SU531907A2 - Device for punching wells in the ground - Google Patents

Description

one

The invention relates to devices for punching wells and laying communications in the ground during construction and mining operations.

According to the main author. St. No. 328240, a device for punching wells in the ground is known, including a housing with a hammer placed therein, an air inlet nozzle, a sleeve and a nut.

The purpose of the invention is to improve the reliability of reversing the course of the device. This is achieved by the fact that the air inlet pipe of the device is provided with an end bridge and windows in the side wall of its tail section, on which a sleeve is fixed to the floor with an elastic valve and openings in the end wall that constantly connect the outlet channel of the pipe to the atmosphere.

The drawing shows the proposed device in the position corresponding to its forward course.

The device consists of a body 1, a hammer 2, an air inlet 3, a movable sleeve 4 and a nut 5.

The body is a pipe pointed at the front, the inner surface of which serves to direct the movement of the impactor. An air inlet with windows 6 for intake and 7, 8 for exhaust of compressed air is made with a partition 9, which divides its internal cavity into the inlet channel 10 and exhaust channel I, and is threaded with a nut. The exhaust channel is sealed with end partitions 12 and 13. One end of the branch pipe enters the tail end of the firing pin, and a flexible hose 17 is attached to its other end by means of a fixed hollow bushing 14 with openings 15 that are blocked by an elastic valve 16. interacting with the drummer and having the possibility of axial movement. The nut is the back wall.

shells and takes blows during the reverse course of the device.

The forward move is as follows.

The drummer and the base on the sleeve are in

the rearmost position (in the drawing in the top), the inlet ports of the socket are open, the Camera 18 through the windows 19 of the impactor, the exhaust ports, the exhaust port of the socket and the openings of the fixed hollow bushing is connected to the atmosphere. Under the action of compressed air entering through the inlet duct of the nozzle into the cavity 20 and chamber 21, the hammer moves forward. At a given distance from the beginning of the stroke of the striker, its protrusion

22 comes into contact with the front (in the drawing

the lower protrusion of the movable sleeve and, moving it through the nozzle, closes the windows 6, stopping the inlet of compressed air into the chamber 21. The forward movement of the striker is carried out under the action of the energy of the air expanding in the chamber 21. At the end of the stroke, the hammer strikes the head of the hull and the device is inserted into the ground.

At a given distance from the end of the stroke of the striker, the windows open with its end edge and as a result, air is exhausted from chamber 21 through channel 11, window 8 and holes 15 into the atmosphere. The windows 19 are opened by the front end edge of the nozzle, and compressed air from the cavity 20 enters the chamber 18.

After striking a blow, the impactor begins to move backward under the action of compressed air in chamber 18. The movable sleeve remains in the extreme forward position, i.e. the windows 6 are closed. The windows 19 overlap with the side surface of the nozzle 3 and the compressed air inlet to the chamber 18 is stopped. The drummer continues to move due to the energy of expanding compressed air. At predetermined distances from the beginning of the return stroke of the striker, its window 19 is aligned with the windows / nozzle and from the chamber 18 through the channel 11, the window 8 and the holes 15, air is exhausted into the atmosphere, and the protrusion 22 comes into contact with the rear one (in the upper drawing) the protrusion of the sleeve 4, pushing it upon further movement to its original position, i.e., opening windows 6 through which compressed air is introduced into the chamber 21. As a result

this drummer brakes. Then the cycle repeats.

To switch the device to reverse, it is necessary to move the nozzle from the front position to the rearmost position, for example, by rotating the hose until the nozzle is screwed into the nut until it stops.

With the new position of the nozzle, the volume of the chamber 18 increases. When the striker moves forward, the windows 19 are opened earlier and, therefore, the compressed air is introduced into the chamber 18 also earlier. The braking performance of the hammer during forward travel increases, as a result of which the hammer slows down before striking, and then starts to move in the opposite direction. At the same time, windows 6 and 7 open later, i.e. the exhaust of air from chamber 18 and the inlet of compressed air into

camera 21 is implemented later. Therefore, not having time to brake, the drummer strikes the nut, and thus the device will reverse. Then the cycle repeats.

Claims (1)

Invention Formula A device for punching wells in the soil by the author. St. No. 328240, characterized in that, in order to increase reliability reversing the stroke, the air inlet nozzle is provided with an end bridge and windows in the side wall of its tail section, on which a sleeve is fixed to the floor with an elastic valve and openings in the end wall that constantly connect the outlet port of the socket with the atmosphere.