CN2383828Y - Pipe crane - Google Patents

Abstract

The utility model provides a pipe crane which uses a hydraulic pressure telescopic movable counterweight (3) replacing an original four-link type movable counterweight. An emergency free down loading device (5) is additionally arranged. The moment automatic balancing of the hydraulic pressure telescopic movable counterweight (3) can be realized under the control of a microcomputer control device, when the counterweight is extended outwards, the emergency free down loading device can not descend. When the eccentric load is generated by the pipe crane, and the eccentric load emergency can not deterred by starting an emergency brake device, the suspended weight is emergently and freely put downwards to the ground by the emergency free down loading device (5). Thus The utility model has the characteristics that the work can be conducted in a narrow or a complicated terrains, the work safety can be enhanced, etc.

Description

Novel pipe hanger

The utility model is a kind of construction machinery and equipment that is used for the large-scale pipeline construction.

At present, the pipe sling that uses in the domestic pipeline construction (being pipe-laying-out machine), its counterbalanced weight majority is a fixed type, and motoring condition is laid particular stress on greatly, and balancing torque is little during work.In recent years, also produced the pipe sling of minority employing moving counterweight, its movable device is a four-bar linkage, realizes automatic moment balance adjustment by moment sensing computer processor, solenoid electric valve.But this four link type moving counterweight can not narrow and small or complicated landform carry out operation at operating zone.Because when moving counterweight was put outward, counterweight moved down simultaneously, when putting to outermost point, the ground Clearance of counterweight is very little, and when pipe sling was constructed, the soil that trench digging is dug out was deposited in from ditch nearby, and mound has brought very big inconvenience with regard to the operation of giving pipe sling.In addition, pipe sling is tumbled for preventing the pipe sling unbalance loading when operation, all designed emergency braking apparatus, that is, when pipe sling is sling pipeline operations, when unbalance loading reaches critical conditions, emergency braking apparatus sends general alarm, the while emergency braking, at this moment, operating personal passes through imperative operation, to secure side to operating, to remove the excessive phenomenon of unbalance loading.But pipe sling often is to carry out operation on the raceway groove side of just having excavated, having pine to fall into phenomenon during the ground of limes marginis takes place, pipe sling can fall into run-off the straight because of the ground pine, cause unbalance loading, behind emergency braking, ground still continues to sink, and certainly will cause machine to turn over the grave accident generation that the people dies, and domestic various pipe slings does not still have a kind of generation that prevents to turn over the machine accident at this emergency safety device in emergency circumstances at present.

For overcoming above-mentioned shortcoming, this reality is novel to be provided a kind of hydraulic telescopic type moving counterweight and has additional urgent novel pipe hanger of freely transferring device, makes it can be in narrower and small area or than the complex-terrain operation, and improves operational security.

The utility model is to carry out improvedly on the basis of the pipe sling of four link type moving counterweight, changes the four link type moving counterweight into the hydraulic telescopic type moving counterweight, and has set up the urgent device of freely transferring.The hydraulic telescopic type moving counterweight is made up of support, active box, telescopic oil cylinder, bidirectional hydraulic lock, counterweight etc.Active box is contained in the fixed case of support, and connect with counterweight, telescopic oil cylinder is contained in the active box, and connect with the hydraulic efficiency pressure system of pipe sling, telescopic oil cylinder drives active box, make the counterweight translation flexible, and telescopic oil cylinder is to carry out work under the control of computer processor, realizes self-equalizing moment.Promptly freely transfer device and form, urgent joystick control change-over valve, the clutch oil cylinder in the change-over valve controlled hydraulic system, on winch by urgent joystick, change-over valve.After unbalance loading take place, starting emergency braking apparatus, still can not prevent, when overturning danger, the operator can operate urgent joystick, by change-over valve, make the pressure oil of the accumulator in the hydraulic efficiency pressure system stop to supply with clutch oil cylinder, this moment, power-transfer clutch was opened, reel is not subjected to HYDRAULIC CONTROL SYSTEM, just can turn round automatically, weight is under its action of gravity, and urgent free fall is to ground, arm no longer bears a heavy burden, unbalance loading is removed, alleviated pipe sling, just can prevent to turn over the generation of machine accident ground-surface unbalance loading pressure.

Introduce the utility model in detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model scheme drawing;

Fig. 2 is the utility model hydraulic telescopic type moving counterweight scheme drawing;

Fig. 3 is the urgent device oil circuit scheme drawing of freely transferring of the utility model.

The utility model by caterpillar chassis (1), frame (2), arm (6), lifting mechanism (7), luffing mechanism (4), moving counterweight (3), hydraulic efficiency pressure system, computer control device, lifting hook pulley group (8), promptly freely transfer device (5) etc. and form.

Moving counterweight of the present utility model (3) is the hydraulic telescopic type moving counterweight, is made up of support (31), active box (34), telescopic oil cylinder (33), bidirectional hydraulic lock (32), counterweight (36) etc.Support (31) is installed on the frame (2), and the middle part of support (31) is provided with fixed case (35), and active box (34) is contained in the fixed case (35), and an end of active box (34) stretches out support (31) and connects with counterweight (36).Telescopic oil cylinder (33) is contained in the active box (34), and the piston of telescopic oil cylinder (33) connects with active box (34), and the cylinder body of telescopic oil cylinder (33) connects with fixed case (35).Bidirectional hydraulic lock (32) is contained on the telescopic oil cylinder (33), on active box (34) limiting device etc. is housed also, and overhanging to terminal the time when counterweight (36), limiting device triggers travel switch, and counterweight (36) is no longer overhanging.Telescopic oil cylinder (33) is subjected to the control of computer control device and hydraulic efficiency pressure system, when pipe sling carries out the operation of work stringing, torque sensor in the computer control device is given computer processor with moment information, computer processor sends instruction to solenoid electric valve, solenoid electric valve control telescopic oil cylinder (33), it is flexible that telescopic oil cylinder (33) drives counterweight (36) translation by active box (34), realize self-equalizing moment, counterweight (36) is when translation is overhanging, counterweight (36) highly can not descend, therefore, pipe sling is not subjected to the influence of limes marginis mound when operation, make the swing pipe function than tang, carry out operation than complex-terrain.

The urgent device (5) of freely transferring of the present utility model is made up of urgent joystick (51), change-over valve (52) etc.Urgent joystick (51) is located in the operator's compartment, urgent joystick (51) connects with change-over valve (52), change-over valve (52) is installed between the energy storage (9) and the clutch oil cylinder (10) on the winch in the hydraulic efficiency pressure system, during normal operation, the pressure oil of energy storage (9) is through change-over valve (52) control clutch oil cylinder (10), when needs start urgent when freely transferring device (5), operating personal is operated urgent joystick (51), drive change-over valve (52), change-over valve (52) makes energy storage (9) emptying, cut off the oil circuit of energy storage (9) with clutch oil cylinder (10), this moment, power-transfer clutch was opened, the reel of winch no longer is subjected to clutch control, and is just free to rotate, and winch is under the action of gravity of lifted weight, freely put rope rapidly, the lifted weight free fall is put to ground, thereby unbalance loading is removed, prevented that the grave accident of the machine that turns over from taking place.Also can be according to customer requirement, the available urgent pedal of urgent joystick (51) replaces, and the available foot valve of change-over valve (52) replaces, and when needs start promptly when freely transferring device (5), operating personal is fit well to be tracked tramping anxious pedal and just can.

As previously mentioned, because the utility model improves the moving counterweight of pipe sling, adopted hydraulic telescopic type moving counterweight (3), replaced the four link type moving counterweight, and set up the urgent device (5) of freely transferring, therefore, the utility model is except the characteristics of the pipe sling that possesses the four link type moving counterweight: rationally distributed, in light weight, easy and simple to handle, self-equalizing moment is big, outside the advantages such as work efficiency height, also having can be in less area, than the complex-terrain operation; And have additional the urgent device (5) of freely transferring, improved the characteristics such as safety of operation.

Claims (1)

1. A kind of by caterpillar chassis (1), frame (2), arm (6), lifting mechanism (7), luffing mechanism (4), moving counterweight (3), hydraulic efficiency pressure system, computer control device, the novel pipe hanger that lifting hook pulley group (8) is formed, it is characterized in that said moving counterweight (3) is the hydraulic telescopic type moving counterweight, include support (31), active box (34), telescopic oil cylinder (33), bidirectional hydraulic lock (32), counterweight (36), the middle part of support (31) is provided with fixed case (35), active box (34) is contained in the fixed case (35), one end of active box (34) stretches out support (31) and connects with counterweight (36), telescopic oil cylinder (33) is contained in the active box (34), the piston of telescopic oil cylinder (33) connects with active box (34), the cylinder body of telescopic oil cylinder (33) connects with fixed case (35), and bidirectional hydraulic lock (32) is contained on the telescopic oil cylinder (33):

   The utility model has also been set up the urgent device (5) of freely transferring and has been included urgent joystick (51), change-over valve (52), urgent joystick (51) is located in the operator's compartment, urgent joystick (51) connects with change-over valve (52), and change-over valve (52) is installed between the energy storage (9) and the clutch oil cylinder (10) on the winch in the hydraulic efficiency pressure system.

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