CN108068590B - Thermal insulation door plate, refrigeration transport equipment and manufacturing method - Google Patents

Abstract

The invention discloses a heat-insulating door plate, refrigeration transportation equipment and a manufacturing method. The refrigerated transportation equipment includes the box, and the heat preservation door plant sets up on the box, and the heat preservation door plant includes outer door plant, interior door plant and buckle, and the buckle sets up around outer door plant and interior door plant, and connects outer door plant and interior door plant to form closed cavity, wherein makes the heat preservation door plant according to following step, carries out the foaming to closed cavity and handles, in order to form the heat preservation with outer door plant, interior door plant and buckle closely laminating. According to the heat-insulating door plate, an advanced heat-insulating box foaming technology is adopted, the operation is convenient, the space among the inner door plate, the outer door plate, the buckle plate and the heat-insulating layer is completely filled, the strength of the heat-insulating door plate adopting integral foaming is higher than that of a common door plate, the heat-insulating effect of the door plate is improved, and the door plate structure is prevented from being damaged by water inflow. Meanwhile, the working environment is greatly improved by adopting the integral foaming technology, and the potential safety hazard is reduced.

Description

Insulated door panel, refrigerated transportation equipment and manufacturing method

Technical Field

The present invention relates to the technical field of refrigerated transportation, and in particular to a thermal insulation door panel, refrigerated transportation equipment and a manufacturing method.

Background technique

At present, the door panel structure of refrigerated trucks mainly involves installing edging and door seam tape around the door panels after the insulation door panels are manufactured, thereby achieving the assembly of the door panels and the sealing requirements of the refrigerated trucks.

There are two main structures for the door panels of refrigerated trucks. One is to use structural glue between the inner door panel, the outer door panel and the insulation layer to bond the inner door panel, the outer door panel and the insulation layer, and use the negative pressure vacuum method to maintain pressure and dry the door panel; then install the edge and door seam strips around the door panel to complete the assembly of the door panel and the sealing requirements of the refrigerated truck. This door panel structure is relatively simple and has low requirements for equipment. It is widely used in the production of refrigerated truck door panels. However, its disadvantage is that due to the use of structural glue to bond the door panel, the edge of the door panel and the insulation layer cannot be completely fitted, resulting in a gap between the edge of the door panel and the insulation layer, affecting the insulation effect of the entire door panel. At the same time, there will be gaps between the interfaces of the edge during assembly. After a period of use, water will penetrate into the insulation layer, causing the door panel to delaminate, reducing the insulation effect and the strength of the door panel.

The second method is to use resin glue and fiberglass felt to form the edge of the door panel around the insulation layer of the door panel during the production process, and to pressurize and dry the door panel; then install door seam strips around the door panel to achieve the assembly of the door panel and the sealing requirements of the refrigerated truck. This structure can effectively avoid the defects of the previous door panel, but during its production process, chemical solvents need to be added to the resin glue for catalysis, which has a strong odor and is toxic. Fiberglass is also a non-edible product. The on-site operating environment is poor and there are safety hazards. After the door panel is completed, there are bubbles and unevenness between the inner and outer door panels, and the surface needs to be repaired and sprayed with glue. The production efficiency is too low and there are safety hazards.

Therefore, it is necessary to provide a thermal insulation door panel, refrigerated transportation equipment and a manufacturing method to at least partially solve the above problems.

Summary of the invention

A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

In order to at least partially solve the above problems, the present invention discloses a thermal insulation door panel for refrigerated transportation equipment, wherein the refrigerated transportation equipment comprises a box body, and the thermal insulation door panel is arranged on the box body, characterized in that the thermal insulation door panel comprises:

External door panels;

Inner door panels;

A gusset plate, which is arranged around the outer door plate and the inner door plate and connects the outer door plate and the inner door plate to form a closed cavity.

The thermal insulation door panel is manufactured according to the following steps, and the closed cavity is foamed to form a thermal insulation layer that is tightly fitted with the outer door panel, the inner door panel and the buckle plate.

Optionally, the inner door panel has a first bending portion facing the outside of the box body, the outer door panel has a second bending portion facing the inside of the box body, the buckle plate has two openings arranged opposite to each other, and the second bending portion and the first bending portion are respectively inserted into the two openings.

Optionally, the thermal insulation door panel further comprises a door panel frame, wherein the door panel frame is arranged between the thermal insulation layer and the outer door panel, and the gusset plate is arranged around the door panel frame.

Optionally, the door panel frame has a third bent portion facing the inner side of the box body, and the second bent portion and the third bent portion are inserted into the same opening.

Optionally, the thermal insulation door panel further includes a door seal assembly, wherein the door seal assembly includes a door seal and a connector, and the door seal is connected to the buckle plate via the connector.

Optionally, the door seal assembly further includes a door seal pressure plate, and the door seal pressure plate and the door seal are connected together with the buckle plate via the connecting piece.

Optionally, the door seal includes a first door seal and a second door seal, the door seal pressure plate includes a first door seal pressure plate and a second door seal pressure plate, and the connecting piece includes a first connecting piece and a second connecting piece.

The first door seal and the first door seal pressure plate are connected to the inner door panel and the buckle plate through the first connecting member, and the second door seal and the second door seal pressure plate are connected to the outer door panel and the buckle plate through the second connecting member.

The present invention also provides a refrigerated transportation equipment, characterized in that the refrigerated transportation equipment includes the above-mentioned thermal insulation door panel.

Optionally, the refrigerated transport equipment is a refrigerated truck or a refrigerated box.

The present invention also provides a method for manufacturing the above-mentioned thermal insulation door panel, characterized in that the manufacturing method comprises:

Step 1: Arrange the gusset plate around the outer door plate and the inner door plate, and connect the outer door plate and the inner door plate to form a closed cavity;

Step 2: Foaming the closed cavity to form a heat-insulating layer that is tightly fitted with the outer door panel, the inner door panel and the gusset plate.

Optionally, the step one includes:

Step 3: Bending the inner door panel and the outer door panel;

Step 4: Openings are respectively formed on two opposite side walls of the gusset plate;

Step 5: Insert the first bent portion of the inner door panel after the bending process into the opening on one side of the buckle plate, and insert the second bent portion of the outer door panel after the bending process into the opening on the other side of the buckle plate to form a closed cavity.

Optionally, the thermal insulation door panel further includes a door panel frame, and the step one further includes:

Step 6: Bending the door panel frame;

Step seven: Combine the bent door panel frame and the bent outer door panel so that the second bent portion of the outer door panel and the third bent portion of the door panel frame are inserted into the opening on the other side of the buckle plate.

Optionally, the thermal insulation door panel further includes a door sealing assembly, and the manufacturing method further includes:

Step eight: Connect the foamed buckle plate, the outer door panel, the inner door panel and the door panel frame to the door sealing assembly.

Based on the above technical solution, the present invention has the following beneficial effects compared with the prior art:

The thermal insulation door panel of the present invention adopts advanced thermal insulation box foaming technology, is easy to operate, and the inner door panel, outer door panel, gusset plate and thermal insulation layer are completely filled. The strength of the thermal insulation door panel using integral foaming is higher than that of ordinary door panels, and the thermal insulation effect of the door panel is increased to prevent water from entering and damaging the door panel structure. At the same time, the use of integral foaming technology also greatly improves the working environment and reduces safety hazards.

BRIEF DESCRIPTION OF THE DRAWINGS

The following drawings of embodiments of the present invention are hereby incorporated as part of the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions are used to explain the principles of the present invention. In the drawings,

FIG1 is a front view of a door for refrigerated transport equipment according to the present invention;

Fig. 2 is a cross-sectional view along line A-A in Fig. 1;

Fig. 3 is a cross-sectional view taken along line B-B in Fig. 1; and

FIG. 4 is a partial enlarged view of the K portion in FIG. 1 .

Description of reference numerals:

100: box door; 110: thermal insulation door panel;

111: Inner door panel; 112: Outer door panel;

113: insulation layer; 114: gusset plate;

115: door panel frame; 116: first bending portion;

117: second bending portion; 118: third bending portion;

119: first side wall; 120: second side wall;

121: first opening; 122: second opening;

130: door seal assembly; 131: first door seal;

132: second door seal; 133: first door seal pressure plate;

134: second door sealing plate; 135: first connecting member;

136: second connecting member; 190: hinge device.

Detailed ways

In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

In order to fully understand the embodiments of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.

Fig. 1 is a front view of a box door for refrigerated transport equipment according to the present invention, Fig. 2 is a cross-sectional view along line A-A in Fig. 1, Fig. 3 is a cross-sectional view along line B-B in Fig. 1, and Fig. 4 is a partial enlarged view of portion K in Fig. 1.

The present invention provides a refrigerated transport equipment, which can be a refrigerated truck or a refrigerated box. This embodiment takes a refrigerated truck as an example, and the refrigerated truck includes a box body, and frozen or fresh goods can be placed in the box body. Therefore, each wall panel of the box body is made of a heat-insulating material, and the door panel of the box door 100 that opens the box body is a heat-insulating door panel. The structure of the box door 100 shown in FIG. 1 is a double-door structure, which includes two heat-insulating door panels 110 adjacently arranged in the horizontal direction. The two heat-insulating door panels 110 have the same structure, and one of the heat-insulating door panels 110 is now taken as an example for description.

The thermal insulation door panel 110 includes an inner door panel 111, an outer door panel 112, an insulation layer 113, a gusset plate 114 and a door panel frame 115. The outer door panel 112 and the inner door panel 111 can be connected to a hinge device 190 provided on the box body to facilitate opening and closing of the thermal insulation door panel 110. As shown in FIGS. 2 and 3 , the edges of the inner door panel 111 are bent toward the outside of the box body to form a first bending portion 116, and the first bending portion 116 surrounds the inner door panel 111. The outer door panel 112 and the door panel frame 115 are arranged relative to the inner door panel 111. The edges of the outer door panel 112 are also bent toward the inside of the box body to form a second bending portion 117, and the second bending portion 117 surrounds the outer door panel 112. The edges of the door panel frame 115 are bent toward the inside of the box to form a third bent portion 118, and the third bent portion 118 surrounds the door panel frame 115. In order to ensure the assembly accuracy, the bent outer door panel 112, the inner door panel 111 and the door panel frame 115 have the same size in the height direction and the same size in the horizontal direction.

The gusset plate 114 can be arranged around the outer door panel 112 and the inner door panel 111. As shown in FIG4 , the gusset plate 114 is arranged on the top of the inner door panel 111 and the outer door panel 112. The gusset plate 114 includes a first side wall 119 and a second side wall 120, and the first side wall 119 and the second side wall 120 are opposite to each other. The first side wall 119 has a first opening 121, and the second side wall 120 has a second opening 122. The positions of the first opening 121 and the second opening 122 correspond to each other. The first bending portion 116 of the inner door panel 111 at the top can be inserted into the first opening 121, and the second bending portion 117 of the outer door panel 112 at the top and the third bending portion 118 of the door panel frame 115 at the top can be inserted into the second opening 122 together. The height of the inner door panel 111 after being inserted into the first opening 121 should be the same as the height of the outer door panel 112 and the door panel frame 115 after being inserted into the second opening 122, so that the inner door panel 111, the outer door panel 112, the door panel frame 115 and the buckle plate 114 together form a closed cavity.

The operator uses a special foaming mold to send the assembled outer door panel 112, inner door panel 111, door panel frame 115 and buckle plate 114 into the foaming platform, foams the closed cavity, and foams the closed cavity to form an insulation layer 113 that fits tightly with the outer door panel 112, inner door panel 111 and buckle plate 114.

Furthermore, the thermal insulation door panel 110 also includes a door seal assembly 130 for sealing the gap between the thermal insulation door panel 110 and the box body, and the door seal assembly 130 includes a door seal, a door seal pressure plate and a connector. The connector can be a bolt connector or a rivet. FIG4 shows a schematic diagram of the connection between the door seal assembly 130 arranged at the top and the inner door panel 111, the outer door panel 112, the door seal frame and the buckle plate 114. The door seal can include a first door seal 131 and a second door seal 132, the door seal pressure plate includes a first door seal pressure plate 133 and a second door seal pressure plate 134, and the connector includes a first connector 135 and a second connector 136. The first door seal pressing plate 133 is arranged on the outer surface of the first door seal 131, and the first connecting member 135 passes through the first door seal pressing plate 133, the first door seal 131, the pinch plate 114 and the first bending portion 116 of the inner door panel 111, so that the first door seal pressing plate 133, the first door seal 131, the pinch plate 114 and the inner door panel 111 are connected together. The second door seal pressing plate 134 is arranged on the outer surface of the second door seal 132, and the second connecting member 136 passes through the second door seal pressing plate 134, the second door seal 132, the pinch plate 114, the second bending portion 117 of the outer door panel 112 and the third bending portion 118 of the door panel frame 115, so that the second door seal pressing plate 134, the second door seal 132, the pinch plate 114, the outer door panel 112 and the door panel frame 115 are connected together. In order to further improve the sealing performance of the door seal assembly 130, the size of the second door seal 132 is larger than that of the first door seal 131, thereby better preventing dust and other debris outside the box from entering the interior of the box.

Of course, the door seal assembly arranged at the top may include only a door seal and a door seal pressure plate, the first connecting member passes through the door seal pressure plate, the door seal, the buckle plate and the first bending portion of the inner door panel, and the second connecting member passes through the door seal pressure plate, the door seal, the buckle plate, the second bending portion of the outer door panel and the third bending portion of the door panel frame. In this way, the inner door panel, the outer door panel, the door panel frame and the buckle plate can also be connected together with the door seal and the door seal pressure plate.

Of course, according to needs, only the top and bottom edges of the inner door panel can be bent toward the outside of the box body, only the top and bottom edges of the outer door panel can be bent toward the inside of the box body, or the edges on either side of the inner door panel can be bent, or the edges on either side of the outer door panel opposite to the inner door panel can be bent.

In an embodiment not shown in the figure, the gusset plate can also be constructed as a groove structure, and the inner door panel, the outer door panel and the door panel frame are not bent. The inner door panel, the outer door panel and the door panel frame are all arranged on the inner side of the groove structure, that is, the gusset plate is wrapped around the outside of the inner door panel, the outer door panel and the door panel frame. In order to ensure the stability of the connection, one side wall of the gusset plate is connected to the inner door panel through a set of bolt connectors, and the gusset plate is connected to the other side wall opposite to the inner door panel through another set of bolt connectors to the door panel frame and the outer door panel. Then, the connected inner door panel, the outer door panel, the door panel frame and the gusset plate are sent to the foaming platform to form the insulation layer 113.

The present invention also provides a method for manufacturing the above-mentioned thermal insulation door panel, the manufacturing method comprising the following steps:

Step 1: Set the gusset plates around the outer door panel and the inner door panel, and connect the outer door panel and the inner door panel to form a closed cavity.

Specifically, step one includes the following steps:

Step 3: Bend the inner door panel and the outer door panel;

The edges of the inner door panel 111 are bent around to form a first bent portion 116. The edges of the outer door panel 112 are bent around to form a second bent portion 117.

Step 4: Openings are respectively formed on two opposite side walls of the gusset plate;

The pinch plate 114 includes a first side wall 119 and a second side wall 120 that are opposite to each other. The first side wall 119 is provided with a first opening 121 , and the second side wall 120 is provided with a second opening 122 .

Step 5: Insert the first bent portion of the inner door panel after the bending process into the opening on one side of the buckle plate, and insert the second bent portion of the outer door panel after the bending process into the opening on the other side of the buckle plate to form a closed cavity.

The first bent portion 116 of the inner door panel 111 is inserted into the first opening 121 , and the second bent portion 117 of the outer door panel 112 is inserted into the second opening 122 , so that the inner door panel 111 , the outer door panel 112 and the buckle plate 114 together form a closed cavity.

Step 6: Bend the door panel frame.

The four edges of the door panel frame 115 are bent to form a third bent portion 118 .

Step seven: Combine the bent door panel frame and the bent outer door panel so that the second bent portion of the outer door panel and the third bent portion of the door panel frame are inserted into the opening on the other side of the buckle plate.

The door panel frame 115 and the outer door panel 112 are assembled together so that the second bent portion 117 and the third bent portion 118 are inserted into the second opening 122 together.

After the closed cavity is formed, the manufacturing method further comprises:

Step 2: Foam the closed cavity to form an insulation layer that fits tightly with the outer door panel, the inner door panel and the gusset plate.

The first bending portion 116 of the inner door panel 111 is inserted into the first opening 121, and the second bending portion 117 of the outer door panel 112 is inserted into the second opening 122. The inner door panel 111, the outer door panel 112 and the buckle plate 114 together form a closed cavity. The assembled inner door panel 111, the outer door panel 112 and the buckle plate 114 are sent to the foaming platform for foaming, thereby forming an insulation layer 113 that is tightly fitted to the inner door panel 111, the outer door panel 112 and the buckle plate 114.

Step 8: Connect the foamed gusset plate, outer door panel, inner door panel and door panel frame with the door seal assembly.

The door seal assembly 130 is arranged on the outer side of the pinch plate 114. As shown in FIG4 , the door seal assembly 130 includes a first door seal 131, a second door seal 132, a first door seal pressure plate 133, a second door seal pressure plate 134, a first connecting member 135 and a second connecting member 136. The first connecting member 135 passes through the first door seal pressure plate 133, the first door seal 131, the pinch plate 114 and the first bending portion 116, and the second connecting member 136 passes through the second door seal pressure plate 134, the second door seal 132, the pinch plate 114, the second bending portion 117 and the third bending portion 118. In this way, the pinch plate 114, the outer door panel 112, the inner door panel 111 and the door panel frame 115 are connected to the door seal assembly 130.

The thermal insulation door panel of the present invention adopts advanced thermal insulation box foaming technology, is easy to operate, and the inner door panel, outer door panel, gusset plate and thermal insulation layer are completely filled. The strength of the thermal insulation door panel using integral foaming is higher than that of ordinary door panels, and the thermal insulation effect of the door panel is increased to prevent water from entering and damaging the door panel structure. At the same time, the use of integral foaming technology also greatly improves the working environment and reduces safety hazards.

Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" and the like appearing in this article can indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the scope of the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims (9)

1. A thermal insulation door panel for a refrigerated transport apparatus, the refrigerated transport apparatus comprising a box, the thermal insulation door panel being disposed on the box, characterized in that the thermal insulation door panel comprises:

an outer door panel;

An inner door panel;

the buckle plate is arranged around the outer door plate and the inner door plate and is connected with the outer door plate and the inner door plate to form a closed cavity,

Wherein the heat-insulating door plate is manufactured according to the following steps, the closed cavity is subjected to integral foaming treatment to form a heat-insulating layer closely attached to the outer door plate, the inner door plate and the buckle plate,

The heat-insulating door plate comprises a box body, and is characterized in that the inner door plate is provided with a first bending part facing the outer side of the box body, the outer door plate is provided with a second bending part facing the inner side of the box body, the buckle plate is provided with two openings which are oppositely arranged, the second bending part and the first bending part are respectively inserted into the two openings, the heat-insulating door plate further comprises a door plate framework, the door plate framework is arranged between the heat-insulating layer and the outer door plate, the buckle plate is arranged at the periphery of the door plate framework, the door plate framework is provided with a third bending part facing the inner side of the box body, the second bending part and the third bending part are inserted into the same opening, the heat-insulating door plate further comprises a door seal assembly, the door seal assembly comprises a first door seal and a second door seal, the connecting piece comprises a first connecting piece and a second connecting piece, and the first connecting piece passes through the first door seal, the buckle plate and the first bending part of the inner door plate is arranged at the periphery of the door plate framework, the second bending part passes through the first door seal, the second buckling plate and the second door seal and the second door plate.

2. The insulated door panel of claim 1, wherein the dock seal assembly further comprises a dock seal platen, the dock seal platen and the dock seal being coupled together with the pinch plate via the coupling member.

3. The insulated door panel of claim 2, wherein the door seal platen comprises a first door seal platen and a second door seal platen,

The first door seal and the first door seal pressing plate are connected with the inner door plate and the buckle plate through the first connecting piece, and the second door seal pressing plate are connected with the outer door plate and the buckle plate through the second connecting piece.

4. A refrigerated transport apparatus comprising the insulated door panel of any of claims 1-3.

5. The insulated door panel of claim 4, wherein the refrigerated transport equipment is a refrigerated truck or a refrigerated container.

6. A method of manufacturing the thermal insulation door panel according to claim 1, comprising:

step one: the pinch plates are arranged around the outer door plate and the inner door plate and are connected with the outer door plate and the inner door plate to form a closed cavity;

step two: and foaming the closed cavity to form an insulating layer closely attached to the outer door plate, the inner door plate and the buckle plate.

7. The method of manufacturing according to claim 6, wherein the first step includes:

Step three: bending the inner door plate and the outer door plate;

step four: openings are respectively formed in two opposite side walls of the pinch plate;

Step five: and inserting the first bending part of the inner door plate after bending into an opening at one side of the buckle plate, and inserting the second bending part of the outer door plate after bending into an opening at the other side of the buckle plate to form a closed cavity.

8. The method of manufacturing of claim 7, wherein the thermal door panel further comprises a door panel skeleton, the step one further comprising:

step six: bending the door plate framework;

Step seven: and combining the bent door plate framework with the bent outer door plate, so that the second bent part of the outer door plate and the third bent part of the door plate framework are jointly inserted into the opening at the other side of the buckle plate.

9. The method of manufacturing of claim 8, wherein the insulated door panel further comprises a dock seal assembly comprising a first dock seal, a second dock seal, a first connector, and a second connector, the method of manufacturing further comprising:

Step eight: after foaming treatment, the first connecting piece passes through the first door seal, the buckle plate and the first bending part so that the first door seal, the buckle plate and the inner door plate are connected together, and the second connecting piece passes through the second door seal, the buckle plate, the second bending part and the third bending part so that the second door seal, the buckle plate, the outer door plate and the door plate framework are connected together.