Anti-rolling LNG (Liquefied Natural Gas) storage and transportation tank

Abstract

The anti-rolling LNG storage and transportation tank comprises a tank body, fixing seats and a driving mechanism, the fixing seats are arranged at the two ends of the tank body, the tank body is rotationally connected with the fixing seats, the driving mechanism is arranged at the bottom of the tank body, an arc-shaped rack matched with the driving mechanism is arranged at the bottom of the outer wall of the tank body, and the arc-shaped rack is detachably connected with the tank body. A plurality of blades are evenly arranged on the inner wall of the tank body in the circumferential direction at intervals, and through holes distributed in an array mode are formed in the blades. When the device works, the liquefied natural gas in the tank body is stirred by the blades, layering of the liquefied natural gas is prevented, and the risk of rolling of the liquefied natural gas is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG storage and transportation equipment, in particular to an anti-rollover LNG storage and transportation tank. Background Art

[0002] LNG is the abbreviation of liquefied natural gas, which is generally transported and transferred through storage tanks. During the transportation of storage tanks loaded with LNG, the LNG in the tank has different densities, resulting in components with high density at the bottom and components with low density at the top, and the density difference will form stratification. The heat outside the storage tank is always transferred from the outside to the inside. A considerable part of the heat obtained by the bottom LNG causes the temperature of the LNG to rise. As the temperature rises, the density will decrease. When the density of the bottom LNG is less than that of the upper LNG, the stratification balance will be destroyed, forming the so-called "rollover". Once LNG rolls over, a large amount of natural gas vaporized in a short period of time is difficult to be discharged through the safety release valve in time. The pressure in the storage tank rises sharply, causing damage to the storage tank, and even causing fire and explosion accidents, bringing huge safety hazards. In order to prevent rollover, it is necessary to destroy the stratification of LNG in the tank in advance. The existing technology generally uses stirring or pump forced reflux to destroy the stratification and strengthen mixing. However, the conventional storage tank body is equipped with a motor-driven stirring method, which has high requirements for the explosion-proof performance of the LNG tank and poor effect in preventing rollover. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an anti-rollover LNG storage and transportation tank.

[0004] The technical solution of the utility model is: an anti-rollover LNG storage and transportation tank, including a tank body, a fixed seat and a driving mechanism, fixed seats are provided at both ends of the tank body, the tank body and the fixed seat are rotatably connected, the bottom of the tank body is provided with a driving mechanism, the bottom of the outer wall of the tank body is provided with an arc-shaped rack that cooperates with the driving mechanism, the arc-shaped rack is detachably connected to the tank body, and a plurality of evenly spaced blades are provided on the circumference of the inner wall of the tank body, and array-distributed through holes are provided on the blades.

[0005] Furthermore, a plurality of symmetrically distributed lifting ears are provided on the upper portion of the tank body.

[0006] Furthermore, fasteners are provided at both ends of the arc-shaped rack, and threaded holes threadedly connected to the fasteners are provided on the tank body.

[0007] Furthermore, the fixing seat includes a base and a clamping member, one side of the base is connected to one end of the clamping member through a hinge, and the other side is detachably connected through a locking bolt.

[0008] Furthermore, a plurality of rollers are provided on the circumference of the base and the clamping member on one side close to the tank body, and an annular groove matching the rollers is provided on the tank body.

[0009] Furthermore, the driving mechanism includes a motor, a bearing seat and a gear; a rotating shaft is provided at the output end of the motor, the other end of the rotating shaft is rotatably connected to the bearing seat, a gear is provided on the rotating shaft, and the gear is meshed with the arc-shaped rack.

[0010] Furthermore, a plurality of arc-shaped racks are provided in the length direction of the tank body, and a plurality of gears are provided on the rotating shaft.

[0011] Compared with the prior art, the utility model has the following advantages: the driving mechanism drives the tank body to rotate back and forth, so that the blades stir the liquefied natural gas inside the tank body, so that the liquefied natural gas above and below is mixed to prevent the formation of stratification; the through holes on the blades facilitate the formation of turbulence when stirring the liquefied natural gas, so that the liquefied natural gas is mixed evenly; the driving mechanism is outside the tank body, and the liquefied natural gas is sealed inside the tank body, so the explosion-proof requirements for the driving mechanism are not high, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is an overall schematic diagram of the utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the tank body of the utility model;

[0015] Figure 3 It is a schematic diagram of the fixing seat of the utility model.

[0016] Among them: 1. tank body; 2. fixing seat; 3. driving mechanism; 11. annular groove; 12. blades; 13. lifting ears; 14. arc-shaped rack; 21. base; 22. clamping plate; 23. locking bolt; 24. roller; 25. hinge; 31. motor; 32. bearing seat; 33. gear; 34. rotating shaft; 141. fasteners. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0018] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0019] like Figures 1 to 3 As shown, an anti-rollover LNG storage and transportation tank includes a tank body 1, a fixing seat 2 and a driving mechanism 3. The fixing seats 2 are provided at both ends of the tank body 1, and the tank body 1 is rotatably connected to the fixing seat 2. The driving mechanism 3 is provided at the bottom of the tank body 1. An arc-shaped rack 14 cooperating with the driving mechanism 3 is provided at the bottom of the outer wall of the tank body 1, and fasteners 141 are provided at both ends of the arc-shaped rack 14. The tank body 1 is provided with a threaded hole threadedly connected to the fastener 141. The detachable arc-shaped rack 14 is convenient for repair and maintenance. A plurality of blades 12 with uniform intervals are provided on the circumference of the inner wall of the tank body 1, and the blades 12 are provided with through holes distributed in an array. A plurality of symmetrically distributed lifting ears 13 are provided on the upper part of the tank body 1. The lifting ears 13 facilitate the lifting and transfer of the tank body 1.

[0020] The fixing seat 2 includes a base 21 and a clamping member, one side of the base 21 is connected to one end of the clamping member by a hinge 25, and the other side is detachably connected by a locking bolt 23. When the tank body 1 needs to be assembled with the fixing seat 2, the clamping member is opened, so that the tank body 1 enters the fixing seat 2 from above the base 21, and then the clamping member is closed and fixed by the locking bolt 23 to complete the assembly of the tank body 1 and the fixing seat 2. By changing the opening and closing state of the clamping member and the base 21, it is convenient to assemble or disassemble the tank body 1. A plurality of rollers 24 are provided on the circumference of the base 21 and the clamping member on one side close to the tank body 1, and an annular groove 11 matching the rollers 24 is provided on the tank body 1. The fixing seat 2 is in rolling contact with the tank body 1 through the rollers 24, which reduces the friction between the tank body 1 and the fixing seat 2, and reduces the resistance when the tank body 1 rotates.

[0021] The driving mechanism 3 includes a motor 31, a bearing seat 32 and a gear 33. A rotating shaft 34 is provided at the output end of the motor 31, and the other end of the rotating shaft 34 is rotatably connected to the bearing seat 32. A gear 33 is provided on the rotating shaft 34, and the gear 33 is meshed with the arc-shaped rack 14. The motor 31 drives the rotating shaft 34 to rotate, and the gear 33 fixedly connected to the rotating shaft 34 drives the tank body 1 to rotate. When the motor 31 changes the direction of rotation, the rotation direction of the tank body 1 also changes accordingly. The blades 12 stir the liquefied natural gas in the tank body 1 so that the liquefied natural gas in the upper and lower parts of the tank body 1 is evenly mixed to prevent stratification. A plurality of arc-shaped racks 14 are provided in the length direction of the tank body 1, and a plurality of gears 33 are provided on the rotating shaft 34. The cooperation of multiple racks and gears 33 can effectively share the torque and extend the service life of the driving mechanism 3.

[0022] The working principle of the specific embodiment of the utility model is as follows: liquefied natural gas is stored in the tank body 1, the motor 31 drives the rotating shaft 34 to rotate, and the gear 33 drives the tank body 1 to rotate. The motor 31 controls the speed and rotation direction of the tank body 1, and the blades 12 stir the liquefied natural gas in the upper and lower parts of the tank body 1 to prevent the liquefied natural gas from stratification.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An anti-rollover LNG storage and transportation tank, characterized in that: The invention comprises a tank body (1), a fixing seat (2) and a driving mechanism (3), wherein the fixing seats (2) are provided at both ends of the tank body (1), the tank body (1) is rotatably connected to the fixing seat (2), the driving mechanism (3) is provided at the bottom of the tank body (1), an arc-shaped rack (14) cooperating with the driving mechanism (3) is provided at the bottom of the outer wall of the tank body (1), the arc-shaped rack (14) is detachably connected to the tank body (1), and a plurality of blades (12) evenly spaced are provided on the circumference of the inner wall of the tank body (1), and the blades (12) are provided with through holes distributed in an array.

2. The anti-rollover LNG storage and transportation tank according to claim 1 is characterized in that: The upper part of the tank body (1) is provided with a plurality of symmetrically distributed lifting ears (13).

3. The anti-rollover LNG storage and transportation tank according to claim 1 is characterized in that: Fasteners (141) are provided at both ends of the arc-shaped rack (14), and threaded holes threadedly connected to the fasteners (141) are provided on the tank body (1).

4. The anti-rollover LNG storage and transportation tank according to claim 1 is characterized in that: The fixing seat (2) comprises a base (21) and a clamping member, one side of the base (21) is connected to one end of the clamping member via a hinge (25), and the other side is detachably connected via a locking bolt (23).

5. The anti-rollover LNG storage and transportation tank according to claim 4 is characterized in that: A plurality of rollers (24) are provided in the circumferential direction of the base (21) and a side of the clamping member close to the tank body (1), and an annular groove (11) matching the rollers (24) is provided on the tank body (1).

6. The anti-rollover LNG storage and transportation tank according to claim 1 is characterized in that: The driving mechanism (3) comprises a motor (31), a bearing seat (32) and a gear (33); a rotating shaft (34) is provided at the output end of the motor (31), the other end of the rotating shaft (34) is rotatably connected to the bearing seat (32), a gear (33) is provided on the rotating shaft (34), and the gear (33) is meshed with the arc-shaped rack (14).

7. The anti-rollover LNG storage and transportation tank according to claim 6 is characterized in that: A plurality of arc-shaped racks (14) are provided on the length direction of the tank body (1), and a plurality of gears (33) are provided on the rotating shaft (34).

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