Garbage primary screening device used in coal conveying system

Abstract

The utility model provides a garbage primary screening device used in a coal conveying system, which relates to the technical field of garbage primary screening in the coal conveying system and comprises a blanking box, a storage bin, supporting legs, a partition plate, a through groove, a sleeve, a hook rod, a separating rod, a fixed shaft, a motor, a bottom plate, a movable block, a fixed block, a through hole, a mounting seat and a sliding rod. The device further comprises a sliding block connected with the two sliding rods in a sliding mode, an inserting rod matched with the through hole is arranged at the bottom of the sliding block, and a handle is arranged on one side of the sliding block. Therefore, the number of large non-combustible coal gangues and various easily-blocked objects entering the crusher can be effectively reduced, the wall hanging phenomenon in the crusher and blockage of the crusher are avoided, meanwhile, after the large non-combustible coal gangues are screened out, the quality of pulverized coal can be improved, a boiler is kept in an excellent combustion state, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of primary screening of garbage in a coal conveying system, in particular to a primary screening device for garbage in a coal conveying system. Background Art

[0002] The coal transportation system is one of the most important systems in a thermal power plant. The coal transportation system is divided into two parts. One part is to transfer the coal transported by the ship to the dry coal shed where the coal is stored to ensure a certain inventory. The other part is to transfer the coal in the dry coal shed to the coal bunker for use by the boiler. A crusher is installed in the middle of this part to crush the large-particle coal into coal powder that can be fully burned in the boiler.

[0003] When coal enters the crusher, plastic bags, woven bags, rubber leather and other easily blocked objects in the coal will be entangled in the vertical wall of the crusher and form a hanging wall. Long-term use will cause the crusher to be blocked. At the same time, large pieces of incombustible coal gangue will be crushed by the crusher and enter the boiler together with coal powder for combustion, which will also cause the boiler to have poor combustion status and make it difficult to meet usage requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a garbage primary screening device for a coal conveying system, aiming to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the garbage primary screening device used in the coal conveying system includes a blanking box, the blanking box has a feeding port and a discharging port, a storage bin is arranged on one side of the blanking box, the blanking box is through-connected with the storage bin, the bottoms of the blanking box and the storage bin are both provided with supporting legs, a partition is arranged at the junction of the blanking box and the storage bin, the upper end of the partition is evenly provided with through grooves, a sleeve is arranged above the partition, a hook rod is evenly arranged on the outer surface of the sleeve, the hook rod can pass through the through groove on the partition when rotating with the sleeve, a separation rod is evenly arranged on one side of the partition, the hook rod can rotate with the sleeve, Passing through between two adjacent separation rods, a fixed shaft is provided inside the sleeve, and a motor for driving the fixed shaft to rotate is provided on the outer surface of the blanking box. The lower end of the storage bin is open, and a rotatable bottom plate is provided at the lower end opening of the storage bin, and a movable block is provided at the end of the bottom plate away from the blanking box, and a fixed block is provided on the outer surface of the storage bin, and through holes are provided on the movable block and the fixed block, and a mounting seat is provided on the outer surface of the storage bin, and two sliding rods are provided between the fixed block and the mounting seat, and also includes a slider slidably connected to the two sliding rods, and the bottom of the slider is provided with an insertion rod matching the through hole, and a handle is provided on one side of the slider.

[0006] Preferably, it also includes a limiting rod, one end of which is arranged on the outer surface of the storage bin and is rotatably connected to the storage bin, a waist hole is opened on the limiting rod, and a fixing pin is arranged on one side of the bottom plate, and the fixing pin is located inside the waist hole.

[0007] Preferably, baffles are respectively provided on both sides of the bottom plate.

[0008] Preferably, a material guide trough is provided at the bottom of the material box, and the material guide trough is used to collect the coal powder discharged from the material box.

[0009] Preferably, a material guide plate is provided inside the material drop box.

[0010] The beneficial effects of the utility model are:

[0011] The device can screen out large pieces of incombustible gangue and various easily blocked materials in the pulverized coal, thereby effectively reducing the number of large pieces of incombustible gangue and various easily blocked materials entering the crusher, avoiding the wall hanging phenomenon in the crusher and causing the crusher to be blocked. At the same time, after the large pieces of incombustible gangue are screened out, the quality of the pulverized coal can also be improved, so that the boiler can maintain an excellent combustion state and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a specific embodiment of the utility model.

[0013] Figure 2 It is a schematic diagram of the structure inside the blanking box and storage bin.

[0014] Figure 3 It is a side view of a specific embodiment of the utility model.

[0015] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0016] Figure 5 It is a structural schematic diagram of a partition according to a specific embodiment of the utility model.

[0017] Figure 6 It is a structural schematic diagram of a sleeve and a hook rod in a specific embodiment of the utility model.

[0018] In the figure: 1. first conveyor belt; 2. second conveyor belt; 3. blanking box; 4. storage bin; 5. supporting leg; 6. partition; 7. sleeve; 8. hook rod; 9. separation rod; 10. fixed shaft; 11. motor; 12. bottom plate; 13. movable block; 14. fixed block; 15. mounting seat; 16. sliding rod; 17. slider; 18. plug rod; 19. handle; 20. limit rod; 21. fixing pin; 22. baffle; 23. material guide trough; 24. mounting frame; 25. material guide plate. DETAILED DESCRIPTION

[0019] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-6 As shown, a garbage primary screening device for a coal conveying system comprises a blanking box 3, the blanking box 3 has a feeding port and a discharging port, a storage bin 4 is arranged on one side of the blanking box 3, the blanking box 3 is connected with the storage bin 4, and supporting legs 5 are arranged at the bottom of the blanking box 3 and the storage bin 4, a partition 6 is arranged at the junction of the blanking box 3 and the storage bin 4, and a through groove is evenly opened at the upper end of the partition 6, a sleeve 7 is arranged above the partition 6, and a hook rod 8 is evenly arranged on the outer surface of the sleeve 7, and the hook rod 8 can pass through the through groove on the partition 6 when the sleeve 7 rotates, and a separation rod 9 is evenly arranged on one side of the partition 6, and the hook rod 8 can pass through between two adjacent separation rods 9 when the sleeve 7 rotates, and the inner surface of the sleeve 7 A fixed shaft 10 is provided at the bottom, a motor 11 for driving the fixed shaft 10 to rotate is provided on the outer surface of the blanking box 3, the lower end of the storage bin 4 is open, a rotatable bottom plate 12 is provided at the lower end opening of the storage bin 4, a movable block 13 is provided at the end of the bottom plate 12 away from the blanking box 3, a fixed block 14 is provided on the outer surface of the storage bin 4, through holes are provided on the movable block 13 and the fixed block 14, a mounting seat 15 is provided on the outer surface of the storage bin 4, two sliding rods 16 are provided between the fixed block 14 and the mounting seat 15, and also includes a slider 17 slidably connected to the two sliding rods 16, the bottom of the slider 17 is provided with an insertion rod 18 matching the through hole, and a handle 19 is provided on one side of the slider 17.

[0021] The coal conveying system also includes a first conveyor belt 1 and a second conveyor belt 2. The first conveyor belt 1 is used to convey coal into a drop box 3. After passing through the drop box 3, the coal falls onto the second conveyor belt 2 and is conveyed out through the second conveyor belt 2.

[0022] When the coal passes through the blanking box 3, the large pieces of incombustible gangue and various easy-to-block objects mixed in the coal can be screened out through the primary screening device, while the coal powder can pass through the blanking box 3 normally. Specifically, the control motor 11 is started, clicked to drive the fixed shaft 10 to rotate, the fixed shaft 10 drives the sleeve 7 to rotate synchronously, and the sleeve 7 drives the hook rod 8 to rotate synchronously. The moving direction of the hook rod 8 in the blanking box 3 is opposite to the moving direction of the coal when passing through the blanking box 3, that is, the coal moves downward in the blanking box 3, and the hook rod 8 moves upward. Figure 2In the state, the hook rod 8 rotates clockwise, and the coal powder continues to fall downward through the gap between the hook rods 8, and large pieces of incombustible coal gangue and easy-to-block objects fall onto the hook rod 8. As the hook rod 8 follows the rotation of the sleeve 7, the large pieces of incombustible coal gangue and easy-to-block objects on the hook rod 8 are transferred from the blanking box 3 to the storage bin 4, and under the action of the self-gravity of the large pieces of incombustible coal gangue and easy-to-block objects, they slide into the storage bin 4, and through the provided separation rod 9, before the hook rod 8 passes through the through groove on the partition 6, the easy-to-block objects on the hook rod 8 can be pre-cleaned, thereby preventing the hook rod 8 from bringing the easy-to-block objects wrapped around the hook rod 8 back into the blanking box 3, and the partition 6 is used to prevent the large pieces of incombustible coal gangue and various easy-to-block objects located at the bottom of the storage bin 4 from re-entering the blanking box 3.

[0023] When it is necessary to clean up the large pieces of incombustible coal gangue and various easily blocked objects in the storage bin 4, it is only necessary to control the handle 19 to move horizontally and pull out the insertion rod 18 from the through holes of the movable block 13 and the fixed block 14. The floor at the bottom of the storage bin 4 will flip over, so that the large pieces of incombustible coal gangue and various easily blocked objects in the storage bin 4 can be discharged to the outside from the bottom of the storage bin 4. The large pieces of incombustible coal gangue and various easily blocked objects in the storage bin 4 can be transferred by setting a bucket cart or a conveyor belt at the bottom of the storage bin 4. After completing the removal of the large pieces of incombustible coal gangue and various easily blocked objects in the storage bin 4, rotate the bottom plate 12 and make the bottom plate 12 close the lower end opening of the storage bin 4, then move the handle 19 and pass the insertion rod 18 through the movable block 13 and the fixed block 14, so that the bottom plate 12 can close the lower end opening of the storage bin 4, so that the storage bin 4 can continue to collect large pieces of incombustible coal gangue and various easily blocked objects.

[0024] Furthermore, it also includes a limit rod 20, one end of which is arranged on the outer surface of the storage bin 4 and is rotatably connected to the storage bin 4, a waist hole is opened on the limit rod 20, and a fixing pin 21 is arranged on one side of the bottom plate 12, and the fixing pin 21 is located inside the waist hole. The limit rod 20 is used to limit the opening angle between the bottom plate 12 and the storage bin 4. When the bottom plate 12 is opened, the fixing pin 21 on the bottom plate 12 can maintain contact with the bottom side of the waist hole on the limit rod 20, thereby limiting the bottom plate 12 from continuing to rotate, which is beneficial to controlling the rotation angle of the bottom plate 12, and is convenient for guiding large pieces of incombustible coal gangue and various easily blocked objects in the storage bin 4 to the side close to the handle 19, so as to facilitate the removal of large pieces of incombustible coal gangue and various easily blocked objects.

[0025] Furthermore, baffles 22 are provided on both sides of the bottom plate 12 to prevent large pieces of incombustible coal gangue and various easily blocked objects in the storage bin 4 from sliding off the bottom plate 12 and sliding outward from both sides of the bottom plate 12 .

[0026] Furthermore, a material guide trough 23 is provided at the bottom of the material box 3, and the material guide trough 23 is used to collect the coal powder discharged from the material box 3. The area of ​​the lower end opening of the material guide trough 23 is smaller than the area of ​​the discharge port at the bottom of the material box 3, thereby reducing the dispersion degree of the coal powder to prevent the coal powder from scattering outside the second conveyor belt 2.

[0027] Furthermore, a guide plate 25 is provided inside the blanking box 3, and the coal powder entering the blanking box 3 can be transported to the side of the blanking box 3 away from the storage bin 4 through the guide plate 25, which can reduce the amount of coal powder directly entering the storage bin 4.

[0028] A mounting frame 24 is provided on the outer surface of the blanking box 3 , and the motor 11 is fixed on the mounting frame 24 .

[0029] The device can screen out large pieces of incombustible gangue and various easily blocked materials in the pulverized coal, thereby effectively reducing the number of large pieces of incombustible gangue and various easily blocked materials entering the crusher, avoiding the wall hanging phenomenon in the crusher and causing the crusher to be blocked. At the same time, after the large pieces of incombustible gangue are screened out, the quality of the pulverized coal can also be improved, so that the boiler can maintain an excellent combustion state and the use effect is good.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A garbage primary screening device for a coal conveying system, characterized in that: The invention comprises a material drop box (3), wherein the material drop box (3) has a material feed port and a material discharge port, a storage bin (4) is arranged on one side of the material drop box (3), the material drop box (3) and the storage bin (4) are connected in a through manner, the bottoms of the material drop box (3) and the storage bin (4) are both provided with supporting legs (5), a partition (6) is arranged at the junction of the material drop box (3) and the storage bin (4), a through groove is evenly formed at the upper end of the partition (6), a sleeve (7) is arranged above the partition (6), a hook rod (8) is evenly arranged on the outer surface of the sleeve (7), the hook rod (8) can pass through the through groove on the partition (6) when rotating with the sleeve (7), a separation rod (9) is evenly arranged on one side of the partition (6), the hook rod (8) can pass through between two adjacent separation rods (9) when rotating with the sleeve (7), and a fixed shaft is arranged inside the sleeve (7). (10), the outer surface of the blanking box (3) is provided with a motor (11) for driving the fixed shaft (10) to rotate, the lower end of the storage bin (4) is open, and a rotatable bottom plate (12) is provided at the lower end opening of the storage bin (4), and a movable block (13) is provided at the end of the bottom plate (12) away from the blanking box (3), and the outer surface of the storage bin (4) is provided with a fixed block (14), and through holes are provided on the movable block (13) and the fixed block (14), and the outer surface of the storage bin (4) is provided with a mounting seat (15), and two sliding rods (16) are provided between the fixed block (14) and the mounting seat (15), and also includes a slider (17) slidably connected to the two sliding rods (16), and the bottom of the slider (17) is provided with an insertion rod (18) matched with the through hole, and a handle (19) is provided on one side of the slider (17).

2. The garbage primary screening device for a coal conveying system according to claim 1 is characterized in that: It also includes a limiting rod (20), one end of which is arranged on the outer surface of the storage bin (4) and is rotatably connected to the storage bin (4), a waist hole is opened on the limiting rod (20), and a fixing pin (21) is arranged on one side of the bottom plate (12), and the fixing pin (21) is located inside the waist hole.

3. The garbage primary screening device for a coal conveying system according to claim 1 is characterized in that: Baffles (22) are respectively arranged on both sides of the bottom plate (12).

4. The garbage primary screening device for a coal conveying system according to claim 1 is characterized in that: A material guide trough (23) is provided at the bottom of the material box (3), and the material guide trough (23) is used to collect the coal powder discharged from the material box (3).

5. The garbage primary screening device for a coal conveying system according to claim 1 is characterized in that: A material guide plate (25) is arranged inside the material drop box (3).

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