KR20140072571A

KR20140072571A - Apparatus for connecting pipe with increased tensile force and combination by using clamp

Info

Publication number: KR20140072571A
Application number: KR1020120140236A
Authority: KR
Inventors: 고경화
Original assignee: 고경화
Priority date: 2012-12-05
Filing date: 2012-12-05
Publication date: 2014-06-13

Abstract

[0001] The present invention relates to a pipe connecting apparatus which can be easily increased in tensile force and fastened using a clamp, and more particularly to a pipe connecting apparatus having a pipe formed in a hollow shape and having an engagement groove formed on an outer periphery of an end thereof; A pipe inlet formed in a hollow shape and having a protruding jaw protruding from a central portion of an inner side of the pipe, the pipe inlet being expanded at both ends with respect to the catching jaw, the pipe being expanded at an end of the pipe inlet, A coupling tube having a locking protrusion having an O-ring fixing groove on an inner surface thereof; An O-ring inserted and fixed in the O-ring fixing groove of the coupling pipe to maintain watertightness; A first hinge protruding from one end of each of the main bodies and coupled to each other by a first hinge axis, and a second hinge protruding from the other end of the main body, A second hinge having a first hinge axis and a second hinge axis and a bolt plate protruding from the other end of the other main body at a position corresponding to the second hinge and being axially coupled to a second hinge axis of the second hinge, A fixing bolt formed vertically so as to be engaged with a latching groove of the pipe around an inner end of one end of the main body and a latching protrusion of the connection pipe is expanded at the other end of the main body so as to be inserted, Wherein the coupling protrusions are formed on the outer circumferential surface of the coupling pipe, And compressing the o-ring group, is coupled to the engaging groove of the pipe is characterized in that it comprises a clamp for securing the pipe.
According to the present invention configured as described above, the fixing groove is formed in the pipe, and the O-ring groove is compressed by using a clamp to form an O-ring groove in which both ends of the O- The pipe can be prevented from being separated from the pipe and the tensile force of the pipe can be increased and the pipe can be tightened with the bolt to tighten the pipe, And one end of the clamp is formed by the hinge method and the other end is formed by the bolt fastening method so that the clamp can be easily fastened to the connection pipe and the assembling is facilitated and the working time can be shortened in the actual work site.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pipe connecting apparatus for a pipe connecting apparatus,

[0001] The present invention relates to a pipe connecting apparatus which can be easily expanded and clamped using a clamp. More specifically, the present invention relates to a pipe connecting apparatus in which a fixing groove is formed in a pipe and an O- The O-ring groove and the O-ring groove are squeezed to press the O-ring and the pipe, and the pipe is fastened and fixed to the clamp so that when the external force is generated, the pipe is prevented from coming off and the tensile force of the pipe is increased. To a pipe connecting apparatus which is easy to increase tensile force and fasten.

Generally, the pipe connecting device is mainly used as a means for fixing a pipe to a pipe while maintaining the airtightness of the pipe, and has various shapes such as a straight line, an elbow type, a T-shaped line, and a cross line depending on its structural form .

Conventional pipe connecting apparatuses require a separate fixing means such as a screw connection or a snap ring to weld the connection portion of the pipe in order to improve the airtightness and the coupling property. Therefore, the piping connection operation is difficult and the assembling process is increased, have.

In addition, since the conventional stainless steel pipe for general piping used in such a conventional pipe connecting apparatus is thin, it is difficult to form a screw as well as welding at a construction site, and a separate process such as use of a dedicated compactor or expansion is added There is an inconvenience that should be ...

Various pipe connection devices have been developed to solve these problems, and a pipe connection device using a clamp (coupler) has been developed.

Japanese Patent Laid-Open Nos. 2003-0009650 and 10-2007-0103808 are disclosed in connection with a pipe connecting apparatus using the clamp.

As shown in FIG. 1 and FIG. 2, a coupling ball joint, which is disclosed in Korean Patent Laid-Open Publication No. 2003-0009650, includes a sealing member 120 that surrounds two connecting pipes 110 connected to a pipe 200, The sealing member 120 coupled with the tube 110 is tightened and supported by the band body 140 again to seal the tube. The connection pipe 110 connected to the pipe has a convex spherical surface 111 to correspond to a change in connection angle while maintaining a state of being in tight contact with the sealing member 120. The convex spherical surface 111 has the same center and radius as the concave spherical surface inside the sealing member 120, so that even if the connecting tube 110 changes its angle in any direction, it maintains a constant close contact surface. The coupling tube 110 forms a space for a change in angle when the coupling tube 110 is engaged with the sealing member 120. The coupling tube 110 includes a guide member 130 for receiving the fluid pressure acting on the coupling tube 110 Is fitted into the tip end 112 of the coupling tube 110. [ The guide member 130 has a contact surface and functions to prevent the guide members 130 from being closely contacted with each other in the hollow 121 of the sealing member 120. Also, as shown in the drawing, the coupling pipe 110 coupled to the guide member 130 is coupled through the sealing member 120, and the sealing member 120 is tightened and supported by the band body again. The band body may be formed in the form of a single ring or a combination of one or more semicircular band bodies. In this figure, the semicircular band body 140 corresponds to the opposite direction. The semicircular band member 140 includes a fastening part 144 including a fastening hole 141 as shown in the drawing when the fastening part 144 is formed with a plate material, Is coupled with the body (140) in the form of welding or the like. A fastening hole 141 is formed in the upper surface and a lower surface of the fastening portion 144. A fastening hole 147 is formed in the pin hole 146 to support the fastening hole. Shaped fixing pin 143 is inserted. Further, the band member has the side surface portion 145 so as to surround and support the sealing member on three sides.

3, the joint cover for pipe connection, which is disclosed in Korean Patent Laid-Open Publication No. 10-2007-0103808, includes a bolt insertion portion 220 for coupling the joint cover 210 and the joint cover 210, A sensor connection unit 240 for connecting the unit 230 to the leakage sensor, and a rib 250 for preventing water leakage or pipe separation. In FIG. 3, reference numeral 200 is a pipe, 221 is a bolt, and 231 is a nut.

However, since the coupling ball joint has a complicated configuration due to a large number of components, the manufacturing time and cost are increased, the number of components is large and assembly is difficult, and the pipe must be expanded in the field. .

In addition, the joint cover for pipe connection has a simple structure, but since the cover simply press-fitting the pipe, there is no separate connection structure between the pipe and the cover, so that it is easily detached by an external impact and the airtightness is relatively lowered.

Korean Patent Publication No. 2003-0009650 Korean Patent Publication No. 10-2007-0103808

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pipe having a fixing groove and an O-ring groove in which both ends of the pipe are inserted, When an external force is generated in the pipe by clamping and fixing the pipe to the clamp, it is possible to prevent the pipe from escaping and increase the tensile force of the pipe. The pipe and the pipe are tightly sealed And to provide a pipe connecting device that can be easily increased in tensile force and fastened by using a clamp that can relatively increase airtightness.

In addition, according to the present invention, since one end of the clamp is formed by a hinge method and the other end is formed by a bolt fastening method, the clamp can be easily fastened to the connection pipe, thereby facilitating assembly, The present invention has another object to provide a pipe connecting device which is easy to increase and fasten a tensile force.

Another object of the present invention is to provide a pipe connection device which can be easily increased in tensile force and fastened by using a clamp which can relatively reduce manufacturing time and cost because the number of components is small.

According to an aspect of the present invention,

A pipe formed in a hollow shape and having an engagement groove formed on the outer periphery of the end; A pipe inlet formed in a hollow shape and having a protruding jaw protruding from a central portion of an inner side of the pipe, the pipe inlet being expanded at both ends with respect to the catching jaw, the pipe being expanded at an end of the pipe inlet, A coupling tube having a locking protrusion having an O-ring fixing groove on an inner surface thereof; An O-ring inserted and fixed in the O-ring fixing groove of the coupling pipe to maintain watertightness; A first hinge protruding from one end of each of the main bodies and coupled to each other by a first hinge axis, and a second hinge protruding from the other end of the main body, A second hinge having a first hinge axis and a second hinge axis and a bolt plate protruding from the other end of the other main body at a position corresponding to the second hinge and being axially coupled to a second hinge axis of the second hinge, A fixing bolt formed vertically so as to be engaged with a latching groove of the pipe around an inner end of one end of the main body and a latching protrusion of the connection pipe is expanded at the other end of the main body so as to be inserted, Wherein the coupling protrusions are formed on the outer circumferential surface of the coupling pipe, And compressing the o-ring group, is coupled to the engaging groove of the pipe is characterized in that it comprises a clamp for securing the pipe.

Here, the inner diameter of the clamp is formed to be shorter than the outer diameter of the connection pipe so as to generate a pressure input when the connection pipe is fastened to the connection pipe.

Here, a U-shaped groove is formed in the bolt plate so that the fixing bolt is rotated and inserted.

Here, the bolt hole of any one of the bolt plates is formed in a "U" shape so as to secure a space for fastening the bolt in a state where the clamp is fastened to the coupling tube and opened around the hinge axis .

Here, the catching groove of the pipe is formed so that its width is larger than the thickness of the clamping jaw of the clamp so as to correspond to an external impact or an uneven settlement, thereby providing a gap g in which the pipe can be moved to the right and left .

According to another aspect of the present invention,

A pipe formed in a hollow shape and having an engagement groove formed on the outer periphery of the end; A pipe inlet formed in a hollow shape and having a protruding jaw protruding from a central portion of an inner side of the pipe, the pipe inlet being expanded at both ends with respect to the catching jaw, the pipe being expanded at an end of the pipe inlet, A coupling tube having a locking protrusion having an O-ring fixing groove on an inner surface thereof; An O-ring inserted and fixed in the O-ring fixing groove of the coupling pipe to maintain watertightness; A hinge jaw protruding from one end of each of the main bodies and coupled to each other by a hinge shaft; and a protrusion formed at the other end of each of the main bodies and having a bolt hole A fixing jaw formed vertically so as to be engaged with an engagement groove of the pipe at an inner periphery of one end of the main body, and a locking jaw extending from the other end of the main body so as to insert the coupling jaw of the coupling tube, And a locking jaw receiving groove corresponding to the receiving jaw of the pipe is formed. The o-ring is coupled to the pipe at the outer side of the jaw to press the jaw to press the o-ring, And a clamp for applying a clamping force.

According to the pipe connecting apparatus of the present invention having the above-described construction, the clamping groove is formed in the pipe, and in the state where the O-ring groove for inserting the O-ring is formed at both ends of the pipe, The O-ring groove and the O-ring groove are squeezed to press the O-ring and the pipe, and the pipe is fastened and fixed to the clamp so that an external force is generated to move the pipe, thereby preventing the pipe from coming off and increasing the tensile force of the pipe. And the airtightness can be relatively increased by sealing the pipe and the connection pipe.

Further, according to the present invention, one end of the clamp is formed by the hinge method and the other end is formed by the bolt fastening method, so that the clamp can be easily fastened to the connection pipe, thereby facilitating assembly and shortening the working time at the actual work site.

Further, according to the present invention, since the number of components is small, the production time and the unit cost can be relatively lowered.

1 to 3 are views showing the construction of a conventional pipe connecting apparatus.
4 is a perspective view showing the construction of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to the first embodiment of the present invention.
FIG. 5 is an exploded perspective view showing a structure of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to a first embodiment of the present invention.
FIG. 6 is a cross-sectional view showing the structure of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to the first embodiment of the present invention.
FIG. 7 and FIG. 8 are perspective views showing the structure of a clamp among pipe connecting apparatuses that can be easily increased in tensile force and fastened using a clamp according to the first embodiment of the present invention.
FIG. 9 is a perspective view showing the construction of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to a second embodiment of the present invention.
10 is an exploded perspective view showing a structure of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to a second embodiment of the present invention.
11 is a cross-sectional view showing the structure of a pipe connecting apparatus which can be easily increased in tensile force and fastened using a clamp according to a second embodiment of the present invention.
12 and 13 are perspective views showing the structure of a clamp among the pipe connecting apparatuses which can be easily increased in tensile force and fastened using a clamp according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

&Quot; First Embodiment &

FIG. 4 is a perspective view illustrating a structure of a pipe connecting apparatus that can be easily increased in tensile force and fastened using a clamp according to a first embodiment of the present invention. FIG. 5 is a perspective view of a pipe connecting apparatus according to the first embodiment of the present invention, FIG. 6 is a cross-sectional view illustrating a structure of a pipe connecting device that can be easily increased in tensile force and fastened using a clamp according to a first embodiment of the present invention, and FIG. FIG. 7 and FIG. 8 are perspective views showing the structure of a clamp among pipe connecting apparatuses that can be easily increased in tensile force and fastened using a clamp according to the first embodiment of the present invention.

4 to 8, a pipe connecting apparatus 1 which is easy to increase tension and fasten using a clamp according to the first embodiment of the present invention comprises a pipe 10, a connecting pipe 20, (30), and a clamp (40).

First, the pipe 10 is made of metal or synthetic resin in a hollow shape, and a square-shaped latching groove 11 is formed around the outer periphery of one end. The width of the engaging groove 11 of the pipe 10 is formed to be wider than the thickness of the fixing jaw 46 of the clamp 40 to be described later so that the gap 10 g) so as to be able to cope with an external impact or an uneven settlement.

The connection pipe 20 is made of a metal or a synthetic resin and is formed in hollow, L-shaped, T-shaped, or the like. The coupling protrusion 21 protrudes from the center of the inner side, And a locking jaw 25 having an end bent inward and having an O-ring fixing groove 25a formed on an inner side of the pipe inlet 23 is formed at the end of the pipe inlet 23, .

The O-ring 30 is formed of a synthetic resin or a rubber material and is inserted into the O-ring groove 25a of the coupling pipe 20 so as to maintain watertightness.

The clamp 40 includes a main body 41, a first hinge 42, a second hinge 43, a bolt plate 44, a fixing bolt 45, a fixing jaw 46, And a press-in jaw 47.

The main body 41 is made of metal (stainless steel) or synthetic resin and is formed into a semicylindrical shape, and is provided with a pair. Here, the main body 41 is preferably formed so that the inner diameter of the main body 41 is shorter than the outer diameter of the connection pipe 20 so as to generate a pressure input when the connection pipe 20 is fastened.

The first hinge 42 protrudes from one end of each body 41 and is coupled to each other by a first hinge shaft 42a.

The second hinge 43 protrudes from the other end of one of the main bodies and is provided with a second hinge shaft 43a.

The bolt plate 44 is protruded from the other end of the other body at a position corresponding to the second hinge 43. Here, the bolt plate 43 is provided with a space in which the clamp 40 is fastened to the coupling pipe 20 and fastened with the fixing bolt 45, which will be described later, with the first hinge 42 being opened around the center It is preferable that a groove 44a of a "U "

The fixing bolt 45 is axially coupled to the second hinge shaft 43a of the second hinge 43 and is engaged with the bolt plate 44.

The fixing jaw 46 is integrally formed to be vertically protruded to be engaged with the engagement groove 11 of the pipe 10 around the inner end of the one end of the main body 41.

The press-in jaw 47 protrudes from the other end of the main body 41 in such a manner that the engaging protrusion 25 of the connection pipe 20 is inserted. The engaging protrusion 25 of the connection pipe 20 The corresponding latching jaw receiving groove 47a is formed.

Hereinafter, an assembling process of a pipe connecting apparatus, which is easy to increase tensile force and fasten using a clamp according to a first embodiment of the present invention, will be described in detail with reference to the accompanying drawings.

First, the O-rings 30 are inserted into the O-ring fixing grooves 25a provided in the latching jaws 25 of the coupling tube 20, respectively.

In this state, the side of the connecting pipe 20 on which the holding groove 11 of the pipe 10 is formed is inserted into the pipe inlet 23. At this time, the pipe 10 passes through the O-ring 30.

Then, the pipe 10 is inserted along the pipe inlet 23 and fixed to the hooking jaw 21 of the connecting pipe 20.

In this state, a force is externally applied to the clamp 40 to open the hinge shaft 42 about the center, and then the main body 41 is coupled to the outside of the connecting pipe 20. At this time, the fixing jaw 46 of the clamp 40 is inserted into the engaging groove 11 of the pipe 10 and the engaging jaw receiving groove 47a formed in the press- (25) is inserted and held in a fixed state.

Thereafter, a force is applied to the clamp 40, and then the fixing bolt 45 is rotated to insert it into the U-shaped groove 44a of the bolt plate 44 and then tighten the nut 50 Clamps 40 are fastened to each other.

The O-ring 30 fixed to the O-ring fixing groove 25a of the engaging jaw 25 is inserted into the O-ring fixing groove 25a of the coupling tube 20 as the clamping jaw 25 of the coupling tube 20 is inserted as the clamp 40 is tightened through the nut 50 And is brought into close contact with the pipe 10. Since the inner diameter of the main body 41 is smaller than the outer diameter of the connection pipe 20 so that the main body 41 generates a pressure input when the connection pipe 20 is fastened to the main body 41, ).

Since the engaging groove 11 of the pipe 10 and the fixing jaw 46 of the clamp 40 are engaged with each other, they are not separated from each other due to external impact or pressure. Particularly, 40 can be made wider than the thickness of the fixing jaw 46 of the pipe 40 so as to provide a gap g in which the pipe 10 can be moved laterally.

&Quot; Second Embodiment &

FIG. 9 is a perspective view showing the construction of a pipe connecting apparatus which can be easily increased in tensile force and fastened by using a clamp according to a second embodiment of the present invention, and FIG. 10 is a perspective view showing a clamping apparatus according to a second embodiment of the present invention, FIG. 11 is an exploded perspective view showing a structure of a pipe connecting apparatus which is easy to increase and fasten. FIG. 11 is a sectional view showing the construction of a pipe connecting apparatus which can be easily increased in tensile force and fastened using a clamp according to a second embodiment of the present invention, 12 and 13 are perspective views showing the configuration of a second embodiment of a clamp among pipe connecting apparatuses that can be easily increased in tensile force and fastened using a clamp according to a second embodiment of the present invention.

9 to 13, a pipe connecting apparatus 1 which is easy to increase tensile force and fasten using a clamp according to a second embodiment of the present invention comprises a pipe 10, a connecting pipe 20, (30), and a clamp (40 ').

First, the pipe 10 is made of metal or synthetic resin in a hollow shape, and a square-shaped latching groove 11 is formed around the outer periphery of one end. Here, the width of the engagement groove 11 of the pipe 10 is formed to be wider than the thickness of the fixing jaw 47 'of the clamp 40' to be described later, so that the pipe 10 can be moved left and right It is preferable to provide the gap g so as to be able to cope with an external impact or an uneven settlement.

The clamp 40 'is composed of a main body 41', a hinge jaw 43 ', a bolt plate 45', a fixing jaw 47 'and a press-in jaw 49'.

The body 41 'is made of metal (stainless steel) or synthetic resin and is formed into a semi-cylindrical shape, and is provided with a pair. Here, the main body 41 'is preferably formed so that the inner diameter of the main body 41' is shorter than the outer diameter of the coupling pipe 20 'so as to generate a pressure input when the coupling pipe 20' is fastened.

The hinge jaws 43 'are protruded from one end of each body 41' and are coupled to each other by a hinge shaft 42 '.

The bolt plate 45 'is protruded at the other end of each body 41' and has a bolt hole 46 '. Here, the bolt hole of any one of the bolt plates 45 'is engaged with the nut 50 and the nut 50' in a state where the clamp 40 'is fastened to the connecting pipe 20 and opened around the hinge shaft 42' It is preferable to be formed in a "U" shape so as to secure a space for fastening the bolt 60. At this time, it is preferable that a hexagonal wrench bolt is used for the bolt 60.

The fixing jaw 47 'is formed integrally with the fixing groove 47 of the pipe 10 so as to be vertically protruded around the inner circumference of the one end of the main body 41.

The press-in jaw 49 'is protruded from the other end of the main body 41' so as to insert the engaging jaw 25 of the connecting tube 20, and the engaging jaw 25 Is formed on the bottom surface of the holding groove 49a '.

Hereinafter, an assembling process of a pipe connecting apparatus, which is easy to increase tensile force and fastening using a clamp according to the present invention, will be described in detail with reference to the accompanying drawings.

In this state, a force is externally applied to the clamp 40 'to open the hinge shaft 42 about the center, and then the main body 41' is coupled to the outside of the connecting pipe 20. At this time, the fixing jaw 47 'of the clamp 40' is inserted into the coupling groove 11 of the pipe 10 and the coupling tube 20 'is inserted into the coupling jaw receiving groove 47a' formed in the press- Is inserted and held in a fixed state.

Then, a force is applied to the clamp 40 ', and then the bolt 60 and the nut 50 are fastened to the bolt plate 45' to fasten the clamp 40 '. At this time, since the bolt hole 46 'of the bolt plate 35 is formed in the "U" shape, the bolt 60 can be fastened in a straight line.

The O-ring 30 fixed to the O-ring fixing groove 25a of the engaging jaw 25 is inserted into the O-ring fixing groove 25a of the coupling tube 20 as the clamping jaw 25 of the coupling tube 20 is inserted as the clamp 40 is tightened through the bolt 60. [ And is brought into close contact with the pipe 10. Since the inner diameter of the main body 41 'is smaller than the outer diameter of the connection pipe 20 so that the main body 41' can generate a pressure input when the connection pipe 20 is fastened to the connection pipe 20, (25).

Since the engaging groove 11 of the pipe 10 and the fixing jaw 47 'of the clamp 40' are engaged with each other, they are not separated from each other due to external impact or pressure, Is formed to be wider than the thickness of the fixing jaw 47 'of the clamp 40' so as to provide a gap g in which the pipe 10 can be moved to the left and right, have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

10: pipe 20: connector
30: O-ring 40, 40 ': Clamp
50: Nut 60: Bolt

Claims

A pipe formed in a hollow shape and having an engagement groove formed on the outer periphery of the end;
A pipe inlet formed in a hollow shape and having a protruding jaw protruding from a central portion of an inner side of the pipe, the pipe inlet being expanded at both ends with respect to the catching jaw, the pipe being expanded at an end of the pipe inlet, A coupling tube having a locking protrusion having an O-ring fixing groove on an inner surface thereof;
An O-ring inserted and fixed in the O-ring fixing groove of the coupling pipe to maintain watertightness;
A hinge jaw protruding from one end of each of the main bodies and coupled to each other by a hinge shaft; and a protrusion formed at the other end of each of the main bodies and having a bolt hole A fixing jaw formed vertically so as to be engaged with an engagement groove of the pipe at an inner periphery of one end of the main body, and a locking jaw extending from the other end of the main body so as to insert the coupling jaw of the coupling tube, And a locking jaw receiving groove corresponding to the receiving jaw of the pipe is formed. The o-ring is coupled to the pipe at the outer side of the jaw to press the jaw to press the o-ring, Wherein the clamping device comprises a clamp for clamping the pipe.

A pipe formed in a hollow shape and having an engagement groove formed on the outer periphery of the end;
A pipe inlet formed in a hollow shape and having a protruding jaw protruding from a central portion of an inner side of the pipe, the pipe inlet being expanded at both ends with respect to the catching jaw, the pipe being expanded at an end of the pipe inlet, A coupling tube having a locking protrusion having an O-ring fixing groove on an inner surface thereof;
An O-ring inserted and fixed in the O-ring fixing groove of the coupling pipe to maintain watertightness;
A first hinge protruding from one end of each of the main bodies and coupled to each other by a first hinge axis, and a second hinge protruding from the other end of the main body, A second hinge having a first hinge axis and a second hinge axis and a bolt plate protruding from the other end of the other main body at a position corresponding to the second hinge and being axially coupled to a second hinge axis of the second hinge, A fixing bolt formed vertically so as to be engaged with a latching groove of the pipe around an inner end of one end of the main body and a latching protrusion of the connection pipe is expanded at the other end of the main body so as to be inserted, Wherein the coupling protrusions are formed on the outer circumferential surface of the coupling pipe, And compressing the o-ring group, it is coupled to the engaging groove of the pipe a pipe connecting device which is easy to increase tension and fastening using a clamp comprising a clamp for securing the pipe.

3. The method according to claim 1 or 2,
The clamp
Wherein the inner diameter of the connecting pipe is shorter than the outer diameter of the connecting pipe so as to generate a pressure input when the connecting pipe is fastened.

The method according to claim 1,
The bolt hole of any one of the bolt plates has a bolt hole,
U "shape so as to secure a space in which the bolt can be fastened in a state where the clamp is fastened to the coupling tube and opened around the hinge shaft. [5] The clamp according to claim 1, Pipe connection.

3. The method of claim 2,
In the bolt plate,
Wherein a U-shaped groove is formed in such a way that the fixing bolt is pivoted and inserted, thereby facilitating the expansion and fastening of the pipe using the clamp.

3. The method according to claim 1 or 2,
Wherein the pipe-
The width of which is larger than the thickness of the fixing jaw of the clamp so as to correspond to an external impact or an uneven settlement so as to provide a gap g in which the pipe can be moved laterally, And a pipe connection device which is easy to be fastened.