Vacuum drying oven

Abstract

The utility model relates to the technical field of drying equipment, in particular to a vacuum drying oven which comprises an oven body, an air pipe is arranged in the oven body and connected with a vacuum generating pump, a pressure release valve is arranged on the oven body, a cavity is formed in the oven body, a tray is arranged in the cavity, and a vacuum pump is arranged in the tray. By means of the structures of limiting rods, compressed springs, pulling plates, limiting plates, limiting grooves, clamping grooves, supporting plates, supporting blocks, springs and heat conduction pipes, the problems that in the drying box, the drying box is fixed to a connecting block only through insertion fit of positioning holes and positioning rods, shaking is generated in the rotating process, the drying effect is affected, and the drying effect is affected are solved. And the upper heating pipe and the lower heating pipe still cannot provide uniform heat distribution, so that the material drying is not uniform.

Description

Technical Field

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

[0002] A vacuum drying oven is a device that removes moisture and oil from internal components of the oven by pumping out the air inside the oven to a predetermined vacuum degree. It is designed specifically for drying heat-sensitive, easily decomposed, and easily oxidized substances and is suitable for processing some products with higher added value. When drying materials, the materials are placed on a tray, and the tray is placed at a fixed position in the vacuum drying oven. During the drying process of the materials by the vacuum drying oven, the front, back, left, and right positions of the tray are unevenly heated, resulting in low drying efficiency.

[0003] Moreover, in the application document with the publication number CN219797671 U, a vacuum drying oven is mentioned. When drying materials, the materials are first placed on a tray, then the door panel of the drying oven is opened, the positioning holes at the bottom of the tray are inserted and matched with the positioning rods, and then the cover plate is closed. The motor is started, and the motor drives the rotating disk and the tray to rotate. The upper heating tube and the lower heating tube dry the materials, thereby improving the drying efficiency of the materials. However, there are still certain defects that need to be optimized. The specific defects are as follows: In this drying oven, it is only fixed on the connecting block through the insertion and matching of the positioning holes and the positioning rods. This fixing method will cause shaking during the rotation process, affecting the drying effect, and the upper and lower heating tubes still cannot provide a uniform heat distribution, resulting in uneven drying of the materials.

[0004] Therefore, it is particularly important to design a vacuum drying oven to change the above technical defects and improve the overall practicality. Content of the Utility Model

[0005] The purpose of the utility model is to provide a vacuum drying oven to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution:

[0007] A vacuum drying oven includes a box body. An air pipe is arranged inside the box body, and the air pipe is connected to a vacuum pump. A pressure relief valve is arranged on the box body. A cavity is arranged inside the box body, and a tray is arranged inside the cavity;

[0008] The bottom of the tray is provided with a first limiting post, the first limiting post is connected to a clamping block, one end of the clamping block is provided with an avoidance groove, a limiting rod is arranged inside the avoidance groove, a compression spring is arranged outside the limiting rod, a pull plate is arranged at one end of the limiting rod, a limiting plate is arranged outside the limiting rod, the limiting rod is connected to a limiting groove, a clamping groove is arranged at the top end of the limiting groove, the first limiting post is connected to a second limiting post, a supporting plate is arranged at the bottom end of the second limiting post, supporting blocks are symmetrically arranged at the top end of the supporting plate, a heat conduction pipe is arranged at the top end of the supporting block, the heat conduction pipe is connected to a heater, a plurality of springs are arranged at the bottom end of the supporting block, a driven gear is arranged at the bottom end of the supporting plate, a rotating shaft is arranged at the bottom end of the driven gear, the driven gear is meshed and connected to a driving gear, and the driving gear is connected to a driving motor.

[0009] As a preferred solution of the present utility model, the box body is connected to a maintenance door, an observation window for observing the situation is arranged on the maintenance door, the box body and the maintenance door are connected through a lock catch, and a sealing gasket is arranged at the contact position between the maintenance door and the box body.

[0010] As a preferred solution of the present utility model, a heating pipe is arranged on the inner side wall of the box body, the heating pipe is connected to a heating element, and a control panel is arranged on the box body, and the control panel is electrically connected to a vacuum generating pump, a pressure relief valve, a heater, a driving motor, and an electric heating element.

[0011] As a preferred solution of the present utility model, the clamping block and the clamping groove are adapted to each other, the limiting groove and the limiting rod are adapted to each other, and the heat conduction pipe is arranged in a spiral shape.

[0012] As a preferred solution of the present utility model, an installation frame is arranged at one end of the limiting rod, and an installation groove is arranged at one end of the clamping block, the installation frame and the installation groove are fixedly connected, and the limiting plate and the limiting rod are fixedly connected.

[0013] As a preferred solution of the present utility model, the output shaft of the driving motor is key-connected to the driving gear, the rotating shaft and the box body are connected through a bearing seat, and a heat insulation protective sleeve is arranged outside the heater.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. In the present utility model, a vacuum drying oven is provided. By using the structure of a limiting rod, a compression spring, a pulling plate, a limiting plate, a limiting groove, a clamping groove, a support plate, a support block, a spring, and a heat conduction tube, the position of the tray and the support plate is initially positioned through the clamping block and the clamping groove. Subsequently, the position of the tray and the support plate is fixed by the adaptation between the limiting rod and the limiting groove, replacing the original fixing method that only relies on plug-in connection. When disassembling later, only need to pull the pulling plate to release the limiting rod from the inside of the limiting groove. At the same time, the spiral heat conduction tube is in close contact with the bottom of the tray, facilitating the tray to be evenly heated, solving the problem that in this drying oven, it is only fixed on the connecting block through the plug-in cooperation of the positioning hole and the positioning rod. This fixing method will cause shaking during rotation, affecting the drying effect, and the upper and lower heating tubes still cannot provide a uniform heat distribution, resulting in uneven drying of the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a planar structure diagram of the whole of the present utility model;

[0017] Figure 2 is a structural schematic diagram of the clamping block assembly of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the outside of the whole of the present utility model.

[0019] In the figure: 1, box body; 101, air pipe; 102, vacuum pump; 103, pressure relief valve; 104, cavity; 2, tray; 201, first limiting column; 202, clamping block; 203, avoidance groove; 204, limiting rod; 205, compression spring; 206, pulling plate; 207, limiting plate; 3, limiting groove; 301, clamping groove; 302, second limiting column; 303, support plate; 304, support block; 305, heat conduction tube; 306, heater; 307, spring; 4, driven gear; 401, rotating shaft; 402, driving gear; 403, driving motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] For the embodiments, please refer to Figures 1-3 , the present utility model provides a technical solution:

[0025] A vacuum drying oven, comprising a box body 1. Inside the box body 1, there is an air pipe 101. The air pipe 101 is connected to a vacuum pump 102. On the box body 1, there is a pressure relief valve 103. Inside the box body 1, there is a cavity 104. Inside the cavity 104, there is a tray 2. At the bottom of the tray 2, there is a first limit post 201. The first limit post 201 is connected to a clamping block 202. At one end of the clamping block 202, there is an avoidance groove 203. Inside the avoidance groove 203, there is a limit rod 204. Outside the limit rod 204, there is a compression spring 205. At one end of the limit rod 204, there is a pull plate 206. Outside the limit rod 204, there is a limit plate 207. The limit rod 204 is connected to a limit groove 3. At the top of the limit groove 3, there is a clamping groove 301. The first limit post 201 is connected to a second limit post 302. At the bottom end of the second limit post 302, there is a support plate 303. At the top of the support plate 303, symmetrically arranged support blocks 304 are provided. At the top of the support blocks 304, there is a heat conduction pipe 305. The heat conduction pipe 305 is connected to a heater 306. At the bottom of the support blocks 304, there are several springs 307. At the bottom of the support plate 303, there is a driven gear 4. At the bottom of the driven gear 4, there is a rotating shaft 401. The driven gear 4 is meshed and connected to a driving gear 402. The driving gear 402 is connected to a driving motor 403. Place the material to be dried on the tray 2. Utilize the preliminary positioning of the clamping block 202 and the clamping groove 301, and the adaptation of the limit rod 204 and the limit groove 3 to firmly fix the tray 2 on the support plate 303. Start the vacuum pump 102 through the control panel to evacuate the inside of the box body 1 to a vacuum state. Subsequently, close the pressure relief valve 103 to maintain the vacuum environment. Start the heater 306, and evenly transfer the heat to the tray 2 and the material through the spiral heat conduction pipe 305 to achieve an efficient and uniform drying effect. During the drying process, the driving motor 403 can be started through the control panel to drive the driving gear 402 to rotate, and then drive the driven gear 4 and the tray 2 to rotate. After drying is completed, open the pressure relief valve 103 to release the vacuum, open the inspection door to take out the dried material, and complete the entire drying process;

[0026] Among them, the box body 1 is connected to the maintenance door. An observation window for observing the situation is provided on the maintenance door. The box body 1 and the maintenance door are connected by a lock. A sealing gasket is provided at the contact between the maintenance door and the box body 1, which is convenient for later maintenance. A heating pipe is provided on the inner side wall of the box body 1. The heating pipe is connected to the heating element, and a control panel is provided on the box body 1. The control panel is electrically connected to the vacuum pump 102, the pressure relief valve 103, the heater 306, the drive motor 403, and the electric heating element. It is convenient to start the components. Among them, the vacuum pump 102, the pressure relief valve 103, the heater 306, the drive motor 403, and the electric heating element are all existing mature technologies. Therefore, their principles and circuits will not be elaborated here. The block 202 is adapted to the slot 301, and the limiting slot 3 is adapted to the limiting rod 204. The heat conduction pipe 305 is arranged in a spiral shape, which is convenient for uniform heating. One end of the limiting rod 204 is provided with a mounting bracket, and one end of the block 202 is provided with a mounting groove. The mounting bracket and the mounting groove are fixedly connected. The limiting plate 207 and the limiting rod 204 are fixedly connected, which is convenient for the limiting rod and the limiting slot to cooperate with each other. The output shaft of the drive motor 403 is key-connected to the driving gear 402. The rotating shaft 401 is connected to the box body 1 through a bearing seat. The outside of the heater 306 is provided with a heat insulation protective sleeve, which is convenient for driving the tray to rotate.

[0027] The working process of the present utility model: When using this vacuum drying oven, first place the material to be dried on the tray 2. Utilize the preliminary positioning of the block 202 and the slot 301, and the adaptation of the limiting rod 204 and the limiting slot 3 to firmly fix the tray 2 on the support plate 303. Start the vacuum pump 102 through the control panel to evacuate the inside of the box body 1 to a vacuum state. Then close the pressure relief valve 103 to maintain the vacuum environment. Start the heater 306, and evenly transfer the heat to the tray 2 and the material through the spiral heat conduction pipe 305 to achieve an efficient and uniform drying effect. During the drying process, the drive motor 403 can be started through the control panel to drive the driving gear 402 to rotate, and then drive the driven gear 4 and the tray 2 to rotate. After the drying is completed, open the pressure relief valve 103 to release the vacuum, open the maintenance door, and take out the dried material to complete the entire drying process.

[0028] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum drying oven, comprising a box body (1), characterized in that: An air pipe (101) is provided inside the box (1), the air pipe (101) is connected to a vacuum generating pump (102), a pressure relief valve (103) is provided on the box (1), a cavity (104) is provided inside the box (1), and a tray (2) is provided inside the cavity (104); A first limiting column (201) is provided at the bottom of the tray (2), the first limiting column (201) is connected to a clamping block (202), one end of the clamping block (202) is provided with an avoidance groove (203), a limiting rod (204) is provided inside the avoidance groove (203), a compression spring (205) is provided outside the limiting rod (204), a pull plate (206) is provided at one end of the limiting rod (204), a limiting plate (207) is provided outside the limiting rod (204), the limiting rod (204) is connected to a limiting groove (3), a clamping groove (301) is provided at the top end of the limiting groove (3), the first limiting column (201) is connected to a second limiting column (302), a support plate (303) is provided at the bottom end of the second limiting column (302), a support block (304) is symmetrically provided at the top end of the support plate (303), a heat pipe (305) is provided at the top end of the support block (304), the heat pipe (305) is connected to the heater (306), a plurality of springs (307) are provided at the bottom end of the support block (304), a driven gear (4) is provided at the bottom end of the support plate (303), a rotating shaft (401) is provided at the bottom end of the driven gear (4), the driven gear (4) is meshedly connected to the driving gear (402), and the driving gear (402) is connected to the driving motor (403).

2. A vacuum drying oven according to claim 1, characterized in that: The box body (1) is connected to an inspection door, and an observation window for observing the situation is provided on the inspection door. The box body (1) and the inspection door are connected via a lock, and a sealing gasket is provided at the contact point between the inspection door and the box body (1).

3. A vacuum drying oven according to claim 1, characterized in that: The inner side wall of the box body (1) is provided with a heating tube, and the heating tube is connected to the heating element. The box body (1) is provided with a control panel, and the control panel is electrically connected to the vacuum generating pump (102), the pressure relief valve (103), the heater (306), the driving motor (403), and the electric heating element.

4. A vacuum drying oven according to claim 1, characterized in that: The clamping block (202) is matched with the clamping slot (301), the limiting slot (3) is matched with the limiting rod (204), and the heat conducting pipe (305) is arranged in a spiral shape.

5. A vacuum drying oven according to claim 1, characterized in that: One end of the limiting rod (204) is provided with a mounting frame, and one end of the clamping block (202) is provided with a mounting groove, the mounting frame and the mounting groove are fixedly connected, and the limiting plate (207) and the limiting rod (204) are fixedly connected.

6. A vacuum drying oven according to claim 1, characterized in that: The output pump of the driving motor (403) is key-connected to the driving gear (402), the rotating shaft (401) is connected to the box (1) via a bearing seat, and a heat-insulating protective sleeve is provided on the outside of the heater (306).

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