CN205335446U - Earthing device of oil and gas pipeline shut -off valve room - Google Patents
Earthing device of oil and gas pipeline shut -off valve room Download PDFInfo
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- CN205335446U CN205335446U CN201620106775.1U CN201620106775U CN205335446U CN 205335446 U CN205335446 U CN 205335446U CN 201620106775 U CN201620106775 U CN 201620106775U CN 205335446 U CN205335446 U CN 205335446U
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- retardant cable
- decoupling device
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- state decoupling
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Abstract
The utility model discloses an earthing device of oil and gas pipeline shut -off valve room belongs to oil and gas pipeline grounding technology field. The device is including explosion -proof junction box, explosion -proof sealing joint, intelligent solid -state decoupling device, copper bar, hot dip galvanized steel pipe, fire -retardant cable and installing support, explosion -proof junction box installs on the installing support, solid -state decoupling device of intelligence and copper bar are all installed in explosion -proof junction box, the one end of the solid -state decoupling device of intelligence is connected to the copper bar, and the other end of intelligent solid -state decoupling device is connected to outdoor ground net through fire -retardant cable, the power source of the solid -state decoupling device of intelligence is connected to DC power supply through fire -retardant cable, the communication interface of the solid -state decoupling device of intelligence is connected to the RTU rack through fire -retardant cable, be provided with a plurality of bolt holes on the copper bar, the bolt hole is connected to the earthing terminal through fire -retardant cable. The utility model discloses an earthing device has improved oil transportation gas pipeline valve room ground system's security, reliability and stability effectively.
Description
Technical field
This utility model relates to oil and gas pipeline grounding technology field, blocks the grounding device of valve chamber particularly to a kind of oil and gas pipeline。
Background technology
Oil/gas pipe Dow Jones index is mainly for delivery of the pipeline of natural gas or oil product, and it is the transport channel connecting the place of production with area of consumption, mainly includes oil/gas pipe section, yard, main line block valve chamber etc.。Wherein blocking valve chamber is the middle block valve arranged at a certain distance along the line at pipeline, in order to turn off when having an accident or overhaul。
Current oil and gas pipeline blocks the grounding of valve chamber and mainly adopts following two scheme:
1) oil and gas pipeline turnover valve chamber place is respectively provided with pipe-line wrapping flange plate, and the ground connection of the miscellaneous equipments such as valve chamber interior oil and gas pipes, electrodynamic valve, control chamber on the ground will be directly accessed the earthed system of valve chamber。The advantage of the program be earthed system install, easy to maintenance, prevent the cathodic protection current on pipeline to run off simultaneously。The shortcoming of the program is that oil and gas pipes insulating flange sheet construction costs is high, and oil and gas pipes insulating flange sheet is subjected to the faradic impact produced on pipeline by high-voltage electric power circuit fault or thunderbolt, easily cause the damage of oil and gas pipeline insulating flange sheet and aging, endanger oil and gas pipeline safe operation。
2) oil and gas pipeline turnover valve chamber place is all not provided with pipe-line wrapping flange plate; the ground connection of the miscellaneous equipments such as valve chamber interior oil and gas pipes, electrodynamic valve, control chamber on the ground will can not be introduced directly into the earthed system of valve chamber, will result in the loss of oil and gas pipeline cathodic protection current if accessed。For ensureing valve chamber equipment safety operation, it is necessary to add felt pad between the valve body and electric operator of electrodynamic valve, before the pressure guiding pipe Access Control case of pipeline, add insulating joint, electrodynamic valve and control chamber could be accessed earthed system。The advantage of the program is that construction cost is low, prevents the loss of cathodic protection current simultaneously。The shortcoming of the program be operation maintenance workload greatly, costly, and insulating joint and felt pad two ends, pressure guiding pipe and close on and there is high low potential difference between pipeline or structure equipment, if safe distance or dielectric level are likely to occur spark discharge, serious harm oil and gas pipeline safe operation time below standard。
Utility model content
In order to solve, existing oil and gas pipeline blocks the safety of valve chamber earthed system existence, reliability and stability are poor and operation maintenance workload is big, high in cost of production problem, this utility model provides a kind of oil and gas pipeline and blocks the grounding device of valve chamber, and this grounding device includes explosion-proof wiring box, EX PACKING GLAND, intelligent solid-state decoupling device, copper bar, hot galvanized steel pipe, flame-retardant cable and mounting bracket；Described explosion-proof wiring box is installed in described mounting bracket；Described intelligent solid-state decoupling device and copper bar are mounted in described explosion-proof wiring box；Described EX PACKING GLAND is arranged on described explosion-proof wiring box；One end of described intelligent solid-state decoupling device is connected to described copper bar, and the other end of described intelligent solid-state decoupling device is connected to outdoor grounded screen by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe；The power interface of described intelligent solid-state decoupling device is connected to DC source by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe；The communication interface of described intelligent solid-state decoupling device is connected to RTU rack by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe；Being provided with multiple bolt hole on described copper bar, described bolt hole is connected to earth terminal by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe。
Described flame-retardant cable includes flame retardant cable or/and fire-retardant flexible circuit conductor。
The oil and gas pipeline that this utility model provides blocks the grounding device of valve chamber; it is effectively improved the safety of oil and gas pipeline valve chamber earthed system, reliability and stability; prevent the loss of cathodic protection current; ensure the safe operation of oil and gas pipeline valve chamber earthed system; reducing the operation expense of oil and gas pipes valve chamber, the earthed system for long-distance oil & gas pipeline engineering has wide application space and good economic benefit。
Accompanying drawing explanation
Fig. 1 is the structural representation that the oil and gas pipeline of this utility model embodiment blocks the grounding device of valve chamber。
Detailed description of the invention
Below in conjunction with drawings and Examples, technical solutions of the utility model are further described。
Referring to Fig. 1, this utility model embodiment provides a kind of oil and gas pipeline and blocks the grounding device of valve chamber, and this device includes explosion-proof wiring box 1, several EX PACKING GLANDs, intelligent solid-state decoupling device 3, copper bar 4, some hot galvanized steel pipes, some fire-retardant flexible circuit conductors, some flame retardant cables and mounting bracket 8。Wherein, intelligent solid-state decoupling device 3 is installed in explosion-proof wiring box 1；Several EX PACKING GLANDs are arranged on explosion-proof wiring box 1；One end of flame retardant cable 7 is connected to one end of intelligent solid-state decoupling device 3 after hot galvanized steel pipe 5 and EX PACKING GLAND 2, and the other end of intelligent solid-state decoupling device 3 is bolted to copper bar 4 by brazing；The other end of flame retardant cable 7 is connected to outdoor grounded screen；One end of flame retardant cable 9 is connected to the power interface 10 of intelligent solid-state decoupling device 3 after hot galvanized steel pipe 11 and EX PACKING GLAND 12, and the other end of flame retardant cable 9 is connected to DC source (DC24V)；One end of flame retardant cable 14 is connected to the communication interface 13 of intelligent solid-state decoupling device 3 after hot galvanized steel pipe 15 and EX PACKING GLAND 16, and the other end of flame retardant cable 14 is connected to RTU rack；Copper bar 4 is installed in explosion-proof wiring box 1, and copper bar 4 is provided with multiple bolt hole 17；One end of fire-retardant flexible circuit conductor 6 is connected to bolt hole 17 after hot galvanized steel pipe 20 and EX PACKING GLAND 19, and the other end of fire-retardant flexible circuit conductor 6 is connected to earth terminal；One end of flame retardant cable 18 is connected to bolt hole 17 after hot galvanized steel pipe 20 and EX PACKING GLAND 19, and the other end of flame retardant cable 18 is connected to earth terminal；Explosion-proof wiring box 1 is fixed in mounting bracket 8, and one end of mounting bracket 8 is fixed on the ground by concrete foundation 21, and the other end of mounting bracket 8 fixes explosion-proof wiring box 1 by bolt 22。
In concrete production practices, intelligent solid-state decoupling device 3 has the function of isolated DC electric coupling alternating current, the running voltage of intelligent solid-state decoupling device 3 is DC24V, specified blocking voltage value is-2V/+2V or-3V/+1V, specified metastability exchange value is 45A, lightning impulse current is 100KA, and operating temperature is-40 degrees Celsius to 80 degrees Celsius。One end of intelligent solid-state decoupling device 3 can adopt the brazing of M8 to be bolted on copper bar, and the specification of copper bar is 5 × 50mm2。The other end of intelligent solid-state decoupling device 3 adopts bolt, nut, pad to connect flame retardant cable 7, and (model is ZA-YJV-1 × 25mm2), flame retardant cable 7 is connected in outdoor grounded screen through EX PACKING GLAND 2 and hot galvanized steel pipe 5。The specification of EX PACKING GLAND 2 is NPT1 ', and material is 304 rustless steels, and the specification of hot galvanized steel pipe 5 is DN25。The power interface 10 of intelligent solid-state decoupling device 3 connects flame retardant cable 9, and (model is ZA-YJV-3 × 4mm2), flame retardant cable 9 is connected to DC24V through EX PACKING GLAND 12 and hot galvanized steel pipe 11。The specification of EX PACKING GLAND 12 is NPT1 ', and material is 304 rustless steels, and the specification of hot galvanized steel pipe 11 is DN25。The communication interface 13 of intelligent solid-state decoupling device 3 connects flame retardant cable 14, and (model is ZA-DJYJPV-2 × 2 × 1.5mm2), flame retardant cable 14 is connected to RTU rack through EX PACKING GLAND 16 and hot galvanized steel pipe 15。The specification of EX PACKING GLAND 16 is NPT3/4 ', and material is 304 rustless steels, and the specification of hot galvanized steel pipe 15 is DN20。Arranging multiple bolt hole 17 on copper bar 4, the specification of bolt hole 17 is M8, and the spacing of bolt hole center is 100mm。One end of fire-retardant flexible circuit conductor 6 or flame retardant cable 18 is adopted and is bolted on copper bar 4, and the other end is connected to earth terminal through EX PACKING GLAND 19 and hot galvanized steel pipe 20。The specification of fire-retardant flexible circuit conductor 6 or flame retardant cable 18 is not less than 16mm2, the specification of EX PACKING GLAND 19 is NPT3/4 ', and material is 304 rustless steels, and the specification of hot galvanized steel pipe 20 is DN20。Explosion-proof wiring box 1 is fixed in mounting bracket 8, and explosion-proof wiring box 1 adopts ZL102 aluminium alloy manufacture, and explosive-proof grade is EXD II BT4, and degree of protection is IP65。One end of mounting bracket 8 is fixed on the ground by concrete foundation 21, and the other end fixes explosion-proof wiring box 1 by bolt 22。Bolt 22 material is rustless steel, and the specification of bolt 22 is M12。Mounting bracket 8 adopts galvanizing angle steel 11 to make, and the specification of galvanizing angle steel 11 is L63 × 5, and the thickness of zinc coat is more than 70 μm, and the explosion-proof wiring box 1 setting height(from bottom) apart from ground is 500mm。
It should be understood that in actual applications, fire-retardant flexible circuit conductor and flame retardant cable should be chosen according to the distinct device connected。Above embodiments have used fire-retardant flexible circuit conductor and flame retardant cable。Application scenario for other can only use fire-retardant flexible circuit conductor or flame retardant cable。
After the grounding device of this utility model embodiment is applied to the earthed system of oil and gas pipes yard, it may be achieved following advantage:
1) this utility model embodiment oil and gas pipeline is used to block the grounding device of valve chamber, can cancel oil and gas pipeline turnover valve chamber place be respectively provided with pipe-line wrapping flange plate, electrodynamic valve valve body and electric operator between felt pad and pipeline pressure guiding pipe Access Control case before insulating joint, thus significantly reducing the cost of pipe-line construction and operation。
2) the electric valve body ground terminal that block valve is indoor, the earth terminal of the miscellaneous equipments such as switch board earth terminal and pressure guiding pipe all accesses this utility model embodiment oil and gas pipeline and blocks the grounding device of valve chamber, the all devices blocking valve chamber is so made to form an Equipotential network, potential difference it is absent between distinct device, avoid insulating joint and felt pad two ends, pressure guiding pipe and close between pipeline or structure equipment exist high potential difference, efficiently avoid between distinct device due to safe distance or dielectric level below standard time the spark discharge that is likely to occur, improve oil and gas pipeline and block the safety of valve chamber earthed system, reliability and stability, ensure that oil and gas pipeline runs with security and stability。
3) grounding device of this utility model embodiment only introduces outdoor grounded screen by intelligent solid-state decoupling device。Intelligent solid-state decoupling device has the function of isolated DC electric coupling alternating current, cathodic protection current (cathodic protection potential is-1.5V) can be stoped to exceed voltage threshold set in advance, it is prevented that the loss of cathodic protection current；If the voltage of cathodic protection current exceedes this voltage threshold, then the grounding device of this utility model embodiment can automatically switch to short-circuit mode, it is achieved overvoltage protection；After overvoltage protection terminates, the grounding device of this utility model embodiment can automatically switch back into the pattern of original isolated DC electricity。
4) the intelligent solid-state decoupling device of this utility model embodiment has real-time communication, fault alarm and earial drainage statistical function。This function make valve chamber remote measuring and controlling system can the Grounding of monitor in real time valve chamber, find the fault of valve chamber earthed system in time, significantly reduce difficulty and the cost of conduit running and maintenance；Statistics valve chamber earial drainage data simultaneously, for the valve chamber that fault earial drainage number of times is high, strengthen monitoring and malfunction elimination, it is ensured that the safe operation of valve chamber。
In transfering natural gas from the west to the east three line pipeline engineering; by using the grounding device of this utility model embodiment; solve the defect that existing valve chamber earthed system exists; it is effectively improved the safety of oil and gas pipeline valve chamber earthed system, reliability and stability; prevent the loss of cathodic protection current; ensure the safe operation of oil and gas pipeline valve chamber earthed system; reducing the operation expense of oil and gas pipes valve chamber, the earthed system for long-distance oil & gas pipeline engineering has wide application space and good economic benefit。
Particular embodiments described above; the purpose of this utility model, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only specific embodiment of the utility model; it is not limited to this utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model。
Claims (2)
1. an oil and gas pipeline blocks the grounding device of valve chamber, it is characterised in that include explosion-proof wiring box, EX PACKING GLAND, intelligent solid-state decoupling device, copper bar, hot galvanized steel pipe, flame-retardant cable and mounting bracket；Described explosion-proof wiring box is installed in described mounting bracket；Described intelligent solid-state decoupling device and copper bar are mounted in described explosion-proof wiring box；Described EX PACKING GLAND is arranged on described explosion-proof wiring box；One end of described intelligent solid-state decoupling device is connected to described copper bar, and the other end of described intelligent solid-state decoupling device is connected to outdoor grounded screen by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe；The power interface of described intelligent solid-state decoupling device is connected to DC source by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe；The communication interface of described intelligent solid-state decoupling device is connected to RTU rack by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe；Being provided with multiple bolt hole on described copper bar, described bolt hole is connected to earth terminal by described flame-retardant cable through described EX PACKING GLAND and described hot galvanized steel pipe。
2. oil and gas pipeline as claimed in claim 1 blocks the grounding device of valve chamber, it is characterised in that described flame-retardant cable includes flame retardant cable or/and fire-retardant flexible circuit conductor。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106775.1U CN205335446U (en) | 2016-02-02 | 2016-02-02 | Earthing device of oil and gas pipeline shut -off valve room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106775.1U CN205335446U (en) | 2016-02-02 | 2016-02-02 | Earthing device of oil and gas pipeline shut -off valve room |
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| Publication Number | Publication Date |
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| CN205335446U true CN205335446U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620106775.1U Active CN205335446U (en) | 2016-02-02 | 2016-02-02 | Earthing device of oil and gas pipeline shut -off valve room |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219435A (en) * | 2017-07-14 | 2017-09-29 | 青岛哈工程船舶科技有限公司 | Oil pipeline electrostatic grounding state monitoring apparatus |
-
2016
- 2016-02-02 CN CN201620106775.1U patent/CN205335446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219435A (en) * | 2017-07-14 | 2017-09-29 | 青岛哈工程船舶科技有限公司 | Oil pipeline electrostatic grounding state monitoring apparatus |
| CN107219435B (en) * | 2017-07-14 | 2023-07-14 | 青岛哈工程船舶科技有限公司 | Oil pipeline static grounding state monitoring device |
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