CN218601490U - Non-polarized electrode for electromagnetic detection of urban underground space - Google Patents
Non-polarized electrode for electromagnetic detection of urban underground space Download PDFInfo
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- CN218601490U CN218601490U CN202223372972.2U CN202223372972U CN218601490U CN 218601490 U CN218601490 U CN 218601490U CN 202223372972 U CN202223372972 U CN 202223372972U CN 218601490 U CN218601490 U CN 218601490U
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Abstract
The utility model discloses a non-polarized electrode is surveyed to city underground space electromagnetism, include: the electrode comprises an electrode shell, a circular bottom cover assembly, an electrode lead and a protective sleeve; the round bottom cover assembly is arranged at the bottom of the electrode shell and is in contact with electrolyte filled in the electrode shell, one end of the electrode lead is embedded into the electrolyte, and the other end of the electrode lead is led out from the top of the electrode shell. During the use, upwards stimulate the protection sleeve, expose circular bottom cap subassembly and with soil contact, bury in the soil, carry out the potentiometric measurement, after measuring the completion, pull down the protection sleeve and make its circular bottom cap subassembly of cladding, maintain the nonpolarized electrode for the maintenance part of nonpolarized electrode becomes a body structure with nonpolarized electrode main part, and not only operation mode is simple, promotes maintenance efficiency, can avoid the maintenance liquid excessive moreover to spill over, guarantees the maintenance effect.
Description
Technical Field
The utility model relates to an electrical prospecting equipment technical field especially relates to a nonpolarized electrode of city underground space electromagnetic surveying.
Background
In order to eliminate the pole difference interference between the electrodes and obtain a stable and reliable electric field signal, the magnetotelluric apparatus usually uses non-polarized electrodes as the acquisition device of the electric field signal.
The non-polarising electrode is generally cylindrical in shape, with the upper end of the cylinder provided with a cable for connection to an instrument, and the lower end of the cylinder being embedded in the earth in use for receiving electrical signals. Since the non-polarized electrode is a consumable material, it needs to be periodically maintained when it is left idle for a long time. The current commonly used maintenance mode is to soak the lower end of the non-polarized electrode in saturated saline, take out the non-polarized electrode after 0.5h, and put the non-polarized electrode into a plastic envelope, wherein the operation is performed for 1 time every 30d or so, and the mode needs to be separately provided with maintenance space and maintenance equipment, and has complex operation and low efficiency.
In order to solve the above technical problems, those skilled in the art propose that a sheet-like sponge is fully absorbed with saturated saline water, so that the sponge is tightly attached to the lower end of the non-polarized electrode, and then the sponge is integrally installed in a plastic envelope, thereby reducing the operation difficulty and improving the maintenance efficiency. However, in the process of sleeving the plastic envelopes, the sponge full of saturated saline water is very easily extruded, so that the liquid absorbed in the sponge is pressed to overflow, the saline attached to the surface of the electrode is difficult to clean, and even enters the electrode through the seepage holes in a reverse direction, the accuracy of measurement is influenced, and the plastic envelopes taken down in the measurement process are randomly placed and are very easily lost, so that pollution is caused.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a non-polarized electrode is surveyed to city underground space electromagnetism. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The utility model adopts the following technical scheme:
in some alternative embodiments, there is provided an urban underground space electromagnetic detection non-polarized electrode comprising: the electrode comprises an electrode shell, a circular bottom cover assembly, an electrode lead and a protective sleeve; the circular bottom cover assembly is arranged at the bottom of the electrode shell and is in contact with electrolyte filled in the electrode shell, one end of the electrode lead is embedded in the electrolyte, and the other end of the electrode lead is led out from the top of the electrode shell; the cladding of protection cover spare is in the outside of circular bottom subassembly is just installed on the electrode shell, protection cover spare includes: the electrode comprises a column sleeve shell, a rubber sole and a sponge lamellar, wherein the column sleeve shell is sleeved on the electrode shell, the rubber sole is arranged at the end part of the column sleeve shell, a plurality of scattering-shaped splitting notches are formed in the rubber sole so that the rubber sole is split into a plurality of protective sheets, and the sponge lamellar is arranged on one side, facing the circular bottom cover assembly, of the protective sheets.
Further, the circular bottom cap assembly includes: a bottom cover plate and a partition plate; the bottom cover plate is arranged at the bottom end of the electrode shell and seals the bottom of the electrode shell, and seepage holes are formed in the bottom cover plate; the baffle sets up the inside of electrode shell just is located the top of bottom cover plate, set up the slow speed passageway on the baffle.
Further, the non-polarized electrode for electromagnetic detection of urban underground space further comprises: a circular top cover and a binding post; the round top cover is arranged at the top end of the electrode shell and seals the top of the electrode shell, the wiring terminal is arranged on the round top cover, and the electrode lead is connected with the wiring terminal.
Further, the non-polarized electrode for electromagnetic detection of urban underground space further comprises: an electrode lead cap; the wiring terminal is provided with a through hole, the electrode lead is led out to the outside of the electrode shell after passing through the through hole on the wiring terminal, and the electrode lead cap is sleeved on the part of the electrode lead led out from the top of the electrode shell.
Further, the non-polarized electrode for electromagnetic detection of urban underground space further comprises: the lifting rod and a rubber sleeve are sleeved outside the lifting rod; jacks are formed in two sides of the electrode shell, and two ends of the lifting rod are embedded into the jacks.
Furthermore, the electrode shell is of a hollow columnar structure, the height of the electrode shell is 9.5 cm, and the electrode shell is made of PVC.
Further, the diameter of the circular top cover is 4 centimeters, and the thickness of the circular top cover is 0.3 centimeter.
Furthermore, the diameter of the bottom cover plate is 4 centimeters, the thickness of the bottom cover plate is 0.3 centimeter, and the bottom cover plate is a wooden cover plate or a ceramic cover plate.
Further, the column jacket housing comprises: the electrode comprises a column sleeve main body, wherein an upper support ring and a lower support ring are arranged on the inner wall of the column sleeve main body, and the support rings are in contact with the outer wall of the electrode shell.
Furthermore, a tooth socket is formed in one side, contacting with the outer wall of the electrode shell, of the support ring.
The utility model discloses the beneficial effect who brings: during the use, upwards spur the protection sleeve, expose circular bottom cap subassembly and with soil contact, bury in the soil, carry out potentiometric measurement, after measuring the completion, pull down the protection sleeve and make its circular bottom cap subassembly of cladding, maintain the nonpolarized electrode for the maintenance part of nonpolarized electrode becomes a body structure with nonpolarized electrode main part, and not only operation mode is simple, promotes maintenance efficiency, can avoid moreover that maintenance liquid is excessive to spill over, guarantees the maintenance effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the external structure of the non-polarized electrode of the present invention;
FIG. 2 is a schematic diagram of the external structure of the non-polarized electrode of the present invention during measurement;
FIG. 3 is a schematic diagram of the internal structure of the non-polarized electrode of the present invention;
fig. 4 is a schematic structural view of the protective sleeve of the present invention;
FIG. 5 is a schematic structural view of the support ring of the present invention;
fig. 6 is a resistivity-depth profile calculated using the non-polarized electrode observation of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-5, in some illustrative embodiments, the present invention provides an urban underground space electromagnetic survey non-polarized electrode, comprising: the electrode comprises an electrode shell 1, a circular bottom cover assembly, an electrode lead 3, a protective sleeve, a circular top cover 5, a binding post 6, an electrode lead cap 7, a lifting rod 8 and a rubber sleeve 9.
The electrode shell 1 is a white hollow columnar structure, the height of the electrode shell is 9.5 cm, the electrode shell is made of PVC, and electrolyte is filled in the electrode shell. The electrolyte is a compound which is dissolved in an aqueous solution or can conduct electricity by itself in a molten state, and lead chloride powder is selected as the electrolyte in this embodiment.
The circular bottom cap assembly includes: a bottom cover plate 201 and a partition plate 202.
The diameter of the bottom cover plate 201 is 4 cm, the thickness is 0.3 cm, and the bottom cover plate 201 is a wooden cover plate or a ceramic cover plate. The bottom cover plate 201 is arranged at the bottom end of the electrode shell 1, the bottom of the electrode shell 1 is sealed, and meanwhile, the seepage holes 203 are formed in the bottom cover plate 201, so that seepage can be facilitated.
The separator 202 is arranged inside the electrode shell 1 and above the bottom cover plate 201, the distance between the separator 202 and the bottom cover plate 201 is 0.5cm-3cm, the separator 202 is provided with a retarding channel 204, and the separator 202 divides the electrolyte into two parts, so that the ion exchange speed is retarded, and the electrode range is more stable. Preferably, the inner wall of the retarding channel 204 is inclined, so that the retarding channel 204 is gradually tightened from top to bottom, a good diffusion retarding effect can be achieved, the service life is prolonged, and meanwhile, the normal measurement of the potential is not influenced.
One end of the electrode lead 3 is embedded in the electrolyte, the other end is led out from the top of the electrode shell 1, and the bottom cover plate 201 is in contact with the electrolyte filled in the electrode shell 1. When the electrode lead 3 made of metal is placed in electrolyte, ions on the surface of the electrode lead 3 migrate into soil, so that the concentration of the ions in the soil is increased, and free electrons are generated on the electrode lead 3; at the same time, due to the action of the movement of the substance, the ions settle into the surface of the electrode lead 3 and the free electrons thereon. When the settling and migration velocities of the ions reach a dynamic equilibrium, the polarization potential thus generated will be maintained.
The circular cap 5 has a diameter of 4 cm and a thickness of 0.3 cm. Circular top cap 5 sets up on the top of electrode shell 1 and seals the top of electrode shell 1, and terminal 6 sets up on circular top cap 5, and electrode lead 3 is connected with terminal 6, and terminal 6 is used for being connected with the electromagnetism observation instrument for the observation instrument can detect electric potential data.
The wiring terminal 6 is provided with a through hole, the electrode lead 3 is led out to the outside of the electrode shell 1 after passing through the through hole on the wiring terminal 6, and the electrode lead cap 7 is sleeved on the part of the electrode lead 3 led out from the top of the electrode shell 1, so that the protection effect is achieved. The electrode lead cap 7 is made of plastic and plays an insulating role.
Jacks are formed in two sides of the electrode shell 1, two ends of the lifting rod 8 are embedded into the jacks, the lifting rod 8 can be used for lifting the non-polarized electrode as a handle, and the electrode shell is convenient to carry in the observation process. The rubber sleeve 9 is sleeved outside the lifting rod 8, plays a role in increasing friction force, is convenient to lift, and can also play a certain protection role on the lifting rod 8, so that the conditions of corrosion and the like are avoided.
The cladding of protection sleeve spare is in the outside of circular bottom subassembly and install on electrode housing 1, and is specific, and protection sleeve spare includes: a jacket shell 401, a rubber sole 402 and a sponge layer 403.
The column sleeve shell 401 is sleeved on the electrode shell 1 and can move up and down along the electrode shell 1. A rubber sole 402 is provided at the end of the jacket housing 401, and when no measurement is to be taken, the rubber sole 402 closes the bottom of the jacket housing 401, i.e. the rubber sole 402 covers the bottom cover plate 201. A plurality of scattered splitting notches 404 are formed in the rubber sole 402, the rubber sole 402 is split into a plurality of protective sheets 405 due to the design of the splitting notches 404, and the sponge layer pieces 403 are arranged on one side, facing the round bottom cover assembly, of the protective sheets 405.
When the non-polarized electrode is not used for measurement, the protective sleeve is at the lowest position, the protective sheets 405 are spliced into the sheet rubber sole 402 to seal the bottom of the column sleeve shell 401, the rubber sole 402 covers the bottom cover plate 201, the sponge layer piece 403 is in contact with the bottom cover plate 201 to keep the bottom cover plate 201 wet, and a maintenance effect is achieved. When the measurement is needed, the column jacket shell 401 is pulled upwards, the bottom cover plate 201 applies a pushing force to the rubber sole 402 at the moment until all the protection sheets 405 are separated, if the column jacket shell 401 continues to move, the protection sheets 405 can be attached to the electrode shell 1 from a horizontal state, and at the moment, the bottom cover plate 201 is completely exposed and can be buried underground to be in contact with soil for measurement.
Above-mentioned structural design makes the main part structure as an organic whole of the maintenance part of non-polarized electrode and non-polarized electrode, and not only operation mode is simple, only need during specific use reciprocate column jacket shell 401 can, promote maintenance efficiency moreover, need not additionally to be equipped with maintenance equipment. Meanwhile, when the sponge layer piece 403 needs to be supplemented with saturated saline, the bottom end of the non-polarized electrode only needs to be lightly contacted with the saline, so that excessive suction is avoided. And the maintenance part of the non-polarized electrode is always positioned on the main body part of the non-polarized electrode, so that the phenomenon of pollution caused by random placement and replacement can be avoided, and the risk of loss is avoided. In addition, the structural design of the protective sleeve can avoid excessive extrusion of the sponge sheet 403 during each sheathing, thereby avoiding excessive overflow or backflow of the maintenance liquid into the electrode.
The column jacket housing 401 includes: the column sleeve main body, the inner wall of the column sleeve main body is provided with an upper supporting ring 406 and a lower supporting ring 406, and the supporting rings 406 are contacted with the outer wall of the electrode shell 1. The design of the support ring 406 can facilitate pulling the jacket shell 401 up and down, and can also prevent impurities from entering the gap and affecting the movement. Preferably, the supporting ring 406 is provided with a tooth slot 407 on the side contacting with the outer wall of the electrode housing 1, and the tooth slot 407 can further reduce the contact area between the supporting ring 406 and the electrode housing 1, thereby reducing the friction force on the premise of ensuring the sealing property.
Utilize the utility model discloses a deep fracture detection application test has been carried out to nonpolarizing electrode in Beijing cisoid area, and experimental survey line length is 2.6km, and measuring point is apart from 50m, and the emission source is long 2.4m. The working parameters are as follows: emitting fundamental frequency of 1Hz, emitting current of 24A, observing vertical induced electromotive force dBz/dt component, and measuring time for 2 minutes at a single point.
As shown in fig. 6, the main strata are the fourth and dwarfism J according to the known geological and borehole data in the area. Wherein the fourth series of strata can be divided into an upper updating system Qp from shallow to deep 3 Update system Qp in China 2 And update the system Qp 1 . Lower update System Qp 1 Mainly is silt sediments alternated with river phases and lakes and marshes, and is reflected in low resistance; middle update system Qp 2 Mainly sand and gravel sediments of river facies or lake and marsh edge facies, and has relatively high resistance; update system Qp 3 The sediment is a sediment alternative between a river phase and a shallow lake and marsh, mainly comprises the river phase, mainly comprises sediments such as medium coarse sand, sand gravel and gravel, generally contains calcium nodules, and has relatively low resistance. The lithology of the Jurassic formation is mainly andesite, glutenite and sandstone, and shows high resistance.
FIG. 6 shows well the distribution of the shallow 3 quaternary stratums of the survey line, which is substantially consistent with the drilling results; it also reflects well for formation dislocation caused by a fair fracture and a low stopband for fracture.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An unpolarized electrode for electromagnetic surveying of urban underground spaces, comprising: the electrode comprises an electrode shell, a circular bottom cover assembly, an electrode lead and a protective sleeve; the circular bottom cover assembly is arranged at the bottom of the electrode shell and is in contact with electrolyte filled in the electrode shell, one end of the electrode lead is embedded in the electrolyte, and the other end of the electrode lead is led out from the top of the electrode shell; the cladding of protection cover spare is in the outside of circular bottom subassembly is just installed on the electrode housing, protection cover spare includes: the electrode comprises a column sleeve shell, a rubber leather bottom and a sponge lamina, wherein the column sleeve shell is sleeved on the electrode shell, the rubber leather bottom is arranged at the end part of the column sleeve shell, a plurality of scattering splitting notches are formed in the rubber leather bottom, so that the rubber leather bottom is split into a plurality of protective pieces, and the sponge lamina is arranged on one side, facing the circular bottom cover component, of each protective piece.
2. The non-polarized electrode for electromagnetic detection of urban underground spaces according to claim 1, wherein the circular bottom cover assembly comprises: a bottom cover plate and a partition plate; the bottom cover plate is arranged at the bottom end of the electrode shell and seals the bottom of the electrode shell, and seepage holes are formed in the bottom cover plate; the baffle is arranged in the electrode shell and above the bottom cover plate, and a retarding channel is formed in the baffle.
3. The non-polarized electrode for electromagnetic detection of urban underground space according to claim 2, further comprising: a circular top cover and a binding post; the circular top cover is arranged at the top end of the electrode shell and seals the top of the electrode shell, the wiring terminal is arranged on the circular top cover, and the electrode lead is connected with the wiring terminal.
4. The non-polarized electrode for electromagnetic detection of urban underground space according to claim 3, further comprising: an electrode lead cap; the wiring terminal is provided with a through hole, the electrode lead penetrates through the through hole on the wiring terminal and then is led out to the outside of the electrode shell, and the electrode lead cap is sleeved on the part of the electrode lead led out from the top of the electrode shell.
5. The non-polarized electrode for electromagnetic detection of urban underground space according to claim 4, further comprising: the lifting rod and a rubber sleeve are sleeved outside the lifting rod; jacks are formed in two sides of the electrode shell, and two ends of the lifting rod are embedded into the jacks.
6. The non-polarized electrode for electromagnetic detection of urban underground spaces according to claim 5, wherein the electrode shell is of a hollow columnar structure with a height of 9.5 cm and is made of PVC.
7. The non-polarized electrode for electromagnetic detection of urban underground spaces according to claim 6, wherein the diameter of the circular top cover is 4 cm and the thickness is 0.3 cm.
8. The non-polarized electrode for electromagnetic detection of urban underground space according to claim 7, wherein the bottom cover plate has a diameter of 4 cm and a thickness of 0.3 cm, and is a wooden cover plate or a ceramic cover plate.
9. The non-polarized electrode for electromagnetic detection of urban underground space according to claim 8, wherein the column jacket housing comprises: the electrode sleeve comprises a column sleeve main body, wherein an upper support ring and a lower support ring are arranged on the inner wall of the column sleeve main body, and the support rings are in contact with the outer wall of the electrode shell.
10. The non-polarized electrode for electromagnetic detection of urban underground spaces according to claim 9, wherein the support ring is splined on the side in contact with the outer wall of the electrode housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223372972.2U CN218601490U (en) | 2022-12-13 | 2022-12-13 | Non-polarized electrode for electromagnetic detection of urban underground space |
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| CN202223372972.2U CN218601490U (en) | 2022-12-13 | 2022-12-13 | Non-polarized electrode for electromagnetic detection of urban underground space |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224444A (en) * | 2023-05-05 | 2023-06-06 | 枣庄科云信息科技发展有限公司 | Hollow electromagnetic exploration electrode with seepage hole |
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- 2022-12-13 CN CN202223372972.2U patent/CN218601490U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224444A (en) * | 2023-05-05 | 2023-06-06 | 枣庄科云信息科技发展有限公司 | Hollow electromagnetic exploration electrode with seepage hole |
| CN116224444B (en) * | 2023-05-05 | 2023-11-03 | 枣庄科云信息科技发展有限公司 | Hollow electromagnetic exploration electrode with seepage hole |
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