Electrothermal blowing drying box

Abstract

The invention relates to the technical field of drying boxes, and provides an electrothermal blowing drying box which comprises a box body and further comprises a plurality of drying trays, a hot air mechanism, a protective cover and a stirring mechanism, the drying trays are located in the box body and used for containing objects to be dried, and the hot air mechanism is used for conveying hot air into the box body; the hot air mechanism comprises a heating bin, a hot air channel, air blowing blades and an exhaust pipe, a temperature controller is installed in the heating bin, an air inlet is formed in the box body and communicates with the heating bin, the hot air channel is formed in the side wall of the box body, the air blowing blades are rotatably arranged in the heating bin, and the exhaust pipe communicates with the top of the box body; the protective cover is fixedly connected to the box body, a plurality of filtering holes are formed in the protective cover, and the stirring mechanism is used for stirring the to-be-dried objects in the drying tray. According to the technical scheme, the problem that in the prior art, dust adheres to the surface of a dried object, and the quality of the dried object is affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of drying ovens, and in particular to an electric heating blast drying oven. Background Art

[0002] Electric heating blast drying oven is also known as "drying oven". As the name implies, it uses electric heating to conduct blast cycle drying test. It is divided into blast drying and vacuum drying. Blast drying is to blow out hot air through a circulating fan to ensure the temperature balance in the box. Vacuum drying is to use a vacuum pump to extract the air in the box to make the atmospheric pressure in the box lower than normal pressure, so that the product can be tested in a very clean state. It is a commonly used instrument and equipment, mainly used to dry samples, and can also provide the temperature environment required for the experiment. Drying ovens are used in various industries such as chemical, pharmaceutical, casting, automobile, food, machinery, etc.

[0003] At present, when the electric blast drying oven is heating and drying, a high-temperature resistant blower motor is installed on the top of the oven. The hot air is generally blown out from the left and right sides of the oven body, and the air is returned from the top. An exhaust port is arranged on the top of the oven to discharge the smoke and waste gas generated by baking in time. The oven is provided with an air inlet and an exhaust port. Under the action of the airflow, external dust is easy to enter. At the same time, when the door of the oven is opened to place the dried objects, some dust will also enter. The dust impurities adhere to the wet surface of the dried objects, causing pollution to the dried objects and affecting the subsequent use. Therefore, we propose an electric blast drying oven, which can promote the separation of dust and dried objects and reduce the influence of dust on the quality of the dried objects. Summary of the invention

[0004] The present invention provides an electric heating blast drying oven, which solves the problem in the related art that dust adheres to the surface of the dried object and affects the quality of the dried object.

[0005] The technical solution of the present invention is as follows: An electric heating blast drying oven, comprising a box body, and also comprising: A drying tray, wherein a plurality of drying trays are provided, and the drying trays are located inside the box body and are used to hold items to be dried; A hot air mechanism, which is used to deliver hot air to the interior of the box, and includes: A heating chamber, the heating chamber is arranged inside the box body, a temperature controller is installed inside the heating chamber, an air inlet is opened on the box body, and the air inlet is connected to the heating chamber; A hot air channel, wherein the hot air channel is arranged on the side wall of the box body, and a plurality of air outlets are opened on the inner wall of the box body, and the air outlets are connected with the heating chamber through the hot air channel; A blast blade, wherein the blast blade is rotatably disposed inside the heating chamber; An exhaust pipe, wherein a plurality of exhaust pipes are provided and the exhaust pipes are connected to the top of the box body; A protective cover, the protective cover is fixedly connected to the box body, a plurality of filter holes are opened on the protective cover, and the air inlet is located inside the protective cover; A stirring mechanism, the stirring mechanism is used to stir the items to be dried in the drying tray, and the stirring mechanism includes: A movable plate, which is liftable and movably arranged inside the box; A stirring shaft connected to the bottom of the moving plate; A stirring rod is fixedly connected to the outside of the stirring shaft.

[0006] In order to improve the space utilization of the box body, multiple drying trays are provided, two large box doors are hinged on the box body, multiple access ports are opened on the large box doors, small box doors are hinged at the access ports, and the drying trays correspond to the small box doors one by one.

[0007] In order to support the drying tray, a plurality of support plates are fixedly connected to the interior of the box body, ventilation holes are provided on the support plates, and the drying tray is located on the top of the support plates.

[0008] In order to limit the position of the drying tray, a plurality of support seats are fixedly connected to the top of the support plate, and the drying tray and the support seats are in sliding cooperation.

[0009] In order to ensure the ventilation effect of the support plate, a support block is fixedly connected to the support seat, the bottom end of the drying tray is in contact with the support block, and there is a gap between the drying tray and the top end of the support plate.

[0010] In order to improve the drying effect of the items to be dried, an auxiliary drying mechanism is also included, and the auxiliary drying mechanism includes: A hot air pipe network, the hot air pipe network is located inside the heating chamber, the hot air pipe network is connected to an air inlet pipe, and the hot air pipe network is connected to the movable plate through a telescopic pipe; The moving plate, the stirring shaft and the stirring rod are all hollow structures, the stirring shaft is connected to the moving plate, and the stirring rod is connected to the stirring shaft.

[0011] In order to further improve the drying effect of the articles to be dried, the stirring shaft is rotatably arranged at the bottom of the movable plate, and the stirring shaft is rotatably connected to the movable plate.

[0012] In order to reduce the dust adhering to the surface of the protective cover, a cleaning component is also included, and the cleaning component is used to clean the protective cover. The cleaning component includes: A rotating frame, the rotating frame being rotatably disposed on the protective cover; A brush is fixedly connected to the rotating frame, and the brush is in contact with the protective cover.

[0013] In order to reduce the entry of external dust into the interior of the box, the exhaust pipe is in a round shape, and the air outlet of the exhaust pipe faces the box.

[0014] In order to realize the lifting and movement of the movable plate, a driving mechanism is also included, and the driving mechanism is used to drive the movable plate to lift and move, and the driving mechanism includes: A screw feed mechanism, the screw feed mechanism being installed inside the box; An electric cylinder is installed on the nut seat of the screw feed mechanism, two movable plates located on the same layer are fixedly connected by a connecting seat, multiple connecting seats are fixedly connected by a connecting pipe, one of the multiple connecting seats is fixedly connected to the output end of the electric cylinder, and a through opening for the connecting pipe to move is opened on the support plate.

[0015] The working principle and beneficial effects of the present invention are: 1. In the present invention, the temperature in the heating chamber is regulated by a thermostat, and the outside air enters the heating chamber for heating under the action of the blast blades, and enters the interior of the box through the hot air channel and the air outlet. The hot air passes through multiple support plates and is discharged from the exhaust pipe, so that the interior of the box is in a constant high temperature range, and the items to be dried in the drying tray are dried.

[0016] 2. In the present invention, the protective cover is used to block and filter external dust, thereby reducing the entry of external dust. The rotating frame drives the brush to rotate to clean the surface of the protective cover, thereby reducing the clogging of the filter holes of the protective cover by dust and ensuring the ventilation effect. At the same time, the movement and rotation of the stirring shaft and the stirring rod are used to stir the objects to be dried in the drying tray, thereby increasing the contact area between the hot air and the objects to be dried and improving the drying effect of the objects to be dried. After the air in the hot air pipe network is heated inside the heating bin, the hot air is blown out through the stirring rod to pneumatically stir the objects to be dried. At the same time, the hot air lifts and dries the dust on the surface of the objects to be dried, thereby reducing the adhesion between the dust and the objects to be dried, and allowing the dust to be discharged through the exhaust pipe under the action of the airflow, thereby reducing the dust residue on the surface of the objects to be dried.

[0017] 3. Therefore, compared with the electric blast drying box in the prior art, the present invention filters the external dust by setting a protective cover, and at the same time drives the stirring shaft and the stirring rod through the movable plate to stir the objects to be dried in the drying tray, and the heating chamber heats the air in the hot air pipe network, so that the hot air is blown to the objects to be dried through the rotating stirring rod, thereby further improving the stirring effect of the objects to be dried, and at the same time, the dust on the surface of the objects to be dried is lifted and discharged through the exhaust pipe under the action of the airflow, thereby reducing the influence of dust on the quality of the dried objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the structure of a partial cross-section of the present invention; Figure 2 It is a schematic structural diagram of the first viewing angle of the entire present invention; Figure 3 It is a structural schematic diagram of the second viewing angle of the whole invention; Figure 4 It is a schematic diagram of the structure of the hot air mechanism, protective cover and cleaning component of the present invention; Figure 5 It is a structural schematic diagram of the drying tray, the supporting plate, the stirring mechanism and the auxiliary drying mechanism of the present invention; Figure 6 It is a structural schematic diagram of the stirring mechanism and the auxiliary drying mechanism of the present invention; Figure 7 For the present invention Figure 5 A schematic diagram of the local enlarged structure at point A in the middle; Figure 8 For the present invention Figure 6 Schematic diagram of the local enlarged structure at point B in the middle.

[0020] In the figure: 1. Box body; 2. Drying tray; 3. Protective cover; 4. Large box door; 5. Small box door; 6. Pallet; 7. Support seat; 8. Support block; 101. Heating chamber; 102. Hot air channel; 103. Blower blades; 104. Exhaust pipe; 105. Temperature controller; 106. Double-head motor; 201, rotating frame; 202, brush; 301, moving plate; 302, stirring shaft; 303, stirring rod; 401, screw feed mechanism; 402, electric cylinder; 403, connecting seat; 404, connecting pipe; 501, hot air pipe network; 502, air intake pipe; 503, driving motor; 504, driven gear; 505, transmission gear. DETAILED DESCRIPTION

[0021] The following will be combined with 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.

[0022] like Figures 1 to 8 As shown, this embodiment proposes an electric blast drying oven, including a box body 1, and also includes a drying tray 2, a hot air mechanism, a protective cover 3 and a stirring mechanism. Compared with the electric blast drying oven in the prior art, the present invention filters external dust by setting a protective cover 3, and at the same time drives the stirring shaft 302 and the stirring rod 303 to stir the objects to be dried in the drying tray 2 through the movable plate 301, and the heating chamber 101 heats the air in the hot air pipe network 501, so that the hot air is blown to the objects to be dried through the rotating stirring rod 303, further improving the stirring effect of the objects to be dried, and at the same time, the dust on the surface of the objects to be dried is lifted and discharged through the exhaust pipe 104 under the action of the airflow, thereby reducing the influence of dust on the quality of the dried objects.

[0023] There are multiple drying trays 2, which are located inside the box body 1 and are used to hold items to be dried. In order to improve the space utilization of the box body 1, there are multiple drying trays 2. Two large box doors 4 are hinged on the box body 1, and multiple take-in and put-out openings are provided on the large box doors 4. Small box doors 5 are hinged at the take-in and put-out openings, and the drying trays 2 and the small box doors 5 correspond to each other one by one. Multiple support plates 6 are fixedly connected to the inside of the box body 1, and ventilation holes are provided on the support plates 6. The drying tray 2 is located on the top of the support plates 6, and multiple support seats 7 are fixedly connected to the top of the support plates 6. The drying tray 2 and the support seats 7 are slidably matched, and a support block 8 is fixedly connected to the support seat 7. The bottom end of the drying tray 2 is in contact with the support block 8, and the drying tray 2 and There is a gap between the tops of the support plates 6. By opening the small box door 5, the drying tray 2 at the corresponding position can be placed into or taken out of the box body 1, so as to realize the taking and placing of the items to be dried. By opening the large box door 4, the drying trays 2 can be taken and placed in batches, or the interior of the box body 1 can be cleaned or repaired. The support seats 7 are arranged in groups of four. The drying tray 2 is located between the four support seats 7. The four support seats 7 are located at the four corners of the drying tray 2. The drying tray 2 is limited and supported by the support blocks 8. There is a gap between the drying tray 2 and the support plate 6, which reduces the obstruction of the drying tray 2 to the passage of hot air, improves the fluidity of hot air, and facilitates the drying of the items to be dried in the drying tray 2.

[0024] The hot air mechanism is used to convey hot air to the interior of the box body 1. The hot air mechanism includes a heating chamber 101, a hot air channel 102, a blast blade 103 and an exhaust pipe 104. The heating chamber 101 is arranged inside the box body 1, and a temperature controller 105 is installed inside the heating chamber 101. An air inlet is opened on the box body 1, and the air inlet is connected to the heating chamber 101. The hot air channel 102 is arranged on the side wall of the box body 1. A plurality of air outlets are opened on the inner wall of the box body 1, and the air outlets are connected to the heating chamber 101 through the hot air channel 102. The blast blade 103 is rotatably arranged inside the heating chamber 101, and a double-headed motor 106 is installed on the box body 1. The blast blade 103 is fixedly connected to one output end of the double-headed motor 106. A plurality of exhaust pipes 104 are provided, and the exhaust pipe 104 is connected to the top of the box body 1. In order to reduce the external dust from entering the interior of the box body 1, the exhaust pipe 104 is in a round shape. The air outlet of 4 faces the box body 1, and the temperature in the heating chamber 101 is regulated by the thermostat 105. The heating temperature is set according to the drying requirements of the items to be dried, and the double-headed motor 106 drives the blower blades 103 to rotate to form an inward airflow. The outside air enters the interior of the heating chamber 101 through the air inlet, and the air is heated to a specific temperature through the thermostat 105. Then, the hot air enters the interior of the box body 1 through the hot air channel 102 and the air outlet. The air outlet is located at the lower position of the box body 1. After entering the box body 1, the hot air flows from bottom to top and is then discharged through the exhaust pipe 104. The air outlet of the exhaust pipe 104 faces downward to reduce the entry of external dust. At the same time, the hot air is blown out through the exhaust pipe 104, which also plays a role in reducing dust. A filter is also installed at the air outlet to further filter the dust and reduce the pollution caused by external dust entering the interior of the box body 1 to the items to be dried.

[0025] The protective cover 3 is fixedly connected to the casing 1, and a plurality of filter holes are provided on the protective cover 3. The air inlet is located inside the protective cover 3. In order to reduce the dust adhering to the surface of the protective cover 3, a cleaning component is also included. The cleaning component is used to clean the protective cover 3. The cleaning component includes a rotating frame 201 and a brush 202. The rotating frame 201 is rotatably arranged on the protective cover 3, and the rotating frame 201 is fixedly connected to the other output end of the double-headed motor 106, and the brush 202 is fixedly connected to the rotating frame 201. The brush 202 contacts the protective cover 3, and the outside air is allowed to enter under the action of the blast blade 103. The air inlet is protected by the protective cover 3 to block the outside dust. At the same time, the double-headed motor 106 drives the rotating frame 201 and the brush 202 to rotate around the protective cover 3 to clean the surface of the protective cover 3, so as to avoid the accumulation of dust on the surface of the protective cover 3 and the blockage of the filter holes, thereby ensuring the normal entry of air.

[0026] The stirring mechanism is used to stir the items to be dried in the drying tray 2. The stirring mechanism includes a moving plate 301, a stirring shaft 302 and a stirring rod 303. The moving plate 301 can be lifted and moved and is arranged inside the box body 1. The stirring shaft 302 is connected to the bottom of the moving plate 301. The stirring rod 303 is fixedly connected to the outside of the stirring shaft 302. In order to realize the lifting and movement of the moving plate 301, it also includes a driving mechanism. The driving mechanism is used to drive the moving plate 301 to lift and move. The driving mechanism includes a screw feeding mechanism 401 and an electric cylinder 402. The screw feeding mechanism 401 is installed inside the box body 1, and the electric cylinder 402 is installed on the nut seat of the screw feeding mechanism 401. Two moving plates 301 located on the same layer are fixedly connected by a connecting seat 403. Multiple connecting seats 403 are fixedly connected by a connecting pipe 404. One of the multiple connecting seats 403 is connected to the connecting pipe 404. 03 is fixedly connected to the output end of the electric cylinder 402, and a through hole for the connecting pipe 404 to move is opened on the support plate 6. The nut seat and the electric cylinder 402 are driven to move through the screw feeding mechanism 401, thereby driving the connecting seat 403 and the movable plate 301 to move back and forth, and the stirring shaft 302 and the stirring rod 303 stir the objects to be dried inside the drying tray 2, thereby increasing the contact area between the objects to be dried and the hot air, and improving the drying effect of the objects to be dried. The electric cylinder 402 drives multiple movable plates 301 to rise and fall synchronously, and the movable plate 301 drives the stirring shaft 302 and the stirring rod 303 to rise away from the drying tray 2 to avoid obstruction to the taking and placing of the drying tray 2. When the drying tray 2 is placed in the interior of the box body 1, the stirring shaft 302 and the stirring rod 303 enter the interior of the objects to be dried, and the movable plate 301 drives the stirring shaft 302 and the stirring rod 303 to move to stir the objects to be dried.

[0027] In order to improve the drying effect of the items to be dried, an auxiliary drying mechanism is also included, which includes a hot air pipe network 501, which is located inside the heating chamber 101, and the hot air pipe network 501 is connected to an air inlet pipe 502. The hot air pipe network 501 is connected to the movable plate 301 through a telescopic pipe, and the movable plate 301, the stirring shaft 302 and the stirring rod 303 are all hollow structures. The stirring shaft 302 is connected to the movable plate 301, and the stirring rod 303 is connected to the stirring shaft 302. The stirring shaft 302 is rotatably arranged at the bottom of the moving plate 301, and the stirring shaft 302 and the moving plate 301 are connected in rotation. A driving motor 503 is installed on the moving plate 301. The stirring shaft 302 is located inside the moving plate 301 and is fixedly sleeved with a driven gear 504. The inside of the moving plate 301 is rotatably connected with a plurality of transmission gears 505. The transmission gear 505 is located between two adjacent driven gears 504 and meshes with the driven gears 504. The plurality of transmission gears 503 are provided on the moving plate 301. A transmission gear 505 in 5 is fixedly connected to the output end of the driving gear to connect the air inlet pipe 502 with the external air supply device. The external air supply device can be a blower. The blower is located inside the protective cover 3. The air outlet of the blower is connected to the air inlet pipe 502. The air intake of the blower can be filtered through the protective cover 3 to prevent dust from entering. The air is transported to the inside of the hot air pipe network 501 through the air inlet pipe 502. The thermostat 105 in the heating chamber 101 heats the hot air pipe network 501. The hot air in the hot air pipe network 501 enters the stirring shaft 302 and the stirring rod 303 through the telescopic tube, the connecting seat 403, the connecting pipe 404 and the moving seat, and is blown out through the stirring rod 303. The stirring rod 303 is located inside the items to be dried to dry the items to be dried. At the same time, the driving motor 503 drives the transmission gear 505 and the driven gear 504 to rotate, so that the stirring shaft 302 drives the stirring rod 303 to rotate, thereby improving the stirring effect of the items to be dried.

[0028] The working principle or use process of the electric heating blast drying oven is as follows: First, open the small box door 5, take out the drying tray 2, put the items to be dried into the drying tray 2, place the drying tray 2 between the corresponding support seats 7, and close the small box door 5 and the large box door 4; The thermostat 105 is turned on to set the drying temperature. The thermostat 105 controls the temperature in the heating chamber 101. The double-headed motor 106 drives the blast blades 103 to rotate, and air is sucked into the heating chamber 101. The external air enters the heating chamber 101 through the protective cover 3 and the air inlet. The thermostat 105 heats the air. The blast blades 103 blow the hot air into the interior of the box body 1 through the hot air channel 102 and the air outlet. The hot air is discharged from bottom to top through the exhaust pipe 104. In this process, the items to be dried in the drying tray 2 are dried; During the process of taking and placing the drying tray 2, the movable plate 301 and the stirring shaft 302 are in a higher position. After the drying tray 2 is placed into the box body 1, the electric cylinder 402 drives the movable plate 301 to descend, and the stirring rod 303 penetrates into the interior of the items to be dried. The screw feeding mechanism 401 drives the movable plate 301 and the stirring rod 303 to move, and the driving motor 503 drives the stirring shaft 302 and the stirring rod 303 to rotate. The external air supply equipment supplies air to the interior of the hot air pipe network 501, and the thermostat 105 heats the air in the hot air pipe network 501. The hot air enters the interior of the stirring shaft 302 and the stirring rod 303, and is blown into the interior of the items to be dried through the stirring rod 303, and the dust on the surface of the items to be dried is blown away and discharged through the exhaust pipe 104.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric hot air drying oven, comprising a box body (1), characterized in that: It also includes a drying tray (2), a hot air mechanism, a protective cover (3) and a stirring mechanism; A plurality of drying trays (2) are provided, and the drying trays (2) are located inside the box (1) and are used to hold items to be dried; The hot air mechanism is used to transport hot air to the interior of the box (1), and the hot air mechanism comprises a heating chamber (101), a hot air channel (102), a blast blade (103) and an exhaust pipe (104); the heating chamber (101) is arranged inside the box (1); a temperature controller (105) is installed inside the heating chamber (101); an air inlet is provided on the box (1), and the air inlet is connected to the heating chamber (101); the hot air channel (102) is provided on the side wall of the box (1); a plurality of air outlets are provided on the inner wall of the box (1), and the air outlets are connected to the heating chamber (101) through the hot air channel (102); the blast blade (103) is rotatably arranged inside the heating chamber (101); a plurality of exhaust pipes (104) are provided, and the exhaust pipe (104) is connected to the top of the box (1); The protective cover (3) is fixedly connected to the box body (1), a plurality of filter holes are provided on the protective cover (3), and the air inlet is located inside the protective cover (3); The stirring mechanism is used to stir the items to be dried in the drying tray (2).

2. The electric heating blast drying oven according to claim 1, characterized in that: The stirring mechanism comprises: A movable plate (301), the movable plate (301) being liftable and movably arranged inside the box (1); A stirring shaft (302), the stirring shaft (302) being connected to the bottom of the moving plate (301); A stirring rod (303), wherein the stirring rod (303) is fixedly connected to the outside of the stirring shaft (302).

3. The electric heating blast drying oven according to claim 2, characterized in that: A plurality of drying trays (2) are provided, two large cabinet doors (4) are hingedly connected to the cabinet body (1), a plurality of access openings are provided on the large cabinet doors (4), small cabinet doors (5) are hingedly connected to the access openings, and the drying trays (2) and the small cabinet doors (5) correspond one to one.

4. The electric heating blast drying oven according to claim 3, characterized in that: A plurality of support plates (6) are fixedly connected to the interior of the box body (1), and ventilation holes are provided on the support plates (6). The drying tray (2) is located on the top of the support plates (6).

5. The electric heating blast drying oven according to claim 4, characterized in that: A plurality of support seats (7) are fixedly connected to the top of the support plate (6), and the drying tray (2) and the support seats (7) are in sliding cooperation.

6. The electric heating blast drying oven according to claim 5, characterized in that: A support block (8) is fixedly connected to the support seat (7); the bottom end of the drying tray (2) is in contact with the support block (8); and a gap exists between the drying tray (2) and the top end of the support plate (6).

7. The electric heating blast drying oven according to claim 6, characterized in that: It also includes an auxiliary drying mechanism, which includes: a hot air pipe network (501), the hot air pipe network (501) being located inside the heating chamber (101), the hot air pipe network (501) being connected to an air inlet pipe (502), and the hot air pipe network (501) being connected to the movable plate (301) via a telescopic pipe; The movable plate (301), the stirring shaft (302) and the stirring rod (303) are all hollow structures; the stirring shaft (302) and the movable plate (301) are connected, and the stirring rod (303) and the stirring shaft (302) are connected.

8. The electric heating blast drying oven according to claim 7, characterized in that: The stirring shaft (302) is rotatably arranged at the bottom of the moving plate (301), and the stirring shaft (302) and the moving plate (301) are rotatably connected.

9. The electric heating blast drying oven according to claim 8, characterized in that: It also includes a cleaning component, which is used to clean the protective cover (3), and the cleaning component includes: A rotating frame (201), the rotating frame (201) being rotatably disposed on the protective cover (3); A brush (202), wherein the brush (202) is fixedly connected to the rotating frame (201), and the brush (202) is in contact with the protective cover (3).

10. The electric heating blast drying oven according to claim 9, characterized in that: It also includes a driving mechanism, which is used to drive the movable plate (301) to rise and fall and move, and the driving mechanism includes: A screw feeding mechanism (401), the screw feeding mechanism (401) being installed inside the box (1); An electric cylinder (402), the electric cylinder (402) being mounted on a nut seat of the screw feed mechanism (401), two movable plates (301) located on the same layer being fixedly connected via a connecting seat (403), a plurality of connecting seats (403) being fixedly connected via a connecting pipe (404), one of the plurality of connecting seats (403) being fixedly connected to an output end of the electric cylinder (402), and a through opening for the connecting pipe (404) to move is provided on the support plate (6).

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