CN111660440A - Concrete recovery plant - Google Patents

Concrete recovery plant Download PDF

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Publication number
CN111660440A
CN111660440A CN202010589396.3A CN202010589396A CN111660440A CN 111660440 A CN111660440 A CN 111660440A CN 202010589396 A CN202010589396 A CN 202010589396A CN 111660440 A CN111660440 A CN 111660440A
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CN
China
Prior art keywords
sand
fine sand
box body
outer shell
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010589396.3A
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Chinese (zh)
Inventor
张修磊
孙明阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Tianjun Heavy Industry Machinery Co ltd
Original Assignee
Qingdao Tianjun Heavy Industry Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Tianjun Heavy Industry Machinery Co ltd filed Critical Qingdao Tianjun Heavy Industry Machinery Co ltd
Priority to CN202010589396.3A priority Critical patent/CN111660440A/en
Publication of CN111660440A publication Critical patent/CN111660440A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00General arrangement or layout of plant
    • B28C9/02General arrangement or layout of plant for producing mixtures of clay or cement with other materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D21/00Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/267Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/0007Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04Supplying or proportioning the ingredients
    • B28C7/0481Plant for proportioning, supplying or batching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04Supplying or proportioning the ingredients
    • B28C7/12Supplying or proportioning liquid ingredients
    • B28C7/126Supply means, e.g. nozzles

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The concrete recycling equipment comprises a sand-stone separating device, wherein the sand-stone separating device comprises a box body, a first sewage bucket is arranged below the box body, and a vibrating screen is arranged inside the box body; the belt conveying device is arranged close to the box body and is positioned in the vibration direction of the vibration of the vibrating screen to and fro; the coarse sand extraction device comprises a first mortar pump and a coarse sand separation device; and the fine sand extraction device comprises a second mortar pump and a fine sand separation device. The concrete recycling equipment can separate stones, coarse sand, fine sand and water in the unused concrete in the mixer truck one by one, and recycle the stones, the coarse sand, the fine sand and the water, so that the utilization efficiency of raw materials is improved.

Description

Concrete recovery plant
Technical Field
The invention belongs to the technical field of recovery devices, and particularly relates to concrete recovery equipment.
Background
The concrete is an artificial stone which is prepared by taking cement as a main cementing material, mixing with water, sand, stones and the like according to a proper proportion, uniformly stirring, compacting, forming, maintaining and hardening. The mixing plant transports the concrete that has stirred to the building site with the trucd mixer, all can persist many in the churn of trucd mixer and do not use up or adhere to the concrete of section of thick bamboo wall, before loading the concrete next time, need with the concrete clean up in the churn. In the prior art, the unused concrete is directly cleaned out of the stirring barrel and cannot be recycled, so that the waste of resources is caused.
Disclosure of Invention
The invention aims to provide concrete recycling equipment, and the concrete recycling equipment solves the problems in the background technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a concrete recycling apparatus comprising:
the sand-stone separating device comprises a box body, the box body is of an upper and lower opening structure, a first sewage bucket is arranged below the box body, a vibrating screen is arranged inside the box body, and the vibrating screen performs reciprocating vibration in the horizontal direction;
the belt conveying device is arranged close to the box body and is positioned in the vibration direction of the vibration of the vibrating screen to and fro;
the coarse sand extraction device comprises a first mortar pump and a coarse sand separation device, one end of the first mortar pump is connected with the first sewage hopper, the other end of the first mortar pump is connected with the coarse sand separation device, the coarse sand separating device is arranged in an upward inclined way from the head part to the tail part and comprises a first outer shell, a cylindrical spiral conveying blade is arranged in the first outer shell, a first motor is arranged at the top end of the first outer shell, the first motor is connected with the cylindrical spiral conveying blade, a coarse sand feeding hole and a coarse sand discharging hole are arranged on the lower surface of the first outer shell, the coarse sand inlet is positioned at the head of the first outer shell, the coarse sand outlet is positioned at the tail of the first outer shell, a fine sand outlet is arranged on the upper surface of the first outer shell, the vertical height of the fine sand outlet is lower than that of the discharge hole, and the fine sand outlet is connected with a second sewage hopper;
fine sand extraction element, fine sand extraction element includes second mortar pump and fine sand separator, second mortar pump one end is connected with second sewage fill, and the other end is connected with the swirler, the swirler is connected with fine sand separator, fine sand separator is by the head to afterbody upwards slope setting, fine sand separator includes the second shell, the inside toper spiral delivery vane that is equipped with of second shell, and the diameter that is located the toper spiral delivery vane of fine sand separator head is greater than the diameter that is located its afterbody, the top of second shell is equipped with the second motor, the second motor is connected with toper spiral delivery vane, be equipped with fine sand feed inlet and fine sand discharge gate on the second shell, fine sand feed inlet is located the head of second shell, the fine sand discharge gate is located the afterbody of second shell, and a sewage interface is also arranged on the second outer shell.
On the basis of the above scheme and as the preferable scheme of the above scheme, the sand-stone separation device further comprises an installation frame, the installation frame is positioned above the box body, and a water adding pipe is fixedly arranged on the installation frame.
On the basis of the above scheme and as a preferable scheme of the above scheme, a concrete discharging platform is arranged in front of the box body, and the concrete discharging platform is obliquely arranged.
On the basis of the scheme and as a preferable scheme of the scheme, material flushing water pipes are arranged above the vibrating screen and on one side, close to the discharging, of the box body.
On the basis of the scheme and as a preferable scheme of the scheme, a water baffle is arranged on the opposite side, close to the discharging, of the box body.
On the basis of the scheme and as a preferable scheme of the scheme, the water baffle is arc-shaped.
On the basis of the above-mentioned scheme and as a preferable scheme of the above-mentioned scheme, the rotation speed of the cylindrical spiral conveying blade is greater than the rotation speed of the conical conveying blade.
On the basis of the scheme and as the preferred scheme of the scheme, the sewage interface is connected with the stirring tank, the stirring tank is connected with the adjusting tank, the adjusting tank is connected with the finished product slurry tank, and stirring devices are arranged in the stirring tank, the adjusting tank and the finished product slurry tank.
On the basis of above-mentioned scheme and as the preferred scheme of above-mentioned scheme, still include that the storehouse is stored to the stone and the storehouse is stored to the grit, the storehouse is stored to the stone and the storehouse is stored to the grit and is set up side by side, the storehouse is stored to the stone is located belt conveyor's afterbody below, the storehouse is stored to the grit is located the below of coarse sand discharge gate and fine sand discharge gate.
The invention has the following beneficial effects: the concrete recovery equipment can separate stones, coarse sand, fine sand and water in the unused concrete in the mixer truck one by one, and recycle the stones, the coarse sand, the fine sand and the water, so that the utilization efficiency of raw materials is improved; the water adding pipe can clean the stirring tank, so that the residual concrete in the stirring tank is cleaned more cleanly; the concrete unloading platform is obliquely arranged, so that the mixer truck can be prevented from touching the box body, and the box body is protected from being damaged; the water baffle can prevent water from splashing to the ground; the separated sewage is directly connected with a stirring tank and directly utilized in the production of new concrete; the stone storage bin and the sand storage bin separate the separated stones from coarse sand and fine sand, and the stones cannot be mixed together.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
Figure 2 is a front view of the sand separation device.
Fig. 3 is a schematic structural diagram of the coarse sand extraction device.
Fig. 4 is a schematic structural view of another view of the grit extractor.
Fig. 5 is a schematic structural view of the fine sand extraction device.
Fig. 6 is a schematic structural view of another view of the fine sand extraction device.
The reference numbers are as follows:
1. a sand and stone separation device; 11. a box body; 12. a first sewage bucket; 13. vibrating screen; 14. a water baffle; 15. a material flushing water pipe; 16. a mounting frame; 17. a water feeding pipe; 18. a concrete discharge table;
2. a belt conveyor;
3. a coarse sand extraction device; 31. a first outer case; 32. a cylindrical helical conveying blade; 33. a first motor; 34. a coarse sand feed port; 35. a coarse sand discharge port; 36. a fine sand outlet; 37. a first rotating shaft;
4. a fine sand extraction device; 41. a second outer housing; 42. a conical helical conveying blade; 43. a second motor; 44. a fine sand feed port; 45. a fine sand discharge port; 46. a sewage interface; 47. a second rotating shaft; 48. a swirler;
5. a stirring tank; 6. a conditioning tank; 7. a finished product slurry tank; 8. a stone storage bin; 9. a sand storage bin.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity 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.
As shown in fig. 1 to 6, a concrete reclamation apparatus includes:
the sand-stone separating device 1 comprises a box body 11, the box body 11 is of an upper and lower opening structure, a first sewage bucket 12 is arranged below the box body 11, a vibrating screen 13 is arranged inside the box body 11, and the vibrating screen 13 performs reciprocating vibration in the horizontal direction;
the belt conveying device 2 is arranged close to the box body 11 and is positioned in the vibration direction of the back-and-forth vibration of the vibrating screen 13;
the coarse sand extraction device 3 comprises a first mortar pump and a coarse sand separation device, one end of the first mortar pump is connected with the first sewage hopper 12, the other end of the first mortar pump is connected with the coarse sand separation device, the coarse sand separation device is arranged by inclining the head part to the tail part upwards, the coarse sand separation device comprises a first outer shell 31, a cylindrical spiral conveying blade 32 is arranged in the first outer shell 31, a first motor 33 is arranged at the top end of the first outer shell 31, the first motor 33 is connected with the cylindrical spiral conveying blade 32, a coarse sand feed inlet 34 and a coarse sand discharge outlet 35 are arranged on the lower surface of the first outer shell 31, the coarse sand feed inlet is positioned at the head part of the first outer shell 31, the coarse sand discharge outlet is positioned at the tail part of the first outer shell 31, a fine sand outlet 36 is arranged on the upper surface of the first outer shell 31, and the vertical height of the fine sand outlet 36 is lower than that of the discharge outlet, the fine sand outlet 36 is connected with a second sewage bucket 38;
fine sand extraction element 4, fine sand extraction element 4 includes second mortar pump and fine sand separator, second mortar pump one end is connected with second sewage fill 38, and the other end is connected with swirler 48, swirler 48 is connected with fine sand separator, fine sand separator is by the head to the afterbody setting of upwards inclining, fine sand separator includes second shell 41, second shell 41 is inside to be equipped with toper spiral delivery vane 42, and the diameter that is located the toper spiral delivery vane 42 of fine sand separator head is greater than the diameter that is located its afterbody, the top of second shell 41 is equipped with second motor 43, second motor 43 is connected with toper spiral delivery vane 42, be equipped with fine sand feed inlet 44 and fine sand discharge gate 45 on second shell 41, fine sand feed inlet 44 is located the head of second shell 41, the fine sand discharge port 45 is located at the tail of the second outer shell 41, and a sewage port 46 is further arranged on the second outer shell 41.
Sand and stone separator 1 still includes mounting bracket 16, mounting bracket 16 is located 11 tops of box, the fixed filler pipe 17 that is equipped with on the mounting bracket 16, the filler pipe can wash the agitator tank, makes the remaining concrete clearance in the agitator tank cleaner.
A concrete discharging platform 18 is arranged in front of the box body 11, and the concrete discharging platform 18 is arranged obliquely, so that the mixer truck can be prevented from touching the box body, and the box body is protected from being damaged.
And a material flushing water pipe 15 is arranged above the vibrating screen 13 and on one side of the box body 11 close to the discharging, and sand stuck on stones can be quickly flushed by the material flushing water pipe, so that sand and stone separation is facilitated.
The opposite side of unloading on box 11 is equipped with breakwater 14, breakwater 14 is the arc, and the breakwater can prevent that grit and stone from dropping on the ground when the trucd mixer pours into surplus concrete, and can prevent that the water of wash pipe from spilling out the box.
The rotating speed of the cylindrical spiral conveying blade is 8 to 12 revolutions per minute, under the rotating speed, coarse sand is not easy to fall off from the cylindrical spiral conveying blade, but fine sand and water can fall off from the cylindrical spiral conveying blade under the action of centrifugal force and gravity; the rotating speed of the conical spiral conveying blade is 4 to 6 revolutions per minute, fine sand is not easy to fall off from the conical spiral conveying blade at the rotating speed, but water can fall off from the conical spiral conveying blade.
A first rotating shaft 37 is arranged inside the first outer shell 31, the cylindrical spiral conveying blade 32 is fixedly arranged on the first rotating shaft 37, the first rotating shaft 37 is connected with a first motor 33, and the first motor drives the cylindrical spiral conveying blade to rotate through the first rotating shaft; second casing 41 is inside to be equipped with second pivot 47, toper spiral delivery vane 42 is fixed to be established on second pivot 47, second pivot 47 is connected with second motor 43, and the second motor drives toper spiral delivery vane through the second pivot and rotates.
The sewage interface 46 is connected with the stirring tank 5, the stirring tank 5 is connected with the adjusting tank 6, the adjusting tank 6 is connected with the finished product slurry tank 7, stirring devices are arranged in the stirring tank 5, the adjusting tank 6 and the finished product slurry tank 7, the separated sewage is directly connected with the stirring tank, and the separated sewage is directly utilized in the production of new concrete.
Still store storehouse 8 and sand including the stone and store storehouse 9, the stone is stored storehouse 8 and is stored storehouse 9 with the grit and set up side by side, the tail below that storehouse 8 is located belt conveyors 2 is stored to the stone, the below that storehouse 9 is located coarse sand discharge gate 35 and fine sand discharge gate 45 is stored to the grit, and the stone is stored storehouse and sand and is stored the storehouse and make the stone and coarse sand, the fine sand separation of isolating, can not be in the same place.
When the concrete mixer truck is used, the truck is firstly driven into the concrete unloading platform, then the rest concrete is unloaded into the box body, at the moment, the vibrating screen vibrates back and forth, sand and water flow into the first sewage hopper, stones cannot fall off from the vibrating screen and fall onto the belt conveying device, and the belt conveying device conveys the separated stones to the stone storage bin; the sand and water falling into the first sewage bucket enter the coarse sand extraction device under the action of the first mortar pump, the coarse sand is conveyed into the sand storage bin through the cylindrical spiral conveying blade, and the fine sand and the water fall from the cylindrical spiral conveying blade and enter the second sewage bucket due to light weight; the second mortar pump pumps the fine sand and water from the second sewage bucket into the cyclone, the cyclone is utilized to enable the fine sand to enter the fine sand extraction device, the fine sand is conveyed into the sand storage bin through the conical spiral conveying blade, and finally the remaining sewage flows into the stirring tank from the sewage interface for reuse. The concrete recycling equipment can separate stones, coarse sand, fine sand and water in the unused concrete in the mixer truck one by one, and recycle the stones, the coarse sand, the fine sand and the water, so that the utilization efficiency of raw materials is improved.
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 (9)

1. A concrete recycling apparatus, comprising:
the sand-stone separating device (1), the sand-stone separating device (1) comprises a box body (11), the box body (11) is of an upper and lower opening structure, a first sewage bucket (12) is arranged below the box body (11), a vibrating screen (13) is arranged inside the box body (11), and the vibrating screen (13) performs reciprocating vibration in the horizontal direction;
the belt conveying device (2) is arranged close to the box body (11) and is positioned in the vibration direction of the vibration of the vibrating screen (13) back and forth;
the coarse sand extraction device (3) comprises a first mortar pump and a coarse sand separation device, one end of the first mortar pump is connected with a first sewage hopper (12), the other end of the first mortar pump is connected with the coarse sand separation device, the coarse sand separation device is arranged by inclining the head part to the tail part upwards, the coarse sand separation device comprises a first outer shell (31), a cylindrical spiral conveying blade (32) is arranged in the first outer shell (31), a first motor (33) is arranged at the top end of the first outer shell (31), the first motor (33) is connected with the cylindrical spiral conveying blade (32), a coarse sand feeding hole (34) and a coarse sand discharging hole (35) are formed in the lower surface of the first outer shell (31), the coarse sand feeding hole is formed in the head part of the first outer shell (31), and the coarse sand discharging hole is formed in the tail part of the first outer shell (31), a fine sand outlet (36) is formed in the upper surface of the first outer shell (31), the vertical height of the fine sand outlet (36) is lower than that of the discharge hole, and the fine sand outlet (36) is connected with a second sewage bucket (38);
fine sand extraction element (4), fine sand extraction element (4) includes second mortar pump and fine sand separator, second mortar pump one end is connected with second sewage fill (38), and the other end is connected with swirler (48), swirler (48) are connected with fine sand separator, fine sand separator is by the head to the ascending setting of afterbody, fine sand separator includes second shell (41), second shell (41) inside is equipped with toper spiral delivery vane (42), and the diameter that is located toper spiral delivery vane (42) of fine sand separator head is greater than the diameter that is located its afterbody, the top of second shell (41) is equipped with second motor (43), second motor (43) are connected with toper spiral delivery vane (42), be equipped with fine sand feed inlet (44) and fine sand discharge gate (45) on second shell (41), the fine sand feeding hole (44) is located at the head of the second outer shell (41), the fine sand discharging hole (45) is located at the tail of the second outer shell (41), and a sewage interface (46) is further arranged on the second outer shell (41).
2. The concrete recycling apparatus according to claim 1, wherein: the sand-stone separating device (1) further comprises a mounting rack (16), the mounting rack (16) is located above the box body (11), and a water adding pipe (17) is fixedly arranged on the mounting rack (16).
3. The concrete recycling apparatus according to claim 1, wherein: a concrete discharging platform (18) is arranged in front of the box body (11), and the concrete discharging platform (18) is obliquely arranged.
4. The concrete recycling apparatus according to claim 1, wherein: and a material flushing water pipe (15) is arranged above the vibrating screen (13) and on one side of the box body (11) close to the discharging.
5. The concrete recycling apparatus according to claim 4, wherein: and a water baffle (14) is arranged on the opposite side of the box body (11) close to the discharging.
6. The concrete recycling apparatus according to claim 5, wherein: the water baffle (14) is arc-shaped.
7. The concrete recycling apparatus according to claim 1, wherein: the rotational speed of the cylindrical helical conveying blade (32) is greater than the rotational speed of the conical conveying blade.
8. The concrete recycling apparatus according to claim 1, wherein: the sewage connector (46) is connected with the stirring tank (5), the stirring tank (5) is connected with the adjusting tank (6), the adjusting tank (6) is connected with the finished product slurry tank (7), and stirring devices are arranged in the stirring tank (5), the adjusting tank (6) and the finished product slurry tank (7).
9. The concrete recycling apparatus according to claim 1, wherein: still store storehouse (8) and sand including the stone and store storehouse (9), storehouse (8) are stored with the grit to the stone and storehouse (9) are set up side by side, the tail portion below that storehouse (8) are located belt conveyors (2) is stored to the stone, the below that storehouse (9) are located coarse sand discharge gate (35) and fine sand discharge gate (45) is stored to the grit.
CN202010589396.3A 2020-06-24 2020-06-24 Concrete recovery plant Pending CN111660440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010589396.3A CN111660440A (en) 2020-06-24 2020-06-24 Concrete recovery plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010589396.3A CN111660440A (en) 2020-06-24 2020-06-24 Concrete recovery plant

Publications (1)

Publication Number Publication Date
CN111660440A true CN111660440A (en) 2020-09-15

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ID=72389859

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010589396.3A Pending CN111660440A (en) 2020-06-24 2020-06-24 Concrete recovery plant

Country Status (1)

Country Link
CN (1) CN111660440A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2757722C1 (en) * 2021-05-17 2021-10-21 Артем Сергеевич Коган System for separating components of residual concrete mixture
CN113843261A (en) * 2021-09-30 2021-12-28 湖南抱洋环境科技有限公司 Concrete sand stone piece-rate system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2757722C1 (en) * 2021-05-17 2021-10-21 Артем Сергеевич Коган System for separating components of residual concrete mixture
WO2022245256A1 (en) * 2021-05-17 2022-11-24 Артем Сергеевич КОГАН Residual concrete mix component separation system
CN113843261A (en) * 2021-09-30 2021-12-28 湖南抱洋环境科技有限公司 Concrete sand stone piece-rate system

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Application publication date: 20200915