Cryogenic tank truck

Abstract

The utility model relates to a low temperature tank truck, including tank body, traction pin seat, first reinforcing ring and second reinforcing ring. Tank body includes outer container and inner container, and outer container includes outer cylinder body and outer head. The outer cylinder body includes first cylinder body, second cylinder body and third cylinder body who are connected in turn along the front -back direction, and the radial dimension of first cylinder body is less than the radial dimension of third cylinder body. Traction pin seat is located at the bottom of first cylinder body, and its bottom surface is protruding on the bottom surface of first cylinder body. First reinforcing ring is arranged on the outer wall of first cylinder body, and the first reinforcing ring at the bottom of first cylinder body does not exceed the bottom surface of traction pin seat in height direction. Second reinforcing ring is arranged on the inner wall of third cylinder body and is located in the interlayer space. By thus setting can be advantageous to reduce the overall height of tank truck, reduce the gravity center of tank truck, improve tank truck stability, set first reinforcing ring and second reinforcing ring can improve the structural strength of tank body, improve the carrying capacity and deformation resistance.

Description

Technical Field

[0001] This utility model relates to the field of transportation vehicle technology, and in particular to a cryogenic tanker truck. Background Technology

[0002] The maximum volume limit for cryogenic tank trucks used for transporting liquefied natural gas (LNG) in China is 52.6 m³. 3 Furthermore, to ensure stable storage of cryogenic media, these tank trucks typically employ a double-layer tank structure, with a vacuum between the inner and outer tanks, and reinforcing rings to increase tank strength. This results in the outer diameter of the tank generally reaching the standard limit of 2550mm. In addition, to ensure proper matching between the tractor and the tank, the ground clearance of the towing pin at the front of the tank has a fixed range. Therefore, these vehicles are relatively tall, and their center of gravity is high when fully loaded.

[0003] When a vehicle is in a harsh transportation condition (such as a road with potholes or a sloping section), its high center of gravity can easily cause instability, which can have a certain impact on the operational safety of the tanker truck. Utility Model Content

[0004] One objective of this utility model is to overcome the shortcomings of the existing technology and provide a cryogenic tank truck. To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0005] A cryogenic tanker truck, comprising:

[0006] The tank body includes an outer container and an inner container disposed inside the outer container. The outer container and the inner container are arranged at intervals and form a sandwich space between them. The outer container includes an outer cylinder and outer heads disposed at both ends of the outer cylinder. The outer cylinder includes a first cylinder, a second cylinder and a third cylinder that are connected sequentially in the front-back direction. The radial dimension of the first cylinder is smaller than the radial dimension of the third cylinder.

[0007] The traction pin seat is located at the bottom of the first cylinder, with the bottom surface of the traction pin seat protruding downward from the bottom surface of the first cylinder, and a gap forming between the two.

[0008] The first reinforcing ring is set on the outer wall of the first cylinder, and the first reinforcing ring located at the bottom of the first cylinder does not extend beyond the bottom surface of the traction pin seat in the height direction;

[0009] The second reinforcing ring is disposed on the inner wall of the third cylinder and located in the interlayer space. The second reinforcing ring is used to strengthen the structural strength of the third cylinder.

[0010] In one embodiment, the first reinforcing ring is flush with the outer periphery of the third cylinder, away from the edge of the first cylinder.

[0011] In one embodiment, the inner container includes an inner cylinder and inner caps disposed at both ends of the inner cylinder, wherein the inner cylinder has a constant diameter structure along the front-to-back direction;

[0012] The distance between the first cylinder and the inner cylinder is less than the distance between the third cylinder and the inner cylinder.

[0013] In one embodiment, the length of the first cylinder in the front-to-back direction does not exceed one-fifth of the length of the outer cylinder.

[0014] In one embodiment, the radial dimension of the second cylinder gradually increases from front to back.

[0015] In one embodiment, the first cylinder, the second cylinder, and the third cylinder are arranged coaxially.

[0016] In one embodiment, the first reinforcing ring is a closed annular structure, or the first reinforcing ring is a segmented structure;

[0017] The second reinforcing ring can be a closed ring structure or a segmented structure.

[0018] In one embodiment, the cryogenic tanker truck includes:

[0019] The traveling mechanism is located at the bottom of the third cylinder and near the rear end of the third cylinder.

[0020] The outriggers are located at the bottom of the third cylinder and near the front end of the third cylinder.

[0021] In one embodiment, the walking mechanism includes a frame and a wheel assembly disposed at the bottom of the frame, the frame being connected to the bottom of the third cylinder;

[0022] The rear end of the chassis extends beyond the rear end of the tank, creating an accommodating space between the rear end of the chassis and the tank.

[0023] The cryogenic tanker also includes a rear compartment, which houses the tank's piping system. The rear compartment is installed at the rear of the chassis and housed within the storage space.

[0024] In one embodiment, the cryogenic tanker includes side rails disposed at the bottom of the third cylinder and located between the traveling mechanism and the outriggers.

[0025] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0026] In this invention, the cryogenic tanker includes a tank body, a traction pin seat, a first reinforcing ring, and a second reinforcing ring. The tank body includes an outer container and an inner container. The outer container includes an outer cylinder and an outer end cap. The outer cylinder includes a first cylinder, a second cylinder, and a third cylinder connected sequentially in a front-to-back direction. The radial dimension of the first cylinder is smaller than that of the third cylinder. The traction pin seat is located at the bottom of the first cylinder, with its bottom surface protruding downwards from the bottom surface of the first cylinder. The first reinforcing ring is located on the outer wall of the first cylinder, and the first reinforcing ring located at the bottom of the first cylinder does not extend beyond the bottom surface of the traction pin seat in the height direction. The second reinforcing ring is located on the inner wall of the third cylinder and is situated in the interlayer space.

[0027] By setting the radial dimension of the first cylinder to be smaller than that of the third cylinder, the radial dimension of the tank's front end can be reduced, thus decreasing the tank truck's height. Furthermore, the first reinforcing ring can be externally installed using the space recessed from the third cylinder relative to the first cylinder's outer perimeter. This enhances the structural strength of the first cylinder while avoiding an increase in the overall radial dimension of the tank's outer perimeter, thereby contributing to a lower tank truck height. Additionally, the first reinforcing ring, located at the bottom of the first cylinder, does not extend beyond the bottom surface of the towing pin seat in the height direction. This means the first reinforcing ring can be arranged using the distance between the bottom surface of the towing pin seat and the bottom surface of the first cylinder, preventing any increase in tank truck height. This design effectively reduces the overall height of the tank truck, thereby lowering its center of gravity and improving its stability.

[0028] In addition, the radial dimension of the third cylinder can be set to a larger dimension. On the one hand, this ensures that the size of the internal interlayer space is not reduced, thus ensuring good thermal insulation performance of the tank. On the other hand, the interlayer space can be used to install a second reinforcing ring to improve the structural strength of the third cylinder, thereby improving the load-bearing capacity and deformation resistance of the tank. Attached Figure Description

[0029] Figure 1 This is a structural diagram of a cryogenic tanker truck in related technologies.

[0030] Figure 2 This is a structural schematic diagram of a cryogenic tanker truck according to an embodiment of the present utility model.

[0031] Figure 3 yes Figure 2 An enlarged schematic diagram of point A on the cryogenic tanker truck shown.

[0032] The annotations in the attached figures are explained as follows:

[0033] 10 - Tank body;

[0034] 11-Outer container; 111-Outer cylinder; 112-Outer head; 113-First cylinder; 114-Second cylinder; 115-Third cylinder;

[0035] 12-Inner container; 121-Inner cylinder; 122-Inner end cap;

[0036] 13-Mezzanine space;

[0037] 20 - Traction pin seat; 30 - First reinforcing ring; 40 - Second reinforcing ring;

[0038] 50 - Running gear; 51 - Frame; 52 - Wheelset; 53 - Storage space;

[0039] 60 - Outriggers; 70 - Rear box; 80 - Side guardrails. Detailed Implementation

[0040] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0041] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) are only for the convenience of describing this application 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. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] Currently, to ensure smooth coordination between the tank truck and the tractor unit, the ground clearance of the tractor pin seat at the bottom of the tank truck has a fixed range. Generally speaking, see [reference needed]. Figure 1 As shown, in related technologies, the height of a tank truck 100 is calculated as: towing pin height L + towing pin height h + tank diameter D. To meet the towing pin height requirement, and to ensure the tank's insulation performance, a certain gap is required between the inner and outer tanks, resulting in a relatively high tank truck height. When the tank is fully loaded with media, the tank truck has a high center of gravity, making it prone to tipping over.

[0044] Based on this, the present invention provides a cryogenic tanker truck, which mainly improves the tank structure to reduce the height of the tanker to a certain extent, thereby lowering the center of gravity of the tanker truck and improving driving safety.

[0045] Please see Figure 2 As shown, the cryogenic tanker truck (hereinafter referred to as the tanker truck) of this utility model embodiment includes a tank body 10 and a traction pin seat 20, a first reinforcing ring 30 and a second reinforcing ring 40 disposed on the tank body 10, as well as a traveling mechanism 50 and outriggers 60 disposed at the bottom of the tank body 10.

[0046] For ease of description and understanding, it is hereby defined that the direction of travel of a cryogenic tanker truck is the front-to-back direction, the vertical direction perpendicular to the front-to-back direction is the up-down direction, and the horizontal direction perpendicular to the front-to-back direction is the left-to-right direction.

[0047] like Figure 2 As shown, the tank 10 has a horizontal structure, and its axial extension direction is along the front-to-back direction. The tank 10 may include an outer container 11 and an inner container 12 disposed inside the outer container 11. The inner container 12 can be used to store cryogenic media such as liquefied natural gas (LNG).

[0048] The outer container 11 is placed around the inner container 12 to protect it. The outer container 11 and the inner container 12 are arranged at intervals, forming a sandwich space 13 between them. This sandwich space 13 can be set as a vacuum environment, and the inner container 12 can be wrapped with high-vacuum multilayer heat insulation material to improve the heat insulation performance of the tank 10, reduce cold loss, and ensure the stable storage of the low-temperature medium inside the inner container 12.

[0049] like Figure 3 As shown, the outer container 11 may include an outer cylindrical body 111 and outer end caps 112 disposed at both ends of the outer cylindrical body 111. The outer cylindrical body 111 includes a first cylindrical body 113, a second cylindrical body 114, and a third cylindrical body 115 connected sequentially along the front-to-back direction. Optionally, the first cylindrical body 113 may be a standard circular cylindrical structure, that is, the first cylindrical body 113 has a uniform diameter along the front-to-back direction. For example, the diameter of the first cylindrical body 113 may be D1.

[0050] Optionally, the third cylinder 115 can be a standard circular cylinder structure, that is, the third cylinder 115 has a constant diameter along the front and rear directions. For example, the diameter of the third cylinder 115 can be D2.

[0051] like Figure 2As shown, the radial dimension of the first cylinder 113 is smaller than the radial dimension of the third cylinder 115. That is, the diameter D1 of the first cylinder 113 is smaller than the diameter D2 of the third cylinder 115. By setting the diameter of the first cylinder 113 to be smaller, the diameter of the front end of the tank 10 can be reduced, thereby reducing the height of the tank truck. Furthermore, since the diameter of the first cylinder 113 is smaller than that of the third cylinder 115, the outer peripheral wall of the first cylinder 113 is effectively recessed inwards relative to the outer peripheral wall of the third cylinder 115. This distance can serve as the arrangement space for the first reinforcing ring 30. This allows the first reinforcing ring 30 to be externally installed using this arrangement space, enhancing the structural strength of the first cylinder 113 while avoiding increasing the overall diameter of the outer peripheral contour of the tank 10 due to the first reinforcing ring 30. This, in turn, avoids increasing the height of the tank truck and helps to control the center of gravity of the tank truck to be relatively low.

[0052] Meanwhile, the radial dimension of the third cylinder 115 can be set to a larger dimension. On the one hand, this ensures that the size of the internal interlayer space 13 is not reduced, thus ensuring good thermal insulation performance of the tank 10. On the other hand, the interlayer space 13 can be used to install the second reinforcing ring 40 to improve the structural strength of the third cylinder 115.

[0053] like Figure 2 As shown, the second cylinder 114 is used to transition between the first cylinder 113 and the third cylinder 115. The diameter of the front end of the second cylinder 114 can be equal to the diameter of the first cylinder 113 to adapt to the connection of the first cylinder 113. The diameter of the rear end of the second cylinder 114 can be equal to the diameter of the third cylinder 115 to adapt to the connection of the third cylinder 115.

[0054] For example, the radial dimension of the second cylinder 114 gradually increases from front to back. That is, the second cylinder 114 can be roughly a conical cylinder structure, with its circumferential sidewalls flaring outwards in the front-back direction.

[0055] It is understood that in other embodiments, the radial dimension of the second cylinder 114 may also increase in segments from front to back. That is, the circumferential sidewall of the second cylinder 114 may be stepped in the front-to-back direction, which can be set according to actual needs.

[0056] See Figure 2 In one embodiment, the first cylinder 113, the second cylinder 114, and the third cylinder 115 are arranged coaxially. By arranging the first cylinder 113, the second cylinder 114, and the third cylinder 115 coaxially, the connection between the cylinders can be smoother, the installation can be more convenient, and the overall stress on the outer container 11 of the tank 10 can be more uniform, thereby increasing the load-bearing capacity and deformation resistance of the tank 10.

[0057] See Figure 2As shown, the inner container 12 includes an inner cylinder 121 and inner caps 122 disposed at both ends of the inner cylinder 121. The inner cylinder 121 can be a standard circular cylinder structure, that is, the inner cylinder 121 has a uniform diameter structure along the front and back directions.

[0058] In one embodiment, the distance between the first cylindrical body 113 and the inner cylindrical body 121 is smaller than the distance between the third cylindrical body 115 and the inner cylindrical body 121. Because the distance between the first cylindrical body 113 and the inner cylindrical body 121 is smaller, when the first cylindrical body 113 is configured as a smaller diameter cylindrical structure, the original size of the inner cylindrical body 121 does not need to be changed. This is equivalent to only needing to change the spacing of the interlayer space 13 between the first cylindrical body 113 and the inner cylindrical body 121 to make the radial dimension of the front end of the tank 10 smaller. Meanwhile, the spacing of the interlayer space 13 between the larger diameter third cylindrical body 115 and the inner cylindrical body 121 can still be maintained at its original larger spacing. Therefore, it can be ensured that the thermal insulation performance of the tank 10 is not significantly affected by the reduction in the diameter of the front end of the outer cylindrical body 111. At the same time, since the size of the inner cylindrical body 121 does not need to be changed, the volume of the inner container 12 can be maintained, meeting the requirement of maximizing the operating efficiency of the tank truck.

[0059] See Figure 2 In one embodiment, the length of the first cylinder 113 in the front-back direction is no more than one-fifth of the length of the outer cylinder 111. By setting the length of the first cylinder 113 to be smaller, the portion of the tank 10 that requires a reduction in the interlayer space 13 spacing can be shorter, thereby further reducing the impact of the reduced diameter of the first cylinder 113 on the thermal insulation performance of the tank 10 and ensuring good thermal insulation performance of the tank 10.

[0060] See Figure 2 As shown, in an embodiment of this utility model, the traction pin seat 20 is located at the bottom of the first cylinder 113. The traction pin seat 20 is mainly used to connect the tractor vehicle to realize the mobile transportation function of the cryogenic tanker.

[0061] In this embodiment, when the traction pin seat 20 is located at the bottom of the first cylinder 113, its bottom surface protrudes downwards from the bottom surface of the first cylinder 113. That is, there is a certain height difference between the bottom surface of the traction pin seat 20 and the bottom surface of the first cylinder 113, forming a gap between them. In this embodiment, the gap between the bottom surface of the traction pin seat 20 and the bottom surface of the first cylinder 113 can serve as the arrangement space for the first reinforcing ring 30, ensuring that the height of the first reinforcing ring 30 at the bottom of the first cylinder 113 does not exceed the bottom surface of the traction pin seat 20. Furthermore, since the first reinforcing ring 30 at the bottom of the first cylinder 113 does not exceed the bottom surface of the traction pin seat 20, there is no need to increase the height of the traction pin seat 20 to avoid interference between the externally mounted first reinforcing ring 30 and the external tractor, thereby avoiding increasing the tank truck height and effectively controlling the tank truck height to be low, thus achieving the purpose of lowering the tank truck's center of gravity.

[0062] See Figure 2 As shown, in an embodiment of this utility model, the first reinforcing ring 30 is disposed on the outer wall of the first cylinder 113. The first reinforcing ring 30 can be welded to the outer wall of the first cylinder 113. For example, the first reinforcing ring 30 can be a closed annular structure. Alternatively, the first reinforcing ring 30 can be a segmented structure.

[0063] The first reinforcing ring 30, located at the bottom of the first cylinder 113, does not extend beyond the bottom surface of the traction pin seat 20 in the height direction. By employing an externally mounted first reinforcing ring 30, it can utilize the space recessed between the outer periphery of the first cylinder 113 and the third cylinder 115, avoiding an increase in the overall diameter of the outer periphery of the tank 10. Furthermore, it can utilize the distance between the bottom surface of the traction pin seat 20 and the bottom surface of the first cylinder 113, preventing an increase in the tank truck's height. Thus, this design reduces the overall height of the tank truck, lowering its center of gravity and improving its stability.

[0064] For example, the ground clearance of the traction pin seat 20 typically has a fixed range. Figure 2 As shown, the ground clearance of the traction pin seat 20 is assumed to be L1. Simultaneously, the height of the bottom surface of the traction pin seat 20 protruding from the bottom surface of the tank body 10 typically follows relevant design specifications. For example... Figure 2 and Figure 3 As shown, assume that the height of the bottom surface of the traction pin seat 20 protruding from the bottom surface of the first cylinder 113 is L2.

[0065] Therefore, in this embodiment of the invention, the overall height of the tanker truck = the ground clearance of the towing pin seat L1 + the height of the towing pin seat L2 + the diameter D1 of the first cylinder 113. Since the first reinforcing ring 30 does not extend beyond the bottom surface of the towing pin seat 20 in the height direction, its external installation does not increase the height of the tanker truck. Furthermore, because the diameter D1 of the first cylinder 113 is reduced while the size of the inner container 12 remains unchanged (for example, the size of the inner container 12 can reach the maximum volume limit of a cryogenic tanker truck), the height of the tanker truck in this embodiment of the invention is lower than that of tankers with the same volume in related technologies. Therefore, the cryogenic tanker truck in this embodiment of the invention has a lower center of gravity and higher driving stability.

[0066] See Figure 2In one embodiment, the first reinforcing ring 30 is flush with the outer periphery of the third cylinder 115, away from the edge of the first cylinder 113. In this embodiment, by setting the edge of the first reinforcing ring 30 to be flush with the outer periphery of the third cylinder 115, the overall outer diameter of the tank 10 does not exceed the diameter of the third cylinder 115 in the front-rear direction, ensuring that the overall outer diameter of the tank 10 does not exceed the standard limit value due to the external first reinforcing ring 30.

[0067] like Figure 2 and Figure 3 As shown, assuming the height of the first reinforcing ring 30 is H and the diameter of the third cylinder 115 is D2, then in this embodiment, D1 + H = D2. Therefore, the overall height of the tanker truck = ground clearance of the traction pin seat L1 + traction pin seat height L2 + diameter of the third cylinder D2 - height of the first reinforcing ring 30 H. That is, the height of the tanker truck in this embodiment is lower than that of tankers with the same diameter in related technologies, resulting in a lower center of gravity and higher driving stability for the cryogenic tanker truck in this embodiment.

[0068] It is understood that in other embodiments, the edge of the first reinforcing ring 30 away from the first cylinder 113 may be lower than the outer periphery of the third cylinder 115, as long as the first reinforcing ring 30 located at the bottom of the first cylinder 113 does not exceed the bottom surface of the traction pin seat 20.

[0069] See Figure 2 As shown, in an embodiment of this utility model, the second reinforcing ring 40 is disposed on the inner wall of the third cylinder 115 and located in the interlayer space 13. The second reinforcing ring 40 is used to strengthen the structural strength of the third cylinder 115. The second reinforcing ring 40 may be welded to the inner wall of the third cylinder 115.

[0070] In this utility model, by adopting a built-in second reinforcing ring 40, the second reinforcing ring 40 can make full use of the interlayer space 13 between the third cylinder 115 and the inner cylinder 121 for arrangement, thereby improving the structural strength of the third cylinder 115 without affecting the thermal insulation performance of the tank 10, which is conducive to improving the load-bearing capacity and deformation resistance of the tank 10.

[0071] The second reinforcing ring 40 can be a closed annular structure. Alternatively, in other embodiments, the second reinforcing ring 40 can also be a segmented structure, which can be set according to actual needs.

[0072] Optionally, such as Figure 2 As shown, the length of the second cylinder 114 is much smaller than that of the first cylinder 113. The second cylinder 114 does not require a reinforcing structure, thus simplifying the structure of the tank 10 and reducing its manufacturing difficulty and cost.

[0073] See Figure 2 As shown, in one embodiment, the cryogenic tanker includes a traveling mechanism 50, which is disposed at the bottom of the third cylinder 115 and near the rear end of the third cylinder 115. For example, the traveling mechanism 50 may include a frame 51 and a wheel set 52 disposed at the bottom of the frame 51. The frame 51 is connected to the bottom of the third cylinder 115 and can extend in a longitudinal direction.

[0074] like Figure 2 As shown, the rear end of the frame 51 extends beyond the rear end of the tank 10, forming a receiving space 53 between the rear end of the frame 51 and the tank 10. The cryogenic tanker also includes a rear box 70, which houses the piping system of the tank 10. The rear box 70 can be installed at the rear end of the frame 51 and housed within the receiving space 53. Because the rear end of the frame 51 protrudes beyond the rear end of the tank 10, it prevents the tank 10 from being directly impacted in a rear-end collision. Furthermore, by installing the rear box 70, which houses the piping system, within the receiving space 53, the integrity of the rear box 70 and its internal piping system is effectively ensured.

[0075] See Figure 2 As shown, in one embodiment, the cryogenic tanker truck also includes outriggers 60, which are disposed at the bottom of the third cylinder 115 and near the front end of the third cylinder 115. Two outriggers 60 may be provided, symmetrically positioned on the left and right sides of the tank 10. The outriggers 60 are retractable, with their bottom ends extending downwards to rest against the road surface. When the tanker truck is not in motion, the outriggers 60 can assist in supporting the tank 10 and the truck itself, reducing the burden on the wheel assembly 52 and improving the overall stability of the vehicle. When the tanker truck is in motion, the bottom ends of the outriggers 60 can retract upwards, allowing the tractor to move the tank 10 and realize the transport function of the tanker truck.

[0076] like Figure 2 As shown, in one embodiment, the cryogenic tanker truck includes side guardrails 80, which are disposed at the bottom of the third cylinder 115 and located between the traveling mechanism 50 and the outriggers 60. Two side guardrails 80 may be provided, symmetrically positioned on the left and right sides of the tank 10. The side guardrails 80 extend in the front-rear direction, providing lateral protection to prevent other vehicles from being dragged under the truck in the event of a collision, thus ensuring the driving safety of the tanker truck.

[0077] The cryogenic tanker truck of this utility model embodiment includes a tank body, a traction pin seat, a first reinforcing ring, and a second reinforcing ring. The tank body includes an outer container and an inner container. The outer container includes an outer cylinder and an outer end cap. The outer cylinder includes a first cylinder, a second cylinder, and a third cylinder connected sequentially in a front-to-back direction. The radial dimension of the first cylinder is smaller than that of the third cylinder. The traction pin seat is located at the bottom of the first cylinder, with its bottom surface protruding downwards from the bottom surface of the first cylinder. The first reinforcing ring is located on the outer wall of the first cylinder, and the first reinforcing ring located at the bottom of the first cylinder does not extend beyond the bottom surface of the traction pin seat in the height direction. The second reinforcing ring is located on the inner wall of the third cylinder and is situated in the interlayer space.

[0078] By setting the radial dimension of the first cylinder to be smaller than that of the third cylinder, the radial dimension of the tank front end can be reduced, thus decreasing the tank truck height. Furthermore, the first reinforcing ring can be externally installed using the space between the outer periphery of the first cylinder and the third cylinder. This enhances the structural strength of the first cylinder while avoiding an increase in the overall diameter of the tank's outer periphery, thereby helping to control the tank truck height. Additionally, the first reinforcing ring, located at the bottom of the first cylinder, does not extend beyond the bottom surface of the towing pin seat in the height direction. This means the first reinforcing ring can be arranged using the distance between the bottom surface of the towing pin seat and the bottom surface of the first cylinder, avoiding any increase in tank truck height. Therefore, this design helps to reduce the overall height of the tank truck, thereby lowering the center of gravity and improving its stability.

[0079] Furthermore, since the diameter of the first cylinder where the traction pin seat is located is reduced, although the gap of the interlayer space within the first cylinder is correspondingly reduced, the spacing of the interlayer space within the third cylinder, which accounts for a larger proportion of the tank's length, can still be set to a relatively large gap. This ensures that the tank's thermal insulation performance is largely unaffected by the reduction in the diameter of the first cylinder, thus guaranteeing good thermal insulation performance. In addition, because the diameter of the front end of the tank is reduced by decreasing the gap in the interlayer space within the first cylinder, the internal container volume remains unchanged. Therefore, the cryogenic tank truck of this embodiment can achieve the goals of reducing the tank truck height, lowering the center of gravity, and improving vehicle stability while ensuring that the tank volume is not reduced and the tank's thermal insulation performance is not affected.

[0080] Furthermore, by setting the first and second reinforcing rings, the structural strength of the tank can be improved, as well as its load-bearing capacity and resistance to deformation.

[0081] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0082] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A cryogenic tank truck characterized by, include: The tank body includes an outer container and an inner container disposed inside the outer container. The outer container and the inner container are arranged at intervals and form a sandwich space between them. The outer container includes an outer cylinder and outer end caps disposed at both ends of the outer cylinder. The outer cylinder includes a first cylinder, a second cylinder, and a third cylinder that are connected sequentially in the front-back direction. The radial dimension of the first cylinder is smaller than the radial dimension of the third cylinder. A traction pin seat is provided at the bottom of the first cylinder, and the bottom surface of the traction pin seat protrudes downward from the bottom surface of the first cylinder, with a gap between them; The first reinforcing ring is disposed on the outer wall of the first cylinder, and the first reinforcing ring located at the bottom of the first cylinder does not extend beyond the bottom surface of the traction pin seat in the height direction; The second reinforcing ring is disposed on the inner wall of the third cylinder and located in the interlayer space. The second reinforcing ring is used to strengthen the structural strength of the third cylinder.

2. The cryogenic tank truck of claim 1, wherein, The first reinforcing ring is flush with the outer periphery of the third cylinder, away from the edge of the first cylinder.

3. The cryogenic tank truck of claim 1, wherein, The inner container includes an inner cylinder and inner caps disposed at both ends of the inner cylinder. The inner cylinder has a constant diameter structure along the front-to-back direction. The distance between the first cylinder and the inner cylinder is less than the distance between the third cylinder and the inner cylinder.

4. The cryogenic tank truck of claim 1, wherein, In the front-to-back direction, the length of the first cylinder does not exceed one-fifth of the length of the outer cylinder.

5. The cryogenic tank truck of claim 1, wherein, The radial dimension of the second cylinder gradually increases from front to back.

6. The cryogenic tank truck of claim 1, wherein, The first cylinder, the second cylinder, and the third cylinder are arranged coaxially.

7. The cryogenic tanker truck according to claim 1, characterized in that, The first reinforcing ring is a closed ring structure, or the first reinforcing ring is a segmented structure; The second reinforcing ring is a closed ring structure, or the second reinforcing ring is a segmented structure.

8. The cryogenic tank truck of any one of claims 1 to 7, wherein, include: A walking mechanism is provided at the bottom of the third cylinder and near the rear end of the third cylinder; Support legs are provided at the bottom of the third cylinder and near the front end of the third cylinder.

9. The cryogenic tank truck of claim 8, wherein, The walking mechanism includes a frame and a wheel assembly located at the bottom of the frame, and the frame is connected to the bottom of the third cylinder. The rear end of the vehicle frame extends beyond the rear end of the tank, and an accommodating space is formed between the rear end of the vehicle frame and the tank. The cryogenic tanker also includes a rear box, which houses the tank's piping system. The rear box is installed at the rear end of the chassis and is housed within the storage space.

10. The cryogenic tank truck of claim 8, wherein, It includes a side guardrail, which is disposed at the bottom of the third cylinder and located between the walking mechanism and the outrigger.

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