CN117810946A - Safety monitoring and emergency system for ship shore oil pipeline - Google Patents
Safety monitoring and emergency system for ship shore oil pipeline Download PDFInfo
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- CN117810946A CN117810946A CN202410122992.9A CN202410122992A CN117810946A CN 117810946 A CN117810946 A CN 117810946A CN 202410122992 A CN202410122992 A CN 202410122992A CN 117810946 A CN117810946 A CN 117810946A
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- side oil
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000012546 transfer Methods 0.000 claims abstract description 44
- 230000003068 static effect Effects 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 17
- 230000002265 prevention Effects 0.000 abstract 2
- 239000000126 substance Substances 0.000 description 8
- 238000004880 explosion Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 238000004200 deflagration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
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- Pipeline Systems (AREA)
Abstract
The invention relates to a ship shore oil pipeline safety monitoring and emergency system, comprising: the emergency resistor is equivalent to the resistance of the insulating flange; the flange measuring circuit is used for detecting the resistance at two ends of the insulating flange; the first electronic transfer switch is connected with the flange measuring circuit and used for switching on or switching off the emergency resistor between the tail end of the ship side oil delivery pipe and the beginning end of the shore side oil delivery pipe; when the resistance value of the insulating flange is larger than a first threshold value, the first electronic transfer switch connects the emergency resistor between the tail end of the ship side oil delivery pipe and the beginning end of the shore side oil delivery pipe. According to the ship-shore oil pipeline safety monitoring and emergency system, when the resistance at the two ends of the insulating flange is larger than the first threshold value, the first electronic transfer switch connects the emergency resistance between the tail end of the ship-side oil pipeline and the initial end of the shore-side oil pipeline, so that a new static and stray current release channel consisting of the oil tanker, the ship-side oil pipeline, the emergency resistance and the shore-side oil pipeline is formed, and the static prevention and stray current prevention channel failure is avoided.
Description
Technical Field
The invention relates to the technical field of safety monitoring of operation of oil and gas (dangerous chemicals) on a ship shore, in particular to a safety monitoring and emergency system of an oil pipeline on the ship shore.
Background
In the traditional operation mode of the connection of various chemical ships and various oil tankers, the operation of static electricity elimination and good grounding is closely related to the safety and reliability in the production process. Stray current and static electricity unsafe release caused by potential difference existing on land of a ship body when the ship is connected with the shore easily cause explosion accidents of oil tanker loading and unloading oil (gas) pipelines of dangerous chemicals, and seriously threaten production safety of the oil tanker, a dock and a harbor area. In order to avoid the above-mentioned danger, the ship-shore connection must be provided with an anti-static anti-stray current insulating flange or hose (or called non-conductive nipple) connected between the ship-side oil delivery pipe and the shore-side oil delivery pipe, so as to ensure that arc sparks and possible explosions due to the arc sparks are not generated. However, the anti-static anti-stray current insulating flange is exposed outdoors for a long time, the resistance value caused by sun and rain may fail and be unqualified, the resistance between ship sides is overlarge and even insulated, the static discharge passage is interrupted, static accumulation is caused, and the passage failure of anti-static and anti-stray current safety is caused.
Disclosure of Invention
Based on this, it is necessary to provide a ship-shore oil pipeline safety monitoring and emergency system for preventing static electricity and preventing the failure of a stray current path.
The invention provides a ship shore oil pipeline safety monitoring and emergency system, which comprises:
the emergency resistor is equivalent to the resistance of the insulating flange;
the flange measuring circuit is used for detecting the resistance at two ends of the insulating flange;
the first electronic transfer switch is connected with the flange measuring circuit and used for connecting or disconnecting the emergency resistor between the tail end of the ship side oil delivery pipe and the beginning end of the shore side oil delivery pipe;
when the resistance value of the insulating flange is larger than a first threshold value, the first electronic transfer switch connects the emergency resistor between the tail end of the ship side oil delivery pipe and the beginning end of the shore side oil delivery pipe.
In one embodiment, the first electronic transfer switch disconnects from the flange measurement circuit when the emergency resistor is connected.
In one embodiment, the safety monitoring and emergency system further comprises a first wiring terminal and a second wiring terminal, wherein the first wiring terminal is connected to the flange measuring circuit through the first electronic transfer switch and is used for being connected to the tail end of the ship side oil delivery pipe, the second wiring terminal is connected to the connection end of the emergency resistor and the flange measuring circuit and is used for being connected to the starting end of the shore side oil delivery pipe or the grounding row circuit, and the other end of the emergency resistor is connected to the first electronic transfer switch.
In one embodiment, the safety monitoring and emergency system further comprises a lightning protection device connected between the first and second terminals.
In one embodiment, the safety monitoring and emergency system further comprises a shipside measurement circuit and a second electronic transfer switch, wherein the shipside measurement circuit is used for detecting resistances of two ends of the shipside oil delivery pipe, and the second electronic transfer switch is used for shorting the shipside oil delivery pipe when the resistances of the two ends of the shipside oil delivery pipe are larger than a second threshold value.
In one embodiment, the safety monitoring and emergency system further comprises a third terminal connected to the connection end of the second electronic transfer switch and the shipside measurement circuit and used for connecting the beginning end of the shipside oil delivery pipe.
In one embodiment, the other end of the second electronic transfer switch is connected to the first terminal and the shipside measurement circuit.
In one embodiment, the safety monitoring and emergency system further comprises a shore measurement circuit and a third electronic transfer switch, wherein the shore measurement circuit is used for detecting resistances of two ends of the shore oil delivery pipe, and the third electronic transfer switch is used for shorting the shore oil delivery pipe when the resistances of the two ends of the shore oil delivery pipe are larger than a third threshold value.
In one embodiment, the safety monitoring and emergency system further includes a fourth terminal connected to the connection end of the third electronic transfer switch and the shore side measuring circuit, and used for connecting with the start end of the shore side oil delivery pipe.
In one embodiment, the other end of the third electronic transfer switch is connected to the ground line circuit and the shore side measuring circuit.
Above-mentioned ship shore oil pipeline safety monitoring and emergency system detects the resistance at insulating flange both ends through flange measuring circuit, and when the resistance at insulating flange both ends was greater than first threshold value, insulating flange had unable to provide release passageway for static and stray current, and first electronic transfer switch inserts emergency resistance between the tail end of ship side oil pipeline and the beginning of shore side oil pipeline this moment to form by the new static and the release passageway of stray current that oil ship, ship side oil pipeline, emergency resistance and shore side oil pipeline are constituteed, avoided preventing static and prevent that stray current passageway from becoming invalid, thereby ensure can not produce electric arc spark and deflagration under emergency.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, a brief description will be given below of the drawings used in the embodiments or the description of the prior art, it being obvious that the drawings in the following description are some embodiments of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a ship shore oil pipeline safety monitoring and emergency system according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of the present invention for monitoring safety and emergency system of a ship-shore oil pipeline.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present invention for the purpose of illustration only and do not represent the only embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
Unless defined otherwise, all technical and scientific terms used in the specification of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in the description of the present invention includes any and all combinations of one or more of the associated listed items.
In the traditional operation mode of the connection of various chemical ships and various oil tankers, the operation of static electricity elimination and good grounding is closely related to the safety and reliability in the production process. The ship body is connected on the land, so that stray current and static electricity are released in an unsafe way, which is caused by potential difference on the land, can easily cause the explosion accident of oil tanker, dangerous chemical loading and unloading oil (gas) pipeline, and seriously threatens the production safety of oil tanker, wharf and harbor area.
In order to avoid the danger, the ship-shore connection part must be provided with an anti-static anti-stray current insulating flange or hose (or called a non-conductive short tube), the insulating flange or hose is connected between a ship-side oil delivery pipe and a shore-side oil delivery pipe, the ship-side oil delivery pipe is an oil delivery pipe of the insulating flange opposite to the ship side, the shore-side oil delivery pipe is an oil delivery pipe of the insulating flange opposite to the shore side, and the resistance of the insulating flange or hose must satisfy: the resistance value of the Chinese standard is not less than 25KΩ and not more than 2500KΩ (the resistance value of the Chinese standard also can float up and down along with different national standards, such as not less than 1KΩ or not less than 10MΩ, but the lowest lower limit is 1KΩ, and the highest upper limit is not more than 1000MΩ) or not less than 1KΩ (for example, ISGOTT International standards for oil tanker and oil terminal safety guidelines, and the like), so that instant stray current generated due to the potential difference naturally occurring between the ship and the shore can be very small due to the safety resistance of the connection between the ship and the shore, thereby ensuring that arc sparks and explosion possibly caused by the arc sparks are not generated. However, this method still presents a hazard, such as: 1) The anti-static and anti-stray current insulating flange is exposed outdoors for a long time, the resistance value caused by sun and rain may fail and be unqualified, and finally the resistance between ship sides is overlarge and even insulated, so that the loading and unloading risks between the ship sides cannot be effectively reduced, and the effective static electricity release cannot be realized; 2) The non-conductive hose or the insulating hose for ship-shore connection can be corroded, so that the resistance is overlarge and even the insulation is realized, and the electrostatic discharge passage is interrupted; 3) The long-term use of the oil delivery arm and the oil delivery pipe at the opposite sides and the opposite ship ends can also generate corrosiveness, so that the grounding resistance is overlarge, even insulation is realized, the static electricity discharge passage is interrupted, static electricity accumulation, stray current and lightning protection grounding resistance are caused to be overlarge, and the anti-static, stray current-proof and lightning protection grounding safety passage is caused to fail.
GB13348-2009 "electrostatic safety regulations for liquid petroleum products" and JTS158-2019 "design and fire protection regulations for oil and gas chemical terminals" by the department of transportation, ISGOTT "international guidelines for oil and gas terminal safety", all require frequent inspection of the electrical continuity between ship and shore and the insulation flange between ship and shore transport pipelines. The common resistance threshold for electrical continuity is 10Ω (according to different application occasions and national standards, the resistance can also be 4Ω, 30Ω, 100deg.OMEGA, etc.), GB/T3836.26-2019 section 26 of explosive Environment: the electrostatic hazard guidelines state that: if the equipotential/ground systems are all metallic, the resistance on the continuous ground path is typically less than 10Ω. A larger resistance generally indicates that the metal path is not continuous. Typically due to loosening or corrosion of the connection.
Therefore, there is a need for a new method and technology for providing a safe discharge path for static electricity and stray current, and even lightning protection, in the case of detecting the presence of defects such as excessive resistance and even insulation in a ship-shore transfer line.
The following describes the safety monitoring and emergency system for the ship shore oil pipeline according to the present invention with reference to fig. 1 and 2.
In one embodiment, as shown in fig. 1, a system for monitoring and emergency safety of a ship shore oil pipeline comprises an emergency resistor R, a flange measurement circuit 110 and a first electronic transfer switch K1.
The resistance of the emergency resistor R is equivalent to that of the insulating flange, and the emergency resistor R is used as an alternative resistor for providing a safe discharge channel of static electricity and stray current in an emergency state.
The flange measurement circuit 110 is used for detecting the resistances of the two ends of the insulating flange 60 to determine whether the insulating flange 60 meets the requirement.
The first electronic transfer switch K1 is connected to the flange measuring circuit 110 for switching the emergency resistor R on or off between the tail end of the ship-side oil line 50 and the start end of the shore-side oil line 70. Preferably, the starting end of the side oil delivery pipe 50 has an insulating hose, and the starting end and the tail end of the side oil delivery pipe 50 are provided with special connection points (columns). Alternatively, the ship-side oil delivery pipe 50 may be a ship-side gas delivery pipe or a ship-side pipe for delivering other chemicals, and the shore-side oil delivery pipe 70 may be a shore-side gas delivery pipe or a shore-side pipe for delivering other chemicals.
When the resistance of the insulating flange 60 is greater than the first threshold, the first electronic transfer switch K1 connects the emergency resistor R between the tail end of the ship-side oil delivery pipe 50 and the beginning end of the shore-side oil delivery pipe 70. Wherein the first threshold is the maximum resistance allowed by the insulating flange 60.
Alternatively, the first electronic transfer switch K1 is disconnected from the flange measurement circuit 110 when the emergency resistor R is connected to disconnect the detection of the resistance across the insulating flange 60 by the flange measurement circuit 110.
According to the ship-shore oil pipeline safety monitoring and emergency system, the resistances of the two ends of the insulating flange 60 are detected through the flange measuring circuit 110, when the resistances of the two ends of the insulating flange 60 are larger than the first threshold value, the insulating flange 60 cannot provide a safety release channel for static electricity and stray current, at this time, the first electronic transfer switch K1 connects the emergency resistor R between the tail end of the ship-side oil pipeline 50 and the beginning end of the shore-side oil pipeline 70, so that a new release channel for static electricity and stray current, which is composed of the tanker 80, the ship-side oil pipeline 50, the emergency resistor R and the shore-side oil pipeline 70, is formed, and the failure of the anti-static and anti-stray current channels is avoided, so that arc sparks and resulting deflagrations are not generated under an emergency state.
As shown in fig. 2, in one embodiment, the system for monitoring and emergency safety of a ship-shore oil pipeline further includes a first terminal 120 and a second terminal 130, wherein the first terminal 120 is connected to the flange measuring circuit 110 through the first electronic transfer switch K1 and is used for connecting to the tail end of the ship-side oil pipeline 50. The second terminal 130 is connected to the connection end of the emergency resistor R and the flange measuring circuit 110, and is used for connecting the start end (see fig. 1) of the land-side oil pipe 70 or the ground line PE. When the flange measurement circuit 110 detects the resistances at two ends of the insulating flange, the second connection terminal 130 is connected to the start end of the shore-side oil delivery pipe 70, and when the detected resistance of the insulating flange 60 is greater than the first threshold value, the second connection terminal 130 can be connected to the ground discharge circuit PE, so as to form a discharge channel of static electricity and stray current, which is formed by the ship-side oil delivery pipe 50 and the emergency resistor R. The other end of the emergency resistor R is connected with a first electronic transfer switch K1.
In this embodiment, the safety monitoring and emergency system further comprises a lightning protection device 140, the lightning protection device 140 being connected between the first terminal 120 and the second terminal 130 to ensure that the insulating flange or the non-conductive hose is not damaged by lightning strikes.
In this embodiment, the safety monitoring and emergency system further includes a shipside measurement circuit 150 and a second electronic transfer switch K2, where the shipside measurement circuit 150 is configured to detect the resistances of two ends of the shipside oil delivery pipe 50, and the second electronic transfer switch K2 is configured to short-circuit the shipside oil delivery pipe 50 when the resistances of two ends of the shipside oil delivery pipe 50 are greater than a second threshold, so as to short-circuit when the resistance of the shipside oil delivery pipe 50 is too large, so that static electricity has a safety release channel.
Preferably, the safety monitoring and emergency system further comprises a third terminal 160, wherein the third terminal 160 is connected to the connection end of the second electronic transfer switch K2 and the shipside measurement circuit 150, and is used for connecting to the beginning end of the shipside oil delivery pipe 50, and also can be used for connecting to a terminal of the tanker 80. Alternatively, the other end of the second electronic transfer switch K2 is connected to the first terminal 120 and the shipside measurement circuit 150.
In this embodiment, the safety monitoring and emergency system further includes a shore side measuring circuit 170, a third electronic transfer switch K3, and a fourth terminal 180, where the shore side measuring circuit 170 is configured to detect the resistance at two ends of the shore side oil delivery pipe 70, and the third electronic transfer switch K3 is configured to short-circuit the shore side oil delivery pipe 70 when the resistance at two ends of the shore side oil delivery pipe 70 is greater than a third threshold, so that static electricity has a safety release channel. The fourth terminal 180 is connected to the connection end of the third electronic transfer switch K3 and the shore side measuring circuit 170, and is used for connecting the start end of the shore side oil pipe 70. The other end of the third electronic transfer switch K3 is connected to the ground plane circuit PE and the shore side measuring circuit 170.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention, which are within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
1. A ship shore oil pipeline safety monitoring and emergency system, comprising:
the emergency resistor is equivalent to the resistance of the insulating flange;
the flange measuring circuit is used for detecting the resistance at two ends of the insulating flange;
the first electronic transfer switch is connected with the flange measuring circuit and used for connecting or disconnecting the emergency resistor between the tail end of the ship side oil delivery pipe and the beginning end of the shore side oil delivery pipe;
when the resistance value of the insulating flange is larger than a first threshold value, the first electronic transfer switch connects the emergency resistor between the tail end of the ship side oil delivery pipe and the beginning end of the shore side oil delivery pipe.
2. The shore oil line safety monitoring and emergency system of claim 1, wherein said first electronic transfer switch disconnects from said flange measurement circuit when said emergency resistor is accessed.
3. The ship-shore oil pipeline safety monitoring and emergency system according to claim 1, further comprising a first wiring terminal and a second wiring terminal, wherein the first wiring terminal is connected to the flange measuring circuit through the first electronic transfer switch and is used for being connected to the tail end of the ship-side oil pipeline, the second wiring terminal is connected to the connection end of the emergency resistor and the flange measuring circuit and is used for being connected to the beginning end or the grounding drainage circuit of the ship-side oil pipeline, and the other end of the emergency resistor is connected to the first electronic transfer switch.
4. A ship shore oil pipeline safety monitoring and emergency system according to claim 3, further comprising a lightning protection device connected between said first and second terminals.
5. The ship-shore oil pipeline safety monitoring and emergency system according to claim 3, further comprising a ship-side measuring circuit for detecting resistances at both ends of the ship-side oil pipeline and a second electronic transfer switch for shorting the ship-side oil pipeline when the resistances at both ends of the ship-side oil pipeline are greater than a second threshold value, so that static electricity has a safety release channel.
6. The system of claim 5, further comprising a third terminal connected to the connection end of the second electronic transfer switch and the shipside measurement circuit and configured to connect to the beginning of the shipside pipeline.
7. The ship-shore oil pipeline safety monitoring and emergency system according to claim 6, wherein the other end of the second electronic transfer switch is connected with the first wiring terminal and the ship-side measuring circuit.
8. The ship shore oil pipeline safety monitoring and emergency system according to any one of claims 1 to 7, further comprising a shore side measuring circuit for detecting resistance across a shore side oil pipeline and a third electronic transfer switch for shorting the shore side oil pipeline when resistance across the shore side oil pipeline is greater than a third threshold, such that static electricity has a safety release path.
9. The marine shore oil pipeline safety monitoring and emergency system according to claim 8, further comprising a fourth terminal, wherein the fourth terminal is connected to a connection end of the third electronic transfer switch and the shore side measuring circuit and is used for connecting a start end of the shore side oil pipeline.
10. The ship-shore oil pipeline safety monitoring and emergency system according to claim 9, wherein the other end of the third electronic transfer switch is connected with a grounding bar circuit and a shore-side measuring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410122992.9A CN117810946A (en) | 2024-01-29 | 2024-01-29 | Safety monitoring and emergency system for ship shore oil pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410122992.9A CN117810946A (en) | 2024-01-29 | 2024-01-29 | Safety monitoring and emergency system for ship shore oil pipeline |
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| Publication Number | Publication Date |
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| CN117810946A true CN117810946A (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410122992.9A Pending CN117810946A (en) | 2024-01-29 | 2024-01-29 | Safety monitoring and emergency system for ship shore oil pipeline |
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| CN (1) | CN117810946A (en) |
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- 2024-01-29 CN CN202410122992.9A patent/CN117810946A/en active Pending
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