Constant pressure automatic control system for air compressor

Abstract

The utility model discloses a kind of air compressor constant pressure automation control system, technical scheme is as follows: including multiple air compressor gas supply unit, multiple air compressor gas supply unit is connected with gas storage tank, gas storage tank is connected with the ash conveying branch pipe of ash bin and the cooling pipe of camera respectively by gas supply main pipe, multiple ash conveying branch pipe is installed with the pressure detector of the electrical connection of PLC controller, ash blowing valve, ash conveying branch pipe is provided with the loose system connected with gas supply main pipe in ash bin connecting place, cooling pipe is installed with the pressure detector of the electrical connection of PLC controller, cooling valve, the utility model is in real time by PLC controller Monitoring each ash conveying and camera cooling pipe branch pressure and linkage control air compressor gas supply unit and valve device, effectively solve the technical problem that ash conveying branch pipe is blocked and camera cooling pressure is unstable, with The advantage that multiple branch pressure accurate regulation and control and system collaborative control are realized.

Description

Technical Field

[0001] This utility model relates to the field of stable gas supply, specifically to a constant pressure automated control system for an air compressor. Background Technology

[0002] The plant's air compressor supply system primarily provides a stable air source for the pneumatic conveying of dust collector hoppers and for cooling the cameras. In the existing system, the dust collector hoppers transport collected dust via pneumatic conveying, while the cameras require a continuous and stable cooling airflow to prevent overheating damage. However, the control valve structure used in the current system's control pipelines is relatively simple. Figure 2 As shown in the diagram, the inability to precisely adjust the airflow pressure results in significant system defects: on the one hand, the pneumatic ash conveying pipeline frequently becomes clogged due to pressure fluctuations, severely affecting dust removal efficiency; on the other hand, unstable airflow pressure in the camera cooling system easily leads to insufficient cooling, causing the camera to overheat and burn out. These problems not only increase equipment maintenance costs but also severely disrupt continuous production.

[0003] Existing technologies lack integrated solutions capable of simultaneously and accurately controlling the pressure of multiple branches, particularly in addressing complex needs such as early warning and unblocking of ash conveying branch pipes and maintaining cooling system pressure. The lack of a coordinated control mechanism between system modules results in an inability to respond quickly to localized pressure anomalies; for example, it may fail to activate unblocking devices promptly when ash conveying branch pipes are blocked, or it may struggle to quickly compensate for insufficient camera cooling pressure. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an automated control system for constant pressure in air compressors.

[0005] This utility model is achieved through the following technical solution:

[0006] This application provides an automatic constant pressure control system for an air compressor, the technical solution of which is as follows: it includes multiple air compressor supply units, which are connected to an air storage tank. The air storage tank is connected to the ash conveying branch pipe of the ash silo and the cooling pipe of the camera through the main air supply pipe. The multiple ash conveying branch pipes are equipped with pressure detectors and soot blowing valves that are electrically connected to the PLC controller. A loosening system connected to the main air supply pipe is set at the connection between the ash conveying branch pipe and the ash silo. A pressure detector and a cooling valve that are electrically connected to the PLC controller are installed on the cooling pipe.

[0007] Furthermore, this application also proposes that the pressure detector feeds back the pressure values ​​detected on the ash conveying branch pipe and cooling pipe to the PLC controller, and the PLC controller controls the start of multiple air compressor supply units to maintain constant pressure air supply.

[0008] Furthermore, this application also proposes that the loosening system includes an air storage bladder connected to the main gas supply pipe. The air storage bladder is inclinedly connected to the ash conveying branch pipe and the ash outlet of the ash silo via multiple ash loosening pipes. A collection hopper is bypassed at the rear end of the connection between the ash conveying branch pipe and the ash outlet of the ash silo. A collection valve electrically connected to the PLC controller is installed at the inlet of the collection hopper.

[0009] Furthermore, this application also proposes that when the ash blowing valve opens and the ash conveying pressure detector detects that the ash conveying pressure is at the blockage value set by the PLC controller, the PLC controller controls the start of the corresponding loosening system to clear the blockage connection between the ash conveying branch pipe and the ash outlet of the ash silo.

[0010] Furthermore, this application also proposes that the air compressor supply unit includes an air compressor, a buffer tank, and a dryer connected in sequence, and the air compressor is electrically connected to a PLC controller.

[0011] Compared with existing technologies, the advantages of this utility model are: This utility model uses a PLC controller to monitor the pressure of each ash conveying and camera cooling pipe branch in real time and to control the air compressor supply unit and valve device in conjunction, which effectively solves the technical problems of ash conveying branch pipe blockage and unstable camera cooling pressure. It has the advantages of achieving precise control of multi-branch pressure and system coordinated control. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system of this utility model;

[0013] Figure 2 This is a schematic diagram of the existing system in this utility model;

[0014] In the diagram: 1. Air compressor; 2. Buffer tank; 3. Dryer; 4. Air storage tank; 5. Main air supply pipe; 6. Ash conveying branch pipe; 7. Pressure detector; 8. Ash blowing valve; 9. Air storage bag; 10. Ash discharge pipe; 11. Control valve; 12. Collection hopper; 13. Collection valve; 14. Camera; 15. Cooling pipe; 16. Cooling valve; 17. PLC controller. Detailed Implementation

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

[0016] like Figure 1 As shown, this application proposes a constant pressure automated control system for an air compressor, including multiple air compressor supply units. These units are connected to an air storage tank, which is connected via a main air supply pipe to ash conveying branch pipes of an ash silo and a cooling pipe of a camera. Each ash conveying branch pipe is equipped with a pressure sensor and a soot blowing valve electrically connected to a PLC controller. A loosening system connected to the main air supply pipe is installed at the connection point between the ash conveying branch pipe and the ash silo. A pressure sensor and a cooling valve electrically connected to the PLC controller are installed on the cooling pipe.

[0017] The air compressor supply unit can be a screw air compressor. The capacity of the air tank can be selected according to actual air demand, typically 1-10 cubic meters. The diameter of the main air supply pipe is preferably 50-200mm, with the specific dimensions determined based on the system's air supply volume. The pressure sensor can be a capacitive sensor, with a recommended range of 0-1.6MPa. The soot blowing valve and cooling valve can be solenoid valves or automatically controlled valves.

[0018] This technical solution uses a pressure detector to monitor the pressure of the ash conveying branch pipe and cooling pipe in real time, transmitting the detection signals to a PLC controller. When the pressure falls below the set value, the PLC controller adjusts the operating status of the air compressor supply unit to ensure stable system pressure. The loosening system can clear blockages in the ash conveying branch pipe, preventing interruptions in the pneumatic conveying of ash. Stable pressure in the cooling pipe ensures continuous and effective cooling of the camera, preventing overheating and damage. This automated control system effectively solves the problems of ash conveying pipe blockage and camera burnout caused by unstable pressure in traditional air supply systems, improving the reliability of production operations.

[0019] Furthermore, this application also proposes that the pressure detector feeds back the pressure values ​​detected on the ash conveying branch pipe and cooling pipe to the PLC controller, and the PLC controller controls the start of multiple air compressor supply units to maintain constant pressure air supply.

[0020] Specifically, the pressure detector is installed at specific locations on the ash conveying branch pipe and cooling pipe to monitor changes in internal pipe pressure in real time. The detection signal is transmitted to the PLC controller via a 4-20mA analog signal or an RS485 digital signal. The PLC controller has a built-in PID control algorithm that dynamically adjusts the number of start-ups and shutdowns and the operating frequency of the air compressor supply unit based on the deviation between the set pressure value and the actual detection value. As a preferred implementation, the air compressor supply unit can use frequency conversion control to achieve stepless adjustment of the supply pressure by adjusting the motor speed.

[0021] Therefore, this technical solution achieves dynamic balance of air supply pressure through a closed-loop control system. When pressure fluctuations occur in the ash conveying branch pipe due to the operation of the ash silo, the pressure detector provides real-time feedback, and the PLC controller immediately adjusts the air compressor output to ensure that the ash conveying pressure remains stable within the set range. Simultaneously, the stable pressure in the cooling pipeline prevents overheating damage to the camera due to insufficient cooling. Compared to the simple valve control in existing technologies, this solution significantly improves the accuracy and response speed of pressure control, effectively solving the technical problems of blockage in pneumatic ash conveying pipelines and camera cooling failure.

[0022] Furthermore, this application also proposes that the loosening system includes an air storage bladder connected to the main gas supply pipe. The air storage bladder is inclinedly connected to the ash conveying branch pipe and the ash outlet of the ash silo via multiple ash loosening pipes. A collection hopper is bypassed at the rear end of the connection between the ash conveying branch pipe and the ash outlet of the ash silo. A collection valve electrically connected to the PLC controller is installed at the inlet of the collection hopper.

[0023] Specifically, the air reservoir is made of pressure-resistant rubber material, with a volume of 50-100 liters and a working pressure range of 0.6-1.0 MPa. The ash collection pipe is made of stainless steel, with a diameter of 15-25 mm, and connects to the ash conveying branch pipe at a 30-45 degree angle. The collection hopper has a volume of 20-30 liters, adopts a conical design to facilitate dust accumulation, and the collection valve adopts a solenoid valve structure with a response time of less than 0.5 seconds.

[0024] Therefore, this technical solution, by incorporating an air reservoir and an inclined ash-clearing pipe, can generate a high-pressure airflow to effectively remove accumulated ash from the ash silo outlet when the ash conveying branch pipe is blocked. The collection hopper prevents dust from polluting the environment during the unblocking process, and the collected dust can be reused. The PLC controller monitors pressure data in real time and controls the opening and closing of the collection valve, achieving automatic blockage detection and closed-loop control of the unblocking process. Compared with existing technologies, this solution solves the problems of low efficiency and high labor intensity associated with traditional manual unblocking, significantly improving the operational reliability of the ash silo pneumatic conveying system.

[0025] Furthermore, this application also proposes that when the soot blowing valve opens the ash hopper and the ash conveying pressure detector detects that the ash conveying pressure is at the blockage value set by the PLC controller, the PLC controller controls the start of the corresponding loosening system to clear the blockage at the connection between the ash conveying branch pipe and the ash outlet of the ash hopper.

[0026] Specifically, the loosening system includes an air storage bladder connected to the main air supply pipe. This bladder is connected at an angle to the ash conveying branch pipe and the ash silo outlet via multiple ash-loosening pipes. A collection hopper is installed as a bypass at the rear end of the connection between the ash conveying branch pipe and the ash silo outlet, and a collection valve electrically connected to a PLC controller is installed at the inlet of the collection hopper. As a preferred embodiment, the ash-loosening pipes can be high-pressure resistant flexible hoses, with an inclination angle preferably of 30-45 degrees to facilitate the impact of high-pressure airflow on the blocked area. The volume of the air storage bladder can be designed to be 2-3 times the volume of the ash conveying branch pipe, ensuring sufficient clogging pressure. The PLC controller's blockage value setting is typically 1.5-2 times the normal operating pressure, and the specific value can be adjusted according to the characteristics of different ash silos.

[0027] Therefore, this technical solution effectively solves the problem of blockage in the pneumatic conveying pipeline of the ash silo by automatically activating the loosening system to clear blockages when they are detected through real-time monitoring of the ash conveying pressure. Compared with existing technologies, this solution achieves automatic detection and handling of blockages, avoiding the lag of manual intervention and ensuring the continuous and stable operation of the pneumatic conveying system. Simultaneously, by setting up a collection hopper, the accumulated ash discharged during the clearing process can be collected centrally, avoiding secondary pollution. This solution is particularly suitable for pneumatic conveying systems of ash silos with high dust concentrations and a high risk of blockage.

[0028] Furthermore, this application also proposes a specific structural composition of an air compressor supply unit, which includes an air compressor, a buffer tank, and a dryer connected in sequence, wherein the air compressor is electrically connected to a PLC controller.

[0029] The air compressor, as the air source device, can be a screw compressor, with a typical discharge pressure range of 0.7-1.0 MPa. The buffer tank is used to stabilize airflow and eliminate pressure pulsations; its volume can be designed from 0.5-5 m³ according to system requirements. 3 The dryer preferably uses a refrigeration or adsorption drying device, with the dew point temperature controlled below -20℃. The PLC controller is connected to the air compressor via a 4-20mA analog signal or Modbus communication protocol to realize start-stop control and operation status monitoring.

[0030] Specifically, this technical solution forms a complete air handling chain by arranging an air compressor, a buffer tank, and a dryer in series. The buffer tank effectively absorbs airflow pulsations generated by the air compressor, while the dryer removes moisture from the compressed air, preventing icing in subsequent pipelines or corrosion of equipment. The electrical connection between the air compressor and the PLC controller allows for real-time adjustment of the air supply pressure according to system requirements. For example, when the pressure detector detects that the pipeline pressure is lower than the set value, the PLC can immediately start the air compressor to replenish the air supply. This structural design solves the problem of unstable air supply pressure mentioned in the background technology, avoiding blockages in the ash conveying pipeline and camera cooling failure caused by pressure fluctuations.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic constant pressure control system for an air compressor, comprising multiple air compressor supply units, wherein the multiple air compressor supply units are connected to an air storage tank (4), and the air storage tank (4) is connected to the ash conveying branch pipe (6) of the ash silo and the cooling pipe (15) of the camera (14) respectively via the main air supply pipe (5), characterized in that: Multiple ash conveying branch pipes (6) are equipped with pressure detectors (7) and soot blowing valves (8) that are electrically connected to the PLC controller (17). A loosening system connected to the main gas supply pipe (5) is provided at the connection between the ash conveying branch pipe (6) and the ash silo. A pressure detector (7) and a cooling valve (16) that are electrically connected to the PLC controller (17) are installed on the cooling pipe (15).

2. The constant pressure automated control system for an air compressor according to claim 1, characterized in that: The pressure detector (7) feeds back the pressure values ​​detected on the ash conveying branch pipe (6) and the cooling pipe (15) to the PLC controller (17), which then controls the start of multiple air compressor supply units to maintain constant pressure air supply.

3. The constant pressure automated control system for an air compressor according to claim 1, characterized in that: The loosening system includes an air storage bag (9) connected to the main gas supply pipe (5). The air storage bag (9) is inclinedly connected to the ash conveying branch pipe (6) and the ash outlet of the ash silo via multiple ash-loosening pipes (10). A collection hopper (12) is bypassed at the rear end of the connection between the ash conveying branch pipe (6) and the ash outlet of the ash silo. A collection valve (13) electrically connected to the PLC controller (17) is installed at the inlet of the collection hopper (12).

4. The constant pressure automated control system for an air compressor according to claim 3, characterized in that: When the soot blowing valve (8) is opened, the ash silo is put into operation. When the ash conveying pressure detector (7) detects that the ash conveying pressure is at the blockage value set by the PLC controller (17), the PLC controller (17) controls the start of the corresponding loosening system to clear the blockage connection between the ash conveying branch pipe (6) and the ash outlet of the ash silo.

5. The constant pressure automated control system for an air compressor according to claim 1, characterized in that: The air compressor supply unit includes an air compressor (1), a buffer tank (2), and a dryer (3) connected in sequence. The air compressor (1) is electrically connected to a PLC controller (17).

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