Drag scraper machine

FIELD: construction.

SUBSTANCE: machine comprises a scraper of box type (1), a scraper hoist (2), head (3) and tail (4) traction ropes, diverting blocks (5) for traction ropes, a loading ramp (6). The scraper comprises side walls (7) and a rear wall (8), in its lower part inclined at the angle to the horizon. On the rear inclined wall of the scraper at the angle (10) of fixation of a tail traction rope to the scraper on brackets (11, 12) fixed on the walls a shaft (14) of cylindrical shape is installed with the possibility of rotation on the horizontal axis (13), and its lower edge is arranged with displacement downwards relatively to the lower edge of the rear wall of the scraper and is distanced from it along the horizontal line towards the tail traction rope. Brackets on the rear wall are fixed with the help of a board (15) with the possibility of its displacement in the vertical plane along the wall and fixation on it with the help of fastening elements (16). The shaft axis is installed in horizontally aligned slots (17) of brackets with the possibility of their displacement and fixation.

EFFECT: decreased energy intensity and wear of a device.

3 dwg

 

The invention relates to transport machines of periodic action, namely the scraper settings, mainly with the box scraper type, and can be used for transportation of ore from the faces in underground mining and stacking warehouses surface complexes coal mines.

Famous adopted for the prototype cable-scraper installation comprising a scraper box type, scraper winch, head and tail traction ropes, deflecting blocks for ropes and unloading shelves (Tarasov UD, Nikolaev, A. Mining machine of periodic action. SPb., Transport (TU), 2005, p.6-9, figure 2, 3A).

However, it is widely used in mining cable scraper apparatus have disadvantages such as high energy transportation of bulk cargo and intensive abrasive and fatigue wear of the scraper in the interaction of their lower edges with soil excavation and handling regiment.

The technical result of the invention is to reduce the energy intensity of the transportation of bulk cargo and reducing wear of the scraper by reducing the resistance to movement of the scraper when working and idle strokes.

The technical result is achieved by the fact that the scraper installation containing scraper amicin the type, scraper winch, head and tail traction ropes, deflecting blocks for ropes and unloading shelves, the rear inclined wall scraper under the attachment to the scraper tail traction rope fixed on the wall bracket is mounted for rotation on a horizontal axis, a roll of cylindrical shape, the lower edge of which is offset downward relative to the lower edge of the rear wall of the scraper and removed from it horizontally towards the tail of the traction rope, with the brackets on the rear wall of the scraper is fixed with a plate with the possibility of its displacement in the vertical plane and fixing with the fixing elements and the axis of the roll housed in a horizontally oriented slots of the brackets with the possibility of displacement and fixation of the axis.

The scraper installation is presented in figure 1, a side view, figure 2 is the side view of the scraper in the zone load, figure 3 is a view of the figure 2.

The scraper includes (1) box scraper type 1 scraper winch 2, head 3 and the tail 4 of the traction ropes, deflecting units 5 for traction rope, unloading shelves 6. This winch 2 can be double-drum or three-drum with one head and two tail ropes or two head and one tail rope. The scraper 1 is (f is Data2, 3) of the side wall 7 and rear wall 8, in its lower portion inclined at an angle α (the angle of introduction) to the horizon. The scraper 1 with traction ropes 3 and 4 is connected to the corresponding nodes 9 and 10. On the rear inclined wall 8 of the scraper under the node 10 of the attachment to the scraper tail pulling rope 4 mounted on the wall 8 of the brackets 11 and 12 is mounted for rotation on a horizontal axis 13 of the roller 14 has a cylindrical shape, the lower edge of which is located at offset h down relative to the lower edge of the rear wall 8 of the scraper and removed from it horizontally in the direction of the tail pulling rope 4 on the value ofand. While the brackets 11 and 12 on the rear wall 8 is fixed with a plate 15 with the possibility of its displacement in the vertical plane along the wall 8 and fixing it by means of fixing elements 16, and the axis 13 of the roll 14 is placed in a horizontally oriented slots 17 of the brackets 11 and 12 with the possibility of displacement and fixation axis 13. The parameters h,andaccepted depending on the geometric dimensions of the scraper and physico-mechanical properties of the transported goods and are determined experimentally or by testing of the prototype scraper while minimizing parameter h.

18 - bearing surface generation, 19 - subject to transportation of cargo in the loading area scrapers 20 - transported cargo, the var is returned by the scraper 1 during its working stroke, 21 - the direction of movement of loaded scrapers 1.

Technical solution can also be used for cable-scraper installations with scrapers Grabovogo type.

The scraper installation operates as follows. When you enable scraper winch 2 empty scraper 1, moving in the direction of 21 with the head of the traction rope 3 is filled located in the loading area lump cargo 19. By appropriate location of the rink 14 (parameters h andand) relative to the implement in the weight of the loaded cargo 19 of the lower edge of the rear wall 8 of the scraping force implementation is practically not reduced as compared with the calculated (parameter - the weight of the scraper, so as compactor 14 is beyond loaded in a scraper of the transported goods. After loading scraper 1 during its working stroke (Fig 1) its total resistance is determined by the force of friction of the movable scraper 1 cargo 20 weight G of soil production 18 when the coefficient of friction f and the rolling friction of the scraper weight G0when the ratio of the resistance movement w. At idle even though the 1 in the reverse direction after his release from the load 20 at the discharge shelf 6 resistance to movement of the scraper 1 is not determined when the coefficient of friction f0even though 1 of soil production 18 (what is characteristic is for the prototype), and when the weighted average value of the coefficient of resistance to the motion w as when working course loaded scraper 1, and the coefficient of friction f0taking into account the location of the center of gravity of the scraper 1 offset towards the rear wall 8.

When the ratio of the weight of the scraper and weight roaming of G0/G=0,5 (normative factor of 0.4-0.6), the coefficients of friction f and f0cargo and the scraping of soil production, respectively, equal to 0.7 and 0.5, and the coefficient of resistance to movement of the scraper in the direction of its bearing on the rink w=0.05 reduction in the energy intensity of transportation when working stroke will account for 23.7%and at idle - at least 50-60%. At the same baselines wear Foundation scraper will also decrease by 50-60%.

Thus, features of the invention can significantly reduce the energy intensity of the transportation of bulk cargo and wear scraping by reducing the resistance to movement of the scraper when working and idle strokes.

The scraper installation comprising a scraper box type, scraper winch, head and tail traction ropes, deflecting blocks for ropes and unloading shelves, characterized in that the rear inclined wall scraper under the attachment to the scraper tail traction rope fixed on this article is the NCA brackets is mounted for rotation on a horizontal axis, a roll of cylindrical shape, the lower edge of which is offset downward relative to the lower edge of the rear wall of the scraper and removed from it horizontally towards the tail of the traction rope, with the brackets on the rear wall of the scraper is fixed with a plate with the possibility of its displacement in the vertical plane and fixing with the fixing elements and the axis of the roll is placed in a horizontally oriented slots of the brackets with the possibility of displacement and fixation axis.



 

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