Telescopic belt conveyor

Abstract

The application relates to a telescopic belt conveying device, a device body, a traction mechanism and a tail assembly are sequentially and spacedly arranged, a first steel wire rope group and a second steel wire rope group are both spacedly wound on the traction mechanism, the first steel wire rope group and the second steel wire rope group are both connected with the device body, a telescopic conveying belt is rotationally connected with the device body, the device body can drive the telescopic conveying belt to rotate, the telescopic conveying belt is rotationally connected with the tail assembly, the first steel wire rope group and the second steel wire rope group are both slidably matched with a belt supporting assembly, and the belt supporting assembly supports the telescopic conveying belt. The above scheme can solve the problem that workers need to lay a supporting bracket to follow up the extension of the telescopic conveying belt, the installation efficiency of the workers is reduced due to the small width of the tunneling roadway and other unfavorable factors, the lap distance of the supporting bracket cannot meet the tunneling footage of the tunneling machine, and the work efficiency of coal mining is affected.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and in particular to a retractable belt conveyor. Background Technology

[0002] Belt conveyors are the main mode of transportation in coal mines, solving the problem of continuous and large-volume coal transportation. However, in the mining process, especially for tunneling teams, the transportation of auxiliary materials accounts for a large proportion, which is generally accomplished using trackless rubber-tired vehicles or rail transport.

[0003] However, in actual mine production, during the tunneling process, the conveyor body needs to be gradually extended as the tunneling depth increases. Specifically, the telescopic conveyor belt needs to be extended gradually. Simultaneously, workers need to lay support frames to support the extension of the telescopic conveyor belt. For example, existing telescopic belt conveyor frames use 3-meter legs as a set, and longitudinal beams are made of 3-meter sections of round pipe or channel steel, installed between two legs. The legs and longitudinal beams are laid along the entire length. The upper idler rollers are installed on the longitudinal beams, and the lower idler rollers are installed on the legs. The current method of laying legs and longitudinal beams along the entire length of the telescopic belt conveyor body results in high steel consumption and cost. Furthermore, the workload of installing and dismantling the conveyor body as the working face advances is large, leading to low efficiency. It is evident that factors such as the narrow width of the tunneling roadway further reduce the efficiency of the workers' installation, resulting in the workers' inability to meet the tunneling advance requirements of the support frames, thus affecting the efficiency of coal mining operations. Summary of the Invention

[0004] Based on this, a retractable belt conveyor is provided to solve the problem that workers need to lay support brackets to keep up with the extension of the retractable conveyor belt. However, there are disadvantages such as the narrow width of the tunnel, which reduces the installation efficiency of workers. As a result, the overlapping stroke of the support brackets by workers usually cannot meet the tunneling advance of the tunneling machine, thus affecting the efficiency of coal mining.

[0005] A retractable belt conveyor includes a main body, a retractable conveyor belt, a belt support assembly, a traction mechanism, a tail assembly, a first wire rope group, and a second wire rope group. Along a first direction, the main body, the traction mechanism, and the tail assembly are arranged sequentially at intervals. One end of each of the first and second wire rope groups is wound at intervals around the traction mechanism. The traction mechanism can drive both the first and second wire rope groups to shorten or extend. The other ends of both the first and second wire rope groups are connected to the main body. Along the direction of gravity, the second wire rope group and the first wire rope group are spaced apart. One end of the telescopic conveyor belt is rotatably connected to the main body of the equipment, and the main body of the equipment can drive the telescopic conveyor belt to rotate. The other end of the telescopic conveyor belt is rotatably connected to the tail assembly. Both the first wire rope group and the second wire rope group are slidably engaged with the belt support assembly. The belt support assembly supports the telescopic conveyor belt and is located between one end of the first wire rope group and the other end of the first wire rope group. The first direction intersects the direction of gravity.

[0006] Preferably, in the above-mentioned retractable belt conveyor, the main body of the device includes a head drive assembly, a belt tensioning assembly, and a belt take-up and release assembly. Along the first direction, the head drive assembly, the belt tensioning assembly, the belt take-up and release assembly, the traction mechanism, and the tail assembly are arranged sequentially at intervals. One end of the retractable conveyor belt is rotatably connected to the belt take-up and release assembly. Both the head drive assembly and the belt tensioning assembly are rotatably engaged with the retractable conveyor belt. The head drive assembly can drive the retractable conveyor belt to rotate. The belt take-up and release assembly can control the retractable conveyor belt to shorten or lengthen. The belt tensioning assembly can tension the portion of the retractable conveyor belt that is rotatably engaged with it.

[0007] Preferably, in the above-mentioned retractable belt conveyor, the belt support assembly includes an upper idler assembly and a lower idler assembly. The first wire rope group is slidably engaged with the upper idler assembly, and the second wire rope group is slidably engaged with the lower idler assembly. The upper idler assembly and the lower idler assembly are arranged sequentially along the direction of gravity, and both the upper idler assembly and the lower idler assembly support the retractable conveyor belt.

[0008] Preferably, in the above-mentioned retractable belt conveyor, there are multiple belt support components, and the first wire rope group and the second wire rope group are slidably engaged with the multiple belt support components. Along the first direction, the multiple belt support components are arranged at intervals in sequence.

[0009] Preferably, the above-mentioned retractable belt conveyor further includes a quick-assembly unit bracket, which supports the first wire rope group and the second wire rope group, and is located between the main body of the equipment and the traction mechanism.

[0010] Preferably, in the above-mentioned retractable belt conveyor, the traction mechanism includes a frame, a second drive motor, a third drive motor, a first winch assembly, and a second winch assembly. The second drive motor and the third drive motor are both mounted on the frame. The second winch assembly and the first winch assembly are rotatably connected to the frame. The second drive motor and the first winch assembly are driven by a first transmission belt assembly. One end of the first wire rope assembly is wound around the first winch assembly. The third drive motor and the second winch assembly are driven by a second transmission belt assembly. One end of the second wire rope assembly is wound around the second winch assembly.

[0011] Preferably, in the above-mentioned retractable belt conveyor, the traction mechanism further includes a control module, a first drive motor, a roller assembly, and a hydraulic support assembly. The roller assembly is rotatably connected to one end of the frame, the hydraulic support assembly is disposed at one end of the frame, and the control module and the first drive motor are disposed at the other end of the frame, wherein one end of the frame and the other end of the frame are opposite to each other. The first drive motor is connected to the roller assembly and can drive the roller assembly to rotate relative to the frame. The control module is electrically connected to the hydraulic support assembly and can control the hydraulic support assembly to switch between a leveling state and a retracted state. When the control module controls the hydraulic support assembly to be in the leveling state, the hydraulic support assembly supports the frame; when the control module controls the hydraulic support assembly to be in the retracted state, the roller assembly supports the frame.

[0012] Preferably, in the above-mentioned retractable belt conveyor, the frame includes a first sub-frame and a second sub-frame, the roller assembly includes a drive roller assembly, a driven roller assembly, a transmission shaft, and an auxiliary roller assembly, the first sub-frame and the second sub-frame are hingedly connected, the drive roller assembly and the driven roller assembly are rotatably connected to the first sub-frame, the first drive motor is disposed on the first sub-frame and meshes with the drive roller assembly, the drive roller assembly meshes with one end of the transmission shaft, the other end of the transmission shaft meshes with the driven roller assembly, the auxiliary wheel is rotatably connected to the second sub-frame, there are multiple hydraulic support assemblies, a portion of the multiple hydraulic support assemblies are distributed around the periphery of the first sub-frame, another portion of the multiple hydraulic support assemblies are distributed around the periphery of the second sub-frame, the control module is disposed on the first sub-frame, and the control module is electrically connected to the multiple hydraulic support assemblies.

[0013] Preferably, in the above-mentioned retractable belt conveyor, the first sub-frame and the second sub-frame are hinged together. Near the hinge, a first upper limit switch and a first lower limit switch are provided on the first sub-frame, and a second upper limit switch and a second lower limit switch are provided on the second sub-frame. The first upper limit switch, the first lower limit switch, the second upper limit switch, and the second lower limit switch are flexibly connected to the first sub-frame and the second sub-frame.

[0014] The technical solution adopted in this application can achieve the following beneficial effects:

[0015] In the retractable belt conveyor disclosed in this application, during the assembly process, the main body, traction mechanism, and tail assembly are sequentially spaced along a first direction. When the main body moves to the working position, one end of the retractable conveyor belt is rotatably connected to the main body, allowing the main body to drive the retractable conveyor belt to rotate. The other end of the retractable conveyor belt is rotatably connected to the tail assembly. The other ends of both the first and second wire rope groups are connected to the main body. The traction mechanism drives both the first and second wire rope groups to shorten or lengthen, ensuring both are under tension. The main body is traction-driven by the first and second wire rope groups. Connected to the traction mechanism, both the first and second wire rope groups slide in cooperation with the support assembly. Both groups provide support to the support assembly, which in turn supports the telescopic conveyor belt, ensuring its stable rotation. This assembly process avoids the time-consuming and labor-intensive task of laying support brackets between the main body and the tail assembly. Furthermore, the structure, using the first and second wire rope groups and the support assembly to support the telescopic conveyor belt, is simple to install and requires minimal work. This ensures that the overlap stroke of the belt conveyor assembly meets the tunneling machine's advance, thereby improving the efficiency of coal mining. Quick-installation unit supports are arranged according to the conveyor parameters and roadway layout. These supports are equipped with wire rope clamping devices to support the first and second wire rope groups. The upper and lower idler roller assembly ends are equipped with clamping devices for quick fixation to the first and second wire rope groups, offering quick installation and removal capabilities. The traction mechanism can advance along with the working face, and can release and retract the rope to extend or shorten the machine body. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of the retractable belt conveyor disclosed in an embodiment of this application at a certain angle;

[0017] Figure 2 This is a partial structural schematic diagram of the retractable belt conveyor disclosed in an embodiment of this application from another angle;

[0018] Figure 3 This is a schematic diagram of the traction mechanism disclosed in an embodiment of this application at one angle;

[0019] Figure 4 This is a schematic diagram of the traction device disclosed in the embodiments of this application from another angle;

[0020] Figure 5 This is a top view of the traction device disclosed in the embodiments of this application;

[0021] Figure 6This is a bottom view of the traction device disclosed in the embodiments of this application;

[0022] Figure 7 This is a front view of the traction device disclosed in the embodiments of this application;

[0023] Figure 8 This is a left view of the traction device disclosed in the embodiments of this application;

[0024] Figure 9 This is a schematic diagram illustrating the usage state of the invention. The diagram shows the overall connection of the conveyor. In the diagram, A1 and A2 are connected, B1 and B2 are connected, and C1 and C2 are connected.

[0025] Figure 10 : A simplified schematic diagram of the original design structure of the small support rollers of the first subframe 111 and the second subframe 112 in the case of a sunken ground;

[0026] Figure 11 : Figure 10 A simplified schematic diagram of the improved limit switch.

[0027] The components include: frame 110, first sub-frame 111, first upper limit switch 1111, first lower limit switch 1112, small support roller 1113, second sub-frame 112, second upper limit switch 1121, second lower limit switch 1122, first drive motor 120, roller assembly 130, drive roller assembly 131, driven roller assembly 132, drive shaft 133, auxiliary roller assembly 134, hydraulic support assembly 140, second drive motor 151, third drive motor 152, first winch assembly 153, and second winch assembly 154. The following components are included: third winch group 161, fourth winch group 162, third wire rope group 163, fourth wire rope group 164, wire rope locking assembly 170, belt support assembly 181, belt lifting assembly 182, main body of equipment 200, head drive assembly 210, belt storage tensioning assembly 220, belt take-up and release assembly 230, telescopic conveyor belt 300, belt support assembly 400, upper idler assembly 410, lower idler assembly 420, tail assembly 500, first wire rope group 610, second wire rope group 620, and quick-assembly unit bracket 700. Implementation

[0028] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0029] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please refer to Figures 1 to 11 This application discloses a retractable belt conveyor, which includes a main body 200, a retractable conveyor belt 300, a belt support assembly 400, a traction mechanism, a tail assembly 500, a first wire rope group 610, and a second wire rope group 620.

[0032] The telescopic conveyor belt 300 is a conveying component of the telescopic belt conveyor, and the traction mechanism is a traction component of the telescopic belt conveyor. The tail assembly 500 mainly consists of guide rollers, a cleaning device, guard plates, and a tail frame. Upper and lower idlers are mounted on the tail frame. The position of the guide rollers can be adjusted forward and backward using adjusting bolts on the bearing seats to adjust the belt tension. The guard plates prevent coal from falling onto the return section during loading. The cleaning device removes loose coal spilled onto the return section belt along the way. The tail assembly 500 is existing technology and will not be described in detail here.

[0033] Specifically, along the first direction, the equipment body 200, the traction mechanism, and the tail assembly 500 are arranged sequentially at intervals. One end of the first wire rope group 610 and one end of the second wire rope group 620 are both wound around the traction mechanism at intervals. The traction mechanism can drive both the first wire rope group 610 and the second wire rope group 620 to shorten or lengthen. The other end of the first wire rope group 610 and the other end of the second wire rope group 620 are both connected to the equipment body 200. Along the gravity direction, the second wire rope group 620 and the first wire rope group 610 are arranged at intervals. One end of the telescopic conveyor belt 300 is rotatably connected to the main body 200 of the equipment, and the main body 200 can drive the telescopic conveyor belt 300 to rotate. The other end of the telescopic conveyor belt 300 is rotatably connected to the tail assembly 500. The first wire rope group 610 and the second wire rope group 620 are both slidably engaged with the support assembly 400. The support assembly 400 supports the telescopic conveyor belt 300 and is located between one end of the first wire rope group 610 and the other end of the first wire rope group 610. The first direction intersects with the direction of gravity.

[0034] In the mine roadway, during the assembly of the retractable belt conveyor, along the first direction, the main body 200, traction mechanism, and tail assembly 500 are sequentially spaced. When the main body 200 moves to the working position, one end of the retractable conveyor belt 300 is rotatably connected to the main body 200, allowing the main body 200 to drive the retractable conveyor belt 300 to rotate. The other end of the retractable conveyor belt 300 is rotatably connected to the tail assembly 500. The other ends of the first wire rope group 610 and the second wire rope group 620 are both connected to the main body 200. The traction mechanism drives both the first wire rope group 610 and the second wire rope group 620 to shorten or lengthen, ensuring both are under tension. The main body 200 is assisted by the first wire rope group 610 and the second wire rope group 620. Connected to the traction mechanism, the first wire rope group 610 and the second wire rope group 620 are both slidably engaged with the support assembly 400. Both the first wire rope group 610 and the second wire rope group 620 can provide support for the support assembly 400, which supports the telescopic conveyor belt 300 so that the telescopic conveyor belt 300 can rotate stably. The above assembly process can avoid the time-consuming and labor-intensive task of laying support brackets between the main body 200 and the tail assembly 500. At the same time, the above structure supports the telescopic conveyor belt 300 through the first wire rope group 610, the second wire rope group 620 and the support assembly 400, which is simple to install and requires less work. This ensures that the overlapping stroke of the belt conveyor can meet the tunneling advance of the tunneling machine, thereby improving the efficiency of coal mining.

[0035] In this embodiment, the main body 200 may include a head drive assembly 210, a belt tensioning assembly 220, and a belt take-up and release assembly 230.

[0036] Specifically, along the first direction, the head drive assembly 210, belt tensioning assembly 220, belt take-up and release assembly 230, traction mechanism, and tail assembly 500 are arranged sequentially at intervals. One end of the telescopic conveyor belt 300 is rotatably connected to the belt take-up and release assembly 230. Both the head drive assembly 210 and the belt tensioning assembly 220 are rotatably engaged with the telescopic conveyor belt 300. The head drive assembly 210 can drive the telescopic conveyor belt 300 to rotate, the belt take-up and release assembly 230 can control the shortening or lengthening of the telescopic conveyor belt 300, and the belt tensioning assembly 220 can tension the portion of the telescopic conveyor belt 300 that is rotatably engaged with it. The above structure ensures that when the telescopic conveyor belt 300 follows the tunneling advance of the tunneling machine, the tension of the telescopic conveyor belt 300 can be maintained after shortening or lengthening.

[0037] In this embodiment, the support assembly 400 may include an upper idler assembly 410 and a lower idler assembly 420. Specifically, a first wire rope group 610 is slidably engaged with the upper idler assembly 410, and a second wire rope group 620 is slidably engaged with the lower idler assembly 420. The upper idler assembly 410 and the lower idler assembly 420 are arranged sequentially along the direction of gravity. Both the upper idler assembly 410 and the lower idler assembly 420 support the telescopic conveyor belt 300, thereby ensuring that both the upper and lower ends of the telescopic conveyor belt 300 are supported along the direction of gravity. At the same time, the upper idler assembly 410 and the lower idler assembly 420 can also tension the telescopic conveyor belt 300.

[0038] In a further technical solution, there can be multiple support assemblies 400. Specifically, the first wire rope group 610 and the second wire rope group 620 are both slidably engaged with multiple support assemblies 400. Along the first direction, the multiple support assemblies 400 are arranged sequentially at intervals, thereby ensuring that the portion of the telescopic conveyor belt 300 between the equipment body 200 and the traction mechanism receives more support, thus further improving the rotational stability of the telescopic conveyor belt 300. Of course, there can be multiple support assemblies 400, and multiple upper idler roller assemblies 410 and lower idler roller assemblies 420.

[0039] In addition, the upper idler assembly 410 may be provided with a first locking device, and the lower idler assembly 420 may be provided with a second locking device. The first locking device can be locked in place with the first wire rope group 610, and the second locking device can be locked in place with the second wire rope group 620.

[0040] In this embodiment, the retractable belt conveyor may further include a quick-release unit bracket 700. Specifically, the quick-release unit bracket 700 supports the first wire rope group 610 and the second wire rope group 620. The quick-release unit bracket 700 is located between the main body 200 and the traction mechanism. In the above structure, the quick-release unit bracket can provide rigid structural support for the first wire rope group 610 and the second wire rope group 620, preventing the first wire rope group 610 and the second wire rope group 620 from breaking due to excessive load, and also facilitates quick disassembly and assembly by the staff.

[0041] In addition, there can be multiple quick-assembly unit brackets 700, which can be spaced apart and located between the main body 200 and the traction mechanism. Each quick-assembly unit bracket 700 supports the first wire rope group 610 and the second wire rope group 620. Of course, each quick-assembly unit bracket 700 can be equipped with a wire rope clamp to ensure the tension effect of the first wire rope group 610 and the second wire rope group 620.

[0042] In this embodiment, the traction mechanism may include a frame 110, a second drive motor 151, a third drive motor 152, a first winch assembly 153, and a second winch assembly 154. Specifically, the second drive motor 151 and the third drive motor 152 are both mounted on the frame 110. The second winch assembly 153 and the first winch assembly 154 are rotatably connected to the frame 110. The second drive motor 151 and the first winch assembly 153 are driven by a first transmission belt assembly. One end of the first wire rope assembly 610 is wound around the first winch assembly 153, so that the second drive motor 151 drives the first winch assembly 153 via the first transmission belt. The rotation of a winch assembly 153 enables the retraction or extension of the first wire rope assembly 610. The third drive motor 152 and the second winch assembly 154 are driven by a second transmission belt assembly. One end of the second wire rope assembly 620 is wound around the second winch assembly 154 so that the second wire rope assembly 620 is retracted or extended by the third drive motor 152 driving the second winch assembly 154 through the second transmission belt. The above structure satisfies the retraction or extension of the first wire rope assembly 610 and the second wire rope assembly 620, thereby enabling the belt conveyor to extend or shorten as the coal mining face moves.

[0043] In this embodiment, the traction mechanism may further include a control module, a first drive motor 120, a roller assembly 130, and a hydraulic support assembly 140.

[0044] The frame 110 provides a mounting base for the control module, the first drive motor 120, the roller assembly 130, and the hydraulic support assembly 140. The roller assembly 130 is a moving functional component of the traction mechanism. The first drive motor 120 provides driving force to the roller assembly 130. The hydraulic support assembly 140 is a leveling support functional component of the traction mechanism. The hydraulic support assembly 140 can be a hydraulic support jack, a support hydraulic rod, etc. This application does not impose any restrictions on this. The control module is a control functional component of the traction mechanism. The control module can be a module that combines hydraulic valves and electrical control components, or a module that combines check valves, hydraulic valves, and control valves. This application does not impose any restrictions on this.

[0045] Specifically, the roller assembly 130 is rotatably connected to one end of the frame 110, the hydraulic support assembly 140 is disposed at one end of the frame 110, and the control module and the first drive motor 120 are disposed at the other end of the frame 110. One end of the frame 110 is opposite to the other end of the frame 110. The first drive motor 120 is connected to the roller assembly 130 and can drive the roller assembly 130 to rotate relative to the frame 110. The control module is electrically connected to the hydraulic support assembly 140 and can control the hydraulic support assembly 140 to switch between a leveling state and a retracted state. When the control module controls the hydraulic support assembly 140 to be in the leveling state, the hydraulic support assembly 140 supports the frame 110; when the control module controls the hydraulic support assembly 140 to be in the retracted state, the roller assembly 130 supports the frame 110.

[0046] During the use of the traction mechanism, the control module controls the hydraulic support assembly 140 to be in a retracted state, the roller assembly 130 supports the frame 110, and the first drive motor 120 drives the roller assembly 131 to rotate, so that the frame 110, control module, first drive motor 120 and hydraulic support assembly 140 move accordingly. When the traction mechanism moves to a designated position (the designated position refers to the designated position that the traction mechanism needs to reach in order to cooperate with the belt conveyor), the control module controls the hydraulic support assembly 140 to be in a leveling state. The hydraulic support assembly 140 is located between the ground and the frame 110. The hydraulic support assembly 140 supports the frame 110, so that the traction mechanism is fixed relative to the ground, avoiding the wheels from being suspended in the air and causing the center of gravity of the traction mechanism to be unstable. At the same time, the hydraulic support assembly 140 can level the position of the traction mechanism and the ground, thereby ensuring the traction effect of the traction mechanism.

[0047] In a further technical solution, the frame 110 may include a first sub-frame 111 and a second sub-frame 112, and the roller assembly 130 may include a drive roller assembly 131, a driven roller assembly 132, a drive shaft 133, and an auxiliary roller assembly 134. Specifically, the first sub-frame 111 and the second sub-frame 112 are hinged together so that when the traction mechanism moves in a roadway with a certain slope, the hinged structure has a rotational degree of freedom in one direction, thereby enabling the drive roller assembly 131, the driven roller assembly 132, and the auxiliary roller assembly 134 to contact the ground to the maximum extent. The drive roller assembly 131 and the driven roller assembly 132 are both rotatably connected to the first sub-frame 111. The first drive motor... 120 is mounted on the first sub-frame 111. The first drive motor 120 is engaged with the drive roller assembly 131. The drive roller assembly 131 is engaged with one end of the drive shaft 133. The other end of the drive shaft 133 is engaged with the driven roller assembly 132. The auxiliary wheel is rotatably connected to the second sub-frame 112, thereby enabling the first drive motor 120 to drive the drive roller assembly 131 to rotate. The drive shaft 133 rotates with the drive roller assembly 131, and the driven roller assembly 132 rotates with the drive shaft 133, thereby achieving synchronous four-wheel drive and increasing the travel speed. At the same time, the travel speed can be adjusted by controlling the speed of the first drive motor 120. The auxiliary wheel is rotatably connected to the second sub-frame 112.

[0048] There are multiple hydraulic support assemblies 140. Parts of the multiple hydraulic support assemblies 140 are distributed around the periphery of the first sub-frame 111, and other parts of the multiple hydraulic support assemblies 140 are distributed around the periphery of the second sub-frame 112. The control module is disposed on the first sub-frame 111 and is electrically connected to the multiple hydraulic support assemblies 140. The above structure, by setting multiple hydraulic support assemblies 140 on the first sub-frame 111 and the second sub-frame 112, enables the multiple hydraulic support assemblies 140 to support the traction mechanism when the control module controls the hydraulic support assemblies 140 to be in a leveling state, and also improves the leveling accuracy.

[0049] In this embodiment, the disclosed traction mechanism may further include a third winch assembly 161, a third wire rope assembly 163, a fourth winch assembly 162, and a fourth wire rope assembly 164. Specifically, the third winch assembly 161 is rotatably connected to the first sub-frame 110, the third wire rope assembly 163 is wound around the third winch assembly 161, the fourth winch assembly 162 is rotatably connected to the second sub-frame 112, and the fourth wire rope assembly 164 is wound around the fourth winch assembly 162. This structure is designed to prevent the belt conveyor from needing to be shut down for maintenance due to breakage or damage to the first wire rope assembly 610 and the second wire rope assembly 620. The third winch assembly 161, the third wire rope assembly 163, the fourth winch assembly 162, and the fourth wire rope assembly 164 are used to achieve this. Rope group 164 replaces the first winch group 153, the first wire rope group 610, the second winch group 154, and the second wire rope group 620. The first drive belt is separate from the first winch group 153 and drives the third winch group 161. The second drive motor 151 drives the third winch group 161 to rotate via the first drive belt, thus retracting or extending the third wire rope group 163. The second drive belt is separate from the second winch group 154 ​​and drives the fourth winch group 162. The second drive motor 151 drives the fourth winch group 162 to rotate via the first drive belt, thus retracting or extending the fourth wire rope group 164. This allows for quick-release replacement, ensuring continuous operation of the belt conveyor.

[0050] Of course, in another alternative solution, to avoid the traction mechanism being unable to extend further as the coal mining face moves due to insufficient length of the first wire rope group 610 and the second wire rope group 620, the disclosed traction mechanism may also include a third winch group 161, a third wire rope group 163, a fourth winch group 162, and a fourth wire rope group 164. Specifically, the third winch group 161 is rotatably connected to the first sub-frame 111, the third wire rope group 163 is wound around the third winch group 161, the fourth winch group 162 is rotatably connected to the second sub-frame 112, and the fourth wire rope group 164 is wound around the fourth winch group 162. After the length of the first wire rope group 610 is exhausted, its end is connected to the end of the wire of the third wire rope group 163. Simultaneously, the drive motor 151 is connected to the first winch group 153 via a belt, connecting the third wire rope group 163 to the first wire rope group 610. The fourth wire rope group 164 can be connected to the second wire rope group 620. The second drive motor 151 drives the first winch group 153 to rotate via the first transmission belt, thereby retracting or extending the first wire rope group 610. The third wire rope group 163 can retract or extend with the first wire rope group 610. Similarly, the third drive motor 152 drives the second winch group 154 ​​to rotate via the second transmission belt, thereby retracting or extending the second wire rope group 620. The fourth wire rope group 164 can retract or extend with the second wire rope group 620, thus further improving the traction effect of the traction mechanism. The advantage of this embodiment is that it realizes the spare and extension of the wire rope length, and the spare wire rope is pre-wound onto the first winch group 153. During use, the drive can be switched in a very short time and with a very simple operation.

[0051] In a further technical solution, the disclosed traction mechanism may also include a wire rope locking assembly 170, which is mounted on the second sub-frame 112. One end of the first wire rope group 610 and one end of the second wire rope group 620 both pass through the wire rope locking assembly 170, and both the first wire rope group 610 and the second wire rope group 620 can be locked with the wire rope locking assembly 170 so that the first wire rope group 610 and the second wire rope group 620 can be in a tensioned state, thereby ensuring that the first wire rope group 610 and the second wire rope group 620 can provide stable support for the conveyor belt.

[0052] In this embodiment, a belt support assembly 181 is detachably provided at the other end of the frame 110. The belt support assembly 181 can provide support for the conveyor belt. A belt lifting assembly 182 is provided at the other end of the frame 110 so that the conveyor belt can adjust its slope as needed. At the same time, the belt lifting assembly 182 raises the height of the conveyor belt to increase the space volume between the conveyor belt and the other end of the frame 110, which is beneficial for workers to install or disassemble other components at the other end of the frame 110.

[0053] In this design, the first sub-frame 111 and the second sub-frame 112 are hinged together. Compared to a single frame, when the frame is long and cannot be in contact with the ground, the high-speed operation of the conveyor belt carrying materials results in poor stability due to the lack of ground contact. This makes the frame prone to shifting or tipping due to inertia, potentially causing serious accidents. This design creates a two-section joint structure for the frame, which not only shortens the length of the individual frame but also allows the joint to adapt to uneven ground. This ensures that the first sub-frame 111 and the second sub-frame 112 are in contact with the ground. When the conveyor belt is running at high speed, the stable contact between the frame and the ground provides high support stability, fundamentally solving the problem caused by frame instability.

[0054] This design places the second wire rope group 620 and the first wire rope group 610 on two separate sub-frames, instead of using the same sub-frame to connect both the second wire rope group 620 and the first wire rope group 610. The first sub-frame 111 and the second sub-frame 112 operate independently. The second wire rope group 620 is connected to the second sub-frame 112, and the first wire rope group 610 is connected to the first sub-frame 111. The telescopic conveyor belt 300 may include an upper belt and a lower belt. Since the second wire rope group 620 bears... The upper belt and the first wire rope group 610 support the lower belt. As those skilled in the art know, the upper and lower belts run in opposite directions. During operation, the upper and lower belts exert opposite pulling forces on the second sub-frame 112 and the first sub-frame 111, respectively. The two sub-frames are connected by an interlocking joint. The opposing forces cause the forces between the two sub-frames to be opposite in direction. The forces from the upper and lower belts are consumed and canceled out within each sub-frame, thus ensuring that the two sub-frames can be stably placed on the ground. If the original design connects the second wire rope group 620 and the first wire rope group 610 to the same sub-frame, the other sub-frame becomes useless, only serving as a storage space for spare wire ropes. Therefore, the hinged design of the two sub-frames in this scheme not only achieves adaptive deformation to ground with varying flatness but also allows them to cooperate and internally dissipate opposing forces.

[0055] However, while the two subframes connected in this two-section design can adapt to uneven ground, when the ground dips down, the connection point also tilts downwards, causing the two frames to form a "U" shape. In this case, the original design, which only used a small support roller to hold the lower belt, becomes ineffective. Figure 10As shown, when passing over the sunken ground, the high-speed lower belt will "float" because there is no pressing component above it. Furthermore, since the lower belt carries no material and is relatively light, it will adhere to the lower surface of the upper belt, causing severe friction. This not only damages the belt but also causes its temperature to rise rapidly, leading to accelerated aging and even high-temperature burns. Therefore, this solution designs the small roller with the same structure as the upper roller, i.e., as the first lower limiter 1112, to press down on the lower belt, preventing it from floating and ensuring that the upper and lower belts maintain a fixed distance and do not contact each other.

[0056] Meanwhile, when traversing the sunken ground, the high-speed (existing belt conveyors have an average belt speed of 4.5 m / s, and some high-efficiency belt conveyors can reach an average belt speed of 5.5 m / s) upper belts carrying materials will cause severe jolting as they pass, resulting in material spillage and dust, creating a "fog" effect in the narrow space of the tunnel. Therefore, this solution designs the upper and lower support rollers near the hinge as a first upper limit stop 1111, a first lower limit stop 1112, a second upper limit stop 1121, and a second lower limit stop 1122, respectively. The first upper limit stop 1111, the first lower limit stop 1112, the second upper limit stop 1121, and the second lower limit stop 1122 have the same structure, and their connection with the first sub-frame 111 and the second sub-frame 112 is a flexible connection. This solution only requires designing the 1-3 sets of small support rollers near the hinge as limiter structures.

[0057] Specifically, the lower parts of the first upper limit switch 1111, the first lower limit switch 1112, the second upper limit switch 1121, and the second lower limit switch 1122 are connected to the first sub-carriage frame 111 by springs. This is used to buffer and release the jolt force received by the belt when it passes through at high speed, preventing material from flying. See also Figure 11 .

[0058] Based on the aforementioned stretchable belt conveyor, this application also discloses a method of use applicable to the aforementioned stretchable belt conveyor, the method of use including:

[0059] S10. The main body of the equipment 200 moves to the first position, and the traction mechanism drives the first wire rope group 610 and the second wire rope group 620 to shorten or extend the first length, while the telescopic conveyor belt 300 remains taut.

[0060] In this step, the traction mechanism drives the first wire rope group 610 and the second wire rope group 620 to shorten or lengthen by a first length so that the first wire rope group 610 and the second wire rope group 620 can be in a tensioned state. The first position refers to the equipment body 200 moving to a designated position with the tunneling face.

[0061] S20. Adjust the telescopic conveyor belt 300 to be in a taut state, and drive the telescopic conveyor belt 300 to rotate from the main body of the equipment 200.

[0062] In a further technical solution, step S10 may also include: multiple upper roller assemblies 410 spaced apart, with multiple first locking devices locked to the first wire rope group 610; multiple lower roller assemblies 420 spaced apart, with multiple second locking devices locked to the second wire rope group 620.

[0063] In a further technical solution, step S10 may also include: multiple quick-assembly unit brackets 700 are spaced apart, and the multiple quick-assembly unit brackets 700 are located between the equipment body 200 and the traction mechanism, and the multiple quick-assembly unit brackets 700 all support the first wire rope group 610 and the second wire rope group 620.

[0064] When this invention is used in a tunneling face, the machine body needs to be gradually extended with the tunneling depth. The traction mechanism follows the tunneling machine step by step, releasing the corresponding length of the first wire rope group 610 and the second wire rope group 620 according to the travel distance to extend the machine body. Simultaneously, upper idler roller assemblies 410 and lower idler roller assemblies 420 are installed at intervals on the first and second wire rope groups 610 and 620 to support the telescopic conveyor belt 300. The extension of the telescopic conveyor belt 300 is accomplished by the belt tensioning assembly 220. After the traction mechanism has traveled a certain distance, to ensure the sag of the first and second wire rope groups 610 and 620, a quick-installation unit bracket 700 is installed to support the first and second wire rope groups 610 and 620. The extension of the machine body is then repeated using the above steps. When the belt tensioning assembly 220 has released the entire length of the telescopic conveyor belt 300, it stores and tensions the extended telescopic conveyor belt 300. When this invention is used in a longwall mining face, the machine body needs to be gradually shortened as the coal seam is mined. The traction mechanism retracts gradually along with the coal mining machine, and the first wire rope group 610 and the second wire rope group 620 of corresponding lengths are stored according to the travel distance to shorten the machine body. Simultaneously, the upper idler roller assembly 410 and the lower idler roller assembly 420 of the first wire rope group 610 and the second wire rope group 620 are removed, and the spaced quick-assembly unit supports 700 are dismantled. The shortening of the telescopic conveyor belt 300 is accomplished by the belt tensioning assembly 220. After the belt tensioning assembly 220 stores a certain length of the telescopic conveyor belt 300, the joint of the telescopic conveyor belt 300 is removed and disconnected, and the excess conveyor belt is wound out by the belt winding assembly 230.

[0065] In a further technical solution, step S10 may include:

[0066] S101. The control module controls the hydraulic support assembly 140 to be in a retracted state, the first drive motor 120 drives the roller assembly 131 to rotate, the frame 110 moves to the first position as the roller assembly 130 rotates, and the first drive motor 120 stops driving the roller assembly 131 to rotate.

[0067] In this step, the first drive motor 120 drives the roller assembly 131 to rotate, so that the frame 110, control module, first drive motor 120 and hydraulic support assembly 140 move accordingly. When the traction mechanism moves to the first position (the first position refers to the designated position that the traction mechanism needs to reach in order to cooperate with the belt conveyor), the first drive motor 120 stops driving the roller assembly 131 to rotate.

[0068] S102. The control module controls the hydraulic support assembly 140 to be in a leveling state.

[0069] In this step, the hydraulic support assembly 140 is in contact with the ground and the frame 110. The hydraulic support assembly 140 supports the frame 110 to fix the traction mechanism relative to the ground, preventing the wheels from being suspended in the air and causing instability in the center of gravity of the traction mechanism. At the same time, the hydraulic support assembly 140 can level the position of the traction mechanism and the ground, thereby ensuring the traction effect of the traction mechanism.

[0070] In a further technical solution, in step S102, the ranging sensor transmits the signal of the measured actual distance to the control module. The control module controls the hydraulic support assembly 140 to extend by the difference between the actual distance and the preset distance. The preset distance refers to the length of the support end of the hydraulic support assembly 140 in the retracted state and the extended end of the hydraulic support assembly 140.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A retractable belt conveyor, characterized in that, The device includes a main body, a telescopic conveyor belt, a support assembly, a traction mechanism, a tail assembly, a first wire rope group, and a second wire rope group. Along a first direction, the main body, the traction mechanism, and the tail assembly are arranged sequentially at intervals. One end of each of the first and second wire rope groups is wound at intervals around the traction mechanism, which can drive both groups to shorten or lengthen. The other ends of both groups are connected to the main body. Along the direction of gravity, the second and first wire rope groups are arranged at intervals. One end of the telescopic conveyor belt is rotatably connected to the main body, allowing the main body to drive it to rotate. The other end of the conveyor belt is rotatably connected to the tail assembly. Both the first and second wire rope groups are slidably engaged with the support assembly, which supports the telescopic conveyor belt. The support assembly is located between one end of the first wire rope group and the other end of the first wire rope group. The first direction intersects the direction of gravity. The support assembly includes an upper idler assembly and a lower idler assembly. The first wire rope group is slidably engaged with the upper idler assembly, and the second wire rope group is slidably engaged with the lower idler assembly. The upper idler assembly and the lower idler assembly are arranged sequentially along the direction of gravity, and both the upper idler assembly and the lower idler assembly support the telescopic conveyor belt. The support assembly comprises multiple components, and the first wire rope group and the second wire rope group are slidably engaged with the multiple support assemblies. Along the first direction, the multiple support assemblies are arranged at intervals in sequence. The upper idler roller assembly is equipped with a first locking device, and the lower idler roller assembly is equipped with a second locking device. The first locking device is locked in place with the first wire rope group, and the second locking device is locked in place with the second wire rope group.

2. The extendable belt conveyor according to claim 1, characterized in that, The main body of the equipment includes a head drive assembly, a belt tensioning assembly, and a belt take-up and release assembly. Along the first direction, the head drive assembly, the belt tensioning assembly, the belt take-up and release assembly, the traction mechanism, and the tail assembly are arranged sequentially at intervals. One end of the telescopic conveyor belt is rotatably connected to the belt take-up and release assembly. Both the head drive assembly and the belt tensioning assembly are rotatably engaged with the telescopic conveyor belt. The head drive assembly can drive the telescopic conveyor belt to rotate. The belt take-up and release assembly can control the telescopic conveyor belt to shorten or lengthen. The belt tensioning assembly can tension a portion of the telescopic conveyor belt that is rotatably engaged with it.

3. The extendable belt conveyor according to claim 2, characterized in that, It also includes a quick-assembly unit bracket, which supports the first wire rope group and the second wire rope group, and the quick-assembly unit bracket is located between the main body of the equipment and the traction mechanism.

4. The retractable belt conveyor according to claim 3, characterized in that, The traction mechanism includes a frame, a second drive motor, a third drive motor, a first winch assembly, and a second winch assembly. The second drive motor and the third drive motor are both mounted on the frame. The second winch assembly and the first winch assembly are rotatably connected to the frame. The second drive motor and the first winch assembly are driven by a first transmission belt assembly. One end of the first wire rope assembly is wound around the first winch assembly. The third drive motor and the second winch assembly are driven by a second transmission belt assembly. One end of the second wire rope assembly is wound around the second winch assembly.

5. The retractable belt conveyor according to claim 4, characterized in that, The traction mechanism further includes a control module, a first drive motor, a roller assembly, and a hydraulic support assembly. The roller assembly is rotatably connected to one end of the frame. The hydraulic support assembly is located at one end of the frame, and the control module and the first drive motor are located at the other end of the frame, wherein one end of the frame is opposite to the other end of the frame. The first drive motor is connected to the roller assembly and can drive the roller assembly to rotate relative to the frame. The control module is electrically connected to the hydraulic support assembly and can control the hydraulic support assembly to switch between a leveling state and a retracted state. When the control module controls the hydraulic support assembly to be in the leveling state, the hydraulic support assembly supports the frame; when the control module controls the hydraulic support assembly to be in the retracted state, the roller assembly supports the frame.

6. The extendable belt conveyor according to claim 5, characterized in that, The vehicle frame includes a first sub-frame and a second sub-frame. The roller assembly includes a drive roller assembly, a driven roller assembly, a drive shaft, and an auxiliary roller assembly. The first sub-frame and the second sub-frame are hinged together. The drive roller assembly and the driven roller assembly are rotatably connected to the first sub-frame. A first drive motor is mounted on the first sub-frame and meshes with the drive roller assembly. One end of the drive roller assembly meshes with one end of the drive shaft, and the other end of the drive shaft meshes with the driven roller assembly. The auxiliary roller assembly is rotatably connected to the second sub-frame. There are multiple hydraulic support assemblies. A portion of the multiple hydraulic support assemblies is distributed around the periphery of the first sub-frame, and another portion of the multiple hydraulic support assemblies is distributed around the periphery of the second sub-frame. The control module is mounted on the first sub-frame and is electrically connected to the multiple hydraulic support assemblies.

7. The retractable belt conveyor according to claim 6, characterized in that, The first subframe and the second subframe are hinged together. Near the hinge, a first upper limiter and a first lower limiter are provided on the first subframe, and a second upper limiter and a second lower limiter are provided on the second subframe. The first upper limiter, the first lower limiter, the second upper limiter, and the second lower limiter are flexibly connected to the first subframe and the second subframe.

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