Quickly mounted rubber and plastic composite flat gasket seal ring

Abstract

The utility model relates to a kind of fast installation type rubber and plastic composite flat gasket, belong to gasket technical field, it includes plastic ring and rubber ring, both are annular sheet, wherein plastic ring is sleeved on the periphery of rubber ring, and the inner ring of plastic ring is connected on the outer side wall of rubber ring.The utility model is better in compression resistance, more uniform in pressure distribution after compression, lower in high-pressure deformation probability, longer in service life, more safe and environmentally friendly, lower in deviation and misplacement rate during installation, more convenient and fast in disassembly and assembly.

Description

Technical Field

[0001] This utility model belongs to the field of sealing ring technology, and in particular relates to a quick-installing, misalignment-proof, pressure-resistant rubber-plastic composite flat gasket sealing ring for static sealing of pipe flanges or mechanical equipment end caps. Background Technology

[0002] Flat gaskets (or simply flat gaskets) are common sealing elements, typically made of materials such as rubber, plastic, or metal. They are widely used in machinery, automotive, electronics, and construction industries, primarily serving functions such as sealing, shock absorption, and cushioning. Traditional flat gaskets have several drawbacks. For example, they are prone to misalignment or displacement during installation; secondly, rigid flat gaskets are easily deformed under pressure, leading to uneven contact on the sealing surface. Both of these issues can easily cause seal failure. Furthermore, traditional flat gaskets lack a positioning structure, making installation and disassembly difficult and causing significant inconvenience for maintenance and replacement. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-installing, misalignment-proof, and pressure-resistant rubber-plastic composite flat gasket sealing ring to solve the technical problems of traditional flat gasket sealing rings being inconvenient to install and disassemble, prone to misalignment, and easily deformed under pressure.

[0004] To achieve the above objectives, the specific technical solution of this utility model is as follows: A quick-installing rubber-plastic composite flat gasket sealing ring includes a plastic ring and a rubber ring, both of which are annular sheets. The plastic ring is fitted around the outer edge of the rubber ring, and the inner ring of the plastic ring is connected to the outer wall of the rubber ring.

[0005] Furthermore, the outer wall of the rubber ring is provided with a concentric annular groove in the middle, which corresponds to the plastic ring, and the inner ring of the plastic ring is fixed in the annular groove.

[0006] Furthermore, the rubber ring and the plastic ring are bonded together with adhesive.

[0007] Furthermore, the outer sidewall of the plastic ring is provided with a recessed limiting groove that extends from its upper surface to its lower surface, and multiple limiting grooves are evenly distributed on the sidewall of the plastic ring around the center of the plastic ring.

[0008] Furthermore, one side wall of the plastic ring extends outward along the front and rear sides to form an outwardly protruding tab, and the outwardly protruding tab and the limiting groove are staggered on the outer ring of the plastic ring.

[0009] Furthermore, the plastic ring is made of glass fiber-filled modified polytetrafluoroethylene, and the rubber ring is made of fluororubber.

[0010] This utility model of a quick-installing rubber-plastic composite flat gasket seal ring combines a hard plastic ring and a soft rubber ring, resulting in better pressure resistance, more uniform pressure distribution under pressure, a lower probability of deformation under high pressure, longer service life, greater safety and environmental friendliness, lower misalignment and displacement rates during installation, and easier and faster disassembly and assembly. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the structure of this utility model; Figure 3 This is a cross-sectional view of the present invention; The markings in the diagram are as follows: 1. Plastic ring; 11. Limiting groove; 12. Outer protrusion; 2. Rubber ring; 21. Ring groove. Detailed Implementation

[0012] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a quick-installing rubber-plastic composite flat gasket sealing ring.

[0013] like Figure 1-3 As shown, the quick-installing rubber-plastic composite flat gasket sealing ring of this utility model includes a plastic ring 1 and a rubber ring 2, both of which are annular. The plastic ring 1 is fitted around the rubber ring 2, and the inner ring of the plastic ring 1 is fixed to the outer wall of the rubber ring 2. In use, the plastic ring 1 provides a certain support force to the inner rubber ring 2, and a gradient hardness is formed between them, where the hardness of the contact surface is higher than that of the transition layer. The plastic ring 1 and the rubber ring 2 cooperate with each other, which improves the pressure bearing capacity of the sealing ring and reduces the probability of tearing caused by local overpressure.

[0014] The rubber ring 2 is an annular sheet with a hollow inner ring. The middle of the outer ring sidewall is provided with an annular groove 21 concentric with it. The width of the annular groove 21 corresponds to the thickness of the plastic ring 1. The radial dimension of the inner ring of the annular groove 21 corresponds to the radial dimension of the inner ring of the plastic ring 1. The inner ring of the plastic ring 1 is fixed in the annular groove 21, so that the rubber ring 2 and the plastic ring 1 are correspondingly engaged together through the annular groove 21.

[0015] Furthermore, the rubber ring 2 and the plastic ring 1 are bonded together with glue. In this embodiment, fluorosilicone adhesive is coated on the surface of the inner ring of the plastic ring 1 and the corresponding snap-fit ​​part of the ring groove 21, so that it is bonded to the ring groove 21, making the connection between the two tighter and stronger.

[0016] The plastic ring 1 is an annular sheet with a hollow inner ring. Its outer side wall has a recessed limiting groove 11 that extends from the upper surface to the lower surface of the plastic ring 1. In this embodiment, the cross-section of the limiting groove 11 is set as a semi-circle with the center located on the outer ring of the plastic ring 1. Multiple limiting grooves 11 are evenly distributed on the side wall of the plastic ring 1 around the center of the plastic ring 1. In this embodiment, four limiting grooves 11 are evenly distributed around the outer ring of the plastic ring 1. In use, the limiting grooves 11 are matched with the bolts on the flange. The flange bolts limit the position of the limiting grooves 11, thereby positioning the sealing ring during installation. This avoids misalignment and offset of the sealing ring during installation. In addition, the design of multiple limiting grooves also reduces the material cost of the plastic ring 1, thus making it more economical.

[0017] One side wall of the plastic ring 1 extends outward along the front and rear sides to form an outwardly protruding tab 12. The thickness of the outwardly protruding tab 12 is the same as that of the plastic ring 1. Its front and rear sides are respectively on the same plane as the front and rear sides of the plastic ring 1. It and the limiting groove 11 are staggered on the outer ring of the plastic ring 1. The plastic ring 1 is designed to support the installation and removal of the sealing ring by hand during use without the need for special tools, making the installation and removal of the sealing ring more convenient and quick.

[0018] Furthermore, the plastic ring 1 is made of rigid plastic. In this embodiment, it is made of glass fiber-filled modified polytetrafluoroethylene. The modified polytetrafluoroethylene has good compressive strength, high temperature resistance, and corrosion resistance. The rubber ring 2 is made of rubber material. In this embodiment, it is made of fluororubber that is antioxidant, high temperature resistant, and corrosion resistant. This design greatly improves the durability and service life of the sealing ring.

[0019] This embodiment takes the use of a sealing ring in the connection between hot steam transmission pipelines as an example. First, install the sealing ring to the corresponding installation port between the two flanges of the two pipelines. Then, align the limiting groove of the sealing ring with the flange bolts. At this point, tighten the flange bolts.

[0020] This utility model of a quick-installing rubber-plastic composite flat gasket seal ring improves the seal ring's self-sealing performance and creep resistance through a composite structure of a hard plastic ring 1 and a soft rubber ring 2. The gradient hardness design of the rubber ring 2 compensates for the unevenness of the flange surface, resulting in a more uniform pressure distribution. The design of the plastic ring 1 increases the seal ring's hardness and reduces the probability of high-pressure deformation. The combination of these two elements results in a stronger seal ring with enhanced high-temperature resistance and corrosion resistance, thus significantly extending its service life. For example, when used to replace a regular rubber seal ring, it lasts for six to twelve months. Compared to the 1-year service life of metal gaskets, its service life can be extended to more than three years. When used to replace metal gaskets, its service life can be extended to two years compared to the 1-year service life of metal gaskets. Moreover, compared to traditional asbestos gaskets, the quick-install rubber-plastic composite flat gasket sealing ring of this utility model avoids the harm of fiber dust during use, making it safer and more environmentally friendly. The design of the limiting groove 11, which cooperates with the flange bolts, prevents the sealing ring from shifting or misaligning during installation. Furthermore, the design of the external convex tab 12 makes the sealing ring easier and faster to install and remove, improving its ease of use.

[0021] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A quick-install rubber-plastic composite flat gasket sealing ring, characterized in that, It includes a plastic ring (1) and a rubber ring (2), both of which are annular sheets. The plastic ring (1) is fitted around the rubber ring (2), and the inner ring of the plastic ring (1) is connected to the outer wall of the rubber ring (2). The outer side wall of the plastic ring (1) is provided with a recessed limiting groove (11) that extends from its upper surface to its lower surface. Multiple limiting grooves (11) are evenly distributed on the side wall of the plastic ring (1) around the center of the plastic ring (1).

2. The quick-installation rubber-plastic composite flat gasket sealing ring according to claim 1, characterized in that, The outer side wall of the rubber ring (2) is provided with a concentric annular groove (21) in the middle. The annular groove (21) corresponds to the plastic ring (1), and the inner ring of the plastic ring (1) is fixed in the annular groove (21).

3. The quick-installation rubber-plastic composite flat gasket sealing ring according to claim 2, characterized in that, The rubber ring (2) and the plastic ring (1) are bonded together with glue.

4. The quick-installation rubber-plastic composite flat gasket sealing ring according to claim 1, characterized in that, One side wall of the plastic ring (1) extends outward along the front and rear sides to form an outwardly protruding tab (12), and the outwardly protruding tab (12) and the limiting groove (11) are staggered on the outer ring of the plastic ring (1).

5. The quick-installation rubber-plastic composite flat gasket sealing ring according to claim 1, characterized in that, The plastic ring (1) is made of glass fiber-filled modified polytetrafluoroethylene, and the rubber ring (2) is made of fluororubber.

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