KR102347746B1 - Expansion joint - Google Patents

Abstract

The present invention relates to an expansion joint. The purpose of the present invention is to enable bellows to be combined easily and stably between two dual pipes while reducing costs by greatly reducing the configuration of a corrugated pipe joint. The expansion joint according to the present invention comprises: a first dual pipe including a first outer pipe formed in a hollow shape and having a first flange formed at one end and a first inner pipe accommodated in the first outer pipe and having a diameter smaller than that of the first outer pipe; a second dual pipe arranged with a predetermined gap from the dual pipe and including a second outer pipe formed in a hollow shape and having a second flange formed at one end and a second inner pipe accommodated in the second outer pipe and having a diameter smaller than that of the second outer pipe; inner bellows having one side combined with the inner surface of the first inner pipe, having the other side combined with the inner surface of the second inner pipe, and having first corrugated protrusions formed thereon; and outer bellows having one side combined with the outer surface of the first outer pipe, having the other side combined with the outer surface of the second outer pipe and having second corrugated protrusions formed thereon.

Description

Expansion joint{EXPANSION JOINT}

The present invention relates to an expansion joint, and more particularly, to an expansion joint that can significantly reduce the configuration of the corrugated pipe joint and reduce the cost, and can easily and stably combine a bellows between two double pipes. it's about

In general, a pipe is mainly used as a means for transporting gases and fluids such as gas from a lathe.

Such a pipe is made in a form in which several pipes are connected due to a significant relationship in length. The pipe is mainly made of a metal material, and these materials have a large deformation, such as stretching or shrinking depending on the temperature.

In addition, when the pipe is installed in a moving means such as a ship or a vehicle, significant vibration and heat are generated during the operation of the moving means, and these vibrations and heat are transmitted to the pipe and may cause damage to the pipe.

In the case of a long pipe to absorb this deformation, a flexible pipe joint is installed at an appropriate interval between the pipe and the pipe.

However, the conventional expansion line piping joint consists of a connection part formed at both ends of a corrugated pipe and a corrugated pipe, and a flange part formed in the connection part. After fixing the connection part by welding to the corrugated pipe, the flange is welded to the connection part connected to the corrugated pipe.

However, there are many welding parts and components connecting the components, so manufacturing cost is improved, productivity is lowered, and the problem that manufacturing time is excessively required still exists.

Unexamined Patent Publication No. 2012-0133850 (published on December 11, 2012)

The present invention has been devised to solve the problems of the prior art, and it is possible to significantly reduce the configuration of the corrugated pipe joint to reduce the cost, and also to combine the bellows between the two double pipes easily and stably. It aims to provide a pension joint.

The expansion joint according to the present invention includes a first outer tube having a hollow shape and having a first flange formed at one end, and a first inner tube accommodated in the first outer tube and having a smaller diameter than the first outer tube. A first double tube comprising a; A second outer tube disposed so as to be spaced apart from the double tube by a predetermined distance and having a hollow shape and having a second flange formed at one end, and a second second outer tube accommodated in the second outer tube and having a smaller diameter than the second outer tube. a second double tube including an inner tube; an inner bellows having one side coupled to the inner surface of the first inner tube, the other end coupled to the inner surface of the second inner tube, and having first corrugations formed thereon; and an outer bellows having one side coupled to the outer surface of the first outer tube, the other end being coupled to the outer surface of the second outer tube, and having second corrugations formed thereon, including, on one side and the other side of the inner bellows The inner surface of the first inner tube and the inner surface of the second inner tube are respectively contacted with the first coupling portion having a hollow shape is formed, respectively, and the outer surface and the second outer surface of the first outer tube are formed on one side and the other side of the outer bellows. A hollow second coupling portion is respectively formed in contact with the outer surface of the tube, and the first coupling portion and the second coupling portion are the first inner tube and the first outer tube and the second inner tube and the second outer It further includes a coupling band for jointly bending and coupling to the tube, wherein the second corrugation is provided with a restoration unit so as to be restored by elasticity when deformed by heat according to the movement of the object, the restoration unit, the second corrugation a ball part accommodated in a reinforcing groove formed in the inside, and formed of an elastic material; a pair of support walls arranged to be spaced apart from each other in the central portion of the inner space of the ball part; an inclined slit part disposed to be spaced apart from each other in a vertical direction on one side of the support wall and elastically supporting the inner wall surface of the ball part; a support part having a wavy shape elastically supporting both the support walls; a housing disposed between the inclined slit part, one side and the other side fixed to the inner wall surface and the support part of the ball part, respectively, formed in an oval shape with an empty space therein, and made of metal or synthetic resin material to have elasticity; And it is composed of two pairs and accommodated in contact with each other in the inner space of the housing, is formed in an oval shape with an empty space therein, and is formed of a metal or synthetic resin material and has elasticity; , The housing and the deformation suppression portion are formed of an elastic material, so that when the second pleats are deformed by the heat generated during the movement of the object, the second pleats deformed by the elasticity of the housing and the deformation suppressor are restored. and the ball part includes a first body and a second body, wherein the first body and the second body are formed in a hemispherical shape, opposite surfaces are open, an empty space is formed therein, and surfaces in contact with each other are coupled and a first body and a second body formed of a metal or synthetic resin material and having elasticity.

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The expansion joint according to the present invention has the effect of significantly reducing the configuration constituting the corrugated pipe joint, thereby reducing the cost, and easily and stably coupling the bellows between the two double pipes.

1 is a perspective view showing an expansion joint according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing an expansion joint according to an embodiment of the present invention.
3 is a view showing a state in which the inner bellows and the outer bellows applied to the expansion joint according to an embodiment of the present invention are coupled to the first double pipe and the second double pipe through the coupling part.
Figure 4 is a view showing a restoration applied to the expansion joint according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. Throughout the specification, like reference numerals are assigned to similar parts.

1 is a perspective view showing an expansion joint according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an expansion joint according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention It is a view showing a state in which the inner bellows and the outer bellows applied to the expansion joint according to the present invention are coupled to the first double pipe and the second double pipe through the coupling part, and FIG. 4 is applied to the expansion joint according to an embodiment of the present invention. It is a diagram showing the restoration part.

The expansion joint 1 according to an embodiment of the present invention is a product coupled to a pipe to move an object such as gas, steam and fluid.

The expansion joint according to an embodiment of the present invention is made of a hollow type and accommodated in the first outer tube 11 and the first outer tube 11 having a first flange 111 formed at one end, and is accommodated in the first outer tube. The first double pipe 10 and the double pipe including the first inner pipe 12 having a smaller diameter than the pipe 11 are arranged to be spaced apart from each other by a predetermined distance, and are made of a hollow type and have a second flange 211 at one end. A second double tube 20 including the formed second outer tube 21 and a second inner tube 22 accommodated inside the second outer tube 21 and having a smaller diameter than the second outer tube 21 . ) may include at least any one or more of.

The first outer tube 11 and the first inner tube 12 are formed in a hollow shape so that the object is moved.

The first flange 111 and the second flange 211 are respectively connected to the pipe.

The first flange 111 and the second flange 211 may be welded and fixed to the first outer tube 11 and the second outer tube 21, respectively, and the first outer tube 11 and the second outer tube ( It is also possible to form integrally with 21).

The first flange 111 and the second flange 211 are formed in an annular shape, and the bolt holes are formed while maintaining a predetermined interval, and are connected by bolts to the flange of the pipe.

Furthermore, the expansion joint according to an embodiment of the present invention may further include at least one of the inner bellows 30 and the outer bellows 40 .

The inner bellows 30 has first corrugations 31 are formed along the longitudinal direction.

The first wrinkle protrusions 31 are formed in an annular shape to be curved while maintaining a predetermined distance from each other.

The first corrugations 31 may be formed in a wavy shape on the inner bellows 30 .

The first corrugated protrusions 31 allow the first inner tube 12 and the second inner tube 22 to expand and contract by the heat according to the movement of the object, thereby preventing the aforementioned piping from being deformed or damaged. and the first inner tube 12 and the second inner tube 22 are prevented from being damaged.

The inner bellows 30 may be formed in a hollow shape.

One side of the inner bellows 30 is coupled to the inner surface of the first inner tube 12 , and the other end is coupled to the inner surface of the second inner tube 22 .

To this end, one side and the other side of the inner bellows 30 are in contact with the inner surface of the first inner tube 12 and the inner surface of the second inner tube 22, respectively, and a first coupling part 311 made of a hollow type is provided, respectively. is formed

The outer bellows 40 has second corrugations 41 are formed along the longitudinal direction.

The second wrinkle projections 41 are formed in an annular shape to be curved while maintaining a predetermined distance from each other.

The second pleats 41 may be formed in a wavy shape on the outer bellows 40 .

The second corrugation 41 prevents the above-described pipe from being deformed or damaged by allowing the first external pipe 11 and the second external pipe 21 to expand and contract by the heat according to the movement of the object. and the first outer tube 11 and the second outer tube 21 are prevented from being damaged.

The outer bellows 40 may be formed in a hollow shape.

One side of the outer bellows 40 is coupled to the outer surface of the first outer tube 11 , and the other end is coupled to the outer surface of the second outer tube 21 .

For this, one side and the other side of the outer bellows 40 are in contact with the outer surface of the first outer tube 11 and the outer surface of the second outer tube 21, respectively, and a second coupling part 411 made of a hollow type is respectively is formed

3, the first coupling part 311 located on the upper side of the inner bellows 30 and the second coupling part 411 located on the upper side of the outer bellows 40 are the first coupling bands 50a ) is fixed to the inner surface of the first inner tube 12 and the outer surface of the first outer tube 11, respectively.

And, the first coupling part 311 located on the lower side of the inner bellows 30 and the second coupling part 411 located on the lower side of the outer bellows 40 are first coupled by the second coupling band 50b. 2 It is fixed to the inner surface of the inner tube 22 and the outer surface of the 2nd outer tube 21, respectively.

The first coupling band 50a is formed in a ring shape and is formed in a ring shape and a first exterior 501a coupled while surrounding the outer periphery of the second coupling part 411 from the outside of the first outer tube 11, It may have a double structure including a first inner tube (502a) coupled while surrounding the inner periphery of the first coupling portion (311) in the interior of the first inner tube (12).

The second coupling band 50b is formed in a ring shape and has a second exterior 501b and a ring shape that are coupled while surrounding the outer periphery of the second coupling part 411 from the outside of the second outer tube 21, It may have a double structure including a second inner tube (502b) coupled while surrounding the inner periphery of the first coupling portion (311) in the interior of the second inner tube (22).

At this time, the first outer tube 11 is connected to the first flange 111 after being manufactured by the mold, and the first inner tube 12 is also connected to the first flange 111 after being manufactured by the mold. In addition, the upper ends of the first outer tube 501a and the first inner tube 502a may be coupled to the first outer tube 11 and the first inner tube 12 in a bending manner, respectively, and the second outer tube 501b) And the second outer tube 501b may be coupled to the lower end of the second outer tube 21 and the second inner tube 22 in a bending manner, respectively.

In this way, the first coupling part 311 located on the upper side of the inner bellows and the second coupling part 411 located on the upper side of the outer bellows are jointly fixed through the first coupling band 50a, The first coupling part 311 located on the lower side of the inner bellows 30 and the second coupling part 411 located on the lower side of the outer bellows 40 are jointly fixed through the second coupling band 50b. Accordingly, it is possible to significantly shorten the time for coupling the inner bellows 30 and the outer bellows 40 to the first double pipe 10 and the second double pipe 20, and to facilitate this coupling operation. can, and the first coupling band (50a) and the second coupling band (50b) other than the connecting member is not used, the component components are simplified and the welding area for fixing the component components to each other is reduced, thereby improving productivity and production efficiency, and It is possible to shorten the manufacturing time.

Furthermore, unlike the conventional welding method, the first outer tube 11 and the first inner tube 12 , the second outer tube 21 and the second outer tube 22 are connected to the inner bellows 30 and the outer bellows. Instead of being coupled to each of 40 by welding, the first coupling band 50a and the second coupling band 50b are banded together to further improve productivity and production efficiency and further shorten the manufacturing time.

On the other hand, a reinforcing groove (41a) is formed in the inside of the second wrinkle protrusion (41), and the restoration part (60) is further provided in the reinforcing groove (41a) so as to be restored by elasticity when deformed by heat according to the movement of the object. do.

The restoration unit 60 may include at least one of a ball unit 61 , a support wall 62 , an inclined slip unit, a support unit 64 , a housing 65 , and a deformation suppression unit 66 .

The ball part 61 may be accommodated in any one or more selected from the reinforcing grooves 41a of all the second corrugation projections 41 or each of the reinforcing grooves 41a.

The ball part 61 may be fixed to the inner surface of the second corrugation 41 by welding or an adhesive while being accommodated in the reinforcing groove 41a.

The ball part 61 is formed in a hemispherical shape and may include a first body 611 and a second body 612 .

The first body 611 and the second body 612 have a structure in which faces facing each other are open and an empty space is formed therein.

A protrusion and a fixing groove into which the protrusion is inserted may be formed on surfaces of the first body 611 and the second body 612 in contact with each other.

The protrusion may be formed on the first body 611 , and the fixing groove may be formed on the second body 612 , but may be formed in the opposite structure.

Each of the empty spaces of the first body 611 and the second body 612 may be formed in a 'C'-shaped cross-sectional shape.

The first body 611 and the second body 612 are formed of a material having elasticity, such as metal, synthetic resin, or rubber.

Accordingly, the first body 611 and the second body 612 are formed on the inner wall surface of the second pleats 41 when the second pleats 41 are deformed by the heat generated in the process of moving the object. Although pressed and compressed by the elastic action, the deformed second corrugation 41 is restored to its original state while being restored to its original state.

Furthermore, as the first body 611 and the second body 612 are fixed to the reinforcing groove 41a by adhesive or welding, the gap between the inner surfaces of the second corrugation 41 by heat is suppressed. do.

The support wall 62 is fixed to the empty space of the first body 611 and the empty space of the second body 612, respectively, and is spaced apart from each other by a predetermined distance.

The first body 611 and the second body 612 may be formed in a substantially rectangular plate shape.

A plurality of inclined slit portions 63 are applied and are disposed to be spaced apart from each other in a vertical direction on one side of the support wall 62 .

The inclined slit portion 63 is formed to have an inclination angle that gradually moves away from the support wall 62 from the lower end coupled to the support wall 62 toward the upper end.

The upper end of the inclined slit part 63 may be fixed to the inner wall surface of the first body 611 or the inner wall surface of the second body 612, or may be spaced apart from each other by a predetermined interval.

The inclined slit part 63 is formed of a material having elasticity, such as metal or synthetic resin, and elastically supports the first body 611 and the second body 612 .

Accordingly, the inclined slit portion 63 is formed when the first body 611 and the second body 612 are compressed by the second corrugation 41, the first body 611 and the second body 612. By elastically supporting the inner wall surface of the first body 611 and the second body 612 to minimize the compression range.

For this reason, the inclined slit portion 63 increases the restoration speed of the second corrugation 41 while allowing the compression of the first body 611 and the second body 612 to a certain level.

The support part 64 is formed in a wavy shape to elastically support both support walls 62 . The support part 64 is compressed to a certain level when an external force is applied, and is made of a metal material and has a wavy shape so that it is restored to its original state when the external force is dissipated.

The support part 64 cushions the external force transmitted to the support wall 62 as the second corrugation 41 is compressed, thereby reducing the burden of the external force applied to the support wall 62 .

At this time, the support part 64 may be formed in a simple rectangular bar shape only to function to maintain the distance between the support walls 62, and it is revealed that it may be omitted if necessary.

The housing 65 is disposed between the inclined slit portions 63 .

The housing 65 may be formed in an oval shape with an empty space therein so that it can be compressed to a certain level when an external force is applied, and may be made of a material having elasticity, such as metal, synthetic resin, or rubber.

The housing 65 may be coupled or separated through a protrusion and a fixing groove while having a bisected structure like the above-described ball part 61 to accommodate the deformation suppression part 66 to be described later.

The housing 65 located on the first body 611 has one side and the other side fixed to the support wall 62 and the first body 611 with adhesive, respectively, and the housing 65 located on the second body 612 has one side. and the other side may be respectively fixed to the support wall 62 and the second body 612 with an adhesive.

The deformation restraint portion 66 is configured as a pair and is accommodated in an empty space of the housing 65 so as to be in contact with each other.

The deformation suppressor 66 may be formed in an oval shape with an empty space therein so that it can be compressed to a certain level when an external force is applied, and may be made of a material having elasticity, such as metal, synthetic resin, or rubber.

The housing 65 supports the inner wall surfaces of the first body 611 and the second body 612, so that the gap between the inner surfaces of the second corrugations 41 is narrowed by the object, and thereby the first body When the (611) and the second body (612) are pressed against the inner wall surface of the second corrugation (41), the compression level is minimized by supporting the first body (611) and the second body (612) while being compressed to a certain level. make it

Moreover, the deformation suppression parts 66 support the housing 65 while being compressed to a certain level when pressed to the compressed housing 65 to minimize the degree of compression.

That is, when the second corrugation 41 is deformed by the heat generated in the process of moving the object, the ball part 61, the inclined slit part 63, the support part 64, the housing 65 and By allowing the second corrugation 41 deformed by the elasticity of the deformation suppression part 66 to be restored quickly, compared to that the external bellows 40 and the second corrugation 41 are restored after thermal deformation, rapid restoration is possible. that can make it possible

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims described below rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted

1: expansion joint 10: first double pipe
11: first outer tube 111: first flange
12: first inner tube 20: second double tube
21: second outer tube 211: second flange
22: second inner tube 30: inner bellows
31: first wrinkle 311: first coupling part
40: external bellows 41: second pleats
41a: reinforcing groove 411: second coupling part
50a: first coupling band 501a: first appearance
502a: first inner tube 50b: second coupling band
501b: second exterior 502b: second interior
60: restoration unit 61: ball unit
611: first body 612: second body
62: support wall 63: inclined slit portion
64: support 65: housing
66: deformation suppression unit

Claims (4)

a first double pipe having a hollow shape and having a first flange formed at one end and a first inner pipe accommodated in the first external pipe and having a smaller diameter than the first external pipe;
A second outer tube disposed so as to be spaced apart from the double tube by a predetermined distance and having a hollow shape and having a second flange formed at one end, and a second second outer tube accommodated in the second outer tube and having a smaller diameter than the second outer tube. a second double tube including an inner tube;
an inner bellows having one side coupled to the inner surface of the first inner tube, the other end coupled to the inner surface of the second inner tube, and having first corrugations formed thereon; and
One side is coupled to the outer surface of the first outer tube, the other end is coupled to the outer surface of the second outer tube, the second outer bellows with corrugations formed; includes;
On one side and the other side of the inner bellows, a first coupling portion made of a hollow shape is respectively formed in contact with the inner surface of the first inner tube and the inner surface of the second inner tube,
At one side and the other side of the outer bellows, a second coupling portion made of a hollow shape is respectively formed in contact with the outer surface of the first outer tube and the outer surface of the second outer tube,
The first coupling part and the second coupling part further include a coupling band for jointly bending the coupling to the first inner tube, the first outer tube, and the second inner tube and the second outer tube, respectively,
A restoration part is installed in the second corrugation so as to be restored by elasticity when deformed by heat according to the movement of the object,
The restoration unit,
a ball part accommodated in a reinforcing groove formed inside the second corrugation and formed of an elastic material;
a pair of support walls arranged to be spaced apart from each other in the central portion of the inner space of the ball part;
an inclined slit part disposed to be spaced apart from each other in a vertical direction on one side of the support wall and elastically supporting the inner wall surface of the ball part;
a support part having a wavy shape elastically supporting both the support walls;
a housing disposed between the inclined slit part, one side and the other side fixed to the inner wall surface and the support part of the ball part, respectively, formed in an oval shape with an empty space therein, and made of metal or synthetic resin material to have elasticity; and
It consists of two pairs and is accommodated in contact with each other in the inner space of the housing, is formed in an oval shape with an empty space therein, and is formed of a metal or synthetic resin material and has elasticity;
The housing and the deformation suppression portion are formed of an elastic material, so that when the second pleats are deformed by the heat generated while the object is moved, the second pleats deformed by the elasticity of the housing and the deformation suppressor are restored. ,
The ball part includes a first body and a second body, wherein the first body and the second body are formed in a hemispherical shape, opposite surfaces are open, an empty space is formed therein, and surfaces in contact with each other are combined, An expansion joint comprising a first body and a second body formed of a metal or synthetic resin material and having elasticity.
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