Automatic control system for starting exhaust of centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to an automatic control system for starting exhaust of a centrifugal pump, which comprises a motor, a centrifugal pump body, an exhaust pipe and a control system body, an exhaust port is arranged at the top of the centrifugal pump body, an electrically operated valve is mounted on the exhaust pipe, and a flowmeter is mounted on the exhaust pipe. The control system body receives instrument monitoring signals and transmission equipment driving signals through cables, the exhaust port is connected with the exhaust pipe, the electric valve is located above the flowmeter, the control system body receives the instrument monitoring signals and the transmission equipment driving signals through the cables, and the liquid level meter, the flowmeter, the electric valve and the motor are all connected with the control system body. The control system body completes automatic exhaust while the centrifugal pump body is started, manual field cooperation is not needed, the labor intensity is reduced, post configuration is optimized, normal starting of the centrifugal pump body can be guaranteed, the failure rate of the centrifugal pump is reduced, and the production intelligence level and the working efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and in particular to an automated control system for starting and venting a centrifugal pump. Background Technology

[0002] As the main liquid transport equipment, the operating efficiency of centrifugal pumps is crucial. Centrifugal pumps generate centrifugal force through the high-speed rotation of the impeller to achieve continuous water transport. When the pump is not in operation for a long time, air can easily accumulate, mainly at the top of the pump body. This can prevent the equipment from generating sufficient negative pressure during operation, affecting normal water delivery. In severe cases, cavitation can occur, damaging the impeller. Therefore, air must be purged before starting a centrifugal pump.

[0003] However, the existing centrifugal pump venting requires on-site personnel to open the vent valve, confirm that water is flowing out continuously, and then manually close it. This traditional method is time-consuming and labor-intensive, and there is a possibility that the gas inside the pump may not be vented. When an emergency occurs and the centrifugal pump needs to be started quickly, the existing method will waste valuable time and cause additional losses. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides an automated control system for centrifugal pump start-up and venting. This system solves the problem that existing centrifugal pump venting requires on-site personnel to open the vent valve, confirm continuous water flow, and then manually close it. This traditional method is time-consuming and labor-intensive, and may result in the pump not being fully vented. In emergency situations where the centrifugal pump needs to be started quickly, the existing method wastes valuable time and causes additional losses.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automated control system for starting and venting a centrifugal pump includes a motor, a centrifugal pump body, an exhaust pipe, and a control system body. The centrifugal pump body has an exhaust port on its top, an electric valve is installed on the exhaust pipe, and a flow meter is installed on the exhaust pipe.

[0007] Preferably, the control system body receives instrument monitoring signals and transmits equipment drive signals via cables.

[0008] Preferably, the exhaust port is connected to the exhaust pipe.

[0009] Preferably, the electric valve is located above the flow meter.

[0010] Preferably, the flow meter, electric valve, and motor are all connected to the control system body.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The control system receives instrument monitoring signals and transmits equipment drive signals via cables. The level gauge, flow meter, electric valve, and motor are all connected to the control system. The control system automatically vents air while the centrifugal pump is started, eliminating the need for on-site manual assistance, reducing labor intensity, optimizing job configuration, ensuring the normal start-up of the centrifugal pump, reducing the failure rate of the centrifugal pump, and improving the level of production intelligence and work efficiency. Attached Figure Description

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0014] Figure 1 Schematic diagram of the automated control system for starting and venting a centrifugal pump;

[0015] Figure 2 This is a PLC control flowchart.

[0016] Legend: 1. Motor; 2. Centrifugal pump body; 3. Exhaust port; 4. Flow meter; 5. Exhaust pipe; 6. Electric valve; 7. Control system body. Detailed Implementation

[0017] This application provides an automated control system for centrifugal pump start-up and venting. This effectively solves the problem of existing centrifugal pump venting methods that require on-site personnel to open the vent valve, confirm continuous water flow, and then manually close it. This traditional method is time-consuming and labor-intensive, and may result in incomplete venting of gas within the pump. In emergencies requiring rapid pump start-up, this method wastes valuable time and causes additional losses. The control system receives instrument monitoring signals and transmits equipment drive signals via cables. Level gauges, flow meters, electric valves, and motors are all connected to the control system. The system automatically vents gas simultaneously with the centrifugal pump start-up, eliminating the need for on-site manual intervention, reducing labor intensity, optimizing job allocation, ensuring normal pump start-up, reducing pump failure rates, and improving production intelligence and work efficiency. Example

[0018] like Figure 1 and Figure 2As shown, the technical solution in this application embodiment effectively solves the problem that existing centrifugal pump exhaust requires on-site operation by personnel to open the exhaust valve, confirm that water is flowing out continuously, and then manually close it. This traditional method is time-consuming and labor-intensive, and may result in the pump not being emptied. When an emergency occurs and the centrifugal pump needs to be started quickly, the existing method will waste valuable time and cause additional losses. The overall idea is as follows: an automated control system for starting and exhausting a centrifugal pump, including a motor 1, a centrifugal pump body 2, an exhaust pipe 5, and a control system body 7. According to the production situation, the operators in the central control room can start or stop the motor 1 and the centrifugal pump body 2 through the control system body 7.

[0019] The centrifugal pump body 2 is provided with an exhaust port 3 on the top, an electric valve 6 is installed on the exhaust pipe 5, and a flow meter 4 is installed on the exhaust pipe 5. The flow meter 4 installed on the exhaust pipe 5 is a differential pressure type. The monitoring signal of the flow meter 4 is transmitted to the control system body 7 through a signal line. The control system body 7 sets the upper limit of the flow rate at which the electric valve 6 is closed.

[0020] The control system body 7 receives instrument monitoring signals and transmits equipment drive signals via cables. The exhaust port 3 is connected to the exhaust pipe 5. The electric valve 6 is located above the flow meter 4. The flow meter 4, electric valve 6, and motor 1 are all connected to the control system body 7. The control system determines whether to close the electric valve 6 based on the monitored value. The electric valve 6 is designed above the flow meter 4. The drive signal of the electric valve 6 is connected to the control system body 7 via a cable to realize the timely opening and closing of the electric valve 6. The drive signal of the motor 1 is connected to the control system body 7 via a cable. The motor 1 drives the centrifugal pump body 2 to operate via a coupling.

[0021] To address the problems existing in the prior art, this utility model provides an automated control system for the start-up and venting of a centrifugal pump. The control system body 7 receives instrument monitoring signals and transmits equipment drive signals via cables. The level gauge, flow meter 4, electric valve 6, and motor 1 are all connected to the control system body 7. The control system body 7 automatically vents air while the centrifugal pump body 2 is started, eliminating the need for manual on-site assistance, reducing labor intensity, optimizing job configuration, ensuring the normal start-up of the centrifugal pump body 2, reducing the failure rate of the centrifugal pump, and improving the level of production intelligence and work efficiency.

[0022] Working principle:

[0023] The first step involves the operators in the central control room starting or stopping the motor 1 and the centrifugal pump body 2 via the control system body 7, depending on the production situation. The flow meter 4 installed on the exhaust pipe 5 is a differential pressure type. The monitoring signal of the flow meter 4 is transmitted to the control system body 7 via a signal line. The upper limit of the flow rate at which the electric valve 6 is closed is set in the control system body 7. The control system body 7 determines whether to close the electric valve 6 based on the monitoring value. The electric valve 6 is designed above the flow meter 4. The drive signal of the electric valve 6 is connected to the control system body 7 via a cable, enabling the electric valve 6 to open and close in a timely manner. The drive signal of the motor 1 is connected to the control system body 7 via a cable. The motor 1 drives the centrifugal pump body 2 to operate via a coupling.

[0024] The second step, the PLC control process, is as follows: After the control system body 7 receives the start signal, it sends a start command to the motor 1. The motor 1 runs and drives the centrifugal pump body 2 to work. Three seconds after the motor 1 starts, the control system body 7 opens the electric valve 6. The centrifugal pump body 2 automatically exhausts gas through the top exhaust pipe 5. The control system body 7 sets the upper limit of the flow rate at which the electric valve 6 closes. The flow meter 4 feeds back the flow rate data of the liquid passing through the exhaust pipe 5 to the control system body 7 in real time. When the data fed back by the flow meter 4 is higher than the set upper limit and the duration exceeds thirty seconds, the control system body 7 determines that the pump body is vented and sends a command to close the electric valve 6. The electric valve 6 closes, and the centrifugal pump body 2 completes the venting.

[0025] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A centrifugal pump start-up exhaust automation control system comprising a motor (1), a centrifugal pump body (2), an exhaust pipe (5) and a control system body (7), characterized in that, The centrifugal pump body (2) top is provided with exhaust port (3), the exhaust pipe (5) is installed with electric valve (6), the exhaust pipe (5) is installed with flowmeter (4).

2. A centrifugal pump start-up venting automation control system as claimed in claim 1, wherein, The control system body (7) receives instrument monitoring signal and transmission equipment driving signal through cable.

3. A centrifugal pump start-up venting automation control system as claimed in claim 1, wherein, The exhaust port (3) is connected with exhaust pipe (5).

4. A centrifugal pump start-up venting automation control system as claimed in claim 1, wherein, The electric valve (6) is above the flowmeter (4).

5. A centrifugal pump start-up venting automation control system as claimed in claim 1, wherein, The flowmeter (4), electric valve (6) and motor (1) are connected with control system body (7).

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