Scraper conveyor

 

(57) Abstract:

The invention relates to mining and transport machines and can be used for delivery of bulk materials on the mountain you are the studies, in particular the delivery of coal to prespectrum furnaces under shield lining. In the scraper conveyor comprising a traction element pivotally attached scrapers, drive reciprocating and suspension system of the conveyor beneath the shield the shield, scrapers are in the form of curved plates with brackets, which they are pivotally attached to the traction element and pivotally interconnected hard thrust. Step t install scrapers on the traction element is larger than the radius R of rotation of the cutting edge of the scraper. Stroke l of the drive reciprocating equal to or greater than an integer time step t install scrapers on the traction element (l = kt, where k = 1,2,3...). Improves the performance of the conveyor. 2 C.p. f-crystals, 3 ill.

The invention relates to mining and transport machines and can be used for delivery of bulk materials in mining, in particular the delivery of coal to prespectrum furnaces under shield lining.

Known scraper conveyor for delivery of coal in the panel bbchami, which is installed in the guide and the roller mounted on the axes of the connecting section of the supporting frame of the conveyor and mounted on a frame of the drive. The disadvantage of this conveyor - low productivity due to the inability to use a large scraper. The size of the scrapers of such a pipeline is limited, cramped conditions panel of the face and size of drive sprocket chain. The increasing size of the scraper requires an increase in the radius of rotation of the chain and thus increasing the radius of the drive sprocket that cannot be performed due to the small width of the face for panel lining.

The closest analogue to the claimed invention is a scraper installation described in the book of M. C. Kurlenya, L. C. Zvorygin Century A. Lebedev. The shield technology development of coal deposits. Novosibirsk: Nauka, 1988, S. 136. The system includes a traction element in the form of a ship chain, a hinge mounted on the traction element drop-down scrapers, winch, which serves as the drive of the reciprocating action, and the suspension system of the conveyor under shield lining. Each scraper is made in the form of two buckets grooved form, attached the earring and rings to the traction element. Under the on disclosure. The transportation of the material in this period, which significantly reduces the portion of floating granular material and the distance of the transportation portion of the cycle, i.e., limits the overall performance. In addition, scraper conveyor disclosed due to the friction of the bulk material independently from each other, which leads to the timing of their disclosure, and sometimes to slippage of individual pigs in unopened form, which significantly reduces the capacity of the conveyor as a whole.

Technical problem - increasing the performance of the scraper conveyor.

This task is solved in that the scraper conveyor comprising a traction element pivotally attached scrapers, drive reciprocating and suspension system of the conveyor beneath the shield the shield, scrapers are in the form of curved plates with brackets, which they are pivotally attached to the traction element and pivotally interconnected rigid thrust: with step t install scrapers on the traction element is larger than the radius R of rotation of the cutting edge of the scraper, and stroke 1 drive reciprocating equal to or greater than an integer time step t installation skreb is which they are pivotally attached to the traction element and pivotally interconnected hard thrust. This design execution nodes scraper conveyor increases the prism drawing of the bulk material and provides disclosure of all scrapers when the engagement of the material to be conveyed at least one scraper that improves the performance of the conveyor;

step t install scrapers on the traction element is equal to or greater than the radius R of rotation of the cutting edge of the scraper, which eliminates at flybacks scrapers they touch the prisms of the drawing, i.e., moving the top of the prisms in the direction opposite to the conveyance, and improves the performance of the conveyor;

stroke l of the drive reciprocating equal to or greater than an integer time step t install scrapers on the traction element, which ensures the lowering of the scraper cutting edges at the base of the prisms of the drawing, and as a consequence, improving the performance of the pipeline.

In Fig. 1 shows the proposed scraper conveyor, the General view when working stroke; Fig. 2 - General view when reverse motion; Fig. 3 is a cross section of the pipeline.

The conveyor includes drive 1 reciprocating made, for example, in the form of cylinders with alternate switching piston cavities, the traction element is et to be made in the form of chain or rope. Scrapers 5 are curved profile shape and rigidly attached to the brackets 3, for example, by welding. The brackets 3 scrapers 5, except for hinged attachment to the traction element 2, the hinge connected between a single rigid beam 6 and the fingers 7. Beam 6 performs the role of traction. The entire makeup of the conveyor by means of the suspension system 8 (Fig. 3) is attached to the panel to overlap so that the scrapers freely rely on the bulk material.

Scraper conveyor operates as follows. In the initial position of the traction element 2 (Fig. 2) is in its rightmost position, the brackets 3 with scrapers 5 are lifted up by turning on the fingers 7 to an extreme position. The extreme position of the scrapers 5 are occupied when a rigid beam 6 and the traction element 2 is pressed over the entire length to each other. Under the force of the actuator 1 starts working stroke traction element 2 with the extreme right position is moved to the leftmost position. In this case, since the brackets 3, the traction element 2, the beam 6 are connected pivotally and scrapers 5 have some mass, then moves the beam 6 relative to the traction element 2, resulting scrapers 5 with brackets 3 are rotated by some angle relative to the fingers 7, omitting renouncement disclosure of all scrapers due to the gearing for the material to be conveyed at least one scraper - the force acting on one scraper, thanks to the hard pull is transmitted to other pigs, and swivel provides smooth rotation of the brackets with scrapers relative to the finger 7. This eliminates slippage and conceal scrapers, which increases the performance of pipeline per cycle in comparison with the prototype. Further movement of the traction element 2 to the left leads to a further lowering of the scraper cutting edges 5 and their implementation in the transported bulk material. Full disclosure scrapers. As the distance between the fingers 4 and 7 is much less than the distance from the cutting edge of the scraper to the finger 7, the arc of the trajectory of movement of the fingers 4 together with the traction element 2 is also less than the length of the arc of rotation of the cutting edge of the scraper 5. This ratio provides disclosure scrapers with a relatively small movement of the traction element 2, respectively, the remaining large part of the stroke l of the drive is spent on useful moving bulk material. This design provides a dramatic reduction of time for disclosure of scrapers, which allows to reduce the stroke length l of the reciprocating actuator and to increase the number of cycles per unit in the further movement to the left move before a granular material, forming a prism drawing before each scraper. Moving scrapers portions of the bulk material occurs before the end of the stroke l of the drive, and extreme scraper passes over the stove or receiving portion of any bunker, bulking it transported material. Curved profile scrapers 5 due to bending increases the volume of a prism drawing, in comparison with a straight scraper, that also increases the roaming portion of the bulk material, and therefore, the performance for the cycle.

After unloading the leftmost scraper moves the traction element 2 in the reverse direction (to the right), and in the initial period of the reverse l moves the traction element 2 relative to the beams 6 and the rotation of the scraper relative to the finger 7 with the rise of the cutting edge. Scrapers 5, making complex movement (moving horizontally to the right and simultaneously lift), free of loose material. Prism drawing after the liberation of the scraper showered, forming a slope from the side of the scraper is equal to the angle of repose of the bulk material, which for bulk materials such as ore, coal 30-45o. Upon further movement of the traction Lamego beam 6. The conveyor is raised scrapers 5 under the action of the actuator is moved to the right for the remainder of the stroke l of the drive. After reaching the rightmost position of the traction element 2, the cycle repeats. As the unloading of bulk material from under the conveyor, the entire structure of the conveyor suspension system 8 is lowered to the bulk material, ensuring complete filling of bulk material scrapers when working stroke.

The angle of the cutting edges of the scrapers 5 are selected in such a way as to reverse the course of the scrapers are not concerned collapsed prisms drawn and there was at least a partial reverse movement of the bulk material. This is possible if step t install scrapers on the traction element 2 more radius R of rotation of the cutting edges of the scrapers. When installing scraper with a radius smaller than the radius R of rotation, the scrapers will be in the reverse course to catch a prism drawing and move them to the upper part in the direction opposite the transport. The portion of the bulk material transported per cycle will decrease, reducing the performance of the pipeline.

The length of the base B collapsed prism drawing (fully loaded scrapers bulk material) is equal to twice the UP>).

B = 2h/[tg(30-45)].

The step size t install scrapers must be equal to the base length B collapsed prism or to be more (t = B). Otherwise, the cutting edge of the scraper after lowering when working course will not be placed at the base of the prisms and upon further movement of the loose part will remain in place, thereby reducing the portion of the transported each scraper, which also reduces performance.

Stroke l of the actuator is chosen so that over the receiving portion opesuse furnace or hopper will be discharged one or more scrapers, and the stroke l of the drive must be equal or greater in integer time step t install scrapers on the traction element (l = kt, where k= 1, 2, 3.. .). When choosing the ratio between l and k is not equal to the whole number of cutting edges scrapers 5 will not go down at the base of the collapsed prisms lugs and the portions are roaming loose will be less, which will reduce the performance of the pipeline.

The proposed design can make unloading coal at the two flanking opesuse furnace, for this half of the scrapers must be set against stroke (scrapers rotated around the vertical axis by 180 degrees. ), have a look at Govou oven, that also increases the performance for the cycle.

Thus, the proposed technical solution in comparison with the prototype improves performance per cycle and per unit of time in 2-3 times.

1. Scraper conveyor comprising a traction element pivotally attached scrapers, drive reciprocating and suspension system of the conveyor beneath the shield the shield, wherein the scrapers are made in the form of curved plates with brackets, which they are articulated to the traction element and pivotally interconnected hard thrust.

2. The pipeline under item 1, characterized in that the step t install scrapers on the traction element is larger than the radius R of rotation of the cutting edge of the scraper.

3. The pipeline under item 1, characterized in that the stroke l of the actuator is equal to or greater than an integer time step t install scrapers on the traction element l = kt, where k = 1,2,3....

 

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