CN219082819U - Resistance monitoring system of ship shore conveying pipeline - Google Patents
Resistance monitoring system of ship shore conveying pipeline Download PDFInfo
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- CN219082819U CN219082819U CN202320024553.5U CN202320024553U CN219082819U CN 219082819 U CN219082819 U CN 219082819U CN 202320024553 U CN202320024553 U CN 202320024553U CN 219082819 U CN219082819 U CN 219082819U
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Abstract
The utility model discloses a resistance monitoring system of a ship shore conveying pipeline, which comprises the following components: the monitoring circuit is used for selectively conducting at least two positions of the offshore hull, the starting end of the ship side conveying pipe, the ending end of the ship side conveying pipe, the starting end of the shore side conveying pipe and the ending end of the shore side conveying pipe through connecting terminals or special clamps respectively, and is connected with the ground bank circuit of the shore base so as to monitor the resistance between two positions of the at least two positions and the resistance between the ship sides; and the alarm indicator is in communication connection with the monitoring circuit and is connected with the monitoring circuit, and when the resistance monitored by the monitoring circuit exceeds a trigger threshold value, the alarm indicator gives an alarm.
Description
Technical Field
The utility model relates to the technical field of ship-shore connection safety monitoring, in particular to a resistance monitoring system of a ship-shore conveying pipeline.
Background
In the traditional operation mode of various chemical ships and various oil tanker unloading shore connection, static electricity elimination and good grounding are closely related to safety and reliability in operation and production procedures. The fire and explosion accidents of the tanker caused by stray current due to the potential difference of the ship body to the land in the ship-shore connection frequently happen at home and abroad, and the production safety of the tanker, the wharf and the harbor area is seriously threatened.
In order to avoid the above-mentioned danger, in the prior art, an antistatic insulating flange or an antistatic hose (a nonconductive short tube carried by the hose) must be provided between the ship-shore connections, and the resistance R must satisfy: not less than 25kΩ and not more than 2500kΩ (chinese standard), or not less than 1kΩ (international standard), so that the instantaneous stray current due to the potential difference becomes very small due to the "safe" resistance of the connection between the ship sides, thereby ensuring that arc sparks and explosions are not generated. However, this approach remains dangerous, such as: 1) The anti-static 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 the ship sides cannot effectively reduce the current value between the ship sides; 2) The oil delivery arm at the ship end is usually in soft connection, and can be corroded after long-term use, so that the resistance is overlarge, and the electrostatic discharge passage is interrupted; 3) When the oil delivery arm at the opposite bank end is used for a long time, corrosiveness can occur, so that the grounding resistance is overlarge, the static electricity discharge passage is interrupted, static electricity accumulation or overlarge lightning protection grounding resistance is caused, and the anti-static electricity and lightning protection passage is invalid; 4) The whole ship-shore connection loop does not meet the standard, is poor, has problems of electrical continuity, and can also cause sparks and the like caused by stray current caused by potential difference. 5) National standards (such as GB13348-2009 "liquid Petroleum product static safety regulations" and department of transportation JT416-2000 "liquefied gas terminal safety technical requirements") require frequent inspection of insulation flanges and electrical continuity between ship-shore conveying pipelines.
Therefore, there is a need for a new resistance monitoring system for a ship-shore transportation pipeline, which can timely detect whether the ship-shore transportation pipeline has the above-mentioned drawbacks.
Disclosure of Invention
The utility model aims to overcome the defect that the conventional ship-shore connection cannot effectively monitor the resistance of a related pipeline system and the risk caused by the grounding state in real time, and provides a resistance monitoring system of a ship-shore conveying pipeline.
The utility model solves the technical problems by adopting the following technical scheme: the utility model provides a resistance monitoring system of a ship-shore conveying pipeline, wherein the ship-shore conveying pipeline comprises a ship-side conveying pipe connected with an offshore ship body, a shore-side conveying pipe connected with an onshore storage mechanism and an insulating flange connected with the ship-side conveying pipe and the shore-side conveying pipe, and the resistance monitoring system is characterized by comprising:
the monitoring circuit is connected with the ground row circuit of the shore base to monitor the resistance between two positions of the at least two positions and the resistance between the ship sides; and
the alarm indicator is in communication connection with the monitoring circuit, the alarm indicator is connected with the monitoring circuit, the monitoring circuit is provided with a trigger threshold, and when the resistance monitored by the monitoring circuit exceeds the trigger threshold, the monitoring circuit sends an alarm signal to the alarm indicator so that the alarm indicator gives an alarm.
According to some embodiments of the utility model, the ship side transfer pipe and the shore side transfer pipe are antistatic metal hoses.
According to some embodiments of the utility model, the monitoring circuit is communicatively connected to an associated pump valve for controlling the on-off of the shore transfer line, and the monitoring circuit selectively turns on the at least two positions of the offshore hull, the starting end of the side transfer line, the ending end of the side transfer line, the starting end of the side transfer line, and the ending end of the side transfer line in accordance with a signal of the associated pump valve.
According to some embodiments of the utility model, the associated pump valve is configured to close the shore transfer line in response to the alarm signal.
According to the present utility modelSome embodiments of the utility model, the trigger threshold comprises a first trigger threshold R 1 The first trigger threshold R 1 Corresponding to the terminating end of the ship side conveying pipe and the starting end of the shore side conveying pipe, and a first trigger threshold R 1 Is 1KΩ or 25KΩ, when the resistance monitored by the monitoring circuit is smaller than the first trigger threshold R 1 And when the monitoring circuit sends an alarm signal to the alarm indicator.
According to some embodiments of the utility model, the first trigger threshold R 1 2500KΩ, when the resistance monitored by the monitoring circuit is greater than the first trigger threshold R 1 And when the monitoring circuit sends an alarm signal to the alarm indicator.
According to some embodiments of the utility model, the trigger threshold comprises a third trigger threshold R corresponding to the starting and ending ends of the side transfer pipe 3 The third trigger threshold R 3 Is 4Ω, 10Ω or 100deg.OMEGA, when the resistance monitored by the monitoring circuit is greater than the third trigger threshold R 3 And when the monitoring circuit sends an alarm signal to the alarm indicator.
According to some embodiments of the utility model, the trigger threshold includes a fourth trigger threshold R corresponding to a start end and an end of the shore side transfer pipe 4 The fourth trigger threshold R 4 And the third trigger threshold R 3 The same applies.
According to some embodiments of the utility model, the trigger threshold comprises a second trigger threshold R 2 The second trigger threshold R 2 Corresponding to the ground resistance of the ship side transfer pipe or the shore side transfer pipe, and the second trigger threshold R 2 And the third trigger threshold R 3 Equal.
According to some embodiments of the utility model, the special clip is a removable grounding clip.
According to some embodiments of the utility model, the alarm indicator is a horn or an indicator light.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the utility model.
The utility model has the positive progress effects that: the resistance monitoring system of the ship-shore conveying pipeline can conveniently monitor whether the electrical continuity of ship-shore system components such as a ship-side conveying pipe and a shore-side conveying pipe meets relevant standards, and ensures that under the condition of potential difference, whether the electrostatic discharge and stray current discharge channels of the conveying pipe are safe or not can be timely found, whether the channel resistance meets the standard requirements or not, and under the condition of not meeting the standards, the loading and unloading pump valve and the alarm can be timely cut off, so that dangerous sparks can be effectively avoided, and accident risks caused by dangerous operation are avoided.
Drawings
Fig. 1 is a schematic diagram of a ship-shore transfer line resistance monitoring system with on-line detection according to a preferred embodiment of the present utility model.
Detailed Description
The following detailed description of the preferred embodiments of the utility model, taken in conjunction with the accompanying drawings, is given by way of illustration and not limitation, and any other similar situations are intended to fall within the scope of the utility model.
As shown in fig. 1, the resistance monitoring system of the ship-shore transfer line according to the preferred embodiment of the present utility model, wherein the ship-shore transfer line comprises a ship-side transfer pipe 2, a shore-side transfer pipe 3, and an insulating flange 4. The side transfer pipe 2 is connected to an offshore hull 1 in the form of a tanker 1 or a chemical tanker, such as shown in fig. 1. The shore side transport pipe 3 is connected to an onshore storage mechanism (e.g., an oil storage tank or the like), wherein the shore side transport pipe 3 is electrically connected to a ground bank. The ship side conveying pipe 2 and the shore side conveying pipe 3 are connected through an insulating flange 4, and the ship side conveying pipe and the shore side conveying pipe can be set to be antistatic metal hoses.
The resistance detection system according to the present utility model includes a monitoring circuit 5 and an alarm indicator (not shown) or the like. The terminals (or dedicated clamps) on the monitoring circuit 5 selectively conduct at least two positions of the offshore hull, the start end of the side transfer pipe 2 (see the detailed description below, where corresponds to port B), the end of the side transfer pipe 2 (corresponds to port C), the start end of the side transfer pipe 3 (corresponds to port D), and the end of the side transfer pipe 3 (corresponds to port E), respectively, and the connection terminals of the monitoring circuit 5 are connected to the ground strip circuit (corresponds to port F) to monitor the resistance between two positions of the at least two positions and the ground resistance between the sides of the ship.
The alarm indicator is in communication with the monitoring circuit 5. The monitoring circuit 5 has a trigger threshold, and when the resistance monitored by the monitoring circuit 5 exceeds the trigger threshold, the monitoring circuit 5 sends an alarm signal to the alarm indicator so that the alarm indicator gives an alarm.
For convenience of description below, in general, in connection with fig. 1, a port a is defined as a port for abutting the monitoring circuit 5 against the offshore hull, a port B is defined as a port for abutting the monitoring circuit 5 against the starting end of the side transfer pipe 2, a port C is defined as a port for abutting the monitoring circuit 5 against the terminating end of the side transfer pipe 2 (corresponding to the starting end of the insulating flange 4), a port D is defined as a port for abutting the monitoring circuit 5 against the starting end of the side transfer pipe 3 (corresponding to the terminating end of the insulating flange 4), a port E is defined as a port for abutting the monitoring circuit 5 against the terminating end of the side transfer pipe 3, and a port F is defined as a port for abutting the monitoring circuit 5 against the ground line circuit.
In an idle state in which oil transportation is not carried out between an offshore hull such as a tanker 1 and an onshore storage mechanism, the monitoring circuit 5 carries out online resistance detection between two points corresponding to a port B and a port C; and carrying out on-line resistance detection on the two points of the port D and the port F, and carrying out on-line resistance detection on the insulating flange 4 between the port C and the port D. In measuring the electrical continuity of the ship side transfer pipe 2 or the shore side transfer pipe 3, the trigger threshold between the measurement ports B and C and the ports D and F may be set to 10Ω (the trigger threshold of the ports B and C is the third trigger threshold R) 3 The trigger threshold between ports D and F (or port E) is a fourth trigger threshold R 4 ) The method comprises the steps of carrying out a first treatment on the surface of the When measuring the ports C and D (i.e. when measuring the resistance of the insulating flange 4), the corresponding trigger threshold (first trigger threshold R 1 ) Whether greater than 1kΩ or 25kΩ (where 1kΩ corresponds to domestic standards and 25kΩ corresponds to domestic standards).
Alternatively, a third trigger threshold R 3 Fourth trigger threshold R 4 Alternatively 4Ω or 100deg.OMEGA, which can be determined according to the requirements of national or international standards that the shore transfer line used in the resistance detection system of the present utility model is required to meet.
It will be appreciated that in the above-described idle state, the electrical resistance between the ports B, C detected by the resistance detection system represents the electrical continuity of the side transfer pipe 2; the electrical resistance between the detected ports D, E represents the electrical continuity of the shore side transfer pipe 3; the resistance between the ports C, D detected represents the insulating property of the insulating flange 4; the resistance between the ports D, F detected represents the ground resistance of the shore side transfer pipe 3.
The working state of oil transportation is carried out between an offshore hull such as a tanker and an onshore storage mechanism, and optionally, a monitoring circuit 5 carries out on-line resistance detection between two points corresponding to a port A and a port C; and carrying out on-line resistance detection between the two points of the port D and the port F, and not detecting the port C and the port D. The resistance threshold between ports a and C, D and F can be set to 10Ω (the trigger threshold for ports B and C is substantially the same as the resistance between ports a and C, so the trigger threshold can be set to a third trigger threshold R 3 )。
According to the above arrangement, in order to realize real-time measurement of the ground resistance, the corresponding port F on the ground circuit is in a conductive state in real time. Similar to the idle state, the on state of each port in the oil state may be similarly understood. For example, the measured resistance of the port A, C is represented by the ground resistance of the boat side piping 2.
Based on the above various electrical connection modes, the resistance detection system of the utility model can measure the electrical continuity of various pipelines and the resistance between the insulating flange 4 and the ship shore, and send out an alarm when the resistance between the corresponding ports exceeds the corresponding threshold value.
The monitoring circuit 5 in the resistance detection system is preferably arranged in the flameproof housing and is provided with an intrinsic safety circuit, so that the safety level of resistance detection, electrostatic discharge and stray current release is increased. Wherein, the flameproof housing should preferably ensure that the explosion-proof level of the monitoring circuit 5 meets the requirements of Ex Db ia II C T Gb, ex ia tb III C T ℃ Db, which can be installed directly in the site hazard area.
In connection with fig. 1, the monitoring circuit 5 preferably has a safety isolation circuit and an explosion proof intrinsic safety arrangement. Specifically, the test lines 1#, 2#, 3# connected to the outside of the monitoring circuit 5 are all designed in an explosion-proof intrinsic safety (Ex ia) manner, and have the function of isolating and shielding signals in a dangerous area, namely, ensuring that the signals of the test lines 1#, 2#, 3# connected to the outside are all explosion-proof safety signals and are isolated from the signals output to the safe area.
Optionally, the monitoring circuit 5 of the ship-shore transportation pipeline system is in communication connection with an associated pump valve 6 for controlling the on-off of the ship-shore transportation pipeline, the monitoring circuit 5 selectively switching on the respective ports according to the signal of the associated pump valve 6. The conduction mode can be performed according to the above. Based on the design, the information of whether oil transportation is carried out and the conduction state of the corresponding wiring terminal of the monitoring circuit 5 can be interlocked and connected, so that the safety and the management level of oil transportation or dangerous chemicals are further improved.
In addition, the associated pump valve 6 is optionally configured to be able to close the shore transfer line in response to an alarm signal. In connection with fig. 1, the signal to the associated pump valve 6 is herein denoted "interlock signal" in order to facilitate distinguishing between the alarm signal to the associated pump valve 6 and the alarm signal to the alarm indicator. When the monitoring circuit monitors the abnormal condition that the field resistance does not meet the standard requirement, the monitoring circuit can be interlocked with the associated pump valve 6 to cut off the operation in time so as to realize the purpose of safe operation of the system after the fault is removed. As an alternative, a relay control signal may be sent to the associated pump valve 6 to control the operation of the associated pump valve 6.
As an alternative or in addition to the redundant control scheme described above, provided with an associated pump valve 6, the monitoring circuit 5 of the present resistance detection system may optionally be provided with a switch. The user realizes the switching of the working state or the idle state by a remote control or a field switching switch.
According to a preferred embodiment of the utility model, the alarm indicator can be any device which can play a role in warning, such as an indicator lamp, a loudspeaker and the like. Different types of indicator lamps or horns can be arranged for the shore side transfer pipe 3, the ship side transfer pipe 2 and the insulating flange 4. The indicator lights may be colored and flashing differently to indicate different information exceeding the trigger threshold. Similarly, the horn may be indicated by sound waves of different frequency bands, volumes, and different information exceeding the trigger threshold.
A display capable of displaying the resistance of each monitoring target is optionally arranged on the alarm indicator, so that whether the current resistance of the corresponding target is close to a corresponding trigger threshold value or not can be conveniently judged, and a user can conveniently collect corresponding information in advance to judge whether maintenance or replacement of each component part is required in advance or not.
Optionally, 485 communication devices can be arranged on the monitoring circuit 5 so as to transmit the resistance data acquired in the field to the monitoring center in real time.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, and such changes and modifications fall within the scope of the utility model.
Claims (10)
1. The utility model provides a resistance monitoring system of ship shore transfer line, wherein, ship shore transfer line includes the ship side conveyer pipe of being connected with the offshore hull, the shore side conveyer pipe of being connected with on-shore storage mechanism and connects ship side conveyer pipe with the insulating flange of shore side conveyer pipe, its characterized in that: the resistance monitoring system includes:
the monitoring circuit is connected with the ground row circuit of the shore base to monitor the resistance between two positions of the at least two positions and the resistance between the ship sides; and
an alarm indicator in communication with the monitoring circuit,
the monitoring circuit is provided with a trigger threshold, and when the resistance monitored by the monitoring circuit exceeds the trigger threshold, the monitoring circuit sends an alarm signal to the alarm indicator so that the alarm indicator sends an alarm.
2. A resistance monitoring system for a ship-shore transfer line according to claim 1, wherein said ship-side transfer line and said shore-side transfer line are antistatic metal hoses.
3. A shore transportation pipeline resistance monitoring system according to claim 2, wherein said monitoring circuit is in communication with an associated pump valve for controlling the on-off of said shore transportation pipeline, and said monitoring circuit selectively turns on said at least two positions of said offshore hull, starting end of a side transportation pipe, ending end of a side transportation pipe, according to signals of said associated pump valve.
4. A resistance monitoring system for a ship-shore transfer line as claimed in claim 3, wherein said associated pump valve is configured to close said ship-shore transfer line in response to said alarm signal.
5. The system for monitoring the resistance of a shore transfer line of claim 4, wherein said trigger threshold comprises a first trigger threshold R corresponding to a terminating end of said side transfer line and a starting end of said side transfer line 1 And a first trigger threshold R 1 Is 1KΩ or 25KΩ, when the resistance monitored by the monitoring circuit is smaller than the first trigger threshold R 1 And when the monitoring circuit sends an alarm signal to the alarm indicator.
6. A shore transportation pipeline resistance monitoring system according to claim 4, wherein said touch-up isThe threshold value comprises a first trigger threshold value R corresponding to the ending end of the ship side conveying pipe and the starting end of the shore side conveying pipe 1 The first trigger threshold R 1 2500KΩ, when the resistance monitored by the monitoring circuit is greater than the first trigger threshold R 1 And when the monitoring circuit sends an alarm signal to the alarm indicator.
7. A shore transfer line resistance monitoring system according to claim 5 or 4, wherein said trigger threshold comprises a third trigger threshold R corresponding to the beginning and ending of said side transfer line 3 The third trigger threshold R 3 Is 4Ω, 10Ω or 100deg.OMEGA, when the resistance monitored by the monitoring circuit is greater than the third trigger threshold R 3 And when the monitoring circuit sends an alarm signal to the alarm indicator.
8. The shore transfer line resistance monitoring system of claim 7, wherein said trigger threshold includes a fourth trigger threshold R corresponding to a start and finish end of said shore transfer line 4 The fourth trigger threshold R 4 And the third trigger threshold R 3 The same applies.
9. A shore transportation pipeline resistance monitoring system according to claim 1, wherein said dedicated clamp is a removable grounding clamp.
10. A shore transportation pipeline resistance monitoring system according to claim 1, wherein the alarm indicator is a horn or an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024553.5U CN219082819U (en) | 2023-01-05 | 2023-01-05 | Resistance monitoring system of ship shore conveying pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024553.5U CN219082819U (en) | 2023-01-05 | 2023-01-05 | Resistance monitoring system of ship shore conveying pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN219082819U true CN219082819U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320024553.5U Active CN219082819U (en) | 2023-01-05 | 2023-01-05 | Resistance monitoring system of ship shore conveying pipeline |
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| CN (1) | CN219082819U (en) |
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- 2023-01-05 CN CN202320024553.5U patent/CN219082819U/en active Active
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