Heavy-duty dangerous goods tank container for transporting low-risk low-density electrolyte

Abstract

A heavy-duty dangerous goods tank container for transporting a low-risk low-density electrolyte. The tank container is a heavy-duty dangerous goods tank container having a volume of 30m3 and a guideline for tank containers of T4, and can carry and transport dangerous goods and non-dangerous goods having a guideline for tank containers not higher than T4. The tank container comprises a tank body (1), a frame (2), a heating device (3), a heat preservation device (4), an access ladder (5) and a walkway assembly (6). The tank body is a structure having a noncircular section, and the bottom of a rear seal head of the tank body is provided with a liquid discharging hole, where a discharging valve (11) is provided. The tank body uses a top-loading and bottom-unloading mode. The heating device is arranged on the outer wall of the lower portion of the tank body, and the heat preservation device is arranged outside the tank body and the heating device . The tank container is applicable to domestic and overseas highways, railways, waterways and intermodal transportation thereof, can quickly respond to railway transportation demands for dangerous liquid goods possibly occurring at any time in the future, can also improve the transportation economy of low-density dangerous liquid goods and non-dangerous liquid goods, and improves the transportation safety of multimodal transportation.

Description

Heavy-duty dangerous goods tank containers for transporting low-risk, low-density electrolytes Technical Field

[0001] The invention relates to a large-load dangerous goods tank container for transporting low-risk and low-density electrolytes. Background Art

[0002] Currently, only a very small number of dangerous liquid goods can be transported by rail. With the implementation of the "road to rail" policy and the adjustment of the overall transportation structure, as well as the increasing market demand for the use of tank containers for rail transportation of dangerous goods, domestic logistics companies are actively promoting the relevant preparations for the rail transportation of several types of dangerous liquid goods and actively promoting the use of multimodal transport equipment for dangerous liquid goods by rail. As a member of the chemical transportation and storage equipment manufacturing industry, we should actively promote the multimodal transportation of chemicals and improve the economic efficiency of transportation; carry out the research and development of tank container products with light weight, large load capacity, and a wide range of loading media. It is very necessary to prepare technology and products for the explosive market demand for the transportation of liquid dangerous goods after the gradual liberalization of multimodal transport equipment for dangerous liquid goods by rail.

[0003] Within the framework of Series 1 standard tank container 1CC, the volume of circular cross-section tank container generally does not exceed 26m 3 , and the early 26m 3 The circular cross-section tank containers are mainly T11 international transport standard containers. Some manufacturers design them as non-hazardous cargo tank containers, which have the following two main disadvantages: on the one hand, the transportation economy is not high. Due to the small volume, it is not economical to transport low-density media such as ethylene glycol and electrolytes; on the other hand, the safety considerations for domestic railway open wagon transportation of tank containers are not comprehensive, and the tank container frame design does not fully consider the domestic railway open wagon transportation conditions. Considering the economic transportation of non-hazardous cargo and low-density media such as ethylene glycol, the market has developed a 29m3 tank container with a volume of 29m3. 3The 1CC non-circular cross-section tank container is not equipped with a heating and insulation structure. This product was developed for ethylene glycol as a medium, but ethylene glycol is a non-dangerous cargo. This type of product is not designed according to the tank container guidelines in the IMDG Code. It is not suitable for the transportation of low-density hazardous liquid cargoes, nor is it suitable for the transportation of low-density media that require heating and insulation. The tank bodies in the existing technology also have the following shortcomings: First, the fatigue problem of the local structure of the tank container when transporting the tank container on railway open wagons is not fully considered. In particular, the bottom grooves of the end frame of the lower unloading tank container and the holes in the transition section of the head lead to structural discontinuity. The large number of local reinforcements leads to sudden changes in stiffness. At the sudden changes in stiffness, there are both severe stress concentration and dense fillet welds. The fillet weld design is unreasonable and no special manufacturing requirements are proposed, resulting in the inevitable existence of welding defects at the welded joints. These defects have high stress concentration and welding residual stress, and there is a high risk of fatigue cracks. Second, the applicable transport medium is relatively small. On the one hand, there is no heating and insulation structure, so it is not suitable for the transportation of low-density media that require heating and insulation; on the other hand, the product is not designed according to the tank container guidelines in the IMDG Code, so it is not suitable for the transportation of low-density hazardous liquid goods. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a large-load dangerous goods tank container for transporting low-risk and low-density electrolytes, and at the same time solve the following problems existing in the prior art: the volume of the 1CC series standard container has not reached the limit; the non-circular cross-section tank container is suitable for transporting fewer media and cannot meet the transportation needs of low-risk and low-density electrolytes that are gradually emerging in the market; the strength and fatigue problems during open truck transportation are not fully considered in the design of the tank container; the use of traditional evaluation methods to evaluate the strength and rigidity of square and circular cross-section tank bodies under pressure test conditions results in a large tank container weight.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A large-load dangerous goods tank container for transporting low-risk, low-density electrolytes. The tank container has a volume of 30m 3 A heavy-duty dangerous goods tank container with a tank guideline of T4, capable of transporting dangerous goods and non-dangerous goods with a tank guideline not exceeding T4; the tank container includes a tank body, frame, heating device, insulation device, end ladder, and walkway assembly;

[0007] The tank body has a non-circular cross-section structure, and a manhole, a safety valve, an air ball valve and a spare port are provided on the top of the tank body; a liquid unloading hole is provided at the bottom of the rear head of the tank body, and a unloading valve is installed thereat; the tank body adopts a top-loading and bottom-unloading method; an annular reinforcement ring with an I-shaped cross-section is provided on the inner wall of the tank body, and a longitudinal reinforcement member with a trapezoidal cross-section is provided on the outer wall of the tank body; the tank body is arranged in a frame, and the two ends of the tank body are connected to the frame with a straight skirt seat; the end ladder is arranged on the rear end frame of the frame, and the walkway assembly is arranged on the top of the frame; the heating device is arranged on the lower outer wall of the tank body, and an insulation device is arranged outside the tank body and the heating device.

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

[0009] Specifically, the frame includes a front end frame, a rear end frame, and two upper beams and two lower beams connecting the two; the front end frame and the rear end frame are both square structures surrounded by upper end beams, corner columns, lower end beams and corner columns in sequence, and diagonal braces are provided at the four corners of the front end frame and the rear end frame; the corner columns are made of high-strength weathering steel, the lower side beams are made of rectangular tubes with good resistance to vertical deflection, and the upper end beam and upper side beams are made of thin-walled steel.

[0010] Specifically, a U-shaped groove is provided on the upper surface of the middle part of the lower end beam of the rear end frame to facilitate the installation of the discharge valve and reserve sufficient operating space for it; a full-length patch is provided on the bottom surface of the lower end beam of the rear end frame, and a U-shaped bent part is welded on the inner surface of the U-shaped groove. The welds between the U-shaped bent part and the U-shaped groove of the lower end beam use beveled fillet welds in the front and rear directions and the welds are polished on the rear side so that the welds do not exceed the inner surface of the lower end beam. Beveled butt welding and fillet welds are used at both ends and the welds are polished until they are flush with the upper surface of the lower end beam; the U-shaped bent part has bending resistance, and the welds when connected to the lower end beam are polished accordingly considering the weld characteristics and the influence of stress concentration on the fatigue strength of this location.

[0011] Specifically, the heating device includes multiple longitudinal heating tubes and annular heating tubes; the longitudinal heating tubes are arranged on the lower outer wall of the tank body along the longitudinal direction, and the multiple longitudinal heating tubes are evenly distributed along the annular direction; the annular heating tubes are arranged on the lower outer wall of the tank body along the ring shape, and the annular heating tubes are arranged at both ends of the longitudinal heating tubes and are connected to the longitudinal heating tubes; the annular heating tubes are respectively connected to the air intake pipe and the exhaust pipe, and the air intake pipe and the exhaust pipe are arranged on both sides below the rear end frame, and a drain valve is arranged at the lowest point of the exhaust pipe.

[0012] Specifically, the lower heating area of ​​the tank body corresponding to the heating device is sprayed with high-temperature resistant anti-corrosion primer.

[0013] Specifically, the insulation device includes a rock wool board, a polyurethane circumferential support, and an outer covering board; the rock wool board is laid outside the tank body and the heating device, the polyurethane circumferential support is arranged outside the tank body along the circumferential direction, and the outer covering board is covered on the outside of the rock wool board and the polyurethane circumferential support; the rock wool board is laid tightly and fixed with a strapping tape; the outer covering board is made of fiberglass, the overlap of the outer covering board is bonded with butyl caulking glue, and the edge of the outer covering board is sealed and filled with silicone weather-resistant glue; reinforced aluminum foil is laid in the middle of both sides of the cylinder of the tank body and the center of the head where the rock wool board cannot be laid, and the edges and joints of the reinforced aluminum foil are bonded and fixed with aluminum foil tape.

[0014] Specifically, the unloading valve includes a root emergency shut-off valve, a clamping butterfly valve, an end BSP joint and a plug cover. The root emergency shut-off valve is equipped with a manual opening handle, a remote mechanical operating system and a fusible alloy plug for emergency shut-off in response to sudden fire situations. A gas-liquid linkage locking device is provided between the unloading valve and the top air ball valve to ensure that the air ball valve is in an open state before the unloading valve is opened, so as to avoid the risk of pressure buildup and instability in the tank body. A protective box is provided at the unloading valve.

[0015] Specifically, the bottom of the straight skirt seat connected between the rear end of the tank body and the rear end frame is disconnected to provide installation space for the discharge valve, and a discharge valve protection box is set at the disconnection point. The disconnected edge of the straight skirt seat is pressed with reinforcing pads and reinforcing parts to prevent the risk of tearing at the disconnection point between the straight skirt seat and the head of the tank body.

[0016] Specifically, the end ladder is arranged on the right side of the rear end frame. The end ladder includes two ladder columns and anti-slip footrests. The ladder columns and anti-slip footrests are made of thin-walled stainless steel square tubes. The end ladder is connected to the rear end frame with bolts for easy disassembly and replacement; the walkway assembly includes a walkway and a walkway support. The walkway and the walkway support are connected by bolts. The walkway width is 475mm and the material is aluminum alloy. The walkway support is fixed to the upper side beam through the root support. The walkway support and the root support are connected with bolts, and the root support is welded to the upper side beam.

[0017] Specifically, the manhole and safety valve are arranged near the center of the top of the tank body, and a protection box I is provided around the manhole and the safety valve; the air ball valve and the spare port are arranged near the rear of the top of the tank body. When transporting dangerous liquid goods, a butterfly valve is installed on the spare port for feeding, and a protection box II is provided around the air ball valve and the spare port to protect the valve body.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] The present invention has a volume of 30m 3 Heavy-duty dangerous goods tank containers with a tank guideline of T4 can transport dangerous goods and non-dangerous goods with a tank guideline no larger than T4, compatible with the materials of the container, and without special regulations. They are suitable for domestic and international road, rail, water and combined transport.

[0020] The present invention realizes the maximum volume within a given frame. The tank body adopts a non-circular cross-section structure, specifically a square-round cross-section. The most obvious feature of the square-round cross-section tank body is that it can make full use of the cross-sectional dimensions of the frame to maximize the volume. The longitudinal dimension limit of the frame is taken into consideration during the design. The front head is located in the front frame, where the insulation shell can be installed without interfering with the lower diagonal brace of the end frame. The tank body is basically in the limit position. The rear frame reserves space for the installation and operation of the bottom unloading combination valve. The length of the cylinder is maximized and the volume is 30m 3 .

[0021] The development of this high-load hazardous cargo tank container is crucial for actively responding to the country's multimodal transport policy and market demand for the transportation of low-density, low-hazard liquid cargo. It can quickly respond to potential future demand for hazardous liquid rail transport, promote the economic efficiency of transporting low-density hazardous liquid cargo and non-hazardous liquid cargo, and enhance the safety of multimodal transport both domestically and internationally. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the overall structure of the present invention;

[0023] FIG2 is a schematic diagram of the top structure of the present invention;

[0024] FIG3 is a schematic cross-sectional view of the tank body of the present invention;

[0025] FIG4 is a partial schematic diagram of the rear end of the tank body according to the present invention;

[0026] FIG5 is a schematic diagram of the framework of the present invention;

[0027] FIG6 is a schematic diagram of the back-end block diagram of the present invention;

[0028] FIG7 is a schematic diagram of partial groove reinforcement of the lower end beam of the rear end frame of the present invention;

[0029] FIG8 is a schematic diagram of the partial groove reinforcement welding of the lower end beam of the rear end frame of the present invention.

[0030] The meanings of the various numbers in the figure are: 1. Tank body, 2. Frame, 3. Heating device, 4. Insulation device, 5. End ladder, 6. Walkway assembly, 7. Manhole, 8. Safety valve, 9. Air ball valve, 10. Spare port, 11. Discharge valve, 12. Annular reinforcement ring, 13. Longitudinal reinforcement member, 14. Straight skirt, 15. Reinforcement pad, 16. Reinforcement member, 17. Protection box I, 18. Protection box II, 19. Discharge valve protection box; 111. Root emergency shut-off valve, 112. Clamp-type butterfly valve, 113. End BSP connector and plug cover; 21. Front frame, 22. Rear frame, 23. Upper side beam, 24. Lower side beam; 221. Full-length filler plate, 222. U-shaped bending part; 31. Longitudinal heating pipe, 32. Annular heating pipe. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1:

[0033] As shown in Figures 1 to 8, this embodiment provides a large-load dangerous goods tank container for transporting low-risk and low-density electrolytes. The tank container has a capacity of 30m 3 A heavy-duty dangerous goods tank container with a tank guideline of T4 can carry both dangerous goods and non-dangerous goods with a tank guideline of no greater than T4, compatible with the material of the tank container, and without special requirements. The tank container comprises a tank body 1, a frame 2, a heating device 3, an insulation device 4, an end ladder 5, and a walkway assembly 6.

[0034] Tank 1 has a non-circular cross-section structure and a volume of 30m3, which is the upper limit of the volume of a 1CC series standard container. 3 ; A manhole 7, a safety valve 8, an air ball valve 9 and a spare port 10 are provided on the top of the tank body 1; a liquid unloading hole is provided at the bottom of the rear head of the tank body 1, where a 45° combined unloading valve 11 is installed; the tank body 1 adopts a top-loading and bottom-unloading method; an annular reinforcement ring 12 with an I-section is provided on the inner wall of the tank body 1, and a longitudinal reinforcement member 13 with a trapezoidal section is provided on the outer wall of the tank body 1; the tank body 1 is arranged in the frame 2, and a straight skirt seat 14 is used to connect the two ends of the tank body 1 to the frame 2; an end ladder 5 is arranged on the rear end frame 22 of the frame 2, and a walkway assembly 6 is arranged on the top of the frame 2, which is convenient for users to perform relevant operations and box top related maintenance at the top overflow box; the heating device 3 is arranged on the lower outer wall of the tank body 1, and an insulation device 4 is arranged outside the tank body 1 and the heating device 3.

[0035] The frame dimensions are 6058x2438x2591mm. The frame 2 includes a front end frame 21, a rear end frame 22, and two upper side beams 23 and two lower side beams 24 connecting the two. The front end frame 21 and the rear end frame 22 are both square structures formed by upper end beams, corner columns, lower end beams and corner columns in sequence. Diagonal braces are provided at the four corners of the front end frame 21 and the rear end frame 22. The corner columns are made of high-strength weathering steel, and the lower side beams 24 are made of rectangular tubes with good resistance to vertical deflection. Based on various working conditions and failure investigations in actual use, the upper end beams and upper side beams 23 are made of thin-walled steel.

[0036] A U-shaped groove is provided on the upper surface of the middle part of the lower end beam of the rear end frame 22 to facilitate the installation of the discharge valve 11 and reserve sufficient operating space for it; the grooved part is reinforced in two ways: the first is to set a full-length patch 221 on the bottom surface of the lower end beam of the rear end frame 22 to ensure the integrity of the lower end beam in the longitudinal direction, and at the same time prevent the bottom plane of the lightweight lower end beam from being locally worn in the load transfer area working condition and the open car working condition; the second is to weld a thicker U-shaped bent part 222 on the inner surface of the U-shaped groove, taking into account the adverse effects of weld stacking, sudden change in stiffness and the reduction in fatigue strength of the welded structure due to the lack of additional treatment of the fillet welds. The U-shaped bending part 222 is formed twice, and the weld between the U-shaped bending part 222 and the lower end beam at the U-shaped groove is a fillet weld with a bevel in the front and rear directions, and the weld is polished on the rear side so that the weld does not exceed the inner surface of the lower end beam. The two ends use butt welding and fillet welds with a bevel, and the welds are polished until they are flush with the upper surface of the lower end beam; the U-shaped bending part 222 has good bending resistance, and the weld when connected to the lower end beam is polished accordingly by comprehensively considering the weld characteristics and the influence of stress concentration on the fatigue strength of the part. The U-shaped groove of the lower end beam reserves sufficient operating space in the direction of the emergency shut-off valve opening handle, which is convenient for valve opening and subsequent maintenance.

[0037] The heating device 3 includes multiple longitudinal heating tubes 31 and annular heating tubes 32; the longitudinal heating tubes 31 are arranged on the lower outer wall of the tank body 1 along the longitudinal direction, and the multiple longitudinal heating tubes 31 are evenly distributed along the annular direction; the annular heating tubes 32 are arranged on the lower outer wall of the tank body 1 along the annular direction, and the annular heating tubes 32 are arranged at both ends of the longitudinal heating tubes 31 and are connected to the longitudinal heating tubes 31; the annular heating tubes 32 are respectively connected to the air intake pipe and the exhaust pipe, and the air intake pipe and the exhaust pipe are arranged on both sides below the rear end frame 22, and a drain valve is provided at the lowest point of the exhaust pipe.

[0038] The lower heating area of ​​the tank body 1 corresponding to the heating device 3 is sprayed with high-temperature resistant anti-corrosion primer.

[0039] More specifically, considering the suitability for transporting and storing low-density media with certain boiling points at room temperature, multiple longitudinal heating pipes are installed within a 120° wrap angle at the bottom of the tank body, forming a parallel structure with annular heating grooves at both ends of the bottom. Taking into account heat transfer efficiency and heat radiation area, the longitudinal heating pipes are rationally arranged along the circumference to ensure uniform steam distribution within the heating area and effective heating in the radiation area. Steam inlet and drain steam grooves are located near the bottom discharge end, and the outlet steam inlet and exhaust pipes are located on both sides of the end frame of the bottom discharge end for easy user operation. A steam trap is installed at the lowest point of the exhaust pipe to ensure the timely discharge of condensate during the initial heating stage. To address the issue of water accumulation in the annular heating groove near the other end of the tank bottom, the cross-section of a longitudinal heating pipe near the center of the tank bottom and connected to the horizontal area of ​​the annular groove was optimized. The connection between the longitudinal heating pipe and the annular grooves at both ends was changed from a socket-type fillet weld to a butt-type butt weld. The lower end of the tank is lower than the other end, further allowing the condensed water in the annular groove to be transferred through the longitudinal heating pipe to the drainage annular groove and discharged through the drain pipe to the steam trap. Considering that the insulation material is in direct contact with austenitic stainless steel, the stress corrosion caused by the chloride ion corrosion environment is more likely to occur in the heating area. Therefore, a high-temperature resistant anti-corrosion primer is sprayed in the heating area of ​​the tank bottom.

[0040] The insulation device 4 includes a rock wool board, a polyurethane circumferential support, and an outer covering board; the rock wool board is laid outside the tank body 1 and the heating device 3, the polyurethane circumferential support is arranged outside the tank body 1 along the circumferential direction, and the outer covering board is covered on the outside of the rock wool board and the polyurethane circumferential support; the rock wool board is laid tightly and fixed with a strapping tape; the outer covering board is made of fiberglass, and the overlap of the outer covering board is bonded with butyl caulking glue, and the edge of the outer covering board is sealed and filled with silicone weather-resistant glue; reinforced aluminum foil is laid in the middle of both sides of the cylinder of the tank body 1 and the center of the head where the rock wool board cannot be laid, and the edges and seams of the reinforced aluminum foil are bonded and fixed with aluminum foil tape.

[0041] More specifically, to ensure the heating effect and avoid repeated heating and unloading during short-distance transportation, an insulation structure with light weight, moderate cost and good insulation performance is set up outside the tank body and heating area. The insulation material of this insulation structure is rock wool board with moderate density, which is laid with a thickness of 40mm where space allows. In the middle of both sides of the cylinder and the small area in the center of the head where rock wool cannot be laid, reinforced aluminum foil is laid. The edges and joints of the aluminum foil are bonded and fixed with aluminum foil tape. The rock wool board is laid tightly and fixed with strapping tape; an outer cover is set outside the rock wool board, and the overlap of the outer cover is bonded with butyl caulking glue, and the edges of the outer cover are sealed with silicone weather-resistant glue; the outer cover is made of fiberglass with light weight, sufficient strength and good impact resistance; multiple high-density polyurethanes are set along the direction of the tank body as circumferential supports, which together with the tightly wrapped rock wool ensure the overall shape of the insulation shell.

[0042] The discharge valve 11 includes a root emergency shut-off valve 111, a clamping butterfly valve 112, an end BSP joint and a plug cover 113. The root emergency shut-off valve 111 is equipped with a manual opening handle, a remote mechanical operating system and a fusible alloy plug for emergency shut-off in response to sudden fire situations. A gas-liquid linkage locking device is provided between the discharge valve 11 and the top air ball valve 9 to ensure that the air ball valve 9 is in an open state before the discharge valve 11 is opened, so as to avoid the risk of pressure buildup and instability of the tank body 1. A discharge valve protection box 19 is provided at the discharge valve 11.

[0043] The bottom of the straight skirt 14 connected between the rear end of the tank body 1 and the rear end frame 22 is disconnected to provide installation space for the discharge valve 11, and a discharge valve protection box 19 is set at the disconnection point. The disconnected edge of the straight skirt 14 is pressed by a reinforcing pad 15 and a reinforcing part 16 to prevent the risk of tearing at the disconnection point between the straight skirt 14 and the head of the tank body 1.

[0044] The end ladder 5 is arranged on the right side of the rear end frame 22. The end ladder 5 includes two ladder columns and anti-slip footrests. The ladder columns and anti-slip footrests are made of thin-walled stainless steel square tubes. The end ladder 5 is connected to the rear end frame 22 with bolts for easy disassembly and replacement; the walkway assembly 6 includes a walkway and a walkway support. The walkway and the walkway support are connected by bolts. The walkway width is 475mm and the material is aluminum alloy. The walkway support is fixed to the upper side beam 23 through the root support. The walkway support and the root support are connected by bolts. The root support is welded to the upper side beam 23, which improves the convenience of assembly and later replacement of the insulation device.

[0045] The manhole 7 and the safety valve 8 are arranged near the center of the top of the tank body 1, and a protection box I17 is provided around the manhole 7 and the safety valve 8; the air ball valve 9 and the spare port 10 are arranged near the rear of the top of the tank body 1. When transporting dangerous liquid goods, a butterfly valve is installed on the spare port 10 for feeding. A protection box II18 is provided around the air ball valve 9 and the spare port 10 to protect the valve body.

[0046] The present invention realizes the maximum volume within a given frame. The tank body adopts a non-circular cross-section structure. The tank body of this embodiment adopts a square-round cross-section. The most obvious feature of the square-round cross-section tank body is that it can make full use of the cross-sectional dimensions of the frame to maximize the volume. The longitudinal dimension limit of the frame is taken into consideration during the design. The front head is located in the front frame, where the insulation shell can be installed without interfering with the lower diagonal brace of the end frame. The tank body is basically in the limit position. The rear frame reserves space for the installation and operation of the bottom unloading combination valve. The length of the cylinder is maximized and the volume is 30m 3 .

[0047] The present invention achieves a small increase in deadweight and a large improvement in carrying capacity. The guideline for the tank container is T4, and the minimum water pressure test pressure is 0.265 MPa. Compared with ordinary liquid cargo tank containers, the test pressure is increased by 77%. In order to increase the overall deformation ability of the square-circular cross-section tank body to resist internal and external pressures, multiple I-shaped circumferential reinforcement rings are evenly distributed inside the tank body along the calculated length direction, and multiple trapezoidal cross-section longitudinal reinforcement parts are arranged along the circumferential direction on the outside of the tank body. Through joint internal and external reinforcement, the strength and stability of the square-circular cross-section tank body under internal and external pressures are improved. The analytical design method is used to evaluate the strength of the tank body under pressure test conditions, and the stability of the tank container under internal and external pressure conditions is comprehensively evaluated. The rigidity of the tank body is reasonably enhanced to ensure that the tank body and components connected to the tank body will not become unstable under typical working conditions.

[0048] Under the premise of ensuring that the overall strength of the tank container meets the requirements, the present invention performs lightweight design on the tank container, performs lightweight design on areas with large safety margins, and optimizes the structure of high-risk locations to achieve a smooth transition in stiffness and reduce welding residual stress and stress concentration.

[0049] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0051] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte, characterized in that, The tank container has a volume of 30 m 3 It is a large-load dangerous goods tank container with a tank container guide of T4, capable of transporting dangerous goods and non-dangerous goods with a tank container guide not greater than T4. The tank container includes a tank body (1), a frame (2), a heating device (3), a heat preservation device (4), an end ladder (5), and a walkway assembly (6). The tank body (1) has a non-circular cross-section structure. A manhole (7), a safety valve (8), an air ball valve (9) and a spare port (10) are provided at the top of the tank body (1); a liquid discharge hole is provided at the bottom of the rear head of the tank body (1), and a discharge valve (11) is installed there; the tank body (1) adopts an upper loading and lower unloading method; a circumferential reinforcing ring (12) with an I-shaped cross-section is arranged on the inner wall of the tank body (1), and a longitudinal reinforcing member (13) with a trapezoidal cross-section is arranged on the outer wall of the tank body (1); the tank body (1) is arranged in a frame (2), and the two ends of the tank body (1) are connected to the frame (2) by a straight cylindrical skirt support (14); the end ladder (5) is arranged on the rear end frame (22) of the frame (2), and the walkway assembly (6) is arranged on the top of the frame (2); the heating device (3) is arranged on the outer wall of the lower part of the tank body (1), and a heat preservation device (4) is arranged outside the tank body (1) and the heating device (3).

2. The large-capacity dangerous goods tank container for transporting low-risk and low-density electrolyte according to claim 1, characterized in that, The frame (2) includes a front end frame (21), a rear end frame (22), and two upper side beams (23) and two lower side beams (24) connecting the two; both the front end frame (21) and the rear end frame (22) are square structures surrounded by an upper end beam, corner columns, a lower end beam and corner columns in sequence, and diagonal braces are provided at the four corners of the front end frame (21) and the rear end frame (22); the corner columns are made of high-strength weather-resistant steel, the lower side beams (24) are made of rectangular tubes with good anti-vertical flexure performance, and the upper end beam and the upper side beams (23) are made of thin-walled steel sections.

3. The large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte according to claim 2, characterized in that, A U-shaped groove is opened on the upper surface of the middle part of the lower end beam of the rear end frame (22) to facilitate the installation of the discharge valve (11) and reserve sufficient operating space for it; a full-length reinforcing plate (221) is arranged on the bottom surface of the lower end beam of the rear end frame (22), and a U-shaped bending part (222) is welded on the inner surface of the U-shaped groove. The weld between the U-shaped bending part (222) and the lower end beam where the U-shaped groove is opened is a fillet weld with a bevel in the front-rear direction, and the weld on the rear side is polished so that the weld does not exceed the inner side surface of the lower end beam. The two ends are butt welds and fillet welds with bevels, and the welds are polished to be flush with the upper surface of the lower end beam; the U-shaped bending part (222) has bending resistance, and when connecting with the lower end beam, the welds comprehensively consider the influence of weld characteristics and stress concentration on the fatigue strength at this place, and corresponding polishing treatment is carried out.

4. The large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte according to claim 1, characterized in that The heating device (3) includes a plurality of longitudinal heating tubes (31) and a circumferential heating tube (32); the longitudinal heating tubes (31) are arranged longitudinally on the outer wall of the lower part of the tank body (1), and a plurality of longitudinal heating tubes (31) are evenly distributed at intervals in the circumferential direction; the circumferential heating tube (32) is arranged circumferentially on the outer wall of the lower part of the tank body (1), the circumferential heating tube (32) is arranged at both ends of the longitudinal heating tubes (31), and the circumferential heating tube (32) is communicated with the longitudinal heating tubes (31); the circumferential heating tube (32) is respectively connected with an air inlet pipe and an exhaust pipe, the air inlet pipe and the exhaust pipe are arranged on both sides below the rear end frame (22), and a drain valve is arranged at the lowest point of the exhaust pipe.

5. The large-capacity dangerous goods tank container for transporting low-risk and low-density electrolyte according to claim 1, wherein A high-temperature resistant and corrosion-resistant primer is sprayed within the range of the lower heating area of the tank body (1) corresponding to the heating device (3).

6. The large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte according to claim 1, characterized in that, The heat preservation device (4) includes a rock wool board, a polyurethane circumferential support, and an outer cladding plate. The rock wool board is laid outside the tank body (1) and the heating device (3). The polyurethane circumferential support is arranged circumferentially outside the tank body (1). The outer cladding plate covers the rock wool board and the polyurethane circumferential support. The rock wool board is laid tightly and fixed with strapping bands. The outer cladding plate is made of fiberglass. The lap joint of the outer cladding plate is bonded with butyl caulking gum, and the edge of the outer cladding plate is sealed and filled with silicone weatherproof glue. Reinforced aluminum foil paper is laid in the areas where the rock wool board cannot be laid in the middle of both sides of the cylinder body of the tank body (1) and at the center of the head. The edge and seam of the reinforced aluminum foil paper are bonded and fixed with aluminum foil tape.

7. The large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte according to claim 1, characterized in that, The discharge valve (11) includes a root emergency cut-off valve (111), a clamping butterfly valve (112), an end BSP joint, and a plug (113). The root emergency cut-off valve (111) is equipped with a manually operable handle, a remote mechanical operating system, and a fusible alloy plug for emergency cut-off in case of sudden fire. A gas-liquid interlocking locking device is arranged between the discharge valve (11) and the top air ball valve (9) to ensure that the air ball valve (9) is in the open state before the discharge valve (11) is opened, avoiding the risk of pressure buildup and instability of the tank body (1). A discharge valve protection box (19) is arranged at the discharge valve (11).

8. The large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte according to claim 1, characterized in that, The bottom of the straight skirt support (14) connecting the rear end of the tank body (1) and the rear end frame (22) is disconnected to provide an installation space for the discharge valve (11). A discharge valve protection box (19) is arranged at the disconnection. The disconnection edge of the straight skirt support (14) is flanged with a reinforcing backing plate (15) and a reinforcing member (16) to prevent the risk of tearing at the disconnection between the straight skirt support (14) and the head of the tank body (1).

9. The large-capacity dangerous goods tank container for transporting low-risk small-density electrolyte according to claim 2, characterized in that, The end ladder (5) is arranged on the right side of the rear end frame (22). The end ladder (5) includes two ladder posts and anti-slip footrests. Both the ladder posts and the anti-slip footrests are made of thin-walled stainless steel square tubes. The end ladder (5) is connected to the rear end frame (22) by bolts for easy disassembly and replacement. The walkway assembly (6) includes a walkway and walkway supports. The walkway and the walkway supports are connected by bolts. The width of the walkway is 475 mm, and the material is aluminum alloy. The walkway supports are fixed to the upper side beam (23) through root supports. The walkway supports and the root supports are connected by bolts, and the root supports are welded to the upper side beam (23).

10. The large-capacity dangerous goods tank container for transporting low-risk and low-density electrolyte according to claim 1, characterized in that, The manhole (7) and the safety valve (8) are arranged at the top of the tank body (1) near the central position. A protection box I (17) is arranged around the manhole (7) and the safety valve (8). The air ball valve (9) and the spare port (10) are arranged at the top of the tank body (1) near the rear position. When shipping dangerous liquid goods, a butterfly valve is installed on the spare port (10) for feeding. A protection box II (18) is arranged around the air ball valve (9) and the spare port (10) to protect the valve body.

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