WO2013020295A1

WO2013020295A1 - Bitumen stirring device, belt conveyor and drive structure thereof

Info

Publication number: WO2013020295A1
Application number: PCT/CN2011/078275
Authority: WO
Inventors: 尹友中; 张俊
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-08-11
Filing date: 2011-08-11
Publication date: 2013-02-14

Abstract

A drive structure for a belt conveyor comprises a driving roller (1). Two ends of the driving roller (1) are mounted on a bracket (7) through a bearing (6). The drive structure further comprises a screw (81) and a nut (82). Each side of the bracket (7) has a support beam (72). The support beam (72) is provided with a long slot (71). A bearing base (61) of the bearing (6) is disposed above the corresponding the support beam (72). The screw (81) penetrates the bearing base (61) and the long slot (71) and is fixed through the nut (82). Also disclosed are a belt conveyor with the drive structure and a bitumen stirring device. By means of the technical solution, the driving roller can be conveniently disassembled and maintained, and the tension degree of a conveying belt of the belt conveyor can be conveniently adjusted through adjusting a position of the driving roller on the support beam.

Description

Asphalt mixing equipment, belt conveyor and driving structure thereof

Technical field

The present invention relates to a drive structure for a belt conveyor, and to a belt conveyor having the drive structure and an asphalt mixing device having the belt conveyor. Background technique

Asphalt mixing equipment, also known as asphalt mixing equipment or asphalt mixing station, is the key equipment for asphalt pavement construction. It is mainly used to heat and measure sand and stone materials, asphalt and other materials into asphalt mixture. The loading conveyor of the asphalt mixing equipment is mainly used for conveying the aggregate at normal temperature into the drying drum to heat and dry the aggregate. The loading conveyor usually employs a belt conveyor. A belt conveyor is a machine that transports goods using a continuous conveyor belt, and typically includes a drive roller, a driven roller, and a conveyor belt that is tightly fitted over the drive roller and the driven roller. The drive roller is typically mounted to the bracket by bearings, and the rotating drive roller drives the belt movement by friction to transport the material placed on the conveyor belt. In a belt conveyor, the end of the material entering the belt conveyor is commonly referred to as the input end, and the end of the material leaving the belt conveyor is commonly referred to as the output end, the portion of the conveyor belt carrying the material (ie, from the input end The portion that extends to the output end) is often referred to as the load-bearing section of the conveyor belt, and the conveyor belt portion that returns from the output end to the input end is often referred to as the return section of the conveyor belt.

In a conventional belt conveyor (for example, in the belt conveyor disclosed in the publication No. CN2795127), a horizontal through groove is usually formed in the support plate on both sides of the bracket, and the end of the horizontal through groove is provided. A flaring, a bearing housing on which the bearing of the drive roller is mounted is slidably disposed in the horizontal through groove, and the bearing housing and the support plate are fixed to each other by adjusting the lead screw. Therefore, when repairing and disassembling the drive roller, the roller and other components must be adjusted to extend the length of the conveyor belt, and then the bearing housing is moved to the flared end of the horizontal groove to remove the bearing housing and the drive roller. Cause The disassembly and repair process of this drive roller is complicated.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a drive structure for a belt conveyor which can be easily disassembled and repaired.

In order to achieve the above object, the present invention provides a driving structure of a belt conveyor, the driving structure comprising a driving roller, the two ends of the driving roller are respectively mounted on the bracket by bearings, wherein the driving structure further comprises a bolt and a nut. Each of the two sides of the bracket has a support beam, and the support beam is provided with a long slot. The bearing seat of the bearing is disposed above the corresponding support beam, and the bolt passes through the bearing seat and the long slot and passes through the The nut is fastened.

Preferably, a distance between a head of the bolt and the nut is greater than a sum of thicknesses of a bearing seat and a support beam through which the screw of the bolt penetrates, and the driving structure further includes a length along the length of the long groove Fixing the bracket and the fixing of the bearing housing.

Preferably, the fixing member is an adjustable member for adjusting a distance between the bracket and the bearing housing along a length direction of the long groove.

Preferably, the fixing member is a screw.

Preferably, the driving structure further comprises a sliding plate, the sliding plate is disposed between the bearing seat and the supporting beam, the fixing member is fixed on the sliding plate and the bracket, and the head and the bolt are fixed The distance between the nuts is greater than the sum of the thicknesses of the bearing housing, the slide plate and the support beam through which the screw of the bolt passes.

Preferably, the two ends of the sliding plate are respectively formed with side plates extending perpendicular to the plate surface of the sliding plate, the bearing seat is disposed between the two side plates, and the fixing member is fixed on one of the side plates .

Preferably, there is a gap between the bearing seat and the side plate and is fixed by a fastener. Preferably, the screw of the bolt includes a first rod segment near the bolt head and a second rod segment away from the bolt head, the rod diameter of the first rod segment is larger than the inner diameter of the nut, and the first The length of the rod segment is greater than the sum of the thicknesses of the bearing housing, the sliding plate and the support beam through which it is An external thread that cooperates with the nut is formed on the second rod segment.

Preferably, the length of the first rod segment is greater than the sum of the thicknesses of the bearing block, the slide plate and the support beam by 0.5-1.5 mm.

Preferably, the nut is disposed above the bearing housing.

Preferably, the drive roller is a motorized drum.

In another aspect, the present invention also provides a belt conveyor comprising a driving roller, a driven roller and a conveyor belt, the conveyor belt being sleeved on the driving roller and the driven roller, wherein The belt conveyor includes a drive structure of the belt conveyor as described above.

Preferably, the drive roller is disposed at an input end of the belt conveyor.

Preferably, the driven roller is disposed at an output end of the belt conveyor.

Preferably, the belt conveyor further includes a tensioning wheel disposed at a position of the return section of the conveyor belt adjacent to the input end.

Preferably, the output end of the belt conveyor is further provided with a sweeper.

In still another aspect, the present invention provides an asphalt mixing apparatus, wherein the loading conveyor of the asphalt mixing apparatus is a belt conveyor as described above.

Preferably, the output end of the belt conveyor extends into the drying drum of the asphalt mixing plant.

According to the above technical solution, since the bearing housing of the bearing is disposed above the support beam and fixed to the support beam by bolts and nuts, when the drive roller is disassembled and repaired, the bearing housing and the drive can be driven only by loosening the nut. The drum is detached without the need to adjust the components such as the idler, so that the drive roller can be easily disassembled, repaired, and the like. In addition, after the nut is loosened, by sliding the bolt in the long groove, the bearing seat can be conveniently guided to slide along the length of the long groove on the support beam, thereby conveniently adjusting the position of the driving roller on the support beam to adjust the belt conveyor. The tension of the conveyor belt of the machine.

Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are in the In the drawing:

1 is a perspective view of a drive structure of a belt conveyor according to an embodiment of the present invention;

Figure 2 is a partial cross-sectional side view of the drive structure shown in Figure 1;

Figure 3 is a partial enlarged view of a portion A in Figure 2;

Fig. 4 is a schematic view showing the structure of a belt conveyor according to an embodiment of the present invention; and Fig. 5 is a schematic view showing the winding direction of the belt conveyor of the belt conveyor shown in Fig. 4. Description of the reference numerals

1 drive roller; 2 driven roller;

3 conveyor belt; 4 tension pulleys;

5 cleaner; 6 bearings;

7 bracket; 61 bearing housing;

81 bolts; 82 nuts;

9 skateboard; 71 long slot;

811 first pole segment; 812 second pole segment;

83 side plates; 10 lead screws;

20 drying drum; 72 support beam. detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to Bright.

The input end of the belt conveyor of the present invention means that the material enters the end of the belt conveyor

(e.g., the end where the drive drum 1 is located in Figures 4 and 5), the output end refers to the end of the material exiting the belt conveyor (e.g., the end of the driven drum 2 in Figures 4 and 5), The carrying section of the conveyor belt 3 refers to the portion of the conveyor belt 3 carrying the material (i.e. the portion extending from the input end to the output end, such as the upper portion of the conveyor belt 3 in Figures 4 and 5), the return section of the conveyor belt means Returning from the output to the conveyor belt portion of the input (such as the lower portion of the conveyor belt 3 in Figures 4 and 5).

As shown in FIG. 1 to FIG. 3, an embodiment of the present invention provides a driving structure of a belt conveyor, which comprises a driving drum 1, and two ends of the driving drum 1 are respectively mounted on the bracket through bearings 6. In the above, the driving structure further includes a bolt 81 and a nut 82. The bracket 7 has a support beam 72 on each side thereof, and the support beam 72 is provided with a long slot 71. The bearing seat 61 of the bearing 6 is disposed at Above the corresponding support beam 72, the bolt 81 penetrates the bearing housing 61 and the long groove 71 and is fastened by the nut 82.

With the above technical solution, since the bearing housing 61 of the bearing 6 is disposed above the support beam 72 and is fixed to the support beam 72 by the bolt 81 and the nut 82, it is only necessary to loosen the nut when the drive roller 1 is disassembled and repaired. 82, the bearing housing 61 and the drive roller 1 can be detached without adjusting the components such as the idler, so that the drive roller 1 can be easily disassembled, repaired, and the like. Further, after the nut 82 is loosened, by sliding the bolt 81 in the long groove 71, the bearing housing 61 can be easily guided to slide along the length of the long groove 71 on the support beam 72, thereby conveniently adjusting the drive roller 1 in the support. The position on the beam 72 is to adjust the tension of the conveyor belt 3 of the belt conveyor.

As shown in Fig. 1, both ends of the drive roller 1 are mounted to the respective support beams 72 via bearings 6, respectively. Only the mounting structure of one end of the driving drum 1 will be described in detail below, and the mounting structure at the other end will be substantially similar, and will not be described again.

Preferably, the distance between the head of the bolt 81 and the nut 82 is greater than the sum of the thicknesses of the bearing housing 61 and the support beam 72 through which the screw of the bolt 81 penetrates, and the driving structure further includes The longitudinal direction of the long groove 71 fixes the fixing of the bracket 7 and the bearing housing 61 Pieces. That is, in the axial direction of the bolt 81, the bearing housing 61 and the support beam 72 are not completely fixed, but there is a certain adjustment margin, so that the bearing housing 61 can be made relative to the support beam 72 without loosening the nut 82. The sliding makes it possible to adjust the tension of the conveyor belt 3 more conveniently and quickly. The distance between the head of the bolt 81 and the nut 82 is only slightly larger than the sum of the thicknesses of the bearing housing 61 and the support beam 72 through which the screw of the bolt 81 penetrates, and only the bearing housing 61 can be slid relative to the support beam 72, and The fixing between the bearing housing 61 and the support beam 72 in the axial direction of the bolt 81 is not substantially affected. At this time, in the longitudinal direction of the long groove 71, the bearing housing 61 is also fixed to the bracket 7 by a fixing member (which can be fixed to the support beam 72 of the bracket 7 or other suitable position), thereby enabling the bearing housing 61 is firmly fixed.

Preferably, the fixing member may be an adjustable member for adjusting a distance between the bracket 7 and the bearing housing 61 along the length direction of the long groove 71. Thereby, the tension of the conveyor belt 3 can be more conveniently adjusted.

The above-mentioned adjustable fixing member can adopt various appropriate forms as a specific embodiment. As shown in Figs. 1 and 2, the fixing member is a screw 10. More specifically, the lead screw 10 includes a screw 101 and nuts 101a, 101b, 101c and 101d, and the bearing housing 61 and the bracket 7 can be connected by a screw 101 and locked by nuts 101a, 101b, 101c and lOld, for example, as shown in FIG. As shown in Fig. 2, both ends of the screw 101 are locked by a pair of nuts 101a, 101b and 101c, lOld, respectively. When adjusting, the pair of nuts 101a, 101b at the end of the screw 101 are kept locked, one of the nuts 101c at the other end of the screw 101 is loosened (the nut is selected according to the required adjustment direction), and then the other nut 101d at the other end is twisted. The screw 101 is moved to drive the bearing housing 61 to slide on the support beam 72 to the desired position along the length of the long groove 71, and then the nuts 101c and lOld are locked. The lead screw 10 at both ends of the drive roller 1 can be adjusted alternately or simultaneously by two staff members to achieve the desired tension of the conveyor belt 3. Of course, the verticality of the drive roller 1 relative to the support beam 72 can also be adjusted by adjusting one of the lead screws 10 to prevent the conveyor belt 3 from being deflected.

Preferably, as shown in FIGS. 1 to 3, the driving structure further includes a slide plate 9, the slide plate 9 Provided between the bearing housing 61 and the support beam 72, at this time, the fixing member is fixed on the sliding plate 9 and the bracket 7, between the head of the bolt 81 and the nut 82 The distance is greater than the sum of the thicknesses of the bearing housing 61, the slider 9 and the support beam 72 through which the screw of the bolt 81 passes. By providing the slider 9, the above-mentioned fixing member (for example, the lead screw 10) can be fixed to the slider 9 without being directly fixed to the bearing housing 61, thereby facilitating the fixing of the fixing member. And by adjusting the fixing member, the sliding plate 9 drives the bearing housing 61 and the driving roller 1 to slide together with respect to the supporting beam 72, thereby adjusting the tension of the conveyor belt 3.

The specific shape of the slider 8 can be designed as needed, for example, it can be a flat plate. Preferably, as shown in FIG. 1 and FIG. 2, the two ends of the sliding plate 9 are respectively formed with side plates 91 extending perpendicular to the plate surface of the sliding plate 9, and the bearing seats 61 are disposed on the two side plates 91. Between the fixing members (for example, the lead screw 10) is fixed to one of the side plates 91. The provision of the side plates 91 can limit the movement of the bearing housing 61 relative to the slide plate 9 to make the bearing housing 61 more stable.

The bearing housing 61 may be disposed in close fitting between the two side plates 91, but preferably, as shown in FIGS. 1 and 2, there is a gap between the bearing housing 61 and the side plate 91 and through the fastener 92 is fixed. It is more convenient to arrange the bearing housing 61 between the two side plates 91 by providing a clearance.

More preferably, as shown in FIGS. 2 and 3, the screw of the bolt 81 includes a first rod segment 811 near the bolt head and a second rod segment 812 away from the bolt head, the first rod segment 811 The diameter of the rod is larger than the inner diameter of the nut 82, and the length of the first rod segment 811 is greater than the sum of the thicknesses of the bearing housing 61, the sliding plate 9 and the supporting beam 72 through which it is penetrated (ie, the first rod segment 811 has a margin) S), the second rod segment 812 is formed with an external thread that cooperates with the nut 82. That is, the screw of the bolt 81 is arranged in a stepped shape, and when the nut 82 is fastened to the second rod segment 812, the slide plate 9 and the support beam 72 are not completely fixed in the axial direction of the screw, so there is no need to loosen the nut. 82, the slide plate 9 and the bearing housing 61 can be slid relative to the support beam 72, so that the tension of the conveyor belt 3 can be adjusted more conveniently and quickly. Of course, the length of the first rod segment 811 is greater than the sum of the thicknesses of the bearing housing 61, the sliding plate 9 and the support beam 72 through which the length of the rod segment 811 is only slightly. More than the sum of the thicknesses of the bearing housing 61, the slider 9 and the support beam 72, it is only necessary to be able to slide the slider 9 and the bearing housing 61 relative to the support beam 72 without substantially affecting the bearing housing 61 and the slider 9 at the support beam. Fixed on 72. More specifically, as shown in FIG. 3, the length of the first rod segment 811 may be 0.5-1.5 mm larger than the sum of the thicknesses of the bearing housing 61, the slider 9 and the support beam 72, that is, the remainder of the first rod segment 811. The amount S may be 0.5-1.5 mm, for example as shown in Fig. 3, the margin S is lmnio

The mounting direction of the bolts 81 (ie, the through direction) may be set as needed, that is, the nut 82 may be disposed below the support beam 72 (as shown in FIGS. 2 and 3), but preferably, the nut 82 is disposed. Above the bearing housing 61, the operation of the nut 82 can be facilitated.

Since the nut is not fastened on the first rod segment 811 of the bolt 81, the first rod segment 811 can be threaded.

The drive roller 1 may be a drum of various forms, for example, a drum that is driven by an additionally configured motor and a transmission mechanism. Preferably, the drive roller 1 is a motorized drum, so that no additional configuration of the drive device and the transmission mechanism is required. Therefore, the volume is small and convenient to arrange.

On the other hand, as shown in FIG. 4 and FIG. 5, the present invention also provides a belt conveyor comprising a driving roller 1, a driven roller 2, and a driving sleeve 1 and a driven sleeve A conveyor belt 3 on the drum 2, wherein the belt conveyor comprises a drive structure of the belt conveyor as described above.

Preferably, in the belt conveyor, the drive roller 1 is disposed at a position spaced apart from the output end of the belt conveyor. That is, the drive roller 1 is not placed at the output end of the conveyor. Since the output end of the belt conveyor usually needs to be provided with some other functional devices, by making the drive roller 1 not disposed at the output end of the conveyor, the volume of the output end of the belt conveyor can be prevented from being too large, thereby facilitating the belt conveyor. The arrangement, for example, as described below, when the belt conveyor is used as a loading conveyor for an asphalt mixing plant, can facilitate the insertion of the output end of the conveyor into the interior of the drying drum.

The drive roller 1 can be disposed at various suitable positions, as an embodiment, such as As shown in Figures 4 and 5, the driving roller 1 can be disposed at the input end of the belt conveyor, and a driven roller 2 (i.e., the redirecting roller) is disposed at the output end of the belt conveyor, which is relatively simple in arrangement. . Of course, as another embodiment (not shown), the drive roller 1 can also be disposed at a position between the input end and the output end of the belt conveyor. At this time, a driven roller 2 is respectively disposed at the input end and the output end, and the driving roller 1 is disposed at the return section of the conveyor belt 3, thereby maintaining a straight line in the carrying section of the conveyor belt 3 (from the input end to the output end) Straight line) to transport the material, and the return section is a polyline (from the input through the drive roller to the output). Of course, it is also possible to provide more driven rollers 2 between the input end and the output end as needed.

In the embodiment in which the drive roller 1 is disposed at the input end, in this case the portion of the return path of the conveyor belt 3 of the belt conveyor near the input end is relatively slack, so preferably, as shown in FIGS. 4 and 5, The belt conveyor further comprises a tensioning pulley 4 which is arranged at a position of the return section of the conveyor belt 3 close to the input end. The tensioning pulley 4 is arranged to tension the relatively loose portion. The number of the tensioning pulleys 4 can be set as needed. Preferably, the tensioning pulleys 4 are plural, and are arranged alternately up and down with respect to the returning section of the conveyor belt 3, and the arrangement of the upper and lower staggered can be more It is advantageous to tension the conveyor belt 3. Only two tensioning pulleys 4 are shown in Figures 4 and 5, but of course more tensioning pulleys 4 can be provided as needed.

Preferably, a tensioning wheel adjusting device can also be provided on the tensioning pulley 4 to adjust the tension of the tensioning pulley 4. The tensioning wheel adjusting device can adopt various specific structures, for example, it can be a biasing member (for example, a spring) which is disposed on the tensioning pulley 4 and biases the tensioning pulley 4 toward the return section of the conveyor belt 3. Pressing, the tension of the tensioning pulley 4 can be adjusted by adjusting the biasing force of the biasing member. In addition, the tensioning wheel adjusting device may also be a gravity tensioning member (for example, a weight) which is disposed on the tensioning pulley 4 above the returning section of the conveyor belt 3, so that the gravity of the gravity tensioning member A downward force is exerted on the tensioning pulley 4, so that the conveyor belt 3 is tensioned, and the tension of the tensioning pulley 4 can be adjusted by adjusting the gravity of the gravity tensioning member.

Preferably, as shown in Figure 4, the output of the belt conveyor may also be provided with a sweeper 5 to facilitate cleaning of the residue remaining at the output. The cleaner 5 can be of various suitable structures. For example, it may be a scraper or the like.

In another aspect, the present invention provides an asphalt mixing apparatus, wherein the loading conveyor of the asphalt mixing apparatus is a belt conveyor as described above. Preferably, as described above, the output end of the belt conveyor extends into the drying drum 20 of the asphalt mixing device (as shown in FIG. 4) so as not to leak material, pollute the environment, and reduce The labor intensity of the staff.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and should also be regarded as the disclosure of the invention.

Claims

Rights request

A drive structure for a belt conveyor, the drive structure comprising a drive roller (1), the two ends of the drive roller (1) being respectively mounted on the bracket (7) via bearings (6), characterized in that The driving structure further includes a bolt (81) and a nut (82), the bracket (7) has a support beam (72) on each side thereof, and the support beam (72) is provided with a long groove (71), the bearing ( 6) a bearing block (61) is disposed above the corresponding support beam (72), the bolt (81) penetrating through the bearing seat (61) and the long groove (71) and tightly passing the nut (82) solid.

2. The drive structure of a belt conveyor according to claim 1, wherein a distance between a head of the bolt (81) and the nut (82) is greater than a screw of the bolt (81) a sum of thicknesses of the bearing housing (61) and the support beam (72), and the driving structure further includes fixing the bracket (7) and the bearing housing along the length direction of the long groove (71) ) The fixings.

3. The driving structure of a belt conveyor according to claim 2, wherein the fixing member is an adjustable member for adjusting an edge between the bracket (7) and the bearing housing (61) The distance in the length direction of the long groove (71).

The driving structure of the belt conveyor according to claim 3, wherein the fixing member is a screw (10).

The driving structure of the belt conveyor according to any one of claims 2 to 4, characterized in that the driving structure further comprises a slide plate (9), and the slide plate (9) is disposed at the bearing housing

(61) Between the support beam (72), the fixing member is fixed on the sliding plate (9) and the bracket (7), the head of the bolt (81) and the nut (82) The distance between the bearing block (61), the slide plate (9) and the support beam (72) through which the screw of the bolt (81) penetrates The sum of the thicknesses.

The driving structure of the belt conveyor according to claim 5, characterized in that the two ends of the sliding plate (9) are respectively formed with side plates (91) extending perpendicular to the plate surface of the sliding plate (9). The bearing housing (61) is disposed between the two side plates (91), and the fixing member is fixed to one of the side plates (91).

7. The driving structure of a belt conveyor according to claim 6, wherein a gap is formed between the bearing housing (61) and the side plate (91) and fixed by a fastener (92). .

8. The driving structure of a belt conveyor according to claim 5, wherein the screw of the bolt (81) includes a first rod segment (811) near the bolt head and a second portion away from the bolt head. a rod segment (812), a rod diameter of the first rod segment (811) is larger than an inner diameter of the nut (82), and a length of the first rod segment (811) is greater than a bearing housing through which the bearing rod (811) is inserted ( 61), a sum of thicknesses of the sliding plate (9) and the supporting beam (72), and the second rod segment (812) is formed with an external thread that cooperates with the nut (82).

9. The driving structure of a belt conveyor according to claim 8, wherein the length of the first rod segment (811) is longer than the bearing housing (61), the sliding plate (9) and the supporting beam (72) The sum of the thicknesses is 0.5-1.5 mm.

The driving structure of the belt conveyor according to any one of claims 2 to 4, characterized in that the nut (82) is disposed above the bearing housing (61).

11. The driving structure of a belt conveyor according to claim 1, wherein The drive roller (1) is an electric roller

12. A belt conveyor comprising a drive roller (1), a driven roller (2) and a conveyor belt (3), the conveyor belt (3) being sleeved on the drive roller (1) and The driven roller (2) is characterized in that the belt conveyor comprises the driving structure of the belt conveyor according to any one of claims 1-11.

13. A belt conveyor according to claim 12, wherein said drive roller

(1) is provided at the input end of the belt conveyor.

The belt conveyor according to claim 13, wherein the driven roller

(2) Set at the output of the belt conveyor.

The belt conveyor according to claim 13, characterized in that the belt conveyor further comprises a tensioning wheel (4), the tensioning wheel (4) being arranged on the conveyor belt (3) The position of the return section near the input end.

The belt conveyor according to claim 12, characterized in that the output end of the belt conveyor is further provided with a cleaner (5).

An asphalt mixing apparatus, characterized in that the loading conveyor of the asphalt mixing apparatus is the belt conveyor according to any one of claims 12-16.

18. An asphalt mixing plant according to claim 17, wherein the output end of the belt conveyor extends into the drying drum (20) of the asphalt mixing plant.