SU438465A1 - Pipe drum - Google Patents

Description

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The invention relates to pipe-and-wrap production, in particular, to drum-type pipe-wiping mills for coil-drawing pipes.

Pipe-and-roll mills are known in which the pipe-and-roll drum contains mites, scissors for cutting the grippers and in which the operation of cutting the grippers is carried out directly on the drum by a scissors control system with a pulse from the limit switch.

In order to automatically control the operations, the clamps cut and release the cut end of the pipe, part of the working surface of the described tubing drum is made in the form of a spring-loaded ruler, which interacts with a limit switch installed under this ruler, which, depending on the position of the deadline, commands the pneumo-hydraulic scissors control system, according to with which the pipe is pressed against the drum at the required moments of the drag, the gripper is cut off and the pipe is released.

FIG. 1 shows a general view of the drum and control circuit; in fig. 2 is a plan view of a hydraulic shears; in fig. 3 - view of hydraulic shears in two positions: initial (thin lines) and in position for cutting.

Hydraulic shears 2, a pneumatic cylinder of rotation 3, are mounted on the drawing drum 1, which, by means of a lever system 4, moves the hydroscissors along guides 5.

Hydropneumatic amplifier 6 mounted on a drawing drum connected by a piping system to a pneumatic distributor

7 pneumatic limit switches

8 and 9, pneumatic time relays 10 form a pneumatic-hydraulic control system for hydraulic shears, which are connected to it by pipelines. A cylinder of rotation 3 of the shears is connected to the distributor. The compressed air is supplied to the system through the rotating shaft 12.

Pliers 13 are installed on the drum to grip the front end of the pipe. The drum rotates from the actuator 14.

On the drum surface there is a spring-loaded ruler 15, under which the pneumatic limit switch 8 is installed.

The shears 2 are provided with an abutment 16 for clamping the pipe against the drum and a movable knife 17 which makes the pipe cut.

Hydropneumatic amplifier 6 has a piston 18.

Tubovolochilny drum works as follows.

The tongs 13 grip the front end of the pipe, which is wound onto the rotating drum. At this time, the shears are in the initial position, i.e. they are raised above the pipe. When the coil of the pipe wound on the drum reaches the ruler 15 and presses it, the ruler, lowering to the level of the drum surface, acts on the limit switch 8, which gives a command to the cylinder 3 of the hydraulic shears through the distributor 11 time relay 10, the distributor 7 and hydropneumatic booster 6.

As a result, the cylinder of rotation 3 moves the shears 2 to the cutting position when the shears cut the pipe with cutting parts and press it with the stop 16 to the drum. After that, after a certain time delay, the movable knife 17 makes a pipe cut, while the cut end of the pipe (catch) is held in the tongs, and the cut end of the first turn is pressed against the drum by the stop 16, preventing the turns from spreading.

At the time of the end of the cut, the piston 18 of the hydraulic pneumatic amplifier presses the limit switch 9, the piston reverses, and

movable knife 17 returns to its original position.

After the end of the dragging, the beats are poured out of the pipe and the limit switch 8 is released, which gives the command to raise the shears to the starting position. At this point, the cycle of dragging one pipe riot ends.

Subject invention

A pipe-and-drum drum containing mites, scissors with pipe stop and pneumatic-hydraulic scissors control system with a limit switch, characterized in that, in order to automatically cut off the grippers at the required moment and release the cut end of the pipe, the working surface of the drum is made in the form of a spring-loaded swivel ruler interacting with the limit switch.

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