A scraping device for spreading material at the center of a vertical mill disc

Abstract

This utility model discloses a material spreading and scraping device at the center of a vertical mill grinding disc, belonging to the technical field of vertical mill grinding disc applications. It is installed inside the vertical mill grinding disc and includes a material guiding cone groove. A reinforcing support is provided on the outer side of the lower end of the material guiding cone groove. The reinforcing support includes a central upright and diagonal braces on both sides of the upright. A spreading horizontal steel bar is provided at the lower end of the central upright of the reinforcing support via a second connecting bolt and a locking assembly. The locking assembly includes an upper connecting block and a lower connecting block located on the side ends of the reinforcing support and the spreading horizontal steel bar. An upper support block is provided on the side end of the upper connecting block, and a lower support block is provided on the side end of the lower connecting block. A movable rod is movably connected between the upper and lower support blocks via an upper connecting pin and a lower connecting pin. This utility model solves the technical problem in the prior art where the conical material pile cannot be cleaned in a timely manner during continuous production.

Description

Technical Field

[0001] This utility model belongs to the technical field of vertical mill grinding disc application, specifically a material spreading and scraping device at the center of a vertical mill grinding disc. Background Technology

[0002] Vertical roller mills (referred to as vertical mills) use an intermediate feeding method. The raw materials are sent into the mill by a screw conveyor and fall into the center of the grinding disc. Then, the centrifugal force generated by the rotation of the grinding disc disperses them. However, the moisture content of the raw materials is generally around 10%. There are materials that have been ground and dried inside the mill. The newly fed wet materials are prone to caking when they come into contact with the dry materials. Moreover, the raw materials that are continuously fed into the mill cannot be separated by the centrifugal force in time, which will promote caking. Over a long period of production, this cannot be handled and will slowly accumulate in the center of the vertical mill, forming a cone-shaped pile of material. Due to the continuous nature of production, the inability to promptly clean the conical material pile will cause the following problems: 1. Over time, the material will accumulate, and changes in height may cause blockage at the discharge port, hindering material flow and affecting raw material transportation. The material radius will slowly increase, affecting the uniform spreading of the material under centrifugal force and impacting equipment stability; 2. The cumulative conical material pile will rotate under the drive of the grinding disc, increasing the weight of the grinding disc and the energy required for its rotation, resulting in significant energy loss; 3. Under the long-term effects of high temperature and moisture inside the mill, the piled material will clump and harden. Especially with the water slag raw material used by our company, the clumping is difficult to clean, severely increasing the burden on employees. Therefore, it is necessary to develop a material spreading and scraping device at the center of the vertical mill grinding disc to solve the above technical problems. Utility Model Content

[0003] To address the above problems, this utility model provides a material spreading and scraping device at the center of a vertical mill disc, which solves the technical problem that the conical material pile cannot be cleaned in a timely manner during continuous production in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A material spreading and scraping device at the center of a vertical mill disc is installed inside the mill disc. It includes a material guiding cone groove, and a reinforcing support is provided on the outer side of the lower end of the material guiding cone groove. The reinforcing support includes a central upright and diagonal bars on both sides of the upright. A horizontal steel bar is provided at the lower end of the central upright of the reinforcing support through a second connecting bolt and a locking assembly. The locking assembly includes an upper connecting block and a lower connecting block provided on the side of the reinforcing support and the horizontal steel bar. An upper support block is provided on the side of the upper connecting block, and a lower support block is provided on the side of the lower connecting block. A movable rod is movably connected between the upper support block and the lower support block through an upper connecting pin and a lower connecting pin.

[0006] As a further improvement to the above solution, the movable rod is designed with a U-shaped structure.

[0007] As a further improvement to the above solution, a cotter pin is provided at the lower connecting pin.

[0008] As a further improvement to the above solution, the lower end of the material guide cone groove is connected to the reinforcing support through a connecting plate and the first connecting bolt.

[0009] As a further improvement to the above scheme, the flat horizontal steel is set as a channel steel structure and is made of wear-resistant material.

[0010] As a further improvement to the above solution, a cable protection pipe is installed inside the flat horizontal steel. The cable protection pipe is located on the upper part of the flat horizontal steel and is tightly connected to the flat horizontal steel. The cable protection pipe contains a cable, which is connected to the outside to form a circuit and is also connected to an external alarm device.

[0011] As a further improvement to the above solution, the cable is configured to withstand a high temperature of 200°C.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides a material spreading and scraping device at the center of the grinding disc of a vertical mill. Using this device, materials are more easily and evenly fed into the grinding zone, ensuring stable operation of the vertical mill and improving production efficiency. Materials no longer frequently stick to the grinding disc, reducing cleaning and maintenance time and significantly lowering the overall maintenance cost. The absence of conical accumulation inside the grinding disc is equivalent to a lighter disc, reducing energy consumption and saving costs.

[0014] 2. This device also features a compact structure, small size, convenient manufacturing and installation, quick and easy replacement, easy inspection and maintenance, high cost-effectiveness, low cost and easy implementation.

[0015] 3. The flat horizontal steel bar is connected to the reinforcing support via locking components. This connection method ensures both the strength of the connection and ease of installation and disassembly, facilitating maintenance and replacement of the device. (Lock)

[0016] 4. Install a path detection device to prevent the flat horizontal channel steel from falling and affecting the equipment during operation. The 12V low voltage path protection device is simple, safe and highly stable. Attached Figure Description

[0017] Figure 1 This is a front view of the present invention.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a schematic diagram of the locking component in this utility model.

[0020] In the diagram: 1. Material guide cone groove; 2. Connecting plate; 3. Reinforcing support; 4. Conical material accumulation; 5. Flat horizontal steel; 6. Vertical mill grinding disc; 7. First connecting bolt; 8. Material bed; 9. Second connecting bolt; 10. Locking assembly; 101. Upper connecting block; 102. Upper connecting pin; 103. Upper support block; 104. Movable rod; 105. Lower connecting block; 106. Lower connecting pin; 107. Cotter pin; 108. Lower support block. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0022] like Figure 1-3 As shown, the specific solution of this embodiment is as follows: a material spreading scraping device at the center of a vertical mill grinding disc is installed inside the vertical mill grinding disc 6, including a material guiding cone groove 1. A reinforcing support 3 is provided on the outer side of the lower end of the material guiding cone groove 1. The reinforcing support 3 includes a vertical rod in the middle and diagonal rods on both sides of the vertical rod. A flat horizontal steel 5 is provided at the lower end of the vertical rod in the middle of the reinforcing support 3 through a second connecting bolt 9 and a locking assembly 10. The locking assembly 10 includes an upper connecting block 101 and a lower connecting block 105 provided on the side ends of the reinforcing support 3 and the flat horizontal steel 5. An upper support block 103 is provided on the side end of the upper connecting block 101, and a lower support block 108 is provided on the side end of the lower connecting block 105. A movable rod 104 is movably connected between the upper support block 103 and the lower support block 108 through an upper connecting pin 102 and a lower connecting pin 106.

[0023] The horizontal steel bar 5, through its pushing action, gradually flattens the material in the center of the vertical mill's grinding disc 6, forming a material bed 8, which provides favorable conditions for the grinding operation of the main roller of the vertical mill. This interaction allows the material to enter the grinding zone more evenly, ensuring the stability and production efficiency of the vertical mill.

[0024] As a preferred embodiment of the above, the movable rod 104 is configured as a U-shaped structure.

[0025] As a preferred embodiment of the above, a cotter pin 107 is provided at the lower connecting pin 106, which can effectively prevent the lower connecting pin from loosening or falling off during operation.

[0026] As a preferred embodiment of the above, the lower end of the material guide cone 1 is connected to the reinforcing support 3 through the connecting plate 2 and the first connecting bolt 7. This connection method makes the connection between the material guide cone 1 and the reinforcing support 3 more stable and firm.

[0027] As a preferred embodiment of the above, the flat horizontal steel bar 5 is configured as a channel steel structure and is made of a wear-resistant material. The channel steel structure of the flat horizontal steel bar 5 provides high strength and stability, enabling it to withstand significant material pressure and the forces generated by the grinding disc's operation. Furthermore, using a wear-resistant material for the flat horizontal steel bar effectively extends its service life and reduces the frequency of replacement due to wear.

[0028] In a preferred embodiment, a cable protection pipe is installed inside the horizontal steel beam 5. The cable protection pipe is located on top of the horizontal steel beam 5 and is tightly connected to it. A cable is installed inside the cable protection pipe, and this cable is connected to the outside to form a circuit (the cable is provided with a 12V low-voltage path). This ensures that if the horizontal steel beam falls, it can break the cable, disconnect the circuit, and trigger an external alarm device for timely handling, thus avoiding equipment damage caused by the falling horizontal steel beam. The cable is designed to withstand temperatures up to 200°C.

[0029] The vertical mill's central scraping device consists of a material guide cone groove 1, a reinforcing support 3, the vertical mill disc 6, and a horizontal steel strip 5. The main motor of the vertical mill drives a vertical planetary reducer via a coupling, causing the grinding disc to rotate horizontally at a constant speed. A continuous stream of slag material enters the grinding disc and accumulates in the center of the vertical mill disc 6 in a conical shape, forming a conical accumulation 4. The initial material falling into the vertical mill disc 6 contains moisture and is not easily dispersed. This material is guided into the grinding disc by the material guide cone groove 1 under gravity. Due to the high moisture content, the material has a certain degree of adhesion and cannot be quickly pushed to the grinding area around the grinding disc by centrifugal force. The horizontally rotating grinding disc drives the material to rotate as well. A stationary flattening scraper pushes the material in the grinding disc through the bottom flattening crossbar 5. Under the push of the flattening channel steel, the material in the center of the grinding disc gradually flattens to form a flat material bed 8. The main roller of the vertical mill can then grind the material. This greatly alleviates the problems of roller fluctuations caused by uneven material flow, which in turn leads to vertical mill vibration and large pressure fluctuations in the main roller. Because the flattening crossbar 5 is in long-term contact with the material, it can be replaced with wear-resistant material to increase its service life.

[0030] There should be a certain distance between the horizontal channel steel and the grinding disc of the vertical mill. This distance depends on the normal operating material layer height and should be slightly higher than the operating material layer height of the vertical mill.

[0031] The locking assembly 10 plays a crucial role in the material spreading and scraping device at the center of the vertical mill grinding disc. Its main function is to ensure a stable and secure connection between the spreading crossbar 5 and the reinforcing support 3, thereby guaranteeing the reliability and durability of the entire device during operation. Furthermore, the design of the locking assembly 10 allows for precise adjustment of the position of the spreading crossbar 5 to adapt to different working conditions, optimizing material distribution and grinding effect. The use of the locking assembly 10 effectively protects the spreading crossbar 5 from direct impact and wear, extending its service life and simplifying the maintenance and replacement process of the device.

[0032] The upper connecting block 101 and the lower connecting block 105 are respectively fixed to the side ends of the reinforcing support 3 and the flat horizontal steel 5, forming a stable support structure. The upper support block 103 and the lower support block 108 are respectively connected to the side ends of the upper connecting block 101 and the lower connecting block 105, providing necessary support for the flat horizontal steel 5. The movable rod 104 is connected to the upper support block 103 and the lower support block 108 through the upper connecting pin 102 and the lower connecting pin 106, and is movably connected, allowing the position of the flat horizontal steel 5 to be adjusted within a certain range. The cotter pin 107 is used to fix the lower connecting pin 106 to prevent it from loosening or falling off during operation, ensuring the connection firmness of the locking assembly 10. By adjusting the position of the upper connecting pin 102 and the lower connecting pin 106, the flat horizontal steel 5 can be locked or released, thereby facilitating the installation, disassembly and maintenance of the device. This design allows the locking assembly 10 to flexibly adapt to different working requirements while maintaining the stability and reliability of the entire device.

[0033] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A material spreading and scraping device at the center of a vertical mill disc, disposed within the vertical mill disc (6), characterized in that, The material guide cone groove (1) is provided with a reinforcing support (3) on the outer side of the lower end of the material guide cone groove (1). The reinforcing support (3) includes a central upright and diagonal bars on both sides of the upright. The lower end of the central upright of the reinforcing support (3) is provided with a flat horizontal steel (5) through a second connecting bolt (9) and a locking assembly (10). The locking assembly (10) includes an upper connecting block (101) and a lower connecting block (105) provided on the side of the reinforcing support (3) and the flat horizontal steel (5). An upper support block (103) is provided on the side of the upper connecting block (101), and a lower support block (108) is provided on the side of the lower connecting block (105). A movable rod (104) is movably provided between the upper support block (103) and the lower support block (108) through an upper connecting pin (102) and a lower connecting pin (106).

2. The material spreading and scraping device at the center of the vertical mill disc according to claim 1, characterized in that, The movable rod (104) is designed with a U-shaped structure.

3. The material spreading and scraping device at the center of the vertical mill disc according to claim 1, characterized in that, A cotter pin (107) is provided at the lower connecting pin (106).

4. The material spreading and scraping device at the center of the vertical mill disc according to claim 1, characterized in that, The lower end of the material guide cone groove (1) is connected to the reinforcing support (3) through the connecting plate (2) and the first connecting bolt (7).

5. The material spreading and scraping device at the center of the vertical mill disc according to claim 1, characterized in that, The horizontal steel (5) is set as a channel steel structure and is made of wear-resistant material.

6. The material spreading and scraping device at the center of the vertical mill disc according to claim 1, characterized in that, A cable protection pipe is installed inside the flat horizontal steel (5). The cable protection pipe is located on the upper part of the flat horizontal steel (5) and connected to the flat horizontal steel (5). The cable protection pipe contains a cable, which is connected to the outside to form a circuit and is also connected to an alarm device installed outside.

7. The material spreading and scraping device at the center of a vertical mill disc according to claim 1, characterized in that, The cable is designed to withstand temperatures up to 200°C.

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