SU1139821A1 - Apparatus for forming holes with expansions for cast-in-place piles - Google Patents

Abstract

DEVICE FOR EDUCATION WELLS WITH EXTENSION UNDER FILLING PILES, including a bar located inside the body, an expander and a screw tip, characterized in that, in order to increase drilling performance, the bar is filled in the form of a crankshaft, installed with the possibility of turning by 180, - and the expander - in the form of blades mounted on the crankshaft and having a spiral shape; with the third in the housing there are spirally arranged windows in which the blades are installed with the possibility of reciprocating first The rooms and the helix of the handpiece and the helix of the windows in the housing are directed in opposite directions.

Description

The invention relates to the construction, in particular to devices for the formation of well wells in the ground, which are used for the production of ramming piles. five

Known for drilling installation MBS-1.7 on the basis of the crawler crane E-1258. Installation has the replaceable equipment in the form of the screw drill, the widener and other devices. The well is drilled with auger drill by cyclic operations. The broadening is drilled by the opening of the St3 extender.

The disadvantage of this installation is that, if necessary, the broadening of the well is produced by interchangeable equipment.

Closest to the proposed by the technical essence and the achieved result is a device for the formation of a well with broadening, including a rod located inside the body, a reamer and a spiral tip, in the device during rotation drilling occurs, during the reverse course and reverse of rotation - expansion of the well 2 .

The disadvantage is that the drilling and broadening occurs cyclically, and the walls of the well and the widening 30 are not sealed.

The purpose of the invention is to increase the productivity of drilling.

This goal is achieved by the fact that in the device for the formation of a well-35 gland with broadening under ramming piles, including a rod located inside the body, a reamer and a spiral tip, the rod is completed in the form of a crankshaft, installed with a possibility of 180 ° rotation, and the expander - in the form of blades mounted on a crankshaft and having a spiral shape; in this case, arranged in a spiral window, 45 in which the blades are installed with the possibility of reciprocating movement, and the spiral ik and the helix arrangement of windows in housing-i are directed to opposite sides} 50

FIG. 1 shows the device, operating position, general view; in fig. 2 is the same in the working position, a longitudinal section; in FIG. 3 is the same in the process of drilling a well; FIG. 4 to 55 shows the well in the process of forming the broadening; in FIG. 5, removing the device from the well.

The device for the formation of a well. The grooves with the expansion under the ramming piles includes a screw spreader 2 fixed to the rod 1, and a sleeping tip 4 is rigidly fixed to the lower end 3 of which the working blades 8 are screwed surface. The removal of the blades 8 is proportionally reduced from bottom to top due to the different arrangement of the necks 6 of the crankshaft 7 relative to the longitudinal axis of the device. In the upper part, the crankshaft 7 is rigidly attached to the rod 1, which has an abutment 9 in the lower part. within 180 °, which ensures the opening of the blades 8 and their closing within the housing 5. The spiral tip 4 is rigidly attached to the lower part 3 of the housing 5; The spiral surface 12 decreases in diameter from top to bottom, its lower edges are provided with blades 13. In the lower part, the tip has a spike 14.

The device works as follows. The device is centered by a point 14 at the site of formation of the well 15. The rod 1 is driven by a drive (not shown) in a clockwise rotation with simultaneous axial pressure, resulting in a hole 15, With this working blade 8 screw spreader 2 are in a closed position within housing 5.

After the formation of the well 15 of the required depth is completed, the direction of rotation changes, as a result of which the working blades 8 are advanced, the stop 9 of the rod 1 is fixed by a clamp 10 on the housing 5 and the blades and with further rotation of the device are inserted into the soil, forming a helical widening 16 on the walls of the well 15, while the device is moving upwards.

After the formation of the screw broadening 16 in a given part of the well by rotation in opposite direction.

the opposite direction (clockwise — as well as along the entire length of the well,

ke) are removed in the housing 5 workers and in any part of its trunk, the blades 8 and the device is retrieved Labor productivity when the well is installed. The drilling of wells with increasing expansions The proposed device allows 5 times, since the labor costs to keep the well and the screw wider working bodies are not required .

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Claims (1)

DEVICE FOR EDUCATION 'WELLS WITH EXPANSION UNDER STREETED PILES, including a rod located inside the body, an extender and a screw tip, characterized in that, in order to increase drilling performance, the rod is made in the form of a crankshaft installed with the ability to rotate 180 ° , And the expander is in the form of blades mounted on a crankshaft and having a spiral shape, while in the case there are made spiral-shaped windows in which the blades are mounted with the possibility of reciprocating tensions, and the spiral of the tip and the spiral of the arrangement of windows in the case are directed in opposite directions. 00 ss 00 bs>