CN202004446U - Pipeline decoupling device - Google Patents
Pipeline decoupling device Download PDFInfo
- Publication number
- CN202004446U CN202004446U CN2011200329665U CN201120032966U CN202004446U CN 202004446 U CN202004446 U CN 202004446U CN 2011200329665 U CN2011200329665 U CN 2011200329665U CN 201120032966 U CN201120032966 U CN 201120032966U CN 202004446 U CN202004446 U CN 202004446U
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- China
- Prior art keywords
- circuit
- decoupling device
- pipeline
- surge protection
- pipeline decoupling
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model aims at providing a pipeline decoupling device which can satisfy the condition requirement of different equipment, is high in fault alternating current electric drainage capability, good in heat dissipation, and high in environmental adaptation. The pipeline decoupling device comprises an alternating current bypass capacitor, and is characterized by further comprising a surge protection absorbing circuit and a clamping drainage circuit. The clamping drainage circuit is in parallel connection with an alternating current bypass circuit and then in series connection with the surge protection absorbing circuit.
Description
Technical field
The utility model relates to the anti-interference protector of a kind of pipe protection, especially relates to a kind of pipeline decoupling device.
Background technology
The pipeline decoupling device is that a kind of isolated DC exchanges the protector that disturbs with coupling.It can be applicable to the interchange ground connection and the DC-isolation of electric equipment in the pipeline cathode protection system; The uncoupling of pipeline electric potential gradient pad prevents the overvoltage that supply frequency, lightning/switching surge cause; Facilities such as pipe-line wrapping joint are implemented overvoltage protection under the situation that exchanges fault current, lightning impulse and mains switch surge impact; Exchange the uncoupling between the dissimilar metal that connects, prevent the galvanic corrosion between these metal structures.China's utility model patent grant number " CN201383677 ", patent name discloses a kind of solid-state decoupling device in the patent document of " solid-state decoupling device ", constitute by solid-state switch discharge tube element and capacitor circuit, the solid-state switch discharge tube element is the opposite switching discharge tube of two-way, capacitor electrode route inductor L, resistor R and capacitor C constitute, and solid-state switch discharge tube element and capacitor circuit are connected in parallel on respectively between input and the output.Adopt the decoupling device of this structure, can solve the effect of pipeline protection uncoupling to a certain extent, but the electricity function index of product has weak point, can not satisfy the protection requirement of varying environment condition, be in particular in: 1, the overvoltage through-current capacity can not satisfy the requirement of distinct device condition; 2, the discharge capacity deficiency of fault alternating current; 3, heat radiation is not enough, and the steady-state current following operating time of state is short; 4, environmental suitability is poor.
The utility model content
The utility model aims to provide and a kind ofly can satisfy the distinct device conditional request, and fault alternating current discharge capacity is strong, good heat dissipation, the pipeline decoupling device that environmental suitability is strong.
The technical scheme that the utility model adopted is: the pipeline decoupling device; comprise the interchange shunt capacitance; it is characterized in that also comprising that surge protection absorbs circuit, clamp current drainage circuit, described clamp current drainage circuit with exchange the bypass circuit parallel connection after, connect with surge protection absorption circuit.
Described surge protection absorbs circuit and comprises transient voltage inhibitor, high frequency absorption electric capacity, radio-frequency rector, connects with radio-frequency rector after transient voltage inhibitor, the parallel connection of high frequency absorption electric capacity.
Described clamp current drainage circuit is composed in parallel by the opposite clamp semiconductor element of two-way direction.
The beneficial effect that the utility model is realized has:
1, surge protection absorbs circuit employing Transient Voltage Suppressor and high-frequency element; its response speed is fast; the overvoltage through-current capacity is big; when pipeline is subjected to lightning impulse, the interference of interchange fault current; overvoltage, overcurrent are absorbed by surge protection circuit immediately, switch to short-circuit mode through clamp current drainage circuit simultaneously, after protection finishes; automatically switch to the direct-current blocking-up pattern, can not influence pipeline impressed current cathodic protection parameter generating.
2, clamp current drainage circuit is to be formed in parallel by the opposite clamp semiconductor element of two-way direction; the standard clamping voltage generally is designed to-2V/+2V; when all interference voltages are higher than clamping voltage; decoupling device is equivalent to a two-way conduction protector; allow all electric currents to pass through, with the interference of restriction to the pipe protection current potential.So, can come protection personnel and equipment to avoid various types of electrical Interference injuries by effective equipotential and ground connection are provided because the clamping voltage at two ends is very low very safe.
Description of drawings
Accompanying drawing 1 is the structured flowchart of the utility model pipeline decoupling device;
Accompanying drawing 2 is circuit theory diagrams of the utility model pipeline decoupling device.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail
As shown in drawings, the utility model pipeline decoupling device comprise exchange shunt capacitance 1, surge protection absorbs circuit 2, clamp current drainage circuit 3, described clamp current drainage circuit 3 with exchange bypass circuit 1 parallel connection after, connect with surge protection absorption circuit 2.Described surge protection absorbs circuit 2 and comprises transient voltage inhibitor 21, high frequency absorption electric capacity 22, radio-frequency rector 23, connects with radio-frequency rector 23 in transient voltage inhibitor 21, high frequency absorption electric capacity 22 backs in parallel.Described clamp current drainage circuit 3 is composed in parallel by the opposite clamp semiconductor element 31 of two-way direction.
During actual the use; when shielded pipeline is subjected to lightning impulse, the interference of interchange fault current; overvoltage, overcurrent are absorbed by surge protection circuit 2 immediately; simultaneously switch to short-circuit mode through clamp current drainage circuit 3; after protection finishes; automatically switch to the direct-current blocking-up pattern, can not influence pipeline impressed current cathodic protection parameter generating.When all interference voltages were higher than clamping voltage, decoupling device was equivalent to a two-way conduction protector, allows all electric currents to pass through, with the interference of restriction to the pipe protection current potential.So, can come protection personnel and equipment to avoid various types of electrical Interference injuries by effective equipotential and ground connection are provided because the clamping voltage at two ends is very low very safe.
Claims (3)
1. the pipeline decoupling device comprises the interchange shunt capacitance, it is characterized in that also comprising that surge protection absorbs circuit, clamp current drainage circuit, described clamp current drainage circuit with exchange the bypass circuit parallel connection after, connect with surge protection absorption circuit.
2. pipeline decoupling device according to claim 1; it is characterized in that described surge protection absorbs circuit and comprises transient voltage inhibitor, high frequency absorption electric capacity, radio-frequency rector, connect with radio-frequency rector after transient voltage inhibitor, the parallel connection of high frequency absorption electric capacity.
3. pipeline decoupling device according to claim 1 is characterized in that described clamp current drainage circuit is composed in parallel by the opposite clamp semiconductor element of two-way direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200329665U CN202004446U (en) | 2011-01-26 | 2011-01-26 | Pipeline decoupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200329665U CN202004446U (en) | 2011-01-26 | 2011-01-26 | Pipeline decoupling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004446U true CN202004446U (en) | 2011-10-05 |
Family
ID=44707173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200329665U Expired - Fee Related CN202004446U (en) | 2011-01-26 | 2011-01-26 | Pipeline decoupling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202004446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162100A (en) * | 2015-08-06 | 2015-12-16 | 北京市燃气集团有限责任公司 | Novel alternating-current electric drainage |
-
2011
- 2011-01-26 CN CN2011200329665U patent/CN202004446U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162100A (en) * | 2015-08-06 | 2015-12-16 | 北京市燃气集团有限责任公司 | Novel alternating-current electric drainage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20111005 Termination date: 20200126 |