Simple and practical waste heat power station alternating current oil pump self-starting system

Abstract

The utility model relates to an oil pump technology, and discloses a simple and practical alternating current oil pump self-starting system of a waste heat power station, which is characterized in that a power station self-use power supply is connected to the input end of a controller I, a public network power supply is connected to the input end of a controller II, the output end of the controller I is connected with an oil pump start-stop unit, the original control function is not changed, and the output end of the controller II is connected to an oil pump; when a power failure accident occurs in a power station, the first input end of the controller loses power, the automatic detection unit detects that a circuit is disconnected, the self-backup power supply controller automatically skips to disconnect the first input end of the controller and connect the second input end of the controller, and the oil pump starting and stopping unit stops starting and stopping. The oil pump motor is directly started to lubricate the steam turbine until the power of the power station self-use power supply is recovered, and when the power of the power station self-use power supply is recovered, the self-supply switching power supply controller automatically cuts off the second input end of the controller and jumps to recover to connect the first input end of the controller, and the original control function of the oil pump motor is recovered to be normal.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, and more specifically, particularly to a simple and practical self-starting system for an AC oil pump of a waste heat power station. Background Art

[0002] The lubricating oil pumps for the bearings of the steam turbines in the waste heat power station of the cement plant include AC oil pumps and DC oil pumps (emergency oil pumps). When the steam turbine is starting or stopping, it relies on the AC oil pump for oil lubrication. After the normal operation of the steam turbine (3000 rpm), the oil pump stops and relies on self-rotation to drive oil lubrication. When an abnormal condition occurs in the power station, causing the power station power generation line and the public network line to trip and disconnect, the power station system loses power, and the steam turbine will shut down urgently and stop by inertia. At this time, the emergency oil pump will rely on the battery as power to automatically start and provide necessary lubrication for the steam turbine. The inertia of the steam turbine is large, and it takes a long time to rotate from 3000 to a stationary state. In practice, the battery power has been consumed before the inertia of the steam turbine drops to a certain low speed, and the emergency oil pump can no longer provide lubrication. Such a situation is very likely to cause an accident of straining the bearing. In order to solve the problem of the turbine oil shortage and bearing strain caused by insufficient battery capacity when the contact switch between the power generation and the public network line suddenly trips, a simple and practical waste heat power station AC oil pump self-starting system is designed. Utility Model Content

[0003] The present application provides a simple and practical waste heat power station AC oil pump self-starting system, which solves the problem of turbine oil shortage and pull-out failure caused by insufficient battery capacity when a sudden tripping accident of the connecting switch between the power generation and the public network occurs.

[0004] The present application provides a simple and practical self-starting system for an AC oil pump in a waste heat power station, comprising a self-provided power supply controller, wherein the self-provided power supply controller is connected to a power supply for use by the power station through a first input terminal of the controller, the self-provided power supply controller is connected to an oil pump start-stop unit through a first output terminal of the controller, the oil pump start-stop unit is connected to an oil pump motor through a power cable, an automatic detection unit is provided between the oil pump start-stop unit and the oil pump motor, an automatic detection control switch is installed on the automatic detection unit, the self-provided power supply controller is connected to a public power supply through a second input terminal of the controller, the self-provided power supply controller is connected to the oil pump motor through a second output terminal of the controller, a voltage stabilizer is installed on the power cables between the power supply for use by the power station and the first input terminal of the controller, and between the public power supply and the second input terminal of the controller, and an overload protector is installed on the power cables between the first output terminal of the controller and the oil pump start-stop unit, and between the second output terminal of the controller and the oil pump motor.

[0005] Preferably, the controller input terminal No. 1 and the power station's own power supply, the controller output terminal No. 1 and the oil pump start and stop unit, the controller input terminal No. 2 and the public power supply, and the controller output terminal No. 2 and the oil pump motor are all connected through the power cable.

[0006] Preferably, the self-contained power supply controller is provided with a voltage detection unit, and the voltage detection unit is a Chint dual-power switch voltage transformer.

[0007] Preferably, a temperature sensor is provided on the self-contained power supply controller.

[0008] Preferably, the self-contained power supply controller is provided with an alarm, and the alarm is an audible and visual alarm.

[0009] Preferably, a display is provided on the self-contained power supply controller.

[0010] It can be seen from the above technical solutions that the present application provides a simple and practical waste heat power station AC oil pump self-starting system, which consists of a self-contained power supply controller, power cables, and an oil pump start-stop unit. It is installed in the control room of the power station for the convenience of inspection by the staff. The power supply of the power station is connected to the No. 1 input terminal of the controller, and the public power supply is connected to the No. 2 input terminal of the controller. The No. 1 output terminal of the controller is connected to the original oil pump start and stop unit. The original control function remains unchanged. The No. 2 output terminal of the controller is directly connected to the oil pump motor. The self-provided power supply controller has the priority to connect to the No. 1 input terminal of the controller. At this time, the No. 1 input terminal of the controller is in the connected state, and the original function of the oil pump start and stop unit remains unchanged. When a power outage occurs in the power station, the No. 1 input terminal of the controller loses power, and the automatic detection unit detects that the circuit is disconnected, and quickly opens the automatic detection control switch. The self-provided power supply controller automatically jumps to disconnect the No. 1 input terminal of the controller and connects the No. 2 input terminal of the controller, directly starting the oil pump motor to provide lubrication for the turbine until the power supply of the power station is restored. When the power supply of the power station is restored, the self-provided power supply controller automatically cuts off the No. 2 input terminal of the controller and jumps back to connect the No. 1 input terminal of the controller, and the original control function of the oil pump motor returns to normal.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model is composed of a self-contained power supply controller, a power cable, and an oil pump start-stop control unit. The self-contained power supply controller is connected to two power sources, the power station's own power supply and the public power supply. When both power sources have power, the self-contained power supply controller is set to give priority to connecting to the power station's own power supply side, and the oil pump motor uses the power station's own power supply. When the power supply on the power station's own power supply side disappears, the self-contained power supply controller will automatically switch to connect to the public power supply side. At this time, the oil pump motor uses the public power supply, and the oil pump motor will automatically start to provide lubrication.

[0013] 2. When a tripping accident occurs, the automatic detection unit of the utility model detects that the circuit is disconnected, quickly opens the automatic detection control switch, and the self-contained power supply controller automatically jumps to disconnect the controller input terminal No. 1 and connects the controller input terminal No. 2. The AC oil pump can be automatically started to provide lubrication for the turbine, avoiding the occurrence of a pull-out accident due to insufficient battery power.

[0014] In summary, a simple and practical waste heat power station AC oil pump self-starting system is composed of a self-contained power supply controller, a power cable, and an oil pump start-stop control unit. The self-contained power supply controller is connected to the power station's own power supply and the public power supply. When both power supplies have power, the self-contained power supply controller is set to give priority to connecting to the power station's own power supply side, and the oil pump motor uses the power station's own power supply. When the power supply on the power station's own power supply side disappears, the self-contained power supply controller will automatically switch to connect to the public power supply side. At this time, the oil pump motor uses the public power supply, and the oil pump motor will automatically start to provide lubrication. In the event of a tripping accident, the automatic detection unit detects that the circuit is disconnected, quickly opens the automatic detection control switch, and the self-contained power supply controller automatically jumps to disconnect the controller's No. 1 input terminal and connects the controller's No. 2 input terminal. The AC oil pump can be automatically started to provide lubrication for the turbine, avoiding a pull-out accident due to insufficient battery power. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0016] Figure 1 A schematic diagram of a simple and practical waste heat power station AC oil pump self-starting system provided by the utility model;

[0017] Figure 2 The utility model provides a simple and practical waste heat power station AC oil pump self-starting system.

[0018] The reference numerals in the specific implementation manner are as follows:

[0019] 1. Self-contained power supply controller; 2. Oil pump motor; 3. Oil pump start and stop unit; 4. Controller input terminal No. 1; 5. Controller input terminal No. 2; 6. Controller output terminal No. 1; 7. Controller output terminal No. 2; 8. Power supply for power station; 9. Public power supply; 10. Automatic detection unit; 11. Automatic detection control switch; 12. Power cable; 13. Voltage detection unit; 14. Temperature sensor; 15. Alarm; 16. Display; 17. Voltage stabilizer; 18. Overload protector. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0021] See also Figure 1-2 , a simple and practical waste heat power station AC oil pump self-starting system, in order to solve the problem of the failure of the steam turbine to lack oil and pull the wagon due to insufficient battery capacity when the connecting switch between the power generation and the public network line suddenly trips, this application proposes a simple and practical waste heat power station AC oil pump self-starting system, which consists of a self-provided power supply controller, a power cable, and an oil pump start-stop control unit. The self-provided power supply controller is connected to the power station's own power supply and the public network power supply. When both power supplies have power, the self-provided power supply controller is set to give priority to connecting to the power station's own power supply side, and the oil pump motor uses the power station's own power supply. When the power supply on the power station's own power supply side disappears, the self-provided power supply controller will automatically switch to connect to the public network power supply side. At this time, the oil pump motor uses the public network power supply, and the oil pump motor will automatically start to provide lubrication. When a tripping accident occurs, the automatic detection unit detects that the circuit is disconnected, quickly opens the automatic detection control switch, and the self-provided power supply controller automatically jumps to disconnect the controller's No. 1 input terminal and connects the controller's No. 2 input terminal, which can automatically start the AC oil pump to provide lubrication for the steam turbine, avoiding the occurrence of pull wagon accidents due to insufficient battery power.

[0022] Specifically, a simple and practical waste heat power station AC oil pump self-starting system includes a self-provided power supply controller 1, the self-provided power supply controller 1 is provided with a voltage detection unit 13, the voltage detection unit 13 is a Chint dual power switch voltage transformer, which is used to monitor the voltage of the self-provided power supply controller 1, and the self-provided power supply controller 1 is provided with a temperature sensor 14, an alarm 15 and a display 16, the alarm 15 is an audible and visual alarm, the temperature sensor 14 is used to detect the working temperature of the self-provided power supply controller 1, and the alarm 15 adopts an audible and visual alarm, which is convenient for reminding the staff when a fault occurs; the self-provided power supply controller 1 is connected to the controller through the controller input terminal 4 There is a power station's own power supply 8, the self-provided power supply controller 1 is connected to the oil pump start-stop unit 3 through the controller's No. 1 output terminal 6, the oil pump start-stop unit 3 is connected to the oil pump motor 2 through the power cable 12, the power station's own power supply 8 is connected to the controller's No. 1 input terminal 4, the public network power supply 9 is connected to the controller's No. 2 input terminal 5, the controller's No. 1 output terminal 6 is connected to the original oil pump start-stop unit 3, the original control function remains unchanged, the controller's No. 2 output terminal 7 is directly connected to the oil pump motor 2, the self-provided power supply controller 1 has the priority to connect to the controller's No. 1 input terminal 4, at this time the controller's No. 1 input terminal 4 is in the connected state, the original function of the oil pump start-stop unit 3 remains unchanged, when a power outage occurs in the power station, the controller No. 1 input terminal 4 is in the connected state, the original function of the oil pump start-stop unit 3 remains unchanged, and ... the controller No. 1 input terminal 4 is in the connected state, the original function of the oil pump start-stop unit 3 remains unchanged, and the controller No. 1 input terminal 4 is in the connected state, the original function of the oil pump start-stop unit 3 remains unchanged, and the controller No. 1 input terminal 4 is in the connected state, the original function of the When the No. 1 input terminal 4 loses power, the automatic detection unit 10 detects that the circuit is disconnected, quickly opens the automatic detection control switch 11, and the self-provided power supply controller 1 automatically jumps to disconnect the controller No. 1 input terminal 4 and connects the controller No. 2 input terminal 5, directly starting the oil pump motor 2 to provide lubrication for the steam turbine until the power supply 8 of the power station is restored. When the power supply 8 of the power station is restored, the self-provided power supply controller 1 automatically cuts off the controller No. 2 input terminal 5 and jumps to restore the connection to the controller No. 1 input terminal 4, and the original control function of the oil pump motor 2 is restored to normal; an automatic detection unit 10 is provided between the oil pump start-stop unit 3 and the oil pump motor 2, and an automatic detection control switch is installed on the automatic detection unit 10 11. The self-provided power supply controller 1 is connected to the public power supply 9 through the controller No. 2 input terminal 5. The self-provided power supply controller 1 is connected to the oil pump motor 2 through the controller No. 2 output terminal 7. The power cables 12 between the power station's own power supply 8 and the controller No. 1 input terminal 4, the public power supply 9 and the controller No. 2 input terminal 5 are all installed with voltage stabilizers 17 to avoid affecting normal operation due to unstable power transmission. The power cables 12 between the controller No. 1 output terminal 6 and the oil pump start-stop unit 3, the controller No. 2 output terminal 7 and the oil pump motor 2 are all installed with overload protectors 18. When the output current of the power supply exceeds the rated current, the overload protection will be triggered to ensure the normal operation of the operation;The controller No. 1 input terminal 4 and the power station's own power supply 8, the controller No. 1 output terminal 6 and the oil pump start-stop unit 3, the controller No. 2 input terminal 5 and the public power supply 9, and the controller No. 2 output terminal 7 and the oil pump motor 2 are all connected through power cables 12. When a tripping accident occurs, the automatic detection unit 10 detects that the circuit is disconnected, quickly opens the automatic detection control switch 11, and the self-provided power supply controller 1 automatically jumps to disconnect the controller No. 1 input terminal 4 and connects the controller No. 2 input terminal 5. The AC oil pump can be automatically started to provide lubrication for the steam turbine to avoid the occurrence of a pull-out accident due to insufficient battery power. The self-provided power supply controller 1 is connected to the power station's own power supply 8 and the public power supply 9. When both power supplies are powered, the self-provided power supply controller 1 is set to preferentially connect to the power station's own power supply 8 side, and the oil pump motor 2 uses the power station's own power supply 8. When the power supply on the power station's own power supply 8 side disappears, the self-provided power supply controller 1 will automatically switch to connect to the public power supply 9 side. At this time, the oil pump motor 2 uses the public power supply 9, and the oil pump motor 2 will automatically start to provide lubrication. ;

[0023] It can be seen from the above technical solution that a simple and practical waste heat power station AC oil pump self-starting system is provided, which is composed of a self-contained power supply controller 1, a power cable 12, and an oil pump start-stop unit 3. It is installed in the control room of the power station for the convenience of inspection by the staff. The power station's own power supply 8 is connected to the controller's No. 1 input terminal 4, the public network power supply 9 is connected to the controller's No. 2 input terminal 5, the controller's No. 1 output terminal 6 is connected to the original oil pump start-stop unit 3, and the original control function remains unchanged. The controller's No. 2 output terminal 7 is directly connected to the oil pump motor 2. The self-provided power supply controller 1 has priority to connect to the controller's No. 1 input terminal 4. At this time, the controller's No. 1 input terminal 4 is in the connected state, and the original function of the oil pump start-stop unit 3 remains unchanged. When a power outage occurs in the power station, the controller's No. 1 input terminal 4 loses power, the automatic detection unit 10 detects that the circuit is disconnected, and quickly opens the automatic detection control switch 11. The self-provided power supply controller 1 automatically jumps to disconnect the controller's No. 1 input terminal 4 and connects the controller's No. 2 input terminal 5, directly starting the oil pump motor 2 to provide lubrication for the turbine until the power of the power station's own power supply 8 is restored. When the power of the power station's own power supply 8 is restored, the self-provided power supply controller 1 automatically cuts off the controller's No. 2 input terminal 5 and jumps back to connect the controller's No. 1 input terminal 4, and the original control function of the oil pump motor 2 returns to normal.

[0024] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the application disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art disclosed by the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0025] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A simple and practical waste heat power station AC oil pump self-starting system, characterized by: The invention comprises a self-contained power supply controller (1), wherein the self-contained power supply controller (1) is connected to a power station's own power supply (8) via a controller No. 1 input terminal (4), the self-contained power supply controller (1) is connected to an oil pump start / stop unit (3) via a controller No. 1 output terminal (6), the oil pump start / stop unit (3) is connected to an oil pump motor (2) via a power cable (12), an automatic detection unit (10) is provided between the oil pump start / stop unit (3) and the oil pump motor (2), an automatic detection control switch (11) is installed on the automatic detection unit (10), and the self-contained power supply controller (1) is connected to an oil pump start / stop unit (3) via a controller No. 2 output terminal (6). The first input terminal (5) of the power station is connected to a public power supply (9); the self-contained power supply controller (1) is connected to the oil pump motor (2) via the second output terminal (7) of the controller; a voltage stabilizer (17) is installed on the power cable (12) between the power station's own power supply (8) and the first input terminal (4) of the controller, and between the public power supply (9) and the second input terminal (5) of the controller; an overload protector (18) is installed on the power cable (12) between the first output terminal (6) of the controller and the oil pump start-stop unit (3), and between the second output terminal (7) of the controller and the oil pump motor (2).

2. According to claim 1, a simple and practical waste heat power station AC oil pump self-starting system is characterized by: The controller No. 1 input terminal (4) and the power station's own power supply (8), the controller No. 1 output terminal (6) and the oil pump start / stop unit (3), the controller No. 2 input terminal (5) and the public grid power supply (9), and the controller No. 2 output terminal (7) and the oil pump motor (2) are all connected via the power cable (12).

3. According to the simple and practical waste heat power station AC oil pump self-starting system of claim 1, it is characterized by: The self-contained power supply controller (1) is provided with a voltage detection unit (13), and the voltage detection unit (13) is a Chint dual-power switch voltage transformer.

4. According to claim 1, a simple and practical waste heat power station AC oil pump self-starting system is characterized by: The self-contained power supply controller (1) is provided with a temperature sensor (14).

5. According to claim 1, a simple and practical waste heat power station AC oil pump self-starting system is characterized by: The self-contained power supply controller (1) is provided with an alarm (15), and the alarm (15) is an audible and visual alarm.

6. According to claim 1, a simple and practical waste heat power station AC oil pump self-starting system is characterized by: The self-contained power supply controller (1) is provided with a display (16).

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