Neck reinforced type butt welding flange pipe fitting

Abstract

The invention relates to the technical field of flange pipe fittings, in particular to a neck reinforced type butt welding flange pipe fitting which comprises a flange plate, a neck pipe is integrally formed at one end of the flange plate, the neck pipe is inserted into one end of a pipeline, the splicing position of the flange plate and the pipeline is welded, an inserting groove is formed in the surface of the flange plate, and a limiting clamping piece is inserted into the surface, close to the pipeline, of the inserting groove. One end of the limiting clamping piece is inserted into the inner wall of the pipeline; a screw-joint inserting ring is inserted into the inserting groove, and the screw-joint inserting ring extrudes and pushes the limiting clamping piece, so that the limiting clamping piece is prevented from retreating; the connecting structure has the beneficial effects that the inserting groove is formed in the surface of the flange plate, the limiting clamping piece is inserted into the inserting groove, one end of the limiting clamping piece is inserted into the inner wall of the pipeline, meanwhile, the limiting clamping piece is squeezed and pushed through the threaded inserting ring, and a clamping position is formed between the neck pipe and the pipeline. When the flange plate and the pipeline are not welded and reinforced, the flange plate can be pre-connected to one end of the pipeline, relative movement of the flange plate and the pipeline is effectively avoided, the accuracy of the welding position is guaranteed, and the welding quality and the pipeline connection stability are improved.

Description

Technical Field

[0001] This invention relates to the field of flange fittings, specifically a neck-reinforced butt-welded flange fitting. Background Technology

[0002] In the field of pipeline connections, weld neck flanges are commonly used connection components. Traditional weld neck flanges typically consist of flanges with bolt holes for connecting two flanges with bolts, thus connecting the pipelines. A neck is also provided on the flange for insertion into the pipeline, and the joint is reinforced by welding.

[0003] However, some problems exist during actual installation. Before welding the flange to the pipeline for reinforcement, there is a lack of effective pre-connection methods. The flange and pipeline rely solely on simple plug-in connections, which easily leads to relative movement, resulting in inaccurate welding positions, affecting welding quality and the stability of the pipeline connection, and increasing installation difficulty and construction time. Therefore, a new neck-reinforced butt-welded flange fitting is needed to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a neck-reinforced butt-welded flange fitting to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a neck-reinforced butt-welded flange fitting, comprising a flange, one end of which is integrally formed with a neck tube, the neck tube being inserted into one end of a pipe, and the flange and the pipe being welded together. The surface of the flange is provided with a slot, and a limiting clip is inserted into the slot near the surface of the pipe, one end of the limiting clip being inserted into the inner wall of the pipe. The slot has a screw-in ring inserted inside. The screw-in ring pushes against the limit switch to prevent the limit switch from moving backward.

[0006] Preferably, the flange surface has multiple bolt holes, and the inner ring surface of the flange is fixed with multiple reinforcing ribs, which are in a ring structure.

[0007] Preferably, the neck tube is a frustum-shaped annular tube, one end of the slot extends into the neck tube, and a rubber ring is fitted and fixed at the end of the neck tube near the flange, with the rubber ring clamped between the neck tube and the pipe.

[0008] Preferably, the slot is an annular groove, and multiple slots are provided on the outer ring surface of the slot. The limiting clips and through holes correspond one-to-one. The limiting clips are inserted into the through holes, and the rubber rings cover the multiple through holes.

[0009] Preferably, the limiting clip includes an insert block, the height of which is greater than the depth of the perforation. One end of the insert block is fixed to the inner ring surface of the rubber ring, and the other end of the insert block is provided with an inclined surface facing the slot of the slot.

[0010] Preferably, the inner ring surface of the screw-in plug is provided with an internal thread, and the inner ring surface of the slot is provided with an external thread. The internal thread and the external thread are connected in a mating manner. When the screw-in plug pushes one end of the plug block into the slot opened in the inner wall of the pipe, the rubber ring is clamped between the plug block and the slot, and the slot is an annular groove.

[0011] Preferably, the end of the screw-in ring facing the outside of the slot has a notch on its outer ring surface. The notch is an annular groove, and a rubber ring is fitted and fixed inside the notch. The thickness of the rubber ring is greater than the depth of the notch.

[0012] Preferably, one end of the screw-in ring has multiple storage slots, which are I-shaped. A lever is inserted into the storage slot, which is T-shaped. A rubber collar is fitted and fixed to one end of the lever that extends into the storage slot. The rubber collar is clamped between the lever and the storage slot and undergoes elastic deformation. A pull ring is fixed to the other end of the lever. After the lever is inserted into the storage slot, the pull ring is located in the opening of the storage slot.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The neck-reinforced butt-welded flange fitting proposed in this invention features a slot on the flange surface into which a limiting clip is inserted. One end of the limiting clip is inserted into the inner wall of the pipe, and a threaded ring pushes the limiting clip to create a locking mechanism between the neck and the pipe. Before the flange and pipe are welded together, the flange can be pre-connected to one end of the pipe, effectively preventing relative movement between them, ensuring accurate welding positions, improving welding quality and pipe connection stability, and reducing installation difficulty and construction time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 This is a schematic diagram of the flange and neck tube connection structure of the present invention; Figure 5 This is a schematic diagram of the screw-in ring structure of the present invention; Figure 6 This is a schematic diagram of the lever structure of the present invention.

[0015] In the diagram: Flange 1, Reinforcing rib 101, Slot 102, Neck 2, Rubber ring 201, Perforation 202, Pipe 3, Slot 301, Insert 4, Bevel 401, Threaded ring 5, Notched groove 501, Rubber ring 502, Storage groove 503, Lever 6, Rubber collar 601, Pull ring 602. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention 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 the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-6 The present invention provides a technical solution: a neck-reinforced butt-welded flange fitting, including a flange 1, the surface of the flange 1 having multiple bolt holes, and the inner ring surface of the flange 1 having multiple reinforcing ribs 101 fixed thereon, the reinforcing ribs 101 having an annular structure; one end of the flange 1 is integrally formed with a neck tube 2, the neck tube 2 is inserted into one end of the pipe 3, and the joint between the flange 1 and the pipe 3 is welded.

[0018] Flanges 1 are installed at the ends of the two pipes 3 that need to be connected. After the neck 2 on the surface of the flange 1 is inserted into the pipe opening of the pipe 3, the joint of the flange 1 and the pipe 3 is welded and fixed together. Then, the two pipes 3 with flanges 1 installed are placed together, and the bolts are passed through the bolt holes on the surface of the flange 1 and tightened. This completes the connection of the two pipes 3.

[0019] To achieve a pre-connection between flange 1 and pipe 3 without welding reinforcement, the following was proposed: The flange 1 has a slot 102 on its surface. A limiting clip is inserted into the slot 102 near the surface of the pipe 3, with one end of the limiting clip inserted into the inner wall of the pipe 3. The neck 2 is a frustum-shaped annular tube. One end of the slot 102 extends into the neck 2. A rubber ring 201 is fitted and fixed at the end of the neck 2 near the flange 1, clamping the neck 2 and the pipe 3. A threaded insert ring 5 is inserted into the slot 102. The threaded insert ring 5 pushes against the limiting clip to prevent it from being positioned. The card retracts; the slot 102 is an annular groove, and multiple slots 102 are provided on the outer ring surface of the slot 102. The limiting card and the through hole 202 correspond one-to-one. The limiting card is inserted into the through hole 202, and the rubber ring 201 covers multiple through holes 202. The limiting card includes a plug 4. The height of the plug 4 is greater than the depth of the through hole 202. One end of the plug 4 is fixed to the inner ring surface of the rubber ring 201, and the other end of the plug 4 is provided with a bevel 401, which faces the slot of the slot 102.

[0020] When the screw-in ring 5 is not inserted into the slot 102, the rubber ring 201 is in its initial state. At this time, one end of the insert block 4 with the inclined surface 401 extends into the slot 102. After the screw-in ring 5 is pushed into the slot 102, the screw-in ring 5 is pushed along the inclined surface 401 to squeeze the insert block 4 into the through hole 202. During this process, one end of the insert block 4 stretches and deforms the rubber ring 201, and clamps the deformed part of the rubber ring 201 in the slot 301. One end of the insert block 4 is inserted into the slot. Within the groove 301, a locking mechanism is formed between the neck 2 and the pipe 3, preventing the neck 2 from being pulled out of the pipe 3, thereby enabling the flange 1 to be pre-connected to one end of the pipe 3. When the locking mechanism needs to be removed, simply pull the threaded insert 5 out of the slot 102. When the threaded insert 5 no longer presses against the insert 4, the rubber ring 201 rebounds and resets the insert 4 into the through hole 202, that is, one end of the insert 4 is pulled out of the groove 301, and the flange 1 is pulled to pull the neck 2 out of the pipe 3.

[0021] To ensure the screw-in ring 5 is securely installed in the slot 102, the following is proposed: The inner ring surface of the screw-in plug 5 is provided with an internal thread, and the inner ring surface of the slot 102 is provided with an external thread. The internal thread and the external thread are connected in a mating manner. When the screw-in plug 5 pushes one end of the plug block 4 into the slot 301 opened in the inner wall of the pipe 3, the rubber ring 201 is clamped between the plug block 4 and the slot 301. The slot 301 is an annular groove. The end of the screw-in plug 5 facing the outside of the slot 102 has a notch 501 opened on the outer ring surface. The notch 501 is an annular groove. A rubber ring 502 is fixed inside the notch 501. The thickness of the rubber ring 502 is greater than the depth of the notch 501.

[0022] The screw-in ring 5 is installed in the slot 102 by screwing to prevent the screw-in ring 5 from falling out of the slot 102 at will, thereby ensuring that the screw-in ring 5 stably pushes the plug block 4; and after the two flanges 1 are locked and fixed by bolts, the rubber ring 502 between the two sets of screw-in rings 5 ​​acts as a sealing structure.

[0023] To facilitate the turning of the screw-in ring 5 in the slot 102, the following was proposed: One end of the screw-in ring 5 has multiple storage slots 503, which are in the shape of an "I" shaped groove. A lever 6 is inserted into the inside of the storage slot 503. The lever 6 is in the shape of a "T" shaped rod. A rubber collar 601 is fitted and fixed to one end of the lever 6 that extends into the storage slot 503. The rubber collar 601 is clamped between the lever 6 and the storage slot 503 and undergoes elastic deformation. A pull ring 602 is fixed to the other end of the lever 6. After the lever 6 is inserted into the storage slot 503, the pull ring 602 is located in the groove of the storage slot 503.

[0024] When it is necessary to unscrew and remove the screw-in ring 5 from the slot 102, squeeze the pull ring 602 to pull the lever 6 outwards towards the storage slot 503. Squeezing the lever 6 will cause the screw-in ring 5 to be unscrewed and removed from the slot 102.

[0025] This neck-reinforced weld neck flange fitting is mainly used for pipe connections. It achieves a stable connection between two pipes through pre-connection and welding reinforcement. The specific usage method is as follows: Insert the neck tube 2 on the surface of flange 1 into the opening of the pipe 3 to be connected. The neck tube 2 is a frustum-shaped ring. A rubber ring 201 is fitted and fixed at the end of the neck tube 2 near flange 1, at which point the rubber ring 201 is in its initial state. A slot 102 is provided on the surface of flange 1. A limiting clip is provided on the surface of slot 102 near pipe 3. The limiting clip includes a plug 4. The height of plug 4 is greater than the depth of the through hole 202. One end of plug 4 is fixed to the inner ring surface of rubber ring 201, and the other end has a bevel 401 facing the opening of slot 102. At this time, the end of plug 4 with bevel 401 extends into slot 102. Push the threaded ring 5 into slot 102. Since the inner ring surface of threaded ring 5 has internal threads and the inner ring surface of slot 102 has external threads, the threaded ring 5 is installed in slot 102 by the engagement of the internal and external threads, preventing the threaded ring 5 from falling out of slot 102. During the insertion process, the screw-in ring 5 pushes the insert 4 into the through hole 202 along the inclined surface 401 of the insert 4. One end of the insert 4 stretches the rubber ring 201, deforming it, and inserts the deformed part of the rubber ring 201 and one end of the insert 4 into the groove 301 opened in the inner wall of the pipe 3. The groove 301 is an annular groove, and the rubber ring 201 is clamped between the insert 4 and the groove 301. This creates a locking position between the neck 2 and the pipe 3, preventing the neck 2 from being pulled out of the pipe 3, and achieving the pre-connection of the flange 1 to one end of the pipe 3. Following the above pre-connection operation, the flange 1 is also installed at the end of the other pipe 3 that needs to be connected. The two pipes 3 with flanges 1 installed are brought together, and the bolts are passed through the bolt holes on the surface of the flange 1 and tightened, completing the initial connection of the two pipes 3. At this point, the rubber ring 502 between the two sets of screw-in rings 5 ​​acts as a sealing structure. The end of the screw-in ring 5 facing the outside of the slot 102 has a notch 501 on its outer ring surface. The notch 501 is an annular groove, and a fixed rubber ring 502 is fitted inside the notch 501, with a thickness greater than the depth of the notch 501. The joint between the flange 1 and the pipe 3 is then welded and fixed to further enhance the stability of the connection.

[0026] To disassemble the pre-connected structure: One end of the screw-in ring 5 has multiple I-shaped storage slots 503. A T-shaped lever 6 is inserted into each slot 503. A rubber collar 601 is fitted and fixed to one end of the lever 6 that extends into the slot 503. The rubber collar 601 elastically deforms between the lever 6 and the slot 503. A pull ring 602 is fixed to the other end of the lever 6. After the lever 6 is inserted into the slot 503, the pull ring 602 is positioned within the slot opening. Squeezing the pull ring 602 pulls the lever 6 outwards from the slot 503. Squeezing the pulled-out lever 6 causes the screw-in ring 5 to screw into the slot 102, thus removing the screw-in ring 5 from the slot 102. When the screw-in ring 5 no longer presses against the insert 4, the rubber ring 201 rebounds and resets the insert 4 into the through hole 202, that is, one end of the insert 4 is pulled out from the slot 301. At this time, the flange 1 can be pulled to pull the neck pipe 2 out of the pipe 3.

[0027] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A neck-reinforced butt-welded flange fitting, comprising a flange (1), one end of which is integrally formed with a neck (2), the neck (2) being inserted into one end of a pipe (3), and the flange (1) and the pipe (3) being welded together, characterized in that: The flange (1) has a slot (102) on its surface. A limit clamp is inserted into the slot (102) near the surface of the pipe (3). One end of the limit clamp is inserted into the inner wall of the pipe (3). A screw-in ring (5) is inserted into the slot (102). The screw-in ring (5) pushes the limit card to prevent the limit card from moving backward.

2. The neck-reinforced butt-welded flange fitting according to claim 1, characterized in that: The flange (1) has multiple bolt holes on its surface and multiple reinforcing ribs (101) are fixed on the inner ring surface of the flange (1). The reinforcing ribs (101) are in the form of a ring structure.

3. The neck-reinforced butt-welded flange fitting according to claim 1, characterized in that: The neck tube (2) is a frustum-shaped ring tube. One end of the slot (102) extends into the neck tube (2). A rubber ring (201) is fitted and fixed at the end of the neck tube (2) near the flange (1). The rubber ring (201) is clamped between the neck tube (2) and the pipe (3).

4. A neck-reinforced butt-welded flange fitting according to claim 3, characterized in that: The slot (102) is an annular groove. Multiple slots (102) are provided on the outer ring surface of the slot (102). The limiting card and the through hole (202) correspond one-to-one. The limiting card is inserted into the through hole (202), and the rubber ring (201) covers multiple through holes (202).

5. A neck-reinforced butt-welded flange fitting according to claim 3, characterized in that: The limiting clip includes a plug (4), the height of which is greater than the depth of the through hole (202). One end of the plug (4) is fixed to the inner ring surface of the rubber ring (201), and the other end of the plug (4) is provided with a bevel (401) facing the slot (102).

6. A neck-reinforced butt-welded flange fitting according to claim 5, characterized in that: The inner ring surface of the screw-in plug (5) is provided with an internal thread, and the inner ring surface of the slot (102) is provided with an external thread. The internal thread and the external thread are connected in a mating manner. When the screw-in plug (5) pushes one end of the plug block (4) into the slot (301) opened on the inner wall of the pipe (3), the rubber ring (201) is clamped between the plug block (4) and the slot (301). The slot (301) is an annular groove.

7. A neck-reinforced butt-welded flange fitting according to claim 1, characterized in that: The screw-in ring (5) has a notch (501) on its outer ring surface at one end facing the outside of the slot (102). The notch (501) is an annular groove, and a rubber ring (502) is fixed inside the notch (501). The thickness of the rubber ring (502) is greater than the depth of the notch (501).

8. A neck-reinforced butt-welded flange fitting according to claim 1, characterized in that: One end of the screw-in ring (5) is provided with multiple storage slots (503). The storage slots (503) are in the shape of an "I". A lever (6) is inserted into the inside of the storage slot (503). The lever (6) is in the shape of a "T". A rubber collar (601) is sleeved and fixed at one end of the lever (6) that extends into the storage slot (503). The rubber collar (601) is clamped between the lever (6) and the storage slot (503) and produces elastic deformation. A pull ring (602) is fixed at the other end of the lever (6). After the lever (6) is inserted into the storage slot (503), the pull ring (602) is in the groove of the storage slot (503).

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