Freeze-dried product closed-loop production line with logistics conveying equipment

Abstract

The utility model belongs to the technical field of closed-loop production lines, and particularly relates to a freeze-dried product closed-loop production line with logistics conveying equipment, which comprises a charging tray loading process section and a charging tray unloading process section, and a freezing section and a vacuum drying section are sequentially connected between the charging tray loading process section and the charging tray unloading process section through a conveying line; the freezing section comprises a plurality of groups of freezing rooms which work alternately, the vacuum drying section comprises vacuum freeze-drying machines which correspond to the plurality of groups of freezing rooms and work alternately, and chain conveyors corresponding to the conveying lines are arranged in the freezing rooms and the vacuum freeze-drying machines; the intermittent vacuum freeze dryer effectively solves the problems that when an existing intermittent vacuum freeze dryer is used, feeding and discharging time is long, labor is large, labor intensity is high, and efficiency is not high.

Description

Technical Field

[0001] The utility model belongs to the technical field of closed-loop production lines, and in particular relates to a closed-loop production line for freeze-dried products with logistics conveying equipment. Background Art

[0002] Vacuum freeze drying is a drying technology that uses the principle of sublimation to dehydrate materials. After the material is quickly frozen, it is heated in a vacuum environment (below the triple point pressure of water) to allow the water in the material to sublime directly from solid to gas, thereby removing the water.

[0003] Vacuum freeze drying includes freezing process equipment and drying process equipment. Currently, vacuum freeze drying equipment for food is roughly divided into the following types according to the freezing position: integrated vacuum freeze dryer, split vacuum freeze dryer, etc. Freezing and drying are completed in the same equipment, which is an integrated vacuum freeze dryer. Freezing and drying are completed in different equipment, which is a split vacuum freeze dryer. The above two types of dryers are both intermittently operated and are collectively referred to as intermittent vacuum freeze dryers.

[0004] When loading and unloading materials in an intermittent vacuum freeze dryer, the current processing technology is as follows: the material rack containing the material runs on an overhead rail in the freezing room of a split vacuum freeze dryer, inside a vacuum freeze dryer, or in the drying chamber of an integrated vacuum freeze dryer. The material rack needs to be pushed in and out manually, which makes the existing intermittent vacuum freeze dryer have problems such as long loading and unloading time, high labor intensity, and low efficiency. For this reason, the present application proposes a closed-loop production line for freeze-dried products with logistics conveying equipment. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the existing technology, the utility model provides a closed-loop production line for freeze-dried products with logistics conveying equipment, which effectively solves the problems of the existing intermittent vacuum freeze dryers in use, such as long feeding and unloading time, high labor intensity and low efficiency.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a closed-loop production line for freeze-dried products with logistics conveying equipment, including a tray loading process section and a tray unloading process section, and the tray loading process section and the tray unloading process section are sequentially connected by a conveyor line with a freezing section and a vacuum drying section; the freezing section includes multiple groups of alternating freezing rooms, and the vacuum drying section includes multiple groups of alternating vacuum freeze dryers, and the freezing rooms and the vacuum freeze dryers are both provided with chain conveyors corresponding to the conveyor lines.

[0007] Furthermore, the tray loading process section includes a tray loading device, and the tray loading device is connected to an empty rack conveyor line and a tray conveyor line corresponding to the empty rack conveyor line.

[0008] Furthermore, the tray unloading process section includes a pre-unloading temporary storage room corresponding to the conveyor line, and the pre-unloading temporary storage room is provided with a pre-unloading temporary storage line corresponding to the conveyor line and the empty rack conveyor line; the pre-unloading temporary storage line is provided with a tray unloading device, the tray unloading device is connected to the dry product tray conveyor line, and the dry product tray conveyor line is connected to the dry product conveyor line.

[0009] Furthermore, the dry product tray conveyor line is also connected to an empty tray conveyor line, and the empty tray conveyor line is provided with a cleaning line for cleaning the empty trays.

[0010] Furthermore, the freezing room and the vacuum freeze dryer are both provided with a temperature sensing receiving device, and the freezing room and the vacuum freeze dryer are both provided with a plurality of sliding line receiving blocks connected to the temperature sensing receiving device, and the material rack is provided with a sliding head corresponding to the sliding line receiving block, and the sliding head is electrically connected to the temperature probe.

[0011] Furthermore, the vacuum freeze dryer is also provided with an online material weight loss detection device.

[0012] Furthermore, the plurality of vacuum freeze dryers each include a drying chamber shell, a chain conveyor is disposed in the drying chamber shell, and electric sliding doors are provided at both ends of the drying chamber shell.

[0013] Furthermore, the vacuum freeze dryer also includes a cold trap and a heating unit, the heating unit is connected to a heating plate arranged in the drying chamber shell; the cold trap is connected to a vacuum unit and a refrigeration system, and the cold trap is also connected to a vacuum pipe connected to the drying chamber shell.

[0014] Furthermore, the chain conveyor includes a support with adjustable height fixed to the drying bin shell, and a conveyor frame is provided on the support; the conveyor frame is provided with a pair of chains that convey the material rack in synchronous action, and a power motor is fixed to the drying bin shell, and the output end of the power motor is fixed with a pair of sprockets that respectively drive the movement of a pair of chains.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] When the utility model is in use, a plurality of freezing chambers and vacuum freeze dryers working alternately are used in conjunction with each other, so that the application can continuously freeze-dry large quantities of materials; in addition, by arranging chain conveyors in the freezing chamber and the vacuum freeze dryer, the material rack can be driven to be transported in the freezing chamber and the vacuum freeze dryer, and the feeding and discharging of materials do not require manual operation, thereby improving the degree of automation of the application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the drying chamber shell in the present invention;

[0019] Figure 3 This is a schematic structural diagram of the vacuum freeze dryer in the present invention;

[0020] Figure 4 This is a schematic diagram of the coordination of the drying chamber shell, electric sliding door, chain conveyor and other structures in the utility model;

[0021] In the figure: 1. Empty material rack conveyor line, 2. Material tray conveyor line, 3. Material tray loading device, 4. Freezing room, 5. Conveyor line, 6. Cold trap, 7. Vacuum freeze dryer, 8. Heating unit, 9. Empty material tray conveyor line, 10. Temporary storage room before unloading, 11. Material tray unloading device, 12. Dry product conveyor line, 13. Cleaning line, 14. Drying bin shell, 15. Vacuum pipe, 16. Vacuum unit, 17. Heating plate, 18. Material rack, 19. Sliding head, 20. Sliding line receiving block, 21. Electric sliding door, 22. Chain conveyor, 23. Material weight loss online detection device. DETAILED DESCRIPTION

[0022] A closed-loop production line for freeze-dried products with logistics conveying equipment, such as Figure 1-4 As shown, it includes a tray loading process section and a tray unloading process section. The tray loading process section and the tray unloading process section are sequentially connected with a freezing section and a vacuum drying section through a conveyor line 5; the freezing section includes a plurality of groups of alternating freezing rooms 4, and the vacuum drying section includes a plurality of alternating vacuum freeze dryers 7. The freezing rooms 4 and the vacuum freeze dryers 7 are both provided with a chain conveyor 22 corresponding to the conveyor line 5; the conveyor line 5 is equipped with a plurality of conveyors for placing and conveying material racks 18, a tilting conveyor, a lifting conveyor, a conveyor with a lifting platform, and a conveyor with a shuttle function.

[0023] When the utility model is in use, the material is automatically loaded and unloaded for freeze drying through the tray loading process section, freezing section, vacuum drying section, tray unloading process section and conveyor line 5; in addition, a plurality of alternately working freezing rooms 4 and vacuum freeze dryers 7 are used in conjunction with each other, so that the materials on a plurality of material racks 18 can simultaneously enter a freezing room 4 for freezing, and the frozen plurality of material racks 18 can simultaneously enter a vacuum freeze dryer 7 for vacuum drying, and by making the plurality of freezing rooms 4 and the plurality of vacuum freeze dryers 7 work alternately, the present application continuously freezes and dries the materials; in addition, by arranging a chain conveyor 22 in the freezing room 4 and the vacuum freeze dryer 7, the material racks 18 can be driven to be transported in the freezing room 4 and the vacuum freeze dryer 7, and no manual operation is required for feeding and discharging, thereby improving the degree of automation of the present application.

[0024] Furthermore, the tray loading process section includes a tray loading device 3, which is a prior art and will not be described in detail here. The tray loading device 3 is connected to an empty rack conveyor line 1 and a tray conveyor line 2 corresponding to the empty rack conveyor line 1; the empty rack conveyor line 1 conveys the empty rack 18 to the tray loading device 3, and the tray conveyor line 2 conveys trays filled with materials to the tray loading device 3, and the tray loading device 3 loads the trays filled with materials onto the empty rack 18.

[0025] Furthermore, the tray unloading process section includes a pre-unloading temporary storage room 10 corresponding to the conveyor line 5, and the pre-unloading temporary storage room 10 is provided with a pre-unloading temporary storage line corresponding to the conveyor line 5 and the empty material rack conveyor line 1; the pre-unloading temporary storage line is provided with a tray unloading device 11, and the tray unloading device 11 is a prior art and will not be described here. The tray unloading device 11 is connected to a dry product tray conveyor line, and the dry product tray conveyor line is connected to a dry product conveyor line 12; the dry product tray conveyor line is also connected to an empty tray conveyor line 9, and the empty tray conveyor line 9 is provided with a cleaning line 13 for cleaning the empty trays.

[0026] The freeze-dried material is conveyed to the temporary storage line before unloading through the conveyor line 5, and temporarily stored in the temporary storage room 10 before unloading to wait for unloading; under the action of the tray unloading device 11, the dried tray is unloaded onto the dry product tray conveyor line, and the empty material rack enters the empty material rack conveyor line 1, and is conveyed to the tray loading station under the action of the empty material rack conveyor line 1; the dry material is transferred to the dry product conveyor line 12 by manual or tray-material separation device, and enters the dry product packaging process. The empty tray enters the cleaning line 13 via the empty tray conveyor line 9, and then enters the tray loading process.

[0027] Furthermore, both the freezing chamber 4 and the vacuum freeze dryer 7 are equipped with temperature sensing devices. Each of these devices is equipped with multiple sliding line receiving blocks 20 connected to the temperature sensing devices. The material rack 18 is provided with a sliding head 19 corresponding to the sliding line receiving blocks 20, and the sliding head 19 is electrically connected to a temperature probe. The temperature probe detects the temperature of the material, which is then transmitted to the sliding line receiving block 20 via the sliding head 19. The sliding line receiving block 20 then transmits the temperature to the temperature sensing device, thereby achieving temperature detection during the freeze-drying process of the material.

[0028] Furthermore, the vacuum freeze dryer 7 is also provided with an online material weight loss detection device 23; the online material weight loss detection device 23 can realize weighing detection for one or more, or all, material racks 18; in addition, as the drying progresses, the weight of the material is constantly decreasing, and the data of the online material weight loss detection device 23 is recorded and analyzed based on basic data such as the original moisture content of the raw material to determine the degree of dryness of the material.

[0029] Furthermore, a plurality of the freezing rooms 4 are each provided with a plurality of air coolers, the air coolers are provided with refrigerant by the refrigeration equipment and are connected to the refrigeration equipment through a cold exhaust pipe; the plurality of the vacuum freeze dryers 7 each include a drying bin shell 14, a chain conveyor 22 is arranged in the drying bin shell 14, and electric sliding doors 21 are provided at both ends of the drying bin shell 14.

[0030] Furthermore, the vacuum freeze dryer 7 also includes a cold trap 6 and a heating unit 8, the heating unit 8 is connected to a heating plate 17 provided in the drying chamber shell 14; the cold trap 6 is connected to a vacuum unit 16 and a refrigeration system, and the cold trap 6 is also connected to a vacuum pipe 15 connected to the drying chamber shell 14.

[0031] When the material is drying, the vacuum unit 16 evacuates the drying chamber shell 14 through the cold trap 6 and the vacuum pipe 15, and heats the material in the drying chamber shell 14 through the heating unit 8 and the heating plate 17. The water vapor sublimated from the material enters the cold trap 6, is captured as frost, and freezes on the surface of the cold trap 6 pipe, gradually accumulating. A small amount of uncaptured water vapor and leaked air are extracted by the vacuum system and discharged into the atmosphere. After drying, the cold trap 6 undergoes a defrost process, and the frost layer on the cold trap 6 pipe is melted and discharged into water through the defrost water discharge system.

[0032] Furthermore, the chain conveyor 22 includes a support with adjustable height fixed to the drying bin shell 14, and a conveying frame is provided on the support; the conveying frame is provided with a pair of chains that convey the material rack 18 in synchronous action, and a power motor is fixed to the drying bin shell 14, and the output end of the power motor is fixed with a pair of sprockets that respectively drive a pair of the chains to move, and the power motor transmits power to the sprocket through the power shaft through the rotating seal; the power motor drives the chain to move through the sprocket, and the chain drives the material rack 18 to be transported in the freezing room 4 and the vacuum freeze dryer 7.

[0033] The working process of this utility model is:

[0034] The empty racks 18 are transported through the empty rack conveyor line 1. After the empty racks 18 enter the tray loading station, the tray containing the material is loaded onto the racks 18 through the tray loading device 3. After each rack 18 is loaded, the conveyor line 5 transports the rack 18 to the door of the freezing room 4. The door of the freezing room 4 is opened, and the chain conveyor 22 in the freezing room 4 is linked with the conveyor line 5 to transport the rack 18 into the freezing room 4. Then the door of the freezing room 4 is closed, waiting for the next rack 18 to enter the warehouse, until the number of racks 18 entering the freezing room 4 reaches the instructed number. The freezing room 4 works to make the material enter the freezing process until the technical requirements (material freezing temperature and freezing time) are met.

[0035] When the material temperature reaches the design parameters and the material also reaches the design requirements of freezing time, the material freezing process in freezing room 4 is completed, and the material is waiting to be discharged; when one of the vacuum freeze-drying machines 7 can be fed, the discharge door of the freezing room 4 is opened, and the chain conveyor 22 in the freezing room 4 is linked with the conveying line 5 to convey the trolleys 18 out of the freezing room 4 one by one.

[0036] The trolleys 18 enter the door of the vacuum freeze-drying machine 7 under the action of the conveying line 5, the door of the vacuum freeze-drying machine 7 is opened, the chain conveyor 22 in the vacuum freeze-drying machine 7 is linked with the conveying line 5 to make the trolleys 18 enter the vacuum freeze-drying machine 7 one by one; after the trolleys 18 are fed, the vacuum freeze-drying machine 7 performs drying treatment on the material on the trolleys 18; after the material is dried, the trolleys 18 are conveyed to the unloading front temporary storage room 10 through the conveying line 5, and are waiting to be unloaded.

[0037] The trolleys 18 entering the unloading station are unloaded to the dry product tray conveying line under the action of the tray unloading device 11, the empty trolleys 18 enter the empty trolley conveying line 1 and are conveyed to the tray loading station under the action of the empty trolley conveying line 1; the dry product material is transferred to the dry product conveying line 12 by manual or tray separation device, enters the material dry product packaging process, the empty tray enters the cleaning line 13 through the empty tray conveying line 9, and then enters the tray loading process.

Claims

1. A closed-loop production line for freeze-dried products with a logistics conveying device, characterized by: The process comprises a tray loading process section and a tray unloading process section, wherein a freezing section and a vacuum drying section are sequentially connected between the tray loading process section and the tray unloading process section via a conveyor line (5); the freezing section comprises a plurality of groups of alternately working freezing rooms (4), and the vacuum drying section comprises a plurality of alternately working vacuum freeze dryers (7), and the freezing rooms (4) and the vacuum freeze dryers (7) are both provided with a chain conveyor (22) corresponding to the conveyor line (5).

2. The closed-loop production line for freeze-dried products with a logistics conveying device according to claim 1, characterized in that: The tray loading process section comprises a tray loading device (3), to which an empty rack conveyor line (1) and a tray conveyor line (2) corresponding to the empty rack conveyor line (1) are connected.

3. The closed-loop production line for freeze-dried products with a logistics conveying device according to claim 1, characterized in that: The tray unloading process section includes a pre-unloading temporary storage room (10) corresponding to the conveyor line (5), and a pre-unloading temporary storage line corresponding to the conveyor line (5) and the empty rack conveyor line (1) is provided in the pre-unloading temporary storage room (10); a tray unloading device (11) is provided on the pre-unloading temporary storage line, and the tray unloading device (11) is connected to a dry product tray conveyor line, and the dry product tray conveyor line is connected to a dry product conveyor line (12).

4. The closed-loop production line for freeze-dried products with a logistics conveying device according to claim 3, characterized in that: The dry product tray conveyor line is also connected to an empty tray conveyor line (9), and the empty tray conveyor line (9) is provided with a cleaning line (13) for cleaning the empty trays.

5. The closed-loop production line for freeze-dried products with a logistics conveying device according to claim 1, characterized in that: The freezing chamber (4) and the vacuum freeze dryer (7) are both provided with a temperature sensing receiving device, and the freezing chamber (4) and the vacuum freeze dryer (7) are both provided with a plurality of sliding wire receiving blocks (20) connected to the temperature sensing receiving device, and the material rack (18) is provided with a sliding head (19) corresponding to the sliding wire receiving block (20), and the sliding head (19) is electrically connected to a temperature probe.

6. The closed-loop production line for freeze-dried products with a logistics conveying device according to any one of claims 1 or 5, characterized in that: The vacuum freeze dryer (7) is also provided with a material weight loss online detection device (23).

7. The closed-loop production line for freeze-dried products with a logistics conveying device according to claim 1, characterized in that: The plurality of vacuum freeze dryers (7) each include a drying chamber shell (14), a chain conveyor (22) disposed within the drying chamber shell (14), and electric sliding doors (21) disposed at both ends of the drying chamber shell (14).

8. The closed-loop production line for freeze-dried products with a logistics conveying device according to claim 7, characterized in that: The vacuum freeze dryer (7) further comprises a cold trap (6) and a heating unit (8), wherein the heating unit (8) is connected to a heating plate (17) disposed in a drying chamber shell (14); the cold trap (6) is connected to a vacuum unit (16) and a refrigeration system, and the cold trap (6) is further connected to a vacuum pipe (15) connected to the drying chamber shell (14).

9. The closed-loop production line for freeze-dried products with a logistics conveying device according to any one of claims 7 or 8, characterized in that: The chain conveyor (22) includes a support fixedly connected to the drying bin housing (14) with an adjustable height, and a conveyor frame is provided on the support; the conveyor frame is provided with a pair of chains for synchronously conveying the material rack (18), and a power motor is fixedly connected to the drying bin housing (14), and the output end of the power motor is fixedly connected to a pair of sprockets for respectively driving the pair of chains to move.

Images