SU1168399A1 - Percussion=action air-reactive machine - Google Patents

Abstract

AIR-REACTIVE MACHINE OF SHOCK ACTION, comprising a housing, a pneumatic accumulator with a plunger in a hydraulic cavity, a firing pin and a working tool, characterized in that, in order to increase productivity, it is equipped with a multiplier placed in the accumulator and a jet nozzle mounted in the multiplier housing, and the multiplier housing is made with an axial bore and radial channels communicating with the battery cavity, the plunger is made stepped and has radial windows, assigned to exhaust air.

Description

The invention relates to impact devices and can be used in construction, mechanical engineering and other sectors of the national economy for the destruction of concrete, masonry, frozen soil, etc.

A percussion device is known, comprising a housing, a cylinder, a firing pin, working and idling chambers, which are mixed in it, a working tool and an air-distributing device for supplying compressed air 1.

However, this device is characterized by large losses in the conversion of compressed air into kinetic air, which leads to a low device performance.

Closest to the invention is a percussion machine, comprising a housing, a pneumatic accumulator with a plunger in a hydraulic cavity, a head and a working tool 2.

However, a known percussion machine has a low productivity associated with the energy loss during its conversion.

The purpose of the invention is to increase productivity.

This goal is achieved by the fact that an air-reactive percussion machine, comprising a housing, a pneumatic accumulator with a plunger in the hydraulic cavity, a firing pin and a working tool, is provided with a multiplier placed in the accumulator and a jet nozzle mounted in the multiplier housing, and the multiplier body is made with an axial bore and radial channels communicating with the battery cavity, the plunger is made stepped and has radial windows designed to expire ear.

FIG. 1 shows an air-jet impact machine, general view; in fig. 2 shows section A-A in FIG. one.

The percussion air blower includes a housing 1 in which a piston compressor 2 with a pneumatic accumulator 3 is located, connected by a discharge valve 4, and a piston 6 in the hydraulic cavity 7 of the accumulator 3 is located in the piston 5 of the compressor 2 8. The housing 1 also contains a hammer 9, a distance spring 10, which returns the hammer 9 9 to its original position, and an annular spring 11, designed to fix the hammer 9. On one of the ends of the housing 1 is attached a working tool ent 12.

Pneumatic battery 3 contains a multiplier 13, the body 14 of which has an axial bore 15 and through radial channels 16 communicating with the cavity 7

battery 3. In the housing 14 of the multiplier 13 there is a jet nozzle 17. The plunger 8 is made stepped with a large 18 and small 19 diameters. The large-diameter cylinder 18 of the plunger 8 contains radial windows 20 intersecting in one plane and overlaps the radial channels 16 of the housing 14 of the multiplier 13. The cylinder 19 of the small diameter plunger 8 enters the cavity 7 of the battery 3.

Air Jet Impact Machine

5 acts as follows.

When the drive (not shown) is turned on, the piston 5 of the compressor 2 reciprocates. When air is compressed in compressor 2, compressed air is injected into cavity 7

0 of the accumulator 3 through the discharge valve 4, during the reverse movement of the piston 5, the air pressure in the compressor 2 by means of the suction valve 6 becomes equal to atmospheric.

5When reaching the limiting pressure

compressed air in the cavity 7 of the battery 3, the limiting forces of pressure are applied to the end 19 of the small diameter of the plunger 8 entering the cavity 7. The spring-loaded plunger 8, moving, takes

0 a position in which the radial ports 20 of the plunger 8 are aligned with the radial channels 16 of the housing 14 of the multiplier 13, and through the jet nozzle 17 there is an outflow of compressed air having high pressure and velocity. In this case, the potential energy of the compressed air is converted into kinetic energy and the developed reactive force of the directed action acts on the firing pin 9, which, in turn, collides with the working tool

Q 12 transmits shock energy to it to destroy the treated medium, then returns to its original position due to the energy of the distance spring 10 stored during compression and is fixed by means of a ring spring 14. The pressure of the compressed

5, the air in the cavity 7 of the battery 3 is sharply reduced, and the spring-loaded plunger 8 returns to its original position, the channels 16 of the housing 14 of the multiplier 13 are closed, a repeated cycle of charging the battery 7 with compressed air 7 occurs, and the cycle is repeated.

The proposed percussion air jet machine has high productivity and simplicity of design.

13

/ b

u

FIG.

Claims (1)

AIR-REACTIVE SHOCK ACTION MACHINE, comprising a housing, a pneumatic accumulator placed therein with a plunger in the hydraulic cavity, a hammer and a working tool, characterized in that, in order to increase productivity, it is equipped with a multiplier placed in the accumulator and a jet nozzle installed in the case of the multiplier, and the case of the multiplier is made with an axial hole and radial channels communicating with the cavity of the battery, the plunger is stepwise and has radial windows, designed to ennye for expiration of air.