CN215674753U - Split type composite structure double-wall anti-leakage device for liquid phase online internal monitoring of marine fuel tank - Google Patents
Split type composite structure double-wall anti-leakage device for liquid phase online internal monitoring of marine fuel tank Download PDFInfo
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- CN215674753U CN215674753U CN202021866664.3U CN202021866664U CN215674753U CN 215674753 U CN215674753 U CN 215674753U CN 202021866664 U CN202021866664 U CN 202021866664U CN 215674753 U CN215674753 U CN 215674753U
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Abstract
The utility model discloses a split type composite structure double-wall anti-leakage device for online internal monitoring of a marine fuel tank liquid phase, which comprises an inner pipe and an anti-leakage device sleeved outside the inner pipe, wherein the inner pipe is coaxial and axial with the anti-leakage device, connecting flanges are arranged at two ends of the inner pipe, the anti-leakage device is divided into an upper structural part and a lower structural part, and the two structural parts are connected and combined through respective alignment connecting flanges; the two ends of the two structural members are respectively provided with a fixed connecting flange; a detection sensor and an alarm device are arranged between the interlayers of the inner pipe and the leakage-proof device, the sensor is in signal connection with a control center, and the control center is in protocol instruction alarm device; the device is convenient to disassemble and install and maintain.
Description
The technical field is as follows:
the utility model relates to a liquid-phase double-wall pipe of a fuel tank for an LNG ship, in particular to a split type composite structure double-wall anti-leakage device for online internal monitoring of the liquid phase of the fuel tank for the ship.
Background art:
from the existing patent literature and the actual production situation, we can know that: the double-wall pipe of the fuel supply system for the LNG ship adopts two sets of independent gas supply systems, the inner pipe of the double-wall pipe is filled with LNG fuel under the conditions of constant temperature and pressure, the double-wall pipe leakage prevention device is filled with air, detection points are arranged on the wall of the leakage prevention device, the double-wall pipe leakage prevention device is used for performing safety detection and protection on possible LNG fuel leakage, the inner pipe is normally under pressure bearing, the outer pipe is not under pressure bearing, and only the double-wall pipe leakage prevention device is used for performing leakage shielding protection.
The double-wall pipe in the prior art comprises an inner pipe and an outer pipe, and the inner pipe and the outer pipe are usually combined by adopting a welding process, the process is complex, the damping performance between the inner pipe and the outer pipe is poor, and a fuel supply system has large vibration during working and is easy to break and leak. And the inner pipe and the outer pipe are not easy to disassemble, and the inner pipe and the outer pipe are welded together, so when one of the inner pipe and the outer pipe leaks, the whole body cannot be used continuously, and the replacement cost is high.
In the prior art, a filling mode is adopted to fix the inner pipe in the outer pipe, the process is complex in the mode, and the problem of high replacement cost is not solved.
Particularly, the bent pipe is more complicated in structure, so that the processing and installation cost and the seal pressing convenience and working efficiency can be greatly reduced if a more convenient mode can be provided.
The utility model content is as follows:
the technical purpose is to overcome the defects in the prior art, and provide a marine fuel tank liquid phase online internal monitoring split type composite structure double-wall leakage-proof device which has the advantages of reasonable structural design, convenient assembly and disassembly, low replacement cost and good damping performance.
In order to solve the problems, the technical scheme adopted by the scheme is as follows: a split type composite structure double-wall anti-leakage device for online internal monitoring of a marine fuel tank liquid phase comprises an inner pipe and an anti-leakage device sleeved outside the inner pipe, wherein the inner pipe is coaxial and axial with the anti-leakage device, connecting flanges are arranged at two ends of the inner pipe, the anti-leakage device is divided into an upper structural part and a lower structural part, and the two structural parts are connected and combined through respective alignment connecting flanges; the two ends of the two structural members are respectively provided with a fixed connecting flange;
a detection sensor and an alarm device are arranged between the interlayer of the inner pipe and the leakage-proof device, and the sensor is in signal connection with a control center which is in protocol instruction alarm device.
And an emptying pipe and an emptying valve are arranged on a lower structural part of the lower half part of the anti-leakage device.
The upper structural member and the lower structural member are provided with a groove correspondingly on the aligning connecting flange respectively, and a sealing gasket is arranged in the groove.
The anti-leakage device is internally provided with a supporting structure for fixing the inner pipe.
The supporting structure is one or more of a fixed support and flexible gasket mechanism or a multidirectional locking steel wire or multidirectional gasket supporting structure mode.
The fixed connecting flange is connected with the connecting flange of the inner pipe or connected with the supporting structure or connected with a fixed structure arranged on the ship body.
The sensor is an LNG sensor, and the sensor is one or two mixed use modes of a wireless sensor or a wired sensor.
The sensor is an LNG sensor and is arranged in a single space, and the space is communicated with the interlayer of the inner leakage-proof device and the interlayer of the leakage-proof device.
The double-wall pipe with the composite structure is characterized in that the number of the inner pipes is n, and n is larger than or equal to 1.
The leakage-proof device is a pipeline bus, m units are arranged in the leakage-proof device, and m is larger than or equal to 1; n inner tubes are arranged in each unit, and n is not less than 1; and a leakage sensor is correspondingly arranged in each unit.
Because this split type composite construction double-walled anti-leakage device of marine fuel tank liquid phase on-line internal monitoring adopts above-mentioned technical scheme, after the inner tube is connected, the components of a whole that can function independently structure of preventing leakage device cup joints outside this inner tube about or about, and the installation can be accomplished to house ornamentation gasket, locking screw.
Another technical advantage is that the elbow connection portion can be made large, and the elbow portion is directly arranged in the elbow connection portion, so that the installation is more convenient.
The inner pipe is damaged in common conditions, if the inner pipe is damaged, the inner pipe can be replaced by disassembling the screw of the anti-leakage device, and the installation and the disassembly are very convenient; if the leakage-proof device is damaged, the leakage-proof device can be directly replaced or repaired.
Meanwhile, the leakage monitoring and monitoring are arranged outside the leakage prevention device at present and exposed in the air, so that more monitoring instruments are required to be arranged, and in the scheme, the space of the leakage prevention device can be arranged according to requirements, so that the monitoring and monitoring instruments can be arranged in the leakage prevention device, and in the interlayer space outside the inner seal, each composite structure pipe is independently arranged, so that the control center can judge the leakage condition in time according to the signal of the sensor, and the positioning monitoring can be realized.
The supporting structure is arranged in the anti-leakage device and used for fixing the inner pipe and preventing the inner pipe from vibrating to cause damage or crack leakage, so that the safe and stable service life of the equipment is prolonged.
If a leak is monitored or detected, an evacuation valve provided in the leak-proof device may be opened to discharge the leak, and then the equipment may be repaired or replaced.
Description of the drawings:
fig. 1 is a front structural schematic diagram of the split-type composite structure double-wall anti-leakage device for online liquid-phase internal monitoring of the marine fuel tank.
Fig. 2 is a right-side structural schematic diagram of the split type composite structure double-wall anti-leakage device for liquid-phase online internal monitoring of the marine fuel tank.
Fig. 3 is a schematic top view of the split composite structure double-wall anti-leakage device for liquid phase online internal monitoring of the marine fuel tank of the present invention.
Fig. 4 is a structural schematic diagram of a bent pipe of the split-type composite structure double-wall anti-leakage device for online internal monitoring of the liquid phase of the marine fuel tank.
Fig. 5 is a schematic diagram of the bus structure of the split-type composite structure double-wall anti-leakage device for liquid phase online internal monitoring of the marine fuel tank of the present invention.
The specific implementation mode is as follows:
as shown in fig. 1, 2, 3, 4: a split type composite structure double-wall leakage-proof device for liquid phase online internal monitoring of a marine fuel tank comprises an inner pipe 2 and a leakage-proof device 1 sleeved outside the inner pipe, wherein the leakage-proof device of the inner pipe is coaxial and axial, two ends of the inner pipe 2 are provided with connecting flanges 21 and 22 (the whole structure of the inner pipe is not shown due to the section in the drawing), the upper structural part 11 and the lower structural part 12 are correspondingly provided with grooves 111 and 121 respectively on the aligning connecting flanges, a sealing gasket 7 is arranged in the groove, the leakage-proof device 1 is divided into the upper structural part 11 and the lower structural part 12, and the two structural parts are connected and combined through respective aligning connecting flanges 112 and 122; the two ends of the two structural members are respectively provided with a fixed connecting flange 113 and a fixed connecting flange 123; the lower structural part 12 of the leak preventer 1, which is mounted on the lower half, is provided with an evacuation pipe 124 and an evacuation valve 125.
The inside of the leakage preventing device is provided with a supporting structure 8 for fixing the inner pipe. The supporting piece is used for fixing the inner tube in the leakage-proof device and comprises an upper piece and a lower piece which are symmetrically arranged, a clamping part used for clamping the inner tube is formed between the upper piece and the lower piece, two groups of elastic supporting arms which are abutted against the inner wall of the leakage-proof device are arranged on the upper piece, and the two groups of elastic supporting arms are symmetrically distributed on the upper piece. The supporting structure 8 is one or more of a fixed supporting and flexible gasket mechanism or a supporting structure mode of a multidirectional locking steel wire or a multidirectional gasket. The anti-leakage device also comprises a lining plate which is arranged between the elastic supporting arms and the inner wall of the anti-leakage device. The elastic supporting arm comprises a supporting part and a connecting part, wherein the supporting part and the connecting part are formed by punching and bending, and the supporting part is connected with the upper piece through the connecting part.
A detection sensor 4 and an alarm device 5 are arranged between an interlayer 3 of the inner pipe 2 and the leakage-proof device 1, the signal 4 of the sensor is connected with a control center 6, and the control center 6 is used for commanding the alarm device 5. The sensor 4 is an LNG sensor, and the sensor is one or a mixture of a wireless sensor and a wired sensor.
The sensor 4 is an LNG sensor and is arranged in a separate space which is communicated with the interlayer of the inner and leakage-proof devices. Composite structure double-walled pipe, its inner tube 1 quantity is n, and n ≧ 1.
The leakage-preventing device 1 is a pipeline bus, as shown in fig. 3, m units are arranged in the leakage-preventing device, and m is larger than or equal to 1; n inner tubes are arranged in each unit, and n is not less than 1; and a leakage sensor is correspondingly arranged in each unit.
As shown in fig. 5, a pipeline bus 9 includes units 951, 952 to 95m composed of pipe walls 971, 972 to 97n, in which inner pipes 911, 912 to 91n are disposed, and the support structures 961, 962 to 96n fixedly connected to the inner pipes 951, 952 to 95n, and leak sensors 901, 902 to 90n, and an upper cover 98 is disposed on the upper portion of each unit and is connected to the pipe walls 971, 972 to 97n by flange screws 941, 942 to 94n and sealing gaskets 931, 932, 93n to form a closed space, and an evacuation pipe and an evacuation valve are disposed on the bottom of each unit (not shown in the drawings, and those skilled in the art can implement this description without ambiguity).
The structure can also be arranged longitudinally according to the requirement of pipeline arrangement so as to save space.
The connecting part is bent upwards and makes marine product require factor of safety high, especially to installing the fuel jar in the deck below, the shell can not be as secondary shielding, need set up exclusive secondary shielding for the liquid phase pipeline that sets up below the liquid level, the device is prevented leaking in this way, set up the one deck shielding again at the outer wall of liquid phase pipeline promptly, there is the defect like inner tube pipeline butt weld department, lead to leaking like this, the liquid of leaking can get into in preventing leaking the device, just so avoided the pipeline to leak the risk that leads to the whole vacuum failure of fuel jar, the liquid of leaking finally leads to outside preventing leaking the device through double-walled pipe, discharge. The design pressure of the anti-leakage device is equal to the maximum working pressure of the inner pipe, the wall thickness of the anti-leakage device is calculated according to the design pressure, the pressure bearing capacity of the connecting structure is also calculated, full penetration is guaranteed during welding of the double-wall pipe, and the weld joint is subjected to 10% RT nondestructive testing.
Claims (9)
1. Split type composite construction double-walled anti-leakage device is monitored in marine fuel tank liquid phase on line, including the anti-leakage device outside this interior pipe of inner tube and suit, the inner tube the coaxial axial of anti-leakage device, the inner tube both ends are provided with flange, its characterized in that:
the anti-leakage device is divided into an upper structural part and a lower structural part, and the two structural parts are connected and combined through respective alignment connecting flanges; the two ends of the two structural members are respectively provided with a fixed connecting flange;
a detection sensor and an alarm device are arranged between the interlayer of the inner pipe and the leakage-proof device, and the sensor is in signal connection with a control center which is in protocol instruction alarm device.
2. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: and an emptying pipe and an emptying valve are arranged on a lower structural part of the lower half part of the anti-leakage device.
3. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: the upper structural member and the lower structural member are provided with a groove correspondingly on the aligning connecting flange respectively, and a sealing gasket is arranged in the groove.
4. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: the anti-leakage device is internally provided with a supporting structure for fixing the inner pipe.
5. The marine fuel tank liquid phase online internal monitoring split type composite structure double-wall leakage prevention device according to claim 4, characterized in that: the supporting structure is one or more of a fixed support and flexible gasket mechanism or a multidirectional locking steel wire or multidirectional gasket supporting structure mode.
6. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: the sensor is an LNG sensor, and the sensor is one or two mixed use modes of a wireless sensor or a wired sensor.
7. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: the sensor is an LNG sensor and is arranged in a single space, and the space is communicated with the interlayer of the inner leakage-proof device and the interlayer of the leakage-proof device.
8. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: the double-wall pipe with the composite structure is characterized in that the number of the inner pipes is n, and n is larger than or equal to 1.
9. The split type composite structure double-wall leakage-proof device for the liquid-phase online internal monitoring of the marine fuel tank according to claim 1, characterized in that: the leakage-proof device is a pipeline bus, m units are arranged in the leakage-proof device, and m is larger than or equal to 1; n inner tubes are arranged in each unit, and n is not less than 1; and a leakage sensor is correspondingly arranged in each unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866664.3U CN215674753U (en) | 2020-08-31 | 2020-08-31 | Split type composite structure double-wall anti-leakage device for liquid phase online internal monitoring of marine fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866664.3U CN215674753U (en) | 2020-08-31 | 2020-08-31 | Split type composite structure double-wall anti-leakage device for liquid phase online internal monitoring of marine fuel tank |
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| Publication Number | Publication Date |
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| CN215674753U true CN215674753U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021866664.3U Active CN215674753U (en) | 2020-08-31 | 2020-08-31 | Split type composite structure double-wall anti-leakage device for liquid phase online internal monitoring of marine fuel tank |
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| CN (1) | CN215674753U (en) |
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2020
- 2020-08-31 CN CN202021866664.3U patent/CN215674753U/en active Active
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