RU2001737C1 - Pneumatic impact device - Google Patents

Description

atmospheric control measures 10 at the time of opening the spool valve 5.

This design of the device has a higher speed compared to the device of Figs. 1, 2, since the control chamber 10 has a smaller volume. Such a device is easier to manufacture, in addition, its reliability is increased, since the valve-spool 5 over a considerable area constantly interacts with the inner walls of the hammer 7 along the entire length of the working stroke, which causes wear of the hammer and the valve-spool.

The input to the design of the device (FIGS. 5, 6) of the lever 22 and the pusher 23 allows for automatic operation due to the impact of the hammer 7 on the control valve 18, made in the form of a ball, through the lever 22, the axis of which is connected by a fixed support to the housing 1 , and pusher 23. Spring 24 presses valve 18 against the valve seat.

I adjust the length of the pusher 23, you can change the energy of the drummer and frequency.

To increase the operating efficiency, the head of the spool valve 5 can be made in the form of a disk with holes 25, in this case, the spring 16 provides only overcoming the dead weight of the valve and the friction force. As a result, in this case there is an increase in impact energy.

Pneumatic impact device operates as follows.

Through inlet 2, compressed air from the line enters the forward chamber 8. Through the holes 13 in the tube 4 and the holes 14 in the spool valve 5, air enters the control chamber 10 and through channel 6 and the calibrated hole 15 in the spool valve into the return chamber 9. The annular chamber 11 communicates with the atmosphere through channel 12. The valve 18, the operating cycle of the device closes the exhaust port 19. Under the action of compressed air in the control chamber 10, the valve 5 closes the exhaust port 3, compressing the spring 16.

Under the action of compressed air in the return chamber 9, due to the difference in the diameters of the lower and upper ends of the striker 7, it rises to its highest position, where it is fixed by a grip 17. blocking the hole 13, which eliminates the need to recharge the return chamber 9 with compressed air.

When valve 18 is opened, the pressure in the central tube 4 and control chamber 10 drops to atmospheric. The valve spool 5, under the pressure of the spring 16, opens the additional exhaust windows 3. The pressure in the reverse chamber 9 sharply nibbles Impactor 7 under the action of a compressed pos. in the forward-facing chamber 8, it strikes at the front end of the housing 1.

5After closing the valve 18 working

the cycle repeats.

The principle of operation of the pneumatic impact device (Fig. 3, 4) is as follows.

0 Through inlet 2, compressed air from the line enters the forward chamber 8. Through the openings 13 in the piston valve stem 5, compressed air enters the control chamber 10, biases the sleeve 5 downward, compressing the spring 16 and blocking the hole 21. The spool valve 5 closes the exhaust port 3. Through the holes 13 and 15 in the piston valve stem 5 compressed air enters the chamber

0 9 reverse. The annular chamber 11 communicates with the atmosphere through a channel 12.

Under the action of compressed air in the return chamber, due to the difference in the diameters of the lower and upper ends of the striker 7, it rises to its highest position, where it is fixed by a grip 17.

When the valve 18 is opened, the pressure in the control chamber 10 drops from atmospheric. The benefit 20 under the action of the spring 16 rises, entraining the stem of the valve valve 5, thereby opening additional exhaust windows 3. The pressure in the return chamber 9 drops sharply,

5 The impactor 7, under the action of compressed air in the forward stroke chamber 8, strikes the lower end of the housing.

After closing valve 8, the duty cycle is repeated.

The principle of operation of a pneumatic impact device (Figs. 5, 6) is as follows.

Through the inlet 2, compressed air from the line enters the chamber 8 of the 5th stroke. Through the hole 13 in the piston valve stem 5, compressed air fills the control chamber 10, shifts the sleeve 20 downward, compressing the spring 16 and blocking the hole 21. The valve-spool valve 5 overlaps the slotted holes made in the side walls of the housing 1. Through the holes 13 and 15 in the valve stem 5, air enters the return chamber 9. The annular chamber 11 communicates with

5 by the atmosphere through the channel 12. Under the action of compressed air in the return chamber, due to the difference in the diameters of the lower and upper ends of the striker 7, it rises to its highest position, changing the pusher 23 and the lever 22.

thereby opening the control valve 18. The control chamber 10 is sharply freed from compressed air. The sleeve 20 rises under the action of the spring 16, moving the valve stem 5. The disc of the latter opens additional exhaust openings 3. The pressure in the return chamber 9 drops sharply. The hammer 7, under the action of compressed air in the forward-running chamber 8, strikes the housing 1. The lever 22 of the pusher 23 then returns to its original position. The control valve 18 closes the pop-up hole 19. The duty cycle is repeated.

In the device, it is necessary to provide for the ratio of dpin pusher 23 and f

5

Chaga 22. to provide an opening force of valve 18 greater than the force from the pressure of compressed air on ball 18 from the side of control chamber 10.

The use of a device for breaking thin-walled pipes, knocking out structural elements allows replacing the manual labor used in these operations. Such a device successfully replaces a 10 kg sledgehammer. When using such devices, productivity is increased by about 2 times, quality is improved, labor costs for performing operations are reduced.

Claims (2)

1. PNEUMATIC SHOCK ACTION DEVICE, comprising a step-shaped housing with channels for supplying compressed air and its exhaust, a step drummer installed in the housing with a controlled valve located in the exhaust channel of the housing, characterized in that, in order to increase the impact energy by increasing efficiency h twenty 25 clap while reducing the dimensions, it is equipped with additional exhaust channels in the form of windows made in the housing, and a spool valve mounted in the housing with axial movement to block the additional channels. 2. The device according to claim 1. characterized in that the controlled valve is kinematically connected to the hammer. 0y.Ј 01 Ј Щ b / .7D.E. U /// H. IU - L -AND iliLOOS