SU1416621A1 - Device for driving a pipe into soil - Google Patents

Description

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The invention relates to construction equipment and can be used for trenchless laying of underground utilities,

The aim of the invention is to increase the operational reliability of the device.

On fi1. 1 shows a device, a partial longitudinal section, before connecting it to a pipe to be driven; in fig. 2 - the same attached to the pipe being driven; in fig. 3 is a section A-A in FIG. 2; FIG. 4 is a section BB in FIG. 2; in fig. 5 is a section A-A in FIG. 2, another variant of the device with a toroidal pneumatic chamber of a spacer assembly; in fig. 6 shows a variant of the device with an axial movement mechanism made in the form of two annular pneumatic chambers placed on both sides of the spacer assembly, a partial longitudinal section.

The device (FIGS. 1, 3, and 4) consists of an impact unit 1 (a pneumatic probe can be used as an impact unit), an adapter 2 mounted on the front part of the impact unit 1 and equipped with stops 3 and 4 (for the convenience of assembly of the device, the Front stop can be made removable), a distance node 5, spaced between the stops 3 and 4 of adapter 2 and including the holder 6 mounted on adapter 2 with the possibility of axial movement, pneumatic chamber 7 connected to the pneumatic trunk, and gasket 8, spring-loaded radial direction spring 9.

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The device is equipped with an axially-up mechanism pressed against the end of the pipe 13, should

This movement 5 includes an annular pneumatic chamber 10 connected to a pneumatic port and a spring 1I. The plenum chamber 10 and the spring 11 are placed between the front stop 3 of the adapter 2 and the spacer unit 5, the gaskets 8 are placed between the shoulders 2 of the cage 6. The surface of the gaskets 8, which is in contact with the surface of the pipe 13, can be covered with friction material. The pneumatic chamber 7 (Fig. 3) can be made of separate sections of tubular section placed in the grooves of the clip 6, Pneumatic chamber 7 can be made (FIGS. 1 and 5) of a toroidal view covering the clip 6, which allows to increase the thrust force without increase device size.

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The axial movement mechanism can be made (Fig. 6) in the form of two annular pneumatic chambers 10 and 14 placed on both sides of the distance node 5. This allows an increase in the force of pressing the device to the end of the pipe 13.

The device works as follows.

The device (Fig. 1) with the adapter 2 is introduced into the pipe 13 until the stop 4 comes into contact with the end of the pipe 13. Thereafter (Fig. 2, 3 and 5) compressed air is fed into the pneumatic chamber 7, which moves the gaskets 8 up to the stop into the walls of the pipe 13 and centers the device relative to the pipe. The pressure of the pneumatic chamber 7 creates friction forces between the contacting surfaces of the gaskets 8 and the pipe 13. These friction forces fix the gaskets 8 and the entire expansion unit 5 from axial movement relative to the pipe 13. Then, compressed air from the pneumatic line is fed into the annular pneumatic chamber 10, Pneumatic chamber 10, overcoming the resistance of the springs 11. and resting on the opposite node 5, fixed in the pipe 13, acts on the stop 3 of the adapter 2, moving the adapter 2 and the shock node 1 in the axial direction. The stop 4 of the adapter 2 tightly presses against the end of the pipe 13. This sets the seating gaps between the collar 12 of the cage 6 and the gasket 8. Thus, a rigid force is created; the pneumatic chambers 10 connect the device with the pipe 13. The force that the abutment 4 has

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exceed the recoil force of the impact unit 1. The annular shape of the pneumatic chamber 10 allows you to create the necessary force with the dimensions of the device limited by the size of the pipe 13. Since all the gaps are selected and the stop 4 of the adapter 2 is firmly pressed to the end of the pipe 13, the longitudinal axis of the impact unit 1 is located distortions about the axis of the pipe 13. After that, the shock unit 1 is put into operation and, under the action of the shock load, the pipe 13 is immersed in the ground. The shock pulse is transmitted from the impact node I through the stop 4 of the adapter 2 to the end of the pipe 13, the coaxiality of the shock node 1 and tube 13 eliminates the occurrence of lateral oscillation of the pipe and the device. Recoil force impact node 1 is transmitted through

the stop 3 of the adapter 2 and the pneumatic chamber 10 on the expansion node 5 and is perceived by the forces of friction of the gaskets 8 against the pipe 13. Since the force pressing the stop 4 to the end of the pipe 13 is greater than the recoil force of the impact node 1, the gap between the stop 4 and the end of the pipe 13 is excluded . This increases the transmission efficiency of the shock load, and therefore the speed of driving the pipe into the ground.

After driving the pipe 13 to a predetermined depth, the pneumatic chambers 7 and 10 are disconnected from the pneumatic main. The springs 9 pull the gaskets 8 into the interior of the spacer assembly 5, and the springs II move the expansion. pore node 5 in the front extreme position relative to the adapter 2. The device is removed from the pipe 13. It is ready to be installed on the next pipe.

When performing the axial movement mechanism in the form of two annular pneumatic chambers placed along both sides 75 3

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 From the distance node, the device operates as follows (Fig. 6). Compressed air is supplied in the pneumatic chamber 14 by moving the expansion unit 5 to the front extreme position relative to adapter 2. Then the device is inserted by adapter 2 into pipe 13 before the stop 4 contacts the end of the pipe.

0 1J3. The compressed air is supplied to the pneumatic chamber 7, the node 5 is fixed relative to the pipe 13. Then the pnee chamber 10 is turned off. select all the gaps between the elements of the device and the pipe 13

5 and a force that presses the stop 4 to the end of the pipe 13. This force is equal to the full force of the pneumatic chamber 10, which increases the rigidity of connecting the device to the pipe. After this, the impact unit 1 is put into operation and, under the action of the shock load, the pipe 13 is immersed in the ground. After the pipe is submerged to a predetermined depth, the pneumatic chambers 7 and 10 are cut off

5 pneumatic lines and remove the device from the pipe.

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Claims (3)

1. DEVICE FOR DRILLING A PIPE INTO THE GROUND, including a shock assembly, an adapter mounted on it for connecting it to a clogged pipe, a spacer assembly located between the adapter stops and containing a pneumatic chamber with spring-loaded gaskets, characterized in that, in order to increase operational reliability device, it is equipped with a mechanism for axial movement of the adapter, while the spacer assembly is provided with a clip freely mounted on the adapter. 2. The device pop. 1, characterized in that the axial movement of the adapter is made in the form of an annular pneumatic chamber and a spring, which are placed between the spacer unit and the front stop of the adapter. 3. The device according to claim 1, characterized in that the mechanism of axial movement of the adapter is made in the form of two annular pneumatic chambers located on both sides of the spacer unit. figure 1 1416621 A1