Anti-permeation and anti-cracking concrete and preparation device thereof

Abstract

The application discloses an anti-seepage and anti-cracking concrete and a preparation device thereof, and relates to the field of concrete, which comprises a machine body, a stirring mechanism installed in the interior of the machine body and used for stirring the concrete raw materials of the machine body, wherein the stirring mechanism comprises a sliding sleeve arranged in the interior along the height direction of the machine body, a plurality of stirring rods installed outside the sliding sleeve and a driving assembly used for driving the sliding sleeve to rotate, an adjusting mechanism, the adjusting mechanism comprising a first connecting block rotationally connected outside the sliding sleeve, a transmission shaft installed in the interior along the height direction of the machine body, a linkage assembly used for driving the first connecting block to move up and down reciprocatingly, and a lifting assembly used for driving the transmission shaft to move along the height direction of the machine body, wherein the linkage assembly is installed on the transmission shaft and connected with the driving assembly, and the anti-seepage and anti-cracking concrete and the preparation device thereof effectively improve the mixing sufficiency of the concrete materials, ensure that the polyvinyl alcohol fibers are uniformly distributed in the concrete, and further improve the preparation quality of the anti-seepage and anti-cracking concrete.

Description

Technical Field

[0001] This invention relates to concrete technology, specifically to a seepage-proof and crack-resistant concrete and its preparation apparatus. Background Technology

[0002] Concrete, or simply concrete, is a general term for engineering composite materials in which aggregates are bound together by cementing materials. The term concrete usually refers to cement concrete, which is made by mixing cement as cementing material, sand and stone as aggregates, and water (which may contain admixtures) in a certain proportion. It is widely used in civil engineering.

[0003] Existing ordinary concrete generally has poor impermeability and crack resistance. However, the material on the inner wall and at the discharge port of the concrete preparation device is prone to insufficient mixing. Insufficient mixing of concrete directly affects its quality. Moreover, the concrete contains large aggregate particles, which can easily lead to material accumulation during discharge. This requires additional discharge equipment to assist in the discharge, which makes the preparation device complex in structure, occupies a large space, and has a high cost, making it difficult to promote and use. Therefore, this solution proposes an impermeable and crack-resistant concrete and its preparation device. Summary of the Invention

[0004] The purpose of this invention is to provide a seepage-proof and crack-resistant concrete and its preparation device to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a seepage-proof and crack-resistant concrete, comprising the following raw materials:

[0006] Fly ash 60-80kg; medium sand 700-720kg; cement 340-360kg; water 165-175kg; gravel 1050-1080kg; admixtures 10-11kg; polyvinyl alcohol fiber 1-1.5kg.

[0007] Further, the parameters of the fly ash are: density 2.68 g / cm3, loss on ignition 3.7%, water requirement ratio 81.5%, sieve residue on a 45μm square hole sieve: 8.7%, and moisture content 0.3%; the parameters of the medium sand are: fineness modulus 2.6 and mud content 2.4%; the gravel is selected as crushed stone with a size of 6-30.5 mm; the admixture is polycarboxylate superplasticizer with a solid mass fraction of 27%; and the length range of the polyvinyl alcohol fiber is 6-12 mm.

[0008] A device for preparing impermeable and crack-resistant concrete includes: a machine body, wherein a discharge trough is provided at the bottom of the machine body;

[0009] A mixing mechanism is installed inside the machine body for mixing the concrete raw materials of the machine body. The mixing mechanism includes a sliding sleeve arranged inside it along the height direction of the machine body, a plurality of mixing rods installed outside the sliding sleeve, and a drive assembly for driving the sliding sleeve to rotate. A sealing block is installed at the bottom end of the sliding sleeve. The sealing block is located inside the discharge chute and abuts against the discharge chute.

[0010] The adjustment mechanism includes a first connecting block rotatably connected to the outside of the sliding sleeve, a drive shaft installed inside along the height direction of the machine body, a linkage component for driving the first connecting block to move up and down reciprocally, and a lifting component for driving the drive shaft to move along the height direction of the machine body. The linkage component is installed on the drive shaft and is connected to the drive component.

[0011] The feeding mechanism includes a mixing feeding cylinder installed on the outer wall of one side of the machine body, an independent feeding cylinder installed on the top of the machine body, a square tube installed at the bottom of the independent feeding cylinder, a guide plate slidably connected inside the square tube, and a transmission component for driving the guide plate to reciprocate radially along the machine body. The transmission component is connected to the first connecting block.

[0012] Furthermore, the drive assembly includes a motor mounted on the top of the machine body, a drive shaft mounted on the output end of the motor, and a first gear fixedly sleeved on the outside of the drive shaft. The drive shaft is rotatably connected inside the machine body along the height direction, and the sliding sleeve is slidably sleeved on the outside of the drive shaft along the axial direction of the drive shaft.

[0013] Furthermore, the linkage assembly includes a reciprocating screw fixed to the bottom end of the drive shaft and a second gear fixedly sleeved on the outside of the drive shaft. The first connecting block is also screwed to the outside of the reciprocating screw. Limiting blocks are sleeved on both ends of the reciprocating screw. The second gear meshes with the first gear, and the thickness of the second gear is less than the thickness of the first gear.

[0014] Furthermore, the top end of the drive shaft extends to the outside of the machine body, and the lifting assembly includes a bracket fixed to the top of the machine body, a hydraulic cylinder mounted on the top of the bracket, a second connecting block fixed to the extended end of the hydraulic cylinder, and a guide rod fixed between the bracket and the machine body. The second connecting block is slidably sleeved on the guide rod and rotatably connected to the outside of the drive shaft.

[0015] Furthermore, a protective roller is rotatably connected to the outside of the stirring rod, and the protective roller is composed of two wear-resistant blocks with a frustum-shaped structure.

[0016] Furthermore, a scraper is fixedly connected to the end of the stirring rod away from the sliding sleeve, and the outer wall of the scraper abuts against the inner wall of the machine body.

[0017] Furthermore, the guide plate is disposed through a square tube, and a guide groove is provided through the interior of the guide plate. The transmission component includes a connecting rod hinged to the outer wall of the first connecting block, and the other end of the connecting rod is hinged to the outer wall of the guide plate.

[0018] Compared with the prior art, the present invention provides a seepage-proof and crack-resistant concrete and its preparation device. The appropriate addition of polyvinyl alcohol fiber can effectively inhibit the generation and development of plastic cracks. Polyvinyl alcohol fiber can improve the seepage resistance of concrete and reduce the seepage height of concrete.

[0019] Through the cooperation of various components of the mixing and adjusting mechanisms, the drive shaft, sliding sleeve, and mixing rod are driven to rotate. During the rotation of the mixing rod, the scraper rotates along the inner wall of the machine body, thereby scraping off materials that are easy to adhere to the inner wall of the machine body and are inconvenient to mix. During the rotation of the drive shaft, the transmission shaft is driven to rotate synchronously through the meshing of the first gear and the second gear, which in turn drives the reciprocating screw to rotate synchronously. This causes the first connecting block to move up and down within the range of the reciprocating screw, and the sliding sleeve moves up and down synchronously. The sealing block moves up and down along the inner wall of the discharge chute, thereby preventing the problem of uneven mixing of materials inside the discharge chute and effectively improving the fullness of mixing of various materials in concrete.

[0020] By coordinating the adjustment mechanism and the feeding mechanism, when the first connecting block is driven to move up and down, the guide plate is driven to move left and right through the connecting rod. When the guide trough moves out of the square tube, the polyvinyl alcohol fiber inside it falls naturally, and then the polyvinyl alcohol fiber inside the square tube is fed into the mixture in a cycle, so that the polyvinyl alcohol fiber can be fed in segments, thereby ensuring that the polyvinyl alcohol fiber is evenly distributed in the concrete.

[0021] When the concrete mixing is complete and needs to be discharged, the hydraulic cylinder is first controlled to move the second connecting block upward along the outside of the guide rod, which in turn drives the drive shaft to move upward synchronously. This, in turn, drives the first connecting block upward through the reciprocating screw. The sliding sleeve then moves upward along the outer wall of the drive shaft, and the sealing block moves upward to the top of the discharge chute. Then, the motor is started to drive the sliding sleeve and the sealing block to move up and down reciprocally after they have risen to their current positions. The sealing block drives the material at the discharge chute opening downward, thus preventing the material from accumulating at the discharge chute and causing blockage during discharge. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the machine body provided in an embodiment of the present invention;

[0025] Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 4 This is a schematic cross-sectional view of the overall structure provided in an embodiment of the present invention;

[0027] Figure 5 This is a partial cross-sectional view of the feeding mechanism provided in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Machine body; 2. Sliding sleeve; 3. Stirring rod; 4. Discharge trough; 5. Sealing block; 6. First connecting block; 7. Mixing feeding cylinder; 8. Independent feeding cylinder; 9. Square tube; 10. Guide plate; 11. Motor; 12. Drive shaft; 13. First gear; 14. Transmission shaft; 15. Reciprocating screw; 16. Second gear; 17. Support; 18. Hydraulic cylinder; 19. Second connecting block; 20. Guide rod; 21. Protective roller; 22. Scraper; 23. Guide trough; 24. Connecting rod. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Example 1:

[0032] A type of impermeable and crack-resistant concrete, comprising the following raw materials:

[0033] The ingredients are: 60-80 kg fly ash; 700-720 kg medium sand; 340-360 kg cement; 165-175 kg water; 1050-1080 kg aggregate; 10-11 kg admixture; 1-1.5 kg polyvinyl alcohol fiber. The fly ash parameters are: density 2.68 g / cm³, loss on ignition 3.7%, water requirement ratio 81.5%, sieve residue on a 45μm square-hole sieve: 8.7%, moisture content 0.3%. The medium sand parameters are: fineness modulus 2.6, mud content 2.4%. The aggregate is 6-30.5 mm crushed stone. The admixture is polycarboxylate superplasticizer with a solid mass fraction of 27%. The polyvinyl alcohol fiber length range is 6-12 mm. Polyvinyl alcohol fiber can effectively inhibit the generation and development of plastic cracks, improve the impermeability of concrete, and reduce the permeability height of concrete.

[0034] Example 2:

[0035] Please see Figure 1-5 A device for preparing anti-seepage and crack-resistant concrete includes: a machine body 1, with a discharge trough 4 at the bottom of the machine body 1; a mixing mechanism installed inside the machine body 1 for mixing concrete raw materials in the machine body 1, the mixing mechanism including a sliding sleeve 2 arranged inside the machine body 1 along the height direction, multiple mixing rods 3 installed outside the sliding sleeve 2, and a drive assembly for driving the sliding sleeve 2 to rotate, a sealing block 5 installed at the bottom end of the sliding sleeve 2, the sealing block 5 being located inside the discharge trough 4 and abutting against the discharge trough 4, the drive assembly including a motor 11 installed at the top of the machine body 1, a drive shaft 12 installed at the output end of the motor 11, and a first gear 13 fixedly sleeved outside the drive shaft 12, the drive shaft 12 being rotatably connected inside the machine body 1 along the height direction, the sliding sleeve 2 being slidably sleeved outside the drive shaft 12 along the axial direction, by starting the motor 11 to drive the drive shaft 12 to rotate, the sliding sleeve 2 rotates accordingly, thereby driving the multiple mixing rods 3 outside the sliding sleeve 2 to rotate synchronously to mix the materials inside the machine body 1;

[0036] The adjustment mechanism includes a first connecting block 6 rotatably connected to the outside of the sliding sleeve 2, a drive shaft 14 installed inside along the height direction of the body 1, a linkage assembly for driving the first connecting block 6 to reciprocate up and down, and a lifting assembly for driving the drive shaft 14 to move along the height direction of the body 1. The linkage assembly is installed on the drive shaft 14. A through hole is provided at the top of the body 1, and the drive shaft 14 is located inside the through hole. The linkage assembly is connected to the drive assembly. The linkage assembly includes a reciprocating screw 15 fixed to the bottom end of the drive shaft 14 and a second gear 16 fixedly sleeved on the outside of the drive shaft 14. The first connecting block 6 is also screwed to the reciprocating screw. Externally, limit blocks are sleeved at both ends of the reciprocating screw 15. The second gear 16 meshes with the first gear 13, and the thickness of the second gear 16 is less than the thickness of the first gear 13. During the rotation of the drive shaft 12, the drive shaft 14 is driven to rotate synchronously through the meshing of the first gear 13 and the second gear 16, which in turn drives the reciprocating screw 15 to rotate synchronously. This causes the first connecting block 6 to move up and down within the range of the reciprocating screw 15. The sliding sleeve 2 moves up and down synchronously, and the sealing block 5 moves up and down along the inner wall of the discharge trough 4, thereby preventing uneven mixing of materials inside the discharge trough 4.

[0037] The top end of the drive shaft 14 extends to the outside of the machine body 1. The lifting assembly includes a bracket 17 fixed to the top of the machine body 1, a hydraulic cylinder 18 installed on the top of the bracket 17, a second connecting block 19 fixed to the extended end of the hydraulic cylinder 18, and a guide rod 20 fixed between the bracket 17 and the machine body 1. The second connecting block 19 is slidably sleeved on the guide rod 20 and rotatably connected to the outside of the drive shaft 14. When the concrete mixing is completed and needs to be discharged, the hydraulic cylinder 18 is controlled to drive the second connecting block 19 to move upward along the outside of the guide rod 20, thereby driving the drive shaft 14 to move upward synchronously. This causes the first connecting block 6 to move upward through the reciprocating screw 15, and the sliding sleeve 2 moves upward along the outer wall of the drive shaft 12. The sealing block 5 moves upward to the top of the discharge chute 4. Subsequently, the sliding sleeve 2 and the sealing block 5 move up and down reciprocally after the position is raised, which can prevent the material from accumulating at the discharge chute 4 and causing discharge blockage when the material is discharged through the discharge chute 4.

[0038] The feeding mechanism includes a mixing feeding cylinder 7 installed on the outer wall of one side of the machine body 1, an independent feeding cylinder 8 installed on the top of the machine body 1, a square tube 9 installed at the bottom of the independent feeding cylinder 8, a guide plate 10 slidably connected inside the square tube 9, and a transmission component for driving the guide plate 10 to reciprocate radially along the machine body 1. The transmission component is connected to the first connecting block 6. The guide plate 10 is installed through the square tube 9, and a guide groove 23 is opened through the interior of the guide plate 10. The transmission component includes a connecting rod 24 hinged to the outer wall of the first connecting block 6, and the other end of the connecting rod 24 is hinged to the outer wall of the guide plate 10. The operator first feeds fly ash through the mixing feeding cylinder 7. Medium sand, cement, water, gravel, and admixtures are added into the machine body 1 according to the required weight. Then, a certain amount of polyvinyl alcohol fiber is added into the independent feeding cylinder 8. The polyvinyl alcohol fiber that enters the independent feeding cylinder 8 falls into the square tube 9. Some of it will enter the guide trough 23. When the first connecting block 6 is driven to move up and down, the guide plate 10 is driven to move left and right through the connecting rod 24. When the guide trough 23 moves out of the square tube 9, the polyvinyl alcohol fiber inside it falls naturally. This process circulates the polyvinyl alcohol fiber inside the square tube 9 into the mixture, thus ensuring that the polyvinyl alcohol fiber is evenly distributed in the concrete.

[0039] The mixing rod 3 is externally connected to a protective roller 21. The protective roller 21 is composed of two wear-resistant blocks with a frustum structure. The rotating setting and frustum structure design of the protective roller 21 reduce the impact force between the mixing rod 3 and the stones inside the machine body 1 during rotation, thereby protecting the mixing rod 3. The rotating connection of the protective roller 21 can also enhance the concrete mixing effect inside the machine body 1.

[0040] A scraper 22 is fixedly connected to the end of the stirring rod 3 away from the sliding sleeve 2. The outer wall of the scraper 22 abuts against the inner wall of the machine body 1. During the rotation of the stirring rod 3, the scraper 22 is driven to rotate along the inner wall of the machine body 1, thereby scraping off materials that are easy to adhere to the inner wall of the machine body 1 and are inconvenient to stir and mix.

[0041] Working Principle: During operation, the operator first feeds fly ash, medium sand, cement, water, gravel, and additives into the machine body 1 according to the required weight using the mixing feed cylinder 7. Then, a measured amount of polyvinyl alcohol fiber is fed into the independent feed cylinder 8. The polyvinyl alcohol fiber entering the independent feed cylinder 8 falls into the square tube 9, with a portion entering the guide trough 23. The starting motor 11 drives the drive shaft 12 to rotate, causing the sliding sleeve 2 to rotate accordingly. This, in turn, drives multiple stirring rods 3 outside the sliding sleeve 2 to rotate synchronously, stirring the materials inside the machine body 1. During rotation, the stirring rods 3 drive the scraper 22 to rotate along the inner wall of the machine body 1, thus scraping away materials that easily adhere to the inner wall of the machine body 1 and are difficult to mix. During the rotation of the drive shaft 12… The meshing of the first gear 13 and the second gear 16 drives the transmission shaft 14 to rotate synchronously, which in turn drives the reciprocating screw 15 to rotate synchronously. This causes the first connecting block 6 to move up and down within the range of the reciprocating screw 15, and the sliding sleeve 2 moves up and down synchronously. The sealing block 5 moves up and down along the inner wall of the discharge trough 4, thus preventing uneven mixing of materials inside the discharge trough 4. In addition, when the first connecting block 6 is driven to move up and down, the connecting rod 24 drives the guide plate 10 to move left and right. When the guide trough 23 moves out of the square tube 9, the polyvinyl alcohol fiber inside it falls naturally, thus circulating and feeding the polyvinyl alcohol fiber inside the square tube 9 into the mixture, thereby ensuring that the polyvinyl alcohol fiber is evenly distributed in the concrete.

[0042] When the concrete mixing is complete and needs to be discharged, the hydraulic cylinder 18 is first used to drive the second connecting block 19 to move upward along the outside of the guide rod 20, which in turn drives the transmission shaft 14 to move upward synchronously. This causes the reciprocating screw 15 to drive the first connecting block 6 to move upward, and the sliding sleeve 2 to move upward along the outer wall of the drive shaft 12. The sealing block 5 then moves upward to the top of the discharge chute 4. Then, the motor 11 is started to drive the sliding sleeve 2 and the sealing block 5 to move up and down reciprocally after they have risen to their current positions. The sealing block 5 drives the material at the opening of the discharge chute 4 downward, which can prevent the material from accumulating at the discharge chute 4 and causing discharge blockage when the material is discharged through the discharge chute 4.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for preparing impermeable and crack-resistant concrete, characterized in that, include: The machine body (1) has a discharge trough (4) at the bottom. A mixing mechanism is installed inside the machine body (1) for mixing concrete raw materials in the machine body (1). The mixing mechanism includes a sliding sleeve (2) arranged inside the machine body (1) along the height direction, a plurality of mixing rods (3) installed outside the sliding sleeve (2), and a drive assembly for driving the sliding sleeve (2) to rotate. A sealing block (5) is installed at the bottom end of the sliding sleeve (2). The sealing block (5) is located inside the discharge trough (4) and abuts against the discharge trough (4). The adjustment mechanism includes a first connecting block (6) rotatably connected to the outside of the sliding sleeve (2), a transmission shaft (14) installed inside along the height direction of the machine body (1), a linkage component for driving the first connecting block (6) to move up and down reciprocally, and a lifting component for driving the transmission shaft (14) to move along the height direction of the machine body (1). The linkage component is installed on the transmission shaft (14) and is connected to the driving component. The feeding mechanism includes a mixing feeding cylinder (7) installed on the outer wall of one side of the machine body (1), an independent feeding cylinder (8) installed on the top of the machine body (1), a square tube (9) installed at the bottom of the independent feeding cylinder (8), a guide plate (10) slidably connected inside the square tube (9), and a transmission component for driving the guide plate (10) to reciprocate radially along the machine body (1). The transmission component is connected to the first connecting block (6).

2. The apparatus for preparing impermeable and crack-resistant concrete according to claim 1, characterized in that, The drive assembly includes a motor (11) mounted on the top of the body (1), a drive shaft (12) mounted on the output end of the motor (11), and a first gear (13) fixedly sleeved on the outside of the drive shaft (12). The drive shaft (12) is rotatably connected inside the body (1) along the height direction, and the sliding sleeve (2) is slidably sleeved on the outside of the drive shaft (12) along the axial direction.

3. The apparatus for preparing impermeable and crack-resistant concrete according to claim 2, characterized in that, The linkage assembly includes a reciprocating screw (15) fixed to the bottom end of the drive shaft (14) and a second gear (16) fixedly sleeved on the outside of the drive shaft (14). The first connecting block (6) is also screwed to the outside of the reciprocating screw (15). Limiting blocks are sleeved on both ends of the reciprocating screw (15). The second gear (16) meshes with the first gear (13), and the thickness of the second gear (16) is less than the thickness of the first gear (13).

4. The apparatus for preparing impermeable and crack-resistant concrete according to claim 3, characterized in that, The top end of the drive shaft (14) extends to the outside of the body (1). The lifting assembly includes a bracket (17) fixed to the top of the body (1), a hydraulic cylinder (18) mounted on the top of the bracket (17), a second connecting block (19) fixed to the extended end of the hydraulic cylinder (18), and a guide rod (20) fixed between the bracket (17) and the body (1). The second connecting block (19) is slidably sleeved on the guide rod (20) and rotatably connected to the outside of the drive shaft (14).

5. The apparatus for preparing impermeable and crack-resistant concrete according to claim 1, characterized in that, The stirring rod (3) is externally rotatably connected to a protective roller (21), which is composed of two wear-resistant blocks with a frustum-shaped structure.

6. The apparatus for preparing impermeable and crack-resistant concrete according to claim 5, characterized in that, The stirring rod (3) is fixedly connected to a scraper (22) at one end away from the sliding sleeve (2), and the outer wall of the scraper (22) abuts against the inner wall of the machine body (1).

7. The apparatus for preparing impermeable and crack-resistant concrete according to claim 1, characterized in that, The guide plate (10) is installed through the square tube (9), and a guide groove (23) is provided inside the guide plate (10). The transmission component includes a connecting rod (24) hinged to the outer wall of the first connecting block (6), and the other end of the connecting rod (24) is hinged to the outer wall of the guide plate (10).

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