JP2006160501A - Failure diagnostic system for crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a failure diagnostic system for a crane capable of continuously operating a facility having a crane apparatus in a stable state by operating the defective crane to retract it and operating an alternative crane over an entire waste pit even if the controller of the crane becomes defective. <P>SOLUTION: In both No. 1 crane and No. 2 crane, breakers 1 with auxiliary contacts are installed in hoist inverters 9a and 9b and hoist brake circuits 10a and 10b. In addition, a snap switch 2 for emergency hoist operation and a magnet switch 3 for power selection are installed in each of the cranes. The hoist operation of the failed No. 1 crane is enabled temporarily by using the hoist inverter 9b on a normal side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a failure diagnosis device for a crane, and in particular, even when a crane control device breaks down, a facility equipped with crane equipment is operated by operating and retreating the failed crane and operating a replacement crane. The present invention relates to a failure diagnosis device for a crane that can be operated in a stable state.

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 failure diagnosis device for a crane, for example, when a failure of a hoisting control device (inverter) is detected and this hoisting control device cannot be recovered, the bucket is hoisted and the crane is not brought to the retreat area. Even if you try to switch to a normal crane, because the broken crane is in the pit, you cannot put garbage into the incinerator (hopper), and even if there is one normal crane, the incinerator As a result, there was a problem that the operation of the plant itself had to be stopped.
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 a considerable amount of labor to wind the bucket manually. There was a problem.

  In view of the problems of the conventional crane failure diagnosis device, the present invention operates and retreats the broken crane even when the crane control device breaks down, and drives the replacement crane over the entire garbage pit. Accordingly, an object of the present invention is to provide a crane failure diagnosis apparatus that can continue operation of a facility equipped with crane equipment in a stable state.

  In order to achieve the above object, the crane failure diagnosis apparatus according to the present invention is an emergency in which an arbitrary control device is switched to a control device of another crane in a crane facility that operates a plurality of cranes by a control device provided for each crane. A switching circuit is provided.

  In this case, the emergency switching circuit can include a breaker with auxiliary contacts, an emergency hoisting operation snap switch, and a power switching magnet switch provided in the hoisting inverter and hoisting brake circuit of each crane.

  Moreover, the crane installation which drives two cranes with the control apparatus provided for every crane can be made into object.

According to the crane failure diagnosis device of the present invention, an emergency switching circuit for switching an arbitrary control device to a control device of another crane is provided in a crane facility that operates a plurality of cranes by a control device provided for each crane. Thus, even when the crane control device fails, the broken crane can be retreated by operating it with another normal crane control device.
And the facility provided with the crane equipment can be operated in a stable state by operating the alternative crane.

  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 switch magnet switch. A hoisting inverter can be used to allow hoisting of a broken crane.

  Embodiments of a crane failure diagnosis apparatus according to the present invention will be described below with reference to the drawings.

1 to 2 show an embodiment of a crane failure diagnosis apparatus of the present invention.
As shown in FIG. 1, this crane facility is operated by a control device in which a No. 1 crane and a No. 2 crane are provided for each crane, and an emergency switching circuit for switching an arbitrary control device to a control device of another crane is provided. 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 1 with auxiliary contact is OFF and the snap switch 2 for emergency hoisting operation is satisfied, OUTX1 is output from the No1 sequencer 11a, 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 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) No1 emergency winding The upper switch lamp lights up, and after the output of OUTX1, the lamp ready for No1 emergency hoisting operation is turned on.
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 the present embodiment is an emergency in which an arbitrary control device 9a is switched to the control device 9b of another crane in the crane equipment operated by the control devices 9a and 9b provided with a plurality of cranes for each crane. Since the switching circuit is provided, even when the control device 9a of the No1 crane fails, the failed No1 crane can be retreated by operating with the control device 9b of the normal No2 crane.
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.

  As mentioned above, although the failure diagnosis apparatus of the crane of the present invention has been described based on the embodiment thereof, the present invention is not limited to the configuration described in the above embodiment. For example, the emergency switching circuit is a hoisting control apparatus. The configuration can be changed as appropriate within a range not departing from the gist of the present invention, for example, it can be installed for other rampages and traveling.

  Even if the crane control device fails, the crane failure diagnosis device according to the present invention operates the evacuated crane and retreats it, and operates an alternative crane to stabilize the facility equipped with the crane equipment. Since it has the characteristic that it can be operated by, it can be used suitably for the use of the facility which needs to operate a crane like a waste disposal plant without a break, for example.

One Example of the failure diagnosis apparatus 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.

Explanation of symbols

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 (3)

  A crane failure diagnosis apparatus characterized in that an emergency switching circuit for switching an arbitrary control device to a control device of another crane is provided in a crane facility that operates a plurality of cranes by a control device provided for each crane.   The emergency switching circuit includes a breaker with auxiliary contacts provided in a hoisting inverter and a hoisting brake circuit of each crane, an emergency hoisting operation snap switch, and a power switching magnet switch. The crane failure diagnosis device described.   The crane failure diagnosis apparatus according to claim 1 or 2, characterized in that crane equipment that operates two cranes by a control device provided for each crane is targeted.

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