CN201319014Y

CN201319014Y - Polarization-testing probe

Info

Publication number: CN201319014Y
Application number: CNU2008200754009U
Authority: CN
Inventors: 陈嘉兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-21
Filing date: 2008-07-21
Publication date: 2009-09-30
Anticipated expiration: 2018-07-21

Abstract

The utility model discloses a polarization-testing probe comprising a sleeve cylinder consisting of two plastic cylinders and a steel disc attached to the bottom of the sleeve cylinder, and is characterized in that an electrode made of high purity copper or high purity zinc, and saturated copper sulfate solution or zincate solution are arranged in an inner cylinder of the sleeve cylinder; holes are formed at the bottom of the inner cylinder; the inner cylinder is communicated with an outer cylinder through a semi-permeable membrane; the outer cylinder is filled with an inertia saturated electrolytic solution; a plastic stub pipe protruding out of the surface of the steel disc and concentric with the steel disc is arranged at the bottom of the outer cylinder; a salt bridge hole formed by semi-permeable membrane micropore ceramics is beset inside the plastic stub pipe and placed in hollow part of the steel disc. When being used for the measurement, the polarization-testing probe can eliminate unavoidable IR drops and introduced errors which are generated in the ground potential measurement of a conventional pipe, conveniently conduct the power-off measurement, and effectively shield the stray interference, thereby enabling the difficult polarized potential measurement for pipelines in areas with severe stray currents to be simple, stable, and real.

Description

The polarization test probe

Technical field

The utility model relates to a kind of measurement mechanism that is used for steel pipe cathodic protection polarized potential.

Background technology

Cathodic protection is to be the technology that prevents that the steel conduit corrosion from extensively adopting, and the measurement of polarized potential is a main control parameters of implementing this technology.Can cause error because of inevitable IR falls when measuring the polarized potential of buried pipe with conventional method.Need adopt the outage mensuration to eliminate, even but be difficult to carry out and when stray current disturbs, adopt the outage method also to be difficult to measure real pipeline polarized potential because of much inconvenient in outage measurement regular meeting on the engineering for this reason.

The utility model content

At above-mentioned prior art, the utility model provides a kind of polarization test probe, makes the polarized potential measurement that can't carry out with conventional method in the clutter interference zone become very simple, easy, true and reliable.

In order to solve the problems of the technologies described above, the technical scheme that the utility model polarization test probe is achieved is: this polarization test probe, formed by sleeve and the appended steel disk of cover tube bottom that two plastic barrels constitute, be provided with electrode and copper/saturated copper sulphate solution or the zinc solution made by high purity copper or zinc in the inner core of described sleeve; In the bottom opening of described inner core, described inner core communicates by semi-permeable diaphragm and urceolus; Be full of the saturated electrolyte solution of inertia in the described urceolus, the bottom of described urceolus is provided with one and protrudes in the surface of steel disk and the plastic tubulature concentric with steel disk, stud with the salt bridge opening that is formed by the semi-permeable diaphragm micropore ceramics in the described plastic tubulature, described salt bridge opening is placed in the central hollow of steel disk.

The utility model polarization test probe, wherein, described inner core constitutes copper/copper sulphate or zinc contrast electrode; Described urceolus constitutes salt bridge, and described salt bridge opening is by plastic tubulature and steel disk insulation; During use, described steel disk is communicated with buried pipe by lead.

Compared with prior art, the beneficial effects of the utility model are: the utility model polarization test probe can make the IR that measures on the passage fall the influence that reduces to minimum (can ignore on the engineering) and be not subjected to the clutter interference electric current fully, and can implement outage easily and measure.

Description of drawings

Fig. 1-the 1st, the front view of the utility model polarization test probe structure;

Fig. 1-2 is that the end of the test probe structure of polarization shown in Fig. 1-1 is to view;

Fig. 2 is the wiring schematic diagram of the utility model polarization test probe.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done to describe in further detail.

The utility model main parts size and specification specified: 1. inner core, 2. electrode, 3. copper/saturated copper sulphate solution or zinc solution, 4. semi-permeable diaphragm, 5. urceolus, 6. short tube, 7. semi-permeable diaphragm micropore ceramics (also being the salt bridge opening), the 8. saturated electrolyte solution of inertia, 9. steel disk.

Shown in Fig. 1-1 and Fig. 1-2, the utility model polarization test probe is formed by two concentric plastic sleeves with attached to the steel disk 9 by concentric hole of plastic sleeve bottom, wherein, inner core 1 built-in electrode 2 and the copper/saturated copper sulphate solution or the zinc solution of making by high purity copper or zinc 3 of plastic sleeve, and, make inner core 1 be connected by semi-permeable diaphragm 4 and urceolus 5 in the bottom opening of inner core 1.Be full of the saturated electrolyte solution 8 of inertia in the urceolus 5, be provided with one in the bottom of urceolus 5 and protrude in the surface of steel disk 9 and the plastic tubulature 6 concentric with steel disk 9, stud with semi-permeable diaphragm micropore ceramics 7 in the plastic tubulature 6, described semi-permeable diaphragm micropore ceramics 7 forms the salt bridge openings.Described inner core 1 constitutes copper/copper sulphate or zinc contrast electrode, urceolus 5 just becomes the buffering salt bridge of contrast electrode that inner core 1 constitutes like this, and with the salt bridge opening by the insulation plastic tubulature 6 and semi-permeable diaphragm micropore ceramics 7 place in the central hollow of steel disk 9, be that steel disk 9 is looped around around the salt bridge opening 7, thus, the salt bridge that urceolus 5 constitutes is at the center of steel disk 9, and with steel disk 9 insulation; During use, steel disk 9 is communicated with buried pipe by lead.

As seen from Figure 2, after the utility model polarization test probe is placed in the soil media identical with buried pipe, Closing Switch K, the steel disk 9 of probe bottom just passes through lead, and stake is connected with buried pipe and introduces polarization after tested, thereby make steel disk 9 and buried pipe have identical polarized potential (being the sacrificial anode protection cathodic polarization shown in Fig. 2, also can be impressed current method).At this moment, just can measure the polarized potential of steel disk 9 (also being buried pipe) at an easy rate with high resistance voltmeter by salt bridge opening 7 by inner core 1 built-in copper/copper sulphate or zinc contrast electrode.Because the tube wall of salt bridge opening 7 is very thin, semi-permeable diaphragm micropore ceramics 7 is very near with steel disk 9 distances, and the IR that then causes thus falls minimum, can ignore fully on engineering, and promptly measured electrode potential is exactly a real polarized potential on the pipeline.Because salt bridge opening 7 is very little, and by steel disk 9 around encirclement, therefore, when the ratio of the area of steel disk 9 and salt bridge opening 7 enough greatly the time, the clutter interference electric current will be shielded by steel disk 9 fully, and can not influence potential measurement.The utility model polarization test probe is when the actual measurement of serious interference area, and numerical value is highly stable, level and smooth, accurate, interference-free fully influence.

When disconnect steel disk 9 and pipeline be connected K switch the time, promptly cut off the input of polarization current, at this moment, on the utility model polarization test probe, just can implement easily " measurement of cutting off the power supply ".

Claims

One kind the polarization test probe, formed by sleeve and the appended steel disk of cover tube bottom that two plastic barrels constitute, be it is characterized in that: be provided with electrode (2) and copper/saturated copper sulphate solution or the zinc solution (3) made by high purity copper or zinc in the inner core of described sleeve (1); Bottom opening in described inner core (1), described inner core (1) communicates by semi-permeable diaphragm (4) and urceolus (5); Be full of the saturated electrolyte solution of inertia (8) in the described urceolus (5), the bottom of described urceolus (5) is provided with one and protrudes in the surface of steel disk (9) and the plastic tubulature (6) concentric with steel disk (9), stud with the salt bridge opening that is formed by semi-permeable diaphragm micropore ceramics (7) in the described plastic tubulature (6), described salt bridge opening is placed in the central hollow of steel disk (9).
2. according to the described polarization test probe of claim 1, it is characterized in that: described inner core (1) constitutes copper/copper sulphate or zinc contrast electrode; The salt bridge that described urceolus (5) constitutes, described salt bridge opening is by plastic tubulature (6) and steel disk (9) insulation; During use, described steel disk (9) is communicated with buried pipe by lead.