CN216209428U - Device for measuring stray current of soil near buried pipeline - Google Patents
Device for measuring stray current of soil near buried pipeline Download PDFInfo
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- CN216209428U CN216209428U CN202122606291.7U CN202122606291U CN216209428U CN 216209428 U CN216209428 U CN 216209428U CN 202122606291 U CN202122606291 U CN 202122606291U CN 216209428 U CN216209428 U CN 216209428U
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Abstract
The utility model discloses a device for measuring stray current of soil near a buried pipeline, which comprises a central panel, wherein the bottom of the central panel is at least provided with two test rods, and the two test rods are arranged oppositely; the test rod is hinged with the central panel and can be folded along the hinged part, and the test rod is of a telescopic structure; the surface of the central panel is provided with a telescopic cable and an alligator clip for connecting with a pipeline or a pipeline measuring lead; the surface of the central panel is provided with a potential difference display screen; the surface of the central panel is provided with a direct current/alternating current conversion knob, and an internal circuit of the potential difference display screen is electrically connected with the crocodile clip and the test head and is used for displaying direct current potential difference and alternating current potential difference; and at least one test rod is provided with a display screen for displaying the actual distance and the potential difference between the two test heads. The device can directly read the potential difference and the distance between two points, is convenient for calculating the potential gradient, realizes single measurement and improves the test stability.
Description
Technical Field
The utility model belongs to the field of measuring the corrosivity of soil near a buried pipeline, and particularly relates to a device for measuring stray current of soil near the buried pipeline and a using method thereof.
Background
Stray currents are currents that flow along paths other than the intended path, flow in the soil, and are not related to the protected piping system. The current enters the pipeline from a certain part of the pipeline, flows into soil from the pipeline after flowing along the pipeline for a certain distance, and the pipeline is corroded at the current flowing part, wherein the corrosion is stray current corrosion. Stray current corrosion is one of the most dangerous forms of corrosion in buried pipelines, and can cause rapid corrosive leakage of buried pipelines. Therefore, the investigation of the stray current of the soil around the buried pipeline is one of the important inspections of the buried pipeline.
Stray current interference in soil is divided into direct current stray current interference and alternating current stray current interference. Whether a buried metal structure is interfered by direct current stray current is generally judged by measuring a ground potential gradient and a pipe-to-ground potential; and judging whether the buried metal structure is interfered by alternating-current stray current or not by measuring alternating-current interference voltage. In the process of measuring the ground potential gradient and the tube-to-ground potential, a saturated copper sulfate reference electrode is required to be used as a reference electrode, the commonly used saturated copper sulfate reference electrode is made of organic glass, and the top end of the saturated copper sulfate reference electrode is filled with sintered ceramic. In the field use process, firstly, manually digging small pits for placing the reference electrode, and the reference electrode is very easy to extrude and damage due to small stones in soil. And the virtual connection between the saturated copper sulfate reference electrode and the test cable is difficult to find in time, so that the test error is increased. In the process of testing the ground potential gradient, after the potential difference between two points is tested, the distance between the two points needs to be accurately measured to calculate the potential gradient, and the test process cannot be operated by one person. At present, no device specially used for measuring the stray current of soil near a buried pipeline exists.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model aims to provide a device for measuring the stray current of the soil near a buried pipeline, which can directly read the potential difference and the distance between two points, is convenient for calculating the potential gradient, realizes single-person measurement and improves the test stability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a device for measuring stray current of soil near a buried pipeline comprises a central panel, wherein at least two test rods are arranged at the bottom of the central panel, and the two test rods are arranged oppositely; the testing rod is hinged with the central panel and can be folded along the hinged part, and the testing rod is of a telescopic structure;
the surface of the central panel is provided with a telescopic cable and an alligator clip for connecting with a pipeline or a pipeline measuring lead, one end of the telescopic cable is electrically connected with the central panel, and the other end of the telescopic cable is connected with the alligator clip; the surface of the central panel is provided with a potential difference display screen; the surface of the central panel is provided with a direct current/alternating current conversion knob, and an internal circuit of the potential difference display screen is electrically connected with the crocodile clip and the test head and is used for displaying direct current potential difference and alternating current potential difference;
and at least one test rod is provided with a display screen for displaying the actual distance and the potential difference between the two test heads.
As a further improvement of the utility model, the test rod comprises a first-stage test rod, a second-stage test rod is sleeved in the first-stage test rod, a third-stage test rod is sleeved in the second-stage test rod, and a test head is arranged at the tail end of the third-stage test rod; the first-stage test rod, the second-stage test rod and the third-stage test rod form a telescopic structure.
As a further improvement of the utility model, the test head comprises a stainless steel reference electrode protective shell, a saturated copper sulfate reference electrode and a protective shell top cover plate; the conical stainless steel reference electrode protective shell is arranged at the bottom of the cover plate at the top of the protective shell, the saturated copper sulfate reference electrode is arranged in the stainless steel reference electrode protective shell, and a round hole is formed in the bottom of the stainless steel reference electrode protective shell; the saturated copper sulfate reference electrode is electrically connected with the display screen.
As a further improvement of the utility model, the diameter of the circular hole is consistent with the diameter of the saturated copper sulfate reference electrode.
As a further improvement of the utility model, the stainless steel reference electrode protective shell is conical.
As a further improvement of the utility model, the bottom of the central panel is provided with four test rods, and the four primary test rods are distributed at 90 degrees.
A use method of a soil stray current measuring device near a buried pipeline comprises the following steps:
when the ground potential of the buried pipeline is measured, rotating a direct current/alternating current conversion knob to a direct current gear, connecting an alligator clip with the pipeline or a pipeline measuring lead, opening each test rod, and placing a test head above the buried pipeline; reading the reading through a potential difference display screen to obtain the pipe-to-ground potential of the pipeline; when the alternating current interference condition of the pipeline is measured, rotating a direct current/alternating current conversion knob to an alternating current gear, connecting an alligator clip with the pipeline or a pipeline measuring lead, opening each test rod, and placing a test head above the pipeline; reading through a potential difference display screen to obtain the AC interference potential of the pipeline.
As a further improvement of the utility model, the method also comprises the following steps:
when measuring the soil ground potential gradient, firstly opening each test rod to be positioned at the same horizontal plane with the central panel, adjusting the length of each test rod, and respectively burying a test head in the soil; and reading the potential difference and the distance between the two opposite test heads through a display screen, and directly calculating the soil-ground potential gradient.
Compared with the prior art, the utility model has the following advantages:
according to the utility model, at least two test rods are arranged at the bottom of the central panel, the stray current of the soil near the buried pipeline can be measured through the two test rods, the distance and the potential difference between the two groups of reference electrodes can be read simultaneously through the real-time display of the display, the device can be operated by a single person, and the stray current of the soil can be measured by the single person.
Furthermore, the saturated copper sulfate reference electrode is arranged in the conical stainless steel protective sleeve, so that the saturated copper sulfate reference electrode can be protected in a field actual use environment, and the service life of the saturated copper sulfate reference electrode is prolonged.
Furthermore, the 4 test rods can be stretched and folded, so that the device is convenient to store and carry when not in use.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. In the drawings:
FIG. 1 is a schematic view of a portable soil stray current measuring device according to the present invention;
FIG. 2 is a schematic view of a portable soil stray current measuring device according to the present invention after being folded;
FIG. 3 is a schematic view of the internal structure of the test probe of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 3, the utility model provides a device for measuring stray current of soil near a buried pipeline, which comprises a central panel 1, wherein at least two test rods are arranged at the bottom of the central panel 1, and the two test rods are arranged oppositely; the testing rod is hinged with the central panel 1 and can be folded along the hinged part, and the testing rod is of a telescopic structure;
the surface of the central panel 1 is provided with a telescopic cable 9 and an alligator clip 7 for connecting with a pipeline or a pipeline measuring lead, one end of the telescopic cable 9 is electrically connected with the central panel 1, and the other end of the telescopic cable is connected with the alligator clip 7; the surface of the central panel 1 is provided with a potential difference display screen 8; the surface of the central panel 1 is provided with a direct current/alternating current conversion knob 26, and an internal circuit of the potential difference display screen 8 is electrically connected with the crocodile clip 7 and the test head for displaying direct current potential difference and alternating current potential difference;
and at least one test rod is provided with a display screen for displaying the actual distance and the potential difference between the two test heads.
The utility model provides a specific embodiment, wherein the test rod is of a telescopic structure; the concrete structure is as follows: the test rod comprises a first-stage test rod, a second-stage test rod is sleeved in the first-stage test rod, a third-stage test rod is sleeved in the second-stage test rod, and a test head is arranged at the tail end of the third-stage test rod; the first-stage test rod, the second-stage test rod and the third-stage test rod form a telescopic structure.
Wherein the test head comprises a stainless steel reference electrode protective shell 22, a saturated copper sulfate reference electrode 23 and a protective shell top cover plate 24; the conical stainless steel reference electrode protective shell 22 is arranged at the bottom of a cover plate 24 at the top of the protective shell, the saturated copper sulfate reference electrode 23 is arranged in the stainless steel reference electrode protective shell 22, and a round hole is formed in the bottom of the stainless steel reference electrode protective shell 22; the saturated copper sulfate reference electrode 23 is electrically connected with the display screen. The saturated copper sulfate reference electrode is arranged in the conical stainless steel protective sleeve, so that the saturated copper sulfate reference electrode can be protected in the field actual use environment, and the service life of the saturated copper sulfate reference electrode is prolonged.
Four test rods are arranged at the bottom of the central panel 1, and the four first-level test rods are distributed at 90 degrees. 4 test bars homoenergetic are flexible, folding, accomodate and carry when the device does not use.
The utility model also provides a use method of the device for measuring the stray current of the soil near the buried pipeline, which comprises the following steps:
when the ground potential of the buried pipeline is measured, the direct current/alternating current conversion knob 26 is rotated to a direct current gear, the alligator clip 7 is connected with the pipeline or a pipeline measuring lead, each test rod is opened, and the test head is placed above the buried pipeline; reading through a potential difference display screen 8 to obtain the pipe-to-ground potential of the pipeline; when the alternating current interference condition of the pipeline is measured, the direct current/alternating current conversion knob 26 is rotated to an alternating current gear, the crocodile clip 7 is connected with the pipeline or a pipeline measuring lead, each testing rod is opened, and the testing head is placed above the pipeline; reading is carried out through the potential difference display screen 8, and the reading is the alternating current interference potential of the pipeline.
When measuring the soil ground potential gradient, firstly opening each test rod to be positioned at the same horizontal plane with the central panel, adjusting the length of each test rod, and respectively burying a test head in the soil; and reading the potential difference and the distance between the two opposite test heads through a display screen, and directly calculating the soil-ground potential gradient.
The utility model is further described with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the device for measuring the stray current of the soil near a buried pipeline comprises a central panel 1, wherein the bottom of the central panel is provided with a foldable # 1 first-level test rod 5, #2 first-level test rod 13, #3 first-level test rod 17 and #4 first-level test rod 18. The four test rods are distributed at 90 degrees. The #1 first-stage test rod 5 is sleeved with a #1 second-stage test rod 4, and the #1 second-stage test rod 4 is sleeved with a #1 third-stage test rod 3. The #1 tertiary test rod 3 ends with a #1 test head. The #2 second-stage testing rod 12 is sleeved in the #2 first-stage testing rod 13, and the #2 third-stage testing rod 11 is sleeved in the #2 second-stage testing rod 12. The #2 tertiary test rod 11 ends with a #2 test head. A #3 second-stage testing rod 16 is sleeved in the #3 first-stage testing rod 17, and a #3 third-stage testing rod 15 is sleeved in the #3 second-stage testing rod 16. The #3 tertiary test rod 15 terminates with a #3 test head 14. The #1 second-stage testing rod 4 is sleeved in the #4 first-stage testing rod 5, and the #1 third-stage testing rod 3 is sleeved in the #1 second-stage testing rod 4. The #1 tertiary test rod 3 ends with a #4 test head.
The extension or contraction of each stage of test rod can be adjusted according to the distance requirement of the test electrode in the use process. Open each test bar and be in same horizontal plane with central panel at the test in-process, for convenient storage after stopping the test, can fold each test bar. The folded device is shown in figure 2.
The surface of the #1 primary test rod 5 is provided with a display screen 6 which can display the actual distance and potential difference between the #1 test head and the #3 test head. The surface of the #3 primary test rod 17 is provided with a display screen 25 which can display the actual distance and potential difference between the #2 test head and the #4 test head. The surface of the central panel 1 is provided with a retractable cable 9 and an alligator clip 7, and the surface of the central panel is provided with a potential difference display screen 8. The surface of the central panel 1 is provided with a direct current/alternating current conversion knob 26, the gear can be switched, and the direct current potential difference and the alternating current potential difference between the crocodile clip 7 and the #1 test head are displayed on the potential difference display screen 8 respectively.
As shown in fig. 3. Taking a #1 test head as an example, the internal structure is introduced as follows: the #1 test head comprises a conical stainless steel reference electrode protective shell 22, a saturated copper sulfate reference electrode 23 and a protective shell top cover plate 24. The bottom of the conical stainless steel reference electrode protective shell 22 is provided with a round hole, and the diameter of the round hole is consistent with that of the saturated copper sulfate reference electrode 23. During actual measurement, the bottom end of the sintered ceramic at the bottom of the saturated copper sulfate reference electrode 23 can be in contact with the soil through the circular hole. The internal structure of #2, #3 and #4 test heads are identical to that of #1 test head. The device can measure the tube ground potential, the soil ground potential gradient and the pipeline alternating current interference condition.
The utility model also provides a using method of the device for measuring the stray current of the soil near the buried pipeline, which comprises the following steps:
when measuring the ground potential of a buried pipeline, the direct current/alternating current conversion knob 26 is rotated to a direct current gear, the crocodile clip 7 is connected with the pipeline or a pipeline measuring lead, the testing rod of the #1 level is opened, and the #1 testing head is arranged above the buried pipeline. And reading through the potential difference display screen 8 to obtain the pipe-to-ground potential of the pipeline. When the alternating current interference condition of the pipeline is measured, the direct current/alternating current conversion knob 26 is rotated to an alternating current gear, the crocodile clip 7 is connected with the pipeline or a pipeline measuring lead, the testing rod of the #1 stage is opened, and the #1 testing head is placed above the pipeline. Reading is carried out through the potential difference display screen 8, and the reading is the alternating current interference potential of the pipeline.
When measuring the soil ground potential gradient, firstly, opening each test rod to be at the same horizontal plane with the central panel, adjusting the length of each test rod, and burying the test heads #1, #2, #3 and #4 in the soil respectively. The potential difference and distance before the test heads #1 and #3 are read by the display screen 6, and the potential difference and distance between the test heads #2 and #4 are read by the display screen 25, so that the soil ground potential gradient can be directly calculated.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicants be construed as having contemplated such subject matter as being part of the disclosed subject matter.
Claims (6)
1. The device for measuring the stray current of the soil near the buried pipeline is characterized by comprising a central panel (1), wherein at least two test rods are arranged at the bottom of the central panel (1) and are arranged oppositely; the testing rod is hinged with the central panel (1) and can be folded along the hinged part, and the testing rod is of a telescopic structure;
the surface of the central panel (1) is provided with a telescopic cable (9) and an alligator clip (7) used for being connected with a pipeline or a pipeline measuring lead, one end of the telescopic cable (9) is electrically connected with the central panel (1), and the other end of the telescopic cable is connected with the alligator clip (7); the surface of the central panel (1) is provided with a potential difference display screen (8); a direct current/alternating current conversion knob (26) is arranged on the surface of the central panel (1), and an internal circuit of the potential difference display screen (8) is electrically connected with the crocodile clip (7) and the test head for displaying direct current potential difference and alternating current potential difference;
and at least one test rod is provided with a display screen for displaying the actual distance and the potential difference between the two test heads.
2. A device for measuring stray current of soil near a buried pipeline according to claim 1,
the test rod comprises a first-stage test rod, a second-stage test rod is sleeved in the first-stage test rod, a third-stage test rod is sleeved in the second-stage test rod, and a test head is arranged at the tail end of the third-stage test rod; the first-stage test rod, the second-stage test rod and the third-stage test rod form a telescopic structure.
3. A device for measuring stray current of soil near a buried pipeline according to claim 1,
the test head comprises a stainless steel reference electrode protective shell (22), a saturated copper sulfate reference electrode (23) and a protective shell top cover plate (24); the stainless steel reference electrode protective shell (22) is arranged at the bottom of a cover plate (24) at the top of the protective shell, the saturated copper sulfate reference electrode (23) is arranged in the stainless steel reference electrode protective shell (22), and a round hole is formed in the bottom of the stainless steel reference electrode protective shell (22); the saturated copper sulfate reference electrode (23) is electrically connected with the display screen.
4. A device for measuring stray current of soil near a buried pipeline according to claim 3,
the diameter of the round hole is consistent with that of the saturated copper sulfate reference electrode (23).
5. A device for measuring stray current of soil near a buried pipeline according to claim 3,
the stainless steel reference electrode protective shell (22) is conical.
6. A device for measuring stray current of soil near a buried pipeline according to claim 1,
four testing rods are arranged at the bottom of the central panel (1), and the four first-level testing rods are distributed at 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122606291.7U CN216209428U (en) | 2021-10-27 | 2021-10-27 | Device for measuring stray current of soil near buried pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122606291.7U CN216209428U (en) | 2021-10-27 | 2021-10-27 | Device for measuring stray current of soil near buried pipeline |
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| CN216209428U true CN216209428U (en) | 2022-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616281A (en) * | 2022-10-21 | 2023-01-17 | 广州普迩太科技有限公司 | uDL2 stray current tester and detection method thereof |
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2021
- 2021-10-27 CN CN202122606291.7U patent/CN216209428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616281A (en) * | 2022-10-21 | 2023-01-17 | 广州普迩太科技有限公司 | uDL2 stray current tester and detection method thereof |
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