A refrigerated compartment structure with XPS core material and its manufacturing process

Abstract

The present invention belongs to the field of refrigerated compartments, specifically, a refrigerated compartment structure of XPS core material and its manufacturing process, the refrigerated compartment structure of the XPS core material includes a bottom plate, side plates, a top plate, a front plate and a rear door plate, the two sides of the top of the bottom plate are provided with side plates, the top of the side plates is provided with a top plate, the front ends of the bottom plate, the side plates and the top plate are provided with a front plate, and the rear ends of the bottom plate, the side plates and the top plate are provided with a rear door plate, the present invention forms a vertical and horizontal "suspended integral woven metal" skeleton pre-embedded structure by arranging C-shaped steel and U-shaped roll-pressed skeleton at the corners of the compartment bottom plate, left and right side plates, front plate, rear door plate and top plate, this structural method not only greatly enhances the structural strength of the plate itself, but also greatly enhances the riveting connection strength between the plates when the compartment is assembled. Compared with the traditional XPS refrigerated compartment plate adopting the all-wood square frame structure and the metal rectangular tube pre-embedded welding process, the structural strength is higher and the dead weight is lighter by more than 15%.

Description

Technical Field

[0001] The invention belongs to the field of refrigerated compartments, in particular to a refrigerated compartment structure of an XPS core material and a manufacturing process thereof. Background Art

[0002] At present, the mainstream domestic XPS core refrigeration compartment structure and its manufacturing process almost all adopt the structure of full wooden square frame filled with XPS foam core material or the structural process of slotting and filling square and rectangular tube frame welding on XPS foam board, and then adopt the "sandwich" bonding composite process to make panels. The compartment assembly adopts the compartment assembly process of structural adhesive bonding and wood screw connection and the compartment assembly process of pre-embedded square and rectangular tube frame welding.

[0003] Disadvantages of traditional XPS core refrigerated compartments:

[0004] First, the traditional XPS refrigerated box production process uses a full-wood square frame structure and pre-embeds iron plates on the edge of the board and uses screws to connect the box when assembling it, or uses a structural process of slotting and filling square tube frames on XPS foam boards and welding. Not only is the box structure strength and thermal insulation performance poor, and the box is heavy, but the full-wood square frame structure or thin-walled square tube frame structure has poor corrosion resistance, which greatly affects the service life of the box;

[0005] Secondly, the production process of traditional XPS refrigerated compartment panels and compartment assembly is too complicated. The use of more wood and embedded steel plates is heavy and will produce too many cold bridges, which will have a great impact on the insulation performance of the entire compartment, making the air tightness and insulation performance of the entire compartment relatively poor. The insulation time (the time it takes to heat up from the ambient temperature of 30°C to the temperature of 0°C at -20°C) is generally only about 75 to 85 minutes.

[0006] Finally, the weight of the car body using this plate structure technology and car body assembly technology is relatively heavy, generally around 900kg to 1000kg.

[0007] In view of this, the present invention introduces a refrigerated compartment structure of XPS core material and a manufacturing process thereof. Summary of the invention

[0008] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0009] The technical solution adopted by the present invention to solve the technical problem is: the refrigerated compartment structure of the XPS core material of the present invention comprises a bottom plate, a side plate, a top plate, a front plate and a rear door plate, the two sides of the top of the bottom plate are provided with side plates, the top plate is provided with a top plate on the top of the side plate, the front end of the bottom plate, the side plate and the top plate is provided with a front plate, and the rear end of the bottom plate, the side plate and the top plate is provided with a rear door plate;

[0010] The side panels, top panels and front panels are composed of skin panels II, C-shaped rolled metal strips, XPS core panels and U-shaped rolled frames. The inner and outer sides of the side panels, top panels and front panels are all provided with skin panels II, and the side panels, top panels and front panels are embedded with XPS core panels. Pouring cavities are provided between adjacent XPS core panels, and U-shaped rolled frames are provided in the pouring cavities. C-shaped rolled metal strips are inlaid on the upper and lower surfaces of the XPS core panels, and the C-shaped rolled metal strips inlaid on the upper and lower surfaces are welded to the U-shaped rolled frame to form a pre-embedded structure of a suspended integral woven metal frame.

[0011] Preferably, the base frame is composed of a steel-plastic composite reinforced I-beam, plywood, a skin board and an H-shaped composite frame profile. The top of the base frame is provided with plywood and a skin board. The left and right sides and the front end of the base frame are provided with H-shaped composite frame profiles. A steel-plastic composite reinforced I-beam is arranged horizontally in the middle of the H-shaped composite frame profiles on the left and right sides. The steel-plastic composite reinforced I-beam and the H-shaped composite frame profile are connected by bolts to form an overall frame structure.

[0012] Preferably, the lower edge of the U-shaped rolled frame of the left and right side panels is connected to the corresponding position of the h-shaped composite frame profile on the side of the base plate by punching, tapping and bolting, and the lower edge of the U-shaped rolled frame of the front panel is connected to the corresponding position of the h-shaped composite frame profile at the front end of the base plate by punching, tapping and bolting.

[0013] Preferably, the side panels, top panel, front panel and rear door panel are assembled by riveting aluminum alloy profiles with sealant grooves inside and outside the panels, and the combined positions of the panels form a sealed cavity structure.

[0014] A manufacturing process of a refrigerated compartment of an XPS core material comprises the following steps:

[0015] S1. A second skin sheet is provided inside and outside the left and right side panels, the top panel and the front panel of the compartment. A U-shaped roll-pressed frame is provided between adjacent XPS core sheets. A C-shaped roll-pressed metal strip is embedded in the upper and lower surfaces of the XPS core sheet after slotting and milling, and is welded and connected with the U-shaped roll-pressed frame to form a perfusion cavity of a suspended metal frame. A polyurethane foam material is perfused into the perfusion cavity to fill it. After filling, an integral XPS core sheet of the compartment sheet is formed. The second skin sheet and the integral XPS core sheet are compounded by heating, pressurizing and bonding after glue spraying to form an integral sheet structure.

[0016] S2. The frame of the box floor is made of polymer pultruded profiles to make a combination of frame and beams, and XPS sheets are filled in the frame of the box floor, and then the inner and outer skin sheets are bonded together by heating and pressurizing after being sprayed with glue to form the box floor;

[0017] S3. The left and right side panels of the box body, the lower side of the front panel and the frame of the bottom panel are punched and tapped at the corresponding positions of the frame, and then bolted. The left and right side panels of the box body, the lower side of the front panel and the inner side of the bottom panel are riveted and connected with aluminum alloy profiles with sealant, and a cavity structure with internal and external sealing is formed at the combined position of the left and right side panels of the box body, the lower side of the front panel and the bottom panel;

[0018] S4. The left and right side panels, top panel, front panel and rear door panel of the vehicle body are assembled by riveting the aluminum alloy profiles with sealant grooves inside and outside the panels, and forming a sealed cavity structure at the assembly position of each panel;

[0019] S5. Perform foaming filling and bonding in the cavity structure at each panel assembly position.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The XPS core material refrigerated compartment structure and its manufacturing process described in the present invention, by arranging C-shaped steel and U-shaped roll-pressed skeletons at the corners of the compartment bottom plate, left and right side plates, front plate, rear door plate, and top plate to form a vertical and horizontal "suspended integral woven metal" skeleton pre-embedded structure, this structural method not only greatly enhances the structural strength of the plate itself, but also greatly enhances the riveting connection strength between the plates when the compartment is assembled. Compared with the traditional XPS refrigerated compartment plate using a full wooden square frame structure and metal rectangular tube pre-embedded welding process, the structural strength is higher and the dead weight is more than 15% lighter.

[0022] 2. The XPS core material refrigerated compartment structure and its manufacturing process described in the present invention, through the sealed cavity structure formed by the corner combination position of the compartment bottom plate, left and right side plates, front plate, rear door plate, and top plate, not only enhances the structural strength of the entire compartment, but also realizes the closed loop of the insulation core material between each plate, so that the air tightness of the compartment is greatly improved and the thermal conductivity is greatly reduced. Compared with the traditional XPS refrigerated compartment, the air tightness of the entire compartment is improved by 200%, and the insulation performance is improved by more than 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a structural diagram of the compartment in the present invention;

[0025] Figure 2 It is a front view structural cross-sectional view of the box body in the present invention;

[0026] Figure 3 The present invention Figure 2 The enlarged structural diagram at A in the middle;

[0027] Figure 4 The present invention Figure 2The structure diagram at B is enlarged;

[0028] Figure 5 It is a cross-sectional view of the side plate, top plate and front plate structure of the present invention;

[0029] Figure 6 is a cross-sectional view of the bottom plate structure in the present invention;

[0030] Figure 7 It is a box frame structure diagram in the present invention.

[0031] In the figure: 1. bottom plate; 101. steel-plastic composite reinforced I-shaped crossbeam; 102. plywood; 103. skin sheet material one; 104. H-shaped composite frame profile; 2. side plate; 201. skin sheet material two; 202. C-shaped roll-formed metal strip; 203. XPS core sheet material; 204. U-shaped roll-formed skeleton; 205. injection cavity; 3. top plate; 4. front plate; 5. rear door plate. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figures 1 to 7 As shown, a refrigerated compartment structure of an XPS core material according to an embodiment of the present invention comprises a bottom plate 1, a side plate 2, a top plate 3, a front plate 4 and a rear door plate 5, side plates 2 are arranged on both sides of the top of the bottom plate 1, the top plate 3 is arranged on the top of the side plate 2, the front end of the bottom plate 1, the side plate 2 and the top plate 3 is arranged with the front plate 4, and the rear end of the bottom plate 1, the side plate 2 and the top plate 3 is arranged with the rear door plate 5;

[0034] The side panels 2, top panels 3 and front panels 4 are composed of skin panels 201, C-shaped rolled metal strips 202, XPS core panels 203 and U-shaped rolled skeletons 204. The inner and outer sides of the side panels 2, top panels 3 and front panels 4 are all provided with skin panels 201. The side panels 2, top panels 3 and front panels 4 are embedded with XPS core panels 203. Pouring cavities 205 are provided between adjacent XPS core panels 203. U-shaped rolled skeletons 204 are provided in the pouring cavities 205. C-shaped rolled metal strips 202 are inlaid on the upper and lower surfaces of the XPS core panels 203. The C-shaped rolled metal strips 202 inlaid on the upper and lower surfaces are welded to the U-shaped rolled skeletons 204 to form a pre-embedded structure of a suspended integral woven metal frame.

[0035] like Figure 6As shown, the bottom plate 1 frame is composed of a steel-plastic composite reinforced I-shaped cross beam 101, a plywood 102, a skin plate 103 and an H-shaped composite frame profile 104. The top of the bottom plate 1 frame is provided with a plywood 102 and a skin plate 103. The left and right sides and the front end of the bottom plate 1 frame are provided with an H-shaped composite frame profile 104. The steel-plastic composite reinforced I-shaped cross beam 101 is arranged horizontally between the H-shaped composite frame profiles 104 on the left and right sides. The steel-plastic composite reinforced I-shaped cross beam 101 and the H-shaped composite frame profile 104 are provided with a steel-plastic composite reinforced I-shaped cross beam 101. 4 The overall frame structure is formed by bolt connection, and then the XPS core material is filled, which not only realizes the higher lightweight, high strength and corrosion resistance of the box bottom plate 1, but also greatly improves the air tightness and thermal insulation performance of the box. The thermal insulation performance of the whole box can reach 110 minutes, and the time for the temperature inside the box to rise from 20° to 0° at an ambient temperature of 30°; and the simpler box structure can reduce the weight of the box, indirectly reduce the loss of fuel or electricity of the refrigerated truck, reduce the transportation cost of customers, and also reduce the production cost.

[0036] The lower side of the U-shaped rolled skeleton 204 of the left and right side panels 2 is connected to the corresponding position of the h-shaped composite frame profile 104 on the side of the base plate 1 by punching, tapping and bolting. The lower side of the U-shaped rolled skeleton 204 of the front panel 4 is connected to the corresponding position of the h-shaped composite frame profile 104 at the front end of the base plate 1 by punching, tapping and bolting.

[0037] The side panels 2, top panel 3, front panel 4 and rear door panel 5 are assembled by riveting aluminum alloy profiles with sealant grooves inside and outside the panels, and the combined positions of the panels form a sealed cavity structure.

[0038] A manufacturing process of a refrigerated compartment of an XPS core material comprises the following steps:

[0039] S1. A second skin sheet 201 is arranged inside and outside the left and right side panels 2, the top panel 3 and the front panel 4 of the compartment, a U-shaped roll-pressed frame 204 is arranged between adjacent XPS core sheets 203, a C-shaped roll-pressed metal strip 202 is embedded in the upper and lower surfaces of the XPS core sheet 203 after slotting and milling, and is welded and connected with the U-shaped roll-pressed frame 204 to form a perfusion cavity 205 of a suspended metal frame, and a polyurethane foam material is perfused into the perfusion cavity 205 for filling, and after filling, an integral XPS core sheet 203 of the compartment sheet is formed, and the second skin sheet 201 and the integral XPS core sheet 203 are compounded by heating, pressurizing and bonding after glue spraying to form an integral sheet structure;

[0040] S2, the frame of the box bottom plate 1 is made of a combination structure of a frame and a crossbeam made of a polymer pultruded profile, and the XPS sheet is filled in the frame of the box bottom plate 1, and then the inner and outer skin sheets 103 are bonded together by heating and pressurizing after being sprayed with glue to form the box bottom plate 1;

[0041] S3, the left and right side panels 2 of the box body, the lower side of the front panel 4 and the frame of the bottom panel 1 are punched and tapped at the corresponding positions, and then bolted. The left and right side panels 2 of the box body, the lower side of the front panel 4 and the inner side of the bottom panel 1 are riveted and connected with aluminum alloy profiles with sealant, and a cavity structure sealed inside and outside is formed at the combined position of the left and right side panels 2 of the box body, the lower side of the front panel 4 and the bottom panel 1;

[0042] S4, the left and right side panels 2, the top panel 3, the front panel 4 and the rear door panel 5 of the compartment body are assembled by riveting the aluminum alloy profiles with sealing adhesive grooves inside and outside the panels, and forming a sealed cavity structure at the assembly position of each panel;

[0043] S5. Perform foaming filling and bonding in the cavity structure at each panel assembly position.

[0044] It should be noted here that

[0045] First, C-shaped steel and U-shaped roll-pressed skeleton 204 are arranged at the corners of the compartment bottom plate 1, side plate 2, top plate 3, front plate 4 and rear door plate 5 to form a vertical and horizontal "suspended integral woven metal" skeleton pre-embedded structure. This structural method not only greatly enhances the structural strength of the plate itself, but also greatly enhances the riveting connection strength between the plates when the compartment is assembled. Compared with the traditional XPS refrigerated compartment plate that adopts the full wooden square frame structure and metal rectangular tube pre-embedded welding process, the structural strength is higher and the dead weight is more than 15% lighter;

[0046] Secondly, the sealed cavity structure formed by the corner combination of the compartment bottom plate 1, side plate 2, top plate 3, front plate 4 and rear door plate 5, through the injection foam filling and bonding process, not only enhances the structural strength of the entire compartment, but also realizes the closed loop of the insulation core material between the panels, which greatly improves the air tightness of the compartment and greatly reduces the thermal conductivity. Compared with the traditional XPS refrigerated compartment, the air tightness of the entire compartment is improved by 200%, and the insulation performance is improved by more than 30%;

[0047] Finally, the frame of the refrigerated compartment floor 1 is provided with plywood 102, the load-bearing surface is paved with a skin sheet 103, and the steel-plastic composite reinforced I-shaped beam 101 and the h-shaped composite frame profile 104 made of polymer profiles are bolted to form a frame combination of the bottom plate 1, and then the XPS core sheet 203 is filled, so as to achieve higher lightweight, high strength and corrosion resistance of the compartment floor 1. It also greatly improves the air tightness and thermal insulation performance of the compartment. The thermal insulation performance of the whole compartment can reach 110 minutes, and the time for the temperature inside the compartment to rise from 20° to 0° at an ambient temperature of 30°. The simpler compartment structure can reduce the weight of the compartment, indirectly reduce the fuel / power loss of the refrigerated truck, reduce the transportation cost of customers, and also reduce the production cost.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A refrigerated compartment structure with XPS core material, characterized in that: The refrigerated compartment structure of the XPS core material comprises a bottom plate (1), side plates (2), a top plate (3), a front plate (4) and a rear door plate (5); the side plates (2) are arranged on both sides of the top of the bottom plate (1); the top plate (3) is arranged on the top of the side plates (2); the front end of the bottom plate (1), the side plates (2) and the top plate (3) is arranged with the front plate (4); and the rear end of the bottom plate (1), the side plates (2) and the top plate (3) is arranged with the rear door plate (5); The side panels (2), top panels (3) and front panels (4) are composed of a second skin panel (201), a C-shaped roll-pressed metal strip (202), an XPS core panel (203) and a U-shaped roll-pressed frame (204); the inner and outer sides of the side panels (2), top panels (3) and front panels (4) are all provided with a second skin panel (201); the side panels (2), top panels (3) and front panels (4) are embedded with an XPS core panel (203); a perfusion cavity (205) is provided between adjacent XPS core panels (203); a U-shaped roll-pressed frame (204) is provided in the perfusion cavity (205); the upper and lower surfaces of the XPS core panel (203) are inlaid with a C-shaped roll-pressed metal strip (202); the C-shaped roll-pressed metal strip (202) inlaid on the upper and lower surfaces are welded to the U-shaped roll-pressed frame (204) to form a pre-embedded structure of a suspended integral woven metal frame.

2. The refrigerated compartment structure of an XPS core material according to claim 1, characterized in that: The bottom plate (1) frame is composed of a steel-plastic composite reinforced I-shaped cross beam (101), a plywood (102), a skin plate (103) and an H-shaped composite frame profile (104). The top of the bottom plate (1) frame is provided with the plywood (102) and the skin plate (103). The left and right sides and the front end of the bottom plate (1) frame are provided with H-shaped composite frame profiles (104). The steel-plastic composite reinforced I-shaped cross beam (101) is arranged transversely between the H-shaped composite frame profiles (104) on the left and right sides. The steel-plastic composite reinforced I-shaped cross beam (101) and the H-shaped composite frame profile (104) are connected by bolts to form an overall frame structure.

3. The refrigerated compartment structure of the XPS core material according to claim 2, characterized in that: The lower sides of the U-shaped roll-formed frames (204) of the left and right side plates (2) are connected to the corresponding positions of the H-shaped composite frame profile (104) on the side of the bottom plate (1) by punching, tapping and bolting, and the lower sides of the U-shaped roll-formed frames (204) of the front plate (4) are connected to the corresponding positions of the H-shaped composite frame profile (104) at the front end of the bottom plate (1) by punching, tapping and bolting.

4. The refrigerated compartment structure of the XPS core material according to claim 3, characterized in that: The side panels (2), top panel (3), front panel (4) and rear door panel (5) are assembled by riveting the panels inside and outside with aluminum alloy profiles with sealing adhesive grooves, and the assembled positions of the panels form a sealed cavity structure.

5. A manufacturing process for a refrigerated compartment of XPS core material, characterized in that: It is used to prepare a refrigerated compartment structure of the XPS core material according to any one of claims 1 to 4, and the manufacturing process comprises the following steps: S1. A second skin sheet (201) is provided inside and outside the left and right side panels (2), the top panel (3) and the front panel (4) of the compartment body. A U-shaped roll-pressed frame (204) is provided between adjacent XPS core panels (203). A C-shaped roll-pressed metal strip (202) is embedded in the upper and lower surfaces of the XPS core panel (203) after slotting and milling, and is welded to the U-shaped roll-pressed frame (204) to form a perfusion cavity (205) of a suspended metal frame. A polyurethane foam material is poured into the perfusion cavity (205) for filling. After filling, an integral XPS core panel (203) of the compartment panel is formed. The second skin sheet (201) and the integral XPS core panel (203) are bonded together by heating and pressurizing after being coated with glue to form an integral panel structure. S2, the frame of the box bottom plate (1) is made of a polymer pultruded profile to form a combined structure of a frame and a crossbeam, and the frame of the box bottom plate (1) is filled with an XPS sheet, which is then bonded with the inner and outer skin sheets (103) by heating, pressurizing and gluing to form the box bottom plate (1); S3, the left and right side panels (2) and the lower side of the front panel (4) of the box body are punched and tapped at the corresponding positions of the frame of the frame of the bottom panel (1), and then bolted together. The left and right side panels (2) and the lower side of the front panel (4) of the box body are riveted together with the inner side of the bottom panel (1) using an aluminum alloy profile with a sealant, and a cavity structure sealed inside and outside is formed at the combined position of the left and right side panels (2) and the lower side of the front panel (4) of the box body and the bottom panel (1); S4, the left and right side panels (2), the top panel (3), the front panel (4) and the rear door panel (5) of the compartment body are assembled by riveting the panels inside and outside with aluminum alloy profiles with sealing adhesive grooves and riveting them with sealing adhesive, so as to form a sealed cavity structure at the assembly position of each panel; S5. Perform foaming filling and bonding in the cavity structure at each panel assembly position.

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