Tank-type semitrailer and vehicle

Abstract

The tank type semitrailer comprises a frame, a tank body arranged on the frame, a valve piece and a fence, the valve piece is arranged at the top of the tank body in a protruding mode and used for loading media into the tank body, the fence is arranged at the top of the tank body, and the fence is arranged on the periphery of the valve piece and extends in the axial direction of the tank body. According to the structure, the fence can effectively protect the valve piece on the top of the tank body, impact of the ground on the valve piece when a vehicle turns over on one side is avoided, and therefore leakage of a medium in the tank body is avoided.

Description

Technical Field

[0001] This application relates to the field of semi-trailer technology, and in particular to a tank semi-trailer and a vehicle. Background Technology

[0002] Tank semi-trailers are mainly used for transporting liquids, bulk materials, and bulk cement, etc. They have high loading and unloading efficiency, can ensure the quality of goods, and are conducive to transportation safety.

[0003] Refined oil products are volatile, flammable, and explosive. Unreasonable vehicle structures and collisions, leaks, and groundings during transportation can easily lead to safety accidents. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a tank semi-trailer and vehicle, which aims to improve the structural strength of the tank semi-trailer.

[0005] Another objective of this application is to improve the impact resistance of tank semi-trailers.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application discloses a tank semi-trailer, including a frame and a tank body mounted on the frame. The semi-trailer also includes a valve and a guardrail. The valve protrudes from the top of the tank body and is used to load a medium into the tank body. The guardrail is located on the top of the tank body and surrounds the valve, extending along the axial direction of the tank body. The upper surface of the guardrail is not lower than the top of the valve.

[0008] In some embodiments of this application, the inner surfaces of the two side walls of the enclosure along the axial direction of the tank are respectively connected with reinforcing ribs. Multiple reinforcing ribs are arranged, and the multiple reinforcing ribs are distributed at intervals along the axial direction of the tank and are respectively connected to the outer wall of the tank.

[0009] In some embodiments of this application, the fence includes a first sidewall that extends radially along the tank body and is located near the front of the tank body, and the first sidewall is inclined from back to front.

[0010] In some embodiments of this application, the semi-trailer includes a protective member disposed at the rear end of the frame and protruding rearward from the rear end of the tank.

[0011] In some embodiments of this application, the semi-trailer includes a bracket, the bracket being configured with at least one, at least one of the brackets being distributed along the axial direction of the tank body, the bracket being disposed around the lower part of the outer periphery of the tank body, the bracket having a first arc surface, the first arc surface being connected to the outer peripheral surface of the tank body, and the arc length of the first arc surface being equal to or less than half of the outer periphery length of the tank body.

[0012] In some embodiments of this application, the semi-trailer includes a guardrail disposed on the top of the tank and located inside the fence. The guardrail extends axially along the tank and is rotatable upward along its fixed end to the fence to unfold the guardrail, or rotatable downward along its fixed end to the fence to fold the guardrail.

[0013] In some embodiments of this application, the guardrail includes a first mounting base, support rods, a crossbeam, and a driving component; the first mounting base is disposed on the inner sidewall of the guardrail; the support rods extend along the height direction, and the lower part of the support rods is rotatably connected to the mounting base; multiple support rods are arranged, and the multiple support rods are sequentially distributed along the axial direction of the tank; the crossbeams extend along the axial direction of the tank and are rotatably connected to the upper parts of the multiple support rods; the driving component is connected to the support rods, and the driving component can drive the support rods to rotate upward along their connection with the first mounting base to unfold the guardrail, or the driving component can drive the support rods to rotate downward along their connection with the first mounting base to fold the guardrail; and / or,

[0014] The guardrail also includes an elastic connector that extends along the extension direction of the crossbeam and is connected to at least the support rods located at both ends of the guardrail.

[0015] In some embodiments of this application, the tank body includes a partition plate and a wave deflector. The partition plate is disposed inside the tank body, and at least one partition plate is provided. At least one partition plate divides the interior of the tank body into independent compartments. The wave deflector is disposed inside the tank body, and at least one wave deflector is provided in each compartment.

[0016] In some embodiments of this application, the radial cross-section of the tank is elliptical.

[0017] In some embodiments of this application, the tank is made of stainless steel.

[0018] In some embodiments of this application, the front overhang length of the semi-trailer is less than 160cm.

[0019] Another aspect of this application provides a vehicle comprising a tractor and a tank semi-trailer as described in any of the preceding claims, the tractor being used to tow the tank semi-trailer.

[0020] Beneficial effects:

[0021] The tank semi-trailer provided in this application has a valve on the top of the tank for loading media into the tank. A fence is provided around the valve, and the upper surface of the fence is not lower than the top of the valve, so that when the vehicle overturns, the fence can effectively protect the valve and avoid the impact of the ground on the valve, thereby preventing the leakage of the media in the tank. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a vehicle provided according to one embodiment of this application.

[0023] Figure 2 This is a structural schematic diagram of a semi-trailer from a first-view perspective, provided as an embodiment of this application.

[0024] Figure 3 This is a structural schematic diagram of a semi-trailer from a second perspective, provided as an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the structure of a wave-damping plate provided in one embodiment of this application.

[0026] Figure 5 This is a structural schematic diagram of a semi-trailer from a third-person perspective, provided as an embodiment of this application.

[0027] Figure 6 This is a structural schematic diagram of a semi-trailer from a fourth-person perspective, provided as an embodiment of this application.

[0028] Figure 7 This is a structural schematic diagram of a semi-trailer from a fifth-person perspective, provided as an embodiment of this application.

[0029] Explanation of main component symbols: 100, semi-trailer; 200, tractor; 1, frame; 11, traveling mechanism; 2, tank body; 21, bulkhead; 22, wave deflector; 23, compartment; 3, valve; 4, fence; 41, first side wall; 42, second side wall; 43, third side wall; 44, fourth side wall; 45, protective space; 5, reinforcing rib; 6, protective component; 7, bracket; 71, first arc surface; 72, second mounting base; 8, guardrail; 81, first mounting base; 82, support rod; 83, crossbeam; 84, drive component; 85, elastic connector; 9, ladder; 10, loading and unloading pipeline; a, front overhang length. Detailed Implementation

[0030] This application provides a tank semi-trailer and a vehicle. To make the purpose, technical solution, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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 a specific orientational structure and operation. Therefore, they should not be construed as limitations on this application. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Tank semi-trailers are an important means of transporting refined oil products. Their excellent sealing performance reduces the risk of leakage. Refined oil products are volatile, flammable, and explosive; collisions during transport can easily compromise their safety.

[0034] Figure 1 This is a structural diagram of the vehicle provided in this application.

[0035] Please see Figure 1 This application provides a vehicle primarily used for transporting refined oil products. Specifically, the vehicle includes a tractor unit 200 and a tank semi-trailer 100. The tractor unit 200 is connected to the tank semi-trailer 100 via a transmission and is used to tow the tank semi-trailer 100.

[0036] In some embodiments, to reduce exhaust emissions and energy consumption, the tractor 200 may be an environmentally friendly vehicle, such as a hybrid or gas-powered vehicle.

[0037] like Figure 1As shown, the front overhang length 'a' of the semi-trailer refers to the distance from the center of the towing pin to the foremost point of the semi-trailer. The front overhang length 'a' of the tanker semi-trailer 100 is relatively short, making it compatible with most environmentally friendly vehicle models. Specifically, the front overhang length 'a' of the semi-trailer 100 is less than 160cm. For example, the front overhang length 'a' of the semi-trailer 100 can be, but is not limited to, 158cm, 159cm, 160cm, etc.

[0038] The shorter front overhang length 'a' of the semi-trailer 100 results in a shorter front turning radius for the tank 2. Vehicles with shorter front turning radii offer better maneuverability and handling, providing a significant advantage when navigating confined spaces. For example, they can move more flexibly in narrow streets, parking spaces, or complex traffic environments, reducing the risk of collisions and thus avoiding safety hazards caused by them.

[0039] Figure 2 This is a first-person view structural diagram of the semi-trailer provided in this application. Figure 3 This is a structural schematic diagram of the semi-trailer provided in this application from a second-view perspective.

[0040] like Figure 2 and Figure 3 As shown, specifically, the semi-trailer 100 includes a frame 1 and a tank 2 mounted on the frame 1. The frame 1 is equipped with a traveling mechanism 11, which is located at least at the rear of the frame 1 and is used to cooperate with the tractor 200 to enable the vehicle to move. Specifically, the traveling mechanism 11 includes multiple wheels, which are symmetrically arranged on opposite sides of the frame 1. To improve the vehicle's load-bearing capacity, the wheels can be arranged in groups of two or more.

[0041] like Figure 1 As shown, in some embodiments, the semi-trailer 100 includes a protective member 6, which is located at the rear end of the frame 1 and protrudes rearward from the rear end of the tank 2. The protective member 6 can be made of sheet metal with a yield strength of 1100 MPa and a tensile strength of 1300 MPa, so that the formed protective member 6 has high strength and can effectively reduce the impact force caused by rear-end collisions.

[0042] In some embodiments, the tank body 2 may be made of stainless steel. Stainless steel has excellent ductility and corrosion resistance, which can effectively improve the reliability of the finished oil transportation process and avoid leakage or seepage of the medium due to impact.

[0043] Figure 4 A schematic diagram of the wave deflector provided in this application.

[0044] like Figure 4 As shown, the radial cross-section of tank 2 is elliptical. The elliptical radial cross-section of tank 2 can lower the center of gravity of the semi-trailer 100 and improve the stability of the vehicle.

[0045] like Figure 2 As shown, the tank body 2 is equipped with a partition plate 21, and at least one partition plate 21 is provided. The partition plate 21 divides the interior of the tank body 2 into independent compartments 23. The tank body 2 is divided into independent compartments 23 by the partition plate 21, which reduces the capacity of each compartment 23, improves loading flexibility, and allows for the arrangement of loading plates and vehicle loading capacity according to transportation needs, thereby improving transportation efficiency.

[0046] like Figure 2 As shown, in some embodiments, the tank body 2 is provided with two partition plates 21, which are spaced apart, dividing the interior of the tank body 2 into three independent compartments 23. The partition plates 21 can divide the tank body 2 into compartments 23 of the same capacity, or they can divide the tank body 2 into compartments 23 of different capacities. Generally, dividing the tank body 2 of the semi-trailer 100 into three independent compartments 23 can not only meet the needs of different loading types, but also meet general loading volume requirements.

[0047] like Figure 2 and Figure 4 As shown, the tank body 2 is equipped with baffles 22. The baffles 22 can be distributed in each independent compartment 23, which can enhance the structural strength of the tank body 2 and improve the stability during transportation.

[0048] In some embodiments, each compartment 23 is provided with two wave deflectors 22. The two wave deflectors 22 are spaced apart along the axial direction of the tank body 2 to improve the uniformity of strength at various points along the axial direction of the tank body 2.

[0049] The baffle 22 can be made of stainless steel. Stainless steel has high chemical stability, which can reduce the corrosion of the baffle 22 by the medium, thereby extending the service life of the tank 2.

[0050] The baffle plate 22 is provided with multiple through holes, which are staggered. These through holes extend through both sides of the baffle plate 22 along the axial direction of the tank body 2. When the finished oil sloshes inside the tank body 2, it can flow from one side of the baffle plate 22 to the other side through the through holes, thereby effectively reducing the waves generated by the back-and-forth movement of the finished oil, reducing the impact force of the finished oil on the tank body 2, and preventing the collision and friction between the finished oil and the tank body 2 to generate static electricity that could lead to an explosion.

[0051] The baffle plate 22 can be welded to the inner wall of the tank 2 to ensure the stability of the connection between the baffle plate 22 and the tank 2.

[0052] like Figure 2 and Figure 3 As shown, the semi-trailer 100 includes a valve 3. The valve 3 protrudes from the top of the tank 2 and is sealed by a valve cover for loading media into the tank 2.

[0053] like Figure 2 and Figure 3 As shown, the semi-trailer 100 includes a guardrail 4. The guardrail 4 is located on the top of the tank body 2, surrounds the valve 3, and extends along the axial direction of the tank body 2. The upper surface of the guardrail 4 is not lower than the top of the valve 3. When the vehicle overturns, the guardrail 4 can effectively protect the valve 3, preventing the ground from impacting the valve 3 and causing media leakage.

[0054] Figure 5 A structural schematic diagram of the semi-trailer provided in this application from a third-person perspective; Figure 6 This is a structural schematic diagram of the semi-trailer provided in this application from a fourth-person perspective.

[0055] like Figure 5 and Figure 6 As shown, in some embodiments, the enclosure 4 includes a first sidewall 41, a second sidewall 42, a third sidewall 43, and a fourth sidewall 44, which are connected sequentially to enclose a protective space 45. The first sidewall 41 and the third sidewall 43 extend radially along the tank body 2, while the second sidewall 42 and the fourth sidewall 44 extend axially along the tank body 2.

[0056] In some embodiments, the inner surface of the second sidewall 42 is provided with reinforcing ribs 5.

[0057] In other embodiments, the inner surface of the fourth sidewall 44 is provided with reinforcing ribs 5.

[0058] In some other embodiments, the inner surfaces of the second sidewall 42 and the fourth sidewall 44 are provided with reinforcing ribs 5.

[0059] Reinforcing ribs 5 are provided on the inner side of the second side wall 42 or the fourth side wall 44 to improve the axial strength of the fence 4 and ensure the protection of the valve 3 at the top of the tank 2 by the fence 4.

[0060] In some embodiments, multiple reinforcing ribs 5 are provided, and the multiple reinforcing ribs 5 are distributed at intervals along the axial direction of the tank body 2 and are respectively connected to the outer wall of the tank body 2 to enhance the connection strength between the fence 4 and the tank body 2.

[0061] like Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the first sidewall 41 is close to the front of the tank body 2, the first sidewall 41 is inclined from back to front, and the lower end of the first sidewall 41 is further forward than the upper end.

[0062] The first sidewall 41 is located on the windward side of the vehicle. Setting the first sidewall 41 as an inclined surface can effectively reduce wind resistance, thereby reducing the vehicle's fuel consumption and carbon emissions.

[0063] Figure 7 This is a structural schematic diagram of the semi-trailer provided in this application from a fifth-person perspective.

[0064] like Figure 1 , Figures 5 to 7 As shown, in some embodiments, the semi-trailer 100 includes a bracket 7. The bracket 7 surrounds the lower part of the outer periphery of the tank body 2, and the bracket 7 has a first arc surface 71, which is connected to the outer peripheral surface of the tank body 2. The bracket 7 provides effective support for the tank body 2, improving the load-bearing capacity of the tank body 2. The side of the bracket 7 connected to the tank body 2 is set as an arc surface, and the first arc surface 71 can better fit with the outer peripheral surface of the tank body 2, improving the load-bearing effect of the bracket 7 on the tank body 2.

[0065] like Figure 1 , Figure 6 and Figure 7 As shown, a second mounting seat 72 is provided at the bottom of the bracket 7. The second mounting seat 72 is threadedly connected to the frame 1, which enables the tank 2 to be quickly positioned on the frame 1.

[0066] In some embodiments, the arc length of the first arc surface 71 is equal to half the outer perimeter of the tank body 2. The two ends of the bracket 7 extend to the radial center of the tank body 2, so that the bracket 7 not only has sufficient load-bearing capacity for the tank body 2, but also reduces the weight of the entire vehicle and reduces transportation costs.

[0067] In other embodiments, the arc length of the first arc surface 71 is less than half the outer perimeter of the tank body 2. The top of the bracket 7 is not higher than the radial center of the tank body 2.

[0068] One or more brackets 7 can be configured. When multiple brackets 7 are configured, the multiple brackets 7 are distributed sequentially and at intervals along the axial direction of the tank body 2 to ensure the uniformity of the load-bearing force of the brackets 7 on all parts of the tank body 2 along the axial direction.

[0069] like Figure 1 and Figure 6 As shown, the semi-trailer 100 includes a guardrail 8. The guardrail 8 is located on top of the tank 2. It is understood that the guardrail 8 has sufficient height to ensure the safety of working on top of the tank 2 during inspection and maintenance.

[0070] The guardrail 8 extends along the axial direction of the tank body 2, ensuring that when staff inspect and maintain the top of the tank body 2, they can be protected by the guardrail 8 along the axial direction of the tank body 2.

[0071] The top of the tank body 2 is equipped with multiple valves 3, and each independent compartment 23 is equipped with a corresponding valve 3. The two ends of the guardrail 8 extend to the valves 3 located at the front and rear ends of the tank body 2 to ensure the safety of operations on the top of the tank.

[0072] The guardrail 8 can rotate upward along its fixed end with the fence 4 to unfold it; or the guardrail 8 can rotate downward along its fixed end with the fence 4 to fold it. When maintenance is required on the top of the tank 2, the guardrail 8 rises to ensure the safety of operations on the tank top. When maintenance is not required on the top of the tank 2, the guardrail 8 rotates downward along its fixed end to fold it down, reducing wind resistance generated by the guardrail 8 during driving and improving vehicle stability and safety.

[0073] In some embodiments, the guardrail 8 is located inside the fence 4, and the guardrail 8 can be hidden inside the fence 4 when folded, so that the fence 4 provides a certain degree of protection for the guardrail 8 when folded.

[0074] In some embodiments, the guardrail 8 includes a first mounting base 81, support rods 82, a crossbeam 83, and a driving member 84. The first mounting base 81 is disposed on the inner sidewall of the enclosure 4. The support rods 82 extend along the height direction, and the lower part of the support rods 82 is rotatably connected to the first mounting base 81. Multiple support rods 82 are arranged, and the multiple support rods 82 are distributed sequentially at intervals along the axial direction of the tank body 2. The crossbeam 83 extends along the axial direction of the tank body 2 and is rotatably connected to the upper part of each of the multiple support rods 82. The driving member 84 is connected to the support rods 82. The driving member 84 can drive the support rods 82 to rotate along their connection with the first mounting base 81, and the support rods 82 can rotate along their connection with the crossbeam 83. When the driving member 84 drives the support rods 82 to rotate upward along their connection with the first mounting base 81, the guardrail 8 unfolds upward; when the driving member 84 drives the support rods 82 to rotate downward along their connection with the first mounting base 81, the guardrail 8 folds downward.

[0075] The driving component 84 can be an electric actuator, etc. When the guardrail 8 is unfolded, the electric actuator extends, pushing the support rod 82 perpendicular to the top of the tank 2. When the guardrail 8 needs to be folded, the electric actuator retracts, and the support rod 82 rotates along its connection with the first mounting base 81, and the upper end of the support rod 82 rotates along its connection with the crossbeam 83, so that the guardrail 8 folds inside the enclosure 4. It is understood that the distance between two adjacent support rods 82 is greater than the length of the support rod 82 to ensure that the support rod 82 can rotate to a horizontal position.

[0076] The vehicle includes a vehicle controller (not shown in the figure), and the drive unit 84 is electrically connected to the vehicle controller, so that the guardrail 8 can be automatically raised and unfolded or automatically folded, thereby improving operational safety.

[0077] The guardrail 8 also includes an elastic connector 85, which extends along the extension direction of the crossbeam 83. The elastic connector 85 is connected to the support rods 82 located at both ends of the guardrail 8, thereby improving the structural strength of the guardrail 8 to a certain extent.

[0078] like Figure 1As shown, the semi-trailer 100 may also include a loading and unloading pipeline 10. Each independent compartment 23 of the tank 2 is equipped with a loading and unloading pipeline 10 to ensure that the medium in each independent compartment 23 can be discharged independently.

[0079] The loading / unloading pipeline 10 can adopt standard specifications, namely, the pipeline control system is equipped with an oil-water separator, and the loading / unloading pipeline 10 is equipped with API (American Petroleum Institute) valves. The manufacturer's standard distance between the center of the API valve and the valve is 350mm, the manufacturer's standard distance between the center of the API valve and the top of the housing is 380mm, the manufacturer's standard distance between the center of the API valve and the side of the housing is 250mm, and the manufacturer's standard distance between the outer end face of the API valve and the housing is 180mm, improving the uniformity of the structure. In addition, for the special needs of different regions, the loading / unloading pipeline 10 can also be equipped with an electronic lead seal in the middle section of the API valve.

[0080] like Figure 1 and Figure 7 As shown, the semi-trailer 100 also includes a ladder 9 that extends to the upper part of the tank 2 to facilitate maintenance of the top of the tank 2.

[0081] In some embodiments, the ladder 9 may include a vertical section and an inclined section, which can not only reduce the inclination of the ladder 9 but also reduce the obstruction of the tank 2 by the ladder 9.

[0082] Specifically, the ladder 9 is located at the rear end of the tank 2, and there is a certain gap between the middle of the ladder 9 and the tank 2, which can reduce the impact of a rear-end collision on the tank 2 to a certain extent.

[0083] In summary, this application improves the safety of transporting refined oil products by installing a fence around the top of the tank, with the fence positioned around the valve and its height not lower than that of the valve. This fence protects the valve from contact with the ground when the vehicle overturns, preventing the valve from contacting the ground and thus avoiding impact that could cause leakage of the medium inside the tank.

[0084] In addition, a guardrail is installed on the top of the tank to improve the safety of tank top maintenance. The guardrail can be unfolded when the tank top is being maintained and folded inside the fence when the tank top is not being maintained, which improves driving stability and safety and reduces damage to the fence during driving.

[0085] The installation of brackets and internal partitions in the tank improves the strength of the tank and the load-bearing capacity of the vehicle, thereby increasing transportation efficiency.

[0086] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of this application, and all such substitutions or changes should fall within the protection scope of the appended claims.

Claims

1. A tank semi-trailer, comprising a frame and a tank mounted on the frame, characterized in that, The semi-trailer also includes: A valve protrudes from the top of the tank and is used to load a medium into the tank. A fence is provided on the top of the tank body, the fence surrounds the valve and extends along the axial direction of the tank body, and the upper surface of the fence is not lower than the top of the valve.

2. The tank semi-trailer according to claim 1, characterized in that, The fence is connected to the inner surfaces of the two side walls along the axial direction of the tank with reinforcing ribs. Multiple reinforcing ribs are arranged and distributed at intervals along the axial direction of the tank, and are respectively connected to the outer wall of the tank.

3. The tank semi-trailer according to claim 2, characterized in that, The enclosure includes a first sidewall that extends radially along the tank and is located near the front of the tank. The first sidewall is inclined from back to front.

4. The tank semi-trailer according to claim 1, characterized in that, The semi-trailer includes: The protective component is located at the rear end of the vehicle frame and protrudes rearward from the rear end of the tank body.

5. The tank semi-trailer according to claim 1, characterized in that, The semi-trailer includes: The bracket is provided with at least one, and at least one of the brackets is distributed along the axial direction of the tank body. The bracket is arranged around the lower part of the outer periphery of the tank body. The bracket has a first arc surface connected to the outer peripheral surface of the tank body, and the arc length of the first arc surface is equal to or less than half of the outer periphery of the tank body.

6. The tank semi-trailer according to claim 1, characterized in that, The semi-trailer includes: A guardrail is provided on the top of the tank and located inside the fence. The guardrail extends along the axial direction of the tank. The guardrail can rotate upward along its fixed end with the fence to unfold the guardrail, or the guardrail can rotate downward along its fixed end with the fence to fold the guardrail.

7. The tank semi-trailer according to claim 6, characterized in that, The guardrail includes: The first mounting base is located on the inner wall of the fence; A support rod extends along the height direction, and the lower part of the support rod is rotatably connected to the mounting base. Multiple support rods are provided, and the multiple support rods are distributed sequentially along the axial direction of the tank. A crossbeam extends along the axial direction of the tank body and is rotatably connected to the upper part of each of the multiple support rods; A driving element, connected to the support rod, is capable of rotating the support rod upwards along its connection with the first mounting base to unfold the guardrail; or the driving element is capable of rotating the support rod downwards along its connection with the first mounting base to fold the guardrail; and / or, An elastic connector extends along the extension direction of the crossbeam and is connected to at least the support rods located at both ends of the guardrail.

8. The tank semi-trailer according to claim 1, characterized in that, The tank includes: A partition plate is provided inside the tank body, and at least one partition plate is provided, which divides the interior of the tank body into independent compartments; A wave deflector is installed inside the tank, and at least one wave deflector is installed in each of the compartments.

9. The tank semi-trailer according to claim 1, characterized in that, The radial cross-section of the tank is elliptical.

10. The tank semi-trailer according to any one of claims 1 to 9, characterized in that, The tank is made of stainless steel.

11. The tank semi-trailer according to claim 1, characterized in that, The front overhang of the semi-trailer is less than 160cm.

12. A vehicle, characterized in that, The vehicle includes a tractor unit and a tank semi-trailer as described in any one of claims 1 to 11, wherein the tractor unit is used to tow the tank semi-trailer.

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