Double-layer sealing structure of vacuum drying oven with observation window

Abstract

The utility model relates to vacuum drying equipment technical field, concretely relates to double -layer sealing structure of vacuum drying box with observation window, including vacuum drying box main part and sealing door, is provided with rectangular hole on the sealing door, the inner side hole mouth part department of rectangular hole is provided with inner sealing element, and the inner sealing element includes the first rectangular frame that can be dismantled and installed on the inner side of sealing door through a plurality of fastening screws, and the central position of first rectangular frame is integrally formed with first transparent observation board, and first sealing ring is arranged between first rectangular frame and sealing door, the outer side hole mouth part department of rectangular hole is provided with outer sealing element, and the outer sealing element includes the rectangular box that is fixedly installed on the front side of sealing door and is concentric with rectangular hole Setting, the front side of rectangular box is detachably installed with second transparent observation board, and second sealing ring is arranged between second transparent observation board and rectangular box. The utility model has the dual sealing effect, effectively avoided the air leakage phenomenon caused by single -layer sealing material abrasion, ageing.

Description

Technical Field

[0001] This utility model relates to the field of vacuum drying equipment technology, specifically to a double-sealed structure for a vacuum drying oven with an observation window. Background Technology

[0002] A vacuum drying oven is a device used to dry heat-sensitive, easily decomposed, and easily oxidized substances. It achieves low-temperature and rapid drying by lowering the boiling point of moisture in the material under vacuum conditions. To facilitate operators' observation of the drying process inside the oven, vacuum drying ovens are usually equipped with observation windows.

[0003] However, existing vacuum drying oven observation window sealing structures have some drawbacks. For example, most existing vacuum drying ovens use a single-layer seal between the observation window and the oven door, resulting in poor sealing performance. After prolonged use, single-layer seals are prone to deterioration due to wear and aging of the sealing material, leading to air leakage. This affects the vacuum level inside the oven, reduces drying efficiency, and may even cause drying failure. Furthermore, single-layer seals are less effective at higher vacuum levels, making them more susceptible to leakage. Additionally, some sealing structures are complex to install and disassemble, increasing maintenance costs and time. Therefore, we propose a double-layer sealing structure for vacuum drying ovens with an observation window. Utility Model Content

[0004] The purpose of this invention is to provide a double-sealed structure for a vacuum drying oven with an observation window, in order to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A vacuum drying oven with an observation window has a double-sealed structure, including a vacuum drying oven body and a sealing door hinged to the front side of the vacuum drying oven body. The sealing door has a rectangular hole, and an inner sealing element is provided at the inner opening of the rectangular hole. The inner sealing element includes a first rectangular frame that is detachably installed on the inner side of the sealing door by multiple fastening screws. A first transparent observation plate is integrally formed at the center of the first rectangular frame, and a first sealing ring is provided between the first rectangular frame and the sealing door. An outer sealing element is provided at the outer opening of the rectangular hole. The outer sealing element includes a rectangular box that is fixedly installed on the front side of the sealing door and is concentric with the rectangular hole. A second transparent observation plate is detachably installed on the front side of the rectangular box, and a second sealing ring is provided between the second transparent observation plate and the rectangular box.

[0006] Preferably, a handle is fixedly installed on the front side of the sealing door, and multiple support pads are fixedly installed on the bottom of the vacuum drying oven body.

[0007] Preferably, a rectangular insertion frame is fixedly installed on the front side of the first rectangular frame, and the rectangular insertion frame is inserted into the rectangular hole from the inside out. This setting enables plug-in positioning and assembly operations.

[0008] Preferably, the first sealing ring is fitted onto the rectangular insertion frame, and the first rectangular frame presses the first sealing ring against the inner side of the sealing door; This setting can improve the sealing effect.

[0009] Preferably, the front projection of the rectangular hole is located inside the front projection of the rectangular box, and the front side of the rectangular box is connected to the outside. This feature facilitates the normal assembly of subsequent components such as the second transparent observation panel.

[0010] Preferably, the rectangular box has a central cavity, and a front cover plate is fixedly installed on the outside of the second transparent observation plate. The front cover plate is detachably installed on the front side of the rectangular box. This feature enables the removable installation of the second transparent viewing panel.

[0011] Preferably, a rectangular ring-shaped sealing frame is fixedly installed on the rear side of the front cover plate, and the sealing frame is inserted into the central cavity. This setting enables positioning and assembly operations.

[0012] Preferably, a limiting frame is fixedly installed on the front end wall of the central cavity, and the second sealing ring is embedded in the inner end face of the sealing frame, and the sealing frame presses the second sealing ring against the front side of the limiting frame; This setting can achieve a better resealing effect. Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model features a double-layer sealing structure formed by an inner sealing element and an outer sealing element. The first sealing ring in the inner sealing element effectively seals the inside of the sealing door, while the second sealing ring in the outer sealing element forms a secondary seal between the rectangular box and the front cover plate. This double sealing effect significantly improves the sealing performance between the observation window and the sealing door, effectively avoiding air leakage caused by wear and aging of the single-layer sealing material. This ensures a stable vacuum level inside the vacuum drying oven and guarantees drying efficiency and effect.

[0013] 2. By designing a detachable connection between the first rectangular frame and the sealing door, and a detachable installation method between the front cover plate and the rectangular box, this utility model simplifies the installation and disassembly process of the inner and outer sealing components, making it easier to maintain and replace the first sealing ring, the second sealing ring, and the transparent observation plate. This reduces the complexity of the maintenance process, saves maintenance costs and time, and solves the problem of inconvenient maintenance of existing sealing structures.

[0014] 3. This utility model ensures the precise positioning of each component during assembly by using the insertion and cooperation of the rectangular insertion frame and the rectangular hole, the insertion and cooperation of the sealing frame and the central cavity, and the limiting effect of the limiting frame on the second sealing ring. This allows the sealing element to be evenly stressed, further enhancing the sealing effect. At the same time, the overall structural design is compact and reasonable, ensuring the normal observation function of the observation window while improving the stability and reliability of the entire sealing structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is one of the partial structural schematic diagrams of this utility model; Figure 4 This is the second partial structural schematic diagram of the present utility model; Figure 5 This is the third partial structural schematic diagram of this utility model; Figure 6 This is the fourth partial structural schematic diagram of the present utility model; The meanings of the labels in the diagram are as follows: 1. Vacuum drying oven body; 10. Sealed door; 11. Rectangular hole; 12. Handle; 13. Support pad; 2. Inner sealing element; 20. First rectangular frame; 21. First transparent observation plate; 22. Rectangular insertion frame; 23. First sealing ring; 3. External sealing element; 30. Rectangular box; 301. Central cavity; 31. Limiting frame; 32. Front cover plate; 33. Second transparent observation plate; 34. Sealing frame; 341. Second sealing ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Please see Figures 1-6 This utility model provides a technical solution: a double-layer sealed structure for a vacuum drying oven with an observation window, including a vacuum drying oven body 1 and a sealing door 10 hinged to the front side of the vacuum drying oven body 1. The opening, closing, and locking of the sealing door 10 are conventional technologies and will not be described in detail here. A rectangular hole 11 is provided on the sealing door 10, and an inner sealing element 2 is provided at the inner opening of the rectangular hole 11. The inner sealing element 2 includes a first rectangular frame 20 detachably installed on the inner side of the sealing door 10. A first transparent observation plate 21 is integrally formed at the center of the first rectangular frame 20. A first sealing ring 23 is provided between the observation window and the sealing door 10; an outer sealing element 3 is provided at the outer opening of the rectangular hole 11. The outer sealing element 3 includes a rectangular box 30 fixedly installed on the front side of the sealing door 10 and concentrically arranged with the rectangular hole 11. A second transparent observation plate 33 is detachably installed on the front side of the rectangular box 30. A second sealing ring 341 is provided between the second transparent observation plate 33 and the rectangular box 30. The first sealing ring 23 and the second sealing ring 341 form a double-layer sealing structure, which greatly improves the sealing performance between the observation window and the sealing door 10 and effectively prevents air leakage.

[0017] It is worth noting that the first sealing ring 23 and the second sealing ring 341 can be made of fluororubber. Fluororubber has more outstanding high temperature resistance, with a working temperature range of -20℃ to 200℃. It also has excellent oil resistance, solvent resistance and aging resistance. The high strength and deformation resistance of fluororubber can ensure good sealing under long-term extrusion and temperature fluctuations, further improving the reliability of the double-layer sealing structure.

[0018] In this embodiment, a handle 12 is fixedly installed on the front side of the sealing door 10, which makes it easier for the operator to open and close the sealing door 10 and improves the convenience of operation; multiple support pads 13 are fixedly installed at the bottom of the vacuum drying oven body 1, which can provide stable support for the vacuum drying oven body 1, prevent it from being directly in contact with the ground and being worn, and also facilitate air circulation at the bottom.

[0019] like Figure 3 and Figure 4 As shown, a rectangular insertion frame 22 is fixedly installed on the front side of the first rectangular frame 20. The rectangular insertion frame 22 is inserted and matched with the rectangular hole 11 from the inside to the outside, realizing the insertion and positioning assembly operation between the first rectangular frame 20 and the sealing door 10, making the installation process more precise and efficient, and reducing the occurrence of installation deviations.

[0020] Specifically, the first sealing ring 23 is fitted onto the rectangular insertion frame 22, and the first rectangular frame 20 presses the first sealing ring 23 tightly onto the inner side of the sealing door 10, so that the first sealing ring 23 can fully exert its sealing function, improve the sealing effect between the inner sealing element 2 and the sealing door 10, and further enhance the overall sealing performance.

[0021] Furthermore, the front projection of the rectangular hole 11 is located inside the front projection of the rectangular box 30. The front side of the rectangular box 30 is connected to the outside, providing ample space for the installation of components such as the second transparent observation plate 33, which facilitates subsequent normal assembly operations and makes the assembly process smoother.

[0022] In addition, a central cavity 301 is provided inside the rectangular box 30, and a front cover plate 32 is fixedly installed on the outside of the second transparent observation plate 33. The front cover plate 32 is detachably installed on the front side of the rectangular box 30 by multiple fastening screws, which realizes the detachable installation operation of the second transparent observation plate 33, making it convenient for the second transparent observation plate 33 to be maintained and replaced in the future.

[0023] It is worth noting that a rectangular ring-shaped sealing frame 34 is fixedly installed on the rear side of the front cover plate 32. The sealing frame 34 is inserted and matched with the central cavity 301, realizing the positioning and assembly operation between the front cover plate 32 and the rectangular box 30, ensuring the accuracy of the installation of the front cover plate 32, and helping to improve the stability of the overall structure.

[0024] It is worth noting that a limiting frame 31 is fixedly installed on the front end wall of the central cavity 301, and the second sealing ring 341 is embedded in the inner end face of the sealing frame 34. The sealing frame 34 presses the second sealing ring 341 against the front side of the limiting frame 31, which can achieve a good re-sealing effect. It works with the first sealing ring 23 to form a double seal, further improving the sealing performance of the outer sealing element 3.

[0025] When using the double-layer sealing structure of the vacuum drying oven with observation window of this utility model, firstly, the first sealing ring 23 is fitted onto the rectangular insertion frame 22 of the first rectangular frame 20, and the rectangular insertion frame 22 is inserted into the rectangular hole 11 of the sealing door 10 from the inside out, so that the first rectangular frame 20 fits against the inner side of the sealing door 10 and is fixed with fastening screws to complete the installation of the inner sealing component 2; then, the second sealing ring 341 is embedded in the inner end face of the sealing frame 34, the front cover plate 32 with the second transparent observation plate 33 is aligned with the rectangular box 30, and the sealing frame 34 is inserted into the central cavity 301, so that the second sealing ring 341 is pressed against the limiting frame 31, and the front cover plate 32 is fixed with fastening screws to complete the installation of the outer sealing component 3; The operator opens the sealed door 10 using handle 12 to insert the material, and observes the internal situation through the first transparent observation panel 21 and the second transparent observation panel 33. After completion, the sealed door 10 is opened to remove the material.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum drying oven with a double-layer sealing structure and an observation window, comprising a vacuum drying oven body (1) and a sealing door (10) hinged to the front side of the vacuum drying oven body (1), characterized in that: The sealing door (10) is provided with a rectangular hole (11). An inner sealing element (2) is provided at the inner opening of the rectangular hole (11). The inner sealing element (2) includes a first rectangular frame (20) that is detachably installed on the inner side of the sealing door (10). A first transparent observation plate (21) is integrally formed at the center of the first rectangular frame (20). A first sealing ring (23) is provided between the first rectangular frame (20) and the sealing door (10). An outer sealing element (3) is provided at the outer opening of the rectangular hole (11). The outer sealing element (3) includes a rectangular box (30) that is fixedly installed on the front side of the sealing door (10) and is concentric with the rectangular hole (11). A second transparent observation plate (33) is detachably installed on the front side of the rectangular box (30). A second sealing ring (341) is provided between the second transparent observation plate (33) and the rectangular box (30).

2. The double-layer sealed structure of the vacuum drying oven with observation window according to claim 1, characterized in that: A handle (12) is fixedly installed on the front side of the sealing door (10), and multiple support pads (13) are fixedly installed on the bottom of the vacuum drying oven body (1).

3. The double-layer sealing structure of the vacuum drying oven with observation window according to claim 1, characterized in that: A rectangular plug-in frame (22) is fixedly installed on the front side of the first rectangular frame (20), and the rectangular plug-in frame (22) is plugged into the rectangular hole (11) from the inside out.

4. The double-layer sealing structure of the vacuum drying oven with observation window according to claim 3, characterized in that: The first sealing ring (23) is fitted onto the rectangular plug frame (22), and the first rectangular frame (20) presses the first sealing ring (23) against the inner side of the sealing door (10).

5. The double-layer sealing structure of the vacuum drying oven with observation window according to claim 1, characterized in that: The front projection of the rectangular hole (11) is located inside the front projection of the rectangular box (30), and the front side of the rectangular box (30) is connected to the outside.

6. The double-layer sealing structure of the vacuum drying oven with observation window according to claim 5, characterized in that: The rectangular box (30) has a central cavity (301) inside, and a front cover plate (32) is fixedly installed on the outside of the second transparent observation plate (33). The front cover plate (32) is detachably installed on the front side of the rectangular box (30).

7. The double-layer sealing structure of the vacuum drying oven with observation window according to claim 6, characterized in that: A rectangular ring-shaped sealing frame (34) is fixedly installed on the rear side of the front cover plate (32), and the sealing frame (34) is inserted into the central cavity (301).

8. The double-layer sealing structure of the vacuum drying oven with observation window according to claim 7, characterized in that: A limiting frame (31) is fixedly installed on the front end wall of the central cavity (301), and the second sealing ring (341) is embedded in the inner end face of the sealing frame (34). The sealing frame (34) presses the second sealing ring (341) against the front side of the limiting frame (31).

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