KR200275026Y1 - Pipe coupling - Google Patents

Abstract

The present invention relates to a coupling used for connecting various pipes, such as industrial pipes, water and sewage pipes, oil pipes, and drainage pipes, and is used to connect the connections of both pipes 11 and 12, and has an annular jaw ( An inner ring (22a) having pipe insertion holes (22b, 22c) for fitting the opposite ends of the connection portions of the pipes (11, 12) to both sides of the annular jaw (22a); The connection ring 22 has an insertion hole 24a, 26a penetrated in the center and a sealing member pressing surface 24b, 26b tapered at the insertion hole 24a for insertion into the pipes 11 and 12, respectively. An outer ring 24 and 26 respectively disposed at both sides of the outer ring; An elastically deformable ring seal inserted into the pipes 11 and 12 and interposed between the inner ring 22 and one outer ring 24 and the inner ring 22 and the other outer ring 26, respectively. Press the members 28 and 30 and the sealing members 28 and 30 so that the outer rings 24 and 26 are pressed against the corresponding contact portions of the inner ring 22 and the outer rings 24 and 26. Characterized by including a tightening means for tightening each other.

Description

Pipe coupling

The present invention relates to a coupling used for connecting various pipes, such as industrial pipes, water and sewage pipes, oil pipes, and drainage pipes, and more particularly, to a pipe coupling having improved workability and assemblability.

Couplings used to connect various pipes should have a watertight structure to prevent leakage of fluids flowing through the pipes.

Conventionally, the piping method shown in FIG. 1, for example, inserts the inner circumferential surface of the rubber band 3 at both ends of the connection portion of the pipe 1, 2, and clamps the stainless steel tightening band 4 around the rubber band 3. In addition, by tightening the tightening bolts 5 provided in the tightening band (4) is made by assembling the rubber band (3) to be in close contact with the pipe (1, 2).

Thus, the connection structure of the piping coupling using the rubber band 3 and the tightening band 4 has the following problem.

First, since the rubber band 3 is forcibly inserted into the pipes 1 and 2, when the other side pipe 2 is assembled to the rubber band 3 inserted into the one pipe 1, the rubber band 3 is removed. After the work is forced to open upside down by manual work is added to connect the pipe (2) is that the assembly is inconvenient and wastes a lot of time, the construction is inferior.

Second, the tightening band 4 is reduced to the same diameter to tighten the rubber band 3, for example, when connecting the cast iron pipe, it is difficult to implement a perfect sealing due to the diameter error of several millimeters generated during the production of the cast iron pipe. This is because if one side of the tightening band 4 is properly tightened, the other side of the tightening band is largely likely to cause a poor tightening.

The present invention was devised in view of the above circumstances, and an object of the present invention is to provide a coupling for piping that is easy to assemble and has excellent workability and that there is no fear of watertight defect due to a diameter error.

Specific means of the present invention for achieving the above object,

Couplings used to connect the connections of both side pipes (11, 12),

An inner ring 22 having an annular jaw 22a at the center of the inner circumferential surface and including pipe insertion holes 22b and 22c to be fitted to opposite ends of the connection portions of the pipes 11 and 12 on both sides of the annular jaw 22a. )and;

The connection ring 22 has an insertion hole 24a, 26a penetrated in the center and a sealing member pressing surface 24b, 26b tapered at the insertion hole 24a for insertion into the pipes 11 and 12, respectively. An outer ring 24 and 26 respectively disposed at both sides of the outer ring;

An elastically deformable ring seal inserted into the pipes 11 and 12 and interposed between the inner ring 22 and one outer ring 24 and the inner ring 22 and the other outer ring 26, respectively. Members 28 and 30;

And tightening means for pressing the sealing members 28 and 30 to tighten the outer rings 24 and 26 to be in close contact with the corresponding contact portions of the inner ring 22 and the outer rings 24 and 26. It is characterized by.

1 is an assembly state diagram showing an example of a conventional piping coupling.

Figure 2 is an exploded perspective view of the coupling for the pipe according to the embodiment of the present invention.

3 is an assembled cross-sectional view of FIG.

Figure 4 is a half sectional view of the sealing member applied to the present invention.

<Explanation of symbols for the main parts of the drawings>

22: inner ring 22a: annular jaw

24, 26: outer ring 25: flange

25a: Bolted hole 28,30: Sealing member

28a, 30a: Tongue 32: Tightening bolt

34: Nut

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view of the coupling for the pipe according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the pipe as an assembled cross-sectional view of Figure 2, Figure 4 is a half sectional view of a sealing member applied to the present invention.

2 to 4, the coupling 20 of the present invention includes an inner ring 22, an outer ring 24 and 26, a sealing member 28 and 30, and fastening means for fastening and fastening them.

The inner ring 22 is freely fitted to the connection site side end portions of both side pipes 11 and 12 as shown in FIGS. 2 and 3, and has an annular jaw limiting a certain amount of entry of the pipes 11 and 12 to the center of the inner circumferential surface thereof. 22a), pipe insertion holes 22b and 22c are formed on both sides of the annular jaw 22a so that end portions of the pipes 11 and 12 are inserted to a predetermined depth.

In this case, each diameter of the pipe insertion holes 22b and 22c may be manufactured to have the same or different diameters corresponding to the diameter change of the corresponding pipes 11 and 12. The outer diameters of the pipes 11 and 12 and the inner diameters of the pipe insertion holes 22b and 22c may be the same, or the inner diameters of the pipe insertion holes 22b and 22c may be at least larger than those of the pipes 11 and 12.

The outer rings 24 and 26 are inserted into the pipes 11 and 12, respectively, and disposed on both sides of the connection ring 22 to force the sealing members 28 and 30 by tightening means. Do this.

The outer rings 24 and 26 are each formed with a plurality of flanges 25 on the outer circumferential surface at predetermined intervals, and each of the flanges 25 is formed with a through bolt fastening hole 25a.

In addition, the outer ring 24 and 26 have insertion holes 24a and 26a penetrated thereinto to be freely inserted into the pipes 11 and 12, and a sealing member pressing surface extending conically in the insertion holes 24a and 26a. 24b, 26b).

Fastening means for fastening the sealing members 28 and 30 by fastening the outer rings 24 and 26 is inserted into one bolt fastening hole 25a of the outer rings 24 and 26 to fasten opposite bolts. A plurality of tightening bolts 32 inserted into the holes 25a and nuts 34 fastened to the threaded portions of the respective tightening bolts 32 are formed.

The sealing members 28 and 30 are inserted into the pipes 11 and 12 so that the inner ring 22 and one outer ring 24 and the inner ring 22 and the other outer ring 26 are interposed therebetween. Each ring is composed of an elastically deformable ring shape. The sealing members 28 and 30 may be made of one of rubber, silicone, and polyurethane so that the sealing and elastic deformation are made, and the sealing members 28 and 30 are not necessarily limited thereto. Of course, special materials may be used.

The inner diameter of the sealing members 28 and 30 is preferably configured to be equal to or slightly smaller than the size of the outer diameter of the pipes 11 and 12 to be inserted. This is to ensure that the inner circumference of the sealing members 28 and 30 is in close contact with the pipes 11 and 12 when the sealing members 28 and 30 are compressed by the tightening force of the tightening bolts 32.

The sealing members 28 and 30 may be further provided with circular tongues 28a and 30a tapered inward to the inner periphery to closely contact the pipes 11 and 12 in order to further increase the waterproof effect. (See Figure 4)

At this time, the tongues 28a and 30a are sandwiched between the inner surfaces of the pipe insertion holes 22b and 22c of the inner ring 22 and the outer peripheral surfaces of the pipes 11 and 12.

In this embodiment, the cross-sections of the sealing members 28 and 30 are circular but are not limited thereto.

The inner ring 22 and the outer ring 24 and 26 are made of metal in the above embodiment, but the present invention is not limited thereto. In addition, special materials or plastics may be applied.

The assembly and operation of this embodiment configured as described above will be described.

First, the outer ring 24 and 26 and the sealing members 28 and 30 are inserted into both pipes 11 and 12, respectively. At this time, the sealing members 28 and 30 side tongues 28a and 30a are assembled to face the connection site side ends of the pipes 11 and 12 as shown in FIG.

At this time, the tongues 28a and 30a of the sealing members 28 and 30 are inserted in close contact with the inner circumferential surfaces of the pipe insertion holes 22b and 22c of the inner ring 22.

In this state, the tightening bolt 32 is inserted into the bolt fastening hole 25a of the flange 25 side of any of the outer rings 24 and 26, and then the nut 34 is coupled to the threaded portion of the tightening bolt 32. Tighten (32).

When the tightening bolt 32 is tightened, the sealing members 28 and 30 interposed between the inner ring 22 and the outer ring 24 and 26 are compressed. The compressed sealing members 28 and 30 are in close contact with the contact portion between the inner ring 22 and the outer ring 24 and 26, and at the same time, the deformation force is generated in the radial direction so that the surface contact with the outer peripheral surfaces of the pipes 11 and 12 is performed. It is firmly adhered to.

Therefore, the two pipes 11 and 12 may be connected by the coupling 20 of the present invention and at the same time, leakage of fluid flowing through the pipes 11 and 12 may be prevented by the adhesion of the sealing members 28 and 30. .

As such, the present invention inserts the parts to be connected to the pipes 11 and 12 into the inner ring 22 side of the center, and then tightens both outer rings 24 and 26 with the tightening bolts 32 to seal the sealing member 28. Since 30 is in close contact with the surrounding structure to perform sealing, the assembly is easy and the workability of the overall pipe is improved.

In addition, the present invention, when the pipe (11, 12) is made of cast iron, even if the manufacturing allowance error is large under the same diameter between each other, the sealing member (28,30) is installed separately from each other to perform an independent function, waterproof effect Appears the same.

In addition, the present invention, if the diameter of the pipe (11, 12) is different, if the inner ring 22 and the sealing member (28, 30) and the outer ring (24, 26) manufactured by changing the dimensions to achieve the function of the coupling Can be.

The tightening means of the above embodiment has been described as an example, the present invention can be directly coupled to the tightening bolt 32 by forming a female screw in the bolt fastening hole (25a) without using a nut (34).

As described above, according to the piping coupling of the present invention, the assembly and construction properties are superior to the number of fastening parts, the waterproofing force is high due to the structural adhesion of the sealing member, and the construction cost can be reduced.

Claims (4)

Couplings used to connect the connections of both side pipes (11, 12), An inner ring 22 having an annular jaw 22a at the center of the inner circumferential surface and including pipe insertion holes 22b and 22c to be fitted to opposite ends of the connection portions of the pipes 11 and 12 on both sides of the annular jaw 22a. )and; The connection ring 22 has an insertion hole 24a, 26a penetrated in the center and a sealing member pressing surface 24b, 26b tapered at the insertion hole 24a for insertion into the pipes 11 and 12, respectively. An outer ring 24 and 26 respectively disposed at both sides of the outer ring; An elastically deformable ring seal inserted into the pipes 11 and 12 and interposed between the inner ring 22 and one outer ring 24 and the inner ring 22 and the other outer ring 26, respectively. Members 28 and 30; And tightening means for pressing the sealing members 28 and 30 to tighten the outer rings 24 and 26 to be in close contact with the corresponding contact portions of the inner ring 22 and the outer rings 24 and 26. A pipe coupling, characterized in that. The method of claim 1, The sealing members 28 and 30 are each provided with a circular tongue 28a and 30a which are further tapered inwardly on the inner circumference thereof and in close contact with the pipes 11 and 12. . The method of claim 1, A plurality of flanges 25 are formed on the outer circumferential surfaces of the outer ring 24 and 26 at predetermined intervals, and each of the flanges 25 has a through bolt fastening hole 25a formed therein. . The method of claim 1, The fastening means includes a fastening bolt 32 inserted into one bolt fastening hole 25a of the outer ring 24 and 26 and inserted into an opposite bolt fastening hole 25a, and a screw portion of the fastening bolt 32. Coupling for piping, characterized in that consisting of a nut (34) fastened to.