RU2209755C1 - Triple-chain scraper conveyor - Google Patents

Abstract

FIELD: mechanical engineering; materials handling facilities. SUBSTANCE: invention relates to triple-chain conveyors with traction member and it can be used in mining and other industries on conveyors of increased length and capacity. Proposed triple-chain scraper conveyor contains endless traction member closed in vertical plane on end sprockets and resting on guides of panline flight, and three mechanically intercoupled parallel traction chains with fitted-on scrapers which are secured in turn by their on two outer traction chains. Alternating scrapers are freely fitted with clearances between outer traction chains and are secured on inner traction chain by their central part. Scrapers secured on outer traction chains are provided with cavity in middle part to located inner traction chain. Conveyor is furnished with length of round-like chains, some ends of which are coupled with scrapers secured on inner traction chain, and other ends are connected to outer traction chains either directly or through scrapers secured on outer traction chains. EFFECT: improved reliability of conveyor in operation. 4 dwg

Description

 The invention relates to conveyor engineering, namely to conveyors with a three-chain traction unit, and can be used in mining and other industries on conveyors of increased length and productivity.

 Known scraper conveyors, including a double-chain traction unit, infinitely closed in a vertical plane at the end sprockets, and a trolling stand (RF patent 2006434, 65 G 19/00).

 A disadvantage of the known conveyors is the limited length of the stand, limited by the strength of the chain traction unit.

 Known scraper conveyors, including a traction unit, consisting of three parallel chains with scrapers attached to them, closed in a vertical plane at the end sprockets and resting on guides of the tacking stand (Evnevich A.V. Transport vehicles and complexes. - M .: Nedra, s .40-42, Fig. 12.b).

 However, the disadvantage of the known conveyors is the limited length of the stand, because the third chain does not increase the length of the conveyor, but only increases the reliability of its operation, being a backup in case of breakdown of one of the other two chains. This is due to the fact that the three-circuit contour is a statically indeterminate system in which only two of the three chains can transmit traction due to the unequal elastic and residual elongation of each of the chains. In addition, the existing designs of three-chain conveyors are characterized by high lateral stiffness of the traction body, which makes them difficult to use as downhole, mobile.

 A three-chain scraper conveyor is known, including a traction unit infinitely closed in a vertical plane at the end sprockets and resting on the guides of the pivoting stand, consisting of three parallel traction chains with scrapers attached to them, which are alternately secured with their ends on two outer chains, and alternating scrapers with them freely placed with gaps between the outer chains are fixed to the inner chain and attached to it by its central part, while secured to the outer chains ki in its middle part with a recess for receiving the internal circuit (RF Application 94024986, M.kl. In 65 G 19/00, from 20.02.1996, the).

 However, the disadvantage of the known conveyor is a decrease in reliability compared to a three-chain conveyor with rigid kinematic connections between all the chains of the three-chain circuit due to the fact that when the inner (middle) circuit breaks, the conveyor should immediately be stopped, which makes it difficult to carry out repair and restoration work, especially if the conveyor is downhole.

 The objective of the invention is to increase the reliability of the conveyor.

 The problem is solved due to the fact that in a three-chain scraper conveyor, including a traction unit infinitely closed in a vertical plane on the end sprockets and resting on the guides of the rack, containing three kinematically connected parallel traction chains with scrapers fixed to them, which are alternately secured by their ends on two external traction chains, and alternating scrapers, freely placed with gaps between the outer traction chains, are fixed to the inner traction of the chain with its central part, while the scrapers attached to the outer traction chains are made in their middle part with a recess for accommodating the internal traction chain, the conveyor has segments of round link chains, some ends of which are connected with scrapers fixed to the internal traction chain, and others their ends are connected to the outer traction chains directly or through scrapers attached to the outer traction chains.

 A three-chain scraper conveyor is shown in FIG. 1 is a plan, in FIG. 2 is a cross-sectional view along a pan stand; in FIG. 3 and 4 are variants of the kinematic connection between the outer and inner traction chains.

 The conveyor consists of a traction body endlessly closed in a vertical plane on the end sprockets 1 and 2, consisting of three parallel traction chains kinematically connected to each other - two outer 3 and 4 and inner 5. The scrapers 6 are alternately fixed with their ends on two outer chains 3 and 4 , and alternating scrapers 7 are freely placed with gaps 8 and 9 between the outer chains 3 and 4 and are fixed to the inner (middle) traction chain 5 and attached to it by their central part. At the same time, the scrapers 6 mounted on the outer chains 3 and 4 are provided with a recess 10 in their middle part to accommodate the inner chain 5. The upper and lower branches of the traction body are supported by the guides of the tackle 11. The outer 3, 4 and inner 5 traction chains interconnected by segments of round link chains 12, 13 (Fig. 3) or 14, 15 (Fig. 4), the length of which is taken to be greater than the distance between the kinematically connected elements.

 As kinematically connected elements can be taken the ends of the scraper 7, mounted on the inner traction chain 5, and the outer traction chain 3 and 4. These elements are interconnected by segments of round link chains 12 and 13 (Fig. 3). As kinematically connected elements can be scrapers 6 and 7, mounted respectively on the outer 3, 4 and 5 inner traction chains. These elements are interconnected by segments of round link chains 14 and 15 (Fig. 4).

 Kinematic connections between the inner 5 and outer 3, 4 chains can be made in increments of the length of the conveyor, a multiple of the distance between the scrapers (Fig. 3). Each scraper 7, mounted on the inner traction chain 5, can be kinematically connected with the outer traction chains 3 and 4. Both end sprockets 1 and 2 can be driven and provided with drive units 16.

 Three-chain scraper conveyor operates as follows. When the drive units 16 are turned on and the end drive sprockets 1 and 2 are rotated, the traction force is transmitted to the outer traction chains 3, 4 with the scrapers 6 and the inner traction chain 5 with the scrapers 7, which allow the load to be moved along the lattice stand 11. Since the outer chains 3 and 4 are structurally are not rigidly connected with the internal chain 5, but through the segments of round link chains 12, 13 or 14, 15, then their scrapers 6 and 7 will work independently of each other, but move at the same speeds, because stars 1 and 2 are common to them.

 Moreover, the segments of the chains 12, 13 (Fig. 3) or 14, 15 (Fig. 4) due to their free placement between kinematically connected elements (7 - 3, 4 or 6 - 7) are practically not stretched. Therefore, the increased load can be reported to the transported cargo due to the fact that the system in this case will be statically determinable and the durable properties of all the traction chains 3, 4 and 5 will be fully used. This will significantly increase the length of the conveyor or the load on the traction circuit. Since the traction chains 3, 4 and 5 are not rigidly interconnected, the transverse stiffness of the chain traction organ is reduced, which facilitates the bending of the stand in the transverse direction when moving the conveyor used as a downhole conveyor, including aggregate.

 At the same time, when the inner traction chain 5 is broken, the conveyor will be able to continue working due to the fact that the load from the inner traction chain 5 through the segments of the chains 12, 13 or 14, 15 will be transferred directly to the outer traction chains 3, 4 (Fig. 3) or through the scrapers 6 (Fig. 4).

 Thus, the distinguishing features of the invention allow to expand the technical capabilities of using the conveyor while reducing its specific indicators for metal consumption and cost while maintaining the level of reliability inherent in a three-chain conveyor with a rigid kinematic connection between all traction chains.

Claims (1)

 A three-chain scraper conveyor, including a traction unit infinitely closed in a vertical plane at the end sprockets and resting on the guides of the rack, containing three kinematically connected parallel traction chains with scrapers fixed to them, which are alternately fixed at their ends on two outer traction chains, and alternating with them, scrapers freely placed with gaps between the outer traction chains are fixed to the inner traction chain with their central part, while the scrapers on the outer traction chains in their middle part are made with a recess for accommodating the inner traction chain, characterized in that it has segments of round link chains, one ends of which are connected to the scrapers fixed to the inner traction chain, and the other ends are connected with external traction chains directly or through scrapers mounted on external traction chains.

Images