CN201217623Y

CN201217623Y - Hook slide braking system of travelling overhead crane winding machine

Info

Publication number: CN201217623Y
Application number: CNU2008203006758U
Authority: CN
Inventors: 魏刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-06
Filing date: 2008-05-06
Publication date: 2009-04-08
Anticipated expiration: 2018-05-06

Abstract

Besides the possession of a contracting brake system with very high safety, a safe crown block shall be able to detect the hook gliding phenomenon the first time and timely stop the phenomenon. The contracting brake system judges whether a hook of a hoist system glides by detecting whether an input shaft of a speed reducer of the hoist system rotates or not when a photoelectric detection part is in operation, thereby controlling whether the normally open contracting brake is electrified and pulled in. A crown block windlass hook gliding brake system is offered, and a detection device mainly comprises photoelectric switches and color codes arranged or coated on the input shaft of the speed reducer. The normally open contracting brake is adopted, and the infrared photoelectric switches are all standard parts which can be purchased directly, so the actual implementation is very convenient.

Description

Overhead traveling crane winch slide hook brake system

Affiliated technical field

The utility model relates to a kind of device of indicating the overhead traveling crane winch occur to slip the hook phenomenon and in time prevent, and has especially adopted often to open the band-type brake system and can effectively improve the safety factor of work.

Background technology

The hoist system of overhead traveling crane partly is made up of lifting motor, retarder, cylinder, band-type brake system etc. at present.The band-type brake system is used for braking winch, and the cover or two that has that the band-type brake system that uses has at present overlaps band-type brakes, all is normally closed band-type brakes.Existing band-type brake system is band-type brake when hook occurring slipping can not be well closed, threatens the safety of personnel and equipment, and do not have good prevention way after the discovery.

Summary of the invention

Can not prevent damnous defective in order to overcome existing band-type brake system timely when occurring slipping the hook phenomenon, the utility model provides a cover to have to slip the band-type brake system that often opens of hook detecting device.Whether this band-type brake system not only can detect the appearance of slide hook phenomenon and prevent, and can detect separately the mode of operation of this system normal timely, improves the safety of overhead traveling crane work.

The technical scheme that the hoist system technical matters that solves the utility model is adopted is: load onto the axle surface colour code different to the infrared reflection rate therewith on the input shaft of hoisting system reductor, with photoelectric switch this sign is detected.When the adhesive of overhead traveling crane main contactor and lifting motor must not electricity, this photodetector system gets electric work, because the deceleration arbor is different with the reflecting rate of colour code, making war when photoelectric switch detects colour code will be closed, close point is opened, so the rotation that photoelectric switch can detect the reductor input shaft whether, thereby can judge whether hoisting system the slide hook has taken place, when the hoisting system electrical motor is not worked and checking system finds that the reductor input shaft rotates, think slide hook phenomenon has taken place, control relay makes often to be left band-type brake and gets electric work, brake wheel is held tightly to prevent slip hook, prevents the generation of safety misadventure.

The beneficial effects of the utility model are, have improved the safety of the winch work of overhead traveling crane, and fairly simple this device of the device of its detection can adopt the novel overhead traveling crane of PLC and frequency converter to be used with some, only need simply change program.Also can be used for the hoist system of old-fashioned overhead traveling crane is transformed, expense is less, and the physical construction of change is simple, and is practical.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model schematic circuit diagram.

QF is the automatic air-break switch that detects automatically among the figure, the main contactor of KM1 Overhead travelling crane system own, and KM2 winder motor contactless switch, the KA1 photoelectric switch, KA2, KA3, KA4, KA5 intermediate relay, KA6 often drives the band-type brake relay, the SB1 hand push button

Fig. 2 is the constructional drawing of installation of the present utility model.

1 winder motor among the figure, 2 normally closed band-type brakes, 3 often open band-type brake, 4 reductors, 5 winch cylinders, 6 drum shaft bearings, 7 photoelectric switchs, 8 detect colour code

The specific embodiment

After the operating personal of overhead traveling crane is ready to, press the start button main contactor adhesive of overhead traveling crane, the KM1 closure of often making war among this moment Fig. 1, whether 3 in can the manual test Fig. 2 of the hand push button among the SB1 often opens the band-type brake system normal, checks and can use after normal.The not adhesive of contactless switch of 1 winder motor among Fig. 2 when the winch of overhead traveling crane does not use, KM2 does not open the photodetector system energising among Fig. 1, begins to detect whether winch moves among Fig. 2.Because the position difference that 5 winch cylinders stop among Fig. 2, when stop position is not just detected by photoelectric switch, KT still thinks it is not to be parked in the colour code position really after getting electric time-delay 0.2s in this position, KA2 gets the electric adhesive closure of often making war, when generation slide this moment hook detected the colour code position, the normal battle of photoelectric switch was closed, and KA3 gets electric adhesive, the KA6 adhesive is often opened band-type brake and is got and electric brake wheel is held tightly, prevents to slip hook; When cylinder is parked in the colour code position, photoelectric switch detects often behind the colour code makes war closedly, and KA4 gets electric adhesive, cylinder rotates the photoelectric switch detection less than colour code when taking place to slip hook, the normally closed point of the photoelectric switch closed KA5 that resets gets electricly, and the KA6 adhesive is often opened band-type brake and got and electric brake wheel is held tightly, prevents to slip hook.During checking system generation problem, can disconnect QF1 checking system dead electricity and not work, the hook that takes place at this moment to slip can use hand push button SB1 control often to open band-type brake, prevents the slide hook.The checking system dead electricity is not worked when the winder motor contactless switch gets electric work.

Because the reductor transmitting ratio of 4 hoisting systems is very big, cylinder has the input shaft of rotation will rotate a few slightly among Fig. 2, thus rotate a steel rope of cylinder when enclosing and in fact have only seldom downslide when photoelectric switch detects input shaft, in the scope of allowing.Because the position of a lot of band-type brakes of kind of overhead traveling crane also is not quite similar, the position that 2 normally closed band-type brakes 3 are often opened band-type brake among Fig. 2 is the relative position of expression and reductor just, and actual use can be changed according to actual conditions.

Claims

1. overhead traveling crane winch slide hook brake system is characterized in that: be made up of photoelectric detection part and Chang Kai band-type brake, photoelectric detection part is made up of the colour code on photoelectric switch and the reductor input shaft.

2. overhead traveling crane winch slide hook brake system according to claim 1, it is characterized in that: colour code that adorn or that be coated with is very different to ultrared reflectivity on the axle surface therewith on the reductor input shaft.

3. overhead traveling crane winch according to claim 1 slips the hook brake system, it is characterized in that: the installation of colour code or tint should be on the input shaft of hoisting system reductor.