RU2176716C1 - Percussive device for making holes in ground - Google Patents

Abstract

FIELD: construction industry; applicable in laying of pipes, high-voltage cables and telephone cables, and also in construction of floodgate and drainage channels. SUBSTANCE: percussive device consists of body accommodating hydraulic hammer and anvil in the form of hollow cylindrical body with truncated cone whose front end face has a circular cutter. Hollow cylindrical body houses jets and service lines for supply of emulsion solution. Located in the cone secured by four radially positioned cutters at an angle to one another is an activator which consists of high-speed hydraulic motor supplied from remote pumping station and cantilevered auger with variable lead of helix. EFFECT: higher productivity of hole making in ground and reduced power consumption. 2 dwg

Description

 The device 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 shock pulses from it; a pipe laid in the ground with the help of this device is attached to the unloading chamber [1].

 The disadvantages of the known device are the low productivity of pipe laying by increasing the resistance force with each advancement into the ground and the limited length of pipe laying.

 The closest in technical essence and the achieved result is a percussion device for the formation of wells in the soil, including a body, anvil, a hollow tip in the form of a cylindrical body with a truncated cone, the front end of which is equipped with a ring knife, and placed inside the hollow tip at an angle to each other four radially cutting knives [2].

 The disadvantage of this device is the inadequate conditions for removing core from the pipe, as a result, the core is compressed inside the pipe being laid and its progress is blocked and high energy consumption is required for punching solid soils.

 The problem to which the invention is directed, is to provide opportunities to increase productivity and reduce the energy consumption of pipe laying.

 This is achieved by the fact that in the percussion device for the formation of wells in the soil, including the casing, the anvil, the hollow tip in the form of a cylindrical body with a truncated cone, the front end of which is equipped with a ring knife, and four radially dissecting inside the hollow tip at an angle to each other of the knife, according to the invention, an anvil is installed in the hollow body of the tip, nozzles are placed, communications for supplying the emulsion solution and rigidly fixed to the body by means of radial dissecting but the cowl in which the activator is located, consisting of a high-torque hydraulic motor and a cantilever-fixed screw with a variable pitch of the spiral.

 The invention is illustrated by drawings, where in FIG. 1 shows a percussion device for forming wells in the soil, FIG. 2 is a section along AA in FIG. 1.

 The device consists of a housing 1, in which a hydraulic hammer 2 is placed, a hollow tip in the form of a cylindrical body with a truncated cone, an anvil 3 is installed in the housing. The front end of the hollow tip is equipped with an annular knife 4, and a tip 5 is placed inside its housing, in the cowling of which is placed an activator, consisting of a high-torque hydraulic motor 6, powered from a remote pumping station and a cantilever-mounted screw 7 with a variable helix pitch. The fairing is rigidly fixed inside the hollow tip body with four radially dissecting knives 9, located at an angle to each other. Inside the hollow tip behind the radially dissecting knives 9 are nozzles 8 and communications for supplying an emulsion solution, providing a core wash.

 The device operates as follows.

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

 In the process of moving into the ground, the body of the hollow tip compacts the soil into the borehole walls, with the help of an annular knife 4, the core is contoured, which is then cut by radial knives 9 and tip 5 during the movement of the body of the hollow tip 5. An emulsion solution is supplied under pressure through the nozzles 8 under pressure in the direction of movement of the core, providing its erosion and flow towards the screw 7 with a variable pitch of the spiral.

 In the proposed device, the goal is to increase the productivity of laying wells in the ground and reduce energy consumption for conducting wells by improving the conditions for extracting core from the pipe being laid, which is achieved by constructive execution of the elements of the body of the hollow tip, allowing washing and transportation of the core.

Sources of information
1. A.S. USSR N 1699189, class E 02 F 5/18.

 2. RU N 2134746, class E 02 F 5/18 - prototype.

Claims (1)

 The impact device for the formation of wells, including a body, anvil, a hollow tip in the form of a cylindrical body with a truncated cone, the front end of which is equipped with a ring knife, and four radially dissecting knives placed inside the hollow tip at an angle to each other, characterized in that in the floor an anvil is installed in the tip body, nozzles are placed, emulsion solution supply communications and a fairing in which the fairing is located, which is rigidly fixed to the body by means of radial cutting knives activator, consisting of a high-torque hydraulic motor and a cantilever fixed screw with a variable pitch of the spiral.

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