KR-102964186-B1 - Piping Joint

Abstract

The present invention relates to a pipe joint that is installed at a pipe connection to block leakage, reduces the thickness of a sleeve inserted into a pipe, prevents damage to a rubber ring for sealing, and can completely block leakage through multiple sealing. A pipe joint for butting a pair of pipes (100) connected by a flange (110), comprising: a sleeve (10) formed with a diameter larger than that of the pipe (100), inserted into the outer side of the butting pipe (100), and having a curling portion (15) formed at each of the expanded ends; a pair of lug flanges (20) inserted into the pipe (100), having a plurality of through holes (21) formed on the outer side, and being in close contact with the end of the sleeve (10); and a pair of multi-sealing rubber rings (30) formed with an inclined surface, one side of which is inserted into the lug flange (20) and the other side of which is inserted into the inner side of the expanded portion of the sleeve (10) and is in close contact, having a plurality of protrusions (31) formed at regular intervals on the inclined surface, and fitted into the pipe (100). It is characterized by comprising a plurality of fixing bolts (40) and fixing nuts (45) that maintain airtightness by adjusting the gap between the two lug flanges (20) using the through hole (21) of the above lug flange (20) to press the multi-sealing rubber ring (30) against the inner side of the expanded portion of the sleeve (10).

Inventors

• 이철중
• 오봉희

Dates

Publication Date

20260512

Application Date

20230518

Claims (7)

1. In a pipe joint that butts a pair of pipes (100) connected by a flange (110), A sleeve (10) formed with a larger diameter than the above pipe (100), inserted into the outer side of the butted pipe (100), and having curling portions (15) formed at each of the expanded ends; A pair of lug flanges (20) inserted into the above pipe (100), having a plurality of through holes (21) formed on the outer side, and in close contact with the end of the sleeve (10); A pair of multi-sealing rubber rings (30) that are fitted into a pipe (100), each having an inclined surface on one side that is inserted into a lug flange (20) and on the other side that is inserted into and closely fitted to the inner side of the expanded portion of a sleeve (10), with a plurality of protrusions (31) formed at regular intervals on the inclined surface; It comprises a plurality of fixing bolts (40) and fixing nuts (45) that maintain airtightness by adjusting the gap between the two lug flanges (20) using the through hole (21) of the lug flange (20) to press the multi-sealing rubber ring (30) against the inner side of the expanded portion of the sleeve (10). An eye nut (50) equipped with a hook for lifting is installed in the middle part of the sleeve (10), and A stopper (56) made of a stud bolt is fastened to the eye nut (50), and A pipe joint characterized in that a concave groove (32) is formed in each of the protrusions (31) of the multi-sealing rubber ring (30).
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Description

Piping Joint The present invention relates to a pipe joint installed at a pipe connection to block leakage, and more specifically, to a pipe joint capable of completely blocking leakage through multiple sealing by reducing the thickness of a sleeve inserted into a pipe and preventing damage to a rubber ring for sealing. Generally, various pipes are connected and installed in architectural structures such as industrial plants, buildings, or apartments to transport fluids necessary for daily life, such as cold and hot water or gas, or domestic wastewater, to their respective destinations. Commonly used pipe connection methods include direct connection by welding the joints of pipes, connection by forming flanges at the ends of pipes, and pipe connection using sleeves inserted into the pipes. However, the method of connecting pipes through welding has the disadvantage that welding takes a long time, and there is a high possibility of thermal deformation of the pipes due to the high heat generated during the welding process. The method of connecting pipes using flanges has the disadvantage that when the diameter of the pipe is large, the number of through holes increases, and since bolts and nuts must be fastened to each through hole, the connection work takes a long time. In addition, the pipe connection method using a sleeve involves inserting pipes into both sides of the sleeve and placing a sealing material between the pipes and the sleeve, but the sleeve can penetrate the sealing material, causing damage to the sealing material and leakage due to the single-stage sealing, and there is a problem that the sleeve must be made thick to maintain the operating pressure. Meanwhile, as a result of investigating the prior art related to the present invention, numerous patent documents were found, some of which are introduced below. Patent Document 1 discloses a pipe connection joint that includes: a sealing member interposed between contact surfaces where the flanges of each pipe are in close contact with each other and simultaneously in contact with the inner surface and outer circumference of the flanges, for connecting a plurality of pipes in which flanges are integrally formed at the ends; a plurality of elastic members symmetrically arranged to simultaneously in contact with the flanges and the sealing member while wrapping the outer surface of the flanges attached to each side of the sealing member; and a plurality of joint members symmetrically arranged to press toward the flanges while wrapping the outer surface of the elastic members from the outside of the flanges of each pipe and connected by bolts and nuts, thereby ensuring very strong bonding strength and excellent sealing without welding during the pipe connection process, and at the same time, greatly improving the convenience of assembly. Patent Document 2 discloses a slip joint for piping that is configured such that, in the event of fluid leakage occurring due to wear of the packing sealing the slip housing and the slip pipe during long-term use, the slip pipe inserted therein is slidably inserted back and forth within the interior of the slip housing, a plurality of packings are inserted between the inner surface of the slip housing and the outer surface of the slip pipe with a packing compression ring interposed therebetween, and a packing pressure member for pressurizing the plurality of packings inserted between the inner surface of the slip housing and the outer surface of the slip pipe is coupled to the rear end of the slip housing by a packing pressure bolt, thereby making maintenance easier and significantly improving durability. Patent Document 3 discloses a pipe joint capable of effectively sealing and joining a bending connection portion of a pipe connected at an angle that cannot be accommodated by conventional standard elbows, comprising: a joint body formed in a tubular shape of a certain length and having first and second flanges at both ends, with annular fitting grooves formed at the inner diameter edges of each of the first and second flanges; first and second connecting rings coupled to both ends of the joint body, with annular fitting grooves formed at the inner diameter edges of each, and the fitting grooves corresponding to the fitting grooves of the first and second flanges; and annular first and second sealing members interposed between the fitting grooves of the first and second flanges of the joint body and the fitting grooves of the first and second connecting rings. Patent Document 4 discloses a pipe connection joint that includes: a sealing member interposed between the contact surfaces of the flanges of each pipe, which are in close contact with each other, and simultaneously in contact with the inner surface and the outer circumference of the flanges, for connecting a plurality of pipes in which flanges are integrally formed at the ends; a plurality of elastic members symmetrically arranged to simultaneously in conta