A cryogenic liquid transport semitrailer

Abstract

The present invention discloses a cryogenic liquid transport semitrailer, comprising: a tank body, an inner liner is arranged in the tank body, a traction seat is fixed on the front lower part of the tank body, two auxiliary beams are fixed on the rear lower part of the tank body, a walking mechanism is arranged under the two auxiliary beams, two supporting legs are installed on the front lower part of the tank body, an operating box is also arranged on the tank body, and the outer side of the inner liner is covered with a polyurethane foam insulation layer and an outer shell skin in sequence; the structure of the traction seat also includes: a traction base plate and a cylindrical support frame, a traction pin is fixed on the traction base plate, the top end of the cylindrical support frame is fixed to the inner liner, the bottom end of the cylindrical support frame is fixed to the traction base plate through an insulating structure, and the inner cavities of the cylindrical support frame and the two auxiliary beams are filled with polyurethane foam material through their respective filling ports; the two supporting legs and the operating box are fixed to the inner liner through the insulating support plate. The above-mentioned semitrailer has excellent insulation effect; and its own weight can be reduced by about 3t, and 6.5m more can be transported. 3 About low temperature liquid.

Description

Technical Field

[0001] The present invention relates to the field of cryogenic hazardous chemical transportation equipment, and in particular to a cryogenic liquid transportation semitrailer. Background Art

[0002] In recent years, with the rapid development of the national economy, the number of cryogenic hazardous chemical transport vehicles has increased rapidly, exceeding 10,000. On the one hand, economic development has brought about an increase in national income and living standards. On the other hand, improving the technical parameters of cryogenic hazardous chemical transport vehicles also faces severe challenges. Previous carbon dioxide transport semi-trailers all adopted pearlescent sand insulation. The structure of the previous carbon dioxide transport semi-trailer included: a tank body, and the structure of the tank body included: an inner liner for storing liquefied carbon dioxide, a carbon steel plate shell with a thickness of 6 mm is arranged on the outside of the inner liner, and the interlayer between the shell and the inner liner is filled with pearlescent sand with thermal insulation properties; a traction seat is arranged on the front lower part of the tank body, and a traction pin for engaging with the tractor is arranged on the traction seat. The tractor can tow the tank body through the traction pin, and the tank body is A sub-beam is provided on the left and right sides of the rear lower part, and a walking mechanism is provided under the two sub-beams. The two sub-beams are fixed to the walking mechanism so that the walking mechanism can support the rear of the tank body. A support leg is also provided on the left and right sides of the front lower part of the tank body. The two support legs are used to support the front of the tank body when the tank body is not towed. An operation box is also provided on the tank body. All operation ends of the pipeline system on the tank body are located in the operation box. The traction seat, two crossbeams, two support legs, and the operation box are all fixed to the shell. In the past, the biggest disadvantage of carbon dioxide transport semi-trailers was that the weight of pearl sand and shell was too large. The maximum total mass requirement of hazardous chemical semi-trailers in my country does not exceed 40 tons. If the dead weight of the vehicle accounts for a large proportion, the corresponding medium loading mass will be reduced. In the fierce market competition environment, if the existing technology can be broken through to achieve the reduction of the curb weight and the improvement of the loading mass of carbon dioxide transport semi-trailers without reducing the safety performance and performance of the products, the competitiveness of the products can be greatly increased. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a low-temperature liquid transport semitrailer with excellent thermal insulation effect and light weight.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a cryogenic liquid transport semitrailer, comprising: a tank body, an inner tank for storing cryogenic liquid is arranged in the tank body, a traction seat is fixed on the front lower part of the tank body, a traction seat is arranged on the traction seat for clamping with the tractor, a sub-beam is fixed on the left and right sides of the rear lower part of the tank body, a walking mechanism is arranged under the two sub-beams, and the two sub-beams are also respectively fixed to the walking mechanism, so that the walking mechanism can support the rear of the tank body, and the front lower part of the tank body is fixed on the left and right sides of the rear lower part of the tank body. A support leg is also installed on the left and right sides of the tank, respectively. The two support legs are used to support the front of the tank when the tank is not towed. An operation box is also arranged on the tank, characterized in that: a polyurethane foam insulation layer is coated on the outer side of the inner tank, and an outer shell skin for protecting the polyurethane foam insulation layer is coated on the outer side of the polyurethane foam insulation layer; the structure of the traction seat also includes: a traction base plate and a cylindrical support frame, a traction pin is fixed to the traction base plate, the cylindrical support frame is located above the traction pin, the top of the cylindrical support frame is fixed to the inner tank, and the bottom of the cylindrical support frame is fixed to the traction base plate through an insulation structure, and the insulation structure includes: a flange fixed to the bottom end of the cylindrical support frame, a glass fiber reinforced plastic pad is arranged between the flange and the traction base plate, a locking bolt is penetrated in each flange hole and passes through the traction base plate and the glass fiber reinforced plastic pad from bottom to top in sequence, a locking nut located above the flange hole is threadedly connected to each locking bolt, and a locking nut is provided between each locking nut and the corresponding flange hole, which is used to separate the locking nut and the law. The fiberglass gasket of the flange is provided with an insulating ring which is sleeved on the outside of the locking bolt and is used to separate the locking bolt and the flange in each flange hole. After tightening the locking nuts on each locking bolt, the traction base plate can be fixed to the flange through the fiberglass gasket; the two sub-beams are hollow, and filling ports are provided on the cylinder wall of the cylindrical support frame and the side walls of the two sub-beams. The inner cavities of the cylindrical support frame and the two sub-beams are filled with polyurethane foam through their respective filling ports; the two legs and the operation box are fixed to the inner tank through the insulating support plate, and the structure of the insulating support plate includes: a fiberglass plywood and two steel plates. The fiberglass plywood is clamped between the two steel plates. The two steel plates and the fiberglass plywood are tightly fixed together by locking several bolts and nuts which pass through them in sequence; one steel plate on the insulating support plate is used to be fixed to the inner tank, and the other steel plate is used to be fixed to the legs or the operation box.

[0005] Furthermore, in the aforementioned cryogenic liquid transport semi-trailer, at least three hollow pillars arranged along the length direction of the sub-beams are provided on the lower part of the two sub-beams, the inner cavity of each hollow pillar is connected with the inner cavity of the corresponding sub-beam, and the two sub-beams are placed and fixed on the walking mechanism through the hollow pillars thereon.

[0006] Furthermore, in the aforementioned cryogenic liquid transport semi-trailer, the outer shell skin is a stainless steel plate with a thickness of 0.3 to 0.7 mm.

[0007] Furthermore, in the aforementioned low-temperature liquid transport semi-trailer, the thickness of the polyurethane foam insulation layer is 120 to 180 mm.

[0008] Furthermore, in the aforementioned cryogenic liquid transport semi-trailer, the thickness of the fiberglass plywood and the fiberglass pad are both 20 to 30 mm.

[0009] Furthermore, in the aforementioned cryogenic liquid transport semi-trailer, the fiberglass backing plate is an annular plate.

[0010] Furthermore, in the aforementioned cryogenic liquid transport semi-trailer, the insulation ring is a polytetrafluoroethylene ring.

[0011] The advantages of the present invention are as follows: the low-temperature liquid transport semi-trailer of the present invention has excellent insulation effect, which can achieve the insulation effect of using pearl sand; and its own weight can be reduced by about 3 tons, and compared with the low-temperature liquid transport semi-trailer insulated with pearl sand, it can transport 6.5m more 3 The low-temperature liquid of about 100% improves the transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a schematic structural diagram of a cryogenic liquid transport semitrailer.

[0013] Figure 2 for Figure 1 Schematic diagram of the structure of the AA section.

[0014] Figure 3 for Figure 1 The structural schematic diagram of the fifth wheel is shown in FIG.

[0015] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0016] Figure 5 for Figure 1 Schematic diagram of the structure of the BB section.

[0017] Figure 6 for Figure 1 The installation structure diagram of the operation box is shown in FIG.

[0018] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at D in the middle. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with specific embodiments and drawings.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, a cryogenic liquid transport semitrailer comprises: a tank body 1, in which an inner tank 11 for storing liquefied carbon dioxide is arranged, a traction seat 2 is fixed on the front lower part of the tank body 1, and a traction pin 21 for engaging with a tractor is arranged on the traction seat 2, and the tractor can tow the tank body 1 through the traction pin 21, and a sub-beam 3 is fixed on the left and right sides of the rear lower part of the tank body 1 respectively, and a walking mechanism 4 is arranged below the two sub-beams 3, and the two sub-beams 3 are also fixed to the walking mechanism 4 respectively, so that the walking mechanism 4 can support the rear part of the tank body 1, and a support leg 5 is also installed on the left and right sides of the front lower part of the tank body 1 respectively, and the two support legs 5 are used to support the front part of the tank body 1 when the tank body 1 is not towed, and an operation box 6 is also arranged on the tank body 1, and each operation end of the pipeline system on the tank body 1 is located in the operation box 6, and the operation box 6 plays a role in protecting the pipeline operation end. It is usually a valve for controlling the opening and closing of the pipeline; the outer side of the inner liner 11 is coated with a polyurethane foam insulation layer 12, and the mass of the polyurethane foam insulation layer 12 is very small, which can effectively reduce the weight of the semi-trailer itself; in this embodiment, the thickness of the polyurethane foam insulation layer 12 is 150mm, and the molding method of the polyurethane foam insulation layer 12 is: first, a plurality of polyurethane modules are foamed in a mold in advance, and then each polyurethane module is overlapped and pasted on the outer side of the inner liner, and then the polyurethane foam material is poured into the gap between each polyurethane module, so that each polyurethane module is connected to form an integrated polyurethane foam insulation layer 12, and finally the surface of the polyurethane foam insulation layer 12 is refined to make the surface of the polyurethane foam insulation layer 12 smooth; the outer side of the polyurethane foam insulation layer 12 is coated with an outer shell skin 13 for protecting the polyurethane foam insulation layer 12. In this embodiment, the outer shell skin 13 is 0.5mm thick stainless steel plate, the thickness of the outer skin 13 is very small, so the weight is very small, which can effectively reduce the weight of the semi-trailer itself; the structure of the traction seat 2 also includes: a traction base plate 22 and a cylindrical support frame 23, the traction pin 21 is fixed on the traction base plate 22, the cylindrical support frame 23 is located above the traction pin 21, the top of the cylindrical support frame 23 is fixed to the inner tank 11, and the bottom of the cylindrical support frame 23 is fixed to the traction base plate 22 through an insulating structure. The insulating structure makes it difficult for external heat to be conducted to the inner tank 11 through the cylindrical support frame 23. The insulating structure includes: a flange 24 fixed to the bottom end of the cylindrical support frame 23, and a flange 2 A glass fiber reinforced plastic pad 25 is arranged between the traction base plate 24 and the traction base plate 22. In this embodiment, the thickness of the glass fiber reinforced plastic pad 25 is 25 mm and it is an annular plate. Glass fiber reinforced plastic is a material with low thermal conductivity. A locking bolt 26 is inserted through each flange hole and passes through the traction base plate 22 and the glass fiber reinforced plastic pad 25 from bottom to top in sequence. A locking nut 27 located above the flange hole is threadedly connected to each locking bolt 26. A glass fiber reinforced plastic gasket 28 for separating the locking nut 27 and the flange 24 and sleeved on the locking bolt 26 is arranged between each locking nut 27 and the corresponding flange hole. Insulating rings 29 are embedded in the middle and are used to separate the locking bolts 26 and the flanges 24. In this embodiment, the insulating rings 29 are polytetrafluoroethylene rings. Polytetrafluoroethylene has a low thermal conductivity and is easy to process. After tightening the locking nuts 27 on each locking bolt 26, the traction base plate 22 can be fixed to the flange 24 through the glass fiber reinforced plastic pad 25. The two sub-beams 3 are hollow, and filling ports 31 are opened on the cylinder wall of the cylindrical support frame 23 and the side walls of the two sub-beams 3. The inner cavities of the cylindrical support frame 23 and the two sub-beams 3 are filled with polyurethane foam through their respective filling ports 31, which can effectively insulate The air in the inner cavity conducts heat; the two legs 5 and the operating box 6 are fixed to the inner liner 11 through an insulating support plate. The structure of the insulating support plate includes: a glass fiber reinforced plastic plywood 51 and two steel plates. In this embodiment, the two steel plates are an inner steel plate 522 and an outer steel plate 521. The thickness of the glass fiber reinforced plastic plywood 51 is 25 mm; the glass fiber reinforced plastic plywood 51 is clamped between the two steel plates, and the two steel plates and the glass fiber reinforced plastic plywood 51 are tightly fixed together by locking with several bolts and nuts that pass through them in sequence; the inner steel plate 522 on the insulating support plate is used to fix to the inner liner 11, and the outer steel plate 521 is used to fix to the legs 5 or the operating box 6. In this embodiment, the operating box 6 is fixed to the inner liner 11 through multiple insulating support plates. The insulating support plate can effectively reduce the introduction of external heat into the inner liner 11. .

[0021] like Figure 1As shown, in this embodiment, three hollow pillars 32 are arranged along the length direction of the sub-beams 3 on the lower parts of the two sub-beams 3, and the inner cavity of each hollow pillar 32 is connected with the inner cavity of the corresponding sub-beam 3. The two sub-beams 3 are placed and fixed on the traveling mechanism 4 through the hollow pillars 32 thereon. The provision of the hollow pillars 32 can effectively reduce the contact area between the sub-beam 3 and the traveling mechanism 4, thereby reducing the heat conduction area.

Claims

1. A cryogenic liquid transport semitrailer, comprising: The traction seat is fixed on the front lower part of the tank body, and the traction seat is provided with a traction pin for engaging with the traction vehicle. A sub-beam is fixed on the left and right sides of the rear lower part of the tank body, and a walking mechanism is provided under the two sub-beams, and the two sub-beams are also respectively fixed to the walking mechanism, so that the walking mechanism can support the rear of the tank body. A support leg is also installed on the left and right sides of the front lower part of the tank body, and the two support legs are used to support the front of the tank body when the tank body is not towed. An operation box is also provided on the tank body, characterized in that: a polyurethane foam insulation layer is coated on the outer side of the inner liner, and an outer shell skin for protecting the polyurethane foam insulation layer is coated on the outer side of the polyurethane foam insulation layer; the structure of the traction seat also includes: a traction base plate and a cylindrical support frame, the traction pin is fixed on the traction base plate, the cylindrical support frame is located above the traction pin, the top end of the cylindrical support frame is fixed to the inner liner, and the bottom end of the cylindrical support frame is connected to the traction base plate through an insulation structure The heat-insulating structure comprises: a flange fixed on the bottom end of the cylindrical support frame, a glass fiber reinforced plastic pad is arranged between the flange and the traction base plate, a locking bolt is inserted in each flange hole and passes through the traction base plate and the glass fiber reinforced plastic pad from bottom to top in sequence, a locking nut located above the flange hole is threadedly connected to each locking bolt, a glass fiber reinforced plastic gasket which is sleeved on the locking bolt and is used to separate the locking nut and the flange is arranged between each locking nut and the corresponding flange hole, an insulating ring which is sleeved on the outside of the locking bolt and is used to separate the locking bolt and the flange is embedded in each flange hole and is used to separate the locking bolt and the flange, and after tightening the locking nuts on each locking bolt, the traction base plate can be fixed to the flange through the glass fiber reinforced plastic pad; the two auxiliary beams are hollowly arranged, and filling ports are opened on the cylinder wall of the cylindrical support frame and the side walls of the two auxiliary beams, and the inner cavities of the cylindrical support frame and the two auxiliary beams are filled with polyurethane foam through their respective filling ports; the two legs and the operating box are fixed to the inner tank through the heat-insulating support plate, The structure of the insulation support plate includes: a fiberglass splint and two steel plates. The fiberglass splint is clamped between the two steel plates. The two steel plates and the fiberglass splint are tightly fixed together by locking them with several bolts and nuts that pass through them in sequence. One steel plate on the insulation support plate is used to be fixed to the inner tank, and the other steel plate is used to be fixed to the support leg or the operating box.

2. A cryogenic liquid transport semitrailer according to claim 1, characterized in that: At least three hollow pillars are arranged along the length direction of the sub-beams at the lower part of the two sub-beams, and the inner cavity of each hollow pillar is connected with the inner cavity of the corresponding sub-beam. The two sub-beams are placed and fixed on the walking mechanism through the hollow pillars thereon.

3. A cryogenic liquid transport semitrailer according to claim 1 or 2, characterized in that: The outer shell skin is a stainless steel plate with a thickness of 0.3 to 0.7 mm.

4. A cryogenic liquid transport semitrailer according to claim 1 or 2, characterized in that: The thickness of the polyurethane foam insulation layer is 120 to 180 mm.

5. A cryogenic liquid transport semitrailer according to claim 1 or 2, characterized in that: The thickness of the FRP plywood and FRP pad is 20 to 30 mm.

6. A cryogenic liquid transport semitrailer according to claim 1 or 2, characterized in that: The fiberglass pad is a ring-shaped plate.

7. A cryogenic liquid transport semitrailer according to claim 1 or 2, characterized in that: The thermal insulation ring is a polytetrafluoroethylene ring.

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