KR20140065794A

KR20140065794A - Coupling for piping

Info

Publication number: KR20140065794A
Application number: KR1020120132697A
Authority: KR
Inventors: 이길호
Original assignee: 에스엘티 주식회사
Priority date: 2012-11-22
Filing date: 2012-11-22
Publication date: 2014-05-30

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling for piping, and more particularly, to a coupling for piping that can secure a more stable airtightness by preventing occurrence of scratches in a closed portion in a coupling used in a vacuum piping.
The configuration is for interconnecting the first and second pipes facing each other,
A first flange coupled to a rear end of the first pipe on an inner circumferential surface thereof; A second flange coupled to a front end portion of the second pipe on an inner circumferential surface thereof and disposed to face the first flange; Sealing means interposed between the first and second flanges; And a fastening means for pressingly fixing the first and second flanges to the sealing means side,
The sealing means
An annular first recessed portion formed on the rear surface of the first flange and an annular second recessed portion formed on the front surface of the second flange to correspond to the first recessed portion, A housing space provided in the housing; An outering which is inserted into the accommodating space and is brought into contact with an outer peripheral surface of the first and second recessed portions; An inner ring inserted into the accommodation space and being in contact with an inner circumferential surface of the first and second recessed portions; And a sealing ring interposed between the outer ring and the inner ring and contacting the side surfaces of the first and second recessed portions.
According to such a constitution, since the portion to be brought into contact with the sealing ring is recessed from the surfaces of the first and second flanges, scratches in the sealing portion can be prevented.
In addition, since the outering and the inner ring are inserted into the accommodation space portion provided between the first and second flanges, the first and second pipes can be easily positioned, and the first and second pipes have a more rigid coupling structure .

Description

{COUPLING FOR PIPING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling for piping, and more particularly, to a coupling for piping that can secure a more stable airtightness by preventing occurrence of scratches in a closed portion in a coupling used in a vacuum piping.

As a technology relating to piping coupling, Korean Patent Registration No. 10-1127396 (published on March 22, 2012, hereinafter referred to as "prior art") "a flange structure for vacuum piping" is presented.

The prior art

Two pipes with a pipe expanding member joined at one end thereof;

A gasket which is fitted over at least one of the respective pipe expanding members and is formed along the inner circumferential surface of the expanding member insertion portion into which the pipe expanding member is inserted;

A center hole is formed in the center of the pipe to allow the pipe to pass therethrough, and the pipe is inserted from the other end of the pipe to each of the pipe expanding members, and a depression is formed on the upper surface at three or more positions symmetrical with respect to the central axis A flange;

A double claw clamp inserted into the depression and pulling and fixing the flanges to each other; Quot; is characterized in that it comprises:

It is possible to block the occurrence of leakage due to scratches that may occur in the flange, and to connect the pipe and the flange to each other by a non-welding method, thereby obtaining a uniform coating film when the fluororesin coating is performed.

Although the prior art is capable of sealing leakage by scratching by covering a gasket with a pipe expanding member,

There arises a problem that the airtightness is lowered when scratches occur on the pipe expanding member on the side not covered with the gasket.

In addition, since it is difficult to manufacture the pipe by forming an expanding member in the pipe, and there is no means for fixing the position of the two pipes before the clamp is fastened, there is a problem that it is difficult to stably set or maintain the positions of the two pipes.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a coupling for piping that can prevent the occurrence of scratches in a sealed portion, facilitate positioning of two pipes, and have a more stable coupling structure between the two pipes.

According to an aspect of the present invention, there is provided a coupling for piping,

A method for interconnecting mutually facing first and second pipes,

A first flange coupled to a rear end of the first pipe on an inner circumferential surface thereof;

A second flange coupled to a front end portion of the second pipe on an inner circumferential surface thereof and disposed to face the first flange;

Sealing means interposed between the first and second flanges; And

Fastening means for pressingly fixing the first and second flanges to the sealing means side;

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The sealing means

An annular first recessed portion formed on the rear surface of the first flange and an annular second recessed portion formed on the front surface of the second flange to correspond to the first recessed portion, A housing space provided in the housing;

An outering which is inserted into the accommodating space and is brought into contact with an outer peripheral surface of the first and second recessed portions;

An inner ring inserted into the accommodation space and being in contact with an inner circumferential surface of the first and second recessed portions; And

A sealing ring interposed between the outer ring and the inner ring, the sealing ring being in contact with a side surface of the first and second recessed portions;

And a control unit.

In the piping coupling according to the present invention,

A portion to be brought into contact with the sealing ring is recessed from the surfaces of the first and second flanges, thereby preventing the occurrence of scratches in the sealing portion.

In addition, since the outering and the inner ring are inserted into the accommodation space portion provided between the first and second flanges, the first and second pipes can be easily positioned, and the first and second pipes have a more rigid coupling structure .

1 is a perspective view showing a use state of a pipe coupling according to an embodiment of the present invention.
2 is an exploded perspective view of a pipe coupling according to an embodiment of the present invention;
Fig. 3 is an exploded perspective view showing the pipe coupling shown in Fig. 2 in another direction. Fig.
Fig. 4 is a sectional view of Fig. 1; Fig.
FIG. 5 is an enlarged cross-sectional view showing a main portion of FIG. 4; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the left side is designated as the front side or the front side, and the right side is defined as the rear side or the rear side. .

1 to 5, a coupling for piping according to an embodiment of the present invention is for interconnecting first and second pipes 10 and 20 facing each other, and includes a first flange 100, a second flange 200, a sealing means 300, and a fastening means 400.

Here, the first and second pipes 10 and 20 may be vacuum piping as well as various piping pipes used for supplying and discharging gas or liquid.

That is, the coupling of the present invention can be applied not only to vacuum piping but also to various piping requiring airtightness and watertightness.

Hereinafter, with respect to each configuration of the coupling,

The first flange 100

And the rear end of the first pipe 10 is joined to the inner circumferential surface thereof.

The first flange 100 and the first pipe 10 are welded to each other and a first pipe 10 is formed on the inner circumferential surface of the first flange 100 so that the first pipe 10 can be stably engaged. And an annular first support portion 110 to be seated is protruded.

The second flange (200)

Like the first flange 100, and the front end of the second pipe 20 is coupled to the inner circumferential surface of the flange 100 and is disposed to face the first flange 100. [

The second flange 200 and the second pipe 20 are welded to each other and the second pipe 20 is coupled to the inner circumferential surface of the second flange 200 so that the second pipe 20 can be stably engaged. And an annular second support portion 210 to be seated is protruded.

The sealing means (300)

And is interposed between the first and second flanges 100 and 200,

An annular first recessed portion 311 formed on the rear surface of the first flange 100 and an annular second recessed portion formed on the front surface of the second flanged portion 200 so as to correspond to the first recessed portion 311, 312), and includes a receiving space part (310) provided between the first and second flanges (100, 200);

An outer ring 320 inserted into the accommodation space 310 and in contact with the outer peripheral surface of the first and second recessed parts 311 and 312;

An inner ring 330 inserted into the accommodation space 310 and brought into contact with an inner circumferential surface of the first and second recessed portions 311 and 312; And

A sealing ring 340 interposed between the outer ring 320 and the inner ring 330 and contacting the side surfaces of the first and second recessed portions 311 and 312;

.

In the first and second flanges 100 and 200, the portions to be brought into contact with the sealing ring 340 are formed in the surface by the first and second recessed portions 311 and 312, It is possible to prevent the occurrence of scratches on the sealed portion.

In other words, it is possible to prevent the airtightness and the watertightness from being deteriorated due to the scratch by blocking the occurrence of scratches in the sealed portion.

The outer ring 320, the inner ring 330, and the sealing ring 340 are inserted into the accommodation space 310 provided between the first and second flanges 100 and 200, The positioning of the first and second pipes 10 and 20 is easy and the first and second pipes 10 and 20 have a more rigid coupling structure.

In other words, the radial movement of the first and second flanges 100 and 200 is restricted by the outer ring 320 and the inner ring 330 so that the first and second pipes 10 and 20 Can be disposed more easily on the same center line and the first and second pipes 10 and 20 can be prevented from being shifted from each other due to a load in the radial direction.

The outer ring 320 and the inner ring 330 are preferably made of a metal material having excellent strength and corrosion resistance such as stainless steel and the sealing ring 340 is preferably made of a rubber material such as elastic and airtight.

The inner circumferential surface of the outer ring 320 and the outer circumferential surface of the inner ring 330 have a sectional shape of the sealing ring 340 so that the outer ring 320, the inner ring 330 and the sealing ring 340 can be fixed to each other. It is preferable to form the seating grooves 321 and 331 having a shape corresponding to that of the first embodiment.

The fastening means (400)

The first and second flanges 100 and 200 are for pressing and fixing the first and second flanges 100 and 200 toward the sealing means 300,

Three or more clamps 410 having first and second claws 411a and 412a in the form of hooks at the front end and the rear end, respectively;

Three or more first engaging grooves 420 which are recessed and radially arranged on the front surface of the first flange 100 and are engaged with the first claws 411a of the clamps 410; And

An annular second locking groove 430 formed on the rear surface of the second flange 200 and engaged with the second claw 412a of each clamp 410;

.

With such a configuration, the first claws 411a of the clamps 410 are engaged with the respective first engagement grooves 420, so that the clamps 410 are radially arranged to form the first and second flanges 100 ) 200 can be stably pressed and fixed.

The second claws 412a of the respective clamps 410 are connected to the second claws 430a of the second claws 430a, As shown in FIG.

In other words, when three or more first engaging grooves 420 are arranged radially and the second engaging grooves 430 are formed into one annular shape, when the first and second engaging grooves are all arranged radially in three or more directions, It is possible to solve the problem of disposing the first and second latching grooves at the opposite positions, and when the first and second latching grooves are all formed in one annular shape, the clamps 410 are arranged at a predetermined position It is possible to solve difficult problems.

The clamp 410 may be, as shown in Figure 5,

An insertion hole 411b formed in the front-rear direction, a first block 411 having the first claw 411a;

A screw hole 412b disposed at the rear of the first block 411 and disposed on the same center line as the insertion hole 411b and a second block 412 having the second claw 412a; And

A bolt 413 fastened to the screw hole 412b of the second block 412 through the insertion hole 411b of the first block 411;

.

That is, the clamp 410 presses and fixes the first and second flanges 100 and 200 by making the first and second blocks 411 and 412 close to each other by fastening the bolt 413 do.

The first block 411 is formed with a guide portion 411c protruding toward the second block 412 while the second block 412 is provided with a guide portion 411b of the first block 411, A corresponding guide portion 412c into which the guide portion 411c enters is formed.

According to this, it is possible to prevent the first and second blocks 411 and 412 from being shifted from each other by the torque acting upon tightening of the bolt 413.

The fastening means 400 is not limited to the clamp 410 and the first and second fastening grooves 420 and 430. The fastening means 400 may be formed by directly supporting the first and second flanges 100 and 200 The first and second flanges 100 and 200 can be pressed and fixed to the sealing means 300 side by fastening them with a bolt or by clamping a clamp for enclosing the first and second flanges 100 and 200 Various means may be applied within the scope.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those precise embodiments, and various modifications and changes may be made thereto by those skilled in the art. And should be construed as falling within the scope of protection of the invention.

10; The first pipe
20; The second pipe
100; The first flange
110; The first support portion
200; The second flange
210; The second support
300; Sealing means
310; The accommodation space
311; The first incision part
312; The second incision part
320; Outering
321; Seat groove
330; Inner ring
331; Seat groove
340; Sealing ring
400; Fastening means
410; clamp
411; The first block
411a; The first claw
411b; Insert ball
411c; Guide portion
412; The second block
412a; The second claw
412b; Napong
412c; Corresponding guide section
413; volt
420; The first latching groove
430; The second latching groove

Claims

For mutually connecting the first and second pipes 10 and 20,
A first flange (100) to which a rear end of the first pipe (10) is coupled to an inner circumferential surface;
A second flange (200) coupled to a front end portion of the second pipe (20) on an inner circumferential surface and disposed to face the first flange (100);
Sealing means 300 interposed between the first and second flanges 100 and 200; And
Fastening means (400) for pressing and fixing the first and second flanges (100) and (200) to the sealing means (300) side;
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The sealing means (300)
An annular first recessed portion 311 formed on the rear surface of the first flange 100 and an annular second recessed portion 311 formed on the front surface of the second flanged portion 200 so as to correspond to the first recessed portion 311, (310) formed between the first and second flanges (100) and (200) and including a recessed portion (312);
An outer ring 320 inserted into the accommodation space 310 and in contact with an outer peripheral surface of the first and second recessed parts 311 and 312;
An inner ring 330 inserted into the accommodation space 310 and in contact with an inner circumferential surface of the first and second recessed portions 311 and 312; And
A sealing ring 340 interposed between the outer ring 320 and the inner ring 330 and contacting the side surfaces of the first and second recessed portions 311 and 312;
And a coupling member for coupling the pipe.

The method according to claim 1,
The fastening means (400)
Three or more clamps 410 having first and second claws 411a and 412a in the form of hooks at the front end and the rear end, respectively;
Three or more first latching grooves 420 which are formed on the front surface of the first flange 100 so as to be radially arranged and are engaged with the first claws 411a of the respective clamps 410; And
An annular second latching groove 430 formed on the rear surface of the second flange 200 and engaged with the second claws 412a of the respective clamps 410;
And a coupling member for coupling the pipe.

3. The method of claim 2,
The clamp 410
An insertion hole 411b formed in the front-rear direction, a first block 411 having the first claw 411a;
A screw hole 412b disposed at the rear of the first block 411 and disposed on the same center line as the insertion hole 411b and a second block 412 having the second claw 412a; And
A bolt 413 fastened to the screw hole 412b of the second block 412 through the insertion hole 411b of the first block 411;
, &Lt; / RTI >
The first block 411 is formed with a guide portion 411c protruding toward the second block 412,
Wherein a corresponding guide portion 412c is formed in the second block 412 to guide the guide portion 411c of the first block 411 when the bolt 413 is fastened.

4. The method according to any one of claims 1 to 3,
Annular first and second support portions 110 and 210 for seating the first and second pipes 10 and 20 are formed on the inner circumferential surfaces of the first and second flanges 100 and 200, Wherein the coupling portion is formed in a cylindrical shape.