JPH051444A - Blocking method and blocking device for existent pipe line - Google Patents

Abstract

PURPOSE:To facilitate blocking operation and release operation and to improve the working environment. CONSTITUTION:A blocking device constructed so that the section of a cylindrical frame 2 is blocked by a plate piece and stop rings 3 capable of freely swelling and shrinking are externally mounted in the peripheral direction of the cylindrical frame is positioned in a blocking predetermined position in an existent pipe. The stop ring is swollen to block between the cylindrical frame and the peripheral surface of a pipeline.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for closing an existing pipeline, which can safely and easily block the pipelines of various existing pipelines such as water and sewer pipes.

[0002]

2. Description of the Related Art In connection work for pipelines such as small sewer pipes, it is necessary to close the pipelines of existing pipes until the completion of the construction. Conventionally, as means for closing the pipeline of an existing pipe, a method of stacking a large number of sandbags to construct a wall body and a method of constructing a concrete wall body by casting in the field are known. The former blocking method is adopted in a site where the closing period is relatively short and high pressure does not act on the wall, and the latter closing method is used in a site where the closing period is long or high pressure acts on the wall. ing.

[0003]

The above-mentioned conventional closing technique has the following problems. <a> In case of sandbag type, the blocking performance is low, although it takes a lot of time and labor for stacking and removing. <B> When closing with a concrete wall, many steps are required to construct the wall, including formwork assembly, rebar work, concrete placement, and demolding. Furthermore, when removing the wall body, a great deal of labor is required for the chipping work. In addition, in the case of the temporary cutoff of the permanent construction, the worker enters the upstream side of the concrete wall and removes the formwork etc., but the work on the upstream side for the worker bears the risk of gas poisoning and oxygen deficiency accident. Is big. <C> As a problem common to both methods, in the case of an existing pipe with a relatively large flow rate, a drainage facility is installed to drain water and a bypass route is secured by turning around until the wall is constructed. , Etc. must be used together with the double and triple auxiliary construction methods. <D> Another problem common to both methods is that when the pressure on the upstream side of the wall exceeds the proof stress of the wall, the sandbag or the concrete wall may suddenly collapse.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and its object is to close an existing pipeline which can be easily closed and released and can improve the working environment. To provide the technology.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a closing device which closes a cross section of a tubular frame with a plate material and which is covered with a water stop ring that is expandable and contractable along the circumferential direction of the tubular frame is installed at an expected closing position in an existing pipe. The present invention relates to a technique for closing an existing pipeline, which is located at a position where the water stop ring is expanded to close the gap between the tubular frame and the peripheral surface of the pipeline.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

<A> Closing Device FIG. 1 shows a perspective view of the closing device as seen from below, and FIG. 2 shows a vertical sectional view of the closing device arranged in the existing pipe 1. The closing device is composed of a rigid cylindrical frame 2 and an inflatable / contractible water stop ring 3 mounted on the outer peripheral surface of the cylindrical frame 2 at regular intervals.

<B> Cylindrical frame The cylindrical frame 2 has a similar shape to the cross section of the existing pipe 1 and is made of steel. A plurality of idling or self-propelled traveling wheels 21 are attached to the lower portion of the tubular frame 2 so that the traveling wheels 21 can freely move within the existing pipe 1. A contact plate 22 is attached to the outer peripheral surface of the tubular frame 2 to restrict the lateral expansion of the water stop ring 3. A shield plate 23 is attached to the front or the middle of the tubular frame 2.
Since the shield plate 23 is a member intended to shield the inside of the cylindrical frame 2, the installation position and the number of installed sheets are not limited.

<C> Water-stop ring The water-stop ring 3 is an endless hollow structure made of a material having flexibility and water-stop such as rubber and cloth. Water stop ring 3
Is a contact plate 2 attached in the circumferential direction on the outer peripheral surface of the tubular frame 2.
It is installed between 2 and 22. Each water stop ring 3 is a cylinder frame 2
Are arranged at regular intervals in the longitudinal direction of.
A valve 3 for supplying and discharging a fluid such as water or air to each water stop ring 3.
Supply and discharge hose 32 with 1 is connected, and supply and discharge hose 3
By supplying the fluid from 2, the water stop ring 3 expands, and the valve 3
It is configured to contract by the release operation of 1. In addition, as for the connection method of the water supply / drain hose 32, one water supply / drain hose 32 is connected in series to each water stop ring 3 as shown in the figure, or each water stop ring 3 is supplied / discharged independently. The hose 32 shall be connected.

[0010]

Next, a method of shielding the pipeline will be described.

<A> Movement to Closing Position As shown in FIG. 2, the traveling wheels 21 are used to move the closing device to the planned closing position in the existing pipe 1.

<B> Expansion of water stop ring Next, a fluid such as water or air is pressure-fed through the supply / discharge hose 32 to expand each water stop ring 3, thereby expanding the outer peripheral surface of the tubular frame 2 and the existing pipe 1. Stop the water between the inner surfaces. When each water stop ring 3 is sufficiently expanded, the valve 31 is closed to prevent the water stop ring 3 from contracting. Since the inside of the tube frame 2 is closed by the shield plate 23, the pipeline of the existing pipe 1 is reliably shielded by the expansion of the water stop ring 3. A predetermined work is performed on the downstream side of the closing device while the pipe is closed by the closing device. Before starting a predetermined work in the existing pipe 1, it is advisable to sufficiently ventilate the existing pipe 1 and, if necessary, send fresh air from outside the pipe until the end of the work.

<C> Removal When the work in the existing pipe 1 is completed, the valve 31 is opened to contract each water stop ring 3. As a result, a gap is created between the water stop ring 3 and the pipeline of the existing pipe 1, and the sewage or the like whose water level has increased due to the blockage flows downstream from this gap. When the water level in the existing pipe 1 returns to normal, the blocking device is retracted and recovered, or the blocking device is moved to the next blocking position to close the pipeline.

[0014]

[Other Embodiment 1] FIG. 4 shows another embodiment in which the existing pipe 1 is filled with a solidifying material 4 such as mortar to more reliably block the pipe line. The basic structure of the closing device is the same as that of the above-mentioned embodiment. In the present embodiment, the grout discharge hole 5 is provided on the outer peripheral surface of the cylinder frame 2 so that the solidifying material 4 can be discharged from the inside of the cylinder frame 2 to the outside through the grout hose 51. Different from Further, in this embodiment, after the water stop ring 3 is expanded to perform the primary water stop, the tubular frame 2, the pair of water stop rings 3, 3, and the existing pipe 1 are provided.
The solidified material 4 is filled in the doughnut-shaped space partitioned by to perform secondary water stoppage.

[0015]

[Other Embodiment 2] In the above embodiment, the case where the water stop ring 3 is expanded and contracted by using the fluid pressure has been described. One or both of them may be configured to be slidable so that the water stop ring 3 is expanded outward by the pressure of the contact plate 22.

[0016]

Since the present invention is as described above, the following effects can be obtained.

<A> The pipe line can be easily closed only by expanding the water stop ring at an arbitrary position of the existing pipe.

<B> Since a plurality of water blocking rings are arranged in the longitudinal direction of the cylindrical frame, high water blocking can be secured.

<C> Since the conduit can be released only by contracting the water stop ring, the operation of closing the conduit can be easily performed.

<D> Since the operation of closing and opening the pipeline can be performed in a short time without relying on human power, labor saving and working time can be shortened.

<E> Since there is no work on the upstream side of the closed position, the worker can be freed from severe work.

<F> The movement of the closing device and the expansion / contraction operation of the water stop ring are suitable for automatic control, and the construction can be automated.

[Brief description of drawings]

FIG. 1 is a perspective view of a closure device according to the present invention.

FIG. 2 is a cross-sectional view of the closing device before closing.

FIG. 3 is a cross-sectional view of the closing device when closed.

FIG. 4 is a sectional view of another occlusion device.

Claims (4)

[Claims] 1. A blocking device having a tubular frame whose cross section is closed by a plate member and which is covered with a water-stop ring that is expandable and contractable along the circumferential direction of the tube frame is located at a predetermined blocking position in an existing pipe. To close the space between the cylinder frame and the peripheral surface of the pipe,
Method of closing existing pipeline. 2. A closing device having a cross section of a tubular frame closed by a plate member, and a plurality of water stop rings, which are inflatable and defensible at regular intervals along the hand direction, are provided on the outer periphery of the tubular frame. Position it at the planned closing position in the existing pipe, expand the water stop ring to temporarily close the gap between the cylinder frame and the peripheral surface of the pipe, and then fix the gap between the expanded water stop ring and the water stop ring from inside the cylinder frame. A method of closing an existing pipeline by filling it with a binder and closing it secondarily. 3. A tubular frame movable in an existing pipe,
It is composed of hollow water-stop rings attached to the outer peripheral surface of the cylinder frame at regular intervals, the inside of the cylinder frame is closed with a plate material, and a hose for fluid supply is connected to each water-stop ring, and each water-stop ring is connected to the fluid ring. A device that closes existing pipelines that can be expanded and contracted by pressure. 4. A tubular frame movable in an existing pipe,
It is composed of hollow water-stop rings attached to the outer peripheral surface of the cylinder frame at regular intervals, the inside of the cylinder frame is closed with a plate material, and a hose for fluid supply is connected to each water-stop ring, and each water-stop ring is connected to the fluid ring. An apparatus for closing an existing pipeline, which is configured to be expandable / contractible by pressure and has a solid material discharge hole provided on the peripheral surface of a tubular frame excluding the mounting position of a water stop ring.