CN215794311U - Marine vessel and marine storage tank thereof - Google Patents
Marine vessel and marine storage tank thereof Download PDFInfo
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- CN215794311U CN215794311U CN202121698372.8U CN202121698372U CN215794311U CN 215794311 U CN215794311 U CN 215794311U CN 202121698372 U CN202121698372 U CN 202121698372U CN 215794311 U CN215794311 U CN 215794311U
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- 238000003860 storage Methods 0.000 title claims abstract description 26
- 238000009423 ventilation Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 abstract description 6
- 239000002828 fuel tank Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 52
- 239000007789 gas Substances 0.000 description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 231100001261 hazardous Toxicity 0.000 description 9
- 239000003345 natural gas Substances 0.000 description 9
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 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
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a marine vessel and a marine storage tank thereof. This marine storage tank includes: a tank for storing cryogenic liquid; the fuel tank joint is arranged at one end of the tank body; the fuel tank joint comprises an inner hollow outer shell connected with the tank body and a hatch cover arranged on the outer shell in an openable and closable manner; the air lock chamber is coated on the shell from the outer side; the air lock chamber and the shell enclose to form a hollow and closed inner cavity, and the hatch cover is accommodated in the inner cavity; the ventilation pressure of the airlock is greater than the ventilation pressure at the fuel tank junction. Therefore, under the action of pressure difference, airflow only flows from the airlock room to the tank body connecting position, combustible dangerous gas at the tank body connecting position is prevented from leaking out, a dangerous area is prevented from being enlarged, the safety coefficient of the whole ship is improved, and the manufacturing cost is reduced.
Description
Technical Field
The utility model relates to the technical field of marine ships, in particular to a marine ship and a marine storage tank thereof.
Background
The CCS of China Classification is specified in the Specification of Natural gas Fuel for Ship application 9.2.2 that the gas tank connecting position belongs to a type 1 dangerous area, and the position containing a bolt cover leading to the gas tank connecting position belongs to a type 2 dangerous area.
According to the design and measures adopted at present, the division of the dangerous area of the natural gas storage tank under the deck is detailed in the following figure, and the following problems exist: since CCS specification 2.3.8 specifies: it is not allowed to provide an entrance to the hazardous area directly from the non-hazardous area, otherwise the hazardous area will be divided into hazardous areas, increasing the hazardous area range. Therefore, the provision of living areas in and near the hazardous areas is not allowed, which is disadvantageous for the arrangement of the whole ship, especially for ships with small ship space, which further compresses the living areas. The electrical equipment installed in the dangerous area needs explosion-proof requirements, and equipment purchasing cost is increased. Meanwhile, relevant detection, monitoring and alarm devices are required to be arranged in the dangerous area, and ventilation is carried out to the outside, so that the manufacturing cost of the whole ship is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a marine storage tank, which solves the problem that the natural gas storage tank in the prior art has a dangerous area, so that the whole ship is not favorable to arrangement and the manufacturing cost is increased.
The utility model also aims to provide a marine vessel which is provided with the marine storage tank.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a marine storage tank comprising: a tank for storing cryogenic liquid; the tank body connecting part is arranged on one end of the tank body; the tank body connecting part comprises an outer shell which is connected with the tank body and is hollow inside and a hatch which is arranged on the outer shell in an openable and closable way; the air lock chamber is coated on the shell from the outer side; the air lock chamber and the shell enclose to form a hollow and closed inner cavity, and the hatch cover is accommodated in the inner cavity; the ventilation pressure of the air lock chamber is greater than the ventilation pressure at the joint of the tank body; the air lock chamber is provided with a first air-tight door which can be opened and closed.
According to one embodiment of the utility model, a partition plate is arranged in an inner cavity of the air lock chamber, is fixedly connected with the inner wall of the inner cavity and divides the inner cavity into a first chamber and a second chamber; the partition plate is provided with a second air-tight door capable of being opened and closed, and the second air-tight door is opened to communicate the first cabin and the second cabin; the cabin cover is contained in the second cabin, the first airtight door is arranged on the outer wall of the first cabin in an openable and closable mode, and the ventilation pressure of the first cabin is larger than that of the second cabin.
According to an embodiment of the utility model, the volume of the first compartment is larger than the volume of the second compartment.
According to one embodiment of the utility model, the first compartment and the second compartment are spaced apart in the axial direction of the tank.
According to one embodiment of the utility model, the first compartment and the second compartment are both positively-ventilated.
According to one embodiment of the utility model, the tank connection is negative pressure vented.
According to one embodiment of the utility model, the first airtight door and the second airtight door are each provided with a self-closer.
According to one embodiment of the utility model, the marine tank further comprises an alarm; the alarm is arranged on the outer wall of the tank body or the air lock chamber and is electrically connected with the self-closing device.
According to one embodiment of the utility model, a plurality of locking members are arranged on the outer side of the hatch, and the hatch is fixedly connected with the shell through the locking members so as to seal the shell.
The embodiment also provides a marine vessel, which comprises a hull and a marine storage tank arranged on the hull; the hull has a main deck and a hold below the main deck; the marine storage tank is mounted in the cabin.
According to the technical scheme, the marine storage tank provided by the utility model at least has the following advantages and positive effects:
the air lock chamber is additionally arranged at the joint of the tank body of the marine storage tank, the range of dangerous areas of the ship is limited through the air lock chamber, and the marine storage tank is particularly suitable for the arrangement requirements of small space and dense equipment of the ship.
Specifically, the air lock chamber is coated on the shell at the joint of the tank body from the outer side, and a hollow and closed inner cavity is formed by enclosing the air lock chamber and the shell. The hatch cover of the shell is accommodated in the inner cavity so as to isolate the hatch cover from the outside. The air lock chamber is provided with a first airtight door which can be opened and closed. If the hatch needs to be opened to check the internal conditions of the tank body where it is connected, the operator must first open the first airtight door and then enter the air lock chamber. Because the ventilation pressure of the air lock chamber is greater than the ventilation pressure of the tank body connecting position, under the action of pressure difference, airflow only flows to the tank body connecting position from the air lock chamber, combustible dangerous gas at the tank body connecting position is prevented from leaking out, the dangerous area is prevented from being enlarged, the safety coefficient of the whole ship is improved, and the manufacturing cost is reduced.
Drawings
Fig. 1 is a schematic view of the internal structure of a marine vessel according to an embodiment of the present invention.
Fig. 2 is a partial structural schematic diagram of a marine storage tank according to an embodiment of the present invention.
Fig. 3 is a schematic top view of the marine tank of fig. 2.
Fig. 4 is a schematic structural diagram of a first airtight door and a second airtight door according to an embodiment of the present invention.
Fig. 5 is a top view of each of the airtight doors of fig. 4.
FIG. 6 is a schematic view of a hatch cover according to an embodiment of the present invention.
FIG. 7 is a top down schematic view of the hatch of FIG. 6.
The reference numerals are explained below:
300-main deck, 400-fuel tank,
100-marine storage tank,
1-a tank body,
2-tank body joint, 21-shell, 22-hatch, 201-air outlet, 202-air inlet,
3-air lock chamber, 30-partition board, 31-first chamber, 32-second chamber, 33-first airtight door, 34-second airtight door, 301-air outlet, 302-air inlet,
4-self-closing device,
5-locking piece.
Detailed Description
Exemplary embodiments that embody features and advantages of the utility model are described in detail below in the specification. It is to be understood that the utility model is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the utility model and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
Referring to fig. 1, the present embodiment provides a marine vessel and a marine storage tank 100 thereof. The hull of the marine vessel has a main deck 300 open to the air at the top, above the main deck 300, people move, and a hollow cabin is formed below the main deck 300. The interior of the hold is divided into a plurality of compartments including a fuel tank 400, a cargo hold, and other equipment areas. The marine tank 100 is correspondingly disposed in the fuel tank 400. The marine storage tank 100 stores therein a low temperature liquid, i.e., LNG, which is used as a fuel to provide power for the navigation of the marine vessel.
Referring to fig. 2, the marine storage tank 100 of the present embodiment includes a tank body 1, a tank body connecting portion 2 disposed at one end of the tank body 1, and an air lock chamber 3 disposed at the tank body connecting portion 2.
Wherein, the tank body 1 is a double-layer structure for storing the LNG in a low temperature state. The tank body 1 is horizontally arranged on the ship body, the axial direction of the tank body 1 is consistent with the length direction of the ship body, and the transverse direction of the tank body 1 is consistent with the width direction of the ship body.
The tank body connecting part 2 is arranged on one axial end of the tank body 1. The tank connecting station 2 includes an inner hollow outer shell 21 connected to the tank 1 and a hatch 22 openably and closably provided on the outer shell 21.
Wherein, the shell 21 is welded with the tank body 1, and the bottom of the shell is suspended and is not provided with any support. The inside of the housing 21 is provided with a piping system for supplying air to the power system of the ship, and various devices such as a monitoring device, an electric device, a ventilation device, and the like. The gas tank connection needs to meet the gas tightness requirement. Once the process pipe in the gas tank junction leaks, the leaking liquid or gas will be wrapped in the gas tank junction, negative pressure ventilation is performed through the ventilation pipe of the outer shell 21, and the combustible gas is discharged to a safe area.
The hatch 22 is normally closed to ensure that the casing 21 is in a sealed working condition to be able to serve as an emergency space in case of leakage of LNG. When regular maintenance or inspection of the leak is required, personnel can open the hatch 22 to gain access to the interior of the tank junction 2.
As for the classification of the dangerous area of the natural gas tank, as shown in fig. 1, the ship tank 100 belongs to a category 1 dangerous area (the category 1 dangerous area is denoted as S1) in the tank junction 2, the area of the hatch 22 near the tank junction 2 is a category 2 dangerous area (the category 2 dangerous area is denoted as S2), and the space in which the cabin adjacent to the hatch 22 is located is also a category 2 dangerous area. The risk factor for a category 2 hazardous area is lower than the risk factor for a category 1 hazardous area.
Referring to fig. 3, the airlock 3 is covered on the housing 21 from the outside. The air lock chamber 3 and the housing 21 enclose a hollow and closed inner cavity, and the cabin door is accommodated in the inner cavity. The airlock 3 is provided with a first airtight door 33 which can be opened and closed. The ventilation pressure of the airlock 3 is greater than the ventilation pressure of the tank connection 2.
Specifically, the airlock 3 is a hollow, elongated box. The airlock 3 is formed by sequentially welding and joining a plurality of rectangular metal plates. The air lock chamber 3 is arranged on one transverse side where the air tank is connected, and the length direction of the air lock chamber 3 is consistent with the axial direction of the tank body 1. In the embodiment, the air lock chamber 3 has small volume and occupied area, and the volume is far smaller than the volume of the air tank connection, so that excessive space in the ship is not required to be occupied, and the arrangement of equipment on the ship is facilitated.
When a leakage situation occurs and the internal situation of the connection place of the tank body 1 needs to be checked, a worker must open the first airtight door 33 and enter the air lock chamber 3 to open the hatch 22 of the connection place 2 of the tank body. Because the air pressure in the air lock chamber 3 is greater than the ventilation pressure of the tank body connecting part 2, under the action of pressure difference, air flow only flows to the tank body 1 connecting part from the air lock chamber 3, combustible dangerous gas at the tank body 1 connecting part is prevented from leaking out, the dangerous area is prevented from being enlarged, and the safety coefficient of the whole ship is improved.
Due to the existence of the air lock chamber 3, the range of a dangerous area of the natural gas storage tank is strictly limited, so that the space occupation of the dangerous area is smaller, and the harsher space arrangement requirements of certain ships with smaller sizes can be met; the reduction of the danger zone means that the number of safety-relevant detection and monitoring devices is also reduced, so that the equipment placement cost and the overall ship manufacturing cost can be reduced.
Preferably, a partition 30 is provided in the inner cavity of the airlock 3, and the partition 30 is fixedly connected to the inner wall of the inner cavity and divides the inner cavity into a first compartment 31 and a second compartment 32.
The plane of the partition 30 is parallel to the cross section of the can body 1. In this manner, the first compartment 31 and the second compartment 32 partitioned by the partition 30 are arranged at intervals in the axial direction of the can body 1. The partition 30 is provided with a second air-tight door 34 that can be opened and closed, and the second air-tight door 34 is opened to communicate the first chamber 31 and the second chamber 32. The lid 22 is housed inside the second chamber 32, the first airtight door 33 is provided openably and closably on the outer wall of the first chamber 31, and the ventilation pressure of the first chamber 31 is higher than that of the second chamber 32.
In this embodiment, the first chamber 31 and the second chamber 32 are both positively ventilated, i.e. the air pressure in both chambers is greater than the ambient air pressure. Specifically, the top of each cabin is provided with an air outlet 301, and the bottom of each cabin is correspondingly provided with an air inlet 302; the wind blows from the outside into the cabin through the air inlet 302, and is discharged through the air outlet 301 due to the large wind pressure in the room. Preferably, the volume of the first chamber 31 is larger than the volume of the second chamber 32.
The joint 2 of the tank body is ventilated by negative pressure, and the air pressure is less than the external atmospheric pressure. The top of the tank body connecting part 2 is provided with an air outlet 201, and the bottom of the tank body connecting part is provided with an air inlet 202. The air outlet 201 is correspondingly provided with a negative pressure fan, and the negative pressure fan can pump out the air inside to generate negative pressure. So, outside air can get into the inside of jar body junction 2 automatically under atmospheric pressure, realizes the negative pressure ventilation.
In other words, the first compartment 31 has the highest ventilation pressure, the second compartment 32 has the middle ventilation pressure and the tank connection 2 has the lowest ventilation pressure, according to the pressure classification.
The aim is to realize the transition from the dangerous area to the safe area by the first cabin 31 and the second cabin 32 which are arranged layer by layer, and limit the division of the dangerous area on the ship. Of course, in other embodiments, the interior of the airlock 3 is not limited to being divided into two compartments, and may be multiple to achieve better transition effects.
When the process pipeline in the gas tank connecting position leaks, the combustible gas detector at the gas tank connecting position immediately alarms and cuts off the supply of natural gas through the control system, negative pressure ventilation is carried out on the gas tank connecting position through the fan arranged on the outlet of the gas tank connecting position, and the leaked natural gas is discharged to a safe area through the pipeline. When the concentration of the natural gas is lower than a set value, the alarm is eliminated. The crew may now enter the tank connection through the first compartment 31 and the second compartment 32. First, after a crew member enters the first compartment 31, the outermost first airtight door 33 is automatically closed, and then when the second airtight door 34 is opened to enter the second compartment 32, since the positive pressure ventilation pressure of the first compartment 31 is higher than that of the second compartment 32, air in a safe area enters the second compartment 32 (i.e. the class 2 hazardous area) under the action of the pressure difference, so as to ensure that no flammable and leaking gas exists in the first compartment 31. The second chamber 32 is continuously ventilated, so that the safety is ensured; the hatch cover 22 is manually dismantled, the hatch cover 22 is opened and the second cabin 32 enters the gas tank connecting position, positive pressure ventilation is adopted in the second cabin 32, negative pressure ventilation is adopted in the gas tank connecting position, and therefore gas in the second cabin 32 enters the gas tank connecting position, the second cabin 32 is prevented from becoming a type 1 dangerous area, the range of the dangerous area is limited through the ventilation design and arrangement of the cabins, and the safety factor of the whole ship is improved.
Referring to fig. 4 and 5, the first airtight door 33 and the second airtight door 34 are each provided with a self-closing unit 4. Under the action of the self-closing device 4, each airtight door can be automatically closed in time and rapidly after being opened, and the respective closed states of the first cabin 31 and the second cabin 32 are ensured.
Further, the marine tank 100 further includes an alarm; the alarm is arranged on the outer wall of the tank body 1 or the air lock chamber 3 and is electrically connected with the two self-closing devices 4. If the first airtight door 33 and the second airtight door 34 are opened simultaneously, an alarm is given to ensure that the two airtight doors cannot be opened simultaneously.
Referring to fig. 6 and 7 together, a plurality of locking members 5 are provided on the outer side of the hatch 22, and the hatch 22 is connected and fixed to the housing 21 by the locking members 5 to seal the housing 21, thereby preventing the arbitrary and accidental entrance and exit of personnel while limiting the leakage of natural gas in the gas tank connection place. In this embodiment, the locking member 5 is a fastening bolt.
In summary, the marine storage tank 100 provided by the utility model has at least the following advantages and positive effects:
the marine storage tank 100 is additionally provided with the air lock chamber 3 at the tank body connecting position 2, and the range of dangerous areas of the ship is limited through the air lock chamber 3, so that the marine storage tank is suitable for the arrangement requirements of small space and dense equipment of the ship. The method specifically comprises the following steps: the air lock chamber 3 is covered on the casing 21 from the outside, and a hollow and closed inner cavity is formed between the air lock chamber 3 and the casing 21. The hatch 22 of the housing 21 is housed in the inner cavity to isolate the hatch 22 from the outside. The air lock chamber 3 is internally provided with two self-closing sealing doors which divide the area into a first cabin 31 and a second cabin 32, the first cabin 31 and the second cabin 32 are respectively provided with a ventilating pipeline for positive pressure ventilation of the internal space, so that transition from a dangerous area to a safe area is realized, and the division of the dangerous area on the ship is limited.
If it is desired to open the hatch 22 to check the internal conditions where the tank 1 is connected, the personnel must enter the airlock 3 and pass through the first compartment 31 and the second compartment 32 in sequence. Since the first compartment 31 is at its maximum and the second compartment 32 is at its middle, the tank connection 2 is at its minimum. Therefore, under the action of the pressure difference, the gas in the second chamber 32 enters the connecting position of the gas tank, so that the second chamber 32 is prevented from becoming a type 1 dangerous area, the range of the dangerous area is limited through the ventilation design and arrangement of the chambers, and the safety factor of the whole ship is improved.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A marine tank, comprising:
a tank for storing cryogenic liquid;
the tank body connecting part is arranged on one end of the tank body; the tank body connecting part comprises an outer shell which is connected with the tank body and is hollow inside and a hatch which is arranged on the outer shell in an openable and closable way;
the air lock chamber is coated on the shell from the outer side; the air lock chamber and the shell enclose to form a hollow and closed inner cavity, and the hatch cover is accommodated in the inner cavity; the ventilation pressure of the air lock chamber is greater than the ventilation pressure at the joint of the tank body; the air lock chamber is provided with a first air-tight door which can be opened and closed.
2. The marine storage tank of claim 1, wherein a partition is disposed in an inner cavity of the airlock, the partition being fixedly connected to an inner wall of the inner cavity and dividing the inner cavity into a first compartment and a second compartment; the partition plate is provided with a second air-tight door capable of being opened and closed, and the second air-tight door is opened to communicate the first cabin and the second cabin; the cabin cover is contained in the second cabin, the first airtight door is arranged on the outer wall of the first cabin in an openable and closable mode, and the ventilation pressure of the first cabin is larger than that of the second cabin.
3. The marine tank of claim 2, wherein said first compartment has a volume greater than a volume of said second compartment.
4. The marine tank of claim 2, wherein said first compartment and said second compartment are spaced apart along an axial direction of said tank.
5. The marine tank of claim 2, wherein said first compartment and said second compartment are both positive draft.
6. Marine tank according to claim 2, characterised in that the tank connection is negative pressure ventilation.
7. Marine tank according to claim 2, characterised in that the first airtight door and the second airtight door are each provided with a self-closing device.
8. The marine tank of claim 7 further comprising an alarm; the alarm is arranged on the outer wall of the tank body or the air lock chamber and is electrically connected with the self-closing device.
9. The marine tank of claim 1, wherein a plurality of locking members are provided on an outer side of the hatch, and the hatch is fixedly connected to the shell by the locking members to seal the shell.
10. A marine vessel comprising a hull and a marine tank as claimed in any one of claims 1 to 9 disposed on said hull; the hull has a main deck and a hold below the main deck; the marine storage tank is mounted in the cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121698372.8U CN215794311U (en) | 2021-07-23 | 2021-07-23 | Marine vessel and marine storage tank thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121698372.8U CN215794311U (en) | 2021-07-23 | 2021-07-23 | Marine vessel and marine storage tank thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215794311U true CN215794311U (en) | 2022-02-11 |
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ID=80184202
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121698372.8U Active CN215794311U (en) | 2021-07-23 | 2021-07-23 | Marine vessel and marine storage tank thereof |
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| Country | Link |
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| CN (1) | CN215794311U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117799758A (en) * | 2024-02-29 | 2024-04-02 | 中海油能源发展股份有限公司采油服务分公司 | Working cabin for floating production oil storage ship |
-
2021
- 2021-07-23 CN CN202121698372.8U patent/CN215794311U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117799758A (en) * | 2024-02-29 | 2024-04-02 | 中海油能源发展股份有限公司采油服务分公司 | Working cabin for floating production oil storage ship |
| CN117799758B (en) * | 2024-02-29 | 2024-05-10 | 中海油能源发展股份有限公司采油服务分公司 | Working cabin for floating production oil storage ship |
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