CN112429380B

CN112429380B - Improvement formula vegetables conveyer

Info

Publication number: CN112429380B
Application number: CN202011335866.XA
Authority: CN
Inventors: 梁勇生; 黄杏
Original assignee: Nanning Institute Of Agricultural Sciences
Current assignee: Nanning Institute Of Agricultural Sciences
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2022-07-29
Anticipated expiration: 2040-11-25
Also published as: CN112429380A

Abstract

The invention belongs to the technical field of vegetable transportation, and particularly relates to an improved vegetable transportation device which comprises a transportation box body, a placing rack, a fresh-keeping box and a circulating spraying mechanism, wherein the placing rack is arranged in the transportation box body, a plurality of placing cavities are formed in the placing rack, the fresh-keeping box is inserted into the placing cavities, the circulating spraying mechanism comprises a water storage box, two groups of water outlet assemblies and two groups of water discharging assemblies, each water outlet assembly comprises a water pump, a water outlet pipe, a water guide pipe and a plurality of spraying pipes, the water pump is arranged in the water storage box, the water outlet pipes are connected with the water pump and the placing cavities at the top, the water guide pipes are connected with the water outlet pipes, the spraying pipes are connected with the water guide pipes, each water discharging assembly comprises a main water discharging pipe and a plurality of branch water discharging pipes, the branch water discharging pipes are connected with a main water discharging pipe, and the main water discharging pipe is connected with the water storage box. The vegetable preservation box can ensure that vegetables cannot be mutually extruded to cause damage and breakage of vegetable leaves in the transportation process, can timely replenish water to the vegetables to prevent the vegetables from rotting, and has a good preservation effect.

Description

Improvement formula vegetables conveyer

Technical Field

The invention belongs to the technical field of vegetable transportation, and particularly relates to an improved vegetable transportation device.

Background

Vegetables belong to fresh food, are easy to rot and deteriorate after being harvested, and in order to prolong the shelf life, people develop various auxiliary fresh-keeping equipment, preparations and the like, strive to ensure the freshness of the vegetables and convey the vegetables to vegetable markets and supermarkets for people to select and purchase the vegetables, so that the transportation of the freshness, quality guarantee and integrity of the vegetables is an important link, and the quality of auxiliary measures plays a decisive role in the quality of the vegetables transported to the markets and supermarkets.

Because vegetables are picked from a vegetable garden and are far away from consumers, the vegetables need to be transported for a long time, the vegetables (such as pakchoi, Shanghai green vegetables, lettuce and the like) are often mutually extruded due to improper packaging in the transportation process, so that vegetable leaves are damaged and broken, even the vegetables are rotten due to the fact that moisture cannot be timely supplemented for the transported vegetables in the long-time transportation process, the quality of the vegetables is influenced, and the vegetables are not beneficial to human health after being eaten.

Disclosure of Invention

The invention aims to solve the technical problems and provides an improved vegetable transportation device which mainly solves the technical problems that vegetable leaves are damaged and broken due to frequent mutual extrusion caused by improper packaging in the vegetable transportation process, and even vegetables are rotten due to the fact that moisture cannot be timely supplemented to the transported vegetables in long-time transportation.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an improvement formula vegetables conveyer, sprays the mechanism including transport box, rack, fresh-keeping case and the circulation that is equipped with the closed door, the rack is established in the transport box, the rack divide into a left side and places the district and place the district on the right side, a left side is placed the district and cut apart into a plurality of by a plurality of horizontal separators and a plurality of vertical baffle with the right side and place the chamber, each place the intracavity and insert and be equipped with one fresh-keeping case.

The circulating spray mechanism comprises a water storage tank, two groups of water outlet assemblies and two groups of water drainage assemblies, each water outlet assembly comprises a water pump, a water outlet pipe, a water guide pipe and a plurality of spray pipes, the water pump is arranged in the water storage tank, one end of each water outlet pipe is connected with the water pump, the other end of each water outlet pipe winds to the top of the transportation tank from the rear of the transportation tank and penetrates downwards to the placing cavity at the top, one end of each water guide pipe is communicated with the water outlet pipe, the other end of each water guide pipe penetrates downwards through the vertical partition plate and extends to the upper part of the placing cavity at the bottom, one end of each spray pipe of one group of water outlet assemblies is connected with the water guide pipe, the other end of each spray pipe of the other group of water outlet assemblies extends to each placing cavity in the left placing area, one end of each spray pipe of the other group of water outlet assemblies is connected with the water guide pipe, and the other end of each spray pipe of the other group of the other water outlet assemblies extends to each placing cavity in the right placing area, the water outlet pipe and the plurality of spray pipes are positioned at one ends of the placing cavities and are all connected with water spray heads in a threaded manner.

The drainage assembly comprises a main drainage pipe and a plurality of branch drainage pipes, a water outlet is formed in the bottom of each fresh-keeping box, one end of each branch drainage pipe is connected with the water outlet, the other end of each branch drainage pipe penetrates through the transportation box body to be connected with the main drainage pipe, and one end, far away from the branch drainage pipe, of the main drainage pipe is connected with the water storage tank.

Preferably, still include controller and temperature and humidity sensor, the controller is fixed to be established on the lateral wall of transport box, temperature and humidity sensor is fixed to be established on the inside wall of transport box, the water pump with temperature and humidity sensor all with controller electric connection.

Preferably, a fixture block is rotatably connected to the transverse partition plate in front of each placing cavity.

Preferably, the fresh-keeping box comprises a fresh-keeping outer box and a fresh-keeping inner box, the top and the bottom of the fresh-keeping outer box are respectively provided with an opening and the water outlet, the middle inside the fresh-keeping outer box is provided with a separation net, the fresh-keeping inner box is arranged on the separation net, the top and the bottom of the fresh-keeping inner box are respectively provided with an opening and a plurality of overflow holes, a hollow area between the outer wall of the fresh-keeping inner box and the inner wall of the fresh-keeping outer box is a buffer layer, the outer walls of two opposite sides of the fresh-keeping inner box are vertically and fixedly provided with a slide block, two buffer devices are arranged in the buffer layer, each buffer device comprises a U-shaped slide groove, two springs, a connecting rod, a limiting sleeve, a rotating nut and a clamping block, each slide block is respectively inserted in the U-shaped slide groove in one buffer device and is in sliding connection with the U-shaped slide groove, the two springs are respectively arranged at the upper part and the lower part of the U-shaped slide groove, just the one end of spring is fixed to be established on the U type spout lateral wall, and the other end is fixed to be established on the fresh-keeping outer container inner wall, spacing sleeve is fixed to be established on the fresh-keeping outer container outer wall, just mutually perpendicular's perpendicular groove and cross slot have been seted up on the spacing sleeve, the degree of depth of erecting the groove is greater than the degree of depth of cross slot is located two be equipped with between the spring the connecting rod, the one end of connecting rod is fixed to be established on the U type spout lateral wall, the other end passes fresh-keeping outer container and spacing sleeve and with swivel nut threaded connection, swivel nut keeps away from the one end of connecting rod is fixed to be equipped with the fixture block, the fixture block card is established on perpendicular groove or the cross slot.

Preferably, the fresh-keeping outer box is further provided with a cover assembly, the cover assembly comprises a U-shaped placing groove and a cover plate, the U-shaped placing groove is vertically and fixedly arranged on the outer side wall of the fresh-keeping outer box, sliding grooves are formed in two opposite side walls of the U-shaped placing groove, sliding columns are formed in two opposite side walls of one end of the cover plate, and the cover plate is slidably arranged in the sliding grooves and is connected with the U-shaped placing groove in a sliding mode through the sliding columns.

Preferably, a handle is arranged on the outer wall of the front side of the fresh-keeping outer box.

Preferably, a plurality of preservation grids are arranged in the preservation inner box and are formed by vertically crossing a plurality of transverse rib plates and a plurality of vertical rib plates.

Preferably, the height of the inner fresh-keeping box is lower than the distance from the separation net to the top of the outer fresh-keeping box, and a catching groove is formed in the outer wall of the inner fresh-keeping box.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the invention provides an improved vegetable transportation device which is simple in structure and ingenious in design, a circulating spraying mechanism can circularly spray moisture to vegetables through a water nozzle, so that the vegetables can be timely supplemented with moisture and kept fresh, water in a water storage tank can be recycled, energy is saved, the environment is protected, and spreading waste is avoided; the temperature and humidity sensor detects the temperature and humidity information in the transport case and feeds the information back to the controller, and the water pump is automatically controlled by the controller to supplement water to vegetables in the fresh-keeping case in time, so that the purposes of temperature reduction and water supplement are achieved.

2. According to the vegetable preservation box, the limiting block which is connected with the transverse partition plate in a rotating mode in front of the placing cavity can clamp the preservation box in the placing cavity, so that vegetables are prevented from bumping and falling in the transportation process, and the effect of protecting the preservation box is achieved; fresh-keeping case divide into fresh-keeping outer container and fresh-keeping inner box, carries out duplicate protection to vegetables, and fresh-keeping inner box passes through buffer to be installed in fresh-keeping outer container, thereby avoids placing the vegetables of fresh-keeping inner box and extrudees each other in the transportation and cause the damaged rupture of vegetables dish leaf, the integrality of protection vegetables.

3. The covering assembly on the fresh-keeping outer box plays a role in sealing the fresh-keeping box, and meanwhile, when the fresh-keeping box is conveniently placed in the placing cavity, the cover plate slides to the bottom of the sliding groove through the sliding column so as to be recovered in the U-shaped placing groove, so that the vegetables in the fresh-keeping inner box can absorb the moisture from the spraying pipe, and the effect of keeping the vegetables fresh is achieved; the plurality of preservation grids arranged in the inner preservation box facilitate the classified refrigeration and preservation of different types of vegetables, and the workload of later-stage sorting is simplified; the catching groove on the outer wall of the fresh-keeping inner box makes things convenient for operating personnel to pull out the fresh-keeping outer box from the fresh-keeping inner box, accomplishes the dismantlement, and the peculiar smell is got rid of to convenient dismantlement washing of fresh-keeping outer box and fresh-keeping inner box.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of the present invention;

FIG. 3 is a left side sectional view of the present invention;

FIG. 4 is a rear sectional view of the present invention;

FIG. 5 is a top view of the crisper of the present invention;

FIG. 6 is a front sectional view of the fresh food box of the present invention;

FIG. 7 is an enlarged sectional view taken at A of FIG. 5;

FIG. 8 is a schematic view of the installation of the spring of the present invention;

FIG. 9 is a schematic structural view of a spacing sleeve according to the present invention;

FIG. 10 is a schematic view of the closure assembly of the present invention;

FIG. 11 is a block diagram of the circuit configuration of the present invention;

the main reference symbols in the drawings are as follows:

1. transporting the box body; 2. placing a rack; 21. a transverse partition; 22. a vertical partition plate; 3. a fresh-keeping box; 31. a water outlet; 32. fresh-keeping outer boxes; 321. separating the net; 322. a handle; 33. an inner fresh-keeping box; 331. a slider; 332. a preservation grid; 34. a U-shaped placing groove; 341. a chute; 35. a cover plate; 351. a traveler; 4. a circulating spraying mechanism; 41. a water storage tank; 42. a water pump; 43. a water outlet pipe; 44. a water conduit; 45. a shower pipe; 46. a water spray head; 47. a main drain pipe; 48. water drainage branch pipes; 5. a controller; 6. A temperature and humidity sensor; 7. a buffer device; 71. a U-shaped chute; 72. a spring; 73. a connecting rod; 74. a limiting sleeve; 741. A vertical slot; 742. a transverse groove; 75. rotating the nut; 76. a clamping block; 8. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 to 11, an improvement formula vegetables conveyer, including the transportation box 1 that is equipped with the closed door, rack 2, fresh-keeping case 3 sprays mechanism 4 with the circulation, rack 2 establishes in transportation box 1, rack 2 divide into a left side and places the district and place the district on the right side, a left side is placed the district and is cut apart into a plurality of by a plurality of transverse partition 21 and a plurality of vertical partition 22 and place the chamber with the right side, each is placed the intracavity and is inserted and be equipped with a fresh-keeping case 3, it is concrete, each is placed the equal rotation in chamber the place ahead and is connected with stopper 8 on transverse partition 21, it blocks fresh-keeping case 3 to rotate stopper 8, can prevent that vegetables from jolting and falling in the transportation way, play the effect of protection fresh-keeping case 3. As shown in fig. 1 to 4, the circulating spray mechanism 4 includes a water storage tank 41, two sets of water outlet assemblies and two sets of water drainage assemblies, each water outlet assembly includes a water pump 42, a water outlet pipe 43, a water guide pipe 44 and a plurality of spray pipes 45, the water pump 42 is arranged inside the water storage tank 41, one end of the water outlet pipe 43 is connected with the water pump 42, the other end of the water outlet pipe 43 winds around the top of the transportation tank 1 from the rear of the transportation tank 1 and penetrates downwards into the placing cavity at the top, one end of the water guide pipe 44 is communicated with the water outlet pipe 43, the other end of the water guide pipe 44 penetrates downwards through the vertical partition plate 22 and extends to the upper part of the placing cavity at the bottom, one end of the plurality of spray pipes 45 of one set of water outlet assembly is connected with the water guide pipe 44, the other end of the plurality of spray pipes 45 of the other set of water outlet assembly extends into each placing cavity of the left placing area respectively, the water outlet pipe 43 and the one ends of the plurality of spray pipes 45 in the placing cavity are all in threaded connection with the water spray head 46, the water discharging assembly comprises a main water discharging pipe 47 and a plurality of branch water discharging pipes 48, the bottom of each fresh-keeping box 3 is provided with a water outlet 31, one ends of the plurality of branch water discharging pipes 48 are respectively connected with one water outlet 31, the other ends of the plurality of branch water discharging pipes pass through the transportation box body 1 and are connected with the main water discharging pipe 47, and one end, far away from the branch water discharging pipes 48, of the main water discharging pipe 47 is connected with the water storage box 41. The circulating spraying mechanism 4 can circularly spray moisture for vegetables through the water spray head 46, so that the vegetables can be timely supplemented with moisture to keep fresh, water in the water storage tank 41 can be recycled, and the energy is saved, the environment is protected, and the spreading waste is avoided.

In this embodiment, the invention further comprises a controller 5 and a temperature and humidity sensor 6, the controller 5 is fixedly arranged on the outer side wall of the transportation box body 1, the temperature and humidity sensor 6 is fixedly arranged on the inner side wall of the transportation box body 1, and the water pump 42 and the temperature and humidity sensor 6 are both electrically connected with the controller 5. The temperature and humidity sensor 6 detects the temperature and humidity in the transportation box body 1 and feeds information back to the controller 5, the water pump 42 is automatically controlled by the controller 5 to supplement water to the vegetables in the preservation box 3 in time, and the purposes of temperature reduction and water supplement are achieved. As shown in fig. 1 to 10, fresh-keeping case 3 includes fresh-keeping outer container 32 and fresh-keeping inner box 33, opening and outlet 31 have been seted up respectively to fresh-keeping outer container 32 top and bottom, be equipped with in the middle of fresh-keeping outer container 32 is inside and separate net 321, fresh-keeping inner box 33 is established on separating net 321, opening and a plurality of overflow hole have been seted up respectively to fresh-keeping inner box 33 top and bottom, the fretwork region between fresh-keeping inner box 33 outer wall and the fresh-keeping outer container 32 inner wall is the buffer layer, equal vertical fixed slider 331 that is equipped with on the relative both sides outer wall of fresh-keeping inner box 33, be equipped with two buffer 7 in the buffer layer. Fresh-keeping case 3 divide into fresh-keeping outer container 32 and fresh-keeping inner box 33, carries out duplicate protection to vegetables, and fresh-keeping inner box 33 passes through buffer 7 to be installed in fresh-keeping outer container 32, thereby avoids placing the vegetables at fresh-keeping inner box 33 and extrudees each other in the transportation and causes the damaged rupture of vegetables dish leaf, the integrality of protection vegetables.

As shown in fig. 5 to 9, the buffer device 7 includes a U-shaped sliding slot 71, two springs 72, a connecting rod 73, a limiting sleeve 74, a rotating nut 75 and a latch 76, each slider 331 is inserted into the U-shaped sliding slot 71 of one buffer device 7 and is slidably connected with the U-shaped sliding slot 71, the two springs 72 are respectively disposed on the upper portion and the lower portion of the U-shaped sliding slot 71, one end of each spring 72 is fixedly disposed on the outer side wall of the U-shaped sliding slot 71, the other end of each spring is fixedly disposed on the inner wall of the fresh-keeping outer box 32, the limiting sleeve 74 is fixedly disposed on the outer wall of the fresh-keeping outer box 32, the limiting sleeve 74 is provided with a vertical slot 741 and a horizontal slot 742 perpendicular to each other, the vertical slot 741 is deeper than the horizontal slot 742, the connecting rod 73 is disposed between the two springs 72, one end of the connecting rod 73 is fixedly disposed on the outer side wall of the U-shaped sliding slot 71, and the other end of the connecting rod 73 passes through the fresh-keeping outer box 32 and the limiting sleeve 74 and is threadedly connected with the rotating nut 75, a latch 76 is fixedly disposed at an end of the rotating nut 75 away from the connecting rod 73, and the latch 76 is latched on the vertical slot 741 or the horizontal slot 742. When the inner fresh-keeping box 33 needs to be installed in the outer fresh-keeping box 32, the connecting rod 73 is pulled outwards through the fixture block 76, so that the spring is contracted, the rotating fixture block 76 is clamped in the transverse groove 742 of the limiting sleeve 74 to fix the buffer device 7, and at the moment, the inner fresh-keeping box 33 is inserted in the U-shaped sliding groove 71 through the sliding block 331; when the inner fresh-keeping box 33 needs to be fixed, the rotating fixture 76 is clamped in the vertical groove 741 of the limiting sleeve 74, and at the moment, the spring 72 extends to press the U-shaped chute 71 against the inner fresh-keeping box 33.

In this embodiment, as shown in fig. 10, the fresh-keeping outer box 32 is further provided with a covering assembly, the covering assembly comprises a U-shaped placing groove 34 and a cover plate 35, the U-shaped placing groove 34 is vertically fixed on the outer side wall of the fresh-keeping outer box 32, two opposite side walls of the U-shaped placing groove 34 are respectively provided with a sliding groove 341, two opposite side walls of one end of the cover plate 35 are respectively provided with a sliding column 351, and the cover plate 35 is slidably arranged in the sliding groove 341 through the sliding column 351 and is slidably connected with the U-shaped placing groove 34. The lid closes the subassembly and plays the effect of sealing fresh-keeping case 3, and convenient when putting into fresh-keeping case 3 and placing the intracavity simultaneously, thereby apron 35 slides to spout 341 bottom through traveller 351 and opens apron 5 and retrieve apron 35 in U type standing groove 34 to make the vegetables in the fresh-keeping inner box 33 can draw the moisture that shower 45 came out, reach the fresh-keeping effect of vegetables. A handle 322 is arranged on the outer wall of the front side of the fresh-keeping outer box 32. The handle 322 is used to pull out or push back the fresh outer box 32 into the cavity. As shown in fig. 5, a plurality of fresh-keeping lattices 332 are arranged in the fresh-keeping inner box 33, and the plurality of fresh-keeping lattices 332 are formed by vertically crossing a plurality of transverse rib plates and a plurality of vertical rib plates. The fresh-keeping check 332 is convenient for classifying, refrigerating and keeping fresh for different kinds of vegetables, and the workload of later-period sorting is simplified. Fresh-keeping inner box 33 highly be less than at a distance between net 321 to fresh-keeping outer container 32 top, and be equipped with the catching groove on the outer wall of fresh-keeping inner box 33, the catching groove makes things convenient for operating personnel to pull out fresh-keeping outer container 32 with fresh-keeping inner box 33, accomplishes the dismantlement, conveniently dismantles the washing to fresh-keeping outer container 32 and fresh-keeping inner box 33, gets rid of the peculiar smell.

The controller, the temperature and humidity sensor, the water pump and other electrical equipment and components provided in the embodiment are conventional equipment on the market, and the connection relationship and the operation and use of the equipment and components are methods on the market.

The working principle of the invention is as follows: the cover plate 35 is opened, the vegetables to be transported are placed in the preservation grids 332 of the inner preservation box 33, the inner preservation box 33 is inserted into the outer preservation box 32, the whole preservation box 3 is placed in the placing cavity of the placing frame 2, and the limiting block 8 is rotated to clamp the preservation box 3; the temperature and humidity sensor 6 automatically transports temperature and humidity information in the box body 1, when the temperature in the box body 1 exceeds 15 ℃ or the relative humidity of air is less than 75%, the temperature and humidity sensor 6 feeds the information back to the controller 5, the controller 5 automatically controls the water pump 42 to pump water into the water outlet pipe 43, the water guide pipe 44 and the spray pipe 45, and the water is sprayed into vegetables in the inner preservation box 33 through the water spray head 46, so that the preservation effect is achieved; the water flows into the water discharge branch pipe 48 through the overflow hole of the fresh-keeping inner box 33, the partition net 321 and the water discharge port 31 in sequence, and finally is collected into the water discharge main pipe 47 to be guided back into the water storage tank 41, so that the aim of recycling is fulfilled.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.

Claims

1. An improved vegetable transportation device is characterized by comprising a transportation box body (1) with a closed door, a placing rack (2), fresh-keeping boxes (3) and a circulating spraying mechanism (4), wherein the placing rack (2) is arranged in the transportation box body (1), the placing rack (2) is divided into a left placing area and a right placing area, the left placing area and the right placing area are divided into a plurality of placing cavities by a plurality of transverse partition plates (21) and a plurality of vertical partition plates (22), one fresh-keeping box (3) is inserted into each placing cavity,

the circulating spray mechanism (4) comprises a water storage tank (41), two groups of water outlet assemblies and two groups of water drainage assemblies, each water outlet assembly comprises a water pump (42), a water outlet pipe (43), a water guide pipe (44) and a plurality of spray pipes (45), the water pump (42) is arranged in the water storage tank (41), one end of each water outlet pipe (43) is connected with the water pump (42), the other end of each water outlet pipe is wound to the top of the transportation box body (1) from the rear part of the transportation box body (1) and downwards penetrates into the placement cavity positioned at the top, one end of each water guide pipe (44) is communicated with the corresponding water outlet pipe (43), the other end of each water outlet pipe downwards penetrates through the vertical partition plate (22) and extends to the top of the placement cavity at the bottom, one end of each group of the plurality of spray pipes (45) of each water outlet assembly is connected with the corresponding water guide pipe (44), and the other end of each water outlet assembly respectively extends to the left placement cavity, one end of a plurality of spray pipes (45) of the other group of the water outlet components is connected with the water guide pipe (44), the other end of the spray pipes respectively extends into each placing cavity in the right placing area, one end of the water outlet pipe (43) and one end of the plurality of spray pipes (45) in the placing cavities are both in threaded connection with a water spray head (46),

The drainage assembly comprises a main drainage pipe (47) and a plurality of branch drainage pipes (48), the bottom of each fresh-keeping box (3) is provided with a drainage port (31), one end of each branch drainage pipe (48) is connected with one drainage port (31), the other end of each branch drainage pipe penetrates through the transportation box body (1) to be connected with the main drainage pipe (47), and one end, far away from the branch drainage pipes (48), of the main drainage pipe (47) is connected with the water storage box (41);

the fresh-keeping box (3) comprises a fresh-keeping outer box (32) and a fresh-keeping inner box (33), the top and the bottom of the fresh-keeping outer box (32) are respectively provided with an opening and the water outlet (31), a separation net (321) is arranged in the middle of the inside of the fresh-keeping outer box (32), the fresh-keeping inner box (33) is arranged on the separation net (321), the top and the bottom of the fresh-keeping inner box (33) are respectively provided with an opening and a plurality of overflow holes, a hollow area between the outer wall of the fresh-keeping inner box (33) and the inner wall of the fresh-keeping outer box (32) is a buffer layer, sliding blocks (331) are vertically and fixedly arranged on the outer walls of two opposite sides of the fresh-keeping inner box (33), two buffer devices (7) are arranged in the buffer layer, each buffer device (7) comprises a U-shaped sliding groove (71), two springs (72), a connecting rod (73), a limiting sleeve (74), a rotating nut (75) and a clamping block (76), each sliding block (331) is respectively inserted into a U-shaped sliding groove (71) in one buffer device (7) and is in sliding connection with the U-shaped sliding groove (71), two springs (72) are respectively arranged at the upper part and the lower part of the U-shaped sliding groove (71), one end of each spring (72) is fixedly arranged on the outer side wall of the U-shaped sliding groove (71), the other end of each spring is fixedly arranged on the inner wall of the fresh-keeping outer box (32), a limiting sleeve (74) is fixedly arranged on the outer wall of the fresh-keeping outer box (32), a vertical groove (741) and a transverse groove (742) which are perpendicular to each other are arranged on the limiting sleeve (74), the depth of the vertical groove (741) is larger than that of the transverse groove (742), a connecting rod (73) is arranged between the two springs (72), and one end of the connecting rod (73) is fixedly arranged on the outer side wall of the U-shaped sliding groove (71), the other end of the fresh-keeping box penetrates through the fresh-keeping outer box (32) and the limiting sleeve (74) and is in threaded connection with the rotating nut (75), one end, far away from the connecting rod (73), of the rotating nut (75) is fixedly provided with the clamping block (76), and the clamping block (76) is clamped on the vertical groove (741) or the transverse groove (742).

2. An improved vegetable transportation device as claimed in claim 1, further comprising a controller (5) and a temperature and humidity sensor (6), wherein the controller (5) is fixedly arranged on an outer side wall of the transportation box body (1), the temperature and humidity sensor (6) is fixedly arranged on an inner side wall of the transportation box body (1), and the water pump (42) and the temperature and humidity sensor (6) are electrically connected to the controller (5).

3. An improved vegetable transportation device as defined in claim 1, wherein a latch (76) is rotatably connected to said transverse partition (21) in front of each of said placement chambers.

4. An improved vegetable transportation device as claimed in claim 1, wherein the fresh-keeping outer box (32) is further provided with a covering component, the covering component comprises a U-shaped placing groove (34) and a cover plate (35), the U-shaped placing groove (34) is vertically fixed on the outer side wall of the fresh-keeping outer box (32), two opposite side walls of the U-shaped placing groove (34) are respectively provided with a sliding groove (341), two opposite side walls of one end of the cover plate (35) are respectively provided with a sliding column (351), and the cover plate (35) is slidably arranged in the sliding groove (341) and is slidably connected with the U-shaped placing groove (34) through the sliding column (351).

5. The improved vegetable transportation device as claimed in claim 1, characterized in that a handle (322) is provided on the outer wall of the front side of the fresh food outer case (32).

6. An improved vegetable transportation device as defined in claim 1, wherein a plurality of fresh-keeping compartments (332) are provided in said fresh-keeping inner box (33), and said plurality of fresh-keeping compartments (332) are formed by vertically crossing a plurality of transverse rib plates and a plurality of vertical rib plates.

7. An improved vegetable transportation device as claimed in claim 1, characterized in that the height of the inner fresh food box (33) is lower than the distance from the screen (321) to the top of the outer fresh food box (32), and the outer wall of the inner fresh food box (33) is provided with a groove.