Low-temperature cabin cover of marine liquefied gas B-type cabin and mounting method

Abstract

The invention discloses a marine liquefied gas B-type cabin low-temperature cabin cover, which comprises a cover plate body, a thermal insulation module and a gland, the cover plate body is installed at the top of a dome structure of a B-type cabin, the thermal insulation module is installed on the cover plate body, and the gland is installed above the thermal insulation module. The periphery of the cover plate body is fixedly connected with the top of a dome structure of the B-type cabin through bolts, the middle of the section of the heat insulation module is connected with the upper end face of the cover plate body, the two sides of the heat insulation module are connected with the upper end face of an insulation layer on the periphery of the B-type cabin, and the gland is connected with the cover plate body through bolts. The thermal insulation modules are arranged in a stepped mode, so that the hatch cover can be opened and closed conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of ship construction, and in particular relates to a low-temperature hatch cover for a marine liquefied gas B-type tank and an installation method thereof. Background Art

[0002] In recent years, the demand for cryogenic liquefied gas ships, especially liquefied natural gas LNG carriers, large ethane carriers VLEC and dual-fuel container ships is increasing. The cargo tanks of cryogenic liquefied gas ships need to be equipped with sufficient thermal insulation layers. Among them, the independent B-type tank type (internal pressure is generally less than 1 bar) of the International Maritime Organization (IMO) standard adopts the installation method of wrapping the thermal insulation layer of the cabin around the tank body, which is different from the internal installation method of the A-type tank and the membrane tank. Therefore, the cryogenic hatch cover and the thermal insulation layer need to be considered accordingly to ensure the tightness and thermal insulation of the hatch cover while being able to smoothly open and close the hatch cover. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a low-temperature hatch cover for a marine liquefied gas type B tank and an installation method. The present invention facilitates the opening and closing operations of the hatch cover by arranging the thermal insulation modules in a stepped manner.

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

[0005] A low-temperature hatch cover for a marine liquefied gas type B tank comprises a cover body, a heat-insulating module and a gland, wherein the cover body is mounted on the top of the dome structure of the type B tank, the heat-insulating module is mounted on the cover body, the gland is mounted above the heat-insulating module, the cover body is connected and fixed to the top of the dome structure of the type B tank by bolts on all sides, the middle of the heat-insulating module is connected to the upper end surface of the cover body, the two sides of the heat-insulating module are connected to the upper end surface of the peripheral insulation layer of the type B tank, and the gland is connected to the cover body by bolts.

[0006] Furthermore, a plurality of mounting holes are evenly arranged around the cover body, and a thickened frame is respectively arranged on the upper end surface and the lower end surface around the cover, and a plurality of through holes are arranged on the thickened frame, and the through holes on the thickened frame are correspondingly connected to the mounting holes; a plurality of eye plates are arranged on the end surface of the cover body.

[0007] Furthermore, the eye plate arranged on the upper end surface of the cover body is an embedded eye plate, and the upper end surface of the eye plate is flush with the end surface of the cover body; a surround is arranged on the inner side of the thickened frame of the lower end surface of the cover, a baffle is arranged on the inner side of the surround, and reinforcing ribs are arranged on the inner side of the baffle, and a sealing ring is arranged between the thickened frame at the lower end of the cover and the cover body.

[0008] Furthermore, the thermal insulation module is square as a whole, and the two sides of the lower end of the thermal insulation module are stepped. The width of the overlap between the thermal insulation module and the upper end surface of the peripheral insulation layer of the B-type cabin is greater than the width of the peripheral insulation layer of the B-type cabin, and the thickness of the thermal insulation module at the upper end of the peripheral insulation layer of the B-type cabin is greater than the width of the peripheral insulation layer of the B-type cabin.

[0009] Furthermore, the gland is in the shape of a groove as a whole, the groove of the gland is stuck in the upper end of the thermal insulation module, a plurality of eye plates are arranged on the gland, and the gland is connected and fixed to the cover body through long studs passing through the thermal insulation module.

[0010] Furthermore, a waterproof sealing ring is provided at the stud hole of the mounting stud on the gland.

[0011] A method for installing a low-temperature hatch cover of a marine liquefied gas B-type tank, the method specifically comprising the following steps:

[0012] S1. Prepare a low-temperature hatch cover for a marine liquefied gas type B tank, comprising a cover plate body, a heat-insulating module and a gland, wherein the cover plate body is mounted on the top of the dome structure of the type B tank, the heat-insulating module is mounted on the cover plate body, the gland is mounted above the heat-insulating module, the cover plate body is connected and fixed to the top of the dome structure of the type B tank by bolts on all sides, the middle of the heat-insulating module is connected to the upper end surface of the cover plate body, the two sides of the heat-insulating module are connected to the upper end surface of the peripheral insulation layer of the type B tank, and the gland is connected to the cover plate body by bolts;

[0013] S2, hoist the cover plate body to the top of the dome structure of the B-type cabin through the embedded eye plate on the cover plate body and fix it by bolt connection;

[0014] S3, install the thermal insulation module on the cover body, install the pressure cover on the cover body, connect and fix the pressure cover to the cover body through long bolts, and press the thermal insulation module on the cover body to complete the installation of the low-temperature cabin cover of type B cabin.

[0015] Based on the above technical solution, the present invention patented a low-temperature hatch cover for a marine liquefied gas type B tank and an installation method have achieved the following technical advantages through practical application:

[0016] 1. A low-temperature hatch cover for a marine liquefied gas type B tank of the present invention is convenient for opening and closing operations by arranging the heat insulation modules in a stepped manner.

[0017] 2. The low-temperature hatch cover of a type B marine liquefied gas tank of the present invention presses the heat insulation module and the cover body by means of a pressure cover to form a continuous and uninterrupted heat insulation layer, thereby improving the insulation and heat preservation performance of the type B tank low-temperature hatch cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a top view of a cover plate body in a low-temperature hatch cover of a marine liquefied gas B-type tank.

[0019] Figure 2 The invention is a low-temperature hatch cover of a marine liquefied gas B-type tank. Figure 1 AA schematic diagram.

[0020] Figure 3 The present invention is a side sectional view of a hatch cover of a low-temperature hatch cover of a marine liquefied gas B-type tank. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1-3 The present invention relates to a low-temperature hatch cover for a marine liquefied gas type B tank, comprising a cover body 1, a thermal insulation module 8 and a pressure cover 9, wherein the cover body 1 is installed on the top of the dome structure of the type B tank, the thermal insulation module 8 is installed on the cover body 1, and the pressure cover 9 is installed above the thermal insulation module 8. The cover body 1 is connected and fixed to the top of the dome structure of the type B tank by bolts on all sides, the middle part of the thermal insulation module 8 is connected to the upper end surface of the cover body 1, and the two sides of the thermal insulation module are connected to the upper end surface of the peripheral insulation layer of the type B tank, and the pressure cover 9 is connected to the cover body 1 by bolts.

[0023] The cover body 1 is evenly provided with a plurality of mounting holes around it, and the upper and lower end surfaces around it are respectively provided with thickened frames 11, and the thickened frames 11 are provided with a plurality of through holes, and the through holes on the thickened frames 11 are correspondingly connected with the mounting holes; the end surface of the cover body 1 is provided with a plurality of eye plates 7.

[0024] The eye plate 7 arranged on the upper end surface of the cover body 1 is an embedded eye plate 7, and the upper end surface of the eye plate 7 is flush with the end surface of the cover body 1; a surrounding plate 2 is arranged on the inner side of the thickened frame 11 of the lower end surface of the cover, a baffle 4 is arranged on the inner side of the surrounding plate 2, and a reinforcing rib 3 is arranged on the inner side of the baffle 4, and a sealing ring is arranged between the thickened frame 11 at the lower end of the cover and the cover body 1; a plurality of bolt holes are also arranged on the end surface of the cover body 1, which correspond one by one to the bolt holes on the pressure cover 9.

[0025] The thermal insulation module 8 is square in shape as a whole, and the two sides of the lower end of the thermal insulation module 8 are stepped. The overlap width of the thermal insulation module 8 and the upper end surface of the peripheral insulation layer of the B-type cabin is greater than the width of the peripheral insulation layer of the B-type cabin, and the thickness of the thermal insulation module 8 at the upper end of the peripheral insulation layer of the B-type cabin is greater than the width of the peripheral insulation layer of the B-type cabin. The stepped arrangement of the thermal insulation module 8 facilitates the opening and closing operations of the hatch cover.

[0026] The pressure cover 9 is in the shape of a groove as a whole, and the groove of the pressure cover 9 is stuck in the upper end of the thermal insulation module 8. A plurality of eye plates 7 are arranged on the pressure cover 9. The pressure cover 9 is connected and fixed to the cover body 1 through long studs passing through the thermal insulation module 8. The thermal insulation module 8 and the cover body 1 are pressed tightly by the pressure cover 9 to form a continuous and uninterrupted insulation layer, thereby improving the insulation and thermal insulation performance of the low-temperature cabin cover of the type B cabin.

[0027] A waterproof sealing ring is provided at the stud hole of the mounting stud on the gland 9.

[0028] A method for installing a low-temperature hatch cover of a marine liquefied gas B-type tank, the method specifically comprising the following steps:

[0029] S1, prepare a low-temperature hatch cover for a marine liquefied gas type B tank, comprising a cover body 1, a heat insulation module 8 and a gland 9, wherein the cover body 1 is mounted on the top of the dome structure of the type B tank, the heat insulation module 8 is mounted on the cover body 1, the gland 9 is mounted above the heat insulation module 8, the cover body 1 is connected and fixed to the top of the dome structure of the type B tank by bolts on all sides, the heat insulation module 8 is connected to the upper end surface of the cover body 1 in the middle section, the heat insulation module 8 is connected to the upper end surface of the peripheral insulation layer of the type B tank on both sides, and the gland 9 is connected to the cover body 1 by bolts;

[0030] S2, hoisting the cover plate body 1 to the top of the B-type cabin dome structure through the embedded eye plate 7 on the cover plate body 1 and fixing it by bolt connection;

[0031] S3, install the thermal insulation module 8 on the cover body 1, install the pressure cover 9 on the cover body 1, connect and fix the pressure cover 9 to the cover body 1 through long bolts, and press the thermal insulation module 8 on the cover body 1 to complete the installation of the low-temperature cabin cover of type B cabin.

[0032] In this embodiment, when it is necessary to open the hatch cover, first loosen the stud nuts and waterproof sealing ring on the gland 9, then lift the gland 9 away through the eye plate 7 on the gland 9, and the thermal insulation module 88 is exposed and removed. At this time, the low-temperature hatch cover body is exposed, and then the bolts around the cover body 1 are removed, and finally the cover 1 is lifted open using the embedded eye plate 7; when closing the hatch cover, the above steps can be reversed.

[0033] 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 low temperature hatch cover for a marine liquefied gas B-type tank, characterized in that: It includes a cover body, a thermal insulation module and a pressure cover, the cover body is installed on the top of the B-type cabin dome structure, the thermal insulation module is installed on the cover body, the pressure cover is installed above the thermal insulation module, the cover body is connected and fixed to the top of the B-type cabin dome structure by bolts on all sides, the middle part of the thermal insulation module is connected to the upper end surface of the cover body, the two sides of the thermal insulation module are connected to the upper end surface of the peripheral insulation layer of the B-type cabin, and the pressure cover is connected to the cover body by bolts.

2. A low temperature hatch cover for a marine liquefied gas B-type tank according to claim 1, characterized in that: The cover body is evenly provided with a plurality of mounting holes around it, the upper and lower end surfaces around the cover are respectively provided with thickened frames, the thickened frames are provided with a plurality of through holes, and the through holes on the thickened frames are correspondingly connected with the mounting holes; the end surface of the cover body is provided with a plurality of eye plates.

3. A low temperature hatch cover for a marine liquefied gas B-type tank according to claim 2, characterized in that: The eye plate arranged on the upper end surface of the cover body is an embedded eye plate, and the upper end surface of the eye plate is flush with the end surface of the cover body; a surrounding plate is arranged on the inner side of the thickened frame of the lower end surface of the cover, a baffle is arranged on the inner side of the surrounding plate, and reinforcing ribs are arranged on the inner side of the baffle, and a sealing ring is arranged between the thickened frame at the lower end of the cover and the cover body.

4. A low temperature hatch cover for a marine liquefied gas B-type tank according to claim 1, characterized in that: The thermal insulation module is square as a whole, and the two sides of the lower end of the thermal insulation module are stepped. The width of the overlap between the thermal insulation module and the upper end surface of the peripheral insulation layer of the B-type cabin is greater than the width of the peripheral insulation layer of the B-type cabin, and the thickness of the thermal insulation module at the upper end of the peripheral insulation layer of the B-type cabin is greater than the width of the peripheral insulation layer of the B-type cabin.

5. A low temperature hatch cover for a marine liquefied gas B-type tank according to claim 1, characterized in that: The gland is in the shape of a groove as a whole, the groove of the gland is stuck in the upper end of the heat insulation module, a plurality of eye plates are arranged on the gland, and the gland is connected and fixed to the cover body through long studs passing through the heat insulation module.

6. A low temperature hatch cover for a marine liquefied gas B-type tank according to claim 5, characterized in that: A waterproof sealing ring is arranged at the stud hole of the mounting stud on the gland.

7. A method for installing a low-temperature hatch cover for a marine liquefied gas B-type tank, characterized in that: The method specifically comprises the following steps: S1. Prepare a low-temperature hatch cover for a marine liquefied gas type B tank, comprising a cover plate body, a heat-insulating module and a gland, wherein the cover plate body is mounted on the top of the dome structure of the type B tank, the heat-insulating module is mounted on the cover plate body, the gland is mounted above the heat-insulating module, the cover plate body is connected and fixed to the top of the dome structure of the type B tank by bolts on all sides, the middle of the heat-insulating module is connected to the upper end surface of the cover plate body, the two sides of the heat-insulating module are connected to the upper end surface of the peripheral insulation layer of the type B tank, and the gland is connected to the cover plate body by bolts; S2, hoist the cover plate body to the top of the dome structure of the B-type cabin through the embedded eye plate on the cover plate body and fix it by bolt connection; S3, install the thermal insulation module on the cover body, install the pressure cover on the cover body, connect and fix the pressure cover to the cover body through long bolts, and press the thermal insulation module on the cover body to complete the installation of the low-temperature cabin cover of type B cabin.

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