SU1509524A1 - Pneumatic hammer - Google Patents

Abstract

The invention relates to mining and construction equipment and is intended for the destruction of rocks and oversize. The goal is to reduce the consumption of compressed air and reduce cyclic loads during idle blows by increasing the reliability of closing the air valve. The pneumatic hammer contains the air supply pipe 1, the working tool (RI) 2 and the housing 3. In the latter, the barrel 4 is mounted with a drummer 5 located inside it, a spool valve 6 of compressed air and an automatic trigger 7. It contains a piston 11 rigidly connected with the barrel 4 and a pusher 8 through the distributor 6. In the guides 9 of the pusher 8 there is an air valve (BK) 10, and in the piston 11 there is a cup 12 with the possibility of interaction with the BK 10. At the ends of the piston 11 and Cup 12 is installed thrust disk 13, spring-loaded by means of elastic elements (CI) 14, the total force of which is no less than 1.5 times the mass of the moving parts of the pneumatic hammer. In the process of interaction with the rock and when a force occurs on the RI 2, which exceeds the total resistance of the UE 14 kit and the air pressure on the barrel 4 through the piston 11, the working tool moves to the right of the RI 2 and through the end face 31 shifts the barrel 4 and the piston 11. The spool 28 of the distributor moves 6 and the pusher 8 opens the VC 10. The drummer 5 moves to the RI 2 and due to the expansion of air in the working chamber 17 formed by it in the cavity of the barrel 4, hits the shank of the RI 2. When the force on the RI 2 decreases, the barrel 4, the spool 28 and the piston 11 with disk 13 under the influence of E 14 and the pressures of compressed air in the cavity formed by the piston 11 and the glass 12 return to their original position. Air access is blocked by VK 10. 1 sludge.

Description

1509524

RIU 2. With a decrease in the force on the RI by the piston 11 and the glass 12, the strip 2 of the barrel 4, the spool 28 and the piston 11 are returned to their original position by the disk 13 under the action of the UE 14 and the thrust. The access of air is blocked by the pressure of compressed air in the formation of VK 10. 1 sludge.

This invention relates to mountainous

and construction equipment and maybe "

used in pneumatic hammers for the destruction of rocks and oversize.

The purpose of the invention is to reduce the consumption of compressed air and reduce cyclic loads during idle blows due to increased reliability of closing the air valve.

The drawing shows a pneumatic hammer. The pneumatic hammer includes air supply nozzle 1, working tool 2, body 3, barrel 4 mounted in it with drummer 5 located inside it, spool distributor 6 of compressed air and automatic start 7. The latter contains a pusher which is rigidly connected to the barrel through the .gold distributor.

located in its guides

9 an air valve 10, a piston 11 rigidly connected to the barrel and a cup 12 installed therein with the ability to interact with the air valve. At the ends of the piston 1.1 and glass 12 there is a stop disk 13, spring-loaded elastic elements 14, the force of which is no less than than 1.5 times the mass of the moving parts of the pneumatic hammer. The work tool is kept from turning and falling out with the help of keys 15, providing 1x the necessary longitudinal course. The drummer 5 forms an idling chamber 16 and a working chamber 17 in the barrel cavity 4. Axial channel 18, exhaust ports 19 and 20 and command channel 21 are filled in the barrel. The spool valve includes a spool box 22 with channels 23-27 and a spool 28. A radial bore 29 is in the cup, and a bore 30 is in the piston. The barrel has an abutting end 31. A piston 32 is installed in the piston 11 and located in the groove 33 The elastic elements are mounted on guide rods 34.

Pneumatic hammer works as follows.

0

0

5 0 5 about 5

Compressed air through the air inlet pipe 1 enters the machine

7 passes of the pneumatic hammer and through the opening 29 in the glass 12 enters the cavity formed by these glass and piston 11. The pressure of the compressed air piston and the barrel 4 of the pneumatic hammer rigidly connected to it move to the left against the end of the end 31 with the housing 3. This movement is also promoted by the force of the elastic elements 14 acting on these parts through the thrust disk 13.

At this position, the air valve 10- blocks the flow of air and the pneumatic hammer is turned off.

In the process of interaction with the rock and the occurrence of force on the working tool 2, which exceeds the total resistance of the set of elastic elements 14 and the air pressure on the barrel through the piston, the working tool moves to the right and through the end 31 moves the barrel 4 and the piston 11. Simultaneously with the barrel the spool box 22 moves , the spool 28 and the pusher 8, which opens the air valve 10. The compressed air enters the working chamber 17 through the openings 2.7 of the spool box 22 and causes the hammer 5 to move in the direction of Static preparation tool 2. Air from the chamber 16 is displaced through the axial passage 18 and the channels 24 and 25 slide valve box 22 to the atmosphere. As soon as the drummer opens the command channel 21, the compressed air through this channel and the holes 23 in the spool box flips the valve 28 to the right. There is a cutoff of the flow of compressed air into the chamber 17, and the drummer, continuing its movement due to the expansion of the air in this chamber, strikes on the shank of the working tool. At the same time, the hammer opens the exhaust port 20 and the chamber 17 is cleaned of compressed air.

Subsequently, the air through the channels 25 and 26 of the spool box and the axial channel 18 enters the chamber 16 and moves the hammer to the right until the air pressure on the right end of the valve 28 reaches the required value. After that, the slide valve moves to the left, and the drummer opens the hole 19, and the chamber 16 is cleaned of compressed air. The cycle is repeated.

By reducing the force on the working tool 2, the barrel 4, the spool box 22 with the spool 28 and the piston 11 with the disk 13 under the influence of the force of the set of elastic elements 14 and the pressure of compressed air in the cavity formed by the piston and the cup returned. back to the starting position. The valve 10 blocks the access of air, and the pneumatic hammer stops operation.

Claims (1)

Invention Formula Pneumatic hammer, including air supply pipe, working tools 50 five The body, the barrel mounted in it with the drummer located inside it, the ashes of the compressed air distributor and the start-up automatic machine containing a pusher rigidly connected to the barrel through the spool distributor, an air valve in its guides, a piston rigidly connected to the barrel and mounted in with the ability to interact with the air valve glass, about tl and h and y - y and with the fact that, in order to reduce the flow of compressed air and reduce cyclic loads during idle blows due to ysheni reliability of closing of the air valve is provided with a pneumatic hammer ,, mounted at the ends of the piston and the thrust nozzle disc spring-loaded by means of elastic elements, the total force which, according to a value of not less than 1.5 times the mass of the moving parts pneumatic hammer.