CN208098202U - A kind of construction waste crusher - Google Patents

Abstract

The utility model discloses a construction waste crusher. The key points of the technical proposal are as follows: a casing is provided, a feeding port is provided on one side of the casing, a crushing device is arranged in the feeding port, and a device for reducing A dust removal device that produces dust when concrete is broken. The dust removal device includes a water washing dust suppression mechanism installed on the top of the casing and a wind dust suction mechanism installed on both sides of the casing. The wind dust suction mechanism includes a A number of L-shaped tubes on the two side walls of the shell, a rotating assembly arranged on the peripheral surface of the L-shaped tubes for controlling the rotation of the L-shaped tubes, an exhaust pipe arranged outside the casing and connected to the L-shaped tubes in rotation, and arranged in the exhaust pipe The fan and the filter used to reduce the dust in the exhaust pipe are discharged outside the exhaust pipe. The utility model has the advantages that in the project of crushing concrete, the diffusion of dust is reduced, so that the workers are in a good working environment.

Description

construction waste crusher

technical field

The utility model relates to the field of construction waste treatment, in particular to a construction waste crusher.

Background technique

Construction waste mainly refers to reinforced concrete blocks, corrugated and other materials produced by demolition of houses. After sorting, crushing, and screening, these materials can recover part of the steel, and the crushed concrete blocks can also be recycled as raw materials for concrete. Therefore, construction waste has a high recycling value.

The Chinese patent whose authorized announcement number is CN201520907695.1 discloses a construction waste shredder. Including the casing, the top of the casing is equipped with a feed inlet, the bottom of the casing is equipped with a discharge hopper, the bottom of the feed inlet is detachably installed with a screen, and the casing is installed with a primary crushing mechanism and a secondary crushing mechanism from top to bottom. The primary crushing mechanism includes a rotating shaft and a mounting plate. The rotating shaft is fixedly connected to the mounting plate. There are multiple drive rods fixedly connected to the outer periphery of the mounting plate. The driving rods pass through the mounting plate and both ends are detachable. Installed on the casing; the secondary crushing mechanism includes a crushing disc and a drive shaft. A screen, the screen is located under the crushing disc, and the screen is connected to the lower end of the drive shaft in rotation.

The construction waste crusher of this utility model, no matter it is the primary crushing mechanism or the secondary crushing mechanism, in the process of crushing, the concrete fracture will generate a large amount of dust, and the dust will be scattered from the feed port and the discharge port. The surrounding environment has caused certain pollution, which has affected the normal construction of the staff.

Utility model content

The purpose of this utility model is to provide a construction waste crusher, which has the advantage of reducing the diffusion of dust in the project of crushing concrete, so that the staff can be in a good working environment.

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

A construction waste crusher, comprising a casing, one side of the casing is provided with a feeding port, and a crushing device is arranged in the feeding port, and the feature is: the casing is provided with a dust removal device for reducing dust generated when crushing concrete device, the dust removal device includes a water washing and dust-reducing mechanism arranged on the top of the casing and a wind dust suction mechanism arranged on the two side walls of the casing, and the wind dust suction mechanism includes several The L-shaped pipe, the rotating assembly arranged on the peripheral surface of the L-shaped pipe for controlling the rotation of the L-shaped pipe, the exhaust pipe arranged outside the casing and connected to the L-shaped pipe in rotation, the fan arranged in the exhaust pipe and used to reduce exhaust The dust in the air duct is discharged out of the filter screen outside the exhaust duct.

Through the above technical scheme, when the construction waste crusher is working, the crushing device is started, and a large amount of dust will be generated in the process of rolling, cutting and vibrating the concrete, and the dust will be dispersed in the air through the feeding port of the machine casing , being inhaled by the staff will greatly affect the health of the staff. The setting of the water washing and dust suppression mechanism humidifies the raised dust through the sprayed water mist, so that the dust is integrated into the water mist and falls into the casing, reducing the Scattering of dust. The wind dust suction mechanism can suck the remaining dust in the air in the casing into the exhaust pipe, and through the function of the filter screen, the influence of the dust on the external environment can be reduced. The setting of the rotating component enables the L-shaped tube to rotate 360 degrees, sucks all the dust around the L-shaped tube, and improves the efficiency of dust inhalation.

The utility model is further set as follows: the water washing and dust reduction mechanism includes a rotary nozzle, a water pump and a water tank connected in sequence through a connecting pipe, the rotary nozzle is installed on the top of the casing and points into the casing, and is set on the lower surface of the casing for discharging Holes containing dusty waste fluids.

Through the above technical solution, when the water washing and dust suppression mechanism is started, the rotating nozzle sprays the water in the water tank into the casing in a rotating manner, so that most of the space in the casing is covered by water mist. When dust is generated, the water mist and The dust is mixed, so that it leaks from the hole to the outside of the casing, thereby achieving the effect of removing part of the dust.

The utility model further provides that: the rotating assembly includes a rack arranged on the peripheral surface of the L-shaped tube and fixedly connected with the L-shaped tube, a gear matched with the rack, and a second power member for driving the gear to rotate.

Through the above technical scheme, start the second power part, drive the gear to rotate, and drive the L-shaped pipe to rotate through the meshing with the rack. When the fan is started, the rotation of the L-shaped pipe will suck the dust in the direction of 360 degrees into the exhaust pipe , so that the L-shaped pipe inhales dust more efficiently.

The utility model is further configured as follows: a side of the casing away from the feed inlet is provided with a discharge port, one side of the casing is provided with a primary conveyor belt leading to the feed port for conveying materials, and the crushing device includes sequentially The primary rolling mechanism installed in the casing for primary rolling and crushing the concrete wrapped with steel bars, the cutting and pressing mechanism installed in the casing for cutting the concrete wrapped with steel bars, and the cutting mechanism installed in the casing for crushing the wrapped concrete The secondary rolling mechanism for concrete crushing and rolling of steel bars and the vibrating screen mechanism for separating the remaining concrete and steel bars are arranged in the casing.

Through the above technical solution, a construction waste processing equipment is provided with a primary rolling mechanism, a cutting mechanism, a secondary rolling mechanism and a vibrating screen mechanism for separating concrete and steel bars in sequence in the casing. The primary rolling mechanism mainly breaks the concrete wrapped around the steel bar. Although the steel bar cannot be separated from the concrete, it will make the concrete crack and stick to the steel bar. The cutting and pressing mechanism mainly cuts and compresses the concrete into small pieces. It is easier to carry out the post-processing, and then crush the small pieces of concrete into finer pieces through the secondary rolling mechanism, so as to separate them from the steel bars, and finally filter the concrete and steel bars to different positions through the vibrating screen mechanism, so that it is convenient Recycling and utilization of concrete and steel bars.

The utility model is further configured as follows: the primary rolling mechanism includes a first transmission roller that is flush with the feed inlet and rotatably connected with the inner wall of the casing, a first driving member that is fixedly connected with the casing and drives the transmission roller to rotate, and The first squeeze roller directly above the first conveying roller, the second drive member for driving the first squeeze roller, and the first power member fixedly connected with the casing to drive the first squeeze roller for squeezing the concrete wrapped with steel bars , the first extrusion roller is provided with an extrusion protrusion for conveniently crushing the concrete wrapped with the steel bar.

Through the above technical solution, the construction waste is placed on the primary conveyor belt, so that the reinforced concrete enters the casing from the feed inlet and moves on the first conveying roller to the discharge outlet. At this time, it is pressed down by the first power member The function is to make the first extrusion roller contact with the construction waste, and under the influence of the extrusion protrusion, the whole piece of concrete is broken into blocks, but it is also adhered to the reinforcement under the influence of the reinforcement. The first driving member and the second driving The parts enable the construction waste to be conveyed to the next mechanism during the crushing process, so the primary rolling mechanism mainly plays the role of preliminary crushing of the construction waste.

The utility model is further configured as follows: the cutting and pressing mechanism includes several second conveying rollers arranged on the side of the first conveying roller away from the feed port, horizontal to the first conveying roller and connected to the casing in rotation, driving the second conveying roller A second driving member for the rotation of the rollers and a cutting assembly arranged above the second conveying rollers for chopping the concrete encased in the steel bars.

Through the above-mentioned technical scheme, after the primary rolling mechanism finishes working, the construction waste is conveyed to the second conveying roller. During the moving process of the construction waste, the concrete wrapped with the steel bar is cut and compressed under the action of the cutting component, so that the concrete After being under pressure, it breaks into small blocks, but it does not cause damage to the steel bars, so that the steel bars bonded to the concrete enter the next mechanism.

The utility model is further provided that: the cutting assembly includes a cutting knife arranged vertically above the second conveying roller, and a second power part that drives the cutting knife to press down to chop the concrete wrapped with steel bars.

Through the above-mentioned technical scheme, the working of the second power part controls the downward pressure of the cutting knife to cut and compress the concrete wrapped with steel bars, so that the concrete will break under the pressure of the cutting knife, making the concrete more finely crushed and easier to cut. Institutional processing.

The utility model is further configured as follows: the secondary rolling mechanism includes a secondary conveyor belt arranged on the side of the second conveying roller away from the first conveying roller obliquely to the top of the casing, and is arranged on the secondary conveyor belt away from the second conveying roller Squeeze components below the end of the

Through the above technical scheme, the construction waste passed through the cutting and pressing mechanism is sent to the secondary conveyor belt, and the construction waste is conveyed to a high place through the secondary conveyor belt, and then the construction waste is squeezed and separated again by the crushing component, so that most of the Concrete and steel are separated.

The utility model is further configured as follows: the crushing assembly includes a first support plate and a second support plate horizontally arranged with a certain gap, a second extrusion roller and a third support plate rotatably connected to the first support plate and the second support plate Squeeze roller, drive the second squeeze roller and the third squeeze roller to rotate to the third driver and the fourth driver of the middle of the second squeeze roller and the third squeeze roller, and drive the second squeeze roller and the third squeeze roller The third power part and the fourth power part moving opposite to each other are squeezed rollers.

Through the above technical solution, under the drive of the third drive member and the fourth drive member, the second squeeze roller and the third squeeze roller rotate toward the middle of the second squeeze roller and the third squeeze roller so that the secondary The construction waste of the rolling mechanism is fully squeezed, and the concrete can also be assisted to squeeze by controlling the expansion and contraction of the third and fourth power parts. Due to the rolling and extrusion of the first two stages, the concrete is more compact Fine crushing, when the second extrusion roller and the third extrusion roller rotate, it is easier to crush the construction waste, so that the concrete and the steel bar are separated.

The utility model is further configured as follows: the vibrating sieve mechanism includes a vibrating sieve supporting plate arranged below the secondary rolling mechanism and inclined to the book material opening, several filter holes opened on the vibrating sieve supporting plate, and the vibrating sieve A number of elastic parts fixedly connected to the supporting plate and the casing, and a vibration motor driving the vibration of the vibrating screen supporting plate.

Through the above technical scheme, the construction waste passed through the secondary rolling mechanism falls onto the vibrating sieve supporting plate and is acted by the vibrating motor, so that the weak concrete adhered to the steel bar falls from the filter hole, thereby reaching the filtering and filtering of the steel bar and concrete. Separation, the filtered steel bars will move to the discharge port, so that the steel bars will be separated for recycling and utilization.

In summary, the utility model has the following beneficial effects:

1. To reduce the discharge of dust, the setting of the water washing and dust suppression mechanism humidifies the raised dust through the sprayed water mist, so that the dust can be integrated into the water mist, and then fall into the casing, reducing the scattering of dust. The wind dust suction mechanism can suck the remaining dust in the air in the casing into the exhaust pipe, and through the function of the filter screen, thereby reducing the influence of the dust on the external environment;

2. To separate the concrete from the steel bar, through the action of the primary rolling mechanism, the cutting pressure mechanism, the secondary rolling mechanism and the vibrating sieve mechanism, the construction waste is rolled, cut, and vibrating to achieve the separation of concrete and steel bars, so that Concrete and steel are separated.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the construction waste crusher;

Fig. 2 is a schematic diagram of the internal structure of the construction waste crusher;

Fig. 3 is a schematic structural view embodying the primary rolling mechanism and the cutting mechanism;

Fig. 4 embodies the structural representation of the secondary rolling mechanism and the vibrating screen mechanism;

Fig. 5 is a schematic structural view embodying the wind dust suction mechanism;

Fig. 6 is a cross-sectional view embodying the wind dust suction mechanism.

In the figure, 1, casing; 11, feed inlet; 12, discharge outlet; 13, collecting conveyor belt; 2, crushing device; 21, primary rolling mechanism; 211, first conveying roller; 2111, extrusion protrusion ; 212, the first motor; 213, the fixed frame; 214, the first extrusion roller; Three motors; 223, cutting assembly; 2231, cutting knife; 2232, second electric push rod; 23, secondary rolling mechanism; 231, secondary conveyor belt; 2311, inclined plate; 232, crushing assembly; Electric push rod; 2322, the fourth electric push rod; 2323, the first support plate; 2324, the second support plate; 2325, the second extrusion roller; 2326, the third extrusion roller; 2327, crushing protrusions; 24 , vibrating screen mechanism; 241, vibrating screen supporting plate; 2411, filter hole; 242, baffle plate; 243, spring; 244, vibrating motor; 3, dust removal device; ; 313, water pump; 314, connecting pipe; 315, hole; 32, wind suction mechanism; 321, L-shaped pipe; 322, rotating assembly; 3221, rack; 3222, gear; 3223, the seventh motor; Air duct; 324, fan; 325, filter screen; 4, primary conveyor belt.

Detailed ways

A kind of construction waste processing equipment, as shown in Figure 1 and Figure 2, includes a rectangular casing 1 supported on the ground, a rectangular feeding port 11 is opened on one side of the casing 1, and the casing 1 faces away from the feeding port 11 A rectangular discharge port 12 is opened on one side of the machine, and the casing 1 is provided with a crushing device 2 for crushing the concrete wrapped with steel bars and a dust removal device 3 for removing dust generated during the crushing. A primary conveyer belt 4 for leading construction waste to a material inlet 11 is arranged outside the casing 1 .

As shown in Figures 1 and 2, the crushing device 2 includes a primary rolling mechanism 21, a cutting mechanism 22, a secondary rolling mechanism 23, and a vibrating screen mechanism 24 (here as shown in Figure 4).

As shown in Figures 2 and 3, the primary rolling mechanism 21 includes three first conveying rollers 211 that are flush with the feed inlet 11 and rotatably connected with the inner wall of the casing 1, and drive the first conveying rollers 211 to rotate and connect with the casing 1. 1 The three first motors 212 fixedly connected, the U-shaped fixed frame 213 arranged directly above the first conveying roller 211, the first squeeze roller 214 arranged on both inner sides of the fixed frame 213 and connected to the fixed frame 213 in rotation, and The fixed frame 213 is fixedly connected and drives the second motor 215 that rotates the first extrusion roller 214, and the first electric pusher that is arranged above the fixed frame 213 and fixedly connected with the casing 1 drives the fixed frame 213 to move up and down to squeeze the reinforced concrete. Rod 216. Several extrusion protrusions 2111 are disposed on the peripheral surfaces of the first conveying roller 211 and the first extrusion roller 214 . When concrete enters on the first conveying roller 211 from the feed port 11, the first electric push rod 216 is controlled to press down so that the extruding projections 2111 of the first conveying roller 211 and the first extruding roller 214 contact the concrete, thereby The concrete is broken, and driven by the first motor 212 and the second motor 215, the concrete is transmitted to the next mechanism, and the purpose of crushing the concrete is preliminarily realized.

As shown in FIGS. 2 and 3 , the cutting and pressing mechanism 22 includes three second conveying rollers that are arranged on the side of the first conveying roller 211 away from the feed port 11 and are horizontal to the first conveying roller 211 and connected to the casing 1 in rotation. 221 , three third motors 222 fixedly connected to the casing 1 to drive the second conveying roller 221 to rotate, and a cutting assembly 223 arranged above the second conveying roller 221 for cutting concrete. The cutting assembly 223 includes a vertical cutting knife 2231 and a second electric push rod 2232 fixedly connected to the casing 1 to drive the cutting knife 2231 to cut downwards. The output shaft of the second electric push rod 2232 is fixedly connected to the cutting knife 2231 . When the concrete passed through the primary rolling mechanism 21 is transferred to the second conveying roller 221, the second electric push rod 2232 drives the cutting knife 2231 to cut the concrete, so that the concrete is cut smaller, and the falling distance of the cutting knife is limited. The surface is cut, and due to the downward pressure of the cutting knife, the concrete cracks but still adheres to the steel bars and is transferred to the next mechanism.

As shown in FIG. 2 and FIG. 4 , the secondary rolling mechanism 23 is arranged on the side of the second conveying roller 221 (here shown in FIG. 3 ) away from the first conveying roller 211 and is arranged obliquely toward the top of the casing 1. The secondary conveying belt 231 and the crushing assembly 232 arranged under the end of the secondary conveying belt 231 away from the second conveying roller 221 . Between the crushing assembly 232 and the secondary conveyor belt 231, there is a sloping plate 2311 for guiding the conveyed reinforced concrete to the crushing assembly 232, and the sloping plate is fixedly connected with the inner walls on both sides of the casing 1. The crushing assembly 232 includes a third electric push rod 2321 and a fourth electric push rod 2322 which are fixedly connected to the casing 1 and arranged horizontally opposite to each other, and a U The first support plate 2323 and the second support plate 2324 of the type, the second squeeze roller 2325 and the third squeeze roller 2326 that are rotatably connected with the two inner sidewalls of the first support plate 2323 and the second support plate 2324. Several crushing protrusions 2327 are arranged on the peripheral surfaces of the second squeezing roller 2325 and the third squeezing roller 2326 for crushing the concrete. The concrete passed through the cutting and pressing mechanism 22 is transferred to the secondary conveyor belt 231, and then falls from the end of the secondary conveyor belt 231 between the second extrusion roller 2325 and the third extrusion roller 2326, and is subjected to the action of the extrusion protrusion 2111 Squeeze the blocky concrete that sticks to the steel bar into finer pieces, separate the concrete from the steel bar, and then fall into the next mechanism.

As shown in Figures 2 and 4, the vibrating screen mechanism 24 includes a vibrating screen supporting plate 241 and a vibrating screen supporting plate 241 arranged obliquely to the discharge port 12 below the second squeezing roller 2325 and the third squeezing roller 2326. Rectangular baffle plate 242, one end is fixedly connected with the inner wall of casing 1 and the other end is fixedly connected with baffle plate 242, several springs 243 and vibrating motor 244 fixedly connected with vibrating screen supporting plate 241 are provided on both sides of the screen. Several circular filter holes 2411 are opened on the vibrating screen support plate 241 . When concrete and steel bars fall on the vibrating screen supporting plate 241, the vibration motor 244 starts to drive the construction waste on the supporting plate to vibrate, so that small pieces of concrete fall from the filter hole 2411, thereby achieving the separation of steel bars and concrete. Steel bar can take advantage of the situation to slide out from discharge port 12.

As shown in Figure 2, the casing 1 is provided with a feeding port 11 below the primary rolling mechanism 21, the cutting mechanism 22, the secondary rolling mechanism 23 and the vibrating screen mechanism 24 (here shown in Figure 4). The collection conveyor belt 13 that conveys in the direction. When the primary rolling mechanism 21, the cutting and pressing mechanism 22, the secondary rolling mechanism 23 and the vibrating sieve mechanism 24 accept the fallen concrete on the collection conveyor belt 13 through the crushing, cutting and vibrating sieve mechanism, and convey it to the feed port 11 Thereby the effect of separating concrete and steel bars is achieved. Can also be put into from feed port 11 and carry out rolling again if containing the concrete of bulk.

As shown in FIG. 1 and FIG. 2 , the dust removal device 3 includes a water washing dust reduction mechanism 31 and a wind dust suction mechanism 32 . The water-washing and dust-reducing mechanism 31 includes several rotating nozzles 311 pierced on the top of the casing 1 and pointing into the casing 1 , a water tank 312 and a water pump 313 fixedly connected to one side of the casing 1 . The rotary spray head 311 , the water tank 312 and the water pump 313 are connected through a connecting pipe 314 . When the crushing device 2 is working, the water pump 313 is started to spray the water in the water tank 312 from the rotary nozzle 311, and the water is sprayed inside the casing 1 through the rotation of the rotary nozzle 311, so that the dust and water mist are combined to flow to the machine. A circular hole 315 is opened at the bottom of the casing 1 , so that dirty water can flow out from the hole 315 .

As shown in Figures 1 and 5, the wind suction mechanism 32 includes a number of L-shaped tubes 321 pierced on both side walls of the casing 1, a rotating assembly 322 set on the peripheral surface of the L-shaped tubes 321, and a rotating assembly 322 set on the L-shaped tubes. 321, the exhaust pipe 323 that is rotatably connected to the L-shaped pipe 321, the fan 324 that is arranged in the exhaust pipe 323 and is fixedly connected with the exhaust pipe 323, and the fan 324 that is arranged at the end of the exhaust pipe 323 and is fixedly connected with the exhaust pipe 323. Filter screen 325. The rotating assembly 322 includes a rack 3221 disposed on the peripheral surface of the L-shaped tube 321 , a gear 3222 meshing with the rack 3221 , and a seventh motor 3223 fixedly connected to the housing 1 to drive the gear 3222 to rotate. When the crushing device 2 is started, a lot of dust will be generated while cutting and crushing the concrete. At this time, start the seventh motor 3223 and the fan 324 (as shown in FIG. 6 here) to make the L-shaped pipe 321 rotate in the casing 1 , increase the scope of the L-shaped pipe 321 dust suction, so that the mouth of the L-shaped pipe 321 will suck the dust, and then the clean gas will be discharged to the outside of the exhaust pipe 323 through the blocking of the filter screen 325. The rotation of the L-shaped pipe 321 can inhale the dust in a wide range, making the inhalation of the dust more efficient.

Working process: Put the construction waste on the primary conveyor belt 4 and pass it in from the feed port 11 of the casing 1, and pass through the primary rolling mechanism 21, cutting and pressing mechanism 22, secondary rolling mechanism 23 and vibrating screen mechanism 24 in sequence. Concrete containing steel bars is crushed, cut and separated, and finally the separation and recycling of concrete and steel bars are achieved. During the treatment process, the dust removal device 3 reduces the spread of dust during the work process.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (10)

1. A construction waste crusher, comprising a casing (1), one side of the casing (1) is provided with a feed inlet (11), and a crushing device (2) is arranged in the feed inlet (11), its characteristic Yes: the casing (1) is provided with a dust removal device (3) for reducing dust generated when crushing concrete, and the dust removal device (3) includes a water washing and dust reduction mechanism (31) arranged on the top of the casing (1) And the air dust suction mechanism (32) that is arranged on the inner side walls of the casing (1), the wind dust suction mechanism (32) includes several L-shaped pipes (321) that pass through the two side walls of the casing (1) ), a rotating assembly (322) arranged on the peripheral surface of the L-shaped pipe (321) for controlling the rotation of the L-shaped pipe (321), an exhaust pipe arranged outside the casing (1) and rotatably connected to the L-shaped pipe (321) (323), the blower fan (324) that is arranged in the exhaust pipe (323) and the filter screen (325) that is used to reduce dust in the exhaust pipe (323) and discharges outside the exhaust pipe (323). 2. A construction waste crusher according to claim 1, characterized in that: the water washing and dust suppression mechanism (31) includes a rotary nozzle (311), a water pump (313) and a water tank sequentially connected through a connecting pipe (314) (312), the rotary nozzle (311) is arranged on the top of the casing (1) and points to the inside of the casing (1), and is provided on the lower surface of the casing (1) for discharging holes (315) containing dust waste liquid. 3. A construction waste crusher according to claim 2, characterized in that: the rotating assembly (322) includes teeth arranged on the peripheral surface of the L-shaped pipe (321) and fixedly connected with the L-shaped pipe (321) The bar (3221), the gear (3222) matched with the rack (3221), and the second power member for driving the gear (3222) to rotate. 4. A construction waste crusher according to claim 3, characterized in that: a discharge port (12) is opened on the side of the casing (1) away from the feed inlet (11), and the casing (1) is One side of (1) is provided with a primary conveyor belt (4) leading to the feed port (11) for conveying materials, and the crushing device (2) includes a primary conveyor belt (4) which is sequentially arranged in the casing (1) to wrap the concrete primary The primary rolling mechanism (21) for rolling and crushing, the cutting and pressing mechanism (22) arranged in the casing (1) for cutting the concrete wrapped with steel bars, and the cutting and pressing mechanism (22) arranged in the casing (1) for cutting the wrapped steel bars The secondary rolling mechanism (23) for finely crushing and rolling the concrete and the vibrating screen mechanism (24) arranged in the casing (1) for separating the remaining concrete and steel bars. 5. A construction waste crusher according to claim 4, characterized in that: the primary rolling mechanism (21) includes a roller that is flush with the feed inlet (11) and rotatably connected with the inner wall of the casing (1). The first conveying roller (211), the first driving member that is fixedly connected with the casing (1) and drives the first conveying roller (211) to rotate, and the first squeeze roller ( 214) and the second driving member that drives the first squeeze roller (214) and the first power member that is fixedly connected with the casing (1) to drive the first squeeze roller (214) to squeeze the concrete that wraps the steel bar. The first extrusion roller (214) is provided with an extrusion protrusion (2111) for conveniently crushing the concrete wrapped with the steel bar. 6. The construction waste crusher according to claim 5, characterized in that: the cutting and pressing mechanism (22) includes a side of the first conveying roller (211) away from the feed port (11) and a second A conveying roller (211) is horizontal and a plurality of second conveying rollers (221) that are rotationally connected with the casing (1), a second driving member that drives the second conveying roller (221) to rotate, and a second driving member that is arranged on the second conveying roller (221) ) above the cutting assembly (223) for chopping the concrete encasing the rebar. 7. The construction waste crusher according to claim 6, characterized in that: the cutting assembly (223) includes a cutting knife (2231) arranged vertically above the second conveying roller (221) and a drive cutting Knife (2231) presses down the second power part that the concrete that wraps steel bar is chopped. 8. A construction waste shredder according to claim 7, characterized in that: the secondary rolling mechanism (23) includes a second conveying roller (221) away from the first conveying roller (211). The secondary conveyor belt (231) arranged obliquely to the top of the casing (1) is arranged on the crushing assembly (232) below the end of the secondary conveyor belt (231) away from the second conveyor roller (221). 9. The construction waste crusher according to claim 8, characterized in that: the crushing assembly (232) includes a first support plate (2323) and a second support plate (2324) arranged horizontally and separated by a certain gap , the second squeeze roller (2325) and the third squeeze roller (2326) that are rotationally connected with the first support plate (2323) and the second support plate (2324), drive the second squeeze roller (2325) and the third squeeze roller (2325) Squeeze roller (2326) to second squeeze roller (2325) and the 3rd drive member that the 3rd squeeze roller (2326) middle part rotates and the 4th drive member and drives the 2nd squeeze roller (2325) and the 3rd squeeze The pressing roller (2326) is the third power part and the fourth power part moving in opposite directions. 10. A construction waste crusher according to claim 9, characterized in that: the vibrating sieve mechanism (24) is arranged below the secondary rolling mechanism (23) and inclined to the discharge port (12). The vibrating screen supporting plate (241), several filter holes (2411) opened on the vibrating screen supporting plate (241), several elastic parts fixedly connecting the vibrating screen supporting plate (241) and the casing (1), A vibration motor (244) that drives the vibrating screen supporting plate (241) to vibrate.