JP4749705B2 - Emergency switching device in case of crane failure - Google Patents

Description

  The present invention relates to an emergency switching device at the time of a crane failure, and in particular, even when a crane control device fails, the crane is provided with a crane facility by operating and retracting the failed crane and operating a replacement crane. The present invention relates to an emergency switching device in the event of a crane failure that can operate a stable facility.

For example, as shown in FIG. 1, two cranes are provided for switching in a crane facility used in a garbage disposal site.
In such crane facilities, stable operation is usually performed at a rate of once every 15 to 20 minutes by grabbing the garbage with the crane bucket, hoisting, traversing, running, opening and closing, and putting the garbage into the hopper. It is necessary to do.

By the way, in the conventional crane, for example, when a failure of the hoisting control device (inverter) is detected and this hoisting control device cannot be recovered, it is normal that the bucket is hoisted and the crane is not moved to the evacuation area. Even if you try to switch to a crane, there is a broken crane in the pit, so it is not possible to put garbage into the incinerator (hopper), and even if there is one normal crane, the incinerator and therefore the plant There was a problem that it had to stop driving itself.
In order to temporarily evacuate the bucket, it was only possible to install a winch on the ceiling of the landfill and to wind the winch on the bucket. However, there is considerable labor for the current situation. There was a problem.

  In view of the problems of the above-mentioned conventional crane, the present invention operates the crane with the broken crane even when the crane control device breaks down, and operates the alternative crane over the entire garbage pit to An object of the present invention is to provide an emergency switching device in the event of a crane failure that can keep the facility equipped with facilities in a stable state.

In order to achieve the above object, the emergency switching device at the time of crane failure according to the present invention is a crane facility that operates two cranes for each crane by a control device provided for each crane . in the hoisting brake circuit for performing hoisting inverter and hoisting brake operation for performing, breaker with auxiliary contacts said hoisting inverter disconnects the circuit when a fault, the sequencer of the other crane contact signals of the sequencer of one of the cranes An emergency switching circuit including an emergency hoisting operation snap switch for connecting the cut circuit so as to be taken in and a power switching magnet switch that is turned on by the sequencer of the other crane with the contact signal ; By switching the emergency switching circuit, one crane hoisting inverter is used and the other crane hoisting Thereby enabling rolling, by connecting between both cranes sequencer optical link cable, the controller for operation of both cranes, that through the sequencer, enabling the operation of the other cranes Features.

  According to the emergency switching device at the time of the failure of the crane of the present invention, even if the crane control device fails, the facility equipped with the crane equipment is operated by operating the failed crane with another normal crane control device. Can be operated in a stable state.

In this case, the emergency switching circuit includes a breaker with an auxiliary contact provided in the hoisting inverter and hoisting brake circuit of each crane, an emergency hoisting operation snap switch, and a power switching magnet switch, By switching, one crane hoisting inverter can be used, and the other crane hoisting operation can be performed, so that a normal crane hoisting inverter can be used to allow hoisting operation of a broken crane. can do.
Further, by connecting the sequencers of both cranes with an optical link cable, the operation of the other crane can be enabled by the controller of both cranes.

  Hereinafter, an embodiment of an emergency switching device at the time of failure of a crane according to the present invention will be described based on the drawings.

1 to 2 show an embodiment of an emergency switching device when a crane of the present invention fails.
As shown in FIG. 1, this crane facility is operated by a control device in which a No1 crane and a No2 crane are provided for each crane, and the following emergency switching circuit is provided.

  As an emergency switching circuit, for example, as shown in FIG. 2, in both No. 1 crane and No. 2 crane, breaker 1 with auxiliary contacts is provided for hoisting inverters (control devices) 9a, 9b and hoisting brake circuits 10a, 10b. In addition, the emergency hoisting operation snap switch 2 and the power switching magnet switch 3 are provided, and the hoisting operation of the failed No1 crane can be temporarily performed by using the hoisting inverter 9b on the normal side. To.

For example, when the No. 1 crane hoisting inverter 9a fails, both the No. 1 crane and the No. 2 crane turn off the breaker 1 with auxiliary contacts. As a result, the auxiliary contact signals INT11, INT12, INT21, and INT22 of the breaker 1 that is normally ON are turned OFF.
Then, the emergency hoist operation snap switch 2 in the No. 1 control panel, which is normally OFF, is turned ON, and taken into the No. 1 sequencer 11a.

When the condition that the breaker with auxiliary contact 1 is OFF and the emergency hoist operation snap switch 2 is satisfied, OUTX1 is output from the No1 sequencer 11a, and this contact signal is taken into the No2 sequencer 11b, and with this signal, the No2 sequencer 11b Outputs OUT21 and OUT22, the auxiliary relays Y1 and Y2 are turned ON, and the magnet switch 3 is turned ON to the No2 side.
Thereby, it switches to the hoisting inverter 9b and hoisting brake circuit 10b by the side of No2 crane, and the operation of the controller 4 or the touch panel 5 raises the bucket of No1 crane temporarily, and has made this No1 crane retractable state. .
Further, by providing the optical link cable 8 or the like between the sequencers 11a and 11b, an operation from the failed controller 6 or the touch panel 7 is also possible.

FIG. 3 shows an example of the operation screen.
(1) No1 hoisting brake breaker OFF lamp lights when brake breaker is turned off (2) No1 hoisting inverter breaker OFF lamp lights when inverter breaker is turned off (3) No1 emergency hoisting switch lamp lights up when emergency hoisting operation switch is turned on (4 ) The No1 emergency hoisting switch lamp lights up, and after the output of OUTX1, the lamp ready for No1 emergency hoisting operation is lit up.
(5) The hoisting operation can be performed by operating the hoisting / lowering buttons.
(6) After hoisting the bucket, the crane can be moved to the standby position by manually releasing the traverse and running brakes and pushing them manually by maintenance personnel.

As described above, the crane equipment of this embodiment is an emergency switch that switches the control device 9a to the control device 9b of another crane in the crane equipment that is operated by the control devices 9a and 9b provided with two cranes for each crane. Since the circuit is provided, even when the control device 9a of the No1 crane fails, the failed No1 crane can be evacuated by operating with the normal No2 crane control device 9b.
And by operating a No2 crane instead, the facility provided with the crane equipment can be operated in a stable state.

  The emergency switching circuit includes a breaker 1 with auxiliary contacts provided in the hoisting inverters 9a, 9b and hoisting brake circuits 10a, 10b of each crane, an emergency hoisting operation snap switch 2, and a power switching magnet switch 3. By using the normal side hoisting inverter 9b, the hoisting operation of the failed No1 crane can be enabled.

In the crane equipment of the present embodiment, the emergency switching circuit is provided in the hoisting control device having a high failure frequency. In this case, the following operations (1) to (4) are performed. Like that.
(1) After emergency switching, the grab bucket of the broken crane is hoisted using the power of the normal crane.
(2) Return emergency switching to the original position, run the broken crane and move it to the evacuation area.
(3) At this time, if not only the hoisting circuit but also the traveling circuit has failed, the crane is boosted by the normal crane and moved to the retreat area.
(4) Responsible for the operation of the entire pit (except the evacuation area of the broken crane) with a normal crane.
In the case of lateral running, even if the failure frequency is significantly lower than that of hoisting, it can be moved by boosting operation. In this case, there is an advantage that there is no fear of a collision with the peripheral wall because the lateral travel can be switched and the rearward movement is not performed to move to the retreat area.

  The emergency switching device at the time of failure of the crane according to the present invention has been described based on the embodiment. However, the present invention is not limited to the configuration described in the above embodiment. The configuration can be appropriately changed within a range not departing from the gist of the invention, for example, it can be installed for a traversal or traveling other than the upper control device.

  The emergency switching device at the time of failure of the crane according to the present invention can operate a facility equipped with crane equipment by operating and retracting the failed crane even when the crane control device fails. Since it has the characteristic that it can be operated in a stable state, it can be suitably used, for example, for facilities that require a crane such as a waste disposal plant to operate without holidays.

One Example of the emergency switching apparatus at the time of the failure of the crane of this invention is shown, (a) is sectional drawing, (b) is a top view. It is a circuit diagram which shows an example of an emergency switching circuit. It is a figure which shows an example of an operation screen.

DESCRIPTION OF SYMBOLS 1 Breaker with auxiliary contact 2 Snap switch for emergency hoisting operation 3 Magnet switch for power switching 4 Controller 5 Touch panel 6 Controller 7 Touch panel 8 Optical link cable 9a Hoisting inverter 9b Hoisting inverter 10a Hoisting brake circuit 10b Hoisting brake circuit 11a Sequencer 11b Sequencer

Claims (1)

In crane equipment that operates two cranes by a control device provided for each crane, the hoisting inverter that performs hoisting operation of each crane of the control device and the hoisting brake circuit that performs hoisting brake operation , Breaker with auxiliary contact that cuts the circuit when the hoisting inverter fails , snap switch for emergency hoisting operation that connects the cut circuit so that the contact signal of the sequencer of one crane is taken into the sequencer of the other crane And an emergency switching circuit having a power switching magnet switch that is turned on by a sequencer of the other crane with the contact signal, and using the crane hoisting inverter by switching the emergency switching circuit, The crane can be hoisted and the optical link between the sequencers of both cranes By connecting Bull, by the controller operating the both of the crane, through the sequencer, emergency switching device when a failure of the crane, characterized in that to enable operation of the other crane.

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