Low-carbon machine-made sand self-compacting concrete production line

Abstract

The invention provides a low-carbon machine-made sand self-compacting concrete production line which comprises an aggregate supply device, a powder supply device and a stirring device, and the aggregate supply device comprises an aggregate batcher, a flat belt conveyor arranged at the bottom of the aggregate batcher and an inclined belt conveyor connected with the flat belt conveyor. The powder feeding device comprises a powder bin and a spiral conveyor connected with a discharging port of the powder bin. The stirring device comprises a building frame, an aggregate temporary storage hopper arranged on the building frame, a powder scale arranged on the building frame, and a stirring main machine arranged on the building frame and located below the powder scale, wherein an inlet of the aggregate temporary storage hopper is located below an outlet of the inclined belt conveyor, and an inlet of the powder scale is located below an outlet of the spiral conveyor. A powder inlet is formed in the top face of the stirring main machine, and a powder screening machine located above the powder inlet is arranged on the top face of the stirring main machine. The low-carbon machine-made sand self-compacting concrete production line realizes automatic production of concrete.

Description

Technical Field

[0001] The invention relates to the technical field of concrete production lines, in particular to a low-carbon machine-made sand self-compacting concrete production line. Background Art

[0002] Self-compacting concrete is a type of high-performance concrete. It has high fluidity without dispersion or water seepage. It can fill the space in the formwork by its own weight. It has good filling properties for dense steel bars and complex structures. It can form a dense concrete structure without vibration (or slight tamping), and it also has good mechanical properties and durability.

[0003] As a kind of slurry-rich concrete, self-compacting concrete generally uses a higher amount of cementitious materials. The same grade of self-compacting concrete uses an average of about 100kg / m3 more cementitious materials than ordinary concrete. The large-scale use of cementitious materials has also led to a sharp increase in CO2 emissions from self-compacting concrete, and the cost of cementitious materials has remained high. On the other hand, with the increasing use of concrete and the strengthening of environmental protection efforts, natural sand can no longer meet the demand for concrete use. The use of low-carbon machine-made sand instead of natural sand has become an inevitable trend of development.

[0004] The existing Chinese patent application with publication number CN107777936A discloses a self-compacting concrete, including cement, mineral powder, fly ash, sand, crushed stone, water, and admixtures. The preparation method of the self-compacting concrete is to put sand, cement, mineral powder, fly ash, and admixtures into a mixing main machine, and then stir the concrete. It should be ensured that the concrete is stirred evenly, water is added during the stirring process, and the concrete stirring time is appropriately extended.

[0005] The above-mentioned prior art solutions have the following defects: At present, the above-mentioned self-compacting concrete is usually weighed manually and put into a mixing main machine for mixing, which has the problem of low production efficiency. Summary of the invention

[0006] The problem to be solved by the present invention is to provide a low-carbon machine-made sand self-compacting concrete production line in view of the above-mentioned deficiencies existing in the prior art, which solves the problem of low production efficiency existing in the prior art.

[0007] The above-mentioned inventive object of the present invention is achieved through the following technical scheme: a low-carbon machine-made sand self-compacting concrete production line, comprising an aggregate supply device, a powder supply device, and a stirring device, wherein the aggregate supply device comprises an aggregate batcher, a flat belt conveyor arranged at the bottom of the aggregate batcher, and an inclined belt conveyor connected to the flat belt conveyor, the powder supply device comprises a powder silo, and a screw conveyor connected to the discharge port of the powder silo, the stirring device comprises a truss, an aggregate temporary storage hopper arranged on the truss and having an inlet located below the outlet of the inclined belt conveyor, a powder scale arranged on the truss and having an inlet located below the outlet of the screw conveyor, and a stirring main machine arranged on the truss and located below the powder scale, an aggregate pipe aligned with the outlet of the aggregate temporary storage hopper is arranged on the top surface of the stirring main machine, a powder inlet is opened on the top surface of the stirring main machine, and a powder screening machine located above the powder inlet is arranged on the top surface of the stirring main machine.

[0008] The present invention is further configured as follows: the powder screening machine includes a frame with a screening chamber connected to a powder inlet, a rotary screen drum is rotatably arranged in the screening chamber, the rotary screen drum includes an active turntable, a driven turntable, a screen drum body arranged between the active turntable and the driven turntable and having a rotary screen cavity inside, a feed pipe with a feed channel is arranged on the outer side wall of the screen drum body, the feed channel is connected to the rotary screen cavity, a conduit rack is arranged on the top surface of the frame, and a conduit hole aligned with the feed channel is opened on the conduit rack.

[0009] The present invention is further configured as follows: a mounting plate connected to the feed pipe is arranged in the feed channel, a plurality of material passing holes are opened on the mounting plate, a guide rod hole is opened in the middle of the mounting plate, a lower convex cylinder is arranged on the end surface of the mounting plate facing the rotary screen cavity, a lower cylinder groove connected to the guide rod hole is opened on the end surface of the lower convex cylinder facing the rotary screen cavity, an upper convex cylinder is arranged on the end surface of the mounting plate away from the rotary screen cavity, an upper cylinder groove connected to the guide rod hole is opened on the top surface of the upper convex cylinder, and a An upper cylinder cover is provided for closing the upper cylinder groove, a vertical sliding rod slidably matched with the guide rod hole is passed through the guide rod hole, a vertical sliding block slidably matched with the lower cylinder groove is coaxially arranged at one end of the vertical sliding block close to the rotary screen chamber, a vertical plug is provided at the bottom of the vertical sliding block, and the vertical plug is slidably arranged at the bottom of the feed channel, a push rod electric cylinder is provided on the end surface of the upper cylinder cover facing the upper cylinder groove, the piston rod of the push rod electric cylinder is connected to the end surface of the vertical sliding bar away from the rotary screen chamber, and a battery is provided in the upper cylinder groove.

[0010] The present invention is further configured as follows: a return spring is sleeved on the vertical sliding rod, the upper end of the return spring is fixedly connected to the top wall of the lower cylinder groove, and the lower end of the return spring is fixedly connected to the end surface of the vertical sliding block away from the rotating screen cavity.

[0011] The present invention is further configured as follows: a guide sliding hole is opened on the outer wall of the catheter rack, the guide sliding hole is connected with the catheter hole, a vertical sliding tube with a material guide channel is slidably arranged in the catheter hole, the material guide channel is aligned with the feed channel, a guide sliding block slidingly matched with the guide sliding hole is arranged on the outer wall of the vertical sliding tube, a rodless electric cylinder is arranged on the outer wall of the catheter rack, and the piston rod of the rodless electric cylinder is connected to the guide sliding block.

[0012] The present invention is further configured as follows: the frame includes a lower frame body, a middle frame, and an upper frame body which are arranged in sequence from bottom to top; a connecting plate which is screwed to the top surface of the mixing main unit is arranged at the bottom of the outer wall of the lower frame body; a lower connecting frame plate which is screwed to the bottom surface of the middle frame is arranged at the top of the outer wall of the lower frame body; and an upper connecting frame plate which is screwed to the top surface of the middle frame is arranged at the bottom of the outer wall of the upper frame body.

[0013] The present invention is further configured as follows: an active through hole and a driven through hole are respectively provided on the two opposite outer side walls of the upper frame body, a driving shaft coaxially connected to the active turntable is provided through the active through hole, a driving motor is provided at the end of the active shaft away from the active turntable, an active bearing seat for supporting the active shaft is provided on the outside of the frame, a driven shaft coaxially connected to the driven turntable is provided through the driven through hole, and a driven bearing seat for supporting the driven shaft is provided on the outside of the frame.

[0014] The present invention is further configured as follows: an active vertical plate is arranged on the side wall of the lower frame body close to the active perforation, an active horizontal plate is arranged on the end surface of the active vertical plate facing away from the lower frame body, active ribs are arranged between the side wall of the active vertical plate and the bottom surface of the active horizontal plate, an active frame is arranged on the top surface of the active horizontal plate, and the active bearing seat is arranged on the top surface of the active frame.

[0015] The present invention is further configured as follows: a driven vertical plate is arranged on the side wall of the lower frame body close to the driven through hole, a driven horizontal plate is arranged on the end surface of the driven vertical plate facing away from the lower frame body, driven rib plates are arranged between the side wall of the driven vertical plate and the bottom surface of the driven horizontal plate, a driven frame is arranged on the top surface of the driven horizontal plate, and the driven bearing seat is arranged on the top surface of the driven frame.

[0016] The present invention is further configured as follows: the truss includes a plurality of lower legs, a lower mounting platform arranged on the top of the lower legs, a lower diagonal brace arranged obliquely between the side walls of the lower legs and the bottom surface of the lower mounting platform, an upper leg arranged on the top surface of the lower mounting platform, an upper mounting platform arranged on the top of the upper leg, and an upper diagonal brace arranged obliquely between the side walls of the upper legs and the bottom surface of the upper mounting platform; the mixing main unit is arranged on the top surface of the lower mounting platform and passes through the lower mounting platform; the aggregate temporary storage hopper and the powder scale are arranged on the top surface of the upper mounting platform and pass through the upper mounting platform.

[0017] In summary, the beneficial technical effects of the present invention are as follows: the low-carbon machine-made sand self-compacting concrete production line realizes the automated production of concrete through the aggregate supply device, the powder supply device and the stirring device, which is beneficial to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the top view of the structure of the low-carbon machine-made sand self-compacting concrete production line of the present invention; Figure 2 It is a schematic diagram of the structure of the powder supply device and the stirring device in the present invention; Figure 3 It is a cross-sectional structural diagram of the powder screening machine in the present invention; Figure 4 yes Figure 3 The enlarged view of point A in the middle; Figure 5 yes Figure 3 The enlarged view of point B in the middle; Figure 6 It is a structural schematic diagram of the powder screening machine of the present invention from the first perspective; Figure 7 It is a structural schematic diagram of the powder screening machine of the present invention from a second viewing angle.

[0019] In the above drawings: 1. Aggregate batcher; 2. Flat belt conveyor; 3. Inclined belt conveyor; 4. Powder silo; 5. Screw conveyor; 6. Lower support leg; 7. Lower mounting platform; 8. Lower diagonal support; 9. Upper support leg; 10. Upper mounting platform; 11. Upper diagonal support; 12. Powder scale; 13. Aggregate temporary storage hopper; 14. Mixing main machine; 15. Aggregate pipe; 16. Powder inlet; 17. Powder screening machine; 18, frame; 19, screening chamber; 20, lower frame; 21, connecting plate; 22, lower connecting frame plate; 23, middle frame; 24, upper frame; 25, upper connecting frame plate; 26, active perforation; 27, driven perforation; 28, rotary screen cylinder; 29, active turntable; 30, screen cylinder; 31, driven turntable; 32, rotary screen chamber; 33, screen hole; 34, active connecting plate; 35, driven connecting plate Connecting plate; 36, feeding pipe; 361, feeding channel; 37, mounting plate; 38, material hole; 39, guide rod hole; 40, lower convex cylinder; 41, lower cylinder groove; 42, upper convex cylinder; 43, upper cylinder groove; 44, upper cylinder cover; 45, vertical slide bar; 46, vertical slide block; 47, vertical plug; 48, push rod electric cylinder; 49, battery; 50, return spring; 51, catheter rack; 52, catheter hole ; 53. Guide slide hole; 54. Vertical slide tube; 55. Guide slide block; 56. Rodless electric cylinder; 57. Active vertical plate; 58. Active horizontal plate; 59. Active rib plate; 60. Driving motor; 61. Active shaft; 62. Active frame; 63. Active bearing seat; 64. Driven vertical plate; 65. Driven horizontal plate; 66. Driven rib plate; 67. Driven frame; 68. Driven bearing seat; 69. Driven shaft. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figure 1 As shown, the present invention proposes a low-carbon machine-made sand self-compacting concrete production line, which includes an aggregate supply device, a powder supply device, and a stirring device.

[0022] like Figure 1 As shown, the aggregate supply device includes an aggregate batcher 1, a flat belt conveyor 2, and an inclined belt conveyor 3.

[0023] The aggregate batcher 1 is an existing aggregate weighing and batching equipment, and its main function is to feed the aggregate to the flat belt conveyor 2 continuously and evenly. The aggregate batcher 1 can batch fine aggregate (sand) and coarse aggregate (crushed stone).

[0024] The flat belt conveyor 2 is fixedly installed at the bottom of the aggregate batcher 1 , and the flat belt conveyor is located directly below the discharge port of the aggregate batcher 1 , and the aggregates weighed and batched in the aggregate batcher 1 will fall onto the flat belt conveyor 2 .

[0025] One end of the inclined belt conveyor 3 is connected to the flat belt conveyor 2, and the other end is connected to the mixing device. The flat belt conveyor 2 conveys the aggregate to the inclined belt conveyor 3, and then the inclined belt conveyor 3 conveys the aggregate to the mixing device.

[0026] like Figure 1 As shown, the powder supply device includes a powder bin 4 and a screw conveyor 5.

[0027] The powder bin 4 is an existing powder batching equipment, and its main function is to feed the powder (cement, mineral powder, fly ash) to the screw conveyor 5 continuously and evenly.

[0028] One end of the screw conveyor 5 is connected to the discharge port at the bottom of the powder bin 4 , and the other end is connected to the stirring device. The cement, mineral powder and fly ash in the powder bin 4 are fed into the stirring device through the screw conveyor 5 .

[0029] like Figure 2 As shown, the mixing device includes a building frame, a powder scale 12, an aggregate temporary storage bucket 13, a mixing main machine 14, and a powder screening machine 17.

[0030] like Figure 2 As shown, the building frame includes a lower support leg 6, a lower mounting platform 7, a lower diagonal brace 8, an upper support leg 9, an upper mounting platform 10, and an upper diagonal brace 11.

[0031] The lower legs 6 are fixedly installed on the factory ground. In the present embodiment, there are four lower legs 6, which are distributed in a rectangular shape. A lower mounting platform 7 is fixedly installed on the top of the four lower legs 6. A lower diagonal brace 8 is obliquely arranged between the side wall of the lower leg 6 and the bottom surface of the lower mounting platform 7. The lower diagonal brace 8 is used to enhance the connection strength between the lower legs 6 and the lower mounting platform 7.

[0032] The upper legs 9 are fixedly mounted on the top surface of the lower mounting platform 7. In the present embodiment, there are four upper legs 9, which are respectively fixedly mounted on the four corners of the lower mounting platform 7. An upper mounting platform 10 is fixedly mounted on the top of the four upper legs 9. An upper diagonal brace 11 is obliquely arranged between the side walls of the upper legs 9 and the bottom surface of the upper mounting platform 10. The upper diagonal brace 11 is used to enhance the connection strength between the upper legs 9 and the upper mounting platform 10.

[0033] like Figure 2As shown, the powder scale 12 is fixedly installed on the top surface of the upper mounting platform 10. The powder scale 12 is penetrated on the upper mounting platform 10. The powder scale 12 is a powder weighing device. In this embodiment, the powder scale 12 has three weighing chambers, and the three weighing chambers are respectively used to weigh cement, mineral powder and fly ash. The three weighing chambers of the powder scale 12 are respectively located below the outlets of the three screw conveyors 5. Cement, mineral powder and fly ash are respectively sent into the three weighing chambers of the powder scale 12 through the screw conveyor 5 for quantitative weighing.

[0034] like Figure 2 As shown, the aggregate temporary storage bucket 13 is fixedly installed on the top surface of the upper mounting platform 10. The aggregate temporary storage bucket 13 is penetrated on the upper mounting platform 10. The inlet at the top of the aggregate temporary storage bucket 13 is located below the discharge port of the inclined belt conveyor 3. The aggregate temporary storage bucket 13 is used to temporarily store fine aggregate (sand) and coarse aggregate (crushed stone) conveyed by the inclined belt conveyor 3.

[0035] like Figure 2 As shown, the mixing main unit 14 is fixedly mounted on the top surface of the lower mounting platform 7, the mixing main unit 14 is penetrated through the lower mounting platform 7, an aggregate pipe 15 aligned with the outlet of the aggregate temporary storage bucket 13 is fixedly connected to the top surface of the mixing main unit 14, and a powder inlet 16 is opened on the top surface of the mixing main unit 14.

[0036] like Figure 2 As shown, the powder screening machine 17 is fixedly mounted on the top surface of the mixing main machine 14, and the powder screening machine 17 is located directly above the powder inlet 16. The powder screening machine 17 includes a frame 18 having a screening chamber 19 therein, and the screening chamber 19 is communicated with the powder inlet 16.

[0037] like Figure 3 and 5 As shown, the frame 18 includes a lower frame body 20, a middle frame 23, and an upper frame body 24 which are arranged in sequence from bottom to top.

[0038] The cross section of the lower frame 20 is a square ring. The bottom of the outer wall of the lower frame 20 is fixedly connected to a connecting plate 21 connected to the top surface of the mixing main unit 14 by screws, and the top of the outer wall of the lower frame 20 is fixedly connected to a lower connecting frame plate 22 connected to the bottom surface of the middle frame 23 by screws.

[0039] The cross section of the middle frame 23 is a square ring, and the middle frame 23 is used to connect the lower frame body 20 and the upper frame body 24 .

[0040] The upper frame body 24 is in the shape of a square tube with an opening facing downward, and an upper connecting frame plate 25 is fixedly connected to the bottom of the outer side wall of the upper frame body 24 and is screwed to the top surface of the middle frame 23. An active through hole 26 and a driven through hole 27 are respectively opened on the two opposite outer side walls of the upper frame body 24, and both the active through hole 26 and the driven through hole 27 are rectangular holes, and the active through hole 26 is aligned with the driven through hole 27.

[0041] like Figure 3 As shown, a hollow frustum-shaped rotary screen drum 28 is rotatably arranged in the screening chamber 19, and the rotary screen drum 28 includes an active turntable 29, a screen drum body 30, and a driven turntable 31. The screen drum body 30 is hollow frustum-shaped, and the interior of the screen drum body 30 is a rotary screen cavity 32. The outer wall of the screen drum body 30 is evenly distributed with screen holes 33 for screening powder materials. An active connecting plate 34 bolted to the active turntable 29 is fixedly connected to one end of the screen drum body 30 close to the active turntable 29, and a driven connecting plate 35 bolted to the driven turntable 31 is fixedly connected to one end of the screen drum body 30 close to the driven turntable 31.

[0042] like Figure 3 and 4 As shown, a feed pipe 36 with a feed channel 361 is fixedly connected to the outer wall of the screen cylinder 30, the feed channel 361 is communicated with the rotary screen chamber 32, a mounting plate 37 connected to the feed pipe 36 is arranged in the feed channel 361, a plurality of material passing holes 38 are equidistantly provided on the mounting plate 37 in the circumferential direction, the material passing holes 38 are frustum holes with the small end facing the rotary screen chamber 32, a guide rod hole 39 is provided in the middle of the mounting plate 37, the guide rod hole 39 is located on the inner side of the plurality of material passing holes 38, and the guide rod hole 39 is a circular hole.

[0043] like Figure 4 As shown, a lower convex cylinder 40 is fixedly connected to the end surface of the mounting plate 37 facing the rotary sieve chamber 32 , and a lower cylinder groove 41 is formed on the end surface of the lower convex cylinder 40 facing the rotary sieve chamber 32 . The lower cylinder groove 41 is a circular groove and is connected to the guide rod hole 39 .

[0044] like Figure 4 As shown, an upper convex cylinder 42 is fixedly connected to the end surface of the mounting plate 37 facing away from the rotary screen chamber 32, an upper cylinder groove 43 is provided on the top surface of the upper convex cylinder 42, the upper cylinder groove 43 is a circular groove, the upper cylinder groove 43 is connected to the guide rod hole 39, and an upper cylinder cover 44 is fixedly installed on the top surface of the upper convex cylinder 42 to close the upper cylinder groove 43.

[0045] like Figure 4 As shown, a vertical slide bar 45 is inserted into the guide rod hole 39, and the vertical slide bar 45 is slidably matched with the guide rod hole 39. A vertical slider 46 is coaxially arranged at one end of the vertical slide bar 45 close to the rotary screen chamber 32, and the vertical slider 46 is slidably matched with the lower cylinder groove 41. A vertical plug 47 is fixedly connected to the bottom of the vertical slider 46, and the vertical plug 47 is slidably arranged at the bottom of the feed channel 361. The vertical plug 47 is used to control the connection between the feed channel 361 and the rotary screen chamber 32.

[0046] like Figure 4As shown, a push rod electric cylinder 48 is fixedly installed on the end surface of the upper cylinder cover 44 facing the upper cylinder groove 43, and the piston rod of the push rod electric cylinder 48 is connected to the end surface of the vertical slide bar 45 away from the rotary screen chamber 32. When the piston rod of the push rod electric cylinder 48 is extended, it can push the vertical slide bar 45, the vertical slider 46, and the vertical plug 47 to move toward the rotary screen chamber 32 until the vertical plug 47 slides out of the feed channel 361. At this time, the powder in the feed channel 361 can enter the rotary screen chamber 32. A battery 49 is arranged in the upper cylinder groove 43, and the battery 49 is used to power the push rod electric cylinder 48.

[0047] like Figure 4 As shown, a return spring 50 is sleeved on the vertical slide bar 45, the upper end of the return spring 50 is fixedly connected to the top wall of the lower cylinder groove 41, and the lower end of the return spring 50 is fixedly connected to the end surface of the vertical slider 46 away from the rotary screen chamber 32. When the push rod electric cylinder 48 pushes the vertical slide bar 45, the vertical slider 46, and the vertical plug 47 to move toward the rotary screen chamber 32, the return spring 50 is stretched; when the push rod electric cylinder 48 stops working, the return spring 50 can drive the piston rods of the vertical slide bar 45, the vertical slider 46, the vertical plug 47, and the push rod electric cylinder 48 to return to their original positions. Using the return spring 50 to drive the piston rod of the push rod electric cylinder 48 back to its original position is conducive to saving the working electricity of the push rod electric cylinder 48, thereby extending the replacement cycle of the battery 49.

[0048] like Figure 3 and 5 As shown, a conduit frame 51 having a conduit hole 52 is fixedly connected to the top surface of the upper frame body 24. The conduit hole 52 is a circular hole, and the conduit hole 52 is aligned with the feed channel 361. Guide sliding holes 53 are provided on the two opposite outer side walls of the conduit frame 51, and the two guide sliding holes 53 are connected to the conduit hole 52.

[0049] like Figure 5 As shown, a vertical slide tube 54 with a material guide channel is slidably arranged in the conduit hole 52, and the material guide channel can be aligned with the feed channel 361. A pair of guide sliders 55 are fixedly connected to the outer wall of the vertical slide tube 54 and are respectively slidably matched with the two guide slide holes 53.

[0050] like Figure 5 As shown, a rodless electric cylinder 56 is fixedly mounted on the outer wall of the conduit frame 51, and the piston rod of the rodless electric cylinder 56 is connected to the guide slider 55. When the rodless electric cylinder 56 drives the vertical slide tube 54 downward through the guide slider 55 until the bottom surface of the vertical slide tube 54 abuts against the top surface of the feed tube 36, the guide channel is connected to the feed channel 361.

[0051] like Figure 3 and 6As shown, a pair of active vertical plates 57 are fixedly connected to the side wall of the lower frame 20 near the active through hole 26, and an active horizontal plate 58 is fixedly connected to the end surface of the two active vertical plates 57 away from the lower frame 20, and an active rib plate 59 is arranged between the side wall of each active vertical plate 57 and the bottom surface of the active horizontal plate 58. A driving motor 60 is fixedly installed on the top surface of the active horizontal plate 58, and the output shaft of the driving motor 60 is coaxially connected to the driving shaft 61, and the end of the driving shaft 61 away from the driving motor 60 is coaxially connected to the driving turntable 29.

[0052] like Figure 3 and 6 As shown, an active frame 62 is fixedly connected to the top surface of the active cross plate 58, and an active bearing seat 63 is bolted to the active frame 62. The active bearing seat 63 allows the active shaft 61 to pass through, and the active bearing seat 63 is used to support the active shaft 61 to rotate.

[0053] like Figure 3 and 7 As shown, a pair of driven vertical plates 64 are fixedly connected to the side wall of the lower frame 20 near the driven through hole 27, and a driven horizontal plate 65 is fixedly connected to the end surface of the two driven vertical plates 64 facing away from the lower frame 20, and a driven rib plate 66 is arranged between the side wall of each driven vertical plate 64 and the bottom surface of the driven horizontal plate 65. A driven frame 67 is fixedly connected to the top surface of the driven horizontal plate 65, and a driven bearing seat 68 is bolted to the top surface of the driven frame 67. A driven shaft 69 is passed through the driven bearing seat 68, and the end of the driven shaft 69 away from the driven bearing seat 68 is coaxially connected to the driven rotating disk 31.

[0054] This low-carbon machine-made sand self-compacting concrete production line realizes the automated production of concrete through an aggregate supply device, a powder supply device and a mixing device, which is beneficial to improving production efficiency.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A low-carbon machine-made sand self-compacting concrete production line, characterized by: The invention comprises an aggregate supply device, a powder supply device and a stirring device. The aggregate supply device comprises an aggregate batcher (1), a flat belt conveyor (2) arranged at the bottom of the aggregate batcher (1), and an inclined belt conveyor (3) connected to the flat belt conveyor (2). The powder supply device comprises a powder bin (4), and a screw conveyor (5) connected to the discharge port of the powder bin (4). The stirring device comprises a building frame, an aggregate temporary storage hopper (1) arranged on the building frame and having an inlet located below the outlet of the inclined belt conveyor (3). 3) a powder scale (12) arranged on the building frame and having an inlet located below the outlet of the screw conveyor (5); a main mixing machine (14) arranged on the building frame and located below the powder scale (12); an aggregate pipe (15) aligned with the outlet of the aggregate temporary storage hopper (13) is arranged on the top surface of the main mixing machine (14); a powder inlet (16) is opened on the top surface of the main mixing machine (14); and a powder screening machine (17) located above the powder inlet (16) is arranged on the top surface of the main mixing machine (14).

2. A low-carbon machine-made sand self-compacting concrete production line according to claim 1, characterized in that: The powder screening machine (17) comprises a frame (18) having a screening chamber (19) connected to a powder inlet (16) therein; a rotary screen drum (28) is rotatably arranged in the screening chamber (19); the rotary screen drum (28) comprises a driving turntable (29), a driven turntable (31), and a screen drum body (30) arranged between the driving turntable (29) and the driven turntable (31) and having a rotary screen cavity (32) therein; a feed pipe (36) having a feed channel (361) is arranged on the outer side wall of the screen drum body (30); the feed channel (361) is connected to the rotary screen cavity (32); a conduit frame (51) is arranged on the top surface of the frame (18); a conduit hole (52) aligned with the feed channel (361) is opened on the conduit frame (51).

3. A low-carbon machine-made sand self-compacting concrete production line according to claim 2, characterized in that: A mounting plate (37) connected to the feed pipe (36) is arranged in the feed channel (361), a plurality of material passing holes (38) are provided on the mounting plate (37), a guide rod hole (39) is provided in the middle of the mounting plate (37), a lower convex cylinder (40) is provided on the end surface of the mounting plate (37) facing the rotary screen chamber (32), a lower cylinder groove (41) communicating with the guide rod hole (39) is provided on the end surface of the lower convex cylinder (40) facing the rotary screen chamber (32), an upper convex cylinder (42) is provided on the end surface of the mounting plate (37) away from the rotary screen chamber (32), an upper cylinder groove (43) communicating with the guide rod hole (39) is provided on the top surface of the upper convex cylinder (42), and a lower cylinder groove (41) communicating with the guide rod hole (39) is provided on the top surface of the upper convex cylinder (42). (43) A closed upper cylinder cover (44), a vertical sliding rod (45) slidingly matched with the guide rod hole (39) is passed through the guide rod hole (39), a vertical sliding block (46) slidingly matched with the lower cylinder groove (41) is coaxially arranged at one end of the vertical sliding block (45) close to the rotary screen chamber (32), a vertical plug (47) is arranged at the bottom of the vertical sliding block (46), and the vertical plug (47) is slidably arranged at the bottom of the feed channel (361), a push rod electric cylinder (48) is arranged on the end surface of the upper cylinder cover (44) facing the upper cylinder groove (43), and the piston rod of the push rod electric cylinder (48) is connected to the end surface of the vertical sliding block (45) away from the rotary screen chamber (32), and a battery (49) is arranged in the upper cylinder groove (43).

4. A low-carbon machine-made sand self-compacting concrete production line according to claim 3, characterized in that: A return spring (50) is sleeved on the vertical sliding rod (45), the upper end of the return spring (50) is fixedly connected to the top wall of the lower cylinder groove (41), and the lower end of the return spring (50) is fixedly connected to the end surface of the vertical sliding block (46) facing away from the rotary screen chamber (32).

5. A low-carbon machine-made sand self-compacting concrete production line according to claim 3, characterized in that: A guide slide hole (53) is provided on the outer wall of the catheter frame (51), and the guide slide hole (53) is connected to the catheter hole (52). A vertical slide tube (54) having a material guide channel is slidably arranged in the catheter hole (52), and the material guide channel is aligned with the feed channel (361). A guide slider (55) slidably matched with the guide slide hole (53) is provided on the outer wall of the vertical slide tube (54). A rodless electric cylinder (56) is provided on the outer wall of the catheter frame (51), and the piston rod of the rodless electric cylinder (56) is connected to the guide slider (55).

6. A low-carbon machine-made sand self-compacting concrete production line according to claim 2, characterized in that: The frame (18) comprises a lower frame body (20), a middle frame (23), and an upper frame body (24) which are arranged in sequence from bottom to top; a connecting plate (21) which is screwed to the top surface of the mixing main unit (14) is arranged at the bottom of the outer wall of the lower frame body (20); a lower connecting frame plate (22) which is screwed to the bottom surface of the middle frame (23) is arranged at the top of the outer wall of the lower frame body (20); and an upper connecting frame plate (25) which is screwed to the top surface of the middle frame (23) is arranged at the bottom of the outer wall of the upper frame body (24).

7. A low-carbon machine-made sand self-compacting concrete production line according to claim 6, characterized in that: An active through hole (26) and a driven through hole (27) are respectively provided on two opposite outer side walls of the upper frame body (24); a driving shaft (61) coaxially connected to the active turntable (29) is provided through the active through hole (26); a driving motor (60) is provided at one end of the active shaft (61) away from the active turntable (29); an active bearing seat (63) for supporting the active shaft (61) is provided on the outer side of the frame (18); a driven shaft (69) coaxially connected to the driven turntable (31) is provided through the driven through hole (27); and a driven bearing seat (68) for supporting the driven shaft (69) is provided on the outer side of the frame (18).

8. A low-carbon machine-made sand self-compacting concrete production line according to claim 7, characterized in that: An active vertical plate (57) is arranged on the side wall of the lower frame (20) close to the active through hole (26), an active horizontal plate (58) is arranged on the end surface of the active vertical plate (57) facing away from the lower frame (20), active ribs (59) are arranged between the side wall of the active vertical plate (57) and the bottom surface of the active horizontal plate (58), an active frame (62) is arranged on the top surface of the active horizontal plate (58), and the active bearing seat (63) is arranged on the top surface of the active frame (62).

9. A low-carbon machine-made sand self-compacting concrete production line according to claim 7, characterized in that: A driven vertical plate (64) is arranged on the side wall of the lower frame body (20) close to the driven through hole (27), a driven horizontal plate (65) is arranged on the end surface of the driven vertical plate (64) facing away from the lower frame body (20), a driven rib plate (66) is arranged between the side wall of the driven vertical plate (64) and the bottom surface of the driven horizontal plate (65), a driven frame (67) is arranged on the top surface of the driven horizontal plate (65), and the driven bearing seat (68) is arranged on the top surface of the driven frame (67).

10. The low-carbon machine-made sand self-compacting concrete production line according to claim 1, characterized in that: The building frame comprises a plurality of lower legs (6), a lower mounting platform (7) arranged on the top of the lower legs (6), a lower diagonal brace (8) arranged obliquely between the side wall of the lower legs (6) and the bottom surface of the lower mounting platform (7), an upper leg (9) arranged on the top surface of the lower mounting platform (7), an upper mounting platform (10) arranged on the top of the upper leg (9), and an upper diagonal brace (11) arranged obliquely between the side wall of the upper leg (9) and the bottom surface of the upper mounting platform (10); the mixing main unit (14) is arranged on the top surface of the lower mounting platform (7) and passes through the lower mounting platform (7); the aggregate temporary storage hopper (13) and the powder scale (12) are arranged on the top surface of the upper mounting platform (10) and pass through the upper mounting platform (10).

Images