A conveying system for machine-made sand screening and a working method thereof

Abstract

The present invention discloses a conveying system for machine-made sand screening and a working method thereof, and relates to the technical field of machine-made sand screening and conveying, comprising a support frame, wherein a first conveyor for conveying unbroken rocks is fixedly connected to the upper side of the support frame, a blocking mechanism for blocking excess rocks is arranged on the upper side of the first conveyor, a crushing mechanism for crushing rocks and screening is installed on one side of the first conveyor, and a second blocking block is arranged to block the stacked excess rocks, thereby effectively preventing excessive materials from piling up in the machine and hindering the normal movement of the roller, and when rocks are continuously piled up, the first blocking block will rise simultaneously with the height of the piled rocks, and when there is no piled rock, a spring will push out the second blocking block and return it to its position, thereby effectively preventing the rocks from piling up too high and flipping over the second blocking block, thereby achieving the effect of high crushing and screening efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of machine-made sand screening and conveying, and more specifically, to a machine-made sand screening and conveying system and a working method thereof. Background Art

[0002] Artificial sand is rock particles with a particle size of less than 4.75mm made by mechanical crushing and screening. Its raw materials come from a wide range of sources, including granite, basalt, limestone, etc. The hardness of granite is greater than that of basalt, and the hardness of basalt is greater than that of limestone. The finished artificial sand is mainly used in concrete with strength grade C60 and below in construction projects such as building, municipal administration, and transportation.

[0003] Before crushing and screening, rocks need to be transported to the crusher for crushing through a conveyor. The rocks on the conveyor are lifted by workers to the transmission entrance of the conveyor through an engineering vehicle. Since the number of rocks lifted by the engineering vehicle is different each time, the amount of rocks transmitted to the crusher by the conveyor may be more or less each time. When there are too many rocks that need to be crushed inside the crusher, too much material accumulates in the machine, which may hinder the normal movement of the roller, reduce the crushing efficiency, and affect the overall output quality. In addition, too many rocks will cause the crusher to overload, causing the bearings inside the crusher to be under greater pressure, which may easily cause the bearings to overheat or even be damaged over time.

[0004] When rocks are crushed and screened, the rocks to be crushed each time may contain rocks of multiple different materials, and the hardness of each different material of rock is also different. When the crushing force is constant, the harder the rock, the larger the crushed particle size, and the smaller the hardness of the rock, the smaller the crushed particle size. After a long period of crushing, the rock particles with large particle size are blocked inside the crusher and cannot be screened out from the crusher, which can easily cause the screen to be blocked, thereby reducing the amount of machine-made sand passing through the screen, reducing the screening efficiency of machine-made sand, and the machine-made sand after hammering cannot pass through the screen in time, and the rock particles inside will be hammered into the air again, which can easily generate too much dust and cause dust pollution.

[0005] Therefore, it is necessary to design a machine-made sand conveying system with uniform material feeding and staged crushing and screening to improve the above-mentioned technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a conveying system for machine-made sand screening and a working method thereof.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a conveying system for machine-made sand screening, comprising a support frame, a first conveyor for conveying uncrushed rocks is fixedly connected to the upper side of the support frame, a blocking mechanism for blocking excess rocks is provided on the upper side of the first conveyor, a crushing mechanism for crushing and screening rocks is installed on one side of the first conveyor, a discharge mechanism for guiding rock particles is provided on the lower side of the crushing mechanism, a screening mechanism for removing sharp rock particles is installed on the lower side of the discharge mechanism, a second conveyor for conveying low-hardness rock particles is provided below one side of the discharge mechanism, a third conveyor for conveying high-hardness rock particles is provided on the lower side of the screening mechanism, and a control box for controlling the movement of the first conveyor, the crushing mechanism, the second conveyor, the third conveyor, the blocking mechanism, the discharge mechanism and the screening mechanism is provided on one side of the support frame.

[0008] The present invention is further configured as follows: the crushing mechanism includes two mounting plates fixedly connected to one side of the first conveyor, the other side of the mounting plate is fixedly connected to a crushing shell, the upper side of the crushing shell is fixedly connected to a feed box, the lower side of the crushing shell is fixedly connected to a first screen plate, and a first hammer assembly and a second hammer assembly are installed inside the crushing shell, and the first hammer assembly and the second hammer assembly have the same structure.

[0009] The present invention is further configured as follows: the first hammer assembly includes a first motor fixedly connected to one side of the crushing shell, the output end of the first motor is fixedly connected to a rotating shaft, the outer side of the rotating shaft is fixedly connected to a plurality of mounting disks in sequence, and the outer side of each mounting disk is evenly fixedly connected to a plurality of hammer blocks.

[0010] The present invention is further configured as follows: the discharge mechanism includes a discharge box fixedly connected to the lower side of the first screen plate, a guide sliding arc groove is provided on one side of the discharge box, a first cylinder vertically and horizontally downward is fixedly connected to one side of the discharge box, a first connecting rod is hinged on the output end of the first cylinder, a sliding column is hinged on the other end of the first connecting rod, the sliding column is slidingly connected to the guide sliding arc groove and a discharge plate is fixedly connected to the other end of the sliding column, the two side surfaces of the discharge plate are inclined, the discharge plate is connected to the discharge box bearing, the first limit block and the second limit block are fixedly connected on both sides of the inner wall of the discharge box, and the upper and lower sides of the first limit block and the second limit block are both inclined.

[0011] By adjusting the different rotation speeds in stages through the crushing mechanism, different crushing forces are adjusted, and then machine-made sand of different materials are screened out, effectively preventing rock particles with large particle sizes from being blocked inside the crusher and unable to be screened out from the crusher, which would easily cause screen blockage. The discharging mechanism then distinguishes the hardness of the crushed machine-made sand according to the rotation speed of the crushing mechanism, and transports it to the transmission end of the second conveyor and the inside of the screening mechanism according to the hardness of the machine-made sand, respectively, to prevent two different materials of rock particles from mixing together and affecting the deformation properties of the concrete, thereby achieving the effects of high screening accuracy and high screening efficiency.

[0012] The present invention is further configured as follows: the material blocking mechanism includes a material blocking box fixedly connected to the upper side of the first conveyor, two first avoidance holes are provided inside the material blocking box, two second avoidance holes are provided in the middle of the two first avoidance holes, a second slide groove is provided on the lower side of the two first avoidance holes, a second guide slide groove is provided on one side of the two second avoidance holes, a first slide groove is provided on one side of the two second avoidance holes, and a first guide slide groove is provided on the upper side of the two first slide grooves.

[0013] The present invention is further configured as follows: a first stop block is slidably connected inside the first guide slot, two first sliders are fixedly connected to the lower side of the first stop block and are slidably connected to the first slot, a second stop block is slidably connected inside the second guide slot, two second sliders are fixedly connected to one side of the second stop block and are slidably connected to the second slot, a spring is fixedly connected inside the second slot, and the other end of the spring is fixedly connected to the second slider.

[0014] The present invention is further configured as follows: a first gear and a second gear are provided in the interior of the second avoidance hole and the first avoidance hole in sequence, a driven shaft is fixedly connected between the first gear and the second gear, the driven shaft is connected to the bearing of the material blocking box, the first gear is meshingly connected to the first slider, and the second gear is meshingly connected to the second slider.

[0015] By setting the second stop block, the stacked excess rocks are blocked, which effectively prevents excessive material from piling up in the machine and hindering the normal movement of the roller. When the rocks continue to accumulate, the first stop block will rise simultaneously with the height of the accumulated rocks, and when there are no accumulated rocks, the spring will push out the second stop block and return it to its position, effectively preventing the rocks from piling up too high and flipping over the second stop block, thereby achieving the effect of high crushing and screening efficiency.

[0016] The present invention is further configured as follows: the screening mechanism includes a fixed plate fixedly connected to the lower side of the discharge box, a second motor is fixedly connected to one side of the fixed plate, an output end of the second motor passes through the fixed plate and is fixedly connected to a screening box, the interior of the screening box is slidably connected with a second screening plate and a third screening plate in sequence from top to bottom, a discharge door is provided on one side in the middle of the second and third screening plates, the upper sides of the discharge door are connected to the screening box bearings, and a sharp removal component is provided on the other side in the middle of the second and third screening plates.

[0017] The present invention is further configured as follows: the sharp removal assembly includes a positioning plate fixedly connected to the lower side of the second screening plate, the lower side bearing of the positioning plate is connected to a turntable, the outer side of the turntable is evenly and fixedly connected with the second rotating plate and the first rotating plate, one end of the first rotating plate is hinged with a second connecting rod, the other end of the second connecting rod is hinged with a first fixed column, and the first fixed column is fixedly connected to the second screening plate.

[0018] The present invention is further configured as follows: the other end of the second rotating plate is hinged with a third connecting rod, the other end of the third connecting rod is hinged with a second fixed column, one side of the screening box is fixedly connected with a second cylinder, the lower side of the second fixed column is fixedly connected with the output end of the second cylinder, the output end of the second cylinder is also fixedly connected with a locking plate, and the other side of the locking plate is fixedly connected with the L-shaped plate.

[0019] The third screen plate and the second screen plate are controlled to reciprocate by the second cylinder, so that when the sharp rock particles and the round rock particles pass through the sieve holes of the third screen plate and the second screen plate, the round rock particles pass directly, and the sharp parts at both ends of the sharp rock particles are directly cut off, and when too many cut rock particles are accumulated between the third screen plate and the second screen plate, the second motor rotates ninety degrees counterclockwise to pour them out from between the third screen plate and the second screen plate, effectively preventing the sharp rock particles from wearing the conveyor belt during transportation, thereby achieving the effects of high transportation safety and high screening efficiency.

[0020] A working method of a conveying system for machine-made sand screening, according to the above-mentioned conveying system for machine-made sand screening, comprises the following steps:

[0021] S1: The first conveyor transports rocks of different materials to the inside of the crushing mechanism, and the blocking mechanism blocks the excess rocks on the transmission end of the first conveyor.

[0022] S2: The crushing mechanism adjusts different rotation speeds in stages, thereby adjusting different crushing forces, and then screening out machine-made sand of different materials.

[0023] S3: The discharging mechanism distinguishes the hardness of the crushed machine-made sand according to the rotation speed of the crushing mechanism, and transports the machine-made sand to the transmission end of the second conveyor and the inside of the screening mechanism according to the hardness of the machine-made sand.

[0024] S4: The screening mechanism performs secondary screening on the high-hardness machine-made sand, cuts off the sharp rock particles, and then transports them to the transmission end of the third conveyor.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The crushing mechanism adjusts different rotation speeds in stages to adjust different crushing forces, and then screens out machine-made sand of different materials, effectively preventing rock particles with large particle sizes from being blocked inside the crusher and unable to be screened out from the crusher, which easily causes screen blockage. The discharging mechanism then distinguishes the hardness of the crushed machine-made sand according to the rotation speed of the crushing mechanism, and transports it to the transmission end of the second conveyor and the inside of the screening mechanism according to the hardness of the machine-made sand, preventing two different materials of rock particles from mixing together and affecting the deformation properties of the concrete, thereby achieving high screening accuracy and high screening efficiency.

[0027] 2. By setting the second stop block, the excess stacked rocks are blocked, which effectively prevents excessive material from accumulating in the machine and hindering the normal movement of the roller. When the rocks continue to accumulate, the first stop block will rise at the same time as the height of the accumulated rocks. When there is no accumulated rock, the spring pushes out the second stop block and returns it to its position, effectively preventing the rocks from piling up too high and flipping over the second stop block, thereby achieving a high crushing and screening efficiency.

[0028] 3. The third screen plate and the second screen plate are controlled to reciprocate by the second cylinder, so that when the sharp rock particles and the round rock particles pass through the sieve holes of the third screen plate and the second screen plate, the round rock particles pass directly, and the sharp parts of the two ends of the sharp rock particles are directly cut off. When too many cut rock particles are accumulated between the third screen plate and the second screen plate, the second motor rotates ninety degrees counterclockwise to pour them out from between the third screen plate and the second screen plate, effectively preventing the sharp rock particles from wearing the conveyor belt during transportation, thereby achieving the effects of high transportation safety and high screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a conveying system for machine-made sand screening according to the present invention;

[0030] Figure 2 It is a structural schematic diagram of the crushing mechanism in the present invention;

[0031] Figure 3It is a schematic structural diagram of the first hammer assembly in the present invention;

[0032] Figure 4 It is a structural schematic diagram of the material blocking mechanism in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure inside the material blocking mechanism of the present invention;

[0034] Figure 6 It is a schematic diagram of the internal structure of the material blocking box in the present invention;

[0035] Figure 7 It is a structural schematic diagram of the discharging mechanism in the present invention;

[0036] Figure 8 It is a schematic diagram of the structure inside the discharge box of the present invention;

[0037] Fig. 9 It is a structural schematic diagram of the screening mechanism in the present invention;

[0038] Fig.10 is a position distribution diagram of the second sieve plate and the third sieve plate in the present invention;

[0039] Fig.11 It is a schematic diagram of the structure of the sharp removal component in the present invention.

[0040] Description of reference numerals: 1, support frame; 2, first conveyor; 3, control box; 4, crushing mechanism; 41, mounting plate; 42, crushing shell; 43, feed box; 44, first hammer assembly; 441, first motor; 442, rotating shaft; 443, mounting plate; 444, hammer block; 45, second hammer assembly; 46, first screen plate;

[0041] 5. Second conveyor; 6. Third conveyor; 7. Stopper mechanism; 71. Stopper box; 711. First guide slide; 712. First slide; 713. First avoidance hole; 714. Second avoidance hole; 715. Second slide; 716. Second guide slide; 72. First stopper block; 73. First slider; 74. First gear; 75. Driven shaft; 76. Second slider; 77. Spring; 78. Second stopper block; 79. Second gear;

[0042] 8. Discharging mechanism; 81. Discharging box; 82. Sliding arc groove; 83. First connecting rod; 84. First cylinder; 85. First limit block; 86. Second limit block; 87. Discharging plate;

[0043] 9. Screening mechanism; 91. Second motor; 92. Fixed plate; 93. Screening box; 94. Second screening plate; 95. Third screening plate; 96. Sharp removal assembly; 961. Positioning plate; 962. Turntable; 963. First rotating plate; 964. Second connecting rod; 965. Second rotating plate; 966. Third connecting rod; 967. Second cylinder; 968. Locking plate; 969. L-shaped plate; 97. Discharging door. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0046] For example, see Figure 1-11 The present invention provides the following technical solutions: a conveying system for machine-made sand screening, comprising a support frame 1, a first conveyor 2 for conveying unbroken rocks is fixedly connected to the upper side of the support frame 1, a blocking mechanism 7 for blocking excess rocks is provided on the upper side of the first conveyor 2, a crushing mechanism 4 for crushing and screening rocks is installed on one side of the first conveyor 2, a discharging mechanism 8 for guiding rock particles is provided on the lower side of the crushing mechanism 4, a screening mechanism 9 for removing sharp rock particles is installed on the lower side of the discharging mechanism 8, a second conveyor 5 for conveying low-hardness rock particles is provided below one side of the discharging mechanism 8, a third conveyor 6 for conveying high-hardness rock particles is provided on the lower side of the screening mechanism 9, and a control box 3 for controlling the movement of the first conveyor 2, the crushing mechanism 4, the second conveyor 5, the third conveyor 6, the blocking mechanism 7, the discharging mechanism 8, and the screening mechanism 9 is provided on one side of the support frame 1.

[0047] See also Figure 2 The crushing mechanism 4 includes two mounting plates 41 fixedly connected to one side of the first conveyor 2, a crushing shell 42 is fixedly connected to the other side of the mounting plate 41, a feed box 43 is fixedly connected to the upper side of the crushing shell 42, a first screen plate 46 is fixedly connected to the lower side of the crushing shell 42, and a first hammer assembly 44 and a second hammer assembly 45 are installed inside the crushing shell 42, and the first hammer assembly 44 and the second hammer assembly 45 have the same structure.

[0048] Specifically, the feed box 43 is used to pass unbroken rocks, and the first screen plate 46 is used to screen the broken rock particles.

[0049] See also Figure 3The first hammer assembly 44 includes a first motor 441 fixedly connected to one side of the crushing shell 42, the output end of the first motor 441 is fixedly connected to a rotating shaft 442, the outer side of the rotating shaft 442 is fixedly connected to a plurality of mounting disks 443 in sequence, and the outer side of each mounting disk 443 is evenly fixedly connected to a plurality of hammer blocks 444.

[0050] Specifically, the rotation of the output end of the first motor 441 is used to control the hammer block 444 to rotate at a high speed, thereby crushing the rock entering the crushing shell 42 and turning it into machine-made sand.

[0051] See also Figure 7 and Figure 8 The discharge mechanism 8 includes a discharge box 81 fixedly connected to the lower side of the first sieve plate 46, a guide sliding arc groove 82 is provided on one side of the discharge box 81, a first cylinder 84 vertically and horizontally downward is fixedly connected to one side of the discharge box 81, a first connecting rod 83 is hinged on the output end of the first cylinder 84, a sliding column is hinged on the other end of the first connecting rod 83, the sliding column is slidably connected to the guide sliding arc groove 82 and a discharge plate 87 is fixedly connected to the other end of the sliding column, the two side surfaces of the discharge plate 87 are inclined surfaces, the discharge plate 87 is connected to the discharge box 81 bearing, and the first limit block 85 and the second limit block 86 are fixedly connected on both sides of the inner wall of the discharge box 81, and the upper and lower sides of the first limit block 85 and the second limit block 86 are both inclined surfaces.

[0052] Specifically, the extension and retraction of the output end of the first cylinder 84 is used to control the sliding of the sliding column along the guide arc groove 82, thereby controlling the discharge plate 87 to rotate clockwise or counterclockwise.

[0053] Assume that granite and limestone are mixed together for crushing, and the power of the first motor 441 is divided into high power and low power.

[0054] When granite and limestone pass through the feed box 43, the first motor 441 is turned on at low power, the output end of the first cylinder 84 is fully extended, the control sliding column slides downward along the guide arc groove 82, and the discharge plate 87 rotates counterclockwise. At this time, one side slope of the discharge plate 87 is in contact with the lower slope of the second limit block 86, and the other side slope of the discharge plate 87 faces downward, opening the outlet to the second conveyor 5. The hammer block 444 rotates normally to crush the rock entering the crushing shell 42. The low-hardness limestone is first crushed into rock particles, which fall to the top of the discharge plate 87 after being screened by the first screen plate 46. Due to gravity, the limestone particles naturally fall to the lower left and finally fall to the transmission end of the second conveyor 5.

[0055] When the number of falling limestone particles decreases, the first motor 441 is turned on at high power, the output end of the first cylinder 84 is completely retracted, the control sliding column slides upward along the guide arc groove 82, and the discharge plate 87 rotates clockwise. At this time, the other side slope of the discharge plate 87 is in contact with the lower slope of the first limit block 85, and one side slope of the discharge plate 87 faces downward, opening the outlet to the screening mechanism 9, and the hammer block 444 rotates at high speed to efficiently crush the rock inside the crushing shell 42. The high-hardness granite is crushed into rock particles, which fall to the top of the discharge plate 87 after being screened by the first screen plate 46. Due to gravity, the limestone particles naturally fall to the lower right and finally fall to the transmission end of the screening box 93.

[0056] By adjusting different rotation speeds in stages through the crushing mechanism 4, different crushing forces are adjusted, and then machine-made sand of different materials are screened out, effectively preventing rock particles with large particle sizes from being blocked inside the crusher and unable to be screened out from the inside of the crusher, which easily causes the screen to be blocked. The discharging mechanism 8 then distinguishes the hardness of the crushed machine-made sand according to the rotation speed of the crushing mechanism 4, and transports it to the transmission end of the second conveyor 5 and the inside of the screening mechanism 9 according to the hardness of the machine-made sand, so as to prevent two different materials of rock particles from mixing together and affecting the deformation properties of the concrete, thereby achieving the effects of high screening accuracy and high screening efficiency.

[0057] In the second embodiment, before the rocks are crushed and screened, they need to be transported to the crusher for crushing through a conveyor. The rocks on the conveyor are lifted by the workers to the transmission entrance of the conveyor through an engineering vehicle. Since the number of rocks lifted by the engineering vehicle is different each time, the amount of rocks transmitted to the crusher by the conveyor may be more or less each time. When there are too many rocks to be crushed inside the crusher, too much material accumulates in the machine, which may hinder the normal movement of the roller, reduce the crushing efficiency, and affect the overall output quality. In addition, too many rocks will cause the crusher to overload, causing the bearings inside the crusher to be under greater pressure, which may easily cause the bearings to overheat or even be damaged over time.

[0058] See also Figure 4-Figure 6 The material blocking mechanism 7 includes a material blocking box 71 fixedly connected to the upper side of the first conveyor 2, and two first avoidance holes 713 are provided inside the material blocking box 71, and two second avoidance holes 714 are provided in the middle of the two first avoidance holes 713, and a second slide groove 715 is provided on the lower side of the two first avoidance holes 713, and a second guide slide groove 716 is provided on one side of the two second slide grooves 715, and a first slide groove 712 is provided on one side of the two second avoidance holes 714, and a first guide slide groove 711 is provided on the upper side of the two first slide grooves 712.

[0059] The first guide groove 711 is internally slidably connected with a first stop block 72, and the lower side of the first stop block 72 is fixedly connected with two first sliders 73 and is slidably connected to the first groove 712. The second guide groove 716 is internally slidably connected with a second stop block 78, and one side of the second stop block 78 is fixedly connected with two second sliders 76 and is slidably connected to the second groove 715. The second groove 715 is internally fixedly connected with a spring 77, and the other end of the spring 77 is fixedly connected to the second slider 76.

[0060] Specifically, the clockwise or counterclockwise rotation of the first gear 74 is used to control the first stop block 72 to move up and down, and to control the second stop block 78 to extend or retract. The first stop block 72 and the second stop block 78 are used to block excess rocks, and the elastic potential energy of the spring 77 is used to reset the second stop block 78.

[0061] The first gear 74 and the second gear 79 are respectively provided inside the second avoidance hole 714 and the first avoidance hole 713, and a driven shaft 75 is fixedly connected between the first gear 74 and the second gear 79. The driven shaft 75 is connected to the bearing of the material blocking box 71, the first gear 74 is meshingly connected to the first slider 73, and the second gear 79 is meshingly connected to the second slider 76.

[0062] Specifically, when the rocks are not stacked, the spring 77 pops out the second stop block 78, making it away from the stop box 71, and the lower side of the first stop block 72 fits with the first guide groove 711 of the stop box 71. When stacked rocks appear, excess rocks are blocked by the second stop block 78, and the blocked rocks remain motionless until there are too few rocks, and the excess rocks fall down and fill the gaps around the small amount of rocks.

[0063] When too many rocks continue to be transmitted, the stacked rocks will gradually rise. As there are too many stacked rocks, the weight generated will be greater, and the second stop block 78 will be squeezed, driving the second slider 76 to slide toward the inside of the second slide groove 715. The spring 77 is compressed by the second slider 76, and the second gear 79 is driven to rotate clockwise, thereby driving the first gear 74 to rotate clockwise through the driven shaft 75, and then driving the first slider 73 to move upward. The first stop block 72 continues to rise. The more rocks are stacked, the greater the height of the first stop block 72, thereby blocking the rocks that are stacked too high.

[0064] When the stacked rocks are filled into the gap around the small amount of rocks, the spring 77 pushes the second stop block 78 back to its original position, driving the second slider 76 away from the second slide groove 715, and the second gear 79 is driven to rotate counterclockwise, thereby driving the first gear 74 to rotate counterclockwise through the driven shaft 75, and then driving the first slider 73 to move downward, and the first stop block 72 continues to descend until the lower side of the first stop block 72 is in contact with the first guide groove 711 of the stop box 71, and the first slider 73 stops moving downward.

[0065] By setting the second stop block 78, the excess stacked rocks are blocked, which effectively prevents excessive material from piling up in the machine and hindering the normal movement of the roller. When the rocks continue to pile up, the first stop block 72 will rise simultaneously with the height of the piled rocks, and when there are no piled rocks, the spring 77 pushes out the second stop block 78 and returns it to its position, effectively preventing the rocks from piling up too high and flipping over the second stop block 78, thereby achieving a high crushing and screening efficiency.

[0066] Embodiment 3: When high-hardness rock is crushed by external force, due to the uniformity and high hardness of its internal structure, stress concentration is easily caused during the propagation of stress waves inside the rock, resulting in the expansion of existing cracks. This stress concentration and crack expansion may cause sharp edges when the rock is broken, and the sharp rock particles will cause wear on the conveyor belt during transportation, especially at the contact point between the material and the conveyor belt. This wear may cause the rubber layer of the conveyor belt to become thinner or even cause holes, thereby shortening the service life of the conveyor belt. In addition, the sharp rock particles may affect the workability and strength of concrete during concrete production, resulting in a decrease in product quality.

[0067] See also Figure 9-11 The screening mechanism 9 includes a fixed plate 92 fixedly connected to the lower side of the discharge box 81, a second motor 91 is fixedly connected to one side of the fixed plate 92, an output end of the second motor 91 passes through the fixed plate 92 and is fixedly connected to a screening box 93, a second screening plate 94 and a third screening plate 95 are slidably connected in sequence from top to bottom inside the screening box 93, a discharge door 97 is provided on one side in the middle of the second screening plate 94 and the third screening plate 95, the upper sides of the discharge door 97 are connected to the bearings of the screening box 93, a sharp removal component 96 is provided on the other side in the middle of the second screening plate 94 and the third screening plate 95.

[0068] Specifically, each sieve hole inside the second sieve plate 94 and the third sieve plate 95 is provided with an annular cutter, and the second motor 91 is used to control the rotation of the sieve box 93, thereby controlling the rotation of the second sieve plate 94 and the third sieve plate 95. When the second sieve plate 94 and the third sieve plate 95 rotate ninety degrees counterclockwise, the discharge door 97 will open due to gravity, and then pour out the rock particles accumulated between the second sieve plate 94 and the third sieve plate 95.

[0069] The sharp removal assembly 96 includes a positioning plate 961 fixedly connected to the lower side of the second screening plate 94, the lower side bearing of the positioning plate 961 is connected to a turntable 962, the outer side of the turntable 962 is evenly and fixedly connected to a second turntable 965 and a first turntable 963, one end of the first turntable 963 is hinged to a second connecting rod 964, the other end of the second connecting rod 964 is hinged to a first fixed column, and the first fixed column is fixedly connected to the second screening plate 94.

[0070] Specifically, the extension of the output end of the second cylinder 967 is used to control the L-shaped plate 969 to move to the right, and then control the third screen plate 95 to move to the right. The third connecting rod 966 is indirectly driven to move to the right, and then drives the second rotating plate 965 and the first rotating plate 963 to rotate counterclockwise with the turntable 962 as the axis, so that the second connecting rod 964 drives the second screen plate 94 to move to the left. Conversely, when the output end of the second cylinder 967 is retracted, the third screen plate 95 moves to the left and the second screen plate 94 moves to the right. The extension and retraction of the output end of the second cylinder 967 is used to drive the third screen plate 95 and the second screen plate 94 to reciprocate.

[0071] The other end of the second rotating plate 965 is hinged to the third connecting rod 966, and the other end of the third connecting rod 966 is hinged to the second fixed column. One side of the screening box 93 is fixedly connected to the second cylinder 967, and the lower side of the second fixed column is fixedly connected to the output end of the second cylinder 967. The output end of the second cylinder 967 is also fixedly connected to a locking plate 968, and the other side of the locking plate 968 is fixedly connected to the L-shaped plate 969.

[0072] When the sharp rock particles and the round rock particles fall into the screening box 93, the output end of the second cylinder 967 retracts and contracts back and forth at high speed, thereby controlling the third screening plate 95 and the second screening plate 94 to reciprocate at high speed, and the round rock particles pass through the sieve holes of the second screening plate 94 and the third screening plate 95, and fall into the transmission end of the third conveyor 6. When the sharp rock particles pass through the sieve holes of the third screening plate 95 and the second screening plate 94, due to the high-speed reciprocating motion of the third screening plate 95 and the second screening plate 94, one end of the sharp rock particles is inside the sieve hole of the third screening plate 95, and the other end of the sharp rock particles is inside the sieve hole of the second screening plate 94. The annular cutter inside the sieve hole cuts off the sharp area of ​​the sharp rock particles, and the cut-off sharp rock particles fall into the transmission end of the third conveyor 6, and at this time, the two ends of the sharp rock particles are no longer sharp.

[0073] When the sharp rock particles are cut off, they may be driven to swing by the third screen plate 95, causing the cut sharp rock particles to lie flat on the upper surface of the third screen plate 95, so that the cut sharp rock particles cannot pass through the screen holes, which may easily cause the screen holes to be blocked. In order to prevent the cut sharp rock particles from blocking the screen holes, the second motor 91 controls the screen box 93 to rotate, thereby controlling the second screen plate 94 and the third screen plate 95 to rotate. When the second screen plate 94 and the third screen plate 95 rotate counterclockwise by ninety degrees, the discharge door 97 will open due to gravity, and then the cut sharp rock particles between the second screen plate 94 and the third screen plate 95 will be poured out. The second motor 91 then rotates clockwise by ninety degrees to control the second screen plate 94 and the third screen plate 95 to return to their positions, and the discharge door 97 will close due to gravity.

[0074] The third screen plate 95 and the second screen plate 94 are controlled to reciprocate by the second cylinder 967, so that when the sharp rock particles and the round rock particles pass through the sieve holes of the third screen plate 95 and the second screen plate 94, the round rock particles pass directly, and the sharp parts at both ends of the sharp rock particles are directly cut off; and when too many cut rock particles are accumulated between the third screen plate 95 and the second screen plate 94, the second motor 91 rotates ninety degrees counterclockwise to pour them out from between the third screen plate 95 and the second screen plate 94, thereby effectively preventing the sharp rock particles from causing wear to the conveyor belt during transportation, thereby achieving the effects of high transportation safety and high screening efficiency.

[0075] Embodiment 4, a working method of a conveying system for machine-made sand screening, according to the above-mentioned conveying system for machine-made sand screening, comprises the following steps:

[0076] S1: The first conveyor 2 transports rocks of different materials to the inside of the crushing mechanism 4, and the blocking mechanism 7 blocks the excess rocks on the transmission end of the first conveyor 2.

[0077] The more specific steps of S1 are, S11: when the rocks are not stacked, the spring 77 pops out the second stop block 78, making it away from the stop box 71, and the lower side of the first stop block 72 fits with the first guide groove 711 of the stop box 71. When stacked rocks appear, the excess rocks are blocked by the second stop block 78, and the blocked rocks remain motionless until there are too few rocks in some places, and the excess rocks fall down and fill the gaps around the small amount of rocks.

[0078] S12: When too many rocks are continuously transmitted, the stacked rocks will gradually rise. As there are too many stacked rocks, the weight generated will be greater, and the second stop block 78 will be squeezed, driving the second slider 76 to slide toward the inside of the second slide groove 715. The spring 77 is compressed by the second slider 76, and the second gear 79 is driven to rotate clockwise, thereby driving the first gear 74 to rotate clockwise through the driven shaft 75, and then driving the first slider 73 to move upward. The first stop block 72 continues to rise. The more rocks are stacked, the greater the height of the first stop block 72, thereby blocking the rocks that are stacked too high.

[0079] S13: When the stacked rocks are filled into the gaps around the small amount of rocks, the spring 77 pushes the second stop block 78 back to its original position, driving the second slider 76 away from the second slide groove 715, and the second gear 79 is driven to rotate counterclockwise, thereby driving the first gear 74 to rotate counterclockwise through the driven shaft 75, and then driving the first slider 73 to move downward, and the first stop block 72 continues to descend until the lower side of the first stop block 72 is in contact with the first guide groove 711 of the stop box 71, and the first slider 73 stops moving downward.

[0080] S2: The crushing mechanism 4 adjusts different rotation speeds in stages, thereby adjusting different crushing forces, and then screening out machine-made sand of different materials.

[0081] S3: The discharging mechanism 8 distinguishes the hardness of the crushed machine-made sand according to the rotation speed of the crushing mechanism 4, and transports the machine-made sand to the transmission end of the second conveyor 5 and the inside of the screening mechanism 9 according to the hardness of the machine-made sand.

[0082] The more specific steps of S3 are, S31: when granite and limestone pass through the feed box 43, the first motor 441 is turned on at low power, the output end of the first cylinder 84 is fully extended, the sliding column is controlled to slide downward along the guide arc groove 82, and the discharge plate 87 rotates counterclockwise. At this time, one side slope of the discharge plate 87 is in contact with the lower slope of the second limit block 86, and the other side slope of the discharge plate 87 faces downward, opening the outlet to the second conveyor 5, and the hammer block 444 rotates normally to crush the rock entering the crushing shell 42. The low-hardness limestone is first crushed into rock particles, which fall to the top of the discharge plate 87 after being screened by the first screen plate 46. Due to gravity, the limestone particles naturally fall to the lower left and finally fall to the transmission end of the second conveyor 5.

[0083] S32: When the number of falling limestone particles decreases, the first motor 441 is turned on at high power, the output end of the first cylinder 84 is completely retracted, the sliding column is controlled to slide upward along the guide arc groove 82, and the discharge plate 87 rotates clockwise. At this time, the other side of the inclined surface of the discharge plate 87 is in contact with the lower inclined surface of the first limit block 85, and one side of the inclined surface of the discharge plate 87 faces downward, opening the outlet to the screening mechanism 9, and the hammer block 444 rotates at high speed to efficiently crush the rock inside the crushing shell 42. The high-hardness granite is crushed into rock particles, which fall to the top of the discharge plate 87 after being screened by the first screen plate 46. Due to gravity, the limestone particles naturally fall to the lower right and finally fall to the transmission end of the screening box 93.

[0084] S4: The screening mechanism 9 performs secondary screening on the high-hardness machine-made sand, cuts off the sharp rock particles, and then transports them to the transmission end of the third conveyor 6.

[0085] The more specific step of S4 is, S41: when the sharp rock particles and the round rock particles fall into the screening box 93, the output end of the second cylinder 967 retracts and contracts back and forth at high speed, thereby controlling the third screening plate 95 and the second screening plate 94 to reciprocate at high speed, and the round rock particles pass through the sieve holes of the second screening plate 94 and the third screening plate 95, and fall into the transmission end of the third conveyor 6. When the sharp rock particles pass through the sieve holes of the third screening plate 95 and the second screening plate 94, due to the high-speed reciprocating motion of the third screening plate 95 and the second screening plate 94, one end of the sharp rock particles is inside the sieve hole of the third screening plate 95, and the other end of the sharp rock particles is inside the sieve hole of the second screening plate 94. The annular cutter inside the sieve hole cuts off the sharp area of ​​the sharp rock particles, and the cut-off sharp rock particles fall into the transmission end of the third conveyor 6, and at this time, the two ends of the sharp rock particles are no longer sharp.

[0086] S42: When the sharp rock particles are cut off, they may be driven by the third screen plate 95 to swing, causing the cut sharp rock particles to lie flat on the upper surface of the third screen plate 95, so that the cut sharp rock particles cannot pass through the screen holes, which may easily cause the screen holes to be blocked. In order to prevent the cut sharp rock particles from blocking the screen holes, the second motor 91 controls the screen box 93 to rotate, thereby controlling the second screen plate 94 and the third screen plate 95 to rotate. When the second screen plate 94 and the third screen plate 95 rotate counterclockwise by ninety degrees, the discharge door 97 will open due to gravity, and then pour out the cut sharp rock particles between the second screen plate 94 and the third screen plate 95. The second motor 91 rotates clockwise by ninety degrees again to control the second screen plate 94 and the third screen plate 95 to return to their original positions, and the discharge door 97 will close due to gravity.

[0087] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A conveying system for machine-made sand screening, characterized in that: It comprises a support frame, a first conveyor is fixedly connected to the upper side of the support frame, a material blocking mechanism is arranged on the upper side of the first conveyor, a crushing mechanism is installed on one side of the first conveyor, a discharging mechanism is arranged on the lower side of the crushing mechanism, a screening mechanism is installed on the lower side of the discharging mechanism, a second conveyor is arranged below one side of the discharging mechanism, a third conveyor is arranged on the lower side of the screening mechanism, and a control box is arranged on one side of the support frame; The crushing mechanism includes two mounting plates fixedly connected to one side of the first conveyor, a crushing shell is fixedly connected to the other side of the mounting plate, a feed box is fixedly connected to the upper side of the crushing shell, a first screen plate is fixedly connected to the lower side of the crushing shell, and a first hammer assembly and a second hammer assembly are installed inside the crushing shell; The discharge mechanism includes a discharge box fixedly connected to the lower side of the first screen plate, a guide arc groove is provided on one side of the discharge box, a first cylinder vertically and horizontally downward is fixedly connected to one side of the discharge box, a first connecting rod is hingedly connected to the output end of the first cylinder, a sliding column is hingedly connected to the other end of the first connecting rod, the sliding column is slidably connected to the guide arc groove and the other end of the sliding column is fixedly connected to the discharge plate, and a first limit block and a second limit block are fixedly connected to both sides of the inner wall of the discharge box; The material blocking mechanism comprises a material blocking box fixedly connected to the upper side of the first conveyor, two first avoidance holes are arranged inside the material blocking box, and two second avoidance holes are arranged between the two first avoidance holes; A second slide groove is provided on the lower side of the two first avoidance holes, a second guide slide groove is provided on one side of the two second slide grooves, a first slide groove is provided on one side of the two second avoidance holes, and a first guide slide groove is provided on the upper side of the two first slide grooves; A first stopper block is slidably connected inside the first guide slot, two first sliders are fixedly connected to the lower side of the first stopper block and are slidably connected to the first slot, a second stopper block is slidably connected inside the second guide slot, two second sliders are fixedly connected to one side of the second stopper block and are slidably connected to the second slot, a spring is fixedly connected inside the second slot, and the other end of the spring is fixedly connected to the second slider; The first gear and the second gear are arranged inside the second avoidance hole and the first avoidance hole respectively, and a driven shaft is fixedly connected between the first gear and the second gear, the driven shaft is connected to the bearing of the material blocking box, the first gear is meshedly connected to the first slider, and the second gear is meshedly connected to the second slider.

2. The conveying system for machine-made sand screening according to claim 1 is characterized in that: The first hammer assembly and the second hammer assembly have the same structure. The first hammer assembly includes a first motor fixedly connected to one side of the crushing shell. The output end of the first motor is fixedly connected to a rotating shaft. The outer side of the rotating shaft is fixedly connected to a plurality of mounting disks in sequence. The outer side of each mounting disk is evenly fixedly connected to a plurality of hammer blocks.

3. The conveying system for machine-made sand screening according to claim 1 is characterized in that: The two side surfaces of the discharge plate are inclined surfaces, the discharge plate is connected to the discharge box bearing, and the upper and lower sides of the first limit block and the second limit block are inclined surfaces; The screening mechanism comprises a fixed plate fixedly connected to the lower side of the discharge box, a second motor is fixedly connected to one side of the fixed plate, and an output end of the second motor passes through the fixed plate and is fixedly connected to the screening box.

4. The conveying system for machine-made sand screening according to claim 3 is characterized in that: The inside of the screening box is slidably connected with the second screening plate and the third screening plate in sequence from top to bottom, a discharge door is provided on one side in the middle between the second and third screening plates, the upper sides of the discharge door are connected to the screening box bearings, and a sharp removal component is provided on the other side in the middle between the second and third screening plates.

5. The conveying system for machine-made sand screening according to claim 4 is characterized in that: The sharp removal assembly includes a positioning plate fixedly connected to the lower side of the second screening plate, the lower side bearing of the positioning plate is connected to a turntable, the outer side of the turntable is evenly and fixedly connected with the second turntable and the first turntable, one end of the first turntable is hinged with a second connecting rod, the other end of the second connecting rod is hinged with a first fixed column, and the first fixed column is fixedly connected to the second screening plate.

6. A conveying system for machine-made sand screening according to claim 5, characterized in that: The other end of the second rotating plate is hinged with a third connecting rod, and the other end of the third connecting rod is hinged with a second fixed column. One side of the screening box is fixedly connected with a second cylinder, and the lower side of the second fixed column is fixedly connected to the output end of the second cylinder. The output end of the second cylinder is also fixedly connected with a locking plate, and the other side of the locking plate is fixedly connected to the L-shaped plate.

7. A working method of a conveying system for machine-made sand screening, using a conveying system for machine-made sand screening as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: The first conveyor transports rocks of different materials to the inside of the crushing mechanism, and the blocking mechanism blocks the excess rocks on the transmission end of the first conveyor; S2: The crushing mechanism adjusts different rotation speeds in stages, thereby adjusting different crushing forces, and then screening out machine-made sand of different materials; S3: The discharging mechanism distinguishes the hardness of the crushed machine-made sand according to the rotation speed of the crushing mechanism, and transports the machine-made sand to the transmission end of the second conveyor and the inside of the screening mechanism according to the hardness of the machine-made sand; S4: The screening mechanism performs secondary screening on the high-hardness machine-made sand, cuts off the sharp rock particles, and then transports them to the transmission end of the third conveyor.

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