Pretreatment screening device for magnesium oxide production and screening method thereof

Abstract

The invention discloses a magnesium oxide production screening device capable of being pretreated and a screening method of the magnesium oxide production screening device, and relates to the technical field of magnesium oxide processing.The magnesium oxide production screening device comprises an airflow screening mechanism and a negative pressure fan installed on one side of the interior of the airflow screening mechanism, and a crushing mechanism is arranged on one side of the top of the airflow screening mechanism; an opening and closing support is arranged at the top of the crushing mechanism, the airflow screening mechanism comprises a screening support, a rotating bearing is rotationally connected to one side of the interior of the screening support, a discharging opening is fixedly formed in the bottom of the screening support, and a conveying pipe is fixedly installed on the side, close to the rotating bearing, of the screening support; the negative pressure fan is matched with the spiral conveying blade to generate vortex, the first screening barrel and the second screening barrel are used for screening magnesium oxide, and the mesh holes of the first screening barrel and the second screening barrel are staggered, so that the sizes of the mesh holes of the first screening barrel and the second screening barrel are changed; impurities with different particle sizes and uncrushed magnesium oxide can be screened.

Description

Technical Field

[0001] The invention relates to the technical field of magnesium oxide processing, in particular to a screening device for pre-treated magnesium oxide production and a screening method thereof. Background Art

[0002] Magnesium oxide is an inorganic compound with the chemical formula MgO. It is magnesium oxide and an ionic compound. It is a white solid at room temperature. Magnesium oxide exists in nature in the form of periclase and is the raw material for magnesium smelting. In some magnesium oxide production processes, screening devices are used to screen and remove impurities. During the production process, impurities such as iron filings are easily left in the material, affecting the purity of the magnesium oxide. In addition, there are powders of different particle sizes in the magnesium oxide after production and crushing, so graded screening is required.

[0003] Publication No. CN 117123499 A discloses a screening device for removing impurities in magnesium oxide production, wherein the impurity removal device comprises an impurity removal conveyor belt, a feed opening and a miscellaneous material box, wherein the feed opening is arranged above one side of the impurity removal conveyor belt, and the miscellaneous material box is arranged at the bottom of the impurity removal conveyor belt. The multi-stage screening device comprises a screening shell, a screening mesh plate, a bottom plate, a connecting spring and a vibration shaft, wherein the screening shell is connected to the impurity removal conveyor belt, the screening shell is arranged obliquely, the connecting spring is arranged at the bottom of the screening shell, the connecting spring is arranged on the bottom plate, the screening mesh plate is arranged in the screening shell, the vibration shaft is rotatably arranged in the screening shell, a vibration wheel is eccentrically arranged on the vibration shaft, and a motor is connected to the vibration shaft. By integrating filtering and impurity removal with graded screening, the overall device function is more comprehensive, the integrated setting effectively synchronizes multiple steps, the screening effect and impurity removal effect are better, and the production efficiency is improved. However, the above patent still has the following problems in actual use: Although the screening device for removing impurities in the production of magnesium oxide screens magnesium oxide by integrating filtering and impurity removal with graded screening, the screening effect may be poor due to the specific gravity problem due to the light specific gravity of magnesium oxide. During vibration screening, the magnesium oxide cannot be screened quickly due to the light specific gravity of magnesium oxide, which not only affects the screening efficiency of magnesium oxide, but also causes the screening mesh plate to be blocked, which is not conducive to the screening of magnesium oxide.

[0004] Therefore, a screening device and a screening method for pre-treated magnesium oxide production are proposed to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a screening device for the production of pre-treated magnesium oxide and a screening method thereof, so as to solve the problem that although the screening device for removing impurities in the production of magnesium oxide proposed in the above-mentioned background technology screens magnesium oxide by integrating filtering and impurity removal with graded screening, due to the light specific gravity of magnesium oxide, the screening effect may be poor due to the specific gravity problem during screening. During vibration screening, due to the light specific gravity of magnesium oxide, the magnesium oxide cannot be screened quickly, which not only affects the screening efficiency of magnesium oxide, but also causes the screening mesh plate to be blocked, which is not conducive to the screening of magnesium oxide.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a screening device for pre-treated magnesium oxide production and a screening method thereof, comprising an airflow screening mechanism, and a negative pressure fan installed on one side of the airflow screening mechanism; A crushing mechanism is provided on one side of the top of the airflow screening mechanism, and an opening and closing bracket is provided on the top of the crushing mechanism; Also includes: The airflow screening mechanism comprises a screening bracket, one side of the inner part of the screening bracket is rotatably connected with a rotating bearing, and a discharge port is fixedly installed at the bottom of the screening bracket; Wherein, a conveying pipe is fixedly installed on one side of the screening bracket close to the rotating bearing, and a feed hopper is fixedly installed on the top of the conveying pipe; Among them, a plurality of air-permeable mesh holes are opened at one end of the conveying pipe away from the screening support, and a conveying motor is fixedly installed at the center position of the end of the conveying pipe away from the screening support.

[0007] Preferably, the output end of the conveying motor is fixedly connected to a conveying rotating rod, a spiral conveying blade is fixedly installed on the outer side of the conveying rotating rod, the negative pressure fan is fixedly installed on the end of the conveying rotating rod close to the spiral conveying blade, and a spiral cleaning blade is fixedly installed on the end of the conveying rotating rod close to the negative pressure fan.

[0008] By adopting the above technical solution, the conveying motor is used to drive the conveying rotating rod and the spiral conveying blades to rotate, thereby realizing the conveying function of magnesium oxide.

[0009] Preferably, a hexagonal rotating bracket is fixedly installed on the end of the conveying rotating rod away from the spiral cleaning blade, a rotating main gear ring is fixedly installed on the outer side of the hexagonal rotating bracket, a rotating slave gear is meshed and connected to the outer side of the rotating main gear ring, a rotating connecting plate is rotatably connected to one side of the rotating slave gear, and a first screening cylinder is rotatably connected between the rotating connecting plates.

[0010] By adopting the above technical solution, a negative pressure fan is used in conjunction with a spiral conveying blade to generate a vortex, so that lighter magnesium oxide can be transported, so that the lighter magnesium oxide adheres to the middle part of the spiral conveying blade, while larger and heavier impurities are screened through the first screening cylinder and the second screening cylinder.

[0011] Preferably, a plurality of cleaning plates are fixedly mounted on the outer side of the first screening cylinder, the cleaning plates are closely connected to the inner wall of the screening bracket, the outer side of the rotating gear is meshingly connected with an engaging gear ring, the outer side of the engaging gear ring is fixedly mounted with a discharge bracket, and the discharge bracket is fixedly mounted on one end of the screening bracket away from the conveying pipe.

[0012] By adopting the above technical solution, lighter magnesium oxide is discharged through the discharge port, and the magnesium oxide is discharged from the discharge bracket through the spiral conveying blade, thereby realizing the screening function of the magnesium oxide.

[0013] Preferably, the first screening cylinder is rotatably connected to the inside of the second screening cylinder, a plurality of engaging grooves are provided on the inner wall of one side of the first screening cylinder, a engaging spring is fixedly installed inside the engaging groove, a engaging slider is fixedly connected to the end of the engaging spring, a plurality of engaging holes are provided on the inner wall of one side of the second screening cylinder, and the engaging slider is engaged and connected to the second screening cylinder through the engaging holes.

[0014] By adopting the above technical solution, the hexagonal rotating bracket and the rotating main gear ring are driven to rotate by the conveying rotating rod, and by utilizing the characteristics of the meshing connection between the rotating main gear ring, the rotating slave gear and the meshing gear ring, the rotating slave gear can rotate on itself and revolve around the center position of the discharge bracket at the same time, so that the rotating connecting plate drives the first screening drum and the second screening drum to rotate under the action of the rotating bearing.

[0015] Preferably, a fixed support block is fixedly installed at the bottom of the conveying pipe, a first support leg is symmetrically installed at the bottom of the fixed support block, second support legs are symmetrically installed on both sides of the bottom of the screening bracket, and a rotating block is fixedly installed on one side of the first screening cylinder and the second screening cylinder.

[0016] By adopting the above technical scheme, the first screening cylinder and the second screening cylinder rotate in opposite directions to the spiral cleaning blades, so that the screening effect of magnesium oxide can be improved, and the cleaning plate is driven to rotate by the first screening cylinder to clean the impurities attached to the inner wall of the screening bracket, and the first screening cylinder and the second screening cylinder are rotated relative to each other by the rotating blocks on one side of the ends of the first screening cylinder and the second screening cylinder, so that the engaging spring and the engaging slider inside the first screening cylinder are engaged and connected with the engaging hole inside the second screening cylinder, thereby realizing the fixation of the first screening cylinder and the second screening cylinder, and the mesh sizes of the first screening cylinder and the second screening cylinder are changed by misaligning the meshes of the first screening cylinder and the second screening cylinder, so that impurities of different particle sizes and uncrushed magnesium oxide can be screened, thereby improving the screening accuracy of magnesium oxide.

[0017] Preferably, the crushing mechanism includes a crushing box, a debris removal box is fixedly installed on the bottom of the crushing box, a material guide trough is fixedly installed on the bottom of the debris removal box, the material guide trough is fixedly installed on the top of the feed hopper, a crushing rotation groove is opened inside the crushing box, a crushing motor is fixedly installed on the back of the crushing box, a meshing gear assembly is fixedly connected to the output end of the crushing motor, a crushing roller is symmetrically connected to one side of the meshing gear assembly, and a plurality of crushing knives are fixedly installed on the outer side of the crushing roller.

[0018] By adopting the above technical solution, the crushing motor outside the crushing box is used to drive the meshing gear assembly and the crushing roller to rotate, and the magnesium oxide can be crushed by the crushing knife.

[0019] Preferably, the opening and closing bracket is fixedly installed on the top of the crushing box, a motor cover is fixedly installed on one side of the top of the opening and closing bracket, an opening and closing motor is fixedly installed on one side of the inner side of the motor cover, the output end of the opening and closing motor is fixedly connected to a sprocket transmission assembly, one side of the sprocket transmission assembly is symmetrically connected to an opening and closing bidirectional threaded rod, the outer sides of the two opening and closing bidirectional threaded rods are symmetrically threaded with opening and closing threaded sleeves, an opening and closing baffle is fixedly installed on the top of the opening and closing threaded sleeve on one side, and the opening and closing baffle is slidably connected to the opening and closing bracket.

[0020] By adopting the above technical scheme, when crushing magnesium oxide, the opening and closing motor is started to drive the sprocket transmission assembly and the opening and closing bidirectional threaded rod to rotate, so that the opening and closing threaded sleeve drives the opening and closing baffle to move relatively, and the top of the opening and closing bracket can be closed, thereby avoiding the phenomenon of dust flying when crushing magnesium oxide, thereby preventing environmental pollution.

[0021] Preferably, cleaning grooves are provided on both sides of the debris removal box, a rotating motor is fixedly installed on the front side of the debris removal box, an output end of the rotating motor is fixedly connected to a rotating connecting shaft, both ends of the rotating connecting shaft are fixedly installed with rotating disks, a plurality of magnet adsorption grids are slidably connected between the two rotating disks, limit plates are fixedly installed at the ends of the magnet adsorption grids, mounting blocks are symmetrically installed at both ends of the limit plates, spring latches are fixedly connected to the outer sides of the mounting blocks, unlocking rings are fixedly installed on the outer sides of the two spring latches, and the unlocking rings are engaged and connected with the rotating disk.

[0022] By adopting the above technical scheme, the rotating motor is started to drive the rotating connecting shaft and the rotating disk to rotate, and the impurity iron filings in the magnesium oxide can be absorbed by using multiple magnet adsorption grids inside the rotating disk. By arranging two groups of rotating disks and magnet adsorption grids staggered up and down, multi-stage filtration of iron filings in the magnesium oxide is achieved, thereby improving the filtration effect. By turning the unlocking ring to drive the spring latch to slide, when the spring latch is separated from the rotating disk, the magnet adsorption grid can be taken out from the inside of the rotating disk, thereby cleaning and replacing the magnet adsorption grid, and by slowly rotating the rotating disk and the crushing roller, the speed of magnesium oxide discharge can be controlled, thereby improving the screening effect of the airflow screening mechanism.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the screening device for the production of pre-treated magnesium oxide and the screening method thereof, the first screening barrel and the second screening barrel are relatively rotated by the rotating block on one side of the end of the first screening barrel and the second screening barrel, so that the engaging spring and the engaging sliding block inside the first screening barrel are engaged and connected with the engaging hole inside the second screening barrel, thereby realizing the fixation of the first screening barrel and the second screening barrel, and the mesh size of the first screening barrel and the second screening barrel is changed by misaligning the meshes of the first screening barrel and the second screening barrel, so that impurities of different particle sizes and unbroken magnesium oxide can be screened, thereby improving the accuracy of magnesium oxide screening, and multi-stage filtration of iron filings in magnesium oxide is realized by arranging two groups of staggered rotating disks and magnet adsorption grids up and down, thereby improving the filtering effect, and the specific contents are as follows: 1. By setting up the airflow screening mechanism, not only can the conveying motor be used to drive the conveying rotating rod and the spiral conveying blades to rotate, so as to realize the conveying function of magnesium oxide, but also the negative pressure fan is used to cooperate with the spiral conveying blades to generate vortex, so as to transport the lighter magnesium oxide, so that the lighter magnesium oxide is attached to the middle part of the spiral conveying blades, and the larger and heavier impurities will be screened through the first screening cylinder and the second screening cylinder, and discharged through the discharge port, and the magnesium oxide is discharged from the discharge bracket through the spiral conveying blades, so as to realize the screening function of magnesium oxide, and the hexagonal rotating bracket and the rotating main gear ring are driven to rotate by the conveying rotating rod, and the meshing connection between the rotating main gear ring, the rotating slave gear and the meshing gear ring is used to realize that the rotating slave gear rotates while revolving around the center position of the discharge bracket, so that the rotating connection The connecting plate drives the first screening cylinder and the second screening cylinder to rotate under the action of the rotating bearing. The first screening cylinder and the second screening cylinder rotate in opposite directions to the spiral cleaning blade, so that the screening effect of magnesium oxide can be improved. The first screening cylinder drives the cleaning plate to rotate, so that impurities attached to the inner wall of the screening bracket can be cleaned. The first screening cylinder and the second screening cylinder are rotated relative to each other by the rotating blocks on one side of the ends of the first screening cylinder and the second screening cylinder, so that the engaging spring and the engaging sliding block inside the first screening cylinder are engaged and connected with the engaging hole inside the second screening cylinder, so as to realize the fixation of the first screening cylinder and the second screening cylinder. By misaligning the meshes of the first screening cylinder and the second screening cylinder, the sizes of the meshes of the first screening cylinder and the second screening cylinder are changed, so that impurities of different particle sizes and uncrushed magnesium oxide can be screened, so as to improve the screening accuracy of magnesium oxide. 2. By setting the crushing mechanism, not only can the crushing motor outside the crushing box be used to drive the meshing gear assembly and the crushing roller to rotate, but the crushing knife can also be used to crush the magnesium oxide. When the magnesium oxide is crushed, the opening and closing motor is started to drive the sprocket transmission assembly and the opening and closing bidirectional threaded rod to rotate, so that the opening and closing threaded sleeve drives the opening and closing baffle to move relatively, and the top of the opening and closing bracket can be closed to avoid the phenomenon of dust flying when the magnesium oxide is crushed, thereby causing environmental pollution. By starting the rotating motor to drive the rotating connecting shaft and the rotating disk to rotate, the impurity iron filings in the magnesium oxide can be absorbed by using multiple magnet adsorption grids inside the rotating disk. By setting two sets of staggered rotating disks and magnet adsorption grids up and down, multi-stage filtration of iron filings in the magnesium oxide is achieved, thereby improving the filtration effect. By turning the unlocking ring to drive the spring latch to slide, when the spring latch is separated from the rotating disk, the magnet adsorption grid can be taken out from the inside of the rotating disk, so as to clean and replace the magnet adsorption grid. By slowly rotating the rotating disk and the crushing roller, the speed of magnesium oxide feeding can be controlled, which is convenient for improving the screening effect of the airflow screening mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the airflow screening mechanism in the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the cross section of the delivery pipe in the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the first screening cylinder and the cleaning plate in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the hexagonal rotating bracket and the rotating main gear ring in the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the cross section of the first screening cylinder and the second screening cylinder in the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of the middle A area; Figure 8 It is a schematic diagram of the three-dimensional structure of the crushing mechanism cross section in the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the crushing roller and the crushing knife in the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the opening and closing baffle in the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the rotating disk and the magnet adsorption grid in the present invention.

[0025] In the figure: 1. airflow screening mechanism; 101. screening bracket; 102. rotating bearing; 103. discharge port; 104. conveying pipe; 105. feeding hopper; 106. air permeable mesh; 107. conveying motor; 108. conveying rotating rod; 109. spiral conveying blade; 110. negative pressure fan; 111. spiral cleaning blade; 112. hexagonal rotating bracket; 113. rotating main gear ring; 114. rotating slave gear; 115. rotating connecting plate; 116. first screening cylinder; 117. cleaning plate; 118. meshing gear ring; 119. discharge bracket; 120. second screening cylinder; 121. engaging slide; 122. engaging spring; 123. engaging slider; 124. engaging hole; 125. fixed support block; 126. The first supporting leg; 127, the second supporting leg; 128, the rotating block; 2, the crushing mechanism; 201, the crushing box; 202, the impurity removal box; 203, the guide trough; 204, the crushing rotating trough; 205, the crushing motor; 206, the meshing gear assembly; 207, the crushing roller; 208, the crushing knife; 209, the opening and closing bracket; 210, the motor cover; 211, the opening and closing motor; 212, the sprocket transmission assembly; 213, the opening and closing two-way threaded rod; 214, the opening and closing threaded sleeve; 215, the opening and closing baffle; 216, the cleaning trough; 217, the rotating motor; 218, the rotating connecting shaft; 219, the rotating disk; 220, the magnet adsorption grid; 221, the limit plate; 222, the mounting block; 223, the spring latch; 224, the unlocking ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 11 The present invention provides a technical solution: a screening device for the production of pre-processed magnesium oxide and a screening method thereof, comprising an airflow screening mechanism 1, and a negative pressure fan 110 installed on one side of the interior of the airflow screening mechanism 1, a crushing mechanism 2 is arranged on one side of the top of the airflow screening mechanism 1, and an opening and closing bracket 209 is arranged on the top of the crushing mechanism 2, the airflow screening mechanism 1 comprises a screening bracket 101, a rotating bearing 102 is rotatably connected to one side of the interior of the screening bracket 101, a discharge port 103 is fixedly installed at the bottom of the screening bracket 101, wherein a conveying pipe 104 is fixedly installed on one side of the screening bracket 101 close to the rotating bearing 102, a feeding hopper 105 is fixedly installed on the top of the conveying pipe 104, wherein a plurality of air permeable mesh holes 106 are opened at one end of the conveying pipe 104 away from the screening bracket 101, a conveying motor 107 is fixedly installed at the center position of one end of the conveying pipe 104 away from the screening bracket 101, and the conveying motor 107 is driven by the conveying motor 107. The outlet end is fixedly connected with a conveying rotating rod 108, and a spiral conveying blade 109 is fixedly installed on the outer side of the conveying rotating rod 108. A negative pressure fan 110 is fixedly installed at the end of the conveying rotating rod 108 close to the spiral conveying blade 109, and a spiral cleaning blade 111 is fixedly installed at the end of the conveying rotating rod 108 close to the negative pressure fan 110. A hexagonal rotating bracket 112 is fixedly installed at the end of the conveying rotating rod 108 away from the spiral cleaning blade 111. The conveying motor 107 is used to drive the conveying rotating rod 108 and the spiral conveying blade 109 to rotate, so as to realize the conveying function of magnesium oxide. At the same time, the negative pressure fan 110 is used to cooperate with the spiral conveying blade 109 to generate eddy current, so that lighter magnesium oxide can be transported, so that the lighter magnesium oxide is attached to the middle part of the spiral conveying blade 109, and the larger and heavier impurities will be screened by the first screening cylinder 116 and the second screening cylinder 120, and discharged through the discharge port 103.

[0028] A rotating main gear ring 113 is fixedly installed on the outer side of the hexagonal rotating bracket 112, and a rotating slave gear 114 is meshed and connected to the outer side of the rotating main gear ring 113. A rotating connecting plate 115 is rotatably connected to one side of the rotating slave gear 114, and a first screening drum 116 is rotatably connected between the rotating connecting plates 115. A plurality of cleaning plates 117 are fixedly installed on the outer side of the first screening drum 116, and the cleaning plates 117 are fitted and connected to the inner wall of the screening bracket 101. A meshing gear ring 118 is meshed and connected to the outer side of the rotating slave gear 114, and a discharge bracket 119 is fixedly installed on the outer side of the meshing gear ring 118. The discharge bracket 119 is fixedly installed on the end of the screening bracket 101 away from the conveying pipe 104, and the interior of the first screening drum 116 is rotatably connected to The second screening drum 120, magnesium oxide is discharged from the discharge bracket 119 through the spiral conveying blades 109, so that the screening function of magnesium oxide can be realized, and the hexagonal rotating bracket 112 and the rotating main gear ring 113 are driven to rotate by the conveying rotating rod 108. By utilizing the characteristics of the meshing connection between the rotating main gear ring 113, the rotating slave gear 114 and the meshing gear ring 118, the rotating slave gear 114 can rotate while revolving around the center position of the discharge bracket 119, so that the rotating connecting plate 115 drives the first screening drum 116 and the second screening drum 120 to rotate under the action of the rotating bearing 102. By the first screening drum 116 and the second screening drum 120 rotating in the opposite direction to the spiral cleaning blade 111, the screening effect of magnesium oxide can be improved.

[0029] A plurality of engaging grooves 121 are provided on the inner wall of one side of the first screening drum 116, and an engaging spring 122 is fixedly installed inside the engaging groove 121, and an engaging slider 123 is fixedly connected to the end of the engaging spring 122. A plurality of engaging holes 124 are provided on the inner wall of one side of the second screening drum 120, and the engaging slider 123 is engaged and connected with the second screening drum 120 through the engaging holes 124. A fixed support block 125 is fixedly installed on the bottom of the conveying pipe 104, and a first supporting leg 126 is symmetrically installed on the bottom of the fixed support block 125. Second supporting legs 127 are symmetrically installed on both sides of the bottom of the screening bracket 101. A rotating block 128 is fixedly installed on one side of the first screening drum 116 and the second screening drum 120, and the cleaning plate is driven by the first screening drum 116 117 rotates, so as to clean the impurities attached to the inner wall of the screening support 101, and the first screening cylinder 116 and the second screening cylinder 120 are rotated relative to each other by the rotating block 128 on one side of the end of the first screening cylinder 116 and the second screening cylinder 120, so that the engaging spring 122 and the engaging slider 123 inside the first screening cylinder 116 are engaged with the engaging hole 124 inside the second screening cylinder 120, thereby realizing the fixation of the first screening cylinder 116 and the second screening cylinder 120, and by misaligning the meshes of the first screening cylinder 116 and the second screening cylinder 120, the mesh sizes of the first screening cylinder 116 and the second screening cylinder 120 are changed, so that impurities of different particle sizes and uncrushed magnesium oxide can be screened, thereby improving the accuracy of magnesium oxide screening.

[0030] The crushing mechanism 2 includes a crushing box 201, a dust removal box 202 is fixedly installed at the bottom of the crushing box 201, a material guide trough 203 is fixedly installed at the bottom of the dust removal box 202, and the material guide trough 203 is fixedly installed on the top of the feed hopper 105. A crushing rotating trough 204 is opened inside the crushing box 201, and a crushing motor 205 is fixedly installed on the back of the crushing box 201. The output end of the crushing motor 205 is fixedly connected to a meshing gear assembly 206, and one side of the meshing gear assembly 206 is symmetrically connected to a crushing roller 207. A plurality of crushing knives 208 are fixedly installed on the outside of the crushing roller 207. The crushing motor 205 outside the crushing box 201 is used to drive the meshing gear assembly 206 and the crushing roller 207 to rotate, and the magnesium oxide can be crushed by the crushing knife 208.

[0031] The opening and closing bracket 209 is fixedly installed on the top of the crushing box 201, and a motor cover 210 is fixedly installed on one side of the top of the opening and closing bracket 209. An opening and closing motor 211 is fixedly installed on one side of the inner side of the motor cover 210. The output end of the opening and closing motor 211 is fixedly connected to a sprocket transmission assembly 212. One side of the sprocket transmission assembly 212 is symmetrically connected to an opening and closing bidirectional threaded rod 213. The outer sides of the two opening and closing bidirectional threaded rods 213 are symmetrically threadedly connected to an opening and closing threaded sleeve 214. The top of the opening and closing threaded sleeve 214 on one side is fixed. An opening and closing baffle 215 is installed, and the opening and closing baffle 215 is slidably connected to the opening and closing bracket 209. Cleaning grooves 216 are opened on both sides of the debris removal box 202. When the magnesium oxide is crushed, the opening and closing motor 211 is started to drive the sprocket transmission assembly 212 and the opening and closing bidirectional threaded rod 213 to rotate, so that the opening and closing threaded sleeve 214 drives the opening and closing baffle 215 to move relatively, and the top of the opening and closing bracket 209 can be closed to avoid the phenomenon of dust flying when the magnesium oxide is crushed, thereby causing environmental pollution.

[0032] A rotating motor 217 is fixedly installed on the front of the debris removal box 202, and a rotating connecting shaft 218 is fixedly connected to the output end of the rotating motor 217. Rotating disks 219 are fixedly installed at both ends of the rotating connecting shaft 218. A plurality of magnet adsorption racks 220 are slidably connected between the two rotating disks 219. A limiting plate 221 is fixedly installed at the end of the magnet adsorption rack 220. Both ends of the limiting plate 221 are symmetrically installed with mounting blocks 222. A spring latch 223 is fixedly connected to the outer side of the mounting block 222. An unlocking ring 224 is fixedly installed on the outer side of the two spring latches 223. The unlocking ring 224 is engaged with the rotating disk 219. By starting the rotating motor 217, the rotating connecting shaft 218 and the rotating disk 218 are driven The moving disk 219 rotates, and the multiple magnet adsorption grids 220 inside the rotating disk 219 can absorb the impurity iron filings in the magnesium oxide. By arranging two sets of rotating disks 219 and magnet adsorption grids 220 staggered up and down, multi-stage filtration of iron filings in the magnesium oxide can be achieved, thereby improving the filtration effect. The spring latch 223 is driven to slide by turning the unlocking ring 224. When the spring latch 223 is separated from the rotating disk 219, the magnet adsorption grid 220 can be taken out from the inside of the rotating disk 219, so as to clean and replace the magnet adsorption grid 220. By slowly rotating the rotating disk 219 and the crushing roller 207, the speed of magnesium oxide discharge can be controlled, thereby improving the screening effect of the airflow screening mechanism 1.

[0033] Working principle: Before using the screening device and screening method for pre-treated magnesium oxide production, it is necessary to first check the overall condition of the device to ensure that it can work normally. Figure 1 - Fig.11As shown, first, magnesium oxide is put into the crushing box 201, and the crushing motor 205 outside the crushing box 201 drives the meshing gear assembly 206 and the crushing roller 207 to rotate, and the magnesium oxide can be crushed by the crushing knife 208. When the magnesium oxide is crushed, the opening and closing motor 211 is started to drive the sprocket transmission assembly 212 and the opening and closing bidirectional threaded rod 213 to rotate, so that the opening and closing threaded sleeve 214 drives the opening and closing baffle 215 to move relatively, and the top of the opening and closing bracket 209 can be closed to avoid the phenomenon of dust flying when the magnesium oxide is crushed, thereby causing environmental pollution. The rotating motor 217 is started to drive the rotating connecting shaft 218 and the rotating disk 21 9 rotates, and the impurity iron filings in the magnesium oxide can be absorbed by utilizing the multiple magnet adsorption grids 220 inside the rotating disk 219. By arranging two groups of rotating disks 219 and magnet adsorption grids 220 staggered up and down, multi-stage filtration of iron filings in the magnesium oxide can be achieved, thereby improving the filtration effect. By turning the unlocking ring 224 to drive the spring latch 223 to slide, when the spring latch 223 is separated from the rotating disk 219, the magnet adsorption grid 220 can be taken out from the inside of the rotating disk 219, thereby cleaning and replacing the magnet adsorption grid 220. By slowly rotating the rotating disk 219 and the crushing roller 207, the speed of magnesium oxide discharge can be controlled, which is convenient for improving the screening effect of the airflow screening mechanism 1.

[0034] Secondly, the conveying motor 107 is used to drive the conveying rotating rod 108 and the spiral conveying blade 109 to rotate, so as to realize the conveying function of magnesium oxide. At the same time, the negative pressure fan 110 is used to cooperate with the spiral conveying blade 109 to generate eddy current, so that the lighter magnesium oxide can be conveyed, so that the lighter magnesium oxide is attached to the middle part of the spiral conveying blade 109, and the larger and heavier impurities will be screened through the first screening cylinder 116 and the second screening cylinder 120, and discharged through the discharge port 103, and the magnesium oxide is discharged from the discharge bracket 119 through the spiral conveying blade 109, so as to realize the screening function of magnesium oxide. The conveying rotating rod 108 drives the hexagonal rotor The movable bracket 112 and the rotating main gear ring 113 rotate, and by utilizing the meshing connection between the rotating main gear ring 113, the rotating slave gear 114 and the meshing gear ring 118, the rotating slave gear 114 can rotate on itself while revolving around the center position of the discharge bracket 119, so that the rotating connecting plate 115 drives the first screening drum 116 and the second screening drum 120 to rotate under the action of the rotating bearing 102. The first screening drum 116 and the second screening drum 120 rotate in the opposite direction to the spiral cleaning blade 111, so as to improve the screening effect of magnesium oxide. By driving the cleaning plate 117 to rotate by the first screening drum 116, impurities attached to the inner wall of the screening bracket 101 can be cleaned.

[0035] Finally, the first screening drum 116 and the second screening drum 120 are rotated relative to each other by the rotating block 128 on one side of the end of the first screening drum 116 and the second screening drum 120, so that the engaging spring 122 and the engaging slider 123 inside the first screening drum 116 are engaged and connected with the engaging hole 124 inside the second screening drum 120, thereby achieving the fixation of the first screening drum 116 and the second screening drum 120. By misaligning the meshes of the first screening drum 116 and the second screening drum 120, the size of the meshes of the first screening drum 116 and the second screening drum 120 is changed, so that impurities of different particle sizes and uncrushed magnesium oxide can be screened, thereby improving the accuracy of magnesium oxide screening.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screening device for the production of pre-treated magnesium oxide, comprising an airflow screening mechanism (1), and a negative pressure fan (110) installed on one side of the airflow screening mechanism (1); A crushing mechanism (2) is provided on one side of the top of the airflow screening mechanism (1), and an opening and closing bracket (209) is provided on the top of the crushing mechanism (2); It is characterized in that Also includes: The airflow screening mechanism (1) comprises a screening support (101), one side of the interior of the screening support (101) is rotatably connected to a rotating bearing (102), and a discharge port (103) is fixedly mounted on the bottom of the screening support (101); A conveying pipe (104) is fixedly mounted on one side of the screening support (101) close to the rotating bearing (102), and a feed hopper (105) is fixedly mounted on the top of the conveying pipe (104); A plurality of air-permeable mesh holes (106) are provided at one end of the conveying pipe (104) away from the screening support (101), and a conveying motor (107) is fixedly mounted at the center of the end of the conveying pipe (104) away from the screening support (101).

2. A screening device for pre-processable magnesium oxide production according to claim 1, characterized in that: The output end of the conveying motor (107) is fixedly connected to a conveying rotating rod (108), a spiral conveying blade (109) is fixedly mounted on the outer side of the conveying rotating rod (108), the negative pressure fan (110) is fixedly mounted on the end of the conveying rotating rod (108) close to the spiral conveying blade (109), and a spiral cleaning blade (111) is fixedly mounted on the end of the conveying rotating rod (108) close to the negative pressure fan (110).

3. A screening device for pre-processable magnesium oxide production according to claim 2, characterized in that: A hexagonal rotating bracket (112) is fixedly mounted on one end of the conveying rotating rod (108) away from the spiral cleaning blade (111); a rotating main gear ring (113) is fixedly mounted on the outer side of the hexagonal rotating bracket (112); a rotating slave gear (114) is meshedly connected to the outer periphery of the rotating main gear ring (113); a rotating connecting plate (115) is rotatably connected to one side of the rotating slave gear (114); and a first screening cylinder (116) is rotatably connected between the rotating connecting plates (115).

4. A screening device for pre-processable magnesium oxide production according to claim 3, characterized in that: A plurality of cleaning plates (117) are fixedly mounted on the outer side of the first screening cylinder (116), the cleaning plates (117) being closely connected to the inner wall of the screening support (101), the outer side of the rotating slave gear (114) being meshingly connected to a meshing gear ring (118), the outer side of the meshing gear ring (118) being fixedly mounted a discharge support (119), the discharge support (119) being fixedly mounted on one end of the screening support (101) away from the conveying pipe (104).

5. A screening device for pre-processed magnesium oxide production according to claim 4, characterized in that: The first screening cylinder (116) is rotatably connected to the inside of the second screening cylinder (120); a plurality of engaging grooves (121) are provided on an inner wall of one side of the first screening cylinder (116); an engaging spring (122) is fixedly installed inside the engaging groove (121); an end of the engaging spring (122) is fixedly connected to a engaging slider (123); a plurality of engaging holes (124) are provided on an inner wall of one side of the second screening cylinder (120); and the engaging slider (123) is engaged and connected to the second screening cylinder (120) via the engaging holes (124).

6. A screening device for pre-processed magnesium oxide production according to claim 5, characterized in that: A fixed support block (125) is fixedly mounted on the bottom of the conveying pipe (104), a first support leg (126) is symmetrically mounted on the bottom of the fixed support block (125), second support legs (127) are symmetrically mounted on both sides of the bottom of the screening bracket (101), and a rotating block (128) is fixedly mounted on one side of each of the first screening cylinder (116) and the second screening cylinder (120).

7. A screening device for pre-processable magnesium oxide production according to claim 6, characterized in that: The crushing mechanism (2) comprises a crushing box (201), a debris removal box (202) is fixedly mounted on the bottom of the crushing box (201), a material guide trough (203) is fixedly mounted on the bottom of the debris removal box (202), the material guide trough (203) is fixedly mounted on the top of the feed hopper (105), a crushing rotation trough (204) is provided inside the crushing box (201), a crushing motor (205) is fixedly mounted on the back of the crushing box (201), a meshing gear assembly (206) is fixedly connected to the output end of the crushing motor (205), a crushing roller (207) is symmetrically connected to one side of the meshing gear assembly (206), and a plurality of crushing knives (208) are fixedly mounted on the outer side of the crushing roller (207).

8. A screening device for pre-processable magnesium oxide production according to claim 7, characterized in that: The opening and closing bracket (209) is fixedly mounted on the top of the crushing box (201); a motor cover (210) is fixedly mounted on one side of the top of the opening and closing bracket (209); an opening and closing motor (211) is fixedly mounted on one side of the inside of the motor cover (210); an output end of the opening and closing motor (211) is fixedly connected to a sprocket transmission assembly (212); an opening and closing bidirectional threaded rod (213) is symmetrically connected to one side of the sprocket transmission assembly (212); the outer sides of the two opening and closing bidirectional threaded rods (213) are symmetrically threadedly connected to opening and closing threaded sleeves (214); an opening and closing baffle (215) is fixedly mounted on the top of the opening and closing threaded sleeves (214) on one side; and the opening and closing baffle (215) is slidably connected to the opening and closing bracket (209).

9. A screening device for the production of pre-treatable magnesium oxide according to claim 8, characterized in that: Cleaning grooves (216) are provided on both sides of the impurity removal box (202). A rotating motor (217) is fixedly installed on the front side of the impurity removal box (202). The output end of the rotating motor (217) is fixedly connected to a rotating connecting shaft (218). Both ends of the rotating connecting shaft (218) are fixedly installed with rotating disks (219). A plurality of magnet adsorption grids (220) are slidably connected between two rotating disks (219). A limiting plate (221) is fixedly installed at the end of the magnet adsorption grid (220). Both ends of the limiting plate (221) are symmetrically installed with mounting blocks (222). The outer side of the mounting block (222) is fixedly connected to a spring latch (223). The outer sides of the two spring latches (223) are fixedly installed with an unlocking ring (224). The unlocking ring (224) is engaged and connected with the rotating disk (219).

10. A screening method for a screening device for the production of pre-treatable magnesium oxide, using the screening device for the production of pre-treatable magnesium oxide as claimed in claim 9, the screening method steps are as follows: Step 1: Put magnesium oxide into the crushing box (201), use the crushing motor (205) outside the crushing box (201) to drive the meshing gear assembly (206) and the crushing roller (207) to rotate, and the crushing knife (208) can crush the magnesium oxide. When crushing the magnesium oxide, start the opening and closing motor (211) to drive the sprocket transmission assembly (212) and the opening and closing bidirectional threaded rod (213) to rotate, so that the opening and closing threaded sleeve (214) drives the opening and closing baffle (215) to move relatively, and the top of the opening and closing bracket (209) can be closed to avoid the phenomenon of dust flying when crushing the magnesium oxide, thereby causing environmental pollution. Start the rotating motor (217) to drive the rotating connecting shaft (218) and the rotating disk (219) ) is rotated, and the impurity iron scraps in the magnesium oxide can be absorbed by using the multiple magnet adsorption grids (220) inside the rotating disk (219). By arranging two groups of rotating disks (219) and magnet adsorption grids (220) staggered in an upper and lower manner, multi-stage filtration of iron scraps in the magnesium oxide is achieved, thereby improving the filtration effect. By turning the unlocking ring (224), the spring latch (223) is driven to slide. When the spring latch (223) is separated from the rotating disk (219), the magnet adsorption grid (220) can be taken out from the inside of the rotating disk (219), thereby cleaning and replacing the magnet adsorption grid (220). By slowly rotating the rotating disk (219) and the crushing roller (207), the speed of magnesium oxide discharge can be controlled, thereby improving the screening effect of the airflow screening mechanism (1); Step 2: The conveying motor (107) is used to drive the conveying rotating rod (108) and the spiral conveying blade (109) to rotate, thereby realizing the conveying function of magnesium oxide. At the same time, the negative pressure fan (110) is used to cooperate with the spiral conveying blade (109) to generate eddy current, thereby conveying lighter magnesium oxide, so that the lighter magnesium oxide is attached to the middle part of the spiral conveying blade (109), while the larger and heavier impurities are screened by the first screening cylinder (116) and the second screening cylinder (120) and discharged through the discharge port (103). The magnesium oxide is discharged from the discharge bracket (119) through the spiral conveying blade (109), thereby realizing the screening function of magnesium oxide. The conveying rotating rod (108) drives the hexagonal rotating bracket ( The rotating connecting plate (115) drives the first screening cylinder (116) and the second screening cylinder (120) to rotate under the action of the rotating bearing (102). The first screening cylinder (116) and the second screening cylinder (120) rotate in the opposite direction to the spiral cleaning blade (111). The first screening cylinder (116) and the second screening cylinder (120) rotate in the opposite direction to the spiral cleaning blade (111). The first screening cylinder (116) drives the cleaning plate (117) to rotate, so that impurities attached to the inner wall of the screening bracket (101) can be cleaned. Step three: The first screening cylinder (116) and the second screening cylinder (120) are relatively rotated by means of a rotating block (128) on one side of the end of the first screening cylinder (116) and the second screening cylinder (120), so that the engaging spring (122) and the engaging slider (123) inside the first screening cylinder (116) are engaged with the engaging hole (124) inside the second screening cylinder (120), thereby achieving the fixation of the first screening cylinder (116) and the second screening cylinder (120). By misaligning the meshes of the first screening cylinder (116) and the second screening cylinder (120), the size of the meshes of the first screening cylinder (116) and the second screening cylinder (120) is changed, so that impurities of different particle sizes and uncrushed magnesium oxide can be screened, thereby improving the accuracy of magnesium oxide screening.

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