Low-temperature storage tank for liquefied natural gas (LNG)

Abstract

The utility model relates to the technical field of natural gas storage equipment, in particular to an LNG low-temperature storage tank which comprises a base, a storage tank body is arranged at the top end of the base, a safety valve is arranged on one side of the storage tank body, fixing blocks are fixedly connected to the two sides of the base, a first motor is arranged on one side of each fixing block, and a threaded rod is arranged between the fixing blocks. The second motor operates to drive the driving gear to rotate, the tooth block meshed with the driving gear and the rotating plate fixed to the tooth block are made to rotate, the natural gas detector arranged on one side of the rotating plate detects the surface of the storage tank body through rotation of the rotating plate, and the natural gas detector is matched with the first motor and the threaded rod to detect the surface of the storage tank body. The surface of the storage tank body can be carefully inspected, notches in the storage tank body can be found through detection, the notches can be made up in time, unnecessary losses are reduced, and the possibility of accidents is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas storage equipment, in particular to an LNG liquefied natural gas low-temperature storage tank. Background Art

[0002] LNG cryogenic storage tanks are equipment specially designed for the storage and transportation of liquefied natural gas. Their features include the ability to keep liquefied natural gas at extremely low temperatures to prevent it from vaporizing. These tanks play an important role in petrochemical plants and other industries, not only storing and transporting liquefied natural gas, but also ensuring the stability and security of the supply chain. They are usually composed of an inner tank and an outer tank. The inner tank wall is welded from low-temperature resistant steel plates, and the outer tank wall is a prestressed concrete structure, with high-performance insulation materials filled between the two.

[0003] After checking, the disclosure (announcement) number: CN219675359U discloses a natural gas tank leakage detection device. This technology discloses "a natural gas tank leakage detection device, including a detection platform, a detection component and a protective component. In the natural gas tank leakage detection device described in the utility model, the reduction motor in the detection platform can drive the rotating disk and the gas tank on its upper end to rotate through the rotating disk driven by the upper end, so as to perform a rotary leakage detection on the gas tank through the natural gas detector on the upper end of the column outside the rotating disk, so as to improve its detection efficiency, and the support ring installed at the bottom of the rotating disk and the roller placed in the recess on the upper end of the support ring can support the rotating disk during the detection process and reduce the friction during its rotation, so as to keep it rotating lightly. The electric push rod in the recessed ring on the outer side of the rotating disk can also drive the protective sleeve on the upper end to be arranged on the outer end of the gas tank during the rotation detection of the gas tank, so as to protect its rotation process and enhance its stability during detection".

[0004] In actual applications in real life: due to material fatigue, corrosion, structural defects, external impact, equipment failure, improper operation, untimely maintenance and human factors, natural gas storage tanks are damaged and cause natural gas leakage. Generally, the gaps of natural gas leakage are relatively small and difficult to attract people's attention. Under normal circumstances, relevant personnel rarely check the sealing of storage tanks frequently, so the natural gas in the storage tank may leak a large amount before being discovered by people, which will cause certain losses and cause some safety hazards.

[0005] In order to solve the above problems, this application proposes an LNG liquefied natural gas cryogenic storage tank. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides an LNG liquefied natural gas cryogenic storage tank, which can inspect the tank body of the storage tank and reduce the influence of air flow on the detection effect to a certain extent.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an LNG liquefied natural gas cryogenic storage tank, comprising a base, a tank body is arranged on the top of the base, a safety valve is arranged on one side of the tank body, fixed blocks are fixedly connected on both sides of the base, a first motor is arranged on one side of the fixed block, a threaded rod is arranged between the fixed blocks, a connecting block is arranged between the fixed blocks, a limiting ring is arranged on one side of the connecting block, the number of the limiting rings is two, a rotating plate is arranged on the other side of the limiting ring, a second motor is arranged on one side of the limiting ring, a driving gear is arranged on the other side of the limiting ring, a gear block is fixedly connected to the inner side of the rotating plate, and a natural gas detector is fixedly connected to the inner side of the rotating plate.

[0008] As a preferred LNG liquefied natural gas cryogenic storage tank of the utility model, the number of the fixed blocks is four, one side of two of the four fixed blocks is fixedly connected to one side of the first motor, and a threaded rod is rotatably connected between the fixed blocks. By setting the first motor, the threaded rod fixed to the output end of the first motor can be driven to rotate by the operation of the first motor.

[0009] As a preferred LNG liquefied natural gas cryogenic storage tank of the utility model, the output end of the first motor is rotatably connected to the fixed block, one end of the threaded rod is fixedly connected to the output end of the first motor, and the threaded rod is spirally connected to the connecting block. By setting the threaded rod, when the threaded rod is driven by the first motor to rotate, it can drive the connecting block spirally connected to the threaded rod to move, and drive the limit ring connected to the connecting block to move.

[0010] As a preferred LNG liquefied natural gas low-temperature storage tank of the utility model, the limit ring is located on the inner side of the connecting block, one side of the two limit rings is fixedly connected to the inner side of the connecting block, and the rotating plate is rotatably connected to the limit ring. By setting the connecting block, it is convenient to fix the limit ring by fixing the inner side of the connecting block to one side of the limit ring, thereby preventing the limit ring from shaking and deflecting during movement.

[0011] As a preferred LNG liquefied natural gas low-temperature storage tank of the utility model, one end of the second motor is fixedly connected to one side of the limit ring, the output shaft of the second motor is rotatably connected to the limit ring, and one end of the output shaft of the second motor is fixedly connected to one side of the driving gear. By setting the second motor, it is convenient to rotate the output end of the second motor by starting the second motor, and the driving gear fixed to the output end of the second motor is driven to rotate by rotating the output end of the second motor.

[0012] As a preferred LNG liquefied natural gas low-temperature storage tank of the utility model, a circular slider is fixedly connected to one side of the limit ring, and sliding grooves are provided on both sides of the rotating plate. The circular slider is consistent with the longitudinal section of the sliding groove, and the circular slider is slidably connected to the sliding groove. By setting the circular slider, it is convenient to move the circular slider to the inner side of the sliding groove by sliding between the circular slider and the sliding groove, thereby fixing the rotating plate and preventing the position of the rotating plate from deflecting.

[0013] As a preferred LNG liquefied natural gas cryogenic storage tank of the utility model, tooth blocks are fixedly connected to the left and right sides of the inner side of the connecting plate, the driving gear is meshed with the tooth blocks, and the number of the natural gas detectors is four. By setting the tooth blocks, it is convenient to mesh with the driving gear, so that the driving gear can rotate while driving the tooth blocks and the rotating plate fixedly connected to the tooth blocks to rotate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The LNG liquefied natural gas cryogenic storage tank designed by the utility model combines the second motor, the driving gear, the gear block and other components through design coordination. The second motor is operated to drive the driving gear to rotate, and the gear block meshing with the driving gear and the rotating plate fixed with the gear block are rotated. Through the rotation of the rotating plate, the natural gas detector arranged on one side of the rotating plate detects the surface of the storage tank body. In combination with the first motor and the threaded rod, the surface of the storage tank body can be carefully inspected, and the gap on the storage tank body can be found through detection, and it can be filled in time, thereby reducing unnecessary losses and reducing the possibility of accidents.

[0016] 2. The LNG liquefied natural gas cryogenic storage tank designed by the utility model combines components such as a limit ring, a rotating plate, and a slide groove through design coordination. A circular slider is provided on one side of the limit ring, and the circular slider slides with the slide groove on the rotating plate, so that the rotating plate is fixed and a relatively sealed space is formed, thereby avoiding the detection effect of the natural gas detector being affected by the influence of the airflow in the external environment when the storage tank body is inspected, thereby indirectly improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the explosion structure of the storage tank body of the utility model;

[0020] Figure 3 It is a schematic diagram of the explosion structure of the limit ring of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of point A of the utility model.

[0022] In the figure:

[0023] 1. Storage tank body; 2. Base; 3. Fixed block; 4. First motor; 5. Safety valve; 6. Connecting block; 7. Second motor; 8. Limiting ring; 9. Rotating plate; 10. Driving gear; 11. Gear block; 12. Natural gas detector; 13. Round slider; 14. Slide groove; 15. Threaded rod. DETAILED DESCRIPTION

[0024] 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 in 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.

[0025] Example 1

[0026] like Figures 1 to 4 As shown;

[0027] A LNG liquefied natural gas cryogenic storage tank comprises a storage tank body.

[0028] In this embodiment: after checking the public (announcement) number CN219675359U, a natural gas tank leakage detection device is disclosed, in order to solve the problems existing in the prior art, such as the above background technology disclosure "in real life, due to material fatigue, corrosion, structural defects, external impact, equipment failure, improper operation, untimely maintenance, and human factors, the natural gas tank is damaged and the natural gas leaks, and the gap where the natural gas leaks is usually small, which is difficult to attract people's attention, and under normal circumstances, the relevant personnel seldom frequently check the sealing of the tank, so the natural gas in the tank may leak a lot before being discovered by people".

[0029] In view of this, in order to solve this technical problem, a limit ring and a rotating plate are added to the application document.

[0030] According to the above content, in order to be able to carry out a detailed inspection of the storage tank, a LNG liquefied natural gas cryogenic storage tank is also included, including a base 2, a storage tank body 1 is arranged on the top of the base 2, a safety valve 5 is arranged on one side of the storage tank body 1, fixed blocks 3 are welded on both sides of the base 2, a first motor 4 is arranged on one side of the fixed block 3, a threaded rod 15 is arranged between the fixed blocks 3, a connecting block 6 is arranged between the fixed blocks 3, a limiting ring 8 is arranged on one side of the connecting block 6, the number of the limiting rings 8 is two, a rotating plate 9 is arranged on the other side of the limiting ring 8, a second motor 7 is arranged on one side of the limiting ring 8, a driving gear 10 is arranged on the other side of the limiting ring 8, a gear block 11 is fixedly connected to the inner side of the rotating plate 9, and a natural gas detector 12 is fixed to the inner side of the rotating plate 9 by screws.

[0031] In this embodiment, the second motor 7 is operated to drive the driving gear 10 to rotate, and the tooth block 11 meshing with the driving gear 10 and the rotating plate 9 fixed to the tooth block 11 are rotated. Through the rotation of the rotating plate 9, the natural gas detector 12 arranged on one side of the rotating plate 9 detects the surface of the storage tank body 1. In conjunction with the first motor 4 and the threaded rod 15, the surface of the storage tank body 1 can be carefully inspected, and the gaps on the storage tank body 1 can be found through the detection and filled in time, thereby reducing unnecessary losses and reducing the possibility of accidents.

[0032] In an optional embodiment, the number of the fixing blocks 3 is four, one side of two fixing blocks 3 among the four fixing blocks 3 is fixedly connected to one side of the first motor 4 , and a threaded rod 15 is rotatably connected between the fixing blocks 3 .

[0033] In this embodiment, by providing the first motor 4 , the threaded rod 15 fixed to the output end of the first motor 4 can be driven to rotate by the operation of the first motor 4 .

[0034] In an optional embodiment: the output end of the first motor 4 is rotatably connected to the fixed block 3 , one end of the threaded rod 15 is fixedly connected to the output end of the first motor 4 , and the threaded rod 15 is spirally connected to the connecting block 6 .

[0035] In this embodiment: by providing the threaded rod 15, when the threaded rod 15 is driven by the first motor 4 to rotate, it can drive the connecting block 6 spirally connected to the threaded rod 15 to move, and drive the limiting ring 8 connected to the connecting block 6 to move.

[0036] In an optional embodiment: the limiting ring 8 is located on the inner side of the connecting block 6 , one side of the two limiting rings 8 is fixedly connected to the inner side of the connecting block 6 , and the rotating plate 9 is rotatably connected to the limiting ring 8 .

[0037] In this embodiment: by providing the connecting block 6, the limiting ring 8 is fixed by fixing the inner side of the connecting block 6 to one side of the limiting ring 8, thereby preventing the limiting ring 8 from shaking and deflecting when moving.

[0038] According to the above content, one end of the second motor 7 is fixedly connected to one side of the limit ring 8, the output shaft of the second motor 7 is rotationally connected to the limit ring 8, and one end of the output shaft of the second motor 7 is fixedly connected to one side of the driving gear 10.

[0039] In this embodiment, by providing the second motor 7, the output end of the second motor 7 can be rotated by starting the second motor 7, and the driving gear 10 fixed to the output end of the second motor 7 can be rotated by the rotation of the output end of the second motor 7.

[0040] In an optional embodiment: a circular slider 13 is fixedly connected to one side of the limiting ring 8, and slide grooves 14 are opened on both sides of the rotating plate 9. The longitudinal sections of the circular slider 13 and the slide groove 14 are consistent, and the circular slider 13 is slidably connected to the slide groove 14.

[0041] In this embodiment, the circular slider 13 is provided to facilitate the circular slider 13 to move to the inner side of the slide groove 14 through sliding between the circular slider 13 and the slide groove 14, thereby fixing the rotating plate 9 and preventing the position of the rotating plate 9 from being deflected.

[0042] In an optional embodiment: gear blocks 11 are fixedly connected to the left and right sides of the inner side of the connecting plate, the driving gear 10 is meshed with the gear blocks 11, and the number of the natural gas detectors 12 is four.

[0043] In this embodiment, the tooth block 11 is provided to facilitate the meshing between the tooth block 11 and the driving gear 10, so that the driving gear 10 can rotate and drive the tooth block 11 and the rotating plate 9 fixedly connected to the tooth block 11 to rotate.

[0044] Working principle and use process of the utility model: When using the utility model, first install the storage tank body 1 on the base 2 so that the surface of the storage tank body 1 contacts the inner circle of the limit ring 8, and the two sides of the base 2 are fixedly connected with fixed blocks 3, the number of fixed blocks 3 is four, and one side of two of the four fixed blocks 3 is fixedly connected with the first motor 4, the output shaft of the first motor 4 is also rotatably connected to the fixed block 3, and a threaded rod 15 is also provided between the fixed blocks 3, one end of the threaded rod 15 is fixedly connected to the output end of the first motor 4, and the two ends of the threaded rod 15 are rotatably connected to the fixed block 3, so when the first motor 4 is started, it will drive the first motor 4 The threaded rod 15 fixed on the output shaft rotates, and a connecting block 6 is provided on the threaded rod 15, and the connecting block 6 is spirally connected to the threaded rod 15, so when the threaded rod 15 starts to rotate, it will drive the connecting block 6 to move, and a limiting ring 8 is provided on the inner side of the connecting block 6, and one side of the limiting ring 8 is fixedly connected to the inner side of the connecting block 6, so when the connecting block 6 starts to move, it will correspondingly drive the limiting ring 8 to move back and forth, and a rotating plate 9 is provided on the other side of the limiting ring 8, and a second motor 7 is provided on one side of the limiting ring 8, one end of the second motor 7 is fixedly connected to one side of the limiting ring 8, and the output shaft of the second motor 7 is rotatably connected to the limiting ring 8, and the limiting ring A driving gear 10 is also provided on the other side of 8, one end of the output shaft of the second motor 7 is fixedly connected to one side of the driving gear 10 provided on the other side of the limiting ring 8, and a circular slider 13 is also fixedly connected to the other side of the limiting ring 8, which is provided on both sides of the rotating plate 9 inside the two limiting rings 8, and a slide groove 14 is provided at a position corresponding to the position of the circular slider 13, the longitudinal section of the circular slider 13 is consistent with the longitudinal section of the slide groove 14, and the circular slider 13 slides with the slide groove 14 and is located on the inner side of the slide groove 14, so that the rotating plate 9 can be fixed by the circular slider 13, and the rotating plate 9 can be freely rotated while being fixed. , and a plurality of tooth blocks 11 are fixed on both sides of the inner ring of the rotating plate 9, and the tooth blocks 11 are meshed with the driving gear 10, and the rotating plate 9 itself can rotate, so when the second motor 7 starts to run, it will drive the driving gear 10 fixedly connected to one end of the output end of the second motor 7 to start rotating, and when the driving gear 10 starts to rotate, the tooth blocks 11 meshed with the driving gear 10 will drive the rotating plate 9 fixed with the tooth blocks 11 to rotate under the drive of the driving gear 10, and the inner ring of the rotating plate 9 is also fixed with a plurality of natural gas detectors 12, and the models of the natural gas detectors 12 used here can be specifically selected from Dräger Polytron 7000 and Polytron 8700IR and Honeywell Sensepoint XCD and Honeywell Midas, etc., so that the natural gas detector 12 will rotate around the tank body of the storage tank body 1 under the drive of the rotating plate 9, and detect and scan the surface of the storage tank body 1, so as to find out the gaps and notches on the surface of the tank body,The limiting ring 8 will also slide along the surface of the storage tank body 1 under the push of the first motor 4 and the threaded rod 15, so that the natural gas detector 12 can conduct a comprehensive inspection of the surface of the tank body 1 to prevent the tank body from being damaged without the user's knowledge, which may cause natural gas leakage and create safety hazards. The safety valve 5 set at one end of the storage tank body 1 is used to transport natural gas to the outside.

[0045] In the present invention, the first motor 4, the threaded rod 15, the driving gear 10 and other components are all prior art, and their working principles are consistent with similar products on the market, so no further description is given here.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A LNG liquefied natural gas cryogenic storage tank, comprising a base (2), characterized in that: A storage tank body (1) is arranged at the top of the base (2), a safety valve (5) is arranged on one side of the storage tank body (1), fixed blocks (3) are fixedly connected on both sides of the base (2), a first motor (4) is arranged on one side of the fixed block (3), a threaded rod (15) is arranged between the fixed blocks (3), a connecting block (6) is arranged between the fixed blocks (3), a limiting ring (8) is arranged on one side of the connecting block (6), the number of the limiting rings (8) is two, a rotating plate (9) is arranged on the other side of the limiting ring (8), a second motor (7) is arranged on one side of the limiting ring (8), a driving gear (10) is arranged on the other side of the limiting ring (8), a tooth block (11) is fixedly connected to the inner side of the rotating plate (9), and a natural gas detector (12) is fixedly connected to the inner side of the rotating plate (9).

2. The LNG liquefied natural gas cryogenic storage tank according to claim 1, characterized in that: The number of the fixed blocks (3) is four, one side of two of the four fixed blocks (3) is fixedly connected to one side of the first motor (4), and a threaded rod (15) is rotatably connected between the fixed blocks (3).

3. The LNG liquefied natural gas cryogenic storage tank according to claim 1, characterized in that: The output end of the first motor (4) is rotatably connected to the fixed block (3), one end of the threaded rod (15) is fixedly connected to the output end of the first motor (4), and the threaded rod (15) is spirally connected to the connecting block (6).

4. The LNG liquefied natural gas cryogenic storage tank according to claim 1, characterized in that: The limiting ring (8) is located on the inner side of the connecting block (6), one side of the two limiting rings (8) is fixedly connected to the inner side of the connecting block (6), and the rotating plate (9) is rotatably connected to the limiting ring (8).

5. The LNG liquefied natural gas cryogenic storage tank according to claim 1, characterized in that: One end of the second motor (7) is fixedly connected to one side of the limiting ring (8), the output shaft of the second motor (7) is rotationally connected to the limiting ring (8), and one end of the output shaft of the second motor (7) is fixedly connected to one side of the driving gear (10).

6. The LNG liquefied natural gas cryogenic storage tank according to claim 1, characterized in that: A circular slider (13) is fixedly connected to one side of the limiting ring (8), and sliding grooves (14) are provided on both sides of the rotating plate (9). The longitudinal sections of the circular slider (13) and the sliding groove (14) are consistent, and the circular slider (13) and the sliding groove (14) are slidably connected.

7. The LNG liquefied natural gas cryogenic storage tank according to claim 1, characterized in that: Gear blocks (11) are fixedly connected to the left and right sides of the inner side of the connecting plate, the driving gear (10) is meshed with the gear blocks (11), and the number of the natural gas detectors (12) is four.

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