A drum sifter and a sifting method

Abstract

The present application belongs to the technical field of ore screening equipment, and particularly relates to a drum screening machine and a screening method, which comprises a machine body, a screening mechanism rotatably installed on the top of the machine body and used for multi-stage screening of materials, the screening mechanism comprising an arc-shaped screen plate, a flushing mechanism arranged in the screening mechanism and used for flushing of the materials, the flushing mechanism comprising a first rotating water spraying pipe, a second rotating water spraying pipe and a third rotating water spraying pipe, and a driving mechanism arranged outside the screening mechanism and used for driving the screening mechanism and the flushing mechanism. The present application can perform multi-stage screening of ores in the materials through the screening mechanism, can also perform local and rapid replacement of the arc-shaped screen plate, and can clean and remove the mud balls and other impurities clogging the screen holes on the screening mechanism through the flushing mechanism by recycling water, so as to improve the screening efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of ore screening equipment, specifically relating to a drum screen and screening method. Background Technology

[0002] A drum screen is a device used to clean and separate mud and impurities from ores, and is widely used in the mineral processing and beneficiation industries. The drum of the drum screen is supported by four rollers. A motor drives the drum to rotate at low speed via large and small gears. Ores containing mud clumps enter the rotating drum as material, and water spray pipes wash the material. Smaller particles of ore pass through the screen plates, thus achieving ore washing and screening.

[0003] Existing rotary drum screens typically only screen ore once, which is inefficient for subsequent ore processing. The screening efficiency is insufficient, and the screen plates, subjected to continuous erosion and friction from the material, may require frequent replacement. Since the screen plates are usually mounted on the drum with multiple screws, each replacement requires disassembling and reassembling these screws, consuming significant time. If worn screen plates are not replaced promptly, screening efficiency will be directly affected. Worn screen holes may deform or enlarge, making it difficult to effectively distinguish materials of different sizes, thus reducing screening efficiency. Furthermore, the water spray position is usually fixed, often resulting in material accumulation between the water spray pipe and the screen plate. During use, the screen plate is prone to clogging with clumps of mud, which cannot be effectively cleaned by the water spray pipe, leading to insufficient screening efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a drum screen and a screening method that can perform multi-stage screening of ore in materials through a screening mechanism, can quickly replace the arc-shaped screen plate locally, and can use a flushing mechanism to circulate water to clean and remove impurities such as mud clumps clogging the screen holes on the screening mechanism, thereby improving screening efficiency.

[0005] The specific technical solution adopted by this invention is as follows:

[0006] A drum screening machine, comprising:

[0007] Organism;

[0008] A screening mechanism, rotatably mounted on the top of the machine body, is used for multi-stage screening of materials, and the screening mechanism includes an arc-shaped screen plate;

[0009] A rinsing mechanism is provided in the screening mechanism for rinsing materials. The rinsing mechanism includes a first rotating water spray pipe, a second rotating water spray pipe and a third rotating water spray pipe.

[0010] A drive mechanism is provided outside the screening mechanism and is used to drive the screening mechanism and the rinsing mechanism.

[0011] When the drive mechanism is working, it drives the screening mechanism to rotate in one direction and also drives the rinsing mechanism to rotate in another direction, so that the screening mechanism screens materials while the rinsing mechanism rinses the screening mechanism.

[0012] In a preferred embodiment of the drum screening machine of the present invention, the driving mechanism includes a motor fixedly connected to the machine body, a main shaft fixedly connected to the output end of the motor, a first gear fixedly connected to the end of the main shaft near the screening mechanism, and a first pulley fixedly connected to the end of the main shaft near the rinsing mechanism.

[0013] In a preferred embodiment of the drum screening machine of the present invention, the screening mechanism includes a first cylindrical screen rotatably connected to the top of the machine body, and a second cylindrical screen and a third cylindrical screen are fixedly connected to the inside of the first cylindrical screen from the outside to the inside.

[0014] In a preferred embodiment of the drum screening machine of the present invention, the third drum screen includes a frame fixedly connected to the second drum screen and the first drum screen. A plurality of limiting strips are slidably connected inside the frame. The limiting strips are distributed along the circumference of the frame, and a screen plate assembly is slidably connected between adjacent limiting strips.

[0015] In a preferred embodiment of the drum screening machine of the present invention, the screen plate assembly includes a plurality of arc-shaped screen plates distributed along the sliding direction of the limiting strips, and the two ends of the plurality of arc-shaped screen plates are respectively slidably connected to the adjacent limiting strips.

[0016] In a preferred embodiment of the drum screening machine of the present invention, a plurality of limiting sliding columns are fixedly connected to the bottom of the limiting strip, both ends of the arc-shaped screen plate are slidably engaged with the limiting sliding columns, the number of limiting sliding columns is equal to the number of arc-shaped screen plates, and the distance between adjacent limiting sliding columns is equal to the length of the arc-shaped screen plate along the sliding direction of the limiting strip.

[0017] In a preferred embodiment of the drum screen according to the present invention, the rinsing mechanism includes a water collection tank disposed inside the machine body, the water collection tank being located below the screening mechanism. A water pump is fixedly connected to the machine body, the input end of the water pump being connected to the bottom of the water collection tank. A water cavity is provided on one side of the screening mechanism, the water cavity being rotatably connected to the machine body. One end of the water cavity is connected to the output end of the water pump. A second pulley is fixedly connected to the water cavity, the second pulley being drively connected to the first pulley. A fixed spray pipe is rotatably connected to the other end of the water cavity, the end of the fixed spray pipe away from the water cavity being fixedly connected to the machine body. A connecting pipe is fixedly connected to the water cavity. The first rotating spray pipe, the second rotating spray pipe, and the third rotating spray pipe are sequentially fixedly connected to the connecting pipe from the inside to the outside. The first rotating spray pipe is located inside the third cylindrical screen, the second rotating spray pipe is located between the third cylindrical screen and the second cylindrical screen, and the third rotating spray pipe is located between the second cylindrical screen and the first cylindrical screen.

[0018] In a preferred embodiment of the drum screening machine of the present invention, a first connecting pipe is connected between the water collection tank and the input end of the water pump, and a second connecting pipe is provided between the output end of the water pump and the water chamber, wherein the second connecting pipe and the water chamber are rotatably connected.

[0019] In a preferred embodiment of the drum screening machine of the present invention, a filter screen is fixedly connected inside the water collection tank, and the filter screen is located above the connection between the water collection tank and the first connecting pipe.

[0020] The screening method of the drum screener is applicable to the drum screener described above. The specific screening method is as follows:

[0021] S1: First, the material is placed into the water chamber. After the motor starts working, it drives the screening mechanism and the rinsing mechanism to operate.

[0022] S2: After the screening mechanism is activated, it rotates on the machine body. Through centrifugal force, it moves the smaller particles of ore from the inside of the third cylindrical screen to the interlayer between the third and second cylindrical screens, and moves the even smaller particles of ore from the interlayer between the third and second cylindrical screens to the interlayer between the second and first cylindrical screens, so as to achieve multi-stage screening of the ore in the material.

[0023] S3: After the rinsing mechanism is activated, water is sprayed onto the material in the third cylindrical screen through the fixed water spray pipe to clean it. This allows impurities such as mud lumps in the material to pass through the third, second, and first cylindrical screens in sequence and flow into the water collection tank. After the water pump is activated, the water in the water collection tank is moved into the water chamber. The water chamber sprays water onto the material through the fixed water spray pipe. The water chamber also sprays water onto the third, second, and first cylindrical screens through the first, second, and third rotating water spray pipes, respectively, to achieve water recycling and thus realize the washing and screening of the material.

[0024] The technical effects achieved by this invention are as follows:

[0025] This invention employs a screening mechanism design that enables multi-stage screening of ore in materials and allows for rapid local replacement of the arc-shaped screen plates. The third, second, and first cylindrical screens, arranged sequentially from the inside out, each have progressively smaller screen apertures to facilitate multi-stage ore screening. By sliding a limiting strip, the limiting slide column disengages from the arc-shaped screen plate at a suitable position, allowing for the disassembly of the arc-shaped screen plate and facilitating rapid replacement. Compared to the traditional method of screw-connected arc-shaped screen plates, this design improves screening efficiency.

[0026] This invention employs a rinsing mechanism that recycles water to clean and remove clogging impurities such as mud from the screen holes of the third, second, and first cylindrical screens. A water collection tank collects water leaking from the screening mechanism and filters out clogging impurities such as mud. After the water pump operates, the water in the collection tank is moved to the water chamber and sprayed out through a fixed spray pipe, a first rotating spray pipe, a second rotating spray pipe, and a third rotating spray pipe. After the drive mechanism operates, it drives the water chamber to rotate. The water chamber drives the first, second, and third rotating spray pipes to rotate through a connecting pipe, respectively cleaning clogging impurities such as mud from the third, second, and first cylindrical screens. Compared with traditional methods that do not clean the screen holes, this improves screening efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a structural schematic diagram of the entire invention from another angle;

[0029] Figure 3 In this invention Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a schematic diagram of the screening mechanism and rinsing mechanism in this invention;

[0031] Figure 5This is an exploded view of the screening mechanism in this invention;

[0032] Figure 6 This is a schematic diagram of the structure of the third cylindrical sieve in this invention;

[0033] Figure 7 In this invention Figure 6 Enlarged view of point B in the middle;

[0034] Figure 8 This is a schematic diagram of the arc-shaped sieve plate and the limiting sliding column in this invention;

[0035] Figure 9 This is a schematic diagram of the structure for disassembling the first arc-shaped sieve plate in this invention;

[0036] Figure 10 This is a schematic diagram of the structure for disassembling the second arc-shaped sieve plate in this invention;

[0037] Figure 11 This is a schematic diagram of the structure for disassembling the third arc-shaped sieve plate in this invention;

[0038] Figure 12 This is a schematic diagram of the rinsing mechanism in this invention;

[0039] Figure 13 This is a schematic diagram of the drive mechanism in this invention.

[0040] The attached diagram lists the components represented by each number as follows:

[0041] 10. Body; 11. Support plate; 12. Support column;

[0042] 20. Screening mechanism; 21. First cylindrical screen; 22. Second cylindrical screen; 23. Third cylindrical screen; 231. Frame; 232. Limiting strip; 233. Screen plate assembly; 234. Arc-shaped screen plate; 235. Limiting slide column;

[0043] 30. Flushing mechanism; 31. Water collection tank; 311. Filter screen; 32. Water pump; 321. First connecting pipe; 322. Second connecting pipe; 33. Water chamber; 34. Second pulley; 35. Fixed spray pipe; 36. Connecting pipe; 37. First rotating spray pipe; 38. Second rotating spray pipe; 39. Third rotating spray pipe;

[0044] 40. Drive mechanism; 41. Motor; 42. Main shaft; 421. First gear; 422. First pulley; 43. Transmission belt. Detailed Implementation

[0045] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0046] Example 1

[0047] like Figures 1 to 12 As shown, this is the first embodiment of the present invention. This embodiment provides a drum screen and a screening method, including a machine body 10; a screening mechanism 20, which is rotatably mounted on the top of the machine body 10 for multi-stage screening of materials, and includes an arc-shaped screen plate 234; a rinsing mechanism 30, which is disposed in the screening mechanism 20 for rinsing materials, and includes a first rotating water spray pipe 37, a second rotating water spray pipe 38, and a third rotating water spray pipe 39; and a driving mechanism 40, which is disposed outside the screening mechanism 20 for driving the screening mechanism 20 and the rinsing mechanism 30.

[0048] It should be noted that four rollers are provided between the screening mechanism 20 and the machine body 10 to support the screening mechanism 20. These rollers are existing technology and will not be described in detail here.

[0049] In use, the material is placed into the screening mechanism 20. After the driving mechanism 40 works, it drives the screening mechanism 20 and the washing mechanism 30 to operate. When the screening mechanism 20 operates, it causes the material to tumble, allowing smaller particles of ore to pass through the arc-shaped screen plate 234, thereby achieving multi-stage screening of ore and improving screening efficiency. When the washing mechanism 30 operates, the first rotating water spray pipe 37, the second rotating water spray pipe 38, and the third rotating water spray pipe 39 rotate in the screening mechanism 20 and clean the mud and other impurities that clog the screening mechanism 20, thereby achieving ore washing and improving screening efficiency.

[0050] Example 2

[0051] Reference Figures 1 to 13 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0052] like Figure 13 As shown, the drive mechanism 40 includes a motor 41 fixedly connected to the body 10, a main shaft 42 fixedly connected to the output end of the motor 41, a first gear 421 fixedly connected to one end of the main shaft 42 near the screening mechanism 20, and a first pulley 422 fixedly connected to one end of the main shaft 42 near the rinsing mechanism 30.

[0053] According to the above structure, after the motor 41 is working, the output end drives the main shaft 42 to rotate, and the main shaft 42 drives the first gear 421 and the first pulley 422 to rotate, which facilitates the driving of the screening mechanism 20 and the washing mechanism 30.

[0054] like Figure 4 and Figure 5 As shown, the screening mechanism 20 includes a first cylindrical screen 21 rotatably connected to the top of the machine body 10, and a second cylindrical screen 22 and a third cylindrical screen 23 are fixedly connected to the inside of the first cylindrical screen 21 from the outside to the inside.

[0055] It should be noted that the third cylindrical sieve 23, the second cylindrical sieve 22 and the first cylindrical sieve 21 are all provided with sieve holes inside, and the hole diameter size decreases in sequence. The first cylindrical sieve 21 is provided with a second gear on the outside, and the second gear meshes with the first gear 421.

[0056] According to the above structure, the material is placed into the third cylindrical screen 23. After the motor 41 starts working, the output end drives the main shaft 42 to rotate. The main shaft 42 drives the first cylindrical screen 21 to rotate through the second gear. The first cylindrical screen 21 drives the second cylindrical screen 22 and the third cylindrical screen 23 to rotate, causing the material in the third cylindrical screen 23 to tumble. The smaller particles of ore in the material fall between the third cylindrical screen 23 and the second cylindrical screen 22. The even smaller particles of ore then fall between the second cylindrical screen 22 and the first cylindrical screen 21, thereby realizing multi-stage screening of the ore in the material.

[0057] like Figure 5 , Figure 6 and Figure 7 As shown, the third cylindrical screen 23 includes a frame 231 that is fixedly connected to the second cylindrical screen 22 and the first cylindrical screen 21. Several limiting strips 232 are slidably connected inside the frame 231. The limiting strips 232 are distributed around the frame 231. A screen plate assembly 233 is slidably connected between adjacent limiting strips 232.

[0058] It should be noted that one end of the frame 231 has an opening for the limit strip 232 to enter and exit, and the other end of the frame 231 has a baffle to prevent the limit strip 232 from continuing to move away from the opening, thereby reducing the possibility of the limit strip 232 separating from the frame 231.

[0059] like Figures 7 to 11 As shown, the sieve plate assembly 233 includes a plurality of arc-shaped sieve plates 234 distributed along the sliding direction of the limiting strip 232, and the two ends of the plurality of arc-shaped sieve plates 234 are respectively slidably connected to the adjacent limiting strip 232.

[0060] It should be noted that there are three arc-shaped sieve plates 234.

[0061] like Figures 7 to 11As shown, several limiting sliding posts 235 are fixedly connected to the bottom of the limiting strip 232. Both ends of the arc-shaped screen plate 234 are slidably engaged with the limiting sliding posts 235. The number of limiting sliding posts 235 is equal to the number of arc-shaped screen plates 234. The distance between adjacent limiting sliding posts 235 is equal to the length of the arc-shaped screen plate 234 along the sliding direction of the limiting strip 232.

[0062] It should be noted that there are three limiting slide columns 235. The cross-sectional shape of the limiting slide column 235 is circular. Both ends of the arc screen plate 234 are provided with arc grooves that penetrate the arc screen plate 234. The arc grooves slide in cooperation with the limiting slide columns 235. In the initial state, the arc screen plate 234 is installed properly. At this time, the three arc screen plates 234 correspond one-to-one with the three limiting slide columns 235.

[0063] According to the above structure, when it is necessary to replace the arc-shaped screen plate 234 at a specified position, that is, to partially replace the arc-shaped screen plate 234, the limiting strip 232 is moved outward along the frame 231. The limiting strip 232 drives the limiting slide column 235 to move along the arc slide groove, so that the limiting slide column 235 at the appropriate position and its corresponding arc-shaped screen plate 234 are disengaged. At this time, the limitation on the arc-shaped screen plate 234 is released, thereby removing the arc-shaped screen plate 234 corresponding to the limiting slide column 235 at the appropriate position, realizing partial replacement. This process does not require disassembling screws. Compared with the traditional method, it improves the convenience of replacement and facilitates the quick replacement of the worn arc-shaped screen plate 234, thereby improving screening efficiency.

[0064] Furthermore, each end of the arc-shaped screen plate 234 has a limiting strip 232, so that two limiting strips 232 limit the arc-shaped screen plate 234. When the limiting strip 232 is moved, one end of the limiting strip 232 can be moved first, so that the limiting strip 232 is disengaged from the arc-shaped screen plate 234. At this time, the limiting strip 232 at the other end still limits the arc-shaped screen plate 234, preventing the arc-shaped screen plate 234 from falling suddenly and improving the reliability of disassembling and assembling the arc-shaped screen plate 234.

[0065] like Figure 12As shown, the rinsing mechanism 30 includes a water collection tank 31 disposed inside the machine body 10, located below the screening mechanism 20. A water pump 32 is fixedly connected to the machine body 10, and the input end of the water pump 32 is connected to the bottom of the water collection tank 31. A water chamber 33 is provided on one side of the screening mechanism 20, and the water chamber 33 is rotatably connected to the machine body 10. One end of the water chamber 33 is connected to the output end of the water pump 32. A second pulley 34 is fixedly connected to the water chamber 33, and the second pulley 34 is drivenly connected to the first pulley 422. The other end of the water chamber 33 is rotatably connected to... A fixed water spray pipe 35 is provided, with one end of the fixed water spray pipe 35 away from the water chamber 33 being fixedly connected to the machine body 10. A connecting pipe 36 is fixedly connected to the water chamber 33. A first rotating water spray pipe 37, a second rotating water spray pipe 38, and a third rotating water spray pipe 39 are fixedly connected to the connecting pipe 36 from the inside to the outside. The first rotating water spray pipe 37 is located inside the third cylindrical screen 23, the second rotating water spray pipe 38 is located between the third cylindrical screen 23 and the second cylindrical screen 22, and the third rotating water spray pipe 39 is located between the second cylindrical screen 22 and the first cylindrical screen 21.

[0066] It should be noted that a support plate 11 is provided between the water cavity 33 and the body 10. The water cavity 33 is rotatably connected to the body 10 through the support plate 11. A support column 12 is provided between the end of the fixed water spray pipe 35 away from the water cavity 33 and the body 10. The fixed water spray pipe 35 is fixedly connected to the body 10 through the support column 12. The shape of the water collection tank 31 is similar to that of a funnel, and the size of the upper end is larger than that of the lower end, which facilitates the downward flow of water to collect water. A transmission belt 43 is connected between the second pulley 34 and the first pulley 422.

[0067] According to the above structure, after the water leaking from the screening mechanism 20 falls into the water collection tank 31, the second connecting pipe 322 moves the water in the water collection tank 31 to the water chamber 33 after it starts working. Then, the water in the water chamber 33 moves to the fixed spray pipe 35, the first rotating spray pipe 37, the second rotating spray pipe 38, and the third rotating spray pipe 39. Since the motor 41 drives the first pulley 422 to rotate through the main shaft 42 after it starts working, the first pulley 422 drives the second pulley 422 through the transmission belt 43. The second pulley 34 rotates, and through the water chamber 33 and connecting pipe 36, it drives the first rotating water spray pipe 37, the second rotating water spray pipe 38, and the third rotating water spray pipe 39 to rotate in the screening mechanism 20. This causes the first rotating water spray pipe 37, the second rotating water spray pipe 38, and the third rotating water spray pipe 39 to spray water to clean the third cylindrical screen 23, the second cylindrical screen 22, and the first cylindrical screen 21, respectively. The water then falls into the water collection tank 31 to achieve water recycling. After the shaft 42 rotates, it drives the first gear 421 and the first pulley 422 to rotate in the same direction. Since the first pulley 422 causes the first rotating water spray pipe 37, the second rotating water spray pipe 38 and the third rotating water spray pipe 39 to rotate in the forward direction through the transmission belt 43, while the first gear 421 meshes with the second gear set outside the first cylindrical screen 21, the screening mechanism 20 rotates in the reverse direction. This makes the rotation direction of the first rotating water spray pipe 37, the second rotating water spray pipe 38 and the third rotating water spray pipe 39 opposite to the rotation direction of the screening mechanism 20. This facilitates the first rotating water spray pipe 37, the second rotating water spray pipe 38 and the third rotating water spray pipe 39 to spray water to clean the third cylindrical screen 23, the second cylindrical screen 22 and the first cylindrical screen 21 respectively. When the first rotating water spray pipe 37 rotates to coincide with the fixed water spray pipe 35, the water spraying effect of the first rotating water spray pipe 37 coincides and superimposes with the water spraying effect of the fixed water spray pipe 35, thereby improving the washing effect.

[0068] like Figure 12 As shown, a first connecting pipe 321 is connected between the water collection tank 31 and the input end of the water pump 32, and a second connecting pipe 322 is provided between the output end of the water pump 32 and the water cavity 33. The second connecting pipe 322 and the water cavity 33 are rotatably connected.

[0069] According to the above structure, the second connecting pipe 322 is rotatably connected to the water cavity 33, which makes it easier to reduce the situation where the second connecting pipe 322 is twisted by the water cavity 33 during the rotation of the water cavity 33.

[0070] like Figure 12 As shown, a filter screen 311 is fixedly connected inside the water collection tank 31, and the filter screen 311 is located above the connection between the water collection tank 31 and the first connecting pipe 321.

[0071] According to the above structure, when the water collection tank 31 collects water, the filter screen 311 blocks the mud and other impurities in the water above the filter screen 311, so that the filtered water moves to the water pump 32 through the first connecting pipe 321 below the filter screen 311, reducing the possibility of mud and other impurities damaging the water pump 32 during the water recycling process.

[0072] To enable those skilled in the art to further understand the drum screen of the present invention, the present invention also provides a screening method for the drum screen, which is applicable to the above-mentioned drum screen. The specific screening method is as follows:

[0073] S1: First, the material is placed into the water chamber 33. After the motor 41 starts working, it drives the screening mechanism 20 and the rinsing mechanism 30 to operate.

[0074] S2: After the screening mechanism 20 is activated, it rotates on the machine body 10. Through centrifugal force, it moves the smaller particles of ore from the inside of the third cylindrical screen 23 to the interlayer between the third cylindrical screen 23 and the second cylindrical screen 22, and moves the even smaller particles of ore from the interlayer between the third cylindrical screen 23 and the second cylindrical screen 22 to the interlayer between the second cylindrical screen 22 and the first cylindrical screen 21, so as to realize multi-stage screening of ore in the material;

[0075] S3: After the rinsing mechanism 30 is activated, it sprays water to clean the material in the third cylindrical screen 23 through the fixed water spray pipe 35, so that the mud and other impurities in the material pass through the third cylindrical screen 23, the second cylindrical screen 22 and the first cylindrical screen 21 in sequence and flow into the water collection tank 31. After the water pump 32 is working, it moves the water in the water collection tank 31 to the water chamber 33. The water chamber 33 sprays water to clean the material through the fixed water spray pipe 35. The water chamber 33 also sprays water to clean the third cylindrical screen 23, the second cylindrical screen 22 and the first cylindrical screen 21 through the first rotating water spray pipe 37, the second rotating water spray pipe 38 and the third rotating water spray pipe 39 respectively, so as to realize the recycling of water and thus realize the washing and screening of materials.

[0076] The working principle of this invention is as follows: After the drive mechanism 40 operates, it drives the screening mechanism 20 and the washing mechanism 30 to operate, placing the ore material mixed with impurities such as mud into the third cylindrical screen 23. After the third cylindrical screen 23 rotates, the material tumbles and leaks out sequentially into the second cylindrical screen 22 and the first cylindrical screen 21 according to different particle sizes, realizing multi-stage screening. Among them, the arc-shaped screen plate 234 can be quickly disassembled and assembled locally, which facilitates the quick replacement of the arc-shaped screen plate 234 and improves the screening efficiency. After the washing mechanism 30 operates, it cleans the impurities such as mud in the screen holes of the third cylindrical screen 23, the second cylindrical screen 22 and the first cylindrical screen 21, reducing the situation where impurities blockage leads to insufficient screening efficiency, thereby improving the screening efficiency.

[0077] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A drum screening machine, characterized in that, include: Body (10); Screening mechanism (20), which is rotatably mounted on the top of the machine body (10) for multi-stage screening of materials, the screening mechanism (20) includes an arc-shaped screen plate (234). The rinsing mechanism (30) is disposed in the screening mechanism (20) and is used to rinse the material. The rinsing mechanism (30) includes a first rotating water spray pipe (37), a second rotating water spray pipe (38) and a third rotating water spray pipe (39). A drive mechanism (40) is provided outside the screening mechanism (20) and is used to drive the screening mechanism (20) and the rinsing mechanism (30). When the drive mechanism (40) works, it drives the screening mechanism (20) to rotate in one direction and also drives the rinsing mechanism (30) to rotate in another direction, so that the screening mechanism (20) screens materials while the rinsing mechanism (30) rinses the screening mechanism (20). When the rinsing mechanism (30) is activated, the first rotating water spray pipe (37), the second rotating water spray pipe (38) and the third rotating water spray pipe (39) rotate in the screening mechanism (20) and clean the impurities that are blocked on the screening mechanism (20); The drive mechanism (40) includes a motor (41) fixedly connected to the body (10), the output end of the motor (41) is fixedly connected to a main shaft (42), the end of the main shaft (42) near the screening mechanism (20) is fixedly connected to a first gear (421), and the end of the main shaft (42) near the rinsing mechanism (30) is fixedly connected to a first pulley (422). The screening mechanism (20) includes a first cylindrical screen (21) rotatably connected to the top of the machine body (10), and a second cylindrical screen (22) and a third cylindrical screen (23) are fixedly connected from the outside to the inside of the first cylindrical screen (21). The rinsing mechanism (30) includes a water collection tank (31) disposed inside the machine body (10), the water collection tank (31) being located below the screening mechanism (20), a water pump (32) being fixedly connected to the machine body (10), the input end of the water pump (32) being connected to the bottom of the water collection tank (31), a water cavity (33) being provided on one side of the screening mechanism (20), the water cavity (33) being rotatably connected to the machine body (10), one end of the water cavity (33) being connected to the output end of the water pump (32), a second pulley (34) being fixedly connected to the water cavity (33), the second pulley (34) being drively connected to the first pulley (422), and the other end of the water cavity (33) being connected to the first pulley (422). A fixed water spray pipe (35) is rotatably connected. The end of the fixed water spray pipe (35) away from the water chamber (33) is fixedly connected to the machine body (10). A connecting pipe (36) is fixedly connected to the water chamber (33). The first rotating water spray pipe (37), the second rotating water spray pipe (38), and the third rotating water spray pipe (39) are fixedly connected to the connecting pipe (36) from the inside to the outside. The first rotating water spray pipe (37) is located inside the third cylindrical screen (23). The second rotating water spray pipe (38) is located between the third cylindrical screen (23) and the second cylindrical screen (22). The third rotating water spray pipe (39) is located between the second cylindrical screen (22) and the first cylindrical screen (21). A first connecting pipe (321) is connected between the water collection tank (31) and the input end of the water pump (32), and a second connecting pipe (322) is provided between the output end of the water pump (32) and the water cavity (33). The second connecting pipe (322) and the water cavity (33) are rotatably connected. A filter screen (311) is fixedly connected inside the water collection tank (31), and the filter screen (311) is located above the connection between the water collection tank (31) and the first connecting pipe (321).

2. The drum screen according to claim 1, characterized in that: The third cylindrical screen (23) includes a frame (231) fixedly connected to the second cylindrical screen (22) and the first cylindrical screen (21). A plurality of limiting strips (232) are slidably connected inside the frame (231). The limiting strips (232) are distributed circumferentially along the frame (231), and a screen plate assembly (233) is slidably connected between adjacent limiting strips (232).

3. The drum screen according to claim 2, characterized in that: The sieve plate assembly (233) includes a plurality of arc-shaped sieve plates (234) distributed along the sliding direction of the limiting strip (232), and the two ends of the plurality of arc-shaped sieve plates (234) are respectively slidably connected to the adjacent limiting strip (232).

4. The drum screen according to claim 3, characterized in that: The bottom of the limiting strip (232) is fixedly connected with several limiting sliding columns (235). Both ends of the arc-shaped screen plate (234) are slidably engaged with the limiting sliding columns (235). The number of limiting sliding columns (235) is equal to the number of arc-shaped screen plates (234). The distance between adjacent limiting sliding columns (235) is equal to the length of the arc-shaped screen plate (234) along the sliding direction of the limiting strip (232).

5. A screening method for a drum screener, characterized in that: This method is applicable to the drum screen as described in any one of claims 1-4, and the specific screening method is as follows: S1: First, place the material into the water chamber (33). After the motor (41) starts working, it drives the screening mechanism (20) and the rinsing mechanism (30) to operate. S2: After the screening mechanism (20) is activated, it rotates on the machine body (10). Through centrifugal force, it moves the smaller particles of ore from the inside of the third cylindrical screen (23) to the interlayer between the third cylindrical screen (23) and the second cylindrical screen (22), and moves the smaller particles of ore from the interlayer between the third cylindrical screen (23) and the second cylindrical screen (22) to the interlayer between the second cylindrical screen (22) and the first cylindrical screen (21), so as to realize multi-stage screening of ore in the material; S3: After the flushing mechanism (30) is activated, the material in the third cylindrical screen (23) is sprayed with water through the fixed spray pipe (35) to clean it. This allows the mud and impurities in the material to pass through the third cylindrical screen (23), the second cylindrical screen (22) and the first cylindrical screen (21) in sequence and flow into the water collection tank (31). After the water pump (32) is activated, the water in the water collection tank (31) is moved to the water chamber (33). The water chamber (33) sprays water to clean the material through the fixed spray pipe (35). The water chamber (33) also sprays water to clean the third cylindrical screen (23), the second cylindrical screen (22) and the first cylindrical screen (21) through the first rotating spray pipe (37), the second rotating spray pipe (38) and the third rotating spray pipe (39) respectively, so as to realize the recycling of water and thus realize the washing and screening of the material.

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