Cement ball mill ball forging and screening device

Abstract

The utility model belongs to cement production field relates to a cement ball mill ball forging screening device, including base, mount, transmission shaft and screening cylinder, at least two mounts are fixedly arranged on the base, and one transmission shaft is rotatably supported between the mount, transmission shaft is along the longitudinal and is arranged in the inside of screening cylinder, and is fixedly connected with screening cylinder, the wall of screening cylinder is provided with screening hole, and the aperture of screening hole is gradiently increased along the feeding end to the discharge end direction of screening cylinder, one end of transmission shaft is connected with servo motor transmission, is used for driving screening cylinder rotates around its axis. The utility model can realize grinding body high efficiency, accurate, multistage synchronous screening, can replace the traditional backward artificial screening mode, adapts the urgent need of modernization cement production lean management and safety production.

Description

Technical Field

[0001] This utility model belongs to the field of cement production and relates to a ball mill forging and screening device for cement ball mills. Background Technology

[0002] In cement production, ball mills are key equipment for material grinding. The gradation of their grinding media (steel balls, forged steel) directly affects grinding efficiency, energy consumption, and final product quality. As the equipment continues to operate, the grinding media will shrink in size and change shape due to wear and impact. At the same time, damage to the partition plates may cause grinding media of different specifications to mix, resulting in an imbalance in the gradation of the grinding media. This leads to a series of problems such as a decrease in the hourly output of the ball mill, an increase in energy consumption, and substandard product fineness.

[0003] Therefore, regularly screening, cleaning, and re-grading the grinding media in ball mills is an important maintenance measure to ensure the stable and efficient operation of the grinding system. Currently, common screening methods mainly rely on manual labor, specifically dumping all the grinding media onto the factory floor and having workers sort them using simple sieves or by hand. This traditional method has the following significant drawbacks: 1. It relies entirely on manual labor, resulting in a slow screening process that severely impacts equipment maintenance progress and production recovery time; 2. It is labor-intensive and carries high safety risks: the large weight and quantity of grinding media make manual handling and screening extremely easy to cause operator fatigue and pose serious safety hazards such as falls and injuries; 3. Simple sieves can usually only achieve coarse separation of a single particle size, failing to achieve precise grading of multiple sizes of grinding media in a single operation, making it difficult to meet the requirements of scientific gradation; 4. The screening process generates severe dust, posing a threat to the occupational health of operators and causing environmental pollution; 5. Although the investment in manual screening equipment is low, the time-consuming process, large workforce, and high safety and health risks result in high overall maintenance costs.

[0004] To address the aforementioned issues, there is an urgent need to develop a specialized device with a high degree of mechanization and automation, capable of efficient, precise, and multi-stage synchronous screening of grinding media, to replace the traditional and outdated manual screening methods and meet the pressing needs of modern cement production lean management and safe production. Utility Model Content

[0005] The purpose of this invention is to provide a ball mill forging screening device for cement ball mills, which can achieve efficient, precise, and multi-stage synchronous screening of grinding media. It can replace the traditional and outdated manual screening method and meet the urgent needs of modern cement production lean management and safe production.

[0006] The technical solution adopted by this utility model is a ball mill forging screening device for cement ball mill, including a base, a fixed frame, a transmission shaft and a screening cylinder;

[0007] At least two fixed brackets are fixedly installed on the base, and a drive shaft is rotatably supported between the fixed brackets;

[0008] The drive shaft runs longitudinally through the inside of the screening cylinder and is fixedly connected to the screening cylinder; the screening cylinder is arranged with its axis as a reference and the whole is inclined at a slope of 5‰.

[0009] The screening cylinder has screening holes on its wall, and the diameter of the screening holes increases gradually from the feed end to the discharge end of the screening cylinder.

[0010] One end of the drive shaft is connected to a servo motor to drive the screening cylinder to rotate around its axis.

[0011] The features of this utility model also include:

[0012] Furthermore, a bracket is fixedly connected to the base, and a feeding hopper is installed at the top of the bracket; the feeding hopper is located on the feed side of the screening cylinder, and its discharge port faces the inside of the screening cylinder.

[0013] Furthermore, a ladder is fixedly installed on one side of the support, extending from the ground to the feeding port near the feeding hopper.

[0014] Furthermore, the base is equipped with wheels via support rods, with at least four wheels.

[0015] Furthermore, the base has at least one partition inside, which divides the interior of the base into multiple independent material collection areas. Each material collection area corresponds to a different aperture section on the screening cylinder, so as to collect the material screened by different apertures respectively.

[0016] Furthermore, the bottom of each collection area is constructed as an inclined guide surface, allowing materials to slide down along the guide surface under gravity to the centralized discharge port at the end of the collection area.

[0017] Furthermore, a discharge hopper is installed at the centralized discharge port. The bottom plate of the discharge hopper is an inclined plane or a trough-shaped slope, which forms a guiding channel that facilitates the centralized flow of materials to the external container.

[0018] Furthermore, a vibration motor is installed on the guide surface of each of the aggregate areas.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. This utility model adopts a rotating screen cylinder with a gradient aperture to achieve synchronous and precise separation of waste, steel forging, and steel balls in one operation. The screening efficiency and accuracy far exceed those of manual screening, providing a guarantee for restoring the optimal gradation of the ball mill.

[0021] 2. This utility model utilizes fully automated mechanized operations to replace the heavy and dangerous "human wave tactics," significantly reducing labor intensity and fundamentally eliminating the health risks of personnel injury and dust inhalation.

[0022] 3. This utility model integrates feeding, screening, and multi-channel collection, and is equipped with wheels, which can be flexibly moved to the work site to achieve rapid deployment and clean production, greatly improving the convenience of maintenance work and the on-site environment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is the front view of the present invention;

[0025] Figure 2 This is the left view of the present invention;

[0026] Figure 3 This is the right view of the present invention;

[0027] In the diagram, 1. Base, 2. Fixing frame, 3. Drive shaft, 4. Screening cylinder, 5. Support, 6. Feed hopper, 7. Ladder, 8. Support rod, 9. Traveling wheel, 10. Baffle plate, 11. Guide surface, 12. Discharge hopper, 13. Round steel, 14. Washer, 15. Baffle plate, 16. Vibration motor, 18. Servo motor, 19. Drive wheel, 20. Driven wheel, 21. Chain, 22. Vibration motor box. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 3 The present invention will be described in detail with reference to specific embodiments:

[0030] A ball mill ball forging screening device includes a base 1, a fixed frame 2, a drive shaft 3, and a screening cylinder 4;

[0031] At least two fixed brackets 2 are fixedly installed on the base 1, and a drive shaft 3 is rotatably supported between the fixed brackets 2;

[0032] The drive shaft 3 is longitudinally inserted inside the screening cylinder 4 and is fixedly connected to the screening cylinder 4; the screening cylinder 4 is inclined at a slope of 5‰ with its axis as the reference.

[0033] Screening holes are provided on the wall of the screening cylinder 4, and the diameter of the screening holes increases gradually from the feed end to the discharge end of the screening cylinder 4.

[0034] One end of the drive shaft 3 is connected to the servo motor 18 for driving the screening cylinder 4 to rotate around its axis.

[0035] A bracket 5 is fixedly connected to the base 1, and a feeding hopper 6 is installed at the top of the bracket 5; the feeding hopper 6 is located on the feeding side of the screening cylinder 4, and its discharge port faces the inside of the screening cylinder 4.

[0036] A ladder 7 is fixedly installed on one side of the bracket 5, and the ladder 7 extends from the ground to the feeding port near the feeding hopper 6.

[0037] The base 1 has four wheels 9 mounted on its bottom via a support rod 8.

[0038] The base 1 has at least one partition 10 inside, which divides the interior of the base 1 into multiple independent material collection areas. Each material collection area corresponds to a different aperture section on the screening cylinder 4, so as to collect the materials screened by different apertures respectively.

[0039] The bottom of each collection area is constructed as an inclined guide surface 11, allowing materials to slide down along the guide surface 11 under gravity to the centralized discharge port at the end of the collection area.

[0040] A discharge hopper 12 is installed at the centralized discharge port. The bottom plate of the discharge hopper 12 is an inclined plane or a trough-shaped slope, which forms a material guiding channel that facilitates the centralized flow of materials to the external container.

[0041] Example 1

[0042] A ball mill ball forging screening device, as shown in the reference. Figures 1 to 3 As shown, the device includes a base 1, a mounting bracket 2, a drive shaft 3, and a screening cylinder 4. The base 1 is typically welded from a sturdy steel plate, and its bottom is equipped with four wheels 9 via support rods 8, allowing the entire device to move flexibly. Two mounting brackets 2 are fixedly mounted on the upper surface of the base 1, and a drive shaft 3 is rotatably supported between these two mounting brackets 2 via bearing seats.

[0043] The screening cylinder 4 is made of wear-resistant steel plate and is fixedly connected to the drive shaft 3 by flange or welding, so that the drive shaft 3 is longitudinally inserted through the center of the screening cylinder 4. The screening cylinder 4 is inclined at a slope of 5‰ with its axis as the reference. One end of the drive shaft 3 is connected to a servo motor 18 through a coupling, or a gear is installed at the end of the drive shaft 3 and the output end of the servo motor 18, and the two gears are connected by a chain drive. After the servo motor 18 is started, it can drive the screening cylinder 4 to rotate smoothly around its own axis.

[0044] The wall of the screening cylinder 4 is functionally divided into an ash and slag discharge zone and a screen ball zone. The screen ball zone is further divided along the material's direction of travel into a first screen ball zone, a second screen ball zone, and a third screen ball zone. To achieve graded screening, the screen aperture diameters for each zone are set as follows:

[0045] Ash and slag discharge area: Located at the beginning of the screening cylinder 4, its screen hole diameter is 12mm, mainly used to discharge powder waste and fine slag generated in the mill.

[0046] The first sieving zone is adjacent to the ash and slag discharge zone. Its sieve aperture is also 12mm, and it is used to screen out waste ball forgings that are damaged, too small, or unusable.

[0047] The second sieve zone: located after the first sieve zone, its sieve aperture ranges from 12mm to 20mm, and is used to screen out medium-sized ball forgings that need to be sorted or reused.

[0048] The third sieve ball zone: located at the end of the sieve cylinder 4, its sieve hole diameter is greater than 20mm, allowing large-sized ball forgings that can still be used to pass through and be collected.

[0049] A bracket 5 is fixedly connected to the base 1, and a feeding hopper 6 is installed at the top of the bracket 5. The feeding hopper 6 is located on the feeding side of the screening cylinder 4 (i.e., at the end of the ash and slag discharge area), and its lower discharge port faces the inside of the screening cylinder 4 to ensure that the spherical forging mixture to be screened can be accurately fed in. To facilitate feeding by operators, a ladder 7 is fixedly installed on one side of the bracket 5. The ladder 7 is built from the ground and extends to the position close to the feeding port of the feeding hopper 6.

[0050] The interior of the base 1 is divided into four independent collection zones by three welded partitions 10. These four collection zones, from left to right, correspond to the ash and slag discharge zone below the screening cylinder 4 and the first, second, and third screening ball zones, respectively, for collecting materials screened through different apertures. The bottom of each collection zone is constructed as an inclined guide surface 11, and a vibration motor 16 is installed on the guide surface 11 of each collection zone, so that the falling material can automatically slide down to the centralized discharge port at the end of the zone under the action of gravity. At each centralized discharge port, a discharge hopper 12 is installed. The bottom plate of these discharge hoppers 12 is designed as a downward inclined groove-shaped slope of 45°, which together form an efficient material guiding channel, facilitating the centralized introduction of the graded ball forgings or waste into the ton bags placed below.

[0051] To facilitate the fixing of the ton bags, two round steel bars with a diameter of 12 mm and a length of 120 mm are symmetrically welded to the outer walls on both sides of each discharge hopper 12 as load-bearing components for hanging the ton bags.

[0052] To accommodate the ton bag inlet size and prevent the bag opening from falling off, four washers are welded around the perimeter of each discharge hopper 12, corresponding to the position of the ton bag lifting strap. The washers have an outer diameter of 24 mm and an inner diameter of 20 mm, forming a reliable rope threading point.

[0053] To prevent the high-speed falling steel balls from spilling outside the ton bag opening due to inertia, a vertically installed baffle is hinged to the front side of each discharge hopper 12 to effectively guide and confine the material inside the ton bag.

[0054] The ball mill forging and screening device for cement ball mills provided in Example 1 solves the problems of low labor efficiency and heavy workload associated with traditional ball milling and screening methods. The ball milling process using a self-made ball milling machine is simple and easy to operate, replacing purely manual labor with mechanization, significantly improving work efficiency. A total of four people completed the screening of 45 tons of steel balls in the first chamber of the cement mill in three working days. One person was specifically responsible for discharging material from the mill body into the receiving hopper transported by a forklift; one person was responsible for controlling the discharge opening after the forklift transported the receiving hopper to the ball milling machine's feed hopper; and the other two people were responsible for monitoring the amount of ton bags being loaded, hanging the ton bags, and controlling the electrical control switches. Compared with traditional ball milling operations, the work cycle is shortened by at least two-thirds, and the number of workers is reduced by at least two-thirds for the same work cycle. This significantly reduces maintenance time and manpower, lowers the labor intensity of operators, and effectively improves work efficiency.

[0055] The ball mill forging screening device provided by this utility model operates as follows: During use, the operator pours the ball forging mixture taken from the cement ball mill into the feeding hopper 6 via ladder 7. The mixture enters the continuously rotating screening cylinder 4 under gravity. Due to the rotation and tilting of the screening cylinder, the material tumbles along the cylinder wall and moves towards the discharge end. Dust and slag smaller than 12mm fall first from the ash and slag discharge area and the first screening area; subsequently, ball forgings between 12mm and 20mm in size are screened out from the second screening area; finally, intact ball forgings larger than 20mm are screened out from the third screening area. Different grades of material fall into their corresponding collection areas. At this time, the vibration motor 16 is activated to ensure that the material slides smoothly and without stagnation on the guide surface 11, and finally slides along the guide surface 11 through the discharge hopper 12 into the suspended ton bag below. Among them, the round steel 13, washer 14 and baffle plate 15 on the discharge hopper 12 work together to ensure the rapid, stable fixation of the ton bag and the efficient, spill-free collection process, thereby completing the cleaning and precise grading of the ball forging in one go, which greatly improves the screening efficiency and the degree of automation of the operation.

[0056] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A ball mill forging screening device for cement ball mills, characterized in that, It includes a base (1), a fixing frame (2), a drive shaft (3), and a screening cylinder (4); At least two fixed brackets (2) are fixedly installed on the base (1), and a transmission shaft (3) is rotatably supported between the fixed brackets (2). The drive shaft (3) is longitudinally inserted inside the screening cylinder (4) and is fixedly connected to the screening cylinder (4). The screening cylinder (4) is arranged with its axis as a reference and the whole is inclined at a slope of 5‰. The screening cylinder (4) has screening holes on its cylinder wall, and the diameter of the screening holes increases gradually from the feed end to the discharge end of the screening cylinder (4). One end of the drive shaft (3) is connected to the servo motor (18) for driving the screening cylinder (4) to rotate around its axis.

2. The ball mill forging screening device for cement ball mills according to claim 1, characterized in that, A bracket (5) is fixedly connected to the base (1), and a feeding hopper (6) is installed at the top of the bracket (5); the feeding hopper (6) is located on the feeding side of the screening cylinder (4), and its discharge port faces the inside of the screening cylinder (4).

3. The ball mill forging screening device for cement ball mills according to claim 2, characterized in that, A ladder (7) is fixedly installed on one side of the bracket (5), and the ladder (7) extends from the ground to the feeding port of the feeding hopper (6).

4. The ball mill forging screening device for cement ball mills according to claim 2, characterized in that, The base (1) has wheels (9) mounted on its bottom via support rods (8), and the number of wheels (9) is at least four.

5. The ball mill forging screening device for cement ball mills according to claim 2, characterized in that, The base (1) is provided with at least one partition (10) inside, which divides the interior of the base (1) into multiple independent material collection areas. Each material collection area corresponds to a different aperture section on the screening cylinder (4) to collect materials screened by different apertures.

6. The ball mill forging screening device for cement ball mills according to claim 5, characterized in that, The bottom of each of the collection areas is constructed as an inclined guide surface (11), and the material can slide down along the guide surface (11) under the action of gravity to the centralized discharge port at the end of the collection area.

7. The ball mill forging screening device for cement ball mills according to claim 6, characterized in that: A discharge hopper (12) is installed at the centralized discharge port. The bottom plate of the discharge hopper (12) is an inclined plane or a trough-shaped inclined surface, which forms a material guiding channel that facilitates the centralized flow of materials to the external container.

8. The ball mill forging screening device for cement ball mills according to claim 6, characterized in that, Each of the aggregate collection areas has a guide surface (11) equipped with a vibration motor (16).

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