Butt welding flange

Abstract

The utility model discloses a welding neck flange which comprises a flange plate body, the flange plate body is composed of an installation plate and a welding pipe, a groove is formed in the welding pipe, a protective sleeve is movably installed in the groove, the inner diameter of the protective sleeve is larger than the outer diameter of the welding pipe, and an inner ring making contact with the groove is arranged on the protective sleeve. The protective sleeve is slidably connected into the groove through the inner ring, a plurality of sets of threaded holes are formed in the protective sleeve, and a fixing bolt is in threaded connection with the interior of each set of threaded holes. According to the utility model, the protective sleeve is arranged and can freely move in the groove, so that after the flange and the pipeline are welded, the protective sleeve can be moved to the welding part to carry out closed protection on the welding part, and as the inner diameter of the protective sleeve is greater than the outer diameter of the welding pipe, the welding part can be prevented from being damaged. In this way, even if some protrusions are arranged at the welding position, the using function of the device cannot be affected, welding slag generated by welding cannot affect using of the device, and using reliability is good.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically a butt-welding flange. Background Technology

[0002] A flange is a pipe fitting used for connecting pipes. It is usually made of materials such as stainless steel, carbon steel, and alloy steel. It has a round or square shape with a hole in the middle to install bolts and gaskets, connecting two pipes or valves to achieve sealing and fixing of the pipeline system. It is widely used in industries such as chemical, petroleum, natural gas, water supply and drainage, construction, and pharmaceutical.

[0003] A search revealed a utility model patent with publication number CN219102304U, which discloses a welding flange comprising a disc with a through hole. A cylinder is coaxially mounted on one side of the disc, corresponding to the through hole. An annular groove is coaxially provided on the outer wall of the end of the cylinder away from the disc, and a threaded protrusion is provided on the outer wall of the end of the cylinder near the disc along the length of the cylinder. A sleeve is coaxially provided on the end of the cylinder away from the disc, with the inner diameter of the sleeve corresponding to the outer diameter of the cylinder, and a threaded groove is provided on the inner wall of the end of the sleeve near the disc along the length of the sleeve.

[0004] However, the above design has shortcomings. It uses a threaded connection to move and fix the sleeve. Because the threaded area is close to the flange and pipe welding points, weld slag can easily splash onto the threads, causing damage. Once the threads are damaged, the sleeve's functionality will be affected, requiring the entire flange to be replaced. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a welding flange to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a butt-welding flange, comprising a flange body, the flange body being composed of an mounting plate and a welding pipe, the welding pipe having a groove, a protective sleeve being movably installed inside the groove, the inner diameter of the protective sleeve being larger than the outer diameter of the welding pipe, the protective sleeve having an inner ring that contacts the groove, and being slidably connected inside the groove through the inner ring, the protective sleeve having multiple sets of threaded holes, each set of threaded holes having a fixing bolt threadedly connected inside.

[0007] The protective sleeve has a first sealing ring and a sealing gasket fixedly connected inside, with the sealing gasket being disposed on the inner ring of the protective sleeve.

[0008] The mounting plate has a mounting groove, and a sealing sleeve is fixedly connected inside the mounting groove. The width of the sealing sleeve is greater than the width of the mounting groove.

[0009] The mounting plate has multiple sets of mounting holes, and the welding pipe has a welding slope.

[0010] The mounting plate has multiple sets of sockets, and multiple sets of plug rods that match the sockets are fixedly connected to the mounting plate.

[0011] The insertion holes and insertion rods are alternately arranged on both sides of the mounting hole.

[0012] The mounting plate has an annular groove, and a second sealing ring is provided inside the annular groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model features a protective sleeve that can move freely within the groove. After welding the flange to the pipe, the protective sleeve can be moved to the welding point to seal and protect the welded area. Since the inner diameter of the protective sleeve is larger than the outer diameter of the welded pipe, even if there are slight protrusions at the welding point, it will not affect its functionality. Furthermore, the welding slag produced during welding will not affect its use, resulting in good reliability. The protective sleeve can be fixed by the threaded holes and fixing bolts, making it simple, convenient, and effective to use. Attached Figure Description

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

[0016] Figure 2 This is a side view of a welding flange according to the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the flange body in a welding flange according to the present invention.

[0018] Figure 4 This is a cross-sectional view of a sealing sleeve in a welding flange according to the present invention;

[0019] Figure 5 This is a cross-sectional view of a protective sleeve in a welding flange according to the present invention.

[0020] In the picture:

[0021] 1. Flange body; 2. Mounting hole; 3. Groove; 4. Protective sleeve; 5. Fixing bolt; 6. First sealing ring; 7. Sealing gasket; 8. Mounting groove; 9. Sealing sleeve; 10. Annular groove; 11. Second sealing ring; 12. Insertion hole; 13. Insert rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a butt-welding flange, including a flange body 1, which is composed of an mounting plate and a welding pipe. The welding pipe has a groove 3, and a protective sleeve 4 is movably installed inside the groove 3. The protective sleeve 4 can move freely inside the groove 3. The inner diameter of the protective sleeve 4 is larger than the outer diameter of the welding pipe, so that a certain gap is left between the protective sleeve 4 and the welding pipe to facilitate the movement of the protective sleeve 4 and avoid the protrusion at the weld point affecting its movement. The protective sleeve 4 is provided with an inner ring that contacts the groove 3 and is slidably connected inside the groove 3 through the inner ring. The inner ring can improve the stability of the protective sleeve 4 and prevent it from falling out of the groove 3. The protective sleeve 4 has multiple sets of threaded holes, and each set of threaded holes is threaded with a fixing bolt 5. By tightening the fixing bolt 5, the protective sleeve 4 can be fixed.

[0024] The protective sleeve 4 is fixedly connected to a first sealing ring 6 and a sealing gasket 7. The sealing gasket 7 is set on the inner ring of the protective sleeve 4. The first sealing ring 6 can contact the outer wall of the welded pipe during use, which can further ensure the protective effect of the protective sleeve 4. The sealing gasket 7 can contact the side wall of the groove 3 during installation, so that it fits more tightly.

[0025] The mounting plate has a mounting groove 8, and a sealing sleeve 9 is fixedly connected inside the mounting groove 8. The width of the sealing sleeve 9 is greater than the width of the mounting groove 8. The sealing sleeve 9 can seal the mounting area after the two flanges are connected.

[0026] The flange has multiple sets of mounting holes 2 and a welding bevel on the welded pipe. The mounting holes 2 facilitate the installation of the flange, and the welding bevel is chamfered to facilitate welding to the pipe and ensure welding strength.

[0027] The mounting plate has multiple sets of insertion holes 12, and multiple sets of insertion rods 13 that match the insertion holes 12 are fixedly connected to the mounting plate. The insertion holes 12 and insertion rods 13 are alternately arranged on both sides of the mounting hole 2. When the two flanges are connected, the insertion holes 12 and insertion rods 13 can play a preliminary limiting role to facilitate the fixing of the flanges.

[0028] The mounting plate has an annular groove 10, and a second sealing ring 11 is provided inside the annular groove 10. The annular groove 10 and the second sealing ring 11 can make the connection between the two flanges more reliable and prevent gaps from being left.

[0029] Working principle: In use, the flange can be welded to the pipeline. After welding, the protective sleeve 4 can be moved to the weld to seal and protect the welded part from external influences. After moving, tightening the fixing bolts 5 can fix the protective sleeve 4, which is quite convenient. The first sealing ring 6 on the protective sleeve 4 can contact the outer wall of the welded pipeline to ensure its sealing effect. When connecting and installing two flanges, the insertion holes 12 and insertion rods 13 on the two flanges can be aligned and inserted. This can limit the position of the two flanges to facilitate subsequent installation and improve installation accuracy.

[0030] 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 welding flange, comprising a flange body (1), said flange body (1) being composed of a mounting plate and a welding pipe, characterized in that: The welded pipe has a groove (3) and a protective sleeve (4) is movably installed inside the groove (3). The inner diameter of the protective sleeve (4) is larger than the outer diameter of the welded pipe. The protective sleeve (4) has an inner ring that contacts the groove (3) and is slidably connected to the inside of the groove (3) through the inner ring. The protective sleeve (4) has multiple sets of threaded holes, and each set of threaded holes is threaded with a fixing bolt (5).

2. The welding flange according to claim 1, characterized in that: The protective sleeve (4) is fixedly connected to a first sealing ring (6) and a sealing gasket (7), and the sealing gasket (7) is set on the inner ring of the protective sleeve (4).

3. A welding flange according to claim 1, characterized in that: The mounting plate has a mounting groove (8), and a sealing sleeve (9) is fixedly connected inside the mounting groove (8). The width of the sealing sleeve (9) is greater than the width of the mounting groove (8).

4. A welding flange according to claim 1, characterized in that: The mounting plate has multiple sets of mounting holes (2), and the welding pipe has a welding slope.

5. A welding flange according to claim 4, characterized in that: The mounting plate has multiple sets of sockets (12), and multiple sets of plug rods (13) that match the sockets (12) are fixedly connected to the mounting plate.

6. A welding flange according to claim 5, characterized in that: The insertion hole (12) and the insertion rod (13) are alternately arranged on both sides of the mounting hole (2).

7. A welding flange according to claim 1, characterized in that: The mounting plate has an annular groove (10), and a second sealing ring (11) is provided inside the annular groove (10).

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