A tank container

Abstract

The application relates to the technical field of tank type carrying equipment, and discloses a tank container, which comprises a frame, a tank body installed in the frame, a manhole for maintenance arranged on the tank body, a top manhole for maintenance and an end manhole for maintenance, the top manhole for maintenance being arranged at the top end of the tank body, the end manhole for maintenance being arranged on the head of the tank body, the end manhole for maintenance being arranged below the center point of the head, the end manhole for maintenance extending outward to form a connecting ring, an end manhole cover being hingedly arranged on the connecting ring, and an end sealing ring being arranged at the position where the inner surface of the end manhole cover is in contact with the connecting ring; a catwalk is arranged at the top end of the frame and has a net structure, and the catwalk is composed of a fixed catwalk and a movable catwalk. The tank container provided by the application is convenient for workers to enter and exit the manhole for maintenance to operate, and can guarantee the safety and reliability of the tank body filled with medium for transportation.

Description

Technical Field

[0001] This application relates to the field of tank transport equipment technology, and in particular to a tank container. Background Technology

[0002] Containers, as reusable storage and transportation equipment suitable for one or more modes of transport, play a vital role in the transportation industry. With the development of industries such as food and chemicals, tank containers for transporting liquids have been widely used in international and domestic markets, especially for transporting environmentally hazardous substances such as sludge and oil. The safety and sealing properties of tank containers make the overall transportation process safer and more reliable. However, for some large tanks, which typically have large capacities and considerable heights, maintenance and other operations often present numerous inconveniences. For example, the utility model patent CN210286729U discloses a containerized oil storage tank with an inspection port assembly on the top cover. The manhole cover is installed on the inspection cover base of the assembly, requiring workers to climb to the top of the tank for maintenance. Furthermore, the single inspection port design cannot effectively address specific maintenance needs and problems. Summary of the Invention

[0003] To address the aforementioned problems in the prior art, this application provides a tank container that facilitates maintenance of the tank by staff and ensures the safety and stability of the tank container when loading media.

[0004] This application provides a tank container, comprising: a frame including columns and crossbeams, wherein at least four columns are provided, and the crossbeams include a top crossbeam and a bottom crossbeam; a tank body installed within the frame, the tank body including a cylindrical body and end caps located at both ends of the cylindrical body, a safety valve being provided at the upper end of the tank body, the safety valve being connected to the gas phase space inside the tank body; and a maintenance manhole provided on the tank body, including a top maintenance manhole and an end maintenance manhole, the top maintenance manhole being located at the top of the tank body, and the end maintenance manhole being located on the end caps of the tank body, below the center point of the end caps, the end maintenance manhole facing... The outer side of the end cap extends to form a connecting ring, and the connecting ring is provided with an end manhole cover that is hinged to it. An end sealing ring is provided at the position where the inner surface of the end manhole cover contacts the connecting ring. The upper width of the connecting ring is smaller than the lower width. The walkway is located at the top of the frame and has a mesh structure. The walkway consists of a fixed walkway and a movable walkway. The movable walkway is located above the safety valve and the top maintenance manhole, respectively. The movable walkway has a square frame structure with a mesh structure inside the frame. One end of the movable walkway is hinged to the top crossbeam, and the other end is opened and locked by a switch provided on the top crossbeam.

[0005] In some implementations of this application, the frame side is provided with a crash plate, which is a cross-shaped structure.

[0006] In some implementations of this application, the upper end of the column is provided with a lifting lug, which is fixedly connected to the column.

[0007] In some implementations of this application, the top maintenance manhole includes at least one, the top maintenance manhole is provided with a top manhole cover at its upper end, one end of the top manhole cover is hinged to the tank body, the center of the top manhole cover is provided with an opening, and the top manhole cover is provided with a top manhole inner cover hinged to the opening.

[0008] In some implementations of this application, a liquid collection tray is provided directly below the end inspection manhole, and the liquid collection tray is fixed to the bottom crossbeam.

[0009] In some implementations of this application, the upper end of the tank is further provided with a gas phase ball valve, the upper end of the gas phase ball valve is provided with an air inlet cover, and the movable walkway is provided above the gas phase ball valve. One end of the movable walkway is hinged to the top crossbeam, and the other end is opened and closed by a switch provided on the top crossbeam.

[0010] In some implementations of this application, a ladder is also included, which is located on the side of the frame.

[0011] In some implementations of this application, the angle between the line connecting the uppermost and lowermost connection points of the connecting ring and the end cap and the horizontal plane is 55-75 degrees.

[0012] In some implementations of this application, the switch includes an L-shaped locking shaft, a front fixing plate and a rear fixing plate fixed to the top crossbeam. Both the front and rear fixing plates have circular holes through which the L-shaped locking shaft passes. An upper limit post and a lower limit post are provided between the front and rear fixing plates, and the upper and lower limit posts are fixed to the top crossbeam. The distance between the upper and lower limit posts is greater than the diameter of the L-shaped locking shaft. Two symmetrical protrusions are provided near the front end of the L-shaped locking shaft. A spring is provided on the L-shaped locking shaft between the protrusions and the rear fixing plate. The diameter of the circular hole is greater than that of the L-shaped locking shaft and smaller than that of the spring. The height of the protrusions is less than the distance between the L-shaped locking shaft and the top crossbeam. An L-shaped baffle is provided on the movable walkway. The L-shaped baffle includes a vertical plate and a horizontal plate. The vertical plate is fixed to the movable walkway, and the upper surface of the horizontal plate is lower than the L-shaped locking shaft.

[0013] In some implementations of this application, the bottom crossbeam is provided with slots, the slots include heavy-duty slots and light-duty slots, the heavy-duty slots are located on both sides of the light-duty slots, and the heavy-duty slots are provided with reinforcing ribs above the heavy-duty slots. One end of the reinforcing ribs is fixedly connected to the tank body, and the other end is fixedly connected to the bottom crossbeam.

[0014] Compared with the prior art, this application achieves the following beneficial technical effects:

[0015] 1. This application provides a convenient way for workers to select the appropriate manhole for maintenance based on different situations by placing the manholes on the top and end caps of the tank. This eliminates the need to climb to the top of the tank every time, thus reducing safety risks.

[0016] 2. By placing the end inspection manhole below the center of the end cap, this application not only facilitates the entry and exit of personnel for operation, but also ensures the safety and reliability of transporting the tank when it is full of medium.

[0017] 3. This application provides movable walkways above the top maintenance manhole and safety valve, which facilitates the movement of personnel on the top of the tank and allows for timely opening or fixing of the movable walkways when the top maintenance manhole needs to be operated, thereby increasing the convenience and safety of the maintenance process. Attached Figure Description

[0018] Figure 1 A front view of a tank container is shown;

[0019] Figure 2 A left view of a tank container is shown;

[0020] Figure 3 A top view of a tank container is shown;

[0021] Figure 4 A right view of a tank container is shown;

[0022] Figure 5 A top view of the top access manhole of this application is shown;

[0023] Figure 6 It shows Figure 5 Cross-sectional view at point AA;

[0024] Figure 7 A schematic diagram of the activity walkway of this application in the closed state is shown;

[0025] Figure 8 A schematic diagram of the activity walkway of this application in the open state is shown.

[0026] Figure label:

[0027] 1. Frame; 11. Column; 12. Horizontal beam; 121. Top horizontal beam; 122. Bottom horizontal beam; 123. Heavy-duty slot; 124. Light-duty slot; 125. Reinforcing rib; 2. Tank body; 21. Shell; 22. End cap; 23. Support rod; 3. Safety valve; 41. Top maintenance manhole; 411. Top manhole outer cover; 412. Opening; 413. Top manhole inner cover; 414. Hinge pin; 415. Hinge component; 416. Top connecting ring; 417. Support ear; 418. Support inner ear; 419. Inner cover hinge pin; 420. Inner cover hinge Components; 42. End inspection manhole; 421. Connecting ring; 422. End manhole cover; 423. Pin; 424. End sprue bolt; 5. Walkway; 51. Fixed walkway; 52. Movable walkway; 521. L-shaped locking shaft; 522. Front fixing plate; 523. Rear fixing plate; 524. Upper limit post; 525. Lower limit post; 526. Protrusion; 527. Spring; 528. Round hole; 529. L-shaped baffle; 530. Vertical plate; 531. Horizontal plate; 6. Anti-collision plate; 7. Lifting lug; 8. Liquid collection tray; 9. Gas phase ball valve; 10. Ladder. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0029] This application provides a tank container that can be used in the food and chemical industries, and can also be used to carry environmentally harmful substances such as sludge and oil. Figure 1 A structural schematic diagram of a tank container is shown for reference. Figure 1 The tank container includes a frame 1, comprising columns 11 and crossbeams 12, with at least four columns 11 and crossbeams 12 including a top crossbeam 121 and a bottom crossbeam 122. A tank body 2 is installed within the frame 1 and is fixed to the frame 1 by support rods 23. The tank body 2 includes a cylindrical body 21 and end caps 22 at both ends of the cylindrical body 21. A safety valve 3 is provided at the upper end of the tank body 2, and the safety valve 3 is connected to the gas phase space inside the tank body 2. The safety valve 3 is a built-in full-opening spring safety valve device to prevent safety accidents caused by overpressure. A gas phase ball valve 9 is also provided at the upper end of the tank body 2, and an air inlet cover is provided at the upper end of the gas phase ball valve 9.

[0030] like Figure 2 and Figure 3As shown, the tank body 2 is provided with a maintenance manhole, including a top maintenance manhole 41 and an end maintenance manhole 42. The top maintenance manhole 41 is located at the top of the tank body 2, and the end maintenance manhole 42 is located on the end cap 22 of the tank body 2, below the center point of the end cap 22. The end maintenance manhole 42 extends outward from the end cap 22 to form a connecting ring 421. The connecting ring 421 is provided with an end manhole cover 422 hinged to it. The connecting ring 421 is provided with a hinge fixing member. The end manhole cover 422 is connected to a hinge movable member. Both the hinge fixing member and the hinge movable member are provided with pin holes for a pin shaft 423 to pass through. The pin shaft 423 passes through the hinge fixing member and the hinge movable member to form a hinge structure. The inner surface of the end manhole cover 422 is flush with the end cap 22. An end sealing ring is provided at the contact position of the connecting ring 421. Specifically, the end sealing ring is made of PTFE gasket, which has good compatibility with the medium. By providing a top maintenance manhole 41 and an end maintenance manhole 42, maintenance operations can be carried out according to different conditions of the tank 2. Maintenance operations can be carried out from the top through the top maintenance manhole 41, or the tank 2 can be entered through the end maintenance manhole 42 without having to climb to the top of the tank 2, reducing safety risks. The end manhole cover 422 is also fastened to the connecting ring 421 by end bolts. To enhance the fastening effect, multiple end sprue bolts 424 are used for fastening. Together with the end sealing ring, it allows personnel to enter the end maintenance manhole 42 without climbing, ensuring the safety and reliability of the tank 2 when transporting the medium and preventing leakage. The end maintenance manhole 42 is located slightly below the center of the end cap 22, allowing workers to enter the end maintenance manhole 42 without climbing. Specifically, the end maintenance manhole 42 extends horizontally outward from the end cap to form a thin connecting ring 421, and the upper width W1 of the connecting ring 421 is smaller than the lower width W2. In addition, the line connecting the uppermost and lowermost ends of the end manhole cover 422 is vertical, which facilitates the opening and closing of the end manhole cover 422 and the entry and exit of workers through the end maintenance manhole 42. This avoids the safety risks that workers may face when entering and exiting the tank 2 due to the inclined structure of the end manhole cover 422, and improves the convenience and safety of workers entering and exiting the tank 2.

[0031] The angle A between the line connecting the uppermost and lowermost connection points of the connecting ring 421 and the end cap 22 and the horizontal plane is 55-75 degrees. This technical solution facilitates personnel access to the end manhole 42 for operation and ensures that when the tank 2 is full of medium and the end manhole cover 422 is closed, the load pressure on the end manhole cover 422 is relatively small, thus guaranteeing the safety and reliability of the tank 2.

[0032] The walkway 5 is located at the top of the frame 1 and has a mesh structure. Specifically, the walkway 5 is a diamond-shaped wire mesh, which facilitates the movement of workers on the top of the tank 2. The walkway 5 consists of a fixed walkway 51 and a movable walkway 52. ​​The movable walkway 52 is located above the safety valve 3, the top inspection manhole 41, and the gas phase ball valve 9. The movable walkway 52 includes a square frame with a diamond-shaped wire mesh inside. One end of the movable walkway 52 is hinged to the top crossbeam 121, and the other end is opened and locked by a switch set on the top crossbeam 121. The movable walkway 52 is designed to facilitate the operation of the safety valve 3, the top maintenance manhole 41, or the gas phase ball valve 9 at any time. When the safety valve 3, the top maintenance manhole 41, or the gas phase ball valve 9 do not need to be operated, the movable walkway 52 can be locked by the switch set on the top crossbeam 121, thereby facilitating the movement of staff on the movable walkway 52 and the fixed walkway 51.

[0033] like Figure 7 and Figure 8 As shown, Figure 7 This is the closed state of the switch that locks the movable walkway 52. ​​At this time, the movable walkway 52 is locked to the top crossbeam 121, and workers can walk on the movable walkway 52. Figure 8 With the switch in the open position, the movable walkway 52 can be lifted upwards for easy operation of the safety valve 3, the top inspection manhole 41, or the gas phase ball valve 9. The switch includes an L-shaped locking shaft 521, a front fixing plate 522 and a rear fixing plate 523 fixed to the top crossbeam 121. Both the front fixing plate 522 and the rear fixing plate 523 have circular holes 528 through which the L-shaped locking shaft 521 can pass. An upper limit post 524 and a lower limit post 525 are provided between the front fixing plate 522 and the rear fixing plate 523. The upper limit post 524 and the lower limit post 525 are fixed to the top crossbeam 121. The distance between the upper limit post 524 and the lower limit post 525 is greater than the diameter of the L-shaped locking shaft 521. The L-shaped locking shaft 521 is located near the front end. Two symmetrical protrusions 526 are provided. A spring 527 is provided on the L-shaped locking shaft 521 between the protrusions 526 and the rear fixing piece 523. The diameter of the circular hole 528 is larger than that of the L-shaped locking shaft 521 and smaller than that of the spring 527. The height of the protrusions 526 is smaller than the distance between the L-shaped locking shaft 521 and the top crossbeam 121. An L-shaped baffle 529 is provided on the movable walkway 52. ​​The L-shaped baffle 529 includes a vertical plate 530 and a horizontal plate 531. The vertical plate 530 is fixed on the movable walkway 52, and the upper surface of the horizontal plate 531 is lower than that of the L-shaped locking shaft 521. When the switch is turned on... Figure 7 The closed state becomes Figure 8 When the switch is in the open state, rotating the L-shaped locking shaft 521 causes the protrusion 526 to move horizontally to the left, passing through the gap between the upper limit post 524 and the lower limit post 525, and moving to the left side of the upper limit post 524 and the lower limit post 525. Then, rotating the L-shaped locking shaft 521 causes the protrusion 526 to become vertical and be locked by the upper limit post 524 and the lower limit post 525. The spring 527 is compressed, and at this time, the L-shaped baffle 529 can be lifted upward, causing the movable walkway 52 to open upward. When the switch needs to be closed, the movable walkway 52 is lowered, and the L-shaped baffle 529 is in the open position. Figure 8 Position, at this time, rotate the L-shaped locking shaft 521 so that the protrusion 526 is in the horizontal direction. At this time, the tension of the spring 527 can push the protrusion 526 on the L-shaped locking shaft 521 to pop out to the right, so that the front end of the L-shaped locking shaft 521 is above the horizontal plate 531 of the L-shaped baffle 529, which can prevent the L-shaped baffle 529 from opening upward. At this time, the movable walkway 52 is in the locked state.

[0034] The frame 1 is provided with anti-collision plates 6 on its sides. The anti-collision plates 6 are located on the two sides of the frame 1 corresponding to the cylinder 21, and the anti-collision plates 6 have a cross-shaped structure. By setting the anti-collision plates 6, the tank 2 can be prevented from being damaged by impact, thus protecting the tank 2.

[0035] The upper end of the column 11 is provided with lifting lugs 7, which are fixedly connected to the column 11. In this embodiment, there are 4 lifting lugs 7. When lifting operations are required, the lifting tool is connected to the 4 lifting lugs 7 of the tank 2 in sequence. After the connection is completed, the lifting equipment is operated to lift the tank smoothly.

[0036] The top inspection manhole 41 includes at least one, the specific number depending on the size of the tank 2 and its usage, as shown in the attached diagram. Figure 1 As shown, there can be two top inspection manholes 41. (Reference) Figure 5 and Figure 6The top maintenance manhole 41 is provided with a top manhole cover 411 at its upper end. One end of the top manhole cover 411 is hinged to the tank body 2. Specifically, the top maintenance manhole 41 extends upward to form a top connecting ring 416. The top manhole cover 411 is installed on the top connecting ring 416. A support ear 417 is fixed on the top connecting ring 416. The support ear 417 is provided with a hole for the hinge pin 414 to pass through. The top manhole cover 411 is connected to a hinge member 415. The hinge pin 414 passes through the support ear 417 and the hinge member 415 to form a hinge structure. The top manhole cover 411 is also fastened to the top connecting ring 416 by cover bolts. Multiple cover bolts can be set according to the actual situation. In this embodiment, six cover bolts are set. Specifically, the cover bolts can be tumbler bolts, which are easy to install and have a good fastening effect. An outer cover sealing ring is provided on the inner surface of the top manhole outer cover 411 at the position where it contacts the top connecting ring 416; an opening 412 is provided at the center of the top manhole outer cover 411, and a top manhole inner cover 413 is provided on the top manhole outer cover 411 corresponding to the opening 412 and hinged thereto. Specifically, a supporting inner ear 418 is fixed on the top manhole outer cover 411, and the supporting inner ear 418 is provided with a hole for the inner cover hinge pin 419 to pass through. The top manhole inner cover 413 is connected to... The inner cover hinge 420 is connected to the inner cover hinge pin 419, which passes through the inner support ear 418 and the inner cover hinge 420 to form a hinge structure. The top manhole inner cover 413 is also fastened to the top manhole outer cover 411 by inner cover bolts. The inner cover bolts can be tumblers and multiple bolts can be set according to actual conditions. In this embodiment, three inner cover bolts are provided. An inner cover sealing ring is provided at the position where the inner surface of the top manhole inner cover 413 contacts the edge of the opening 412. Since the top manhole outer cover 411 and the top manhole inner cover 413 are different in size, different covers can be opened when loading and unloading liquid or performing maintenance operations according to actual working conditions. Generally, when loading and unloading liquid is required, the top manhole inner cover 413 is opened and the feed hose or suction hose is inserted for loading or unloading liquid. When maintenance is required, the top manhole outer cover 411 is opened to facilitate personnel to enter and exit the tank 2 for maintenance operations. Meanwhile, the inner surfaces of the top manhole outer cover 411 and the top manhole inner cover 413 are respectively provided with an outer cover sealing ring and an inner cover sealing ring. The outer cover sealing ring and the inner cover sealing ring are made of PTFE gaskets, which have good sealing performance and good compatibility with the medium, ensuring that the tank 2 is safe and reliable when transporting the medium and that there will be no medium leakage problem.

[0037] When it is necessary to transport volatile media, toxic media, or media that cannot be in contact with air, nitrogen needs to be injected into the tank 2. At this time, the end manhole cover 422, the top manhole outer cover 411, and the top manhole inner cover 413 on the tank 2 are all closed. Then, the air inlet cover of the gas phase ball valve 9 is opened, and the nitrogen external connector is connected to the gas phase ball valve 9 to inject nitrogen into the tank 2.

[0038] like Figure 2 As shown, a liquid collection tray 8 is provided directly below the end inspection manhole 42. The liquid collection tray 8 is fixed on the bottom crossbeam 122. The liquid collection tray 8 is inclined and is used to receive the medium flowing out of the end inspection manhole 42, and can also play a guiding role.

[0039] like Figure 4 As shown, the ladder 10 is located on the side of the frame 1. When it is necessary to climb to the top of the tank 2 for maintenance or other operations, the ladder 10 can be used to climb with less effort and takes up less space.

[0040] The bottom crossbeam 122 is provided with slots, including heavy-duty slots 123 and light-duty slots 124. The heavy-duty slots 123 are located on both sides of the light-duty slots 124. A reinforcing rib 125 is provided above the heavy-duty slots 123. One end of the reinforcing rib 125 is fixedly connected to the tank body 2, and the other end is fixedly connected to the bottom crossbeam 122. Specifically, there are two light-duty slots 124 and two heavy-duty slots 123. The light-duty slots 124 are located inside the heavy-duty slots 123. When lifting an empty tank, the light-duty slots 124 can be used. When the tank body 2 contains media, the heavy-duty slots 123 are used for lifting. By providing reinforcing ribs 125 above the heavy-duty slots 123, the tank body 2 can be well supported and protected during lifting, thus extending the service life of the tank body 2. The reason for setting two sets of slots is that when the tank 2 contains a heavy medium, if the light load slot 124 is used, the tank 2 may deform due to the large weight at both ends, which may affect the performance of the tank 2. The heavy load slot 123 is located on both sides of the light load slot 124, closer to the ends of the tank 2. Using the heavy load slot 123 can provide better support at both ends of the tank 2, and with the support and protection of the reinforcing rib 125, it can prevent the tank 2 from deforming.

[0041] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details have been omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0042] In the description of this application, it should be noted that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "fit" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a direct link or an indirect link through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A tank container, characterized in that, include: The frame (1) includes columns (11) and beams (12), wherein there are at least four columns (11) and the beams (12) include a top beam (121) and a bottom beam (122); Tank (2), installed in the frame (1), the tank (2) includes a cylinder (21) and end caps (22) at both ends of the cylinder (21), the upper end of the tank (2) is provided with a safety valve (3), the safety valve (3) is connected to the gas phase space inside the tank (2); The maintenance manhole includes a top maintenance manhole (41) and an end maintenance manhole (42). The top maintenance manhole (41) is located at the top of the tank body (2), and the end maintenance manhole (42) is located on the end cap (22). The end maintenance manhole (42) is located below the center point of the end cap (22). The end maintenance manhole (42) extends outward from the end cap (22) to form a connecting ring (421). The connecting ring (421) is provided with an end manhole cover (422) hinged to it. An end sealing ring is provided at the position where the inner surface of the end manhole cover (422) contacts the connecting ring (421). The upper width of the connecting ring (421) is smaller than the lower width. The walkway (5) is located at the top of the frame (1). The walkway (5) consists of a fixed walkway (51) and a movable walkway (52). The movable walkway (52) is located above the safety valve (3) and the top maintenance manhole (41). One end of the movable walkway (52) is hinged to the top beam (121), and the other end is opened and locked by a switch on the top beam (121).

2. The tank container according to claim 1, characterized in that, The frame (1) has a crash plate (6) on its side, and the crash plate (6) has a cross-shaped structure.

3. The tank container according to claim 1, characterized in that, The upper end of the column (11) is provided with a lifting lug (7), which is fixedly connected to the column (11).

4. The tank container according to claim 1, characterized in that, The top maintenance manhole (41) includes at least one, and the top maintenance manhole (41) is provided with a top manhole cover (411) at its upper end. One end of the top manhole cover (411) is hinged to the tank body (2). The top manhole cover (411) is provided with an opening (412) at its center. The top manhole cover (411) is provided with a top manhole inner cover (413) hinged to the opening (412).

5. The tank container according to claim 1, characterized in that, A liquid collection tray (8) is provided directly below the end inspection manhole (42), and the liquid collection tray (8) is fixed on the bottom crossbeam (122).

6. The tank container according to claim 1, characterized in that, The upper end of the tank (2) is also provided with a gas phase ball valve (9), the upper end of the gas phase ball valve (9) is provided with an air inlet cover, and the movable walkway (52) is provided above the gas phase ball valve (9).

7. The tank container according to claim 1, characterized in that, It also includes a ladder (10) located on the side of the frame (1).

8. The tank container according to claim 1, characterized in that, The angle between the line connecting the uppermost and lowermost connection points of the connecting ring (421) and the end cap (22) and the horizontal plane is 55-75 degrees.

9. The tank container according to claim 1 or 6, characterized in that, The switch includes an L-shaped locking shaft (521), a front fixing piece (522) and a rear fixing piece (523) fixed to the top crossbeam (121). Both the front fixing piece (522) and the rear fixing piece (523) have circular holes (528) through which the L-shaped locking shaft (521) can pass. An upper limit post (524) and a lower limit post (525) are provided between the front fixing piece (522) and the rear fixing piece (523). The upper limit post (524) and the lower limit post (525) are fixed to the top crossbeam (121). The distance between the upper limit post (524) and the lower limit post (525) is greater than the diameter of the L-shaped locking shaft (521). The L-shaped locking shaft (521) has a... Two symmetrical protrusions (526), ​​a spring (527) is provided on the L-shaped locking shaft (521) between the protrusions (526) and the rear fixing piece (523), the diameter of the round hole (528) is larger than the diameter of the L-shaped locking shaft (521) and smaller than the diameter of the spring (527), the height of the protrusions (526) is smaller than the distance between the L-shaped locking shaft (521) and the top crossbeam (121), an L-shaped baffle (529) is provided on the movable walkway (52), the L-shaped baffle (529) includes a vertical plate (530) and a horizontal plate (531), the vertical plate (530) is fixed on the movable walkway (52), and the upper surface of the horizontal plate (531) is lower than the L-shaped locking shaft (521).

10. The tank container according to claim 1, characterized in that, The bottom crossbeam (122) is provided with slots, including heavy-duty slots (123) and light-duty slots (124). The heavy-duty slots (123) are located on both sides of the light-duty slots (124). A reinforcing rib (125) is provided above the heavy-duty slots (123). One end of the reinforcing rib (125) is fixedly connected to the tank body (2), and the other end is fixedly connected to the bottom crossbeam (122).

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