Vacuum drying oven suitable for powder

Abstract

The utility model discloses a vacuum oven suitable for powder, which comprises a machine body, a vacuum pump and an inflator pump, the inner space of the machine body is a drying chamber, an air inlet of the vacuum pump is communicated with the drying chamber, an air outlet of the inflator pump is communicated with the drying chamber, and a plurality of bearing boxes used for containing materials are arranged in the drying chamber. A first ventilation plate is arranged on the upper wall of the bearing box, first screening holes are formed in the first ventilation plate, materials cannot pass through the first screening holes, and the interior of the bearing box communicates with the drying chamber through the first ventilation plate; an air outlet of the inflation pump can be communicated with the interiors of all the bearing boxes; a plurality of sets of sliding rails are arranged on the inner wall of the machine body, and each bearing box is arranged on the corresponding sliding rail in a sliding mode through a sliding block. According to the utility model, the phenomenon of powdery material splashing is effectively avoided, the material waste is prevented, the service life of the vacuum pump is prolonged, the drying is uniform, the airflow circulation efficiency is high, the drying speed is improved, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum ovens, in particular to a vacuum oven suitable for powders. Background Art

[0002] A vacuum oven is a chamber-type drying device that dries materials under negative pressure. It works by using a vacuum pump to extract air and moisture, creating a vacuum in the chamber, lowering the boiling point of water and accelerating drying. Vacuum ovens are specifically designed for drying heat-sensitive, easily decomposable, and oxidizable materials. Water vapor within the vacuum oven is drawn into a vacuum tube and then flushed with nitrogen, a cycle that maintains dryness while circulating the water vapor back out of the vacuum tube.

[0003] In the existing technology, when using a vacuum oven to dry powdered materials, as nitrogen is blown in, some of the powdered materials will float in the vacuum oven, causing the following undesirable results:

[0004] 1. Powdery materials will be sucked into the vacuum pump, causing damage to the vacuum pump;

[0005] 2. Powdered materials adhere to the inner wall of the equipment, in the gaps and on the observation window, which not only affects the staff's observation of the working conditions, but also causes material waste;

[0006] 3. The powdered material accumulated at the lower end of the equipment dries slowly and unevenly, reducing work efficiency.

[0007] In view of the above problems, it is very necessary to design a vacuum oven suitable for powder to solve the above problems. Utility Model Content

[0008] In view of the above-mentioned technical deficiencies, the purpose of the utility model is to provide a vacuum drying oven suitable for powder, which effectively avoids the phenomenon of powdered materials splashing, prevents material waste, extends the service life of the vacuum pump, dries evenly, has high air flow efficiency, increases the drying speed, and greatly improves work efficiency.

[0009] In order to solve the above technical problems, the present utility model adopts the following technical solutions.

[0010] The utility model provides a vacuum drying oven suitable for powder, comprising a machine body, a vacuum pump and an air pump, wherein the internal space of the machine body is a drying chamber, the air inlet of the vacuum pump is connected to the drying chamber, the air outlet of the air pump is connected to the drying chamber, a plurality of carrying boxes for holding materials are arranged in the drying chamber, the upper wall of the carrying box is provided with a first ventilation plate, the first ventilation plate is provided with a first sieve hole, the material cannot pass through the first sieve hole, the interior of the carrying box is connected to the drying chamber through the first ventilation plate; the air outlet of the air pump can be connected to the interior of all the carrying boxes; the inner wall of the machine body is provided with a plurality of slide rails, and each of the carrying boxes is slidably arranged on the slide rails through a slider.

[0011] Preferably, the carrying box includes a box body, a box cover is hingedly connected to the upper end of the box body, and the first ventilation plate is arranged on the box cover; a second ventilation plate is provided inside the box body, and the second ventilation plate divides the internal space of the box body into two parts, the upper part of the space is a drying chamber for holding powder, and the lower part of the space is an air intake chamber, the drying chamber is connected to the drying chamber through the first ventilation plate, the second ventilation plate is provided with a second sieve hole, and the material cannot pass through the second sieve hole, and the drying chamber is connected to the air intake chamber through the second ventilation plate.

[0012] Preferably, the vacuum pump and the air pump are mounted on the rear wall of the machine body, the rear wall of the machine body is provided with a pipeline groove, an air intake pipe is provided in the pipeline groove, one end of the air intake pipe is connected to the air outlet of the air pump, a plurality of horizontally arranged ejectors are connected to the air intake pipe, one end of the ejector away from the air intake pipe passes through the rear wall of the machine body and is arranged in the drying chamber, the ejector is a hollow tubular arrangement, the ejector is sealed with the rear wall of the machine body, the height of the ejector is the same as the height of the air intake cavity in the corresponding carrying box, the axial direction of the ejector is parallel to the slide rail, a sealing plug is provided on the wall of the air intake cavity close to the rear wall of the machine body, the sealing plug has a hole, the opening position of the sealing plug matches the corresponding ejector position, the ejector can be inserted into the sealing plug to communicate with the air intake cavity.

[0013] Preferably, a rear plate capable of covering the pipeline trough is installed on the rear wall of the machine body, and the vacuum pump and the air pump are installed on the rear plate.

[0014] Preferably, a carrier is mounted on the rear plate, and the vacuum pump and the air pump are mounted on the carrier.

[0015] Preferably, a locking ring is provided on the box cover, a locking buckle matching the locking ring is provided on the box body, a sealing gasket is provided at the connection between the box cover and the box body; and a handle is provided on the box body.

[0016] Preferably, the diameter of the first sieve hole is not greater than 10 μm, and the diameter of the second sieve hole is not greater than 10 μm.

[0017] Preferably, the air inlet of the air pump is connected to a nitrogen source.

[0018] The beneficial effects of the vacuum drying oven suitable for powders of the utility model are as follows:

[0019] 1. The utility model limits the powdery materials in the drying chamber through the carrying box, thus avoiding the powdery materials from splashing everywhere under the influence of the airflow, preventing the materials from entering the vacuum pump, and extending the service life of the vacuum pump;

[0020] 2. The utility model uses a carrying box to confine powdered materials in the drying chamber, preventing the materials from adhering to the inner wall of the equipment, the gaps and the observation window, saving materials and improving the efficiency of workers observing the working conditions through the observation window;

[0021] 3. The utility model enables the powdered material to be evenly placed in the drying chamber, and the circulating airflow passes completely through the drying chamber, with high airflow efficiency, which greatly improves the drying speed and makes the drying uniform and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 for Figure 1 Cross-sectional view in the AB direction;

[0025] Figure 3 It is a partial structural diagram of the carrying box in an embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 1. Machine body, 2. Vacuum pump, 3. Air pump, 4. Drying chamber, 5. Carrying box, 6. First ventilation plate, 7. Material, 8. Slide rail, 9. Box body, 10. Box cover, 11. Second ventilation plate, 12. Drying chamber, 13. Air inlet chamber, 14. Pipeline trough, 15. Air inlet pipe, 16. Ejector pin, 17. Sealing plug, 18. Back plate, 19. Carrying frame, 20. Lock, 21. Box door, 22. Handle. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] Example:

[0030] like Figures 1 to 3 As shown, the utility model provides a vacuum drying oven suitable for powder, comprising a body 1, a vacuum pump 2 and an air pump 3, the internal space of the body 1 is a drying chamber 4, the air inlet of the vacuum pump 2 is connected to the drying chamber 4, and the air outlet of the air pump 3 is connected to the drying chamber 4, and a plurality of carrying boxes 5 for holding materials 7 are arranged in the drying chamber 4, and a first ventilation plate 6 is provided on the upper wall of the carrying box 5, and a first sieve hole is provided on the first ventilation plate 6, and the material 7 cannot pass through the first sieve hole, and the interior of the carrying box 5 is connected to the drying chamber 4 through the first ventilation plate 6; the air outlet of the air pump 3 can be connected to the interior of all the carrying boxes 5; the inner wall of the body 1 is provided with a plurality of groups of horizontally arranged slide rails 8, and each of the carrying boxes 5 is slidably set on the slide rail 8 through a slider.

[0031] The air inlet of the air pump 3 is connected to a nitrogen source. The vacuum pump 2 extracts the air from the drying chamber 4, creating a vacuum. Nitrogen is then injected, replacing the atmosphere in the drying chamber 4 with dry nitrogen, thereby reducing the relative humidity. During this process, water molecules gradually evaporate from the surface of the material and are carried away by the nitrogen, achieving the desired drying effect. This drying method is suitable for quickly and efficiently drying material 7.

[0032] As a further solution of the present invention: the carrying box 5 includes a box body 9, a box cover 10 is hinged at the upper end of the box body 9, and the first ventilation plate 6 is arranged on the box cover 10; a second ventilation plate 11 is provided inside the box body 9, and the second ventilation plate 11 divides the internal space of the box body 9 into two parts, the upper part of the space is a drying chamber 12 for holding powder, and the lower part of the space is an air intake chamber 13, the drying chamber 12 is connected to the drying chamber 4 through the first ventilation plate 6, and a second sieve hole is provided on the second ventilation plate 11, and the material 7 cannot pass through the second sieve hole, and the drying chamber 12 is connected to the air intake chamber 13 through the second ventilation plate 11.

[0033] Therefore, the air pump 3 injects nitrogen, and the nitrogen passes through the air inlet chamber 13, the drying chamber 12, and the drying chamber 4 in sequence. The nitrogen and air in the drying chamber 4 are pumped out of the equipment through the vacuum pump 2. This circulating airflow completely passes through the drying chamber 12, so that the powdered material 7 in the drying chamber 12 is dried evenly, the airflow efficiency is high, the drying speed is greatly improved, and the drying is uniform and efficient.

[0034] The first ventilation plate 6 and the second ventilation plate 11 are made of ceramic, which is resistant to high temperatures and has a stable shape and is not easily deformed.

[0035] As a further solution of the present invention: the vacuum pump 2 and the air pump 3 are installed on the rear wall of the body 1, and a pipeline groove 14 is opened on the rear wall of the body 1. An air inlet pipe 15 is arranged in the pipeline groove 14. One end of the air inlet pipe 15 is connected to the air outlet of the air pump 3. A plurality of horizontally arranged ejector pins 16 are connected to the air inlet pipe 15. The end of the ejector pin 16 away from the air inlet pipe 15 passes through the rear wall of the body 1 and is arranged in the drying chamber 4. The ejector pin 16 is It is arranged in a hollow tubular shape, and the ejector pin 16 is sealed and connected to the rear wall of the body 1. The height of the ejector pin 16 is the same as the height of the air intake cavity 13 in the corresponding carrying box 5. The axial direction of the ejector pin 16 is parallel to the slide rail 8. A sealing plug 17 is provided on the wall of the air intake cavity 13 close to the rear wall of the body 1. The sealing plug 17 has an opening. The opening position of the sealing plug 17 matches the position of the corresponding ejector pin 16. The ejector pin 16 can be inserted into the sealing plug 17 to communicate with the air intake cavity 13.

[0036] like Figure 3 As shown, the sealing plug 17 corresponds to the position of the ejector pin 16 , that is, the ejector pin 16 can be inserted into the sealing plug 17 during the movement of the sealing plug 17 .

[0037] As a further solution of the present invention: a rear plate 18 capable of covering the pipeline groove 14 is installed on the rear wall of the body 1, the vacuum pump 2 and the air pump 3 are installed on the rear plate 18, and the rear plate 18 is installed on the rear wall of the body 1 by bolts.

[0038] As a further solution of the present invention: a carrier 19 is mounted on the rear plate 18, and the vacuum pump 2 and the air pump 3 are mounted on the carrier 19. Figure 2 As shown, the carriers 19 are arranged in a triangular shape to improve mechanical stability.

[0039] As a further solution of the present invention: a locking ring is provided on the box cover 10, a lock buckle 20 matching the locking ring is provided on the box body 9, a sealing gasket is provided at the connection between the box cover 10 and the box body 9; a handle 22 is provided on the box body 9 to facilitate operation by staff.

[0040] The sealing plug 17 and the sealing gasket are made of perfluororubber, which has the characteristics of good elasticity, high temperature resistance and high chemical stability.

[0041] As a further solution of the present invention: the diameter of the first sieve hole is not greater than 10μm, and the diameter of the second sieve hole is not greater than 10μm. In actual use, the sizes of the first sieve hole and the second sieve hole can be customized according to actual needs, thereby improving the versatility and practicality of the present invention.

[0042] The utility model confines the powdered material 7 in the drying chamber 12 through the carrying box 5, thereby avoiding the powdered material 7 from splashing everywhere under the influence of the airflow, preventing the material 7 from entering the vacuum pump 2, and extending the service life of the vacuum pump 2; preventing the material 7 from adhering to the inner wall of the equipment, in the gap and on the observation window, saving the material 7, and improving the efficiency of the staff in observing the working conditions through the observation window; the utility model makes the powdered material 7 evenly placed in the drying chamber 12, and the circulating airflow completely passes through the drying chamber 12, the airflow flow efficiency is high, the drying speed is greatly improved, and the drying is even and efficient.

[0043] Working Principle: After the user puts on protective gear and work clothes, places the powdered material 7 in the drying chamber 12, closes the box lid 10, locks the latch 20, places the carrying box 5 containing the powdered material 7 on the slide rail 8, and pushes the carrying box 5 to the innermost end of the drying chamber 4 by pushing the handle 22. During the movement of the carrying box 5, the ejector pin 16 contacts the sealing plug 17 and inserts into the sealing plug 17, at which point the ejector pin 16 and the air inlet chamber 13 are connected. The user closes the box door 21, starts the vacuum pump 2 for a period of time, and then starts the air pump 3. The vacuum pump 2 first extracts the air inside the drying chamber 4 to create a vacuum state as much as possible. Then, nitrogen is injected to replace the gas in the drying chamber 12 with dry nitrogen, thereby reducing the relative humidity. The nitrogen flow passes completely through the drying chamber 12, with high airflow efficiency, greatly improving the drying speed, and drying is uniform and efficient. During this process, water molecules gradually evaporate from the surface of the material 7 and are carried away by the nitrogen, thus achieving the desired drying effect.

[0044] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A vacuum oven suitable for powder, comprising a body (1), a vacuum pump (2) and an air pump (3), wherein the internal space of the body (1) is a drying chamber (4), an air inlet of the vacuum pump (2) is connected to the drying chamber (4), and an air outlet of the air pump (3) is connected to the drying chamber (4), characterized in that: A plurality of carrying boxes (5) for containing materials (7) are arranged in the drying chamber (4); a first ventilation plate (6) is arranged on the upper wall of the carrying box (5); a first sieve hole is arranged on the first ventilation plate (6); the material (7) cannot pass through the first sieve hole; the interior of the carrying box (5) is connected to the drying chamber (4) through the first ventilation plate (6); the air outlet of the air pump (3) can be connected to the interior of all the carrying boxes (5); a plurality of groups of slide rails (8) are arranged on the inner wall of the body (1); each of the carrying boxes (5) is slidably arranged on the slide rail (8) through a slider.

2. A vacuum oven suitable for powder according to claim 1, characterized in that: The carrying box (5) comprises a box body (9), the upper end of which is hingedly connected with a box cover (10), and the first ventilation plate (6) is arranged on the box cover (10); a second ventilation plate (11) is arranged inside the box body (9), and the second ventilation plate (11) divides the internal space of the box body (9) into two parts, the upper part of which is a drying chamber (12) for containing powder, and the lower part of which is an air inlet chamber (13), and the drying chamber (12) is connected to the drying chamber (4) through the first ventilation plate (6); the second ventilation plate (11) is provided with a second sieve hole, and the material (7) cannot pass through the second sieve hole; the drying chamber (12) is connected to the air inlet chamber (13) through the second ventilation plate (11).

3. A vacuum oven suitable for powder according to claim 2, characterized in that: The vacuum pump (2) and the air pump (3) are mounted on the rear wall of the machine body (1). The rear wall of the machine body (1) is provided with a pipeline groove (14). An air inlet pipe (15) is arranged in the pipeline groove (14). One end of the air inlet pipe (15) is connected to the air outlet of the air pump (3). The air inlet pipe (15) is connected to a plurality of horizontally arranged ejector pins (16). One end of the ejector pin (16) away from the air inlet pipe (15) passes through the rear wall of the machine body (1) and is arranged in the drying chamber (4). The ejector pin (16) is arranged in a hollow tubular shape. The ejector pin (16) is sealedly connected to the rear wall of the machine body (1); the height of the ejector pin (16) is the same as the height of the air inlet cavity (13) in the corresponding carrying box (5); the axial direction of the ejector pin (16) is parallel to the slide rail (8); a sealing plug (17) is provided on the wall of the air inlet cavity (13) close to the rear wall of the machine body (1); the sealing plug (17) has an opening; the opening position of the sealing plug (17) matches the position of the corresponding ejector pin (16); the ejector pin (16) can be inserted into the sealing plug (17) to communicate with the air inlet cavity (13).

4. A vacuum oven suitable for powder according to claim 3, characterized in that: A rear plate (18) capable of covering the pipeline groove (14) is installed on the rear wall of the machine body (1), and the vacuum pump (2) and the air pump (3) are installed on the rear plate (18).

5. A vacuum oven suitable for powder according to claim 4, characterized in that: A carrier frame (19) is mounted on the rear plate (18), and the vacuum pump (2) and the air pump (3) are mounted on the carrier frame (19).

6. A vacuum oven suitable for powder according to claim 2, characterized in that: The box cover (10) is provided with a locking ring, the box body (9) is provided with a locking buckle (20) matched with the locking ring, and a sealing gasket is provided at the connection between the box cover (10) and the box body (9); and the box body (9) is provided with a handle (22).

7. A vacuum oven suitable for powders according to claim 2, characterized in that: The diameter of the first mesh is no greater than 10 μm, and the diameter of the second mesh is no greater than 10 μm.

8. A vacuum oven suitable for powders according to any one of claims 2 to 7, characterized in that: The air inlet of the inflation pump (3) is connected to a nitrogen source.

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