CN110550898B - Pretreatment method for raw materials for preparing recycled concrete - Google Patents
Pretreatment method for raw materials for preparing recycled concrete Download PDFInfo
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- CN110550898B CN110550898B CN201910968747.9A CN201910968747A CN110550898B CN 110550898 B CN110550898 B CN 110550898B CN 201910968747 A CN201910968747 A CN 201910968747A CN 110550898 B CN110550898 B CN 110550898B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/04—Jaw crushers or pulverisers with single-acting jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/10—Shape or construction of jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a pretreatment method of raw materials for preparing recycled concrete, which relates to the technical field of concrete production and processing and comprises the following steps: s1, crushing, namely putting the waste concrete blocks into a crusher to be crushed to obtain granular concrete; s2, grinding, namely putting the granular concrete obtained after the crushing by the crusher in the step S1 into a grinder for grinding and grinding to obtain finely-crushed concrete; and S3, screening, namely screening the concrete crushed and ground in the step S2 to sort coarse sand and fine sand contained in the concrete. According to the invention, the inner walls of the static jaw plate and the movable jaw plate are provided with a plurality of carving lugs which are distributed at equal intervals, the squeezing force generated by the carving lugs on the surface of the concrete is used for carving the surface of the waste concrete, and the cracks on the surface of the concrete are carved by the carving lugs, so that the crushing efficiency of the waste concrete is improved.
Description
Technical Field
The invention relates to the technical field of concrete production and processing, in particular to a pretreatment method of raw materials for preparing recycled concrete.
Background
With the vigorous development of commercial concrete in China, the concrete industry has become the pillar industry in the field of building materials. However, concrete is the largest man-made engineering material, and once a building or a structure is disassembled, it is also correspondingly used as the "prime force" of construction waste. At present, the discharge amount of concrete wastes in China is over one hundred million tons every year, the waste concrete cannot be recycled well in the past, a large amount of fields are needed for treating the construction wastes (stacking or landfill), and meanwhile, the cement industry is a countless 'big household' in the aspects of resources and energy consumption as the supporting industry of the building material industry, which is contrary to the current situations of resource shortage and energy shortage in the 21 st century.
According to statistics, the total amount of waste concrete (the sum of the waste concrete in the concrete production process, the building construction process and the building demolition process) of the construction waste generated in China every year can reach over 12000 ten thousand tons. With the further acceleration of the economic construction pace of China, the total amount of construction waste is increased. The crushed construction waste is used as the regenerated aggregate, so that the problem of shortage of natural aggregate resources can be solved, the environmental protection of aggregate production places is facilitated, the stacking and occupation of urban waste concrete and the environmental pollution problem caused by the urban waste concrete can be reduced, the regeneration and recycling of concrete production are realized, and the sustainable development of the construction industry is ensured.
Currently, patent No. CN201811229674.3 discloses a method for recycling waste concrete, which comprises the following steps: (1) removing the steel bars in the waste concrete, crushing the waste concrete by using a crusher, and sieving to remove fine sand and small particles; (2) continuously crushing the waste concrete containing the stones to the size capable of being used as the stones for adding the concrete; (3) washing the waste concrete treated in the step (2) by using water to remove soil and other small particles on the surface; (4) treating small waste concrete blocks; (5) mixing with natural stone blocks; the economic value of the waste concrete is improved, the waste concrete is used for processing the concrete after being processed, and the cost during concrete production is reduced.
The regeneration method of the waste concrete disclosed in the patent still has some defects in practical use, and the specific defects are as follows:
in the actual crushing process of the waste concrete, the waste concrete is long in solidification time and high in surface hardness, small particles are mixed in the concrete, and in the crushing process, the waste concrete surface protects the small particles mixed in the concrete, so that the small particles in the concrete are difficult to crush, and the regeneration preparation treatment of the waste concrete is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a pretreatment method of raw materials for preparing recycled concrete, which solves the technical problem that in the process of crushing waste concrete, the surface of the concrete protects small particles mixed in the concrete, and the small particles in the concrete are difficult to crush.
The technical problem to be solved by the invention is realized by adopting the following technical scheme: a pretreatment method for raw materials for preparing recycled concrete comprises the following steps:
s1, crushing, namely putting the waste concrete blocks into a crusher to be crushed to obtain granular concrete;
s2, grinding, namely putting the granular concrete obtained after crushing by the crusher in the step S1 into a grinder for grinding and grinding to obtain powdery concrete;
s3, screening, namely screening the concrete crushed and ground in the step S2 to sort coarse sand and fine sand contained in the concrete;
s4, preparing new concrete, stirring and mixing the coarse sand and the fine sand selected in the step S3, and adding cement, water, natural sand, natural macadam and pebbles to prepare the new concrete;
the crusher in the step S1 includes a main support plate, the main support plate is vertically fixed on the ground, a second side support plate perpendicular to the main support plate is fixed on the left side of the main support plate, and a first side support plate perpendicular to the main support plate is fixed on the right side of the main support plate;
the top end of the front wall of the main supporting plate is fixedly provided with a crank, the top end of the rear wall of the main supporting plate is provided with a flywheel, the flywheel and the crank are arranged at two ends of the same shaft rod, and the shaft rod is fixedly arranged at the top end of the main supporting plate;
the top end of the crank is provided with a deflector rod, the inner side wall of the second side supporting plate is fixedly provided with a static jaw plate, the static jaw plate is erected on the ground, the top end of the static jaw plate and the bottom end of the static jaw plate are both provided with oblique angles, the right side of the static jaw plate is provided with a movable jaw plate which is obliquely arranged, the top end of the movable jaw plate is provided with a sleeve, the sleeve is hinged to the deflector rod in a sliding fit mode, the right side of the movable jaw plate is provided with a movable jaw supporting frame, the right side of the bottom of the movable jaw supporting frame is close to the bottom end and provided with a pull rod base, and a thrust rod base is arranged above the pull rod base and positioned;
the pull rod base is hinged with a movable jaw pull rod, the top end of the movable jaw pull rod penetrates through the first side supporting plate and extends outwards, a check block is mounted at the top end of the first side supporting plate, a spring is arranged between the bottom of the check block and the right side wall of the first side supporting plate, and the spring is mounted on the outer wall of the movable jaw pull rod;
the top end of the thrust rod is hinged to the left side wall of the first side supporting plate;
the bottom of the right side wall of the first side supporting plate is provided with a base, the top end of the base is fixedly provided with a motor, an output shaft of the motor is provided with a V belt wheel, and V belt transmission is arranged between the V belt wheel and the flywheel.
As a preferred technical solution of the present invention, the grinder in step S2 includes a grinding cylinder, the grinding cylinder is vertically fixed on the ground, a slot is disposed at the bottom of the grinding cylinder, a storage cavity is disposed inside the grinding cylinder, and a fan-shaped opening communicated with the storage cavity is disposed at the top end of the grinding cylinder; the bottom end of the storage cavity is provided with a discharging cavity, the top of the discharging cavity is provided with a grinding wall with a conical structure, the bottom of the discharging cavity is fixedly provided with a guide seat, the guide seat is of a disc-shaped structure with the middle protruding upwards, the corners of the guide seat with the disc-shaped structure are provided with flower pieces, the flower pieces penetrate through the slotted holes and extend outwards, the middle position of the top of the guide seat is provided with an asynchronous motor, and an output shaft of the asynchronous motor is fixedly provided with a rocker;
the grinding cylinder is characterized in that a supporting shaft is fixed to the top end circle center of the grinding cylinder, the supporting shaft penetrates through the material storage cavity downwards and extends into the top end of the material discharge cavity, a clamping table of a circular ring structure is arranged at the bottom end of the supporting shaft, the clamping table is fixedly embedded into a clamping groove in a sliding fit mode, the clamping groove is formed in the top of the clamping seat, the clamping seat is of a cylindrical structure, a hinged support is arranged at the bottom end of the clamping seat, the hinged support is hinged to a hinged seat, the hinged seat is arranged on the top end of the grinding ball, a rotatable shaft rod is arranged at the bottom of the grinding ball, and the bottom end of the shaft rod is fixed.
As a preferred technical scheme of the invention, the grinding ball comprises a grinding ball shell, the grinding ball shell is a cone with a hollow cavity inside, the inner wall of the grinding ball shell is provided with a plurality of circular holes distributed at equal intervals, the bottom of each circular hole is provided with a hollow groove, and the bottom of each hollow groove is provided with a telescopic membrane;
a mandril is embedded in the hole of the round hole in a sliding fit mode, a spherical impact hammer is arranged at one end of the mandril and extends into the hollow groove, a limiting block is arranged on the outer wall of the impact hammer, a disc-shaped mandril base is arranged at the other end of the mandril, a spring is arranged between the mandril base and the inner wall of the grinding ball shell, and the spring is fixedly arranged on the outer circular surface of the mandril;
the shaft lever passes the grinding ball shell from the bottom of grinding ball shell and stretches into in the hollow cavity, the top of shaft lever is fixed on the top of grinding ball shell, the outer wall of shaft lever sets up the ejector pad of half cone structure, the ejector pad promotes the percussion hammer axial and stretches out and draws back.
As a preferred technical scheme of the present invention, the inner wall of the stationary jaw plate is provided with a plurality of chopping lugs which are equidistantly distributed, the chopping lugs are arranged in a strip shape, the surface of each chopping lug is provided with a plurality of chopping knives which are equidistantly distributed, the chopping knives are arranged in a triangular prism structure, and chopping knife edges are arranged on two sides of a chopping knife point of the triangular prism structure.
As a preferred technical scheme of the present invention, the inner wall of the movable jaw plate is provided with a plurality of chopping blocks which are equidistantly distributed, the chopping blocks are arranged in a strip shape, the surface of each chopping block is provided with a plurality of chopping knives which are equidistantly distributed, the chopping knives are arranged in a triangular prism structure, and chopping knife edges are arranged on two sides of a chopping knife point of the triangular prism structure.
Compared with the prior art, the invention at least comprises the following beneficial effects:
firstly, crushing large waste concrete with high surface hardness into small granular concrete by a crusher, wherein crushed sand is easily formed on the surface of the crushed granular concrete, and the surface hardness of the small granular concrete is low;
the crushing machine is arranged to crush the surface of the waste concrete, the waste concrete stored between the movable jaw plate and the static jaw plate is repeatedly extruded through the repeated swinging of the movable jaw plate, the concrete bears extrusion force between the movable jaw plate and the static jaw plate, the waste concrete is broken through the extrusion force, a plurality of small particles are mixed on the broken concrete surface, and the small particles are exposed on the concrete surface, so that the small particles mixed in the waste concrete can be crushed and screened conveniently.
And through the mutual movement between the movable jaw plate and the static jaw plate, the extrusion force of the chiseling lugs on the surface of the concrete is used for chiseling the surface of the waste concrete, and the chiseling lugs are used for chiseling cracks on the surface of the concrete, so that the crushing efficiency of the waste concrete is improved.
And fourthly, arranging a plurality of chisel cutters which are distributed at equal intervals on the surface of each chisel lug, wherein each chisel cutter is of a triangular prism structure, and chisel cutting blades are arranged on two sides of a chisel cutter point of each triangular prism structure, and the chisel cutters scrape the surface of the waste concrete by utilizing the mutual motion between the movable jaw plate and the static jaw plate and scrape and extrude the waste concrete with high surface strength through the chisel cutters.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the attachment of the crusher to the grinder of the present invention;
FIG. 2 is a schematic view of the overall structure of the crusher of the present invention;
FIG. 3 is an enlarged view of the sleeve of the present invention sleeved on the shift lever;
FIG. 4 is a schematic view of a portion of FIG. 2 in the direction C;
FIG. 5 is a schematic sectional view of the grinder of the present invention;
FIG. 6 is a schematic view of a portion of FIG. 1 in the direction B;
FIG. 7 is a schematic view of a portion of FIG. 1 in the direction A;
FIG. 8 is a top view of the guide base of the present invention mounted to the bottom of a grinding cylinder;
FIG. 9 is a process flow diagram of a method for pre-treating recycled concrete preparation raw materials in accordance with the present invention;
in the figure: 1. crusher, 101, main support plate, 102, first side support plate, 103, second side support plate, 104, static jaw plate, 105, support frame, 106, dynamic jaw plate, 107, flywheel, 108, crank, 109, motor, 110, V-belt, 111, base, 112, stopper, 113, compression spring, 114, dynamic jaw pull rod, 115, dynamic jaw support frame, 116, pull rod base, 117, chiseling lug, 1171, chiseling knife, 118, rolling bearing, 119, deflector rod, 120, sleeve, 121, thrust rod base, 122, thrust rod, 2, grinder, 201, grinding cylinder, 202, stock storage chamber, 203, support shaft, 204, chuck table, 205, hinged support, 206, hinged support, 207, grinding ball, 2071, hollow chamber, 2072, impact hammer, 2073, stopper, 2074, spring, 2075, ram, 2076, 2077, ram base, 2078, telescopic membrane, 2079, grinding ball housing, 208, shaft rod, 209. rocker 210, guide holder 211, slotted hole 212, clamping groove 213, clamping holder 214, grinding wall 215, discharge chamber 216, asynchronous machine 217 and push block.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
It will be understood that when an element is referred to as being "secured to" another element, it can be on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.
Example 1
Referring to fig. 1-4 and fig. 9, a method for pretreating recycled concrete raw materials includes the following steps:
s1, crushing, namely putting the waste concrete blocks into a crusher to be crushed to obtain granular concrete;
s2, grinding, namely putting the granular concrete obtained after crushing by the crusher in the step S1 into a grinder for grinding and grinding to obtain powdery concrete;
s3, screening, namely screening the concrete crushed and ground in the step S2 to sort coarse sand and fine sand contained in the concrete;
s4, preparing new concrete, stirring and mixing the coarse sand and the fine sand selected in the step S3, and adding cement, water, natural sand, natural macadam and pebbles to prepare the new concrete;
the crusher 1 described in the above step S1 includes a main support plate 101, the main support plate 101 is vertically fixed on the ground, a second side support plate 103 perpendicular to the main support plate 101 is fixed on the left side of the main support plate 101, and a first side support plate 102 perpendicular to the main support plate 101 is fixed on the right side of the main support plate 101;
the top end of the front wall of the main supporting plate 101 is fixedly provided with a crank 108, the top end of the rear wall of the main supporting plate 101 is provided with a flywheel 107, the flywheel 107 and the crank 108 are arranged at two ends of the same shaft rod, and the shaft rod is fixedly arranged at the top end of the main supporting plate 101;
the top end of the crank 108 is provided with a deflector rod 119, the inner side wall of the second side support plate 103 is fixedly provided with a static jaw plate 104, the static jaw plate 104 is erected on the ground, the top end of the static jaw plate 104 and the bottom end of the static jaw plate 104 are both provided with oblique angles, a plurality of support frames 105 are fixed between the static jaw plate 104 and the inner side wall of the second side support plate 103, the support frames 105 are distributed at equal intervals between the second side support plate 103 and the static jaw plate 104, the support frames 105 are arranged in a T-shaped structure, and the large end of the support frame 105 in the T-shaped structure is fixed on the inner wall of the; a movable jaw plate 106 which is obliquely arranged is arranged in front of the static jaw plate 104, a sleeve 120 is arranged at the top end of the movable jaw plate 106, the sleeve 120 is hinged to a shifting rod 119 in a sliding fit mode, a rolling bearing 118 is arranged at the hinged position of the sleeve 120 and the shifting rod 119, a movable jaw support frame 115 is arranged on the right side of the movable jaw plate 106, a plurality of support frames 105 which are distributed at equal intervals are arranged inside the movable jaw support frame 115, and the top end of each support frame 105 is fixed on the right side wall of the movable jaw plate 106; a pull rod base 116 is arranged on the right side of the bottom of the movable jaw support frame 115 close to the bottom end, and a thrust rod base 121 is arranged above the pull rod base 116 and on the right side of the movable jaw support frame 115;
the pull rod base 116 is hinged with a movable jaw pull rod 114, the top end of the movable jaw pull rod 114 extends out through the first side support plate 102, the top end of the first support plate 102 is provided with a stop block 112, the top of the stop block 112 is provided with a screw cap, the outer circular surface of the movable jaw pull rod 114 is provided with a thread matched with the screw cap, and the screw cap and the movable jaw pull rod 114 are locked through the thread; a spring 113 is arranged between the bottom of the stop block 112 and the right side wall of the first side support plate 102, and the spring 113 is arranged on the outer wall of the movable jaw pull rod 114; the thrust rod base 121 is hinged with a thrust rod 122, and the top end of the thrust rod 122 is hinged with the left side wall of the first side support plate 102; the bottom of the right side wall of the first side supporting plate 102 is provided with a base 111, the base 111 is of a square structure, the top end of the base 111 is fixedly provided with a motor 109, an output shaft of the motor 109 is provided with a V belt wheel, and a V belt 110 is arranged between the V belt wheel and the flywheel 107 for transmission.
The inner wall of the static jaw plate 104 is provided with a plurality of chopping blocks 117 which are distributed at equal intervals, the chopping blocks 117 are arranged in a strip shape, the surface of each chopping block 117 is provided with a plurality of chopping knives 1171 which are distributed at equal intervals, each chopping knife 1171 is arranged in a triangular prism structure, and chopping knife edges are arranged on two sides of the chopping knife 1171 in the triangular prism structure.
The inner wall of the movable jaw plate 106 is provided with a plurality of chopping blocks 117 which are distributed at equal intervals, the chopping blocks 117 are arranged in a strip shape, the surface of each chopping block 117 is provided with a plurality of chopping knives 1171 which are distributed at equal intervals, each chopping knife 1171 is arranged in a triangular prism structure, and chopping knife edges are arranged on two sides of the chopping knife 1171 in the triangular prism structure.
The surface of each chiseling bump 117 is provided with a plurality of chiseling knives 1171 which are distributed at equal intervals, each chiseling knife 1171 is of a triangular prism structure, two sides of the tip of each chiseling knife 1171 of the triangular prism structure are provided with chiseling knife edges, the chiseling knives 1171 scrape the surface of the waste concrete by utilizing the mutual movement between the movable jaw plate 106 and the static jaw plate 104, and the chiseling knives 1171 scrape, extrude and crush the waste concrete with high surface strength.
The invention uses a crusher 1 to crush large waste concrete with high surface hardness into small granular concrete, the crushed concrete surface is easy to form crushed sand, the small granular concrete surface has low hardness, the invention uses a grinder 2 to crush the granular concrete surface for the second time, the grinder 2 generates rolling extrusion to the granular concrete surface, and crushes the small granular materials mixed in the concrete;
the crusher 1 is arranged to crush the surface of the waste concrete, the waste concrete stored between the movable jaw plate 106 and the static jaw plate 104 is repeatedly extruded through the repeated swinging of the movable jaw plate 106, the concrete bears the extrusion force between the movable jaw plate 106 and the static jaw plate 104, the waste concrete is cracked through the extrusion force, a plurality of small particles are mixed on the cracked concrete surface, and the small particles are exposed on the concrete surface, so that the small particles mixed in the waste concrete can be crushed and screened conveniently.
The inner wall of the static jaw plate 104 and the inner wall of the movable jaw plate 106 are provided with a plurality of chipping lugs 117 which are distributed at equal intervals, through the mutual movement between the movable jaw plate 106 and the static jaw plate 104, the chipping lugs 117 generate extrusion force on the surface of concrete, the surface of waste concrete is chipped, cracks on the surface of the concrete are chipped through the chipping lugs 117, the chipping lugs 117 extend into the cracks on the surface of the concrete and are propped open from the cracks on the surface of the concrete to two sides, so that the large waste concrete can be quickly crushed, and the crushing efficiency is improved.
Example 2
Referring to fig. 1-9, there are shown schematic overall structural diagrams of a pretreatment method for raw materials for recycled concrete preparation, which are the same as those of the above example 1, and the differences therebetween are not described in this example:
the grinding machine 2 described in the step S2 includes a grinding cylinder 201, the grinding cylinder 201 is set to be a cylindrical structure, the grinding cylinder 201 is vertically fixed on the ground, a slot hole 211 is provided at the bottom of the grinding cylinder 201, feet are provided at two sides of the slot hole 211, a storage cavity 202 is provided inside the grinding cylinder 201, and a fan-shaped opening communicated with the storage cavity 202 is provided at the top end of the grinding cylinder 201; the bottom end of the material storage cavity 202 is provided with a material outlet cavity 215, the top of the material outlet cavity 215 is provided with a grinding wall 214 with a conical structure, the bottom of the material outlet cavity 215 is fixedly provided with a guide seat 210, the guide seat 210 is arranged into a disc-shaped structure with the middle protruding upwards, the corners of the guide seat 210 with the disc-shaped structure are provided with flower sheets, the flower sheets penetrate through the slotted holes 211 to extend outwards, gaps are formed between every two adjacent flower sheets, the bottom feet of the grinding cylinder 201 are conveniently fixed on the ground, the ground concrete flows out from the slotted holes 211 along the guide seat 210, the ground concrete is conveniently collected manually, the grinding efficiency of the concrete is improved, the guide seat 210 is fixed on the ground, the middle position of the top of the guide seat 210 is provided with an asynchronous motor 216;
the top centre of a circle position of grinding vessel 201 is fixed with back shaft 203, back shaft 203 passes storage cavity 202 downwards and stretches into in the top of ejection of compact chamber 215, the bottom of back shaft 203 is provided with the card platform 204 of ring structure, card platform 204 passes through the fixed embedding of sliding fit mode in joint groove 212, joint groove 212 sets up in the top of joint seat 213, joint seat 213 sets up to cylindrical structure, the bottom of joint seat 213 is provided with hinged-support 205, hinged-support 205 articulates there is articulated seat 206, articulated seat 206 sets up in the top of grinding ball 207, grinding ball 207 sets up to conical structure, the bottom of grinding ball 207 is provided with rotatable axostylus axostyle 208, it is rotatable on the disc outside of axostylus axostyle 208 to make grinding ball 207, be favorable to grinding ball 207 to rotating along the surface of grinding wall 214, pulverize the grinding to the concrete, the bottom mounting to axostyl.
According to the invention, the rocker 209 drives the grinding balls 207 to rotate at the top end of the discharge cavity 215, the grinding balls 207 are obliquely arranged, the grinding balls 207 rotate along the surface of the grinding wall 214, so that the grinding balls 207 rotate according to a conical body, the grinding balls 207 are attached to the surface of the grinding wall 214, granular concrete falls from the upper part, and the grinding balls 207 roll on the surface of the grinding wall 214 to grind and grind the concrete falling from the upper part, so that small particles mixed in the waste concrete are crushed, and the crushing effect on the waste concrete is improved.
The grinding balls 207 roll on the surface of the grinding wall 214, so that the grinding balls 207 rotate in a conical shape, concrete falling from the upper side flows through the grinding balls 207 and the surface of the grinding wall 214, and the grinding balls 207 and the surface of the grinding wall 214 are pressed to grind and crush granular concrete, thereby improving the crushing thoroughness of the waste concrete.
The grinding ball 207 comprises a grinding ball casing 2079, the grinding ball casing 2079 is set to be a cone with a hollow cavity inside, the inner wall of the grinding ball casing 2079 is provided with a plurality of circular holes 2076 which are distributed at equal intervals, the bottom of each circular hole 2076 is provided with a hollow groove 2071, the diameter of each hollow groove 2171 is larger than one half of the diameter of each circular hole 2076, the bottom of each hollow groove 2071 is provided with a telescopic film 2078, each telescopic film 2078 is a layer of wear-resistant rubber film fixed on the surface of the grinding ball 207, an internal ejector rod 2075 is convenient to push the rubber film to bulge and contract, and the concrete is convenient to be extruded and crushed for the second time;
a top rod 2075 is embedded in the hole of the round hole 2076 in a sliding fit manner, a spherical impact hammer 2072 is arranged at one end of the top rod 2075, the impact hammer 2072 extends into the hollow groove 2071, a limit block 2073 is arranged on the outer wall of the impact hammer 2072, and the limit block 2073 is embedded in the hollow groove 2071; a disc-shaped ejector rod base 2077 is arranged at the other end of the ejector rod 2075, a spring 2074 is arranged between the ejector rod base 2077 and the inner wall of the grinding ball casing 2079, and the spring 2074 is fixedly arranged on the outer circular surface of the ejector rod 2075; the shaft 208 penetrates through the grinding ball casing 2079 from the bottom of the grinding ball casing 2079 and extends into the hollow cavity, the top end of the shaft 208 is fixed at the top end of the grinding ball casing 2079, the outer wall of the shaft 208 is provided with a push block 217 of a semi-cone structure, the push block 217 faces the contact surface of the grinding ball 207 and the grinding wall 214, and the push block 217 pushes the impact hammer 2072 to axially extend and retract.
In the invention, the push block 217 of a semi-cone structure is arranged on the outer wall of the shaft rod 208 extending into the hollow cavity of the grinding ball casing 2079, the grinding ball casing 2079 rolls on the outer circular surface of the shaft rod 208 through the fixation of the shaft rod 208, the push block 217 sequentially pushes the ejector rod base 2077 on the grinding ball casing 2079 to extend upwards, the telescopic membrane 2078 on the surface of the grinding ball 207 is pushed to circularly bulge, the concrete on the attaching surface of the grinding ball 207 and the grinding wall 214 is crushed for the second time, and the crushing thoroughness of the concrete and small particles mixed in the concrete is improved.
The working principle of the invention is as follows: when the method is used for the pretreatment of raw materials for preparing recycled concrete, firstly, large waste concrete is crushed into small granules by a crusher 1, then the surfaces of the granules of concrete are crushed for the second time by a grinder 2, secondly, the grinder 2 drives a grinding ball 207 to rotate at the top end of a discharge cavity 215 by a rocker 209 in the process of crushing, the grinding ball 207 is obliquely placed, the grinding ball 207 rotates along the surface of a grinding wall 214 to make the grinding ball 207 rotate according to a cone, the grinding ball 207 is attached to the surface of the grinding wall 214 to form an attachment surface, the granules of concrete fall from the top, when passing through the attachment surface of the grinding ball 207 and the grinding wall 214, the grinding ball 207 rolls on the surface of the grinding wall 214 to grind and grind the concrete falling from the top, then, a pushing block 217 with a semi-cone structure is arranged on the outer wall of a shaft rod 208 extending into a hollow cavity of a grinding ball shell 2079, the shaft lever 208 is fixed, the grinding ball casing 2079 makes rotary motion on the outer circular surface of the shaft lever 208, the push block 217 sequentially pushes the ejector rod base 2077 on the grinding ball casing 2079 to extend upwards, pushes the telescopic membrane 2078 on the surface of the grinding ball 207 to circularly bulge, and performs secondary extrusion crushing on the concrete on the binding surface of the grinding ball 207 and the grinding wall 214, thereby completing the crushing of the concrete and small particles mixed in the concrete.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A pretreatment method for raw materials for preparing recycled concrete comprises the following steps:
s1, crushing, namely putting the waste concrete blocks into a crusher to be crushed to obtain granular concrete;
s2, grinding, namely putting the granular concrete obtained after crushing by the crusher in the step S1 into a grinder for grinding and grinding to obtain powdery concrete;
s3, screening, namely screening the concrete crushed and ground in the step S2 to sort coarse sand and fine sand contained in the concrete;
s4, preparing new concrete, stirring and mixing the coarse sand and the fine sand selected in the step S3, and adding cement, water, natural sand, natural macadam and pebbles to prepare the new concrete;
the crusher described in the above step S1 includes a main supporting plate, and is characterized in that: the main support plate is vertically fixed on the ground, a second side support plate vertical to the main support plate is fixed on the left side of the main support plate, and a first side support plate vertical to the main support plate is fixed on the right side of the main support plate;
the top end of the front wall of the main supporting plate is fixedly provided with a crank, the top end of the rear wall of the main supporting plate is provided with a flywheel, the flywheel and the crank are arranged at two ends of the same shaft rod, and the shaft rod is fixedly arranged at the top end of the main supporting plate;
the top end of the crank is provided with a deflector rod, the inner side wall of the second side supporting plate is fixedly provided with a static jaw plate, the static jaw plate is erected on the ground, the top end of the static jaw plate and the bottom end of the static jaw plate are both provided with oblique angles, the right side of the static jaw plate is provided with a movable jaw plate which is obliquely arranged, the top end of the movable jaw plate is provided with a sleeve, the sleeve is hinged to the deflector rod in a sliding fit mode, the right side of the movable jaw plate is provided with a movable jaw supporting frame, the right side of the bottom of the movable jaw supporting frame is close to the bottom end and provided with a pull rod base, and a thrust rod base is arranged above the pull rod base and positioned;
the pull rod base is hinged with a movable jaw pull rod, the top end of the movable jaw pull rod penetrates through the first side supporting plate and extends outwards, a check block is mounted at the top end of the first side supporting plate, a spring is arranged between the bottom of the check block and the right side wall of the first side supporting plate, and the spring is mounted on the outer wall of the movable jaw pull rod;
the top end of the thrust rod is hinged to the left side wall of the first side supporting plate;
a base is arranged at the bottom of the right side wall of the first side supporting plate, a motor is fixedly mounted at the top end of the base, a V belt wheel is mounted on an output shaft of the motor, and V belt transmission is arranged between the V belt wheel and the flywheel;
the grinding machine in the step S2 comprises a grinding cylinder, wherein the grinding cylinder is vertically fixed on the ground, a slotted hole is formed in the bottom of the grinding cylinder, a material storage cavity is formed in the grinding cylinder, and a fan-shaped opening communicated with the material storage cavity is formed in the top end of the grinding cylinder; the bottom end of the storage cavity is provided with a discharging cavity, the top of the discharging cavity is provided with a grinding wall with a conical structure, the bottom of the discharging cavity is fixedly provided with a guide seat, the guide seat is of a disc-shaped structure with the middle protruding upwards, the corners of the guide seat with the disc-shaped structure are provided with flower pieces, the flower pieces penetrate through the slotted holes and extend outwards, the middle position of the top of the guide seat is provided with an asynchronous motor, and an output shaft of the asynchronous motor is fixedly provided with a rocker;
a supporting shaft is fixed at the circle center position of the top end of the grinding cylinder, penetrates through the material storage cavity downwards and extends into the top end of the material discharge cavity, a clamping table of a circular ring structure is arranged at the bottom end of the supporting shaft, the clamping table is fixedly embedded into a clamping groove in a sliding fit mode, the clamping groove is formed in the top of the clamping seat, the clamping seat is of a cylindrical structure, a hinged support is arranged at the bottom end of the clamping seat, the hinged support is hinged to a hinged seat, the hinged seat is arranged at the top end of a grinding ball, a rotatable shaft rod is arranged at the bottom of the grinding ball, and the bottom end of the shaft rod is fixed at the top end of a rocker;
the grinding ball comprises a grinding ball shell, the grinding ball shell is a cone with a hollow cavity inside, the inner wall of the grinding ball shell is provided with a plurality of circular holes which are distributed at equal intervals, the bottom of each circular hole is provided with a hollow groove, and the bottom of each hollow groove is provided with a telescopic membrane;
a mandril is embedded in the hole of the round hole in a sliding fit mode, a spherical impact hammer is arranged at one end of the mandril and extends into the hollow groove, a limiting block is arranged on the outer wall of the impact hammer, a disc-shaped mandril base is arranged at the other end of the mandril, a spring is arranged between the mandril base and the inner wall of the grinding ball shell, and the spring is fixedly arranged on the outer circular surface of the mandril;
the shaft lever passes the grinding ball shell from the bottom of grinding ball shell and stretches into in the hollow cavity, the top of shaft lever is fixed on the top of grinding ball shell, the outer wall of shaft lever sets up the ejector pad of half cone structure, the ejector pad promotes the percussion hammer axial and stretches out and draws back.
2. The pretreatment method of raw materials for recycled concrete preparation according to claim 1, characterized in that: the inner wall of quiet hubei province board is provided with a plurality of equidistant distribution's the lug of carving on gold or silver, it is rectangular form, each to carve on gold or silver the lug the surface of carving on gold be provided with a plurality of equidistant distribution's the sword of carving on gold or silver, the sword of carving on gold or silver sets up to triangular prism structure, and the chisel knife tip two sides of triangular prism structure is provided with the cutting edge of carving on gold or silver.
3. The pretreatment method of raw materials for recycled concrete preparation according to claim 1, characterized in that: the inner wall of moving hubei province board is provided with a plurality of equidistant distribution's the lug of carving on gold or silver, it is rectangular form, each to carve on gold or silver the lug the surface of carving on gold or silver be provided with a plurality of equidistant distribution's the sword of carving on gold or silver, it is the triangular prism structure to engrave on gold or silver the sword of carving on gold or silver, and the chisel of triangular prism structure sword both sides are provided with the cutting edge of carving on gold or silver.
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| CN112295654B (en) * | 2020-10-30 | 2021-12-31 | 广东磊蒙重型机械制造有限公司 | Cone crusher convenient for discharging and using method thereof |
| CN116159844A (en) * | 2022-12-14 | 2023-05-26 | 韩冠福 | Building solid waste recycling device and application method thereof |
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