A forced feed screw conveyor

Abstract

The application provides a forced discharging type screw conveying device, which comprises a rack, a material bin arranged on the rack, a feeding port arranged on the material bin, a conveying frame arranged at the bottom of the material bin, a screw conveying mechanism arranged at the bottom of the conveying frame, a arch-breaking mechanism arranged in the material bin and capable of being lifted and rotated, a lifting rod arranged at the bottom of the arch-breaking mechanism, a lifting frame arranged at the bottom of the lifting rod and capable of being lifted in the conveying frame, a pushing plate hinged in the lifting frame, an opening and closing mechanism arranged on the lifting frame and connected with the conveying frame and the pushing plate, the opening and closing mechanism drives the pushing plate to rotate to a horizontal state when the lifting frame is lowered, and drives the pushing plate to rotate to be perpendicular to the lifting frame when the lifting frame is lifted. The device can effectively break the arching and caking problem of the material frame, eliminate the material slip, uneven discharging and material cutting and blocking failure, adapt to the PET material characteristics, improve the discharging stability and conveying precision, reduce the equipment failure, and ensure the efficient and stable operation of the conveying operation.

Description

Technical Field

[0001] This invention specifically relates to a forced-feed screw conveyor device. Background Technology

[0002] In the processing and conveying of PET granules, materials are mostly conveyed and fed using screw conveyors. For example, Chinese invention patent CN104512027A discloses a screw forced feeding device. In this device, the discharge cylinder forms a discharge channel between the storage hopper and the feed inlet. The plastic granules in and above the discharge channel are subjected to downward compression by the screw propulsion blades, thus preventing the plastic granules from getting stuck at the feed inlet, avoiding blockages, ensuring uninterrupted feeding of the sheet extruder, eliminating the need for shutdown for cleaning and maintenance, ensuring smooth production, and improving production efficiency.

[0003] However, due to the physical characteristics of PET granules—lightweight, smooth surface, low inter-granule friction, and easy stacking and bridging—existing conventional screw conveyor feeding equipment has significant technical defects in actual operation. Conventional equipment relies solely on the material's own gravity to complete the material discharge from the hopper, passively conveying the material with the screw. When the amount of PET granules accumulating in the hopper is large, the granules are very prone to interlocking and compressing to form a stable arched bridging structure, causing feeding interruptions.

[0004] Meanwhile, due to the smooth surface of PET granules and their limited self-weight pressure, relative slippage easily occurs between the material and the screw conveyor blades. The screw spins idly, but the material cannot be pushed normally, resulting not only in unstable feeding rate and poor material conveying uniformity, but also frequent local material shortages, material breaks, and feeding failures. In view of this, a forced feeding screw conveyor device is proposed to solve the above problems. Summary of the Invention

[0005] Therefore, it is necessary to provide a forced feeding screw conveyor device to address the problem that existing screw conveyor feeding equipment cannot deliver PET granules. Due to the physical characteristics of PET granules, the material tends to arch in the hopper and slip against the screw conveyor rod, resulting in uneven feeding or even feeding failure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a forced-feed screw conveyor device, comprising: A frame is provided with a hopper, a feed inlet is provided on the hopper, a conveying frame is provided at the bottom of the hopper, and a screw conveying mechanism is provided at the bottom of the conveying frame; An arch-breaking mechanism is installed in the hopper that can be raised, lowered, and rotated. A lifting rod is provided at the bottom of the arch-breaking mechanism, and a lifting frame is provided at the bottom of the lifting rod. The lifting frame is installed in the conveying frame that can be raised and lowered. The pusher plate is hinged within the lifting frame; and An opening and closing mechanism is provided on the lifting frame and connected to the conveying frame and the pusher plate, so as to drive the pusher plate to rotate to a horizontal state when the lifting frame descends, and to drive the pusher plate to rotate to be perpendicular to the lifting frame when the lifting frame rises.

[0007] In one embodiment, the spiral conveying mechanism includes: The first conveying cylinder is arranged horizontally and is connected to the conveying frame. One end of the first conveying cylinder is connected to a second conveying cylinder arranged perpendicularly to it. The first spiral conveyor rod is rotatably disposed inside the first conveying cylinder; and The first motor is fixedly mounted at the end of the first conveying cylinder, and its output shaft is connected to the first screw conveyor rod via a coupling.

[0008] In one embodiment, the arch-breaking mechanism includes: A rotating sleeve is rotatably mounted on the top of the hopper, and a first gear is provided on the rotating sleeve; The drive sleeve is vertically and can be inserted into the rotating sleeve, and multiple sets of arch-breaking hammers are arranged circumferentially at its bottom. The lifting rod is rotatably disposed at the end of the drive sleeve. A second motor is fixedly mounted on the hopper, and a second gear is mounted on its output shaft, the second gear meshing with the first gear; and A lifting assembly is mounted on the hopper and connected to the rotating sleeve to convert the rotation of the rotating sleeve into a drive sleeve for reciprocating lifting.

[0009] In one embodiment, the lifting assembly includes: A reciprocating lead screw is rotatably mounted on the hopper, and a third gear is provided at its end, the third gear meshing with the first gear; and The connecting seat is rotatably connected to the drive sleeve and engages with the reciprocating lead screw.

[0010] In one embodiment, a second spiral conveying rod is rotatably disposed inside the second conveying cylinder, and a drive shaft is disposed on the second spiral conveying rod. The drive shaft is connected to the reciprocating screw via a synchronous belt mechanism.

[0011] In one embodiment, the lifting rod is slidably disposed within the drive sleeve along its axis, and an elastic element is provided between the end of the lifting rod and the inner wall of the drive sleeve.

[0012] In one embodiment, the opening and closing mechanism includes: A slider is disposed on the lifting frame, and a groove is provided on the side wall of the conveying frame, and the slider is slidably engaged in the groove; A shielding component is disposed on the slider to shield the slide groove; A connecting rod is disposed on the pusher plate and rotatably passes through the slider; the end of the connecting rod is provided with a receiving post. A rotating component is disposed on the conveyor frame and connected to the receiving column to drive the receiving column to rotate when the lifting frame is raised or lowered to its limit position.

[0013] In one embodiment, the shielding assembly includes two sets of shielding plates arranged at intervals on the slider. The two sets of shielding plates abut against the inner and outer sides of the conveying frame, respectively. Both ends of the shielding plate located on the inner side of the conveying frame are provided with inclined surfaces.

[0014] In one embodiment, the rotating component includes: A support frame is fixedly installed on one side of the baffle plate, and a drive column is provided on the support frame that can be raised and lowered, and the drive column is interference-fitted with the support frame; Two sets of limiting frames are arranged at intervals and are both located on the side wall of the conveyor frame; and abutment posts are provided on opposite sides of the two sets of limiting frames; and A transmission unit is disposed on the drive column and connected to the receiving column to convert the lifting and lowering of the drive column into driving the rotation of the receiving column and to self-lock.

[0015] In one embodiment, the transmission unit includes: A transverse frame is slidably mounted on the support frame and has an inclined groove, both ends of which are connected to a flat groove. The first propulsion column is disposed on the drive column and is slidably engaged within one of the set of flat grooves; and The second propulsion column is mounted on the transverse frame. The receiving column has a spiral groove, and both ends of the spiral groove are connected to straight grooves. The second propulsion column is slidably engaged in one of the straight grooves.

[0016] Compared with the prior art, the present invention has at least the following advantages: During operation, this device utilizes a rotating and lifting arch-breaking mechanism within the hopper to break up arches, voids, and clumps formed by accumulated PET material. This prevents material stagnation caused by arching and ensures a continuous and orderly descent of material from the hopper. Simultaneously, the lifting frame rises and falls synchronously with the arch-breaking mechanism. In conjunction with the opening and closing mechanism, the pusher plate adaptively rotates. When the lifting frame descends, the pusher plate unfolds horizontally, actively pushing material within the conveyor frame and eliminating slippage between the material and the spiral conveyor rod. This ensures full contact between the material and the spiral structure. When the lifting frame rises, the pusher plate automatically retracts vertically, preventing obstruction of continuous material flow. Through the coordinated operation of the arch-breaking and opening / closing mechanisms, the device resolves issues such as material jamming, uneven distribution, and material interruptions caused by clumps and arches. This significantly improves the stability and continuity of material flow, effectively adapts to the physical properties of PET material, and substantially enhances material conveying accuracy and operational efficiency. It also reduces the probability of equipment idling, blockages, and shutdowns, ensuring stable operation of the conveying process. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A three-dimensional structural diagram of a forced feeding screw conveyor provided by the present invention; Figure 2 This is a cross-sectional view of a forced-feed screw conveyor device according to the present invention; Figure 3 This is a schematic diagram of the hopper structure in a forced-feed screw conveyor of the present invention; Figure 4 This is a schematic diagram of the installation structure of the lifting frame and its upper parts in a forced feeding screw conveyor according to the present invention. Figure 5 This is a schematic diagram of the lifting frame in a forced feeding screw conveyor of the present invention; Figure 6 This is a schematic diagram of the pusher plate in a forced feeding screw conveyor according to the present invention; Figure 7 for Figure 6 An enlarged schematic diagram of region A in the middle.

[0019] Figure label: 1. Hopper; 2. Feed inlet; 3. Conveyor frame; 4. First conveyor cylinder; 5. Second conveyor cylinder; 6. First spiral conveyor rod; 7. First motor; 8. Slide chute; 9. Limiting frame; 10. Abutment post; 11. Second spiral conveyor rod; 12. Drive shaft; 13. Rotating sleeve; 14. First gear; 15. Second motor; 16. Second gear; 17. Drive sleeve; 18. Arch-breaking hammer; 19. Lifting rod; 20. Elastic element; 21. 1. Connecting seat; 22. Reciprocating lead screw; 23. Third gear; 24. Synchronous belt mechanism; 25. Lifting frame; 26. Slider; 27. Baffle plate; 28. Inclined surface; 29. ​​Support frame; 30. Push plate; 31. Connecting rod; 32. Support column; 33. Spiral groove; 34. Straight groove; 35. Transverse frame; 36. Second push column; 37. Inclined groove; 38. Flat groove; 39. Drive column; 40. First push column; 41. Frame. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] Example: Please see Figure 1 , 2The present invention provides a forced feeding screw conveyor device, including a frame 41, a hopper 1 on the frame 41, a feed inlet 2 on the hopper 1, a conveying frame 3 at the bottom of the hopper 1, and a screw conveying mechanism at the bottom of the conveying frame 3. The screw conveying mechanism includes a first conveying cylinder 4 arranged horizontally, which is connected to the conveying frame 3. One end of the first conveying cylinder 4 is connected to a second conveying cylinder 5 arranged perpendicularly thereto. A first screw conveying rod 6 is rotatably arranged inside the first conveying cylinder 4. A first motor 7 is fixedly arranged at the end of the first conveying cylinder 4. The output shaft of the first motor 7 is connected to the first screw conveying rod 6 through a coupling.

[0024] The hopper 1 is supported by the frame 41, and PET material can be added through the feed port 2. The material can fall into the first conveying cylinder 4 through the conveying frame 3, and the first spiral conveying rod 6 is driven by the first motor 7 to rotate and convey the material into the second conveying cylinder 5 and discharge it.

[0025] Please see Figures 1 to 3 In this embodiment, a diaphragm-breaking mechanism is provided in the hopper 1, which is both liftable and rotatable. A lifting rod 19 is provided at the bottom of the diaphragm-breaking mechanism, and a lifting frame 25 is provided at the bottom of the lifting rod 19. The lifting frame 25 is rotatably arranged in the conveying frame 3. The diaphragm-breaking mechanism includes a rotating sleeve 13 rotatably arranged at the top of the hopper 1. A first gear 14 is provided on the rotating sleeve 13. A drive sleeve 17 is rotatably passed through the rotating sleeve 13. Multiple sets of diaphragm-breaking hammers 18 are arranged circumferentially at the bottom of the drive sleeve 17. The lifting rod 19 is rotatably arranged at the end of the drive sleeve 17. A second motor 15 is fixedly arranged on the hopper 1. A second gear 16 is provided on the output shaft of the second motor 15. The second gear 16 meshes with the first gear 14.

[0026] The arch-breaking mechanism also includes a lifting assembly mounted on the hopper 1 and connected to the rotating sleeve 13. The lifting assembly converts the rotation of the rotating sleeve 13 into a control drive sleeve 17 for reciprocating lifting. The lifting assembly includes a reciprocating screw 22 rotatably mounted on the hopper 1. A third gear 23 is provided at the end of the reciprocating screw 22, which meshes with the first gear 14. A connecting seat 21 is rotatably mounted on the drive sleeve 17, and the connecting seat 21 cooperates with the reciprocating screw 22.

[0027] The second motor 15 can be started to drive the second gear 16 to rotate. During the rotation of the second gear 16, it can drive the rotating sleeve 13 to rotate through meshing with the first gear 14, thereby controlling the rotation of the drive sleeve 17. During the rotation of the drive sleeve 17, multiple sets of arch-breaking hammers 18 are used to stir and break up the material. Furthermore, the reciprocating screw 22 can be driven to rotate through the meshing of the third gear 23 with the first gear 14. The reciprocating screw 22, through cooperation with the connecting seat 21, drives the drive sleeve 17 to move up and down reciprocally, effectively preventing the material from forming arches at any position in the hopper 1.

[0028] Please see Figure 1 , 2 In this embodiment, a second spiral conveying rod 11 is rotatably mounted inside the second conveying cylinder 5. A drive shaft 12 is mounted on the second spiral conveying rod 11, and the drive shaft 12 is connected to the reciprocating screw 22 via a synchronous belt mechanism 24. During rotation, the reciprocating screw 22 can also drive the second spiral conveying rod 11 to rotate via the synchronous belt mechanism 24, thereby achieving forced feeding of materials through cooperation with the first spiral conveying rod 6.

[0029] Please see Figure 2 , 4 In this embodiment, a pusher plate 30 is hinged to the upper part of the lifting frame 25, and the lifting rod 19 is slidably disposed in the drive sleeve 17 along its axis. An elastic element 20 is provided between the end of the lifting rod 19 and the inner wall of the drive sleeve 17. When the lifting frame 25 descends, the pusher plate 30 can be controlled to close, so that the lifting frame 25 and the pusher plate 30 cooperate to form a pusher plate structure, thereby applying downward pressure to the material in the conveying frame 3, so that the first spiral conveying rod 6 can fully convey the material, avoiding the material from slipping and arching, which would lead to material breakage. Furthermore, the position of the lifting frame 25 can be automatically adjusted when there is too much material in the conveying frame 3 through the arrangement of the elastic element 20. When the lifting frame 25 rises, the pusher plate 30 can also be controlled to rotate and open, so that the material can fall directly into the conveying frame 3.

[0030] Please see Figures 3 to 5 In this embodiment, the lifting frame 25 is provided with an opening and closing mechanism connected to the conveying frame 3 and the pusher plate 30. The opening and closing mechanism drives the pusher plate 30 to rotate to a horizontal state when the lifting frame 25 descends, and drives the pusher plate 30 to rotate to be perpendicular to the lifting frame 25 when the lifting frame 25 rises. The opening and closing mechanism includes a slider 26 provided on the lifting frame 25. A groove 8 is opened on the side wall of the conveying frame 3. The slider 26 is slidably locked in the groove 8. A blocking component is provided on the slider 26 to block the groove 8. A connecting rod 31 is also provided on the pusher plate 30. The connecting rod 31 is rotatably inserted into the slider 26. A receiving post 32 is provided at the end of the connecting rod 31.

[0031] The shielding assembly includes two sets of shielding plates 27 arranged at intervals on the slider 26. The two sets of shielding plates 27 abut against the inner and outer sides of the conveying frame 3 respectively. Both ends of the shielding plate 27 located on the inner side of the conveying frame 3 are provided with inclined surfaces 28.

[0032] The rotating of the receiving column 32 can drive the rotating of the pusher plate 30. During the lifting process, the lifting frame 25 can block the slide 8 through the baffle plate 27 to prevent PET particles from falling out of the slide 8. Furthermore, through the arrangement of the inclined surface 28, the inner set of baffle plates 27 can be inserted into the gap between the conveying frame 3 and the material particles during the sliding process, preventing the particles from getting stuck in the baffle plate 27 and causing the gap to be too large and jammed.

[0033] Please see Figures 5 to 7 In this embodiment, the opening and closing mechanism further includes a rotating assembly disposed on the conveying frame 3 and connected to the receiving column 32. The rotating assembly drives the receiving column 32 to rotate when the lifting frame 25 is raised to its limit position. The rotating assembly includes a support frame 29 fixedly disposed on one side of the baffle plate 27. A drive column 39 is mounted on the support frame 29 and is press-fitted with the support frame 29. Two sets of limiting frames 9 are arranged at intervals on the side wall of the conveying frame 3. Abutment columns 10 are provided on the opposite sides of the two sets of limiting frames 9. The abutment columns 10 are provided on the opposite sides of the two sets of limiting frames 9 and are equipped with a transmission part connected to the receiving column 32. The transmission part converts the raising and lowering of the drive column 39 into the rotation of the receiving column 32 and self-locks it.

[0034] The transmission unit includes a transverse frame 35 that is slidably mounted on a support frame 29. The transverse frame 35 has an inclined groove 37, and both ends of the inclined groove 37 are connected to a flat groove 38. A first push column 40 is mounted on a drive column 39. The first push column 40 is slidably engaged in one of the flat grooves 38. A second push column 36 is mounted on the transverse frame 35. A spiral groove 33 is mounted on a receiving column 32. Both ends of the spiral groove 33 are connected to a straight groove 34. The second push column 36 is slidably engaged in one of the straight grooves 34.

[0035] When the lifting frame 25 reaches its limit position, the drive column 39 can abut against the corresponding abutment column 10 and slide on the support frame 29. During the sliding process, the drive column 39 can drive the first push column 40 to slide, so that the first push column 40 and the inclined groove 37 cooperate to drive the transverse frame 35 to slide as a whole until the first push column 40 slides into another set of flat grooves 38 to lock the position of the transverse frame 35. During the sliding process, the transverse frame 35 can drive the receiving column 32 to rotate through the cooperation of the second push column 36 and the spiral groove 33, thereby driving the push plate 30 to rotate. The second push column 36 and the cooperation of another set of straight grooves 34 lock the position of the receiving column 32, so that when the lifting frame 25 reaches its limit position, the push plate 30 is driven to rotate and open. When the lifting frame 25 moves down, the push plate 30 is in a horizontal state to push material. When the lifting frame 25 moves up, the push plate 30 is in a vertical state to supply material into the conveying frame 3.

[0036] Specific usage and beneficial effects of the present invention: During operation, this device controls the movement of a rotating and lifting arch-breaking mechanism within the hopper 1 to break up arches, voids, and clumps formed by accumulated PET material. This prevents material stagnation caused by arching and ensures a continuous and orderly descent of material from the hopper 1. Simultaneously, the lifting frame 25 rises and falls synchronously with the arch-breaking mechanism. In conjunction with the opening and closing mechanism, the pusher plate 30 adaptively rotates. When the lifting frame 25 descends, the pusher plate 30 unfolds horizontally, actively pushing the material within the conveying frame 3. This eliminates slippage between the material and the spiral conveyor, ensuring full contact between the material and the spiral structure. When the lifting frame 25 rises, the pusher plate 30 automatically retracts vertically, preventing obstruction of continuous material flow. Through the coordinated operation of the arch-breaking mechanism and the opening and closing mechanism, the device resolves issues such as material jamming, uneven distribution, and material breakage caused by clumps and arches. This significantly improves the stability and continuity of material flow, effectively adapts to the physical properties of PET material, significantly enhances material conveying accuracy and operational efficiency, reduces the probability of equipment idling and material blockage shutdowns, and ensures stable operation of the conveying process.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A forced-feed screw conveyor device, characterized in that, Including: A frame (41) is provided with a hopper (1), a feed inlet (2) is provided on the hopper (1), a conveying frame (3) is provided at the bottom of the hopper (1), and a screw conveying mechanism is provided at the bottom of the conveying frame (3). The arch-breaking mechanism is installed in the hopper (1) in a liftable and rotatable manner. The bottom of the arch-breaking mechanism is provided with a lifting rod (19), and the bottom of the lifting rod (19) is provided with a lifting frame (25). The lifting frame (25) is installed in the conveying frame (3) in a liftable manner. The pusher plate (30) is hinged within the lifting frame (25); and An opening and closing mechanism is provided on the lifting frame (25) and connected to the conveying frame (3) and the pusher plate (30) to drive the pusher plate (30) to rotate to a horizontal state when the lifting frame (25) descends, and to drive the pusher plate (30) to rotate to be perpendicular to the lifting frame (25) when the lifting frame (25) rises.

2. The forced-feed screw conveyor according to claim 1, characterized in that, The spiral conveying mechanism includes: The first conveying cylinder (4) is arranged horizontally and is connected to the conveying frame (3). One end of the first conveying cylinder (4) is connected to a second conveying cylinder (5) arranged perpendicularly to it. The first spiral conveyor rod (6) is rotatably disposed inside the first conveyor cylinder (4); and The first motor (7) is fixedly installed at the end of the first conveying cylinder (4), and its output shaft is connected to the first spiral conveying rod (6) through a coupling.

3. The forced-feed screw conveyor device according to claim 2, characterized in that, The arch-breaking mechanism includes: A rotating sleeve (13) is rotatably mounted on the top of the hopper (1), and a first gear (14) is mounted on the rotating sleeve (13). The drive sleeve (17) is vertically and vertically inserted into the rotating sleeve (13), and multiple sets of arch-breaking hammers (18) are arranged circumferentially at its bottom. The lifting rod (19) is rotatably disposed at the end of the drive sleeve (17). The second motor (15) is fixedly installed on the hopper (1), and a second gear (16) is provided on its output shaft. The second gear (16) meshes with the first gear (14). and A lifting assembly is provided on the hopper (1) and connected to the rotating sleeve (13) to convert the rotation of the rotating sleeve (13) into driving the drive sleeve (17) to reciprocate and lift.

4. A forced-feed screw conveyor according to claim 3, characterized in that, The lifting assembly includes: A reciprocating lead screw (22) is rotatably mounted on the hopper (1), and a third gear (23) is provided at its end, the third gear (23) meshing with the first gear (14); and The connecting seat (21) is rotatably connected to the drive sleeve (17) and cooperates with the reciprocating lead screw (22).

5. A forced-feed screw conveyor according to claim 4, characterized in that: The second conveying cylinder (5) is rotatably provided with a second spiral conveying rod (11), and a drive shaft (12) is provided on the second spiral conveying rod (11). The drive shaft (12) is connected to the reciprocating screw (22) through a synchronous belt mechanism (24).

6. A forced-feed screw conveyor according to claim 3, characterized in that: The lifting rod (19) is slidably disposed in the drive sleeve (17) along its axis, and an elastic element (20) is provided between the end of the lifting rod (19) and the inner wall of the drive sleeve (17).

7. A forced-feed screw conveyor according to claim 3, characterized in that, The opening and closing mechanism includes: A slider (26) is provided on the lifting frame (25). The side wall of the conveying frame (3) is provided with a groove (8), and the slider (26) is slidably engaged in the groove (8). A shielding component is disposed on the slider (26) to shield the groove (8); A connecting rod (31) is disposed on the pusher plate (30) and rotatably passes through the slider (26). A receiving post (32) is provided at the end of the connecting rod (31). A rotating assembly is disposed on the conveying frame (3) and connected to the receiving column (32) to drive the receiving column (32) to rotate when the lifting frame (25) is raised to its limit position.

8. A forced-feed screw conveyor according to claim 7, characterized in that: The shielding assembly includes two sets of shielding plates (27) arranged at intervals on the slider (26). The two sets of shielding plates (27) respectively abut against the inner and outer sides of the conveying frame (3). Both ends of the shielding plate (27) located on the inner side of the conveying frame (3) are provided with inclined surfaces (28).

9. A forced-feed screw conveyor according to claim 8, characterized in that, The rotating component includes: A support frame (29) is fixedly installed on one side of the baffle plate (27). A drive column (39) is provided on the support frame (29) and can be raised and lowered. The drive column (39) is interference-fitted with the support frame (29). Two sets of limiting frames (9) are arranged at intervals and are both located on the side wall of the conveying frame (3). Abutment posts (10) are provided on opposite sides of the two sets of limiting frames (9); and The transmission unit is disposed on the drive column (39) and connected to the receiving column (32) to convert the lifting of the drive column (39) into driving the receiving column (32) to rotate and self-lock.

10. A forced-feed screw conveyor according to claim 9, characterized in that, The transmission unit includes: A transverse frame (35) is slidably mounted on the support frame (29) and has an inclined groove (37) provided. Both ends of the inclined groove (37) are connected to a flat groove (38). The first propulsion column (40) is disposed on the drive column (39) and is slidably engaged within one of the set of flat grooves (38); and The second propulsion column (36) is mounted on the transverse frame (35). The receiving column (32) has a spiral groove (33) and both ends of the spiral groove (33) are connected to straight grooves (34). The second propulsion column (36) is slidably mounted in one of the straight grooves (34).

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