A device and method for cleaning a reflector of a trolley

Abstract

The present application relates to a kind of unmanned trolley reflector cleaning device and method, belong to metallurgical device and method technical field.The technical scheme of the present application is: in water spraying device, water storage tank (4) is communicated with the drain pipe (2) of air conditioner (1), water storage tank (4) is connected with nozzle (14);In scrubbing device, raindrop sensor (15) is installed between reflector support (10) and reflector (11), fixed shaft (56) is fixed on reflector support (10), and scrubbing device DC motor (50) drives fixed shaft (56) to drive wiper blade (55) to swing left and right;Water storage tank (4) is equipped with liquid level sensor, and liquid level sensor, washing pump (5), raindrop sensor (15) and scrubbing device DC motor (50) are interconnected.The beneficial effects of the present application are: effectively solve the discharge problem of condensate water, and prevent the waste of water resources;Effectively avoid condensate water to drop on the surface of steel coil, and protect the yield of steel coil.

Description

Technical Field

[0001] This invention relates to a cleaning device and method for the reflector of an unmanned overhead crane, belonging to the technical field of metallurgical equipment and methods. Background Technology

[0002] During automated work order execution, unmanned overhead cranes require real-time positioning of both the trolley and crane. Laser rangefinders emit lasers that illuminate reflectors, and distance is determined by receiving the reflected signals. Over long-term operation, dust accumulates on the reflector surface, severely affecting light reflectivity and ultimately leading to inaccurate crane positioning or even crane malfunction. Air conditioning is installed in both the crane's electrical room and driver's cab to cool the electrical equipment and extend its lifespan. Currently, the primary method for handling air conditioning condensate is to drain it directly into the storage area. This method results in condensate dripping onto the steel coils in the storage area, reducing the yield of finished steel coils. Industrial air conditioners often have high power consumption, generating a large amount of condensate daily, which is wasteful to simply drain. Summary of the Invention

[0003] The purpose of this invention is to provide a cleaning device and method for reflectors on unmanned overhead cranes. By collecting condensate discharged from the air conditioner, the device uses a water spraying device and a wiping device to automatically clean the reflectors, effectively solving the problem of condensate discharge and eliminating water waste. It also effectively prevents condensate from dripping onto the surface of steel coils, protecting the yield of finished steel coils. The cleaning of the reflectors effectively prevents the problem of reduced reflectivity due to dust, indirectly improving the positioning accuracy of the unmanned overhead crane and increasing its operational stability. The automatic function greatly saves labor costs, and the comprehensive consideration of numerous interlocks makes the operation of the device safer and more stable, effectively solving the aforementioned problems existing in the background art.

[0004] The technical solution of the present invention is: a cleaning device for reflectors of unmanned overhead cranes, comprising a water spraying device and a wiping device. In the water spraying device, a water storage tank is connected to the drain pipe of an air conditioner. The lower half of the water storage tank is a hollow structure, and a washing pump is installed in the hollow part. The water storage tank is connected to a water spraying pipe through the washing pump and the water outlet pipe of the washing pump. A nozzle is provided at the end of the water spraying pipe, and the position of the nozzle matches the reflector. In the wiping device, the raindrop sensor is installed between the reflector bracket and the reflector. The DC motor of the wiping device drives the worm gear to rotate, the worm gear drives the turbine, the turbine drives the rocker arm to rotate, the rotation of the rocker arm drives the connecting rod to reciprocate. The fixed shaft is fixed on the reflector bracket, and the connecting rod drives the wiper blade to swing left and right through the fixed shaft. The water storage tank is equipped with a level sensor, and the level sensor, washing pump, raindrop sensor and scrubbing device DC motor are interconnected.

[0005] The turbine has a built-in resetter, which includes a copper ring and brushes. The resetter rotates simultaneously with the turbine, and when the resetter rotates to a specific position, it can switch the copper ring and brushes on and off.

[0006] The liquid level sensor includes a high liquid level sensor, a low liquid level sensor, and a limit liquid level sensor, which are installed at the high, low, and limit positions of the water storage tank, respectively. The top of the water storage tank is equipped with a water storage cover, and an operation box is installed on the top of the water storage cover. The operation box is equipped with a mode conversion switch, a high liquid level indicator, a low liquid level indicator, a power supply button, a power off button, a start button, a stop button, and a spare button. A power distribution box is installed around the water storage tank, and the power supply is drawn from the overhead crane electrical room. An audible and visual alarm is installed above the power distribution box, and its power supply voltage is DC 24V. The audible and visual alarm is connected to the limit liquid level sensor.

[0007] The water storage tank is equipped with a water inlet, which is connected to a drain pipe; the motor of the washing pump is a permanent magnet DC motor with a power supply voltage of DC 12V; the nozzle surface has one or more small holes.

[0008] The water spray pipe is equipped with a magnet, which is a neodymium magnet. The water spray pipe is attached to the reflector bracket by the magnet and can be adjusted up, down, left and right.

[0009] A sponge is attached to the wiper blade, and the sponge comes into direct contact with the reflector during the wiping process.

[0010] A method for cleaning the reflector of an unmanned overhead crane includes the following steps: (1) The water spraying device has two operating modes: manual and automatic. The specific steps for manual operation mode are as follows: Press the power button to power on the device. Once power is supplied, the power indicator light will remain on. Press the power off button to power off the device, and the power indicator light will turn off. Switch the mode switch to manual mode for manual operation. After the water level in the storage tank is above the low level and the device is powered on, press the start button. If the water level is above the high level, the washing pump will run at high speed. When the water level drops between the high and low levels, the washing pump will run at low speed. During operation, the start indicator light will remain on. To stop, press the stop button. When the water level in the storage tank drops below the low level, the washing pump will stop running. The specific steps for automatic operation mode are as follows: When the mode switch is switched to automatic mode, the washing pump will automatically run at high speed after the device is powered on and the water level in the storage tank is above the high level. During operation, the start indicator light will remain on. When the water level in the storage tank drops below the high level, the washing pump will run at low speed until the water level drops below the low level. (2) The operation of the scrubbing device is divided into three stages: normal operation stage, output disconnection stage and reset stage; The normal operation phase refers to the period when the unmanned crane is in a safe state and the rain sensor detects water pressure. When the water level in the storage tank is above the high level, the scrubbing device operates at high speed. When the water level in the storage tank drops to between the high and low levels, the scrubbing device operates at low speed.

[0011] The output disconnection stage refers to the current circuit of the normal operation stage being cut off when the water level in the storage tank drops below the low level or when the unmanned overhead crane is in an unsafe state. The reset device intervenes, the scrubbing device does not stop immediately, the motor continues to run at low speed, and the reset device follows the turbine to rotate at low speed. The reset phase refers to the low-speed rotation of the reset device during the output disconnection phase. When the copper ring on the reset device rotates to a specific position, the current circuit of the output disconnection phase is cut off. At this time, the DC motor of the wiping device does not stop immediately, but relies on inertia to run for a few seconds before stopping. During this period, the DC motor of the wiping device converts kinetic energy into electrical energy, generating an induced electromotive force, and an induced current is generated in the circuit. The current circuit flows in reverse through the armature of the DC motor of the wiping device, instantly generating a braking torque, causing the wiper blade to stop immediately below the reflector.

[0012] The cleaning device takes into account the operating status of the unmanned overhead crane during operation. The cleaning device is not allowed to operate when the unmanned overhead crane is in operation or about to start operation, in order to prevent the wiper blades from blocking the light beam when swinging.

[0013] The beneficial effects of this invention are as follows: by collecting the condensate discharged from the air conditioner, the reflector is automatically cleaned using a water spraying device and a wiping device, effectively solving the problem of condensate discharge and eliminating water waste; effectively preventing condensate from dripping onto the surface of the steel coil, thus protecting the yield of the steel coil; cleaning the reflector effectively prevents the reflectivity of the reflector from decreasing due to dust, indirectly improving the positioning accuracy of the unmanned overhead crane and increasing the stability of the unmanned overhead crane operation; the automatic function greatly saves labor costs, and the comprehensive consideration of numerous interlocks makes the operation of the device safer and more stable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the water spraying device of the present invention; Figure 2 This is a schematic diagram of the button layout of the operation box of the present invention; Figure 3 This is a schematic diagram of the scrubbing device of the present invention; Figure 4 This is a schematic diagram of the wiper blade structure of the present invention; Figure 5 This is the electrical schematic diagram of the relay part of the present invention; Figure 6 This is the electrical schematic diagram of the indicator light and audible / visual alarm of the present invention; Figure 7This is the electrical schematic diagram of the washing spray device of the present invention; Figure 8 This is an electrical schematic diagram of the scrubbing device of the present invention during normal operation. Figure 9 This is the electrical schematic diagram of the output disconnection stage of the scrubbing device of the present invention; Figure 10 This is the electrical schematic diagram of the reset phase of the wiping device of the present invention; In the diagram: 1. Air conditioner; 2. Drain pipe; 3. Water inlet; 4. Water tank; 5. Washer pump; 6. High level sensor; 7. Low level sensor; 8. Limit level sensor; 9. Washer pump outlet pipe; 10. Reflector bracket; 11. Reflector; 12. Spray pipe; 13. Magnet; 14. Nozzle; 15. Rain sensor; 20. Water tank cap; 21. Control box; 22. Mode switch; 23. High level indicator light; 24. Low level indicator light; 25. Power on button; 26. Power off button; 27. Start button; 28. Stop button; 29. ​​Spare button. Button 29, Distribution box 30, Audible and visual alarm 31, Washing pump motor armature 40, Washing pump negative brush 41, Washing pump low-speed brush 42, Washing pump high-speed brush 43, Scrubbing device DC motor 50, Worm 51, Turbine 52, Rocker arm 53, Connecting rod 54, Squeegee 55, Fixed shaft 56, Sponge 57, Resetter 60, Copper ring 61, Brush A 62, Brush B 63, Brush C 64, Scrubbing device DC motor armature 70, Negative brush 71, Low-speed brush 72, High-speed brush 73; Figure 5 and Figure 6 In the diagram, the control box buttons, indicator lights, and sensors are represented by electrical symbols. Figure 5 S1, S2, S3, S4, PBL1, PBL2, PBL3, PBL4, and PBL5 are respectively equivalent to Figures 1-3 The high liquid level sensor 6, low liquid level sensor 7, extreme liquid level sensor 8, raindrop sensor 15, power on button 25, power off button 26, start button 27, stop button 28, mode conversion switch 22; Figure 6 A1 in the middle is equivalent to Figure 1 The audible and visual alarms 31, PL1, and PL2 are respectively equivalent to Figure 2 The high liquid level indicator 23 and low liquid level indicator 24 are in the middle, and PL3 and PL4 are the power supply indicator and start indicator, respectively. The relays shown in the figure are all of the same model 1R-7R. The contacts (13,14) are the relay coils. The relays contain four sets of normally open auxiliary contacts (5,9), (6,10), (7,11), (8,12) and four sets of normally closed auxiliary contacts (1,9), (2,10), (3,11), (4,12). Detailed Implementation

[0015] To make the purpose, technical solutions, and advantages of the invention's embodiments clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only a small part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0016] A cleaning device for reflectors of an unmanned overhead crane includes a water spraying device and a scrubbing device. In the water spraying device, a water storage tank 4 is connected to the drain pipe 2 of an air conditioner 1. The lower half of the water storage tank 4 is hollow, and a washing pump 5 is installed in the hollow part. The water storage tank 4 is connected to a water spraying pipe 12 through the washing pump 5 and the water outlet pipe 9 of the washing pump. A nozzle 14 is provided at the end of the water spraying pipe 12, and the position of the nozzle 14 matches that of the reflector 11. In the wiping device, the raindrop sensor 15 is installed between the reflector bracket 10 and the reflector 11. The DC motor 50 of the wiping device drives the worm gear 51 to rotate. The worm gear 51 drives the turbine 52. The turbine 52 drives the rocker arm 53 to rotate. The rotation of the rocker arm 53 drives the connecting rod 54 to reciprocate. The fixed shaft 56 is fixed on the reflector bracket 10. The connecting rod 54 drives the wiper blade 55 to swing left and right through the fixed shaft 56. The water storage tank 4 is equipped with a liquid level sensor, and the liquid level sensor, washing pump 5, raindrop sensor 15 and scrubbing device DC motor 50 are interconnected.

[0017] The turbine 52 has a built-in resetter 60, which includes a copper ring 61 and a brush. The resetter 60 rotates simultaneously with the turbine 52. When the resetter 60 rotates to a specific position, it can realize the connection and disconnection between the copper ring 61 and the brush.

[0018] The liquid level sensor includes a high liquid level sensor 6, a low liquid level sensor 7 and a limit liquid level sensor 8, which are respectively installed at the high position, low position and limit position of the water storage tank 4. The top of the water storage tank 4 is equipped with a water storage cover 20, and an operation box 21 is installed on the top of the water storage cover 20. The operation box 21 is equipped with a mode conversion switch 22, a high liquid level indicator 23, a low liquid level indicator 24, a power supply button 25, a power off button 26, a start button 27, a stop button 28, and a spare button 29. A power distribution box 30 is installed around the water storage tank 4, and the power supply is drawn from the overhead crane electrical room. An audible and visual alarm 31 is installed above the power distribution box 30. Its power supply voltage is DC 24V, and the audible and visual alarm 31 is connected to the limit liquid level sensor 8.

[0019] The water storage tank 4 is provided with a water inlet 3, which is connected to the drain pipe 2; the motor of the washing pump 5 is a permanent magnet DC motor, and the power supply voltage is DC 12V; the nozzle 14 has one or more small holes on its surface.

[0020] A magnet 13 is installed on the water spray pipe 12. The magnet 13 is a neodymium magnet. The water spray pipe 12 is attracted to the reflector bracket 10 by the magnet 13 and can be adjusted up, down, left and right.

[0021] A sponge 57 is attached to the wiper blade 55, and the sponge 57 comes into direct contact with the reflector 11 during the wiping process.

[0022] A method for cleaning the reflector of an unmanned overhead crane includes the following steps: (1) The water spraying device has two operating modes: manual and automatic. The specific steps for manual operation mode are as follows: Press the power button to power on the device. Once power is supplied, the power indicator light will remain on. Press the power off button to power off the device, and the power indicator light will turn off. Switch the mode switch to manual mode for manual operation. After the water level in the storage tank is above the low level and the device is powered on, press the start button. If the water level is above the high level, the washing pump will run at high speed. When the water level drops between the high and low levels, the washing pump will run at low speed. During operation, the start indicator light will remain on. To stop, press the stop button. When the water level in the storage tank drops below the low level, the washing pump will stop running. The specific steps for automatic operation mode are as follows: When the mode switch is switched to automatic mode, the washing pump will automatically run at high speed after the device is powered on and the water level in the storage tank is above the high level. During operation, the start indicator light will remain on. When the water level in the storage tank drops below the high level, the washing pump will run at low speed until the water level drops below the low level. (2) The operation of the scrubbing device is divided into three stages: normal operation stage, output disconnection stage and reset stage; The normal operation phase refers to the period when the unmanned crane is in a safe state and the rain sensor detects water pressure. When the water level in the storage tank is above the high level, the scrubbing device operates at high speed. When the water level in the storage tank drops to between the high and low levels, the scrubbing device operates at low speed.

[0023] The output disconnection stage refers to the current circuit of the normal operation stage being cut off when the water level in the storage tank drops below the low level or when the unmanned overhead crane is in an unsafe state. The reset device intervenes, the scrubbing device does not stop immediately, the motor continues to run at low speed, and the reset device follows the turbine to rotate at low speed. The reset phase refers to the low-speed rotation of the reset device during the output disconnection phase. When the copper ring on the reset device rotates to a specific position, the current circuit of the output disconnection phase is cut off. At this time, the DC motor of the wiping device does not stop immediately, but relies on inertia to run for a few seconds before stopping. During this period, the DC motor of the wiping device converts kinetic energy into electrical energy, generating an induced electromotive force, and an induced current is generated in the circuit. The current circuit flows in reverse through the armature of the DC motor of the wiping device, instantly generating a braking torque, causing the wiper blade to stop immediately below the reflector.

[0024] The cleaning device takes into account the operating status of the unmanned overhead crane during operation. The cleaning device is not allowed to operate when the unmanned overhead crane is in operation or about to start operation, in order to prevent the wiper blades from blocking the light beam when swinging.

[0025] In practical applications, the present invention consists of two parts: a water spraying device and a scrubbing device.

[0026] Water spray device: like Figure 1 The drain pipe 2 is connected to the water inlet 3 of the water storage tank 4. The condensate water generated by the air conditioner 1 is collected in the water storage tank 4 through the drain pipe 2. The lower half of the water storage tank 4 is hollow, and a washing pump 5 is installed in the hollow part. The motor of the washing pump 5 is a permanent magnet DC motor, and the power supply voltage is DC 12V. When the washing pump 5 is running, it pressurizes the water in the water storage tank 4 through the washing pump outlet pipe 9 and sprays it onto the nozzle 14. The surface of the nozzle 14 consists of several small holes. After being squeezed by the nozzle 14, the water is sprayed into a mist onto the reflector 11.

[0027] A magnet 13, which is a neodymium magnet, is installed on the water spray pipe 12. The reflector bracket 10 is made of iron plate. The water spray pipe 12 is strongly magnetically attached to the reflector bracket 10 by the magnet 13 and can be adjusted up, down, left, and right.

[0028] The water storage tank 4 is equipped with a high-level sensor 6, a low-level sensor 7, and a limit-level sensor 8 at the high, low, and limit positions, respectively. A distribution box 30 is installed around the water storage tank 4, and the power supply for the distribution box 30 is drawn from the overhead crane electrical room. An audible and visual alarm 31 is installed above the distribution box 30, powered by 24V DC. The audible and visual alarm 31 is triggered when the limit-level sensor 8 detects a liquid level.

[0029] like Figure 1 and Figure 2 An operation box 21 is installed on the top of the water storage cover 20. The operation box 21 contains a mode conversion switch 22, a high liquid level indicator 23, a low liquid level indicator 24, a power-on button 25, a power-off button 26, a start button 27, a stop button 28, and a spare button 29. The power-on button 25 and the start button 27 on the operation box 21 have built-in indicator lights.

[0030] The following is combined with Figure 5 , Figure 6 and Figure 7 The electrical schematic diagram in the figure provides a further detailed description of the water spray device of the present invention.

[0031] like Figure 5 The 24V DC power supply is drawn from the overhead crane electrical room. The high-level sensor S1, low-level sensor S2, and extreme-level sensor S3 are all two-wire switches. The normally closed contacts of the sensors are connected to the coils of relays 1R, 2R, and 5R, respectively. Under normal conditions, the coils of relays 1R, 2R, and 5R are energized. When the level sensor detects water, the normally closed contact opens, and the corresponding relay coil is de-energized.

[0032] like Figure 6 The 24V DC power supply is drawn from Figure 5 It is used to power the high liquid level indicator 23, low liquid level indicator 24, power supply indicator PL3, start indicator PL4, and audible and visual alarm A1.

[0033] The water spraying device has two operating modes: manual and automatic.

[0034] The specific steps for manual operation mode are as follows: Press the power button PBL1 to power on the device. The coil of relay 3R is energized, the normally open auxiliary contact (6,10) of relay 3R closes, and the power supply indicator PL3 stays on. Press the power off button PBL2 to power off the device, and the power supply indicator PL3 goes out. The mode switch PBL5 has three contacts. Switch the mode switch PBL5 to manual mode, and the common point closes with contact (1). Then manual operation can be performed. Before manual operation, the water level in the storage tank 4 must be above the low level and the device must be powered on, i.e., the normally closed auxiliary contact (1,9) of relay 2R is closed and the normally open contact (5,9) of relay 3R is closed. After the conditions are met, press the start button PBL3. The coil of relay 4R is energized, the normally open auxiliary contact (6,10) of relay 4R closes, the start indicator PL4 stays on, and the washing pump 5 starts to run. During this period, press the stop button PBL4 to stop the washing pump 5. During manual operation, when the water level in storage tank 4 drops below the low level, washing pump 5 stops operating.

[0035] The specific steps for automatic operation mode are as follows: Switch the mode conversion switch PBL5 to automatic mode, and connect the switch's common point to contact 2. Automatic operation is achieved when the water level in storage tank 4 is simultaneously above both the high and low levels, and the device is energized. Specifically, the normally closed contacts (1,9) of relay 1R, the normally closed contacts (1,9) of relay 2R, and the normally open contacts (5,9) of relay 3R are closed. Once the operating conditions are met, the coil of relay 4R is energized, and the normally open auxiliary contact (6,10) of relay 4R closes. The washing pump 5 will start automatically, and the start button PBL3 and indicator light PL4 will remain constantly lit during operation. When the water level in the storage tank 4 drops below the high level, the washing pump 5 will continue to run until the water level drops below the low level.

[0036] like Figure 7 The AC 220V voltage is converted to DC 12V voltage via a transformer to power the armature 40 of the washing pump motor. The armature 40 of the washing pump motor has three sets of brushes: the negative brush 41, the low-speed brush 42, and the high-speed brush 43. When the water spray device is running manually or automatically, the washing pump 5 will operate at high speed when the liquid level is above the high level. In the diagram, the normally open auxiliary contact (8,12) of relay 4R closes, the normally closed auxiliary contact (4,12) of relay 2R closes, and the normally closed auxiliary contact (3,11) of relay 1R closes, thus activating the high-speed brush 43 of the washing pump. The current loop is as follows: 12V power supply, auxiliary contacts (8,12) of relay 4R, auxiliary contacts (4,12) of relay 2R, auxiliary contacts (3,11) of relay 1R, high-speed brush 43 of the washing pump, negative brush 41 of the washing pump, and 0V power supply. When the liquid level drops between the high and low levels, the washing pump 5 will operate at low speed. In the diagram, the normally open auxiliary contact (8,12) of relay 4R is closed, the normally closed auxiliary contact (4,12) of relay 2R is closed, the normally open auxiliary contact (8,12) of relay 1R is closed, and the low-speed brush 42 of the washing pump is activated. The current loop is as follows: 12V power supply, auxiliary contacts (8,12) of relay 4R, auxiliary contacts (4,12) of relay 2R, auxiliary contacts (8,12) of relay 1R, low-speed brush 42 of the washing pump, negative brush 41 of the washing pump, and 0V power supply.

[0037] Scrubbing device: like Figure 3 The wiping device consists of a raindrop sensor 15, a DC motor 50, a worm gear 51, a turbine 52, a rocker arm 53, a connecting rod 54, a wiper blade 55, and a fixed shaft 56. The raindrop sensor 15 is mounted between the reflector bracket 10 and the reflector 11, and the fixed shaft 56 is fixed to the reflector bracket 10. When the raindrop sensor 15 detects water pressure, the DC motor 50 starts to operate. The worm gear 51 drives the turbine 52, which in turn drives the rocker arm 53 to rotate. The rotation of the rocker arm 53 causes the connecting rod 54 to reciprocate, and the connecting rod 54, through the fixed shaft 56, causes the wiper blade 55 to swing left and right.

[0038] like Figure 4 During the process of wiping the reflector 11, the sponge 57 is in direct contact with the reflector 11, and the sponge 57 is connected to the wiper blade 55 by glue.

[0039] The cleaning device will be further explained in detail below with reference to the electrical schematic diagram: like Figure 5 The rain sensor S4 is powered by DC 24V, and the normally open contact of the switch is connected to the coil of relay 6R. When the rain sensor S4 detects water pressure, the normally open contact of the switch closes, and the coil of relay 6R is energized.

[0040] Reference Figure 8 , Figure 9 and Figure 10 The AC 220V voltage is converted to DC 12V voltage via a transformer to power the DC motor armature 70 of the cleaning device. The DC motor armature 70 of the cleaning device has three sets of brushes: negative brush 71, low-speed brush 72, and high-speed brush 73. The turbine 52 has a built-in resetter 60, which consists of a copper ring 61 of a specific shape, brush A62, brush B63, and brush C64. The resetter 60 rotates simultaneously with the turbine 52, and rotating to a specific position allows for the switching of the connection between the copper ring 61 and the brushes.

[0041] like Figure 8 The cleaning device takes into account the operating status of the unmanned overhead crane. The cleaning device is not allowed to operate while the crane is running or about to start, to prevent the wiper blades 55 from blocking the beam when they swing. The general steps of the unmanned overhead crane executing a work order are as follows: Step 1: The overhead crane moves to the roll-up position.

[0042] Step 2: The unmanned overhead crane completes the positioning of the large and small trolleys, and the main hook descends to retrieve the coil.

[0043] Step 3: The clamps reach the center of the roll and close to grip the roll.

[0044] Step 4: The coil clamping is complete, and the main hook lifts the coil.

[0045] Step 5: Raise the main hook to the high position, and move the large and small trolleys to the unwinding position.

[0046] Step 6: Move the large unloader into position, and lower the main hook to release the coil.

[0047] Step 7: After placing the steel coil on the saddle, open the clamps to their maximum position.

[0048] Step 8: Raise the main hook to its highest position.

[0049] In automatic mode, the unmanned overhead crane's safe state is defined by the crane's status during steps 2, 3, 4, 6, 7, and 8 when the PLC has not received a work order or during work order execution. In non-automatic mode, the crane's safe state is defined by its stationary state. The PLC logic determines the real-time status of the unmanned overhead crane; when the crane is in a safe operating state, the PLC outputs... When the signal control relay 7R coil is energized, the normally open auxiliary contact (5,9) of relay 7R closes and the normally closed auxiliary contact (2,10) of relay 7R opens.

[0050] The operation of the scrubbing device is divided into three stages: normal operation stage, output disconnection stage, and reset stage.

[0051] like Figure 8 During normal operation, when the unmanned overhead crane is in a safe state, the normally open auxiliary contact (5,9) of relay 7R is closed, and the normally closed auxiliary contact (2,10) is open. When the rain sensor 15 detects water pressure and the water level in the storage tank 4 is above the high level, the normally open auxiliary contact (5,9) of relay 6R is closed, and the normally closed auxiliary contact (4,12) of relay 1R is closed. At this time, the high-speed brush 73 is connected, and the scrubbing device operates at high speed. The current circuit is as follows: power supply 12V, normally open auxiliary contact (5,9) of relay 6R, normally open auxiliary contact (5,9) of relay 7R, normally closed auxiliary contact (4,12) of relay 1R, high-speed brush 73, negative brush 71, power supply 0V. When the water level in the storage tank 4 drops to between the high and low levels, the normally open auxiliary contact (7,11) of relay 1R is closed, and the normally closed auxiliary contact (3,11) of relay 2R is closed. At this time, the low-speed brush 72 is turned on, the high-speed brush 73 is turned off, and the cleaning device operates at low speed. The current circuit is as follows: power supply 12V, normally open auxiliary contacts (5,9) of relay 6R, normally open auxiliary contacts (5,9) of relay 7R, normally closed auxiliary contacts (3,11) of relay 2R, normally open auxiliary contacts (7,11) of relay 1R, low-speed brush 72, negative brush 71, power supply 0V.

[0052] The output disconnection phase refers to the situation where, when the water level in storage tank 4 drops below the low level or the unmanned overhead crane is in an unsafe state, the scrubbing device will not stop immediately but will continue to run at a low speed for a period of time.

[0053] like Figure 9When the scrubbing device is operating normally, if the water level in storage tank 4 drops below the low level, the normally closed auxiliary contacts (4,12) of relay 1R open, the normally closed auxiliary contacts (3,11) of relay 2R open, the normally open auxiliary contacts (7,11) of relay 1R close, and the normally open auxiliary contacts (8,12) of relay 2R close. At this time, the reset device 60 engages. In this position, brushes A62 and B63 simultaneously contact the copper ring 61, while brush C does not contact the copper ring 61. Brushes A62 and B63 are in the ON state, while brush C is not engaged. During this period, the scrubbing device continues to operate at a low speed. The current circuit is as follows: 12V power supply, brush A, brush B, auxiliary contacts (8, 12) of relay 2R, auxiliary contacts (7, 11) of relay 1R, low-speed brush 72, negative brush 71, and 0V power supply. During normal operation of the scrubbing device, when the water level in storage tank 4 has not dropped below the low level, and the unmanned overhead crane is in an unsafe state, the normally closed auxiliary contact (2, 10) of relay 7R closes. At this time, the scrubbing device operates at low speed. The current circuit is as follows: 12V power supply, brush A, brush B, normally closed auxiliary contacts (2, 10) of relay 7R, low-speed brush 72, negative brush 71, and 0V power supply.

[0054] The reset phase refers to the point where the wiper blade 55 remains below the reflector bracket 10 when the wiping device finally stops.

[0055] like Figure 10 During the low-speed operation of the cleaning device in the output disconnect phase, when the copper ring 61 rotates to this position with the worm gear 52, brush A62 and brush B63 lose contact, and brush B63 and brush C64 become connected. At this time, the DC motor 50 of the cleaning device will not stop immediately, but will continue to run for a few seconds due to inertia before stopping. During this inertial running period, the DC motor of the cleaning device... Motor 50 converts kinetic energy into electrical energy, generating an induced electromotive force, and the circuit generates an induced current. The current circuit flows in reverse through the armature 70 of the DC motor in the wiping device, instantly generating braking torque, causing the wiper blade 55 to stop immediately below the reflector 11. The current circuit when the unmanned overhead crane stops in an unsafe state is: power supply 0V, negative brush 71, low-speed brush 72, normally closed auxiliary contacts (2,10) of relay 7R, brush B63, brush C64, power supply 0V; the current circuit when the unmanned overhead crane stops in a safe state due to the water level in the storage tank 4 dropping below the low level is: power supply 0V, negative brush 71, low-speed brush 72, normally open auxiliary contacts (7,11) of relay 1R, normally open auxiliary contacts (8,12) of relay 2R, brush B63, brush C64, power supply 0V.

[0056] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cleaning device for reflectors of an unmanned overhead crane, characterized in that: It includes a water spraying device and a scrubbing device. In the water spraying device, the water storage tank (4) is connected to the drain pipe (2) of the air conditioner (1). The lower half of the water storage tank (4) is hollow. A washing pump (5) is installed in the hollow part. The water storage tank (4) is connected to the water spraying pipe (12) through the washing pump (5) and the water outlet pipe (9) of the washing pump. The end of the water spraying pipe (12) is provided with a nozzle (14). The position of the nozzle (14) matches the reflector (11). In the wiping device, the raindrop sensor (15) is installed between the reflector bracket (10) and the reflector (11). The DC motor (50) of the wiping device drives the worm (51) to rotate. The worm (51) drives the turbine (52). The turbine (52) drives the rocker arm (53) to rotate. The rotation of the rocker arm (53) drives the connecting rod (54) to reciprocate. The fixed shaft (56) is fixed on the reflector bracket (10). The connecting rod (54) drives the wiper blade (55) to swing left and right through the fixed shaft (56). The water storage tank (4) is equipped with a liquid level sensor, and the liquid level sensor, washing pump (5), raindrop sensor (15) and scrubbing device DC motor (50) are interconnected.

2. The unmanned overhead crane reflector cleaning device according to claim 1, characterized in that: The turbine (52) has a built-in resetter (60), which includes a copper ring (61) and a brush. The resetter (60) rotates simultaneously with the turbine (52). When the resetter (60) rotates to a specific position, it can realize the connection and disconnection between the copper ring (61) and the brush.

3. The unmanned overhead crane reflector cleaning device according to claim 1, characterized in that: The liquid level sensor includes a high liquid level sensor (6), a low liquid level sensor (7) and a limit liquid level sensor (8), which are respectively installed at the high position, low position and limit position of the water storage tank (4); The top of the water tank (4) is provided with a water storage cover (20), and an operation box (21) is installed on the top of the water storage cover (20). The operation box (21) is provided with a mode conversion switch (22), a high liquid level indicator (23), a low liquid level indicator (24), a power supply button (25), a power off button (26), a start button (27), a stop button (28), and a spare button (29). A distribution box (30) is installed around the water tank (4), and the power supply is drawn from the overhead crane electrical room. An audible and visual alarm (31) is installed above the distribution box (30), and its power supply voltage is DC 24V. The audible and visual alarm (31) is connected to the limit liquid level sensor (8).

4. The unmanned overhead crane reflector cleaning device according to claim 1, characterized in that: The water storage tank (4) is provided with a water inlet (3), which is connected to the drain pipe (2); the motor of the washing pump (5) is a permanent magnet DC motor, and the power supply voltage is DC 12V; the nozzle (14) has one or more small holes on its surface.

5. The unmanned overhead crane reflector cleaning device according to claim 1, characterized in that: A magnet (13) is installed on the water spray pipe (12). The magnet (13) is a neodymium magnet. The water spray pipe (12) is attracted to the reflector bracket (10) by the magnet (13) and can be adjusted up, down, left and right.

6. The unmanned overhead crane reflector cleaning device according to claim 1, characterized in that: A sponge (57) is attached to the wiper blade (55), and the sponge (57) comes into direct contact with the reflector (11) during the wiping process.

7. A method for cleaning the reflector of an unmanned overhead crane, characterized in that... Includes the following steps: (1) The water spraying device has two operating modes: manual and automatic. The specific steps for manual operation mode are as follows: Press the power button to power on the device. Once power is supplied, the power indicator light will remain on. Press the power off button to power off the device, and the power indicator light will turn off. Switch the mode switch to manual mode for manual operation. After the water level in the storage tank is above the low level and the device is powered on, press the start button. If the water level is above the high level, the washing pump will run at high speed. When the water level drops between the high and low levels, the washing pump will run at low speed. During operation, the start indicator light will remain on. To stop, press the stop button. When the water level in the storage tank drops below the low level, the washing pump will stop running. The specific steps for automatic operation mode are as follows: When the mode switch is switched to automatic mode, the washing pump will automatically run at high speed after the device is powered on and the water level in the storage tank is above the high level. During operation, the start indicator light will remain on. When the water level in the storage tank drops below the high level, the washing pump will run at low speed until the water level drops below the low level. (2) The operation of the scrubbing device is divided into three stages: normal operation stage, output disconnection stage and reset stage; The normal operation phase refers to the time when the unmanned crane is in a safe state and the rain sensor detects water pressure. When the water level in the storage tank is above the high level, the wiping device operates at high speed. When the water level in the storage tank drops to between the high and low levels, the wiping device operates at low speed. The output disconnection stage refers to the current circuit of the normal operation stage being cut off when the water level in the storage tank drops below the low level or when the unmanned overhead crane is in an unsafe state. The reset device intervenes, the scrubbing device does not stop immediately, the motor continues to run at low speed, and the reset device follows the turbine to rotate at low speed. The reset phase refers to the low-speed rotation of the reset device during the output disconnection phase. When the copper ring on the reset device rotates to a specific position, the current circuit of the output disconnection phase is cut off. At this time, the DC motor of the wiping device does not stop immediately, but relies on inertia to run for a few seconds before stopping. During this period, the DC motor of the wiping device converts kinetic energy into electrical energy, generating an induced electromotive force, and an induced current is generated in the circuit. The current circuit flows in reverse through the armature of the DC motor of the wiping device, instantly generating a braking torque, causing the wiper blade to stop immediately below the reflector.

8. The method for cleaning the reflector of an unmanned overhead crane according to claim 7, characterized in that: The cleaning device takes into account the operating status of the unmanned overhead crane during operation. The cleaning device is not allowed to operate when the unmanned overhead crane is in operation or about to start operation, in order to prevent the wiper blades from blocking the light beam when swinging.

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