A rubber particle mixed soil preparation device and a method for modular subgrade construction

Abstract

The present invention provides a device for preparing rubber particle mixed soil and a method for modular subgrade construction, which includes a feed bin and a mixing tank. A through hole is provided at the bottom of the feed bin. The feed bin includes a first feed bin and a second feed bin. A rotating shaft is installed in the mixing tank, and a feed cavity is installed on the rotating shaft. The feed cavity includes a first feed cavity and a second feed cavity. Stirring heads communicated with them are respectively installed at the ends of the first feed cavity and the second feed cavity. Drop holes are provided on the stirring heads. The size of the stirring head is proportional to the distance from its axis of the stirring shaft. It also includes a feed pipe. One end of the feed pipe is respectively connected to the through holes at the bottoms of the first feed cavity and the second feed cavity, and the other end is correspondingly connected to the first feed cavity and the second feed cavity. A discharge port is provided at the bottom of the mixing tank. By adopting a vertical stirring structure, the present invention can well solve the problem of "floating" of rubber particles during the stirring process.

Description

Technical Field

[0001] The present invention specifically relates to a rubber particle mixed soil preparation device and a method for modular subgrade construction. Background Art

[0002] Rubber concrete is a new type of building material. Incorporating rubber particles into concrete not only provides a new way to solve the black pollution caused by waste tires, but also improves the toughness of concrete to a certain extent. The performance of rubber concrete is between that of ordinary concrete (rigid) and asphalt concrete (flexible), and it has good toughness, durability, crack resistance, shock absorption, impact resistance, noise reduction and sound insulation performance, etc. However, when mixing rubber particle mixed soil, the situation of uneven mixing of rubber particles and sand particles may occur. Therefore, in view of the uneven mixing of rubber particles and sand particles, the present invention provides a rubber particle mixed soil preparation equipment to solve the above technical problems. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a rubber particle mixed soil preparation device and a method for modular subgrade construction. The preparation device can well solve the "floating" problem of rubber particles during the mixing process by adopting a vertical mixing structure.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A rubber particle mixed soil preparation device, characterized in that: it includes a feed bin and a mixing tank. A through hole is provided at the bottom of the feed bin. The feed bin includes a first feed bin and a second feed bin. Rubber particles and sand particles are placed in the feed bin according to the mixing ratio. A rotating shaft is installed in the mixing tank. A feed cavity is installed along the circumferential direction of the rotating shaft. The feed cavity is installed vertically or obliquely on the rotating shaft. A mixing head communicated with the feed cavity is installed at the end of the feed cavity. A dropping hole is provided on the mixing head. The size of the mixing head is proportional to the distance from its axis of the mixing shaft. It also includes a feed pipe. One end of the feed pipe is respectively connected to the through holes at the bottoms of the first feed bin and the second feed bin, and the other end is respectively connected to the feed cavity. The rotation stroke of the rotating shaft is less than the distance of the maximum tensile strength of the feed pipe. An outlet is provided at the bottom of the mixing tank.

[0006] In the above structure: The present invention provides a rubber particle mixed soil preparation device, which includes a feed bin and a mixing tank. The feed bin includes a first feed bin and a second feed bin. Rubber particles and sand particles are placed in the feed bin according to the mixing ratio. If there are other types of fillers, the feed bin can be appropriately increased, and the feed pipes are correspondingly connected to different feed bins. A rotating shaft is installed in the mixing tank, and a feed cavity is installed along the circumferential direction of the rotating shaft. The feed cavity is installed vertically or obliquely on the rotating shaft, which facilitates the realization of vertical mixing of the fillers in the first feed bin and the second feed bin after they enter the feed cavity, thereby solving the problem of "floating" of rubber particles during the mixing process. Stirring heads are respectively installed at the ends of the feed cavity and are communicated with it. The rubber particles and sand particles are stirred in the stirring heads. Drop holes are provided on the stirring heads. After the stirring is completed, the rubber particle mixed soil falls into the mixing tank through the drop holes and is output through the discharge port below the mixing tank. The size of the stirring head is proportional to its distance from the axis of the stirring shaft, which can well ensure that the rubber particle mixed soil at different positions is stirred simultaneously, improving the stirring efficiency. One end of the feed pipe is respectively connected to the through holes at the bottoms of the first feed bin and the second feed bin, and the other end is connected to the feed cavity to realize the transportation of rubber particles and sand particles.

[0007] During use: The rubber particles and sand particles configured according to the mixing ratio are respectively put into the first feed bin and the second feed bin. The rubber particles and sand particles in the first feed bin and the second feed bin respectively enter the feed cavity through the feed pipes. The rotating shaft drives the feed cavity to swing back and forth, and the stirring heads installed on the feed cavity swing together, fully stirring the rubber particles and sand particles. After the stirring is completed, rubber particle mixed soil is formed. The rubber particle mixed soil falls into the mixing tank through the drop holes on the stirring heads and is output through the discharge port at the bottom of the mixing tank, and reaches the designated location after transportation.

[0008] As a preferred technical solution of the present invention: The feed bin is fixed above the mixing tank. The upper end face of the mixing tank is open. One end of the feed pipe is connected to the through hole, and the other end is connected to the feed cavity.

[0009] In the above structure: The upper end face of the mixing tank is open, which facilitates the installation of the feed pipe. One end of the feed pipe is connected to the through hole, and the other end is respectively connected to the feed cavity to realize feeding.

[0010] As a preferred technical solution of the present invention: A front plate is installed on the front of the feed bin, and the front plate is movably installed on the front of the mixing tank.

[0011] In the above structure: A front plate is installed on the front of the feed bin, and the front plate is movably installed on the front of the mixing tank. The front plate can be opened to repair and replace the parts in the mixing tank, which is very convenient.

[0012] As a preferred technical solution of the present invention: a back plate is installed on the back of the feed bin, a motor mounting bracket is fixedly installed on the back plate, a motor is installed on the motor mounting bracket, and the output shaft of the motor is connected to a rotating shaft.

[0013] In the above structure: a back plate is installed on the back of the feed bin, and a motor mounting bracket is fixedly installed on the back plate. The motor is installed and fixed through the motor mounting bracket, and the rotating shaft is rotated through the motor.

[0014] As a preferred technical solution of the present invention: the feed cavity includes a first feed cavity and a second feed cavity, and the first feed cavity and the second feed cavity are relatively vertically installed on the rotating shaft.

[0015] In the above structure: the first feed cavity and the second feed cavity are relatively vertically installed on the rotating shaft, which is convenient for the first feed cavity and the second feed cavity to perform vertical stirring, and the fillers therein can be fully mixed.

[0016] As a preferred technical solution of the present invention: the feed pipe is a hard pipe, and the inner hole diameter of the feed pipe is larger than the diameters of the rubber particles and the sand particles.

[0017] In the above structure: the feed pipe is a hard pipe with a certain flexibility, which is not only convenient for installation but also convenient for the rotating shaft to rotate. The inner hole diameter of the feed pipe is larger than the diameters of the rubber particles and the sand particles, which is convenient for transporting the rubber particles and the sand particles.

[0018] A method for modular subgrade construction, characterized by comprising the following steps

[0019] Put the rubber particles and sand particles configured according to the mixing ratio into the first feed bin and the second feed bin respectively. The rubber particles and sand particles in the first feed bin and the second feed bin enter the feed cavity through the feed pipes respectively. Turn on the motor, and the motor rotates, driving the rotating shaft to rotate together. The rotating shaft drives the feed cavity to swing reciprocally, and the stirring heads installed on the feed cavity swing together, fully stirring the rubber particles and sand particles. After the stirring is completed, rubber particle mixed soil is formed. The rubber particle mixed soil falls into the mixing box through the dropping holes on the stirring heads and is output through the discharge port at the bottom of the mixing box, and reaches the designated location after transportation;

[0020] Step 2: Lay geogrids at the designated location. The geogrids are laid in a staggered manner to form modular filler areas. The same amount of rubber particle mixed soil is layered in the modular filler areas, so that the amount of rubber particle mixed soil in each modular filler area is the same as the single-box filler stirring amount.

[0021] As a preferred technical solution of the present invention: In step 2: After each layer of filler is completed, an image processing method is used to measure the uniformity of the rubber particle mixed soil in the modular filler area. First, the modular filler area is photographed by a camera to achieve image acquisition. The original image corresponding to the photograph is preprocessed. The original image is binarized and corrected to obtain a binary image. The obtained binary image is segmented, and then the area percentage of rubber particles in the modular filler area is calculated through particle measurement and statistical analysis to obtain an opening and closing operation result image. If the area percentage of rubber particles in the modular filler area is abnormal, the rubber particle mixed soil in the modular filler area is adjusted to make the amount of rubber particle mixed soil in each module filler area the same as the single-box filler mixing amount.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] By providing a first feed chamber and a second feed chamber, the present invention enables a vertical mixing structure for rubber particles and sand particles, which can well solve the "floating" problem of rubber particles during the mixing process.

[0024] Also, according to the mixing ratio, different rubber particles and sand particles are respectively placed in different feed bins, enter the corresponding feed bins through the feed pipes, and slowly fall into the mixing tank through the holes on the mixing head. This structure makes the feeding of sand particles and rubber particles more uniform;

[0025] In the present invention, the mixing heads have different sizes and different distances from the axis of the rotating shaft, which can well ensure that the rubber particle mixed soil at different positions can be mixed simultaneously, increasing the working efficiency;

[0026] Applying the rubber particle mixed soil to the subgrade engineering, loading the same amount of rubber particle mixed soil in each modular filler area and ensuring that the amount of rubber particle mixed soil in each geogrid grid is the same as the single-box filler mixing amount can ensure that parameters such as the modulus, strength, and deformation of the rubber particle mixed soil in each geogrid grid on the subgrade are basically the same, and can ensure less differential settlement of the subgrade in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present application;

[0028] Figure 2 is a schematic diagram of the internal structure of the mixing tank in the present application;

[0029] Figure 3 is a schematic diagram of the back structure of the present application;

[0030] Figure 4 is a schematic diagram of the geogrid structure in the present application;

[0031] Figure 5 It is a physical diagram of image acquisition and processing;

[0032] Figure 6 It is an image acquisition diagram;

[0033] Figure 7 It is a schematic diagram of image processing principle.

[0034] List of reference numerals:

[0035] 1. First feed bin; 2. Second feed bin; 3. Stirring tank; 5. Feed cavity; 6. Stirring head; 7. Discharge port; 8. Rotating shaft; 9. Feed pipe; 10. Motor; 11. Motor mounting bracket; 12. Geogrid; 13. Modular packing area; 14. Camera. Specific embodiments

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0037] As Figures 1-4 shown: The present invention provides a device for preparing rubber particle mixed soil, which includes a feed bin and a stirring tank 3. The bottom of the feed bin is provided with through holes. The feed bin includes a first feed bin 1 and a second feed bin 2. Rubber particles and sand particles are placed in the feed bin according to the mixing ratio. A rotating shaft 8 is installed in the stirring tank 3. A feed cavity 5 is installed along the circumferential direction of the rotating shaft 8. The feed cavity 5 is installed vertically or obliquely on the rotating shaft 8. The end of the feed cavity 5 is installed with a stirring head 6 communicated with it. The stirring head 6 is provided with dropping holes. The size of the stirring head 6 is proportional to the distance from its axis of the stirring shaft. It also includes a feed pipe 9. One end of the feed pipe 9 is respectively connected to the through holes at the bottoms of the first feed bin 1 and the second feed bin 2, and the other end is respectively connected to the feed cavity 5. The rotation stroke of the rotating shaft 8 is less than the distance of the maximum tensile strength of the feed pipe 9. The bottom of the stirring tank 3 is provided with a discharge port 7.

[0038] A rubber particle mixed soil preparation device includes a feed bin and a mixing tank 3. The feed bin includes a first feed bin 1 and a second feed bin 2. Rubber particles and sand particles are placed in the feed bin according to the mixing ratio. If there are other types of fillers, the feed bin can be appropriately increased, and the feed pipe 9 can be corresponded to different feed bins. A rotating shaft 8 is installed in the mixing tank 3, and a feed cavity 5 is installed along the circumferential direction of the rotating shaft 8. The feed cavity 5 is installed vertically or obliquely on the rotating shaft 8, which is convenient to realize the vertical mixing of the fillers from the first feed bin 1 and the second feed bin 2 after entering the feed cavity 5, so as to solve the "floating" problem of rubber particles during the mixing process. Stirring heads 6 are respectively installed at the ends of the feed cavity 5 and are communicated with it. The rubber particles and sand particles are stirred in the stirring heads 6. Drop holes are provided on the stirring heads 6. After the mixing of the rubber particle mixed soil is completed, it falls into the mixing tank 3 through the drop holes and is output through the discharge port 7 at the bottom of the mixing tank 3. The size of the stirring head 6 is proportional to its distance from the axis of the stirring shaft, which can well ensure that the rubber particle mixed soil at different positions is stirred simultaneously, improving the stirring efficiency. One end of the feed pipe 9 is respectively connected to the through holes at the bottoms of the first feed bin 1 and the second feed bin 2, and the other end is correspondingly connected to the two feed cavities 5 to realize the transportation of rubber particles and sand particles.

[0039] During use: The rubber particles and sand particles configured according to the mixing ratio are respectively put into the first feed bin 1 and the second feed bin 2. The rubber particles and sand particles in the first feed bin 1 and the second feed bin 2 respectively enter the feed cavity 5 through the feed pipe 9. The rotating shaft 8 drives the feed cavity 5 to swing back and forth, and the stirring heads 6 installed on the feed cavity 5 swing together, fully stirring the rubber particles and sand particles. After the stirring is completed, rubber particle mixed soil is formed. The rubber particle mixed soil falls into the mixing tank 3 through the drop holes on the stirring heads 6 and is output through the discharge port 7 at the bottom of the mixing tank 3, and reaches the designated location after transportation.

[0040] In this embodiment: The feed bin is fixed above the mixing tank 3. The upper end face of the mixing tank 3 is open. One end of the feed pipe 9 is connected to the through hole and the other end is connected to the feed cavity 5. The upper end face of the mixing tank 3 being open is convenient for the installation of the feed pipe 9. One end of the feed pipe 9 is connected to the through hole and the other end is respectively connected to the feed cavity 5 to realize feeding.

[0041] In this embodiment: A front plate is installed on the front of the feed bin, and the front plate is movably installed on the front of the mixing tank 3. Installing a front plate on the front of the feed bin and movably installing the front plate on the front of the mixing tank 3 can open the front plate to repair and replace the parts in the mixing tank 3, which is very convenient.

[0042] In this embodiment: A back plate is installed on the back of the feed bin. A motor 10 mounting bracket is fixedly installed on the back plate. The motor 10 is installed on the motor 10 mounting bracket. The output shaft of the motor 10 is connected to the rotating shaft 8. A back plate is installed on the back of the feed bin. A motor 10 mounting bracket is fixedly installed on the back plate. The motor 10 is installed and fixed through the motor 10 mounting bracket. The rotating shaft 8 is rotated by the motor 10.

[0043] In this embodiment: The feed cavity 5 includes a first feed cavity and a second feed cavity. The first feed cavity and the second feed cavity are vertically installed opposite to each other on the rotating shaft 8. The first feed cavity and the second feed cavity are vertically installed opposite to each other on the rotating shaft 8, which is convenient for the first feed cavity and the second feed cavity to perform vertical stirring, and the fillers therein can be fully mixed.

[0044] In this embodiment: The feed pipe 9 is a hard pipe. The inner hole diameter of the feed pipe 9 is larger than the diameters of the rubber particles and the sand particles. The feed pipe 9 is a hard pipe with a certain flexibility, which is not only convenient for installation but also convenient for the rotation of the rotating shaft 8. The inner hole diameter of the feed pipe 9 is larger than the diameters of the rubber particles and the sand particles, which is convenient for transporting the rubber particles and the sand particles.

[0045] The method for modular subgrade construction includes the following steps.

[0046] Step 1: Put the rubber particles and sand particles configured according to the mixing ratio into the first feed bin 1 and the second feed bin 2 respectively. The rubber particles and sand particles in the first feed bin 1 and the second feed bin 2 enter the feed cavity 5 through the feed pipe 9 respectively. Turn on the motor 10. The motor 10 rotates, driving the rotating shaft 8 to rotate together. The rotating shaft 8 drives the feed cavity 5 to shake reciprocally. The stirring head 6 installed on the feed cavity 5 shakes together, fully stirring the rubber particles and sand particles. After the stirring is completed, rubber particle mixed soil is formed. The rubber particle mixed soil falls into the mixing box 3 through the dropping holes on the stirring head 6 and is output through the discharge port 7 at the bottom of the mixing box 3. After transportation, it reaches the designated location.

[0047] Step 2: Lay the geogrid 12 at the designated location. The geogrid 12 is laid staggeredly to form modular filling areas 13. The same amount of rubber particle mixed soil is layered into the modular filling areas 13, so that the amount of rubber particle mixed soil in each modular filling area 13 is the same as the single-box filling and stirring amount.

[0048] Such as Figures 5-6Shown as follows: where A is the original image; B is the grayscale image; C is the binary image; D is the result image of opening and closing operations. After each layer of filler is completed, the uniformity of the rubber particle mixture in the modular filler area 13 is measured by means of image processing. First, the modular filler area 13 is photographed by the camera 14 to achieve image acquisition. The original image corresponding to the photograph is pre-processed. The original image is binarized and corrected to obtain a binary image. The obtained binary image is segmented, and then the area percentage of rubber particles in the modular filler area 13 is calculated through particle measurement and statistical analysis to obtain the result image of opening and closing operations. If the area percentage of rubber particles in the modular filler area 13 is abnormal, the rubber particle mixture in the modular filler area 13 is adjusted to make the amount of rubber particle mixture in each modular filler area the same as the single-box filler mixing amount.

[0049] In the present invention, by providing a first feed chamber and a second feed chamber, a vertical stirring structure for rubber particles and sand particles is adopted, which can well solve the problem of "floating" of rubber particles during the stirring process.

[0050] Also, according to the mixing ratio, different rubber particles and sand particles are respectively placed into different feed bins, enter the corresponding feed bins through the feed pipes 9, and slowly fall into the mixing tank 3 through the holes on the stirring head 6. This structure makes the feeding of sand particles and rubber particles more uniform;

[0051] In the present invention, the sizes of the stirring heads 6 are different, and their distances from the axis of the rotating shaft 8 are also different, which can well ensure that the rubber particle mixtures at different positions can be stirred simultaneously, improving the working efficiency;

[0052] Applying the rubber particle mixture to the subgrade project, the same amount of rubber particle mixture is loaded into each modular filler area 13, and it is ensured that the amount of rubber particle mixture in each grid of the geogrid 12 is the same as the single-box filler mixing amount, which can ensure that the parameters such as modulus, strength, and deformation amount of the rubber particle mixture in each grid of the geogrid 12 on the subgrade are basically the same, and the differential settlement of the subgrade can be ensured to be small in the later stage.

[0053] The above is only a preferred embodiment of the present invention, and it is not any other form of limitation to the present invention. Any modification or equivalent change made according to the technical essence of the present invention still belongs to the scope protected by the present invention.

Claims

1. A rubber particle mixed soil preparation device, characterized in that: It includes a feed bin and a mixing tank (3). There is a through hole at the bottom of the feed bin. The feed bin includes a first feed bin (1) and a second feed bin (2). Rubber particles and sand particles are placed in the feed bin according to the mixing ratio. A rotating shaft (8) is installed in the mixing tank (3). An inlet chamber (5) is installed along the circumferential direction of the rotating shaft (8). The inlet chamber (5) is installed vertically or obliquely on the rotating shaft (8). A mixing head (6) communicated with it is installed at the end of the inlet chamber (5). Drop holes are provided on the mixing head (6). The size of the mixing head (6) is proportional to the distance from its axis of the mixing shaft. It also includes a feed pipe (9). One end of the feed pipe (9) is respectively connected to the through holes at the bottoms of the first feed bin (1) and the second feed bin (2), and the other end is respectively connected to the inlet chamber (5). The rotation stroke of the rotating shaft (8) is less than the distance of the maximum tensile strength of the feed pipe (9). An outlet (7) is provided at the bottom of the mixing tank (3).

2. The rubber particle mixed soil preparation device according to claim 1, characterized in that: The feed bin is fixed above the mixing tank (3). The upper end face of the mixing tank (3) is open. One end of the feed pipe (9) is connected to the through hole, and the other end is connected to the inlet chamber (5).

3. The rubber particle mixed soil preparation device according to claim 2, characterized in that: A front plate is installed on the front of the feed bin. The front plate is movably installed on the front of the mixing tank (3).

4. The rubber particle mixed soil preparation device according to claim 3, characterized in that: A back plate is installed on the back of the feed bin. A motor (10) mounting bracket is fixedly installed on the back plate. A motor (10) is installed on the motor (10) mounting bracket. The output shaft of the motor (10) is connected to the rotating shaft (8).

5. A rubber particle mixed soil preparation device according to claim 1, characterized in that: The inlet chamber (5) includes a first inlet chamber and a second inlet chamber. The first inlet chamber and the second inlet chamber are installed relatively vertically on the rotating shaft (8).

6. The rubber particle mixed soil preparation device according to claim 1, characterized in that: The feed pipe (9) is a rigid pipe. The inner hole diameter of the feed pipe (9) is larger than the diameters of the rubber particles and the sand particles.

7. A method for modular subgrade construction using the rubber particle mixed soil prepared by a rubber particle mixed soil preparation device according to any one of claims 1-6, characterized in that: It includes the following steps Step 1: Put the rubber particles and sand particles configured according to the mixing ratio into the first feed bin (1) and the second feed bin (2) respectively. The rubber particles and sand particles in the first feed bin (1) and the second feed bin (2) respectively enter the inlet chamber (5) through the feed pipe (9). Turn on the motor (10). The motor (10) rotates, driving the rotating shaft (8) to rotate together. The rotating shaft (8) drives the inlet chamber (5) to swing back and forth. The mixing head (6) installed on the inlet chamber (5) swings together, fully mixing the rubber particles and sand particles. After mixing, rubber particle mixed soil is formed. The rubber particle mixed soil falls into the mixing tank (3) through the drop holes on the mixing head (6) and is output through the outlet (7) at the bottom of the mixing tank (3). After transportation, it reaches the designated location; Step 2: Lay a geogrid (12) at the designated location. The geogrids (12) are laid in a staggered manner to form modular filling areas (13). The same amount of rubber particle mixed soil is layered and filled in the modular filling areas (13) so that the amount of rubber particle mixed soil in each modular filling area (13) is the same as the single - box filling and mixing amount.

8. The method for modular subgrade construction according to claim 7, characterized in that: In step 2: After each layer of filler is completed, an image processing method is used to measure the uniformity of the rubber particle mixed soil in the modular filler area (13). First, the modular filler area (13) is photographed by a camera (14) to achieve image acquisition. The original image corresponding to the photograph is pre-processed. The original image is binarized and corrected to obtain a binary image. The obtained binary image is segmented. Then, the area percentage of rubber particles in the modular filler area (13) is calculated through particle measurement and statistical analysis to obtain a result image of opening and closing operations. If the area percentage of rubber particles in the modular filler area (13) is abnormal, the rubber particle mixed soil in the modular filler area (13) is adjusted to make the amount of rubber particle mixed soil in each module filler area the same as the single-box filler stirring amount.

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