Frequency conversion speed regulation flow control device of elevator lubrication station

Abstract

The utility model discloses an elevator lubrication station frequency conversion speed regulation flow control device which comprises a lubrication station, the lubrication station is connected with a speed reducer through a lubricating oil pipeline, the lubrication station comprises an oil tank, and a gear oil pump, a safety valve, a motor, a one-way valve, an electric contact thermometer, an electric heater, a gate valve and a liquid level meter are installed on the oil tank. A return oil filter is installed in the oil tank, an air filter located above the return oil filter is installed on the oil tank, the safety valve extends into the oil tank through a lubricating oil pipeline, the oil tank is connected with the electric contact pressure gauge through the lubricating oil pipeline, and a gear oil pump penetrating out of the oil tank is installed on the motor. The gear oil pump is connected with a paper oil filter through a one-way valve, the oil tank is connected with the cooler through a lubricating oil pipeline, the motor is electrically connected with a variable-frequency speed regulation device with a flow closed loop, the variable-frequency speed regulation device is electrically connected with a PLC, and the PLC is electrically connected with an intelligent control instrument. Flow closed-loop regulation is achieved, and safe operation of the speed reducer is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mine machinery technical field, specifically a hoist lubrication station frequency control flow control device. BACKGROUND

[0002] The reducer is one of main components in mine hoist transmission system, and the lubrication station is a matched component of the reducer, the lubrication system is provided with the pipeline connected with the reducer, and the operation of the reducer cannot be separated from the circulation heat exchange of the lubrication system.

[0003] The lubrication station is completed by cooperation of the machinery and the electric control, and the electric control system is particularly important. With the development of the alternating current frequency conversion technology, the frequency converter is applied more and more widely in the motor drag occasion, in addition to the excellent starting performance of frequency conversion, the alternating current frequency converter technology makes the continuous regulation of target quantity more convenient, when the frequency converter fails, the system is automatically switched to the power frequency operation state, if the fault is removed after fault reset, the system is automatically returned to the frequency conversion operation state. In order to adapt to the urgent needs of current mine safety production and the needs of intelligent detection control of mine safety production, the lubrication system needs to be improved. CONTENT OF UTILITY MODEL

[0004] The utility model discloses in order to solve the problem of reducer lubrication flow closed loop regulation, provides a hoist lubrication station frequency control flow control device. The hoist lubrication system can be more reasonable, and the reducer operation is reliable, prolongs its service life. Through the lubrication station increases pressure sensor, temperature sensor and flow sensor and realizes the function of real time monitoring, provides the guarantee condition for intelligent mine engineering. And the frequency control system is applied to the drive of lubrication system gear oil pump, realizes the flow closed loop regulation of lubrication system, to ensure the safe operation of hoist reducer. Make the lubrication, heat dissipation and cleaning function of the reducer requirement get exactly guarantee.

[0005] The utility model is adopted as follows technical scheme realizes:

[0006] The application discloses a frequency conversion speed regulation flow control device of a hoist lubricating station, which comprises a lubricating station 20 connected with a reducer 19 through a lubricating oil pipeline, wherein the lubricating station comprises an oil tank 9, a gear oil pump 3, a safety valve 4, an electric motor 5, a one-way valve 6, an electric contact thermometer 12, an electric heater 13, a gate valve 14 and a liquid level meter 15 which are arranged on the oil tank 9, a back oil filter 1 arranged in the oil tank 9, an air filter 2 arranged above the back oil filter 1, the safety valve 4 extending into the oil tank 9 through the lubricating oil pipeline, the oil tank 9 connected with an electric contact pressure gauge 10 provided with a pressure gauge switch 11 through the lubricating oil pipeline, the gear oil pump 3 penetrating into the oil tank 9 and provided with the electric motor 5, the gear oil pump 3 connected with a paper filter 8 through the one-way valve 6, and the oil tank 9 connected with a cooler 7 through the lubricating oil pipeline; the electric motor 5 is electrically connected with a frequency conversion speed regulation device for flow closed loop regulation, the frequency conversion speed regulation device is electrically connected with a PLC controller 24, and the PLC controller is electrically connected with an intelligent control instrument.

[0007] Preferably, the lubricating oil pipeline comprises an oil outlet pipeline 21 and a back oil pipeline 22, the oil outlet pipeline is connected between the gate valve 14 on the oil tank 9 and a gear box of the reducer 19, one end of the back oil pipeline 22 is welded to a back oil port of the reducer 19, and the other end of the back oil pipeline 22 is connected to a back oil hole 26 in a side wall of the lubricating station, so that lubricating oil flows back to the lubricating station through the back oil pipeline.

[0008] Preferably, the frequency conversion speed regulation device comprises a frequency converter 25 connected with the electric motor 5, the frequency converter 25 and the electric motor 5 are sequentially electrically connected with a second AC contactor 2KM, a thermal relay FR and a change-over switch HK, the frequency converter BPQ is electrically connected with a three-phase power supply through a first AC contactor 1KM and a first miniature circuit breaker 1QM, the first miniature circuit breaker, the first AC contactor, the frequency converter, the second AC contactor, the thermal relay and the change-over switch form a frequency conversion driving system, when the frequency conversion driving system fails, the frequency converter main circuit is switched to a working frequency driving system operation state, and after the fault is reset, if the fault is removed, the frequency converter main circuit returns to a frequency conversion operation state.

[0009] Preferably, an analog quantity input end of the frequency converter is connected with the PLC controller.

[0010] Preferably, the frequency converter is of AD300 type.

[0011] Preferably, the working frequency driving system comprises the first miniature circuit breaker 1QM connected with a three-phase power supply, the first miniature circuit breaker 1QM electrically connected with the second AC contactor 2KM through a third AC contactor 3KM, and the second AC contactor 2KM electrically connected with the electric motor 5 through the thermal relay FR and the change-over switch HK.

[0012] Preferably, the PLC controller 24 comprises a main module and an extension module, the main module and the extension module are connected with the digitized socket CZ in parallel, the input end of the main module is connected with the intelligent control instrument for monitoring the flow, the pressure being too low or too high and the temperature being too low or too high, the output end of the main module is connected with the power relay of the frequency converter, the forward rotation relay of the frequency converter, the power frequency operation relay, the fault relay and the fault reset relay; the analog output end of the extension module is connected with the analog input end of the frequency converter.

[0013] Preferably, the intelligent control instrument comprises a pressure sensor 17 for collecting the lubricating oil pressure, a flow sensor 18 for collecting the lubricating oil flow and a temperature sensor 16 for collecting the lubricating oil temperature, the pressure sensor 17 and the flow sensor 18 are installed on the oil tank 9 through the lubricating oil pipeline, and the temperature sensor 16 is installed on the top cover of the oil tank; the flow signal, the pressure signal and the temperature signal of the lubricating oil and other switch quantity signals are fed back to the real-time monitoring PLC controller.

[0014] Compared with the prior art, the utility model has the advantages of the following:

[0015] 1. The frequency converter and the module are used in the lubricating system, and the oil supply of the lubricating system of the elevator can be controlled in constant current. 2. The pressure, the temperature and the flow of the lubricating system are fed back to the real-time monitoring PLC controller of the elevator in real time and on line. 3. The frequency drive system and the power frequency drive system can realize dynamic switching. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole schematic view of the frequency speed regulation flow control device of the elevator lubricating station of the utility model;

[0017] Figure 2 It is the lubricating station schematic view of the frequency speed regulation flow control device of the elevator lubricating station of the utility model;

[0018] Figure 3 It is the lubricating station side view schematic view of the frequency speed regulation flow control device of the elevator lubricating station of the utility model.

[0019] Figure 4 It is the lubricating principle view of the frequency speed regulation flow control device of the elevator lubricating station of the utility model;

[0020] Figure 5 It is the frequency converter main circuit schematic view of the frequency speed regulation flow control device of the elevator lubricating station of the utility model.

[0021] Figure 6 The power supply schematic view of the control unit with the PLC controller of the elevator lubrication station variable frequency speed regulation flow control device of the utility model;

[0022] Figure 7 The PLC controller structure schematic view of the elevator lubrication station variable frequency speed regulation flow control device of the utility model;

[0023] Figure 8 The flow sensor schematic view of the elevator lubrication station variable frequency speed regulation flow control device of the utility model;

[0024] Figure 9 The another flow sensor schematic view of the elevator lubrication station variable frequency speed regulation flow control device of the utility model;

[0025] Figure 10 The temperature sensor schematic view of the elevator lubrication station variable frequency speed regulation flow control device of the utility model;

[0026] Figure 11 The pressure sensor schematic view of the elevator lubrication station variable frequency speed regulation flow control device of the utility model;

[0027] Figure 12 The work flow chart of the elevator lubrication station variable frequency speed regulation flow control device of the utility model. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the embodiment of the present application provides a hoist lubrication station variable frequency speed regulation flow control device, comprising: a lubrication station 20, the lubrication station 20 is connected with a reducer 19 through a lubricating oil pipeline, the lubrication station comprises an oil tank 9, the oil tank 9 is provided with a gear oil pump 3, a safety valve 4, a motor 5, a check valve 6, an electric contact thermometer 12, an electric heater 13, a gate valve 14 and a liquid level meter 15, the oil tank 9 is provided with an oil return filter 1, the oil tank 9 is provided with an air cleaner 2 above the oil return filter 1, the safety valve 4 extends into the oil tank through the lubricating oil pipeline, the oil tank 9 is connected with an electric contact pressure gauge 10 provided with a pressure gauge switch 11 through the lubricating oil pipeline, the gear oil pump 3 penetrating into the oil tank 9 is provided with the motor 5, the gear oil pump 3 is connected with a paper filter 8 through the check valve 6, the oil tank 9 is connected with a cooler 7 through the lubricating oil pipeline, and the cooler 7 is used for cooling the lubricating oil; the motor 5 is electrically connected with a variable frequency speed regulation device for flow closed loop regulation, the variable frequency speed regulation device is electrically connected with a PLC controller 24( Figure 5 ), and the PLC controller is electrically connected with an intelligent control instrument.

[0030] Preferably, as shown in Figure 2 、 Figure 3 , the lubricating oil pipeline comprises an oil outlet pipeline 21 and an oil return pipeline 22, the oil outlet pipeline is connected between the gate valve 14 on the oil tank 9 and the gear box of the reducer 19, and the lubricating oil is sprayed onto the gear of the reducer 19; one end of the oil return pipeline 22 is welded to the oil return port of the reducer 19, and the other end of the oil return pipeline 22 is connected to an oil return hole 26 in the side wall of the lubrication station 20, the lubricating oil flows back to the lubrication station through the oil return pipeline, is treated by filtering and the like, and then enters the oil tank for use; the reducer 19 is installed on a floor 23 higher than the lubrication station, so that the lubricating oil can flow back by gravity.

[0031] The lubrication station is used in cooperation with the reducer (i.e. main machine), and the gear oil pump of the lubrication station is started before the start of the main machine. After the lubrication station works normally, the main machine can be started. In order to improve the cleanliness of the lubricating oil, an oil return filter 1 is arranged at the inlet of the oil tank, and a paper filter 8 is arranged at the oil outlet of the gear oil pump 3. The paper filter 8 is provided with a differential pressure signaling device, and when the filter core is blocked and the pressure difference between the inlet and outlet is 0.35 MPa, an electric signal is sent. At this time, the filter core should be cleaned or replaced. The lubrication station adopts two sets of oil pump devices, which include the gear oil pump 3, the motor 5 and the one-way valve 6. One set of oil pump device works while the other set of oil pump device is standby, and they can be switched with each other. The pressure of the lubrication station is obtained by adjusting the safety valve 4, and the safety valve discharges oil when the pressure exceeds the set pressure, thereby playing a protection role. At the same time, the electric contact pressure gauge 10 of the lubrication station is interlocked with the motor 5 of the gear oil pump 3, and when the oil pressure exceeds 0.6 MPa, the electric contact pressure gauge 10 is actuated, and the motor is powered off, thereby also playing a pressure protection role. The cooler 7 is arranged in the lubrication station, the working oil temperature is 20-50℃, and when the oil temperature rises to 50℃, the electric contact thermometer 12 sends a signal to make the cooler 7 work (open and close the corresponding valve). Similarly, when the oil temperature is lower than 20℃, the electric contact thermometer 12 sends a signal, and the electric contact thermometer 12 is interlocked to connect the power supply of the electric heater 13, so that the electric heater 13 works. When the lowest allowable oil temperature 20℃ is reached, the power supply is cut off. In order to ensure the normal work of the system, the air filter 2 is arranged on the top cover of the oil tank 9, which can filter the dust and impurities in the air.

[0032] Preferably, as shown in Figure 5 The frequency conversion speed regulation device includes a frequency converter 25 connected with the motor, the frequency converter 25 is electrically connected with a second AC contactor 2KM, a thermal relay FR, a switch HK and the motor 5 in sequence, and the frequency converter BPQ is electrically connected with a three-phase power supply through a first AC contactor 1KM and a first small circuit breaker 1QM; the first small circuit breaker, the first AC contactor, the frequency converter, the second AC contactor, the thermal relay and the switch HK form a frequency conversion driving system; when a fault occurs in the frequency conversion driving system, the frequency converter main circuit is switched to the operation state of the power frequency driving system, and if the fault is removed after the fault reset, the frequency converter main circuit returns to the frequency conversion operation state. The frequency converter main circuit can realize the dynamic switching of the frequency conversion driving system and the power frequency driving system, which can ensure the safe production and smooth work, and avoid the equipment accident shutdown.

[0033] Preferably, the analog input end of the frequency converter is connected with a PLC controller 24, the analog input end of the frequency converter is connected with a fault reset and forward rotation start / stop, and the output end of the frequency converter is connected with a fault output and a frequency output. The type of the frequency converter is AD300, and the specific frequency converter model is AD300-T45R5GB / 7R5PB.

[0034] Preferably, the power frequency drive system includes a first miniature circuit breaker 1QM connected to a three-phase power supply. The first miniature circuit breaker is electrically connected to a second AC contactor 2KM via a third AC contactor 3KM. The second AC contactor is electrically connected to a motor 5 via a thermal relay FR and a changeover switch HK.

[0035] Preferred, such as Figure 6 , Figure 7 As shown, the PLC controller 24 includes a main module and an expansion module. The main module and expansion module are connected in parallel with the modular socket CZ. The input terminal of the main module is connected to an intelligent controller that monitors flow rate, pressure (too low or too high), and temperature (too high or too low). The output terminal of the main module is connected to a frequency converter power relay, a frequency converter forward operation relay, a power frequency operation relay, a fault relay, and a fault reset relay. The analog output terminal of the expansion module is connected to the analog input terminal of the frequency converter. The PLC controller is electrically connected to a second fuse 2FU. The main module, auxiliary modules, and relay auxiliary control of the PLC controller are installed in the same control cabinet.

[0036] Preferred, such as Figures 8-11 As shown, the intelligent controller includes a pressure sensor 17 for collecting lubricating oil pressure, a flow sensor 18 for collecting lubricating oil flow rate, and a temperature sensor 16 for collecting lubricating oil temperature. The pressure sensor 17 and flow sensor 18 are installed in the oil tank 9 via lubricating oil pipelines, and the temperature sensor 16 is installed on the top cover of the oil tank 9. The flow rate signal, pressure signal, temperature signal, and other switching signals of the lubricating oil are fed back to the PLC controller for real-time monitoring. There are two flow sensors 18.

[0037] like Figure 12 As shown, the control process of the variable frequency speed regulation flow control device in the hoist lubrication station is as follows: When the automatic variable frequency is running, the Siemens 1200 PLC controller is used as the control core. When the flow rate, pressure, temperature or low temperature are too high, the flow sensor, temperature sensor and pressure sensor can accurately capture the output signal of the variable frequency fault, providing a reliable control signal for the motor controlled by the variable frequency to automatically switch from variable frequency operation to power frequency operation. Through the precise PID control inside the PLC controller, the constant current closed-loop control of the lubrication station can be realized, and manual power frequency operation can also be realized.

[0038] The PLC controller process feeds back the pressure, temperature, and flow rate of the lubrication station to the real-time monitoring PLC controller and the PLC controller's built-in upper-level detection system (standard automation signal, 4-20mA, or 0-10V). If the oil supply decreases or is severely interrupted, an alarm is immediately triggered, prompting the lubrication station to be shut down for maintenance. This ensures that the lubrication system's pressure, temperature, and flow rate operate within safe and reasonable ranges, guaranteeing the safe operation of the equipment.

[0039] In the description of the utility model, need understanding is, the indicated direction or position relation is based on the direction or position relation shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not the indication or the implied device or the element that the indicated must have the specific direction, constructs and operates with the specific direction, therefore can not be understood as the restriction of the utility model.

[0040] Although the embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A hoist lubrication station variable frequency speed flow control device, comprising a lubrication station (20) connected with a reducer (19) through a lubricating oil pipeline, the lubrication station comprising an oil tank (9) on which are mounted a gear oil pump (3), a safety valve (4), an electric motor (5), a check valve (6), an electric contact thermometer (12), an electric heater (13), a gate valve (14) and a liquid level gauge (15), and in the oil tank (9) is mounted an oil return filter (1), and on the oil tank (9) is mounted an air cleaner (2) above the oil return filter (1), the safety valve (4) extends into the oil tank (9) through a lubricating oil pipeline, the oil tank (9) is connected with an electric contact pressure gauge (10) with a pressure gauge switch (11) through a lubricating oil pipeline, the gear oil pump (3) penetrating into the oil tank (9) is provided with an electric motor (5), the gear oil pump (3) is connected with a paper filter (8) through a check valve (6), and the oil tank (9) is connected with a cooler (7) through a lubricating oil pipeline; characterized in that: The motor (5) is electrically connected with a variable frequency speed regulation device for flow closed loop regulation, the variable frequency speed regulation device is electrically connected with a PLC controller (24), and the PLC controller is electrically connected with an intelligent control instrument.

2. The elevator lubrication station variable frequency drive flow control device of claim 1, wherein: The lubricating oil pipeline comprises an oil outlet pipeline (21) and an oil return pipeline (22), the oil outlet pipeline is connected between a gate valve (14) on the oil tank (9) and a gear box of the speed reducer (19), one end of the oil return pipeline (22) is welded to an oil return port of the speed reducer (19), and the other end of the oil return pipeline (22) is connected to an oil return hole (26) formed in the side wall of the lubricating station, and lubricating oil flows back to the lubricating station through the oil return pipeline.

3. The elevator lubrication station variable frequency drive flow control device of claim 1, wherein: The variable frequency speed regulation device comprises a frequency converter (25) connected with the motor, the frequency converter (25) and the motor (5) are sequentially electrically connected with a second AC contactor, a thermal relay and a change-over switch, the frequency converter is electrically connected with a three-phase power supply through a first AC contactor and a first miniature circuit breaker, the first miniature circuit breaker, the first AC contactor, the frequency converter, the second AC contactor, the thermal relay and the change-over switch constitute a variable frequency driving system, when the variable frequency driving system fails, the main circuit of the frequency converter is switched to the operating state of the power frequency driving system, and if the failure is removed after the failure is reset, the main circuit of the frequency converter returns to the variable frequency operating state.

4. The elevator lubrication station variable frequency drive flow control device of claim 3, wherein: An analog quantity input end of the frequency converter is connected with the PLC controller.

5. The elevator lubrication station variable frequency drive flow control device of claim 4, wherein: The frequency converter is of AD300 type.

6. The elevator lubrication station variable frequency drive flow control device of claim 3, wherein: The power frequency driving system comprises a first miniature circuit breaker connected with a three-phase power supply, the first miniature circuit breaker is electrically connected with a second AC contactor through a third AC contactor, and the second AC contactor is electrically connected with the motor through the thermal relay and the change-over switch.

7. The hoist lubrication station variable frequency drive flow control device of claim 1, wherein: The PLC controller comprises a main module and an extension module, the main module and the extension module are connected with a digitized socket CZ in parallel, an input end of the main module is connected with an intelligent control instrument for monitoring flow, pressure and excessively high or low temperature, and an output end of the main module is connected with a frequency converter power supply relay, a frequency converter forward rotation operating relay, a power frequency operating relay, a failure relay and a failure reset relay; and an analog quantity output end of the extension module is connected with an analog quantity input end of the frequency converter.

8. The hoist lubrication station variable frequency drive flow control device of claim 7, wherein: The intelligent control instrument comprises a pressure sensor (17) for collecting lubricating oil pressure, a flow sensor (18) for collecting lubricating oil flow and a temperature sensor (16) for collecting lubricating oil temperature, the pressure sensor (17) and the flow sensor (18) are installed on the oil tank (9) through a lubricating oil pipeline, and the temperature sensor (16) is installed on a top cover of the oil tank.

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