Stepped composite door plate of cold storage and heat preservation box

Abstract

The utility model discloses a step type composite door plate of a cold storage and heat preservation box, which comprises an outer skin, a heat preservation layer attached to one side of the outer skin and an inner skin attached to the other side of the heat preservation layer, and a door body connecting piece is arranged on one side edge of the heat preservation layer. The other three side edges, except the side edge provided with the door body connecting piece, of the heat preservation layer are each provided with a multi-stage step structure. The top end of the multi-stage step structure is attached to the inner skin, the bottom end of the multi-stage step structure is attached to the outer skin, and the multi-stage step structure is gradually lowered in the direction from the inner skin to the outer skin. According to the step type composite door plate of the refrigeration and heat preservation box, the step type composite door plate is matched with the air bag type sealing strip, the sealing performance of the composite door plate is guaranteed, the self weight of the door plate is reduced, the design requirement for light weight is met, the structure is simple, and therefore the manufacturing cost of the composite door plate can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal insulation devices, and particularly relates to a stepped composite door panel for a refrigerated thermal insulation box. Background Art

[0002] With the development of the logistics industry, the global demand for cold chain logistics has been increasing year by year. Most of the existing door panels of refrigerated thermal insulation boxes adopt an inclined plane type and are equipped with a toothed multi-layer rubber sealing strip. The structure of such a door panel and the sealing method of the sealing skin rely on the extrusion deformation of rubber to generate sealing performance. Since the extrusion deformation will cause an increase in friction, this type of door panel has disadvantages such as difficult opening and closing of the box door, large self-weight of the door panel, high manufacturing cost, complex processing technology, high technical difficulty, and weak door panel strength. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above problems existing in the prior art, and provide a stepped composite door panel for a refrigerated thermal insulation box. The stepped composite door panel is combined with an airbag type sealing strip, which not only ensures the sealing performance of the composite door body, but also reduces the self-weight of the door panel, meets the design requirements of lightweight, has a simple structure, and thus can effectively reduce the manufacturing cost of the composite door panel.

[0004] To achieve the above technical purpose and reach the above technical effect, the utility model is realized through the following technical solutions:

[0005] A stepped composite door panel for a refrigerated thermal insulation box includes an outer skin, a thermal insulation layer attached to one side of the outer skin, and an inner skin attached to the other side of the thermal insulation layer. A door body connecting piece is arranged on one of the side edges of the thermal insulation layer, and multi-level step structures are arranged on the other three side edges of the thermal insulation layer except the side edge where the door body connecting piece is arranged;

[0006] The top end of the multi-level step structure is attached to the inner skin, the bottom end of the multi-level step structure is attached to the outer skin, and the multi-level step structure gradually decreases from the inner skin to the outer skin direction;

[0007] Bending pieces are attached to the outside of the other three side edges of the thermal insulation layer except the side edge where the door body connecting piece is arranged, and both ends of the bending pieces are respectively attached to the inner skin and the outer skin;

[0008] One end of the bending piece is attached to the top end of the multi-level step structure on the thermal insulation layer, and the other end of the bending piece is attached to the step surface of the multi-level step structure;

[0009] A sealing connecting piece is attached to the outside of the bending piece, and a second sealing piece is arranged on the outside of the sealing connecting piece;

[0010] A third sealing piece is also arranged on one step surface of the multi-level step structure where the bending piece is attached.

[0011] Further, the door body connecting piece is L-shaped.

[0012] Further, one end of the door body connecting piece is attached to the outer skin, and a first seal is integrally formed at the other end of the door body connecting piece, and the other end of the first seal is attached to the inner skin.

[0013] Further, one end of the seal connecting piece is attached to the inner skin, and the other end of the seal connecting piece is attached to the bending piece.

[0014] Further, two clamping plates are integrally formed on the outer surface of the seal connecting piece, and a clamping groove is formed between the two clamping plates and the outer surface of the seal connecting piece;

[0015] Both ends of the second seal are buckled in the two clamping grooves.

[0016] Further, the second seal includes a cross beam and a first airbag integrally formed on the cross beam. The first airbag is a hollow structure, and a partition beam is integrally formed in the first airbag, and the other end of the partition beam is connected to the cross beam;

[0017] The partition beam divides the first airbag into two second airbags;

[0018] Both ends of the cross beam are connected to the seal connecting piece.

[0019] Further, the third seal includes a first U-shaped sealing strip and a second U-shaped sealing strip, and the closed ends of the first U-shaped sealing strip and the second U-shaped sealing strip are integrally formed into an H-shaped structure;

[0020] One end of the first U-shaped sealing strip is attached to the step surface of the multi-step structure, and the other end of the first U-shaped sealing strip is attached to the outer skin.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] 1. The present utility model provides a stepped composite door panel for a refrigerated insulation box. The stepped composite door panel is matched with an airbag-type sealing strip, which not only ensures the sealing performance of the composite door body, but also reduces the self-weight of the door panel, meets the design requirements of light weight, and has a simple structure, thereby effectively reducing the manufacturing cost of the composite door panel.

[0023] 2. In the present utility model, a bending member is provided. One end of the bending member is attached to the top of the multi-step structure on the thermal insulation layer, and the other end of the bending member is attached to the step surface of the multi-step structure. During the production and processing, the bending member can be pre-embedded on the inner skin. During the process of pressing and forming the outer skin, the thermal insulation layer, and the inner skin, the bending member is simultaneously pressed and formed so that the other end of the bending member is attached to the step surface of the multi-step structure.

[0024] 3. In the present utility model, a second seal is provided outside the sealing connector. The structure of the second seal can ensure the sealing performance of the multi-layer structure of the composite door panel.

[0025] 4. A stepped composite door panel for a refrigerated insulation box provided by the present utility model has a simple structure and is easy to manufacture. It meets the requirements of small-batch production and is more suitable for mass production. Moreover, the self-weight of the door panel is reduced, meeting the requirements of lightweight vehicle design. Due to the pre-embedded bending member inside, the strength of the door panel is improved. In addition, the manufacturing cost of this structure is greatly reduced, the amount of glue used is reduced, which conforms to the development trend of green production.

[0026] 5. In the present utility model, a multi-step structure is provided. In combination with the use of the second seal, the sealing performance during the use of the composite door panel is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0028] Figure 1 is the main structural view of the present utility model;

[0029] Figure 2 is the left structural view of the present utility model;

[0030] Figure 3 is the bottom structural view of the present utility model;

[0031] Figure 4 is the enlarged view of the structure at position B of the present utility model;

[0032] Figure 5 is the enlarged view of the structure at position A of the present utility model.

[0033] Among them, the reference numerals are: 1, outer skin; 2, thermal insulation layer; 3, inner skin; 7, door body connecting piece; 10, step structure; 8, seal one; 12, bending piece; 4, seal connecting piece; 5, seal two; 20, seal three; 41, clamping plate; 42, clamping groove; 52, airbag one; 53, partition beam; 54, airbag two; 201, U-shaped seal one; 202, U-shaped seal two. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0036] As Figures 1 to 3 shown, a stepped composite door panel for a refrigerated insulation box includes: an outer skin 1, a thermal insulation layer 2 attached to one side of the outer skin 1, and an inner skin 3 attached to the other side of the thermal insulation layer 2;

[0037] Among them, both the outer skin 1 and the inner skin 3 can be made of thermoplastic plates; the thermal insulation layer 2 is made of an XPS board;

[0038] A door body connecting piece 7 is arranged on one side edge of the thermal insulation layer 2, and the door body connecting piece 7 is used to connect with the door frame to realize the installation of the composite door panel;

[0039] On the thermal insulation layer 2, multi-level step structures 10 are arranged on the other three side edges except the side edge where the door body connecting piece 7 is arranged;

[0040] Among them, the top end of the multi-level step structure 10 is attached to the inner skin 3, the bottom end of the multi-level step structure 10 is attached to the outer skin 1, and the multi-level step structure 10 gradually decreases from the inner skin 3 to the outer skin 1 direction;

[0041] The door body connecting piece 7 is L-shaped; one end of the L-shaped door body connecting piece 7 can be pressed and adhered to the outer skin 1 by a laminator, and a first seal 8 is integrally formed at the other end of the door body connecting piece 7. The other end of the first seal 8 is pressed and adhered to the inner skin 3 by a laminator. The door body connecting piece 7 and the first seal 8 wrap the side edge where the composite door panel is connected to the door opening, further enhancing the sealing performance of the composite door body;

[0042] On the other three side edges of the insulation layer 2 except the side edge where the door body connecting piece 7 is provided, bending pieces 12 are attached. The two ends of the bending piece 12 are respectively attached to the inner skin 3 and the outer skin 1;

[0043] One end of the bending piece 12 is attached to the top of the multi-step structure 10 on the insulation layer 2, and the other end of the bending piece 12 is attached to the step surface of the multi-step structure 10; the material of the bending piece 12 can be made of steel or plastic-wood profiles with the same strength. By providing the bending piece 12, the strength of the composite door panel can be improved. Through actual production and testing, for the composite door panel with the bending piece 12 added, compared with the composite door panel without the bending piece 12, its door panel strength is increased by more than 35%;

[0044] A seal connecting piece 4 is attached to the outside of the bending piece 12, and a second seal 5 is provided on the outside of the seal connecting piece 4;

[0045] A third seal 20 is also provided on one step surface of the multi-step structure 10 where the bending piece 12 is attached;

[0046] Wherein, one end of the seal connecting piece 4 is attached to the inner skin 3, and the other end of the seal connecting piece 4 is attached to the bending piece 12;

[0047] Two clamping plates 41 are integrally formed on the outer surface of the seal connecting piece 4, and a clamping groove 42 is formed between the two clamping plates 41 and the outer surface of the seal connecting piece 4;

[0048] The two ends of the second seal 5 are buckled into the two clamping grooves 42;

[0049] The second seal 5 includes a cross beam 51 and an airbag one 52 integrally formed on the cross beam 51. The airbag one 52 is a hollow structure, and a partition beam 53 is integrally formed in the airbag one 52. The other end of the partition beam 53 is connected to the cross beam 51;

[0050] The partition beam 53 divides the airbag one 52 into two airbags two 54;

[0051] The two ends of the cross beam 51 are connected to the seal connecting piece 4;

[0052] Wherein, the two ends of the cross beam 51 are buckled into the two clamping grooves 42;

[0053] The seal three 20 includes a U-shaped seal one 201 and a U-shaped seal two 202. The closed ends of the U-shaped seal one 201 and the U-shaped seal two 202 are integrally formed into an H-shaped structure;

[0054] One end of the U-shaped seal one 201 is attached to the step surface of the multi-step structure 10, and the other end of the U-shaped seal one 201 is attached to the outer skin 1.

[0055] Among them, during the forming process of the composite door panel, the specific process is as follows:

[0056] S1: Use a milling machine to finely process the edges of the insulation layer 2 according to the design requirements, so as to form a multi-step structure 10 on three consecutive side edges of the insulation layer 2;

[0057] S2: To ensure strength, embed bending parts 12 on the other three side edges of the insulation layer 2 except the side edge where the door body connector 7 is provided;

[0058] S3: Place the outer skin 1 on the side where the bottom end of the multi-step structure 10 on the insulation layer 2 is located, and place the inner skin 3 on the side where the top end of the multi-step structure 10 on the insulation layer 2 is located. After fitting, place the seal two 5 at the other three side edges of the insulation layer 2 except the side edge where the door body connector 7 is provided, and enter the laminator for pressing and bonding to form in one step;

[0059] After pressing and forming, install the seal three 20 into the card slot 42 of the seal 5, and install the seal three 20 on the step surface of the multi-step structure 10. Among them, one end of the U-shaped seal one 201 is attached to the step surface of the multi-step structure 10, and the other end of the U-shaped seal one 201 is attached to the outer skin 1.

[0060] Actual detection shows that for the composite door panel provided by the present invention, compared with the traditional door panel sealed with a rubber seal, the self-weight of the door body is reduced by more than 40%.

[0061] The present invention provides a stepped composite door panel for a refrigerated insulation box. The stepped composite door panel is combined with an airbag-type seal, which not only ensures the sealing performance of the composite door body, but also reduces the self-weight of the door panel, meets the lightweight design requirements, and has a simple structure, thereby effectively reducing the manufacturing cost of the composite door panel.

[0062] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A stepped composite door panel for a refrigerated insulation box, characterized in that, It includes an outer skin (1), a thermal insulation layer (2) attached to one side of the outer skin (1), and an inner skin (3) attached to the other side of the thermal insulation layer (2). A door connector (7) is provided on one of the side edges of the thermal insulation layer (2), and multi-level step structures (10) are provided on the other three side edges of the thermal insulation layer (2) except the side edge where the door connector (7) is provided; The top end of the multi-level step structure (10) is attached to the inner skin (3), the bottom end of the multi-level step structure (10) is attached to the outer skin (1), and the multi-level step structure (10) gradually decreases from the inner skin (3) towards the outer skin (1); Bending members (12) are attached to the outside of the other three side edges of the thermal insulation layer (2) except the side edge where the door connector (7) is provided, and both ends of the bending members (12) are respectively attached to the inner skin (3) and the outer skin (1); One end of the bending member (12) is attached to the top end of the multi-level step structure (10) on the thermal insulation layer (2), and the other end of the bending member (12) is attached to the step surface of the multi-level step structure (10); A sealing connector (4) is attached to the outside of the bending member (12), and a second sealing member (5) is provided on the outside of the sealing connector (4); A third sealing member (20) is also provided on a step surface of the multi-level step structure (10) where the bending member (12) is attached; 2. The stepped composite door panel of a refrigerated insulation box according to claim 1, wherein: The door connector (7) is in an L shape; 3. A stepped composite door panel for a refrigerated insulation box according to claim 1, characterized in that: One end of the door connector (7) is attached to the outer skin (1), and a first sealing member (8) is integrally formed at the other end of the door connector (7), and the other end of the first sealing member (8) is attached to the inner skin (3); 4. A stepped composite door panel for a refrigerated insulation box according to claim 1, wherein: One end of the sealing connector (4) is attached to the inner skin (3), and the other end of the sealing connector (4) is attached to the bending member (12); 5. A stepped composite door panel for a refrigerated insulation box according to claim 1, characterized in that: Two clamping plates (41) are integrally formed on the outer surface of the sealing connector (4), and a clamping groove (42) is formed between the two clamping plates (41) and the outer surface of the sealing connector (4); Both ends of the second sealing member (5) are buckled into the two clamping grooves (42); 6. A stepped composite door panel for a refrigerated insulation box according to claim 1, characterized in that: The second sealing member (5) includes a cross beam (51) and an airbag one (52) integrally formed on the cross beam (51). The airbag one (52) is a hollow structure, and a partition beam (53) is integrally formed in the airbag one (52), and the other end of the partition beam (53) is connected to the cross beam (51); The partition beam (53) divides the airbag one (52) into two airbags two (54); Both ends of the cross beam (51) are connected to the sealing connector (4); 7. A stepped composite door panel for a refrigerated insulation box according to claim 1, characterized in that: The third sealing member (20) includes a U-shaped sealing strip one (201) and a U-shaped sealing strip two (202), and the closed ends of the U-shaped sealing strip one (201) and the U-shaped sealing strip two (202) are integrally formed into an H-shaped structure; One end of the U-shaped sealing strip one (201) is attached to the step surface of the multi-level step structure (10), and the other end of the U-shaped sealing strip one (201) is attached to the outer skin (1);

Images