CN110989003B - Electrode device, system and method for cross-hole CT test - Google Patents
Electrode device, system and method for cross-hole CT test Download PDFInfo
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- CN110989003B CN110989003B CN201911293265.4A CN201911293265A CN110989003B CN 110989003 B CN110989003 B CN 110989003B CN 201911293265 A CN201911293265 A CN 201911293265A CN 110989003 B CN110989003 B CN 110989003B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields
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Abstract
The invention discloses an electrode device, a system and a method for cross-hole CT (computed tomography) test, which solve the problems of difficult replacement, inconvenient carrying and high cost after an electrode is damaged in the prior art, increase the flexibility of electrode combination while being convenient to carry, ensure the stability of the structure and improve the signal quality; the technical scheme is as follows: the electrode fixing device comprises a dentate electrode and a bent lead, wherein the dentate electrode is arranged on the outer side of the electrode fixing device, and a sealing tube is inserted into the inner side of the electrode fixing device; the two ends of the bent conducting wire are respectively provided with an exposed contact piece, the exposed contact piece at one end of the bent conducting wire extends out of the end part of the sealing tube, and the bent conducting wire bypasses the electrode fixing device to enable the other end of the bent conducting wire to be connected with the toothed electrode through the exposed contact piece.
Description
Technical Field
The invention relates to the technical field of exploration, in particular to an electrode device, a system and a method for cross-hole CT (computed tomography) test.
Background
The cross-hole CT test is an important geological survey method, and the cross-hole test by using an ultra-high density electrical method instrument is a commonly used method. In the test process, two measuring lines with electrodes are placed in two geological holes which are drilled in advance, and the measuring lines are electrified to build artificial direct current electric fields at different depths of the stratum, so that the geological structure of the stratum is explored.
The electrode is an indispensable part in a cross-hole CT test by using an ultra-high density electrical method, and the inventor finds that the required electrodes with different numbers and measuring wires are integrally processed by the current popular equipment on the market, but the cables are required to be reset according to the number of the electrodes actually required by the test in each test, so that the manufacturing cost is high, the electrodes are difficult to replace if damaged, and the carrying is inconvenient.
Disclosure of Invention
In order to overcome the defects of the prior art, the first object of the invention is to provide an electrode device for cross-hole CT test, which has the effects of simple structure, portability and high precision.
The second purpose of the invention is to provide a system for cross-hole CT test, which has high flexibility of electrode unit combination and ensures the stability of the structure.
The third purpose of the invention is to provide a manufacturing method of the electrode device for the cross-hole CT test, which is convenient to operate, low in cost and capable of being rapidly assembled according to the number of electrodes required by the test.
The invention adopts the following technical scheme:
an electrode device for cross-hole CT tests comprises a toothed electrode and a bent lead, wherein the toothed electrode is arranged on the outer side of an electrode fixing device, and a sealing tube is inserted into the inner side of the electrode fixing device;
the two ends of the bent conducting wire are respectively provided with an exposed contact piece, the exposed contact piece at one end of the bent conducting wire extends out of the end part of the sealing tube, and the bent conducting wire bypasses the electrode fixing device to enable the other end of the bent conducting wire to be connected with the toothed electrode through the exposed contact piece.
Furthermore, the cross section of the tooth-shaped electrode is a circular ring, and the outer side of the circular ring is provided with a tooth-shaped structure.
Furthermore, the dentate electrode is provided with a non-through hole along the axis direction for matching with the exposed contact piece.
Furthermore, grooves for fixing the bent conducting wires are formed in the electrode fixing device and the inner side of the sealing tube respectively.
Further, the sealing pipe is internally provided with a bolt hole used for installing a bolt so as to connect the bent lead with an adjacent lead.
Furthermore, one end of the bent wire is vertical, and the other end of the bent wire is provided with two U-shaped corners.
Further, the sealing tube is inserted into the electrode fixing device to a set depth.
A system for cross-hole CT test comprises a plurality of electrode devices, wherein adjacent electrode devices are connected through bent leads; the tail part of the electrode device positioned at the head end is sleeved with a sealing sleeve, and the electrode device positioned at the tail end is connected with the ultrahigh-density electrical method instrument through a bent wire.
Furthermore, adjacent bent wires are connected inside the sealing tube through bolts.
A manufacturing method of an electrode device for cross-hole CT test comprises the following steps:
manufacturing sealing tubes and bent wires with different lengths and numbers;
fixing the toothed electrode outside the electrode fixing device, clamping the front end of the bent lead in a groove of the electrode fixing device, and inserting the sealing tube into the electrode fixing device;
the tail end of the bent lead extends out of the sealing pipe and is embedded in the groove in the sealing pipe to form an electrode unit.
Compared with the prior art, the invention has the beneficial effects that:
(1) the electrode structure is optimized and improved, the electrode device is not easy to deform under the action of water pressure in the using process, the contact surface area of the electrode is increased, the injection of current is facilitated, the signal quality is improved, and the efficiency and the accuracy of a cross-hole CT test are greatly improved;
(2) the portable electrode assembly is convenient to carry, the flexibility of the electrode assembly is improved, the number of electrode units can be freely increased or reduced, and the stability of the structure is ensured;
(3) the invention adopts PVC material, effectively meets the waterproof requirement of the electrode, reduces the manufacturing cost and is suitable for various hydrogeological conditions.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a front view of a first embodiment of the present invention;
FIG. 2 is a side view of a first embodiment of the present invention;
FIG. 3 is a front view of an electrode fixing apparatus according to an embodiment of the present invention;
FIG. 4 is a side view of an electrode holding apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an electrode according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a bending type conducting wire according to an embodiment of the invention;
FIG. 7 is a schematic view of the connection between a wire, a sealing tube, and a fixing device according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram according to a second embodiment of the present invention;
the electrode comprises 1 a dentate electrode, 2 an electrode fixing device, 3 a sealing tube, 4 a bent conducting wire, 5 a groove, 6 a non-through hole, 7 a bolt, 8 an exposed contact piece, 9 an abnormal body, 10 an electrode unit, 11 a sealing sleeve, 12 an adjacent bent conducting wire and 13 a ground.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected directly or indirectly through an intermediate medium, or the two components can be connected internally or in an interaction relationship, and the terms can be understood by those skilled in the art according to specific situations.
As introduced in the background art, the prior art has the defects of difficult replacement, inconvenient carrying and higher cost after the electrode is damaged, and the invention provides an electrode device, a system and a method for cross-hole CT test in order to solve the technical problems.
The first embodiment is as follows:
the present invention is described in detail below with reference to fig. 1 to 7, and specifically, the structure is as follows:
the implementation provides an electrode device for cross-hole CT test, which comprises a toothed electrode 1, an electrode fixing device 2, a sealing tube 3 and a bent type lead 4, wherein as shown in figures 1 and 2, the toothed electrode 1 is fixed on the outer side of the electrode fixing device 2, and the sealing tube 3 is inserted into the inner side of the electrode fixing device 2.
As shown in fig. 5, the cross section of the toothed electrode 1 is a circular ring, and the outer side of the circular ring has a toothed structure, that is: the inner side of the dentate electrode 1 is circular in section, and the outer side of the dentate electrode is provided with a plurality of tooth forms. And a non-through hole 6 for connecting the bending type lead 4 is formed in the eccentric position of the dentate electrode 1 along the axis direction. The toothed electrode 1 is made of stainless steel, so that the contact area of the electrode is increased under the condition of ensuring the hardness and the strength of the electrode, the current is fully injected into a medium when a high-density electrical method test between wells is carried out, and the signal-to-noise ratio is improved.
The electrode fixing device 2 is fixed on the inner side of the tooth-shaped electrode 1, as shown in fig. 3 and 4, the electrode fixing device 2 is integrally cylindrical, and the outer surface of the electrode fixing device 2 is provided with threads, so that the friction force is increased by the threads, and the tooth-shaped electrode 1 and the electrode fixing device 2 are firmly fixed.
The sealing tube 3 is inserted into the electrode fixture 2 to a certain depth without penetrating the electrode fixture 2. The sealing tube 3 plays a role of supporting the bending type wire 4, and simultaneously, the main body of the supporting bending type wire 4 is separated from the outside. The inner wall of the sealing tube 3 is provided with a groove for fixing the bending type conducting wire 4. And the lower part inside the sealing tube 3 is provided with a bolt hole for installing a bolt 7 so as to connect the bent lead 4 with an adjacent lead. The bent wire 4 and the adjacent wire can be easily connected through the bolt 7, the connection strength is high, and the installation and the operation are convenient. In this embodiment, the sealing tube 3 is made of a PVC material, which reduces the cost and increases the sealing performance.
As shown in fig. 6, the bent conductive wire 4 is a conductive wire with a bent section, one end of the bent conductive wire is a straight line section, the other end of the bent conductive wire has two U-shaped corners, and both ends of the bent conductive wire 4 are connected to the exposed contact pieces 8. Furthermore, the bending type wire 4 is wrapped by a single copper wire through insulating plastics, and two ends of the copper wire are connected with the exposed connecting sheet 8. In this example, the diameter of the copper wire is 0.15 mm.
The exposed contact piece 8 of the bent type wire 4 connecting straight line section extends out of the end part of the sealing tube 3, and the straight line section is clamped in the groove of the sealing tube 3. The bent type lead 4 and the sealing tube 3 are convenient to disassemble, and the sealing tube 3 with different lengths can be replaced at any time according to field conditions to meet the requirements of different field scales.
The bending section of the bending type lead 4 is clamped in the groove 5, the end part of the bending section bypasses the electrode fixing device 2, the other exposed contact piece 8 is inserted into the non-through hole 6 of the dentate electrode 1, and the non-through hole 6 prevents the electrode from being damaged by the well wall in the process of placing the electrode into a hole and drilling the electrode while ensuring the sufficient connection between the electrode and the lead.
The manufacturing method of the electrode device comprises the following steps:
step 1: and manufacturing each part of the electrode device, and manufacturing the sealing tubes 3 and the bent conducting wires 4 with different lengths and numbers according to the pole pitch and the detection range required by actual detection.
Step 2: the dentate electrode 1 is rotationally fixed on the electrode fixing device 2 with threads (before fixation, the electrode fixing device 2 is sleeved with waterproof adhesive tape), the front end (with one end with a U-shaped corner) of the bent wire 4 is clamped in the groove 5 in the electrode fixing device 2, the sealing tube 3 is inserted into the electrode fixing device 2, and the tail end of the bent wire 4 extends out of the sealing tube 3 and is embedded in the groove in the sealing tube 3 to form an electrode unit.
The electrode device of the embodiment adopts a combined structure, optimizes and improves the electrode structure, is convenient to carry, increases the flexibility of electrode combination, can freely increase or reduce the number of electrode units, and ensures the stability of the structure; the cross-hole CT test device is not easy to deform due to water pressure in the using process, the contact surface area of the electrode is increased, the injection of current is facilitated, the signal quality is improved, and the efficiency and the accuracy of the cross-hole CT test are greatly improved.
Example two:
as shown in fig. 8, this embodiment provides a system for cross-hole CT test, which includes a plurality of electrode devices (electrode units 10) according to the first embodiment, and according to the pre-calculated number of electrodes, the bolts 7 at the tail of the sealed tube 3 are rotated to connect the bent wires 4 in the electrode units with the adjacent bent wires 12 and penetrate out of the sealed tube 3, and the electrode units are connected together, and the plurality of bent wires 4 form an equal-differential-distance wire structure.
The tail part of the first electrode unit 10 (the electrode unit farthest from the ground 13) is sleeved with a sealing sleeve 11, the electrode unit 10 at the tail end is connected with an ultrahigh-density electrical method instrument through a bent lead 4, and the abnormal body 9 is detected through the ultrahigh-density electrical method instrument.
The electrode unit 10 is detachable and the electrode unit 10 may be added or subtracted as needed in the field.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. An electrode device for cross-hole CT tests is characterized by comprising a toothed electrode and a bent lead, wherein the toothed electrode is arranged on the outer side of an electrode fixing device, and a sealing tube is inserted into the inner side of the electrode fixing device; the bending type lead is a lead with a bending section, one end of the bending type lead is a straight line section, and the other end of the bending type lead is provided with two U-shaped corners;
the two ends of the bending type conducting wire are respectively provided with exposed contact pieces, the exposed contact pieces of the connecting straight line section of the bending type conducting wire extend out of the end part of the sealing tube, the straight line section is clamped in the groove of the sealing tube, the bending section of the bending type conducting wire is clamped in the groove of the electrode fixing device, and the bending type conducting wire bypasses the electrode fixing device to enable the other end of the bending type conducting wire to be connected with the toothed electrode through the exposed contact pieces.
2. The electrode device for cross-hole CT test as claimed in claim 1, wherein the cross section of the toothed electrode is a circular ring and the outer side of the circular ring has a toothed structure.
3. The electrode assembly of claim 1, wherein the toothed electrode has a non-through hole along an axis for engaging a bare tab.
4. The electrode device for the cross-hole CT test according to claim 1, wherein grooves for fixing the bent wires are formed on the inner sides of the electrode fixing device and the sealing tube respectively.
5. The electrode assembly for cross-hole CT test of claim 1, wherein the sealing tube has bolt holes inside for installing bolts to connect the bent wires with adjacent wires.
6. The electrode assembly of claim 1, wherein the sealing tube is inserted into the electrode holder to a set depth.
7. A system for cross-hole CT testing, comprising a plurality of electrode assemblies according to any of claims 1-6, adjacent electrode assemblies being connected by bent wires; the tail part of the electrode device positioned at the head end is sleeved with a sealing sleeve, and the electrode device positioned at the tail end is connected with the ultrahigh-density electrical method instrument through a bent wire.
8. The system for cross-hole CT test according to claim 7, wherein adjacent bent wires are connected inside the sealed tube by bolts.
9. The method for manufacturing an electrode device for cross-hole CT test according to any one of claims 1-6, comprising the steps of:
manufacturing sealing tubes and bent wires with different lengths and numbers;
fixing the toothed electrode outside the electrode fixing device, clamping the front end of the bent lead in a groove of the electrode fixing device, and inserting the sealing tube into the electrode fixing device;
the tail end of the bent lead extends out of the sealing pipe and is embedded in the groove in the sealing pipe to form an electrode unit.
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| CN201911293265.4A CN110989003B (en) | 2019-12-16 | 2019-12-16 | Electrode device, system and method for cross-hole CT test |
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| CN201911293265.4A CN110989003B (en) | 2019-12-16 | 2019-12-16 | Electrode device, system and method for cross-hole CT test |
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| CN110989003B true CN110989003B (en) | 2021-10-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111650649A (en) * | 2020-07-10 | 2020-09-11 | 中国海洋大学 | Cable integrated electric field sensor electrode array and preparation method thereof |
| CN112987109B (en) * | 2021-02-24 | 2022-05-17 | 山东大学 | Multifunctional portable cross-hole resistivity CT signal acquisition device, system and method |
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