JPH074576A - Branch pipe joint, drill and engineering method for branching sewer pipe in vaccum type sewerage system - Google Patents

Branch pipe joint, drill and engineering method for branching sewer pipe in vaccum type sewerage system

Info

Publication number
JPH074576A
JPH074576A JP18811193A JP18811193A JPH074576A JP H074576 A JPH074576 A JP H074576A JP 18811193 A JP18811193 A JP 18811193A JP 18811193 A JP18811193 A JP 18811193A JP H074576 A JPH074576 A JP H074576A
Authority
JP
Japan
Prior art keywords
branch pipe
sewer
pipe joint
main
cutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP18811193A
Other languages
Japanese (ja)
Other versions
JP3432247B2 (en
Inventor
Yonekazu Yamada
Yutaka Yoshino
豊 吉野
米数 山田
Original Assignee
Sekisui Chem Co Ltd
積水化学工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP5-97771 priority Critical
Priority to JP9777193 priority
Application filed by Sekisui Chem Co Ltd, 積水化学工業株式会社 filed Critical Sekisui Chem Co Ltd
Priority to JP18811193A priority patent/JP3432247B2/en
Publication of JPH074576A publication Critical patent/JPH074576A/en
Application granted granted Critical
Publication of JP3432247B2 publication Critical patent/JP3432247B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To connect a branch pipe as a main pipe is working without using any jig by placing a saddle part of a branch pipe joint provided with a flow path opening and closing member into intimate contact with a branching part of the main pipe to which the branch pipe is connected and disposing the opening and closing member in the closed position after the main pipe is drilled by a drill attached to the branch pipe joint. CONSTITUTION:First in a branching operation of a sewer pipe, a saddle part 13 of a branch pipe joint 1 is stuck to a main sewer pipe P2 with fusion welding by electrification to a conductor 15. Next, a drill 3 enclosing cover 31 is mounted on the outside of a connection port 12 under the air-tight condition and a support member 33 of the drill 3 is mounted on a joint body 11 by bolting. Then, a cutter 32 is rotated by a motor to brill the main sewer pipe P2. After an opening and closing member 2 is located in the closing position after the drilling, the drill 3 is removed from the branch pipe joint 1. Then, a sewer branch pipe is connected to a connection port 12 of the branch pipe joint 1 with fusion welding by electrification to a conductor 14. After the connecting operation, the opening and closing member 2 is opened to afford communication between the main sewer pipe P2 and the sewer branch pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branching method for a sewer pipe in a vacuum type sewer system, and a branch pipe joint and a drilling tool used in the branching method.

[0002]

2. Description of the Related Art In recent years, a vacuum sewer system that collects sewage discharged from each household at a vacuum pumping station by means of a sewage pipe with a negative pressure inside, and further pumps it from the vacuum pumping station to a sewage treatment plant. A system (see Japanese Patent Laid-Open No. 3-87432) has come to be adopted. This vacuum sewer system forcibly guides sewage to the sewage treatment plant by adjusting the internal pressure of the sewage pipe by the vacuum pumping station, so it is possible to pipe the sewage pipe along the natural gradient and in the case of the natural flow-down system. It has an advantage that the sewer pipe can be configured with a small diameter pipe. And, in the area where this vacuum type sewer system is adopted, it is naturally expected that it will be necessary to branch the sewer pipe in the future due to the expansion of houses.

[0003]

However, this branching work is carried out by a construction method similar to that of the natural flow-down method, that is, Japanese Patent Laid-Open No.
After being fixed to the sewer main pipe (existing sewer pipe), the saddle part of the branch pipe joint is inserted into the peripheral wall of the sewer main pipe from the main body of the branch pipe joint, as regulated in JP-A-3-219988. The branch pipe is used to make a hole, then the mouth of the main body of the branch pipe joint is closed with a plug, and the sewer branch pipe (new sewer pipe) is connected to the branch part of the branch pipe joint. Before pulling out the perforator from the mouth of the joint body and plugging the mouth, the atmosphere enters the inside of the sewer main from the hole opened in the sewer main, so the internal pressure of the sewer main There is a problem in that it deteriorates and interferes with the sewage collection function.

By the way, a method of branching work while maintaining the internal pressure of the pipe is known in the branching work of gas pipes. This construction method is disclosed in, for example, Japanese Patent Publication No. 57-4411.
As described in Japanese Patent Publication No. 5, after the punching tool is pulled out from the opening of the branch pipe joint, the punching tool and the plug fitting are integrated so that air does not enter the sewer main through the opening. A jig is used to seal the jig and the branch pipe joint with a bellows body. However, this construction method requires a jig having a complicated structure in which the punching tool and the plug mounting tool are integrated, which increases the manufacturing cost of the jig and requires a technique for using the jig. .

In view of the above problems, the present invention is capable of branching a sewer pipe in a vacuum sewer system without lowering the sewage collection function and without using a jig having a complicated structure. The purpose is to provide a sewage pipe branching method.

[0006]

In order to achieve the above object, according to the method of branching a sewer pipe in a vacuum sewer system of the present invention, a tubular body and a sewer that is formed at one end of the body are sewered. The main body includes a connection port connected to a branch pipe and a saddle portion formed at the other end of the main body and closely joined to the outer peripheral surface of the sewer main pipe. It is movably held between a closed position that shuts off the internal space of the connection port from the space on the side of the saddle and the space on the side of the saddle, and an open position that connects the space on the side of the connection and the space on the side of the saddle. A branch pipe joint in which the holding portion is formed,
A cutter that is insertably formed in the branch pipe joint according to claim 1, and a cutter that rotatably and slidably supports the cutter and is attached to the branch pipe joint so as to be inserted into a connection port of the branch pipe joint. It has been decided to use a punching tool that includes a support member and a sealing cover that is airtightly attached to the branch pipe joint to form a sealed space outside the cutter.

That is, the saddle portion of the branch pipe joint is closely joined to the sewer main pipe, and the sealing cover of the perforation tool is attached to the branch pipe joint in an airtight state to the outside of the cutter of the perforation tool. A closed space is formed in the
In the state where the opening / closing member of the branch pipe joint is arranged at the open position, the cutter pierces the main sewer pipe, and then the opening / closing member is arranged at the closed position, and then the piercing tool is connected to the branch pipe joint. Then, the sewer branch pipe was connected to the connection port of the branch pipe joint, and then the opening / closing member was placed in the open position so that the sewer main pipe and the sewer branch pipe were communicated with each other.

[0008]

[Operation] When branching a sewer pipe, first, the saddle part of the branch pipe joint is joined to the main sewer pipe in a close contact state,
And, a closed cover of the perforation tool is attached to the branch pipe joint in an airtight state to form a closed space outside the cutter of the perforation tool, and the opening / closing member of the branch pipe joint is arranged at the open position. In this state, the sewage main is pierced by the cutter provided in the piercing tool.

At this time, since the closed space is formed on the outside of the cutter, even if the sewer main is perforated, the atmosphere hardly penetrates into the sewer main, so that the internal pressure of the branch pipe joint is equal to that of the sewer main. The internal pressure of the sewage main is almost the same as it was before the perforation of the sewage main, only the same as the internal pressure.

Next, after placing the opening / closing member in the closed position, the punching tool is removed from the branch pipe joint.

At this time, since the internal space of the main body of the branch pipe joint is blocked by the opening / closing member between the space on the connection port side and the space on the saddle part side, the atmosphere is not removed even if the perforation tool is removed from the branch pipe joint. It hardly penetrates the sewer main, and the internal pressure of the sewer main is almost the same as it was before removing the perforator.

Then, a sewer branch pipe is connected to the connection port of the branch pipe joint. At this time, the sewage branch pipe is completely piped up to the container having the vacuum valve.

Then, the opening / closing member is arranged at the open position to connect the main sewer pipe and the sewer branch pipe. Then, the internal pressure of the main sewer pipe and the internal pressure of the sewer branch pipe become the same,
The sewage discharged from each household can be guided to the sewage main by the sewage branch pipe whose inside has a negative pressure.

[0014]

Embodiments of the present invention will be described in detail below with reference to the drawings. First, the configuration of a branch pipe joint of an embodiment corresponding to claim 1 of the present invention will be described based on FIGS. 1 and 2.

The branch pipe joint 1 of this embodiment is formed by injection molding of a thermoplastic resin such as polyethylene or vinyl chloride resin, and has a tubular shape with a circular cross section as shown in FIG. Main body 11 and its main body 11
Connection port 12 formed at one end of the main body 11 and connected to the sewer branch pipe P1 and a saddle portion 13 formed at the other end of the main body 11 and closely joined to the outer peripheral surface of the main sewer pipe P2.
And are equipped with.

In the branch pipe joint 1, conductive wires 14 and 15 are provided on the inner peripheral portion of the connection port 12 and the inner peripheral portion of the saddle portion 13.
Are embedded, and the connection port 12 and the sewage branch pipe P1 and the saddle portion 13 and the sewage main pipe P2 can be joined by fusion by energizing the conductive wires 14 and 15.

Further, the branch pipe joint 1 is composed of the main body 11 described above.
As shown in FIG. 2, the opening / closing member 2 is formed by forming a hole 21 having a diameter substantially equal to the inner diameter of the main body at one end of a rectangular plate material in the central part of the main body 11 and the hole 21 is provided outside the main body 11. The inner space of the main body 11 to the space on the side of the connection port 12 and the saddle part 1
It is slidable between a closed position where it is shut off from the space on the 3 side and an open position where a hole 2a is provided at a position where it overlaps with the main body 11 and the space on the connection port 12 side communicates with the space on the saddle portion 13 side. A holding portion 16 that holds the formed portion is formed.

Next, the construction of the punching tool of the embodiment corresponding to claim 2 of the present invention will be explained based on FIG. 3 and FIG.

As shown in FIG. 3, the punching tool 3 of this embodiment has a cutter (usually called a "holso") 32 that is insertable into the main body 11 of the branch pipe joint 1, and the cutter 32. A supporting member 33 which is rotatably and slidably supported and is attached to the main body 11 of the branch pipe joint 1 so that the cutter 32 can be inserted into the connection port 12 of the branch pipe joint 1.
And a hermetic cover 31 that is attached to the connection port 12 of the branch pipe joint 1 in an airtight state so as to form a hermetically sealed space outside the cutter 32.

The support member 33, as shown in FIG.
Bearing 3 in which the shaft 32a of the cutter 32 is inserted
3c and a base 3 formed so as to be attachable with bolts 37 and nuts 38 along the outer periphery of the main body 11 of the branch pipe joint 1.
3a and 3a are connected by an inverted L-shaped frame 33b.

The sealing cover 31 is a resin molded product, is formed in a shape that can be fitted to the outside of the connection port 12 of the branch pipe joint 1, and is provided inside the support member 33. . In addition, the sealing cover 31 serves as the connection port 12.
The inner peripheral surface of the cylindrical portion 31a provided along the outer peripheral surface of the elastic ring 34 (for example, an O-ring) that keeps the outer peripheral surface of the connection port 12 and the inner peripheral surface of the cylindrical portion 31a airtight. )
Is provided, and the end face of the connection port 12 and the ceiling part 31b are provided on the inner surface of the ceiling part 31b which is provided so as to close the connection port 12.
An elastic sheet 35 is provided for keeping an airtight state between the inner surface and the inner surface. Further, a hole 31c through which the shaft 32a of the cutter 32 is inserted is formed in the central portion of the ceiling part 31b, and the inner peripheral surface of the hole 31c is formed with the sealing cover 31 and the shaft 32a of the cutter 32. Two elastic rings 36 are provided to keep the space airtight.

Next, a method for branching a sewer pipe according to a third aspect of the present invention will be described with reference to FIGS.

When branching the sewer pipe, first, as shown in FIG. 5, the saddle portion 13 of the branch pipe joint 1 is welded to the sewer main pipe P2 in a close contact state. Then, the sealing cover 3 of the punching tool 3 is provided outside the connection port 12.
1 is attached in an airtight state to form a closed space outside the cutter 32 of the perforation tool 3, and further, the support member 33 of the perforation tool 3 is attached to the main body 11 of the branch pipe joint 1 with bolts 37 and nuts 38. . In addition, branch pipe joint 1
The opening / closing member 2 is placed in the open position.

Next, as shown in FIG. 6, the cutter 32 supported by the support member 33 of the punching tool 3 is rotated and slid by a motor (not shown) to punch the sewer main P2.

At this time, since the closed space is formed on the outer side of the cutter 32 by the closed cover 31, the atmosphere hardly penetrates into the main sewer pipe P2 even if the main sewer pipe P2 is perforated. The internal pressure of the main sewer pipe P
The internal pressure of the sewage main pipe P2 is almost the same as that before the perforation of the sewage main pipe P2.

Next, as shown in FIG. 7, the opening / closing member 2 is placed in the closed position, and then the punching tool 3 is removed from the branch pipe joint 1.

At this time, since the opening / closing member 2 blocks the internal space of the main body 11 of the branch pipe joint 1 between the space on the side of the connection port 12 and the space on the side of the saddle portion 13, the perforating tool 3 is connected to the branch pipe joint. Even if it is removed from 1, the atmosphere hardly enters the sewer main P2, so the internal pressure of the sewage main P2 is almost the same as before the removal of the perforation tool 3.

Next, as shown in FIG. 8, the sewer branch pipe P1 is connected to the connection port 12 of the branch pipe joint 1 by fusion. At this time, the sewer branch pipe P1 is completely piped up to a box (not shown) having a vacuum valve.

Then, as shown in FIG. 9, the opening / closing member 2 is arranged at the open position to connect the main sewer pipe P1 and the sewer branch pipe P2. Then, the internal pressure of the sewage main pipe P2 and the internal pressure of the sewage branch pipe P1 become the same, and the sewage discharged from each household is guided to the sewage main pipe P2 by the sewage branch pipe P1 whose inside is in a negative pressure state. be able to.

That is, in the sewage pipe branching method of this embodiment, the sewage main pipe P2 and the sewage branch pipe P1 can be connected while the internal pressure of the sewage main pipe P2 is maintained.
Sewage pipe branch work can be performed without deteriorating the sewage collection function. Moreover, since the branch pipe joint 1 and the perforation tool 3 used in this branching method have a simple structure, the manufacturing cost is not particularly high, and no special technique is required for use.

Next, a punching tool of another embodiment will be described with reference to FIG. FIG. 10 shows a state in which the punching tool of this embodiment is attached to the branch pipe joint.

The punching tool 6 of this embodiment has a cutter 61 that is insertable into the main body 11 of the branch pipe joint 1 and a cutter 61 that supports the cutter 61 so that the cutter 61 can rotate and slide. A support member 62 attached to the connection port 12 of the branch pipe joint 1 so as to be inserted into the connection port 12 of the joint 1, and an airtight state attached to the main body 11 of the branch pipe joint 1 to form a sealed space outside the cutter 61. The airtight cover 63 is provided.

The support member 62 is mounted on the outside of the motor case 62a in which a motor (not shown) for driving the cutter 61 is built, and is connected to the connection port of the branch pipe joint 1 by bolts and nuts. A frame 62b attached along the outer periphery of 12;
And a handle 62c is provided on the outside of the motor case 62a.

The sealing cover 63 is formed by reinforcing a cylindrical sealing sheet 63a that expands and contracts in the length direction with a plurality of metal rings 63b.
Is attached to the outer periphery of the motor case 62a of the support member 62 in an airtight state by the tightening band 7, and the other end is attached to the outer periphery of the main body 11 of the branch pipe joint 1 in an airtight state by the tightening band 7. .

That is, the perforation tool 6 of this embodiment can be substituted for the perforation tool 3 when the sewer pipe branching work is performed as described above.

The sealing sheet 63a may be made of any material having flexibility such as low density polyethylene resin, soft polyvinyl chloride resin, natural rubber, synthetic rubber, etc. It is more preferable to use a transparent material. After perforation, the vacuum pressure communicated with the main pipe reinforces the metal sheet 63b such as a metal wire so that the sealing sheet does not contract and entangle with the cutter 61. Further, the tightening band 7 is preferably made of metal in terms of strength.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention. For example, in the embodiment, the branch pipe joint in which the opening / closing member 2 formed by forming the hole 21 having the diameter substantially equal to the inner diameter of the main body at the one end of the rectangular plate member is provided is shown in FIG. As shown in FIG. 1, the opening / closing member 4 has a shape in which a hole 41 is formed through a spherical body.
As shown in FIG. 2, the opening / closing member 5 may have a shape in which a hole 51 is formed through the cylindrical body. Further, in the example, the branch pipe joint in which the conductive wire is embedded in the inner peripheral portion of the connection port is used, and the connection port and the sewer branch pipe are fusion-bonded to each other. A branch pipe joint provided with a ring may be used, and the joint between the connection port and the sewer branch pipe may be hermetically sealed with an elastic ring for mating connection, or nothing is provided on the inner peripheral portion of the connection port. It is also possible to use a non-branch pipe joint and fusion-bond the connection port and the sewer branch pipe by butt fusion. Furthermore, when attaching the saddle part of the branch pipe joint to the main sewer pipe, an elastic ring is provided between the saddle part of the branch pipe joint and the main sewer pipe to form a band between the saddle part of the branch pipe joint and the main sewer pipe. It may be tightened, or the inner peripheral surface of the saddle portion of the branch pipe joint and the outer peripheral surface of the sewer main pipe may be fusion-bonded by butt fusion. Also, the saddle part and the main sewer pipe, and the connection port and the branch pipe may be adhesively bonded. Further, in order to facilitate the removal of the cut pieces of the pipe, the hole saw may be divided into two parts.

[0038]

As described above, in the method for branching a sewer pipe according to claim 3 of the present invention, the sewer main pipe and the sewer branch pipe are connected while maintaining the internal pressure of the sewer main pipe. Therefore, it is possible to branch the sewer pipe without deteriorating the sewage collection function. Moreover, since the branch pipe joint according to claim 1 and the perforating tool according to claim 2 which are used in this branching method respectively have a simple structure, the manufacturing cost is not particularly high, and no special technique is required for use. unnecessary.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a branch pipe joint of an embodiment.

FIG. 2 is a component diagram of the branch pipe joint.

FIG. 3 is a partial cross-sectional view showing a punch according to an embodiment.

FIG. 4 is a bottom view showing the punching tool of the embodiment.

FIG. 5 is a view showing a branch construction method for a sewer pipe in an example, showing a state in which a branch pipe joint is attached to a sewer main pipe.

FIG. 6 is a view showing a method of branching a sewer pipe in an example, showing a state in which a sewer main is perforated by a perforation tool.

FIG. 7 is a diagram showing a method for branching a sewer pipe in an example, showing a state in which a perforating tool is removed from a branch pipe joint.

FIG. 8 is a diagram showing a branch construction method of a sewer pipe in an example, showing a state in which a sewer branch pipe is connected to a branch pipe joint.

FIG. 9 is a view showing a method of branching a sewer pipe of this embodiment, showing a state in which the sewer main pipe and the sewer branch pipe are communicated with each other.

FIG. 10 is a cross-sectional view showing a state in which a punching tool of another embodiment is attached to a branch pipe joint.

FIG. 11 is a modification of one component of the branch pipe joint.

FIG. 12 is a modification of one component of the branch pipe joint.

[Explanation of symbols]

 1 Branch Pipe Joint 11 Main Body 12 Connection Port 13 Saddle Part 16 Holding Part 2 Opening / Closing Member 3 Punching Tool 31 Sealing Cover 32 Cutter 33 Supporting Member

Claims (3)

[Claims]
1. A main body formed in a tubular shape, a connection port formed at one end of the main body and connected to a sewer branch pipe, and an outer peripheral surface of the main sewer pipe formed at the other end of the main body. A saddle part that is joined in a close contact state,
Between the open / close member, a closed position that shuts off the internal space of the main body into a space on the connection port side and a space on the saddle part side, and an open position that connects the space on the connection port side and the space on the saddle part side. A branch pipe joint characterized in that a holding portion movably held by is formed.
2. A cutter that is insertably formed in the branch pipe joint according to claim 1, and a branch pipe joint that slidably supports the cutter and that the cutter is inserted into a connection port of the branch pipe joint. A perforation tool comprising: a support member attached to the branch pipe joint; and a sealing cover attached to the branch pipe joint in an airtight state to form a closed space outside the cutter.
3. The saddle part of the branch pipe joint according to claim 1 is joined to the main sewer pipe in a close contact state, and the sealing cover of the perforation tool according to claim 2 is attached to the branch pipe joint in an airtight state. A closed space is formed on the outside of the cutter of the perforator, and further, the sewer main is perforated by the cutter in a state where the opening / closing member of the branch pipe joint is arranged in the open position, and then the After disposing the opening / closing member in the closed position, the perforation tool is removed from the branch pipe joint, and then a sewer branch pipe is connected to the connection port of the branch pipe joint, and then the opening / closing member is arranged in the open position to provide the sewage. A method for branching a sewer pipe in a vacuum sewer system, characterized by connecting a main pipe and a sewer branch pipe.
JP18811193A 1993-04-23 1993-07-29 Sewer pipe branching method in vacuum type sewer system and drilling tool used for the branching method Expired - Fee Related JP3432247B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP5-97771 1993-04-23
JP9777193 1993-04-23
JP18811193A JP3432247B2 (en) 1993-04-23 1993-07-29 Sewer pipe branching method in vacuum type sewer system and drilling tool used for the branching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18811193A JP3432247B2 (en) 1993-04-23 1993-07-29 Sewer pipe branching method in vacuum type sewer system and drilling tool used for the branching method

Publications (2)

Publication Number Publication Date
JPH074576A true JPH074576A (en) 1995-01-10
JP3432247B2 JP3432247B2 (en) 2003-08-04

Family

ID=26438918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18811193A Expired - Fee Related JP3432247B2 (en) 1993-04-23 1993-07-29 Sewer pipe branching method in vacuum type sewer system and drilling tool used for the branching method

Country Status (1)

Country Link
JP (1) JP3432247B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100624034B1 (en) * 2004-08-03 2006-09-19 영 식 김 An apparatus for tapping pipe
JP2015099024A (en) * 2013-11-18 2015-05-28 日立Geニュークリア・エナジー株式会社 Containment vessel inspection system, and containment vessel inspection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100624034B1 (en) * 2004-08-03 2006-09-19 영 식 김 An apparatus for tapping pipe
JP2015099024A (en) * 2013-11-18 2015-05-28 日立Geニュークリア・エナジー株式会社 Containment vessel inspection system, and containment vessel inspection method

Also Published As

Publication number Publication date
JP3432247B2 (en) 2003-08-04

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