LNG dedicated tank container frame and tank container

Abstract

The present invention discloses a dedicated LNG tank container frame and a tank container. The dedicated LNG tank container frame includes two opposing end frames, each of which includes a rectangular frame formed by an upper end beam, a lower end beam, and two corner columns. A longitudinal beam is provided on the lower end beam, and a bottom diagonal brace is connected between the longitudinal beam and the corner piece. Four side beams are connected between the two end frames, each parallel to the other and perpendicular to the plane of the end frames. The four side beams are respectively connected to the four corners of the end frames. A first top side support and a second top side support welded to the top side beam are provided at positions dividing the top side beam into three equal parts. A first bottom side support and a second bottom side support welded to the bottom side beam are provided at positions dividing the bottom side beam into three equal parts. The present invention can not only protect the safety of the tank container structure on the side of the tank container, but also ensure its own structural safety, stability, and reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of logistics and transportation, and in particular relates to a special LNG tank container frame and a tank container. Background Art

[0002] At present, the main mode of transportation of natural gas is pipeline transportation, which is relatively expensive. The transportation of LNG (liquefied natural gas) has obvious advantages in transoceanic and interregional transportation. Shipping LNG by ship is not only low-cost, but also can effectively avoid the risks caused by laying natural gas pipelines. In addition, the purification and liquefaction of natural gas before transportation can effectively reduce harmful substances and be more environmentally friendly. Therefore, LNG tank containers that integrate railway, sea and road multimodal transportation have become an inevitable development trend in the natural gas transportation industry. Figure 1 As shown in the figure, the existing LNG tank container currently uses a frame structure consisting of end frames (A), supports (B), bottom diagonal braces (C), bottom longitudinal beams (D), corner pieces (E) and skirts (F), and its external dimensions comply with the requirements of ISO688: "Classification, dimensions and rated masses of series 1 containers" 1AA type container. Its main structure is shown in the attached figure. Figure 1 As shown. For the existing 40-foot LNG tank container (hereinafter referred to as the tank container) frame structure, the tank container is relatively long in the longitudinal direction. The use of a frame structure without side beams cannot provide comprehensive protection for the tank body. Therefore, in order to ensure the safe operation of the tank container throughout its life cycle, it is necessary to add side beams to its frame structure. Due to the long longitudinal length of the tank container, the addition of side beams will result in poor stiffness of the side beams themselves. The lowest natural frequency obtained through ANSYS modal calculations is low and easily resonates with the vibration frequency of the railway bogie, causing fatigue and damage to some structures. Therefore, in order to meet the requirements for the use of the tank container, it is necessary to ensure that the side beams have a certain stiffness and do not resonate with the vehicle body while adding side beams. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a LNG dedicated tank container frame and tank container, which can not only play the role of protecting the safety of the tank container structure on the side of the tank container, but also have a safe, stable and reliable structure itself.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An LNG tank container frame includes two opposing end frames, each end frame including two parallel, opposing transverse upper and lower end beams, two parallel, opposing vertical corner posts disposed between the upper and lower end beams, and corner fittings. The ends of the upper end beams and the upper ends of the two corner posts are connected by corner fittings, and the ends of the lower end beams and the lower ends of the two corner posts are connected by corner fittings, so that the upper end beams, the lower end beams, and the two corner posts form a rectangular frame. Two longitudinal beams are provided on the lower end beams, parallel to each other and perpendicular to the lower end beams, and bottom diagonal braces are connected between the longitudinal beams and the corner fittings.

[0006] Four side beams are connected between the two end frames, parallel to each other and perpendicular to the plane of the end frames. The four side beams are connected to the four corners of the end frames. Each side beam is formed by welding two short beams together. The welding method between the two short beams is butt welding, and the weld is at a 45-degree angle to the horizontal direction. The two side beams located above are top side beams, and the two side beams located below are bottom side beams.

[0007] A first top side support and a second top side support welded to the top side beam are provided at three equal parts of the top side beam; a first bottom side support and a second bottom side support welded to the bottom side beam are provided at three equal parts of the bottom side beam.

[0008] The present invention also includes the following technical features:

[0009] Specifically, the first top side support forms an angle of 3.25° with the horizontal direction, and the second top side support forms an angle of 5° with the vertical direction;

[0010] The first bottom side support forms an angle of 12.5° with the horizontal direction, and the second bottom side support forms an angle of 10° with the vertical direction.

[0011] Specifically, the corner fitting located at the top is the upper corner fitting, and the corner fitting located at the bottom is the lower corner fitting;

[0012] The side beam is a rectangular tube of 120×80×4mm. The 120mm side of the top side beam is in the vertical direction, and the end of the top side beam is welded to the upper corner piece and the corner column; the 80mm side of the bottom side beam is in the vertical direction, and the end of the bottom side beam is welded to the lower corner piece and the bottom diagonal brace.

[0013] Specifically, the end of the top beam is 15 mm away from the upper plane of the upper corner piece and 6 mm away from the side of the upper corner piece; the end of the bottom beam is 25 mm away from the lower plane of the lower corner piece.

[0014] Specifically, the first top side support, the second top side support, the first bottom side support and the second bottom side support are rectangular tubes with dimensions of 100×50×4 mm.

[0015] Specifically, the side wall of the first top side support having a 100 mm side is perpendicular to the extension direction of the side beam; the side wall of the second top side support having a 50 mm side is perpendicular to the extension direction of the side beam;

[0016] The side wall where the 50mm side of the first bottom side support is located is perpendicular to the extension direction of the side beam; the side wall where the 100mm side of the second bottom side support is located is perpendicular to the extension direction of the side beam.

[0017] Specifically, four diagonal braces are provided at the four corners of the end frame, and two ends of the diagonal braces are respectively welded to the upper part of the corner column and the upper end beam, or respectively welded to the lower part of the corner column and the lower end beam.

[0018] A tank container, comprising a tank body, wherein the tank body is placed in the LNG dedicated tank container frame;

[0019] The tank body is welded to the skirt through the head, the lower part of the tank body is welded to the longitudinal beam through the pad, and the skirt is welded to the end frame and four diagonal braces to achieve connection with the end frame;

[0020] Ends of the first top side support, the second top side support, the first bottom side support and the second bottom side support are all welded to the tank shell backing plate.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] (I) In the present invention, the tank container frame structure having top side beams and bottom side beams can provide relatively comprehensive protection for the tank body.

[0023] (II) Providing the first top side support, the second top side support, the first bottom side support, and the second bottom side support can effectively improve the lowest natural frequency of the tank container frame, thereby preventing the natural frequency of the tank container from being different from the serpentine and nodding vibration frequencies of the bogie under various load conditions, thereby avoiding resonance within the entire operating speed range.

[0024] (III) The structure is simple, the process performance is good and the influence on the stress distribution of the outer tank under complex working conditions is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an LNG tank container in the prior art, (a) is the main view, (b) is the left view, and (c) is the bottom view.

[0026] Figure 2 It is the front view of the present invention.

[0027] Figure 3 for Figure 2 Right view of .

[0028] Figure 4 for Figure 2 Bottom view of .

[0029] Figure 5 Schematic diagram of the side beam weld.

[0030] The meanings of the numbers in the figure are: 1-end frame, 2-longitudinal beam, 3-bottom diagonal brace, 4-side beam, 5-first top side support, 6-second top side support, 7-first bottom side support, 8-second bottom side support, 9-tank body, 10-skirt;

[0031] 11-end upper beam, 12-end lower beam, 13-corner column, 14-corner piece, 15-diagonal brace;

[0032] 41- top side beam, 42- bottom side beam. DETAILED DESCRIPTION

[0033] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0034] Example 1:

[0035] Following the above technical solution, Figures 2 to 5As shown, this embodiment provides a dedicated LNG tank container frame, including two opposite end frames 1, the end frame 1 includes two parallel and opposite transverse end upper beams 11 and end lower beams 12, two parallel and opposite vertical corner posts 13 and corner fittings 14 provided between the end upper beams 11 and the end lower beams 12; it is characterized in that the ends of the end upper beam 11 and the upper ends of the two corner posts 13 are connected by corner fittings 14, and the ends of the end lower beam 12 and the lower ends of the two corner posts 13 are connected by corner fittings 14, so that the end upper beam 11, the end lower beam 12 and the two corner posts 13 are surrounded by a rectangular frame; two longitudinal beams 2 are provided on the end lower beam 12, which are parallel to each other and perpendicular to the end lower beam 12, and a bottom is connected between the longitudinal beam 2 and the corner fittings 14. Diagonal brace 3; four side beams 4 parallel to each other and perpendicular to the plane of the end frame 1 are connected between the two end frames 1, and the four side beams 4 are respectively connected to the four corners of the end frame 1; each side beam 4 is formed by welding and splicing two short beams, and the welding method between the two short beams is butt welding. In order to avoid the splicing weld from bearing a large force in the direction of gravity, the weld is 45° to the horizontal direction. The two side beams 4 located above are top side beams 41, and the two side beams 4 located below are bottom side beams 42; a first top side support 5 and a second top side support 6 welded to the top side beam 41 are provided at the three-part position of the top side beam 41; a first bottom side support 7 and a second bottom support 8 welded to the bottom side beam 42 are provided at the three-part position of the bottom side beam 42. Since the top side beam 41 and the bottom side beam 42 are long, have insufficient rigidity, and have a low minimum natural frequency, they are prone to resonate with the bogie during transportation, causing fatigue damage in some areas. Therefore, this embodiment adds a first top side support 5, a second top side support 6, a first bottom side support 7, and a second bottom side support 8 of a rectangular tube with dimensions of 100×50×4mm to improve the minimum natural frequency of the top side beam 41 and the bottom side beam 42 to ensure transportation safety.

[0036] The first top support 5 forms an angle of 3.25° with the horizontal direction, and the second top support 6 forms an angle of 5° with the vertical direction; the first bottom support 7 forms an angle of 12.5° with the horizontal direction, and the second bottom support 8 forms an angle of 10° with the vertical direction. In order to minimize the impact of the added first top support 5, second top support 6, first bottom support 7, and second bottom support 8 on the tank body 9 in the event of an accidental collision, the first top support 5 forms an angle of 3.25° with the horizontal direction, and the second top support 6 forms an angle of 5° with the vertical direction; the first bottom support 7 forms an angle of 12.5° with the horizontal direction, and the second bottom support 8 forms an angle of 10° with the vertical direction. ANSYS analysis and calculations show that this installation method results in less stress on the pad at the connection between the shell and the support under railway transportation conditions.

[0037] The corner fitting 14 located above is the upper corner fitting, and the corner fitting 14 located below is the lower corner fitting; the side beam 4 is a rectangular tube of 120×80×4mm, the 120mm side of the top side beam 41 is in the vertical direction, and the end of the top side beam 41 is welded to the upper corner fitting and the corner column 13; the 80mm side of the bottom side beam 42 is in the vertical direction, and the end of the bottom side beam 42 is welded to the lower corner fitting and the bottom diagonal brace 3.

[0038] The end of the top side beam 41 is 15 mm away from the upper plane of the upper corner fitting and 6 mm away from the side of the upper corner fitting; the end of the bottom side beam 42 is 25 mm away from the lower plane of the lower corner fitting.

[0039] The first top support 5 , the second top support 6 , the first bottom support 7 and the second bottom support 8 are rectangular tubes with dimensions of 100×50×4 mm.

[0040] The side wall where the 100mm side of the first top side support 5 is located is perpendicular to the extension direction of the side beam 4; the side wall where the 50mm side of the second top side support 6 is located is perpendicular to the extension direction of the side beam 4; the side wall where the 50mm side of the first bottom side support 7 is located is perpendicular to the extension direction of the side beam 4; the side wall where the 100mm side of the second bottom side support is located is perpendicular to the extension direction of the side beam 4.

[0041] Four diagonal braces 15 are provided at the four corners of the end frame 1. The ends of the braces 15 are welded to the upper portions of the corner posts 13 and the upper end beam 11, or to the lower portions of the corner posts 13 and the lower end beam 12. In this embodiment, the angles between the braces 15, the upper end beam 11, and the corner posts 13 to which they are connected, are all 45°. The angles between the braces 15, the lower end beam 12, and the corner posts 13 to which they are connected, are also all 45°.

[0042] Example 2:

[0043] Following the above technical solution, this embodiment provides a tank container comprising a tank body 9 placed within the LNG-dedicated tank container frame of Example 1. The tank body 9 is welded to a skirt 10 via a head, the lower portion of the tank body 9 is welded to a longitudinal beam 2 via a backing plate, and the skirt 10 is connected to the end frame 1 by welding to four diagonal braces 15. The ends of the first top support 5, the second top support 6, the first bottom support 7, and the second bottom support 8 are all welded to the outer shell backing plate of the tank body 9. More specifically, a support is provided below the tank body 9.

Claims

1. A dedicated LNG tank container frame, comprising two opposite end frames (1), wherein the end frames (1) include two parallel and opposite transverse end upper beams (11) and end lower beams (12), two parallel and opposite vertical corner posts (13) and corner fittings (14) provided between the end upper beams (11) and the end lower beams (12); characterized in that: The two ends of the end upper beam (11) and the upper ends of the two corner columns (13) are connected by corner pieces (14), and the two ends of the end lower beam (12) and the lower ends of the two corner columns (13) are connected by corner pieces (14); two longitudinal beams (2) are provided on the end lower beam (12) and are parallel to each other and perpendicular to the end lower beam (12); a bottom diagonal brace (3) is connected between the longitudinal beams (2) and the corner pieces (14); Four side beams (4) are connected between the two end frames (1) and are parallel to each other and perpendicular to the plane where the end frames (1) are located. The four side beams (4) are respectively connected to the four corners of the end frames (1); each side beam (4) is formed by welding and splicing two short beams, and the welding method between the two short beams is butt welding, and the weld is at 45 degrees to the horizontal direction. The two side beams (4) located above are top side beams (41), and the two side beams (4) located below are bottom side beams (42); A first top side support (5) and a second top side support (6) welded to the top side beam (41) are provided at three equal parts of the top side beam (41); a first bottom side support (7) and a second bottom side support (8) welded to the bottom side beam (42) are provided at three equal parts of the bottom side beam (42); The first top side support (5) forms an angle of 3.25° with the horizontal direction, and the second top side support (6) forms an angle of 5° with the vertical direction; The first bottom side support (7) forms an angle of 12.5° with the horizontal direction, and the second bottom side support (8) forms an angle of 10° with the vertical direction; The corner piece (14) located at the top is an upper corner piece, and the corner piece (14) located at the bottom is a lower corner piece; The side beam (4) is a rectangular tube of 120×80×4 mm, the 120 mm side of the top side beam (41) is in the vertical direction, and the end of the top side beam (41) is welded to the upper corner piece and the corner column (13); the 80 mm side of the bottom side beam (42) is in the vertical direction, and the end of the bottom side beam (42) is welded to the lower corner piece and the bottom diagonal brace (3); The first top side support (5), the second top side support (6), the first bottom side support (7) and the second bottom side support (8) are rectangular tubes with dimensions of 100×50×4 mm.

2. The LNG dedicated tank container frame according to claim 1, characterized in that: The end of the top side beam (41) is 15 mm away from the upper plane of the upper corner piece and 6 mm away from the side of the upper corner piece; the end of the bottom side beam (42) is 25 mm away from the lower plane of the lower corner piece.

3. The LNG dedicated tank container frame according to claim 1, characterized in that: The side wall where the 100mm side of the first top side support (5) is located is perpendicular to the extension direction of the side beam (4); the side wall where the 50mm side of the second top side support (6) is located is perpendicular to the extension direction of the side beam (4); The side wall where the 50mm side of the first bottom side support (7) is located is perpendicular to the extension direction of the side beam (4); and the side wall where the 100mm side of the second bottom side support (8) is located is perpendicular to the extension direction of the side beam (4).

4. The LNG dedicated tank container frame according to claim 1, characterized in that: Four diagonal braces (15) are provided at the four corners of the end frame (1), and the two ends of the diagonal braces (15) are respectively welded to the upper part of the corner column (13) and the end upper beam (11), or respectively welded to the lower part of the corner column (13) and the end lower beam (12).

5. A tank container, comprising a tank body (9), characterized in that: The tank body (9) is placed in the LNG dedicated tank container frame according to any one of claims 1 to 4; The tank body (9) is welded to the skirt seat (10) through the head, the lower part of the tank body (9) is welded to the longitudinal beam (2) through the pad, and the skirt seat (10) is welded to the end frame (1) and four diagonal braces (15) to achieve connection with the end frame (1); Ends of the first top side support (5), the second top side support (6), the first bottom side support (7) and the second bottom side support (8) are all welded to the outer shell pad of the tank body (9).

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