SU564401A1 - Four-pillar steel over-mine headwork - Google Patents

Description

(54) FOUR-WASTE STEEL OUTLINE COUPER

FIELD OF THE INVENTION The invention relates to shaft heads and can be used in the coal and mining industries.

Four-post steel naps are known, consisting of a machine tool, a head and a boom rigidly connected to the head by means of an upper support. The jib, keeping the machine from tilting in the direction of the lifting machine, is usually made in the form of a flat or bulk metal truss, the metal intensity of which is obsh, its copra mass. As the height of the copra increases, it is necessary to increase the total area of the cross section, which leads to an increase in the bending moment from its own mass 1.

Known also copra with boos, equipped with a light Sprengel, reducing its normal length in the facade plane.

Such copra have insufficient nesui: her ability, since Sprengel is experiencing very little effort only on its own weight 2.

The purpose of this invention is to increase the capacity of the copra. This purpose is achieved in that the upper support of the strut is provided with a device for longitudinal mixing it with respect to the strut rod rigidly connected to the strut and cable-stayed trusses placed on the strut.

The device for longitudinal movement of the upper support with respect to the rod of the boom can be made in the form of brackets and hingedly connected with two double-arm levers, one ends of which interact through the upper support with machine tool of the rifle, while others are hinged with the cable-stayed trusses.

FIG. 1 shows the proposed upper slider, the general view; in fig. 2 - view A of FIG. one; in fig. 3 is a section along BB, FIG. one; in fig. 4 shows a section bb of FIG. 2; in fig. 5 is a sectional view of FIG. 2; in fig. 6 is a view of D FIG. 2. A four-column steel headpile drill (Fig. 1) consists of a machine 1, a head 2 and

5 of the strut 3, which contains the upper support 4 (Fig. 2), the central rod 5 and the foundation support 6. The pressure flange 7 (Fig. 3, 4), reinforced with kerchiefs 8, is welded to the middle rod of the upper support. At a distance of 700-900 mm from its lower plane inside the rod is welded a cross 9 with a flange 10 serving as a stop to limit the movement of the upper support relative to the central rod 5. The upper part of the inner surface of the central rod is reinforced with ribs

stiffness 11, and the end of the pipe - flange 12.

The central rod is provided with brackets 13, diaphragms 14 (FIG. 5) and a lower flange 15 (FIG. 6), with which it is attached to the flange 16 of the foundation support. The diaphragms are made of sheet steel and reinforced with gussets 17 (Fig. 5), having eyes, in which racks 19 are fixed to axes 18. In brackets 13 (Fig. 3, 4), hinged levers 21 are fixed to axes 20 K. 22 cable-stayed trusses are attached to the studs on them. The guy-farm consists of upper and lower trusses, made of high-strength steel of a round profile, which are spaced apart with respect to the axis of the strut and the diaphragms. The lower ends of the joint are threaded and passed through the holes of the flanges 15 and 16 (Fig. 6). The struts 24 unite a pair of cable-stayed trusses into a single node (ft. 5).

After installation of the scraper;: and the hinge on the guide pins of the lifting ropes, the cable trusses are tensioned by nuts 25. The pivot levers 21, connected by straps 22 to cable-stayed trusses, rotate around the axes 20 and shoulders on the bearing surface of the pressure flange 7 , move the upper support along the axis of the boom upwards. This leads to the deformation of the machine, i.e. its elements acquire a stress state opposite to the signs of the stress state when tensioning the hoisting ropes. In this state, on savantovye ferms, they are fixed permanently by welding to kerchiefs 26 (Fig. 6).

Tensioning the hoisting ropes, with the most loaded vessels, create a load on the pile driver. In this case, the upper support is relocated to the initial position before the flanges 10 and 12 (Fig. 3) are in contact, the machine deformations are eliminated, and the cable bar farms thereby receive additional forced stresses, which are controlled, like the deformations of the machine racks, by strain gauges. In this position, the top support of the mounting plate is fixedly connected to the central rod. The pile driver as a whole will be in the tense state while maintaining the geometry.

The use of this invention will increase the carrying capacity of copra and reduce its metal consumption by 20-30%.

ten

Claims (2)

1. Four rack steel overhead a driver, including a machine, a boom and an upper support connected to it, rigidly connected to the head of a tractor, characterized in that, in order to increase the carrying capacity of the copra, the upper support is provided with a device for longitudinal movement relative to the boom rod rigidly connected to the boom, and cable-stayed trusses, placed on boilers. 2. Koper II. 1, characterized in that the said device is made in the form of armlets and hinged double-arm levers, one ends of which interact via an upper support with a pile driver, while others are hinged with cable trusses. Sources of information taken into account in the examination: 1. Cloric V. Q. Installation of metal structures of coal beds. Ugletekhizdat, M., 1954, p. 119. 2. Havin Ya. M. Constructed and built on the surface of Schacht, Ugletehizdat, M., 1950, p. 61-62. FIG. one Wigg 15 sixteen 25