Vacuum drying apparatus using microwave heating

Abstract

The application relates to the technical field of drying equipment, and discloses a vacuum drying equipment utilizing microwave heating, which comprises a vacuum drying tank, fixed shafts are arranged on the tank body and the tank cover of the vacuum drying tank, transmission rods are movably arranged on the inner sides of the two groups of fixed shafts, two groups of rotating frames are fixedly arranged on the outer sides of the transmission rods, six groups of square rods are movably arranged in a circular manner on the inner sides of the rotating frames, connecting heads are fixedly arranged at one ends of the six groups of square rods, six groups of transposition mechanisms are arranged between the two groups of rotating frames, gear ring frames are fixedly arranged at opposite ends of the two groups of fixed shafts, and the transposition mechanism comprises a fixed cylinder movably arranged in the connecting head. The vacuum drying equipment utilizing microwave heating is used in cooperation, eight groups of trays are sequentially rotated along eight groups of chain wheels through microwave radiation areas, and the problem of local overheating caused by microwave standing waves and uneven drying of dry materials is avoided.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, and in particular to a vacuum drying device that utilizes microwave heating. Background Technology

[0002] Microwave-heated vacuum drying equipment primarily operates within a sealed vacuum chamber. Utilizing a microwave field, it induces high-frequency resonance and friction between water molecules within the material, generating heat that is then conducted from the material's interior to the exterior. The vacuum environment within the chamber significantly lowers the vaporization boiling point of water, achieving low-temperature dehydration and drying. This effectively avoids problems such as oxidation, denaturation, and deterioration of heat-sensitive materials due to excessively high temperatures. This method eliminates the need for external heat conduction, resulting in rapid drying and better preservation of the material's original active ingredients, color, and quality.

[0003] For example, Chinese patent CN202511460615.7 discloses a vacuum freeze-drying device and control method for alternating hot fluorine melting and ice drying. However, in this device, multiple sets of trays are stacked and fixedly installed. The trays cannot rotate, and the material cannot receive microwave radiation alternately. This easily leads to local overheating and uneven drying due to the microwave standing wave effect. The space for water vapor to precipitate from the material is fixed, resulting in poor dehumidification and low overall drying efficiency.

[0004] Furthermore, in related technologies, such as Chinese patent CN202211681913.5, a vacuum drying device for preparing crude cefronin, the structure uses a rotating frame with multiple trays. This arrangement restricts the utilization of internal space, resulting in low loading capacity and limited equipment output. Both of these structures struggle to simultaneously meet the requirements of high loading capacity and uniform drying. Summary of the Invention

[0005] The main objective of this invention is to provide a vacuum drying device that utilizes microwave heating, which can effectively solve the problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A vacuum drying device using microwave heating includes a vacuum drying tank. Fixed shafts are fixedly installed on both the tank body and the tank lid. Transmission rods are movably installed on the inner sides of the two sets of fixed shafts. Two sets of rotating frames are fixedly installed on the outer sides of the transmission rods. Six sets of square rods are movably installed in a circular pattern on the inner side of each rotating frame. A connector is fixedly installed at one end of each of the six sets of square rods. Six sets of shifting mechanisms are provided between the two sets of rotating frames. A toothed ring frame is fixedly installed at the opposite ends of the two sets of fixed shafts. The switching mechanism includes a fixed cylinder movably disposed in the connector. A drive shaft is fixedly disposed on the outer side of the fixed cylinder near both ends of the connector. A bracket is fixedly disposed on both sides between the fixed cylinders. Eight sets of connecting rods are movably disposed on the inner walls of both sides of the bracket. One set of connecting rods corresponding to the fixed cylinder is extended and passes through the interior of the bracket and the fixed cylinder. A sprocket is fixedly disposed on the outer side of each set of connecting rods. A chain is fitted on the outer side of each of the eight sets of sprockets on the same side. Eight sets of connecting shafts are fixedly disposed on the chain. A connecting plate is movably disposed on the outer side of each of the eight sets of connecting shafts. A tray is fixedly disposed on both sides between the connecting plates. A ratchet is fixedly disposed on one side of the extended connecting rod. A gear ring is fixedly disposed on the outer side of the ratchet. A positioning component is disposed on the outer side of one set of the two sets of drive shafts.

[0007] Preferably, a material window is fixedly provided on the front side of the vacuum drying tank, and a door is installed on the material window. Each set of square rods has an ear seat fixedly provided at the upper and lower ends. A positioning rod is movably provided on the inner side of each set of ear seats. A spring is fixedly provided between each set of positioning rods and the connector. A notch is provided on the rod of the rotating frame corresponding to one end of the positioning rod.

[0008] Preferably, the positioning component includes a collar fitted around the outside of a set of drive shafts, a retaining strip fixedly provided on the inner wall of the collar, a retaining groove provided on the drive shaft corresponding to the inner side of the collar, two sets of round rods fixedly provided on the side of the collar away from the retaining strip, a limit ring fixedly provided on the outer side of the two sets of round rods, and a spring two fixedly provided between the collar and the connector.

[0009] Preferably, the gear ring frame is meshed with six sets of gear rings, the two sets of transmission shafts on the outside of the fixed cylinder are restricted to the outside of the connector, and one set of the extended connecting rods is located at the middle position with the upper side of the bracket. Each set of the connecting rods is connected to the bracket through a bearing.

[0010] Preferably, each set of sprockets is engaged with a chain, the connecting shaft is located at the middle of the upper side of the connecting plate, each set of connecting shafts is connected to the connecting plate through a bearing, the eight sets of trays are arranged in an orderly manner, and the inner gear of the ratchet is fixedly connected to the connecting rod.

[0011] Preferably, one side of the positioning rod is a hook-shaped structure, and the other side is a handle. The hook-shaped part of the positioning rod is inserted into the notch, and the spring is in a compressed state.

[0012] Preferably, the collar is movably disposed on the outside of the drive shaft, and the retaining strip is adapted to the retaining groove.

[0013] Preferably, the round rod passes through the inside of the connector and fits against one end of the rotating frame rod, and the second spring is in a stretched state.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Using existing drive equipment, the drive rod rotates clockwise, which in turn drives two sets of rotating frames and six sets of brackets to rotate, enabling each shifting mechanism to switch positions evenly within the tank. Simultaneously, since the gear ring and gear ring frame are meshed and the ratchet is unidirectionally rotating, the gear ring drives the internally connected extension rod to rotate. The rotating connecting rod drives the sprocket, which in turn drives the outer sleeved chain and the other seven sets of sprockets meshing with the chain to rotate. This causes the eight sets of trays connected to the chain to rotate orderly along the eight sets of sprockets through the microwave radiation area, avoiding local overheating and uneven drying caused by microwave standing waves. This is especially suitable for heat-sensitive materials, significantly improving drying consistency. In addition, the multi-layered planetary tray arrangement allows for a larger loading capacity within the same cavity volume, significantly increasing the loading capacity compared to a single large tray structure. It also continuously disturbs the rarefied gas within the cavity, preventing moisture from evaporating from the material from lingering on the surface of the material layer. 2. When the transmission rod and rotating frame are rotated by reverse drive, the gear ring and gear ring frame mesh only drive the gear ring and ratchet housing to rotate, and do not rotate the connecting rod connected to the inside, thereby stopping the rotation of the eight sets of trays and realizing two different drying methods.

[0015] 3. By opening the window and door, grasp the two sets of positioning rods on both sides and rotate them along the ear seat. Squeeze the spring one, and one side of the positioning rod will disengage from the notch. Then pull the square rod out of the rotating frame and pull it out from the window and door position. This makes it convenient to observe or pick up the materials in the tray.

[0016] 4. When the connector is pulled out of the rotating frame, the second spring in the stretched state pulls the round rod and the collar, while the round rod is restricted in the connector and the locking strip moves into the slot. When the bracket is pulled out, the bracket remains in a horizontal and vertical state. At this time, the slot and the locking strip correspond, and the locking strip will be locked in the slot, restricting the drive shaft, the fixed cylinder, and the bracket, preventing the bracket from shaking and making it inconvenient to pick up and put down the eight sets of pallets. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a vacuum drying device utilizing microwave heating according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a vacuum drying tank in a vacuum drying device utilizing microwave heating according to the present invention. Figure 3 This is a schematic diagram of the internal structure of a vacuum drying device utilizing microwave heating according to the present invention; Figure 4 This is a partially enlarged schematic diagram of the transposition mechanism of a vacuum drying device utilizing microwave heating according to the present invention. Figure 5This is a partial structural diagram of the transposition mechanism of a vacuum drying device utilizing microwave heating according to the present invention. Figure 1 ; Figure 6 This is a partial structural diagram of the transposition mechanism of a vacuum drying device utilizing microwave heating according to the present invention. Figure 2 ; Figure 7 This is a partial structural diagram of the transposition mechanism of a vacuum drying device utilizing microwave heating according to the present invention. Figure 3 ; Figure 8 This is a schematic diagram of the positioning component structure of a vacuum drying device utilizing microwave heating according to the present invention.

[0018] In the diagram: 1. Vacuum drying tank; 2. Fixed shaft; 3. Transmission rod; 4. Rotating frame; 41. Square rod; 42. Connector; 43. Ear seat; 44. Positioning rod; 45. Spring 1; 46. Notch; 5. Shifting mechanism; 51. Fixed cylinder; 52. Transmission shaft; 53. Bracket; 54. Connecting rod; 55. Sprocket; 56. Chain; 57. Connecting shaft; 58. Connecting plate; 59. Tray; 510. Ratchet; 511. Gear ring; 512. Positioning assembly; 5121. Collar; 5122. Locking strip; 5123. Locking groove; 5124. Round rod; 5125. Limiting ring; 5126. Spring 2; 6. Gear ring frame; 7. Tank material window; 8. Window / door. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] Please see Figures 1-8An embodiment of the present invention provides a vacuum drying device using microwave heating, comprising a vacuum drying tank 1. Fixed shafts 2 are fixedly installed on both the tank body and the tank cover of the vacuum drying tank 1. Transmission rods 3 are movably installed on the inner sides of the two sets of fixed shafts 2. Two sets of rotating frames 4 are fixedly installed on the outer sides of the transmission rods 3. Six sets of square rods 41 are movably installed in a circular distribution on the inner side of the rotating frames 4. A connector 42 is fixedly installed at one end of each of the six sets of square rods 41. Six sets of shifting mechanisms 5 are provided between the two sets of rotating frames 4. A toothed ring frame 6 is fixedly installed at the opposite ends of the two sets of fixed shafts 2. The shifting mechanism 5 includes a fixed cylinder 51 movably disposed in the connector 42. A drive shaft 52 is fixedly disposed on both sides of the fixed cylinder 51 near the connector 42. A bracket 53 is fixedly disposed between the two sides of the fixed cylinder 51. Eight sets of connecting rods 54 are movably disposed in the inner walls of both sides of the bracket 53. One set of connecting rods 54 corresponding to the fixed cylinder 51 is extended and passes through the interior of the bracket 53 and the fixed cylinder 51. A sprocket 55 is fixedly disposed on the outside of each set of connecting rods 54. A chain 56 is sleeved on the outside of the eight sets of sprockets 55 on the same side. Eight sets of connecting shafts 57 are fixedly disposed on the chain 56. A connecting plate 58 is movably disposed on the outside of each set of connecting shafts 57. A tray 59 is fixedly disposed between the two sides of the connecting plate 58. A ratchet 510 is fixedly disposed on one side of the extended connecting rod 54. A gear ring 511 is fixedly disposed on the outside of the ratchet 510. A positioning component 512 is disposed on the outside of one set of the two sets of drive shafts 52.

[0022] The gear ring frame 6 is meshed with six sets of gear rings 511. Two sets of drive shafts 52 are set on the outside of the fixed cylinder 51 and restricted to the outside of the connector 42. One set of extended connecting rods 54 is set at the middle position on the upper side of the bracket 53. Each set of connecting rods 54 is connected to the bracket 53 through bearings. Each set of sprockets 55 is meshed with the chain 56. The connecting shaft 57 is located at the middle position on the upper side of the connecting plate 58. Each set of connecting shafts 57 is connected to the connecting plate 58 through bearings. Eight sets of trays 59 are arranged in an orderly manner. The inner gear of the ratchet 510 is fixedly connected to the connecting rod 54.

[0023] Furthermore, using the existing drive equipment, the drive rod 3 rotates clockwise, which in turn drives the two sets of rotating frames 4 and the six sets of brackets 53 to rotate, enabling each set of switching mechanisms 5 to switch positions evenly within the tank. Simultaneously, since the gear ring 511 and gear ring frame 6 are meshed, and the ratchet 510 is unidirectionally rotating, the gear ring 511 drives the internally connected extension connecting rod 54 to rotate. The rotating connecting rod 54 drives the sprocket 55, which in turn drives the outer sleeved chain 56 and the other seven sets of sprockets 55 meshing with the chain 56 to rotate, causing the eight sets of trays 59 connected to the chain 56 to move orderly along the eight sets of sprockets 55. The rotating mechanism passes through the microwave radiation area, avoiding localized overheating and uneven drying caused by microwave standing waves. This is especially suitable for heat-sensitive materials, significantly improving drying consistency. At the same time, the multi-layered planetary trays 59 allow for a larger loading capacity within the same cavity volume, significantly increasing the loading capacity compared to a single large tray structure. The continuous disturbance of the rarefied gas inside the cavity prevents moisture from evaporating from the material from lingering on the surface of the material layer. Furthermore, when the drive rod 3 and rotating frame 4 rotate in the reverse direction, the gear ring 511 meshes with the gear ring frame 6, driving only the gear ring 511 and the ratchet 510 housing to rotate, without rotating the connecting rod 54 connected to the inner side. This stops the rotation of the eight sets of trays 59, enabling two different drying methods to operate.

[0024] A material window 7 is fixedly installed on the front side of the vacuum drying tank 1. The material window 7 is equipped with a door 8. Each set of square rods 41 has an ear seat 43 fixedly installed at the upper and lower ends. A positioning rod 44 is movably installed on the inner side of each set of ear seats 43. A spring 45 is fixedly installed between each set of positioning rods 44 and the connector 42. A notch 46 is opened on the rod of the rotating frame 4 at one end corresponding to the positioning rod 44.

[0025] The positioning rod 44 has a hook-shaped structure on one side and a handle on the other side. The hook-shaped part of the positioning rod 44 is inserted into the notch 46, and the spring 45 is in a compressed state.

[0026] Furthermore, by opening the window 8, holding the two sets of positioning rods 44 on both sides and rotating them along the ear seat 43, the spring 45 is squeezed, and one side of the positioning rod 44 is disengaged from the notch 46. Then, the square rod 41 is pulled out from the rotating frame 4 and pulled out from the position of the window 8, which makes it convenient to observe or pick up the materials in the tray 59.

[0027] The positioning assembly 512 includes a collar 5121 that is sleeved on the outside of a set of drive shafts 52. A retaining strip 5122 is fixedly provided on the inner wall of the collar 5121. A retaining groove 5123 is provided on the drive shaft 52 corresponding to the inner side of the collar 5121. Two sets of round rods 5124 are fixedly provided on the side of the collar 5121 away from the retaining strip 5122. A limit ring 5125 is fixedly provided on the outside of the two sets of round rods 5124. A spring 5126 is fixedly provided between the collar 5121 and the connector 42.

[0028] The collar 5121 is movably set on the outside of the drive shaft 52, the retaining strip 5122 is adapted to the retaining groove 5123, the round rod 5124 passes through the inside of the connector 42 and fits against one end of the rotating frame 4 rod, and the spring 5126 is in a stretched state.

[0029] Furthermore, when the connector 42 is pulled out of the rotating frame 4, the stretched spring 5126 pulls the round rod 5124 and the collar 5121. The round rod 5124 is confined in the connector 42, and the retaining strip 5122 moves into the retaining groove 5123. When the bracket 53 is pulled outward, the bracket 53 remains in a horizontal and vertical state. At this time, the retaining groove 5123 corresponds to the retaining strip 5122, and the retaining strip 5122 will be engaged in the retaining groove 5123, which restricts the drive shaft 52, the fixed cylinder 51, and the bracket 53, preventing the bracket 53 from shaking and making it inconvenient to pick up and put down the eight sets of trays 59.

[0030] In this embodiment: First, the existing drive device drives the transmission rod 3 to rotate clockwise. The rotating transmission rod 3 drives the two sets of rotating frames 4 and the six sets of brackets 53 to rotate, so that each set of switching mechanisms 5 can switch positions evenly inside the tank. At the same time, since the gear ring 511 and the gear ring frame 6 are meshed, and the ratchet 510 is unidirectionally rotating, the gear ring 511 drives the internally connected extension connecting rod 54 to rotate. The rotating connecting rod 54 drives the sprocket 55, which drives the outer sleeved chain 56 and the other seven sets of sprockets 55 meshing with the chain 56 to rotate, so that the eight sets of trays 59 connected to the chain 56 move in an orderly manner along the eight sets of sprockets. The rotation of the 55 trays passes through the microwave radiation area, avoiding local overheating and uneven drying caused by microwave standing waves. This is especially suitable for heat-sensitive materials, significantly improving drying consistency. At the same time, the multi-layered planetary trays 59 allow for a larger loading capacity within the same cavity volume, significantly increasing the loading capacity compared to a single large tray structure. This continuously disturbs the rarefied gas inside the cavity, preventing moisture from evaporating from the material from lingering on the material surface. Furthermore, when the reverse drive transmission rod 3 and the rotating frame 4 rotate, the gear ring 511 meshes with the gear ring frame 6, driving only the gear ring 511 and the ratchet 510 housing to rotate, without rotating the inner connecting rod 54. This stops the rotation of the eight trays 59, enabling two different drying methods to operate.

[0031] Secondly, by opening the window 8, holding the two sets of positioning rods 44 on both sides and rotating them along the ear seat 43, the spring 45 is squeezed, and one side of the positioning rod 44 is disengaged from the notch 46. Then, the square rod 41 is pulled out from the rotating frame 4 and pulled out from the position of the window 8, which makes it convenient to observe or pick up the materials in the tray 59.

[0032] Subsequently, when the connector 42 is pulled out of the rotating frame 4, the stretched spring 5126 pulls the round rod 5124 and the collar 5121. The round rod 5124 is confined in the connector 42, and the retaining strip 5122 moves into the retaining groove 5123. When the bracket 53 is pulled outward, the bracket 53 remains in a horizontal and vertical state. At this time, the retaining groove 5123 corresponds to the retaining strip 5122, and the retaining strip 5122 will be engaged in the retaining groove 5123, which restricts the drive shaft 52, the fixed cylinder 51, and the bracket 53, preventing the bracket 53 from shaking and making it inconvenient to pick up and put down the eight sets of trays 59.

[0033] The control and connection methods of the electronic equipment and vacuum drying tank structure in this invention are common knowledge in the field. Their working principles are well-known technologies, and the appropriate model should be selected according to actual use. They will not be elaborated further here.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum drying apparatus utilizing microwave heating, comprising a vacuum drying tank (1), characterized in that: The vacuum drying tank (1) is fixedly equipped with fixed shafts (2) on both the tank body and the tank cover. The inner sides of the two sets of fixed shafts (2) are movably equipped with transmission rods (3). The outer sides of the transmission rods (3) are fixedly equipped with two sets of rotating frames (4). The inner sides of the rotating frames (4) are movably equipped with six sets of square rods (41) arranged in a circular pattern. One end of each of the six sets of square rods (41) is fixedly equipped with a connector (42). The two sets of rotating frames (4) are equipped with six sets of shifting mechanisms (5). The opposite ends of the two sets of fixed shafts (2) are fixedly equipped with toothed ring frames (6). The switching mechanism (5) includes a fixed cylinder (51) movably disposed in the connector (42). A drive shaft (52) is fixedly disposed on both sides of the fixed cylinder (51) near both ends of the connector (42). A bracket (53) is fixedly disposed on both sides between the fixed cylinder (51). Eight sets of connecting rods (54) are movably disposed on the inner walls of both sides of the bracket (53). One set of connecting rods (54) corresponding to the fixed cylinder (51) is extended and passes through the interior of the bracket (53) and the fixed cylinder (51). Each set of connecting rods (54) has a fixed outer side... A sprocket (55) is provided, and a chain (56) is fitted on the outer side of each of the eight sets of sprockets (55) on the same side. Eight sets of connecting shafts (57) are fixedly provided on the chain (56), and connecting plates (58) are movably provided on the outer side of each of the eight sets of connecting shafts (57). A tray (59) is fixedly provided between the connecting plates (58) on both sides. A ratchet (510) is fixedly provided on one side of the extended connecting rod (54), and a gear ring (511) is fixedly provided on the outer side of the ratchet (510). A positioning component (512) is provided on the outer side of one of the two sets of transmission shafts (52).

2. The vacuum drying equipment using microwave heating according to claim 1, characterized in that: The vacuum drying tank (1) is fixedly provided with a tank material window (7) on the front side. The tank material window (7) is equipped with a door (8). Each set of square rods (41) is fixedly provided with an ear seat (43) at the upper and lower ends. The inner side of each set of ear seats (43) is movably provided with a positioning rod (44). A spring (45) is fixedly provided between each set of positioning rods (44) and the connector (42). A notch (46) is opened on the rod of the rotating frame (4) corresponding to one end of the positioning rod (44).

3. The vacuum drying equipment utilizing microwave heating according to claim 2, characterized in that: The positioning component (512) includes a collar (5121) sleeved on the outside of a set of drive shafts (52). A retaining strip (5122) is fixedly provided on the inner wall of the collar (5121). A retaining groove (5123) is provided on the drive shaft (52) corresponding to the inner side of the collar (5121). Two sets of round rods (5124) are fixedly provided on the side of the collar (5121) away from the retaining strip (5122). Limiting rings (5125) are fixedly provided on the outer side of the two sets of round rods (5124). A spring (5126) is fixedly provided between the collar (5121) and the connector (42).

4. The vacuum drying equipment utilizing microwave heating according to claim 1, characterized in that: The gear ring frame (6) is meshed with six sets of gear rings (511). Two sets of transmission shafts (52) are set on the outside of the fixed cylinder (51) and restricted to the outside of the connector (42). One set of the extended connecting rods (54) is set at the middle position on the upper side of the bracket (53). Each set of the connecting rods (54) is connected to the bracket (53) through a bearing.

5. A vacuum drying apparatus utilizing microwave heating according to claim 1, characterized in that: Each set of sprockets (55) is meshed with the chain (56), the connecting shaft (57) is located in the middle of the upper side of the connecting plate (58), each set of connecting shafts (57) is connected to the connecting plate (58) through bearings, the eight sets of trays (59) are arranged in an orderly manner, and the inner gear of the ratchet (510) is fixedly connected to the connecting rod (54).

6. A vacuum drying apparatus utilizing microwave heating according to claim 2, characterized in that: The positioning rod (44) has a hook-shaped structure on one side and a handle on the other side. The hook-shaped part of the positioning rod (44) is inserted into the notch (46), and the spring (45) is in a compressed state.

7. A vacuum drying apparatus utilizing microwave heating according to claim 3, characterized in that: The collar (5121) is movably disposed on the outside of the drive shaft (52), and the retaining strip (5122) is adapted to the retaining groove (5123).

8. A vacuum drying apparatus using microwave heating according to claim 3, characterized in that: The round rod (5124) passes through the inside of the connector (42) and fits against one end of the rotating frame (4) rod, and the second spring (5126) is in a stretched state.

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