CN117960060B - Microcapsule preparation device for self-healing concrete - Google Patents
Microcapsule preparation device for self-healing concrete Download PDFInfo
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- CN117960060B CN117960060B CN202410362219.XA CN202410362219A CN117960060B CN 117960060 B CN117960060 B CN 117960060B CN 202410362219 A CN202410362219 A CN 202410362219A CN 117960060 B CN117960060 B CN 117960060B
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- 239000003094 microcapsule Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 60
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000003756 stirring Methods 0.000 claims abstract description 64
- 239000002994 raw material Substances 0.000 claims abstract description 48
- 238000002156 mixing Methods 0.000 claims abstract description 47
- 239000002775 capsule Substances 0.000 claims abstract description 46
- 229920001661 Chitosan Polymers 0.000 claims abstract description 24
- 239000001856 Ethyl cellulose Substances 0.000 claims abstract description 22
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229920001249 ethyl cellulose Polymers 0.000 claims abstract description 22
- 235000019325 ethyl cellulose Nutrition 0.000 claims abstract description 22
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 21
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 21
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 21
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 description 50
- 239000011162 core material Substances 0.000 description 12
- 238000009434 installation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011550 stock solution Substances 0.000 description 5
- 230000001788 irregular Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000003760 magnetic stirring Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Landscapes
- Manufacturing Of Micro-Capsules (AREA)
Abstract
The invention relates to the technical field of self-healing concrete, in particular to a microcapsule preparation device for self-healing concrete, which comprises a capsule wall preparation module, a capsule core preparation module and a microcapsule forming module, wherein the capsule wall preparation module and the capsule core preparation module are respectively connected with the microcapsule forming module through pipelines. The capsule wall preparation module comprises an ethyl cellulose raw material tank, a hydroxypropyl methyl cellulose raw material tank, an absolute ethyl alcohol raw material tank, a chitosan raw material tank, an acetic acid solution raw material tank, a stirring unit and a mixing unit, wherein the ethyl cellulose raw material tank, the hydroxypropyl methyl cellulose raw material tank and the absolute ethyl alcohol raw material tank are respectively connected with the stirring unit through pipelines, the chitosan raw material tank and the acetic acid solution raw material tank are respectively connected with the mixing unit through pipelines, the stirring unit is connected with the mixing unit through pipelines, and the prepared capsule wall solution is conveyed into the mixing unit through the pipelines. The invention synthesizes the original separated modules together through the pipeline, thereby realizing continuous preparation of the microcapsules.
Description
Technical Field
The invention relates to the technical field of self-healing concrete, in particular to a microcapsule preparation device for self-healing concrete.
Background
Self-healing concrete is a new building material with self-repairing ability, which can self-fill cracks when the concrete cracks, thereby prolonging the service life of the concrete structure and improving the durability. The material provides a new idea for solving the problems of cracks and damage generated in the use process of the concrete structure.
The principle of self-healing concrete is to introduce a self-healing system on a microscopic scale into the concrete, where the usual approach is to introduce microorganisms or polymers. When the concrete cracks, these microorganisms or polymers are activated, filling the cracks and forming new materials to restore the integrity of the concrete.
In the prior art, the polymer is usually added into the concrete by using a microcapsule, but the microcapsule can only be prepared for many times in small dosage, that is, each preparation step in the prior art needs to manually replace equipment and devices, particularly a final drying link, which is the link with the highest time consumption and cost.
Disclosure of Invention
The invention aims to provide a microcapsule preparation device for self-healing concrete, so as to solve the problems.
The invention is realized by the following technical scheme:
the microcapsule preparation device for the self-healing concrete comprises a capsule wall preparation module, a capsule core preparation module and a microcapsule forming module, wherein the capsule wall preparation module and the capsule core preparation module are respectively connected with the microcapsule forming module through pipelines.
The capsule wall preparation module comprises an ethyl cellulose raw material tank, a hydroxypropyl methyl cellulose raw material tank, an absolute ethyl alcohol raw material tank, a chitosan raw material tank, an acetic acid solution raw material tank, a stirring unit and a mixing unit, wherein the ethyl cellulose raw material tank, the hydroxypropyl methyl cellulose raw material tank and the absolute ethyl alcohol raw material tank are respectively connected with the stirring unit through pipelines, the chitosan raw material tank and the acetic acid solution raw material tank are respectively connected with the mixing unit through pipelines, the stirring unit is connected with the mixing unit through pipelines, and the prepared capsule wall solution is conveyed into the microcapsule forming module through the mixing unit.
In the prior art, the microcapsule for self-healing concrete has micro once preparation amount, that is, in large-scale engineering application, the efficiency and the cost of the microcapsule can not be normally put into use.
In the invention, the stirring unit and the mixing unit play different roles, and as the ethyl cellulose and the hydroxypropyl methylcellulose are required to be fully dissolved in the absolute ethyl alcohol and then are mixed with the chitosan and the acetic acid solution in the preparation of the capsule wall solution, the stirring module is used for fully dissolving the ethyl cellulose and the hydroxypropyl methylcellulose in the absolute ethyl alcohol, and the mixing module simultaneously realizes the mixing of the chitosan and the acetic acid solution and the mixing of the two mixed solutions, thereby realizing the accurate and efficient preparation of the capsule wall solution.
Preferably, the microcapsule forming module comprises a shell, a spraying unit and a drying unit. Wherein the casing is hollow cylinder, and the spraying unit installation is fixed in the inside upper end of casing, and drying unit installation is fixed in the inside lower extreme of casing, and mixing element passes through the pipe connection with the spraying unit, still is equipped with the discharge gate on the casing.
In the invention, the microcapsule forming module uses a new combination of a spraying unit and a drying unit, and the flow rate of air in the shell is increased by utilizing the speed of accelerated air, so that the capsule core is blown up in the shell, repeatedly contacted with the capsule wall solution, and rapidly dried and formed, and meanwhile, the production efficiency is also improved.
Preferably, the casing is the hollow cylinder of no upper end and lower end, is equipped with the installation department that is used for installing spraying unit in the casing upper end, is equipped with the installation department that is used for installing drying unit in the casing lower extreme, and wherein spraying unit includes stock solution bottle, nozzle, booster pump, and wherein booster pump one end is installed and is fixed on the stock solution bottle, and the booster pump other end is installed and is fixed with the nozzle, is equipped with the installation lid on the stock solution bottle, and the installation lid is installed with the installation department cooperation, and wherein the one end of installation nozzle is downward in the stock solution bottle.
In the invention, the spraying unit is arranged on the shell, and the liquid storage bottle, the nozzle and the booster pump are integrated together, so that the occupied space of equipment is reduced, the waste of the capsule wall solution in the pipeline is reduced, and the production cost is reduced.
Preferably, the drying unit comprises a hollow baffle, an air duct and a fan, wherein the air duct is a hollow cylinder without a cover and a bottom, the fan is fixed on the side surface of the air duct through pipeline installation, high-pressure air flow is pressed into the cylinder wall of the air duct, and the hollow baffle is fixed at the upper end of the air duct.
In the invention, the air duct of the drying unit is a hollow cylinder without a cover and a bottom, firstly, the air duct is a hollow cylinder without a cover and a bottom, when the microcapsule is dried, the microcapsule can be directly taken out from the lower part of the air duct, so that the possibility of faults caused by frequent switching of equipment is reduced.
Preferably, the section of the wall of the air duct is in a fusiform shape, wherein the radius of one end of the section of the wall is smaller than that of the other end.
In the invention, the section of the cylinder wall of the air cylinder is shuttle-shaped, and the flow speed of compressed air can be increased again when the compressed air rotates in the cylinder wall, so that the air output of the air cylinder is increased by more than 75%.
Preferably, the distance between the cylinder walls at the air outlet is 0.05-0.5mm, and the upper surface of the hollowed-out baffle plate and the lower plane of the air outlet are in the same horizontal plane.
According to the invention, the distance between the cylinder walls at the air outlet is 0.05-0.5mm, so that the structural strength is ensured, and the wind speed is maximized.
Preferably, the liquid storage bottle comprises a bottle body, an automatic valve, a stirring device and a preparation chamber, wherein the bottle body is a hollow cylinder or a hollow cuboid, three feeding ports are formed in a top plate of the bottle body and are respectively connected with a chitosan raw material tank, an acetic acid solution raw material tank and a stirring unit through pipelines, an arc-shaped concave bottom plate is arranged at the bottom of the bottle body, the automatic valve is fixedly arranged at the concave center of the bottom plate, the stirring device is fixedly arranged on the inner side wall of the bottle body, at least two stirring devices are arranged, the preparation chamber is fixedly arranged at the outer side of the bottom of the bottle body and is a hollow cylinder or a hollow cuboid, and a booster pump and a nozzle are fixedly arranged at the bottom of the preparation chamber.
The stirring device comprises a rotating shaft and stirring rods, wherein the stirring rods are installed and fixed on the rotating shaft, the rotating shaft is intersected with the axis of the stirring rods and is mutually perpendicular, and at least 12 stirring rods are installed on each rotating shaft so as to realize the full mixing of microcapsule wall material solutions.
The mixing unit is integrated in the liquid storage bottle of the spraying unit, so that the residue of the prepared microcapsule wall material solution in the pipeline is reduced, and the possibility of blockage caused by natural drying of the microcapsule wall material solution in the pipeline is avoided.
Preferably, the stirring rod comprises a fixed rod, a rotating head and a miniature motor, wherein one end of the fixed rod is fixedly arranged on the rotating shaft, the rotating head is fixedly arranged at the other end of the fixed rod, a machine body of the miniature motor is fixedly arranged inside the fixed rod, and a rotating part of the miniature motor is fixedly arranged in the rotating head, wherein the rotating head comprises a horizontal rotating head and an inclined rotating head.
In the prior art, the viscosity of the microcapsule wall material solution is high, so that the difficulty of full mixing is high, and high-efficiency mixing can be realized only by a large amount of irregular movement in the stirring process.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. In the prior art, the microcapsule for self-healing concrete has the once preparation amount which is micro, namely, in large-scale engineering application, the efficiency and the cost of the microcapsule can not be normally put into use, and the microcapsule is prepared continuously by arranging a capsule wall preparation module, a capsule core preparation module and a microcapsule forming module and synthesizing the originally separated modules together through a pipeline;
2. In the invention, the stirring unit and the mixing unit play different roles, and as the ethyl cellulose and the hydroxypropyl methylcellulose are required to be fully dissolved in the absolute ethyl alcohol and then are mixed with the chitosan and the acetic acid solution in the preparation of the capsule wall solution, the stirring module is used for fully dissolving the ethyl cellulose and the hydroxypropyl methylcellulose in the absolute ethyl alcohol, and the mixing module simultaneously realizes the mixing of the chitosan and the acetic acid solution and the mixing of the two mixed solutions, thereby realizing the accurate and efficient preparation of the capsule wall solution;
3. in the invention, the microcapsule forming module uses the new combination of the spraying unit and the drying unit, and the flow rate of air in the shell is increased by utilizing the accelerated air flow rate, so that the capsule core is blown up in the shell, is repeatedly contacted with the capsule wall solution, is quickly dried and formed, and simultaneously improves the production efficiency;
4. In the invention, the spraying unit is arranged on the shell, and the liquid storage bottle, the nozzle and the booster pump are integrated together, so that the occupied space of equipment is reduced, the waste of the capsule wall solution in the pipeline is reduced, and the production cost is reduced;
5. In the invention, the air duct of the drying unit is a hollow cylinder without a cover and a bottom, firstly, the air duct is a hollow cylinder without a cover and a bottom, when the microcapsule is dried, the microcapsule can be directly taken out from the lower part of the air duct, so that the possibility of faults caused by frequent switching of equipment is reduced;
6. In the invention, the section of the wall of the air duct is in a fusiform shape, and the flow speed of compressed air can be increased again when the compressed air rotates in the wall of the air duct, so that the air output of the air duct is increased by more than 75%, the distance between the walls of the air outlet is 0.05-0.5mm, and the maximization of the air speed is realized while the structural strength is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic diagram of the connection relationship of the present invention;
FIG. 2 is a schematic diagram of the connection relationship of the capsule wall preparation module according to the present invention;
FIG. 3 is a schematic diagram I of a microcapsule forming module structure;
FIG. 4 is an enlarged view of the cartridge of FIG. 3;
FIG. 5 is a schematic diagram II of a microcapsule forming module structure;
FIG. 6 is an enlarged view of the cartridge of FIG. 4;
FIG. 7 is a schematic diagram showing the structure of a microcapsule molding module in example 3;
fig. 8 is an enlarged view of the mixing unit of embodiment 3;
FIG. 9 is an enlarged view of the shaft and stirring bar of example 4.
The reference numerals are represented as follows: 1-shell, 2-spraying unit, 21-stock solution bottle, 22-nozzle, 23-booster pump, 3-drying unit, 31-fretwork separation blade, 32-dryer, 33-fan, 4-body, 5-automatic valve, 6-agitating unit, 7-preparation room, 8-pivot, 9-stirring rod, 10-dead lever, 11-tilting swivel, 12-micro motor, 13-horizontal swivel.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that if the terms "first," "second," and the like are referred to in the description of the present application and the claims and the above figures, they are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, if the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, if the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are referred to, the indicated azimuth or positional relationship is based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Further, in the present application, the terms "mounted," "configured," "provided," "connected," "sleeved," and the like are to be construed broadly if they relate to. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
The formulation of the microcapsules prepared in this example is as follows:
A microcapsule core comprising 25-27% by mass of an expanding agent, 32-34% by mass of a crystallization reactant, 0.6-0.7% by mass of a penetrating crystalline material; adding 33-35% of humidity regulator, and uniformly mixing and stirring;
microcapsule walls comprising ethylcellulose, absolute ethanol, hydroxypropyl methylcellulose, chitosan, and acetic acid solution;
as shown in fig. 1 to 4, a microcapsule preparation device for self-healing concrete comprises a capsule wall preparation module, a capsule core preparation module and a microcapsule forming module, wherein the capsule wall preparation module and the capsule core preparation module are respectively connected with the microcapsule forming module through pipelines.
The capsule wall preparation module comprises an ethyl cellulose raw material tank, a hydroxypropyl methyl cellulose raw material tank, an absolute ethyl alcohol raw material tank, a chitosan raw material tank, an acetic acid solution raw material tank, a stirring unit and a mixing unit, wherein the ethyl cellulose raw material tank, the hydroxypropyl methyl cellulose raw material tank and the absolute ethyl alcohol raw material tank are respectively connected with the stirring unit through pipelines, the chitosan raw material tank and the acetic acid solution raw material tank are respectively connected with the mixing unit through pipelines, the stirring unit is connected with the mixing unit through pipelines, and the prepared capsule wall solution is conveyed into the microcapsule forming module through the mixing unit.
It will be appreciated that the capsule core preparation module of this embodiment uses a spheronizer of the prior art.
It will be appreciated that the ethyl cellulose feed tank, hydroxypropyl methyl cellulose feed tank, absolute ethanol feed tank, chitosan feed tank, acetic acid solution feed tank in this embodiment serve as containers for the corresponding solutions, and are provided with a valve switch, that is, any prior art that can achieve the above effects can be substituted therefor.
In this embodiment, the stirring unit is the prior art, and the sufficient fusion of the ethylcellulose, the hydroxypropyl methylcellulose and the absolute ethanol is achieved through the blade or the stirring device inside the stirring unit.
In this embodiment, the mixing unit uses a magnetic stirring device, and 3 feeding ports are arranged on the magnetic stirring device and are respectively connected with the stirring unit, the chitosan raw material tank and the acetic acid solution raw material tank through pipelines.
In the prior art, the microcapsule for self-healing concrete has micro once preparation amount, that is, in large-scale engineering application, the efficiency and the cost of the microcapsule can not be normally put into use.
In the invention, the stirring unit and the mixing unit play different roles, and as the ethyl cellulose and the hydroxypropyl methylcellulose are required to be fully dissolved in the absolute ethyl alcohol and then are mixed with the chitosan and the acetic acid solution in the preparation of the capsule wall solution, the stirring module is used for fully dissolving the ethyl cellulose and the hydroxypropyl methylcellulose in the absolute ethyl alcohol, and the mixing module simultaneously realizes the mixing of the chitosan and the acetic acid solution and the mixing of the two mixed solutions, thereby realizing the accurate and efficient preparation of the capsule wall solution.
Preferably, the microcapsule forming module comprises a shell 1, a spraying unit 2 and a drying unit 3. Wherein casing 1 is hollow cylinder, and spraying unit 2 installs and fixes in the inside upper end of casing 1, and drying unit 3 installs and fixes in the inside lower extreme of casing 1, and mixing unit passes through the pipe connection with spraying unit 2, still is equipped with the discharge gate on casing 1.
In the present invention, the microcapsule forming module uses a new combination of the spraying unit 2 and the drying unit 3, and increases the flow rate of air in the shell 1 by accelerating the air flow rate, blows the capsule core in the shell 1, makes it repeatedly contact with the capsule wall solution, and rapidly dries and forms, and also improves the production efficiency.
Preferably, the shell 1 is a hollow cylinder without an upper bottom and a lower bottom, a mounting part for mounting the spraying unit 2 is arranged at the upper end of the shell 1, a mounting part for mounting the drying unit 3 is arranged at the lower end of the shell 1, wherein the spraying unit 2 comprises a liquid storage bottle 21, a nozzle 22 and a booster pump 23, one end of the booster pump 23 is fixedly arranged on the liquid storage bottle 21, the other end of the booster pump 23 is fixedly provided with the nozzle 22, a mounting cover is arranged on the liquid storage bottle 21 and is matched with the mounting part, and one end of the mounting nozzle 22 in the liquid storage bottle 21 faces downwards.
In the invention, the spraying unit 2 is arranged on the shell 1, and the liquid storage bottle 21, the nozzle 22 and the booster pump 23 are integrated together, so that the occupied space of equipment is reduced, the waste of the capsule wall solution in a pipeline is reduced, and the production cost is reduced.
In this embodiment, the drying unit 3 includes a hollow baffle 31, an air duct 32, and a fan 33, where the air duct 32 is a hollow cylinder without a cover and a bottom, the inner wall of the air duct 32 is also hollow, an air outlet is provided at the upper end of the inner wall of the air duct 32, the fan 33 is fixed on the side of the air duct 32 through a pipeline, the high-pressure air flow presses the air duct 32 into the air duct wall, and the hollow baffle 31 is fixed at the upper end of the air duct 32.
In the invention, the air duct 32 of the drying unit 3 is a hollow cylinder without cover and bottom, wherein the inner part of the wall of the air duct 32 is hollow, and the upper end of the inner wall of the air duct 32 is provided with an air outlet, firstly, the air duct 32 is a hollow cylinder without cover and bottom, when the microcapsule is dried, the microcapsule can be directly taken out from the lower part of the air duct 32, the possibility of equipment failure caused by frequent switching is reduced, in addition, the inner part of the wall of the air duct 32 is hollow, and the upper end of the inner wall of the air duct 32 is provided with the air outlet, so that the blowing flow of the air duct 32 is doubled by the Bernoulli principle, and a heating device is not required to be used for drying the air duct, thereby improving the efficiency and saving the electric power cost.
In this embodiment, the cross-sectional shape of the barrel wall of the air barrel 32 is a shuttle shape in which the radius of one end of the cross-section of the barrel wall is smaller than the radius of the other end.
In this embodiment, the cross-section of the wall of the air duct 32 is shuttle-shaped, and the compressed air will increase the flow rate again when rotating in the wall of the air duct 32, so that the air output of the air duct 32 increases by more than 75%.
In this embodiment, the distance between the walls of the air outlet is 0.1mm.
Example 2
According to fig. 5-6, on the basis of embodiment 1, the upper surface of the hollowed-out baffle 31 is on the same horizontal plane with the lower plane of the air outlet. The wind speed is maximized while the structural strength is ensured.
The working process comprises the following steps: adding 1-3 parts by weight of ethyl cellulose, 0.5-1.5 parts by weight of hydroxypropyl methyl cellulose and 96.5-98.5 parts by weight of absolute ethyl alcohol into a stirring unit, and stirring for 5-15min to fully dissolve the ethyl cellulose to obtain an ethyl cellulose and hydroxypropyl methyl cellulose mixed solution; simultaneously adding 2-3 parts by weight of chitosan and 97-98 parts by weight of acetic acid solution with the concentration of 2-3% into a mixing unit to fully dissolve the chitosan and the acetic acid solution to obtain a chitosan solution; adding the mixed solution of ethyl cellulose and hydroxypropyl methylcellulose into a mixing unit, wherein the volume part of the mixed solution of ethyl cellulose and hydroxypropyl methylcellulose is 8-10 parts, the volume part of the chitosan solution is 1-5 parts, and then fully stirring in the mixing unit to obtain microcapsule wall material solution;
the microcapsule wall material solution enters the spraying unit 2 through a pipeline, then a fan 33 of the drying unit 3 is started, then the capsule core is added into the shell 1 through the pipeline, the spraying unit 2 sprays the capsule wall material solution on the surface of the capsule core material to form a coating film, and the surface of the microcapsule forms a uniform continuous coating film through the drying unit 3, so that the self-repairing microcapsule is obtained.
Example 3
According to fig. 7 to 8, on the basis of example 2 or example 3, unlike this, the mixing unit is integrated in the reservoir 21 of the spraying unit 2, the specific structure of the reservoir 21 is as follows:
The liquid storage bottle 21 comprises a bottle body 4, an automatic valve 5, stirring devices 6 and a preparation chamber 7, wherein the bottle body 4 is a hollow cylinder or a hollow cuboid, three feeding ports are formed in a top plate of the bottle body 4 and are respectively connected with a chitosan raw material tank, an acetic acid solution raw material tank and a stirring unit through pipelines, an arc-shaped concave bottom plate is arranged at the bottom of the bottle body 4, the automatic valve 5 is fixedly arranged at the concave center of the bottom plate, the stirring devices 6 are fixedly arranged on the inner side wall of the bottle body 4, at least two stirring devices 6 are arranged, the preparation chamber 7 is fixedly arranged outside the bottom of the bottle body 4, the preparation chamber 7 is a hollow cylinder or a hollow cuboid, and a booster pump 23 and a nozzle 22 are fixedly arranged at the bottom of the preparation chamber 7.
The stirring device 6 comprises a rotating shaft 8 and stirring rods 9, wherein the stirring rods 9 are fixedly arranged on the rotating shaft 8, the rotating shaft 8 is intersected with the axis of the stirring rods 9 and is mutually perpendicular, and at least 12 stirring rods 9 are arranged on each rotating shaft 8 so as to realize the full mixing of microcapsule wall material solutions.
It will be appreciated that the stirring device 6 is driven in rotation by a motor in a manner known in the art.
It should be understood that in this embodiment, the automatic valve 5 is a signal-controllable automatic gate valve for controlling the outflow of the microcapsule wall material solution, and it should be noted that any of the prior art techniques for achieving the above functions may be substituted therefor.
In this embodiment, the mixing unit is integrated in the liquid storage bottle 21 of the spraying unit 2, so that the residue of the prepared microcapsule wall material solution in the pipeline is reduced, and the possibility of blockage caused by natural drying of the microcapsule wall material solution in the pipeline is avoided.
Example 4
On the basis of embodiment 3, unlike embodiment 3, according to fig. 8, the stirring rod 9 includes a fixing rod 10, a rotating head, a micro motor 12, wherein one end of the fixing rod 10 is fixed on the rotating shaft 8, the rotating head is fixed on the other end of the fixing rod 10, a body of the micro motor 12 is fixed inside the fixing rod 10, and a rotating part of the micro motor 12 is fixed in the rotating head, wherein the rotating head includes a horizontal rotating head 13 and an inclined rotating head 11.
Since the viscosity of the microcapsule wall material solution is high in the prior art, the difficulty of full mixing is high, and efficient mixing can be realized by a large amount of irregular movement in the stirring process, while the double motor is used in the invention, the rotating shaft 8 revolves, and the rotating head on the stirring rod 9 rotates, and in addition, the rotating head comprises a horizontal rotating head 13 and a tilting rotating head 11, in the embodiment, two tilting rotating heads 11 and one horizontal rotating head 13 are combined on the same horizontal line, wherein the tilting rotating heads 11 are symmetrically arranged by taking the horizontal rotating head 13 as a symmetrical axis, that is, the tilting angles of the two tilting rotating heads 11 are opposite. In this embodiment, a combination of 4 groups of the above-mentioned inclined rotating heads 11 and the horizontal rotating heads 13 are arranged on the rotating shaft altogether, wherein the inclined rotating heads 11 close to the bottle body 4 push the microcapsule wall material solution to the bottle body and rebound, and the other inclined rotating heads 11 push the microcapsule wall material solution in the middle of the bottle body to the edge, and in addition, the rotating shafts 8 are matched with the rotation of the rotating shafts themselves, so that a great amount of irregular motion is generated in the stirring process, and the stirring is more uniform and efficient.
The foregoing description of the embodiments of the present invention further provides the objects, technical solutions and advantages of the present invention, and it should be understood that the foregoing description is only illustrative of the embodiments of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. The microcapsule preparation device for the self-healing concrete is characterized by comprising a capsule wall preparation module, a capsule core preparation module and a microcapsule forming module, wherein the capsule wall preparation module and the capsule core preparation module are respectively connected with the microcapsule forming module through pipelines;
The capsule wall preparation module comprises an ethyl cellulose raw material tank, a hydroxypropyl methyl cellulose raw material tank, an absolute ethyl alcohol raw material tank, a chitosan raw material tank, an acetic acid solution raw material tank, a stirring unit and a mixing unit, wherein the ethyl cellulose raw material tank, the hydroxypropyl methyl cellulose raw material tank and the absolute ethyl alcohol raw material tank are respectively connected with the stirring unit through pipelines, the chitosan raw material tank and the acetic acid solution raw material tank are respectively connected with the mixing unit through pipelines, the stirring unit is connected with the mixing unit through pipelines, the mixing unit conveys prepared capsule wall solution into the microcapsule forming module through pipelines, the microcapsule forming module comprises a shell (1), a spraying unit (2) and a drying unit (3), the shell (1) is a hollow cylinder, the spraying unit (2) is fixedly arranged at the upper end inside the shell (1), the drying unit (3) is fixedly arranged at the lower end inside the shell (1), the mixing unit is connected with the spraying unit (2) through pipelines, and a discharge hole is further formed in the shell (1);
The drying unit (3) comprises a hollow baffle (31), an air duct (32) and a fan (33), wherein the air duct (32) is a hollow cylinder without a cover and a bottom, the inner part of the wall of the air duct (32) is hollow, an air outlet is formed in the upper end of the inner wall of the air duct (32), the fan (33) is fixedly arranged on the side surface of the air duct (32) through a pipeline, the high-pressure air flow is forced into the wall of the air duct (32), and the hollow baffle (31) is fixedly arranged at the upper end of the air duct (32);
The section of the cylinder wall of the air cylinder (32) is shuttle-shaped, wherein the radius of one end of the section of the cylinder wall is smaller than the radius of the other end.
2. The microcapsule preparation device for self-healing concrete according to claim 1, wherein the shell (1) is a hollow cylinder without an upper bottom and a lower bottom, a mounting part for mounting the spraying unit (2) is arranged at the upper end of the shell (1), a mounting part for mounting the drying unit (3) is arranged at the lower end of the shell (1), wherein the spraying unit (2) comprises a liquid storage bottle (21), a nozzle (22) and a booster pump (23), one end of the booster pump (23) is fixedly arranged on the liquid storage bottle (21), the nozzle (22) is fixedly arranged at the other end of the booster pump (23), a mounting cover is arranged on the liquid storage bottle (21), the mounting cover is matched with the mounting part, and one end of the nozzle (22) is downwards arranged in the liquid storage bottle (21).
3. The microcapsule preparation device for self-healing concrete according to claim 1, wherein the distance between the cylinder walls at the air outlet is 0.05-0.5mm, and the upper surface of the hollowed-out baffle (31) and the lower plane of the air outlet are in the same horizontal plane.
4. The microcapsule preparation device for self-healing concrete according to claim 2, characterized in that the liquid storage bottle (21) comprises a bottle body (4), an automatic valve (5), a stirring device (6) and a preparation chamber (7), wherein the bottle body (4) is a hollow cylinder or a hollow cuboid, three feeding ports are arranged on a top plate of the bottle body (4) and are respectively connected with a chitosan raw material tank, an acetic acid solution raw material tank and a stirring unit through pipelines, an arc-shaped concave bottom plate is arranged at the bottom of the bottle body (4), the automatic valve (5) is fixedly arranged at the concave center of the bottom plate, the stirring device (6) is fixedly arranged on the inner side wall of the bottle body (4), at least two stirring devices (6) are arranged, the preparation chamber (7) is fixedly arranged outside the bottom of the bottle body (4), the preparation chamber (7) is a hollow cylinder or a hollow cuboid, and a booster pump (23) and a nozzle (22) are fixedly arranged at the bottom of the preparation chamber (7).
5. A microcapsule preparation device for self-healing concrete according to claim 4, characterized in that the stirring device (6) comprises a rotating shaft (8) and stirring rods (9), wherein the stirring rods (9) are fixed on the rotating shaft (8), the rotating shaft (8) is intersected with the axis of the stirring rods (9) and mutually perpendicular, and at least 12 stirring rods (9) are arranged on each rotating shaft (8) to realize the full mixing of microcapsule wall material solution.
6. The microcapsule preparation device for self-healing concrete according to claim 5, wherein the stirring rod (9) comprises a fixed rod (10), a rotating head and a miniature motor (12), wherein one end of the fixed rod (10) is fixedly arranged on the rotating shaft (8), the rotating head is fixedly arranged at the other end of the fixed rod (10), the machine body of the miniature motor (12) is fixedly arranged inside the fixed rod (10), and the rotating part of the miniature motor (12) is fixedly arranged in the rotating head, wherein the rotating head comprises a horizontal rotating head (13) and an inclined rotating head (11).
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