Scraper for the development of fluvial gravel deposits

 

The invention relates to a device for transporting bulk and bulk cargoes have been presented, namely to cable scrapers, and can be used for the development of fluvial gravel deposits of diamonds, for example, in Angola. Scraper for the development of fluvial gravel deposits includes side and rear walls, cross ties, trailers with the head and tail traction ropes. At the side of the rope it is equipped with heavier elements, the weight of which is chosen from the condition of longitudinal stability of the scraper relative to the bottom edge of the back wall under the action of the tension of the head rope and the total weight of the scraper. Heavier elements are made in the form of bars mounted on the side walls of the scraper. Heavier elements are made in the form attached to the scraper and oriented in the direction of the head rope brackets with balances. The balances on the brackets mounted for displacement along the brackets and fixing them. Increases the performance and efficiency of the scraper. 3 C.p. f-crystals, 4 Il.

The invention relates to a device for transporting bulk and bulk cargo births diamonds for example, in Angola.

The famous cable car-scraper unit (prototype), including scraper box type, consisting of side and rear walls, cross-linking, towed devices, head and tail ropes (see EN 2181815 C2, 27.04.2002 or Pukhov Y. C. mining operations. M.: Nedra, 1991, S. 110-111, Fig.7.3 d).

However, the disadvantage even though is the inefficiency of its use for the development of fluvial gravel deposits of diamonds during the passage of the scraper bed of the river the greater curvature of the potential of lifting the front of the scraper under the action of the tension of the head rope and the loss of the diamonds.

Objectives of the invention are to increase the efficiency of the scraper installation by eliminating the gap between the scraper from the bed of the river and the loss of the diamonds, as well as increased productivity.

The task is solved according to the invention due to the fact that the scraper for the development of fluvial gravel deposits, including side and rear walls, cross ties, trailers with the head and tail traction ropes from the side of the head rope is equipped with heavier elements, the weight of which is chosen from the condition of longitudinal stability scraper OER.

Heavier items can be made in the form of bars mounted on the side walls of the scraper. Heavier items can be made in the form attached to the scraper and oriented in the direction of the head rope brackets with balances. The balances on the brackets can be mounted for displacement along the brackets and fixing them.

Scraper for the development of fluvial gravel deposits are presented: Fig.1 - the option of heavier elements in the form of bars, side view; Fig.2 - the same, in terms of Fig.3 - the option of heavier elements in the form of brackets balances; Fig.4 - the same, in the plan.

Scraper for the development of fluvial gravel deposits consists of two side walls 1 and 2, connected by a transverse links 3 and rear wall 4. With three-drum winch (not shown) scraper associated main rope 5 and the two tail ropes 6 and 7. The scraper in position relies on a bed 8 river 9. From the main rope 5 scraper equipped with heavier elements. Heavier items can be made in the form of bars 10 and 11 mounted on the side walls 1 and 2 scrapers (Fig.1, 2). Heavier elements can be performed in the 14 and 15 (Fig.3, 4). And counterweights 14, 15 on the brackets 12, 13 can be mounted for displacement along these brackets and fixing them.

The weight of heavier items 10, 11, or 14, 15 is selected from the condition of longitudinal stability of the scraper relative to the bottom edge 16 of the back wall 4 under the action of the tension of the head rope 5 and the total weight G of the scraper.

Other designations:- instantaneous angle of inclination of the bed 8 river 9 to the horizon,- the angle between the direction of the vector T the tension of the head rope 5 and the plane of the bearing scraper (bed 8); 17 - the centre of mass of the scraper.

Scraper for the development of fluvial gravel deposits proceeds as follows. When moving the scraper across the river channel 9 on her box 8 is filled scraper diamondiferous sediments. Begins this process with the opposite side of the winch (not shown) river 9, where the angle of inclinationeven though the maximum horizon. The maximum is also the length of the free span of the head rope 5. As shown by our research, this position of the scraper corresponds to the maximum value of the anglebetween the direction /chr/945.gif">. In this regard, the vector T is the tension of the head rope 5 generates maximum torque (directed clockwise) relative to the lower edge 16 of the rear wall 4 of the scraper. This moment tends to lift the front of the scraper above the bed 8, which is unacceptable, because the scraper in this case will not fill diamondiferous sediments.

Due to the presence of heavier elements - bars 10 and 11 or counterweights 14 and 15, the center of gravity 17 of the scraper is substantially biased towards the head rope 5. Therefore, the total weight G scraper (with weighting elements 10, 11, or 14, 15) is created relative to the edges 16 torque of opposite sign (anti-clockwise). The magnitude of this torque at the recommended choice of weights heavier elements 10, 11, or 14, 15 sufficient to offset the moment created by the tension T of the head rope 5. Therefore, the scraper does not lose the longitudinal stability and is not detached from the bed 8.

Features of the invention allow to increase the efficiency of the scraper installation by eliminating the possibility of disengagement of the scraper from the bed of the river and the loss of the diamonds, as well as by improving the performance installation:center; margin-top:2mm;">Claims

1. Scraper for the development of fluvial gravel deposits, including side and rear walls, cross ties, trailers with the head and tail traction ropes, characterized in that at the side of the rope it is equipped with heavier elements, the weight of which is chosen from the condition of longitudinal stability of the scraper relative to the bottom edge of the back wall under the action of the tension of the head rope and the total weight of the scraper.

2. The scraper under item 1, characterized in that the heavier elements are made in the form of bars mounted on the side walls of the scraper.

3. The scraper under item 1, characterized in that the heavier elements are made in the form attached to the scraper and oriented in the direction of the head rope of the brackets balances.

4. The scraper under item 3, characterized in that the balances on the brackets mounted for displacement along the brackets and fixing them.

 

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