Method for installing liquid dome insulation box of LNG ship containment system

Abstract

The invention discloses a mounting method for a liquid dome insulation box of an LNG ship containment system, and the method specifically comprises the following steps: S1, connecting the insulation box with the bottom of a liquid dome segment, and connecting the insulation box with the top of the liquid dome segment through a chain block and a long screw rod; s2, the insulation box is tightly attached to the bottom of the liquid dome section through a chain block, and the liquid dome section and the insulation box are hoisted to the installation position of the upper portion of the maintenance system together; and S3, after hoisting of the liquid dome segments is completed, the insulation box and the liquid dome segments are separated through a chain block, resin strips of the insulation box are arranged, the insulation box is connected with the bottoms of the liquid dome segments again, and installation of the insulation box is completed. According to the invention, the insulation box and the liquid dome segment are connected through the screw rod, and the separation and connection of the insulation box and the liquid dome segment are realized through the chain block, so that the liquid dome insulation box is prevented from being damaged by open fire and high temperature generated by the welding work of the liquid dome segment, and the quality and safety of the insulation box during installation are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ship construction, and in particular relates to a method for installing a liquid dome insulation box of a containment system of an LNG ship. Background Art

[0002] The liquid dome is one of the special areas of the membrane containment system. The cargo handling system passes through this area to connect the cargo hold with the outside to inject or output cargo. The liquid dome area is relatively independent. After the main installation of the cargo hold containment system is basically completed, the installation work at this location will be carried out. The containment system of the liquid dome area is mainly composed of a liquid dome insulation box and an invar membrane. The liquid dome insulation box is fixed to the liquid dome segment by special bolts. Due to the limitations of construction conditions, the liquid dome insulation box must be hoisted before the liquid dome segment, but the liquid dome insulation box can only be finally installed on the liquid dome segment after the installation and welding of the liquid dome segment is completed. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a method for installing a liquid dome insulation box of a containment system of an LNG ship. The present invention connects the insulation box and the liquid dome segment by screws and separates and connects the insulation box and the liquid dome segment by a hand winch, thereby avoiding damage to the liquid dome insulation box caused by open flames and high temperatures generated during the welding work of the liquid dome segment, thereby improving the quality and safety of the insulation box during installation.

[0004] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0005] A method for installing a liquid dome insulation box of an LNG ship containment system, the method specifically comprising the following steps:

[0006] S1, connect the insulation box to the bottom of the liquid dome segment, and connect the insulation box to the top of the liquid dome segment through a hand chain hoist and a long screw;

[0007] S2, use the hand chain hoist to press the insulation box against the bottom of the liquid dome segment, and hoist the liquid dome segment and the insulation box together to the installation position on the upper part of the maintenance system;

[0008] S3, when the liquid dome segment is hoisted, the insulation box is separated from the liquid dome segment by a hand winch, the resin strips of the insulation box are arranged, and the insulation box is reconnected to the bottom of the liquid dome segment to complete the installation of the insulation box.

[0009] Furthermore, 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 end of the long screw with the external thread passes through the bottom of the liquid dome segment and is threadedly connected to the insulation box, and the other end of the long screw extends out of the bottom of the liquid dome segment.

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

[0011] Furthermore, a hand chain hoist is provided on the lifting ring at the top of the liquid dome segment, and the hand chain hoist connects the long screw rod to the top of the liquid dome segment.

[0012] Furthermore, after the liquid dome segment is hoisted, the insulation box is lowered by a hand winch to separate the upper end of the insulation box from the bottom of the liquid dome segment, and the insulation box is kept in a horizontal state by adjusting the hand winch. When the insulation box is separated from the liquid dome segment, the liquid dome segment is welded and fixed to the maintenance system to complete the installation of the liquid dome segment.

[0013] Furthermore, after the installation of the liquid dome segment is completed, resin strips are arranged on the top end surface of the insulation box, and the resin strips are evenly arranged on the top end surface of the insulation box. When the resin strips on the top of the insulation box are arranged, the insulation box is pulled up by a hand winch so that the upper end surface of the insulation box and the bottom of the liquid dome segment are connected and fixed by the resin strips, and at the same time, the level difference between the insulation box and the insulation layer at the bottom of the liquid dome segment is controlled until the insulation box is installed to the required position.

[0014] Based on the above technical solution, the installation method of the liquid dome insulation box of the LNG ship containment system of the present invention has achieved the following technical advantages through practical application:

[0015] 1. The present invention discloses an installation method for a liquid dome insulation box of an LNG ship containment system. The insulation box is connected to a liquid dome segment by using a screw rod and hoisted at the same time. After the hoisting, the liquid dome insulation box can be lowered by a hand chain hoist to leave the liquid dome segment, thereby avoiding damage to the liquid dome insulation box caused by the open flame and high temperature generated by the liquid dome segment welding work. After the liquid dome segment welding is completed, the insulation box is pulled into place by a hand chain hoist to complete the installation of the liquid dome insulation box. The method can avoid construction conflicts and efficiently complete the installation of the liquid dome insulation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of segmented connection between an insulation box and a liquid dome in a method for installing a liquid dome insulation box of a LNG ship containment system.

[0017] Figure 2 The present invention is a schematic diagram of lowering an insulation box in a method for installing a liquid dome insulation box of a containment system of an LNG ship.

[0018] Figure 3 The present invention discloses a resin strip arrangement diagram on an insulation box in a method for installing a liquid dome insulation box of a containment system of an LNG ship. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0020] like Figure 1-3 The present invention relates to a method for installing a liquid dome insulation box of an LNG ship containment system, and the method specifically comprises the following steps:

[0021] S1, connect the insulation box 2 to the bottom of the liquid dome segment 1, and connect the insulation box 2 to the top of the liquid dome segment 1 through the hand chain hoist 5 and the long screw 3;

[0022] S2, use the hand chain hoist 5 to make the insulation box 2 close to the bottom of the liquid dome segment 1, and lift the liquid dome segment 1 and the insulation box 2 together to the installation position on the upper part of the maintenance system;

[0023] S3, when the liquid dome segment 1 is hoisted, the insulation box 2 is separated from the liquid dome segment 1 by the hand winch 5, the resin strips 6 of the insulation box 2 are arranged, and the insulation box 2 is reconnected to the bottom of the liquid dome segment 1 to complete the installation of the insulation box 2.

[0024] One end of the long screw 3 is provided with an external thread, and the other end of the long screw 3 is provided with a lifting ring 4. The end of the long screw 3 with the external thread passes through the bottom of the liquid dome segment 1 and is threadedly connected to the insulating box 2, and the other end of the long screw 3 extends out of the bottom of the liquid dome segment 1.

[0025] The insulating box 2 is connected to the bottom of the liquid dome segment 1 through a plurality of long screws 3, and a plurality of lifting rings 4 are arranged on the top of the liquid dome segment 1. The lifting rings 4 arranged on the top of the liquid dome segment 1 correspond one to one with the long screws 3 arranged on the bottom of the liquid dome segment 1.

[0026] A hand chain hoist 5 is provided on the lifting ring 4 at the top of the liquid dome segment 1 , and the hand chain hoist 5 connects the long screw 3 with the top of the liquid dome segment 1 .

[0027] After the liquid dome segment 1 is hoisted, the insulation box 2 is lowered by the hand chain hoist 5 to separate the upper end of the insulation box 2 from the bottom of the liquid dome segment 1. The insulation box 2 is placed in a horizontal state by adjusting the hand chain hoist 5. After the insulation box 2 is separated from the liquid dome segment 1, the liquid dome segment 1 is welded and fixed to the maintenance system to complete the installation of the liquid dome segment 1.

[0028] After the installation of the liquid dome segment 1 is completed, a resin strip 6 is arranged on the top end surface of the insulation box 2, and the resin strip 6 is evenly arranged on the top end surface of the insulation box 2. When the resin strip 6 on the top of the insulation box 2 is arranged, the insulation box 2 is pulled up by a hand winch 5, so that the upper end surface of the insulation box 2 and the bottom of the liquid dome segment 1 are connected and fixed through the resin strip 6, and at the same time, the layer difference between the insulation box 2 and the bottom insulation layer of the liquid dome segment 1 is controlled until the insulation box 2 is installed to the required position.

[0029] The insulating box 2 is connected to the liquid dome segment 1 by using a screw and hoisted at the same time. After hoisting, the liquid dome insulating box 2 can be lowered by a hand winch 5 to make it leave the liquid dome segment 1, so as to avoid damage to the liquid dome insulating box 2 caused by the open flame and high temperature generated by the welding work of the liquid dome segment 1. After the welding of the liquid dome segment 1 is completed, the insulating box 2 is pulled into place by the hand winch 5 to complete the installation of the insulating box 2. This method can avoid construction conflicts and efficiently complete the installation of the insulating box 2.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for installing a liquid dome insulation box of an LNG ship containment system, characterized in that: The method specifically comprises the following steps: S1, connect the insulation box to the bottom of the liquid dome segment, and connect the insulation box to the top of the liquid dome segment through a hand chain hoist and a long screw; S2, use the hand chain hoist to press the insulation box against the bottom of the liquid dome segment, and hoist the liquid dome segment and the insulation box together to the installation position on the upper part of the maintenance system; S3, when the liquid dome segment is hoisted, the insulation box is separated from the liquid dome segment by a hand winch, the resin strips of the insulation box are arranged, and the insulation box is reconnected to the bottom of the liquid dome segment to complete the installation of the insulation box.

2. The method for installing a liquid dome insulation box of an LNG ship containment system according to claim 1, characterized in that: 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 end of the long screw with the external thread passes through the bottom of the liquid dome segment and is threadedly connected to the insulation box, and the other end of the long screw extends out of the bottom of the liquid dome segment.

3. The method for installing a liquid dome insulation box of an LNG ship containment system according to claim 2, characterized in that: The insulating box is connected to the bottom of the liquid dome segment through a plurality of long screws, and a plurality of lifting rings are arranged on the top of the liquid dome segment, and the lifting rings arranged on the top of the liquid dome segment correspond one to one with the long screws arranged on the bottom of the liquid dome segment.

4. The method for installing a liquid dome insulation box of an LNG ship containment system according to claim 3, characterized in that: A hand chain hoist is arranged on the lifting ring at the top of the liquid dome segment, and the hand chain hoist connects the long screw rod with the top of the liquid dome segment.

5. The method for installing a liquid dome insulation box of an LNG ship containment system according to claim 4, characterized in that: After the liquid dome segment is hoisted, the insulation box is lowered by a hand winch to separate the upper end of the insulation box from the bottom of the liquid dome segment. The insulation box is kept in a horizontal state by adjusting the hand winch. When the insulation box is separated from the liquid dome segment, the liquid dome segment is welded and fixed to the maintenance system to complete the installation of the liquid dome segment.

6. The method for installing a liquid dome insulation box of a containment system of an LNG ship according to claim 5, characterized in that: After the installation of the liquid dome segment is completed, resin strips are arranged on the top end surface of the insulation box, and the resin strips are evenly distributed on the top end surface of the insulation box. When the resin strips on the top of the insulation box are arranged, the insulation box is pulled up by a hand winch so that the upper end surface of the insulation box and the bottom of the liquid dome segment are connected and fixed by the resin strips, and the layer difference between the insulation box and the insulation layer at the bottom of the liquid dome segment is controlled until the insulation box is installed to the required position.

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