A sealing structure for a process hole

Abstract

The utility model relates to the field of sealing element, and specifically is a sealing structure for process hole, including sealing plug, the sealing plug includes plug body, be equipped with a plurality of sealing grooves on the plug body, form sealing protrusion between adjacent sealing groove, the same or dissimilar of adjacent sealing protrusion outside surface, the utility model discloses a plurality of sealing grooves'setting can form a plurality of sealing protrusions, and the subsequent use is convenient to form multistage sealing with process hole inner wall, better guarantee sealing effect, the utility model discloses the shape of the different of the sealing protrusion outside surface is required, can change the shape of sealing protrusion outside surface according to actual requirement, increase or reduce the sticking area with process hole inner wall, to guarantee the corresponding sealing effect, can also change the convenience of assembly according to need simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of sealing components, specifically a sealing structure for process holes. Background Technology

[0002] In existing mechanical manufacturing, automotive industry and hydraulic and pneumatic fields, process holes (such as casting sand removal holes, machining positioning holes, process through holes, inspection holes or weight reduction holes) generally need to be reliably sealed in the later stages of production or maintenance.

[0003] Traditional solutions mainly include the following:

[0004] 1. Single-layer rubber stopper, metal plug + sealant or metal plug + copper or aluminum washer, steel ball or copper ball, etc.;

[0005] These types of plugs rely solely on a single flange or ring to contact the hole wall or end face, resulting in a fixed sealing contact area that cannot adapt to changes in hole diameter and geometric tolerances.

[0006] Leakage is likely to occur if there are slight differences in taper, ellipticity, or surface roughness in the hole wall; at the same time, in order to ensure a seal, a large radial interference is often required, which leads to excessive pressing force, making manual assembly difficult and easily scratching the hole opening.

[0007] 2. Multi-stage sealing plug with equal cross-section

[0008] Some existing technologies use continuous sealing rings with equal height and cross-sectional shape. Although this increases the number of sealing channels, the stress and deformation of each ring are consistent, making it impossible to form a gradient function of "first guiding - then pre-pressurizing - finally high-pressure sealing".

[0009] For example, patent CN209083996U discloses the structure of a plug with high sealing performance.

[0010] Based on the above, the existing plug structure has the following main defects:

[0011] The end of the plug lacks a dedicated guide: the end face of the plug is a right angle or a simple chamfer, which makes it easy to become eccentric during press-fitting, resulting in local stress concentration and chipping of the hole edge.

[0012] No gradient in groove spacing / protrusion height: The spacing between adjacent sealing rings and the protrusion height are consistent, making it impossible to optimize the zone according to the hole diameter tolerance, surface roughness, or sealing medium pressure, resulting in some areas being too large for interference and some areas being insufficient for sealing.

[0013] Traditional plugs require a relatively large initial insertion force, which is not conducive to the installation and assembly of density plugs.

[0014] Therefore, in order to improve or solve at least one of the above technical problems, it is necessary to optimize the design of the existing sealing plug structure. Utility Model Content

[0015] The purpose of this invention is to provide a sealing structure that can reduce the difficulty of initial assembly of the sealing plug in the process hole.

[0016] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0017] A sealing structure for a process hole includes a sealing plug; the sealing plug includes a plug body, and the plug body is provided with a plurality of sealing grooves.

[0018] A sealing protrusion is formed between adjacent sealing grooves; the outer surfaces of adjacent sealing protrusions may be the same or different.

[0019] At least one sealing protrusion has an arc-shaped outer surface.

[0020] The horizontal cross-sectional area of ​​one end of the sealing plug is larger than the horizontal cross-sectional area of ​​the other end; the sealing plug is frustoconical in shape.

[0021] The arc-shaped sealing protrusion on the outer side is located at the end of the sealing plug with a smaller horizontal cross-sectional area.

[0022] The end of the plug body is provided with a guide arc surface.

[0023] The plug body has an inner cavity; the inner cavity extends from the end of the sealing plug with a larger horizontal cross-sectional area to the end of the sealing plug with a smaller horizontal cross-sectional area; the depth of the inner cavity is less than the axial length of the plug body.

[0024] The interval between adjacent sealing grooves at the end of the sealing plug with the larger horizontal cross-section is not less than the interval between adjacent sealing grooves at the end of the sealing plug with the smaller horizontal cross-section.

[0025] The advantages of this utility model are:

[0026] This utility model discloses a sealing structure for process holes.

[0027] This invention, through the setting of multiple sealing grooves, can form multiple sealing protrusions, which facilitates the formation of multi-level seals with the inner wall of the process hole during subsequent use, thereby better ensuring the sealing effect.

[0028] This utility model allows for variations in the shape of the outer surface of the sealing protrusion. The shape of the outer surface of the sealing protrusion can be changed according to actual requirements, increasing or decreasing the contact area with the inner wall of the process hole, thereby ensuring the corresponding sealing effect. At the same time, the ease of assembly can be changed as needed. Attached Figure Description

[0029] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0030] Figure 1This is a schematic diagram of the structure of this utility model.

[0031] The markings in the above figures are all:

[0032] 1. Sealing plug, 2. Inner cavity, 3. Plug body, 4. Sealing groove, 5. Sealing protrusion, 6. Guide arc surface. Detailed Implementation

[0033] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0034] A sealing structure for a process hole includes a sealing plug 1; the sealing plug 1 includes a plug body 3, and the plug body 3 is provided with a plurality of sealing grooves 4; a sealing protrusion 5 is formed between adjacent sealing grooves 4; the outer surfaces of adjacent sealing protrusions 5 are the same or different; the present invention, by setting multiple sealing grooves 4, can form multiple sealing protrusions 5, which facilitates the formation of multi-level seals with the inner wall of the process hole during subsequent use, and better ensures the sealing effect.

[0035] This utility model allows for variations in the shape of the outer surface of the sealing protrusion 5. The shape of the outer surface of the sealing protrusion 5 can be changed according to actual requirements, increasing or decreasing the contact area with the inner wall of the process hole, thereby ensuring the corresponding sealing effect. At the same time, the ease of assembly can be changed as needed.

[0036] In this utility model, the sealing plug 1 is the main structure of the sealing structure. The sealing plug 1 includes a plug body 3, which is the main structure of the sealing plug 1. Generally, the sealing plug 1 is made of metal material, such as aluminum, steel or stainless steel.

[0037] The sealing groove 4 is generally an annular groove structure, mainly distributed on the outer surface of the plug body 3. Adjacent sealing grooves 4 are generally spaced apart, thus forming the sealing protrusion 5 disclosed above in this utility model. The sealing protrusion 5 is part of the plug body 3. Multiple sealing protrusions 5 form a tooth structure. When the sealing plug 1 deforms later, the edge of the sealing protrusion 5 can be embedded in the inner wall of the process hole, which better ensures the sealing effect of the sealing plug 1 in the process hole, and at the same time ensures the stability of the sealing plug 1 in the process hole, preventing it from loosening and falling off.

[0038] In this utility model, the outer surfaces of adjacent sealing protrusions 5 may be the same or different. This design mainly increases the applicability of this utility model. The outer surfaces of adjacent sealing protrusions 5 can be the same. The same design can facilitate the processing of the sealing groove 4 and the overall processing of the sealing plug 1. The different design means that the outer surfaces of adjacent sealing protrusions 5 are required to be different. The different outer surfaces of the sealing protrusions 5 can facilitate the installation and assembly of the sealing protrusions 5 in the process hole.

[0039] In this utility model, the outer surfaces of adjacent sealing protrusions 5 may be the same or different; this mainly reflects the differentiated shape of the outer surfaces of adjacent sealing protrusions 5. In actual design, the sealing protrusion 5 can be an arc-shaped protrusion (small radius of curvature): reducing the contact area between the sealing protrusion 5 and the inner wall of the process hole, and facilitating the assembly of the sealing plug 1 in the process hole.

[0040] The sealing protrusion 5 can also be a trapezoidal protrusion (with a large bevel angle on the outer side): it can be used in conjunction with the inner wall of the process hole to reduce frictional resistance.

[0041] The sealing protrusion 5 can also be a serrated protrusion (micro-serrated structure): used for rough hole walls, embedded in surface pits to enhance sealing.

[0042] In addition, in this utility model, the outer surface areas of adjacent sealing protrusions 5 are different, and the protrusion heights of adjacent sealing protrusions 5 are gradually varied. This design can balance assembly force and sealing performance.

[0043] In this utility model, the height of the sealing protrusion 5 at the end with a smaller horizontal cross-sectional area of ​​the sealing plug 1 is less than the height of the sealing protrusion 5 at the end with a larger horizontal cross-sectional area; the sealing protrusion 5 with a lower height acts as a guide seal, which facilitates the pressing of the sealing plug 1 into the process hole.

[0044] The high-profile sealing protrusion 5 acts as the main seal, ensuring the actual sealing effect.

[0045] Furthermore, in this invention, at least one sealing protrusion 5 has an arc-shaped outer surface. This design reduces the contact area between the sealing protrusion 5 and the inner wall of the process hole, facilitating the pressing of the sealing plug 1 into the process hole. It also reduces the initial insertion force and prevents scratching at the process hole opening.

[0046] Furthermore, in this utility model, the horizontal cross-sectional area of ​​one end of the sealing plug 1 is larger than the horizontal cross-sectional area of ​​the other end; the sealing plug 1 is frustoconical; the cross-sectional area of ​​one end (large end) is larger than that of the other end (small end), forming a self-locking conical surface to adapt to different hole diameter tolerances.

[0047] Furthermore, in this invention, the arc-shaped sealing protrusion 5 on the outer surface is located at the end with the smaller horizontal cross-sectional area of ​​the sealing plug 1; the arc-shaped protrusion achieves pre-sealing through elastic deformation in the initial stage of insertion, while automatically correcting the hole axis offset by utilizing the radius of curvature of the arc surface; the arc-shaped protrusion preferentially contacts the hole wall to form an initial sealing cavity, and as the plug goes deeper, the subsequent protrusions are gradually compressed to achieve the establishment of staged sealing pressure; thus better ensuring the sealing effect.

[0048] Furthermore, in this utility model, the end of the plug body 3 is provided with a guide arc surface 6; in this utility model, the guide arc surface 6 essentially reduces the existence of the edge of the end of the plug body 3, one is to reduce the concentration of subsequent deformation stress, and another function is to play a good insertion guide role, which facilitates the insertion and positioning of the sealing plug 1 in the process hole, and facilitates the subsequent pressing of the density plug.

[0049] Furthermore, in this utility model, the plug body 3 is provided with an inner cavity 2; the inner cavity 2 extends from the end of the sealing plug 1 with a larger horizontal cross-sectional area to the end of the sealing plug 1 with a smaller horizontal cross-sectional area; the depth of the inner cavity 2 is less than the axial length of the plug body 3; the shape of the inner cavity 2 is a blind hole extending from the large end to the small end of the sealing plug 1, and the depth is less than the axial length of the plug; this arrangement makes the small end of the sealing plug 1 equivalent to retaining a solid section; this solid section can enhance the rigidity of the small end; and facilitate the subsequent press-fitting support of the density plug.

[0050] Meanwhile, the inner cavity 2 disclosed in this utility model can provide radial elastic deformation space, which makes it easier to press and assemble the density plug in the process hole.

[0051] At the same time, the inner cavity 2 can reduce the amount of material used and lower costs.

[0052] Furthermore, in this invention, the spacing between adjacent sealing grooves 4 at the larger horizontal cross-section end of the sealing plug 1 is not less than the spacing between adjacent sealing grooves 4 at the smaller horizontal cross-section end of the sealing plug 1. The smaller the spacing between adjacent sealing grooves 4, the smaller the area of ​​the outer surface of the sealing protrusion 5 will theoretically be. The small end of this invention mainly serves as a pre-seal and installation guide, so the area of ​​the outer surface of the sealing protrusion 5 at the small end of the sealing plug 1 can theoretically be reduced. However, in order to ensure the sealing effect, the sealing plug 1 and the process hole need to have sufficient sealing contact area. Therefore, in this invention, the spacing between adjacent sealing grooves 4 at the large end of the sealing plug 1 is required to ensure the sealing contact area between the sealing plug 1 and the process hole.

[0053] Based on the above, it can be understood that the large spacing of the sealing groove 4 at the large end of the important sealing plug 1 of this utility model is to ensure the contact area between the sealing plug 1 and the inner wall of the process hole, while the small spacing at the small end is to facilitate the installation and assembly of the sealing plug 1 in the process hole.

[0054] Example 1:

[0055] like Figure 1 As shown:

[0056] The sealing structure mainly includes a sealing plug 1, which is an aluminum frustum-shaped structure.

[0057] The sealing plug 1 includes a plug body 3, and the plug body 3 is provided with an inner cavity 2. The inner cavity 2 extends from the large end to the small end of the plug body 3. The inner cavity 2 is coaxially arranged with the plug body 3. The inner cavity 2 is a groove design on the plug body 3.

[0058] The plug body 3 has an overall frustum-shaped design.

[0059] Four annular sealing grooves 4 are provided on the plug body 3.

[0060] A guide arc surface 6 is provided at the end of the plug body 3 away from the opening of the inner cavity 2.

[0061] The sealing protrusion 5 formed between the two density grooves near the small end of the plug body 3 has an arc-shaped outer surface.

[0062] Pressing process:

[0063] Guiding stage: The guide arc surface 6 contacts the process hole, and under the action of external force, the sealing plug 1 is initially inserted into the process hole.

[0064] Multi-stage compression: continue to apply external force to the density plug; achieve the entire sealing plug 1 being pressed into the process hole; through the deformation of the sealing plug 1, an interference fit is formed with the inner wall of the process hole; and the edge of the sealing protrusion 5 formed by the sealing groove 4 is forced into the surrounding workpiece material, thereby forming an effective high-pressure leak-free seal.

[0065] Obviously, the specific implementation of this utility model is not limited to the above-mentioned methods. Any non-substantial improvements made using the inventive concept and technical solution of this utility model are within the protection scope of this utility model.

Claims

1. A sealing structure for a process hole, characterized in that, Includes a sealing plug; the sealing plug includes a plug body, and the plug body is provided with multiple sealing grooves; A sealing protrusion is formed between adjacent sealing grooves; the outer surfaces of adjacent sealing protrusions may be the same or different.

2. The sealing structure for a process hole according to claim 1, characterized in that, At least one sealing protrusion has an arc-shaped outer surface.

3. The sealing structure for a process hole according to claim 2, characterized in that, The horizontal cross-sectional area of ​​one end of the sealing plug is larger than the horizontal cross-sectional area of ​​the other end; the sealing plug is frustoconical in shape.

4. The sealing structure for a process hole according to claim 3, characterized in that, The arc-shaped sealing protrusion on the outer side is located at the end of the sealing plug with a smaller horizontal cross-sectional area.

5. A sealing structure for a process hole according to claim 1, characterized in that, The end of the plug body is provided with a guide arc surface.

6. A sealing structure for a process hole according to claim 3, characterized in that, The plug body has an inner cavity; the inner cavity extends from the end of the sealing plug with a larger horizontal cross-sectional area to the end of the sealing plug with a smaller horizontal cross-sectional area; the depth of the inner cavity is less than the axial length of the plug body.

7. A sealing structure for a process hole according to claim 3, characterized in that, The interval between adjacent sealing grooves at the end of the sealing plug with the larger horizontal cross-section is not less than the interval between adjacent sealing grooves at the end of the sealing plug with the smaller horizontal cross-section.

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