Vacuum drying oven

Abstract

The utility model relates to a vacuum drying oven which comprises a heating box and a vacuum box located in the heating box, a heating space is formed between the heating box and the vacuum box, a plurality of heating assemblies are arranged in the heating box, and each heating assembly comprises a ceramic tube, an electric heating wire wound on the outer wall of the ceramic tube and a supporting assembly arranged on the inner wall of the heating box and used for supporting the ceramic tube. The supporting assembly comprises two oppositely-arranged supporting rings, the ceramic tube is arranged on the two supporting rings in a penetrating mode, the supporting rings are provided with locking pieces used for locking the ceramic tube, and the heating box is provided with a first thermocouple used for detecting the temperature in the heating space and a second thermocouple used for detecting the temperature in the vacuum box. The heating assembly is separated from materials in the vacuum box through the vacuum box, so that fine particles generated by volatilization of the heating assembly are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum drying, in particular to a vacuum drying box. Background Art

[0002] The vacuum drying oven is specially designed for drying heat-sensitive, easily decomposable and easily oxidizable substances. It can maintain a certain vacuum degree in the working chamber during operation and can fill the interior with inert gas, especially for quickly drying some items with complex ingredients.

[0003] The heating element and the material of the existing vacuum drying oven are generally designed to be in a closed space. During the heating process, the heating element will inevitably produce a certain degree of volatilization due to its own heat. The fine particles produced by the volatilization will settle and adhere to the surface of the material, causing pollution to the material and affecting the quality of the material. Utility Model Content

[0004] Aiming at the problems existing in the prior art, the utility model provides a vacuum drying box.

[0005] The utility model adopts the following technical scheme to solve the above technical problems: a vacuum drying box, comprising a heating box and a vacuum box located in the heating box, a heating space is formed between the heating box and the vacuum box, a plurality of heating components are arranged in the heating box, the heating components comprise a ceramic tube, a heating wire wound on the outer wall of the ceramic tube and a supporting component arranged on the inner wall of the heating box for supporting the ceramic tube, the supporting component comprises two supporting rings arranged opposite to each other, the ceramic tube is passed through the two supporting rings, a locking piece for locking the ceramic tube is arranged on the supporting ring, a first thermocouple for detecting the temperature in the heating space and a second thermocouple for detecting the temperature in the vacuum box are arranged on the heating box.

[0006] As a preferred solution, a plurality of heating components are arranged in a zigzag shape around the vacuum box.

[0007] As a preferred solution, the locking member is a first locking bolt.

[0008] As a preferred solution, two supporting square tubes are provided at the bottom of the heating box, a U-shaped slide rail is provided at the upper end of the supporting square tube, a U-shaped slide plate is provided on the bottom plate of the vacuum box for cooperating with the U-shaped slide rail, and a second locking bolt for locking the U-shaped slide rail is provided on one side of the U-shaped slide rail, the second locking bolt passes through the U-shaped slide rail and the U-shaped slide rail, and is locked with a locking nut.

[0009] As a preferred solution, a plurality of reinforcing sheets are provided on the outer wall of the vacuum box.

[0010] As a preferred solution, the front end of the vacuum box is provided with a stepped opening, the front end of the vacuum box extends into the stepped opening and cooperates with the stepped opening, the front end of the vacuum box is provided with a box opening, and the stepped opening is provided with a box door for covering the box opening.

[0011] As a preferred solution, an insulation layer is provided on the outer wall of the heating box and the outer wall of the box door, and the insulation layer is made of refractory fiber wool or alumina material.

[0012] As a preferred solution, a plurality of legs are provided at the bottom of the heating box.

[0013] The beneficial effects of the present application are as follows: 1. The present application is divided into a heating box and a vacuum box. The vacuum box is located inside the heating box. A plurality of heating components are arranged in the heating chamber to heat the heating space and heat the vacuum box, thereby heating and drying the material in the vacuum box. The heating component of the present application is separated from the material in the vacuum box by the vacuum box, thereby effectively avoiding the fine particles generated by the volatilization of the heating component, which will settle and adhere to the surface of the material and pollute the material.

[0014] 2. The present application provides a first thermocouple and a second thermocouple to facilitate detection of the temperature in the heating space and the vacuum box.

[0015] 3. The present application provides a support ring and a first locking bolt, so that the ceramic tube installation and disassembly plan has strong flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the heating box and the vacuum box of the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 It is a schematic diagram of the internal structure of the heating box of the utility model.

[0020] Markings in the figure: 1. Heating box, 11. Support legs, 2. Vacuum box, 21. Box mouth, 22. Box door, 23. Reinforcement plate, 3. Heating component, 31. Ceramic tube, 32. Heating wire, 33. Support ring, 34. First locking bolt, 35. Locking nut, 4. First thermocouple, 5. Second thermocouple, 6. Support square tube, 7. U-shaped slide rail, 71. Second locking bolt, 72. Locking nut, 8. U-shaped slide. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that in the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] See also Figure 1-4 The embodiment of the utility model provides a vacuum drying box, including a heating box 1 and a vacuum box 2 located in the heating box 1, a heating space is formed between the heating box 1 and the vacuum box 2, a plurality of heating components 3 are arranged in the heating box 1, the heating component 3 includes a ceramic tube 31, a heating wire 32 wound on the outer wall of the ceramic tube 31 and a support component arranged on the inner wall of the heating box 1 for supporting the ceramic tube 31, the support component includes two support rings 33 arranged oppositely, the ceramic tube 31 is passed through the two support rings 33, and a locking piece for locking the ceramic tube 31 is arranged on the support ring 33, a first thermocouple 4 for detecting the temperature in the heating space and a second thermocouple 5 for detecting the temperature in the vacuum box 2 are arranged on the heating box 1, the detection end of the first thermocouple 4 extends into the heating space, and the detection end of the second thermocouple 5 extends into the vacuum box 2.

[0023] The plurality of heating components 3 are arranged in a circular shape around the vacuum box 2 , a plurality of reinforcing sheets 23 are arranged on the outer wall of the vacuum box 2 , and the locking member is a first locking bolt 34 .

[0024] Specifically, two supporting square tubes 6 are provided at the bottom of the heating box 1, and the two supporting square tubes 6 are arranged in parallel along the length direction of the bottom of the heating box 1. A U-shaped slide rail 7 is provided at the upper end of the supporting square tube 6. A U-shaped slide plate 8 cooperating with the U-shaped slide rail 7 is provided on the bottom plate of the vacuum box 2. A second locking bolt 71 for locking the U-shaped slide rail 8 is provided on one side of the U-shaped slide rail 7. The second locking bolt 71 passes through the U-shaped slide rail 7 and the U-shaped slide rail 8, and is locked with a locking nut 72. There are at least two second locking bolts 71. It should be noted that the parts not described in detail in this application are all prior art.

[0025] A vacuum pump is installed on the outer wall of the heating box 1, and the vacuum pump is used to evacuate the heating box 1. The exhaust end of the vacuum pump 15 is connected to the vacuum box 2 through an exhaust pipe. A first switch valve is provided on the exhaust pipe, and the first switch valve is located on the outside of the heating box 1. An inflation pipe connected to the vacuum box 2 is also provided, and a second switch valve is provided on the inflation pipe, and the second switch valve is located on the outside of the heating box 1. Both the first switch valve and the second switch valve are solenoid valves. A pressure gauge for detecting the pressure in the vacuum box 2 is also provided on the outer wall of the heating box 1.

[0026] In addition, a box opening 21 is provided at the front end of the vacuum box 2 to facilitate the placement of materials to be dried. A stepped opening is provided at the front end of the vacuum box 2, and the front end of the vacuum box 2 extends into the stepped opening and cooperates with the stepped opening. A box opening 21 is provided at the front end of the vacuum box 2, and a box door 22 for covering the box opening 21 is provided at the stepped opening. Sealing strips are also installed around the inner side of the box door 22. When the box door 22 is closed, the box door 22 presses the sealing strip against the box opening 21 to seal the vacuum box 2. A plurality of legs 11 are provided at the bottom of the heating box 1. The right side of the box door 22 is pivotally connected to the stepped opening by a hinge, and the left side of the box door 22 is fixed to the stepped opening by a lock or a lock buckle, and a box door handle is also provided on the left side of the box door 22.

[0027] When the present application is used, close the second switch valve on the inflation pipe, put the material into the vacuum box 2, close the box door 22, open the first switch valve on the air inlet pipe, start the vacuum pump to evacuate the vacuum box 2, and after reaching a predetermined vacuum degree, close the vacuum pump and the second switch valve, and then the heating component 3 heats the heating space to heat the vacuum box 2, thereby heating and drying the material in the vacuum box 2. After drying, open the second switch valve on the inflation pipe, and air enters the vacuum box 2 through the inflation pipe. When the pressure of the vacuum box 2 is observed to be the same as the external air pressure through the pressure gauge, open the box door 22 and take out the material.

[0028] Of course, the present invention is not limited to the above-described implementations. Several other implementations based on the design concept of the present invention are provided below.

[0029] For example, in other embodiments, different from the above-described embodiments, Figure 1 and Figure 2 As shown, the outer wall of the heating box 1 and the outer wall of the box door 22 are both provided with a heat-insulating layer, and the heat-insulating layer is made of refractory fiber wool or alumina material. By providing the heat-insulating layer, a heat-insulating effect is achieved to avoid heat loss.

[0030] For example, in other embodiments, different from the embodiments described above, a control unit is further included, and the control unit is electrically connected to the first thermocouple 4, the vacuum pump, the second thermocouple 5 and the heating wire 32 respectively, and the control unit includes a PLC controller.

[0031] The present application provides the first thermocouple 4 and the second thermocouple 5, thereby facilitating detection of the temperature in the heating space and the vacuum box 2, thus achieving a double protection effect.

[0032] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model fall within the protection scope of the present utility model.

Claims

1. A vacuum drying oven, characterized in that: The invention comprises a heating box (1) and a vacuum box (2) located in the heating box (1), wherein a heating space is formed between the heating box (1) and the vacuum box (2), wherein a plurality of heating components (3) are arranged in the heating box (1), wherein the heating components (3) comprise a ceramic tube (31), a heating wire (32) wound around the outer wall of the ceramic tube (31), and a support component arranged on the inner wall of the heating box (1) for supporting the ceramic tube (31), wherein the support component comprises two support rings (33) arranged opposite to each other, wherein the ceramic tube (31) is passed through the two support rings (33), and wherein the support rings (33) are provided with locking members for locking the ceramic tube (31), and wherein the heating box (1) is provided with a first thermocouple (4) for detecting the temperature in the heating space and a second thermocouple (5) for detecting the temperature in the vacuum box (2).

2. A vacuum drying oven according to claim 1, characterized in that: A plurality of heating components (3) are arranged in a circular shape around the vacuum box (2).

3. A vacuum drying oven according to claim 1, characterized in that: The locking member is a first locking bolt (34).

4. A vacuum drying oven according to claim 1, characterized in that: The bottom of the heating box (1) is provided with two supporting square tubes (6), the upper end of the supporting square tube (6) is provided with a U-shaped slide rail (7), the bottom plate of the vacuum box (2) is provided with a U-shaped slide plate (8) matched with the U-shaped slide rail (7), one side of the U-shaped slide rail (7) is provided with a second locking bolt (71) for locking the U-shaped slide plate (8), the second locking bolt (71) passes through the U-shaped slide rail (7) and the U-shaped slide plate (8), and is locked with a locking nut (72).

5. A vacuum drying oven according to claim 1, characterized in that: A plurality of reinforcing sheets (23) are provided on the outer wall of the vacuum box (2).

6. A vacuum drying oven according to claim 1, characterized in that: The front end of the vacuum box (2) is provided with a stepped opening, the front end of the vacuum box (2) extends into the stepped opening and cooperates with the stepped opening, the front end of the vacuum box (2) is provided with a box opening (21), and the stepped opening is provided with a box door (22) for covering the box opening (21).

7. A vacuum drying oven according to claim 1, characterized in that: The outer wall of the heating box (1) and the outer wall of the box door (22) are both provided with a heat-insulating layer, and the heat-insulating layer is made of refractory fiber wool or alumina material.

8. A vacuum drying oven according to claim 1, characterized in that: The bottom of the heating box (1) is provided with a plurality of supporting legs (11).

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