High-sealing-performance flange with lining sealing groove

Abstract

The invention relates to the technical field of flanges, in particular to a high-sealing-performance flange with a lining sealing groove, which comprises flange plates, a plurality of bolt holes are formed in the surfaces of the flange plates, the flange plates are welded at the ends of a pipeline in a sleeving manner, the two flange plates are connected through bolts, and lining clamping plates are mounted at inner ring openings of the flange plates. A lining plug pipe is integrally formed in an inner ring opening of the lining clamping plate and inserted into a pipe opening of the pipeline. The sealing structure has the beneficial effect that the sealing performance is obviously improved through the multi-sealing design. The embedded grooves are formed in the surfaces of the lining clamping plates, the first sealing rings are fixed, after the two flange plates are connected and fixed through bolts, the two first sealing rings are clamped between the two lining clamping plates, a first sealing defense line is formed, and fluid in a pipeline is effectively prevented from leaking from the connecting position between the flange plates.

Description

Technical Field

[0001] This invention relates to the field of flanges, specifically a high-sealing flange with an inner sealing groove. Background Technology

[0002] In the field of pipeline connections, flange connection is a common and important connection method, widely used in various fluid transportation systems. Traditional flange connection structures typically consist only of flanges and bolts. The flanges are fitted onto the ends of the pipes and the two flanges are connected and fixed by bolts to achieve pipe docking.

[0003] However, this traditional flange connection structure has many drawbacks. Firstly, its sealing performance is limited. During long-term use, leaks are prone to occur due to pressure and temperature changes in the fluid within the pipeline, as well as external environmental factors. This not only wastes fluid but may also pollute the surrounding environment and even cause safety accidents. Secondly, the connection between the flange and the pipeline, especially the welded joints, is susceptible to corrosion from the fluid. This corrosion is particularly acute when the fluid being transported is corrosive, accelerating the corrosion rate, reducing the service life of the flange connection structure, and increasing maintenance costs and replacement frequency. Furthermore, the inner ring of traditional flanges lacks effective protective measures and has poor corrosion resistance, further affecting the reliability and stability of the entire flange connection structure.

[0004] Therefore, developing a flange connection structure with high sealing performance and good corrosion resistance is of great practical significance. Summary of the Invention

[0005] The purpose of this invention is to provide a high-sealing flange with an inner sealing groove to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-sealing flange with an inner lining sealing groove, comprising a flange, the surface of which is provided with multiple bolt holes, the flange being sleeved and welded to the end of a pipe, two flanges being connected by bolts, an inner lining plate being installed on the inner ring of the flange, and an inner lining plug being integrally formed on the inner ring of the inner lining plate, the inner lining plug being inserted into the pipe opening; The flange surface has a receiving groove, and a corrosion-resistant rubber cover is fixed inside the receiving groove. One end of the corrosion-resistant rubber cover is fitted onto the pipe body, and the corrosion-resistant rubber cover covers the welding point between the flange and the pipe.

[0007] Preferably, the inner ring of the flange is provided with an inner lining groove, which is an annular groove. The outer ring of the inner lining plate is fixed in the inner lining groove. The inner ring diameter of the inner lining plate is equal to the inner ring diameter of the pipe. After the bolts connect the two flanges, the inner lining plates between the two flanges are clamped together.

[0008] Preferably, the surface of the inner lining plate is provided with an insert groove, the insert groove is annular, and a sealing ring is fixed inside the insert groove, the thickness of the sealing ring being greater than the depth of the insert groove.

[0009] Preferably, the outer ring surface of the inner lining plug tube is provided with multiple reserved grooves, which are annular grooves. A second sealing ring is fixed inside the reserved groove. The outer ring diameter of the second sealing ring is larger than the inner ring diameter of the pipe. The second sealing ring is clamped between the inner lining plug tube and the pipe and undergoes elastic deformation.

[0010] Preferably, the receiving groove is an annular groove with an "L" shaped break. One end of the corrosion-resistant rubber cover is fixed with a rubber ring. After the corrosion-resistant rubber cover is pulled out of the receiving groove, the rubber ring is expanded and springs back and is fitted into the second slot. The second slot is opened on the outer ring surface of the pipe.

[0011] Preferably, a retaining groove is provided on the inner circumferential surface of the storage groove. The retaining groove is an annular groove. After the corrosion-resistant rubber cover is inserted into the storage groove, the rubber ring is expanded and springs back into the retaining groove.

[0012] Preferably, a rubber sealing sheet is fixed at the outer ring surface of the groove opening of the storage slot. The rubber sealing sheet has an annular plate structure, and the inner ring diameter of the rubber sealing sheet is equal to the inner ring diameter of the groove opening of the storage slot. The inner ring opening of the rubber sealing sheet is fitted onto the inner ring surface of the groove opening of the storage slot.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The high-sealing flange with an inner lining sealing groove proposed in this invention significantly improves sealing performance through a multi-seal design. An embedding groove is created on the surface of the inner lining plate, and a sealing ring is fixed therein. When the two flanges are fixed together by bolts, the two sealing rings are clamped between the two inner lining plates, forming the first line of defense for sealing and effectively preventing fluid leakage from the connection between the flanges.

[0014] Multiple pre-reserved grooves are opened on the outer ring surface of the inner lining plug and a second fixed sealing ring is fitted. When the flange is fitted and welded to the end of the pipe, the second sealing ring is clamped between the inner lining plug and the pipe and undergoes elastic deformation, forming a second sealing defense line, which further enhances the sealing effect and ensures the sealing reliability of the flange connection structure under various working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 for Figure 2 A schematic diagram of the structure after the corrosion-resistant rubber cover is stored in the storage tank; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point C; Figure 6 This is a schematic diagram of the connection structure between the flange and the inner lining plug tube of the present invention; Figure 7 This is a schematic diagram of the flange structure of the present invention.

[0016] In the diagram: Flange 1, Bolt hole 101, Inner lining groove 102, Inner lining plate 103, Inner lining plug 104, Insert groove 105, Reserved groove 106, Storage groove 107, Slot 1 108, Pipe 2, Slot 2 201, Bolt 3, Sealing ring 1 4, Sealing ring 2 5, Corrosion-resistant rubber cover 6, Rubber ring 601, Rubber sealing plate 7. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-7 This invention provides a technical solution: a high-sealing flange with an inner sealing groove, comprising a flange 1, the surface of which has multiple bolt holes 101, the flange 1 being sleeved and welded to the end of a pipe 2, two flanges 1 being connected by bolts 3, an inner lining plate 103 being installed on the inner ring of the flange 1, and an inner lining plug tube 104 being integrally formed on the inner ring of the inner lining plate 103, the inner lining plug tube 104 being inserted into the pipe opening of the pipe 2; an inner lining groove 102 is formed on the inner ring of the flange 1, the inner lining groove 102 being an annular groove, the outer ring of the inner lining plate 103 being fixed in the inner lining groove 102, the inner ring diameter of the inner lining plate 103 being equal to that of the pipe The inner ring diameter of 2, after the bolts 3 connect the two flanges 1, the inner lining plate 103 between the two flanges 1 clamps them together; the surface of the inner lining plate 103 is provided with an insert groove 105, the insert groove 105 is an annular groove, and a sealing ring 4 is fixed inside the insert groove 105, the thickness of the sealing ring 4 is greater than the depth of the insert groove 105; the outer ring surface of the inner lining plug tube 104 is provided with multiple reserved grooves 106, the reserved grooves 106 are annular grooves, and a sealing ring 5 is fixed inside the reserved grooves 106, the outer ring diameter of the sealing ring 5 is greater than the inner ring diameter of the pipe 2, and the sealing ring 5 is clamped between the inner lining plug tube 104 and the pipe 2 and undergoes elastic deformation.

[0019] The inner lining plate 103 is pre-fixed in the inner lining groove 102. When it is necessary to weld the flange 1 to the end of the pipe 2, the end of the pipe 2 is inserted between the inner ring of the flange 1 and the inner lining plug tube 104. After the end of the pipe 2 abuts against one side of the inner lining plate 103, the annular gap at the fitting point of the flange 1 and the pipe 2 is welded. The sealing ring 2 5 is clamped between the inner lining plug tube 104 and the pipe 2 to play a sealing role. After the two flanges 1 are brought together, they are connected and fixed by bolts 3. After the bolts 3 are tightened, the two sealing rings 1 4 between the two flanges 1 are clamped between the two inner lining plates 103 to play a sealing role. The inner lining plate 103 and the inner lining plug tube 104 are located at the inner ring of the flange 1 to improve the corrosion resistance of the inner ring of the flange 1.

[0020] To protect the weld joint between flange 1 and pipe 2, the following measures were proposed: A receiving groove 107 is formed on the surface of flange 1. A corrosion-resistant rubber cover 6 is fixed inside the receiving groove 107. One end of the corrosion-resistant rubber cover 6 is fitted onto the pipe body of pipe 2, covering the welding point between flange 1 and pipe 2. The receiving groove 107 is an annular groove with an "L"-shaped cut. A rubber ring 601 is fixed to one end of the corrosion-resistant rubber cover 6. After the corrosion-resistant rubber cover 6 is pulled out of the receiving groove 107, the rubber ring 601 is expanded and springs back, fitting into the second clamping groove 201. The second clamping groove 201 is formed on the pipe body. The outer ring surface of channel 2; a slot 108 is provided on the inner ring surface of the groove of the storage groove 107. The slot 108 is an annular groove. After the corrosion-resistant rubber cover 6 is inserted into the storage groove 107 for storage, the rubber ring 601 is expanded and springs back into the slot 108. A rubber sealing piece 7 is fixed on the outer ring surface of the groove of the storage groove 107. The rubber sealing piece 7 has an annular plate structure. The inner ring diameter of the rubber sealing piece 7 is equal to the inner ring diameter of the groove of the storage groove 107. The inner ring of the rubber sealing piece 7 is fitted on the inner ring surface of the groove of the storage groove 107.

[0021] After the corrosion-resistant rubber cover 6 is pulled out from the storage groove 107, it is fitted onto the pipe 2 to cover the weld between the flange 1 and the pipe 2. When the corrosion-resistant rubber cover 6 is not needed, it is inserted into the storage groove 107 for storage, and the rubber sealing plate 7 seals the opening of the storage groove 107.

[0022] Detailed instructions for using this high-sealing flange with an internal sealing groove: The inner lining plate 103 is pre-fixed in the inner lining groove 102 of the flange 1 to ensure a stable installation. The end of the pipe 2 is inserted between the inner ring of the flange 1 and the inner lining plug tube 104, so that the end of the pipe 2 abuts against one side of the inner lining plate 103. At this time, the sealing ring 5 is clamped between the inner lining plug tube 104 and the pipe 2. The annular gap at the fitting point of the flange 1 and the pipe 2 is welded, so that the flange 1 is firmly fitted and welded to the end of the pipe 2. The two flanges 1, which have been welded to the ends of the pipes 2 respectively, are brought together, aligning the bolt holes 101 of the two flanges 1. The two flanges 1 are connected and fixed by bolts 3 passing through the bolt holes 101 of the two flanges 1. After the bolts 3 are tightened, the two sealing rings 4 between the two flanges 1 are clamped between the two inner lining plates 103, providing a sealing effect. Meanwhile, the inner lining plate 103 and the inner lining plug 104 are located at the inner ring of the flange 1, which can improve the corrosion resistance of the inner ring of the flange 1. The corrosion-resistant rubber cover 6 is pulled out from the receiving groove 107 on the surface of the flange 1. One end of the corrosion-resistant rubber cover 6 is fitted onto the pipe body of the pipe 2, and the rubber ring 601 is expanded and springs back into the second groove 201 on the outer ring surface of the pipe 2, so that the corrosion-resistant rubber cover 6 covers the welding point of the flange 1 and the pipe 2, providing protection. When the corrosion-resistant rubber cover 6 is not needed, it is inserted into the receiving groove 107. During insertion, the rubber ring 601 is expanded and springs back into the first groove 108 on the inner ring surface of the receiving groove 107, ensuring that the corrosion-resistant rubber cover 6 is securely stored. The rubber sealing piece 7 seals the opening of the receiving groove 107 to prevent the corrosion-resistant rubber cover 6 from accidentally coming out, while keeping the surface of the flange 1 clean.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-sealing flange with an inner sealing groove, comprising a flange (1), the surface of which is provided with a plurality of bolt holes (101), the flange (1) being sleeved and welded to the end of a pipe (2), and two flanges (1) being connected by bolts (3), characterized in that: The flange (1) has an inner lining plate (103) installed on its inner ring. The inner ring of the inner lining plate (103) is integrally formed with an inner lining plug (104), which is inserted into the pipe opening of the pipe (2). A receiving groove (107) is provided on the surface of the flange (1). A corrosion-resistant rubber cover (6) is fixed inside the receiving groove (107). One end of the corrosion-resistant rubber cover (6) is fitted onto the pipe body of the pipe (2). The corrosion-resistant rubber cover (6) covers the welding point of the flange (1) and the pipe (2).

2. The high-sealing flange with an inner sealing groove according to claim 1, characterized in that: The flange (1) has an inner lining groove (102) at its inner ring opening. The inner lining groove (102) is an annular groove. The outer ring of the inner lining plate (103) is fixed in the inner lining groove (102). The inner ring diameter of the inner lining plate (103) is equal to the inner ring diameter of the pipe (2). After the bolts (3) connect the two flanges (1), the inner lining plates (103) between the two flanges (1) are clamped together.

3. The high-sealing flange with an inner sealing groove according to claim 1, characterized in that: The inner lining plate (103) has an insert groove (105) on its surface. The insert groove (105) is an annular groove. A sealing ring (4) is fixed inside the insert groove (105). The thickness of the sealing ring (4) is greater than the depth of the insert groove (105).

4. A high-sealing flange with an inner sealing groove according to claim 1, characterized in that: The outer ring surface of the inner lining plug tube (104) is provided with a plurality of reserved grooves (106). The reserved grooves (106) are annular grooves. A sealing ring II (5) is fixed inside the reserved groove (106). The outer ring diameter of the sealing ring II (5) is larger than the inner ring diameter of the pipe (2). The sealing ring II (5) is clamped between the inner lining plug tube (104) and the pipe (2) and undergoes elastic deformation.

5. A high-sealing flange with an inner sealing groove according to claim 1, characterized in that: The receiving groove (107) is an annular groove with an "L" shaped break. One end of the corrosion-resistant rubber cover (6) is fixed with a rubber ring (601). After the corrosion-resistant rubber cover (6) is pulled out from the receiving groove (107), the rubber ring (601) is expanded and springs back and is fitted into the second slot (201). The second slot (201) is opened on the outer ring surface of the pipe (2).

6. A high-sealing flange with an inner sealing groove according to claim 5, characterized in that: The storage groove (107) has a slot 1 (108) on the inner annular surface of the groove. The slot 1 (108) is an annular groove. After the corrosion-resistant rubber cover (6) is inserted into the storage groove (107) for storage, the rubber ring (601) is expanded and springs back into the slot 1 (108).

7. A high-sealing flange with an inner sealing groove according to claim 1, characterized in that: A rubber sealing plate (7) is fixed at the outer ring surface of the groove of the storage groove (107). The rubber sealing plate (7) has an annular plate structure. The inner ring diameter of the rubber sealing plate (7) is equal to the inner ring diameter of the groove of the storage groove (107). The inner ring of the rubber sealing plate (7) is fitted onto the inner ring surface of the groove of the storage groove (107).

Images