Large pellet crushing device of disc pelletizer

Abstract

The utility model belongs to the technical field of large pellet crushing of iron and steel enterprises, and particularly discloses a large pellet crushing device of a disc pelletizer, which comprises a support and a grate net, the support is positioned on one side of the pelletizer, the grate net is positioned between the support and a pelletizing disc of the pelletizer, and a crushing component for crushing large pellets is arranged on the support. A telescopic piece used for adjusting the inclination angle of the grate net is arranged on the support, a first support is fixedly connected to the support, a second support is fixedly connected to the grate net, and the first support is connected with the second support through a pin shaft. An existing crusher used for crushing large pellets can damage qualified pellets. The grate net is driven by the piston rod of the outward-pushing air cylinder to extend into the pelletizing disc to be in contact with pellets, a certain amount of pellets are wrapped on the grate net, large pellets with the pellet diameter larger than 30 mm can stay on the grate net, the grate net is driven by the piston rod of the recycling air cylinder to adjust the angle, and the pellets on the grate net roll down along the grate net and pass through the crushing assembly on the way. And the reamer rotating at a high speed is in contact with the large pellets, so that the large pellets are crushed.

Description

Technical Field

[0001] The utility model relates to the technical field of large lump crushing in pelletizing of iron and steel enterprises, and particularly relates to a large pellet crushing device for a disc pelletizer. Background Art

[0002] With the accelerating development speed of the industrialization process, industrial automation, intelligence, intrinsic safety, and unmanned operation are becoming increasingly perfect. The disc pelletizer is a device widely used in industrial fields such as iron and steel, non-ferrous metallurgy, cement, and fertilizer. The disc pelletizer is used for the production of iron ore pellets in the metallurgical industry and the pelletizing production of mixed concentrates of non-ferrous metals. The basic working principle of the common disc pelletizer at present is as follows: during operation, coke powder, limestone powder (or quicklime), and iron ore concentrate powder are mixed in a mixer and then input into the feeding device at the upper part of the disc pelletizer. The feeding device evenly supplies materials to the pelletizer, and at the same time, atomized water spray is supplied by a water spraying device. The inclined disc rotates by mechanical drive, and the mixed material with sprayed water rolls into balls in the disc. The produced formed balls fall from the disc onto the conveyor belt. After screening, the qualified pellets enter the next process, and the unqualified pellets are returned to the mixer for further processing.

[0003] During the process of fine powder pelletizing in the pelletizing disc, pellets with a diameter greater than or equal to 30 mm are likely to be produced. In production, pellets with a diameter greater than or equal to 30 mm are often called large pellets, and this part of the large pellets cannot be used for production. Therefore, during the pelletizing process, a device that can break large pellets is needed to crush the unqualified pellets so that they can be used for production. Under the existing technology, there are already devices for crushing large pellets, such as the patent with the application number 202211536971.9 and the publication number CN115608446A. The basic principle of the large pellet crushing device in this patent is as follows: a camera controlled by a computer system is used to detect and locate large pellets in the pelletizing disc. A crusher is arranged above the pelletizing disc, and the falling action of the crusher is realized through a positioning device and a rope hoisting device. The crusher and the large pellets rotate with the disc. During the rotation process, the crusher continuously collides with the large pellets, and finally, the large pellets in the pelletizing disc are crushed.

[0004] However, for the large pellet crushing device described in this patent, the crusher used to crush large pellets crushes the large pellets in the pelletizing disc. During the pelletizing process, there are not only large pellets that need to be crushed in the pelletizing disc but also qualified pellets. During the process of the crusher continuously colliding with the large pellets, the impact force generated is inevitable to damage the qualified pellets, resulting in some qualified pellets having to be processed again due to damage, thus affecting the final pelletizing rate. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a large pellet crushing device for a disk pelletizer, so as to solve the problem that the crusher for crushing large pellets in the above patent will damage qualified pellets.

[0006] To achieve the above purpose, the basic solution provided by the present utility model is: a large pellet crushing device for a disk pelletizer, including a bracket and a screen. The bracket is located on one side of the pelletizer, and the screen is located between the bracket and the pelletizing disk of the pelletizer. A crushing assembly for crushing large pellets is provided on the bracket, a telescopic member for adjusting the inclination angle of the screen is provided on the bracket, a support one is fixedly connected to the bracket, a support two is fixedly connected to the screen, and the support one and the support two are connected by a pin shaft.

[0007] The principle and beneficial effects of the present utility model are as follows: By controlling the telescopic member to drive the screen to tilt downward at a certain angle, the front end of the screen extends into the pelletizing disk to contact the pellets, and a certain amount of pellets are collected on the upper surface of the screen. The large pellets with a ball diameter greater than or equal to 30 mm will stay on the screen. Then, control the telescopic member to drive the screen to tilt upward at a certain angle. At this time, the distance between the screen and the crushing assembly is reduced to a specific distance, and the pellets on the screen will roll down along the screen. On the way, they pass through the crushing assembly, and the rotating reamer of the crushing assembly contacts the large pellets to break the large pellets. By using the telescopic movement of the telescopic member to drive the screen to tilt at a certain angle, the screening of large pellets with a ball diameter greater than or equal to 30 mm is realized, and the large pellets are crushed on the screen by the crushing assembly, effectively avoiding the contact between the crushing assembly and the qualified pellets with a ball diameter less than 30 mm, which is convenient for crushing large pellets outside the pelletizing disk.

[0008] Solution two, this is the optimization of the basic solution. The crushing assembly includes a rotating shaft, a motor and a V-belt. A bearing seat is fixedly connected to the bracket, the rotating shaft is rotatably connected to the bearing seat, a pulley one is fixedly connected to one end of the rotating shaft, a pulley two is fixedly connected to the output shaft of the motor, and the pulley one and the pulley two are connected by a V-belt drive. A reamer is fixedly connected to the rotating shaft, and the rotating shaft and the reamer are located between the screen and the bracket. The motor drives the rotating shaft and the reamer to rotate through the linkage of the pulley one, the V-belt and the pulley two to crush the large pellets. It is convenient to use the rotation of the reamer to crush the large pellets.

[0009] Solution 3, which is the optimization of the basic solution. The telescopic member includes a cylinder. There is a fixed support three on the bracket. One end of the cylinder is pin-connected to the support three. There is a fixed support four on the screen. The piston rod of the cylinder is pin-connected to the support four. The air inlet end and the air return end of the cylinder are connected to a pneumatic control box. By setting the telescopic member as a cylinder with its bottom end hinged to the support three and the output end of the piston rod hinged to the support four, when the pneumatic control box drives the piston rod of the cylinder to extend outwards, it drives the screen to tilt downwards at a certain angle until the head end of the screen contacts the pellets in the pelletizing pan to catch a certain amount of pellets on the screen. At the same time, the cylinder will also tilt downwards at a certain angle with the screen. When the pneumatic control box drives the piston rod of the cylinder to retract inwards, it drives the screen to rise at a certain angle to make the pellets on the screen roll down along the screen. At the same time, the cylinder will also tilt upwards at a certain angle with the screen.

[0010] Solution 4, which is the optimization of the basic solution. Baffles are provided on both sides of the screen. The setting of the baffles facilitates catching pellets on the screen and can prevent the pellets from falling out of the screen from both sides.

[0011] Solution 5, which is the optimization of Solution 2. The material of the reamer is rubber. Rubber material has good elasticity and smoothness. During the crushing process, the surface of the rubber reamer can quickly restore its shape, reducing the residence time of the material on the reamer. At the same time, the smooth surface of the rubber is not easy for the material to adhere to. The wear resistance of the rubber material is relatively good, and it can maintain a good surface state even when in contact with the material for a long time.

[0012] Solution 6, which is the optimization of the basic solution. A polytetrafluoroethylene coating is provided on the outer wall of the screen. Polytetrafluoroethylene has strong chemical inertness. The polytetrafluoroethylene coating has good heat resistance, cold resistance, corrosion resistance, acid resistance, alkali resistance and other properties, and has an extremely low surface energy, making it difficult for other substances to adhere to its surface, thus achieving an anti-sticking effect. Through the setting of the polytetrafluoroethylene coating, it is convenient to prevent the screen from sticking materials to a certain extent and avoid excessive waste of materials. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a large pellet crushing device for a disk pelletizer;

[0014] Figure 2 is a front view of a large pellet crushing device for a disk pelletizer;

[0015] Figure 3 is a top view of a large pellet crushing device for a disk pelletizer. Detailed Description of the Invention

[0016] The following further elaborates on the present invention through specific embodiments:

[0017] The figure marks in the drawings of the specification include: bracket 1, grate 2, support one 3, support two 4, rotating shaft 5, motor 6, V-belt 7, bearing seat 8, pulley one 9, pulley two 10, reamer 11, cylinder 12, support three 13, support four 14, pneumatic control box 15, baffle 16, pelletizing machine 17.

[0018] Example

[0019] like Figures 1 to 3 As shown: a large pellet crushing device of a disc pelletizing machine, including a bracket 1 and a grate 2, the bracket 1 is located on one side of the pelletizing machine 17, the grate 2 is located between the bracket 1 and the pelletizing disc of the pelletizing machine 17, baffles 16 are welded on both sides of the grate 2, the outer wall of the grate 2 is brushed with a polytetrafluoroethylene coating, a support 1 3 is welded on the bracket 1, a support 2 4 is welded on the grate 2, and the support 1 3 is pin-connected to the support 2 4.

[0020] A crushing assembly for crushing large pellets is provided on the bracket 1, and the crushing assembly includes a rotating shaft 5, a motor 6 and a V-belt 7. A bearing seat 8 is welded on the bracket 1, and the rotating shaft 5 is rotatably connected to the bearing seat 8. A pulley 1 9 is welded at one end of the rotating shaft 5, and a pulley 2 10 is welded to the output shaft of the motor 6. The pulley 1 9 is connected to the pulley 2 10 through the V-belt 7. A reamer 11 is welded on the rotating shaft 5, and the rotating shaft 5 and the reamer 11 are located between the grate 2 and the bracket 1, and the reamer 11 is made of rubber.

[0021] The bracket 1 is provided with a telescopic part for adjusting the inclination angle of the grate 2, and the telescopic part includes a cylinder 12. A support three 13 is welded on the bracket 1, one end of the cylinder 12 is pin-connected to the support three 13, a support four 14 is welded on the grate 2, the piston rod of the cylinder 12 is pin-connected to the support four 14, and the air inlet end and the air return end of the cylinder 12 are connected to a pneumatic control box 15.

[0022] The implementation method of this embodiment is:

[0023] When it is necessary to salvage the pellets from the pelletizing disk of the pelletizing machine 17 onto the grate 2, the cylinder control box 15 is operated to drive the piston rod of the cylinder 12 to move toward the grate 2, and the head end of the grate 2 then extends into the pelletizing disk and contacts the pellets. After a period of stagnation, large pellets with a diameter greater than or equal to 30 mm will remain on the grate 2, and qualified pellets with a diameter less than 30 mm will fall back into the pelletizing disk through the gaps on the grate 2.

[0024] When large pellets need to be crushed and there are many large pellets retained on the grate, the cylinder control box 15 is operated to drive the piston rod of the cylinder 12 to move away from the grate 2, and the grate 2 is deflected toward the bracket 1. The large pellets are displaced in the inclined direction of the grate 2. The large pellets pass through the crushing assembly, and the high-speed rotating reamer 11 contacts the large pellets and crushes them. The crushed pellets will leave the range of the pelletizing disk and be transported to the large and small ball roller screens for screening together with the qualified pellets by the pelletizing belt.

[0025] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A large pellet crushing device for a disk pelletizer, characterized in that, It includes a support (1) and a screen (2). The support (1) is located on one side of the pelletizing machine (17), and the screen (2) is located between the support (1) and the pelletizing pan of the pelletizing machine (17). A crushing component for crushing large pellets is provided on the support (1), a telescopic member for adjusting the inclination angle of the screen (2) is provided on the support (1), a first support (3) is fixedly connected to the support (1), a second support (4) is fixedly connected to the screen (2), and the first support (3) is pin-connected to the second support (4).

2. The large pellet crushing device of a disc pelletizing machine according to claim 1, characterized in that The crushing component includes a rotating shaft (5), a motor (6) and a V-belt (7). A bearing seat (8) is fixedly connected to the support (1), the rotating shaft (5) is rotatably connected to the bearing seat (8), a first pulley (9) is fixedly connected to one end of the rotating shaft (5), a second pulley (10) is fixedly connected to the output shaft of the motor (6), the first pulley (9) and the second pulley (10) are connected by the V-belt (7) for transmission, a reamer (11) is fixedly connected to the rotating shaft (5), and the rotating shaft (5) and the reamer (11) are located between the screen (2) and the support (1).

3. The large pellet crushing device of a disc pelletizer according to claim 1, characterized in that, The telescopic member includes a cylinder (12). A third support (13) is fixedly connected to the support (1), one end of the cylinder (12) is pin-connected to the third support (13), a fourth support (14) is fixedly connected to the screen (2), the piston rod of the cylinder (12) is pin-connected to the fourth support (14), and a pneumatic control box (15) is connected to the air inlet end and the air return end of the cylinder (12).

4. A large pellet crushing device for a disk pelletizing machine according to claim 1, characterized in that , baffles (16) are provided on both sides of the screen (2).

5. The large pellet crushing device of a disc pelletizer according to claim 2, characterized in that , the reamer (11) is made of rubber.

6. The large pellet crushing device of a disc pelletizer according to claim 1, characterized in that , a polytetrafluoroethylene coating is provided on the outer wall of the screen (2).

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