RU2134746C1 - Percussive-action device for making bore-holes in ground - Google Patents

Abstract

FIELD: construction engineering. SUBSTANCE: device can be used in laying pipelines, high-voltage and telephone cables, and also for arrangement of flood-water and drain passages. Device had body in which installed are hydraulic hammer and anvil. Anvil is made in the form of sharp-pointed core to which rigidly connected by means of radial cutting blades is tubular guide member with front head-piece in the form of truncated cone. Front end of cone-shaped head-piece is provided with circular blade which is located with lead in relation to core of anvil. Part of body is located inside tubular guide member which compacts ground by its external surface. Application of aforesaid embodiment of percussive-action device allows for higher production capacity in driving bore-holes in ground. EFFECT: higher efficiency. 3 dwg

Description

 The described invention relates to the construction industry and can be used for laying pipes, high voltage cables and telephone, as well as drainage and drainage channels.

 Known working body for trenchless laying of pipelines, containing a percussion device and anvil with a discharge chamber. The unloading chamber is directly connected to the anvil and receives a shock impulse from it; a pipe laid in the ground with this device is attached to the unloading chamber (A.s.SSSR N 1699189, class E 02 F 5/18.

 The disadvantages of this device include the low productivity of pipe laying by increasing the resistance force with each advancement into the ground. This is caused by increasing friction forces in the process of pipe advancement in the ground and core accumulation inside the pipe being laid. Depending on the physicomechanical properties of soils, in some cases the core is compressed inside the pipe being laid and its progress is stopped.

 The disadvantage is the limited length of the pipe. This is because the impulse loads from the installation are transferred to the end of the pipe located in the ground, and the strength and rigidity of the pipes is low.

 The closest in technical essence and the achieved result is a percussion device for the formation of wells in the soil, including a housing and a drive having a hydraulic hammer and anvil, which is made barrel-shaped in cross section (A.S. USSR N 302450, class E 02 F 5/18 )

 The disadvantage of this known device is the low productivity of penetration due to the presence of large drag, due to the displacement of the entire volume of soil into the walls of the well.

 The problem to which the invention is directed, is to increase the productivity of laying wells in the ground.

 This is achieved by the fact that in the percussion device for forming wells in the soil, consisting of a housing in which a hydraulic hammer with an anvil is placed, the anvil is movable relative to the housing and in the form of a pointed core, in which a tubular guide is fixed with radially arranged dissecting knives with the reversed to the ground with a hollow truncated cone, compacting the soil with the outer surface of the cone and cutting it with an annular knife formed by the outer surface of the cone and inner tsil -cylindrical, the annular knife truncated cone located towards the core advancing the anvil.

 The invention is illustrated by drawings, where in FIG. 1 shows a percussion device for forming wells in the soil, a general view; in FIG. 2 - section BB; in FIG. 3 is a view from the side of the ring knife.

 The impact device for the formation of wells in the soil contains a housing 1 in which a hydraulic hammer 2 is located, with a striker 3 and an anvil 4. The latter contains a pointed core 5, in which the blades 6 are radially fixed. A tubular guide 7 is fixed to the peripheral surfaces of the knives with a front sealing soil, truncated cone 8, which contains an annular knife 9, facing the cutting part towards the soil.

 The device operates as follows.

 Under the influence of static force, the device is pressed by a ring knife 9 to the surface of the face. Upon reaching a certain value of static preload, the hydrohammer 2 is switched on. The hammer 3 of the hydrohammer strikes the anvil 4.

 In the process of moving the anvil into the ground, the outer surface of the truncated cone 8 compacts the soil in the wall of the well, using the knife 9, the core is contoured, which then, in the process of moving the anvil, is cut with radial knives 6 and a pointed core 5. It is loosened and transported between the knives, filling part of the well. This reduces drag when advancing the anvil in the ground, which facilitates the advancement of the device and does not reduce its speed of movement. If necessary, cleaning the well from loosened soil can be done with other devices, for example, using a bailer or auger. If the rocks are weak in physical and mechanical properties, then the laying of the well can be carried out under the action of only static force acting through the body and the firing pin on the anvil.

 In the proposed device, the goal is to increase the productivity of laying wells in the ground by reducing the resistance when moving the installation in the ground, which is achieved by constructive implementation of the anvil, which allows to push part of it located behind the ring knife into the walls of the well and compact it, and the rest of the core part it is transported between radial knives in a loose form.

Claims (1)

 A device for forming wells in the soil, consisting of a housing in which a hydraulic hammer with an anvil is placed, characterized in that the anvil is made in the form of a pointed core, to which a tubular guide with a front truncated conical tip, the front end of which is equipped with a ring knife, is rigidly attached with radial dissecting knives , located in relation to the anvil core advancing, and part of the body is located inside the tubular guide, compacting the soil with the outer surface.

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