Secondary emergency protection device based on electromagnetic crane

Abstract

The utility model provides a secondary emergency protection device based on an electromagnetic crane. Comprising a device body, and a multifunctional display screen, a switch and an audible and visual alarm are arranged on the front face of the device body; a power switch, an electromagnetic hoist input interface, a charging interface and an electromagnetic hoist output quick plug are arranged on the side surface; an internal circuit is arranged in the device body and comprises a reel power supply, a direct-current power supply, a rectifier bridge, a first fuse, a battery pack, a second fuse, a first direct-current power supply DC, a second direct-current power supply DC, a voltmeter, a first solid-state relay, a diverter, a PLC, a quick-plug positive electrode, a quick-plug negative electrode, a key switch, an acousto-optic buzzer, an electric quantity display and a second solid-state relay. When a magnetic head of the electromagnetic hoist is powered off due to other fault reasons, the PLC detects the power failure and can intervene instantly, it is guaranteed that the electromagnetic hoist does not lose magnetism and a hoisted object does not fall off, the audible and visual alarm warns constructors at the first time, and the constructors have 10 minutes to place the hoisted object in a safe area.

Description

TECHNICAL FIELD

[0001] The utility model relates to the emergency protection in the field of electromagnetic crane, especially based on the secondary emergency protection device of electromagnetic crane. BACKGROUND

[0002] At present, the electromagnetic crane itself has electromagnetic power failure protection system, but when the electromagnetic holding control box to electromagnet front end line is short-circuited or open-circuited, the electromagnetic head will lose magnetic force and cause the hoisting object to fall from high altitude, which may cause hoisting object damage, equipment and facility damage, construction personnel casualties and other consequences, in order to avoid similar safety accidents, the utility model patent is developed. CONTENT OF UTILITY MODEL

[0003] In order to solve the problems existing in the prior art, in view of the electromagnetic crane line short circuit or open circuit during use, the electromagnetic system failure leads to the disappearance of electromagnetic force, the hoisting object is easy to fall accident and causes the safety accident, the application embodiment provides a secondary emergency protection device based on electromagnetic crane. The emergency protection device automatically intervenes when the accident occurs through PLC, ensures that the electromagnetic crane does not lose magnetism and the hoisting object does not fall, at the same time, the audible and visual alarm warns the construction personnel in the first time, the battery storage provides the construction personnel with 10 minutes of time, and the hoisting object is placed in the safe area, so that the falling safety accident after power failure is avoided, and the potential safety accident hidden danger of electromagnetic crane is solved.

[0004] The application embodiment adopts the following scheme to solve the technical problems:

[0005] The secondary emergency protection device based on electromagnetic crane includes a device body, a multifunctional display screen is arranged on the front face of the device body, a switch is arranged on one side of the multifunctional display screen, and an audible and visual alarm is arranged on the other side, forming the state display function and the alarm function of the device;

[0006] A power switch is arranged on the upper part of the side face of the device body, an electromagnetic crane input interface and a charging interface are arranged in sequence below the power switch, and an electromagnetic crane output quick plug is arranged on the lower part of the side face of the device body, for guaranteeing the maintenance and operation of the device;

[0007] An internal circuit is arranged in the device body, the internal circuit includes a drum incoming call, a direct current power supply, a rectifier bridge, a first fuse, a battery pack, a second fuse, a first direct current power supply DC, a second direct current power supply DC, a voltmeter, a first solid state relay, a shunt, a PLC, a quick plug positive and negative pole, a key switch, an audible and visual buzzer, an electric quantity display and a second solid state relay, which jointly complete the processing function of the internal circuit;

[0008] The voltmeter and the battery group provide multifunctional display screen information; the shunt, the first fuse, the second fuse, the first DC power supply and the second DC power supply are used for detecting faults in time; the first solid-state relay, the second solid-state relay and the audible and light alarm keep the power supply and alarm functions of the device; when the magnetic head of the electromagnetic crane is powered off due to other fault reasons, the PLC detects the power-off and can intervene in an instant, supplies power to the electromagnetic crane to keep the necessary magnetic force, and sends out a fault prompt through the audible and light alarm.

[0009] In a preferred embodiment, the power supply and magnetic retention time of the device is 10 minutes.

[0010] In a preferred embodiment, when the total switch is closed, the cab electromagnetic crane starts the lifting operation, and after power-on, the DC power supply of the crane power reel is output through the rectifier bridge, and the positive and negative poles are respectively sent into:

[0011] One way passes through the first solid-state relay, the shunt and the positive pole of the fast plug positive pole to the electromagnet coil of the electromagnet, and the other end of the electromagnet coil outputs to the negative pole to form a loop;

[0012] The other way passes through the first fuse to the DC power supply DC output 24V, and the key switch is used to supply power to the PLC;

[0013] At the same time, the third way is the battery group as a backup power supply, which passes through the second fuse to the DC power supply DC output emergency power 24V to supply power to the PLC;

[0014] When the PLC detects that the crane power line is short-circuited or open-circuited, the PLC detection signal starts immediately, switches to the battery group as a backup power supply, and the second solid-state relay continues to input current to the magnetic head of the electromagnetic crane, at the same time, the audible and light alarm receives the fault signal from the PLC, and the audible and light alarm sends out a sound and light prompt to remind the operator to make emergency treatment.

[0015] In a preferred embodiment, the battery group is a lithium battery.

[0016] In a preferred embodiment, the electromagnetic crane input interface and the electromagnetic crane output fast plug have the advantage of no positive and negative poles, and after the positive and negative DC power supplies from the crane power supply are integrated through the rectifier bridge, they are directly connected to the electromagnetic crane input interface and the electromagnetic crane output fast plug to achieve the anti-reverse connection protection of the device.

[0017] Positive effects:

[0018] 1. The application adopts the technical means that when the PLC detects the short circuit or open circuit of the power supply line of the electromagnetic crane, the PLC detection signal starts immediately, switches to the standby power supply, and the second solid-state relay continues to input current to the magnetic head, preventing the electromagnetic crane from stopping working, and at the same time, the PLC outputs an audible and light buzzer to alarm and prompt the fault, effectively solving the technical problem that when the electromagnetic crane line is short-circuited or open-circuited, the electromagnetic force disappears, causing the hoisted object to fall, and achieving the technical effect of avoiding safety hazards.

[0019] 2. The application adopts the technical means that the battery pack is a lithium battery, effectively solving the technical problem that when the electromagnetic crane line is short-circuited or open-circuited, the electromagnetic force disappears, causing the hoisted object to fall, the device is overall light, charges quickly and efficiently, has large battery capacity, and can be disassembled and installed at any time according to needs, and achieving the technical effect of adapting to different working scenes.

[0020] 3. The application adopts the technical means that the PLC detects overload, undervoltage, and open-circuit or short-circuit state of the electromagnet coil, and simultaneously controls the high-speed second solid-state relay to convert, effectively solving the technical problem that when the electromagnetic crane line is short-circuited or open-circuited, the electromagnetic force disappears, causing the hoisted object to fall, and achieving the technical effect that when an alarm occurs, the emergency power supply can intervene instantaneously.

[0021] 4. The application adopts the technical means that an electromagnetic crane input interface and an electromagnetic crane output quick plug are arranged on the side of the device body, and a rectifier bridge is used to integrate the positive and negative direct current power supply from the crane power supply, the device input power supply has anti-reverse connection protection and has the advantage of not distinguishing between positive and negative poles, effectively solving the technical problem that when the electromagnetic crane line is short-circuited or open-circuited, the electromagnetic force disappears, causing the hoisted object to fall, and achieving the technical effect of simple operation and wide application.

[0022] The electromagnetic crane secondary emergency protection device is suitable for application. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 It is a structure front view of the embodiment;

[0025] Figure 2 It is a structure side view of the embodiment;

[0026] Figure 3 It is the principle block diagram of the electric appliance of the embodiment;

[0027] Figure 4 It is the PLC control principle block diagram of the embodiment.

[0028] In the figure, 1. power switch, 2. charging interface, 3. electromagnetic crane input interface, 4. electromagnetic crane output quick plug, 5. switch, 6. multifunctional display screen, 7. audible and visual alarm, 8. drum incoming call, 9. DC power supply, 10. rectifier bridge, 11. first fuse, 12. battery pack, 13. second fuse, 14. first DC power supply DC, 15. second DC power supply DC, 16. voltmeter, 17. first solid-state relay, 18. shunt, 19. PLC, 20. positive and negative poles of quick plug, 21. key switch, 22. audible and visual buzzer, 23. electric quantity display, 24. second solid-state relay. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0030] As shown in the figure, the electromagnetic crane secondary emergency protection device based on the electromagnetic crane includes a device body, a multifunctional display screen 6 is arranged on the front face of the device body, a switch 5 is arranged on one side of the multifunctional display screen 6, and an audible and visual alarm 7 is arranged on the other side, forming the state display function and the alarm function of the device;

[0031] A power switch 1 is arranged on the upper part of the side face of the device body, an electromagnetic crane input interface 3 and a charging interface 2 are arranged in sequence below the power switch 1, and an electromagnetic crane output quick plug 4 is arranged on the lower part of the side face of the device body, for guaranteeing the maintenance and operation of the device;

[0032] An internal circuit is provided inside the device body, and the internal circuit includes a reel call 8, a DC power supply 9, a rectifier bridge 10, a first fuse 11, a battery pack 12, a second fuse 13, a first DC power supply DC14, a second DC power supply DC15, a voltmeter 16, a first solid-state relay 17, a shunt 18, a PLC 19, a quick-connect positive and negative electrode 20, a key switch 21, an audible and visual buzzer 22, a power display 23, and a second solid-state relay 24, which together complete the processing function of the internal circuit;

[0033] Among them, the voltmeter 16 and the battery pack 12 provide information on the multi-function display screen; the shunt 18, the first fuse 11, the second fuse 13, the first DC power supply DC14 and the second DC power supply DC15 are used to detect faults in a timely manner, and the first solid-state relay 17, the second solid-state relay 24 and the sound and light buzzer 22 maintain the power supply and alarm function of the device; when the magnetic head of the electromagnetic crane is powered off due to other faults, the device can detect it through PLC19 and intervene instantly to supply power to the electromagnetic crane to maintain the proper magnetic force to prevent the hoisted objects from falling off, and at the same time issue a fault prompt through the sound and light alarm 7.

[0034] The device's power supply and magnetization time is 10 minutes. During this time, the hoisted objects can be placed stably in a safe area to prevent safety accidents.

[0035] In the internal circuit, when the main switch is closed, the electromagnetic crane in the cab starts the hoisting operation. After power is turned on, the DC power supply 9 of the crane power drum 8 is output through the rectifier bridge 10 with fixed positive and negative poles respectively fed into:

[0036] All the way through the first solid-state relay 17, the shunt 18 and the positive pole of the quick-plug positive and negative pole 20 to the electromagnetic coil of the electromagnet, and output from the other end of the electromagnetic coil to the negative pole to form a loop;

[0037] Another path passes through the first fuse 11 to the DC power supply DC14 to output 24V, which is then transmitted to the PLC19 through the key switch 21. At this time, the PLC19 can detect the overload, undervoltage, open circuit or short circuit status of the electromagnetic crane before operation, as well as the power level of the battery pack 12 provided by the power display 23;

[0038] At the same time, the third battery pack 12 as a backup power source outputs an emergency power supply 24V through the second fuse 13 to the DC power supply DC15 to supply power to the PLC19. At this time, the electromagnetic crane performs normal lifting operations;

[0039] When the PLC 19 detects a short circuit or open circuit of the crane power supply line, the PLC 19 detection signal is immediately started, switched to the backup power supply battery pack 12, the second solid-state relay 24 continues to input current to the electromagnetic crane head, prevents the electromagnetic crane from stopping working, at the same time, the audible and light buzzer 22 receives the fault signal from the PLC 19, at this time, the audible and light alarm 7 emits sound and light to remind the operator to make emergency treatment.

[0040] The battery pack 12 is a lithium battery.

[0041] The electromagnetic crane input interface 3 and the electromagnetic crane output quick plug 4 have the advantage of not distinguishing between positive and negative poles, and after the positive and negative DC power supply 9 from the crane power supply is integrated through the rectifier bridge 10, it is directly connected to the electromagnetic crane input interface 3 and the electromagnetic crane output quick plug 4 to achieve the anti-reverse connection protection of the device.

[0042] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:

[0043] Since when the PLC 19 detects a short circuit or open circuit of the crane power supply line, the PLC 19 detection signal is immediately started, switched to the backup power supply, the second solid-state relay 24 continues to input current to the electromagnetic crane head, prevents the electromagnetic crane from stopping working; at the same time, the PLC 19 outputs the audible and light buzzer 22 to alarm and prompt a fault, therefore, the device can avoid the occurrence of safety hazards, and safeguards the safety of the board, equipment, facilities and personal safety.

[0044] Since the battery pack 12 is a lithium battery, the device is overall light, fast and efficient in charging, has large battery capacity, and can be disassembled and installed at any time according to needs, and is suitable for different working scenes.

[0045] Since the device uses the PLC 19 to detect overload, undervoltage, open or short circuit state of the electromagnet coil, and simultaneously controls the conversion of the high-speed second solid-state relay 24, therefore, when an alarm occurs, the emergency power supply can intervene instantaneously.

[0046] Since the electromagnetic crane input interface 3 and the electromagnetic crane output quick plug 4 are arranged on the side of the device body, and the positive and negative DC power supply 9 from the crane power supply is integrated through the rectifier bridge 10, therefore, the input power supply of the device has anti-reverse connection protection, has the advantage of not distinguishing between positive and negative poles, and the operation is more convenient, and the application is more widely.

[0047] The working process of the embodiment is as follows:

[0048] The method for applying the secondary emergency protection device based on the electromagnetic crane comprises the following steps:

[0049] First, the electromagnetic plug of the electromagnetic crane itself is inserted into the electromagnetic crane input interface 3 and the electromagnetic crane output quick plug 4 of the device, and then the power switch 1 is turned on.

[0050] Second step: by key insertion switch 5, by the multifunctional display screen 6 display current electromagnetic crane state information, including electromagnet coil open circuit or short circuit state, by the amount of electricity display 23 to view the device power, voltmeter 16 display the current voltage;

[0051] Third step: when starting construction, the construction personnel start electromagnetic crane to start hoisting operation, from the drum to the DC power supply 9 output fixed positive and negative respectively into: one way through the first solid state relay 17, shunt 18, fast plug positive and negative 20 positive to the electromagnet coil of electromagnet, from the other end of the electromagnet coil output to the negative to form a loop; another way through the first insurance 11 to DC power supply DC 14 output 24V through the key switch 21 to the PLC 19 power supply, at this time, the PLC 19 detects the overload, undervoltage, electromagnet coil open circuit or short circuit state before the electromagnetic crane works, and the power of the battery pack 12 provided by the power display 23; at the same time, the third way as a backup power supply battery pack 12 through the second insurance 13 to the DC power supply DC 15 output emergency power 24V to the PLC 19 power supply; when the PLC 19 detects the crane power line short circuit or open circuit, the PLC 19 detection signal starts immediately, switches to the backup power supply battery pack 12 work, continues to input current to the magnetic head of the electromagnetic crane through the second solid state relay 24, prevents the electromagnetic crane from stopping working, the PLC 19 outputs the sound and light buzzer 22 to alarm and prompt the fault, the sound and light alarm 7 sends out sound and light to remind the operator to make emergency treatment, at this time, the operator gets the information to make emergency response, and prevents the hoisting object to the safe area, avoiding the safety accident of hoisting operation construction;

[0052] Fourth step: when the hoisting operation is finished, check the information display in the multifunctional display screen 6, if the power display 23 displays that the power is too low, connect the charging interface 2 to charge, if the power display 23 displays that the power is sufficient, turn off the power switch 1 and pull out the key to close the switch 5;

[0053] Fifth step: pull out the electromagnetic crane input interface 3 and the electromagnetic crane output fast plug 4 of the electromagnetic crane itself, and properly store the device.

[0054] In summary, the device not only has emergency protection measures in the construction process, but also can detect the state information of the electromagnetic crane before construction, so the device can play a role in avoiding the safety risk in the field of electromagnetic crane. The circuit principle and design concept of the device also have certain reference value for other fields.

[0055] It should be pointed out that the content not described in detail in the specification is all the prior art known to those skilled in the art, and the model parameters of the sound-light alarm 7, the voltmeter 16 and the PLC 19 are not specifically limited, and can be determined by using conventional equipment. In the technical solution, the electric appliance control elements not mentioned belong to the prior art, and therefore are not shown in the figure and will not be described here.

[0056] Finally, it should be pointed out that the above description is only the preferred embodiment of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. Based on the electromagnetic crane secondary emergency protection device, its characteristics are: The device comprises a main body, a multifunctional display screen (6) is provided on the front of the main body, a switch (5) is provided on one side of the multifunctional display screen (6), and an audible and visual alarm (7) is provided on the other side, forming a status display function and an alarm function of the device; A power switch (1) is provided on the upper side of the device body, an electromagnetic crane input interface (3) and a charging interface (2) are arranged in sequence below the power switch (1), and an electromagnetic crane output quick plug (4) is provided on the lower side of the device body to ensure maintenance and operation of the device; An internal circuit is provided inside the device body, and the internal circuit includes a reel call (8), a DC power supply (9), a rectifier bridge (10), a first fuse (11), a battery pack (12), a second fuse (13), a first DC power supply (14), a second DC power supply (15), a voltmeter (16), a first solid-state relay (17), a shunt (18), a PLC (19), a quick-connect positive and negative electrode (20), a key switch (21), an audible and visual buzzer (22), a power display (23) and a second solid-state relay (24), which together complete the processing function of the internal circuit; Among them, the voltmeter (16) and the battery pack (12) provide information on the multi-function display screen; the shunt (18), the first fuse (11), the second fuse (13), the first DC power supply DC (14) and the second DC power supply DC (15) are used to detect faults in a timely manner, and the first solid-state relay (17), the second solid-state relay (24) and the sound and light buzzer (22) maintain the power supply and alarm function of the device; when the magnetic head of the electromagnetic crane is powered off due to other faults, the PLC (19) detects it and intervenes instantly to supply power to the electromagnetic crane to maintain the proper magnetic force, and at the same time issues a fault prompt through the sound and light alarm (7).

2. The electromagnetic crane-based secondary emergency protection device according to claim 1 is characterized in that: The power supply magnetization time of the device is 10 minutes.

3. The electromagnetic crane-based secondary emergency protection device according to claim 1 is characterized in that: In the internal circuit, when the main switch is closed, the electromagnetic crane in the cab starts the hoisting operation. After power is turned on, the DC power supply (9) of the crane power drum (8) is output through the rectifier bridge (10) with fixed positive and negative poles respectively sent to: The circuit passes through the first solid-state relay (17), the shunt (18) and the positive pole of the quick-connect positive and negative poles (20) to the electromagnetic coil of the electromagnet, and is output from the other end of the electromagnetic coil to the negative pole to form a loop; Another path passes through the first fuse (11) to the DC power supply DC14 to output 24V and is transmitted to the PLC (19) through the key switch (21) for power supply; At the same time, the third battery pack (12) serving as a backup power source outputs an emergency power supply 24V to the DC power supply DC15 through the second fuse (13) and transmits it to the PLC (19). When the PLC (19) detects that the crane power line is short-circuited or open-circuited, the PLC (19) detects a signal and immediately starts to switch to the backup power supply battery pack (12). The second solid-state relay (24) continues to input current to the magnetic head of the electromagnetic crane. At the same time, the sound and light buzzer (22) receives a fault signal from the PLC (19). At this time, the sound and light alarm (7) emits sound and light to remind the operator to take emergency measures.

4. The electromagnetic crane-based secondary emergency protection device according to claim 1 is characterized in that: The battery pack (12) is a lithium battery.

5. The electromagnetic crane-based secondary emergency protection device according to claim 1 is characterized in that: The electromagnetic crane input interface (3) and the electromagnetic crane output quick plug (4) have the advantage of not distinguishing between positive and negative poles. After the positive and negative poles of the DC power supply (9) from the crane power supply are integrated through the rectifier bridge (10), they are directly connected to the electromagnetic crane input interface (3) and the electromagnetic crane output quick plug (4) to achieve the anti-reverse connection protection of the device.

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