CN212844936U

CN212844936U - Faraday cage applied to electrolyte environment

Info

Publication number: CN212844936U
Application number: CN202021995096.7U
Authority: CN
Inventors: 张兴莉
Original assignee: 张兴莉
Current assignee: Li Tao
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-03-30
Anticipated expiration: 2030-09-11

Abstract

The utility model relates to an electrochemistry technical field, more specifically relates to a be applied to faraday cage of electrolyte environment. The method is used for solving various electromagnetic interference problems existing in the electrolyte environment. The Faraday cage applied to the electrolyte environment comprises an outer metal gauze, a cage body and an inner metal gauze, wherein the outer metal gauze is of a three-layer structure; the outer metal gauze is arranged on the outer wall of the cage body, and the inner metal gauze is arranged on the inner wall of the cage body; the cage body is made of non-conductive non-metallic materials; the inner metal gauze and the outer metal gauze are made of metal materials with strong conductivity. When the Faraday cage is applied to an electrolyte environment, the Faraday cage has the technical effect of full electromagnetic shielding.

Description

Faraday cage applied to electrolyte environment

Technical Field

The utility model relates to an electrochemistry technical field, more specifically relates to a be applied to faraday cage of electrolyte environment.

Background

First, Faraday cage

A Faraday Cage (Cage) is a Cage formed of metal or good conductor named electromagnetic founder, uk physicist michael-Faraday last name, a device used to demonstrate principles of equipotential, electrostatic shielding and high voltage live operation. Historically, faraday has been a famous faraday cage experiment, after a metal cover is grounded, the faraday is covered in the metal cover, a power supply with hundreds of thousands of high voltage is connected outside the metal cover, and the faraday is not damaged in the metal cover. This experiment shows that the person inside the metal enclosure is not affected by the electric field. This is because the cage is connected to the ground, and the cage is an equal potential, the internal potential is zero, and the electric field is zero, depending on the condition of electrostatic balance of the ground conductor. Therefore, no matter how high the voltage is on the cage body, all parts on the human body in the cage are also provided with the same voltage, the voltage between the cage body and the human body is equipotential, and no current flows through the human body.

The outer shell of the conductor "shields" its interior from external electric fields, a phenomenon known as electrostatic shielding. The electrostatic shield is divided into an outer shield and a full shield. The cavity conductor is in electrostatic equilibrium in the external electric field, and the field strength inside the cavity conductor is always equal to zero. Therefore, the external electric field cannot have any influence on the internal space thereof. If there is a charged body in the cavity conductor, the inner surface of the cavity conductor will generate an equal amount of opposite sign induced charges when the static electricity is balanced. If the shell is not grounded, the outer surface of the shell can generate inductive charges which are the same as and have the same number as the internal charged body, the electric field of the inductive charges influences the outside, and at the moment, the cavity conductor can only shield the external electric field but cannot shield the influence of the internal charged body on the outside, so the shell is called as external shielding. However, if the housing is grounded, even if a charged body exists inside, the algebraic sum of the charges induced on the inner surface and the charges charged on the charged body is zero, and the induced charges generated on the outer surface flow into the ground through the ground wire. The external environment can not influence the inside of the shell, and the influence of the internal charged body on the external environment is eliminated, so the shielding is called full shielding. People use the principle of electrostatic shielding to make high-voltage live operation protective clothing, the whole protective clothing is made of metal wires, when live works, the protective clothing is in good contact with a live body, so that the current flowing through the human body during the operation is almost zero, and the current completely passes through the protective clothing, thereby reducing the risk of electric shock of people. The car also behaves in practice as a faraday cage and is not hit by lightning in the car.

For a specific application of the electrostatic shielding principle, it is also necessary to note: (1) in practical application, the metal gauze is used to replace the metal shell to achieve similar electrostatic shielding effect, but the shielding effect of the metal gauze is not completely thorough. (2) In electrostatic equilibrium, no charge flows in the ground line, but if the charge inside the shielded enclosure changes over time, or the charge near the charged body outside the enclosure changes over time, there will be a current in the ground line. The shield may also present residual charges, in which case the shielding will again be incomplete and incomplete.

Second, direct current potential difference meter based on adjustable balance principle design

A dc potentiometer is an instrument constructed using the compensation principle. The compensation method is characterized in that current is not taken from a measuring object, so that the measured value is not interfered, and the measuring result is accurate and reliable. When no current flows, the potential difference between the positive and negative electrodes of the battery is equal to the electromotive force of the battery. If current flows, there is a certain voltage drop in the internal resistance of the battery (as is the case when the voltage between the two poles of the battery is measured by a voltmeter), and the voltage measured at this time is no longer the electromotive force of the battery, but only the terminal voltage. If the measurement can be performed when no current flows, the electromotive force can be directly measured. One such method is the compensation method.

The direct current potential difference meter is matched with appliances such as a standard battery and a standard resistor, so that the direct current potential difference meter can measure electrical quantities such as electromotive force, potential difference (voltage), current, resistance and the like with high accuracy; and various transducers are matched, and the device can also be used for measuring and controlling non-electric quantities such as temperature, displacement and the like. The potentiometer is divided into a direct current potentiometer and an alternating current potentiometer. With the continuous development and perfection of the theory and technology of the direct current comparator, a direct current comparator type direct current potentiometer with high accuracy appears, and the measurement error of the direct current comparator type direct current potentiometer is about one millionth order of magnitude. The AC potentiometer is used for measuring the sine AC voltage from power frequency to audio frequency, but only products for power frequency exist in the market, and the AC potentiometers with other frequencies are required to be designed and manufactured by themselves.

The traditional direct current potential difference meter is generally mechanical, is complex to use, slow in measurement speed, high in price and multiple in influencing factors of the measurement process, so that the direct current potential difference meter is generally only used in occasions such as laboratories or instrument correction, and is rarely used in field environments. However, with the continuous progress of electrical and electronic technology, many commercial digital dc potentiometers have appeared, which basically solve the disadvantages of the mechanical dc potentiometers. The digital DC potentiometer adopts advanced digitization and intelligent technology to combine with the traditional technology, completely covers the novel product of the original DC potentiometer in use function, and can precisely detect millivolt signals output by primary instruments such as thermocouples, sensors, transmitters and the like.

Thirdly, the natural corrosion potential E of the metal material under the environment of the electrolyte_{1 steel}Measurement of

When a metal material (such as a steel member) is in an electrolyte environment, an electric double layer interface is formed on the contact surface of the steel material surface and the electrolyte, and atoms of the metal chemically react with the electrolyte at the electric double layer interface to generate a polarization potential E_SteelThis polarization potential is referred to as the natural corrosion potential, referred to herein as E_{1 steel}. Measuring the natural corrosion potential E of a steel member in an electrolyte environment_{1 steel}It is one of the basic conditions for the application of cathodic protection technology.

To measure E_{1 steel}Another reference electrode is introduced, the polarization potential E of which is required_{Ginseng radix (Panax ginseng C.A. Meyer)}Known and stable. Measuring the DC potential difference E between a steel component and a reference electrode with a meter_{1 steel}－E_{Ginseng radix (Panax ginseng C.A. Meyer)}The natural corrosion potential E can be calculated_{1 steel}Numerical values. As shown in detail in fig. 2.

In current practice, a voltmeter is generally used as a measuring instrument between two electrodes. The positive electrode of the voltmeter is required to be electrically connected with the steel component, the negative electrode of the voltmeter is electrically connected with the reference electrode, a closed measuring loop with an electronic circuit and an ionic circuit is formed, and a measuring current I is formed in the loop_Measuring. Reading V of the voltmeter at this time_{Voltage meter}Actually, the voltage at the end of the line is analyzed to obtain V_{Voltage meter}＝I_Measuring×R_{Voltage meter}＝(E_{1 steel}－E_{Ginseng radix (Panax ginseng C.A. Meyer)})－I_Measuring×R_uWhich read outNot intended by the measurer (E)_{1 steel}－E_{Ginseng radix (Panax ginseng C.A. Meyer)}) The inside also contains an influencing factor I_Measuring×R_u. V in the above formula_{Voltage meter}Is the reading of the voltmeter; e_{1 steel}The steel member is in the electrolyte environment, and the natural corrosion potential is generated due to natural corrosion; e_{Ginseng radix (Panax ginseng C.A. Meyer)}The reference electrode is a natural corrosion potential generated by the natural corrosion action in the electrolyte environment; i is_MeasuringIs the current flowing in the measurement circuit; r_uIs the ionic circuit resistance between the measured electrode and the reference electrode; r_{Voltage meter}To measure the internal resistance of the voltmeter.

In practical application, if the internal resistance R of the voltmeter is_{Voltage meter}Higher, up to R_{Voltage meter}＞R_uAt x 1000, I_Measuring×R_uCan be ignored and considered as the voltage meter measured value V_{Voltage meter}≈(E_{1 steel}－E_{Ginseng radix (Panax ginseng C.A. Meyer)}). At the current electronic industry level, the resistance of the digital voltmeter reaches 10 basically⁷～10⁹Is much larger than R_{Voltage meter}＞R_uRequirement for x 1000 (R)_uTypically hundreds or thousands of ohms) so that the measurement accuracy requirement can be satisfied by using a digital voltmeter with high internal resistance under a two-electrode system.

When a balance-adjustable DC potentiometer is selected to replace a voltmeter as a measuring instrument, the internal resistance of the DC potentiometer tends to infinity, a measuring circuit forms a virtual break condition, and the measuring current I can be considered to be measured_MeasuringIs not present at this time, resulting in I_Measuring×R_uAt the same time, it does not exist, so that the reading E of the direct current potential difference meter_{DC potentiometer}＝(E_{1 steel}－E_{Ginseng radix (Panax ginseng C.A. Meyer)})。

Fourthly, the polarized electrode in the electrolyte environment has influence on the electrolyte environment and other metal materials in the environment

When an electrode is polarized in an electrolyte environment (e.g., an anode in an external power supply cathode protection system) or a metal body is polarized by other charged bodies (e.g., a drain body in a drain system), current flows from the electrode or into the electrolyte environment at an electric double layer interface formed at the interface of the electrode surface and the electrolyte.

These currents, flowing in or out, can cause unpredictable corrosion risks to the metal materials near the electrode, such as the anode in the externally applied power cathode protection system, which can be a source of dc stray current interference from other nearby metal materials not protected by the cathode protection system; the drainage fluid in the drainage system also becomes a direct current (or alternating current) stray current interference source of other nearby metal materials which are not protected by the cathode protection system, and the corrosion rate of the metal materials is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned prior art's at least one defect (not enough), a be applied to the faraday cage of electrolyte environment is provided, a problem for solve various electromagnetic interference that exist in the electrolyte environment, when being used for the electrolyte environment in order to realize, full electromagnetic shielding's technological effect has, both can ensure the faraday cage promptly and go out various electromagnetic interference factors in the electrolyte environment now, can not be to arranging the electrode in the faraday cage, the electrolyte environment produces electromagnetic interference, also can let the electrode of arranging in the faraday cage simultaneously, can not be to the outer electrode of faraday cage, the electrolyte environment produces electromagnetic interference.

The technical scheme adopted by the utility model is that the Faraday cage applied to the electrolyte environment comprises an outer metal gauze, a cage body and an inner metal gauze three-layer structure; the outer metal gauze is arranged on the outer wall of the cage body, and the inner metal gauze is arranged on the inner wall of the cage body; the cage body is made of non-conductive non-metal materials, and the inner metal gauze and the outer metal gauze are made of metal materials with strong conductivity.

Further, the faraday cage is a cage structure, as shown in fig. 1. The cage wall comprises a cage body, an inner metal gauze laid on the inner wall of the cage body, an outer metal gauze laid on the outer wall of the cage body and the like.

Furthermore, the cage body is made of non-conductive non-metallic materials, such as various plastic materials with better corrosion resistance; the strength is required to be sufficient, and the steel plate is not easy to deform or damage during working; the inner and outer metal gauze screens are made of metal materials with strong conductivity, such as various stainless steel or copper materials with better corrosion resistance; the strength is required to be sufficient, and the steel plate is not easy to damage during working; the inner/outer metal screens are all multi-layered.

Furthermore, holes are formed in the cage body, and yarn holes are formed in the inner metal gauze and the outer metal gauze and can ensure that electrolyte freely enters or flows out of the Faraday cage; the cage body is provided with holes with proper sizes, and the inner and outer metal gauze nets also require that the mesh density is as fine as possible; the holes, the meshes of the inner metal gauze and the meshes of the outer metal gauze are combined to allow electrolyte in a working environment to smoothly enter or flow out of the inner space of the Faraday cage, so that the electrodes arranged in the cage and outside the cage work in the same electrolyte environment.

Furthermore, the inner metal gauze and the outer metal gauze are separated by the cage body and are not contacted with each other; the inner metal gauze and the outer metal gauze are not contacted with other conductive materials; the inner side of the inner metal gauze and the outer side of the outer metal gauze are provided with protective layers; the protective layer is made of non-conductive materials and is provided with holes the same as those on the cage body. The cage requires that the inner and outer metal gauze do not contact any metal object or electrode when in use, in order to ensure the achievement of the requirement, the utility model discloses in recommend in the inboard of inner metal gauze, the outside of outer metal gauze all increase the protective layer of making with non-conductive material, also have the hole the same with on the cage body above these two protective layers.

Further, the inner and outer metallic screens of the faraday cage are both effectively grounded, so that the faraday cage has a full shielding property in an electrolyte environment.

Furthermore, the inner metal gauze and the outer metal gauze are respectively provided with more than two layers and are separated by the cage body, so that the inner metal gauze and the outer metal gauze are ensured not to be contacted, and the inner metal gauze and the outer metal gauze form a double-layer Faraday cage structure, so that the problems that the Faraday cage formed by a single layer of metal gauze is incomplete and incomplete when shielding electromagnetic interference are effectively eliminated. Practical tests prove that the electromagnetic shielding capability of the cage completely meets the requirements of cathode protection in practical work.

Further, if a higher level of shielding effect is to be achieved, the number of layers of the metal gauze can be increased, from double layers to three layers, or even more.

Furthermore, the Faraday cage applied to the electrolyte environment can accurately measure the natural corrosion potential of the metal in the electrolyte environment by combining the reference electrode and the measured metal test piece. Meanwhile, the Faraday cage applied to the electrolyte environment can be used for performing harmless treatment on the anode in an external power supply anode system and performing harmless treatment on a drainage fluid in a drainage system.

Further, such a faraday cage is completely immersed in an electrolyte environment when in use.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model designs three-layer structure of outer metal gauze, cage body and inner metal gauze, wherein the cage body adopts non-conductive non-metallic material, and the inner metal gauze and the outer metal gauze adopt metal material with strong conductivity, so as to realize the technical effect of shielding electromagnetic interference; meanwhile, more than two layers of metal gauze are designed in a matching way, and protective layers are arranged on the inner side of the inner metal gauze and the outer side of the outer metal gauze so as to enhance the electromagnetic shielding effect of the Faraday cage applied to the electrolyte environment; both the inner and outer metal screens are in fact grounded to achieve the technical effect of full electromagnetic shielding.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a method for measuring the potential of a lower electrode in a two-electrode system.

Fig. 3 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.

Description of reference numerals: the device comprises a Faraday cage 1, a cage body 2, a hole 3, an inner metal gauze 4, an outer metal gauze 5, an underground water line 7, an electrode 8, a drainage body 10, a direct current potential difference meter 11, a measured metal test piece 12, a reference electrode 13, a potentiometer 21, a polarized electrode 22 and a polarized electrode 23.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

The external shielding function of the Faraday cage is utilized, and the reference electrode is combined to accurately measure the natural corrosion potential E of the metal in the electrolyte environment_{1 steel}。

As shown in fig. 1, the faraday cage applied to the electrolyte environment in the present embodiment includes three layers of an outer metal gauze 5, a cage body 2 and an inner metal gauze 4; the outer metal gauze 5 is arranged on the outer wall of the cage body 2, and the inner metal gauze 4 is arranged on the inner wall of the cage body 2; the cage body 2 is made of a non-conductive non-metal material, and the inner metal gauze 4 and the outer metal gauze 5 are made of metal materials with strong conductivity. The faraday cage 1 is a cage-like structure, as shown in fig. 1. The cage wall comprises a cage body 2, an inner metal gauze 4 laid on the inner wall of the cage body, an outer metal gauze 5 laid on the outer wall of the cage body and the like. The cage body 2 is made of non-conductive non-metallic materials, such as various plastic materials with better corrosion resistance; the strength is required to be sufficient, and the steel plate is not easy to deform or damage during working; the inner metal gauze and the outer metal gauze are both made of metal materials with strong conductivity, for example, various stainless steel or copper materials with better corrosion resistance are adopted; the strength is required to be sufficient, and the steel plate is not easy to damage during working; the inner metal gauze and the outer metal gauze are both provided with a plurality of layers.

More specifically, holes 3 are formed in the cage body 2, and yarn holes are formed in the inner metal gauze 4 and the outer metal gauze 5, so that the holes 3 and the yarn holes can ensure that electrolyte freely enters or flows out of the Faraday cage 1; the cage body 2 is provided with holes 3 with proper sizes, and the inner metal gauze and the outer metal gauze are also required to have the mesh density as fine as possible; the holes 3, the inner metal gauze 4 and the outer metal gauze 5 are combined to allow electrolyte in a working environment to smoothly enter or flow out of the inner space of the Faraday cage 1, so that the electrodes arranged in the cage and outside the cage work in the same electrolyte environment. The inner metal gauze 4 and the outer metal gauze 5 are separated by the cage body 2 and are not contacted with each other; the inner metal gauze 4 and the outer metal gauze 5 are not contacted with other conductive materials; the inner side of the inner metal gauze 4 and the outer side of the outer metal gauze 5 are provided with protective layers; the protective layer is made of non-conductive material and is provided with holes 3 which are the same as those on the cage body 2. This kind of Faraday cage 1 in use requires that interior metal gauze and outer metal gauze do not contact any metal object or electrode, in order to guarantee the achievement of this requirement, the utility model discloses in recommend in the inboard of interior metal gauze 4, the outside of outer metal gauze 5, all increase the protective layer of using non-conductive material to make, also have the hole 3 the same on these two protective layers with the cage 2.

The inner metal gauze 4 and the outer metal gauze 5 of the faraday cage are both in fact grounded, so that the faraday cage has the property of full shielding in an electrolyte environment. The inner metal gauze 5 and the outer metal gauze 5 are both provided with more than two layers and are separated by the cage body, so that the inner metal gauze and the outer metal gauze are ensured not to be contacted, the inner metal gauze 4 and the outer metal gauze 5 form a double-layer Faraday cage structure, and the problems that the Faraday cage formed by single-layer metal gauze is incomplete and incomplete when shielding electromagnetic interference are effectively eliminated. Practical tests prove that the electromagnetic shielding capability of the cage completely meets the requirements of cathode protection in practical work. If a higher level of shielding effect is to be achieved, the number of layers of metal gauze can be increased, from double layers to three layers, or even more.

As shown in fig. 3, the specific application scenario of accurately measuring the natural corrosion potential E1 steel of metal in the electrolyte environment by using the external shielding function of the faraday cage and combining with a reference electrode is as follows: in the actual working environment of the plant,a great deal of external electromagnetic interference often exists in the electrolyte environment, which causes the potentials of the measured metal test piece 12 and the reference electrode 13 to change in a large range, so that the natural corrosion potential E_{1 steel}The measurement work of the Faraday cage is not carried out, and the measured data are seriously deviated from normal values, so that the first use scene of applying the Faraday cage is provided for the situation, and the phenomenon of the electromagnetic interference measurement work is shielded by utilizing the external electromagnetic shielding characteristic of the Faraday cage.

Installing a metal test piece 12 to be measured and a reference electrode 13 in the Faraday cage 1, and ensuring that the metal test piece 12 to be measured and the reference electrode 13 are not contacted with the inner metal gauze 4; the Faraday cage 1, the measured metal test piece 12 and the reference electrode 13 are completely immersed in an electrolyte environment; between the metal test piece 12 to be measured and the reference electrode 13, a direct current potentiometer 11 is provided.

Due to the external shielding function of the faraday cage 1, various electromagnetic interferences in the electrolyte environment outside the cage cannot affect the potentials of the measured metal test piece 12 and the reference electrode 13, the potential of the measured metal test piece 12 inside the cage is only determined by the chemical properties of the metal material and the specific conditions of the electrolyte, and the potential of the reference electrode is only determined by the initial design of the reference electrode and cannot be affected by various electromagnetic interferences in the environment.

According to the previous analysis, the direct current potentiometer 11 does not form a measuring loop and also causes no measuring current to be formed, so that the solution resistance R between the reference electrode 13 and the measured metal test piece 12 does not exist in the reading_uAnd measuring the current I_MeasuringThe voltage change formed together, the reading of the DC potentiometer is directly equal to the natural corrosion potential E of the steel material to be measured_{1 steel}。

In this application scenario, the dc potentiometer 11 can be replaced by a digital dc voltmeter with large internal resistance, but the measurement result includes the solution resistance R between the reference electrode 13 and the measured metal test piece 12_uAnd measuring the current I_MeasuringTogether with the resulting measurement error.

The utility model designs the three-layer structure of the outer metal gauze 5, the cage body 2 and the inner metal gauze 4, wherein the cage body 2 adopts non-conductive non-metallic materials, and the inner metal gauze and the outer metal gauze adopt metal materials with strong conductivity, so as to realize the technical effect of shielding electromagnetic interference; meanwhile, more than two layers of metal gauze are designed in a matching way, and protective layers are arranged on the inner side of the inner metal gauze 4 and the outer side of the outer metal gauze 5 so as to enhance the electromagnetic shielding effect of the Faraday cage applied to the electrolyte environment; both the inner and outer metal screens are in fact grounded to achieve the technical effect of full electromagnetic shielding.

Example 2

And the anode in the external power supply anode system is subjected to harmless treatment by utilizing the full shielding function of the Faraday cage.

As shown in fig. 4, the specific application scenarios of harmless treatment of the anode in the externally applied power supply anode system by using the full shielding function of the faraday cage are as follows: when the external power supply anode system is applied in an actual working environment, the external power supply anode often becomes a source of direct current stray interference of other metal materials which are located in the working range of the system and are not protected by the system, and the corrosion speed of the metal materials is greatly accelerated. Therefore, a second use scene applying the Faraday cage is provided for the situation, and the problem that an external power supply anode becomes a direct current stray interference source of a nearby metal piece is solved by utilizing the full electromagnetic shielding characteristic of the Faraday cage.

An external power supply anode 23 and a polarized electrode 22 are both arranged in the Faraday cage, and both the electrodes are ensured not to contact the inner metal gauze 4; the faraday cage 1 and both electrodes are completely immersed in the electrolyte environment.

Due to the full shielding function of the Faraday cage, the external power supply anode 23 and the polarized electrode 22 can not cause electromagnetic interference to the electrodes and electrolyte environments outside the Faraday cage 1, so that all the charged electrodes arranged in the Faraday cage can not be the interference sources of stray currents of other nearby metal objects, and the harmless application of the external power supply anode system 23 is realized.

In this case, the faraday cage 1 also shields stray currents in the electrolyte environment outside the cage at the same time, and the electrode and electrolyte environment inside the cage are not affected by these electromagnetic interferences.

The utility model designs the three-layer structure of the outer metal gauze 5, the cage body 2 and the inner metal gauze 4, wherein the cage body 2 adopts non-conductive non-metallic materials, and the inner metal gauze and the outer metal gauze adopt metal materials with strong conductivity, so as to realize the technical effect of shielding electromagnetic interference; meanwhile, more than two layers of metal gauze are designed in a matching way, and protective layers are arranged on the inner side of the inner metal gauze 4 and the outer side of the outer metal gauze 5 so as to enhance the electromagnetic shielding effect of the Faraday cage applied to the electrolyte environment; the outer metal gauze 5 and the inner metal gauze 4 are both actually grounded, and the technical effect of full electromagnetic shielding is ensured.

Example 3

And the total shielding function of the Faraday cage is utilized to carry out innocent treatment on drainage fluid in the drainage system.

As shown in fig. 5, the specific application scenarios of performing harmless treatment on the drainage fluid 10 in the drainage system by using the full shielding function of the faraday cage are as follows: when the drainage system is applied in an actual working environment, the drainage body 10 of the drainage system may become a source of dc stray interference or ac stray interference of other nearby metal materials, and may also cause a great increase in corrosion rate of other metal materials. Therefore, a third use scenario applying the faraday cage is provided for the situation, and the problem that the drainage fluid 10 becomes a direct current stray interference source or alternating current stray interference of a nearby metal piece is solved by utilizing the full electromagnetic shielding property of the faraday cage.

Installing a drainage fluid 10 inside the faraday cage 1 and ensuring that the drainage fluid 10 does not contact the inner metal gauze 4; both the faraday cage 1 and the drainage fluid 10 are completely immersed in the electrolyte environment.

Because of the full shielding function of the Faraday cage 1, the drainage fluid 10 can not affect the environment of electrodes and electrolyte outside the Faraday cage, and the charged electrodes arranged in all the cages can not be the interference source of stray current of other nearby metal objects, thereby realizing the harmless application of the drainage system.

In this case, the faraday cage also shields stray currents in the electrolyte environment outside the cage, and the drainage fluid 10 inside the cage is not affected by these electromagnetic interferences, preventing the drainage fluid 10 from being a passage for external stray interferences to enter the steel member.

The utility model designs the three-layer structure of the outer metal gauze 5, the cage body 2 and the inner metal gauze 4, wherein the cage body 2 adopts non-conductive non-metallic materials, and the inner metal gauze and the outer metal gauze adopt metal materials with strong conductivity, so as to realize the technical effect of shielding electromagnetic interference; meanwhile, more than two layers of metal gauze are designed in a matching way, and protective layers are arranged on the inner side of the inner metal gauze 4 and the outer side of the outer metal gauze 5 so as to enhance the electromagnetic shielding effect of the Faraday cage applied to the electrolyte environment; the outer metal gauze 5 and the inner metal gauze 4 are both actually grounded, so that the technical effect of full electromagnetic shielding is realized.

Obviously, the above embodiments of the present invention are only examples for clearly illustrating the technical solution of the present invention, and are not limitations to the specific embodiments of the present invention, such as the system is also suitable for cathodic protection of steel materials in electrolyte environment, and can even be extended to cathodic protection of other metal materials in electrolyte or electrolyte environment. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Faraday cage applied to an electrolyte environment is characterized by comprising an outer metal gauze (5), a cage body (2) and an inner metal gauze (4) which are of a three-layer structure; the outer metal gauze (5) is arranged on the outer wall of the cage body (2), and the inner metal gauze (4) is arranged on the inner wall of the cage body (2); the cage body (2) is made of a non-conductive non-metal material, and the inner metal gauze (4) and the outer metal gauze (5) are made of metal materials with strong conductivity; the Faraday cage (1) is used for shielding electromagnetic interference inside the cage to the outside of the cage and electromagnetic interference outside the cage to the inside of the cage, namely, electromagnetic mutual interference inside the cage and outside the cage is avoided.

2. A faraday cage for application in an electrolyte environment according to claim 1, characterized in that said inner (4) and outer (5) metallic screens are separated by a cage body (2) and do not touch each other; the inner metal gauze (4) and the outer metal gauze (5) are not in contact with the conductive material.

3. A faraday cage for application in an electrolyte environment according to claim 2, characterized in that said inner (4) and outer (5) metallic screens are provided with more than two layers.

4. A faraday cage for application in an electrolyte environment according to claim 1, characterized in that holes (3) are provided in the cage body (2), and that apertures are provided in the inner (4) and outer (5) metal screens, said holes (3) and apertures ensuring free ingress or egress of electrolyte into the faraday cage.

5. A Faraday cage for application in an electrolyte environment according to claim 4, wherein the inner side of the inner metallic gauze (4), the outer side of the outer metallic gauze (5) is provided with a protective layer; the protective layer is made of non-conductive materials and is provided with holes the same as those on the cage body (2).

6. A Faraday cage for application in an electrolyte environment according to claim 5, characterized in that both the inner (4) and outer (5) metallic screens are in fact grounded.

7. A Faraday cage according to any of claims 1-6, wherein the Faraday cage is completely immersed in an electrolyte environment when in use.