Reference electrode for oil and gas pipeline

Abstract

The reference electrode comprises an electrode body, the electrode body comprises a transparent middle shell, a front connecting base, a rear connecting base, a binding post and a ceramic end, internal threads are arranged at the two ends of the inner wall of the transparent middle shell, one end of the transparent middle shell is in threaded connection with a first connecting external thread fixedly connected with one end of the front connecting base, and the other end of the transparent middle shell is in threaded connection with a second connecting external thread. One end of the transparent middle shell is fixedly connected with one end of the front connecting seat, the other end of the front connecting seat is fixedly connected with one end of the ceramic end socket, and the other end of the transparent middle shell is in threaded connection with a second connecting external thread which is fixedly connected with one end of the rear connecting seat. A reference electrode solution in the transparent middle shell can be added in time, so that the problem of electrode failure caused by leakage of the reference electrode solution is avoided; when the reference electrode is not used, one end of the ceramic end of the electrode needs to be sleeved with a protective rubber cap, pollution is avoided, and the detection accuracy of the reference electrode of the oil and gas pipeline is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of reference electrode detection for oil and gas pipelines, and specifically relates to a reference electrode for oil and gas pipelines. Background Technique

[0002] A reference electrode is an electrode used as a reference comparison when measuring various electrode potentials. By forming a battery with the electrode to be measured and a reference electrode with a precisely known electrode potential value, and measuring the battery electromotive force value, the electrode potential of the electrode to be measured can be calculated. Currently, most reference electrodes for measuring the cathodic protection potential of oil and gas pipelines use microporous ceramic semi-permeable membranes for the conduction of electrolytes inside and outside the reference electrode. However, the existing reference electrodes have the following defects:

[0003] 1. Since it allows the solvent to pass through, after a period of time under osmosis, it will inevitably lead to the leakage of the reference electrode solution and ultimately cause the electrode to fail. Although the use of a double-chamber structure and packing can alleviate this problem and extend the service life of the reference electrode, it cannot fundamentally solve this problem;

[0004] 2. The microporous ceramic semi-permeable membrane of the reference electrode lacks protection and is easily contaminated when not in use, resulting in unstable potential and affecting the accuracy of measuring the cathodic protection potential of oil and gas pipelines. Content of the Utility Model

[0005] The purpose of the utility model is to provide a reference electrode for oil and gas pipelines to solve the problems raised in the above background technique, that is, since it allows the solvent to pass through, after a period of time under osmosis, it will inevitably lead to the leakage of the reference electrode solution and ultimately cause the electrode to fail. Although the use of a double-chamber structure and packing can alleviate this problem and extend the service life of the reference electrode, it cannot fundamentally solve it; the microporous ceramic semi-permeable membrane of the reference electrode lacks protection and is easily contaminated when not in use, resulting in unstable potential and affecting the accuracy of measuring the cathodic protection potential of oil and gas pipelines.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reference electrode for oil and gas pipelines, comprising an electrode, the electrode comprising a transparent middle shell, a front connecting seat, a rear connecting seat, a terminal and a ceramic terminal, both ends of the inner wall of the transparent middle shell are provided with internal threads, one end of the transparent middle shell is threadedly connected to a first connecting outer thread fixedly connected to one end of the front connecting seat, the other end of the front connecting seat is fixedly connected to one end of the ceramic terminal, the other end of the transparent middle shell is threadedly connected to a second connecting outer thread fixedly connected to one end of the rear connecting seat, the middle part of the rear connecting seat is threadedly connected to the terminal, and the connecting The terminal post is threadedly connected with a port bolt for fixing the terminal post on the rear connecting seat, one end of the terminal post extends into the interior of the transparent middle shell, the middle part of the other end of the terminal post is threadedly connected with a terminal head, the front and rear ends of the transparent middle shell are respectively threadedly fixed with the front connecting seat and the rear connecting seat, the front connecting seat is connected to the ceramic terminal head, the rear connecting seat is connected to the terminal post and the terminal head on the terminal post, an external detection power supply is connected through the terminal head, the end of the ceramic terminal away from the front connecting seat is snap-connected with a protective rubber cap for protecting the ceramic terminal, the protective rubber cap protects one end of the electrode, and the interior of the transparent middle shell is filled with a copper sulfate solution.

[0007] As a preferred technical solution of the utility model, the inner diameter of the protective rubber cap is the same as the outer diameter of the ceramic end head, the protective rubber cap matches the ceramic end head, and the protective rubber cap is sleeved on the ceramic end head.

[0008] As a preferred technical solution of the utility model, the terminal is made of copper, and the front connecting seat and the rear connecting seat are both made of resin. The terminal can conduct electricity, and the stock of the copper sulfate solution can be observed through the transparent middle shell, so it can be added in time.

[0009] As a preferred technical solution of the utility model, the length of the protective rubber cap is 39 mm, and a plurality of observation windows are provided on the surface of the transparent middle shell, through which the reference electrode solution inside the transparent middle shell can be more clearly observed.

[0010] As a preferred technical solution of the utility model, the transparent middle shell includes a substrate layer and an isolation layer, the isolation layer is fixedly connected to the outer side of the substrate layer, the substrate layer is made of organic glass, and the isolation layer is made of a reflective insulation film. The organic glass is corrosion-resistant, and the reflective insulation film reduces the impact of sunlight.

[0011] As a preferred technical solution of the utility model, a knob with anti-slip patterns on the surface is fixedly provided on the wiring head, and the wiring head can be rotated by the knob to facilitate installation and disassembly of the wiring head.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. By observing the remaining amount of the reference electrode solution in the transparent middle shell through the transparent middle shell, the reference electrode solution inside the transparent middle shell can be added in a timely manner to avoid the problem of electrode failure caused by the leakage of the reference electrode solution;

[0014] 2. When not in use, the ceramic end of the electrode should be covered with a protective rubber cap to avoid being contaminated and ensure the accuracy of the detection of the reference electrode for the oil and gas pipeline. Brief Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a structural diagram of the electrode of the present utility model;

[0017] Figure 3 is a structural diagram of the transparent middle shell of the present utility model;

[0018] Figure 4 is a structural diagram of the front connection seat of the present utility model;

[0019] Figure 5 is a structural diagram of the rear connection seat of the present utility model;

[0020] Figure 6 is a composition structural diagram of the transparent middle shell of the present utility model.

[0021] In the figure: 1. Electrode; 2. Protective rubber cap; 3. Transparent middle shell; 4. Front connection seat; 5. Rear connection seat; 6. Terminal; 7. Port bolt; 8. Wiring head; 9. Ceramic end; 10. Internal thread; 11. First connecting external thread; 12. Second connecting external thread; 13. Substrate layer; 14. Isolation layer; 15. Knob. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-6, the present utility model provides a reference electrode for an oil and gas pipeline, including electrode 1. Electrode 1 includes a transparent middle shell 3, a front connection seat 4, a rear connection seat 5, a terminal post 6, and a ceramic end 9. Internal threads 10 are provided at both ends of the inner wall of the transparent middle shell 3. One end of the transparent middle shell 3 is threadedly connected to a first connecting external thread 11 fixedly connected to one end of the front connection seat 4. The other end of the front connection seat 4 is fixedly connected to one end of the ceramic end 9. The other end of the transparent middle shell 3 is threadedly connected to a second connecting external thread 12 fixedly connected to one end of the rear connection seat 5. The middle of the rear connection seat 5 is threadedly connected to the terminal post 6, and a port bolt 7 for fixing the terminal post 6 on the rear connection seat 5 is threadedly connected to the terminal post 6. One end of the terminal post 6 extends into the transparent middle shell 3, and a connection head 8 is threadedly connected to the middle of the other end of the terminal post 6. The inside of the transparent middle shell 3 is filled with copper sulfate solution. The terminal post 6 is made of copper, the front connection seat 4 and the rear connection seat 5 are both made of resin, and a protective rubber cap 2 for protecting the ceramic end 9 is snap-fitted to the end of the ceramic end 9 away from the front connection seat 4. When measuring the cathodic protection potential of the oil and gas pipeline, sprinkle a small amount of clear water on the electrode 1. The ceramic end 9 serves as a semi-permeable membrane. Check the copper sulfate solution inside the transparent middle shell 3. If it is not full, open the rear connection seat 5 and replenish the solution inside to avoid the problem of electrode failure caused by the leakage of the reference electrode solution. Contact the ceramic end 9 of the electrode 1 with the position to be tested, and then perform the power supply work by clamping the connection head 8 with a wire with a fish mouth clip. The protective rubber cap 2 protects one end of the electrode. Remove the protective rubber cap 2 before use.

[0024] The length of the protective rubber cap 2 is 39 mm. A plurality of observation windows are provided on the surface of the transparent middle shell 3, and the reference electrode solution inside the transparent middle shell 3 can be observed more clearly through the observation windows. The inner diameter of the protective rubber cap 2 is the same as the outer diameter of the ceramic end 9. The protective rubber cap 2 matches the ceramic end 9, and the protective rubber cap 2 is sleeved on the ceramic end 9.

[0025] The transparent middle shell 3 includes a base material layer 13 and an isolation layer 14. The isolation layer 14 is fixedly connected to the outside of the base material layer 13. The base material layer 13 is made of plexiglass, and the isolation layer 14 is made of a reflective heat insulation film. Plexiglass is corrosion-resistant, and the reflective heat insulation film reduces the influence of sunlight irradiation.

[0026] A knob 15 with anti-slip lines on its surface is fixedly provided on the connection head 8. By rotating the knob 15, the connection head 8 can be easily installed and disassembled.

[0027] When in specific use, for the reference electrode of the utility model for oil and gas pipelines, when measuring the cathodic protection potential of oil and gas pipelines, remove the protective rubber cap 2. The ceramic end 9 serves as a semi-permeable membrane. Sprinkle a small amount of clear water on the electrode 1 and check the copper sulfate solution inside the transparent middle shell 3. If it is not full, open the rear connection seat 5 and supplement the solution inside. Make the ceramic end 9 of the electrode 1 contact the position to be tested, and then supply power by clamping the wire with a fish mouth clip on the terminal 8. When not in use, use the protective rubber cap 2 to cover one end of the ceramic end 9 of the electrode 1 to avoid contamination. Regularly replace the copper sulfate inside the transparent middle shell 3 to avoid the problem of electrode failure caused by the leakage of the reference electrode solution, and clean the internal terminal 6 with a non-metallic abrasive material to ensure the stability of the reference electrode potential. When measuring the cathodic protection potential of oil and gas pipelines, a spare reference electrode should be prepared. If the electrode is lost, another reference electrode can be used to continue working.

[0028] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A reference electrode for oil and gas pipelines, comprising an electrode (1), characterized in that: The electrode (1) comprises a transparent middle shell (3), a front connection seat (4), a rear connection seat (5), a terminal (6) and a ceramic terminal (9); both ends of the inner wall of the transparent middle shell (3) are provided with internal threads (10); one end of the transparent middle shell (3) is threadedly connected to a first connecting outer thread (11) fixedly connected to one end of the front connection seat (4); the other end of the front connection seat (4) is fixedly connected to one end of the ceramic terminal (9); the other end of the transparent middle shell (3) is threadedly connected to a second connecting outer thread (12) fixedly connected to one end of the rear connection seat (5). The middle part of the rear connection seat (5) is threadedly connected to the terminal post (6), and the terminal post (6) is threadedly connected to a port bolt (7) for fixing the terminal post (6) on the rear connection seat (5). One end of the terminal post (6) extends into the interior of the transparent middle shell (3), and the middle part of the other end of the terminal post (6) is threadedly connected to a terminal head (8). The end of the ceramic terminal head (9) away from the front connection seat (4) is snap-connected with a protective rubber cap (2) for protecting the ceramic terminal head (9), and the interior of the transparent middle shell (3) is filled with a copper sulfate solution.

2. A reference electrode for oil and gas pipelines according to claim 1, characterized in that: The inner diameter of the protective rubber cap (2) is the same as the outer diameter of the ceramic end cap (9).

3. The reference electrode for oil and gas pipeline according to claim 1, characterized in that: The terminal (6) is made of copper, and the front connection seat (4) and the rear connection seat (5) are both made of resin.

4. The reference electrode for oil and gas pipeline according to claim 1, characterized in that: The length of the protective rubber cap (2) is 39 mm, and a plurality of observation windows are provided on the surface of the transparent middle shell (3).

5. The reference electrode for oil and gas pipeline according to claim 1, characterized in that: The transparent middle shell (3) comprises a substrate layer (13) and an isolation layer (14); the isolation layer (14) is fixedly connected to the outer side of the substrate layer (13); the substrate layer (13) is made of organic glass; and the isolation layer (14) is made of a reflective heat-insulating film.

6. A reference electrode for oil and gas pipelines according to claim 1, characterized in that: The wiring head (8) is fixedly provided with a knob (15) with anti-slip patterns on its surface.

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