CN214310580U - High-voltage-resistance electromagnetic sensor - Google Patents
High-voltage-resistance electromagnetic sensor Download PDFInfo
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- CN214310580U CN214310580U CN202120014187.6U CN202120014187U CN214310580U CN 214310580 U CN214310580 U CN 214310580U CN 202120014187 U CN202120014187 U CN 202120014187U CN 214310580 U CN214310580 U CN 214310580U
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Abstract
The utility model discloses a high withstand voltage electromagnetic sensor, include: the waterproof connector comprises a shell, a protective sleeve, a watertight connector, a coil assembly and an electrode plate assembly; the watertight connector is arranged at the connector connecting end of the shell; the protective sleeve is sleeved on the outer side of the watertight connector; the top of the electrode plate is arranged at the mounting end of the electrode plate component of the shell; the electrode is arranged on the end face of the outer side of the bottom of the electrode plate and is electrically connected with the watertight connector through the electrode lead I and the electrode lead II; the coil assembly is arranged on one side of the electrode plate assembly, which is positioned in the inner cavity of the shell and is electrically connected with the watertight connector; the magnetic field is generated by the coil assembly, the electrode is exposed in seawater, the seawater and the ship move relatively, the magnetic induction line is cut, and a signal proportional to the relative water flow speed is generated to realize the detection of the ship speed, and the electrode plate and the motor are sealed by a glass sintering sealing process; therefore, the electromagnetic sensor is ensured to have good sealing performance and insulating performance under a high-pressure-resistant environment and better seawater corrosion resistance.
Description
Technical Field
The utility model relates to a propagate speed sensor field, more specifically the utility model relates to a high withstand voltage electromagnetic sensor that says so.
Background
According to the Faraday's law of electromagnetic induction, an alternating magnetic field is established by the sensor, which is stationary relative to the vessel and resides in the sea. When the naval vessel moves, the seawater inevitably cuts the magnetic lines of the built magnetic field. As a continuous conductive medium, an induced potential will be generated in any closed loop of seawater, which is picked up by the electrodes of the sensor, with the expression:
e＝BVL
in the formula:
e-velocity potential;
b-magnetic field intensity;
v is the speed of the ship;
l-equivalent electrode spacing.
In the case where B and L are known constants, the speed potential is detected, and the speed of the ship can be obtained.
The traditional underwater electromagnetic sensor requires speed measurement under the condition of not damaging a ship flow field, so that a plane electromagnetic sensor is basically adopted and generally extends out of a ship bottom by 5-10 mm.
The traditional electromagnetic sensor generally adopts an aluminum bronze (QAL9-4) shell, an electrode plate installed on an electrode is generally made of an epoxy laminated glass cloth plate or other non-metallic materials, the metal shell, the non-metallic electrode plate and the metal electrode are bonded into a whole by epoxy resin, and due to the fact that the difference of thermal expansion coefficients of metal and non-metal or epoxy resin is large, the defects of cracking and the like are caused due to different shrinkage rates of different materials in long-term use, and insulation is reduced when seawater enters a coil part, so that speed measurement is influenced.
Therefore, how to provide an electromagnetic sensor with high speed measurement accuracy and high voltage resistance is a problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve one of the above-mentioned technical problem among the prior art to a certain extent at least.
In view of this, the present invention aims to provide a high voltage-resistant electromagnetic sensor, which adopts a glass sintering electrode sealing manner to ensure that the weak link has good sealing performance and is insulated from each other, thereby ensuring that the electromagnetic sensor has good sealing performance and insulation performance in a high voltage-resistant environment and is more resistant to seawater corrosion; the whole structure has higher strength and stronger compression resistance, ensures the measurement precision, prolongs the service life,
in order to achieve the above purpose, the utility model adopts the following technical scheme:
a high withstand voltage electromagnetic sensor comprising: the waterproof connector comprises a shell, a protective sleeve, a watertight connector, a coil assembly and an electrode plate assembly;
the two ends of the shell are provided with openings, and the two ends of the shell are respectively and correspondingly provided with a connector connecting end and an electrode plate component connecting end; the watertight connector is mounted at the connector connection end of the housing; the protective sleeve is sleeved on the outer side of the watertight connector, one end of the protective sleeve is connected to the outer wall of the shell, and the other end of the protective sleeve is a free end;
the electrode plate assembly comprises an electrode plate and an electrode; the top of the electrode plate is arranged at the mounting end of the electrode plate assembly of the shell; the electrodes are divided into a first electrode and a second electrode, the first electrode and the second electrode are both arranged on the end face of the outer side of the bottom of the electrode plate and are electrically connected with the watertight connector through a first electrode lead and a second electrode lead which correspond to the first electrode lead and the second electrode lead respectively;
the coil assembly is installed on one side of the electrode plate, corresponding to the inner cavity of the shell, and is electrically connected with the watertight connector.
According to the technical scheme, compare with prior art, the utility model discloses a high withstand voltage electromagnetic sensor produces magnetic field through coil pack, and electrode one and electrode two expose in the sea water, and boats and ships remove, and sea water and boats and ships relative motion cut the magnetic induction line, and when two electrodes picked up the sea water and cut the magnetic line of force, the relative velocity of water proportional signal of production realized the detection to boats and ships speed.
Preferably, in the above high withstand voltage electromagnetic sensor, an annular protrusion is provided on an inner end surface of the electrode plate, and the coil assembly is fixedly bonded to an inner side of the annular protrusion.
Preferably, in the above high withstand voltage electromagnetic sensor, the coil assembly includes a bobbin base, an outer bobbin, an inner bobbin, an outer coil, an inner coil, a one-way soldering lug, an inner shielding copper foil, and an insulating pad;
the framework seat is of a cylindrical structure with an opening at the bottom, two outer coil holes and two inner coil holes are formed in the top wall of the framework seat, a middle line pipe is arranged in the middle of the framework seat, and the middle line pipe penetrates through the top wall of the framework seat; the outer framework and the inner framework are both annular, and the side walls of the outer framework and the inner framework are respectively provided with an annular groove correspondingly; the outer framework is sleeved outside the framework seat; the inner framework is sleeved between the middle line pipe and the inner wall of the framework seat; the outer coil is wound in the annular groove of the outer framework, and an outer wire I and an outer wire II are led out; the inner coil is wound in the annular groove of the inner framework, and an inner wire lead I and an inner wire lead II are led out; the first inner wire lead is connected with the first outer wire lead, and the second outer wire lead is twisted with the first electrode lead and is electrically connected with the watertight connector; the internal wire two and the electrode wire two are electrically connected with the watertight connector after being twisted
The one-way soldering lug is fixed at the top of the framework seat; the inner shielding copper foil is bonded to the bottom surface of the inner framework; the insulating pad is bonded on the bottom surface of the inner shielding copper foil; the inner shielding copper foil is connected with the one-way soldering lug through a lead, and the one-way soldering lug is connected with the ground wire of the watertight connector through a lead; the scheme can release a stable magnetic field like seawater so as to detect the speed of the ship through the magnetic field.
Preferably, in the above-mentioned high withstand voltage electromagnetic sensor, further comprises a sealing member, the sealing member being mounted at a joint of the electrode plate and the case; this scheme can seal electrode plate and casing inside, prevents that the sea water from getting into, destroys the device.
Preferably, in the above high withstand voltage electromagnetic sensor, the electromagnetic sensor further includes a limiting plate, the limiting plate is fixed on the protective sleeve in a sleeving manner, and a plate surface of the limiting plate is perpendicular to an outer side wall of the protective sleeve; this scheme can be to the relative position with boats and ships and electrode restriction, guarantees the measuring accuracy nature.
Preferably, in the above-described high withstand voltage electromagnetic sensor, the housing and the watertight connector, and the electrode plate and the housing are sealed and fixed by an adhesive; this scheme can further realize whole device sealed, guarantees life, reduces the error.
Preferably, in the above high withstand voltage electromagnetic sensor, the electrode plate is sealed with the first electrode and the second electrode by a glass sintering sealing process; the scheme ensures that the electrode and the electrode plate are good in sealing performance and mutually insulated, so that the electromagnetic sensor is good in sealing performance and insulating performance under a high-voltage-resistant environment and is more resistant to seawater corrosion.
Preferably, in the above high withstand voltage electromagnetic sensor, the casing is cylindrical, an inner cavity of the casing is filled with an adhesive, and the casing, the watertight connector, the coil assembly and the electrode plate assembly are cured into an integral structure; the scheme can greatly improve the overall mechanical strength of the sensor, increase the structural strength and enhance the pressure resistance.
Preferably, in the above high withstand voltage electromagnetic sensor, an insulating layer is sprayed on the upstream surface of the electrode plate; this scheme can prevent that the electrode plate upstream face from passing through the induced potential that the magnetic induction line produced, superposes with the induced potential that the electrode point produced, causes the speed potential distortion of picking up, and then guarantees to detect the precision.
Preferably, in the above-mentioned high withstand voltage electromagnetic sensor, after the inner coil and the outer coil are wound, a glass cloth tape is wound around the outer surface of the inner coil and vacuum dip-coated with epoxy insulating varnish.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the high withstand voltage electromagnetic sensor of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic structural diagram of a coil assembly in the high voltage-withstanding electromagnetic sensor of the present invention;
fig. 4 is a cross-sectional view of a coil assembly in the high withstand voltage electromagnetic sensor of the present invention;
fig. 5-6 are schematic structural diagrams of the electrode plate assembly in the high withstand voltage electromagnetic sensor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Please refer to fig. 1-6, which illustrate an electromagnetic sensor with high withstand voltage according to the present invention, comprising:
the device comprises a shell 1, a protective sleeve 2, a watertight connector 3, a coil assembly 4 and an electrode plate assembly 5;
two ends of the shell 1 are provided with openings, and the two ends of the shell are respectively and correspondingly provided with a connector connecting end and an electrode plate component 5 connecting end; the watertight connector 3 is mounted at the connector connection end of the housing 1; the protective sleeve 2 is sleeved on the outer side of the watertight connector 3, one end of the protective sleeve is connected to the outer wall of the shell 1, and the other end of the protective sleeve is a free end;
the electrode plate assembly 5 includes an electrode plate 50 and an electrode 51; the top of the electrode plate 50 is arranged at the mounting end of the electrode plate component 5 of the shell 1; the electrode 51 is divided into a first electrode and a second electrode, both the first electrode and the second electrode are arranged on the end face of the outer side of the bottom of the electrode plate 50 and are electrically connected with the watertight connector 3 through a first electrode lead and a second electrode lead which correspond to each other respectively;
the coil assembly 4 is installed on one side of the electrode plate 50 corresponding to the inner cavity of the housing 1 and electrically connected with the watertight connector 3.
Specifically, the magnitude of the magnetic field intensity decreases with the increase of the distance between the electrode surface and the excitation coil, so the first electrode and the second motor are required to be arranged as close as possible to the coil assembly 4 in the design.
In the above embodiment of the present invention, the inner side end surface of the electrode plate 50 is provided with the annular protrusion, and the coil assembly 4 is bonded and fixed on the inner side of the annular protrusion.
In the above embodiment of the present invention, the coil assembly 4 includes a frame base 40, an outer frame 41, an inner frame 42, an outer coil 43, an inner coil 44, a one-way soldering lug 45, an inner shielding copper foil 46, and an insulating pad;
the framework seat 40 is a cylindrical structure with an opening at the bottom, the middle part of the framework seat is provided with a middle line pipe 400, and the middle line pipe 400 penetrates through the top wall of the framework seat 40; the outer framework 41 and the inner framework 42 are both annular, and the side walls are respectively provided with an annular groove correspondingly; the outer framework 41 is sleeved on the outer side of the framework seat 40; the inner framework 42 is sleeved between the middle line pipe 400 and the inner wall of the framework seat 40; the outer coil 43 is wound in the annular groove of the outer framework 41, and an outer wire I and an outer wire II are led out; the inner coil 44 is wound in the annular groove of the inner framework 42, and an inner wire lead I and an inner wire lead II are led out; the first inner wire lead is connected with the first outer wire lead, and the second outer wire lead is twisted with the first electrode lead and is electrically connected with the watertight connector 3; the internal wire lead II and the electrode lead II are twisted and then are electrically connected with the watertight connector 3;
the one-way soldering lug 45 is fixed on the top of the skeleton seat 40; an inner shielding copper foil 46 is adhered to the bottom surface of the inner frame 42; the insulating pad is bonded to the bottom surface of the inner shield copper foil 46; the inner shielding copper foil 46 is connected with the one-way soldering lug 45 through a conducting wire penetrating through the middle line pipe 400, and the one-way soldering lug 45 is connected with the ground wire of the watertight connector 3 through a conducting wire.
Specifically, the electrode plate 50 is made of titanium alloy, the thermal expansion coefficient α of titanium is about 9.41 × 10-6/degree centigrade, and is similar to that of soft glass with a thermal expansion coefficient α of 9 × 10-6/degree centigrade, and the difference Δ α is not more than 10% in the temperature range from room temperature to the softening point of glass, so that the sealing stress can be controlled in a safe range, and the stress can be rapidly eliminated by viscous flow above the softening point of glass, thereby forming reliable matching sealing.
In the above embodiment of the present invention, a sealing member is further included, and the sealing member is installed at the joint of the electrode plate 50 and the housing 1.
The utility model discloses an in the above-mentioned embodiment, still include limiting plate 6, 6 covers of limiting plate are established and are fixed on protective sheath 2, and its face is perpendicular with the lateral wall of protective sheath 2.
In the above embodiments of the present invention, the housing 1 and the watertight connector 3, and the electrode plate 50 and the housing 1 are sealed and fixed by the adhesive.
In the above embodiments of the present invention, the electrode plate 50 is sealed with the first electrode and the second electrode by a glass sintering sealing process.
Specifically, the electrode plate 50 is provided with corresponding inner holes corresponding to the positions of the first electrode and the second electrode, one ends of the first electrode and the second electrode penetrate through the inner holes, and a part of the first electrode and the second electrode are fixed in the inner holes; the surface of the inner hole and the surface of the electrode II are subjected to rough treatment, so that physical attachment is facilitated, and a transition oxide layer is formed on the surface, so that chemical attachment is facilitated; meanwhile, other element oxides are added into the glass structure to improve the wetting performance of the glass to the electrode plate and the electrode.
Specifically, an insulating layer is coated on the upstream surface of the electrode plate 50, so that induced potential generated when magnetic lines of force pass through the electrode plate 50 is prevented from being superposed on the induced potential generated by the electrode 51, and the picked-up speed potential is prevented from being distorted.
Specifically, the insulation property of the electrode plate is improved by spraying ceramic on the surface of the electrode plate, and the wear resistance and the corrosion resistance of the electrode plate are improved; for example, the aluminum oxide ceramic (Al2O3) has the characteristics of high hardness, good wear resistance, good chemical stability, good corrosion resistance and the like, and the aluminum oxide ceramic (Al2O3) is selected as a coating material according to the working environment and performance requirements of the electromagnetic sensor, and the surface of the electrode plate is sprayed by adopting a thermal spraying technology, so that the surface of the electrode plate is insulated, and the stability of the potential of the electrode point is ensured.
In the above embodiment of the present invention, the housing 1 is a cylinder, the inner cavity of the housing 1 is filled with an adhesive, and the housing 1, the watertight connector 3, the coil assembly 4 and the electrode plate assembly 5 are solidified into an integral structure.
Specifically, the shell 1 is in a cylinder form, and the opening diameter-changing position inside the shell 1 is in fillet transition, so that stress concentration is avoided. The electrode plate 50 and the shell 1 are connected by screw threads, the screw thread is sealed by gluing adhesive, and the electrode plate 50 and the end face of the shell 1 are sealed by sealing rings in an auxiliary way. In order to avoid influencing the sealing performance of the sealing ring, a normal-temperature bonding and encapsulating mode is adopted in the process; the electrode plate 50 is designed to be installed from the outside to the inside, so that the reliability of coping with the external pressure applied to a large depth of submergence is improved.
In the above embodiment of the present invention, after the inner coil 44 and the outer coil 43 are wound, the glass cloth tape is wound on the outer surface thereof, and the vacuum dipping treatment is performed through the epoxy insulating varnish.
Specifically, a watertight electric connector with the working depth of 450 meters underwater is adopted, the working temperature is-30-60 ℃, the watertight plug and the cable adopt a high-temperature vulcanization process, and the cable is a longitudinal watertight signal cable, so that the longitudinal sealing performance can be guaranteed to be withstand pressure of 6.75MPa and prevent leakage.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high withstand voltage electromagnetic sensor, characterized by comprising: the electrode plate comprises a shell (1), a protective sleeve (2), a watertight connector (3), a coil assembly (4) and an electrode plate assembly (5);
two ends of the shell (1) are provided with openings, and the two ends of the shell are respectively and correspondingly provided with a connector connecting end and an electrode plate component (5) connecting end; the watertight connector (3) is mounted at the connector connection end of the housing (1); the protective sleeve (2) is sleeved on the outer side of the watertight connector (3), one end of the protective sleeve is connected to the outer wall of the shell (1), and the other end of the protective sleeve is a free end;
the electrode plate assembly (5) comprises an electrode plate (50) and an electrode (51); the top of the electrode plate (50) is arranged at the mounting end of the electrode plate component (5) of the shell (1); the electrode (51) is divided into a first electrode and a second electrode, the first electrode and the second electrode are both arranged on the end face of the outer side of the bottom of the electrode plate (50) and are respectively and electrically connected with the watertight connector (3) through a first electrode lead and a second electrode lead which correspond to each other;
the coil assembly (4) is arranged on one side of the electrode plate (50) corresponding to the inner cavity of the shell (1) and is electrically connected with the watertight connector (3).
2. A high withstand voltage electromagnetic sensor according to claim 1, wherein an annular protrusion is provided on an inner side end surface of the electrode plate (50), and the coil block (4) is adhesively fixed on an inner side of the annular protrusion.
3. A high withstand voltage electromagnetic sensor according to claim 2, wherein the coil block (4) comprises a bobbin base (40), an outer bobbin (41), an inner bobbin (42), an outer coil (43), an inner coil (44), a one-way tab (45), an inner shielding copper foil (46), an insulating pad;
the framework seat (40) is of a cylindrical structure with an opening at the bottom, a middle line pipe (400) is arranged in the middle of the framework seat, and the middle line pipe (400) penetrates through the top wall of the framework seat (40); the outer framework (41) and the inner framework (42) are both annular, and the side walls of the outer framework and the inner framework are respectively provided with an annular groove correspondingly; the outer framework (41) is sleeved on the outer side of the framework seat (40); the inner framework (42) is sleeved between the middle line pipe (400) and the inner wall of the framework seat (40); the outer coil (43) is wound in the annular groove of the outer framework (41), and an outer wire I and an outer wire II are led out; the inner coil (44) is wound in the annular groove of the inner framework (42), and an inner wire lead I and an inner wire lead II are led out; the first inner wire lead is connected with the first outer wire lead, and the second outer wire lead is twisted with the first electrode lead and is electrically connected with the watertight connector (3); the internal wire lead II and the electrode lead II are twisted and then are electrically connected with the watertight connector (3);
the one-way soldering lug (45) is fixed at the top of the framework seat (40); the inner shielding copper foil (46) is adhered to the bottom surface of the inner framework (42); the insulating pad is bonded to the bottom surface of the inner shielding copper foil (46); interior shielding copper foil (46) with one-way soldering lug (45) are through running through the wire of middle part spool (400) is connected, one-way soldering lug (45) with the ground wire of watertight connector (3) passes through the wire and connects.
4. A high withstand voltage electromagnetic sensor according to claim 3, further comprising a sealing member installed at a junction of the electrode plate (50) and the case (1).
5. A high voltage withstand electromagnetic sensor according to claim 4, further comprising a limiting plate (6), wherein the limiting plate (6) is fixed on the protective sheath (2) in a sleeved manner, and a surface of the limiting plate is perpendicular to an outer side wall of the protective sheath (2).
6. A high withstand voltage electromagnetic sensor according to claim 5, wherein the housing (1) and the watertight connector (3) and the electrode plate (50) and the housing (1) are hermetically fixed by an adhesive.
7. A high withstand voltage electromagnetic sensor according to claim 6, wherein the electrode plate (50) is sealed with the first electrode and the second electrode by a glass frit sealing process.
8. A high voltage withstand electromagnetic sensor according to claim 7, wherein the casing (1) is cylindrical, and an inner cavity of the casing (1) is filled with an adhesive to cure the casing (1), the watertight connector (3), the coil assembly (4), and the electrode plate assembly (5) into an integral structure.
9. A high withstand voltage electromagnetic sensor according to claim 8, wherein the water-facing surface of the electrode plate (50) is coated with an insulating layer.
10. A high withstand voltage electromagnetic sensor according to claim 9, wherein after the inner coil (44) and the outer coil (43) are wound, a glass cloth tape is wound around the outer side thereof, and vacuum dip coating treatment is performed by epoxy insulating varnish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120014187.6U CN214310580U (en) | 2021-01-05 | 2021-01-05 | High-voltage-resistance electromagnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120014187.6U CN214310580U (en) | 2021-01-05 | 2021-01-05 | High-voltage-resistance electromagnetic sensor |
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| Publication Number | Publication Date |
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| CN214310580U true CN214310580U (en) | 2021-09-28 |
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| CN202120014187.6U Active CN214310580U (en) | 2021-01-05 | 2021-01-05 | High-voltage-resistance electromagnetic sensor |
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| CN (1) | CN214310580U (en) |
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- 2021-01-05 CN CN202120014187.6U patent/CN214310580U/en active Active
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