CN211755586U

CN211755586U - Multistage screening machine of concrete recycled aggregate

Info

Publication number: CN211755586U
Application number: CN202020405079.7U
Authority: CN
Inventors: 康洪君
Original assignee: Shenzhen Green Renewable Resources Co ltd
Current assignee: Shenzhen Green Renewable Resources Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-10-27
Anticipated expiration: 2030-03-25

Abstract

The utility model relates to a multistage screening machine for concrete recycled aggregate, which comprises a bracket, wherein an outer shell is fixed on the bracket, a grinding component is rotationally connected in the outer shell, a screening component is arranged at the lower side of the outer shell, a feeding component is arranged at one side of the outer shell, a driving component is arranged on the bracket, the grinding component comprises a first grinding sleeve and a first grinding ball movably arranged at the inner side of the first grinding sleeve; the inner wall of the first grinding sleeve is provided with a first filtering hole; the lateral wall of shell body is provided with the dust and collects the subassembly, the dust collection subassembly including connect in the collection pipeline of a shell body terminal surface, connect the first aspiration pump on collecting the pipeline and connect in the dust collection bag of collecting the pipeline free end. When concrete stone grain grinds the in-process, under the effect of first air pump, collect the pipeline and take away the inboard dust of shell body to carry out the collection of dust through the dust collection bag, and then prevented during a large amount of dust exhaust air, reduced the destruction of air.

Description

Multistage screening machine of concrete recycled aggregate

Technical Field

The utility model belongs to the technical field of the technique of screening machine and specifically relates to a multistage screening machine of concrete regeneration aggregate is related to.

Background

Along with the development of the urbanization process of China, the discharge amount of construction waste is increased year by year, and the proportion of renewable components is also continuously improved. However, most of the construction waste is not treated at all and is transported to the suburbs or the periphery of cities for simple landfill or open-air stockpiling, which not only wastes land and resources, but also pollutes the environment; for a long time, as the sandstone aggregate is wide in source, easy to obtain and low in price, the sandstone aggregate is regarded as an inexhaustible raw material and is randomly mined, and the waste of resources is caused.

The production process of the concrete aggregate mainly comprises four steps: 1. sorting, namely removing impurities such as wood, glass and the like in the concrete through manual or mechanical equipment; 2. crushing, namely crushing the concrete for multiple times by using a crusher to crush the concrete to about 40 mm; 3. and (3) strengthening, namely, adopting a physical strengthening technology to enable the primarily crushed concrete stone particles to rotate at a high speed in strengthening treatment equipment, so that the friction and collision of the aggregate particles are accelerated, and cement paste and mortar attached to the surface of the aggregate can be removed, thereby improving the service performance. However, in the reinforcing process of the concrete stone particles, more dust is generated by the concrete stone particles, and the dust enters the cavity to seriously affect the air environment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multistage screening machine of concrete recycled aggregate, its advantage lies in, reduces the dust in the concrete stone grain, reduces the destruction to the air.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a multistage screening machine for concrete recycled aggregate comprises a support, wherein an outer shell is fixed on the support, a grinding assembly for grinding concrete stone particles is connected in the outer shell in a rotating mode, a screening assembly is arranged on the lower side of the outer shell, a feeding assembly for conveying the concrete stone particles to the inner side of the grinding assembly is arranged on one side of the outer shell, a driving assembly for driving a grinding part to rotate is arranged on the support, and the grinding assembly comprises a first grinding sleeve and a first grinding ball, wherein the first grinding sleeve is rotatably connected to the inner side of the outer shell, and the first grinding ball is movably arranged on the inner side of the first grinding sleeve; a first filtering hole is formed in the inner wall of the first grinding sleeve; the lateral wall of shell body is provided with the dust and collects the subassembly, the dust collect the subassembly including connect in the collection pipeline of a shell body terminal surface, connect the first aspiration pump on collecting the pipeline and connect in the dust collection bag of collecting the pipeline free end.

Through adopting above-mentioned scheme, when this screening machine during operation, the concrete stone grain that grinds is carried to first grinding cover in, and first grinding cover is high-speed rotatory under drive assembly's effect, and first grinding ball is with concrete stone grain crushing, simultaneously through the looks mutual friction between the muddy soil stone grain, gets rid of mortar and mud on concrete stone grain surface to obtain the concrete stone grain after strengthening.

When concrete stone grain grinds the in-process, under the effect of first air pump, collect the pipeline and take away the inboard dust of shell body to carry out the collection of dust through the dust collection bag, and then prevented during a large amount of dust exhaust air, reduced the destruction of air.

Preferably, a hollow air disc is fixed on one side, away from the collecting pipeline, of the inner side of the outer shell body, a plurality of exhaust holes are formed in one side, close to the first grinding sleeve, of the air disc, and an air supply pump for inputting air into the air disc is arranged on the outer side of the outer shell body.

Through adopting above-mentioned scheme, the air feed pump is to conveying gas in the gas dish, and gas blows to first grinding cover through the exhaust hole to make the quick flow direction of dust collect the pipeline, accelerate the collection of dust.

Preferably, the end surface close to the collecting duct is inclined from the outer edge to the collecting duct to the side far away from the first grinding sleeve.

Through adopting above-mentioned scheme, be close to the terminal surface of collecting pipe sets up to the one side slope of keeping away from first grinding cover from its border to collecting pipe department, and the inclined plane of the corresponding terminal surface of shell body is followed to the dust and is slided to collecting pipe, and then accomplishes the quick collection of dust.

Preferably, a second grinding sleeve which rotates synchronously with the first grinding sleeve is arranged on the outer side of the first grinding sleeve, a second filtering hole is formed in the second grinding sleeve, the size of the second filtering hole is smaller than that of the first filtering hole, and a second grinding ball is arranged in the second grinding sleeve.

Through adopting above-mentioned scheme, grind the setting of cover through the second, and the size that the first size of filtering the hole is less than the size that the second filtered the hole, consequently grind the great concrete stone grain of size in first grinding cover, the second grinds the less concrete stone grain of cover grinding size, this kind of mode, concrete stone grain can be faster ground, and the surface grinding effect of concrete stone grain is better.

Preferably, the first grinding sleeve and the second grinding sleeve are consistent in structure, the first grinding sleeve comprises two end covers which are arranged oppositely, a filtering side plate and a grinding side plate are circumferentially fixed on the outer sides of the two end covers, the grinding side plate and the filtering side plate are arranged at intervals, the adjacent filtering side plate is abutted against the grinding side plate, and the first filtering hole is formed in the filtering side plate; the convenient change has been seted up to the shell body upside grind the installing port of curb plate or filtration curb plate, installing port department fixedly connected with sealed lid.

Through adopting above-mentioned scheme, first grinding cover sets up through this kind of mode, and wherein certain filter curb plate damages or certain lapping plate damages, and the staff can directly carry out wherein certain filter curb plate or certain grinding curb plate through the installing port and dismantle and change again, for having the technique, the staff need dismantle and change whole first grinding cover, and this scheme has practiced thrift the cost.

Preferably, the driving assembly comprises a driving rod fixed at one end of the first grinding sleeve in a penetrating manner, and a motor fixed on the support and driving the driving rod to rotate, and the driving rod is rotatably connected with the outer shell.

Through adopting above-mentioned scheme, first grinding cover is stabilized to rotate through the actuating lever and is connected in the outside of shell body, and the motor drives the actuating lever and rotates, and the actuating lever drives first grinding cover and rotates to grind the concrete stone grain.

Preferably, feed subassembly feed pipeline, spiral pusher and feed funnel, the feed pipeline wears to establish a tip that is fixed in the shell body and rotates and wears to locate a tip of first grinding cover, spiral pusher rotate wear to locate in the feed pipeline and with actuating lever fixed connection, feed funnel communicate in on the feed pipeline and be located the outside of shell body.

By adopting the scheme, the spiral pusher is driven by the driving rod to rotate in the feeding pipeline. From this, in the concrete stone grain dropped to the feed pipeline in the feed hopper, the concrete stone grain in the feed pipeline was under the effect of spiral pusher, and the concrete stone grain is in carrying to first grinding cover in.

To sum up, the utility model discloses a beneficial technological effect does:

1. when this screening machine during operation, the concrete stone grain that grinds is carried to first grinding cover in, and first grinding cover is high-speed rotatory under drive assembly's effect, and first grinding ball is with concrete stone grain crushing, simultaneously through the mutual friction between the muddy soil stone grain, gets rid of mortar and mud on concrete stone grain surface to obtain the concrete stone grain after strengthening.

2. When concrete stone grain grinds the in-process, under the effect of first air pump, collect the pipeline and take away the inboard dust of shell body to carry out the collection of dust through the dust collection bag, and then prevented during a large amount of dust exhaust air, reduced the destruction of air.

Drawings

FIG. 1 is a schematic view of the overall structure of the production process;

FIG. 2 is a schematic view of the overall structure of the grinding mill;

FIG. 3 is a schematic view of the inside structure of the outer case;

FIG. 4 is a schematic view of a first abrasive sleeve configuration;

FIG. 5 is an enlarged partial schematic view of portion A of FIG. 3;

FIG. 6 is a schematic illustration of a screen assembly configuration;

fig. 7 is a partially enlarged schematic view of a portion B in fig. 6.

In the figure: 1. a support; 11. a bearing seat; 2. an outer housing; 21. an installation port; 22. a sealing cover; 23. a discharging hopper; 3. a grinding assembly; 31. a first grinding sleeve; 311. an end cap; 312. grinding the side plate; 3121. grinding the teeth; 313. a filtering side plate; 3131. a first filtering hole; 314. fastening a bolt; 32. a second grinding sleeve; 321. a second filtering hole; 33. a first grinding ball; 34. a second grinding ball; 4. a drive assembly; 41. a drive rod; 42. a belt pulley; 43. a belt; 44. a motor; 5. a supply assembly; 51. a feed conduit; 52. a screw pusher; 53. a feed hopper; 6. a dust collection assembly; 61. a collection pipe; 62. a first air pump; 63. a dust collection bag; 631. a delivery conduit; 64. an air pan; 641. an exhaust hole; 65. an air supply pump; 651. a gas supply duct; 7. a screen assembly; 71. a screening channel; 711. a collection chamber; 712. a strip-shaped discharge hole; 713. replacing the port; 7131. a shielding plate; 714. a sealing plate; 715. a sliding groove; 72. a first filter screen; 721. a guide bar; 722. a guide portion; 73. a second filter screen; 74. a third filter screen; 75. a first spring; 76. a second spring; 77. a pushing mechanism; 771. a sliding support; 772. a first baffle plate; 773. a pushing assembly; 7731. an arc-shaped bulge; 7732. a rolling member; 774. a second baffle; 8. a guide assembly; 81. a guide sleeve; 82. a slide bar; 821. connecting blocks; 9. a dust removal assembly; 91. a dust removal pipeline; 911. a main pipeline; 912. branch pipelines; 92. a second air pump; 93. a dust removal bag; 001. a jaw crusher; 002. a cone crusher; 003. a vertical crusher.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a multistage screening of concrete recycled aggregate grinds machine, this grinds machine mainly used can be better detach the grout and the mortar on the concrete and can get rid of. The screening machine includes support 1, and support 1 is gone up the level and is fixed with cylindric shell body 2, and the inboard rotation of shell body 2 is connected with the grinding unit 3 that is used for grinding the concrete stone. A feeding assembly 5 for conveying concrete stone grains into the grinding assembly 3 is arranged on one side of the shell on the support 1, a driving assembly 4 for driving the grinding assembly 3 to rotate is arranged on the other side of the shell body 2 on the support 1, a screening assembly 7 for screening the concrete stone grains is arranged on the lower side of the shell body 2 on the support 1, and a dust collecting assembly 6 for collecting dust is arranged on the shell body 2.

The grinding assembly 3 includes a first grinding sleeve 31, a second grinding sleeve 32, a first grinding ball 33, and a second grinding ball 34, the first grinding sleeve 31 is cylindrical, the first grinding sleeve 31 is horizontally disposed inside the outer housing 2, and a first filtering hole 31131 is disposed on a sidewall of the first grinding sleeve 31. The driving rod 41 is vertically arranged on one end face of the first grinding sleeve 31 in a penetrating mode, one end, away from the first grinding sleeve 31, of the driving rod 41 penetrates through one end face of the outer shell 2, the driving rod 41 is rotatably connected with the outer shell 2 through a ball bearing, the bearing seat 11 is vertically arranged on the support 1, and the driving rod 41 is rotatably connected to the bearing seat 11. A feed pipeline 51 is rotatably arranged on the other end face of the first grinding sleeve 31 in a penetrating manner, the feed pipeline 51 is fixedly and rotatably connected with the first grinding sleeve 31 through a sealing bearing, and the feed pipeline 51 is fixedly arranged at the center of the end part of the outer shell 2 far away from the driving rod 41 in a penetrating manner, so that the first grinding sleeve 31 stably rotates on the inner side of the outer shell 2 through the driving rod 41 and the feed pipeline 51, and the first grinding balls 33 are movably arranged in the first grinding sleeve 31 and grind concrete stone particles; meanwhile, the second polishing sleeve 32 is cylindrical, and a second filtering hole 321 is formed in a side wall of the second polishing sleeve 32, and the size of the second filtering hole 321 is smaller than that of the first filtering hole 3131. The second grinding sleeve 32 is sleeved outside the first grinding sleeve 31, the second grinding sleeve 32 and the first grinding sleeve 31 are coaxially arranged, the center of one end of the first grinding sleeve 31 is sleeved and fixed on the driving rod 41, the center of the other end of the first grinding sleeve 31 is rotatably connected outside the feeding pipeline 51 through a ball bearing, and the second grinding balls 34 are movably placed in the second grinding sleeve 32 and further grind the concrete stone particles 34.

Specifically, the driving assembly 4 drives the first grinding sleeve 31 and the second grinding sleeve 32 to rotate through the driving rod 41, and the first grinding balls 33 and the second grinding balls 34 roll in the first grinding sleeve 31 and the second grinding sleeve 32, respectively. At this time, the feed unit 5 transports the concrete stone particles into the first grinding sleeve 31 through the feed pipe 51, the first grinding balls 33 crush the concrete stone, so that the cement slurry and the mortar on the surface of the aggregate are separated, and the concrete stone particles are filtered into the second grinding sleeve 32 through the first filtering holes 2131, and the second grinding balls 34 further grind the concrete stone particles, so that the cement slurry and the mortar on the surface of the aggregate are separated, thereby obtaining the aggregate with better quality.

Referring to fig. 3 and 4, the first grinding sleeve 31 corresponds in structure to the second grinding sleeve 32, and only the structure of the first grinding sleeve 31 is now analyzed. The first grinding sleeve 31 includes two circular end caps 311, and the two end caps 31 are disposed opposite to each other. A filtering side plate 313 and a grinding side plate 312 are circumferentially connected between the outer sides of the two end covers 311, the filtering side plate 313 and the grinding side plate 312 are arranged in parallel at intervals, the adjacent filtering side plate 313 is abutted against the side wall of the grinding side plate 312, and the two end parts of the filtering side plate 313 and the grinding side plate 312 are respectively fixed on the edges of the two end covers 311 through fastening bolts 314; meanwhile, the first filtering holes 3131 are opened in the side wall of the filtering side plate 3313, and the crushed concrete stone particles pass through the filtering side plate 313 and fall into the second grinding sleeve 32. The grinding teeth 3121 are uniformly provided on the inner wall of the grinding side plate 312, when the concrete stone particles are ground by the first grinding sleeve 31, the grinding teeth 3121 grind mortar on the surface of the concrete stone particles, so that cement paste and mortar on the surface of the aggregate are separated from the surface of the concrete stone particles, and the second grinding sleeve 32 further grinds the concrete stone particles.

The top of the outer shell 2 is horizontally provided with a strip-shaped mounting opening 21, the length and width of the mounting opening 21 are larger than the sizes of the filtering side plate 213 and the grinding side plate 212, a worker can mount and dismount the filtering side plate 213 and the grinding side plate 212 through the mounting opening 21, and the mounting opening 21 is fixed with a sealing cover 22 for sealing the mounting opening 21 through bolts.

The driving assembly 4 comprises a motor 44 and a motor 44 horizontally fixed on the bracket 1, a driving shaft of the motor 44 is parallel to the driving rod 41, a belt 43 wheel 42 is fixedly sleeved on the outer side of the driving shaft of the motor 44, a belt 43 wheel 42 is fixedly sleeved on the side wall of the driving rod 41, and a driving belt 43 is sleeved on the outer side of the two belt 43 wheels 42. The worker starts the motor 44, the motor 44 drives the driving rod 41 to rotate through the belt 43 and the pulley 42, and the driving rod 41 drives the first grinding sleeve 31 and the second grinding sleeve 32 to rotate.

The feeding assembly 5 comprises the feeding pipe 51, the feeding funnel 53 and the screw feeder 52, wherein the bottom of the feeding funnel 53 is communicated with the upper part of the side wall of the feeding passage and is arranged outside the outer shell 2, and the crushed concrete stone particles are conveyed to the inner side of the feeding funnel 53. The spiral pusher 52 is horizontally arranged inside the feeding pipe 51, one end of the spiral pusher 52 extends to the inside of the first grinding sleeve 31, the end of the spiral pusher 52 is fixedly connected with the end of the driving rod 41, and the other end of the spiral pusher 52 is rotatably connected with the feeding pipe 51 through a sealed bearing. Thus, the screw pusher 52 is driven by the driving rod 41, and the screw pusher 52 rotates in the feeding pipe 51. Thereby, the concrete stone particles in the feed hopper 53 fall into the feed pipe 51, and the concrete stone particles in the feed pipe 51 are conveyed into the first grinding sleeve 31 by the screw pusher 52.

Referring to fig. 3 and 5, the grinding teeth 3121 are further configured to grind slurry and mortar on the surface of concrete stone particles, and the outer casing 2 is provided with a dust collection assembly 6 for collecting dust. The dust collecting assembly 6 comprises a collecting pipeline 61, an air disc 64, an air supply pump 65 and a dust collecting bag 63, the collecting pipeline 61 is sleeved on the outer side of the supply pipeline 51 and fixedly connected with the outer shell 2, one end of the collecting pipeline 61, which is positioned on the inner side of the outer shell 2, is flush with the end surface of the inner wall of the outer shell 2, and one side of the outer shell 2, which is close to the collecting pipeline 61, inclines to one side away from the driving rod 41 from the outer edge of the outer shell to the position of the collecting pipeline. A conveying pipeline 631 is connected to the outer side of the outer shell 2 on the side wall of the collecting pipeline 61, a dust collecting bag 63 is connected to the free end of the conveying pipeline 631, a first air pump 62 is connected to the conveying pipeline 631, dust in the outer shell 2 is pumped into the dust collecting bag 63 under the action of the first air pump 62, and therefore the grinding teeth 3121 can better grind mortar and the like on concrete stone grains; further setting, the vertical discoid air disk 64 that is fixed with in one side that the collecting duct 61 was kept away from to the inboard of shell body 2, air disk 64 cavity sets up, the outside of actuating lever 41 is located to the cover is rotated to air disk 64, a plurality of exhaust holes 641 have evenly been seted up to one side that air disk 64 is close to second grinding sleeve 32, and be fixed with air feed pump 65 on the support 1, air feed pump 65 air pump 65's gas outlet department is connected with air feed line 651, air feed line 651 communicates in air disk 64's inboard and for providing gas in the air disk 64, gas sees through exhaust hole 641 and blows the dust to collecting duct 61, thereby better carry out the collection of dust.

Referring to fig. 6 and 7, the screen assemblies include discharge funnel 23 and screen assemblies 7, discharge funnel 23 is vertically disposed, the top of discharge funnel 23 is connected to the lower opening of the housing shell (see fig. 2), and screen assemblies 7 are connected to the lower opening of discharge funnel 23. The screen assembly 7 comprises a vertically arranged screening channel 71, the horizontal cross-section of the screening channel 71 being rectangular, the top opening of the screening channel 71 being connected to the lower outlet of the feed channel. The inboard top-down of screening passageway 71 has set gradually and is located the first filter screen 72 of co-altitude, second filter screen 73, third filter screen 74, the diameter 40mm of first filter screen 72 filtration pore, the diameter of second filter screen 73 filtration pore is 20mm, the diameter of third filter screen 74 filtration pore is 10mm, and first filter screen 72, second filter screen 73, the horizontal shake of third filter screen 74 repeatedly to realize the screening of concrete stone grain, and then obtain the concrete stone grain of corresponding size scope.

Since the first, second and

third filters

72, 73, 74 are identical in structure to the screening channel 71, only the connection between the first filter and the screening channel 71 will be described. Two sides of the inner wall of the screening channel 71 are horizontally provided with a U-shaped sliding groove 715 (refer to the body 2), the two sliding grooves 715 are oppositely arranged, and two sides of the first filter screen 72 are respectively embedded in the sliding grooves 715 in a horizontal sliding manner. A bar-shaped discharge hole 712 is formed at one end of the sliding groove 715 on one side of the screening channel 71, one side of the first filter 72 penetrates through the bar-shaped discharge hole 712 and extends to the outer side of the screening channel 71, and the lower side of the first filter 72 abuts against the lower side of the inner wall of the bar-shaped discharge hole 712. Further, the inner wall of the screening channel 71 is horizontally arranged right below the strip-shaped discharge hole 712 and is provided with a plurality of guide rods 721 in parallel, the guide rods 721 are vertically arranged with the inner wall of the screening channel 71, and the end parts of the guide rods 721 horizontally face to one side of the screening channel 71 far away from the strip-shaped discharge hole 712. The outside cover of every guide bar 721 is equipped with second spring 76, and the downside vertical welding of first filter screen 72 has a guide 722, and a plurality of guide bars 721 horizontally slide respectively and wear to locate in guide 722, and second spring 76 butt is between guide 722 and the inner wall of screening passageway 71, and is used for promoting first filter screen 72 to slide to corresponding one side.

A pushing mechanism 77 is arranged on one side of the screening channel 71, which is far away from the strip-shaped opening, the pushing mechanism 77 pushes the first filter 72 to slide towards the outer side of the strip-shaped discharge hole 712, and under the elastic force of the second spring 76, the first filter 72 slides towards the inner side of the screening channel 71, so that the first filter 72 horizontally reciprocates. Pushing mechanism 77 includes sliding support 771, first baffle 772, and first spring 75, and sliding support 771 is a plate-shaped body and vertically slides on the side wall of screening channel 71, and sliding support 771 is vertically connected with the inner wall of screening channel 71 in a sliding manner, and first filter screen 72, second filter screen 73, and third filter screen 74 are located inside sliding support 771. Three first baffles 772 are fixed on the side wall of the sliding support 771 in parallel from bottom to top, the three first baffles 772 are arranged in parallel and located right below the outlet of the discharging hopper 23, and the ground concrete stone grains directly fall onto the first baffles 772 and slide onto the first filter screen 72. When the concrete stone falls down, the first blocking plate 772 pushes the sliding support 771 to slide down. Also, since the first spring 75 is vertically disposed between the slide support 771 and the sieving passage 71 and serves to push the slide support 771 to slide upward, the slide support 771 slides up and down repeatedly.

Further realize the vertical sliding connection of sliding support 771 on screening channel 71's lateral wall, screening channel 71's lateral wall has been seted up and has been changed mouth 713, sliding support 71 vertical slip is in the inboard of changing mouth 713, the upside and the downside of changing mouth 713 inner wall are fixed with shielding plate 7131 respectively, and sliding support 771 slides from top to bottom and its inboard laminating in the outside of two shielding plates 7131 all the time, the staff is through taking out sliding support 771, thereby to first filter screen 72, second filter screen 73, and the equal change of third filter screen 74, and change mouth 713 department has sealed lid 22 of changing mouth 713 through the bolt fastening. Meanwhile, a plurality of groups of guide assemblies 8 are arranged in parallel on the inner side of the replacement port 713, and the guide assemblies 8 are used for the stable vertical sliding of the sliding support 771. The guide assembly 8 includes two guide sleeves 81 and a guide rod 721, the guide rod 721 is vertically disposed in the replacing port 713, one guide sleeve 81 is vertically slidably sleeved on the upper portion of the guide rod 721, the guide sleeve 81 is threadedly connected to the upper side of the inner wall of the replacing port 713, the other guide sleeve 81 is vertically slidably sleeved on the lower portion of the guide rod 721, the guide sleeve 81 is threadedly connected to the lower side of the inner wall of the replacing port 713, and the guide rod 721 vertically slides between the two guide sleeves 81. The connecting block 821 is welded to the side wall of the sliding support 771, and the connecting block 821 is welded to the outer side of the guide rod 721, so that the guide rod 721 and the sliding support 771 synchronously slide up and down. The first spring 75 is sleeved outside the guide rod 721 and the guide sleeve 81, the bottom of the first spring 75 abuts against the lower part of the inner side of the replacement port 713, and the top of the first spring 75 abuts against the lower side of the connecting block 821, so that the second spring 76 pushes the first sliding seat to slide upwards through the connecting block 821.

Drive assembly 4 further includes a push assembly 773, and three sets of push assemblies 773 are disposed between first filter 72, second filter 73, and third filter 74, respectively, and shoe 771. In the process that the sliding support 771 slides up and down, the sliding support 771 pushes the first filter screen 72, the second filter screen 73 and the third filter screen 74 to slide towards the strip discharging port 712 by using the corresponding pushing component 773, and only pushing group prices between the first filter screen 72 and the sliding support 771 are analyzed.

The pushing assembly 773 includes a cylindrical rolling member 7732 and an arc-shaped protrusion 7731, the rolling member 7732 is horizontally disposed between one side of the first filter screen 72 and the sliding support 771, two ends of the rolling member 7732 are respectively close to the sliding groove 715, a rotation shaft is rotatably inserted into a center of the rolling member 7732, and two ends of the rotation shaft are fixedly connected to the first filter screen 72, so that the rolling member 7732 is rotatably connected to the first filter screen 72 through the rotation shaft. Meanwhile, the arc-shaped protrusion 7731 is horizontally fixed on the side wall of the sliding support 771, the side wall of the rolling member 7732 abuts against the arc-shaped surface of the arc-shaped protrusion 7731, the rolling member 7732 rolls along the arc-shaped surface of the arc-shaped protrusion 7731 in the process that the sliding support 771 slides up and down, the sliding support 771 horizontally pushes the rolling member 7732 through the arc-shaped protrusion 7731, and the rolling member 7732 pushes the first filter screen 72 to move towards the strip-shaped discharge port 712. When the rolling members 7732 approach the slide support 771 along the arc-shaped surface of the arc-shaped projection 7731, the first filter 72 moves toward the slide support 771 under the elastic force of the second spring 76, thereby realizing shaking of the first filter 72.

Specifically, when the stone grain after the grinding passes through screening passageway 71, the stone grain drops to the baffle on, and the baffle moves down under the effect of stone grain, and sliding support 771 also moves down, and first spring 75 is compressed, compresses to a certain degree when first spring 75, and first spring 75 promotes sliding support 771 upward movement, and then realizes the repetitive motion about sliding support 771. When the sliding support 771 slides up and down, the sliding support 771 horizontally pushes the rolling member 7732 through the arc-shaped protrusion 7731, the rolling member 7732 pushes the first filter screen 72 to slide towards the strip-shaped discharge port 712, the second spring 76 is compressed, the contact position of the arc-shaped protrusion 7731 and the rolling member 7732 is changed, the first spring 75 pushes the first filter screen 72 to slide towards the inner side of the screening channel 71, so that horizontal repeated movement of the first filter screen 72 is realized, then the first filter screen 72 is used for screening concrete stone grains, and the screened concrete stone grains are discharged through the strip-shaped discharge port 712. Similarly, the second filter 73 and the third filter 74 horizontally shake in the same manner, so that the concrete stone particles are screened, and the concrete stone particles screened by the third filter 74 fall into the bottom cavity of the screening passage 71.

Further, three second baffles 774 are arranged in parallel from bottom to top on the side, away from the sliding support 771, of the inner wall of the screening channel 71, the first baffles 772 and the second baffles 774 are arranged in a staggered manner, and the upper projection views of the second baffles 774 and the first baffles 772 are partially overlapped. Therefore, the concrete stone particles falling onto the first baffle 772 slide down onto the second baffle 774 and the first baffle 772 along the second baffle 774, so that the sliding support 771 is further pushed downward by the first baffle 772 to move downward, and the first filter 72, the second filter 73 and the third filter 74 are made to shake horizontally and stably.

Referring to fig. 2 and 6, the side wall of the screening channel 71 is connected with a dust removing assembly 9, the dust removing assembly 9 includes a dust removing pipe 91, a second suction pump 9265 and a dust bag, the dust removing pipe 91 includes three branch pipes 912 connected to the side wall of the screening channel 71 and communicated with the inner side of the screening channel 71, the joints of the three branch pipes 912 and the screening channel 71 are located at different heights, the two branch pipes 912 are respectively located between adjacent first baffles 772, the other branch pipe 912 is located above the uppermost first baffle 772, the free ends of the three branch pipes 912 are communicated with 911, the main pipe 93 is connected to the free end of the main pipe 911, and the second suction pump 9265 is connected to the main pipe 911 and used for sucking dust into the dust bag 93.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a multistage screening machine of concrete recycled aggregate, includes support (1), be fixed with shell body (2) on support (1), shell body (2) internal rotation is connected with grinding unit (3) that are used for grinding concrete stone grain, the downside of shell body (2) is provided with screening subassembly (7), one side of shell body (2) is provided with to feeding subassembly (5) of grinding unit (3) inboard concrete stone grain of carrying, be provided with drive grinding part pivoted drive assembly (4) on support (1), its characterized in that: the grinding assembly (3) comprises a first grinding sleeve (31) rotatably connected to the inner side of the outer shell (2) and a first grinding ball (33) movably placed on the inner side of the first grinding sleeve (31); a first filtering hole (3131) is formed in the inner wall of the first grinding sleeve (31); the lateral wall of shell body (2) is provided with dust collection subassembly (6), dust collection subassembly (6) including connect in collection pipeline (61), the first aspiration pump (62) of connecting on collection pipeline (61) of shell body (2) a terminal surface and connect in bag (63) is collected to the dust of collection pipeline (61) free end.

2. The multistage screening machine for recycled concrete aggregates according to claim 1, characterized in that: the inboard of shell body (2) in one side that collection pipeline (61) was kept away from in first grinding cover (31) is fixed with air disk (64) that the cavity set up, air disk (64) are close to a plurality of exhaust holes (641) have been seted up to one side of first grinding cover (31), the outside of shell body (2) is provided with to air feed pump (65) of input gas in air disk (64).

3. The multistage screening machine for recycled concrete aggregates according to claim 2, characterized in that: the end surface close to the collecting pipeline (61) is obliquely arranged from the outer edge to the collecting pipeline (61) to the side far away from the first grinding sleeve (31).

4. The multistage screening machine for recycled concrete aggregates according to claim 1, characterized in that: the outer side of the first grinding sleeve (31) is provided with a second grinding sleeve (32) which synchronously rotates with the first grinding sleeve (31), the second grinding sleeve (32) is provided with a second filtering hole (321), the size of the second filtering hole (321) is smaller than that of the first filtering hole (3131), and a second grinding ball (34) is arranged in the second grinding sleeve (32).

5. The multistage screening machine for recycled concrete aggregates according to claim 4, characterized in that: the first grinding sleeve (31) and the second grinding sleeve (32) are consistent in structure, the first grinding sleeve (31) comprises two end covers (311) which are arranged oppositely, a filtering side plate (313) and a grinding side plate (312) are fixed on the outer sides of the two end covers (311) in the circumferential direction, the grinding side plate (312) and the filtering side plate (313) are arranged at intervals, the adjacent filtering side plate (313) is abutted against the grinding side plate (312), and the first filtering hole (3131) is formed in the filtering side plate (313); the upper side of the outer shell (2) is provided with a mounting opening (21) which is convenient to replace the grinding side plate (312) or the filtering side plate (313), and the mounting opening (21) is fixedly connected with a sealing cover (22).

6. The multistage screening machine for recycled concrete aggregates according to claim 1, characterized in that: drive assembly (4) including wear to establish and be fixed in actuating lever (41) of first grinding cover (31) one end portion, be fixed in on support (1) and drive actuating lever (41) pivoted motor (44), actuating lever (41) with shell body (2) rotate and are connected.

7. The multistage screening machine for recycled concrete aggregates according to claim 6, characterized in that: the feeding device comprises a feeding assembly (5), a feeding pipeline (51), a spiral pusher (52) and a feeding funnel (53), wherein the feeding pipeline (51) penetrates through one end part fixed on the outer shell (2) and rotates to penetrate through one end part of a first grinding sleeve (31), the spiral pusher (52) rotates to penetrate through the feeding pipeline (51) and is fixedly connected with a driving rod (41), and the feeding funnel (53) is communicated with the feeding pipeline (51) and is positioned on the outer side of the outer shell (2).