CN201082847Y

CN201082847Y - Crane inclined hanging limitation device

Info

Publication number: CN201082847Y
Application number: CNU200720072617XU
Authority: CN
Inventors: 万隽; 刘映雪
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2007-07-19
Filing date: 2007-07-19
Publication date: 2008-07-09
Anticipated expiration: 2017-07-19

Abstract

The utility model discloses an inclined hoisting limit device for the crane, which comprises a fixing frame, proximity switches, an elastic supporting rack, and a signal controller. The fixing frame adopts a circular ring structure; a plurality of proximity switches are evenly arranged along the circumference of the fixing frame, and penetrated through the fixing frame and connected with the fixing frame; one end of the elastic supporting rack is connected and fixed with the outer wall of the fixing frame; the input terminal of a signal controller is connected to each proximity switch through a signal wire. The limit device operates the real-time monitoring to the lifting hook steel wire rope through the proximity switches, once the inclined hoisting happens, and the control loop of the crane is cut off through the signal controller, to prevent the crane from continuing the inclined hoisting. In addition, the alarm is sent through the alarm, and the correct hoisting direction is indicted through a direction indicator, to ensure the steel wire rope to return the correct position, and ensure the hoisting point and the gravity center of the weight to be on an identical vertical line, thereby avoiding the accidents, protecting the normal operation of the crane equipment, prolonging the service life of the equipment, and increasing the economic efficiency.

Description

Hoisting crane tiltedly hangs restraint device

Technical field

The utility model relates to the safety device of hoisting crane, more particularly, relates to a kind of hoisting crane and tiltedly hangs restraint device, and this restraint device can prevent that hoisting crane from phenomenon taking place tiltedly to hang.

Background technology

When the operation of crane loading weight, generally all the suspension centre of crane hook can be chosen on the center of gravity of weight, and guarantee that the center of gravity of this suspension centre and weight is on the same perpendicular line, thereby guarantee that weight is vertically sling.But in actual mechanical process, owing to crane loading weight existence inclination or because the operating personal misoperation, pull weight firmly and bump and be suspended to obstacle and weight takes place tiltedly to draw, all can cause wire rope inclined hanging, thereby the suspension centre of suspension hook and the center of gravity of weight are not on the same perpendicular line, line traffic control hoisting crane particularly, when taking place tiltedly to hang, be easy to take place steel rope around rolling up, take off the groove accident, not only bring hidden danger to operator safety, but also cause crane facility to damage easily, and both influenced production efficiency, increased maintenance cost again.At present; hoisting crane is provided with various safety devices; comprise superelevation limiting device, limiter of moment, load limiter, armed lever amplitude telltale, suspension hook safety device and rope guide etc.; the safety of preventive device and operating personal when the crane loading weight; but; also do not have at present to be directed to the safety device that hoisting crane tiltedly hangs specially, and be used for preventing hoisting crane tiltedly hang phenomenon.

The utility model content

At the easy generation of above-mentioned hoisting crane that exists in the prior art tiltedly hang, easily cause steel rope around the volume accident, have the shortcoming of potential safety hazard and fragile hoisting crane, the purpose of this utility model provides a kind of hoisting crane and tiltedly hangs restraint device, this restraint device is simple in structure, easy to use, can prevent that hoisting crane from taking place tiltedly to hang, avoid the generation of potential safety hazard.

For achieving the above object, the utility model adopts following technical scheme:

This hoisting crane tiltedly hangs restraint device and comprises fixed mount, and near switch, elastic support and signal controller, fixed mount is the circular ring type structure; Several evenly are provided with near the circumference of switch along fixed mount, and pass fixed mount and fixed mount is connected and fixed; Elastic support one end and fixed mount outer wall are connected and fixed; The input end of signal controller is connected to each near switch by signal wire (SW).

Described fixed mount is provided with opening, and opening part also is provided with nut, and opening connects by nut screwing clamping.

Described quantity near switch is eight.

This restraint device also comprises annunciator and arm for direction indicator, is connected respectively to the mouth of signal controller.

In technique scheme, hoisting crane of the present utility model tiltedly hangs restraint device and comprises fixed mount, and near switch, elastic support and signal controller, fixed mount is the circular ring type structure; Several evenly are provided with near the circumference of switch along fixed mount, and pass fixed mount and fixed mount is connected and fixed; Elastic support one end and fixed mount outer wall are connected and fixed; The input end of signal controller is connected to each near switch by signal wire (SW).This restraint device is by monitoring in real time the suspension hook steel rope of hoisting crane near switch, in case phenomenon takes place tiltedly to hang, cuts off the control loop of hoisting crane immediately by signal controller, prevents that hoisting crane from continuing tiltedly to hang.In addition; also give the alarm and arm for direction indicator indication operating personal lifts by crane by correct direction by annunciator; make steel rope get back to the tram; the center of gravity that guarantees suspension centre and weight is in same perpendicular line; thereby avoided the generation of accident; also protect the normal operation of crane facility, prolonged the service life of equipment, increased economic benefit.

Description of drawings

Fig. 1 is the structural representation that hoisting crane of the present utility model tiltedly hangs restraint device;

Fig. 2 is the structural representation of the fixed mount of restraint device of the present utility model;

Fig. 3 is the schematic top plan view of fixed mount shown in Figure 2;

Fig. 4 is the principle of work scheme drawing near switch of restraint device of the present utility model;

Fig. 5 is the structural representation of the mode of operation of restraint device of the present utility model;

Fig. 6 is the structural representation when taking place tiltedly to hang of restraint device of the present utility model;

Fig. 7 be restraint device of the present utility model bumped the structural representation of hanging when pulling by obstacle;

Fig. 8 is the control circuit schematic diagram of restraint device of the present utility model.

The specific embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

See also shown in Figure 1ly, hoisting crane of the present utility model tiltedly hangs restraint device 10 and comprises fixed mount 11, and near switch 12, elastic support 13 and signal controller 14, please in conjunction with Fig. 2, shown in Figure 3, fixed mount 11 is the circular ring type structure; Several near switch 12 along evenly five equilibrium setting on the circumferencial direction of fixed mount 11, end of probe near switch 12 passes fixed mount 11 inwalls, axle center towards fixed mount 11, and be connected and fixed by screw and fixed mount 11, can adopt the non-shielding of universal two wire system near switch near switch 12, quantity be 8 preferable, lay respectively at east, south, west, north, the southeast, on southwest, northwest, eight directions in northeast, and each is all equal apart from the distance in the axle center of fixed mount 11 near the end of probe of switch 12.Fixed mount 11 is provided with opening 111, and this opening 111 is convenient to installation, dismounting and the maintenance of restraint device 10.Opening 111 places also are provided with the nut (not shown), and opening 111 is tightened connection by nut 112.The lower end of elastic support 13 is connected and fixed by screw tightening or welding manner and fixed mount 11 outer walls; Signal controller 14 can adopt common Programmable Logic Controller (PLC) or micro controller system, and the signal input part of signal controller 14 is connected with eight signal output parts near switch 12 respectively by signal wire (SW) 15.This restraint device 10 also comprises annunciator and arm for direction indicator (not shown), be connected respectively to the signal output part of signal controller 14 by signal wire (SW) 15, need to prove at this, annunciator and arm for direction indicator can be integrated on the same indicator board, and in signal controller 14 is installed in the control housing of hoisting crane 1 (see figure 5).

See also shown in Figure 4ly, be divided into the non-investigative range A of metal, metal detection range of instability B and three zones of metal detection scope service area C near the induction zone of switch 12, metal object D does not work near switch 12 in the non-investigative range A of metal; B when metal object D enters the metal detection range of instability by the non-investigative range A of metal does not still work near switch 12; D is moved further when metal object, and when entering metal detection scope service area C by metal detection range of instability B (this scope generally is made as 14mm), this moment is near switch 12 work.

Please in conjunction with shown in Figure 5, with the cucurbit heavy-duty machine 1 of slinging is example, earlier fixed mount 11 is enclosed within on the steel rope 2 of hoisting crane 1 by the opening 111 on the fixed mount 11 of this restraint device 10, and steel rope 2 is positioned on the axle center of fixed mount 11, be fixed on steel rope 2 rope guides 3 by screw tightening or welding manner upper end then elastic support 13.During work, when the center of gravity of the suspension centre of the suspension hook 4 of this hoisting crane 1 and weight 5 was in same perpendicular line, promptly steel rope 2 was positioned near the non-investigative range of the metal of switch 12, does not work near switch 12, and lifting is operation normally; Bumped by obstacle and hang when pulling (see figure 7) when (see figure 6) or weight 5 take place tiltedly to hang for hoisting crane 1; steel rope 2 near sides near switch 12; if steel rope 2 is further close near switch 12; the numerical value that is the angle a of steel rope 2 and perpendicular line surpasses when lifting by crane angle value safely (this lifts by crane angle value safely and can be provided with according to different situations); near switch 12 work; see also shown in Figure 8; one being example wherein near switch 12a; sense the actual shifts degree and offset direction of steel rope 2 near switch 12a after; normally open contact closure near switch 12a; make the M1 coil get electric adhesive; and make the M1-1 contact closure; automatically send 4 position digital signals and send signal control device to, the action of signal control device internal protection sequence circuit, at this moment; time relay sj 1 coil gets; the time-delay of SJ1 normally closed interlock was opened after two seconds, continued toward tiltedly hanging thereby cut off crane trolley; sudden stop (particularly when the handling weight) is carried out in the dangerous direction action of tiltedly drawing.Also by the indicator board auto alarm and point out out the proper operation direction, have only when the steel rope 2 of suspension hook 4 and get back to the tram in addition, after the center of gravity of suspension centre and weight 5 was in same perpendicular line position simultaneously, hoisting crane 1 can be proceeded normal lifting.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims

1. a hoisting crane tiltedly hangs restraint device, it is characterized in that,

This restraint device comprises fixed mount, and near switch, elastic support and signal controller, fixed mount is the circular ring type structure; Several evenly are provided with near the circumference of switch along fixed mount, and pass fixed mount and fixed mount is connected and fixed; Elastic support one end and fixed mount outer wall are connected and fixed; The input end of signal controller is connected to each near switch by signal wire (SW).

2. hoisting crane as claimed in claim 1 tiltedly hangs restraint device, it is characterized in that:

3. hoisting crane as claimed in claim 1 tiltedly hangs restraint device, it is characterized in that:

Described quantity near switch is eight.

4. hoisting crane as claimed in claim 1 tiltedly hangs restraint device, it is characterized in that: