KR101256966B1 - Liquid and gas leakege preventing apparatus, carving member and method for preventing liquid and gas leakege using the apparatus and carving member - Google Patents

Abstract

PURPOSE: A leakage preventing device for liquid and gas, a carving member applying to the same, and a leakage preventing method thereof are provided to fill a gap between a pair of couplers and a welded portion with a bonder or insert a sealing member into the gap, thereby securing the airtightness of the welded portion. CONSTITUTION: A leakage preventing device for liquid and gas includes a first and a second couplers(10,20), a sealing unit, and multiple fastening units(41a-41d). The first and the second couplers cover the welded portion of a pipe(1), and are detachably mounted on the pipe. The sealing units are placed between the first and the second couplers and the welded portion of a pipe. The sealing units are pressurized by coupling the first and the second couplers, and closely adhere to the welded portion. The fastening units mutually fasten the first and the second couplers. The first and the second couplers respectively have concave grooves(11) formed along the inner circumferential surfaces of the first and the second couplers. The sealing units fill the concave grooves or are inserted into the concave grooves.

Description

LIQUID AND GAS LEAKEGE PREVENTING APPARATUS, CARVING MEMBER AND METHOD FOR PREVENTING LIQUID AND GAS LEAKEGE USING THE APPARATUS AND CARVING MEMBER}

The present invention relates to a liquid and gas leak prevention apparatus, a carbing member applied to the apparatus and a liquid and gas leak prevention method using the same, and particularly to prevent the liquid or gas from leaking by the gold generated at the welded portion of the pipe. The present invention relates to a device for securing a sealing material in a uniform thickness to a device, and a method for preventing liquid and gas leakage using the same.

In general, the fluid or gas pipeline is connected to the pipe mainly by welding. In this case, when the pipes are interconnected by welding, residual stresses due to welding are generated at the welded portions. This residual stress acts as a factor in forming cracks in the welded area in the long term.

Conventionally, when cracks are generated in a welded portion and a leak or a liquid or gas is expected or caused, a measure of applying a sealing tape or an epoxy bonder to the welded portion has been taken.

However, in this case, since the sealing tape is not completely adhered to the welding part, the lifting part occurs, and thus, it was difficult to maintain the airtightness.

In addition, in the case of epoxy bonding, when the operator's skill is low, the bonder is often applied to a non-uniform thickness, and thus, there is a problem that quality stability cannot be guaranteed. When a certain amount of bonder is removed due to contact by a worker or equipment, there is a problem in that the desired bonder performance cannot be expected.

In order to solve the above problems, the present invention, but a pair of couplers mounted on the pipe to surround the welded portion of the pipe, filling the bonder or a sealing member between the paired coupler and the welded portion by sealing the airtightness of the welded portion It is an object of the present invention to provide a liquid and gas leak preventing device that can be secured, a carbing member applied to the device and a liquid and gas leak preventing method using the same.

In order to achieve the above object, the present invention, the first and second coupler detachably mounted to the pipe while surrounding the welded portion of the pipe; Sealing means positioned between the inside of the first and second couplers and the welded portion of the pipe, the sealing means being in close contact with the welded portion of the pipe in a pressed state by coupling between the first and second couplers; And a plurality of fasteners for fastening the first and second couplers to each other, wherein the first and second couplers each have a recess in which the sealing means is filled or inserted along an inner circumferential surface thereof. Provide liquid and gas leak prevention devices.

The sealing means may be made of an epoxy bonder having a viscosity.

The first and second couplers are provided with at least one of both sides of the grooves more than the depth of the grooves so as to provide a space through which some of the epoxy bonders filled in the grooves may flow in when the first and second couplers are mounted on the pipes. It can form a shallow secondary groove.

The first and second couplers may have semi-circular contact portions in contact with the surface of the pipe on both sides of the groove, and each of the contact portions may include a sealing protrusion.

The grooves of the first and second couplers may include bottom surfaces that are concave and convex in a wavy pattern.

The sealing means may be formed of first and second members made of an elastic body, and the first and second members may be formed in a cylindrical shape so as to surround the welded portion of the pipe when mutually engaged.

Preferably, the first and second members are each formed with grooves through which the welded portions of the pipes can be recessed. In this case, the first and second members may be formed along at least one sealing protrusion along an inner circumferential surface on both sides of the groove.

The first and second members may be formed such that the contact surfaces of the portions in contact with each other are inclined.

The first and second couplers may further include a sealing groove surrounding the groove, and the sealing groove may be filled with the bonder. The sealing groove may be made of at least two, and the two or more sealing grooves may be overlapped. The cross-sectional shape of the sealing groove may be formed of at least one of an arc shape, a square shape, and a combination of an arc shape and a square shape. Furthermore, the sealing groove is preferably made shallower than the groove.

In addition, the present invention is a body; A pair of guide cylindrical portions formed at one end of the body and rotatably seated on the pair of close contact portions according to claim 4; And a cutter portion formed between the pair of cylindrical portions to maintain a constant thickness of the epoxy bonder while scraping a portion of the epoxy bonder filled in the grooves of claim 4. do.

The cutter portion may include both edges and an inclined surface for escaping the epoxy bonder removed by the edges.

It is preferable that the spacing between the two blades is smaller than the diameter of the pair of guide cylinders.

In addition, the present invention is a liquid and gas leakage prevention method of the pipe to maintain the air tightness by applying the bonder to the weld between the pipe, filling the bonder in the grooves of the first and second coupler; Carving the bonder filled in the grooves of the first and second couplers to a curvature corresponding to the pipe; And fastening the first and second couplers to the pipe to surround the welded portion of the pipe. 2. The liquid and gas leakage preventing method of the pipe may be provided.

Furthermore, the present invention provides a liquid and gas leakage prevention method of a pipe which maintains hermeticity by applying a bonder to the weld between pipes, the method comprising: filling a bonder in a groove having a wavy bottom surface of the first and second couplers; Carving the bonder filled in the grooves of the first and second couplers to a curvature corresponding to the pipe; Temporarily fastening the first and second couplers to the pipe to surround the welded portion of the pipe; Rotating the first and second couplers by a predetermined angle; And fastening the first and second couplers. The liquid and gas leakage preventing method of the pipe may be provided.

As described above, in the present invention, by filling the bonder in each groove of the first and second coupler or by attaching to the pipe so as to surround the welded portion of the pipe with a separate sealing member inserted therein, It can effectively block the leakage of gas. In addition, since the bonder is hardened in a protected state by the first and second couplers, a part of the bonder may be removed by an operator or equipment around the binder.

Furthermore, the present invention can serve as a pipe reinforcement by using the rigidity of the first and second couplers, together with the leakage prevention of the welded portion.

In addition, the present invention is a method for preventing liquid and gas leakage of the pipe to maintain the air tightness by applying the bonder to the weld between the pipes, filling the bonder in the grooves of the first and second couplers according to claim 1; Carving the bonder filled in the grooves of the first and second couplers to a curvature corresponding to the pipe; And fastening the first and second couplers to the pipe to surround the welded portion of the pipe. 2. The liquid and gas leakage preventing method of the pipe may be provided.

In the carving step, it is preferable to uniformly set the thickness of the bonder filled in the grooves of the first and second couplers. In addition, in the carving step, it is preferable to set the thickness of the bonder filled in the grooves of the first and second couplers thicker than the depth in the grooves.

1 is an exploded perspective view showing a liquid and gas leak prevention apparatus according to an embodiment of the present invention,
2 is a combined perspective view showing a liquid and gas leak prevention apparatus according to an embodiment of the present invention,
3 is a view showing the inside of the first coupler shown in FIG.
4 is a cross-sectional view taken along line AA of FIG. 3,
FIG. 5 is a perspective view illustrating a carving member for maintaining a uniform filling thickness of a bonder filled in grooves of the first and second couplers,
FIG. 6 is an enlarged view illustrating a part of the carving member illustrated in FIG. 5.
7 is a perspective view showing another embodiment of the first coupler,
FIG. 8 is a cross-sectional view taken along line BB shown in FIG. 7;
9 is a combined perspective view showing a sealing member disposed between the first and second couplers,
FIG. 10 is an enlarged cross-sectional view illustrating a portion C shown in FIG. 9,
FIG. 11 is a cross-sectional view taken along line DD shown in FIG. 10.
12 to 15 are perspective views illustrating still another embodiment of the first coupler.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Embodiments described below are shown by way of example in order to help understanding of the invention, it should be understood that the present invention can be implemented in various modifications different from the embodiments described herein. However, in the following description of the present invention, if it is determined that the detailed description of the related known functions or components may unnecessarily obscure the gist of the present invention, the detailed description and the detailed illustration will be omitted. In addition, the accompanying drawings may be exaggerated in some of the dimensions of the components rather than being drawn to scale to facilitate understanding of the invention.

Referring to FIG. 1, the liquid and gas leak prevention apparatus according to an embodiment of the present invention may include a first coupler 10, a second coupler 20, a bonder 30, and a plurality of fasteners ( 41a-41d). In the drawings, reference numerals 26c and 26d in FIG. 1 denote coupling holes through which the fasteners 41a and 41b are coupled.

The first and second couplers 20 are coupled to the pipe 1 to surround the weld 3 of the pipe (liquid or gas pipeline) 1 as shown in FIG. 2. In this case, the first and second couplers 10 and 20 are detachably coupled to each other by a plurality of fasteners 41a to 41d.

The first coupler 10 and the second coupler 20 are formed symmetrically with each other, and only the structure of the first coupler 10 will be described below.

Referring to FIG. 3, the first coupler 10 has a predetermined length and is approximately semicircular. A groove 11 for filling the bonder 30 (for example, a viscous epoxy bonder) is formed in the center of the inner circumferential surface of the first coupler 10. The depth of the groove 11 may be formed differently according to the size or the degree of protrusion of the welded portion 3 of the pipe 1, and may be set differently according to the type of bonder to be filled.

Both sides of the groove 11 are formed in contact with the outer peripheral surface of the pipe (1). Sealing protrusions 13a and 13b are formed at ends of the contact portion, respectively. In this case, auxiliary grooves 15a and 15b having shallow depths corresponding to the thicknesses of the sealing protrusions 13a and 13b may be formed in the close contact portion. The auxiliary grooves 15a and 15b are filled in the groove 11 by the welding portion 3 which protrudes a predetermined height higher than the surface of the pipe 1 when the first coupler 10 is mounted to the pipe 1. A portion of the bonder 30 is overflowed from the groove 11, to secure a free space for accommodating such a predetermined amount of bonder (30). Accordingly, the bonder 30 may be completely filled between the surface of the pipe 1 and the first coupler 10 without any cavity.

In addition, the first coupler 10 has coupling holes 16a-16d through which the fasteners 41a-41d pass through the upper and lower sides, respectively. Referring to FIG. 4, the coupling holes 16a and 16b formed at the upper end are formed with threads that are screwed to the fasteners 41a and 41b, and the coupling holes 16c and 16d formed at the lower end are fasteners 41c and 16c. And a seating recess into which the head of 41d) is inserted. As shown in FIG. 1, the plurality of fasteners 41a to 41d fasten the first and second couplers 10 and 20 to the pipe 1 so as to be separated from each other.

On the other hand, in order to fill the groove (11) with a uniform thickness when filling the bonder 30, in the present invention may comprise a carbing member (50).

Referring to Figure 5, the carbing member 50 is formed on both sides of the cylindrical body 51 having a predetermined length carbing portion 53, 55 are formed symmetrically. In this case, at least one of the carving portions 53 and 55 may be formed. However, in the case of forming a pair of carbing parts 53 and 55 as in the present embodiment, the bonder 30 filled in the grooves 11 of the two couplers 10 and 20 is simultaneously carved to a uniform thickness. can do.

Since the carving parts 53 and 55 have the same structure, only one caring part 53 will be described below.

The carving portion 53 includes a pair of guide cylindrical portions 54a and 54b and a cutter portion 56. The pair of guide cylindrical portions 54a and 54b are disposed coaxially with the body 51 and rotated about the central axis of the carbing member 50 in a state of being seated on the first coupler 10. ) Is slidably seated in each of the pair of tight contact portions. In this case, the pair of close contact portions of the first coupler 10 are formed to have approximately the same radius as the radius of the pair of guide cylindrical portions 54a and 54b.

The cutter portion 56 is disposed between the pair of guide cylindrical portions 54a and 54b, and scrapes the bonder 30 of the groove 11 of the first coupler 10 when the carbing member 50 rotates. , So that the bonder 30 has a uniform thickness in the groove 11. In this case, the cutter portion 56 is formed to have both blades 56a and 56b, and both sides have an inclined surface 56c that the scraped bonder 30 can escape.

Referring to FIG. 6, the cutter portion 56 has a length corresponding to the outer periphery of the guide cylindrical portions 54a and 54b. Preferably, the cutter portion 56 has both edges 56a and 56b of the guide cylindrical portion. It has a length that can be located inside the predetermined interval (h) with respect to the outside of the (54a, 54b). Accordingly, the thickness of the bonder 30 filled in the groove 11 of the first coupler 10 is formed to be somewhat thicker than the thickness of the groove 11 by both edges 56a and 56b of the cutter portion 56. This takes into account the compression ratio of the bonder 30 compressed between the pipe 1 and the first coupler 10 when the first coupler 10 is mounted on the pipe 1. In addition to eliminating the cavities that may occur between the or inside the bonder 30, it is possible to maximize the airtightness of the welding portion (3).

As described above, the present invention provides a pipe (1) to surround the welded portion (3) of the pipe (1) while filling the bonder (30) in each groove (11) of the first and second couplers (10, 20). ), It is possible to effectively prevent the leakage of liquid or gas generated at the welding site.

In addition, since the bonder 30 is hardened in a protected state by the first and second couplers 10 and 20, it is possible to fundamentally prevent a problem that a portion of the bonder is removed by a worker or equipment nearby, as in the prior art. have.

In addition, the recess 11 ′ of the first coupler 10 ′ may be formed such that the bottom surface 12 ′ has a predetermined wave pattern protrusion as shown in FIGS. 7 and 8. In this case, although not shown, it is preferable to form the wavy bottom 12 'in the groove of the second coupler 20.

When the wavy bottom surface 12 'is high in viscosity and uses a low fluidity bonder 30, the bonder 30 may be completely adhered to the surface of the pipe 1 and the welded portion 3 of the pipe. Make sure That is, after filling the bonder 30 in the recesses 11 'of the first and second couplers, respectively, the temporary coupling is applied to the pipe 1 so as to surround the welding portion 3 of the pipe 1, and in this state, The fastened first and second couplers are rotated at a predetermined angle and then fully tightened. As the first and second couplers are rotated in this way, the bonder 30 is pushed in the rotational direction by the wavy bottom surface 12 ′ while the non-uniform welding part 3 and the pipes are projected or recessed. 1) Since it adheres strongly to the surface, it is possible to effectively seal the crack of the welded area (3).

Meanwhile, the present invention inserts the sealing member 70 to maintain the airtightness of the welding site by inserting the sealing member 70 instead of the bonder 30 into the groove 11 of the first and second couplers 10 and 20. Of course it is possible. Hereinafter, the structure of the sealing member 70 will be described with reference to FIGS. 9 to 11.

Referring to FIG. 9, the sealing member 70 includes a first member 71 and a second member 72 correspondingly coupled to each other. The first and second members 71 and 72 in a mutually coupled state have a substantially cylindrical shape, and each inside thereof is in close contact with the surface of the pipe 1 and the welding portion 3.

10, the first and second members 71 and 72 are formed with grooves 71a and 72a in which the welding portion 3 is in close contact with the inner central portion, and the grooves 71a and 72a are formed on both sides of the grooves 71a and 72a. A plurality of sealing protrusions 71b and 72b protrude from the circumferential direction along the inner circumferential surfaces of the first and second members 71 and 72 at predetermined intervals, respectively.

In addition, the sealing member 70 is a contact surface (71, 72) of each member (71, 72), as shown in Figure 11 so as to ensure the maximum contact area of the portion between the first and second members (71, 72) 71c and 72c are formed to be inclined, and airtightness can be improved.

In addition, the sealing member 70 may be made of any one of a material having elastic force, for example, natural rubber, synthetic rubber and synthetic resin material (Teflon ™) having a predetermined elastic force.

As described above, the present invention fills the bonder 30 in the recess 11 of the first and second couplers 10 and 20, or presses the welding part 3 while the sealing member 70 is inserted. Wrap in state. Therefore, it is possible to effectively block the leakage of the liquid or gas from the inside of the pipe through the crack generated in the welding portion (3).

Meanwhile, the first and second couplers 10 and 20 described above may be made of a metal material, or may be made of a synthetic resin material having a predetermined rigidity. Accordingly, the present invention can ensure the airtightness of the welded portion (3) of the pipe (1), and at the same time can also perform the role of the reinforcing material for the pipe.

12 to 15 show another various embodiment of the above-described first coupler 10. In such various embodiments, since both the first and second couplers are symmetric, only the first coupler will be described below.

FIG. 12 shows a first coupler 110 with a single sealing groove, and FIG. 13 is a cross-sectional view taken along line E-E shown in FIG.

Referring to FIG. 12, the first coupler 110 has a closed curve single seal in which the bonder 30 is filled to surround the groove 111 in which the welded portion 3 of the pipe 1 is inserted at a predetermined interval. Grooves 119 are formed. The sealing groove 119 is formed across the auxiliary grooves 115a and 115b on which the pipe 1 is seated so that the bonder 30 may be in close contact with the outer circumference of the pipe 1.

As such, the sealing groove 119 is disposed to surround the groove 111, thereby forming the sealing groove 119 having a predetermined width while minimizing the groove 111 into which the welding portion 3 is inserted. ), While minimizing the amount of use, it is possible to secure good sealing properties.

Referring to FIG. 13, the cross-sectional shape of the sealing groove 119 is formed in an approximately arc shape, but is not limited thereto. The cross-sectional shape may be formed in a rectangular shape having a shallow depth, in which case the amount of the bonder 30 is filled. Can be further reduced. In addition, the sealing groove 119 is preferably made of a shallower depth than the depth of the groove 111.

FIG. 14 illustrates a first coupler 210 having dual sealing grooves 218 and 219. FIG. 15 is a cross-sectional view taken along the line F-F shown in FIG.

Referring to FIG. 14, the first coupler 210 is formed with dual sealing grooves 218 and 219 which doublely surround the recesses 211 into which the welding portion 3 of the pipe 1 is inserted. In this case, an improved sealing property can be ensured as compared with the case where the single sealing groove 119 shown in FIG. 12 is provided.

The dual sealing grooves 218 and 219 overlap each other. That is, the dual sealing grooves 218 and 219 may include a sealing groove 218 surrounding the groove 211 and another sealing groove 219 surrounding the sealing groove 218 at predetermined intervals from the groove 211. In this case, the dual sealing grooves 218 and 219 are preferably formed in a closed curve shape.

In addition, the dual sealing grooves 218 and 219 are formed with first portions 218a and 219a across the auxiliary grooves 215a and 215b on which the pipes 1 rest, respectively, and extend to the first portions 218a and 219a. Second portions 218a and 219b are formed. In this case, the first portions 218a and 219a have an arc cross-sectional shape, whereas the second portions 218b and 219b formed in a portion outside the auxiliary grooves 215a and 215b have a cross-sectional shape as shown in FIG. 15. It has a rectangular shape with a thin thickness. As described above, each of the sealing grooves 218 and 219 may have various cross-sectional shapes. In addition, the sealing grooves 218 and 219 are preferably made to have a depth shallower than the depth of the groove 211.

Reference numerals 116a-116d in FIG. 12 and reference numerals 116a-116d in FIG. 14 denote coupling holes through which the fasteners 41a-41d are respectively coupled.

In the exemplary embodiment described with reference to FIGS. 12 to 15, a single sealing groove 119 and dual sealing grooves 218 and 219 are formed as an example. However, the present disclosure is not limited thereto and three or more sealing grooves may be formed according to the size of the first coupler. It can be formed, and also can be used to set the width of the sealing groove appropriately according to the number of the sealing groove.

Meanwhile, the bonders 30 may be selectively filled in the grooves 111 and 211 of the first couplers 110 and 210.

10,110,210: First Coupler 11: Groove
13a, 13b, 71b, 72b: sealing protrusion 15a, 15b: auxiliary groove
16a-16d: coupling hole 20: second coupler
30: bonder 41a-41d: fastener
50: carving member 51: body
53, 55: carving portion 56: cutter portion
56a, 56b: day 56c: slope
70: sealing member 71: first member
71a, 72a: groove 71c, 72c: contact surface
72: second member 119,218,219: sealing groove

Claims (20)

First and second couplers detachably mounted to the pipe while surrounding a welded portion of the pipe;
Sealing means positioned between the inside of the first and second couplers and the welded portion of the pipe, the sealing means being in close contact with the welded portion of the pipe in a pressed state by coupling between the first and second couplers; And
A plurality of fasteners for fastening the first and second couplers to each other;
The first and second couplers, each of which forms a groove in which the sealing means is filled or inserted along the inner peripheral surface,
The sealing means is a viscous epoxy bond,
The first and second couplers are provided with at least one of both sides of the grooves more than the depth of the grooves so as to provide a space through which some of the epoxy bonders filled in the grooves may flow in when the first and second couplers are mounted on the pipes. Liquid and gas leak prevention device, characterized in that to form a shallow auxiliary groove. delete delete First and second couplers detachably mounted to the pipe while surrounding a welded portion of the pipe;
Sealing means positioned between the inside of the first and second couplers and the welded portion of the pipe, the sealing means being in close contact with the welded portion of the pipe in a pressed state by coupling between the first and second couplers; And
A plurality of fasteners for fastening the first and second couplers to each other;
The first and second couplers, each of which forms a groove in which the sealing means is filled or inserted along the inner peripheral surface,
The sealing means is a viscous epoxy bond,
The first and second couplers are provided with semi-circular contact portions in contact with the surface of the pipe on both sides of the groove, each of the contact portion is a liquid and gas leakage preventing device, characterized in that the projecting protrusion. First and second couplers detachably mounted to the pipe while surrounding a welded portion of the pipe;
Sealing means positioned between the inside of the first and second couplers and the welded portion of the pipe, the sealing means being in close contact with the welded portion of the pipe in a pressed state by coupling between the first and second couplers; And
A plurality of fasteners for fastening the first and second couplers to each other;
The first and second couplers, each of which forms a groove in which the sealing means is filled or inserted along the inner peripheral surface,
The grooves of the first and second couplers are liquid and gas leakage preventing device, characterized in that it comprises a bottom surface is concave and convex in the shape of a wave. delete First and second couplers detachably mounted to the pipe while surrounding a welded portion of the pipe;
Sealing means positioned between the inside of the first and second couplers and the welded portion of the pipe, the sealing means being in close contact with the welded portion of the pipe in a pressed state by coupling between the first and second couplers; And
A plurality of fasteners for fastening the first and second couplers to each other;
The first and second couplers, each of which forms a groove in which the sealing means is filled or inserted along the inner peripheral surface,
The sealing means is composed of first and second members made of an elastic body,
The first and second members are formed in a cylindrical shape so as to surround the welded portions of the pipes when they are coupled to each other, and a liquid and gas leak is formed in each of the inner circumferential surfaces of the grooves through which the welded portions of the pipes are recessed. Prevention device. The method of claim 7, wherein
The first and second members are liquid and gas leakage preventing device, characterized in that at least one sealing projection formed on both sides of the groove along the inner peripheral surface. First and second couplers detachably mounted to the pipe while surrounding a welded portion of the pipe;
Sealing means positioned between the inside of the first and second couplers and the welded portion of the pipe, the sealing means being in close contact with the welded portion of the pipe in a pressed state by coupling between the first and second couplers; And
A plurality of fasteners for fastening the first and second couplers to each other;
The first and second couplers, each of which forms a groove in which the sealing means is filled or inserted along the inner peripheral surface,
The sealing means is composed of first and second members made of an elastic body,
The first and second members are formed in a cylindrical shape to surround the welded portion of the pipe when the mutual coupling, liquid and gas leakage preventing device, characterized in that the contact surface of the contact portion is inclined. The method of claim 1,
The first and second couplers may further include a sealing groove surrounding the groove, wherein the sealing groove is a liquid and gas leakage preventing device, characterized in that the sealing means is filled. The method of claim 10,
The sealing groove is made of at least two, the liquid and gas leakage preventing device, characterized in that the two or more sealing grooves are arranged overlapping. The method according to claim 10 or 11,
Cross-sectional shape of the sealing groove is a liquid and gas leakage preventing device, characterized in that made of at least one of a circular arc shape, a square shape, and a combination of the arc shape and the square shape. The method of claim 10,
The sealing groove is a liquid and gas leakage preventing device, characterized in that made of a shallower depth than the groove. Body;
A pair of guide cylinders formed at one end of the body and rotatably seated on the pair of close contact portions of claim 4; And
And a cutter portion formed between the pair of cylindrical portions to maintain a constant thickness of the epoxy bonder while scraping a portion of the epoxy bonder filled in the grooves of claim 4. 15. The method of claim 14,
And the cutter portion includes a double edge and an inclined surface for escaping the epoxy bonder removed by the double edge. 16. The method of claim 15,
Carving member, characterized in that the spacing between the two blades is formed smaller than the diameter of the pair of guide cylinder. In the liquid and gas leakage prevention method of the pipe to maintain the air tightness by applying the bonder to the weld between the pipes,
Filling the bonder into grooves of the first and second couplers according to claim 1;
Carving the bonder filled in the grooves of the first and second couplers to a curvature corresponding to the pipe; And
And fastening the first and second couplers to the pipe to surround the welded portion of the pipe. 18. The method of claim 17,
The carving step is a liquid and gas leakage prevention method of the pipe, characterized in that to uniformly set the thickness of the bonder filled in the grooves of the first and second coupler. 18. The method of claim 17,
The carving step is a liquid and gas leakage prevention method of the pipe, characterized in that for setting the thickness of the bonder filled in the grooves of the first and second coupler thicker than the depth in the grooves. In the liquid and gas leakage prevention method of the pipe to maintain the air tightness by applying the bonder to the weld between pipes,
Filling the bonder into grooves of the first and second couplers according to claim 5;
Carving the bonder filled in the grooves of the first and second couplers to a curvature corresponding to the pipe;
Temporarily fastening the first and second couplers to the pipe to surround the welded portion of the pipe;
Rotating the first and second couplers by a predetermined angle; And
And fastening the first and second couplers.

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