A method for installing a liquid dome insulation tank of a containment system of an LNG ship

Abstract

The application discloses a kind of installation methods of LNG ship containment system liquid dome insulation box, and the method specifically includes the following steps: S1, insulation box is connected with the bottom of liquid dome section, and insulation box is connected with the top of liquid dome section by hand-operated hoist and long screw rod;S2, insulation box is attached to the bottom of liquid dome section by hand-operated hoist, and liquid dome section and insulation box are hoisted together to the installation position of upper portion of maintenance system;S3, when liquid dome section hoisting is completed, insulation box is separated from liquid dome section by hand-operated hoist, insulation box resin strip is arranged, and insulation box is reconnected with the bottom of liquid dome section, and the installation of insulation box is completed.The application connects insulation box with liquid dome section by screw rod, and separates and connects insulation box with liquid dome section by hand-operated hoist, avoids open fire and high temperature generated by liquid dome section welding work to damage liquid dome insulation box, and improves the quality and safety during installation of insulation box.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of shipbuilding, and particularly relates to a LNG ship enclosure system liquid dome insulation box installation method. BACKGROUND

[0002] The liquid dome is one of special areas of the thin film type enclosure system, and the cargo handling system passes through the area to connect the cargo hold with the outside for cargo injection or output. The liquid dome area is relatively independent, and the installation work at the position is carried out after the main installation work of the cargo hold enclosure system is basically completed. The enclosure system of the liquid dome area is mainly composed of the liquid dome insulation box and the evaz film, and the liquid dome insulation box is installed and fixed on the liquid dome section through special bolts. Due to the limitation of construction conditions, the liquid dome insulation box is hoisted before the liquid dome section, but the liquid dome insulation box can be finally installed on the liquid dome section only after the liquid dome section is completed and welded. SUMMARY

[0003] The application aims to overcome the deficiencies in the prior art, and provides a LNG ship enclosure system liquid dome insulation box installation method. The insulation box and the liquid dome section are connected through the screw rod, and the insulation box and the liquid dome section are separated and connected through the chain hoist, so that the damage of the liquid dome insulation box caused by the naked fire and high temperature generated in the liquid dome section welding work is avoided, and the quality and safety of the insulation box installation are improved.

[0004] In order to achieve the above-mentioned application purposes, the technical scheme provided by the application patent is as follows:

[0005] A LNG ship enclosure system liquid dome insulation box installation method, which specifically comprises the following steps:

[0006] S1, connecting the insulation box with the bottom of the liquid dome section, and connecting the insulation box with the top of the liquid dome section through the chain hoist and the long screw rod;

[0007] S2, tightly attaching the insulation box to the bottom of the liquid dome section through the chain hoist, and hoisting the liquid dome section and the insulation box to the installation position of the upper part of the maintenance system;

[0008] S3, separating the insulation box from the liquid dome section through the chain hoist after the liquid dome section is hoisted, arranging the insulation box resin strip, connecting the insulation box with the bottom of the liquid dome section again, and completing the installation of the insulation box.

[0009] Further, one end of the long screw rod is provided with external threads, the other end of the long screw rod is provided with a lifting ring, the long screw rod passes through the bottom of the liquid dome section and is threadedly connected with the insulation box at the end with external threads, and the other end of the long screw rod extends out of the bottom of the liquid dome section.

[0010] Further, the insulation box is connected with the liquid dome segmented bottom through a plurality of long screws, a plurality of lifting rings are arranged on the liquid dome segmented top, and the lifting rings arranged on the liquid dome segmented top correspond to the long screws arranged on the liquid dome segmented bottom one by one.

[0011] Further, a hand chain hoist is arranged on the lifting ring of the liquid dome segmented top, and the hand chain hoist connects the long screw with the liquid dome segmented top.

[0012] Further, after the liquid dome segmented hoisting is completed, the insulation box is lowered through the hand chain hoist, so that the upper end of the insulation box is separated from the liquid dome segmented bottom, the insulation box is adjusted to be in a horizontal state through the hand chain hoist, when the insulation box is separated from the liquid dome segmented, the liquid dome segmented is welded and fixed with the maintenance system, and the installation of the liquid dome segmented is completed.

[0013] Further, after the liquid dome segmented installation is completed, resin strips are arranged on the top end face of the insulation box, the resin strips are arranged on the top end face of the insulation box in a uniform manner, when the resin strips on the top of the insulation box are arranged, the insulation box is pulled up through the hand chain hoist, so that the upper end face of the insulation box is connected and fixed with the liquid dome segmented bottom through the resin strips, and meanwhile, the layer difference of the insulation layer between the insulation box and the liquid dome segmented bottom is controlled, until the insulation box is installed to a required position.

[0014] Based on the above technical scheme, the installation method of the LNG ship containment system liquid dome insulation box of the LNG ship containment system liquid dome insulation box has the following technical advantages after practical application:

[0015] 1. The installation method of the LNG ship containment system liquid dome insulation box of the LNG ship containment system liquid dome insulation box connects the insulation box with the liquid dome segmented through a screw, so that the insulation box and the liquid dome segmented are connected together, and are hoisted at the same time, and after hoisting, the liquid dome insulation box can be lowered through a hand chain hoist, so that the liquid dome insulation box is separated from the liquid dome segmented, the open fire and high temperature generated in the liquid dome segmented welding work are avoided, the liquid dome insulation box is damaged, after the liquid dome segmented welding is completed, the insulation box is pulled up to the position through the hand chain hoist, the installation of the liquid dome insulation box is completed, the construction conflict is avoided through the method, and the installation work of the liquid dome insulation box is efficiently completed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic view of the connection between the insulation box and the liquid dome segmented in the installation method of the LNG ship containment system liquid dome insulation box of the LNG ship containment system liquid dome insulation box.

[0017] Fig. 2 is a schematic view of the lowering of the insulation box in the installation method of the LNG ship containment system liquid dome insulation box of the LNG ship containment system liquid dome insulation box.

[0018] Fig. 3 is a resin strip arrangement diagram of the insulation box in the installation method of the LNG ship containment system liquid dome insulation box of the LNG ship containment system liquid dome insulation box. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described below in detail through specific examples 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 present application. 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 present application.

[0020] As Figs. 1-3 The present application belongs to a kind of LNG ship containment system liquid dome insulation box installation method, and the method specifically includes the following steps:

[0021] S1, insulation box 2 is connected with the bottom of liquid dome section 1, and insulation box 2 is connected with the top of liquid dome section 1 by hand-operated hoist 5 and long screw 3;

[0022] S2, insulation box 2 is tightly attached to the bottom of liquid dome section 1 by hand-operated hoist 5, and liquid dome section 1 and insulation box 2 are hoisted together to the installation position of the upper part of the maintenance system;

[0023] S3, when liquid dome section 1 is hoisted, insulation box 2 is separated from liquid dome section 1 by hand-operated hoist 5, the arrangement of insulation box 2 resin strip 6 is carried out, insulation box 2 is reconnected with the bottom of liquid dome section 1, and the installation of insulation box 2 is completed.

[0024] One end of the long screw 3 is provided with external threads, the other end of the long screw 3 is provided with a lifting ring 4, the long screw 3 is threaded at one end through the bottom of the liquid dome section 1 and is connected with the insulation box 2, and the other end of the long screw 3 extends out of the bottom of the liquid dome section 1.

[0025] The insulation box 2 is connected with the bottom of the liquid dome section 1 by a plurality of long screws 3, a plurality of lifting rings 4 are provided at the top of the liquid dome section 1, and the lifting rings 4 provided at the top of the liquid dome section 1 correspond one-to-one to the long screws 3 provided at the bottom of the liquid dome section 1.

[0026] The lifting ring 4 at the top of the liquid dome section 1 is provided with a hand-operated hoist 5, and the hand-operated hoist 5 connects the long screw 3 with the top of the liquid dome section 1.

[0027] After the liquid dome section 1 is hoisted, the insulation box 2 is lowered by the hand-operated hoist 5, so that the upper end of the insulation box 2 is separated from the bottom of the liquid dome section 1, the insulation box 2 is adjusted to be in a horizontal state by adjusting the hand-operated hoist 5, and after the insulation box 2 is separated from the liquid dome section 1, the liquid dome section 1 is welded and fixed with the maintenance system to complete the installation of the liquid dome section 1.

[0028] After the installation of the liquid dome segment 1 is completed, resin strips 6 are arranged on the top end face of the insulation box 2, and the resin strips 6 are arranged uniformly on the top end face of the insulation box 2; after the arrangement of the resin strips 6 on the top of the insulation box 2 is completed, the insulation box 2 is pulled up by the chain hoist 5, so that the upper end face of the insulation box 2 is connected and fixed with the bottom of the liquid dome segment 1 through the resin strips 6, and meanwhile, the layer difference between the insulation box 2 and the insulation layer of the bottom of the liquid dome segment 1 is controlled until the insulation box 2 is installed to the required position.

[0029] By using the screw rod to connect the insulation box 2 and the liquid dome segment 1 together, the insulation box 2 and the liquid dome segment 1 are hoisted at the same time, and after hoisting, the liquid dome insulation box 2 can be lowered by the chain hoist 5 to be separated from the liquid dome segment 1, so that the open fire and high temperature generated in the welding work of the liquid dome segment 1 do not cause damage to the liquid dome insulation box 2; after the welding of the liquid dome segment 1 is completed, the insulation box 2 is pulled up to the position by the chain hoist 5, and the installation of the insulation box 2 is completed; by this method, the construction conflict can be avoided, and the installation work of the insulation box 2 can be completed efficiently.

[0030] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that; the specific embodiments of the application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A method for installing the liquid dome insulation box of an LNG ship containment system, characterized in that, The method specifically includes the following steps: S1, connect the insulation box to the bottom of the liquid dome section, and connect the insulation box to the top of the liquid dome section using a hand chain hoist and a long screw. One end of the long screw is provided with an external thread, and the other end of the long screw is provided with a lifting ring. The threaded end of the long screw passes through the bottom of the liquid dome segment and is threadedly connected to the insulation box, while the other end of the long screw extends out of the bottom of the liquid dome segment. The insulating box is connected to the bottom of the liquid dome section by multiple long screws. Multiple lifting rings are set at the top of the liquid dome section, and the lifting rings set at the top of the liquid dome section correspond one-to-one with the long screws set at the bottom of the liquid dome section. A hand-operated hoist is installed on the lifting ring at the top of the liquid dome section, and the hand-operated hoist connects the long screw to the top of the liquid dome section. S2, use a hand chain hoist to press the insulation box tightly against the bottom of the liquid dome section, and then hoist the liquid dome section and the insulation box together to the installation position on the upper part of the enclosure system; S3. After the liquid dome section is hoisted, the insulation box is separated from the liquid dome section by a hand-operated hoist, the resin strips of the insulation box are arranged, and the insulation box is reconnected to the bottom of the liquid dome section to complete the installation of the insulation box.

2. The installation method of the liquid dome insulation box of an LNG ship containment system according to claim 1, characterized in that, After the liquid dome section is hoisted, the insulation box is lowered using a hand-operated hoist to separate the upper part of the insulation box from the bottom of the liquid dome section. The insulation box is then adjusted to be horizontal. Once the insulation box is separated from the liquid dome section, the liquid dome section is welded and fixed to the enclosure system to complete the installation of the liquid dome section.

3. The installation method of the liquid dome insulation box of an LNG ship containment system according to claim 2, characterized in that, After the liquid dome section is installed, resin strips are arranged on the top end face of the insulation box. The resin strips are evenly distributed on the top end face of the insulation box. After the resin strips on the top of the insulation box are arranged, the insulation box is lifted by a hand chain hoist so that the upper end face of the insulation box is connected and fixed to the bottom of the liquid dome section through the resin strips. At the same time, the layer difference between the insulation box and the bottom insulation layer of the liquid dome section is controlled until the insulation box is installed in the required position.

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