CN219141266U - Continuous freeze-drying system - Google Patents

Abstract

The utility model discloses a continuous freeze-drying system, which comprises a freezing area for freezing materials, a loading station for placing a tray filled with the frozen materials into transportation equipment, a drying bin for drying the materials, a discharging area and a conveying track, wherein the conveying track penetrates through the drying bin, the drying bin comprises a drying area for installing a drying plate layer and buffer areas arranged at two ends of the drying area, a partition plate capable of separating the two areas is arranged between the buffer areas and the drying area, and the transportation equipment can move along the conveying track; according to the utility model, the material processed by the freezing area is loaded on the movable conveying equipment, and the movable conveying equipment moves along the conveying track, so that the drying operation of the drying area can be realized without suspension under the cooperation of the buffer area and the drying area, the conveying equipment continuously and uninterruptedly enters and exits the drying bin for drying treatment, the drying efficiency is high, and the production of enterprises is facilitated.

Description

Continuous freeze-drying system

Technical Field

The utility model relates to the technical field of freeze-drying equipment, in particular to a continuous freeze-drying system.

Background

Freeze-drying is a technique of drying by using the principle of sublimation, and is a process of rapidly freezing a substance to be dried at a low temperature and then directly sublimating frozen water molecules into water vapor in a proper vacuum environment to escape. The product obtained by freeze-drying is called a lyophilisate (lyophilizer), and the process is called lyophilization (lyophilization). The material is always in low temperature (freezing state) before drying, and meanwhile, the ice crystals are uniformly distributed in the material, so that the concentration phenomenon caused by dehydration in the sublimation process can not occur, and the side effects of foam, oxidation and the like generated by water vapor are avoided. The dry matter is porous and has basically unchanged volume, and is easy to dissolve in water to restore its original shape. Preventing the physical, chemical and biological denaturation of the dry matters to the maximum extent.

The vacuum freeze-drying technology has wide application in the fields of bioengineering, pharmaceutical industry, food industry, material science, deep processing of agricultural and sideline products and the like. The medicine freeze-drying comprises western medicines and Chinese medicines. Western medicine freeze drying has been developed to some extent in China, and many larger pharmaceutical factories have freeze drying equipment.

Continuous vacuum freeze-drying equipment is being explored and used at home and abroad. The continuous equipment is characterized by being suitable for the production of products with single variety, huge yield and sufficient raw materials, and is particularly suitable for the production of pulpy and granular products. The continuous equipment is easy to realize automatic control, manual operation and management are simplified, and the existing continuous freeze drying equipment is as follows: the continuous processing type freeze drying system and method of CN202110218760.X adopts continuous and circulating operation process flow, so that uninterrupted production of freeze-dried products is realized, the production efficiency of freeze-drying equipment is improved, the rotation times of materials are reduced, the contact time of the materials with the outside is reduced, and the quality of freeze-dried products is improved. In the technology, the materials are freeze-dried in a batch mode, and are limited by the size of a freeze dryer, so that the freeze-drying efficiency of the materials in a large batch is low, and the high yield and continuous use requirements of food drying cannot be well met.

Disclosure of Invention

The utility model aims to provide a continuous freeze-drying product system, which solves the problems that the freeze-drying efficiency of the prior art on a large amount of materials is low, and the high yield and the continuous use requirement of food drying cannot be well met.

The utility model is realized in that a continuous freeze-drying system comprises a freezing zone for freezing material, a loading station for loading a tray filled with frozen material into a transport device, a drying bin for drying material, a discharge zone and a conveying track, the conveying track penetrating the drying bin,

the drying bin comprises a drying area for installing a drying plate layer and buffer areas arranged at two ends of the drying area, a partition plate capable of separating the two areas is arranged between the buffer areas and the drying area, and the conveying equipment can move along the conveying track.

The material after the freeze district processing is loaded on the transportation equipment that can remove, removes along the delivery track, and transportation equipment is under the cooperation of buffer and drying zone, can realize drying operation in drying zone and need not to pause, carries out drying treatment in the continuous incessant business turn over drying storehouse of transportation equipment, and drying efficiency is high, is favorable to the production of enterprise.

A partition board capable of separating the two areas is arranged between the drying area and the buffer area, and when the buffer area needs to be communicated with the outside, the buffer area is separated from the drying area through the partition board in order to avoid the influence on the drying area, so that the drying treatment procedure of the drying area is ensured; when the transportation equipment needs to enter and exit the drying area, the partition plate is opened, and the transportation equipment can smoothly and continuously move in the drying bin; the continuous drying treatment of the materials on the transportation equipment is ensured due to uninterrupted operation of the drying area, the utilization rate of the equipment is improved, the yield of freeze-dried products is increased, the internal framework is simple, the maintenance is convenient, and the operation is reliable.

The utility model further adopts the technical scheme that: the drying area comprises a plurality of temperature control areas, and the temperature control areas are respectively connected with a heating assembly.

A plurality of control by temperature change district in the drying district, every control by temperature change district all is connected with heating element is independent, can make the temperature in independent control by temperature change district, selects different heating temperature according to the demand of different materials, and the suitability is high.

The utility model further adopts the technical scheme that: the vapor generated by heating treatment in the drying area is subjected to ice catching through a cold trap.

The utility model further adopts the technical scheme that: and a vacuum system, a cold trap, a refrigerating system and a circulating system are arranged outside the drying bin. The vacuum system is connected with the drying bin through the cold trap, and when vacuumizing is performed, water vapor of materials in the drying bin is subjected to ice catching treatment, the drying bin is connected with the vacuum system through the cold trap, and the cold trap is connected with the refrigerating system.

The utility model further adopts the technical scheme that: the buffer zone can be connected with the vacuum system for vacuumizing treatment, or the buffer zone is directly externally connected with a vacuumizing device for vacuumizing treatment.

The utility model further adopts the technical scheme that: the temperature in the plurality of temperature control areas is gradually increased along the direction of the discharging area.

The drying degree of the materials entering the drying area at different times is different, the temperature from the input end to the output end of the drying bin is gradually increased, and the drying of the materials is more sufficient.

The temperature of the temperature control areas is different, so that the device can effectively adapt to the process flow of different products, each set of plate layer is independently provided with a circulating system, the temperature difference of different process stages is ensured, and the requirements of different products are met, thereby improving the drying quality of the products.

The utility model further adopts the technical scheme that: the conveying equipment comprises a frame body, a pulley assembly connected with the top of the frame body and a driving connecting piece connected with the bottom of the frame body, wherein the frame body is used for placing the tray, the pulley assembly is in sliding connection with the conveying rail, the driving connecting piece is matched with a driving assembly arranged in the drying bin, and the driving assembly is used for driving the conveying equipment to move to a discharging end along the feeding end of the drying bin.

The utility model further adopts the technical scheme that: the conveying equipment bottom is equipped with the drive connecting piece with drive assembly complex, and the top is equipped with track complex pulley assembly, after getting into dry storehouse, moves along the freeze dryer under drive assembly's effect, through the drive of the drive assembly in the dry storehouse for conveying equipment can be continuous business turn over dry storehouse, thereby can be continuous carry out freeze-drying to the material in the tray and handle, guarantee work efficiency.

The utility model further adopts the technical scheme that: the frame body comprises two hanging bearing plates at two sides, and the tray is arranged on the bearing plates.

The two sides of the frame body are provided with the bearing plates with the trays, the bearing plates are arranged on the drying plate layers on two sides of the drying bin for heat treatment, and the trays do not need to be fed from the bearing plates to the drying plate layers in the drying bin, so that the time is saved, the auxiliary feeding and discharging structure in the drying bin is reduced, and the space is saved.

The transport apparatus includes a plurality of sets of pulley assemblies, a distance between adjacent pulley assemblies being greater than a butt gap between the conveyor rails.

The utility model further adopts the technical scheme that: the conveying track comprises a first track arranged in the drying bin and a second track arranged outside the drying bin and connected with the output end of the drying bin, the unloading area, the loading station and the input end of the drying bin.

The utility model further adopts the technical scheme that: the conveying track can be arranged at the bottom of the drying bin or at the top of the drying bin.

The utility model further adopts the technical scheme that: the first track is in butt joint with the second track through a gap, the butt joint gap between the first track and the second track does not influence the operation of the transportation equipment, and the bin gate is opened through a gate valve structure. The second track and the butt joint of the first track can be designed into a rotating and folding structure aiming at a drying bin requiring to open the bin door outwards, so that the second track is prevented from influencing the opening of the bin door.

The first track and the second track have the clearance of butt joint, in order to guarantee that transportation equipment can be stable through the clearance of butt joint, the distance between the adjacent pulley assembly in the transportation equipment is greater than the butt joint clearance to avoid appearing transportation equipment "phenomenon of knocking with the head", guarantee the stability of transporting.

The conveying track penetrates through the drying bin and passes through the unloading area and the loading station, so that the conveying equipment can be circularly conveyed on the conveying track, the buffer area and the drying area in the drying bin are matched, the partition boards between the two areas can be separated, the drying area can continuously dry materials on the conveying equipment in the drying area, the drying efficiency is guaranteed, and the conveying equipment can be circularly used.

The utility model further adopts the technical scheme that: the drying bin is internally provided with a driving assembly, the driving assembly comprises a driving piece and a driving wheel sleeved on the driving piece, and the bottom of the conveying equipment is provided with a driving connecting piece in driving fit with the driving wheel.

The driving assembly can continuously drive the conveying equipment passing through the driving assembly, and the conveying equipment stably runs in the drying bin under the action of the driving assembly and the conveying track.

The utility model further adopts the technical scheme that: the driving piece comprises a main driving structure, a driven structure and a transmission structure, wherein the main driving structure and the driven structure form synchronous motion through the transmission structure, and the conveying equipment moves between driving components.

The utility model further adopts the technical scheme that: the drying bin is internally provided with a plurality of groups of driving components, and each group of driving components are mutually independent, so that the same conveying equipment can still stably run in a plurality of assembled drying bins, and the application range of the trolley is improved.

The transmission structure and the driven structure synchronously move, so that the transportation equipment on the driving piece can stably move forwards to finish transportation.

The utility model further adopts the technical scheme that: the main driving structure comprises a driving motor and a driving rotating shaft connected with the output end of the driving motor, the driven structure comprises a driven rotating shaft, and the transmission structure is a synchronous belt structure or a chain structure.

The driving belt wheel is sleeved on the driving rotating shaft, the driven belt wheel is sleeved on the driven rotating shaft, and the driving belt wheel is connected with the driven belt wheel through the driven structure. The driving belt wheel and the driven belt wheel can be replaced by chain wheels, and the transmission structure at the moment is a chain structure.

The driving motor is a variable frequency motor. The transmission structure can also be other structures which can enable the driving structure and the driven structure to synchronously move, such as racks.

The distance between the driving rotating shaft and the driven rotating shaft is smaller than the length of the driving connecting piece, so that at least one driving wheel is matched with the driving connecting piece within the same time, continuous power of the conveying equipment in the drying bin is guaranteed, and the situation that the conveying equipment stagnates in the drying bin can not occur during operation.

The utility model further adopts the technical scheme that: the output end of the driving motor is connected with the driving rotating shaft through a coupling.

The utility model further adopts the technical scheme that: the driving wheel comprises a main driving wheel sleeved on the main driving structure and a driven wheel sleeved on the driven structure.

When the main driving wheel and the driven wheel are chain wheels, the driving connecting piece is a chain matched with the chain wheels.

When the main driving wheel and the driven wheel are gears, the driving connecting piece is a rack matched with the gears.

The utility model further adopts the technical scheme that: the output end of the driving motor is sealed with the shell of the drying bin through a sealing flange and is rotatably connected with the shell, so that the temperature in the drying bin is ensured to be maintained stable.

The utility model further adopts the technical scheme that: the driving connecting piece is a rack or a chain, and is in synchronous driving fit with the driving wheel.

The utility model also provides a continuous freeze-drying method, which is based on the freeze-drying system and comprises the following steps:

s1, taking a tray filled with frozen materials out of a freezing area, placing the tray on a conveying device at a loading station, and enabling the conveying device to enter a buffer area at the input end of a drying bin along a conveying track and then enter a drying area;

s2, when the time of the conveying equipment in the drying area reaches a set time, the conveying equipment moves towards a buffer area of an output end of the drying bin, and the next conveying equipment enters the drying area;

s3, repeating the step S2 until the conveying equipment enters a buffer area at the output end of the drying bin;

s4, the transportation equipment enters a discharging area to take off the tray, and then returns to the loading station.

The utility model further adopts the technical scheme that: the buffer area comprises a first buffer area at the input end of the drying bin and a second buffer area at the output end of the drying bin; wherein the drying zone cooperates with the buffer zone as follows: the transportation equipment enters the first buffer area from the outside, the vacuum degree of the drying area and the first buffer area is regulated, after the vacuum degree is within a certain range, a partition plate between the first buffer area and the drying area is opened, so that the first buffer area is communicated with the drying area, the first transportation equipment enters the drying area, after the drying area is dried for a set time, the first transportation equipment moves towards the second buffer area, the second transportation equipment enters the original position of the first transportation equipment in the drying area from the first buffer area, drying treatment is carried out, and the like until the first transportation equipment enters the second buffer area; in the process, the material entering the drying area can not influence the drying progress of the material entering the drying area after entering the material, the suspension drying treatment of the drying area is not needed, the drying area is always in a working state, the material in the drying area is dried continuously, the continuity of drying work is realized, and the working efficiency is ensured.

The utility model further adopts the technical scheme that: the material to be dried enters the drying zone from the first buffer zone under the action of the conveying equipment while the conveying equipment continuously enters the second buffer zone from the drying zone, so that continuous and uninterrupted drying treatment is realized.

The utility model further adopts the technical scheme that: the second buffer zone enters into the transportation equipment of the unloading zone, after unloading in the unloading zone, the dried products loaded on the tray are transported to the packaging line for packaging and boxing, the transportation equipment is loaded to the loading station along the conveying track, and after loading, the transportation equipment waits for entering outside the first buffer zone, so that the transportation equipment is recycled.

The utility model further adopts the technical scheme that: the drying area is in a vacuum state, and before the transportation equipment enters and exits the drying area, the pressure difference between the buffer area and the drying area is in a set range.

The utility model further adopts the technical scheme that: before the door of the drying bin is opened, the pressure in the buffer area is regulated to the atmospheric pressure. The safety of the working process is ensured.

The utility model has the beneficial effects that: according to the utility model, the materials processed by the freezing zone are loaded onto the movable conveying equipment and move along the conveying track, the conveying equipment is matched with the drying zone in the buffer zone, so that the drying operation of the drying zone is not required to be suspended, the conveying equipment continuously and continuously enters and exits the drying bin for drying treatment, the drying efficiency is high, and the production of enterprises is facilitated;

a partition board capable of separating the two areas is arranged between the drying area and the buffer area, and when the buffer area needs to be communicated with the outside, the buffer area is separated from the drying area through the partition board in order to avoid the influence on the drying area, so that the drying treatment procedure of the drying area is ensured; when the transportation equipment needs to enter and exit the drying area, the partition plate is opened, and the transportation equipment can smoothly and continuously move in the drying bin; the continuous drying treatment of the materials on the transportation equipment is ensured due to uninterrupted operation of the drying area, so that the utilization rate of the equipment is improved, the yield of freeze-dried products is increased, the internal framework is simple, the maintenance is convenient, and the operation is reliable;

the conveying track penetrates through the drying bin and passes through the unloading area and the loading station, so that the conveying equipment can be circularly conveyed on the conveying track, the buffer area and the drying area in the drying bin are matched, the partition boards between the two areas can be separated, the drying area can continuously dry materials on the conveying equipment in the drying area, the drying efficiency is guaranteed, and the conveying equipment can be circularly used.

Drawings

FIG. 1 is a top view of a continuous lyophilization system provided by the present utility model;

FIG. 2 is a schematic diagram of a buffer area according to the present utility model;

FIG. 3 is a schematic view of the structure of the drying bin provided by the utility model;

FIG. 4 is a schematic view of the structure of a heating plate layer provided by the present utility model;

FIG. 5 is a schematic view of the structure of the transportation device provided by the present utility model;

FIG. 6 is a schematic view of the structure of the transportation device provided by the present utility model;

fig. 7 is a schematic structural diagram of a driving assembly provided by the present utility model.

Reference numerals: 1. lyophilization equipment, 11, heating plate layers, 12, buffer area, 13, drying bin, 14, cabin door, 111, frame body, 112, pulley assembly, 113, drive connection, 2, transportation track, 3, transportation equipment, 4, drive assembly, 41, primary drive structure, 42, driven structure, 43, driven structure, 5, connection plate, 6, refrigeration system, 7, vacuum system, 9, circulation system, 10, cold trap, 411, drive motor, 414, drive shaft, 421, driven shaft, 416, drive gear, 423, driven gear, 43, drive structure, 413, coupling, 412, sealing flange, 415, drive pulley, 422.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.

It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present utility model, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present utility model, and should still fall within the scope of the disclosure of the present utility model without affecting the efficacy and achievement of the present utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Embodiment one:

fig. 1-7 show a continuous freeze-drying system comprising a freezing zone for frozen material, a loading station for placing trays containing frozen material into a transport device 3, a drying silo 1 for drying the material, a discharge zone and a conveyor track 2, said conveyor track 2 extending through said drying silo 1,

the drying bin comprises a drying area 13 for installing the drying plate layer 11 and buffer areas 12 arranged at two ends of the drying area 13, a partition board capable of separating the two areas is arranged between the buffer areas 12 and the drying area 13, and the conveying equipment 3 can move along the conveying track 2.

In this embodiment, the drying area 13 includes a plurality of temperature control areas, and a heating assembly 6 is respectively connected to the plurality of temperature control areas.

A plurality of control by temperature change district in the drying district, every control by temperature change district all is connected with heating element is independent, can make the temperature in independent control by temperature change district, selects different heating temperature according to the demand of different materials, and the suitability is high.

In this embodiment, water vapor generated by the heating process in the drying zone is subjected to ice-catching through the cold trap.

In this embodiment, the drying chamber 1 is provided with a vacuum system 7, a cold trap 10, a refrigeration system 6 and a circulation system 9. The vacuum system 7 is connected with the drying bin 1 through the cold trap 10, and when the vacuum is pumped, water vapor of materials in the drying bin 1 is subjected to ice catching treatment; the drying bin 1 is connected with a vacuum system 7 through a cold trap 10, and the cold trap 10 is connected with a refrigerating system 6.

In this embodiment, the buffer area may be connected to the vacuum system to perform vacuum pumping, or the buffer area may be directly connected to a vacuum pumping device to perform vacuum pumping.

In this embodiment, the cold trap 10 includes a first cold trap, a second cold trap and a third cold trap, which are respectively arranged from the input end to the output end of the drying bin, and the first cold trap, the second cold trap and the third cold trap continuously perform circulating frost, so that the tray continuous freeze dryer is ensured to always have the cold trap to catch ice when working, the effect of circulating ice catching and defrosting is achieved, the larger ice catching effect is achieved by using a smaller ice catching area, and the working efficiency of the cold trap is greatly improved.

In this embodiment, the first cold trap is closest to the product just entering, so the first cold trap will strike the upper ice capture limit first. When the first cold trap cannot catch ice, at the moment, a mushroom valve of the first cold trap is closed, high-pressure steam is put into the first cold trap to defrost, at the moment, the second cold trap and the third cold trap are in operation, when the ice catching amount of the second cold trap reaches the upper limit, the third cold trap starts to operate, at the moment, the defrosting time of the first cold trap is also finished, the first cold trap starts to be vacuumized, the mushroom valve is opened, the first cold trap and the third cold trap start to catch ice at the same time, when the ice catching of the third cold trap reaches the upper limit, the third cold trap stops operating to start defrosting, and the first cold trap and the second cold trap start to operate at the same time, so that circulating defrosting is performed, and the tray continuous freeze dryer is guaranteed to always catch ice by the cold traps during operation.

In this embodiment, the temperature in the plurality of temperature control zones is gradually increased along the direction of the discharging zone.

The drying degree of the materials entering the drying area at different times is different, the temperature from the input end to the output end of the drying bin is gradually increased, and the drying of the materials is more sufficient.

The temperature of the temperature control areas is different, so that the device can effectively adapt to the process flow of different products, each set of plate layer is independently provided with a circulating system, the temperature difference of different process stages is ensured, and the requirements of different products are met, thereby improving the drying quality of the products.

In this embodiment, the transporting device 1 includes a frame 111, a pulley assembly 112 connected to the top of the frame 111, and a driving connection member 113 connected to the bottom of the frame 111, where the frame 111 is used to place the tray, the pulley assembly 112 is slidably connected to the conveying track 2, the driving connection member 113 is matched with a driving assembly 4 disposed in the drying bin 1, and the driving assembly 4 is used to drive the transporting device 1 to move along the feeding end to the discharging end of the drying bin 1.

The conveying equipment bottom is equipped with the drive connecting piece with drive assembly complex, and the top is equipped with track complex pulley assembly, after getting into dry storehouse, moves along the freeze dryer under drive assembly's effect, through the drive of the drive assembly in the dry storehouse for conveying equipment can be continuous business turn over dry storehouse, thereby can be continuous carry out freeze-drying to the material in the tray and handle, guarantee work efficiency.

As a preferred embodiment, the frame 111 includes two hanging receiving plates, and the tray is placed on the receiving plates.

The two sides of the frame body are provided with the bearing plates with the trays, the bearing plates are arranged on the drying plate layers on two sides of the drying bin for heat treatment, and the trays do not need to be fed from the bearing plates to the drying plate layers in the drying bin, so that the time is saved, the auxiliary feeding and discharging structure in the drying bin is reduced, and the space is saved.

The transport apparatus includes a plurality of sets of pulley assemblies, a distance between adjacent pulley assemblies being greater than a butt gap between the conveyor rails.

In this embodiment, the conveying track 2 includes a first track disposed in the drying bin 1 and a second track disposed outside the drying bin 1 and connected to the output end of the drying bin 1, the unloading area, the loading station, and the input end of the drying bin 1.

As a preferred embodiment, the conveying track may be disposed at the bottom of the drying chamber or may be disposed at the top of the drying chamber.

In this embodiment, the first track and the second track are in butt joint with a gap, the butt joint gap between the first track and the second track does not affect the operation of the transportation equipment, and the door is opened by adopting a gate valve structure.

The first track and the second track have the clearance of butt joint, in order to guarantee that transportation equipment can be stable through the clearance of butt joint, the distance between the adjacent pulley assembly in the transportation equipment is greater than the butt joint clearance to avoid appearing transportation equipment "phenomenon of knocking with the head", guarantee the stability of transporting.

As an alternative, for the drying bin requiring outward opening of the bin gate, the butt joint of the second rail and the first rail can be designed into a rotary folding structure, so that the second rail is prevented from influencing the opening of the bin gate.

The conveying track penetrates through the drying bin and passes through the unloading area and the loading station, so that the conveying equipment can be circularly conveyed on the conveying track, the buffer area and the drying area in the drying bin are matched, the partition boards between the two areas can be separated, the drying area can continuously dry materials on the conveying equipment in the drying area, the drying efficiency is guaranteed, and the conveying equipment can be circularly used.

In this embodiment, a driving assembly 4 is disposed in the drying bin 1, the driving assembly 4 includes a driving member and a driving wheel sleeved on the driving member, and a driving connecting member 113 in driving fit with the driving wheel is disposed at the bottom of the transporting device 3.

The driving assembly can continuously drive the conveying equipment passing through the driving assembly, and the conveying equipment stably runs in the drying bin under the action of the driving assembly and the conveying track.

In the present embodiment, the driving member comprises a main driving structure 41, a driven structure 42 and a transmission structure 43, wherein the main driving structure 41 and the driven structure 42 form synchronous movement through the transmission structure 43, and the transportation device 3 moves between the driving assemblies 4.

In this embodiment, be equipped with multiunit drive assembly in the dry storehouse, each set of drive assembly is independent each other to guarantee that same transportation equipment can still be in a plurality of dry warehouses of equipment can stable operation, improve the accommodation of dolly.

The transmission structure and the driven structure synchronously move, so that the transportation equipment on the driving piece can stably move forwards to finish transportation.

In this embodiment, the main driving structure 41 includes a driving motor 411 and a driving shaft 414 connected to an output end of the driving motor 411, the driven structure 42 includes a driven shaft 421, and the transmission structure 43 is a synchronous belt structure or a chain structure.

The driving shaft 414 is sleeved with a driving belt pulley 415, the driven shaft 421 is sleeved with a driven belt pulley 422, and the driving belt pulley 415 is connected with the driven belt pulley 422 through the driven structure 42. The driving pulley 415 and the driven pulley 422 can be replaced by sprockets, and the transmission structure is a chain structure.

The driving motor is a variable frequency motor. The transmission structure can also be other structures which can enable the driving structure and the driven structure to synchronously move, such as racks.

The distance between the driving rotating shaft and the driven rotating shaft is smaller than the length of the driving connecting piece, so that at least one driving wheel is matched with the driving connecting piece within the same time, continuous power of the conveying equipment in the drying bin is guaranteed, and the situation that the conveying equipment stagnates in the drying bin can not occur during operation.

In this embodiment, the output end of the driving motor 411 is connected to the driving shaft 414 through a coupling 413.

In this embodiment, the driving wheel includes a main driving wheel 416 sleeved on the main driving structure 41 and a driven wheel 423 sleeved on the driven structure 42.

As a preferred embodiment, when the main driving wheel and the driven wheel are sprockets, the driving connection member is a chain engaged with the sprockets.

As a preferred embodiment, when the main driving wheel and the driven wheel are gears, the driving connection member is a rack engaged with the gears.

In this embodiment, the output end of the driving motor 411 is connected with the housing of the drying chamber in a sealing and rotatable manner through a sealing flange 412, so as to ensure that the temperature in the drying chamber is maintained stable.

In this embodiment, the driving connection member 113 is a rack or a chain, and the driving connection member 113 is in synchronous driving engagement with the driving wheel.

The working principle of the utility model is as follows: the material after the freeze district processing is loaded on the transportation equipment that can remove, removes along the delivery track, and transportation equipment is under the cooperation of buffer and drying zone, can realize drying operation in drying zone and need not to pause, carries out drying treatment in the continuous incessant business turn over drying storehouse of transportation equipment, and drying efficiency is high, is favorable to the production of enterprise. A partition board capable of separating the two areas is arranged between the drying area and the buffer area, and when the buffer area needs to be communicated with the outside, the buffer area is separated from the drying area through the partition board in order to avoid the influence on the drying area, so that the drying treatment procedure of the drying area is ensured; when the transportation equipment needs to enter and exit the drying area, the partition plate is opened, and the transportation equipment can smoothly and continuously move in the drying bin; the continuous drying treatment of the materials on the transportation equipment is ensured due to uninterrupted operation of the drying area, the utilization rate of the equipment is improved, the yield of freeze-dried products is increased, the internal framework is simple, the maintenance is convenient, and the operation is reliable.

Embodiment two:

a continuous lyophilization process based on the lyophilization system described in embodiment one, comprising the steps of:

s1, taking a tray filled with frozen materials out of a freezing area, placing the tray on a conveying device 3 at a loading station, enabling the conveying device 3 to enter a buffer area 12 at the input end of a drying bin along a conveying track 2, and then entering a drying area 13;

s2, when the time of the conveying equipment 3 in the drying area reaches the set time, the conveying equipment 3 moves towards the buffer area 12 at the output end of the drying bin 1, and the next conveying equipment 3 enters the drying area 13;

s3, repeating the step S2 until the conveying equipment 3 enters a buffer zone 12 at the output end of the drying bin 1;

s4, the transportation equipment 3 enters a discharging area to take off the tray, and then returns to the loading station.

In this embodiment, the buffer areas include a first buffer area at the input end of the drying bin and a second buffer area at the output end of the drying bin; wherein the drying zone cooperates with the buffer zone as follows: the transportation equipment enters the first buffer area from the outside, the vacuum degree of the drying area and the first buffer area is regulated, after the vacuum degree is within a certain range, a partition plate between the first buffer area and the drying area is opened, so that the first buffer area is communicated with the drying area, the first transportation equipment enters the drying area, after the drying area is dried for a set time, the first transportation equipment moves towards the second buffer area, the second transportation equipment enters the original position of the first transportation equipment in the drying area from the first buffer area, drying treatment is carried out, and the like until the first transportation equipment enters the second buffer area; in the process, the material entering the drying area can not influence the drying progress of the material entering the drying area after entering the material, the suspension drying treatment of the drying area is not needed, the drying area is always in a working state, the material in the drying area is dried continuously, the continuity of drying work is realized, and the working efficiency is ensured.

In this embodiment, the material to be dried enters the drying zone from the first buffer zone under the action of the transporting device while the transporting device continuously enters the second buffer zone from the drying zone, thereby realizing continuous and uninterrupted drying treatment.

In this embodiment, the second buffer area enters into the transportation equipment of the unloading area, after unloading in the unloading area, the dried product loaded on the tray is transported to the packaging line for packaging and boxing, and the transportation equipment is loaded to the loading station along the conveying track, and waits for entering outside the first buffer area after loading, so that the transportation equipment is recycled.

In this embodiment, the drying area 13 is in a vacuum state, and the pressure difference between the buffer area 12 and the drying area 13 is controlled within a range of 1000pa before the transportation device 3 enters and exits the drying area 13.

In this embodiment, the pressure in the buffer zone is adjusted to atmospheric pressure before the door of the drying bin is opened. The safety of the working process is ensured.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. A continuous lyophilization system, characterized by: comprises a freezing area for freezing materials, a loading station for placing a tray filled with the frozen materials into a conveying device (3), a drying bin (1) for drying the materials, a discharging area and a conveying track (2), wherein the conveying track (2) penetrates through the drying bin (1),

the drying bin comprises a drying area (13) for installing a drying plate layer (11) and buffer areas (12) arranged at two ends of the drying area (13), a partition plate capable of separating the two areas is arranged between the buffer areas (12) and the drying area (13), and the conveying equipment (3) can move along the conveying track (2).

2. A continuous freeze drying system according to claim 1, wherein the drying zone (13) comprises a plurality of temperature controlled zones, to which heating elements are connected, respectively.

3. A continuous lyophilization system according to claim 2, where the temperature in a plurality of the temperature controlled zones is stepped up in the direction of the discharge zone.

4. A continuous freeze drying system according to any of claims 1-3, characterized in that the drying chamber (1) is connected to a vacuum system (7) via a cold trap (10), the cold trap (10) being connected to a refrigeration system (6).

5. A continuous freeze drying system according to any of claims 1-3, wherein the transport device (3) comprises a frame (111), a pulley assembly (112) connected to the top of the frame (111) and a drive connection (113) connected to the bottom of the frame (111), the frame (111) is used for placing the tray, the pulley assembly (112) is slidably connected to the conveyor track (2), the drive connection (113) cooperates with a drive assembly (4) placed in the drying bin (1), and the drive assembly (4) is used for driving the transport device (3) to move along the feed end to the discharge end of the drying bin (1).

6. A continuous freeze drying system according to any of claims 1-3, characterized in that the conveying track (2) comprises a first track placed inside the drying chamber (1) and a second track placed outside the drying chamber (1) connecting the output end of the drying chamber (1), the discharge area, the loading station and the input end of the drying chamber (1).

7. A continuous freeze drying system according to any of claims 1-3, wherein a drive assembly (4) is arranged in the drying chamber (1), the drive assembly (4) comprises a drive member and a drive wheel sleeved on the drive member, and a drive connection member (113) in drive fit with the drive wheel is arranged at the bottom of the transport device (3).

8. Continuous freeze drying system according to claim 7, characterized in that the drive comprises a primary drive structure (41), a secondary structure (42) and a transmission structure (43), the primary drive structure (41) and the secondary structure (42) being moved synchronously by the transmission structure (43), the transport device (3) being moved between the drive assemblies (4).

Images