Thermal insulation tank truck manhole box

Abstract

The utility model discloses a manhole box of a thermal insulation tank truck, which belongs to the technical field of tank truck parts and comprises a lower box body with an annular structure, and the bottom of the lower box body is mounted above a tank body; the partition plate is arranged in the lower box body and arranged outside the manhole assembly in a sleeving mode so as to form a closed cavity used for being filled with heat preservation materials. The upper box body is mounted right above the lower box body, and the shape and the size of the upper box body are matched with those of the lower box body; the heat insulation pad is arranged between the lower box body and the upper box body; the manhole box is divided into the lower box body, the heat insulation pad and the upper box body, so that heat bridge transfer is cut off, the tank body cannot exchange heat with the external environment through the manhole box to generate heat loss, the heat insulation effect is achieved, and the situation that media transported by the tank truck are thickened and difficult to unload is avoided; and the partition plate is arranged to form the closed cavity used for being filled with the heat preservation material, so that heat loss caused by exposure of the tank body in the lower box body is avoided, and the heat preservation and insulation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tank truck parts, in particular to a manhole box for a thermal insulation liquid tank truck. Background Art

[0002] The manhole box is a device installed on the top of the tank truck to protect the top manhole assembly. It recovers the overflowing materials during top loading to prevent the materials from polluting the surrounding environment.

[0003] However, when current tank vehicles are transporting high-temperature media, the manhole box on the top is directly connected to the tank body, making it difficult to keep warm due to the heat conduction of the metal, resulting in heat loss due to heat exchange with the external environment, which in turn will cause the transported medium to thicken and become difficult to unload. Utility Model Content

[0004] The utility model aims to provide a manhole box for a heat-insulating liquid tank truck, which solves the technical problem of poor heat-insulating effect of the manhole box in the prior art.

[0005] The utility model discloses a manhole box of a thermal insulation liquid tank truck, comprising:

[0006] The lower box body is a ring-shaped structure, and the bottom is installed above the tank body;

[0007] A partition plate is arranged in the lower box body and sleeved outside the manhole assembly to form a closed chamber for filling with thermal insulation material;

[0008] The upper box body is installed directly above the lower box body, and its shape and size are adapted to the lower box body;

[0009] A heat insulating pad is arranged between the lower box body and the upper box body.

[0010] The present application divides the manhole box into a lower box body, an insulating pad and an upper box body, thereby isolating the heat bridge transfer, making it impossible for the tank body to exchange heat with the external environment through the manhole box and generate heat loss, thereby playing a role in thermal insulation and preventing the medium transported by the tank truck from becoming thickened and difficult to unload; and also forms a closed chamber for filling with insulating materials by arranging partitions, thereby avoiding heat loss caused by the exposure of the tank body in the lower box, thereby improving the thermal insulation effect.

[0011] On the basis of the above technical solution, the solution of this application can also be improved as follows:

[0012] Preferably, the lower box includes

[0013] Two first lower side panels are arranged opposite to each other on the left and right sides.

[0014] The two second lower side panels are arranged opposite to each other front and back, and have an arc-shaped concave surface at the bottom.

[0015] Wherein, two of the first lower side plates and two of the second lower side plates are alternately connected to form a circular structure;

[0016] The upper box body comprises

[0017] Two first upper side panels are arranged opposite to each other on the left and right sides.

[0018] Two second upper side panels are arranged opposite to each other front and back.

[0019] Among them, the two first upper side plates and the two second upper side plates are alternately connected to form a circular structure; the adoption of this scheme is convenient for installation and arrangement above the tank body, thereby improving the production and assembly efficiency, and an arc-shaped concave surface is also provided so that the second lower side plate is fully engaged with the outer periphery of the tank body, thereby improving the welding stability, and its regularity is strong, which is convenient for the arrangement of other matching components, and the actual application effect is good.

[0020] Preferably, the lower box includes

[0021] The lower frame is a circular structure, including

[0022] A first lower folding edge is provided on the inner side of the top of the first lower side plate,

[0023] A second lower folded edge, arranged on the inner side of the top of the second lower side plate;

[0024] The upper box body comprises

[0025] The middle frame has a circular structure, including

[0026] The first middle folded edge is arranged on the inner side of the bottom of the first upper side plate,

[0027] A second middle folded edge, provided on the inner side of the bottom of the second upper side plate;

[0028] The thermal insulation pad is arranged between the lower support frame and the middle support frame; by adopting this solution, the thermal insulation pad can be supported by clamping up and down, ensuring the tightness of the fit and improving the barrier effect, and through the structural design of the two, the structural stability is improved and the structural strength is enhanced.

[0029] Preferably, the lower support frame is provided with a plurality of first mounting holes, the middle support frame is provided with a plurality of second mounting holes, and the thermal insulation pad is provided with a plurality of third mounting holes;

[0030] The first mounting hole, the second mounting hole and the third mounting hole correspond to each other one by one and are used to realize the bolt connection between the lower support frame and the middle support frame. By adopting this solution, the bolt and nut connection can be realized, and the disassembly and assembly are convenient and quick, the connection is stable, the assembly efficiency is improved, and it is convenient for practical application.

[0031] Preferably, the upper box includes

[0032] The upper support frame is a circular structure, including

[0033] A first upper folding edge is provided on the inner side of the top of the first upper side plate,

[0034] The second upper folding edge is arranged on the inner side of the top of the second upper side plate; by adopting this solution, the inner side of the top of the upper box body can be structurally supported, thereby reducing the stress concentration at the connection between adjacent first upper side plates, thereby improving the impact resistance.

[0035] Preferably, it includes:

[0036] Four lower brackets are divided into two groups, and the two lower brackets in each group are relatively parallel and arranged on both sides of the first lower side plate, and the lower brackets include

[0037] The inclined horizontal plate has a height at one end away from the first upper side plate lower than that at the other end,

[0038] A vertical plate, arranged on the outer side of the bottom of the inclined horizontal plate, and one end of which is connected to the first upper side plate;

[0039] Two upper support plates are arranged one by one at the lower part of the first upper side plate or the upper part of the first lower side plate, and the two ends of the upper support plates are respectively overlapped on one of the vertical plates, and are on the same inclined plane as the two inclined transverse plates located on the same side; adopting this scheme, it plays a supporting role for the lower box body, thereby reducing stress concentration at the connection and improving the stability of the connection. By arranging the inclined transverse plates and the upper support plates, the firmness of the protective plate after installation can be improved, and the probability of accidental falling off and damage during actual use is reduced.

[0040] Preferably, the bottom of the vertical plate is in an arc-shaped structure, which is used to fully fit and fix with the tank body; adopting this solution, the connection firmness is improved and the structural strength is enhanced.

[0041] Preferably, it includes:

[0042] Two support plates are vertically arranged one by one in the middle of the bottom surface of the upper support plate, and the bottom is fixed on the tank body; adopting this solution, the bearing capacity is improved, and the stress in the middle position is avoided to be too concentrated, resulting in deformation, bending, etc., thereby ensuring the use effect.

[0043] Through the above technical solution, the utility model achieves the following beneficial effects:

[0044] 1. The present application divides the manhole box into a lower box body, an insulation pad and an upper box body, thereby isolating the heat bridge transmission, so that the tank body cannot exchange heat with the external environment through the manhole box and generate heat loss, thereby playing a role in heat preservation and heat insulation, and preventing the medium transported by the tank truck from being thickened and difficult to unload; and also forms a closed chamber for filling insulation materials by setting a partition, thereby preventing the heat loss caused by the exposure of the tank body in the lower box body, and improving the heat preservation and heat insulation effect;

[0045] 2. The present application can provide upper and lower clamping support for the thermal insulation pad by setting the lower support frame and the middle support frame, thereby ensuring the tightness of the fit and improving the barrier effect. In addition, the structural stability and strength of the structure are improved by the structural design of the two.

[0046] 3. The present application provides support for the lower box body by setting a vertical plate, thereby reducing stress concentration at the connection and improving the stability of the connection. By setting an inclined horizontal plate and an upper support plate, the firmness of the protective plate after installation can be improved, reducing the probability of accidental falling off and damage during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 This is a structural schematic diagram of a manhole box for a thermal insulation liquid tank truck according to a specific embodiment of the utility model;

[0049] Figure 2 for Figure 1 The schematic diagram of the installation of the heat insulation pad in the manhole box of the thermal insulation tank truck is shown;

[0050] Figure 3 for Figure 1 The structural schematic diagram of the lower box body in the manhole box of the thermal insulation liquid tank truck shown;

[0051] Figure 4 for Figure 1 The structural schematic diagram of the upper box body in the manhole box of the thermal insulation liquid tank truck shown;

[0052] Figure 5 for Figure 1 The installation diagram of the manhole box of the thermal insulation tank truck is shown;

[0053] Figure 6 for Figure 1 The schematic cross-sectional view of the manhole box of the insulated liquid tank truck when in use;

[0054] Figure 7 for Figure 6 The enlarged schematic diagram of point A in the middle;

[0055] Description of reference numerals:

[0056] 1. Lower box; 2. Partition; 3. Upper box; 4. Insulation pad; 5. Lower bracket; 6. Upper support plate; 7. Support plate; 8. Manhole assembly;

[0057] 11. first lower side plate; 12. second lower side plate; 13. lower support frame; 31. first upper side plate; 32. second upper side plate; 33. middle support frame; 34. upper support frame; 41. third mounting hole; 51. inclined horizontal plate; 52. vertical plate;

[0058] 121, arc-shaped concave surface; 131, first lower folding edge; 132, second lower folding edge; 133, first mounting hole; 331, first middle folding edge; 332, second middle folding edge; 333, second mounting hole; 341, first upper folding edge; 342, second upper folding edge. DETAILED DESCRIPTION

[0059] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0060] First of all, it should be noted that in the following description, some directional words, such as "external" and "internal", etc., which are used to clearly explain the technical solution of the utility model, are analogous to the normal directions of the components in the air-cooled circulating drinking liquid semiconductor refrigeration system. For example, the part where the liquid passes is the internal part, and the part opposite to it is the external part. (Term explanation part) is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0063] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0064] Example:

[0065] like Figures 1 to 5 As shown, an embodiment of the present application discloses an insulated liquid tank truck manhole box, which is used to protect the manhole assembly 8 on the top of the liquid tank truck, and its specific structure includes: a lower box body 1, a partition 2, an upper box body 3 and an insulation pad 4.

[0066] The lower box body 1 is annular in structure, and the bottom is installed above the tank body; the lower box body 1 can be rectangular, circular or other shapes, as long as it can be mounted on the outside of the manhole assembly 8, and there is no specific limitation.

[0067] The partition plate 2 is arranged in the lower box body 1 and is sleeved outside the manhole assembly 8 to form a closed chamber for filling the insulation material; Figure 6 As shown, the closed chamber is composed of a partition plate 2, a manhole assembly 8, a lower box body 1 and a tank body, which cooperate with each other and surround the manhole assembly 8.

[0068] The upper box body 3 is installed directly above the lower box body 1 , and its shape and size are matched with those of the lower box body 1 .

[0069] The thermal insulation pad 4 is arranged between the lower box body 1 and the upper box body 3; the thermal insulation pad 4 is made of a material with a low thermal conductivity coefficient, such as aramid rubber, rock wool, ceramic fiber, etc., without specific limitation, and is used to block the thermal bridge between the lower box body 1 and the upper box body 3.

[0070] In the above technical solution, during installation, the lower box body 1 is welded on the top of the tank body and is sleeved on the outside of the manhole assembly 8, and then Figure 6 As shown, the insulation material is filled around the manhole assembly 8 in the lower box body 1, and then the partition 2 is welded in the lower box body 1 to form a closed chamber, so as to seal and protect the insulation material, and then the insulation pad 4 is arranged on the top of the lower box body 1, and then the upper box body 3 is installed and fixed on the insulation pad 4, thereby completing the installation of the manhole box.

[0071] The utility model divides the manhole box into a lower box body 1, a heat insulating pad 4 and an upper box body 3, thereby blocking the heat bridge transfer, making it impossible for the tank body to exchange heat with the external environment through the manhole box and generate heat loss, thereby playing a role in heat preservation and heat insulation, and preventing the medium transported by the tank truck from becoming thickened and difficult to unload; and also forms a closed chamber for filling with heat insulating materials by arranging a partition 2, thereby preventing heat loss caused by the tank body being exposed in the lower box body 1, and improving the heat preservation and heat insulation effect.

[0072] In some embodiments, in order to facilitate production and installation and improve structural regularity, the lower box body 1 and the partition 2 are further designed as shown below:

[0073] Specifically, the lower box 1 includes:

[0074] Two first lower side plates 11 are arranged opposite to each other on the left and right sides;

[0075] Two second lower side plates 12 are arranged opposite to each other in the front and rear directions, and have an arc-shaped concave surface 121 at the bottom. The arc-shaped concave surface 121 is used to fully engage with the outer surface of the tank body to improve the stability of welding;

[0076] The two first lower side plates 11 and the two second lower side plates 12 are alternately connected to form a circular structure.

[0077] Specifically, the upper box 3 includes:

[0078] Two first upper side plates 31 are arranged opposite to each other.

[0079] The two second upper side plates 32 are arranged opposite to each other in front and back.

[0080] The two first upper side plates 31 and the two second upper side plates 32 are alternately connected to form a circular structure.

[0081] Through the above design, the lower box body 1 and the upper box body 3 are in a U-shaped structure, which is convenient for installation and arrangement above the tank body, thereby improving the production and assembly efficiency. The arc-shaped concave surface 121 is also provided so that the second lower side plate 12 is fully engaged with the outer periphery of the tank body, thereby improving the welding stability. In addition, it has strong regularity, which is convenient for the arrangement of other matching components and has a good practical application effect.

[0082] In this embodiment, in order to facilitate the installation and fixation of the thermal insulation pad 4, the lower box body 1 and the partition 2 are further designed as shown below:

[0083] Specifically, Figure 3 As shown, the lower box 1 includes

[0084] The lower support frame 13 is a circular structure, including

[0085] The first lower folding edge 131 is provided on the inner side of the top of the first lower side plate 11.

[0086] The second lower folded edge 132 is disposed on the inner side of the top of the second lower side plate 12 .

[0087] Exemplarily, the first lower folded edge 131 and the second lower folded edge 132 are both L-shaped structures, and the two ends of the second lower folded edge 132 are respectively abutted against the two first lower folded edges 131, so that the two support each other, thereby improving the structural stability and enhancing the structural strength.

[0088] Preferably, the first lower folding edge 131 is integrally formed with the first lower side plate 11 and formed by bending; the second lower folding edge 132 is integrally formed with the second lower side plate 12 and formed by bending; it facilitates production and manufacturing and improves production efficiency.

[0089] Specifically, Figure 4 As shown, the upper box 3 includes

[0090] The middle support frame 33 is a circular structure, including

[0091] The first middle folded edge 331 is provided at the inner side of the bottom of the first upper side plate 31.

[0092] The second middle folded edge 332 is disposed on the inner side of the bottom of the second upper side plate 32 .

[0093] Exemplarily, the first middle folded edge 331 and the second middle folded edge 332 are both of the same type, and the two ends of the second middle folded edge 332 are respectively abutted against the two first middle folded edges 331, so that the two support each other, thereby improving the structural stability and enhancing the structural strength.

[0094] The heat insulation pad 4 is arranged between the lower support frame 13 and the middle support frame 33. The shape and size of the heat insulation pad 4 are the same as those of the lower support frame 13 and the middle support frame 33, and both are in a circular structure, so that the upper and lower surfaces can fully fit with the two, thereby improving the barrier effect and ensuring the structural regularity.

[0095] Preferably, the thermal insulation pad 4 is formed by assembling a plurality of thermal insulation strips together, and may be four, or other numbers without specific limitation, so as to facilitate installation, disassembly and production.

[0096] By providing the lower support frame 13 and the middle support frame 33, the thermal insulation pad 4 can be supported in an upper and lower clamping manner, thereby ensuring the tightness of the fit and improving the barrier effect. In addition, through the structural design of the two, the structural stability is improved and the structural strength is enhanced.

[0097] In this embodiment, if Figures 2-3 and Figure 7 As shown, in order to facilitate disassembly and assembly, a plurality of first mounting holes 133 are provided on the lower support frame 13, a plurality of second mounting holes 333 are provided on the middle support frame 33, and a plurality of third mounting holes 41 are provided on the thermal insulation pad 4;

[0098] The first mounting hole 133 , the second mounting hole 333 and the third mounting hole 41 correspond to each other and are used to realize the bolt connection between the lower support frame 13 and the middle support frame 33 .

[0099] By utilizing the relatively aligned first mounting hole 133 , second mounting hole 333 and third mounting hole 41 , bolt and nut connection can be achieved, which is convenient and quick to assemble and disassemble, has a strong connection stability, improves assembly efficiency, and is convenient for practical application.

[0100] In some embodiments, Figure 1 and Figure 4 As shown, in order to improve the structural stability of the upper box body 3, the upper box body 3 is further designed, and its structure includes

[0101] The upper support frame 34 is a circular structure, including

[0102] The first upper folding edge 341 is disposed on the inner side of the top of the first upper side plate 31.

[0103] The second upper folding edge 342 is disposed on the inner side of the top of the second upper side plate 32 .

[0104] Exemplarily, the first upper fold edge 341 and the second upper fold edge 342 are both L-shaped structures, and the two ends of the second upper fold edge 342 are respectively abutted against the two first upper fold edges 341, so that the two support each other, thereby improving the structural stability and enhancing the structural strength.

[0105] By providing the upper support frame 34 , the top inner side of the upper box body 3 can be structurally supported, thereby reducing stress concentration at the connection between adjacent first upper side plates 31 , thereby improving impact resistance.

[0106] In some embodiments, Figures 1 to 3 As shown, in order to improve the stability of the lower box body 1 after installation and facilitate the covering and installation of the outer insulation layer of the tank body, four lower brackets 5 and two upper support plates 6 are also provided.

[0107] like Figure 3 As shown, the four lower brackets 5 are divided into two groups, and the two lower brackets 5 in each group are relatively and parallelly arranged on both sides of a first lower side plate 11 .

[0108] Specifically, the lower bracket 5 includes:

[0109] The height of the inclined horizontal plate 51, which is away from the first upper side plate 31, is lower than the height of the other end;

[0110] The vertical plate 52 is arranged on the outer side of the bottom of the inclined horizontal plate 51, and one end is connected to the first upper side plate 31; the bottom of the vertical plate 52 is welded to the tank body, the top is connected to the inclined horizontal plate 51, and the side is welded to the first lower side plate 11, so as to support the lower box body 1, thereby reducing the stress concentration at the connection and improving the stability of the connection.

[0111] Exemplarily, the inclined transverse plate 51 and the vertical plate 52 are an integrally formed part and are formed by bending, which facilitates production and improves production efficiency.

[0112] Two upper supporting plates 6 are correspondingly arranged at the lower part of the first upper side plate 31 or the upper part of the first lower side plate 11. Both ends of the upper supporting plates 6 are respectively overlapped on a vertical plate 52 and are located on the same inclined plane as the two inclined horizontal plates 51 on the same side.

[0113] In practical application, the manhole box is Figure 5 Installed on the top of the tank as shown; then covered around the outer periphery of the tank with insulation material, and the insulation material is as shown in FIG. Figure 7 As shown, it will extend between the two vertical plates 52 to ensure the thermal insulation effect; then, a protective plate will be covered on the top of the thermal insulation material to extend the service life; wherein, to ensure a firm installation, the protective plate will be fitted and fixed on the inclined surface formed by the inclined horizontal plate 51 and the upper support plate 6, so as to fully protect the thermal insulation material between the vertical plates 52.

[0114] By providing the vertical plate 52, a supporting effect is played on the lower box body 1, thereby reducing stress concentration at the connection and improving the stability of the connection. By providing the inclined horizontal plate 51 and the upper support plate 6, the firmness of the protective plate after installation can be improved, reducing the probability of accidental falling off and damage during actual use.

[0115] In this embodiment, if Figure 3 and Figure 6 As shown, the bottom of the vertical plate 52 is an arc-shaped structure, which is used to fully fit and fix with the tank body, thereby improving the connection firmness and enhancing the structural strength.

[0116] Based on the above scheme, if Figure 1 As shown, it also includes:

[0117] Two support plates 7 are vertically arranged one by one at the middle of the bottom surface of the upper support plate 6, and the bottoms are fixed on the tank body.

[0118] The support plate 7 is used to support the middle part of the upper support plate 6, so as to improve the bearing capacity, avoid excessive stress concentration in the middle position, and avoid deformation, bending, etc., thereby ensuring the use effect.

[0119] Preferably, the top of the support plate 7 has an integrally formed bending piece, and the bending piece is welded to the bottom surface of the upper support plate 6. This improves the firmness of the connection between the support plate 7 and the upper support plate 6.

[0120] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A manhole box for a thermal insulation liquid tank truck, characterized in that: include: The lower box body (1) is an annular structure, and the bottom is installed above the tank body; A partition plate (2) is arranged in the lower box body (1) and sleeved outside the manhole assembly (8) to form a closed chamber for filling with thermal insulation material; An upper box body (3) is installed directly above the lower box body (1) and has a shape and size that matches the lower box body (1); A heat insulation pad (4) is arranged between the lower box body (1) and the upper box body (3).

2. The manhole box of the thermal insulation liquid tank truck according to claim 1, characterized in that: The lower box (1) comprises Two first lower side plates (11) are arranged opposite to each other on the left and right sides. Two second lower side plates (12) are arranged opposite to each other in front and back, and have arc-shaped concave surfaces (121) at the bottom. Wherein, the two first lower side plates (11) and the two second lower side plates (12) are alternately connected to form a circular structure; The upper box (3) comprises Two first upper side plates (31) are arranged opposite to each other on the left and right sides. Two second upper side plates (32) are arranged opposite to each other in front and back. The two first upper side plates (31) and the two second upper side plates (32) are alternately connected to form a circular structure.

3. The manhole box of the thermal insulation liquid tank truck according to claim 2, characterized in that: The lower box (1) comprises The lower support frame (13) is a circular structure, comprising A first lower folding edge (131) is provided on the inner side of the top of the first lower side plate (11), A second lower folded edge (132) is provided on the inner side of the top of the second lower side plate (12); The upper box (3) comprises The middle support frame (33) is a circular structure, comprising A first middle folded edge (331) is provided on the inner side of the bottom of the first upper side plate (31). A second middle folded edge (332) is provided on the inner side of the bottom of the second upper side plate (32); The heat insulation pad (4) is arranged between the lower support frame (13) and the middle support frame (33).

4. The manhole box of the thermal insulation liquid tank truck according to claim 3, characterized in that: The lower support frame (13) is provided with a plurality of first mounting holes (133), the middle support frame (33) is provided with a plurality of second mounting holes (333), and the thermal insulation pad (4) is provided with a plurality of third mounting holes (41); The first mounting hole (133), the second mounting hole (333) and the third mounting hole (41) correspond to each other one by one and are used to realize the bolt connection between the lower support frame (13) and the middle support frame (33).

5. The manhole box of the thermal insulation liquid tank truck according to claim 3, characterized in that: The upper box (3) comprises The upper support frame (34) is a circular structure, comprising A first upper folding edge (341) is provided on the inner side of the top of the first upper side plate (31), The second upper folded edge (342) is arranged on the inner side of the top of the second upper side plate (32).

6. The manhole box of the thermal insulation liquid tank truck according to claim 2, characterized in that: include: The four lower brackets (5) are divided into two groups, and the two lower brackets (5) in each group are arranged relatively parallel to each other on both sides of the first lower side plate (11), and the lower brackets (5) include The height of the inclined horizontal plate (51) at one end away from the first upper side plate (31) is lower than that at the other end. A vertical plate (52) is arranged on the outside of the bottom of the inclined horizontal plate (51), and one end of the vertical plate is connected to the first upper side plate (31); Two upper supporting plates (6) are arranged one by one at the lower part of the first upper side plate (31) or the upper part of the first lower side plate (11), and the two ends of the upper supporting plates (6) are respectively overlapped on one of the vertical plates (52) and are located on the same inclined plane as the two inclined horizontal plates (51) located on the same side.

7. The manhole box of the thermal insulation liquid tank truck according to claim 6, characterized in that: The bottom of the vertical plate (52) is in an arc-shaped structure, and is used to fully fit and fix with the tank body.

8. The manhole box of the thermal insulation liquid tank truck according to claim 6, characterized in that: include: Two support plates (7) are vertically arranged one by one at the middle of the bottom surface of the upper support plate (6), and the bottoms are fixed on the tank body.

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