Magnetic type non-polarized electrode device

Abstract

The invention discloses a magnetic type non-polarized electrode device, which belongs to the technical field of geophysical exploration, and comprises a non-polarized electrode, a magnetic head A, a wire and a plugging clamp, the non-polarized electrode comprises an electrode body and a magnetic suction head B; the electrode core of the electrode body extends out of the top end of the electrode body; the magnetic suction head B is sleeved outside the electrode core and is fixedly connected to the top end of the electrode body; the magnetic suction head A comprises a conductive column; the conductive column is of a telescopic structure; the magnetic suction head A and the magnetic suction head B are in magnetic suction fit, and a conductive column of the magnetic suction head A abuts against the end of the electrode core. And the plugging clamp is electrically connected with the conductive column of the magnetic suction head A through a wire. Accurate connection between the non-polarized electrode and the connecting line is achieved through the magnetic suction head, and a stable signal transmission channel can be formed between the multi-channel cable and the ground.

Description

Technical Field

[0001] The invention belongs to the technical field of geophysical exploration, and in particular relates to a magnetically attracted non-polarizable electrode device. Background Art

[0002] Geophysical electromagnetic observation methods for both artificial and natural sources include: magnetotelluric method, natural field audio magnetotelluric method, controlled source audio magnetotelluric method and induced polarization method. The electrodes used in this type of observation method are non-polarized electrodes (see Figure 2). Figure 1 ); the electrodes used in the conventional resistivity method (i.e., resistivity profile method or resistivity depth method) and the high-density resistivity method are polarized electrodes (such as copper-nickel alloy electrodes, see Figure 2). Figure 2 ).

[0003] The observation system based on the above observation method usually includes: an instrument host, a power supply, a multi-channel cable and an electrode, wherein the multi-channel cable is connected to the instrument host. When performing observation, the electrode needs to be connected to the multi-channel cable of the observation instrument or the terminal of the observation instrument through a connecting wire so that the earth electrical signal can be transmitted to the instrument host. The connecting wire usually includes: a plug-in clip, a wire and a plug (or connector). For non-polarized electrodes, the connection method between the connecting wire and the electrode depends on the style of the plug or connector.

[0004] At present, there are two main ways to connect the connecting wire to the non-polarized electrode, such as Figure 3 As shown in the figure, the connection methods from top to bottom are: banana plug type, fork type and bare copper wire type. The above three connection methods have the following problems:

[0005] (1) Banana plug type: The connection is achieved by directly inserting the banana plug into the wiring hole at the top of the non-polarized electrode. As time goes by or after repeated plugging and unplugging, the elasticity of the banana plug will weaken, which will reduce the contact area and contact strength between the banana plug and the wiring hole. In addition, the banana plug is easily corroded due to long-term exposure, and the jack is easily mixed with mud and sand, causing poor connection and increased resistance, which in turn affects signal conduction.

[0006] (2) Fork type: conduction is achieved by fitting a fork-shaped connector onto the electrode core at the top of the polarized electrode and then tightening the lead cap. Since the lead cap needs to be tightened to fix the fork-shaped connector, it is easy to slip and come off after long-term use, resulting in the inability to tighten the fork-shaped plug. At the same time, since the fork-shaped installation requires tightening the lead cap, the construction efficiency will be reduced.

[0007] Therefore, there is a need for a non-polarizable electrode device for geophysical electromagnetic observations, which can ensure a stable, reliable and convenient connection between the non-polarizable electrode and the connecting wire. Summary of the invention

[0008] In view of this, the present invention provides a magnetic non-polarized electrode device, which realizes accurate connection between the non-polarized electrode and the connecting wire through a magnetic suction head, and can form a stable signal transmission channel between the multi-channel cable and the ground.

[0009] The present invention is achieved through the following technical solutions:

[0010] A non-polarizable electrode device, comprising: a non-polarizable electrode, a magnetic suction head A, a wire and a plug-in clip;

[0011] The non-polarizable electrode comprises: an electrode body and a magnetic suction head B; the electrode core of the electrode body extends out of the top of the electrode body;

[0012] The magnetic head B is sleeved outside the electrode core and fixedly connected to the top of the electrode body;

[0013] The magnetic suction head A comprises: a conductive column; the conductive column is a retractable structure;

[0014] The magnetic suction head A and the magnetic suction head B are magnetically matched;

[0015] When the magnetic head A is connected to the magnetic head B, the conductive column of the magnetic head A abuts against the end of the electrode core;

[0016] The plug-in clip and the conductive column of the magnetic suction head A are electrically connected through a wire.

[0017] Furthermore, the magnetic suction head A also includes: a shell A and a magnet ring A;

[0018] The housing A is a columnar structure with a central hole; a magnet ring A is coaxially arranged in the housing A;

[0019] The conductive column of the magnetic suction head A is coaxially sleeved in the central hole of the shell A.

[0020] Furthermore, the conductive column of the magnetic suction head A is a spring pin;

[0021] The needle tube of the spring needle is fixedly connected to the central hole of the housing A; the needle head of the spring needle is installed in the needle tube through a spring; and the needle head of the spring needle abuts against the end of the electrode core.

[0022] Furthermore, the magnetic suction head B comprises: a shell B and a magnet ring B;

[0023] The shell B is a columnar structure with a central hole, coaxially sleeved outside the electrode core. The shell B is fixedly connected to the top end surface of the electrode body;

[0024] A magnet ring B is coaxially arranged in the shell B; the magnet ring B and the magnet ring A are magnetically engaged with each other.

[0025] Furthermore, a ring-shaped limiting boss B extends from the center of the top end surface of the housing B along the periphery of the center hole thereof;

[0026] An annular limiting boss A extends along the outer circumference of the bottom end surface of the shell A; the diameter of the central hole of the shell A is larger than the outer diameter of the limiting boss B, and the inner diameter of the limiting boss A is larger than the outer diameter of the shell B;

[0027] The center hole of the shell A forms a radial limit for the limiting boss B, and the limiting boss A forms a radial limit for the shell B.

[0028] Furthermore, both the shell B and the shell A are made of non-conductive materials.

[0029] Furthermore, the top end surface of the housing A is processed with a truncated cone-shaped transition structure, and the transition structure forms a gradually tapering structure at the top of the housing A;

[0030] The wire passes through the truncated cone structure and is electrically connected to the needle tube of the spring needle.

[0031] Beneficial effects:

[0032] (1) In the present invention, a magnetic non-polarizable electrode device is provided, wherein a magnetic head B is mounted outside the electrode core of an electrode body, so that the non-polarizable electrode and the connecting wire can be connected by means of the magnetic coupling between the magnetic head B and the magnetic head A. The magnetic coupling method can solve the problem of a loose connection between the connecting wire and the non-polarizable electrode, thereby ensuring a stable connection between the conductive column of the magnetic head A and the electrode core of the electrode body. At the same time, the magnetic coupling method makes the connection between the non-polarizable electrode and the connecting wire convenient and quick, and the operator can achieve the connection with one hand, which can greatly improve the deployment efficiency of the non-polarizable electrode device at the observation site. At the same time, since the non-polarizable electrode structure does not need to be twisted, the service life of the electrode, especially the magnetic head B and the magnetic head A, can be increased.

[0033] (2) A magnetically attracted non-polarized electrode device of the present invention has a magnet ring A inside a shell A, which can isolate the magnet ring A from the external environment and protect the magnet ring A from being affected by the external environment; the magnet ring A is coaxial with the shell A, and the conductive column is coaxially inserted into the inner hole of the shell A, so that the conductive column and the electrode core can be accurately connected.

[0034] (3) In a magnetic non-polarized electrode device of the present invention, the conductive column of the magnetic head A is a spring needle, and the needle of the spring needle is installed in the needle tube through a spring. The needle can accurately contact the end of the electrode core through the elasticity of the spring, thereby providing a more firm and stable connection, thereby ensuring the stability of signal transmission.

[0035] (4) In a magnetic non-polarizable electrode device of the present invention, the center hole of the shell A forms a radial limit for the limiting boss B, and the limiting boss A forms a radial limit for the shell B, which can prevent the magnetic head B and the magnetic head A from sliding during use of the non-polarizable electrode device, and can provide a more firm and stable connection, and can reduce signal interruption caused by loose wires, thereby ensuring the stability of the connection; since the non-polarizable electrode device has no jack and the exposed area of ​​the conductive column of the magnetic head A and the electrode core of the magnetic head B is small, dust, mud, etc. are not easy to enter the interior of the device (i.e., between the magnetic connector A and the magnetic connector B), which can prevent the external environment from corroding the spring needle or the electrode core, thereby extending the service life of the non-polarizable electrode device; at the same time, the structure of the magnetic head A and the magnetic head B of the non-polarizable electrode device is easy to wipe, which is conducive to storage.

[0036] (5) In the magnetic non-polarized electrode device of the present invention, both the outer shell A and the outer shell B are made of non-conductive materials, which can protect the conductive column (i.e., spring pin) of the magnetic head A and the electrode core of the magnetic head B from being affected by the external environment, and can also reduce the mixing of external current, thereby ensuring the stability of the electrical signal; since the magnet ring A is arranged inside the non-conductive outer shell A and is wrapped by the outer shell A, and the magnet ring B is arranged inside the non-conductive outer shell B and is wrapped by the outer shell B, the integrity of the magnet can be protected, and the gap between the magnet and the outer shell is avoided from being exposed, thereby preventing dust from entering.

[0037] (6) In a magnetic non-polarizable electrode device of the present invention, the top end surface of the housing A is processed with a truncated cone-shaped transition structure, and the transition structure can protect the wire from being broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of an existing non-polarizable electrode;

[0039] Figure 2 is a schematic diagram of the structure of the polarized electrode;

[0040] Figure 3 These are two common connection cables used to connect non-polarizable electrodes to multi-channel cables;

[0041] Figure 4 It is a schematic structural diagram of the non-polarizable electrode of the present invention;

[0042] Figure 5 It is a structural schematic diagram of the connecting line of the present invention;

[0043] Figure 6 It is a structural schematic diagram of the magnetic suction head A of the present invention;

[0044] Among them, 1-electrode body, 101-electrode core, 2-magnetic head B, 201-housing B, 202-magnet ring B, 3-magnetic head A, 301-housing A, 302-spring needle, 303-magnet ring A, 4-wire, 5-plug-in clip. DETAILED DESCRIPTION

[0045] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0046] Embodiment 1:

[0047] This embodiment provides a magnetic non-polarized electrode device for transmitting signals between the earth's magnetic field and an observation system.

[0048] The non-polarizable electrode device comprises: a non-polarizable electrode and a connecting wire.

[0049] like Figure 4 As shown, the non-polarizable electrode includes: an electrode body 1 and a magnetic suction head B2.

[0050] The electrode core 101 in the electrode body 1 extends out from the top of the electrode body 1 .

[0051] The magnetic suction head B2 includes: a shell B201 and a magnet ring B202. The shell B201 is a columnar structure with a center hole, which is coaxially mounted outside the electrode core 101. A ring-shaped limiting boss B extends along the outer periphery of the center hole at the center of the top end face of the shell B201. The shell B201 is fixedly connected to the top of the electrode body 1. The thickness of the shell B201 (including the height of the limiting boss B) is less than or equal to the length of the electrode core 101 extending from the top of the electrode body 1. A magnet ring B202 is coaxially arranged inside the shell B201. The shell B201 is made of non-conductive material to reduce the entry of external interference current. In this embodiment, the material of the shell B201 is preferably TPU (thermoplastic polyurethane elastomer) material, and the shell B201 can be wrapped around the magnet ring B202 by injection molding. The TPU material can improve the wear resistance and corrosion resistance of the magnetic suction head B2, and can also prevent the electrode core 101 from being affected by the external environment (such as rust, etc.), and reduce the mixing of external interference current. In this embodiment, the material of the magnet ring B202 is preferably neodymium iron boron strong magnetic material.

[0052] like Figure 5 As shown, the connecting line includes: a magnetic head A3, a conductor 4 and a plug-in clip 5 (adopting a plug-in clip in the prior art).

[0053] like Figure 6 As shown, the magnetic head A3 includes: a housing A301, a spring pin 302 (i.e., a pogo pin) and a magnet ring A303;

[0054] The shell A301 is a columnar structure with a center hole. A ring-shaped limiting boss A extends along the outer circumference of the bottom end surface of the shell A301. The diameter of the center hole of the shell A301 is larger than the outer diameter of the limiting boss B, and the inner diameter of the limiting boss A is larger than the outer diameter of the shell B201. A magnet ring A303 is coaxially arranged inside the shell A301, and the magnet ring A303 is magnetically matched with the magnet ring B202. The shell A301 is made of non-conductive material to reduce the entry of external interference current.

[0055] The spring needle 302 is coaxially sleeved in the center hole of the housing A301. The spring needle 302 serves as a conductive column of the magnetic head A3. The spring needle 302 comprises: a needle tube, a spring and a needle head. The needle tube of the spring needle 302 is fixedly connected to the center hole of the housing A301. The needle head of the spring needle 302 is installed in the needle tube through a spring, and the needle head reciprocates along the axial direction of the needle tube as the spring expands and contracts. The needle head of the spring needle 302 faces the bottom end face of the housing A301.

[0056] The magnetic head A3 is adsorbed on the magnetic head B2 through the magnetic attraction between the magnet ring A303 and the magnet ring B202. During adsorption, the limiting boss B extends into the center hole of the shell A301. The spring needle 302 is pressed against the end of the electrode core 101 by the elastic force of the spring. After adsorption, the upper end surface of the shell B201 fits with the lower end surface of the shell A301, and the spring needle 302 maintains connection with the electrode core 101. The inner hole of the shell A301 forms a radial limit on the limiting boss B, and the limiting boss A forms a radial limit on the shell B201, which can prevent the magnetic head B2 and the magnetic head A3 from sliding during the use of the device, thereby affecting the stability of the connection.

[0057] In this embodiment, the material of the shell A301 is preferably TPU (thermoplastic polyurethane elastomer) material, and the shell A301 can be wrapped around the magnet ring A303 by injection molding. TPU material can improve the wear resistance and corrosion resistance of the magnetic suction head A3, and can also prevent the spring pin 302 from being affected by the external environment (such as rust due to water, etc.), and reduce the mixing of external interference current. In this embodiment, the material of the magnet ring A303 is preferably neodymium iron boron strong magnetic material. The end face size of the magnet ring A303 in this embodiment is consistent with the end face size of the magnet ring B202.

[0058] The head of the plug-in clip 5 is electrically connected to the multi-channel cable of the instrument host, and the tail of the plug-in clip 5 is electrically connected to the needle tube of the spring needle 302 through the wire 4. In this embodiment, the wire 4 is a single-core multi-strand soft copper wire. The wire 4 is connected to the spring needle 302 by soldering.

[0059] After installation, the earth electrical signals collected by the non-polarized electrodes are transmitted to the instrument host through the spring needle 302, the wire 4, the plug-in clip 5 and the multi-channel cable in sequence, so as to perform geophysical electromagnetic observations.

[0060] Embodiment 2:

[0061] This embodiment provides a magnetic non-polarizable electrode device, based on the non-polarizable electrode device in Embodiment 1. The top end surface of the housing A301 is processed with a truncated cone-shaped transition structure, and the truncated cone-shaped transition structure forms a gradually tapering structure at the top of the housing A301. One end of the wire 4 passes through the truncated cone-shaped structure and is electrically connected to the needle tube of the spring needle 302. The truncated cone-shaped structure is used to protect the wire 4 and prevent the wire 4 from breaking during use.

[0062] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic non-polarizable electrode device, characterized in that: include: Non-polarizable electrode, magnetic suction head A (3), wire (4) and plug-in clip (5); The non-polarizable electrode comprises: an electrode body (1) and a magnetic suction head B (2); an electrode core (101) of the electrode body (1) extends out from the top of the electrode body (1); The magnetic suction head B (2) is sleeved outside the electrode core (101) and is fixedly connected to the top end of the electrode body (1); The magnetic suction head A (3) comprises: a conductive column; the conductive column is a retractable structure; The magnetic suction head A (3) and the magnetic suction head B (2) are magnetically matched; When the magnetic suction head A (3) is connected to the magnetic suction head B (2), the conductive column of the magnetic suction head A (3) abuts against the end of the electrode core (101); The plug-in clip (5) and the conductive column of the magnetic suction head A (1) are electrically connected via a wire (4).

2. A magnetic non-polarizable electrode device as claimed in claim 1, characterized in that: The magnetic suction head A (3) further comprises: a housing A (301) and a magnet ring A (303); The housing A (301) is a columnar structure with a central hole; a magnet ring A (303) is coaxially arranged inside the housing A (301); The conductive column of the magnetic head A (3) is coaxially inserted into the central hole of the housing A (301).

3. A magnetic non-polarizable electrode device as claimed in claim 2, characterized in that: The conductive column of the magnetic suction head A (3) is a spring pin (302); The needle tube of the spring needle (302) is fixedly connected to the central hole of the housing A (301); the needle head of the spring needle (302) is installed in the needle tube through a spring; and the needle head of the spring needle (302) abuts against the end of the electrode core (101).

4. A magnetic non-polarizable electrode device as claimed in claim 2, characterized in that: The magnetic suction head B (2) comprises: a housing B (201) and a magnet ring B (202); The shell B (201) is a columnar structure with a central hole, and is coaxially sleeved outside the electrode core (101). The shell B (201) is fixedly connected to the top end surface of the electrode body (1); A magnet ring B (202) is coaxially disposed inside the housing B (201); the magnet ring B (202) and the magnet ring A (302) are magnetically engaged with each other.

5. A magnetic non-polarizable electrode device as claimed in claim 4, characterized in that: An annular limiting boss B extends from the center of the top end surface of the housing B (201) along the periphery of the center hole thereof; A ring-shaped limiting boss A extends along the outer circumference of the bottom end surface of the shell A (301); the diameter of the central hole of the shell A (301) is larger than the outer diameter of the limiting boss B, and the inner diameter of the limiting boss A is larger than the outer diameter of the shell B (201); The central hole of the housing A (301) forms a radial limit for the limit boss B, and the limit boss A forms a radial limit for the housing B (201).

6. A magnetic non-polarizable electrode device as claimed in claim 4 or 5, characterized in that: The shell B (201) and the shell A (301) are both made of non-conductive materials.

7. A magnetic non-polarizable electrode device according to any one of claims 2 to 5, characterized in that: The top end surface of the housing A (301) is processed with a truncated cone-shaped transition structure, and the transition structure forms a gradually tapering structure at the top of the housing A (301); The wire (4) passes through the truncated cone-shaped structure and is electrically connected to the needle tube of the spring needle (302).

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