CN216891227U - Negative potential corrosion-resistant protection system for cable trench grounding electrode - Google Patents
Negative potential corrosion-resistant protection system for cable trench grounding electrode Download PDFInfo
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- CN216891227U CN216891227U CN202220069575.9U CN202220069575U CN216891227U CN 216891227 U CN216891227 U CN 216891227U CN 202220069575 U CN202220069575 U CN 202220069575U CN 216891227 U CN216891227 U CN 216891227U
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Abstract
The utility model relates to the technical field of corrosion prevention of electric power grounding devices, in particular to a negative potential corrosion prevention protection system for a cable trench grounding electrode. The electric potential testing well comprises a cable angle iron support, a transformer neutral point grounding electrode and a grounding flat steel belt, and is arranged below the ground, the cable angle iron support and the transformer neutral point grounding electrode form equipotential connection through the grounding flat steel belt, a copper connecting sheet is installed in the electric potential testing well, one end of the copper connecting sheet is connected with the grounding flat steel belt through a first wire, and the other end of the copper connecting sheet is connected with the sacrificial anode through a second wire. The utility model can form effective anticorrosion protection for the cable angle iron bracket and the transformer neutral point grounding electrode, thereby prolonging the service life of the cable angle iron bracket and ensuring the power supply safety.
Description
Technical Field
The utility model relates to the technical field of corrosion prevention of electric power grounding devices, in particular to a negative potential corrosion prevention protection system for a cable trench grounding electrode.
Background
The cable trench is an underground pipeline used for laying and replacing electric power or telecommunication cable facilities, is also an enclosure structure of laid cable facilities, and has the structural forms of rectangular, circular, arched and other pipeline structures. Common cable trenches in power transmission engineering include underground cable trenches, cable tunnels, direct cable burial and cable through pipes, and the cable tunnels and the direct cable burial are commonly used. Common cable trenches for power transformation engineering include cable tunnels, overground cable trenches and underground cable trenches. The cable trench is internally provided with a cable support, the cable support is usually made of metal materials and is fixed on the trench wall through welding or screws, the cable is supported by the support and keeps a certain distance from the trench bottom, and the cable trench is also usually internally provided with a power transformer neutral point grounding electrode to provide grounding protection for the power transformer.
The general many rainwater in summer of cable pit, the environment is moist abominable, and although angle steel cable support and power transformer neutral point earthing pole in the cable pit have certain cathodic corrosion protection effect, but also can consume totally very soon and take place the metal corrosion in being in the moist environment of diuresis for a long time, and the cable pit internal corrosion condition of especially chemical plant is more serious, and the maintenance cost of facility is high, and life is short. In the aspect of rust prevention, the service life of the corresponding facilities cannot be effectively prolonged for a long time although the technologies such as paint or hot galvanizing are adopted for treatment at present, so that the service life of the corresponding facilities is short.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a negative potential anticorrosion protection system for a cable trench grounding electrode, which can form effective anticorrosion protection for a cable angle iron bracket and a transformer neutral grounding electrode when being applied, so that the service life of the system is prolonged, and the power supply safety is ensured.
The technical scheme adopted by the utility model is as follows:
the utility model provides a cable pit earthing electrode negative potential anticorrosion protection system, includes cable angle iron support, transformer neutral grounding pole and ground connection flat steel band to and locate subaerial electric potential test well and sacrificial anode, cable angle iron support and transformer neutral grounding pole form the equipotential connection through ground connection flat steel band, install the copper connection piece in the electric potential test well, the one end of copper connection piece is connected with ground connection flat steel band through first wire, and the other end passes through the second wire and is connected with sacrificial anode.
Based on the technical content, the cable angle iron bracket and the transformer neutral point grounding electrode are connected through the grounding flat steel strip, the copper connecting sheet is arranged to facilitate detection of the protective current and the potential of the sacrificial anode, the grounding flat steel strip and the sacrificial anode are respectively connected to two ends of the copper connecting sheet, the potential difference between the sacrificial anode and the grounding flat steel strip is formed by utilizing the enough negative potential of the sacrificial anode, the electron transfer of the sacrificial anode is enabled to form the current, the effective negative potential protection is formed on the metal structure formed by the cable angle iron bracket, the transformer neutral point grounding electrode and the grounding steel strip through consumption of the sacrificial anode material, the cable angle iron bracket and the transformer neutral point grounding electrode are prevented from being corroded in the long-term use process, the service life of the cable angle iron bracket and the transformer neutral point grounding electrode are prolonged, and the power supply safety is ensured. And the sacrificial anode is convenient to replace, the cable angle iron bracket and the transformer neutral point grounding electrode are protected through the consumption of the sacrificial anode, and the working condition requirements of actual overhaul and maintenance are met.
In one possible design, the grounding flat steel strip is arranged along the cable trench, and a plurality of cable angle steel brackets and a transformer neutral grounding pole are connected to the grounding flat steel strip in parallel. When the cable trench grounding device is applied, the grounding flat steel belt is arranged along the cable trench, so that the cable angle iron support and the transformer neutral grounding pole along the cable trench are conveniently connected to the grounding flat steel belt for protection.
In one possible design, the grounded flat steel strip is hot galvanized flat steel, and the grounded flat steel strip is welded with the cable angle iron bracket and the transformer neutral point grounding pole. When the cable grounding structure is used, the hot-dip galvanized flat steel can play a further role in corrosion protection, and the grounding flat steel strip is welded with the cable angle iron bracket and the transformer neutral point grounding electrode, so that the stability of connection of the whole structure is ensured.
In one possible design, the first lead wire is welded with the grounding flat steel strip in an aluminum hot melting mode, and an aluminum hot melting welding point is formed at the joint of the first lead wire and the grounding flat steel strip. When the aluminum heat fusion welding device is used, the first lead and the grounding flat steel strip are subjected to aluminum heat fusion welding, so that the current intercepting amount of the formed aluminum heat fusion welding point is equal to that of the first lead, the aluminum heat fusion welding point is permanent, high resistance cannot be caused by looseness or corrosion, and the aluminum heat fusion welding point is not influenced by corrosive products.
In one possible design, the main body surfaces and the welding positions of the cable angle iron bracket, the transformer neutral point grounding pole and the grounding flat steel strip are coated with cold zinc coatings. When the anti-corrosion device is applied, the cold zinc coating layers are coated on the surfaces and the welding positions of the main body of the cable angle iron bracket, the transformer neutral point grounding pole and the grounding flat steel strip, so that the anti-corrosion performance of the cable angle iron bracket, the transformer neutral point grounding pole and the grounding flat steel strip is further improved, and the service life is prolonged.
In one possible design, the sacrificial anode is a zinc alloy anode or a magnesium alloy anode. When the anode is used, the zinc alloy anode or the magnesium alloy anode is adopted, so that the potential of the sacrificial anode is sufficiently negative, the current efficiency is sufficiently high, the anticorrosion protection of a cable angle iron bracket and a neutral point grounding electrode of a transformer is facilitated, and the generated corrosion product is non-toxic and harmless and does not pollute the environment.
In one possible embodiment, at least two sacrificial anodes are provided, and each sacrificial anode is connected in parallel to the second conductor. When the sacrificial anode is applied, the sacrificial anodes are connected onto the second conducting wire, so that sufficient consumption requirements are guaranteed in the long-term use process of the cable angle iron bracket and the transformer neutral grounding electrode, and sufficient electrons are supplied to enable the protected cable angle iron bracket, the transformer neutral grounding electrode and the grounding flat steel strip to generate cathode polarization.
In one possible design, the sacrificial anodes are buried below the ground horizontally, and the interval between two adjacent sacrificial anodes is larger than 3 m. When the sacrificial anode is applied, the sacrificial anode is horizontally buried under the ground, and the interval between two adjacent sacrificial anodes is larger than 3m, so that the negative potential effect of each sacrificial anode is fully exerted, and the potential electrode current of the sacrificial anode is more stable.
In one possible design, the soil surrounding the sacrificial anode is provided with a chemical packing material, so that the resistivity of the soil surrounding the sacrificial anode is less than or equal to 50 omega-m. When the sacrificial anode is applied, the chemical filling materials are arranged in the soil around the sacrificial anode, so that the resistivity of the soil around the sacrificial anode is less than or equal to 50 omega-m, the lower grounding resistance of the sacrificial anode can be ensured, and the current output of the sacrificial anode is kept stable.
In one possible design, the copper tab uses a portable copper sulfate reference electrode to detect the guard potential. When the copper sulfate reference electrode is used, the reference test reference potential of the copper connecting sheet can be effectively detected by adopting the copper sulfate reference electrode.
The utility model has the beneficial effects that:
according to the utility model, the cable angle iron bracket and the transformer neutral point grounding electrode are connected through the grounding flat steel strip, the copper connecting sheet is arranged to facilitate the detection of the protective current and the potential of the sacrificial anode, so that the grounding flat steel strip and the sacrificial anode are respectively connected to two ends of the copper connecting sheet, the potential difference between the sacrificial anode and the grounding flat steel strip is formed by utilizing the enough negative potential of the sacrificial anode, the electron transfer of the sacrificial anode is formed into the current, the effective negative potential protection is formed on the metal structure consisting of the cable angle iron bracket, the transformer neutral point grounding electrode and the grounding flat steel strip through the consumption of the sacrificial anode material, the cable angle iron bracket and the transformer neutral point grounding electrode are prevented from being corroded in the long-term use process, the service life of the cable angle iron bracket and the transformer neutral point grounding electrode is prolonged, and the power supply safety is ensured.
Drawings
Reference will now be made in brief to the drawings that are needed in describing embodiments or prior art.
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a cable angle bracket; 2. a neutral grounding pole of the transformer; 3. a flat ground steel strip; 4. a potential testing well; 5. a sacrificial anode; 6. a copper connecting sheet; 7. a first conductive line; 8. a second conductive line; 9. and (3) aluminum hot-melt welding spots.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the utility model. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
Example 1:
the embodiment provides a cable pit earthing electrode negative potential anticorrosion protection system, as shown in fig. 1, including cable angle iron support 1, transformer neutral grounding pole 2 and ground connection flat steel band 3 to and locate subaerial electric potential test well 4 and sacrificial anode 5, cable angle iron support 1 and transformer neutral grounding pole 2 form the equipotential through ground connection flat steel band 3 and connect, install copper connection piece 6 in the electric potential test well 4, the one end of copper connection piece 6 is connected with ground connection flat steel band 3 through first wire 7, and the other end passes through second wire 8 and is connected with sacrificial anode 5.
During specific implementation, the cable angle iron support 1 and the transformer neutral point grounding electrode 2 are connected through the grounding flat steel strip 3, the copper connecting sheet 6 is arranged to facilitate detection of protection current and potential of the sacrificial anode 5, the grounding flat steel strip 3 and the sacrificial anode 5 are respectively connected to two ends of the copper connecting sheet 6, potential difference between the sacrificial anode 5 and the grounding flat steel strip 3 is formed by utilizing enough negative potential of the sacrificial anode 5, and electrons of the sacrificial anode 5 are transferred to form current, so that effective negative potential protection is formed on a metal structure formed by the cable angle iron support 1, the transformer neutral point grounding electrode 2 and the grounding flat steel strip 3 through consumption of materials of the sacrificial anode 5, corrosion of the cable angle iron support 1 and the transformer neutral point grounding electrode 2 in a long-term use process is prevented, the service life of the cable angle iron support is prolonged, and power supply safety is guaranteed. And sacrificial anode 5 is convenient for change, protects cable angle iron bracket 1 and transformer neutral grounding pole 2 through sacrificial anode 5's consumption, more accords with the operating mode demand of actual maintenance.
Example 2:
as an optimization of the above embodiment, the flat grounding steel belt 3 is arranged along the cable trench, and a plurality of cable angle iron brackets 1 and transformer neutral grounding poles 2 are connected in parallel to the flat grounding steel belt 3. During specific implementation, the flat grounding steel belt 3 is arranged along the cable trench, so that the cable angle iron bracket 1 and the transformer neutral grounding electrode 2 along the cable trench are both connected to the flat grounding steel belt 3 for protection.
Furthermore, the flat grounding steel strip 3 is made of hot-dip galvanized flat steel, and the flat grounding steel strip 3 is welded with the cable angle iron bracket 1 and the transformer neutral point grounding pole 2. During specific implementation, the hot galvanizing flat steel is adopted to play a further role in anti-corrosion protection, and the grounding flat steel belt 3 is welded with the cable angle iron bracket 1 and the transformer neutral point grounding electrode 2 to ensure the stability of connection of the whole structure. The hot-dip galvanized flat steel is a galvanized steel material with the width of 12-300mm, the thickness of 4-60mm, the cross section of the galvanized steel material is rectangular and slightly pure edges, and 40 multiplied by 4 hot-dip galvanized flat steel can be selected.
Further, the first lead 7 and the flat grounding steel strip 3 are subjected to aluminum hot melt welding, and an aluminum hot melt welding spot 9 is formed at the joint of the first lead 7 and the flat grounding steel strip 3. In specific implementation, the first lead 7 and the flat grounding steel strip 3 are subjected to aluminothermic welding, so that the current intercepting amount of the formed aluminothermic welding point 9 is equal to that of the first lead 7, and the aluminothermic welding point 9 is permanent, high resistance cannot be caused by loosening or corrosion, and the influence of corrosive products cannot be caused.
Furthermore, the main body surfaces and the welding positions of the cable angle iron bracket 1, the transformer neutral point grounding pole 2 and the grounding flat steel strip 3 are coated with cold zinc coatings. During specific implementation, cold zinc coatings are coated on the surfaces and welding positions of the main bodies of the cable angle iron support 1, the transformer neutral point grounding pole 2 and the grounding flat steel strip 3, so that the overall corrosion resistance of the cable angle iron support 1, the transformer neutral point grounding pole 2 and the grounding flat steel strip 3 is further improved, and the service life is prolonged. The thickness of the cold galvanizing layer can be set to be more than or equal to 0.57mm, so that the zinc-coated steel is formed and the protection effect is fully achieved.
Example 3:
as an optimization of the above embodiment, the sacrificial anode 5 is a zinc alloy anode or a magnesium alloy anode. In specific implementation, the zinc alloy anode or the magnesium alloy anode is adopted, so that the potential of the sacrificial anode 5 is negative enough, the current efficiency is high enough, the corrosion protection of a cable angle iron bracket and a neutral point grounding electrode of a transformer is facilitated, and the generated corrosion product is non-toxic and harmless and does not pollute the environment.
Further, at least two sacrificial anodes 5 are provided, and each sacrificial anode 5 is connected in parallel to the second conducting wire 8. During specific implementation, a plurality of sacrificial anodes 5 are connected to the second lead 8, so that sufficient consumption requirements are ensured in the long-term use process of the cable angle iron bracket 1 and the transformer neutral point grounding pole 2, and sufficient electrons are supplied to enable the protected cable angle iron bracket 1, the transformer neutral point grounding pole 2 and the grounding flat steel strip 3 to generate cathode polarization.
Further, the sacrificial anode 5 is horizontally buried under the ground, and the interval between two adjacent sacrificial anodes 5 is greater than 3 m. In specific implementation, the sacrificial anodes 5 are horizontally buried under the ground, and the interval between two adjacent sacrificial anodes 5 is greater than 3m, so that the negative potential function of each sacrificial anode 5 is fully exerted, and the potential electrode current of the sacrificial anode 5 is more stable.
Furthermore, chemical filling materials are arranged in the soil around the sacrificial anode 5, so that the resistivity of the soil around the sacrificial anode 5 is less than or equal to 50 omega m. In specific implementation, the chemical filling materials are arranged in the soil around the sacrificial anode 5, so that the resistivity of the soil around the sacrificial anode 5 is less than or equal to 50 omega-m, the lower grounding resistance of the sacrificial anode 5 can be ensured, and the current output of the sacrificial anode is kept stable. The electric potentials of the cable angle iron bracket 1 and the transformer neutral point grounding electrode 2 can be compensated to-0.85V by making the resistivity of the soil less than or equal to 50 omega-m and adopting a 40 multiplied by 4 hot galvanizing flat steel strip, so that the zinc coating of the cable angle iron bracket 1 and the transformer neutral point grounding electrode 2 is effectively protected and prevented from being corroded.
Further, the copper connecting sheet 6 adopts a portable copper sulfate reference electrode to detect the protection potential. When the copper sulfate reference electrode is used, the reference test reference potential of the copper connecting sheet 6 can be effectively detected by adopting the copper sulfate reference electrode.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the utility model, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (10)
1. The utility model provides a cable pit earth electrode negative potential corrosion protection system which characterized in that: including cable angle iron support (1), transformer neutral grounding pole (2) and ground connection flat steel band (3) to and locate subaerial electric potential test well (4) and sacrificial anode (5), cable angle iron support (1) and transformer neutral grounding pole (2) form the equipotential through ground connection flat steel band (3) and connect, install copper connection piece (6) in electric potential test well (4), the one end of copper connection piece (6) is connected with ground connection flat steel band (3) through first wire (7), and the other end passes through second wire (8) and is connected with sacrificial anode (5).
2. The negative potential corrosion prevention protection system for the cable trench grounding electrode according to claim 1, characterized in that: the grounding flat steel belt (3) is arranged along the cable trench, and a plurality of cable angle iron brackets (1) and a transformer neutral grounding electrode (2) are connected to the grounding flat steel belt (3) in parallel.
3. The negative potential corrosion prevention protection system for the cable trench grounding electrode according to claim 1, characterized in that: the flat grounding steel strip (3) is made of hot-dip galvanized flat steel, and the flat grounding steel strip (3) is welded with the cable angle iron bracket (1) and the transformer neutral point grounding pole (2).
4. The negative potential corrosion protection system for the cable trench grounding electrode according to claim 3, wherein: the first lead (7) and the grounding flat steel strip (3) are subjected to aluminum hot melt welding, and an aluminum hot melt welding point (9) is formed at the joint of the first lead (7) and the grounding flat steel strip (3).
5. The negative potential corrosion protection system for the cable trench grounding electrode according to claim 3, wherein: and cold zinc coatings are respectively coated on the surfaces of the main bodies and the welding positions of the cable angle iron bracket (1), the transformer neutral point grounding electrode (2) and the grounding flat steel strip (3).
6. The negative potential corrosion prevention protection system for the cable trench grounding electrode according to claim 1, characterized in that: the sacrificial anode (5) adopts a zinc alloy anode or a magnesium alloy anode.
7. The negative potential corrosion prevention protection system for the cable trench grounding electrode according to claim 1, characterized in that: at least two sacrificial anodes (5) are arranged, and each sacrificial anode (5) is connected to the second lead (8) in parallel.
8. The negative potential corrosion protection system for the cable trench grounding electrode according to claim 7, wherein: the sacrificial anodes (5) are horizontally buried under the ground, and the interval between every two adjacent sacrificial anodes (5) is larger than 3 m.
9. The negative potential corrosion prevention protection system for the cable trench grounding electrode according to claim 1, characterized in that: chemical filling materials are arranged in the soil around the sacrificial anode (5), so that the resistivity of the soil around the sacrificial anode (5) is less than or equal to 50 omega-m.
10. The negative potential corrosion prevention protection system for the cable trench grounding electrode according to claim 1, characterized in that: the copper connecting sheet (6) adopts a portable copper sulfate reference electrode to detect the protection potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220069575.9U CN216891227U (en) | 2022-01-11 | 2022-01-11 | Negative potential corrosion-resistant protection system for cable trench grounding electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220069575.9U CN216891227U (en) | 2022-01-11 | 2022-01-11 | Negative potential corrosion-resistant protection system for cable trench grounding electrode |
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| CN216891227U true CN216891227U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220069575.9U Active CN216891227U (en) | 2022-01-11 | 2022-01-11 | Negative potential corrosion-resistant protection system for cable trench grounding electrode |
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| CN (1) | CN216891227U (en) |
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- 2022-01-11 CN CN202220069575.9U patent/CN216891227U/en active Active
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