An adjustable spacing multi-tiered lyophilization tray rack structure

Abstract

The utility model discloses a multilayer freeze-drying tray frame structure of adjustable spacing, including outer frame and the mobile wheel of fixed connection at its bottom four corners, the left and right sides fixed connection of outer frame inside have the vertical rod, the vertical rod surface sliding connection slide layer, be equipped with the clamping groove in the inboard of slide layer still include: tray mechanism: tray mechanism includes the disc body of sliding connection between the clamping groove, the left and right sides fixed connection of disc body inside have the slide rail, the inboard fixed connection of slide rail have the rack, the inside rear end sliding connection of slide rail have the sliding block, the rotation connection of sliding block between have the rotating roller, the left and right sides fixed connection of rotating roller have the gear, sliding block front end fixed pipe connection have the pull rod. Multilayer freeze-drying tray frame structure of adjustable spacing disclosed by the utility model has realized material automatic spreading, guarantees the even effect of thickness.

Description

Technical Field

[0001] This utility model relates to the field of freeze-drying tray rack technology, and in particular to a multi-layer freeze-drying tray rack structure with adjustable spacing. Background Technology

[0002] Vacuum freeze-drying is a material dehydration technology. Its principle involves placing the material in a specialized freeze-drying tray, where the water-containing substances freeze at low temperatures. Then, in a vacuum environment, the water sublimates directly from solid ice into water vapor, thus achieving the drying purpose. It can preserve the original physical, chemical, and biological properties of materials to the greatest extent possible and is widely used in pharmaceuticals, food, and biological products.

[0003] However, most existing pallets only serve as passive load-bearing containers. When handling easily accumulated materials such as slurries or granules, external tools or manual pre-leveling is required before placing the pallet into the frame. This process carries the risk of contamination from external substances, and manual leveling is difficult to control precisely, easily leading to uneven distribution of material within the pallet, affecting the uniformity of the entire batch's product quality. For example, when freeze-drying a batch of high-value biological agents in the laboratory, operators need to pour the solution into multiple trays. Due to the fluidity and surface tension of the solution, the material will naturally form an uneven distribution within the trays, thicker in the middle and thinner at the edges. If it cannot be spread out effectively and promptly on the tray surface, the thicker part in the middle will be difficult to dry completely after entering the freeze-drying chamber, potentially resulting in an "under-dried" state, while the thinner part at the edges may become inactive due to over-drying, leading to the scrapping of the entire batch and causing huge losses. Utility Model Content

[0004] This utility model discloses a multi-layer freeze-drying pallet rack structure with adjustable spacing, aiming to solve the technical problem that existing pallets, when handling easily accumulated materials such as slurries and granules, require external tools or manual pre-leveling on the outside of the pallet. This is because such materials are easily contaminated by external substances, and manual leveling is difficult to control precisely, affecting the quality of the entire batch of products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable-spacing multi-layer freeze-drying tray rack structure includes an outer frame and movable wheels fixedly connected to its four bottom corners. Vertical rods are fixedly connected to the left and right sides inside the outer frame. A sliding layer is slidably connected to the surface of the vertical rods. A slot is formed on the inner side of the sliding layer. The structure also includes: a tray mechanism: the tray mechanism includes a tray body slidably connected between the slots. Slide rails are fixedly connected to the left and right sides inside the tray body. A rack is fixedly connected to the inner side of the slide rails. A slider is slidably connected to the rear end of the slide rails. A rotating roller is rotatably connected between the sliders. Gears are fixedly connected to the left and right sides of the rotating roller. A pull rod is fixedly connected to the front end of the slider via a tube. An adjustment mechanism: the adjustment mechanism is fixedly connected to the left side of the vertical rod.

[0006] By adopting the above technical solution, in-situ, efficient, and uniform leveling of materials inside the tray is achieved. When the lever is pulled, the pulling force is transmitted to the rotating roller through the slider. Since the gears on both sides of the rotating roller mesh with the racks fixed inside the slide rail, the rotating roller rotates while moving forward, forming a compound motion. The strips on the surface of the rotating roller rotate accordingly, breaking up and leveling the slurry or granular material accumulated in the tray, ensuring it is evenly spread at the bottom of the tray. This ensures uniform heating of the material during freeze-drying and improves the consistency of drying quality. After the leveling operation is completed, the operator can push the lever back, completely retracting the rotating roller and strips into the circular cavity at the rear of the tray, avoiding interference with subsequent freeze-drying processes. This mechanism eliminates the need for additional leveling tools, simplifies the operation process, and reduces the risk of material contamination during external processing.

[0007] As a further embodiment of this utility model: the adjustment mechanism includes a rectangular plate disposed on the left side of the sliding layer, a sliding groove is provided on the surface of the rectangular plate, a connecting block is slidably connected inside the sliding groove, a threaded seat is fixedly connected to the middle of the front end of the rectangular plate, and a lead screw is threadedly connected inside the threaded seat.

[0008] By adopting the above technical solution, synchronous, continuous, and stable adjustment of the vertical spacing of multi-layer trays is achieved. When the lead screw is rotated, the threaded seat that engages with it drives the rectangular plate to move up and down along the outer frame. Multiple inclined sliding grooves on the rectangular plate, in conjunction with connecting blocks, convert the vertical movement of the rectangular plate into the horizontal movement of the left sliding layer on the vertical rod. Since the left and right sliding layers are rigidly connected by the tray body, the right sliding layer moves synchronously, ultimately causing the entire tray layer system to rise and fall synchronously, changing the net height between each layer. Users can quickly adjust the layer spacing according to the actual height of the material to be dried, thereby optimizing the utilization efficiency of the vertical space inside the freeze dryer chamber and increasing the single-batch processing capacity.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. The material is spread inside the tray by pushing and pulling, which improves the efficiency and uniformity of material spreading and ensures the uniformity of subsequent freeze-drying quality. It also avoids the risk of contamination and the cumbersome operation caused by using external tools. After use, the roller can be retracted and hidden without affecting the normal function of the tray.

[0010] 2. With a single rotation operation, all pallet layers can be driven to rise and fall synchronously and at equal intervals, achieving stepless and precise adjustment of the layer spacing. This allows for flexible adaptation to material containers of different heights, greatly improving the utilization rate of the vertical space in the freeze-drying chamber, while ensuring overall stability during structural adjustment.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a multi-layer freeze-drying tray rack with adjustable spacing proposed in this utility model.

[0013] Figure 2 This is a schematic diagram of the outer frame of a multi-layer freeze-drying tray rack structure with adjustable spacing proposed in this utility model.

[0014] Figure 3 This is a schematic diagram of a multi-layer freeze-drying pallet rack structure with adjustable spacing proposed in this utility model.

[0015] Figure 4 This diagram illustrates the slide rail of an adjustable-spacing multi-layer freeze-drying tray rack structure proposed in this utility model.

[0016] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle.

[0017] Figure 6 for Figure 4 Enlarged view of section B in the middle.

[0018] Figure 7 This is a schematic diagram of the sliding layer of a multi-layer freeze-drying tray rack structure with adjustable spacing proposed in this utility model.

[0019] Figure 8 This is a schematic diagram of the adjustment mechanism of a multi-layer freeze-drying tray structure with adjustable spacing proposed in this utility model.

[0020] In the attached diagram: 1. Outer frame; 2. Moving wheel; 3. Vertical rod; 4. Sliding layer; 5. Slot; 6. Disc; 7. Slide rail; 8. Rack; 9. Slider; 10. Rotary roller; 11. Gear; 12. Tie rod; 13. Rectangular plate; 14. Slide groove; 15. Connecting block; 16. Threaded seat; 17. Lead screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A multi-layer freeze-drying tray rack structure with adjustable spacing includes an outer frame 1 and movable wheels 2 fixedly connected to the four corners at its bottom. Vertical rods 3 are fixedly connected to the left and right sides inside the outer frame 1. Sliding layers 4 are slidably connected to the surface of the vertical rods 3. Slots 5 are opened on the inner side of the sliding layers 4. The structure also includes: a tray mechanism: the tray mechanism includes a tray body 6 slidably connected between the slots 5. Slide rails 7 are fixedly connected to the left and right sides inside the tray body 6. A rack 8 is fixedly connected to the inner side of the slide rails 7. A slider 9 is slidably connected to the rear end inside the slide rails 7. A rotating roller 10 is rotatably connected between the sliders 9. Gears 11 are fixedly connected to the left and right sides of the rotating roller 10. A pull rod 12 is fixedly connected to the front end of the slider 9. An adjustment mechanism: the adjustment mechanism is fixedly connected to the left side of the vertical rods 3.

[0023] Specifically, when the operator pulls the lever 12 forward, the lever 12 causes the slider 9, which is fixed to it, to slide forward within the slide rail 7. The rotating roller 10, which is rotatably connected to the slider 9, has gears 11 at both ends that mesh with the rack 8 fixed inside the slide rail 7. This meshing relationship converts the linear motion of the slider 9 into a compound motion of the rotating roller 10 moving forward and rotating simultaneously. The strips on the surface of the rotating roller 10 then scrape the material inside the disc 6. After the operation is completed, the lever 12 is pushed backward, and the gears 11 roll in the opposite direction along the rack 8, driving the rotating roller 10 to reverse direction while moving backward, ultimately allowing the entire rotating roller 10 assembly to be housed in the circular cavity at the rear end of the disc 6.

[0024] The tray body 6 is slidably connected to the sliding layer 4 on the left and right sides by extension plates, ensuring that the movement trajectory of the tray is stable during the pushing and pulling process and will not deviate or tilt. The front end of the tray body 6 is provided with a handle, and the rear side of the tray body 6 is provided with a circular cavity to accommodate the rotating roller 10, so that the rotating roller 10 can be completely hidden when not in use, which will not occupy additional storage space or interfere with the material entry and exit or the airflow during the freeze-drying process.

[0025] Among them, the bottom of the gear 11 meshes with the top of the rack 8, converting the linear motion of the slider 9 into the rotational motion of the roller 10. The pull rod 12 is set in the cavity inside the slide rail 7, and the front end of the pull rod 12 is slidably connected to the front side of the disc body 6. Six push bars are equidistantly arranged on the surface of the roller 10, which effectively increases the contact and stirring effect with the material during the leveling operation, thereby achieving full dispersion and uniform leveling of the material.

[0026] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 In a preferred embodiment, the adjustment mechanism includes a rectangular plate 13 disposed on the left sliding layer 4. A groove 14 is provided on the surface of the rectangular plate 13. A connecting block 15 is slidably connected inside the groove 14. A threaded seat 16 is fixedly connected to the middle of the front end of the rectangular plate 13. A lead screw 17 is threadedly connected inside the threaded seat 16.

[0027] Specifically, when the lead screw 17 is rotated, the threaded seat 16, which is threaded to it, undergoes left and right displacement, driving the fixedly connected rectangular plate 13 to move vertically. Multiple sets of inclined sliding grooves 14 on the rectangular plate 13 move accordingly, and the groove walls exert a lateral thrust on the embedded connecting block 15. This thrust forces all left-side sliding layers 4 to move horizontally along the vertical rod 3. Since the left and right sliding layers 4 are rigidly connected to form an integral frame through the disc body 6, the right-side sliding layer 4 moves in tandem, ultimately causing all tray layers to rise or fall synchronously and at equal intervals, achieving continuous adjustment of the layer spacing.

[0028] The rectangular plate 13 is slidably connected to the top and bottom of the outer frame 1 at its upper and lower ends, respectively, which restricts the rectangular plate 13 to only make left and right linear movements, providing a basis for subsequent precise movement conversion. There are six slide grooves 14, all of which are inclined. The six slide grooves 14 are symmetrically arranged in groups of three on the upper and lower parts of the rectangular plate 13, which ensures that when the rectangular plate 13 moves, all connecting blocks 15 can be driven evenly and synchronously through the inclined mechanism, avoiding jamming of a single slide layer 4 and ensuring the synchronicity and stability of all tray layer adjustments.

[0029] The right end of the connecting block 15 is fixedly connected to the left side of the sliding layer 4 on the left side. The driving force can be directly transmitted to the sliding layer 4 through the connecting block 15. The front and rear sides of the lead screw 17 are rotatably connected to the left side of the outer frame 1 through the rotating seat. A knob is provided at the front end of the lead screw 17.

[0030] Reference Figure 1 and Figure 2 In a preferred embodiment, there are twelve sliding layers 4, which are symmetrically connected in groups of six inside the outer frame 1 on the left and right sides.

[0031] Specifically, this design provides the device with multi-layered load-bearing capacity. The symmetrical layout ensures uniform load distribution, avoids structural stress caused by uneven force distribution, and ensures that each disc 6 receives stable support, thereby guaranteeing the stability and load-bearing capacity of the overall structure.

[0032] Working Principle: During use, the operator rotates the lead screw 17, which engages with the threaded seat 16 fixed on the rectangular plate 13, causing the rectangular plate 13 to move up and down. The inclined sliding groove 14 on the rectangular plate 13, through its engagement with the connecting block 15, converts the lateral movement into the vertical movement of the left sliding layer 4. Since the left and right sliding layers 4 are rigidly connected by the disc 6 placed between them, the entire pallet system rises and falls synchronously, thereby quickly adjusting the clearance between layers to the required height. After the frame spacing is adjusted, material loading and processing can begin. The pallets are pushed one by one into the corresponding slots 5 of the layer using the handle at the front of the disc 6. When processing easily accumulated materials such as slurry or granules, the material can be poured into the disc 6 and immediately leveled. The operator pulls the lever 12 on the front side of the disc 6 forward, which drives the slider 9 forward. The rotating roller 10 on the slider 9 rotates while moving forward through the meshing of the gears 11 at both ends with the fixed rack 8. The strips on the surface of the roller 10 spread the material evenly through this combined motion. After completion, pushing back the pull rod 12 allows the roller 10 to retract into the receiving cavity at the rear of the disc 6. The entire device can be moved flexibly via the bottom moving wheels 2.

[0033] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A multi-layer freeze-drying tray rack structure with adjustable spacing, comprising an outer frame (1) and movable wheels (2) fixedly connected to its four bottom corners, wherein vertical rods (3) are fixedly connected to the left and right sides inside the outer frame (1), and sliding layers (4) are slidably connected to the surface of the vertical rods (3), and slots (5) are provided on the inner side of the sliding layers (4), characterized in that, Also includes: Pallet mechanism: The pallet mechanism includes a disc body (6) slidably connected between the slots (5), slide rails (7) are fixedly connected to the left and right sides inside the disc body (6), racks (8) are fixedly connected to the inside of the slide rails (7), sliders (9) are slidably connected to the rear end inside the slide rails (7), rollers (10) are rotatably connected between the sliders (9), gears (11) are fixedly connected to the left and right sides of the rollers (10), and a pull rod (12) is fixedly connected to the front end of the sliders (9). Adjustment mechanism: The adjustment mechanism is fixedly connected to the left side of the vertical rod (3).

2. The adjustable-spacing multi-layer freeze-drying tray rack structure according to claim 1, characterized in that, The left and right sides of the disc (6) are slidably connected between the sliding layers (4) by extension plates. A handle is provided at the front end of the disc (6), and a circular cavity for accommodating the rotating roller (10) is provided at the rear side of the disc (6).

3. The adjustable-spacing multi-layer freeze-drying tray rack structure according to claim 2, characterized in that, The bottom of the gear (11) meshes with the top of the rack (8), the pull rod (12) is disposed in the cavity inside the slide rail (7), the front end of the pull rod (12) is slidably connected to the front side of the disc (6), and six levers are equidistantly arranged on the surface of the roller (10).

4. The multi-layer freeze-drying tray rack structure with adjustable spacing according to claim 1, characterized in that, The adjustment mechanism includes a rectangular plate (13) disposed on the sliding layer (4) on the left side. A groove (14) is provided on the surface of the rectangular plate (13). A connecting block (15) is slidably connected inside the groove (14). A threaded seat (16) is fixedly connected to the middle of the front end of the rectangular plate (13). A lead screw (17) is threaded inside the threaded seat (16).

5. The multi-layer freeze-drying tray rack structure with adjustable spacing according to claim 4, characterized in that, The rectangular plate (13) is slidably connected to the top and bottom of the outer frame (1) at its upper and lower ends respectively. There are six slide grooves (14), all of which are inclined. The six slide grooves (14) are symmetrically arranged in groups of three on the upper and lower parts of the rectangular plate (13).

6. The multi-layer freeze-drying tray structure with adjustable spacing according to claim 5, characterized in that, The right end of the connecting block (15) is fixedly connected to the left side of the sliding layer (4) on the left side. The front and rear sides of the lead screw (17) are rotatably connected to the left side of the outer frame (1) through the rotating seat. A knob is provided at the front end of the lead screw (17).

7. The multi-layer freeze-drying tray structure with adjustable spacing according to claim 1, characterized in that, The number of sliding layers (4) is twelve, and the twelve sliding layers (4) are equidistantly and symmetrically connected to the left and right sides inside the outer frame (1) in groups of six.

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