CN211755586U - Multistage screening machine of concrete recycled aggregate - Google Patents

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

A multi-stage screening machine for concrete recycled aggregate

technical field

The utility model relates to the technical field of screening machines, in particular to a multi-stage screening machine for concrete recycled aggregates.

Background technique

With the development of urbanization in my country, the discharge of construction waste has increased year by year, and the proportion of renewable components has also continued to increase. However, most of the construction waste is transported to the suburbs or around the city for simple landfill or open storage without any treatment, which not only wastes land and resources, but also pollutes the environment; for a long time, due to the wide range of sources of sand and gravel aggregates The price is low, and it is considered as an inexhaustible raw material and is arbitrarily mined, resulting in a waste of resources.

The production process of concrete aggregate is mainly divided into four steps: 1. Sorting, removing impurities such as wood and glass in the concrete by manual or mechanical equipment; Broken to about 40mm; 3. Strengthening, using physical strengthening technology to make the initially broken concrete particles rotate at high speed in the strengthening treatment equipment, so that the aggregate particles accelerate friction and collision, so that the cement paste and mortar attached to the surface of the aggregate are Can be removed to improve performance. However, in the process of strengthening the concrete particles, the concrete particles will generate a lot of dust, and the dust will enter the cavity and seriously affect the air environment.

Utility model content

The purpose of the utility model is to provide a multi-stage screening machine for concrete recycled aggregate, which has the advantages of reducing the dust in the concrete stone particles and reducing the damage to the air.

The above-mentioned utility model purpose of the present utility model is achieved through the following technical solutions:

A multi-stage screening machine for concrete regenerated aggregate, comprising a bracket on which an outer casing is fixed, a grinding assembly for grinding concrete stone particles is rotatably connected in the outer casing, and a screen is arranged on the lower side of the outer casing Sub-assembly, one side of the outer casing is provided with a feeding assembly for conveying concrete stones to the inside of the grinding assembly, a driving assembly for driving the grinding part to rotate is disposed on the support, and the grinding assembly includes a rotary connection to the grinding assembly. The first grinding sleeve inside the outer casing and the first grinding ball movably placed inside the first grinding sleeve; the inner wall of the first grinding sleeve is provided with a first filter hole; the side wall of the outer casing is provided with There is a dust collection assembly, the dust collection assembly includes a collection pipe connected to one end face of the outer casing, a first air pump connected to the collection pipe, and a dust collection bag connected to the free end of the collection pipe.

By adopting the above solution, when the screening machine is working, the ground concrete particles are transported into the first grinding sleeve, the first grinding sleeve rotates at a high speed under the action of the driving component, and the first grinding balls crush the concrete particles At the same time, through the mutual friction between the concrete particles, the mortar and mud on the surface of the concrete particles are removed, so as to obtain the strengthened concrete particles.

During the grinding process of concrete stone particles, under the action of the first air pump, the dust inside the outer casing is drawn away by the collection pipe, and the dust is collected by the dust collection bag, thereby preventing a large amount of dust from being discharged into the air and reducing the air pollution. of destruction.

Preferably, a hollow air disc is fixed on the inner side of the outer casing on the side of the first grinding sleeve away from the collection pipe, and a number of exhaust holes are opened on the side of the air disc close to the first grinding sleeve , the outer side of the outer casing is provided with a gas supply pump for inputting gas into the gas pan.

By adopting the above scheme, the air supply pump delivers the gas into the gas tray, and the gas is blown to the first grinding sleeve through the exhaust hole, so that the dust flows rapidly to the collection pipeline and accelerates the collection of the dust.

Preferably, the end face close to the collection pipe is inclined from the outer edge to the collection pipe to the side away from the first grinding sleeve.

By adopting the above solution, the end face close to the collection pipe is inclined from the outer edge to the collection pipe to the side away from the first grinding sleeve, and the dust slides to the collection pipe along the inclined plane of the corresponding end face of the outer casing, thereby completing the rapid removal of dust. collect.

Preferably, the outer side of the first grinding sleeve is provided with a second grinding sleeve that rotates synchronously with the first grinding sleeve, the second grinding sleeve is provided with a second filter hole, and the size of the second filter hole is Smaller than the size of the first filter hole, the second grinding sleeve is provided with a second grinding ball.

By adopting the above solution, through the setting of the second grinding sleeve, and the size of the first filter hole is smaller than the size of the second filter hole, the concrete stone particles with larger size are ground in the first grinding sleeve, and the second grinding sleeve grinds the size Smaller concrete particles, in this way, the concrete particles can be ground faster, and the surface grinding effect of the concrete particles is better.

Preferably, the structure of the first grinding sleeve is the same as that of the second grinding sleeve, the first grinding sleeve includes opposite end caps, and the outer sides of the two end caps are circumferentially fixed with a filter side plate and a grinding side The grinding side plate and the filtering side plate are arranged at intervals, and the adjacent filtering side plate is in contact with the grinding side plate, and the first filter hole is opened on the filtering side plate; The side opening is provided with an installation port for convenient replacement of the grinding side plate or the filter side plate, and a sealing cover is fixedly connected to the installation port.

By adopting the above solution, the first grinding sleeve is set in this way, one of the filter side plates or one of the grinding plates is damaged, and the staff can directly carry out one of the filter side plates or one of the grinding side plates through the installation port. For disassembly and replacement, compared with the prior art, the staff needs to disassemble and replace the entire first grinding sleeve, and this solution saves the cost.

Preferably, the drive assembly includes a drive rod which is penetrated and fixed on one end of the first grinding sleeve, and a motor which is fixed on the bracket and drives the drive rod to rotate, and the drive rod rotates with the outer casing. connect.

By adopting the above solution, the first grinding sleeve is stably connected to the outside of the outer casing through the driving rod, and the motor drives the driving rod to rotate, and the driving rod drives the first grinding sleeve to rotate, thereby grinding the concrete particles.

Preferably, the feed pipe of the feeding component, the screw pusher, and the feed funnel, the feed pipe is penetrated and fixed at one end of the outer casing and is rotated and penetrated at one end of the first grinding sleeve , the screw pusher is rotatably installed in the feed pipe and is fixedly connected with the drive rod, and the feed funnel is communicated with the feed pipe and is located on the outside of the outer casing.

By adopting the above solution, the screw pusher is driven by the driving rod, and the screw pusher rotates in the feeding pipeline. In this way, the concrete stone particles in the feeding funnel fall into the feeding pipe, and the concrete stone particles in the feeding pipe are transported to the first grinding sleeve under the action of the screw pusher.

To sum up, the beneficial technical effects of the present utility model are:

1. When the screening machine is working, the ground concrete particles are transported into the first grinding sleeve, the first grinding sleeve rotates at a high speed under the action of the driving assembly, and the first grinding ball crushes the concrete particles while passing through the first grinding sleeve. The mutual friction between the concrete particles removes the mortar and mud on the surface of the concrete particles, thereby obtaining reinforced concrete particles.

2. During the grinding of concrete particles, under the action of the first air pump, the dust inside the outer casing is drawn away by the collection pipe, and the dust is collected by the dust collection bag, thereby preventing a large amount of dust from being discharged into the air and reducing air damage.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the production process;

Fig. 2 is the overall structure schematic diagram of grinding machine;

Fig. 3 is the inner side structure schematic diagram of outer casing;

Fig. 4 is the structural representation of the first grinding sleeve;

Fig. 5 is the partial enlarged schematic diagram of A part in Fig. 3;

Fig. 6 is the structural representation of screening assembly;

FIG. 7 is a partial enlarged schematic view of part B in FIG. 6 .

In the figure: 1. Bracket; 11. Bearing seat; 2. Outer shell; 21. Mounting port; 22. Sealing cover; 23. Discharging funnel; 3. Grinding assembly; 31. First grinding sleeve; 312, grinding side plate; 3121, grinding teeth; 313, filtering side plate; 3131, first filter hole; 314, fastening bolt; 32, second grinding sleeve; 321, second filter hole; 33, first grinding ball ; 34, the second grinding ball; 4, the drive assembly; 41, the drive rod; 42, the pulley; 43, the belt; 44, the motor; 5, the feeding assembly; 51, the feeding pipe; 52, the screw feeder; , feeding funnel; 6, dust collection component; 61, collection pipeline; 62, first air pump; 63, dust collection bag; 631, conveying pipeline; 64, air pan; 641, exhaust hole; 65, air supply pump; 651, air supply pipeline; 7, screening assembly; 71, screening channel; 711, collection cavity; 712, strip outlet; 713, replacement port; 7131, shielding plate; 714, sealing plate; 715, sliding groove 72, the first filter; 721, the guide rod; 722, the guide part; 73, the second filter; 74, the third filter; 75, the first spring; 76, the second spring; 77, the push mechanism; 771 772, the first baffle; 773, the push assembly; 7731, the arc-shaped protrusion; 7732, the rolling element; 774, the second baffle; 8, the guide assembly; 81, the guide sleeve; 82, the sliding rod ; 821, connecting block; 9, dust removal component; 91, dust removal pipe; 911, main pipe; 912, branch pipe; 92, second air pump; 93, dust bag; 001, jaw crusher; 002, cone crusher machine; 003, vertical crusher.

Detailed ways

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

Referring to Figures 1 and 2, the utility model discloses a multi-stage screening and grinding machine for recycled concrete aggregates, which is mainly used for better removal of cement slurry and mortar on concrete. The screening machine includes a bracket 1 on which a cylindrical outer casing 2 is fixed horizontally, and a grinding assembly 3 for grinding concrete stones is rotatably connected to the inner side of the outer casing 2 . On one side of the housing 1, a feeding component 5 for conveying concrete stones into the grinding component 3 is provided, and on the other side of the housing 2, a driving component 4 is provided for driving the grinding component 3 to rotate. On the lower side of the outer casing 2, a screening assembly 7 for screening concrete stones is arranged, and a dust collecting assembly 6 for collecting dust is arranged on the outer casing 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, and the first grinding sleeve 31 is horizontally arranged on the outer casing 2 . Inside, a first filter hole 31131 is provided on the side wall of the first grinding sleeve 31 . A drive rod 41 is vertically penetrated and fixed on one end surface of the first grinding sleeve 31 , the end of the driving rod 41 away from the first grinding sleeve 31 passes through one end surface of the outer casing 2 , and the driving rod 41 rotates with the outer casing 2 through a ball bearing. A bearing seat 11 is vertically arranged on the bracket 1 , and the driving rod 41 is rotatably connected to the bearing seat 11 . The other end surface of the first grinding sleeve 31 is rotatably provided with a feeding pipe 51. The feeding pipe 51 is fixedly and rotatably connected with the first grinding sleeve 31 through a sealed bearing. At the center of the end of 41, the first grinding sleeve 31 is stably rotated inside the outer casing 2 through the driving rod 41 and the feeding pipe 51, and the first grinding ball 33 is movably placed in the first grinding sleeve 31 and the concrete stone is carried out. At the same time, the second grinding sleeve 32 is cylindrical, the side wall of the second grinding sleeve 32 is provided with a second filter hole 321 , and the size of the second filter hole 321 is smaller than that of the first filter hole 3131 . The second grinding sleeve 32 is sleeved on the outside of the first grinding sleeve 31 , the second grinding sleeve 32 is coaxially disposed with the first grinding sleeve 31 , and 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 to the outside of the supply pipe 51 through a ball bearing, and the second grinding balls 34 are movably placed in the second grinding sleeve 32 to further grind the concrete particles.

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 feeding component 5 transports the concrete stone particles into the first grinding sleeve 31 through the feeding pipe 51, and the first grinding balls 33 crush the concrete stones, so that the cement slurry and mortar on the surface of the aggregate are detached, and pass through The first filter hole 2131 is filtered into the second grinding sleeve 32, and the second grinding ball 34 further grinds the concrete stone particles, so that the cement slurry and mortar on the surface of the aggregate are separated, thereby obtaining the aggregate with better quality.

3 and 4 , the structures of the first grinding sleeve 31 and the second grinding sleeve 32 are the same, and now only the structure of the first grinding sleeve 31 is analyzed. The first grinding sleeve 31 includes two circular end caps 311 , and the end caps 31 are disposed opposite to each other. A filter side plate 313 and a grinding side plate 312 are circumferentially connected between the outer sides of the two end covers 311 . Then, the two ends of the filter side plate 313 and the grinding side plate 312 are respectively fixed on the edges of the two end covers 311 by the fastening bolts 314; The concrete particles pass through the filter side plate 313 and fall into the second grinding sleeve 32 . Grinding teeth 3121 are evenly arranged on the inner wall of the grinding side plate 312. When the concrete stone is ground in the first grinding sleeve 31, the grinding teeth 3121 grind the mortar on the surface of the concrete stone, so that the cement slurry and mortar on the surface of the aggregate are separated from the concrete stone. In the same way, the second grinding sleeve 32 further grinds the concrete stone particles.

A strip-shaped installation port 21 is horizontally opened on the top of the outer casing 2. The length and width of the installation port 21 are larger than the dimensions of the filter side plate 213 and the grinding side plate 212. The staff can filter the side plate 213 and the grinding side through the installation port 21. The plate 212 is installed and removed, and a sealing cover 22 for sealing the installation opening 21 is fixed at the installation opening 21 by bolts.

The drive assembly 4 includes a motor 44. The motor 44 is horizontally fixed on the bracket 1. The drive shaft of the motor 44 is arranged in parallel with the drive rod 41. The outer side of the drive shaft of the motor 44 is sleeved and fixed with a belt 43 and a pulley 42. A belt 43 and a pulley 42 are sleeved and fixed, and a driving belt 43 is sleeved on the outer side of the two belts 43 and the pulley 42 . The worker starts the motor 44, the motor 44 drives the driving rod 41 to rotate through the belt 43 pulley 42 and the driving belt 43, and the driving rod 41 drives the first grinding sleeve 31 and the second grinding sleeve 32 to rotate.

The feeding assembly 5 includes the above-mentioned feeding pipeline 51, feeding funnel 53, and screw pusher 52. The bottom of the feeding funnel 53 is connected to the upper part of the side wall of the feeding channel and the outer side of the outer shell 2. The crushed concrete The stone particles are conveyed to the inside of the supply funnel 53 . The screw pusher 52 is horizontally arranged on the inner side of the feeding pipe 51 , one end of the screw pusher 52 extends to the inner side of the first grinding sleeve 31 , and the end of the screw pusher 52 is fixedly connected with the end of the driving rod 41 . , the other end of the screw pusher 52 is rotatably connected with the feeding pipe 51 through a sealed bearing. Therefore, the screw pusher 52 is driven by the driving rod 41 to rotate in the feeding pipe 51 . In this way, the concrete stones in the feeding funnel 53 fall into the feeding pipe 51 , and the concrete stones in the feeding pipe 51 are transported to the first grinding sleeve 31 under the action of the screw pusher 52 . Inside.

3 and 5 , the grinding teeth 3121 are further used to better grind the mud and mortar on the surface of the concrete grains, and the outer casing 2 is provided with a dust collecting assembly 6 for collecting dust. The dust collection assembly 6 includes a collection pipe 61, an air pan 64, an air supply pump 65, and a dust collection bag 63. The collection pipe 61 is sleeved on the outer side of the feed pipe 51 and is fixedly connected with the outer casing 2. The collection pipe 61 is located in the outer casing 2. One end of the inner side is flush with the end surface of the inner wall of the outer casing 2 , and the side of the outer casing 2 close to the collecting pipe 61 is inclined from the outer edge to the collecting pipe 61 to the side away from the driving rod 41 . The side wall of the collection pipe 61 is connected to the outer side of the outer casing 2 with a conveying pipe 631 , the free end of the conveying pipe 631 is connected with a dust collection bag 63 , and the conveying pipe 631 is connected with a first air pump 62 . Under the action of the first air pump 62, the dust is pumped into the dust collection bag 63, so that the grinding teeth 3121 can better grind the mortar on the concrete particles; One side of the pipe 61 is vertically fixed with a disc-shaped air disc 64, the air disc 64 is hollow, the air disc 64 is rotatably sleeved on the outside of the driving rod 41, and the air disc 64 is evenly opened on the side close to the second grinding sleeve 32 There are a number of exhaust holes 641, and an air supply pump 65 is fixed on the bracket 1. An air supply pipeline 651 is connected to the air outlet of the air pump 65 of the air supply pump 65. The air supply pipeline 651 is connected to the inner side of the air plate 64 and is inside the air plate 64. The gas is provided, and the gas blows the dust to the collection pipe 61 through the exhaust hole 641, so as to better collect the dust.

6 and 7, the screening assembly includes a discharge funnel 23 and a screening assembly 7, the discharge funnel 23 is arranged vertically, and the top of the discharge funnel 23 is connected to the lower opening of the outer shell (refer to Figure 2), the screen The subassembly 7 is connected to the lower port of the discharge funnel 23 . The screening assembly 7 includes a vertical screening channel 71, the horizontal section of the screening channel 71 is rectangular, and the top opening of the screening channel 71 is connected to the lower outlet of the feeding channel. The inner side of the screening channel 71 is sequentially provided with a first filter screen 72, a second filter screen 73, and a third filter screen 74 located at different heights from top to bottom. The diameter of the filter hole of the first filter screen 72 is 40 mm, and the second filter screen The diameter of the filter hole 73 is 20mm, the diameter of the filter hole of the third filter screen 74 is 10mm, and the first filter screen 72, the second filter screen 73, and the third filter screen 74 are repeatedly shaken horizontally, thereby realizing the screening of concrete stones. , and then obtain concrete particles in the corresponding size range.

Since the structures of the first filter screen 72 , the second filter screen 73 , and the third filter screen 74 are the same as those of the screening channel 71 , only the connection relationship between the first filter screen and the screening channel 71 will be described. U-shaped sliding grooves 715 (refer to body 2 ) are horizontally opened on both sides of the inner wall of the screening channel 71 . The two sliding grooves 715 are arranged opposite to each other. One side of the screening channel 71 is provided with a bar-shaped outlet 712 at one end of the sliding groove 715, and one side of the first filter screen 72 passes through the bar-shaped outlet 712 and extends to the outside of the screening channel 71, and The lower side of the first filter screen 72 is in contact with the lower side of the inner wall of the strip outlet 712 . Further, the inner wall of the screening channel 71 is horizontally positioned on the lower side of the strip outlet 712 and is provided with a number of guide rods 721 in parallel. Towards the side of the screening channel 71 away from the strip outlet 712 . A second spring 76 is sleeved on the outer side of each guide rod 721 , and a guide portion 722 is welded vertically on the lower side of the first filter screen 72 . It abuts between the guide portion 722 and the inner wall of the screening channel 71, and is used to push the first filter screen 72 to slide to the corresponding side.

The side of the screening channel 71 away from the bar-shaped opening is provided with a push mechanism 77, and the push mechanism 77 pushes the first filter screen 72 to slide to the outside of the bar-shaped discharge port 712. Under the elastic force of the second spring 76, the first filter screen 72 slides toward the inner side of the screening channel 71, so the first filter screen 72 reciprocates horizontally. The pushing mechanism 77 includes a sliding support 771, a first baffle plate 772, and a first spring 75. The sliding support 771 is a plate-shaped body and slides vertically on the side wall of the screening channel 71. The sliding support 771 is connected to the screen The inner walls of the channel 71 are vertically slidably connected, and the first filter screen 72 , the second filter screen 73 , and the third filter screen 74 are located inside the sliding support 771 . The side wall of the sliding support 771 is juxtaposed and fixed with three first baffles 772 from bottom to top. The three first baffles 772 are arranged in parallel and are located directly under the outlet of the discharge funnel 23, and the polished concrete particles fall directly. onto the first baffle plate 772 and slide down onto the first filter screen 72 . When the concrete particles slide down, the first baffle plate 772 pushes the sliding support 771 to slide down. Also, because the first spring 75 is vertically disposed between the sliding support 771 and the screening channel 71, and is used to push the sliding support 771 upward to slide upward, the sliding support 771 repeatedly slides up and down.

It is further realized that the sliding support 771 is vertically slidably connected to the side wall of the screening channel 71, the side wall of the screening channel 71 is provided with a replacement port 713, the sliding support 71 is vertically slid on the inner side of the replacement port 713, and the replacement port 713 The upper and lower sides of the inner wall are respectively fixed with shielding plates 7131, and the sliding support 771 slides up and down and its inner side is always attached to the outside of the two shielding plates 7131. 72, the second filter screen 73, and the third filter screen 74 are all replaced, and the replacement port 713 is fixed with a sealing cover 22 that seals the replacement port 713 by bolts. At the same time, a plurality of groups of guide assemblies 8 are arranged side by side on the inner side of the replacement port 713 , and the guide assemblies 8 are used for the sliding support 771 to slide stably vertically. The guide assembly 8 includes two guide sleeves 81 and a guide rod 721 , the guide rod 721 is vertically arranged in the replacement port 713 , a guide sleeve 81 is vertically slidably sleeved on the upper part of the guide rod 721 , and the guide sleeve 81 is threadedly connected to the replacement port On the upper side of the inner wall of 713 , another guide sleeve 81 is vertically slidably sleeved on the lower part of the guide rod 721 . Swipe to. A 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 the guide rod 721 and the sliding support 771 slide up and down synchronously. In addition, the first spring 75 is sleeved on the outer side of the guide rod 721 and the guide sleeve 81 , the bottom of the first spring 75 is in contact with the lower part of the inner side of the replacement port 713 , and the top of the first spring 75 is in contact with the lower side of the connecting block 821 , so the second spring 76 pushes the first sliding seat to slide upward through the connecting block 821 .

The drive assembly 4 further includes a push assembly 773 , and three sets of push assemblies 773 are respectively disposed between the first filter screen 72 , the second filter screen 73 , and the third filter screen 74 and the sliding support 771 . When the sliding support 771 slides up and down, the sliding support 771 uses the corresponding push component 773 to push the first filter screen 72, the second filter screen 73 and the third filter screen 74 to slide towards the strip outlet 712. The driving force between the filter screen 72 and the sliding support 771 is analyzed.

The push assembly 773 includes a cylindrical rolling member 7732 and an arc-shaped protrusion 7731. The rolling member 7732 is horizontally arranged between one side of the first filter screen 72 and the sliding support 771, and the two ends of the rolling member 7732 are respectively close to the sliding groove 715. The center of the rolling member 7732 is rotatably provided with a rotating shaft, and both ends of the rotating shaft are fixedly connected to the first filter screen 72 , so the rolling member 7732 is rotatably connected to the first filter screen 72 through the rotating shaft. At the same time, the arc-shaped protrusion 7731 is horizontally fixed on the side wall of the sliding support 771, the side wall of the rolling element 7732 abuts on the arc-shaped surface of the arc-shaped protrusion 7731, and the arc-shaped protrusion 7731 is up and down on the sliding support 771. During the sliding process, the rolling element 7732 rolls along the arc surface of the arc-shaped protrusion 7731, the sliding support 771 pushes the rolling element 7732 horizontally through the arc-shaped protrusion 7731, and the rolling element 7732 pushes the first filter screen 72 to the bar-shaped discharge port. 712 moves. When the rolling element 7732 approaches the sliding support 771 along the arc surface of the arc protrusion 7731 , the first filter screen 72 moves toward the sliding support 771 under the elastic force of the second spring 76 , thereby realizing the shaking of the first filter screen 72 .

Specifically, when the ground stone particles pass through the screening channel 71, the stone particles fall onto the baffle plate, and the baffle plate moves downward under the action of the stone particles, the sliding support 771 also moves downward, and the first spring 75 is moved downward. Compression, when the first spring 75 is compressed to a certain degree, the first spring 75 pushes the sliding support 771 to move upward, thereby realizing the repeated movement of the sliding support 771 up and down. When the sliding support 771 slides up and down, the sliding support 771 pushes the rolling element 7732 horizontally through the arc-shaped protrusion 7731, and the rolling element 7732 pushes the first filter screen 72 to slide toward the strip outlet 712, and the second spring 76 is compressed , and the contact position between the arc-shaped protrusion 7731 and the rolling element 7732 changes, the first spring 75 pushes the first filter screen 72 to slide to the inside of the screening channel 71, so as to realize the horizontal repeated movement of the first filter screen 72, thereby realizing The first filter screen 72 screens the concrete stone particles, and the screened concrete stone particles are discharged through the strip outlet 712 . In the same way, the second filter screen 73 and the third filter screen 74 are also shaken horizontally in the same way, so as to screen the concrete stone particles, and the concrete stone particles screened by the third filter screen 74 fall to the screening channel. 71 in the bottom cavity.

Further, three second baffles 774 are arranged side by side from bottom to top on the side of the inner wall of the screening channel 71 away from the sliding support 771. The top projected views of the first baffle 772 are partially coincident. Therefore, the concrete stone particles falling on the first baffle 772 slide down onto the second baffle 774 , and slide down the first baffle 772 along the second baffle 774 , thereby further passing through the first baffle 772 downwards The sliding support 771 is pushed to move downward, so that the first filter screen 72, the second filter screen 73, and the third filter screen 74 are stably shaken horizontally.

2 and 6, the side wall of the screening channel 71 is connected with a dust removal component 9, the dust removal component 9 includes a dust removal pipe 91, a second air pump 9265, and a dust bag, and the dust removal pipe 91 includes a filter connected to the screen. There are three branch pipes 912 on the side wall of the channel 71 and communicated with the inner side of the screening channel 71. The connection points of the three branch pipes 912 and the screening channel 71 are located at different heights, and the two branch pipes 912 are respectively located between the adjacent first baffles 772. During the time, another branch pipe 912 is located above the uppermost first baffle 772, the free ends of the three branch pipes 912 are connected to the main pipe 911, the dust bag 93 is connected to the free end of the main pipe 911, and the second air pump 9265 is connected on the main duct 911 and used to pump the dust into the dust bag 93 .

The embodiments of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention, therefore: all equivalent changes made according to the structure, shape and principle of the present invention are It should be covered within the protection scope of the present invention.

Claims (7)

1. A multi-stage screening machine for concrete recycled aggregates, comprising a bracket (1), an outer casing (2) is fixed on the bracket (1), and the outer casing (2) is rotatably connected with stones for grinding concrete A particle grinding assembly (3), a screening assembly (7) is provided on the lower side of the outer casing (2), and concrete is transported to the inside of the grinding assembly (3) on one side of the outer casing (2). A supply assembly (5) for stone particles, a drive assembly (4) for driving the grinding part to rotate is provided on the bracket (1), and characterized in that: the grinding assembly (3) includes a rotating connection to the outer casing ( 2) The inner first grinding sleeve (31) and the first grinding ball (33) movably placed inside the first grinding sleeve (31); the first grinding sleeve (31) is provided with a first A filter hole (3131); a dust collection assembly (6) is provided on the side wall of the outer casing (2), and the dust collection assembly (6) includes a collection pipe (61) connected to one end face of the outer casing (2) ), a first air pump (62) connected to the collection pipe (61), and a dust collection bag (63) connected to the free end of the collection pipe (61). 2 . The multi-stage screening machine for recycled concrete aggregate according to claim 1 , wherein the inner side of the outer casing ( 2 ) is away from the collection pipe ( 61 ) on the first grinding sleeve ( 31 ). 3 . A hollow air disc (64) is fixed on one side of the air disc (64), and a number of exhaust holes (641) are opened on the side of the air disc (64) close to the first grinding sleeve (31). ) is provided with an air supply pump (65) for inputting air into the air plate (64). 3. The multi-stage screening machine for recycled concrete aggregates according to claim 2, characterized in that: the end face close to the collection pipe (61) moves away from the first edge from the outer edge to the collection pipe (61). One side of the grinding sleeve (31) is inclined. 4 . The multi-stage screening machine for recycled concrete aggregate according to claim 1 , wherein the outer side of the first grinding sleeve ( 31 ) is provided with a synchronous rotation with the first grinding sleeve ( 31 ). 5 . the second grinding sleeve (32), the second grinding sleeve (32) is provided with a second filter hole (321), the size of the second filter hole (321) is smaller than the size of the first filter hole (3131) , the second grinding sleeve (32) is provided with a second grinding ball (34). 5 . The multi-stage screening machine for recycled concrete aggregate according to claim 4 , wherein the first grinding sleeve ( 31 ) and the second grinding sleeve ( 32 ) have the same structure, and the first grinding sleeve ( 31 ) has the same structure. 6 . A grinding sleeve (31) includes opposite end covers (311), and a filter side plate (313) and a grinding side plate (312) are circumferentially fixed on the outer sides of the two end covers (311). (312) is spaced from the filter side plate (313), the adjacent filter side plate (313) is in contact with the grinding side plate (312), and the first filter hole (3131) is opened on the filter side On the plate (313); the upper side of the outer casing (2) is provided with an installation port (21) for convenient replacement of the grinding side plate (312) or the filter side plate (313), and the installation port (21) is fixed at the A sealing cover (22) is attached. 6 . The multi-stage screening machine for recycled concrete aggregate according to claim 1 , wherein the driving component ( 4 ) comprises a driving device which is penetrated and fixed at one end of the first grinding sleeve ( 31 ). 7 . A rod (41), a motor (44) fixed on the bracket (1) and driving the driving rod (41) to rotate, and the driving rod (41) is rotatably connected with the outer casing (2). 7. The multi-stage screening machine for concrete recycled aggregate according to claim 6, characterized in that: the feeding assembly (5) feeding pipeline (51), screw pusher (52), and feeding A material hopper (53), the feeding pipe (51) is fixed on one end of the outer casing (2) and is rotatably penetrated at one end of the first grinding sleeve (31), the screw pusher (52) The feeding funnel (53) is connected to the feeding pipe (51) and is located in the Describe the outer side of the outer casing (2).

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