Pipeline high-sealing-performance connecting device

Abstract

The utility model discloses a pipeline high-sealing-performance connecting device which comprises a pair of pipeline flanges arranged on a pipeline port to be connected, a gasket is embedded between the pipeline flanges arranged in a butt joint mode, a sealing fixing ring is arranged outside the pipeline flanges in a sleeved mode, and the pipeline flanges and the gasket are wrapped and sealed by the sealing fixing ring. And the sealing fixing ring, the pipeline flange and the gasket are locked through the fixing device. The utility model discloses a pipeline high-sealing connecting device convenient to operate, which locks and seals the sealing joint of a pipeline flange and a pipeline through a sealing fixing ring and a fixing device matched with the sealing fixing ring, and improves the sealing stability of the sealing joint of the pipeline and the operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a pipeline high-sealing connection device. Background Technology

[0002] In existing technologies, traditional pipe sealing connections primarily rely on flanges, gaskets, and fixing bolts and nuts. However, in certain specialized applications (such as the chemical and petroleum industries), extremely high sealing performance is required for pipeline systems, and traditional methods may not be able to meet these needs. Furthermore, with industrial development and technological advancements, the market is also presenting new challenges for more cost-effective solutions. Summary of the Invention

[0003] This invention overcomes the shortcomings of the prior art and provides a convenient and highly sealing pipe connection device. By using a sealing ring and a matching fixing device, the pipe flange and the pipe sealing connection are locked and sealed, improving the sealing stability of the pipe sealing connection and the ease of operation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-sealing pipe connection device, comprising a pair of pipe flanges disposed on the pipe port to be connected, a gasket embedded between the mating pipe flanges, a sealing ring sleeved on the outside of the pipe flanges, the sealing ring wrapping and sealing the pipe flanges and the gasket; and locking the sealing ring, pipe flanges and gaskets by a fixing device.

[0005] In a preferred embodiment of the present invention, the pipe flange includes a body connected to a pipe port, and an annular platform disposed at the end of the body, wherein a raised edge is provided on the outer periphery of the annular platform; an assembly groove is formed between the raised edge and the body.

[0006] The gasket abuts against the end faces of the annular flanges of the pipes on both sides.

[0007] In a preferred embodiment of the present invention, the sealing ring includes a sealing ring sleeve fitted on a pair of protruding edges, and sleeves respectively fitted on the body of the pipe flange. A pair of ring plates wrapped around the ring platform are provided between the spaced sleeves, and the ring plates connect the sealing ring sleeve and the sealing ring sleeve.

[0008] In a preferred embodiment of this utility model, the sealing ring, ring plate, and sleeve are an integral structure used to fit and wrap around the outside of the mating pipe flanges and seal the mating pipe flanges.

[0009] In a preferred embodiment of the present invention, the fixing device locks and assembles the sealing rings and a pair of pipe flanges and gaskets from both sides.

[0010] In a preferred embodiment of this utility model, the gasket is one of the following materials: PP gasket, PVC gasket, and PDFE gasket.

[0011] In a preferred embodiment of this utility model, the sealing ring and the pipe flange are connected by bolts and nuts, riveting, pressing, or bonding.

[0012] In a preferred embodiment of this utility model, the fixing device is one or more of the following: riveting assembly, crimping assembly, and bolt and nut assembly.

[0013] In a preferred embodiment of this utility model, the bolt and nut assembly used in the fixing device is an anti-loosening nut assembly.

[0014] In a preferred embodiment of this utility model, the sealing ring is made of one of stainless steel, galvanized carbon steel, or carbon steel.

[0015] In a preferred embodiment of this utility model, the sealing ring completely covers the flanges formed by the outward flipping of the convex edges of the pipe flanges on both sides of the pipe joint, and the downward extending annular piece of the sleeve of the sealing ring and the sealing ring sleeve wrap around and fix the pipe flange; the sealing ring is tightly connected to the pipe flange through a fixing device.

[0016] And / or, the pipe flange, sealing ring, and gasket are provided with through holes for installing the fixing device at the assembly position with the fixing device, and the fixing device is installed at the through holes of the pipe flange, sealing ring, and gasket to achieve assembly, fixing and sealing, and the fixing device is located in the assembly groove.

[0017] And / or, heat shrink tape is wrapped around the outside of the fixing device, sealing ring, pipe flange, and gasket assembly, and is wrapped around the outside of the pipe, fixing device, sealing ring, pipe flange, and gasket assembly by heat shrink tape.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0019] This utility model discloses a convenient and highly sealing pipe connection device. By using a sealing ring and a matching fixing device, the pipe flange and the pipe sealing connection are locked and sealed, which improves the sealing stability of the pipe sealing connection and the ease of operation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1This is a half-section view of a pipe high-sealing connection device according to a preferred embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of a pipe high-sealing connection device according to a preferred embodiment of the present invention;

[0023] Among them, 1-pipe flange, 11-body, 12-ring platform, 13-protruding flange, 2-gasket, 3-sealing ring, 31-sleeve, 32-ring piece, 33-sealing ring sleeve, 4-fixing device. Detailed Implementation

[0024] In the description of this invention / utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention / 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, and therefore should not be construed as a limitation on this invention / utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention / utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention / utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention / utility model based on the specific circumstances. Example 1

[0026] like Figure 1 , Figure 2 As shown, a high-sealing pipe connection device includes a pair of pipe flanges 1 disposed on the pipe ports to be connected. A gasket 2 is embedded between the mating pipe flanges 1. A sealing ring 3 is fitted over the outside of the pipe flanges 1, sealing the pipe flanges 1 and the gasket 2. The sealing ring 3, pipe flanges 1, and gasket 2 are locked in place by a fixing device 4. That is, the circumference of the pipe is as follows: Figure 1The cross-sectional structure shown surrounds the pipe to form a highly sealed connection device.

[0027] Specifically, the pipe flange 1 includes a body 13 connected to the pipe port, and an annular platform 12 disposed at the end of the body 13. A flange 11 is provided on the outer periphery of the annular platform 12. An assembly groove 14 is formed between the flange 11 and the body 13.

[0028] Specifically, the two sides of gasket 2 abut against the end faces of the annular platform 12 of the pipe flange 1 on both sides. Furthermore, gasket 2 is made of one of the following materials: PP, PVC, or PETE.

[0029] Specifically, the sealing ring 3 includes a sealing ring sleeve 31 fitted onto a pair of protruding flanges 11, and sleeves 33 respectively fitted onto the body 13 of the pipe flange 1. A pair of annular pieces 32, wrapped around annular platforms 12, are spaced apart between the sleeves 33. The annular pieces 32 connect the sealing ring sleeve 31 and the sealing ring sleeve 31. Furthermore, the sealing ring sleeve 31, annular pieces 32, and sleeves 33 form an integral structure, used to fit and wrap around the outside of the mating pipe flange 1, sealing the mating pipe flange 1. Even further, the sealing ring 3 and the pipe flange 1 are connected by bolts and nuts, riveting, crimping, or bonding. More specifically, the sealing ring 3 completely covers the flanges formed by the outward turning of the protruding flanges 11 on both sides of the pipe joint, and the downward extending annular pieces 32 of the sleeves 33 and the sealing ring sleeve 31 wrap and fix the pipe flange 1.

[0030] Specifically, the fixing device 4 secures the sealing ring 3, a pair of pipe flanges 1, and gaskets 2 from both sides. Furthermore, the fixing device 4 employs one or more of the following: riveting assembly, crimping assembly, and bolt and nut assembly. The sealing ring 3 is tightly connected to the pipe flange 1 via the fixing device 4.

[0031] More specifically, in this embodiment, when the exhaust gas pressure requirement is a low-pressure environment, located at the front end of the exhaust gas transportation line and far from the terminal fan, the pipeline pressure needs to be -300~-200Pa. The high-sealing pipeline connection device includes a pipeline flange 1, a gasket 2, a sealing ring 3, and a fixing device 4. The pipeline flange 1, as one of the basic components, is used for mechanical connection with other pipeline components. The gasket 2 is placed between the two flanges, playing a preliminary sealing role. It is selected according to the application requirements and the size of the pipeline flange 1, and the material is PDFE. The sealing ring 3 completely covers the flanges of the pipeline flange 1 on both sides of the pipeline connection, and the extension length of the lower part of the sealing ring 3 meets the fixing requirements of the pipeline flange 1; the sealing ring 3 must be tightly connected to the pipeline flange 1, and the connection method is crimping. The fixing device 4 is used to fix the sealing ring 3, the gasket 2, and the pipeline flange 1 on both sides of the pipeline connection; the fixing device 4 is crimped. Through leakage detection, compared with the traditional connection method, the leakage of this device is reduced by 50%. Example 2

[0032] like Figure 1 , Figure 2 As shown, a high-sealing pipe connection device includes a pair of pipe flanges 1 disposed on the pipe ports to be connected. A gasket 2 is embedded between the mating pipe flanges 1. A sealing ring 3 is fitted over the outside of the pipe flanges 1, sealing the pipe flanges 1 and the gasket 2. The sealing ring 3, pipe flanges 1, and gasket 2 are locked in place by a fixing device 4. That is, the circumference of the pipe is as follows: Figure 1 The cross-sectional structure shown surrounds the pipe to form a highly sealed connection device.

[0033] Specifically, the pipe flange 1 includes a body 13 connected to the pipe port, and an annular platform 12 disposed at the end of the body 13. A flange 11 is provided on the outer periphery of the annular platform 12. An assembly groove 14 is formed between the flange 11 and the body 13.

[0034] Specifically, the two sides of gasket 2 abut against the end faces of the annular platform 12 of the pipe flange 1 on both sides. Furthermore, gasket 2 is made of one of the following materials: PP, PVC, or PETE.

[0035] Specifically, the sealing ring 3 includes a sealing ring sleeve 31 fitted onto a pair of protruding flanges 11, and sleeves 33 respectively fitted onto the body 13 of the pipe flange 1. A pair of annular pieces 32, wrapped around annular platforms 12, are spaced apart between the sleeves 33. The annular pieces 32 connect the sealing ring sleeve 31 and the sealing ring sleeve 31. Furthermore, the sealing ring sleeve 31, annular pieces 32, and sleeves 33 form an integral structure, used to fit and wrap around the outside of the mating pipe flange 1, sealing the mating pipe flange 1. Even further, the sealing ring 3 and the pipe flange 1 are connected by bolts and nuts, riveting, crimping, or bonding. More specifically, the sealing ring 3 completely covers the flanges formed by the outward turning of the protruding flanges 11 on both sides of the pipe joint, and the downward extending annular pieces 32 of the sleeves 33 and the sealing ring sleeve 31 wrap and fix the pipe flange 1.

[0036] Specifically, the fixing device 4 secures the sealing ring 3, a pair of pipe flanges 1, and gaskets 2 from both sides. Furthermore, the fixing device 4 employs one or more of the following: riveting assembly, crimping assembly, and bolt and nut assembly. The sealing ring 3 is tightly connected to the pipe flange 1 via the fixing device 4.

[0037] More specifically, in this embodiment, when the pressure requirement of the exhaust gas is a medium-pressure environment, the pipeline pressure needs to be -800~-1000Pa.

[0038] The pipe flange 1, as a basic component of the high-sealing pipe connection device, is used for mechanical connection with other pipe components. The gasket 2, placed between the two flanges, provides initial sealing; its material is PDFE, selected according to application requirements and the dimensions of the pipe flange 1. The sealing ring 3 completely covers the flanges of the pipe flange 1 on both sides of the pipe joint, and its lower extension meets the fixing requirements of the pipe flange 1; the sealing ring 3 must be tightly connected to the pipe flange 1 using bolts. The fixing device 4 is used to fix the sealing ring 3, gasket 2, and pipe flanges 1 on both sides of the pipe joint; the fixing device 4 is bolted. Leakage testing shows that compared to traditional connection methods, the leakage rate of this device is reduced by 35%. Example 3

[0039] like Figure 1 , Figure 2 As shown, a high-sealing pipe connection device includes a pair of pipe flanges 1 disposed on the pipe ports to be connected. A gasket 2 is embedded between the mating pipe flanges 1. A sealing ring 3 is fitted over the outside of the pipe flanges 1, sealing the pipe flanges 1 and the gasket 2. The sealing ring 3, pipe flanges 1, and gasket 2 are locked in place by a fixing device 4. That is, the circumference of the pipe is as follows: Figure 1The cross-sectional structure shown surrounds the pipe to form a highly sealed connection device.

[0040] Specifically, the pipe flange 1 includes a body 13 connected to the pipe port, and an annular platform 12 disposed at the end of the body 13. A flange 11 is provided on the outer periphery of the annular platform 12. An assembly groove 14 is formed between the flange 11 and the body 13.

[0041] Specifically, the two sides of gasket 2 abut against the end faces of the annular platform 12 of the pipe flange 1 on both sides. Furthermore, gasket 2 is made of one of the following materials: PP, PVC, or PETE.

[0042] Specifically, the sealing ring 3 includes a sealing ring sleeve 31 fitted onto a pair of protruding flanges 11, and sleeves 33 respectively fitted onto the body 13 of the pipe flange 1. A pair of annular pieces 32, wrapped around annular platforms 12, are spaced apart between the sleeves 33. The annular pieces 32 connect the sealing ring sleeve 31 and the sealing ring sleeve 31. Furthermore, the sealing ring sleeve 31, annular pieces 32, and sleeves 33 form an integral structure, used to fit and wrap around the outside of the mating pipe flange 1, sealing the mating pipe flange 1. Even further, the sealing ring 3 and the pipe flange 1 are connected by bolts and nuts, riveting, crimping, or bonding. More specifically, the sealing ring 3 completely covers the flanges formed by the outward turning of the protruding flanges 11 on both sides of the pipe joint, and the downward extending annular pieces 32 of the sleeves 33 and the sealing ring sleeve 31 wrap and fix the pipe flange 1.

[0043] Specifically, the fixing device 4 locks and assembles the sealing ring 3, a pair of pipe flanges 1, and gaskets 2 from both sides. Furthermore, the fixing device 4 employs one or more of the following: riveting assembly, crimping assembly, and bolt and nut assembly. The sealing ring 3 is tightly connected to the pipe flange 1 via the fixing device 4. The pipe flange 1, sealing ring 3, and gasket 2 have pre-drilled through holes at their assembly points with the fixing device 4 for installing the fixing device 4. The fixing device 4 is positioned at these pre-drilled through holes in the pipe flange 1, sealing ring 3, and gasket 2 to achieve assembly, fixation, and sealing, and is located within the assembly groove 14.

[0044] More specifically, in this embodiment, when the exhaust gas pressure requirement is a high-pressure environment and the pipeline pressure needs to be -1200 to -1500 Pa, the pipe flange 1 of the high-sealing connection device is used as a basic component for mechanical connection with other pipeline components. The gasket 2 is placed between the two flanges, providing initial sealing. Its selection is based on the application requirements and the size of the pipe flange 1, and its material is PDFE. The sealing ring 3 completely covers the flanges of the pipe flange 1 on both sides of the pipe joint, and the extension length of the lower part of the sealing ring 3 meets the fixing requirements of the pipe flange 1; the sealing ring 3 must be tightly connected to the pipe flange 1, and the connection method is bolted. The fixing device 4 is used to fix the sealing ring 3, the gasket 2, and the pipe flanges 1 on both sides of the pipe joint; the fixing device 4 is bolted. Through leakage detection, compared with traditional connection methods, the leakage of this device is reduced by 15%. Example 4

[0045] like Figure 1 , Figure 2 As shown, a high-sealing pipe connection device includes a pair of pipe flanges 1 disposed on the pipe ports to be connected. A gasket 2 is embedded between the mating pipe flanges 1. A sealing ring 3 is fitted over the outside of the pipe flanges 1, sealing the pipe flanges 1 and the gasket 2. The sealing ring 3, pipe flanges 1, and gasket 2 are locked in place by a fixing device 4. That is, the circumference of the pipe is as follows: Figure 1 The cross-sectional structure shown surrounds the pipe to form a highly sealed connection device.

[0046] Specifically, the pipe flange 1 includes a body 13 connected to the pipe port, and an annular platform 12 disposed at the end of the body 13. A flange 11 is provided on the outer periphery of the annular platform 12. An assembly groove 14 is formed between the flange 11 and the body 13.

[0047] Specifically, the two sides of gasket 2 abut against the end faces of the annular platform 12 of the pipe flange 1 on both sides. Furthermore, gasket 2 is made of one of the following materials: PP, PVC, or PETE.

[0048] Specifically, the sealing ring 3 includes a sealing ring sleeve 31 fitted onto a pair of protruding flanges 11, and sleeves 33 respectively fitted onto the body 13 of the pipe flange 1. A pair of annular pieces 32, wrapped around annular platforms 12, are spaced apart between the sleeves 33. The annular pieces 32 connect the sealing ring sleeve 31 and the sealing ring sleeve 31. Furthermore, the sealing ring sleeve 31, annular pieces 32, and sleeves 33 form an integral structure, used to fit and wrap around the outside of the mating pipe flange 1, sealing the mating pipe flange 1. Even further, the sealing ring 3 and the pipe flange 1 are connected by bolts and nuts, riveting, crimping, or bonding. More specifically, the sealing ring 3 completely covers the flanges formed by the outward turning of the protruding flanges 11 on both sides of the pipe joint, and the downward extending annular pieces 32 of the sleeves 33 and the sealing ring sleeve 31 wrap and fix the pipe flange 1.

[0049] Specifically, the fixing device 4 locks and assembles the sealing ring 3, a pair of pipe flanges 1, and gaskets 2 from both sides. Furthermore, the fixing device 4 employs one or more of the following: riveting assembly, crimping assembly, and bolt and nut assembly. The sealing ring 3 is tightly connected to the pipe flange 1 via the fixing device 4. In this embodiment, the bolt and nut assembly used in the fixing device 4 is a lock-lock nut assembly, further improving the stability and sealing of the pipe connection. The pipe flange 1, sealing ring 3, and gasket 2 have pre-drilled through holes at their assembly points with the fixing device 4 for installing the fixing device 4. The fixing device 4 is positioned at these pre-drilled through holes in the pipe flange 1, sealing ring 3, and gasket 2 to achieve assembly, fixing, and sealing, and is located within the assembly groove 14. Example 5

[0050] Based on any of the embodiments in Example 2 to Example 3, such as Figure 1 , Figure 2 As shown, a high-sealing pipe connection device includes a pair of pipe flanges 1 disposed on the pipe port to be connected, a gasket 2 embedded between the mating pipe flanges 1, a sealing ring 3 sleeved on the outside of the pipe flanges 1, the sealing ring 3 covering and sealing the pipe flanges 1 and the gasket 2; and the sealing ring 3, pipe flanges 1 and gasket 2 are locked by a fixing device 4.

[0051] Specifically, the pipe flange 1 includes a body 13 connected to the pipe port, and an annular platform 12 disposed at the end of the body 13. A flange 11 is provided on the outer periphery of the annular platform 12. An assembly groove 14 is formed between the flange 11 and the body 13.

[0052] Specifically, the two sides of gasket 2 abut against the end faces of the annular platform 12 of the pipe flange 1 on both sides. Furthermore, gasket 2 is made of one of the following materials: PP, PVC, or PETE.

[0053] Specifically, the sealing ring 3 includes a sealing ring sleeve 31 fitted onto a pair of protruding edges 11, and sleeves 33 respectively fitted onto the body 13 of the pipe flange 1. A pair of annular pieces 32, wrapped around annular platforms 12, are spaced apart between the sleeves 33, connecting the sealing ring sleeve 31 and the sealing ring sleeve 31. Further, the sealing ring sleeve 31, annular pieces 32, and sleeves 33 are an integral structure, used to fit and wrap around the outside of the mating pipe flange 1, sealing the mating pipe flange 1. More specifically, the sealing ring 3 completely covers the flanges formed by the outward turning of the protruding edges 11 on both sides of the pipe flange 1 at the pipe joint, and the downward extending annular pieces 32 of the sleeve 33 and the sealing ring sleeve 31 wrap and fix the pipe flange 1. In this embodiment, the materials of the sealing ring 3 and the pipe flange 1 are stainless steel, galvanized carbon steel, or carbon steel.

[0054] Furthermore, the sealing ring 3 and the pipe flange 1 are connected by bolts and nuts, riveting, crimping, or bonding. In this embodiment, the sealing ring 3, pipe flange 1, and gasket 2 are connected by bolts and nuts. The pipe flange 1, sealing ring 3, and gasket 2 have pre-drilled through holes at their assembly points with the fixing device 4 for installing the fixing device 4. The fixing device 4 is positioned at these pre-drilled through holes in the pipe flange 1, sealing ring 3, and gasket 2 to achieve assembly, fixing, and sealing. The fixing device 4 is located within the assembly groove 14.

[0055] Furthermore, if necessary, a sealing strip can be wrapped around the contact area between the fixing device 4 and the sealing ring 3. However, this is not the only option; further sealing can be achieved by wrapping heat-shrink tape around the outside of the fixing device 4 and the sealing ring 3.

[0056] The working principle is:

[0057] In use: One end of a pair of oppositely arranged pipe flanges 1 is assembled and connected to the pipe port. A gasket 2 is sandwiched between the other ends of the pair of pipe flanges 1. Then, the oppositely arranged rings 32 and sealing rings 33 on the sealing ring 3 (wherein the cross section of the sealing ring 3 is Ω-shaped) are pried outward in opposite directions, so that the sealing ring 3 can be fitted onto the mating pair of pipe flanges 1. The sealing ring 3 wraps around the pipe flange 1 and the gasket 2. The sealing ring 3 is pressed and wrapped around the outside of the pipe flange 1 and the gasket 2 by external force. The sealing ring 3, pipe flange 1 and gasket 2 are assembled, connected and fixed by the fixing device 4 to achieve sealing assembly.

[0058] This utility model discloses a convenient and highly sealing pipe connection device. Through a sealing ring 3 and a matching fixing device 4, the pipe flange 1 and the pipe sealing connection are locked and sealed; that is, the circumference of the pipe is as follows... Figure 1 The cross-sectional structure shown encircles the pipe to form a high-sealing connection device. Compared with the traditional pipe sealing connection method using pipe flange 1, gasket 2, sealing ring 3 and fixing device 4 in the prior art, this utility model has higher sealing performance in pressure environments and is cost-effective for applications with high sealing requirements.

[0059] This invention improves the sealing stability and ease of operation of pipe sealing connections, enabling the entire system to maintain excellent sealing performance over a wider pressure range. Furthermore, due to its simple and reasonable structure, it also features high economy and ease of maintenance.

[0060] Based on the preferred embodiments of this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the claims.

Claims

1. A high-sealing pipe connection device, characterized in that: It includes a pair of pipe flanges (1) set on the pipe port to be connected, a gasket (2) is embedded between the pipe flanges (1) that are mated together, a sealing ring (3) is fitted on the outside of the pipe flanges (1), the sealing ring (3) wraps and seals the pipe flanges (1) and the gasket (2); and the sealing ring (3), pipe flanges (1) and gasket (2) are locked by a fixing device (4).

2. The high-sealing pipe connection device according to claim 1, characterized in that: The pipe flange (1) includes a body (13) connected to the pipe port, and an annular platform (12) disposed at the end of the body (13). The annular platform (12) has a raised edge (11) on its outer periphery. An assembly groove (14) is formed between the raised edge (11) and the body (13). The gasket (2) abuts against the end face of the ring platform (12) of the pipe flange (1) on both sides.

3. A high-sealing pipe connection device according to claim 2, characterized in that: The sealing ring (3) includes a sealing ring sleeve (31) fitted on a pair of protruding edges (11) and a sleeve (33) fitted on the body (13) of the pipe flange (1). A pair of ring pieces (32) wrapped on the ring platform (12) are provided between the sleeves (33) at intervals. The ring pieces (32) connect the sealing ring sleeve (31) and the sealing ring sleeve (31).

4. A high-sealing pipe connection device according to claim 3, characterized in that: The sealing ring (31), ring plate (32), and sleeve (33) are an integral structure used to fit and wrap around the outside of the mating pipe flange (1) and seal the mating pipe flange (1).

5. A high-sealing pipe connection device according to claim 4, characterized in that: The fixing device (4) locks and assembles the sealing ring (3), a pair of pipe flanges (1), and the gasket (2) from both sides respectively.

6. A high-sealing pipe connection device according to claim 5, characterized in that: The gasket (2) is made of one of the following materials: PP, PVC, or PDFE.

7. A high-sealing pipe connection device according to claim 6, characterized in that: The sealing ring (3) and the pipe flange (1) are connected by bolts and nuts, riveting, pressing, or bonding.

8. A high-sealing pipe connection device according to claim 7, characterized in that: The fixing device (4) is one or more of the following: riveting assembly, crimping assembly, bolt and nut assembly.

9. A high-sealing pipe connection device according to claim 8, characterized in that: The bolt and nut assembly used in the fixing device (4) is a locking nut assembly.

10. A high-sealing pipe connection device according to claim 8, characterized in that: The sealing ring (3) completely covers the flange formed by the outward flipping of the convex edge (11) of the pipe flange (1) on both sides of the pipe joint, and the downward extending ring (32) of the sleeve (33) of the sealing ring (3) and the sealing ring sleeve (31) wrap and fix the pipe flange (1); the sealing ring (3) is tightly connected to the pipe flange (1) through the fixing device (4). And / or, the pipe flange (1), sealing ring (3), gasket (2) are provided with through holes for the installation of the fixing device (4) at the assembly position with the fixing device (4), and the fixing device (4) is installed at the through holes of the pipe flange (1), sealing ring (3), gasket (2) to achieve assembly, fixing and sealing, and the fixing device (4) is located in the assembly groove (14); And / or, heat shrinkable tape is wrapped around the outside of the assembly of the fixing device (4), sealing ring (3), pipe flange (1), and gasket (2), and the heat shrinkable tape is wrapped around the outside of the assembly of the pipe, fixing device (4), sealing ring (3), pipe flange (1), and gasket (2).

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