CN116118992A - Ventilation system of B type LNG fuel cabin empty place - Google Patents

Ventilation system of B type LNG fuel cabin empty place Download PDF

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Publication number
CN116118992A
CN116118992A CN202211415083.1A CN202211415083A CN116118992A CN 116118992 A CN116118992 A CN 116118992A CN 202211415083 A CN202211415083 A CN 202211415083A CN 116118992 A CN116118992 A CN 116118992A
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CN
China
Prior art keywords
airtight
explosion
butterfly valve
ventilation system
electric butterfly
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Pending
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CN202211415083.1A
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Chinese (zh)
Inventor
安毓辉
王弢
冯丰
张晓红
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708th Research Institute of CSIC
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708th Research Institute of CSIC
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Priority to CN202211415083.1A priority Critical patent/CN116118992A/en
Publication of CN116118992A publication Critical patent/CN116118992A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/02—Ventilation; Air-conditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B11/00—Interior subdivision of hulls
    • B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a ventilation system of an empty place of a B-type LNG fuel tank, which comprises a gas leakage detector and a pressure sensor, wherein the gas leakage detector and the pressure sensor are both arranged in the formed empty place between the LNG fuel tank and an outer bulkhead, an exhaust pipeline which is communicated with the inner side and the outer side of the outer bulkhead is penetrated through and connected with the outer bulkhead in a sealing manner, an airtight electric butterfly valve for switching a passage between the empty place and the outside atmosphere is arranged on the exhaust pipeline, an explosion-proof exhaust fan is arranged on one side of the airtight electric butterfly valve, which is connected with the outside atmosphere, and the explosion-proof exhaust fan, the airtight electric butterfly valve, the gas leakage detector and the pressure sensor are respectively and electrically connected with a PLC control module. The ventilation system provided by the invention has the advantages of compact structure and convenience in installation, and meanwhile, the ventilation system is provided with the PLC control module, so that the ventilation requirements of the air-conditioned space in different states can be met according to the gas detection and pressure sensing of the air-conditioned space.

Description

Ventilation system of B type LNG fuel cabin empty place
Technical Field
The invention relates to a B-type LNG fuel tank (the B-type tank is a structural type of the fuel tank and mainly comprises three types of A/B/C, the LNG fuel tank is a tank for loading LNG fuel, and the Chinese meaning of LNG is liquefied natural gas) air vent system in an empty place, and belongs to the field of ship manufacturing.
Background
With the CO of the government and the international maritime organization of China 2 、NO X And SO X The emission requirements of (c) are continuously raised and more ships are beginning to use more economical and environment-friendly gas fuel. A maintenance platform is arranged in the space between the heat insulation structure of the B-type LNG cabin of the dual-fuel ship and the outer cabin wall and is used for entering and maintaining daily personnel; in ship navigation, inert gas is filled in the empty space to remove air and water vapor, so that the dryness and a certain pressure environment of the empty space are maintained; when the LNG fuel tank leaks or is in an accident state, dangerous gas exists in the empty place, and when the amount of the dangerous gas reaches a certain concentration, the maintenance personnel can harm the health and even the life of the personnel when maintaining the LNG fuel tank, and emergency accident ventilation is needed to be provided at the moment, so that the dangerous gas is discharged as soon as possible.
The presently disclosed patent CN113443116a discloses a liquefied gas carrier and a ventilation method for its cargo hold, which provides ventilation of the cargo hold.
The documents Zhou Zhixian, yang Lingkang and Wu Hairong disclosed in the national academic literature network publishing general library are the key technologies of the design of the LNG dual-fuel power ship, the design of the marine engineering and 2014 (4), and the papers are aimed at the design key points of the dual-fuel engine ship, and analyze the arrangement of LNG fuel tanks, the selection of storage tanks, the fuel filling mode, the design of a double-wall pipe ventilation system, the design of a special-requirement exhaust system and other dual-fuel ship designs. Ventilation systems for cabins and double-walled pipes are mentioned herein.
The literature "Zhao Meng, guo Dongxue" is published in the national academic literature network publishing general library, and is aimed at the division of dangerous areas of dual-fuel ships, analysis of dangerous areas, the division of dangerous areas at fuel tanks, the division of dangerous areas at ventilation inlets and outlets, the division of dangerous areas at C-shaped tanks and the like. The focus in this context is on the hazard zone division, and for ventilation it is mentioned only "the LNG related hazard zone should be continuously ventilated, the ventilation line inlet and outlet should be high enough to avoid setting the closure means required in the load line convention. ".
Disclosure of Invention
The invention aims to solve the technical problems that: how to design a ventilation system suitable for the B-type LNG fuel tank empty place under the normal working state/accident state/personnel maintenance state, can meet the ventilation requirements under various states, and ensures the environment and personnel safety of the empty place.
In order to solve the technical problems, the technical scheme of the invention provides a ventilation system of an empty place of a B-type LNG fuel cabin, which is characterized by comprising a gas leakage detector and a pressure sensor, wherein the gas leakage detector and the pressure sensor are both arranged in the formed empty place between the LNG fuel cabin and an outer bulkhead, an exhaust pipeline communicated with the inner side and the outer side of the outer bulkhead is penetrated and connected on the outer bulkhead in a sealing manner, an airtight electric butterfly valve for switching a passage between the empty place and the outside atmosphere is arranged on the exhaust pipeline, an explosion-proof exhaust fan is arranged on one side of the airtight electric butterfly valve connected with the outside atmosphere, and the explosion-proof exhaust fan, the airtight electric butterfly valve, the gas leakage detector and the pressure sensor are respectively and electrically connected with a PLC control module; the gas leakage detector and the pressure sensor feed signals back to the PLC control module in real time, and the PLC control module judges whether to open or close the airtight electric butterfly valve and the explosion-proof exhaust fan according to the signals fed back by the gas leakage detector and the pressure sensor.
Preferably, when the gas leakage detector detects that the concentration of the gas to be detected exceeds a set value, alarming and opening an airtight electric butterfly valve and an explosion-proof exhaust fan through a PLC control module; when the pressure measured by the pressure sensor is lower than a set value, alarming and opening an airtight electric butterfly valve and an explosion-proof exhaust fan through a PLC control module; when the pressure measured by the pressure sensor is higher than another set value, alarming and opening an airtight electric butterfly valve and an explosion-proof exhaust fan through a PLC control module; when the signals fed back by the gas leakage detector and the pressure sensor are both in normal set values, the airtight electric butterfly valve is closed and the explosion-proof exhaust fan is closed through the PLC control module.
Preferably, the exhaust pipeline comprises at least one airtight exhaust pipe, one end of each airtight exhaust pipe is arranged in the air-reserving place, the other end of each airtight exhaust pipe penetrates through the outer bulkhead and is connected to the outer bulkhead in a sealing mode, and the exhaust end of each airtight exhaust pipe is provided with an airtight electric butterfly valve and an explosion-proof exhaust fan which are used for exhausting air in the air-reserving place.
Preferably, the exhaust pipeline further comprises a plurality of exhaust gratings, and each airtight exhaust pipe is uniformly provided with a plurality of exhaust gratings; each airtight exhaust pipe is communicated with the empty place through a plurality of exhaust grids.
Preferably, the airtight electric butterfly valve and the explosion-proof exhaust fan are arranged on the outer side of the outer bulkhead.
Preferably, the airtight electric butterfly valve is arranged in linkage with the explosion-proof exhaust fan.
Preferably, the airtight electric butterfly valve is in an airtight normally closed state, is controlled to be opened or closed by a PLC control module according to signals of the gas leakage detector and the pressure sensor, discharges air at the empty place to the outside atmosphere when opened, ensures the airtight state of the empty place when closed, and can bear the filling pressure of inert gas in the airtight state.
Preferably, a manhole cover is arranged on one side of the outer bulkhead; the manhole cover is a passage for personnel to maintain and enter the space, and is also used as a ventilation inlet.
Preferably, the air outlet end of the explosion-proof exhaust fan is provided with a ventilating duct.
Preferably, the explosion-proof exhaust fan, the airtight electric butterfly valve, the airtight exhaust pipe, the exhaust grid, the gas leakage detector and the pressure sensor are all explosion-proof, spark-free and low-temperature-resistant structures.
The temperature of the B-type LNG fuel tank is lower when the empty place is in a normal working state, inert gas is filled in the B-type LNG fuel tank, and certain pressure bearing property and sealing property are required; emergency exhaust is needed in the accident state, so that the concentration of dangerous gas in the place is reduced; in the personnel maintenance state, personnel need to enter, inert gas in the place needs to be removed, and a good and safe environment is provided. Therefore, the ventilation system of the invention is designed to meet the requirements of all states, not only ensure good pressure bearing performance and air tightness in normal working state, but also rapidly and effectively discharge dangerous gas in accident loading state, simultaneously rapidly and effectively discharge inert gas in personnel maintenance state, and ensure the safety of environment and personnel.
Compared with the prior art, the invention has the beneficial effects that:
1) The ventilation system consists of a ventilation tube, an explosion-proof exhaust fan, an airtight electric butterfly valve, an airtight air tube, an exhaust grid, a gas leakage detector, a pressure sensor, a PLC control module and a manhole cover, and is convenient to connect and install. The working state of the ventilation system can be automatically controlled according to the gas concentration and pressure change of the air-stay place, the ventilation requirements of the air-stay place in different states are met, and the environment and personnel safety of the air-stay place are ensured.
2) The whole ventilation system is controlled by a PLC, is automatically adjusted, is simple to operate, and can be operated according to different state requirements of the empty place.
3) The ventilation system provided by the invention is an independent system, is suitable for the structure of the B-type LNG fuel tank with smaller space at the space, and the ventilation pipeline is of an airtight design, so that the gas can be ensured not to leak under the pressure in the tank when the space is filled with inert gas.
The ventilation system provided by the invention has the advantages of compact structure and convenience in installation, and meanwhile, the ventilation system is provided with the PLC control module, so that the automatic adjustment of the explosion-proof exhaust fan and the airtight electric butterfly valve can be realized according to the gas detection and pressure sensing of the space, the ventilation requirements of the space in different states can be met, and the environment and personnel safety of the space are ensured.
Drawings
FIG. 1 is a schematic diagram of a ventilation system for the empty space of a B-type LNG fuel tank;
FIG. 2 is a schematic diagram of the connection of an airtight exhaust duct.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
The invention provides a ventilation system of an empty place of a B-type LNG fuel cabin, which is shown in figure 1 and comprises a ventilation tube 1, an explosion-proof exhaust fan 2, an airtight electric butterfly valve 3, an airtight exhaust tube 4, an exhaust grid 5, a gas leakage detector 6, a pressure sensor 7, a manhole cover 8 and a PLC control module 9, wherein the ventilation tube 1 is arranged at the air outlet end of the explosion-proof exhaust fan 2 and is used for providing a passage for exhaust air of the explosion-proof exhaust fan 2; the gas leakage detector 6 and the pressure sensor 7 are both arranged in a formed space 12 between the LNG fuel tank 10 and the outer bulkhead 11, the outer bulkhead 11 is penetrated and connected with an exhaust pipeline communicated with the inner side and the outer side of the outer bulkhead 11 in a sealing manner, the exhaust pipeline is provided with an airtight electric butterfly valve 3 for switching a passage between the space 12 and the outside atmosphere, one side of the airtight electric butterfly valve 3 connected with the outside atmosphere is provided with an explosion-proof exhaust fan 2, the airtight electric butterfly valve 3 is arranged in linkage with the explosion-proof exhaust fan 2, and the airtight electric butterfly valve 3, the gas leakage detector 6 and the pressure sensor 7 are respectively electrically connected with the PLC control module 9; the gas leakage detector 6 and the pressure sensor 7 feed signals back to the PLC control module 9 in real time, and the PLC control module 9 judges whether to open or close the airtight electric butterfly valve 3 and the explosion-proof exhaust fan 2 according to the signals fed back by the gas leakage detector 6 and the pressure sensor 7.
The exhaust pipeline comprises an airtight exhaust pipe 4 and an exhaust grille 5 at the tail end for exhausting air. The exhaust medium is dangerous gas or inert gas. In this embodiment, one end of the airtight exhaust pipe 4 is disposed in the space 12, and the other end of the airtight exhaust pipe 4 passes through the outer bulkhead 11 and is connected to the outer bulkhead 11 in a sealing manner, and the airtight electric butterfly valve 3 and the explosion-proof exhaust fan 2 are both disposed outside the outer bulkhead 11. A plurality of exhaust gratings 5 are uniformly distributed on the airtight exhaust pipe 4; the airtight exhaust duct 4 is connected to the air space 12 through a plurality of exhaust grilles 5.
The exhaust end of the airtight exhaust pipe 4 is provided with an airtight electric butterfly valve 3 for ensuring the air tightness of the space 12 and interlocking with the explosion-proof exhaust fan 2. The exhaust end of the airtight exhaust pipe 4 is provided with an explosion-proof exhaust fan 2 for exhausting air from the space 12.
The explosion-proof exhaust fan 2 is interlocked with the airtight electric butterfly valve 3, and is started or stopped according to the opening or closing state of the airtight electric butterfly valve 3, and the gas in the empty place 12 is exhausted to the outside atmosphere during starting;
the airtight electric butterfly valve 3 is in an airtight normally closed state, is interlocked with the explosion-proof exhaust fan 2, is controlled by the PLC control module 9 according to signals of the gas leakage detector 6 and the pressure sensor 7, is opened or closed, discharges air in the empty place 12 to the outside atmosphere when opened, ensures the airtight state of the empty place 12 when closed, and can bear the filling pressure of inert gas in the airtight state;
airtight exhaust duct 4: the air is discharged from the air-reserving place 12, and the air tightness is ensured under a certain cabin pressure;
exhaust grille 5: exhaust end equipment;
gas leak detector 6: the gas leakage detector 6 is a gas concentration sensor, and the dangerous gas is mainly composed of methane gas of liquefied natural gas, and feeds back a signal to the PLC control module 9, and when the concentration exceeds a set value, the gas leakage detector alarms (in the embodiment, an audible and visual alarm can be performed by outputting an alarm signal) and the PLC control module 9 opens the airtight electric butterfly valve 3 and opens the explosion-proof exhaust fan 2;
pressure sensor 7: the pressure feedback device is used for feeding back the pressure of the empty place 12, feeding back a signal to the PLC control module 9 when the pressure is lower than a set value, alarming, opening the airtight electric butterfly valve 3 through the PLC control module 9 and opening the explosion-proof exhaust fan 2; when the pressure is higher than another set value, feeding back a signal to the PLC control module 9, alarming (in the embodiment, audible and visual alarm can be performed by outputting an alarm signal) and opening the airtight electric butterfly valve 3 and opening the explosion-proof exhaust fan 2 through the PLC control module 9;
manhole cover 8: personnel maintenance access passage to be used for ventilation import concurrently, when manhole cover 8 was opened, and empty stay department 12 was in the decompression state, and pressure sensor 7 action was reported to the police and is opened airtight electric butterfly valve 3 and open explosion-proof exhaust fan 2 through PLC control module 9, and the inert gas in the room 12 is discharged before personnel gets into, guarantees personnel and gets into safety.
The PLC control module 9: according to the signal fed back by the pressure sensor 7, the state is judged, the airtight electric butterfly valve 3 is correspondingly opened/closed, and the explosion-proof exhaust fan 2 is opened/stopped.
When the signal fed back by the pressure sensor 7 is in a normal set value or range (some pressure sensors can set a pressure range, and some pressure sensors can only set a pressure value), the pressure in the position is stable, and the ventilation system is in a normal working state, and is in an airtight closing state; when the pressure of the pressure sensor 7 is higher than a set value and the gas leakage detector 6 alarms, the LNG fuel tank 10 has the possibility of gas leakage and is in an accident state, and the ventilation system is started to exhaust air in an accident; when personnel enter, the manhole cover 8 is opened, the pressure in the place is lost, the pressure of the pressure sensor 7 is lower than a set value, and the ventilation system is started to exhaust air.
The explosion-proof exhaust fan 2, the airtight electric butterfly valve 3, the airtight exhaust pipe 4, the exhaust grid 5, the gas leakage detector 6 and the pressure sensor 7 all need to have explosion-proof and spark-free requirements and need to resist low temperature.
The connection point of the airtight exhaust duct 4 (here, the connection point is the connection point of the exhaust duct connecting the outside bulkhead and the inside, here, the airtight is needed, the exhaust duct in the cabin does not need to be airtight, mainly, the airtight integrity is needed to be ensured by passing through the outside airtight bulkhead.) is glued with silicone mixture, and the rubber tape is wrapped outside, as shown in fig. 2.
The working principle of the invention is as follows:
the space 12 is in a positive pressure state filled with inert gas when the ship sails in a normal working state, and the ventilation system is kept closed and airtight; when the accident state of the air stay place 12 is in existence, the LNG dangerous gas leaks, and at the moment, the ventilation system is started to rapidly discharge the leaked dangerous gas; when the maintenance state of the space 12 is maintained, personnel need to open the manhole cover 8 to enter, the pressure is lost at the moment, the ventilation system starts to discharge inert gas of the space 12, and the gas in the cabin is quickly recovered to the atmosphere outside through ventilation, so that the personnel can safely enter.
When the PLC control module 9 opens the airtight electric butterfly valve 3 and the explosion-proof exhaust fan 2 for a period of time, and signals fed back by the gas leakage detector 6 and the pressure sensor 7 are in normal set values, the airtight electric butterfly valve 3 and the explosion-proof exhaust fan 2 are automatically controlled to be closed by the PLC control module 9.
The ventilation system is suitable for the situation that the empty place of the B-type LNG fuel tank is in a normal working state/accident state/personnel maintenance state, and can meet the ventilation requirements in various states.
The ventilation system can ensure complete air tightness of the blank space 12 of the B-type LNG fuel tank 10 under a certain pressure after filling inert gas in the blank space under a normal working state; when the LNG fuel tank 10 leaks, and is in an accident state, the airtight electric butterfly valve 3 can be automatically opened according to feedback signals of the gas leakage detector 6 and the pressure sensor 7 to the PLC control module 9, the explosion-proof exhaust fan 2 is started to effectively ventilate, dangerous gas is rapidly exhausted, the concentration of the dangerous gas in the empty place 12 is reduced, and the environmental safety requirement of the empty place 12 of the LNG fuel tank 10 is ensured; in the personnel maintenance state, the manhole cover 8 is opened, the pressure in the space-time stay 12 is lost, the pressure sensor 7 feeds back signals to the PLC control module 9, the airtight electric butterfly valve 3 is automatically opened, the explosion-proof exhaust fan 2 is started to effectively ventilate, inert gas in the space is rapidly exhausted, safe and effective ventilation is provided before personnel enter, and a good and safe environment is provided. The switching of the various states should be capable of automatic control.

Claims (10)

1. The ventilation system of the B-type LNG fuel cabin space is characterized by comprising a gas leakage detector (6) and a pressure sensor (7), wherein the gas leakage detector (6) and the pressure sensor (7) are arranged in a space (12) formed between an LNG fuel cabin (10) and an outer bulkhead (11), an exhaust pipeline communicated with the inner side and the outer side of the outer bulkhead (11) is penetrated and connected on the outer bulkhead (11) in a sealing manner, an airtight electric butterfly valve (3) for switching a passage between the space (12) and the outside atmosphere is arranged on the exhaust pipeline, an explosion-proof exhaust fan (2) is arranged on one side, connected with the outside atmosphere, of the airtight electric butterfly valve (3), and the gas leakage detector (6) and the pressure sensor (7) are respectively and electrically connected with a PLC control module (9); the gas leakage detector (6) and the pressure sensor (7) feed signals back to the PLC control module (9) in real time, and the PLC control module (9) judges whether to open or close the airtight electric butterfly valve (3) and the explosion-proof exhaust fan (2) according to the signals fed back by the gas leakage detector (6) and the pressure sensor (7).
2. A ventilation system for a reserved place of a type B LNG fuel tank according to claim 1, characterized in that when the gas leakage detector (6) detects that the concentration of the gas to be detected exceeds a set value, an alarm is given and a PLC control module (9) opens an airtight electric butterfly valve (3) and an explosion-proof exhaust fan (2); when the pressure measured by the pressure sensor (7) is lower than a set value, alarming and opening the airtight electric butterfly valve (3) and the explosion-proof exhaust fan (2) through the PLC control module (9); when the pressure measured by the pressure sensor (7) is higher than another set value, alarming and opening the airtight electric butterfly valve (3) and opening the explosion-proof exhaust fan (2) through the PLC control module (9); when signals fed back by the gas leakage detector (6) and the pressure sensor (7) are both at normal set values, the airtight electric butterfly valve (3) is closed and the explosion-proof exhaust fan (2) is closed through the PLC control module (9).
3. A ventilation system for a B-type LNG fuel tank space according to claim 1, wherein the exhaust pipeline comprises at least one airtight exhaust pipe (4), one end of each airtight exhaust pipe (4) is arranged in the space (12), the other end of each airtight exhaust pipe (4) passes through the outer bulkhead (11) and is connected to the outer bulkhead (11) in a sealing manner, and the exhaust end of each airtight exhaust pipe (4) is provided with an airtight electric disc valve (3) and an explosion-proof exhaust fan (2) for exhausting air from the space (12).
4. A ventilation system for a reserved place of a type B LNG fuel tank according to claim 3, wherein the exhaust pipeline further comprises a plurality of exhaust gratings (5), and each airtight exhaust pipe (4) is uniformly provided with a plurality of exhaust gratings (5); each airtight exhaust pipe (4) is communicated with the air-reserving place (12) through a plurality of exhaust grids (5).
5. A ventilation system for a B-type LNG fuel tank space according to claim 1 or 3, characterized in that the airtight electric butterfly valve (3) and the explosion-proof exhaust fan (2) are both arranged outside the outer bulkhead (11).
6. A ventilation system for a reserved place of a type B LNG fuel tank according to claim 1, wherein the airtight electric butterfly valve (3) is interlocked with the explosion-proof exhaust fan (2).
7. A ventilation system of a B-type LNG fuel tank space according to claim 1, wherein the airtight electric butterfly valve (3) is in airtight normally closed state, and is controlled to be opened or closed by the PLC control module (9) according to signals of the gas leakage detector (6) and the pressure sensor (7), and the air of the space (12) is discharged to the outside atmosphere when opened, and the airtight state of the space (12) is ensured when closed, and the ventilation system can bear the filling pressure of inert gas in the airtight state.
8. A ventilation system for a B-type LNG fuel tank space according to claim 1, wherein a manhole cover (8) is provided on one side of the outer tank wall (11); the manhole cover (8) is a passage for personnel to repair and enter the space (12) and is also used as a ventilation inlet.
9. The ventilation system of the blank space of the type-B LNG fuel tank of claim 1, wherein the air outlet end of the explosion-proof exhaust fan (2) is provided with a ventilator (1).
10. The ventilation system of the blank space of the type-B LNG fuel tank as claimed in claim 1, wherein the explosion-proof exhaust fan (2), the airtight electric butterfly valve (3), the airtight exhaust pipe (4), the exhaust grid (5), the gas leakage detector (6) and the pressure sensor (7) are of explosion-proof and spark-free structures and can resist low temperature.
CN202211415083.1A 2022-11-11 2022-11-11 Ventilation system of B type LNG fuel cabin empty place Pending CN116118992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211415083.1A CN116118992A (en) 2022-11-11 2022-11-11 Ventilation system of B type LNG fuel cabin empty place

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211415083.1A CN116118992A (en) 2022-11-11 2022-11-11 Ventilation system of B type LNG fuel cabin empty place

Publications (1)

Publication Number Publication Date
CN116118992A true CN116118992A (en) 2023-05-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211415083.1A Pending CN116118992A (en) 2022-11-11 2022-11-11 Ventilation system of B type LNG fuel cabin empty place

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