An ultra-long fully-mechanized multi-section belt conveyor for mine

Abstract

This invention discloses a multi-segment belt conveyor for ultra-long fully mechanized mining, belonging to the technical field of coal mine transportation equipment. The conveyor comprises multiple independent belt conveyor units sequentially spliced ​​together by dumbbell pins. Each unit includes a frame, conveyor belt, return idler, carrying idler assembly, redirecting roller assembly, and permanent magnet electric drum. The permanent magnet electric drum, as an independent drive unit, is installed at the end of the frame. The carrying idler assembly is equipped with a buffer spring to absorb the impact of falling materials. The redirecting roller assembly enables the conveyor belt to change direction, and the return idler supports the return of the empty conveyor belt. This invention overcomes the length limitations of traditional scraper conveyors through multi-segment modular splicing. Independent drive of each segment avoids the problem of rapidly increasing energy consumption with increasing chain drive length. The permanent magnet electric drum has a compact structure, saving installation space. The buffer spring design improves impact resistance and operational stability. This conveyor is suitable for continuous, efficient, and reliable transportation in ultra-long fully mechanized mining faces.

Description

Technical Field

[0001] This invention belongs to the technical field of coal mine transportation equipment, specifically a multi-section belt conveyor for ultra-long fully mechanized mining. Background Technology

[0002] Long, fully mechanized longwall faces can improve coal production efficiency and reduce mining losses, making them an inevitable trend for achieving intelligent and efficient coal mine production. However, while long faces bring higher production efficiency, the excessively long chain arrangement and excessive load in the central trough directly lead to excessive chain tension, indirectly causing difficulties in starting the scraper conveyor motor under no-load conditions. Furthermore, the motor's output torque is greatly affected by time-varying impact loads such as falling coal, severely restricting the efficient operation of long, fully mechanized longwall faces.

[0003] To address the aforementioned problems, this invention proposes a novel multi-segment belt conveyor for ultra-long fully mechanized mining. This conveyor is composed of multiple small belt conveyor segments, each with an independent drive unit, enabling ultra-long-distance material transport. This structure effectively overcomes the shortcomings of traditional scraper conveyors, such as the bulky chain drive system and significantly increased energy consumption under no-load conditions as the transport distance increases, thereby improving the overall operating efficiency and reliability of the conveying system. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a multi-section belt conveyor for ultra-long fully mechanized mining, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-section belt conveyor for ultra-long fully mechanized mining, comprising a frame, a conveyor belt, return idlers, a load-bearing idler assembly, a redirecting drum assembly, a permanent magnet electric drum, and dumbbell pins; The permanent magnet electric roller is installed at the right end of the machine frame to provide power for the movement of the conveyor belt; The redirecting roller assembly is installed at the left end of the frame; The load-bearing idler assembly and the return idler are respectively fixed to the upper and lower sides of the middle plate of the machine frame; The conveyor belt achieves its reciprocating motion through contact with the permanent magnet electric drum, the redirecting drum assembly, the carrying idler assembly, and the return idler. Preferably, the frame includes a groove, a middle plate, a load-bearing idler assembly mounting groove, a return idler mounting hole, a buffer spring mounting hole, a dumbbell pin mounting groove, a permanent magnet electric drum fixing mounting hole, and a redirecting drum bearing limiting mounting hole. The groove and the middle plate constitute the main body of the fuselage frame; The mounting slot for the load-bearing idler assembly, the mounting hole for the return idler, the mounting hole for the buffer spring, the mounting slot for the dumbbell pin, the mounting hole for the permanent magnet electric drum, and the mounting hole for the redirecting drum bearing limit are all located on the machine frame, providing suitable positions for the installation of other components.

[0006] Preferably, the conveyor belt has excellent properties of wear resistance, fire prevention, and resistance to falling impacts, and sequentially contacts the permanent magnet electric drum, the redirecting drum assembly, the carrying idler assembly, and the return idler to realize its own movement.

[0007] Preferably, the return idler includes a return idler body, a return idler fixing shaft, and a return idler bearing; The return idler fixed shaft ensures the fixation of the return idler shaft end. The return idler body contacts the conveyor belt. Under the action of the return idler bearing, the return idler body rotates itself, supporting the movement of the conveyor belt.

[0008] Preferably, the load-bearing idler assembly includes a load-bearing idler, a load-bearing idler support, a buffer spring protective sleeve, a buffer spring, a load-bearing idler group protection plate, and a load-bearing idler support fixing block; The load-bearing idler is mounted on the load-bearing idler support seat to support the operation of the conveyor belt; The buffer spring is embedded in the buffer spring protective sleeve and installed in the support seat spring mounting hole of the bearing roller support seat to buffer the impact of falling materials. The load-bearing idler support fixing block fixes the load-bearing idler support; The protective plate of the load-bearing idler assembly protects the load-bearing idler assembly and prevents material intrusion.

[0009] Preferably, the redirecting roller assembly includes a redirecting roller, a bearing, and a bearing end cap; The shaft end of the redirecting roller is engaged with the bearing, and with the positioning of the bearing end cover, the whole is fixed and the redirecting roller can rotate.

[0010] Preferably, the permanent magnet electric drum includes an electrical control box, a fixed shaft for the electric drum, bearings, a stationary drum body, a rotating drum body, a sleeve, a permanent magnet synchronous motor, a connecting bushing, and a planetary gear reduction mechanism; The electrical control box supplies power to the permanent magnet synchronous motor. The rotation of the permanent magnet synchronous motor drives the planetary gear reduction mechanism to rotate. The rotation of the planetary gear reduction mechanism drives the rotating drum to rotate. The rotation of the rotating drum drives the conveyor belt to rotate by friction, thereby realizing the function of the belt conveyor to transport materials. The electric drum fixed shaft and the stationary drum body ensure the fixation of the end of the permanent magnet electric drum. The sleeve and the connecting bushing restrict axial displacement.

[0011] Preferably, the electrical control box of the permanent magnet electric roller is equipped with a signal integration device, which is used to collect the operating parameters of the permanent magnet synchronous motor in real time. The operating parameters include the motor output torque signal, speed signal and operating status signal. The signal integration device is set up corresponding to each section of the permanent magnet electric roller to realize independent monitoring of the segmented operating status of the multi-segment conveyor.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides a multi-segment belt conveyor for ultra-long fully mechanized mining, breaking through the limitations of conveying distance. Through a multi-segment structural design, each segment of the belt conveyor has an independent drive unit, which can be flexibly spliced ​​according to the length of the working face to achieve laying of any length; it avoids the problem of a sharp increase in energy consumption caused by the increase in chain link diameter and weight due to the increase in laying distance in traditional scraper conveyors, thus significantly reducing the overall energy consumption of the machine and breaking through the technical bottleneck of traditional conveyors that cannot be laid over long distances due to the limitation of chain length and strength.

[0013] 2. This invention provides a multi-section belt conveyor for ultra-long fully mechanized mining, which improves impact resistance and structural strength. Shock-absorbing devices are installed at the connections between the motor drum, idler roller assembly, and frame to effectively absorb impact loads from falling coal and during operation, significantly improving the overall impact resistance and operational stability of the machine, and extending its service life.

[0014] 3. This invention provides a multi-segment belt conveyor for ultra-long fully mechanized mining, which saves space and has a compact structure. This invention sets a permanent magnet electric drum as an independent drive unit in each segment of the conveyor, eliminating the need for high-power motors and reducers at the head and tail of traditional scraper conveyors. This makes the equipment structure more compact, occupies less space, and is suitable for complex and confined underground mining environments. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural diagram of the fuselage frame; Figure 3 This is a schematic diagram of the return idler roller structure; Figure 4 Left view of the load-bearing idler assembly; Figure 5 This is a structural diagram of the support base for the load-bearing idler roller; Figure 6 This is a structural schematic diagram of the load-bearing idler assembly; Figure 7 Schematic diagram of the redirecting roller assembly; Figure 8 This is a schematic diagram of the internal structure of a permanent magnet electric drum. Figure 9 A schematic diagram of the fixed shaft and stationary drum body of the electric drum; Figure 10 This is a schematic diagram of the rotating drum. Figure 11 This is a schematic diagram of a planetary gear reduction mechanism; Figure 12 This is a perspective view of the overall structure. Figure 13 This is a schematic diagram of a belt conveyor installation.

[0017] In the diagram: 1-Frame, 2-Conveyor belt, 3-Return idler, 4-Carrying idler assembly, 5-Isolation roller assembly, 6-Permanent magnet electric roller, 7-Dumbbell pin, 101-Trough side, 102-Middle plate, 103-Carrying idler assembly mounting slot, 104-Return idler mounting hole, 105-Buffer spring mounting hole, 106-Dumbbell pin mounting slot, 107-Permanent magnet electric roller fixed mounting hole, 108-Isolation roller bearing limit mounting hole, 301-Return idler body, 302-Return idler fixed shaft, 303-Return idler bearing, 311-Return idler bearing limit mounting hole, 312-Fixed shaft balance section receiving hole, 321-Fixed shaft mounting section, 322-Fixed shaft bearing limit section, 323-Fixed shaft balance section, 401-Carrying idler, 402-Carrying idler support seat 421-Load-bearing idler mounting hole, 422-Support seat spring mounting hole, 423-Pin hole, 403-Buffer spring protective sleeve, 404-Buffer spring, 405-Load-bearing idler group protection plate, 406-Load-bearing idler support seat fixing block, 501-Redirecting roller, 502-Bearing, 503-Bearing end cover, 600-Electric control box, 601-Electric roller fixing shaft, 611-Transmission line hole, 602-Bearing, 603-Stationary roller body, 631-Bearing mounting groove, 632-Rotating roller body limit step, 604-Rotating roller body, 641-Rotating roller shaft end, 605-Sleeve, 606-Permanent magnet synchronous motor, 607-Connecting bushing, 608-Planetary gear reduction mechanism, 681-Sun gear, 682-Planetary gear, 683-Transmission frame, 684-Keyway. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1-13 As shown, this invention provides a multi-segment belt conveyor for ultra-long fully mechanized mining, including a frame 1, a conveyor belt 2, a return idler 3, a load-bearing idler assembly 4, a redirecting roller assembly 5, a permanent magnet electric roller 6, and dumbbell pins 7. The permanent magnet electric roller 6 is installed at the right end of the frame 1 to provide power for the movement of the conveyor belt 2. The redirecting roller assembly 5 is installed at the left end of the frame 1. The load-bearing idler assembly 4 and the return idler 3 are respectively fixed to the upper and lower sides of the middle plate of the frame 1. The conveyor belt 2 achieves its reciprocating motion through contact with the permanent magnet electric roller 6, the redirecting roller assembly 5, the load-bearing idler assembly 4, and the return idler 3. The dumbbell pins 7 are installed in dumbbell pin mounting slots at both ends of the frame 1.

[0020] Advantageously, the frame 1 includes: a groove side 101, a middle plate 102, a load-bearing idler assembly mounting groove 103, a return idler mounting hole 104, a buffer spring mounting hole 105, a dumbbell pin mounting groove 106, a permanent magnet electric drum fixing mounting hole 107, and a redirecting drum bearing limiting mounting hole 108; the groove side 101 and the middle plate 102 are connected and fixed by direct welding to ensure the strength of the structure, forming the main body of the frame 1; the load-bearing idler mounting groove 103 is square, opened on the upper surface of the frame 1 near the groove side 101, symmetrical about both sides of the center line of the frame 1, arranged sequentially along the direction of the frame 1, and a step is machined at the upper end; the buffer spring mounting hole 105 is circular, opened in the load-bearing idler mounting groove 103. The lower surface and left and right sides; the bearing idler mounting groove 103 provides a foundation for the installation and fixation of the bearing idler assembly 4, and the buffer spring mounting hole facilitates the installation and fixation of the spring; the return idler mounting hole 104 is located in the lower half of the frame 1, near the upper surface of the bottom groove side 101, and plays a supporting and fixing role for the return idler 3; the permanent magnet electric drum mounting hole 107 and the redirecting drum bearing limiting mounting hole 108 are respectively opened at the right end and left end of the frame near the center line of the frame, and limit and fix the bearings of the permanent magnet electric drum 6 and the redirecting drum assembly 5 to ensure the normal rotation of the drum; the dumbbell pin mounting groove 106 is also located at the left and right ends of the frame 1, and the connection of each section of the belt conveyor is realized by the installation of the dumbbell pin 7.

[0021] Advantageously, the conveyor belt 2 possesses excellent properties such as wear resistance, fire prevention, and resistance to falling impacts. It sequentially contacts the permanent magnet electric drum 6, the redirecting drum assembly 5, the carrying idler assembly 4, and the return idler 3. When the permanent magnet electric drum 6 rotates counterclockwise, the conveyor belt 2 begins to move due to the friction on the surface of the permanent magnet electric drum 6. With the support of the carrying idler assembly 5, the continuous transport of materials is ensured. The materials are transported to the tail end of the belt conveyor and then transferred to the next section of the belt conveyor. With the assistance of the redirecting drum assembly 5, the conveyor belt 2 changes its direction of movement. With the support of the return idler 3, it returns to the permanent magnet electric drum 6 at the right end of the frame 1, realizing the cycle of movement and ensuring the continuous transport of materials.

[0022] Advantageously, the return idler 3 includes: a return idler body 301, a return idler fixing shaft 302, and a return idler bearing 303; the return idler fixing shaft 302 is a stepped shaft with: a fixing shaft mounting section 321, a fixing shaft bearing limiting section 322, and a fixing shaft balancing section 323; the fixing shaft mounting section 321 is directly mounted on the return idler mounting hole 104 of the machine frame, realizing circumferential fixation of the return idler fixing shaft 302, and the fixing shaft mounting section 321 is axially fixed by the end face of the return idler body 301, ensuring that the end of the return idler 3 is fixed; the return idler body 301 is a slender cylinder, supporting the conveyor belt for unloaded return movement, and has return idler bearing limiting mounting holes 311 and fixing shaft balancing section receiving holes 312 on both sides, the fixing shaft balancing section receiving holes 312 ensuring that the fixing shaft balancing section 323 is within the return idler body 301. 1. The internal space is sufficient; the return roller bearing 303 is embedded in the return roller bearing limiting installation hole 311, and the outer ring of the return roller bearing 303 cooperates with the return roller bearing limiting installation hole 311 to achieve circumferential fixation and axial fixation of the left end. The axial fixation of the right side of the return roller bearing 303 is achieved through the fixed shaft bearing limiting section 322. The inner ring of the return roller bearing 303 cooperates with the fixed shaft balance section 323 to fix the return roller fixed shaft 302. When the conveyor belt 2 moves, the return roller fixed shaft 302 is fixed on the return roller mounting hole 104 of the machine frame and is also fixed by cooperating with the inner ring of the return roller bearing 303 to fix the end of the return roller 3. The return roller body 301 is in direct contact with the conveyor belt 2 and is fixed by cooperating with the outer ring of the return roller bearing 303. Under the drive of the conveyor belt 2, the return roller 3 cylinder rotates.

[0023] Advantageously, the carrying idler assembly 4 includes: a carrying idler 401, a carrying idler support 402, a buffer spring protective sleeve 403, a buffer spring 404, a carrying idler assembly protection plate 405, and a carrying idler support fixing block 406; the carrying idler 401 has the same structure as the return idler 3; the fixing shaft of the carrying idler 401 is also directly installed in the corresponding circular carrying idler mounting hole 421 of the carrying idler support 402 for fixing, thus providing support for the conveyor belt carrying the material; the bottom of the idler support 402 has two shallow support spring mounting holes 422, and the left and right sides are... Each support seat spring mounting hole 422 is made with a shallow depth to provide a mounting position for the spring. Simultaneously, pin holes 423 are machined at the corresponding mounting hole positions to fix the buffer spring protective sleeve 403. The buffer spring protective sleeve 403 protects and guides the buffer spring 404. One end is embedded in the spring mounting hole of the bearing roller support seat 402 and fixed by a pin to achieve movement together with the bearing roller support seat 402. The other end is installed in the buffer spring mounting hole 105 on the machine frame 1. The depth of the buffer spring mounting hole 105 is greater than the length of the buffer spring protective sleeve 403. The protective sleeve is designed to allow for axial movement. The buffer spring 404 is nested within the buffer spring protective shell 403, with one end abutting the bottom surface of the spring mounting hole on the bearing idler support 402, and the other end limiting axial displacement through the buffer spring mounting hole 105 on the machine frame (the depth of the spring mounting hole is less than the spring's natural state), utilizing the spring's compression characteristics to achieve a buffering effect. The bearing idler support fixing block 405 is T-shaped and embedded in the bearing idler mounting groove of the machine frame. The upper surface of the bearing idler support fixing block 405 is level with the upper surface of the machine frame groove side 101, achieved through a step. Axial displacement is limited by bolts fixing the bearing idler support fixing block 405 to the step of the bearing idler mounting groove 103. The lower surface of the bearing idler support fixing block 405 is in contact with the upper surface of the bearing idler support 402, limiting the upward displacement of the bearing idler support due to the upward action of the compressed buffer spring 404. The idler assembly protection plate 405 is installed on the inner side of the machine frame bearing idler mounting groove 103 near the material transport, and a protection plate is also installed on the outer side of the corresponding machine frame bearing idler mounting groove 103, fixed by bolts, which serves to isolate dust and protect the bearing idler assembly. When the material falls, the impact is transmitted to the bearing idler assembly 4 via the belt 2. The bearing idler 401 is subjected to a downward force, which is transmitted to the bearing idler support 402 through the bearing idler fixing shaft. At this time, the buffer spring 404 is compressed, the impact force is absorbed, and the force acting on the structure is canceled out, thus achieving the protection of the bearing idler assembly 4.

[0024] Advantageously, the redirecting roller assembly 5 includes: a redirecting roller 501, a bearing 502, and a bearing end cover 503; the redirecting roller is composed of a redirecting roller fixed shaft 511 and a redirecting roller body 512; the redirecting roller fixed shaft 511 is cylindrical, with a diameter smaller than that of the redirecting roller body 512, and is located at both ends of the redirecting roller 501 and is connected and fixed to the inner ring of the bearing 502 by an interference fit; the bearing 502 is installed in the redirecting roller bearing limiting mounting hole 108 in the machine frame, providing a basis for the rotation of the redirecting roller; the bearing end cover 503 is fixed to the outside of the machine frame by bolts, and together with the redirecting roller bearing limiting mounting hole, it fixes the bearing; when the conveyor belt 2 moves to the position of the redirecting roller assembly 5, the conveyor belt 2 and the redirecting roller 501 drive the redirecting roller 501 through friction, the redirecting roller fixed shaft 511 cooperates with the inner ring of the bearing 502, and the rotation of the bearing realizes the rotation of the redirecting roller 501 itself, thereby changing the direction of the conveyor belt movement.

[0025] Advantageously, the permanent magnet electric drum 6 includes: an electrical control box 600, an electric drum fixed shaft 601, a bearing 602, a stationary drum body 603, a rotating drum body 604, a sleeve 605, a permanent magnet synchronous motor 606, a connecting bushing 607, and a planetary gear reduction mechanism 608; the electrical control box 600 is fixed to the machine frame 1 by bolts, and supplies power to the permanent magnet synchronous motor 606 through the power transmission hole 611 inside the electric drum fixed shaft 601; the electric drum fixed shaft 601 is located at both ends of the permanent magnet electric drum, and the electric drum... The stationary roller 603 of the fixed shaft 601 is essentially a common part, forming a fixed end, and is installed on the permanent magnet electric roller fixing mounting hole 107 of the machine frame 1 to fix the end of the permanent magnet electric roller 6; the stationary roller body 603 is cylindrical, with a bearing mounting groove 631 and a rotating roller body limiting step 632 machined inside, providing a suitable position for the installation of the bearing 602, while ensuring the correct installation of the rotating roller body 604; the bearing 602 is installed in the bearing mounting groove 631 inside the stationary roller body 603. The outer ring of bearing 602 is fixed to the bearing mounting groove 631 of the stationary roller body by an interference fit. The axial displacement of the other end is limited by sleeve 605. The inner ring of bearing is fitted to the shaft end 641 of the rotating roller body to ensure that the rotating roller body 604 can rotate on its own. The sleeve 605 is installed between the permanent magnet synchronous motor 606 and the bearing 602 to limit axial displacement and achieve axial positioning. The permanent magnet synchronous motor 606 is fixed on the electric roller fixed shaft 601 (the electric roller fixed shaft is relatively long and is used to fix the permanent magnet synchronous motor). (Providing conditions), the axial displacement is limited by the sleeve 605, which is the power source for the rotation of the permanent magnet electric drum 6; the sun gear 681 of the planetary gear reduction mechanism 608 is connected to the output shaft of the permanent magnet synchronous motor 606 through the connecting bushing 607 to realize its own movement; the planetary gears 682 of the planetary gear reduction mechanism 608 amplify the torque of the motor and output it to the transmission frame 683 of the planetary gears 682. The transmission frame 683 is connected to the rotating drum body 604 through a flat key to realize the rotation function of the rotating drum body 604.

[0026] Advantageously, the electrical control box 600 of the permanent magnet electric roller 6 is equipped with a signal integration device, which is used to collect the operating parameters of the permanent magnet synchronous motor 606 in real time. The operating parameters include the motor output torque signal, speed signal, and operating status signal. The signal integration device is respectively set with each section of the permanent magnet electric roller to realize independent monitoring of the segmented operating status of the multi-segment conveyor. The electrical components in the device are connected to the electrical control box 600 by signal. The electrical control box 600 controls the corresponding electrical components. The electrical control box 600 is equipped with a control processor, which contains a corresponding control program. The control processor integrates an input module, a processing module, and an output module. The input module collects and inputs the signals transmitted by the electrical components into the processing module. The processing module processes the input signals and sends the processed signals to the corresponding electrical components through the output module to control the corresponding electrical components.

[0027] The working process of a multi-section belt conveyor for ultra-long fully mechanized mining includes the following steps: Step 1: Selection and Inter-section Assembly. First, determine the required number and specifications of independent belt conveyor units based on the actual length of the mine roadway, working space conditions, and material transport volume requirements. Each conveyor unit is precisely connected using high-strength dumbbell pins (7). This connection method ensures the stability of the inter-section connection while flexibly adapting to roadway layouts of different lengths, quickly assembling into a complete long-distance continuous conveying system, ensuring smooth conveyor belt operation during subsequent transport.

[0028] Step 2: Drive System Start-up and Power Transmission. Control commands are issued via the electrical control box 600 to start the permanent magnet electric rollers 6 of each conveyor section. As independent drive units, the permanent magnet electric rollers 6 are highly efficient and energy-saving. After starting, they drive the rotating drum body 604 to rotate at a uniform speed. Utilizing the friction between the rotating drum body 604 and the conveyor belt 2, power is smoothly transmitted, driving the conveyor belt 2 to start running at a preset speed, providing continuous and stable power support for material conveying.

[0029] Step 3: Material Receiving and Buffering Protection. During the operation of conveyor belt 2, it continuously receives coal and rock materials falling from the mining face, achieving continuous transportation. To address the impact load generated by the falling material, the buffer springs 404 configured in the bearing idler assembly can quickly absorb the impact energy, effectively mitigating the impact of the material on conveyor belt 2 and the machine body. This not only prevents damage to the conveyor belt due to impact but also improves the stability of the entire machine's operation, ensuring smooth and leak-free material transport.

[0030] Step 4: Inter-section reversal and material transfer. When the material is conveyed by the conveyor belt 2 to the reversing roller assembly 5 at the inter-section connection position, the reversing roller 501 rotates synchronously. On the one hand, it realizes the smooth adjustment of the conveyor belt's transport direction to adapt to the changes in the roadway direction during long-distance transport; on the other hand, it guides the smooth transfer of material between two adjacent conveyor belt sections, preventing material accumulation or spillage, and ensuring the continuity and efficiency of long-distance transport.

[0031] Step 5: Conveyor Belt Return and Circulation. After completing material conveying, the empty conveyor belt 2, supported evenly by the return idler roller 3, smoothly returns to the permanent magnet electric drum 6 along the preset return path, forming a closed-loop circulation mode. The supporting effect of the return idler roller 3 effectively reduces the sagging deformation of the empty conveyor belt, lowers the running resistance, and ensures the continuous and stable circulation operation of the entire conveying system, meeting the needs of long-term continuous production in the mine.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-section belt conveyor for ultra-long fully mechanized mining, characterized in that: Includes frame (1), conveyor belt (2), return idler (3), load-bearing idler assembly (4), redirecting roller assembly (5), permanent magnet electric roller (6), dumbbell pin (7); The permanent magnet electric roller (6) is installed at the right end of the machine frame (1) to provide power for the movement of the conveyor belt (2); The redirecting roller assembly (5) is installed at the left end of the frame (1); The carrying idler assembly (4) and the return idler (3) are respectively fixed to the upper and lower sides of the middle plate of the machine frame (1); The conveyor belt (2) achieves its reciprocating motion through contact with the permanent magnet electric drum (6), the redirecting drum assembly (5), the carrying idler assembly (4), and the return idler (3); The dumbbell pins (7) are installed in the dumbbell pin mounting slots at both ends of the frame (1).

2. The multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 1, characterized in that: The frame (1) includes a groove (101), a middle plate (102), a load-bearing idler assembly mounting groove (103), a return idler mounting hole (104), a buffer spring mounting hole (105), a dumbbell pin mounting groove (106), a permanent magnet electric drum fixing mounting hole (107), and a redirecting drum bearing limiting mounting hole (108). The groove (101) and the middle plate (102) constitute the main body of the fuselage frame (1); The mounting groove (103) for the bearing idler assembly, the mounting hole (104) for the return idler, the mounting hole (105) for the buffer spring, the mounting groove (106) for the dumbbell pin, the mounting hole (107) for the permanent magnet electric drum, and the mounting hole (108) for the redirecting drum bearing limit are all located on the frame (1), providing suitable positions for the installation of other components.

3. A multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 2, characterized in that: The conveyor belt (2) has excellent properties of wear resistance, fire prevention and impact resistance. It contacts the permanent magnet electric drum (6), the redirecting drum assembly (5), the carrying idler assembly (4) and the return idler (3) in sequence to realize its own movement.

4. A multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 3, characterized in that: The return idler (3) includes a return idler body (301), a return idler fixed shaft (302), and a return idler bearing (303). The return idler fixed shaft (302) ensures the fixation of the shaft end of the return idler (3). The return idler body (301) contacts the conveyor belt (2). Under the action of the return idler bearing (303), the return idler body (301) rotates itself, supporting the movement of the conveyor belt (2).

5. A multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 4, characterized in that: The load-bearing idler assembly (4) includes a load-bearing idler (401), a load-bearing idler support seat (402), a buffer spring protective sleeve (403), a buffer spring (404), a load-bearing idler group protection plate (405), and a load-bearing idler support seat fixing block (406). The carrying idler (401) is mounted on the carrying idler support (402) to support the operation of the conveyor belt (2); The buffer spring (404) is embedded in the buffer spring protective sleeve (403) and installed in the support seat spring mounting hole of the bearing roller support seat (402) to buffer the impact of falling materials; The bearing idler support fixing block (406) fixes the bearing idler support (402). The protective plate (405) of the load-bearing idler group protects the load-bearing idler assembly (4) to prevent material intrusion.

6. A multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 5, characterized in that: The redirecting roller assembly (5) includes a redirecting roller (501), a bearing (502), and a bearing end cap (503); The shaft end of the redirecting roller (501) cooperates with the bearing (502), and under the positioning of the bearing end cover (503), the whole is fixed and the redirecting roller (501) can rotate.

7. A multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 6, characterized in that: The permanent magnet electric drum (6) includes an electrical control box (600), an electric drum fixed shaft (601), a bearing (602), a stationary drum body (603), a rotating drum body (604), a sleeve (605), a permanent magnet synchronous motor (606), a connecting bushing (607), and a planetary gear reduction mechanism (608). The electrical control box (600) supplies power to the permanent magnet synchronous motor (606). The permanent magnet synchronous motor (606) rotates, driving the planetary gear reduction mechanism (608) to rotate. The planetary gear reduction mechanism (608) rotates, driving the rotating drum (604) to rotate. The rotating drum (604) rotates by friction, driving the conveyor belt (2) to rotate, thus realizing the function of the belt conveyor to transport materials. The electric drum fixed shaft (601) and the stationary drum body (603) ensure the fixation of the end of the permanent magnet electric drum (6); The sleeve (605) and the connecting bushing (607) restrict axial displacement.

8. A multi-section belt conveyor for ultra-long fully mechanized mining as described in claim 7, characterized in that: The electrical control box (600) of the permanent magnet electric roller (6) is equipped with a signal integration device, which is used to collect the operating parameters of the permanent magnet synchronous motor (606) in real time. The operating parameters include the motor output torque signal, speed signal and operating status signal. The signal integration device is set up corresponding to each section of the permanent magnet electric roller to realize the independent monitoring of the segmented operating status of the multi-segment conveyor.

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