Nuclear track membrane fresh-keeping box for fruit and vegetable distribution

Abstract

The utility model discloses a nuclear track membrane fresh-keeping box for fruit and vegetable distribution, and relates to the fruit and vegetable fresh-keeping technical field, the nuclear track membrane fresh-keeping box comprises an inner box and a nuclear track membrane, the outer side of the inner box is fixedly provided with an outer box, the upper end of the outer box is hinged with a box cover, the upper end of a clamping seat is provided with the nuclear track membrane, and the upper end of the clamping seat is provided with a clamping cover in a matched manner; an adjusting mechanism is arranged at the upper end of the clamping cover, a fixing frame is fixedly arranged in the inner box, an isolation plate is tightly attached to the upper end of the fixing frame, and fixing mechanisms are arranged on the two sides of the outer box. The ventilation hole is formed in the upper end of the box cover, the nuclear track membrane is arranged in the ventilation hole, then the temperature and humidity in the inner box are automatically adjusted, the isolation plate is arranged in the inner box, and the sponge mat is arranged at the upper end of the isolation plate, so that during use, the sponge mat can absorb water drops generated by fruits and vegetables; and water drops are discharged to the bottom end in the inner box, so that rotting of fruits and vegetables at the bottom is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fruit and vegetable preservation, in particular to a nuclear pore membrane fresh-keeping box for fruit and vegetable distribution. Background Technique

[0002] Under the background of the rapid development of modern agriculture and fresh food e-commerce, the fresh-keeping technology for fruit and vegetable distribution has become a key link in ensuring the quality of agricultural products. During transportation, fruits and vegetables are prone to rot and deteriorate due to problems such as mechanical damage, out-of-control temperature and humidity, respiration, and microbial growth. Therefore, higher requirements are put forward for the structural design and fresh-keeping function of distribution boxes.

[0003] The authorized announcement number is: CN219407424U, which discloses a special transportation and distribution box for fruits and vegetables. The distribution box increases the contact area between ice bags and fruits and vegetables through the layered structure of the V-shaped plate and the bottom plate, and realizes buffer protection in cooperation with rubber pads and springs, taking into account both fresh-keeping and shock-proof functions.

[0004] However, the above distribution box faces two major technical problems during use: First, the water vapor generated by the respiration of fruits and vegetables and the condensed water formed by the melting of ice bags are likely to accumulate at the bottom of the box. Although the V-shaped plate design can guide the melted water of the ice bags to flow to both sides, the bottom of the box will still form a humid environment due to water vapor condensation and residual melted water, resulting in the bottom-layer fruits and vegetables being in contact with accumulated water for a long time, accelerating the growth of mold and rot and deterioration. Second, the overall structure of the distribution box is relatively closed, lacking an effective gas exchange channel. During storage, fruits and vegetables continuously carry out respiration, consuming oxygen and releasing carbon dioxide. The closed environment will cause the oxygen concentration in the box to gradually decrease and the carbon dioxide concentration to increase, forming a microenvironment that is not conducive to fruit and vegetable preservation. During long-distance transportation, the low-oxygen environment may trigger anaerobic respiration of fruits and vegetables, producing odors and accelerating cell senescence, significantly affecting their freshness and shelf life.

[0005] Based on this, a nuclear pore membrane fresh-keeping box for fruit and vegetable distribution is now provided, which can eliminate the drawbacks of existing devices. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a nuclear pore membrane fresh-keeping box for fruit and vegetable distribution, so as to solve the problems of water accumulation at the bottom end of the fresh-keeping box and poor fresh-keeping effect in the background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A nuclear pore membrane fresh-keeping box for fruit and vegetable distribution, comprising an inner box and a nuclear pore membrane. An outer box is fixedly arranged on the outside of the inner box. A vacuum layer is formed between the inner box and the outer box. A box cover is hingedly arranged at the upper end of the outer box. An air vent is arranged at the upper end of the box cover. A clamping seat is fixedly arranged inside the air vent. A nuclear pore membrane is arranged at the upper end of the clamping seat. A clamping cover is arranged at the upper end of the clamping seat in a matching manner. External threads are arranged on the outside of the clamping seat. Internal threads corresponding to the external threads are arranged on the clamping cover. An adjusting mechanism for adjusting the air volume at the end of the air vent is arranged at the upper end of the clamping cover. A fixing frame is fixedly arranged inside the inner box. A partition board is closely arranged at the upper end of the fixing frame. A sponge pad is closely arranged at the upper end of the partition board. A plurality of walking wheels are arranged at the bottom end of the outer box. Fixing mechanisms for fixing the inner box are arranged on both sides of the outer box.

[0009] On the basis of the above technical solutions, the present utility model also provides the following optional technical solutions:

[0010] In an optional solution: The adjusting mechanism includes an adjusting ring. The adjusting ring is closely arranged at the upper end of the clamping cover. A first blocking frame is arranged in the middle of the adjusting ring. A second blocking frame is closely arranged at the bottom end of the first blocking frame. The second blocking frame is fixedly arranged in the middle of the clamping cover. A connecting pipe is rotatably arranged in the middle of the first blocking frame. The connecting pipe is fixedly arranged at the upper end of the second blocking frame. Limiting columns are symmetrically arranged at the upper end of the clamping cover. First limiting grooves are arranged at the positions corresponding to the limiting columns at the bottom end of the adjusting ring. A first stop plate is fixedly arranged at the upper end of the clamping cover. Second limiting grooves are arranged at the positions corresponding to the first stop plate at the bottom end of the adjusting ring. A second stop plate is closely arranged at the upper end of the first stop plate. The second stop plate is slidably arranged in the installation pipe. The installation pipe is fixedly arranged at the upper end of the adjusting ring. The second stop plate is fixedly arranged at one end of the pull rod. The pull rod is slidably arranged in the sliding hole at the upper end of the installation pipe. A first return spring is arranged between one end of the pull rod and the upper end inside the installation pipe. A plurality of stop bars are arranged at the bottom end of the second stop plate. A plurality of stop grooves are arranged at the upper end of the first stop plate.

[0011] In an optional solution: The fixing mechanism includes a first fixing pipe. The first fixing pipes are fixedly arranged on both sides of the outer box. A sliding frame is slidably arranged inside the first fixing pipe. A fixing rod is fixedly arranged at the bottom end of the sliding frame. The fixing rod extends to the outside of the first fixing pipe. The bottom ends of the sliding frames are respectively fixedly connected with one ends of two second return springs. The other ends of the second return springs are fixedly connected with the bottom ends inside the first fixing pipe. A brake plate is fixedly arranged at the other end of the fixing rod. Anti-slip stripes and an anti-slip layer are arranged at the bottom end of the brake plate. A limiting component for fixing the working position of the sliding frame is arranged on one side of the outer box.

[0012] In an alternative solution: The limiting component includes a limiting rod. The two ends of the sliding frame are respectively provided with a limiting rod in a matching manner. The limiting rod is slidably arranged in the second fixed tube. The second fixed tube is fixedly arranged on one side of the outer box. A third return spring is arranged between one end of the limiting rod and one end inside the second fixed tube. The two limiting rods are respectively fixedly arranged at both ends of the connecting frame. The connecting frame is closely arranged on the upper end of the first fixed tube.

[0013] In an alternative solution: Positioning grooves are respectively arranged at the positions corresponding to the walking wheels on the upper end of the box cover. Handles are respectively arranged at the positions corresponding to one side of the two brake plates on the upper end of the box cover.

[0014] In an alternative solution: A number of first support frames are arranged in the vacuum layer. The first support frames are fixedly connected to the outer side of the inner box and the inner side of the outer box. A second support frame is fixedly arranged between the bottom end of the inner box and the bottom end of the outer box.

[0015] In an alternative solution: A number of blocking rods are fixedly arranged at equal intervals on the inner bottom end of the inner box. The cross section of the blocking rod is triangular.

[0016] In an alternative solution: A number of arc-shaped grooves are arranged on the outer side of the clamping cover.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The present utility model combines the inner box and the outer box to form a delivery box, so that the delivery box can reduce the influence of external temperature. At the same time, by arranging ventilation holes on the upper end of the box cover and a nuclear pore membrane inside the ventilation holes, the air inside the inner box can flow, and the nuclear pore membrane can autonomously adjust the temperature and humidity inside the inner box. At the same time, by arranging an adjustment mechanism, according to different types of fruits and vegetables, the working area of the nuclear pore membrane can be adjusted, and then the ventilation volume inside the inner box can be adjusted. By arranging a partition board inside the inner box and a sponge pad on the upper end of the partition board, when in use, the sponge pad can absorb the water droplets generated by the fruits and vegetables themselves and discharge the water droplets to the inner bottom end of the inner box, thereby reducing the rotting of the fruits and vegetables at the bottom. At the same time, the sponge pad reduces the damage to the fruits and vegetables caused by bumps. By arranging a number of blocking rods, ice cubes can be placed at the inner bottom end of the inner box to keep the fruits and vegetables inside the inner box fresh, thereby increasing the practicability of the nuclear pore membrane fresh-keeping box. Brief Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the present utility model.

[0020] Figure 2 It is an installation schematic diagram of the second support frame and the blocking rod of the present utility model.

[0021] Figure 3 It is a structural schematic diagram of the partition board of the present utility model.

[0022] Figure 4 This is a schematic structural diagram of the first support frame of the present utility model.

[0023] Figure 5 This is a schematic diagram of the installation of the nuclear pore membrane of the present utility model.

[0024] Figure 6 This is a schematic structural diagram of the clamping cover and the first stop plate of the present utility model.

[0025] Figure 7 This is a schematic structural diagram of the adjusting ring of the present utility model.

[0026] Figure 8 This is a schematic structural diagram of the sliding frame of the present utility model.

[0027] Annotation of reference numerals: 11 inner box, 12 outer box, 13 vacuum layer, 14 first support frame, 15 second support frame, 16 walking wheels, 17 box cover, 18 retaining rod, 19 fixing frame, 20 partition board, 21 sponge pad, 22 ventilation hole, 23 nuclear pore membrane, 24 clamping seat, 25 clamping cover, 26 adjusting ring, 27 first stop plate, 28 second stop plate, 29 first return spring, 30 handle, 31 positioning groove, 32 first fixing tube, 33 brake plate, 34 sliding frame, 35 second return spring, 36 limiting rod, 37 third return spring. Detailed implementation manners

[0028] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] In one embodiment, as Figures 1-8As shown in the figure, a nuclear pore membrane fresh-keeping box for fruit and vegetable distribution includes an inner box 11 and a nuclear pore membrane 23. An outer box 12 is fixedly arranged on the outside of the inner box 11. A vacuum layer 13 is formed between the inner box 11 and the outer box 12. A box cover 17 is hinged to the upper end of the outer box 12. An air vent 22 is arranged on the upper end of the box cover 17. A clamping seat 24 is fixedly arranged inside the air vent 22. A nuclear pore membrane 23 is arranged on the upper end of the clamping seat 24. A clamping cover 25 is arranged in cooperation with the upper end of the clamping seat 24. External threads are arranged on the outside of the clamping seat 24. Internal threads corresponding to the external threads are arranged on the clamping cover 25. An adjusting mechanism for adjusting the air volume at the end of the air vent 22 is arranged on the upper end of the clamping cover 25. A fixing frame 19 is fixedly arranged inside the inner box 11. A partition plate 20 is closely arranged on the upper end of the fixing frame 19. A sponge pad 21 is closely arranged on the upper end of the partition plate 20. A plurality of walking wheels 16 are arranged at the bottom end of the outer box 12. Fixing mechanisms for fixing the inner box 11 are arranged on both sides of the outer box 12. The adjusting mechanism is convenient for adjusting the ventilation area at one end of the air vent 22, and further adjusting the air volume inside the inner box 11. The fixing mechanism is convenient for preventing the outer box 12 from moving during transportation;

[0030] The adjusting mechanism includes an adjusting ring 26. The adjusting ring 26 is closely arranged on the upper end of the clamping cover 25. A first blocking frame is arranged in the middle of the adjusting ring 26. A second blocking frame is closely arranged at the bottom end of the first blocking frame. The second blocking frame is fixedly arranged in the middle of the clamping cover 25. A connecting pipe is rotatably arranged in the middle of the first blocking frame. The connecting pipe is fixedly arranged on the upper end of the second blocking frame. Limit posts are symmetrically arranged on the upper end of the clamping cover 25. First limiting grooves are arranged at positions corresponding to the limit posts at the bottom end of the adjusting ring 26. A first stop plate 27 is fixedly arranged on the upper end of the clamping cover 25. Second limiting grooves are arranged at positions corresponding to the first stop plate 27 at the bottom end of the adjusting ring 26. A second stop plate 28 is closely arranged on the upper end of the first stop plate 27. The second stop plate 28 is slidably arranged in an installation pipe. The installation pipe is fixedly arranged on the upper end of the adjusting ring 26. The second stop plate 28 is fixedly arranged at one end of a pull rod. The pull rod is slidably arranged in a sliding hole at the upper end of the installation pipe. A first return spring 29 is arranged between one end of the pull rod and the upper end inside the installation pipe. A plurality of stop bars are arranged at the bottom end of the second stop plate 28. A plurality of stop grooves are arranged on the upper end of the first stop plate 27. When in use, when different types of fruits and vegetables need to be distributed and transported, according to the air volume required by the fruits and vegetables, the second stop plate 28 is pulled away from the first stop plate 27 through the pull rod, so that the adjusting ring 26 rotates on the upper end of the clamping cover 25, thereby changing the area of the overlapping part of the first blocking frame and the second blocking frame, and further adjusting the air permeability at one end of the air vent 22. After the adjustment is completed, the pull rod is released, so that the stop bars at the bottom end of the second stop plate 28 cooperate with the stop grooves on the upper end of the first stop plate 27 to fix the adjusting ring 26.

[0031] The fixing mechanism includes a first fixing tube 32. The first fixing tubes 32 are fixedly arranged on both sides of the outer box 12. A sliding frame 34 is slidably arranged inside the first fixing tube 32. A fixing rod is fixedly arranged at the bottom end of the sliding frame 34. The fixing rod extends to the outside of the first fixing tube 32. One ends of two second return springs 35 are respectively fixedly connected to the bottom end of the sliding frame 34. The other ends of the second return springs 35 are fixedly connected to the inner bottom end of the first fixing tube 32. The other end of the fixing rod is fixedly provided with a brake plate 33. Anti-slip stripes and an anti-slip layer are arranged at the bottom end of the brake plate 33. A limiting component for fixing the working position of the sliding frame 34 is arranged on one side of the outer box 12.

[0032] The limiting component includes a limiting rod 36. The limiting rods 36 are arranged in cooperation with both ends of the sliding frame 34. The limiting rods 36 are slidably arranged inside a second fixing tube. The second fixing tube is fixedly arranged on one side of the outer box 12. A third return spring 37 is arranged between one end of the limiting rod 36 and one end of the inner part of the second fixing tube. The two limiting rods 36 are respectively fixedly arranged at both ends of a connecting frame. The connecting frame is closely arranged on the upper end of the first fixing tube 32. During use, when fruits and vegetables need to be delivered, the isolation plate 20 is placed inside the inner box 11. Then the sponge pad 21 is placed on the upper end of the isolation plate 20 to reduce the damage of fruits and vegetables during delivery. Then the box cover 17 is closed. Then the nuclear pore membrane 23 can adjust the temperature and humidity inside the inner box 11 by using its own characteristics. At the same time, the vacuum layer 13 can reduce the great influence of the external temperature on the inside of the inner box 11. When the position of the outer box 12 needs to be fixed, the brake plate 33 is driven to move through the sliding frame 34 and the fixing rod. When the brake plate 33 is in close contact with the ground, the limiting rod 36 fixes the position of the sliding frame 34, thereby fixing the outer box 12.

[0033] Positioning grooves 31 are arranged at the positions corresponding to the walking wheels 16 on the upper end of the box cover 17. Handles 30 are arranged at the positions corresponding to one side of the two brake plates 33 on the upper end of the box cover 17. During use, when the outer box 12 needs to be moved, the outer box 12 can be pushed to move through the handle 30. When fruits and vegetables need to be delivered and several outer boxes 12 need to be stacked and placed, the walking wheels 16 at the bottom of another delivery box are placed inside the positioning grooves 31 at the upper end of one delivery box. Then when the upper brake plate 33 moves, one side of the brake plate 33 is in close contact with the handle 30, thereby limiting and fixing the upper delivery box to prevent the displacement and inclination of the delivery box during delivery.

[0034] A number of first support frames 14 are arranged inside the vacuum layer 13. The first support frames 14 are fixedly connected to the outer side of the inner box 11 and the inner side of the outer box 12. A second support frame 15 is fixedly arranged between the bottom end of the inner box 11 and the bottom end of the outer box 12. During use, it is convenient to support the inner box 11 to prevent the inner box 11 from deforming during use.

[0035] A number of retaining bars 18 are fixedly arranged at equal intervals at the inner bottom end of the inner box 11. The cross-section of the retaining bar 18 is triangular. During use, when it is necessary to refrigerate the fruits and vegetables inside the inner box 11, ice cubes can be placed at the inner bottom end of the inner box 11. The retaining bars 18 can reduce the shaking between the ice cubes. Since the fruits and vegetables are placed on the upper end of the sponge pad 21, the sponge pad 21 is placed on the upper end of the partition board 20, and the nuclear pore membrane 23 allows the air inside the inner box 11 to circulate. Thus, the water droplets generated by the condensation of the ice cubes are all collected at the inner bottom end of the inner box 11 and will not affect the fruits and vegetables at the bottom.

[0036] A number of arc-shaped grooves are arranged on the outer side of the clamping cover 25. During use, when it is necessary to replace the nuclear pore membrane 23, it is convenient to twist the clamping cover 25 by hand through the arc-shaped grooves, so that the clamping cover 25 is separated from the clamping seat 24, thereby facilitating the replacement of the nuclear pore membrane 23, and further enabling the fresh-keeping box formed by the inner box 11, the outer box 12 and the box cover 17 to be reused.

[0037] The above embodiment discloses a nuclear pore membrane fresh-keeping box for fruit and vegetable distribution. Among them, when it is necessary to distribute fruits and vegetables, the partition board 20 is placed inside the inner box 11, and then the sponge pad 21 is placed on the upper end of the partition board 20 to reduce the damage of the fruits and vegetables during distribution. Then the box cover 17 is closed. Then, the nuclear pore membrane 23 can utilize its own characteristics to adjust the temperature and humidity inside the inner box 11. When it is necessary to fix the position of the outer box 12, the brake plate 33 is driven to move through the sliding frame 34 and the fixed rod. When the brake plate 33 is in close contact with the ground, the position of the sliding frame 34 is fixed by the limiting rod 36, thereby fixing the outer box 12. When it is necessary to refrigerate the fruits and vegetables inside the inner box 11, ice cubes can be placed at the inner bottom end of the inner box 11. Since the fruits and vegetables are placed on the upper end of the sponge pad 21, the sponge pad 21 is placed on the upper end of the partition board 20, and the nuclear pore membrane 23 allows the air inside the inner box 11 to circulate. Thus, the water droplets generated by the condensation of the ice cubes and the water droplets generated by the fruits and vegetables themselves are all collected at the inner bottom end of the inner box 11.

[0038] When different types of fruits and vegetables need to be distributed and transported, according to the ventilation volume required by the fruits and vegetables, the second stop plate 28 is pulled away from the first stop plate 27 by the pull rod, so that the adjusting ring 26 rotates on the upper end of the clamping cover 25, thereby changing the area of the overlapping part of the first baffle and the second baffle, and then adjusting the ventilation volume at one end of the ventilation hole 22. After the adjustment is completed, the pull rod is released, so that the stop bar at the bottom end of the second stop plate 28 cooperates with the stop groove at the upper end of the first stop plate 27 to fix the adjusting ring 26. When replacing the nuclear pore membrane 23, the arc-shaped groove facilitates the hand to twist the clamping cover 25, so that the clamping cover 25 is separated from the clamping seat 24, thereby facilitating the replacement of the nuclear pore membrane 23. And the nuclear pore membrane 23 is an existing component. The nuclear pore membrane 23 realizes gas selective permeation through the microporous structure, so as to independently adjust the temperature and humidity inside the box. The technology is relatively mature and will not be elaborated here.

[0039] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A nuclear pore membrane fresh-keeping box for fruit and vegetable distribution, comprising an inner box (11) and a nuclear pore membrane (23), an outer box (12) being fixedly provided on the outer side of the inner box (11), a vacuum layer (13) being formed between the inner box (11) and the outer box (12), a box cover (17) being hingedly provided at the upper end of the outer box (12), a vent hole (22) being provided at the upper end of the box cover (17), and characterized in that: A snap-fit ​​seat (24) is fixedly provided inside the vent hole (22), a nuclear pore membrane (23) is provided at the upper end of the snap-fit ​​seat (24), a snap-fit ​​cover (25) is provided at the upper end of the snap-fit ​​seat (24), an external thread is provided on the outer side of the snap-fit ​​seat (24), an internal thread is provided at a position corresponding to the external thread on the snap-fit ​​cover (25), an adjustment mechanism for adjusting the ventilation volume at the end of the vent hole (22) is provided at the upper end of the snap-fit ​​cover (25), a fixing frame (19) is fixedly provided inside the inner box (11), an isolation plate (20) is tightly provided at the upper end of the fixing frame (19), a sponge pad (21) is tightly provided at the upper end of the isolation plate (20), a plurality of running wheels (16) are provided at the bottom end of the outer box (12), and fixing mechanisms for fixing the inner box (11) are provided on both sides of the outer box (12).

2. A nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 1, characterized in that: The adjustment mechanism comprises an adjustment ring (26), the adjustment ring (26) being closely arranged on the upper end of the snap-on cover (25), a first stop frame being arranged in the middle of the adjustment ring (26), a second stop frame being closely arranged on the bottom end of the first stop frame, the second stop frame being fixedly arranged in the middle of the snap-on cover (25), a connecting pipe being rotatably arranged in the middle of the first stop frame, the connecting pipe being fixedly arranged on the upper end of the second stop frame, a limiting column being symmetrically arranged on the upper end of the snap-on cover (25), a first limiting groove being arranged at the bottom end of the adjustment ring (26) corresponding to the position of the limiting column, a first stop plate (27) being fixedly arranged on the upper end of the snap-on cover (25), the adjustment ring (26) A second limit groove is provided at the bottom end of the bracket (26) corresponding to the position of the first stop plate (27), a second stop plate (28) is tightly provided at the upper end of the first stop plate (27), the second stop plate (28) is slidably provided in the mounting tube, the mounting tube is fixedly provided at the upper end of the adjusting ring (26), the second stop plate (28) is fixedly provided at one end of the pull rod, the pull rod is slidably provided in the sliding hole at the upper end of the mounting tube, a first return spring (29) is provided between one end of the pull rod and the upper end of the mounting tube, a plurality of stop strips are provided at the bottom end of the second stop plate (28), and a plurality of stop grooves are provided at the upper end of the first stop plate (27).

3. The nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 1, characterized in that: The fixing mechanism comprises a first fixing tube (32), the first fixing tube (32) is fixedly provided on both sides of the outer box (12), a sliding frame (34) is slidably provided inside the first fixing tube (32), a fixing rod is fixedly provided at the bottom end of the sliding frame (34), the fixing rod extends to the outside of the first fixing tube (32), the bottom end of the sliding frame (34) is fixedly connected to one end of two second return springs (35) respectively, the other end of the second return spring (35) is fixedly connected to the bottom end of the first fixing tube (32), a brake plate (33) is fixedly provided at the other end of the fixing rod, and the bottom end of the brake plate (33) is provided with anti-skid stripes and an anti-skid layer, and a limiting component for fixing the working position of the sliding frame (34) is provided on one side of the outer box (12).

4. The nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 3, characterized in that: The limiting assembly comprises a limiting rod (36), both ends of the sliding frame (34) are matched with limiting rods (36), the limiting rod (36) is slidably arranged in a second fixed tube, the second fixed tube is fixedly arranged on one side of the outer box (12), a third return spring (37) is arranged between one end of the limiting rod (36) and one end inside the second fixed tube, the two limiting rods (36) are respectively fixedly arranged at the two ends of the connecting frame, and the connecting frame is tightly arranged on the upper end of the first fixed tube (32).

5. The nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 4, characterized in that: Positioning grooves (31) are provided at the upper end of the box cover (17) and at positions corresponding to the travel wheels (16), and handles (30) are provided at the upper end of the box cover (17) and at positions corresponding to one side of the two brake plates (33).

6. The nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 1, characterized in that: A plurality of first support frames (14) are provided in the vacuum layer (13), and the first support frames (14) are fixedly connected to the outside of the inner box (11) and the inside of the outer box (12). A second support frame (15) is fixedly provided between the bottom end of the inner box (11) and the bottom end of the outer box (12).

7. The nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 1, characterized in that: A plurality of baffle bars (18) are fixedly arranged at equal intervals at the bottom end of the inner box (11), and the cross-section of the baffle bars (18) is triangular.

8. The nuclear pore membrane fresh-keeping box for fruit and vegetable distribution according to claim 1, characterized in that: The outer side of the snap-on cover (25) is provided with a plurality of arc-shaped grooves.

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