Material conveying system based on telescopic belt conveyor

Abstract

The utility model relates to a material conveying system based on a telescopic belt conveyor. The material conveying system comprises an upstream conveyor, the telescopic belt conveyor, a downstream conveyor A, a downstream conveyor B and a downstream conveyor C, the telescopic belt conveyor comprises a machine head, a machine tail, a machine tail moving device, a rubber belt, a rubber belt transmission device, a stored belt tensioning device, a head chute and a tail chute. The stored belt tensioning device is composed of a hydraulic push rod, a fixed turnabout drum set and a lifting turnabout drum set. The novel telescopic belt conveyor is adopted, a belt storage device and an adhesive tape winding and unwinding device are combined into a whole through the belt storage tensioning device, a tensioning device and a tensioning winch are omitted, and the occupied space of the belt storage device and the occupied space of the adhesive tape winding and unwinding device are reduced; according to the material conveying system, the upstream conveyor can selectively convey materials to the three downstream conveyors through the telescopic belt conveyor, so that four-way material distribution is achieved, and long-distance conveying of the materials after four-way material distribution is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bulk material conveying technology, and in particular to a material conveying system based on a telescopic belt conveyor. Background Technology

[0002] The telescopic belt conveyor works on the same principle as the ordinary belt conveyor, which is a continuous transport device that uses a belt as the traction carrier. The telescopic belt conveyor adds a belt storage device and a belt take-up and undo device to the ordinary belt conveyor. When the traveling trolley moves to the tail end of the machine, the belt enters the belt storage device and the tail retracts. Conversely, the tail extends, thus giving the conveyor the telescopic performance.

[0003] Telescopic belt conveyors are divided into fixed and non-fixed parts; the fixed part consists of a head drive device, a belt storage device, and a belt take-up and unwinding device; the non-fixed part consists of a boltless, quick-detachable bracket and a tail section.

[0004] In the stationary section, the head drive typically consists of a drive drum, reducer, hydraulic coupling, frame, unloading drum, and cleaner. The belt storage device typically includes a belt storage bogie, belt storage bin frame, reversing drum, idler trolley, traveling trolley, tensioning device, and tensioning winch.

[0005] The frame of a conventional belt storage device consists of a frame and supports. Several fixed reversing rollers are installed in the head drive mechanism. These fixed reversing rollers are of the fixed-axis type and primarily support the belt during storage, preventing excessive sag. The fixed reversing rollers cooperate with several reversing rollers on the traveling trolley to reciprocate and guide the belt, keeping it folded within the storage device. The belt is supported by fixed trough rollers and flat rollers. The roller trolley and traveling trolley move along tracks. The traveling trolley typically consists of a frame, reversing rollers, pulley blocks, and wheels. The pulley assembly at the rear of the trolley cooperates with another pulley block to ensure the trolley does not lift under load, maintaining stability and preventing belt deviation on the reversing rollers. When the traveling trolley moves to one side, the belt is released and the machine body extends; when it moves to the other side, the belt is stored and the machine body shortens. A tensioning winch tightens the traveling trolley to achieve appropriate belt tension.

[0006] The tensioning winch is equipped with a belt tension indicator and a tension damper. The tension damper ensures that the belt maintains a certain tension during belt conveyor startup, reducing unevenness of the unloaded belt and slapping between belt layers. The tensioning winch also has a belt take-up and unload device, which consists of a frame, self-aligning idlers, a reducer, a motor, and a rotating rod. Its function is to add belt to or remove belt from the belt conveyor.

[0007] In the non-fixed section, the intermediate frame is a boltless, quick-detachable support, typically composed of H-shaped supports, steel pipes, flat idlers, hook-type trough idlers, and V-shaped idlers, and is the non-fixed part of the machine. The feeding device is installed after the conveyor belt take-up and unload device and connects to the feeding section. The transported material is loaded from the feeding section and transported to the unloading section, where it is unloaded by a set of inclined idlers. The unloading section connects to the tail section. The tail section consists of guide rails and a tail roller seat. The tail roller has the same structure as the roller in the belt storage device and is interchangeable. Its axis position is adjustable to correct belt misalignment at the tail. A scraper is located at the front end of the tail roller to scrape off material from its surface. A set of buffer idlers is also provided at the tail to reduce the impact of material on the conveyor belt during loading, thus improving belt life.

[0008] The main problems with the above-mentioned telescopic belt conveyor are:

[0009] When the telescopic belt conveyor is extended or shortened, it is in the effective material-carrying state of the belt conveyor. This makes the composition and structure of the belt storage device and the belt take-up and unwinding device relatively complex. The belt storage device occupies a large amount of the lower space of the telescopic belt conveyor. In addition, the tensioning device and tensioning winch are indispensable as devices to maintain the tension of the belt conveyor. Summary of the Invention

[0010] This utility model provides a material conveying system based on a telescopic belt conveyor. The system employs a novel telescopic belt conveyor, and the belt tensioning device integrates the belt storage device and the belt take-up and unload device into one unit, eliminating the need for a tensioning device and tensioning winch, thus reducing the space occupied by the belt storage device and the belt take-up and unload device. In this material conveying system, the upstream conveyor can selectively transport materials to three downstream conveyors via the telescopic belt conveyor, achieving four-way material distribution and enabling long-distance material transport after four-way distribution.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A material conveying system based on a telescopic belt conveyor includes an upstream conveyor, a telescopic belt conveyor, downstream conveyor A, downstream conveyor B, and downstream conveyor C. The upstream conveyor, downstream conveyor A, downstream conveyor B, and downstream conveyor C are all arranged perpendicularly to the telescopic belt conveyor. The upstream conveyor is located above the telescopic belt conveyor, and downstream conveyors A, B, and C are all located below the telescopic belt conveyor. Downstream conveyors A and B are located on the moving path of the tail section of the telescopic belt conveyor, with downstream conveyor B located inside downstream conveyor A, and the upstream conveyor located directly above downstream conveyor B. Downstream conveyor C is located below the head section of the telescopic belt conveyor. The telescopic belt conveyor includes a head section, a tail section, a tail section moving device, a belt, a belt drive device, a belt tensioning device, and a head conveyor. The machine head is mounted on a head support, and the tail is mounted on a track on a tail support, and can move along the track under the drive of the tail moving device; the head and tail are connected by a belt, which is driven to rotate by a belt drive device; a head chute is provided on the outside of the head wheel of the head, and a tail chute is provided on the outside of the tail wheel of the tail; the belt tensioning device consists of a hydraulic push rod, a fixed redirecting roller group, and a lifting redirecting roller group. The hydraulic push rod and the fixed redirecting roller group are fixed between the head support and the tail support. The fixed redirecting roller group has two rows of fixed rollers, with the upper row of fixed rollers located above the upper belt and the lower row of fixed rollers located above the lower belt; the lifting redirecting roller group is driven to move up and down by the hydraulic push rod. The lifting redirecting roller group consists of several rows of lifting rollers, with the uppermost row of lifting rollers located below the upper belt and the lowermost row of lifting rollers located below the lower belt.

[0013] Furthermore, the tail section moving device consists of a moving trolley and a trolley travel drive device; the moving trolley is mounted on a track and is driven to move along the track by the trolley travel drive device; the tail section is mounted on the moving trolley, and the moving trolley is equipped with a rail clamp.

[0014] Furthermore, a fixed bracket is provided between the head bracket and the tail bracket, and the fixed redirecting roller assembly is mounted on the fixed bracket.

[0015] Furthermore, the lifting and redirecting roller assembly is mounted on two columns of the U-shaped bracket, and the middle part of the U-shaped bracket is hinged to the extended end of the hydraulic push rod.

[0016] A material conveying system based on a telescopic belt conveyor further includes a control system; the control system includes a main controller, a belt tension sensor, a first travel limit switch, a second travel limit switch, a first lifting limit switch, and a second lifting limit switch; the belt tension sensor is installed on the roller shaft of one of the fixed rollers in the fixed redirecting roller assembly; a first travel limit switch is installed on one side of the track at the corresponding downstream conveyor A, and a second travel limit switch is installed on the corresponding downstream conveyor B; a first lifting limit switch and a second lifting limit switch are installed on the outside of the extended end of the corresponding hydraulic push rod along the height of the fixed bracket; the signal output terminals of the belt tension sensor, the first travel limit switch, the second travel limit switch, the first lifting limit switch, and the second lifting limit switch are respectively connected to the main controller; the tail chute is equipped with a top gate, and the main controller is also connected to the control terminals of the top gate, the trolley travel drive device, the belt drive device, the rail clamp, and the hydraulic push rod; the main controller is also connected to the control terminals of the upstream conveyor, downstream conveyor A, downstream conveyor B, and downstream conveyor C.

[0017] Furthermore, the upstream conveyor has a discharge chute at its discharge end, with the bottom of the discharge chute extending to a height close to the top surface of the tail chute; the downstream conveyors A and B each have a receiving chute at their receiving ends, with the top of the receiving chute extending to a height close to the bottom surface of the tail chute; the receiving chute at the receiving end of the downstream conveyor C is an integral structure with the head chute of the telescopic belt conveyor.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1) A new type of telescopic belt conveyor is adopted. The belt storage and tensioning device combines the belt storage device and the belt take-up and unload device into one, eliminating the need for a tensioning device and tensioning winch, and reducing the space occupied by the belt storage device and the belt take-up and unload device.

[0020] 2) The belt tensioning device consists of a hydraulic push rod, a fixed redirecting roller group, and a lifting redirecting roller group. The belt tension is stable and is not affected when the telescopic belt conveyor is extended or retracted.

[0021] 3) In the material conveying system, the upstream conveyor can selectively convey materials to three downstream conveyors through a telescopic belt conveyor, which realizes four-way material distribution and long-distance material transportation after four-way material distribution;

[0022] 4) The lifting and redirecting roller assembly can be equipped with multiple rows of lifting rollers, which effectively amplifies the stroke of the hydraulic push rod and greatly increases the movement distance of the tail section. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a material conveying system based on a telescopic belt conveyor as described in this utility model.

[0024] Figure 2 This is a schematic diagram of the working state of a material conveying system based on a telescopic belt conveyor as described in this utility model. Figure 1 .

[0025] Figure 3 This is a schematic diagram of the working state of a material conveying system based on a telescopic belt conveyor as described in this utility model. Figure 2 .

[0026] In the diagram: 1. Lifting and redirecting roller assembly; 2. Fixed redirecting roller assembly; 3. Hydraulic push rod; 4. Belt tension sensor; 5. Lifting limit switch one; 6. Tail chute; 7. Rail clamp; 8. Belt drive device; 9. Moving trolley; 10. Trolley travel drive device; 11. Tail support; 12. Upper idler roller; 13. Lower idler roller; 14. Belt; 15. Head support; 16. Lifting limit switch two; 17. Head wheel; 18. Tail wheel; 19. Top gate; 20. Upstream conveyor; 21. Downstream conveyor A; 22. Downstream conveyor B; 23. Downstream conveyor C. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0028] like Figure 1As shown, the material conveying system based on a telescopic belt conveyor of this utility model includes an upstream conveyor 20, a telescopic belt conveyor, a downstream conveyor A 21, a downstream conveyor B 22, and a downstream conveyor C 23; the upstream conveyor 20, downstream conveyor A 21, downstream conveyor B 22, and downstream conveyor C 23 are all arranged perpendicularly to the telescopic belt conveyor; the upstream conveyor 20 is located above the telescopic belt conveyor, and the downstream conveyors A 21, B 22, and C 23 are all located below the telescopic belt conveyor; the downstream conveyors A 21 and B 22 are located on the moving path of the tail of the telescopic belt conveyor, and the downstream conveyor B 22 is located inside the downstream conveyor A 21, while the upstream conveyor 20 is located directly above the downstream conveyor B 22; the downstream conveyor C 23... 23 is located below the head of the telescopic belt conveyor; the telescopic belt conveyor includes a head, a tail, a tail moving drive device, a belt 14, a belt transmission device 8, a belt tensioning device, a head chute, and a tail chute 6; the head is mounted on a head support 15, and the tail is mounted on a track on a tail support 11, and can move along the track under the drive of the tail moving drive device; the head and tail are connected by a belt 14, which rotates under the drive of the belt transmission device 8; a head chute is provided on the outer side of the head wheel 17, and a tail chute 6 is provided on the outer side of the tail wheel 18; The belt tensioning device consists of a hydraulic push rod 3, a fixed redirecting roller group 2, and a lifting redirecting roller group 1. The hydraulic push rod 3 and the fixed redirecting roller group 2 are fixed between the head support 15 and the tail support 11. The fixed redirecting roller group 2 has two rows of fixed rollers. The upper row of fixed rollers is located above the upper belt, and the lower row of fixed rollers is located above the lower belt. The lifting redirecting roller group 1 is driven to move up and down by the hydraulic push rod 3. The lifting redirecting roller group 1 consists of several rows of lifting rollers. The uppermost row of lifting rollers is located below the upper belt, and the lowermost row of lifting rollers is located below the lower belt.

[0029] Furthermore, the tail section moving drive device consists of a moving trolley 9 and a trolley traveling drive device 10; the moving trolley 9 is mounted on a track and is driven to move along the track by the trolley traveling drive device 10; the tail section is mounted on the moving trolley 9, and a rail clamp 7 is mounted on the moving trolley 9.

[0030] Furthermore, a fixed bracket is provided between the head bracket 15 and the tail bracket 11, and the fixed redirecting roller assembly 2 is provided on the fixed bracket.

[0031] Furthermore, the lifting and redirecting roller assembly 1 is mounted on two columns of the U-shaped bracket, and the middle part of the U-shaped bracket is hinged to the extended end of the hydraulic push rod 3.

[0032] The material conveying system based on a telescopic belt conveyor described in this utility model also includes a control system. The control system includes a main controller, a belt tension sensor 4, a first travel switch, a second travel switch, a first lifting travel switch 5, and a second lifting travel switch 16. The belt tension sensor 4 is mounted on the shaft of one of the fixed rollers in the fixed redirecting roller assembly 2. A first travel switch is located on one side of the track at the corresponding downstream conveyor A 21, and a second travel switch is located at the corresponding downstream conveyor B 22. A first lifting travel switch 5 and a second lifting travel switch 16 are mounted on the outer side of the extended end of the corresponding hydraulic push rod 3 along the vertical direction on the fixed bracket. The signal output terminals of the belt tension sensor 4, the first travel switch, the second travel switch, the first lifting travel switch 5, and the second lifting travel switch 16 are respectively connected to the main controller. The tail chute 6 is equipped with a top gate 19. The main controller is also connected to the top gate 19, the trolley travel drive device 10, the belt drive device 8, the rail clamp 7, and the control terminal of the hydraulic push rod 3. The main controller is also connected to the upstream conveyor 20, the downstream conveyor A 21, and the downstream conveyor B 22. 22 and the control terminals of downstream conveyors C and 23.

[0033] Furthermore, the upstream conveyor 20 has a discharge chute at its discharge end, with the bottom of the discharge chute extending to the height near the top surface of the tail chute 6; the downstream conveyors A 21 and B 22 have receiving chutes at their receiving ends, with the tops of the receiving chutes extending to the height near the bottom surface of the tail chute 6; the receiving chute at the receiving end of the downstream conveyor C 23 is an integral structure with the head chute of the telescopic belt conveyor.

[0034] The control method of the material conveying system based on the telescopic belt conveyor described in this utility model is as follows:

[0035] 1) Set the upper and lower limits of the initial tension of the conveyor belt in the main controller, and set two working modes of the telescopic belt conveyor, namely the extension mode and the shortening mode.

[0036] 2) When the upstream conveyor 20 needs to transport materials to the downstream conveyor A 21 or downstream conveyor C23 via the telescopic belt conveyor, the telescopic belt conveyor switches to extended mode (e.g., Figure 2 (as shown);

[0037] The main controller controls the trolley travel drive device 10 to start, driving the mobile trolley 9 and its tail to move along the track. When the tail wheel 18 reaches above the downstream conveyor A 21, the travel limit switch sends a signal to the main controller, and the main controller controls the trolley travel drive device 10 to stop. At the same time, the rail clamp 7 is activated to clamp the track, so that the mobile trolley 9 is fixed on the track.

[0038] When the telescopic belt conveyor switches to the extension mode, the main controller controls the hydraulic push rod 3 to start, and the lifting limit switch 5 controls the extended end of the hydraulic push rod 3 to move to the initial extension adjustment position. After the tail end moves into position, the belt tension sensor 4 transmits the measured value of the belt tension to the main controller, and the main controller controls the hydraulic push rod 3 to adjust the belt tension. When the measured value of the belt tension is lower than the set lower limit of the initial belt tension, the hydraulic push rod 3 drives the lifting redirecting roller group 1 to move downward, so that the return belt moves downward to increase the belt tension. When the measured value of the belt tension sent by the belt tension sensor 4 reaches the set upper limit of the initial belt tension, the main controller controls the hydraulic push rod 3 to stop moving.

[0039] The main controller controls the start of the belt drive device 8 and the top gate 19 of the tail chute 6 of the telescopic belt conveyor; the telescopic belt conveyor is equivalent to a reversible belt conveyor; then the main controller controls the start of the upstream conveyor 20 and the downstream conveyor A21 / downstream conveyor C23, and the upstream conveyor 20 selectively conveys materials to the downstream conveyor A21 or the downstream conveyor C23;

[0040] 3) When the upstream conveyor 20 needs to transport materials to the downstream conveyor B 22 via the telescopic belt conveyor, the telescopic belt conveyor switches to shortened mode (e.g., Figure 3 (as shown);

[0041] The main controller controls the trolley travel drive device 10 to start, driving the mobile trolley 9 and its tail wheel to move along the track. When the tail wheel reaches the top of the downstream conveyor B 22, the travel limit switch 2 sends a signal to the main controller, and the main controller controls the trolley travel drive device 10 to stop. At the same time, the rail clamp 7 is activated to clamp the track, so that the mobile trolley 9 is fixed on the track.

[0042] When the telescopic belt conveyor switches to the shortened mode, the main controller controls the hydraulic push rod 3 to start. As the tail moves, the hydraulic push rod 3 drives the lifting and reversing roller group 1 to move upward, so that the material-carrying belt and the return belt move upward at the same time to play the role of belt storage. When the tail moves into position, the lifting limit switch 16 sends a signal to the main controller at the same time, and the main controller controls the hydraulic push rod 3 to stop moving.

[0043] The main controller starts the top gate 19 of the tail chute 6 of the telescopic belt conveyor, and the belt 14 of the telescopic belt conveyor does not participate in material conveying; then the main controller starts the upstream conveyor 20 and the downstream conveyor B 22, and the material conveyed by the upstream conveyor 20 is directly conveyed to the downstream conveyor B 22 through the tail chute 6.

[0044] The main structure of the telescopic belt conveyor described in this utility model is the same as that of a conventional telescopic belt conveyor. The head section is fixed on the head support 15, and the head wheel 17 is connected to the belt drive device 8. The tail section is mounted on a moving trolley 9, which is driven by a trolley travel drive device 10 and travels along a track mounted on the tail support 11. The telescopic function of the telescopic belt conveyor is achieved by the movement of the tail. Multiple sets of upper idlers 12 and multiple sets of lower idlers 13 are respectively installed on the head support 15 and the tail support 11 to support the upper belt (i.e., the material-carrying belt in the working state) and the lower belt (i.e., the return belt in the working state).

[0045] The biggest difference between the telescopic belt conveyor described in this utility model and the conventional telescopic belt conveyor is that it uses a belt storage and tensioning device instead of the conventional belt storage and tensioning device. The belt storage and tensioning device has a simple structure, is easy to control, and saves space while having two functions.

[0046] The lifting and redirecting roller group 1 in the belt tensioning device can be equipped with multiple rows of lifting rollers according to the stroke requirements. When the telescopic belt conveyor is in shortened mode (non-working state), the belt storage function is achieved by simultaneously lifting the carrying belt and the return belt. Increasing the number of rows of lifting rollers in the lifting and redirecting roller group 1 can multiply the belt storage stroke of the belt 14.

[0047] In this utility model, the head support 15, the belt tensioning device and the tail support 11 are arranged sequentially along the center line of the telescopic belt conveyor. The belt 14 passes through the head wheel 17, the upper idler roller 13, the gap between the upper row of fixed rollers and the uppermost row of lifting rollers, the tail wheel 18, the lower idler roller 13, the gap between the lower row of fixed rollers and the lowermost row of lifting rollers to form a closed loop structure.

[0048] The telescopic belt conveyor has a fixed head and a movable tail that can be kept relatively fixed by a universal rail clamp 7. When the telescopic belt conveyor operates as a reversible belt conveyor, the belt 14 is in a fully released state (no belt storage is required), and the uppermost lifting roller is higher than the material level on the load belt. If needed, the lifting and redirecting roller group 1 in the belt tensioning device can move downwards to tighten the belt 14, thus meeting the requirements for forward and reverse material conveying of the telescopic belt conveyor.

[0049] When the telescopic belt conveyor is in shortened mode, the conveyor belt 14 does not participate in material conveying. The lifting and reversing roller group 1 in the belt tensioning device moves upward to fold the conveyor belt 14 into a retracted state. The tail chute 6 of the telescopic belt conveyor is used as a straight chute for conveying materials from the upstream conveyor 20 to the downstream conveyor B 22.

[0050] In the material conveying system described in this utility model, the upstream conveyor 20 can selectively convey materials to three downstream conveyors via a telescopic belt conveyor, thus realizing the four-way material distribution function and enabling long-distance material conveying after the four-way material distribution.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A material conveying system based on a telescopic belt conveyor, characterized in that, The system includes an upstream conveyor, a telescopic belt conveyor, downstream conveyor A, downstream conveyor B, and downstream conveyor C. All three conveyors are perpendicular to the telescopic belt conveyor. The upstream conveyor is positioned above the telescopic belt conveyor, while downstream conveyors A, B, and C are positioned below it. Downstream conveyors A and B are located on the moving path of the tail section of the telescopic belt conveyor, with downstream conveyor B positioned inside downstream conveyor A and the upstream conveyor positioned directly above downstream conveyor B. Downstream conveyor C is located below the head section of the telescopic belt conveyor. The telescopic belt conveyor includes a head section, a tail section, a tail section moving device, a belt, a belt drive device, a belt tensioning device, a head chute, and a tail chute. The machine head is mounted on the head support, and the tail is mounted on the track of the tail support, and can move along the track under the drive of the tail moving device; the head and tail are connected by a belt, and the belt is driven to rotate by the belt drive device; the head wheel of the head has a head chute on its outer side, and the tail wheel of the tail has a tail chute on its outer side; the belt tensioning device consists of a hydraulic push rod, a fixed redirecting roller group, and a lifting redirecting roller group. The hydraulic push rod and the fixed redirecting roller group are fixed between the head support and the tail support. The fixed redirecting roller group has two rows of fixed rollers, with the upper row of fixed rollers located above the upper belt and the lower row of fixed rollers located above the lower belt; the lifting redirecting roller group is driven to move up and down by the hydraulic push rod. The lifting redirecting roller group consists of several rows of lifting rollers, with the uppermost row of lifting rollers located below the upper belt and the lowermost row of lifting rollers located below the lower belt.

2. The material conveying system based on a telescopic belt conveyor according to claim 1, characterized in that, The tail section moving device consists of a moving trolley and a trolley travel drive device; the moving trolley is set on a track and is driven to move along the track by the trolley travel drive device; the tail section is set on the moving trolley, and the moving trolley is equipped with a rail clamp.

3. A material conveying system based on a telescopic belt conveyor according to claim 1, characterized in that, A fixed bracket is provided between the head bracket and the tail bracket, and the fixed redirecting roller assembly is mounted on the fixed bracket.

4. A material conveying system based on a telescopic belt conveyor according to claim 1, characterized in that, The lifting and redirecting roller assembly is mounted on two columns of a U-shaped bracket, with the middle of the U-shaped bracket hinged to the extended end of the hydraulic push rod.

5. A material conveying system based on a telescopic belt conveyor according to claim 1, characterized in that, It also includes a control system; the control system includes a main controller, a belt tension sensor, a travel limit switch 1, a travel limit switch 2, a lifting limit switch 1, and a lifting limit switch 2; the belt tension sensor is installed on the roller shaft of one of the fixed rollers in the fixed redirecting roller assembly; a travel limit switch 1 is installed on one side of the track at the corresponding downstream conveyor A, and a travel limit switch 2 is installed at the corresponding downstream conveyor B; a lifting limit switch 1 and a lifting limit switch 2 are installed on the outside of the corresponding hydraulic push rod extension end of the fixed bracket along the height direction; the signal output terminals of the belt tension sensor, travel limit switch 1, travel limit switch 2, lifting limit switch 1, and lifting limit switch 2 are respectively connected to the main controller; the tail chute is equipped with a top gate, and the main controller is also connected to the control terminals of the top gate, the trolley travel drive device, the belt drive device, the rail clamp, and the hydraulic push rod; the main controller is also connected to the control terminals of the upstream conveyor, downstream conveyor A, downstream conveyor B, and downstream conveyor C.

6. A material conveying system based on a telescopic belt conveyor according to claim 1, characterized in that, The upstream conveyor is provided with a discharge chute at its discharge end, and the bottom of the discharge chute extends to the height of the top surface of the tail chute. The downstream conveyor A and downstream conveyor B are respectively provided with receiving chute at their receiving ends, and the top of the receiving chute extends to the height of the bottom surface of the tail chute. The receiving chute at the downstream conveyor C receiving end is an integral structure with the head chute of the telescopic belt conveyor.

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