controlling the airflow from the purging head is installed on the air compression pipeline and is connected to a host computer in a central control room. A sleeve connecting the purging head is fitted onto the purging head, and a pressure tap is connected to the sleeve via a pressure tap interface. A pressure transmitter for collecting pressure signals from inside the purging head is installed on the pressure tap, and the output of the pressure transmitter is connected to... The constant flow control box has an input terminal; the air compression pipeline inside the constant flow control box is sequentially equipped with a filter for filtering impurities in the compressed air source, a pressure reducer for stabilizing the air supply, a rotor flow meter for collecting gas flow, and a purge air valve for controlling the blowing air volume. The constant flow control box is equipped with a PLC controller. The output terminals of the pressure transmitter and rotor flow meter are respectively connected to the output terminal of the PLC controller. The output terminal of the PLC controller is connected to the input terminal of the purge air valve. The PLC controller is electrically connected to the host computer.

[0007] To further optimize the technical solution, a constant flow control box is installed below the filter, along with a drain pipe for discharging filtered impurities and moisture.

[0008] To further optimize the technical solution, a drain valve for controlling the discharge of sewage is installed on the sewage pipe.

[0009] To further optimize the technical solution, a compressor for providing compressed air is connected to the air compression pipeline.

[0010] To further optimize the technical solution, an alarm is installed in the central control room to issue fault alarms, and the input terminal of the alarm is connected to the output terminal of the PLC controller.

[0011] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0012] This utility model provides an automatic time-sharing cleaning device for a double-inlet, double-outlet coal mill pipeline. By setting a constant flow control box on the compressed air pipeline to control the air flow rate entering the cleaning head, and by collecting the air pressure of the cleaning head through a pressure transmitter, the automatic adjustment of the air flow is realized. The cleaning time and interval are controlled by a PLC controller, which improves the cleaning effect and cleaning efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] The components include: 1. Compressor, 2. Air compression pipeline, 3. Purge head, 4. Constant flow control box, 5. Filter, 6. Drain pipe, 7. Drain valve, 8. Pressure reducer, 9. Rotor flow meter, 10. Cleaning air valve, 11. Sleeve, 12. Pressure tap interface, 13. Pressure tap, 14. Pressure transmitter, 15. PLC controller, 16. Host computer, and 17. Alarm. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] An automatic time-sharing cleaning device for the pipeline of a double-inlet double-outlet coal mill, combined with Figure 1 As shown, it includes a compressor 1, an air compression pipeline 2, and a purge head 3. The compressor 1 is connected to the purge head 3 through the air compression pipeline 2. The compressor 1 is used to provide a source of compressed air. The purge head 3 is used to extend into the coal mill pipeline to clean the coal mill pipeline. The compressed air generated by the compressor is delivered to the purge head through the air compression pipeline to clean the coal mill pipeline.

[0017] A constant current control box 4 is installed on the air compression pipeline 2 to control the air blowing of the purge head. The constant current control box 4 is electrically connected to the host computer 16 in the central control room, so that the host computer can control the constant current control box.

[0018] The air compression pipeline 2 inside the constant flow control box 4 is sequentially equipped with a filter 5, a pressure reducer 8, a rotor flow meter 9, and a purge valve 10. The filter 5 filters impurities and moisture from the compressed air source, preventing them from entering the pressure reducer and rotor flow meter, thus ensuring long-term normal operation of the equipment. The pressure reducer 8 stabilizes the air supply, the rotor flow meter 9 collects the gas flow rate, and the purge valve 10 controls the blowing flow. The constant flow control box 4 contains a PLC controller 15 for controlling the purge process. The output of the rotor flow meter is connected to the input of the PLC controller, and the output of the PLC controller is connected to the input of the purge valve. The PLC controller is electrically connected to a host computer. The host computer sets the purge time and interval, sending control commands to the PLC controller, which then controls the purge valve to achieve timed purge of the coal mill pipeline.

[0019] A sleeve 11 is fitted onto the purge head 3. A pressure tap 13 is connected to the sleeve 11 via a pressure tap interface 12. A pressure transmitter 14 is installed on the pressure tap 13. The pressure transmitter is used to collect the pressure signal inside the purge head. The output of the pressure transmitter is connected to the input of a PLC controller. The PLC controller understands the air path status based on the pressure signal collected by the pressure transmitter and adjusts the purging air valve accordingly. When the collected pressure increases, it indicates that there is a large amount of powder accumulation in the coal mill pipeline; when the collected pressure decreases, it indicates that there is a small amount of powder accumulation in the coal mill pipeline, thus ensuring accurate material level measurement in the dual-inlet, dual-outlet coal mill.

[0020] A drain pipe 6 is installed below the filter 5. The drain pipe 6 extends out of the constant flow control box 4 to discharge the filtered impurities and water. A drain valve 7 is installed on the drain pipe 6. The drain valve can discharge the filtered impurities and water, so as to clean the filtered waste in the filter in a timely manner.

[0021] An alarm 17 is also installed in the central control room. When a malfunction occurs, it will sound an alarm to remind staff to deal with it in time, so as to ensure the stable operation of the cleaning device and the coal mill equipment.

[0022] This invention, when cleaning the coal mill pipeline, allows the host computer to set the cleaning time and interval. During cleaning, the compressor starts to provide compressed air. The compressed air passes through the air compression pipeline, is filtered to remove impurities in the constant flow control box, and then enters the purging head through the pressure reducer, rotor flow meter, and cleaning air valve to clean the coal mill pipeline. During the cleaning process, the pressure transmitter collects pressure signals through the pressure tapping pipe, and the PLC controller adjusts the blowing pressure of the purging head in a timely manner based on the collected pressure signals, realizing automatic adjustment of the cleaning pressure and improving the cleaning efficiency and effect.

Claims

1. An automatic time-sharing cleaning device for the pipeline of a double-inlet, double-outlet coal mill, characterized in that: The system includes a purging head (3) connected to an air compression pipeline (2) for extending into the coal mill pipeline to clean it. A constant flow control box (4) for controlling the air blowing from the purging head is installed on the air compression pipeline (2), and the constant flow control box (4) is electrically connected to the host computer (16) in the central control room. A sleeve (11) is fitted onto the purging head (3), and a pressure tap (13) is connected to the sleeve (11) via a pressure tap interface (12). A pressure transmitter (14) for collecting pressure signals from inside the purging head is installed on the pressure tap (13), and the output end of the pressure transmitter is connected to... The constant flow control box (4) has an input terminal; the air compression pipeline (2) inside the constant flow control box (4) is provided with a filter (5) for filtering impurities in the compressed air source, a pressure reducing regulator (8) for stabilizing the air supply source, a rotor flow meter (9) for collecting gas flow rate, and a purge air valve (10) for controlling the blowing air flow rate. The constant flow control box (4) is provided with a PLC controller (15). The output terminals of the pressure transmitter and the rotor flow meter are respectively connected to the output terminal of the PLC controller. The output terminal of the PLC controller is connected to the input terminal of the purge air valve. The PLC controller is electrically connected to the host computer.

2. The automatic time-sharing cleaning device for a double-inlet, double-outlet coal mill pipeline according to claim 1, characterized in that: Below the filter (5) is an extended constant flow control box (4) and a drain pipe (6) for discharging filtered impurities and water.

3. The automatic time-sharing cleaning device for a double-inlet, double-outlet coal mill pipeline according to claim 2, characterized in that: The sewage pipe (6) is equipped with a sewage valve (7) for controlling sewage discharge.

4. The automatic time-sharing cleaning device for a double-inlet, double-outlet coal mill pipeline according to claim 1, characterized in that: The air compression pipeline (2) is connected to a compressor (1) for providing compressed air.

5. The automatic time-sharing cleaning device for a double-inlet, double-outlet coal mill pipeline according to claim 1, characterized in that: The central control room is equipped with an alarm (17) for issuing fault alarms, and the input terminal of the alarm is connected to the output terminal of the PLC controller.

Images