SU575286A1 - Scraper of double-chain scraper conveyer - Google Patents

Description

I

This invention relates to conveyor transport. It can be used in working scrap conveyors.

Traction bodies of the scraper conveyors are known, to increase the rigidity of which a larger caliber chain and increased mass scrapers are used.

However, such traction rrsans are metal consuming and do not ensure normal operation in long holes and on thin layers.

The closest technical solution known is the double-chain scraper conveyor scraper, which includes a deformed, and, in the middle part, an I-beam profile, upper and lower flanges. The ends of the scrapers are fixed in chains with the help of connecting links. Scrapers are made in the middle part in the form of a spiral in such a way that they are arcuately curved towards the side of the carrying pan and evenly adhere to it.

Such an embodiment of the scrapers provides an increase in the moment of resistance to bending of the scraper only in the plane of its movement, and in the vertical plane the moment of resistance, on the contrary, is reduced. For this reason, under the action of the transported rock mass and pieces of rock and coal getting under the scraper at the moment of passing through the drive head and passing through the drive drums, the latter bends upwards. The scraper bent upwards loses the transporting capacity, and this creates additional operational inconveniences.

The goal. the invention is to increase the rigidity of the c-rake in the horizontal and vertical planes

This is achieved by the fact that the upper shelf of the middle part is arcuately curved and turned at an angle in the direction opposite to the movement of the scraper.

FIG. 1 shows a section of a traction body with a scraper} view in place; in fig. 2 is a scraper conveyor, cross section (first embodiment, in Fig. 3 - section A - A in Fig. 1; fng. 4-6 - the same (second embodiment)

Claims (1)

The traction body of the scraper conveyor includes traction chains 1, scrapers 2 and connecting links 3., having an I-shaped cross-section with the upper 4 n lower 5 shelves, made in the middle part rotated at some angle along the longitudinal axis. To ensure equal scraper strength along the horizontal and vertical axes, the noiiopoia 5 angle of the middle part of the scraper is within the limits of 42 ° -3 °. The moment of resistance to bending of scrapers made of I-beams by turning them in the middle part by the specified angle increases more than & 2 times compared to serial scrapers. The angle of 42 ° -3 ° is the angle of direction of the resultant from the horizontally directed force P of the drag of the material being transported and from the vertically directed force P created by stabbing the scraper with the same material. Such a scraper is manufactured by stamping, the process of which is easily automated and can be in-line. The punching mechanism consists of two rotations, each in different directions with the same speed of the drums, on one of which the dies are located, and on the other - punches. Thus the scraper is easy to manufacture. The longitudinal bulge on the scraper, formed as a result of turning the middle part by 45 °, favorably affects the increase in the durability of the traction chains, so that the convexity formed in the lower shelf of the scraper lifts the ends of the scraper and thereby eliminates the contact of the traction chains with the pan bottom . In this way, premature wear by friction of both chains and pan elements is eliminated. In addition, the conditions for unloading the material being transported from the scrapers when passing them through the drive drum are improved. The transported material is easily dropped from the inclined plane of the scraper by centrifugal force, as a result of which it is less pulled under the conveyor. Another embodiment is possible in which in the middle part of the scraper not two shelves of an I-beam profile are rotated, as in the first embodiment, but only one shelf, while the second shelf remains straight with a small crotch, due to which a gap h is formed. This crotch is obtained automatically in the process of twisting the opposite flange of the profile. The production technology of scrapers according to the second variant, as experience of production has shown, is simple and cheap. It is fully integrated with the operations of cutting, chamfering, and punching holes on one die. Thus for the manufacture of the proposed scrapers additional material and labor costs are completely absent. This second embodiment of the scraper is dictated by the actual shape. Their deformation during operation, so it is preferred. Observations during the operation of the scrapers on the downhole scraper conveyors and in the process of testing them at repair facilities noted that the amount of deformation (bending and twisting) of the scraper is stable. Claims of the invention Double-chain scraper conveyor belt comprising an I-section and shelf profile deformed in the middle part, characterized in that, in order to increase the scraper's rigidity in the horizontal and vertical planes, the upper shelf of the middle part of the scraper is arcuately bent and turned at an angle opposite to the side scraper movement. fui 1 fPui 3 I. L Puiit fui s