A cement raw material selecting device with multi-stage screening

Abstract

The present invention discloses a multi-stage screening cement raw meal selecting equipment, which relates to the technical field of cement raw meal separation, and includes a feeding assembly, an air separation assembly, a sand powder separation unit, a cyclone collector, a first bracket, a second bracket, and a setting plate. The setting plate is fixedly connected to the ground. The feeding assembly is connected to the air separation assembly. One side of the air separation assembly away from the feeding assembly is connected to the sand powder separation unit. One side of the sand powder separation unit away from the air separation assembly is connected to the cyclone collector. The feeding assembly, the first bracket, the second bracket, and the setting plate are fixedly connected. One side of the first bracket away from the setting plate is fixedly connected to the air separation assembly. One side of the second bracket away from the setting plate is fixedly connected to the sand powder separation unit and the cyclone collector. The present invention controls the input of cement raw meal, greatly improving the input uniformity and providing stable conditions for the normal operation of the air separation assembly.

Description

Technical Field

[0001] The invention relates to the technical field of cement raw material separation, in particular to cement raw material separation equipment with multi-stage screening. Background Art

[0002] Cement raw powder screening equipment is a device used to screen and grade cement raw materials. It can screen the original cement clinker or ore, and separate the coarse powder and fine powder for the next step of processing and production. Cement raw powder screening equipment is usually composed of a vibrating screen and an air classifier. However, the existing cement raw material selection equipment has many defects and cannot meet the use requirements.

[0003] Screening of cement raw powder is usually carried out by elevator for conveying sand and gravel. However, in the long-term working process, the falling impact of sand and gravel will greatly reduce the service life of the elevator bucket. On the other hand, some sand and gravel will remain in the process of the elevator bucket outputting sand and gravel, and the existing structure has no effective solution to this problem.

[0004] The composition of cement raw materials varies, so during the material transportation process, uneven input is likely to occur, which will affect the stability of the subsequent air separation process. On the other hand, during the air separation of sand and gravel, the sand and gravel themselves are prone to blocking each other, which will result in some small particles of sand and gravel being unable to be successfully air-separated, greatly reducing the effectiveness of the powder selection equipment. Summary of the invention

[0005] The object of the present invention is to provide a cement raw material selection device with multi-stage screening to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-stage screening cement raw material powder selection equipment, comprising a feeding component, an air selection component, a sand powder separation unit, a cyclone collector, a first bracket, a second bracket, and a setting plate, wherein the setting plate is firmly connected to the ground, the feeding component is connected to the air selection component, the side of the air selection component away from the feeding component is connected to the sand powder separation unit, the side of the sand powder separation unit away from the air selection component is connected to the cyclone collector, the feeding component, the first bracket, the second bracket and the setting plate are firmly connected, the side of the first bracket away from the setting plate is firmly connected to the air selection component, and the side of the second bracket away from the setting plate is firmly connected to the sand powder separation unit and the cyclone collector. The feeding component transports the cement raw material to the air selection component, and the cement raw material after air selection is divided into three categories of coarse, medium and fine sand according to size, and is output separately, and a conveyor belt can be set under each sand and gravel output port to transport the sorted sand and gravel. The fine sand is transported to the sand-powder separation unit, the fine sand and dust are separated, and the dust is collected by a cyclone collector. The cyclone collector belongs to conventional technical means in this field, and the specific structure is not described.

[0007] Furthermore, the feeding assembly includes a feeding box, a feeding inlet, a lifting unit, and a recovery hopper. The feeding box is fixedly connected to the setting plate. The feeding inlet is arranged at the bottom side of the side of the feeding box and is fixedly connected to the feeding box. The lifting unit is arranged inside the feeding box and is connected to the two side walls of the feeding box. The recovery hopper is arranged at the bottom side inside the feeding box, and the side of the recovery hopper is communicated with an external recovery pipeline. The raw cement material enters the feeding box from the feeding inlet, and the lifting unit conveys the raw cement material in a distributed manner. The raw cement material is conveyed towards the air separation assembly side. The raw cement material leaking during the conveying process is collected and discharged by the recovery hopper for secondary utilization.

[0008] Furthermore, the lifting unit includes a circulating lifting belt, a driving wheel, lifting buckets, synchronous wheels, and lifting plates. The two sides of the circulating lifting belt are connected to the side walls of the feeding box. An installation gap is arranged at the middle position of the circulating lifting belt. The driving wheel is fixedly connected to the driving wheel of the circulating lifting belt. The synchronous wheel is rotatably connected to the side bracket of the circulating lifting belt. The driving wheel is driven by a synchronous belt to be connected to the synchronous wheel. Multiple groups of sliding grooves are arranged on the belt surface of the circulating lifting belt, and the lifting buckets are slidably connected to the sliding grooves. Multiple groups of lifting buckets are arranged, and the multiple groups of lifting buckets are evenly distributed along the belt surface of the circulating lifting belt. The lifting plates are fixedly connected to the synchronous wheels, and multiple groups of lifting plates are arranged. The multiple groups of lifting plates are evenly distributed around the synchronous wheels. The circulating lifting belt drives the lifting buckets to operate, and the conveyed raw cement material falls into each lifting bucket and is conveyed by the lifting buckets towards the air separation assembly. The driving wheel rotates together with the circulating lifting belt and drives the synchronous wheel to rotate through the synchronous belt.

[0009] Furthermore, a lifting groove is provided inside the lifting bucket. An elevator plate and a return spring are arranged inside the lifting groove. One end of the lifting bucket close to the inner side of the circulating lifting belt is fixedly connected with a telescopic rod. The telescopic rod communicates with the lifting groove. The elevator plate is slidably connected with the lifting groove. One end of the return spring is fixedly connected with the elevator plate, and the other end of the return spring is fixedly connected with the bottom side of the inner wall of the lifting groove. During the feeding process of the lifting bucket, when the raw cement material received by the lifting bucket is sufficient, the elevator plate will compress the return spring due to gravity, and the gas inside the lifting groove will be pressed into the telescopic rod, and the telescopic rod will extend. When the synchronous pulley rotates, it will drive the lifting plate to rotate together. If the telescopic rod extends greatly, the telescopic rod will contact the rotating lifting plate, and the lifting plate will drive the telescopic rod to move upward, and the lifting bucket will move upward along the lifting groove in advance, avoiding excessive raw cement material from falling into the lifting bucket. The feeding component of the present invention is provided with a return spring under the elevator plate, which alleviates the impact force of the material falling, and reduces the damage of the raw cement material to the lifting bucket. The gravity of the raw cement material controls the internal space of the lifting groove to control the extension amount of the telescopic rod. The lifting plate will drive the telescopic rod to move upward, and the lifting bucket will move upward along the lifting groove in advance. This setting realizes the control of the input of the raw cement material without adding an electric control screening mechanism and an additional power source, greatly improving the input uniformity and providing stable conditions for the normal operation of the air separation component. On the other hand, the setting of the lifting groove causes the lifting bucket to drop when discharging materials. After the dropped lifting bucket is stopped by the bottom edge of the lifting groove, the stuck materials inside the lifting bucket will be shaken out, which greatly improves the feeding smoothness.

[0010] Furthermore, the air separation component includes a blower, a rough selection bin, an aggregation bin, a first output pipe, a second output pipe, and a connecting pipe. The rough selection bin, the blower, and the feeding box are fixedly connected. The rough selection bin communicates with the feeding box. The air outlet of the blower communicates with the rough selection bin. One end of the rough selection bin away from the feeding box is connected to the aggregation bin. The first output pipe is connected to the bottom of the rough selection bin. The second output pipe is connected to the bottom of the aggregation bin. One end of the connecting pipe is connected to the top of the rough selection bin, and the other end of the connecting pipe communicates with the sand powder separation unit. The blower inputs air flow into the rough selection bin, and the air flow screens the raw cement material. The coarse sand drops the fastest and is discharged from the first output pipe. The medium sand is guided by the aggregation bin and discharged from the second output pipe. The fine sand is input into the sand powder separation unit from the connecting pipe.

[0011] Further, a gas distribution plate, a guiding plate, a converging plate, and a processing unit are arranged inside the rough selection bin. The gas distribution plate is fixedly connected to the rough selection bin. The processing unit is arranged above the gas distribution plate. The blower is communicated with the gas distribution plate. The guiding plate and the converging plate are fixedly connected to the side wall of the rough selection bin. The guiding plate and the converging plate are arranged below the processing unit. There are multiple groups of guiding plates and converging plates, and the multiple groups of guiding plates and converging plates are evenly distributed along the lower end of the side wall of the rough selection bin. The guiding plate is inclined downward, and the converging plate is inclined upward. The gas distribution plate is provided with a first group of array holes and a second group of array holes. The first group of array holes faces the communicating pipe, and the second group of array holes faces the converging plate. When the sand and gravel enter the inside of the rough selection bin, they first pass through the processing unit. After being output from the processing unit, air flow is input at the first group of array holes for preliminary screening. The fine sand is input into the communicating pipe, and the coarse sand and medium sand continue to fall to the guiding plate. The output air flow of the second group of array holes is set to be greater than the output air flow velocity of the first group of array holes. Under the action of the air flow of the second group of array holes, the medium sand will move upward along the converging plate, and the medium sand enters the converging bin.

[0012] Further, the processing unit includes a transition frame, an impact plate, a stretching film, a folding sleeve, a back-pushing net, and a pneumatic rod. The transition frame is fixedly connected to the side wall of the rough selection bin. The impact plate is slidably connected to the inner wall of the transition frame. The folding sleeve is arranged below the impact plate. One end of the folding sleeve is fixedly connected to the impact plate, and the other end of the folding sleeve is fixedly connected to the bottom of the inner wall of the transition frame. The stretching film is arranged on both sides of the impact plate. One end of the stretching film is fixedly connected to the impact plate, and the other end of the stretching film is fixedly connected to the bottom side of the inner wall of the transition frame. One end of the pneumatic rod is fixedly connected to the upper side of the inner wall of the transition frame, and the other end of the pneumatic rod is fixedly connected to the back-pushing net. When the sand and gravel enter the transition frame, the folding sleeve and the pneumatic rod will be alternately inflated. The folding sleeve is inflated to push up the impact plate. Both sides of the impact plate pull up the stretching film. The stretching film blocks the sand and gravel from leaking to the bottom of the stretching film. The impact plate throws up the sand and gravel, and the back-pushing net then presses down the sand and gravel. The impact plate and the sand and gravel rotate rapidly. During the process of the sand and gravel being thrown up, the back-pushing net disperses the sand and gravel. The aperture of the back-pushing net is set such that only fine sand can pass through. During the downward movement of the back-pushing net, the medium sand and the coarse sand are pushed back, and the throwing height is reduced. The processing unit of the present invention performs rapid vibration on the input sand and gravel. The impact plate and the back-pushing net move alternately, causing the sand and gravel to be continuously thrown up and dropped. During this process, the adhered sand and gravel are separated. Due to the small particle size and low density of the fine sand, it will gradually float to the upper layer of the sand and gravel. Concentrating the fine sand to the upper layer of the sand and gravel can greatly reduce the situation where the fine sand cannot be separated due to the mutual blockage of the sand and gravel during the air separation process, and greatly improve the overall powder selection accuracy of the equipment.

[0013] Further, the sand and powder separation unit includes a power bin, a vertical sleeve, an outer conical sleeve, a separation conical sleeve, a third output pipe, a connecting column, and a cage rotor. The outer conical sleeve is fixedly connected to the setting plate. The bottom of the outer conical sleeve is fixedly connected to the third output pipe. The upper part of the outer conical sleeve is fixedly connected to the vertical sleeve. The power bin is fixedly connected to one end of the vertical sleeve away from the outer conical sleeve. One end of the connecting column is fixedly connected to the output shaft of the power bin, and the other end of the connecting column is fixedly connected to the separation conical sleeve. The separation conical sleeve is arranged inside the outer conical sleeve. The cage rotor is fixedly connected to the connecting column and is arranged inside the vertical sleeve. The air separation assembly is communicated with the outer conical sleeve, and the internal space of the vertical sleeve is communicated with the cyclone collector. The power bin is a conventional technical means in the art, and its specific structure will not be described. Fine sand and dust enter the inside of the outer conical sleeve. The separation conical sleeve and the cage rotor rotate driven by the power bin. The fine sand will fall along the outer conical sleeve due to its larger density, while the dust is sucked upward and sent into the cyclone collector for further treatment.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By arranging a return spring under the lifting plate in the feeding assembly of the present invention, the impact force of the material falling is alleviated, and the damage to the lifting bucket caused by the cement raw material is reduced. The gravity of the cement raw material controls the internal space of the lifting groove to control the extension amount of the telescopic rod. The lifting plate will drive the telescopic rod to move upward, and the lifting bucket will move upward along the lifting groove in advance. This setting realizes the control of the input of the cement raw material without adding an electric control screening mechanism and an additional power source, greatly improving the input uniformity and providing stable conditions for the normal operation of the air separation assembly. On the other hand, the setting of the lifting groove causes the lifting bucket to drop when outputting materials. After dropping, the lifting bucket is stopped by the bottom edge of the lifting groove, and the stuck materials inside the lifting bucket will be shaken out. This setting greatly improves the feeding smoothness. The processing unit of the present invention vibrates the input sand and gravel rapidly. The impact plate and the push-back net move alternately, causing the sand and gravel to be continuously thrown up and dropped. During this process, the adhered sand and gravel are separated. The fine sand, due to its small particle size and small density, will gradually float on the upper layer of the sand and gravel. Concentrating the fine sand on the upper layer of the sand and gravel can greatly reduce the situation where the fine sand cannot be separated due to the mutual blockage of the sand and gravel during the air separation process, and greatly improve the overall powder selection accuracy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0016] Figure 1 is the overall structural schematic diagram of the present invention;

[0017] Figure 2 is the structural schematic diagram of the lifting unit of the present invention;

[0018] Figure 3 is a schematic internal structure diagram of the lifting unit of the present invention;

[0019] Figure 4 is Figure 3 a partial enlarged view of location A of

[0020] Figure 5 is a schematic internal structure diagram of the rough selection bin of the present invention;

[0021] Figure 6 is a schematic internal structure diagram of the processing unit of the present invention;

[0022] Figure 7 is a partial cross-sectional view of the sand and powder separation unit of the present invention;

[0023] Figure 8 is a three-dimensional view of the cage-shaped rotor structure of the present invention;

[0024] In the figure: 1 - feeding assembly, 11 - feeding box, 12 - feeding port, 13 - lifting unit, 131 - circulating lifting belt, 132 - lifting bucket, 1321 - lifting plate, 1322 - return spring, 1323 - telescopic rod, 133 - synchronous pulley, 134 - lifting plate, 14 - recovery hopper, 2 - air separation assembly, 21 - blower, 22 - rough selection bin, 221 - air distribution plate, 222 - guiding plate, 223 - gathering plate, 224 - processing unit, 2241 - transition frame, 2242 - impact plate, 2243 - stretching film, 2244 - folding sleeve, 2245 - push-back net, 2246 - pneumatic rod, 23 - gathering bin, 24 - first output pipe, 25 - second output pipe, 26 - connecting pipe, 3 - sand and powder separation unit, 31 - power bin, 32 - vertical sleeve, 33 - outer conical sleeve, 34 - separation conical sleeve, 35 - third output pipe, 36 - connecting column, 37 - cage-shaped rotor, 4 - cyclone collector, 5 - first support, 6 - second support, 7 - setting plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As Figure 1As shown in the figure, a cement raw material separating equipment with multi-stage screening includes a feeding component 1, an air separation component 2, a sand and powder separation unit 3, a cyclone collector 4, a first support 5, a second support 6, and a setting plate 7. The setting plate 7 is fixedly connected to the ground. The feeding component 1 is connected to the air separation component 2. One side of the air separation component 2 away from the feeding component 1 is connected to the sand and powder separation unit 3. One side of the sand and powder separation unit 3 away from the air separation component 2 is connected to the cyclone collector 4. The feeding component 1, the first support 5, the second support 6, and the setting plate 7 are fixedly connected. One side of the first support 5 away from the setting plate 7 is fixedly connected to the air separation component 2. One side of the second support 6 away from the setting plate 7 is fixedly connected to the sand and powder separation unit 3 and the cyclone collector 4. The feeding component 1 conveys the cement raw material to the air separation component 2. After air separation, the cement raw material is classified into three categories: coarse sand, medium sand, and fine sand according to size and output respectively. A conveyor belt can be arranged below each sand output port to convey the sorted sand and gravel. The fine sand is conveyed into the sand and powder separation unit 3, where the fine sand and dust are separated, and the dust is collected by the cyclone collector 4. The cyclone collector 4 belongs to the conventional technical means in this field, and its specific structure will not be described.

[0027] As Figure 2 , Figure 3 shown in the figure, the feeding component 1 includes a feeding box 11, a feeding port 12, a lifting unit 13, and a recovery hopper 14. The feeding box 11 is fixedly connected to the setting plate 7. The feeding port 12 is arranged at the bottom side of the side of the feeding box 11 and is fixedly connected to the feeding box 11. The lifting unit 13 is arranged inside the feeding box 11 and is connected to both side walls of the feeding box 11. The recovery hopper 14 is arranged at the bottom side inside the feeding box 11, and the side of the recovery hopper 14 is communicated with an external recovery pipeline. The cement raw material enters the feeding box 11 from the feeding port 12, and the lifting unit 13 conveys the cement raw material in a distributed manner and conveys it to the side of the air separation component 2. The cement raw material leaking during the conveying process is collected and discharged by the recovery hopper 14 for secondary utilization.

[0028] As Figure 2 , Figure 3As shown in the figure, the lifting unit 13 includes a circulating lifting belt 131, a driving wheel, a lifting bucket 132, a synchronous wheel 133, and a lifting plate 134. Both sides of the circulating lifting belt 131 are connected to the side wall of the feeding box 11. An installation gap is provided at the middle position of the circulating lifting belt 131. The driving wheel is fixedly connected to the driving wheel of the circulating lifting belt 131. The synchronous wheel 133 is rotatably connected to the side bracket of the circulating lifting belt 131. The driving wheel is driven by a synchronous belt and the synchronous wheel 133. Multiple groups of sliding grooves are provided on the belt surface of the circulating lifting belt 131. The lifting bucket 132 is slidably connected to the sliding groove. Multiple groups of lifting buckets 132 are provided, and the multiple groups of lifting buckets 132 are evenly distributed along the belt surface of the circulating lifting belt 131. The lifting plate 134 is fixedly connected to the synchronous wheel 133. Multiple groups of lifting plates 134 are provided, and the multiple groups of lifting plates 134 are evenly distributed around the synchronous wheel 133. The circulating lifting belt 131 drives the lifting bucket 132 to operate. The conveyed raw cement falls into each lifting bucket 132 and is conveyed by the lifting bucket 132 to the air separation assembly 2. The driving wheel rotates together with the circulating lifting belt 131 and drives the synchronous wheel 133 to rotate through the synchronous belt.

[0029] As Figure 4As shown in the figure, a lifting groove is provided inside the lifting bucket 132. Inside the lifting groove, there are a lifting plate 1321 and a return spring 1322. One end of the lifting bucket 132 close to the inner side of the circulating lifting belt 131 is fixedly connected to a telescopic rod 1323. The telescopic rod 1323 communicates with the lifting groove. The lifting plate 1321 is slidably connected to the lifting groove. One end of the return spring 1322 is fixedly connected to the lifting plate 1321, and the other end of the return spring 1322 is fixedly connected to the bottom side of the inner wall of the lifting groove. During the feeding process of the lifting bucket 132, when the amount of raw cement received by the lifting bucket 132 is sufficient, the lifting plate 1321 will compress the return spring 1322 due to gravity, and the gas inside the lifting groove will be pressed into the telescopic rod 1323, and the telescopic rod 1323 will extend. When the synchronous wheel 133 rotates, it will drive the lifting plate to rotate together. If the telescopic rod 1323 extends significantly, the telescopic rod 1323 will contact the rotating lifting plate 134, and the lifting plate 134 will drive the telescopic rod 1323 to move upward, and the lifting bucket 132 will move upward along the lifting groove in advance, avoiding too much raw cement from falling into the lifting bucket 134. By arranging the return spring 1322 below the lifting plate 1321 in the feeding component 1 of the present invention, the impact force of the material falling is alleviated, and the damage of the raw cement to the lifting bucket 132 is reduced. The gravity of the raw cement controls the internal space of the lifting groove to control the extension amount of the telescopic rod 1323. The lifting plate 134 will drive the telescopic rod 1323 to move upward, and the lifting bucket will move upward along the lifting groove in advance. This setting realizes the control of the input of raw cement without adding an electric control screening mechanism and an additional power source, greatly improving the input uniformity and providing stable conditions for the normal operation of the air separation component 2. On the other hand, the setting of the lifting groove causes the lifting bucket to drop when outputting materials. After dropping, the lifting bucket is stopped by the bottom edge of the lifting groove, and the stuck materials inside the lifting bucket 132 will be shaken out. This setting greatly improves the feeding smoothness.

[0030] As Figure 1 , Figure 5 shown, the air separation component 2 includes a blower 21, a rough selection bin 22, an aggregation bin 23, a first output pipe 24, a second output pipe 25, and a connecting pipe 26. The rough selection bin 22, the blower 21, and the feeding box 11 are fixedly connected. The rough selection bin 22 communicates with the feeding box 11. The air outlet of the blower 21 communicates with the rough selection bin 22. One end of the rough selection bin 22 away from the feeding box 11 is connected to the aggregation bin 23. The first output pipe 24 is connected to the bottom of the rough selection bin 22. The second output pipe 25 is connected to the bottom of the aggregation bin 23. One end of the connecting pipe 26 is connected to the top of the rough selection bin 22, and the other end of the connecting pipe 26 communicates with the sand and powder separation unit 3. The blower 21 inputs air flow into the rough selection bin 22, and the air flow screens the raw cement. The coarse sand drops the fastest and is discharged from the first output pipe 24. The medium sand is guided by the aggregation bin 23 and discharged from the second output pipe 25. The fine sand is input into the sand and powder separation unit 3 from the connecting pipe 26.

[0031] As Figure 5 shown, a gas distribution plate 221, a guiding plate 222, a converging plate 223, and a processing unit 224 are arranged inside the rough selection bin 22. The gas distribution plate 221 is fixedly connected to the rough selection bin 22. The processing unit 224 is arranged above the gas distribution plate 221. The blower 21 is communicated with the gas distribution plate 221. The guiding plate 222 and the converging plate 223 are fixedly connected to the side wall of the rough selection bin 22. The guiding plate 222 and the converging plate 223 are arranged below the processing unit 224. There are multiple groups of the guiding plate 222 and the converging plate 223. The multiple groups of the guiding plate 222 and the converging plate 223 are evenly distributed along the lower end of the side wall of the rough selection bin 22. The guiding plate 222 is inclined downward, and the converging plate 223 is inclined upward. The gas distribution plate 221 is provided with a first group of array holes and a second group of array holes. The first group of array holes faces the connecting pipe 26, and the second group of array holes faces the converging plate 223. The sand and gravel enter the inside of the rough selection bin 22, first pass through the processing unit 224, and after being output from the processing unit 224, air flow is input at the first group of array holes for preliminary screening. The fine sand is input into the connecting pipe 26. The coarse sand and medium sand continue to fall to the guiding plate 222. The output air flow of the second group of array holes is set to be greater than the output air flow velocity of the first group of array holes. Under the action of the air flow of the second group of array holes, the medium sand will move upward along the converging plate 223, and the medium sand enters the converging bin 23.

[0032] As Figure 6As shown, the processing unit 224 includes a transition frame 2241, an impact plate 2242, a stretching film 2243, a folding sleeve 2244, a back-pushing net 2245, and a pneumatic rod 2246. The transition frame 2241 is fixedly connected to the side wall of the rough selection bin 22. The impact plate 2242 is slidably connected to the inner wall of the transition frame 2241. The folding sleeve 2244 is arranged below the impact plate 2242. One end of the folding sleeve 2244 is fixedly connected to the impact plate 2242, and the other end of the folding sleeve 2244 is fixedly connected to the bottom of the inner wall of the transition frame 2241. The stretching film 2243 is arranged on both sides of the impact plate 2242. One end of the stretching film 2243 is fixedly connected to the impact plate 2242, and the other end of the stretching film 2243 is fixedly connected to the bottom side of the inner wall of the transition frame 2241. One end of the pneumatic rod 2246 is fixedly connected to the upper side of the inner wall of the transition frame 2241, and the other end of the pneumatic rod 2246 is fixedly connected to the back-pushing net 2245. When the sand and gravel enter the transition frame 2241, the folding sleeve 2244 and the pneumatic rod 2246 will be alternately inflated. The folding sleeve 2244 is inflated to lift the impact plate. The two sides of the impact plate 2242 lift the stretching film 2243. The stretching film 2243 blocks the sand and gravel from leaking to the bottom of the stretching film 2243. The impact plate 2242 throws the sand and gravel up, and then the back-pushing net 2245 presses the sand and gravel down. The impact plate 2242 and the sand and gravel rotate rapidly. During the process of the sand and gravel being thrown up, the back-pushing net 2245 disperses the sand and gravel. The aperture of the back-pushing net 2245 is set so that only fine sand can pass through. During the downward movement of the back-pushing net 2245, medium sand and coarse sand are pushed back, and the throwing height is reduced. The processing unit 224 of the present invention vibrates the input sand and gravel rapidly. The impact plate 2242 and the back-pushing net 2245 move alternately, so that the sand and gravel are continuously thrown up and dropped. During this process, the adhered sand and gravel are separated. Due to the small particle size and low density of the fine sand, it will gradually float to the upper layer of the sand and gravel. Concentrating the fine sand on the upper layer of the sand and gravel can greatly reduce the situation that the fine sand cannot be separated due to the mutual blockage of the sand and gravel during the air separation process, and greatly improve the overall powder selection accuracy of the equipment.

[0033] As Figure 7 , Figure 8As shown, the sand and powder separation unit 3 includes a power bin 31, a vertical sleeve 32, an outer conical sleeve 33, a separation conical sleeve 34, a third output pipe 35, a connecting column 36, and a cage rotor 37. The outer conical sleeve 33 is fixedly connected to the setting plate 7. The bottom of the outer conical sleeve 33 is fixedly connected to the third output pipe 35. The upper part of the outer conical sleeve 33 is fixedly connected to the vertical sleeve 32. The power bin 31 is fixedly connected to one end of the vertical sleeve 32 away from the outer conical sleeve 33. One end of the connecting column 36 is fixedly connected to the output shaft of the power bin 31, and the other end of the connecting column 36 is fixedly connected to the separation conical sleeve 34. The separation conical sleeve 34 is arranged inside the outer conical sleeve 33. The cage rotor 37 is fixedly connected to the connecting column 36, and the cage rotor 37 is arranged inside the vertical sleeve 32. The air separation assembly 2 is communicated with the outer conical sleeve 33, and the internal space of the vertical sleeve 32 is communicated with the cyclone collector 4. The power bin 31 belongs to the conventional technical means in the art, and its specific structure will not be described. Fine sand and dust enter the inside of the outer conical sleeve 33. The separation conical sleeve 34 and the cage rotor 37 rotate under the drive of the power bin 31. The fine sand will fall along the outer conical sleeve 33 due to its larger density, while the dust is sucked upward and sent into the cyclone collector 4 for further treatment.

[0034] The working principle of the present invention: Cement raw materials enter the feeding box 11 from the feeding port 12. The lifting unit 13 distributes and conveys the cement raw materials. The sand and gravel enter the inside of the rough selection bin 22. First, they pass through the treatment unit 224. When the sand and gravel enter the transition frame 2241, the folding sleeve 2244 and the pneumatic rod 2246 will alternately inflate. When the folding sleeve 2244 inflates, it will push up the impact plate. Both sides of the impact plate 2242 will pull up the stretching film 2243. The stretching film 2243 blocks the sand and gravel from leaking to the bottom of the stretching film 2243. The impact plate 2242 throws up the sand and gravel, and the back-pushing net 2245 then presses down the sand and gravel. After being output from the treatment unit 224, air flow is input at the first group of array holes for preliminary screening. The fine sand is input into the connecting pipe 26. The coarse sand and medium sand continue to fall to the guiding plate 222. The output air flow of the second group of array holes is set to be greater than the output air flow velocity of the first group of array holes. Under the action of the air flow of the second group of array holes, the medium sand will move up along the gathering plate 223, and the medium sand enters the gathering bin 23. The fine sand and dust enter the inside of the outer conical sleeve 33. The separation conical sleeve 34 and the cage rotor 37 rotate under the drive of the power bin 31. The fine sand will fall along the outer conical sleeve 33 due to its larger density, while the dust is sucked upward and sent into the cyclone collector 4, and the cyclone collector 4 collects and discharges the dust.

[0035] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-stage screening cement raw material selecting equipment, characterized in that: The selecting equipment includes a feeding component (1), an air separation component (2), a sand and powder separation unit (3), a cyclone collector (4), a first support (5), a second support (6), and a setting plate (7). The setting plate (7) is fixedly connected to the ground. The feeding component (1) is connected to the air separation component (2). One side of the air separation component (2) away from the feeding component (1) is connected to the sand and powder separation unit (3). One side of the sand and powder separation unit (3) away from the air separation component (2) is connected to the cyclone collector (4). The feeding component (1), the first support (5), the second support (6), and the setting plate (7) are fixedly connected. One side of the first support (5) away from the setting plate (7) is fixedly connected to the air separation component (2). One side of the second support (6) away from the setting plate (7) is fixedly connected to the sand and powder separation unit (3) and the cyclone collector (4); The feeding component (1) includes a feeding box (11), a feeding port (12), a lifting unit (13), and a recovery hopper (14). The feeding box (11) is fixedly connected to the setting plate (7). The feeding port (12) is arranged at the bottom side of the side of the feeding box (11). The feeding port (12) is fixedly connected to the feeding box (11). The lifting unit (13) is arranged inside the feeding box (11). The lifting unit (13) is connected to the two side walls of the feeding box (11). The recovery hopper (14) is arranged at the bottom side inside the feeding box (11). The side of the recovery hopper (14) is communicated with an external recovery pipeline; The lifting unit (13) includes a circulating lifting belt (131), a driving wheel, a lifting bucket (132), a synchronous wheel (133), and a lifting plate (134). Both sides of the circulating lifting belt (131) are connected to the side walls of the feeding box (11). An installation gap is arranged at the middle position of the circulating lifting belt (131). The driving wheel is fixedly connected to the driving wheel of the circulating lifting belt (131). The synchronous wheel (133) is rotatably connected to the side bracket of the circulating lifting belt (131). The driving wheel is driven by a synchronous belt and the synchronous wheel (133). Multiple groups of chutes are arranged on the belt surface of the circulating lifting belt (131). The lifting bucket (132) is slidably connected to the chute. Multiple groups of lifting buckets (132) are arranged. Multiple groups of lifting buckets (132) are evenly distributed along the belt surface of the circulating lifting belt (131). The lifting plate (134) is fixedly connected to the synchronous wheel (133). Multiple groups of lifting plates (134) are arranged. Multiple groups of lifting plates (134) are evenly distributed around the synchronous wheel (133); The lifting bucket (132) is internally provided with a lifting groove, and a lifting plate (1321) and a return spring (1322) are arranged inside the lifting groove. One end of the lifting bucket (132) close to the inner side of the circulating lifting belt (131) is fixedly connected with a telescopic rod (1323). The telescopic rod (1323) communicates with the lifting groove. The lifting plate (1321) is slidably connected with the lifting groove. One end of the return spring (1322) is fixedly connected with the lifting plate (1321), and the other end of the return spring (1322) is fixedly connected with the bottom side of the inner wall of the lifting groove.

2. A multi-stage screening cement raw meal powder selection device according to claim 1, characterized in that: The air separation assembly (2) includes a blower (21), a rough selection bin (22), an aggregation bin (23), a first output pipe (24), a second output pipe (25), and a connecting pipe (26). The rough selection bin (22), the blower (21) and the feeding box (11) are fixedly connected. The rough selection bin (22) communicates with the feeding box (11). The air outlet of the blower (21) communicates with the rough selection bin (22). One end of the rough selection bin (22) away from the feeding box (11) is connected to the aggregation bin (23). The first output pipe (24) is connected to the bottom of the rough selection bin (22). The second output pipe (25) is connected to the bottom of the aggregation bin (23). One end of the connecting pipe (26) is connected to the top of the rough selection bin (22), and the other end of the connecting pipe (26) communicates with the sand powder separation unit (3).

3. A multi-stage screening cement raw meal powder selection device according to claim 2, characterized in that: The rough selection bin (22) is internally provided with a gas distribution plate (221), a guiding plate (222), an aggregation plate (223), and a processing unit (224). The gas distribution plate (221) is fixedly connected with the rough selection bin (22). The processing unit (224) is arranged above the gas distribution plate (221). The blower (21) communicates with the gas distribution plate (221). The guiding plate (222) and the aggregation plate (223) are fixedly connected with the side wall of the rough selection bin (22). The guiding plate (222) and the aggregation plate (223) are arranged below the processing unit (224). There are multiple groups of the guiding plate (222) and the aggregation plate (223). Multiple groups of the guiding plate (222) and the aggregation plate (223) are evenly distributed along the lower end of the side wall of the rough selection bin (22). The guiding plate (222) inclines downward, and the aggregation plate (223) inclines upward. The gas distribution plate (221) is provided with a first group of array holes and a second group of array holes. The first group of array holes faces the connecting pipe (26), and the second group of array holes faces the aggregation plate (223).

4. A multi-stage screening cement raw meal powder selection device according to claim 3, characterized in that: The processing unit (224) includes a transition frame (2241), an impact plate (2242), a stretching film (2243), a folding sleeve (2244), a push-back net (2245), and a pneumatic rod (2246). The transition frame (2241) is fixedly connected to the side wall of the rough selection bin (22). The impact plate (2242) is slidably connected to the inner wall of the transition frame (2241). The folding sleeve (2244) is arranged below the impact plate (2242). One end of the folding sleeve (2244) is fixedly connected to the impact plate (2242), and the other end of the folding sleeve (2244) is fixedly connected to the bottom of the inner wall of the transition frame (2241). The stretching film (2243) is arranged on both sides of the impact plate (2242). One end of the stretching film (2243) is fixedly connected to the impact plate (2242), and the other end of the stretching film (2243) is fixedly connected to the bottom side of the inner wall of the transition frame (2241). One end of the pneumatic rod (2246) is fixedly connected to the upper side of the inner wall of the transition frame (2241), and the other end of the pneumatic rod (2246) is fixedly connected to the push-back net (2245).

5. A multi-stage screening cement raw meal powder selection device according to claim 4, characterized in that: The sand powder separation unit (3) includes a power bin (31), a vertical sleeve (32), an outer conical sleeve (33), a separation conical sleeve (34), a third output pipe (35), a connecting column (36), and a cage-shaped rotor (37). The outer conical sleeve (33) is fixedly connected to the setting plate (7). The bottom of the outer conical sleeve (33) is fixedly connected to the third output pipe (35). The upper part of the outer conical sleeve (33) is fixedly connected to the vertical sleeve (32). The power bin (31) is fixedly connected to one end of the vertical sleeve (32) away from the outer conical sleeve (33). One end of the connecting column (36) is fixedly connected to the output shaft of the power bin (31), and the other end of the connecting column (36) is fixedly connected to the separation conical sleeve (34). The separation conical sleeve (34) is arranged inside the outer conical sleeve (33). The cage-shaped rotor (37) is fixedly connected to the connecting column (36). The cage-shaped rotor (37) is arranged inside the vertical sleeve (32). The air separation assembly (2) is communicated with the outer conical sleeve (33), and the inner space of the vertical sleeve (32) is communicated with the cyclone collector (4).

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