CN114837422A - Construction device and method for steel bar magnetic protection layer - Google Patents
Construction device and method for steel bar magnetic protection layer Download PDFInfo
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- CN114837422A CN114837422A CN202210543028.4A CN202210543028A CN114837422A CN 114837422 A CN114837422 A CN 114837422A CN 202210543028 A CN202210543028 A CN 202210543028A CN 114837422 A CN114837422 A CN 114837422A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 139
- 239000010959 steel Substances 0.000 title claims abstract description 139
- 238000010276 construction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 24
- 239000011241 protective layer Substances 0.000 claims abstract description 88
- 239000010410 layer Substances 0.000 claims abstract description 49
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 23
- 230000007797 corrosion Effects 0.000 claims abstract description 18
- 238000005260 corrosion Methods 0.000 claims abstract description 18
- 239000003822 epoxy resin Substances 0.000 claims description 35
- 229920000647 polyepoxide Polymers 0.000 claims description 35
- 238000001179 sorption measurement Methods 0.000 claims description 35
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
- 230000000694 effects Effects 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000006247 magnetic powder Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 9
- 230000008439 repair process Effects 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 230000005672 electromagnetic field Effects 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 230000001988 toxicity Effects 0.000 claims description 6
- 231100000419 toxicity Toxicity 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 claims description 4
- 230000005415 magnetization Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000003064 anti-oxidating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000010292 electrical insulation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/10—Devices for levelling, e.g. templates or boards
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/16—Electrodes characterised by the combination of the structure and the material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
- E04B1/642—Protecting metallic construction elements against corrosion
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Metallurgy (AREA)
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Abstract
The invention provides a construction device and a construction method of a steel bar magnetic protection layer, which comprises a steel bar, wherein the outer layer of the steel bar is provided with the magnetic protection layer; the end of the steel bar is provided with an electromagnet, the electromagnet is sequentially connected with a main switch, a sliding rheostat and an ammeter of the electromagnetic induction device in series in a circuit, and the main switch is used for controlling the circuit to be opened and closed at any time, so that the circuit can be controlled conveniently and the electromagnet can be recycled conveniently; the slide rheostat is used for controlling the current in the circuit, controlling the strength of a magnetic field and adsorbing steel bar protection layers with different thicknesses according to the actual requirement; the ammeter is used for displaying the current magnitude in the circuit, so that the current in the circuit is controlled through the sliding rheostat. According to the invention, the steel bars at the corresponding positions can be made to adsorb protective layers with different thicknesses by adopting magnetic forces with different sizes according to the crack generation difficulty, so that the controllability is strong; high strength, high corrosion resistance and no damage by external force.
Description
Technical Field
The invention belongs to the field of steel bar protection and repair, and particularly relates to a construction device and method for a steel bar magnetic protection layer. The method is suitable for the fields of special protective steel bars, damaged structure bare steel bars and the like.
Background
The protective layer of reinforcing bar has the important function in protection steel bar structural integrity, if the protective layer of reinforcing bar does not reach the realization protection effect, can lead to the reinforcing bar impaired and cause the house to collapse, the bridge topples, road sunken scheduling reality problem. Compared with the traditional steel bar protection layer, the steel bar protection layer has the following problems: firstly, the thickness is difficult to control, surface cracks are caused due to over-thick thickness, the protection effect is weakened, and the structural bearing capacity is reduced; the steel bar is exposed due to over-thin steel bar, so that the steel bar is corroded to cause structural damage. ② the strength is weaker, the corrosion resistance is poor, and the alloy is easy to be damaged or corroded by external force. And the construction operation difficulty is high, the influence of non-standard manual operation is easy to occur, and the protection effect is not ideal. Fourthly, the design function is single, the pertinence is weak, the applicability is low, and the condition of reinforcing steel bars with different damage degrees cannot be effectively targeted.
Disclosure of Invention
The invention aims to provide a construction device and a construction method of a magnetic protection layer of a steel bar, wherein the magnetic protection layer can be more attached to the steel bar under the action of magnetic attraction, so that the effect of tight wrapping is achieved, the porosity filling rate is improved, and the phenomenon that air and water enter and are corroded is avoided; according to the invention, the steel bars at the corresponding positions can be made to adsorb protective layers with different thicknesses by adopting magnetic forces with different sizes according to the crack generation difficulty, so that the controllability is strong; high strength, high corrosion resistance and no damage by external force.
In order to achieve the technical features, the invention is realized as follows: a construction device for a magnetic protection layer of a steel bar comprises the steel bar, wherein the magnetic protection layer is arranged on the outer layer of the steel bar; the end of the steel bar is provided with an electromagnet, the electromagnet is sequentially connected with a main switch, a sliding rheostat and an ammeter of the electromagnetic induction device in series in a circuit, and the main switch is used for controlling the circuit to be opened and closed at any time, so that the circuit can be controlled conveniently and the electromagnet can be recycled conveniently; the slide rheostat is used for controlling the current in the circuit, controlling the strength of a magnetic field and adsorbing steel bar protection layers with different thicknesses according to the actual requirement; the ammeter is used for displaying the current magnitude in the circuit, so that the current in the circuit is controlled through the sliding rheostat.
The steel bar is made of a common steel bar material, wherein a cobalt-nickel material is added in the steel bar material to enhance the magnetization effect of the steel bar, so that the magnetic field intensity is higher and the adsorption capacity is stronger.
The magnetic protective layer is prepared from oily epoxy resin, an oily epoxy resin curing agent and magnetic powder according to the proportion of 3:1: 4.
The oily epoxy resin is an organic high molecular polymer, has corrosion resistance, strong paint film adsorption force, heat resistance and electrical insulation, and provides stable physical and chemical properties for the reinforcing steel bar magnetic protective layer;
the oily epoxy resin curing agent is used for drying and curing the mixture of the oily epoxy resin and the magnetic powder.
The electromagnet consists of a tinned copper wire, a metal shell, a direct-current power supply and an alternating-current power supply, wherein the tinned copper wire is wound in the metal shell, the metal shell is hollow, and a steel bar is inserted into the metal shell and serves as an iron core of the electromagnet; the tinned copper wire is connected with a direct current power supply or an alternating current power supply for providing electric energy.
The tinned copper wire has the advantages of conductivity, high corrosion resistance and high oxidation resistance, the number of winding turns can be controlled according to the damage degree of the steel bar and the repair requirement, the tinned copper wire is pre-configured, and after the tinned copper wire is electrified, protective layers with different thicknesses are adsorbed according to specific conditions.
The direct current power supply provides current for the electromagnet and provides conditions for electromagnetic induction; meanwhile, the alternating current power supply and the direct current power supply are connected in parallel in the circuit to change the magnitude and the direction of current in the circuit, realize electromagnetic oscillation, reduce the porosity of the magnetic protective layer of the reinforcing steel bar and improve the strength of the protective layer;
the magnetic display meter and the magnetic field display are arranged on the outer wall and used for observing the magnetic force generated by the electromagnet and the change of the magnetic field.
The damaged steel bars are damaged by oxidation corrosion of the concrete body at the position easy to be damaged; the reserved lead interface is reserved for winding the tinned copper wire in advance for the reinforcing steel bar at the position easy to be damaged, and is reserved for standby application for providing current.
The construction method adopting the construction device of the steel bar magnetic protection layer adopts a method for prefabricating the steel bar magnetic protection layer based on a scene of protecting the steel bar, and comprises the following steps of:
step 1.1: according to experience accumulation of actual conditions, sleeving the electromagnet on the steel bar, and controlling the winding number of the tinned copper wire according to conditions to provide a lead for current transmission;
step 1.2: after the winding of the tinned copper wire is finished, reserving a wire interface at a preset position for standby application, performing anti-oxidation treatment on the reserved wire, and avoiding factors that the reserved wire is damaged;
step 1.3: oily epoxy resin, an oily epoxy resin curing agent and magnetic powder are prepared according to a certain proportion, so that the oily epoxy resin, the oily epoxy resin curing agent and the magnetic powder are mixed to form a magnetic protective layer, the magnetic protective layer is fully and uniformly stirred, rapid expansion and curing are avoided, a construction area and a non-construction area are separated in the preparation process, ventilation equipment is arranged in the construction area to ensure air circulation, and the danger caused by toxicity contained in the curing agent is avoided;
step 1.4: opening a main switch, opening the direct current power supply and closing the alternating current power supply; the generated current flows through the tinned copper wire to enable the reinforcing steel bar to generate an electromagnetic phenomenon, the magnetic protective layer is adsorbed by magnetic force, and due to the adsorption guiding effect of the magnetic adsorption end of the reinforcing steel bar, the magnetic protective layer can be guided and injected into cracks on the surface and in the reinforcing steel bar, and the backflow cannot occur due to gravity due to the adsorption effect;
step 1.5: in the process that the magnetic protective layer is adsorbed by the steel bar magnetic adsorption end, the current of the prefabricated magnetic adsorption end can be adjusted in real time through the slide rheostat to change the size of the electromagnetic field, and meanwhile, the switch of the magnetic display meter and the magnetic display is turned on to observe the size of the magnetic force and the change of the magnetic field generated by the steel bar magnetic adsorption end;
step 1.6: the direct current power supply is closed, the alternating current power supply is opened, the magnitude and the direction of current in the circuit are changed through the alternating current power supply, and electromagnetic oscillation is achieved, so that the porosity of the magnetic protective layer is reduced, bubbles are removed, and the crack attachment filling rate is improved;
step 1.7: and after the magnetic protective layer is sucked into the deep part of the gap of the steel bar and condensed with the surface to form a stable protective layer, treating the residual protective layer, disconnecting the main switch, disconnecting the reserved lead interface and recycling the electromagnetic induction device for the next use.
The method for constructing by adopting the construction device of the steel bar magnetic protection layer is based on the scene of repairing the easily damaged part of the steel bar, and adopts the method of reserving the easily damaged part of the lead, and comprises the following steps:
step 2.1: pre-winding a tinned copper wire on a part which is easy to damage on the surface of the steel bar, and presetting a reserved lead interface to reserve for providing current;
step 2.2: when the steel bar is put into use, the steel bar is corroded by external force along with the change of time to generate structural damage and steel bar corrosion, and when the steel bar is exposed outside, the electromagnetic induction device is connected with a lead;
step 2.3: preparing a required magnetic protective layer, preparing oily epoxy resin, an oily epoxy resin curing agent and magnetic powder according to a certain proportion, uniformly stirring to obtain the magnetic protective layer, separating a construction area from a non-construction area in the preparation process, and installing ventilation equipment in the construction area to ensure air circulation and avoid danger caused by toxicity contained in the curing agent;
step 2.4: turning on the main switch, turning on the direct current power supply and turning off the alternating current power supply; the generated current flows through the tinned copper wire to enable the reinforcing steel bar to generate an electromagnetic phenomenon, the magnetic protective layer is adsorbed by magnetic force, and due to the adsorption guiding effect of the magnetic adsorption end of the reinforcing steel bar, the magnetic protective layer can be guided and injected into cracks on the surface and in the reinforcing steel bar, and the backflow cannot occur due to gravity due to the adsorption effect;
step 2.5: the direct current power supply is closed, the alternating current power supply is opened, the magnitude and the direction of current in the circuit are changed through the alternating current power supply, and electromagnetic oscillation is achieved, so that the porosity of the magnetic protective layer is reduced, bubbles are removed, and the crack attachment filling rate is improved;
step 2.6: after the magnetic protective layer is sucked into the damaged key part of the steel bar and is condensed to form a stable protective layer, treating the residual protective layer, disconnecting the main switch, disconnecting the reserved lead interface and recycling the electromagnetic induction device for the next use;
step 2.7: after a steel bar magnetic protective layer is formed at the damaged part of the steel bar, traditional concrete pouring is carried out on the protective layer, the strength and the stability of the structure are further enhanced, and the effect of repairing the damaged steel bar structure is achieved.
The invention has the following beneficial effects:
1. the steel bar magnetic protective layer can be preset and repaired according to the actual damage degree. The effect of protection reinforcing bar is realized at the very first time, ensures that the reinforcing bar can not receive the secondary and damage, and then maintains whole building structure's stability. The invention can coat and brush protective layers with different thicknesses on the reinforcing steel bars according to different damage degrees of the reinforcing steel bars, has stronger adaptability and has pertinence. Compared with the traditional grouting repair method, the electromagnetic device used in the invention has the advantages of convenient operation, small plating brush gap, good air and water resistance, high accuracy in thickness control, and much higher usability than the traditional grouting method. When the problem that the brush protection layer plated on the common vertical/reverse-inclined steel bar flows out due to gravity is faced, the magnetic powder contained in the steel bar magnetic protection layer effectively solves the influence caused by gravity, and the brush protection layer can be effectively plated under electromagnetic induction to prevent falling off.
2. The invention has strong controllability, and can adjust the slide rheostat to change the current according to the actual requirement, namely the requirement of the thickness of the magnetic protective layer, and control the thickness of the magnetic protective layer.
3. Compared with the traditional steel bar, the novel steel bar containing the cobalt-nickel material is adopted, so that the magnetization effect is enhanced, the electromagnetic field intensity is higher, and the adsorption capacity is stronger.
4. The magnetic protective layer contains the oily epoxy resin material, has strong corrosion resistance, stable chemical property and long service life, and is not easy to react with the outside.
5. The invention adopts the electromagnetic induction principle to plate and brush the magnetic protective layer and adopts the electromagnetic oscillation method to improve the plating and brushing rate of the magnetic protective layer. Good compactness, small pores and good air and water resistance.
6. The method has strong pertinence, and can repair the gap in time when the damaged reinforcing steel bar is damaged by adopting the reserved lead at the vulnerable part of the reinforcing steel bar, protect the reinforcing steel bar and save the construction cost and time.
7. The invention can realize the anti-gravity type steel bar repairing, and overcomes the problem that the protective layer coated on the common vertical/anti-inclination steel bar flows out due to gravity.
8. The invention has the cyclicity, can repair the repeatedly damaged part of the steel bar for many times, and greatly reduces the cost in the long-term repair process because the manpower and material resources can be saved in each repair.
9. The method has the advantages of strong operability, flexibility, convenience and simple operation procedure, and can be suitable for various construction environments.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic diagram of a prefabricated steel bar protective layer of the present invention before manufacturing.
Fig. 2 is a schematic diagram of an electromagnet according to the present invention.
Fig. 3 is a schematic diagram of the steel bar cover electromagnet of the invention.
FIG. 4 is a schematic diagram of the fabrication of the protective layer of the prefabricated steel bar of the present invention.
FIG. 5 is a schematic view of a steel bar at a portion susceptible to damage according to the present invention.
Fig. 6 is a schematic view of repairing a damaged reinforcing bar according to the present invention.
In the figure: the steel bar-type magnetic protection device comprises a steel bar 1, a magnetic protection layer 2, oily epoxy resin 2.1, an oily epoxy resin curing agent 2.2, magnetic powder 2.3, an electromagnet 3, a tinned copper wire 3.1, a metal shell 3.2, a direct-current power supply 4, an alternating-current power supply 5, a damaged steel bar 6, a reserved lead interface 7, a main switch 8, a slide rheostat 9, an ammeter 10, a magnetic display meter 11, a magnetic field display 12 and a magnetic protection layer injection machine 13.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-6, a construction device for a magnetic protection layer of a steel bar comprises a steel bar 1, wherein a magnetic protection layer 2 is arranged on the outer layer of the steel bar 1; the end of the steel bar 1 is provided with an electromagnet 3, the electromagnet 3 is sequentially connected with a main switch 8, a sliding rheostat 9 and an ammeter 10 of an electromagnetic induction device in series in a circuit, and the main switch 8 is used for controlling the circuit to be opened and closed at any time, so that the circuit can be controlled conveniently and the electromagnet can be recovered conveniently; the slide rheostat 9 is used for controlling the current in the circuit, controlling the strength of a magnetic field and adsorbing steel bar protection layers with different thicknesses according to actual requirements; the ammeter 10 is used for displaying the current magnitude in the circuit, so as to control the current in the circuit through the sliding rheostat 9. By adopting the construction device, the magnetic protective layer can be more attached to the steel bar under the action of magnetic attraction, so that the effect of tight wrapping is achieved, the porosity filling rate is improved, and air and water are prevented from entering and rusting; according to the invention, the steel bars at the corresponding positions can be made to adsorb protective layers with different thicknesses by adopting magnetic forces with different sizes according to the crack generation difficulty, so that the controllability is strong; high strength, less damage caused by external force and high corrosion resistance.
Furthermore, the steel bar 1 is formed by adding cobalt-nickel materials into common steel bar materials to enhance the magnetization effect, so that the magnetic field intensity is higher and the adsorption capacity is stronger. Compared with the traditional steel bar, the magnetizing effect is enhanced, the electromagnetic field intensity is higher, and the adsorption capacity is stronger.
Further, the magnetic protective layer 2 is prepared from 2.1 parts of oily epoxy resin, 2.2 parts of an oily epoxy resin curing agent and 2.3 parts of magnetic powder according to the proportion of 3:1: 4. The magnetic protective layer contains oily epoxy resin materials, has strong corrosion resistance, stable chemical property and long service life, and is not easy to react with the outside.
Furthermore, the oily epoxy resin 2.1 is an organic high molecular polymer, has corrosion resistance, strong paint film adsorption force, heat resistance and electrical insulation, and provides stable physical and chemical properties for the reinforcing steel bar magnetic protective layer;
further, the oily epoxy resin curing agent 2.2 is used for drying and curing the mixture of the oily epoxy resin 2.1 and the magnetic powder 2.3.
Further, the electromagnet 3 is composed of a tinned copper wire 3.1, a metal shell 3.2, a direct current power supply 4 and an alternating current power supply 5, the tinned copper wire 3.1 is wound in the metal shell 3.2, the metal shell 3.2 is hollow, and the steel bar 1 is inserted into the metal shell and serves as an iron core of the electromagnet; the tinned copper wire 3.1 is connected to a dc power supply 4 or an ac power supply 5 for supplying electrical energy. 4. The invention adopts the electromagnetic induction principle to plate and brush the magnetic protective layer and adopts the electromagnetic oscillation method to improve the plating and brushing rate of the magnetic protective layer. Good compactness, small pores and good air and water resistance.
Furthermore, the tinned copper wire 3.1 has conductivity, strong corrosion resistance and oxidation resistance, can control the winding number according to the vulnerability degree and the repair requirement of the steel bar, is configured in advance, and absorbs protective layers with different thicknesses according to specific conditions after being electrified.
Further, the direct current power supply 4 supplies current to the electromagnet and provides conditions for electromagnetic induction; meanwhile, the alternating current power supply 5 and the direct current power supply 4 are connected in parallel in the circuit to change the magnitude and direction of current in the circuit, realize electromagnetic oscillation, reduce the porosity of the magnetic protective layer of the reinforcing steel bar and improve the strength of the protective layer; the magnetic display watch 11 and the magnetic field display 12 are arranged on the outer wall and used for observing the magnetic force generated by the electromagnet and the change of the magnetic field.
Further, the damaged steel bars 6 are damaged due to oxidation corrosion of the steel bars of the concrete body at the position easy to be damaged; the reserved lead interface 7 is a lead interface reserved for pre-winding tinned copper wires on the reinforcing steel bars at the position easy to damage and is reserved for standby application for providing current.
Example 2:
the magnetic field and magnetic force principle of the scene electromagnetic induction device based on the damaged position of the repaired steel bar comprises the following contents:
as shown in fig. 1, the steel bar at the easily damaged part of the steel bar is wound with an electromagnetic coil, and a conducting wire electrifying interface is reserved, the steel bar concrete body of the steel bar forms a 'large-scale' electromagnet, and according to the electromagnetic induction principle, the calculation formula of the magnetic induction intensity B generated by the direct current power supply is as follows:
in the formula: b is magnetic induction intensity with the unit of Wb/m 2 ；
Phi is induction magnetic flux, and the unit is Wb;
n is the number of turns of the excitation coil;
A e is the effective cross-sectional area of the electromagnet in m 2 。
According to the electromagnetic induction principle, the calculation formula of the electromagnet attraction force F is as follows:
in the formula: f is the electromagnet attraction force, and the unit is N;
b is magnetic induction intensity with the unit of Wb/m 2 ；
μ 0 Is vacuum permeability of 4 pi 10 -7 Wb/A·m；
S is the cross-sectional area of the electromagnet with the unit of m 2 。
Furthermore, due to the electromagnetic field generated by electromagnetic induction, the magnetic protective layer can be adsorbed under the action of the electromagnet attraction force, and the anti-gravity type steel bar repairing is realized. Direct current voltage of different sizes can be accessed according to the damaged degree of reinforcing bar to obtain the electromagnetic field of different sizes, obtain the electro-magnet suction of different sizes, and then adsorb the magnetic protection layer of different thickness.
Example 3:
the construction method adopting the construction device of the steel bar magnetic protection layer adopts a method for prefabricating the steel bar magnetic protection layer based on a scene of protecting the steel bar, and comprises the following steps of:
step 1.1: according to experience accumulation of actual conditions, the electromagnet 3 is sleeved on the steel bar 1, the winding number of the tinned copper wire 3.1 is controlled according to conditions, and a lead is provided for current transmission;
step 1.2: after the tinned copper wire 3.1 is wound, reserving a lead connector 7 at a preset position for standby, performing anti-oxidation treatment on the reserved lead, and avoiding factors that the reserved lead is damaged;
step 1.3: oily epoxy resin 2.1, an oily epoxy resin curing agent 2.2 and magnetic powder 2.3 are prepared according to a certain proportion, the oily epoxy resin curing agent and the magnetic powder are mixed to form a magnetic protective layer 2, the magnetic protective layer 2 is fully and uniformly stirred, rapid expansion and curing are avoided, a construction area and a non-construction area are separated in the preparation process, ventilation equipment is installed in the construction area to ensure air circulation and avoid danger caused by toxicity contained in the curing agent;
step 1.4: opening a main switch 8, opening the direct current power supply 4, and closing the alternating current power supply 5; the generated current flows through the tinned copper wire 3.1, so that the reinforcing steel bar 1 generates an electromagnetic phenomenon, the magnetic protective layer 2 is adsorbed by magnetic force, and due to the adsorption and guide effects of the magnetic adsorption end of the reinforcing steel bar, the magnetic protective layer 2 can be guided and injected into cracks on the surface and inside of the reinforcing steel bar, and the backflow cannot occur due to gravity due to the adsorption effect;
step 1.5: in the process that the magnetic protective layer is adsorbed by the steel bar magnetic adsorption end, the current of the prefabricated magnetic adsorption end can be adjusted in real time through the slide rheostat 9 to change the size of the electromagnetic field, and meanwhile, the switches of the magnetic display meter 11 and the magnetic field display 12 are turned on to observe the size of the magnetic force and the change of the magnetic field generated by the steel bar magnetic adsorption end;
step 1.6: the direct current power supply 4 is turned off, the alternating current power supply 5 is turned on, the magnitude and the direction of current in the circuit are changed through the alternating current power supply 5, and electromagnetic oscillation is achieved, so that the porosity of the magnetic protective layer is reduced, bubbles are eliminated, and the crack attachment filling rate is improved;
step 1.7: after the magnetic protection layer 2 is sucked into the deep part of the gap of the steel bar and condensed with the surface to form a stable protection layer, the protection layer residue is processed, the main switch 8 is switched off, and the reserved lead interface is switched off to recover the electromagnetic induction device for the next use.
Example 4:
the method for constructing by adopting the construction device of the steel bar magnetic protection layer is based on the scene of repairing the easily damaged part of the steel bar, and adopts the method of reserving the easily damaged part of the lead, and comprises the following steps:
step 2.1: pre-winding a tinned copper wire 3.1 at a position which is easy to damage on the surface of the steel bar, and presetting a reserved lead interface 7 for standby application in order to provide current;
step 2.2: when the steel bar is put into use, the steel bar is corroded by external force along with the change of time to generate structural damage and steel bar corrosion, and when the steel bar is exposed outside, the electromagnetic induction device is connected with a lead;
step 2.3: preparing a required magnetic protective layer 2, preparing oily epoxy resin 2.1, an oily epoxy resin curing agent 2.2 and magnetic powder 2.3 according to a certain proportion, uniformly stirring to obtain the magnetic protective layer, separating a construction area from a non-construction area in the preparation process, and installing ventilation equipment in the construction area to ensure air circulation and avoid danger caused by toxicity contained in the curing agent;
step 2.4: turning on the main switch, turning on the direct current power supply and turning off the alternating current power supply; the generated current flows through the tinned copper wire to enable the reinforcing steel bar to generate an electromagnetic phenomenon, the magnetic protective layer 2 is adsorbed by magnetic force, and due to the adsorption and guide effect of the magnetic adsorption end of the reinforcing steel bar, the magnetic protective layer can be guided and injected into cracks on the surface and inside of the reinforcing steel bar, and the backflow cannot occur due to gravity due to the adsorption effect;
step 2.5: the direct current power supply is closed, the alternating current power supply is opened, the magnitude and the direction of current in the circuit are changed through the alternating current power supply, and electromagnetic oscillation is achieved, so that the porosity of the magnetic protective layer is reduced, bubbles are removed, and the crack attachment filling rate is improved;
step 2.6: after the magnetic protective layer is sucked into the damaged key part of the steel bar and is condensed to form a stable protective layer, treating the residual protective layer, disconnecting the main switch, disconnecting the reserved lead interface and recycling the electromagnetic induction device for the next use;
step 2.7: after a steel bar magnetic protective layer is formed at the damaged part of the steel bar, traditional concrete pouring is carried out on the protective layer, the strength and the stability of the structure are further enhanced, and the effect of repairing the damaged steel bar structure is achieved.
Claims (10)
1. The utility model provides a construction equipment of reinforcing bar magnetic protection layer which characterized in that: the steel bar comprises a steel bar (1), wherein a magnetic protective layer (2) is arranged on the outer layer of the steel bar (1); the end of the steel bar (1) is provided with an electromagnet (3), the electromagnet (3) is sequentially connected with a main switch (8), a sliding rheostat (9) and an ammeter (10) of an electromagnetic induction device in series in a circuit, and the main switch (8) is used for controlling the circuit to be opened and closed at any time, so that the circuit can be controlled conveniently and the electromagnet can be recovered; the slide rheostat (9) is used for controlling the current in the circuit, controlling the strength of a magnetic field and adsorbing reinforcing steel bar protective layers with different thicknesses according to actual requirements; the ammeter (10) is used for displaying the current magnitude in the circuit, so that the current in the circuit is controlled through the sliding rheostat (9).
2. The construction equipment of the magnetic protection layer of the steel bar according to claim 1, characterized in that: the steel bar (1) is formed by adding cobalt-nickel materials into common steel bar materials to enhance the magnetization effect, and is higher in magnetic field intensity and stronger in adsorption capacity.
3. The construction device of the magnetic protection layer of the steel bar according to claim 1, characterized in that: the magnetic protective layer (2) is prepared from oily epoxy resin (2.1), an oily epoxy resin curing agent (2.2) and magnetic powder (2.3) according to the proportion of 3:1: 4.
4. The construction equipment of the magnetic protection layer of the steel bar according to claim 3, wherein: the oily epoxy resin (2.1) is an organic high molecular polymer, has corrosion resistance, strong paint film adsorption force, heat resistance and electrical insulation, and provides stable physical and chemical properties for the reinforcing steel bar magnetic protective layer;
the oily epoxy resin curing agent (2.2) is used for drying and curing the mixture of the oily epoxy resin (2.1) and the magnetic powder (2.3).
5. The construction equipment of the magnetic protection layer of the steel bar according to claim 1, characterized in that: the electromagnet (3) is composed of a tinned copper wire (3.1), a metal shell (3.2), a direct current power supply (4) and an alternating current power supply (5), the tinned copper wire (3.1) is wound in the metal shell (3.2), the metal shell (3.2) is hollow, and a steel bar (1) is inserted into the metal shell and serves as an iron core of the electromagnet; the tinned copper wire (3.1) is connected with a direct current power supply (4) or an alternating current power supply (5) for supplying electric energy.
6. The construction device of the magnetic protection layer of the steel bar according to claim 5, wherein: the tinned copper wire (3.1) has conductivity, strong corrosion resistance and oxidation resistance, can control the winding number according to the vulnerability of the steel bar and the repair requirement, is configured in advance, and adsorbs protective layers with different thicknesses according to specific conditions after being electrified.
7. The construction equipment of the magnetic protection layer of the steel bar according to claim 5, wherein: the direct current power supply (4) supplies current to the electromagnet and provides conditions for electromagnetic induction; meanwhile, the alternating current power supply (5) and the direct current power supply (4) are connected in parallel in the circuit to change the magnitude and direction of current in the circuit, realize electromagnetic oscillation, reduce the porosity of the magnetic protective layer of the reinforcing steel bar and improve the strength of the protective layer;
the magnetic display instrument also comprises a magnetic display meter (11) and a magnetic field display (12) which are arranged on the outer wall and are used for observing the size of the magnetic force generated by the electromagnet and the change of the magnetic field.
8. The construction equipment of the magnetic protection layer of the steel bar according to claim 1, characterized in that: the damaged steel bars (6) are the steel bars of the concrete body at the position easy to be damaged and are damaged due to oxidation corrosion; the reserved lead interface (7) is a lead interface reserved for pre-winding tinned copper wires on the reinforcing steel bars at the position easy to damage and is reserved for standby use for providing current.
9. The construction method by adopting the construction device for the magnetic protection layer of the steel bar as claimed in any one of claims 1 to 8, based on the scene of protecting the steel bar, the method for prefabricating the magnetic protection layer of the steel bar is adopted, and the construction method is characterized by comprising the following steps:
step 1.1: according to experience accumulation of actual conditions, the electromagnet (3) is sleeved on the steel bar (1), and the winding number of the tinned copper wire (3.1) is controlled according to conditions to provide a lead for current transmission;
step 1.2: after the tinned copper wire (3.1) is wound, reserving a wire connector (7) at a preset position for standby application, performing anti-oxidation treatment on the reserved wire, and avoiding the factor that the reserved wire is damaged;
step 1.3: oily epoxy resin (2.1), an oily epoxy resin curing agent (2.2) and magnetic powder (2.3) are configured according to a certain proportion, the oily epoxy resin curing agent and the magnetic powder are mixed to form a magnetic protective layer (2), the magnetic protective layer is fully and uniformly stirred, rapid expansion and curing are avoided, a construction area and a non-construction area are separated in the configuration process, ventilation equipment is installed in the construction area to ensure air circulation, and the danger caused by toxicity contained in the curing agent is avoided;
step 1.4: a main switch (8) is turned on, the direct current power supply (4) is turned on, and the alternating current power supply (5) is turned off; the generated current flows through the tinned copper wire (3.1), so that the reinforcing steel bar (1) generates an electromagnetic phenomenon, the magnetic protective layer (2) is adsorbed by magnetic force, and due to the adsorption and guide effects of the magnetic adsorption end of the reinforcing steel bar, the magnetic protective layer (2) can be guided and injected into cracks on the surface and inside of the reinforcing steel bar, and can not flow back due to gravity due to the adsorption effect;
step 1.5: in the process that the magnetic protective layer is adsorbed by the steel bar magnetic adsorption end, the current of the prefabricated magnetic adsorption end can be adjusted in real time through the slide rheostat (9) to change the size of the electromagnetic field, and meanwhile, switches of the magnetic display meter (11) and the magnetic field display (12) are turned on to observe the size of the magnetic force and the change of the magnetic field generated by the steel bar magnetic adsorption end;
step 1.6: the direct current power supply (4) is closed, the alternating current power supply (5) is opened, the magnitude and the direction of current in the circuit are changed through the alternating current power supply (5), and electromagnetic oscillation is achieved, so that the porosity of the magnetic protection layer is reduced, bubbles are eliminated, and the crack attachment filling rate is improved;
step 1.7: after the magnetic protection layer (2) is sucked into the deep part of the gap of the steel bar crack and condensed with the surface to form a stable protection layer, the protection layer residue is processed, the main switch (8) is switched off, and the reserved lead interface is switched off to recover the electromagnetic induction device for the next use.
10. The construction method by adopting the construction device for the magnetic protection layer of the steel bar as claimed in any one of claims 1 to 8, based on the scene of repairing the easily damaged part of the steel bar, the method for reserving the easily damaged part of the wire is adopted, and the method is characterized by comprising the following steps:
step 2.1: pre-winding a tinned copper wire (3.1) at a position which is easy to damage on the surface of the steel bar, and pre-arranging a reserved lead interface (7) for providing current for later use;
step 2.2: when the steel bar is put into use, the steel bar is corroded by external force along with the change of time to generate structural damage and steel bar corrosion, and when the steel bar is exposed outside, the electromagnetic induction device is connected with a lead;
step 2.3: preparing a required magnetic protective layer (2), preparing oily epoxy resin (2.1), an oily epoxy resin curing agent (2.2) and magnetic powder (2.3) according to a certain proportion, uniformly stirring to obtain the magnetic protective layer, separating a construction area from a non-construction area in the preparation process, and installing ventilation equipment in the construction area to ensure air circulation and avoid danger caused by toxicity contained in the curing agent;
step 2.4: turning on the main switch, turning on the direct current power supply and turning off the alternating current power supply; the generated current flows through the tinned copper wire to enable the reinforcing steel bar to generate an electromagnetic phenomenon, the magnetic protective layer (2) is adsorbed by magnetic force, and due to the adsorption and guide effects of the magnetic adsorption end of the reinforcing steel bar, the magnetic protective layer can be guided and injected into cracks on the surface and inside of the reinforcing steel bar, and the magnetic protective layer cannot flow back due to gravity due to the adsorption effect;
step 2.5: the direct current power supply is closed, the alternating current power supply is opened, the magnitude and the direction of current in the circuit are changed through the alternating current power supply, and electromagnetic oscillation is achieved, so that the porosity of the magnetic protective layer is reduced, bubbles are removed, and the crack attachment filling rate is improved;
step 2.6: after the magnetic protective layer is sucked into the damaged key part of the steel bar and is condensed to form a stable protective layer, treating the residual protective layer, disconnecting the main switch, disconnecting the reserved lead interface and recycling the electromagnetic induction device for the next use;
step 2.7: after a steel bar magnetic protective layer is formed at the damaged part of the steel bar, traditional concrete pouring is carried out on the protective layer, the strength and the stability of the structure are further enhanced, and the effect of repairing the damaged steel bar structure is achieved.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10258406A (en) * | 1997-03-19 | 1998-09-29 | Satoru Fukai | Concrete having property changeable by magnetism |
| CN101720361A (en) * | 2007-06-08 | 2010-06-02 | 丹尼尔和科菲森梅克尼齐有限公司 | Method and device for controlling the thickness of a coating on a flat metal product |
| CN104863369A (en) * | 2015-05-21 | 2015-08-26 | 浙江大学 | Magnetic vibrating method and device for concrete containing ferromagnetic aggregates |
| CN113250483A (en) * | 2021-05-12 | 2021-08-13 | 三峡大学 | Device and method for restoring building cracks in embedded and prefabricated magnetic attraction end guiding mode based on magnetic force |
-
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- 2022-05-18 CN CN202210543028.4A patent/CN114837422B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10258406A (en) * | 1997-03-19 | 1998-09-29 | Satoru Fukai | Concrete having property changeable by magnetism |
| CN101720361A (en) * | 2007-06-08 | 2010-06-02 | 丹尼尔和科菲森梅克尼齐有限公司 | Method and device for controlling the thickness of a coating on a flat metal product |
| CN104863369A (en) * | 2015-05-21 | 2015-08-26 | 浙江大学 | Magnetic vibrating method and device for concrete containing ferromagnetic aggregates |
| CN113250483A (en) * | 2021-05-12 | 2021-08-13 | 三峡大学 | Device and method for restoring building cracks in embedded and prefabricated magnetic attraction end guiding mode based on magnetic force |
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