Current test pile wiring distinguishing device for pipeline

Abstract

According to the current test pile wiring distinguishing device for the pipeline provided by the utility model, since the measured potential is expanded by the voltage amplifier and the measured data can be synchronously displayed, the current pile wiring can be rapidly and accurately distinguished at low cost even if stray current interference exists on site. The device is suitable for stray current interference pipe sections, and current test piles can be distinguished quickly and accurately at low cost.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a current test pile wiring differentiation device for pipelines. Background Art

[0002] In the early stage of pipeline construction, a large number of current test piles were set up for large-scale pipeline crossings or high-risk areas along the line. During use, it was found that the wiring labels of the four pipelines in some current test piles were aged or due to other reasons, making the four pipeline lines indistinguishable. At present, there is no effective means of distinction except excavation verification, resulting in many current test piles being unable to be used normally.

[0003] For pipe sections where conventional means cannot be used to evaluate the quality of the pipeline anti-corrosion layer, such as large crossing sections, current test piles will be designed and installed at both ends of the crossing section in the initial stage of construction to measure the current in the pipe and evaluate the quality of the anti-corrosion layer.

[0004] On the one hand, the testing and use process of the current pile is complicated, which can easily lead to wiring confusion. On the other hand, due to the high requirements of the testing technology, the current test piles are used and maintained less frequently, and the internal wiring labels of many current test piles are not maintained in a timely manner. Since the four wires are directly connected to the pipeline, if the quality of the anti-corrosion layer is good, the potential difference between the four pipeline lines is small. If the potential difference between the two wires is used on site, the wiring cannot be effectively distinguished, especially when there is small stray current interference around, it is even more difficult to distinguish the wiring. Utility Model Content

[0005] The utility model aims to provide a pipeline current test pile wiring differentiation device which overcomes the above problems or at least partially solves the above problems.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is specifically implemented as follows:

[0007] The utility model provides a pipeline current test pile wiring differentiation device, comprising: a terminal, a three-pole double-throw switch, a voltage acquisition device, a voltage amplifier and a voltmeter; wherein:

[0008] The binding posts include: a first binding post, a second binding post, a third binding post and a fourth binding post;

[0009] The three-pole double-throw switch comprises: a first fixed contact, a second fixed contact and a moving contact, the first fixed contact comprises a first fixed first contact, a first fixed second contact and a first fixed third contact, the second fixed contact comprises: a second fixed first contact, a second fixed second contact and a second fixed third contact, the moving contact comprises: a first moving contact, a second moving contact and a third moving contact;

[0010] The voltage collection device comprises: a first voltage collection device, a second voltage collection device and a third voltage collection device;

[0011] The voltage amplifier comprises: a first voltage amplifier, a second voltage amplifier and a third voltage amplifier;

[0012] The voltmeter includes: a first voltmeter, a second voltmeter and a third voltmeter;

[0013] The first terminal is respectively connected to the first fixed first contact, the first fixed second contact and the first fixed third contact of the three-pole double-throw switch, and the second fixed third contact of the three-pole double-throw switch; the positive electrode of the first voltage acquisition device is connected to the third moving contact of the three-pole double-throw switch, and the negative electrode is connected to the second terminal, for testing the DC potential between the first terminal and the second terminal;

[0014] The second terminal is connected to the second fixed second contact of the three-pole double-throw switch, the positive electrode of the second voltage acquisition device is connected to the second moving contact of the three-pole double-throw switch, and the negative electrode is connected to the third terminal; when the three-pole double-throw switch is located on the first side, the DC potential between the first terminal and the third terminal is measured, and when the three-pole double-throw switch is located on the second side, the DC potential between the second terminal and the third terminal is measured;

[0015] The third terminal is connected to the second fixed third contact of the three-pole double-throw switch, the positive electrode of the third voltage acquisition device is connected to the first moving contact of the three-pole double-throw switch, and the negative electrode is connected to the fourth terminal; when the three-pole double-throw switch is located on the first side, the DC potential between the first terminal and the fourth terminal is measured, and when the three-pole double-throw switch is located on the second side, the DC potential between the third terminal and the fourth terminal is measured;

[0016] The first voltage amplifier is used to amplify the DC potential signal collected by the first voltage acquisition device and display it through the first voltmeter; the second voltage amplifier is used to amplify the DC potential signal collected by the second voltage acquisition device and display it through the second voltmeter; the third voltage amplifier is used to amplify the DC potential signal collected by the third voltage acquisition device and display it through the third voltmeter.

[0017] Wherein, the first voltmeter, the second voltmeter and the third voltmeter are pointer-type voltmeters.

[0018] Among them, when the DC potential of the first voltmeter, the second voltmeter and the third voltmeter is negative, the pointers are biased to the left, and when the DC potential is positive, the pointers are biased to the right.

[0019] The pointer-type voltmeter has a gear adjustment function, and when the pointer is deflected to a value greater than the measuring range, the gear is adjusted.

[0020] It can be seen that the pipeline current test pile wiring differentiation device provided by the utility model can quickly, accurately and cost-effectively differentiate the wiring in the current test pile, and is suitable for current test piles near stray current interference pipe sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a pipeline current test pile wiring differentiation device provided in an embodiment of the utility model.

[0023] Figure 2 A schematic diagram of the internal wiring of a current test pile provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] Figure 1 The schematic diagram of the structure of the current test pile wiring differentiation device for pipelines provided by the embodiment of the utility model is shown. Figure 1 The pipeline current test pile wiring differentiation device provided by the embodiment of the utility model includes: a terminal, a three-pole double-throw switch, a voltage acquisition device, a voltage amplifier and a voltmeter; wherein:

[0026] The binding posts include: a first binding post, a second binding post, a third binding post and a fourth binding post;

[0027] The three-pole double-throw switch comprises: a first fixed contact, a second fixed contact and a moving contact, the first fixed contact comprises a first fixed first contact, a first fixed second contact and a first fixed third contact, the second fixed contact comprises: a second fixed first contact, a second fixed second contact and a second fixed third contact, and the moving contact comprises: a first moving contact, a second moving contact and a third moving contact;

[0028] The voltage collection device includes: a first voltage collection device, a second voltage collection device and a third voltage collection device;

[0029] The voltage amplifier includes: a first voltage amplifier, a second voltage amplifier and a third voltage amplifier;

[0030] The voltmeter includes: a first voltmeter, a second voltmeter and a third voltmeter;

[0031] The first terminal is respectively connected to the first fixed first contact, the first fixed second contact and the first fixed third contact of the three-pole double-throw switch, and the second fixed third contact of the three-pole double-throw switch; the positive pole of the first voltage acquisition device is connected to the third moving contact of the three-pole double-throw switch, and the negative pole is connected to the second terminal, for testing the DC potential between the first terminal and the second terminal;

[0032] The second terminal is connected to the second fixed second contact of the three-pole double-throw switch, the positive pole of the second voltage acquisition device is connected to the second moving contact of the three-pole double-throw switch, and the negative pole is connected to the third terminal; when the three-pole double-throw switch is located on the first side, the DC potential between the first terminal and the third terminal is measured, and when the three-pole double-throw switch is located on the second side, the DC potential between the second terminal and the third terminal is measured;

[0033] The third terminal is connected to the second fixed third contact of the three-pole double-throw switch, the positive pole of the third voltage acquisition device is connected to the first moving contact of the three-pole double-throw switch, and the negative pole is connected to the fourth terminal; when the three-pole double-throw switch is located on the first side, the DC potential between the first terminal and the fourth terminal is measured, and when the three-pole double-throw switch is located on the second side, the DC potential between the third terminal and the fourth terminal is measured;

[0034] The first voltage amplifier is used to amplify the DC potential signal collected by the first voltage acquisition device and display it through the first voltmeter; the second voltage amplifier is used to amplify the DC potential signal collected by the second voltage acquisition device and display it through the second voltmeter; the third voltage amplifier is used to amplify the DC potential signal collected by the third voltage acquisition device and display it through the third voltmeter.

[0035] Specifically, the wiring inside the current test pile is as follows: Figure 2 As shown, the current test pile consists of 4 pipelines, namely a, c, d, and b. ac ≥πD,L db ≥πD,L cd ≥10m.

[0036] Define pipeline lines a and c as "left-side wiring", and pipelines d and b as "right-side wiring"; define line a as the "far-end" wiring of "left-side wiring", line c as the "near-end" wiring of "left-side wiring", line b as the "far-end" of "right-side wiring", and line d as the "near-end" wiring of "right-side wiring".

[0037] The utility model can distinguish four pipeline lines.

[0038] As an optional implementation of the embodiment of the utility model, the first voltmeter, the second voltmeter and the third voltmeter are pointer-type voltmeters.

[0039] As an optional implementation of the embodiment of the utility model, when the DC potential of the first voltmeter, the second voltmeter and the third voltmeter is negative, the pointer is biased to the left, and when the DC potential is positive, the pointer is biased to the right.

[0040] As an optional implementation of the embodiment of the utility model, the pointer voltmeter has a gear adjustment function, and the gear is adjusted when the pointer is deflected to a value greater than the measuring range.

[0041] For specific implementation, see Figure 1 The terminal 1-1 is connected to 2-6, 2-7, 2-8, and 2-9 which are respectively connected to the three-pole double-throw switch; the positive pole of the voltage acquisition device 3-1 is connected to 2-3 of the three-pole double-throw switch, and the negative pole is connected to the terminal 1-2, which is used to test the DC potential between the terminals 1-1 and 1-2.

[0042] The terminal 1-2 is connected to the 2-5 of the three-pole double-throw switch, the positive pole of the voltage acquisition device 3-2 is connected to the 2-2 of the three-pole double-throw switch, and the negative pole is connected to the terminal 1-3. When the three-pole double-throw switch is on the left, the DC potential between the terminal 1-1 and the terminal 1-3 is measured, and when the three-pole double-throw switch is on the right, the DC potential between the terminal 1-2 and the terminal 1-3 is measured.

[0043] The terminal 1-3 is connected to the 2-4 of the three-pole double-throw switch, the positive pole of the voltage acquisition device 3-3 is connected to the 2-1 of the three-pole double-throw switch, and the negative pole is connected to the terminal 1-4. When the three-pole double-throw switch is on the left side, the DC potential between the terminal 1-1 and the terminal 1-4 is measured, and when the three-pole double-throw switch is on the right side, the DC potential between the terminal 1-3 and the terminal 1-4 is measured.

[0044] The voltage amplifier 4 amplifies the DC potential signal collected by the voltage collection device 3 and displays it through the pointer voltmeter 5. When the DC potential is negative, the pointer deviates to the left, and when the DC potential is positive, the pointer deviates to the right.

[0045] The pointer type voltmeter 5 has a gear adjustment function. When the pointer is more positive than the measuring range, the gear is adjusted.

[0046] It can be seen that, through the pipeline current test pile wiring differentiation device provided by the embodiment of the utility model, since the measured potential is amplified by the voltage amplifier and the measured data can be displayed synchronously, even if there is stray current interference on site, the current pile wiring can be quickly, accurately and at low cost. The utility model is suitable for stray current interference pipe sections, and can quickly, accurately and at low cost distinguish current test piles.

[0047] A method for distinguishing the wiring of a current test pile for a pipeline is provided below. The method for distinguishing the wiring of a current test pile for a pipeline is implemented by using the above-mentioned device. The following is only a brief description of the method for distinguishing the wiring of a current test pile for a pipeline. For other matters not covered, please refer to the relevant description in the above-mentioned device for distinguishing the wiring of a current test pile for a pipeline. The method for distinguishing the wiring of a current test pile for a pipeline provided by the embodiment of the utility model includes:

[0048] Confirm that the current test pile wiring is intact;

[0049] Set the three-pole double-throw switch to the off state, randomly select a pipeline line from the current test pile and connect it to the first terminal, and randomly select another three pipeline lines and connect them to the second terminal, the third terminal and the fourth terminal respectively;

[0050] Adjust the three-pole double-throw switch to connect the three-pole double-throw switch to the first fixed first contact, the first fixed second contact, and the first fixed third contact, collect the DC potential between the first terminal and the second terminal, the first terminal and the third terminal, and the first terminal and the fourth terminal, and record it as V 12 、V 13 、V 14 ;

[0051] Compare the voltage values ​​by using the first voltmeter, the second voltmeter and the third voltmeter; and determine that the two binding posts corresponding to a group of data with a smaller voltage value are connected on one side, and the two binding posts corresponding to the two groups of data with a larger voltage value are connected on the other side;

[0052] Restore the three-pole double-throw switch to the disconnected state;

[0053] Connect one of the wirings on one side to the second terminal, connect another of the wirings on one side to the first terminal, connect one of the wirings on the other side to the third terminal, and connect another of the wirings on the other side to the fourth terminal;

[0054] The near end and the far end are determined by comparing the directions of the second voltmeter with the first voltmeter and the second voltmeter with the third voltmeter.

[0055] As an optional implementation of the embodiment of the utility model, confirming that the wiring is intact includes: using a ground resistance tester to measure the ground resistance of the four wires in the current test pile respectively, and confirming that the wiring of the four wires in the current test pile is intact.

[0056] As an optional implementation of the embodiment of the utility model, judging the near end and the far end according to the direction of comparing the second voltmeter with the first voltmeter and the second voltmeter with the third voltmeter includes:

[0057] If the first voltmeter and the second voltmeter are in the same direction, the first terminal corresponds to the far end of the wiring on one side, and the second terminal corresponds to the near end of the wiring on one side;

[0058] If the first voltmeter and the second voltmeter are in opposite directions, the first terminal corresponds to the near end of the wiring on one side, and the second terminal corresponds to the far end of the wiring on one side;

[0059] If the third voltmeter is in the same direction as the second voltmeter, the fourth terminal corresponds to the far end of the wiring on the other side, and the third terminal corresponds to the near end of the wiring on the other side;

[0060] If the third voltmeter is in the opposite direction to the second voltmeter, the fourth terminal corresponds to the near end of the wiring on the other side, and the third terminal corresponds to the far end of the wiring on the other side.

[0061] As an optional implementation of the embodiment of the utility model, the method for distinguishing the wiring of the current test pile for pipelines provided by the embodiment of the utility model also includes: verifying the determined proximal end and distal end. Specifically, verifying the determined proximal end and distal end includes: the distal end of the wiring on one side, the proximal end of the wiring on one side, the proximal end of the wiring on the other side, and the distal end of the wiring on the other side are connected to the first terminal, the second terminal, the third terminal, and the fourth terminal in sequence; determining that the directions of the first voltmeter, the second voltmeter, and the third voltmeter should be consistent, and the values ​​of the first voltmeter and the third voltmeter are close, and the value of the second voltmeter is the largest.

[0062] In specific implementation, the test methods for distinguishing wiring include:

[0063] 1) Confirm that the wiring is intact. Use a ground resistance tester to measure the ground resistance of the four wires respectively to confirm that the wiring of the four wires is intact.

[0064] 2) Ensure that the switch is in the off state, randomly select a pipeline line and connect it to terminal 1-1, and randomly select another 3 pipeline lines and connect them to terminals 1-2, 1-3, and 1-4 respectively. Adjust the three-pole double-throw switch to ensure that the switch is connected to 2-7, 2-8, and 2-9, and collect the DC potential between terminals 1-1 and 1-2, terminals 1-1 and 1-3, and terminals 1-1 and 1-4, which are V 12 、V 13 、V14 ; Use the pointer voltmeter to visually compare the voltage values. The two terminals corresponding to the group of data with smaller voltage values ​​are wired on one side, and the two terminals corresponding to the two groups of data with larger voltage values ​​are wired on the other side, such as |V 12 |<|V 13 |≈|V 14 |, the wiring corresponding to terminals 1-1 and 1-2 is "left wiring", and the wiring corresponding to terminals 1-3 and 1-4 is "right wiring". Restore the switch to the off state.

[0065] 3) According to the "left wiring" and "right wiring" determined in step 2), select the "left wiring" to connect to terminal 1-2, and select the "right wiring" to connect to terminal 1-3. Select another wire of the "left wiring" to connect to terminal 1-1, and select another wire of the "right wiring" to connect to terminal 1-4. Determine the near end and far end by comparing the directions of pointer voltmeters 5-2 and 5-1, and 5-2 and 5-3. The determination method is as follows:

[0066] a) If 5-1 and 5-2 are in the same direction, terminal 1-1 corresponds to the "far end" of "left wiring", and terminal 1-2 corresponds to the "near end" of "left wiring".

[0067] b) If 5-1 and 5-2 are in opposite directions, terminal 1-1 corresponds to the "near end" of the "left wiring", and terminal 1-2 corresponds to the "far end" of the "left wiring".

[0068] c) Similarly, determine whether the directions of 5-3 and 5-2 are consistent. If they are consistent, the terminal 1-4 corresponds to the "far end" of the "right side wiring"; otherwise, the terminal 1-4 corresponds to the "near end" of the "right side wiring".

[0069] 4) Verify that according to the wiring distinguished in the above steps, the "far end" of the "left wiring", "near end" of the "left wiring", "near end" of the "right wiring", and "far end" of the "right wiring" are connected to the terminals 1-1, 1-2, 1-3, and 1-4 in turn. At this time, the directions of the pointer voltmeters 5-1, 5-2, and 5-3 should be consistent, and the values ​​of 5-1 and 5-3 should be close, with 5-2 having the largest value.

[0070] It can be seen that, through the pipeline current test pile wiring distinction method provided by the embodiment of the utility model, since the measured potential is amplified by the voltage amplifier and the measured data can be displayed synchronously, even if there is stray current interference on site, the current pile wiring can be distinguished quickly, accurately and at low cost. The utility model is suitable for stray current interference pipe sections, and can distinguish current test piles quickly, accurately and at low cost.

[0071] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A pipeline current test pile wiring differentiation device, characterized in that: include: Binding post, three-pole double-throw switch, voltage acquisition device, voltage amplifier and voltmeter; among which: The binding posts include: a first binding post, a second binding post, a third binding post and a fourth binding post; The three-pole double-throw switch comprises: a first fixed contact, a second fixed contact and a moving contact, the first fixed contact comprises a first fixed first contact, a first fixed second contact and a first fixed third contact, the second fixed contact comprises: a second fixed first contact, a second fixed second contact and a second fixed third contact, the moving contact comprises: a first moving contact, a second moving contact and a third moving contact; The voltage collection device comprises: a first voltage collection device, a second voltage collection device and a third voltage collection device; The voltage amplifier comprises: a first voltage amplifier, a second voltage amplifier and a third voltage amplifier; The voltmeter includes: a first voltmeter, a second voltmeter and a third voltmeter; The first terminal is respectively connected to the first fixed first contact, the first fixed second contact and the first fixed third contact of the three-pole double-throw switch, and the second fixed third contact of the three-pole double-throw switch; the positive electrode of the first voltage acquisition device is connected to the third moving contact of the three-pole double-throw switch, and the negative electrode is connected to the second terminal, for testing the DC potential between the first terminal and the second terminal; The second terminal is connected to the second fixed second contact of the three-pole double-throw switch, the positive electrode of the second voltage acquisition device is connected to the second moving contact of the three-pole double-throw switch, and the negative electrode is connected to the third terminal; when the three-pole double-throw switch is located on the first side, the DC potential between the first terminal and the third terminal is measured, and when the three-pole double-throw switch is located on the second side, the DC potential between the second terminal and the third terminal is measured; The third terminal is connected to the second fixed third contact of the three-pole double-throw switch, the positive electrode of the third voltage acquisition device is connected to the first moving contact of the three-pole double-throw switch, and the negative electrode is connected to the fourth terminal; when the three-pole double-throw switch is located on the first side, the DC potential between the first terminal and the fourth terminal is measured, and when the three-pole double-throw switch is located on the second side, the DC potential between the third terminal and the fourth terminal is measured; The first voltage amplifier is used to amplify the DC potential signal collected by the first voltage acquisition device and display it through the first voltmeter; the second voltage amplifier is used to amplify the DC potential signal collected by the second voltage acquisition device and display it through the second voltmeter; the third voltage amplifier is used to amplify the DC potential signal collected by the third voltage acquisition device and display it through the third voltmeter.

2. The pipeline current test pile wiring differentiation device according to claim 1, characterized in that: The first voltmeter, the second voltmeter and the third voltmeter are pointer-type voltmeters.

3. The pipeline current test pile wiring differentiation device according to claim 2, characterized in that: When the DC potential of the first voltmeter, the second voltmeter and the third voltmeter is negative, the pointers are deflected to the left, and when the DC potential is positive, the pointers are deflected to the right.

4. The pipeline current test pile wiring differentiation device according to claim 3, characterized in that: The pointer type voltmeter has a gear adjustment function, and when the pointer is deflected to a value greater than the measuring range, the gear is adjusted.

Images