SU1248791A1 - Percussive pneumatic machine - Google Patents

Description

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The invention relates to mechanical engineering, in particular, to pneumatic percussion machines used in mining, construction and other industries for the destruction of various materials,

The purpose of the invention is to increase the impact energy by increasing the stroke of the impactor under pressure.

The drawing shows a pneumatic percussion machine with a longitudinal section.

The pneumatic percussion machine contains a barrel 1 with a longitudinal channel 2 and connected with it by four radial holes 3-6 with a working cavity 7, two medium ones of which 4 and 5 are connected alternately with the atmosphere through exhaust holes 8 and 9, respectively. . The drummer 10 divides the working cavity 7 into the chambers of the working 11 and idle 12 strokes, communicated respectively with the extreme radial holes 3 and 6. The air-distributing device contains an exhaust stage spool 13 and an inlet air distribution unit designed to connect the network source 14 with the working chambers 11 and idle 12 strokes, and a working tool 15. In the barrel 1, an additional longitudinal channel 16 is made, the ends of which are connected to two openings 17 and 18 connecting the channel 16 to the working cavity 7, and A flexible air distribution unit is made in the form of a zavlotnik 19 placed in an additional longitudinal channel 16 with two annular grooves 20 and 21 intended to be connected to the network source 14 through openings 22 and 23, and double through L-shaped channels 24 and 25, the smaller part of which is communicated with the corresponding groove 20 or 21, and the larger part is located along the axis.

Pneumatic percussion machine works as follows.

At the initial moment, the hammer 10 and the spools 13 and 19 are in the position shown in the drawing. Compressed air from network source 14 through hole 23, groove 21. and channel 25 falls under the lower end of the spool 19 and throws it to the top

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 her position. In this case, compressed air through the opening 23, the additional longitudinal channel 16 and the opening 18 begins to flow into the idling chamber 12. Drummer 10 makes idling. At the same time, the compressed air through the opening 6 enters under the spool 13 and moves it to the upper position, closing the exhaust opening 9 and opening the exhaust exhaust 8. When the hammer 10, idle, with its upper edge will block the exhaust opening 8, in the chamber 11 working stroke. Begins to compress the air, forming an air cushion. When the lower edge of the striker 10 opens the exhaust hole B, in the chamber 12 of idling occurs. When this pressure under the spools 13 and 19 will fall, and the pressure created by the air cushion in the chamber 11 of the working stroke through the holes 3 and 17, affecting the upper ends of the spools 13 and 19, throw them in the lower position. At the same time, the upper end of the spool 19 through the opening 22, the groove 20 and the channel 24 is still affected by the pressure of the network source 14. The compressed air from the network source 14 through the holes 22, 17 and the additional longitudinal channel 16 enters the working stroke chamber 11 . Drummer 10 begins to make a working move. When the drummer 10 overlaps the exhaust window 9 with its lower edge, in the chamber 12 there will be a ho-. stroke begins to form with an airbag. When the exhaust window 9 is opened by the upper edge of the hammer 10 in the working stroke chamber 11, the exhaust occurs and the pressure acting on the upper ends of the spools 13 and 19 drops; at the same time, the pressure on the lower ends of the spools -13 and 19 increases due to the pressure created by the airbag. The spools 13 and 19 move in the corresponding channels 2 and 16 up and take the initial position. At the end of the working stroke, the striker 10 strikes the shank of the working tool 15. Then the cycle repeats.

The invention allows to increase the impact energy by increasing the path of the impactor under pressure.

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and reduce the resistance to movement of the compressed air of the idle cells and by more completely emptying the working codes;

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Claims (1)

PNEUMATIC SHOCK ACTION MACHINE, containing a barrel with a main longitudinal channel and a working cavity communicated with it through four radial openings, two middle of which are connected alternately with the atmosphere, a hammer that divides the working cavity into working and idle chambers, respectively communicated with extreme radial openings, an air distribution device including a graduated exhaust valve and an intake air distribution unit for connecting a network source with cameras for working and idling, and a working tool, characterized in that, in order to increase the impact energy by increasing the stroke of the hammer under pressure, an additional longitudinal channel is made in the Barrel, the ends of which are connected to two holes communicating the main channel with the working cavity, and the inlet air distribution unit is made in the form of a spool located in an additional longitudinal channel with two annular grooves designed to connect to a network source, and two through L-shaped channels nalami, a smaller part of which is connected with the corresponding groove, and most are located along the axis. SU „1248791