CN213932627U - Temperature monitoring and prevent leaking device suitable for LNG storage tank - Google Patents
Temperature monitoring and prevent leaking device suitable for LNG storage tank Download PDFInfo
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- CN213932627U CN213932627U CN202022793587.XU CN202022793587U CN213932627U CN 213932627 U CN213932627 U CN 213932627U CN 202022793587 U CN202022793587 U CN 202022793587U CN 213932627 U CN213932627 U CN 213932627U
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Abstract
The utility model discloses a temperature monitoring and prevent leaking device suitable for LNG storage tank, including the winding on inner tank outer wall and including, the temperature measurement optic fibre that the annular laid in the heat preservation of the annular space bottom plate department between outer storage tank, it has insulation material to fill between inner tank and the outer storage tank, the head end and the tail end of temperature measurement optic fibre are connected with the one end of the data acquisition template in the junction box, the other end and the temperature measurement host computer of data acquisition template are connected, the temperature measurement host computer is connected with control system. The outer storage tank is provided with a gas one-way valve and an alarm, the gas one-way valve is connected with a vacuum pump, and the vacuum pump is connected with a collecting pipe. The device has the functions of monitoring the temperature in real time and accurately positioning the leakage point, and has long service life and good system stability.
Description
Technical Field
The utility model relates to a temperature monitoring and prevent leaking the device, especially relate to a temperature monitoring and prevent leaking the device suitable for LNG storage tank.
Background
Current LNG storage tank includes inner tank and the outer storage tank of interval cover outside inner tank, and temperature monitoring device generally controls the temperature through arranging certain quantity of thermal resistance RTD in annular space and storage tank bottom, and the device has a great deal of shortcoming: the RTDs are arranged in a network node form, only the temperature at monitoring nodes can be extracted in actual measurement, the temperature between the monitoring points cannot be measured, and a large measurement blind area exists; when the leakage point is far away from the RTD monitoring point and the leakage amount is not large, the monitoring of the leakage signal can generate serious lag; RTD monitoring storage tank temperature field need introduce the signal of telecommunication inside the storage tank and with storage tank structural material contact, has certain potential safety hazard.
Disclosure of Invention
An object of the utility model is to overcome prior art's shortcoming, provide one kind can in time monitor leak, cover monitoring area, accurate location leak the temperature monitoring who is applicable to the LNG storage tank of position and prevent leaking the device.
The utility model discloses a LNG storage tank temperature monitoring and leak-proof device, including twine on inner tank outer wall and in the heat preservation of the annular space bottom plate department between inner and outer storage tank a temperature measurement optic fibre of circle is laid to the ring form, the interval setting between every circle of temperature measurement optic fibre, inner storage tank and outer storage tank between fill and be filled with insulation material, the upper portion head end and the bottom tail end of temperature measurement optic fibre pass insulation material along being on a parallel with inner storage tank axial direction respectively and stretch out the annular space setting between inner storage tank and outer storage tank, the head end and the tail end of temperature measurement optic fibre are connected with the one end of data acquisition template in the junction box, the other end of data acquisition template be connected with the temperature measurement host computer through communication optic fibre, the temperature measurement host computer passes through the control line with control system and is connected outer storage tank on install gaseous check valve, gaseous check valve pass through vacuum rubber tube with the air inlet of vacuum pump and be connected, the exhaust port of the vacuum pump is connected with the collecting pipe, an alarm is fixed at the top end of the outer storage tank, and the alarm, the gas one-way valve and the vacuum pump are respectively connected with the control system through control lines.
The utility model has the advantages that:
the utility model discloses can obtain the real-time temperature of the full surface of LNG storage tank and the temperature distribution along storage tank intermediate layer ground round, the real-time temperature of on-line monitoring and temperature variation trend can in time discover the storage tank and leak, in case collect combustible gas after confirming to leak. The distributed optical fiber temperature measuring device can replace a large number of point sensors, realize comprehensive coverage, quickly monitor leakage points in real time and accurately position the leakage points; the problems of difficult wiring and large networking workload caused by the fact that the number of the monitoring storage tanks is large in the traditional device are avoided, the service life of the distributed temperature measurement optical fiber is long, the long-term maintenance cost is reduced, the distributed temperature measurement optical fiber is free from various electromagnetic interferences, and the stability of a temperature measurement system is ensured.
Drawings
Fig. 1 is a schematic structural view of a temperature detection device in a temperature monitoring and leakage prevention device for an LNG storage tank according to the present invention;
fig. 2 is a schematic structural view of a leakage-proof device in the temperature monitoring and leakage-proof device for the LNG storage tank of the present invention;
fig. 3 is the utility model is suitable for a temperature monitoring of LNG storage tank and prevent leaking the control chart of device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The figures are simplified schematic diagrams illustrating the basic structure of the invention in a schematic way only, and therefore they show only the components relevant to the invention.
As shown in the figure, the utility model provides a LNG storage tank temperature monitoring and leak-proof device, including winding on inner tank outer wall and including, outer storage tank annular space bottom plate department's heat preservation in the annular lay a temperature measurement optic fibre 3 of round, the interval sets up between every circle of temperature measurement optic fibre 3 inner tank and outer storage tank between fill and have insulation material, upper portion head end and the bottom tail end of temperature measurement optic fibre 3 pass insulation material along being on a parallel with 1 axial direction of inner tank respectively and stretch out inner tank 1 and outer storage tank 2 between the annular space setting, the head end and the tail end of temperature measurement optic fibre 3 are connected with the one end of the data acquisition template in junction box 4, the other end of data acquisition template pass through communication optic fibre and be connected with temperature measurement host computer 5, temperature measurement host computer 5 is connected through the control line with control system 6. The outer storage tank 2 is provided with a gas one-way valve 8, the gas one-way valve 8 is connected with the gas inlet of the vacuum pump 7 through a vacuum rubber tube, and the gas outlet of the vacuum pump 7 is connected with a collecting pipe 9. An alarm 10 is fixed to the top end of the outer tank 2. The alarm 10, the gas one-way valve 8 and the vacuum pump 7 are respectively connected with the control system 6 through control lines.
Preferably, the temperature measuring optical fiber 3 adopts a redundant configuration and is used for standby. The winding of reserve temperature measurement optic fibre is on interior storage tank outer wall and including, the annular lays the round in the heat preservation of the annular space bottom plate department between the outer storage tank, the interval sets up between every circle of reserve temperature measurement optic fibre, upper portion head end and the bottom tail end of reserve temperature measurement optic fibre pass insulation material along being on a parallel with 1 axial direction of inner storage tank respectively and stretch out the annular space setting between inner storage tank 1 and the outer storage tank 2.
The working principle is as follows:
when the system works, analog signals measured by the temperature measuring optical fibers 3 are converted into electric signals and are displayed on the temperature measuring host 5 through the junction box 4, and real-time temperature and leakage monitoring of the whole surface of the LNG storage tank is carried out. When the local temperature change of the monitoring interval of the inner storage tank 1 and the outer storage tank 2 of the LNG storage tank exceeds a preset alarm value or the trend and the speed of the temperature change exceed the set alarm value, an abnormal area is displayed on the temperature measurement host 5, the vacuum pump 7 and the gas one-way valve 8 are started at the same time, leaked gas is pumped into the collecting pipe 9, and sound and light alarm is given out through the alarm 10. The utility model discloses can real-time supervision temperature and temperature variation trend, can in time discover the storage tank and leak to take corresponding treatment, guarantee safety.
In light of the above, the present invention is not limited to the above-described embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (2)
1. The utility model provides a LNG storage tank temperature monitoring and prevent leaking device which characterized in that: the temperature measurement device comprises a temperature measurement optical fiber (3) which is wound on the outer wall of an inner storage tank and is annularly laid in a heat insulation layer at the bottom plate of an annular space between the inner storage tank and an outer storage tank, wherein each circle of the temperature measurement optical fiber (3) is arranged at intervals, a heat insulation material is filled between the inner storage tank and the outer storage tank, the head end and the tail end of the upper part of the temperature measurement optical fiber (3) respectively penetrate through the heat insulation material along the axial direction parallel to the inner storage tank (1) and extend out of the annular space between the inner storage tank (1) and the outer storage tank (2), the head end and the tail end of the temperature measurement optical fiber (3) are connected with one end of a data acquisition template in a junction box (4), the other end of the data acquisition template is connected with a temperature measurement host (5) through a communication optical fiber, the temperature measurement host (5) is connected with a control system (6) through a control line, a gas one, the gas check valve (8) is connected with the gas inlet of the vacuum pump (7) through a vacuum rubber tube, the gas outlet of the vacuum pump (7) is connected with the collecting pipe (9), an alarm (10) is fixed at the top end of the outer storage tank (2), and the alarm (10), the gas check valve (8) and the vacuum pump (7) are respectively connected with the control system (6) through control lines.
2. An LNG storage tank temperature monitoring and leakage prevention apparatus according to claim 1, wherein: spare temperature measurement optic fibre twines on inner tank outer wall and including, lay the round in the heat preservation of the annular space bottom plate department between outer storage tank annularly, the interval sets up between every circle of spare temperature measurement optic fibre, upper portion head end and the bottom tail end of spare temperature measurement optic fibre pass insulation material along being on a parallel with inner tank (1) axial direction respectively and stretch out the annular space setting between inner tank (1) and outer storage tank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022793587.XU CN213932627U (en) | 2020-11-27 | 2020-11-27 | Temperature monitoring and prevent leaking device suitable for LNG storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022793587.XU CN213932627U (en) | 2020-11-27 | 2020-11-27 | Temperature monitoring and prevent leaking device suitable for LNG storage tank |
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| CN213932627U true CN213932627U (en) | 2021-08-10 |
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| CN202022793587.XU Active CN213932627U (en) | 2020-11-27 | 2020-11-27 | Temperature monitoring and prevent leaking device suitable for LNG storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022172050A1 (en) * | 2021-02-12 | 2022-08-18 | Ravil Ibatullin | Method and equipment to access and service inside a storage tank with coiled tubing |
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2020
- 2020-11-27 CN CN202022793587.XU patent/CN213932627U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022172050A1 (en) * | 2021-02-12 | 2022-08-18 | Ravil Ibatullin | Method and equipment to access and service inside a storage tank with coiled tubing |
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