SU1760069A1 - Rift forming device - Google Patents

Abstract

Use: to develop narrow deep gaps in the ground, mainly when installing anti-seepage curtains and supporting structures erected by a wall on the ground method. 0 Essence: blade bits fixed on parallel rods are installed at the same level and with the possibility of one blade bits entering the gaps between adjacent blades of the neighboring bit, 4 silt

Description

The invention relates to a drilling technique and is intended for the development of narrow deep gaps in the ground, mainly with the installation of antifiltration curtains and supporting structures constructed by means of

wall in the ground ..

Trenching devices are known that contain a submersible multi-spindle drilling unit with a three-stage arrangement of rock-breaking tools. (See „a„ p. D 6E7648, class E 02 F 5/02, 1974, article by Goncharov P.Е., the King of Bf% et al. “On the test results of an experimental sample of the BM-25 / 0.5-ЗШ barrage machine in saturf drainage, mine hydrogeologists, special mining, hydraulic engineering .1 Belgorod, 1980, s, 40-45)

A device for penetrating a continuous ditch is known, in which the drilling rig is equipped with rock-breaking tools located on two levels (see Japan N 52-16325, Cl.02 D 17/14).

The disadvantages of the known devices are that due to the location of the rock-cutting tools at different levels it is necessary to produce excessive re-drilling of the rock. Moreover, since the rock-breaking tools are not self-cleaning, when sinking

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rocks, they are clogged with rock, which reduces the speed of the dredging and increases the time for penetration of the slot,

A device is known for forming gaps in a rock massif (cf. a.c., No. 317791, class E 21 C 17/00), the essence of which is as follows. The device includes a mechanism of percussion-rotational action, associated rods connected to each other in one row by links and equipped with crowns installed at the same height and at a certain distance from each other. The links are located behind the crowns and are provided with shear elements. These serve to destroy the breed formed between the crowns.

Disadvantages of the device: since the crowns are spaced apart from one another for a distance, when the cracks in the viscous rocks penetrate into the rock, and, moreover, since the rock crowns and shear elements are located at different levels, the rock has to be over-drilled

A device for driving narrow trenches, adopted as a prototype, is known (see, а.с. N 757651, CL Е 02 F 5/20, 1977), which consists of a submersible unit with a load and three spindles, the spindles are located in one row and parallel to each other, and the bits are set in three levels

The drawback of the device is that the bits are located in levels, which leads to re-drilling of the rock by an amount equal to the difference in the level of bits, and the lack of self-washing of the bits leads to their sticking of viscous rock and loss of machine productivity.

The goal of the proposed solution is to increase the productivity of the device by avoiding over-drilling the gap while ensuring self-cleaning of the bits during drilling in soft viscous rocks.

This goal is achieved by the fact that, in the known device for the formation of gaps, including a submersible drive with a gearbox and mounted in a row and parallel to each other on the output shafts of a gearbox rod with drilling blades, these bits are placed on the same level, while adjacent bits us-

Installed with the ability to go in a plane, perpendicular to the axis of the rods, the blades of one bit into the gap between the adjacent blades of another bit.

Since the set of features that distinguishes the proposed technical solution from the prototype, as well as the new property of this set, was not found in the sources of information, the claimed slotting device meets the criterion of significant differences.

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Fig „1 shows the proposed device, a general front view with a partial section; figure 2 - section aa in figure 1; on figs and ts - section jj-b in fig „1 (variants of rock-cutting tool in the form of three-bladed and multi-blade bits).

The device contains a submersible drive 1 (Fig „1), consisting of electric motors 2, gearboxes 3 and transfer box 4, located in housing 5 with insulator 6" Output shafts 7 (fig 2) transfer case k are connected with rods 8 e.g. a key 9, wherein the rods are installed in one row in parallel to each other.

The actuator 1 provides rotation of each adjacent pair of rods 8 in opposite directions (arrows in Fig. 1 show the direction of rotation of the rods). On the rods, rock-breaking bits 10 with cutting blades 11 are fixed without angular slippage. one height Possible variants of rock-breaking bit 10. For example,: they can be made in the form of three to five plastic bits, as shown in FIG. 3 / or multi-blade bits (see FIG. M.

Adjacent bits 10 are installed with the possibility of entering into the plane, the front axle of the rods 8, the blades of one bit 10 into the gap between adjacent blades 11 of another bit 10 (Fig. 3). An air-lift 12c is connected with the device with a suction tip 13. The device is suspended on cables 14 to a base machine (not shown in the drawing).

The power supply to the device is fed through an electric cable 15.

The device operates as follows:

By turning on the electric motors 2, the rotational movement is transmitted to the rods 8 through the reduction gearboxes 3 transfer case and fixed, for example, keyway 9 or flange connection of the rod 8, together with rock-breaking bits 10, due to the rotational and translational movement, the rock 16 is developed.

The forward movement is carried out by means of cables 1, connected through a system of tackle to a traction winch (not shown). To flush the rock of the damaging bit from the slurry pump (not shown), the clay solution 18 is fed to the washing hose 17. which carries the destroyed rock 19 out of the bottom. The destroyed rock 19, together with the clay solution 18, is brought to the surface by an airlift 12 (indicated by the arrow in the drawing). The clay mud is separated from the rock, the rock is fed into the dump, and the mud is It rotates clear wa into the slot. When developing in the sik. soils cutting blades 11 of each bit 10 enter the gap between the lobes of the 11 neighboring bit 10 and clean the latter from adhering rock. By rotating each adjacent rod 8 in opposite directions without angular slippage, jamming of the cutting blades of adjacent bits is prevented. Upon reaching the design elevation, the device is removed to the surface, moved to the next value in the direction of penetration of the slot, and the cycle of work is repeated

PRI me R "Drilling unit bar

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This includes a drive consisting of two A180M UL type electric motors with an installed power of 2 x 30 60 kW, two gearboxes and a transfer case for a bit rotation speed of 1.33 (80 rpm). Chisel diameter 90 mm. L. Bar diameter 137 mm. - Distance between bar mmo Gap between bar is one bit and bar of the next bit 2 mm.

The use of the proposed device will prevent sticking of viscous soil to rock-breaking bits by self-cleaning of bits and, at the same time, eliminate re-drilling of the gap by the amount of difference in the level of installation of rock-cutting tools, which ultimately increases the productivity of penetration of the gap,

Claims (1)

5 claims A device for forming gaps, including a submersible drive with a gearbox and installed in a series and parallel one another on the output shafts of a gearbox rod with boring blade bits, characterized in that, with the exception of 5 re-drilling the gap while ensuring self-cleaning of the bits while drilling in soft viscous rocks, the vane chisels are placed at the same level, while the adjacent vane ones The 0 bits are installed with the possibility of entering in the plane perpendicular to the bar of the blades of one bit into the gaps between the adjacent bits of the bit next to it. razhnoy machine submersible, triple-45 Si Bb FZH Fm.2