WO2024031874A1 - Concentrated sulfuric acid tank container with total weight of 70 tons - Google Patents

Abstract

Disclosed in the present invention is a concentrated sulfuric acid tank container with the total weight of 70 tons. The concentrated sulfuric acid tank container comprises a tank body, a frame and a walking board structure, the tank body comprising a cylinder body and an end portion head, a plurality of reinforcing rings being provided outside the cylinder body, a surge plate being provided in the cylinder body, and the head being connected to an end frame by means of a skirt; the frame comprises a bottom structure and end frames at the two ends thereof, and each end frame is of a square structure provided with four high-strength corner castings at the four corners; the bottom structure comprises bottom side beams, two groups of bottom longitudinal beams, bottom inclined supports and bottom side beam inclined supports; and the walking board structure comprises triangular support assemblies, full-length channel steel, full-length angle steel, U-shaped bent pieces, short angle steel I, short angle steel II, longitudinal walkways, transverse walkways, end supporting pieces I, end supporting pieces II and L-shaped bent pieces. The present invention is suitable for series 1 containers, especially for overweight containers; and the connection between the tank and the frame of the structure is more compact, improving the longitudinal and transverse impact resistance of tank containers.

Description

A concentrated sulfuric acid tank container with a total weight of 70 tons Technical field

The invention belongs to the technical field of tank container transportation equipment and relates to a concentrated sulfuric acid tank container with a total weight of 70 tons.

Background technique

With the diversified development of market demand, personalized customization of tank containers will gradually become an indispensable part of the transportation equipment industry, and overweight containers are part of it. For 20-foot tanks carrying high-density media or 40-foot tanks for general-density media, the total design weight of overweight containers on the market is mostly 35 tons or 36 tons. The corresponding corner pieces, frame structures, tank-frame connection structures, etc. have been Gradually develop into a mature structure.

For a 40-foot tank container carrying high-density media, the total design weight is far more than 36 tons. For example, this time a tank container with a total weight of 70 tons was designed according to user requirements, which is 2.3 times the rated mass of the standard container. Therefore, its corner piece design, frame structure design, tank and frame connection structure design, etc. will face new challenges.

Tank containers with a total design weight of 70 tons are relatively rare both at home and abroad. This is the first time that a tank container has been designed, tested and delivered to a specific user in China. There is currently no mature experience in the country to draw on for the design technology of an overweight tank container with a total weight of 70 tons.

Contents of the invention

In view of the shortcomings in the prior art, the purpose of the present invention is to provide a concentrated sulfuric acid tank container with a total weight of 70 tons. The total design weight of the tank container is 70 tons. The design of the tank container requires full consideration of roads, railways, waterways and their The inertial load generated during the intermodal transportation process must also meet multiple type tests stipulated in the standard. The inertial load and test load are much greater than the load that ordinary standard containers need to bear. Some tests require counterweights up to 140 tons. The test load is more than twice that of ordinary standard containers. At the same time, the frame structure also needs to consider lightweight and safety. The key technologies that need to be solved mainly include the strength, stiffness and stability of corner pieces, frames, tank-frame connection structures, etc.

In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve:

A concentrated sulfuric acid tank container with a total weight of 70 tons, including a tank body, frame and walkway structure;

The tank includes a cylinder and an end head. On the top of the cylinder, there are multiple overflow boxes arranged in sequence along the longitudinal direction of the cylinder. There are multiple reinforcing rings on the outside of the cylinder and a support is provided on the lower end of the reinforcing ring. , there is a wave-proof board inside the cylinder, and the head and the frame are connected by a skirt;

The frame includes a bottom structure and end frames at both ends, wherein the end frame is a square structure, including a horizontal upper end beam and a lower end beam, vertical left corner columns and right corner columns located between the upper end beam and the lower end beam. Four corner pieces at the four corners of the end frame; the bottom structure includes two bottom side beams, two sets of bottom longitudinal beams, bottom diagonal braces and bottom side beam diagonal braces. The two bottom side beams are parallel to each other and connected to the two end frames. Two sets of bottom longitudinal beams are located between the two bottom side beams and are respectively connected to the lower middle positions of the two end frames. Each bottom longitudinal beam is provided with a bottom diagonal brace on both sides, and the bottom diagonal brace connects the bottom longitudinal beam and the end frame. The corner piece at the lower end of the frame, the two ends of the diagonal brace of the bottom side beam are respectively connected to the inner wall of the bottom side beam and the support, and the bottom longitudinal beam is connected to the bottom of the cylinder above it;

The walking platform structure includes triangular support components, full-length channel steel, full-length angle steel, U-shaped bending parts, short angle steel I, short angle steel II, longitudinal walkways, transverse walkways, end supports I, end supports II and L type bending piece; the triangular support assembly includes a horizontal piece and an inclined piece, one end of the horizontal piece and one end of the inclined piece are connected at the top corner, and the other end of the horizontal piece and the other end of the inclined piece are both fixed on the overflow box; triangle The support components are fixed on the front and rear walls of the overflow box. Two sets of triangular support components are symmetrically provided on both ends of the front wall of the overflow box. Two sets of triangular support components are symmetrically provided on both ends of the rear wall of the overflow box; full-length channel steel The full-length channel steel and the full-length angle steel are welded to the horizontal members of the triangular support assembly. The full-length channel steel and the full-length angle steel are parallel to each other and are arranged longitudinally along the tank container. The full-length channel steel is located in the middle of the horizontal member, and the full-length angle steel is close to the triangular support assembly. The top corner part; the U-shaped bending piece is connected between the full-length channel steel and the full-length angle steel, and the tops of the full-length channel steel, U-shaped bending piece and full-length angle steel are flush; the short angle steel I is fixed close to the tank On the side wall of the full-length channel steel in the center of the box, the upper surface of the short angle steel I is flush with the top of the full-length channel steel; the longitudinal walkway is installed on the U-shaped bending piece and the upper surface of the full-length angle steel; the transverse walkway is installed on the short angle steel I , and a short angle steel I is provided at each of the four corners of the transverse walkway.

The invention also includes the following technical features:

Specifically, the bottom longitudinal beam is a U-shaped bending structure with an opening facing upward, including the bottom surface of the bottom longitudinal beam and the sides of the two bottom longitudinal beams; the two ends of the bottom longitudinal beam are respectively connected to the inner wall of the middle part of the lower end beam and the longitudinal beam baffle. The longitudinal beam baffle is perpendicular to the bottom surface of the bottom longitudinal beam and vertically connected to the sides of the bottom longitudinal beam on both sides;

The two ends of the bottom diagonal brace are respectively connected to the corner pieces of the sides of the bottom longitudinal beam and the end of the lower end beam of the end frame. A longitudinal beam stiffener located in the bottom longitudinal beam is provided at the joint between the bottom diagonal brace and the bottom longitudinal beam. The longitudinal beam stiffeners are parallel to the longitudinal beam baffles, and both ends of the longitudinal beam stiffeners are connected to the inner wall of the side of the bottom longitudinal beam. There are two longitudinal beam stiffeners and they are parallel to each other;

The upper end of the side of the bottom longitudinal beam is connected to the lower part of the barrel, and the upper end of the longitudinal beam baffle is connected to the lower part of the reinforcing ring;

There are multiple groups of bottom side beam diagonal braces, and each group of bottom side beam diagonal braces is symmetrically arranged on two bottom side beams.

Specifically, end frame diagonal braces are respectively provided inside the four corners of the end frame, and vertical end ladders are connected between the upper end beam and the lower end beam of the end frame; guard plates are provided at the four corners of the end frame.

Specifically, the wave-proof board includes multiple sets of wave-proof board assemblies located in the cylinder. The wave-proof board assembly includes a wave-proof board body, a wave-proof board backing plate and a reinforcing rib plate;

The anti-wave plate backing plate has an arc-shaped structure, and the anti-wave plate backing plate is tightly fixed on the inner wall of the cylinder;

The body of the wave-proof board has a corrugated plate structure. The edges of the body of the wave-proof board are arc edges and straight edges. The arc edges of the body of the wave-proof board are close to and fixed on the backing plate of the wave-proof board;

The reinforcing rib plate has a T-shaped structure, and the reinforcing rib plate is fixed at the connection between the straight edge end of the wave-proof board body and the wave-proof board pad;

Two adjacent groups of wave-proof plate assemblies are located on both sides of the vertical section passing through the central axis of the barrel, and the adjacent two groups of wave-proof plate assemblies are arranged sequentially along the axial direction of the barrel so that the two groups of wave-proof plate assemblies are dislocated. .

Specifically, an unloading groove is provided at the connection between the wave-proof plate body and the wave-proof plate backing plate, and an unloading groove is provided on the straight edge of the wave-proof plate body;

Bend the body of the wave-proof board at a distance of 50 to 80 mm from the straight edge of the body of the wave-proof board. The bending crease is parallel to the straight edge of the body of the wave-proof board;

The body of the wave prevention plate is an integrated structure, including a first arc section, a straight section, a second arc section and a bent section; the first arc section and the second arc section are in opposite directions, and the bent section is The bending direction is opposite to the direction of the second arc segment, and the creases of the straight segment, the bent segment and the straight edge of the wave-proof board body are all parallel;

The arc radius of the first arc segment and the second arc segment is 400-600mm, and the straight side length of the wave-proof plate body is 90-120mm;

The angle between the straight edges of the wave-proof board bodies of two adjacent groups of wave-proof board assemblies is 10° to 15° to form a V-shaped gap between the two adjacent groups of wave-proof board assemblies;

The two ends of the anti-wave plate backing plate are circular ends, and the diameter of the circular end is larger than the width of the anti-wave plate backing plate.

Specifically, the corner piece is a rectangular box-shaped structure, including two bottom surfaces and four side surfaces, wherein one bottom surface and two side surfaces at the common vertex are respectively the bottom surface I provided with the bottom hole and the end surface I provided with the end hole. And the side I with the side hole, the other bottom surface and the other two sides at the same vertex are the bottom surface II, the end surface II and the side surface II respectively; the end surface I is opposite to the end surface II, and the side surface I is opposite to the side surface II;

The bottom hole, end hole and side hole are all waist-shaped holes, the long axis of the bottom hole is perpendicular to the end surface I, the long axis of the side hole and the end hole are perpendicular to the bottom surface I; the long axis of the bottom hole is parallel to the can body Axial direction; the thickness of bottom surface I is 28.5mm, the thickness of bottom surface II is 20mm, and the thickness of end surface I and end surface II is both 20.5mm.

Specifically, the corner piece is divided into a top corner piece and a bottom corner piece, the top corner piece is divided into a left top corner piece and a right top corner piece, and the left top corner piece and the right top corner piece are symmetrical, and the bottom corner piece is The corner pieces are divided into left and right bottom corner pieces, and the left and right bottom corner pieces are symmetrical;

The bottom surface II of the left top corner piece is welded to the top of the left corner post, and the side surface II of the left top corner piece is welded to one end of the upper end beam; the bottom surface II of the right top corner piece is welded to the top of the right corner post, and the side surface of the right top corner piece is welded to the top of the right corner post. II is welded to the other end of the upper end beam;

The bottom surface II of the left bottom corner piece is welded to the bottom end of the left corner column, the side surface II of the left bottom corner piece is welded to one end of the lower end beam, the end face II of the left bottom corner piece is welded to the end of the bottom diagonal brace; the right bottom corner The bottom surface II of the right corner piece is welded to the bottom end of the right corner column, the side surface II of the right bottom corner piece is welded to the other end of the lower end beam, and the end surface II of the right bottom corner piece is welded to the end of the bottom diagonal brace.

The outer dimensions of the top corner piece are 178x162x118mm; the outer dimensions of the bottom corner piece are 188x162x128mm;

The long axis length of the bottom hole is 124mm, and the short axis length is 63.5mm; the long axis length of the end hole and the side hole is 79.5mm, and the short axis length is 51mm;

The bottom hole is provided with an orifice chamfer.

Specifically, the end of the full-length channel steel is connected to the end support I welded to the lower surface of the upper end beam through bolts;

The full-length angle steel and the L-shaped bending piece welded to the top corner of the triangular support component are welded to form a square cross-section;

The L-shaped bending piece is supported by the end support II welded to the inner end face of the corner column of the tank;

The end of the full-length angle steel, the L-shaped bending piece and the end support II are connected by bolts;

Welding between the triangular support component and the overflow box;

The longitudinal walkway is connected to the U-shaped bending piece and the full-length angle steel through bolts; the transverse walkway and the short angle steel I are connected through bolts;

Welding between the short angle steel I and the full-length channel steel;

The short angle steel II is welded and fixed on the side wall of the full-length channel steel close to the full-length angle steel. The upper surface of the short angle steel II is flush with the top of the full-length channel steel; the lower surface of the longitudinal walkway near the middle of one end of the full-length channel steel passes through the short angle steel. II is supported and the two are connected by bolts.

Specifically, a handrail is provided on the outer wall of the full-length angle steel, and the handrail is foldable;

The handrail includes three vertical handrails and a horizontal handrail. The vertical handrail is an L-shaped steel pipe bent piece and includes a vertical part and a horizontal part. The horizontal handrail is connected to the top of the vertical parts of the three vertical handrails. The horizontal part of the handrail vertical bar is installed vertically in the support plate hole on the full-length angle steel, so that the vertical part of the handrail vertical bar can rotate from vertical to horizontal to achieve folding, and the handrail vertical bar and the handrail cross bar are hinged.

Compared with the existing technology, the present invention has the following technical effects:

(1) The tank and frame connection structure of the present invention is suitable for Series 1 containers, especially overweight containers; this structure can effectively utilize the longitudinal stiffness of the tank itself, making the connection between the tank and the frame more compact, and improving the longitudinal and transverse impact resistance of the tank container. ability. The corner piece of the invention is suitable for all series 1 containers with a total design weight not exceeding 70 tons, and the material and manufacturing costs are low. The frame structure of the present invention is suitable for 40-foot tank containers. The frame structure has good strength, stiffness and anti-instability ability, and has a low self-weight. It has a certain guiding role in the lightweight design of tank container structures.

(2) The wave-proof board of the present invention can effectively increase the contact area between the liquid and the wave-proof board, thereby reducing the overall stress of the wave-proof board; and the wave structure of the cross-section is composed of arcs, straight segments and bends, which reduces the manufacturing cost. Difficulty. The wave-proof board is bent near the straight edge section, and unloading grooves are provided on the wave-proof board and reinforced ribs are added, which can effectively improve the local stress of the wave-proof board.

(3) The corner fitting of the present invention has a wide application range: it is suitable for Series 1 containers with a total design weight of no more than 70 tons: standard containers with a total design weight of 30,480kg, ordinary overweight containers of 30 to 36 tons, and 36 to 70 tons. Extra large heavy box. Convenient manufacturing, low cost, and good versatility: The corner piece adopts a box structure, which is easy to cast, and each hole meets the requirements of ISO1161. Universal locks, spreaders, etc. can be used during use. Corner piece of the present invention: For ultra-large heavy boxes with a total weight of more than 36 tons and not more than 70 tons, the corner piece can be used directly, shortening the research and development cycle and reducing research and development costs.

(4) The walking platform structure of the present invention does not require upper side beams, so it is not limited by the tank structure, and because the upper side beams are reduced, the weight of the tank container is reduced; taking the preferred structural example of the present utility model as an example, the walking platform structure The installation method of using a welded triangular support component on the side wall of the overflow box as the main load-bearing component, and setting full-length angle steel, U-shaped bending parts and full-length channel steel assembly weldments on it is compared to having upper side beams as the walkway. The weight of the walking platform structure, which is the main load-bearing component, has been reduced by at least 88KG. The triangular support assembly of the present invention is made of standard hot-rolled section steel, such as angle steel or channel steel, and has the advantages of uniform size and high structural stability. It has been verified through experiments that after the triangular support assembly is welded to the side wall of the overflow box, the welding The assembled weldments on the upper end surface (full-length angle steel, U-shaped bending pieces and full-length channel steel assembly weldments) and the structure after installation of the walkway can meet the national standard requirements and bear a load of 300kg on an area of 300mmX600mm. The walking platform structure of the present invention uses the welded triangular support on the side wall of the overflow box as the main bearing component. For the structure of the tank box with no upper side beam and an insulated tank, it is avoided that when the welded support member on the tank extends out of the insulated shell, the insulated shell will Problems include reduced strength, difficulty in manufacturing, and reduced thermal insulation performance of the tank. Therefore, the walking platform structure of the present utility model has the advantages of strong versatility, high structural stability, light weight, no need for opening holes in the insulation shell, and easy molding and manufacturing.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Figure 2 is a schematic diagram of the frame structure of the present invention.

Figure 3 is a schematic diagram of the overall structure of the wave-proof board of the present invention.

Figure 4 is a cross-sectional view of the body of the wave-proof plate according to the present invention.

Figure 5 is a schematic diagram of the left top corner piece of the present invention.

Figure 6 is a schematic diagram of the right top corner piece of the present invention.

Figure 7 is a schematic diagram of the left bottom corner piece of the present invention.

Figure 8 is a schematic diagram of the right bottom corner piece of the present invention.

Figure 9 is a schematic cross-sectional view of the right bottom corner piece of the present invention.

Figure 10 is a top view of the walking platform structure of the present invention.

FIG. 11 is a partial enlarged view along line A-A in FIG. 10 .

FIG. 12 is a partial enlarged view along direction B in FIG. 10 .

FIG. 13 is an enlarged partial cross-sectional view along line C-C in FIG. 10 .

Figure 14 is a partial enlarged view along direction D in Figure 10 .

The meaning of each label in the figure is:

1. Tank, 2. Frame, 3. Walking platform structure; 11. Cylinder, 12. Overflow box, 13. Reinforcement ring, 14. Support, 15. Wave protection plate, 16. Skirt; 21. Bottom Structure, 22. End frame, 211. Bottom side beam, 212. Bottom longitudinal beam, 213. Bottom diagonal brace, 214. Bottom side beam diagonal brace, 215. Longitudinal beam baffle, 216. Longitudinal beam stiffener, 221. Upper end Beam, 222. Lower end beam, 223. Left corner column, 224. Right corner column, 225. Corner piece, 226. End frame diagonal brace, 227. End ladder, 228. Guard plate; 31. Handrail; a2. Wave board body , a3. Stiffened rib plate, a4. Waveproof plate backing plate, a5. Unloading groove, a21. First arc section, a22. Straight section, a23. Second arc section, a24. Bending section; b1. Bottom surface I, b11. Bottom hole, b2. End surface I, b21. End hole, b3. Side surface I, b31. Side hole; c1. Triangular support component, c2. Full-length channel steel, c3. Full-length angle steel, c4.U Type bending piece, c5. Short angle steel I, c6. Short angle steel II, c7. Longitudinal walkway, c8. Transverse walkway, c9. End support piece I, c10. End support piece II, c11. L-shaped bending piece, c101 .Horizontal parts, c102. Oblique parts.

Detailed ways

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. All equivalent transformations based on the technical solution of this application fall within the protection scope of the present invention.

Example 1:

As shown in Figures 1 to 14, this embodiment provides a concentrated sulfuric acid tank container with a total weight of 70 tons, including a tank 1, a frame 2 and a walking platform structure 3;

The tank includes a cylinder 11 and an end head. On the top of the cylinder 11, there are a plurality of overflow boxes 12 arranged in sequence along the longitudinal direction of the cylinder 11. A plurality of reinforcing rings 13 are provided outside the cylinder 11 and the reinforcing rings 13 A support 14 is provided at the lower end, and a wave-proof plate 15 is provided inside the barrel 11. The head and the frame 2 are connected through a skirt 16. The wave-proof plate can effectively reduce the impact of the medium on the tank, and strengthen the ring and wave-proofing. The plates can jointly bear the external pressure;

The frame 2 includes a bottom structure 21 and end frames 22 at both ends. The end frame 22 is a square structure. In this embodiment, the end frame dimensions are: width 2438mm, height 2591mm, including horizontal upper end beams 221 and lower end beams 222, There are vertical left corner posts 223 and right corner posts 224 provided between the upper end beam 221 and the lower end beam 222 and four corner pieces 225 provided at the four corners of the end frame 22; the bottom structure 21 includes two bottom side beams 211, two sets of The bottom longitudinal beam 212, the bottom diagonal brace 213 and the bottom side beam diagonal brace 214. The two bottom side beams 211 are parallel to each other and connected between the two end frames 22. The two sets of bottom longitudinal beams 212 are located between the two bottom side beams 211. and are respectively connected to the middle positions of the lower parts of the two end frames 22. Each bottom longitudinal beam 212 is provided with a bottom diagonal brace 213 on both sides, and the bottom diagonal brace 213 connects the bottom longitudinal beam 212 and the corner piece 225 of the lower end of the end frame 22. , both ends of the bottom side beam diagonal brace 214 are respectively connected to the inner wall of the bottom side beam 211 and the support 14, and the bottom longitudinal beam 212 is connected to the bottom of the cylinder 11 above it;

The walking platform structure includes triangular support component c1, full-length channel steel c2, full-length angle steel c3, U-shaped bending piece c4, short angle steel Ic5, short angle steel IIc6, longitudinal walkway c7, transverse walkway c8, end support Ic9, end support Part IIc10 and L-shaped bending part c11; triangular support assembly c1 includes a horizontal piece c101 and an inclined piece c102. One end of the horizontal piece c101 and one end of the inclined piece c102 are connected to form the top corner, and the other end of the horizontal piece c101 and the inclined piece c102 The other ends of the overflow box 12 are fixed on the overflow box 12; the triangular support component c1 is fixed on the front and rear walls of the overflow box 12. Two sets of triangular support components c1 are symmetrically provided on both ends of the front wall of the overflow box 12. The overflow box 12 Two sets of triangular support components c1 are symmetrically provided at both ends of the rear wall; the full-length channel steel c2 and the full-length angle steel c3 are welded to the cross member c101 of the triangular support component c1, and the full-length channel steel c2 and full-length angle steel c3 are parallel to each other And they are all laid out longitudinally along the tank body. The full-length channel steel c2 is located in the middle of the horizontal member c101, and the full-length angle steel c3 is close to the top corner of the triangular support component c1; the U-shaped bending piece c4 is connected to the full-length channel steel c2 and the full-length angle steel. c3, and the tops of the full-length channel steel c2, U-shaped bending piece c4 and full-length angle steel c3 are flush; the short angle steel Ic5 is fixed on the side wall of the full-length channel steel c2 near the center of the tank, and the short angle steel The upper surface of Ic5 is flush with the top of the full-length channel steel c2; the longitudinal walkway c7 is installed on the U-shaped bending piece c4 and the upper surface of the full-length angle steel c3; the transverse walkway c8 is installed on the short angle steel Ic5, and at each corner of the transverse walkway c8 Let there be a short angle steel Ic5.

Through the above technical solutions, (1) Corner pieces: The strength and stiffness design of the corner pieces fully consider the typical mechanical vibration or impact load generated by the tank container during railway transportation and various working conditions during the hoisting process. Through limited After element simulation and corner piece strength test verification, the structure finally adopted a box structure, cast with C-grade steel, and was used on a 70-ton tank container. The tank container successfully passed more than ten type test verifications, so the structural design of the corner pieces complies with Require. (2) Tank and frame connection structure: Due to the large total weight of the tank container design, the inertial force is much greater than the load that ordinary standard containers need to bear. This tank container adopts two structural combinations of bottom diagonal braces and skirts to fully connect the tanks. The body and frame make the tank container have sufficient rigidity in the longitudinal and transverse directions to withstand various inertial loads and test loads. Among them, a longitudinal beam is added to the bottom of the cylinder, and the bottom diagonal brace connects the cylinder and the longitudinal beam. This structure can make full use of the longitudinal stiffness of the tank itself, which is very beneficial for the tank to carry longitudinal impact loads; the skirt connects the head and the end frame, so The diameter of the tank body is small, and the skirt adopts a cone structure. The skirt structure is a relatively mature structure in the tank box, which can effectively connect the tank body and the frame, and enhance the longitudinal stiffness and transverse stiffness of the tank box. (3) Frame structure: The frame structure includes the end frame, lower side beams and their diagonal braces, bottom diagonal braces and legs, etc. The corner columns of the end frame are made of high-strength weather-resistant steel Q450NQR1, which reduces the wall thickness and meets the strength requirements; the lower side The beam uses an additional diagonal brace structure to improve its natural frequency and anti-instability ability, and further the lower side beam uses J120X80X4; this frame structure can effectively reduce its own weight on the premise of satisfying strength, stiffness, and stability.

In the bottom structure:

The bottom longitudinal beam 212 is a U-shaped bending structure with an opening facing upward, including the bottom surface of the bottom longitudinal beam and the sides of the two bottom longitudinal beams; the two ends of the bottom longitudinal beam 212 are connected to the middle inner wall of the lower end beam 222 and the longitudinal beam baffle 215 respectively. The beam baffle 215 is perpendicular to the bottom surface of the bottom longitudinal beam and vertically connected to the sides of the bottom longitudinal beam on both sides;

The two ends of the bottom diagonal brace 213 are respectively connected to the corner pieces 225 on the side of the bottom longitudinal beam and the end of the lower end beam 222 of the end frame 22. At the junction of the bottom diagonal brace 213 and the bottom longitudinal beam 212, there is a Longitudinal beam stiffeners 216 are parallel to the longitudinal beam baffles 215 and both ends of the longitudinal beam stiffeners 216 are connected to the inner walls of the bottom longitudinal beam sides. There are two longitudinal beam stiffeners 216 and they are parallel to each other; in this embodiment, The bottom diagonal brace 213 can transmit the longitudinal force of the cylinder to the high-strength angle pieces, and the longitudinal beam stiffeners locally strengthen the bottom longitudinal beam, which can effectively reduce local stress concentration.

The upper end of the bottom longitudinal beam side is connected to the lower part of the cylinder 11, and the upper end of the longitudinal beam baffle 215 is connected to the lower part of the reinforcing ring 13. Specifically, they are all welded;

There are multiple groups of bottom side beam diagonal braces 214, and each group of bottom side beam diagonal braces 214 is symmetrically arranged on two bottom side beams 211.

End frame diagonal braces 226 are respectively provided inside the four corners of the end frame 22. A vertical end ladder 227 is connected between the upper end beam 221 and the lower end beam 222 of the end frame 22; guard plates 228 are provided at the four corners of the end frame 22. .

In wave protection board:

The wave-proof board includes multiple sets of wave-proof board assemblies located in the cylinder 11. The wave-proof board assembly includes a wave-proof board body a2, a wave-proof board backing plate a4 and a reinforced rib plate a3;

The anti-wave plate backing plate a4 has an arc-shaped structure, and the anti-wave plate backing plate a4 is tightly fixed on the inner wall of the cylinder 11;

The anti-wave plate body a2 has a corrugated plate structure. The edges of the anti-wave plate body a2 are arc edges and straight edges. The arc edges of the anti-wave plate body a2 are close to and fixed on the anti-water plate backing plate a4;

The stiffening plate a3 has a T-shaped structure, and the stiffening plate a3 is fixed at the connection between the straight edge end of the wave-proof board body a2 and the wave-proof board backing plate a3;

Two adjacent groups of wave-proof plate assemblies are respectively located on both sides of the vertical section passing through the central axis of the barrel 11, and the adjacent two groups of wave-proof plate assemblies are arranged sequentially along the axial direction of the barrel 11 so that the two groups of wave-proof plate assemblies Misplaced arrangement.

An unloading groove 5 is provided at the connection between the wave-proof board body 2 and the wave-proof board backing plate 4, and an unloading groove 5 is provided on the straight edge of the wave-proof board body 2 to improve the local stress of the wave-proof board body;

Bend the body of the wave-proof plate at a distance of 50 to 80 mm from the straight edge of the body of the wave-proof plate a2, and the bending crease is parallel to the straight edge of the body of the wave-proof plate a2. This bending can improve the stress condition of the wave-proof board body;

The wave-proof plate body a2 is an integrated structure, including a first arc section a21, a straight section a22, a second arc section a23 and a bent section a24; the first arc section a21 and the second arc section a23 are in opposite directions. , the bending direction of the bent section a24 is opposite to the direction of the second arc section a23, and the straight section a22, the crease of the bent section a24 and the straight edge of the wave-proof plate body a2 are all parallel. The integrated structure of the first arc section, straight section and second arc section of the wave-proof plate body is manufactured by a rounding machine, which reduces the manufacturing difficulty;

The arc radius of the first arc segment a21 and the second arc segment a23 is 400-600mm, and the straight side length of the wave-proof plate body a2 is 90-120mm;

The angle between the straight edges of the wave-proof board body a2 of two adjacent groups of wave-proof board assemblies is 10° to 15° to form a V-shaped gap between the two adjacent groups of wave-proof board assemblies; thus one person can be accommodated The pass not only facilitates staff to enter each compartment of the tank for cleaning, maintenance and inspection, but also makes the liquid in the tank flow smoothly;

The two ends of the anti-wave plate pad a4 are round ends, and the diameter of the circular end is larger than the width of the anti-corrosion plate a4; in order to strengthen the anti-wave plate pad, it effectively improves the connection between the two ends of the anti-wave plate pad. The stress on the connection parts of the cylinder.

Specifically, in this embodiment, there are between the cylinder and the wave-proof board pad, between the wave-proof board pad and the wave-proof board body, between the wave-proof board body and the reinforcing rib plate, between the wave-proof board pad and the wave-proof board pad. The stiffeners are all welded.

In the corner pieces:

The corner piece is a rectangular box-shaped structure, including two bottom surfaces and four side surfaces. Among them, one bottom surface and two side surfaces at the same vertex are respectively the bottom surface Ib1 provided with the bottom hole b11, the end surface Ib2 provided with the end hole b21, and the end surface Ib2 provided with the end hole b21. The side surface Ib3 with the side hole b31, the other bottom surface and the other two sides at the common vertex are the bottom surface II, the end surface II and the side surface II respectively; the end surface Ib2 is opposite to the end surface II, and the side surface Ib3 is opposite to the side surface II;

The bottom hole b11, the end hole b21 and the side hole b31 are all waist-shaped holes. The long axis of the bottom hole b11 is perpendicular to the end surface Ib2, and the long axis of the side hole b31 and the end hole b21 are perpendicular to the bottom surface Ib1; the long axis of the bottom hole b11 Parallel to the axial direction of the tank; the thickness of bottom surface I1 is 28.5mm, the thickness of bottom surface II is 20mm, and the thickness of end surface Ib2 and end surface II is both 20.5mm.

The corner pieces are divided into top corner pieces and bottom corner pieces. The top corner pieces are divided into left top corner pieces and right top corner pieces, and the left top corner pieces and right top corner pieces are symmetrical. The bottom corner pieces are divided into left bottom corner pieces and The right bottom corner piece and the left bottom corner piece and the right bottom corner piece are left and right symmetrical.

The bottom surface II of the left top corner piece is welded to the top of the left corner post, the side II of the left top corner piece is welded to one end of the upper end beam; the bottom surface II of the right top corner piece is welded to the top of the right corner post, and the side II of the right top corner piece is welded to the upper end beam. The other end is welded;

The bottom surface II of the left bottom corner piece is welded to the bottom end of the left corner column, the side surface II of the left bottom corner piece is welded to one end of the lower end beam, the end face II of the left bottom corner piece is welded to the end of the bottom diagonal brace 213; the bottom surface of the right bottom corner piece is welded II is welded to the bottom end of the right corner column, the side II of the right bottom corner piece is welded to the other end of the lower end beam, and the end face II of the right bottom corner piece is welded to the end of the bottom diagonal brace 213.

The outer dimensions of the top corner piece are 178x162x118mm; the outer dimensions of the bottom corner piece are 188x162x128mm.

The long axis length of the bottom hole b11 is 124mm and the short axis length is 63.5mm; the long axis length of the end hole b21 and the side hole b31 is 79.5mm and the short axis length is 51mm.

The bottom hole b11 is provided with orifice chamfering.

In this embodiment, the positions of the bottom hole, end hole and side hole of the right bottom corner piece are: the distance between the center of the bottom hole of the right bottom corner piece and the outer surface of the end face I is 101.5mm, and the distance from the outer surface of the side face I is 101.5mm. 89mm; the distance between the center of the end hole of the right bottom corner piece and the side surface I is 89mm, and the distance from the bottom surface I is 68.25mm; the distance between the center of the side hole of the right bottom corner piece and the bottom surface I is 68.25mm, and the distance from the end surface I is 68.25mm. The distance is 101.5mm.

The design of the corner parts of this embodiment fully considers the load of the tank container on roads, railways, waterways and their combined transportation, as well as stacking, lifting and other working conditions in the yard.

Finite element software was used to simulate the various working conditions of corner fittings applied to tanks with a total weight of up to 70 tons. The stress distribution under each working condition was compared with the corresponding working conditions of universal corner fittings on tank containers with a total weight of 36 tons. Analogy analysis.

After analysis, it was determined that the shape of the corner parts should follow the box structure. The bottom corner parts have an outer dimension of 188x162x128 (mm) and the top corner parts have an outer dimension of 178x162x118 (mm). They are cast from C-grade steel with mature manufacturing experience in railway products. The shape, size and positioning of the end holes, bottom/top holes, and side holes of the corner pieces comply with ISO1161 requirements to ensure that the corner pieces can use universal bolting devices, spreaders, etc. during road, rail, and water transport.

After the corner pieces are made, a separate strength test is conducted, including four tests: stacking, ceiling, bottom, and longitudinal bolting. The test load is designed according to the design total weight of the tank container of 70 tons. The longitudinal bolting test fully takes into account the actual test process. Both ends of the bottom hole of the corner piece may bear impact loads, so the test was conducted in both longitudinal directions. During the test, the corner piece did not undergo obvious plastic deformation or other damage that would affect its use under the given test load.

The corner pieces are used on tank containers with a total design weight of 70 tons. The tank container successfully passed various type tests stipulated in ISO1496-3, including the dynamic longitudinal impact test. During the test, the corner pieces did not undergo any plastic deformation or damage that would affect use.

Verification through the corner piece strength test and tank container type test shows that the corner piece design meets the strength requirements for corners for containers with a total weight of up to 70 tons.

In the catwalk structure:

The end of the full-length channel steel c2 is connected by bolts to the end support Ic9 welded to the lower surface of the upper end beam 221;

The full-length angle steel c3 is welded to the L-shaped bending piece c11 welded to the top corner of the triangular support component c1 to form a square cross-section;

The L-shaped bending piece c11 is supported by the end support piece IIc10 welded to the inner end face of the corner column of the tank;

The end of the full-length angle steel c3, the L-shaped bending piece c11 and the end support piece IIc10 are connected by bolts;

Welding between triangular support component c1 and overflow box 12;

The longitudinal walkway c7 is connected to the U-shaped bending piece c4 and the long angle steel c3 through bolts; the transverse walkway c8 and the short angle steel Ic5 are connected through bolts;

Welding between short angle steel Ic5 and full-length channel steel c2;

The short angle steel IIc6 is welded and fixed on the side wall of the full-length channel steel c2 close to the full-length angle steel c3. The upper surface of the short angle steel IIc6 is flush with the top of the full-length channel steel c2; the longitudinal walkway c7 is close to the lower surface of the middle part of one end of the full-length channel steel c2. It is supported by short angle steel IIc6, and the two are connected by bolts.

Both ends of the U-shaped bending part are fixed to the side walls of the full-length channel steel and full-length angle steel by welding.

The contact point between the L-shaped bending piece and the top end of the triangular support component is fixed by welding, and the top of the L-shaped bending piece is located on the lower side of the full-length angle steel. The outer facade is flush with the outer end of the full-length angle steel to form a square cross-section, and the top end is in contact with each other. fixed by welding.

At the above-mentioned bolt connection, after the bolts, washers and nuts are tightened, the nuts and bolts are spot welded and fixed.

The triangular support component of this embodiment is made of standard hot-rolled steel, such as angle steel or channel steel, and has the advantages of uniform size and high structural stability. It has been verified through experiments that after the triangular support component is welded to the side wall of the overflow box, The assembled weldments (full-length angle steel, U-shaped bending pieces and full-length channel steel assembly) welded on the upper end face and the structure after installation of the walkway can meet the requirements of national standards and bear a load of 300kg on an area of 300mmX600mm. .

There is a handrail 31 on the outer wall of the full-length angle steel c3, and the handrail 31 is foldable;

The handrail 31 includes three vertical handrails and a horizontal handrail. The vertical handrail is an L-shaped steel pipe bent piece and includes a vertical part and a horizontal part. The handrail crossbar is connected to the top of the vertical parts of the three vertical handrails. The horizontal part of the vertical rod is vertically installed in the support plate hole on the full-length angle steel c3, so that the vertical part of the handrail vertical rod can be folded from vertical to horizontal, and the handrail vertical rod and the handrail cross bar are hinged. Specifically, there is a hinge buckle on the side wall of the full-length angle steel. When the vertical part of the handrail vertical bar is rotated to the vertical position, the hinge buckle is rotated and opened to the level, and the handrail vertical bar can just be stuck on the hinge. into the limit groove on the buckle, thereby positioning the handrail vertical rod vertically.

The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner as long as there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, any combination of various embodiments of the present invention can also be carried out. As long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (9)

A concentrated sulfuric acid tank container with a total weight of 70 tons, which is characterized by including a tank body (1), a frame (2) and a walking platform structure (3); The tank (1) includes a cylinder (11) and an end head. A plurality of overflow boxes (12) arranged in sequence along the longitudinal direction of the cylinder (11) are provided on the top of the cylinder (11). (11) There are multiple reinforcement rings (13) on the outside, and a support (14) is provided on the lower end of the reinforcement ring (13). A wave-proof plate (15) is provided inside the barrel (11), and the head and frame (2 ) are connected through the skirt (16); The frame (2) includes a bottom structure (21) and end frames (22) at both ends. The end frame (22) is a square structure and includes a horizontal upper end beam (221) and a lower end beam (222). The vertical left corner column (223) and the right corner column (224) between the upper end beam (221) and the lower end beam (222) and the four corner pieces (225) located at the four corners of the end frame (22); the bottom structure ( 21) includes two bottom side beams (211), two sets of bottom longitudinal beams (212), bottom diagonal braces (213) and bottom side beam diagonal braces (214). The two bottom side beams (211) are parallel to each other and connected to each other. Between the two end frames (22), two sets of bottom longitudinal beams (212) are located between the two bottom side beams (211) and are respectively connected to the lower middle positions of the two end frames (22). Each bottom longitudinal beam (212) 212) There is a bottom diagonal brace (213) on both sides, and the bottom diagonal brace (213) connects the bottom longitudinal beam (212) and the corner piece (225) of the lower end of the end frame (22). The bottom side beam diagonal brace (214) ) The two ends are respectively connected to the inner wall of the bottom side beam (211) and the support (14), and the bottom longitudinal beam (212) is connected to the bottom of the cylinder (11) above it; The walking platform structure includes triangular support components (c1), full-length channel steel (c2), full-length angle steel (c3), U-shaped bending parts (c4), short angle steel I (c5), short angle steel II (c6) , longitudinal walkway (c7), transverse walkway (c8), end support piece I (c9), end support piece II (c10) and L-shaped bending piece (c11); triangular support assembly (c1) includes horizontal piece (c101) and the inclined piece (c102), one end of the horizontal piece (c101) and one end of the inclined piece (c102) are connected to form the top corner, and the other end of the horizontal piece (c101) and the other end of the inclined piece (c102) are both fixed on the overflow box (12); the triangular support assembly (c1) is fixed on the front and rear walls of the overflow box (12). Two sets of triangular support assemblies (c1) are symmetrically provided at both ends of the front wall of the overflow box (12). Two sets of triangular support assemblies (c1) are symmetrically provided at both ends of the rear wall of the flow box (12); the full-length channel steel (c2) and the full-length angle steel (c3) are welded to the horizontal member (c101) of the triangular support assembly (c1) On the top, the full-length channel steel (c2) and the full-length angle steel (c3) are parallel to each other and are arranged longitudinally along the tank body (1). The full-length channel steel (c2) is located in the middle of the horizontal member (c101), and the full-length angle steel (c3) Close to the top corner of the triangular support component (c1); the U-shaped bending piece (c4) is connected between the full-length channel steel (c2) and the full-length angle steel (c3), and the full-length channel steel (c2), U-shaped The tops of the bent part (c4) and the full-length angle steel (c3) are flush; the short angle steel I (c5) is fixed on the side wall of the full-length channel steel (c2) near the center of the tank (1). The short angle steel I (c5) The upper surface is flush with the top of the full-length channel steel (c2); the longitudinal walkway (c7) is installed on the upper surface of the U-shaped bending piece (c4) and the full-length angle steel (c3); the transverse walkway (c8) is installed on the short On the angle steel I (c5), a short angle steel I (c5) is provided at each of the four corners of the transverse walkway (c8). The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 1, characterized in that the bottom longitudinal beam (212) is a U-shaped bending structure with an upward opening, including the bottom surface of the bottom longitudinal beam and two bottoms. The side of the longitudinal beam; the two ends of the bottom longitudinal beam (212) are respectively connected to the middle inner wall of the lower end beam (222) and the longitudinal beam baffle (215). The longitudinal beam baffle (215) is perpendicular to the bottom surface of the bottom longitudinal beam and is connected to the bottom of both sides. The sides of the longitudinal beams are connected vertically; Both ends of the bottom diagonal brace (213) are respectively connected to the corner pieces (225) on the sides of the bottom longitudinal beam and the end of the lower end beam (222) of the end frame (22). 212) is connected with a longitudinal beam stiffener (216) located in the bottom longitudinal beam (212). The longitudinal beam stiffener (216) is parallel to the longitudinal beam baffle (215) and both ends of the longitudinal beam stiffener (216) Connecting the inner wall of the side of the bottom longitudinal beam, there are two longitudinal beam ribs (216) parallel to each other; The upper end of the side of the bottom longitudinal beam is connected to the lower part of the barrel (11), and the upper end of the longitudinal beam baffle (215) is connected to the lower part of the reinforcing ring (13); There are multiple groups of bottom side beam diagonal braces (214), and each group of bottom side beam diagonal braces (214) is symmetrically arranged on two bottom side beams (211). The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 2, characterized in that end frame diagonal braces (226) are respectively provided inside the four corners of the end frame (22). A vertical end ladder (227) is connected between the upper end beam (221) and the lower end beam (222); guard plates (228) are provided at the four corners of the end frame (22). The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 2, wherein the anti-wave plate (15) includes multiple groups of anti-wave plate assemblies arranged in the cylinder (11). The components include the seaproof board body (a2), the waveproof board backing plate (a4) and the reinforced rib plate (a3); The anti-wave plate backing plate (a4) has an arc-shaped structure, and the anti-wave plate backing plate (a4) is tightly fixed on the inner wall of the cylinder (11); The corrugated board body (a2) has a corrugated plate structure. The edges of the corrugated board body (a2) are arc edges and straight edges. The arc edges of the corrugated board body (a2) are close to and fixed on the corrugated board backing plate (a4). )superior; The reinforcing rib plate (a3) has a T-shaped structure, and the reinforcing rib plate (a3) is fixed at the connection between the straight edge end of the wave-proof board body (a2) and the wave-proof board pad (a3); Two adjacent groups of wave-proof plate assemblies are respectively located on both sides of the vertical section passing through the central axis of the barrel (11), and the adjacent two groups of wave-proof plate assemblies are arranged sequentially along the axial direction of the barrel (11) so that the two groups The anti-wave plate components are misaligned. The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 4, characterized in that an unloading groove (a5) is provided at the connection between the wave-proof plate body (a2) and the wave-proof plate backing plate (a4) , there is an unloading groove (a5) on the straight edge of the wave plate body (a2); Bend the body of the wave-proof board at a distance of 50 to 80 mm from the straight edge of the body of the wave-proof board (a2), and the bending crease is parallel to the straight edge of the body of the wave-proof board (a2); The wave-proof plate body (a2) is an integrated structure, including a first arc section (a21), a straight section (a22), a second arc section (a23) and a bent section (a24); the first arc section The direction of the segment (a21) and the second arc segment (a23) are opposite, the bending direction of the bent segment (a24) is opposite to the direction of the second arc segment (a23), the straight segment (a22), the bent segment ( The creases of a24) and the straight edges of the wave-proof board body (a2) are both parallel; The arc radius of the first arc segment (a21) and the second arc segment (a23) is 400-600mm, and the straight side length of the wave-proof plate body (a2) is 90-120mm; The angle between the straight edges of the waveproof plate body (a2) of two adjacent groups of waveproof plate assemblies is 10° to 15° to form a V-shaped gap between the two adjacent groups of waveproof plate assemblies; The two ends of the anti-wave plate backing plate (a4) are circular ends, and the diameter of the circular end is larger than the width of the anti-wave plate backing plate (a4). The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 2, characterized in that the corner piece (225) is a rectangular parallelepiped box structure, including two bottom surfaces and four sides, wherein one of the common vertices The bottom surface and two side surfaces are respectively the bottom surface I(b1) with the bottom hole (b11), the end surface I(b2) with the end hole (b21), and the side surface I(b3) with the side hole (b31). Total The other bottom surface and the other two sides of the vertex are bottom surface II, end surface II and side surface II respectively; end surface I (b2) is opposite to end surface II, and side surface I (b3) is opposite to side surface II; The bottom hole (b11), end hole (b21) and side hole (b31) are all waist-shaped holes. The long axis of the bottom hole (b11) is perpendicular to the end face I (b2). The side hole (b31) and the end hole (b31) are all waist-shaped holes. The long axis of b21) is perpendicular to the bottom surface I (b1); the long axis of the bottom hole (b11) is parallel to the axial direction of the tank (1); the thickness of the bottom surface I (1) is 28.5mm, and the thickness of the bottom surface II is 20mm, and the thickness of end face I (b2) and end face II is both 20.5mm. The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 6, characterized in that the corner piece (225) is divided into a top corner piece and a bottom corner piece, and the top corner piece is divided into a left top corner piece. and the right top corner piece, and the left top corner piece and the right top corner piece are left and right symmetrical, and the bottom corner piece is divided into a left bottom corner piece and a right bottom corner piece, and the left bottom corner piece and the right bottom corner piece are left and right symmetrical; The bottom surface II of the left top corner piece is welded to the top of the left corner post (223), the side surface II of the left top corner piece is welded to one end of the upper end beam (221); the bottom surface II of the right top corner piece is welded to the right corner post (224) The top is welded, and the side II of the right top corner piece is welded to the other end of the upper end beam (221); The bottom surface II of the left bottom corner piece is welded to the bottom end of the left corner post (223), the side surface II of the left bottom corner piece is welded to one end of the lower end beam (222), and the end face II of the left bottom corner piece is welded to the bottom diagonal brace (213) End welding; the bottom surface II of the right bottom corner piece is welded to the bottom end of the right corner post (224), the side surface II of the right bottom corner piece is welded to the other end of the lower end beam (222), the end surface II of the right bottom corner piece is welded to the bottom The end of diagonal brace (213) is welded; The outer dimensions of the top corner piece are 178x162x118mm; the outer dimensions of the bottom corner piece are 188x162x128mm; The long axis length of the bottom hole (b11) is 124mm, and the short axis length is 63.5mm; the long axis length of the end hole (b21) and the side hole (b31) is 79.5mm, and the short axis length is 51mm; The bottom hole (b11) is provided with an orifice chamfer. The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 1, characterized in that the end of the full-length channel steel (c2) and the end support I (221) welded to the lower surface of the upper end beam (221) c9) Connected by bolts; The full-length angle steel (c3) is welded to the L-shaped bending piece (c11) welded to the top corner of the triangular support component (c1) to form a square cross-section; The L-shaped bending piece (c11) is supported by the end support piece II (c10) welded to the inner end surface of the corner column; The end of the full-length angle steel (c3), the L-shaped bending piece (c11) and the end support piece II (c10) are connected by bolts; Welding between the triangular support component (c1) and the overflow box (12); The longitudinal walkway (c7) is connected to the U-shaped bending piece (c4) and the long angle steel (c3) by bolts; the transverse walkway (c8) and the short angle steel I (c5) are connected by bolts; Welding between the short angle steel I (c5) and the full-length channel steel (c2); The short angle steel II (c6) is welded and fixed on the side wall of the full-length channel steel (c2) close to the full-length angle steel (c3), and the upper surface of the short angle steel II (c6) is flush with the top of the full-length channel steel (c2) ; The lower surface of the middle part of one end of the longitudinal walkway (c7) close to the full-length channel steel (c2) is supported by the short angle steel II (c6), and the two are connected by bolts. The concentrated sulfuric acid tank container with a total weight of 70 tons according to claim 8, characterized in that a handrail (31) is provided on the outer wall of the full-length angle steel (c3), and the handrail (31) is foldable ; The handrail (31) includes three vertical handrails and a horizontal handrail. The vertical handrail is an L-shaped steel pipe bent piece and includes a vertical part and a horizontal part. The horizontal handrail is connected to the vertical part of the three vertical handrails. At the top of the part, the horizontal part of the handrail vertical bar is installed vertically in the support plate hole on the full-length angle steel (c3), so that the vertical part of the handrail vertical bar can be rotated from vertical to horizontal to achieve folding. The handrail vertical bar and the handrail Hinged between crossbars.

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