A multi-scale fiber dispersion device and working method

Abstract

The present invention relates to the field of concrete fiber dispersion technology, and specifically to a multi-scale fiber dispersion device and working method. The method is as follows: fibers are divided into three scales: microscopic, mesoscopic, and macroscopic, and dispersed in their corresponding dispersion channels according to their respective characteristics. After the dispersion is completed, the opening and closing knobs are controlled to guide the fibers through the guide bin into the feed channel, and finally, a high-pressure blower is used to blow the dispersed fibers through the feed channel into the concrete mixer. The device of the present invention integrates microscopic, mesoscopic, and macroscopic fiber dispersion functions, has a simple structure, strong practicality, and is flexible and convenient to use. It is applicable to all fiber concretes, can achieve the maximum uniform distribution of fibers in concrete, and significantly improve the performance of fiber concrete.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete fiber dispersion, and in particular to a multi-scale fiber dispersion device and a working method. Background Art

[0002] Ordinary concrete refers to cement concrete obtained by mixing cement as the binder, sand and stone as aggregates, and water (which may contain admixtures and additives) in a certain proportion. It is itself a brittle material with low flexural strength and tensile strength, easy to crack, and poor durability.

[0003] In order to better solve the problem of concrete's own defects, adding an appropriate amount of fiber to concrete can effectively improve the tensile and flexural strength of concrete, increase the ductility and crack resistance of concrete, and thus meet the material requirements of large-scale construction projects.

[0004] Fibers are primarily categorized as organic and inorganic. Organic fibers primarily include polypropylene, polyvinyl alcohol, polyacrylonitrile, and polyester fibers, while inorganic fibers primarily include steel fibers, basalt fibers, and whiskers. However, factory-produced organic fibers are in bundles, and if added directly to concrete, they can severely clump. In practical applications, the fibers must be evenly dispersed throughout the cementitious material to effectively maximize their performance. Current methods include manual dispersion, dispersants, and a "dry-then-wet" process. However, the former consumes significant labor and effort, while the latter can only disperse the fiber bundles in liquids and powders, failing to fully break them apart into single filaments. For steel fibers, manual and mechanically assisted dispersion methods are often used. Manual dispersion is time-consuming and labor-intensive, with low efficiency. Furthermore, improperly implemented protective measures can easily lead to injuries from steel fiber punctures. Mechanical dispersion can easily cause bending or cracking of the steel fibers due to rapid collisions with the steel fibers, and only breaks them into small clumps, failing to achieve the desired uniform dispersion throughout the concrete.

[0005] Existing measures cannot solve the problem of fiber agglomeration, are far from the monofilament dispersion state, and have poor dispersion effect. Dividing the fibers into monofilaments and better dispersing the fibers in concrete is crucial to optimizing the interface transition zone between the fibers and the cementitious material matrix and improving the performance of fiber concrete. Therefore, designing an efficient fiber dispersion device has great practical significance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: to address the deficiencies of the existing technology and provide a multi-scale fiber dispersion device and working method, which can make the fiber distribution in concrete more uniform and significantly improve the performance of fiber concrete.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A multi-scale fiber dispersion device includes a dispersion channel 4, wherein the dispersion channel 4 is divided into a microscopic fiber dispersion region 17, a mesoscopic fiber dispersion region 18, and a macroscopic fiber dispersion region 19 by a plurality of dispersion channel partitions 16;

[0009] The top of the microfiber dispersion area 17 is connected to the microfiber feeding bin 1, the top of the mesofiber dispersion area 18 is connected to the mesofiber feeding bin 2, and the top of the macrofiber dispersion area 19 is connected to the macrofiber feeding bin 3. The microfiber dispersion area 17, the mesofiber dispersion area 18 and the macrofiber dispersion area 19 are respectively connected to one end of three guide bins 10 through three opening and closing knobs 11, and the other ends of the three guide bins 10 are respectively connected to the feeding channel 14 through three opening and closing shafts 13;

[0010] An ultrasonic vibrator 8 is provided in the middle of the microscopic fiber dispersion area 17, an electron emitter 5 is provided in the middle of the mesoscopic fiber dispersion area 18, magnetic poles 9 are provided at both ends of the mesoscopic fiber dispersion area 18, and small fans 6 are provided at both ends of the macroscopic fiber dispersion area 19;

[0011] One end of the feeding channel 14 is provided with a high-pressure blower 12 , and the other end of the feeding channel 14 is communicated with a mixer 15 .

[0012] Furthermore, the macroscopic fibers are specifically hard inorganic fibers that are entangled in a mass, the microscopic fibers are specifically soft organic fibers in a bundle shape, and the microscopic fibers are specifically densely packed powdered fibers.

[0013] Furthermore, a connecting arm 7 is connected between the dispersion channel 4 and the feeding channel 14 .

[0014] Furthermore, the three opening and closing knobs 11 can be rotated to close and disconnect the connection between the two ends thereof, and the three opening and closing shafts 13 can be flipped to close and disconnect the connection between the two ends thereof.

[0015] Furthermore, the ultrasonic vibrator 8 is made of piezoelectric ceramic material and is used to evenly disperse the microscopic fibers through ultrasonic vibration.

[0016] Furthermore, the electron emitter 5 is used to emit charges to form a channel filled with like-charges in the microscopic fiber dispersion region 18 and charge the microscopic fibers, and cooperate with the magnetic pole 9 to evenly disperse the microscopic fibers.

[0017] Furthermore, the small fan 6 is used to evenly disperse the macro fibers.

[0018] A method for operating the multi-scale fiber dispersion device as described above specifically comprises the following steps:

[0019] S1, accurately weighing the raw materials required for fiber concrete: cementitious materials, sand, stone, fiber, water reducer, and water, and classifying the fibers into three sizes according to their appearance: macro fiber, meso fiber, and micro fiber;

[0020] S2, three sizes of fibers are fed into corresponding dispersion areas through three feeding bins;

[0021] S3, tighten the three opening and closing knobs to close the dispersion channel partition, so that the fibers of the three sizes are dispersed in their respective closed spaces;

[0022] S4, turning on the three opening and closing knobs to allow the dispersed fibers to enter the corresponding guide bins;

[0023] S5, start the mixer, pour the cementitious material, sand and stone into the mixer and dry mix for 1 minute;

[0024] S6, open the three opening and closing shafts in sequence, and use the high-pressure fan to push the fibers in the three guide bins into the mixer in batches through the feeding channel. Mix the water reducer and water evenly and then slowly pour them into the mixer. Stir for another 3 minutes to obtain fiber concrete.

[0025] Compared with the prior art, the present invention has the following main advantages:

[0026] 1. A multi-scale fiber dispersion device is provided. By separately setting up micro-fiber dispersion areas, meso-fiber dispersion areas, and macro-fiber dispersion areas, it can integrate micro-, meso-, and macro-fiber dispersion functions. It has a simple structure, strong practicality, and flexible and convenient use. It is suitable for most fiber concretes and can maximize the uniform distribution of fibers in concrete, significantly improving the performance of fiber concrete.

[0027] 2. A working method of a multi-scale fiber dispersion device is provided, which can disperse micro, meso and macro fibers at the same time and mix them with concrete in sequence, which can significantly improve the fiber dispersion efficiency, shorten the construction period and effectively save the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an overall schematic diagram of the multi-scale fiber dispersion device of the present invention;

[0029] Figure 2 Flowchart of the working method of the present invention.

[0030] In the figure: 1. Microfiber feed bin; 2. Mesofiber feed bin; 3. Macrofiber feed bin; 4. Dispersion channel; 5. Electron emitter; 6. Small fan; 7. Connecting arm; 8. Ultrasonic vibrator; 9. Magnetic pole; 10. Material guide bin; 11. Opening and closing knob; 12. High-pressure fan; 13. Opening and closing shaft; 14. Feeding channel; 15. Mixer; 16. Dispersion channel partition; 17. Microfiber dispersion area; 18. Mesofiber dispersion area; 19. Macrofiber dispersion area. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0032] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0033] The present invention provides a multi-scale fiber dispersion device and working method, which integrates microscopic, mesoscopic and macroscopic fiber dispersion functions. It has a simple structure, strong practicality, and is flexible and convenient to use. It is suitable for all fiber concretes and can achieve the maximum uniform distribution of fibers in concrete, significantly improving the performance of fiber concrete.

[0034] 1. Multi-scale fiber dispersion device structure

[0035] A multi-scale fiber dispersion device according to the present invention, such as Figure 1 As shown, it includes a microfiber feeding bin 1, a mesofiber feeding bin 2, a macrofiber feeding bin 3, a dispersion channel 4, a feeding channel 14, a high-pressure fan 12 and a mixer 15.

[0036] Specifically, the dispersion channel 4 is divided into a microscopic fiber dispersion region 17, a mesoscopic fiber dispersion region 18 and a macroscopic fiber dispersion region 19 by a plurality of dispersion channel partitions 16;

[0037] The top of the microfiber dispersion area 17 is connected to the microfiber feed bin 1, the top of the mesofiber dispersion area 18 is connected to the mesofiber feed bin 2, and the top of the macrofiber dispersion area 19 is connected to the macrofiber feed bin 3;

[0038] The microscopic fiber dispersion area 17, the mesoscopic fiber dispersion area 18, and the macroscopic fiber dispersion area 19 are respectively connected to one end of three material guide bins 10 via three opening and closing knobs 11, and the other ends of the three material guide bins 10 are respectively connected to the feeding channel 14 via three opening and closing shafts 13;

[0039] An ultrasonic vibrator 8 is provided in the middle of the microscopic fiber dispersion area 17, an electron emitter 5 is provided in the middle of the mesoscopic fiber dispersion area 18, magnetic poles 9 are provided at both ends of the mesoscopic fiber dispersion area 18, and small fans 6 are provided at both ends of the macroscopic fiber dispersion area 19;

[0040] A connecting arm 7 is connected between the dispersion channel 4 and the feeding channel 14 . A high-pressure blower 12 is provided at one end of the feeding channel 14 , and the other end of the feeding channel 14 is connected to a mixer 15 .

[0041] in:

[0042] The macro fibers are specifically hard and tangled inorganic fibers (such as ordinary steel fibers, copper-plated steel fibers, basalt fibers, carbon fibers, etc.);

[0043] The microscopic fibers are specifically soft bundles of organic fibers (such as PP, PAN, PET, PVA fibers, etc.);

[0044] The microscopic fibers are specifically densely packed powdered fiber materials (such as whiskers with a diameter of micrometers).

[0045] Furthermore, the three opening and closing knobs 11 can be rotated to close and disconnect the connection between the two ends thereof, and the three opening and closing shafts 13 can be flipped to close and disconnect the connection between the two ends thereof.

[0046] Furthermore, the ultrasonic vibrator 8 is specifically an ultrasonic transducer, typically made of piezoelectric ceramics or other magnetostrictive materials. It is used in the field of fiber dispersion to evenly disperse densely packed powdered fiber materials (microfibers). Ultrasonic waves are extremely short-wavelength mechanical waves with a frequency greater than 10,000 Hz and are currently widely used in cleaning, crushing, disinfection, and detection. An ultrasonic transducer is a device that converts electromagnetic energy into mechanical energy (acoustic energy).

[0047] Furthermore, the electron emitter 5 is specifically an electron gun, which is a device for generating, accelerating and converging high-energy-density electron beams. It can emit electron beams with a certain energy, a certain beam current, a speed and an angle. First, soft bundles of organic fibers (microfibers) are placed in a channel filled with like charges, and the fibers are charged by emitting electron beams, so that the fiber bundles are dispersed into a single-filament state under the mutual repulsion of like charges.

[0048] Furthermore, the small fan 6 is arranged at the four corners at both ends of the macro fiber dispersion area 19. Through design, the hard and tangled inorganic fibers (such as ordinary steel fibers, copper-plated steel fibers, basalt fibers, carbon fibers, etc.) can be evenly dispersed in the central position of the space to avoid the fibers from violently colliding with the dispersion channel and damaging the structure.

[0049] II. Working Methods

[0050] The raw material composition and mass percentage of the concrete in this example are as follows: the cementitious materials are 100 parts of PO 42.5 silicate cement, 21 parts of Grade II fly ash, 24 parts of Grade 95 mineral powder, 220 parts of 0-5 mm graded yellow sand, 294 parts of 5-20 mm graded gravel, 50 parts of water, 3.5 parts of polycarboxylate water reducer, and the fibers are macro, meso, and micro fibers.

[0051] The fiber dispersion measures in the prior art mainly include:

[0052] Methyl cellulose dispersant

[0053] ① Divide 50 parts of water into two halves, pour half of the water into a bucket, then add methyl cellulose dispersant and stir evenly, then add fiber to disperse it in the solution, and finally add water reducer to the other half of the water and stir evenly;

[0054] ② Dry-mix cement, fly ash, mineral powder, yellow sand and gravel for 1 minute, then pour in the fiber solution dispersed by the dispersant and the water reducer mixed solution, continue stirring for 3 minutes to obtain fiber concrete.

[0055] Dry first then wet dispersion

[0056] ①First, weigh the above-mentioned cementitious materials, sand, stone, fiber, water reducer and water accurately;

[0057] ②Pour the cementitious material, sand and stone into the mixer and dry mix for 1 minute;

[0058] ③Then evenly add the fiber during the dry material mixing process;

[0059] ④Finally, mix the water reducer and water evenly and slowly pour them into the mixer. Continue stirring for 3 minutes to obtain fiber concrete.

[0060] Based on the same inventive concept, the embodiment of the present application further provides a working method of a multi-scale fiber dispersion device, based on the multi-scale fiber dispersion device as described above, such as Figure 2 As shown, the specific steps include:

[0061] ① Accurately weigh the raw materials required for fiber concrete: cementitious materials, sand, stone, fiber, water reducer, and water, and classify the fibers into three sizes according to their appearance: macro fiber, meso fiber, and micro fiber;

[0062] ②Through three feeding bins, fibers of three sizes are fed into corresponding dispersion areas;

[0063] ③ Tighten the three opening and closing knobs to close the dispersion channel partition, so that the fibers of the three sizes can be dispersed in their respective closed spaces;

[0064] ④ Open the three opening and closing knobs to allow the dispersed fibers to enter the corresponding guide bins;

[0065] ⑤ Start the mixer, pour the cementitious material, sand and stone into the mixer and dry mix for 1 minute;

[0066] ⑥ Open the three opening and closing shafts in sequence, and use the high-pressure fan to push the fibers in the three guide bins into the concrete mixer in batches through the feeding channel. Mix the water reducer and water evenly and then slowly pour them into the mixer. Stir for another 3 minutes to obtain fiber concrete.

[0067] in:

[0068] The macro fibers are specifically hard and tangled inorganic fibers (such as ordinary steel fibers, copper-plated steel fibers, basalt fibers, carbon fibers, etc.);

[0069] The microscopic fibers are specifically soft bundles of organic fibers (such as PP, PAN, PET, PVA fibers, etc.);

[0070] The microscopic fibers are specifically densely packed powdered fiber materials (such as whiskers with a diameter of micrometers).

[0071] In summary, the concrete performance comparison test shows that the working method of the multi-scale fiber dispersion device of the present invention:

[0072] 1. The dispersion measures of the existing technology are time-consuming and labor-intensive, and the dispersion effect is extremely unsatisfactory. In addition, the existing measures and processes are only for the dispersion of single-scale fibers and lack application in the integrated dispersion of multi-scale fibers. The device of the present invention can significantly improve the dispersion efficiency, shorten the construction period, and effectively save the overall cost.

[0073] 2. The invented device integrates microscopic, mesoscopic and macroscopic fiber dispersion functions. It has a simple structure, strong practicality, and is flexible and convenient to use. It is suitable for all fiber concretes and can achieve the maximum uniform distribution of fibers in concrete, significantly improving the performance of fiber concrete.

[0074] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for operating a multi-scale fiber dispersion device, characterized in that: The multi-scale fiber dispersion device comprises a dispersion channel (4), wherein the dispersion channel (4) is divided into a microscopic fiber dispersion region (17), a mesoscopic fiber dispersion region (18), and a macroscopic fiber dispersion region (19) by a plurality of dispersion channel partitions (16); The top of the microfiber dispersion region (17) is connected to a microfiber feed bin (1), the top of the microfiber dispersion region (18) is connected to a microfiber feed bin (2), and the top of the macrofiber dispersion region (19) is connected to a macrofiber feed bin (3). The microfiber dispersion region (17), the microfiber dispersion region (18), and the macrofiber dispersion region (19) are respectively connected to one end of three guide bins (10) via three opening and closing knobs (11), and the other ends of the three guide bins (10) are respectively connected to the feeding channel (14) via three opening and closing shafts (13); An ultrasonic vibrator (8) is provided in the middle of the microscopic fiber dispersion region (17), an electron emitter (5) is provided in the middle of the mesoscopic fiber dispersion region (18), magnetic poles (9) are provided at both ends of the mesoscopic fiber dispersion region (18), and small fans (6) are provided at both ends of the macroscopic fiber dispersion region (19), and the small fans (6) are provided at four corners at both ends of the macroscopic fiber dispersion region (19); A high-pressure blower (12) is provided at one end of the feeding channel (14), and the other end of the feeding channel (14) is connected to a mixer (15); The working method comprises the following steps: S1, accurately weighing the raw materials required for fiber concrete: cementitious materials, sand, stone, fiber, water reducer, and water, and classifying the fibers into three sizes according to their appearance: macro fiber, meso fiber, and micro fiber; S2, three sizes of fibers are fed into corresponding dispersion areas through three feeding bins; S3, tighten the three opening and closing knobs to close the dispersion channel partition, so that the fibers of the three sizes are dispersed in their respective closed spaces; S4, turning on the three opening and closing knobs to allow the dispersed fibers to enter the corresponding guide bins; S5, start the mixer, pour the cementitious material, sand and stone into the mixer and dry mix for 1 minute; S6, open the three opening and closing shafts in sequence, and use the high-pressure fan to push the fibers in the three guide bins into the mixer in batches through the feeding channel. Mix the water reducer and water evenly and then slowly pour them into the mixer. Stir for another 3 minutes to obtain fiber concrete.

2. The working method of a multi-scale fiber dispersion device according to claim 1, characterized in that: The macroscopic fibers are specifically hard inorganic fibers that are entangled in a mass, the microscopic fibers are specifically soft organic fibers in a bundle, and the microscopic fibers are specifically densely packed powdered fibers.

3. The working method of a multi-scale fiber dispersion device according to claim 1, characterized in that: A connecting arm (7) is connected between the dispersion channel (4) and the feeding channel (14).

4. The operating method of a multi-scale fiber dispersion device according to claim 1, characterized in that: The three opening and closing knobs (11) can all be rotated to close and thus disconnect the connection between the two ends thereof, and the three opening and closing shafts (13) can all be flipped to close and thus disconnect the connection between the two ends thereof.

5. The operating method of the multi-scale fiber dispersion device according to claim 1, characterized in that: The ultrasonic vibrator (8) is made of piezoelectric ceramic material and is used to evenly disperse the microscopic fibers through ultrasonic vibration.

6. The operating method of the multi-scale fiber dispersion device according to claim 1, characterized in that: The electron emitter (5) is used to emit electric charges so that the microscopic fiber dispersion area (18) forms a channel filled with like-charges, and charges the microscopic fibers, and cooperates with the magnetic pole (9) to evenly disperse the microscopic fibers.

7. The operating method of the multi-scale fiber dispersion device according to claim 1, characterized in that: The small blower (6) is used to evenly disperse the macro fibers.

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