Hanging type hopper with double doors

Abstract

The hanging type hinged door hopper comprises a hanging frame and a stock bin rotationally connected to the hanging frame, the stock bin is in a closed cylindrical shape, the rotating axis of the stock bin is in the horizontal direction, a feeding and discharging opening is formed in the bottom of the stock bin, a pair of hinged door leaves cover the feeding and discharging opening, and the hinged door leaves are arranged on the upper portion of the stock bin. The bottom of each door leaf is in a circular arc shape corresponding to the stock bin, the two sides of each door leaf are rotationally connected with the two sides of the stock bin respectively, the rotating axis of each door leaf is coaxial with the axis of the stock bin, and a door opening and closing mechanism used for driving the two door leaves to be opened or closed is arranged on the stock bin. And a driving mechanism for driving the stock bin to rotate is arranged on the hanging bracket. When the concrete bin is moved, the feeding and discharging port and the door leaf face upwards, so that concrete in the concrete bin cannot leak, waste cannot be generated, and pollution to the surrounding environment cannot be caused.

Description

Technical Field

[0001] The invention relates to the technical field of concrete pouring equipment, in particular to a hanging type double-door hopper. Background Art

[0002] The hopper is a common device for concrete pouring. First, concrete is poured into the hopper, and then the hopper is hoisted to the top of the mold to be poured by a crane. After that, the door at the bottom of the hopper is opened, and the concrete flows out of the hopper under the action of gravity and falls into the mold, thus realizing the pouring of concrete. When one mold is poured, the door is closed, and the hopper is hoisted to the top of the next mold, and the above pouring process is repeated.

[0003] Since concrete is composed of water, cement and aggregates, after pouring, the door at the bottom of the hopper is easily clamped by aggregates and not closed tightly, causing concrete to leak when the hopper is moved and fall onto the workplace, which not only causes waste but also pollutes the workplace. Especially after a period of use, the gap in the door will become larger due to long-term friction with the concrete, making it more likely to leak.

[0004] In addition, after the pouring operation is completed, the inside of the hopper needs to be flushed to prevent the concrete from solidifying in the hopper and affecting the next use. Since the feed port of the hopper is located at the top of the hopper, the operator needs to stand at a high place and use a water gun to flush the inside of the hopper. Since the injection port at the top is small, the flushing is not only inconvenient to operate, time-consuming and labor-intensive, and not easy to flush clean, but also there is a risk of people falling.

[0005] The patent application with publication number CN219548403U discloses a leak-proof concrete hopper, which is provided with a baffle plate, and a plug plate is provided on the baffle plate. When the hopper needs to transfer concrete, the staff rotates the baffle plate at the bottom of the second mounting frame so that the plug plate at one end of the baffle plate is inserted into the slot at the bottom of the first mounting frame, thereby blocking the discharge barrel at the bottom of the hopper. When it is necessary to unload, the plug plate is taken out of the slot, the baffle plate is rotated to move the baffle plate away from the discharge barrel, and then the concrete in the hopper can be unloaded from the discharge barrel. Since the concrete is in a falling state after the baffle plate is removed, it is difficult to manually install the baffle plate into the slot again, so the hopper is only suitable for one-time concrete pouring. In addition, after repeated use, the baffle plate and the slot are worn, the gap becomes larger, and leakage will also occur. The patent application with publication number CN205688294U discloses a ballastless track self-compacting concrete pouring discharge hopper, including a hopper, a slot is provided at the bottom of the hopper side wall, and the slot is matched with a plug-in valve. Since the concrete outflow from the hopper is controlled by the plug-in, the plug-in may cause the gap to become larger due to wear, thereby causing leakage. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a hanging double-door hopper, which is used to solve the problem that concrete leakage is easy to occur in the current hopper during movement.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A hanging double-door hopper includes a hanger and a silo rotatably connected to the hanger, the silo is a closed cylindrical shape, the rotation axis of the silo is horizontal, an inlet and outlet are provided at the bottom of the silo, the inlet and outlet are covered with a pair of double-door leaves, the bottom of the door leaves are arc-shaped corresponding to the silo, the two sides of the door leaves are rotatably connected to the two sides of the silo respectively, the rotation axis of the door leaves is coaxial with the axis of the silo, the silo is provided with a switch door mechanism for driving the two door leaves to open or close, and the hanger is provided with a driving mechanism for driving the silo to rotate.

[0009] Furthermore, the driving mechanism includes a box body, a box cover and a reduction motor which are fixedly connected to the outside of the hanger in sequence, a first gear ring coaxial with the silo is fixedly arranged in the box cover, a driving shaft coaxial with the first gear ring is arranged in the box body, the driving shaft is rotatably connected to the box cover, the driving shaft is transmission connected to the reduction motor, a driving gear is transmission connected to the driving shaft, a planetary gear is arranged between the driving gear and the first gear ring, and the driving gear and the first gear ring are both meshed with the planetary gear; an outer rotating sleeve is rotatably connected through the box body, the planetary gear is rotatably connected to one end of the outer rotating sleeve, and the other end of the outer rotating sleeve is fixedly connected to the silo.

[0010] Furthermore, an agitator is rotatably connected in the silo, the agitator shaft of the agitator is coaxial with the silo, an inner sleeve is rotatably connected in the outer sleeve, the inner sleeve is coaxial with the driving gear, one end of the inner sleeve is transmission-connected to the agitator shaft, and the other end of the inner sleeve is fixedly connected with a second gear ring, the driving gear is movably connected to the driving shaft, and a displacement structure for driving the driving gear to move axially is provided on the driving shaft. Driven by the displacement structure, the driving gear has two working positions on the driving shaft; when the driving gear reaches one of the working positions, the driving gear meshes with the planetary gear, and when the driving gear reaches the other working position, the driving gear meshes with the second gear ring.

[0011] Furthermore, the displacement structure is a spline arranged on the outer circle of the driving shaft, the spline is spiral, and the driving shaft is transmission-connected to the driving gear via the spline.

[0012] Furthermore, the door opening and closing mechanism includes two sector gears arranged in sequence outside the silo along the axis of the silo, the directions of the teeth on the two sector gears correspond to the two door leaves respectively, the two sector gears are fixedly connected to the corresponding door leaves respectively, the two sector gears are rotatably connected to the silo, a sliding frame is provided outside the two sector gears, two parallel racks are fixedly provided in the sliding frame, the two racks are respectively meshed with the corresponding sector gears, and a hydraulic cylinder for driving the rack to move linearly is provided on the silo.

[0013] Furthermore, a pair of parallel slide rails are provided between the slide frame and the silo, the slide rails are parallel to the rack, the hydraulic cylinder is parallel to the slide rails, the track of the slide rails is fixedly connected to the silo, the slider of the slide rails is fixedly connected to the slide frame, and the two ends of the hydraulic cylinder are respectively hinged to the slide frame and the silo.

[0014] Furthermore, an electromagnetic brake for locking the position of the outer rotating sleeve is provided on the hanger.

[0015] Furthermore, a swivel is provided on both sides of the driving gear, the swivel is coaxial with the driving gear, and the inner swivel sleeve and the box cover are rotatably connected to the corresponding swivels respectively.

[0016] The positive effects of the present invention are:

[0017] The present invention is provided with a hanger and a cylindrical silo, the silo is provided with an inlet and outlet, the inlet and outlet are covered with a double-leaf door leaf, and the silo is provided with an opening and closing door mechanism and a driving mechanism for driving the silo to rotate. Since the inlet and outlet and the door leaf are downward only when pouring concrete into the mold, the inlet and outlet and the door leaf are upward when the present invention moves, so the concrete in the silo will not leak, so there will be no waste, and no pollution to the surrounding environment. When flushing the silo, the inlet and outlet are downward or obliquely downward, and the operator can stand on the ground and hold a water gun to flush the inside of the silo, without standing in a high place, so there is no risk of falling. During the flushing process, the driving mechanism drives the silo to rotate, so that various places inside the silo can be flushed, reducing flushing dead angles, and making the inside of the silo flush more cleanly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 yes Figure 1 Cross-sectional view of the middle AA part;

[0020] Figure 3 yes Figure 1 An enlarged view of the middle door opening and closing mechanism;

[0021] Figure 4 It is a schematic diagram of the structure of the driving mechanism when the driving gear is meshing with the planetary gear;

[0022] Figure 5 is a structural schematic diagram of the driving mechanism when the driving gear is meshing with the second gear ring;

[0023] Figure 6 It is a schematic diagram of the appearance of the drive shaft;

[0024] In the figure:

[0025] 1. Door leaf; 2. Rack; 3. Fan gear; 4. Slide frame; 5. Hydraulic cylinder; 6. Hanger; 7. First gear ring; 8. Agitator shaft; 9. Silo; 10. Inlet and outlet; 11. Slide rail; 12. Connector; 13. Electromagnetic brake; 14. Box body; 15. Outer rotating sleeve; 16. Inner rotating sleeve; 17. Second gear ring; 18. Box cover; 19. Reducer motor; 20. Drive shaft; 21. Swivel; 22. Driving gear; 23. Planetary gear. DETAILED DESCRIPTION

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a hanging double-door hopper includes a herringbone hanger 6 and a silo 9 rotatably connected to the hanger 6. The silo 9 is a cylindrical shape with both ends closed, and the rotation axis of the silo 9 is in the horizontal direction. The bottom of the silo 9 is provided with a long strip of inlet and outlet ports 10, and the inlet and outlet ports 10 are covered with a pair of double-door leaves 1. The bottom of the door leaf 1 is an arc shape corresponding to the outer wall of the silo 9, and both sides of the door leaf 1 are bent upward, and both sides of the door leaf 1 are fan-shaped. The two sides of the door leaf 1 are rotatably connected to the two sides of the silo 9 respectively, and the rotation axis of the door leaf 1 is coaxial with the axis of the silo 9.

[0028] A door opening and closing mechanism for driving the two door leaves 1 to open or close is disposed on the left side of the silo 9 , and a driving mechanism for driving the silo 9 to rotate is disposed on the right side of the hanger 6 .

[0029] The working process of the present invention is:

[0030] 1. The driving mechanism drives the silo 9 to rotate so that the inlet and outlet 10 faces upward, and the door opening and closing structure drives the two door leaves 1 to rotate in opposite directions and open them in a split manner, and then concrete is poured into the silo 9, and then the door opening and closing mechanism closes the two door leaves 1.

[0031] 2. Lift the silo 9 through the hanger 6 and lift it above the mold to be poured with concrete. The drive mechanism drives the silo 9 to rotate so that the inlet and outlet 10 faces downward. Then the door opening and closing mechanism opens the two door leaves 1 and controls the flow rate of concrete pouring by controlling the gap between the two door leaves. After pouring the mold, the door opening and closing mechanism closes the two door leaves 1, and the drive mechanism drives the silo 9 to rotate so that the inlet and outlet 10 faces upward.

[0032] 3. The crane lifts the silo 9 to the next mold to be poured, and repeats the above steps to carry out the next pouring.

[0033] Since the inlet and outlet ports 10 of the present invention are always kept facing upwards when the device is moving, the concrete in the silo 9 will not leak, thus no waste will be generated and no pollution will be caused to the surrounding environment.

[0034] After pouring the current batch of molds, the concrete in the silo 9 is drained, the present invention is hoisted to the flushing station, the driving mechanism drives the silo 9 to rotate, so that the inlet and outlet 10 is downward or obliquely downward, the door opening and closing mechanism opens the two door leaves 1, and the operator can stand on the ground and hold a water gun to flush the inside of the silo 9, without standing at a high place, so there is no risk of falling. During the flushing process, the driving mechanism drives the silo 9 to rotate, so that various places inside the silo 9 can be flushed, reducing the flushing dead angle, and making the inside of the silo 9 flushed more cleanly.

[0035] Example 2

[0036] Combination Figure 4 and Figure 5 As shown, the difference between this embodiment and embodiment 1 is that:

[0037] The driving mechanism includes a box body 14, a box cover 18 and a reduction motor 19 which are fixedly connected to the outside of the right end of the hanger 6 from left to right. A first gear ring 7 coaxial with the silo 9 is fixedly arranged in the box cover 18, and a driving shaft 20 coaxial with the first gear ring 7 is arranged in the box body 14. The right part of the driving shaft 20 is connected to the box cover 18 through rotation, and the right end of the driving shaft 20 is inserted into the hollow output shaft of the reduction motor 19 and is keyed to the output shaft.

[0038] The middle part of the driving shaft 20 is connected to a driving gear 22, and three planetary gears 23 are arranged between the driving gear 22 and the first gear ring 7, and the driving gear 22 and the first gear ring 7 are meshed with the planetary gears 23. An outer sleeve 15 is arranged inside the housing 14, and the diameter of the outer sleeve 15 is larger on the left and smaller on the right. The left part of the outer sleeve 15 is connected to the housing 14 for rotation, and the right end of the outer sleeve 15 is connected to the three planetary gears 23 for rotation near the edge, and the left end of the outer sleeve 15 is fixedly connected to the right side of the silo 9 through a connector 12 arranged between the outer sleeve 15 and the silo 9.

[0039] When the reduction motor 19 is running, the driving shaft 20 drives the driving gear 22 to rotate. Under the action of the driving gear 22 and the first ring gear 7, the three planetary gears 23 rotate around the driving gear 22, thereby driving the outer rotating sleeve 15 to rotate, and then driving the silo 9 to rotate through the connecting body 12.

[0040] An agitator is rotatably connected in the silo 9 , and the agitator shaft 8 of the agitator is coaxial with the silo 9 . An inner rotating sleeve 16 is rotatably connected in the outer rotating sleeve 15 . The left end of the drive shaft 20 is rotatably connected to the inner rotating sleeve 16 , and the inner rotating sleeve 16 is coaxial with the driving gear 22 .

[0041] The inner rotating sleeve 16 has a smaller diameter on the left and a larger diameter on the right. The left part of the inner rotating sleeve 16 is a solid shaft head, and the right end is a hollow ring. The left end of the inner rotating sleeve 16 is connected to the stirring shaft 8 through a coupling, and the right end of the inner rotating sleeve 16 is fixedly connected to the second gear ring 17. The driving gear 22 is movably connected to the driving shaft 20, that is, the driving gear 22 can move axially on the driving shaft 20 while being connected to the driving shaft 20.

[0042] The number of teeth of the second gear ring 17 is equal to that of the driving gear 22 , so the driving gear 22 is embedded in the second gear ring 17 after meshing with the second gear ring 17 , and the rotation speed of the second gear ring 17 is equal to that of the driving gear 22 .

[0043] The driving shaft 20 is provided with a displacement structure for driving the driving gear 22 to move axially. Driven by the displacement structure, the driving gear 22 moves axially on the driving shaft 20, so that the driving gear 22 has two working positions on the driving shaft 20. When the driving gear 22 moves to the right to one of the working positions, the driving gear 22 meshes with the planetary gear 23. At this time, the reduction motor 19 drives the driving gear 22 to rotate, and drives the outer rotating sleeve 15 to rotate through the planetary gear 23, so that the silo 9 rotates. When the driving gear 22 moves to the left to another working position, the driving gear 22 meshes with the second gear ring 17. When the reduction motor 19 is running, the second gear ring 17 is driven to rotate through the driving gear 22, and then the stirring shaft 8 is driven to rotate through the inner rotating sleeve 16 to stir the concrete in the silo 9, so as to prevent the aggregate of the concrete from being deposited at the bottom of the silo 9, thereby causing the proportions of the various components of the concrete to differ too much during pouring, affecting the product quality of the concrete components after pouring.

[0044] like Figure 6 As shown, the displacement structure is a spline arranged on the outer circle of the driving shaft 20, and the spline is spiral. The driving shaft 20 is transmission-connected with the driving gear 22 via the spline. Therefore, when the driving shaft 20 drives the driving gear 22 to rotate, an axial force is applied to the driving gear 22.

[0045] exist Figure 6 In the example, the spline has a right-hand rotation. Figure 4 As shown, when the drive shaft 20 rotates clockwise (viewed from the right end of the drive shaft 20 to the left), the driving gear 22 is subjected to an axial force to the right, so the driving gear 22 moves to the right along the drive shaft 20 and meshes with the planetary gear 23.

[0046] like Figure 5 As shown, when the drive shaft 20 rotates counterclockwise (viewed from the right end of the drive shaft 20 to the left), the driving gear 22 is subjected to an axial force to the left, so the driving gear 22 moves to the left along the drive shaft 20 and meshes with the planetary gear 23.

[0047] Therefore, the driving gear 22 can be switched between two working positions by changing the direction of the driving shaft 20, that is, changing the direction of the reduction motor 19, without the need for additional switching devices, thereby making the switching structure simpler and more reliable.

[0048] Since the driving gear 22 drives the silo 9 to rotate through the planetary gear 23 in one working position, and drives the stirring shaft 8 to rotate through the second ring gear 17 in another working position, and since the output speed of the reduction motor 19 is constant, the silo 9 rotates at a low speed and the stirring shaft 8 rotates at a high speed, which just meets the requirements that the silo 9, due to its large size and weight, requires a low speed to ensure stability during rotation and avoid danger, and the agitator requires a higher speed to avoid aggregate settlement in concrete.

[0049] like Figure 4 and Figure 5 As shown, an electromagnetic brake 13 is installed on the left side of the hanger 6. When the electromagnetic brake 13 is actuated, the outer rotating sleeve 15 can be tightened or loosened. This technology is a prior art and has been widely used in winches, so it will not be described in detail here.

[0050] A swivel 21 is provided on both sides of the driving gear 22. The swivel 21 is sleeved outside the driving shaft 20. The swivel 21 is coaxial with the driving gear 22. The inner swivel sleeve 16 and the box cover 18 are rotatably connected to the corresponding swivel 21 through bearings. When the driving gear 22 reaches two working positions, it is tightly attached to the corresponding swivel 21, thereby reducing the resistance encountered by the driving gear 22 when rotating.

[0051] Example 3

[0052] like Figures 1 to 3 As shown, the difference between this embodiment and embodiment 2 is that:

[0053] The door opening and closing mechanism includes two sector gears 3 arranged outside the silo 9 in sequence along the axis of the silo 9, and the two sector gears 3 are both rotatably connected to the stirring shaft 8 extending from the side of the silo 9. The orientations of the teeth on the two sector gears 3 correspond to the two door leaves 1, respectively. The two sector gears 3 are fixedly connected to the corresponding door leaves 1, respectively. The two sector gears 3 are both rotatably connected to the silo 9, and a sliding frame 4 with a door-shaped cross section is provided outside the two sector gears 3, and the sliding frame 4 is buckled outside the two sector gears 3. Racks 2 are fixedly provided on both sides of the sliding frame 4, and the two racks 2 are parallel to each other and mesh with the corresponding sector gears 3, respectively. The silo 9 is provided with a vertical hydraulic cylinder 5 for driving the racks 2 to move linearly.

[0054] A pair of parallel slide rails 11 are provided between the slide frame 4 and the silo 9, the slide rails 11 are parallel to the rack 2, the hydraulic cylinder 5 is parallel to the slide rails 11, the track of the slide rails 11 is fixedly connected to the silo 9, the sliders of the slide rails 11 are fixedly connected to the slide frame 4, and the two ends of the hydraulic cylinder 5 are hinged to the slide frame 4 and the silo 9 respectively.

[0055] When the hydraulic cylinder 5 is in motion, it drives the slide frame 2 to move radially along the silo 9. Driven by the rack 2, the two sector gears 3 rotate in opposite directions, thereby driving the two door leaves 1 to open in a split manner. The hydraulic cylinder 5 can also be replaced by other linear actuators, such as an electric push rod.

[0056] Since the two door leaves 1 rotate along the axis of the silo 9 when opening and closing, the distance between the outer wall of the silo 9 and the door leaf 1 remains unchanged during the process of opening and closing the door leaf 1, so it is difficult for aggregates in the concrete to enter the gap between the door leaf 1 and the silo 9, thereby preventing the door leaf 1 from being stuck by aggregates in the concrete during the opening and closing process.

[0057] The above-mentioned embodiments are described in a relatively detailed and specific manner, expressing the preferred embodiments of the present invention, and are only used to illustrate the technical ideas and features of the present invention. The purpose is to enable technicians in this field to understand the contents of the present invention and implement them accordingly, but are not limited to the present invention. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in this field, without departing from the structure of the present invention, local improvements within the system and changes and conversions between subsystems, etc., are still within the patent scope of the present invention.

Claims

1. A hanging double-door hopper, characterized in that: The invention comprises a hanger (6) and a silo (9) rotatably connected to the hanger (6), wherein the silo (9) is in a closed cylindrical shape, the rotation axis of the silo (9) is in a horizontal direction, an inlet and outlet port (10) is provided at the bottom of the silo (9), and a pair of double-opening door leaves (1) are covered on the inlet and outlet port (10), the bottom of the door leaves (1) are in an arc shape corresponding to the silo (9), the two sides of the door leaves (1) are respectively rotatably connected to the two sides of the silo (9), the rotation axis of the door leaves (1) is coaxial with the axis of the silo (9), the silo (9) is provided with a door opening and closing mechanism for driving the two door leaves (1) to open or close, and the hanger (6) is provided with a driving mechanism for driving the silo (9) to rotate.

2. A hanging double-door hopper according to claim 1, characterized in that: The driving mechanism comprises a box body (14), a box cover (18) and a reduction motor (19) which are fixedly connected to the outside of the hanger (6) in sequence; a first gear ring (7) coaxial with the silo (9) is fixedly arranged in the box cover (18); a driving shaft (20) coaxial with the first gear ring (7) is arranged in the box body (14); the driving shaft (20) is rotatably connected to the box cover (18); the driving shaft (20) is transmission-connected to the reduction motor (19); a driving gear (22) is transmission-connected to the driving shaft (20); a planetary gear (23) is arranged between the driving gear (22) and the first gear ring (7); the driving gear (22) and the first gear ring (7) are both meshed with the planetary gear (23); an outer rotating sleeve (15) is rotatably connected to the box body (14); the planetary gear (23) is rotatably connected to one end of the outer rotating sleeve (15); the other end of the outer rotating sleeve (15) is fixedly connected to the silo (9).

3. A hanging double-door hopper according to claim 2, characterized in that: The silo (9) is rotatably connected with an agitator, the agitator shaft (8) of the agitator is coaxial with the silo (9), the outer rotating sleeve (15) is rotatably connected with an inner rotating sleeve (16), the inner rotating sleeve (16) is coaxial with the driving gear (22), one end of the inner rotating sleeve (16) is transmission-connected with the agitator shaft (8), the other end of the inner rotating sleeve (16) is fixedly connected with a second gear ring (17), the driving gear (22) is movably connected with the driving shaft (20), the driving shaft (20) is provided with a displacement structure for driving the driving gear (22) to move axially, driven by the displacement structure, the driving gear (22) has two working positions on the driving shaft (20); when the driving gear (22) reaches one of the working positions, the driving gear (22) meshes with the planetary gear (23), and when the driving gear (22) reaches the other working position, the driving gear (22) meshes with the second gear ring (17).

4. A hanging double-door hopper according to claim 3, characterized in that: The displacement structure is a spline arranged on the outer circle of the driving shaft (20), the spline is spiral, and the driving shaft (20) is transmission-connected to the driving gear (22) via the spline.

5. The hanging double-door hopper according to claim 1, characterized in that: The door opening and closing mechanism comprises two sector gears (3) arranged in sequence outside the silo (9) along the axis of the silo (9), the directions of the teeth on the two sector gears (3) respectively correspond to the two door leaves (1), the two sector gears (3) are respectively fixedly connected to the corresponding door leaves (1), the two sector gears (3) are both rotatably connected to the silo (9), a sliding frame (4) is arranged outside the two sector gears (3), two parallel racks (2) are fixedly arranged inside the sliding frame (4), the two racks (2) are respectively meshed with the corresponding sector gears (3), and a hydraulic cylinder (5) for driving the racks (2) to move linearly is arranged on the silo (9).

6. A hanging double-door hopper according to claim 5, characterized in that: A pair of mutually parallel slide rails (11) are provided between the slide frame (4) and the material bin (9); the slide rails (11) are parallel to the rack (2); the hydraulic cylinder (5) is parallel to the slide rails (11); the track of the slide rails (11) is fixedly connected to the material bin (9); the slider of the slide rails (11) is fixedly connected to the slide frame (4); and the two ends of the hydraulic cylinder (5) are respectively hinged to the slide frame (4) and the material bin (9).

7. The hanging double-door hopper according to claim 2, characterized in that: An electromagnetic brake (13) for locking the position of the outer rotating sleeve (15) is provided on the hanger (6).

8. The hanging double-door hopper according to claim 3, characterized in that: A rotating ring (21) is provided on both sides of the driving gear (22), the rotating ring (21) is coaxial with the driving gear (22), and the inner rotating sleeve (16) and the box cover (18) are respectively rotatably connected to the corresponding rotating ring (21).

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