KR20140114159A - Connecting structure and connecting method for metallic corrugated tube - Google Patents

Connecting structure and connecting method for metallic corrugated tube Download PDF

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Publication number
KR20140114159A
KR20140114159A KR1020130028640A KR20130028640A KR20140114159A KR 20140114159 A KR20140114159 A KR 20140114159A KR 1020130028640 A KR1020130028640 A KR 1020130028640A KR 20130028640 A KR20130028640 A KR 20130028640A KR 20140114159 A KR20140114159 A KR 20140114159A
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KR
South Korea
Prior art keywords
circumferential surface
metal
stop ring
connecting body
polished
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KR1020130028640A
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Korean (ko)
Inventor
신화옥
Original Assignee
신화옥
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Application filed by 신화옥 filed Critical 신화옥
Priority to KR1020130028640A priority Critical patent/KR20140114159A/en
Publication of KR20140114159A publication Critical patent/KR20140114159A/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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/04—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection
    • F16L19/043—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection with additional sealing means
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
    • F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F17D1/04—Pipe-line systems for gases or vapours for distribution of gas

Abstract

The present invention relates to a connecting structure for a metallic corrugated tube and a connecting method thereof, which can surely prevent leakage of a fluid by sealing and connecting an end of a metallic corrugated tube with a connecting body in an airtight manner. The connecting structure for a metallic corrugated tube comprises: a metallic corrugated tube which has a polished tilting surface on the inner circumferential surface at an end thereof; a fastening nut which is placed on the outer side of the metallic corrugated tube and includes female threads on the inner circumferential surface; a stop ring which is adjacent to the polished tilting surface of the metallic corrugated tube, whose inner circumferential surface adheres to the outer circumferential surface of the metallic corrugated tube, and whose outer circumferential surface adheres to the inner circumferential surface of the fastening nut; and a connecting body where an adhering tilting surface is formed at an end to adhere to the polished tilting surface of the metallic corrugated tube, and where the fastening nut is combined with the outer circumferential surface adjacent to the adhering tilting surface. A sealing groove unit is formed on the adhering tilting surface of the connecting body while a heat-resistant sealing member is installed in the groove unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a metal corrugated pipe connection structure,

More particularly, the present invention relates to a metal bellows pipe connecting structure and a connecting method thereof. More particularly, the present invention relates to a metal bellows pipe connecting structure and a connecting method thereof, To a corrugated pipe connecting structure capable of reliably preventing loosening of a joined body and a method of connecting the same.

As is well known, the corrugated pipe has a corrugated structure in which the mountains and the corrugations are continuous at a constant pitch, so that the flexibility and the bonding property are very good. Such a corrugated pipe has a coating layer of synthetic resin formed on the outside thereof and is widely used for various piping.

In the case of using a high temperature gas such as a boiler, an oven, a dryer, a heater, etc., a metal corrugated pipe having heat resistance is often used as a gas supply pipe to stably transfer a high temperature gas. Since such a metal corrugated pipe is directly connected to a combustor such as a boiler, it is made of a stainless steel material having excellent heat resistance so as to withstand high temperatures directly generated in a combustor.

Various types of metal corrugated pipe connection structures that can reliably prevent leakage of fluids such as gas and oil pressure in the portions where the metal corrugated pipes are connected are used.

The metal wrinkle pipe connection structure is connected to the connecting body to be connected by a tightening nut, and when the tightening nut is tightened, the end portion thereof is compressed and deformed by the connecting body, so that the airtightness between the end portion of the metal wrinkle pipe and the connecting body is maintained.

As a conventional metal corrugated pipe connection structure, a Japanese Patent Registration No. 10-182371 (entitled " Corrugated pipe connection structure ") is disclosed.

Such a conventional metal corrugated pipe connecting structure is composed of a metal corrugated pipe, a tightening nut located on the outside of the metal corrugated pipe, an engaging ring provided on the valley portion of the metal corrugated pipe and engaged with the tightening nut, A packing member which is interposed between the end portion of the metal corrugated pipe and the connecting body to compress and deform the end portion of the metal corrugated pipe and which seals the end portion of the metal corrugated pipe and the connecting body.

On the other hand, a packing member made of a metal used in a conventional metal pneumatic tube connection structure has a structure having an inclined surface, an inner circumferential surface, and an outer circumferential surface, and the packing member is configured to press-deform the end of the metal pneumatic tube.

However, when the end portion of the metal corrugated tube is compressed and deformed by the inclined surface of the packing member, the compressive deformation force is not so large that airtightness is not ensured between the inclined surface of the packing member and the end of the metal corrugated tube, / It is difficult to control under a small amount due to under leakage, and it is difficult to ensure the practical sealing property and thus the safety is difficult.

Namely, since the end portion of the metal bellows tube is not compressed and deformed in an airtight manner in correspondence with the inclined surface of the packing member, there is a leakage gap between the inclined surface of the packing member and the end of the metal bellows tube, There were different disadvantages.

In addition, since the conventional metal corrugated pipe connection structure has to be manufactured in a complicated structure such that the packing member has an inclined surface, an inner circumferential surface, and an outer circumferential surface, there is a disadvantage that the parts cost is increased due to the purchase of the packing member, .

Also, since the conventional metal corrugated pipe connection structure has a great flexibility and fluidity, the flow fluctuation of the fluid is high. Therefore, leakage due to loosening between the connection member and the nut of the metal corrugated pipe connection structure due to the impact force and the load due to the high- It was hindered.

Patent No. 10-1182371

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide an air- And the fluid flow fluctuation is high between the connecting body and the nut of the connection structure of the metal corrugated pipe and the flow fluctuation of the fluid is severe and the safety due to the impact force and the load due to the high temperature heat and the pressing force is leaked and loosened The present invention provides a corrugated pipe connecting structure and a method of connecting the same.

According to an aspect of the present invention, there is provided a metal-

A metal corrugated pipe having an inclined surface polished on an end peripheral inclined surface;

A tightening nut disposed outside the metal bellows tube and having a female threaded portion formed on an inner circumferential surface thereof;

A stop ring adjacent to the polished slope of the metal bellows tube, the inner circumferential surface being in close contact with the outer circumferential surface of the metal bellows tube, and the outer circumferential surface being in close contact with the inner circumferential surface of the tightening nut; And

And a connecting body having an end portion formed with an adhered slant surface which is in close contact with the polished slant surface of the metal bellows pipe and a tightening nut coupled to an outer circumferential surface adjacent to the adhered slant surface,

And a heat-resistant sealing member is provided in the groove portion.

And one or a plurality of grooves for allowing contraction and expansion are formed in the circumferential direction on the close contact surface of the connecting body.

The stop ring is formed in a ring structure having a cut-out portion at one side thereof, and is inserted into the valley portion of the corrugated pipe and is tightly coupled by compression bonding.

Wherein the heat-resistant sealing member has a sectional structure in which two or more curved surfaces protrude from the sealing groove.

The contact inclined surface of the connecting body and the polished inclined surface of the metal corrugated tube may have the same inclination angle and the angle of the inclined surface may vary within a range of 0.5 to 3 degrees depending on workability and the surrounding environment.

A metal corrugated pipe cutting step of cutting the metal corrugated pipe to a predetermined length,

A stop ring and a tightening nut assembly step for fitting a stop ring and a tightening nut into the outer peripheral surface of the metal bellows pipe,

A stop ring pressing step of pressing the stop ring so as to be in close contact with the outer peripheral surface adjacent to the end portion of the metal bellows pipe,

An end inner circumferential surface polishing step of the metal corrugated tube for forming the polished sloped surface by polishing the inner circumferential surface of the end portion of the metal corrugated tube with a polishing tip,

Wherein the close contact surface of the connecting body is formed with a sealing groove and is assembled so that the end of the connecting body is in close contact with the polished surface of the metal bellows.

In the step of assembling the stop ring and the tightening nut, a stop ring having a cut-out portion is inserted in the valley portion of the outer circumferential surface adjacent to the end of the metal bellows tube, and a tightening nut having a female thread portion is inserted into the outer circumferential surface of the metal bellows after the stop ring is inserted .

The stop ring inserted into the end portion of the metal bellows tube is compressed by the compression bonding mechanism so that the stop ring is brought into tight contact with the bony portion of the outer circumferential surface adjacent to the end portion of the metal bellows tube.

After the metal bellows pipe is fixed by the chucking mechanism with the end of the metal bellows pipe exposed to the outside in the step of polishing the end surface of the metal bellows pipe, Is formed.

In the connecting member assembling step, an adhesive slope is formed on the outer circumferential surface of the end portion of the connecting body, a male screw portion is formed on the outer circumferential surface adjacent to the closing sloping surface, and the male screw portion of the connecting body is screwed to the female screw portion of the connecting nut, And the slanted surface of the metal corrugated tube is brought into close contact with the close-

A heat-resistant sealing member is provided on the close contact surface of the connecting body, and the heat-resistant sealing member is interposed between the close contact surface of the connecting body and the polished surface of the metal bellows pipe.

According to the present invention, it is possible to maintain the airtightness of the connection structure without using a packing member at the end portion and the connecting body of the corrugated pipe, thereby preventing leakage of the fluid and controlling the flow fluctuation width of the fluid, ), And the fluid flow fluctuates greatly due to the flexibility and fluidity between the connecting body and the nut of the metal corrugated pipe connection structure, and leakage and loosening are repeated due to the impact force and the load due to the high-temperature heat and the pressing force There is an advantage to prevent the deterioration in safety.

It is possible to secure the airtightness of the connecting body and the metal corrugated tube by sealing the inner peripheral surface of the end portion of the metal corrugated tube by polishing to form a polishing inclined surface and tightly adhering the close contact inclined surface of the connecting body to the inclined polishing surface, The heat-resistant sealing member is interposed between the polished slopes of the corrugated pipe, thereby preventing repetitive loosening and controlling the occurrence of leakage gaps to maintain safety.

Further, since the heat-resistant sealing member is made of a material capable of withstanding a high temperature of 200 to 300 DEG C, the present invention is advantageous in that the heat-resistant sealing member can stably adhere to the polishing slope of the metal corrugated tube by its frictional force,

In addition, the present invention is advantageous in that the assembly structure of the heat-resistant sealing member is provided on the close slant surface of the connection body, and the cost of the metal corrugated pipe connection operation as a whole due to the reduction of the component cost can be reduced.

1 is a perspective view illustrating a metal corrugated pipe connection structure according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view illustrating the metal corrugated pipe connection structure according to FIG. 1. FIG.
3 is an exploded perspective view illustrating a metal corrugated pipe connection structure according to the present invention.
FIG. 4 is a cross-sectional side view showing a connection structure of the metal corrugated pipe according to FIG. 3; FIG.
5 is an exploded side cross-sectional view showing a modified embodiment of Fig.
6 is a process diagram illustrating a method for connecting a metal corrugated pipe according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of convenience, the size, line thickness, and the like of the components shown in the drawings referenced in the description of the present invention may be exaggerated somewhat. The terms used in the description of the present invention are defined in consideration of the functions of the present invention, and thus may be changed depending on the user, the intention of the operator, customs, and the like. Therefore, the definition of this term should be based on the contents of this specification as a whole.

1 to 4 are views showing a metal corrugated pipe connection structure according to an embodiment of the present invention.

As shown in the figure, the metal corrugated pipe connecting structure according to the present invention includes a metal corrugated pipe 11 having a polished sloped surface 11a formed on the inner peripheral surface of the end portion thereof, a tightening nut 12 disposed outside the metal corrugated pipe 11, A stop ring 13 closely attached to an outer peripheral surface adjacent to the end of the metal corrugated tube 11 and a connecting body 14 having an inclined surface 14a tightly adhered to the polished sloped surface 11a of the metal corrugated tube 11. [

The metal corrugated tube 11 is formed to have a corrugated structure in which a plurality of valleys and apices are continuously connected and is formed so that an inclined surface 11a polished by polishing is formed on the inner peripheral surface of the end of the metal corrugated pipe 11. [ The outer surface of the metal corrugated tube 11 may be covered with a coating layer of synthetic resin.

The tightening nut 12 is disposed on the outer side of the metal bellows pipe 11 and the female screw portion 12b is formed on the inner circumferential surface of the tightening nut to be screwed to the male screw portion 14b formed on the outer side of the connecting body 14.

The stop ring 13 is formed in a ring structure having a cutout 13a at one side thereof and is provided on the outer peripheral surface adjacent to the polished slanted surface 11a of the metal corrugated tube 11. [ The inner circumferential surface of the stop ring 13 is inserted into the valley portion of the outer circumferential surface adjacent to the polished sloped surface 11a of the metal corrugated pipe 11 and then pressed against the outer circumferential surface of the metal corrugated pipe 11 by the compression mechanism, Tightly adhere the connecting body and the nut to each other. The outer circumferential surface of the stop ring 13 is brought into close contact with the inner circumferential surface of the tightening nut 12, so that the sealing ability and the supporting force between the stop ring 13 and the tightening nut 11 can be ensured.

The connecting body 14 has an adhered slant face 14a at one end and the adhered slant face 14a is brought into close contact with the polished slanted face 11a of the metal corrugated pipe 11. [ Preferably, the angle between the close contact slope 14a of the connector 14 and the polished slope 11a of the metal bellows 11 maintains the same inclination angle (10 to 40 degrees) to maintain airtightness, The angle of the polished sloped surface of the metal corrugated pipe and the angle of the close contact sloped surface of the connecting body can be varied within a range of 0.5 to 3 degrees.

The tight contact surface 14a of the connection member 14 and the polished sloped surface 11a of the metal corrugated pipe 11 are more closely contacted with each other so that a certain amount of fluid can flow freely without resistance.

A male screw portion 14b is screwed and connected to the female screw portion 12b of the tightening nut 12 on the outer circumferential surface of the connecting body 14, particularly on the outer peripheral surface adjacent to the tightly inclined surface 14a. As the male screw portion 14b of the connecting body 14 is screwed to the female screw portion 12b of the tightening nut 12, the close slant face 14a of the connecting body 14 is brought into contact with the polished slanted face of the metal corrugated pipe 11 11a in an air tight manner.

The tilting surface 14a of the connecting body 14 is formed with a shrinking expansion groove 16 for allowing contraction and expansion in the circumferential direction and the shrinking expansion groove 16 is formed to be inclined along the contact slope 14a Even if the tightly inclined face 14a of the connecting body 14 contracts or expands due to heat, pressure, or impact generated from a high-temperature fluid such as a gas or the like, it flows through the contraction dilation groove 16 of the tightly- It is possible to prevent leakage and loosening of the fluid due to damage or breakage due to the screw coupling.

It should be noted that the shrinking and expanding groove portions 16 may be provided in one or a plurality of circumferential directions and may also be arranged in a spiral direction.

An annular sealing groove portion 14c is formed in the circumferential direction in addition to the shrinking expansion groove portion 16 in the close contact slope 14a of the connector 14 so that an annular heat resistant sealing member 15 is provided, Since the polished slope 11a of the corrugated pipe 11 is closely contacted by the elastic force, the airtightness is improved and the adhesion to the metal corrugated tube is improved, so that the force acting in the horizontal direction can be canceled. The sealing groove portion 14c may be provided with various shapes.

Particularly, since the heat-resistant sealing member 15 is made of a material having flexibility and friction such as rubber, when the heat-resistant sealing member 15 is in close contact with the polished sloped surface 11a of the metal corrugated tube 11, the heat-resistant sealing member 15 Is attached to the polished sloped surface 11a of the metal corrugated pipe 11 by the frictional force of the metal corrugated pipe 11 so that the connected member 14 is more firmly and stably joined to the polished sloped surface 11a of the metal corrugated pipe 11, Can be effectively prevented.

The heat-resistant sealing member 15 has a structure in which a heat-resistant coating layer such as Teflon, Viton, silicone rubber, fluorine resin, NBR, fluorine rubber, aramid or the like is sufficiently coated to withstand a high temperature of 200 to 300 ° C.

According to one embodiment, the heat-resistant sealing member 15 may have a circular cross section as shown in the enlarged view of FIG.

According to an alternative embodiment, the heat-resistant sealing member 15 may have a sectional structure in which two or more curved portions 15a and 15b protrude from the sealing groove 14c as shown in an enlarged view of Fig. When two or more curved surfaces 15a and 15b are in close contact with the polished sloped surface 11a side of the metal corrugated pipe 11, The elasticity, the sealability, and the holding force between the close contact slope 14a of the metal corrugated pipe 11 and the polished slope face 11a of the metal corrugated pipe 11 can be greatly increased.

6 is a process diagram illustrating a method for connecting a metal corrugated pipe according to an embodiment of the present invention.

As shown in the figure, the method for connecting a metal corrugated pipe according to the present invention comprises a metal corrugated pipe cutting step S1 for cutting a metal corrugated pipe 11 to a predetermined length, a stop ring 13 on the outer circumferential surface of the metal corrugated pipe 11, A stop ring pressing step S3 for pressing the stop ring 13 and the stop ring 13 against the outer circumferential surface adjacent to the end of the metal corrugated tube 11, (Step S4) of polishing the end inner circumferential surface of the metal bellows to form the polished beveled surface 11a by grinding the end inner circumferential surface of the metal bellows tube 11 with the abrasive tip and the step of polishing the end inner circumferential surface of the metal bell tube 11 And a coupling assembly step S5 of assembling the polished slope 11a so as to adhere the end of the coupling member 14 closely.

In the metal bellows pipe cutting step (S1), the metal bellows pipe (11) is precisely cut to a predetermined length by a cutting mechanism while feeding it in the longitudinal direction.

The inner circumferential surface of the stop ring 13 in which the cutout portion 13b is formed is inserted into the valley portion of the outer circumferential surface adjacent to the end portion of the metal corrugated pipe 11 in the stop ring and the tightening nut assembling step S2, The stop ring 13 and the tightening nut 12 are assembled to the end of the metal corrugated pipe 11 by fitting the tightening nut 12 formed with the female thread 12b into the outside of the metal corrugated pipe 11. [

The stop ring 13 inserted in the end portion of the metal corrugated pipe 11 is pressed by the compression mechanism in the stop ring pressing step S3 so that the stop ring 13 is formed in the valley portion of the outer circumferential surface adjacent to the end portion of the metal corrugated pipe 11. [ Tightly.

The metal corrugated tube 11 is fixed by the chucking mechanism in a state where the end of the metal corrugated tube 11 to which the stop ring 13 is compressed is exposed to the outside in the step of polishing the inner circumferential surface of the end of the metal corrugated tube. Then, the inner peripheral surface of the end portion of the metal corrugated pipe 11 is polished obliquely by the polishing tip of the polishing mechanism to form the polished oblique surface 11a.

In the connecting body assembling step S5, the connecting body 14 is formed with an adhered slant face 14a on the outer circumferential face of the end portion thereof, and a sealing groove is formed on the contact slant face thereof. On the outer circumferential face adjacent to the adherent slant face 14a, (14b) are formed. The threaded portion 14b of the connecting member 14 is screwed to the female threaded portion 12b of the tightening nut 12 so that the contacted slanted face 14a of the connecting body 14 and the polished slanted face 11a of the metal corrugated pipe 11 ).

When the connecting body 14 is assembled to the side of the tightening nut 12 as described above, the heat-resistant sealing member (interposed between the close-contact inclined face 14a of the connector 14 and the polished incline 11a of the metal corrugated pipe 11) 15, the sealing properties can be reliably ensured.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

11: metal corrugated pipe 11a: polished slope surface
12: tightening nut 12b: female thread part
13: stop ring 13a:
14: connecting body 14a: close slope
14b: male thread portion 15: heat-resistant sealing member
16: shrinkage expansion groove

Claims (10)

A metal corrugated pipe having an inclined surface polished on an end peripheral inclined surface;
A tightening nut disposed outside the metal bellows tube and having a female threaded portion formed on an inner circumferential surface thereof;
A stop ring adjacent to the polished slope of the metal bellows tube, the inner circumferential surface being in close contact with the outer circumferential surface of the metal bellows tube, and the outer circumferential surface being in close contact with the inner circumferential surface of the tightening nut; And
And a connecting body having an end portion formed with an adhered slant surface which is in close contact with the polished slant surface of the metal bellows pipe and a tightening nut coupled to an outer circumferential surface adjacent to the adhered slant surface,
Wherein a sealing slope is formed in the close contact surface of the connecting body, and a heat-resistant sealing member is provided in the recess.
The method according to claim 1,
Wherein one or a plurality of grooves for allowing contraction and expansion are formed in a circumferential direction on the close contact surface of the connecting body.
The method according to claim 1,
Wherein the stop ring is formed in a ring structure having a cut-out portion at one side thereof, and is inserted into the valley portion of the corrugated pipe so as to be closely contacted by compression.
The method according to claim 1,
Wherein the heat-resistant sealing member has a cross-sectional structure in which two or more curved surfaces protrude from the sealing groove.
The method according to claim 1,
Characterized in that an inclined surface of the connecting body and a polished sloped surface of the metal corrugated pipe can have the same inclination angle and the angle of the inclined surface can vary within a range of 0.5 to 3 degrees due to workability and the surrounding environment. rescue.
A metal corrugated pipe cutting step of cutting the metal corrugated pipe to a predetermined length,
A stop ring and a tightening nut assembly step for fitting a stop ring and a tightening nut into the outer peripheral surface of the metal bellows pipe,
A stop ring pressing step of pressing the stop ring so as to be in close contact with the outer peripheral surface adjacent to the end portion of the metal bellows pipe,
An end inner circumferential surface polishing step of the metal corrugated tube for forming the polished sloped surface by polishing the inner circumferential surface of the end portion of the metal corrugated tube with a polishing tip,
Wherein the tightening slope of the connecting body is formed with a sealing groove and assembled so that the end of the connecting body is in close contact with the polished slope of the metal bellows pipe.
The method of claim 6,
In the step of assembling the stop ring and the tightening nut, a stop ring having a cut-out portion is inserted in the valley portion of the outer circumferential surface adjacent to the end of the metal bellows tube, and a tightening nut having a female thread portion is inserted into the outer circumferential surface of the metal bellows after the stop ring is inserted Wherein the metal corrugated pipe connection method comprises:
The method of claim 6,
Wherein a stop ring inserted in an end portion of the metal bellows pipe is pressed and attached by a compression mechanism in the stop ring pressing step to tightly attach the stop ring to the bony portion of the outer circumferential surface adjacent to the end portion of the metal bellows pipe, .
The method of claim 6,
After the metal bellows pipe is fixed by a chucking mechanism in a state in which the end portion of the metal bellows pipe is exposed to the outside in the step of polishing the inner peripheral surface of the end portion of the metal bellows tube, the inner peripheral surface of the end portion of the metal bellows tube is inclinedly polished by the polishing tip, Wherein the metal corrugated pipe connection member is formed with a plurality of through holes.
The method of claim 6,
In the connecting member assembling step, an adhesive slope is formed on the outer circumferential surface of the end portion of the connecting body, a male screw portion is formed on the outer circumferential surface adjacent to the closing sloping surface, and the male screw portion of the connecting body is screwed to the female screw portion of the connecting nut, And the slanted surface of the metal corrugated tube is brought into close contact with the close-
Wherein a heat-resistant sealing member is provided on the close contact surface of the connecting body, and the heat-resistant sealing member is interposed between the close contact surface of the connecting body and the polished surface of the metal bellows pipe.
KR1020130028640A 2013-03-18 2013-03-18 Connecting structure and connecting method for metallic corrugated tube KR20140114159A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107763333A (en) * 2016-08-23 2018-03-06 开平市华灵管业有限公司 Universal pipe
WO2018155971A1 (en) * 2017-02-24 2018-08-30 주식회사 두본후렉시블 Metal corrugated pipe having flare joint part, and processing apparatus and production method therefor
KR20190120468A (en) 2018-04-13 2019-10-24 (주)티엘파이프 Sealing connecting structure of corrugated pipe for gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107763333A (en) * 2016-08-23 2018-03-06 开平市华灵管业有限公司 Universal pipe
WO2018155971A1 (en) * 2017-02-24 2018-08-30 주식회사 두본후렉시블 Metal corrugated pipe having flare joint part, and processing apparatus and production method therefor
KR20190120468A (en) 2018-04-13 2019-10-24 (주)티엘파이프 Sealing connecting structure of corrugated pipe for gas

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