A shock-resistant cold chain insulation box

Abstract

The present invention relates to an impact-resistant cold chain insulation box, which solves the problems that the existing cold chain insulation boxes have poor impact resistance, high damage rate and replacement rate during logistics loading and unloading and transportation, and high economic cost of replacing cold chain insulation boxes every year. The device includes a box body made of insulation material, and an openable and closable box cover is arranged on the upper side of the box body, and is characterized in that: the box body is rectangular, and three-sided metal corner guards are respectively arranged at the four bottom corners of the box body, and a rectangular bag is arranged on the outer side of the box body, and three-sided rubber corner guards are respectively arranged at the four bottom corners of the bag. The present invention improves the impact resistance of the cold chain insulation box by adding specific corner guards to the bottom corners of the cold chain insulation box, reduces damage during use, greatly improves the service life of the cold chain insulation box, and extends the mandatory scrapping period of the cold chain insulation box according to the usage status, which has very outstanding economic benefits.

Description

Technical Field

[0001] The invention belongs to the field of logistics and transportation, and relates to a logistics insulation box, and in particular to an impact-resistant cold chain insulation box. Background Art

[0002] The logistics industry is an important support for the development of e-commerce, and the vigorous development of e-commerce has promoted the development of the logistics industry. With the further development of online shopping, the logistics industry needs to meet more special distribution needs, and cold chain distribution is one of the key points. At present, most cold chain distribution is based on the delivery of the next day, which requires the insulated transport box of cold chain distribution to meet the insulation requirements of at least 24-30 hours. The existing cold chain distribution insulation box is generally assembled on multiple sides with multiple flat insulation boards, and a bag is provided on the outside. The structure is simple and the impact resistance is poor. During the logistics transportation process, due to the large distribution volume, the cold chain insulation box is prone to collision during transportation, especially during the loading and unloading process. It is difficult to ensure that each box is treated gently during the loading and unloading of a large number of boxes. Therefore, the cold chain insulation box is easily impacted during the loading and unloading and transportation process, resulting in deformation, cracking, and damage, resulting in a decrease in insulation capacity. When the insulation time is less than 24 hours, the cold chain insulation box must be eliminated and replaced. With the current cold chain logistics market size, the number of cold chain insulation boxes in circulation is nearly one million, each insulation box is used 50-100 times a year, and the cost of each cold chain insulation box is between 300-500 yuan. The cold chain insulation boxes currently used in the market have poor impact resistance and high damage rate. Therefore, most logistics merchants require cold chain insulation boxes to be scrapped after one and a half years of use. In fact, more than 30% of cold chain insulation boxes are replaced before the one and a half years of use because they cannot meet the insulation needs. The economic losses caused by the poor impact resistance of cold chain insulation boxes are huge, and this number will further increase as the market scale expands. Summary of the invention

[0003] The present invention mainly solves the problems that the existing cold chain insulation boxes have poor impact resistance, high damage rate and high replacement rate during logistics loading and unloading and transportation, and high economic cost of replacing cold chain insulation boxes each year. It provides an impact-resistant cold chain insulation box, improves the impact resistance of the cold chain insulation box, increases the service life of the cold chain insulation box, extends the mandatory scrapping age of the cold chain insulation box, and reduces the renewal cost of the cold chain insulation box.

[0004] The purpose of the present invention is mainly achieved through the following scheme: an impact-resistant cold chain insulation box, including a box body made of insulation material, an openable box cover is arranged on the upper side of the box body, and the characteristics are: the box body is rectangular, and three-sided metal corner guards are arranged at the four bottom corners of the box body, and a rectangular sleeve is arranged on the outside of the box body, and three-sided rubber corner guards are arranged at the four bottom corners of the sleeve. The box body of this scheme adopts one-piece foaming molding, metal corner guards are arranged at the four bottom corners, and rubber corner guards are arranged at the bottom corners of the sleeve sleeved outside the box. The metal corner guards protect the box body made of foam insulation material, absorb external impact, and prevent the impact force from directly acting on the box body to cause damage to the box body and affect the insulation performance. At the same time, the rubber corner guards of the sleeve form a buffer to reduce the rigid impact on the metal corner guards and cause deformation of the metal corner guards. The rubber corner guards also use their own elasticity to prevent the metal corner guards from breaking the sleeve. The box of this scheme is designed to have thermal insulation performance of more than 40 hours. After a set of 204 drop tests, the box can remain intact and has good thermal insulation performance, which greatly enhances the impact resistance of the cold chain insulation box, reduces damage during use, greatly improves the service life of the cold chain insulation box, and extends the mandatory scrapping age of the cold chain insulation box according to the usage status, with very outstanding economic benefits.

[0005] Preferably, the metal corner guard is formed by bending and welding a flat metal material, the weld is located on the right-angle bisector of the bottom surface of the box, the metal corner guard is a stainless steel plate with a thickness of 0.3-2mm, the metal corner guard has a hollow hole in the middle of the two side surfaces of the box, and the metal corner guard has hollow holes on both sides of the weld on the bottom surface of the box. The metal plate is generally a plate of equal thickness. If a flat plate is used to impact a three-sided right-angle corner guard, the closer the material thickness is to the corner tip, the thinner it is, and the more serious the deformation due to impact. Under this structure, the change in the size of the corner guard does not significantly improve the protective performance. This solution adopts the method of bending and welding metal plates to ensure that the thickness of the metal corner guard is uniform, the metal corner guard has high strength, and the deformation due to impact is small. Hollow holes are opened on all sides of the metal corner guard to reduce the total weight of the box while ensuring strength.

[0006] As another preferred embodiment, the metal corner guard is formed by splicing and bending three square metal plates of the same structure. The corner of the square metal plate corresponding to the top corner of the metal corner guard is the inner corner, and the corner opposite to the inner corner is the outer corner. The two sides of the square metal plate adjacent to the inner corner are respectively provided with protrusions and grooves of matching shapes and corresponding positions. The protrusions and grooves of the adjacent sides of the adjacent square metal plates are correspondingly embedded and form spot-welded welds at the embedded positions. The line connecting the inner and outer corners of the square metal plate is a bending line, and the bending line serves as the edge of the metal corner guard. The bending line and both sides of the square metal plate are respectively provided with hollow holes. In this scheme, the edges with higher impact strength and frequency are bent and formed by the longer diagonal lines of the square metal plates, and the deformation resistance is strong. The weld formed by spot welding is set on the right-angled midline of each side of the metal corner guard, which simplifies the structure of the metal corner guard parts, and the three square metal plates are standard parts, which reduces the processing cost. There is no need to confirm the installation direction during installation, which is easy to operate. The metal corner protector of this solution can be attached to the bottom corner of the box using adhesives such as strong glue, and combined with the rubber corner protector to meet the anti-falling requirements.

[0007] Preferably, the length of each edge of the metal corner guard is 6-18 cm. The vertical edge of the metal corner guard is 0.2-0.5 times the height of the vertical edge of the box body. Fixing pins are provided on both sides of the metal corner guard and each edge of the box body, or adhesive can be used to fix the metal corner guard and the box body. The size of the metal corner guard should be large enough to ensure that the impact force can be fully absorbed by the metal corner guard to reduce the deformation of the box body. The size of the metal corner guard should not be too large. An oversized metal corner guard will cause the box body to be too heavy and the load ratio will be reduced.

[0008] Preferably, the three faces of the rubber corner guard and the three side faces corresponding to the sleeve are respectively provided with fixing rivets, countersunk holes are provided at the matching positions between the rubber corner guard and the outer ends of the fixing rivets, and a gasket is provided between the inner wall of the sleeve and the rivet head. The outer end of the rivet is shrunk inside the rubber corner guard without being exposed, and the inner end of the rivet adopts a gasket with a diameter of 1 cm or more to avoid abrasion of the fabric of the sleeve.

[0009] Preferably, each surface of the rubber corner protector is provided with grooves to reduce the contact area with other objects, the edge lengths of the rubber corner protector in each direction are 4-10 cm, and the thickness of the rubber corner protector is 0.5-2 cm. Grooves are provided on the surface of the rubber corner protector to reduce the contact area, so as to avoid excessive friction between the rubber corner protector and the ground, resulting in the inability to drag, or even tearing the bag.

[0010] Preferably, a circle of strapping tape is tightly bound around the upper ends of the four side walls of the box, and a glass fiber tape is attached to the outside of the strapping tape; or multiple circles of strapping tape are evenly bound around the four side walls of the box from top to bottom, and each circle of strapping tape is arranged in parallel on the side walls of the box from top to bottom, and a glass fiber tape is attached to the outside of the strapping tape. The strapping tape is made of high-strength fiber strapping tape, which is tightened during strapping to tighten the box, thereby preventing the box from being deformed into a diamond shape when it is impacted obliquely by the edges, resulting in cracks at the edges of the box, especially at the corners of the box opening. The glass fiber tape fixes the strapping tape in position to prevent the strapping tape and the surface of the box from sliding and displacing, thereby achieving a better strapping and positioning effect and making the shape beautiful.

[0011] Preferably, the box body includes an integral foamed insulation layer, a hollow board or a glass fiber board is attached to the outside of the insulation layer, and a PET board or a glass fiber board is arranged inside the insulation layer. The insulation layer is made of VIP material or PU+VIP material to play a role in heat insulation.

[0012] The purpose of the present invention can also be achieved through the following scheme: an impact-resistant cold chain insulation box, including a box body made of insulation material, an openable box cover is arranged on the upper side of the box body, characterized in that: the box body is rectangular, and three-sided nylon corner guards are arranged at the four bottom corners of the box body, the length of each edge of the nylon corner guard is 4-15cm, the thickness of the nylon corner guard is 1-5mm, the four side walls of the box body are tightly bound with one or more circles of strapping to prevent the box body from cracking, and glass fiber tape is attached to the outside of the strapping, and there is a rectangular bag on the outside of the box body. The height of the vertical edge of the nylon corner guard is not less than 0.3 times the height of the box body. The nylon corner guard is made of engineering-grade material, with light weight and high strength. It is suitable for small cold chain insulation boxes with a height of less than 60cm and high requirements for the upper limit of the deadweight. When one circle of strapping is provided, it is provided on the side wall of the box near the upper end of the box opening. When multiple circles of strapping are provided, they can be evenly provided on the upper and lower parts of the box to prevent the box from being subjected to oblique impact from the edges and causing diamond-shaped deformation of the box, especially to provide protection for the corners of the box opening.

[0013] Preferably, the nylon corner guard is made of 70-80% nylon 66 reinforced with 20-30% glass fiber. The nylon corner guard is provided with a number of convex ribs on each side connecting the two edges, and the ends of the convex ribs corresponding to the three side positions of the nylon corner guard are connected in series. The box is subjected to various types of impacts, and the most likely to cause damage is the impact received by the vertex of the bottom angle. At this time, the impact force is transmitted radially to the three edges and three faces of the nylon corner guard. The convex ribs are arranged in multiple equilateral triangles, and each convex rib is arranged between adjacent edges on each face of the nylon corner guard, and the angle between the convex rib and the edge is 45 degrees. The direction of the convex rib is perpendicular to the radial transmission direction of the impact force or has an angle greater than 45 degrees, which can well absorb the transmitted impact force. At the same time, along the direction of the convex rib, the strength of the nylon corner guard is improved to prevent cracking.

[0014] The present invention improves the impact resistance of the cold chain insulation box, reduces damage during use, greatly increases the service life of the cold chain insulation box, and extends the mandatory scrapping age of the cold chain insulation box according to the usage status, thereby having very outstanding economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Attached Figure 1 It is a schematic diagram of the first box structure of the present invention.

[0017] Attached Figure 2 The present invention Figure 1 Schematic side view of the box structure.

[0018] Attached Figure 3 The present invention Figure 1 Schematic diagram of the bottom view of the box structure.

[0019] Attached Figure 4 The present invention Figure 1 Schematic diagram of the unfolded structure of the metal corner protector.

[0020] Attached Figure 5 It is a schematic diagram of the second metal corner protector structure of the present invention.

[0021] Attached Figure 6 The present invention Figure 1 Schematic diagram of the structure of the additional package outside the structural box.

[0022] Attached Figure 7 The present invention Figure 1 Comparison table of test conditions for structural insulation boxes and assembled insulation boxes.

[0023] Attached Figure 8 The present invention Figure 1 Drop test table for structural insulation boxes and assembled insulation boxes.

[0024] Attached Fig. 9 The present invention Figure 1 Detail of the structural insulation box after 5 sets of 255 drop tests.

[0025] Attached Fig.10 This is a detailed picture of the comparative assembled incubator after 5 sets of 255 drop tests.

[0026] Attached Fig.11 It is a schematic diagram of the second box structure of the present invention.

[0027] Attached Fig.12 The present invention Fig.11 Schematic side view of the box structure.

[0028] Illustrations: 1. Box body, 2. Box cover, 3. Metal corner protector, 4. Hollow hole, 5. Flat angle, 6. Strapping tape, 7. Fiberglass tape, 8. Weld, 9. Bending line, 10. Sleeve, 11. Rubber corner protector, 12. Countersunk hole, 13. Fixing rivet, 14. Groove, 15. Nylon corner protector, 16. Raised rib. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0030] Embodiment 1: An impact-resistant cold chain insulation box with metal corner guards, such as Figure 1-3 As shown. This embodiment includes a box body 1 made of thermal insulation material, and a box cover 2 that can be opened and closed is arranged on the upper side of the box body. The box body 1 includes an integral foamed insulation layer, the insulation layer is made of PU+VIP material, a hollow board is attached to the outside of the insulation layer, and a PET board is attached to the inside of the insulation layer. The box body is rectangular, and three-sided metal corner guards 3 are respectively arranged at the four bottom corners of the box body. The metal corner guards 3 are made of Figure 4 The flat metal sheet shown is formed by bending and welding, and each side of the metal corner protector 3 is a triangle. The weld 8 is located on the right angle bisector of the bottom surface of the box body, and the metal corner protector is a stainless steel sheet with a thickness of 1 mm. The metal corner protector is formed by bending the sheet rather than stamping, which can ensure the material thickness of the tip of the metal corner protector. The metal corner protector 3 has a triangular hollow hole 4 in the middle of the two side surfaces of the box body, and the metal corner protector has two triangular hollow holes 4 on both sides of the weld of the bottom surface of the box body. The ratio of the height of the vertical edge of the metal corner protector 3 to the vertical edge of the box body 1 is 1:3, and the height of the vertical edge of the metal corner protector is 10 cm. The metal corner protector is fixed to the box body with an adhesive or double-sided tape. The outer ends of the metal corner protector and the box body edges corresponding to the chamfers form a flat angle 5.

[0031] like Figure 6 As shown, there is a rectangular sleeve 10 on the outside of the box, and three-sided rubber corner protectors 11 are respectively arranged at the four bottom corners of the sleeve. The three faces of the rubber corner protector 11 are all rectangular, and the three sides corresponding to the rubber corner protector 11 and the sleeve 10 are respectively provided with fixing rivets 13, and countersunk holes 12 are provided at the matching places between the rubber corner protector and the outer ends of the fixing rivets, and a gasket is provided between the inner wall of the sleeve and the rivet head of the rivet. Each face of the rubber corner protector 11 is provided with a groove 14 to reduce the contact area with other objects, the edge length of each direction of the rubber corner protector is 6 cm, and the thickness of the rubber corner protector is 1 cm.

[0032] like Figure 1 , 2 As shown, three circles of strapping tape 6 are evenly wrapped around the four side walls of the box body 1 from top to bottom, and each circle of strapping tape is arranged in parallel on the side wall of the box body from top to bottom, and a glass fiber tape 7 is attached to the outside of the strapping tape.

[0033] Figure 7-10 This is a comparison test chart of the box described in this embodiment and the commonly used assembled insulation box on the market. The test box is as follows Figure 7 The experimental scheme is as shown in Figure 8 As shown in the figure, the test is repeated for 5 groups, and each box is subjected to 255 drop tests. Fig. 9 As shown, after the drop test, the metal corner of the insulated box of this embodiment is slightly dented, and there is a slight crack at one corner of the static load box opening of the box. The cold storage components are intact, and the overall deformation does not exceed 2%. The box is designed to keep warm for 40 hours. After the drop test, the insulation time can be maintained for more than 32 hours, meeting the needs of cold chain insulation distribution. Fig.10 As shown, the cold storage box of the comparison group deformed and leaked after the impact, the insulation plug board deformed and wrinkled, and the insulation time dropped to less than 20 hours, making it basically unusable.

[0034] Example 2, an impact-resistant cold chain insulation box with metal corner guards, such as Figure 5 The metal corner protection structure of the box body of this embodiment is as shown in Figure 5 As shown, the metal corner guard 3 is composed of three square metal plates with the same structure, which are bent 90 degrees along the bending line and spot welded on the side to form a weld 8. The corner of the square metal plate corresponding to the top corner of the metal corner guard is the inner corner, and the corner opposite to the inner corner is the outer corner. The outer corner is chamfered with a flat angle. The two sides of the square metal plate adjacent to the inner corner are respectively provided with protrusions and grooves of matching shapes and corresponding positions. The groove is a dovetail groove with a wide inner and small notch or a deformation of the dovetail groove. The protrusions and grooves on the adjacent sides of the adjacent square metal plates are correspondingly embedded and form a spot-welded weld 8 at the embedded position. The line connecting the inner and outer corners of the square metal plate is a bending line, and the bending line and both sides of the square metal plate are respectively provided with triangular hollow holes 4. The metal corner guard of this embodiment is assembled and welded by three square metal plate standard parts. The processing cost of the metal corner guard is reduced, and it is more material-saving. The three sides of the formed metal corner guard have the same structure, no specific directionality, and are easier to assemble. The longer diagonal line of the square metal plate is bent to form the edge of the metal corner protector, which has strong anti-deformation ability. The inner surface of the metal corner protector can be bonded to the corner of the box with an adhesive, and the rubber corner protector of the package is used for buffering to meet the anti-falling requirements. Except for the metal corner protector, the rest of the structure of this embodiment is the same as that of embodiment 1.

[0035] Example 3, an impact-resistant cold chain insulation box with nylon corner protectors, such as Figure 11-12As shown. In this embodiment, a box body 1 made of a heat-insulating material is included, and an openable and closable box cover 2 is arranged on the upper side of the box body. The box body 1 includes an integral foamed insulation layer, the insulation layer is made of PU+VIP material, a hollow board is attached to the outside of the insulation layer, and a PET board is attached to the inside of the insulation layer. The box body 1 is rectangular, and three-sided nylon corner guards 15 are respectively arranged at the four bottom corners of the box body. The vertical edge height of the nylon corner guard 15 is 8cm, which is 0.27 times the height of the box body, and the thickness of the nylon corner guard is 3mm. The four side walls of the box body 1 are tightly bound with three circles of strapping tape 6 to prevent the box body from cracking. A glass fiber tape 7 is attached to the outside of the strapping tape, and a rectangular bag is arranged on the outside of the box body. The material of the nylon corner guard is 70-80% nylon 66 plus 20-30% glass fiber reinforcement. The nylon corner guard is provided with a number of convex ribs 16 on each side connecting the two edges, and the ends of the convex ribs corresponding to the three side positions of the nylon corner guard are connected in series.

[0036] This embodiment uses limited and reinforced nylon corner guards to protect the bottom corners of the box body, thereby improving the impact resistance of the cold chain insulation box, reducing damage during use, greatly increasing the service life of the cold chain insulation box, and extending the mandatory scrapping age of the cold chain insulation box according to the usage status, which has very outstanding economic benefits.

Claims

1. An impact-resistant cold chain insulation box, comprising a box body made of insulation material, and an openable and closable box cover is arranged on the upper side of the box body, characterized in that: The box body is rectangular, and three-sided metal corner guards are respectively arranged at the four bottom corners of the box body. A rectangular sleeve is arranged outside the box body, and three-sided rubber corner guards are respectively arranged at the four bottom corners of the sleeve; the metal corner guards are arranged on the outer wall of the bottom corner of the box body, and the rubber corner guards are arranged on the outer wall of the bottom corner of the sleeve; The metal corner guard is formed by bending and welding a flat metal material, the weld is located on the right angle bisector of the bottom surface of the box body, the metal corner guard is a stainless steel plate with a thickness of 0.3-2mm, the metal corner guard has a hollow hole in the middle of the two side surfaces of the box body, and the metal corner guard has hollow holes on both sides of the weld on the bottom surface of the box body; Alternatively, the metal corner guard is formed by splicing and bending three square metal plates with the same structure. The corner of the square metal plate corresponding to the top corner of the metal corner guard is the inner corner, and the corner opposite to the inner corner is the outer corner. The two side edges of the square metal plate adjacent to the inner corner are respectively provided with protrusions and grooves with matching shapes and corresponding positions. The protrusions and grooves on adjacent sides of adjacent square metal plates are correspondingly embedded and form spot welding welds at the embedded positions. The line connecting the inner corner and the outer corner of the square metal plate is the bending line, and the bending line serves as the edge of the metal corner guard. The bending line and both sides of the square metal plate are respectively provided with hollow holes.

2. The impact-resistant cold chain insulation box according to claim 1, characterized in that: The length of each edge of the metal corner protector is 6-18 cm.

3. The impact-resistant cold chain insulation box according to claim 1, characterized in that: The three faces of the rubber corner protector and the three side faces corresponding to the sleeve are respectively provided with fixing rivets, countersunk holes are provided at the matching positions between the rubber corner protector and the outer ends of the fixing rivets, and a gasket is provided between the inner wall of the sleeve and the rivet head.

4. The impact-resistant cold chain insulation box according to claim 1, characterized in that: Each surface of the rubber corner protector is provided with a groove to reduce the contact area with other objects. The length of the edge of the rubber corner protector in each direction is 4-10 cm, and the thickness of the rubber corner protector is 0.5-2 cm.

5. The impact-resistant cold chain insulation box according to claim 1, characterized in that: A circle of strapping tape is tightly bound around the upper ends of the four side walls of the box body, and a glass fiber tape is attached to the outer side of the strapping tape; or a plurality of circles of strapping tape are evenly bound around the four side walls of the box body from top to bottom, and each circle of strapping tape is arranged in parallel on the side walls of the box body from top to bottom, and a glass fiber tape is attached to the outer side of the strapping tape.

6. The impact-resistant cold chain insulation box according to claim 1, characterized in that: The box body comprises an integrally foamed heat insulation layer, a hollow board or a glass fiber board is attached to the outer side of the heat insulation layer, and a PET board or a glass fiber board is arranged on the inner side of the heat insulation layer.

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