RU72991U1 - ROTARY EXCAVATOR - Google Patents

Abstract

The invention relates to mining - to devices for excavation and movement of rock mass and can be used for open mining in the production of overburden work on rocks with strong inclusions. A rotary excavator includes a running gear, a working body in the form of a rotor wheel, an arrow and an auxiliary working body on a telescopic handle, made in the form of percussion devices mounted on a bracket pivotally mounted on the end of a telescopic handle rotating around its axis with the possibility of working movement in two mutually perpendicular planes. The effect is achieved by increasing the intensity of the destruction of strong inclusions by impact, as well as by expanding the technological capabilities of the auxiliary working body capable of destroying both separately located inclusions in the array and their bedding. 1 n.p. f-ly, 1 z.p. f-ly, 7 ill.

Description

The technical solution relates to mining, and in particular to devices for excavating and moving rock mass, and can be used for open mining in the development of overburden with strong inclusions.

A device for loosening hard soils (ed. St. USSR No. 644911, E02F 3/24, E02F 5/30, published in BI No. 4, 1979), including spring-mounted cutters mounted on the rotor and articulated hammers interacting with shanks incisors associated with the hammer by means of an elastic element.

The disadvantages of this device include its energy parameters, insufficient for the effective destruction of strong inclusions, and the lever-spring design of the strikers, which reduces its reliability, which cast doubt on the efficiency of the claimed device.

The closest in technical essence and combination of essential features is a rotary excavator (ed. St. USSR No. 238412, E02f, published in BI No. 9, 1969), including a running gear, a rotor wheel and an arrow, and it is pivotally mounted on the axis of the rotor wheel a retractable boom, on which a dynamic plow is mounted, which is a two-shaft vibrator with directed disturbing force.

The disadvantages of this device include:

- low destruction efficiency of strong inclusions with a plow, in which a vibrator is used as a generator of the disturbing force of the teeth;

- the proposed design of the plow is designed only for the extraction of inclusions lying in the form of thin layers (interlayers).

The technical problem of the proposed solution is to increase the efficiency of open cast mining by increasing the intensity of destruction of strong inclusions by impact, as well as by expanding the functionality of the auxiliary working body.

The problem is solved in that in a rotary excavator including a running gear, a working body in the form of a rotor wheel, an arrow and an auxiliary working body on a telescopic handle, according to the technical solution, the auxiliary working body is made in the form of percussion devices mounted on an arm pivotally mounted at the end the telescopic handle rod rotating around its axis with the possibility of working movement in two mutually perpendicular planes.

The implementation of the auxiliary working body using highly efficient compact percussion devices capable of destroying rocks with a strength of up to 80 ÷ 100 MPa will increase the efficiency of rotary excavators in the development of overburden with strong inclusions.

The fastening of the bracket with shock devices at the end of the telescopic handle rod rotating around its axis by means of a hinge and control mechanisms (for example, hydraulic jacks) expands the technological capabilities of the auxiliary working body and the excavator as a whole and allows

it should be destroyed both separately located in the array of inclusions, and their bedding.

It is advisable to install percussion devices with the possibility of movement in a plane passing through the axis of the percussion devices. This allows, by varying the distance between the shock devices, depending on the strength of the destructible inclusions, to reduce the specific energy of destruction, which expands the capabilities of the auxiliary working body and increases the overall efficiency of the auxiliary working body and the entire rotary excavator.

The essence of the technical solution is illustrated by an example of a specific design and drawings, where Fig. 1 (side view), Fig. 2 (top view) shows a general view of a bucket wheel excavator during fracture of formation inclusions; figure 3 (top view), figure 4 is a section aa in figure 3 shows a General view of a bucket wheel excavator in the destruction of individual inclusions; figure 5, 6 shows the node of the auxiliary working body - bracket with percussion devices; figure 7 shows a view of figure 6.

A rotary excavator (see Figs. 1-4) comprises a running gear (not shown in the drawing), an arrow 1 with an axis 2, mounted on its head part. A working body in the form of a rotor wheel 3 and an auxiliary working body consisting of a telescopic handle 4 with a retractable and rotating around its axis rod 5, an arm 6 attached to the rod 5 with a hinge 7 and a hydraulic jack 8, and two shock devices are mounted on axis 2 9, mounted on an arm 6 with a sliding mechanism, consisting (see FIGS. 5-7) of a screw 10 with gear 11, bearings 12, a jack 13, a rod-rack 14, nuts 15 and a slider 16. To balance the auxiliary working body with its operation in rotation mode is provided against ec 17 (Figures 2, 4) representing

a platform on which the drive device of the auxiliary working body is located, and also, if necessary, a counterload can be placed.

A rotary excavator operates as follows.

When bedding strong inclusions, the auxiliary working body is configured to work in plow mode. To do this, the telescopic arm is rotated by the rotation drive to the level of the strong interlayer and, with the help of the clutch and brake (not shown in Fig.), Is fixed at this level. Impact devices 9 using a jack 13 with a rod-rail 14, a screw 10 with a gear 11, nuts 15 and a slider 16 are mounted on the bracket 6 at the required distance from each other, taking into account the strength of the destructible inclusion. The bracket 6 with shock devices 9 using a hydraulic jack 8 and the rotational movement of the rod 5 is installed relative to the removable layer so that the axis of the working tools (teeth) of the shock devices 9 are inclined to the tangent path of the arrow 1 of the bucket wheel excavator at an angle α of 25 ÷ 30 °. After that, the rotation mechanism of the boom 1 of the rotary excavator is turned on, the rod 5 of the telescopic boom 4 is extended by the value h of the removed chip, and the process of excavating a strong interlayer begins. If there is one layer in the array, you can simultaneously turn on the rotor wheel and the auxiliary working body - plow. With two or more interlayers, interlayers with strong inclusions are first removed with the help of an auxiliary working body, then the massif is worked out by the rotor wheel of the excavator.

With the location of strong inclusions in the form of separate boulders and zonal formations, the auxiliary worker

the body is set to rotational operation. The telescopic handle 4, playing the role of the handle of an excavator, rotates in a vertical plane parallel to the plane of rotation of the rotor wheel 3. After the destruction of all strong inclusions, the rock mass is excavated by the rotor wheel of the excavator.

Claims (2)

1. A rotary excavator, including a running gear, a working body in the form of a rotor wheel, an arrow and an auxiliary working body on a telescopic handle, characterized in that the auxiliary working body is made in the form of percussion devices mounted on an arm pivotally mounted on an end rotating around its axis rod of the telescopic handle with the possibility of working movement in two mutually perpendicular planes. 2. The rotary excavator according to claim 1, characterized in that the percussion devices are mounted to move in a plane passing through the axis of the percussion devices.