Container for storing and transporting liquid materials

Abstract

A container for storing and transporting liquid materials. The container comprises a front end wall, a rear end wall, a left side wall and a right side wall, wherein at least one of the two end walls and the two side walls comprises a corrugated panel, which extends in a vertical direction. The value range of the wave depth of at least one wave of the corrugated panel is [50, 100] mm, and the panel thickness of the corrugated panel at the at least one wave is greater than or equal to 2.6 mm.

Description

Containers for storing and transporting liquid materials

[0001] This application claims priority to Chinese patent application No. CN 202420524532.4, filed on March 18, 2024, entitled “Container for Storing and Transporting Liquid Materials,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of containers, and in particular to a container for storing and transporting liquid materials. Background Art

[0003] Currently, in international multimodal transport, liquids are mostly transported in tank containers. Because liquid transport requires relatively high strength, tank container designs are more likely to meet these requirements. However, this design compromises the internal volume. Ordinary square containers, on the other hand, have a larger internal volume, but their strength design is very difficult to meet for liquid transport. Summary of the Invention

[0004] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention of this disclosure is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially address the above-mentioned issues, the present disclosure provides a container for storing and transporting liquid materials. The container includes front and rear end walls and left and right side walls. At least one of the end walls and the side walls comprises a corrugated plate. The corrugated plate extends vertically, wherein the depth of at least one wave of the corrugated plate ranges from 50 to 100 mm, and the thickness of the corrugated plate at the at least one wave is greater than or equal to 2.6 mm.

[0006] Optionally,

[0007] The wave depth of the at least one wave is in the range of [50, 80] mm; and / or

[0008] The plate thickness at the at least one wave has a value range of [2.6, 4] mm.

[0009] Optionally, the wave depth of all waves of the corrugated plate ranges from [50, 100] mm.

[0010] Optionally,

[0011] The two end walls and the two side walls are both constructed of the corrugated plate; and / or

[0012] In a cross section of the corrugated plate, the planar dimensions of the convex waves and the concave waves of the corrugated plate are the same or different.

[0013] Optionally,

[0014] The corrugated plate includes a crest portion, a trough portion, and a connecting portion. The crest portions and the trough portions are alternately arranged, and the connecting portion connects the crest portions and the trough portions.

[0015] In the cross section of the corrugated plate, the intersection angle between the connecting portion and the crest portion is non-right angle or right angle, and the intersection angle between the connecting portion and the trough portion is non-right angle or right angle.

[0016] Optionally, the wave depth of the corrugated plate used for the end wall is consistent with or inconsistent with the wave depth of the corrugated plate used for the side wall.

[0017] Optionally, the plate thickness of the corrugated plate used for the end wall is consistent with or inconsistent with the plate thickness of the corrugated plate used for the side wall.

[0018] Optionally, the corrugated plates used for the same end wall or side wall have consistent or inconsistent wave depths.

[0019] Optionally, the corrugated plates used for the same end wall or the same side wall may have the same or different plate thicknesses.

[0020] Optionally, the container further includes:

[0021] at least one wave-breaking plate, the wave-breaking plate being arranged in the interior space of the container and extending perpendicularly to the length direction of the container; and / or

[0022] Reinforcing ribs are provided on the inner surface of the end wall and / or the side wall.

[0023] Optionally, the container further includes:

[0024] a thermometer for detecting the temperature of the liquid inside the container, the thermometer being mounted on an outer wall of the container; and

[0025] A heating pipe is used to contain a heating liquid. The heating pipe is arranged in the inner space of the container, and an inlet and an outlet of the heating pipe are connected to the outer wall of the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings of the present disclosure are incorporated herein as part of the present disclosure for understanding the present disclosure. The drawings show representative embodiments of the present disclosure and are used to explain the principles of the present disclosure rather than to limit the present disclosure.

[0027] In the attached figure:

[0028] FIG1 is a schematic diagram of a container according to an embodiment of the present disclosure;

[0029] FIG2 is an exploded perspective view of a container according to an embodiment of the present disclosure;

[0030] FIG3 is a schematic side view of the container shown in FIG2 ;

[0031] FIG4 is a schematic cross-sectional view along line AA of FIG3 ;

[0032] FIG. 5 is an enlarged schematic diagram of portion B in FIG. 4 .

[0033] Explanation of reference numerals: 10: corner column 11: top plate 12: floor 13: left side wall 14: right side wall 15: front end wall 16: rear end wall 17A: bottom side beam 17B: top side beam 18A: bottom end beam 18B: top end beam 19: internal space 20: wave-breaking plate 21: third opening or third notch 40: heating pipe 401: inlet 52: thermometer 61: first through hole 62: second through hole 70: ventilation device 71: manhole 72: discharge port 80: corrugated plate 81: convex wave 82: concave wave 83: wave crest 84: wave trough 85: connecting portion 100: container DCD: corrugation depth direction DCL: corrugation length direction DCW: corrugation width direction DD: wave depth DH: container height direction DL: container length direction DT: plate thickness DW: container width direction A1: first axis of symmetry A2: second axis of symmetry DETAILED DESCRIPTION

[0034] In the following description, a number of specific details are provided to provide a more thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure may be practiced without one or more of these details. In other examples, some technical features well known in the art are not described to avoid confusion with the present disclosure.

[0035] In order to thoroughly understand the present disclosure, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present disclosure thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present disclosure is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present disclosure are described in detail below, but in addition to these detailed descriptions, the present disclosure may also have other embodiments.

[0036] Ordinal numbers such as "first" and "second" used in this disclosure are merely identifiers and do not convey any other meaning, such as a specific order. Furthermore, for example, the term "first component" itself does not imply the existence of a "second component," nor does the term "second component" itself imply the existence of a "first component." The use of terms such as "first," "second," and "third" does not indicate any order, and these terms should be interpreted as names.

[0037] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this disclosure are for illustrative purposes only and are not limiting.

[0038] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0039] Unless otherwise stated, numerical ranges herein include not only the entire range between its two endpoints but also the several sub-ranges contained therein.

[0040] The present disclosure provides a container for storing and transporting liquid materials.

[0041] Now, exemplary embodiments according to the present disclosure will be described in more detail with reference to the accompanying drawings.

[0042] As shown in Figures 1 and 2, in a specific embodiment, a square container 100 can be used to store and transport liquid materials. In this disclosure, the container 100 may also be referred to as a square box 100. With the same length, width, and height dimensions, a square box has a larger volume than a round tank container.

[0043] The container 100 comprises a rectangular frame formed by connecting a plurality of beams (two bottom side beams 17A, two top side beams 17B, two bottom end beams 18A, and two top end beams 18B) with four corner posts 10. A roof panel 11, floor panel 12, left side wall 13, right side wall 14, front end wall 15, and rear end wall 16 are mounted to this frame. The roof panel 11 and floor panel 12 are spaced apart along the height direction DH of the container 100. The left side wall 13 and right side wall 14 are spaced apart along the width direction DW of the container 100. The front end wall 15 and rear end wall 16 are spaced apart along the length direction DL of the container 100. The corner posts 10 extend vertically, and the left side wall 13, right side wall 14, front end wall 15, and rear end wall 16 all extend in a vertical plane, giving the container 100 a generally rectangular parallelepiped structure. The roof panel 11, floor panel 12, left side wall 13, right side wall 14, front end wall 15, and rear end wall 16 collectively enclose an interior space 19 of the container 100. The interior space 19 is used to accommodate materials (cargo), particularly liquid materials. The roof 11, floor 12, left side wall 13, right side wall 14, front end wall 15, and rear end wall 16 are also outer walls of the container 100. The left side wall 13, right side wall 14, front end wall 15, and rear end wall 16 are also referred to as walls of the container 100.

[0044] The top panel 11 is provided with a manhole 71 for personnel to pass through and also serves as a feed inlet (liquid materials flow into the interior space 19 through manhole 71). Manhole 71 is typically covered. The rear wall 16 is provided with a discharge port 72, through which liquid materials flow out of the interior space 19. Discharge port 72 is typically provided with a discharge valve. When the discharge valve is opened, discharge port 72 is opened. A cover can also be provided to prevent the discharge valve from being accidentally touched. The top panel 11 is also provided with a venting device 70 for ventilating the interior space 19 to the outside environment. The venting device 70 can be, for example, a valve. When the valve is opened, the interior space 19 is connected to the outside environment. To discharge materials, the venting device 70 is first operated to ventilate the interior space 19 to maintain a uniform air pressure. The discharge valve is then opened, allowing air to continuously enter the interior space 19, thereby equalizing the pressure inside and outside the container 100. This prevents deformation of the outer wall of the container 100 due to the pressure imbalance.

[0045] To reduce surges caused by liquid during transportation, at least one wave-breaking plate 20 is provided inside the container 100. The wave-breaking plate 20 is generally perpendicular to the longitudinal direction DL of the container 100, that is, generally parallel to the front wall 15 and the rear wall 16. As shown in Figure 2, the container 100 may include multiple wave-breaking plates 20, which are spaced apart along the longitudinal direction DL of the container 100. The wave-breaking plates 20 divide the internal space 19 into several smaller spaces, so that the liquid in the internal space 19 can basically only surge in the smaller space between two adjacent wave-breaking plates 20, thereby reducing surges and improving the safety factor. Optionally, the wave-breaking plates 20 are provided with a third opening or third gap 21 for personnel to pass through.

[0046] The container 100 is also provided with a thermometer 52 and a heating pipe 40. The temperature of certain liquid materials needs to be maintained within an appropriate temperature range. The thermometer 52 is used to detect the temperature of the liquid. The thermometer 52 is installed, for example, on the rear end wall 16. The heating pipe 40 is arranged in the internal space 19 to accommodate the heating liquid. When the sensing value of the thermometer 52 shows that the temperature of the liquid in the internal space 19 is too low, the heating pipe 40 is connected to an external device so that high-temperature liquid flows through the inside of the heating pipe 40, thereby heating the liquid material in the internal space 19. The heating pipe 40 is installed, for example, on the floor 12. The rear end wall 16 is provided with a first through hole 61 and a second through hole 62, which are respectively connected to the inlet 401 and the outlet of the heating pipe 40 (for example, respectively accommodating the two ends of the heating pipe 40). The thermometer 52, the first through hole 61 and the second through hole 62 can also be arranged at other positions on the outer wall of the container 100.

[0047] In order to reduce the gross weight of the container 100 while ensuring the strength of the outer walls, as shown in Figures 3 and 4 , at least one of the front and rear end walls (15 and 16) and the left and right side walls (13 and 14) optionally includes a corrugated sheet 80. The corrugated sheet 80 extends in the vertical direction. Optionally, all of the front and rear end walls (15 and 16) and the left and right side walls (13 and 14) are constructed using the corrugated sheet 80. The two end walls (15 and 16) are supported by two bottom end beams 18A, respectively. The two side walls (13 and 14) are supported by two bottom side beams 17A, respectively. The two bottom end beams 18A and the two bottom side beams 17A can be collectively referred to as the bottom beam of the container 100. Therefore, the corrugated sheet 80 is supported by the bottom beam, or in other words, the bottom of the corrugated sheet 80 is connected to the bottom beam, for example, to the upper surface of the bottom beam. The top of the corrugated sheet 80 is connected to a roof beam (eg, roof side beam 17B and / or top end beam 18B) of the container 100 , such as a lower surface of the roof beam.

[0048] As shown in Figure 5, the corrugated sheet 80 includes a plurality of convex waves 81 and a plurality of concave waves 82, which are arranged alternately. The convex waves 81 and concave waves 82 are also referred to as the waves of the corrugated sheet 80. In this disclosure, the convex waves 81 and concave waves 82 are defined from the perspective of viewing the corrugated sheet 80 from the interior space 19. The portions protruding toward the interior space 19 are convex waves 81, and the portions protruding toward the exterior of the container 100 are concave waves 82. The corrugated sheet 80 has a wavy appearance, including alternating crests 83 and troughs 84, and connecting portions 85 connecting adjacent crests 83 and troughs 84. A crest 83 and its two connecting portions 85 constitute a convex wave 81. A trough 84 and its two connecting portions 85 constitute a concave wave 82. The convex waves 81 and concave waves 82 are arranged in the corrugation width direction DCW. The convex waves 81 and concave waves 82 extend in the corrugation length direction DCL. The corrugated plate 80 has a corrugated depth direction DCD. Optionally, the corrugated width direction DCW, the corrugated length direction DCL, and the corrugated depth direction DCD are perpendicular to each other.

[0049] To enhance the strength of the corrugated sheet 80, the wave depth DD of at least one wave (convex wave 81 or concave wave 82) of the corrugated sheet 80 is 50 mm to 100 mm, and the thickness DT of the corrugated sheet 80 at that wave is greater than or equal to 2.6 mm. Thus, the strength of the corrugated sheet 80 is ensured by the combination of wave depth and sheet thickness.

[0050] Optionally, the corrugated plate 80 has a corrugation depth DD of at least one wave of 50 mm to 80 mm, and a plate thickness DT of the corrugated plate 80 at the wave is greater than or equal to 2.6 mm.

[0051] Optionally, the wave depth DD of at least one wave of the corrugated plate 80 is 50 mm to 100 mm, and the plate thickness DT of the corrugated plate 80 at the wave is greater than or equal to 2.6 mm and less than or equal to 4 mm.

[0052] Optionally, the corrugated plate 80 has a wave depth DD of 50 mm to 80 mm at least one wave, and a plate thickness DT of the corrugated plate 80 at the wave is greater than or equal to 2.6 mm and less than or equal to 4 mm.

[0053] The at least one wave of the corrugated plate 80 may be a wave of the corrugated plate 80 of any one of the front wall 15, the rear wall 16, the left wall 13, and the right wall 14. Alternatively, each of the front wall 15, the rear wall 16, the left wall 13, and the right wall 14 may include at least one wave that meets the dual requirements of the wave depth DD and the plate thickness DT.

[0054] Optionally, the corrugated plate 80 has a corrugation depth DD of all the waves of 50 mm to 100 mm, and a plate thickness DT of the corrugated plate 80 is greater than or equal to 2.6 mm.

[0055] Optionally, the corrugated plate 80 has a corrugation depth DD of all the waves of 50 mm to 80 mm, and a plate thickness DT of the corrugated plate 80 is greater than or equal to 2.6 mm.

[0056] Optionally, the wave depth DD of all waves of the corrugated plate 80 is 50 mm to 100 mm, and the plate thickness DT of the corrugated plate 80 is greater than or equal to 2.6 mm and less than or equal to 4 mm.

[0057] Optionally, the corrugated plate 80 has a corrugated depth DD of all the waves of 50 mm to 80 mm, and a plate thickness DT of the corrugated plate 80 of 2.6 mm or more and 4 mm or less.

[0058] All corrugated sheets 80 of the container 100 may be of uniform specifications or may be spliced ​​together using sheets of different specifications. For example, while ensuring sufficient strength, corrugated sheets of different corrugation depths and / or thicknesses may be used to splice together the outer wall to achieve the goals of reducing weight, lowering costs, and reducing process steps.

[0059] For example, the corrugated sheet 80 used for the end wall (15 or 16) may have the same or different specifications as the corrugated sheet 80 used for the side wall (13 or 14). Specifically, the wave depth DD of the corrugated sheet 80 used for the end wall (15 or 16) may have the same or different specifications as the corrugated sheet 80 used for the side wall (13 or 14). Alternatively, the plate thickness DT of the corrugated sheet 80 used for the end wall (15 or 16) may have the same or different specifications as the plate thickness DT of the corrugated sheet 80 used for the side wall (13 or 14). For example, the wave depth DD of the corrugated sheet 80 used for the end wall (15 or 16) may be greater than the wave depth DD of the corrugated sheet 80 used for the side wall (13 or 14). For another example, the plate thickness DT of the corrugated sheet 80 used for the end wall (15 or 16) may be greater than the plate thickness DT of the corrugated sheet 80 used for the side wall (13 or 14).

[0060] The same end wall (15 or 16) can use corrugated sheets of uniform specifications or can be spliced ​​together using corrugated sheets of different specifications. Therefore, the corrugated sheets 80 used in the same end wall (15 or 16) can have the same or different wave depths DD and the same or different sheet thicknesses DT.

[0061] Similarly, the same side wall (13 or 14) can use corrugated sheets of uniform specifications or can be spliced ​​with corrugated sheets of different specifications. Therefore, the corrugated sheets 80 used in the same side wall (13 or 14) can have the same or different wave depths DD and the same or different sheet thicknesses DT.

[0062] To further enhance the strength of the corrugated plate 80, reinforcing ribs may be provided on the inner surface of the corrugated plate 80. For example, the reinforcing ribs may be provided at locations where the corrugated depth DD of the corrugated plate 80 is relatively small. Alternatively, the reinforcing ribs may be provided at predetermined intervals.

[0063] In the cross-section of the corrugated plate 80, the planar dimensions of the convex waves 81 and the concave waves 82 of the corrugated plate 80 can be the same or different. In other words, the cross-section of the convex wave 81 and the cross-section of the concave wave 82 can be congruent or non-congruent. For example, the convex waves 81 and the concave waves 82 can have different shapes. For example, one of the crests 83 and troughs 84 can be configured as an arc, while the other can be configured as a straight line. Alternatively, the convex waves 81 and the concave waves 82 can have different widths. As shown in Figure 5, the width of the convex waves 81 is smaller than the width of the concave waves 82. Those skilled in the art can also use other methods to configure the convex waves 81 and the concave waves 82 to have different planar dimensions.

[0064] The corrugated plate 80 can have different wave shapes. For example, the cross-section of the wave can be a serpentine curve or a broken line. In the broken line scheme shown in Figure 5, the crest portion 83, the trough portion 84 and the connecting portion 85 are all substantially flat plates. The convex wave 81 and the concave wave 82 are both C-shaped broken lines. Optionally, the crest portion 83 and the trough portion 84 are parallel to each other. The connecting portion 85 can intersect the crest portion 83 perpendicularly or not perpendicularly. The connecting portion 85 can intersect the trough portion 84 perpendicularly or not perpendicularly. When they do not intersect perpendicularly, the intersection angle α between the connecting portion 85 and the crest portion 83 (or the trough portion 84) is an acute angle or an obtuse angle within the convex wave 81 (or the concave wave 82). Optionally, the convex wave 81 has an axially symmetrical structure that is symmetrical about a first symmetry axis A1, and the first symmetry axis A1 extends along the corrugation depth direction DCD. Optionally, the concave wave 82 has an axisymmetric structure that is symmetrical about a second symmetry axis A2, and the second symmetry axis A2 extends along the corrugation depth direction DCD.

[0065] The present disclosure provides a wall panel corrugated design that meets strength requirements. By matching the wave depth of the corrugated plate with the plate thickness, the strength of the corrugated plate can meet the liquid transportation requirements, thereby breaking through the traditional method of using tank containers to transport liquids, allowing square containers to also transport liquids, giving full play to the advantages of large volume, and being able to transport more liquids at a time, reducing logistics costs, saving transportation resources, and reducing carbon emissions.

[0066] The processes and steps described in all the preferred embodiments described above are merely examples. Unless adverse effects occur, various processing operations may be performed in a different order from the above process. The order of the steps in the above process may also be increased, combined, or deleted according to actual needs.

[0067] In understanding the scope of the present disclosure, the term "comprise" and its derivatives as used herein are intended to be open terms that specify the presence of recited features, elements, components, groups, integers, and / or steps, but do not exclude the presence of other unrecorded features, elements, components, groups, integers, and / or steps. This concept also applies to words with similar meanings, such as the terms "include," "have," and their derivatives.

[0068] As used herein, the terms "attached" or "attached" include: configurations where an element is directly secured to another element by securing it directly to the other element; configurations where an element is indirectly secured to the other element by securing it to an intermediate member that is in turn secured to the other element; and configurations where one element is integral with the other, i.e., one element is substantially a part of the other. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "secure," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent an amount of deviation that would modify the term such that the end result would not be significantly changed.

[0069] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present disclosure. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise indicated.

[0070] The present disclosure has been described through the above-described embodiments, but it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present disclosure to the described embodiments. In addition, it will be understood by those skilled in the art that the present disclosure is not limited to the above-described embodiments, and that various variations and modifications may be made based on the teachings of the present disclosure, all of which fall within the scope of protection claimed by the present disclosure.

Claims

1. A container (100) for storing and transporting liquid materials, characterized in that: The invention comprises two front and rear end walls (15, 16) and two left and right side walls (13, 14), at least one of the two end walls (15, 16) and the two side walls (13, 14) comprises a corrugated plate (80), and the corrugated plate (80) extends in a vertical direction, wherein the wave depth of at least one wave of the corrugated plate (80) ranges from [50, 100] mm, and the plate thickness of the corrugated plate (80) at the at least one wave is greater than or equal to 2.6 mm.

2. The container (100) according to claim 1, characterized in that The wave depth of the at least one wave is in the range of [50, 80] mm; and / or The plate thickness at the at least one wave has a value range of [2.6, 4] mm.

3. The container (100) according to claim 1 or 2, characterized in that: The wave depth of all waves of the corrugated plate (80) has a value range of [50, 100] mm.

4. The container (100) according to any one of claims 1 to 3, characterized in that: The two end walls (15, 16) and the two side walls (13, 14) are both constructed of the corrugated plate; and / or In a cross section of the corrugated plate (80), the planar dimensions of the convex waves (81) and the concave waves (82) of the corrugated plate (80) are the same or different.

5. The container (100) according to any one of claims 1 to 4, characterized in that: The corrugated plate (80) includes a crest portion (83), a trough portion (84) and a connecting portion (85), wherein the crest portion (83) and the trough portion (84) are alternately arranged, and the connecting portion (85) connects the crest portion (83) and the trough portion (84). In the cross section of the corrugated plate (80), the intersection angle between the connecting portion (85) and the crest portion (83) is non-right angle or right angle, and the intersection angle between the connecting portion (85) and the trough portion (84) is non-right angle or right angle.

6. The container (100) according to any one of claims 1 to 5, characterized in that: The wave depth of the corrugated plate (80) used for the end walls (15, 16) is consistent with or inconsistent with the wave depth of the corrugated plate (80) used for the side walls (13, 14).

7. The container (100) according to any one of claims 1 to 6, characterized in that: The plate thickness of the corrugated plate (80) used for the end walls (15, 16) is consistent with or inconsistent with the plate thickness of the corrugated plate (80) used for the side walls (13, 14).

8. The container (100) according to any one of claims 1 to 7, characterized in that: The corrugated plates (80) used for the same end wall (15, 16) or the same side wall (13, 14) may have the same or different wave depths.

9. The container (100) according to any one of claims 1 to 8, characterized in that: The corrugated plates (80) used for the same end wall (15, 16) or the side wall (13, 14) may have uniform or non-uniform plate thicknesses.

10. The container (100) according to any one of claims 1 to 9, characterized in that: The container (100) further comprises: at least one wave-breaking plate (20), the wave-breaking plate (20) being arranged in the interior space (19) of the container (100) and extending perpendicularly to the length direction (D1) of the container (100); and / or Reinforcing ribs are provided on the inner surfaces of the end walls (15, 16) and / or the side walls (13, 14).

11. The container (100) according to any one of claims 1 to 10, characterized in that: The container (100) further comprises: a thermometer (52) for detecting the temperature of the liquid inside the container (100), wherein the thermometer (52) is installed on the outer wall of the container (100); and A heating pipe (40) is used to contain a heating liquid. The heating pipe (40) is arranged in the inner space (19) of the container (100). The inlet (401) and the outlet of the heating pipe (40) are connected to the outer wall of the container (100).

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