Tank container with split skirt

Abstract

The invention relates to a tank container with a split type skirt, and solves the technical problems that an existing straight barrel type skirt is large in dead weight, large in assembly difficulty, complex in structure, not beneficial to load transmission, poor in structural stress condition and prone to 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] The invention relates to a container, in particular to a tank container with a split-flap skirt. Background Art

[0002] As a mode of transport for bulk cargo, containers can organize joint transport between different modes of transport and carry out "door-to-door" transport, speed up vehicle and ship turnover, speed up cargo arrival, and improve the efficiency of cargo transportation throughout the entire process. Tank containers are mainly composed of tank bodies, frames, walkways and other components. If the loaded medium has heating and insulation functions, it should also have heating and insulation components.

[0003] In a tank container, the tank body and the frame are mainly connected by a skirt or saddle. For a 20-foot tank container, a saddle is not a necessary part, so for economic considerations, most of them use a skirt structure that meets lightweight requirements to connect the tank body and the frame.

[0004] Most existing tank container skirts are designed as straight-tube skirts to meet the needs of large-volume tank containers with larger tank diameters and matching frame sizes. Such tank containers are mostly used to transport mediums with lower density, such as light oils, edible oils, alcohols, etc. However, for mediums with higher density, straight-tube skirts have some disadvantages.

[0005] like Figure 1-Figure 2 As shown, due to the limitation of the total weight of the standard container and the filling degree of the tank body, it is not necessary to enlarge the volume of the tank container when the medium density is large, so the tank body 100 is generally designed to be of a smaller diameter. At this time, when the straight-tube skirt 200 is used to connect it with the frame 300, the connection between the two needs to be connected by multiple diagonal braces 303, and the multiple diagonal braces 303 need to overlap each other to adapt to the smaller outer peripheral surface of the tank body 100, which will lead to a complex end frame structure of the frame 300, a large deadweight and difficulty in assembly; in addition, during transportation, the action point of longitudinal force transmission is mainly located on the corner piece 301 and the corner column 302, but the action force of the straight-tube skirt 200 cannot directly act on the corner column 302, so that the longitudinal force produces a large bending moment, which is not conducive to load transmission, poor structural stress, easy to produce stress concentration and fatigue, etc., which is not conducive to the safe use of the tank container. Summary of the invention

[0006] The purpose of the present invention is to solve the technical problems that the existing straight-tube skirt has a large dead weight, is difficult to assemble, has a complex structure, is not conducive to load transfer, has poor structural stress conditions, and is prone to stress concentration and fatigue, and to provide a tank container with a petal-type skirt.

[0007] In order to achieve the above purpose, the technical solution provided by the present invention is as follows:

[0008] A tank container with a split-flap skirt comprises a frame and a tank body arranged in the frame; the end frame of the frame is alternately surrounded by two cross beams and two corner columns, and the two are connected by corner pieces; a plurality of diagonal braces are arranged in the end frame;

[0009] Its special features are:

[0010] It also includes a split-petal skirt, through which the tank body and the frame are connected;

[0011] The diagonal braces in the frame are connected to the crossbeam at one end and to the corner column at the other end;

[0012] The petal-type skirt seat is an annular structure evenly provided with at least two notches, and the two ends of the annular structure have different diameters, respectively constituting a small diameter end and a large diameter end; the small diameter end of the petal-type skirt seat is connected to the outer peripheral surface 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 an odd number, the axial center plane of at least one notch is arranged along the vertical direction; when the number is an even number, the axial center planes of at least two notches are arranged along the vertical direction; the notches divide the petal-type skirt into at least two split skirts with the same number of notches.

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

[0015] The sharp point is located at the small diameter end of the split-flap skirt, so that the width of the notch gradually decreases from the large diameter end to the small diameter end.

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

[0017] Definition: The plane passing through the center axis of the petal-type skirt and the edge of the large diameter end of the notch is taken as the reference plane, and 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 petal-type skirt is a conical or trumpet-shaped annular 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 split-petal skirt has two notches, dividing the split-petal skirt into two split skirts;

[0022] The two split skirts are connected to the diagonal braces at both ends and to the corner columns in the middle.

[0023] Further, the frame is adapted to a 20-foot tank container.

[0024] The beneficial effects of the present invention compared with the prior art are as follows:

[0025] 1. The present invention provides a tank container with a split-petal skirt, which is designed with a split-petal skirt. Through the design of different sizes at its two ends, its two sides are directly connected to the corner columns of the frame, and the remaining parts only need to be connected through the commonly used diagonal braces, that is, the connection position of the split-petal skirt and the frame allows the force to act directly on the corner column, and the transmission of longitudinal force is more direct, thereby significantly improving the force condition. In addition, this connection method optimizes the connection structure between the tank body and the frame in a small-diameter tank container, reduces the complexity of the connection structure, and reduces the overall deadweight, while improving the safety of the whole machine. It achieves lightweight and further improves economic efficiency.

[0026] 2. The present invention provides a tank container with a petal-type skirt. Considering the problem that the overall center of gravity is relatively high and the center line of the tank body is lower than the center line of the frame, the original full-circle skirt is designed as a petal-type skirt to prevent its outer edge from protruding from the frame. At the same time, the petal-type skirt can further achieve lightweighting and reduce deadweight, thereby reducing the overall weight of the tank container and further improving the economic efficiency of the tank container.

[0027] 3. The present invention provides a tank container with a split skirt. For the split skirt, taking its load transfer into consideration, sharp points are designed at both ends of the split skirt, thereby optimizing the stress of the split skirt at the disconnection point, improving the stress condition, avoiding stress concentration and fatigue, improving the safety of the connection structure, and reducing quality risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the front structure of the end of an existing tank container with a straight skirt;

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

[0030] Figure 1 , Figure 2 The reference numerals in the drawings are: 100 - tank body; 200 - straight skirt; 300 - frame; 301 - corner fitting, 302 - corner column, 303 - diagonal brace.

[0031] Figure 3 It is a schematic diagram of the front structure of an end portion of a tank container embodiment of the present invention having a split-petal skirt;

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

[0033] Figure 5 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0034] Figure 6 1 is a schematic diagram of the three-dimensional structure of the petal-type skirt seat in an embodiment of the present invention;

[0035] Figure 7 Schematic diagram of the location of the sharp point in the embodiment of the present invention, wherein A is a schematic diagram of the structure without the sharp point, and B is a schematic diagram of the structure after the sharp point is set;

[0036] Figure 8 yes Figure 7 Stress analysis diagram, where A is the stress distribution without setting the cusp point, and B is the stress distribution after setting the cusp point.

[0037] Figure 3-Figure 8 The reference numerals in the figures are: 10-tank body; 20-petal skirt; 30-frame; 31-corner piece, 32-corner column, 33-diagonal brace;

[0038] A- tank centerline, B- frame centerline. DETAILED DESCRIPTION

[0039] The specific technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] See also Figure 3-Figure 5 The embodiment of the present invention provides a tank container with a petal-type skirt based on the design of a 20-foot tank container to solve the problem that the connection structure between the small-diameter tank body and the frame used in the tank container for transporting high-density media is complex, heavy, and poor in force. In other embodiments of the present invention, a larger-sized tank container requires additional structures for vertical force reinforcement.

[0041] The embodiment of the present invention includes a split skirt 20, a frame 30 and a tank body 10 arranged in the frame 30; the end frame of the frame 30 is alternately surrounded by two cross beams and two corner columns 32, and the two are connected by corner pieces 31; a plurality of diagonal braces 33 are arranged in the end frame; one end of the diagonal brace 33 in the frame 30 is connected to the cross beam, and the other end is connected to the corner column 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 via a petal-type skirt 20;

[0043] refer to Figure 6Considering the high center of gravity of the tank container and the problem that the center line A of the tank body is lower than the center line B of the frame, due to the large required taper, the entire circle of the conical skirt will fall outside the frame 30, so the skirt is designed to be a split-petal type. The split-petal skirt 20 is a conical annular structure evenly provided with two notches, and the two ends of the annular structure have different diameters, respectively constituting a small diameter end and a large diameter end; the small diameter end of the split-petal skirt 20 is connected to the outer peripheral surface 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; the axial center dividing surface of the notch is arranged in the vertical direction, dividing the split-petal skirt 20 into two left and right split skirts of the same structure. The two ends of the two split skirts are respectively connected to the diagonal brace 33, and the middle is connected to the corner column 32. In other embodiments of the present invention, there may also be a larger number of split skirts, and their number is determined according to different application scenarios combined with finite element strength analysis to adapt to end frames of different structures.

[0044] refer to Figure 7-Figure 8 At the disconnection point of the split skirt 20, stress concentration will occur due to the sudden change in shape, so a stress analysis was conducted on it, and the shape of the sharp point was designed and optimized. Specifically: the edges of the two split skirts are provided with sharp points extending along the circumferential direction; the sharp points are located at the small diameter end of the split skirt 20, so that the width of the notch gradually decreases from the large diameter end to the small diameter end, and the speed of decrease gradually accelerates. The extension length of the sharp point is 1 to 2% of the circumference of the small diameter end of the split skirt 20. Definition: The plane passing through the center axis of the split skirt 20 and the edge of the large diameter end of the notch is the reference plane (that is, Figure 7 -The edges on both sides of the notch in A), the extension length of the cusp is the distance from the edge of the notch minor diameter end of the reference plane to the end of the cusp.

[0045] The point stress at the break can also be optimized by using other shapes or by providing additional reinforcement structures.

[0046] The above description is only an embodiment of the present invention, and is not intended to limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tank container with a split skirt, comprising a frame (30) and a tank body (10) arranged in the frame (30); the end frame of the frame (30) is alternately surrounded by two cross beams and two corner columns (32), and the two are connected by corner pieces (31); a plurality of diagonal braces (33) are arranged in the end frame; Features: It also includes a petal-type skirt seat (20), and the tank body (10) and the frame (30) are connected via the petal-type skirt seat (20); One end of the diagonal brace (33) in the frame (30) is connected to the crossbeam, and the other end is connected to the corner column (32); The petal-type skirt seat (20) is an annular structure evenly provided with at least two notches, and the two ends of the annular structure have different diameters, respectively constituting a small diameter end and a large diameter end; the small diameter end of the petal-type skirt seat (20) is connected to the outer peripheral surface 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 an odd number, the axial center plane of at least one notch is arranged along the vertical direction; when the number is an even number, the axial center planes of at least two notches are arranged along the vertical direction; the notches divide the petal-type skirt (20) into at least two split skirts with the same number of notches.

2. A tank container with a split-flap skirt according to claim 1, characterized in that: The edges of the two split skirt seats on both sides of the notch of the split skirt seat (20) are both provided with sharp points extending in the circumferential direction; The pointed point is located at the small diameter end of the petal-type 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 split-flap skirt according to claim 2, characterized in that: The extension length of the pointed point is 1 to 2% of the circumference of the small diameter end of the petal-shaped skirt seat (20), so that the speed at which the notch width decreases from the large diameter end to the small diameter end gradually increases; Definition: The plane passing through the central axis of the petal-type skirt seat (20) and the edge of the large diameter end of the notch is the reference plane, and the extension length of the sharp point 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 sharp point.

4. A tank container with a split-petal skirt according to any one of claims 1 to 3, characterized in that: The petal-type skirt (20) is a conical or trumpet-shaped annular structure.

5. The tank container with a split-flap skirt according to claim 4, characterized in that: The diagonal brace (33) is a straight rod.

6. A tank container with a split-flap skirt according to claim 5, characterized in that: There are four diagonal braces (33), corresponding to the four corners of the end frame respectively.

7. The tank container with a split-flap skirt according to claim 6, characterized in that: The petal-type skirt seat (20) has two notches, dividing the petal-type skirt seat (20) into two separate skirt seats; The two split skirts are connected at both ends to the diagonal braces (33) respectively, and at the middle to the corner columns (32).

8. The tank container with a split-flap skirt according to claim 7, characterized in that: The frame (30) is adapted to a 20-foot tank container.

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