KR-20260065635-A - Inner tank mounting system and inner tank mounting method for double tank

KR20260065635AKR 20260065635 AKR20260065635 AKR 20260065635AKR-20260065635-A

Abstract

A double tank including an inner tank and an outer tank; a rail installed on the inner lower side of the outer tank; and a trolley slidable on the rail, wherein the inner tank is supported on the trolley and moves and is mounted on the inner side of the outer tank along the rail. An inner tank mounting system for a double tank and a method for mounting an inner tank using the same are disclosed.

Inventors

전준환
박태윤
이양헌
방창선
전상익
조태민
황재식

Assignees

삼성중공업 주식회사

Dates

Publication Date: 20260511
Application Date: 20241030

Claims (15)

A double tank including an inner tank and an outer tank; A rail installed on the inner lower side of the above outer casing; and It includes a bogie capable of sliding on the above rail, The above inner tank is supported on the above bogie and is characterized by moving and being mounted on the inner side of the above outer tank along the rail. Internal tank mounting system for double tanks.
In paragraph 1, The above bogies are provided in pairs to support the front and rear ends, respectively, along the longitudinal direction of the above inner tank, Internal tank mounting system for double tanks.
In paragraph 1, The above-mentioned bogie is, A frame part having wheels mounted at the bottom so as to be movable on the above rail; and A plurality of hydraulic jacks installed on the upper part of the frame portion to support the inner tank, Internal tank mounting system for double tanks.
In paragraph 3, The above-mentioned frame portion has a rectangular frame shape, and is provided with a structure in which the width-direction frame is detachable. Internal tank mounting system for double tanks.
In paragraph 3, A stand is provided at the bottom of the above inner tank so as to be supported by the above hydraulic jack, Internal tank mounting system for double tanks.
In paragraph 3, It further includes a plurality of support members that support the space between the inner tank and the outer tank, and An outer tank side guide is provided on the lower inner surface of the above outer tank to guide the installation of the support member and fix its position. Internal tank mounting system for double tanks.
In paragraph 6, At the bottom of the above-mentioned inner tank, an inner tank-side guide is provided by inserting the upper end of at least one of the plurality of support members to restrict the movement of the inner tank along the longitudinal direction of the tank. Internal tank mounting system for double tanks.
A method for mounting the inner tank of a double tank including an inner tank and an outer tank, A step of lifting the inner tank and initiating insertion into the inner side of the outer tank; A step of moving the inner tank into the interior of the outer tank using a rail installed inside the outer tank; A step of completing the movement of the inner tank and installing a support member inside the outer tank; and A step comprising lowering the above inner tube and placing it on the above support member, Method for mounting an inner tank for a double tank.
In paragraph 8, In the step of moving the inner tank into the interior of the outer tank, the inner tank is supported and moved on a trolley capable of sliding movement on the rail, Method for mounting an inner tank for a double tank.
In Paragraph 9, In the step of moving the inner tank into the interior of the outer tank, the inner tank is supported in a lifted state by a hydraulic jack installed on the trolley, such that the center of the inner tank is positioned above the center of the outer tank. Method for mounting an inner tank for a double tank.
In Paragraph 10, In the step of installing the support member, the support member is guided for installation and its position is fixed by an outer tank-side guide provided on the lower inner circumference of the outer tank. Method for mounting an inner tank for a double tank.
In Paragraph 11, In the above-mentioned seating step, the inner tank is lowered by releasing the hydraulic pressure of the hydraulic jack, Method for mounting an inner tank for a double tank.
In Paragraph 12, In the above-mentioned settling step, when the inner tank is lowered, the inner tank side guide provided at the bottom of the inner tank is inserted into the upper part of any one of the support members to guide the position of the inner tank along the longitudinal direction of the tank. Method for mounting an inner tank for a double tank.
In Paragraph 9, A method further comprising the step of removing the trolley from the interior of the tank after the installation of the above-mentioned inner tank is completed. Method for mounting an inner tank for a double tank.
In Paragraph 14, The above bogie includes a frame portion with wheels mounted at the bottom so as to be movable on the rail, and In the step of removing the above bogie, the bogie is removed with the width-direction frame separated from the frame portion to prevent interference with the support member. Method for mounting an inner tank for a double tank.

Description

Inner tank mounting system and inner tank mounting method for double tank The present invention relates to an inner tank mounting system and an inner tank mounting method for a double tank, and more specifically, to a system and method for efficiently mounting an inner tank on the inner side of an outer tank in a double tank having a double structure. With the rapid industrialization and population growth leading to a surge in energy demand, fossil fuels are being depleted, creating a need for solutions to environmental issues such as global warming and the supply and demand of alternative energy. To address these complex global energy challenges, hydrogen has recently been garnering attention as a global alternative energy source. Hydrogen is an energy source with the highest energy density per unit mass, existing in abundance on Earth after carbon and nitrogen. It is an eco-friendly energy source that produces only trace amounts of nitrogen oxides during combustion and emits no other harmful substances. Furthermore, since hydrogen can be produced using the abundant water available on Earth and is recycled back into water after use, it can be considered an optimal alternative energy source free from concerns regarding depletion. The most critical challenge in utilizing hydrogen as an energy source is finding a method to store it effectively. Known methods for storing hydrogen include compressing hydrogen gas, liquefying it, and using hydrogen storage alloys. As the hydrogen market grows and large-scale transportation of hydrogen by ship is expected to become active, the method of storing hydrogen by liquefying it, utilizing its characteristic of having a very low density per unit volume, is recognized as a suitable technology for large-scale storage and long-distance transportation. Various technologies can be applied for the storage of liquid hydrogen ( LH2 ). Considering the extremely low storage temperature environment of liquid hydrogen, which has a boiling point of -253°C, tanks for storing liquid hydrogen require strict design conditions. Liquid hydrogen storage tanks must be mechanically robust to withstand cryogenic temperatures and must also be able to withstand shrinkage and expansion stresses due to temperature changes at cryogenic temperatures. Meanwhile, storage technologies using membrane-type tanks and independent-type tanks are known as technologies for storing cryogenic fluids. Independent-type tanks can be further classified into Type C tanks, which are pressure tanks, and Type A and Type B tanks, which are atmospheric tanks. Among them, Type C tanks are typically manufactured in a spherical or cylindrical shape to ensure that the pressure acts equally across the tank's storage cross-sectional area; this structure offers high responsiveness to internal pressure and is widely used for purposes such as onshore storage and land and sea transportation. Conventional Type C tanks are designed to satisfy temperature conditions for storing cryogenic liquid cargoes (LNG, LPG, etc.) by applying insulating materials, such as polyurethane foam (PUF), to the outer surface of the tank steel where the cryogenic fluid is stored. However, since liquefied hydrogen requires extreme temperature conditions 90°C lower than LNG (Liquefied Natural Gas), applying conventional polyurethane foam insulation inevitably leads to an inefficient increase in the thickness of the insulation layer, which inevitably results in space constraints when installed on ships. To compensate for these drawbacks, a Type C tank for liquid hydrogen storage employing a double vacuum insulation system has been introduced. This Type C tank, featuring a double vacuum structure, comprises an inner tank storing cryogenic fluid and an outer tank exposed to the outside air. By creating a vacuum in the space between the inner and outer tanks and additionally filling this space with powdered insulation to block the inflow of radiant heat, the total amount of external heat input is reduced. Conventional Type C tanks having such a double vacuum structure require significantly advanced technology in terms of manufacturing because one tank (inner tank) must be mounted inside another tank (outer tank). FIG. 1 is a drawing showing a conventional inner tank mounting system for a double tank. Referring to FIG. 1, in order to manufacture a double-structured tank, the outer tank is manufactured by dividing it into an upper outer tank (not shown) and a lower outer tank (2), and the inner tank (1) is mounted on the upper side of the lower outer tank (2), which is supported by a saddle (4), using a crane. And, although not shown in the drawing, after the inner tank (1) was completed, the upper outer tank (not shown) was positioned on the lower outer tank (2) using a crane and joined by welding to form a double tank. At this time, the inner tank (1) is supported by a support member (3) installed on the inner side of the lower outer tank (2), and thereby the i