Butt-welding ring loose sleeve flange

Abstract

This utility model provides a weld neck loose flange, relating to the field of flange technology. The utility model includes a flange and an accessory pipe. The outer surface of the flange has several mounting holes distributed circumferentially. A through hole is located in the middle of the outer surface of the flange. A retaining ring is fixedly connected to one end of the accessory pipe. The size and shape of the outer surface of the accessory pipe are adapted to the size and shape of the inner wall of the through hole on the outer surface of the flange. A reinforcing structure is provided on the outer surface of the accessory pipe, including a collar. A reinforcing ring is fixedly connected to one side of the slider. By providing this reinforcing structure, when using a weld neck loose flange to connect pipes, the reinforcing ring is installed outside the welding position between the accessory pipe and the pipe, reinforcing the outside of the welding position and enhancing the load-bearing capacity at the connection point. This improves the strength and service life of the weld neck loose flange.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, and in particular to a weld neck flange. Background Technology

[0002] Welded ring loose flanges, also known as slip-on flanges, mainly consist of a flange and flange accessories. The flange accessories are made of the same material as the pipe, while the flange material can be different from the pipe. The flange accessories are welded to the pipe and come into contact with the medium inside the pipe, while the flange itself is not connected to the pipe and does not come into contact with the medium inside the pipe. There are no requirements for the corrosion resistance of the flange, so it is more suitable for pipelines transporting corrosive media.

[0003] During flange installation, the connection between the auxiliary components and the pipeline is achieved by welding. The two auxiliary components are then connected by a flange. Since the pipeline and the flange bear the load through the connection between the auxiliary components and the pipeline, the load at the connection between the auxiliary components and the pipeline is relatively large. When the pressure in the pipeline system increases, there is a risk of breakage and leakage, which leads to a decrease in the stability and performance of the flange during use. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the connection between the pipe and the flange is supported by auxiliary components, which leads to a large load at the connection between the auxiliary components and the pipe. This results in a risk of breakage and leakage when the pressure in the pipeline system increases, and a decrease in the stability and performance of the flange during use. The proposed invention is a weld ring loose flange.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a weld ring loose flange, including a flange and an accessory pipe. The outer surface of the flange has several mounting holes distributed circumferentially on the outer surface of the flange. A through hole is provided in the middle of the outer surface of the flange. One end of the accessory pipe is fixedly connected to a retaining ring. The size and shape of the outer surface of the accessory pipe are adapted to the size and shape of the inner wall of the through hole on the outer surface of the flange. The outer surface of the accessory pipe is provided with a reinforcement structure that can reinforce the welding position between the accessory pipe and the pipeline.

[0006] Preferably, the reinforcing structure includes a collar, with groove blocks fixedly connected to the upper and lower ends of the collar, and through holes of the same specifications as the mounting holes on the outer surface of the flange on the outer surface of the groove block. A groove rod is fixedly connected to one side of the groove block, and a slider is slidably connected to the inner wall of the groove rod. A spring is provided at one end of the slider, and the two ends of the spring are fixedly connected to one end of the inner wall of the groove rod and one end of the slider, respectively. A reinforcing ring is fixedly connected to one side of each of the two sliders.

[0007] Preferably, a positioning groove is provided on one side of the groove rod, and a protrusion is fixedly connected to one side of the slider.

[0008] Furthermore, a round rod is fixedly connected to one end of the inner wall of the groove rod, and the slider slides on the outer surface of the round rod.

[0009] Furthermore, a slot is provided on one side of the groove rod, a rotating shaft is rotatably connected to the top of the protrusion, a coil spring is provided at one end of the rotating shaft, the two ends of the coil spring are fixedly connected to one side of the rotating shaft and one side of the protrusion respectively, and a locking block is fixedly connected to the outer surface of the rotating shaft.

[0010] Furthermore, an arc-shaped protrusion is fixedly connected to one side of the top of the card block.

[0011] Furthermore, a rubber sealing ring is fixedly connected to the end of the reinforcing ring away from the slider, and the outer surface of the sealing ring is conical.

[0012] Furthermore, a positioning rod is fixedly connected to the end of the groove block away from the collar, and a rubber pad is provided on one side of the positioning rod.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] In this utility model, by setting a reinforcement structure, when using a loose flange with a welding ring to connect pipes, the reinforcement ring is installed on the outside of the welding position between the accessory pipe and the pipe, thereby reinforcing the outside of the welding position between the accessory pipe and the pipe, enhancing the load-bearing capacity of the connection between the accessory pipe and the pipe, and improving the strength and service life of the loose flange with the welding ring. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is an exploded three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the collar of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the grooved rod of this utility model;

[0019] Figure 5 This utility model Figure 4 A magnified three-dimensional structural diagram of point A.

[0020] Legend: 1. Flange; 2. Reinforcing structure; 21. Collar; 22. Groove block; 23. Groove rod; 24. Slider; 25. Reinforcing ring; 26. Spring; 27. Positioning groove; 28. Protrusion; 29. ​​Round rod; 210. Slot; 211. Shaft; 212. Coil spring; 213. Block; 214. Protrusion; 215. Sealing ring; 216. Positioning rod; 3. Accessory tube; 4. Retaining ring. Detailed Implementation

[0021] Example 1, as Figure 1-2 As shown, the weld neck loose flange includes a flange 1 and an accessory pipe 3. Several mounting holes are provided on the outer surface of the flange 1, distributed circumferentially. A through hole is located in the middle of the outer surface of the flange 1. A retaining ring 4 is fixedly connected to one end of the accessory pipe 3. The size and shape of the outer surface of the accessory pipe 3 are adapted to the size and shape of the inner wall of the through hole on the outer surface of the flange 1. A reinforcing structure 2 is provided on the outer surface of the accessory pipe 3 to reinforce the welding position between the accessory pipe 3 and the pipe. When connecting two pipes using the weld neck loose flange, the end of one accessory pipe 3 away from the retaining ring 4 is passed through the through hole on the outer surface of the flange 1. The accessory pipe 3 is pushed to move so that one side of the retaining ring 4 fits against the outer surface of the flange 1. Then, the end of the accessory pipe 3 away from the retaining ring 4 is welded to the end face of the pipe. Another set of weld neck loose flanges is then welded to another pipe, aligning the flange 1 positions on the outer sides of the two accessory pipes 3. Fasteners are then passed through the mounting holes on the outer surfaces of the two flanges 1 to connect them, completing the pipe connection.

[0022] Reference Figure 1-5As shown in this embodiment: the reinforcing structure 2 includes a collar 21, with groove blocks 22 fixedly connected to its upper and lower ends respectively. The outer surface of the groove block 22 has through holes of the same specifications as the mounting holes on the outer surface of the flange 1. A groove rod 23 is fixedly connected to one side of the groove block 22. A slider 24 is slidably connected to the inner wall of the groove rod 23. A spring 26 is provided at one end of the slider 24. The two ends of the spring 26 are fixedly connected to one end of the inner wall of the groove rod 23 and one end of the slider 24 respectively. One end of the two sliders 24... A reinforcing ring 25 is fixedly connected to the side. By setting the reinforcing ring 25, when installing the loose flange with welding ring, after the accessory pipe 3 passes through the flange 1, the collar 21 is placed on the outer surface of the accessory pipe 3 at the end of the accessory pipe 3 away from the retaining ring 4. The collar 21 is pushed to move in the direction of the outer surface of the accessory pipe 3 towards the flange 1, so that one side of the collar 21 fits against the outer surface of the flange 1. When welding the accessory pipe 3 to the pipeline, the reinforcing ring 25 is pushed through the two sliders 24 in the direction of the groove block 22 on the inner wall of the groove rod 23. Slide and compress the spring 26 to move the reinforcing ring 25 away from one end of the accessory pipe 3, and then weld it. After welding, release the spring 26, which has been compressed, and push the reinforcing ring 25 back to its original position. Then push the collar 21 to rotate so that the through holes on the outer surface of the two groove blocks 22 are aligned with the mounting holes on the outer surface of the flange 1. When connecting the two flanges 1 with fasteners, the fasteners pass through the groove blocks 22 to tighten the groove blocks 22 on one side of the flange 1. At this time, the reinforcing ring 25 will be outside the weld between the accessory pipe 3 and the pipeline. The reinforcing ring 25 reinforces the outside of the weld between the accessory pipe 3 and the pipeline. By setting the reinforcing structure 2, when using the weld ring loose flange to connect the pipeline, the reinforcing ring 25 is installed outside the weld position between the accessory pipe 3 and the pipeline. The reinforcing ring 25 reinforces the outside of the weld position between the accessory pipe 3 and the pipeline, enhances the load capacity of the connection between the accessory pipe 3 and the pipeline, and improves the strength and service life of the weld ring loose flange.

[0023] Reference Figure 2-5 As shown in this embodiment: a positioning groove 27 is provided on one side of the groove rod 23, and a protrusion 28 is fixedly connected to one side of the slider 24. When the reinforcing ring 25 is pushed to control the movement of the reinforcing ring 25, the protrusion 28 on one side of the slider 24 will slide on the inner wall of the positioning groove 27 on one side of the groove rod 23. The positioning groove 27 and the protrusion 28 can further limit the angle between the slider 24 and the groove rod 23, and prevent the angle between the reinforcing ring 25 and the slider 24 and the groove rod 23 from being skewed. A round rod 29 is fixedly connected to one end of the inner wall of the groove rod 23. The slider 24 slides on the outer surface of the round rod 29. When the slider 24 is pushed to move, the spring 26 will move on the outside of the round rod 29. The round rod 29 can reinforce the internal shape of the spring 26, and prevent the spring 26 from being laterally twisted and folded when compressed, which would affect the normal movement of the reinforcing ring 25 and the slider 24.

[0024] Reference Figure 2-5 As shown in this embodiment: a slot 210 is provided on one side of the groove rod 23, and a rotating shaft 211 is rotatably connected to the top of the protrusion 28. A coil spring 212 is provided at one end of the rotating shaft 211. The two ends of the coil spring 212 are fixedly connected to one side of the rotating shaft 211 and one side of the protrusion 28, respectively. A locking block 213 is fixedly connected to the outer surface of the rotating shaft 211. When welding the accessory tube 3 to the pipeline, during the process of moving the position of the reinforcing ring 25 away from the welding position of the accessory tube 3, the coil spring 212 on the outer surface of the rotating shaft 211 near the slot 210 on the outer surface of the groove rod 23 will drive the rotating shaft 211 and the locking block 213 to rotate in the direction of the groove rod 23, and lock the locking block 213 into the slot 210. This temporarily fixes the position of the protrusion 28 and the slider 24 inside the groove rod 23 and the position of the reinforcing ring 25, making it easier to weld the accessory tube 3 to the pipeline.

[0025] Reference Figure 2-5 As shown in this embodiment: an arc-shaped protrusion 214 is fixedly connected to one side of the top of the locking block 213. After the accessory tube 3 is welded, pinching the arc-shaped protrusion 214 makes it easier to pull the locking block 213 upwards. This controls the locking block 213 to rotate through the rotating shaft 211 and disengage from the slot 210, facilitating the movement of the reinforcing ring 25 back to its original position. A rubber sealing ring 215 is fixedly connected to the end of the reinforcing ring 25 away from the slider 24. The outer surface of the sealing ring 215 is conical. By setting the conical sealing ring 215, it is possible to... The reinforcing ring 25 is fitted onto the outside of the weld between the accessory pipe 3 and the pipeline for further sealing. The end of the groove block 22 away from the collar 21 is fixedly connected to a positioning rod 216. A rubber pad is provided on one side of the positioning rod 216. When the collar 21 is fitted onto the outer surface of the accessory pipe 3, the rubber pad on the outer surface of the positioning rod 216 at one end of the two groove blocks 22 will abut against the outer surface of the flange 1. This makes it easy to tighten the collar 21 on the outside of the flange 1 after the groove block 22 is aligned with the mounting hole position on the outer surface of the flange 1 by rotating the collar 21.

[0026] Working principle: When connecting two pipes using a weld neck flange, the end of an accessory pipe 3 furthest from the retaining ring 4 is passed through the through hole on the outer surface of the flange 1. The accessory pipe 3 is pushed to move so that one side of the retaining ring 4 fits against the outer surface of the flange 1. Then, the end of the accessory pipe 3 furthest from the retaining ring 4 is brought into contact with the end face of the pipe. At the end of the accessory pipe 3 furthest from the retaining ring 4, a collar 21 is fitted onto the outer surface of the accessory pipe 3. The collar 21 is then pushed to move from the outer surface of the accessory pipe 3 towards the flange 1, causing the collar 21 to... One side of the flange 25 is attached to the outer surface of the flange 1. The reinforcing ring 25 is pushed to slide towards the groove block 22 through the two sliders 24 on the inner wall of the groove rod 23 and compress the spring 26, so that the reinforcing ring 25 moves away from one end of the accessory tube 3. During the process of moving the position of the reinforcing ring 25 away from the welding position of the accessory tube 3, the coil spring 212 on the outer surface of the rotating shaft 211 near the groove 210 on the outer surface of the groove rod 23 will drive the rotating shaft 211 and the locking block 213 to rotate towards the groove rod 23, locking the locking block 213. The protrusion 28 and slider 24 are temporarily fixed inside the groove 23, and the position of the reinforcing ring 25 is temporarily fixed. Then, the accessory tube 3 is welded to the pipeline. After the accessory tube 3 is welded, the clamp 213 is pulled upward by pinching the arc-shaped protrusion 214. The clamp 213 is controlled to rotate through the shaft 211 and disengage from the groove 210. The compressed spring 26 returns to its original state and pushes the reinforcing ring 25 to move to its original position. Then, the collar 21 is pushed to rotate so that the through holes on the outer surface of the two groove blocks 22 are aligned with the mounting holes on the outer surface of the flange 1. When the two flanges 1 are connected with fasteners, the fasteners are passed through the groove blocks 22 to tighten the groove blocks 22 on one side of the flange 1. At this time, the reinforcing ring 25 will be outside the weld between the accessory tube 3 and the pipeline. Then, another set of welding ring loose flanges is welded to another pipeline, aligning the flange 1 positions on the outer side of the two accessory tubes 3. The two flanges 1 are connected by fasteners passing through the mounting holes on the outer surface of the two flanges 1, completing the pipeline docking.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A butt-welded ring loose flange, comprising a flange (1) and an accessory pipe (3), characterized in that: The outer surface of the flange (1) is provided with several mounting holes, which are distributed circumferentially on the outer surface of the flange (1). A through hole is provided in the middle of the outer surface of the flange (1). One end of the accessory tube (3) is fixedly connected to a retaining ring (4). The size and shape of the outer surface of the accessory tube (3) are adapted to the size and shape of the inner wall of the through hole on the outer surface of the flange (1). The outer surface of the accessory tube (3) is provided with a reinforcement structure (2) that can reinforce the welding position between the accessory tube (3) and the pipeline.

2. The weld neck loose flange according to claim 1, characterized in that: The reinforcing structure (2) includes a collar (21), with groove blocks (22) fixedly connected to the upper and lower ends of the collar (21). The outer surface of the groove block (22) is provided with through holes of the same specifications as the mounting holes on the outer surface of the flange (1). A groove rod (23) is fixedly connected to one side of the groove block (22). A slider (24) is slidably connected to the inner wall of the groove rod (23). A spring (26) is provided at one end of the slider (24). The two ends of the spring (26) are fixedly connected to one end of the inner wall of the groove rod (23) and one end of the slider (24). A reinforcing ring (25) is fixedly connected to one side of the two sliders (24).

3. The weld neck flange according to claim 2, characterized in that: A positioning groove (27) is provided on one side of the groove rod (23), and a protrusion (28) is fixedly connected to one side of the slider (24).

4. The loose-fitting flange with welding ring according to claim 3, characterized in that: One end of the inner wall of the groove rod (23) is fixedly connected to a round rod (29), and the slider (24) slides on the outer surface of the round rod (29).

5. The loose-fitting flange with welding ring according to claim 4, characterized in that: A slot (210) is provided on one side of the groove rod (23), and a rotating shaft (211) is rotatably connected to the top of the protrusion (28).

6. The weld neck flange according to claim 5, characterized in that: One end of the rotating shaft (211) is provided with a coil spring (212), and the two ends of the coil spring (212) are fixedly connected to one side of the rotating shaft (211) and one side of the protrusion (28), respectively. A locking block (213) is fixedly connected to the outer surface of the rotating shaft (211).

7. The weld neck flange according to claim 6, characterized in that: An arc-shaped protrusion (214) is fixedly connected to one side of the top of the card block (213).

8. The weld neck flange according to claim 6, characterized in that: The reinforcing ring (25) is fixedly connected to a rubber sealing ring (215) at the end away from the slider (24), and the outer surface of the sealing ring (215) is conical.

9. The weld neck flange according to claim 8, characterized in that: The end of the groove block (22) away from the collar (21) is fixedly connected to a positioning rod (216), and a rubber pad is provided on one side of the positioning rod (216).

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