CN114570653A

CN114570653A - Granularity intelligence screening conveyor is used in recycled concrete production

Info

Publication number: CN114570653A
Application number: CN202210491521.6A
Authority: CN
Inventors: 刘忠超; 崔景勇; 赵振
Original assignee: Xuzhou Sanhe Xincheng New Building Materials Co ltd
Current assignee: Xuzhou Shiwei Longsheng Construction Engineering Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-06-03
Anticipated expiration: 2042-05-07
Also published as: CN114570653B

Abstract

The invention discloses a granularity intelligent screening and conveying device for recycled concrete production, which comprises a supporting device, a power device, a material distribution device and a grading device, wherein the supporting device is movably connected with the power device, the power device is connected with the material distribution device, the material distribution device is fixedly connected with the supporting device, the power device is communicated with a pipeline of the grading device, the grading device is fixedly connected with the supporting device, the supporting device comprises a guide seat, supports are arranged on two sides of the guide seat, the power device comprises a conveying belt, the conveying belt is in sliding connection with the guide seat, thick and thin aggregates are intelligently screened through the power device, the strength of concrete aggregates is automatically distinguished through the material distribution device, the conveying quantity of the thick and thin aggregates is monitored in real time through the grading device, the grading uniformity is improved, and the conveying quality of the concrete is improved through screening on the conveying device.

Description

Granularity intelligence screening conveyor is used in recycled concrete production

Technical Field

The invention relates to the technical field of intelligent screening and conveying devices, in particular to a granularity intelligent screening and conveying device for recycled concrete production.

Background

In recent years, along with the continuous development of economy, urban and rural scales are continuously enlarged, and in order to meet development requirements, the building area is continuously increased, and the use amount of natural sandstone is increased. In order to reduce the cost and the exploitation of natural gravels, more and more building projects adopt recycled concrete aggregate as coarse and fine aggregate for repeated use. Through carrying out breakage, screening to the concrete, carry out the gradation again, need carry different stations with the concrete through conveyor, present conveyor mostly can only carry, and the function is comparatively single, can't carry out intelligent screening, because the concrete quality is great, can not carry out high-speed transmission in the transportation, has influenced multistation machining efficiency.

Concrete after the breakage need sieve, and most screening plant sieves through the filter plate, and screening efficiency is lower, still blocks up the sieve mesh easily, through mechanical system, carries out vibration screening, and the noise is big, and is inefficient. When the concrete is broken, the concrete can crack in multiple seams, the cracking is uneven, the concrete is cracked into aggregates with different granularities, local stress concentration is easily caused, and after stress is released, the concrete is cracked easily, the regeneration quality is influenced, and intelligent screening can not be performed according to the aggregate strength of the thick and thin materials.

In addition, when concrete grading is carried out, intelligent monitoring can not be carried out according to the feeding amount of coarse aggregates and fine aggregates, real-time proportion grading is carried out, the feeding proportion is adjusted, and the grading quality is influenced.

Disclosure of Invention

The invention aims to provide an intelligent granularity screening and conveying device for recycled concrete production, which aims to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides a recycled concrete production is with granularity intelligence screening conveyor, includes strutting arrangement, power device, feed divider and level and joins in marriage the device, strutting arrangement and power device swing joint, power device and feed divider are connected, feed divider and strutting arrangement fastening connection, power device and level join in marriage device pipeline intercommunication, level join in marriage device and strutting arrangement fastening connection, strutting arrangement includes the guide holder, the guide holder both sides are equipped with the support, power device includes the conveyer belt, conveyer belt and guide holder sliding connection.

Strutting arrangement is main installation basis, carry out power input through power device, it removes to drive the concrete aggregate, distinguish concrete aggregate intensity is automatic through feed divider, prevent that the aggregate that intensity is lower from getting into the concrete mixing stage, carry out real-time supervision to thick and thin aggregate transport capacity through grading device, improve grading homogeneity, through screening on conveyor, improve concrete conveying quality, can directly stir, need not add extra screening plant, improve the device integration degree, be convenient for carry out intelligent control, support the guide holder through the support, carry out concrete aggregate through the conveyer belt and carry, support the conveyer belt through the guide holder, prevent that the concrete aggregate of carrying from overweight causing the conveyer belt compression deformation, improve conveyer belt life.

Furthermore, a guide groove is arranged on the guide seat, the conveying belt is connected with the guide groove in a sliding way, the supporting device also comprises a scraper plate which is arranged at the upper side of the conveying belt, the power device also comprises a power wheel, a driven wheel, a change wheel and an auxiliary roller, a plurality of wheel grooves, power wheels and change wheels are arranged on the guide seat, the auxiliary roller and the driven wheel are sequentially arranged in the wheel groove in a penetrating mode, the power wheel and the driven wheel are located on the lower layer, the variable speed wheel is located on the middle layer, the auxiliary roller is located on the upper layer, the conveying belt is in transmission connection with the power wheel, the variable speed wheel, the auxiliary roller and the driven wheel, the power wheel and the variable speed wheel are provided with built-in motors, the conveying belt comprises a primary belt and a secondary belt, the primary belt and the secondary belt comprise a plurality of chain plates which are in transmission connection, the grading device comprises a material mixing pipe, the power wheel, the driven wheel and the auxiliary roller are arranged on the inner ring of the primary belt, the power wheel and the driven wheel are arranged on the inner ring of the secondary belt, and the variable speed wheel is located on the outer ring of the primary belt.

The guide seat guides the conveying belt in a sliding manner through the guide groove, recycled concrete particles crushed by the crushing mechanism flow onto the conveying belt through the storage bin, concrete aggregates are paved through the scraper blade, the concrete aggregates are prevented from being stacked, automatic intelligent screening is facilitated, screening precision is improved, motors are arranged in the power wheel and the change wheel, the power wheel and the change wheel are driving input wheels, the conveying belt is connected into a circle end to end through reversing of the driven wheels, the main belt is supported in an auxiliary mode through the auxiliary rollers, the change wheel and the power wheel are located at different heights, the power wheel, the driven wheel, the change wheel and the auxiliary rollers are supported in a rotating mode through the wheel groove, the change wheel is arranged in two groups and is respectively transmitted with two sides of the conveying direction of the main belt, the main belt and the secondary belt comprise a plurality of chain plates, the chain plates are connected into a whole, and power input is carried out through the power wheel and the driven wheel on the secondary belt, the power wheel inputs power to the primary belt and the secondary belt at the same time, so that the primary belt and the secondary belt have the same rotating speed, and movement errors are prevented.

Further, the chain plates are provided with a plurality of clamping grooves, the clamping grooves are arc-shaped, one side of each chain plate is provided with a sliding rod, adjacent chain plates are connected through the sliding rods, sliding grooves are formed in the chain plates and are in sliding connection with the sliding grooves, the distributing device further comprises a reversing plate, the reversing plate is in fastening connection with a guide seat, the reversing grooves are formed in the reversing plate and are obliquely arranged, each guide groove comprises a primary guide section, a flat guide section and an oblique guide section, the tail end of the primary guide section is provided with the flat guide section and the oblique guide section, a primary belt is sequentially in sliding connection with the primary guide section and the oblique guide section, a secondary belt is sequentially in sliding connection with the primary guide section and the flat guide section, the oblique guide section gradually rises along the height of the aggregate conveying direction, the oblique guide section is provided with a friction surface, the bottom side of the primary belt is in contact with the friction surface, and the lower end of each reversing groove faces the upper side of the middle section of the secondary belt.

The power wheel is positioned at the initial section of the conveying direction of concrete particles, the crushed concrete in the bin can flow to the primary belt, the power wheel is arranged at the rear part of the power wheel to push the concrete particles to move forwards, the stress of the sliding rod is reduced, the sliding rod is prevented from being broken due to local stress concentration, the service life is prolonged, the sliding rod is subjected to sliding guide through the sliding groove, inertial displacement exists in the sliding groove, the power wheel and the change wheel have a rotation speed difference, the output displacement of the change wheel in unit time is greater than that of the power wheel, after power output is carried out through the power wheel, adjacent chain plates are contacted through wall surfaces to carry out transmission, the power transmission efficiency is improved, the primary guide section is a feeding section, the secondary belt is subjected to auxiliary guide through the flat guide section, the primary belt is subjected to auxiliary guide through the inclined guide section, the inclined guide section is arranged in an inclined manner, and the chain plates on the primary belt are subjected to local speed change through the change, the outer ring of the variable-speed wheel is provided with a plurality of teeth which are in chain transmission with the primary belt to enable the chain plate to move upwards along the inclined guide section, in the process of moving upwards the chain plate, the slide rod is pulled out from the sliding groove at the lower side, the chain plate is limited through the friction surface, the self weights of the chain plate and the concrete at the upper side are balanced to prevent the chain plate from moving downwards, when the slide rod is pulled out from the sliding groove at the lower side, the other tooth is in transmission with the chain plate at the lower side, the time for the two teeth to alternately enter meshing is unit time, in the unit time, the displacement difference output by the variable-speed wheel and the power wheel is the inertial displacement in the sliding groove, the variable-speed wheel drives the chain plate at the lower side to locally increase the speed, the chain plate at the lower side rapidly moves upwards, the slide rod shrinks towards the sliding groove, the concrete particles with large mass have large inertia, the particles with smaller mass are easy to move in an unbalanced state through instantaneous speed increase, roll out from the clamping groove, and the rotating speed of the variable-speed wheel is adjusted, can set up the unbalanced minimum quality of concrete granule state, the draw-in groove arc sets up, improves the granule ride comfort that slides, and the switching-over board leads to unbalanced concrete granule through the switching-over groove, makes the concrete granule direction secondary area that rolls out, carries out automatic screening to thick and thin aggregate, improves intelligent screening performance.

Further, feed divider still includes two sets of pressure sensing subassemblies and shrouding, and pressure sensing subassembly and shrouding are connected, and the conveyer belt back half section is arranged in to the shrouding, shrouding and guide holder fastening connection, the shrouding and the primary belt swing joint of upside, shrouding and the secondary belt swing joint of downside are equipped with a plurality of vary voltage grooves on the shrouding, and vary voltage groove and draw-in groove compound die become to press and become to become the chamber, vary voltage groove one side is equipped with the intake duct, and the intake duct inlet end is equipped with the gas tube, intake duct and gas tube intermittent type intercommunication, the inlet of gas tube and air supply intercommunication.

The thick and thin aggregates after the coarse and thin materials are primarily screened are respectively intelligently identified through the pressure sensing assembly, the aggregates with smaller strength are extracted, the intelligent screening quality is improved, two groups of aggregates are respectively arranged through the sealing plate and the pressure sensing assembly, the sealing plate is fixed through the guide seat, the lower side of the sealing plate is an intelligent screening station, when a primary belt moves to the lower side of the upper sealing plate or a secondary belt moves to the lower side of the lower sealing plate, the lower side of the sealing plate is contacted with the chain plate, a variable pressure groove on the sealing plate and a clamping groove on the chain plate are matched to form a variable pressure cavity, the variable pressure cavity is sealed through a contact wall surface, the power wheel performs step transmission, after the variable pressure cavity is formed, gas input is performed through an inflation pipe, gas guiding is performed through an air inlet channel, the inflation pipe is communicated with a gas source, the gas source can be a high-pressure nitrogen source, high-pressure gas is injected into the variable pressure cavity through the high-pressure nitrogen source, within a rated time, the gas pressure change value in the variable pressure cavity is positively correlated with the air suction volume of concrete particles, the more the concrete particles are sucked, the larger the gas change value is, the more the concrete is sucked, the larger the specific surface area of the concrete particles is, and the lower the strength is, so that the concrete particles with different strengths can be automatically detected.

Further, be equipped with a plurality of detection chambeies on the shrouding, pressure sensing subassembly is arranged in and is detected the intracavity, and pressure sensing subassembly includes magnet core, pressure sensing gasbag, induction coil and driving plate, and pressure sensing gasbag is arranged in and is detected the intracavity, detects chamber and vary voltage groove intercommunication, and the vary voltage groove one side and driving plate fastening connection are kept away from to pressure sensing gasbag, and driving plate keeps away from pressure sensing gasbag one side and magnet core transmission and connects, and induction coil arranges in and detects the chamber end, and magnet core and induction coil central line are coaxial to be arranged.

Install pressure sensing subassembly through detecting the chamber, it arranges to detect the chamber slope, install induction coil, it is spacing to carry out the unilateral through the driving plate to pressure sensing gasbag, pressure sensing gasbag is arranged the driving plate in and is pressed the chamber intercommunication department, carry out the local seal to the driving plate, prevent to fill the gas that presses the chamber and reveal through detecting the chamber, the influence detects the precision, pressure sensing gasbag passes through the driving plate and is connected with the transmission of magnet core, after filling into the level pressure gas to pressing the intracavity through the gas tube, it shifts up to drive the magnet core through pressure sensing gasbag, the concrete granule is breathed in, gas pressure reduces, pressure sensing gasbag moves down, it moves down to drive the magnet core through the driving plate, induction coil cuts the magnetic induction line on the magnet core, induced-current production, the bigger magnetic flux of pressure drop is big, the induced-current that produces is big, carry out automated inspection to concrete granule intensity.

Furthermore, the detection cavity is obliquely arranged, the air inlet channel is vertically arranged, the detection cavity is communicated with the air inlet channel, the material distribution device further comprises a stop plate, the stop plate is arranged at the communication position of the air inlet channel and the detection cavity, the stop plate is in dynamic sealing connection with the detection cavity, the stop plate is in transmission connection with a transmission plate, a transmission inclined plane is arranged at the contact end of the stop plate and the transmission plate, and the detection cavity between the pressure sensing air bag and the stop plate is a sealed air chamber;

at the beginning: the magnetic core is positioned at the lower section of the detection cavity;

when in truncation: the magnetic core is located in the upper section of the detection cavity.

When ventilating, under the pressure differential effect, make high-pressure gas promote pressure sensing gasbag and drive the driving plate and shift up, concrete particle size is not of uniform size, consequently, the inflation volume difference is great, the driving plate shifts up the process and promotes the removal of closing plate, closing plate lateral wall and detection chamber sealing contact, along with pressing the intracavity gas volume increase, pressure risees gradually, the driving plate overcomes self gravity and shifts up, and promote the closing plate and make the local flow area of intake duct reduce, when pressing the intracavity pressure to rise to rated pressure, through the driving plate transmission, make the closing plate with the local complete shutoff of intake duct, thereby carry out the level pressure gas injection according to the concrete particle of different volumes is automatic, improve intensity intellectual detection quality.

Further, feed divider still includes magnetic path and electro-magnet, and the draw-in groove downside is equipped with the charging chute, and charging chute upper end both sides are equipped with the recess, and in two recesses were arranged respectively in to magnetic path and electro-magnet, electro-magnet and induction coil electricity were connected, are equipped with a plurality of material collecting tank on the guide holder, and material collecting tank passes through charging chute and draw-in groove intermittent type intercommunication.

The magnetic block is fixed in the groove on one side of the blanking groove, an electromagnet is arranged in the groove on the other side of the blanking groove, the blanking groove is cut off, the magnet core moves downwards, reverse current is generated on the induction coil, the induction coil is electrically connected with the electromagnet, one side of the electromagnet close to the magnetic block is of a same-name magnetic pole, the electromagnet is repelled with the magnetic block, the electromagnet slides along the groove, when the voltage drop is large, the current amount on the induction coil is increased, the electromagnetic pole repulsion force is increased, the electromagnet is retracted from the blanking groove, the blanking groove is communicated with the clamping groove, concrete particles with small strength enter the collecting groove from the blanking groove, intelligent identification is carried out on the concrete particles with insufficient strength, the magnet core moves upwards, the electromagnet and the magnetic block attract each other, the electromagnet is contacted with the magnetic block, the blanking groove is cut off again, and the on-off sensitivity is improved.

Further, the grading device still includes adjust cylinder, be equipped with the material on the mixing tube and say, the slope of material way is arranged, the material is said and is drawn together with total way, total way import is terminal towards the secondary area, it is terminal towards the main band to import along separate routes, along separate routes and total way intercommunication, be equipped with the proportioning bins on the mixing tube, the proportioning bins respectively with along separate routes and total way intercommunication, adjust cylinder and proportioning bins sliding connection, the adjust cylinder upside is equipped with the support plate, the support plate is arranged in along separate routes, the adjust cylinder downside is equipped with the allotment board, allotment board and proportioning bins sliding connection, the allotment board downside is equipped with pretension spring, pretension spring arranges the proportioning bins bottom in, be equipped with the blowpit on the allotment board.

The intelligently screened coarse and fine aggregates are graded and mixed through the material channel, the branch channels are communicated with the tail end of the upper main belt, the main channel is communicated with the lower secondary belt, the pre-tightening spring on the lower side supports the adjusting plate, the proportioning bin slidably guides the adjusting cylinder, and in an initial state, the overlapping area of the discharge chute and the main road on the allocating plate is adjusted by adjusting the output displacement of the cylinder, thereby the grading proportion of coarse and fine aggregates is adjusted, when the coarse aggregates move down along the branch, the adjusting cylinder moves down through the transmission of the carrier plate, the fine aggregates flow out from the discharge chute, the pre-tightening spring is further compressed, when the discharge amount of the coarse aggregate is reduced, the stress of the carrier plate is reduced, make the allotment board shift up under pretension spring effort, the discharge chute reduces with total way overlapping area, and the instantaneous load of gathering fine materials reduces to the grading of gathering fine and fine materials is adjusted in real time, improves intelligent allotment quality.

As optimization, the intelligent screening and conveying device further comprises a negative pressure pipe, and the negative pressure pipe is intermittently communicated with the pressure-changing groove. The negative pressure pipe is communicated with the variable pressure groove intermittently, so that nitrogen in the variable pressure cavity is pumped out, the nitrogen in the concrete particles is analyzed and seeped out, the nitrogen is recycled, the pressure sensing air bag drives the transmission plate to move downwards under the action of negative pressure, the air pressure of the detection cavity on the upper side of the transmission plate is reduced, the stop plate is retracted under the action of pressure difference, the air inlet channel is conducted again, and the continuous detection performance is improved.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, inertial displacement exists in the sliding groove, the variable-speed wheel drives the chain plate on the lower side to locally increase the speed, the mass of concrete particles is large, and the concrete particles with small mass are easy to unbalance in motion state by instantaneous speed increase and roll out from the clamping groove, so that the rolled concrete particles are guided to the secondary belt, the coarse and fine aggregates are automatically screened, and the intelligent screening performance is improved; injecting high-pressure gas into the pressure variable cavity at constant pressure through a high-pressure nitrogen source, wherein the variation value of the air pressure in the pressure variable cavity is in positive correlation with the air suction quantity of concrete particles within a rated time, the more the air suction quantity of the concrete particles is, the larger the variation value of the air is, the more the air suction quantity of the concrete is, the larger the specific surface area of the concrete particles is, and the lower the strength is, so that the concrete particles with different strengths are automatically detected; when the pressure in the pressure variable cavity rises to the rated pressure, the driving plate drives the stop plate to partially and completely block the air inlet channel, so that constant-pressure air injection is automatically performed according to concrete particles with different volumes, and the intelligent detection quality of strength is improved; when the pressure drop is large, the current magnitude on the induction coil is increased, the electromagnetic pole repulsion force is increased, the electromagnet is retracted from the blanking groove, the blanking groove is communicated with the clamping groove, and concrete particles with small strength enter the material collecting groove from the blanking groove to intelligently identify the concrete particles with insufficient strength; through adjust cylinder output displacement, adjust the overlapping area of blowpit and total way on the allotment board to allotment thickness gradation proportion of gathering materials, when the discharge capacity of coarse aggregate descends, the support plate atress reduces, makes the allotment board shift up under pretension spring effort, and blowpit and total way overlapping area reduce, and the instantaneous discharge capacity of fine aggregate reduces, thereby gathers materials to the thickness and carries out real-time regulation to the gradation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the general structure of the present invention;

FIG. 2 is a schematic of the stepped drive of the present invention;

FIG. 3 is a schematic view of the structure of a material separating device and a grading device of the present invention;

FIG. 4 is an enlarged view of portion A of the view of FIG. 3;

FIG. 5 is an enlarged view of portion C of the view of FIG. 4;

FIG. 6 is a schematic representation of a coarse and fine aggregate grade compound of the present invention;

FIG. 7 is an enlarged view of portion B of the view of FIG. 3;

in the figure: 1-supporting device, 11-bracket, 12-scraper, 13-guide seat, 131-guide groove, 1311-primary guide section, 1312-flat guide section, 1313-inclined guide section, 132-material collecting groove, 2-power device, 21-power wheel, 22-driven wheel, 23-conveying belt, 231-chain plate, 2311-clamping groove, 2312-sliding groove, 2313-blanking groove, 232-sliding rod, 24-speed changing wheel, 25-auxiliary roller, 3-material distributing device, 31-pressure sensing component, 311-magnetic core, 312-pressure sensing air bag, 313-induction coil, 314-driving plate, 32-inflation tube, 33-stopping plate, 35-reversing plate, 351-reversing groove, 36-closing plate, 361-detection cavity, 362-air inlet channel, 363-variable pressure tank, 37-magnetic block, 38-electromagnet, 4-grading device, 41-mixing pipe, 411-material channel, 4111-branch channel, 4112-main channel, 412-batching tank, 42-adjusting plate, 43-adjusting cylinder and 5-negative pressure pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides the technical scheme that:

as shown in fig. 1-7, a recycled concrete production is with granularity intelligence screening conveyor, including strutting arrangement 1, power device 2, feed divider 3 and grading device 4, strutting arrangement 1 and 2 swing joint of power device, power device 2 and feed divider 3 are connected, feed divider 3 and strutting arrangement 1 fastening connection, power device 2 and 4 pipeline intercommunication of grading device, grading device 4 and strutting arrangement 1 fastening connection, strutting arrangement 1 includes guide holder 13, guide holder 13 both sides are equipped with support 11, power device 2 includes conveyer belt 23, conveyer belt 23 and guide holder 13 sliding connection.

Strutting arrangement 1 is main installation basis, carry out power input through power device 2, it removes to drive the concrete aggregate, distinguish concrete aggregate intensity is automatic through feed divider 3, prevent that the aggregate that intensity is lower from getting into the concrete mixing stage, carry out real-time supervision to thick and thin aggregate delivery capacity through grading device 4, improve the grading homogeneity, through screening on conveyor, improve concrete conveying quality, can directly stir, need not add extra screening plant, improve the device integration degree, be convenient for carry out intelligent control, support guide holder 13 through support 11, carry out concrete aggregate through conveyer belt 23 and carry, support conveyer belt 23 through guide holder 13, prevent that the concrete aggregate of carrying from overweight to cause conveyer belt 23 to receive the pressure deformation, improve conveyer belt life.

As shown in fig. 1 to fig. 3, a guide groove 131 is provided on the guide base 13, the conveying belt 23 is slidably connected with the guide groove 131, the supporting device 1 further includes a scraping plate 12, the scraping plate 12 is disposed on the upper side of the conveying belt 23, the power device 2 further includes a power wheel 21, a driven wheel 22, a speed-changing wheel 24 and an auxiliary roller 25, a plurality of wheel grooves are provided on the guide base 13, the power wheel 21, the speed-changing wheel 24, the auxiliary roller 25 and the driven wheel 22 are sequentially inserted into the wheel grooves, the power wheel 21 and the driven wheel 22 are located at the lower layer, the speed-changing wheel 24 is located at the middle layer, the auxiliary roller 25 is located at the upper layer, the conveying belt 23 is in transmission connection with the power wheel 21, the speed-changing wheel 24, the auxiliary roller 25 and the driven wheel 22, the power wheel 21 and the speed-changing wheel 24 are built-in motors, the conveying belt 23 includes a primary belt and a secondary belt, the primary belt and the secondary belt include a plurality of chain plates 231, the plurality of chain plates 231 are in transmission connection, the grading device 4 includes a mixing pipe 41, the power wheel 21, the driven wheel 22 and the auxiliary roller 25 are arranged on the inner ring of the primary belt, the power wheel 21 and the driven wheel 22 are arranged on the inner ring of the secondary belt, and the variable speed wheel 24 is arranged on the outer ring of the primary belt.

The guide seat 13 guides the conveying belt 23 in a sliding manner through the guide groove 131, regenerated concrete particles crushed by the crushing mechanism flow onto the conveying belt 23 through the storage bin, concrete aggregates are paved through the scraping plate 12, the concrete aggregates are prevented from being stacked, automatic intelligent screening is facilitated, screening accuracy is improved, motors are arranged in the power wheel 21 and the change wheel 24, the power wheel 21 and the change wheel 24 are driving input wheels, the conveying belt 23 is connected into a circle end to end through reversing of the driven wheel 22, the main belt is supported in an auxiliary mode through the auxiliary roller 25, the change wheel 24 and the power wheel 21 are located at different heights, the power wheel, the driven wheel 22, the change wheel 24 and the auxiliary roller 25 are supported in a rotating mode through wheel grooves, the change wheel 24 is provided with two groups and respectively driven with belts on two sides of the conveying direction of the main belt, the main belt and the secondary belt comprise a plurality of chain plates 231, and are connected into a whole through the chain plates 231, the power wheel 21 and the driven wheel 22 are used for inputting power to the secondary belt, and the power wheel 21 is used for inputting power to the primary belt and the secondary belt at the same time, so that the primary belt and the secondary belt have the same rotating speed, and the movement error is prevented from being caused.

As shown in fig. 2 to 4, a plurality of slots 2311 are formed in the link plates 231, the slots 2311 are arranged in an arc shape, the slide bars 232 are arranged on one side of the link plates 231, the adjacent link plates 231 are connected through the slide bars 232, the slide grooves 2312 are formed in the link plates 231, the slide bars 232 are slidably connected with the slide grooves 2312, the material distribution device 3 further comprises a reversing plate 35, the reversing plate 35 is fixedly connected with the guide seat 13, the reversing grooves 351 are formed in the reversing plate 35, the reversing grooves 351 are obliquely arranged, the guide grooves 131 comprise primary guide sections 1311, the aggregate conveying belt comprises a flat guide section 1312 and an inclined guide section 1313, the flat guide section 1312 and the inclined guide section 1313 are arranged at the tail end of a primary guide section 1311, a primary belt is sequentially in sliding connection with the primary guide section 1311 and the inclined guide section 1313, a secondary belt is sequentially in sliding connection with the primary guide section 1311 and the flat guide section 1312, the inclined guide section 1313 gradually rises in height along the aggregate conveying direction, a friction surface is arranged on the inclined guide section 1313, the bottom side of the primary belt is in contact with the friction surface, and the low-position end of a reversing groove 351 faces the upper side of the middle section of the secondary belt.

The power wheel 21 is positioned at the initial section of the conveying direction of concrete particles, the crushed concrete in the storage bin can flow to the primary belt, the power wheel 21 is arranged at the rear part of the power wheel 21 to push the concrete particles to move forwards, the stress of the sliding rod 232 is reduced, the pulling-off caused by the local stress concentration of the sliding rod is prevented, the service life is prolonged, the sliding guide is carried out on the sliding rod 232 through the sliding groove 2312, the inertial displacement exists in the sliding groove 2312, the rotation speed difference exists between the power wheel 21 and the change wheel 24, the output displacement of the change wheel 24 in unit time is larger than that of the power wheel 21, after the power output is carried out through the power wheel 21, the adjacent chain plates 231 are contacted through the wall surface to carry out the transmission, the power transmission efficiency is improved, the initial guide section 1311 is a feeding section, the auxiliary guide is carried out on the secondary belt through the horizontal guide section 1312, the auxiliary guide is carried out on the primary belt through the inclined guide section 3, and the inclined guide section 1313 is arranged in an inclined way, the chain plate 231 on the main-stage belt is subjected to local speed change through the speed change wheel 24, a plurality of teeth are arranged on the outer ring of the speed change wheel 24, the chain plate 231 moves upwards along the inclined guide section 1313 by chain transmission with the main-stage belt, the slide rod 232 is drawn out from the slide groove 2312 on the lower side in the process of moving upwards of the chain plate 231, the chain plate 231 is limited by friction, the dead weight of the concrete on the chain plate and the upper side is balanced to prevent the chain plate from moving downwards, when the slide rod 232 is drawn out from the slide groove 2312 on the lower side, the other tooth is driven by the chain plate on the lower side, the time for alternately entering and meshing between the two teeth is unit time, the displacement difference output by the speed change wheel 24 and the power wheel 21 in unit time is the inertial displacement in the slide groove 2312, the speed change wheel 24 drives the chain plate 231 on the lower side to perform local speed increase, the chain plate on the lower side rapidly moves upwards, the slide rod 232 contracts towards the slide groove 2312, and the large-mass concrete particles have large inertia, through instantaneous speeding up, the easy motion state of the less granule of quality is unbalanced, rolls out in the draw-in groove 2311, through adjusting the 24 rotational speeds of change wheel, can set up the unbalanced minimum quality of concrete granule state, draw-in groove 2311 arc sets up, improves the granule ride comfort that slides, and the switching-over board 35 leads to unbalanced concrete granule through switching-over groove 251, makes the concrete granule direction secondary area that rolls out, carries out automatic screening to thick and thin aggregate, improves intelligent screening performance.

As shown in fig. 1, 3 to 5, the material distributing device 3 further includes two sets of pressure sensing assemblies 31 and a sealing plate 36, the pressure sensing assemblies 31 are connected to the sealing plate 36, the sealing plate 36 is disposed at the rear half section of the conveying belt 23, the sealing plate 36 is fastened to the guide seat 13, the sealing plate 36 on the upper side is movably connected to the primary belt, the sealing plate 36 on the lower side is movably connected to the secondary belt, a plurality of pressure varying grooves 363 are disposed on the sealing plate 36, the pressure varying grooves 363 and the clamping grooves 2311 are matched to form a pressure varying cavity, an air inlet channel 362 is disposed on one side of the pressure varying grooves 363, an air inlet end of the air inlet channel 362 is provided with an air charging pipe 32, the air inlet of the air charging pipe 362 is intermittently communicated with the air charging pipe 32, and an inlet of the air charging pipe 32 is communicated with an air source.

The thick and thin aggregates after the rough and thin material primary screening are respectively intelligently identified through the pressure sensing assembly 31, aggregates with smaller strength are extracted, the intelligent screening quality is improved, two groups of sealing plates 36 and the pressure sensing assembly 31 are respectively arranged, the sealing plates are fixed through the guide seats 13, the lower sides of the sealing plates are intelligent screening stations, when a primary belt moves to the lower side of the upper sealing plate 36 or a secondary belt moves to the lower side of the lower sealing plate 36, the lower sides of the sealing plates 36 are contacted with the chain plate 231, the pressure change grooves 363 on the sealing plates and the clamping grooves 2311 on the chain plate 231 are matched to form a pressure change cavity, the pressure change cavity is sealed through a contact wall surface, the power wheel 21 is driven in a stepping mode to form the pressure change cavity, gas input is carried out through the gas charging pipe 32, gas guide is carried out through the gas inlet channel 362, the gas charging pipe 32 is communicated with a gas source, the gas source can be a high-pressure nitrogen source, and high-pressure gas is injected into the pressure change cavity through the high-pressure nitrogen source, within the rated time, the air pressure change value in the pressure variable cavity is in positive correlation with the air suction quantity of the concrete particles, the more the air suction quantity of the concrete particles is, the larger the air change value is, the more the air suction quantity of the concrete is, the larger the specific surface area of the concrete particles is, and the lower the strength is, so that the concrete particles with different strengths are automatically detected.

As shown in fig. 4 to 5, the sealing plate 36 is provided with a plurality of detection cavities 361, the pressure sensing assembly 31 is disposed in the detection cavities 361, the pressure sensing assembly 31 includes a magnetic core 311, a pressure sensing air bag 312, an induction coil 313 and a transmission plate 314, the pressure sensing air bag 312 is disposed in the detection cavities 361, the detection cavities 361 are communicated with the pressure varying groove 363, one side of the pressure sensing air bag 312, which is far away from the pressure varying groove 363, is fixedly connected with the transmission plate 314, one side of the transmission plate 314, which is far away from the pressure sensing air bag 312, is in transmission connection with the magnetic core 311, the induction coil 313 is disposed at the end of the detection cavity 361, and the central lines of the magnetic core 311 and the induction coil 313 are coaxially disposed.

The pressure sensing assembly 31 is mounted through the sensing chamber 361, the sensing chamber 361 is arranged obliquely, the induction coil 313 is installed, the pressure sensing air bag 312 is limited at one side by the transmission plate 314, the pressure sensing air bag 312 is arranged at the communication position of the transmission plate 314 and the pressure variable cavity, the transmission plate 314 is partially sealed to prevent the gas filled in the pressure change chamber from leaking through the detection chamber 361 to affect the detection precision, the pressure sensing air bag 312 is in transmission connection with the magnetic core 311 through the transmission plate 314, after the constant-pressure gas is filled into the pressure variable cavity through the gas-filled tube 32, the magnetic core 311 is driven to move upwards through the pressure-sensing air bag 312, after the concrete particles are sucked, the gas pressure is reduced, the pressure-sensing air bag moves downwards, the driving plate 314 drives the magnetic core 311 to move downwards, the induction coil 313 cuts magnetic induction lines on the magnetic core 311 to generate induction current, the larger the voltage drop is, the larger the magnetic flux is, the larger the generated induction current is, and the strength of concrete particles is automatically detected.

As shown in fig. 4 to 5, the detection chamber 361 is obliquely arranged, the air inlet channel 362 is vertically arranged, the detection chamber 361 is communicated with the air inlet channel 362, the material dividing device 3 further comprises a stopping plate 33, the stopping plate 33 is arranged at the communication position of the air inlet channel 362 and the detection chamber 361, the stopping plate 33 is in dynamic sealing connection with the detection chamber 361, the stopping plate 33 is in driving connection with the driving plate 314, the contact end of the stopping plate 33 and the driving plate 314 is provided with a driving inclined surface, and the detection chamber 361 between the pressure sensing air bag 312 and the stopping plate 33 is a sealed air chamber;

at the beginning: the magnetic core 311 is positioned at the lower section of the detection chamber 361;

when in truncation: the magnetic core 311 is located at an upper section of the detection chamber 361.

During ventilation, under the action of pressure difference, high-pressure gas pushes the pressure sensing air bag 312 to drive the transmission plate 314 to move upwards, the concrete granularity is different, therefore, the air inflation difference is large, the transmission plate 314 moves upwards to push the stop plate 33 to move, the outer side wall of the stop plate 33 is in sealing contact with the detection cavity 361, the gas amount in the pressure variable cavity is increased, the pressure is gradually increased, the transmission plate 314 overcomes the self gravity to move upwards, the stop plate 33 is pushed to reduce the local overflowing area of the air inlet channel 362, when the pressure in the pressure variable cavity is increased to the rated pressure, the transmission plate 314 is used for transmission, the stop plate 33 partially and completely seals the air inlet channel 362, so that the constant-pressure air injection is automatically carried out according to concrete particles with different volumes, and the intelligent detection quality of strength is improved.

As shown in fig. 1 and 4, the material distributing device 3 further includes a magnet 37 and an electromagnet 38, a material receiving groove 2313 is provided at the lower side of the card slot 2311, grooves are provided at both sides of the upper end of the material receiving groove 2313, the magnet 37 and the electromagnet 38 are respectively disposed in the two grooves, the electromagnet 38 is electrically connected to the induction coil 313, a plurality of material collecting grooves 132 are provided on the guide base 13, and the material collecting grooves 132 are intermittently communicated with the card slot 2311 through the material receiving groove 2313.

The magnet block 37 is fixed in the groove at one side of the charging chute 2313, the electromagnet 38 is arranged in the groove at the other side of the charging chute, so that the charging chute 2313 is cut off, and in the process that the magnet core 311 moves downwards, the induction coil 313 generates reverse current, the induction coil is electrically connected with the electromagnet 38, one side of the electromagnet 38 close to the magnetic block 37 is of the same magnetic pole, and the electromagnet is repelled with the magnetic block 37, so that the electromagnet 38 slides along the groove, when the pressure drop is large, the current magnitude on the induction coil is increased, the magnetic pole repulsion force of the electromagnet 38 is increased, so that the electromagnet 38 is retracted from the blanking groove 2313, the blanking groove 2313 is communicated with the clamping groove 2311, concrete particles with small strength enter the collecting groove 132 from the blanking groove 2313, concrete particles with insufficient strength are intelligently identified, in the process that the magnet core 311 moves upwards, the electromagnet 38 and the magnet 37 attract each other in different names, so that the electromagnet 38 and the magnet 37 are in contact, the blanking groove 2313 is cut off again, and the on-off sensitivity is improved.

As shown in fig. 3 and 6-7, the grading device 4 further comprises an adjusting cylinder 43, a mixing pipe 41 is provided with a material passage 411, the material passage 411 is obliquely arranged, the material passage 411 comprises a branch 4111 and a trunk 4112, an inlet of the trunk 4112 faces an end of the secondary belt, an inlet of the branch 4111 faces an end of the primary belt, the branch 4111 is communicated with the trunk 4112, a dispensing groove 412 is provided on the mixing pipe 41, the dispensing groove 412 is respectively communicated with the branch 4111 and the trunk 4112, the adjusting cylinder 43 is slidably connected with the dispensing groove 412, a carrier plate is provided on an upper side of the adjusting cylinder 43, the carrier plate is disposed in the branch 4111, a distributing plate 42 is provided on a lower side of the adjusting cylinder 43, the distributing plate 42 is slidably connected with the dispensing groove 412, a pre-tightening spring is disposed on a lower side of the distributing groove 42, and a discharge groove is provided on the distributing plate 42.

Grading mixing is carried out on the intelligently screened coarse and fine aggregates through a material channel 411, a shunt 4111 is communicated with the tail end of a main belt on the upper side, a main belt 4112 is communicated with a secondary belt on the lower side, a distribution plate 42 is supported through a pre-tightening spring on the lower side, a distribution groove 412 is used for carrying out sliding guide on a regulating cylinder 43, in an initial state, the regulating cylinder 43 outputs displacement to regulate the overlapping area of a discharge groove on the distribution plate 42 and the main belt 4112, so as to regulate the grading proportion of the coarse and fine aggregates, when the coarse aggregates move downwards along the shunt 4111, the regulating cylinder 43 moves downwards through carrier plate transmission, the fine aggregates flow out from a discharge groove, the pre-tightening spring is further compressed, when the coarse aggregate discharge quantity descends, the stress of the carrier plate is reduced, the distribution plate 42 moves upwards under the acting force of the pre-tightening spring, the overlapping area of the discharge groove and the main belt is reduced, the instantaneous fine aggregate discharge quantity is reduced, so as to carry out real-time regulation on the coarse aggregate grading, the intelligent blending quality is improved.

As optimization, the intelligent screening and conveying device further comprises a negative pressure pipe 5, and the negative pressure pipe 5 is intermittently communicated with the pressure-changing groove 363. The negative pressure pipe 5 is intermittently communicated with the variable pressure groove 363, so that nitrogen in the variable pressure cavity is pumped out, the nitrogen in the concrete particles is analyzed and seeped out for recycling, the pressure sensing air bag 312 drives the transmission plate 314 to move downwards under the action of negative pressure, the air pressure of the detection cavity 361 on the upper side of the transmission plate 314 is reduced, the stopping plate 33 is retracted under the action of pressure difference, the air inlet channel 362 is conducted again, and the continuous detection performance is improved.

The working principle of the invention is as follows: inertial displacement exists in the sliding groove 2312, the variable-speed wheel 24 drives the chain plate 231 on the lower side to carry out local speed increasing, the chain plate on the lower side is enabled to move upwards quickly, the sliding rod 232 contracts towards the inside of the sliding groove 2312, the inertia of concrete particles with large mass is large, the movement state of the concrete particles with smaller mass is easy to unbalance through instantaneous speed increasing, the concrete particles roll out from the clamping groove 2311, the rolled concrete particles are guided to a secondary belt, the coarse and fine aggregates are automatically screened, and the intelligent screening performance is improved; injecting high-pressure gas into the pressure variable cavity at constant pressure through a high-pressure nitrogen source, wherein the variation value of the air pressure in the pressure variable cavity is in positive correlation with the air suction quantity of concrete particles within a rated time, the more the air suction quantity of the concrete particles is, the larger the variation value of the air is, the more the air suction quantity of the concrete is, the larger the specific surface area of the concrete particles is, and the lower the strength is, so that the concrete particles with different strengths are automatically detected; the pressure is gradually increased along with the increase of the gas amount in the pressure variable cavity, the transmission plate 314 moves upwards to overcome the self gravity and push the stop plate 33 to reduce the local overflowing area of the air inlet channel 362, and when the pressure in the pressure variable cavity is increased to the rated pressure, the transmission plate 314 transmits the pressure to ensure that the stop plate 33 completely blocks the local part of the air inlet channel 362, so that the constant-pressure gas injection is automatically carried out according to concrete particles with different volumes, and the intelligent detection quality of the strength is improved; when the pressure drop is large, the current magnitude on the induction coil is increased, the magnetic pole repulsion force of the electromagnet 38 is increased, the electromagnet 38 is retracted from the blanking groove 2313, the blanking groove 2313 is communicated with the clamping groove 2311, concrete particles with small strength enter the collecting groove 132 from the blanking groove 2313, and intelligent identification is carried out on the concrete particles with insufficient strength; under the initial condition, through adjusting cylinder 43 output displacement, adjust the overlapping area of the blowpit on the allotment board 42 and total way 4112 to allotment the gradation proportion that the thickness was gathered materials, when the discharge capacity that the coarse aggregate descends, the support plate atress reduces, makes allotment board 42 shift up under pretension spring effort, and blowpit and total way overlapping area reduce, and the instantaneous discharge capacity that the fine aggregate reduces, thereby carries out real-time regulation to the thickness gradation of gathering materials.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a recycled concrete production is with granularity intelligence screening conveyor which characterized in that: granularity intelligence screening conveyor includes strutting arrangement (1), power device (2), feed divider (3) and gradation device (4), strutting arrangement (1) and power device (2) swing joint, power device (2) and feed divider (3) are connected, feed divider (3) and strutting arrangement (1) fastening connection, power device (2) and gradation device (4) pipeline intercommunication, gradation device (4) and strutting arrangement (1) fastening connection, strutting arrangement (1) includes guide holder (13), guide holder (13) both sides are equipped with support (11), power device (2) include conveyer belt (23), conveyer belt (23) and guide holder (13) sliding connection.

2. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 1, wherein: the utility model discloses a take-up device, including guiding seat (13), conveyer belt (23) and guiding groove (131) sliding connection, strutting arrangement (1) still includes scraper blade (12), conveyer belt (23) upside is arranged in scraper blade (12), power device (2) still includes power wheel (21), follows driving wheel (22), change wheel (24) and supplementary gyro wheel (25), be equipped with a plurality of race ways on guiding seat (13), power wheel (21), change wheel (24), supplementary gyro wheel (25) and follow driving wheel (22) wear to establish in proper order in the race way, power wheel (21) and follow driving wheel (22) are located the lower floor, change wheel (24) are located the middle level, supplementary gyro wheel (25) are located the upper strata, conveyer belt (23) is connected with power wheel (21), change wheel (24), supplementary gyro wheel (25) and follow driving wheel (22) transmission, the power wheel (21) and the variable-speed wheel (24) are built-in motors, the conveying belt (23) comprises a primary belt and a secondary belt, the primary belt and the secondary belt comprise a plurality of chain plates (231), the chain plates (231) are in transmission connection, the grading device (4) comprises a mixing pipe (41), the power wheel (21), the driven wheel (22) and the auxiliary roller (25) are arranged on an inner ring of the primary belt, the power wheel (21) and the driven wheel (22) are arranged on an inner ring of the secondary belt, and the variable-speed wheel (24) is arranged on an outer ring of the primary belt.

3. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 2, wherein: the chain plates (231) are provided with a plurality of clamping grooves (2311), the clamping grooves (2311) are arranged in an arc shape, one side of each chain plate (231) is provided with a sliding rod (232), the adjacent chain plates (231) are connected through the sliding rods (232), each chain plate (231) is provided with a sliding groove (2312), the sliding rods (232) are slidably connected with the sliding grooves (2312), the material distribution device (3) further comprises a reversing plate (35), the reversing plate (35) is fixedly connected with a guide seat (13), each reversing plate (35) is provided with a reversing groove (351), the reversing grooves (351) are obliquely arranged, each guide groove (131) comprises a primary guide section (1311), a flat guide section (1312) and an inclined guide section (1313), the tail end of the primary guide section (1311) is provided with a primary guide section (1311) and an inclined guide section (1313), the primary belt is sequentially slidably connected with the primary guide section (1311) and the inclined guide section (1313), and the secondary belt is sequentially slidably connected with the primary guide section (1311) and the flat guide section (1313), the inclined guide section (1313) gradually rises along the height of the aggregate conveying direction, a friction surface is arranged on the inclined guide section (1313), the bottom side of the primary belt is in contact with the friction surface, and the low-level end of the reversing groove (351) faces the upper side of the middle section of the secondary belt.

4. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 3, wherein: feed divider (3) still include two sets of pressure sensing subassembly (31) and shrouding (36), pressure sensing subassembly (31) and shrouding (36) are connected, conveyer belt (23) back half section is arranged in shrouding (36), shrouding (36) and guide holder (13) fastening connection, shrouding (36) and the primary tape swing joint of upside, shrouding (36) and the secondary tape swing joint of downside, be equipped with a plurality of pressure variation grooves (363) on shrouding (36), pressure variation groove (363) and draw-in groove (2311) compound die become to press the variable chamber, pressure variation groove (363) one side is equipped with intake duct (362), intake duct (362) inlet end is equipped with gas tube (32), intake duct (362) and gas tube (32) intermittent type intercommunication, gas tube (32) import and gas source intercommunication.

5. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 4, wherein: be equipped with a plurality of detection chambeies (361) on shrouding (36), pressure sensing subassembly (31) are arranged in detecting chamber (361), and pressure sensing subassembly (31) include magnet core (311), pressure sensing gasbag (312), induction coil (313) and driving plate (314), pressure sensing gasbag (312) are arranged in detecting chamber (361), detect chamber (361) and vary voltage groove (363) intercommunication, pressure sensing gasbag (312) are kept away from vary voltage groove (363) one side and driving plate (314) fastening connection, driving plate (314) are kept away from pressure sensing gasbag (312) one side and are connected with magnet core (311) transmission, induction coil (313) are arranged in and are detected chamber (361) terminal, magnet core (311) and induction coil (313) central line coaxial arrangement.

6. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 5, wherein: the detecting cavity (361) is obliquely arranged, the air inlet channel (362) is vertically arranged, the detecting cavity (361) is communicated with the air inlet channel (362), the material distributing device (3) further comprises a stopping plate (33), the stopping plate (33) is arranged at the communication position of the air inlet channel (362) and the detecting cavity (361), the stopping plate (33) is in dynamic sealing connection with the detecting cavity (361), the stopping plate (33) is in transmission connection with a transmission plate (314), the contact end of the stopping plate (33) and the transmission plate (314) is provided with a transmission inclined plane, and the detecting cavity (361) between the pressure sensing air bag (312) and the stopping plate (33) is a sealed air chamber;

at the beginning: the magnet core (311) is positioned at the lower section of the detection cavity (361);

when in truncation: the magnetic core (311) is positioned on the upper section of the detection cavity (361).

7. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 6, wherein: the material distributing device (3) further comprises a magnetic block (37) and an electromagnet (38), a blanking groove (2313) is formed in the lower side of the clamping groove (2311), grooves are formed in two sides of the upper end of the blanking groove (2313), the magnetic block (37) and the electromagnet (38) are respectively arranged in the two grooves, the electromagnet (38) is electrically connected with the induction coil (313), a plurality of material collecting grooves (132) are formed in the guide seat (13), and the material collecting grooves (132) are intermittently communicated with the clamping groove (2311) through the blanking groove (2313).

8. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 7, characterized in that: grading plant (4) still includes air cylinder (43), be equipped with material way (411) on mixing pipe (41), material way (411) slope is arranged, material way (411) is including dividing way (4111) and way always (4112), way always (4112) import is terminal towards the secondary zone, divide way (4111) import is terminal towards the primary zone, divide way (4111) and way always (4112) intercommunication, be equipped with proportioning tank (412) on mixing pipe (41), proportioning tank (412) communicates with divide way (4111) and way always (4112) respectively, air cylinder (43) and proportioning tank (412) sliding connection, and adjusting cylinder (43) upside is equipped with the carrier plate, the carrier plate is arranged in divide way (4111), and adjusting cylinder (43) downside is equipped with allotment board (42), allotment board (42) and proportioning tank (412) sliding connection, allotment board (42) downside is equipped with pretension spring, the pre-tightening spring is arranged at the bottom end of the batching tank (412), and a discharge chute is arranged on the batching plate (42).

9. The intelligent granularity screening and conveying device for recycled concrete production as claimed in claim 8, wherein: the intelligent screening conveying device further comprises a negative pressure pipe (5), and the negative pressure pipe (5) is intermittently communicated with the pressure-changing groove (363).