JP2000088174A - Cap for extracting water and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily extract water at a water pooling portion by constituting a cap for extracting water mounted on a saddle type branch coupling fixed to a gas conduit so as to extend a cylinder body to the upper side of a body part attachably screwed into the saddle type branch coupling. SOLUTION: When a saddle type branch coupling 20 is connected with a city gas main pipe 10, a connector pin 25 is connected with a cable, wire 26 of a saddle part is energized and an electric fusion connection is performed, after the saddle part is fixed to the city gas main pipe 10. Next, a cap for closing is removed from a main body 22, a punching tool is mounted on the main body 22 and the city gas main pipe 10 is punched. Next, in a state that a no-blow back is mounted on the main body 22, the punching tool is removed and a cap 1 for extracting water is mounted on an upper tip part of the main body 22. A water discharge pipe 12 is inserted into a cylinder body 3 of the cap 1 and the pipe 12 is inserted into the city gas main pipe 10 through a branch port 23 of the main body 22. In this state, water in the city gas main pipe 10 is sucked by a sucking device 13 and is discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water removing cap attached to a saddle type branch joint fixed to a gas pipe for discharging water collected in a city gas main pipe made of a thermoplastic resin such as polyethylene. It concerns the method of water removal.

[0002]

2. Description of the Related Art Conventionally, there is a case where a water drain is provided in a facility of a city gas main. Since the city gas contains a little water, water is collected by collecting water at various places of the city gas main pipe 10 as shown in FIG. A drainage pipe 12 is connected to a water reservoir of the water removal device 11, and water collected in the water removal device 11 is discharged and removed from the water drainage tube 12. As a method of removing water,
A suction device 13 such as a pump is disposed at an end of the drain pipe 12,
A method of sucking water by the force of the suction device 13 is generally performed.

[0003]

In such a method in which the water drainer 11 is previously piped in a pipeline, the main pipes 10, 10 connected to the left and right of the water drainer 11 are erroneously connected as shown in FIG. In particular, when the plumbing is installed at a high level on the pipeline, the water contained in the city gas does not accumulate well in the plunger 11 and accumulates in another low piping location. Occurs. In such a case, no matter how much the water is sucked by the suction device 13, the water cannot be removed, and as a result, the supply of the city gas is poor. In addition, even if the drainer 11 is connected horizontally at the time of piping, if the position level of the drainer 11 shifts to a higher position level on the pipeline due to subsequent vibration or land subsidence, the same as described above. Troubles occur.

[0004] On the other hand, if the gas supply failure occurs due to the insertion and intrusion of water without previously arranging the water drainer 11 in the pipeline, the location of the water intrusion is specified, and the location of the inflow of the water is determined. After a bypass is installed between the water and the downstream, the pipe is cut, and a drain is installed using a tee or the like to discharge water. In that case, in order to install and remove the water drain,
Large-scale construction, such as the need for large-scale excavation, the need to install a bypass, the need for disconnection and connection work, and the need to announce to consumers due to the temporary cutoff of city gas. Will be.

The present invention has been made to solve the above problems and to provide a water removing cap and a water removing method capable of easily draining water at a pool.

[0006]

The gist of the present invention is to provide a body which is detachably screwed to a saddle type branch joint fixed to the outer peripheral surface of a gas main pipe, and which communicates with the inside of the body. It is a water removal cap including a cylindrical body extending above the body.
Further, a saddle-type branch joint having a branch port is fixed to an outer periphery of a water pool portion of the gas main pipe, and a water body having a body having a cylindrical body extending upward after piercing the gas main pipe by piercing means. Attach the take-off cap to the saddle-type branch joint, and in this state, after discharging the water in the gas main pipe to the outside through the saddle-type branch joint and the water-take cap, remove the water-take cap. This is a method for removing water from the gas main pipe, in which a closing cap is attached to the saddle type branch joint.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a half sectional view of a water removing cap showing one embodiment of the present invention, and FIG. 2 is a half sectional view showing the water removing cap mounted on a saddle type branch joint.
FIG. 3 is an example of a construction state diagram performed using a water removal cap. Further, FIG. 4 is an example of a construction state diagram in which a closing cap is mounted after the water removing operation. A saddle-type branch joint 20 shown in FIG. 2 includes a main body 22 having a shaft hole 21, a saddle portion 24 provided at a lower end of the main body and forming a concentric branch port 23 communicating with the shaft hole 21, and a main body upper end. It comprises a closing cap 30 to be described later, which is screwed over the portion and has an O-ring 31 inside which is joined to the upper surface of the main body.

[0008] The saddle-type branch joint 20 is configured as described above, and is connected to the city gas main pipe as follows. First, after detecting a water puddle point of the city gas main pipe, excavating around the place, fixing the saddle portion 24 to the city gas main pipe 10 with a clamp, and then connecting a controller cable to the connector pin 25, Saddle part 24
The wire 26 embedded in the wire is energized to perform electric fusion splicing. Next, the cap 30 for closing is removed from the main body 22,
A piercing tool is attached to the main body 22 as a piercing means to pierce the city gas main pipe 10. Next, the drilling tool is removed (not shown) with the no-blow back attached to the main body 22 by applying the no-blow method, and the water removing cap 1 is attached to the upper end of the main body 22. The no-blow method such as the above-mentioned no-blowback method is a well-known technique widely used in a branching operation of a main pipe, and a detailed description thereof will be omitted.

Further, instead of using a drilling tool as the drilling means, a cutter which is screwed into the shaft hole 21 by a screw and which can be rotated and slidably moved forward and backward may be mounted inside the main body 22 (see FIG. 1). Not shown). In this case, when the cutter is screwed and rotated by the lead of the screw, the cutter is propelled and the city gas main pipe 10 is perforated. After the perforation, the cutter is retracted by rotating in the reverse direction to remove the cutter from the main body 22.

Here, the water removing cap 1 has a body 2 and a cylindrical body 3 extending above the body 2. The trunk 2
The and the cylindrical body 3 are separately formed by injection molding and extrusion molding, and then they are joined by heat fusion such as butt fusion. A screw 2a is provided on the inner periphery of the body 2 so as to be detachable from the saddle-type branch joint 20, and the screw 2a can be detachably screwed to the main body 22 of the saddle-type branch joint 20. The cylindrical body 3 and the body 2 communicate with each other inside, and enable a water removal operation described later. Further, an O-ring 4 is provided inside the water removing cap 1, and when it is screwed over the upper end of the main body 22, it is pressed against one end surface of the main body 22 to perform sealing with the outside.

Next, a drain pipe 12 such as a hose is inserted into the cylindrical body 3 of the water removing cap 1, and a branch port 23 of the main body 22 is inserted.
Through the drain pipe 12 into the city gas main pipe 10. In this state, the water accumulated in the city gas main pipe 10 is sucked and discharged by a suction device 13 such as a pump. When the excavation depth in the ground is deep and the length of the cylindrical body 3 is short, one end of the cylindrical body 3 and one end of the extension pipe 14 are connected by a joint 15 in order to extend the cylindrical body 3. May be.

After the water removal operation, the water removal cap 1 is removed, and then the closing cap 30 is screwed to the upper end of the main body to seal. In order to prevent creep due to long-term use or poor dimensional accuracy of the joint fitting portion and insufficient sealing performance, seal with the O-ring 31 in addition to the screw seal of the closing cap 30 To maintain their sexuality.

[0013]

As described above, according to the present invention, the use of the water collecting cap makes it possible to reduce the excavation area of the water collecting portion and to eliminate the need for the pipe installation of the water collecting device. Can be easily performed.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a water removing cap showing one embodiment of the present invention.

FIG. 2 is a half cross-sectional view showing a water removal cap according to an embodiment of the present invention mounted on a saddle type branch joint.

FIG. 3 is a construction state diagram performed using a water removal cap according to an embodiment of the present invention.

FIG. 4 is a construction state diagram in which a closing cap is attached after a water removing operation.

FIG. 5 is a diagram showing a state of water removal performed using a conventional water remover.

FIG. 6 is another construction state diagram performed using a conventional water removal device.

[Explanation of symbols]

1: Cap for water removal 2: Body 20: Saddle type branch pipe joint 2a: Screw 3: Cylindrical body 4: O-ring 10: Gas main pipe 11: Water removal device 12: Drain pipe 13: Suction device 20: Saddle type Branch joint 21: Shaft hole 22: Main body 23: Branch port 24: Saddle part 25: Connector pin 26: Wire 30: Closure cap 31: O-ring

Continued on the front page (72) Inventor Shigeru Mizutani 2nd Daifuku, Kuwana-shi, Mie Prefecture Inside the Kuwana Plant, Hitachi Metals Co., Ltd. 3H019 AA01 AA04 AA07 BA04 BB02 BB08 DA03 DA10 GA03

Claims (2)

[Claims] 1. A body which is detachably screwed to a saddle type branch joint fixed to an outer peripheral surface of a gas main pipe, and a cylindrical body which communicates with the inside of the body and extends above the body. A water removal cap comprising: 2. A torso having a cylindrical body extending upward after a gas main pipe is pierced by a piercing means, and a saddle-type branch joint having a branch port is fixed to an outer periphery of a water collecting portion of the gas main pipe. Is attached to the saddle-type branch joint, and in this state, water in the gas main pipe is discharged to the outside through the saddle-type branch joint and the water-take cap, and then the water-take cap is provided. And removing a closing cap from the saddle-type branch joint.