AU2019425998A1

AU2019425998A1 - Energy-saving and consumption-reducing belt conveyor

Info

Publication number: AU2019425998A1
Application number: AU2019425998A
Authority: AU
Inventors: Changjun CAO; Suhua PENG
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-03
Filing date: 2019-07-17
Publication date: 2021-08-26
Anticipated expiration: 2039-07-17
Also published as: WO2020155574A1; CN109625834A; AU2019425998B2; CN109625834B

Abstract

A belt conveyor, comprising a rack, and a drive roller, a redirection roller and supporting rollers which are supported on the rack, wherein the supporting rollers are divided into an upper supporting roller (1) and a lower supporting roller (2); an upward moving section and a downward moving section of the belt are supported by the upper supporting roller (1) and the lower supporting roll (2) respectively; the upper supporting roller (1) is installed on a first support, and the lower supporting roller (2) is installed on a second support; the first support comprises a first cross beam (4) and a plurality of first supporting racks (5); and the second support comprises a second cross beam (6) and second supporting racks (7). The first supporting racks (5) are respectively arranged alternately on the first cross beam (4), and the second supporting racks (7) are respectively arranged alternately on the second cross beam (6). The present belt conveyor may achieve three points on different dimension lines forming a face, thereby increasing effective contact points, enlarging a touch surface, reducing the weight of the supporting rollers, reducing friction, and reducing damage to the supporting rollers.

Description

ENERGY-SAVING AND CONSUMPTION-REDUCING BELT CONVEYOR FIELD OF THE DISCLOSURE

[0001] The disclosure relates to the field of belt conveyors, and more particularly to an energy saving and consumption-reducing belt conveyor.

BACKGROUND OF THE DISCLOSURE

[0002] A belt conveyor is an important material conveying equipment in industrial production. It has a large load carrying capacity and consumes more energy. As shown in FIG.1, the Chinese invention patent application No. 201610838497.3 (corresponding to the publication No. CN106429191A) discloses an energy-saving and consumption-reducing belt conveyor, including a machine frame, and a driving drum, a direction-change drum (also referred to as redirecting drum), upper rollers, lower rollers, a driving device, an anti-deflection device, an anti-skidding device, an electricity metering device and an operation control system supported on the machine frame. The driving drum and the direction-change drum are respectively disposed at turning sections on two opposite ends of a belt. The belt surrounds the driving drum and the direction change drum and is divided into an upper conveying section, a lower conveying section and the turning sections. The upper conveying section and the lower conveying section of the belt are respectively supported by the upper rollers and the lower rollers. The upper rollers and the lower rollers are respectively installed on a first support frame and a second support frame spaced from the first support frame . The upper rollers and the lower rollers are multiple rolling bearings in direct contact with the belt. The first support frame includes a first transverse beam and multiple first supporters, an upper end of each the first supporter is installed with the rolling bearing through a first shaft, and a lower end of each the first supporter isfixed onto the first transverse beam. The second support frame includes a second transverse beam and a second supporter, an upper end of the second supporter is installed with the rolling bearings through a second shaft, and a lower end of the second supporter is fixed with the second transverse beam. The first transverse beam and the second transverse beam are spaced from each other and fixed onto the machine frame along a widthwise direction of the belt.

[0003] However, the Chinese invention patent application No. 201610838497.3 has the following problem. In particular, the upper rollers and the lower rollers are multiple rolling bearings in direct contact with the belt, the first support frame includes the first transverse beam and the first supporters, the upper end of each the first supporter is installed/mounted with the rolling bearing by the first shaft, the second support frame includes the second transverse beam and the second supporter, the upper end of the second supporter is mounted with the rolling bearings through the second shaft, the lower end of the second supporter is fixed onto the second transverse beam, and the first transverse beam and the second transverse beam are fixed onto the machine frame along the widthwise direction of the belt. Such structure although solves the resistance between the belt and the rollers for conveying, the contact between the belt and the rolling bearing is a point or line contact, and a downward-recess arc is formed by points connected in series. After the belt for conveying is heavily loaded, the gravitational sinking will cause the belt to bulge downward, and the running resistance of the belt conveyor still exists but is appropriately reduced in some degrees. At the same time, it would damage the belt and increase the damage rate of parts such as the rolling bearings.

SUMMARY OF THE DISCLOSURE

[0004] In view of the above-mentioned defects and problems in the related art, a technical problem to be solved by the disclosure is to provide an improved energy-saving and consumption-reducing belt conveyor.

[0005] In order to achieve the above objective, the disclosure proposes the following technical solutions.

[0006] Specifically, an energy-saving and consumption-reducing belt conveyor includes a machine frame, and a driving drum, a direction-change drum and multiple (i.e., more than one) supporting rollers supported on the machine frame. The driving drum and the direction-change drum are respectively arranged turning sections on two ends of a belt, the belt is arranged around the driving drum and the direction-change drum and divided into an upper conveying section, a lower conveying section and the turning sections. The upper conveying section and the lower conveying section of the belt are respectively supported by upper supporting rollers and lower supporting rollers, the upper supporting rollers are mounted onto a first support frame, the lower supporting rollers are mounted onto a second support frame, and the belt is individually in direct contact with the upper supporting rollers and the lower supporting rollers.

[0007] The first support frame includes a first transverse beam and multiple first supporters, lower ends of the first supporters are fixed onto the first transverse beam, upper ends of the first supporters are mounted with the upper supporting rollers respectively, and bending parts respectively on the top of at least some of the plurality of first supporters form included angles with respect to a vertical direction.

[0008] The second support frame includes a second transverse beam and multiple second supporters, lower ends of the second supporters are fixed onto the second transverse beam, and upper ends of the second supporters are mounted with the lower supporting rollers respectively.

[0009] The first transverse beam and the second transverse beam are fixed onto the machine frame in a widthwise direction of the belt;

[0010] The first supporters are arranged on the first transverse beam in a staggered manner, and the plurality of second supporters are arranged on the second transverse beam in a staggered manner.

[0011] In an embodiment, each of the multiple supporting rollers includes a roller surface and a cylindrical support shaft. The roller surface and the support shaft have a bearing cavity formed therebetween, and in the bearing cavity, balls are arranged along an outer circumference of he support shaft. The roller surface and the support shaft are fixed by a snapping ring, a sealing tongue snaps a dust-proof cap onto outside of the snapping ring, and a protective cover is disposed outside of the bearing cavity.

[0012] In an embodiment, the roller surface is disposed with at least one anti-wear and anti adhesive layer being for example made of polyurethane.

[0013] In an embodiment, the first supporters are 3-11 in number, each of the first supporters is made of a steel pate, the lower end of each of the first supporters is welded perpendicular to the first transverse beam, the first supporters located on two opposite sides of a center line of the belt are symmetrically arranged, and the more approaching two outer sides of the belt in the widthwise direction, the greater the included angle of the bending part on the top of the first supporter with respect to the vertical direction. Outer sides of the upper supporting rollers are located on a same downward-recess arc.

[0014] In an embodiment, the included angle is in a range of 0-85degrees.

[0015] In an embodiment, in the widthwise direction of the belt, a vertical height of each of the first supporters located on the two outer sides of the belt is greater than a vertical height of any one of the first supporters located in the middle of the belt.

[0016] In an embodiment, the plurality of second supporters are 3-11 in number.

[0017] In an embodiment, the second support frame includes the second transverse beam and seven number of the second supporters, the seven number of second supporters are fixedly arranged on the machine frame along the widthwise direction of the belt, the upper ends of the seven number of second supporters are mounted with the lower supporting rollers respectively, the seven number of second supporters are welded onto the second transverse beam along a horizontal direction, and the seven number of second supporters include three second supporters A and four second supporters B. A height of each the second supporter A is the same as a height of each the second supporter B. The center line of the belt is taken as a reference, one second supporter A is located just below the center line of the belt, the four second supporters B and the remaining second supporters A are symmetrically arranged on two opposites sides of the second supporter A located just below the center line of the belt, as per an arrangement order of second supporter B, second supporter A and second supporter B in each of the two opposite sides; the three second supporters A together define a straight line in the horizontal direction, and the four second supporters B together define another straight line in the horizontal direction.

[0018] In an embodiment, the lower end of each the second supporter is welded perpendicular to he second transverse beam.

[0019] Sum up, the embodiments of the disclosure change the structure in the related art that uses a single bearing as a single support point, and adopts a staggered arrangement of supporting rollers so as to change conventional point and line contacts between the bearing and the belt to be point and surface contacts, thereby realizing a three-point defining surface on different dimensional lines, which can increase effective contact points, enlarge the contact surface, reduce the weight of the roller, solve the disadvantage that heavy load can not be carried in the related art, and reduce the damage of the supporting roller.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly describe technical solutions of embodiments of the disclosure or the related art more clearly, drawings that need to be used in the description of the embodiments or the related art will be briefly introduced in the following. Apparently, the drawings in the following description are only some embodiments of the disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] FIG.1 is a schematic structural view of an upper roller assembly and a lower roller assembly of a belt conveyor in the related art.

[0022] FIG.2 is a schematic structural front view of a first support frame according to an embodiment of the disclosure.

[0023] FIG.3 is a schematic structural top view of the first support frame according to the embodiment of the disclosure.

[0024] FIG.4 is a schematic structural side view of the first support frame according to the embodiment of the disclosure.

[0025] FIG. 5 is a schematic structural front view of a second support frame according to the embodiment of the disclosure.

[0026] FIG.6 is a schematic structural top view of the second support frame according to the embodiment of the disclosure.

[0027] FIG.7 is a schematic structural side view of the second support frame according to the embodiment of the disclosure.

[0028] FIG.8 is a schematic structural cross-sectional view of a supporting roller according to an embodiment of the disclosure.

[0029] Description of reference signs: 1.upper supporting roller, 2. lower supporting roller, 3. belt, 4. first transverse beam, 5. first supporter, 50. first supporter D1, 51. first supporter El, 52. bending part, 53. first supporter A, 54. first supporter B, 55. first supporter C, 56. first supporter D, 57. first supporter E, 58. first supporter B1, 59. first supporter C1, 6. second transverse beam, 7. second supporter, 71. second supporter A, 72. second supporter B, 8. contact point, 81. contact point A2, 82. contact point B2, 83. contact point A, 84. contact point B, 85. contact point C, 86. contact point D, 87. contact point E, 88. contact point BI, 89. contact point Cl, 90. contact point D1, 91. contact point El, 9. roller surface, 10. support shaft, 11. bearing cavity, 12. ball, 13. snapping ring, 14. sealing tongue, 15. dust-proof cap, 16. protective cover, 17. mounting bracket, 18. anti-wear and anti adhesive layer.

DETAILED DESCRIPTION OF EMBODIMENTS

[0030] The technical solutions of embodiments of the disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the disclosure. Apparently, the described embodiments are only part of the embodiments of the disclosure rather than all the embodiments. Based on the described embodiments of the disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the protection scope of the disclosure.

[0031] FirstEmbodiment

[0032] Referring to FIG.2 through FIG.4, an energy-saving and consumption-reducing belt conveyor according to the first embodiment of the disclosure, similar to the energy-saving and consumption-reducing belt conveyor disclosed in the Chinese invention patent application No. 201610838497.3, includes: a machine frame, and a driving drum and a direction-change drum (also referred to as redirecting drum) supported on the machine frame. The driving drum and the direction-change drum are respectively disposed at turning sections of two ends of a belt 3. The belt 3 is arranged around the driving drum and the direction-change drum and divided into an upper conveying section, a lower conveying section and the turning sections. The illustrated embodiment of the disclosure replaces the upper rollers and the lower rollers in the related art by supporting rollers. The supporting rollers are classified into upper supporting rollers 1 and lower supporting rollers 2. The upper conveying section and the lower conveying section of the belt are respectively supported by the upper supporting rollers 1 and the lower supporting rollers 2. The upper supporting rollers 1 are mounted/installed onto a first support frame by mounting brackets 17, the lower supporting roller 2 are mounted onto a second support frame by mounting brackets 17, and the belt 3 is individually in direct contact with the upper supporting rollers 1 and the lower supporting rollers 2 to form contact points.

[0033] As shown in FIG.8, each of the supporting rollers (1, 2) includes a roller surface 9 and a cylindrical support shaft 10. The roller surface 9 and the support shaft 10 have a bearing cavity 11 formed therebetween. In the bearing cavity 11, balls 12 are arranged along an outer circumference of the support shaft 10. The balls 12 acts/serves as a rolling component. The roller surface 9 and the cylindrical support shaft 10 are fixed by a snapping ring 13. A sealing tongue 14 snaps a dust-proof cap 15 onto outside of the snapping ring 13, and a protective cover 16 is disposed outside of the bearing cavity 11. The supporting roller adopts a sealing structure assembled by the sealing tongue 14, the protective cover 16 and the dust-proof cap 15 to protect the bearing and thereby increase the service life of the supporting roller. The roller surface 9 of the supporting roller is disposed with at least one polyurethane layer with a thickness of 3-15mm as an anti-wear and anti-adhesive layer 18. The polyurethane layer is made of polyurethane, which can increase the sliding of the supporting roller, reduce friction and reduce the adhesion of material on the supporting roller surface 9, thereby decreasing the frictional resistance between the belt and the supporting roller and reducing the energy consumption of the belt conveyor. The anti-wear and anti-adhesive layer 18 may be made of other materials such as rubber instead, but there is a problem of relatively large wear. In addition, it can be understood that the anti-wear and anti-adhesive layer 18 may be made of a material with similar properties to polyurethane, so as to achieve the purpose of reducing frictional resistance and having a durable life.

[0034] As illustrated in FIG.2 through FIG.4, the first support frame includes a first transverse beam (also referred to as first cross beam) 4 and nine first supporters. Lower ends of the first supporters are perpendicularly welded onto the first transverse beam 4, and the first transverse beam 4 is fixed onto the machine frame along a widthwise direction of the belt 3. Upper ends of the first supporters are installed/mounted with the upper supporting rollers 1 respectively. The first supporters each are made of a steel plate or a steel frame. A top end of each of at least some of the first supporters is formed with a bending part 52, and the bending part 52 forms an included angle relative to a vertical direction of the first supporter. When a center line of the belt 3 is taken as a reference, one first supporter is disposed just below the center line of the belt and marked/labeled as the first supporter A (53), and a contact point between the first supporter A (53) and the belt 3 is contact point A (83). On two opposite sides of the first supporter A (53), the first supporter B (54), the first supporter C (55), the first supporter D (56), the first supporter E (57), the first supporter B1 (58), the first supporter C1 (59), the first supporter D1 (50) and the first supporter E l (51) are staggeredly and symmetrically arranged. In other words, as seen from FIG. 2 and FIG. 3 together, the first supporter A (53), the first supporter B (54), the first supporter C (55), the first supporter D (56), the first supporter E (57), the first supporter B1 (58), the first supporter C1 (59), the first supporter D1 (50) and the first supporter El (51) are arranged in a staggered manner on the first transverse beam 4 along the horizontal direction; the first supporter B (54), the first supporter C (55), the first supporter D (56) and thefirst supporter E (57) located at one of the two opposite sides of the first supporter A (53) are symmetrically arranged with respect to the first supporter B1 (58), the first supporter C1 (59), thefirst supporter D1 (50) and the first supporter El (51) located at the other of the two opposite sides of the first supporter A (53). Moreover, the first supporter A (53), and the first supporter C (55), the first supporter E (57), the first supporter Cl (59), the first supporter El (51) arranged on the two opposite sides of the first supporter A (53) are located on a same straight line; and the first supporter B (54), the first supporter D (56), the first supporter B1 (58) and the first supporter D (50) are located on another same straight line. A height of the first supporter E (57) is the same as that of the first supporter El (51), a height of the first supporter D (56) is the same as that of the first supporter D1 (50), a height of the first supporter C (55) is the same as that of the first supporter C1 (59), and a height of the first supporter B (54) is the same as that of the first supporter B1 (58). In terms of height difference, the height of the first supporter E (57) > the height of the first supporter D (56) > the height of the first supporter C (55) > the height of the first supporter B (54) > the height of the first supporter A (53). A contact point between the first supporter B (54) and the belt 3 is contact point B (84), a contact point between the first supporter C (55) and the belt 3 is contact point C (85), a contact point between the first supporter D (56) an the belt 3 is contact point D (86), and a contact point between the first supporter E (57) and the belt 3 is contact point E (87). Likewise, a contact point between the first supporter B1 (58) and the belt 3 is contact point B1 (88), a contact point between the first supporter C1 (59) and the belt 3 is contact point C1 (89), a contact point between the first supporter D1 (50) an the belt 3 is contact point D1 (90), and a contact point between the first supporter E l (51) and the belt 3 is contact point El (91). The contact point C (85), the contact point C1 (89), the contact point A (83), the contact point E (87) and the contact point El (91) together form a downward-recess arc A; and the contact point D (86), the contact point B (84), the contact point B1 (88) and the contact point D1 (90) together form another downward-recess arc B. The downward-recess arc A and the downward-recess arc B are in parallel to each other. All the contact points (83-91) and the belt 3 are mutually in contact with each other to form an arc surface. The included angle of the bending part 52 on the top of the first supporter C (55) relative to the vertical direction is greater than the included angle of the bending part 52 at the top end of the first supporter B (54) relative to the vertical direction, the more approaching two outer sides of the belt in the widthwise direction, the greater the included angle between the bending part 52 on the top of the first supporter and the vertical direction. Such structure/arrangement changes the structure in the related art that uses a single bearing as a single support point, and adopts a staggered arrangement of supporting rollers to achieve a three-point defining surface on different dimensional lines, such as the contact point A (83), the contact point B (84) and the contact point B1 (88) together define a contact surface, and similarly, the contact point A (83), the contact point B (84) and contact point C (85) together define a contact surface. Such structural design can increase effective contact points and enlarge the contact surface, thereby realizing a heavy load of the supporting rollers, reducing an inertial resistance between the belt of the belt conveyor and the rollers, and reducing the resistance force caused by impact of a downward protrusion on the rollers resulting from downward gravity of the heavy load on the belt.

[0035] As seen from FIG.5 through FIG.7, the second support frame includes a second transverse beam (also referred to as second cross beam) 6 and seven second supporters. The second transverse beam 6 is fixed onto the machine frame along the widthwise direction of the belt 3. Upper ends of the second supporters are installed/mounted with the lower supporting rollers 2 respectively. The seven second supporters are fixedly welded onto the second transverse beam 6 along the horizontal direction. The seven second supporters are classified into three second supporters A (71) and four second supporters B (72). A height of each the second supporter A (71) is the same as that of each the second supporter B (72). When the centre line of the belt 3 is taken as a reference, one second supporter A (71) is disposed just below the center line of the belt 3, and on two opposite sides thereof, the four second supporters B (72) and the remaining two second supporters A (71) are arranged symmetrically. As a result, a arrangement order of the seven second supporters in the horizontal direction is that: second supporter B (72), second supporter A (71), second supporter B (72), second supporter A (71), second supporter B (72), second supporter A (71) and second supporter B (72). Moreover, as illustrated in FIG. 5 and FIG. 6, the three second supporters A (71) together define one straight line in the horizontal direction, and the four second supporters B (72) together define another straight line in the horizontal direction, thereby forming a structural arrangement of the four second supporters B (72) and the three second supporters A (71) being staggeredly arranged on the second transverse beam 6. A contact point between the lower supporting roller 2 on the upper end of each the second supporter A (71) and the belt 3 is contact point A2 (81), and a contact point between the lower supporting roller 2 on the upper end of each the second supporter B (72) and the belt 3 is contact point B2 (82). Two contact points A2 (81) and one contract point B2 together have three points in contact with the belt 3, and likewise, adjacent one contact point A2 (81) and two contact points B2 (82) together have three points in contact with the belt 3. As per the theory of three points defining a surface, the supporting rollers 2 and the belt 3 form a surface contact to achieve a heavy load support. Such structure changes the structure in the related art that uses a single bearing as a single support point, and adopts a staggered arrangement of supporting rollers to achieve a three-point defining surface on different dimensional lines, can increase effective contact points and enlarge the contact surface, thereby realizing a heavy load of the supporting rollers, reducing an inertial resistance between the belt of the belt conveyor and the rollers, and reducing the resistance force caused by impact of a downward protrusion on the rollers resulting from downward gravity of the heavy load on the belt.

[0036] Second Embodiment

[0037] Components included in the second embodiment, structures of various components, and relationships among the components are basically the same as those in the first embodiment. The difference is that: the belt is narrower than that in the first embodiment, the first support frame includes the first transverse beam and seven first supporters, and the second support frame includes the second transverse beam and five second supporters.

[0038] Third Embodiment

[0039] Components included in the third embodiment, structures of various components, and relationships among the components are basically the same as those in thefirst embodiment. The difference is that: the belt is narrower than that in thefirst embodiment, the first support frame includes the first transverse beam and nine first supporters, and the second support frame includes the second transverse beam and nine second supporters.

[0040] Fourth Embodiment

[0041] Components included in the fourth embodiment, structures of various components, and relationships among the components are basically the same as those in thefirst embodiment. The difference is that: the belt is narrower than that in thefirst embodiment, the first support frame includes the first transverse beam and seven first supporters, and the second support frame includes the second transverse beam and nine second supporters.

[0042] In summary, the first supporters are welded perpendicular to the first transverse beam, and the second supporters are welded perpendicular to the second transverse beam, which simplifies the processing and reduces the processing difficulty. Moreover, when any one supporting roller on the upper end of the first support frame or the second support frame is worn and damaged, there is no need to replace the first support frame or the second support frame, just replace the supporting roller, which saves the material and is convenient and fast for maintenance.

[0043] The above embodiments of the disclosure are improved solutions of the Chinese invention patent application No. 201610838497.3 (corresponding to the publication No. CN106429191A), and therefore the machine frame and the installations of the driving drum, the direction-change drum, the first transverse beam and the second transverse beam supported on the machine frame can refer to the content of the Chinese invention patent application No. 201610838497.3 which is fully incorporated herein as a part of the specification of the disclosure, and thus will not be repeated herein.

[0044] The above description is only specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of disclosure, which should be covered within the protection scope of the disclosure. Therefore, the protection scope of the disclosure shall be subject to the protection scope of the appended claims.

Claims

WHAT IS CLAIMED IS:

1. An energy-saving and consumption-reducing belt conveyor, comprising: a machine frame, and a driving drum, a direction-change drum and a plurality of supporting rollers supported on the machine frame; wherein the driving drum and the direction-change drum are respectively arranged turning sections on two ends of a belt, the belt is arranged around the driving drum and the direction-change drum and divided into an upper conveying section, a lower conveying section and the turning sections; wherein the plurality of supporting rollers comprise upper supporting rollers and lower supporting rollers, the upper conveying section and the lower conveying section of the belt are respectively supported by the upper supporting rollers and the lower supporting rollers, the upper supporting rollers are mounted onto a first support frame, the lower supporting rollers are mounted onto a second support frame, and the belt is individually in direct contact with the upper supporting rollers and the lower supporting rollers; wherein the first support frame comprises a first transverse beam and a plurality of first supporters, lower ends of the plurality of first supporters are fixed onto the first transverse beam, upper ends of the plurality of first supporters are mounted with the upper supporting rollers respectively, and bending parts respectively on the top of at least some of the plurality of first supporters form included angles with respect to a vertical direction; wherein the second support frame comprises a second transverse beam and a plurality of second supporters, lower ends of the plurality of second supporters are fixed onto the second transverse beam, and upper ends of the plurality of second supporters are mounted with the lower supporting rollers respectively; wherein the first transverse beam and the second transverse beam are fixed onto the machine frame along a widthwise direction of the belt; wherein the plurality of first supporters are staggeredly arranged on thefirst transverse beam, and the plurality of second supporters are staggeredly arranged on the second transverse beam.

2. The belt conveyor according to claim 1, wherein each of the plurality of supporting rollers comprises a roller surface and a cylindrical support shaft; the roller surface and the support shaft have a bearing cavity formed therebetween, and in the bearing cavity, balls are arranged along an outer circumference of he support shaft; the roller surface and the support shaft are fixed by a snapping ring, a sealing tongue snaps a dust-proof cap onto outside of the snapping ring, and a protective cover is disposed outside of the bearing cavity.

3. The belt conveyor according to claim 1, wherein the roller surface is disposed with at least one anti-wear and anti-adhesive layer.

4. The belt conveyor according to claim 2, wherein the roller surface is disposed with at least one anti-wear and anti-adhesive layer.

5. The belt conveyor according to claim 3, wherein the plurality of first supporters are 3-11 in number, each of the plurality of first supporters is made of a steel pate, the lower end of each of the plurality of first supporters is welded perpendicular to the first transverse beam, the first supporters located on two opposite sides of a center line of the belt are symmetrically arranged, and the more approaching two outer sides of the belt in the widthwise direction, the greater the included angle of the bending part on the top of the first supporter with respect to the vertical direction.

6. The belt conveyor according to claim 5, wherein the included angle is in a range of -85degrees.

7. The belt conveyor according to claim 6, wherein in the widthwise direction of the belt, a vertical height of each of the first supporters located on the two outer sides of the belt is greater than a vertical height of any one of the first supporters located in the middle of the belt.

8. The belt conveyor according to claim 7, wherein the first support frame comprises the first transverse beam and nine number of the first supporters, the lower ends of the nine number of first supporters are welded perpendicular to the first transverse, the first transverse beam is fixed onto the machine in the widthwise direction of the belt, and the upper ends of the nine number of first supporters are mounted with the upper supporting rollers respectively; wherein the center line of the belt is taken as a reference, the first supporter arranged just below the center line of the belt is first supporter A, a contact point between the first supporter A and the belt is contact point A, the first supporters staggeredly and symmetrically arranged two sides of the first supporter A are first supporter B, first supporter C, first supporter D and first supporter E, and first supporter B1, first supporter C1, first supporter Dl and first supporter E1; a height of the first supporter E is the same as that of the first supporter El, a height of the first supporter D is the same as that of the first supporter D1, a height of the first supporter C is the same as that of the first supporter C, and a height of the first supporter B is the same as that of the first supporter B1; in terms of height difference, the height of the first supporter E > the height of the first supporter D > the height of the first supporter C > the height of the first supporter B > a height of the first supporter A; a contact point between the first supporter B and the belt is contact point B, a contact point between the first supporter C and the belt is contact point C, a contact point between the first supporter D and the belt is contact point D, and a contact point between the first supporter E and the belt is contact point E; a contact point between the first supporter B1 and the belt is contact point B1, a contact point between the first supporter Cl and the belt is contact point C1, a contact point between the first supporter Dl and the belt is contact point D1, and a contact point between the first supporter E l and the belt is contact point E1; the contact point C, the contact point C1, the contact point A, the contact point E and the contact point El together define a downward-recess arc A; the contact point D, the contact point B, the contact point B Iand the contact point D together define another downward-recess arc B; and the downward-recess arc A and the downward-recess arc B are in parallel to each other.

9. The belt conveyor according to claim 8, wherein the plurality of second supporters are 3~11 in number.

10. The belt conveyor according to claim 9, wherein the lower ends of the plurality of second supporters are welded perpendicular to the second transverse beam.

11. The belt conveyor according to claim 9, wherein the second support frame comprises the second transverse beam and seven number of the second supporters, the seven number of second supporters are fixedly arranged on the machine frame along the widthwise direction of the belt, the upper ends of the seven number of second supporters are mounted with the lower supporting rollers respectively, the seven number of second supporters are welded onto the second transverse beam along a horizontal direction, and the seven number of second supporters comprise three second supporters A and four second supporters B; wherein the center line of the belt is taken as a reference, one second supporter A is located just below the center line of the belt, the four second supporters B and the remaining second supporters A are symmetrically arranged on two opposites sides of the second supporter A located just below the center line of the belt, as per an arrangement order of second supporter B, second supporter A and second supporter B in each of the two opposite sides; the three second supporters A together define a straight line in the horizontal direction, and the four second supporters B together define another straight line in the horizontal direction.

12. A belt conveyor, comprising: a belt, a plurality of supporting rollers, a first support frame and a second support frame; wherein the belt comprises an upper conveying section and a lower conveying section; wherein the plurality of supporting rollers comprise upper supporting rollers and lower supporting rollers, the upper conveying section and the lower conveying section of the belt are respectively supported by the upper supporting rollers and the lower supporting rollers, the upper supporting rollers are mounted onto the first support frame, the lower supporting rollers are mounted onto the second support frame, and the belt is individually in direct contact with the upper supporting rollers and the lower supporting rollers; wherein the first support frame comprises a first transverse beam and a plurality offirst supporters, lower ends of the plurality of first supporters are fixed onto the first transverse beam, upper ends of the plurality of first supporters are mounted with the upper supporting rollers respectively, the plurality of first supporters are arranged in a staggered manner in a horizontal direction and have different heights in a vertical direction perpendicular to the horizontal direction; wherein the second support frame comprises a second transverse beam and a plurality of second supporters, lower ends of the plurality of second supporters are fixed onto the second transverse beam, upper ends of the plurality of second supporters are mounted with the lower supporting rollers respectively, the plurality of second supporters are arranged in a staggered manner in the horizontal direction and have the same height in the vertical direction; wherein the first transverse beam and the second transverse beam are spaced from each other.

13. The belt conveyor according to claim 12, wherein bending parts respectively on the top of at least some of the plurality offirst supporters form included angles with respect to the vertical direction, and the included angles each are greater than 0 and less than or equal to degrees.

14. The belt conveyor according to claim 12, wherein some of the plurality of first supporters are located on a same straight line, and the others of the plurality offirst supporters are located on another same straight line.

15. The belt conveyor according to claim 12, wherein some of the plurality of second supporters are located on a same straight line, and the others of the plurality of second supporters are located on another same straight line.