JP2017193912A - Bypass device using water cutoff plug of sewerage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bypass device using a water cutoff plug that may be fitted on a pipe opening of a main sewerage pipe readily and cuts off water for certain regardless of a size of the sewerage pipe opening.SOLUTION: With a bypass device, a main sewerage pipe 22 is closed with water cutoff plugs 1, 2 when a manhole 21 is repaired, and a bypass pipe 3 is connected inside the manhole 21 for having sewage water flow through. The bypass device includes the water cutoff plug 1, the other water cutoff plug 2, and the bypass pipe 3. The bypass pipe 3 has pipe openings 3a, 3b on both sides fitted respectively on the water cutoff plug 1 and the other water cutoff plug 2. The water cutoff plug 1 and the other water cutoff plug 2 have an elastic closing part 5 that respectively presses from an inner periphery side of the main sewerage pipes 22, 22 in an outer peripheral direction, when respectively inserted and fitted into the pipe openings 22a, 22b of the main sewerage pipe 22 and the other main sewerage pipe 22 connected to the manhole 21.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a bypass device using a water stop plug for stopping and repairing a sewer main connecting between manholes.

  When repairing manholes, it was common to block the sewer main that connects the manholes to stop the flow of sewage and pass the bypass pipe.

JP 2005-180569 A

  As this type of water stop plug, there is a plug with a rubber tube arranged on the outer periphery of the connection part. By inflating the rubber tube by injecting air, the rubber tube is pressed against the inner periphery of the sewer main to There was something to ensure the sex. However, in the embodiment in which the rubber tube is inflated as described above, there is a risk of bursting when it is in pressure contact with the inner periphery of the sewer main pipe if the air injection amount is incorrect. Furthermore, in the case of a sewer having a relatively small diameter, the operator often cannot put his hand inside the pipe, and it is difficult to attach the water stop plug.

  The present invention has been made in view of the above problems, and uses a water stop plug that can be easily attached to a pipe of a sewer main and can reliably stop water regardless of the diameter of the pipe of the sewer. Another object of the present invention is to provide a bypass device.

  The invention according to claim 1 of the present invention is a bypass device that closes a sewer main with a water stop plug when repairing a manhole, connects the bypass pipe into the manhole, and allows sewage to pass through. A plug, a water stop plug on the other side, and a bypass pipe. The bypass pipe has pipe ports on both sides attached to one water stop plug and the other water stop plug, respectively. The other water stop plug is pressed from the inner peripheral side of each sewer main to the outer peripheral direction when inserted into and fitted into the respective sewer mains connected to the manhole. It is characterized in that an elastic closing part is arranged.

  The invention according to claim 2 of the present invention is characterized in that the elastic blocking portion is tapered so as to gradually expand as it moves away from the direction in which the water stop plug is inserted into the pipe port of the sewer main.

  The invention described in claim 3 of the present invention is characterized in that the water stop portion is provided with a guide member that contacts the inner peripheral portion of the sewer main pipe at an interval from the elastic blockage portion.

  According to the invention described in claim 1 of the present invention, a water stop plug is inserted into a pipe port of a sewer main pipe connected to a manhole, and the elastic blocking part is deformed into a pipe inner peripheral part and fitted while being pressed. . Thereby, while being able to fit a water stop plug easily to the pipe opening of a sewer main, it can block | close while maintaining high water tightness. In addition, there is no need for secondary labor such as air injection, so that the elastic blocking portion is also provided for the sewer main having a relatively small diameter that is difficult for the operator to enter. Since it can be firmly abutted on and fitted to the inner peripheral portion, the versatility of the water stop plug is enhanced.

  According to invention of Claim 2 among this invention, a water stop plug can be smoothly fitted along the taper to the pipe opening of a sewer main pipe | tube by providing the taper in the elastic obstruction | occlusion part.

  According to invention of Claim 3 among this invention, when a water stop plug is fitted in the pipe opening of a sewer main, a water stop plug is pushed in in a pipe | tube and a guide part is contact | abutted in a pipe | tube. As a result, the water stop plug is arranged almost in parallel with the extending direction of the pipe without inclining, and the water stop plug is firmly fixed in the pipe by the abutment of the guide portion. Occlusion can be stably performed.

It is a longitudinal cross-sectional view which shows the state before inserting the water stop plug by this implementation in the pipe opening of one sewer main which connects to a manhole. (A) is the longitudinal cross-sectional view which looked at the water stop plug by this implementation side view, (b) is the rear view of a water stop plug. (A)-(c) is a longitudinal cross-sectional view which shows the state of an elastic obstruction | occlusion part when a water stop plug is inserted in the pipe opening of one sewer main connected to a manhole. (A) which shows the operation state of a guide part is the rear view which looked at the whole front, (b) (c) is the longitudinal cross-sectional view which looked at the side. (A)-(c) is the simplified longitudinal cross-sectional view which shows the construction procedure of the bypass device of the manhole using the water stop plug by this implementation. It is a longitudinal cross-sectional view which shows other embodiment of the water stop plug of this invention.

Below, the bypass device of the manhole using the water stop plug by this invention is demonstrated based on drawing.
The thing of this implementation is comprised from one water stop plug 1, the other water stop plug 2, and the bypass pipe 3 like FIG.1 and FIG.5 (c). One water stop plug 1 closes the pipe port 22 a of one sewer main 22 connected to the manhole 21, and the other water stop plug 2 is the pipe of the other sewer main 22 connected to the manhole 21. The opening 22b is closed.
Reference numeral 23 denotes a ground opening.

  Since one water stop plug 1 and the other water stop plug 2 are substantially the same, they will be described together. However, as shown in FIGS. 5 and a guide portion 6. Further, the plug body 4 is substantially cylindrical as a whole using iron coated with corrosion resistance and chemical resistance, and an open port 4a on one side of the cylinder is a sewer main 22. The outer opening 4b on the other side of the cylinder has a smaller diameter than the opening 4a on one side. As a result, the plug body 4 is formed into a cylindrical body having a stepped portion having a large diameter on one side and a small diameter on the other side at a substantially central position in the extending direction of the cylinder.

  In the present embodiment, the elastic blocking portion 5 is formed in a ring shape as a whole and is arranged in a state surrounding the outer peripheral portion of the plug body 4. In addition, referring to FIG. 2A, the elastic closing portion 5 is provided with a taper 5a that is inclined so that the outer diameter gradually increases from one side to the other side of the opening of the ring. Further, when the taper 5a is attached to the plug body 4, a gap S is provided on the entire circumference so that it can be easily deformed when pressed from the outer circumference side.

  The guide part 6 is comprised from the receiving part 7 and the volt | bolt 8 like FIG.2 (b) and FIG.4 (a)-(c), and said volt | bolt 8 is screwed from the screw hole 6a of a receiving part. Infest the ceremony. Further, in the present embodiment, the above-described guide portion 6 is provided on the other side of the plug body 4 having a small diameter. Further, the guide portions 6 are arranged at three locations at intervals of approximately 120 °, and can be made to appear and disappear in and out of the plug body 4 independently from each guide portion 6.

  1 and 5C, the bypass pipe 3 is a flexible pipe that can be freely meandered. One bypass port 3a of the bypass pipe 3 is connected to the plug body of one water stop plug 1. The other pipe port 3b of the bypass pipe 3 is attached to the other pipe port of the plug body 4 of the other water stop plug 2. Thus, a route for flowing sewage between one sewer main 22 connected to one water stop plug 1 and the other sewer main 22 connected to the other water stop plug 2 without passing through the manhole 21. Is formed.

In the manhole bypass device using the water stop plugs 1 and 2 constituted by each component as described above, one sewer main 22 and the other sewer main 22 of the manhole 21 are connected as follows. Are attached to the tube ports 22a and 22b.
As a first procedure, as shown in FIG. 5A, one water stop plug 1 is attached and fixed to one pipe port of the bypass pipe 3, and the other pipe port of the bypass pipe 3 is fixed to the other pipe port. Install the water plug 2 and fix it.
As a second procedure, as shown in FIG. 5 (b), one water stop plug 1 is inserted into the pipe port 22 a of one sewer main 22 connected to the manhole 21 and closed. Furthermore, the bolt 8 of each guide part 6 is taken out in the outer peripheral direction and is brought into contact with the inner periphery of the pipe port 22a.
As a third procedure, as shown in FIG. 5 (c), the bypass pipe 3 with the other water stop plug 2 attached to the tip is inserted into the pipe port 22 b of the other sewer main pipe 22 connected to the manhole 21. Block.
By passing through the above first to third procedures, the construction of the bypass device for the manhole 21 using the water stop plugs 1 and 2 according to the present implementation is completed.

The bypass device of the manhole 21 using the water stop plugs 1 and 2 according to the present embodiment constituted by the components described above has the following operations and effects.
Since the elastic blocking portion 5 is disposed on the outer peripheral portion of the plug body 4 of the water stop plugs 1 and 2, the respective pipe ports 22 a of one sewer main 22 and the other sewer main 22 connected to the manhole 21. , 22b, when the water stop plugs 1, 2 are inserted, as shown in FIG. 5C, the elastic blocking portion 5 comes into contact with the inner peripheral portions of the respective pipe ports 22a, 22b. At this time, as the water stop plugs 1 and 2 enter the respective pipe ports 22a and 22b, the outer peripheral portion of the elastic closing portion 5 has a taper 5a, so that the elastic closing portion 5 is elastically closed as shown in FIG. As the outer diameter of the portion 5 increases, it gradually and strongly abuts against the inner peripheral portion of each sewer main 22. From this, the taper 5a of the elastic closing part 5 guides, and the water stop plugs 1 and 2 easily and reliably close the pipe ports 22a and 22b of the one sewer main pipe 22 and the other sewer main pipe 22, respectively. The flow of sewage in the manhole 21 is stopped.

The bypass device of the manhole 21 using the water stop plugs 1 and 2 of the present invention is not limited to the shape of each component shown in the above embodiment as long as it is within the scope described in the claims.
In the above-described embodiment, the elastic closing portion 5 has an outer peripheral portion having a taper 5a. However, as shown in FIG. From this, when the water stop plugs 1 and 2 are inserted into the respective pipe ports 22a and 22b of the one sewer main pipe 22 and the other sewer main pipe 22, the elastic closing portion 5 comes into contact with each other to close the gap. The shape is not limited as long as watertightness can be secured. In the above-described embodiment, the guide portion 6 has been described as a screw type that adjusts the protruding and projecting of the bolt 8 from the receiving portion 7, but as shown in FIG. The pin 18 may be elastically protruded by a force, and the inner peripheral portion of the sewer main 22 may be pressed by the pin 18. For this reason, it is sufficient that the water stop plugs 1 and 2 can be arranged substantially parallel to the extending direction of the sewer main pipe 22 together with the elastic blocking portion 5.

1 One water stop plug (water stop plug)
2 The other water stop plug (water stop plug)
DESCRIPTION OF SYMBOLS 3 Bypass pipe 4 Plug main body 5 Elastic blockage part 5a Taper 5b Earl 6 Guide part 7,17 Receiving part 7a Screw hole 7b Elongate hole 8 Bolt 18 Pin 19 Coil spring 21 Manhole 22 One sewer main, the other sewer main 22a, 22b Pipe port 23 Ground surface opening G Ground S Air gap

Claims (3)

When repairing a manhole, the sewer main is closed with a water stop plug, and the bypass device connects the bypass pipe into the manhole and passes the sewage,
One water stop plug, the other water stop plug, and a bypass pipe are provided, and the bypass pipe has a pipe opening on both sides attached to one water stop plug and the other water stop plug, respectively. When the water stop plug and the other water stop plug are inserted and fitted into the respective sewer mains connected to the manhole and the other sewer mains, they are inserted from the inner peripheral side of each sewer main. A manhole bypass device using a water stop plug, characterized in that an elastic blocking portion that presses in an outer peripheral direction is disposed.   The manhole of the manhole using the water stop plug according to claim 1, wherein the elastic closing portion has a tapered shape that gradually inclines so as to be separated from a direction in which the water stop plug is inserted into the pipe port of the sewer main. Bypass device. The manhole using the water stop plug according to claim 1 or 2, wherein the water stop plug is provided with a guide portion that is in contact with the elastic blockage portion at a distance from an inner peripheral portion of the sewer main. Bypass device.

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