SU562213A3 - Device for mechanized coal excavation - Google Patents

Description

(54) DEVICE FOR MECHANIZED COAL EXTRACT

one

The invention relates to equipment for mechanizing the excavation of coal or other minerals by long breaks.

Devices are known for mechanized excavation of coal or other minerals by long strikes on the frontal principle with the use of a chain moving along the roof and soil of the reservoir in guides consisting of sections hinged with each other, with bases and overlaps of supports and pushed together with it, at the same time, wedge-shaped excavation cutters forming the bottom are strengthened on separate links or groups of chain links, while other cut edges are attached to other links or groups of links of the same chain The tube forms a channel, with n successively positioned cutters or groups of them in accordance with the cutting depth in a single pass, a mm deepen the canal by n-a mm, and are located between the cutters and a chain of stripping cutters that remove shtyb from the canal.

In such devices, when the chain operates, there are large traction forces caused by friction about the coal face, and the feed is limited.

The aim of the invention is to provide a continuous channel deepening and a reduction in tractive effort. This is achieved by cutting cutters or cutting groups of

the incisors, arranged in series behind each wedge-shaped excavating incisor, are fixed on the stripping incisors of the same thickness, stepwise, at a distance increasing from each other by a mm.

FIG. 1 is a schematic diagram of the proposed device in the process of shifting, a top view (dimensions along the length of the lava are impressively reduced in order to show the largest part of the lava

stepwise advancement of the bottom, as well as movement of the entire device); in fig. 2-5 are the same; the cross sections along A-A, B-B, B-B and G-D in FIG. 1 in successive mining positions; on fng. 6 - view of the device from the side of the bottom; in fig. 7 - the same, top view (without the top flange of the guide); in fig. 8 is a cross-section of the outer link of the chain along dd in fig. 6

The device contains a mechanized

the support, to the ceilings and the bases of which the guides are fastened. A blade cutting chain is moved along the guides. The guides consist of separate sections, are interconnected pivotally and move to the bottom jointly with the mechanized support. In the drawings, reference numeral 1 denotes a coal face, position 2 denotes a channel passing in front of it. The 3 cutting-edge nanowire has an upper flange with an edge 4, which protrudes the cutting chain, and a lower flange with a leading edge 5, and the edge 5 usually reaches the slab, but during advancement and then a new slab is pushed into the channel 2, found Ice ahead of slaughter. The cutting chain consists of external links 6 and 6 and internal links 7. Link 6 is greater than link 6 in order to protect the chain from escaping from guides 3. The chain contains active and passive sections. Wedge-shaped excavation cutters 8 (see Fig. 2) are fixed on the outer links of the 6 active sections of the chain, followed by the stripping (loading) cutters 9, which have basically the same profile. The cleaning tools have the same width, and their cutting part has a posterior angle and is directed to the bottom of the chest. The front edge of the cutter is adjacent to the face and during normal operation does not crash into the face, but only removes chips in the event of unevenness of the face. Cutting heads 10 with cutters 11 are placed on the stripping cutters, which are intended to deepen the channel. Cutting heads with incisors are fixed on the wiper blades in a stepwise manner relative to the latter, a distance increasing from one another by a mm. FIG. Figure 1 at its right end and between the section lines along A-A and B-B, in each case, shows the effect of seven successively located ground types of such cutters. After the active part of the cutting chain has been cut into the bottom and deepened the channel, the passive section of the cutting chain (see Fig. 4-8), which is initially at some distance from the bottom, corresponding to the width of the stripping tool 9 (see Fig. 4), and then after shifting, it contacts with the face (see Fig. 5). Some links

one

i B

Claims (1)

Fig.6 The chains are provided with wiper blades 12. They have a spade-shaped surface 13 sliding along the formation soil, and the same surface 13 sliding along an extended guide flange. As the cutting chain advances, the notch device (see Fig. 1) moves to the right, the bottom moves forward, the channel deepens, and the automatic controlled movement of the movable support and the cutting chain fixed on it 3 is transmitted to the next parts of the heel. Already moved areas of the support fix a new position, corresponding to P1, its shifting direction. The tilting part of the guide shifts at approximately the same speed as the cutting chain, parallel to it from left to right, retaining its tilted position. Apparatus of the Invention A device for mechanized excavation of coal or other useful minerals by long digging on the frontal prints with orienting a chain moving along the roof and the soil of the formation along guides consisting of sections articulated with each other, with bases and non-covered supports and advanced together with it, and on separate links or groups of links of a chain, wedge-shaped excavation cutters are reinforced, which form the bottom, and on other links or groups of links of the same chain, cut cutters are fixed, which a channel is formed with a clean face, while n successively located cutting cutters or a pile of them in accordance with the cutting depth in a single pass, a mm deepen the channel by n mm and between the cutting cutters and a chain of stripping cutters that remove shtyb from the canal, characterized in that, in order to ensure continuous channel deepening and reduction of traction, cut-in cutters or groups of cut-in cutters, located successively behind each wedge-shaped excavating cutter, are fixed on stripping cutters of the same thickness the steps are stepped at a distance increasing from each other by a mm. ten I 6-7 6.3 g 676 g Fi7.5 FIG. four