Intelligent control motor regular oiling device and control method

Abstract

The present application belongs to the technical field of nuclear power plant electrical maintenance, and particularly relates to a kind of intelligent control motor regular oiling device and control method.The present application includes grease storage box, plunger pump, electromagnetic valve, grease injection pipeline, grease injection hose, motor grease injection hole, grease injection control cabinet, power supply, motor start-stop signal;The one end of the grease storage box is connected with the plunger pump, the other end of the plunger pump is connected with the grease injection pipeline, and the electromagnetic valve is arranged thereon;The grease injection pipeline is connected to the motor grease injection hole through the grease injection hose;The plunger pump and the electromagnetic valve are connected with the grease injection control cabinet respectively, the grease injection control cabinet is connected with the power supply, and the input end of the grease injection control cabinet receives the motor start-stop signal.The present application can improve the motor operation reliability, reduce the labor consumption, protect the personal safety, more accurately grasp the oiling opportunity, and prolong the service life of the motor bearing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nuclear power plant electrical maintenance, and particularly relates to an intelligent control motor regular grease injection device and a control method. BACKGROUND

[0002] The non-sealed motor bearing of each unit of a nuclear power plant 1 and 2 uses regular manual addition of lubricating grease.

[0003] Problems existing in motor grease injection:

[0004] 1. At present, the 1 and 2 units use the manual regular oil gun filling of new grease mode, which is time-consuming and laborious, and in most cases, the oil supplement is performed during the operation of the motor, greatly increasing the personnel operation risk.

[0005] 2. The grease parameters used by different types of motors are different, and due to the excessive types of power plant motors, it is easy to misuse the wrong grease, resulting in reduced or damaged motor bearing life.

[0006] 3. After the staff uses the oil gun, it is easy to have uncleaned dirt in the oil filler neck, affecting the normal service life of the bearing.

[0007] 4. At present, the manual regular oil gun filling of new grease mode does not develop an injection grease cycle according to the different actual operating conditions of the motor, resulting in excessive or insufficient injection of grease, greatly reducing the protection effect on the bearing.

[0008] 5. Some motors in the power station are in a high radiation area, and the personnel entering during operation have a great radiation risk. SUMMARY

[0009] The purpose of the application is to provide an intelligent control motor regular grease injection device and control method, which can improve the reliability of motor operation, reduce labor consumption, protect personal safety, more accurately grasp the timing of grease injection, and prolong the service life of motor bearings.

[0010] The technical solution adopted by the application is:

[0011] An intelligent control motor grease injection device, comprising a grease storage box, a plunger pump, a solenoid valve, a grease injection pipeline, a grease injection hose, a motor grease injection hole, a grease injection control cabinet, a power supply and a motor start-stop signal; the grease storage box is connected with one end of the plunger pump, the other end of the plunger pump is connected with the grease injection pipeline, and the grease injection pipeline is provided with the solenoid valve; the grease injection pipeline is connected to the motor grease injection hole through the grease injection hose; the plunger pump and the solenoid valve are respectively connected with the grease injection control cabinet, the grease injection control cabinet is connected with the power supply, and the input end of the grease injection control cabinet receives the motor start-stop signal.

[0012] The grease injection control cabinet further comprises a control system, and the control system comprises a primary loop and a secondary loop.

[0013] The primary circuit of the control system is connected with 220V AC power supply and switch Q0, and is further connected with transformer T, rectifier U and contactor KM in sequence.

[0014] The secondary circuit is provided with PLC power supply lamp L1, and a fuse FU is arranged on the lamp; and a switch Q1 is arranged between the primary circuit and the secondary circuit.

[0015] The secondary circuit of the control system is connected with a PLC module.

[0016] The input end of the PLC module is connected with oil pump motor running state detection switch K1, test button start SA, test button stop TA and conversion button S0 in sequence; and the output end is connected with contactor KM, electromagnetic valve YV, alarm lamp L2 and start-stop lamp L3.

[0017] A control method of an intelligent control grease injection device of a motor, comprising the following steps:

[0018] Manual grease injection of the plunger pump:

[0019] Step 1: place the conversion knob S0 in the non-automatic mode, turn on the 220V AC power, close the switch Q0, convert the current into 5V AC power through the transformer T, and convert the 5V AC power into 5V DC power through the rectifier U; after waiting for the PLC to issue a closing instruction, the contactor KM is turned on, and the plunger pump motor is started to inject grease;

[0020] Step 2: close the switch Q1, and the PLC power supply indicator L1 lamp is powered through the fuse FU, the indicator L1 is turned on, and the PLC is powered and operated at the same time;

[0021] Step 3: enter the setting interface through the microcomputer and the PLC panel, input the pre-set grease injection time and load motor running time into the PLC module, and complete the setting of the load motor running time timer and the plunger pump running time timer;

[0022] Step 4: press the test button SA, the PLC issues an instruction to open the electromagnetic valve YV, the PLC is connected with the KM and starts the plunger pump to inject grease; press the test button TA to stop the plunger pump and close the electromagnetic valve;

[0023] Automatic grease injection of the plunger pump:

[0024] Step 1: the state knob S0 is placed in the automatic mode, the automatic state indicator light L3 is bright, the PLC is operated according to the program prepared in advance, when the monitoring load motor operating time reaches the set value, the PLC sends a command to open the electromagnetic valve YV, the contactor KM is connected and the plunger pump is started to add grease, when the plunger pump motor operating time reaches the set value, the PLC sends a command to close the electromagnetic valve and the plunger pump motor is automatically stopped to add grease; the PLC is automatically reset after completing the motor grease adding, and the running time of the load motor is automatically restarted to prepare for the next grease adding;

[0025] Step 2: if the power supply is lost in the automatic state, the timing data will be automatically saved and the timing will continue at the next start.

[0026] When the load motor bearing is replaced, the timer is reset through the PLC touch screen.

[0027] Compared with the prior art, the beneficial effects of the present application are that:

[0028] (1) the present application provides a kind of intelligent control motor regular grease injection device and control method, which can minimize the consumption of labor force;

[0029] (2) the present application provides a kind of intelligent control motor regular grease injection device and control method, which can protect personal safety and reduce the risk of personnel operation;

[0030] (3) the present application provides a kind of intelligent control motor regular grease injection device and control method, which can prevent the radiation risk caused by personnel entering during operation;

[0031] (4) the present application provides a kind of intelligent control motor regular grease injection device and control method, which avoids the situation that dirty exists in the oil filler after the worker uses the oil gun and does not clean it, prolongs the service life of the motor bearing;

[0032] (5) the present application provides a kind of intelligent control motor regular grease injection device and control method, the mode of motor intelligent control grease injection will be formulated according to the different actual operation conditions of motor, more accurately grasps the opportunity of grease injection, greatly improves the protection effect of bearing while reducing the energy and material loss;

[0033] (6) the present application provides a kind of intelligent control motor regular grease injection device and control method, which reasonably adds grease to ensure the safe operation of motor and improves the reliability of motor operation. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a kind of motor intelligent control grease injection device structure schematic view;

[0035] Figure 2It is a control system structure schematic diagram of a kind of motor intelligent control grease injection device;

[0036] In the figure: 1-lipid storage box, 2-plunger pump, 3-solenoid valve, 4-grease injection pipeline, 5-grease injection hose, 6-motor grease hole, 7-grease injection control cabinet, 8-power supply, 9-motor start-stop signal. DETAILED DESCRIPTION

[0037] The motor intelligent control grease injection device provided by the application is further described in detail below in combination with the drawings and specific implementation.

[0038] As Figure 1 Described, the motor intelligent control grease injection device provided by the application includes lipid storage box 1, plunger pump 2, solenoid valve 3, grease injection pipeline 4, grease injection hose 5, motor grease hole 6, grease injection control cabinet 7, power supply 8, motor start-stop signal 9; lipid storage box 1 is connected with one end of plunger pump 2, the other end of plunger pump 2 is connected with grease injection pipeline 4, and solenoid valve 3 is arranged thereon; grease injection pipeline 4 is connected to motor grease hole 6 through grease injection hose 5; plunger pump 2 and solenoid valve 3 are connected with grease injection control cabinet 7 respectively, grease injection control cabinet 7 is connected with power supply 8, and simultaneously the input end of grease injection control cabinet 7 receives motor start-stop signal 9.

[0039] The control system in grease injection control cabinet 7 includes a control system, and the control system is as shown in Figure 2 It includes primary loop, main road, secondary loop.

[0040] The primary loop of the control system is connected with 220V alternating current power supply and switch Q0, is connected with transformer T and rectifier U, is converted into 5V direct current, and then controls the grease injection monitoring device through contactor KM;

[0041] The secondary loop is provided with PLC power lamp L1, and is provided with fuse FU thereon; the switch Q1 is arranged between the primary loop and the secondary loop.

[0042] The secondary loop of the control system is connected with PLC module (PLC200 is adopted in the design), and the input end is connected with oil pump motor running state detection switch K1, test button start SA, test button stop TA and conversion button S0 respectively; the output end is connected with contactor KM, solenoid valve YV, alarm lamp L2 and start-stop lamp L3.

[0043] Among them: running state detection switch K1: monitor oil pump motor start-stop; test button SA: carry out debugging simulation plunger pump motor start; test button stop TA: simulate plunger pump motor stop; conversion button S0: hand automatic control grease injection pump running state; contactor KM: control injection plunger pump operation; alarm lamp L2: PLC fault alarm; start-stop lamp L3: oil pump motor running state; PLC power lamp L1: control box power state indication.

[0044] The application provides a kind of intelligent control motor regular grease injection device control method, comprising the following steps:

[0045] Step 1: Place the conversion knob S0 in the non-automatic mode, turn on the 220V AC power, close the switch Q0, the current is converted to 5V AC power through the transformer T, and converted to 5V DC power through the rectifier U, after waiting for the PLC to issue a closing instruction, the contactor KM is turned on, and the plunger pump motor starts to add grease;

[0046] Step 2: Close switch Q1, PLC power indicator L1 light through fuse FU, indicator light L1 light up, while PLC power runs.

[0047] Step 3: Enter the setting interface through the microcomputer and PLC panel, input the pre-set grease injection time and load motor running time into the PLC module, the plunger pump running time is calculated according to the formula T=G / V, G=0.005*D*B, G: recommended grease injection amount (g) D: bearing outer diameter (mm) B, bearing width (mm); V is the flow rate.

[0048] Complete the setting of load motor running time timer and plunger pump running time and other timers.

[0049] Step 4: Plunger pump manual grease. In the non-automatic state, press the test button SA, PLC issues an instruction to open the electromagnetic valve YV, PLC connects KM and starts the plunger pump to add grease. Press the test button TA to stop the plunger pump and close the electromagnetic valve.

[0050] Step 5: Plunger pump automatic grease. Place the state knob S0 in the automatic mode, the automatic state indicator light L3 lights up, PLC runs according to the pre-programmed program, when the monitored load motor running time reaches the set value, PLC issues an instruction to open the electromagnetic valve YV, connect the contactor KM and start the plunger pump to add grease, when the plunger pump motor running time reaches the set value, PLC issues an instruction to close the electromagnetic valve and automatically stop the plunger pump motor. PLC automatically resets several timers after completing the motor grease injection, and automatically restarts the load motor running time to prepare for the next grease injection.

[0051] Step 6: In the automatic state, if the power fails, the timing data will be automatically saved and continue to count when the next start.

[0052] Step 7: When the load motor bearing is replaced after maintenance, reset the timer through the PLC touch screen.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the art who, within the technical scope disclosed by the present invention, makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A motor intelligent control grease injection device, characterized by: The invention comprises a grease storage box (1), a plunger pump (2), a solenoid valve (3), a grease injection pipeline (4), a grease injection hose (5), a motor grease filling hole (6), a grease injection control cabinet (7), a power supply (8), and a motor start / stop signal (9); the grease storage box (1) is connected to one end of the plunger pump (2), the other end of the plunger pump (2) is connected to the grease injection pipeline (4), and the solenoid valve (3) is provided on the grease injection pipeline (4); the grease injection pipeline (4) is connected to the motor grease filling hole (6) through the grease injection hose (5); the plunger pump (2) and the solenoid valve (3) are respectively connected to the grease injection control cabinet (7), and the grease injection control cabinet (7) is connected to the power supply (8). At the same time, the input end of the grease injection control cabinet (7) receives the motor start / stop signal (9); the grease injection control cabinet (7) also includes a control system, which includes a primary circuit and a secondary circuit; the primary circuit of the control system is connected to a 220V AC power supply and a switch Q0, and is also connected in sequence to a transformer T, a rectifier U, and a contactor KM; the current is converted into 5V DC power by the transformer T and the rectifier U; the secondary circuit is provided with a PLC power light L1, and a fuse FU; a switch Q1 is provided between the primary circuit and the secondary circuit; the secondary circuit of the control system is connected to a PLC module; The input end of the PLC module is respectively connected to the oil pump motor operation status detection switch K1, the test start button SA, the test stop button TA, and the conversion button S0; the output end is connected to the contactor KM, the second solenoid valve YV, the alarm light L2 and the start-stop light L3.

2. The control method of the motor intelligent control grease injection device according to claim 1, characterized in that: The steps include: Manual greasing with a plunger pump: Step (1): Place the conversion button S0 in the non-automatic mode, connect the 220V AC power, close the switch Q0, and the current is converted into 5V AC power through the transformer T, and then converted into 5V DC power through the rectifier U. After waiting for the PLC to issue a closing command, the contactor KM is turned on and the plunger pump motor starts to add lubricant; Step (2): Close the switch Q1, the PLC power light L1 is energized through the fuse FU, the PLC power light L1 lights up, and the PLC is powered and running; Step (3): Enter the setting interface through the microcomputer and PLC panel, input the pre-set grease injection time and load motor running time into the PLC module, and complete the setting of the load motor running time timer and the plunger pump running time timer; Step (4): Press the test start button SA, the PLC issues a command to open the second solenoid valve YV, the PLC connects the contactor KM and starts the plunger pump for lubrication; press the test stop button TA to stop the plunger pump and close the solenoid valve (3); Automatic greasing with plunger pump: Step (1): put the conversion button S0 into automatic mode, and when the start / stop light L3 is on, the PLC runs according to the pre-programmed program. When the monitored load motor running time reaches the set value, the PLC issues a command to open the second solenoid valve YV, connect the contactor KM and start the plunger pump to add lubrication. When the plunger pump motor running time reaches the set value, the PLC simultaneously issues a command to close the solenoid valve (3), and the plunger pump motor automatically stops adding lubrication. After completing the motor greasing, the PLC automatically resets several timers and automatically restarts counting the load motor running time to prepare for the next greasing. Step (2): If the power fails in automatic mode, the timing data will be automatically saved and will continue to be timed at the next startup.

3. The control method of the motor intelligent control grease injection device according to claim 2, characterized in that: When the load motor is pre-maintained and the bearings are replaced, the timer is reset through the PLC touch screen.

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