CN113522730B

CN113522730B - Recycled aggregate pneumatic controllable multi-stage grading plate and using method thereof

Info

Publication number: CN113522730B
Application number: CN202110600655.2A
Authority: CN
Inventors: 杨俊丽
Original assignee: Shandong Ruiheng Housing Industry Technology Co ltd
Current assignee: Shandong Ruiheng Housing Industry Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-09-06
Anticipated expiration: 2041-05-31
Also published as: CN113522730A

Abstract

The invention discloses a pneumatic controllable multi-stage grading plate for recycled aggregate and a using method thereof, belonging to the field of recycled concrete, the recycled aggregate of concrete is graded and screened by a screening plate with variable screen holes, the required aggregate can be accurately obtained, the pneumatic controllable multi-stage grading plate expands and enlarges by inflating an inflating ring, an external magnetic arc plate is pushed to a variable blanking barrel by utilizing the characteristic that the inner ring of the inflating ring enlarges, the variable blanking barrel is pushed inwards to reduce by the external magnetic arc plate due to mutual repulsion between the variable blanking barrel and the external magnetic arc plate, so that the aperture of the screen holes is reduced, the size of the screen holes is determined by the inflating amount of the inflating ring, the purpose of accurately controlling the size of the screen holes by the inflating amount is realized, so that the required recycled aggregate with different particle sizes can be obtained, the accuracy of aggregate grading is effectively improved, and the device has simple structure and easy operation, convenient material taking and low cost.

Description

Recycled aggregate pneumatic controllable multi-stage grading plate and using method thereof

Technical Field

The invention relates to the field of recycled concrete, in particular to a recycled aggregate pneumatic controllable multi-stage grading plate and a using method thereof.

Background

Concrete is one of the most important civil engineering materials of the present generation. The artificial stone is prepared by a cementing material, granular aggregate (also called aggregate), water, an additive and an admixture which are added if necessary according to a certain proportion, and the artificial stone is formed by uniformly stirring, closely molding, curing and hardening. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. These characteristics make it very widely used, not only in various civil engineering, that is shipbuilding, machinery industry, ocean development, geothermal engineering, etc., but also concrete is an important material.

The regenerated concrete is new concrete prepared by crushing, cleaning and grading waste concrete blocks, mixing the crushed waste concrete blocks with the grading according to a certain proportion, partially or completely replacing natural aggregates (mainly coarse aggregates) such as sand stones and the like, and then adding cement, water and the like. The recycled concrete can be combined into aggregates in the following cases: all aggregates are regenerated aggregates; the coarse aggregate is regenerated aggregate, and the fine aggregate is natural sand; the coarse aggregate is natural gravel or cobble, and the fine aggregate is regenerated aggregate; the reclaimed aggregate replaces part of the coarse aggregate or the fine aggregate.

The coarse aggregate is mainly large-particle aggregate, and needs to be screened and separated into different particle sizes after being crushed and cleaned.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a recycled aggregate pneumatic controllable multi-stage grading plate and a using method thereof, the recycled aggregate of concrete is graded and screened by a screening plate with variable screen holes, the required aggregate can be accurately obtained, the recycled aggregate is expanded and enlarged by inflating an inflating ring, an external magnetic arc plate is pushed to a variable blanking barrel by utilizing the characteristic that the inner ring of the inflating ring is enlarged, the variable blanking barrel is pushed inwards to be reduced by the external magnetic arc plate due to mutual repulsion between the variable blanking barrel and the external magnetic arc plate, so that the aperture of the screen holes is reduced, the size of the screen holes is determined by the inflating amount of the inflating ring, the aim of accurately controlling the size of the screen holes by the inflating amount is fulfilled, the required recycled aggregate with different particle sizes can be obtained, the accuracy of aggregate grading is effectively improved, and the device has simple structure and easy operation, convenient material taking and low cost.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a pneumatic controllable multistage gradation board of recycled aggregate, includes the sieve flitch, the sieve flitch is hollow structure, and set up a plurality of sieve meshes with inside intercommunication on the sieve flitch, every equal fixedly connected with rather than the variable blanking section of matcing in the sieve mesh, variable blanking section includes the linkage segment, the equal fixedly connected with in upper and lower both ends of linkage segment and the port fixed connection's of sieve mesh deformation section, the inner wall of linkage segment is inlayed and is had the built-in magnetism arc board of a plurality of equidistant settings, the inside of sieve flitch is provided with the circle of aerifing of cover in variable blanking section periphery, and passes through the hose intercommunication between two adjacent aerifys the circle, aerify a plurality of external magnetism arc boards that match with built-in magnetism arc board of lateral wall fixedly connected with that the circle is close to variable blanking section, a plurality of elastic connecting rods of fixedly connected with between linkage segment and the external magnetism arc board. The screen plate with changeable screen holes is used for grading and screening concrete recycled aggregates, required aggregates can be accurately obtained, the screen plate inflates the inflation ring to enable the inflation ring to be enlarged, the external magnetic arc plate is pushed to the variable blanking barrel by utilizing the characteristic that the inner ring of the inflation ring is enlarged, the variable blanking barrel and the external magnetic arc plate are mutually exclusive, so that the variable blanking barrel is pushed inwards by the external magnetic arc plate to be reduced, the aperture of the screen holes is reduced, the size of the screen holes is determined by the inflation amount of the inflation ring, the purpose of accurately controlling the size of the screen holes through the inflation amount is realized, the required recycled aggregates with different particle sizes can be obtained, the grading accuracy of the aggregates is effectively improved, the device is simple in structure and easy to operate, and the material taking is convenient and low in cost.

Further, the length of the deformation section is less than the length of the connecting section, and the port of the deformation section is parallel and level with the port of the sieve mesh, and the deformation section has played the effect of being connected with the sieve mesh, in order to prevent the regenerated aggregate card at the entrance of the sieve mesh, therefore the deformation section will be parallel and level with the entrance of the sieve mesh.

Further, the linkage segment all adopts the wear-resisting smooth material of elasticity with the deformation section, be in order to prevent by the aggregate fish tail, the slipperiness is in order to let the aggregate can be smooth to pass through, in order to avoid appearing the condition that blocks, and the elasticity of deformation section is greater than the elasticity of linkage segment, be so in order to let the linkage segment can keep straight as far as possible when the shrink becomes, avoid appearing the condition of card material, also be simultaneously in order to let the deformation section more gentle some when the shrink, in order to avoid the aggregate to be piled up in a large number at the sieve mesh entrance and to lead to the unloading slow.

Furthermore, the magnetism of the built-in magnetic arc plate is the same as that of the external magnetic arc plate, the principle that like magnets repel each other is utilized, the external magnetic arc plate pushes the connecting section inwards to enable the external magnetic arc plate to shrink to be small, the size of the external magnetic arc plate and the size of the connecting section are consistent, the stability of repulsive force is improved, and the built-in magnetic arc plate can be ensured to be subjected to all repulsive force of the external magnetic arc plate.

Further, the inside of aerifing the circle is provided with concentric circles, and a plurality of elasticity restriction poles of fixedly connected with between concentric circles and the inner wall of aerifing the circle, the elasticity restriction pole is in order to let aerify the circle and aerify the even grow of ability when inflation to make every change of aerifing the circle can keep unanimous, and then make the regulation of every sieve mesh all the same, concentric circles adopt no elasticity material.

Furthermore, still fixedly connected with multiunit restriction soft silk between the inner wall of concentric circles and inflatable ring, and two restriction soft silks of every group are located the both sides of elasticity restriction pole respectively, and restriction soft silk plays the expanded effect of restriction to it is big and lead to inflatable ring explosion to avoid the inflation volume.

Furthermore, the length of the limiting soft wire is larger than that of the elastic limiting rod, so that expansion and enlargement of the inflatable ring are not hindered, the limiting soft wire is made of an inelastic material, and when the inflatable ring expands to enable the limiting soft wire to be stretched, the inflatable ring does not continue to expand under the tensile force of the limiting soft wire, so that explosion caused by overlarge inflation amount is prevented.

Furthermore, a plurality of the elastic connecting rods are distributed in an up-and-down mode, the elasticity of the elastic connecting rods is sequentially enhanced from top to bottom, the size of the sieve mesh is actually determined by the inlet of the sieve mesh, and in order to enable the inlet of the sieve mesh to be reduced firstly during adjustment, the elasticity of the elastic connecting rods above the sieve mesh is small, and the rigidity of the elastic connecting rods above the sieve mesh is large.

Furthermore, a plurality of and the gas charging connector that aerifys the circle intercommunication are installed to the lateral wall of sieve flitch, are for conveniently connecting outside aerating device, and sieve flitch adopts the high strength antifriction material, causes wearing and tearing to sieve flitch when preventing to sieve the aggregate.

Further, a use method of the recycled aggregate pneumatic controllable multi-stage classification plate comprises the following steps:

s1, mounting the sieve plate on a left-right reciprocating mechanism, and communicating the air charging interface of the sieve plate with an air charging device;

s2, dumping the recycled aggregate of the cleaned concrete on a sieve plate, firstly starting an inflation device to inflate air into an inflation ring, wherein the size of a sieve hole is determined by the amount of the inflated air, the external magnetic arc plate is close to the connecting section due to the expansion of the inflation ring, the connecting section is contracted to reduce the sieve hole, and then starting a reciprocating mechanism to sieve out the aggregate with small particle size;

and S3, after the first screening is finished, the size of the screen holes is adjusted by air discharge through the air charging interface, so that the required recycled aggregate with different particle sizes is obtained, after all the air in the air charging ring is discharged, the aggregate with medium particle size can be screened, and the aggregate left on the screen plate is the largest aggregate.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme comes to carry out classified screening to concrete regeneration aggregate through the changeable sieve flitch of sieve mesh, can accurately obtain required aggregate, it makes its inflation grow through aerifing in the circle to aerifing, the characteristic that the circle inner circle becomes big is aerifyd the external magnetism arc board and pushes away to variable blanking barrel, because mutual repulsion between variable blanking barrel and the external magnetism arc board, consequently variable blanking barrel is pushed inwards by external magnetism arc board and is dwindled, thereby the aperture that makes the sieve mesh diminishes, the circle of aerifing the size of sieve mesh has been decided to what of volume of aerifing, thereby realized coming the purpose of accurate control sieve mesh size through the volume of aerifing, so that can obtain the required regeneration aggregate of different particle diameters, the hierarchical accuracy of aggregate has effectively been improved, and this device simple structure easily operates, convenient for material collection is with low costs.

(2) The length of deformation section is less than the length of linkage segment, and the port parallel and level of the port of deformation section and sieve mesh, and the deformation section has played the effect of being connected with the sieve mesh, in order to prevent regeneration aggregate card at the entrance of sieve mesh, consequently the deformation section will with the entry parallel and level of sieve mesh.

(3) The linkage segment all adopts the wear-resisting smooth material of elasticity with the deformation segment, be in order to prevent by the aggregate fish tail, the smoothness is in order to let the aggregate pass through smoothly, in order to avoid appearing the condition of blocking, and the elasticity of deformation segment is greater than the elasticity of linkage segment, be so in order to let the linkage segment can keep straight as far as possible when the shrink becomes, avoid appearing the condition of card material, also be in order to let the deformation segment more gentle some when the shrink simultaneously, in order to avoid the aggregate to lead to the unloading to be slow at a large amount of pile-ups of sieve mesh entrance.

(4) The magnetism of the built-in magnetic arc plate is the same as that of the external magnetic arc plate, the principle that like magnets repel each other is utilized, the external magnetic arc plate pushes the connecting section inwards to enable the shrinkage of the connecting section to be small, the size of the external magnetic arc plate and the size of the connecting section are consistent, the stability of repulsive force is improved, and the built-in magnetic arc plate can be guaranteed to be capable of receiving all repulsive force of the external magnetic arc plate.

(5) The inside of inflating the circle is provided with concentric circles, and a plurality of elasticity restriction poles of fixedly connected with between concentric circles and the inner wall of inflating the circle, the elasticity restriction pole be in order to let inflate the circle and aerify the even grow of ability when inflation to make every change of inflating the circle can keep unanimous, and then make the regulation of every sieve mesh all the same, concentric circles adopt no elasticity material.

(6) And a plurality of groups of limiting soft wires are fixedly connected between the concentric rings and the inner wall of the inflatable ring, and two limiting soft wires in each group are respectively positioned at two sides of the elastic limiting rod and play a role in limiting expansion so as to prevent the inflatable ring from exploding due to large inflation quantity.

(7) The length of the soft wire is limited to be larger than that of the elastic limiting rod so as not to hinder the expansion of the inflatable ring from becoming larger, the soft wire is limited to be made of an inelastic material, and when the inflatable ring expands to enable the limiting soft wire to be stretched, the inflatable ring does not expand continuously under the tensile force of the limiting soft wire, so that explosion caused by overlarge inflation amount is prevented.

(8) The elastic connecting rods are distributed in an up-and-down mode, the elasticity of the elastic connecting rods is sequentially enhanced from top to bottom, the size of the sieve mesh is actually determined by the inlet of the sieve mesh, the inlet of the sieve mesh is reduced firstly when the sieve mesh is adjusted, and therefore the elasticity of the elastic connecting rods above the sieve mesh is small and the rigidity of the elastic connecting rods above the sieve mesh is large.

(9) The lateral wall of sieve flitch is installed a plurality ofly and is aerifyd the interface of aerifing of circle intercommunication, is for conveniently connecting outside aerating device, and sieves the flitch and adopt the antifriction material of high strength, causes wearing and tearing to sieve flitch when preventing to sieve the aggregate.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the screen holes of the present invention before being reduced;

FIG. 3 is a schematic view of the present invention after the screen holes are reduced;

FIG. 4 is a schematic cross-sectional view of the variable blanking drum of the present invention;

FIG. 5 is a schematic view of the inflatable ring of the present invention in a pre-inflated state;

FIG. 6 is a schematic view of the inflatable ring of the present invention in an inflated state;

FIG. 7 is a schematic view of the variable blanking barrel of the present invention in a state before reduction;

FIG. 8 is a schematic view of a reduced state of the variable blanking barrel of the present invention;

fig. 9 is a schematic cross-sectional view of the inflatable ring of the present invention.

The reference numbers in the figures illustrate:

the device comprises a sieve plate 1, sieve holes 101, a variable blanking barrel 2, a 201 connecting section, a 202 deformation section, an internal magnetic arc plate 203, an external magnetic arc plate 3, an elastic connecting rod 4, an inflation ring 5, a concentric ring 501, an elastic limiting rod 502 and a soft wire 503.

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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-9, a pneumatic controllable multi-stage grading plate for recycled aggregate comprises a sieve plate 1, referring to fig. 1, the sieve plate 1 is of a hollow structure, the side wall of the sieve plate 1 is provided with a plurality of inflation ports communicated with an inflation ring 5, which is convenient for connecting an external inflation device, the sieve plate 1 is made of high-strength friction-resistant material, so that abrasion to the sieve plate 1 during aggregate sieving is prevented, the sieve plate 1 is provided with a plurality of sieve holes 101 communicated with the inside, and each sieve hole 101 is fixedly connected with a variable blanking barrel 2 matched with the sieve hole 101;

referring to fig. 4-8, the variable charging barrel 2 includes a connection section 201, the upper and lower ends of the connection section 201 are fixedly connected with a deformation section 202 fixedly connected with the port of the sieve pore 101, the length of the deformation section 202 is smaller than the length of the connection section 201, and the port of the deformation section 202 is flush with the port of the sieve pore, the deformation section 202 plays a role of connecting with the sieve pore 101, in order to prevent the regenerated aggregate from being stuck at the inlet of the sieve pore 101, therefore, the deformation section 202 is flush with the inlet of the sieve pore 101, the connection section 201 and the deformation section 202 both adopt elastic wear-resistant smooth materials, in order to prevent the aggregate from being scratched, the smoothness is to allow the aggregate to pass smoothly, so as to avoid the situation of sticking, and the elasticity of the deformation section 202 is greater than that of the connection section 201, so as to keep the connection section 201 as flat as possible when the shrinkage becomes smaller, avoid the situation of sticking, and also to make the deformation section 202 smoother when the shrinkage, so as to avoid aggregate from being piled up in a large number at the entrance of the sieve hole and cause blanking to slow, the inner wall of the connecting section 201 is inlaid with a plurality of built-in magnetic arc plates 203 arranged at equal intervals, the magnetism of the built-in magnetic arc plates 203 is the same as that of the external magnetic arc plates 3, the principle that like magnets repel each other is utilized, the external magnetic arc plates 3 push the connecting section 201 inwards to make the contraction of the connecting section 201 smaller, and the sizes of the two are the same, so as to increase the stability of repulsive force and ensure that the built-in magnetic arc plates 203 can bear all repulsive force of the external magnetic arc plates 3;

referring to fig. 2-3 and fig. 9, the inside of the material sieving plate 1 is provided with an air charging ring 5 sleeved on the periphery of the variable charging barrel 2, the inside of the air charging ring 5 is provided with a concentric ring 501, a plurality of elastic limiting rods 502 are fixedly connected between the concentric ring 501 and the inner wall of the air charging ring 5, the elastic limiting rods 502 are used for enabling the air charging ring 5 to be uniformly enlarged when inflated and expanded, so that the change of each air charging ring 5 can be kept consistent, and further the adjustment of each sieve pore is the same, the concentric ring 501 is made of an inelastic material, a plurality of groups of limiting soft wires 503 are fixedly connected between the concentric ring 501 and the inner wall of the air charging ring 5, and each group of two limiting soft wires 503 are respectively located at two sides of the elastic limiting rods 502, the limiting soft wires 503 play a role in limiting expansion, so as to prevent the air charging amount from causing explosion of the air charging ring 5, and the length of the limiting soft wires 503 is greater than the length of the elastic limiting rods 502, in order not to hinder the inflation of the inflatable ring 5 from becoming larger, and to limit the soft wire 503 to be made of an inelastic material, when the inflatable ring 5 is expanded to ensure that the soft limiting wire 503 is straightened, the inflatable ring 5 is not expanded continuously under the tension of the soft limiting wire 503, thereby preventing explosion caused by overlarge inflation quantity, the adjacent two inflation rings 5 are communicated through a hose, the side wall of the inflation ring 5 close to the variable charging barrel 2 is fixedly connected with a plurality of external magnetic arc plates 3 matched with the internal magnetic arc plates 203, a plurality of elastic connecting rods 4 are fixedly connected between the connecting section 201 and the external magnetic arc plates 3, the plurality of elastic connecting rods 4 are distributed in an up-and-down way, and the elasticity of the elastic connecting rod 4 is enhanced from top to bottom in sequence, the size of the sieve mesh is actually determined by the inlet of the sieve mesh, in order to reduce the size of the openings of the screen holes during adjustment, the elastic connecting rod 4 above is less elastic and more rigid.

The using method of the device comprises the following steps:

s1, firstly, mounting the sieve plate 1 on a mechanism which reciprocates left and right, and then communicating an air charging interface of the sieve plate 1 with an air charging device;

s2, pouring the cleaned recycled concrete aggregate on the sieve plate 1, starting an inflation device to inflate the inflatable ring 5, wherein the size of the sieve hole is determined by the inflation amount, the external magnetic arc plate 3 is close to the connecting section 201 due to the expansion of the inflatable ring 5, the connecting section 201 is contracted to reduce the sieve hole, and then starting a reciprocating mechanism to sieve out the aggregate with small particle size;

s3, after the first screening is finished, the size of the screen holes is adjusted by air discharge through the air charging interface, so that the required recycled aggregate with different particle sizes is obtained, when all the air in the air charging ring 5 is discharged, the aggregate with medium particle size can be screened, and the aggregate left on the screen plate 1 is the largest aggregate.

The working principle of the device is as follows: when aerifing in the circle 5, the characteristic that the 5 inner circles grow of ring is aerifyd to external magnetism arc plate 3 crowds to variable blanking barrel 2 to the utilization, owing to mutual repulsion between built-in magnetism arc plate 203 and the external magnetism arc plate 3, consequently built-in magnetism arc plate 203 is inwards crowded and is reduced by external magnetism arc plate 3, and then make built-in magnetism arc plate 203 drive linkage segment 201 and deformation section 202 all reduce, thereby make the aperture of sieve mesh 101 diminish, aerify the size that how much decided sieve mesh 101 of circle 5 aeration volumes, thereby realized coming the purpose of accurate control sieve mesh size through the aeration volume, so that can obtain the regeneration aggregate of required different particle diameters.

Come to carry out the classified screening to concrete regeneration aggregate through the changeable sieve flitch 1 of sieve mesh, can accurately obtain required aggregate, it makes its inflation grow through aerifing in the circle 5, utilize the characteristic of the 5 inner circles grow of circle of aerifing to push external magnetism arc plate 3 to variable blanking section of thick bamboo 2, because mutual repulsion between variable blanking section of thick bamboo 2 and the external magnetism arc plate 3, consequently variable blanking section of thick bamboo 2 is inwards pushed and is crowded dwindled by external magnetism arc plate 3, thereby make the aperture of sieve mesh diminish, the size of sieve mesh has been decided to what of the circle 5 inflation volumes of aerifing, thereby realized coming the purpose of accurate control sieve mesh size through the inflation volumes, so that can obtain the required regeneration aggregate of different particle diameters, the hierarchical accuracy nature of aggregate has effectively been improved, and this device simple structure easily operates, convenient for material collection is with low costs.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.

Claims

1. The utility model provides a pneumatic controllable multistage hierarchical board of regeneration aggregate, includes sieve flitch (1), sieve flitch (1) is hollow structure, and sieve flitch (1) is last to offer a plurality of sieve meshes (101) with inside intercommunication, its characterized in that: each sieve pore (101) is fixedly connected with a variable blanking barrel (2) matched with the sieve pore, the variable blanking barrel (2) comprises a connecting section (201), the upper end and the lower end of the connecting section (201) are fixedly connected with a deformation section (202) fixedly connected with a port of the sieve pore (101), a plurality of built-in magnetic arc plates (203) which are arranged at equal intervals are embedded in the inner wall of the connecting section (201), an inflation ring (5) sleeved on the periphery of the variable blanking barrel (2) is arranged in the screening plate (1), and two adjacent inflatable rings (5) are communicated through a hose, the side wall of the inflatable ring (5) close to the variable charging barrel (2) is fixedly connected with a plurality of external magnetic arc plates (3) matched with the internal magnetic arc plates (203), a plurality of elastic connecting rods (4) are fixedly connected between the connecting section (201) and the external magnetic arc plate (3).

2. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 1, characterized in that: the length of the deformation section (202) is smaller than that of the connecting section (201), and the end opening of the deformation section (202) is flush with the end opening of the sieve hole (101).

3. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 1, characterized in that: the connecting section (201) and the deformation section (202) are both made of elastic wear-resistant smooth materials, and the elasticity of the deformation section (202) is larger than that of the connecting section (201).

4. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 1, characterized in that: the magnetism of the built-in magnetic arc plate (203) is the same as that of the external magnetic arc plate (3), and the two magnetic arc plates are the same in size.

5. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 1, characterized in that: the inflatable ring is characterized in that a concentric ring (501) is arranged inside the inflatable ring (5), a plurality of elastic limiting rods (502) are fixedly connected between the concentric ring (501) and the inner wall of the inflatable ring (5), and the concentric ring (501) is made of an inelastic material.

6. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 5, characterized in that: a plurality of groups of limiting soft wires (503) are fixedly connected between the concentric circular rings (501) and the inner wall of the inflatable ring (5), and each group of two limiting soft wires (503) are respectively positioned at two sides of the elastic limiting rod (502).

7. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 6, characterized in that: the length of the limiting soft wire (503) is larger than that of the elastic limiting rod (502), and the limiting soft wire (503) is made of an inelastic material.

8. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 1, characterized in that: a plurality of elastic connecting rods (4) are distributed in an up-down mode, and the elasticity of the elastic connecting rods (4) is sequentially enhanced from top to bottom.

9. The recycled aggregate pneumatic controllable multi-stage classification plate according to claim 1, characterized in that: the side wall of the sieve plate (1) is provided with a plurality of inflation connectors communicated with the inflation rings (5), and the sieve plate (1) is made of high-strength friction-resistant materials.

10. The use method of the recycled aggregate pneumatic controllable multi-stage classification plate according to any one of claims 1 to 9, characterized by comprising the following steps: the method comprises the following steps:

s1, firstly, mounting the sieve plate (1) on a mechanism which reciprocates left and right, and then communicating an air charging interface of the sieve plate (1) with an air charging device;

s2, pouring the recycled aggregate of the cleaned concrete on a sieve plate (1), firstly starting an air charging device to charge air into an air charging ring (5), determining the size of a sieve pore (101) by the amount of the charged air, enabling an external magnetic arc plate (3) to approach a connecting section (201) by the expansion of the air charging ring (5), further enabling the connecting section (201) to contract to reduce the size of the sieve pore (101), and then starting a reciprocating mechanism to sieve out the aggregate with small particle size;

s3, after the first screening is finished, the size of the screen holes (101) is adjusted by air discharge through the air charging interface, so that the required recycled aggregate with different particle sizes is obtained, when the air in the air charging ring (5) is completely discharged, the aggregate with medium particle size can be screened, and the aggregate left on the screen plate (1) is the maximum aggregate.