Device for preventing LNG (Liquefied Natural Gas) storage tank from rolling over

Abstract

The utility model discloses a device for preventing an LNG (Liquefied Natural Gas) storage tank from rolling and relates to the technical field of LNG storage tank rolling prevention. The device comprises a heat insulation storage tank, a liquid injection branch pipe is fixedly arranged at the top of the heat insulation storage tank, a sealing flange cover is arranged at the bottom of the liquid injection branch pipe, a middle heat conduction pipe is vertically arranged in the middle of the inner side of the heat insulation storage tank, and lantern rings are fixedly connected to the upper end and the lower end of the middle heat conduction pipe in a sleeved mode. The lantern ring is fixedly connected with the inner side wall of the heat insulation storage tank through a connecting supporting rod, and a U-shaped heat conduction pipe is fixedly connected to the peripheral side wall of the middle heat conduction pipe. According to the heat-insulation storage tank, heat exchange can be conducted on the upper layer temperature and the lower layer temperature of the inner side through the middle heat conduction pipe, heat exchange can be conducted on the upper layer temperature and the lower layer temperature of the outer side through the U-shaped heat conduction pipe, and heat exchange of the inner side temperature and the outer side temperature can be achieved through cooperation of the middle heat conduction pipe and the U-shaped heat conduction pipe, so that the upper temperature, the lower temperature, the inner temperature and the outer temperature in the heat-insulation storage tank can be evenly distributed; and the LNG storage tank is simple in structure and convenient to machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of LNG storage tank anti-rollover, in particular to a device for preventing LNG storage tank from rolling over. Background Art

[0002] LNG is the abbreviation of liquefied natural gas, which is recognized as one of the cleanest fossil energy sources on earth. The storage temperature of LNG liquid cargo is about -163℃. When stored in such a low temperature state, there will be a large temperature difference with the surrounding environment temperature, and heat leakage will inevitably occur. When heat continues to flow into the side walls and bottom walls of the LNG storage tank, heat and mass are constantly exchanged between different layers. When the density of different layers is similar, LNG stratification and tumbling will occur. The lower layer of LNG will roll to the upper layer. When it reaches the upper layer and contacts with the gas phase space, the instantaneous pressure decreases, and it evaporates and gasifies in a short time, causing the pressure inside the storage tank to increase sharply, which has a serious impact and threat to the storage and transportation safety of LNG. After searching, the patent with application number 202321318564.0 discloses a device to prevent LNG storage tanks from rolling, including a high-pressure tank body, and a plurality of annular heat pipes are arranged on the top, middle and bottom of the inner wall of the high-pressure tank body, and the outer walls of the plurality of annular heat pipes are fixedly connected with a plurality of heat-conducting fins, and the inner circles of the plurality of annular heat pipes are fixedly connected with a plurality of horizontally connected heat pipes.

[0003] However, during actual use, the applicant found that when performing heat exchange on the inside and outside of the tank body, it is achieved through a variety of heat-conducting structures such as annular heat-conducting pipes, horizontally connected heat-conducting pipes, first vertical guide pipes, second vertical guide pipes, first heat-conducting plates, second heat-conducting plates and heat-conducting fins. The structure is complex and inconvenient for personnel to process. In view of this, we propose a device to prevent LNG storage tanks from rolling. Utility Model Content

[0004] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0005] The utility model discloses a device for preventing an LNG storage tank from rolling over, comprising an insulated storage tank, a liquid injection branch pipe is fixedly arranged on the top of the insulated storage tank, a sealing flange cover is provided at the bottom of the liquid injection branch pipe, an intermediate heat conducting pipe is vertically arranged in the middle of the inner side of the insulated storage tank, a sleeve is fixedly arranged at the upper end and the lower end of the intermediate heat conducting pipe, the sleeve is fixedly connected to the inner side wall of the insulated storage tank through a connecting support rod, a U-shaped heat conducting pipe is fixedly connected to the peripheral side wall of the intermediate heat conducting pipe, and six U-shaped heat conducting pipes are arranged in an annular array along the peripheral side wall of the intermediate heat conducting pipe, and an annular base is fixedly arranged at the bottom of the insulated storage tank.

[0006] Preferably, a heat-conducting fin is sleeved and fixed on the U-shaped heat-conducting pipe, and the heat-conducting fin is arranged in a circular sheet shape.

[0007] Preferably, a plurality of heat-conducting fins are arranged at equal intervals along the U-shaped heat-conducting pipe.

[0008] Preferably, three connecting rods are arranged in a ring array on the peripheral side wall of the collar, and one end of the connecting rod away from the collar is fixedly connected to the inner wall of the insulated storage tank.

[0009] Preferably, the upper end of the U-shaped heat conducting pipe is fixedly connected to the upper portion of the middle heat conducting pipe, and the lower end of the U-shaped heat conducting pipe is fixedly connected to the lower portion of the middle heat conducting pipe.

[0010] Preferably, handles are symmetrically fixedly provided on the top of the heat-insulating storage tank on both sides of the injection branch pipe, and a notch is provided at the bottom of the annular base, and three notches are provided at the bottom of the annular base in a circular array.

[0011] The utility model has the following beneficial effects:

[0012] The utility model discloses a device for preventing LNG storage tanks from rolling over. The device can perform heat exchange on the temperatures of the upper and lower layers inside through an intermediate heat-conducting pipe, and can perform heat exchange on the temperatures of the upper and lower layers outside through a U-shaped heat-conducting pipe. The heat exchange of the temperatures inside and outside can be realized through the cooperation of the intermediate heat-conducting pipe and the U-shaped heat-conducting pipe, so that the temperatures inside and outside the heat-insulating storage tank can be evenly distributed, and LNG stratification and rolling over can be prevented. The utility model has a simple structure and is easy to process. By evenly arranging a number of heat-conducting fins on the U-shaped heat-conducting pipe, the ability of the U-shaped heat-conducting pipe to absorb and release heat can be enhanced, and the efficiency of heat exchange can be improved, so that the temperatures inside and outside the heat-insulating storage tank can be evenly distributed more quickly, and the effect of preventing the LNG storage tank from rolling over is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0014] Figure 1 This is a schematic diagram of the internal structure of a device for preventing an LNG storage tank from rolling over according to the utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of the intermediate heat conducting pipe and the U-shaped heat conducting pipe in a device for preventing LNG storage tanks from rolling in the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the external structure of a device for preventing an LNG storage tank from rolling over.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Insulated storage tank; 11. Liquid injection branch pipe; 12. Ring base; 121. Notch; 13. Sealing flange cover; 14. Handle; 2. Intermediate heat pipe; 3. U-shaped heat pipe; 4. Ring; 41. Connecting support rod; 5. Heat conducting fin. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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 are within the scope of protection of the utility model.

[0020] See also Figure 1-3 As shown, the utility model provides a technical solution:

[0021] Embodiment 1: A device for preventing an LNG storage tank from rolling over, comprising an insulated storage tank 1, a liquid injection branch pipe 11 is fixedly arranged on the top of the insulated storage tank 1, a sealing flange cover 13 is arranged at the bottom of the liquid injection branch pipe 11, handles 14 are symmetrically fixedly arranged on the top of the insulated storage tank 1 on both sides of the liquid injection branch pipe 11, an intermediate heat conducting pipe 2 is vertically arranged in the middle of the inner side of the insulated storage tank 1, and a sleeve 4 is fixedly sleeved at the upper and lower ends of the intermediate heat conducting pipe 2, and the sleeve 4 is fixedly connected to the inner side wall of the insulated storage tank 1 through a connecting support rod 41, and the peripheral side wall of the sleeve 4 Three connecting rods 41 are arranged in an annular array on the top, and one end of the connecting rod 41 away from the collar 4 is fixedly connected to the inner wall of the heat-insulating storage tank 1. A U-shaped heat-conducting pipe 3 is fixedly connected to the peripheral side wall of the intermediate heat-conducting pipe 2, and six U-shaped heat-conducting pipes 3 are arranged in an annular array along the peripheral side wall of the intermediate heat-conducting pipe 2. The upper end of the U-shaped heat-conducting pipe 3 is fixedly connected to the upper part of the intermediate heat-conducting pipe 2, and the lower end of the U-shaped heat-conducting pipe 3 is fixedly connected to the lower part of the intermediate heat-conducting pipe 2. Through the intermediate heat-conducting pipe 2, the upper and lower parts of the intermediate heat-conducting pipes 2 can be connected to each other at a position far from the tank wall. The heat exchange of the lower temperature can be achieved by the U-shaped heat pipe 3 for the position close to the tank wall, and the heat exchange of the inner and outer temperatures can be achieved for the position close to the tank wall and the position far from the tank wall through the cooperation of the intermediate heat pipe 2 and the U-shaped heat pipe 3, so that the temperature inside the insulated storage tank 1 can be evenly distributed, thereby preventing LNG stratification and rolling, and the structure is more concise and easy to process. The bottom of the insulated storage tank 1 is fixedly provided with an annular base 12, and the bottom of the annular base 12 is provided with a notch 121, and the notch 121 at the bottom of the annular base 12 is provided in a circular array. Three places, so that the liquid on the ground can smoothly pass through the annular base 12, when in use, the inner upper and lower layer temperatures can be heat exchanged through the intermediate heat pipe 2, and the outer upper and lower layer temperatures can be heat exchanged through the U-shaped heat pipe 3, and the heat exchange of the inner and outer temperatures can be achieved through the cooperation of the intermediate heat pipe 2 and the U-shaped heat pipe 3, so that the temperature inside the insulated storage tank 1 can be evenly distributed, thereby preventing LNG stratification and rolling.

[0022] Embodiment 2: The difference between this embodiment and embodiment 1 is that, a heat-conducting fin 5 is sleeved and fixed on the U-shaped heat-conducting pipe 3. The setting of the heat-conducting fin 5 is used to enhance the ability of the U-shaped heat-conducting pipe 3 to absorb and release heat and improve the efficiency of heat exchange. The heat-conducting fin 5 is arranged in a circular sheet shape, and a number of heat-conducting fins 5 are arranged at equal intervals along the U-shaped heat-conducting pipe 3. During use, the heat-conducting fin 5 can exchange heat with the U-shaped heat-conducting pipe 3, thereby accelerating the heat exchange efficiency between the U-shaped heat-conducting pipe 3 and the outside temperature, so that the temperature inside the insulated storage tank 1 can be more quickly evenly distributed.

[0023] Working principle: When in use, the temperature of the upper and lower layers on the inside can be heat exchanged through the intermediate heat pipe 2, and the temperature of the upper and lower layers on the outside can be heat exchanged through the U-shaped heat pipe 3. The heat exchange of the inside and outside temperatures can be achieved through the cooperation of the intermediate heat pipe 2 and the U-shaped heat pipe 3, so that the temperature inside and outside the insulated storage tank 1 can be evenly distributed, preventing LNG stratification and rolling. During use, the heat-conducting fins 5 can exchange heat with the U-shaped heat pipe 3, speeding up the heat exchange efficiency between the U-shaped heat pipe 3 and the outside temperature, so that the temperature inside and outside the insulated storage tank 1 can be more quickly evenly distributed.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions described in the aforementioned embodiments and any equivalent replacement of some of the technical features therein are within the protection scope of the present invention.

Claims

1. A device for preventing an LNG storage tank from rolling over, comprising a heat-insulated storage tank (1), characterized in that: A liquid injection branch pipe (11) is fixedly arranged on the top of the heat-insulating storage tank (1), and a sealing flange cover (13) is arranged at the bottom of the liquid injection branch pipe (11). An intermediate heat-conducting pipe (2) is vertically arranged in the middle of the inner side of the heat-insulating storage tank (1), and a sleeve (4) is fixedly sleeved on the upper and lower ends of the intermediate heat-conducting pipe (2), and the sleeve (4) is fixedly connected to the inner wall of the heat-insulating storage tank (1) through a connecting support rod (41). A U-shaped heat-conducting pipe (3) is fixedly connected to the peripheral side wall of the intermediate heat-conducting pipe (2), and six U-shaped heat-conducting pipes (3) are arranged in an annular array along the peripheral side wall of the intermediate heat-conducting pipe (2). An annular base (12) is fixedly arranged at the bottom of the heat-insulating storage tank (1).

2. The device for preventing LNG storage tank from rolling over according to claim 1, characterized in that: A heat-conducting fin (5) is sleeved and fixed on the U-shaped heat-conducting pipe (3), and the heat-conducting fin (5) is arranged in a circular sheet shape.

3. The device for preventing LNG storage tank from rolling over according to claim 2, characterized in that: A plurality of heat-conducting fins (5) are arranged at equal intervals along the U-shaped heat-conducting pipe (3).

4. The device for preventing LNG storage tank from rolling over according to claim 1, characterized in that: Three connecting rods (41) are arranged in a ring array on the peripheral side wall of the collar (4), and one end of the connecting rod (41) away from the collar (4) is fixedly connected to the inner side wall of the heat-insulating storage tank (1).

5. The device for preventing LNG storage tank from rolling over according to claim 1, characterized in that: The upper end of the U-shaped heat conducting pipe (3) is fixedly connected to the upper part of the middle heat conducting pipe (2), and the lower end of the U-shaped heat conducting pipe (3) is fixedly connected to the lower part of the middle heat conducting pipe (2).

6. The device for preventing LNG storage tank from rolling over according to claim 1, characterized in that: Handles (14) are symmetrically fixedly provided on the top of the heat-insulated storage tank (1) on both sides of the injection branch pipe (11), and a notch (121) is provided at the bottom of the annular base (12), and the notches (121) at the bottom of the annular base (12) are provided in three locations in a circular array.

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