KR-20260067489-A - Pump tower of liquefied gas cargo hold

KR20260067489AKR 20260067489 AKR20260067489 AKR 20260067489AKR-20260067489-A

Abstract

The pump tower of the liquefied gas cargo tank is opened. The pump tower of the liquefied gas cargo tank according to the present embodiment is a pump tower of a liquefied gas storage tank installed inside the liquefied gas storage tank to supply liquefied gas to the inside of the liquefied gas storage tank or to discharge liquefied gas to the outside of the liquefied gas storage tank, and may include: a filling pipe for introducing liquefied gas into the inside of the liquefied gas storage tank from the outside; a discharge pipe for discharging liquefied gas inside the liquefied gas storage tank to the outside; a pump connected to the discharge pipe to supply liquefied gas inside the liquefied gas storage tank to the discharge pipe and arranged in a straight line with the discharge pipe; and a corrugated pipe connecting the discharge pipe and the pump.

Inventors

황정오
이군희

Assignees

삼성중공업 주식회사

Dates

Publication Date: 20260513
Application Date: 20241105

Claims (8)

A pump tower for a liquefied gas storage tank, installed inside the liquefied gas storage tank to supply liquefied gas to the inside of the liquefied gas storage tank or to discharge liquefied gas to the outside of the liquefied gas storage tank, A filling pipe for introducing liquefied gas from the outside into the liquefied gas storage tank; A discharge pipe for discharging liquefied gas inside the above-mentioned liquefied gas storage tank to the outside; A pump connected to the discharge pipe, which supplies liquefied gas inside the liquefied gas storage tank to the discharge pipe and is positioned in a straight line with the discharge pipe; and A pump tower of a liquefied gas cargo tank including a corrugated pipe connecting the discharge pipe and the pump.
In paragraph 1, A pump tower of a liquefied gas cargo tank, comprising a cover that encloses the corrugated pipe, with one side fixed to the pump and the other side fixed to the discharge pipe.
In paragraph 2, A pump tower of a liquefied gas cargo tank in which the inner diameter of the above cover is larger than the outer diameter of the above corrugated pipe.
In paragraph 2, A pump tower of a liquefied gas cargo tank in which the outer diameter of the above cover is larger than the outer diameter of the above discharge pipe.
In paragraph 2, The above corrugated tube Pump tower of a liquefied gas cargo tank flowing inside the above cover.
In paragraph 1, The above discharge pipe is Pump towers of a liquefied gas cargo tank provided in pairs and spaced apart from each other.
In paragraph 1, The above filling pipe is A pump tower of a liquefied gas cargo tank that serves as the main support for the load acting on the above pump tower.
In paragraph 1, A pump tower of a liquefied gas cargo tank comprising a support member that supports the pump, with one end fixed to the charging pipe and the pump installed on the other end.

Description

Pump tower of liquefied gas cargo hold The present invention relates to a pump tower for a liquefied gas cargo tank, wherein the pump can be installed in a straight line with the discharge pipe to increase the flow rate and the load applied to the pump connection part can be reduced to ensure durability. Natural gas is transported in a gaseous state through onshore or offshore gas pipelines, or transported to distant consumption sites in a liquefied state stored on liquefied gas carriers. For example, liquefied gases such as LNG (Liquefied Natural Gas) or LPG (Liquefied Petroleum Gas) are obtained by cooling natural gas or oil gas to cryogenic temperatures (approximately -163°C in the case of LNG). Since their volume is significantly reduced compared to natural gas in its gaseous state, they are highly suitable for long-distance transportation by sea. Structures for transporting or storing liquefied gas, such as LNG carriers for transporting LNG and sailing to an onshore location to unload LNG, include storage tanks (commonly referred to as ‘cargo tanks’) capable of withstanding the cryogenic temperatures of the liquefied gas. Liquefied gas storage tanks can be classified into independent tank type and membrane type depending on whether the load of the cargo acts directly on the insulation material. Inside the liquefied gas storage tank, a pump tower is installed, which houses pipes for loading liquefied gas into the tank or unloading liquefied gas out of the tank. Typically, the pump tower is a structure with a height of around 30 meters and is installed near the bulkhead at the stern. These pump towers are positioned in the height direction of the liquefied gas storage tank, and in order to cope with thermal deformation caused by cryogenic liquefied gas, the top of the pump tower is fixed to the liquid dome formed on the top of the storage tank and is not fixed to the bottom of the storage tank. Meanwhile, the pump tower is partially submerged in liquefied gas inside the liquefied gas storage tank, and during the transportation of liquefied gas, the movement of the ship or waves can cause the liquefied gas to flow inside the storage tank. When liquefied gas flow occurs, the pump tower installed inside the liquefied gas storage tank receives the load caused by the flow directly, causing it to sway unstably. This results in structural defects, which can ultimately hinder the stable transportation of liquefied gas. In addition, the substructure must be designed so that the load generated at the pump connection point connecting the pump and piping during ship operation does not exceed the pump's allowable load. In conventional pump towers, the pump is installed on a base plate fixed to the charging and discharging pipes, and the design ensures that no load is applied to the pump connection point due to the weight of the base plate and the pump itself, as well as acceleration generated during ship operation. In this case, the pump is designed to be spaced apart from the discharging pipe but positioned parallel to it to prevent load from being applied to the pump connection point. For example, the pump is installed on the base plate between the charging and discharging pipes. However, in this structure, there was a problem in that the flow rate of the liquefied gas discharged by the pump was small. FIG. 1 is a perspective view showing a pump tower of a liquefied gas cargo tank according to one embodiment of the present invention. FIG. 2 is a perspective view showing a pump tower of a liquefied gas cargo tank according to one embodiment of the present invention. FIG. 3 is a perspective view showing a pump tower of a liquefied gas cargo tank according to one embodiment of the present invention. The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. The following embodiments are presented to sufficiently convey the concept of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit the illustration of parts unrelated to the description and may slightly exaggerate the size of components to aid understanding. FIG. 1 is a perspective view showing a pump tower (10) of a liquefied gas cargo tank according to one embodiment of the present invention, showing that a pump (300) and a discharge pipe (200) are connected through a corrugated pipe (400). FIG. 2 is a perspective view showing a pump tower (10) of a liquefied gas cargo tank according to one embodiment of the present invention, showing that a cover (500) is installed on the corrugated pipe (400) side. FIG. 3 is a perspective view showing a pump tower (10) of a liquefied gas cargo tank according to one embodiment of the present invention, showing a cover (500) and a corrugated pipe (400) disposed