Film type LNG transport ship deck instrument box

Abstract

The utility model discloses a thin film type LNG transport ship deck instrument box, which is characterized in that the deck instrument boxes are arranged on dome decks of a header area and a cargo hold area, and instrument pipes of all measuring devices in each deck instrument box penetrate through a protective cover in a concentrated manner and are connected with respective corresponding detected pipelines; on the premise that the using functions of all measuring devices are met, the instrument pipes on the deck are arranged simply and orderly, the arrangement requirement of ship pipelines is met, and maintenance personnel can easily access the instrument box to conduct necessary overhaul and replacement.

Description

TECHNICAL FIELD

[0001] The utility model relates to shipbuilding technical field especially relates to a membrane type LNG transport ship deck instrument box. BACKGROUND

[0002] The membrane type LNG transport ship is a kind of key sea transport tool, for safely and efficiently transport liquefied natural gas. In these ships, deck space is very limited, also considering the flammable and explosive nature of LNG, therefore need special attention and careful design.

[0003] At present, the existing membrane type LNG transport ship deck instrument box arrangement mode has some challenges and deficiencies. First, each instrument equipment is dispersedly arranged, cannot fully optimize deck space utilization efficiency, leads to the arrangement compactness of each instrument equipment not high, brings inconvenience to maintenance and operating personnel, in addition, also can reduce the reliability and easy maintenance of LNG transport ship as a whole. Most importantly, in the harsh marine environment, instrument equipment is easily corroded and damaged. SUMMARY

[0004] Therefore, the utility model provides a membrane type LNG transport ship deck instrument box to solve the problems in the above background art.

[0005] A kind of membrane type LNG transport ship deck instrument box, the deck instrument box is arranged on the dome deck of header region and cargo hold region, each deck instrument box includes the base fixed on dome deck, the instrument box for installing various measuring devices is arranged on base, the bottom of base is provided with discharge port, discharge port is equipped with discharge plug, the top of base and the bottom of instrument box are sealedly connected, the instrument tube of each measuring device in instrument box is respectively connected with its corresponding detected pipeline, each measuring device in instrument box is also connected with ship central control system by signal line.

[0006] Preferably, the instrument tube of each measuring device is connected with its corresponding detected pipeline by penetrating from the protective shell thereof, and the protective shell is supported by the support frame.

[0007] Preferably, the pipeline end of each instrument tube is provided with an isolation valve.

[0008] Preferably, the instrument tube and the isolation valve are made of 316L stainless steel.

[0009] Preferably, the base and the instrument box are sealedly connected by a sealing gasket.

[0010] Preferably, the deck instrument box of header region and cargo hold region is arranged on one side of personnel passage.

[0011] Preferably, a deck instrument box is arranged on the dome deck of the fore and aft of each cargo hold area of the cargo hold area, and a deck instrument box is arranged on the left and right sides of the dome deck of the header area.

[0012] Preferably, the observation window of the deck instrument box of the header area faces the stern of the ship.

[0013] The beneficial effects of the present application are as follows:

[0014] 1. The measuring devices are arranged in the instrument box, which can provide sufficient physical isolation between the measuring devices, the LNG storage tank and the operating system, so as to reduce the risk of fire and explosion to the greatest extent. The deck instrument boxes are arranged on the dome decks of the header area and the cargo hold area, and the instrument pipes of the measuring devices in each deck instrument box are connected to the corresponding detected pipelines through the protective cover shell. The arrangement of the instrument pipes on the deck is simple and orderly, which can meet the arrangement requirements of the pipelines of the ship, make full use of the deck space and provide sufficient working area, and enable the maintenance personnel to easily access the instrument box and perform necessary maintenance and replacement.

[0015] 2. The instrument box is mounted on the base, and the base and the instrument box are sealingly connected. The base, the instrument pipe, the isolation valve and the protective cover shell are made of corrosion-resistant materials, which can cope with seawater, salt mist and harsh weather conditions, ensure that the measuring devices can operate stably for a long time in harsh environments, and greatly reduce the maintenance requirements and the downtime of the ship.

[0016] 3. The base is provided with a drain plug. If the sealing between the base and the instrument box fails, the seawater and other fluids entering the base can be drained through the drain plug, so as to avoid the influence or damage of the water vapor in the instrument box on the measuring devices in the instrument box.

[0017] 4. The deck instrument boxes are arranged on the dome decks of the header area and the cargo hold area, which optimizes the utilization of the deck space, improves the safety, reliability and maintainability of the measuring devices, and brings important technical progress and economic benefits to the operation and management of the thin-film LNG transport ship. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a structural schematic view of the utility model.

[0020] The meanings of the reference numerals in the drawing are as follows:

[0021] 1 is an instrument box, 2 is a sealing gasket, 3 is a base, 4 is a relief plug, 5 is a protective shell, 6 is an instrument tube, 7 is a support frame, 8 is an isolation valve, 9 is a pipeline to be detected, 10 is a cable through-piece, 11 is a signal line, and 12 is a ship central control system. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model will be described below through the specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0023] The terms used in the present disclosure are merely for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0024] In order to better understand the technical scheme of the utility model, the utility model will be described in detail below in combination with the drawings.

[0025] The utility model provides a kind of membrane type LNG transport ship deck instrument box, the deck instrument box is arranged on the dome deck of manifold area and cargo hold area.

[0026] Specifically, one deck instrument box is respectively arranged on the left and right sides of the dome deck of manifold area, and the dome deck of the bow and stern of each cargo hold of the cargo hold area is usually provided with a plurality of liquid cargo holds, and one deck instrument box is arranged on the dome deck of the bow and stern of each cargo hold.

[0027] The deck instrument box of the above-mentioned manifold area and cargo hold area is arranged on one side of personnel passage, so as to leave enough maintenance space, and facilitate observation and maintenance.

[0028] Preferably, the observation window of the deck instrument box of the manifold area is arranged towards the ship stern, so that the reading of the pressure gauge can be observed in situ in the cargo control room through the camera.

[0029] Each deck instrument box comprises a base 3 fixed on the dome deck, an instrument box 1 provided on the base 3 for mounting various measuring devices, a drain opening is provided at the bottom of the base 3, a drain plug 4 is arranged in the drain opening, the top of the base 3 is sealingly connected with the bottom of the instrument box 1, the instrument tubes 6 of the various measuring devices in the instrument box 1 are respectively connected with their respective corresponding detected pipelines 9, the various measuring devices in the instrument box 1 are further connected with the ship central control system through signal lines 11, the signal lines 11 are usually selected as cables, and the signal lines 11 are connected with the ship central control system after penetrating through the cable penetrating member 10 with sealing filler.

[0030] Specifically, the base 3 is composed of a base body and a plurality of triangular support plates uniformly distributed on the outer side of the base body, the base body is a regular or irregular inner hollow steel structure, the top of the base body is open, the instrument box 1 is fixed on the top of the base body by bolts or other means, and the plurality of triangular support plates are vertically fixed on the outer side of the base body, and the triangular support plates play a supporting and stabilizing role. In this embodiment, the base body is a cubic structure, and the triangular support plates are vertically fixed on each face of the base body, and the triangular support plates are also perpendicular to the dome deck.

[0031] The instrument box 1 is provided with pressure sensors, pressure gauges, pressure switches, temperature sensors, thermometers and other measuring devices.

[0032] Preferably, the instrument tubes 6 of the various measuring devices in the instrument box 1 are concentrated to pass through their protective casings 5 and then connected with their respective corresponding detected pipelines 9, and the protective casings 5 are supported by support frames 7. On the one hand, the protective casings 5 can protect the instrument tubes 6 from being damaged or corroded by rainwater, seawater and the like, and on the other hand, the protective casings 5 can constrain the instrument tubes 6 together and lay them on the deck along the same laying path, so as to ensure the neatness of the deck surface and improve the space utilization rate of the deck surface.

[0033] Preferably, the pipeline ends of each instrument tube 6 are provided with an isolation valve 8, which is a valve for switching or connecting the medium flow in the pipeline, and can safely cut off the fluid and place the fluid medium leakage in order to protect the safety of the operator and the normal operation of the instrument box.

[0034] In this embodiment, the instrument tubes 6 and the protective casings 5 are made of low-temperature 316L stainless steel material to meet the requirements of corrosion resistance and prevent damage caused by sea waves; the isolation valves 8 are made of low-temperature 316L stainless steel material, which can meet the use of low-temperature working conditions and sufficient corrosion resistance.

[0035] In the embodiment, the base 3 is made of Q235B steel plate, and the base 3 is sealingly connected with the instrument box 1 through the sealing gasket 2, so that a sealing space is formed at the bottom of the instrument box 1 to prevent water vapor from entering the instrument box from below, and meanwhile, corrosion of seawater to the dome deck can be reduced. If the sealing between the base 3 and the instrument box 1 fails and seawater enters the bottom of the instrument box, the drain plug 4 at the bottom of the base 3 can be opened to drain the seawater in the base 3.

[0036] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A membrane type LNG carrier deck instrument box, characterized in that: The deck instrument boxes are arranged on the dome decks of the manifold area and the cargo hold area. Each deck instrument box comprises a base (3) fixed on the dome deck, an instrument box (1) arranged on the base (3) for installing various measuring devices, a discharge port is provided at the bottom of the base (3), a discharge plug (4) is provided in the discharge port, the top of the base (3) and the bottom of the instrument box (1) are sealed, the instrument tubes (6) of the various measuring devices in the instrument box (1) are respectively connected to their corresponding detected pipelines (9), and the various measuring devices in the instrument box (1) are also connected to the ship's central control system via signal lines (11).

2. The membrane-type LNG carrier deck instrument box according to claim 1, characterized in that: The instrument tubes (6) of the various measuring devices pass through their protective covers (5) and are then connected to their corresponding detected pipelines (9), and the protective covers (5) are supported by a support frame (7).

3. The membrane-type LNG carrier deck instrument box according to claim 1 or 2, characterized in that: An isolation valve (8) is provided at the end of each instrument pipe (6).

4. The membrane-type LNG carrier deck instrument box according to claim 3, characterized in that: The instrument pipe (6) and the isolation valve (8) are both made of 316L stainless steel.

5. The membrane-type LNG carrier deck instrument box according to claim 1, characterized in that: The base (3) and the instrument box (1) are sealed and connected via a sealing gasket (2).

6. The membrane-type LNG carrier deck instrument box according to claim 1, characterized in that: The deck instrument boxes in the manifold area and cargo hold area are both located on the side of the personnel passage.

7. The membrane-type LNG carrier deck instrument box according to claim 1, characterized in that: A deck instrument box is provided on the dome deck at the bow and stern of each cargo hold in the cargo hold area, and a deck instrument box is provided on the left and starboard sides of the dome deck in the manifold area.

8. The membrane-type LNG carrier deck instrument box according to claim 7, characterized in that: The deck instrument box in the header area has an observation window facing the stern.

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