CN213023600U - Buried metal conductor accurate positioning detector - Google Patents
Buried metal conductor accurate positioning detector Download PDFInfo
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- CN213023600U CN213023600U CN202022472414.8U CN202022472414U CN213023600U CN 213023600 U CN213023600 U CN 213023600U CN 202022472414 U CN202022472414 U CN 202022472414U CN 213023600 U CN213023600 U CN 213023600U
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- 239000004020 conductor Substances 0.000 title claims abstract description 51
- 239000002184 metal Substances 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000002955 isolation Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model provides an accurate positioning detector for an underground metal conductor, which belongs to the technical field of metal detection and comprises a pilot frequency power supply, an isolation transformer, a detection coil, a handheld detector and a connecting wire; the pilot frequency power supply is used for generating voltage different from power frequency; the input end of the isolation transformer is connected with the pilot frequency power supply and used for reducing the output voltage of the pilot frequency power supply to a safe range; the connecting wire is used for connecting the output end of the isolation transformer and the buried conductor to be tested; the detection coil is in signal connection with the handheld detector. The utility model can detect the buried conductor under the working condition of strong interference such as transformer substation and power plant by loading the pilot frequency current on the buried conductor to be detected; the utility model discloses can realize burying metallic conductor's accurate positioning to ground, can accurate positioning to being surveyed directly over the conductor to reduce the task volume of follow-up work, practice thrift manpower and materials.
Description
Technical Field
The utility model belongs to the technical field of the metal is surveyed, concretely relates to bury metallic conductor accurate positioning detector.
Background
Before excavation or other construction work is performed at buried cables, metal pipes or conductors, the location of these buried pipelines needs to be accurately determined to avoid being damaged by excavation during construction. In this case, a number of instruments have emerged for detecting underground conductors.
The utility model with the publication number of CN208060733U proposes a detection device for deeply buried metal pipeline, which comprises a transmitter and a receiver on the ground of the metal pipeline, and a signal enhancement device connected with the transmitter, wherein the signal enhancement device comprises a transmitting frame and a power supply line, the power supply line is connected with the transmitter and forms a closed loop with the transmitting frame; the transmitting frame is arranged on the ground above the metal pipeline in a separated mode, and transmitting signals transmitted by the transmitter to the metal pipeline in an enhanced mode; the receiver is arranged outside the transmitting frame and tracks and detects the feedback signal of the metal pipeline outwards. The utility model discloses a through the electromagnetic wave signal to underground metal pipeline transmission specific frequency, the electromagnetic signal that the detection instrument detected the metal pipeline feedback comes survey to bury the position of ground pipeline.
Another conventional metal detector utilizes a coil through which alternating current passes, the coil being capable of generating a rapidly changing magnetic field which induces eddy currents in the metal object, the eddy currents in turn generating a magnetic field which adversely affects the original magnetic field and causes the detector to generate a beep. The accuracy and reliability of the detector depend on the frequency stability of the electromagnetic transmitter, the sensitivity is reduced along with the increase of the detection range, and the magnitude of the induction signal depends on the conductivity of the buried conductor to be detected.
However, the conventional detection method can only carry out rough positioning on the buried conductor, has poor positioning precision and weak anti-interference capability, and cannot effectively detect the buried conductor under the working conditions of strong interference of a transformer substation, a power plant and the like. Problems of undetected or inaccurately positioned surfaces also arise when encountering metallic conductors that are less prone to eddy currents. Therefore, it is necessary to invent an apparatus capable of accurately detecting the buried conductor.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an to the not enough of prior art, bury metallic conductor accurate positioning detector, bury the conductor with can accurately surveying.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: an accurate positioning detector for an underground metal conductor comprises a pilot frequency power supply, an isolation transformer, a detection coil, a handheld detector and a connecting wire; the pilot frequency power supply is used for generating voltage different from power frequency; the input end of the isolation transformer is connected with the pilot frequency power supply and used for reducing the output voltage of the pilot frequency power supply to a safe range; the connecting wire is used for connecting the output end of the isolation transformer and the buried conductor to be tested; the detection coil is in signal connection with the handheld detector.
Furthermore, the connecting wire comprises a first wire and a second wire, the first wire is used for connecting the first output end of the isolation transformer and the first end of the buried conductor to be tested, and the second wire is used for connecting the second output end of the isolation transformer and the second end of the buried conductor to be tested.
Furthermore, the output voltage and the output frequency of the pilot frequency power supply are adjustable.
Further, the receiving frequency of the handheld detector is adjustable.
Furthermore, the handheld detector and the detection coil are connected through a connecting rod, and a handle convenient to hold and an arm support used for fixing an arm are arranged on the connecting rod.
Furthermore, the adjustable range of the output voltage of the pilot frequency power supply is 0-200V, and the adjustable range of the output frequency is 30-100 Hz.
Furthermore, the receiving frequency of the handheld detector can be adjusted within the range of 30-100 Hz.
The utility model has the advantages as follows:
the utility model can detect the buried conductor under the working condition of strong interference such as transformer substation and power plant by loading the pilot frequency current on the buried conductor to be detected; the utility model can realize the accurate detection of the metal conductor which is not easy to generate the eddy current; the utility model can adjust the working frequency of the pilot frequency power supply and the handheld detector during working, and can avoid the electromagnetic frequency which can cause interference around, thereby improving the accuracy of detection; the utility model has strong anti-interference performance and can reliably work in complex electromagnetic environment; the utility model fixes the hand-held detector and the detection coil by the connecting rod, and the connecting rod is provided with the handle and the arm support, so that the physical strength of the staff is saved when the hand-held detector and the detection coil are used, and the field work efficiency can be improved; the utility model discloses can realize burying metallic conductor's accurate positioning to ground, can accurate positioning to being surveyed directly over the conductor to reduce the task volume of follow-up work, practice thrift manpower and materials.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1: the structure of the utility model is schematically shown.
FIG. 2: the utility model discloses embodiment 2's structural schematic.
The device comprises a power supply 1, a pilot frequency power supply 2, an isolation transformer 3, a handheld detector 4, a detection coil 5, a connecting wire 51, a first wire 52, a second wire 52, a ground-buried conductor 6, a connecting rod 7, a handle 71 and an arm support 72.
Detailed Description
For a better understanding of the present invention, the following embodiments and the accompanying drawings are used to further clarify the content of the present invention, but the protection of the present invention is not limited to the following embodiments. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
Example 1:
as shown in fig. 1, the utility model comprises a pilot frequency power supply 1, an isolation transformer 2, a handheld detector 3, a detection coil 4 and a connecting wire 5. The pilot frequency power supply 1 is used for generating voltage different from power frequency (50 Hz/60 Hz), and the output voltage and the frequency are adjustable; the isolation transformer 2 is used for reducing the output voltage of the pilot frequency power supply 1 to a safe range, and the input end of the isolation transformer 2 is connected with the output end of the pilot frequency power supply 1 through a wire; the connecting wire 5 is used for loading the output voltage of the isolation transformer 2 on the buried conductor 6 to be tested, and comprises a first wire 51 and a second wire 52, wherein the first wire 51 is used for connecting the first output end of the isolation transformer 2 and the first end of the buried conductor 6 to be tested, and the second wire 52 is used for connecting the second output end of the isolation transformer 2 and the second end of the buried conductor 6 to be tested.
The detection coil 4 is used for inducing the pilot frequency current on the buried conductor 6 and generating an induced current inside the coil; the handheld detector 3 is in signal connection with the detection coil 4, the induced current of the detection coil 4 is filtered and calculated, and the current reading is larger when the detection coil 4 is closer to the buried conductor 6; the receiving frequency of the hand-held probe 3 is adjustable.
In the specific implementation process of the embodiment, the adjustable range of the output voltage of the pilot frequency power supply 1 is 0-200V, and the adjustable range of the output frequency is 30-100 Hz; the isolation transformer 2 can reduce the input voltage of 0-200V to 0-3V; the adjustable range of the receiving frequency of the hand-held detector 3 is 30-100 Hz.
When the utility model works, firstly, the isolation transformer 2 is connected with the two ends of the buried conductor 6 by the connecting wires 5; then starting the pilot frequency power supply 1, and setting the output voltage and the output frequency of the pilot frequency power supply 1; whether current passes through the connecting lead 5 is tested by using a pincerlike ammeter, and if the current passes through the connecting lead, the conduction of the buried conductor 6 is proved to be normal, so that a next step of test can be carried out; connecting the detection coil 4 with the handheld detector 3, turning on a power supply of the handheld detector 3, and setting the receiving frequency of the handheld detector 3 to be consistent with the output frequency of the pilot frequency power supply 1; and then, according to the approximate trend of the underground conductor 6, enabling the plane of the detection coil 4 to be parallel to the walking direction of the underground conductor 6, if the handheld detector 3 has readings, keeping the walking direction of the plane of the detection coil 4 and the walking direction of the underground conductor 6 unchanged, moving the detection coil 4 left and right, and finding a maximum reading point, wherein the maximum reading point is the position right above the detected underground conductor 6. By this method, the orientation of the buried conductor 6 can be determined.
In the detection process, if the reading number of the handheld detector 3 is found to be small or no induced current can be detected, but the clamp-on ammeter can detect that the current flows on the connecting wire 5, the output voltage of the pilot frequency power supply 1 can be increased, so that the voltage loaded at two ends of the detected buried conductor 6 is increased, and a larger pilot frequency current is generated for detection.
If the surrounding electromagnetic environment is complex, the frequency of the pilot frequency power supply 1 and the handheld detector 3 can be adjusted when the surrounding electromagnetic field influences detection, and other electromagnetic frequencies in the environment are avoided, so that the detection accuracy is improved.
Example 2:
as shown in fig. 2, the main difference between this embodiment and embodiment 1 is: the hand-held detector 3 and the detection coil 4 are connected through a connecting rod 7, and a handle 71 convenient to hold and an arm support 72 used for fixing an arm are arranged on the connecting rod 7.
This embodiment is with fixed handheld detector 3 of connecting rod 7 and detection coil 4 to be provided with handle 71 and arm support 72 on the connecting rod 7, adopt this structure can make handheld detector 3 and detection coil 4 portable, will more save physical power when using, thereby can improve on-the-spot work efficiency.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an accurate positioning detector of buried metal conductor which characterized in that: the device comprises a pilot frequency power supply, an isolation transformer, a detection coil, a handheld detector and a connecting wire; the pilot frequency power supply is used for generating voltage different from power frequency; the input end of the isolation transformer is connected with the pilot frequency power supply and used for reducing the output voltage of the pilot frequency power supply to a safe range; the connecting wire is used for connecting the output end of the isolation transformer and the buried conductor to be tested; the detection coil is in signal connection with the handheld detector.
2. The buried metal conductor accurate positioning detector of claim 1, wherein: the connecting wire comprises a first wire and a second wire, the first wire is used for connecting the first output end of the isolation transformer and the first end of the buried conductor to be tested, and the second wire is used for connecting the second output end of the isolation transformer and the second end of the buried conductor to be tested.
3. The buried metal conductor accurate positioning detector of claim 1, wherein: the output voltage and the output frequency of the pilot frequency power supply are adjustable.
4. The buried metal conductor accurate positioning detector of claim 1, wherein: the receiving frequency of the handheld detector is adjustable.
5. The buried metal conductor accurate positioning detector of claim 1, wherein: the handheld detector and the detection coil are connected through a connecting rod, and a handle convenient to hold and an arm support used for fixing an arm are arranged on the connecting rod.
6. The buried metal conductor accurate positioning detector of claim 3, wherein: the adjustable range of the output voltage of the pilot frequency power supply is 0-200V, and the adjustable range of the output frequency is 30-100 Hz.
7. The buried metal conductor accurate positioning detector of claim 4, wherein: the adjustable range of the receiving frequency of the handheld detector is 30-100 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022472414.8U CN213023600U (en) | 2020-10-30 | 2020-10-30 | Buried metal conductor accurate positioning detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022472414.8U CN213023600U (en) | 2020-10-30 | 2020-10-30 | Buried metal conductor accurate positioning detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213023600U true CN213023600U (en) | 2021-04-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022472414.8U Active CN213023600U (en) | 2020-10-30 | 2020-10-30 | Buried metal conductor accurate positioning detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213023600U (en) |
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2020
- 2020-10-30 CN CN202022472414.8U patent/CN213023600U/en active Active
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