A screw conveyor with drying function

Abstract

The present invention discloses a screw conveyor with a drying function, comprising a conveying pipe and a docking box. The conveying pipe is arranged on a hoisting structure, and is provided with a power system, a hoisting structure, and a drying structure. The docking box is provided with an automatic docking structure. The drying structure comprises a drying hood, a lifting structure, a heating structure, and an air intake system. The conveying pipe is a semicircular cover body, and has docking channels at both ends. The drying hood matches the semicircular cover body of the conveying pipe. The edge of the drying hood has a strip insertion strip, and the edge of the conveying pipe has a strip insertion groove. The strip insertion strip can be inserted into the strip insertion groove. The present invention relates to the technical field of screw conveyors. This technical solution mainly uses a conveying line to complete the transportation of materials between different processes, and can transport multiple materials to different processing equipment separately, reducing the cost of building a material conveying line.

Description

Technical Field

[0001] The present invention relates to the technical field of screw conveyors, in particular to a screw conveyor with a drying function. Background Art

[0002] A screw conveyor is a machine that uses a motor to drive a rotating screw to move materials for conveying. It can convey materials horizontally, inclined, or vertically, and features a simple structure, small cross-sectional area, good sealing, easy operation, simple maintenance, and convenient closed transportation. Screw conveyors are categorized into two types: shafted and shaftless. They are also categorized into U-shaped and tubular screw conveyors. Shafted screw conveyors are suitable for conveying non-sticky dry powders and small particles (such as cement, fly ash, lime, and grain), while shaftless screw conveyors are suitable for conveying sticky and easily entangled materials (such as sludge, biomass, and garbage). The operating principle of a screw conveyor is that rotating spiral blades push the material through the screw conveyor. The forces that prevent the material from rotating with the screw conveyor blades are the material's own weight and the frictional resistance of the screw conveyor casing. The spiral blades are welded to the rotating shaft of the screw conveyor. The blade surface can be solid, belt-shaped, or vane-shaped, depending on the material being conveyed.

[0003] Screw conveyor is a type of conveyor, but the traditional screw conveyor can only realize one-way material movement and cannot change the direction of material movement. At the same time, the current screw conveyor has a relatively single function, and due to the requirement of material transportation length, the length of the screw conveyor is relatively large, so it is necessary to install a hanger structure. Due to the current hanger structure, the installation method requires manual operation, which is more troublesome when replacing parts and maintenance in the later stage. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a screw conveyor with a drying function, comprising a conveying pipe and a docking box, wherein the conveying pipe is arranged on a hoisting structure, the conveying pipe is provided with a power system, a hoisting structure, and a drying structure, and the docking box is provided with an automatic docking structure;

[0005] The drying structure includes: a drying cover, a lifting structure, a heating structure, and an air intake system;

[0006] The conveying pipe is a semicircular cover with docking channels at both ends. The drying cover matches the semicircular cover of the conveying pipe. The edge of the drying cover has a strip insertion strip, and the edge of the conveying pipe has a strip insertion groove. The strip insertion strip can be inserted into the strip insertion groove.

[0007] The lifting structure is arranged at the bottom of the drying cover, and the lifting structure comprises: a plurality of propulsion motors, a plurality of scissor-type telescopic frames, a plurality of slide rails, a plurality of synchronization rods, and a plurality of bases;

[0008] The base is arranged directly below the drying hood, the slide rail is laid on the base, one end of the bottom of the scissor-type telescopic frame is connected to the base, and the other end is movably connected to the slide rail and can move on the slide rail, the synchronization rod is located on one end of the bottom of the scissor-type telescopic frame connected to the slide rail, the propulsion motor is located on the base, the telescopic end of the propulsion motor is connected to the synchronization rod, and the driving end of the propulsion motor can push the synchronization rod to move;

[0009] The heating structure includes: a plurality of heating plates, a heating box, and a heating wire;

[0010] The drying cover has a plurality of mounting slots, the heating plate is embedded in the mounting slots, the heating box is located on the heating plate, and the heating wire is located inside the heating box;

[0011] The air intake system includes: a number of air inlets, fans, and branch pipes;

[0012] The plurality of air inlets are embedded in the upper end of the conveying pipeline, the fan is connected to the plurality of air inlets through branch pipelines, and the plurality of air inlets are laid on the conveying pipeline at equal angles.

[0013] It should be noted that since the conveying pipe has spiral blades installed inside, the feed port of the conveying pipe is located on the upper wall of the conveying pipe, while the discharge port is below the conveying pipe near one end, and the discharge port is "L" shaped, as shown in the attached figure.

[0014] Preferably, the docking structure is provided on a docking box, and a position exchange structure is provided on the docking box;

[0015] The position exchange structure includes: a direction-changing pipe, a moving frame, a moving motor, a pair of linear guide rails, a pair of slides, a conversion frame, a conversion motor, a rotating shaft, and a limit assembly;

[0016] The conversion frame is arranged on the support surface, the conversion motor is located on the rotating frame, the conversion motor is connected to the docking box through a conversion shaft, the docking box is provided with docking ports on three adjacent surfaces, and the limit assembly is arranged on the conversion frame;

[0017] The movable frame is located on the supporting surface, a pair of linear guide rails are provided on the movable frame, a pair of slides are assembled in the pair of linear guide rails, the movable motor is located on the movable frame, the driving end of the movable motor is connected to the pair of slides, the conversion frame is located on the pair of slides, and the docking port is matched with a threaded plug cover, and the docking port can be connected to the conveying pipe and the changing pipe.

[0018] Preferably, the docking structure comprises: a pair of electric push rods, a pair of docking frames, a pair of clamping motors, and a pair of arc-shaped fixing members;

[0019] The pair of electric push rods are installed on the outer wall of the docking box, the pair of docking frames are connected to the telescopic ends of the pair of electric push rods, the pair of clamping motors are located on the pair of docking frames, and the pair of arc-shaped fixing members are arranged on the driving ends of the pair of clamping motors.

[0020] Preferably, the power system comprises: a power transmission box, a power motor, a driving bevel gear, a driven bevel gear, and a telescopic motor;

[0021] The power transmission box is arranged for one end of the conveying pipeline, and a spiral blade is inserted in the conveying pipeline. One end of the spiral blade passes through the power transmission box and is connected to the driven gear. The telescopic motor is located outside the power transmission box, and the telescopic end extends into the power transmission box. The driving end of the power motor is connected to the active bevel gear, and the active bevel gear can be meshed with the driven bevel gear.

[0022] Preferably, the limiting assembly comprises: a limiting feed cylinder, a limiting wheel with a plurality of limiting teeth, and a limiting clip;

[0023] The limiting wheel is mounted on the rotating shaft, the limiting feed cylinder is located on the outer wall of the conversion frame, the limiting cylinder is located on the conversion frame, the piston end of the limiting feed cylinder is connected to the limiting card, and the limiting card can engage with the limiting wheel.

[0024] Preferably, the hoisting structure comprises: a portal frame, a pair of pulling motors, a pair of pulling frames, and a plurality of telescopic rods;

[0025] The pair of pulling motors are arranged on the supporting surface, the pair of pulling frames are connected to the conveying pipe, the telescopic ends of the pair of pulling motors are pin-connected to the upper ends of the pulling frames through connecting rods, and a plurality of telescopic rods are located on the supporting surface and the pulling frames.

[0026] Preferably, a fastening frame is provided between the pair of pulling motors and the supporting surface.

[0027] Preferably, a motor frame is provided between the conversion frame and the steering motor.

[0028] Preferably, fastening frames are provided at both left and right ends of the plurality of slide rails.

[0029] Preferably, the threaded plug caps are each provided with a rotating handle.

[0030] Beneficial effects

[0031] The present invention provides a screw conveyor with a drying function. It has the following beneficial effects: This technical solution primarily utilizes a single conveyor line to transport materials between different processes, enabling the delivery of multiple materials to different processing equipment. This reduces the cost of constructing a material conveyor line and effectively lowers the company's internal transportation costs. Furthermore, to facilitate subsequent maintenance and repair, this solution incorporates multiple structures designed for easy opening and disassembly, effectively assisting operators in completing these tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a screw conveyor with drying function according to the present invention.

[0033] Figure 2 This is a schematic diagram of the power system structure of the present invention.

[0034] Figure 3 It is a structural schematic diagram of the drying structure of the present invention.

[0035] Figure 4 This is a schematic structural diagram of the automatic docking structure of the present invention from a side view.

[0036] Figure 5 This is a schematic top view of the automatic docking structure of the present invention.

[0037] Figure 6 It is a structural schematic diagram of the limiting assembly of the present invention.

[0038] Figure 7 It is a structural schematic diagram of the lifting structure of the present invention.

[0039] Figure 8 Schematic diagram of the heating structure of the present invention.

[0040] Figure 9 It is a schematic diagram of a partial top view of the lifting structure of the present invention.

[0041] Figure 1: Conveying pipe; 2: Direction-changing pipe; 3: Docking box; 4: Drying hood; 5: Inlet motor; 6: Scissor-type telescopic frame; 7: Several slide rails; 8: Synchronous rod; 9: Base; 10: Heating plate; 11: Heating box; 12: Heating wire; 13: Air inlet; 14: Fan; 15: Branch pipe; 16: Mobile frame; 17: Mobile motor; 18: Linear guide rail; 19: Slide; 20: Conversion frame; 21: Conversion motor; 22: , rotating shaft; 23, docking port; 24, threaded plug cover; 25, electric push rod; 26, docking frame; 27, clamping motor; 28, arc-shaped fixing piece; 29, power transmission box; 30, power motor; 31, driving bevel gear; 32, driven bevel gear; 33, telescopic motor; 34, spiral blade; 35, limit feed cylinder; 36, limit wheel; 37, limit card; 38, pulling motor; 39, pulling frame; 40, telescopic rod. DETAILED DESCRIPTION

[0042] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0043] See also Figure 1-9 The present invention provides a technical solution: a screw conveyor with a drying function.

[0044] Embodiment: A screw conveyor with a drying function includes a hoisting structure, a conveying pipe 1, a docking pipe, and a docking box 3. The conveying pipe 1 is arranged on the hoisting structure, the conveying pipe 1 is provided with a power system and a drying structure, and the docking box 3 is provided with an automatic docking structure;

[0045] It should be noted that, in the above, when the material needs to be dried and heated through the conveying pipeline 1, the material inside the conveying pipeline 1 can be heated by the drying structure, and when performing later maintenance and cleaning of material residues inside the conveying pipeline 1, the conveying pipeline 1 can be opened by lifting the drying structure. When the material conveying direction needs to be changed, the position can be changed by the hoisting structure, and the automatic docking structure can be used to achieve the docking of the pipeline. At the same time, due to the length of the conveying pipeline 1, a hoisting structure is provided for this purpose; the material transportation is mainly driven by a power system, and the power system can be quickly disassembled, which is helpful for later maintenance and maintenance;

[0046] Specifically, the drying structure includes: a drying cover 4, a lifting structure, a heating structure, and an air intake system;

[0047] The conveying pipe 1 is a semicircular cover with docking channels at both ends. The drying cover 4 matches the semicircular cover of the conveying pipe 1. The edge of the drying cover 4 has a strip insertion strip, and the edge of the conveying pipe 1 has a strip insertion groove. The strip insertion strip can be inserted into the strip insertion groove.

[0048] It should be noted that, in the above, the drying hood 4 can be raised and lowered by the lifting structure, the drying hood 4 can cooperate with the conveying pipe 1 to achieve sealing, and the heating structure and the air intake system are used to heat the material inside the conveying pipe 1;

[0049] Specifically, the lifting structure is arranged at the bottom of the drying cover 4, and the lifting structure includes: a plurality of propulsion motors 5, a plurality of scissor-type telescopic frames 6, a plurality of slide rails 7, a plurality of synchronization rods 8, and a plurality of bases 9;

[0050] The base 9 is arranged directly below the drying cover 4, and the slide rail is laid on the base 9. One end of the bottom of the scissor-type telescopic frame 6 is connected to the base 9, and the other end is movably connected to the slide rail and can move on the slide rail. The synchronization rod 8 is located on one end of the bottom of the scissor-type telescopic frame 6 connected to the slide rail. The propulsion motor 5 is located on the base 9. The telescopic end of the propulsion motor 5 is connected to the synchronization rod 8, and the driving end of the propulsion motor 5 can push the synchronization rod 8 to move;

[0051] It should be noted that, in the above, the power is provided by a plurality of propulsion motors 5, and the scissor-type telescopic frame 6 is used to assist in the lifting and lowering of the drying hood 4. The synchronization rod 8 is used to make the bottom of the scissor-type telescopic frame 6 achieve synchronous action. The telescopic end of the propulsion motor 5 pushes the bottom of the scissor-type telescopic frame 6 through the synchronization rod 8. After the scissor-type telescopic frame 6 is extended, the drying hood 4 can be driven.

[0052] Specifically, the heating structure includes: a plurality of heating plates 10, a heating box 11, and a heating wire 12;

[0053] The drying cover 4 has a plurality of mounting slots, the heating plate 10 is embedded in the mounting slots, the heating box 11 is located on the heating plate 10, and the heating wire 12 is located inside the heating box 11;

[0054] It should be noted that a plurality of mounting slots for mounting the heating plate 10 are provided on the outer wall of the drying cover 4. The heating wire 12 is used to heat the heating plate 10, and the heating plate 10 is used to heat the material.

[0055] Specifically, the air intake system includes: a number of air inlets 13, a fan 14, and a branch pipe 15;

[0056] A plurality of air inlets 13 are embedded in the upper end of the conveying pipe 1 , and a fan 14 is connected to the plurality of air inlets 13 via a branch pipe 15 . The plurality of air inlets 13 are laid on the conveying pipe 1 at equal angles.

[0057] It should be noted that, in order to heat the material, a fan 14 is used to generate wind, and the wind is transmitted to the plurality of air inlets 13 through branch pipes 15;

[0058] Specifically, the docking structure is provided on the docking box 3, and the docking box 3 is provided with a position exchange structure;

[0059] The position exchange structure includes: a direction-changing pipe 2, a moving frame 16, a moving motor 17, a pair of linear guide rails 18, a pair of slides 19, a conversion frame 20, a conversion motor 21, a rotating shaft 22, and a limit assembly;

[0060] The conversion frame 20 is set on the support surface, the conversion motor 21 is located on the rotating frame, the conversion motor 21 is connected to the docking box 3 through a conversion shaft, and docking ports 23 are set on three adjacent surfaces of the docking box 3. The limit assembly is set on the conversion frame 20;

[0061] The movable frame 16 is located on the supporting surface, a pair of linear guide rails 18 are opened on the movable frame 16, a pair of slides 19 are assembled in the pair of linear guide rails 18, the movable motor 17 is located on the movable frame 16, the driving end of the movable motor 17 is connected to the pair of slides 19, the conversion frame 20 is located on the pair of slides 19, and the docking port 23 is matched with a threaded plug cover 24, and the docking port 23 can be connected to the conveying pipe 1 and the changing pipe 2.

[0062] It should be noted that when the direction of the change-over pipe 2 needs to be adjusted, the moving motor 17 is first controlled to drive the slide 19, and the slide 19 will move on the linear guide rail 18 with the moving frame 16. The moving frame 16 has a docking box 3, and the docking port 23 on the docking box 3 will be disengaged from the docking port 23 of the conveying pipe 1. Then, the conversion motor 21 is controlled to drive the rotating shaft, and the conversion shaft will rotate with the docking box 3 to change the docking port 23 on the docking box 3. After selecting the appropriate docking port 23, the moving motor 17 is controlled to dock the docking port 23 with the conveying pipe 1, and the docking structure is controlled to select one of the other three docking ports 23 on the change-over pipe 2 and the docking box 3. Then, the unused docking port 23 is sealed with a threaded plug cover 24.

[0063] It should be noted that the above design is to realize the transportation of different materials and materials between different processes through a conveying pipe 1 and a changing pipe 2. The implementation of the above technical solution can reduce the cost and investment of designing conveyors between different processes.

[0064] Specifically, the docking structure includes: a pair of electric push rods 25, a pair of docking frames 26, a pair of clamping motors 27, and a pair of arc-shaped fixing members 28;

[0065] A pair of electric push rods 25 are installed on the outer wall of the docking box 3, a pair of docking frames 26 are connected to the telescopic ends of the pair of electric push rods 25, a pair of clamping motors 27 are located on the pair of docking frames 26, and a pair of arc-shaped fixing members 28 are set on the driving ends of the pair of clamping motors 27.

[0066] It should be noted that there are two sets of docking structures, which are respectively located on two of the docking ports 23. A pair of electric push rods 25 is used to push a pair of docking frames 26 forward. When the pair of docking frames 26 allow a pair of arc-shaped fixing members 28 to reach the vicinity of the redirecting pipe 2, a pair of clamping motors 27 are controlled to drive the pair of arc-shaped fixing members 28 to clamp the redirecting pipe 2. The pair of electric push rods 25 pull the pair of docking frames 26 back to dock one end of the redirecting pipe 2 with the docking port 23.

[0067] Specifically, the power system includes: a power transmission box 29, a power motor 30, a driving bevel gear 31, a driven bevel gear 32, and a telescopic motor 33;

[0068] The power transmission box 29 is provided for one end of the conveying pipe 1. A spiral blade 34 is inserted into the conveying pipe 1. One end of the spiral blade 34 passes through the power transmission box 29 and is connected to the driven gear. The telescopic motor 33 is located outside the power transmission box 29. The telescopic end extends into the power transmission box 29 and is connected to the driving end of the power motor 30. The driving end of the power motor 30 is connected to the driving bevel gear 31. The driving bevel gear 31 can mesh with the driven bevel gear 32.

[0069] It should be noted that when materials need to be transported, the power motor 30 can be driven down by the telescopic motor 33, so that the active bevel gear 31 on the driving end of the power motor 30 engages with the driven bevel gear 32 on the spiral blade 34, and then the spiral blade 34 can be rotated to transport the materials. Specifically, a power system is also provided on the changing pipe 2.

[0070] Specifically, the limiting assembly includes: a limiting feed cylinder 35, a limiting wheel 36 with a plurality of limiting teeth, and a limiting card 37;

[0071] The limiting wheel 36 is mounted on the rotating shaft 22, the limiting feed cylinder 35 is located on the outer wall of the conversion frame 20, the limiting cylinder is located on the conversion frame 20, the piston end of the limiting feed cylinder 35 is connected to the limiting card 37, and the limiting card 37 can engage with the limiting wheel 36.

[0072] It should be noted that, in the above description, the limiting feed cylinder 35 in the limiting assembly is used to drive the limiting card 37 forward, so that the limiting card 37 is engaged with the limiting wheel 36 on the rotating shaft 22, thereby fixing the rotating shaft 22.

[0073] Specifically, the hoisting structure includes: a pair of pulling motors 38, a pair of pulling frames 39, and a plurality of telescopic rods 40;

[0074] A pair of pulling motors 38 are arranged on the supporting surface, a pair of pulling frames 39 are connected to the conveying pipe 1, the telescopic ends of the pair of pulling motors 38 are pin-connected to the upper ends of the pulling frames 39 through connecting rods, and a number of telescopic rods 40 are located on the supporting surface and the pulling frames 39.

[0075] It should be noted that the gantry is arranged above the conveying pipeline 1 and spans the conveying pipeline 1. A pair of pulling motors 38 can pull a pair of pulling frames 39 by telescoping, thereby adjusting the height and position of the conveying pipeline 1, and a number of telescopic rods 40 provide auxiliary support; due to the long-term use of the conveying pipeline 1, the position of the conveying pipeline 1 will change, and therefore it cannot be coordinated with the position exchange structure, so the lifting structure is set to achieve fine-tuning of the conveying pipeline 1, and it can also facilitate manual adjustment of the position of the conveying pipeline 1 during later maintenance and repair.

[0076] Specifically, a fastening frame is provided between the pair of pulling motors 38 and the supporting surface.

[0077] Specifically, a motor frame is provided between the conversion frame 20 and the steering motor.

[0078] Specifically, fastening frames are provided at both left and right ends of the plurality of slide rails 7 .

[0079] Specifically, the threaded plug caps 24 are each provided with a rotating handle.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A screw conveyor with drying function, comprising a conveying pipe and a docking box, characterized in that: The conveying pipeline is arranged on the hoisting structure, the conveying pipeline is provided with a power system and a drying structure, and the docking box is provided with an automatic docking structure; The drying structure includes: a drying cover, a lifting structure, a heating structure, and an air intake system; The conveying pipe is a semicircular cover with docking channels at both ends. The drying cover matches the semicircular cover of the conveying pipe. The edge of the drying cover has a strip insertion strip, and the edge of the conveying pipe has a strip insertion groove. The strip insertion strip can be inserted into the strip insertion groove. The lifting structure is arranged at the bottom of the drying cover, and the lifting structure comprises: a plurality of propulsion motors, a plurality of scissor-type telescopic frames, a plurality of slide rails, a plurality of synchronization rods, and a plurality of bases; The base is arranged directly below the drying hood, the slide rail is laid on the base, one end of the bottom of the scissor-type telescopic frame is connected to the base, and the other end is movably connected to the slide rail and can move on the slide rail, the synchronization rod is located on one end of the bottom of the scissor-type telescopic frame connected to the slide rail, the propulsion motor is located on the base, the telescopic end of the propulsion motor is connected to the synchronization rod, and the driving end of the propulsion motor can push the synchronization rod to move; The heating structure includes: a plurality of heating plates, a heating box, and a heating wire; The drying cover has a plurality of mounting slots, the heating plate is embedded in the mounting slots, the heating box is located on the heating plate, and the heating wire is located inside the heating box; The air intake system includes: a number of air inlets, fans, and branch pipes; The plurality of air inlets are embedded in the upper end of the conveying pipeline, the fan is connected to the plurality of air inlets through branch pipes, and the plurality of air inlets are laid at equal angles on the conveying pipeline; Since the conveying pipe is equipped with spiral blades inside, the feed port of the conveying pipe is located on the upper wall of the conveying pipe, while the discharge port is located below the end of the conveying pipe close to the automatic docking structure, and the discharge port is "L" shaped.

2. The screw conveyor with drying function according to claim 1, characterized in that: The docking box is provided with a position exchange structure; The position exchange structure includes: a direction-changing pipe, a moving frame, a moving motor, a pair of linear guide rails, a pair of slides, a conversion frame, a conversion motor, a rotating shaft, and a limit assembly; The conversion frame is arranged on the support surface, the conversion motor is located on the conversion frame, the conversion motor is connected to the docking box through a rotating shaft, the docking box is provided with docking ports on three adjacent surfaces, and the limit assembly is arranged on the conversion frame; The movable frame is located on the supporting surface, a pair of linear guide rails are provided on the movable frame, a pair of slides are assembled in the pair of linear guide rails, the movable motor is located on the movable frame, the driving end of the movable motor is connected to the pair of slides, the conversion frame is located on the pair of slides, and the docking port is matched with a threaded plug cover, and the docking port can be connected to the conveying pipe and the changing pipe.

3. The screw conveyor with drying function according to claim 2, characterized in that: The automatic docking structure comprises: a pair of electric push rods, a pair of docking frames, a pair of clamping motors, and a pair of arc-shaped fixing parts; The pair of electric push rods are installed on the outer wall of the docking box, the pair of docking frames are connected to the telescopic ends of the pair of electric push rods, the pair of clamping motors are located on the pair of docking frames, and the pair of arc-shaped fixing members are arranged on the driving ends of the pair of clamping motors.

4. The screw conveyor with drying function according to claim 1, characterized in that: The power system includes: a power transmission box, a power motor, a driving bevel gear, a driven bevel gear, and a telescopic motor; The power transmission box is arranged for one end of the conveying pipeline, and a spiral blade is inserted in the conveying pipeline. One end of the spiral blade passes through the power transmission box and is connected to the driven gear. The telescopic motor is located outside the power transmission box, and the telescopic end extends into the power transmission box. The telescopic end is connected to the driving end of the power motor, and the driving end of the power motor is connected to the active bevel gear. The active bevel gear can engage with the driven bevel gear.

5. The screw conveyor with drying function according to claim 2, characterized in that: The limiting assembly includes: a limiting feed cylinder, a limiting wheel with a plurality of limiting teeth, and a limiting clip; The limiting wheel is mounted on the rotating shaft, the limiting feed cylinder is located on the outer wall of the conversion frame, the limiting card is located on the conversion frame, the piston end of the limiting feed cylinder is connected to the limiting card, and the limiting card can engage with the limiting wheel.

6. The screw conveyor with drying function according to claim 1, characterized in that: The hoisting structure comprises: a door frame, a pair of pulling motors, a pair of pulling frames, and a plurality of telescopic rods; The pair of pulling motors are arranged on the supporting surface, the pair of pulling frames are connected to the conveying pipe, the telescopic ends of the pair of pulling motors are connected to the upper end of the pulling frame through the connecting rod, and the plurality of telescopic rods are located on the supporting surface and the pulling frame.

7. The screw conveyor with drying function according to claim 6, characterized in that: A fastening frame is provided between the pair of pulling motors and the supporting surface.

8. The screw conveyor with drying function according to claim 2, characterized in that: A motor frame is arranged between the conversion frame and the conversion motor.

9. The screw conveyor with drying function according to claim 1, characterized in that: The left and right ends of the plurality of slide rails are both provided with fastening frames.

10. The screw conveyor with drying function according to claim 2, characterized in that: The threaded plug caps are each provided with a rotating handle.

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