A necked welding flange

Abstract

This utility model provides a weld neck flange, relating to the field of flange technology. The utility model includes a disc body with several mounting holes distributed circumferentially on its outer surface. A neck tube is fixedly connected to one side of the disc body, and a positioning structure is installed on one side of the disc body via fasteners. The positioning structure includes two slotted blocks, with a sliding rod slidably connected to one side of each slotted block. A positioning block is fixedly connected to one end of each sliding rod. By setting up this positioning structure, when welding the flange to a pipe, the two slotted blocks are first installed in opposite positions on one side of the disc body's outer surface. After the pipe is secured to the outside of the neck tube, one side of the positioning block is pressed against the outer surface of the pipe, and the position of the positioning block is tightened. During welding, the two positioning blocks restrict the relative position between the pipe and the neck tube, preventing the pipe from becoming misaligned during welding.

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] A weld neck flange is a type of flange with a tapered neck structure. Pipelines are welded through the neck of the flange. The tapered neck transition structure can effectively disperse stress, enhance the strength and rigidity of the flange-pipe connection, and reduce stress concentration.

[0003] When welding a pipe to a weld neck flange, it is difficult to maintain the angle between the pipe and the flange after aligning the pipe and the neck. The welding precision requirements are high. Even a small deviation during the welding process can affect the overall sealing and strength of the welded flange. Therefore, the existing weld neck flanges are difficult to weld and are prone to deviation after welding, which affects the sealing and strength. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of existing necked welding flanges, which are difficult to weld and prone to misalignment after welding, thus affecting sealing and strength. Therefore, a necked welding flange is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a necked welding flange, comprising a disc body, wherein a plurality of mounting holes are provided on the outer surface of the disc body, the mounting holes being distributed circumferentially on the outer surface of the disc body, a neck tube is fixedly connected to one side of the disc body, and a positioning structure is installed on one side of the disc body by fasteners to position the angle between the pipe connected to the neck tube and the neck tube to prevent skewing.

[0006] Furthermore, the positioning structure includes two slot blocks. The outer surface of the slot blocks has through holes of the same specifications as the mounting holes on the outer surface of the disc. A slide rod is slidably connected to one side of the slot block. A positioning block is fixedly connected to one end of the slide rod. The bottom surface of the positioning block is arc-shaped. A round rod is fixedly connected to the top of the slide rod. The round rod slides on the top of the inner wall of the slot block. A spring is provided at the top of the slide rod. The two ends of the spring are fixedly connected to the top of the slide rod and one side of the slot block, respectively. An L-shaped block is fixedly connected to the top of the slot block. The top of the round rod slides on the inner wall of the L-shaped block. A threaded ring is threadedly connected to the outer surface of the round rod. The threaded ring is located between the slot block and the L-shaped block.

[0007] Furthermore, the outer surface of the neck tube is provided with a plurality of auxiliary grooves, which are arranged on the outer surface of the neck tube.

[0008] Furthermore, a number of protrusions are fixedly connected to the outer surface of the threaded ring, and the protrusions are distributed circumferentially on the outer surface of the threaded ring.

[0009] Furthermore, a reinforcing block is fixedly connected to the outer surface of the slide rod, and the two ends of the reinforcing block are fixedly connected to the side of the slide rod near the groove block and the side of the slide rod near the positioning block, respectively.

[0010] Furthermore, a rubber gasket is fixedly connected to the bottom end of the positioning block.

[0011] Furthermore, a positioning piece is fixedly connected to one side of the groove block, and the outer surface of the positioning piece is arc-shaped.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] In this utility model, by setting a positioning structure, when welding the flange and the pipe, two slotted blocks are first installed in opposite positions on one side of the outer surface of the disc. After the pipe is clamped on the outside of the neck, one side of the positioning block is attached to the outer surface of the pipe and the position of the positioning block is tightened. During the welding process, the two positioning blocks restrict the relative position between the pipe and the neck, so as to prevent the position between the pipe and the neck from deviating during the welding process. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the disc body of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the positioning piece of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the groove block of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the positioning block of this utility model.

[0019] Legend: 1. Disc body; 2. Positioning structure; 21. Groove block; 22. Slide rod; 23. Positioning block; 24. Round rod; 25. Spring; 26. L-shaped block; 27. Threaded ring; 28. Protrusion; 29. ​​Reinforcing block; 210. Washer; 211. Positioning piece; 3. Neck tube; 4. Mounting hole; 5. Auxiliary groove; 6. Fastener. Detailed Implementation

[0020] Example 1, as Figure 1-2As shown, a necked welding flange includes a disc body 1. The outer surface of the disc body 1 has a plurality of mounting holes 4, which are distributed circumferentially on the outer surface of the disc body 1. A neck tube 3 is fixedly connected to one side of the disc body 1. A positioning structure 2 is installed on one side of the disc body 1 by fasteners 6 to position the angle between the pipe connected to the neck tube 3 and the neck tube 3 to prevent skewing.

[0021] Reference Figure 1-5 As shown in this embodiment: the positioning structure 2 includes two slot blocks 21. The outer surface of the slot block 21 has through holes of the same specifications as the mounting holes 4 on the outer surface of the disc body 1. A slide rod 22 is slidably connected to one side of the slot block 21. A positioning block 23 is fixedly connected to one end of the slide rod 22. The bottom surface of the positioning block 23 is arc-shaped. A round rod 24 is fixedly connected to the top of the slide rod 22. The round rod 24 slides on the top of the inner wall of the slot block 21. A spring 25 is provided at the top of the slide rod 22. The two ends of the spring 25 are fixed to the top of the slide rod 22 and one side of the slot block 21, respectively. The connection is as follows: an L-shaped block 26 is fixedly connected to the top of the groove block 21; the top of the round rod 24 slides on the inner wall of the L-shaped block 26; a threaded ring 27 is threadedly connected to the outer surface of the round rod 24; the threaded ring 27 is located between the groove block 21 and the L-shaped block 26; by setting the positioning block 23, when welding the flange to the pipe, first, the two groove blocks 21 are attached to one side of the outer surface of the disc body 1, so that the two groove blocks 21 are in opposite positions on one side of the disc body 1 and the through holes on the outer surface of the groove blocks 21 are aligned with the mounting holes 4 on the outer surface of the disc body 1; then, fasteners 6 are used to pass through. The slot block 21 is installed on the outer surface of the disc body 1 through the through hole on the outer surface of the slot block 21 and the mounting hole 4 on the outer surface of the disc body 1. Then, one end of the pipe is fitted onto the outside of the neck tube 3 on one side of the disc body 1, aligning the center of the pipe with that of the neck tube 3. When the pipe is inserted into the outer surface of the neck tube 3, it contacts one end of the two positioning blocks 23, which pushes the positioning blocks 23 on one side of the slot block 21, causing the slide rod 22 to slide towards the L-shaped block 26 on one side of the slot block 21 and compress the spring 25. After one end of the pipe is fitted tightly onto the outside of the neck tube 3, the spring 25 will push the positioning blocks 23 to... One side of the positioning block 23 is attached to the outer surface of the pipe. When welding is required, the threaded ring 27 on the outer side of the round rod 24 is rotated so that the threaded ring 27 moves in the direction of the L-shaped block 26 on the outer surface of the round rod 24. One side of the threaded ring 27 is pressed against the surface of the L-shaped block 26 so that the round rod 24 and the sliding rod 22 will no longer move. Then the connection between the pipe and the neck pipe 3 is welded. During the welding process, the two positioning blocks 23 restrict the relative position between the pipe and the neck pipe 3 to prevent the position of the pipe from deviating from the neck pipe 3 during the welding process.

[0022] Reference Figure 1-4As shown in this embodiment: several auxiliary grooves 5 are provided on the outer surface of the neck tube 3. The auxiliary grooves 5 are arranged on the outer surface of the neck tube 3. When welding the pipe to the neck tube 3, one end of the pipe is fitted onto the outer surface of the neck tube 3 and locked in the auxiliary groove 5 on the outside of the neck tube 3, which facilitates the centering of the neck tube 3 and the pipe.

[0023] Reference Figure 2-4 As shown in this embodiment: a number of protrusions 28 are fixedly connected to the outer surface of the threaded ring 27. The protrusions 28 are circumferentially distributed on the outer surface of the threaded ring 27. By pressing the protrusions 28 on the outer surface of the threaded ring 27 with your hand, it is easier to push the threaded ring 27 to rotate and it is not easy to slip. A reinforcing block 29 is fixedly connected to the outer surface of the slide rod 22. The two ends of the reinforcing block 29 are fixedly connected to the side of the slide rod 22 near the groove block 21 and the side of the slide rod 22 near the positioning block 23, respectively. By setting the reinforcing block 29, the shape of the outer surface of the slide rod 22 can be reinforced, and the shape of the outer surface of the slide rod 22 can be prevented from deforming due to the force on the bottom end of the positioning block 23. A rubber gasket 210 is fixedly connected to the bottom end of the positioning block 23. By setting the rubber gasket 210, the positioning block 23 fits more tightly and is not easy to slip when it is pressed against the outer surface of the pipe welded to the neck pipe 3.

[0024] Reference Figure 2-4 As shown in this embodiment: a positioning piece 211 is fixedly connected to one side of the slot block 21. The outer surface of the positioning piece 211 is arc-shaped. When the slot block 21 is installed, the inner arc of the positioning block 23 can fit against the edge of the outer surface of the disk body 1, which facilitates quick positioning between the slot block 21 and the disk body 1 and makes it convenient to install the slot block 21.

[0025] Working principle: When welding the flange to the pipe, first, attach the two slotted blocks 21 to one side of the outer surface of the disc body 1, so that the two slotted blocks 21 are in opposite positions on one side of the disc body 1 and the through holes on the outer surface of the slotted blocks 21 are aligned with the mounting holes 4 on the outer surface of the disc body 1. Then, use fasteners 6 to pass through the through holes on the outer surface of the slotted blocks 21 and the mounting holes 4 on the outer surface of the disc body 1 to install the slotted blocks 21 on the outer surface of the disc body 1. Next, fit one end of the pipe onto the outside of the neck tube 3 on one side of the disc body 1, aligning the center of the pipe with the center of the neck tube 3. When the pipe is inserted into the outer surface of the neck tube 3, it contacts one end of the two positioning blocks 23, which pushes the positioning blocks 23 on one side of the two slotted blocks 21, causing the sliding rod 22 to move in an L-shape on one side of the slotted blocks 21. The block 26 slides in the direction of the spring 25 and compresses the pipe. After one end of the pipe is fitted tightly against the outside of the neck 3, the spring 25 will push the positioning block 23 so that one side of the positioning block 23 is in contact with the outer surface of the pipe. When welding is required, the threaded ring 27 on the outside of the round rod 24 is rotated so that the threaded ring 27 moves in the direction of the L-shaped block 26 on the outer surface of the round rod 24. One side of the threaded ring 27 is pressed against the surface of the L-shaped block 26 so that the round rod 24 and the sliding rod 22 will no longer move. Then the connection between the pipe and the neck 3 is welded. During the welding process, the two positioning blocks 23 restrict the relative position between the pipe and the neck 3 to prevent the position of the pipe from deviating from the neck 3 during the welding process.

[0026] 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 necked butt welded flange comprising a disc (1) characterised in that: The outer surface of the disc body (1) is provided with several mounting holes (4), which are distributed in a circle on the outer surface of the disc body (1). A neck tube (3) is fixedly connected to one side of the disc body (1). A positioning structure (2) is installed on one side of the disc body (1) by fasteners (6) to position the angle between the pipe connected to the neck tube (3) and the neck tube (3) to prevent deviation.

2. The necked welding flange according to claim 1, characterized in that: The positioning structure (2) includes two slot blocks (21). The outer surface of the slot block (21) is provided with through holes of the same specifications as the mounting holes (4) on the outer surface of the disc body (1). A slide rod (22) is slidably connected to one side of the slot block (21). A positioning block (23) is fixedly connected to one end of the slide rod (22). The bottom surface of the positioning block (23) is arc-shaped. A round rod (24) is fixedly connected to the top of the slide rod (22). The round rod (24) is located on the top of the inner wall of the slot block (21). The slide rod (22) is equipped with a spring (25) at its top end. The two ends of the spring (25) are fixedly connected to the top end of the slide rod (22) and one side of the groove block (21), respectively. The top end of the groove block (21) is fixedly connected to an L-shaped block (26). The top end of the round rod (24) slides on the inner wall of the L-shaped block (26). The outer surface of the round rod (24) is threaded with a threaded ring (27), which is located between the groove block (21) and the L-shaped block (26).

3. A necked welding flange according to claim 1, characterized in that: The outer surface of the neck tube (3) is provided with a plurality of auxiliary grooves (5), which are arranged on the outer surface of the neck tube (3).

4. A necked welding flange according to claim 2, characterized in that: The outer surface of the threaded ring (27) is fixedly connected with several protrusions (28), which are distributed circumferentially on the outer surface of the threaded ring (27).

5. A necked welding flange according to claim 4, characterized in that: A reinforcing block (29) is fixedly connected to the outer surface of the slide rod (22). The two ends of the reinforcing block (29) are fixedly connected to the side of the slide rod (22) near the groove block (21) and the side of the slide rod (22) near the positioning block (23), respectively.

6. A necked welding flange according to claim 5, characterized in that: A rubber pad (210) is fixedly connected to the bottom end of the positioning block (23).

7. A necked welding flange according to claim 6, characterized in that: A positioning piece (211) is fixedly connected to one side of the groove block (21), and the outer surface of the positioning piece (211) is arc-shaped.

Images