Tank container capable of loading and unloading on both sides

Abstract

A tank container capable of loading and unloading on both sides, comprising a frame assembly body (100) and a tank assembly body (200). The frame assembly body comprises two end frames (110), and upper side beams (101) and two lower side beam assemblies (120) that connect the two end frames. The tank assembly body comprises a cylinder (203) and end caps (201); the cylinder is provided with a safety valve (220) communicated with a cavity, a bottom loading and unloading device (250), a vapor recovery system (270), and a pneumatic control system (260); the bottom loading and unloading device comprises two loading and unloading connectors provided on both sides of the cylinder; and the loading and unloading connectors are communicated with the bottom of the cavity by means of a loading and unloading pipe. Each lower side beam assembly comprises a lower side beam (121) and a lower side reinforcing beam, the lower side beam is provided with a loading and unloading slot corresponding to the position of the corresponding loading and unloading connector, the lower side reinforcing beam is arranged above the loading and unloading slot, and the upper surface and the lower side surface of the lower side beam at the position of the loading and unloading slot are provided with reinforcing structures.

Description

A tank container with loading and unloading from both sides Technical Field

[0001] This invention relates to containers, and more specifically to a tank container that can be loaded and unloaded from both sides. Background Technology

[0002] Currently, the transportation of liquid, gas, and powdered solid goods is mainly carried out through three modes: rail transport, road transport, and combined rail-road transport.

[0003] For rail transport, tank cars are the primary mode of transportation. However, this method suffers from high fixed costs, large initial investments, and is difficult to organize, resulting in long transit times. Furthermore, it cannot provide door-to-door service, and the associated ground infrastructure and matching issues are complex. Therefore, rail tank car transport is not economically viable for short-distance transport.

[0004] For road transport, tank trucks are the primary mode of transportation. However, this method suffers from high energy consumption, numerous safety hazards, large land occupation, and is severely affected by weather conditions, while also having limited transport capacity. Consequently, tank truck transport is not economically viable for long-distance transport.

[0005] For combined road-rail transport, tank containers are generally used in conjunction with railway flatcars. This method effectively addresses the shortcomings of the two methods mentioned above, significantly improving the economic efficiency of transportation. However, it places high demands on the tank containers used.

[0006] Currently, the industry mostly uses bottom-loading tank containers. Due to their structural characteristics, the bottom-loading port of tank containers is located at the rear; however, this location is also equipped with door barriers to prevent the container from slipping off. When the tank container lands on a railway flatcar, the bottom-loading port is blocked by the door barriers, making loading and unloading impossible. Therefore, even if both ends of the tank container have dedicated lines and loading / unloading positions, it still needs to be unloaded from the railway flatcar first, transferred, and then the loading and unloading can be completed. This results in complex freight organization, excessive energy and manpower consumption, and poor economic efficiency.

[0007] Chinese patent CN117302783A discloses a large-capacity liquid tank container that can be interconnected, including several tank assemblies. Each tank assembly includes a frame and a tank fixed within the frame for storing liquid. Each tank is equipped with a loading and unloading pipeline system for controlling the on / off of the loading and unloading oil passages within the tank, as well as a transmission component. The transmission component is used to connect two adjacent tanks, so that when the loading and unloading pipeline system on any one tank is working, it can simultaneously drive the loading and unloading operations of other tanks.

[0008] The tank container features an opening at the lower side beam to avoid interference, but only provides unloading on one side. Ground loading and unloading points typically have a single or a row of loading and unloading ports, requiring transport vehicles to park precisely on the tank container's loading and unloading side. While this is manageable for road trucks, it remains inefficient and costly for railcars used in parallel loading and unloading operations, failing to address the aforementioned issues. Therefore, this method is unlikely to meet the needs of tank containers in multimodal transport (road-rail). Summary of the Invention

[0009] The purpose of this invention is to solve the technical problems of existing tank containers, which lead to complex freight organization, excessive energy and manpower consumption, and poor economic efficiency, and to provide a tank container with loading and unloading from both sides.

[0010] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0011] A tank container with loading and unloading from both sides includes a frame assembly and a tank assembly disposed within the frame assembly.

[0012] The frame assembly includes two parallel end frames, and two upper side beams and two lower side beams connecting the two end frames; diagonal braces are provided between the end frames and the upper side beams.

[0013] The tank assembly includes a cylindrical body and two end caps located at both ends of the cylindrical body. The cylindrical body and the end caps form a cavity for storing goods to be transported. Skirts are also provided on the outer periphery of both ends of the cylindrical body. The frame assembly and the tank assembly are connected through the skirts.

[0014] Its special feature is:

[0015] The upper part of the cylinder is equipped with a safety valve that communicates with the cavity, and the lower part is equipped with a bottom loading and unloading device, a pneumatic control system and an oil and gas recovery system.

[0016] The bottom loading and unloading device includes two loading and unloading joints respectively located on both sides of the cylinder, and the loading and unloading joints are connected to the bottom of the cavity through loading and unloading pipes; the oil and gas recovery system includes two oil and gas recovery joints respectively located on both sides of the cylinder, and the oil and gas recovery joints are connected to the top of the cavity through oil and gas recovery pipes.

[0017] The pneumatic control system is connected to the air circuits of the bottom loading and unloading device and the oil and gas recovery system to control the opening and closing of the loading and unloading pipeline and the oil and gas recovery pipeline.

[0018] The lower beam assembly includes the lower beam and the lower reinforcement beam;

[0019] Both lower side beams have loading and unloading grooves corresponding to the positions of the two loading and unloading joints; the lower side reinforcing beam is set above the loading and unloading groove, and the lower side of the lower side beam located at the loading and unloading groove position and the surface of the loading and unloading groove are both provided with reinforcing structures to increase the structural strength of the loading and unloading groove.

[0020] Furthermore, the lower reinforcing beam includes a diagonal beam, a longitudinal beam, and at least two longitudinal beam supports;

[0021] One end of the inclined beam is connected to the lower side beam, and the other end is connected to one end of the longitudinal beam; the other end of the longitudinal beam is connected to the end frame; the included angle between the inclined beam and the lower side beam is less than 45°.

[0022] The longitudinal beams and the lower side beams are connected by longitudinal beam supports, and multiple longitudinal beam supports are respectively set on both sides of the loading and unloading groove; the pneumatic control system and the oil and gas recovery joint are set between the inclined beams, longitudinal beams, longitudinal beam supports and the lower side beams;

[0023] The reinforcing structure includes a first groove reinforcing plate and a second groove reinforcing plate;

[0024] The first groove reinforcement plate is located on the surface of the loading and unloading groove, and the second groove reinforcement plate is located on the lower side of the lower beam at the loading and unloading groove position.

[0025] The first groove reinforcement plate fits into the loading and unloading groove, and its outward extension length at both ends is greater than 50mm; the axial center line of the longitudinal beam and the axial position of the regional center of the reinforcement structure are symmetrical about the center of the inscribed circle of the loading and unloading groove; the center of this circle is connected to the upper edge of the two groove walls of the loading and unloading groove respectively, and the extension of the two connecting lines intersects the bottom edge of the lower side beam respectively, forming two intersection points, and the length of the second groove reinforcement plate is greater than the distance between the two intersection points.

[0026] Furthermore, the end frame is provided with two upper diagonal braces at the two upper corners and two lower diagonal brace assemblies at the two lower corners; the two lower diagonal brace assemblies are connected by a lower reinforcing plate, and the lower reinforcing plate is connected to the skirt.

[0027] Furthermore, the upper diagonal brace is a triangular reinforcing plate;

[0028] The upper edge of the lower reinforcing plate has an arc-shaped transition line;

[0029] The lower diagonal brace assembly includes a lower diagonal brace and a smaller diagonal brace arranged parallel to it with a gap; the two lower diagonal braces are connected by a lower reinforcing plate;

[0030] The lower side of the end frame and the corresponding positions of the two small diagonal braces are provided with avoidance grooves. Reinforcing plates are installed in the avoidance grooves. The width of the avoidance grooves is greater than the width of the standard corner piece.

[0031] Furthermore, the loading and unloading pipeline includes two segmented loading and unloading pipelines, which are respectively located on the lower sides of the cylinder. One end of each segmented loading and unloading pipeline is connected to the corresponding bottom valve of the cylinder, and the other end is connected to two loading and unloading joints respectively.

[0032] The oil and gas recovery pipeline includes an inner section pipeline and an outer section pipeline. The inner section pipeline is located inside the cylinder, with one end connected to a valve at the top of the cylinder and the other end extending out of the cylinder and connected to the middle of the outer section pipeline located below the cylinder. The two ends of the outer section pipeline are connected to two oil and gas recovery joints, respectively.

[0033] Furthermore, the inner section of the oil and gas recovery pipeline is an arc-shaped pipeline, which is installed along the inner wall of the cavity; the outer section of the oil and gas recovery pipeline bends upward near both ends and extends between the lower side beam and the lower side reinforcing beam.

[0034] The cavity is provided with at least two ring-shaped reinforcing ribs parallel to the circumference of the cylinder.

[0035] Furthermore, it also includes walkway assemblies mounted on the frame assembly;

[0036] Definition: The end of the tank assembly facing the direction of transport is the front end, and the other end is the rear end; the horizontal height of the front end of the tank assembly is greater than the horizontal height of the rear end, and the height difference is greater than 10mm;

[0037] The bottom loading and unloading device is located near the rear end;

[0038] The top of the cylinder is provided with a manhole that communicates with the cavity, and a detachable end ladder is provided on the end frame at the front end. The positions of the manhole and the end ladder correspond to the walkway assembly.

[0039] The cylinder is also equipped with an overflow protection device and a filling metering device connected to the pneumatic control system. The overflow protection device is used to automatically cut off the loading and unloading pipeline when there is too much cargo to be transported inside the cavity. The filling metering device is used to reserve a filling port and a liquid level metering port at the top.

[0040] Furthermore, the walkway assembly is an I-shaped walkway composed of multiple walkways spliced ​​together, with its edges connected to two upper side beams respectively;

[0041] The bottom loading and unloading device is located at the bottom of the cylinder near the rear end, and the two loading and unloading joints are positioned relative to the cylinder.

[0042] Furthermore, the axial cross-section of the cylinder is square-circular;

[0043] The frame assembly adopts the specifications of a high box frame.

[0044] Furthermore, the loading and unloading pipe is located inside the lower part of the cylinder, with a siphon pipe that communicates with the cavity and extends out of the cylinder at both ends and bends downward, and is connected to two loading and unloading joints.

[0045] The advantages of this invention compared to the prior art are:

[0046] 1. This invention provides a tank container with loading and unloading capabilities on both sides. The design incorporates a two-side loading and unloading scheme to meet the usage requirements of certain current railway lines and solve the loading and unloading problems of existing tank containers on flatcars. This scheme enables direct loading and unloading of goods on dedicated railway lines without transshipment of the tank container. It also accommodates both short-distance economical road transport and long-distance economical rail transport, saving transshipment links at both ends and improving ease of use and economy.

[0047] 2. The present invention provides a tank container with loading and unloading on both sides. By designing the structure according to the structure after loading and unloading on both sides, the tank assembly is raised while the frame assembly is reinforced accordingly. At the same time, based on the size limitations after the raising, a cylindrical body with a square and round cross section is adopted to achieve large volume and lightweight tank container, and solve the problems of insufficient strength, rigidity and stability caused by this, thereby improving the versatility and economy of tank container.

[0048] 3. The present invention provides a tank container with loading and unloading on both sides. In order to meet the safety, convenience and environmental protection requirements of tank container operation and loading and unloading site, an overflow protection device, a pneumatic control system and an oil and gas recovery system are set up, which effectively improves the safety, convenience and economy of the tank container. Attached Figure Description

[0049] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of a tank container with loading and unloading from both sides according to the present invention.

[0050] Figure 2 is a structural schematic diagram of the frame assembly in an embodiment of the present invention;

[0051] Figure 3 is a schematic diagram of the lower side beam assembly in an embodiment of the present invention;

[0052] Figure 4 is a schematic diagram of the end frame structure in an embodiment of the present invention;

[0053] Figure 5 is a structural schematic diagram of the tank assembly in an embodiment of the present invention;

[0054] Figure 6 is a schematic diagram of the loading and unloading pipeline in another embodiment of a tank container with loading and unloading from both sides according to the present invention.

[0055] Figure 7 is a schematic diagram of the location of the inner section of the oil and gas recovery pipeline in an embodiment of the present invention;

[0056] Figure 8 is a schematic diagram of the position of the inscribed circle of the lower side beam assembly in an embodiment of the present invention.

[0057] Reference numerals: 100-Frame assembly; 200-Tank assembly; 300-Walkway assembly; 110-End frame; 120-Lower side beam assembly; 101-Upper side beam; 102-Diagonal brace; 103-End ladder; 121-Lower side beam; 122-Diagonal beam; 123-Longitudinal beam; 124-Longitudinal beam support; 125-First groove reinforcing plate; 126-Second groove reinforcing plate; 131-Upper diagonal brace; 132-Lower side reinforcing plate; 133-Lower diagonal brace; 134-Small diagonal brace; 135-Avoidance groove; 201-End cap; 202-Skirt seat; 203-Cylinder body; 210-Manhole; 220-Safety valve; 230-Overflow protection device; 240-Filling metering device; 250-Bottom loading and unloading device; 260-Pneumatic control system; 270-Oil and gas recovery system. Detailed Implementation

[0058] The specific technical solutions in the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0059] Compared with existing transportation equipment for liquids, gases, and powdered solids, this invention combines the characteristics and needs of railway and road transportation and loading and unloading. It designs a tank container with a two-sided loading and unloading scheme, which is suitable for the transportation and loading and unloading needs of railway dedicated or shared flatcars, without the need to use road flatcars for transshipment and loading and unloading. This reduces the difficulty of freight organization, reduces energy and manpower consumption, and thus improves the economic efficiency of the product.

[0060] Technical Approach: To solve the loading and unloading problem, a two-sided loading and unloading scheme was designed to allow direct loading and unloading of goods on the dedicated railway line without transferring tank containers. Since loading and unloading joints on both sides would restrict bottom space, the tank body was raised relative to the frame. Raising the tank body required meeting the structural strength requirements of the frame, hence the use of a full-size frame. A full-size frame presents interference issues between the two-sided loading and unloading joints and the bottom of the frame; therefore, the lower side beams were modified with openings and local reinforcement. Furthermore, the tank body's volume would decrease due to overall dimensional requirements after raising it relative to the frame; therefore, a square-round cross-section tank body and a high-frame structure were used to increase the tank body's volume.

[0061] Meanwhile, this tank container, while taking into account the optimal technical parameters of existing tank containers, is equipped with safety loading and unloading accessories such as an overflow protection system, a pneumatic control system, and an oil and gas recovery system. This improves the safety of the tank container, simplifies the operation process for workers by adopting a pneumatic control system, and alleviates environmental pollution by adopting an oil and gas recovery system.

[0062] Referring to Figure 1, an embodiment of the present invention provides a tank container for loading and unloading from both sides, including a frame assembly 100, a tank assembly 200 disposed within the frame assembly 100, and a walkway assembly 300 disposed on the frame assembly 100.

[0063] Definition: The end of the tank assembly 200 facing the direction of transport is the front end, and the other end is the rear end. The horizontal height of the front end is greater than that of the rear end, and the height difference is greater than 10mm, to ensure the media unloading rate.

[0064] Referring to Figure 2, the frame assembly 100 adopts the specifications of a high box frame, including two parallel end frames 110, and two upper side beams 101 and two lower side beam assemblies 120 connecting the two end frames 110; diagonal braces 102 are provided between the end frames 110 and the upper side beams 101. The components are welded together.

[0065] The end frame 110 at the front end is provided with a bolt-mounted and detachable end ladder 103; the walkway assembly 300 is an I-shaped walkway spliced ​​from multiple walkways, and its edges are respectively connected to two upper side beams 101 to improve the structural strength of the upper side beams 101.

[0066] Referring to Figure 5, the tank assembly 200 includes a cylindrical body 203 and two end caps 201 disposed at both ends of the cylindrical body 203. The cylindrical body 203 and the end caps 201 form a cavity for storing goods to be transported. The axial cross-section of the cylindrical body 203 is square-round. Skirts 202 are also provided on the outer periphery of both ends of the cylindrical body 203. The frame assembly 100 and the tank assembly 200 are connected through the skirts 202.

[0067] The upper part of the cylinder 203 is provided with a manhole 210 communicating with the cavity, a safety valve 220, an overflow protection device 230 and a filling metering device 240, and the lower part is provided with a bottom loading and unloading device 250, a pneumatic control system 260 and an oil and gas recovery system 270; the positions of the manhole 210 and the end ladder 103 correspond to the walkway assembly 300; the overflow protection device 230 and the filling metering device 240 are connected to the pneumatic control system 260.

[0068] Safety valve 220 protects the cylinder 203, ensuring the cavity pressure remains within the designed pressure range. Overflow protection device 230 automatically shuts off the filling system in case of abnormal filling conditions, such as when the liquid level exceeds a limit, to prevent overflow. Filling metering device 240 has a top filling port and a liquid level metering port. Pneumatic control system 260 allows remote sequential operation via control panel to open oil and gas recovery system 270 and bottom loading / unloading system 250 for loading and unloading operations, improving the safety and convenience of tank container use. Oil and gas recovery system 270 effectively recovers oil and gas from the gas phase space inside the tank while balancing the cavity loading and unloading pressure, preventing oil and gas emissions from polluting the environment and improving economic efficiency.

[0069] The bottom loading and unloading device 250 includes two loading and unloading joints respectively disposed on both sides of the cylinder 203. The loading and unloading joints are connected to the bottom of the cavity through loading and unloading pipes. The bottom loading and unloading device 250 is located below the cylinder 203 near the rear end, and the two loading and unloading joints are positioned correspondingly to the cylinder 203. The loading and unloading pipes include two segmented loading and unloading pipes, which are respectively disposed on both sides below the cylinder 203. One end of each segmented loading and unloading pipe is connected to the corresponding bottom valve of the cylinder 203, and the other end is connected to the two loading and unloading joints respectively.

[0070] The oil and gas recovery system 270 includes two oil and gas recovery connectors respectively located on both sides of the cylinder 203. These connectors are connected to the top of the cavity via oil and gas recovery pipes. The oil and gas recovery pipe includes an inner section and an outer section. The inner section is located inside the cylinder 203, with one end connected to a valve at the top of the cylinder 203 and the other end extending out of the cylinder 203 and connected to the middle of the outer section located below the cylinder 203. Both ends of the outer section are connected to the two oil and gas recovery connectors. The inner section of the oil and gas recovery pipe is an arc-shaped pipe, arranged along the inner wall of the cavity. The outer section of the oil and gas recovery pipe bends upwards near both ends, extending between the lower side beam 121 and the lower side reinforcing beam. At least two annular plate-shaped reinforcing ribs are arranged parallel to each other along the circumference of the cylinder 203 inside the cavity.

[0071] The inner section of the oil and gas recovery pipeline is located inside the cylinder 203. This is because external space is limited, making it impossible to place pipelines there, as this would reduce the tank volume and decrease the tank's economic efficiency. Secondly, pipelines outside the tank are less durable than those inside, posing risks of external damage and corrosion. Furthermore, tank deformation often occurs during transportation. To accommodate this deformation, as shown in Figure 7, the inner section pipeline is designed as an arc-shaped pipe to prevent weld fatigue cracking at the joints at both ends.

[0072] The pneumatic control system 260 is connected to the bottom loading and unloading device 250 and the oil and gas recovery system 270 respectively to control the opening and closing of the loading and unloading pipeline and the oil and gas recovery pipeline.

[0073] Referring to Figure 3, the lower beam assembly 120 includes a lower beam 121 and a lower reinforcing beam; the lower reinforcing beam includes an inclined beam 122, a longitudinal beam 123 and two longitudinal beam supports 124.

[0074] One end of the inclined beam 122 is connected to the lower side beam 121, and the other end is connected to one end of the longitudinal beam 123; the other end of the longitudinal beam 123 is connected to the end frame 110; the included angle between the inclined beam 122 and the lower side beam 121 is less than 45° to meet the strength and bending resistance requirements of the lower side beam 121 when subjected to longitudinal impact; the longitudinal beam 123 and the lower side beam 121 are connected by a longitudinal beam support 124, and the two longitudinal beam supports 124 are respectively set on both sides of the loading and unloading groove; the pneumatic control system 260 and the oil and gas recovery connector are set between the inclined beam 122, the longitudinal beam 123, the longitudinal beam support 124 and the lower side beam 121.

[0075] Both lower side beams 121 are provided with loading and unloading grooves corresponding to the positions of the two loading and unloading joints; the lower side reinforcing beam is set above the loading and unloading groove, and the lower side of the lower side beam 121 located at the loading and unloading groove position and the surface of the loading and unloading groove are provided with reinforcing structures to increase the structural strength of the loading and unloading groove, ensure the continuity of the structure and meet the requirements of strength and rigidity, and ensure the structural safety of the tank container when subjected to longitudinal impact.

[0076] The reinforcing structure includes a first groove reinforcing plate 125 and a second groove reinforcing plate 126. The first groove reinforcing plate 125 is located on the surface of the loading and unloading groove, and the second groove reinforcing plate 126 is located on the lower side of the lower beam 121 at the loading and unloading groove position.

[0077] The first groove reinforcing plate 125 fits into the loading and unloading groove, and its outward extension length at both ends is greater than 50mm to meet the welding position requirements.

[0078] Referring to Figure 8, the axial centerline of the longitudinal beam 123 and the axial position of the regional center of the reinforcing structure (that is, the middle position of the first groove reinforcing plate 125 and the second groove reinforcing plate 126) are symmetrical about the center of the inscribed circle of the loading and unloading groove. The center of this circle is connected to the upper edge of the two groove walls of the loading and unloading groove, and the extension of the two connecting lines intersects the bottom edge of the lower side beam 121, forming two intersection points. The length of the second groove reinforcing plate 126 is greater than the distance between the two intersection points, so as to compensate for the strength and stiffness loss at the opening to the greatest extent.

[0079] Referring to Figure 4, the end frame 110 has two upper diagonal braces 131 at the two upper corners and two lower diagonal brace assemblies at the two lower corners; the two lower diagonal brace assemblies are connected by a lower reinforcing plate 132, and the lower reinforcing plate 132 is connected to the skirt 202.

[0080] The upper diagonal brace 131 is a triangular reinforcing plate; the upper edge of the lower reinforcing plate 132 is an arc-shaped transition line, which utilizes the stability of the triangle and allows the skirt 202 to rest on the upper diagonal brace 131. After the tank is raised, the skirt 202 cannot be directly connected to the end frame 110, so it is connected to the lower reinforcing plate 132, making the transmission of longitudinal force more direct.

[0081] The lower diagonal brace assembly includes a lower diagonal brace 133 and a small diagonal brace 134 arranged parallel to it with a gap; the two lower diagonal braces 133 are connected by a lower reinforcing plate 132; the lower side of the end frame 110 is provided with a clearance groove 135 at the corresponding position of the two small diagonal braces 134, and a reinforcing plate is provided in the clearance groove 135. The width of the clearance groove 135 is greater than the width of the standard corner piece to solve the problem of tank container stacking misalignment that is not easy to detect. That is, by amplifying the degree of skew between the two tank containers by the clearance groove 135, the operator is reminded that the tank containers are not stacked correctly when they are not stacked properly.

[0082] In other embodiments of the present invention, the siphon principle can be used to draw liquid cargo out from the loading and unloading pipe during unloading. Referring to Figure 6, the loading and unloading pipe is located inside the lower part of the cylinder 203, with a siphon tube communicating with the cavity in the middle facing downwards. Both ends extend out of the cylinder 203 and bend downwards, connecting to two loading and unloading joints. This can increase the tank volume to a greater extent and improve the media unloading rate.

[0083] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are included within the patent protection scope of the present invention. It will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tank container with loading and unloading from both sides, comprising a frame assembly (100) and a tank assembly (200) disposed within the frame assembly (100); The frame assembly (100) includes two parallel end frames (110), and two upper side beams (101) and two lower side beam assemblies (120) connecting the two end frames (110); diagonal braces (102) are provided between the end frames (110) and the upper side beams (101); The tank assembly (200) includes a cylindrical body (203) and two end caps (201) disposed at both ends of the cylindrical body (203). The cylindrical body (203) and the end caps (201) form a cavity for storing goods to be transported. Skirts (202) are also provided on the outer periphery of both ends of the cylindrical body (203). The frame assembly (100) and the tank assembly (200) are connected through the skirts (202). Its features are: The cylinder (203) is provided with a safety valve (220) communicating with the cavity at the top and a bottom loading and unloading device (250), a pneumatic control system (260) and an oil and gas recovery system (270) at the bottom. The bottom loading and unloading device (250) includes two loading and unloading joints respectively disposed on both sides of the cylinder (203), and the loading and unloading joints are connected to the bottom of the cavity through loading and unloading pipes; the oil and gas recovery system (270) includes two oil and gas recovery joints respectively disposed on both sides of the cylinder (203), and the oil and gas recovery joints are connected to the top of the cavity through oil and gas recovery pipes; The pneumatic control system (260) is connected to the bottom loading and unloading device (250) and the oil and gas recovery system (270) respectively to control the opening and closing of the loading and unloading pipeline and the oil and gas recovery pipeline; The lower side beam assembly (120) includes a lower side beam (121) and a lower side reinforcing beam; Both of the lower side beams (121) are provided with loading and unloading grooves corresponding to the positions of the two loading and unloading joints; the lower side reinforcing beam is set above the loading and unloading groove, and the lower side of the lower side beam (121) located at the loading and unloading groove position and the surface of the loading and unloading groove are provided with reinforcing structures to increase the structural strength of the loading and unloading groove.

2. A tank container with loading and unloading from both sides according to claim 1, characterized in that: The lower reinforcing beam includes a diagonal beam (122), a longitudinal beam (123), and at least two longitudinal beam supports (124); One end of the inclined beam (122) is connected to the lower side beam (121), and the other end is connected to one end of the longitudinal beam (123); the other end of the longitudinal beam (123) is connected to the end frame (110); the included angle between the inclined beam (122) and the lower side beam (121) is less than 45°; The longitudinal beam (123) and the lower side beam (121) are connected by longitudinal beam supports (124), and multiple longitudinal beam supports (124) are respectively arranged on both sides of the loading and unloading groove; the pneumatic control system (260) and the oil and gas recovery connector are arranged between the inclined beam (122), the longitudinal beam (123), the longitudinal beam supports (124) and the lower side beam (121); The reinforcing structure includes a first groove reinforcing plate (125) and a second groove reinforcing plate (126); The first groove reinforcing plate (125) is located on the surface of the loading and unloading groove, and the second groove reinforcing plate (126) is disposed on the lower side of the lower side beam (121) located at the loading and unloading groove position; The first groove reinforcement plate (125) fits into the loading and unloading groove, and its outward extension length at both ends is greater than 50mm; the axial center line of the longitudinal beam (123) and the axial position of the regional center of the reinforcement structure are symmetrical about the center of the inscribed circle of the loading and unloading groove; the center of the circle is connected to the upper edge of the two groove walls of the loading and unloading groove respectively, and the extension of the two connecting lines intersects the bottom edge of the lower side beam (121) respectively, forming two intersection points, and the length of the second groove reinforcement plate (126) is greater than the distance between the two intersection points.

3. A tank container with loading and unloading from both sides according to claim 2, characterized in that: The end frame (110) is provided with two upper diagonal braces (131) at the two upper corners and two lower diagonal brace assemblies at the two lower corners; the two lower diagonal brace assemblies are connected by a lower reinforcing plate (132), and the lower reinforcing plate (132) is connected to the skirt seat (202).

4. A tank container with loading and unloading from both sides according to claim 3, characterized in that: The upper diagonal brace (131) is a triangular reinforcing plate; The upper edge of the lower reinforcing plate (132) is an arc-shaped transition line; The lower diagonal brace assembly includes a lower diagonal brace (133) and a small diagonal brace (134) arranged parallel to it with a gap; the two lower diagonal braces (133) are connected by a lower reinforcing plate (132); The lower side of the end frame (110) is provided with a clearance groove (135) corresponding to the two small diagonal braces (134). A reinforcing plate is provided in the clearance groove (135). The width of the clearance groove (135) is greater than the width of the standard corner piece.

5. A tank container with loading and unloading from both sides according to any one of claims 1-4, characterized in that: The loading and unloading pipeline includes two segmented loading and unloading pipelines, which are respectively located on the lower sides of the cylinder (203). One end of each segmented loading and unloading pipeline is connected to the corresponding bottom valve of the cylinder (203), and the other end is connected to the two loading and unloading joints respectively. The oil and gas recovery pipeline includes an inner section pipeline and an outer section pipeline. The inner section pipeline is located inside the cylinder (203), with one end connected to the top valve of the cylinder (203) and the other end extending out of the cylinder (203) and connected to the middle of the outer section pipeline located below the cylinder (203). The two ends of the outer section pipeline are respectively connected to the two oil and gas recovery joints.

6. A tank container with loading and unloading from both sides according to claim 5, characterized in that: The inner section of the oil and gas recovery pipeline is an arc-shaped pipeline, which is set along the inner wall of the cavity; the outer section of the oil and gas recovery pipeline bends upward near both ends and extends between the lower side beam (121) and the lower side reinforcing beam. The cavity is provided with at least two ring-shaped reinforcing ribs parallel to the circumference of the cylinder (203).

7. A tank container with loading and unloading from both sides according to claim 6, characterized in that: It also includes a walkway assembly (300) mounted on the frame assembly (100); Definition: The end of the tank assembly (200) facing the transportation direction is the front end, and the other end is the rear end; the horizontal height of the front end of the tank assembly (200) is greater than the horizontal height of the rear end, and the height difference is greater than 10mm; The bottom loading and unloading device (250) is located near the rear end; The top of the cylinder (203) is provided with a manhole (210) communicating with the cavity, and a detachable end ladder (103) is provided on the end frame (110) at the front end. The positions of the manhole (210) and the end ladder (103) correspond to the walkway assembly (300). Above the cylinder (203) are an overflow protection device (230) and a filling metering device (240) connected to the pneumatic control system (260). The overflow protection device (230) is used to automatically cut off the loading and unloading pipeline when there is too much cargo to be transported inside the cavity. The filling metering device (240) is used to reserve a filling port and a liquid level metering port at the top.

8. A tank container with loading and unloading from both sides according to claim 7, characterized in that: The walkway assembly (300) is an I-shaped walkway composed of multiple walkways spliced ​​together, and its edges are respectively connected to the two upper side beams (101); The bottom loading and unloading device (250) is located below the cylinder (203) near the rear end, and the two loading and unloading joints are positioned relative to the cylinder (203).

9. A tank container with loading and unloading from both sides according to claim 8, characterized in that: The axial cross section of the cylinder (203) is square-circular; The frame assembly (100) is selected from the specifications of a high box frame.

10. A tank container with loading and unloading from both sides according to any one of claims 1-4, characterized in that: The loading and unloading pipe is located inside the lower part of the cylinder (203), with a siphon pipe that communicates with the cavity and is located in the middle downward. Both ends of the siphon pipe extend out of the cylinder (203) and bend downward, and are connected to the two loading and unloading joints.

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