CN203256332U - Control-free reinforced concrete structure cathode protection device - Google Patents
Control-free reinforced concrete structure cathode protection device Download PDFInfo
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- CN203256332U CN203256332U CN 201320190717 CN201320190717U CN203256332U CN 203256332 U CN203256332 U CN 203256332U CN 201320190717 CN201320190717 CN 201320190717 CN 201320190717 U CN201320190717 U CN 201320190717U CN 203256332 U CN203256332 U CN 203256332U
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Abstract
The utility model discloses a control-free reinforced concrete structure cathode protection device. The device comprises a reinforcing steel bar, a CFRP (carbon fiber reinforced plastics) sheet, and a direct-current power supply, wherein the reinforcing steel bar is implanted into concrete; the CFRP sheet is used as an auxiliary anode material of current; the direct-current power supply supplies electricity to the device; a tack coat for connecting the CFRP sheet and the concrete is arranged between the CFRP sheet and the concrete. The CFRP sheet is used as an auxiliary anode of the protection device, and the constant power supply capable of outputting enough current or voltage is also adopted, so that a control system and a check system in the traditional device are removed; the cost can be greatly reduced when an ideal protection effect is obtained.
Description
Technical field
The utility model relates to the impressed current cathodic protection field, relates in particular to a kind of skeleton construction protector that need not to control.
Background technology
Skeleton construction is topmost structure formation in the civil engineering work, along with the increase of working life and the variation of environment for use, deteriorated and the disabler of skeleton construction is comparatively general and serious, has caused the concern of scientific research scholar to the concrete structure durability problem.Concrete weather resistance refers to that concrete resists the effect of various destructive factors under actual service conditions, keeps for a long time the ability of intensity and outward appearance integrity.
From the angle of materialogy, the deteriorated main reason of reinforced concrete structure durability is the corrosion of inner reinforcing bar.Under normal circumstances, reinforcing bar is about in 13 the inside concrete hole solution at pH value and can forms passive film.But when the concrete that passes porous when the external corrosion medium entered into rebar surface, passive film was destroyed and is lost protection to reinforcing bar, thereby caused the corrosion of reinforcing bar.
At present, impressed current cathodic protection technology has been proved to be one of effective means.The impressed current cathodic protection technology is based on PH-potential ph diagram ph principle and puts forward, and thinks the reinforcing bar current potential to be dropped on exempt from the erosion district by apply cathodic current to reinforcing bar, and then reaches the purpose of protection reinforcing bar.Supplementary anode is the important component part of impressed current cathodic protection system, has played cathodic current is passed to concrete effect from external circuit.The process of delivered current is to discharge electronics by the electrochemical reaction that supplementary anode surface occurs to finish, and this requires, and supplementary anode must possess that polarization is little, current drainage large, difficult consumption and the characteristics of long term operation stable performance etc.Up to now, scientific research scholar's research and developed various supplementary anodes, such as the ferrosilicon anode, metallize layer anode, baried type anode and mixed metal oxide titanium anode etc.Wherein at present effect ideal what be most widely used is mixed metal oxide titanium anode, but its expensive price has limited its promotion and application greatly.
In addition, a complete skeleton construction impressed current cathodic protection system is mainly by reinforcing bar, supplementary anode, direct supply detection system and composition of the control system.Therefore wherein, the prime cost of system is distributed on supplementary anode and the Controlling System, wants the cost of control cathode protection, can develop in the configuration of suitable supplementary anode or improved system and start with.Wherein, suitable supplementary anode can be that the supplementary anode of main body is realized by research and development CFRP.
As the most common carbon fibre reinforced composite in structural strengthening field (CFRP) because having the advantages such as high-strength light, modulus are large, good corrosion resistance, become a kind of structural strengthening material of maturation.In fact, CFRP is except the mechanical property that people know, because one of its main component that contains-carbon fiber has good electrochemical properties, i.e. and good electroconductibility and near the electropotential of precious metal, CFRP has good electrochemical properties equally.Therefore, the applicant utilizes the electrochemical properties of CFRP to form the impressed current cathodic protection method that a kind of novel supplementary anode is applied to skeleton construction.
After structure is applied impressed current cathodic protection, need the etch state of reinforcing bar is detected according to traditional thinking, measure the electrochemical parameter of reinforcing bar, such as polarized potential, corrosion electric current density etc., and feed back to Controlling System.When the electrochemical parameter of reaction corrosion conditions of reinforcement did not meet the demands, Controlling System can be regulated voltage or the electric current output of direct supply, until guarantee that reinforcing bar all is subject to enough protections in the structure.This has determined that traditional impressed current cathodic protection needs expensive cost, and daily maintenance and operation expense.
Therefore, prior art remains to be further developed.
The utility model content
In view of above-mentioned the deficiencies in the prior art; the purpose of this utility model is to provide a kind of skeleton construction protector that need not to control; be intended to solve in the prior art carry out skeleton construction when carrying out impressed current cathodic protection because the cathodic protection system cost is expensive limited deficiency on causing using; a kind of skeleton construction impressed current catholic protection device that need not to control electrochemical parameter is provided; in the ideal effect that reaches the protection concrete structure, reduced cost.
The technical solution of the utility model is as follows:
A kind of device of the skeleton construction galvanic protection that need not to control, wherein, this device comprises:
Be used for being installed in the reinforcing bar in the concrete;
Be used for being installed in the concrete and as the CFRP sheet material of electric current auxiliary anode material,
An and direct supply of powering for described device;
Described CFRP sheet material is by concrete and described spacing of reinforcement setting;
The CFRP sheet material is connected with the positive pole of described direct supply, and described reinforcing bar is connected with the negative pole of described direct supply; And a side corresponding with described reinforcing bar is provided with the tack coat with conducting function on described CFRP sheet material; Described reinforcing bar links to each other with described tack coat by described concrete with described CFRP sheet material, and forms a loop line with described direct supply.
The device of the described skeleton construction galvanic protection that need not to control, wherein, the number of steel bars in the described concrete is at least 1, when the reinforcing bar number greater than 1 the time, be electrically connected between the reinforcing bar, and detect electrical connectivity between the reinforcing bar.
The device of the described skeleton construction galvanic protection that need not to control, wherein, described tack coat is cement paste or the epoxy resin glue that has added conductive particle.
Beneficial effect: the utility model provides a kind of skeleton construction cathodic protector that need not to control; described device adopts CFRP sheet material as supplementary anode; and export the stabilized power source of enough curtages and saved Controlling System and the check system in the conventional apparatus; not only can obtain desirable protection effect; the weather resistance of Effective Raise structure, and greatly controlled the cost of skeleton construction galvanic protection.
Description of drawings
Fig. 1 is the structural representation of a kind of skeleton construction cathodic protector that need not to control of the present utility model.
Fig. 2 is the cross-sectional structure synoptic diagram of a kind of skeleton construction cathodic protector that need not to control of the present utility model.
Fig. 3 is a kind of skeleton construction cathode protecting process most preferred embodiment flow chart of steps that need not to control of the present utility model.
Embodiment
The utility model provides a kind of skeleton construction cathodic protector that need not to control, and is clearer, clear and definite for making the purpose of this utility model, technical scheme and effect, below the utility model further described.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the utility model provides a kind of structural representation of the skeleton construction cathodic protector that need not to control, and as described in Figure 1, this device is comprised of following part:
The reinforcing bar 4 that described device is protected in advance, imbed described reinforcing bar concrete 3, be used for CFRP sheet material 1, a direct supply 5 of powering for described device as the electric current auxiliary anode material; Be provided with for the tack coat 2 that both are linked together between described CFRP sheet material 1 and the described concrete 3.
Reinforcing bar 4 is implanted in the concrete 3, and the device that the utility model provides is used for it is protected.Be provided with a CFRP sheet material 1 in the concrete middle and upper part, described CFRP sheet material 1 surface is adhesive with tack coat 2, and described tack coat 2 itself has enough intensity, and it links to each other CFRP sheet material 1 with concrete 3, can strengthen the integrally-built intensity of described device.
Described reinforcing bar 4 links to each other with anodal with the negative pole of a direct current power supply 5 respectively with described CFRP sheet material 1, and this direct supply 5 provides described protector required electric current.
Because described reinforcing bar is connected by described tack coat 2 with described CFRP sheet material 1, reinforcing bar 4 is connected with described direct supply 5 with described CFRP sheet material 1, and therefore last described reinforcing bar 4, described concrete 3, described tack coat 2 and described CFRP sheet material 1 and described direct supply 5 form a closed series loop and form a complete closed series loop.
Research finds that the carbon fibre reinforced composite (CFRP) that is widely used at present the structural strengthening field not only possesses good mechanical property; and electrically good as the carbon fiber guiding of main component; electropotential is near the electrochemical properties of precious metal; and described CFRP sheet material has electric action; be used for transmitting the cathodic current that this concrete structure is protected; CFRP also has corrosion-resistant advantage, has good resistibility for the electrochemical reaction product that produces on its surface.
Because the CFRP pattern is flexible; there is the cloth material that sheet material is also arranged; it can present different section forms; different shapes, different sites applicable to structure; in order to guarantee to transmit uniformly cathodic protection current as the CFRP of electric current auxiliary anode material; what can expect is; when specific embodiment, can use CFRP sheet material and CFRP cloth; this the best is implemented choice for use CFRP sheet material; and the CFRP material normally is tiled in the structural region that needs protection as supplementary anode; its area coverage is large, for the positive effect of being evenly distributed with of protective current.
In concrete the application, described tack coat need to satisfy and has conductivity and the high characteristic of intensity own, CFRP firmly can be fixed on concrete surface, such as the inorganic coagulation material take cement paste as representative or added the epoxy resin glue of the conductive particles such as powdered graphite.Preferably, in the utility model, use cement paste as tack coat, it is even glutinous mutually with the CFRP sheet surface, not only self has very high intensity, it with CFRP sheet material and concrete binding together, can improve the stability of whole concrete structure, thickness the best of described tack coat is about 3mm.
What can expect is, the utility model for skeleton construction be not limited only to as shown in Figure 1 rectangular beam structure, also can be used for the various skeleton construction shapes that the protection needs are arranged, such as concrete circular post etc.
Employed tack coat is cement paste in above-mentioned specific embodiment of the present utility model.
A kind of skeleton construction cathodic protector that need not to control that the utility model provides, this device comprise the reinforcing bar of protecting in advance, the concrete of imbedding described reinforcing bar, are used for CFRP sheet material, a direct supply of powering for described device as the electric current auxiliary anode material; Be provided with for the tack coat that both are linked together between described CFRP sheet material and the described concrete; This device is owing to adopt the CFRP sheet material as the supplementary anode of protector; can when obtaining desirable protection effect, greatly reduce cost; and because the tack coat itself that uses has preferably intensity; it is connected with concrete with the CFRP sheet material, has improved the firm of described protection constructional device.
Be illustrated in figure 2 as the cross-sectional structure synoptic diagram of a kind of skeleton construction cathodic protector that need not to control that the utility model provides; described reinforcing bar 4 is connected by described tack coat 2 with described CFRP sheet material 1. because in the application of reality; not just one of the number of steel bars that generally needs protection; as among Fig. 1 take the reinforcing bar number that needs protection as two as example; so when it is protected; to be electrically connected 7 between two reinforcing bars 4, and detect the electrical connectivity between the reinforcing bar.
As described in Figure 3, the utility model also provides a kind of method of the skeleton construction galvanic protection that need not to control, and concrete, the method may further comprise the steps:
S1, remove in the protection zone loose concrete, and in concrete, occur inserting the matrix material with conducting function in the zone in crack, form tack coat.
Loop in order to ensure last installation can be good at carrying out the transmission of cathodic protection current; therefore before installing; need to remove first concrete loose in the protection zone; the tack coat that can conduct electricity is inserted in the zone that the crack concrete occurred; make it to become continuous ionogen; so not only guaranteed the smooth circulation of loop current, and tack coat itself has very strong hardness, can well increase the steadiness of described current protective device.
S2, in concrete, implant the CFRP sheet material of impressed current auxiliary anode material, and with this CFRP sheet material and the setting of reinforcement in concrete interval.
In this step matrix material is covered on the surface of CFRP sheet material and the corresponding side of described reinforcing bar, be convenient to by concrete the cathodic current on the reinforcing bar is delivered on the CFRP sheet material.
S3, matrix material is covered on the described CFRP sheet surface of a corresponding side with reinforcing bar, and pressurizing binding layer firmly, make itself and CFRP sheet material and concrete binding together;
Bad for fear of contacting with the CFRP sheet surface because of tack coat, cause cathodic current can better not transmit smoothly or uniformly, therefore tack coat need to be pressurizeed makes its even thickness.
S4, reinforcing bar and CFRP sheet material are linked to each other with anodal with the negative pole of direct supply respectively, described reinforcing bar, concrete, CFRP sheet material and direct supply form the series loop of closure.
Reinforcing bar is connected with the negative pole of direct supply, and the CFRP sheet material is connected with the positive pole of direct supply.Because reinforcing bar links to each other with the tack coat of CFRP sheet material by concrete and conduction, therefore described reinforcing bar, concrete, CFRP sheet material and direct supply form closed series loop.
Described concrete is continuous ionogen, then should in time use cement paste to fill up if there is the crack, thereby cathodic protection current can be well transmitted in the complete loop of guaranteeing reinforcing bar-concrete-cement paste-CFRP sheet material composition.
The method of the impressed current cathodic protection that the utility model provides because adopt CFRP as supplementary anode, is used for reference the construction technology of CFRP ruggedized construction, with matrix material CFRP is bonded in concrete surface, need not main equipment, has the easy-to-install benefit.
Method and the device of a kind of skeleton construction galvanic protection that need not to control that the utility model provides; described device adopts CFRP sheet material as supplementary anode; and export the stabilized power source of enough curtages and saved Controlling System and the check system in the conventional apparatus; not only can obtain desirable protection effect; the weather resistance of Effective Raise structure, and greatly controlled the cost of skeleton construction galvanic protection.
Should be understood that; application of the present utility model is not limited to above-mentioned giving an example; for those of ordinary skills, can be improved according to the above description or conversion, all these improvement and conversion all should belong to the protection domain of the utility model claims.
Claims (3)
1. skeleton construction cathodic protector that need not to control is characterized in that this device comprises:
Be used for being installed in the reinforcing bar in the concrete;
Be used for being installed in the concrete and as the CFRP sheet material of electric current auxiliary anode material,
An and direct supply of powering for described device;
Described CFRP sheet material is by concrete and described spacing of reinforcement setting;
The CFRP sheet material is connected with the positive pole of described direct supply, and described reinforcing bar is connected with the negative pole of described direct supply; And a side corresponding with described reinforcing bar is provided with the tack coat with conducting function on described CFRP sheet material; Described reinforcing bar links to each other with described tack coat by described concrete with described CFRP sheet material, and forms a loop line with described direct supply.
2. the described skeleton construction cathodic protector that need not to control according to claim 1; it is characterized in that the number of steel bars in the described concrete is at least 1, when the reinforcing bar number greater than 1 the time; be electrically connected between the reinforcing bar, and the electrical connectivity between the detection reinforcing bar.
3. the described skeleton construction cathodic protector that need not to control according to claim 1 is characterized in that described tack coat is cement paste or the epoxy resin glue that has added conductive particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320190717 CN203256332U (en) | 2013-04-16 | 2013-04-16 | Control-free reinforced concrete structure cathode protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320190717 CN203256332U (en) | 2013-04-16 | 2013-04-16 | Control-free reinforced concrete structure cathode protection device |
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| Publication Number | Publication Date |
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| CN203256332U true CN203256332U (en) | 2013-10-30 |
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| CN 201320190717 Expired - Lifetime CN203256332U (en) | 2013-04-16 | 2013-04-16 | Control-free reinforced concrete structure cathode protection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831288A (en) * | 2015-04-30 | 2015-08-12 | 深圳大学 | Reinforced concrete protection method and system through combination of cathode protection and structure reinforcement |
| CN106119859A (en) * | 2016-08-10 | 2016-11-16 | 江苏溧阳建设集团有限公司 | A kind of protecting reinforced concrete cathode device |
-
2013
- 2013-04-16 CN CN 201320190717 patent/CN203256332U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831288A (en) * | 2015-04-30 | 2015-08-12 | 深圳大学 | Reinforced concrete protection method and system through combination of cathode protection and structure reinforcement |
| CN106119859A (en) * | 2016-08-10 | 2016-11-16 | 江苏溧阳建设集团有限公司 | A kind of protecting reinforced concrete cathode device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |
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| CX01 | Expiry of patent term |