SU1557078A1 - Tower for servicing upper section of compartments to overhead crane - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, in particular to towers for servicing upper sections of rooms with bridge cranes. The purpose of the invention is to improve the performance characteristics by using a crane truck when using the lifting mechanism. The tower to the bridge crane for servicing the upper parts of the premises contains a telescopic column 3 with a working platform 4 and rigidly interconnected upper and lower 2 frames. Between the upper and lower frames 1 and 2 on the guides 6 there is installed a movable platform 5, which is connected with the lifting mechanism of the crane truck and with the driving hydraulic cylinders 7. The hydraulic accumulator 8 is connected by an oil pipe 12, in which the safety 15 and the return valve 16 are installed with driving hydraulic cylinders 7 and the oil line 19, in which the hydraulic throttle 21 and the shut-off valve 22 are installed with the hydraulic cylinder 18 of the telescopic column 3, and the drain tank 9 is connected to the hydraulic cylinder 18 of the telescopic column 3 via the stop edge 23 and 12 through oil passages 14 and 7 to the drive cylinders via a check valve 17. The 1-yl.

Description

FIELD OF THE INVENTION The invention relates to lifting and transport machinery, namely, bridge cranes.

The purpose of the invention is to improve the performance characteristics by using a crane truck when using the lifting mechanism.

The drawing shows the tower to the bridge crane, a general view.

The tower contains rigidly interconnected upper frame 1 and lower frame 2, telescopic column 3 with working platform 4, platform 5 installed in guides 6, driving hydraulic cylinders 7, hydraulic accumulator 8 and drainage tank 9, Building 10 of driving hydraulic cylinders 7 and guides 6 are rigidly connected to frames 1 and 2, and piston-pistons 11 are rigidly connected to platform 5. The rodless cavities of the driving hydraulic cylinders 7 are hydraulically interconnected according to the type of communicating vessels and, in addition, connected to the hydraulic accumulator 8 oil lines 12 and 13 and with a drain tank 9 oil lines 12 and 14. In this case, a safety valve 15 and a check valve 16 are installed in the oil pipe 12, and a check valve is installed in the oil pipe 14 17. The hydraulic cylinder 18 of the telescopic column 3 is hydraulically connected by oil lines 19 and 13 to the hydraulic accumulator 8, and the oil line 20 with the drain tank 9. In the oil line 19, a hydraulic throttle valve 21 is installed and a porous valve 22 is installed, and a stop valve 23 is installed in the oil pipe 20

The tower works as follows. The tower is installed under the bridge crane 24, Rigging

25platform 5 connects to the hook

26, the truck 27, the shut-off valve 22 is closed. When lifting

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the hook 26, the platform 5 begins to move upward along the guides 6, moving upwards and the piston rod 11. In the rodless drive hydraulic cylinders 7, pressure starts to build up and oil from them along the oil lines 12 and 13 begins to move into the hydroaccumulator 8, charging it. When the pressure in rodless cavities of the driving hydraulic cylinders 7 rises so much that it compensates for the weight of the entire tower, the movement of the platform 5 relative to the guides 6 stops, and as the hook 26 is further raised, the entire tower will rise. When the tower rises to its highest position, the rollers 28 move to the track size of the crane track 24, and the upper frame 1 connects to the load carriage 27. This position of the tower is fixed from below, for example, the housing 10 of the driving cylinders 7 abut the load carriage. Upon further lifting of the hook 26, the rise of the entire tower stops, and the platform 5 will again move upwards along the guides 6 and the piston rods 11 will begin to force the oil out of the rod-free cavities of the driving hydraulic cylinders 7 into the hydraulic accumulator 8, charging it. Excess oil through the safety valve 15 is discharged into the drain tank 9.

The lifting of the working platform 4 takes place when the shut-off valve 23 is closed and the valve 22 is open. In this case, the oil from the hydroaccumulator 8 through the oil lines 13 and 19 enters the hydraulic cylinder 18. The lifting speed of the working platform 4 is regulated by a hydraulic throttle 21. To lower the working platform 4, the shut-off valve 22 is closed and the shut-off valve 23 is opened. Under its own weight, the movable sections of the telescopic column 3 are lowered, the oil is displaced from the hydraulic cylinder 18 through the oil pipe 20 into the drain tank 9. To recharge the accumulator 8, the hook 26 is lowered, the platform 5 under its own weight also lowers, and the oil from the drain tank 9 through the check valve 17, it is sucked into the rodless cavities of the driving cylinders 7. The check valve 16 prevents the oil in the cavities of the driving cylinders 7 in the accumulator 8 from moving. Now, when lifting the platforms We 5 hydroaccumulus 8 will be charged again.

Claims (1)

Invention Formula A tower to an overhead crane for servicing the upper parts of the premises containing rigidly interconnected lower frame and upper frame with a device for connecting to a load crane of an overhead crane, mod 557078 a telescopic column with a working platform and hydraulic extension mechanisms, a hydraulic system and a device for interacting with the load-lifting body of the lifting mechanism of the said trolley, characterized in that 10 to improve performance by using a crane truck when operating the lifting mechanism, it is provided with vertical guides mounted between the frames, a movable platform installed in them connected with a device for interacting with the lifting body, and hydraulic cylinders connected to the upper frame and with the sub 20 the platform, wherein the hydraulic system includes a hydraulic accumulator connected via an adjustable choke with hydraulic mechanisms for extending, which. 25, through the check valves, rodless cavities of the said hydraulic cylinders are hydraulically connected.