Pressure stabilizing device for pneumatic conveying system

Abstract

The utility model discloses a pressure stabilizing device for a pneumatic conveying system, comprising an air suspension fan, the air suspension fan is connected to an air storage tank through a pipeline, the air storage tank is connected to a conveying system pipeline, an overpressure venting pipeline is connected to the pipeline between the air suspension fan and the air storage tank, an outlet regulating valve is also provided on the pipeline between the air suspension fan and the air storage tank, the outlet regulating valve is located between the air suspension fan and the overpressure venting pipeline, a vent regulating valve is provided on the overpressure venting pipeline, and a material conveying component is connected to the conveying system pipeline; and also comprises a control component, which is electrically connected to the air suspension fan, the outlet regulating valve, the air storage tank, the vent regulating valve and the material conveying component respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic conveying, and in particular relates to a pressure stabilizing device for a pneumatic conveying system. Background Art

[0002] Pneumatic conveying, also known as air flow conveying, is a specific application of fluidization technology that uses the energy of air flow to convey granular materials in the direction of air flow in a closed pipeline. Pneumatic conveying has a series of advantages: high conveying efficiency, simple overall equipment structure, convenient maintenance and management, easy to realize automation, and conducive to environmental protection. Especially when used for internal conveying in factory workshops, the conveying process can be combined with the production process, which helps to simplify the process and equipment. To this end, it can greatly improve labor productivity, reduce costs and reduce floor space.

[0003] When the existing pneumatic conveying system is in operation, the pressure fluctuation is large, which can easily cause the air suspension fan to frequently shut down due to overpressure after it is put into use, resulting in frequent equipment damage and seriously affecting the stable operation of the production system. Utility Model Content

[0004] The utility model aims to provide a pressure stabilizing device for a pneumatic conveying system, which solves the problems of frequent overpressure shutdown and high failure rate of air suspension fans in the prior art pneumatic conveying systems.

[0005] The technical solution adopted by the utility model is: a pneumatic conveying system pressure stabilizing device includes an air suspension fan, the air suspension fan is connected to an air storage tank through a pipeline, the air storage tank is connected to a conveying system pipeline, the pipeline between the air suspension fan and the air storage tank is connected to an overpressure venting pipeline, the pipeline between the air suspension fan and the air storage tank is also provided with an outlet regulating valve, the outlet regulating valve is located between the air suspension fan and the overpressure venting pipeline, the overpressure venting pipeline is provided with a vent regulating valve, and the conveying system pipeline is connected to a material conveying component;

[0006] It also includes a control component, which is electrically connected to the air suspension fan, the outlet regulating valve, the air storage tank, the vent regulating valve and the material conveying component.

[0007] The utility model is also characterized in that:

[0008] The material conveying component comprises a star-shaped feeder, which is connected with a conveying system pipeline and is also connected with a buffer hopper.

[0009] The control component includes a PLC control box. A fan outlet pressure monitoring module is installed at the port of the air suspension fan on the pipeline between the air suspension fan and the air tank, and a gas tank pressure monitoring module is installed on the gas tank. The PLC control box is electrically connected to the fan outlet pressure monitoring module, the gas tank pressure monitoring module, the outlet regulating valve, the gas tank and the star-shaped feeder respectively.

[0010] The PLC control box includes a control module and a data processing module.

[0011] The contact point of the pipeline between the air storage tank and the air suspension fan is located between the pressure monitoring module after the outlet regulating valve and the contact port between the air storage tank and the pipeline of the delivery system.

[0012] The beneficial effects of the utility model are:

[0013] (1) The auxiliary control system in the voltage stabilizing device of the utility model can help the air suspension fan to be effectively used in the pneumatic conveying system, thereby reducing the energy consumption of the conveying system;

[0014] (2) The voltage stabilizing device of the utility model can reduce the frequency of shutdown due to failure of the air suspension fan, reduce the frequency of maintenance operations, extend the service life of the equipment and reduce the safety risks of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the flow of the voltage stabilizing device of the utility model.

[0016] In the figure, 1. air suspension fan, 2. outlet regulating valve, 3. gas storage tank, 4. star-shaped feeder, 5. buffer hopper, 6. vent regulating valve, 7. PLC control box, 8. conveying system pipeline, 9. overpressure vent pipeline, 10. outlet pressure monitoring module, 11. gas storage tank pressure monitoring module. DETAILED DESCRIPTION

[0017] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0018] The utility model pneumatic conveying system pressure stabilizing device, such as Figure 1 As shown, it includes an air suspension fan 1, the air suspension fan 1 is connected to an air storage tank 3 through a pipeline, the air storage tank 3 is connected to a conveying system pipeline 8, the conveying system pipeline 8 is used to guide the airflow to blow the dilute phase material to the large silo, the pipeline between the air suspension fan 1 and the air storage tank 3 is connected to an overpressure venting pipeline 9, the pipeline between the air suspension fan 1 and the air storage tank 3 is also provided with an outlet regulating valve 2, the outlet regulating valve 2 is located between the air suspension fan 1 and the overpressure venting pipeline 9, the overpressure venting pipeline 9 is provided with a vent regulating valve 6, and the conveying system pipeline 8 is connected to a material conveying component;

[0019] The air suspension fan 1 is used to provide power for the pneumatic conveying system, and the outlet regulating valve 2 is used to control the outlet pressure and air volume of the air suspension fan 1; the air storage tank 3 is used for gas buffering in the system to delay the impact of air flow changes in the pipeline on the state of the air suspension fan; the vent regulating valve 6 is used to discharge overpressure gas.

[0020] It also includes a control component, which is electrically connected to the air suspension fan 1, the outlet regulating valve 2, the air storage tank 3, the vent regulating valve 6 and the material conveying component.

[0021] Among them, the material conveying component includes a star-shaped feeder 4, which is used to evenly supply materials while preventing airflow from being discharged from the material pipeline. The star-shaped feeder 4 is connected to the conveying system pipeline 8, and the star-shaped feeder 4 is also connected to a buffer hopper 5 for buffering materials.

[0022] The control component includes a PLC control box 7, which includes a control module and a data processing module. An outlet pressure monitoring module 10 is installed at the port of the pipeline between the air suspension fan 1 and the air tank 3 near the air suspension fan 1, and an air tank pressure monitoring module 11 is installed on the air tank 3. The PLC control box 7 is electrically connected to the outlet pressure monitoring module 10, the air tank pressure monitoring module 11, the outlet regulating valve 2, the air tank 3 and the star-shaped feeder 4 respectively.

[0023] The contact point of the pipeline between the gas storage tank 3 and the air suspension fan 1 is located between the gas storage tank pressure monitoring module 11 and the contact port between the gas storage tank 3 and the delivery system pipeline 8 .

[0024] In this solution, the outlet pressure monitoring module 10 is used to monitor the outlet pressure of the fan and transmit the monitored pressure signal to the control box 7; the gas tank pressure monitoring module 11 is used to monitor the gas tank pressure and transmit the monitored pressure signal to the PLC control box 7; the PLC control box 7 is used to control the status of the outlet regulating valve 2, the vent regulating valve 6 and the star-shaped feeder 4 according to the monitored pressure change signal. When the system is over-pressured, the unit protection control is performed by controlling the vent regulating valve 6, the outlet regulating valve 2 and the star-shaped feeder 4; when the system is depressurized, the unit protection control is performed by controlling the outlet regulating valve 2.

[0025] Specifically, the gas tank pressure monitoring module 11 monitors the pressure of the gas tank 3 at the outlet of the fan and transmits it to the auxiliary control system. When the upper limit of the system detection pressure value exceeds 90kPa (adjustable), the auxiliary control system issues an instruction to stop the star-shaped feeder 4 and open the venting regulating valve 6. The venting regulating valve 6 is instantly opened to the specified valve position. When the system detection pressure is lower than 75kPa (adjustable), the outlet regulating valve 2 is gradually closed at a speed of 3% per second.

[0026] When the PLC control box 7 detects that the fan outlet pressure monitoring module 10 is lower than 50kPa (adjustable), the fan outlet regulating valve 2 is closed at a speed of 1.5% per second to increase the outlet pressure and ensure that the air-suspended fan rotor has sufficient "buoyancy"; when the outlet pressure is higher than 65kPa (adjustable), the fan outlet regulating valve 2 is opened at a speed of 1.5% per second to ensure the normal operation of the fan and the stability of the conveying system.

[0027] Example 1

[0028] The utility model pneumatic conveying system pressure stabilizing device, such as Figure 1 As shown, it includes an air suspension fan 1, the air suspension fan 1 is connected to an air storage tank 3 through a pipeline, the air storage tank 3 is connected to a conveying system pipeline 8, the conveying system pipeline 8 is used to guide the airflow to blow the dilute phase material to the large silo, the pipeline between the air suspension fan 1 and the air storage tank 3 is connected to an overpressure venting pipeline 9, the pipeline between the air suspension fan 1 and the air storage tank 3 is also provided with an outlet regulating valve 2, the outlet regulating valve 2 is located between the air suspension fan 1 and the overpressure venting pipeline 9, the overpressure venting pipeline 9 is provided with a vent regulating valve 6, and the conveying system pipeline 8 is connected to a material conveying component;

[0029] The air suspension fan 1 provides power for the pneumatic conveying system, and the outlet regulating valve 2 is used to control the outlet pressure and air volume of the air suspension fan 1; the gas storage tank 3 is used for gas buffering in the system to delay the impact of air flow changes in the pipeline on the state of the air suspension fan; the vent regulating valve 6 is used to discharge overpressure gas.

[0030] It also includes a control component, which is electrically connected to the air suspension fan 1, the outlet regulating valve 2, the air storage tank 3, the vent regulating valve 6 and the material conveying component.

[0031] Among them, the material conveying component includes a star-shaped feeder 4, which is used to evenly supply materials while preventing airflow from being discharged from the material pipeline. The star-shaped feeder 4 is connected to the conveying system pipeline 8, and the star-shaped feeder 4 is also connected to a buffer hopper 5 for buffering materials.

[0032] Example 2

[0033] The utility model pneumatic conveying system pressure stabilizing device, such as Figure 1As shown, it includes an air suspension fan 1, the air suspension fan 1 is connected to an air storage tank 3 through a pipeline, the air storage tank 3 is connected to a conveying system pipeline 8, the conveying system pipeline 8 is used to guide the airflow to blow the dilute phase material to the large silo, the pipeline between the air suspension fan 1 and the air storage tank 3 is connected to an overpressure venting pipeline 9, the pipeline between the air suspension fan 1 and the air storage tank 3 is also provided with an outlet regulating valve 2, the outlet regulating valve 2 is located between the air suspension fan 1 and the overpressure venting pipeline 9, the overpressure venting pipeline 9 is provided with a vent regulating valve 6, and the conveying system pipeline 8 is connected to a material conveying component;

[0034] The air suspension fan 1 is used to provide power for the pneumatic conveying system, and the outlet regulating valve 2 is used to control the outlet pressure and air volume of the air suspension fan 1; the air storage tank 3 is used for gas buffering in the system to delay the impact of air flow changes in the pipeline on the state of the air suspension fan; the vent regulating valve 6 is used to discharge overpressure gas.

[0035] It also includes a control component, which is electrically connected to the air suspension fan 1, the outlet regulating valve 2, the air storage tank 3, the vent regulating valve 6 and the material conveying component.

[0036] Among them, the material conveying component includes a star-shaped feeder 4, which is used to evenly supply materials while preventing airflow from being discharged from the material pipeline. The star-shaped feeder 4 is connected to the conveying system pipeline 8, and the star-shaped feeder 4 is also connected to a buffer hopper 5 for buffering materials.

[0037] The control component includes a PLC control box 7, which includes a control module and a data processing module. An outlet pressure monitoring module 10 is installed at the port of the pipeline between the air suspension fan 1 and the air tank 3 near the air suspension fan 1, and an air tank pressure monitoring module 11 is installed on the air tank 3. The PLC control box 7 is electrically connected to the outlet pressure monitoring module 10, the air tank pressure monitoring module 11, the outlet regulating valve 2, the air tank 3 and the star-shaped feeder 4 respectively.

[0038] Example 3

[0039] In this solution, the outlet pressure monitoring module 10 is used to monitor the outlet pressure of the fan and transmit the monitored pressure signal to the control box 7; the gas tank pressure monitoring module 11 is used to monitor the gas tank pressure and transmit the monitored pressure signal to the PLC control box 7; the PLC control box 7 is used to control the status of the outlet regulating valve 2, the vent regulating valve 6 and the star-shaped feeder 4 according to the monitored pressure change signal. When the system is over-pressured, the unit protection control is performed by controlling the vent regulating valve 6, the outlet regulating valve 2 and the star-shaped feeder 4; when the system is depressurized, the unit protection control is performed by controlling the outlet regulating valve 2.

[0040] Specifically, the gas tank pressure monitoring module 11 monitors the pressure of the gas tank 3 at the outlet of the fan and transmits it to the auxiliary control system. When the upper limit of the system detection pressure value exceeds 90kPa (adjustable), the auxiliary control system issues an instruction to stop the star-shaped feeder 4 and open the venting regulating valve 6. The venting regulating valve 6 is instantly opened to the specified valve position. When the system detection pressure is lower than 75kPa (adjustable), the outlet regulating valve 2 is gradually closed at a speed of 3% per second.

[0041] When the PLC control box 7 detects that the fan outlet pressure monitoring module 10 is lower than 50kPa (adjustable), the fan outlet regulating valve 2 is closed at a speed of 1.5% per second to increase the outlet pressure and ensure that the air-suspended fan rotor has sufficient "buoyancy"; when the outlet pressure is higher than 65kPa (adjustable), the fan outlet regulating valve 2 is opened at a speed of 1.5% per second to ensure the normal operation of the fan and the stability of the conveying system.

Claims

1. A pressure stabilizing device for a pneumatic conveying system, characterized in that: The invention comprises an air suspension fan (1), wherein the air suspension fan (1) is connected to an air storage tank (3) through a pipeline, the air storage tank (3) is connected to a conveying system pipeline (8), the pipeline between the air suspension fan (1) and the air storage tank (3) is connected to an overpressure venting pipeline (9), an outlet regulating valve (2) is also provided on the pipeline between the air suspension fan (1) and the air storage tank (3), the outlet regulating valve (2) is located between the air suspension fan (1) and the overpressure venting pipeline (9), the overpressure venting pipeline (9) is provided with a vent regulating valve (6), and the conveying system pipeline (8) is connected to a material conveying component; It also includes a control component, which is electrically connected to the air suspension fan (1), the outlet regulating valve (2), the air storage tank (3), the vent regulating valve (6) and the material conveying component.

2. The pressure stabilizing device for a pneumatic conveying system according to claim 1, characterized in that: The material conveying assembly comprises a star-shaped feeder (4), the star-shaped feeder (4) is connected to a conveying system pipeline (8), and the star-shaped feeder (4) is also connected to a buffer hopper (5).

3. The pressure stabilizing device for a pneumatic conveying system according to claim 2, characterized in that: The control assembly comprises a PLC control box (7); a fan outlet pressure monitoring module (10) is installed at a port of the pipeline between the air suspension fan (1) and the air storage tank (3) close to the air suspension fan (1); a gas storage tank pressure monitoring module (11) is installed on the gas storage tank (3); and the PLC control box (7) is electrically connected to the fan outlet pressure monitoring module (10), the gas storage tank pressure monitoring module (11), the outlet regulating valve (2), the gas storage tank (3) and the star-shaped feeder (4) respectively.

4. The pressure stabilizing device for a pneumatic conveying system according to claim 3, characterized in that: The PLC control box (7) comprises a control module and a data processing module.

5. The pressure stabilizing device for a pneumatic conveying system according to claim 4, characterized in that: The contact point of the pipeline between the gas storage tank (3) and the air suspension fan (1) is located between the gas storage tank pressure monitoring module (11) and the contact port between the gas storage tank (3) and the delivery system pipeline (8).

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