CN202405774U - Stray current drainage device - Google Patents
Stray current drainage device Download PDFInfo
- Publication number
- CN202405774U CN202405774U CN2012200124689U CN201220012468U CN202405774U CN 202405774 U CN202405774 U CN 202405774U CN 2012200124689 U CN2012200124689 U CN 2012200124689U CN 201220012468 U CN201220012468 U CN 201220012468U CN 202405774 U CN202405774 U CN 202405774U
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- Prior art keywords
- current
- circuit
- current drainage
- stray
- drainage
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Abstract
The utility model discloses a stray current drainage device. The drainage device comprises a protection circuit and a drainage circuit which are connected in parallel. The protection circuit comprises a branch a and a branch b which are connected in parallel; the branch a comprises two serially-connected silicon diodes; the branch b comprises a silicon diode; the drainage circuit comprises a large-current access and a lightning access which are connected in parallel; the large-current access comprises a pressure-sensitive resistor and an inductor which are connected in series; the lighting access comprises a spark gap; and the large-current access is connected with the drainage circuit and then is connected with a grounding electrode through a lead wire. Compared with the prior art, the stray current drainage device provided by the utility model has the beneficial effects as follows: (1) the protection circuit controls potentials of metal facilities within an effective protection range of a cathode, so as to remove harmful alternating-current and direct-current stray current, limit protection current of the cathode, be beneficial to leakage of alternating-current negative half-circle current, and provide protection for a metal building; and (2) time control is carried out by using the spark gap, the inductor, the resistor and the like, so that the large-current impact, such as lightening and the like, can be eliminated in time.
Description
Technical field
The utility model relates to a kind of stray current drainage device, is specifically related to a kind of electric drainager that is applied to the buried metal structures, is used to eliminate the corrosion of stray electrical current to the metal structures.
Background technology
In the operation of buried metal structures such as pipeline; Because the influence of near high voltage power transmission and transforming circuit, electric railway, urban track traffic, electrified equipment groundbed, launching tower, thunder and lightning etc.; On metallic facility, produce and flow directly into dc stray current, or induction produces alternative stray current, thereby buried metal structures etc. are caused electrochemical corrosion; Cause the corrosion failure of metallic facility, jeopardize operation security.
Present drain means majority only has simple function, and specific aim is got rid of the electric current that structures are exerted an influence, and the problem one of existence is to be prone to cause cathodic protection current to run off; The 2nd, the AC and DC stray electrical current can not be got rid of simultaneously; The 3rd, big electric current afterflow is long etc.; Thereby the stray electrical current that causes influencing metallic facility can not in time or fully be got rid of, and it is formed potential hazard.
The utility model content
The purpose of the utility model provides a kind of stray current drainage device, and this electric drainager can carry out in time, get rid of fully deleterious current under the prerequisite of keeping metal structures protection potential.
A kind of stray current drainage device that the utility model provides comprises parallelly connected protective circuit and current drainage circuit; Said protective circuit comprises the branch road a and the branch road b of parallel connection, and said branch road a comprises the silicon diode of 2 series connection, and said branch road b comprises a silicon diode; Said current drainage circuit comprises the big current path and the thunder and lightning path of parallel connection; Said big current path comprises the piezo-resistance and the inductor of series connection; Said thunder and lightning path comprises spark gap; Be connected with earth electrode through lead after said protective circuit and the parallel connection of current drainage circuit.
In the above-mentioned stray current drainage device, said protective circuit and current drainage circuit can be located in the casing, like the waterproof casing, to prevent the erosion of external environment to said protective circuit and current drainage circuit.
In the above-mentioned stray current drainage device, the protective circuit of said parallel connection also can be connected with lead a with the current drainage circuit, and the other end of said lead a is free on outside the said casing; When using this electric drainager, the free-end of said lead a is connected with the buried metal structures that influenced by stray electrical current to be monitored.
In the above-mentioned stray current drainage device, said earth electrode is made up of at least one aluminium base sacrificial anode, zinc-base sacrificial anode or magnesium base sacrificial anode.
Compared with prior art, the utlity model has following beneficial effect:
(1) protective circuit in the cathodic protection effective range, is got rid of harmful alternating current-direct current stray electrical current with the control of Electric potentials of metallic facility, and the leakage of restriction cathodic protection current, useful interchange negative half-cycle current is for the metal structures provide protection.
(2) adopt spark gap, inductor, resistance etc. to carry out time control, in time get rid of heavy current impacts such as thunder and lightning.
Description of drawings
The structural representation of the stray current drainage device that Fig. 1 provides for the utility model.
Each mark is following among the figure: 1 protective circuit, 2 big circuit pathways, 3 thunder and lightning paths, 4 casings, 5 lead a, 6 buried metal structures, 7 magnesium base sacrificial anodes.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further, but the utility model is not limited to following examples.
The monitoring of stray current appearance that the utility model provides comprises the protective circuit 1 and current drainage circuit of parallel connection; Protective circuit 1 comprises the branch road a (not shown) and the branch road b (not shown) of parallel connection, and wherein, branch road a comprises the silicon diode of 2 series connection, and branch road b comprises 1 silicon diode; The current drainage circuit comprises the big current path 2 and thunder and lightning path 3 of parallel connection, and wherein, big current path 2 comprises the piezo-resistance (not shown) and the inductor (not shown) of series connection, and thunder and lightning path 3 comprises the spark gap (not shown); The protective circuit 1 and the current drainage circuit of parallel connection are located in the casing 4, to prevent the erosion of external environment; Protective circuit 1 and an end of current drainage circuit of parallel connection are connected with lead a5, the other end of lead a5 be used for being connected with buried metal structures 6 to be protected; The other end of protective circuit 1 and the current drainage circuit of parallel connection be located at casing 4 magnesium base sacrificial anodes 7 outward and be connected; Protective circuit 1, current drainage circuit and the magnesium base sacrificial anode 7 formation loops of buried metal structures 6 then to be protected, parallel connection can discharge the stray electrical current that produces on the buried metal structures 6 and then it is protected.
In the above-mentioned spuious circuit electric drainager, earth electrode also can be chosen as aluminium base sacrificial anode or zinc-base sacrificial anode according to actual needs.
When using above-mentioned stray current drainage device, magnesium base sacrificial anode 7 is located at subsurface a distance, the position of itself and buried metal structures 7 is relative; Lead a5 is connected with buried metal structures 6 to be protected; Then buried metal structures 6, protective circuit 1, current drainage circuit and magnesium base sacrificial anode 7 formation loops; Can carry out drainage protection to buried metal structures 6: when the big electric current of thunderbolt is arranged, through thunder and lightning path earial drainage; When exchanging current drainage, eliminate current affects through big current path.
Claims (4)
1. stray current drainage device is characterized in that: said electric drainager comprises the protective circuit and the current drainage circuit of parallel connection; Said protective circuit comprises the branch road a and the branch road b of parallel connection, and said branch road a comprises the silicon diode of 2 series connection, and said branch road b comprises a silicon diode; Said current drainage circuit comprises the big current path and the thunder and lightning path of parallel connection; Said big current path comprises the piezo-resistance and the inductor of series connection; Said thunder and lightning path comprises spark gap; Be connected with earth electrode through lead after said protective circuit and the parallel connection of current drainage circuit.
2. electric drainager according to claim 1 is characterized in that: said protective circuit and current drainage circuit are located in the casing.
3. electric drainager according to claim 2 is characterized in that: the protective circuit of said parallel connection also is connected with lead a with the current drainage circuit, and the other end of said lead a is free on outside the said casing.
4. according to arbitrary described electric drainager among the claim 1-3, it is characterized in that: said earth electrode is made up of at least one aluminium base sacrificial anode, zinc-base sacrificial anode or magnesium base sacrificial anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200124689U CN202405774U (en) | 2012-01-12 | 2012-01-12 | Stray current drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200124689U CN202405774U (en) | 2012-01-12 | 2012-01-12 | Stray current drainage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405774U true CN202405774U (en) | 2012-08-29 |
Family
ID=46703391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200124689U Expired - Fee Related CN202405774U (en) | 2012-01-12 | 2012-01-12 | Stray current drainage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405774U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066626A (en) * | 2018-08-28 | 2018-12-21 | 成都中航信虹科技股份有限公司 | The drainage method and stream discharging system of pipeline |
| CN110581375A (en) * | 2019-10-18 | 2019-12-17 | 成都中航信虹科技股份有限公司 | Direct current interference current drainage device and system |
| CN116065156A (en) * | 2022-12-29 | 2023-05-05 | 北京安科管道工程科技有限公司 | Low-threshold potential polarity drainer |
-
2012
- 2012-01-12 CN CN2012200124689U patent/CN202405774U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066626A (en) * | 2018-08-28 | 2018-12-21 | 成都中航信虹科技股份有限公司 | The drainage method and stream discharging system of pipeline |
| CN109066626B (en) * | 2018-08-28 | 2019-04-30 | 成都中航信虹科技股份有限公司 | The drainage method and stream discharging system of pipeline |
| CN110581375A (en) * | 2019-10-18 | 2019-12-17 | 成都中航信虹科技股份有限公司 | Direct current interference current drainage device and system |
| CN116065156A (en) * | 2022-12-29 | 2023-05-05 | 北京安科管道工程科技有限公司 | Low-threshold potential polarity drainer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Energy Development Co., Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Energy Development Co., Ltd. Patentee before: China National Offshore Oil Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20200112 |