Socket welding flange resistant to crevice corrosion

Abstract

The utility model belongs to the technical field of flanges, and particularly relates to a socket welding flange resistant to crevice corrosion, which comprises a fixing plate. The surface of the fixing plate is clean and free of foreign matter, the sealing ring on the inner wall of the socket hole is installed in place and tightly connected with the backing ring to form a primary sealing structure, the movable ring is moved to drive the clamping pin to slide on the fixing rod through the hinge rod and compress the first spring, and a pipeline is aligned to the socket hole and slowly pushed into the socket hole. The movable ring is tightly attached to the gap between the pipeline and the socket hole through elastic deformation of the movable ring, force on the movable ring is released, the first spring in the compressed state resets to drive the clamping pin and the clamping groove to be clamped to fix the pipeline, welding operation is conducted on the contact face of the pipeline and the connecting ring, and even if a welding spot falls off, sealing is conducted through the sealing ring, the backing ring and the sealing ring; corrosive media are effectively prevented from permeating into the pipeline through gaps, the pipeline is further fixed and locked through the bayonet lock, double fixation is achieved, and the stability of the pipeline and the fixing plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, and particularly relates to a socket-welding flange resistant to crevice corrosion. Background Technique

[0002] With the development of modern industry, as an important infrastructure for transporting fluid media, the safety and reliability of pipeline systems have received increasing attention. Socket-welding flanges, as an efficient and compact connection method, are widely used in pipeline systems in multiple fields such as petroleum, chemical industry, pharmaceuticals, and food due to their simple installation, compact structure, and good sealing performance. This flange design simplifies the installation process effectively by directly inserting the end of the pipe into the stepped part of the flange ring and welding.

[0003] However, over time, the solder joints may gradually fail due to material aging, welding defects, stress concentration, or erosion from the external environment (such as temperature changes, medium scouring, etc.), resulting in the loosening or even detachment of the solder joints. The failure of the solder joints will form tiny gaps between the outer side of the pipeline and the inner wall of the flange. These gaps become the gateway for corrosive media to invade. Once the corrosive media penetrate through these gaps, they will cause continuous erosion to the pipeline and flange materials, leading to corrosion damage in the weld and its surrounding areas. This crevice corrosion will not only reduce the sealing performance of the pipeline system but also may cause a decrease in structural strength and increase the risk of leakage. Moreover, when the solder joints fall off, it will also lead to a deterioration in the connection stability between the pipeline and the flange. Therefore, we propose a socket-welding flange resistant to crevice corrosion to solve the above problems. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a socket-welding flange resistant to crevice corrosion, and solves the problems proposed in the above background technique.

[0006] (2) Technical Solutions

[0007] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0008] A socket-welding flange resistant to crevice corrosion, comprising a fixing plate, wherein a socket hole is formed in the fixing plate, a sealing ring is fixedly connected to the inner wall of the socket hole, a cushion ring is fixedly connected to the right side of the fixing plate, the outer side of the sealing ring is fixedly connected to the inner wall of the cushion ring, a fixing ring is fixedly connected to the left side of the fixing plate, a connecting ring is fixedly connected to the left side of the fixing ring, a sealing ring is fixedly connected to one side of the connecting ring, a pipeline is arranged on the socket hole, the pipeline is welded to the connecting ring, two rectangular blocks are welded to the left side of the fixing plate, a fixing rod is welded to one side of the rectangular block, a latch is slidably connected to the fixing rod, a first spring is welded between the end of the latch and one side of the corresponding rectangular block, and the first spring is movably sleeved on the corresponding fixing rod. A moving ring is slidably connected to the fixing ring, two inclined hinge rods are rotatably connected to one side of the moving ring, the end of the hinge rod is hinged to one side of the corresponding latch, and two clamping grooves are formed in the pipeline, and the clamping grooves are clamped with the corresponding latches.

[0009] Further, a plurality of connecting grooves are formed in the fixing ring in a circular shape, and connecting columns are arranged on the connecting grooves.

[0010] Further, the end of the connecting column is fixedly connected to the right side of the connecting ring.

[0011] Further, the sealing ring is located between the pipeline and the socket hole.

[0012] Further, a plurality of fixing holes are formed in the fixing plate in a circular shape.

[0013] Further, the sealing ring, the cushion ring and the sealing ring are all made of corrosion-resistant materials.

[0014] Further, two T-shaped rods are welded to the left side of the fixing ring, the T-shaped rods are slidably connected to the moving ring, a second spring is welded between the inner wall of one side of the T-shaped rod and one side of the moving ring, and the second spring is movably sleeved on the corresponding T-shaped rod.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a socket-welding flange resistant to crevice corrosion, which has the following beneficial effects:

[0017] In this utility model, by ensuring that the surface of the fixing plate is clean without foreign objects, the sealing ring on the inner wall of the socket is installed in place and is tightly connected to the gasket ring to form a preliminary sealing structure. Moving the moving ring drives the pin to move through the hinge rod. The pin slides on the fixed rod and compresses the first spring. Align the pipeline to be connected with the socket and slowly push it in until the end face of the pipeline is in close contact with the sealing ring. Through its elastic deformation, it tightly fits the gap between the pipeline and the socket. At the same time, release the force on the moving ring. The first spring in the compressed state resets, and the first spring drives the pin to engage with the card slot, thereby fixing the pipeline. Welding operations are carried out on the contact surface between the pipeline and the connecting ring. Even if the welding spot falls off, sealing is achieved through the sealing ring, gasket ring and sealing gasket, effectively preventing corrosive media from penetrating into these gaps. Moreover, the pipeline is further fixed and locked by the pin, thus achieving double fixation and improving the stability of the pipeline and the fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic three-dimensional structure diagram of the utility model;

[0019] Figure 2 is a schematic exploded three-dimensional structure diagram of the fixing plate, connecting ring and sealing gasket of the utility model;

[0020] Figure 3 is a schematic cut-away three-dimensional structure diagram of the fixing plate of the utility model;

[0021] Figure 4 For the utility model Figure 1 is an enlarged structure diagram of area A in;

[0022] Figure 5 For the utility model Figure 1 is an enlarged structure diagram of area B in.

[0023] In the figure: 1, fixing plate; 2, socket; 3, sealing ring; 4, gasket ring; 5, fixed ring; 6, connecting ring; 7, sealing gasket; 8, pipeline; 9, connecting groove; 10, connecting column; 11, fixing hole; 12, rectangular block; 13, fixed rod; 14, pin; 15, first spring; 16, moving ring; 17, hinge rod; 18, card slot; 19, T-shaped rod; 20, second spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment

[0026] As Figure 1-5 shown, a socket-welding flange resistant to crevice corrosion proposed by an embodiment of the present utility model includes a fixing plate 1. A socket hole 2 is provided on the fixing plate 1. A sealing ring 3 is fixedly connected to the inner wall of the socket hole 2. A gasket ring 4 is fixedly connected to the right side of the fixing plate 1. The outer side of the sealing ring 3 is fixedly connected to the inner wall of the gasket ring 4. A fixing ring 5 is fixedly connected to the left side of the fixing plate 1. A connecting ring 6 is fixedly connected to the left side of the fixing ring 5. A sealing ring 7 is fixedly connected to one side of the connecting ring 6. A pipeline 8 is provided on the socket hole 2. The pipeline 8 is welded to the connecting ring 6. Two rectangular blocks 12 are welded to the left side of the fixing plate 1. A fixing rod 13 is welded to one side of the rectangular block 12. A latch 14 is slidably connected to the fixing rod 13. A first spring 15 is welded between the end of the latch 14 and one side of the corresponding rectangular block 12. The first spring 15 is movably sleeved on the corresponding fixing rod 13. A moving ring 16 is slidably connected to the fixing ring 5. Two inclined hinge rods 17 are rotatably connected to one side of the moving ring 16. The end of the hinge rod 17 is hinged to one side of the corresponding latch 14. Two clamping grooves 18 are provided on the pipeline 8. The clamping grooves 18 are clamped with the corresponding latches 14. First, ensure that the surface of the fixing plate 1 is clean without foreign objects, and the sealing ring 3 on the inner wall of the socket hole 2 is installed in place and is tightly connected to the gasket ring 4 to form a preliminary sealing structure. Move the moving ring 16 to drive the latch 14 to move through the hinge rod 17. The latch 14 slides on the corresponding fixing rod 13 and compresses the first spring 15. Align the pipeline 8 to be connected with the socket hole 2 and slowly push it in until the end face of the pipeline 8 is in close contact with the sealing ring 3. Through its elastic deformation, it tightly fits the gap between the pipeline 8 and the socket hole 2. At the same time, release the force on the moving ring 16. The first spring 15 in the compressed state resets. The first spring 15 drives the corresponding latch 14 to be clamped with the clamping groove 18, thereby fixing the pipeline 8. Welding operation is performed on the contact surface between the pipeline 8 and the connecting ring 6. Even if the welding point falls off, sealing is performed through the sealing ring 3, the gasket ring 4 and the sealing ring 7, effectively preventing corrosive media from penetrating into these gaps. Moreover, the pipeline 8 is further fixed and locked by the latch 14, thereby double fixing and improving the stability between the pipeline 8 and the fixing plate 1.

[0027] In some embodiments, a plurality of connecting grooves 9 are annularly provided on the fixing ring 5. A connecting column 10 is provided on the connecting groove 9. The end of the connecting column 10 is fixedly connected to the right side of the connecting ring 6. The setting of the connecting column 10 increases the stability between the connecting ring 6 and the fixing ring 5.

[0028] In some embodiments, the sealing ring 7 is located between the pipeline 8 and the socket hole 2. Through the setting of the sealing ring 7, when the welding point falls off, the sealing ring 7 seals it, effectively preventing medium leakage.

[0029] In some embodiments, a plurality of fixing holes 11 are annularly formed on the fixing plate 1. The arrangement of the fixing holes 11 can fix the entire device in place during use.

[0030] In some embodiments, the sealing ring 3, the gasket ring 4 and the sealing ring 7 are all made of corrosion-resistant materials. These materials can resist the corrosive components in the medium and maintain the stability of their physical and chemical properties, thereby ensuring that the seal will not fail due to corrosion during long-term use.

[0031] In some embodiments, two T-shaped rods 19 are welded to the left side of the fixing ring 5. The T-shaped rods 19 are slidably connected to the moving ring 16. A second spring 20 is welded between the inner wall of one side of the T-shaped rod 19 and one side of the moving ring 16. The second spring 20 is movably sleeved on the corresponding T-shaped rod 19.

[0032] Working principle or structural principle. During use, first, ensure that the surface of the fixing plate 1 is clean and free of foreign objects. The sealing ring 3 on the inner wall of the socket 2 is installed in place and is tightly connected to the gasket ring 4 to form a preliminary sealing structure. At the same time, the fixing ring 5 is pre-assembled to the connecting ring 6 through the connecting groove 9 thereon and the connecting column 10 to ensure the stability of the overall structure. Move the moving ring 16. The moving ring 16 slides on the T-shaped rod 19 and compresses the second spring 20. The moving ring 16 drives the corresponding pin 14 to move through the hinge rod 17. The pin 14 slides on the corresponding fixing rod 13 and compresses the first spring 15, so that the two pins 14 move away from each other. Then, align the pipeline 8 to be connected with the socket 2 and slowly push it in until the end face of the pipeline 8 is in close contact with the sealing ring 3. During this process, the sealing ring 7, as the main sealing element, tightly fits the gap between the pipeline 8 and the socket 2 through its elastic deformation, effectively preventing medium leakage. At the same time, release the force on the moving ring 16. The first spring 15 in the compressed state resets. The first spring 15 drives the corresponding pin 14 to be engaged with the card slot 18, thereby fixing the pipeline 8. Welding operation is performed on the contact surface between the pipeline 8 and the connecting ring 6. Since the connecting ring 6 has been pre-fixed and connected to the fixing ring 5 and the connecting column 10, the welding process can not only ensure the firm connection between the pipeline 8 and the flange, but also evenly disperse the stress to the entire flange structure through the connecting ring 6. Even if the solder joint falls off, through the sealing of the sealing ring 3, the gasket ring 4 and the sealing ring 7, it effectively prevents the corrosive medium from penetrating into these gaps, and further fixes and locks the pipeline 8 through the pin 14, thereby achieving double fixation and improving the stability of the pipeline 8 and the fixing plate 1.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A socket-welding flange resistant to crevice corrosion, comprising a fixing plate (1), characterized in that: The fixed plate (1) is provided with a socket (2), and a sealing ring (3) is fixedly connected to the inner wall of the socket (2). A cushion ring (4) is fixedly connected to the right side of the fixed plate (1). The outer side of the sealing ring (3) is fixedly connected to the inner wall of the cushion ring (4). A fixing ring (5) is fixedly connected to the left side of the fixed plate (1). A connecting ring (6) is fixedly connected to the left side of the fixing ring (5). A sealing ring (7) is fixedly connected to one side of the connecting ring (6). A pipe (8) is arranged on the socket (2), and the pipe (8) is welded to the connecting ring (6). Two rectangular blocks (12) are welded to the left side of the fixed plate (1). A fixing rod (13) is welded to one side of the rectangular block (12). A latch (14) is slidably connected to the fixing rod (13). A first spring (15) is welded between the end of the latch (14) and one side of the corresponding rectangular block (12). The first spring (15) is movably sleeved on the corresponding fixing rod (13). A moving ring (16) is slidably connected to the fixing ring (5). Two inclined hinge rods (17) are rotatably connected to one side of the moving ring (16). The end of the hinge rod (17) is hinged to one side of the corresponding latch (14). Two clamping grooves (18) are formed in the pipe (8), and the clamping grooves (18) are clamped with the corresponding latches (14).

2. A socket-welding flange resistant to crevice corrosion according to claim 1, characterized in that: A plurality of connecting grooves (9) are formed in the fixing ring (5) in a circular shape, and connecting columns (10) are arranged on the connecting grooves (9).

3. A socket-weld flange resistant to crevice corrosion according to claim 2, characterized in that: The end of the connecting column (10) is fixedly connected to the right side of the connecting ring (6).

4. A socket-welding flange resistant to crevice corrosion according to claim 1, wherein: The sealing ring (7) is located between the pipe (8) and the socket (2).

5. A socket-welding flange resistant to crevice corrosion according to claim 1, characterized in that: A plurality of fixing holes (11) are formed in the fixed plate (1) in a circular shape.

6. A socket-welding flange resistant to crevice corrosion according to claim 1, wherein: The sealing ring (3), the cushion ring (4) and the sealing ring (7) are all made of corrosion-resistant materials.

7. A socket-welding flange resistant to crevice corrosion according to claim 1, characterized in that: Two T-shaped rods (19) are welded to the left side of the fixing ring (5). The T-shaped rods (19) are slidably connected to the moving ring (16). A second spring (20) is welded between the inner wall of one side of the T-shaped rod (19) and one side of the moving ring (16). The second spring (20) is movably sleeved on the corresponding T-shaped rod (19).

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