CN113318843A

CN113318843A - Crushing device for recycling waste concrete

Info

Publication number: CN113318843A
Application number: CN202110647815.9A
Authority: CN
Inventors: 韩保勤; 宫长兴; 张明伟; 冯琦; 乔丽霞; 李彪; 刘城; 赵欣莉
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-08-31

Abstract

The invention provides a waste concrete recycling crushing device which comprises a rack, and a feeding device, a primary crushing device, a sorting device, a secondary crushing device and a sand making device which are sequentially arranged on the rack, wherein the feeding device is arranged on the rack; the feeding device comprises a feeding hopper arranged on the frame and a vibrating feeder arranged on the lower side of the feeding hopper; the preliminary crushing device is a jaw crusher, and a feed inlet of the jaw crusher is communicated with a discharge outlet of the vibrating feeder; the sorting device is a rotary vibration sieve, and a feed inlet of the rotary vibration sieve is communicated with a discharge outlet of the jaw crusher; a first conveying belt is arranged between a feeding hole of the secondary crushing device and a second discharging hole of the rotary vibrating screen; the invention has the characteristics of improving the particle shape of the recycled aggregate, reducing impurities in the recycled aggregate, facilitating transportation and production and stably improving the quality of the recycled concrete in the production on the collecting site.

Description

Crushing device for recycling waste concrete

Technical Field

The invention relates to engineering machinery, in particular to a waste concrete recycling and crushing device.

Background

Along with the development of the urbanization process of China, the discharge amount of construction waste is increased year by year, and the proportion of renewable components is also continuously improved. However, most of the construction waste is not treated at all and is transported to the suburbs or the periphery of cities for simple landfill or open-air stockpiling, which not only wastes land and resources, but also pollutes the environment; on the other hand, with the increasing population, the demand of sandstone aggregate for the construction industry is increasing. For a long time, as the sandstone aggregate is wide in source, easy to obtain and low in price, the sandstone aggregate is regarded as an inexhaustible raw material and is randomly mined, so that the resource is exhausted, the mountain landslide and the river bed are rerouted, and the natural environment is seriously damaged. The production and utilization of the construction waste recycled aggregate have important significance for saving resources, protecting the environment and realizing the sustainable development of the construction industry. The aggregate prepared by the waste concrete is called recycled concrete aggregate (recycled aggregate for short), the recycled aggregate prepared by simple crushing and screening processes has more edges and corners, rough surface and hardened cement mortar in the components, and in addition, a large amount of microcracks are generated in the concrete block due to damage accumulation in the crushing process, so that the recycled aggregate has high porosity, high water absorption, small stacking density, high porosity and high crushing index. The recycled concrete prepared by the recycled aggregate has large water content, low strength after hardening, low elastic modulus, and lower durability such as impermeability, frost resistance, carbonization resistance, shrinkage, creep and chloride ion permeability resistance than common concrete. Because the quality difference of the waste concrete is large, the performance difference of the recycled aggregate prepared by a simple process is also large, and the popularization and the application of the recycled aggregate are not convenient. In order to improve the performance of recycled concrete, the low-quality recycled aggregate obtained by simple crushing needs to be further subjected to strengthening treatment, namely, the performance of the aggregate is improved by improving the particle shape of the aggregate and removing hardened cement stones attached to the surface of the recycled aggregate: the performance of the reinforced recycled aggregate is obviously improved, and the performance difference of the recycled aggregate prepared from waste concrete with different strength grades is smaller, so that the quality control of the recycled aggregate is facilitated, and the popularization and the application of the recycled concrete are facilitated.

And the broken device that utilizes of abandonment concrete among the prior art requires very high to the place, need beat the ground in advance, and assemble each part in proper order to the position of selecting in advance, and the place of the production of abandonment concrete differs, the abandonment concrete is not of uniform size, directly pile up the transportation, it is mixed and disorderly, occupation space is big, the transportation expense of production is high, need design one kind for this reason and be convenient for according to the construction site removal collection, and carry out the primary processing to abandonment concrete, make it be convenient for transport, and stable, promote the device of recycled concrete quality.

Disclosure of Invention

The invention aims to solve the technical problem of providing a waste concrete recycling crushing device which is produced on a collecting site, improves the particle shape of recycled aggregate, reduces impurities in the recycled aggregate, is convenient for transportation and production and can stably improve the quality of the recycled concrete.

In order to solve the technical problems, the invention adopts the technical scheme that:

adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

a waste concrete recycling crushing device comprises a rack, and a feeding device, a primary crushing device, a sorting device, a secondary crushing device and a sand making device which are sequentially arranged on the rack;

the feeding device comprises a feeding hopper arranged on the frame and a vibrating feeder arranged on the lower side of the feeding hopper;

the preliminary crushing device is a jaw crusher, and a feed inlet of the jaw crusher is communicated with a discharge outlet of the vibrating feeder;

the sorting device is a rotary vibration sieve, and a feed inlet of the rotary vibration sieve is communicated with a discharge outlet of the jaw crusher;

the secondary crushing device is an impact crusher, and a first conveying belt is arranged between a feeding hole of the impact crusher and a second discharging hole of the rotary vibrating screen;

the sand making device is a sand making machine, and a second conveying belt is arranged between a feeding hole of the sand making machine and a discharging hole of the impact crusher.

Further, set up screen cloth, lower screen cloth and be located the sieve of screen cloth lower floor down in the sieve of shaking soon, set up the first discharge gate that corresponds the setting with last screen cloth on the wall of the vibrating screen cylinder, set up the second discharge gate that corresponds the setting with lower screen cloth on the wall of the vibrating screen cylinder, set up the third discharge gate that corresponds the setting with the sieve on the wall of the vibrating screen cylinder, first discharge gate downside sets up first material collection device, third discharge gate downside sets up second material collection device.

Furthermore, an air separation device is arranged on one side of the first conveying belt, a third material collecting device is arranged on the other side of the first conveying belt, and the air separation device and the third material collecting device are respectively positioned on the opposite sides of the first conveying belt.

Further, system sand machine's feed inlet top sets up the magnetic separation device, the magnetic separation device includes a magnetic separation section of thick bamboo, set up more than one magnet on the outer wall of a magnetic separation section of thick bamboo and place the shell, set up more than one through-hole on the wall body of a magnetic separation section of thick bamboo, the through-hole is placed the shell position with the magnet and is corresponded.

Further, a distributing device is arranged below a feed inlet of the sand making machine and comprises an upper distributing plate arranged along the wall of the sand making machine cylinder and a lower distributing plate arranged below the upper distributing plate, and the inner parts of the upper distributing plate and the lower distributing plate are hollow inverted circular truncated cones.

Furthermore, the side edges of the longitudinal sections of the upper distributing plate and the lower distributing plate are arc-shaped.

Further, wheels are arranged on the lower side of the rack.

Furthermore, traction hooks are respectively arranged on the front side and the rear side of the rack.

The waste concrete recycling crushing device can crush, clean, finely crush and sand-making processing on the waste concrete in the collection site, avoids the problems that the waste concrete needs to be transported to a factory for processing and transportation, the occupied space is large, the transportation cost is high, and the like, and can be directly used in the next process by processing the waste concrete in the site.

The rotary vibration sieve adopts a three-layer structure, the upper sieve mesh is mainly used for removing impurities with long lengths such as reinforcing steel bars, the lower sieve mesh is mainly used for screening waste concrete fragments with moderate particle sizes, the sieve plate is mainly used for sorting and collecting impurities such as hardened cement mortar and silt in the waste concrete, the fragments and the impurities in the fragments generated by the waste concrete passing through the jaw crusher are sorted by the rotary vibration sieve, so that the impurities with long lengths and hard impurities such as the reinforcing steel bars in the waste concrete can be reduced, the damage to equipment in the next working procedure is avoided, the impurities such as the hardened cement mortar and the silt in the waste concrete are removed by sorting, the impurity content in the waste concrete can be reduced, the quality of the recycled concrete is stably improved, and the stability of the quality of the recycled products is improved; the invention adopts the middle layer screen mesh for screening the fragments with proper size, thereby being convenient for improving the uniformity of the granularity of the recycled aggregate product formed by subsequent processing and crushing.

According to the invention, the winnowing device and the third material collecting device are correspondingly arranged on the two sides of the first conveying belt, so that light impurities such as paper scraps, plastics and the like doped in the waste concrete are cleaned and collected through the winnowing device, and the influence on the quality of a final product caused by entering equipment of a next process is avoided.

According to the invention, the magnetic separation device is arranged above the feed inlet of the sand making machine, the residual iron-containing impurities in the fragments conveyed in the previous process are separated, the permanent magnet can be placed in the magnet placing shell, the iron-containing impurities in the materials passing through the magnetic separation cylinder are adsorbed, the iron-containing impurities enter the permanent magnet in the magnet placing shell through the through holes, and the impurity residues in the recycled aggregate are reduced through magnetic separation, so that the quality of the recycled aggregate is stabilized.

The invention sets a distributing device on a sand making machine, the distributing device is a distributing plate which is obliquely arranged in an upper layer and a lower layer, the longitudinal section of the working surface of the distributing plate is arc-shaped, fragments falling from a feed inlet fall onto the upper distributing plate firstly, then rebound to fall onto the opposite side of the falling point of the upper distributing plate, rebound again, due to the decline of the elastic potential energy, the fragments fall onto the lower distributing plate, then rebound to fall onto the opposite side of the falling point of the lower distributing plate, then rebound, fall into a working cavity of the sand making machine, the particle size of the fragments falling into the distributing device is more uniform by adopting the sorting of a rotary vibrating screen and the fine crushing of a counterattack type crusher, the particle size of the aggregates prepared by the sand making machine is uniform after the distribution of the distributing device, the particle shape of the regenerated aggregates is improved, and the performance of the aggregates is improved: the performance of the reinforced recycled aggregate is obviously improved, and the performance difference of the recycled aggregate prepared from waste concrete with different strength grades is smaller, so that the quality control of the recycled aggregate is facilitated, and the popularization and the application of the recycled concrete are facilitated.

Drawings

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

FIG. 2 is a schematic view of the upper screen structure of the present invention;

FIG. 3 is a schematic top view of the magnetic separation apparatus of the present invention;

FIG. 4 is a schematic cross-sectional view of a magnetic separation apparatus according to the present invention;

the device comprises a frame, a feeding hopper, a vibrating feeder, a jaw crusher, a rotary vibrating screen 51, an upper screen, a lower screen, a vibrating screen 53, a screen plate 511, a first discharge port 512, a first material collecting device 521, a second discharge port 531, a third discharge port 532, a second material collecting device 6, a counterattack type crusher 7, a first conveying belt 71, a winnowing device 711 and a third material collecting device 8, a sand making machine 81, an upper distributing plate 82, a lower distributing plate 9, a second conveying belt 10, a magnetic separation cylinder 11, a magnet placing shell 12, a through hole 13, a wheel 14 and a traction hook.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-4, the present embodiment provides a waste concrete recycling crushing device, which includes a frame 1, a feeding device, a primary crushing device, a sorting device, a secondary crushing device, and a sand making device, which are sequentially disposed on the frame 1; the feeding device comprises a feeding hopper 2 arranged on the frame 1 and a vibrating feeder 3 arranged on the lower side of the feeding hopper 2; the preliminary crushing device is a jaw crusher 4, and a feed inlet of the jaw crusher 4 is communicated with a discharge outlet of the vibrating feeder 3; the sorting device is a rotary vibration sieve 5, and a feed inlet of the rotary vibration sieve 5 is communicated with a discharge outlet of the jaw crusher 4; the secondary crushing device is an impact crusher 6, a first conveying belt 7 is arranged between a feeding hole of the impact crusher 6 and a second discharging hole 521 of the rotary vibrating screen 5, and crushed stones with proper sizes separated from the rotary vibrating screen 5 are conveyed into the impact crusher 6 from the second discharging hole 521 by the first conveying belt 7; the sand making device is a sand making machine 8, a second conveying belt 9 is arranged between a feeding hole of the sand making machine 8 and a discharging hole of the impact crusher 6, and the second conveying belt 9 conveys materials crushed in the impact crusher 6 to the feeding hole of the sand making machine 8 after crushing, the invention can crush, clean, finely crush and sand making processing waste concrete on an acquisition site, avoids the problems of large occupied space, high transportation cost and the like of the waste concrete which needs to be transported to a manufacturer for processing and transportation, and can directly supply the produced recycled aggregate for the next procedure by processing the waste concrete on the site, stably improves the quality of products prepared from the waste concrete, effectively improves the performances of durability and the like of the products, effectively reduces the cost, saves natural aggregate resources and relieves the contradiction supply and demand of the aggregate, the waste concrete can be fully utilized, the environmental pressure caused by waste concrete treatment is reduced, and the economic benefit and the social benefit are good.

An upper screen mesh 51, a lower screen mesh 52 and a screen plate 53 positioned at the lower layer of the lower screen mesh 52 are arranged in the rotary vibration screen 5, the mesh number of the upper screen mesh 51 is smaller than that of the lower screen mesh 52, a first discharge hole 511 arranged corresponding to the upper screen mesh 51 is arranged on the wall of the vibration screen 5, a second discharge hole 521 arranged corresponding to the lower screen mesh 52 is arranged on the wall of the vibration screen 5, a third discharge hole 531 arranged corresponding to the screen plate 53 is arranged on the wall of the vibration screen 5, a first material collecting device 512 is arranged at the lower side of the first discharge hole 511, the first material collecting device 512 is used for collecting impurities with equal length and longer length such as reinforcing steel bars, a second material collecting device 532 is arranged at the lower side of the third discharge hole 531, the second material collecting device 532 is mainly used for collecting impurities such as hardened cement mortar and silt in waste concrete, the rotary vibration screen 5 adopts a three-layer structure, the upper screen mesh 51 is mainly used for removing the impurities with equal length and longer length such as reinforcing steel bars, the lower screen 52 is mainly used for screening waste concrete fragments with moderate particle size, the screen plate 53 is mainly used for sorting impurities such as hardened cement mortar and silt in the waste concrete, the fragments generated by the waste concrete passing through the jaw crusher 4 and the impurities in the fragments are sorted by the rotary vibration screen 5, so that the steel bars in the waste concrete are equal in length and hard impurities can be reduced, the damage to equipment in the subsequent process is avoided, the impurities such as the hardened cement mortar and the silt in the waste concrete are removed by sorting, the impurity content in the waste concrete can be reduced, the quality of recycled concrete is stably improved, and the stability of the quality of a recycled product is improved; the invention adopts the lower screen mesh 52 for screening the fragments with moderate size, which is convenient for improving the uniformity of the granularity of the recycled aggregate product formed by subsequent processing and crushing.

The air separation device 71 and the third material collection device 711 are correspondingly arranged on the two sides of the first conveying belt, and the air separation device 71 and the third material collection device 711 are used for cleaning and collecting light impurities such as paper scraps, plastics and the like doped in waste concrete through the air separation device 71, so that the influence on the quality of a final product caused by entering equipment in a next process is avoided.

The feed inlet top of system sand machine 8 sets up the magnetic separation device, the magnetic separation device includes magnetic separation section of thick bamboo 10, set up more than one magnet on the outer wall of magnetic separation section of thick bamboo 10 and place shell 11, set up more than one through-hole 12 on the wall body of magnetic separation section of thick bamboo 10, through-hole 12 places shell 11 position with the magnet and corresponds, sets up the magnetic separation device in the top of system sand machine feed inlet, carries remaining iron content impurity in the fragment of coming to the previous process and selects separately, can place the permanent magnet in the magnet placement shell, adsorbs the iron content impurity in the material through the magnetic separation section of thick bamboo, and iron content impurity enters into the permanent magnet in the magnet placement shell through the through-hole on, through the magnetic separation, reduces the impurity in the regeneration aggregate and remains, stabilizes the quality of regeneration aggregate.

The distributing device is arranged below a feed inlet of the sand making machine 8 and comprises an upper distributing plate 81 and a lower distributing plate 82, the upper distributing plate 81 is obliquely arranged along the cylinder wall of the sand making machine 8, the lower distributing plate 82 is arranged below the upper distributing plate 81, the contact surfaces of the inner parts of the upper distributing plate 81 and the lower distributing plate 82 and fragments are in a hollow inverted circular truncated cone shape, the side edges of the longitudinal sections of the upper distributing plate 81 and the lower distributing plate 82 are in an arc shape, the upper distributing plate 81 and the lower distributing plate 82 are made of elastic materials such as rubber and the like and are used for changing the falling trajectory of the fragments and redistributing the falling of the fragments, the distributing device is arranged on the sand making machine 8 and is a distributing plate which is arranged in an upper layer and a lower layer, the longitudinal section of the working surface of the distributing plate is in an arc shape, the fragments falling from the feed inlet fall onto the upper distributing plate 81 firstly and then rebound to the other opposite edge of the falling point of the upper distributing plate 81, rebound once more, because of the decline of its elastic potential energy, it falls down on lower cloth plate 82, fall down on the other side that the cloth plate 82 drop point is relative through the rebound again, rebound back again, fall into the work intracavity of system sand machine 8, because the fragment that falls into the work intracavity of system sand machine 8 has been selected separately through adopting rotary vibrating screen 5, the fine crushing of reaction crusher 6, the fragment granularity size that falls into the distributing device is comparatively even, after distributing the cloth through the distributing device, the aggregate granularity that makes through system sand machine 8 is even, the recycled aggregate particle shape has been improved, improve the performance of aggregate: the performance of the reinforced recycled aggregate is obviously improved, and the performance difference of the recycled aggregate prepared from waste concrete with different strength grades is smaller, so that the quality control of the recycled aggregate is facilitated, and the popularization and the application of the recycled concrete are facilitated.

Wheels 13 are arranged on the lower side of the rack 1, and traction hooks 14 are arranged on the front side and the rear side of the rack 1 respectively, so that the device can move according to construction requirements.

The principle of the construction working process is as follows:

firstly, after moving the crushing device to a specified construction site, fixing the crushing device, then loading waste concrete to be crushed into a feeding hopper 2 of a feeding device by using a forklift, uniformly feeding materials into a jaw crusher 4 by using a vibrating feeder 3, primarily crushing the waste concrete to be crushed by using the jaw crusher 4 as a primary crushing device, feeding fragments and impurities formed after crushing into a rotary vibrating screen 5, wherein the rotary screen 5 is of a three-layer structure, an upper screen 51 is used for sorting large and long non-breakable impurities such as reinforcing steel bars, a screen plate 53 is used for sorting impurities such as silt and hardened cement mortar, a lower screen 52 is used for screening the fragments with proper size, and the fragments enter a subsequent impact crusher 6 through a first conveyer belt 7 to perform a fine crushing operation procedure, and a winnowing device on one side of the first conveyer belt 7 is used for winnowing paper scraps on the first conveyer belt 7, Impurity such as light plastics, cystosepiment are clear away, and fragment after the crushing of impact crusher 6 enters into the feed inlet of system sand machine 8 along with second conveyer belt 9 in, before the working chamber that gets into system sand machine 8, clears away the iron-containing impurity that thoughtlessly has in the fragment by the magnetic separation device, carries out the equipartition to the fragment by the distributing device, through even cloth to make the aggregate granularity that improves the preparation even, improved regeneration aggregate particle shape, improve the performance of aggregate: the performance of the reinforced recycled aggregate is obviously improved, and the performance difference of the recycled aggregate prepared from waste concrete with different strength grades is smaller, so that the quality control of the recycled aggregate is facilitated, and the popularization and the application of the recycled concrete are facilitated.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The waste concrete recycling crushing device is characterized by comprising a rack (1), and a feeding device, a primary crushing device, a sorting device, a secondary crushing device and a sand making device which are sequentially arranged on the rack (1);

the feeding device comprises a feeding hopper (2) arranged on the frame (1) and a vibrating feeder (3) arranged on the lower side of the feeding hopper (2);

the primary crushing device is a jaw crusher (4), and a feed inlet of the jaw crusher (4) is communicated with a discharge outlet of the vibrating feeder (3);

the sorting device is a rotary vibration sieve (5), and a feed inlet of the rotary vibration sieve (5) is communicated with a discharge outlet of the jaw crusher (4);

the secondary crushing device is an impact crusher (6), and a first conveying belt (7) is arranged between a feeding hole of the impact crusher (6) and a second discharging hole (521) of the rotary vibrating screen (5);

the system sand device is system sand machine (8), set up second conveyer belt (9) between the discharge gate of the feed inlet of system sand machine (8) and impact crusher (6).

2. The waste concrete recycling crushing device of claim 1, wherein an upper screen (51), a lower screen (52) and a screen plate (53) positioned at the lower layer of the lower screen (52) are arranged in the rotary vibrating screen (5), a first discharge port (511) corresponding to the upper screen (51) is arranged on the wall of the vibrating screen (5), a second discharge port (521) corresponding to the lower screen (52) is arranged on the wall of the vibrating screen (5), a third discharge port (531) corresponding to the screen plate (53) is arranged on the wall of the vibrating screen (5), a first material collecting device (512) is arranged at the lower side of the first discharge port (511), and a second material collecting device (532) is arranged at the lower side of the third discharge port (531).

3. The recycling and crushing device for waste concrete according to claim 1, wherein an air separation device (71) is arranged on one side of the first conveyor belt (7), a third material collection device (711) is arranged on the other side of the first conveyor belt (7), and the air separation device (71) and the third material collection device (711) are respectively positioned on the opposite sides of the first conveyor belt (7).

4. The waste concrete recycling crushing device according to claim 1, wherein a magnetic separation device is arranged above the feeding hole of the sand making machine (8), the magnetic separation device comprises a magnetic separation barrel (10), more than one magnet placing shell (11) is arranged on the outer wall of the magnetic separation barrel (10), more than one through hole (12) is arranged on the wall body of the magnetic separation barrel (10), and the through hole (12) corresponds to the magnet placing shell (11).

5. The waste concrete recycling crushing device according to claim 1, wherein a distributing device is arranged below a feed inlet of the sand making machine (8), the distributing device comprises an upper distributing plate (81) arranged along the wall of the sand making machine (8) and a lower distributing plate (82) arranged below the upper distributing plate (81), and the inner parts of the upper distributing plate (81) and the lower distributing plate (82) are hollow inverted truncated cone-shaped.

6. The waste concrete recycling crushing device as claimed in claim 5, wherein the side edges of the longitudinal section of the upper distributing plate (81) and the lower distributing plate (82) are arc-shaped.

7. The waste concrete recycling crushing device as claimed in claim 1, wherein wheels (13) are arranged at the lower side of the frame (1).

8. The waste concrete recycling crushing device as claimed in claim 1, wherein the front and rear sides of the frame (1) are respectively provided with a traction hook (14).