Straw screening equipment
By designing a straw selection equipment including screening mesh plate, shaft rod, mixing rod and reset spring, the screening mesh clog caused by long strips of straw particles after cutting is solved, and efficient straw screening and environmental cleaning are achieved.
Patent Information
- Application Number
- CN202420390582.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-03-01
AI Technical Summary
When using straw to make organic fertilizer, long strips of straw that have not been cut are often mixed in the cut straw particles, which will affect the subsequent organic fertilizer manufacturing process and require screening using screening equipment, but the screening mesh is prone to clogging, affecting the screening efficiency.
A straw screening equipment is designed, which adopts screening components including connecting blocks, limit slide rods, screening mesh plates, return springs, shafts, mixing rods, contact blocks and oblique blocks. The shaft and mixing rods are driven to rotate through a reduction motor, combined with the design of return springs and oblique blocks, so that the screening mesh plates vibrate, avoid long straw blocks, and remove dust through negative pressure fans and air guide grooves.
It effectively prevents screening, ensures the smooth completion of straw screening, improves screening efficiency, and maintains the cleanliness of the processing environment through the design of negative pressure fans and air guide tanks.
Smart Images
Figure CN222753717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of organic fertilizer processing, and more specifically to a straw screening device. Background Art
[0002] Organic fertilizer refers to a type of fertilizer that contains organic matter and can provide crops with a variety of inorganic and organic nutrients, as well as improve soil fertility. Straw is a material for making organic fertilizer. When using straw to make organic fertilizer, the long strips of straw must first be crushed and cut into small particles before it can be made.
[0003] When using the cut straw particles to make organic fertilizer, due to defects in the cutting stage, some uncut long strips of straw will be mixed into the cut straw particles. The presence of this part of straw will affect the subsequent manufacturing process of organic fertilizer. In order to ensure the smooth production of subsequent organic fertilizer, it is necessary to use screening equipment to screen the cut straw particles. When screening, most of them use a screen with a suitable aperture. However, during the use of the screen, the straw particles are often stuck on the surface of the screen, affecting the screening operation of the screening equipment on the straw. In view of this, the utility model proposes a straw screening device with the effect of preventing the screen from being blocked. Utility Model Content
[0004] In order to overcome the above defects of the prior art, the utility model provides a straw screening device to solve the problems existing in the above background technology.
[0005] The utility model provides the following technical solution: a straw screening device, comprising a screening box, a feed hopper is embedded on the top of the screening box, a discharge port is opened on the front of the screening box, a material receiving net bag is arranged inside the screening box corresponding to the discharge port, and a screening component is arranged on the inner wall of the screening box between the feed hopper and the material receiving net bag;
[0006] The screening assembly includes a connecting block welded to the inner wall of the screening box, a limiting slide rod is penetrated on the surface of the connecting block, a screening mesh plate is fixedly installed on the top of the limiting slide rod, a connecting rod is fixedly installed on the inner bottom wall of the screening box, a motor box is fixedly installed on the end of the connecting rod away from the inner wall of the screening box, a reduction motor is fixedly installed inside the motor box, the output shaft of the reduction motor extends to the top of the motor box and is fixedly installed with a shaft rod, an avoidance hole is opened on the surface of the screening mesh plate corresponding to the shaft rod, the shaft rod extends to the upper side of the screening mesh plate through the avoidance hole and is fixedly installed with a stirring rod, and a contact block is welded on the surface of the shaft rod, and an inclined block is welded on the surface of the screening mesh plate. When the shaft rod rotates, the contact block contacts the inclined block to drive the screening mesh plate downward.
[0007] Furthermore, a return spring is sleeved on the surface of the limit slide rod, the bottom end of the return spring is pressed against the upper surface of the connecting block, and the top end of the return spring is pressed against the lower surface of the screening screen.
[0008] Furthermore, a slag discharge window is provided on the right side of the screening box corresponding to the screening mesh plate, and a sealing plate for sealing the slag discharge window is hinged on the surface of the screening box, a locking screw is threadedly connected to the surface of the sealing plate, and an internal threaded hole for the locking screw to be screwed into the side wall of the screening box.
[0009] Furthermore, a slag discharge chute is welded on the right side of the screening box corresponding to the slag discharge window.
[0010] Furthermore, a negative pressure pipe is embedded in the bottom end of the screening box, a negative pressure fan is fixedly installed at the air outlet end of the negative pressure pipe, and an air guide groove extending to the bottom and side of the material receiving net bag is opened on the inner bottom wall of the screening box, and the air guide groove is connected to the air inlet end of the negative pressure pipe.
[0011] Furthermore, a dust filter plate is detachably mounted inside the negative pressure pipe via bolts.
[0012] Furthermore, a frustum is fixedly mounted on the top of the motor box, and the frustum cover is arranged on the output shaft surface of the reduction motor.
[0013] Technical effects and advantages of the utility model:
[0014] 1. The utility model adds the cut straw particles into the screening box from the feed hopper, and screens the straw particles by means of the screening mesh plate. During the screening process, the shaft rod and the stirring rod are driven to rotate by the reduction motor to stir the straw particles, and the contact block and the inclined block are periodically pressed against each other by the rotation of the shaft rod, driving the screening mesh plate to move downward, and then the screening mesh plate is moved up and reset under the elastic force of the reset spring, so that the screening mesh plate vibrates, ensuring that the straw particles can smoothly pass through the screening mesh plate to complete the screening, ensuring that the screening action is successfully completed, and in the screening process, short straw particles can normally pass through the mesh holes of the screening mesh plate and fall downward to the inside of the receiving net bag, while the ends of long straw particles will be stuck in the mesh holes of the screening mesh plate, and then this part of the long straw will continue to rotate with the stirring rod at the upper end of the screening mesh plate under the driving action of the stirring rod, avoiding the long straw particles from clogging the mesh holes of the screening mesh plate, further ensuring the smooth completion of the straw screening action.
[0015] 2. The utility model starts the negative pressure fan during the screening process of straw particles, utilizes the negative pressure pipe and the air guide groove to transmit the negative pressure to the outer wall of the receiving net bag and the inside of the screening box, and filters the airflow through the dust filter screen, so as to prevent the dust on the surface of the straw from flying out of the screening box and affecting the cleanliness of the external processing environment during the screening process; after the screening is completed, the long straw remains on the surface of the screening screen, and by turning the locking screw and opening the sealing plate, the long straw can be discharged from the screening box through the slag discharge window and the slag discharge chute, thus completing the cleaning of the screening box for reuse. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the front section structure of the utility model;
[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;
[0019] Figure 4 It is a left-side structural schematic diagram of the oblique block of the utility model.
[0020] The accompanying drawings are marked as follows: 1. screening box; 2. feed hopper; 3. discharge port; 4. material receiving net bag; 5. connecting block; 6. limit slide bar; 7. screening mesh plate; 8. connecting rod; 9. reduction motor; 10. shaft rod; 11. stirring rod; 12. contact block; 13. inclined block; 14. return spring; 15. sealing plate; 16. locking screw; 17. slag discharge chute; 18. negative pressure pipe; 19. negative pressure fan; 20. air guide trough; 21. dust filter mesh plate; 22. cone. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solution of the utility model in conjunction with the drawings in the utility model. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The straw screening equipment involved in the utility model is not limited to the various structures recorded in the following embodiments. All other implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0022] Reference Figure 1-4 The utility model provides a straw screening device, including a screening box 1, a feed hopper 2 is embedded on the top of the screening box 1, a discharge port 3 is opened on the front of the screening box 1, a receiving net bag 4 is arranged inside the screening box 1 corresponding to the discharge port 3, and a screening component is arranged on the inner wall of the screening box 1 between the feed hopper 2 and the receiving net bag 4.
[0023] The screening component includes a connecting block 5 welded to the inner wall of the screening box 1, a limiting slide bar 6 is passed through the surface of the connecting block 5, a screening screen 7 is fixedly installed on the top of the limiting slide bar 6, a reset spring 14 is sleeved on the surface of the limiting slide bar 6, the bottom end of the reset spring 14 is tightly pressed against the upper surface of the connecting block 5, and the top end of the reset spring 14 is tightly pressed against the lower surface of the screening screen 7.
[0024] A connecting rod 8 is fixedly installed on the inner bottom wall of the screening box 1, and a motor box is fixedly installed on one end of the connecting rod 8 away from the inner wall of the screening box 1. A reduction motor 9 is fixedly installed inside the motor box, and a frustum 22 is fixedly installed on the top of the motor box. The frustum 22 covers the output shaft surface of the reduction motor 9.
[0025] By providing the frustum 22, it is possible to avoid the accumulation of straw particles on the top of the motor box.
[0026] The output shaft of the reduction motor 9 extends to the top of the motor box and is fixedly installed with a shaft rod 10. An avoidance hole is opened on the surface of the screening mesh plate 7 corresponding to the shaft rod 10. The shaft rod 10 extends to the upper side of the screening mesh plate 7 through the avoidance hole and is fixedly installed with a stirring rod 11. A contact block 12 is welded on the surface of the shaft rod 10, and an inclined block 13 is welded on the surface of the screening mesh plate 7. When the shaft rod 10 rotates, the contact block 12 contacts the inclined block 13 to drive the screening mesh plate 7 to move downward.
[0027] When the straw screening equipment is used to screen straw particles, the entire equipment is connected to an external power control system, the straw particles are added from the feed hopper 2 into the screening box 1, the screening mesh plate 7 is used to screen the straw particles, and the reduction motor 9 is started. The shaft 10 and the stirring rod 11 are driven by the reduction motor 9 to rotate, and the straw particles are stirred. The rotation of the shaft 10 drives the contact block 12 and the inclined block 13 to be periodically pressed against each other, driving the screening mesh plate 7 to move downward, and then the screening mesh plate 7 is moved up and reset under the elastic force of the reset spring 14, causing the screening mesh plate 7 to vibrate, which can ensure that the straw particles pass through the screening mesh plate 7 smoothly to complete the screening, and ensure that the screening action is completed smoothly.
[0028] During the screening process, short straw particles can normally pass through the mesh holes of the screening mesh plate 7 and fall downward into the receiving net bag 4, while the ends of long straw particles will be stuck in the mesh holes of the screening mesh plate 7. Then, this part of the long straw will continue to rotate with the stirring rod 11 at the upper end of the screening mesh plate 7 under the driving action of the stirring rod 11, thereby preventing the long straw particles from clogging the mesh holes of the screening mesh plate 7, and further ensuring the smooth completion of the straw screening action.
[0029] A slag discharge window is provided on the right side of the screening box 1 corresponding to the screening mesh plate 7, and a sealing plate 15 for sealing the slag discharge window is hinged on the surface of the screening box 1, a locking screw 16 is threadedly connected to the surface of the sealing plate 15, and an internal threaded hole for the locking screw 16 to be screwed into the side wall of the screening box 1 is provided.
[0030] A slag discharge chute 17 is welded on the right side of the screening box 1 corresponding to the slag discharge window.
[0031] After the screening is completed, the long straw remains on the surface of the screening mesh plate 7. By turning the locking screw 16 and opening the sealing plate 15, the long straw can be discharged from the screening box 1 through the slag discharge window and the slag discharge chute 17, completing the cleaning work of the screening box 1 so that it can be used again.
[0032] A negative pressure pipe 18 is embedded at the bottom end of the screening box 1, and a negative pressure fan 19 is fixedly installed at the air outlet end of the negative pressure pipe 18. The inner bottom wall of the screening box 1 is provided with an air guide groove 20 extending to the bottom and side of the material receiving net bag 4. The air guide groove 20 is connected to the air inlet end of the negative pressure pipe 18, and a dust filter screen plate 21 is detachably installed inside the negative pressure pipe 18 by bolts.
[0033] On the other hand, during the screening process of straw particles, the negative pressure fan 19 is started, and the negative pressure is transmitted to the outer wall of the receiving net bag 4 and the interior of the screening box 1 by using the negative pressure pipe 18 and the air guide groove 20, and the air flow is filtered by the dust filter screen 21, which can prevent the dust on the surface of the straw from flying out of the screening box 1 during the screening process and affecting the cleanliness of the external processing environment.
[0034] Finally, it should be noted that the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures may refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention may be combined with each other.
Claims
1. A straw screening device, comprising a screening box (1), characterized in that: A feed hopper (2) is embedded on the top of the screening box (1), a discharge port (3) is provided on the front of the screening box (1), a material receiving net bag (4) is provided inside the screening box (1) corresponding to the discharge port (3), and a screening component is provided on the inner wall of the screening box (1) between the feed hopper (2) and the material receiving net bag (4); The screening assembly comprises a connection block (5) welded to the inner wall of the screening box (1), a limit slide bar (6) is passed through the surface of the connection block (5), a screening screen plate (7) is fixedly mounted on the top of the limit slide bar (6), a connecting rod (8) is fixedly mounted on the inner bottom wall of the screening box (1), a motor box is fixedly mounted on one end of the connecting rod (8) away from the inner wall of the screening box (1), a reduction motor (9) is fixedly mounted inside the motor box, and the output shaft of the reduction motor (9) extends to the upper side of the motor box. A shaft (10) is fixedly installed on the surface of the screening mesh plate (7), a avoidance hole is opened on the surface of the screening mesh plate (7) corresponding to the shaft (10), the shaft (10) extends through the avoidance hole to the upper side of the screening mesh plate (7) and a stirring rod (11) is fixedly installed, and a contact block (12) is welded on the surface of the shaft (10), and an inclined block (13) is welded on the surface of the screening mesh plate (7). When the shaft (10) rotates, the contact block (12) and the inclined block (13) come into contact with each other to drive the screening mesh plate (7) to move downward.
2. A straw screening device according to claim 1, characterized in that: The surface of the limit slide bar (6) is sleeved with a return spring (14), the bottom end of the return spring (14) is pressed against the upper surface of the connecting block (5), and the top end of the return spring (14) is pressed against the lower surface of the screening screen (7).
3. The straw screening device according to claim 1, characterized in that: The right side of the screening box (1) is provided with a slag discharge window corresponding to the screening mesh plate (7), and a sealing plate (15) for sealing the slag discharge window is hingedly connected to the surface of the screening box (1), a locking screw (16) is threadedly connected to the surface of the sealing plate (15), and an internal threaded hole for the locking screw (16) to be screwed into is provided on the side wall of the screening box (1).
4. The straw screening device according to claim 3, characterized in that: A slag discharge chute (17) is welded on the right side of the screening box (1) corresponding to the slag discharge window.
5. The straw screening device according to claim 1, characterized in that: A negative pressure pipe (18) is embedded at the bottom end of the screening box (1), a negative pressure fan (19) is fixedly installed at the air outlet end of the negative pressure pipe (18), and an air guide groove (20) extending to the bottom and side of the material receiving net bag (4) is opened on the inner bottom wall of the screening box (1), and the air guide groove (20) is connected to the air inlet end of the negative pressure pipe (18).
6. The straw screening device according to claim 5, characterized in that: A dust filter screen plate (21) is detachably mounted inside the negative pressure pipe (18) via bolts.
7. The straw screening device according to claim 1, characterized in that: A frustum (22) is fixedly mounted on the top of the motor box, and the frustum (22) is covered on the output shaft surface of the reduction motor (9).