High voltage power distribution cabinet with good shielding performance

A high-voltage power distribution cabinet, shielding performance technology, applied in the fields of magnetic field/electric field shielding, electrical components, layered products, etc., can solve problems such as inconvenience of use, reduce the interference of electrical equipment, excellent shielding efficiency, high permeability Effect

Inactive Publication Date: 2016-05-11

邱炎新

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AI-Extracted Technical Summary

Problems solved by technology

At the same time, since the high-voltage power distribution cabinet is an electric device, the c...

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Abstract

The invention discloses a high voltage power distribution cabinet with good shielding performance. An electromagnetic shielding cover body is attached to the surface of the cabinet body of the high voltage power distribution cabinet. The cover body has a sandwich structure, and particularly, a layer of foam aluminum-copper-nickel alloy is clamped between two layers of permalloy plates. Electromagnetic waves in a low frequency band and a high frequency band can be well shielded, electromagnetic radiation of the high voltage power distribution cabinet can be prevented from polluting the environment, and interference of external electromagnetic waves on electrical equipment inside the power distribution cabinet can be reduced; and further, after the surface of the permalloy plate of the cover body is subjected to hydrochloric acid treatment, a nanoplate super hydrophobic structure is formed, self-cleaning, anti-fog, anti-freezing and anti-corrosion protection roles can be played, and the service life of the high voltage power distribution cabinet can be prolonged.

Application Domain

Magnetic/electric field screeningMetal layered products

Technology Topic

Copper nickel alloyLow frequency band +15

Image

Examples

Experimental program(5)

Example Embodiment

[0043] Example 1

[0044] A high-voltage power distribution cabinet with good shielding performance, the surface of the high-voltage power distribution cabinet (10) is pasted with an electromagnetic shielding cover (20), and the cover (20) is made of permalloy plate (01) and The foamed aluminum-copper-nickel alloy (02) realizes the electromagnetic shielding function, and at the same time, the surface of the cover (20) is treated with hydrochloric acid to form a super-hydrophobic structure of nanosheets, which plays a role of self-cleaning and anti-corrosion protection.

[0045]The cover body is a sandwich structure, specifically two layers of permalloy plates (01) sandwiching a layer of foamed aluminum-copper-nickel alloy (02); the thickness of the permalloy plate (01) is 0.5mm, the The surface of the permalloy plate (01) is covered by a nanosheet structure; the ratio of Ni and Fe in the permalloy plate (01) is 2:3, and the mass fractions of 0.5% and 1% of Mo and Si elements are added The thickness of the foamed aluminum-copper-nickel alloy (02) is 3mm, and the content of nickel in the foamed aluminum-copper-nickel alloy (02) is about 5% to 40%; the nanosheet structure is the permalloy Plate (01) was modified by hydrochloric acid and low surface energy heptadecafluorodecyl trimethyltryptophan silane.

[0046] Preferably, the making of the cover includes the following steps:

[0047] Step 1, the preparation of permalloy plate;

[0048] 1) Determination of Ni content

[0049] Abandon the traditional medium-nickel alloy and high-nickel alloy, adopt a low-nickel alloy with a Ni content of 40%, and add Mo and Si elements with a mass fraction of 0.5% and 1% respectively. The role of Mo is mainly to increase the resistance of the material rate, the role of Si element is mainly to increase the magnetic saturation;

[0050] 2) rolling

[0051] Mix Ni and Fe in the molten state according to the ratio of 2:3, and add Mo and Si elements with mass fractions of 0.5% and 1% respectively, and obtain permalloy plates through smelting and melting method and rolling;

[0052] 3) heat treatment

[0053] Heat treatment is divided into annealing, quenching and tempering, and final cooling stage; annealing stage: Permalloy is annealed at 1000-1300 °C for 5 hours in a protective helium atmosphere; quenching and tempering stage: reasonable and effective water-cooling equipment can make the alloy be strongly cooled, Then tempering at a high temperature of 600°C can improve the shielding performance of the permalloy plate and improve its shielding effectiveness; the final cooling stage: naturally cool down in a protective helium atmosphere, and obtain the permalloy plate after cooling;

[0054] Step 2, the treatment of the surface hydrophobic structure of the permalloy plate;

[0055] 1) Put the permalloy plate into acetone, ethanol, and deionized water for 30 minutes, and then dry it with nitrogen;

[0056] 2) Prepare 26.5% hydrochloric acid solution first, then put it into HF (38w%) solution, stir evenly, put Permalloy into the solution, treat it in a constant temperature water bath at 75°C for 10 hours, take it out, then rinse it with a large amount of water and put it into a drying box Dry to obtain the nanosheet structure on the permalloy surface;

[0057] 3) Soak the hydrochloric acid-treated permalloy in sodium laurate modification solution (29 mg/mL), and keep it in a drying oven at 90°C for 4 hours to complete the low surface energy modification of the permalloy surface;

[0058] Step 3, preparation of foamed aluminum-copper-nickel alloy;

[0059] 1) Heat metal aluminum, copper and nickel to molten state respectively, and form a metal mixture according to the ratio of 1:2:2;

[0060] 2) Add calcium metal to the mixed metal liquid for stirring, and adjust the viscosity of the metal in the molten state to increase the viscosity of the melt. This step is very important for the formation of metal foam. Only when the viscosity is appropriate, the bubbles will not disappear. as to escape;

[0061] 3) When the viscosity is suitable for foaming, ZrH 2 Bubble into molten metal as a foaming agent, mix the foaming agent and molten metal fully and evenly by stirring, and release H in the heated viscous molten metal 2 , the molten metal expands, and foamed aluminum-copper-nickel alloy is obtained after cooling;

[0062] Step 4, preparation of the electromagnetic shielding cover;

[0063] 1) Cutting the foamed aluminum-copper-nickel alloy into a plate material;

[0064] 2) Apply adhesive on both sides of the foamed aluminum-copper-nickel alloy, and bond the permalloy plate with it to complete the manufacture of the broadband electromagnetic shielding cover.

[0065] Test Data

[0066] First test the hydrophobic performance of the cover. When the permalloy plate is treated in the modification solution for 4 hours, its contact angle is 166 degrees, and the rolling angle is less than 5 degrees; aluminum, copper, nickel in foamed aluminum-copper-nickel alloy When the mass ratio is 1:2:2, the electromagnetic shielding test of the cover shows that its electromagnetic shielding effectiveness is as high as 98dB.

[0067] The test results show that the cover has a good super-hydrophobic effect, can play the role of self-cleaning, anti-fog and anti-freezing, protect and clean the high-voltage power distribution cabinet, and improve the service life of the high-voltage power distribution cabinet;

[0068] In terms of electromagnetic shielding, the electromagnetic shielding efficiency is as high as 98dB, which can protect the electronic components inside the high-voltage power distribution cabinet from the interference of external electromagnetic waves, and at the same time, its own electromagnetic wave shielding also reduces the electromagnetic pollution of the environment.

Example Embodiment

[0069] Example 2

[0070] A high-voltage power distribution cabinet with good shielding performance, the surface of the high-voltage power distribution cabinet (10) is pasted with an electromagnetic shielding cover (20), and the cover (20) is made of permalloy plate (01) and The foamed aluminum-copper-nickel alloy (02) realizes the electromagnetic shielding function, and at the same time, the surface of the cover (20) is treated with hydrochloric acid to form a super-hydrophobic structure of nanosheets, which plays a role of self-cleaning and anti-corrosion protection.

[0071] The cover body is a sandwich structure, specifically two layers of permalloy plates (01) sandwiching a layer of foamed aluminum-copper-nickel alloy (02); the thickness of the permalloy plate (01) is 0.5mm, the The surface of the permalloy plate (01) is covered by a nanosheet structure; the ratio of Ni and Fe in the permalloy plate (01) is 2:3, and the mass fractions of 0.5% and 1% of Mo and Si elements are added The thickness of the foamed aluminum-copper-nickel alloy (02) is 3mm, and the content of nickel in the foamed aluminum-copper-nickel alloy (02) is about 5% to 40%; the nanosheet structure is the permalloy Plate (01) was modified by hydrochloric acid and low surface energy heptadecafluorodecyl trimethyltryptophan silane.

[0072] Preferably, the making of the cover includes the following steps:

[0073] Step 1, the preparation of permalloy plate;

[0074] 1) Determination of Ni content

[0075] Abandon the traditional medium-nickel alloy and high-nickel alloy, adopt a low-nickel alloy with a Ni content of 40%, and add Mo and Si elements with a mass fraction of 0.5% and 1% respectively. The role of Mo is mainly to increase the resistance of the material rate, the role of Si element is mainly to increase the magnetic saturation;

[0076] 2) rolling

[0077] Mix Ni and Fe in the molten state according to the ratio of 2:3, and add Mo and Si elements with mass fractions of 0.5% and 1% respectively, and obtain permalloy plates through smelting and melting method and rolling;

[0078] 3) heat treatment

[0079] Heat treatment is divided into annealing, quenching and tempering, and final cooling stage; annealing stage: Permalloy is annealed at 1000-1300 °C for 5 hours in a protective helium atmosphere; quenching and tempering stage: reasonable and effective water-cooling equipment can make the alloy be strongly cooled, Then tempering at a high temperature of 600°C can improve the shielding performance of the permalloy plate and improve its shielding effectiveness; the final cooling stage: naturally cool down in a protective helium atmosphere, and obtain the permalloy plate after cooling;

[0080] Step 2, the treatment of the surface hydrophobic structure of the permalloy plate;

[0081] 1) Put the permalloy plate into acetone, ethanol, and deionized water for 30 minutes, and then dry it with nitrogen;

[0082] 2) Prepare 26.5% hydrochloric acid solution first, then put it into HF (38w%) solution, stir evenly, put Permalloy into the solution, treat it in a constant temperature water bath at 75°C for 10 hours, take it out, then rinse it with a large amount of water and put it into a drying box Dry to obtain the nanosheet structure on the permalloy surface;

[0083] 3) Soak the hydrochloric acid-treated permalloy in sodium laurate modification solution (29 mg/mL), and keep it in a drying oven at 90°C for 3.5 hours to complete the low surface energy modification of the permalloy surface;

[0084] Step 3, preparation of foamed aluminum-copper-nickel alloy;

[0085] 1) Heat metal aluminum, copper and nickel to molten state respectively, and form a metal mixture according to the ratio of 1:1:2;

[0086] 2) Add calcium metal to the mixed metal liquid for stirring, and adjust the viscosity of the metal in the molten state to increase the viscosity of the melt. This step is very important for the formation of metal foam. Only when the viscosity is appropriate, the bubbles will not disappear. as to escape;

[0087] 3) When the viscosity is suitable for foaming, ZrH 2 Bubble into molten metal as a foaming agent, mix the foaming agent and molten metal fully and evenly by stirring, and release H in the heated viscous molten metal 2 , the molten metal expands, and foamed aluminum-copper-nickel alloy is obtained after cooling;

[0088] Step 4, preparation of the electromagnetic shielding cover;

[0089] 1) Cutting the foamed aluminum-copper-nickel alloy into a plate material;

[0090] 2) Apply adhesive on both sides of the foamed aluminum-copper-nickel alloy, and bond the permalloy plate with it to complete the manufacture of the broadband electromagnetic shielding cover.

[0091] Test Data

[0092] First test the hydrophobic performance of the cover. When the Permalloy plate is treated in the modification solution for 3.5 hours, its contact angle is 164 degrees, and the rolling angle is less than 5 degrees; the aluminum, copper, and When the mass ratio of nickel is 1:1:2, the electromagnetic shielding test of the cover shows that its electromagnetic shielding effectiveness is as high as 96dB.

[0093] The test results show that the cover has a good super-hydrophobic effect, can play the role of self-cleaning, anti-fog and anti-freezing, and can protect and clean the high-voltage power distribution cabinet;

[0094] In terms of electromagnetic shielding, the electromagnetic shielding efficiency is as high as 96dB, which can protect the electronic components inside the high-voltage power distribution cabinet from the interference of external electromagnetic waves, and at the same time, its own electromagnetic wave shielding also reduces electromagnetic pollution of the environment.

Example Embodiment

[0095] Example 3

[0096] A high-voltage power distribution cabinet with good shielding performance, the surface of the high-voltage power distribution cabinet (10) is pasted with an electromagnetic shielding cover (20), and the cover (20) is made of permalloy plate (01) and The foamed aluminum-copper-nickel alloy (02) realizes the electromagnetic shielding function, and at the same time, the surface of the cover (20) is treated with hydrochloric acid to form a super-hydrophobic structure of nanosheets, which plays a role of self-cleaning and anti-corrosion protection.

[0097]The cover body is a sandwich structure, specifically two layers of permalloy plates (01) sandwiching a layer of foamed aluminum-copper-nickel alloy (02); the thickness of the permalloy plate (01) is 0.5mm, the The surface of the permalloy plate (01) is covered by a nanosheet structure; the ratio of Ni and Fe in the permalloy plate (01) is 2:3, and the mass fractions of 0.5% and 1% of Mo and Si elements are added The thickness of the foamed aluminum-copper-nickel alloy (02) is 3mm, and the content of nickel in the foamed aluminum-copper-nickel alloy (02) is about 5% to 40%; the nanosheet structure is the permalloy Plate (01) was modified by hydrochloric acid and low surface energy heptadecafluorodecyl trimethyltryptophan silane.

[0098] Preferably, the making of the cover includes the following steps:

[0099] Step 1, the preparation of permalloy plate;

[0100] 1) Determination of Ni content

[0101] Abandon the traditional medium-nickel alloy and high-nickel alloy, adopt a low-nickel alloy with a Ni content of 40%, and add Mo and Si elements with a mass fraction of 0.5% and 1% respectively. The role of Mo is mainly to increase the resistance of the material rate, the role of Si element is mainly to increase the magnetic saturation;

[0102] 2) rolling

[0103] Mix Ni and Fe in the molten state according to the ratio of 2:3, and add Mo and Si elements with mass fractions of 0.5% and 1% respectively, and obtain permalloy plates through smelting and melting method and rolling;

[0104] 3) heat treatment

[0105] Heat treatment is divided into annealing, quenching and tempering, and final cooling stage; annealing stage: Permalloy is annealed at 1000-1300 °C for 5 hours in a protective helium atmosphere; quenching and tempering stage: reasonable and effective water-cooling equipment can make the alloy be strongly cooled, Then tempering at a high temperature of 600°C can improve the shielding performance of the permalloy plate and improve its shielding effectiveness; the final cooling stage: naturally cool down in a protective helium atmosphere, and obtain the permalloy plate after cooling;

[0106] Step 2, the treatment of the surface hydrophobic structure of the permalloy plate;

[0107] 1) Put the permalloy plate into acetone, ethanol, and deionized water for 30 minutes, and then dry it with nitrogen;

[0108] 2) Prepare 26.5% hydrochloric acid solution first, then put it into HF (38w%) solution, stir evenly, put Permalloy into the solution, treat it in a constant temperature water bath at 75°C for 10 hours, take it out, then rinse it with a large amount of water and put it into a drying box Dry to obtain the nanosheet structure on the permalloy surface;

[0109] 3) Soak the permalloy treated with hydrochloric acid in the sodium laurate modification solution (29mg/mL), and keep it in a drying oven at 90°C for 2.5h to complete the low surface energy modification of the permalloy surface;

[0110] Step 3, preparation of foamed aluminum-copper-nickel alloy;

[0111] 1) Heat metal aluminum, copper and nickel to molten state respectively, and form a metal mixture according to the ratio of 2:1:2;

[0112] 2) Add calcium metal to the mixed metal liquid for stirring, and adjust the viscosity of the metal in the molten state to increase the viscosity of the melt. This step is very important for the formation of metal foam. Only when the viscosity is appropriate, the bubbles will not disappear. as to escape;

[0113] 3) When the viscosity is suitable for foaming, ZrH 2 Bubble into molten metal as a foaming agent, mix the foaming agent and molten metal fully and evenly by stirring, and release H in the heated viscous molten metal 2 , the molten metal expands, and foamed aluminum-copper-nickel alloy is obtained after cooling;

[0114] Step 4, preparation of the electromagnetic shielding cover;

[0115] 1) Cutting the foamed aluminum-copper-nickel alloy into a plate material;

[0116] 2) Apply adhesive on both sides of the foamed aluminum-copper-nickel alloy, and bond the permalloy plate with it to complete the manufacture of the broadband electromagnetic shielding cover.

[0117] Test Data

[0118] First test the hydrophobic performance of the cover. When the permalloy plate is treated in the modification solution for 2.5 hours, its contact angle is 162 degrees, and the rolling angle is less than 5 degrees; the aluminum, copper, and When the mass ratio of nickel is 2:1:2, the electromagnetic shielding test of the cover shows that its electromagnetic shielding effectiveness is as high as 94dB.

[0119] The test results show that the cover has a good super-hydrophobic effect, can play the role of self-cleaning, anti-fog and anti-freezing, and can protect and clean the high-voltage power distribution cabinet; in terms of electromagnetic shielding, the electromagnetic shielding efficiency is as high as 94dB, which can Protect the electronic components inside the high-voltage power distribution cabinet from the interference of external electromagnetic waves, and at the same time, its shielding of its own electromagnetic waves also reduces the electromagnetic pollution of the environment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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PUM

Property	Measurement	Unit
Thickness	0.5	mm
Thickness	3.0	mm
Electromagnetic shielding effectiveness	98.0	db
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

High permeability
Good shielding effect

High voltage power distribution cabinet with good shielding performance

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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