A plumbing sealing butt joint structure

Abstract

The utility model discloses a kind of water supply and drainage pipe sealing butt joint structure, including the first end and second end of butt joint, the first end and second end are connected by connecting flange, the first end face and second end face are symmetrically provided with sealing mechanism, the sealing mechanism includes first groove body, second groove body and first sealing ring, the first groove body section is L type, the first sealing ring includes the embedding portion and sealing portion of L type distribution, the embedding portion is embedded into the horizontal section of first groove body, the sealing portion is embedded into the vertical section of first groove body, the sealing portion outside two ends are respectively provided with extrusion lug and expansion lug, the second groove body is communicated with first groove body and located the horizontal section back to vertical section side.The utility model has the advantages that: fourfold sealing is formed by the butt joint of two first sealing rings, and the sealing property of butt joint can be ensured without setting multiple sealing rings.

Description

Technical Field

[0001] This utility model relates to the field of drainage construction technology, and in particular to a sealing connection structure for water supply and drainage pipes. Background Technology

[0002] Water supply pipeline construction encompasses the entire process, including pipeline alignment, trench excavation, pipe laying, jointing, backfilling, pressure testing, flushing, disinfection, and site cleaning. A crucial aspect is the sealing connection between pipes. During pipeline assembly, butt-joint sealing structures are required to ensure a tight seal at the pipe joints.

[0003] To ensure a tight seal, existing water supply and drainage pipe connection structures typically incorporate multiple sealing rings and plug-in structures on the pipe ends to create a multi-layered seal after connection. For example, utility model patent CN222479773U uses a plug-in structure consisting of a first sealing ring, a second sealing ring, a fixing post, and a positioning hole to achieve multiple seals. However, the multiple sealing rings are cumbersome, and the plug-in structure is easily damaged by impacts during pipe transportation. Summary of the Invention

[0004] This utility model mainly solves the above-mentioned problems and provides a sealing and docking structure for water supply and drainage pipes, which sets a single sealing ring on the end face and achieves multiple seals by docking two sealing rings.

[0005] The technical solution adopted by this utility model to solve its technical problem is a sealing and docking structure for water supply and drainage pipes, including a first end and a second end for docking. The first end and the second end are connected by a connecting flange. A sealing mechanism is centrally symmetrically arranged on the end faces of the first end and the second end. The sealing mechanism includes a first groove, a second groove, and a first sealing ring. The first groove has an L-shaped cross-section. The first sealing ring includes an embedded part and a sealing part distributed in an L-shape. The embedded part is embedded in the horizontal section of the first groove, and the sealing part is embedded in the vertical section of the first groove. The outer ends of the sealing part are respectively provided with extrusion protrusions and expansion protrusions. The second groove is connected to the first groove and is located on the side of the horizontal section away from the vertical section.

[0006] As a preferred embodiment of the above solution, the extrusion protrusion is located at the end of the sealing portion near the embedding portion, and the expansion protrusion is located at the end of the sealing portion away from the embedding portion.

[0007] As a preferred embodiment of the above solution, the sealing part has a vertically extending first cavity inside, and the expansion protrusion has a second cavity, with the first cavity and the second cavity being connected.

[0008] As a preferred embodiment of the above scheme, the cavity formed by the first cavity and the second cavity is L-shaped.

[0009] As a preferred embodiment of the above solution, when the first end and the second end are connected, the extrusion protrusion of the first sealing ring in the first end abuts against the middle of the sealing portion of the first sealing ring in the second end, and the extrusion protrusion of the first sealing ring in the second end abuts against the middle of the sealing portion of the second sealing ring in the first end, and the expansion protrusion extends into the second groove.

[0010] As a preferred embodiment of the above scheme, the connecting flanges on the first end and the second end are connected by bolts.

[0011] The advantages of this invention are: during docking, the compression protrusion of the first sealing ring in the first end and the middle of the sealing part of the first sealing ring in the second end form a first seal. The expansion protrusion of the first sealing ring in the first end expands under the action of internal air pressure and the second groove and fills the second groove, abutting against the compression protrusion of the first sealing ring in the second end to form a second seal. Similarly, the compression protrusion and expansion protrusion of the first sealing ring in the second end each form a seal, that is, the docking of the two first sealing rings forms a quadruple seal, which can ensure the sealing performance of the docking without setting multiple sealing rings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the water supply and drainage pipe sealing connection structure in the embodiment when it is not connected.

[0013] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.

[0014] Figure 3 This is a schematic diagram of the sealing connection structure of the water supply and drainage pipes in the embodiment.

[0015] Figure 4 for Figure 3 A magnified view of a portion of region B in the middle.

[0016] 1-Connecting flange 2-First sealing ring 3-Embedded part 4-Sealing part 5-First cavity 6-Expansion protrusion 7-Extrusion protrusion 8-Second cavity 9-Second groove. Detailed Implementation

[0017] The technical solution of this utility model will be further described below through embodiments and in conjunction with the accompanying drawings.

[0018] Example: This embodiment describes a sealing connection structure for water supply and drainage pipes, such as... Figure 1 and Figure 2As shown, the device includes a first end and a second end that are joined together. The first end and the second end are connected by a connecting flange 1, and the connecting flanges are connected by bolts. A sealing mechanism is centrally symmetrically arranged on the first end face and the second end face. The sealing mechanism includes a first groove, a second groove 9, and a first sealing ring 2. The first groove has an L-shaped cross-section. The first sealing ring 2 includes an L-shaped embedded part 3 and a sealing part 4. The embedded part 3 is embedded in the horizontal section of the first groove, and the sealing part 4 is embedded in the vertical section of the first groove. The outer ends of the sealing part 4 are respectively provided with extrusion protrusions 7 and expansion protrusions 6. The second groove 9 is connected to the first groove and is located on the side of the horizontal section facing away from the vertical section.

[0019] The compression protrusion 7 is located at the end of the sealing part 4 near the embedded part 3, and the expansion protrusion 6 is located at the end of the sealing part 4 away from the embedded part 3. The sealing part 4 has a vertically extending first cavity 5, and the expansion protrusion 6 has a second cavity 8. The first cavity 5 and the second cavity 8 are connected. The cavity formed by the first cavity 5 and the second cavity 8 is L-shaped.

[0020] like Figure 3 and Figure 4 As shown, when the first end and the second end are connected, the compression protrusion 7 of the first sealing ring in the first end abuts against the middle of the sealing portion of the first sealing ring in the second end to form a first seal and compress the air in the first cavity of the first sealing ring in the second end into the second cavity. The increased air pressure in the second cavity causes the expansion protrusion 6 to expand, and the expansion protrusion 6 extends into the second groove of the first end. Under the constraint of the second groove, the expansion protrusion 6 can only expand towards the compression protrusion side of the first sealing ring in the first end, so that the expansion protrusion 6 of the first sealing ring in the second end and the first sealing portion of the first sealing ring in the first end... The compression protrusion 7 of the first sealing ring abuts against each other to form a second seal. Similarly, the compression protrusion of the first sealing ring in the second end abuts against the middle of the sealing part of the first sealing ring in the first end to form a third seal. The expansion protrusion of the first sealing ring in the first end expands. The expanded expansion protrusion, under the constraint of the second groove, abuts against the compression protrusion of the first sealing ring in the second end to form a fourth seal. That is, in this embodiment, four seals are formed by two first sealing rings and the second groove. Only one sealing ring needs to be set on each end face. The sealing performance of the docking can be ensured without setting multiple sealing rings.

[0021] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A sealing connection structure for water supply and drainage pipes, comprising a first end and a second end for connection, characterized in that: The first end and the second end are connected by a connecting flange. A sealing mechanism is centrally symmetrically arranged on the end faces of the first end and the second end. The sealing mechanism includes a first groove, a second groove, and a first sealing ring. The first groove has an L-shaped cross-section. The first sealing ring includes an embedded part and a sealing part distributed in an L-shape. The embedded part is embedded in the horizontal section of the first groove, and the sealing part is embedded in the vertical section of the first groove. The sealing part has a pressing protrusion and an expansion protrusion at its two outer ends, respectively. The second groove is connected to the first groove and is located on the side of the horizontal section away from the vertical section.

2. The sealing connection structure for water supply and drainage pipes according to claim 1, characterized in that: The extrusion protrusion is located at the end of the sealing portion near the embedded portion, and the expansion protrusion is located at the end of the sealing portion away from the embedded portion.

3. The sealing connection structure for water supply and drainage pipes according to claim 1 or 2, characterized in that: The sealing part has a vertically extending first cavity inside, and the expansion protrusion has a second cavity, with the first cavity and the second cavity connected.

4. The sealing connection structure for water supply and drainage pipes according to claim 3, characterized in that: The cavity formed by the first cavity and the second cavity is L-shaped.

5. The sealing connection structure for water supply and drainage pipes according to claim 1, characterized in that: When the first end and the second end are connected, the extrusion protrusion of the first sealing ring in the first end abuts against the middle of the sealing part of the first sealing ring in the second end, and the extrusion protrusion of the first sealing ring in the second end abuts against the middle of the sealing part of the second sealing ring in the first end, and the expansion protrusion extends into the second groove.

6. The sealing connection structure for water supply and drainage pipes according to claim 1, characterized in that: The connecting flanges on the first and second ends are connected by bolts.

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