A split sealing gasket adapted to a concentric flow channel

Abstract

The present invention discloses a split sealing gasket adapted to a concentric flow channel, which includes a central ring gasket and an outer ring gasket. Among them, annular boss structures are provided on both the upper side and the lower side of the outer ring gasket, and a number of flow holes are provided on the outer ring gasket. The central ring gasket is embedded in the central through hole of the outer ring gasket. This gasket can be applied to a concentric casing to effectively seal the inner and outer layer fluids, and has a good sealing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical design and fluid pipeline sealing, and relates to a split sealing gasket adapted to a concentric flow channel. Background Art

[0002] In recent years, with the rapid development of industrial technology, the fluid pipeline transportation technology, which is an important part of the modern industrial logistics system, has also shown a diversified development trend. Among them, concentric sleeve pipelines, due to their special advantages in some aspects, are increasingly applied to industrial systems. The technologies related to the design, manufacture, installation, use, maintenance, etc. of concentric sleeves have gradually developed. In particular, the related installation accessories are directly related to the use performance of this type of pipeline.

[0003] The connection of traditional concentric sleeve pipelines generally adopts the methods of welding or gasket pre-positioning. Such methods can meet the requirements in some application scenarios. However, when high precision and repeated disassembly and assembly are required, the disadvantages of traditional connection methods are obvious. The connection type of a sealing surface and a sealing gasket can effectively solve the problems encountered in the connection operation of concentric sleeve pipelines, especially in the application scenarios of small-size and high-precision concentric sleeves.

[0004] As a key component of the fluid pipeline transportation system, the sealing gasket is commonly used for the sealing between flanges during pipeline connection. The quality of its use performance is directly related to the safe, stable and efficient operation of the entire system. When the pipeline sealing gasket is in use, it is fixed tightly between the sealing surfaces by the external force applied to the sealing structure (such as a flange), realizing the effective isolation and sealing of the middle part of the gasket and the external space. The inside of the gasket is in direct contact with the fluid medium inside the pipeline, which requires that the physical properties of the gasket material should be applicable to a series of special conditions such as temperature resistance, corrosion resistance, and fatigue resistance. In addition, since the gasket is often subjected to the extrusion of the sealing surface and the pressure of the internal medium, and there are radial and axial deformations at the same time, there are also high requirements for the material and structural strength of the gasket.

[0005] For concentric sleeve pipelines, due to their structural and usage characteristics, that is, there are large differences in many aspects such as the chemical properties and physical characteristics of the fluid media in the inner pipe and the outer pipe, there are higher structural and performance requirements for the related sealing gaskets. In addition, for concentric sleeve pipelines connected by the method of a sealing surface and a gasket, the processing dimension accuracy requirements for the inner and outer layer pipeline sealing surfaces are relatively high, and the situation of different interlayer sealing effects is likely to occur. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provide a split sealing gasket adapted to a concentric flow channel. This gasket can be applied to concentric sleeves, realizing the effective sealing of the inner and outer layer fluids, and having a good sealing effect.

[0007] To achieve the above object, the split sealing gasket adapted to the concentric flow channel of the present invention includes a central ring gasket and an outer ring gasket. Among them, annular boss structures are provided on both the upper side and the lower side of the outer ring gasket. A number of flow holes are provided on the outer ring gasket, and the central ring gasket is embedded in the central through hole of the outer ring gasket.

[0008] Each flow hole is evenly distributed along the circumferential direction.

[0009] The axes of the central ring gasket and the outer ring gasket coincide.

[0010] In use, both the central ring gasket and the outer ring gasket are located between two concentric sleeves. And the end face of the inner tube body of the concentric sleeve in the concentric sleeve is sealed with the surface of the central ring gasket, and the end of the outer tube body of the concentric sleeve in the concentric sleeve is sealed with the surface of the outer ring gasket.

[0011] The diameter of the central through hole of the outer ring gasket is larger than the outer diameter of the central ring gasket.

[0012] The inner diameter of the central ring gasket is larger than the inner diameter of the inner tube body of the concentric sleeve, and the outer diameter of the central ring gasket is smaller than the outer diameter of the inner tube body of the concentric sleeve.

[0013] The thickness of the central ring gasket is H1, and the thickness of the outer ring gasket is H2, and H1 > H2.

[0014] The cross-section of the annular boss structure is a trapezoidal structure.

[0015] The distance H3 between the tops of the two annular boss structures > the thickness H1 of the central ring gasket.

[0016] The material hardness of the outer ring gasket is less than that of the central ring gasket, and the compression margin of the outer ring gasket is greater than that of the central ring gasket.

[0017] The present invention has the following beneficial effects:

[0018] When the split sealing gasket adapted to the concentric flow channel of the present invention is specifically operated, both the central ring gasket and the outer ring gasket are located between two concentric sleeves. And the end face of the inner tube body of the concentric sleeve in the concentric sleeve is sealed with the surface of the central ring gasket, and the end of the outer tube body of the concentric sleeve in the concentric sleeve is sealed with the surface of the outer ring gasket to achieve effective sealing of the inner and outer layer fluids. At the same time, annular boss structures are provided on both the upper side and the lower side of the outer ring gasket. During installation, the sealing effect is improved through the deformation of the annular boss structure. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the shape and assembly of the split gasket for the concentric flow channel.

[0020] Figure 2a It is a schematic structural diagram of the split gasket for the concentric flow channel;

[0021] Figure 2b is Figure 2a a sectional view taken along the A-A direction in

[0022] Figure 3 a schematic diagram showing the installation and use of a concentric flow channel split gasket.

[0023] Among them, 1 is a central ring gasket, 2 is an outer ring gasket, 3 is an annular boss structure, 4 is a through-flow hole, 5 is an inner tube body of a concentric sleeve, and 6 is an outer tube body of a concentric sleeve. Specific embodiments

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present invention disclosure. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessarily confusing the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0025] Structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, and for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are only exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0026] Referring to Figure 1 , the split sealing gasket adapted to the concentric flow channel according to the present invention includes a central ring gasket 1 and an outer ring gasket 2. Among them, annular boss structures 3 are provided on both the upper side and the lower side of the outer ring gasket 2, and a plurality of through-flow holes 4 are provided on the outer ring gasket 2, and the through-flow holes 4 are evenly distributed along the circumferential direction.

[0027] The central ring gasket 1 is embedded in the central through-hole of the outer ring gasket 2, and the axes of the central ring gasket 1 and the outer ring gasket 2 coincide. The inner diameter of the central ring gasket 1 is larger than the inner diameter of the inner tube body 5 of the concentric sleeve to be adapted to ensure that the through-flow characteristics of the inner tube body 5 of the concentric sleeve are not affected. The outer diameter of the central ring gasket 1 is smaller than the outer diameter of the inner tube body 5 of the concentric sleeve to avoid affecting the through-flow characteristics of the outer flow channel. As Figure 2a and Figure 2b shown, the thickness of the central ring gasket 1 is H1.

[0028] The aperture of the central through-hole of the outer ring gasket 2 is larger than the outer diameter of the central ring gasket 1, and the thickness of the outer ring gasket 2 is H2, where H1 > H2. This ensures that when the gasket is compressed in the working position, the thickness of the outer ring gasket 2 does not affect the normal axial compression deformation of the central ring gasket 1 and forms an effective sealing effect.

[0029] Annular boss structures 3 are provided on both side surfaces of the outer ring gasket 2. The cross-section of the annular boss structure 3 is trapezoidal, which ensures that when the structure is compressed in the working position, it can produce effective axial deformation. The distance H3 between the tops of the two annular boss structures 3 is greater than the thickness H1 of the central ring gasket 1, which can ensure that when the gasket is installed and compressed, the outer tube body 6 of the concentric sleeve first comes into contact with the annular boss structure 3 and is compressed and deformed to form a seal, and then the deformation between the central ring gasket 1 and the outer ring gasket 2 does not affect each other.

[0030] A number of flow-through holes 4 are provided on the outer ring gasket 2. The flow-through holes 4 are designed and processed according to the flow characteristics of the medium in the outer flow channel, that is, on the premise of ensuring the stable flow-through characteristics of the outer flow channel, the overall strength of the outer ring gasket 2 is enhanced, and at the same time, it plays a positioning role in the centering installation of each part of the entire gasket.

[0031] As Figure 3 shown, when the gasket described in the present invention is used and installed, the gasket is compressed by the upper concentric sleeve structure and the lower concentric sleeve structure. The inner fluid in the inner tube body 5 of the concentric sleeve flows through the central through-hole of the central ring gasket 1, and the outer fluid in the outer tube body 6 of the concentric sleeve flows through the flow-through holes 4 on the outer ring gasket 2.

[0032] After the concentric sleeve is compressed, the whole gasket is in an axially compressed state. The upper and lower surfaces of the central ring gasket 1 are pressed against the end faces of the inner tube body 5 of the concentric sleeve, and the inner and outer fluids are effectively isolated and sealed by contacting the surface of the inner tube body 5 of the concentric sleeve with the central ring gasket 1. At the same time, the annular boss structure 3 contacts the end face of the outer tube body 6 of the concentric sleeve and undergoes axial deformation under compression, and finally forms a seal between the outer tube body 6 of the concentric sleeve and the outer ring gasket 2. Among them, the outer fluid is effectively isolated and sealed from the outside of the tube through the sealing surface formed at this position.

[0033] The material hardness of the outer ring gasket 2 is less than the material hardness of the central ring gasket 1, and the compression margin of the outer ring gasket 2 is greater than the compression margin of the central ring gasket 1, which can ensure that the compression deformation between the central ring gasket 1 and the outer ring gasket 2 does not affect each other, that is, the compression margin of the outer ring gasket 2 can effectively eliminate the influence of the unevenness of the end faces of the inner tube body 5 of the concentric sleeve and the outer tube body 6 of the concentric sleeve on the compression gasket effect, reduce the requirements for the pretreatment of the end faces of the concentric sleeve, and improve the practicability of the gasket.

[0034] In addition, when the inner-layer fluid of the concentric casing has high requirements for the contact material and the cost of this material is high, the center ring gasket 1 can be made of the high-cost material, and the outer ring gasket 2 can be made of the low-cost material, so as to reduce the overall material cost of the gasket and achieve the efficient utilization of the high-cost material.

[0035] When the requirements for the flow characteristics of the inner-layer fluid are high, the shape and arrangement of the flow holes 4 on the outer ring gasket 2 can be changed, that is, the area of the flow holes 4 is enlarged as much as possible, and only the minimum structure for the centering placement of the center ring gasket 1 is retained. The shape and arrangement of the flow holes 4 need to be designed and processed according to the actual situation of the flow characteristics.

[0036] When the concentric casing has a three-layer or even more-layer structure, the same type of annular gasket can be continuously added to the outer layer of the outer ring gasket 2, and the same installation method can be used to complete the axial compression seal connection of the multi-layer concentric casing.

[0037] Finally, it should be noted that through the ingenious split gasket structure design, the present invention solves the problem of gasket seal failure caused by insufficient machining accuracy of the sealing surface of the concentric casing pipeline, avoids the losses caused by such problems, meets the different requirements of the inner and outer layer fluids of the concentric casing for the gasket characteristics, reduces the overall production and manufacturing cost of the gasket, and provides a new technical solution for the axial compression seal connection of the concentric casing pipeline. The present invention can efficiently complete operations such as production, installation, use and maintenance in practical applications. The simple structure and convenient processing method can also ensure the quality of the whole process of the product. Moreover, the design is reasonable, the structure is ingenious, it is safe and reliable, highly practical, and efficient and environmentally friendly.

Claims

1. A split sealing gasket adapted to a concentric flow channel, characterized in that, It includes a central ring gasket (1) and an outer ring gasket (2). Among them, annular boss structures (3) are provided on both the upper side and the lower side of the outer ring gasket (2). A number of flow holes (4) are provided on the outer ring gasket (2), and the central ring gasket (1) is embedded in the central through hole of the outer ring gasket (2). During use, both the central ring gasket (1) and the outer ring gasket (2) are located between two concentric sleeves. And the end face of the inner tube body (5) of the concentric sleeve in the concentric sleeves is sealed with the surface of the central ring gasket (1), and the end of the outer tube body (6) of the concentric sleeve in the concentric sleeves is sealed with the surface of the outer ring gasket (2). The diameter of the central through hole of the outer ring gasket (2) is larger than the outer diameter of the central ring gasket (1). The inner diameter of the central ring gasket (1) is larger than the inner diameter of the inner tube body (5) of the concentric sleeve, and the outer diameter of the central ring gasket (1) is smaller than the outer diameter of the inner tube body (5) of the concentric sleeve. The thickness of the central ring gasket (1) is H1, and the thickness of the outer ring gasket (2) is H2, and H1 > H2. The cross-section of the annular boss structure (3) is a trapezoidal structure. The distance H3 between the tops of the two annular boss structures (3) is greater than the thickness H1 of the central ring gasket (1). The material hardness of the outer ring gasket (2) is less than that of the central ring gasket (1), and the compression margin of the outer ring gasket (2) is greater than that of the central ring gasket (1).

2. The split sealing gasket adapted to the concentric flow channel according to claim 1, wherein Each flow hole (4) is evenly distributed along the circumferential direction.

3. The split sealing gasket adapted to the concentric flow channel according to claim 1, characterized in that, The axes of the central ring gasket (1) and the outer ring gasket (2) coincide.

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