A feeding funnel

Abstract

This utility model belongs to the technical field of ore processing equipment and discloses a feeding funnel, including: a frame and a funnel and a crushing assembly mounted on the frame. The crushing assembly includes a crushing chamber located above the funnel; a crushing shaft located within the crushing chamber, with one end rotatably connected to the bottom of the crushing chamber and the free end passing through the top of the crushing chamber; a crushing cutter head located within the crushing chamber and fixedly mounted on the outer wall of the crushing shaft; and a drive motor located on the frame, with its output end fixedly connected to the free end of the crushing shaft. In this design, lime to be fed into the funnel is pre-picked into the crushing chamber, and then the drive motor drives the crushing shaft to rotate. The crushing cutter head rotates and cuts within the crushing chamber, breaking the agglomerated lime into powder before it is fed into the funnel. This utility model solves the problem of crushing agglomerated lime.

Description

Technical Field

[0001] The solution belongs to the technical field of ore processing equipment, specifically involving a feeding funnel. Background Technology

[0002] To increase its ore processing capacity, the Ashele Mine modified its ball mill feeding method, as the original feeding method was insufficient. Specifically, the original ball mill feed pipe was removed, and a funnel was installed at the feed end of the feed pipe. The ore is now fed to the funnel via a belt conveyor. The discharge end of the hydrocyclone's settling pipe is connected to the funnel, allowing the hydrocyclone's slurry to be fed into the funnel and mixed with the ore.

[0003] By mixing the hydrocyclone slurry with the raw ore in a funnel before feeding it into a ball mill, the moisture in the slurry pre-wets the raw ore particles, effectively reducing their surface friction and preventing particle agglomeration caused by "dry grinding." The fine-grained slurry acts as a natural grinding medium, forming a "fine-to-coarse" grinding process, which enhances the shearing and grinding effects between particles and increases the raw ore processing capacity of the Ashele mine.

[0004] See the existing publication (announcement) number CN216499985U, which discloses a material leveling device for a heavy medium cyclone funnel. The device includes a funnel body, with crushing rollers installed on both sides inside the funnel body. Guide plates are installed on the inner wall of the funnel body on both sides of the upper end of the crushing rollers. A material leveling chamber is integrally connected to the lower end of the funnel body. A material leveling mechanism is installed at the center of the material leveling chamber. The material leveling mechanism includes a material leveling platform. Tension springs are connected to both sides of the material leveling platform. The two sides of the material leveling platform are fixedly installed on the inner side of the material leveling chamber by the tension springs. A hinge is installed on the upper left side of the funnel body. A sealing cover is installed on the funnel body by the hinge. One end of the crushing roller penetrates the inner wall of the funnel body and is connected to a drive motor outside the funnel body.

[0005] For example, the aforementioned funnel uses a material equalization mechanism to homogenize the material. However, in the Ashele mine, after mixing the hydrocyclone slurry and raw ore in the funnel and feeding it into the ball mill, it is necessary to pre-adjust the pH of the slurry by adding lime and sulfuric acid in the funnel. This reduces the impact of ore slime agglomeration on grinding efficiency, improves the "fine-to-coarse" grinding of fine-grained slurry, and enhances the grinding quality of the raw ore by the ball mill. However, when lime is added to the funnel, it is prone to moisture absorption and clumping due to the diurnal temperature variation. Clumped lime leads to poor mixing with the slurry, so it needs to be crushed into powder in the funnel. Utility Model Content

[0006] The purpose of this solution is to provide a feeding funnel to solve the problem of crushing lime.

[0007] To achieve the above objectives, this solution provides a feeding funnel, including a frame and a funnel and a crushing assembly mounted on the frame, wherein the crushing assembly includes:

[0008] A grinding chamber is located above the funnel;

[0009] A crushing shaft is disposed in a crushing chamber, one end of which is rotatably connected to the bottom of the crushing chamber, and the free end passes through the top of the crushing chamber;

[0010] A pulverizing head is disposed in the pulverizing chamber and fixedly disposed on the outer wall of the pulverizing shaft;

[0011] A drive motor is mounted on the frame, and the output end of the drive motor is fixedly connected to the free end of the crushing shaft.

[0012] The principle and effect of this scheme are as follows: Lime is pre-poured into the crushing chamber, and then a drive motor rotates the crushing shaft, causing the crushing cutters to cut and break up the clumps of lime into powder through the impact and shearing action of the cutters. Finally, the crushed lime powder is added to the hopper to fully mix with the slurry. By adjusting the pH of the slurry with lime, the impact of ore slime agglomeration on grinding is reduced, thereby improving the grinding quality of the raw ore by the ball mill.

[0013] Furthermore, the bottom of the crushing chamber is provided with a discharge port, and the bottom of the crushing chamber is provided with a partition plate, the partition plate having a through hole that matches the discharge port; one end of the crushing shaft passes through the bottom of the crushing chamber, the crushing shaft is connected to a spring, and the free end of the spring is fixedly connected to the partition plate.

[0014] The principle and effect of this scheme are as follows: In the non-crushing stage, i.e., the feeding stage, the through-hole and the discharge port are staggered, and the baffle blocks the discharge port, preventing material from being discharged from the discharge port when lime is added to the crushing chamber. In the crushing stage, because the crushing shaft needs to rotate at a high speed to crush the material, the high-speed rotation of the crushing shaft generates a large centrifugal force, which drives the spring to overcome the preload and shift outward, keeping the baffle and the discharge port staggered and preventing incompletely crushed material from being discharged prematurely. When the lime is completely crushed, the crushing shaft no longer needs to rotate at a high speed. By reducing the speed of the crushing shaft, the centrifugal force is reduced, and the spring experiences a smaller centrifugal force. The preload drives the baffle to move until the through-hole and the discharge port coincide. At this time, the powdered lime in the crushing chamber falls into the funnel through the through-hole and the discharge port, and is then mixed with the slurry to adjust the pH value. This scheme does not require an additional control structure; it only relies on the change in the crushing shaft speed and the spring force to achieve automatic switching between the crushing and feeding processes.

[0015] Furthermore, the funnel is connected to a hydrocyclone via a slurry inlet pipe, and the discharge end of the hydrocyclone's sedimentation pipe is connected to the slurry inlet pipe; the top of the funnel is equipped with a belt conveyor for transporting raw ore; the bottom of the funnel is connected to an auger conveyor via a pipe, and the discharge end of the auger conveyor is connected to the feed end of the ball mill.

[0016] The principle and effect of this scheme are as follows: Based on the need to improve the raw ore processing efficiency of the Ashele mine, the hydrocyclone transports the slurry to the funnel through the slurry inlet pipe. The slurry pre-wets the raw ore particles delivered by the belt conveyor, reducing their surface friction. Simultaneously, the fine-grained slurry acts as a grinding medium, filling the gaps in the raw ore and creating a "fine-to-coarse" grinding effect. In the crushing chamber, lime is crushed into powder and falls into the funnel, where it is thoroughly mixed with the slurry and raw ore, and the pH value of the slurry is adjusted. The uniformly mixed material enters the screw conveyor through the bottom pipe of the funnel, sending it to the feed end of the ball mill, thereby increasing the ball mill's processing capacity and grinding quality.

[0017] Furthermore, one end of the pulverizing shaft extends into the funnel and is coaxially and fixedly connected to a stirring rod, which has a spiral structure.

[0018] The principle and effect of this scheme are as follows: the crushing shaft can also drive the stirring rod to rotate. Through the stirring action of the stirring rod, the lime powder is mixed with the slurry, so that the lime is evenly dispersed in the slurry and the pH value of the slurry is adjusted.

[0019] Furthermore, the bottom of the crushing chamber is provided with a discharge cylinder, one end of which is connected to the bottom of the crushing chamber, and the free end is located in the funnel. The crushing shaft passes through the free end of the discharge cylinder; the free end of the discharge cylinder is provided with a discharge port.

[0020] The principle and effect of this scheme are as follows: after the lime is crushed into powder, the material enters the unloading cylinder under the action of gravity, and the unloading cylinder guides it into the inside of the funnel, so as to prevent the powder from being thrown up outside the funnel during the conveying process.

[0021] Furthermore, the unloading cylinder is provided with a baffle, the baffle has a through groove that matches the unloading port, the baffle is connected with a compression spring, and the free end of the compression spring is fixedly connected to the crushing shaft.

[0022] The principle and effect of this scheme are as follows: When the crushing shaft rotates at high speed to crush lime, the large centrifugal force causes the baffle to expand outward against the spring force, and the through channel and discharge port are misaligned, closing the discharge channel and preventing incompletely crushed lime lumps from falling into the funnel. After the lime crushing is completed and the speed is reduced, the lime in the crushing chamber falls into the discharge cylinder for temporary storage. Only when the hydrocyclone feeds slurry into the funnel, and the crushing shaft is controlled to rotate at a lower speed, does the through channel and discharge port coincide, opening the discharge channel, and the material in the discharge cylinder falls into the funnel through the discharge port, thereby mixing with the slurry and adjusting the pH value of the slurry.

[0023] Furthermore, the unloading cylinder includes a first unloading cylinder and a second unloading cylinder. The second unloading cylinder is slidably disposed inside the first unloading cylinder and is connected to the first unloading cylinder. The free end of the second unloading cylinder is disposed inside the funnel. The unloading port and the baffle are both disposed at the free end of the second unloading cylinder.

[0024] The principle and effect of this scheme are as follows: the discharge cylinder is set as a first discharge cylinder and a second discharge cylinder, so that the second discharge cylinder can extend and retract within the first discharge cylinder to form a nested structure of discharge cylinders. This allows the second discharge cylinder to float on the slurry. As the volume of slurry in the funnel gradually increases and the liquid level rises, the second discharge cylinder retracts into the first discharge cylinder along with the liquid level. This allows the second discharge cylinder to gradually discharge lime along with the liquid level, so that the amount of material falling is equal to the amount of slurry in the funnel. This ensures that the lime is fed above the slurry, preventing it from being uniformly fed to the bottom of the funnel or accumulating on the top of the slurry. This results in more uniform material discharge, and the dispersion and mixing are better under the stirring of the stirring rod.

[0025] Furthermore, a float plate is provided below the free end of the second unloading cylinder, the float plate is rotatably connected to the second unloading cylinder, and the float plate is coaxially connected to the crushing shaft.

[0026] The principle and effect of this scheme are as follows: Because the discharge port is located at the free end of the second discharge cylinder, the slurry can easily enter the second discharge cylinder through the discharge port, thus wetting the material and causing blockage of the discharge port. Therefore, this scheme sets up a float plate below the second discharge cylinder. The float plate can float on the slurry and, as the slurry level rises, it drives the second discharge pipe upward, so that the discharge port does not directly contact the slurry. At the same time, the float plate is coaxially connected to the crushing shaft, which drives the float plate to rotate, thereby dispersing the falling material and preventing it from piling up, allowing it to mix with the slurry and making the pH value adjustment more accurate.

[0027] Furthermore, the spring constant of the compression spring is less than that of the spring.

[0028] The principle and effect of this solution are as follows: With the above settings, when the crushing shaft rotates at a high speed, the discharge port is sealed during the crushing of materials and when the material is discharged from the crushing chamber. When the crushing shaft rotates at a lower speed (less than the crushing shaft's rotational speed during material discharge), the discharge port is open.

[0029] Furthermore, the shredder head has a spiral blade structure, with the windward side of the blade being a concave arc surface and the leeward side being a convex arc surface, and the radius of curvature of the concave arc surface gradually decreasing from the root to the tip; when the shredder head rotates clockwise, the airflow passes through the blade to generate a downward airflow.

[0030] The principle and effect of this scheme are as follows: After all the material in the discharge cylinder is discharged into the slurry, and the pH of the slurry is adjusted to a suitable value range, the belt conveyor will then feed the raw ore into the funnel in sequence. Then, the crushing shaft is controlled to rotate at the maximum speed, and both the discharge port and the unloading port are in an unobstructed state. The downward airflow generated by the crushing blades blows the airflow into the funnel, causing bubbles to form on the surface of the slurry. Under the action of the stirring rod, the bubbles will burst, thereby improving the mixing effect of the slurry with the ore and lime. Finally, the discharge end of the funnel is opened, and the screed conveyor sends it into the ball mill for secondary spheroidizing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a feeding funnel according to the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the funnel of this utility model;

[0033] Figure 3 This is a schematic diagram of the internal structure of the crushing component of this utility model;

[0034] Figure 4 for Figure 3 Enlarged view of part A in the middle Figure 1 ;

[0035] Figure 5 for Figure 3 Enlarged view of part A in the middle Figure 2 ;

[0036] Figure 6 for Figure 3 Enlarged view of part A in the middle Figure 3 ;

[0037] Figure 7 for Figure 3 Enlarged view of part A in the middle Figure 4 ;

[0038] Figure 8 for Figure 3 Enlarged view of part B in the middle Figure 1 ;

[0039] Figure 9 for Figure 3 Enlarged view of part B in the middle Figure 2 .

[0040] The corresponding labels in the attached diagram are named as follows: frame 1, funnel 2, slurry inlet pipe 21, crushing assembly 3, crushing chamber 31, discharge port 311, crushing shaft 32, crushing cutter head 33, drive motor 34, partition plate 35, through hole 351, spring 352, unloading cylinder 36, unloading port 361, first unloading cylinder 362, second unloading cylinder 363, baffle plate 37, through groove 371, compression spring 372, float plate 38, belt conveyor 4, auger conveyor 5, stirring rod 6. Detailed Implementation

[0041] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model.

[0042] Example:

[0043] Please see Figure 1 The feeding hopper provided in this embodiment includes a frame 1, on which two hoppers 2 are horizontally and symmetrically installed. The hoppers 2 are top-opening hoppers 2. A belt conveyor 4 is provided on one side of the top of the hopper 2 to transport the raw ore (particle size ≤30mm) into the hopper 2. The hopper 2 is connected to the slurry inlet pipe 21 through a DN150 flange. The other end of the slurry inlet pipe 21 is connected to the sedimentation pipe of the hydrocyclone (not shown). The slurry enters the hopper 2 at a flow rate of 50m³ / h under the pressure of 0.2MPa in the hydrocyclone. The bottom of the hopper 2 is connected to the screw conveyor 5 through a flange. The screw conveyor 5 can transport the mixed material to the feed port of the ball mill (not shown).

[0044] Please see Figures 1-3 A crushing assembly 3 is positioned directly above the funnel 2 and is fixedly mounted on the frame 1. The crushing assembly 3 includes a crushing chamber 31, a crushing shaft 32, crushing blades 33, and a drive motor 34. The crushing chamber 31 is conical and positioned directly above the funnel 2, with a discharge port 311 at its bottom. The crushing shaft 32 is located inside the crushing chamber 31, with one end rotatably connected to the bottom of the crushing chamber 31 and the free end passing through the top of the crushing chamber 31. A sealed bearing seat is provided at the passing position, and a reducer is connected to the free end. The input end of the reducer is connected to the output end of the drive motor 34. The drive motor 34 is a variable frequency motor and is electrically connected to a variable frequency controller to adjust the rotational speed of the crushing shaft 32. The crushing blades 33 are located inside the crushing chamber 31, and there are two sets of crushing blades 33, both of which are coaxially and fixedly connected to the crushing shaft 32.

[0045] Please see Figure 3The bottom of the crushing chamber 31 is equipped with a partition 35, which is a circular steel plate. A through hole 351 of a certain diameter is opened in the center of the plate surface. The distance between the center of the through hole 351 and the center of the discharge port 311 is 50mm, forming an eccentric misaligned structure (such as...). Figure 4 (As shown). The partition 35 is connected to the crushing shaft 32 via a spring 352. The spring 352 is a compression spring (elastic coefficient k=80N / mm). One end of the spring 352 is fixed to the crushing shaft 32, and the other end is bolted to the ear plate on the back of the partition 35. When the crushing shaft 32 rotates at high speed (speed ≥1200r / min), the centrifugal force causes the crushing shaft 32 to stretch the spring 352, and the partition 35 rotates around the bearing center. The through hole 351 is completely misaligned with the discharge port 311 (as shown). Figure 5 As shown), it prevents uncrushed lime from falling; when the rotation speed decreases to ≤500r / min, the centrifugal force decreases, the spring 352 resets and pushes the baffle 35 to rotate, and the through hole 351 coincides with the discharge port 311 (as shown). Figure 6 As shown in the figure, lime powder falls into hopper 2 through discharge port 311 under the action of gravity. This structure utilizes the dynamic balance between centrifugal force and spring force to achieve automatic switching between crushing and feeding, without the need for additional electrical control components.

[0046] Please see Figure 2 and Figure 3 The lower end of the crushing shaft 32 extends into the funnel 2 and is fixedly connected to the stirring rod 6 by a flat key. The stirring rod 6 has a spiral structure. When the crushing shaft 32 rotates, the stirring rod 6 rotates synchronously, generating a radial stirring force, which causes the lime powder (addition amount 8kg / t ore), raw ore and slurry to form a vortex mixing in the funnel 2.

[0047] Please continue reading. Figure 3 The bottom of the crushing chamber 31 is connected to the discharge cylinder 36 via a flange. The discharge cylinder 36 has a two-section nested structure, including a fixed first discharge cylinder 362 and a second discharge cylinder 363 that can slide up and down. The two are sealed by O-rings. The second discharge cylinder 363 can slide up and down within the first discharge cylinder 362. A discharge port 361 is opened at the lower end of the second discharge cylinder 363. A baffle 37 is provided above the discharge port 361. The baffle 37 has a through groove 371 that matches the discharge port 361. It is connected to the crushing shaft 32 via a compression spring 372 (elastic coefficient k=50N / mm). The elastic coefficient of the compression spring 372 is less than that of the spring 352, ensuring that when the speed of the crushing shaft 32 decreases, the discharge port 361 of the discharge cylinder 36 opens later than the through hole 351 of the partition 35, so that the material can be temporarily stored in the first discharge cylinder 362 and the second discharge cylinder 363 (e.g., Figure 8 (As shown). When the crushing shaft 32 rotates at a speed ≥ 1000 r / min, the compression spring 372 is stretched, and the through groove 371 of the baffle 37 aligns with the discharge port 361 (as shown). Figure 9 As shown), lime powder falls evenly into funnel 2 through discharge port 361.

[0048] Please see Figure 3 A float plate 38, made of polypropylene, is rotatably connected to the lower end of the second discharge cylinder 363. The float plate 38 has a cross-shaped groove in its bearing, and a cross-shaped protrusion on the crushing shaft 32 that mates with the groove. This interaction allows the float plate to rotate on the crushing shaft 32 and move up and down with the slurry. When the slurry level in the funnel 2 rises, the float plate 38 floats with the rise, causing the second discharge cylinder 363 to move upwards synchronously within the first discharge cylinder 362. This ensures that the discharge port 361 remains 30-50 mm above the slurry surface, preventing backflow of slurry into the discharge cylinder 36. Simultaneously, the crushing shaft 32 rotates the float plate 38, evenly spreading the falling lime powder on the slurry surface. Combined with the agitation of the stirring rod 6, this ensures the pH adjuster is evenly dispersed.

[0049] The crushing cutter head 33 has a spiral blade structure, made of wear-resistant steel. The blades are distributed along the Archimedean spiral along the axial direction of the crushing shaft 32, with the spiral angle gradually changing from 25° at the root to 55° at the tip. The windward side of the blade is a concave arc surface (radius of curvature gradually changing from 60mm at the root to 25mm at the tip), and the leeward side is a convex arc surface (radius of curvature 40mm). When the crushing shaft 32 rotates clockwise at high speed, the blades push the air to form a downward airflow. The airflow enters through the top opening of the crushing chamber 31 and is blown onto the surface of the slurry through the discharge port 311 and the unloading port 361, causing bubbles to form on the surface of the slurry. The bubbles burst under the action of the stirring rod 6, generating local turbulence, which further enhances the shearing and mixing effect of lime, slurry and raw ore.

[0050] Specific workflow:

[0051] (1) The drive motor 34 starts, the crushing shaft 32 accelerates to 1300r / min, the lumpy lime (particle size ≤40mm) is put into the top feed port of the crushing chamber 31 and the feed port is closed. The crushing head 33 crushes it to -3mm through impact and shearing action for 3-5 minutes. At this time, the through hole 351 of the partition plate 35 is staggered from the discharge port 311, and the discharge port 361 of the discharge cylinder 36 is closed.

[0052] (2) After crushing, the drive motor 34 slows down to 450 r / min, the spring 352 resets so that the through hole 351 coincides with the discharge port 311, and the lime powder falls into the discharge cylinder 36. At the same time, the belt conveyor 4 transports the raw ore at a rate of 12 t / h, and the hydrocyclone slurry enters the funnel 2 at a flow rate of 45 m³ / h. When the slurry level is detected to reach a height of 400 mm, the crushing shaft 32 slows down to 300 r / min, the compression spring 372 resets, the discharge port 361 opens, the lime powder falls into the slurry, and the stirring rod 6 rotates synchronously to form a solid-liquid-gas three-phase mixed flow.

[0053] (3) After the materials are mixed, the drive motor 34 is accelerated to 1450r / min and runs for 1 minute. The downward airflow generated by the crushing head 33 is used to further stir the mixture. Then the screw conveyor 5 is started to transport the mixed materials to the ball mill for grinding. The whole process is automated and the cycle is 8-10 minutes.

[0054] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A feed hopper comprising a frame (1) and a hopper (2) and a comminution assembly (3) arranged on the frame (1), characterized in that The crushing component (3) includes: A pulverizing chamber (31) is located above the funnel (2); A crushing shaft (32) is disposed in a crushing chamber (31). One end of the crushing shaft (32) is rotatably connected to the bottom of the crushing chamber (31), and the free end passes through the top of the crushing chamber (31). The crushing head (33) is located in the crushing chamber (31) and is fixedly mounted on the outer wall of the crushing shaft (32); A drive motor (34) is mounted on the frame (1), and the output end of the drive motor (34) is fixedly connected to the free end of the crushing shaft (32).

2. A feed hopper according to claim 1, characterised in that: The bottom of the crushing chamber (31) is provided with a discharge port (311), and the bottom of the crushing chamber (31) is provided with a partition (35). The partition (35) is provided with a through hole (351) that matches the discharge port (311). One end of the crushing shaft (32) passes through the bottom of the crushing chamber (31), and the crushing shaft (32) is connected to a spring (352). The free end of the spring (352) is fixedly connected to the partition (35).

3. A feed hopper according to claim 1, wherein: The funnel (2) is connected to a hydrocyclone through a slurry inlet pipe (21), and the discharge end of the sedimentation pipe of the hydrocyclone is connected to the slurry inlet pipe (21); the top of the funnel (2) is equipped with a belt conveyor (4) for conveying raw ore; the bottom of the funnel (2) is connected to an auger conveyor (5) through a pipe, and the discharge end of the auger conveyor (5) is connected to the feed end of the ball mill.

4. A feed hopper according to claim 2, wherein: One end of the crushing shaft (32) extends into the funnel (2) and is coaxially fixedly connected to a stirring rod (6), which has a spiral structure.

5. A feed hopper according to claim 4, wherein: The bottom of the crushing chamber (31) is provided with a discharge cylinder (36), one end of which is connected to the bottom of the crushing chamber (31), and the free end is located in the funnel (2). The crushing shaft (32) passes through the free end of the discharge cylinder (36); the free end of the discharge cylinder (36) is provided with a discharge port (361).

6. A feed hopper according to claim 5, wherein: The discharge cylinder (36) is provided with a baffle (37), the baffle (37) has a through groove (371) that matches the discharge port (361), the baffle (37) is connected with a compression spring (372), and the free end of the compression spring (372) is fixedly connected to the crushing shaft (32).

7. A feed hopper according to claim 6, wherein: The discharge cylinder (36) includes a first discharge cylinder (362) and a second discharge cylinder (363). The second discharge cylinder (363) is slidably disposed inside the first discharge cylinder (362) and is connected to the first discharge cylinder (362). The free end of the second discharge cylinder (363) is disposed inside the funnel (2). The discharge port (361) and the baffle (37) are both disposed at the free end of the second discharge cylinder (363).

8. A feed hopper according to claim 7, wherein: A float plate (38) is provided below the free end of the second discharge cylinder (363). The float plate (38) is rotatably connected to the second discharge cylinder (363), and the float plate (38) is coaxially connected to the crushing shaft (32).

9. A feed hopper according to claim 7, wherein: The elastic coefficient of the compression spring (372) is less than that of the spring (352).

10. A feed hopper according to claim 5, wherein: The crushing head (33) has a spiral blade structure. The windward side of the blade is a concave arc surface, and the leeward side is a convex arc surface. The radius of curvature of the concave arc surface gradually decreases from the root to the tip. When the crushing head (33) rotates clockwise, the airflow generates a downward airflow through the blade.

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