CN218565921U

CN218565921U - Decompression drying device

Info

Publication number: CN218565921U
Application number: CN202222496853.1U
Authority: CN
Inventors: 杨轲; 于涛
Original assignee: China Pharmaceutical University
Current assignee: China Pharmaceutical University
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-03-03
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses a decompression drying device, which comprises a drying box and a dry vacuum pump, wherein a sealing gasket is arranged between the box body and the box door of the drying box; the top, the back, the left side and the right side in the box body are provided with an electric heating tube and an infrared heating lamp tube, the periphery of the box body is provided with a heat preservation layer, and the bottom of the box body is provided with a condensation collecting tray; the bottom of the box body is provided with a nitrogen inlet, the top of the box body is provided with a nitrogen outlet and a vacuum inlet, and the outer side of the box body is provided with a microcomputer control system. The utility model heats through the combination of the electric heating tube and the infrared heating lamp tube, improves the drying efficiency, saves electricity and energy, and avoids the uneven heating temperature of the experimental ware; the double-layer seal is arranged, so that the seal is reliable; a dry vacuum pump is adopted, a vacuum buffer tank and a check valve are additionally arranged, and the pollution caused by the fact that a water circulating pump sucks back to a drying chamber in the drying process is avoided. The microcomputer control system can obviously improve the automation level of the equipment. The utility model discloses can high-efficiently realize laboratory glassware's drying, can the wide application.

Description

Decompression drying device

Technical Field

The utility model relates to a laboratory vessel drying device especially relates to a decompression drying device.

Background

Vacuum drying is a drying method in which a material is placed under negative pressure and is properly heated to reach a boiling point under a negative pressure state or is solidified by cooling, and then the material is dried through a melting point. The vacuum drying technology is widely applied to occasions such as chemical experiment glassware and thermosensitive materials.

The existing vacuum decompression drying box generally utilizes a liquid vacuum pump to realize decompression, but adopts a water circulation vacuum pump as power equipment, and circulating water is easy to suck back to a drying chamber in the drying process to cause pollution; in addition, a single heat source or a single direction is usually adopted for heating in the drying box, and the heating elements are unreasonable in arrangement, so that glassware in different area positions is easily cracked due to uneven heating temperature; in addition, the box door and the drying chamber are usually sealed in a single layer mode, the box door is easy to age and is not tight in sealing after being used for a long time, the vacuum degree is reduced, the drying time is prolonged, and the drying efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a decompression drying device of even heating, high-efficient drying, effective sealing, avoid polluting.

The technical scheme is as follows: the utility model provides a decompression drying device, which comprises a drying box and a vacuum pump, wherein a double-layer sealing gasket is arranged between a box body and a box door of the drying box; the top, the back, the left side and the right side in the drying box body are provided with electric heating pipes and infrared heating lamp tubes, the periphery of the drying box body is provided with a heat preservation layer, and the bottom of the drying box body is provided with a condensation collecting tray; the top of the box body is provided with a vacuum access port connected with a vacuum pump.

Preferably, a microcomputer control system is arranged on the outer side of the box body, the microcomputer control system comprises a power switch, a vacuum pump switch, an infrared lamp tube switch and a touch digital display control panel, a temperature sensor and a pressure sensor are arranged in the box body, and the numerical values of the temperature sensor and the pressure sensor are displayed in real time through the touch digital display control panel; the touch digital display control panel can set temperature and pressure at will according to actual needs, the temperature sensor can automatically adjust the running power of the motor of the electric heater according to the setting, and the pressure sensor can automatically adjust the running power of the motor of the vacuum pump according to the setting.

Preferably, the vacuum pump is a dry vacuum pump, a vacuum buffer tank is connected between the drying box and the dry vacuum pump, a check valve is arranged between the vacuum buffer tank and the dry vacuum pump, the vacuum buffer tank can receive condensed liquid generated in the drying process, and meanwhile, the check valve can prevent dirt in the vacuum pump from being sucked back into the vacuum drying box to pollute equipment.

Preferably, the bottom of the box body is provided with a nitrogen inlet connected with a nitrogen storage tank, and the top of the box body is provided with a nitrogen discharge port.

Preferably, the electric heating tube and the infrared heating lamp tube are arranged in a crossed mode, the infrared heating lamp tube is high in heat efficiency, high in power density, rapid in temperature rise and strong in penetrating capacity, drying efficiency is improved, electricity and energy are saved, and meanwhile the problems that glassware is expanded, deformed or changed in quality due to uneven heating temperature can be avoided.

Preferably, the box body outside is equipped with annular first layer sealed pad, and the chamber door inboard is equipped with corresponding annular second layer sealed pad, and two sealed pads adopt special fluorine dragon combined material, closely laminate after closing the chamber door, can keep high leakproofness for a long time, and this material is high temperature resistant, ageing resistance, corrosion-resistant.

Preferably, the material of the heat-insulating layer is refractory alumina silicate fiber cotton.

Preferably, the surface of the condensation collection tray is paved with a liquid capture net, the surface of the liquid capture net is a super-hydrophilic surface, condensed liquid is effectively captured, and the phenomenon that the drying effect is influenced due to the fact that the condensed liquid is volatilized again is avoided.

Preferably, the outer side of the box body is provided with a buckle which is matched with the box door to lock the box door.

Preferably, the middle part of the box door is provided with a heat insulation organic glass window.

The working principle is as follows: the vacuum pump is utilized to generate negative pressure in the drying oven, so that the boiling point of the liquid is reduced, the temperature in the drying oven is raised by heating the electric heating pipe and the infrared heating lamp tube, so that the liquid adhered to the material to be dried is gasified, the drying purpose is achieved, and the gasified liquid component is collected in a condensing manner. Before and after drying, nitrogen is introduced into the drying box to replace the gas in the box so as to ensure the cleanliness of the drying box and release negative pressure.

Has the beneficial effects that: compared with the prior art, the utility model, have following advantage: 1. the infrared heating lamp tube is arranged, and the advantages of high thermal efficiency, high power density, rapid temperature rise, strong penetrating power and the like are utilized, and the electric heating tube is combined to improve the drying efficiency, save electricity and energy and avoid the problems of thermal expansion, deformation or quality change and the like of glassware caused by uneven heating temperature; 2. the double-layer sealing is arranged, and a Teflon composite material with high temperature resistance, ageing resistance and corrosion resistance is adopted, so that the problem of poor sealing of the conventional device is solved; 3. a liquid-free dry vacuum pump is adopted to replace a water circulating pump, and a vacuum buffer tank and a check valve are additionally arranged, so that the pollution caused by the fact that the water circulating pump sucks water to a drying chamber in the drying process is avoided; 4. the microcomputer control system can realize one-key start and stop, is unattended, and obviously improves the automation level of equipment.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a decompression drying apparatus includes a drying cabinet 1 and a dry vacuum pump 2, and a vacuum buffer tank 3 and a check valve 4 are connected in sequence between the drying cabinet 1 and the dry vacuum pump 2.

The drying box 1 comprises a box body 11 and a box door 12, the box body 11 is rotatably connected with the box door 12 through two connecting pieces on one adjacent side, two fixing buckles are arranged on the other side of the box body 11, and the two fixing buckles are matched with one side of the box door 12 to lock the box door 12. The contact surface of the box body 11 and the box door 12 is annular, a first layer of sealing gasket 111 is arranged on the outer side of the box body 11, a second layer of sealing gasket 121 corresponding to the box door is arranged on the inner side of the box door 12, the two layers of sealing gaskets are tightly attached to each other to realize the sealing of the drying box, and all the sealing gaskets are made of Teflon composite materials. The middle part of the box door 12 is provided with a heat insulation organic glass window.

The electric heating tube 112 and the infrared heating lamp tube 113 are arranged at the top, the back, the left side and the right side in the drying box body 11, and the electric heating tube 112 and the infrared heating lamp tube 113 are arranged in a crossed manner; the periphery of the box body 11 is provided with a heat-insulating layer 114, and the heat-insulating layer 114 is made of refractory alumina silicate fiber cotton; the bottom of the condensation collection tray 115 is provided with a condensation collection tray 115, the surface of the condensation collection tray 115 is paved with a liquid capture net, and the surface of the liquid capture net is a super-hydrophilic surface; the bottom of the box body 11 is provided with a nitrogen inlet 131, and the nitrogen inlet 131 is connected with a nitrogen storage tank and is used for introducing nitrogen into the box body 11; the top is provided with a nitrogen gas discharge port 132 and a vacuum inlet 133, and the vacuum inlet 133 is connected with a vacuum buffer tank through a pipeline.

The outer side of the box body 11 is provided with a microcomputer control system 5, and the microcomputer control system 5 comprises a power switch 51, a vacuum pump switch 52, an infrared lamp switch 53 and a touch type digital display control panel 54. A temperature sensor and a pressure sensor are arranged in the box body 11, the control panel 54 can display the numerical value of the sensor in real time, meanwhile, the temperature and the pressure can be set randomly according to the actual requirement, the temperature sensor can automatically adjust the running power of the motor of the electric heater according to the setting, and the pressure sensor can automatically adjust the running power of the motor of the vacuum pump according to the setting; the microcomputer control system 5 can realize one-key start and stop.

The utility model discloses during the specific use, put chemical laboratory ware on suitable supporter, put into drying cabinet 1 with the supporter, close chamber door 12. Nitrogen gas is introduced into the drying box 1 through the nitrogen gas inlet 131 to replace the gas in the drying box 1, and the replaced gas is discharged from the nitrogen gas outlet 132. And closing the nitrogen inlet 131 and the nitrogen outlet 132, opening the dry vacuum pump 2, and opening the electric heating tube 112 and the infrared heating lamp tube 113 to perform negative pressure heating and drying on the experimental vessel. After drying, nitrogen is introduced into the drying oven 1 again, negative pressure is released, and the oven door 12 is opened to take out the drying apparatus.

Claims

1. A decompression drying device comprises a drying box (1) and a vacuum pump (2), and is characterized in that a double-layer sealing gasket is arranged between a box body (11) and a box door (12) of the drying box (1); the top, the back and the left and right sides in the drying box body (11) are provided with an electric heating tube (112) and an infrared heating lamp tube (113), the periphery is provided with a heat preservation layer (114), and the bottom is provided with a condensation collection tray (115); the top of the box body (11) is provided with a vacuum access opening (133) connected with the vacuum pump (2).

2. A decompression drying device according to claim 1, wherein a microcomputer control system (5) is arranged outside the box body (11), the microcomputer control system (5) comprises a power switch (51), a vacuum pump switch (52), an infrared lamp switch (53) and a touch digital display control panel (54); a temperature sensor and a pressure sensor are arranged in the box body (11), and the numerical values of the temperature sensor and the pressure sensor are displayed in real time through a touch type digital display control panel (54).

3. A reduced-pressure drying apparatus according to claim 1, wherein the vacuum pump (2) is a dry vacuum pump, a vacuum buffer tank (3) is connected between the drying box (1) and the vacuum pump (2), and a check valve (4) is provided between the vacuum buffer tank (3) and the dry vacuum pump (2).

4. A reduced-pressure drying apparatus according to claim 1, wherein the tank (11) is provided with a nitrogen inlet (131) at the bottom for connecting a nitrogen storage tank and a nitrogen outlet (132) at the top, both of which are provided with valves.

5. A decompression drying apparatus according to claim 1, wherein said electric heating tube (112) and said infrared heating lamp (113) are arranged crosswise.

6. A decompression drying device according to claim 1, characterized in that the outer side of the box body (11) is provided with a first layer of annular sealing gasket (111), the inner side of the box door (12) is provided with a second layer of corresponding annular sealing gasket (121), and the two sealing gaskets are made of teflon composite material.

7. A decompression drying apparatus according to claim 1, wherein the surface of the condensation collection tray (115) is laid with a liquid capturing net, and the surface of the liquid capturing net is a super hydrophilic surface.

8. A decompression drying device according to claim 1, characterized in that the outer side of the box body (11) is provided with a buckle (14) which is matched with the door (12) to realize locking of the door.

9. A reduced-pressure drying apparatus according to claim 1, wherein the door (12) is provided with an insulated plexiglas window (122) in the middle.

10. A reduced-pressure drying device according to claim 1, characterized in that the insulating layer (114) is made of refractory alumina silicate fiber cotton.