SU1333748A1 - Percussive device for making holes in earth - Google Patents

Description

one

The invention relates to construction equipment and can be used to form wells in the ground, hammering pipes, tongues, piles and other rod-like elements into the ground, as well as for soil compaction or for the destruction of rocks.

The purpose of the invention is to blow 18 and 19 into the main chamber 8 of combustion power, efficiency, reliability and simplify the design of the device by using a compressed gaseous combustible mixture.

Fig. 1 shows a percussion device for drilling wells in the ground, a section; in fig. 2 shows section A-A in FIG. one.

The device consists of a housing 1 in which a three-stage drummer 2 and a cylinder 3 are located. A sleeve 4 is attached to the case and fixed with a retaining ring 5.

The housing 1 with a smaller step of the hammer 2 forms an additional combustion chamber 6 of the return stroke, and with a smaller and larger degree the annular chamber 7 of the reverse stroke. In the rear part of the device between the surfaces of the striker 2 and the cylinder 3 there is a main combustion chamber 8 of the forward stroke, and between the surfaces of the housing i, the drummer 2 and the cylinder 3 there is an annular chamber 9 of the forward stroke. At the lower stages of the striker 2, annular grooves 10 and 11 are made, with which the annular chamber 7 is retracted through channels 12 and 13 in the housing 1, and the annular chamber 9 is forward through the channel 14 and the throttle hole 15 in the cylinder 3 are connected to a channel for supplying a combustible mixture 16; In case 1, an opening 17 is made through which the annular chambers 7 and 9 can communicate via the longitudinal channel 18 and the blowing channels 19 and 20 with the main B and an additional 6 Combustion chambers; Combustion Chambers 6 and 8 with atmosphere h Through channels 21 and 22 in housing 1 and channels 23 and 24 in cylinder 3.

The channels 13, 18 and 22 are formed by the surfaces of the longitudinal grooves formed on the outer surface of the housing 1 and the inner surface of the sleeve 4.

The device works as follows.

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neither the forward stroke and, at the same time, the filling of the annular chamber 7 of the reverse stroke with a compressed combustible mixture. Under the action of pressure in the annular chamber 7, the striker moves backwards and compresses the combustible mixture in the combustion chamber 8. When compressed, the temperature of the combustible mixture permeates and the mixture self-ignites. During the combustion of the pulping mixture, the pressure in chamber 8 is multiplied multiple times. At the same time, exhaust of the combustible mixture into the additional chamber 6 is accumulated and the filling of the 25 annular chamber 9 of the forward stroke with a compressing combustible mixture takes place.

Under the effect of pressure of burnt gases in chamber 8 and pressure of compressed combustible mixture in the annular chamber 9, the impactor accelerates and strikes the body - the device is introduced into the ground. In the opposite position of the impactor, the ignition combustible mixture in the combustion chamber 6 of the reverse stroke, filling the annular chamber 7 of the return stroke with a compressed combustible mixture; exhaust of exhaust gases from the combustion chamber 8 through channels 23 and 24 into the atmosphere; 40, the output of the spent combustible mixture from the annular chamber 9 through channels 18 and 19 into the combustion chamber 8 . The high rate of release of the combustible mixture from the purge port 19 ensures high quality of the purge and filling of the combustion chamber 8 with a combustible mixture.

To the rear position, the impactor 2 is transferred under the action of the pressure of the combustible gases in chamber 6 and the pressure of the combustible mixture in the annular chamber 7. Exhaust gases from the combustion chamber 6 to the atmosphere go through channels 21 to 24, and filling and purging the chamber 6 is hot. a mixture of channels 17, 18 and 20,

For the operation of the proposed device, a small consumption of compressed decay is sufficient - a combustible mixture, which

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The combustible mixture under pressure through the channel 16 is pushed to the channels 12 and 14 and through the throttle opening 15 fills the annular chamber 9 of the forward stroke. Drummer 2 moves to its frontmost position. When this occurs, the output of the spent combustible mixture through the hole 17 and the channels

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neither the forward stroke and simultaneously the filling of the annular chamber 7 of the reverse stroke with a compressed combustible mixture. Under the action of pressure in the annular chamber 7, the striker moves backwards and compresses the combustible mixture in the combustion chamber 8. When compressed, the temperature of the combustible mixture permeates and the mixture self-ignites. During the combustion of the combustible mixture, the pressure in chamber 8 is multiplied. At the same time, exhaust of the combustible mixture into the secondary chamber 6 of the reverse combustion process and filling of the 5th annular chamber 9 of the forward stroke with the compressed combustible mixture occurs.

Under the action of pressure of burnt gases in chamber 8 and pressure of compressed combustible mixture in the annular chamber 9, the striker accelerates and strikes the body - the device is introduced into the ground. In the forward position of the striker, the ignition of the combustible mixture in the combustion chamber 6 an annular reversing chamber 7 with compressed combustible mixture; exhaust exhaust from the combustion chamber 8 through channels 23 and 24 into the atmosphere; the output of the spent fuel mixture from the annular chamber 9 through channels 18 and 19 into the combustion chamber 8 . The high rate of release of the combustible mixture from the purge port 19 ensures high quality of the purge and filling of the combustion chamber 8 with the combustible mixture.

To the rear position, the impactor 2 moves under the action of the pressure of the combustible gases in chamber 6 and the pressure of the combustible mixture in the annular chamber 7. The exhaust of exhaust gases from the combustion chamber 6 to the atmosphere occurs through channels 21-24, and filling and purging the chamber 6 with hot mixture on channels 17, 18 and 20,

For the operation of the proposed device, a small consumption of compressed decay is enough - a combustible mixture, which

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can be prepared by spraying liquid fuel in compressed air or by mixing combustible gas with compressed BOS spirit. As a source of compressed air, you can use an air compressor of relatively small capacity.

In the proposed device, the front and rear annular chambers, when fed into them through the annular grooves on the impactor of the compressed medium, fulfill the role of the working chambers of the forward and reverse stroke of the pneumatic impact mechanism, from which the exhaust takes place into the surrounding environment.

The pressure, and hence the speed of the output of the spent compressed

the environment is significant and if a combustion chamber is placed on the way of its exit, the previously useless exhaust will do useful and important work - it blows and cleans the combustion chamber. This significantly increases the efficiency and power of the device.

Due to the simultaneous operation of all four cameras, the device works reliably, while receiving the maximum impact power. When passing a flash in one of the combustion chambers, one of the annular chambers will always come to the aid of the device and the device will not stop working.

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Claims (1)

IMPACT DEVICE FOR DRILLING WELLS IN SOIL containing a housing with channels, in which a step striker, primary and secondary combustion chambers, front and rear chambers, channels for supplying a combustible mixture and channels for exhaust gases, characterized in that, in order to increase the impact power and operational reliability of the device, the annular chambers are communicated by means of grooves, which are made at lower stages of the hammer, with a channel for supplying hot mixture, and by means of purging channels, which are made in t le corps, with basic and additional combustion chambers.