Arrangement structure of methanol cabin equipment accessories of methanol dual-fuel VLOC ship

Abstract

The invention discloses an arrangement structure of methanol cabin equipment accessories of a methanol dual-fuel VLOC ship, which comprises an exposed deck, an isolation void cabin and a methanol cabin, a plurality of guide pipes are arranged in the isolation void cabin between a methanol cabin top plate and the exposed deck, the top ends of the guide pipes are communicated with the exposed deck, and the bottom ends of the guide pipes are communicated with the methanol cabin top plate. The two ends of the guide pipe are fixedly connected with the exposed deck and the methanol cabin top plate in a sealed mode respectively, and the guide pipe comprises a deep well delivery pump guide pipe, a liquid level sensor guide pipe and a pressure sensor guide pipe which are matched with equipment accessories. By means of the arrangement structure, the safety during accessory equipment maintenance can be remarkably improved; by means of the original guide pipe type sealing structure and the extension design of the temperature sensor protection pipe, the equipment cable is completely laid in the guide pipe and the protection pipe and does not need to directly penetrate through the wall of the methanol isolation void cabin, and the risk of water tightness and air tightness failure caused by cable penetration in a traditional scheme is completely eradicated.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to an arrangement structure of methanol tank equipment accessories of a methanol dual-fuel VLOC ship. Background Art

[0002] To ensure safety during the design and construction of methanol dual-fuel VLOC vessels, a dedicated methanol isolation tank is typically designed around the methanol tank. Several key equipment and accessories, such as a methanol deep-well transfer pump, radar level sensor, pressure sensor, and temperature sensor, need to be installed on top of the methanol tank. In existing technology, these devices and accessories are typically installed directly inside the methanol isolation tank. However, this arrangement presents significant drawbacks and issues:

[0003] 1. Difficulty Ensuring Watertightness and Airtightness: Methanol isolation tanks are designed to be watertight and airtight. Cables required for equipment accessories must enter and exit the bulkhead through the isolation tank, significantly increasing the difficulty of maintaining the tank's watertightness and airtightness. To meet these sealing requirements, special and expensive cable entry fittings must be installed, significantly increasing ship construction costs.

[0004] 2. Difficult Maintenance and Safety Risks: These equipment accessories require regular maintenance and servicing during daily operations. The isolation chamber is typically very small, with personnel entering and exiting only through limited access doors, making operation extremely inconvenient. More importantly, air circulation within the isolation chamber is poor. Methanol, a volatile fuel, can emit trace amounts of vapor from equipment or interfaces, gradually accumulating within the sealed isolation chamber. This poses significant safety risks, such as potential poisoning and explosion, to personnel entering the chamber for maintenance.

[0005] Therefore, it is necessary to provide a layout structure of methanol tank equipment accessories for a methanol dual-fuel VLOC ship to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to address the deficiencies in the prior art and provide a layout structure for methanol tank equipment accessories of a methanol dual-fuel VLOC ship, which can effectively solve the problems of high cost, inconvenient maintenance and potential safety hazards existing in the prior art.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A methanol dual-fuel VLOC ship methanol tank equipment accessory arrangement structure includes an open deck, an isolation void tank, and a methanol tank. A plurality of conduits are arranged in the isolation void tank between the methanol tank top plate and the open deck. The top ends of the conduits are connected to the open deck, and the bottom ends of the conduits are connected to the methanol tank top plate. The two ends of the conduits are respectively sealed and fixedly connected to the open deck and the methanol tank top plate. The conduits include a deep well delivery pump conduit, a liquid level sensor conduit, and a pressure sensor conduit adapted for the equipment accessories.

[0009] Preferably, a methanol deep well delivery pump is installed in the deep well delivery pump conduit. The methanol deep well delivery pump includes a pump body and a pump pipe. The pump body is arranged at the top of the deep well delivery pump conduit and extends above the open deck. Parts that require regular maintenance are installed on the pump body. A pump pipe is provided below the pump body. The pump pipe is arranged along the deep well delivery pump conduit and extends from the bottom end of the deep well delivery pump conduit into the methanol cabin. The suction end of the methanol deep well delivery pump extends to the bottom of the methanol cabin. A first protective cover is provided above the pump body.

[0010] Preferably, a radar liquid level sensor is installed above the liquid level sensor conduit, a transmitting device of the radar liquid level sensor is installed on the open deck, the diameter of the liquid level sensor conduit is adapted to the transmission trajectory of the radar wave, and a second protective cover is provided above the radar liquid level sensor.

[0011] Preferably, the pressure sensor conduit includes a flange end at the top, the flange end extends above the open deck, the pressure sensor is docked and installed with the flange end, and a third protective cover is provided above the pressure sensor.

[0012] Preferably, the equipment accessories include a temperature sensor, the body of the temperature sensor is connected and fixed to the open deck, a protective tube is provided under the body, the protective tube passes through the isolation cabin and extends into the methanol cabin, the protective tube is sealed and fixed to the top plate of the methanol cabin, and a fourth protective cover is provided above the body.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. Significantly Improved Operational Safety: By extending the operating terminals of the methanol deep-well pump's components requiring regular maintenance, as well as the radar level sensor, pressure sensor, and temperature sensor, to the open deck, operators can perform routine maintenance without entering the sealed methanol isolation tank. This fundamentally eliminates the risk of exposure to accumulated methanol vapor in a small, confined space, effectively preventing major safety hazards such as poisoning and explosion.

[0015] 2. Completely solve the cabin sealing problem: The unique conduit-type sealing structure and extended design of the temperature sensor protection tube allow the equipment cables to be laid entirely within the conduit and protection tube, eliminating the need to directly penetrate the methanol isolation bulkhead. This eliminates the risk of watertightness and airtightness failure caused by cable penetration in traditional solutions.

[0016] 3. Optimize maintenance efficiency and operability: The operating end of accessory equipment on the open deck has an open operating space and a good ventilation environment, allowing maintenance personnel to perform maintenance quickly and conveniently without having to enter and exit the isolation cabin through narrow doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the arrangement of the methanol tank equipment accessories of the present invention;

[0018] Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle;

[0019] Among them, 1-open deck, 2-isolated empty compartment, 3-methanol compartment, 4-deep well pump conduit, 5-liquid level sensor conduit, 6-pressure sensor conduit, 7-methanol deep well pump, 701-pump body, 702-pump pipe, 8-first protective cover, 9-radar level sensor, 10-second protective cover, 11-pressure sensor, 12-third protective cover, 13-temperature sensor, 1301-body, 1302-protective tube, 14-fourth protective cover DETAILED DESCRIPTION

[0020] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0021] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0022] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", and "top" are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0023] like Figures 1 to 2As shown, a layout structure of equipment accessories of a methanol tank of a methanol dual-fuel VLOC ship includes an open deck 1, an isolation void tank 2 and a methanol tank 3. The isolation void tank is arranged between the methanol tank top plate and the open deck. Several conduits are installed in the isolation void tank. The top ends of the conduits are connected to the open deck and are sealed and welded to the open deck. The bottom ends of the conduits are connected to the methanol tank top plate and are sealed and welded to the methanol tank top plate. The conduits include a deep well transfer pump conduit 4, a liquid level sensor conduit 5 and a pressure sensor conduit 6 adapted to the equipment accessories. A methanol deep well transfer pump 7 is correspondingly installed in the deep well transfer pump conduit. The methanol deep well transfer pump includes a pump body 701 and a pump pipe 702. The pump body is installed at the top end of the deep well transfer pump conduit and extends above the open deck. Parts for regular maintenance are installed on the pump body. A pump pipe is provided below the pump body. The pump pipe is arranged along the deep well transfer pump conduit and extends from the bottom end of the deep well transfer pump conduit into the methanol tank. The suction end of the methanol deep well transfer pump extends to the bottom of the methanol tank through the pump pipe. A first protective cover 8 is installed above the pump body. The transmitting device of the radar liquid level sensor 9 is installed in the open deck. On the deck, the radar transmitting end of the radar level sensor is located directly above the level sensor conduit. The diameter of the level sensor conduit is adapted to the emission trajectory of the radar wave. A second protective cover 10 is installed above the radar level sensor. The pressure sensor conduit includes a flange end at the top, which extends above the open deck. The pressure sensor 11 is docked with the flange end and installed above the pressure sensor. A third protective cover 12 is installed above the pressure sensor. The equipment accessories also include a temperature sensor 13. The body 1301 of the temperature sensor is connected and fixed to the open deck. A protective tube 1302 is provided below the body. The protective tube passes through the isolation tank and extends into the methanol tank. The protective tube is sealed and fixed to the top plate of the methanol tank. A fourth protective cover 14 is installed above the body. When the pump body, radar level sensor, pressure sensor and temperature sensor of the methanol deep well transfer pump are all installed on the open deck, due to long-term exposure to the open air environment, in order to prevent the equipment accessories from being damaged by rain and sea water, corresponding first, second, third and fourth protective covers need to be installed to protect the equipment accessories.

[0024] The principle of the methanol tank equipment accessory arrangement structure of a methanol dual-fuel VLOC ship: The present invention moves the operating end of the accessory equipment, which was originally required to be placed in the isolated air compartment, to the open deck through a conduit structure. Combined with sealing welding technology and protective devices, the maintenance and servicing of the accessory equipment are arranged to be carried out on the open deck, avoiding workers from entering the relatively closed isolated air compartment and being exposed to methanol vapor, thereby creating safety hazards. The two ends of the conduit are respectively sealed and welded to the open deck and the top plate of the methanol tank to form an independent airtight passage, thereby preventing methanol from leaking into the isolated air compartment. Customized protective covers are added to the top of the accessory equipment installed on the open deck to resist the impact of rain and sea water.

[0025] A method for installing the methanol tank equipment accessory arrangement structure of a methanol dual-fuel VLOC ship:

[0026] 1. Installation of the methanol deep-well transfer pump: Drill a hole at a selected location on the methanol tank roof, seal-weld the bottom end of the large-diameter deep-well transfer pump conduit to the methanol tank roof, and pass the top end of the conduit through the isolation tank and seal-weld it to the opening on the open deck to ensure that the conduit is airtight as a whole. Insert the pump pipe of the methanol deep-well transfer pump from the top end of the conduit and extend it to the bottom of the methanol tank, so that the suction end of the methanol deep-well transfer pump is close to the bottom of the tank. Install the pump body on the top end of the conduit and extend it above the open deck. Install a first protective cover above the pump body, and seal and fix the edge of the cover to the open deck to prevent erosion of the pump body by rain and seawater.

[0027] 2. Installation of the radar level sensor: Calculate the required conduit diameter according to the radar wave emission trajectory to ensure that the beam penetrates without interference. Seal and weld the bottom end of the level sensor conduit to the methanol tank roof, and the top end to the open deck. Install the radar transmitter directly above the conduit on the open deck, with the transmitting end aligned with the central axis of the conduit. Install a second protective cover above the radar level sensor, and seal and fix the edge of the cover to the open deck to prevent rain and seawater from eroding the pump body.

[0028] 3. Installation of the pressure sensor: A flange is pre-welded on the top of the pressure sensor conduit to form a flange end. After the conduit passes through the isolation tank, the bottom end of the pressure sensor conduit is sealed and welded to the top plate of the methanol tank. The flange end protrudes from the open deck. The pressure sensor is directly connected to the flange end of the pressure sensor conduit through bolts and installed. A third protective cover is installed above the pressure sensor. The edge of the cover is sealed and fixed to the open deck to prevent rain and sea water from eroding the pump body.

[0029] 4. Installation of temperature sensor: The bottom end of the temperature sensor protection tube passes through the methanol tank top plate and is sealed and welded to the methanol tank top plate. The temperature sensor body extends above the open deck and is fixed to the open deck. A fourth protective cover is installed above the temperature sensor. The edge of the cover is sealed and fixed to the open deck to prevent rain and sea water from eroding the pump body.

[0030] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the inventive concept described herein by the teachings above or by techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. A methanol dual-fuel VLOC ship methanol tank equipment and accessories layout structure, including an open deck, a cofferdam and a methanol tank, characterized by: A plurality of conduits are arranged in the isolation space between the methanol tank top plate and the open deck. The top ends of the conduits are connected to the open deck, and the bottom ends of the conduits are connected to the methanol tank top plate. The two ends of the conduits are respectively sealed and fixed to the open deck and the methanol tank top plate. The conduits include deep well delivery pump conduits, liquid level sensor conduits and pressure sensor conduits adapted to equipment accessories.

2. The arrangement structure of methanol tank equipment accessories for a methanol dual-fuel VLOC ship according to claim 1, characterized in that: A methanol deep well delivery pump is installed in the deep well delivery pump conduit. The methanol deep well delivery pump includes a pump body and a pump pipe. The pump body is arranged at the top of the deep well delivery pump conduit and extends above the open deck. Parts that require regular maintenance are installed on the pump body. A pump pipe is provided below the pump body. The pump pipe is arranged along the deep well delivery pump conduit and extends from the bottom end of the deep well delivery pump conduit into the methanol cabin. The suction end of the methanol deep well delivery pump extends to the bottom of the methanol cabin. A first protective cover is provided above the pump body.

3. The arrangement structure of methanol tank equipment accessories for a methanol dual-fuel VLOC ship according to claim 1, characterized in that: A radar liquid level sensor is installed above the liquid level sensor conduit. The transmitting device of the radar liquid level sensor is installed on the open deck. The diameter of the liquid level sensor conduit is adapted to the transmitting trajectory of the radar wave. A second protective cover is provided above the radar liquid level sensor.

4. The arrangement structure of methanol tank equipment accessories for a methanol dual-fuel VLOC ship according to claim 1, characterized in that: The pressure sensor conduit includes a flange end located at the top, the flange end extends above the open deck, the pressure sensor is docked and installed with the flange end, and a third protective cover is provided above the pressure sensor.

5. The arrangement structure of equipment accessories for methanol tank of a methanol dual-fuel VLOC ship according to claim 1, characterized in that: The equipment accessories include a temperature sensor, the body of the temperature sensor is connected and fixed to the open deck, a protective tube is provided under the body, the protective tube passes through the isolation cabin and extends into the methanol cabin, the protective tube is sealed and fixed to the top plate of the methanol cabin, and a fourth protective cover is provided above the body.

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