SU994619A1 - Pneumatic percussive device for driving rods into soil - Google Patents

Description

one

The invention relates to construction equipment and can be used to drive flexible rods into bundles and then to pull them out, during the formation of holes or wells.

A device for blocking various elements into the ground is known, comprising a housing, a hammer, an air distribution mechanism and a clamping device mounted on housing 1,

In the known device, the impact on the rod is carried out by applying shock loads on its end.

With such an impact, the rod bends, especially when driving it into dense soils, therefore, the known device is inefficient.

- The closest in technical essence and the achieved result to the invention is a pneumatic impact device for driving rods into the ground, including a housing with an axial channel in which a tube is installed, a hammer located between the housing and the tube, a nut and a clamping device 2.

When such a device is used, it takes a lot of time to rearrange it to extract the rods, which ultimately leads to a decrease in the productivity of the formation of shrsh or wells by plugging the rods into the ground and their subsequent removal.

The purpose of the invention is to improve the performance of the device by allowing the rods to be removed without rearrangement.

ten

The goal is achieved by the fact that a pneumatic impact device for driving rods into the ground, including a housing with an axial channel in which a tube is installed, a drummer placed 15 meters by the housing and tube, a nut and a fixture, is provided with a spring-loaded air-distribution sleeve with a lock, between the body and the drummer.

FIG. 1 shows pneumatic impact

20 mechanism, in the mode of core driving; in fig. 2 is the same in the rod extraction mode.

Pneumatic shock device consists of a housing 1, in the cavity of which is installed

step drummer 2 with an axial 3 n radial channels 4. In the axial channel 3 a tube 5 is installed in which the immersed rod element 6 is placed. The internal cavity of the housing is closed by a nut 7. The tube 5 is fixedly fixed in the housing 1 and the nut 7. On the inner surface of the axial channel 3 of the striker 2, there is a bore 8 which terminates behind the radial channel 4 and forms with the tube 5 an annular channel 9 serving as a batch. messages of the reverse camera 10 with the forward camera 11 and with the exhaust chamber 12. In the rear part of the housing 1, there is an air distribution sleeve 13 with grooves 14 for compressed air inlet. The sleeve 13 is fixed in the housing 1 with a retainer 15 installed in the nut 7 and a return spring 16. The retainer 15 is tucked to the nut 7 by the spring 17. The nut 7 has exhaust channels 18 and inlet ports 19 communicated with the air inlet hose 20. At the bottom The housing 1 is installed clamping device 21.

Pneumatic shock device works as follows.

The rod 6 is passed through the tube 5, after which the device is fixed to the rod using a clamping device 21. Compressed air entering through the hose 20 through the hole 19 and the grooves 14 enters the forward stroke chamber 11, acting on a portion of the end area of the striker 2 from this camera.

In the position shown in FIG. 1, the compressed air from the chamber 11 through the channels 4 and 9 enters the return stroke chamber 10. Since the area of the impactor 2 on the side of the chamber 10 is larger than its area on the side of the chamber 11, the impactor moves upwards. After the channel 4 is blocked by the inner surface of the sleeve 13, the impactor moves due to the energy of the air expanding in the chamber 10. After the passage of the upper edge of the sleeve 13 by the channel 4, air is exhausted from the chamber 10 through the channels 9 and 4, the exhaust chamber 12, the exhaust slots 18 to the atmosphere. After stopping the striker 2 with the pressure of compressed air in chamber 11, it begins to move downward before striking the front part of housing 1. Before impact, channel 4 opens and compressed air enters chamber 10. Subsequently, the cycle repeats.

Under the action of alternating shocks, the rod 6 connected to the housing 1 by means of the clamping device 21 is immersed in the ground. To remove the rod 6 from the soil, it is necessary to turn it on.

pull out the retainer 15, the locking air distribution sleeve 13 in the nut 7. The sleeve 13 moves up to the stop in the nut 7, compressing the spring 16, because pressure is acting on it from below

compressed air, and from above, from the side of the exhaust chamber 12, the pressure is close to atmospheric. In the upper position, the sleeve. 13 is locked by a latch 15, which fits into the groove 14. With the upper position of the sleeve, the inlet of compressed air into the reversing chamber 10 occurs earlier than the described mode, and therefore the impactor 2 does not touch the housing 1, since The energy of the downwardly moving drummer 2 is extinguished by the compressed air entering the chamber 10, and the drummer 2 stops by not producing during the direct stroke of the impact. Continuing to flow into the chamber 10, the compressed air acts on the impactor 2, and it moves back (up). After the passage of the upper edge of the sleeve 13 by the channel 4, air is exhausted from the chamber 10, and the hammer 2 strikes the anvil of the tube 5, which is transmitted through the housing 1 and the fixture 21 to the rod 6. Then

the cycle repeats. Under the action of alternating strikes striker. 2 along the anvil of tube 5, the rod is removed from the soil. The proposed pneumatic impact mechanism allows an increase in labor productivity during work related to the immersion of the rod and its subsequent removal from the soil due to the possibility of removing the rods without moving the device.

Claims (2)

1. A pneumatic impact device for driving rods into the ground, including a housing with an axial channel in which a tube is installed, a drummer placed between the housing and the tube, a nut and a clamping device, characterized in that in order to increase its performance by allowing the rods to be removed without interchanging the device 5 toHO is equipped with a spring-loaded air distribution sleeve with a retainer installed between the body and the hammer. Sources of information taken into account in the examination of 0 1. USSR Author's Certificate No. 607902, cl. E 02 F 5/18, 1976. 2. USSR author's certificate No. 607885, cl. E 02 D 7/02, 1976 (prototype).