KR20120119653A - Pipe connecting device, piping having the same, repair method and construction method for piping using the same - Google Patents

Abstract

PURPOSE: A pipe connection device, a pipeline having the same, and pipeline repair and construction methods using the same are provided to prevent the leak of fluid by using first and second sealing portions. CONSTITUTION: A pipe connection device(20) comprises first and second connection members(21, 26), first and second flanges(32, 35), plural fixing bolts(38), and plural nuts(39). The first and the second connection members are connected to the end portions of the first and second synthetic resin pipes(12, 14) respectively. The first and the second flanges comprise a first and second through holes(33, 36) and first and second combining holes(34, 37). The fixing bolts are combined with the second combining holes. The nuts are thread combined to the end portion of the fixing bolts passing through the second combining holes.

Description

Pipe connecting device, piping having the same, repair method and construction method for piping using the same}

The present invention relates to a pipe connecting device, and more particularly, to a pipe connecting device for connecting a pipe constituting a pipe for guiding the flow of fluid, a pipe having the same, and a repairing method and a construction method using the same. .

In general, the pipe is used as a water supply line or an oil supply line to the industrial facilities of homes and various industrial sites. These pipes consist of a number of pipes connecting the supply points to the supply points of the fluid. Representative pipes include metal pipes, concrete pipes, and synthetic pipes.

The plurality of pipes forming the tubing are continuously connected via pipe connecting means. Between the pipe and the pipe, various valves are installed to control the flow of the fluid. While laying pipes of a certain length sequentially at the actual plumbing site, each pipe is connected by a pipe connecting means to complete a continuous pipe as a whole.

Typically, pipes are buried underground to some depth from the ground to reduce the risk of breakage and to secure ground space. The construction of the pipe consists of digging the ground first, securing sufficient space, connecting the pipes sequentially, and then burying them in the soil. In the case of urban areas, it is possible to minimize the risk of pipe breakage due to ground subsidence and collapse by increasing the density of soils by digging the soil around which the pipes are buried.

Underground pipes are very difficult to repair or replace. For example, when a problem occurs in a pipe constituting a pipe, it is time-consuming and expensive to replace a problematic pipe. Moreover, old or broken pipes are difficult to recycle, which makes it difficult to process replaced pipes.

In addition, the conventional pipe is used to seal the pipe connection by using a flexible sealing member such as rubber or silicone in the pipe connection, the sealing performance of the pipe connection is reduced in the long-term use increases the risk of fluid leakage. Furthermore, when replacing some of the pipes that make up the piping, sealing the connection of the newly replacing pipe is very expensive and expensive.

The present invention has been made in view of this point, an object of the present invention is to provide a pipe connecting device and a pipe repairing method using the same, which is easy to repair the existing pipe and excellent sealing performance for the pipe connection.

Another object of the present invention is to provide a pipe connecting device and a method of constructing a pipe using the same, so that the sealing effect is not lowered even if used for a long time by firmly connecting the pipe, thereby increasing the stability and reliability.

Pipe connecting apparatus according to the present invention for achieving the above object, the first connecting member connected to the end of the first synthetic resin pipe, the second connecting member connected to the end of the second synthetic resin pipe, the first through hole and the first A first flange having a plurality of first engaging holes arranged around a through hole, a second flange having a second through hole and a plurality of second engaging holes arranged around the second through hole, and of the first flange. A plurality of fixing bolts coupled to the plurality of second coupling holes of the second flange through a plurality of first coupling holes, and screwed to the ends of the plurality of fixing bolts passing through the plurality of second coupling holes of the second flange; It comprises a plurality of nuts. The first connection member may include a first pipe connection part having a shape corresponding to the first synthetic resin pipe, a first head part provided at one end of the first pipe connection part to have a diameter larger than the diameter of the first pipe connection part; A first connection hole formed through the first pipe connection part and the first head part, and a sealing part protruding to surround the first connection hole on a front surface of the first head part; A second pipe connecting portion having a shape corresponding to the second synthetic resin pipe, a second head portion provided at one end of the second pipe connecting portion to have a diameter larger than the diameter of the second pipe connecting portion, the second pipe connecting portion and the second The second connecting hole formed through the head portion, the sealing portion may be inserted around the second connecting hole in the front of the second head portion Has an insertion groove is provided.

Protruding height of the sealing portion is preferably greater than the depth of the insertion groove.

The sealing part may have a plurality of concentric circles around the first connection hole, and the insertion groove may have a plurality of concentric circles around the second connection hole.

The sealing portion may be formed in a tapered shape that gradually decreases in width, and the insertion groove may be formed in a tapered shape corresponding to the sealing part.

The first pipe connection part and the second pipe connection part may be fused to the first synthetic resin pipe and the second synthetic resin pipe, respectively.

The first flange and the second flange may be made of metal.

Piping according to the present invention for achieving the above object, a plurality of first synthetic resin pipes, a plurality of second synthetic resin pipes arranged to be adjacent to the plurality of first synthetic resin pipes, the first synthetic resin pipes and the second synthetic resin pipes A plurality of pipe connecting devices arranged between the first synthetic resin pipe and the second synthetic resin pipe, wherein the pipe connecting device comprises: a first connecting member and a second synthetic resin connected to an end of the first synthetic resin pipe; Disposed around the first flange, the second through hole and the second through hole having a second connecting member connected to the end of the pipe, a first through hole and a plurality of first engaging holes arranged around the first through hole; A second flange having a plurality of second coupling holes, the plurality of first coupling holes of the first flange A plurality of fixing bolts coupled to the second coupling holes of the number, A plurality of nuts screwed to the ends of the plurality of fixing bolts passed through the plurality of second coupling holes of the second flange. The first connection member may include a first pipe connection part having a shape corresponding to the first synthetic resin pipe, a first head part provided at one end of the first pipe connection part to have a diameter larger than the diameter of the first pipe connection part; A first connection hole formed through the first pipe connection part and the first head part, and a sealing part protruding to surround the first connection hole on a front surface of the first head part; A second pipe connecting portion having a shape corresponding to the second synthetic resin pipe, a second head portion provided at one end of the second pipe connecting portion to have a diameter larger than the diameter of the second pipe connecting portion, the second pipe connecting portion and the second The second connecting hole formed through the head portion, the sealing portion may be inserted around the second connecting hole in the front of the second head portion Has an insertion groove is provided.

The maintenance method of the pipe according to the present invention for achieving the above object, (a) exposing the pipe buried underground to the outside, (b) partially cutting the buried pipe constituting the pipe, (c) Coupling a first flange having a plurality of first coupling holes to either one of two cutouts of the buried pipes formed to face each other; (d) a cut to one cutout of the buried pipe to which the first flange is coupled; 1 inserting a synthetic resin pipe, (e) a first head connecting portion, a first head portion provided to have a diameter larger than a diameter of the first pipe connecting portion at one end of the first pipe connecting portion, the first pipe connecting portion and the A first connection member having a first connection hole formed through the first head portion and a sealing portion protruding to surround the first connection hole on the front surface of the first head portion; Preparing and connecting the first pipe connection part to the end of the first synthetic resin pipe; (f) joining a second flange having a plurality of second coupling holes to the other of two cut parts of the buried pipe; (g) inserting a second synthetic resin pipe into the cutout of the buried pipe to which the second flange is coupled; (h) a second pipe connection, one end of the second pipe connection than the diameter of the second pipe connection; A second connection part formed to have a large diameter, a second connection hole formed through the second pipe connection part and the second head part, and an insertion groove provided to surround the second connection hole in the front of the second head part. Preparing a second connecting member having a, and connecting the second pipe connecting portion to the end of the second synthetic resin pipe, (i) the sealing portion is inserted into the insertion groove Contacting the first connecting member and the second connecting member so as to contact each other; (j) a plurality of fixing bolts are connected to the plurality of second coupling holes of the second flange through the plurality of first coupling holes of the first flange. Inserting and screwing a plurality of nuts to the ends of the plurality of fixing bolts passing through the plurality of second coupling holes to tighten the first flange and the second flange.

In the repairing method of the pipe according to the present invention, after the step (d), supplying hot air to the first synthetic resin pipe to expand the first synthetic resin pipe, and after the (g) step, the hot air to the second synthetic resin pipe The supply may further comprise the step of straightening the second synthetic resin pipe.

When the first flange, the second flange and the buried pipe are made of metal, the step (c) includes welding the first flange to the buried pipe, and the step (f) comprises the second And welding a flange to the buried pipe.

When the first connection member and the second connection member are made of synthetic resin, the step (e) includes fusing the first pipe connection portion to the end of the first synthetic resin pipe, and the step (h) And fusion bonding the second pipe connection to an end of the second synthetic resin pipe.

The construction method of the pipe according to the present invention for achieving the above object, (a) the first head portion is provided with a diameter larger than the diameter of the first pipe connection portion at one end of the first pipe connection portion, the first pipe connection portion. And a first connection member having a first connection hole formed through the first pipe connection portion and the first head portion, and a sealing portion protruding to surround the first connection hole on the front surface of the first head portion. Connecting the first pipe connecting portion to an end of the first synthetic resin pipe, (b) a first through hole through which the first synthetic resin pipe and the first pipe connecting portion pass, and disposed around the first through hole Preparing a first flange having a plurality of first coupling holes, and forming the first flange such that one surface thereof is in contact with a rear surface of the first head; Or coupling to the first pipe connection part, (c) a second pipe connection part, a second head part provided at one end of the second pipe connection part to have a diameter larger than the diameter of the second pipe connection part, the second pipe part; Preparing a second connecting member having a second connecting hole formed through the connecting portion and the second head portion, an insertion groove provided to surround the second connecting hole in the front of the second head portion, and the second pipe connecting portion Connecting to an end of the second synthetic resin pipe, (d) a second through hole through which the second synthetic resin pipe and the second pipe connection portion can pass, and a plurality of second coupling holes disposed around the second through hole; Preparing a second flange having a second flange so that one side of the second flange is in contact with the rear of the second head portion or the second wave pipe Coupling to the coupling part, (e) contacting the first connection member and the second connection member such that the sealing part is inserted into the insertion groove, and (f) a plurality of fixing bolts are connected to the plurality of first flanges. A plurality of nuts are inserted into the plurality of second coupling holes of the second flange through a first coupling hole, and the plurality of nuts are screwed to the ends of the plurality of fixing bolts that have passed through the plurality of second coupling holes, respectively; Tightening the second flange.

When the first connection member and the second connection member are made of synthetic resin, the step (a) includes fusing the first pipe connection portion to the end of the first synthetic resin pipe, and the step (c) And fusion bonding the second pipe connection to an end of the second synthetic resin pipe.

The pipe connecting device according to the present invention is crimped by a first flange and a second flange, in which a first connecting member and a second connecting member coupled to ends of two synthetic resin pipes adjacent to each other are joined by a plurality of fixing bolts and nuts. Thus, two plastic pipes can be firmly connected.

In addition, the pipe connecting device according to the present invention has a sealing structure that is integrally provided in the first connecting member made of a rigid material such as synthetic resin is pressed into the insertion groove of the second connecting member to prevent the leakage of fluid, pipe connection The sealing efficiency does not decrease even if it is used for a long time compared to the conventional sealing with a sealing member of a heterogeneous material such as rubber or silicone.

In addition, the repairing method of the pipe according to the present invention inserts a new resin pipe inside the existing buried pipe to allow the fluid to flow into the plastic pipe, and the existing buried pipe wraps the plastic pipe to serve to protect the plastic pipe. Piping can be repaired without the need for replacement, and there is no need to dispose of the existing buried pipe, saving costs and time.

1 is an exploded perspective view showing a main part of a pipe according to an embodiment of the present invention.
2 is a cross-sectional view showing the main part of the pipe according to an embodiment of the present invention.
3A to 3F show a method for repairing a pipe using a pipe connecting device according to the present invention.
4 is for explaining a repair method of the pipe according to another embodiment of the present invention.
5a to 5c show the construction method of the pipe using the pipe connecting apparatus according to the present invention.
6 and 7 show a pipe connecting apparatus according to another embodiment of the present invention, respectively.

Hereinafter, with reference to the accompanying drawings, a pipe connecting apparatus according to the present invention, a pipe having the same and a repair method and construction method of the pipe using the same will be described in detail.

In describing the present invention, the sizes and shapes of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

1 is an exploded perspective view showing a main part of a pipe according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a main part of a pipe according to an embodiment of the present invention.

As shown in Figure 1 and 2, the pipe 10 according to an embodiment of the present invention is the first synthetic resin pipe 12, the second synthetic resin pipe 12 disposed to be adjacent to the first synthetic resin pipe 12 And a pipe connecting device 20 disposed between the first synthetic resin pipe 12 and the second synthetic resin pipe 14 to connect the first synthetic resin pipe 12 and the second synthetic resin pipe 14. The first synthetic resin pipe 12 and the second synthetic resin pipe 14 are provided in plural so as to be adjacent to each other, and the pipe connecting device 20 also has a plurality between the first synthetic resin pipe 12 and the second synthetic resin pipe 14. Is provided.

The pipe connecting device 20 includes a first connecting member 21 coupled to the first synthetic resin pipe 12, a second connecting member 26 coupled to the second synthetic resin pipe 14, and a first connecting member 21. A plurality of fixings for tightening the first flange 32 arranged around the second flange, the second flange 35 arranged around the second connecting member 26, the first flange 32 and the second flange 35. Bolt 38 and nut 39.

The first connecting member 21 has a shape corresponding to the first synthetic resin pipe 12 so that it can be connected to the end of the first synthetic resin pipe 12, the first pipe connecting portion 22, the first pipe connecting portion 22 On the front surface of the first head portion 23, the first pipe connection portion 22 and the first connection hole 24 formed through the first head portion 23, the first head portion 23 provided at one end It includes a sealing portion 25 protruding. The first head part 23 has a diameter larger than the diameter of the first pipe connection part 22, and the sealing part 25 surrounds the first connection hole 24 on the outer surface of the first head part 23. It is provided in a ring shape. The first pipe connecting portion 22 is coupled to the end of the first synthetic resin pipe 12 in a variety of ways, such as fusion, adhesion, mechanical coupling by a separate coupling member.

The second connecting member 26 has a shape corresponding to the second synthetic resin pipe 14 so that it can be connected to the end of the second synthetic resin pipe 14, the second pipe connecting portion 27, the second pipe connecting portion 27 On the front surface of the second head portion 28, the second pipe connection portion 27 and the second connection hole 29 formed through the second head portion 28, the second head portion 28 provided at one end It includes an insertion groove 30 is provided so that the sealing portion 25 can be inserted. The second head portion 28 has a diameter larger than the diameter of the second pipe portion 27, and the insertion groove 30 surrounds the second connection hole 29 on the outer side of the second head portion 28. It is provided in a ring shape. The depth of the insertion groove 30 is smaller than the projecting height of the sealing portion 25 is inserted into it. The second pipe connecting portion 27 is coupled to the end of the second synthetic resin pipe 14 by various methods such as fusion, adhesion, mechanical coupling by a separate coupling member.

The first flange 32 has a first through hole 33 into which the first pipe connection 22 can be inserted and a plurality of first coupling holes 34 arranged around the first through hole 33, The second flange 35 has a second through hole 36 into which the second pipe connection 27 can be inserted and a plurality of second engaging holes 37 arranged around the second through hole 36. The fixing bolt 38 is coupled to the second coupling hole 37 of the second flange 35 through the first coupling hole 34 of the first flange 32, and the nut 39 is connected to the second flange 35. Screwed to the end of the fixing bolt 38, which has passed through the second coupling hole 37. The first flange 32 and the second flange 35 may press the first head portion 23 of the first connecting member 21 or the second head portion 28 of the second connecting member 26 such as metal. It can be made of a variety of materials having a certain size of rigidity.

As shown in FIG. 2, the pipe connecting device 20 includes a first connecting member 21 coupled to the first synthetic resin pipe 12 and a second connecting member 26 connected to the second synthetic resin pipe 14. After being coupled, the first connecting member 21 and the second connecting member 26 are connected by the first flange 32 and the second flange 35 so that the first synthetic resin pipe 12 and the second synthetic resin pipe ( 14). At this time, the first flange 32 and the second flange 35 are tightened by the plurality of fixing bolts 38 and the nuts 39 to press the first head portion 23 toward the second head portion 28 and By pressing the second head portion 28 toward the first head portion 23, the sealing portion 25 inserted into the insertion groove 30 is strongly pressed against the second head portion 28.

The protruding height of the sealing portion 25 is greater than the depth of the insertion groove 30 so that the sealing portion 25 is squeezed stably to the insertion groove 30 of the second head portion 28, and the first connecting member 21 and The second connection member 26 can maintain a stable connection state without generating a gap. That is, the height of the protruding sealing portion 25 of the first connecting member 21 is formed slightly larger than the depth of the insertion groove 30 of the second connecting member 26, the width of the sealing portion 25 also the insertion groove ( Slightly larger than the width of 30). In addition, the end of the sealing portion 25 is made to be easily inserted into the insertion groove (30). Such a structure may have various structures such as a shape in which the sealing portion 25 and the insertion groove 30 are cut in a spherical ring or a tapered shape. Due to the structure as described above, the sealing portion 25 is press-fitted into the insertion groove 30 by the first flange 32 and the second flange 35 to prevent the leakage of the fluid completely.

The pipe connecting device 20 according to the present invention includes a first connecting member 21 connected to the end of the first synthetic resin pipe 12 and a second connecting member 26 connected to the end of the second synthetic resin pipe 14. Since it is compressed by the first flange 32 and the second flange 35 coupled to the plurality of fixing bolts 38, the first synthetic resin pipe 12 and the second synthetic resin pipe 14 may be firmly connected. In addition, since the protruding sealing portion 25 of the first connection member 21 is press-fitted into the insertion groove 30 of the second connection member 26, it is possible to prevent the leakage of the fluid. Conventional piping seals the pipe connection part with a sealing member made of a heterogeneous material such as rubber or silicone, so that the sealing efficiency decreases when used for a long time, but the pipe connection device 20 according to the present invention has a first connection made of rigid material Since the sealing part 25 which is the same as the member 21 is used, even if it uses for a long time, sealing efficiency will not fall.

3A to 3F show a method for repairing a buried pipe using a pipe connecting device according to the present invention.

First, as shown in FIG. 3A, the pipe 40 embedded in the basement is exposed to the outside. And the embedding pipe 41 which comprises a piping is partially cut | disconnected. At this time, the embedding pipe 41 is provided with two cut portions (C) disposed to face each other.

Next, the first flange 32 is coupled to one cut portion C of the embedded embedding pipe 41, as shown in FIG. 3B. When the embedding pipe 41 is a metal pipe, the first flange 32 may be welded to the embedding pipe 41. Next, the first synthetic resin pipe 42 is inserted into the cut embedding pipe 41, and the first connecting member 21 is coupled to the end of the first synthetic resin pipe 12. The first connection member 21 may be coupled to the end of the first synthetic resin pipe 12 in a variety of ways, such as fusion, adhesion, mechanical coupling by a separate coupling member. Here, the first connecting member 21 may be coupled to the first synthetic resin pipe 42, and then the first synthetic resin pipe 42 may be inserted into the buried pipe 41 through the cutting part C. In order to easily insert the long first synthetic resin pipe 42 into the embedding pipe 41, the first synthetic resin pipe 42 may be thin so that it can be easily bent.

Next, as illustrated in FIG. 3C, hot air is supplied to the first synthetic resin pipe 12 using the hot air supply device 45 and the hot air supply pipe 46. When the hot air is supplied to the first synthetic resin pipe 42, the first synthetic resin pipe 42 that is bent or wrinkled when inserted into the buried pipe 41 can be unfolded correctly. In addition, when the length of the first synthetic resin pipe 42 is increased through hot air supply, it is easy to connect another connecting member to the opposite end of the first synthetic resin pipe 42.

Next, as shown in FIG. 3D, the first flange 32 or the second flange 35 is coupled to the cut portion C of the embedding pipe 41, and the first synthetic resin pipe inserted into the embedding pipe 41. Another first connecting member 21 or second connecting member 26 is connected to the opposite end of 42.

Next, as shown in FIG. 3E, the second synthetic resin pipe 43 to which the second connection member 26 is coupled is inserted through another cut portion C of the embedding pipe 41. In this case, the first connecting member 21 and the second connecting member 26 face each other on the same line. The second connection member 26 may be connected to the second synthetic resin pipe 43 after inserting the second synthetic resin pipe 43 into the buried pipe 41. As in the first synthetic resin pipe 42, hot air may be supplied to the second synthetic resin pipe 43 inserted into the buried pipe 41 to correctly unfold the second synthetic resin pipe 43.

Next, as shown in FIG. 3F, the plurality of fixing bolts 38 are connected to the plurality of second coupling holes of the second flange 35 through the plurality of first coupling holes 34 of the first flange 32. 37) and then screw the nut 39 to the end of each of the fixing bolts 38 to tighten the first flange 32 and the second flange (35). At this time, the first flange 32 and the second flange 35 tighten the first connecting member 21 and the second connecting member 26, so that the sealing portion 25 of the first connecting member 21 is second. The first connection member 21 and the second connection member 26 are sealed by pressing the connection member 26.

In this piping repair method, when the embedding pipe 41 is made of metal, the first flange 32 or the second flange 35 may be welded to the embedding pipe 41. In this case, both the first flange 32 and the second flange 35 may be welded to the embedding pipe 41, or only one of them may be welded to the embedding pipe 41.

The pipe repaired through the piping repair method is a fluid flows along a plurality of newly connected synthetic pipe 42, 43, the existing buried pipe 41 is wrapped around the synthetic pipe (42, 43) synthetic resin pipe ( 42) (43) to protect the role. Therefore, it is possible to repair the pipe 40 without having to replace the buried pipe 41, it is not necessary to discard the existing buried pipe 41 can save the cost and time accordingly.

On the other hand, as shown in FIG. 4, the first flange 32 and the nut 39 are connected to the first flange 32 and the second flange 35 without being bonded to the buried pipe 41. When the 32 and the second flange 35 are tightened, the first flange 32 and the second flange 35, the first connecting member 21, and the second connecting member 26 may move. At this time, a gap G is generated between the end of the embedding pipe 41 and the second head portion 28 of the first head portion 23 or the second connection member 26 of the first connection member 21. This gap G is covered by the first flange 32 or the second flange 35 so that the first connecting member 21 or the second connecting member 26 is not exposed outside the buried pipe 41.

5A to 5C show a method of constructing a pipe using a pipe connecting device according to the present invention.

First, as shown in FIG. 5A, the first connecting member 21 is connected to one end of the first synthetic resin pipe 12, and the first flange 32 has one surface thereof of the first connecting member 21. It is coupled to the first pipe connecting portion 22 or the first synthetic resin pipe 12 of the first connecting member 21 to be in contact with the back of the first head (23). Then, the second connecting member 26 is connected to one end of the second synthetic resin pipe 14, and one side of the second flange 35 is connected to the rear surface of the first head 23 of the second connecting member 26. It is coupled to the second pipe connecting portion 27 or the second synthetic resin pipe 14 of the second connecting member 26 to be in contact.

Next, as shown in FIG. 5B, the first connecting member 21 and the second connecting member 26 are brought into contact with each other such that the sealing portion 25 is inserted into the insertion groove 30. Thereafter, another first connecting member 21 and the first flange 32 are coupled to the other end of the first synthetic resin pipe 12, and another second end is connected to the other end of the second synthetic resin pipe 14. The connecting member 26 and the second flange 35 are coupled. Of course, the first connecting member 21 and the second flange 35 are coupled to both ends of the first synthetic resin pipe 12, and the second connecting member 26 and both ends of the second synthetic resin pipe 14 are connected. After coupling the second flange 35, the first connecting member 21 and the second connecting member 26 may be in contact with each other.

Next, as shown in FIG. 5C, the first flange 32 and the second flange 35 are tightened with the plurality of fixing bolts 38 and the nuts 39 to form the first connecting member 21 and the second connecting member. (26) is crimped.

The construction method of the pipe can be connected to the synthetic resin pipe 12, 14 adjacent to each other by using the pipe connection device 20 can be increased the stability and reliability of the pipe (10).

On the other hand, Figure 6 and Figure 7 shows a modification of the pipe connecting apparatus according to the present invention.

In the pipe connecting device 50 illustrated in FIG. 6, two sealing parts 51 protrude from the front of the first head part 23 of the first connecting member 21, and the second connecting member 26 is formed. Two insertion grooves 30 corresponding to the two sealing parts 51 are provided on the front of the head part 28. The two sealing portions 51 are arranged concentrically around the first connecting hole 24, and the two insertion grooves 52 are arranged concentrically around the second connecting hole 29. In addition, the number of sealing portions 51 or the number of insertion grooves 52 may be variously changed.

The pipe connecting device 55 shown in FIG. 7 is formed in a tapered shape in which a plurality of sealing portions 56 gradually decrease in width as they go outward, and the plurality of insertion grooves 57 gradually move inward. It is made of tapered shape with a reduced width. This sealing structure has an advantage that the plurality of sealing portions 56 can be stably inserted into the plurality of insertion grooves 57 when the first connecting member 21 and the second connecting member 26 are tightened.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention, and the protection scope of the present invention is limited only by the matters described in the claims. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

10, 40 piping 12, 14, 42, 43: synthetic pipe
20, 50, 55: pipe connecting device 21, 26: first, second connecting member
22, 27: 1st, 2nd pipe connection part 23, 28: 1st, 2nd head part
24, 29: 1st, 2nd connection hole 25, 51, 56: sealing part
30, 52, 57: insertion groove 32, 35: the first and second flange
33, 36: 1st, 2nd through hole 34, 37: 1st, 2nd through hole
38: fixing bolt 39: nut
41: buried pipe

Claims (13)

In the pipe connecting device for connecting the first synthetic resin pipe and the second synthetic resin pipe,
A first pipe connecting portion having a shape corresponding to the first synthetic resin pipe so as to be connected to an end of the first synthetic resin pipe, and a first pipe connecting portion having a diameter larger than a diameter of the first pipe connecting portion at one end of the first pipe connecting portion; A first connection member having a first head portion, a first connection hole formed through the first pipe connection portion and the first head portion, and a sealing portion protruding to surround the first connection hole on the front surface of the first head portion;
A second pipe connecting portion having a shape corresponding to the second synthetic resin pipe so as to be connected to an end of the second synthetic resin pipe, and a second pipe connecting portion having a diameter larger than a diameter of the second pipe connecting portion at one end of the second pipe connecting portion; A second connection hole formed through the second head portion, the second pipe connection portion and the second head portion, and an insertion groove provided to allow the sealing portion to be inserted around the second connection hole on the front surface of the second head portion. A second connecting member having;
A first flange having a first through hole into which the first pipe connection part can be inserted and a plurality of first engaging holes disposed around the first through hole;
A second flange having a second through hole into which the second pipe connection part can be inserted and a plurality of second engaging holes disposed around the second through hole;
A plurality of fixing bolts coupled to the plurality of second coupling holes of the second flange through the plurality of first coupling holes of the first flange; And
And a plurality of nuts screwed to the ends of the plurality of fixing bolts passing through the plurality of second coupling holes of the second flange.
The method of claim 1,
Protruding height of the sealing portion is greater than the depth of the insertion groove pipe connecting device.
The method of claim 1,
The sealing portion is a pipe connecting device, characterized in that the plurality is arranged in a concentric shape around the first connection hole, the insertion groove is arranged in a concentric shape around the second connection hole.
The method of claim 1,
The sealing portion is formed in a tapered shape that gradually decreases in width, the insertion groove is also a pipe connecting device, characterized in that formed in a tapered shape corresponding to the sealing portion.
The method of claim 1,
And the first pipe connecting portion and the second pipe connecting portion are fused to the first synthetic resin pipe and the second synthetic resin pipe, respectively.
The method of claim 1,
And the first flange and the second flange are made of metal.
A plurality of first synthetic resin pipes;
A plurality of second synthetic resin pipes disposed to be adjacent to the plurality of first synthetic resin pipes; And
And a plurality of pipe connecting devices disposed between the first synthetic resin pipe and the second synthetic resin pipe to connect the first synthetic resin pipe and the second synthetic resin pipe.
The pipe connecting device,
A first pipe connecting portion having a shape corresponding to the first synthetic resin pipe so as to be connected to an end of the first synthetic resin pipe, and a first pipe connecting portion having a diameter larger than a diameter of the first pipe connecting portion at one end of the first pipe connecting portion; A first connection member having a first head portion, a first connection hole formed through the first pipe connection portion and the first head portion, and a sealing portion protruding from the first head portion to surround the first connection hole;
A second pipe connecting portion having a shape corresponding to the second synthetic resin pipe so as to be connected to an end of the second synthetic resin pipe, and a second pipe connecting portion having a diameter larger than a diameter of the second pipe connecting portion at one end of the second pipe connecting portion; A second connection hole formed through the second head portion, the second pipe connection portion and the second head portion, and an insertion groove provided to allow the sealing portion to be inserted around the second connection hole on the front surface of the second head portion. Having a second connecting member,
A first flange having a first through hole into which the first pipe connection part can be inserted and a plurality of first engaging holes disposed around the first through hole,
A second flange having a second through hole into which the second pipe connection part can be inserted and a plurality of second engaging holes disposed around the second through hole,
A plurality of fixing bolts coupled to the plurality of second coupling holes of the second flange through the plurality of first coupling holes of the first flange, and
And a plurality of nuts screwed to the ends of the plurality of fixing bolts passing through the plurality of second coupling holes of the second flange.
(a) exposing the underground pipes to the outside;
(b) partially cutting the buried pipe constituting the piping;
(c) engaging a first flange having a plurality of first engagement holes in either one of the two cutouts of the buried pipe formed to face each other;
(d) inserting a first synthetic resin pipe into one cut portion of the buried pipe to which the first flange is coupled;
(e) a first pipe connecting portion, a first head portion provided to have a diameter larger than a diameter of the first pipe connecting portion at one end of the first pipe connecting portion, and formed through the first pipe connecting portion and the first head portion; Preparing a first connecting member having a first connecting hole, a sealing portion protruding to surround the first connecting hole in the front of the first head portion, and connecting the first pipe connecting portion to the end of the first synthetic resin pipe step;
(f) engaging a second flange having a plurality of second engaging holes in the other of the two cuts of the buried pipe;
(g) inserting a second synthetic resin pipe into the cutout of the buried pipe to which the second flange is coupled;
(h) a second pipe connecting portion, a second head portion provided at one end of the second pipe connecting portion to have a diameter larger than the diameter of the second pipe connecting portion, formed through the second pipe connecting portion and the second head portion; Preparing a second connection member having a second connection hole and an insertion groove provided on the front surface of the second head part to surround the second connection hole, and connecting the second pipe connection part to the end of the second synthetic resin pipe; ;
(i) contacting the first connection member and the second connection member such that the sealing part is inserted into the insertion groove; And
(j) The plurality of fixing bolts are inserted into the plurality of second coupling holes of the second flange through the plurality of first coupling holes of the first flange, and the plurality of fixing bolts passing through the plurality of second coupling holes. Tightening the first flange and the second flange by screwing a plurality of nuts to the end of the bolt.
The method of claim 8,
After the step (d), supplying hot air to the first synthetic resin pipe to straighten the first synthetic resin pipe; And
And after step (g), supplying hot air to the second synthetic resin pipe to straighten the second synthetic resin pipe.
The method of claim 8,
When the first flange, the second flange and the buried pipe is made of metal,
Step (c) includes welding the first flange to the buried pipe,
Step (f) comprises the step of welding the second flange to the buried pipe repair method.
The method of claim 8,
When the first connecting member and the second connecting member is made of synthetic resin,
The step (e) includes the step of fusing the first pipe connection to the end of the first synthetic resin pipe,
Step (h) is a repair method of the pipe, characterized in that it comprises the step of fusion bonding the second pipe connection to the end of the second synthetic resin pipe.
(a) a first pipe connecting portion, a first head portion provided to have a diameter larger than a diameter of the first pipe connecting portion at one end of the first pipe connecting portion, and formed through the first pipe connecting portion and the first head portion; Preparing a first connecting member having a first connecting hole and a sealing part protruding from the first head to surround the first connecting hole, and connecting the first pipe connecting part to an end of the first synthetic resin pipe; ;
(b) preparing a first flange having a first through hole through which the first synthetic resin pipe and the first pipe connection part can pass, and a plurality of first coupling holes arranged around the first through hole, and Coupling a flange to the first synthetic resin pipe or the first pipe connection such that one surface thereof is in contact with a rear surface of the first head portion;
(c) a second pipe connecting portion, a second head portion provided at one end of the second pipe connecting portion to have a diameter larger than the diameter of the second pipe connecting portion, formed through the second pipe connecting portion and the second head portion; Preparing a second connection member having a second connection hole and an insertion groove provided on the front surface of the second head part to surround the second connection hole, and connecting the second pipe connection part to an end of the second synthetic resin pipe;
(d) preparing a second flange having a second through hole through which the second synthetic resin pipe and the second pipe connection part can pass, and a plurality of second engaging holes arranged around the second through hole, and Coupling a flange to the second synthetic resin pipe or the second pipe connection such that one side thereof is in contact with a rear surface of the second head portion;
(e) contacting the first connection member and the second connection member such that the sealing part is inserted into the insertion groove; And
(f) A plurality of fixing bolts are inserted into the plurality of second coupling holes of the second flange through the plurality of first coupling holes of the first flange, and the plurality of fixing bolts passing through the plurality of second coupling holes. And screwing the plurality of nuts at the end of the bolt to tighten the first flange and the second flange.
13. The method of claim 12,
When the first connecting member and the second connecting member is made of synthetic resin,
The step (a) comprises fusing the first pipe connection to the end of the first synthetic resin pipe,
Step (c) comprises the step of fusion welding the second pipe connection to the end of the second synthetic resin pipe.

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