Connection sealing structure

Abstract

The utility model discloses a connection sealing structure. The connection sealing structure comprises a container, an annular sealing ring and an end cover, an annular groove is formed in the upper end of the container and surrounds an upper port of the container; the annular sealing ring is arranged in the annular groove; the end cover is located above the container, the outer side of the end cover extends downwards to form a plurality of tooth parts, and the tooth parts are distributed in the circumferential direction of the end cover; when the end cover downwards plugs the upper end opening of the container, the lower end face of the end cover abuts against and tightly presses the annular sealing ring, and the tooth part is tightly pressed and attached to the peripheral wall of the container so that the end cover and the container can be fixed to each other. The multiple tooth parts can enhance the connection stability of the container and the end cover, and when a few tooth parts are loosened, the container and the end cover can still keep relatively fixed; due to the fact that the annular sealing ring is in a compressed state, when a gap is generated between the container and the end cover due to loosening of the tooth part, the annular sealing ring is expanded to achieve dynamic sealing, the stability of connection between the container and the end cover is guaranteed, and relative vibration is not prone to occurring.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, and in particular to a connection sealing structure. Background Technology

[0002] When installing end caps on container ports, a tight seal must be ensured. This is typically achieved by using mechanical preload to ensure a tight fit between the sealing surfaces, forming a static seal. However, under long-term operating conditions, pressure fluctuations within the sealing cavity can easily cause deformation of the contact surfaces, leading to seal failure. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a connecting and sealing structure.

[0004] This utility model embodiment provides a connection sealing structure, the connection sealing structure comprising:

[0005] A container, wherein the upper end of the container is provided with an annular groove, the annular groove surrounding the upper port of the container;

[0006] An annular sealing ring is disposed in the annular groove;

[0007] An end cap, located above the container, has multiple teeth extending downward from its outer side, the teeth being distributed circumferentially along the end cap.

[0008] When the end cap is used to seal the upper port of the container downwards, the lower end face of the end cap abuts against and presses against the annular sealing ring, and the teeth press against the outer peripheral wall of the container so that the end cap and the container are fixed to each other.

[0009] According to some embodiments of the present invention, the outer side of the end cap extends downward to form a first annular plate, the lower end face of the first annular plate is provided with a plurality of teeth, and the side of the first annular plate near the axis of the end cap is attached to the outer peripheral wall of the container.

[0010] According to some embodiments of the present invention, the annular groove extends through the outer peripheral wall of the container in a direction away from the container axis, and the side of the first annular plate close to the container axis is attached to and presses against the outer peripheral wall of the annular sealing ring.

[0011] According to some embodiments of the present invention, when the lower end face of the end cap is attached to the upper end face of the container, the upper end face of the annular sealing ring is pressed into the annular groove by the end cap, and the annular sealing ring applies an upward force to the end cap.

[0012] According to some embodiments of the present invention, the upper end of the end cap is recessed downwards, causing the lower end of the end cap to bulge downwards to form a first groove. The groove wall of the first groove forms a second annular plate, and the side of the second annular plate away from the axis of the end cap is attached to the inner peripheral wall of the container.

[0013] According to some embodiments of the present invention, the annular groove extends through the inner peripheral wall of the container in a direction close to the axis of the container, and the side of the second annular plate away from the axis of the container is attached to and presses against the inner peripheral wall of the annular sealing ring.

[0014] According to some embodiments of the present invention, the outer peripheral wall of the container has a first wall and a second wall, the lower end of the first wall is connected to the upper end of the second wall, the first wall extends in a vertical direction, the second wall is inclined from top to bottom toward the axis of the container, and the teeth are close to the second wall.

[0015] According to some embodiments of the present invention, the side of the first annular plate closest to the axis of the end cap is attached to the first wall.

[0016] According to some embodiments of the present invention, the annular sealing ring is compressed and continuously applies force to the first annular plate.

[0017] According to some embodiments of the present invention, the annular sealing ring is compressed and continuously applies force to the second annular plate.

[0018] The connection sealing structure according to the embodiment of this utility model has at least the following technical effects:

[0019] 1. When the end cap is used to seal the upper port of the container, the annular sealing ring is pressed tightly, and the teeth are pressed against the outer peripheral wall of the container to fix the end cap to the container. Multiple teeth can enhance the connection stability between the container and the end cap. Even if a few teeth are loose, the container and the end cap can still remain relatively fixed.

[0020] 2. Since the annular sealing ring is in a compressed state, when the teeth loosen and a gap is created between the container and the end cap, the annular sealing ring expands to achieve dynamic sealing, ensuring the connection stability between the container and the end cap and preventing relative vibration.

[0021] 3. The annular groove and the annular sealing ring work together to form a double sealing interface. The partially exposed annular sealing ring is designed to dynamically compensate for deformation, giving the structure the ability to compensate for axial displacement. The circumferentially distributed teeth form discrete mechanical support, reducing the material stress concentration factor compared to traditional continuous flange structures. The preload and riveting force form orthogonal mechanical constraints, ensuring that the connection structure maintains a high initial fastening force under vibration conditions, improving process compatibility.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the connection and sealing structure of some embodiments of the present invention;

[0025] Figure 2 This is an exploded view of the connection and sealing structure of some embodiments of this utility model;

[0026] Figure 3 This is an exploded view of the connection and sealing structure of some embodiments of this utility model;

[0027] Figure 4 This is a cross-sectional view of a portion of the connecting and sealing structure according to some embodiments of the present invention;

[0028] Figure 5 This is a cross-sectional view of a portion of the connecting and sealing structure according to some embodiments of the present invention;

[0029] Figure 6 This is a cross-sectional view of a portion of the connection and sealing structure according to some embodiments of the present invention.

[0030] Icon labels:

[0031] Container 100; Annular groove 110; Upper port 120; Annular sealing ring 130; First wall 141; Second wall 142;

[0032] End cap 200; toothed portion 210; first annular plate 220; first groove 230; second annular plate 240. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0038] According to some embodiments of this utility model, refer to Figures 1 to 6 The sealing structure includes a container 100, an annular sealing ring 130, and an end cap 200. The container 100, annular sealing ring 130, and end cap 200 are all coaxially arranged in the vertical direction. The upper end of the container 100 is recessed downwards to form an annular groove 110, which surrounds the upper port 120 of the container 100. The annular sealing ring 130 is annular and located within the annular groove 110, with a portion of the annular sealing ring 130 located outside the annular groove 110. When the end cap 200 seals the container 100, it can compress the annular sealing ring 130 and press it into the annular groove 110. The end cap 200 is located above the container 100, and its outer side extends downwards to form multiple teeth 210, which are spaced apart and circumferentially distributed along the end cap 200. When the end cap 200 abuts against the upper end face of the container 100 and seals the upper port 120 of the container 100, the lower end face of the end cap 200 abuts against and presses against the annular sealing ring 130, so that the annular sealing ring 130 is pressed into the annular groove 110. At this time, the annular sealing ring 130 has an upward preload force on the end cap 200. The teeth 210 are pressed and adhered to the outer peripheral wall of the container 100 by riveting, so that the end cap 200 and the container 100 are fixed to each other.

[0039] Understandably, when the end cap 200 is sealing the upper port 120 of the container 100, it presses the annular sealing ring 130, and the teeth 210 press against the outer peripheral wall of the container 100 to fix the end cap 200 to the container 100. The multiple teeth 210 can enhance the connection stability between the container 100 and the end cap 200. Even when a few teeth 210 loosen, the container 100 and the end cap 200 can still remain relatively fixed.

[0040] It should be noted that the end cap 200 can be customized, and its function is not limited to sealing or connection, but can also integrate and install components.

[0041] Furthermore, the coaxial structure design ensures uniform distribution of sealing force, eliminating the risk of localized leakage caused by off-center loading. The engagement of the annular groove 110 and the annular sealing ring 130 forms a double sealing interface. The partially exposed annular sealing ring 130 is designed to dynamically compensate for deformation, enabling the structure to compensate for axial displacement. The circumferentially distributed teeth 210 form discrete mechanical supports, reducing the material stress concentration factor compared to traditional continuous flange structures. The preload and riveting force form orthogonal mechanical constraints, ensuring the connection structure maintains a high initial fastening force under vibration conditions, improving process compatibility. The redundant design of the multiple teeth 210 gives the connection structure fault tolerance, maintaining high overall connection strength even if a single tooth 210 fails. The fluid channels formed between the teeth 210 reduce riveting thermal stress, thereby improving fatigue life under thermal cycling conditions.

[0042] Reference Figure 4 When the lower end face of the end cap 200 is abutted against the upper end face of the container 100, the upper end face of the annular sealing ring 130 is pressed into the annular groove 110 by the end cap 200, and the annular sealing ring 130 applies an upward force to the end cap 200. Since the annular sealing ring 130 is in a compressed state, when the teeth 210 loosen, causing a gap to form between the container 100 and the end cap 200, the annular sealing ring 130 rises upward to achieve a dynamic seal, ensuring the connection stability between the container 100 and the end cap 200 and preventing relative vibration. The elastic energy storage design of the annular sealing ring 130 achieves a self-compensating seal, maintaining an effective seal, with the expansion force and residual preload forming a dynamic balance.

[0043] Preferably, to further improve the reliability and adaptability of the connection sealing structure, the annular sealing ring 130 can be made of elastic materials such as EPDM rubber, fluororubber, or silicone rubber, with a preferred hardness range of Shore A 50-80 degrees and a compression set of no more than 20%. The cross-sectional shape of the annular sealing ring 130 can be trapezoidal, rectangular, or X-shaped. The X-shaped cross-section can deform in four directions under pressure, which is more conducive to filling the lateral gaps of the annular groove 110. Moreover, when a dual-hardness composite structure is adopted, the inner layer of the annular sealing ring 130 can be provided with a support skeleton with higher hardness, and the outer layer can be covered with a low-hardness sealing layer, which can ensure the positioning accuracy during assembly and improve the sealing performance of the contact surface.

[0044] According to some embodiments of this utility model, refer to Figures 2 to 6 The outer side of the end cap 200 extends downward to form a first annular plate 220. The lower end face of the first annular plate 220 is provided with multiple teeth 210. The side of the first annular plate 220 near the axis of the end cap 200 is attached to the outer peripheral wall of the container 100, thereby enhancing the sealing between the end cap 200 and the container 100. The first annular plate 220 forms a radial sealing barrier, which, together with the axial seal, forms an orthogonal sealing system, increasing the length of the medium leakage path.

[0045] Preferred, refer to Figure 5 The annular groove 110 extends through the outer peripheral wall of the container 100 in a direction away from the axis of the container 100, meaning that the side of the annular groove 110 away from the axis of the container 100 is open. The side of the first annular plate 220 closest to the axis of the container 100 adheres to and presses against the outer peripheral wall of the annular sealing ring 130. The annular sealing ring 130 is compressed and continuously applies force to the first annular plate 220. When the first annular plate 220 is pried open by external force or expands due to heat, the annular sealing ring 130 expands towards the first annular plate 220, thus continuing to adhere tightly to the first annular plate 220, thereby ensuring a tight seal.

[0046] According to some embodiments of this utility model, refer to Figure 6 The upper end of the end cap 200 is recessed downwards, causing the lower end of the end cap 200 to bulge downwards, forming a first groove 230. The groove wall of the first groove 230 forms a second annular plate 240. The side of the second annular plate 240 away from the axis of the end cap 200 is attached to the inner peripheral wall of the container 100, thereby enhancing the sealing between the end cap 200 and the container 100. The second annular plate 240 forms an inward sealing interface, which, together with the first annular plate 220, constitutes a double labyrinth sealing structure, improving the sealing performance.

[0047] Preferred, refer to Figure 6The annular groove 110 extends through the inner circumferential wall of the container 100, with the side of the annular groove 110 closest to the axis of the container 100 being open. The side of the second annular plate 240 away from the axis of the container 100 adheres to and presses against the inner circumferential wall of the annular sealing ring 130. The annular sealing ring 130 is compressed and continuously applies force to the second annular plate 240. When the second annular plate 240 is subjected to external force and moves away from the inner circumferential wall of the container 100, the annular sealing ring 130 expands towards the second annular plate 240, thus continuing to adhere tightly to the second annular plate 240, thereby ensuring a tight seal.

[0048] According to some embodiments of this utility model, refer to Figures 4 to 6 The outer peripheral wall of container 100 has a first wall 141 and a second wall 142. The lower end of the first wall 141 is connected to the upper end of the second wall 142. The first wall 141 extends vertically, and the second wall 142 is inclined from top to bottom towards the axis of container 100. The toothed portion 210 is pressed tightly against the second wall 142. The side of the first annular plate 220 near the axis of end cap 200 is attached to the first wall 141. Due to the inclination of the second wall 142, after the toothed portion 210 is pressed tightly against the second wall 142, the second wall 142 can prevent the toothed portion 210 from moving upward, thereby ensuring the connection stability between end cap 200 and container 100. The inclined second wall 142 forms a mechanical self-locking angle, which increases the pull-out resistance of the toothed portion 210. The planar fit between the first wall 141 and the first annular plate 220 achieves initial positioning.

[0049] Furthermore, a viscoelastic damping layer is provided between the contact surfaces of the annular sealing ring 130 and the annular groove 110. The material is butyl rubber or polyurethane, and the thickness is 0.1-0.3 mm. The loss factor of the damping layer should be in the range of 0.3-0.7, which can attenuate the amplitude by more than 60% under broadband vibration conditions. At the same time, a solid lubricating film containing molybdenum disulfide is coated on the contact interface between the tooth 210 and the second wall 142. The film thickness is 5-10 μm, which can reduce the fretting wear rate and extend the service life.

[0050] In this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A connection sealing structure, characterized in that, include: A container (100) having an annular groove (110) at its upper end, the annular groove (110) surrounding the upper port (120) of the container (100); An annular sealing ring (130) is disposed in the annular groove (110); An end cap (200) is located above the container (100), and the outer side of the end cap (200) extends downward to form a plurality of teeth (210), which are distributed circumferentially along the end cap (200); When the end cap (200) blocks the upper port (120) of the container (100) downwards, the lower end face of the end cap (200) abuts against and presses against the annular sealing ring (130), and the teeth (210) press against the outer peripheral wall of the container (100) so that the end cap (200) and the container (100) are fixed to each other.

2. The connection sealing structure according to claim 1, characterized in that, The outer side of the end cap (200) extends downward to form a first annular plate (220), and the lower end face of the first annular plate (220) is provided with a plurality of teeth (210). The side of the first annular plate (220) near the axis of the end cap (200) is attached to the outer peripheral wall of the container (100).

3. The connection sealing structure according to claim 2, characterized in that, The annular groove (110) extends through the outer peripheral wall of the container (100) in a direction away from the axis of the container (100), and the first annular plate (220) is attached to and presses against the outer peripheral wall of the annular sealing ring (130) on the side near the axis of the container (100).

4. The connection sealing structure according to claim 1, characterized in that, When the lower end face of the end cap (200) is attached to the upper end face of the container (100), the upper end face of the annular sealing ring (130) is pressed into the annular groove (110) by the end cap (200), and the annular sealing ring (130) applies an upward force to the end cap (200).

5. The connection sealing structure according to claim 2, characterized in that, The upper end of the end cap (200) is recessed downwards, causing the lower end of the end cap (200) to bulge downwards to form a first groove (230). The groove wall of the first groove (230) forms a second annular plate (240). The side of the second annular plate (240) away from the axis of the end cap (200) is attached to the inner peripheral wall of the container (100).

6. The connection sealing structure according to claim 5, characterized in that, The annular groove (110) extends through the inner peripheral wall of the container (100) in a direction close to the axis of the container (100), and the second annular plate (240) is attached to and presses against the inner peripheral wall of the annular sealing ring (130) on the side away from the axis of the container (100).

7. The connection sealing structure according to claim 2, characterized in that, The outer peripheral wall of the container (100) has a first wall (141) and a second wall (142), the lower end of the first wall (141) is connected to the upper end of the second wall (142), the first wall (141) extends in a vertical direction, and the second wall (142) is inclined from top to bottom toward the axis of the container (100), and the tooth (210) is close to the second wall (142).

8. The connection sealing structure according to claim 7, characterized in that, The first annular plate (220) is attached to the first wall (141) on the side near the axis of the end cap (200).

9. The connection sealing structure according to claim 3, characterized in that, The annular sealing ring (130) is compressed and continuously applies force to the first annular plate (220).

10. The connection sealing structure according to claim 6, characterized in that, The annular sealing ring (130) is compressed and continuously exerts force on the second annular plate (240).

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