WO2025231585A1 - Belt conveyor and conveying method - Google Patents

Abstract

Disclosed are a belt conveyor and a conveying method. The belt conveyor comprises a belt (10) and a plurality of idler sets (20). Each idler set comprises inclined idlers (21) on two sides and a horizontal idler (22) in the middle, the axes of the idlers in each idler set forming a trough shape. Limiting devices (30) are arranged on two sides of the idler sets corresponding to lower arc transition sections of the belt during uphill or downhill movement, and the limiting devices are configured to apply counter pressure on the belt under no-load conditions, such that the belt is limited onto the idler sets to prevent the belt from being pulled up. The limiting devices are configured to apply counter pressure on the belt under no-load conditions to prevent the belt from being pulled up, thereby preventing the problem of material spillage.

Description

Belt conveyors and conveying methods Technical Field

This invention relates to the field of material conveying, and specifically provides a belt conveyor and conveying method.

Background Technology

Belt conveyors, also known as belt conveyors or rubber belt conveyors, are a common type of material conveying equipment.

Belt conveyors utilize a continuous belt, driven by a motor and supported by rollers or drive wheelsets, to achieve continuous material transport. Belt conveyors can be used for horizontal, inclined, and vertical conveying, and are suitable for transporting powdery, granular, and small lump materials, such as cement, grain, fertilizer, sand, coke, coal powder, ash, concrete, and sawdust. They are widely used in the building materials, grain, fertilizer, and metallurgical industries.

Most belt conveyors employ trough conveying to achieve greater carrying capacity. However, trough conveyors can experience material spillage when unloaded on inclines or declines. Therefore, there is an urgent need to develop a belt conveyor and conveying method that can solve this problem.

Summary of the Invention

The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that material spillage occurs when belt conveyors using trough conveying in the prior art are unloaded during uphill or downhill conditions.

In a first aspect, the present invention provides a belt conveyor comprising a belt and multiple... Each idler set includes two inclined idlers on both sides and a horizontal idler in the middle. The axis of the idler in each idler set is groove-shaped. The belt is provided with limiting devices on both sides of the idler set corresponding to the lower arc transition section of the uphill or downhill slope. The limiting devices are configured to back-press the belt when unloaded, so that the belt is restricted on the idler set to avoid the phenomenon of the belt being pulled up.

In the preferred embodiment of the belt conveyor described above, the limiting device includes a set of vertical roller assemblies. The set of vertical roller assemblies is located near the center of the idler group corresponding to the lower arc transition section, and the set of vertical roller assemblies is correspondingly located on both sides of the idler group. The vertical rollers of the set of vertical roller assemblies are configured to apply counter-pressure to the belt, so that the belt is restricted on the idler group when unloaded.

In the preferred embodiment of the belt conveyor described above, the set of vertical roller assemblies includes a first vertical roller assembly and a second vertical roller assembly. Each set of vertical roller assemblies includes at least one vertical roller. The first vertical roller assembly is disposed on one of the inclined idlers on both sides, and the second vertical roller assembly is disposed on the other of the inclined idlers on both sides.

In the preferred embodiment of the belt conveyor described above, the extended axes of all the vertical rollers in the first vertical roller assembly and the extended axes of all the vertical rollers in the second vertical roller assembly intersect with the centerline of the belt corresponding to the lower arc transition section under load conditions.

In the preferred embodiment of the belt conveyor described above, the limiting device includes multiple sets of vertical roller assemblies, which are spaced apart on the idler group corresponding to the lower arc transition section. Each set of vertical roller assemblies is correspondingly arranged on both sides of the idler group. The vertical rollers of each set of vertical roller assemblies apply counter-pressure to the belt, so that the belt is restricted on the idler group when unloaded.

In the preferred embodiment of the belt conveyor described above, the multiple sets of vertical roller assemblies are arranged at equal intervals on the idler roller set corresponding to the lower arc transition section.

In the preferred embodiment of the belt conveyor described above, each set of vertical roller assemblies includes a first vertical roller assembly and a second vertical roller assembly. Each set of vertical roller assemblies includes at least one vertical roller. The first vertical roller assembly is located at one of the inclined idlers on both sides, and the second vertical roller assembly is located at the other of the inclined idlers on both sides.

In the preferred embodiment of the belt conveyor described above, the extended axes of all the vertical rollers in the first vertical roller assembly and the extended axes of all the vertical rollers in the second vertical roller assembly intersect with the centerline of the belt corresponding to the lower arc transition section under load conditions.

In the preferred embodiment of the belt conveyor described above, the limiting device includes at least one set of baffle assemblies, which are disposed on the lower arc transition section and correspondingly disposed on both sides of the idler group. The baffles of the at least one set of baffle assemblies are configured to apply counter-pressure to the belt, so that the belt is restricted on the idler group when unloaded.

In a second aspect, the present invention also provides a conveying method for a belt conveyor, wherein the conveying method employs the aforementioned belt conveyor for conveying.

In a preferred embodiment of the above-described conveying method, the conveying method includes:

When the belt of the belt conveyor passes through the downward arc transition section of an uphill or downhill slope, and under no-load conditions, the limiting device applies counter-pressure to the belt, thereby restricting the belt onto the idler roller assembly; or...

When the belt of the belt conveyor passes through the lower arc transition section of an uphill or downhill slope, and is under load, the limiting device does not function on the belt.

When adopting the above technical solution, the belt conveyor and conveying method of the present invention employ a trough-type conveying method. The belt conveyor includes a belt, multiple idler roller groups, and limiting devices. Limiting devices are provided on both sides of the idler roller groups corresponding to the lower arc transition section of the belt on an uphill or downhill slope. The limiting devices are configured to counter-pressure the belt when unloaded, thereby restricting the belt within the idler roller groups. This prevents the conveyor belt from being pulled up, thus avoiding material spillage.

Attached Figure Description

The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

Figure 1 is a schematic diagram of the belt conveyor of the present invention in the transition section.

Figure 2 is a schematic diagram of the belt state of the belt conveyor of the present invention when it is under load or unloaded and without tension.

Figure 3 is a schematic diagram of the belt state of the belt conveyor of the present invention when it is unloaded and under tension;

Figure 4 is a schematic perspective view of the idler roller assembly and the limiting device of the present invention assembled together;

Figure 5 is a schematic side view of the limiting device in Figure 4;

Figure 6 is a schematic perspective view of the belt conveyor of the present invention when it is equipped with multiple sets of limiting devices;

Figure 7 is a schematic diagram of the belt state of the belt conveyor of the present invention when it is under load or unloaded and without tension.

Figure 8 is a schematic diagram of the belt state of the belt conveyor of the present invention when it is unloaded and under tension;

Figure 9 is a schematic side view of the limiting device in Figure 8;

Figure 10 is a schematic perspective view of the idler roller assembly and the limiting device of the present invention assembled together.

The symbols in the diagram represent the following meanings:

100 belt conveyor

10 belts,

20 Idler sets, 21 Inclined idlers, 22 Horizontal idlers, 23 Idler brackets

30 Limiting device,

31 Vertical roller assembly, 32 First vertical roller assembly, 321 Vertical roller, 322 First face, 323 Vertical roller support, 33 Second vertical roller assembly, 331 Second face

40 rollers,

A indicates the position of the belt under no-load and tension conditions;

B indicates the belt position under load or without tension.

C represents a straight line segment.

D represents the lower arc transition segment.

E represents the upper arc transition segment;

F represents the centerline of the belt shaft in the lower arc transition section;

G represents the axis of the vertical roller.

Detailed Implementation

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection, or... They can be indirectly connected through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

Belt conveyors, also known as belt conveyors or rubber belt conveyors, are a common type of material handling equipment. A belt conveyor typically consists of a belt, idler rollers, drums (or drive pulleys), and a tensioning device. Belt conveyors use a continuous belt, driven by a motor and aided by the rollers or drive pulleys, to continuously transport materials. Belt conveyors can be used for horizontal, inclined, and vertical transport. Most existing belt conveyors employ trough conveying to achieve greater carrying capacity. However, trough conveyors may experience material spillage when unloaded on inclines or declines.

The inventors discovered that belt conveyors, whether going uphill or downhill, exhibit a downward-curving transition section where the belt curves downwards. Under no-load conditions, the belt tension causes this section to move in the chordal direction of the downward curve, effectively pulling it off the idler rollers. This phenomenon typically occurs at the beginning or end of operation, leading to material spillage. Inventing a device or method to prevent the belt from being pulled up would prevent material spillage. Based on this, the belt conveyor and conveying method of this invention were developed.

Figure 1 is a schematic diagram of the belt conveyor of the present invention operating in the transition section. Figure 2 is a schematic diagram of the belt state of a belt conveyor according to an embodiment of the present invention when under load or without tension. Figure 3 is a schematic diagram of the belt state of a belt conveyor according to an embodiment of the present invention when under tension but without load. Figure 4 is a schematic perspective view of an embodiment of the present invention with the idler roller group and the limiting device assembled together. Figure 5 is a schematic side view of the limiting device in Figure 4. Figure 6 is a schematic perspective view of an embodiment of the present invention with multiple sets of limiting devices. Figure 7 is a schematic diagram of the belt state of a belt conveyor according to another embodiment of the present invention when under load or without tension. Figure 8 is a schematic diagram of the belt state of a belt conveyor according to another embodiment of the present invention when under tension but without load. Figure 9 is a schematic side view of the limiting device in Figure 8. Figure 10 is a schematic perspective view of another embodiment of the present invention with the idler roller group and the limiting device assembled together.

As shown in Figure 1, and also in Figures 2-10, to address the problem of material spillage occurring when the existing belt conveyor 100 using a trough-type conveying method is unloaded during uphill or downhill conditions, this invention provides a belt conveyor 100. The belt conveyor 100 generally includes a belt 10, multiple idler groups 20, rollers 40, and a tensioning device (not shown in the figures). The belt 10, multiple idler groups 20, rollers 40, and tensioning device are all existing technologies, and their structures will not be described in detail in this embodiment. The belt 10 is typically made of multiple layers of wear-resistant rubber or polymer materials, possessing a certain strength and flexibility to ensure the stability and efficiency of the conveying process. As shown in Figure 2, and also in Figures 3-10, each idler group 20 in the multiple idler groups 20 includes inclined idler rollers 21 on both sides, a horizontal idler roller 22 in the middle, and an idler support 23. The axis of the idler rollers in each idler group 20 is trough-shaped. The trough angle of the inclined idler roller 21 is generally 30 degrees, but 35 degrees, 45 degrees, or even larger angles can be selected, as long as the conveying requirements are met. As shown in Figure 1, taking the belt conveyor 100 going uphill as an example, the belt 10 is divided into a straight section C, a lower arc transition section D, a straight section C, an upper arc transition section E, and a straight section C from bottom to top. Limiting devices 30 are set on both sides of the idler group 20 corresponding to the lower arc transition section D of the belt 10 going uphill or downhill (see Figure 3). The limiting devices 30 are configured to counter-pressure the belt 10 when unloaded, so that the belt 10 is restricted on the idler group 20 to prevent the belt 10 from being pulled up.

As shown in Figures 2 and 7, when belt 10 is running normally, i.e., under load or without tension, the limiting device 30 does not work. See also Figure 1, where belt 10 is in state B, indicating the position of belt 10 under load or without tension. As shown in Figure 1, and also Figures 3 and 8, when unloaded, belt 10 will first flatten when pulled up due to tension, as shown in Figure 1, where belt 10 is in state A, indicating the position of belt 10 under unloaded tension. As shown in Figures 3 and 8, due to the presence of the limiting devices 30 on both sides of the idler roller group 20, belt 10 cannot flatten, meaning belt 10 cannot be pulled up. This prevents belt 10 from leaving the idler roller group 20 even when unloaded, thus achieving the constraint of the limiting device 30 on belt 10 and realizing the downward pressure function of the limiting device 30 on belt 10.

With the above technical solution adopted, referring to Figures 3 and 8, the present invention The belt conveyor 100 adopts a trough-type conveying method. The belt conveyor 100 includes a belt 10, multiple idler roller groups 20 and limiting devices 30. Limiting devices 30 are set on both sides of the idler roller groups 20 at the lower arc transition section D of the belt 10 on the uphill or downhill slope. The limiting devices 30 are configured to back-press the belt 10 when unloaded, so that the belt 10 is restricted on the idler roller groups 20, thereby preventing the belt 10 from being pulled up and thus avoiding the problem of material spillage.

In addition, the limiting device 30 has a simple structure and can effectively constrain the belt 10 without requiring large-scale modifications to the existing structure, thereby reducing material spillage and improving transportation efficiency.

As one possible implementation, as shown in Figure 2 and also in Figures 3-4, the limiting device 30 may include a set of vertical roller assemblies 31. These vertical roller assemblies 31 are positioned near the center of the idler group 20 corresponding to the lower arc transition section D, i.e., near the center of section D in Figure 1. The set of vertical roller assemblies 31 are correspondingly positioned on both sides of the idler group 20. The vertical rollers 321 of the set of vertical roller assemblies 31 are configured to apply counter-pressure to the belt 10, thereby confining the belt 10 to the idler group 20 when unloaded.

As one possible implementation, as shown in Figure 2 and also in Figures 3-4, a set of vertical roller assemblies 31 includes a first vertical roller assembly 32 and a second vertical roller assembly 33. Each vertical roller assembly 31 in the first vertical roller assembly 32 and the second vertical roller assembly 33 includes at least one vertical roller 321. In specific implementations, both the first vertical roller assembly 32 and the second vertical roller assembly 33 may include two vertical rollers 321 and a vertical roller support 323. Of course, in other embodiments, both the first vertical roller assembly 32 and the second vertical roller assembly 33 may include one vertical roller 321, three vertical rollers 321, four vertical rollers 321, or two or more other numbers of vertical rollers 321, as long as the function of the limiting device 30 can be satisfied. The first vertical roller assembly 32 is disposed on one of the inclined rollers 21 on both sides, and the second vertical roller assembly 33 is disposed on the other inclined roller 21 on both sides. In a specific implementation, as shown in Figure 2, the first vertical roller assembly 32 is mounted on the left inclined roller 21, and the second vertical roller assembly 33 is mounted on the right inclined roller 21. Alternatively, referring to Figure 2, the first vertical roller assembly 32 is mounted on the right inclined roller 21, and the second vertical roller assembly 33 is mounted on the left inclined roller 21.

As one possible implementation, as shown in Figure 6 and also in Figure 1, the extension lines of the axis G of all the vertical rollers 321 in the first vertical roller assembly 32 (see Figure 1) and the extension lines of the axis G of all the vertical rollers 321 in the second vertical roller assembly 33 (see Figure 1) intersect with the axis F of the belt 10 corresponding to the lower arc transition section D under load. More specifically, as shown in Figure 4 and also in Figure 6, the first surface 322 formed by the axis of all the vertical rollers in the first vertical roller assembly 32 passes through the axis F of the belt 10 corresponding to the lower arc transition section D under load (see Figure 6). The second surface 331 formed by the axis of all the vertical rollers in the second vertical roller assembly 33 passes through the axis F of the belt 10 corresponding to the lower arc transition section D under load (see Figure 6). This structure ensures that the belt 10 is completely restrained on the idler roller assembly 20 under the action of the limiting device 30.

As one possible implementation, as shown in Figure 6, the limiting device 30 may include multiple sets of vertical roller assemblies 31. The number of sets of vertical roller assemblies 31 may be two or more, such as the three sets shown in Figure 6, or other numbers such as eight, ten, or one hundred sets, depending on the length of the lower arc transition section D and the combined counter-pressure effect. The multiple sets of vertical roller assemblies 31 are spaced apart on the idler group 20 corresponding to the lower arc transition section D. Each set of vertical roller assemblies 31 is correspondingly arranged on both sides of the idler group 20. The vertical rollers 321 of each set of vertical roller assemblies 31 apply counter-pressure to the belt 10, so that the belt 10 is restricted on the idler group 20 when unloaded.

As one possible implementation, as shown in Figure 6, multiple sets of vertical roller assemblies 31 are arranged at equal intervals on the idler group 20 corresponding to the lower arc transition section D. This structure ensures that the entire lower arc transition section D of the belt 10 is uniformly constrained on the idler group 20. For example, if the length of the lower arc transition section D of the belt is 100 meters, a set of vertical roller assemblies 31 can be arranged at 1-meter intervals. Of course, in other embodiments, the intervals can be non-equidistant, and the length of the intervals can also be other values.

As one possible implementation, as shown in FIG2, and also referring to FIG3-FIG4, each of the multiple sets of vertical roller assemblies 31 includes a first vertical roller assembly 32 and a second vertical roller assembly 33. Vertical roller assembly 33. Each vertical roller assembly 31 includes at least one vertical roller 321. In specific implementations, the first vertical roller assembly 32 and the second vertical roller assembly 33 may each include two vertical rollers 321 and one vertical roller support 323. Of course, in other embodiments, the first vertical roller assembly 32 and the second vertical roller assembly 33 may each include one vertical roller 321, three vertical rollers 321, four vertical rollers 321, or two or more other numbers of vertical rollers 321, as long as the function of the limiting device 30 can be satisfied. The first vertical roller assembly 32 is disposed on one of the inclined rollers 21 on both sides, and the second vertical roller assembly 33 is disposed on the other inclined roller 21 on both sides. In specific implementations, as shown in FIG2, the first vertical roller assembly 32 is disposed on the left inclined roller 21, and the second vertical roller assembly 33 is disposed on the right inclined roller 21. Of course, referring to Figure 2, the first vertical roller assembly 32 is mounted on the right inclined roller 21, and the second vertical roller assembly 33 is mounted on the left inclined roller 21.

As one possible implementation, as shown in Figure 6 and also referring to Figure 1, the extension lines of the axes G of all the vertical rollers 321 in the first vertical roller assembly 32 (see Figure 1) intersect the axis F of the belt 10 corresponding to the lower arc transition section D under load. The extension lines of the axes G of all the vertical rollers 321 in the second vertical roller assembly 33 (see Figure 1) intersect the axis F of the belt 10 corresponding to the lower arc transition section D under load. More specifically, as shown in Figure 4 and also referring to Figure 6, the first surface 322 formed by the axes of all the vertical rollers in the first vertical roller assembly 32 passes through the axis F of the belt 10 corresponding to the lower arc transition section D under load (see Figure 6). The second surface 331 formed by the axes of all the vertical rollers in the second vertical roller assembly 33 passes through the axis F of the belt 10 corresponding to the lower arc transition section D under load (see Figure 6). The above structure ensures that the belt 10 is completely restricted to the idler group 20 under the action of the limiting device 30.

In a specific implementation, as shown in Figures 2-6, the vertical roller support 323 in this embodiment is a single arm. As shown in Figures 7-10, the difference between this embodiment and the one in Figures 2-6 is that the vertical roller support 323 in the embodiment shown in Figure 7-10 is a double arm. Of course, in other embodiments, the vertical roller support 323 can also be in other forms, as long as it can stably support the vertical roller.

As one possible implementation, referring to Figure 2, the limiting device 30 includes at least one set of baffle assemblies (not shown in the figure). The at least one set of baffle assemblies is disposed on the lower arc transition section D, and correspondingly disposed on both sides of the idler roller group 20. The baffles of the at least one set of baffle assemblies are configured to apply counter-pressure to the belt 10, thereby restricting the belt 10 to the idler roller group 20 when unloaded. In a specific implementation, the baffle assembly includes a baffle and a baffle bracket. Referring to Figure 2, the vertical roller 321 can be replaced with a baffle. In a specific implementation, the baffle can also be equipped with a self-lubricating material to prevent wear on the edges of the belt 10.

Referring to Figures 1-10, the present invention also provides a conveying method using a belt conveyor, wherein the conveying method employs the belt conveyor 100 described above.

As one possible implementation, the conveying method includes: when the belt 10 of the belt conveyor 100 passes through the downward arc transition section D of an uphill or downhill slope, and under no-load conditions, the belt 10 is counter-pressed by the limiting device 30, so that the belt 10 is restricted to the idler group 20; or,

When the belt 10 of the belt conveyor 100 passes through the lower arc transition section D of the uphill or downhill slope, and under load conditions, the limiting device 30 does not function on the belt 10.

When the above technical solution is adopted, the conveying method of the belt conveyor 100 of the present invention adopts a trough conveying method. The belt conveyor 100 includes a belt 10, multiple idler roller groups 20 and a limiting device 30. The belt 10 is provided with limiting devices 30 on both sides of the idler roller group 20 corresponding to the lower arc transition section D of the uphill or downhill slope. The limiting device 30 is configured to back-press the belt 10 when unloaded, so that the belt 10 is restricted on the idler roller group 20, thereby avoiding the phenomenon of the belt 10 being pulled up, and thus avoiding the problem of material spillage.

The conveying method of the present invention is simple and effective, and can reduce material spillage and improve transportation efficiency.

The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims (10)

A belt conveyor is characterized in that it includes a belt (10) and multiple idler roller groups (20), each idler roller group (20) includes inclined idler rollers (21) on both sides and a horizontal idler roller (22) in the middle, the axis of the idler rollers of each idler roller group (20) is groove-shaped, and the belt (10) is provided with limiting devices (30) on both sides of the idler roller group (20) corresponding to the lower arc transition section of the uphill or downhill slope, the limiting devices (30) are configured to back press the belt (10) when unloaded, so that the belt (10) is restricted on the idler roller group (20) to avoid the phenomenon of the belt (10) being pulled up. According to claim 1, the belt conveyor is characterized in that the limiting device (30) includes a set of vertical roller assemblies (31), the set of vertical roller assemblies (31) is disposed near the center of the idler group (20) corresponding to the lower arc transition section, and the set of vertical roller assemblies (31) is disposed on both sides of the idler group (20), the vertical rollers (321) of the set of vertical roller assemblies (31) are configured to apply counter-pressure to the belt (10), so that the belt (10) is restricted on the idler group (20) when unloaded. According to claim 2, the belt conveyor is characterized in that the set of vertical roller assemblies (31) includes a first vertical roller assembly (32) and a second vertical roller assembly (33), each vertical roller assembly (31) includes at least one vertical roller (321), the first vertical roller assembly (32) is disposed on one of the inclined rollers (21) on both sides, and the second vertical roller assembly (33) is disposed on the other inclined roller (21) on both sides. According to claim 3, the belt conveyor is characterized in that the extended axes of all vertical rollers in the first vertical roller assembly (32) and the extended axes of all vertical rollers in the second vertical roller assembly (33) are aligned with the belt (10) corresponding to the lower arc transition section. The centerlines of the belt (10) intersect under load conditions. According to claim 1, the belt conveyor is characterized in that the limiting device (30) includes multiple sets of vertical roller assemblies (31), the multiple sets of vertical roller assemblies (31) are arranged at intervals on the idler group (20) corresponding to the lower arc transition section, each set of vertical roller assemblies (31) is arranged on both sides of the idler group (20), and the vertical roller (321) of each set of vertical roller assemblies (31) applies a counter pressure to the belt (10), so that the belt (10) is restricted on the idler group (20) when unloaded. According to claim 5, the belt conveyor is characterized in that the multiple sets of vertical roller assemblies (31) are arranged at equal intervals on the idler roller group (20) corresponding to the lower arc transition section. The belt conveyor according to claim 5 is characterized in that each of the multiple sets of vertical roller assemblies (31) includes a first vertical roller assembly (32) and a second vertical roller assembly (33), each vertical roller assembly (31) includes at least one vertical roller (321), the first vertical roller assembly (32) is disposed at one of the inclined rollers (21) on the two sides, and the second vertical roller assembly (33) is disposed at the other of the inclined rollers (21) on the two sides. According to claim 7, the belt conveyor is characterized in that the axial extension lines of all the vertical rollers in the first vertical roller assembly (32) and the axial extension lines of all the vertical rollers in the second vertical roller assembly (33) intersect with the center line of the belt (10) corresponding to the lower arc transition section under load conditions. According to claim 1, the belt conveyor is characterized in that the limiting device (30) includes at least one set of baffle assemblies, the at least one set of baffle assemblies is disposed on the lower arc transition section, and the at least one set of baffle assemblies is correspondingly disposed on two sides of the idler roller group (20). On the side, the baffles of the at least one set of baffle assemblies are configured to apply counter-pressure to the belt (10), such that the belt (10) is restricted on the idler group (20) when unloaded. A conveying method using a belt conveyor, characterized in that the conveying method employs a belt conveyor (100) as described in any one of claims 1-9.