Combined feeding device of ball mill

Abstract

The utility model relates to a ball mill combined feeding device which comprises a feeding installation table and a material box installed above the feeding installation table, the material box comprises a buffering bin body and a discharging bin body, a feeding port is formed in the top of the buffering bin body, an overflow port is formed in the side wall of the buffering bin body, and the discharging bin body is located on one side of the buffering bin body and communicated with the overflow port. An abrasive hopper is mounted at the top of the discharging bin body, and a discharging opening is formed in the bottom; the bottom of the discharging opening is detachably connected with a conveying pipe, the other end of the conveying pipe is detachably connected with a feeding pipe, the other end of the feeding pipe is communicated to a ball mill, and the ball mill is located below the side of the feeding installation table. By optimizing the structures of the feeding bin body, the conveying pipe and the feeding pipe, the impact and abrasion of materials and grinding materials on the feeding structure and the ball mill can be effectively reduced, the maintenance frequency is greatly reduced, the maintenance amount is reduced, the maintenance time is shortened, the equipment failure rate and the shutdown maintenance time are reduced, the production operation rate is ensured, and cost reduction and efficiency improvement are realized.

Description

Technical Field

[0001] This utility model relates to the field of ball mill feeding technology, specifically to a ball mill combined feeding device. Background Technology

[0002] Existing ball mill feeding devices such as Figure 1 As shown, this is a "chute-type box body + feed pipe" structure. After the material and grinding media are put into the chute-type feed box 110, they slide quickly along the sloping bottom of the box body into the conveying chute 120, and continue to slide forward to be fed into the ball mill 140 through the feed pipe 130. In this structure, the bottom of the chute-type feed box 110 and the conveying chute 120 are both relatively steep slopes. After the material and grinding media enter, the impact and wear on their bottom surface and other parts are relatively large. Although a 50-80mm thick high manganese steel liner 111 is added to the severely worn bottom and an inspection port is provided, it needs to be replaced and maintained in time after a period of use. If maintenance is not timely, there will be material leakage problems. In addition, when the material and grinding media are fed into the ball mill 130 through the feed pipe 130, the landing point of the material and grinding media is on the feed bushing 131 of the ball mill 130, causing serious continuous wear to the feed bushing 131, which requires frequent replacement. These factors lead to increased maintenance frequency and costs for the structure, increased downtime, and impact on production operations. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a ball mill combined feeding device. By improving the existing ball mill feeding device, it reduces the impact and wear of materials and grinding media on the feeding structure and ball mill, thereby reducing equipment failure rate and downtime maintenance time.

[0004] The specific technical solution of this utility model is as follows: a ball mill combined feeding device, including a feeding platform and a material box installed on it. The material box includes a buffer chamber and a discharge chamber. The top of the buffer chamber has a feed inlet and its side wall has an overflow port. The discharge chamber is located on one side of the buffer chamber and is connected to the overflow port. The top of the discharge chamber is equipped with an abrasive hopper and its bottom has a discharge port. The bottom of the discharge port is detachably connected to a conveying pipe. The other end of the conveying pipe is detachably connected to a feeding pipe. The other end of the feeding pipe is connected to the ball mill. The ball mill is located below the side of the feeding platform.

[0005] Furthermore, preferably, the diameter of the bottom of the abrasive hopper is less than or equal to the diameter of the feed inlet.

[0006] Furthermore, preferably, the distance L from the overflow port to the bottom wall of the buffer chamber is ≥ 500mm, so that a slurry buffer layer of a certain height is formed inside the buffer chamber.

[0007] Furthermore, preferably, the conveying pipe is composed of multiple elbows connected by flanges.

[0008] Furthermore, preferably, the conveying pipe is composed of multiple 45° small elbows and a 90° large elbow flange connected together.

[0009] Furthermore, preferably, all the elbows are made of stamped elbows.

[0010] Furthermore, preferably, the inner wall of the conveying pipe is lined with a wear-resistant rubber layer.

[0011] Furthermore, preferably, one end of the feeding pipe that connects to the ball mill extends to the opening of the barrel.

[0012] Furthermore, preferably, a connecting plate is connected to the outer wall of the conveying pipe, and a supporting trolley is connected to the bottom of the connecting plate to support the conveying pipe.

[0013] Furthermore, preferably, a track is provided below the supporting trolley, and the supporting trolley can move horizontally along the track.

[0014] Furthermore, preferably, the supporting trolley includes a support frame, a body, and wheels. The support frame is installed on the top of the body and the top of the support frame is connected to the connecting plate. Wheels are installed on the bottom of the body and all wheels are attached to the track and can move horizontally along the track.

[0015] The beneficial effects of this utility model are as follows: By optimizing the structure of the feeding hopper, conveying pipe, and feeding pipe, this utility model can effectively reduce the impact and wear of materials and abrasives on the feeding structure and ball mill, significantly reduce maintenance frequency, reduce maintenance workload, shorten maintenance time, reduce equipment failure rate and downtime for maintenance, ensure production efficiency, and achieve cost reduction and efficiency improvement. Its specific technical benefits are as follows:

[0016] (1) The device feeds slurry and abrasive into two feed ports respectively, so that the two materials enter different chambers respectively, avoiding material blockage and impact wear on the inner wall of the chamber.

[0017] (2) When the improved buffer tank is fed with slurry, it can form a slurry buffer layer of a certain height between the bottom of the buffer tank and the overflow port, so that the material falling in later can achieve self-buffering, effectively release the velocity impact energy of the material, greatly reduce the scouring and wear of the tank, and then enter the conveying pipe in the overflow manner, which can also greatly reduce the wear of the material on the downstream channel.

[0018] (3) The improved conveying pipe is composed of multiple elbow flanges with wear-resistant rubber linings. It has a simple structure and is easy to replace. Its smooth inner wall can further reduce erosion and extend the service life of the conveying pipe.

[0019] (4) The extended feed pipe design allows the material to be directly fed into the ball mill cylinder, avoiding wear on the feed liner and extending the service life of the feed liner.

[0020] (5) The addition of the support trolley can not only support the conveying pipe and prevent it from deforming or breaking, but also allow the conveying pipe to be quickly removed during maintenance, which is convenient for maintenance operations. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of an existing ball mill feeding device;

[0022] Figure 2 This is a cross-sectional view of a ball mill combined feeding device according to the present invention;

[0023] Figure 3 for Figure 2 Main view of the 45° bend;

[0024] Figure 4 for Figure 2 Side view of a 45° bend;

[0025] Figure 5 for Figure 2 Front view of a 90° elbow;

[0026] Figure 6 for Figure 2 Side view of a 90° bend;

[0027] Figure 7 for Figure 1 Structural diagram of the material box;

[0028] In the diagram: 1-Feeding mounting platform; 2-Material box, 21-Buffer chamber, 211-Feed inlet, 22-Discharge chamber, 221-Discharge outlet, 23-Overflow outlet, 24-Abrasive hopper; 3-Conveying pipe, 31-Wear-resistant rubber, 32-Small elbow, 33-Large elbow, 34-Connecting plate; 4-Feeding pipe; 5-Ball mill, 51-Feed inlet, 52-Feeding bushing, 53-Barrel body, 531-Barrel body opening; 6-Support trolley, 61-Support frame, 62-Body body, 63-Wheel; 7-Railway; 110-Chutter-type feed box, 111-High manganese steel liner, 120-Conveying chute, 130-Feeding pipe, 140-Ball mill, 141-Feeding bushing. Detailed Implementation

[0029] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figure 2 As shown, this embodiment provides a ball mill combined feeding device, including a material box 2, a conveying pipe 3, a feeding pipe 4, and a ball mill 5; the material box 2 is installed on the loading platform 1, the ball mill 5 is located below the side of the loading platform 1, and the conveying pipe 3 and the feeding pipe 4 connect the material box 2 and the ball mill 5.

[0033] In this embodiment, the material box 2 includes a buffer chamber 21 and a discharge chamber 22. The upper end of the buffer chamber 21 is provided with a feed inlet 211 and an overflow outlet 23 is provided on its side wall. The discharge chamber 22 is located on one side of the buffer chamber 21 and is connected to the overflow outlet 23. The top of the discharge chamber 22 is equipped with an abrasive hopper 24 and the bottom is provided with a discharge outlet 221. The discharge outlet 221 is detachably connected to one end of the conveying pipe 3, and the other end of the conveying pipe 3 is detachably connected to one end of the feeding pipe 4. The other end of the feeding pipe 4 extends to the barrel opening 531 of the ball mill 5.

[0034] Preferably, the diameter of the bottom of the grinding hopper 24 is less than or equal to the diameter of the discharge port 221. After the grinding media enters the discharge bin 22 from the grinding hopper 24, it continues to fall in a straight line under its own gravity and enters the conveying pipe 3 directly from the discharge port 221. During this process, the diameter of the bottom of the grinding hopper 24 is less than or equal to the diameter of the discharge port 221, which ensures that the grinding media will not come into contact with the peripheral and bottom walls of the discharge bin 22 during the fall, thus preventing frictional loss, extending the service life of the discharge bin 22, and reducing the frequency of maintenance and replacement.

[0035] Specifically, such as Figure 7As shown, in this embodiment, the bottom diameter M of the abrasive hopper 24 is 300mm, the diameter N of the discharge port 221 is 325mm, the overflow port 23 is 500mm from the bottom wall of the buffer chamber 21, the top diameter O of the abrasive hopper 24 is 550mm, the top width P of the discharge chamber 22 is 700mm, the distance Q between the center of the discharge port 221 and the side wall of the discharge chamber 22 is 200mm, and the height R of the discharge chamber 22 is 400mm. The distance S between the top of the material outlet 221 and the bottom wall of the feeding bin 22 is 30mm. The distance T between the first flange connection and the top of the conveying pipe 3 is 130mm. The width U of the buffer bin 21 is 1000mm, the height V is 1400mm, the diameter W of the inlet 211 is 377mm, the height X of the base of the material box 2 is 100mm, and the distance Y between the outer side of the buffer bin 21 and the boundary of the loading platform 1 is 290mm.

[0036] In this embodiment, as Figure 3-6 As shown, the conveying pipe 3 consists of two 45° small elbows 32 connected by reverse flanges and one 90° large elbow 33 flange. The conveying pipe 3, formed by the small elbows 31 and large elbows 33 flanges, has a simple structure, low failure rate, and the flange connection method facilitates disassembly and replacement. The elbows have a certain curvature, achieving a smooth transition at the connection, which can prevent material from accumulating and clogging at corners or connections, ensuring smooth material passage. Of course, the number of large and small elbows constituting the conveying pipe 3 is not limited to that described in this embodiment; it can be reasonably set according to the distance between the material box 2 and the ball mill 5.

[0037] Specifically, both the small elbow 32 and the large elbow 33 are made of stamped elbows. Stamped elbows are processed using dies and stamping equipment, which has high production efficiency, is easy to operate, and is easy to mechanize and automate. The manufacturing cycle is short, the production cost is greatly reduced, and the material cutting is simple and the assembly and welding are convenient, making them very suitable for splicing into conveying pipes 3.

[0038] The selected dimensions for small elbow 32 and large elbow 33 are: seamless elbows with an inner diameter G of 426mm and a thickness H of 12mm. They are characterized by being hygienic and non-toxic, lightweight, heat-resistant, corrosion-resistant, impact-resistant, and having a long service life.

[0039] In addition, the flange connecting the small elbow 32 and the large elbow 33 is specifically selected as a DN400, 1.6MPa flange, the flange hole 34 diameter I is 30mm, and there are 16 holes evenly distributed around the circumference, the outer diameter J of the flange is 580mm, and the thickness K is 38mm.

[0040] Preferably, the inner wall of the conveying pipe 3 is lined with wear-resistant rubber 31, the thickness of which ranges from 10 to 20 mm. In this embodiment, the thickness F of the wear-resistant rubber 31 is determined to be 10 mm. The conveying pipe 3 uses wear-resistant, corrosion-resistant, and high-temperature-resistant rubber as its lining layer. The physical and chemical properties of the wear-resistant rubber 31 reduce the impact force of materials on the pipe wall during material transport. Furthermore, the buffering effect of the wear-resistant rubber 31 significantly extends the service life of the conveying pipe 3, reducing user costs.

[0041] Specifically, wear-resistant rubber 31 can be specifically defined as polyurethane rubber, which has the highest wear resistance, high strength and elasticity, and good aging resistance among various rubbers. It can buffer the speed of materials to the greatest extent and has a long service life, thus reducing the cost of use.

[0042] In this embodiment, the ball mill 5 also includes a feed bushing 52 and a barrel 53. The feed bushing 52 is circumferentially disposed inside the feed inlet 51. The end of the feed inlet 51 away from the feed pipe 4 is connected to the barrel 53. One end of the barrel 53 has a barrel opening 531 that communicates with the feed inlet 51. The feed bushing 52 extends directly to the barrel opening 531 and is flush with and communicates with the barrel opening 531. The feed bushing 52 can block some of the splashed slurry and abrasive from the feed pipe 4, guide the slurry and abrasive, and prevent the slurry and abrasive from directly contacting and rubbing against the inner wall of the feed inlet 51 and the barrel opening 531, thereby reducing the wear and tear on the ball mill body.

[0043] In this embodiment, the feeding pipe 4 extends into one end of the inlet 51 and extends to the barrel opening 531, allowing the material to directly enter the barrel 53 without contacting the feed bushing 52. Without extending the feeding pipe 4, the slurry and abrasive, after exiting the feeding pipe 4, need to first fall onto the feed bushing 52 and then enter the barrel 53 along the feed bushing 52. This long-term, frequent contact and friction between the slurry and abrasive and the feed bushing 52 causes wear on the feed bushing 52, requiring frequent replacement and increasing maintenance costs. Extending the feeding pipe 4 so that its outlet end reaches the barrel opening 531 allows the slurry and abrasive to directly enter the barrel 53 under their own inertia, avoiding contact and friction between the slurry and abrasive and the feed bushing 52, thus extending the service life of the feed bushing 52.

[0044] In another embodiment of this utility model, a support trolley 6 is also included. A connecting plate 34 is welded to the outer wall of the conveying pipe 3. The support trolley 6 includes a support frame 61, a body 62, and wheels 63. The support frame 61 is installed on the top of the body 62, and the top of the support frame 61 is screwed to the connecting plate 34 on the outer wall of the large elbow 33. Wheels 63 are installed at the bottom of the body 62, and the wheels 63 are all attached to the track 7 and can move horizontally along the track 7. When the feeding device is working normally, the small elbow 32 and the large elbow 33 of the conveying pipe 3 are flanged together. The support frame 61 of the support trolley 6 is bolted to the connecting plate 34 on the outer wall of the large elbow 33 to support it. When maintenance is required, after removing the flange bolts between the large elbow 33 and the small elbow 32, the wheels 63 drive the large elbow 33 to move along the track 7 away from the ball mill, so as to provide sufficient maintenance space and personnel movement passage, which facilitates maintenance of the ball mill inlet and the conveying pipe 3.

[0045] Of course, the dimensions of the devices involved in the above embodiments are not limited to those described, and can be adjusted according to usage needs.

[0046] like Figure 1 As shown, the maintenance time and cost of the existing ball mill feeding device are as follows: The feeding device needs to be maintained every two months, replacing the liner and repairing local wear areas. The maintenance time is 12-16 hours, and the maintenance cost is about 20,000 yuan. The feed liner has continuous wear, and the liner has a service life of about 5 years. Replacement requires a 48-hour shutdown, and the replacement cost is about 160,000 yuan. A major overhaul is required every six months, replacing the liner and feed box. The maintenance time is about 48 hours, and the maintenance cost is about 40,000 yuan. If maintenance is not timely, slurry may leak into the hollow shaft bearing seat at the feed end of the mill, contaminating the lubricating oil. An emergency shutdown is required to replace the lubricating oil, which takes 12 hours and costs about 25,000 yuan.

[0047] After optimizing the existing device, such as Figure 2 The ball mill combined feeding device shown has the following specific maintenance time and cost: Material box 2 is maintenance-free and can be used for a long time; the inner liner elbow has a simple structure and a service life of up to 3 years, requiring only annual inspection and maintenance of feed pipe 4, which can be completed within 2 hours at a cost of approximately 2,000 yuan; extending feed pipe 4 allows feed bushing 52 to be used permanently, increasing the overall overhaul cycle of the device to 3 years, with a major overhaul replacement completed within 8 hours at a cost of approximately 16,000 yuan. It is evident that maintenance costs and downtime are significantly reduced, resulting in a remarkable effect of cost reduction and efficiency improvement.

[0048] The working principle of the feeding device described in this utility model is as follows:

[0049] Slurry and abrasive media (steel balls or forged steel) are added to the material feed pipe 211 and the abrasive hopper 24 respectively, so that the two materials enter different hoppers, avoiding material congestion and impact wear on the inner wall of the hopper. The slurry enters the buffer hopper 21 after passing through the feed port. Since the slurry itself is a solid-liquid mixture, a buffer layer of a certain height is formed between the bottom of the buffer hopper 21 and the overflow port 23. The slurry falling in later is buffered by the presence of the buffer layer, releasing the velocity impact energy of the material and reducing the scouring and wear on the hopper. Then, it overflows into the discharge hopper 22 through the overflow port 23 on one side. The flow rate of the slurry is greatly reduced. At the same time, the abrasive media falls vertically from the abrasive hopper 24 and merges with the slurry. Together, they enter the conveying pipe 3 through the discharge port 221, flow along the conveying pipe 3 to the feeding pipe 4, and then flow directly into the barrel 53 from the extended feeding pipe 4, completing the feeding process.

[0050] During this process, the support trolley 6 at the bottom of the conveying pipe 3 is connected to the connecting plate 34 via the support frame 61, providing support for the conveying pipe 3 and preventing deformation or breakage of the conveying pipe 3 due to excessive slurry and abrasive. Additionally, during maintenance of the feeding device, the small elbows 31 and feeding pipe 4 connected to both ends of the large elbow 33 are removed, and the support trolley 6 is controlled to slide on the track 7. This allows the support trolley 6 to carry the large elbow 33 away from the ball mill 5, providing sufficient walking space and maintenance area for personnel.

[0051] This ball mill's combined feeding device utilizes the material's self-buffering to avoid wear on the buffer chamber, achieving maintenance-free operation. Furthermore, the material's overflow, buffered by the buffer chamber, effectively releases the impact energy of the material's velocity, significantly reducing wear on downstream channels. The elbow-type combined conveyor pipe with a wear-resistant rubber liner has a simple structure and is easy to replace (can be completed within 2 hours). Its smooth inner wall further reduces erosion, and the liner significantly extends the elbow's lifespan (up to 3 years or more). Additionally, the extended feed pipe allows material to be directly fed into the ball mill cylinder, avoiding wear on the feed liner and extending its service life.

[0052] Therefore, this feeding device can significantly reduce the frequency of maintenance, reduce the amount of maintenance, shorten the maintenance time, reduce the equipment failure rate and downtime maintenance time, ensure production efficiency, and achieve cost reduction and efficiency improvement.

[0053] The present invention has been described in detail above through specific and preferred embodiments. However, those skilled in the art should understand that the present invention is not limited to the embodiments described above. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ball mill combination feeder device, characterized by, Including the loading installation platform (1) and the material box (2) installed above it, the material box (2) includes a buffer bin (21) and a discharging bin (22), the buffer bin (21) is provided with a feeding port (211) at the top, and the side wall is provided with an overflow port (23), the discharging bin (22) is located on one side of the buffer bin (21) and is connected with the overflow port (23), the discharging bin (22) is provided with an abrasive hopper (24) at the top, and the bottom is provided with a discharging port (221); the bottom of the discharging port (221) is detachably connected with a conveying pipe (3), the other end of the conveying pipe (3) is detachably connected with a feeding pipe (4), the other end of the feeding pipe (4) is connected with a ball mill (5), and the ball mill (5) is located below the side of the loading installation platform (1).

2. A ball mill combination feeder device as claimed in claim 1, wherein, The distance L between the overflow port (23) and the bottom wall of the buffer bin (21) is greater than or equal to 500 mm.

3. A ball mill combination feeder as claimed in claim 1 wherein, The diameter of the bottom of the abrasive hopper (24) is less than or equal to the diameter of the discharging port (221).

4. A ball mill combination feeder device as claimed in claim 1, wherein, The conveying pipe (3) is composed of multiple elbows connected by flanges.

5. A ball mill combination feeder device as claimed in claim 4, wherein, The conveying pipe (3) is composed of multiple 45° small elbows (32) and a 90° large elbow (33) connected by flanges.

6. A ball mill combination feeder device according to claim 4 or 5, characterised in that, The elbow is a stamping elbow.

7. A ball mill combination feeder device according to any one of claims 1-5, characterized in that, The inner wall of the conveying pipe (3) is lined with a wear-resistant rubber layer (31).

8. A ball mill combination feeder device according to any one of claims 1-5, characterized in that, The end of the feeding pipe (4) connected with the ball mill (5) extends to the barrel port (531).

9. A ball mill combination feeder device as claimed in claim 6, wherein, The conveying pipe (3) is connected with a connecting plate (34), and the bottom of the connecting plate (34) is connected with a supporting trolley (6), which supports the conveying pipe (3).

10. A ball mill combination feeder device as claimed in claim 9, wherein, The supporting trolley (6) is provided below the track (7), and the supporting trolley (6) can move horizontally along the track (7).

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