A vacuum drying oven for preparing beta-carotene powder

Abstract

The utility model is suitable for beta -carotene powder production technical field provides a kind of vacuum drying oven for preparing beta -carotene powder, including box;Drying cavity is opened in the other side of the box inside, inert gas input pipe and inert gas exhaust pipe extending to the box outside are respectively fixedly connected with the both sides of the top wall in the drying cavity, heating cavity is opened in the box inside the both sides of the drying cavity, the lower end of the one side in the box inside is fixedly connected with vacuum pump;The top end swing joint of rotating disc has powder storage barrel.This scheme provides the vacuum drying oven for preparing beta -carotene powder can utilize clamping assembly to be clamped fixed powder storage barrel, then utilize reduction motor to make rotating disc and powder storage barrel rotate, to cooperate agitating assembly to agitate the powdery material inside powder storage barrel, it is convenient for its dry processing, and agitating assembly can be called to apply different size powder storage barrel, improve its applicability.

Description

Technical Field

[0001] This invention belongs to the field of β-carotene powder production technology, and particularly relates to a vacuum drying oven for preparing β-carotene powder. Background Technology

[0002] Beta-carotene powder is a natural food-grade pigment with functions such as coloring, anti-oxidation, and nutritional enhancement. It is a precursor to vitamin A and can be converted into vitamin A in the body, which has the effects of protecting eyesight and anti-oxidation. However, it needs to be dried during its production and processing, so a vacuum drying oven is required.

[0003] Chinese patent CN208720637U discloses a vacuum drying oven for preparing β-carotene powder. The invention describes a drying oven comprising a body containing a drying chamber, an electric heating wire surrounding the drying chamber, a vacuum pump connected to the drying chamber, an inert gas inlet and an inert gas outlet, an electromagnetic pump connected to the inert gas inlet, and a controller electrically connected to the heating wire, vacuum pump, and electromagnetic pump. The drying oven has an inner rear wall with a first, second, and third rotating shaft rotatably connected to it. A square container is mounted on the first shaft, a square container on the second shaft, and a square container on the third shaft. Stepper motors 1, 2, and 3 are fixed to the inner rear wall. A disc-shaped container is located below the square container. This drying oven allows for multiple rotations and omnidirectional drying of samples, resulting in excellent drying effect, high efficiency, comprehensive functionality, and strong practicality.

[0004] However, the above method relies on multiple flipping and stirring to ensure uniform drying of the β-carotene powder. This means that the material can only be placed in a square container for conveying and flipping. However, the square container is of a fixed size, and the flipping process causes some of the material to be thrown up, resulting in dirt inside the box and increasing the difficulty of cleaning for subsequent personnel. Therefore, it is necessary to design a vacuum drying oven for preparing β-carotene powder. Utility Model Content

[0005] This invention provides a vacuum drying oven for preparing β-carotene powder, aiming to solve the problem that some currently used vacuum drying ovens are inconvenient for stirring and drying materials of different quantities.

[0006] This invention is implemented as follows: a vacuum drying oven for preparing β-carotene powder includes a box body; a controller fixedly connected to one side of the front of the box body, and a door fixedly connected to the other side of the front of the box body via a hinge; a drying chamber opened on the other side of the interior of the box body, with an inert gas input pipe and an inert gas exhaust pipe fixedly connected to both sides of the top wall of the drying chamber, extending to the outside of the box body; a temperature sensor fixedly connected to the upper end of the inner wall of the drying chamber; heating chambers opened inside the box body on both sides of the drying chamber, with heating pipes fixedly connected to the inner walls of the heating chambers; and a door fixedly connected to the lower end of one side of the interior of the box body. A vacuum pump is connected, with its input end communicating with the interior of the drying chamber via a conduit; a filter assembly is mounted on the lower end of the inner wall of the drying chamber to prevent powdery materials from being sucked into the vacuum pump; a geared motor is fixedly connected to the lower end of the chamber, with its output end extending into the drying chamber and fixedly connected to a rotating disk via a coupling; a powder storage bin is movably connected to the top of the rotating disk; a clamping assembly is mounted on the top of the rotating disk to clamp and fix the powder storage bin; and an agitator is mounted inside the drying chamber to facilitate the turning of the powder storage bin.

[0007] The agitation assembly includes: a pneumatic telescopic rod fixedly connected to the top of the housing, the output end of the pneumatic telescopic rod extending into the interior of the drying chamber and fixedly connected to a fixing frame, and an agitation frame provided on one side of the fixing frame.

[0008] Preferably, the fixed frame is in the shape of an inverted F, and the stirring frame is in the shape of an inverted T.

[0009] Preferably, an adjustment structure is provided between the fixed frame and the stirring frame. The adjustment structure is used to realize the sliding adjustment between the fixed frame and the stirring frame. The adjustment structure includes: a sliding groove formed on one side of the fixed frame, and a positioning groove formed inside the fixed frame at one end of the sliding groove; a positioning block slidably connected inside the positioning groove, one end of the positioning block extending into the interior of the sliding groove, and a pull rod extending out of the positioning groove fixedly connected to the other ends of the two positioning blocks, the pull rod being C-shaped; a positioning spring wound around one end of the surface of the pull rod, the two ends of the positioning spring being fixedly connected to the inner wall of the positioning groove and one end of the positioning block, respectively; and a sliding rod fixedly connected to one side of the stirring frame, one end of the sliding rod having positioning holes at equal intervals that engage with one end of the positioning block.

[0010] Preferably, the sliding rod and the interior of the sliding groove form a sliding structure, and the sliding rod and the sliding groove are I-shaped.

[0011] Preferably, the bottom end of the rotating disk is provided with an auxiliary groove in an annular shape, and the bottom wall of the drying chamber is fixedly connected at an equal angle with an auxiliary block that slides and engages with the inside of the auxiliary groove.

[0012] Preferably, the clamping assembly includes: a fixing groove symmetrically formed on both sides of the top of the rotating disk, a threaded rod rotatably connected to the inner wall of the fixing groove, a rotating handle extending to the outside of the rotating disk fixedly connected to one end of the threaded rod; a threaded block threadedly connected to the surface of the threaded rod, a clamping plate fixedly connected to the top of the threaded block, and a rubber pad fixedly connected to one side of the clamping plate.

[0013] Preferably, the temperature sensor includes: a filter frame fixedly connected to the lower end of the inner wall of the drying chamber, the filter frame being connected to the input end of the vacuum pump, and a slot being provided on the inner wall of the filter frame; a dustproof net being engaged with the inside of the slot, and limiting blocks being fixedly connected to both ends of the top of the dustproof net.

[0014] Preferably, the filter frame is U-shaped, and one side of the bottom wall of the filter frame is inclined.

[0015] Preferably, the limiting block is in the shape of an inverted L, and the limiting block and the top of the filter frame form an engaging structure.

[0016] Preferably, the heating tube is serpentine in shape, and the top end of the heating tube is fixedly connected to the inner wall of the heating cavity by bolts.

[0017] Compared with related technologies, the vacuum drying oven for preparing β-carotene powder provided by this utility model has the following beneficial effects:

[0018] 1. By setting an adjustable stirring component, it is easy to adapt to powder storage bins of different diameters. Then, the clamping component is used to clamp and fix the powder storage bin at the top of the rotating disk. Then, the geared motor works to make the powder storage bin rotate, which, together with the fixing frame and stirring frame, slowly stirs the material inside the powder storage bin, so that the material is heated more evenly, improving its drying uniformity and drying efficiency. The slow rotation of the powder storage bin also makes it less likely for powdered material to be blown up, which would make cleaning inside the drying chamber inconvenient. At the same time, different sized powder storage bins can be replaced to adapt to the drying and processing of different amounts of β-carotene powder, improving its practicality.

[0019] 2. The dustproof net effectively prevents powdery materials inside the powder storage bin from being accidentally stirred up and sucked into the vacuum pump during operation, thus avoiding damage to the equipment. It achieves dust filtration and prevention. The bottom of the filter frame is sloping, which makes it difficult for the dust filtered by the dustproof net to accumulate on the bottom wall of the filter frame, making it easier for the staff to clean it later. At the same time, the plug-in dustproof net can be slid off for cleaning and to prevent clogging after the drying operation is completed. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention;

[0021] Figure 2 This is a partial bottom-view exploded structure diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the present invention after the rotating disk is removed;

[0023] Figure 4 This is a partial cross-sectional exploded view of the rotating disk of this utility model;

[0024] Figure 5 This is a partial cross-sectional exploded view of the fixing frame of this utility model;

[0025] Figure 6 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 7 For the present utility model Figure 5 Enlarged structural diagram at point B.

[0027] In the diagram: 1. Inert gas exhaust pipe; 2. Agitator assembly; 201. Fixing frame; 202. Pneumatic telescopic rod; 203. Pulling rod; 204. Agitator frame; 205. Positioning hole; 206. Sliding rod; 207. Sliding groove; 208. Positioning groove; 209. Positioning spring; 210. Positioning block; 3. Inert gas input pipe; 4. Temperature sensor; 5. Controller; 6. Filter assembly; 601. Slot; 602. Filter... Filter frame; 603, dustproof net; 604, limiting block; 7, housing; 8, clamping assembly; 801, clamping plate; 802, rubber pad; 803, fixing groove; 804, rotating handle; 805, threaded block; 806, threaded rod; 9, rotating disk; 10, door; 11, powder storage bin; 12, auxiliary block; 13, auxiliary groove; 14, vacuum pump; 15, geared motor; 16, heating tube; 17, heating chamber; 18, drying chamber. Detailed Implementation

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] Example 1

[0031] A preferred embodiment of the vacuum drying oven for preparing β-carotene powder provided by this invention is, for example... Figures 1 to 7 As shown: A vacuum drying oven for preparing β-carotene powder includes a chamber body 7; a controller 5 fixedly connected to one side of the front of the chamber body 7, and a door 10 fixedly connected to the other side of the front of the chamber body 7 via a hinge; a drying chamber 18 opened inside the chamber body 7 on the other side, with an inert gas inlet pipe 3 and an inert gas outlet pipe 1 fixedly connected to the two sides of the top wall of the drying chamber 18, respectively, extending to the outside of the chamber body 7; a temperature sensor 4 fixedly connected to the upper end of the inner wall of the drying chamber 18; heating chambers 17 opened inside the chamber body 7 on both sides of the drying chamber 18, with heating pipes 16 fixedly connected to the inner wall of the heating chamber 17; and a vacuum pump 1 fixedly connected to the lower end of one side of the chamber body 7. 4. The input end of the vacuum pump 14 is connected to the interior of the drying chamber 18 through a conduit; the filter assembly 6 is installed at the lower end of the inner wall of the drying chamber 18, and the filter assembly 6 is used to prevent powdery materials from being sucked into the vacuum pump 14; the geared motor 15 is fixedly connected to the lower end of the housing 7, and the output end of the geared motor 15 extends into the interior of the drying chamber 18 and is fixedly connected to the rotating disk 9 through a coupling, and the top of the rotating disk 9 is movably connected to the powder storage bin 11; the clamping assembly 8 is installed at the top of the rotating disk 9, and the clamping assembly 8 is used to clamp and fix the powder storage bin 11; the stirring assembly 2 is installed inside the drying chamber 18, and the stirring assembly 2 facilitates the turning of the powder storage bin 11.

[0032] The stirring assembly 2 includes: a pneumatic telescopic rod 202 fixedly connected to the top of the housing 7, the output end of the pneumatic telescopic rod 202 extending into the interior of the drying chamber 18 and fixedly connected to a fixing frame 201, and a stirring frame 204 provided on one side of the fixing frame 201.

[0033] It should be noted that some existing vacuum drying ovens used for preparing β-carotene powder still have certain shortcomings in actual use. They rely on multiple tumbling and stirring to ensure that the β-carotene powder is dried evenly. This means that the material can only be placed in a square container for conveying and tumbling. However, the square container is of a fixed size, and the material will be partially thrown up during the tumbling process, causing dirt inside the box and increasing the difficulty of cleaning for subsequent personnel.

[0034] In this embodiment, the door 10 is opened, and the storage container 11 containing β-carotene powder is placed on top of the rotating disk 9. Then, the sliding distance of the stirring rack 204 is adjusted to a suitable position according to the diameter of the storage container 11. Then, the pneumatic telescopic rod 202 is activated to lower the fixing frame 201 and the stirring rack 204 to a suitable depth inside the storage container 11. The door 10 is then closed. Afterward, the controller 5 operates the vacuum pump 14 to evacuate the drying chamber 18. The filter assembly 6 is used to prevent a small amount of powdery material from being sucked into the vacuum pump 14. When the air pressure inside the drying chamber 18 reaches a predetermined value, the heating tube 1 is activated. The drying chamber 18 is heated to dry the material inside the powder storage bin 11. An inert gas exhaust pipe 1 and an inert gas input pipe 3 are provided to allow nitrogen to be introduced and discharged, facilitating the removal of water vapor evaporated from the material during drying. At the same time, the geared motor 15 is started to rotate the rotating disk 9 and the powder storage bin 11, which, together with the fixed frame 201 and the stirring frame 204, slowly stirs the material inside the powder storage bin 11, making the material heat more evenly, improving its drying uniformity and efficiency. The slowly rotating powder storage bin 11 also prevents the powder from being blown up, thus avoiding the inconvenience of cleaning the inside of the drying chamber 18.

[0035] In a further preferred embodiment of this utility model, the fixed frame 201 is in the shape of an inverted F, and the stirring frame 204 is in the shape of an inverted T.

[0036] In this embodiment, the inverted F-shaped fixing frame 201 and the inverted T-shaped stirring frame 204 are used to facilitate better stirring of the material inside the powder storage tank 11.

[0037] In a further preferred embodiment of this utility model, an adjustment structure is provided between the fixed frame 201 and the stirring frame 204. The adjustment structure is used to realize the sliding adjustment between the fixed frame 201 and the stirring frame 204. The adjustment structure includes: a sliding groove 207 formed on one side of the fixed frame 201, and a positioning groove 208 formed inside the fixed frame 201 at one end of the sliding groove 207; and a positioning block 210 slidably connected inside the positioning groove 208, with one end of the positioning block 210 extending into the interior of the sliding groove 207. The other ends of the two positioning blocks 210 are fixedly connected to a pull rod 203 extending to the outside of the positioning groove 208. The pull rod 203 is C-shaped. A positioning spring 209 is wound around one end of the surface of the pull rod 203. The two ends of the positioning spring 209 are fixedly connected to the inner wall of the positioning groove 208 and one end of the positioning block 210, respectively. A sliding rod 206 is fixedly connected to one side of the stirring frame 204. One end of the sliding rod 206 is provided with positioning holes 205 at equal intervals that engage with one end of the positioning block 210.

[0038] In this embodiment, by pulling the pulling rod 203, the positioning block 210 is slid and the positioning spring 209 is compressed until it is completely disengaged from the inside of the positioning hole 205. Then, the stirring frame 204 is pulled to slide the sliding rod 206 to a suitable length. After that, the pulling rod 203 is released. Using the elastic force of the positioning spring 209, the positioning block 210 is locked into the suitable positioning hole 205, thereby limiting and fixing the sliding rod 206 after it slides. This facilitates the stirring of materials in the powder storage tanks 11 of different diameters.

[0039] In a further preferred embodiment of the present invention, a sliding structure is formed between the sliding rod 206 and the sliding groove 207, and the sliding rod 206 and the sliding groove 207 are in the shape of an I-beam.

[0040] In this embodiment, the smoothness of the sliding adjustment of the agitator 204 is improved by utilizing the sliding between the I-shaped sliding rod 206 and the sliding groove 207.

[0041] In a further preferred embodiment of the present invention, an auxiliary groove 13 is provided annularly at the bottom end of the rotating disk 9, and an auxiliary block 12 is fixedly connected at an equal angle to the bottom wall of the drying chamber 18, which slides and cooperates with the interior of the auxiliary groove 13.

[0042] In this embodiment, the sliding between the auxiliary block 12 and the auxiliary groove 13 facilitates the support of the rotating disk 9 and improves the stability of the rotation of the rotating disk 9.

[0043] In a further preferred embodiment of the present invention, the clamping assembly 8 includes: a fixing groove 803 symmetrically opened on both sides of the top of the rotating disk 9, a threaded rod 806 rotatably connected to the inner wall of the fixing groove 803, a rotating handle 804 extending to the outside of the rotating disk 9 fixedly connected to one end of the threaded rod 806; a threaded block 805 threadedly connected to the surface of the threaded rod 806, a clamping plate 801 fixedly connected to the top of the threaded block 805, and a rubber pad 802 fixedly connected to one side of the clamping plate 801.

[0044] In this embodiment, the threaded rod 806 is rotated by rotating the handle 804. The threaded engagement between the threaded rod 806 and the threaded block 805 causes the threaded block 805 to slide, thereby causing the clamping plate 801 to slide. The powder storage bucket 11 is then flexibly clamped and fixed by the rubber pad 802.

[0045] Example 2

[0046] Based on Example 1, a preferred embodiment of the vacuum drying oven for preparing β-carotene powder provided by this invention is as follows: Figures 1 to 7As shown: Temperature sensor 4 includes: a filter frame 602 fixedly connected to the lower end of the inner wall of drying chamber 18, the filter frame 602 being connected to the input end of vacuum pump 14, and a slot 601 being provided on the inner wall of filter frame 602; a dustproof net 603 being engaged and connected inside the slot 601, and limit blocks 604 being fixedly connected to both ends of the top of dustproof net 603.

[0047] In this embodiment, the dustproof net 603 can effectively prevent the powdery material inside the powder storage tank 11 from being accidentally lifted and sucked into the vacuum pump 14 when the vacuum pump 14 is working, thus avoiding damage to the equipment. After the drying operation is completed, the dustproof net 603 can be pushed upwards until it is completely detached from the slot 601, so that the dustproof net 603 can be disassembled and cleaned. When installing, the dustproof net 603 can be inserted into the slot 601.

[0048] In a further preferred embodiment of the present invention, the filter frame 602 is U-shaped, and one side of the inner bottom wall of the filter frame 602 is inclined.

[0049] In this embodiment, the bottom of the filter frame 602 is inclined, which makes it difficult for the dust material filtered by the dust screen 603 to accumulate on the bottom wall of the filter frame 602, making it easier for staff to clean it later.

[0050] In a further preferred embodiment of the present invention, the limiting block 604 is inverted L-shaped, and the limiting block 604 and the top of the filter frame 602 form an engaging structure.

[0051] In this embodiment, the engagement between the limiting block 604 and the filter frame 602 is used to improve the firmness and stability of the dustproof net 603 after it is inserted.

[0052] In a further preferred embodiment of this utility model, the heating tube 16 is serpentine in shape, and the top end of the heating tube 16 is fixedly connected to the inner wall of the heating cavity 17 by bolts.

[0053] In this embodiment, the serpentine heating tube 16 is used to increase the heating area, reduce heating dead zones, and facilitate the heating and drying process inside the drying chamber 18.

[0054] In summary, the stirring component 2, the rotating disk 9, and the reduction motor 15 facilitate the stirring of the powder material inside the powder storage tank 11, and the filter component 6 prevents the powder material from being sucked into the vacuum pump 14. At the same time, the clamping component 8 can firmly clamp and fix the powder storage tank 11 at the top of the rotating disk 9.

[0055] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0056] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0057] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A vacuum drying oven for preparing β-carotene powder, characterized in that, include: Box (7); A controller (5) is fixedly connected to one side of the front of the box (7), and a door (10) is fixedly connected to the other side of the front of the box (7) via a hinge; A drying chamber (18) is opened on the other side of the box (7). An inert gas input pipe (3) and an inert gas discharge pipe (1) extending to the outside of the box (7) are fixedly connected to the two sides of the top wall of the drying chamber (18). A temperature sensor (4) is fixedly connected to the upper end of the inner wall of the drying chamber (18). A heating chamber (17) is opened inside the box (7) on both sides of the drying chamber (18). A heating pipe (16) is fixedly connected to the inner wall of the heating chamber (17). A vacuum pump (14) is fixedly connected to the lower end of one side of the box (7). The input end of the vacuum pump (14) is connected to the inside of the drying chamber (18) through a conduit. A filter assembly (6) is installed at the lower end of the inner wall of the drying chamber (18), the filter assembly (6) is used to prevent powdery materials from being sucked into the interior of the vacuum pump (14); A geared motor (15) is fixedly connected to the lower end of the box (7). The output end of the geared motor (15) extends into the interior of the drying chamber (18) and is fixedly connected to a rotating disk (9) via a coupling. A powder storage bucket (11) is movably connected to the top of the rotating disk (9). The clamping assembly (8) is mounted on the top of the rotating disk (9) and is used to clamp and fix the powder storage bucket (11). The stirring assembly (2) is installed inside the drying chamber (18), which facilitates the turning of the powder storage tank (11); The agitation component (2) includes: A pneumatic telescopic rod (202) is fixedly connected to the top of the box (7). The output end of the pneumatic telescopic rod (202) extends into the interior of the drying chamber (18) and is fixedly connected to a fixing frame (201). An agitator (204) is provided on one side of the fixing frame (201).

2. The vacuum drying oven for preparing β-carotene powder as described in claim 1, characterized in that, The fixed frame (201) is in the shape of an inverted F, and the stirring frame (204) is in the shape of an inverted T.

3. The vacuum drying oven for preparing β-carotene powder as described in claim 1, characterized in that, An adjustment structure is provided between the fixed frame (201) and the stirring frame (204). The adjustment structure is used to realize the sliding adjustment between the fixed frame (201) and the stirring frame (204). The adjustment structure includes: A sliding groove (207) is formed on one side of the fixed frame (201), and a positioning groove (208) is formed inside the fixed frame (201) at one end of the sliding groove (207); A positioning block (210) is slidably connected inside the positioning groove (208). One end of the positioning block (210) extends into the interior of the sliding groove (207). The other ends of the two positioning blocks (210) are fixedly connected to a pull rod (203) extending to the outside of the positioning groove (208). The pull rod (203) is C-shaped. A positioning spring (209) is wound around one end of the surface of the pull rod (203), and the two ends of the positioning spring (209) are fixedly connected to the inner wall of the positioning groove (208) and one end of the positioning block (210), respectively. A sliding rod (206) is fixedly connected to one side of the stirring frame (204), and one end of the sliding rod (206) is provided with positioning holes (205) that engage with one end of the positioning block (210).

4. The vacuum drying oven for preparing β-carotene powder as described in claim 3, characterized in that, The sliding rod (206) and the interior of the sliding groove (207) form a sliding structure, and the sliding rod (206) and the sliding groove (207) are in the shape of an I-beam.

5. The vacuum drying oven for preparing β-carotene powder as described in claim 1, characterized in that, The bottom end of the rotating disk (9) is provided with an auxiliary groove (13) in an annular shape, and the bottom wall of the drying chamber (18) is fixedly connected with an auxiliary block (12) that slides and cooperates with the inside of the auxiliary groove (13).

6. The vacuum drying oven for preparing β-carotene powder as described in claim 1, characterized in that, The clamping assembly (8) includes: A fixing groove (803) is symmetrically opened on both sides of the top of the rotating disk (9). A threaded rod (806) is rotatably connected to the inner wall of the fixing groove (803). One end of the threaded rod (806) is fixedly connected to a handle (804) extending to the outside of the rotating disk (9). A threaded block (805) is threaded onto the surface of the threaded rod (806). A clamping plate (801) is fixedly connected to the top of the threaded block (805), and a rubber pad (802) is fixedly connected to one side of the clamping plate (801).

7. The vacuum drying oven for preparing β-carotene powder as described in claim 1, characterized in that, The temperature sensor (4) includes: A filter frame (602) is fixedly connected to the lower end of the inner wall of the drying chamber (18). The filter frame (602) is connected to the input end of the vacuum pump (14). A slot (601) is provided on the inner wall of the filter frame (602). A dustproof net (603) is engaged inside the slot (601), and limit blocks (604) are fixedly connected to both ends of the top of the dustproof net (603).

8. The vacuum drying oven for preparing β-carotene powder as described in claim 7, characterized in that, The filter frame (602) is U-shaped, and one side of the inner bottom wall of the filter frame (602) is inclined.

9. The vacuum drying oven for preparing β-carotene powder as described in claim 7, characterized in that, The limiting block (604) is in the shape of an inverted L, and the limiting block (604) and the top of the filter frame (602) form an engaging structure.

10. The vacuum drying oven for preparing β-carotene powder as described in claim 1, characterized in that, The heating tube (16) is serpentine in shape, and the top end of the heating tube (16) is fixedly connected to the inner wall of the heating cavity (17) by bolts.

Images