Long-load-distance multi-stage driving scraper conveyor

Abstract

The invention belongs to the technical field of belt conveyors, and provides a long-conveying-distance multi-stage driving scraper conveyor which comprises a chain, a scraper, a first driving mechanism, a second driving mechanism and a middle auxiliary driving mechanism. A plurality of auxiliary driving mechanisms for directly driving the scraping plate are arranged between the first driving mechanism and the second driving mechanism at the two ends and matched with the first driving mechanism and the second driving mechanism for indirectly driving the scraping plate through chains on the two sides, multi-stage cooperative driving of the scraping plate is achieved, and the conveying distance of conveying equipment is prolonged; each auxiliary driving mechanism comprises three (or more) mutually parallel rotating shafts, and each rotating shaft is provided with a special-shaped gear with special-shaped teeth arranged in the circumferential direction; deviation angles are sequentially preset for the special-shaped gears on the adjacent rotating shafts in the conveying direction, the special-shaped gears of the rotating shafts alternately drive the scraper, and the problems that a chain is prone to disengagement, insufficient in driving force, large in shaking and the like when directly driven by an existing middle driving mechanism are solved. Through holes allowing the special-shaped teeth to penetrate through and a special-shaped gear cover preventing materials from leaking are arranged on a bottom plate of the scraper groove.

Description

Technical Field

[0001] The present invention belongs to the technical field of belt conveyors, and particularly relates to a long-distance multi-stage drive scraper conveyor. Background Technique

[0002] The statements in this part merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the expansion of the scale of mineral mining, especially in large-scale mining of coal, non-ferrous metal minerals, etc., since long-distance scraper conveyors can not only adapt to longer mining working faces, reduce the volume, weight and maintenance costs of equipment, save energy, but also increase the cutting area of shearers at both ends of the fully mechanized mining face, avoid resource waste and improve production efficiency, the demand for long-distance scraper conveyors is gradually increasing.

[0004] Conventional scraper conveyors generally adopt a double-motor drive mode at the head and tail. However, due to the space limitation of the mining working face, the volume of the drive motor and reducer cannot be too large. And during long-distance operation, factors such as the self-weight and friction of the chain and scraper lead to a large chain tension, and problems such as chain breakage, slipping and wear often occur. Although the conveying distance of the scraper conveyor can be increased by directly adding an auxiliary drive mechanism, for example, adding an auxiliary drive sprocket in the middle of the scraper and directly driving the chain by means of the sprocket, this drive mode not only has high requirements for the meshing of the chain and sprocket, but also the meshing of the sprocket and chain is unstable, and the chain and sprocket are prone to disengagement and slipping under large loads, and the vibration and wear are aggravated, affecting the conveying efficiency. Summary of the Invention

[0005] To solve the above problems, the present invention proposes a long-distance multi-stage driven scraper conveyor. By providing auxiliary drive mechanisms acting on the scrapers on multiple segmented scraper troughs between the first drive mechanism and the second drive mechanism, in cooperation with the first and second drive mechanisms acting on the chains at both ends, cross multi-stage drive is achieved together, extending the conveying distance of the conveying equipment. On this basis, each auxiliary drive mechanism includes three (or more) parallel rotating shafts, with special-shaped gears provided on each rotating shaft. Each special-shaped gear has three special-shaped teeth in the circumferential direction, and the head of the special-shaped tooth is cylindrical. The scraper is provided with an arc-shaped portion that can allow engagement with the head of the special-shaped tooth, and auxiliary drive is achieved through the engagement of the head of the special-shaped tooth with the arc-shaped portion of the scraper, avoiding problems such as unstable engagement between the chain and the sprocket, easy detachment under large loads, and increased vibration when the previously provided middle auxiliary drive mechanism directly drives the chain. At the same time, the angles of the special-shaped teeth of the special-shaped gears on adjacent rotating shafts are set according to a preset deviation angle, and the special-shaped gears at different positions alternately drive the scraper, ensuring the continuity of the drive and reducing noise and jitter during discontinuous drive. To prevent the conveyed material from leaking out, a special-shaped gear cover is provided to cooperate with the special-shaped gear. According to some embodiments, the present invention provides a long-distance multi-stage driven scraper conveyor, adopting the following technical solutions:

[0006] A long-distance multi-stage driven scraper conveyor, comprising a chain, a first drive mechanism and a second drive mechanism provided at both ends of the chain, and a plurality of scrapers provided on the chain;

[0007] A plurality of auxiliary drive mechanisms are provided between the first drive mechanism and the second drive mechanism. Each auxiliary drive mechanism includes three (or more) parallel rotating shafts, and a special-shaped gear is provided on each rotating shaft; the special-shaped gear has three (or more) special-shaped teeth in the circumferential direction, and the head of the special-shaped tooth is cylindrical; the scraper has an arc-shaped portion for engaging with the special-shaped tooth, and the angles of the special-shaped teeth of the special-shaped gears on adjacent rotating shafts are set according to a preset deviation angle.

[0008] Further, the first drive mechanism includes a first drive source. A rotating shaft is provided on the output shaft of the first drive source, and two first sprockets are provided on the rotating shaft, arranged on both sides. A chain is provided on each first sprocket. The two ends of the two chains are respectively engaged with the corresponding first sprocket and second sprocket.

[0009] Further, the second drive mechanism includes a second drive source. A rotating shaft is provided on the output shaft of the second drive source, and two second sprockets are provided on the rotating shaft, arranged on both sides. A chain is provided on each second sprocket; the two ends of the two chains are respectively engaged with the corresponding first sprocket and second sprocket.

[0010] Further, the auxiliary driving mechanism includes an auxiliary driving source. The output shaft of the auxiliary driving source is connected with a speed reducer. The output shaft of the speed reducer is connected with two driving sprockets through a clutch. The first driven rotating shaft and the second driven rotating shaft adjacent to the two driving sprockets front and back are respectively provided with a coplanar first driven sprocket and a second driven sprocket. The first driven sprocket and the second driven sprocket are respectively connected with the corresponding coplanar driving sprockets through a ring chain. The driving sprockets, the first driven sprocket and the second driven sprocket are respectively connected to an intermediate rotating shaft, a first driven rotating shaft and a second driven rotating shaft. Two special-shaped gears are arranged on the intermediate rotating shaft, the first driven rotating shaft and the second driven rotating shaft.

[0011] Further, the first driving source, the second driving source and the auxiliary driving source are all permanent magnet motors, and the clutch is an electromagnetic clutch; the disconnection of the fault auxiliary driving mechanism can be realized, and the starting mode of sectional starting of the scraper conveyor can also be realized in cooperation.

[0012] Further, the two special-shaped gears on the intermediate rotating shaft, the two special-shaped gears on the first driven rotating shaft and the two special-shaped gears on the second driven rotating shaft are arranged at the same angle on the same axis, and are sequentially offset by 40° in the driving direction on different axes, and the special-shaped gears are arranged in a crosswise manner inside and outside; the size of the offset angle is related to the number of teeth of the special-shaped teeth, the number of transmission shafts and the driving mode.

[0013] Further, the scraper is of an inverted L-shaped structure, including a vertical plate, a horizontal plate perpendicular to the vertical plate, and an arc portion arranged at the connection of the vertical plate and the horizontal plate.

[0014] Further, the arc portion of the baffle is engaged and matched with the head of the special-shaped tooth on the special-shaped gear.

[0015] Further, the special-shaped gear cover is adapted to the through hole where the special-shaped gear on the bottom plate of the scraper trough extends, so as to prevent the leakage of the conveyed material when the special-shaped tooth normally extends for driving.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention realizes cross multi-stage drive by arranging a plurality of auxiliary drive mechanisms acting on the scraper between the first drive mechanism and the second drive mechanism, and cooperates with the first and second drive mechanisms acting on the chain at both ends to jointly extend the transportation distance of the conveying equipment; on this basis, each auxiliary drive mechanism includes a plurality of parallel rotating shafts, and each rotating shaft is provided with a special-shaped gear. The circumferential direction of the special-shaped gear has a plurality of special-shaped teeth, and the head of the special-shaped tooth is round; the scraper has an arc-shaped part to mesh with the head of the special-shaped tooth, avoiding problems such as insufficient driving force and easy detachment when the middle auxiliary drive mechanism directly drives the chain in the past due to low meshing degree and instability between the chain and the sprocket. At the same time, the angles of the special-shaped teeth of the special-shaped gears on adjacent rotating shafts are set according to a preset deviation angle, and the special-shaped gears at different positions alternately drive the scraper, ensuring the continuity of driving, reducing noise and jitter; a special-shaped gear cover is arranged under the bottom plate of the scraper groove to cooperate with the special-shaped gear to prevent the conveyed material from leaking out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments and descriptions thereof of this embodiment are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0019] Figure 1 Schematic structural diagram of the scraper conveyor according to Embodiment 1 of the present invention;

[0020] Figure 2 Axonometric view of the scraper conveyor according to Embodiment 1 of the present invention;

[0021] Figure 3 Schematic structural diagram of the auxiliary drive mechanism according to Embodiment 1 of the present invention;

[0022] Figure 4 Layout diagram of the rotating shafts according to Embodiment 1 of the present invention;

[0023] Figure 5 Layout diagram of the special-shaped gears according to Embodiment 1 of the present invention;

[0024] Figure 6 Schematic structural diagram of the baffle according to Embodiment 1 of the present invention;

[0025] Figure 7 Schematic diagram of the special-shaped gear and the special-shaped gear cover according to Embodiment 1 of the present invention;

[0026] Among them, 1. Chain; 2. Scraper; 21. Through hole; 22. Baffle; 2201. Vertical plate; 2202. Horizontal plate; 2203. Arc part; 3. First driving mechanism; 31. First driving source; 32. First sprocket; 4. Second driving mechanism; 41. Second driving source; 42. Second sprocket; 5. Auxiliary driving mechanism; 51. Auxiliary driving source; 52. Reducer; 53. Clutch; 54. Driving sprocket; 55. First driven sprocket; 56. Second driven sprocket; 57. Intermediate rotating shaft; 58. First secondary rotating shaft; 59. Second secondary rotating shaft; 510. Special-shaped gear; 5101. Special-shaped tooth; 5102. Special-shaped tooth head; 511. Bearing; 6. Bottom plate; 7. Side plate; 8. Bottom plate of scraper groove; 9. Special-shaped gear cover. Detailed implementation mode

[0027] The present invention will be further described below in conjunction with the drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further descriptions of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes according to the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present invention and do not specifically refer to any component or element of the present invention. It should not be construed as a limitation to the present invention.

[0031] In the present invention, terms such as "fixed connection", "connected", "connected" should be understood in a broad sense, indicating that it can be a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances and should not be construed as a limitation to the present invention.

[0032] Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0033] Embodiment 1

[0034] Scraper conveyor is a kind of widely used in mining, metallurgy, building materials and other industries, especially in scenes where continuous and stable material transportation is required, and it is mainly used for horizontal or inclined transportation of bulk materials. In particular, it is widely used in coal mining and tunnel transportation in coal mining. Compared with other modes of transportation, scraper conveyor can be applied to different types of materials, including granular, powdery and block materials; scraper conveyor can perform continuous conveying operations, improve production efficiency and reduce labor costs; scraper conveyor has a simple structure, few parts, and daily maintenance and overhaul are relatively convenient; scraper conveyor has good stability and can work stably for a long time, which is particularly suitable for large-scale production environments that require continuous transportation; scraper conveyor can work stably in some harsh environments (such as high temperature and humid environment), and is widely used in coal mines, power plants and other industries.

[0035] With the expansion of the scale of mineral mining, especially in large-scale mining of coal, non-ferrous metal minerals, the demand for long-distance scraper conveyors is gradually increasing because long-distance scraper conveyors can not only adapt to longer mining faces, reduce equipment size, weight and maintenance costs, save energy, but also expand the coal mining machine cutting area at both ends of the comprehensive mining face, avoid resource waste, and improve production efficiency. Conventional scraper conveyors generally adopt the head and tail dual motor drive mode. When running over long distances, they are limited by the size of the drive motor and reducer, the weight of the chain and scraper, and the chain accumulates tension due to friction and gravity, resulting in excessive chain tension, motor driving force attenuation with increasing distance, and the tail chain is prone to "chain stacking", slipping, chain breaking, etc. due to insufficient tension. As a result, the maximum conveying distance of a single machine is usually 200-400 meters, and a few heavy-duty models can reach 500 meters, which brings huge production and maintenance costs to mineral resource mining companies.

[0036] In order to solve the above problems, Figure 1 and Figure 2 As shown, the first embodiment of the present invention introduces a long-distance multi-stage driven scraper conveyor, including a chain 1, a scraper 2, a first drive mechanism 3, a second drive mechanism 4, an auxiliary drive mechanism 5, a bottom plate 6 and a side plate 7, a scraper groove bottom plate 8 and a special-shaped gear cover 9, etc.

[0037] One of the purposes of this embodiment is to solve the long-distance transportation of scraper conveyors; the existing scraper conveying technology is limited by the volume of the equipment drive motor and reducer, the heavy weight of the chain and scraper, etc., resulting in limited mining working surface, difficult maintenance, short transportation distance, high energy consumption, large waste of resources, low production efficiency, etc. Based on this, the scraper conveyor provided in this embodiment has the advantages of small size and high efficiency of the permanent magnet motor, light weight of the chain and scraper chain, large mining working surface, low equipment cost, easy maintenance, and high fault tolerance.

[0038] As Figure 1 and Figure 2 shown, two side plates 7 are vertically arranged on the bottom plate 6; the first driving mechanism 3 and the second driving mechanism 4 are respectively arranged at both ends of the side plate 7; a chain 1 is arranged between the first driving mechanism 3 and the second driving mechanism 4, and a plurality of scraping plates 2 are arranged on the chain 1.

[0039] The first driving mechanism 3 includes a first driving source 31 arranged on the bottom plate 6 and a first sprocket 32 arranged on the first driving source 31; optionally, the first driving source 31 is a motor, a rotating shaft is arranged on the output shaft of the first driving source 31, and two first sprockets 32 are arranged on the rotating shaft, arranged on both sides, and both ends of the two chains are respectively meshed with the corresponding first sprocket 32 and second sprocket 42, ensuring the running stability of the scraping plate.

[0040] The second driving mechanism 4 includes a second driving source 41 arranged on the bottom plate 6 and a second sprocket 42 arranged on the second driving source 41; optionally, the second driving source 41 is a motor, a rotating shaft is arranged on the output shaft of the second driving source 41, and two second sprockets 42 are arranged on the rotating shaft, respectively arranged on both sides at both ends of the scraping plate 2, and a chain 1 is arranged on each second sprocket 42, ensuring the running stability of the scraping plate; both ends of the two chains are respectively meshed with the corresponding first sprocket 32 and second sprocket 42.

[0041] During operation, the first driving source 31 rotates, driving the first sprocket 32 to rotate, thereby driving the chain 1 and the scraping plate 2 to move; at the same time, the second driving source 41 rotates synchronously with the first driving source 31, driving the second sprocket 42 to rotate, thereby driving the chain 1 and the scraping plate 2 to move.

[0042] In some embodiments, the first driving source 31 and the second driving source 41 are optionally permanent magnet synchronous motors.

[0043] As Figure 2 and Figure 3As shown, an auxiliary driving mechanism 5 acting on the scraper 2 is arranged on the multiple scraper groove segments between the first driving mechanism 3 and the second driving mechanism 4, and cooperates with the first driving mechanism 3 and the second driving mechanism 4 acting on the chain at both ends to jointly realize cross multi-stage drive and extend the transportation distance of the conveying equipment. Each of the auxiliary driving mechanisms 5 includes an auxiliary driving source 51 arranged on the base plate 6, and the auxiliary driving source 51 can be set as a motor. The output shaft of the auxiliary driving source 51 is connected to a reducer 52, and the output shaft of the reducer 52 is connected to a driving sprocket 54 through a clutch 53; there are two driving sprockets 54, and a first driven sprocket 55 and a second driven sprocket 56 are respectively arranged in front and behind the driving sprocket 54; the first driven sprocket 55 and the second driven sprocket 56 are respectively connected to the driving sprocket 54 through circular ring links. The driving sprocket 54, the first driven sprocket 55 and the second driven sprocket 56 are respectively mounted on three transmission shafts, and the driving sprocket 54, the first driven sprocket 55 and the second driven sprocket 56 are respectively connected with an intermediate rotating shaft 57, a first slave rotating shaft 58 and a second slave rotating shaft 59, and both ends of the intermediate rotating shaft 57, the first slave rotating shaft 58 and the second slave rotating shaft 59 are rotatably arranged on the side plate 7 through bearings 511. Two special-shaped gears 510 are arranged on the intermediate rotating shaft 57, the first slave rotating shaft 58 and the second slave rotating shaft 59.

[0044] In some embodiments, the auxiliary drive source 51 may be a permanent magnet synchronous motor, the reducer 52 may be a helical gear reducer, the clutch 53 may be an electromagnetic clutch, the bearing 511 may be a deep groove ball bearing, and the end cover of the bearing 511 may be fixed on the side plate 7. The clutch 53 may connect and disconnect the drive to the scraper 2 according to the working state of the permanent magnet motor, thereby avoiding the influence of the faulty motor on the normal shift production time of the long-distance scraper conveyor and improving the fault tolerance of the scraper conveyor.

[0045] When working, the auxiliary driving source 51 drives the driving sprocket 54 and the intermediate rotating shaft 57 to rotate through the reducer 52 and the clutch 53. At the same time, the driving sprocket 54 drives the first driven sprocket 55 and the second driven sprocket 56 to rotate through chain transmission, thereby driving the first slave rotating shaft 58 and the second slave rotating shaft 59 to rotate. The intermediate rotating shaft 57, the first slave rotating shaft 58 and the second slave rotating shaft 59 rotate, and the scraper 2 is acted on by the special-shaped gear 510 to achieve auxiliary driving. The special-shaped gear 510 acts on the scraper 2 to avoid the problem of increased vibration and discontinuous driving caused by the low meshing degree between the chain 1 and the sprocket when the chain 1 is directly driven.

[0046] In some embodiments, the two special-shaped gears 510 on the intermediate rotating shaft 57, the two special-shaped gears 510 on the first secondary rotating shaft 58, and the two special-shaped gears 510 on the second secondary rotating shaft 59 are distributed in an inner-outer cross pattern, ensuring the driving stability of the scraper conveyor in terms of width.

[0047] Optionally, the meshing angle of each tooth of the special-shaped gear 510 is 40° (the actual meshing angle can be set between 40° and 50° to ensure smooth and alternating scraper driving). The special-shaped gears 510 installed on the intermediate rotating shaft 57, the first secondary rotating shaft 58, and the second secondary rotating shaft 59 are set with a 40° deviation angle. This angle deviation ensures that the auxiliary driving mechanism 5 drives smoothly. Specifically, the special-shaped gear 510 is a three-tooth special-shaped gear with a tooth pitch angle of 120°. The special-shaped gear 510 on the intermediate rotating shaft 57 has a 40° deviation from the special-shaped gear 510 on the first secondary rotating shaft 58, and the special-shaped gear 510 on the intermediate rotating shaft 57 has a 40° deviation from the special-shaped gear 510 on the second secondary rotating shaft 59; the angles of the three groups of special-shaped gears 510 deviate by 40° in sequence according to the driving direction, enabling the groups of special-shaped gears 510 on the three shafts to drive alternately. The advantages are continuous transmission, reduced noise and vibration, and extended service life.

[0048] The distances between the intermediate rotating shaft 57, the first secondary rotating shaft 58, and the second secondary rotating shaft 59, as well as the scraper spacing, are determined by the number of teeth of the above-mentioned angle-deviated special-shaped gears 510 and the number of transmission shafts. The scraper spacing is 3P (3 times the tooth pitch, where P is the tooth pitch of the special-shaped gear); the distance between the intermediate rotating shaft 57 and the first secondary rotating shaft 58 is 4P (4 times the tooth pitch), and the distance between the intermediate rotating shaft 57 and the second secondary rotating shaft 59 is 5P (5 times the tooth pitch). The assembly positions of the three groups of special-shaped gears 510 on the shaft are also different, and the three groups of special-shaped gears are arranged in an inner-outer staggered pattern, which can effectively reduce the frequent wear of the scraper driving special-shaped gear on the same position of the scraper during the transmission process and increase its service life, as Figure 4 shown.

[0049] The realization of a long conveying distance is achieved by installing multiple auxiliary driving mechanisms 5. In the transmission unit with three shafts and three teeth, the distance between each auxiliary driving mechanism 5 is an integer multiple of the scraper spacing (3P).

[0050] The bottom plate 8 of the scraper chute is arranged below the scraper 2. The bottom plate 8 of the scraper chute is horizontally fixed on the two vertical side plates 7 of the scraper conveyor, forming the main structure of each segmented scraper chute (each auxiliary drive mechanism 5 is installed at the corresponding position). Each section of the scraper chute is connected by the dumbbell pins of the traditional scraper conveyor. An abnormal gear cover 9 is arranged outside the abnormal gear 510; optionally, the abnormal gear cover 9 is fixed on the lower surface of the bottom plate 8 of the scraper chute. The intermediate rotating shaft 57, the first secondary rotating shaft 58 and the second secondary rotating shaft 59 are respectively rotationally connected to the corresponding abnormal gear cover 9 through components such as bearings. The abnormal gear 510 can rotate within the abnormal gear cover 9. An opening is provided on the upper side of the abnormal gear cover 9, and the opening is adapted to the through hole 21 on the bottom plate 8 of the scraper chute.

[0051] As Figure 5 and Figure 6 shown, there are three abnormal teeth 5101 on the circumference of the abnormal gear 510, and an abnormal tooth head 5102 is arranged on the abnormal tooth 5101; as Figure 7 shown, through holes 21 that can allow the abnormal teeth 5101 and the abnormal tooth heads 5102 to penetrate are arranged on the bottom plate 8 of the scraper chute. The abnormal teeth 5101 of the abnormal gears 510 on the intermediate rotating shaft 57, the first secondary rotating shaft 58 and the second secondary rotating shaft 59 are arranged at a preset deviation angle, so that the abnormal gears 510 at different positions alternately drive the scraper 2, ensuring the continuity of driving and reducing noise and jitter. The abnormal gear 510, the abnormal tooth 5101 and the abnormal tooth head 5102 are optionally a part integrally cast or machined. As Figure 7 shown, the abnormal gear cover 9 only has an upper opening and round holes on the side for the rotating shaft to pass through, and the opening is adapted to the part of the abnormal gear 510 protruding from the through hole 21 on the bottom plate 8 of the scraper chute, which can prevent the leakage of the conveyed material when the abnormal tooth 5101 normally extends for driving.

[0052] In some embodiments, a baffle 22 is arranged on the scraper 2. The baffle 22 includes a vertical plate 2201, a horizontal plate 2202 perpendicular to the vertical plate 2201, and an arc portion 2203 arranged at the connection of the vertical plate 2201 and the horizontal plate 2202. During operation, after the abnormal tooth head 5102 passes through the through hole 21, it contacts the arc portion 2203, and the arc portion 2203 is adapted to the abnormal tooth head 5102, ensuring the stability of the auxiliary drive.

[0053] In this embodiment, the multi-point distributed drive adopted by the multi-stage permanent magnet motor drive mode not only eliminates the problems of large volume of drive motors and reducers, heavy self-weight of chains and scrapers, difficult maintenance, short conveying distance, high energy consumption, etc. caused by the front and rear two-stage drives of traditional long-distance heavy scraper conveyors, but also increases the cutting area at both ends of the mining face, reduces the waste of mineral resources, and improves the production efficiency.

[0054] Compared with the single conveying mode of using a chain to drive the scraper in the traditional scraper conveyor, a combined drive mode of using a chain to drive the scraper at both ends and a special-shaped gear to drive the scraper in the middle is creatively proposed, and the special-shaped gear for scraper drive in the scraper drive unit is designed specifically to ensure the normal and stable operation of the scraper drive system. And a transmission unit with three axes and three teeth is taken as an example for detailed description.

[0055] The permanent magnet synchronous motor directly drives the sprocket of the scraper conveyor, avoiding the mechanical loss of gear transmission in the reduction box, significantly improving the comprehensive efficiency of the system, and being more energy-efficient than the traditional asynchronous motor.

[0056] Based on the uniquely designed three-axis linkage drive unit (including the drive shaft, 2 driven shafts, clutch, etc.), a multi-stage drive mode for driving the scraper is proposed, which not only ensures the stable drive of each middle section of the scraper conveyor, can arbitrarily increase or decrease the linkage drive units according to the needs of the working face, but also the adopted clutch can connect and disconnect the driving force according to the working state of the permanent magnet motor, avoiding the influence of a faulty motor on the normal shift production time of the long-distance scraper conveyor.

[0057] In this embodiment, the distance between each shaft inside the three-axis linkage drive unit, the distance between scrapers, and the deflection angle of the special-shaped gears of the other two groups of the same transmission unit need to be determined according to the number of teeth of the special-shaped teeth, the driving angle of each tooth, and the number of transmission shafts.

[0058] A working method or principle of the scraper conveyor in this embodiment is as follows:

[0059] Start the first drive source 31, the second drive source 41 and start multiple auxiliary drive sources 51; the first drive source 31 and the second drive source 41 respectively drive the first sprocket 32 and the second sprocket 42 to rotate; the first sprocket 32 and the second sprocket 42 jointly drive the chain 1 to rotate. The rotational speed and direction provided by the first drive source 31 and the second drive source 41 to the chain 1 are equal.

[0060] The chain 1 drives the scraper 2 to move. The auxiliary drive source 51 drives the driving sprocket 54 to rotate through the speed reducer 52. Correspondingly, the clutch 53 is closed, and the driving sprocket 54 drives the first driven sprocket 55 and the second driven sprocket 56 to rotate through the chain. The driving sprocket 54, the first driven sprocket 55 and the second driven sprocket 56 rotate to drive the intermediate rotating shaft 57, the first secondary rotating shaft 58 and the second secondary rotating shaft 59 to rotate respectively.

[0061] During the rotation of the intermediate rotating shaft 57, the first secondary rotating shaft 58 and the second secondary rotating shaft 59, the special-shaped gear 510 assists in driving the scraper 2, and finally realizes the multi-stage cooperative driving of the chain 1 and the special-shaped gear 510 on the scraper 2.

[0062] The above are only the preferred embodiments of this embodiment and are not used to limit this embodiment. For those skilled in the art, this embodiment can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this embodiment shall be included within the protection scope of this embodiment.

Claims

1. A long-distance multi-stage driven scraper conveyor, characterized in that, It includes a chain, a first driving mechanism and a second driving mechanism arranged at both ends of the chain, and a plurality of scraping plates arranged on the chain; An auxiliary driving mechanism is arranged between the first driving mechanism and the second driving mechanism. Each auxiliary driving mechanism includes a plurality of parallel rotating shafts, and each rotating shaft is provided with a special-shaped gear; the special-shaped gear has a plurality of special-shaped teeth in the circumferential direction, and the head of the special-shaped tooth is cylindrical; a scraping plate groove bottom plate is arranged at the lower part of the scraping plate, and through holes and special-shaped gear covers that can allow the special-shaped teeth to penetrate are arranged on the scraping plate groove bottom plate. The angles of the special-shaped teeth of the special-shaped gears on adjacent rotating shafts are preset with deviation angles in sequence according to the conveying direction of the scraper conveyor; the special-shaped gears in the auxiliary driving mechanism and the chain in the first driving mechanism and the second driving mechanism jointly drive the scraping plate to achieve multi-stage cooperative driving; the special-shaped gear cover is adapted to the special-shaped teeth of the special-shaped gear protruding from the through hole.

2. The long-distance multi-stage driven scraper conveyor according to claim 1, characterized in that, The first driving mechanism includes a first driving source. A rotating shaft is arranged on the output shaft of the first driving source, and two first sprockets are arranged on the rotating shaft. Each first sprocket is provided with a chain; the two ends of the two chains are respectively meshed with the corresponding first sprocket and second sprocket.

3. The long-distance multi-stage driven scraper conveyor according to claim 2, characterized in that, The second driving mechanism includes a second driving source. A rotating shaft is arranged on the output shaft of the second driving source, and two second sprockets are arranged on the rotating shaft. Each second sprocket is provided with a chain; the two ends of the two chains are respectively meshed with the corresponding first sprocket and second sprocket.

4. The long-distance multi-stage drive scraper conveyor according to claim 3, characterized in that, The auxiliary driving mechanism includes an auxiliary driving source. The output shaft of the auxiliary driving source is connected with a reducer, and the output shaft of the reducer is connected with two driving sprockets through a clutch; two driving sprockets are respectively provided with a first driven rotating shaft and a second driven rotating shaft adjacent front and back, and a coplanar first driven sprocket and a second driven sprocket are respectively arranged; the first driven sprocket and the second driven sprocket are respectively connected with the corresponding driving sprockets in the same plane through a ring chain; the driving sprocket, the first driven sprocket and the second driven sprocket are respectively connected with an intermediate rotating shaft, a first driven rotating shaft and a second driven rotating shaft, and a plurality of special-shaped gears with the same deviation angle are arranged on the intermediate rotating shaft, the first driven rotating shaft and the second driven rotating shaft.

5. The long-distance multi-stage drive scraper conveyor according to claim 4, characterized in that, The first driving source, the second driving source and the auxiliary driving source are all permanent magnet motors, and the clutch is an electromagnetic clutch.

6. The long-distance multi-stage driven scraper conveyor according to claim 4, characterized in that, The plurality of special-shaped gears on the intermediate rotating shaft, the plurality of special-shaped gears on the first driven rotating shaft and the plurality of special-shaped gears on the second driven rotating shaft are arranged at the same angle on the same axis, and are sequentially deviated by 40° in the driving direction on different axes, and the special-shaped gears are arranged crosswise inside and outside.

7. A long-distance multi-stage drive scraper conveyor according to claim 1, characterized in that, The special-shaped gear cover is adapted to the special-shaped gear protruding from the through hole on the scraping plate groove bottom plate to prevent the leakage of the conveyed material when the special-shaped teeth normally protrude for driving.

8. The long-distance multi-stage driven scraper conveyor according to claim 1, characterized in that, The scraping plate is of an inverted L-shaped structure, including a vertical plate, a horizontal plate perpendicular to the vertical plate, and an arc part arranged at the connection of the vertical plate and the horizontal plate; the arc part is adapted to be meshed with the head of the special-shaped tooth on the special-shaped gear, and the horizontal plate ensures that the special-shaped tooth of the special-shaped gear does not break away from the scraping plate when driving the scraping plate.

9. The long-distance multi-stage drive scraper conveyor according to claim 1, characterized in that, The special-shaped gear is circumferentially evenly distributed with a plurality of special-shaped teeth. The head of the special-shaped tooth is cylindrical, and the number of special-shaped teeth is related to the number of rotating shafts of the auxiliary drive mechanism.

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