Vacuum drying oven with inert gas preheating function

Abstract

The invention relates to the technical field of vacuum drying boxes, and discloses a vacuum drying box with an inert gas preheating function, which comprises a vacuum drying box main body, a box door is hinged to the front surface of the vacuum drying box main body, and a heat preservation layer is arranged in the inner wall of the vacuum drying box main body. According to the vacuum drying box with the inert gas preheating function, the preheating box is fixed to the middle layer of the three-layer cabinet body, when the vacuum pump conducts vacuumizing, a water heater is started to heat cold water, the flow is controlled, and hot water is injected into the preheating box to be accumulated; then inert gas is filled into the gas filling pipe from the outside, the gas filling pipe is preheated through hot water in the preheating box, then the gas filling pipe preheats the inert gas in the gas filling pipe, and after gas exhaust is finished, the preheated inert gas can be directly filled into the vacuum drying box body; and the drying and heating efficiency of the vacuum drying box body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum drying ovens, in particular to a vacuum drying oven with a function of preheating inert gas. Background Art

[0002] The vacuum drying oven is specially designed for drying heat-sensitive, easily decomposable and easily oxidizable materials. It can maintain a certain vacuum degree in the working chamber during operation and can fill the interior with inert gas. In particular, some items with complex ingredients can also be dried quickly. An intelligent digital temperature regulator is used for temperature setting, display and control. The heating method of the vacuum drying oven mainly adopts electricity, hot water circulation, heat transfer oil, steam microwave or infrared heating.

[0003] When heating the vacuum drying oven, the specified operation sequence must be followed. After placing the materials, lock the door, use a vacuum pump to evacuate the air, and then flush in inert gas. After the inflation is completed, heat it. After the constant temperature heating is completed, deflate the air, and then take out the materials.

[0004] However, when the existing vacuum drying box is used to dry some powders or particles, the vacuum pump used in the vacuum drying box is very likely to extract the material during vacuuming, thereby causing the loss of the material. At the same time, when the vacuum pump is extracting the material, the material is very likely to cause clogging of the vacuum pump, thereby affecting the completion of vacuuming. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a vacuum drying oven with a function of preheating inert gas, which solves the problems raised in the above background technology.

[0006] The present invention provides the following technical solution: a vacuum drying oven with a function of preheating inert gas, comprising a vacuum drying oven body and a controller, wherein a door is hingedly connected to the front of the vacuum drying oven body, an insulation layer is provided inside the inner wall of the vacuum drying oven body, a vacuum pump is fixed to one side of the outside of the vacuum drying oven body, the vacuum pump is controlled by the controller, an exhaust pipe is fixed to the surface of the vacuum pump, and the exhaust pipe is located inside the vacuum drying oven body, a heating plate is fixed to the outside of the inner wall of the vacuum drying oven body, a heating component is provided outside the door away from the vacuum pump, and the heating component is used to heat the inside of the vacuum drying oven body;

[0007] The heating assembly includes a three-layer cabinet, which is fixed to the main body of the vacuum drying box. A water heater is fixed inside the upper layer of the three-layer cabinet, a preheating box is fixed inside the middle layer of the three-layer cabinet, and the water outlet pipe of the water heater is connected to the preheating box. An air charging pipe is fixed inside the preheating box, and one end of the air charging pipe is against the inner wall of the main body of the vacuum drying box. A hot water outflow pipe is fixed to the bottom of the preheating box, a circulating water pipe is fixed to one end of the hot water outflow pipe, and the circulating water pipe is located inside the heating plate, a warm water outflow pipe is fixed to the other end of the circulating water pipe, a circulating pump is fixed to the outside of the warm water outflow pipe, and a guide pipe is fixed to the outside of the circulating pump away from the warm water outflow pipe.

[0008] A cold water inlet pipe is fixed to the outside of the water heater, the inlet ends of the cold water inlet pipe and the air charging pipe pass through the three-layer cabinet, the end of the guide pipe away from the circulation pump is connected to the cold water inlet pipe, and the water heater, the preheating tank and the circulation pump are controlled by a controller;

[0009] A reduction motor is fixed on the top of the vacuum drying box body, and the reduction motor is controlled by a controller. The output shaft of the reduction motor passes through the top of the vacuum drying box body. A rotating shaft is fixed outside the output shaft of the reduction motor. A storage component is provided outside the rotating shaft, and the storage component is used to place the material to be dried.

[0010] Optionally, the storage assembly includes a first storage box, the first storage box is fixedly connected to the rotating shaft, the second storage box is slidably connected to the outside of the rotating shaft above the first storage box, the top of the second storage box has a limiting ring, the third storage box is slidably connected to the outside of the rotating shaft above the second storage box, the bottom of the third storage box is fixed with a bottom ring, the bottom of the bottom ring is fixed with a limiting frame, and the fourth storage box is fixed to the outside of the rotating shaft above the third storage box.

[0011] Optionally, a first sliding rod is fixed to the outside of the heating plate, a support frame is fixed to the surface of the first sliding rod, a double-headed cylinder is fixed to the inside of the support frame close to the second storage box, and limiting plates are fixed to the ends of the two output shafts of the double-headed cylinder, and the two limiting plates are respectively located inside the limiting ring and the limiting frame.

[0012] Optionally, top rods are fixed at both ends of the bottom of the first storage box, a center plate is fixed at the top of the bottom ring close to the support frame, and a circular hole is opened inside the center plate.

[0013] Optionally, a second sliding rod is fixed to the outside of the heating plate below the first sliding rod, the second sliding rod is slidably connected to the first sliding block on the outside of the vacuum pump side, a first spring is fixed to the outside of the first sliding block on the side close to the vacuum pump, and one end of the first spring is fixed to the inner wall of the vacuum drying box body, and a first limiting rod is fixed to the outside of the first sliding block on the side close to the first storage box.

[0014] Optionally, the second sliding rod is slidably connected to the outside of one side of the three-layer cabinet close to the second sliding rod, a second spring is fixed to the outside of one side of the three-layer cabinet close to the second sliding rod, a second limiting rod is fixed to the outside of one side of the second sliding rod close to the first storage box, one end of the second spring is fixed to the inner wall of the vacuum drying box body, and the length of the first limiting rod is shorter than the length of the second limiting rod.

[0015] Optionally, a connecting rod is fixed to the top of the first sliding block, the connecting rod is slidably connected to the first sliding bar, a knocking rod is fixed to the side of the connecting rod close to the support frame, and the knocking rod is slidably connected to the circular hole of the center plate.

[0016] Optionally, movable rods are slidably connected internally on both sides of the bottom plates of the second storage box and the fourth storage box, a horizontal plate is fixed at the bottom of the movable rod, a stirring rod is fixed at the bottom of the horizontal plate, storage grooves are opened on both sides of the bottom plates of the second storage box and the fourth storage box, and the storage grooves are fitted with the horizontal plate, and the side of the horizontal plate close to the rotating shaft is in contact with the rotating shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The vacuum drying box with the function of preheating inert gas has a preheating box fixed in the middle layer of the three-layer cabinet. When the vacuum pump is evacuating, the water heater is started to heat the cold water, and the flow rate is controlled to inject the hot water into the internal accumulation of the preheating box, and then the inert gas is filled into the interior of the filling pipe from the outside, and the filling pipe is preheated by the hot water in the preheating box, and then the filling pipe preheats the inert gas inside it. After the exhaust is completed, the preheated inert gas can be directly filled into the interior of the vacuum drying box body, thereby improving the drying and heating efficiency of the vacuum drying box body.

[0019] 2. The vacuum drying box with the function of preheating inert gas places powder materials in the first and third storage boxes, and places block materials in the second and fourth storage boxes, and then starts the double-headed cylinder, drives the second storage box to move toward the first storage box through the double-headed cylinder, and moves the third storage box toward the fourth storage box, and then the first storage box and the second storage box are engaged, and the second storage box squeezes and limits the powder materials in the first storage box, and the fourth storage box squeezes and limits the powder materials in the third storage box, thereby improving the air exhaust effect and avoiding the loss of powder materials during vacuuming.

[0020] 3. The vacuum drying box with the function of preheating inert gas, when the vacuum drying box body starts to heat the material, the reduction motor is started, the reduction motor drives the rotating shaft to rotate, the rotating shaft drives the first storage box and the fourth storage box to rotate, when the first storage box is rotating, the movable rod in the second storage box is in a stationary state, that is, the stationary movable rod, the horizontal plate and the stirring rod stir and loosen the powder material in the first storage box, thereby increasing the area of ​​the powder material receiving heat radiation, and when the fourth storage box rotates, the movable rod, the horizontal plate and the stirring rod inside it drive the powder material in the third storage box to stir and loosen, and similarly increase the area of ​​the powder material inside it to receive heat radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of the structure of the present invention;

[0022] Figure 2 It is a side view of the structure of the present invention;

[0023] Figure 3 It is a front view of the structure of the present invention;

[0024] Figure 4 It is a structural cross-sectional view of the heating plate of the present invention;

[0025] Figure 5 It is a structural cross-sectional view of the inflation tube and the preheating box of the present invention;

[0026] Figure 6 It is a structural cross-sectional view of the vacuum drying oven of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the storage assembly of the present invention;

[0028] Figure 8 It is a schematic diagram of the positional relationship between the ejector rod and the first limiting rod of the present invention;

[0029] Fig. 9 It is a schematic diagram of the positional relationship between the second storage box, the double-headed cylinder and the third storage box of the present invention;

[0030] Fig.10 It is a structural cross-sectional view of the storage assembly of the present invention.

[0031] In the figure: 1. vacuum drying box body; 11. box door; 12. insulation layer; 13. vacuum pump; 131. exhaust pipe; 14. heating plate; 2. three-layer cabinet; 21. water heater; 22. cold water inlet pipe; 23. preheating box; 24. charging pipe; 25. hot water outlet pipe; 26. circulating water pipe; 27. warm water outlet pipe; 28. circulating pump; 29. ​​guide pipe; 3. reduction motor; 31. rotating shaft; 4. first storage box; 41. ejector rod; 42. second storage box; 43. limit Position ring; 44, third storage box; 45, bottom ring; 46, limit frame; 47, center plate; 48, fourth storage box; 5, movable rod; 51, horizontal plate; 52, stirring rod; 53, storage slot; 6, first slide bar; 61, support frame; 62, double-headed cylinder; 63, limit plate; 7, second slide bar; 71, first slider; 72, first spring; 73, first limit rod; 74, second slider; 75, second spring; 76, second limit rod; 8, connecting rod; 81, knocking rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] See also Figure 1-10 A vacuum drying oven with a function of preheating inert gas comprises a vacuum drying oven body 1 and a controller, a door 11 is hingedly connected to the front of the vacuum drying oven body 1, a heat-insulating layer 12 is provided inside the inner wall of the vacuum drying oven body 1, a vacuum pump 13 is fixed to one side of the outside of the vacuum drying oven body 1, the vacuum pump 13 is controlled by the controller, an exhaust pipe 131 is fixed to the surface of the vacuum pump 13, and the exhaust pipe 131 is located inside the vacuum drying oven body 1, a heating plate 14 is fixed to the outside of the inner wall of the vacuum drying oven body 1, and a heating component is provided outside the door 11 away from the vacuum pump 13, and the heating component is used to heat the inside of the vacuum drying oven body 1;

[0035] The heating assembly includes a three-layer cabinet 2, which is fixed to the vacuum drying box body 1, a water heater 21 is fixed inside the upper layer of the three-layer cabinet 2, a preheating box 23 is fixed inside the middle layer of the three-layer cabinet 2, and the water outlet pipe of the water heater 21 is connected to the preheating box 23, an air charging pipe 24 is fixed inside the preheating box 23, and one end of the air charging pipe 24 is against the inner wall of the vacuum drying box body 1, a hot water outflow pipe 25 is fixed to the bottom of the preheating box 23, a circulating water pipe 26 is fixed to one end of the hot water outflow pipe 25, and the circulating water pipe 26 is located inside the heating plate 14, a warm water outflow pipe 27 is fixed to the other end of the circulating water pipe 26, a circulating pump 28 is fixed to the outside of the warm water outflow pipe 27, and a guide pipe 29 is fixed to the outside of the circulating pump 28 away from the side of the warm water outflow pipe 27;

[0036] A cold water inlet pipe 22 is fixed to the outside of the water heater 21, and the inlet ends of the cold water inlet pipe 22 and the inflation pipe 24 pass through the three-layer cabinet 2. The end of the guide pipe 29 away from the circulation pump 28 is connected to the cold water inlet pipe 22. The water heater 21, the preheating box 23 and the circulation pump 28 are controlled by a controller. A reduction motor 3 is fixed to the top of the vacuum drying box body 1. The reduction motor 3 is controlled by the controller. The output shaft of the reduction motor 3 passes through the top of the vacuum drying box body 1. A rotating shaft 31 is fixed to the outside of the output shaft of the reduction motor 3. A storage component is provided on the outside of the rotating shaft 31. The storage component is used to place the material to be dried.

[0037] The storage assembly includes a first storage box 4, which is fixedly connected to the rotating shaft 31, and the outside of the rotating shaft 31 is located above the first storage box 4 and is slidably connected to the second storage box 42, and a limiting ring 43 is provided on the top of the second storage box 42, and the outside of the rotating shaft 31 is located above the second storage box 42 and is slidably connected to the third storage box 44, and a bottom ring 45 is fixed to the bottom of the third storage box 44, and a limiting frame 46 is fixed to the bottom of the bottom ring 45, and the outside of the rotating shaft 31 is located above the third storage box 44 and is fixed to the fourth storage box 48, and the outside of the heating plate 14 is fixed to the first slide bar 6, and a support frame 61 is fixed to the surface of the first slide bar 6, and a double-headed cylinder 62 is fixed to the inside of the support frame 61 near the side of the second storage box 42, and the ends of the two output shafts of the double-headed cylinder 62 are fixed with limiting plates 63, and the two limiting plates 63 are respectively located inside the limiting ring 43 and the limiting frame 46;

[0038] During the specific operation, firstly, the powdered material is placed in the first storage box 4 and the third storage box 44, and the block material is placed in the second storage box 42 and the fourth storage box 48, and then the box door 11 is closed, so that the vacuum drying box body 1 and the box door 11 are locked, and then the vacuum pump 13 is started by the controller, and the air inside the vacuum drying box body 1 is evacuated to a vacuum state through the exhaust pipe 131, and then the valve of the inflation pipe 24 is opened by the controller, so that the inert gas is filled into the interior of the vacuum drying box body 1 through the inflation pipe 24;

[0039] After the inert gas filling is completed, the water heater 21 is started by the controller, and the external cold water is introduced into the water heater 21 through the cold water inlet pipe 22 and heated, and then transported into the circulating water pipe 26, and the material can be dried. After the drying is completed, the vacuum drying box body 1 is deflated, and the material can be taken out. This is the process of circulating hot water heating vacuum drying in the prior art, and the present invention will not be repeated in detail.

[0040] Specifically, in the above process, different from the conventional circulating hot water heating vacuum drying process, after placing the powdered material and the block material, the double-headed cylinder 62 is first controlled to start, so that the bidirectional output ends of the limit plate 63 are respectively ejected, and then the second storage box 42 is respectively driven to move toward the first storage box 4, and the bottom ring 45 and the third storage box 44 are driven to move toward the fourth storage box 48. When the second storage box 42 moves toward the first storage box 4, the second storage box 42 is gradually engaged with the interior of the first storage box 4. When the first storage box 4 is gradually engaged with the interior of the first storage box 4, the stirring rod 52 inside the second storage box 42 is subjected to the reaction force of the first storage box 4, driving the cross plate 51 and the movable rod 5 to move toward the direction of the third storage box 44, so that the second storage box 42 can be smoothly engaged with the interior of the first storage box 4.

[0041] When the second storage box 42 is inserted into the first storage box 4, the second storage box 42 squeezes the material in the first storage box 4, so that the gap between the material in the first storage box 4, that is, the powder, is reduced, and the air between the powders is squeezed out;

[0042] Similarly, when the third storage box 44 moves toward the fourth storage box 48, the stirring rod 52 inside the fourth storage box 48 is pushed by the third storage box 44, driving the cross plate 51 and the movable rod 5 to move toward the direction of the reduction motor 3, thereby ensuring that the third storage box 44 is clamped to the outside of the fourth storage box 48. When the third storage box 44 is gradually clamped to the outside of the fourth storage box 48, the powder material inside the third storage box 44 is squeezed by the fourth storage box 48, which also plays a role in exhausting the air in the powder inside the third storage box 44, thereby enabling the air in the powder inside the third storage box 44 and the first storage box 4 to be exhausted in advance, thereby improving the efficiency of subsequent vacuum extraction;

[0043] At the same time, since the first storage box 4 is connected to the second storage box 42 and the third storage box 44 is connected to the fourth storage box 48, the vacuum pump 13 is started by the controller. When the vacuum pump 13 is evacuating, the powder materials in the first storage box 4 and the third storage box 44 are blocked by the second storage box 42 and the fourth storage box 48 respectively, thereby avoiding the loss of materials in the traditional vacuuming process, that is, ensuring the integrity of material drying, and also improving the service life of the vacuum pump 13;

[0044] After the vacuum pump 13 is started by the controller, the interior of the vacuum drying box body 1 is evacuated through the exhaust pipe 131. During the evacuation process, the water heater 21 is started again by control. After the cold water is heated by the water heater 21, the hot water is transported to the interior of the preheating box 23 through the outlet pipe of the water heater 21 and stored. After the hot water enters the interior of the preheating box 23, the inflation pipe 24 can be heated. At this time, the inert gas is filled into the inflation pipe 24, but the vacuum drying box body 1 is not inflated, so that the inert gas pre-fills the inflation pipe 24, so that the inert gas in the inflation pipe 24 is preheated;

[0045] After the vacuum pump 13 completes the vacuuming, the controller controls the gas charging pipe 24 to fill the inert gas inside the vacuum drying box body 1, and as the inert gas from the outside continues to enter, the inert gas that enters later is continuously preheated by the gas charging pipe 24 after flowing through the gas charging pipe 24, so that after the inert gas is filled into the vacuum drying box body 1, the preheated inert gas can first heat up the inside of the vacuum drying box body 1, thereby improving the efficiency of the present invention in drying materials;

[0046] Further, when the inert gas is filled, the valve of the hot water outflow pipe 25 can be controlled by the controller to open, so that the hot water stored in the preheating box 23 enters the inside of the circulating water pipe 26 through the hot water outflow pipe 25. When the hot water enters the inside of the circulating water pipe 26, it can heat the inside of the vacuum drying box body 1 by thermal radiation after flowing through the complete circulating water pipe 26. Then, the heat of the hot water is lost and becomes warm water. The circulating pump 28 is started by the controller, so that the circulating pump 28 pumps the warm water into the inside of the cold water inlet pipe 22, and the warm water replaces the original cold water, and is heated again by the water heater 21, so that the hot water can form a cycle, and then the material in the vacuum drying box body 1 is circulated, heated and dried;

[0047] It should be noted that the surface of the inflation tube 24 located inside the vacuum drying box body 1 is evenly provided with air holes, and a control valve can be set in the air hole, so that the inert gas will not enter the interior of the vacuum drying box body 1 in advance during preheating. At the same time, a control valve can be set inside the hot water outflow pipe 25. Through the control valve, the hot water stored in the preheating box 23 is prevented from entering the interior of the vacuum drying box body 1 in advance, thereby ensuring the safety during vacuuming and inert gas filling. At the same time, when the water heater 21 starts to supply water to the preheating box 23, the flow rate of hot water can be controlled by the controller to prevent the preheating box 23 from being filled too quickly, which in turn affects the preheating time of the inflation tube 24.

[0048] Embodiment 2:

[0049] The two ends of the bottom of the first storage box 4 are fixed with a top rod 41, the top of the bottom ring 45 close to the support frame 61 is fixed with a center plate 47, a circular hole is opened inside the center plate 47, the outside of the heating plate 14 is located below the first slide bar 6 and fixed with a second slide bar 7, the outside of the second slide bar 7 close to the vacuum pump 13 is slidably connected with a first slider 71, the outside of the first slider 71 close to the vacuum pump 13 is fixed with a first spring 72, and one end of the first spring 72 is fixed to the inner wall of the vacuum drying box body 1, and the outside of the first slider 71 close to the first storage box 4 is fixed with a first limiting rod 73;

[0050] The second slide bar 7 is slidably connected to the outside of the third-layer cabinet 2 with a second slider 74, and the second slider 74 is fixed with a second spring 75 on the outside of the third-layer cabinet 2. The second slider 74 is fixed with a second limit rod 76 on the outside of the first storage box 4. One end of the second spring 75 is fixed to the inner wall of the vacuum drying box body 1. The length of the first limit rod 73 is shorter than the length of the second limit rod 76. A connecting rod 8 is fixed to the top of the first slider 71. The connecting rod 8 is slidably connected to the first slide bar 6. A knocking rod 81 is fixed to the side of the connecting rod 8 close to the support frame 61, and the knocking rod 81 is slidably connected to the circular hole of the center plate 47.

[0051] During the specific operation, when the hot water enters the inside of the circulating water pipe 26, the vacuum drying box body 1 starts to dry the materials in the first storage box 4, the second storage box 42, the third storage box 44 and the fourth storage box 48. During this process, the reduction motor 3 is started by the controller, and then the reduction motor 3 drives the rotating shaft 31 to rotate, and then the rotating shaft 31 drives the first storage box 4 and the fourth storage box 48 to rotate. The rotating first storage box 4 and the fourth storage box 48 drive the powder materials inside them to gradually approach the circulating water pipe 26. Since the circulating hot water heating and drying adopts the method of heat radiation and heat conduction for drying and heating, that is, the closer to the circulating water pipe 26, the more stable and uniform the heat radiation is, and the drying of the material is more stable and uniform;

[0052] The first stopper 73 is used to push the first stopper 73 so that the first stopper 73 drives the first slider 71 to move on the surface of the second slider 7 toward the second slider 74. The first slider 71 rubs against the second slider 7 during the movement, thereby achieving the effect of frictional heating, thereby making the temperature inside the vacuum drying box body 1 more stable and slowing down the heat loss. At the same time, the first stopper 73 gradually approaches the second slider 74 during the process of moving and rubbing the second slider 7, and pushes the second slider 74 to move along the second slider 7 toward the three-layer cabinet body 2 through the first stopper 73. Then, the second slider 74 generates heat by friction on the surface of the second slider 7, thereby further slowing down the heat loss inside the vacuum drying box body 1.

[0053] The locking cam 76 is in the state of being moved, and the locking cam 76 is in the state of being moved, so that the locking cam 76 can move freely, and the locking cam 76 can move freely, so that the first locking cam 76 and the second locking cam 76 can move freely.

[0054] Furthermore, when the first limiting rod 73 is disengaged, the second slider 74 loses the thrust of the first limiting rod 73 and resets to the initial position under the action of the second spring 75, that is, moves in the direction of the vacuum pump 13, while the top rod 41 moves in the direction of the three-layer cabinet 2 during the rotation, that is, the movement directions of the two are opposite at this time. When the second slider 74 is reset, it touches the top rod 41, and then vibrates, and the first storage box 4 vibrates synchronously. During the vibration process, the first storage box 4 plays the role of shaking off the filter holes of the first storage box 4, thereby ensuring the smoothness of the filter holes in the first storage box 4 and avoiding the filter holes of the first storage box 4 from being blocked, thereby affecting the efficiency of the powder material in the first storage box 4 being heated by thermal radiation; thereby improving the efficiency of the powder in the first storage box 4 being heated and dried;

[0055] Furthermore, when the first limiting rod 73 drives the first sliding block 71 to repeatedly rub the second sliding block 7, the first sliding block 71 drives the connecting rod 8 to move synchronously outside the first sliding block 6, so that the connecting rod 8 rubs the first sliding block 6, which can also generate a certain amount of heat, thereby improving the temperature stability in the vacuum drying box body 1. At the same time, since the connecting rod 8 is affected by the first sliding block 71 and moves, the connecting rod 8 drives the knocking rod 81 to move along the direction of the first sliding block 6, and the knocking rod 81 gradually approaches the center plate 47 during the movement until the knocking rod 81 is completely inserted into the circular hole of the center plate 47.

[0056] When the knocking rod 81 is inserted into the circular hole of the center plate 47, piston friction is generated with the center plate 47, and friction heating operation is performed again, further improving the temperature stability in the vacuum drying box body 1;

[0057] At the same time, when the knocking rod 81 is fully inserted into the center plate 47, the connecting rod 8 contacts the center plate 47, causing the center plate 47 to vibrate, and the third storage box 44 is driven to vibrate synchronously through the center plate 47, so that during the vibration process, the third storage box 44 shakes off the powder blocked in the filter holes due to vacuum extraction, thereby improving the smoothness of the filter holes in the third storage box 44, thereby avoiding the heat radiation of the powder material in the third storage box 44 from being blocked, and further improving the efficiency of drying the powder material in the third storage box 44.

[0058] It should be noted that the initial positions of the first slider 71 and the second slider 74 are both outside the second slider 7, close to the side of the vacuum pump 13, and the rotation direction of the rotating shaft 31 is from the vacuum pump 13 to the three-layer cabinet 2. Therefore, it can be ensured that during the process of the rotating shaft 31 driving the first storage box 4 to rotate, the first storage box 4 drives the top rod 41 to contact the first limiting rod 73 first, and then contact the second limiting rod 76. In addition, during the continuous resetting process of the first spring 72 and the second spring 75, the elastic potential energy and kinetic energy will also be converted into thermal energy. At the same time, since the first spring 72 and the second spring 75 continue to deform, the process of converting thermal energy is also continuous, so that the first spring 72 and the second spring 75 can also generate heat, thereby once again improving the stability of the internal temperature of the vacuum drying box body 1 and the drying efficiency.

[0059] Embodiment three:

[0060] The second storage box 42 and the fourth storage box 48 have movable rods 5 slidably connected to the inside of the bottom plates on both sides thereof, a horizontal plate 51 is fixed to the bottom of the movable rod 5, a stirring rod 52 is fixed to the bottom of the horizontal plate 51, storage grooves 53 are provided on both sides of the bottom plates of the second storage box 42 and the fourth storage box 48, and the storage grooves 53 fit with the horizontal plate 51, and the side of the horizontal plate 51 close to the rotating shaft 31 contacts the rotating shaft 31;

[0061] Specifically, since the second storage box 42 and the third storage box 44 are in a stationary state, when the second storage box 42 and the third storage box 44 are reset, the stirring rod 52 loses pressure, and the movable rods 5 in the second storage box 42 and the fourth storage box 48 are reset, that is, the movable rod 5 in the second storage box 42 drives the stirring rod 52 to stay on the surface of the material in the first storage box 4, and the movable rod 5 in the fourth storage box 48 drives the stirring rod 52 to stay on the surface of the material in the third storage box 44;

[0062] As the first storage box 4 rotates, the stationary horizontal plate 51 and the stirring rod 52 in the second storage box 42 can stir the powder material in the first storage box 4, so that the position of the powder in the first storage box 4 changes from the original tight state after being squeezed to a loose state, that is, the gap between the powders increases, and at the same time, due to the extraction of air, the powder material in the first storage box 4 can be more fully exposed to the heat source, thereby improving the drying efficiency of the powder inside the first storage box 4;

[0063] At the same time, the fourth storage box 48 is in a rotating state, that is, the movable rod 5, the horizontal plate 51 and the stirring rod 52 in the fourth storage box 48 are all in a rotating state, and the third storage box 44 is in a stationary state, that is, the fourth storage box 48 is rotating, driving the movable rod 5, and linking the horizontal plate 51 and the stirring rod 52 to stir the powder material inside the third storage box 44, and then restore the compact powder material in the third storage box 44 to a loose state again, thereby increasing the contact area between the powder material in the third storage box 44 and the heat source, thereby improving the drying efficiency of the powder material in the third storage box 44.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum drying oven with a function of preheating inert gas, comprising a vacuum drying oven body (1) and a controller, wherein a door (11) is hingedly connected to the front of the vacuum drying oven body (1), an insulation layer (12) is provided inside the inner wall of the vacuum drying oven body (1), a vacuum pump (13) is fixed to one side of the outside of the vacuum drying oven body (1), the vacuum pump (13) is controlled by the controller, an exhaust pipe (131) is fixed to the surface of the vacuum pump (13), and the exhaust pipe (131) is located inside the vacuum drying oven body (1), and a heating plate (14) is fixed to the outside of the inner wall of the vacuum drying oven body (1), characterized in that: A heating component is provided on the outside of the box door (11) on a side away from the vacuum pump (13), and the heating component is used to heat the inside of the vacuum drying box body (1); The heating assembly comprises a three-layer cabinet (2), the three-layer cabinet (2) being fixed to a vacuum drying oven body (1), a water heater (21) being fixed inside an upper layer of the three-layer cabinet (2), a preheating box (23) being fixed inside a middle layer of the three-layer cabinet (2), and a water outlet pipe of the water heater (21) being connected to the preheating box (23), and an air charging pipe (24) being fixed inside the preheating box (23), and one end of the air charging pipe (24) being abutted against an inner wall of the vacuum drying oven body (1). A hot water outlet pipe (25) is fixed to the bottom of the preheating box (23), a circulating water pipe (26) is fixed to one end of the hot water outlet pipe (25), and the circulating water pipe (26) is located inside the heating plate (14), a warm water outlet pipe (27) is fixed to the other end of the circulating water pipe (26), a circulating pump (28) is fixed to the outside of the warm water outlet pipe (27), and a guide pipe (29) is fixed to the outside of the circulating pump (28) away from the warm water outlet pipe (27); A cold water inlet pipe (22) is fixed to the outside of the water heater (21); the inlet ends of the cold water inlet pipe (22) and the air charging pipe (24) pass through the three-layer cabinet (2); one end of the flow guide pipe (29) away from the circulation pump (28) is in communication with the cold water inlet pipe (22); the water heater (21), the preheating tank (23) and the circulation pump (28) are controlled by a controller; A reduction motor (3) is fixed on the top of the vacuum drying box body (1); the reduction motor (3) is controlled by a controller; an output shaft of the reduction motor (3) passes through the top of the vacuum drying box body (1); a rotating shaft (31) is fixed outside the output shaft of the reduction motor (3); a storage component is provided outside the rotating shaft (31); the storage component is used to place materials to be dried.

2. The vacuum drying oven with the function of preheating inert gas according to claim 1, characterized in that: The storage assembly comprises a first storage box (4), the first storage box (4) being fixedly connected to a rotating shaft (31), a second storage box (42) being slidably connected to the outside of the rotating shaft (31) located above the first storage box (4), a limiting ring (43) being provided at the top of the second storage box (42), a third storage box (44) being slidably connected to the outside of the rotating shaft (31) located above the second storage box (42), a bottom ring (45) being fixed at the bottom of the third storage box (44), a limiting frame (46) being fixed at the bottom of the bottom ring (45), and a fourth storage box (48) being fixed to the outside of the rotating shaft (31) located above the third storage box (44).

3. The vacuum drying oven with the function of preheating inert gas according to claim 2, characterized in that: A first slide bar (6) is fixed to the outside of the heating plate (14); a support frame (61) is fixed to the surface of the first slide bar (6); a double-headed cylinder (62) is fixed to the inside of the support frame (61) on a side close to the second storage box (42); limiting plates (63) are fixed to the ends of two output shafts of the double-headed cylinder (62), and the two limiting plates (63) are respectively located inside the limiting ring (43) and the limiting frame (46).

4. The vacuum drying oven with the function of preheating inert gas according to claim 3, characterized in that: Top rods (41) are fixed at both ends of the bottom of the first storage box (4), and a center plate (47) is fixed at the top of the bottom ring (45) on the side close to the support frame (61), and a circular hole is opened inside the center plate (47).

5. The vacuum drying oven with the function of preheating inert gas according to claim 4, characterized in that: A second slide bar (7) is fixed to the outside of the heating plate (14) below the first slide bar (6); a first slider (71) is slidably connected to the outside of the second slide bar (7) on a side close to the vacuum pump (13); a first spring (72) is fixed to the outside of the first slider (71) on a side close to the vacuum pump (13); one end of the first spring (72) is fixed to the inner wall of the vacuum drying box body (1); and a first limiting rod (73) is fixed to the outside of the first slider (71) on a side close to the first storage box (4).

6. The vacuum drying oven with the function of preheating inert gas according to claim 5, characterized in that: The second sliding rod (7) is slidably connected to the outside of the side close to the three-layer cabinet (2) with a second slider (74); the second slider (74) is fixed to the outside of the side close to the three-layer cabinet (2) with a second spring (75); the second slider (74) is fixed to the outside of the side close to the first storage box (4) with a second limiting rod (76); one end of the second spring (75) is fixed to the inner wall of the vacuum drying box body (1); the length of the first limiting rod (73) is shorter than the length of the second limiting rod (76).

7. The vacuum drying oven with the function of preheating inert gas according to claim 6, characterized in that: A connecting rod (8) is fixed to the top of the first sliding block (71), the connecting rod (8) is slidably connected to the first sliding block (6), a knocking rod (81) is fixed to a side of the connecting rod (8) close to the support frame (61), and the knocking rod (81) is slidably connected to the circular hole of the center plate (47).

8. The vacuum drying oven with the function of preheating inert gas according to claim 7, characterized in that: Movable rods (5) are slidably connected to the interior of the bottom plates of the second storage box (42) and the fourth storage box (48); a horizontal plate (51) is fixed to the bottom of the movable rod (5); a stirring rod (52) is fixed to the bottom of the horizontal plate (51); storage grooves (53) are provided on both sides of the bottom plates of the second storage box (42) and the fourth storage box (48); the storage grooves (53) are matched with the horizontal plate (51); and a side of the horizontal plate (51) close to the rotating shaft (31) is in contact with the rotating shaft (31).

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