Preparation Process of Concrete Prepared from Manufactured Sand and Industrial Waste Residue

Abstract

The present invention belongs to the technical field of concrete preparation, and particularly relates to a preparation process for preparing concrete with manufactured sand and industrial waste residues. The preparation device used includes a mixing tank, and a conveying pipe is vertically arranged in the mixing tank. A first fixing ring is fixedly sleeved at a position near the top of the conveying pipe. The concrete prepared by the present invention includes slag cement, and the raw material composition of the slag cement includes: 18 - 23 parts of steel slag, 20 - 32 parts of blast furnace slag, 6 - 14 parts of Portland cement clinker, 1 - 2 parts of gypsum powder, 13 - 14 parts of industrial silicon dioxide, 2 - 4 parts of industrial aluminum oxide, 0.2 - 0.28 parts of naphthalene sulfonate, 0.01 - 0.04 parts of polycarboxylic acid, and 1.2 - 1.8 parts of polypropylene fiber. The present invention can improve the mixing effect of industrial waste residues and powder raw materials such as cement clumps with other raw materials in the concrete, and improve the preparation efficiency of the concrete.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete preparation, and particularly relates to a preparation process for preparing concrete with manufactured sand and industrial waste residues. Background Art

[0002] Sand is one of the main components of concrete, and its quality has an important impact on the workability of the concrete mixture, the physical and mechanical properties, and the durability of the hardened concrete. Sands used in concrete are divided into two categories: natural sand and manufactured sand. Among them, manufactured sand is made by removing soil from rocks, mechanically crushing them, and screening them into rock particles with a nominal particle size less than 5.00 mm. With the increasing need for infrastructure construction, manufactured sand gradually replaces river sand. When preparing concrete with manufactured sand, industrial waste residues are incorporated into the concrete to prepare green high-performance concrete, thereby meeting the needs of large-scale infrastructure construction.

[0003] The prior art proposes to use manufactured sand to replace river sand and incorporate a large amount of industrial waste residues to prepare green high-performance concrete to meet large-scale infrastructure construction. Aiming at the characteristics of manufactured sand with more powder content and poor particle shape, as well as the problems of green and high-quality construction of high-rise building concrete projects, through technical research and engineering practice, a high-performance water reducer with controllable air-entraining, low shrinkage, and low sensitivity, and a manufactured sand concrete with high volume stability and high stone powder content have been developed. An evaluation index system for the performance of manufactured sand high-performance concrete has been established, and efficient pumping construction of manufactured sand high-performance concrete in 150-meter-high-rise buildings has been achieved.

[0004] When incorporating industrial waste residues into concrete, in order to better improve the quality of concrete, it is necessary to adjust the addition ratio of the waste residues according to the actual situation during the concrete mixing process. However, some industrial waste residues such as fly ash and limestone powder are in powder form. Therefore, when adding these waste residues to the concrete being mixed, these waste residues are prone to absorbing water and agglomerating, making it difficult to fully mix with the concrete, and at the same time reducing the mixing efficiency of the concrete.

[0005] Therefore, it is necessary to invent a preparation process for preparing concrete with manufactured sand and industrial waste residues to solve the above problems. Summary of the Invention

[0006] In view of the above problems, the present invention provides a preparation process for preparing concrete with manufactured sand and industrial waste residues to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A preparation process for preparing concrete with manufactured sand and industrial waste residues, which is applied to a preparation device for preparing concrete with manufactured sand and industrial waste residues. The preparation device includes a mixing tank. A conveying pipe is vertically arranged in the mixing tank. A first fixing ring is fixedly sleeved at a position near the top of the conveying pipe. A plurality of first fixing rods are fixedly connected between the outer side of the first fixing ring and the inner wall of the mixing tank. A feeding assembly is arranged at a position near the top of the conveying pipe. A driving shaft is inserted through the axis of the conveying pipe. The bottom end of the driving shaft is vertically and rotatably connected to the bottom inner wall of the mixing tank. A U-shaped frame is rotatably sleeved at a position near the top of the driving shaft. The U-shaped frame is fixedly connected to the top of the mixing tank. The top end of the driving shaft is connected to a motor. A first auger blade is fixedly connected to the surface of the driving shaft located in the conveying pipe, and the diameter of the first auger blade matches the inner diameter of the conveying pipe. Two groups of discharge holes are distributed on the side wall of the conveying pipe from top to bottom, and the number of each group of discharge holes is multiple. A mixing assembly is distributed around each group of discharge holes. A plurality of scraping plates are fixedly connected to the position of the driving shaft at the bottom end of the conveying pipe, and the number of the scraping plates matches the number of each group of discharge holes. An L-shaped rod is fixedly connected to the top of the scraping plate. A second fixing ring is fixedly connected between the horizontal sections of the plurality of L-shaped rods. The second fixing ring is rotatably sleeved on the conveying pipe. A plurality of stirring rods are vertically and fixedly connected to the side of the vertical section of the L-shaped rod opposite to the conveying pipe. The bottom of the scraping plate is attached to the bottom inner wall of the mixing tank. One side of the mixing tank is connected to a feeding hopper, and the bottom of the mixing tank is connected to a discharge pipe;

[0009] The preparation process of the concrete includes the following steps:

[0010] Step 1: Add manufactured sand, cement, stones and water into the mixing tank through the feeding hopper;

[0011] Step 2: Start the motor, and make it drive the scraping plate and the stirring rod to rotate through the driving shaft, so as to stir the raw materials in the mixing tank;

[0012] Step 3: During the stirring process, add the screened industrial waste residues into the feeding assembly, and as the feeding assembly rotates, the industrial waste residues can evenly fall on the top of the raw materials in the mixing tank, so that they are stirred evenly under the stirring action of the mixing assembly and the stirring rod;

[0013] Step 4: After the stirring is completed, the mixed concrete can be discharged through the discharge pipe. The cement used is slag cement, and the raw material composition of the slag cement includes: 18 - 23 parts of steel slag, 20 - 32 parts of blast furnace slag, 6 - 14 parts of Portland cement clinker, 1 - 2 parts of gypsum powder, 13 - 14 parts of industrial silica, 2 - 4 parts of industrial aluminum oxide, 0.2 - 0.28 parts of naphthalene sulfonate, 0.01 - 0.04 parts of polycarboxylic acid, and 1.2 - 1.8 parts of polypropylene fiber.

[0014] In the manufactured sand concrete of the present invention, by adding silica and aluminum oxide, they can be hydrolyzed into sol during use. This sol can penetrate into the capillary pores inside the cement paste, block and cut off the capillary pores, increase the density of the cement, and thus improve the water resistance of the cement. In addition to acting as a water reducing agent, the added polycarboxylic acid reacts with the calcium ions in the gypsum to form calcium polycarboxylate, which can be enriched on the surface of the manufactured sand concrete, improving the surface strength and density of the manufactured sand concrete, and thus significantly improving the carbonation resistance of the manufactured sand concrete. The polypropylene fiber greatly improves the impermeability of the manufactured sand concrete.

[0015] Further, the feeding assembly includes an annular feeding groove sleeved on the outer ring of the conveying pipe near the top. The outer wall of the feeding groove is rotatably connected to the side wall of the mixing tank. The bottom of the feeding groove is fixedly connected to the horizontal sections of multiple L-shaped rods, and the inner bottom wall of the feeding groove is designed as a sieve. The bottom of the first fixing rod is vertically and fixedly connected with a toothed plate, and the bottom of the toothed plate is close to the inner bottom wall of the feeding groove.

[0016] Further, the mixing component includes multiple horizontally arranged rotating shafts, and the multiple rotating shafts are respectively distributed at the bottoms of multiple discharge holes. One end of the rotating shaft close to the conveying pipe is vertically and rotatably connected to the surface of the conveying pipe. The surface of the rotating shaft is fixedly connected with second auger blades. A fixed shaft is arranged at the top of the rotating shaft. One ends of multiple fixed shafts close to the conveying pipe are connected with a third fixing ring. The fixed shaft and the third fixing ring are rotatably connected, and the third fixing ring is rotatably sleeved on the conveying pipe. The other end of the fixed shaft is rotatably connected to the vertical section of the corresponding L-shaped rod. A baffle is fixedly connected to the fixed shaft. Multiple vertical shear holes are evenly formed through the baffle. Multiple groups of stirring rods are vertically and fixedly connected to the surface of the rotating shaft, and each group of stirring rods is opposite to the shear holes on the baffle. The number of stirring rods in each group is multiple, and the multiple stirring rods are evenly distributed in a ring on the surface of the rotating shaft. A counterweight is fixedly connected to the bottom edge of the baffle.

[0017] Further, multiple vertical friction strips are evenly distributed on one side of the baffle in the rotating direction. The multiple friction strips and the multiple shear holes are alternately distributed, and the friction strips are flush with the side of the counterweight.

[0018] Further, a plurality of inclined surface bumps are annularly distributed on the side wall of the feeding tank. The inclined surface bumps are fixedly connected to the feeding tank. The plurality of inclined surface bumps are rotationally symmetric about the driving shaft, and the inclined surfaces of the inclined surface bumps face the rotation direction of the driving shaft. A plurality of L-shaped elastic pieces are fixedly connected to the side wall of the mixing tank. A knocking ball is fixedly connected to the bottom end of the elastic piece. In the initial state, the knocking ball is close to the inner wall of the feeding tank, and the knocking ball and the inclined surface bump are located on the same moving plane.

[0019] Further, a limiting ring is fixedly connected to the top of the plurality of scraping plates. The limiting ring is rotatably connected to the bottom edge of the conveying pipe.

[0020] Further, the vertical section of the L-shaped rod is designed with an inclined surface on the side close to the rotation direction of the driving shaft. The vertical section of the L-shaped rod is close to the inner side wall of the mixing tank.

[0021] Further, the bottom edge of the scraping plate is inclined towards the direction of rotation of the driving shaft, and the length of the scraping plate matches the inner radius of the mixing tank.

[0022] Further, the end of the rotating shaft away from the conveying pipe is close to the vertical section of the L-shaped rod, and the second auger blade uniformly covers the surface of the rotating shaft.

[0023] The technical effects and advantages of the present invention:

[0024] 1. By providing a mixing component in the present invention, during the operation of the mixing component, the mixing component can mix the concrete in the vertical direction and also in the horizontal direction, so that the concrete is mixed more evenly. In addition, the mixing component can also perform a shearing operation on the concrete in contact with it, so that the agglomerated industrial waste residue or cement mass can be better broken up, thereby improving the mixing effect of the industrial waste residue and cement mass and other powder raw materials with other raw materials in the concrete and enhancing the preparation efficiency of the concrete;

[0025] 2. By providing a feeding component in the present invention, when the powdery industrial waste residue is poured into the feeding tank from a certain position at the opening of the feeding tank, the feeding tank can drive the industrial waste residue to contact the toothed plate, so that the industrial waste residue can be scraped flat and spread on the inner bottom wall of the feeding tank, and then can be evenly scattered on the top of the concrete raw materials in the mixing tank through the feeding tank, reducing the agglomeration phenomenon caused by the industrial waste residue gathering in the same place. At the same time, the evenly distributed industrial waste residue can also improve the mixing efficiency with the concrete, thereby enhancing the mixing efficiency of the concrete;

[0026] 3. In the present invention, by providing a knocking ball, during the rotation of the feeding trough, the knocking ball can strike the inner wall of the feeding trough under the combined action of the elastic sheet and the inclined surface bump, thereby vibrating the industrial waste residue in the feeding trough, so that the industrial waste residue can fall into the stirring tank through the feeding trough faster. At the same time, the vibration generated by the knocking ball can also vibrate the remaining industrial waste residue out of the feeding trough, avoiding the residue of industrial waste residue in the feeding trough. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the first overall schematic diagram of the present invention;

[0028] Figure 2 is the second overall schematic diagram of the present invention;

[0029] Figure 3 is the three-dimensional schematic diagram of all structures of the present invention except the motor and the U-shaped frame;

[0030] Figure 4 in the present invention Figure 3 is the enlarged view of part A;

[0031] Figure 5 is the three-dimensional schematic diagram of all structures inside the stirring tank of the present invention;

[0032] Figure 6 is the three-dimensional schematic diagram of the drive shaft, the first auger blade, the scraping plate and the limiting ring of the present invention;

[0033] Figure 7 is the three-dimensional schematic diagram of the rotating shaft, the second auger blade and the lever of the present invention;

[0034] Figure 8 is the three-dimensional schematic diagram of part of the mixing component of the present invention;

[0035] Figure 9 is the three-dimensional schematic diagram of the L-shaped rod, the second fixing ring and the stirring rod of the present invention.

[0036] In the figure: 1. Stirring tank; 2. Delivery pipe; 3. First fixing ring; 4. First fixing rod; 5. Feeding component; 51. Feeding trough; 52. Tooth plate; 6. Drive shaft; 7. U-shaped frame; 8. Motor; 9. First auger blade; 10. Discharge hole; 11. Mixing component; 111. Rotating shaft; 112. Second auger blade; 113. Fixed shaft; 114. Third fixing ring; 115. Paddle; 116. Shearing hole; 117. Lever; 118. Counterweight; 12. Scraping plate; 13. L-shaped rod; 14. Second fixing ring; 15. Stirring rod; 16. Feeding hopper; 17. Discharge pipe; 18. Friction strip; 19. Inclined surface bump; 20. Elastic sheet; 21. Knocking ball; 22. Limiting ring. DETAILED DESCRIPTION OF THE INVENTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0038] The present invention provides Figures 1 to 9 The preparation process of preparing concrete from machine-made sand and industrial waste slag shown in the figure is applied to the preparation device of preparing concrete from machine-made sand and industrial waste slag, the preparation device comprising a mixing tank 1, a conveying pipe 2 is vertically arranged in the mixing tank 1, a first fixing ring 3 is fixedly sleeved at a position near the top of the conveying pipe 2, a plurality of first fixing rods 4 are fixedly connected between the outer side of the first fixing ring 3 and the inner wall of the mixing tank 1, a feeding assembly 5 is arranged near the top of the conveying pipe 2, a driving shaft 6 is inserted through the axis of the conveying pipe 2, the bottom end of the driving shaft 6 is vertically rotatably connected to the bottom inner wall of the mixing tank 1, a U-shaped frame 7 is rotatably sleeved at a position near the top of the driving shaft 6, the U-shaped frame 7 is fixedly connected to the top of the mixing tank 1, a motor 8 is connected to the top of the driving shaft 6, a first auger blade 9 is fixedly connected to the surface of the driving shaft 6 located in the conveying pipe 2, and the diameter of the first auger blade 9 matches the inner diameter of the conveying pipe 2, and two groups of discharge holes 10 are distributed on the side wall of the conveying pipe 2 from top to bottom, and each group of discharge holes 10 The number of the plurality of discharge holes 10 is multiple, and a mixing assembly 11 is distributed around the periphery of each group of the discharge holes 10. The driving shaft 6 is located at the bottom end of the conveying pipe 2 and is fixedly connected to a plurality of scrapers 12, and the number of the scrapers 12 matches the number of each group of discharge holes 10. The top of the scraper 12 is fixedly connected to an L-shaped rod 13, and the side of the vertical section of the L-shaped rod 13 close to the rotation direction of the driving shaft 6 is designed as an inclined surface, and the vertical section of the L-shaped rod 13 is close to the side inner wall of the stirring tank 1, and the horizontal sections of the plurality of L-shaped rods 13 are fixedly connected to each other. A second fixing ring 14 is fixedly connected, and the second fixing ring 14 is rotatably sleeved on the conveying pipe 2. A plurality of stirring rods 15 are vertically fixedly connected to the side of the vertical section of the L-shaped rod 13 opposite to the conveying pipe 2. The bottom of the scraper 12 is in contact with the bottom inner wall of the stirring tank 1. A feed hopper 16 is connected to one side of the stirring tank 1. A discharge pipe 17 is connected to the bottom of the stirring tank 1. The bottom edge of the scraper 12 is inclined toward the direction of rotation of the drive shaft 6, and the length of the scraper 12 matches the inner radius of the stirring tank 1.

[0039] The specific preparation process of the concrete comprises the following steps:

[0040] Step 1: Add machine-made sand, cement, gravel and water into the mixing tank 1 through the feed hopper 16;

[0041] Step 2: Start the motor 8 to drive the scraper 12 and the stirring rod 15 to rotate through the driving shaft 6, thereby stirring the raw materials in the stirring tank 1;

[0042] Step 3: During the stirring process, add the screened industrial waste residue into the feeding component 5. As the feeding component 5 rotates, the industrial waste residue can evenly fall on the top of the raw materials in the stirring tank 1, so that it can be evenly stirred under the stirring action of the mixing component 11 and the stirring rod 15;

[0043] Step 4: After the stirring is completed, the mixed concrete can be discharged through the discharge pipe 17. The cement is slag cement, and the raw material composition of the slag cement includes: 18 - 23 parts of steel slag, 20 - 32 parts of blast furnace slag, 6 - 14 parts of Portland cement clinker, 1 - 2 parts of gypsum powder, 13 - 14 parts of industrial silica, 2 - 4 parts of industrial aluminum oxide, 0.2 - 0.28 parts of naphthalene sulfonate, 0.01 - 0.04 parts of polycarboxylic acid, and 1.2 - 1.8 parts of polypropylene fiber.

[0044] In the process of preparing the above concrete, after the concrete raw materials are added to the stirring tank 1 through the feed hopper 16, with the start of the motor 8, the drive shaft 6 can drive the L-shaped rod 13 and the stirring rod 15 to move through the scraper 12, so as to stir the concrete raw materials in the stirring tank 1. At the same time, the first auger blade 9 on the drive shaft 6 can cooperate with the conveying pipe 2 to continuously convey the concrete at the bottom of the stirring tank 1 upward, thereby accelerating the mixing efficiency of the whole concrete in the stirring tank 1. When it is necessary to add powdered industrial waste residue to the stirring tank 1, as the industrial waste residue is poured into the feeding component 5, the industrial waste residue can evenly fall on the top of the concrete. As the drive shaft 6 continues to rotate, the mixing component 11 can rotate around the conveying pipe 2 driven by the L-shaped rod 13, so as to mix the concrete removed from the discharge hole 10 not only vertically but also horizontally, thereby making the concrete more evenly mixed;

[0045] In addition, during the operation of the mixing component 11, the mixing component 11 can also perform a shearing operation on the concrete in contact with it, so that the agglomerated industrial waste residue or cement mass can be better broken up, thereby improving the mixing effect of the industrial waste residue and cement mass and other powder raw materials with other raw materials in the concrete and enhancing the preparation efficiency of the concrete;

[0046] When the concrete is prepared, as the discharge pipe 17 is opened, the concrete can be discharged from the stirring tank 1 through the discharge pipe 17. And during the process of discharging the concrete, the drive shaft 6 can be kept rotating to drive the scraper 12 and the L-shaped rod 13 to move. As the L-shaped rod 13 and the scraper 12 move, the L-shaped rod 13 and the scraper 12 can scrape along the side wall and the bottom inner wall of the stirring tank 1 respectively, so as to scrape off the residual concrete and finally discharge it through the discharge pipe 17, avoiding the waste of concrete.

[0047] Such asFigures 1 to 5 As shown, the feeding assembly 5 includes an annular feeding groove 51, and the feeding groove 51 is sleeved on the outer ring near the top of the conveying pipe 2. The outer wall of the feeding groove 51 is rotatably connected to the side wall of the mixing tank 1. The bottom of the feeding groove 51 is fixedly connected to the horizontal sections of a plurality of L-shaped rods 13, and the inner wall of the bottom of the feeding groove 51 is designed as a sieve. The bottom of the first fixing rod 4 is vertically and fixedly connected with a toothed plate 52, and the bottom of the toothed plate 52 is close to the inner wall of the bottom of the feeding groove 51;

[0048] When pouring the powdered industrial waste residue into the feeding groove 51 from a certain position at the opening of the feeding groove 51, with the rotation of the driving shaft 6, the feeding groove 51 can drive the industrial waste residue inside it to move under the drive of the L-shaped rods 13. Since the toothed plate 52 is in a static state, when the industrial waste residue in the feeding groove 51 contacts the toothed plate 52, the toothed plate 52 can scrape and spread the industrial waste residue on the inner wall of the bottom of the feeding groove 51, so that the industrial waste residue can evenly pass through the feeding groove 51 and fall on the top of the concrete raw materials in the mixing tank 1, thereby reducing the phenomenon of agglomeration caused by the accumulation of industrial waste residue in the same place. At the same time, the evenly distributed industrial waste residue can also improve the mixing efficiency with the concrete, and thus improve the mixing efficiency of the concrete.

[0049] As Figures 1 to 8 shown, the mixing component 11 includes a plurality of horizontally arranged rotating shafts 111, and the plurality of rotating shafts 111 are distributed one by one at the bottom of a plurality of discharge holes 10. One end of the rotating shaft 111 close to the conveying pipe 2 is vertically and rotatably connected to the surface of the conveying pipe 2. A second auger blade 112 is fixedly connected to the surface of the rotating shaft 111. A fixed shaft 113 is arranged at the top of the rotating shaft 111. One ends of the plurality of fixed shafts 113 close to the conveying pipe 2 are connected with a third fixing ring 114. The fixed shaft 113 and the third fixing ring 114 are rotatably connected, and the third fixing ring 114 is rotatably sleeved on the conveying pipe 2. The other end of the fixed shaft 113 is rotatably connected to the vertical section of the corresponding L-shaped rod 13. A baffle 115 is fixedly connected to the fixed shaft 113. A plurality of vertical shear holes 116 are evenly formed through the baffle 115. A plurality of groups of baffle rods 117 are vertically and fixedly connected to the surface of the rotating shaft 111, and each group of baffle rods 117 is opposite to the shear holes 116 on the baffle 115. The number of each group of baffle rods 117 is multiple, and the multiple baffle rods 117 are evenly distributed in a circular shape on the surface of the rotating shaft 111. A counterweight 118 is fixedly connected to the bottom edge of the baffle 115. A plurality of vertical friction strips 18 are evenly distributed on one side of the rotating direction of the baffle 115. The plurality of friction strips 18 and the plurality of shear holes 116 are alternately distributed, and the friction strips 18 are flush with the side of the counterweight 118. One end of the rotating shaft 111 away from the conveying pipe 2 is close to the vertical section of the L-shaped rod 13, and the second auger blade 112 evenly covers the surface of the rotating shaft 111;

[0050] During the process of concrete mixing, with the rotation of the drive shaft 6, the first auger blade 9 can convey the concrete at the bottom in the mixing tank 1 upward along the conveying pipe 2, while the concrete outside the conveying pipe 2 flows downward as a whole, thus forming a cycle. During the upward movement of the concrete in the conveying pipe 2, part of the concrete can be discharged out of the conveying pipe 2. At the same time, with the rotation of the drive shaft 6, multiple scraping plates 12 and L-shaped rods 13 can rotate around the drive shaft 6 under the action of the drive shaft 6. With the movement of the L-shaped rod 13, the deflector plate 115 can gradually approach the rotating shaft 111 driven by the L-shaped rod 13. And when the deflector plate 115 approaches the rotating shaft 111, the lever 117 on the rotating shaft 111 can be inserted into the shear hole 116 on the deflector plate 115. Thus, with the continuous movement of the L-shaped rod 13, the shear hole 116 on the deflector plate 115 can pull the rotating shaft 111 to rotate through the lever 117. With the rotation of the rotating shaft 111, the second auger blade 112 on the rotating shaft 111 can laterally convey the concrete outside the conveying pipe 2 away from the conveying pipe 2 under the drive of the rotating shaft 111, thereby promoting the horizontal mixing operation of the concrete in the mixing tank 1;

[0051] In addition, during the contact between the deflector plate 115 and the rotating shaft 111, as the deflector plate 115 slides along the surface of the second auger blade 112 on the rotating shaft 111, the deflector plate 115 can gradually deflect its bottom edge upward under the blockage of the second auger blade 112. And the deflector plate 115 can keep in contact with the surface of the rotating shaft 111 under the action of the counterweight 118. With the gradual upward deflection of the deflector plate 115, the deflector plate 115 can stir the concrete outside the conveying pipe 2 upward, so as to collide with the concrete flowing downward as a whole outside the conveying pipe 2, thereby accelerating the mutual mixing of the concrete at different height positions in the mixing tank 1;

[0052] In addition, during the friction between the deflector plate 115 and the second auger blade 112 on the surface of the rotating shaft 111, the friction strips 18 and the shear holes 116 on the deflector plate 115 can cooperate with the second auger blade 112 to perform a shearing operation on the concrete in contact with it, so that the agglomerated industrial waste residue or cement mass can be better dispersed, thereby improving the mixing effect of the industrial waste residue and cement mass and other powder raw materials with other raw materials in the concrete and enhancing the preparation efficiency of the concrete.

[0053] Such as Figures 1 to 4As shown, a plurality of inclined surface bumps 19 are annularly distributed on the side wall of the feed tank 51. The inclined surface bumps 19 are fixedly connected to the feed tank 51. The plurality of inclined surface bumps 19 are rotationally symmetric about the drive shaft 6, and the inclined surface of the inclined surface bump 19 faces the rotation direction of the drive shaft 6. A plurality of L-shaped elastic pieces 20 are fixedly connected to the side wall of the mixing tank 1. The bottom end of the elastic piece 20 is fixedly connected with a knocking ball 21. In the initial state, the knocking ball 21 is close to the inner wall of the feed tank 51, and the knocking ball 21 and the inclined surface bump 19 are located on the same moving plane;

[0054] By providing the inclined surface bumps 19, during the rotation of the feed tank 51, the plurality of inclined surface bumps 19 can gradually approach the knocking ball 21 under the drive of the feed tank 51. When the inclined surface of the inclined surface bump 19 contacts the knocking ball 21, with the continuous rotation of the feed tank 51, the inclined surface bump 19 can gradually push the knocking ball 21, so as to drive the knocking ball 21 and the elastic piece 20 to deflect towards the direction close to the drive shaft 6. With the further rotation of the feed tank 51, when the knocking ball 21 is separated from the inclined surface bump 19, the knocking ball 21 can strike the inner wall of the feed tank 51 under the action of the elastic piece 20, so as to vibrate the industrial waste residue in the feed tank 51, and further enable the industrial waste residue to pass through the feed tank 51 and fall into the mixing tank 1 faster. At the same time, the vibration generated by the knocking ball 21 can also vibrate the remaining industrial waste residue out of the feed tank 51 to avoid the residue of industrial waste residue in the feed tank 51.

[0055] As Figure 5 and Figure 6 As shown, a limiting ring 22 is fixedly connected to the top of the plurality of scraping plates 12. The limiting ring 22 is rotatably connected to the bottom edge of the conveying pipe 2;

[0056] By providing the limiting ring 22, during the rotation of the drive shaft 6, the limiting ring 22 can rotatably support the bottom end of the conveying pipe 2, so as to ensure the stability of the bottom end of the conveying pipe 2.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A process for preparing concrete using machine-made sand and industrial waste residue, characterized in that: A preparation device for preparing concrete from machine-made sand and industrial waste residue, the preparation device comprising a mixing tank (1), a conveying pipe (2) being vertically arranged in the mixing tank (1), a first fixing ring (3) being fixedly sleeved at a position near the top of the conveying pipe (2), a plurality of first fixing rods (4) being fixedly connected between the outer side of the first fixing ring (3) and the inner wall of the mixing tank (1), a feeding assembly (5) being arranged at a position near the top of the conveying pipe (2), a driving shaft (6) being inserted through the axis of the conveying pipe (2), the bottom end of the driving shaft (6) being vertically rotatably connected to the bottom inner wall of the mixing tank (1), a U-shaped frame (7) being rotatably sleeved at a position near the top of the driving shaft (6), the U-shaped frame (7) being fixedly connected to the top of the mixing tank (1), a motor (8) being connected to the top of the driving shaft (6), a first auger blade (9) being fixedly connected to the surface of the driving shaft (6) located in the conveying pipe (2), and the diameter of the first auger blade (9) being equal to the diameter of the conveying pipe (2). The conveying pipe (2) has an inner diameter that matches the inner diameter of the conveying pipe (2), two groups of discharge holes (10) are distributed on the side wall from top to bottom, and the number of each group of discharge holes (10) is multiple, and a mixing component (11) is distributed on the periphery of each group of discharge holes (10), and the driving shaft (6) is located at the bottom end of the conveying pipe (2) and is fixedly connected to a plurality of scrapers (12), and the number of scrapers (12) matches the number of each group of discharge holes (10), and the top of the scraper (12) is fixedly connected to an L-shaped rod (13), and the plurality of A second fixing ring (14) is fixedly connected between the horizontal sections of the L-shaped rods (13), the second fixing ring (14) is rotatably sleeved on the conveying pipe (2), a plurality of stirring rods (15) are vertically fixedly connected to the side of the vertical section of the L-shaped rod (13) opposite to the conveying pipe (2), the bottom of the scraper (12) is in contact with the bottom inner wall of the stirring tank (1), one side of the stirring tank (1) is connected to a feed hopper (16), and the bottom of the stirring tank (1) is connected to a discharge pipe (17);The mixing assembly (11) comprises a plurality of horizontally arranged rotating shafts (111), and the plurality of rotating shafts (111) are distributed one by one at the bottom of the plurality of discharge holes (10), one end of the rotating shaft (111) close to the conveying pipe (2) is vertically rotatably connected to the surface of the conveying pipe (2), a second auger blade (112) is fixedly connected to the surface of the rotating shaft (111), a fixed shaft (113) is arranged on the top of the rotating shaft (111), a third fixed ring (114) is connected between the ends of the plurality of fixed shafts (113) close to the conveying pipe (2), the fixed shaft (113) and the third fixed ring (114) are rotatably connected, and the third fixed ring (114) rotates The fixed shaft (113) is sleeved on the conveying pipe (2), the other end of the fixed shaft (113) is rotatably connected to the vertical section of the corresponding L-shaped rod (13), the fixed shaft (113) is fixedly connected to a shift plate (115), and the shift plate (115) is evenly penetrated with a plurality of vertical shear holes (116), the surface of the rotating shaft (111) is vertically fixedly connected to a plurality of groups of shift rods (117), and each group of shift rods (117) is opposite to the shear holes (116) on the shift plate (115), the number of each group of shift rods (117) is multiple, and the plurality of shift rods (117) are evenly distributed in an annular shape on the surface of the rotating shaft (111), and the bottom edge of the shift plate (115) is fixedly connected to a counterweight (118); The feed assembly (5) comprises an annular feed trough (51), the feed trough (51) being sleeved on the outer ring of the conveying pipe (2) near the top, the outer wall of the feed trough (51) being rotatably connected to the side wall of the stirring tank (1), the bottom of the feed trough (51) being fixedly connected to the horizontal sections of a plurality of L-shaped rods (13), and the bottom inner wall of the feed trough (51) being designed as a screen, the bottom of the first fixed rod (4) being vertically fixedly connected to a tooth plate (52), and the bottom of the tooth plate (52) being close to the bottom inner wall of the feed trough (51), a plurality of vertical friction strips (18) being evenly distributed on one side of the rotation direction of the paddle (115), the plurality of friction strips (18) being alternately distributed with the plurality of shear holes (116), and the friction strips (18) being flush with the same side as the counterweight (118), and a plurality of inclined protrusions (19) being annularly distributed on the side wall of the feed trough (51), The inclined surface protrusion (19) is fixedly connected to the feed trough (51), and the plurality of inclined surface protrusions (19) are rotationally symmetrical about the drive shaft (6), and the inclined surface of the inclined surface protrusion (19) is directly opposite to the rotation direction of the drive shaft (6). A plurality of L-shaped spring pieces (20) are fixedly connected to the side wall of the mixing tank (1), and a knocking ball (21) is fixedly connected to the bottom end of the spring piece (20). In an initial state, the knocking ball (21) is close to the inner wall of the feed trough (51), and the knocking ball (21) and the inclined surface protrusion (19) are located on the same motion plane. The tops of the plurality of scrapers (12) are fixedly connected to a limit ring (22), and the limit ring (22) is rotatably connected to the bottom edge of the conveying pipe (2). The side of the vertical section of the L-shaped rod (13) close to the rotation direction of the drive shaft (6) is designed as an inclined surface, and the vertical section of the L-shaped rod (13) is close to the inner wall of the side of the mixing tank (1); The preparation process of the concrete comprises the following steps: Step 1: adding machine-made sand, cement, gravel and water into the mixing tank (1) through the feed hopper (16); Step 2: starting the motor (8) so that the motor (8) drives the scraper (12) and the stirring rod (15) to rotate via the driving shaft (6), thereby stirring the raw materials in the stirring tank (1); Step 3: During the stirring process, the screened industrial waste residue is added to the feed component (5), and as the feed component (5) rotates, the industrial waste residue can evenly fall on the top of the raw materials in the stirring tank (1), so that the industrial waste residue is evenly stirred under the stirring action of the mixing component (11) and the stirring rod (15); Step 4: After the mixing is completed, the mixed concrete is discharged through a discharge pipe (17), wherein the cement is slag cement, and the raw material composition of the slag cement includes: 18-23 parts of steel slag, 20-32 parts of blast furnace slag, 6-14 parts of Portland cement clinker, 1-2 parts of gypsum powder, 13-14 parts of industrial silicon dioxide, 2-4 parts of industrial aluminum oxide, 0.2-0.28 parts of naphthalene sulfonate, 0.01-0.04 parts of polycarboxylic acid, and 1.2-1.8 parts of polypropylene fiber.

2. The process for preparing concrete from machine-made sand and industrial waste residue according to claim 1, characterized in that: The bottom edge of the scraper (12) is inclined towards the direction of rotation of the drive shaft (6), and the length of the scraper (12) matches the inner radius of the mixing tank (1).

3. The process for preparing concrete from machine-made sand and industrial waste residue according to claim 1, characterized in that: One end of the rotating shaft (111) away from the conveying pipe (2) is close to the vertical section of the L-shaped rod (13), and the second auger blades (112) evenly cover the surface of the rotating shaft (111).

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