High-toughness welding neck flange with good sealing effect

Abstract

The utility model relates to the technical field of flanges, in particular to a high-toughness butt welding flange with a good sealing effect, which comprises a high-toughness flange plate and an end part used for being welded and fixed on a pipeline, a leading-in ring is integrally formed on one side of the high-toughness flange plate, a plug ring is integrally formed at one end of the leading-in ring, and a bolt hole is formed in the surface of the high-toughness flange plate. A reserved groove is formed in one side of the high-toughness flange plate, a rubber cover is fixed in the reserved groove, a rubber ring is fixed to an inner ring opening of the rubber cover, the pipe body of the pipeline is sleeved with the rubber ring, and the welding position of the high-toughness flange plate and the pipeline is covered with the rubber ring. The flange has the beneficial effects that the contact between a welding part and the external environment is effectively isolated, and the corrosion of moisture, corrosive gas and the like on the welding part is reduced, so that the probability of corrosion of the welding part is reduced, the service life of the flange and pipeline connection is prolonged, and safe and stable operation of a pipeline system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of flanges, specifically a butt-welding flange with high toughness and good sealing effect. Background Technology

[0002] In the field of pipeline connections, weld neck flanges are a commonly used connecting component. They are used to fix the flange to the end of the pipe by welding, and then bolts are used to connect two pipes with flanges together. However, existing weld neck flanges have some problems that urgently need to be solved in practical applications.

[0003] From the perspective of flange-to-pipe connection, in traditional weld neck flanges, the welded area is directly exposed to the external environment during the welding process. Due to the complex and diverse working environment of pipelines, which may include harsh conditions such as humidity and corrosive gases, the welded area is susceptible to corrosion, leading to rust. Once the welded area rusts, it not only affects the firmness of the flange-to-pipe connection but may also cause leaks and other safety hazards, seriously affecting the normal operation of the pipeline system. Utility Model Content

[0004] The purpose of this invention is to provide a high-toughness welding flange with good sealing performance to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-toughness welding flange with good sealing effect, comprising a high-toughness flange for welding and fixing to the end of a pipe, an integrally formed guide ring on one side of the high-toughness flange, an integrally formed plug ring on one end of the guide ring, bolt holes on the surface of the high-toughness flange, a reserved groove on one side of the high-toughness flange, a rubber cover fixed inside the reserved groove, a rubber ring fixed at the inner ring of the rubber cover, the rubber ring being fitted onto the pipe body, and the rubber ring covering the weld joint between the high-toughness flange and the pipe.

[0006] Preferably, the outer diameter of the inlet ring is equal to the inner diameter of the pipe, the plug ring is a frustum ring, and after the high-toughness flange is placed against one end of the pipe, both the inlet ring and the plug ring are inserted into the pipe.

[0007] Preferably, the reserved groove is an annular groove, and a slot is formed on the surface of the reserved groove. The slot has a circular opening and the rubber ring has a circular cross-section. After the rubber ring is pushed into the slot, the rubber cover bends in an arc shape.

[0008] Preferably, the weld joint between the high-toughness flange and the pipe forms a weld curing strip.

[0009] Preferably, the other side of the high-toughness flange is provided with an insert groove, which is an annular groove. A sealing ring is fixed inside the insert groove. The sealing ring has an annular plate structure and the thickness of the sealing ring is greater than the depth of the insert groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model proposes a high-toughness, high-sealing-effect weld neck flange. A pre-drilled groove is created on one side of the high-toughness flange, and a rubber cover and rubber ring are installed within the groove. Before the weld curing strip is fully formed, the rubber ring is inserted into the groove, causing it to expand and deform. Once the weld curing strip is formed, the rubber ring is removed from the groove, springs back, and closes onto the pipe body, with the rubber cover covering the weld curing strip. This design effectively isolates the welded area from the external environment, reducing the erosion caused by moisture and corrosive gases, thereby lowering the probability of rust at the welded area, extending the service life of the flange-pipe connection, and ensuring the safe and stable operation of the pipeline system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a side view of the structure of this utility model;

[0014] Figure 3 for Figure 2 Sectional view of the structure at point AA;

[0015] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0016] Figure 5 This is a schematic diagram of the high-toughness flange and pipe connection structure of this utility model;

[0017] Figure 6 for Figure 5 Top view of the structure;

[0018] Figure 7 for Figure 6 Structural cross-section view at point BB;

[0019] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B.

[0020] In the diagram: 1. High-toughness flange; 2. Inlet ring; 3. Plug ring; 4. Bolt hole; 5. Reserved groove; 6. Clip groove; 7. Rubber cover; 8. Rubber ring; 9. Pipe; 10. Welding curing strip; 11. Embedding groove; 12. Sealing ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model 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 this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Please see Figures 1-8 This utility model provides a technical solution: a high-toughness welding flange with good sealing effect, including a high-toughness flange 1 for welding and fixing to the end of a pipe 9. Bolt holes 4 are provided on the surface of the high-toughness flange 1. An insert ring 2 is integrally formed on one side of the high-toughness flange 1, and a plug ring 3 is integrally formed at one end of the insert ring 2. The outer diameter of the insert ring 2 is equal to the inner diameter of the pipe 9. The plug ring 3 is a frustoconical ring. After the high-toughness flange 1 is placed against one end of the pipe 9, both the insert ring 2 and the plug ring 3 are inserted into the pipe 9. The weld joint between the high-toughness flange 1 and the pipe 9 forms a weld curing strip 10. The insert ring 2 and the plug ring 3 are pre-inserted into the opening of the pipe 9, and then welding equipment is used to weld the joint between the high-toughness flange 1 and the insert ring 2 to form the weld curing strip 10, thus fixing the high-toughness flange 1 to the end of the pipe 9.

[0023] A pre-drilled groove 5 is provided on one side of the high-toughness flange 1. A rubber cover 7 is fixed inside the pre-drilled groove 5, and a rubber ring 8 is fixed to the inner ring of the rubber cover 7. The rubber ring 8 is fitted onto the pipe body of the pipe 9, covering the weld between the high-toughness flange 1 and the pipe 9. The pre-drilled groove 5 is an annular groove, and a retaining groove 6 is provided on its surface. The retaining groove 6 has a circular opening at its cross-section, and the rubber ring 8 has a circular cross-section. After the rubber ring 8 is pushed into the retaining groove 6, the rubber cover 7 bends in an arc shape. When the weld curing strip 10 is not yet formed, the rubber ring 8 is stuck in the retaining groove 6, and at this time, the rubber ring 8 is expanded and deformed. When the weld curing strip 10 is formed, the rubber ring 8 is pulled out from the retaining groove 6, and the rubber ring 8 springs back and closes onto the pipe body of the pipe 9. At this time, the rubber cover 7 covers the weld curing strip 10, reducing the probability of corrosion of the weld curing strip 10.

[0024] On the other side of the high-toughness flange 1, there is an insert groove 11. The insert groove 11 is an annular groove. A sealing ring 12 is fixed inside the insert groove 11. The sealing ring 12 is an annular plate structure. The thickness of the sealing ring 12 is greater than the depth of the insert groove 11. When two sets of pipes 9 with high-toughness flanges 1 installed are close together and need to be connected, the bolts are passed through the bolt holes 4 on the surfaces of the two sets of high-toughness flanges 1 and the bolts are tightened. At this time, the sealing ring 12 is tightly squeezed between the two high-toughness flanges 1 to ensure the sealing performance after the two high-toughness flanges 1 are connected.

[0025] Method for using a high-toughness weld neck flange with good sealing performance: Place the side of the high-toughness flange 1 with the guide ring 2 and plug ring 3 close to the end of the pipe 9. Since the outer ring diameter of the guide ring 2 is equal to the inner ring diameter of the pipe 9, and the plug ring 3 is a frustum ring, the guide ring 2 and plug ring 3 can be easily pushed into the pipe opening of the pipe 9, thus initially positioning the high-toughness flange 1 at the end of the pipe 9. Use welding equipment to weld the joint between the high-toughness flange 1 and the guide ring 2. After welding, a weld curing strip 10 is formed, at which point the high-toughness flange 1 is firmly fixed to the end of the pipe 9. A reserved groove 5 is opened on one side of the high-toughness flange 1. The surface of the reserved groove 5 has a retaining groove 6. The retaining groove 6 is a circular groove with a round opening. The rubber ring 8 is a circular ring with a circular cross-section. Push the rubber ring 8 into the retaining groove 6. At this time, the rubber ring 8 is expanded and deformed. The rubber cover 7 fixed at the inner ring opening of the rubber ring 8 then bends in an arc shape, and the rubber ring 8 covers the weld joint between the high-toughness flange 1 and the pipe 9. After the welding curing strip 10 is formed, the rubber ring 8 is pulled out from the groove 6. The rubber ring 8 springs back and closes, fitting onto the pipe body of the pipe 9. At this time, the rubber cover 7 covers the welding curing strip 10, which can effectively reduce the probability of corrosion of the welding curing strip 10. When it is necessary to connect two sets of pipes 9 with high-toughness flanges 1, the ends of the two sets of pipes 9 with high-toughness flanges 1 are brought together. The bolts are passed through the bolt holes 4 on the surfaces of the two sets of high-toughness flanges 1. The bolts are tightened using a tool. During the tightening process, the sealing ring 12 (the sealing ring 12 has an annular plate structure and a thickness greater than the depth of the mounting groove 11) in the mounting groove 11 on the other side of the high-toughness flange 1 will be tightly squeezed between the two high-toughness flanges 1, thereby ensuring the sealing performance of the two high-toughness flanges 1 after connection, completing the connection and sealing operation of the pipe.

[0026] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-toughness sealing effect good butt flange, comprising a high-toughness flange plate (1) for being welded and fixed at the end of a pipeline (9), one side of the high-toughness flange plate (1) is integrally formed with a lead-in ring (2), one end of the lead-in ring (2) is integrally formed with a plug ring (3), and the surface of the high-toughness flange plate (1) is provided with bolt holes (4), characterized in that: The high-toughness flange plate (1) is provided with a reserved groove (5) on one side, the rubber cover (7) is fixed in the reserved groove (5), the rubber ring (8) is fixed on the inner ring opening of the rubber cover (7), the rubber ring (8) is sleeved on the pipe body of the pipeline (9), and the rubber ring (8) covers the welding position of the high-toughness flange plate (1) and the pipeline (9).

2. A high-toughness, tight-seal butt flange according to claim 1, characterized in that: The outer ring diameter of the lead-in ring (2) is equal to the inner ring opening diameter of the pipeline (9), the plug ring (3) is a circular truncated cone ring, the high-toughness flange plate (1) is arranged on one end of the pipeline (9), and the lead-in ring (2) and the plug ring (3) are inserted into the pipeline (9).

3. A high-toughness, tight-seal butt flange according to claim 1, characterized in that: The reserved groove (5) is an annular groove, the surface of the reserved groove (5) is provided with a clamping groove (6), the break of the clamping groove (6) is a circular ring groove with a circular opening, the rubber ring (8) is a circular ring with a circular cross section, and the rubber cover (7) is bent in an arc shape after the rubber ring (8) is pushed into the clamping groove (6).

4. The high-toughness, tight-seal butt flange of claim 1, wherein: The welding position of the high-toughness flange plate (1) and the pipeline (9) forms a welding solidification strip (10).

5. A high-toughness, tight-seal butt flange according to claim 1, characterized in that: The other side of the high-toughness flange plate (1) is provided with an embedded groove (11), the embedded groove (11) is an annular groove, the sealing ring (12) is fixed in the embedded groove (11), the sealing ring (12) is an annular plate-shaped structure, and the thickness of the sealing ring (12) is greater than the depth of the embedded groove (11).

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