Low profile mobile belt conveyor facilitating tunneling slagging

Abstract

The utility model provides a kind of low profile movable belt conveyor facilitating tunnel slagging, belong to belt conveyor technical field, including multiple belt conveyor monomers, adjacent the belt conveyor monomers can be detached connection, the belt conveyor monomer includes upper frame and lower frame, the upper frame top is equipped with multiple angle adjustable carrier rollers, the carrier roller outside is covered with conveyor belt, the carrier roller is fixedly connected with upper frame by support assembly, the lower frame is fixedly connected in upper frame bottom, the lower frame side is equipped with telescopic slide beam, the lower frame both ends are welded with support leg, the support leg bottom is equipped with adjusting assembly, guide roller is equipped between the telescopic slide beam and lower frame, the utility model uses side frame and roller frame commonly with linear section and curve section, and adopts concave widening connecting piece to pass through gap multistage bending in curve section, without customizing special side frame for curve section, to greatly reduce cost, further improve construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of belt conveyor technology, and in particular relates to a low-profile mobile belt conveyor that facilitates slag removal in tunnels. Background Technology

[0002] In traditional tunnel construction, excavated soil is typically transported from the cutting face to the outside of the tunnel via belt conveyors. The efficiency of excavation end cleaning directly affects construction progress and safety. CN221322415U provides a debris cleaning device for subway tunnel construction, including a vehicle body with a soil hopper for temporary storage. A soil conveying channel is inclined at the front end of the hopper, with its bottom surface flush with the ground. The rear end of the channel is located above the soil hopper and has a vertical guide channel communicating with the inside of the hopper. A conveyor is installed inside the conveying channel, and a motor is mounted on the outer wall of the rear end. The power input of the conveyor is fixedly connected to the output of the motor, and the motor's output passes through both side walls of the conveying channel and is fixedly connected to a drive pulley. However, this device is expensive and its application is limited by environmental constraints, making it less practical and convenient than a mobile belt conveyor.

[0003] Existing mobile conveyor belts typically have high cross-sections, making them difficult to deploy in areas with limited tunnel cross-sections. Furthermore, in curved sections, multiple rigidly connected conveyor belts are prone to misalignment, making it difficult to flexibly follow the tunnel edges. This can lead to conveyor belt deviation, misalignment, or even jamming, requiring shutdown for adjustments in severe cases and impacting construction efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a low-profile mobile belt conveyor that facilitates tunnel muck removal. It uses the same side frame and roller frame for both straight and curved sections, and adopts a concave widening connector to bend through multiple gaps in the curved section, eliminating the need to customize special side frames for the curved section, thereby greatly reducing costs.

[0005] To solve the above problems, this utility model adopts the following technical solution:

[0006] A low-profile mobile belt conveyor for easy muck removal in tunnels includes multiple individual belt conveyor units. Adjacent belt conveyor units are detachably connected. Each belt conveyor unit includes an upper platform and a lower platform. The top of the upper platform is equipped with multiple angle-adjustable idlers, and the outer side of each idler is covered with a conveyor belt. The idlers are fixedly connected to the upper platform via a support assembly. The lower platform is fixedly connected to the bottom of the upper platform. A telescopic sliding beam is mounted on the side of the lower platform. Support legs are welded to both ends of the lower platform. Adjustment components are provided at the bottom of each support leg. A guide roller is installed between the telescopic sliding beam and the lower platform. One end of the guide roller is fixedly connected to the support leg. A return roller is connected to the guide roller. Both the guide roller and the return roller are located on the lower side of the lower platform.

[0007] Furthermore, the support assembly includes a roller support arm and a load-bearing frame, the load-bearing frame being located at the connection between two adjacent rollers, and the roller support arm being located on the outermost side of the plurality of rollers.

[0008] Furthermore, the height of the idler support arm is higher than the height of the support frame, and a plate tilt adjustment bolt is provided at the center of the upper platform. The plate tilt adjustment bolt can adjust the angle of the idler support arm, and the idler located between the idler support arm and the support frame tilts towards the center.

[0009] Furthermore, the idler support arm and the load-bearing frame are made of angle steel, channel steel or square steel, and the load-bearing frame is evenly arranged on the upper platform.

[0010] Furthermore, the adjustment assembly includes a pulley, a leveling bolt, and a support leg base plate. The leveling bolt passes through the pulley and is connected to the support leg, and the support leg base plate is movably connected to the bottom of the support leg.

[0011] Furthermore, a contact plate is hinged to the front end of the telescopic slide beam, and the contact plate is locked to the telescopic slide beam by a pin.

[0012] Furthermore, the upper frame is provided with a pivot support, and the lower frame is provided with a central rotation shaft at its center.

[0013] Furthermore, each conveyor belt unit is equipped with a side frame, and hinge plates are welded onto the side frames of two adjacent conveyor belt units. The adjacent side frames are axially connected through a rotating shaft, and adjusting bolts are inserted between the plates to act as hinges after being locked.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention utilizes the same side frame and roller frame for both straight and curved sections, and employs a concave widening connector for multi-stage bending in curved sections, eliminating the need for custom-made side frames for curved sections and significantly reducing costs. Combined with the tiltable support of the return roller and the adjustable plate tilting platform, the conveyor belt runs more smoothly and reliably on curves. The storage and tail-end frame design allows the transport mileage to automatically extend with tunneling, further improving construction efficiency. It also offers the following advantages:

[0016] The low profile design does not affect the tunnel cross-section clearance, and the outriggers can be installed directly under the roof. Furthermore, the support structure and pulleys can be easily replaced and moved at any time.

[0017] Curve tracking: A pivot connection is set between every two belt conveyors, and the two conveyor heads can follow each other within a range of ±60° on the outside of the curve;

[0018] Rapid deployment: The telescopic sliding beam, in conjunction with the belt conveyor platform, can quickly level and reinforce uneven ground;

[0019] Easy maintenance: Each hinge and sliding connection adopts a standard pin and guide rail block structure, which can be disassembled and assembled on site without special tools. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0022] Figure 2 This is a schematic diagram showing the connection and tilt adjustment of the pivots between two adjacent machine heads.

[0023] In the diagram, 1-conveyor belt; 2-idler; 3-idler support arm; 4-bearing frame; 5-pivot support; 6-plate tilt adjustment bolt; 7-telescopic slide beam; 8-contact plate; 9-guide roller; 10-return roller; 11-support leg; 12-pulley; 13-leveling bolt; 14-support leg base plate; 15-hinge plate; 16-bolt; 17-side frame; 18-upper platform; 19-lower platform; 20-central rotating shaft. Detailed Implementation

[0024] In the description of this utility model, unless otherwise stated, the terms "upper", "lower", "top", "bottom", "longitudinal", etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection or communication within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] To address the problems existing in the prior art, this utility model proposes a low-profile mobile belt conveyor that facilitates muck removal in tunnels, thereby solving the following technical problems:

[0027] (1) Provide a mobile belt conveyor that can adapt to the requirements of low profile tunnels, so as to minimize the total height of belt conveying;

[0028] (2) Solve the problem that multiple belt conveyors cannot turn smoothly in curved sections, so that they can pivot on the outside of the curve and automatically follow the curve, and make the components used in the curved section as interchangeable as possible with those in the straight section, thereby reducing the overall manufacturing and installation costs.

[0029] (3) Provide an adjustable belt conveyor tilt structure to meet the slag discharge requirements of different outlet heights and different inclination angles;

[0030] (4) Improve the ease of on-site assembly, disassembly and relocation, and facilitate rapid deployment and evacuation.

[0031] Specifically, such as Figure 1 , Figure 2As shown, this utility model provides a low-profile mobile belt conveyor for easy muck removal in tunnels, comprising multiple individual belt conveyor units. Adjacent belt conveyor units are detachably connected. Each belt conveyor unit includes an upper platform 18 and a lower platform 19. The top of the upper platform 18 is equipped with multiple angle-adjustable idler rollers 2, and the outer side of the idler rollers 2 is covered with a conveyor belt 1. The idler rollers 2 are fixedly connected to the upper platform 18 through a support assembly. The lower platform 19 is fixedly connected to the bottom of the upper platform 18. The sides of the lower platform 19 are equipped with telescopic sliding beams 7, and support legs 11 are welded to both ends of the lower platform 19. The bottom of the support leg 11 is equipped with an adjustment component. A guide roller 9 is installed between the telescopic slide beam 7 and the lower frame 19. One end of the guide roller 9 is fixedly connected to the support leg 11. The guide roller 9 is connected to the return roller 10. Both the guide roller 9 and the return roller 10 are located on the lower side of the lower frame 19. The upper frame 18 is equipped with a pivot support 5. A rotating shaft or pin is provided in the pivot support 5. The rotating shaft or pin is connected to the adjacent conveyor belt unit. A central rotating shaft 20 is provided at the center of the lower frame 19. One end of the central rotating shaft 20 is usually fixedly connected to the ground or fixedly connected to the adjustable movable base.

[0032] like Figure 2 As shown, each belt conveyor unit is equipped with a side frame 17. Hinges 15 are welded onto the side frames 17 of two adjacent belt conveyor units. The side frames 17 are axially connected through a rotating shaft, and adjusting bolts 16 are inserted between the plates. After being locked, they serve as hinges.

[0033] To facilitate curve adjustment, each conveyor belt unit is equipped with a side frame 17. Hinges 15 are welded onto the side frames 17 of two adjacent conveyor belt units, which are connected axially via a rotating shaft. Adjusting bolts 16 are inserted between the plates and locked to act as hinges. At the same time, the adjusting bolts 16 can be loosened and the pads adjusted to change the relative tilt angle between the two conveyor belt units.

[0034] In this embodiment, the support assembly includes roller support arms 3 and a load-bearing frame 4. The load-bearing frame 4 is located at the connection between two adjacent rollers 2 to form a roller groove. The roller support arms 3 are respectively located on the outermost sides of multiple rollers 2, and the height of the roller support arms 3 is higher than the height of the load-bearing frame 4. The rollers 2 located between the roller support arms 3 and the load-bearing frame 4 are inclined towards the center. The roller support arms 3 and the load-bearing frame 4 are made of angle steel, channel steel, or square steel to prevent excessive swaying. The load-bearing frame 4 is evenly arranged on the upper platform 18. Figure 1 As shown, the outermost two idler rollers 2 are mounted on the higher idler support arm 3, while the other inner idler rollers are mounted on the horizontal plane formed by the bearing frame 4. Thus, on the same upper platform 18, the outermost idler roller 2 has a slightly concave groove towards the center because the height of the support arm 3 is higher than that of the middle bearing frame 4, causing the two sides of the conveyor belt to automatically converge towards the center.

[0035] In this embodiment, a plate tilt adjustment bolt 6 is provided at the center of the upper frame 18. The plate tilt adjustment bolt 6 can adjust the angle of the idler support arm 3. The roller shaft (horizontal shaft) of the idler 2 is fixed between two bearing seats at the top of the idler support arm 3. The bottom of the idler support arm 3 itself is not directly fixed to the upper frame 18, but is connected by a support that can be tilted and rotated, and is affected by the torque of the plate tilt adjustment bolt 6. In specific operation, the plate tilt adjustment bolt 6 can be rotated with a wrench on site so that the bolt hits an inclined surface or bearing pad of the support arm 3, thereby changing the tilt angle of the support arm 3, and thus changing the tilt of the outermost idler 2.

[0036] Specifically, the tilt adjustment bolt 6 is located on the center line of the upper frame 18. The lower end of the tilt adjustment bolt 6 is fixed to the frame base, and the upper end rests against the bottom of the idler support arm 3 or is connected to the idler support arm 3 through a wedge block / shim. When the tilt adjustment bolt 6 is rotated to loosen or tighten, it will change the support height between the tilt adjustment bolt 6 and the idler support arm 3, thereby raising or lowering the outer idler support arm 3. When the tilt bolt 6 is tightened and pushes the idler support arm 3 upward, the support arm 3 is raised as a whole, and the outer idler 2 will tilt more obviously inward (that is, the idler axis tilts towards the center relative to the horizontal direction). When the tilt bolt 6 is loosened, the support arm 3 will drop slightly, and the idler 2 will return to a flatter state.

[0037] In this embodiment, the guide roller 9 and the return roller 10 are connected by a small bracket or hinge. After the guide roller 9 is installed, a rotatable support arm is mounted below the guide roller 9, and the return roller 10 is installed on the support arm. The return side belt first passes the return roller 10 and turns back, and then is further guided by the guide roller 9 and returns to the tail area. The guide roller 9 is fixed on the support leg 11. The guide roller 9 is arranged vertically in the horizontal direction to the longitudinal direction of the belt conveyor unit, and one end is rigidly connected to the support leg 11 through the bracket to maintain a relative fixed point.

[0038] The return roller 10 is hinged or adjustablely connected to the guide roller 9. The return roller 10 is generally mounted on a small rotating bracket (or pin connection) below the guide roller. Specifically, a short support arm is welded below the guide roller 9, and the end of the support arm is equipped with a bearing seat for the return roller 10, so that the return roller 10 can rotate with the support arm and finely adjust the angle. Alternatively, the return roller 10 can be directly hinged to the lower support of the guide roller 10 through a bearing shaft that is coaxial or parallel to the guide roller 9, so as to adjust the tension or turning angle of the return belt. Thus, the guide roller 9 first fixes and guides the return belt, and the return roller 10 is attached to the lower support of the guide roller, playing a second folding role, so that the return side belt is kept in a reasonable loop below the lower frame 19.

[0039] In this embodiment, the adjustment assembly includes a pulley 12, a leveling bolt 13, and a support leg base plate 14. The leveling bolt 13 passes through the pulley 12 and is connected to the support leg 11. The support leg base plate 14 is movably connected to the bottom of the support leg 11. The bottom of the support leg 11 is connected as a whole by the leveling bolt 13, the pulley 12, and the support leg base plate 14. The leveling bolt 13 is provided at the base of the support leg 11 for on-site leveling. The pulley 12 and the support leg base plate 14 can be switched at any time.

[0040] In this embodiment, the pivot support 5 is a component on the upper frame 18 with specially drilled holes or equipped with bearing seats (or sleeves) for inserting a rotating shaft, allowing two adjacent conveyor heads to swing relative to each other around the shaft at an angle within ±60°, thereby achieving curve tracking and bearing torsional and axial forces. When the conveyor head swings along the tunnel curve, the torque and axial force transmitted to the adjacent conveyor head must be borne through the bearing holes / sleeves in the pivot support 5. Therefore, it is not just a simple "fixed connection" but a hinged support point that can bear longitudinal tension and compression as well as allow for angular deflection within a certain range. Thus, the main functions of the pivot support 5 are: to provide axially connected hinged support for two adjacent conveyor units; and to allow relative rotation between the conveyor heads on the curve section through the insertion of a pin, preventing deviation or jamming due to overall rigidity.

[0041] In this embodiment, a contact plate 8 is hinged to the front end of the telescopic sliding beam 7. The contact plate 8 is locked to the telescopic sliding beam 7 by a pin, and the contact plate 8 is in contact with the rock wall.

[0042] In this embodiment, a hole is made or a rotatable central rotation axis 20 is provided in the vertical direction at a position slightly below the center of the lower platform 19. That is, the axis that runs vertically through the center of the lower crossbeam serves as the rotation positioning point between the lower platform 18 and the ground, allowing the entire stand-alone unit to turn slightly around the central rotation axis 20 on the horizontal plane, achieving rapid centering or following curves, while also fixing and supporting the vertical stability of the lower platform.

[0043] One end of the central rotating shaft 20 is usually fastened to the ground or an adjustable movable base (with leveling bolt 13 and pulley 12). When the entire conveyor is installed or needs to be aligned, it can be rotated horizontally with the central rotating shaft 20 as the center to better align with the tunnel direction and adjust the machine body position, so that the overall direction of the conveyor belt is consistent with the tunnel. When the adjusting bolt 16 is loosened in conjunction with the curved section, the direction can be quickly followed. After the machine heads are connected by a hinge structure (pivot support 5 and side frame hinge plate 15), the central rotating shaft 20 of the lower frame 19 serves as the "foundation". Each machine head can maintain a lateral rotation angle by rotating the lower frame 19 around the axis without the need for overall movement, so that the upper conveyor belt follows the curve.

[0044] During installation, place the lower frame 19 in the predetermined position and insert the central rotating shaft 20 to prevent the entire machine from being pulled or pushed longitudinally. During disassembly, pull out the central rotating shaft 20 to lift the entire machine and slide it out longitudinally for easy and quick disassembly.

[0045] This utility model utilizes a telescopic sliding beam 7, fixed at one end and retractable at the other, to achieve rapid adjustment of the belt conveyor length. The conveyor belt 1 is kept taut and forms a support groove by a set of idler rollers 2. A pivot-adjusting bolt structure is used between the main beam and the adjacent machine head, allowing multiple individual belt conveyors to automatically follow the tunnel curve in curved sections. The tilt angle of the entire belt conveyor can be adjusted by changing the relative angle between the hinge plates through the tilt adjustment bolts 16. The leveling bolts 13 support the support legs 11 and perform fine-tuning of their height, ensuring stability on non-planar working surfaces. Its installation and operation methods are as follows:

[0046] (1) Site preparation: The bottom of the tunnel is cleaned and leveled, and the belt conveyor is moved to the corresponding position through pulley 14.

[0047] (2) Positioning of the outriggers: Lift the pulley 14 backwards by 90° and fix it, then lower it onto the outrigger base plates 14 at both ends of the belt conveyor.

[0048] (3) Telescopic positioning: Depending on the distance, the sliding beam 7 is pulled out or retracted to a suitable position so that the contact plate 8 is close to the rock mass, and then the lock nut is locked.

[0049] (4) Curve alignment: On the outside of the curve, loosen the adjusting bolt 16, rotate the adjacent machine head to the required angle along the tunnel curve direction, and tighten and lock it.

[0050] (5) Inclination adjustment: Adjust the angle of the roller support arm 3 according to the height requirement of the slag outlet so that the overall tilt angle of the machine head is 0°~60°, and then lock it again.

[0051] (6) Start the conveyor: Connect the power supply, check the tension of conveyor belt 1 and the operation of idler roller 2, start the belt conveyor, and after observing that the operation is stable, carry out the slag discharge operation.

[0052] (7) Disassembly and removal: After the operation is completed, disassemble each component in reverse order, loosen the contact plate 8, retract the telescopic slide beam 7, loosen and tighten the leveling bolt 13, lift the support leg base plate 14 forward to fix it, and lower the slide wheel 12.

[0053] The present invention has been described in detail above through embodiments, but the content is only a preferred embodiment of the present invention and should not be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A low-profile mobile belt conveyor for easy muck removal in tunnels, characterized in that: The system includes multiple conveyor belt units, which are detachably connected to each other. Each conveyor belt unit includes an upper platform (18) and a lower platform (19). The upper platform (18) has multiple angle-adjustable idlers (2) on its top. The idlers (2) are covered with a conveyor belt (1) on their outer sides. The idlers (2) are fixedly connected to the upper platform (18) via a support assembly. The lower platform (19) is fixedly connected to the bottom of the upper platform (18). The lower platform (19) is equipped with telescopic sliding devices on its sides. The beam (7) has legs (11) welded to both ends of the lower frame (19). The bottom of the legs (11) is provided with an adjustment component. A guide roller (9) is installed between the telescopic sliding beam (7) and the lower frame (19). One end of the guide roller (9) is fixedly connected to the legs (11). The guide roller (9) is connected to a return roller (10). The guide roller (9) and the return roller (10) are both located on the lower side of the lower frame (19). A central rotating shaft (20) is provided at the center of the lower frame (19).

2. The low-profile mobile belt conveyor for easy muck removal in tunnels according to claim 1, characterized in that: The support assembly includes a roller support arm (3) and a load-bearing frame (4). The load-bearing frame (4) is located at the connection between two adjacent rollers (2), and the roller support arm (3) is located on the outermost side of the plurality of rollers (2).

3. The low-profile mobile belt conveyor for easy muck removal in tunnels according to claim 2, characterized in that: The height of the idler support arm (3) is higher than the height of the bearing frame (4). The upper platform (18) is provided with a plate tilt adjustment bolt (6) at the center. The lower end of the plate tilt adjustment bolt (6) is fixedly connected to the base of the upper platform (18). The upper end of the plate tilt adjustment bolt (6) is connected to the bottom of the idler support arm (3). The idler (2) located between the idler support arm (3) and the bearing frame (4) tilts towards the center.

4. A low-profile mobile belt conveyor for easy muck removal in tunnels according to claim 2, characterized in that: The roller support arm (3) and the bearing frame (4) are made of angle steel, channel steel or square steel, and the bearing frame (4) is evenly arranged on the upper platform (18).

5. A low-profile mobile belt conveyor for easy muck removal in tunnels according to claim 1, characterized in that: The adjustment assembly includes a pulley (12), a leveling bolt (13), and a leg base plate (14). The leveling bolt (13) passes through the pulley (12) and is connected to the leg (11). The leg base plate (14) is movably connected to the bottom of the leg (11).

6. A low-profile mobile belt conveyor for easy muck removal in tunnels according to claim 1, characterized in that: The telescopic slide beam (7) has a contact plate (8) hinged to its front end, and the contact plate (8) and the telescopic slide beam (7) are connected and locked together by a pin.

7. A low-profile mobile belt conveyor for easy muck removal in tunnels according to claim 1, characterized in that: The upper frame (18) is provided with a pivot support (5) at the front end of the center line. The pivot support (5) is provided with a rotating shaft or pin, which is connected to the adjacent conveyor belt unit.

8. A low-profile mobile belt conveyor for easy muck removal in tunnels according to any one of claims 1-7, characterized in that: Each conveyor belt unit is provided with a side frame (17). Hinges (15) are welded on the side frames (17) of two adjacent conveyor belt units respectively. The adjacent side frames (17) are connected in the axial direction through a rotating shaft, and adjusting bolts (16) are inserted between the plates. After being locked, they serve as hinges.

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