KR101636267B1 - Connecting pipe with more strength - Google Patents

Connecting pipe with more strength Download PDF

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Publication number
KR101636267B1
KR101636267B1 KR1020150142022A KR20150142022A KR101636267B1 KR 101636267 B1 KR101636267 B1 KR 101636267B1 KR 1020150142022 A KR1020150142022 A KR 1020150142022A KR 20150142022 A KR20150142022 A KR 20150142022A KR 101636267 B1 KR101636267 B1 KR 101636267B1
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KR
South Korea
Prior art keywords
flange
protrusion
rod
setting
bellows
Prior art date
Application number
KR1020150142022A
Other languages
Korean (ko)
Inventor
손종우
Original Assignee
주식회사 세프코
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Publication date
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Priority to KR1020150142022A priority Critical patent/KR101636267B1/en
Application granted granted Critical
Publication of KR101636267B1 publication Critical patent/KR101636267B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/028—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with the expansion or contraction of each corrugation being limited

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)

Abstract

The present invention relates to a rigid reinforced eutectic tube in which a part of a bellows is modified or eliminated to improve rigidity in the longitudinal direction.
The rigid reinforced rigid reinforced ear canal according to the present invention comprises a left flange 100 and a right flange 110 formed to be spaced apart from each other at right and left sides; A bellows 200 disposed between the left flange 100 and the right flange 110 to allow a length between the left flange 100 and the right flange 110 to be variable; A left setting log 120 and a right setting log 130 protruding outward from the left flange 100 and the right flange 110; A setting bolt 300 and a setting nut 400 which are provided between the left setting log 120 and the right setting log 130 to support the left setting log 120 and the right setting log 130 to be spaced apart from each other by a predetermined distance, ); The bellows 200 includes a protrusion 230 protruding outward to form a corrugation and a planar portion 240 having a plane corresponding to the flanges 100 and 110. According to the present invention as described above, there is an advantage that the elasticity and the rigidity are complementary to each other.

Description

{Connecting pipe with more strength}

More particularly, the present invention relates to a stretchable reinforced concrete pipe having a stiffness enhanced in the longitudinal direction by deforming or deleting a part of the bellows.

In general, a joint pipe is used to connect two pipes in a machine tool or the like. It is also called coupling, and bellows are added to improve elasticity.

The bellows are formed with a rimmed steel rim welded to the end of the projection of the pipe. That is, it means that wrinkles are formed. These bellows are commonly used to seal gas or liquid water filled in or flowing into the pipe while allowing movement in the longitudinal direction (axial direction) of the pipe.

Bellows are used for connecting pipes that need to be expanded and shrunk and bellows are used for pipe-work and duct-line of various process engineering. do.

In various engineering pipes, expansion or mechanical vibration occurs due to heat or pressure. Extensible bellows using bellows is widely used for absorbing such thermal expansion and vibration.

However, since such bellows are manufactured using metal or PTFE resin as a raw material, there is no problem that rigidity is strong and stretchability is not exhibited properly. That is, bellows made of a metal material are used to seal the fluid or gas inside and to connect a pipe made of a metal, but it is difficult to properly respond to the contraction of the pipe due to lack of elasticity .

In addition, when the elasticity is strengthened, the length of the joint pipe is excessively changed, which results in a problem that rigidity is weakened.

Patent No. 10-0631141

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a stretchable tube having a bellows- will be.

Another object of the present invention is to provide a stretchable union tube having a stiffness enhanced by cutting a part of the bellows 200 so that the stiffness in the longitudinal direction is strengthened by being offset from the left and right by a certain distance.

According to an aspect of the present invention, there is provided a stretchable double-ended tube having rigidity enhanced according to the present invention includes a left flange and a right flange separated from each other; A bellows 200 disposed between the left flange 100 and the right flange 110 to allow a length between the left flange 100 and the right flange 110 to be variable; A left setting log 120 and a right setting log 130 protruding outward from the left flange 100 and the right flange 110; A setting bolt 300 and a setting nut 400 which are provided between the left setting log 120 and the right setting log 130 to support the left setting log 120 and the right setting log 130 to be spaced apart from each other by a predetermined distance, ); The bellows 200 includes a protrusion 230 protruding outward to form a corrugation and a planar portion 240 having a plane corresponding to the flanges 100 and 110.

A shielding plate 232 for shielding one end of the protrusion 230 is coupled to an end of the protrusion 230.

The length of the planar portion 240 is smaller than the length of the protruding portion 230.

The planar portion 240 is formed at a different position from the adjacent planar portion 240.

The auxiliary protrusion 250 is formed on the flat surface portion 240 and corresponds to the shape of the protrusion 230. The auxiliary protrusion 250 is moved from the mounting position of the protrusion 230 by a predetermined distance And is formed at a position corresponding to the position.

The rigid reinforced concrete pipe according to the present invention has the following effects.

In the present invention, bellows are provided between the left and right flanges, and the shape of such bellows is formed close to a circle. That is, the wrinkles constituting the bellows are composed of a circular head portion and a neck portion having a small width on both sides. Therefore, there is an advantage that the bellows can be easily expanded and contracted when the left and right flanges expand and contract in the longitudinal direction.

In the present invention, a part of the bellows 200 having a circular band shape is cut. Therefore, the material cost is reduced and the rigidity in the longitudinal direction is strengthened.

Also, in the present invention, a part of the bellows 200 in the form of a strip is cut off so as to deviate from the one side by a predetermined distance. Therefore, it is possible to effectively cope with the elongation and contraction in the longitudinal direction, and also the rigidity in the longitudinal direction is enhanced.

In addition, in the present invention, the setting bolts are provided with elastic means so that the setting bolts can be easily extended or retracted laterally when the left and right flanges extend and contract in the longitudinal direction. Therefore, there is an advantage that the stretchability of the joint pipe is improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial cross-sectional view showing a configuration of a preferred embodiment of a stretchable eutectic tube having rigidity enhanced according to the present invention. Fig.
2 is a partially enlarged cross-sectional view showing a detailed structure of a bellows constituting an embodiment of the present invention.
3 is a partial cross-sectional view showing a detailed configuration of a setting bolt constituting an embodiment of the present invention.
4 is an exploded view showing another configuration of a bellows constituting an embodiment of the present invention;
5 is a partial perspective view of another configuration of the bellows constituting the embodiment of the present invention.
6 is an exploded view showing still another configuration of a bellows constituting an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a rigid reinforced expansion joint pipe according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a rigid reinforced rigid expansion tube according to an embodiment of the present invention. FIG. 2 is a partially enlarged cross-sectional view showing a detailed structure of a bellows constituting an embodiment of the present invention.

As shown in these drawings, the rigid reinforced extensible ear pipe according to the present invention includes a left flange 100 and a right flange 110 spaced apart from each other, The bellows 200 is provided between the left flange 100 and the right flange 110 so that the length between the left flange 100 and the right flange 110 can be varied. A left setting log 120 and a right setting log 130 and a left setting log 120 and a right setting log 130 are provided between the left setting log 120 and the right setting log 130, A setting bolt 300 and a setting nut 400 that are spaced apart from each other.

As shown in the figure, the left flange 100 has a cylindrical shape, and a portion projecting outward at a left end thereof is further formed with a coupling end to be in contact with an external pipe (not shown).

The right flange 110 has a structure symmetrical with the left flange 100. That is, the right flange 110 is provided at a position spaced a predetermined distance to the right of the left flange 100, and is connected to a right pipe (not shown) by a bolt or the like.

As shown in the figure, the bellows 200 is provided between the left flange 100 and the right flange 110 so as to buffer the left and right impacts. That is, when an external force is applied from the left side of the left flange 100 or the right side of the right flange 110, the length between the left flange 100 and the right flange 110 is variable, So as to relax the function.

The bellows 200 has a wrinkle shape in which protrusions 210 protruding outward and grooves 220 recessed inward are repeatedly formed.

Specifically, the bellows 200 has a structure in which the protrusions 210 and the grooves 220 are repeated so as to have a concavo-convex shape in the vertical direction.

The protrusions 210 and the grooves 220 are symmetrical to each other and have a circular cross section with one opening. In other words, as shown in the drawing, the protrusion 210 has a generally circular cross section and is downwardly opened. The groove 220 has a circular cross-section as a whole, do. Therefore, the protrusions 210 and the grooves 220 are symmetrical with respect to each other.

The protrusion 210 is composed of a head portion 212 protruding in a right and left direction and a neck portion 214 recessed inward in a right and left direction.

The left and right width dimensions of the head 212 are larger than the left and right width dimensions of the neck 214.

More specifically, as described above, the protrusion 210 includes a head 212 having a generally circular cross-section and a neck portion 212 connecting the head 212 to the flanges 100 and 110 214, etc., and the head 212 and the neck 214 are all formed to have rounded curvature. The neck portion 214 is integrally formed at the lower end of the head portion 212 and the right and left portions are formed in an inner side And has a rounded shape in an arc shape.

The left setting log 120 and the right setting log 130 are formed so as to protrude outward from the left flange 100 and the right flange 110. That is, the left setting log 120 is formed to protrude outward from the outer surface of the left flange 100 (upper side in FIG. 1 and FIG. 2), and the right setting log 130 is formed from the right flange 110 As shown in Fig.

The setting bolt 300 is provided between the left setting log 120 and the right setting log 130 as shown in the figure so that the left setting log 120 and the right setting log 130 are spaced apart from each other .

The setting bolts 300 are provided at positions where two or more of the flanges 100 and 110 are symmetrical to each other so that the left flange 100 and the right flange 110 are spaced apart from each other by a predetermined distance, .

The setting nut 400 is fastened to the setting bolt 300. That is, the setting nut 400 is provided at the left and right of the setting logs 120 and 130 and is screwed to the setting bolt 300, so that the interval between the left setting log 120 and the right setting log 130 As shown in FIG.

The reference numeral '500' is a sleeve.

3, the configuration of the setting bolt 300 is shown in detail in a sectional view. That is, the setting bolt 300 may be formed of one bolt, but may be constructed such that the right and left separate rods are coupled to each other.

Hereinafter, a case where the setting bolt 300 is constituted by right and left rods will be described as an example.

The setting bolt 300 includes a left rod 310 connected to the left setting log 120, a right rod 320 connected to the right setting log 130, And elastic means 330 for allowing one end of the rod 320 to slide and flow in contact with each other.

The left rod 310 is formed in a cylindrical shape as shown in FIG. The right rod 320 is formed in a cylindrical shape like the left rod 310 and has a predetermined length in the right and left direction.

The left rod 310 and the right rod 320 may have the same diameter but the outer diameter of the right rod 320 is larger than the outer diameter of the left rod 310 .

The resilient means 330 has a function of making the setting bolts 300 elastic so that the length of the setting bolts 300 can be changed left and right. That is, the elastic means 330 is structured such that the right end of the left rod 310 and the left end of the right rod 320 are slidingly overlapped with each other by a certain distance.

The elastic means 330 includes a pipe portion 332 for forming a connecting space 332 'having a predetermined size therein, a cover 334 for blocking one end of the pipe portion 332, A main spring 336 provided in the connection space 332 'to elastically apply force to move the right rod 320 and the left rod 310 away from each other, And an auxiliary spring 338 that applies elasticity to the left rod 310 so as to overlap with each other.

The pipe portion 332 is formed at the left end of the right rod 320 as shown in the figure, and a connecting space 332 'having a predetermined size is formed therein. Therefore, the springs 336 and 338 are installed in the connection space 332 '.

The cover 334 closes the inside of the pipe portion 332. That is, the cover 334 is provided at the left end of the pipe portion 332 to shield the opened left end of the pipe portion 332. The cover 334 is coupled to the pipe portion 332 by screwing.

As shown in the figure, the main spring 336 is provided in the connection space 332 'so that the right rod 320 and the left rod 310 are elastically moved away from each other. That is, the main spring 336 is composed of a compression spring and pushes the left rod 310 and the right rod 320 with elastic force.

The auxiliary spring 338 is installed on the outer surface of the right end of the left rod 310 to elastically apply the right rod 320 and the left rod 310 to overlap each other. That is, the auxiliary spring 338 acts to urge the left rod 310 and the right rod 320 so as to be close to each other, as opposed to the main spring 336.

The right end of the left rod 310 is further provided with an engagement protrusion 312 and an inner protrusion 314 for mounting the main spring 336 and the auxiliary spring 338.

As shown in the drawing, the latching end 312 is formed at the right end of the left rod 310 and forms a jaw having an outer diameter larger than the outer diameter of the left rod 310. Accordingly, the latching end 312 supports the left end of the main spring 336, and supports the right end of the auxiliary spring 338.

The inner protrusion 314 is a protrusion protruded to the right from the center of the right end of the left rod 310 as shown. Therefore, the inner protrusion 314 is accommodated in the left side of the main spring 336 to support the main spring 336.

The cover 334 is coupled to the left end of the pipe portion 332 so that the auxiliary spring 338 is positioned between the cover 334 and the locking end 312.

On the other hand, on the left end of the right rod 320, an outer protrusion 322 protrudes to the left.

The outer protrusion 322 is formed to be symmetrical with the inner protrusion 314 and serves to support the right end of the main spring 336. That is, the outer protrusion 322 protrudes to the left at the right end of the connection space 332 ', and the outer protrusion 322 is received at the center of the right end of the main spring 336.

4 is an exploded view showing another configuration of the bellows 200. As shown in FIG. That is, the bellows 200 has a band shape corresponding to the shape of the flanges 100 and 110 having a pipe shape. A part of the bellows 200 is formed in the same plane as the outer surface of the flanges 100 and 110 And FIG. 4 is an exploded view showing the configuration of the bellows 200.

As shown in the figure, the bellows 200 includes a protrusion 230 protruding outward to form a corrugation, and a plane portion 240 having a plane corresponding to the flanges 100 and 110.

The protrusion 230 corresponds to the protrusion 210 described above. That is, the flange protrudes outward to form a corrugation, and the flat portion 240 is a flat portion like the outer surface of the flanges 100 and 110.

The length of the planar portion 240 (the length in the vertical direction in FIG. 4) is smaller than the length of the protruding portion 230. That is, as shown in the drawing, the length of the flat portion 240 is formed to be 1/4 of the length of the protrusion 230.

This is to take advantage of the elasticity of the bellows 200. That is, when the length of the plane portion 240 is excessively long, the left and right stretching function is reduced and the buffering function of the bellows 200 is reduced. When the plane portion 240 is too small, And the effect of strengthening the rigidity is weakened due to weak external shock.

Meanwhile, the planar portion 240 is formed at a different position from the adjacent planar portion 240. That is, as shown in the drawing, the positions of the planar portions 240 in the rows of the protruding portions 230 and the planar portions 240 are different from each other. For example, as shown in FIG. 4, the flat portion 240 of one row is formed at the lowermost end (in FIG. 4), but the two flat portions 240 are formed at the uppermost end (in FIG. 4).

FIG. 5 is a partial perspective view of another configuration of the bellows 200 shown in FIG. 5, the end of the protrusion 230 is shown in a perspective view.

As shown in the figure, a shielding plate 232 for shielding one end of the protrusion 230 is coupled to an end of the protrusion 230. That is, the protrusion 230 protrudes in a round shape outwardly as the protrusion 210 described above, and the protrusion 230 is cut so that the shield plate 232 blocks the cut portion.

The shield plate 232 is preferably connected to the end of the protrusion 230 by welding or the like.

6 is an exploded view showing another configuration of the bellows 200. As shown in FIG. 5, the bellows 200 includes a protrusion 230 and a planar portion 240. The planar portion 240 is further provided with an auxiliary protrusion 250. [

More specifically, the flat portion 240 further includes an auxiliary protrusion 250 corresponding to the shape of the protrusion 230, and the shield plate 232 (described above) may be attached to both ends of the auxiliary protrusion 250, Is coupled to shield the inside of the auxiliary protrusion 250. That is, a shield plate 232 for shielding both ends of the protrusion 230 is attached to both ends of the auxiliary protrusion 250.

The auxiliary protrusion 250 is formed at a position shifted from the mounting position of the protrusion 230 by a predetermined distance. That is, as shown in the figure, the auxiliary protrusions 250 are spaced apart from the protrusions 230 to the right by a predetermined distance, and are installed to be offset from the protrusions 230 to the right.

This is to ensure that the bellows 200 effectively copes with expansion and contraction to the left and right, and further improves the rigidity with respect to external forces to the left and right.

Hereinafter, the operation of the rigid reinforced extension pipe according to the present invention will be described.

An external pipe (not shown) is coupled to the left flange 100 and the right flange 110 by bolts or the like.

In this state, when an external force is applied to an external pipe or the like, a leftward or rightward force is applied to the left flange 100 or the right flange 110. [

In this case, the left flange 100 or the right flange 110 will be moved to the left or right. Since the left and right pipes (not shown) are fixed, when the flanges 100 and 110 are not moved, The pipe (not shown) and the flanges 100 and 110 may be damaged.

At this time, the force exerted from the outside causes the bellows 200 to buffer. That is, since the bellows 200 is formed continuously of the protrusions 210 and the grooves 220 and the width of the head portion 212 is formed to be larger than the width of the neck portion 214, . That is, since the neck portion 214 is narrowly formed, the neck portion 214 becomes relatively narrower or wider relatively easily.

Since the setting bolts 300 are provided with the elastic means 330, the elastic force of the setting bolts 300 can be prevented by the elastic means 330 when the external force is applied or the joint pipe according to the present invention moves. Breakage of the flanges 100 and 110 is prevented.

More specifically, even when an external force is applied to the flanges 100 and 110 so that the left rod 310 and the right rod 320 are separated from each other or approach each other, the main springs 336 and the auxiliary springs 338 can buffer .

That is, when the left rod 310 and the right rod 320 are close to each other due to an external force, the left rod 310 and the right rod 320 are pushed by the elastic force of the main spring 336, It is alleviated.

When the left rod 310 and the right rod 320 try to move away from each other, the elastic force of the auxiliary spring 338 pushes the cover 334 and the latching end 312 to the left and right. do.

When the external force is canceled by the bellows 200 or the elastic means 330 to cancel the external force and then the external force is extinguished, the elastic force of the bellows 200 or the elastic means 330 causes the left flange 100 And the right flange 110 are returned to their original positions.

In addition, since the planar portion 240 and the shielding plate 232 are further provided in the other structure of the bellows 200, rigidity in the lateral direction is complemented.

The scope of the present invention is not limited to the above-described embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.

For example, in the above embodiment, the shape of the shielding plate 232 is a circular shape corresponding to the protrusion 210. However, the shielding plate 232 may be formed on the protrusion 210 or the protrusion 230, Of course, be deformed into different shapes in correspondence with the shape of the base.

100. Left flange 110. Right flange
120. Left setting log 130. Right setting log
200. Bellows 210. Projection
212. Head 214. Thigh
220. Groove 230. Projection
232. Shield plate 240. Planar section
250. Auxiliary protrusion 300. Setting bolt
310. Left Load 320. Right Load
330. Elastic means 332. Pipe section
334. Cover 336. Main Spring
338. Auxiliary spring 400. Setting nut
500. Sleeve

Claims (3)

A left flange 100 and a right flange 110 formed to be spaced apart from each other in the left-right direction;
A bellows 200 formed as a plurality of rows between the left flange 100 and the right flange 110 to allow a length between the left flange 100 and the right flange 110 to be variable;
A left setting log 120 and a right setting log 130 protruding outward from the left flange 100 and the right flange 110;
A setting bolt 300 and a setting nut 400 which are provided between the left setting log 120 and the right setting log 130 to support the left setting log 120 and the right setting log 130 to be spaced apart from each other by a predetermined distance, );
The bellows (200)
A protrusion 230 protruding outward to form a corrugation and a plane portion 240 having a plane corresponding to an outer surface of the left and right flanges 100 and 110;
A shielding plate 232 for shielding one end of the protrusion 230 is coupled to an end of the protrusion 230. The length of the protrusion 230 is 1/4 of the length of the protrusion 230, And the planar portions 240 of each row are formed at different positions from each other;
The planar portion 240 further includes an auxiliary protrusion 250 corresponding to the shape of the protrusion 230;
The auxiliary protrusion 250 is formed at a position shifted from the mounting position of the protrusion 230 by a predetermined distance and the shield plate 232 is coupled to both ends of the auxiliary protrusion 250, Shielding the interior;
The setting bolt (300)
A left rod 310 connected to the left setting log 120 and a right rod 320 connected to the right setting log 130. One end of the left rod 310 and the right rod 320 are connected to each other, And resilient means (330) for contacting and slidingly flowing therethrough;
The left rod 310 and the right rod 320 are formed in a columnar shape and the outer diameter of the right rod 320 is larger than the outer diameter of the left rod 310;
The elastic means (330)
A cover 334 for covering one end of the pipe portion 332 and a cover 334 for covering the connection portion 332 ' A main spring 336 for elastically urging the right rod 320 and the left rod 310 to move away from each other and a right spring 320 which is provided in the connection space 332 ' And a supplementary spring (338) for applying elasticity to the reinforcement spring (338). delete delete
KR1020150142022A 2015-10-12 2015-10-12 Connecting pipe with more strength KR101636267B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0328686U (en) * 1989-07-31 1991-03-22
KR200197257Y1 (en) * 2000-04-06 2000-09-15 포항종합제철주식회사 Tie-rod elastic pipe
JP2001521122A (en) * 1997-10-29 2001-11-06 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Variable rigid bellows
JP2004506144A (en) * 2000-06-30 2004-02-26 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Flexible tube with variable stiffness bellows
KR100631141B1 (en) 2006-02-17 2006-10-04 메가플랙슨공업(주) Bellows type ptfe expansion joint and process for preparing same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0328686U (en) * 1989-07-31 1991-03-22
JP2001521122A (en) * 1997-10-29 2001-11-06 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Variable rigid bellows
KR200197257Y1 (en) * 2000-04-06 2000-09-15 포항종합제철주식회사 Tie-rod elastic pipe
JP2004506144A (en) * 2000-06-30 2004-02-26 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Flexible tube with variable stiffness bellows
KR100631141B1 (en) 2006-02-17 2006-10-04 메가플랙슨공업(주) Bellows type ptfe expansion joint and process for preparing same

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