Intelligent preparation device and preparation process of recycled aggregate concrete

Abstract

The application provides a recycled aggregate concrete intelligent preparation device and a recycled aggregate concrete preparation process, and belongs to the technical field of concrete aggregate preparation, and comprises a first feeding mechanism, a second feeding mechanism, a stirring tank and a stirring mechanism.The recycled aggregate concrete intelligent preparation device can push the recycled aggregate to the two sides through the first stirring shaft when the recycled aggregate is fed into the stirring cavity, so that the recycled aggregate can be quickly dispersed and accumulation is avoided; the anti-cracking fiber can be pushed downward and pressed into the concrete through the push rod when the anti-cracking fiber is added, so that the uniformity of mixing is effectively improved, the crack resistance of the concrete is improved, and the defects of the traditional structure are solved.

Description

Technical Field

[0001] This invention belongs to the field of concrete aggregate preparation technology, specifically relating to an intelligent preparation device and process for recycled aggregate concrete. Background Technology

[0002] Aggregates made from waste concrete are called recycled concrete aggregates (recycled aggregates for short). Recycled aggregates prepared simply through crushing and screening processes have many angular particles, rough surfaces, and contain hardened cement mortar. Furthermore, the accumulated damage during the crushing process creates numerous microcracks within the concrete blocks, resulting in high porosity, high water absorption, low bulk density, high void ratio, and high crushing index. Recycled concrete made from this type of aggregate has a high water content, low hardened strength, and low modulus of elasticity. Moreover, its durability properties, such as impermeability, frost resistance, carbonation resistance, shrinkage, creep, and chloride ion penetration resistance, are all lower than ordinary concrete. Due to the significant variations in the quality of waste concrete, the performance of recycled aggregates prepared through simple processes also varies considerably, hindering the widespread application of recycled aggregates. Although existing technologies sometimes add other components to improve crack resistance, the mixing effect is often unsatisfactory, leading to insufficient crack resistance. Therefore, it is necessary to develop preparation equipment and processes that can improve the performance of recycled concrete. Summary of the Invention

[0003] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, in a first aspect, the present invention provides an intelligent preparation device for recycled aggregate concrete, which can ensure mixing effect and thus improve crack resistance.

[0004] Secondly, the present invention provides a process for preparing recycled aggregate concrete applied to the above-mentioned intelligent recycled aggregate concrete preparation device.

[0005] According to a first aspect of the present invention, a smart apparatus for preparing recycled aggregate concrete includes: A first feeding mechanism, which stores recycled aggregate; A second feeding mechanism, which stores crack-resistant fibers; A mixing tank, wherein the mixing tank is provided with a mixing chamber, and a first feeding channel and a second feeding channel are respectively provided between the mixing chamber and the first feeding mechanism and the second feeding mechanism; The stirring mechanism includes a first stirring shaft and a second stirring shaft disposed in the stirring chamber. The first stirring shaft is located below the port of the first feeding channel, and the second stirring shaft is located below the port of the second feeding channel. The first stirring shaft is provided with a first spiral blade and a second spiral blade with opposite rotation directions. The second stirring shaft is provided with a plurality of levers circumferentially, and the front end of the levers relative to the rotation direction is set as a tip.

[0006] The intelligent preparation device for recycled aggregate concrete according to embodiments of the present invention has at least the following beneficial effects: In this embodiment, the intelligent preparation device for recycled aggregate concrete can quickly disperse recycled aggregate by pushing it apart on both sides of the first mixing axis when it is fed into the mixing chamber, thus avoiding accumulation. When the crack-resistant fiber is added, it can be pushed down by the lever and pressed into the concrete, thereby effectively improving the uniformity of mixing and thus improving the crack resistance of the concrete, solving the shortcomings of traditional structures.

[0007] According to some embodiments of the present invention, the linear velocity of the side of the first stirring shaft and the second stirring shaft that are close to each other is downward.

[0008] According to some embodiments of the present invention, the upper end of the mixing tank is provided with a feeding port and the bottom is provided with a discharge port, and the discharge port is provided with a valve.

[0009] According to some embodiments of the present invention, the intelligent preparation device for recycled aggregate concrete further includes a fine sand compensation mechanism, which stores fine sand, and a third feeding channel is provided between the mixing chamber and the fine sand compensation mechanism.

[0010] According to some embodiments of the present invention, during the rotation of the first stirring shaft, the forces of the first spiral blade and the second spiral blade are opposite.

[0011] According to some embodiments of the present invention, multiple sets of levers are arranged along the axial direction of the second stirring shaft, each set including multiple levers distributed circumferentially.

[0012] According to some embodiments of the present invention, the distance from the center of the second stirring shaft to different levers is different.

[0013] According to some embodiments of the present invention, the first feeding mechanism is provided with an aggregate cavity, and a screen is provided inside the aggregate cavity, and the first feeding channel is connected to the space above the screen.

[0014] According to some embodiments of the present invention, the screen is inclined, and a discharge port is provided at the lower end of its inclined direction, and the first feeding channel is connected to the discharge port.

[0015] According to a second aspect of the present invention, a recycled aggregate concrete preparation process, applied to the above-mentioned intelligent recycled aggregate concrete preparation device, includes: First, add recycled aggregate, then cement and water, and then mix. During the mixing process, add crack-resistant fibers and fine sand.

[0016] The recycled aggregate concrete preparation process according to embodiments of the present invention has at least the following beneficial effects: This embodiment uses the above-mentioned device to prepare concrete, which can improve the uniformity of crack-resistant fibers and thus improve the crack resistance and strengthening effect of concrete.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of an overall structure of this application; Figure 2 A schematic diagram of a first stirring shaft and a second stirring shaft; Figure 3 This is a schematic diagram of one structure of the second stirring shaft. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Reference Figures 1 to 3 The present invention provides an intelligent preparation device for recycled aggregate concrete, comprising: First feeding mechanism 200, which stores recycled aggregate; The second feeding mechanism 300 stores crack-resistant fibers; The mixing tank 100 is provided with a mixing chamber, and a first feeding channel and a second feeding channel are respectively provided between the mixing chamber and the first feeding mechanism 200 and the second feeding mechanism 300. The stirring mechanism includes a first stirring shaft 400 and a second stirring shaft 500 disposed in the stirring chamber. The first stirring shaft 400 is located below the port of the first feeding channel, and the second stirring shaft 500 is located below the port of the second feeding channel. The first stirring shaft 400 is provided with a first spiral blade 401 and a second spiral blade 402 with opposite rotation directions. The second stirring shaft 500 is circumferentially provided with a plurality of levers 501, and the front end of the levers 501 relative to the rotation direction is set as a tip.

[0025] During operation, recycled aggregate is added to the mixing chamber through the first feeding mechanism 200, and crack-resistant fiber is added to the mixing chamber through the second feeding mechanism 300, while other components can be directly added to the mixing chamber.

[0026] In this embodiment of the intelligent preparation device for recycled aggregate concrete, when the recycled aggregate is fed into the mixing chamber, it is pushed to both sides by the first mixing shaft 400 to achieve rapid dispersion and avoid accumulation. When the crack-resistant fiber is added, it can be pushed downward by the lever 501 and pressed into the concrete, thereby effectively improving the uniformity of mixing and thus improving the crack resistance of the concrete, solving the shortcomings of traditional structures.

[0027] In some embodiments of the present invention, the linear velocity of the side of the first mixing shaft 400 and the second mixing shaft 500 that are close to each other is downward. This allows the lever 501 to quickly press the crack-resistant fibers into the concrete when they are added, and, combined with the action of the first mixing shaft 400, disperses the crack-resistant fibers. The downward linear velocity of the side of the two mixing shafts that are close to each other improves the mixing efficiency of the recycled aggregate and the crack-resistant fibers.

[0028] In some embodiments of the present invention, the mixing tank 100 is further provided with a feeding port at the upper end and a discharge port at the bottom, and the discharge port is equipped with a valve. Other components of concrete can be added to the mixing chamber through the feeding port, and the mixed concrete can be completely discharged from the discharge port. The valve can adopt a known structure in the prior art, and is not specifically limited here.

[0029] In some embodiments of the present invention, the intelligent preparation device for recycled aggregate concrete further includes a fine sand compensation mechanism, which stores fine sand, and a third feeding channel is provided between the mixing chamber and the fine sand compensation mechanism.

[0030] This embodiment adds fine sand to the concrete by setting a fine sand compensation mechanism, which can effectively improve the structural strength of the concrete and make up for the defects in bonding strength and other aspects caused by the large particle size of recycled aggregate.

[0031] The fine sand compensation mechanism in this embodiment is mainly used for compensation, such as when it is found that fine sand needs to be replenished during concrete mixing, to compensate for the lack of fine sand. Of course, when the reserves are sufficient, it can also be used to supply fine sand for concrete mixing, that is, all the fine sand in the concrete is supplied by the fine sand compensation mechanism.

[0032] In some embodiments of the present invention, during the rotation of the first stirring shaft 400, the forces of the first helical blade 401 and the second helical blade 402 are opposite.

[0033] By designing the first helical blade 401 and the second helical blade 402 in opposite directions, the recycled aggregate is pushed to both sides by the helical blades when it falls in, thus avoiding the recycled aggregate from squeezing each other and causing uneven mixing. At the same time, it also facilitates the second stirring shaft 500 to press the crack-resistant fiber into the recycled aggregate, which helps to improve the mixing uniformity and mixing efficiency.

[0034] Furthermore, by timely pushing the recycled aggregate to both sides, the accumulation of recycled aggregate can be avoided, thereby preventing interference between the second mixing shaft 500 and the recycled aggregate, which helps to ensure concrete quality and extend equipment life.

[0035] In some embodiments of the present invention, multiple sets of levers 501 are arranged along the axial direction of the second stirring shaft 500, each set including multiple levers 501 distributed circumferentially.

[0036] It is understandable that, since the first mixing shaft 400 pushes the recycled aggregate to both sides and disperses it, this embodiment provides multiple sets of levers 501 along the axial direction of the second mixing shaft 500, which can help press the crack-resistant fiber into the recycled aggregate and concrete to improve the uniformity of mixing.

[0037] During the mixing process, the concrete is in a fluid state, so the lever 501 does not only contact the concrete at its end. Therefore, in some embodiments of the present invention, the axial distance from different levers 501 to the second mixing shaft 500 is different.

[0038] It is understood that this embodiment sets levers 501 of different lengths so that the second mixing shaft 500 can mix concrete near the shaft as well as concrete at a distance during rotation, thereby improving the mixing effect and ensuring that recycled aggregate and crack-resistant fibers are mixed evenly, thus ensuring the crack resistance of the concrete.

[0039] In some embodiments of the present invention, the first feeding mechanism 200 is provided with an aggregate cavity, a screen is provided inside the aggregate cavity, and a first feeding channel is connected to the space above the screen.

[0040] Since recycled aggregate is made from crushed concrete, some debris inevitably detaches during transportation. This debris can affect the accuracy of adding fine sand during concrete mixing and also hinders the maintenance of concrete strength. This embodiment uses a screen to filter out the debris, thus avoiding the aforementioned defects.

[0041] In some embodiments of the present invention, the screen is inclined, and a discharge port is provided at the lower end of its inclined direction, with a first feeding channel connected to the discharge port. By inclining the screen, the recycled aggregate can be quickly discharged to the discharge port and then into the first feeding channel.

[0042] It is understandable that the first, second, and third feeding channels are all openable and closable, and the conveying method can be designed accordingly based on the characteristics of the conveyed object, such as using screw conveyor or gravity conveyor, etc., without specific limitations here.

[0043] The present invention also proposes a recycled aggregate concrete preparation process, which is applied to the above-mentioned intelligent recycled aggregate concrete preparation device, comprising: first adding recycled aggregate, then adding cement and water, then stirring, and adding crack-resistant fibers and fine sand during the stirring process.

[0044] This embodiment uses the above-mentioned device to prepare concrete, which can improve the uniformity of crack-resistant fibers and thus improve the crack resistance and strengthening effect of concrete.

[0045] In the above process, adding recycled aggregate first, followed by cement and water, can effectively prevent cement dust. Adding crack-resistant fibers when the mixture reaches a fluid state can improve mixing efficiency.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A smart device for preparing recycled aggregate concrete, characterized in that, include: A first feeding mechanism, which stores recycled aggregate; A second feeding mechanism, which stores crack-resistant fibers; A mixing tank, wherein the mixing tank is provided with a mixing chamber, and a first feeding channel and a second feeding channel are respectively provided between the mixing chamber and the first feeding mechanism and the second feeding mechanism; The stirring mechanism includes a first stirring shaft and a second stirring shaft disposed in the stirring chamber. The first stirring shaft is located below the port of the first feeding channel, and the second stirring shaft is located below the port of the second feeding channel. The first stirring shaft is provided with a first spiral blade and a second spiral blade with opposite rotation directions. The second stirring shaft is provided with a plurality of levers circumferentially, and the front end of the levers relative to the rotation direction is set as a tip.

2. The intelligent preparation device for recycled aggregate concrete according to claim 1, characterized in that, The linear velocity of the side of the first stirring shaft and the second stirring shaft that is close to each other is downward.

3. The intelligent preparation device for recycled aggregate concrete according to claim 1, characterized in that, The mixing tank is also provided with a feeding port at the top and a discharge port at the bottom, and the discharge port is equipped with a valve.

4. The intelligent preparation device for recycled aggregate concrete according to claim 1, characterized in that, The intelligent preparation device for recycled aggregate concrete also includes a fine sand compensation mechanism, which stores fine sand, and a third feeding channel is provided between the mixing chamber and the fine sand compensation mechanism.

5. The intelligent preparation device for recycled aggregate concrete according to claim 1, characterized in that, During the rotation of the first stirring shaft, the forces acting on the first spiral blade and the second spiral blade are opposite.

6. The intelligent preparation device for recycled aggregate concrete according to claim 1, characterized in that, The levers are arranged in multiple sets along the axial direction of the second stirring shaft, and each set includes multiple levers distributed circumferentially.

7. The intelligent preparation device for recycled aggregate concrete according to claim 6, characterized in that, The distance from the center of the second stirring shaft varies depending on the different levers.

8. The intelligent preparation device for recycled aggregate concrete according to claim 1, characterized in that, The first feeding mechanism is provided with an aggregate cavity, and a screen is provided inside the aggregate cavity. The first feeding channel is connected to the space above the screen.

9. The intelligent preparation device for recycled aggregate concrete according to claim 8, characterized in that, The screen is inclined, and a discharge port is provided at the lower end of its inclined direction. The first feeding channel is connected to the discharge port.

10. A process for preparing recycled aggregate concrete, characterized in that, The intelligent apparatus for preparing recycled aggregate concrete according to any one of claims 1 to 9 comprises: First, add recycled aggregate, then cement and water, and then mix. During the mixing process, add crack-resistant fibers and fine sand.

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