Construction waste recycled aggregate preparation system

Abstract

The utility model provides a construction waste recycled aggregate preparation system which comprises a crawling ladder type conveying belt, a jaw crusher, a washing screening belt, a vibration conveying belt, an impact crusher and a centrifugal screening machine which are sequentially arranged, so that wastes are lifted by the crawling ladder type conveying belt to the jaw crusher to be preliminarily crushed into crushed particles; the crushed particles are washed by a washing screening belt, are conveyed to a vibration conveying belt to be subjected to iron removal treatment after being treated, are crushed by an impact crusher and are screened by a centrifugal screening machine; the crawling ladder type conveying belt conveys waste through the conveying crawler belts, climbing steps are arranged between the upper conveying crawler belt and the lower conveying crawler belt, and step blocking feet are arranged on the edges of the climbing steps. The particle size of a product is accurately controlled, the quality of the finished product is improved, and the production efficiency is improved. And raised dust and noise pollution in the construction process are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of construction waste recycling, especially to a construction waste recycled aggregate preparation system. BACKGROUND

[0002] With the acceleration of urbanization, the amount of construction waste is increasing. It is estimated that the amount of construction waste generated globally each year is huge, and the amount of construction waste generated in China each year is as high as several hundred million tons. If these wastes are not properly handled, they will occupy a large amount of land, pollute the environment, and affect the ecological balance. With the increasing depletion of natural resources, the supply of high-quality natural aggregates (such as river sand, pebbles, and gravel) is becoming increasingly scarce, leading to rising construction costs. At the same time, large-scale exploitation of natural aggregates will also damage the natural landscape and ecological environment. Converting construction waste into recycled aggregate has many benefits, including environmental protection, resource conservation, economic benefits, improved engineering quality, policy support, social impact, technological innovation, and sustainable development. These benefits make construction waste resource utilization an important way to solve the problem of construction waste disposal and have important significance for promoting the sustainable development of the construction industry.

[0003] Although existing recycled aggregate preparation systems have made some progress in construction waste resource utilization, there are still some shortcomings. These shortcomings not only affect the efficiency and product quality of the system, but also limit its application in a wider range. Many existing systems only use a single crushing device, such as a jaw crusher or an impact crusher, which cannot achieve multi-stage crushing, resulting in low crushing efficiency. The crushing ratio of a single crushing device is limited, making it difficult to crush construction waste to the desired small particle size, affecting the effectiveness of subsequent processing. The screen of the existing screening device is easily clogged by fine dust and soil, affecting the screening effect. Many systems lack multi-stage screening equipment, which cannot accurately separate recycled aggregates of different particle sizes, resulting in uneven particle size distribution. Many existing systems rely on manual operation, lack of automation and intelligent control, resulting in low production efficiency and increased human error. Lack of effective data management system, unable to record and analyze various data in the production process in real time, difficult to realize whole process quality traceability. SUMMARY

[0004] The utility model aims at providing a construction waste recycled aggregate preparation system that solves the above technical problems.

[0005] In order to solve the above technical problems, the utility model provides a kind of construction waste recycled aggregate preparation system, including the ladder transmission belt that is sequentially arranged, jaw crusher, water washing screening belt, vibration transmission belt, impact crusher and centrifugal screening machine, to make the ladder transmission belt lift waste to be initially crushed into granules by jaw crusher, granule is washed and is handled by water washing screening belt, and granule is sent to vibration transmission belt to be treated by removing iron, and is broken by impact crusher and is screened by centrifugal screening machine;The ladder transmission belt transports waste by transmission track, and there is climbing ladder between upper and lower two transmission tracks, and ladder edge is equipped with ladder foot stop.

[0006] Further, the jaw crusher includes jaw crusher engine, rolling plate, jaw crusher engine is rotated by transmission belt, swing arm is sleeved on runner, and reinforcing rib is arranged on swing arm;Connecting link and reciprocating spring are connected below swing arm, so that swing arm reciprocates when machine operates;Rolling plate is arranged on swing arm and fixed plate, and fixed plate is fixed on jaw crusher on one side.

[0007] Further, one end of adjusting rod is connected with swing arm, and the other end of adjusting rod is equipped with sliding block, and sliding block is fixed by adjusting rivet;Dust cover, air blower and water mist spray head are arranged at the top inlet of jaw crusher.

[0008] Further, rolling rib and rolling point are arranged on rolling plate.

[0009] Further, vibration transmission belt bottom has support seat, and vibration transmission belt surface is paved with screening belt;Vibration spring is arranged at the bottom of screening belt, so that material jumps on screening belt;Permanent magnet iron remover is rotatably arranged on the upper part of screening belt.

[0010] Further, the permanent magnet iron remover includes fixed frame and permanent magnet source, the fixed frame is supported on the vibration transmission belt, the permanent magnet source is fixed on the fixed frame, the outer ring of the permanent magnet source is sleeved with rubber separation belt, and the large roller and the small roller are rotatably arranged on the inner side of the rubber separation belt;A plurality of screening bars are arranged at intervals on the outer periphery of the rubber separation belt.

[0011] Further, the impact crusher includes rotor and impact hammer, the rotor is rotatably arranged, the rotating drum is sleeved on the rotor, and the impact hammer is fixed on the rotating drum;The inlet of the impact crusher is provided with an iron curtain;The inner side of the impact crusher is circumferentially provided with baffle A, baffle B, impact plate A, impact plate B and impact plate C;Baffle A and baffle B are fixed by screw, impact plate A, impact plate B and impact plate C are connected with the impact crusher by adjusting hinge;Impact spring is arranged between the impact plate and the inner wall of the impact crusher for driving the impact plate to jump.

[0012] Further, the centrifugal screening machine is fixed through the bearing platform base, a centrifugal screening machine motor in the centrifugal screening machine drives gear rotation, so that the transmission shaft reciprocating rotation, the centrifugal screening machine inside one side lays 5mm screen, and the centrifugal screening machine discharge port is placed 10mm screen.

[0013] The utility model discloses the beneficial effect lies in:

[0014] 1. Through multiple crushing, gradually crushing construction waste into the required particle size, improving the crushing efficiency. Multiple crushing can reduce the mis-screening phenomenon, improve the screening efficiency, and ensure that each particle size of aggregate can be effectively separated. During the multiple crushing process, fine dust, soil and other impurities can be removed through screening and cleaning equipment, improving the purity of recycled aggregate. Through multiple crushing, the crushing ratio of each step can be optimized, and energy consumption can be reduced. Through multiple crushing, the load of a single device can be reduced, the excessive wear of the device can be reduced, and the service life of the device can be prolonged.

[0015] 2. The magnetic attraction screening technology can efficiently remove iron impurities such as steel bars, nails and iron sheets in construction waste, ensuring the purity of recycled aggregate. The magnetic attraction screening equipment can realize continuous production, reduce the intermediate downtime, and improve the overall production efficiency. Reducing the production of unqualified products, reducing the need for rework and reprocessing, saving time and cost. Removing iron impurities can reduce the wear of subsequent processing equipment (such as crushers, screening machines, etc.), prolonging the service life of the equipment.

[0016] 3. The centrifugal screening machine accurately controls the particle size of the aggregate, ensuring that each particle size of the aggregate can be effectively separated. The final production of recycled aggregate has consistent particle size, which is beneficial to improve its application effect in engineering. The centrifugal control diameter equipment can realize continuous production, reduce the intermediate downtime, and improve the overall production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the operation process of the construction waste recycled aggregate preparation system;

[0018] Figure 2 is a schematic diagram of the crawling ladder type conveying belt;

[0019] Figure 3 is a schematic diagram of the jaw crusher;

[0020] Figure 4 is a schematic diagram of the rolling plate;

[0021] Figure 5 is a schematic diagram of the vibrating conveying belt;

[0022] Figure 6 is a schematic diagram of the permanent magnet iron remover;

[0023] Figure 7is a schematic view of a counter-attack crusher;

[0024] Figure 8 is a schematic view of a centrifugal screening machine;

[0025] Figure 9 is a construction flow chart of a construction waste recycled aggregate preparation system;

[0026] BRIEF DESCRIPTION OF DRAWINGS 1 - muck truck; 2 - ladder type conveying belt; 3 - jaw crusher; 4 - water washing and screening belt; 5 - vibrating conveying belt; 6 - counter-attack crusher; 7 - centrifugal screening machine; 8 - truck; 9 - construction pile cap; 10 - inclined support; 11 - high-pressure water gun; 12 - drainage net; 13 - air blower; 14 - sprayer; 15 - conveying track; 16 - climbing ladder; 17 - ladder foot stop; 18 - dust cover; 19 - water mist nozzle; 20 - air blower; 21 - rolling plate; 22 - fixing bolt; 23 - fixing plate; 24 - fixing screw; 25 - limiting screw; 26 - jaw crusher discharge port; 27 - swing arm; 28 - reinforcing rib; 29 - connecting rod; 30 - reciprocating spring; 31 - adjusting rod; 32 - sliding block; 33 - adjusting rivet; 34 - runner; 35 - transmission belt; 36 - jaw crusher engine; 37 - emergency brake button; 38 - rolling point; 39 - rolling rib; 40 - permanent magnet iron remover; 41 - vibrating spring; 42 - screening belt; 43 - support seat; 44 - rubber separation belt; 45 - screening strip; 46 - large roller; 47 - permanent magnet source; 48 - high-strength bolt; 49 - fixing frame; 50 - small roller; 51 - cover plate; 52 - screen plate; 53 - 10 mm screen; 54 - powder discharge port; 55 - transmission shaft; 56 - eccentric rod; 57 - gear; 58 - centrifugal screening machine motor; 59 - centrifugal block; 60 - slag discharge port; 61 - humidifier; 62 - 5 mm screen; 63 - pile cap base; 64 - counter-attack crusher motor; 65 - iron curtain; 66 - counter-attack plate A; 67 - impact spring; 68 - crushing tooth; 69 - hydraulic pump; 70 - adjusting hinge; 71 - counter-attack plate B; 72 - impact hammer; 73 - heating plate; 74 - baffle A; 75 - screw; 76 - baffle B; 77 - rotor; 78 - rotating drum; 79 - counter-attack crusher discharge port; 80 - counter-attack plate C. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0028] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

[0029] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0030] As Figures 1-9 The utility model provides a kind of construction waste recycled aggregate preparation system, as Figure 1 As shown in the figure, the overall construction process is that slag car 1 transports waste into field, ladder climbing conveying belt 2 lifts waste to construction platform 9, and enters into jaw crusher 3 preliminary crushing. Broken particle is washed and selected by water washing screen 4, and is washed and treated using high-pressure water gun 11, and waste water and waste residue are discharged through drainage net 12. Broken particle is sent to vibration conveying belt 5 for iron removal treatment after being treated, and is sent to construction platform 9 again after treatment, and is broken by impact crusher 6, and construction platform 9 is provided with inclined brace 10 to ensure that platform is stable when crusher works. Broken particle is sent to centrifugal screening machine 7 for screening after being broken, and the product is transported away by truck 8 after being qualified by quality inspection.

[0031] As Figure 2 As shown in the figure, ladder climbing conveying belt 2 transports waste by conveying track 15, and there is climbing ladder 16 between upper and lower conveying tracks 15, and climbing ladder 16 drives waste to rise when climbing, and ladder foot stop 17 is arranged at the edge of climbing ladder 16 to prevent waste from falling during lifting process. Blower 13 is used to direct blowing and raising dust during conveying, and sprayer 14 is used to spray water mist on conveying belt to prevent dust from spreading.

[0032] As Figure 3As shown, the jaw crusher 3 includes jaw crusher engine 36, crushing plate 21, jaw crusher engine 36 through the transmission belt 35 driven rotating wheel 34, jaw crusher engine 36 is provided with emergency brake button 37, when the dangerous situation, timely shut down the machine. The swing arm 27 set on the rotating wheel 34, swing arm 27 is provided with reinforcing rib 28. Swing arm 27 below the connecting rod 29 and reciprocating spring 30, so that in the machine operation, swing arm 27 do reciprocating vibration. The jaw crusher 3 through the swing arm 27 on the crushing plate 21 and fixed plate 23 on the crushing plate 21 of the waste crushing, crushing plate 21 are connected by fixed bolt 22. Fixed plate 23 side through the fixed screw 24 and limit screw 25 fixed on the machine, ensure that the fixed plate 23 will not move when crushing. The adjusting rod 31 one end connecting swing arm 27, adjusting rod 31 the other end is provided with sliding block 32, by adjusting the sliding block 32 position to control the angle of swing arm 27. According to the design requirements to determine the appropriate discharge width, with the adjusting rivet 33 fixed sliding block 32. The top inlet has dust cover 18, blower 20 and water mist nozzle 19, for reducing dust. After the waste is crushed, the crushed particles fall through the jaw crusher discharge port 26.

[0033] As shown in the figure, Figure 4 The jaw crusher 3 crushing plate 21 can be replaced according to the wear condition, the crushing plate 21 is provided with crushing rib 39 and crushing point 38, improve the crushing efficiency.

[0034] As shown in the figure, Figure 5 The waste is crushed in the jaw crusher 3, sent to the vibrating conveyor belt 5 screening. The vibrating conveyor belt 5 is supported by support seat 43, the surface is paved with screening belt 42; the bottom of the screening belt 42 is provided with the vibrating spring 41, so that the material jumps on the screening belt 42, uniform screening. The upper part of the screening belt 42 is provided with the permanent magnet iron remover 40, which rotates continuously and emits magnetic force to attract the metal in the waste.

[0035] As shown in the figure, Figure 6 The permanent magnet iron remover 40 includes fixed frame 49 and permanent magnet source 47, the fixed frame 49 is supported on the vibrating conveyor belt 5, the permanent magnet source 47 is fixed on the fixed frame 49 through high strength bolt 48, the outer circle of the permanent magnet source 47 is sleeved with rubber isolation belt 44, under the rotation of the large roller 46 and the small roller 50, the rubber isolation belt 44 rotates continuously. The high performance neodymium iron boron magnetic force in the permanent magnet source 47 is very strong, when the waste particles pass through the vibrating conveyor belt 5 under the permanent magnet iron remover 40, the metal substances are attracted by the magnetic force on the rubber isolation belt 44, and the metal substances are driven to rotate to the both sides of the permanent magnet iron remover 40 by the several screening strips 45 arranged at intervals on the rubber isolation belt 44, and the metal substances lose the magnetic force and fall off naturally after moving away from the permanent magnet source 47. In order to ensure the efficiency of iron removal, a plurality of permanent magnet iron removers 40 are arranged at intervals on the vibrating conveyor belt 5 to ensure complete screening.

[0036] As Figure 7 The motor 64 of the impact crusher includes a rotor 77, an impact hammer 72, the rotor 77 is rotationally arranged, a rotating drum 78 is sleeved on the rotor 77, and the impact hammer 72 is fixed on the rotating drum 78 to crush the waste. An iron curtain 65 is arranged at the feeding port of the motor 64 of the impact crusher, so that the flying of the broken particles during crushing can be prevented. In order to prevent the block material from being too wet and adhering to the wall of the crusher during crushing, a heating plate 73 of the feeding slot can be opened to heat the material. The particle size of the discharged material in the impact crusher 6 is controlled through a baffle A 74, a baffle B 76, a counterattack plate A 66, a counterattack plate B 71 and a counterattack plate C 80. The baffle A 74 and the baffle B 76 are fixed through a screw 75, and the counterattack plate A 66, the counterattack plate B 71 and the counterattack plate C 80 are connected with the machine through an adjusting hinge 70. The particle size of the discharged material of the impact crusher can be adjusted by replacing baffles with different thicknesses and adjusting the angles of the counterattack plates. After the angle of the counterattack plate is adjusted, a hydraulic pump is used to apply force to the counterattack plate, so that the counterattack plate is prevented from loosening during the crushing process. After the angle of the counterattack plate is adjusted, a hydraulic pump 69 is used to apply force to the counterattack plate, so that the counterattack plate is prevented from loosening during the crushing process. The impact spring 67 drives the counterattack plate to jump during crushing, so that the crushing efficiency is improved. The design of the crushing teeth 68 on the baffle and the counterattack plate can better crush hard objects.

[0037] As Figure 8 The centrifugal screening machine 7 is fixed on the ground through the bearing platform base 63 to prevent the centrifugal screening machine 7 from tilting during operation. The centrifugal screening machine motor 58 drives the gear 57 to drive the transmission shaft 55 to rotate back and forth, and the bottom centrifugal block 59 and the eccentric rod 56 make the machine vibrate in a centrifugal manner. Under the action of the centrifugal force, the particles are uniformly dispersed and scattered to the surroundings. The centrifugal screening machine is paved with a 5mm screen 62, and a 10mm screen 53 is placed at the discharge port. The ash with a particle size less than 5mm falls from the 5mm screen 62 and falls from the slag discharge port 60 to be abandoned. The particles with a particle size of 5mm-10mm are screened out through the 10mm screen 53 and are output from the powder outlet 54 and are collected and stored. The screen plate 52 can be rotated during powder screening, so that the powder screening rate is improved.

[0038] As Figure 9 The building waste recycled aggregate preparation system in the utility model can be used through the following steps:

[0039] Step one, waste feeding: building waste is collected and transported into the field, the building waste is unloaded from the slag truck 1, placed on the ladder type conveying belt 2, and fed into the production line.

[0040] At the construction site or demolition site, construction waste is classified and collected, and the classified and collected construction waste is marked with the category and source. The construction waste is transported to the production site by the muck truck 1, the waste is placed on the ladder-type conveying belt 2, and the ladder-type conveying belt 2 is started to lift the construction waste to the height of the jaw crusher 3 feeding port. The dust is blown and raised by the blower 13 during the conveying process, and the conveying belt is sprayed with water mist by the sprayer 14 to prevent dust diffusion.

[0041] Step two, adjusting the jaw crusher discharge port: according to the design requirements and the size of the construction waste, the width of the jaw crusher discharge port 26 is adjusted.

[0042] Before starting the jaw crusher engine 36, the jaw crusher 3 discharge particle size needs to be adjusted. The adjusting rod 31 in the jaw crusher 3 is connected to the swing arm 32, and the other end of the adjusting rod 31 is provided with a sliding block 32. The angle of the swing arm 32 is controlled by adjusting the position of the sliding block 32. After the appropriate discharge width is determined according to the design requirements, the sliding block 32 is fixed with the adjusting rivet 33. Finally, the jaw crusher discharge port 26 is adjusted, and the crushing is ready to start.

[0043] Step three, jaw crusher crushing: the construction waste is conveyed by the ladder-type conveying belt 2 and sent into the jaw crusher 3 to start crushing.

[0044] A comprehensive equipment inspection is conducted to ensure that all parts are in good condition, fasteners are tightened in place, and the lubrication system is operating normally. It is confirmed that there is no foreign matter in the crushing cavity and the feeding port is unobstructed. Start the jaw crusher engine 36, and the waste is uniformly sent into the feeding port of the jaw crusher 3 to avoid feeding too much material at once to avoid overloading the equipment. During the crushing process, the dust cover 18 is opened, the blower 20 and the water mist nozzle are opened, which can reduce the temperature of the machine during operation and maintain the humidity of the waste to reduce the wear of the crusher. Most importantly, it can effectively prevent dust flying and protect the construction environment. When an emergency occurs, the emergency brake button 37 should be pressed in time to shut down the machine. The crushed waste is discharged from the jaw crusher discharge port 26 and enters the next process.

[0045] The crushing plate 21 of the jaw crusher 3 can be disassembled and replaced according to the wear condition, and the crushing plate 21 is provided with crushing ribs 39 and crushing points 38 to improve the crushing efficiency.

[0046] Step four, particle washing and screening: the waste particles are preliminarily screened, the initially crushed waste is sent to the water washing and screening belt 4 for high-pressure water gun 11 washing and drying and screening.

[0047] The primary broken particles are sent to the water washing and screening belt 4, and the water pump is turned on to flush the particles by the high-pressure water gun 11. During the flushing process, the construction personnel use a shovel and a rake to turn over the particles to ensure that the particles are completely flushed in place. According to the characteristics of the material and the water washing effect, the intensity and direction of the water flow are appropriately adjusted to ensure that the fine dust and soil are completely flushed away. The drainage net 12 on the water washing and screening belt 4 can drain the flushing wastewater and filter the impurities flushed out. The treated wastewater can be recycled to reduce water waste. The cleaned recycled aggregate is collected in a designated storage area, dried with a hot air blower, and manually screened. The oversized particles are re-fed into the jaw crusher 3 for further crushing, and the qualified particles are subjected to the next iron removal.

[0048] Step five, magnetic iron removal: The preliminarily screened particles are sent to the vibrating transmission belt 5 for screening by the permanent magnet iron remover 40 to remove metal substances.

[0049] The cleaned and screened particles are fed into the vibrating transmission belt 5, which combines with the permanent magnet iron remover 40 to remove impurities and metal such as steel bars in the waste. The vibrating spring 41 drives the screening belt 42 to jump, allowing the permanent magnet iron remover 40 to more efficiently remove metal. The collected iron can be recycled after treatment.

[0050] When the permanent magnet iron remover 40 is working, the fixed frame 49 is supported on the vibrating transmission belt 5, the permanent magnet source 47 is fixed on the fixed frame 49 by high-strength bolts 48, the rubber isolation belt 44 is sleeved on the outer circle of the permanent magnet source 47, and the rubber isolation belt 44 keeps rotating under the rotation of the large roller 46 and the small roller 50. The high-performance neodymium iron boron magnetic force in the permanent magnet source 47 is very strong. When the waste particles pass through the permanent magnet iron remover 40 below the rotating transmission belt 5, the metal substances are attracted by the magnetic force and attached to the rubber isolation belt 44. The screening strip 45 drives the attached metal substances to rotate to the sides of the permanent magnet iron remover 40, away from the permanent magnet source 47, and the metal substances naturally fall off. To ensure the efficiency of iron removal, multiple permanent magnet iron removers 40 are arranged on the vibrating transmission belt 5 to ensure complete screening.

[0051] Step six, adjusting the discharge port of the impact crusher: adjust the size of the discharge port 79 of the impact crusher according to the design requirements and product needs.

[0052] Before starting the impact crusher motor 64, the need to adjust the impact crusher 6 discharge particle size. Impact crusher 6 in the discharge particle size by the baffle A 74, baffle B 76, the impact plate A 66, the impact plate B 71, the impact plate C 80 control. Baffle A 74, baffle B 76 by the screw 75 fixed, the impact plate A 66, the impact plate B 71, the impact plate C 80 by adjusting the hinge 70 and machine connection. By changing the thickness of the baffle and adjusting the angle of the impact plate can adjust the impact crusher 6 out of the diameter of the particle size. After adjusting the angle of the impact plate can be completed by the hydraulic pump 69 to the impact plate exert force, to avoid the impact plate loose in the crushing process. After the completion of the debugging, you can start to feed the crushing.

[0053] Step seven, impact crusher crushing: the initial crushing of waste into the impact crusher 6, for the second crushing.

[0054] Open the impact crusher motor 64, the machine rotates after the uniform from the feeding port. Impact spring 67 driven impact plate jump, improve the crushing efficiency, while the baffle and impact plate on the design of the crushing teeth can better crush the hard. In order to prevent the input block too wet in the crusher wall sticky, can open the inlet slot heating plate 73 on the material heating. In the process of crushing need to pay attention to the health of each baffle, impact plate and impact hammer 72, components should be replaced in time when fatigue. After the completion of the crushing of the granules from the impact crusher discharge port 79 output, for collection and storage, ready to enter the screening stage.

[0055] Step eight, centrifugal screening: the collection of two rounds of crushing of the granules, into the centrifugal screen 7, for the particle size control of recycled aggregate.

[0056] Screening before the pile cap base 63 fixed on the ground, the two crushing of the granules into the centrifugal screen 7, open the centrifugal screen motor 58, the motor driven gear 57 drive shaft 55 reciprocating rotation, the bottom of the centrifugal block 59 and eccentric rod 56 make the machine centrifugal vibration. Under the action of centrifugal force, the particles are evenly dispersed to the four corners. Particle size less than 5mm from the 5mm screen 62, for abandoned. Particle size in 5mm-10mm particles through 10mm screen 53, from the powder outlet 54 output, collection and storage. The remaining oversized block in the centrifugal screen 7 re-enter the impact crusher 6 crushing. In the powder can rotate the screen 52, improve the screening rate. Machine operation, close the top cover 51, and open the humidifier 61, on the one hand can reduce the dust, on the other hand can reduce the noise of the machine operation, is conducive to the health of the site construction personnel.

[0057] Step nine, product transportation: construction waste after reprocessing and processing, the finished product through the truck 8 out of the factory.

[0058] After screening is completed, the output particle size of all the aggregates is 5mm-10mm, and the product is subjected to quality detection such as particle size distribution, density, water absorption rate, etc. The product that passes the quality inspection is stored in a flat, solid and dry place, and is transported to the designated location in batches by a truck 8.

[0059] The present application adopts double repeated crushing technology, which gradually crushes construction waste into the required particle size through multiple crushing, improving the crushing efficiency. Multiple crushing can reduce the mis-screening phenomenon, improve the screening efficiency, and ensure that aggregates of each particle size can be effectively separated. During the multiple crushing process, fine dust, soil and other impurities can be removed through screening and cleaning equipment, improving the purity of recycled aggregates. Through multiple crushing, the crushing ratio of each step can be optimized, reducing energy consumption. Through multiple crushing, the load of individual equipment can be reduced, reducing excessive wear and tear of equipment and prolonging the service life of equipment.

[0060] The present application adopts dynamic adjustment of out-diameter size crushing technology, which can realize continuous production, reduce intermediate downtime, and improve overall production efficiency. Precise crushing and screening reduce the production of unqualified products, reduce the need for rework and reprocessing, save time and cost. The design of the multi-stage system makes it easier to maintain each device, and regular inspection and maintenance can timely discover and solve problems, prolonging the service life of the equipment.

[0061] The present application adopts magnetic attraction screening and iron removal technology, which can efficiently remove iron impurities such as steel bars, nails, and iron sheets from construction waste, ensuring the purity of recycled aggregates. The magnetic attraction screening equipment can realize continuous production, reduce intermediate downtime, and improve overall production efficiency. Reducing the production of unqualified products, reducing the need for rework and reprocessing, saving time and cost. Removing iron impurities can reduce the wear and tear of subsequent processing equipment (such as crushers, screeners, etc.), prolonging the service life of the equipment.

[0062] The present application adopts centrifugal size control technology, which precisely controls the particle size of aggregates through the action of centrifugal force, ensuring that aggregates of each particle size can be effectively separated. The final production of recycled aggregates has consistent particle size, which is beneficial to improve its application effect in engineering. The centrifugal size control equipment can realize continuous production, reduce intermediate downtime, and improve overall production efficiency.

[0063] The present application adopts the spray dust-settling environment-friendly technology, captures and settles dust in the air by spraying fine water mist particles and directional blowing air at each production stage, effectively reduces the flying of dust, can cover the whole operation area, ensures all-around dust-settling, and improves the dust-settling effect. The water source used in the spray dust-settling technology can be recycled water, reduces the consumption of fresh water resources, and is more environment-friendly. Reducing dust pollution can improve the comfort of the working environment and reduce the occurrence of occupational diseases. Through effective dust-settling, the equipment failure and downtime caused by dust pollution are reduced, the production efficiency is improved, and the sustainable development of building waste resource utilization is promoted.

[0064] The utility model is not limited to the above-mentioned best implementation, and anyone can draw other various forms of products under the enlightenment of the utility model, but no matter make any change in its shape or structure, all have the same or similar technical scheme with the application, fall in the protection scope of the utility model.

Claims

1. A construction waste recycled aggregate production system, characterized by: The utility model provides a waste recycling device, including the ladder type conveying belt (2) that sets gradually, jaw crusher (3), water washing screening belt (4), vibration conveying belt (5), impact crusher (6) and centrifugal screening machine (7), so that the ladder type conveying belt (2) lifts the waste to the jaw crusher (3) and is initially crushed into the broken particle, and the broken particle is washed and treated through the water washing screening belt (4), and the broken particle is sent to the vibration conveying belt (5) and is treated to remove iron, and is crushed by the impact crusher (6) and is screened by the centrifugal screening machine (7), the ladder type conveying belt (2) transports the waste through the transmission track (15), and the transmission track (15) between the upper and lower transmission track (15) has the climbing ladder (16), and the edge of the climbing ladder (16) is equipped with the ladder foot stop (17).

2. The construction waste recycled aggregate preparation system according to claim 1, characterized in that: The jaw crusher (3) includes jaw crusher engine (36), and the rolling plate (21), the jaw crusher engine (36) rotates the runner (34) through the transmission belt (35), the swing arm (27) is sleeved on the runner (34), and the swing arm (27) is provided with the reinforcing rib (28); the swing arm (27) is connected with the connecting rod (29) and the reciprocating spring (30) below, so that the swing arm (27) does reciprocating vibration when the machine is operated; the swing arm (27) and the fixed plate (23) are provided with the rolling plate (21), and one side of the fixed plate (23) is fixed on the jaw crusher (3).

3. The construction waste recycled aggregate preparation system according to claim 2, characterized in that: The adjusting rod (31) one end is connected with the swing arm (27), and the adjusting rod (31) other end is equipped with the sliding block (32), and the sliding block (32) is fixed through the adjusting rivet (33); the top inlet of the jaw crusher (3) has the dust cover (18), the air blower (20) and the water mist sprayer (19).

4. The construction waste recycled aggregate preparation system according to claim 2, characterized in that: The rolling plate (21) is provided with the rolling rib (39) and the rolling point (38).

5. The construction waste recycled aggregate preparation system according to claim 1, characterized in that: The vibration conveying belt (5) bottom has the support seat (43), and the vibration conveying belt (5) surface is paved with the screening belt (42); the screening belt (42) bottom is provided with the vibration spring (41) and makes the material jump on the screening belt (42); the upper portion of the screening belt (42) is rotatably provided with the permanent magnet iron remover (40).

6. The construction waste recycled aggregate preparation system according to claim 5, characterized in that: The permanent magnet iron remover (40) includes a fixed frame (49) and a permanent magnet source (47), the fixed frame (49) is supported on the vibration conveying belt (5), the permanent magnet source (47) is fixed on the fixed frame (49), the permanent magnet source (47) is sleeved with a rubber isolation belt (44) outside, and a large roller (46) and a small roller (50) are rotatably arranged inside the rubber isolation belt (44); a plurality of screening strips (45) are arranged at intervals on the outer periphery of the rubber isolation belt (44).

7. The construction waste recycled aggregate preparation system according to claim 1, characterized in that: The counterattack crusher (6) includes a rotor (77) and impact hammers (72), the rotor (77) is rotationally arranged, a rotating drum (78) is sleeved on the rotor (77), the impact hammers (72) are fixed on the rotating drum (78), and an iron curtain (65) is arranged at a feeding port of the counterattack crusher (6); a plurality of baffles A (74), baffles B (76), counterattack plates A (66), counterattack plates B (71) and counterattack plates C (80) are circumferentially arranged on the inner side of the counterattack crusher (6); the baffles A (74) and the baffles B (76) are fixed by means of rotating nails (75), and the counterattack plates A (66), the counterattack plates B (71) and the counterattack plates C (80) are connected with the counterattack crusher (6) by means of adjusting hinges (70); impact springs (67) are arranged between the counterattack plates and the inner wall of the counterattack crusher (6) and are used to drive the counterattack plates to jump.

8. The construction waste recycled aggregate preparation system according to claim 1, characterized in that: The centrifugal screening machine (7) is fixed by means of a bearing platform base (63), a centrifugal screening machine motor (58) in the centrifugal screening machine (7) drives a gear (57) to rotate, so that a transmission shaft (55) reciprocatingly rotates, 5mm screen meshes (62) are arranged on one side in the centrifugal screening machine (7), and 10mm screen meshes (53) are arranged at a discharging port of the centrifugal screening machine.

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