Low-temperature tank car

Abstract

The invention relates to a low-temperature tank car which comprises a tank body, a traction pin seat, a first reinforcing ring and a second reinforcing ring. The tank body comprises an outer container and an inner container, and the outer container comprises an outer cylinder and an outer seal head. The outer barrel comprises a first barrel, a second barrel and a third barrel which are sequentially communicated in the front-back direction, and the radial size of the first barrel is smaller than that of the third barrel. The traction pin seat is arranged at the bottom of the first cylinder, and the bottom face of the traction pin seat protrudes out of the bottom face of the first cylinder downwards. The first reinforcing ring is arranged on the outer wall of the first cylinder, and the first reinforcing ring located at the bottom of the first cylinder does not exceed the bottom face of the traction pin base in the height direction. The second reinforcing ring is arranged on the inner wall of the third cylinder and located in the interlayer space. Through the arrangement, the overall height of the tank car can be reduced, the gravity center of the tank car is lowered, the stability of the tank car is improved, and the first reinforcing ring and the second reinforcing ring are arranged to improve the structural strength of the tank body and improve the bearing capacity and deformation resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of transport vehicles, and in particular to a cryogenic tank truck. Background Art

[0002] The maximum volume limit of cryogenic tank trucks for domestic transportation of liquefied natural gas (LNG) is 52.6m 3 To ensure stable storage of cryogenic media, these tank trucks typically utilize a double-layered structure, with a vacuum seal between the inner and outer tanks and reinforcement rings for added strength. This results in a tank's outer diameter typically reaching the standard limit of 2550mm. Furthermore, to ensure compatibility between the tractor and the tank, the towing pin seat at the front of the tank has a fixed ground clearance. Consequently, these trucks are taller and have a higher center of gravity when fully loaded.

[0003] When the vehicle is in a relatively bad transportation condition (such as potholes and slopes), the vehicle's high center of gravity can easily lead to vehicle instability, which has a certain impact on the operational safety of the tank truck. Summary of the Invention

[0004] One purpose of the present invention is to solve the deficiencies in the prior art and provide a cryogenic tank truck. To solve the above technical problems, the present invention adopts the following technical solutions: A cryogenic tank truck, comprising: The tank body includes an outer container and an inner container arranged inside the outer container, the outer container and the inner container are spaced apart and form an interlayer space therebetween, the outer container includes an outer cylinder and outer heads arranged at both ends of the outer cylinder, wherein the outer cylinder includes a first cylinder, a second cylinder and a third cylinder sequentially connected in the front-to-back direction, and the radial dimension of the first cylinder is smaller than the radial dimension of the third cylinder; The traction pin seat is arranged 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, and a gap is formed between the two; A first reinforcement ring is provided on the outer wall of the first cylinder, and the first reinforcement ring located at the bottom of the first cylinder does not exceed the bottom surface of the traction pin seat in the height direction; The second reinforcement ring is arranged on the inner wall of the third cylinder and is located in the interlayer space. The second reinforcement ring is used to strengthen the structural strength of the third cylinder.

[0005] In one embodiment, the edge of the first reinforcement ring facing away from the first cylinder is flush with the outer circumference of the third cylinder.

[0006] In one embodiment, the inner container includes an inner cylinder and inner heads provided at both ends of the inner cylinder, and the inner cylinder is a structure of equal diameter along the front-to-back direction; The interval distance between the first cylinder and the inner cylinder is smaller than the interval distance between the third cylinder and the inner cylinder.

[0007] In one of the embodiments, the length of the first cylinder in the front-rear direction is not more than one fifth of the length of the outer cylinder.

[0008] In one of the embodiments, the radial dimension of the second cylinder gradually increases from front to back.

[0009] In one of the embodiments, the first cylinder, the second cylinder and the third cylinder are coaxially arranged.

[0010] In one of the embodiments, the first reinforcing ring is a closed annular structure, or the first reinforcing ring is a segmented structure. The second reinforcing ring is a closed annular structure, or the second reinforcing ring is a segmented structure.

[0011] In one of the embodiments, the cryogenic tank truck comprises: The walking mechanism is arranged at the bottom of the third cylinder and close to the rear end of the third cylinder. The supporting leg is arranged at the bottom of the third cylinder and close to the front end of the third cylinder.

[0012] In one of the embodiments, the walking mechanism comprises a vehicle frame and a wheel set arranged at the bottom of the vehicle frame, and the vehicle frame is connected with the bottom of the third cylinder. The rear end of the vehicle frame exceeds the rear end of the tank body, and a containing space is formed between the rear end of the vehicle frame and the tank body. The cryogenic tank truck further comprises a rear box body, which is internally provided with a pipeline system of the tank body, and the rear box body is installed at the rear end of the vehicle frame and contained in the containing space.

[0013] In one of the embodiments, the cryogenic tank truck comprises a side guardrail arranged at the bottom of the third cylinder and between the walking mechanism and the supporting leg.

[0014] According to the above technical solution, the present application has at least the following advantages and positive effects: In the present application, the cryogenic tank truck comprises a tank body, a towing pin seat, a first reinforcing ring and a second reinforcing ring. The tank body comprises an outer container and an inner container, the outer container comprises an outer cylinder and an outer head, the outer cylinder comprises a first cylinder, a second cylinder and a third cylinder connected in sequence in the front-rear direction, and the radial dimension of the first cylinder is smaller than that of the third cylinder. The towing pin seat is arranged at the bottom of the first cylinder, and the bottom surface thereof protrudes downward beyond the bottom surface of the first cylinder. The first reinforcing ring is arranged on the outer wall of the first cylinder, and the first reinforcing ring at the bottom of the first cylinder does not exceed the bottom surface of the towing pin seat in the height direction. The second reinforcing ring is arranged on the inner wall of the third cylinder and located in the interlayer space.

[0015] By setting the radial dimension of the first cylinder smaller than the radial dimension of the third cylinder, on the one hand, the radial dimension of the front end of the tank body can be reduced to reduce the height of the tank truck, and on the other hand, the first reinforcing ring can be installed externally by using the space of the outer periphery of the first cylinder being recessed relative to the third cylinder, thereby enhancing the structural strength of the first cylinder while avoiding increasing the overall radial dimension of the outer periphery profile of the tank body, thereby facilitating control of the low height of the tank truck. Moreover, the first reinforcing ring located at the bottom of the first cylinder does not exceed the bottom surface of the traction pin seat in the height direction, that is, the first reinforcing ring can be arranged by using the spacing between the bottom surface of the traction pin seat and the bottom surface of the first cylinder, thereby avoiding increasing the height of the tank truck. Therefore, by such a configuration, the overall height of the tank truck can be reduced, thereby being able to reduce the center of gravity of the tank truck and improve the stability of the tank truck.

[0016] In addition, the radial dimension of the third cylinder can be set to a larger size, on the one hand, to ensure that the size of the interlayer space inside is not reduced, so as to ensure that the heat insulation performance of the tank body is good, and on the other hand, the second reinforcing ring can be installed by using the interlayer space, so as to improve the structural strength of the third cylinder, thereby improving the load-carrying capacity and deformation resistance of the tank body. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a low-temperature tank truck in the related art.

[0018] Figure 2 is a structural schematic diagram of a low-temperature tank truck according to an embodiment of the present application.

[0019] Figure 3 is Figure 2 is an enlarged schematic diagram of the low-temperature tank truck at A.

[0020] The reference signs are explained as follows: 10 - tank body; 11 - outer container; 111 - outer cylinder; 112 - outer head; 113 - first cylinder; 114 - second cylinder; 115 - third cylinder; 12 - inner container; 121 - inner cylinder; 122 - inner head; 13 - interlayer space; 20 - traction pin seat; 30 - first reinforcing ring; 40 - second reinforcing ring; 50 - running mechanism; 51 - vehicle frame; 52 - wheel set; 53 - containing space; 60 - support leg; 70 - rear box body; 80 - side guardrail. DETAILED DESCRIPTION

[0021] The features and advantages of the present application will become more apparent from the detailed description set forth below. It should be understood that the description and drawings are set forth as examples only and are not intended to limit the scope of the application.

[0022] In the description of the present application, it should be understood that the indication of direction or position relationship (such as up, down, left, right, front and back, etc.) in the embodiments shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the position of these elements changes, the indication of these directions also changes accordingly.

[0023] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] At present, in order to ensure that the tank car and the tractor seat cooperate smoothly, the ground clearance of the towing pin seat at the bottom of the tank car has a fixed range value. Generally speaking, referring to Figure 1 The height of the tank car 100 in the related art = the ground clearance L of the towing pin seat + the height h of the towing pin seat + the diameter D of the tank body. In order to meet the ground clearance requirement of the towing pin seat, plus the tank body needs to set a certain gap space between the inner and outer tank bodies to ensure its own thermal insulation performance, so that the height of the tank car is relatively high. In the case of full load medium in the tank body, the tank car has the risk of high gravity center and easy overturning.

[0025] Based on this, the present application provides a low-temperature tank car, which mainly improves the tank body structure to reduce the height of the tank car to a certain extent, so as to reduce the gravity center of the tank car and improve the driving safety.

[0026] Please refer to Figure 2 The low-temperature tank car (hereinafter referred to as tank car) of the embodiment of the present application includes a tank body 10, a towing pin seat 20, a first reinforcing ring 30 and a second reinforcing ring 40 arranged on the tank body 10, and a walking mechanism 50 and a supporting leg 60 arranged at the bottom of the tank body 10.

[0027] For the convenience of description and understanding, it is defined that the advancing direction of the low-temperature tank car is the front-rear direction, the vertical direction perpendicular to the front-rear direction is the up-down direction, and the horizontal direction perpendicular to the front-rear direction is the left-right direction.

[0028] As shown in Figure 2 The tank body 10 is a horizontal structure, and the axial extension direction is along the front-rear direction. The tank body 10 can include an outer container 11 and an inner container 12 arranged inside the outer container 11, and the inner container 12 can be used to store low-temperature medium such as liquefied natural gas (LNG).

[0029] The outer container 11 is arranged outside the inner container 12 and can play a role in protecting the inner container 12. The outer container 11 is arranged in a spaced manner with the inner container 12 and a sandwich space 13 is formed between the outer container 11 and the inner container 12. The sandwich space 13 can be arranged as a vacuum environment, and high-vacuum multi-layer thermal insulation material or the like can be wrapped on the inner container 12 to improve the thermal insulation performance of the tank body 10, reduce cold loss, and ensure stable storage of low-temperature medium in the inner container 12.

[0030] As shown in Figure 3 The outer container 11 can include an outer cylinder body 111 and outer heads 112 arranged at both ends of the outer cylinder body 111. The outer cylinder body 111 includes a first cylinder body 113, a second cylinder body 114, and a third cylinder body 115 connected in sequence along the front-rear direction. Optionally, the first cylinder body 113 can be a standard circular cylinder structure, that is, the first cylinder body 113 is an equal-diameter structure along the front-rear direction. For example, the diameter of the first cylinder body 113 can be D1.

[0031] Optionally, the third cylinder body 115 can be a standard circular cylinder structure, that is, the third cylinder body 115 is an equal-diameter structure along the front-rear direction. For example, the diameter of the third cylinder body 115 can be D2.

[0032] As shown in Figure 2 The radial dimension of the first cylinder body 113 is smaller than the radial dimension of the third cylinder body 115. That is, the diameter D1 of the first cylinder body 113 is smaller than the diameter D2 of the third cylinder body 115. By setting the diameter of the first cylinder body 113 to be smaller, the diameter of the front end of the tank body 10 can be reduced to reduce the height of the tank car. Since the diameter of the first cylinder body 113 is smaller than the diameter of the third cylinder body 115, the outer peripheral wall of the first cylinder body 113 is equivalent to being inwardly recessed by a certain distance relative to the outer peripheral wall of the third cylinder body 115, and this distance can be used as the arrangement space of the first reinforcing ring 30. Thus, the first reinforcing ring 30 can be installed externally using this arrangement space, which enhances the structural strength of the first cylinder body 113 while avoiding increasing the overall diameter of the outer peripheral contour of the tank body 10 due to the first reinforcing ring 30, thereby avoiding increasing the height of the tank car and facilitating control of the low height of the center of gravity of the tank car.

[0033] Meanwhile, the radial dimension of the third cylinder body 115 can be set to a larger size, on the one hand, to ensure the size of the interlayer space 13 inside it, so as to ensure the good heat insulation performance of the tank body 10. On the other hand, the interlayer space 13 can also be used to install the second reinforcing ring 40 to improve the structural strength of the third cylinder body 115.

[0034] As shown in Figure 2 , the second cylinder body 114 is used to transitionally connect the first cylinder body 113 and the third cylinder body 115. The diameter of the front end of the second cylinder body 114 can be equal to the diameter of the first cylinder body 113 to adapt to the connection of the first cylinder body 113. The diameter of the rear end of the second cylinder body 114 can be equal to the diameter of the third cylinder body 115 to adapt to the connection of the third cylinder body 115.

[0035] For example, the radial dimension of the second cylinder body 114 gradually increases from front to rear. That is, the second cylinder body 114 can be a generally conical cylinder structure, and the circumferential side wall thereof is in a horn shape expanding outward along the front-rear direction.

[0036] It can be understood that in other embodiments, the radial dimension of the second cylinder body 114 can also be segmented from front to rear. That is, the circumferential side wall of the second cylinder body 114 can be in a stepped shape along the front-rear direction, which can be set according to actual needs.

[0037] Referring to Figure 2 , in an embodiment, the first cylinder body 113, the second cylinder body 114 and the third cylinder body 115 are coaxially arranged. By coaxially arranging the first cylinder body 113, the second cylinder body 114 and the third cylinder body 115, the connection between the cylinder bodies can be smoother, the installation can be more convenient, and the overall stress of the outer container 11 of the tank body 10 can be uniform, thereby increasing the carrying capacity and anti-deformation capacity of the tank body 10.

[0038] Referring to Figure 2 , the inner container 12 includes an inner cylinder body 121 and inner heads 122 arranged at both ends of the inner cylinder body 121. The inner cylinder body 121 can be a standard circular cylinder structure, that is, the inner cylinder body 121 is in an equal-diameter structure along the front-rear direction.

[0039] In an embodiment, the spacing distance between the first cylinder 113 and the inner cylinder 121 is smaller than the spacing distance between the third cylinder 115 and the inner cylinder 121. Since the spacing distance between the first cylinder 113 and the inner cylinder 121 is small, when the first cylinder 113 is set as a cylinder structure with a smaller diameter, the original size of the inner cylinder 121 can be kept unchanged, which means that only the spacing distance of the interlayer space 13 between the first cylinder 113 and the inner cylinder 121 needs to be changed to make the radial size of the front end of the tank 10 smaller. The spacing distance of the interlayer space 13 between the third cylinder 115 with a larger diameter and the inner cylinder 121 can still keep the original larger spacing distance, so that the heat insulation performance of the tank 10 can be ensured not to be affected too much by the reduction of the diameter of the front end of the outer cylinder 111. At the same time, since the size of the inner cylinder 121 does not need to be changed, the volume of the inner container 12 can be ensured not to be reduced, which meets the demand of maximizing the operating efficiency of the tank car.

[0040] Referring to Figure 2 In an embodiment, in the front-rear direction, the length of the first cylinder 113 is not more than one fifth of the length of the outer cylinder 111. By setting the length of the first cylinder 113 to be small, the part of the tank 10 that needs to reduce the spacing distance of the interlayer space 13 can be short, so that the influence of the reduction of the diameter of the first cylinder 113 on the heat insulation performance of the tank 10 can be further reduced, and the heat insulation performance of the tank 10 can be ensured to be good.

[0041] Referring to Figure 2 As shown in the embodiment of the present application, the towing pin seat 20 is arranged at the bottom of the first cylinder 113, and the towing pin seat 20 is mainly used for connecting a towing vehicle to realize the moving and transporting function of the low-temperature tank car.

[0042] In the embodiment, the bottom surface of the towing pin seat 20 protrudes downward from the bottom surface of the first cylinder 113. That is, there is a certain height difference between the bottom surface of the towing pin seat 20 and the bottom surface of the first cylinder 113, and a spacing distance is formed therebetween. In the embodiment, the spacing distance between the bottom surface of the towing pin seat 20 and the bottom surface of the first cylinder 113 can be used as the arrangement space of the first reinforcing ring 30, so that the first reinforcing ring 30 at the bottom of the first cylinder 113 will not exceed the bottom surface of the towing pin seat 20 in height. Since the first reinforcing ring 30 at the bottom of the first cylinder 113 will not exceed the bottom surface of the towing pin seat 20, the height of the towing pin seat 20 does not need to be increased to avoid the interference between the external first reinforcing ring 30 and the external towing vehicle, so that the height of the tank car can be effectively controlled to be low, and the purpose of lowering the gravity center of the tank car can be achieved.

[0043] Referring to Figure 2As shown, in the embodiment of the present application, the first reinforcing ring 30 is arranged 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.

[0044] 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 in the height direction. By using the externally mounted first reinforcing ring 30, on the one hand, the first reinforcing ring 30 can be arranged using the space of the outer periphery of the first cylinder 113 relative to the third cylinder 115, avoiding increasing the overall diameter of the outer periphery of the tank body 10. On the other hand, the first reinforcing ring 30 can also be arranged using the spacing between the bottom surface of the traction pin seat 20 and the bottom surface of the first cylinder 113, avoiding increasing the height of the tank car. Thus, by such arrangement, the overall height of the tank car can be reduced, achieving the purpose of lowering the center of gravity of the tank car and improving the stability of the tank car.

[0045] For example, the ground clearance of the traction pin seat 20 usually has a fixed range value. For example, Figure 2 As shown, assuming that the ground clearance of the traction pin seat 20 is L1. At the same time, the traction pin seat 20 arranged at the bottom of the tank body 10 has a bottom surface that protrudes from the bottom surface of the tank body 10 by a height that usually follows the corresponding design specification. For example, Figure 2 and Figure 3 As shown, assuming that the height by which the bottom surface of the traction pin seat 20 protrudes from the bottom surface of the first cylinder 113 is L2.

[0046] Therefore, in the embodiment of the present application, the overall height of the tank car = the ground clearance of the traction pin seat L1 + the height of the traction pin seat L2 + the diameter D1 of the first cylinder 113. Since the first reinforcing ring 30 does not exceed the bottom surface of the traction pin seat 20 in the height direction, the external installation of the first reinforcing ring 30 does not increase the height of the tank car. Moreover, since the diameter D1 of the first cylinder 113 is reduced, while the size of the inner container 12 is not reduced (for example, the size of the inner container 12 can reach the maximum volume limit of the cryogenic tank car), the height of the tank car in the embodiment of the present application is lower than that of the tank car with the same volume in the related art, so that the center of gravity of the cryogenic tank car in the embodiment of the present application is lower, and the driving stability is higher.

[0047] Referring to Figure 2 In one embodiment, the edge of the first reinforcing ring 30 away from the first cylinder 113 is flush with the outer periphery of the third cylinder 115. In this embodiment, by arranging the edge of the first reinforcing ring 30 away from the first cylinder 113 to be flush with the outer periphery of the third cylinder 115, the overall outer diameter of the tank body 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 body 10 does not exceed the limit value specified by the standard due to the externally mounted first reinforcing ring 30.

[0048] As shown in Figure 2 and Figure 3 , assuming that the height of the first reinforcing ring 30 is H and the diameter of the third cylinder body 115 is D2, in the embodiment, D1+H=D2. Therefore, the overall height of the tank truck = the height L1 from the ground of the drawbar seat + the height L2 of the drawbar seat + the diameter D2 of the third cylinder body - the height H of the first reinforcing ring 30. That is, the height of the tank truck in the embodiment is lower than that of the tank truck with the same diameter tank in the related art, so that the center of gravity of the low-temperature tank truck in the embodiment is lower, and the driving stability is higher.

[0049] It can be understood that in other embodiments, the edge of the first reinforcing ring 30 away from the first cylinder body 113 can be lower than the outer periphery of the third cylinder body 115, as long as the first reinforcing ring 30 at the bottom of the first cylinder body 113 does not exceed the bottom surface of the drawbar seat 20.

[0050] Referring to Figure 2 , in the embodiment of the present application, the second reinforcing ring 40 is arranged on the inner wall of the third cylinder body 115 and located in the interlayer space 13, and the second reinforcing ring 40 is used to strengthen the structural strength of the third cylinder body 115. Wherein, the second reinforcing ring 40 can be welded to the inner wall of the third cylinder body 115.

[0051] In the present application, by adopting the second reinforcing ring 40 installed inside, the second reinforcing ring 40 can be arranged in the interlayer space 13 between the third cylinder body 115 and the inner cylinder body 121, so that the structural strength of the third cylinder body 115 can be improved without affecting the heat insulation performance of the tank body 10, thereby facilitating the improvement of the load-carrying capacity and deformation resistance of the tank body 10.

[0052] Wherein, 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.

[0053] Optionally, as shown in Figure 2 , the length of the second cylinder body 114 is much smaller than that of the first cylinder body 113. The second cylinder body 114 can not be provided with a reinforcing structure, so that the structure of the tank body 10 can be simplified, and the manufacturing difficulty and cost of the tank body 10 can be reduced.

[0054] Referring to Figure 2 , in one embodiment, the low-temperature tank truck comprises a running mechanism 50, which is arranged at the bottom of the third cylinder body 115 and close to the rear end of the third cylinder body 115. For example, the running mechanism 50 can comprise a vehicle frame 51 and a set of vehicle wheels 52 arranged at the bottom of the vehicle frame 51. Wherein, the vehicle frame 51 is connected with the bottom of the third cylinder body 115, and the vehicle frame 51 can be arranged in the front-rear direction.

[0055] As shown in Figure 2 the rear end of the frame 51 beyond the rear end of the tank body 10, and a receiving space 53 is formed between the rear end of the frame 51 and the tank body 10. The low-temperature tank vehicle further comprises a rear box body 70 in which the pipeline system of the tank body 10 is arranged. The rear box body 70 can be mounted at the rear end of the frame 51 and accommodated in the receiving space 53. Thus, due to the setting of the rear end of the frame 51 beyond the rear end of the tank body 10, the tank body 10 can be prevented from being directly impacted when the tank vehicle is rear-ended, and by mounting the rear box body 70 in which the pipeline system is arranged in the receiving space 53, the integrity of the rear box body 70 and the pipeline system inside the rear box body 70 can also be effectively ensured.

[0056] Referring to Figure 2 In an embodiment, the low-temperature tank vehicle further comprises a support leg 60 arranged at the bottom of the third cylinder body 115 and close to the front end of the third cylinder body 115. The support leg 60 can be provided in two, and the two support legs 60 can be symmetrically arranged on the left and right sides of the tank body 10. The support leg 60 is a telescopic support leg, and the bottom end of the support leg 60 extends downward to abut on the road surface, so that when the tank vehicle is in a non-driving state, the support leg 60 can assist in supporting the tank body 10 and the tank vehicle, thereby reducing the burden on the wheel set 52 and improving the stability of the whole vehicle. When the tank vehicle is driving, the bottom end of the support leg 60 can be retracted upward, so that the tractor can drive the tank body 10 to move, thereby realizing the transportation function of the tank vehicle.

[0057] As shown in Figure 2 In an embodiment, the low-temperature tank vehicle comprises a side guardrail 80 arranged at the bottom of the third cylinder body 115 and located between the walking mechanism 50 and the support leg 60. The side guardrail 80 can be provided in two, and the two side guardrails 80 can be symmetrically arranged on the left and right sides of the tank body 10. The side guardrail 80 can be arranged extending in the front-rear direction, which can play a protective role from the side to avoid other vehicles being rolled into the bottom of the tank vehicle when colliding, thereby ensuring the driving safety of the tank vehicle.

[0058] The low-temperature tank vehicle of the embodiment of the present application comprises a tank body, a towing pin seat, a first reinforcing ring and a second reinforcing ring. The tank body comprises an outer container and an inner container, and the outer container comprises an outer cylinder body and an outer head. The outer cylinder body comprises a first cylinder body, a second cylinder body and a third cylinder body which are connected in sequence along the front-rear direction, and the radial dimension of the first cylinder body is smaller than the radial dimension of the third cylinder body. The towing pin seat is arranged at the bottom of the first cylinder body, and the bottom surface of the towing pin seat protrudes downward beyond the bottom surface of the first cylinder body. The first reinforcing ring is arranged on the outer wall of the first cylinder body, and the first reinforcing ring at the bottom of the first cylinder body does not protrude beyond the bottom surface of the towing pin seat in the height direction. The second reinforcing ring is arranged on the inner wall of the third cylinder body and located in the interlayer space.

[0059] By setting the radial dimension of the first cylinder smaller than the radial dimension of the third cylinder, on the one hand, the radial dimension of the front end of the tank body can be reduced to reduce the height of the tank truck, and on the other hand, the first reinforcing ring can be installed outside by using the space of the outer periphery of the first cylinder being recessed relative to the third cylinder, thereby enhancing the structural strength of the first cylinder while avoiding increasing the overall diameter of the outer periphery profile of the tank body, thereby facilitating control of the low height of the tank truck. Moreover, the first reinforcing ring located at the bottom of the first cylinder does not exceed the bottom surface of the traction pin seat in the height direction, that is, the first reinforcing ring can be arranged by using the spacing between the bottom surface of the traction pin seat and the bottom surface of the first cylinder, thereby avoiding increasing the height of the tank truck. Therefore, by such a setting, the overall height of the tank truck can be reduced, thereby being able to reduce the center of gravity of the tank truck and improve the stability of the tank truck.

[0060] Moreover, since the tank body only reduces the diameter of the first cylinder at the position of the traction pin seat, although the gap of the inner interlayer space of the first cylinder is correspondingly reduced, the spacing of the inner interlayer space of the third cylinder, which occupies a large proportion in the length direction of the tank body, can still be set to a large gap. Therefore, the heat insulation performance of the tank body can be basically unaffected by the reduction of the diameter of the first cylinder, thereby ensuring good heat insulation performance of the tank body. In addition, since the tank body reduces the diameter of the front end portion by reducing the gap of the inner interlayer space of the first cylinder, the volume of the inner container can be ensured not to be reduced. Therefore, the low-temperature tank truck of the embodiments of the present application can achieve the purposes of reducing the height of the tank truck, reducing the center of gravity, and improving the stability of the vehicle while ensuring that the volume of the tank body is not reduced and the heat insulation performance of the tank body is not affected.

[0061] Furthermore, by setting the first reinforcing ring and the second reinforcing ring, the structural strength of the tank body can be improved, and the load-carrying capacity and the anti-deformation capacity of the tank body can be improved.

[0062] The above embodiments are only exemplary descriptions of structures, and the structures in the embodiments are not fixedly combined structures. In the absence of structural conflicts, the structures in the embodiments can be arbitrarily combined for use.

[0063] Although the present application has been described with reference to several exemplary embodiments, it will be understood that the terms used are illustrative and exemplary, and not restrictive. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be construed broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds, are therefore intended to be embraced by the appended claims.

Claims

1. A cryogenic tank truck, characterized in that: include: A tank body, the tank body comprising an outer container and an inner container disposed inside the outer container, the outer container and the inner container being spaced apart and forming an interlayer space therebetween, the outer container comprising an outer cylinder and outer heads disposed at both ends of the outer cylinder, wherein the outer cylinder comprises a first cylinder, a second cylinder, and a third cylinder sequentially connected in a front-to-rear direction, the radial dimension of the first cylinder being smaller than the radial dimension of the third cylinder; A traction pin seat, the traction pin seat is provided at the bottom of the first cylinder, the bottom surface of the traction pin seat protrudes downward from the bottom surface of the first cylinder, and a gap is formed between the two; a first reinforcement ring, the first reinforcement ring being arranged on the outer wall of the first cylinder, and the first reinforcement ring being located at the bottom of the first cylinder and not exceeding the bottom surface of the traction pin seat in the height direction; A second reinforcement ring is provided on the inner wall of the third cylinder and is located in the interlayer space. The second reinforcement ring is used to strengthen the structural strength of the third cylinder.

2. The cryogenic tank truck according to claim 1, characterized in that: An edge of the first reinforcement ring facing away from the first cylinder is flush with the outer circumference of the third cylinder.

3. The cryogenic tank truck according to claim 1, characterized in that: The inner container comprises an inner cylinder and inner heads provided at both ends of the inner cylinder, wherein the inner cylinder is of equal diameter along the front-to-back direction; The spacing distance between the first cylinder and the inner cylinder is smaller than the spacing distance between the third cylinder and the inner cylinder.

4. The cryogenic tank truck according to claim 1, characterized in that: 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 according to claim 1, characterized in that: The radial dimension of the second cylinder gradually increases from front to back.

6. The cryogenic tank truck according to claim 1, characterized in that: The first cylinder, the second cylinder and the third cylinder are coaxially arranged.

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

8. The cryogenic tank truck according to any one of claims 1 to 7, characterized in that: include: a walking mechanism, the walking mechanism being arranged at the bottom of the third cylinder and close to the rear end of the third cylinder; The supporting legs are arranged at the bottom of the third cylinder and close to the front end of the third cylinder.

9. The cryogenic tank truck according to claim 8, characterized in that: The walking mechanism includes a frame and a wheel set provided at the bottom of the frame, and the frame is connected to the bottom of the third cylinder; The rear end of the frame extends beyond the rear end of the tank body, and a receiving space is formed between the rear end of the frame and the tank body; The cryogenic tank truck further includes a rear box body having a built-in piping system of the tank body. The rear box body is mounted at the rear end of the vehicle frame and accommodated in the accommodation space.

10. The cryogenic tank truck according to claim 8, characterized in that: It includes side guardrails, which are arranged at the bottom of the third cylinder and located between the walking mechanism and the supporting legs.

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