SU147088A1 - Pneumatic mortar for grinding samples of solid materials - Google Patents

Description

It is known to use movable cylinders with fixed pistons in percussion pneumatic machines.

The dryness of the described invention is the use in a pneumatic mortar of a movable working cylinder with a fixed piston, its pestle and interacting with the spring-loaded spool rod.

The drawing shows a pneumatic mortar for grinding samples of solid materials.

The pneumatic mortar consists of a movable working cylinder / equipped in the lower part with a pestle 2, a fixed piston 3 mounted on the upper traverse 4 fixed in turn on the uprights 5, a crosshead 6 also fixed on the uprights 5, the spool valve and the switching mechanism.

Traverse 6 serves as a guide for the working cylinder.

When the switching handle 7 is located in the extreme left position, the cam 8 of the switching clutch 9 through the washer fixed on the rod 10 will mix the spool 12 of the slide valve box 13 into the lower position.

In this position, the spring 14 is compressed. The cam 15 of the shift clutch 9 engages the yoke 6 and locks the working cylinder / with pestle 2 in the extreme upper position. In the lower position of the spool 12, compressed air from the pipeline to pipeline 16 enters the spool box 13 and through channel 17 through the middle cavity 18 of the spool and pipeline 19 under the spool 20 (cavity 21). In this case, the spool 20 moves to the uppermost position, as a result of which the air from the main pipelines 16, 22 enters the upper part of the working cylinder. The air displaced from the space above the spool No. 147088-2 is 20 from cavity 23 through channel 24, through upper cavity 25 of spool 12 and channel 26 enters the atmosphere. The air displaced by the piston 3 through the pipe 27, the lower cavity 28 of the valve 20 and the channel 26, is released into the atmosphere.

When the handle is moved to the extreme right position, the spring 14 is released and moves the spool 12 to the upper position.

Air from the pipeline through the pipeline in this case goes through channel 17 through the middle cavity 18 of spool 20, through channel 24 and switches the spool 20 to the lower position. This ensures that air flows from the line through the middle cavity 18 of the spool 20 and pipe 27 into the lower part of the working cylinder - /, ensuring the movement of the cylinder with the pestle down - to the blow.

Air displaced from the upper part of the cylinder / through conduit 22 through the upper cavity 25 of spool 20 and channel 26 into the atmosphere. From the spool 20, air through conduit 19 through the lower cavity 28 of spool 12 enters the atmosphere.

The vacuum resulting from the movement of the spools 12 and 20 is compensated for by the connection of the channels with the channel 26 connected to the atmosphere. When the working cylinder moves downward, the shoulder 29 presses against the spring 30, through which the rod compresses the spring 14 and moves the spool 12 to the lower position, after which the cycle repeats.

The pneumatic mortar according to the described invention is intended for laboratory work: grinding samples of solid materials for subsequent analysis, in particular in steel production. The tests of the prototype in the laboratory of the open-hearth shop showed the expediency of using the proposed pneumatic mortar.

Subject invention

The use of a pest-carrying, movable working cylinder with a fixed piston, interacting with a spring-loaded spool rod, in a pneumatic mortar for grinding samples of solid materials, for example, scale, scrap, ferroalloys.

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