Anti-loose metal closed hole foaming rubber line composite sealing gasket

Abstract

The utility model provides an anti-loose metal closed hole foaming rubber line composite sealing gasket, and belongs to the technical field of sealing gaskets. Comprising a metal substrate, a bolt mounting hole is formed in the metal substrate, and a two-sided anti-loose helical tooth structure is arranged on the periphery of the bolt mounting hole; closed-cell foaming rubber sealing lines are arranged on the upper face and the lower face of the edge of the medium through hole cavity of the metal substrate, and the closed-cell foaming rubber sealing lines continuously extend to form closed sealing lines along the periphery of the medium through hole cavity at the distance of 1 mm or above from the inner edge of the medium through hole cavity. According to the structure, no foaming rubber layer is arranged below the bolt, and torque attenuation caused by rubber compression is avoided; compared with full-surface coating, the mode of locally compounding the foamed rubber is adopted, so that the glue consumption is greatly reduced, and the production cost is reduced; and the stamped metal leftover material does not contain rubber, can be directly recycled, does not need heating treatment, and avoids environmental pollution. A two-sided anti-loosening helical tooth structure is arranged on the peripheral edge of the bolt mounting hole, so that the bolt is effectively prevented from loosening.

Description

Technical Field

[0001] This utility model belongs to the field of sealing gasket technology, specifically relating to a non-loosening metal closed-cell foamed rubber composite sealing gasket. Background Technology

[0002] Existing metal-foamed rubber composite gaskets typically involve laminating foamed rubber onto the entire upper and lower surfaces of a metal gasket to form a composite sheet, which is then stamped into a gasket. This structure has the following problems:

[0003] 1. Because there is a foamed rubber layer under the bolt, the creep relaxation characteristics of the rubber will cause the bolt torque to decrease from the original 100 Newtons to about 70 Newtons, resulting in bolt loosening, gasket loosening, reduced sealing pressure, affecting the sealing effect, and even causing leakage.

[0004] 2. The metal sheet is entirely composite with foamed rubber on both sides, which requires a large amount of rubber and is therefore very expensive.

[0005] 3. It is difficult to recycle the scraps after stamping, and the rubber on both sides of the metal sheet is difficult to separate, requiring heat treatment. However, the heating process releases harmful gases and pollutes the environment.

[0006] Existing technologies employ a method of vulcanizing and bonding a rubber strip to the inner wall of a metal sheet. However, this method suffers from drawbacks such as a small bonding area between the rubber strip and the inner wall of the metal pad, high bonding difficulty, high cost, a high risk of rubber strip detachment, and susceptibility to cracking. Furthermore, it has weak sealing compensation capabilities for rough surfaces. Therefore, it is necessary to propose an improvement. Utility Model Content

[0007] The technical problem solved by this utility model is to provide a non-loosening metal closed-cell foamed rubber composite sealing gasket. The purpose of this utility model is to solve the problems of bolt torque attenuation, large amount of glue used, and difficulty in recycling scrap materials in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A non-loosening metal closed-cell foamed rubber composite sealing gasket includes a metal substrate, wherein the metal substrate is provided with bolt mounting holes and the bolt mounting holes are provided with two-sided non-loosening oblique tooth structures around them.

[0010] Closed-cell foamed rubber sealing lines are provided on both the upper and lower surfaces of the dielectric through-hole cavity edge of the metal substrate. The closed-cell foamed rubber sealing lines extend continuously along the periphery of the dielectric through-hole cavity and at a distance of more than 1 mm from its inner edge to form a closed sealing line.

[0011] Further defining the above solution, the closed-cell foamed rubber sealing line is fixed to the metal substrate by a vulcanization process; the width of the closed-cell foamed rubber sealing line is greater than 1.5 mm.

[0012] Further defining the above solution, the thickness of the closed-cell foamed rubber sealing line before vulcanization and foaming is less than 0.12 mm, and the apparent thickness of the sealing line after foaming is greater than 0.20 mm.

[0013] Further specifying the above scheme, the material of the metal substrate is aluminum alloy plate, stainless steel plate or cold-rolled carbon steel plate.

[0014] As a further limitation of the above scheme, the thickness of the metal substrate is greater than 0.20 mm.

[0015] Further defining the above scheme, the two-sided anti-loosening helical tooth structure presents a two-sided reverse helical tooth radial structure.

[0016] As a further limitation of the above scheme, the depth of the anti-loosening oblique teeth in the two-sided anti-loosening oblique tooth structure is no more than 25% of the thickness of the metal substrate.

[0017] Advantages of this utility model compared to the prior art:

[0018] This solution effectively prevents bolt torque attenuation: by replacing the previous method of completely bonding foamed rubber to the surface of the metal gasket with foamed rubber on both sides of the sealing edge of the medium through hole near the metal substrate, there is no foamed rubber layer under the bolt. At the same time, an anti-loosening metal helical tooth structure is set under the nut, which effectively avoids significant torque attenuation caused by rubber compression creep relaxation. The bolt torque attenuation is improved by more than 70%.

[0019] This solution considers the sealing principle and changes the surface seal to a line seal. Under the same conditions, the sealing performance is significantly improved. According to comparative tests, the nitrogen leakage rate is reduced by more than 20%.

[0020] 3. This solution saves material costs: The use of locally composite foamed rubber lines significantly reduces the amount of adhesive used compared to full-surface application, reducing adhesive usage by more than 80%, thus significantly lowering production costs; at the same time, it greatly reduces VOC emissions during the production process, resulting in a significant improvement in environmental performance.

[0021] 4. This solution is environmentally friendly and easy to recycle: The metal scraps after stamping do not contain rubber and can be directly recycled without heat treatment, thus avoiding environmental pollution; and significantly reducing the cost of scrap materials.

[0022] 5. This solution optimizes sealing performance: The reasonable design of the thickness and position of the closed-cell foamed rubber line ensures the sealing effect while avoiding the problem of insufficient relaxation of sealing stress caused by excessive rubber layer; due to the unique high compressibility of closed-cell foamed rubber (compression rate of over 40%), the problem of crushing of the sealing rubber line under high bolt tightening torque is effectively avoided.

[0023] 6. This solution optimizes and reduces the bolt tightening torque required for effective sealing of the gasket, which can reduce the bolt diameter, tightening torque, and increase the bolt distance, thereby mitigating the risk of flange deformation caused by excessive bolt torque.

[0024] 7. This solution enhances the anti-loosening effect: the anti-loosening friction texture around the bolt mounting hole significantly increases friction, effectively preventing the bolt from loosening;

[0025] 8. This solution is highly adaptable: it is suitable for composite gaskets of different shapes and metal gaskets of various materials. Appropriate materials and foam rubber thickness can be selected according to different working conditions. Attached Figure Description

[0026] Figure 1 This is an embodiment of a regularly shaped sealing gasket in this utility model;

[0027] Figure 2 This utility model Figure 1 Sectional view along line AA in the middle;

[0028] Figure 3 This utility model Figure 2 BB-direction sectional view in the middle;

[0029] Figure 4 This is an embodiment of an irregularly shaped sealing gasket in this utility model;

[0030] Figure 5 This utility model Figure 4 CC-direction section view;

[0031] Figure 6 This utility model Figure 4 DD section view in the middle; Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation 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.

[0034] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Please see Figure 1-6 The embodiments of this utility model are described in detail below.

[0036] Example: See Figure 1 and Figure 4 As shown: A non-loosening metal closed-cell foamed rubber composite sealing gasket includes a metal substrate 1, the metal substrate 1 is provided with bolt mounting holes 3, and the bolt mounting holes 3 are provided with two-sided non-loosening oblique tooth structures 4 around them.

[0037] See Figure 1-2 and Figure 4-5 As shown, closed-cell foamed rubber sealing lines 2 are provided on both the upper and lower surfaces of the dielectric through-hole cavity 6 of the metal substrate 1. The closed-cell foamed rubber sealing lines 2 extend continuously along the periphery of the dielectric through-hole cavity 6 at a distance of more than 1 mm from its inner edge to form a closed sealing line.

[0038] Preferably, the closed-cell foamed rubber sealing line 2 is fixed to the metal substrate 1 by a vulcanization process; the width of the closed-cell foamed rubber sealing line 2 is greater than 1.5 mm.

[0039] Preferably, the thickness of the closed-cell foamed rubber sealing line 2 before vulcanization and foaming is less than 0.12 mm, and the apparent thickness of the sealing line after foaming is greater than 0.20 mm.

[0040] Preferably, the metal substrate 1 is made of aluminum alloy plate, stainless steel plate or cold-rolled carbon steel plate.

[0041] Preferably, the thickness of the metal substrate 1 is greater than 0.20 mm.

[0042] See Figure 3 and Figure 6 As shown: The two-sided anti-loosening oblique tooth structure 4 presents a two-sided reverse oblique tooth radial structure.

[0043] Preferably, the depth of the anti-loosening oblique teeth in the two-sided anti-loosening oblique tooth structure 4 is no greater than 25% of the thickness of the metal substrate 1.

[0044] The working principle and effects of this utility model:

[0045] 1. Sealing function: The closed-cell foamed rubber sealing line 2 is located on both sides of the inner edge near the medium through hole cavity 6. When the bolt is tightened, the closed-cell foamed rubber sealing line 2 is deformed by pressure and fills the micro-unevenness of the sealing surface to achieve effective sealing.

[0046] 2. Anti-loosening function: The anti-loosening oblique tooth structure 4 on both sides around the bolt mounting hole 3 increases the friction between the bolt head and the washer, effectively preventing the bolt from loosening due to vibration and other reasons.

[0047] 3. Material saving: Foamed rubber is only applied to the inner edges that need to be sealed, which greatly reduces the amount of foamed rubber used and lowers costs.

[0048] 4. Environmentally friendly recycling: The metal substrate 1 is stamped before the adhesive is applied. The scraps do not contain foamed rubber and can be directly recycled without heat treatment, thus avoiding the generation of harmful gases.

[0049] In summary, this utility model solves the problems of bolt torque attenuation, large amount of glue used, and difficulty in recycling scrap materials in the prior art. It has a simple structure, is easy to manufacture and process, and has low manufacturing cost.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A latching metal closed cell foamed rubber cord composite gasket, characterized by: Includes a metal substrate (1), the metal substrate (1) is provided with bolt mounting holes (3), and the bolt mounting holes (3) are provided with two anti-loosening oblique tooth structures (4) around them; Closed-cell foamed rubber sealing lines (2) are provided on both the upper and lower surfaces of the medium through-hole cavity (6) of the metal substrate (1). The closed-cell foamed rubber sealing lines (2) extend continuously along the periphery of the medium through-hole cavity (6) at a distance (5) of more than 1 mm from its inner edge to form a closed sealing line.

2. The anti-looseness metal closed-cell foamed rubber cord composite gasket according to claim 1, characterized in that: The closed-cell foamed rubber sealing line (2) is fixed to the metal substrate (1) by a vulcanization process; the width of the closed-cell foamed rubber sealing line (2) is greater than 1.5 mm.

3. The anti-looseness metal closed cell foamed rubber cord composite gasket as claimed in claim 1, wherein: The thickness of the closed-cell foamed rubber sealing line (2) before vulcanization and foaming is less than 0.12 mm, and the apparent thickness of the sealing line after foaming is greater than 0.20 mm.

4. The anti-syllst metal closed cell foamed rubber cord composite gasket as claimed in claim 1 wherein: The metal substrate (1) is made of aluminum alloy plate, stainless steel plate or cold-rolled carbon steel plate.

5. The anti-syllst metal closed cell foamed rubber cord composite gasket as claimed in claim 1 wherein: The thickness of the metal substrate (1) is greater than 0.20 mm.

6. The anti-syllst metal closed cell foamed rubber cord composite gasket as claimed in claim 1 wherein: The two-sided anti-loosening oblique tooth structure (4) presents a two-sided reverse oblique tooth radial structure.

7. The anti-syllst metal closed cell foamed rubber cord composite gasket as claimed in claim 1 wherein: The depth of the anti-loosening oblique teeth of the two-sided anti-loosening oblique tooth structure (4) is no greater than 25% of the thickness of the metal substrate (1).

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