Liquefied natural gas transportation and storage device with replaceable tank body

Abstract

The liquefied natural gas transportation and storage device comprises an inner storage tank, a guide rod is vertically arranged on the inner wall of the inner storage tank from top to bottom, a floating disc is slidably connected to the outer side wall of the guide rod, and a heat preservation shell is arranged outside the inner storage tank; a supporting frame is fixedly connected between the storage inner tank and the inner wall of the heat preservation shell. The storage inner tank, the heat preservation shell, the tank body and the tank tail are matched with one another, and the hollow structures of the tank body and the tank tail are mounted at the outer tail end of the heat insulation shell, so that when the outside of the transportation tank is impacted, impact force can be buffered, damage to the heat insulation shell and the more important storage inner tank is effectively reduced, and the situation of liquefied natural gas leakage is reduced; meanwhile, the tank body and the tank tail are both of a detachable structure and can be independently replaced after being damaged, when the storage inner tank is not damaged, the transportation tank can be continuously used after the outer-layer tank body is replaced, and the usability of the natural gas storage tank after accidents is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquefied natural gas transportation and storage equipment, and in particular to a liquefied natural gas transportation and storage device with a replaceable tank body. Background Art

[0002] As a clean, environmentally friendly and high-quality energy source, natural gas has been widely used. During short-distance transportation, natural gas is usually transported by tank trucks and other means of transportation.

[0003] Most of the existing LNG transport tanks are double-layer structures, with an insulating outer shell on the outside and liquefied gas stored inside. When an accident occurs during the transportation of the transport tank, the transport tank is easily damaged by external impact, and the inner storage tank will also be damaged, causing liquefied gas leakage, which poses a great safety hazard. At the same time, the damage to the inner storage tank is generally difficult to repair and cannot be used any more, and the storage tank needs to be replaced. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A liquefied natural gas transportation and storage device with a replaceable tank body, comprising a storage inner tank, wherein the inner wall of the storage inner tank is provided with a guide rod in a vertical state from top to bottom, and the outer wall of the guide rod is slidably connected to a floating plate;

[0007] An insulation shell is arranged outside the storage inner tank, a support frame is fixedly connected between the storage inner tank and the inner wall of the insulation shell, an insulating medium is arranged between the storage inner tank and the insulation shell, a can is fixedly connected to one end of the outer wall of the insulation shell, a manhole cover is arranged on the top of the can, a pillar is fixedly connected to the bottom of the can, a can tail is arranged on the other end of the outer wall of the insulation shell, a can body is arranged between the can head and the can tail, cavities are opened in the can tail and the inside of the can body, a safety valve is fixedly connected to the top of the can tail, and a support assembly is arranged at the bottom of the can body.

[0008] As a preferred solution of the liquefied natural gas transportation and storage device with a replaceable tank body described in the present invention, the insulating medium includes expanded perlite, and LNG elastic glass fiber felt is arranged between the expanded perlite and the outer wall of the storage inner tank, so as to protect the stability of the temperature of the liquefied natural gas in the storage inner tank and have good fire resistance, so as to improve the safety performance of the tank body.

[0009] As a preferred solution of the liquefied natural gas transportation and storage device with a replaceable tank body described in the present invention, nitrogen is filled between the storage inner tank and the insulation shell to prevent the expanded perlite from contacting with the air, so that the inside of the insulation shell is at a positive pressure, thereby preventing moisture in the air from being absorbed into the insulation material, resulting in deterioration of the insulation performance of the material.

[0010] As a preferred solution of the liquefied natural gas transportation and storage device with a replaceable tank body described in the present invention, both ends of the tank tail and the inner wall of the tank body are threadedly connected to the outer wall of the insulation shell. When the tank body is hit by the outer wall, the tank tail and the tank body are concave inward due to the collision, which can not only absorb energy, but also if the storage inner tank is not damaged, the tank tail and the tank body can be disassembled and replaced later and put into use again.

[0011] As a preferred solution of a liquefied natural gas transportation and storage device with a replaceable tank body described in the present invention, there are several tank bodies, and the sides of two adjacent tank bodies that are close to each other are tightly fitted and fixedly connected with anti-static rubber rings to make the connection between the tank bodies tighter.

[0012] As a preferred solution of the liquefied natural gas transportation and storage device with a replaceable tank body described in the present invention, a positioning bolt is arranged on the outside of the tank tail, and a mounting seat corresponding to the positioning bolt is fixedly connected to the end of the insulation shell. The positioning bolt passes through the tank tail and is threadedly connected to the mounting seat, so as to facilitate the installation and positioning of the tank tail and fix the tank body in the area between the tank head.

[0013] As a preferred solution of a liquefied natural gas transportation and storage device with a replaceable tank body described in the present invention, the support assembly includes a base fixedly connected to an external transport vehicle, a hydraulic rod is embedded and fixedly connected at the inner center of the base, and a support seat is fixedly connected to the top of the telescopic end of the hydraulic rod, and the top of the support seat is abutted against the outer wall of the tank body near the bottom. During transportation, the support seat supports the tank body, which is convenient for improving the stability of the storage tank during transportation. When the support seat is detached from the tank body, the tank body can be disassembled in turn.

[0014] As a preferred solution of the liquefied natural gas transportation and storage device with replaceable tank bodies described in the present invention, there are several guide rods, the distance between two adjacent guide rods is equal, and a traction belt is fixedly connected between two adjacent floating plates, and the length of the traction belt is slightly longer than the distance between the two adjacent guide rods. During transportation, under the pulling action of the traction belt between adjacent floating plates, it is easy to reduce the lifting and lowering stroke of several floating plates outside the guide rods, so that the liquefied natural gas is less shaken during transportation and is more stable.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention achieves mutual coordination among the storage inner tank, the insulation shell, the tank body and the tank tail, and installs the hollow structure of the tank body and the tank tail at the outer end of the insulation outer shell. When the outside of the transport tank is impacted, the impact force can be buffered, effectively reducing damage to the insulation shell and the more important storage inner tank, and reducing the leakage of liquefied natural gas. At the same time, the tank body and the tank tail are both detachable structures and can be replaced independently after being damaged. When the storage inner tank is intact, the transport tank can be replaced with an outer tank and continued to be used, thereby improving the availability of natural gas storage tanks after accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 This is a schematic diagram of the appearance of a liquefied natural gas transportation and storage device with a replaceable tank body according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a liquefied natural gas transportation and storage device with a replaceable tank body according to the present invention;

[0020] Figure 3 A schematic diagram of a floating ball connection of a liquefied natural gas transportation and storage device with a replaceable tank body according to the present invention;

[0021] Figure 4 This is a schematic diagram of the tank body and tank tail structure of a liquefied natural gas transportation and storage device with a replaceable tank body according to the present invention;

[0022] Figure 5 The present invention is a schematic diagram of the support assembly structure of a liquefied natural gas transportation and storage device with replaceable tanks.

[0023] Legend: 1. Storage inner tank; 2. Insulation shell; 3. Support frame; 4. Insulating medium; 5. Can head; 6. Manhole cover; 7. Tank tail; 8. Tank body; 801. Antistatic rubber ring; 9. Cavity; 10. Positioning bolt; 11. Safety valve; 12. Pillar; 13. Support assembly; 131. Base; 132. Hydraulic rod; 133. Support seat; 14. Guide rod; 15. Float; 16. Towing belt. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] See also Figure 1-5 The present invention provides a liquefied natural gas transportation and storage device with a replaceable tank body, including a storage inner tank 1, the inner wall of the storage inner tank 1 is vertically provided with a guide rod 14 from top to bottom, and the outer wall of the guide rod 14 is slidably connected to a floating plate 15.

[0028] A plurality of guide rods 14 are provided, and the distance between two adjacent guide rods 14 is equal. A traction belt 16 is fixedly connected between two adjacent floating plates 15, and the length of the traction belt 16 is slightly longer than the distance between the two adjacent guide rods 14. During transportation, under the pulling action of the traction belt 16 between adjacent floating plates 15, it is convenient to reduce the lifting and lowering stroke of several floating plates 15 outside the guide rods 14, so that the liquefied natural gas is less shaken during transportation and more stable.

[0029] An insulation shell 2 is arranged outside the storage inner tank 1, and a support frame 3 is fixedly connected between the storage inner tank 1 and the inner wall of the insulation shell 2. An insulating medium 4 is arranged between the storage inner tank 1 and the insulation shell 2. The insulating medium 4 includes expanded perlite. LNG elastic glass fiber felt is arranged between the expanded perlite and the outer wall of the storage inner tank 1, which is convenient for protecting the stability of the temperature of the liquefied natural gas in the storage inner tank 1 and has good fire resistance, so as to improve the safety performance of the tank body.

[0030] At the same time, nitrogen is filled between the storage inner tank 1 and the insulation shell 2 to prevent the expanded perlite from contacting the air, so that the inside of the insulation shell 2 is at a positive pressure, preventing moisture in the air from being absorbed into the insulation material, resulting in poor insulation performance of the material.

[0031] A can 5 is fixedly connected to one end of the outer wall of the insulation shell 2, a manhole cover 6 is arranged on the top of the can 5, and a pillar 12 is fixedly connected to the bottom of the can 5. A can tail 7 is arranged at the other end of the outer wall of the insulation shell 2, and a can body 8 is arranged between the can 5 and the can tail 7. Both ends of the inner walls of the can tail 7 and the can body 8 are threadedly connected to the outer wall of the insulation shell 2. When the tank body is hit by the outer wall, the can tail 7 and the can body 8 are concave inward due to the collision, which can not only absorb energy, but also if the inner tank 1 is stored without damage, the can tail 7 and the can body 8 can be disassembled and replaced later and put into use again.

[0032] There are several can bodies 8, and the sides of two adjacent can bodies 8 that are close to each other are tightly fitted and fixedly connected with antistatic rubber rings 801, so as to make the connection between the can bodies 8 tighter.

[0033] A positioning bolt 10 is provided on the outside of the tank tail 7, and a mounting seat corresponding to the positioning bolt 10 is fixedly connected to the end of the insulation shell 2. The positioning bolt 10 passes through the tank tail 7 and is threadedly connected to the mounting seat, which is convenient for installing and positioning the tank tail 7 and fixing the tank body 8 in the area between the can head 5.

[0034] A cavity 9 is provided inside the tank tail 7 and the tank body 8, and a safety valve 11 is fixedly connected to the top of the tank tail 7. When the tank tail 7 is subjected to external impact, if the pressure inside the tank tail 7 is too high, in order to avoid squeezing the insulation shell 2, the safety valve 11 is used to release the pressure, and the deformation of the tank tail 7 is continued to absorb energy.

[0035] A supporting assembly 13 is provided at the bottom of the tank body 8 .

[0036] The support assembly 13 includes a base 131 fixedly connected to an external transport vehicle, a hydraulic rod 132 is embedded and fixedly connected at the inner center of the base 131, a support seat 133 is fixedly connected to the top of the telescopic end of the hydraulic rod 132, and the top of the support seat 133 is abutted against the outer wall of the tank body 8 near the bottom. During transportation, the support seat 133 supports the tank body 8, so as to improve the stability of the storage tank during transportation. When the support seat 133 is detached from the tank body 8, the tank body 8 can be disassembled in turn.

[0037] When in use, the can head 5 faces the front of the vehicle, and the can body 8 and the can tail 7 face the rear of the transport vehicle. When an accident occurs during transportation, the cavities 9 in the can body 8 and the can tail 7 are filled with nitrogen, and the deformation of the can body 8 and the can tail 7 facilitates energy absorption and buffering of impact force.

[0038] Since the tank tail 7 is located at the rear of the vehicle, when it is subjected to excessive impact, it will deform and squeeze the internal nitrogen. When the internal space is compressed, the nitrogen filled inside provides a certain support for the tank body. When the nitrogen pressure is too high, the pressure can be controlled within a safe range through the safety valve 11. At this time, the tank tail 7 can continue to deform and absorb energy, thereby improving the protection effect of the insulation shell 2 and the storage inner tank 1 inside it.

[0039] If the inner storage tank 1 is not damaged upon inspection, the insulation shell 2 can be repaired by welding if damaged, and the outer tank body 8 and tank tail 7 can be thermally disassembled and reassembled after replacing a new shell, thereby improving the availability of the natural gas storage tank after an accident.

[0040] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A liquefied natural gas transportation and storage device with a replaceable tank body, comprising a storage inner tank (1), characterized in that: The inner wall of the storage inner tank (1) is provided with a guide rod (14) in a vertical state from top to bottom, and the outer wall of the guide rod (14) is slidably connected with a floating plate (15); The storage inner tank (1) is provided with an insulation shell (2) outside, a support frame (3) is fixedly connected between the storage inner tank (1) and the inner wall of the insulation shell (2), an insulation medium (4) is provided between the storage inner tank (1) and the insulation shell (2), a can (5) is fixedly connected to one end of the outer wall of the insulation shell (2), a manhole cover (6) is provided on the top of the can (5), a support (12) is fixedly connected to the bottom of the can (5), a can tail (7) is provided on the other end of the outer wall of the insulation shell (2), a can body (8) is provided between the can head (5) and the can tail (7), a cavity (9) is provided inside the can tail (7) and the can body (8), a safety valve (11) is fixedly connected to the top of the can tail (7), and a support assembly (13) is provided at the bottom of the can body (8).

2. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: The thermal insulation medium (4) comprises expanded perlite, and LNG elastic glass fiber felt is arranged between the expanded perlite and the outer wall of the storage inner tank (1).

3. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: The space between the storage inner tank (1) and the heat-insulating shell (2) is filled with nitrogen.

4. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: Both ends of the inner wall of the tank tail (7) and the tank body (8) are threadedly connected to the outer wall of the heat-insulating shell (2).

5. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: A plurality of the can bodies (8) are provided, and the sides of two adjacent can bodies (8) that are close to each other are tightly fitted and fixedly connected with antistatic rubber rings (801).

6. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: A positioning bolt (10) is arranged outside the tank tail (7), and a mounting seat corresponding to the positioning bolt (10) is fixedly connected to the end of the heat-insulating shell (2), and the positioning bolt (10) passes through the tank tail (7) and is threadedly connected to the mounting seat.

7. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: The support assembly (13) comprises a base (131) fixedly connected to an external transport vehicle, a hydraulic rod (132) is embedded and fixedly connected at the center of the base (131), a support seat (133) is fixedly connected to the top of the telescopic end of the hydraulic rod (132), and the top of the support seat (133) abuts against the outer wall of the tank body (8) near the bottom.

8. The liquefied natural gas transportation and storage device with replaceable tanks according to claim 1, characterized in that: A plurality of guide rods (14) are provided, and the distance between two adjacent guide rods (14) is equal. A traction belt (16) is fixedly connected between two adjacent floating plates (15).

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