SU137865A1 - Installation for drilling vertical shafts of mines - Google Patents

Description

Installations for the complex construction of shah shafts are known. in which, at the same time as drilling the shaft, the construction of permanent supports is foreseen.

The difference with the described installation for drilling vertical shafts is that it is equipped with a differential milling and crushing actuator with split rods, which receive rotation from two independent drives with an adjustable number of revolutions. The presence of such an executive body makes it possible to destroy rocks by milling and crushing, depending on their strength. A feature of the proposed installation is also the fact that it is equipped with a paver consisting of radial jacks, face press and rotating formwork, an application that allows you to automatically erect a permanent support of a single-turn helix of extruded monolithic concrete. In addition, for automatic control of the vertical drilling of the barrel, the installation is equipped with two level switches located crosswise on the drill string.

FIG. 1 shows the described installation in general; in fig. 2-executive body; in fig. 3 paver in two projects; in fig. 4- level switch.

The installation is a structure of three horizontal shelves rigidly connected to each other and mounted in a cylinder formed by sliding formwork / and 2, formwork - by the rotor 3 of the concrete paver and the tunnel shield 4. On the upper safety shelf a receiving platform 5 of the self-unloading skip-container 6 dl is mounted - the supply of concrete to the intermediate hopper 7, which is equipped with a filling level indicator. From pro # 137865-2 -

Intermediate hopper concrete rotating conveyor 8 is reloaded into the hopper 9 concrete paver.

The axial force obtained as a result of the screw movement of the paver's rotor is transmitted to the executive body with a drill / 2 by means of pressure hydraulic jacks 10 with adjustable force. An actuator with a drill bit is mounted on the column / - and consists of a three-beam crosspiece, each beam of which carries a rod with working discs (cutters) 14 and drives / 5 of these Ylang RD-40 hydraulic motors. The cross is fixed on the main shaft 16, the axis of which coincides with the axis of the drilled shaft. The rods on which the working discs are fixed are cut and consist of Canada in three parts. The two peripheral parts of the rods are driven in rotation around their axes by two sneaked hydraulic motors DG-40. The central parts of the three rods are driven around their axes by four TD-40 hydraulic motors, which simultaneously rotate the indent and are located in the center of the column. Working discs (cutters-sharoshki) are rotated around the axes of the rods and, moreover, around the main axis, in connection with which the tools of the working disks receive an absolute movement along the spherical elongated epicycloid, with the loops of the epicycloid facing the face. Working discs are installed; on the rods so that their tools cover the entire bottom, i.e., the concentric slots in the bottom are not cut, and each disc processes a certain surface of the bottom in the form of a ring; these rings are adjacent to each other.

At constant pressure of the fluid supplied to the hydraulic motor, the rotational speed of the output shaft depends only on the amount of fluid passing through the turbine of the engine. By varying the amount of fluid supplied to the hydraulic motor of the carrier, a gradual change in the ratio of the speed of the portable and relative carrier of the carrier and the milling cutters is achieved; The milling cutters at this time rotate at a constant speed.

Thus, if the circumferential speed of the tooth of the milling cutter in its relative rotation exceeds its circumferential speed in the rotational rotation, then the milling mode of the rock is performed; if the circumferential speeds of the tooth of the milling cutter in both its directions are equalized, then the sharon1 milling cutter is free to move around the face, i.e., the crushing of the rock is crushed.

Washing in the bottom is carried out in a combined way. Water, flushed from the surface to feed the hydraulic motors, having passed through the turbines, falls under the cutters of the milling cutters and washes away the drill rigs. With a noMouin level switch, the water level at the bottom is constantly maintained at a height of 3 liters from its center. The pulp is contained, and the drill cuttings and larger pieces of rock come to the center of the bottom, where the coal sump comes to the surface.

The mechanism for the construction of permanent lining - the paver consists of a rotating formwork - a rotor 3, supported by a ring, on which it rotates. On the outer surface of the formwork there is a spiral protrusion 17 designed to abut it at the end of the roll; The paver consists of a metering hopper 9, a radial 18 and a face J9 press.

Concrete from the metering chamber enters the working chamber, the hydraulic jack of the radial press is turned on forwards and pressed another portion of it; at the same time, the concrete is in a closed space: with a vertical wall serve - on the one hand, a punch of the end press, on the other - rock wall and then, end of the previous portion of concrete. At the bottom, the concrete abuts against the spiral support of the rotating formwork, and at the top it is limited to the previously laid concrete. Then the pressure in the cylinders of the radial press is released and its position is firmly fixed. Turns on the working stroke of the end press, driven to work by the cylinder 20.

Due to the fact that concrete is no longer compressible, the end press serves mainly to rotate the rotating formwork. During the turn of the formwork, its spiral end stop, having a helical surface, slides over the end of the laid concrete, creating an axial pressure transmitted to the lower rim, on which the hydraulic jacks that feed the executive bodies to the bottom are supported. After the cylinder rod 20 is fully extended, the entire system (both presses) returns to its original position and the cycle repeats.

As the form is rolled, the rotary formwork is lowered and, following it, the sliding formwork slides onto the concrete.

The control of hydraulic jacks, as well as the concrete laying mechanism, is carried out automatically by means of hydraulic control circuits.

In connection with the fact that the shaft of the shaft, when sinking through the installation described, is not filled with liquid, the verticality of the trunk is monitored by the usual surveying methods. For constant monitoring of the direction of drilling, a level switch is used, which is a hollow brass tube 21 with curved ends, on which a brass boss 22 is screwed. A dielectric plug 23 is screwed into the boss, and brass nut 24 with a screwed brass electrode is screwed into the boss 25. In the lower part, the electrode passes through the second stopper. 26. A conductor 27 is connected to the brass wire and passed through a rubber seal in the cap 28. The tube is filled with mercury. A plastic tube 29 is inserted into the knee of the tube. Outside, a wire spool is wound around a brass tube, encased in a plastic 30 case. The level switch is mounted crosswise on the column.

When the unit deviates from the penetration axis, mercury rises along the bend of the tube and closes the circuit between the electrode and the tube and transmits the command to the solenoids controlling the actuator jacks.

Subject invention

Claims (3)

1. Installation for drilling vertical shafts niaxT with simultaneous erection of permanent support, characterized in that, in order to carry out rock destruction by milling and crushing, it is equipped with a differential milling and splitting actuator with split rods, which receive vlople, The cutting around its own axis and the axis of the barrel from two independent drives, so that the tooth of the cone relative to the bottom, both in the central part and at the periphery, receive approximately the same speed. 2. Installation under item 1, characterized in that, for the purpose of mechanization of the erection and laying of monolithic pressed concrete but helix, it is equipped with a concrete paver consisting of radial jacks, face press and rotating formwork, while the laid concrete simultaneously serves as an emphasis for submission of the executive body to the face. 3. Installation under item 1, characterized in that, in order to automatically control the verticality of the drilling of the barrel, it is equipped with two level switches mounted crosswise on the drill string, transmitting electrical signals to the solenoids controlling the actuators of the executive organ. - 3 - # 137865 Fig 2 : fe FIG A