CN207313710U - A kind of long service life reference electrode suitable for cathodic protection - Google Patents

Abstract

A kind of long service life reference electrode suitable for cathodic protection that the utility model is related to, including ceramic tank body (1), helical form copper wire (4), the leader cable (7) being connected with helical form copper wire, it is characterised in that：The outer surface of the ceramic tank body (1) is in addition to a round no glaze area (3) is left, the outer exterior portion of remaining tank body is coated with a floor packaging ceramic glaze layer (2)；The chamber of the ceramics tank body is divided into the lower chambers (11) for setting helical form copper wire (4) through an intermediate isolating plate (5) and top cover labyrinth (6), and the upper chamber (10) being connected through a connector (9) with leader cable (7), the bottom chamber fill copper sulfate crystal filler (12).

Description

A kind of long service life reference electrode suitable for cathodic protection

Technical field

It the utility model is related to oil-gas pipeline and corrode monitoring technology field online, in particular for cathodic protection remote monitoring And a kind of long service life reference electrode developed, belong to underground utilities electrochemical cathode protection technique field.

Background technology

Cathodic protection is the method for effectively preventing buried metal pipeline from corroding, and has been widely used in oil-gas pipeline at present In.The deficiency of oil-gas pipeline cathodic protection professional testing staff is engaged in for China, the technical merit of assigned personnel is even more the good and the bad It is uneven, and the oil-gas pipeline that puts into operation is created every year in ever-increasing outstanding problem, with internet and mechanics of communication Rapid development, cathodic protection to oil-gas pipeline implements online remote monitoring and has become a kind of trend.

Reference electrode is one of part important in cathodic protection remote monitoring system, is mainly used for buried oil gas Pipeline natural potential, the data determination of pipe to soil potential and polarization potential and collection, the letter automatically controlled but also as potentiostat Number source, it weighs the size that cathodic protection system is played a role, it may also be said to corrodes the differentiation of situation outside oil-gas pipeline very It is that foundation is drawn a conclusion relative to reference electrode test data in big degree.

The copper of the reference electrode generally use long-life of the remote monitoring of buried pipeline cathodic protection at present/copper sulphate reference electricity Pole, but the technology performance of copper of existing long-life/copper sulfate reference electrode, can not meet that cathodic protection remote online is supervised at all Control system is to its basic demand in terms of long lifespan, performance stabilization and cost-effective three.

Although manufacture in the art and use unit are provided with service life length, stability for solution since these years Many new explorations have been done with cost-effective buried type copper/cupric sulfate reference electrode,

Chinese patent literature, which discloses, much to be carried out buried type copper/cupric sulfate reference electrode to innovate improved technical side Case.For example Publication No. CN2116970U《Long-life buried copper, copper sulfate reference electrode》, notification number be CN100397710C's《Copper/copper/saturated copper sulphate gel reference electrode》, notification number be CN202110160U《Long-effect copper sulfate is joined Compare electrode》, and notification number is CN106610398A's《Buried resistance to compression antiseepage, anti-dragging type long-life copper/copper sulphate are joined Compare electrode》.

It is therein《Long-life buried copper, copper sulfate reference electrode》For existing long-life copper/copper sulphate the most conventional Reference electrode product, this copper/copper/saturated copper sulphate reference electrode be by biscuit ware tank be equipped with copper (tubulose or spring) and Copper sulfate crystal is formed.Since biscuit ware tank is in porosity good penetrability itself, and the whole biscuiting pottery contacted with soil With soil environment ion exchange (tank body infiltrating area is big) can occur for porcelain jar outer surface, so as to cause copper sulphate in tank brilliant Body is lost in too fast problem, causes this reference electrode at all less than life expectancy requirement；In addition porosity biscuit ware tank surface Large area is exposed in the soil, and the pollution for also resulting in solution in various ion pair tanks in soil media is accelerated, so as to influence to join Stability and reduction of service life than electrode performance；Again, this reference electrode for reach projected life increase it is internal Copper sulfate crystal dose is to extend loss elapsed time, so volume is bigger (regular size 95 × 200mm of Φ, cylinder), Manufacture added cost is not only caused, but also the anti-pressure ability of its big tank body of volume weakens also not readily transportable installation.

To sum up analysis shows：Above-mentioned published reference electrode cathodic protection remote on-line monitoring system in use, In terms of three stable and cost-effective basic demands of long life requirement, performance to reference electrode, it is difficult to make there are some The place of people's satisfaction.

Above-mentioned three parts of open source literatures, in addition to having some differences in some structures, in order to reach its long-life and performance Stable expected requirement, has mainly carried out some improvement in the manufacturing process of reference electrode.Such as：《Long-effect copper sulfate is joined Compare electrode》, the technology using epoxy resin layer by biscuit ware top tank structure part seal, make copper sulfate crystal only at ceramic pot bottom Portion or the infiltration of side wall very small part, greatly reduce the seepage velocity of copper sulfate crystal while also significantly slow down soil media Pollution of the intermediate ion to solution in tank, so as to reach long-life and stability requirement.Again for example《Copper/copper/saturated copper sulphate coagulates Glue reference electrode》, which proposes a kind of reference electrode of new structure composition, which is double layers of tank body knot Structure, internal layer are electrode body, and outer layer is gel electrolyte, and gel electrolyte mass-energy effectively mitigates dirt of the outer ion to electrode body Dye acts on, and reduces the infiltration bleed rate of internal copper ion, so as to reach long-life and stability requirement.In addition,《It is buried With resistance to compression antiseepage, anti-dragging type long-life copper/copper sulfate reference electrode》, the technology using a kind of dual chamber structure (oversheath, Inner sheath and ceramic tank body) reference electrode, its inner sheath is located at the inside of oversheath, and is coaxially disposed with oversheath, the interior shield One end undergauge of set, ceramic tank body are embedded in the periphery at inner sheath undergauge, the bottom of ceramic tank body is exposed at external rings In the medium of border, so reduce copper sulphate ion stream stall degree, lift the stability of reference electrode service life and performance, simultaneously because The cavity in cavity and inner sheath in its wiring gland packing box also improves the impervious of reference electrode cable lead-out end termination Ability drags performance with anticreep.

But according to understanding of the utility model people to above-mentioned three kinds of public technologies, find above-mentioned three kinds of technical solutions In the presence of shortcoming once：

First, it is exactly that they add other making materials and production technology link, makes product manufacturing process complicated So as to which production efficiency reduces, so cost of manufacture greatly increases, and it is unreasonable with respect to cost performance.Especially above-mentioned the third patent production Product, though its various aspects of performance is optimal, its manufacture craft is the most complicated, consumptive material is most, and manufacture cost is approximately traditional reference More than 2 times of electrode.

In addition, first two product also has many shortcomings：

1st, biscuit ware jar structure brittleness is big, pressure-bearing force difference；

2nd, reference electrode cable and the joint sealed insulation of copper coil in tank or copper rod are simple, joint may be caused to send out Raw infiltration short circuit problem, so that the distortion of reference electrode test potential or failure.3rd, reference electrode cable lead-out end termination Anticreep is dragged can force difference.

Therefore, research and development one kind comply fully with cathodic protection remote on-line monitoring system requirements (long-life is long, performance is stable and And it is cost-effective) new reference electrode just become corresponding industry technical research.

Utility model content

The purpose of this utility model：It is intended to be to overcome shortcoming existing in the prior art, reduces improving cost, it is practical new A kind of long lifespan of type, performance be stable, copper that is cost-effective and being more suitable for cathodic protection remote online monitoring system/copper sulphate ginseng Compare electrode.

This long service life reference electrode suitable for cathodic protection, including ceramic tank body, helical form copper wire and helical form The leader cable of copper wire connection, it is characterised in that：The outer surface of the ceramic pot is in addition to a round no glaze area is left, remaining The outer exterior portion of tank body is coated with one layer of packaging ceramic glaze layer；The chamber of the ceramics tank body is through an intermediate isolating plate and top cover labyrinth The lower chambers that helical form copper wire is set, and the upper chamber being connected through a connector with leader cable are divided into, under described Copper sulfate crystal filler is filled in chamber.

The round no glaze area be diameter 20mm border circular areas, distance of center circle tank bottom 35mm.

The volume of lower chambers of the upper chamber that the intermediate isolating plate is divided into filling copper sulfate crystal filler is big Small ratio is 2:5；Circular bulkheads setting position is about in chamber below tank mouth at 45mm.

The material density of the ceramic tank body：2.3g/cm³, water absorption rate：20%th, air penetrability：45%th, moisture expantion： 6m/m.k, terrine wall thickness：5mm, envelope glaze thickness：0.2mm, key dimension：The cylinder of Φ 50mm × 150mm.

This long service life reference electrode for cathodic protection proposed according to above technical scheme, with existing same work( Energy reference electrode compares, and has the following advantages：

1st, relative to existing copper/whole outer surface of copper sulfate reference electrode ceramics tank body exchanged with soil environment from The effect (tank body infiltrating area is big) of son, so as to cause copper sulfate crystal filler in tank to be lost in too fast problem, also results in soil Pollution of the medium intermediate ion to solution in tank is accelerated, so as to influence stability and the reduction of service life of reference electrode performance；This Utility model carries out envelope glaze in the reference electrode ceramics tank outer surface overwhelming majority, only stays one at tank wall bottom position one First coin-size is exchanged without Feng You areas with extraneous soil media intermediate ion, thus greatly reduces the seepage velocity of copper sulfate crystal With mitigating contamination of the outer ion to electrode body, so as to greatly improve service life and the stability of reference electrode, adopt The reference electrode service life with the making of the utility model is about 3~5 times of traditional reference electrode.

2nd, relative to existing copper/copper sulfate reference electrode more using single cavity design, reference electrode leader cable with it is spiral The connector of copper wire does not have good sealed insulation measure, may cause joint that infiltration short circuit problem occurs, so that reference is electric Pole test potential distortion or failure.The connector of reference electrode leader cable and copper helices is individually placed in one by the utility model A chamber, and epoxy electron pouring sealant is filled with the chamber, prevent foreign ion in soil environment and pass through moisture content edge electricity Infiltration is flowed into reference electrode and pollutes at cable joint, increase impermeability improve reference electrode stability with it is accurate Property.

3rd, the utility model design devises water-proof cable fastener head, reference electrode leader cable in reference electrode exit Tension, prevent that dragging de- performance improves.

4th, existing copper/copper sulfate reference electrode ceramics tank body is single biscuit ware tank, and volume is also big, compressive property Difference, the tank body small volume of the utility model, then add tank body outer surface to carry out envelope glaze (consistency, the crushing resistance of glaze layer are long-range In biscuit ware body), significantly improve its entire compression intensity.The smooth exquisiteness of tank surface of this covering glaze is very beautiful.

5th, the utility model realizes its long-life by easy and effective and of low cost technological means, performance is stablized Effect, does not increase the production technology link and other consumables costs of reference electrode manufacturer, cost-effective, easy to large area Promote and apply.

Brief description of the drawings

Fig. 1 is the main body appearance diagram of the utility model；

Fig. 2 is the body interior structure diagram of the utility model；

Fig. 3 is the utility model long term monitoring result of the test schematic diagram；

Fig. 4 is this reference electrode copper sulphate bleed rate lab diagram；

Fig. 5 is conventional reference electrode copper sulphate bleed rate lab diagram.

In figure：1- ceramics tank body 2- glaze layers 3- are without Feng You areas 4- helical form copper wire 5- intermediate isolating plate 6- sealing covers 7- leader cable 8- water-proof cable fastener head 9- connector 10- upper chamber 11- lower chambers 12- copper sulfate crystal fillers.

Embodiment

The utility model is expanded on further below in conjunction with Figure of description, and provides the embodiment of the utility model.

This long service life reference electrode suitable for cathodic protection as shown in Figure 1 and Figure 2, it is to generally fitting at present The inventive improvements of reference electrode.

This long service life reference electrode suitable for cathodic protection, including ceramic tank body 1, helical form copper wire 4, with it is spiral The leader cable 7 of shape copper wire connection, it is characterised in that：Remove and leave a round no glaze area 3 in the outer surface of the ceramic tank body 1 Outside, the outer exterior portion of remaining tank body is coated with one layer of packaging ceramic glaze layer 2；The chamber of the ceramics tank body is through an intermediate isolating plate 5 and top cover labyrinth 6 be divided into the lower chambers 11 that helical form copper wire 4 is set, and be connected through a connector 9 with leader cable 7 Upper chamber 10, the bottom chamber fills copper sulfate crystal condiment 12.

The utility model reference electrode technological core is biscuit ware potting glaze, in the ceramic tank outer surface overwhelming majority Envelope glaze is carried out, only being left in tank wall bottom position at one circular (one yuan of coin-size) without Feng You areas, makes copper sulfate crystal It cannot be permeated, be only capable of by the narrow and small no Feng You areas infiltration of tank body side bottom and extraneous soil media intermediate ion by Feng You areas Exchange, the round no glaze area 3 is arranged to the border circular areas of diameter 20mm, distance of center circle tank bottom 35mm；So that not only significantly The seepage velocity of copper sulfate crystal is reduced, while also mitigates contamination of the outer ion to electrode body；And the tank of envelope glaze Body compression strength also greatly improves.

In addition, following two technical measures are taken in practical applications：

1st, the middle interval upper chamber 10 that is divided into of intermediate plate 5 and the lower chambers 11 that fill copper sulfate crystal filler Volume size ratio is 2:5, the middle interval intermediate plate 5 setting position is about in chamber under tank mouth at 45mm.To reference electrode The connector of leader cable and tank inside spin copper wire done sealing, insulate and anticreep drags processing, impervious, anticreep performance is more excellent. No matter biscuit ware tank or sealing glaze ceramic pot is directly provided by ceramic producer, reference electrode manufacturer will not be increased Production technology link and other consumables costs.

2nd, 150kg copper sulfate crystals are stored in the lower chambers 11, and be filled in around helical form copper wire 4, at the same time 50ml distilled water is added in copper sulfate crystal filler, copper sulphate is maintained crystalline state.

In order to ensure the utility model proposes this long service life reference electrode ceramic body suitable for cathodic protection Physical property, design of the utility model to ceramic tube body has carried claimed below：

The material density of the ceramics tank body 1：2.3g/cm³, water absorption rate：20%th, air penetrability：45%th, moisture expantion：6m/ M.k, terrine wall thickness：5mm, envelope glaze thickness：0.2mm, key dimension：The cylinder of Φ 50mm × 150mm.

Using the ceramic tank body of above-mentioned technical indicator, the envelope glaze ceramic pot volume of the utility model is the conventional biscuiting pottery of tradition The 1/5 of porcelain jar volume, ceramics envelope glaze handicraft is simple ripe universal in addition, and the cost of the envelope glaze ceramic pot of design is made pottery than conventional biscuiting Porcelain jar cost is also low, and since the envelope glaze ceramic pot of design is small very much, copper sulfate crystal dosage is installed additional greatly in tank Reduce, consumables cost is considerably reduced, so as to reach a high cost performance.

Helical form copper wire 4 described in the utility model, copper purity are not less than 99.7%, use section as 4mm²Copper Silk processing and fabricating, every section of intercepted length 350mm, it is 10mm to be processed into internal diameter by Wiring apparatus, and 8 circle spiral coils are a length of The screw pile copper wire of 125mm.

Reference electrode lead 7 is crimped with the jointing 9 of copper helices 4 using copper pipe in the utility model, copper pipe specification： Internal diameter 4mm, outside diameter 4.5mm long 1.2cm.

Copper sulfate crystal is using the Salzburg vitriol (II) for analyzing pure AR, molecular formula CuSO4 in the utility model 5H2O, relative molecular mass 249.69, containing (CuSO45H2O), % is more than 99%.

Attached drawing 3 lists test index of this long service life reference electrode suitable for cathodic protection in laboratory.

As shown in Figure 3 in laboratory, by the utility model proposes reference electrode and calibration reference electrode (standard hydrogen The performance that electrode calibration is crossed stablizes accurate copper/copper sulfate reference electrode) it is placed in test same root iron pipe in same soil environment Potential change, the potential datas of two reference electrodes and iron pipe is carried out at the same time using cathodic protection intelligence potential acquisition equipment Collection, gathers a potential data and is uploaded to data software management platform, potential test collection period is 7 months, is passed through daily The result of the test of software management platform long term monitoring essentially coincides for both potential data variation tendencies, and error is substantially in scholar 5mV It is interior, meet theoretical value, illustrate the utility model proposes reference electrode there is good potential stability.

Fig. 4 and Fig. 5 is that the utility model reference electrode is tested with existing conventional reference electrode copper sulphate bleed rate respectively Comparing result.

Conventional reference electrode and the utility model reference electrode are placed in same moist damp soil environment and carry out week The operation test of 1 year phase, test reference electrode inside copper sulfate crystal bleed rate, conventional reference electrode (see Fig. 5) is by using Preceding 1500g (the copper sulphate dosage of dressing is very big in conventional products ceramic pot), residual sulfuric acid weight of copper is after experiment in 1 year 550g, copper sulphate bleed rate is up to 63%, and the utility model reference electrode (see Fig. 4) uses preceding 150g (the utility model The copper sulphate dosage of dressing in product ceramic tank comparatively very little), residual sulfuric acid weight of copper is 145g after experiment in 1 year, sulphur Sour copper bleed rate is only 3.3%.Obviously show：The utility model proposes the reference electrode sulphur suitable for cathodic protection Sour copper crystal bleed rate is far below conventional reference electrode, and the reference electrode service life is obviously improved, it is contemplated that the service life in 20~30 years (no It is different with using the soil environment service life).

In addition, being shown by compressive property result of the test, the new reference electrode compressive property of research and development reaches 55.5kN, often The reference electrode performance of rule is 1.05kN, and new reference electrode compressive property is lifted compared to the compressive property of existing conventional products 55 times, compressive property greatly promotes.

It the above is only the applicant according to technical side to the basic intention of design principle and concrete structure of the utility model Generality illustrates, does not represent the whole of the utility model.It is every not have substance according to what this design fundamentals proposed The improvement of innovation be regarded as it is similar with the utility model, belong to the utility model protection category.

Claims (5)

1. a kind of long service life reference electrode suitable for cathodic protection, including ceramic tank body (1), helical form copper wire (4) and spiral shell Revolve the leader cable (7) of shape copper wire connection, it is characterised in that：Remove and leave a round nothing in the outer surface of the ceramic tank body (1) Exterior portion is coated with a floor packaging ceramic glaze layer (2) outside, outside remaining tank body in glaze area (3)；The chamber of the ceramics tank body is through one Intermediate isolating plate (5) and top cover labyrinth (6) are divided into the lower chambers (11) for setting helical form copper wire (4), and through a connection The upper chamber (10) that head (9) is connected with leader cable (7), the bottom chamber fill copper sulfate crystal filler (12).

A kind of 2. long service life reference electrode suitable for cathodic protection as claimed in claim 1, it is characterised in that：Described Round no glaze area (3) is without the border circular areas that Feng You areas are diameter 20mm, distance of center circle tank bottom 35mm.

A kind of 3. long service life reference electrode suitable for cathodic protection as claimed in claim 1, it is characterised in that：Described The volume size ratio of lower chambers (11) of the upper chamber (10) that intermediate isolating plate (5) is divided into filling copper sulfate crystal is 2: 5, the intermediate isolating plate (5) setting position is about in chamber below tank mouth at 45mm.

A kind of 4. long service life reference electrode suitable for cathodic protection as claimed in claim 1, it is characterised in that：Described Lower chambers (11) store 150kg copper sulfate crystals, and are filled in around helical form copper wire (4), while in copper sulfate crystal 50ml distilled water is added, copper sulphate is maintained crystalline state.

A kind of 5. long service life reference electrode suitable for cathodic protection as claimed in claim 1, it is characterised in that：The pottery The material density of porcelain jar body (1)：2.3g/cm³, water absorption rate：20%th, air penetrability：45%th, moisture expantion：6m/m.k, terrine wall It is thick：5mm, envelope glaze thickness：0.2mm, key dimension：The cylinder of Φ 50mm × 150mm.