JP4349948B2 - In-pipe contaminant collection device - Google Patents

Description

The present invention relates to an apparatus for collecting foreign substances such as earth and sand and rust mixed in a pipe of a water pipe .

  For example, in water pipes buried in the ground, impurities such as earth and sand may be mixed with repair work. In order to discharge the contaminants, generally, as shown in FIG. 5, a method is adopted in which the fire hydrant 53 connected to the branch pipe 52 rising from the main pipe 51 of the water pipe is opened and the impurities are pushed out together with the tap water. ing.

  According to this method, the low-specific gravity contaminants 54 that float inside the main pipe 51 can be discharged from the fire hydrant 53 relatively easily. However, in a large-diameter pipe or the like where the flow velocity is difficult to obtain, In some cases, impurities 55 having a large specific gravity such as gravel accumulate on the bottom of the main pipe 51 and are not discharged from the fire hydrant 53.

For this reason, the present applicant has proposed an expandable / contractible discharge tool 56 in which a bag body 58 is attached to an umbrella-shaped frame 57 as shown in FIG. When the discharge device 56 is inserted into the main pipe 51 from the branch pipe in a contracted state, the discharge tool 56 expands in the main pipe 51 so that a gap is formed between the inner peripheral surface of the pipe line and the bag body 58. In this gap, the flow rate is increased and the contaminant 55 having a large specific gravity is transferred to the downstream side.
JP 2003-1210 A

  By the way, if the discharging tool as described above is used, it is possible to transfer a high specific gravity contaminant to the vicinity of the branch portion of the branch pipe, but in order to remove the foreign substance from the main pipe, it is connected to the branch pipe. The fire hydrant must be opened and pushed out together with the water flow, and a general flanged T-shaped tube with a branch port at the top of the tube may not provide a sufficient effect of discharging impurities.

  As a countermeasure, a large-scale construction is required to install a spiral-shaped flanged T-tube or strainer that branches off from the bottom of the tube. Although it has been considered to insert a cylindrical instrument from a branch pipe to discharge impurities, there is a problem that it takes time to install and operate such an instrument.

  Therefore, the present invention is intended to provide means for reliably discharging the foreign matter accumulated on the bottom of the tube by a simple operation.

  In order to solve the above-described problems, the present invention is configured such that when the obturator and the collecting tool are sequentially connected to the winding device via a flexible wire, and the obturator and the collecting tool are inserted into the conduit, The pipe cross section is partially closed so that a gap remains, the collector is positioned downstream from the obturator, the opening surface faces upstream, and the wire is wound by a winding device installed outside the pipe. If it takes, the obstruction | occlusion tool and the collection tool will move the pipe line upstream, and decided to provide the collection apparatus of the in-pipe impurities.

  In such a collecting device, the flow velocity in the pipe is increased in the gap portion by the obturator inserted in the pipeline, and the foreign matter is wound up in the direction of the collecting tool, along with the winding of the wire by the winding device, The foreign matter captured by the collecting tool is removed outside the pipe.

  In addition, if the obturator and the collecting tool can be expanded and contracted, and inserted into the conduit in the contracted state and expanded in the pipe, the obturator and the collecting tool can be inserted into the main pipe even from a thin branch pipe. .

  In this case, as the obturator, it is preferable to use an elastic frame in which a sheet material that obstructs the pipe is stretched.

  Moreover, as the said collection tool, it is good to use what extended the flexible net | network body to the flame | frame which has elasticity.

  In the above-mentioned in-pipe contaminant collector, the obturator and the collector can be inserted into the pipe line through the existing branch pipe, so there is no need for road surface excavation work, etc. Because it is rolled up and captured with a collector, it is possible to capture contaminants with a large specific gravity without installing an insertion-type discharge device. Since the impurities trapped in the tool are removed, it is not necessary to drain a large amount in accordance with the cleaning work.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the in-pipe contaminant collection device is configured such that the obturator 1 and the collection device 2 are sequentially connected to a winding device 4 via a flexible wire 3.

  The obturator 1 is formed by combining an elastic arcuate bone member to form an elliptical frame 5, and a flexible sheet material 6 that blocks water flow is stretched on one side of the frame 5. Has been. Ni-Ti alloy, stainless steel strip or the like is used for the bone member of the frame 5, and polyester fabric such as sail cloth, nylon fabric or the like is used for the sheet material 6.

  In addition, if the branch pipe etc. which insert the obturator 1 into a main pipe have dimensional allowance, in order to stabilize the obstruction | occlusion performance of a pipe line, the obturator 1 is a tube which a trunk | drum extends long in the water flow direction in the main pipe. A closed structure may be used, and a fluid may be separately sent to the inside of the structure by a hose or the like to be expanded or contracted.

  Further, in the collecting tool 2, a flexible net body 8 that secures water permeability of the flow path is stretched on one side portion of the frame 7 similar to the frame 5 of the obturator 1. For the net body 8, a plankton net of nylon or polyethylene is used, and the size of the net is appropriately selected according to the particle size of the impurities to be collected. The net body 8 may be provided with a check valve-like structure so that the foreign matter once collected does not flow out.

  In addition, the wire 3 is made of stainless steel wire, polyethylene line, or the like having a strength capable of withstanding the winding load of the winding device 4, and the winding device 4 closes the collecting tool 2 that has captured foreign substances. An electric winch with an output wound together with the tool 1 or a manual winch without power is used.

  When the water pipe is cleaned using the collecting device as described above, the obturator 1 and the collecting tool 2 are contracted and closed through the branch pipe 52 as shown in FIG. Insert into tube 51. When the obturator 1 and the collecting tool 2 reach the main pipe 51, they expand into an elliptical shape.

  In this state, the closing tool 1 and the collecting tool 2 are sent to the downstream side using the flow in the pipe while feeding the wire 3 from the winding device 4 installed outside the main pipe 51. At this time, there is a possibility that the contaminant 55 at the bottom of the tube is rolled up, but the contaminant 55 is collected in a later step, so there is no problem.

  When the obturator 1 and the collector 2 are thus inserted into the main pipe 51, the obturator 1 partially obstructs the flow path cross section of the main pipe 51 so that a gap remains, and the collector 2 is obstructed by the obturator 1. Located on the downstream side, the opening surface faces the upstream side.

  Next, as shown in FIG. 3, when the wire rod 3 is wound up by the winding device 4, the obturator 1 and the collecting device 2 are moved backward in the direction of the water flow in the pipe and pulled upstream, the obturator 1 floats and sinks. While moving, the flow velocity increases in the gap in the cross section of the flow path, and the accumulated contaminants 55 are rolled up in the direction of the collecting tool 1 and sequentially captured by the collecting tool 2.

  At this time, if the obturator 1 is held in a floating state so that a gap is always generated at the bottom of the tube, the effect of raising the contaminant 55 at the bottom of the tube is improved, and the contaminant 55 is efficiently captured. Can be collected.

  Then, as shown in FIG. 4, when the obturator 1 and the collector 2 reach the vicinity of the branch pipe 52 through which the wire 3 is inserted, the flow of the main pipe 51 is stopped, and the obturator 1 and the collector 2 are When it is passively shrunk and taken out from the branch pipe 52, the contaminant 55 captured by the collector 2 can be removed.

  In the in-pipe contaminant collection tool as described above, the obturator 1 and the catch 2 can be inserted into the main pipe 51 via the existing branch pipe 52. There is no need to perform road excavation work or the like, as in the case of installation, and there is no cost.

  Further, since the flow velocity at the bottom of the tube is increased by the obturator 1 and the foreign matter is rolled up and captured by the collecting device 2, it does not move in the normal flow in the tube without installing an insertion type discharge device. Therefore, it is possible to capture impurities 55 having a large specific gravity, and to efficiently clean the inside of the pipe.

  Further, along with the winding of the wire 3 by the winding device 4, the collector 2 is pulled from the downstream side to the upstream side, pulled out to the outside of the main pipe 51, and impurities captured by the collector 2 are removed. As a result, wastewater associated with the cleaning operation is suppressed, and waste of water resources is prevented.

The figure which shows the outline of the in-tube contaminant collection apparatus which concerns on this invention Sectional view showing the process of insertion into the main pipe Sectional view showing the process of collecting foreign substances Sectional view showing the removal process from the main Sectional drawing which shows the contaminant removal method from the conventional fire hydrant Sectional drawing which shows the transfer process of the foreign material by the conventional discharge tool

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Obturator 2 Collecting tool 3 Wire rod 4 Winding device 5 Frame 6 Sheet material 7 Frame 8 Net body 51 Main pipe 52 Branch pipe 55 Contaminant

Claims (4)

In a device that collects contaminants mixed in a water pipe, when the obturator and the collector are sequentially connected to the winding device via a flexible wire, and the obturator and the collector are inserted into the duct The winding device is installed outside the pipe, with the obturator partially obstructing the pipe cross section so that a gap remains, the collector is located downstream from the obturator, and the opening surface faces upstream. When the wire rod is wound up in the gap, the obturator and the collecting tool are moved to the upstream side and drawn out to the outside while trapping the foreign matter wound up by the water flow having an increased flow velocity in the gap with the collecting tool. An in-pipe contaminant collection device.   2. The apparatus for collecting contaminants in a pipe according to claim 1, wherein the obturator and the collection tool are expandable / contractable, inserted into the conduit in a contracted state, and expanded in the pipe.   The apparatus for collecting contaminants in a pipe according to claim 1 or 2, wherein as the obturator, an elastic frame is used in which a sheet material for closing a pipe line is stretched.   The in-pipe contaminant collection device according to any one of claims 1 to 3, wherein the collection tool is a frame having elasticity and a flexible net member stretched.

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