SU430046A1 - - Google Patents

Description

one

The invention relates to lifting machinery and can be used directly in pneumatic elevators.

Pneumatic hoists are known, which contain a ram cylinder connected to the air distributor, the rod of which is interconnected with the load gripping body, and the mechanical gear speed controller. cargo:

However, the known structure is complex and does not provide intermediate fixation of the load and smoothness of its movement.

The purpose of the invention is to simplify the construction of the elevator and increase the smoothness of controlling the speed of movement of the load. ,,

This is achieved by the fact that in the proposed lift, the speed regulator of the movement of the load is made in the form of a hydraulic cylinder, the norshep of which is fixed to the rod of the power cylinder, and the piston and sub-piston cavities are connected via a pipeline through the throttle.

FIG. 1 shows the general scheme of the proposed workshop; in fig-; 2 - power cylinder with regulator (M ...

The lift consists of column 1, swing arm 2 and non-drive 3 Pneumatic actuator 3 ON1 & power - cylinder 4 with piston 5 and speed controller 6

cargo, completed in the form of a hydraulic cylinder with a piston 7.

Piston 7 and norshen 5 have a common stock

8. Power cylinder 4 and speed controller 6

cargo movements are separated by a jumper 9.

With rod 8 through blocks 10 connected cargo

hook 11.

Power cylinder 4 has cavities 12 and 13, and regulator 6 has cavities 14 and 15. To control the speed controller, the lift is equipped with a throttle 16, which can be inserted: into the knob 17 of the air distributor 18. The throttle 16 is connected to the cavity 15 with pipe 19 and with a roll of 14 - pipeline

20. The air distributor 18, in turn, is filled with a pipe 21 with a cavity 13 and a pipe 22 with a cavity 12. Compressed air is supplied from the factory network to the air distributor 18 via a pipe 23.

Chemist works as follows.

With the throttle 16 open, the compressed air is directed by the air distributor 18 into the cavity 12, after which the piston 5 moves

to the right. In this case, the piston 7 also moves to the right, the distillate oil from the cavity 15 through the pipeline 19, through the throttle 16 and the pipeline 20 into the cavity 14. At the same time, the load (not shown in the drawing) attached to

the hook 11 and connected to the rod 8 is lowered. Shutting off the throttle 16, the load is fixed in any given position.

To lift the load with the throttle 16 open, the compressed air is directed by the air distributor 18 through the conduit 21 to the cavity 13, and the piston 5 moves to the left, moving together with the rod 8 the piston 7.

At the same time, the oil from the cavity 14 through the pipeline 20, through the throttle 16 and the pipeline 19 is distilled, into the cavity 15. Krkzh 11 with the load rises. When the throttle 16 is completely blocked, the load is fixed in a certain position. By adjusting the cross section of the throttling channel 16, you can smoothly change the speed of lifting or lowering the load.

Subject invention

A pneumatic lift containing a ram cylinder connected to the air distributor, the rod of which is interconnected with a lifting body and regulator (M load movement speed, characterized in that, in order to simplify the lift design and improve the smoothness of the speed control hydraulic cylinder, the piston of which is fixed on the rod of the power cylinder, and nadporschnev and podparshnev cavity connected by pipeline through the throttle.

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