Vehicle-mounted low-temperature storage tank and oil and gas transport vehicle

Abstract

The application provides a vehicle-mounted low-temperature storage tank and an oil and gas transport vehicle. The vehicle-mounted low-temperature storage tank comprises a tank body and wave-preventing assemblies. The tank body has a containing space. Two wave-preventing assemblies are arranged on both sides of the vertical center line of the tank body, and each wave-preventing assembly comprises at least one wave-preventing plate arranged in the axial direction. The first end of the wave-preventing plate in the radial direction is fixedly connected with the inner wall of the tank body, and the second end of the wave-preventing plate in the radial direction is suspended. The wave-preventing plate arranged in the axial direction in the tank body can inhibit the lateral shaking of the low-temperature liquid, and the phenomenon of gravity center deviation caused by the lateral shaking of the liquid in the tank body can be prevented, so that the safety performance of the vehicle-mounted low-temperature storage tank is improved.

Description

Technical Field

[0001] This invention belongs to the field of storage equipment technology, specifically, it relates to a vehicle-mounted cryogenic storage tank and an oil and gas transport vehicle. Background Technology

[0002] For cryogenic storage tanks, especially mobile cryogenic storage tanks, the cryogenic liquid they contain will inevitably slosh during movement, and the inertial force will generate additional dynamic loads. If the vehicle carrying the cryogenic storage tank brakes or turns, the sloshing will be more violent, the dynamic load will be greater, and it will pose a threat to the safety of the cryogenic storage tank and the vehicle.

[0003] To reduce the sloshing of cryogenic liquids, anti-sloshing plates can be installed in the inner liner of the cryogenic storage tank.

[0004] In section 6.4.17.5 of NBT 47059-2017 "Refrigerated Liquefied Gas Tank Containers", it is required that the volume between adjacent baffles / baffles and adjacent heads should not exceed 7.5m³. 3 The effective area of ​​each baffle should be no less than 70% of the cross-sectional area of ​​the inner container.

[0005] Patent document CN201487545U discloses a baffle plate for a mobile liquid container tank. By optimizing the shape of the baffle plate, the stress peak at the connection between the baffle plate and the tank and in the local area of ​​the baffle plate is reduced, thereby extending the service life of the baffle plate and the container.

[0006] Patent document CN103129864A discloses a forward-tilting baffle plate installed in a tank container, which can reduce the impact force of surge caused by braking and improve the stress condition at the fixed point between the baffle plate and the tank body.

[0007] Patent document CN206087974U discloses a novel baffle device composed of multiple independent small baffles. This invention mainly addresses the problem that after a baffle is subjected to a frontal impact, the connection between the baffle and the tank wall experiences poor stress, easily leading to fatigue cracks and causing the baffle to crack or detach.

[0008] However, existing standards and patents are primarily concerned with axial baffles, focusing mainly on the strength of the connection between the axial baffle and the tank. This indicates that current baffle designs place greater emphasis on the impact of the fluid on the baffle during braking, while paying less attention to the sloshing and impact of the fluid during turning.

[0009] For a vehicle equipped with a cryogenic storage tank, the weight of the cryogenic liquid is often equivalent to the weight of the empty vehicle. When the vehicle turns, the liquid's fluidity causes sloshing, generating impact loads on the tank walls and shifting the tanker's center of gravity, easily leading to skidding or tilting, and thus causing traffic accidents. For example, when traveling at a constant speed in a straight line, the inner liner 2 of the cryogenic storage tank and the cryogenic liquid 3 within it are in a state of... Figure 1A In the diagram, the cryogenic liquid is 50% filled, the upper part is cryogenic gas 1, and G represents the center of gravity of the cryogenic liquid. During the turn, the center of gravity of the cryogenic liquid shifts, as shown... Figure 1B As shown. However, under extreme swaying conditions during a turn, the shift in the center of gravity of the cryogenic liquid is even greater, as... Figure 1C As shown, this will increase the risk of vehicle rollover.

[0010] In view of this, the present invention is hereby proposed. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a vehicle-mounted cryogenic storage tank. By setting a baffle plate extending along the axial direction in the tank body, the lateral sloshing of the cryogenic liquid can be suppressed, and the center of gravity shift caused by the lateral sloshing of the liquid in the tank body can be prevented, thereby improving the safety performance of the vehicle-mounted cryogenic storage tank.

[0012] Another object of the present invention is to provide an oil and gas transport vehicle including the above-mentioned vehicle-mounted cryogenic storage tank.

[0013] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0014] A vehicle-mounted cryogenic storage tank, comprising:

[0015] The tank body has a storage space;

[0016] The wave-damping assembly includes two wave-damping assemblies located on both sides of the vertical centerline of the tank. Each wave-damping assembly includes at least one wave-damping plate extending axially. The wave-damping plate is fixedly connected to the inner wall of the tank at a first end in the radial direction, and the wave-damping plate is suspended at a second end in the radial direction.

[0017] In some embodiments, the baffle plate is disposed below the horizontal centerline of the tank, and the radial dimension of the baffle plate is less than or equal to three-quarters of the radius of the tank and greater than or equal to two-fifths of the radius of the tank.

[0018] In some embodiments, the distance between the first end of the baffle plate and the horizontal centerline of the tank is less than the distance between the second end of the baffle plate and the horizontal centerline of the tank.

[0019] In some embodiments, the angle between the direction of the baffle plate extending from the second end to the first end and the direction of the horizontal centerline of the tank body is in the range of 0°-60°.

[0020] In some embodiments, the two wave-damping components are arranged symmetrically about the vertical centerline of the tank.

[0021] In some embodiments, the second end of the wave deflector is provided with a flange structure.

[0022] In some embodiments, each of the wave-damping components further includes:

[0023] Multiple reinforcing ribs are provided, which are connected between the second end of the baffle plate and the inner wall of the tank body, and the multiple reinforcing ribs are spaced apart in the axial direction of the tank body.

[0024] In some embodiments, the reinforcing rib is a plate-like structure, the reinforcing rib is disposed above the wave-damping plate, and the reinforcing rib is provided with flow holes.

[0025] In some embodiments, the reinforcing rib is a plate-like structure and is disposed below the wave-damping plate.

[0026] An oil and gas transport vehicle, comprising:

[0027] The vehicle body has a mounting platform;

[0028] The vehicle-mounted cryogenic storage tank, as described above, is installed on the mounting platform of the vehicle body.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0030] In at least one embodiment of the present invention, a vehicle-mounted cryogenic storage tank is provided, in which a baffle plate extending along the axial direction is provided in the tank body to suppress the lateral sloshing of the cryogenic liquid, thereby preventing the center of gravity shift caused by the lateral sloshing of the liquid in the tank body and improving the safety performance of the vehicle-mounted cryogenic storage tank.

[0031] In the vehicle-mounted cryogenic storage tank provided by at least one embodiment of the present invention, the baffle plate is equipped with reinforcing ribs, the weld has good stress resistance, the overall rigidity is good, and fatigue cracks are not likely to occur after long-term use, and there is no potential cracking or falling off problem.

[0032] In at least one embodiment of the present invention, the vehicle-mounted cryogenic storage tank has a lightweight baffle plate that adds almost no weight to the cryogenic storage tank.

[0033] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0035] Figure 1A This is a schematic diagram illustrating the state of the internal liquid in a vehicle-mounted cryogenic storage tank during straight-line travel in existing technology.

[0036] Figure 1B This is a schematic diagram of the equilibrium state of the internal liquid in a vehicle-mounted cryogenic storage tank during a turn, as described in existing technology.

[0037] Figure 1C This is a schematic diagram of the extreme sloshing state of the internal liquid in a vehicle-mounted cryogenic storage tank during a turn, as described in existing technology.

[0038] Figure 2 This is a schematic diagram of the transverse cross-section of a vehicle-mounted cryogenic storage tank provided in some embodiments of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of the wave-blocking component provided by the present invention;

[0040] Figure 4 for Figure 3 Left view of the middle structure;

[0041] Figure 5 This is a structural schematic diagram of the transverse cross-section of a vehicle-mounted cryogenic storage tank provided in some other embodiments of the present invention.

[0042] In the diagram: 1. Cryogenic gas; 2. Inner liner of cryogenic storage tank; 3. Cryogenic liquid; 100. Vehicle-mounted cryogenic storage tank; 110. Tank body; 111. Cylinder body; 112. Containing space; 1121. Gaseous medium; 1122. Liquid medium; 120. Wave-damping assembly; 121. Wave-damping plate; 1211. First end; 1212. Second end; 122. Reinforcing rib; 123. Flanged structure.

[0043] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] like Figures 2 to 5 As shown, the vehicle-mounted cryogenic storage tank 100 provided in the exemplary embodiment of the present invention includes a tank body 110 with a receiving chamber, and a wave-damping component 120 is provided inside the tank body 110, the wave-damping component 120 extending along the axial direction of the tank body 110.

[0048] It should be noted that, for the vehicle-mounted cryogenic storage tank 100 with a sandwich structure, the tank body 110 mentioned above can also be an inner liner, and the outer shell of the inner liner is also provided with an outer shell. This invention does not limit this.

[0049] In some embodiments, the tank body 110 includes a cylindrical body 111 and a left end cap and a right end cap welded to both sides of the cylindrical body 111. The left end cap and the right end cap are sealed to both ends of the cylindrical body 111 and together with the cylindrical body 111, form the receiving space 112. For example, the left end cap and the right end cap may be flat end caps, elliptical end caps, dished end caps, etc.

[0050] like Figure 2 As shown, two wave-damping components 120 are provided and located on both sides of the vertical centerline of the tank body 110. Each wave-damping component 120 includes at least one wave-damping plate 121 extending axially. The first end 1211 of the wave-damping plate 121 in the radial direction is fixedly connected to the inner wall of the tank body 110, and the second end 1212 of the wave-damping plate 121 in the radial direction is suspended.

[0051] Optionally, the baffle plate 121 is made of the same or similar metal material as the cylinder 111, and the first end 1211 of the baffle plate 121 in the radial direction is fixedly connected to the inner wall of the tank 110 by welding. However, it should be noted that the baffle plate 121 can also be fixedly connected to the inner wall of the cylinder 111 by fastening, tenon and mortise, or other methods instead of the above-mentioned fully welded structure.

[0052] Furthermore, the two wave-damping components 120 are symmetrically arranged about the vertical center line of the tank body 110, which can improve the balance of the vehicle-mounted cryogenic storage tank 100.

[0053] In some implementations, depending on the size of the space 112 of the vehicle-mounted cryogenic storage tank 100, the baffle 121 can be a single piece or divided into multiple pieces.

[0054] For example, when the containment space 112 of the vehicle-mounted cryogenic storage tank 100 is large, the axial length of the cylinder 111 is also correspondingly long. In this case, the cylinder 111 can be formed by welding multiple cylinder sections together. Therefore, a circumferential weld will be formed at the connection between two adjacent cylinder sections. If multiple baffles 121 are provided in the axial direction, care should be taken to place the interval between two adjacent baffles 121 at the circumferential weld of the cylinder 111. This can avoid the formation of cross welds and stress concentration, and improve the strength of the tank 110.

[0055] like Figure 2 As shown, when the tank 110 contains cryogenic liquid medium 1122, the liquid level of the liquid medium 1122 in the tank 110 will not reach the top of the tank 110. The top position inside the tank 110 is the space for storing gaseous medium 1121. During the turning process of the vehicle-mounted cryogenic storage tank 100, the cryogenic liquid medium 1122 will tend to flow laterally and slosh under the action of inertia. The baffle 121 can suppress the lateral flow and sloshing of the liquid in the cryogenic storage tank, reduce the lateral movement of the center of gravity, and reduce the risk of tilting and overturning of the cryogenic transport tanker.

[0056] In some embodiments, the second suspended end 1212 of the baffle plate 121 is located near the central region of the cylinder 111. The baffle plate 121 is positioned below the horizontal centerline of the tank 110, and the radial dimension of the baffle plate 121 is less than or equal to three-quarters of the radius of the tank 110 and greater than or equal to two-fifths of the radius of the tank 110. Preferably, the radial dimension of the baffle plate 121 is one-half of the radius of the tank 110. These limitations prevent lateral sloshing of the cryogenic liquid medium and reduce the weight of the vehicle-mounted cryogenic storage tank 100.

[0057] In some embodiments, the distance between the first end 1211 of the baffle plate 121 and the horizontal center line of the tank 110 is less than the distance between the second end 1212 of the baffle plate 121 and the horizontal center line of the tank 110.

[0058] In other words, the baffle plate 121 is inclined downward from its second end 1212 to its first end 1211, which can further prevent and suppress the lateral flow and sloshing of liquid in the cryogenic storage tank.

[0059] Optionally, the angle θ between the radial extension direction of the baffle plate 121 from the second end 1212 to the first end 1211 and the horizontal centerline of the tank body 110 ranges from 0° to 60°. Preferably, the angle θ between the radial extension direction of the baffle plate 121 and the horizontal centerline of the tank body 110 is 30°.

[0060] In some implementations, such as Figure 3 and Figure 4 As shown, the wave-damping assembly 120 also includes reinforcing ribs 122 disposed on the side wall of the wave-damping plate 121. The reinforcing ribs 122 are used to improve the strength and rigidity of the wave-damping plate 121 and prevent cracks or damage.

[0061] Specifically, the wave deflector 121 is a thin plate, the thickness of which can be set according to actual needs. Multiple reinforcing ribs 122 are spaced apart along the axial direction, forming a plate-like structure extending vertically. The reinforcing ribs 122 can be provided on only one side of the wave deflector 121, or on both sides.

[0062] In some embodiments, the strength and rigidity of the wave-damping assembly 120 can also be improved by providing a flange structure 123 at the second end 1212 of the wave-damping plate 121.

[0063] The reinforcing rib 122 is roughly triangular in shape, with one short side being arc-shaped and welded to the inner wall surface of the cylinder 111, one long side being welded to the surface of the baffle plate 121, and the other long side being suspended.

[0064] For example, the reinforcing rib 122 may be made of the same or similar metal material as the cylinder 111 and the baffle plate 121 to improve welding performance.

[0065] In some embodiments, when the reinforcing rib 122 is a plate-like structure and is disposed above the wave-damping plate 121, such as... Figure 2 As shown, the structure between two adjacent reinforcing ribs 122 is a spaced section, which may cause difficulties in draining liquid. Based on this, the present invention can also provide a flow hole on the reinforcing rib 122 to allow the low temperature liquid medium 1122 to flow through.

[0066] In some embodiments, when the reinforcing rib 122 is a plate-like structure and is located below the baffle plate 121, the gap between the baffle plate 121 and the reinforcing rib 122 will not cause drainage difficulties. In this case, it is not necessary to provide drainage holes on the reinforcing rib 122.

[0067] Alternatively, the reinforcing ribs 122 can be staggered above and below the wave deflector 121 in the axial direction.

[0068] The vehicle-mounted cryogenic storage tank 100 provided by the present invention has the following advantages:

[0069] (1) The lateral baffle 121 proposed in this invention can suppress the lateral flow and sloshing of liquid in the cryogenic storage tank, slow down the lateral movement of the center of gravity, and reduce the risk of tilting and overturning of the cryogenic transport tanker.

[0070] (2) The side wave deflector 121 proposed in this invention is equipped with reinforcing ribs 122, the weld has good stress, good overall rigidity, and is not prone to fatigue cracks after long-term use, and there is no potential cracking or falling off problem;

[0071] (3) The side baffle plate 121 proposed in this invention is lightweight and hardly increases the weight of the cryogenic storage tank;

[0072] (4) The lateral wave deflector 121 proposed in this invention has a thin-walled structure, which is simple in structure and easy to manufacture.

[0073] Furthermore, the present invention also provides an oil and gas transport vehicle, which includes a vehicle body and an on-board cryogenic storage tank 100 as described above. The vehicle body has a mounting platform, and the on-board cryogenic storage tank 100 is mounted on the mounting platform of the vehicle body.

[0074] According to statistics from the China Chemical Safety Association on LNG tanker transportation accidents from 2010 to 2016, vehicle rollover accidents accounted for nearly half of all accidents. Therefore, when using the aforementioned oil and gas transport vehicle to transport oil and gas, by installing radially extending baffles 121 within the tank body 110, the lateral sloshing of cryogenic liquids can be suppressed, improving the safety of the oil and gas transport vehicle. Therefore, the oil and gas transport vehicle provided by this invention has significant practical and engineering value.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A vehicle-mounted cryogenic storage tank, characterized in that, include: The tank body has a storage space; The wave-damping assembly includes two wave-damping assemblies located on either side of the vertical centerline of the tank body, with the two wave-damping assemblies symmetrically arranged about the vertical centerline of the tank body. Each wave-damping assembly includes at least one wave-damping plate extending axially, with the first end of the wave-damping plate fixedly connected to the inner wall of the tank body in the radial direction and the second end of the wave-damping plate suspended in the radial direction. The baffle plate is located below the horizontal center line of the tank, and the radial dimension of the baffle plate is less than or equal to three-quarters of the radius of the tank and greater than or equal to two-fifths of the radius of the tank. The distance between the first end of the baffle plate and the horizontal center line of the tank is less than the distance between the second end of the baffle plate and the horizontal center line of the tank. The angle between the direction of the baffle plate extending from the second end to the first end and the horizontal centerline of the tank is in the range of 0°-60°.

2. The vehicle-mounted cryogenic storage tank according to claim 1, characterized in that, The second end of the wave-damping plate is provided with a flange structure.

3. The vehicle-mounted cryogenic storage tank according to claim 1, characterized in that, Each of the wave-damping components also includes: Multiple reinforcing ribs are provided, which are connected between the second end of the baffle plate and the inner wall of the tank body, and the multiple reinforcing ribs are spaced apart in the axial direction of the tank body.

4. The vehicle-mounted cryogenic storage tank according to claim 3, characterized in that, The reinforcing rib is a plate-shaped structure, and is located above the wave-damping plate. The reinforcing rib is provided with flow holes.

5. The vehicle-mounted cryogenic storage tank according to claim 3, characterized in that, The reinforcing rib is a plate-like structure and is located below the wave-damping plate.

6. An oil and gas transport vehicle, characterized in that, include: The vehicle body has a mounting platform; The vehicle-mounted cryogenic storage tank according to any one of claims 1-5 is installed on the mounting platform of the vehicle body.

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