Natural gas storage tank

Abstract

The utility model discloses a natural gas storage tank, relates to the technical field of natural gas storage equipment, and aims to solve the problems that when a storage tank is used for transporting natural gas, the natural gas in the storage tank is heated, so that the pressure in the storage tank is increased, and when the pressure reaches a critical value, the storage tank is burst, so that the transportation safety is influenced. According to the technical scheme, the storage tank is characterized by comprising a storage tank body, a water storage cavity and a gas storage cavity are formed in the storage tank body, a partition plate is fixedly connected between the water storage cavity and the gas storage cavity, an air inlet is formed in the partition plate, and a limiting assembly used for preventing liquid in the water storage cavity from entering the gas storage cavity is arranged on the air inlet; the storage tank body is provided with a discharging assembly used for discharging gas in the gas storage cavity outwards. By means of the limiting assembly, natural gas can enter the gas storage cavity, the pressure intensity in the water storage cavity is reduced till the pressure intensity is kept consistent with the external pressure intensity, and therefore the problem that the storage tank body is burst by the pressure intensity is avoided, and the safety during natural gas transportation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas storage equipment, and more specifically, to a natural gas storage tank. Background Art

[0002] Natural gas is widely used as a clean, environmentally friendly and high-quality energy source. During the transportation process, natural gas is usually transported by pipeline or by means of transportation, such as tankers and ships. At this time, natural gas storage tanks are needed to store natural gas. During transportation, in order to reduce transportation costs, natural gas is usually compressed into liquid for transportation.

[0003] Publication No. CN218762667U discloses a natural gas storage tank, whose technical solution includes a tank body and a bracket, the bracket is welded to the bottom of the tank body, the tank body includes an outer shell and an inner shell, the inner shell is located in the inner cavity of the outer shell, a buffer cavity is formed between the outer shell and the inner shell, an injection pipe is connected to the end of the tank body and the buffer cavity, a drain pipe is connected to the bottom of the tank body and the buffer cavity, water valves are provided on the drain pipe and the injection pipe, a support seat is welded to the outer wall surface of the inner shell, the end of the support seat is welded to the inner wall of the outer shell, and a sand injection hole is connected to the outer shell on the surface of the tank body, and the sand injection holes are symmetrically arranged at both ends of the top of the tank body.

[0004] In the above technical solution, when using a storage tank to transport natural gas, water is injected into the injection pipe, and the water is absorbed by the sand in the buffer chamber, so that the sand is always kept moist, thereby playing a flame retardant and cooling role on the storage tank. However, in the above technical solution, when using a storage tank to transport natural gas, the external temperature will cause the moisture in the sand to evaporate, and then the external temperature can still be transmitted to the storage tank, causing the temperature in the storage tank to rise. At this time, the natural gas in the storage tank will be vaporized due to the high temperature. In order to prevent the natural gas in the storage tank from leaking, the storage tank is usually sealed. As a result, the vaporized natural gas in the storage tank cannot be discharged outward in time, causing the pressure in the storage tank to increase. When the pressure in the storage tank reaches the critical value that the storage tank can withstand, the storage tank will explode due to the influence of the air pressure, affecting the safety during transportation.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a natural gas storage tank, which solves the problem that when using the storage tank to transport natural gas, the natural gas in the storage tank is vaporized due to heat, resulting in an increase in the pressure in the storage tank. When the pressure reaches a critical value, the storage tank will be ruptured, affecting the transportation safety.

[0007] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a natural gas storage tank, including a tank body, a water storage chamber and an air storage chamber are arranged in the tank body, a partition is fixedly connected between the water storage chamber and the air storage chamber, an air inlet is provided on the partition, a limiting component is provided on the air inlet for preventing the liquid in the water storage chamber from entering the air storage chamber, a discharge component is provided on the tank body for discharging the gas in the air storage chamber to the outside, the limiting component includes a fixed block located in the air storage chamber and having a cavity inside, the fixed block and the partition are fixedly connected, the air inlet penetrates into the fixed block, a limiting block 1 is slidably connected in the cavity, the limiting block 1 and the inner side wall of the fixed block are connected by a spring 1, when the spring 1 is in a natural state, the limiting block 1 covers the air inlet, and a plurality of air outlets are provided on the side wall of the fixed block.

[0008] By adopting the above technical scheme, when the storage tank body is used to fill natural gas, the liquid natural gas will be driven into the water storage chamber of the storage tank body, and then the discharge component will be used to discharge the air in the gas storage chamber to the outside, so that the gas storage chamber is kept in a vacuum state, thereby completing the effect of filling the natural gas. When the natural gas in the water storage chamber is heated and vaporized, the pressure in the water storage chamber will begin to increase due to the influence of the vaporization of the natural gas. At the same time, the vaporized natural gas will float above the water storage chamber due to its own gravity and the pressure in the water storage chamber. The natural gas floating above the water storage chamber will enter the limiting component through the air inlet on the partition, and then enter the gas storage chamber through the limiting component. At this time, the pressure in the water storage chamber is affected and begins to decrease until it is consistent with the external pressure, thereby avoiding the problem of the storage tank body being broken by pressure and improving the safety of natural gas transportation.

[0009] The utility model is further configured as follows: there is a distance between the limiting block 1 and the inner side wall of the fixing block.

[0010] By adopting the above technical solution, the efficiency of transporting the natural gas floating in the water storage cavity to the gas storage cavity can be increased.

[0011] The utility model is further configured as follows: the discharge component includes a vacuum pump located in the air storage cavity, the vacuum pump is fixedly connected to the partition, the output end of the vacuum pump is fixedly connected to a connecting pipe, the connecting pipe passes through the storage tank body to the outside and is fixedly connected to the storage tank body, the side wall of the connecting pipe is fixedly connected to a discharge pipe, the discharge pipe and the connecting pipe are connected to each other, and a control component for controlling the discharge pipe to discharge is provided in the connecting pipe.

[0012] By adopting the above technical solution, when it is necessary to discharge the air in the air storage chamber to the outside, the restriction on natural gas is cancelled through the control component, and then the vacuum pump is started to discharge the air in the air storage chamber to the outside through the connecting pipe and the discharge pipe, so as to achieve the effect of discharging the air in the air storage chamber to the outside. After the air in the air storage chamber is discharged, the control component is driven again to control the connecting pipe and the discharge pipe to prevent the outside air from entering the air storage chamber through the connecting pipe and the discharge pipe.

[0013] The utility model is further configured as follows: the control component includes a moving rod and a rotating rod that are rotatably connected to each other, the moving rod and the rotating rod are both slidably connected to the inner wall of the connecting tube, one end of the moving rod is fixedly connected to a limiting block 2, the inner wall of the connecting tube is fixedly connected to a fixing ring, the limiting block 2 and the fixing ring abut against each other, and a through hole for the moving rod and the rotating rod to slide is opened at one end of the connecting tube away from the vacuum pump, and the rotating rod extends to the outside.

[0014] By adopting the above technical scheme, when the air in the air storage chamber needs to be discharged outwardly, a pulling force is applied to the rotating rod, driving the rotating rod to drive the moving rod to start sliding along the connecting tube, and then driving the rotating rod to rotate. At this time, the moving rod is restricted by the rotating rod and cannot move. At the same time, the limiting block 2 on the moving rod and the fixed ring are driven to cancel the abutment. At this time, the air in the connecting tube is no longer restricted and can be discharged outwardly through the discharge pipe. After the discharge is completed, the rotating rod is rotated again to drive the rotating rod back to its original position, and then a thrust is applied to the rotating rod to drive the rotating rod to drive the moving rod back to its original position. At this time, the air in the connecting tube is restricted and cannot continue to be discharged outwardly, thereby achieving the effect of controlling the discharge of air in the air storage chamber.

[0015] The utility model is further configured as follows: a second spring is sleeved on the moving rod and the rotating rod, and the two ends of the second spring are respectively connected to a second limiting block and an inner wall of the connecting tube, and when the second spring is in a natural state, the second limiting block and the fixing ring abut against each other.

[0016] By adopting the above technical solution, the movable rod and the connecting rod can be easily returned to their original positions, and at the same time, the abutment between the limiting block 2 and the fixing ring can be made tighter, thereby improving the sealing effect.

[0017] The utility model is further configured as follows: the storage tank body is wrapped with a protective shell, and a plurality of support rods are fixedly connected between the protective shell and the storage tank body.

[0018] By adopting the above technical solution, the heat insulation effect of the storage tank body can be improved, and at the same time the storage tank body can be protected and the service life of the storage tank body can be increased.

[0019] In summary, the utility model has the following beneficial effects: when the storage tank body is used to fill natural gas, the liquid natural gas will be driven into the water storage chamber of the storage tank body, and then the discharge assembly will be used to discharge the air in the gas storage chamber to the outside, so that the gas storage chamber is kept in a vacuum state, thereby completing the effect of filling the natural gas. When the natural gas in the water storage chamber is heated and vaporized, the pressure in the water storage chamber will begin to increase due to the influence of the vaporization of the natural gas. At the same time, the vaporized natural gas will float above the water storage chamber due to its own gravity and the pressure in the water storage chamber. The natural gas floating above the water storage chamber will enter the limiting assembly through the air inlet on the partition, and enter the gas storage chamber through the limiting assembly. At this time, the pressure in the water storage chamber is affected and begins to decrease until it is consistent with the external pressure, thereby avoiding the problem of the storage tank body being broken by pressure and improving the safety of natural gas transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 for Figure 2 A magnified image of point A;

[0023] Figure 4 for Figure 2 Enlarged view of point B.

[0024] In the figure: 1. storage tank body; 2. water storage chamber; 3. air storage chamber; 4. partition; 5. air inlet; 6. fixing block; 7. limiting block 1; 8. spring 1; 9. air outlet; 10. vacuum pump; 11. connecting pipe; 12. discharge pipe; 13. moving rod; 14. rotating rod; 15. limiting block 2; 16. fixing ring; 17. through hole; 18. spring 2; 19. protective shell; 20. support rod. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] A natural gas storage tank, such as Figure 1-Figure 4 As shown, it includes a storage tank body 1, a water storage chamber 2 and an air storage chamber 3 are arranged in the storage tank body 1, a partition 4 is fixedly connected between the water storage chamber 2 and the air storage chamber 3, an air inlet 5 is opened on the partition 4, and a limiting component for preventing the liquid in the water storage chamber 2 from entering the air storage chamber 3 is arranged on the air inlet 5, and a discharge component for discharging the gas in the air storage chamber 3 to the outside is arranged on the storage tank body 1. When the storage tank body 1 is used to fill natural gas, the liquid natural gas is driven into the water storage chamber 2 of the storage tank body 1, and then the discharge component is used to discharge the air in the air storage chamber 3 to the outside, so that the air storage chamber 3 is kept in a vacuum state, thereby completing the natural gas. The effect of gas filling is that when the natural gas in the water storage chamber 2 is heated and vaporized, the pressure in the water storage chamber 2 will be affected by the vaporization of the natural gas and begin to increase. At the same time, the vaporized natural gas will float above the water storage chamber 2 due to its own gravity and the pressure in the water storage chamber 2. The natural gas floating above the water storage chamber 2 will enter the limiting component through the air inlet 5 on the partition 4, and enter the gas storage chamber 3 through the limiting component. At this time, the pressure in the water storage chamber 2 is affected and begins to decrease until it is consistent with the external pressure, thereby avoiding the problem of the storage tank body 1 being broken by pressure and improving the safety of natural gas transportation.

[0029] like Figure 1-Figure 4As shown, the limiting component includes a fixed block 6 located in the air storage chamber 3 and having a cavity inside, the fixed block 6 and the partition 4 are fixedly connected, the air inlet 5 penetrates into the fixed block 6, and a limiting block 7 is slidably connected in the cavity, the limiting block 7 and the inner wall of the fixed block 6 are connected by a spring 8, when the spring 8 is in a natural state, the limiting block 7 covers the air inlet 5, and a plurality of air outlets 9 are opened on the side wall of the fixed block 6, when the natural gas in the water storage chamber 2 is vaporized, the vaporized natural gas will float above the water storage chamber 2, at this time, the limiting block 7 in the fixed block 6 will be affected by the pressure in the water storage chamber 2, driving the limiting block 7 to start moving upward, and separate from the partition 4, and at the same time driving the spring 8 to start deformation and compression, at this time, the natural gas floating in the water storage chamber 2 will be affected, enter the fixed block 6 through the air inlet 5, and enter the air storage chamber 3 through the plurality of air outlets 9 on the side wall of the fixed block 6, so as to achieve the effect of transporting the natural gas in the water storage chamber 2 to the air storage chamber 3.

[0030] After the natural gas floating in the water storage chamber 2 is transported to the gas storage chamber 3, the spring 8 begins to deform and recover and drives the limiting block 7 back to its original position. At this time, the natural gas in the water storage chamber 2 is affected by the limiting block 7 and cannot enter the gas storage chamber 3, thereby preventing the liquid of the natural gas in the water storage chamber 2 from entering the gas storage chamber 3. There is a distance between the limiting block 7 and the inner wall of the fixing block 6, which can increase the efficiency of transporting the natural gas floating in the water storage chamber 2 to the gas storage chamber 3.

[0031] like Figure 1-Figure 4 As shown, the discharge assembly includes a vacuum pump 10 located in the air storage chamber 3, the vacuum pump 10 and the partition 4 are fixedly connected, the output end of the vacuum pump 10 is fixedly connected with a connecting pipe 11, the connecting pipe 11 passes through the storage tank body 1 to the outside and is fixedly connected to the storage tank body 1, the side wall of the connecting pipe 11 is fixedly connected with a discharge pipe 12, the discharge pipe 12 and the connecting pipe 11 are connected to each other, and a control member for controlling the discharge of the discharge pipe 12 is provided in the connecting pipe 11, the control member includes a moving rod 13 and a rotating rod 14 that are rotatably connected to each other, the moving rod 13 and the rotating rod 14 are both slidably connected to the inner wall of the connecting pipe 11, one end of the moving rod 13 is fixedly connected with a limiting block 2 15, the inner wall of the connecting pipe 11 is fixedly connected with a fixing ring 16, the limiting block 2 15 and the fixing ring 16 abut against each other, and the end of the connecting pipe 11 away from the vacuum pump 10 is provided with a through hole 17 for the moving rod 13 and the rotating rod 14 to slide, and the rotating rod 14 extends to the outside.

[0032] When the air in the air storage chamber 3 needs to be discharged to the outside, a pulling force is applied to the rotating rod 14 to drive the rotating rod 14 to drive the moving rod 13 to start sliding along the connecting tube 11, and then the rotating rod 14 is driven to rotate. At this time, the moving rod 13 is restricted by the rotating rod 14 and cannot move. At the same time, the limiting block 2 15 and the fixing ring 16 on the moving rod 13 are driven to cancel the abutment. At this time, the air in the connecting tube 11 loses the restriction and can be discharged to the outside through the discharge pipe 12, thereby achieving the effect of discharging the air in the air storage chamber 3 to the outside. After the air in the air storage chamber 3 is discharged, the rotating rod 14 is rotated again to drive the rotating rod 14 back to its original position, and then the rotating rod 14 is rotated again. The movable rod 14 applies a thrust to drive the rotating rod 14 to drive the moving rod 13 back to its original position. At this time, the air in the connecting pipe 11 is restricted and cannot be discharged to the outside, so as to prevent the outside air from entering the air storage chamber 3 through the connecting pipe 11 and the discharge pipe 12. A spring 2 18 is sleeved on the moving rod 13 and the rotating rod 14. The two ends of the spring 2 18 are respectively connected to the limiting block 2 15 and the inner wall of the connecting pipe 11. When the spring 2 18 is in a natural state, the limiting block 2 15 and the fixing ring 16 abut against each other, which can facilitate the moving rod 13 and the connecting rod to return to their original positions. At the same time, it can also make the abutment between the limiting block 2 15 and the fixing ring 16 tighter, thereby improving the sealing effect.

[0033] like Figure 1-Figure 4 As shown, the tank body 1 is wrapped with a protective shell 19, and a number of support rods 20 are fixedly connected between the protective shell 19 and the tank body 1, which can improve the heat insulation effect of the tank body 1 and protect the tank body 1, thereby increasing the service life of the tank body 1.

[0034] The utility model is used normally as follows: when the storage tank body 1 is used to fill natural gas, the liquid natural gas is driven into the water storage chamber 2 of the storage tank body 1, and then a pulling force is applied to the rotating rod 14, driving the rotating rod 14 to drive the moving rod 13 to start sliding along the connecting pipe 11, and then the rotating rod 14 is driven to rotate. At this time, the moving rod 13 is restricted by the rotating rod 14 and cannot move. At the same time, the limiting block 2 15 and the fixing ring 16 on the moving rod 13 are driven to cancel the abutment. At this time, the air in the connecting pipe 11 loses restriction and can be discharged outwardly through the discharge pipe 12, thereby achieving the effect of discharging the air in the gas storage chamber 3 to the outside. After the air in the gas storage chamber 3 is discharged, the rotating rod 14 is rotated again to drive the rotating rod 14 back to its original position, and then a thrust is applied to the rotating rod 14 to drive the rotating rod 14 to drive the moving rod 13 back to its original position. At this time, the air in the connecting pipe 11 is restricted and cannot continue to be discharged outwardly, so that the gas storage chamber 3 is kept in a vacuum state, thereby completing the effect of filling natural gas.

[0035] When the natural gas in the water storage chamber 2 is heated and vaporized, the pressure in the water storage chamber 2 will begin to increase due to the influence of the vaporization of the natural gas. At the same time, the vaporized natural gas will float above the water storage chamber 2 due to the influence of its own gravity and the pressure in the water storage chamber 2. At this time, the limiting block 7 in the fixed block 6 will be affected by the pressure in the water storage chamber 2, driving the limiting block 7 to begin to move upward and separate from the partition 4. At the same time, the driving spring 8 begins to deform and compress. At this time, the natural gas floating in the water storage chamber 2 will be affected, and enter the fixed block 6 through the air inlet 5, and enter the air storage chamber 3 through several air outlets 9 on the side wall of the fixed block 6. At this time, the pressure in the water storage chamber 2 is affected and begins to decrease until it is consistent with the external pressure, thereby avoiding the problem of the tank body 1 being broken by pressure, thereby improving the safety of natural gas transportation.

[0036] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A natural gas storage tank, comprising a storage tank body (1), characterized in that: The storage tank body (1) is provided with a water storage chamber (2) and an air storage chamber (3), a partition (4) is fixedly connected between the water storage chamber (2) and the air storage chamber (3), an air inlet (5) is provided on the partition (4), a limiting component for preventing liquid in the water storage chamber (2) from entering the air storage chamber (3) is provided on the air inlet (5), a discharge component for discharging gas in the air storage chamber (3) to the outside is provided on the storage tank body (1), and the limiting component includes a gas storage chamber (2) and a gas storage chamber (3) disposed in the gas storage chamber (3). 3) and a fixed block (6) with a cavity inside, the fixed block (6) and the partition (4) are fixedly connected, the air inlet (5) passes through the fixed block (6), a limiting block (7) is slidably connected in the cavity, the limiting block (7) and the inner side wall of the fixed block (6) are connected by a spring (8), when the spring (8) is in a natural state, the limiting block (7) covers the air inlet (5), and the side wall of the fixed block (6) is provided with a plurality of air outlets (9).

2. A natural gas storage tank according to claim 1, characterized in that: There is a distance between the limiting block 1 (7) and the inner side wall of the fixing block (6).

3. A natural gas storage tank according to claim 1, characterized in that: The discharge assembly comprises a vacuum pump (10) located in the gas storage chamber (3), the vacuum pump (10) and the partition (4) are fixedly connected, the output end of the vacuum pump (10) is fixedly connected to a connecting pipe (11), the connecting pipe (11) passes through the storage tank body (1) to the outside and is fixedly connected to the storage tank body (1), the side wall of the connecting pipe (11) is fixedly connected to a discharge pipe (12), the discharge pipe (12) and the connecting pipe (11) are in communication with each other, and a control component for controlling the discharge pipe (12) to discharge is provided in the connecting pipe (11).

4. A natural gas storage tank according to claim 3, characterized in that: The control member comprises a moving rod (13) and a rotating rod (14) which are rotatably connected to each other. The moving rod (13) and the rotating rod (14) are both slidably connected to the inner wall of the connecting tube (11). One end of the moving rod (13) is fixedly connected to a second limiting block (15). The inner wall of the connecting tube (11) is fixedly connected to a fixing ring (16). The second limiting block (15) and the fixing ring (16) are in contact with each other. A through hole (17) for sliding of the moving rod (13) and the rotating rod (14) is provided at one end of the connecting tube (11) away from the vacuum pump (10). The rotating rod (14) extends toward the outside.

5. A natural gas storage tank according to claim 4, characterized in that: A second spring (18) is sleeved on the moving rod (13) and the rotating rod (14), and the two ends of the second spring (18) are respectively connected to the second limiting block (15) and the inner wall of the connecting tube (11). When the second spring (18) is in a natural state, the second limiting block (15) and the fixing ring (16) abut against each other.

6. A natural gas storage tank according to claim 1, characterized in that: The storage tank body (1) is wrapped with a protective shell (19), and a plurality of support rods (20) are fixedly connected between the protective shell (19) and the storage tank body (1).

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