CN101376982A - Probe for monitoring sacrificial anode current output and manufacturing method thereof - Google Patents
Probe for monitoring sacrificial anode current output and manufacturing method thereof Download PDFInfo
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- CN101376982A CN101376982A CNA2008102227851A CN200810222785A CN101376982A CN 101376982 A CN101376982 A CN 101376982A CN A2008102227851 A CNA2008102227851 A CN A2008102227851A CN 200810222785 A CN200810222785 A CN 200810222785A CN 101376982 A CN101376982 A CN 101376982A
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Abstract
The invention relates to a sacrifice anode generated current monitoring probe and a preparation method thereof. The probe comprises the following components: a sacrifice anode supporting leg (1), a Hall sensor component, a watertight cable (5), a filler material (6), an insulating packaging shell (7) and a magnetic shielding outer protective cover (8); the Hall sensor component consists of a Hall sensor (2), a guide magnetic ring (3) and a Hall sensor circuit (4); the guide magnetic ring is arranged on the sacrifice anode supporting leg; the Hall sensor is arranged in an opening of the guide magnetic ring; the Hall sensor circuit is electrically connected with the Hall sensor; the Hall sensor component is packaged in the insulating packaging shell; the insulating packaging shell is arranged on the sacrifice anode supporting leg; the magnetic shielding outer protective cover is wrapped outside the insulating packaging shell; one end of the watertight cable is electrically connected with the Hall sensor circuit, and the other end extends outside the magnetic shielding outer cover; apart from the Hall sensor component, a sealing cavity is filled with the filler material. The probe measures the current generated by the sacrifice anode in a non-intrusive way, and even if the probe fails to work, the normal work of the sacrifice anode is not affected.
Description
Technical field
The present invention relates to a kind of probe for monitoring sacrificial anode current output and preparation method thereof.
Background technology
In order to protect steel structure corrosion in ocean environment to destroy, utilize sacrificial anode that submerged zone and ooze district steel construction (being negative electrode) are carried out the galvanic protection (see figure 1) usually.Because structure formation and envrionment conditions are very big to the corrosion behavior influence of material; particularly for the sea area newly developed that lacks the corrosion measured data; existing galvanic anode protection standard and practical situation often have certain discrepancy, cause the defective in the cathodic protection system design.For verify and check cathodic Protection Design whether rationally, whether working order normal; present stage, effective technical means was that current probe is installed on the sacrificial anode leg; generation electric current to sacrificial anode is monitored; can be so that understand sacrificial anode at initial polarization, keep and the three phases in latter stage, reach the protective current density of design code.
In existing offshore platform cathodic protection monitoring system, monitoring device all adopts splitter (standard resistance) method to measure current of galvanic method, promptly tries to achieve current of galvanic method by the flow through volts lost of standard resistance of measurement.Owing to must make the sacrificial anode working current splitter of all flowing through when measuring; could record current of galvanic method exactly; must at first cut off the (see figure 2) that is electrically connected between sacrificial anode and the protected steel construction (negative electrode) during installation; current of galvanic method is inserted current monitoring probe 13 earlier; flow through the probe in splitter after; flow into the protected body (see figure 3) as negative electrode again, anticathode is implemented corrosionproof protection.The sacrificial anode of ocean steel construction (being negative electrode) all is by being welded on the steel construction with the anode leg of structure with material; in order to cut off being electrically connected between sacrificial anode and the protected steel construction (being negative electrode); the steel construction anode leg that must respectively the sacrificial anode two ends be connected with jacket cuts off from the centre; weld isolated flange again at the anode legs break face two ends of blocking; utilize isolated flange that the anode leg that blocks is continued, sacrificial anode is seated on the protected steel construction again.The line of current probe is connected respectively to the two ends of isolated flange, after protective current being flowed through be connected across the current probe of isolated flange, enters protected body again, implements protection.Above-mentioned insertion type measuring method has the defective of following two aspects:
1) owing to is to be connected in series between sacrificial anode, current probe and the negative electrode; the current of galvanic method current probe of must flowing through earlier just can enter protected body; in case current probe damages; when particularly being exposed to the probe cable generation fracture in the seawater; directly cause the electrical connection between sacrificial anode and the protected structure to open circuit; make sacrificial anode implement protection, cause designed cathodic protection system to lose efficacy, thereby reduce the structure Design life-span protected structure.
2) cutting anode leg utilizes isolated flange antianode leg to implement to connect, and has directly destroyed the sacrificial anode one-piece construction, has reduced the structural strength of sacrificial anode itself.
Summary of the invention
The purpose of this invention is to provide a kind of probe for monitoring sacrificial anode current output and preparation method thereof.
For achieving the above object, the present invention can be by the following technical solutions: probe for monitoring sacrificial anode current output 14 is characterized in that: probe comprises following assembly: hall sensor component, watertight cable 5, packing material 6, insulation-encapsulated housing 7 and magnetic shielding oversheath 8; Described hall sensor component is made up of Hall element 2, magnetic guiding loop 3 and Hall element circuit 4;
Magnetic guiding loop 3 is the ring bodies with an opening, and Hall element 2 is located in the opening of magnetic guiding loop, and Hall element circuit 4 is electrically connected with Hall element 2; Be regardless of the magnetic shielding oversheath 8 of stream by sacrificial anode supporting leg electric current and be coated on outside the insulation-encapsulated housing 7, hall sensor component is located in the insulation-encapsulated housing 7; Watertight cable 5 one ends are electrically connected with described Hall element circuit 4, and the other end stretches out described magnetic shielding oversheath 8; Described device middle part be provided with one pass in the magnetic guiding loop and and the passage that is complementary of magnetic guiding loop shape, the axle center of described passage and the axis coinciding of magnetic guiding loop; Except that hall sensor component and described passage, the space in the insulation-encapsulated housing 7 is full of packing material 6.
Described probe also can comprise and be used for Hall element and 1 magnetic guiding loop 2 are fixed on support 9 on the sacrificial anode supporting leg 1.
In the described probe, when described magnetic guiding loop was circular ring structure, described passage also was a circular passage, and described passage passes the interior ring of described magnetic guiding loop.
The present invention also provides the preparation method of above-mentioned probe for monitoring sacrificial anode current output 14.
The preparation method of above-mentioned probe for monitoring sacrificial anode current output 14 provided by the invention comprises the steps:
1) magnetic guiding loop 3 that will have an opening is sheathed on the sacrificial anode supporting leg 1;
2) Hall element 2 and Hall element circuit 4 are electrically connected; Hall element circuit 4 is electrically connected with an end of watertight cable 5, and the other end of watertight cable 5 is free; Hall element 2 is placed the opening of magnetic guiding loop 3 and be fixed on the sacrificial anode supporting leg 1;
3) the insulation-encapsulated housing that will be provided with opening 10 is sheathed on the sacrificial anode supporting leg 1, forms cavity body, and hall sensor component is packaged in the insulation-encapsulated housing;
4) packing material 6 is filled described cavity body by described opening 10;
5) after packing material 6 solidifies, magnetic shielding oversheath 8 is coated on outside the insulation-encapsulated housing 7, magnetic shielding oversheath 8 is regardless of the electric current of stream by the sacrificial anode supporting leg; The free end of watertight cable 5 stretches out magnetic shielding oversheath 8;
Obtain being installed on the probe for monitoring sacrificial anode current output 14 on the sacrificial anode supporting leg 1.
Magnetic guiding loop 3 and step 2 in the step 1)) in Hall element 2 can be fixed on the sacrificial anode supporting leg 1 by support 9.
For achieving the above object, the present invention can also be by the following technical solutions: probe for monitoring sacrificial anode current output 15 is characterized in that: probe comprises following assembly: sacrificial anode supporting leg 1, hall sensor component, watertight cable 5, packing material 6, insulation-encapsulated housing 7 and magnetic shielding oversheath 8; Hall sensor component is made up of Hall element 2, magnetic guiding loop 3 and Hall element circuit 4;
Magnetic guiding loop 3 is the ring bodies with an opening, is sheathed on the sacrificial anode supporting leg 1; Hall element 2 is located in the opening of magnetic guiding loop, and is fixed on the sacrificial anode supporting leg 1; Hall element circuit 4 is electrically connected with Hall element 2; Described hall sensor component is packaged in the insulation-encapsulated housing 7; Insulation-encapsulated housing 7 is sheathed on the sacrificial anode supporting leg 1, forms annular seal space; Being regardless of the magnetic shielding oversheath 8 of stream by the electric current of sacrificial anode supporting leg is coated on outside the insulation-encapsulated housing 7; Watertight cable 5 one ends are electrically connected with Hall element circuit 4, and the other end stretches out magnetic shielding overcoat 8; Except described hall sensor component, be full of packing material 6 in the described annular seal space.
Described probe also can comprise Hall element and 1 magnetic guiding loop 2 are fixed on support 9 on the sacrificial anode supporting leg 1.
The present invention also provides the preparation method of above-mentioned probe for monitoring sacrificial anode current output 15.
The preparation method of probe for monitoring sacrificial anode current output 15 provided by the invention comprises the steps:
1) magnetic guiding loop 3 that will have an opening is sheathed on the sacrificial anode supporting leg 1;
2) Hall element 2 and Hall element circuit 4 are electrically connected; Hall element circuit 4 is electrically connected with an end of watertight cable 5, and the other end of watertight cable 5 is free; Hall element 2 is placed the opening of magnetic guiding loop 3 and be fixed on the sacrificial anode supporting leg 1;
3) the insulation-encapsulated housing that will be provided with opening 10 is sheathed on the sacrificial anode supporting leg 1, forms cavity body, and hall sensor component is packaged in the packing insulation-encapsulated housing;
4) packing material 6 is filled described cavity body by described opening 10;
5) after packing material 6 solidifies, magnetic shielding oversheath 8 is coated on outside the insulation-encapsulated housing 7, magnetic shielding oversheath 8 is regardless of the electric current of stream by the sacrificial anode supporting leg; The free end of watertight cable 5 stretches out magnetic shielding oversheath 8;
Obtain probe for monitoring sacrificial anode current output 15.
Magnetic guiding loop 3 and step 2 in the step 1)) in Hall element 2 can be fixed on the sacrificial anode supporting leg 1 by support 9.
Any magnetically permeable material that is used for hall measurement all can be used for preparing described magnetic guiding loop, as soft iron, silicon steel or permalloy, and preferred silicon steel.
Any material that satisfies following condition all can be used as packing material: the insulation colloidal liquid, and can be frozen into solid behind the adding solidifying agent certain hour, and not influence magnetic field, or not can not play watertight and resistance to compression effect after solidifying with miscellaneous part generation chemical reaction.Described packing material specifically can be Resins, epoxy; Described Resins, epoxy can adopt the Resins, epoxy of purchase also can adopt the Resins, epoxy of any ordinary method preparation.
The material of described insulation-encapsulated housing specifically can be polyvinylchloride;
The material of described magnetic shielding oversheath can be D36 steel, DH36 steel, soft iron or silicon steel, is preferably D36 steel or DH36 steel.
Described magnetic shielding oversheath is made by electro-conductive material, and described magnetic shielding oversheath is provided with the slit of its shunting of blocking-up by the electric current of sacrificial anode supporting leg.
In the described probe, the internal diameter of magnetic guiding loop, the size of insulation-encapsulated housing, magnetic shielding oversheath, support all depends on the caliber of sacrificial anode supporting leg.The optional producer of Hall element circuit provide with the supporting circuit assembly of transmitter, also can develop voluntarily according to actual needs.
In order to prevent that Resins, epoxy from flowing out housing before solidifying, and can clog the space of causing because of mismachining tolerance between sacrificial anode supporting leg and the encapsulating housing with gasket before the infusion epoxy resin.
Described probe can be applicable to detect in current of galvanic method and the galvanic protection.
When using probe of the present invention, watertight cable free one end is docked with other transmission cable under water, signal imports near the cathodic protection monitoring system tapping box the monitored anode into the most at last.
In the probe for monitoring sacrificial anode current output provided by the invention, the effect of each assembly is as follows:
1) magnetic guiding loop 3
The magnetic field that electric current produced in the sacrificial anode supporting leg of flowing through is gathered together, to improve induction sensitivity and measuring accuracy.
2) Hall element 2 and Hall element circuit 4
Utilize the flow through current of galvanic method of sacrificial anode supporting leg of Hall effectiveness measurement.
3) watertight cable 5
The sensor circuit processed electrical signals is sent to signal collecting device on the water surface.
4) the insulation-encapsulated housing 7
Hall element is shielded; The Hall element and the strong seawater media isolated of magnetic decay that make the current path (airtight section sacrificial anode supporting leg) of measuring position simultaneously and respond to this section passage current magnetic field; guarantee that Hall element can record magnetic field before the seawater decay, to improve the precision and the sensitivity of measuring.
5) packing material 6
Guarantee annular seal space watertight that the insulation-encapsulated housing forms, provide support for housing simultaneously and improve its ultimate compression strength under water.
6) the magnetic shielding oversheath 8
Effect: prevent the external magnetic field interferometry, and the protection housing exempts from collision.
The present invention is owing to adopt above technical scheme, and it has the following advantages:
1) owing to adopt hall sensor component to detect electric current (being current of galvanic method) by the sacrificial anode leg, thus need not cut the anode leg, do not change the mechanical connection between sacrificial anode and the protected structure, so can not destroy the sacrificial anode structure.
2) owing to adopt the electric current (be current of galvanic method) of hall sensor component detection by the sacrificial anode leg; so do not change the electrical connection path between sacrificial anode and the protected structure; even probe breaks down or damages; also can not influence the works better of monitored sacrificial anode, can not cause cathodic protection system to lose efficacy.
3) owing to adopt the electric current (be current of galvanic method) of hall sensor component detection,, greatly reduce heavy industry operation and welding operation amount, reduced construction cost and safety cost so do not need to cut the anode leg by the sacrificial anode leg.
Probe of the present invention is based on the Hall effect principle design, and the Hall effect principle is as follows: when handle is connected with little electric current I
cWafer when placing magnetic induction density to be the magnetic field of B, the current carrier in the semi-conductor is subjected to Lorentz force action to criticize and deflect, and makes the semi-conductor both sides produce the potential difference (see figure 4), this potential difference is Hall voltage V
h, satisfy following relational expression:
R in the formula
hBe Hall coefficient, d is a hall device thickness.
According to Biot-Savart law, when current of galvanic method when steel columnar stays leg flows to the platform jacket structure, will produce magnetic field around the supporting leg, magneticstrength is directly proportional with size of current.This magnetic field can be assembled by soft magnetic materials, detect with hall device then, because the output of magnetic field and hall device has good linear relationship, so the signal size that can utilize hall device to record, direct reaction goes out the size of electric current, that is: I ∝ B ∝ V
hWherein I is the electric current by lead, and B is the magnetic field that produces behind the lead galvanization, V
hThe Hall voltage that in magnetic field B, produces for hall device.
Probe for monitoring sacrificial anode current output provided by the invention has overcome the defective of existing monitoring probe, need not to destroy the structure of sacrificial anode, and non-intervention type is measured the generation electric current of sacrificial anode.Use probe of the present invention; can be under the prerequisite that does not reduce ocean steel construction galvanic anode protection Monitoring systems design safety; implement the monitoring of sacrificial anode working current, even and probe break down or damage, also can not influence the works better of monitored sacrificial anode.
Following embodiment is convenient to understand better the present invention, but does not limit the present invention.
Description of drawings
Fig. 1 is existing galvanic anode protection system architecture synoptic diagram
Fig. 2 supports synoptic diagram for the cutting sacrificial anode.
Fig. 3 measures the current of galvanic method synoptic diagram for using existing probe access type.
Fig. 4 is the Hall effect principle schematic.
Fig. 5 is the front view of probe for monitoring sacrificial anode current output 15.
Fig. 6 is the AA sectional view of probe for monitoring sacrificial anode current output 15.
Fig. 7 is the BB sectional view of probe for monitoring sacrificial anode current output 15.
Fig. 8 is an insulation-encapsulated housing synoptic diagram.
Fig. 9 is for measuring the synoptic diagram of current of galvanic method with probe for monitoring sacrificial anode current output 15 (14).
Embodiment
As Fig. 5-shown in Figure 7, probe for monitoring sacrificial anode current output 15 provided by the present invention comprises sacrificial anode supporting leg 1, hall sensor component, watertight cable 5, packing material 6, insulation-encapsulated housing 7, magnetic shielding oversheath 8 and support 9; Hall sensor component is made up of Hall element 2, magnetic guiding loop 3 and Hall element circuit 4; Magnetic guiding loop 3 is the ring bodies with an opening, is sheathed on the sacrificial anode supporting leg 1, and is fixing by support 9; Hall element 2 is located in the opening of magnetic guiding loop, and is fixed on the sacrificial anode supporting leg 1 by support 9; Hall element circuit 4 is electrically connected with Hall element 2; Described hall sensor component is packaged in the insulation-encapsulated housing 7; Insulation-encapsulated housing 7 is sheathed on the sacrificial anode supporting leg 1, and an opening 10 is arranged on the insulation-encapsulated housing; Being regardless of the magnetic shielding oversheath 8 of stream by the electric current of sacrificial anode supporting leg is coated on outside the insulation-encapsulated housing 7; Watertight cable 5 one ends are electrically connected with Hall element circuit 4, and the other end stretches out magnetic shielding overcoat 8; Except described hall sensor component, be full of packing material 6 in the described insulation-encapsulated housing 7.
Probe for monitoring sacrificial anode current output 14 provided by the present invention is with the sacrificial anode supporting leg 1 in the through hole replacement probe for monitoring sacrificial anode current output 15.
Experimental technique among the following embodiment if no special instructions, is ordinary method.
The assembling of embodiment 1, probe for monitoring sacrificial anode current output and application
One, the preparation of the assembly of probe for monitoring sacrificial anode current output
Hall element: available from transmitter Science and Technology Ltd. suddenly in the Nanjing;
Magnetic guiding loop: material is a silicon steel, is the magnetic guiding loop of two semi-ring types;
Hall element circuit: available from transmitter Science and Technology Ltd. suddenly in the Nanjing;
Watertight cable: available from Shenyang automatization institute;
Packing material: universal joint sealant series of loops epoxy resins 201, available from the prosperous chemical industry of Dongguan City gold company limited;
The insulation-encapsulated housing: material is PVC, is two and half housings, has an opening (see figure 8) on one of them half housing;
The magnetic shielding oversheath: material is the D36 steel, is two and half housings.
Support: material is the D36 steel.
Two, the assembling of probe for monitoring sacrificial anode current output and application
Install on land, on two sacrificial anode supporting legs, carry out the assembling of probe for monitoring sacrificial anode current output respectively.
1, utilize fastening screw that support is fixed on the Al-Zn-In sacrificial anode supporting leg on (supporting leg diameter and wall thickness are 114 φ * 8.5).
2, two semiorbicular magnetic guiding loops are sheathed on the support, form magnetic guiding loop with an opening.
3, Hall element and Hall element circuit are electrically connected; The Hall element circuit is electrically connected with an end of watertight cable.
4, Hall element is placed the opening of magnetic guiding loop and being fixed on the support.
5, utilize screw that two parts of duroplasts insulation-encapsulated housing are sheathed on the sacrificial anode supporting leg, form cavity body, hall sensor component is packaged in the packing insulation-encapsulated housing, opening up.
6, Resins, epoxy is slowly poured into along the opening on the encapsulating housing, until filling cavity body.
7, treat that Resins, epoxy solidifies substantially after, two portions of magnetic shielding oversheath are installed respectively on the encapsulating housing, form the magnetic shielding oversheath, oversheath is provided with and prevents that current of galvanic method from flowing through the magnetic shielding oversheath and the slit of causing shunting.Leave the space between two portions, guarantee that two portions open circuit.The free end of watertight cable stretches out magnetic shielding oversheath 8.
During application; sacrificial anode supporting leg by two probe for monitoring sacrificial anode current output 15 1 connects sacrificial anode 11 and protection negative electrode 12 (see figure 9)s respectively, and the termination that watertight cable is stretched out the magnetic shielding oversheath is gone near the cathodic protection monitoring system tapping box the monitored anode.The electric current of two probe measurements and the generation electric current that is tested sacrificial anode.
Three, the assembling of probe for monitoring sacrificial anode current output and application
Install on land, connect with isolated flange again after a sacrificial anode supporting leg is blocked, on a sacrificial anode supporting leg, carry out the assembling of probe for monitoring sacrificial anode current output.
The same step 2 of the assemble method of probe for monitoring sacrificial anode current output.
During application; connect sacrificial anode and protection negative electrode by the sacrificial anode supporting leg that connects with isolated flange; sacrificial anode supporting leg by probe for monitoring sacrificial anode current output 15 1 connects sacrificial anode 11 and protection negative electrode 12 simultaneously, and the termination that watertight cable is stretched out the magnetic shielding oversheath is gone near the cathodic protection monitoring system tapping box the monitored anode.The electric current of probe measurement is the generation electric current of tested sacrificial anode.
Claims (10)
1, probe for monitoring sacrificial anode current output is characterized in that: it comprises following assembly: hall sensor component, watertight cable (5), packing material (6), insulation-encapsulated housing (7) and magnetic shielding oversheath (8); Described hall sensor component is made up of Hall element (2), magnetic guiding loop (3) and Hall element circuit (4);
Magnetic guiding loop (3) is the ring body with an opening, and Hall element (2) is located in the opening of magnetic guiding loop, and Hall element circuit (4) is electrically connected with Hall element (2); Be regardless of the magnetic shielding oversheath (8) that flows by sacrificial anode supporting leg electric current and be coated on outside the insulation-encapsulated housing (7), hall sensor component is located in the insulation-encapsulated housing (7); Watertight cable (5) one ends are electrically connected with described Hall element circuit (4), and the other end stretches out described magnetic shielding oversheath (8); Described device middle part be provided with one pass in the magnetic guiding loop and and the passage that is complementary of magnetic guiding loop shape, the axle center of described passage and the axis coinciding of magnetic guiding loop; Except that hall sensor component and described passage, the space in the insulation-encapsulated housing (7) is full of packing material (6).
2, probe as claimed in claim 1 is characterized in that: described probe also comprises and is used for Hall element (2) and magnetic guiding loop (3) are fixed on support (9) on the sacrificial anode supporting leg (1).
3, probe as claimed in claim 1 or 2 is characterized in that: the material of described magnetic guiding loop (3) is soft iron, silicon steel or permalloy, preferred silicon steel; Described packing material (6) is a Resins, epoxy; The material of described insulation-encapsulated housing is a polyvinylchloride; The material of described magnetic shielding oversheath (8) is D36 steel, DH36 steel, soft iron or silicon steel, preferred D36 steel or DH36 steel.
4, the preparation method of probe for monitoring sacrificial anode current output comprises the steps:
1) magnetic guiding loop (3) that will have an opening is sheathed on the sacrificial anode supporting leg (1);
2) Hall element (2) and Hall element circuit (4) are electrically connected; The end of Hall element circuit (4) with watertight cable (5) is electrically connected, and the other end of watertight cable (5) is free; Hall element (2) is placed the opening of magnetic guiding loop (3) and be fixed on the sacrificial anode supporting leg (1);
3) the insulation-encapsulated housing that will be provided with opening (10) is sheathed on the sacrificial anode supporting leg (1), form cavity body, will be packaged in the insulation-encapsulated housing by the hall sensor component that Hall element (2), magnetic guiding loop (3) and Hall element circuit (4) are formed;
4) packing material (6) is filled described cavity body by described opening (10);
5) after packing material (6) solidifies, magnetic shielding oversheath (8) is coated on outside the insulation-encapsulated housing (7), magnetic shielding oversheath (8) is regardless of the electric current of stream by sacrificial anode supporting leg (1); The free end of watertight cable (5) stretches out magnetic shielding oversheath (8);
Obtain being installed on the probe for monitoring sacrificial anode current output on the sacrificial anode supporting leg (1).
5, method as claimed in claim 4 is characterized in that: magnetic guiding loop in the step 1) (3) and step 2) in Hall element (2) be fixed on the sacrificial anode supporting leg (1) by support (9);
The material of described magnetic guiding loop (3) is soft iron, silicon steel or permalloy, preferred silicon steel; Described packing material (6) is a Resins, epoxy; The material of described insulation-encapsulated housing (7) is a polyvinylchloride; The material of described magnetic shielding oversheath (8) is D36 steel, DH36 steel, soft iron or silicon steel, preferred D36 steel or DH36 steel.
6, probe for monitoring sacrificial anode current output is characterized in that it comprises following assembly: sacrificial anode supporting leg (1), hall sensor component, watertight cable (5), packing material (6), insulation-encapsulated housing (7) and magnetic shielding oversheath (8); Described hall sensor component is made up of Hall element (2), magnetic guiding loop (3) and Hall element circuit (4);
Magnetic guiding loop (3) is the ring body with an opening, is sheathed on the sacrificial anode supporting leg (1); Hall element (2) is located in the opening of magnetic guiding loop, and is fixed on the sacrificial anode supporting leg (1); Hall element circuit (4) is electrically connected with Hall element (2); Described hall sensor component is packaged in the insulation-encapsulated housing (7); Insulation-encapsulated housing (7) is sheathed on the sacrificial anode supporting leg (1), forms annular seal space; Being regardless of the magnetic shielding oversheath (8) that flows by sacrificial anode supporting leg electric current is coated on outside the insulation-encapsulated housing (7); Watertight cable (5) one ends are electrically connected with described Hall element circuit (4), and the other end stretches out described magnetic shielding overcoat (8); Except described hall sensor component, be full of packing material (6) in the described annular seal space.
7, probe as claimed in claim 6 is characterized in that: described probe also comprises Hall element (2) and magnetic guiding loop (3) is fixed on support (9) on the sacrificial anode supporting leg (1).
8, as claim 6 or 7 described probes, it is characterized in that: the material of described magnetic guiding loop (3) is soft iron, silicon steel or permalloy, preferred silicon steel; Described packing material (6) is a Resins, epoxy; The material of described insulation-encapsulated housing is a polyvinylchloride; The material of described magnetic shielding oversheath (8) is D36 steel, DH36 steel, soft iron or silicon steel, preferred D36 steel or DH36 steel.
9, the preparation method of probe for monitoring sacrificial anode current output comprises the steps:
1) magnetic guiding loop (3) that will have an opening is sheathed on the sacrificial anode supporting leg (1);
2) Hall element (2) and Hall element circuit (4) are electrically connected; The end of Hall element circuit (4) with watertight cable (5) is electrically connected, and the other end of watertight cable (5) is free; Hall element (2) is placed the opening of magnetic guiding loop (3) and be fixed on the sacrificial anode supporting leg (1);
3) the insulation-encapsulated housing that will be provided with opening (10) is sheathed on the sacrificial anode supporting leg (1), form cavity body, will be packaged in the insulation-encapsulated housing by the hall sensor component that Hall element (2), magnetic guiding loop (3) and Hall element circuit (4) are formed;
4) packing material (6) is filled described cavity body by described opening (10);
5) after packing material (6) solidifies, magnetic shielding oversheath (8) is coated on outside the insulation-encapsulated housing (7), magnetic shielding oversheath (8) is regardless of the electric current of stream by sacrificial anode supporting leg (1); The free end of watertight cable (5) stretches out magnetic shielding oversheath (8);
Obtain probe for monitoring sacrificial anode current output.
10, method as claimed in claim 9 is characterized in that: magnetic guiding loop in the step 1) (3) and step 2) in Hall element (2) be fixed on the sacrificial anode supporting leg (1) by support (9);
The material of described magnetic guiding loop (3) is soft iron, silicon steel or permalloy, preferred silicon steel; Described packing material (6) is a Resins, epoxy; The material of described insulation-encapsulated housing (7) is a polyvinylchloride; The material of described magnetic shielding oversheath (8) is D36 steel, DH36 steel, soft iron or silicon steel, preferred D36 steel or DH36 steel.
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| CN201280595Y (en) * | 2008-09-25 | 2009-07-29 | 中国海洋石油总公司 | Sacrificial anode generating current monitoring probe |
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2008
- 2008-09-25 CN CN2008102227851A patent/CN101376982B/en not_active Expired - Fee Related
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| CN105223413B (en) * | 2015-06-26 | 2018-09-04 | 中国船舶重工集团公司第七二五研究所 | A kind of marine ship seawater pipeline stray current detecting device |
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| CN111705321A (en) * | 2020-05-08 | 2020-09-25 | 中国船舶重工集团公司第七二五研究所 | Sacrificial anode iron leg |
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