JP2008106443A - Pipe closing implement for buried-pipe filling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the efficiency of a buried-pipe filling method for filling an internal space of the buried pipe by injecting a filler such as slurry mortar into the unused buried pipe from its one end, and to reduce working hours. <P>SOLUTION: This pipe closing implement 1 comprises: a pipe 2 which can be inserted into the pipe opening 11a of the unused buried pipe 11; a fixing implement 6 for fixing the pipe to the pipe opening; and a seal member 7 for closing a gap between an inner surface of the pipe opening and the other end-side outer periphery of the pipe inserted into the pipe opening. The pipe closing implement 1 is fixed to the pipe opening 11a; the fluid filler is injected into the unused buried pipe 11 through the inside of the pipe via a hose 12 which is connected to one end of the pipe 2; and a backflow of the filler is stopped by a check valve 5 which is provided inside the pipe 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tube opening obturator used when filling a space in a pipe by injecting a filler into an underground pipe.

  Some of the buried pipes such as electric cable wiring pipes, water and sewage pipes, and gas pipes buried in the ground across multiple manhole spans are no longer used after the end of their missions. Say). If this idle buried pipe is left as it is, it will deteriorate and become crushed and cause the ground to collapse. Therefore, the idle buried pipes under the road and the like are required to be filled with a filler.

  The internal space of the idle buried pipe can be filled by injecting a fluid filler such as slurry mortar into the pipe. This method is called buried pipe filling method. The buried pipe filling method is disclosed in Patent Documents 1 and 2 below.

  In both methods disclosed in Patent Documents 1 and 2, a filler pump is disposed on the ground, a hose extended from the pump is connected to one end of an idle buried pipe, and the filler is passed through the hose. Supply and inject into the idle buried pipe.

  The preparatory work up to the start of filling material filling and the post-treatment after filling material filling when the methods disclosed in Patent Documents 1 and 2 are carried out have been performed as follows.

Operation 1: Insert a resin pipe as a joint into one end of the idle buried pipe, and fill a gap between the pipe and the idle buried pipe with a water stop cloth.
Work 2: After work 1 is completed, fast-drying cement is applied between the pipe opening and the pipe and dried to fix the pipe to the pipe opening.
Work 3: Connect the pipe fixed to the pipe opening and the hose extended from the above-mentioned filler pump for filling with a connecting hose (hose called Sunny hose) that can be folded and stored. The connecting hose is fastened with a hose band at one end and fixed to the outer periphery of the inlet side of the pipe, and the other end is fixed by attaching a wire or the like to the outer periphery of the hose extended from the pump for pumping.
Work 4: After completing the above preparatory work, the filler is injected into the idle buried pipe.
Operation 5: After completion of the filling of the filler, the connecting hose is tied in the middle of the length of the connecting hose, and the opening of the hose is closed.
JP-A-2005-83036 JP 2005-120630 A

  In the above-described method, it takes 20 to 30 minutes for the above operation 1, about 20 minutes for applying the cement for operation 2, about 30 minutes for drying the cement, and about 20 minutes for installing the connection hose for operation 3, and only preparation. But it took a long time to go over an hour. The operation 5 after filling the filler takes time, and the time required for the construction method is increased due to these factors.

  An object of the present invention is to improve the efficiency and shorten the working time of the buried pipe filling method disclosed in Patent Documents 1 and 2.

In order to solve the above-described problems, the present invention provides a tube opening obturator that closes the tube opening on the filler injection side of an idle buried tube. The tube opening obturator is provided with a check valve in which a flow from one end side to the other end side is provided in a forward direction, and the other end side can be inserted into the tube port, and this pipe is connected to the tube port. And a seal member that closes a gap between the inner surface of the pipe opening and the outer periphery of the other end of the pipe inserted into the pipe opening.
In this tube port closing tool, the other end side of the pipe is inserted into the tube port and fixed to the tube port with the fixing device. In this state, a hose is connected to one end of the pipe, and the fluidity is passed through the hose. It is configured to inject the filled material into the buried pipe and stop the back flow of the filled material with the check valve, so that it can be easily attached to the pipe opening and does not require post-treatment after filling the filled material. effective.

Preferred forms of the tube opening obturator are listed below.
(1) A tube having an air filling port with a check valve is wound around the outer periphery of the other end of the pipe to form the fixture, and the tube is inflated with air and pressed against the inner peripheral surface of the tube port. Let it be fixed to the tube mouth.
(2) An air hose for supplying air is attached to the air filling port of the tube.
(3) The seal member is made of urethane sponge, the urethane sponge is formed in a cylindrical shape, and is fitted to the outer periphery on the other end side of the pipe.
(4) The check valve comprises an annular valve seat concentric with the center of the pipe provided inside the pipe, and a flap valve that contacts and separates from the annular valve seat.
(5) The pipe is constituted by a different diameter pipe having a small diameter at one end and a large diameter at the other end, and the check valve is installed inside the other end of the pipe.
(6) An annular convex portion is provided on the outer periphery on one end side of the pipe.

  In the tube opening obturator of the present invention, a hose is connected to one end of a pipe fixed to the tube port, and the supplied filler is injected from the pipe into the idle buried tube via the hose. The pipe is fixed to the pipe opening by a fixing tool provided on the pipe opening obturator, and the seal between the outer periphery of the other end of the pipe and the inner peripheral surface of the pipe opening is made by a seal member. Therefore, the above-described operations of packing the waste in the operation 1, applying the quick-drying cement in the operation 2, and drying are unnecessary.

  Further, backflow and leakage of the filler injected into the idle buried pipe are prevented by a check valve provided inside the pipe. Therefore, it is not necessary to use a connection hose which has been used conventionally, and the connection hose installation (above operation 3) and the connection hose mouth closing and cutting (above operation 5) are omitted. As a result, preparation and post-processing are simplified, work efficiency is improved, and time until all work is completed is greatly reduced.

  In addition, what uses the above-mentioned tube as a fixture of a tube opening obstruction | occlusion device should just inflate the tube wound around the outer periphery of a pipe with air after inserting the other end side of a pipe into a tube opening, and to a tube opening Fixing work becomes very easy. Moreover, the internal pressure of a tube can be raised and the fixing force by friction can be increased, and it is easy to ensure the stability of fixation.

  An air hose attached to the air filling port of the tube can supply air by connecting an air pump to the air hose, and is less subject to work restrictions when the tube is inflated.

  Furthermore, when the seal member is made of urethane sponge, the urethane sponge is excellent in elastic deformability, so it absorbs the fluctuation amount of the difference in diameter between the inner diameter of the pipe opening and the outer diameter of the other end of the pipe to ensure a reliable seal. It can be carried out.

In addition, when the check valve is composed of an annular valve seat concentric with the center of the pipe provided inside the pipe and a flap valve that contacts and separates from the annular valve seat, the check valve structure is simple and assembled. It is easy and the cost can be reduced.

  Further, the pipe using a different diameter pipe having a small diameter at one end and a large diameter at the other end can form a check valve seat at a step portion between the small diameter portion and the large diameter portion of the pipe. In general, many idle buried pipes have a larger inner diameter than the hose extended from the filler pump, but the difference between the inner diameter of such an idle buried pipe and the outer diameter of the other end of the pipe is reduced. The stability of fixing the tube obturator to the tube opening can be increased by shrinking.

  In addition, pipes with an annular projection on the outer periphery on one end side can engage the housing of the housing-type pipe joint with the annular projection, making it easier to connect the hose using the housing-type pipe joint. It becomes possible to do.

  Hereinafter, an embodiment of a tube opening obturator according to the present invention will be described with reference to FIGS. 1 and 2 includes a pipe 2 serving as a main body, a check valve 5 provided inside the pipe 2, and a fixture provided on the outer periphery of the large-diameter portion 4 of the pipe 2. 6 and a seal member 7.

  The pipe 2 of the illustrated obturator is made of vinyl chloride resin (PVC). The illustrated pipe 2 is obtained by adding a short small diameter pipe and a large diameter pipe to both sides of a different diameter socket used as a pipe joint, and forming a small diameter portion 3 on one end side and a large diameter portion 4 on the other end side, respectively. However, the material and shape of the pipe are not limited to those described here. The large-diameter portion 4 of the pipe 2 has a thickness that can be inserted into the tube port 11a of the idle buried tube 11 shown in FIG.

  Moreover, the annular convex part 3a which comprises a pipe joint is provided in the one end side outer periphery (outer periphery of the front-end | tip part of the small diameter part 3) of the pipe 2. As shown in FIG.

  The check valve 5 is a valve that sets the flow from one end side to the other end side as a forward direction and prevents a reverse flow. The illustrated check valve 5 includes a flap valve 5a formed of a rubber disk and a valve seat 5b for contacting and separating the valve. The valve seat 5b is formed by attaching a sleeve with an inner flange to the end of the small-diameter portion inside the large-diameter portion 4 of the pipe 2 by bonding or the like, and is formed by the inner flange of the sleeve, and is concentric with the center of the pipe 2 It is an annular valve seat. A part of the flap valve 5a is fixed to a part of the annular valve seat 5b by using a bolt 5c or the like, and the flap valve 5a is brought into close contact with the entire area of the annular valve seat 5b to fill the idle buried pipe. I try to prevent backflow.

  The fixture 6 is configured by winding a rubber endless tube 6 a around the outer circumference of the large-diameter portion 4 several times. The tube 6a is a diversion of a city cycle tube and has an air filling port 6b with a check valve (not shown) called a Woods valve. Here, an air hose 6c is attached to the air filling port 6b. The air hose 6c can be connected to an air pump (not shown) using a connector 6d provided at the end of the hose.

  The seal member 7 is formed in a cylindrical shape and uses a urethane sponge whose outer diameter is larger than the inner diameter of the port 11 a of the idle buried pipe 11, and the urethane sponge is used as an outer periphery on the other end side of the pipe 2 ( The outer periphery of the large diameter portion 4 is fitted.

  The annular convex portion 3a provided on the outer periphery of the one end side of the pipe 2 may be formed integrally with the small diameter portion 3 of the pipe 2, but in terms of cost, a separate sleeve is fixed to the outer periphery of the straight pipe. It is advantageous to produce it.

  A method of using the tube opening obturator 1 configured as described above will be described below. FIG. 3 shows the vicinity of the pipe opening 11 a of the idle buried pipe 11 opened to the manhole 10. The idle buried pipe 11 is preliminarily subjected to pretreatment for filling material injection by the method disclosed in the above-mentioned Patent Documents 1 and 2.

  First, the water sealing member 7 of the tube closure 1 carried into the manhole 10 is compressed and elastically deformed, and in this state, the other end side (large diameter portion 4 side) of the pipe 2 is placed on the idle buried pipe 11. Insert into the tube port 11a. At this time, the seal member 7 formed of urethane sponge is elastically restored and is brought into close contact with the tube port 11a, thereby filling a gap between the inner diameter of the tube port 11a and the outer periphery of the large-diameter portion 4.

  Next, an air pump (not shown) is connected to the air hose 6c, and the tube 6a is inflated with air supplied from the pump as shown in FIG. 4, and the tube 6a is brought into pressure contact with the inner surface of the port 11a to generate frictional force. Then, the tube port obturator 1 is fixed to the tube port 11a. The attachment of the tube opening obturator 1 is thus completed. The time required is only a few minutes.

  Thereafter, the hose 12 for supplying the filler is connected to one end of the pipe 2 protruding into the manhole. The hose 12 extends from a filling material pump (for example, the pump truck 15 in FIG. 6) arranged on the ground. Here, the connection of the hose 12 is connected to a known housing type pipe shown in FIG. The joint 13 is used. A pipe 14 is attached in advance to the tip of the hose 12 so as to butt against the tip of the small diameter portion 3 of the pipe 2. The pipe 14 is provided with an annular convex portion 14a corresponding to the annular convex portion 3a on the outer periphery of the distal end. The pipe 14 is abutted against the distal end of the small diameter portion 3 of the pipe 2, and the housing 13a of the pipe joint 13 (this is divided into two parts). Then, the pipe 14 is connected to the small diameter part 3 of the pipe 2 by covering the butt end. Reference numeral 16 in FIG. 6 denotes a filler transport vehicle.

When the above preparatory work is completed, the pump for pumping is driven and a filler such as slurry mortar is injected into the idle buried pipe 11 via the pipe opening obturator 1. At the time of injection, the flap valve 5a is elastically deformed by the flow pressure of the filler as shown by a chain line in FIG. 5, and the check valve 5 is opened, so that the injection of the filler is not hindered.

When the filler is filled into the idle buried pipe 11, the filling is stopped, the housing of the pipe joint 13 is removed, and the hose 12 is disconnected from the tube closing device 1. As a result, the filler injected into the idle buried pipe 11 tries to flow backward, but when a reverse flow pressure is generated, the check valve 5 is closed by the pressure to prevent leakage of the injected filler. Therefore, the troublesome work for preventing the backflow is unnecessary, and the whole work of the buried pipe filling method is completed.

  As described above, when the tube opening obturator 1 according to the present invention is used, preparation and post-processing at the time of carrying out the buried pipe filling method are simplified, the labor of the work is reduced, and the total work time can be greatly shortened.

  In addition, the tube opening obturator 1 attached to the tube opening is what is called a fitting kill. Accordingly, it is preferable to use an inexpensive material to reduce the cost. In view of this, the pipe 2 is preferably a resin pipe that is inexpensive and light in weight and excellent in handleability compared to a metal pipe.

  The hose 12 may be connected to the pipe 2 using, for example, a pipe joint other than a housing-type pipe joint such as a flange joint. The annular convex portion 3a provided on the outer periphery of the end of the small diameter portion 3 of the pipe 2 is a flange. May be replaced.

  Further, the flap valve 5a of the check valve may be one in which one side of a rubber plate is reinforced with a resin plate or the like, and a portion excluding the seal surface is formed with a resin plate or the like. Such a flap valve is hinged at one location and pivoted about a hinge point to open and close.

  The fixture 6 using the exemplified tube is also preferable because the fixing operation is simple and the fixing force can be adjusted, but is not limited thereto. A flange provided on the outer periphery of the small diameter side end of the large diameter part 4 of the pipe 2 and the flange fixed to the wall surface around the pipe port of the idle buried pipe with an anchor bolt can be used.

  In addition, since it is an instrument installed in a manhole, if necessary, a hole-in anchor may be provided and anchored in the manhole.

The side view which shows an example of the tube opening obturator of this invention 1 is a longitudinal sectional view of the tube port obturator in FIG. Sectional drawing which shows the state which inserted the tube opening obturator of FIG. 1 in the tube opening of an idle buried pipe Sectional drawing which shows the state which fixed the tube port obturator of FIG. 1 inserted into the tube port to the tube port Sectional drawing which shows the state which connected the hose using the housing type pipe joint to the pipe opening obturator of FIG. The figure which shows the outline | summary of the buried pipe filling construction method performed using the tube opening obturator of FIG.

DESCRIPTION OF SYMBOLS 1 Pipe port obturator 2 Pipe 3 Small diameter part 3a Annular convex part 4 Large diameter part 5 Check valve 5a Flap valve 5b Annular valve seat 5c Bolt 6 Fixing tool 6a Tube 6b Air filling port 6c Air hose 6d Connecting tool 7 Seal member 10 Manhole DESCRIPTION OF SYMBOLS 11 Idle buried pipe 11a Pipe port 12 Hose 13 Housing type pipe joint 13a Housing 14 Pipe 14a Annular convex part 15 Pump car 16 Filler conveyance vehicle

Claims (7)

An instrument that is used by being attached to the filler inlet (11a) of the buried pipe when the filler is injected into the underground idle pipe (11),
A check valve (5) having a flow from one end side to the other end side as a forward direction is provided therein, and a pipe (2) whose other end side can be inserted into the pipe port (11a), and this pipe ( 2) A sealing member that closes a gap between the fixture (6) that fixes the pipe opening (11a) and the inner surface of the pipe opening (11a) and the outer periphery of the other end of the pipe (2) inserted into the pipe opening. (7)
The other end of the pipe (2) is inserted into the pipe opening (11a) and fixed to the pipe opening (11a) with the fixture (6). In this state, a hose (12) is connected to one end of the pipe (2). ), And a fluid filler is injected into the idle buried pipe (11) via the hose (12), and the backflow of the filler is stopped by the check valve (5). Pipe opening obturator for buried pipe filling method.   A tube (6a) having an air filling port (6b) with a check valve is wound around the outer periphery of the other end of the pipe (2) to constitute the fixture (6), and the tube (6a) is air The tube opening obturator for the buried pipe filling method according to claim 1, wherein the obturator is fixed to the tube opening by being inflated with a pressure contact with the inner peripheral surface of the tube opening (11a).   The tube closing device for buried pipe filling method according to claim 2, wherein an air hose (6c) for supplying air is attached to the air filling port (6b) of the tube (6a).   The buried pipe filling according to any one of claims 1 to 3, wherein the sealing member (7) is made of urethane sponge, the urethane sponge is formed in a cylindrical shape and is fitted to the outer periphery on the other end side of the pipe (2). Pipe closure for construction method.   The check valve (5) is composed of an annular valve seat (5b) concentric with the center of the pipe provided inside the pipe (2), and a flap valve (5a) that contacts and separates from the annular valve seat (5b). The closed-end obturator for buried pipe filling methods according to any one of claims 1 to 4.   The pipe (2) is constituted by a different diameter pipe having a small diameter at one end and a large diameter at the other end, and the check valve (5) is installed inside the other end of the pipe. A tube opening obturator for buried pipe filling method according to claim 1.   The pipe opening obturator for the buried pipe filling method according to any one of claims 1 to 6, wherein an annular convex part (3a) is provided on an outer periphery on one end side of the pipe (2).

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