Vacuum layer sealing device for thermos bottle
Patent Information
- Application Number
- CN202522022935.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-19
AI Technical Summary
[0003]近年来，一些改进型的密封装置通过引入胶水或焊接技术来增强密封效果，然而，胶水密封可能因胶水的老化或化学性质不稳定而导致密封失效，而焊接工艺则因保温瓶专用性的操作难度和成本问题限制了其广泛应用
1、热熔环的使用使得密封过程简单易行，且能够根据保温瓶内壁的形状适应形成紧密的密封层。其次，各个部件的材质选择合理且安全，热熔环采用食品级硅胶，封闭板和挤压环采用食品级304不锈钢，支撑连接架采用食品级聚四氟乙烯，这些材料都符合食品安全标准，确保在使用过程中的健康安全性。
Smart Images
Figure CN224639570U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing components technology, specifically to a vacuum layer sealing device for thermos bottles. Background Technology
[0002] The heat preservation performance of a thermos flask relies heavily on the vacuum layer between the inner and outer liner, and the sealing quality of this vacuum layer directly determines the durability of the heat preservation effect. The vacuum layer sealing process for thermos flasks typically employs either metal fusion sealing or mechanical extrusion sealing with rubber sealing rings. Metal fusion sealing requires complex flame heating equipment, while rubber sealing relies on high-precision molds to ensure proper fit.
[0003] In recent years, some improved sealing devices have enhanced the sealing effect by introducing adhesives or welding techniques. However, adhesive seals may fail due to the aging of the adhesive or unstable chemical properties, while welding processes are limited in their widespread application due to the operational difficulties and costs associated with the specific use of thermos bottles. Utility Model Content
[0004] To address the aforementioned problems, this utility model proposes a vacuum sealing device for a thermos bottle, comprising a sealing ring, a supporting connecting frame above the sealing ring, the supporting connecting frame including a receiving ring placed above the sealing ring, a middle ring fixed to the top of the receiving ring, the outer diameter of the middle ring being smaller than the outer diameter of the receiving ring, and a connecting ring fixed to the top of the middle ring; a heat fusion ring is disposed above the supporting connecting frame, the outer diameter of the connecting ring being smaller than the outer diameter of the heat fusion ring, the heat fusion ring being placed on the connecting ring, and a closing ring disposed above the heat fusion ring.
[0005] Furthermore, a compression ring is fixed to the bottom of the closed ring; after the hot melt ring is softened, the compression ring can be embedded in the hot melt ring.
[0006] Furthermore, the hot melt ring is a food-grade silicone ring.
[0007] Furthermore, the sealing plate and extrusion ring are made of food-grade 304 stainless steel, and the top of the sealing plate undergoes surface electrolytic polishing treatment.
[0008] Furthermore, the support frame is made of food-grade polytetrafluoroethylene rings.
[0009] The beneficial effects of this utility model are as follows: 1. The use of a heat-fusion ring makes the sealing process simple and easy, and can adapt to the shape of the inner wall of the thermos to form a tight sealing layer. Secondly, the materials chosen for each component are reasonable and safe. The heat-fusion ring is made of food-grade silicone, the sealing plate and compression ring are made of food-grade 304 stainless steel, and the support frame is made of food-grade polytetrafluoroethylene. These materials all meet food safety standards, ensuring health and safety during use.
[0010] 2. This sealing device has good versatility and adaptability, and can be applied to thermos bottles of different sizes and shapes. The design of the central ring further enhances the control of the flow of the hot melt ring, avoiding material waste and structural instability. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the exploded structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention when assembled.
[0012] The reference numerals in the attached drawings are explained as follows: 1. Sealing ring; 2. Support connecting frame; 201. Receiving ring; 202. Middle ring; 203. Connecting ring; 3. Hot melt ring; 4. Closing ring; 5. Extrusion ring. Detailed Implementation
[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0015] The present invention will be further described below with reference to the accompanying drawings: Vacuum sealing device for thermos bottles, such as Figure 1 and Figure 2As shown, the device includes a sealing ring 1, a support connecting frame 2 above the sealing ring 1, a receiving ring 201 placed above the sealing ring 1, a middle ring 202 fixed to the top of the receiving ring 201, the outer diameter of the middle ring 202 being smaller than the outer diameter of the receiving ring 201, and a connecting ring 203 fixed to the top of the middle ring 202; a hot melt ring 3 is placed above the support connecting frame 2, the outer diameter of the connecting ring 203 being smaller than the outer diameter of the hot melt ring 3, the hot melt ring 3 is placed on the connecting ring 203, and a closing ring 4 is placed above the hot melt ring 3; a compression ring 5 is fixed to the bottom of the closing ring 4, and the compression ring 5 can be embedded in the hot melt ring 3 after the hot melt ring 3 is softened.
[0016] During installation, the support connecting frame 2 is first placed on the sealing ring 1, and the hot melt ring 3 is placed on the connecting ring 203. During processing, the hot melt ring 3 is heated to soften it. Since the outer diameter of the connecting ring 203 is smaller than that of the hot melt ring 3, the softened hot melt ring 3 can flow to fill the space between the connecting ring 203 and the thermos bottle wall. After cooling, the connecting ring 203 and the inner wall of the thermos bottle are completely sealed. The sealing ring 4 is placed on the hot melt ring 3, and the compression ring 5 is set to embed into the softened hot melt ring 3. This not only improves the connection stability between the sealing ring 4 and the hot melt ring 3, but also squeezes the hot melt ring 3 to overflow evenly, preventing gaps between the hot melt ring 3 and the connecting ring 203, and achieving a tighter fit. The sealing ring 4 also fits with the hot melt ring 3, achieving the final seal. The outer diameter of the middle ring 202 is smaller than that of the receiving ring 201 to prevent the hot melt ring 3 from overflowing upwards after excessive melting. That is, a certain amount of space is provided between the middle ring 202 and the thermos bottle wall.
[0017] In this embodiment, the hot melt ring 3 is a food-grade silicone ring; the softening temperature of the hot melt ring 3 is 150℃~200℃, at which point the material begins to soften and its elasticity decreases, making it suitable for tightly bonding with other components through a hot melt process.
[0018] In this embodiment, the sealing plate and the extrusion ring 5 are food-grade 304 stainless steel rings. The melting point of 304 stainless steel is about 1450°C, which is much higher than the temperature when the hot-melt ring 3 is melted. It will not soften, deform or be damaged. It can stably maintain the flatness of the top plate and ensure uniform pressure on the molten sealing plate. In addition, the surface of the sealing plate is electrolytically polished to reduce surface roughness and reduce frictional resistance with the molten ring.
[0019] In this embodiment, the support connecting frame 2 is a food-grade polytetrafluoroethylene (PTFE) ring; the food-grade polytetrafluoroethylene (PTFE) has a working temperature of up to 260°C, completely covering the hot melt range of silicone, and has no deformation or melting risk when heated. It has a certain degree of flexibility and can form a tighter fit with the silicone hot melt ring 3, compensating for minor dimensional errors and improving the sealing effect.
[0020] 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 illustrative of the principles of this 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.
Claims
1. A vacuum layer sealing device for a thermos bottle, comprising a sealing ring (1), characterized in that: A support connecting frame (2) is provided above the sealing ring (1). The support connecting frame (2) includes a receiving ring (201) placed above the sealing ring (1). A middle ring (202) is fixed to the top of the receiving ring (201). The outer diameter of the middle ring (202) is smaller than the outer diameter of the receiving ring (201). A connecting ring (203) is fixed to the top of the middle ring (202). A hot melt ring (3) is provided above the support connecting frame (2). The outer diameter of the connecting ring (203) is smaller than the outer diameter of the hot melt ring (3). The hot melt ring (3) is placed on the connecting ring (203). A closing ring (4) is provided above the hot melt ring (3).
2. The vacuum layer sealing device for thermos according to claim 1, wherein: The bottom of the closed ring (4) is fixed with a compression ring (5); after the hot melt ring (3) is softened, the compression ring (5) can be embedded in the hot melt ring (3).
3. The vacuum layer sealing device for thermos according to claim 1, wherein: The hot melt ring (3) is a food-grade silicone ring.
4. The vacuum layer sealing device for thermos according to claim 2, wherein: The sealing plate and the extrusion ring (5) are food-grade 304 stainless steel rings, and the surface of the sealing plate is subjected to surface electrolytic polishing treatment.
5. The vacuum layer sealing device for thermos bottle according to claim 1, characterized in that: The support frame (2) is a food-grade polytetrafluoroethylene ring.