Straw pulping raw material crushing and grading device

Abstract

The utility model belongs to the technical field of biomass material processing equipment, the utility model discloses a raw material crushing and grading device for straw pulping, including frame, still including fixedly arranged on the frame's crushing box, fixedly arranged on the crushing box's feeding hopper and fixedly arranged on the crushing box's lower side's classified discharge box, the side wall of crushing box is provided with transmission shaft rotation, the transmission shaft circumferential side wall is fixed with the boss, the transmission shaft outer wall horizontal sliding sleeve is equipped with the rotating cylinder, the rotating cylinder inner wall is fixedly arranged with the sliding slot, and the sliding slot provides the sliding direction for the rotating cylinder, and the movement track of limiting part is limited, ensures that the component moves along the fixed direction in the operation or the adjusting process, the sliding slot corresponds with the boss, one side end face of the rotating cylinder is fixed with the convex column, the convex column top is equipped with the ball, the inner wall of crushing box is fixedly installed with the swash plate, and the swash plate guides the ball rolling with the inclined surface of itself.

Description

Technical Field

[0001] This utility model belongs to the technical field of biomass material processing equipment, and in particular relates to a raw material crushing and grading device for straw pulping. Background Technology

[0002] In the straw pulping process, the raw material pretreatment stage requires crushing and coarse-fine grading of straw to ensure uniform particle size of fiber raw materials in subsequent pulping processes, and to avoid coarse particles affecting pulp quality or clogging equipment. Currently, the industry mostly uses separate crushing and grading equipment to complete this process, that is, the straw is first crushed by a crusher and then transferred to a grading device for screening. This process requires additional investment in transfer devices and manual monitoring, resulting in low production efficiency and large equipment footprint. Therefore, there is an urgent need for an integrated crushing and grading device to achieve integrated operation of "crushing and grading".

[0003] The following issues need to be addressed in the existing technology:

[0004] (1) The hammers of existing crushing equipment rotate on a fixed trajectory, which can only impact and crush straw in a local area of ​​the crushing box. This easily leads to uneven crushing of straw, and some coarse material enters the subsequent process before meeting the particle size requirements, increasing the burden of grading.

[0005] (2) The screen drive of existing grading equipment mostly relies on independent motors, which not only increases energy consumption, but also the vibration frequency does not match the crushing rhythm (such as fast crushing and slow grading leading to material accumulation, or fast grading and slow crushing leading to screen idling). Long-term high-frequency vibration of the screen is prone to deformation. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a raw material crushing and grading device for straw pulping, which reduces equipment investment and energy consumption and improves overall production efficiency.

[0007] The technical solution adopted by this utility model is as follows: A raw material crushing and grading device for straw pulping includes a frame, a crushing box fixedly mounted on the frame, a feeding hopper fixedly mounted on the crushing box, and a sorting discharge box fixedly mounted on the lower side of the crushing box. A drive shaft is rotatably mounted on the side wall of the crushing box, and a boss is fixedly mounted on the circumferential side wall of the drive shaft. A rotating cylinder is horizontally slidably mounted on the outer wall of the drive shaft. A sliding groove is fixedly mounted on the inner wall of the rotating cylinder, providing sliding guidance for the rotating cylinder, limiting the movement trajectory of the components, and ensuring that the components move along a fixed direction during operation or adjustment. The sliding groove corresponds to the boss. A protruding post is fixedly mounted on one end face of the rotating cylinder, and a ball bearing is provided on the top of the protruding post. An inclined plate is fixedly mounted on the inner wall of the crushing box, utilizing its own inclined surface. The ball bearings are guided to roll, thereby driving the rotating cylinder to achieve stable reciprocating movement and ensuring the regularity of the hammer's left and right movement trajectory. The ball bearings correspond to the inclined surface of the swashplate. The sorting discharge box is fixedly and inclinedly equipped with a screen, which is a key component for material particle size screening. The size of the screen mesh controls the particle size of fine materials. Only materials with a particle size smaller than the mesh mesh can pass through the screen and enter the fine material discharge port, while coarse materials are intercepted and guided to the coarse material discharge port, achieving precise separation of coarse and fine materials. An eccentric wheel is fixedly sleeved on the outer circumference of the drive shaft. When the eccentric wheel rotates with the shaft, it generates eccentric motion, converting the rotational force into a reciprocating driving force. This force drives the subsequent connecting rod assembly, providing power for the vibration of the screen or the movement of related components. It is an important component for power conversion in the equipment. The eccentric wheel has grooves on its side wall.

[0008] As a preferred technical solution of this invention, a second connecting rod is slidably provided in the groove, a first connecting rod is fixedly provided on the inner wall of the crushing box, and the second connecting rod is slidably provided on the first connecting rod vertically.

[0009] As a preferred technical solution of this invention, a motor is fixedly installed on one side of the outer wall of the crushing box, and the motor is coaxially and fixedly connected to one end of the transmission shaft. Hammer blades are fixedly arranged in a ring array on the outer wall of the rotating cylinder.

[0010] As a preferred technical solution of this invention, the bottom of the sorting and discharging box is fixedly provided with a fine material discharge port, and the side wall of the sorting and discharging box is provided with a coarse material discharge port. The coarse material discharge port is located on the lower side of the screen, and the fine material discharge port is located directly below the screen.

[0011] As a preferred technical solution of this invention, the swashplate is made of magnets and the rotating cylinder is made of magnetic material.

[0012] The beneficial effects of this utility model after adopting the above structure are as follows:

[0013] (1) By utilizing the magnetic attraction between the swash plate and the rotating cylinder, the ball bearings roll along the surface of the swash plate as the rotating cylinder rotates. Then, the rotating cylinder is driven to slide back and forth along the boss through the convex column, so that the hammer blades can move left and right in the crushing box. This structure allows the hammer blades to have both rotational and reciprocating motion trajectories. This composite motion can ensure that the straw is crushed evenly, reduce coarse material residue, and reduce the processing pressure of subsequent grading processes.

[0014] (2) The eccentric wheel is driven to rotate synchronously by the rotating cylinder. The eccentric wheel groove and the connecting rod slide together to convert the rotational motion into the up-and-down reciprocating motion of the connecting rod, which causes the screen to vibrate. This vibration can break the adhesion between raw material particles. At the same time, with the help of the inclined structure of the screen, the coarse material is automatically discharged along the inclined direction, avoiding screen blockage and coarse material accumulation, improving grading efficiency, reducing the number of shutdowns for cleaning, and ensuring production continuity.

[0015] (3) The crushing box and the sorting discharge box are integrated into the same frame. The crushing system (rotating drum, hammer) and the grading system (eccentric wheel, screen) are driven synchronously by a single motor. No additional transfer device or independent drive component is required, which simplifies the raw material pretreatment process of straw pulping, reduces equipment investment and energy consumption, and improves overall production efficiency. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the overall structure of a straw pulping raw material crushing and grading device proposed in this utility model;

[0018] Figure 2 This is a cross-sectional view of the internal structure of a straw pulping raw material crushing and grading device proposed in this utility model;

[0019] Figure 3 This is a cross-sectional view of the eccentric wheel structure proposed in this utility model;

[0020] Figure 4 This is a cross-sectional view of the connection structure of a straw pulping raw material crushing and grading device proposed in this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of the local structure of part A in the middle.

[0022] In the attached diagram: 1. Feed hopper; 2. Crushing box; 3. Classification discharge box; 4. Frame; 5. Fine material discharge port; 6. Coarse material discharge port; 7. Drive shaft; 8. Slide groove; 9. Boss; 10. Hammer blade; 11. Screen; 12. Eccentric wheel; 13. Groove; 14. Rotating cylinder; 15. Motor; 16. Connecting rod one; 17. Connecting rod two; 18. Swashplate; 19. Ball bearing; 20. Protruding column. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-5 As shown, a straw pulping raw material crushing and grading device includes a frame 4, a crushing box 2 fixedly mounted on the frame 4, a feed hopper 1 fixedly mounted on the crushing box 2, and a sorting discharge box 3 fixedly mounted on the lower side of the crushing box 2. A drive shaft 7 is rotatably mounted on the side wall of the crushing box 2. A boss 9 is fixedly mounted on the circumferential side wall of the drive shaft 7. A rotating cylinder 14 is horizontally slidably mounted on the outer wall of the drive shaft 7. A sliding groove 8 is fixedly mounted on the inner wall of the rotating cylinder 14. The sliding groove 8 corresponds to the boss 9. A protruding post 20 is fixedly mounted on one end face of the rotating cylinder 14. A ball bearing 19 is mounted on the top of the protruding post 20. An inclined plate 18 is fixedly mounted on the inner wall of the crushing box 2. The ball bearing 19 corresponds to the inclined surface of the inclined plate 18. A screen 11 is fixedly and inclinedly mounted on the sorting discharge box 3. An eccentric wheel 12 is fixedly mounted on the circumferential outer wall of the drive shaft 7. A groove 13 is opened on the side wall of the eccentric wheel 12.

[0025] A second connecting rod 17 is slidably disposed within the groove 13, and a first connecting rod 16 is fixedly disposed on the inner wall of the crushing box 2. The second connecting rod 17 is vertically slidably disposed on the first connecting rod 16.

[0026] A motor 15 is fixedly installed on one side of the outer wall of the crushing box 2. The motor 15 is coaxially fixedly connected to one end of the transmission shaft 7. Hammer blades 10 are fixedly arranged in a ring array on the outer wall of the rotating cylinder 14.

[0027] The bottom of the sorting and discharging box 3 is fixedly provided with a fine material discharge port 5, and a coarse material discharge port 6 is opened on the side wall of the sorting and discharging box 3. The coarse material discharge port 6 is located on the lower side of the screen 11, and the fine material discharge port 5 is located directly below the screen 11.

[0028] The swashplate 18 is made of magnet, and the rotating cylinder 14 is made of magnetic material.

[0029] In practical use, the motor 15 is first started, which drives the transmission shaft 7 to rotate. The rotating drum 14 then rotates synchronously under the traction of the transmission shaft 7. The hammers 10 then begin crushing the raw materials. Because the inclined plate 18 is made of magnets and the rotating drum 14 is made of magnetic material, the balls 19 and the inclined plate 18 remain in contact under the influence of magnetism. As the rotating drum 14 rotates, the balls 19 move in a circular motion while rolling on the surface of the inclined plate 18. This movement, via the protrusion 20, drives the rotating drum 14 to move synchronously, causing it to slide horizontally back and forth along the groove 8. This achieves the reciprocating movement of the rotating drum 14 and the hammers 10 within the crushing chamber 2, ensuring that the hammers 10 thoroughly crush the raw materials.

[0030] After crushing, the raw materials enter the sorting discharge box 3. At this time, the eccentric wheel 12 rotates synchronously with the rotating drum 14. The eccentric wheel 12 drives the connecting rod 17 to move up and down. The connecting rod 17 drives the lower end to intermittently impact the screen 11, causing the screen 11 to shake. When the raw materials fall onto the screen 11, due to the shaking of the screen 11, the raw materials placed on the screen 11 begin to vibrate synchronously. Under the combined action of inertia and gravity generated by the vibration, the raw materials smaller than the screen hole diameter pass through the screen holes and are discharged from the fine material discharge port 5, while the raw materials larger than the screen hole diameter cannot pass through and are discharged from the coarse material discharge port 6 along the inclined direction of the screen 11.

[0031] If any person skilled in the art, inspired by this invention, designs a similar structure or embodiment without departing from the spirit of this invention, such design should fall within the protection scope of this invention.

Claims

1. A raw material crushing and grading device for straw pulping, characterized in that: Includes a frame (4), a crushing box (2) fixedly mounted on the frame (4), a feed hopper (1) fixedly mounted on the crushing box (2), and a sorting discharge box (3) fixedly mounted on the lower side of the crushing box (2). A drive shaft (7) is rotatably mounted on the side wall of the crushing box (2). A boss (9) is fixedly mounted on the circumferential side wall of the drive shaft (7). A rotating cylinder (14) is horizontally slidably mounted on the outer wall of the drive shaft (7). A groove (8) is fixedly mounted on the inner wall of the rotating cylinder (14). 8) Corresponding to the boss (9), a protruding post (20) is fixedly provided on one side end face of the rotating cylinder (14), and a ball bearing (19) is provided on the top of the protruding post (20). An inclined plate (18) is fixedly installed on the inner wall of the crushing box (2), and the ball bearing (19) corresponds to the inclined surface of the inclined plate (18). A screen (11) is fixedly installed at an angle on the sorting discharge box (3). An eccentric wheel (12) is fixedly sleeved on the outer circumference of the transmission shaft (7), and a groove (13) is opened on the side wall of the eccentric wheel (12).

2. The straw pulping and grading device according to claim 1, characterized in that: A second connecting rod (17) is slidably provided in the groove (13), and a first connecting rod (16) is fixedly provided on the inner wall of the crushing box (2). The second connecting rod (17) is slidably provided on the first connecting rod (16).

3. The straw pulping and grading device according to claim 2, characterized in that: A motor (15) is fixedly installed on one side of the outer wall of the crushing box (2). The motor (15) is coaxially fixedly connected to one end of the transmission shaft (7). Hammers (10) are fixedly arranged in a ring array on the outer wall of the rotating cylinder (14).

4. The straw pulping and grading device according to claim 3, characterized in that: The bottom of the sorting discharge box (3) is fixedly provided with a fine material discharge port (5), and a coarse material discharge port (6) is opened on the side wall of the sorting discharge box (3). The coarse material discharge port (6) is located on the lower side of the screen (11), and the fine material discharge port (5) is located directly below the screen (11).

5. The straw pulping and grading device according to claim 4, characterized in that: The swashplate (18) is made of magnets, and the rotating cylinder (14) is made of magnetic material.

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