SU527501A1 - Pneumatic percussion device - Google Patents

Description

(54) PNEUMATIC DEVICE OF SHOCK

one

The invention relates to percussion devices and can be used to form wells in soils in the construction of various types of underground utilities.

A pneumatic percussion device is known, comprising a housing in which a drummer with channels and a protrusion is installed, a nut and a sleeve having a groove and cooperating with the protrusion protrusion.

The aim of the invention is to increase the shock power.

To achieve this goal, the sleeve is mounted between the nut and the firing pin and is made with a window and an internal groove in which the flank of the firing pin is located.

The nut may have inlet and outlet katsaps that extend to its inner surface.

The drawing shows the proposed device in section.

The device consists of a housing 1 with internal bores 2 and 3. Inside the housing 1 is placed a stepped drummer 4

with a radial channel 5, an additional exhaust channel 6 and a central channel 7. At a lower stage 8 of the impactor 4, a sleeve 9 is mounted with an inlet window 10 and an internal 11 n outer 12 grooves. Drummer -5 is equipped with a protrusion 13, which is raameigene in the inner groove 11 of the sleeve 9. EZ nut 14 is made exhaust 15 and inlet 16 and 17 channels,

The drummer 4 and the housing 1 form the chamber of working stroke 18 and the chamber of the rotating stroke 19. Compressed air is fed into the device through the hose 20.

The device works as follows.

In the initial position, the rim 4 is in the extreme rear position (right drawing). The inlet window Yu is connected to the inlet channel 16, the radial channels 5 of the striker 4 are blocked by the inner surface of the housing 1, and the exhaust channel 15 is blocked by the surface of the sleeve 9. Compressed air enters the central channel 7 and into the working stroke chamber 18. Udarnik 4, sun surface which is under compressed air pressure,

Arijetsr forward {on the drawing-left). On aanairHo.v; From the end of the working stroke of the striker, the protrusion 13 of the striker 4 interacts with the collar of the internal groove 11 of the sleeve 9. The sleeve 9 starts forward movement together with the hammer 4

When moving, the inlet ports 10 of the bushings 9 overlap the inner cylindrical surface of the nut 14, and the inlet ports 16 of the nut 14 overlap the cylindrical surface of the bush 9, the compartment of the working stroke chamber 18 from the network. In the rest of the working stroke, the impactor 4 moves due to the expansion of air in the chamber of the working hots 18 and the pressure of the air entering the central channel 7 from the network

At the end of the stroke of the striker 4, the external bore 12 of the sleeve 9 is connected to the exhaust channel 15 and protrudes beyond the end of the nut 14. The exhaust of compressed air from the working stroke chamber 18 to the atmosphere and the radio channels 5, protrusion beyond the edge of the internal bore 2 of the torspus 1, connect chamber reverse cho-. yes 19 with a network.

Drummer 4 strikes housing 1, as a result of which the device is inserted into the ground.

The return stroke of the striker 4 starts under the action of the network air pressure in the return stroke chamber 19. The working stroke chamber 18 is disconnected from the network. The channels 6 are blocked by the inner surface of the housing 1. Upon further movement of the striker 4, the radial channels 5 overlap the inner surface of the housing l and the return gear 19 is disconnected from the network, and the return stroke of the striker 4 continues due to the expansion of air in the return travel 19.

At a predetermined distance from the beginning of the return stroke of the striker, the channels 6 exit the edge of the bore 3 of the housing 1, and the air through the outer groove 12 of the sleeve 9 and the channel 15 of the nut 14 exits to the atmosphere.

The drummer 4 interacts with the sleeve 9 as it moves. With the further movement of the hammer 4, the external groove 12 of the nut overlaps the inner cylindrical surface of the nut 14. At the end of the return stroke of the striker 4, the window 10 of the sleeve 9 communicates via channel 16 the camera of working stroke 18 with the network, and the compressed air begins to fill the chamber of stroke 18. The cycle repeats.

Claims (2)

1. A pneumatic percussion device mainly for the formation of wells in the ground, including a housing in which a drummer with channels and a protrusion, a nut and sleeve, having a groove and interacting with a protrusion protrusion, is installed, which for the purpose of increasing the shock of the impact, the sleeve is mounted: -1 between the nut and the hammer and is made with a window and an internal groove in which the bulge of the hammer is located. 2. The device according to claim 1, characterized in that the nut has an inlet and exhaust channels leading to its inner surface.