Thermal insulation performance detection device for foam packaging box

Abstract

The utility model discloses a foam packing box thermal insulation performance detection device applied to the technical field of detection, which comprises a combined support and a temperature sensing terminal, the combined support comprises a plurality of right-angle plates, a plurality of telescopic columns and a plurality of lengthened plates, and mounting plates are arranged between two ends of each lengthened plate and the pair of right-angle plates. Main bolts are connected between the right-angle plate and the mounting plate and between the lengthened plate and the mounting plate in a threaded mode, the vertical position change process of the multiple temperature sensing terminals is achieved through the telescopic process of the telescopic column, the number of the temperature sensing terminals is reduced, and meanwhile the collection range of the temperature sensing terminals for the temperature in the packaging box is wider; the temperature value data of each temperature sensing terminal is analyzed more comprehensively in the later period, so that a more accurate detection result is obtained, the gas leakage assembly is additionally arranged, in the telescopic process of the telescopic column, the circulation process of gas in the packaging box is achieved, the uniformity of temperature distribution in the packaging box is improved, and the data accuracy of the temperature sensing terminals is further improved.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a device for testing the thermal insulation performance of foam packaging boxes. Background Technology

[0002] Foam boxes are a common storage tool in cold chain logistics. Compared to cold storage and refrigerated trucks, foam boxes offer a variety of sizes and are easy to handle, making them suitable for storing small quantities of goods at low temperatures. As a passive insulation tool, the temperature retention capability of foam boxes is a crucial performance indicator. Therefore, testing their insulation performance before putting them into use is essential.

[0003] Chinese patent CN220752002U discloses a performance testing tool for an insulated box, including: a telescopic bracket and a temperature sensing terminal. The telescopic bracket can be extended laterally and longitudinally, and the temperature sensing terminal is detachably connected to the telescopic bracket. The performance of the insulated box is tested by multiple temperature sensing terminals set on the telescopic bracket, which improves the convenience and efficiency of the testing process and facilitates the analysis of the temperature holding capacity of the insulated box.

[0004] However, in the existing technology, the installation position of the temperature sensing terminal inside the foam packaging box is fixed. Although multiple temperature sensing terminals can be set, the fixed position, coupled with the poor gas flow inside the box, leads to incomplete detection data from the temperature sensing terminals. Utility Model Content

[0005] The core of this utility model lies in the fact that the telescopic column enables the vertical position change of multiple temperature sensing terminals, solving the problem of incomplete detection data caused by the fixed position of the temperature sensing terminals in the prior art. At the same time, through free assembly, it can be adapted to packaging boxes of different sizes, which has great practical benefits.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A device for testing the thermal insulation performance of foam packaging boxes includes a modular support, a temperature sensing terminal, an air pump, and a hose. One end of the hose is fixedly connected to the air pump. The modular support includes multiple right-angle plates, multiple telescopic columns, and multiple extension plates. The extension plates are connected between a pair of right-angle plates on the same horizontal plane. The telescopic columns are fixedly connected between a pair of upper and lower right-angle plates. Mounting plates are provided between both ends of the extension plates and a pair of right-angle plates. Both the right-angle plates and the extension plates are threadedly connected to the mounting plates with main bolts. A first channel communicating with the outside is opened inside the right-angle plates, and a second channel communicating with the outside is opened inside the extension plates. When the ends of the right-angle plates and the extension plates are fitted together, the first channel and the second channel are connected to each other. A connecting pipe is fixedly connected to the outer end of one of the right-angle plates, and the connecting pipe extends into the inside of the right-angle plate and communicates with the first channel. The end of the hose away from the air pump is threadedly connected to the outer end of the connecting pipe. Both ends of the telescopic columns are respectively connected to the first channel inside a pair of right-angle plates.

[0008] Furthermore, a pair of first threaded grooves are provided at the upper end of the right-angle plate, and a pair of second threaded grooves are provided at the upper end of the extension plate. A single mounting plate is located on the upper side of both the second and first threaded grooves. Some main bolts pass through the mounting plate and are threaded into the interior of the second threaded groove, while some main bolts pass through the mounting plate and are threaded into the interior of the first threaded groove.

[0009] Furthermore, the telescopic column includes a soft sleeve, a telescopic rod, and a tension spring that are fixedly connected between a pair of right-angle plates, with the tension spring movably sleeved between the soft sleeve and the telescopic rod.

[0010] Furthermore, an air hole is provided on the inner wall of the first channel near the telescopic column, and the area between the soft sleeve and the telescopic rod is connected to the air hole.

[0011] Furthermore, multiple temperature sensing terminals are provided, and each temperature sensing terminal is respectively located on the upper side of the right-angle end of multiple right-angle plates.

[0012] Optionally, the inner wall of the first channel is provided with a vent hole that communicates with the outside, and the vent hole is provided with a venting component.

[0013] Optionally, the venting assembly includes a sealing plate and a mesh plate fixedly connected to the inner wall of the venting hole. The mesh plate is located at the opening of the venting hole near the outside. One end of the mesh plate near the sealing plate is fixedly connected to one end of a compression spring. The other end of the compression spring abuts against a ball between itself and the sealing plate. The sealing plate has spherical holes that match the ball.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] This solution achieves the vertical position change of multiple temperature sensing terminals through the extension and retraction of the telescopic column. Compared with existing technologies, it not only reduces the number of temperature sensing terminals used, but also makes the temperature sensing terminals collect a wider range of temperature inside the packaging box. This allows for a more comprehensive analysis of the temperature data from each temperature sensing terminal in the later stages, resulting in more accurate detection results.

[0016] By adding a venting component, the gas inside the packaging box is circulated during the extension and retraction of the telescopic column, improving the uniformity of temperature distribution inside the packaging box and further enhancing the data accuracy of the temperature sensing terminal. Attached Figure Description

[0017] Figure 1 The three-dimensional assembly of the first embodiment of this utility model Figure 1 ;

[0018] Figure 2 This is a perspective view of the assembly process according to the first embodiment of this utility model;

[0019] Figure 3 The three-dimensional assembly of the first embodiment of this utility model Figure 2 ;

[0020] Figure 4 This is a perspective view of the right-angle plate and telescopic column in the first embodiment of this utility model;

[0021] Figure 5 This is a side view of the right-angle plate and telescopic column in the first embodiment of the present invention.

[0022] Figure 6 The three-dimensional representation used in the first embodiment of this utility model Figure 1 ;

[0023] Figure 7 This is a side view of the structure when the first embodiment of this utility model is in use;

[0024] Figure 8 The three-dimensional representation used in the first embodiment of this utility model Figure 2 ;

[0025] Figure 9 The three-dimensional representation used in the first embodiment of this utility model Figure 3 ;

[0026] Figure 10 This is a perspective view of the second embodiment of the present utility model;

[0027] Figure 11 This is a schematic diagram of the top surface structure of the right-angle plate in the second embodiment of the present invention. Figure 1 ;

[0028] Figure 12 for Figure 11 Schematic diagram of the structure at point B;

[0029] Figure 13 This is a schematic diagram of the top surface structure of the right-angle plate in the second embodiment of the present invention. Figure 2 .

[0030] Explanation of the labels in the diagram:

[0031] 1 Right-angle plate, 101 First screw groove, 102 First channel, 103 Air hole, 104 Vent hole, 2 Telescopic column, 21 Soft sleeve, 22 Telescopic rod, 23 Tension spring, 3 Extension plate, 301 Second screw groove, 302 Second channel, 303 Third screw groove, 4 Mounting plate, 5 Connecting pipe, 6 Main bolt, 7 Air pump, 8 Hose, 9 Temperature sensing terminal, 10 Horizontal plate, 11 Non-elastic rope, 12 Vent assembly, 121 Sealing plate, 122 Mesh plate, 123 Blocking ball, 124 Compression spring. Detailed Implementation

[0032] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0033] First implementation method:

[0034] Please see Figure 1 and Figure 2 A device for testing the thermal insulation performance of foam packaging boxes includes a modular support frame and a temperature sensing terminal 9 (which is in Figure 6 As shown in the diagram, the combined bracket includes multiple right-angle plates 1, multiple telescopic columns 2, and multiple extension plates 3. The extension plates 3 are connected between a pair of right-angle plates 1 on the same horizontal plane. The telescopic columns 2 are fixedly connected between the upper and lower pairs of right-angle plates 1. Mounting plates 4 are provided at both ends of the extension plates 3 between them and the pair of right-angle plates 1. Both the right-angle plates 1 and the extension plates 3 are threadedly connected to the mounting plates 4 with main bolts 6. A pair of first threaded grooves 101 are provided at the upper end of the right-angle plates 1, and a pair of second threaded grooves 301 are provided at the upper end of the extension plates 3. A single mounting plate... 4 is located on the upper side of both the second screw groove 301 and the first screw groove 101. The first screw groove 101 and the second screw groove 301 have the same size, and the distance from the first screw groove 101 to the end of the right-angle plate 1 is equal to the distance from the second screw groove 301 to the end of the extension plate 3. Part of the main bolts 6 pass through the mounting plate 4 and are threaded into the interior of the second screw groove 301, while another part of the main bolts 6 pass through the mounting plate 4 and are threaded into the interior of the first screw groove 101. Through the mounting plate 4 and the main bolts 6, the assembly and fixation between the right-angle plate 1 and the extension plate 3 are achieved.

[0035] like Figure 4As shown, the telescopic column 2 and the upper and lower right-angle plates 1 form a corner support unit that can extend and retract in the Z-axis direction, serving as the end corner support structure of the combined bracket. Figure 1 and Figure 2 As shown, the combined support structure of this application is a rectangular frame structure, using four right-angle plates 1 as the four corner support points of the rectangular frame, and then according to the foam packaging box to be tested ( Figure 7 (The dimensions of the bracket are represented by A in the diagram, and for ease of description, the packaging box A will be used below.) Install an appropriate number of extension plates 3 between adjacent right-angle plates 1 so that the final combined bracket matches the packaging box A.

[0036] The dimensions and form of the assembled modular support in this application include, but are not limited to, those of the modular support itself. Figure 1 and Figure 3 As shown, Figure 1 In the middle, an extension plate 3 connects adjacent right-angle plates 1 in the X-axis direction and adjacent right-angle plates 1 in the Y-axis direction. Figure 3 Two extension plates 3 are connected between adjacent right-angle plates 1 in the X-axis direction. These two extension plates 3 are also connected and fixed together by mounting plates 4 and main bolts 6. One extension plate 3 is connected between adjacent right-angle plates 1 in the Y-axis direction, making... Figure 3 The length of the medium-combination support is greater than Figure 1 The length of the modular bracket can accommodate larger packaging boxes A. Alternatively, instead of installing the extension plate 3 between adjacent right-angle plates 1, the ends of adjacent right-angle plates 1 can be directly connected and fixed by the mounting plate 4 and the main bolt 6, so that the modular bracket can accommodate smaller packaging boxes A.

[0037] Please see Figure 2 and Figure 4 The right-angle plate 1 has a first channel 102 that communicates with the outside, and the extension plate 3 has a second channel 302 that communicates with the outside. When the ends of the right-angle plate 1 and the extension plate 3 are fitted together, the first channel 102 and the second channel 302 are connected to each other. One of the right-angle plates 1 has a connecting pipe 5 fixedly connected to its outer end, and the connecting pipe 5 extends into the right-angle plate 1 and communicates with the first channel 102. The two ends of the telescopic column 2 are respectively connected to the first channel 102 in a pair of right-angle plates 1. When the right-angle plate 1 and the extension plate 3 are assembled, internal gas circulation can be achieved between multiple right-angle plates 1, multiple telescopic columns 2 and multiple extension plates 3. When gas is injected into the corresponding right-angle plate 1 through the connecting pipe 5, the gas can enter multiple telescopic columns 2, extension plates 3 and the remaining right-angle plates 1.

[0038] Please see Figure 6This application also includes an air pump 7 and a hose 8 with a connector. The air pump 7 is a dual-purpose air pump for both inflation and deflation, and its model can be HIBLOW CD-8S or other suitable types. One end of the hose 8 without a connector is fixedly connected to one port of the air pump 7, and the connector end of the hose 8 is threadedly connected to the outer end of the connecting pipe 5. The other port of the air pump 7 is connected to the outside. In use, the air pump 7, hose 8, and combined bracket are placed together in the packaging box A. The air pump 7 can extract the gas from the packaging box A and input it into the interior of the right-angle plate 1, the telescopic column 2, and the extension plate 3, or extract the gas from the interior of the three components to cause the telescopic column 2 to perform the required inflation and expansion or deflation and contraction (e.g., Figure 4 (As shown).

[0039] Combination Figure 4 and Figure 5 As shown, the telescopic column 2 includes a soft sleeve 21, a telescopic rod 22, and a tension spring 23, all fixedly connected between a pair of right-angle plates 1. The tension spring 23 is movably sleeved between the soft sleeve 21 and the telescopic rod 22. An air hole 103 is provided on the inner wall of the first channel 102 near the telescopic column 2. The area between the soft sleeve 21 and the telescopic rod 22 communicates with the air hole 103, allowing communication between the first channel 102 and the soft sleeve 21, thus enabling gas flow between the right-angle plates 1 and the telescopic column 2. The telescopic rod 22 provides the main support, allowing the upper right-angle plate 1 to move stably up and down as the telescopic column 2 extends and contracts. The soft sleeve 21 is made of a flexible, airtight material, such as soft plastic, to contain gas. Initially, it is in a wrinkled, contracted state. As the internal air pressure increases, it gradually unfolds and overcomes the elastic force of the tension spring 23, forcing the telescopic rod 22 to extend. When the air pressure inside the soft sleeve 21 decreases, under the weight of the right-angle plate 1 and the elastic recovery of the tension spring 23, the upper right-angle plate 1 automatically moves downward. In addition, both the right-angle plate 1 and the extension plate 3 are made of lightweight materials, such as hard plastic, which have a smaller effect on the weight of the telescopic column 2. This makes the elastic recovery of the tension spring 23 play a major role during the downward movement of the right-angle plate 1. When there is no other external force, the elastic deformation of the tension springs 23 at the four corners of the combined bracket will be close to uniform, so that the right-angle plate 1 and the extension plate 3 on the upper side of the telescopic column 2 will remain close to horizontal during the downward movement, and it is not easy to cause a tilting situation where one side is higher than the other.

[0040] Multiple temperature sensing terminals 9 are provided, and the multiple temperature sensing terminals 9 are respectively set on the upper side of the right-angle end of multiple right-angle plates 1.

[0041] The detection principle of this application is the same as that of existing technologies, namely, placing frozen items and a temperature sensing terminal 9 in packaging box A, and monitoring the temperature in packaging box A through the temperature sensing terminal 9 and a temperature controller connected to it. However, unlike existing technologies, the bracket used to support the temperature sensing terminal 9 is static, which fixes the position of the temperature sensing terminal 9 inside the box, limiting the temperature detection results. In contrast, the combined bracket of this application can dynamically shift when supporting the temperature sensing terminal 9, changing the detection position of the temperature sensing terminal 9, increasing the detection range, enriching the detection data, and improving the accuracy of the detection results. The detection operation of this application includes the following:

[0042] Step 1: Assemble the combined bracket that matches the size of the packaging box A to be tested according to the installation method above, and connect one end of the hose 8 to the connecting pipe 5. At this time, the telescopic column 2 is in the retracted state, and the height of the combined bracket is at its lowest.

[0043] Step 2: Install multiple temperature sensing terminals 9 on the upper side of the right-angle ends of multiple right-angle plates 1 respectively. The installation method can be the rope binding method in the existing technology, that is, use rope to bind the temperature sensing terminals 9 to the right-angle plates 1, or use adhesive bonding method.

[0044] In addition, such as Figure 8 and Figure 9 As shown, to further enrich the detection data, a temperature sensing terminal 9 can be connected to the center of the upper plane of the combined bracket. There are two connection methods, method one: as shown... Figure 8 As shown, a horizontal plate 10 is installed between a pair of extended plates 3 on the left and right sides. The upper end of the pair of extended plates 3 is provided with a third screw groove 303 (as shown). Figure 6 As shown), mounting holes are provided at both ends of the horizontal plate 10. The auxiliary bolts are threaded through the mounting holes and connected to the third threaded groove 303. Then, a temperature sensing terminal 9 is installed in the middle of the horizontal plate 10 by binding with rope or adhesive. Method two: (See diagram) Figure 9 As shown, there is no need to set the third screw groove 303 and the horizontal plate 10. Instead, another sufficiently long binding rope is used. A temperature sensing terminal 9 is tied to the middle of the binding rope. The two ends of the binding rope are tied to a pair of extension plates 3 on the left and right sides respectively. The temperature sensing terminal 9 is suspended in the center of the upper plane of the combined bracket.

[0045] Step 3: Place the combined bracket with the temperature sensing terminal 9 installed, the air pump 7, and the controller connected to the air pump 7 into package A. The controller model can be HP Technik MCON III or other suitable type, used to automatically control the opening and closing of the air pump 7. Figure 6 and Figure 7As shown, since the modular support is close to the inner wall of the packaging box A, the air pump 7 can be placed inside the modular support. Then, the frozen items are placed inside the packaging box A, located inside the modular support. The frozen items do not contact the temperature sensing terminal 9. Furthermore, frozen items are not placed directly under the horizontal plate 10 or the non-elastic rope 11 (e.g., Figure 7 As shown, M represents frozen items. A gap is provided between two frozen items M to accommodate the temperature sensing terminal 9 and the horizontal plate 10 or the temperature sensing terminal 9 and the non-elastic rope 11, so that the horizontal plate 10 or the non-elastic rope 11 can move up and down later and is less likely to collide or come into contact with the frozen items.

[0046] Step 4: Close the insulated box lid and start the temperature controller to test the temperature values ​​of each temperature sensing terminal 9. During this process, the controller will periodically start the air pump 7, causing the air pump 7 to rotate forward first and then in reverse. Figure 7 As shown, when the air pump 7 rotates forward, it fills the telescopic column 2 with gas from the packaging box A, causing the telescopic column 2 to expand and extend, pushing the right-angle plate 1, extension plate 3 and temperature sensing terminal 9 on its upper side to move upward. When it rotates in reverse, it draws the gas in the telescopic column 2 back into the packaging box A, and the telescopic column 2 exhausts and contracts, causing the right-angle plate 1, extension plate 3 and temperature sensing terminal 9 on its upper side to move downward. The control operation of the controller is preset by those skilled in the art.

[0047] The above operation realizes the vertical position change of multiple temperature sensing terminals 9 on the upper side of the telescopic column 2. Compared with the existing technology, it not only reduces the number of temperature sensing terminals 9 used, but also makes the temperature sensing terminals 9 collect a wider range of temperature inside the packaging box A. The analysis of the temperature value data of each temperature sensing terminal 9 is more comprehensive in the later stage, thus obtaining more accurate detection results.

[0048] Second implementation method:

[0049] Based on the first embodiment, this implementation selectively adds the following structure: Please refer to Figure 10 and Figure 11 The inner wall of the first channel 102 is provided with a vent 104 that communicates with the outside. The vent 104 is provided with a vent assembly 12. Please refer to [link / reference]. Figure 12 The venting assembly 12 includes a sealing plate 121 and a mesh plate 122 fixedly connected to the inner wall of the venting hole 104. The mesh plate 122 is located at the opening of the venting hole 104 near the outside. One end of the mesh plate 122 near the sealing plate 121 is fixedly connected to one end of a compression spring 124. The other end of the compression spring 124 abuts against the sealing plate 121 with a ball stop 123. The sealing plate 121 has a spherical hole that matches the ball stop 123.

[0050] The maximum outer diameter of the compression spring 124 and the maximum inner diameter of the spherical hole are both smaller than the diameter of the plug ball 123, so that in the initial state, the plug ball 123 stably abuts against the compression spring 124 and the sealing plate 121, and at this time the compression spring 124 is in a compressed state. The venting assembly 12 is similar to a spring-type one-way valve structure, and external gas cannot enter the first channel 102 through the vent hole 104. However, when the gas pressure in the first channel 102 is too high, such as... Figure 13 As shown, when the air pressure overcomes the elastic force of the compression spring 124, the gas will squeeze the plug ball 123, forcing the compression spring 124 to continue to be compressed, and a gap will be generated between the plug ball 123 and the spherical hole, through which the gas in the first channel 102 flows to the outside.

[0051] By setting the venting component 12, the following effects are added without affecting the normal testing process of the first embodiment of this application: When the air pump 7 is started to inflate the telescopic column 2, after the telescopic column 2 is extended to its maximum extent, that is, the telescopic rod 22 is extended to its longest length and the soft sleeve 21 is inflated to its maximum extent, the air pump 7 can continue to rotate forward to inflate the telescopic column 2. Since the soft sleeve 21 and the first channel 102 are connected, their air pressures are consistent. The air pressure in the first channel 102 continues to increase, which will force the blocking ball 123 to overcome the elastic force of the compression spring 124 and squeeze the compression spring 124 towards the mesh plate 122. At this time, the right angle plate 1 and the telescopic column 2 are inflated to their maximum extent. Excess gas in column 2 can flow out through the gap between the plug ball 123 and the spherical hole, returning to the packaging box A. That is, the air pump 7 draws gas from the packaging box A and delivers it to the right-angle plate 1 and the telescopic column 2, so that the gas is dispersed back to the packaging box A through the vent holes 104 on each right-angle plate 1. This process realizes the circulation of gas in the packaging box A, so that the temperature in the packaging box A is evenly distributed, further improving the data accuracy of the temperature sensing terminal 9. By analyzing the temperature change curve detected by the temperature sensing terminal 9, the heat preservation performance of the packaging box A can be effectively obtained. For example, the faster the temperature rises, the worse the heat preservation performance; conversely, the slower the temperature rises, the better the heat preservation performance.

[0052] Additional explanation: The elastic coefficient of the compression spring 124 is much greater than that of the tension spring 23, so that the compression spring 124 in the compressed state will not deform further before the telescopic column 2 is extended to its maximum extent, which facilitates the smooth extension process of the telescopic column 2 and makes it less likely for premature air leakage to occur at the air release component 12.

[0053] Compared to the first embodiment, the addition of the venting component 12 in this embodiment increases the structural and manufacturing costs, but it also improves the accuracy of the detection. Therefore, those skilled in the art can selectively implement either embodiment based on actual detection needs and cost requirements.

[0054] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A device for detecting the thermal insulation performance of a foam packaging box, comprising a combined support and a temperature sensing terminal (9), characterized in that: It also includes air pump (7) and hose (8), one end of the hose (8) is fixed communication with air pump (7), the combined support includes a plurality of right angle plate (1), a plurality of telescopic column (2) and a plurality of lengthening plate (3), the lengthening plate (3) is connected between a pair of right angle plate (1) on the same horizontal plane, the telescopic column (2) is fixedly connected between a pair of right angle plate (1) up and down, both ends of the lengthening plate (3) and a pair of right angle plate (1) are provided with mounting plate (4), the right angle plate (1) and lengthening plate (3) are both threadedly connected with main bolt (6) between mounting plate (4), the inside of the right angle plate (1) is provided with first channel (102) which communicates with the outside, the inside of the lengthening plate (3) is provided with second channel (302) which communicates with the outside, when the end of the right angle plate (1) and lengthening plate (3) is mutually adhered, the first channel (102) and second channel (302) are mutually communicated, one of the right angle plate (1) is fixedly connected with the outer end of the connecting pipe (5), and the connecting pipe (5) extends to the inside of the right angle plate (1) and is communicated with the first channel (102), the end of the hose (8) away from the air pump (7) is threadedly connected with the outer end of the connecting pipe (5), the two ends of the telescopic column (2) are respectively communicated with the first channel (102) in a pair of right angle plate (1).

2. The device for detecting the thermal insulation performance of a foam packaging box according to claim 1, characterized in that: The upper end of the right angle plate (1) is provided with a pair of first screw groove (101), the upper end of the lengthening plate (3) is provided with a pair of second screw groove (301), the mounting plate (4) is located on the upper side of the second screw groove (301) and the first screw groove (101) at the same time, part of the main bolt (6) penetrates the mounting plate (4) and is threadedly connected in the inside of the second screw groove (301), part of the main bolt (6) penetrates the mounting plate (4) and is threadedly connected in the inside of the first screw groove (101).

3. The device for detecting the thermal insulation performance of a foam packaging box according to claim 1, characterized in that: The telescopic column (2) includes soft cover (21) fixedly connected between a pair of right angle plate (1), telescopic rod (22) and tension spring (23), the tension spring (23) is movably sleeved between the soft cover (21) and the telescopic rod (22).

4. The apparatus for testing the thermal insulation performance of a foam packaging box according to claim 3, characterized in that: The air hole (103) is arranged on the inner wall of the first channel (102) close to the telescopic column (2), the region between the soft cover (21) and the telescopic rod (22) is communicated with the air hole (103).

5. The device for testing the thermal insulation performance of a foam packaging box according to claim 1, characterized in that: A plurality of temperature sensing terminals (9) are arranged, and the plurality of temperature sensing terminals (9) are arranged on the upper side of the right angle end of the plurality of right angle plates (1).

6. The device for testing the thermal insulation performance of a foam packaging box according to claim 1, characterized in that: The inside wall of the first channel (102) is provided with air release hole (104) which communicates with the outside, the inside of the air release hole (104) is provided with air release assembly (12).

7. The apparatus of claim 6, wherein: The deflation assembly (12) comprises a sealing plate (121) fixedly connected with the inner wall of the deflation hole (104) and a mesh plate (122), the mesh plate (122) is located at the hole opening of the deflation hole (104) close to the outside, one end of the mesh plate (122) close to the sealing plate (121) is fixedly connected with one end of a compression spring (124), the other end of the compression spring (124) and the sealing plate (121) abut against a plug ball (123), and a spherical hole matched with the plug ball (123) is formed in the sealing plate (121).

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