Tank container with split skirt

Abstract

The utility model relates to a tank container with a split skirt, which solves the technical problems that the existing straight skirt is large in dead weight, high in assembly difficulty, complex in structure, unfavorable for load transmission, poor in structural stress condition and easy to generate stress concentration and fatigue. The device comprises a frame, a tank body and a split skirt for connecting the frame and the tank body, the end frames of the framework are formed by alternately enclosing cross beams and corner columns and are connected through corner fittings; inclined struts are arranged in the end frames; the split type skirt is of an annular structure with a notch, the small-diameter end of the split type skirt is connected with the peripheral face of one end of the tank body, and the large-diameter end of the split type skirt is connected with the inclined strut or the corner column. By means of the structure, transmission of longitudinal force is more direct, and the stress condition is obviously improved. In addition, the complexity of the connecting structure is reduced, the overall self weight is reduced, the safety of the whole machine is improved, meanwhile, light weight is achieved, and the economical efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to containers, specifically to a tank container with a segmented skirt. Background Technology

[0002] As a mode of transport for bulk cargo, containers can organize combined transport between different modes of transport and conduct "door-to-door" transport, accelerating vehicle and ship turnaround, speeding up cargo arrival, and improving the overall efficiency of cargo transportation. Tank containers are mainly composed of tanks, frames, walkways, and other components. If the loaded medium has heating and insulation functions, it should also have heating and insulation components.

[0003] In tank containers, the tank body and frame are mainly connected by skirts or saddles. For 20-foot tank containers, saddles are not necessary, so for economic reasons, lightweight skirt structures are mostly used to connect the tank body and frame.

[0004] Most existing tank container skirts are designed as straight-tube skirts to accommodate large-capacity tank containers with large tank diameters that match the frame dimensions. These tank containers are primarily used for transporting low-density media, such as light oils, edible oils, and alcohols. However, for high-density media, straight-tube skirts have some drawbacks.

[0005] like Figures 1-2 As shown, due to limitations in total container weight and tank filling capacity, there is no need to increase the volume of tank containers when the medium density is high. Therefore, the tank 100 is generally designed with a smaller diameter. In this case, when a straight-tube skirt 200 is used to connect it to the frame 300, multiple diagonal braces 303 are required at the connection point. These multiple diagonal braces 303 need to overlap to fit the small outer circumference of the tank 100. This results in a complex end frame structure of the frame 300, a large self-weight, and difficult assembly. In addition, during transportation, the longitudinal force is mainly transmitted to the corner pieces 301 and corner posts 302. However, the force of the straight-tube skirt 200 cannot be directly applied to the corner posts 302, resulting in a large bending moment in the longitudinal force. This has problems such as poor load transfer, poor structural stress, stress concentration, and fatigue, which are detrimental to the safe operation of tank containers. Utility Model Content

[0006] The purpose of this invention is to solve the technical problems of existing straight-tube skirt supports, such as large self-weight, difficult assembly, complex structure, and problems with load transfer, poor structural stress, stress concentration and fatigue. The invention provides a tank container with a segmented skirt support.

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] A tank container with a split skirt includes a frame and a tank body disposed within the frame; the end frame of the frame is alternately surrounded by two crossbeams and two corner posts, and the two are connected by corner brackets; multiple diagonal braces are provided inside the end frame.

[0009] Its special feature is:

[0010] It also includes a segmented skirt base, through which the tank body and the frame are connected;

[0011] One end of the diagonal brace inside the frame is connected to the crossbeam, and the other end is connected to the corner column;

[0012] The segmented skirt support is a ring structure with at least two notches evenly distributed, and the two ends of the ring structure have different diameters, forming a small diameter end and a large diameter end respectively; the small diameter end of the segmented skirt support is connected to the outer circumference of one end of the tank body, and the large diameter end is connected to the diagonal brace and the corner column.

[0013] When the number of notches is odd, at least one notch has its axial bisecting surface set in the vertical direction; when the number is even, at least two notches have their axial bisecting surfaces set in the vertical direction. The notches divide the segmented skirt into at least two segmented skirts, the same number as the number of notches.

[0014] Furthermore, the edges of the two separate skirt seats on both sides of the notch of the segmented skirt seat are provided with pointed points extending in the circumferential direction;

[0015] The apex is located at the small diameter end of the split skirt, causing the width of the notch to gradually decrease from the large diameter end to the small diameter end.

[0016] Furthermore, the extension length of the apex is 1 to 2% of the circumference of the small diameter end of the segmented skirt seat, so that the speed at which the width of the notch decreases from the large diameter end to the small diameter end gradually accelerates;

[0017] Definition: If the plane of the central axis of the segmented skirt seat and the edge of the large diameter end of the notch is taken as the reference plane, then the extension length of the cusp is the distance from the position of the reference plane at the edge of the small diameter end of the notch to the end of the cusp.

[0018] Furthermore, the segmented skirt seat is a conical or trumpet-shaped ring structure.

[0019] Furthermore, the diagonal brace is a straight rod.

[0020] Furthermore, there are four diagonal braces, corresponding to the four corners of the end frame.

[0021] Furthermore, the segmented skirt seat has two openings, dividing the segmented skirt seat into two separate skirt seats;

[0022] The two separate skirt supports are connected to diagonal braces at both ends and to corner posts in the middle.

[0023] Furthermore, the frame is compatible with 20-foot tank containers.

[0024] The advantages of this utility model compared to the prior art are:

[0025] 1. This utility model provides a tank container with a segmented skirt support. The segmented skirt support, with its two ends having different dimensions, allows direct connection between its two sides and the corner posts of the frame. The remaining parts only require connection via conventional diagonal braces. In other words, the connection position between the segmented skirt support and the frame allows forces to be directly applied to the corner posts, resulting in more direct transmission of longitudinal forces and a significant improvement in stress distribution. Furthermore, this connection method optimizes the connection structure between the tank body and the frame in small-diameter tank containers, reducing the complexity of the connection structure and lowering the overall weight. This improves overall safety while achieving lightweight design, further enhancing economic efficiency.

[0026] 2. This utility model provides a tank container with a segmented skirt. Considering its high overall center of gravity and the fact that the tank's centerline is lower than the frame's centerline, the original full-circle skirt is designed as a segmented skirt to prevent its outer edge from protruding from the frame. At the same time, the segmented skirt can further achieve weight reduction, thereby reducing the overall weight of the tank container and further improving its economic efficiency.

[0027] 3. The present invention provides a tank container with a segmented skirt support. Considering the load transfer of the segmented skirt support, sharp points are designed at both ends of the segmented skirt support to optimize the stress at the break point, improve the stress condition, avoid stress concentration and fatigue, improve the safety of the connection structure, and reduce quality risks. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the front end structure of an existing tank container with a straight-sided skirt.

[0029] Figure 2 This is a schematic diagram of the end side structure of an existing tank container with a straight-sided skirt.

[0030] Figure 1 , Figure 2 The reference numerals in the attached diagrams are: 100-tank body; 200-straight-cylindrical skirt support; 300-frame; 301-corner piece; 302-corner post; 303-diagonal brace.

[0031] Figure 3 This is a schematic diagram of the end front structure of an embodiment of a tank container with a segmented skirt according to the present invention;

[0032] Figure 4 This is a schematic diagram of the end side structure of an embodiment of the present invention;

[0033] Figure 5 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0034] Figure 6 This is a three-dimensional structural diagram of the segmented skirt seat in an embodiment of this utility model;

[0035] Figure 7 This is a schematic diagram of the setting position of the tip in an embodiment of the present utility model, wherein A is a schematic diagram of the structure without the tip and B is a schematic diagram of the structure with the tip.

[0036] Figure 8 yes Figure 7 The stress analysis diagram is shown, where A is the stress distribution without cusps and B is the stress distribution with cusps.

[0037] Figures 3-8 The reference numerals in the attached diagrams are: 10-tank body; 20-segmented skirt base; 30-frame; 31-corner piece; 32-corner post; 33-diagonal brace;

[0038] A - Centerline of the tank body, B - Centerline of the frame. Detailed Implementation

[0039] The specific technical solutions in the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0040] See Figures 3-5 This utility model provides a tank container with a segmented skirt design based on a 20-foot tank container, to solve the problems of complex connection structure, large self-weight, and poor stress distribution between the small-diameter tank and the frame when using tank containers to transport high-density media. In other embodiments of this utility model, larger tank containers require additional structures for vertical stress reinforcement.

[0041] This utility model embodiment includes a segmented skirt base 20, a frame 30, and a tank 10 disposed within the frame 30; the end frame of the frame 30 is alternately surrounded by two crossbeams and two corner posts 32, and the two are connected to each other by corner pieces 31; multiple diagonal braces 33 are provided inside the end frame; one end of the diagonal brace 33 inside the frame 30 is connected to the crossbeam, and the other end is connected to the corner post 32; the diagonal brace 33 is a straight rod and there are four of them, corresponding to the four corners of the end frame respectively.

[0042] The tank body 10 and the frame 30 are connected by a segmented skirt 20;

[0043] refer to Figure 6Considering the high center of gravity of the tank container and the fact that the tank's centerline A is lower than the frame's centerline B, and due to the required large taper, the entire conical skirt would fall outside the frame 30. Therefore, the skirt is designed as a segmented type. The segmented skirt 20 is a conical ring structure with two evenly spaced notches, and the two ends of this ring structure have different diameters, forming a small-diameter end and a large-diameter end respectively. The small-diameter end of the segmented skirt 20 is connected to the outer circumference of one end of the tank 10, and the large-diameter end is connected to the diagonal brace 33 and the corner column 32. The axial dividing surface of the notch is set in the vertical direction, dividing the segmented skirt 20 into two identical split skirts. The two ends of the two split skirts are connected to the diagonal brace 33, and the middle is connected to the corner column 32. In other embodiments of this utility model, there may be more split skirts, the number of which is determined according to different application scenarios and finite element strength analysis to adapt to different end frame structures.

[0044] refer to Figures 7-8 At the break point of the segmented skirt 20, stress concentration occurs due to the abrupt change in shape. Therefore, stress analysis was performed, and the shape of the cusp was designed and optimized. Specifically, both split skirt edges are provided with cusps extending circumferentially. The cusps are located at the smaller diameter end of the segmented skirt 20, causing the width of the notch to gradually decrease from the larger diameter end to the smaller diameter end, with the rate of decrease gradually accelerating. The extension length of the cusp is 1-2% of the circumference of the smaller diameter end of the segmented skirt 20. Definition: The plane passing through the central axis of the segmented skirt 20 and the edge of the larger diameter end of the notch is the reference plane (i.e., Figure 7 If the edges on both sides of the notch in -A are considered, then the extension length of the cusp is the distance from the position of the reference plane at the edge of the small diameter end of the notch to the end of the cusp.

[0045] The stress at the apex of the break can also be optimized by using other shapes or by adding a reinforcement structure.

[0046] The above description is merely an embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model. For those skilled in the art, it will be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tank container with a split skirt, comprising a frame (30) and a tank (10) disposed within the frame (30); the end frame of the frame (30) is alternately surrounded by two crossbeams and two corner posts (32), and the two are connected to each other by corner brackets (31); the end frame is provided with a plurality of diagonal braces (33); Its features are: It also includes a segmented skirt (20), through which the tank body (10) and the frame (30) are connected; One end of the diagonal brace (33) inside the frame (30) is connected to the crossbeam, and the other end is connected to the corner post (32); The segmented skirt support (20) is a ring structure with at least two notches evenly distributed, and the two ends of the ring structure have different diameters, forming a small diameter end and a large diameter end respectively; the small diameter end of the segmented skirt support (20) is connected to the outer circumference of one end of the tank body (10), and the large diameter end is connected to the diagonal brace (33) and the corner column (32); When the number of the notches is odd, at least one notch has its axial midpoint face set in the vertical direction; when the number is even, at least two notches have their axial midpoint faces set in the vertical direction. The notches divide the segmented skirt seat (20) into at least two segmented skirt seats, which is the same number as the number of notches.

2. A tank container with a segmented skirt as described in claim 1, characterized in that: The two split skirt edges on both sides of the notch of the split skirt seat (20) are provided with pointed points extending in the circumferential direction; The apex is located at the small diameter end of the segmented skirt (20), so that the width of the notch gradually decreases from the large diameter end to the small diameter end.

3. A tank container with a segmented skirt as described in claim 2, characterized in that: The extension length of the apex is 1 to 2% of the circumference of the small diameter end of the segmented skirt (20), so that the speed at which the width of the notch decreases from the large diameter end to the small diameter end gradually accelerates. Definition: The plane of the central axis of the split skirt seat (20) and the edge of the large diameter end of the notch is the reference plane. The extension length of the cusp is the distance from the position of the reference plane at the edge of the small diameter end of the notch to the end of the cusp.

4. A tank container with a segmented skirt as described in any one of claims 1-3, characterized in that: The segmented skirt seat (20) is a conical or trumpet-shaped ring structure.

5. A tank container with a segmented skirt as described in claim 4, characterized in that: The diagonal brace (33) is a straight rod.

6. A tank container with a segmented skirt as described in claim 5, characterized in that: There are four diagonal braces (33), which correspond to the four corners of the end frame respectively.

7. A tank container with a segmented skirt as described in claim 6, characterized in that: The segmented skirt seat (20) has two openings, dividing the segmented skirt seat (20) into two separate skirt seats; The two ends of the two split skirt seats are respectively connected to the diagonal brace (33), and the middle part is connected to the corner column (32).

8. A tank container with a segmented skirt as described in claim 7, characterized in that: The frame (30) is compatible with 20-foot tank containers.

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