A special belt turning device for wheel-rail suspended belt conveyors

Abstract

The utility model relates to the field of belt conveyor's belt turnover device, disclose a kind of wheel rail hangs belt conveyor special belt turnover device, including the roller of arrangement in rack end portion, conveying belt passes roller and turns downward, the front portion compression roller frame group, middle compression roller frame group and rear compression roller frame group that conveying belt passes are arranged in the lower portion of rack, and the compression roller of horizontal direction arrangement is respectively equipped in front portion compression roller frame group and rear compression roller frame group, the compression roller in middle compression roller frame group is along vertical surface arrangement, conveying belt is wound on each compression roller;The middle compression roller frame group passes rotary frame.This utility model has the beneficial effects of preventing residual material and the friction and collision abrasion of supporting belt trolley, reducing conveyor return section material throwing pollution, can pass rotary frame, compact structure, conveying belt droop is small, and the device operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of belt turning devices for belt conveyors, and in particular to a special belt turning device for wheel-rail suspended belt conveyors. Background Technology

[0002] Belt conveyors, as core equipment for continuous material transport, are widely used in industrial production. The wheel-rail suspended belt conveyor is a special type of belt conveyor that combines a rail-based system with a flexible suspension structure. Its design breaks through the spatial limitations of traditional belt conveyors and uses a trolley instead of idlers to support the conveyor belt. Cleaning the return section of the wheel-rail suspended belt conveyor mainly relies on a cleaner. However, when conveying sticky or high-moisture materials (such as wet coal, slurry, etc.), the cleaner cannot completely remove residual material adhering to the bearing surface. On the return trip, this bearing surface faces downwards, and some residual material will fall downwards under gravity. Furthermore, this bearing surface will directly rub and collide with the trolley on the return section, resulting in serious spillage and pollution from residual material.

[0003] To solve the above problems, a traditional belt-turning structure can be used to flip the return section conveyor belt so that its bearing surface faces upward and does not directly contact the trolley. However, wheel-rail overhead belt conveyors have a rotating frame for recycling the trolley below, and the belt-turning structure needs to bypass this rotating frame. Since traditional belt conveyors do not have a rotating frame below, their belt-turning structure only needs to flip the return section conveyor belt to avoid contact with the idler roller assembly surface. Therefore, the traditional belt-turning structure cannot bypass the rotating frame. Utility Model Content

[0004] To overcome the problems in the aforementioned background technology, where the bearing surface of the conveyor belt on the return section faces downwards and directly contacts the trolley, resulting in severe spillage and pollution of residual materials, and where traditional belt-turning structures cannot bypass the rotary frame, this utility model provides a special belt-turning device for wheel-rail suspended belt conveyors. This device has the advantages of preventing friction and collision wear between residual materials and the trolley, reducing material spillage and pollution on the return section of the conveyor, being able to bypass the rotary frame, having a compact structure, minimal conveyor belt sagging, and convenient operation and maintenance.

[0005] The technical solution of this utility model is as follows:

[0006] A special belt-turning device for a wheel-rail suspended belt conveyor includes a roller arranged at the end of the frame. The conveyor belt turns downward around the roller. Below the frame, there are a front pressure roller frame group, a middle pressure roller frame group, and a rear pressure roller frame group on which the conveyor belt passes. The front and rear pressure roller frame groups are respectively equipped with horizontally arranged pressure rollers. The pressure rollers in the middle pressure roller frame group are arranged vertically. The conveyor belt is wound around each pressure roller. The middle pressure roller frame group passes around the rotating frame.

[0007] Compared with existing technologies, the beneficial effects of this technical solution are as follows:

[0008] This belt-turning device flips the conveyor belt's bearing surface, allowing it to rotate from face down to face up on the return trip. This prevents residual material from spilling downwards and avoids direct contact with the return trip's trolley, thus preventing serious spillage and contamination from friction and collision. Furthermore, because the central pressure roller frame bypasses the rotary frame, the device can simultaneously flip the conveyor belt and bypass the rotary frame, preventing it from interfering with normal flipping operations. This belt-turning device offers the advantages of preventing friction and collision wear between residual material and the trolley, reducing material spillage and contamination on the return trip, bypassing the rotary frame, and facilitating device operation and maintenance.

[0009] Preferably, the roller includes a redirecting roller and a drive roller, the drive roller drives the conveyor belt, the redirecting roller is located below the drive roller, and the conveyor belt passes around the redirecting roller and the drive roller in an "S" shape.

[0010] Its beneficial effects are: the drive roller drives the conveyor belt and together with the redirecting roller, changes the direction of the conveyor belt, making it easier to flip the conveyor belt using a belt flipping device.

[0011] Preferably, the central pressure roller frame group includes several pressure roller frames arranged around the rotary frame, and the conveyor belt passes through each pressure roller frame and around the rotary frame.

[0012] Its advantages are: this arrangement allows the turning device to bypass the rotary frame, and the pressure roller frames in the middle pressure roller frame group are arranged around the rotary frame, which can reduce its space occupation, make the structure compact, and avoid unnecessary horizontal and vertical space occupation.

[0013] More preferably, the pressure roller frames in the middle pressure roller frame group are located on both sides of the rotary frame, wherein the pressure roller frame on one side of the rotary frame is close to the front pressure roller frame group, and the pressure roller frame on the other side is close to the rear pressure roller frame group; the pressure roller frames on both sides are arranged symmetrically along the center of the rotary frame.

[0014] Its beneficial effects are as follows: the conveyor belt passes through the pressure roller frame on one side of the rotary frame and wraps around the pressure roller frame on the other side. The pressure roller frames on both sides of the rotary frame and the conveyor belt together form a "U"-shaped structure around the rotary frame. This structure can more reasonably avoid the rotary frame and integrate with the rotary frame, making the structure more compact and further reducing the space occupied by the middle pressure roller frame group.

[0015] More preferably, the pressure roller frames on both sides of the rotary frame are provided with two sets, one set of which is equipped with double pressure rollers and the other set is equipped with a single pressure roller.

[0016] Its beneficial effects are as follows: by setting up double pressure rollers, the conveyor belt can pass between the two pressure rollers and is sandwiched between the two pressure rollers, which reduces the tendency of the conveyor belt to fall to a certain extent, and prevents and reduces the jumping of the conveyor belt when entering and exiting the middle pressure roller frame group, so that it can pass through the middle pressure roller frame group smoothly.

[0017] More preferably, the two pressure rollers of the double pressure rollers are arranged diagonally, and the conveyor belt passes between the two pressure rollers; the wrap angle of the single pressure roller is greater than 90°.

[0018] Its beneficial effect is that this setting of the wrap angle can further reduce conveyor belt slippage and slight jumping.

[0019] More preferably, the lower part of the middle pressure roller frame group is also provided with a side support roller group, which is located between the pressure roller frames on both sides of the rotary frame and supports the conveyor belt passing through the pressure roller frames on both sides.

[0020] Its beneficial effects are: the side guard roller assembly can support and lift the conveyor belt that passes through the vertically arranged pressure roller frames on both sides, preventing the conveyor belt from sagging and rubbing or colliding with the pressure roller frames.

[0021] Preferably, the front pressure roller frame group contains one pressure roller; the rear pressure roller frame group contains two pressure rollers, which are arranged vertically.

[0022] Its beneficial effects are as follows: the conveyor belt is laid on the surface of the pressure roller of the front pressure roller frame group and passes over the pressure roller; the conveyor belt first passes through the surface of the pressure roller located at the high position in the rear pressure roller frame group, and then passes through the bottom surface of the pressure roller located at the low position, and finally reaches the trolley of the return section, realizing the flipping of the conveyor belt and reducing the height difference between the conveyor belt at the exit of the rear pressure roller frame and the trolley of the return section.

[0023] Preferably, the pressure roller is fixedly connected to each pressure roller frame via a bearing seat, and the two ends of the roller shaft of the pressure roller extend into the bearing seat respectively, so that the pressure roller can rotate around the roller shaft; the two sides of the bearing seat are fixedly connected to the elongated holes opened in the pressure roller frame by fasteners.

[0024] Its beneficial effects are as follows: the pressure roller can rotate around the roller shaft, and the conveyor belt can drive the pressure roller to rotate when it passes through, reducing the contact friction force when the conveyor belt passes through, and the pressure roller can better support and guide the conveyor belt; the connection method between the bearing seat and the pressure roller frame can adaptably adjust the installation position of the pressure roller on the pressure roller frame, so that the included angle between the pressure rollers can be adjusted, which facilitates the correction of the conveyor belt during operation and maintenance.

[0025] More preferably, the conveyor belt between the front pressure roller frame and the middle pressure roller frame group gradually flips from the horizontal direction to the vertical direction; the conveyor belt between the middle pressure roller frame group and the rear pressure roller frame group gradually flips from the vertical direction to the horizontal direction along the same flipping direction.

[0026] Its beneficial effect is that the conveyor belt is flipped twice in the same clockwise or counterclockwise direction, thus realizing the flipping of the conveyor belt. Attached Figure Description

[0027] This utility model will be described with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a three-dimensional structural diagram of the conveyor belt turning device of this utility model arranged at the head of the frame;

[0029] Figure 2 for Figure 1 A three-dimensional structural diagram of the front and middle pressure roller frame groups, the middle pressure roller frame group, and the rear pressure roller frame group;

[0030] Figure 3 for Figure 2 Enlarged structural diagram of the central pressure roller frame assembly;

[0031] Figure 4 A three-dimensional structural diagram of the belt-turning device of this utility model arranged at the tail of the frame;

[0032] Reference numerals: Frame 1, Roller 11, Redirecting Roller 111, Drive Roller 112, Tractor trolley 12, Conveyor belt 13, Bearing surface 131, Front pressure roller frame group 2, Middle pressure roller frame group 3, Rotary frame 31, Side rail idler roller group 32, Idler roller 33, Rear pressure roller frame group 4, Pressure roller 5, Pressure roller frame 51, Bearing seat 52, Redirecting roller hanger 6. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] Example 1: As Figures 1 to 3 The diagram illustrates a special belt-turning device for a wheel-rail suspended belt conveyor, comprising a roller 11 arranged at the end of the frame 1 of the wheel-rail suspended belt conveyor. A conveyor belt 13, laid on a trolley 12 within the frame 1, reaches the end of the frame 1, wraps around the surface of the roller 11, and extends downwards. Below the frame 1, a front pressure roller frame group 2, a middle pressure roller frame group 3, and a rear pressure roller frame group 4 are arranged, through which the conveyor belt 13 passes in sequence. The front and rear pressure roller frame groups 2 and 4 are respectively equipped with horizontally arranged pressure rollers 5, while the pressure rollers 5 in the middle pressure roller frame group 3 are arranged vertically. The conveyor belt 13 is wound around each pressure roller 5; the middle pressure roller frame group 3 wraps around a rotating frame 31.

[0035] The conveyor belt 13 between the front pressure roller frame 51 and the middle pressure roller frame group 3 gradually flips from the horizontal direction to the vertical direction; the conveyor belt 13 between the middle pressure roller frame group 3 and the rear pressure roller frame group 4 gradually flips from the vertical direction to the horizontal direction along the same flipping direction. The conveyor belt 13 is flipped twice along the same clockwise or counterclockwise direction, thus realizing the flipping of the conveyor belt 13.

[0036] Specifically, the conveyor belt 13, which bypasses the surface of the roller 11, extends downward to the position of the front pressure roller frame 2 and is wound around the pressure roller 5 arranged in its horizontal direction. The conveyor belt 13, which passes through the pressure roller 5, is arranged in the horizontal direction with its bearing surface 131 facing directly downward. The conveyor belt 13 continues to extend forward to the position of the middle pressure roller frame 3 and is wound around the pressure roller 5 arranged in its vertical direction. The conveyor belt 13 that reaches the middle pressure roller frame 3 rotates 90° from the horizontal direction to the vertical direction, with its bearing surface 131 facing the middle pressure roller frame 3. The conveyor belt 13 continues to extend forward to the position of the rear pressure roller frame 4 and is wound around the pressure roller 5 arranged in its horizontal direction. The conveyor belt 13 that reaches the rear pressure roller frame 4 then rotates 90° from the vertical direction to the horizontal direction again, with its bearing surface 131 facing directly upward.

[0037] This belt-turning device flips the bearing surface 131 of the conveyor belt 13, allowing it to rotate from face down to face up on the return section. This prevents residual material from falling downwards and avoids direct contact between the belt and the trolley 12 on the return section, thus preventing serious spillage and contamination from friction and collision. Furthermore, because the central pressure roller frame 3 bypasses the rotary frame 31, the belt-turning device can both flip the conveyor belt 13 and bypass the rotary frame 31, preventing the rotary frame 31 from interfering with its normal flipping operation. This belt-turning device offers the advantages of preventing friction and collision wear between residual material and the trolley, reducing material spillage and contamination on the return section of the conveyor, bypassing the rotary frame 31, and facilitating device operation and maintenance.

[0038] Example 2: Based on Example 1, the upper roller 11 is optimized. The belt turning device is installed below the head of the frame 1. The roller 11 includes a redirecting roller 111 and a drive roller 112. The drive roller 112 drives the conveyor belt 13. The redirecting roller 111 is located diagonally below the drive roller 112. The conveyor belt 13 is arranged in an "S" shape and is wound around the redirecting roller 111 and the drive roller 112 in sequence. That is, the conveyor belt 13 that reaches the head of the frame 1 passes around the upper surface of the drive roller 112 and continues to move downward under the driving force of the drive roller 112 to the redirecting roller 111 diagonally below it. It then passes around the upper surface of the redirecting roller 111 and continues downward, thereby changing the direction of the conveyor belt 13. This facilitates the subsequent use of the belt turning device to turn the conveyor belt 13 over.

[0039] In addition, it should be noted that, as Figure 4 As shown, in the wheel-rail overhead conveyor, the belt-turning device is also arranged at the tail of the frame 1. Therefore, the belt-turning device can also be installed at the tail of the frame 1. In the return section of the conveyor, the conveyor belt 13 installed at the head of the frame 1 is turned from 0° to 180°, that is, the bearing surface 131 of the conveyor belt 13 at this point is turned from face down to face up, avoiding contact between the bearing surface 131 of the conveyor belt 13 and the trolley in the return section. The belt-turning device installed at the tail turns the conveyor belt 13 from 180° to 360°, that is, the bearing surface 131 of the conveyor belt 13 at this point is turned from face down to face up, and the bearing surface 131 of the conveyor belt 13 in the transport section continues to carry materials. In addition, in the return section at the tail of the frame 1, when the conveyor belt 13 reaches the belt-turning device, it passes through the rear pressure roller frame group 4 and the middle pressure roller frame group 3 in sequence, and finally completes the tail belt-turning at the redirecting roller hanger 6.

[0040] Example 3: Based on Example 1, the middle pressure roller frame group 3 is optimized. The middle pressure roller frame group 3 includes several pressure roller frames 51 arranged around the rotary frame 31. The conveyor belt 13 passes through each pressure roller frame 51 and goes around the rotary frame 31. This arrangement allows the belt turning device to go around the rotary frame 31. Moreover, the pressure roller frames 51 in the middle pressure roller frame group 3 are arranged around the rotary frame 31, which can reduce its space occupation, make the structure compact, and avoid unnecessary horizontal and vertical space occupation.

[0041] Specifically, pressure roller frames 51 are provided on both sides of the rotary frame 31. One side of the pressure roller frame 51 is close to the front pressure roller frame group 2, and the other side of the pressure roller frame 51 is close to the rear pressure roller frame group 4. The pressure roller frames 51 on both sides are symmetrically arranged along the center of the rotary frame 31. The conveyor belt 13 passes through the pressure roller frame 51 on one side of the rotary frame 31 and wraps around the pressure roller frame 51 on the other side. The pressure roller frames 51 on both sides of the rotary frame 31 and the conveyor belt 13 together form a "U" shaped structure around the rotary frame 31. This structure can more reasonably avoid the rotary frame 31 and is integrated with the rotary frame 31, making the structure more compact and further reducing the space occupied by the middle pressure roller frame group 3.

[0042] Preferably, the pressure roller frames 51 on both sides of the rotary frame 31 are provided in two sets. One set of the two sets of pressure roller frames 51 on each side is equipped with double pressure rollers (i.e., two pressure rollers 5) and the other set is equipped with a single pressure roller (i.e., one pressure roller 5). The two pressure rollers 5 in the double pressure roller set are arranged diagonally opposite each other in the corresponding pressure roller frame 51, and the double pressure rollers are located at the inlet and outlet positions of the conveyor belt 13 in the middle pressure roller frame group 3. The conveyor belt 13 passes between the two pressure rollers 5. By setting double pressure rollers, the conveyor belt 13 can pass between the two pressure rollers 5, and the conveyor belt 13 is sandwiched between the two pressure rollers 5, which reduces the tendency of the conveyor belt 13 to fall to a certain extent, and prevents and reduces the jumping of the conveyor belt 13 when entering and exiting the middle pressure roller frame group 3, so that it can pass smoothly through the middle pressure roller frame group 3. In addition, the arrangement and angle of the two sets of idler rollers 33 on each side of the rotary frame 31 should ensure that the wrap angle of the single pressure roller is greater than 90°, that is, the angle formed by the conveyor belt 13 around the single pressure roller is greater than 90°. This angle setting can further reduce the slippage and slight jumping of the conveyor belt 13.

[0043] When the conveyor belt 13 passes through the middle pressure roller frame group 3, it first passes through the pressure roller frame 51 on the side of the rotary frame 31 closest to the front pressure roller frame group 2, that is, through the pressure roller frame 51 on this side where two pressure rollers 5 are installed. The conveyor belt 13 passes between the two pressure rollers 5 and enters the middle pressure roller frame group 3. Then, it winds around the pressure roller frame 51 on this side where one pressure roller 5 is installed in an "S" shape, and passes around the pressure roller 5. Then, it winds around the pressure roller frame 51 on the other side from the front of the rotary frame 31 and passes through the pressure roller frame 51 on this side. That is, the conveyor belt 13 passes through the pressure roller frame 51 on this side where one pressure roller 5 is installed, and passes around the pressure roller 5. Then, it winds around the pressure roller frame 51 on this side where two pressure rollers 5 are installed in an "S" shape, and passes between the two pressure rollers 5, exiting the middle pressure roller frame group 3. In this way, the middle pressure roller frame group 3 can reasonably avoid the rotary frame 31, and the conveyor belt 13 can simultaneously complete the rotation from horizontal to vertical.

[0044] Example 4: Based on Example 3, the design of the middle pressure roller frame group 3 is further optimized. The lower part of the middle pressure roller frame group 3 is also provided with a side roller group 32. The side roller group 32 is located between the pressure roller frames 51 on both sides of the rotary frame 31, that is, between the two pressure roller frames 51 on which a single pressure roller is installed. The bottom edge of the conveyor belt 13 directly contacts the rollers 33 on the side roller group 32. The side roller group 32 can support and lift the vertically arranged conveyor belt 13 that passes through the pressure roller frames 51 on both sides, avoiding the conveyor belt 13 from sagging and rubbing and colliding with the pressure roller frames 51. In addition, the rollers 33 in the side roller group 32 are arranged along the extension direction of the conveyor belt 13. The length direction of each roller 33 is perpendicular to the surface of the conveyor belt 13. When the conveyor belt 13 moves, it can drive the rollers 33 to rotate, reducing the friction between the two.

[0045] Example 5: Based on Example 1, the front pressure roller frame 51 and the rear pressure roller frame 51 are optimized. The pressure roller 5 in the front pressure roller frame group 2 is a single roller, and the conveyor belt 13 is laid on the surface of the pressure roller 5 and passes through the surface of the pressure roller 5. The pressure roller 5 in the rear pressure roller frame group 4 is two rollers, arranged vertically. One pressure roller 5 is located on one side of the rear pressure roller frame 51, and the other pressure roller 5 is located on the opposite side of the rear pressure roller frame 51. The conveyor belt 13 first passes through the surface of the pressure roller 5 located at the higher position, then passes through the bottom surface of the pressure roller 5 located at the lower position, and finally reaches the trolley 12 of the return section, realizing the flipping of the conveyor belt 13 and reducing the height difference between the conveyor belt 13 at the exit of the rear pressure roller frame 51 and the trolley 12 of the return section.

[0046] Example 6: Based on Example 1, the front pressure roller frame 51 is optimized. The pressure roller 5 is fixedly connected to each pressure roller frame 51 (i.e., each pressure roller frame 51 in the front pressure roller frame group 2, the middle pressure roller frame group 3, and the rear pressure roller frame group 4) through bearing seats 52. The pressure roller frame 51 is a rectangular steel frame structure composed of several horizontal and vertical bars fixedly connected. The two ends of the roller shaft of the pressure roller 5 extend into the bearing seats 52 respectively. The pressure roller 5 can rotate around the roller shaft. When the conveyor belt 13 passes through, it can drive the pressure roller 5 to rotate, reducing the contact friction force when the conveyor belt 13 passes through. The pressure roller 5 can better support and guide the conveyor belt 13.

[0047] The bearing seats 52 are fixedly connected to the elongated holes in the pressure roller frame 51 by fasteners on both sides. These fasteners include bolts and nuts, spring washers, and flat washers that mate with the bolts. This connection method allows for adaptive adjustment of the installation position of the pressure rollers 5 on the pressure roller frame 51, making the included angle between the pressure rollers 5 adjustable, facilitating the correction of the conveyor belt 13 during operation and maintenance. The pressure rollers 5 in the front pressure roller frame group 2 are installed on the top of the pressure roller frame 51. The bearing seats 52 at both ends of the pressure rollers 5 can be adjusted to connect with the elongated holes inside the pressure roller frame 51 (on both sides of the top perpendicular to the running direction of the conveyor belt 13), thus allowing them to move forward along the running direction of the conveyor belt 13. The tilt angle of the pressure roller 5 is adjusted laterally; the pressure roller 5 in the middle pressure roller frame group 3 is installed on the side of each pressure roller frame 51, and the bearing seats 52 at both ends of the pressure roller 5 can be adjusted to connect with the elongated holes on the upper and lower sides of the pressure roller frame 51, so that the tilt angle of the pressure roller 5 can be adjusted left and right along the running direction of the conveyor belt 13 (with the direction of the running direction of the conveyor belt 13 as the front); the pressure roller 5 in the rear pressure roller frame group 4 is installed on the front and rear sides of each pressure roller frame 51 in the transport direction of the conveyor belt 13, and the bearing seats 52 at both ends of the pressure roller 5 can be adjusted to connect with the elongated holes on the two sides of the aforementioned side, so that the tilt angle of the pressure roller 5 can be adjusted up and down in the vertical plane.

[0048] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the technical solution of this application, and these all fall within the scope of protection of this application.

Claims

1. A special belt-turning device for a wheel-rail suspended belt conveyor, comprising a roller (11) arranged at the end of the frame (1), wherein the conveyor belt (13) turns downward around the roller (11), characterized in that: Below the frame (1) are arranged a front pressure roller frame group (2), a middle pressure roller frame group (3) and a rear pressure roller frame group (4) through which the conveyor belt (13) passes. The front pressure roller frame group (2) and the rear pressure roller frame group (4) are respectively provided with horizontally arranged pressure rollers (5). The pressure rollers (5) in the middle pressure roller frame group (3) are arranged along the vertical plane. The conveyor belt (13) is wound around each pressure roller (5). The middle pressure roller frame group (3) passes around the rotary frame (31).

2. The special belt-turning device for a wheel-rail suspended belt conveyor according to claim 1, characterized in that: The roller (11) includes a redirecting roller (111) and a drive roller (112). The drive roller (112) drives the conveyor belt (13). The redirecting roller (111) is located below the drive roller (112). The conveyor belt (13) passes around the redirecting roller (111) and the drive roller (112) in an "S" shape.

3. The special belt-turning device for a wheel-rail suspended belt conveyor according to claim 1, characterized in that: The central pressure roller frame group (3) includes several pressure roller frames (51) arranged around the rotary frame (31), and the conveyor belt (13) passes through and around the rotary frame (31) from each pressure roller frame (51).

4. A special belt-turning device for a wheel-rail suspended belt conveyor according to claim 3, characterized in that: The pressure roller frames (51) in the middle pressure roller frame group (3) are located on both sides of the rotary frame (31). The pressure roller frame (51) on one side of the rotary frame (31) is close to the front pressure roller frame group (2), and the pressure roller frame (51) on the other side is close to the rear pressure roller frame group (4). The pressure roller frames (51) on both sides are arranged symmetrically along the center of the rotary frame (31).

5. A special belt-turning device for a wheel-rail suspended belt conveyor according to claim 4, characterized in that: The rotary frame (31) has two sets of pressure roller frames (51) on both sides. One set of the two sets of pressure roller frames (51) is equipped with double pressure rollers, and the other set is equipped with a single pressure roller.

6. A special belt-turning device for a wheel-rail suspended belt conveyor according to claim 5, characterized in that: The two pressure rollers (5) of the double pressure roller are arranged diagonally, and the conveyor belt (13) passes between the two pressure rollers (5); the wrap angle of the single pressure roller is greater than 90°.

7. A special belt-turning device for a wheel-rail suspended belt conveyor according to claim 4, characterized in that: The lower part of the middle pressure roller frame group (3) is also provided with a side support roller group (32). The side support roller group (32) is located between the pressure roller frames (51) on both sides of the rotary frame (31) and supports the conveyor belt (13) passing through the pressure roller frames (51) on both sides.

8. A special belt-turning device for a wheel-rail suspended belt conveyor according to claim 1, characterized in that: The front pressure roller frame group (2) contains one pressure roller (5); the rear pressure roller frame group (4) contains two pressure rollers (5), which are arranged vertically.

9. A special belt-turning device for a wheel-rail suspended belt conveyor according to claim 1, characterized in that: The pressure roller (5) is fixedly connected to each pressure roller frame (51) through the bearing seat (52). The two ends of the roller shaft of the pressure roller (5) extend into the bearing seat (52) respectively, and the pressure roller (5) can rotate around the roller shaft. The two sides of the bearing seat (52) are fixedly connected to the elongated holes opened in the pressure roller frame (51) through fasteners.

10. A special belt-turning device for a wheel-rail suspended belt conveyor according to any one of claims 1-9, characterized in that: The conveyor belt (13) between the front pressure roller frame (51) and the middle pressure roller frame group (3) gradually flips from the horizontal direction to the vertical direction; the conveyor belt (13) between the middle pressure roller frame group (3) and the rear pressure roller frame group (4) gradually flips from the vertical direction to the horizontal direction along the same flipping direction.

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