JP4122283B2 - In-tube contaminant collector - Google Patents

Description

  The present invention relates to an instrument that collects contaminants such as rust and earth and sand flowing through pipes such as water pipes.

  For example, in a water pipe buried in the ground, impurities such as rust generated with aging and earth and sand entering the pipe during repair work may be mixed into the tap water. In order to remove such impurities, the present applicant has proposed a collecting device for in-pipe impurities as shown in FIG.

  In this collecting tool, a collecting net 52 holding a net 53 with an elastically deformable frame 54 is attached to the lower end of a shaft 51, and a repair valve 23 and a three-way mouth pipe 24 are connected to a branch pipe 22 branched from the main pipe 21. When the shaft 51 is inserted into the jig 55 and the shaft 51 is pushed down, the collection net 52 reaches the main pipe 21 and expands. When the shaft 51 is pulled up, The collecting net 52 is reduced and stored in a jig 55.

By using such a collector, it is possible to remove foreign substances without using an existing fire hydrant facility, and without performing extensive excavation work. When the tool is no longer needed, the collecting tool can be easily removed and relocated.
JP 2002-285592 A

  However, in the above-described collecting tool, when the mesh body 53 is clogged and a large load is applied due to the flow, the mesh body 53 is torn and impurities escape to the downstream side as shown in FIG. As shown in FIG. 16, there is a possibility that the broken net 53 is caused to flow downstream.

  Accordingly, an object of the present invention is to prevent the net body from being damaged due to clogging and to prevent adverse effects on the inside of the pipe line.

  In order to solve the above-described problems, in the present invention, in the collecting device for contaminants in a pipe having a collecting net attached to the lower end of the shaft, the collecting net is rotatably connected in the flow direction of the main pipe, and a stopper mechanism is used. The collection network is held in a set state until the load due to the flow reaches the limit value, and when the load exceeds the limit value, the collection network is allowed to rotate downstream and the upstream is prevented from returning to the upstream side. In this way, the frame of the collection network is urged in the reduction direction so that the collection network is reduced with the rotation to the downstream side.

  Further, the stopper mechanism is configured such that a restraining body having a hemispherical head is inserted into the casing so as to be retractable, and the restraining body is biased in a protruding direction by a compression spring. The upper part of the frame abuts, the collection net is held in a set state, and the upper part of the collection net pushes the stopper into the casing so that the rotation of the collection net is allowed.

  Furthermore, a cylinder mechanism having a compression spring is provided in the center of the collection net so as to be directed in the vertical direction so that the reduction of the collection net is assisted with its extension.

  In addition, a flexible cover plate is provided on the outer periphery of the collection net. When the collection net is enlarged, the net is exposed to secure a flow path, and when the collection net is reduced, the net is covered. It was completely covered with a board.

  In the collection tool as described above, when the net of the collection net is clogged and the load due to the flow exceeds the limit value, the collection net rotates downstream, the flow path is opened, and the net Since the load acting on the net is reduced, damage to the net is prevented. Further, at this time, the trapping net is reduced and the contaminants are confined in the mesh body. Therefore, the contaminants do not escape to the downstream side, and there is no adverse effect on the pipeline.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, this collecting tool has a collecting net 2 attached to the lower end of a shaft 1. The collecting net 2 holds a net body 3 with an elastically deformable frame 4. 4 is energized in the reduction direction.

  At the top of the frame 4 is formed a T-shaped head whose upper and lower edges warp outward, and this head is connected to a connecting portion 5 provided at the lower end of the shaft 1 through a shaft 6 so as to be rotatable. Has been. At the lower end of the frame 4, a sliding mechanism 7 having a roller that rotates while contacting the pipe bottom of the water pipe is provided so that the collection net 2 inserted into the water pipe starts to turn smoothly.

  The connecting portion 5 is provided with a stopper mechanism 8. As shown in FIG. 2, the stopper mechanism 8 is configured such that a restraining body 10 having a hemispherical head is inserted into a casing 9 so as to be able to protrude and retract, and the restraining body 10 is urged in a protruding direction by a compression spring 11. It is said that.

  In this stopper mechanism 8, when the rotational moment about the axis 6 acting on the collection net 2 is less than the limit value, as shown in FIG. The upper edge of the head of the frame 4 comes into contact with the outer periphery of the restraining body 10, and the collection net 2 is held in the set state.

  When the moment exceeds the limit value, as shown in FIG. 3B, one of the restraining bodies 10 is pushed into the casing 9 by the head of the collection net 2, and the collection net 2 is swung. Permissible.

  Further, when the collection net 2 swings by a predetermined angle or more, as shown in FIG. 3 (c), the restraining body 10 protrudes to prevent the collection net 2 from returning.

  In addition, as shown in FIG. 4, the stopper mechanism 8 does not make the head of the frame 4 of the collection net 2 T-shaped, and even if the stoppers 10 are arranged on both sides of the rod-shaped frame 4, The function is the same as that shown in FIG.

  In order to remove contaminants in the water pipe using the collecting tool as described above, the repair valve 23 of the branch pipe 22 branched from the main pipe 21 is closed as shown in FIG. Remove the fire hydrant 25 connected to.

  Next, as shown in FIG. 6, a cylindrical jig 12 having the shaft 1 inserted is connected to the upper part of the branch pipe 22. In addition, as shown in FIG. 14, when the three-way port 24 is interposed, it is not necessary to remove the fire hydrant 25.

  Then, as shown in FIG. 7, when the repair valve 23 is opened, the shaft 1 is pushed down, and the roller of the sliding mechanism 7 is pressed against the tube bottom of the main pipe 21, as shown in FIG. It expands to the whole cross section, and the contaminants are collected by the net 3, and the passage of the water flow is allowed.

  In the state where the collection net 2 is set in this way, the handle 13 of the shaft 1 is provided on the upper portion of the jig 12 as shown in FIG. 9 in order to prevent the collection net 2 from returning due to the elasticity of the frame 4. It is good to fix with the movable hook 14.

  In addition, a sealing O-ring 15 is fitted between the shaft 1 and the jig 12 in advance, and a water-stop cap 16 is put on the upper part of the jig 12 in order to increase the water-stopping property when the collection net 2 is set. Also good. At this time, a sealing tape may be interposed between the jig 12 and the water stop cap 16.

  And if time passes in such a state and the clogging arises in the net 3 of the collection net | network 2 as shown in FIG. 10, the water flow in a pipe line will be interrupted | blocked by the net | network 3, and a collection net | network will be shown. 2 is subjected to a load caused by the flow, and a rotational moment about the shaft 6 is generated.

  Thereafter, when the load exceeds a limit value as clogging progresses, the holding by the stopper mechanism 8 is released, and the collection net 2 jumps downstream as shown in FIG. to shrink.

  Thus, when the collection network 2 rotates downstream, the flow path is opened and the load acting on the network body 3 is reduced, so that the network body 3 is prevented from being damaged. Further, at this time, the collection net 2 is reduced and the foreign matter is confined in the net body 3, so that the foreign matter does not escape to the downstream side, and there is no adverse effect on the pipeline.

  If the collection net 2 is not sufficiently reduced only by the elasticity of the frame 4, as shown in FIG. 12, a cylinder mechanism 18 having a compression spring 17 in the center of the collection net 2 is arranged in the vertical direction. It is good to provide for the reduction | restoration of the collection net | network 2 with the extension.

  Further, in order to prevent the foreign matter collected by the collection net 2 from falling again into the pipeline, the outer circumference of the collection net 2 has flexibility such as a rubber plate as shown in FIG. In a state where the cover plate 19 is provided and the collection net 2 is enlarged, the net body 2 is exposed at the center to secure a flow path, and when the collection net 2 is reduced, the net body 3 is completely covered by the cover plate 19. It is also possible that the foreign matter is trapped.

  By the way, providing a means for confirming from the outside that the collection net 2 has jumped up improves the maintainability of the operator during patrol. As the confirmation means, a string is connected to the lower end portion of the frame 4 and the string is inserted into the jig 12 so that the phenomenon that the trapping net 2 jumps up and the string is pulled into the pipe line can be detected from the outside. It is good to.

Schematic perspective view showing the operation of the in-pipe contaminant collector according to the present invention Expanded longitudinal front view of the stopper mechanism (A) Partial front view showing the state of the stopper mechanism of the above when the collection net is set, (b) Partial front view showing the state of the collection network when rotating, (c) Return of the collection net of the same Partial front view showing the prevention state (A) The partial front view which shows the state at the time of the collection net setting in the other example of the stopper mechanism same as the above, (b) The partial front view which shows the state at the time of rotation of the collection net same as the above, (c) The collection same as the above. Partial front view showing the return prevention state of the net Longitudinal side view showing the mounting condition of the fire hydrant before setting the collector Longitudinal side view showing the mounting state of the jig for inserting the collector Vertical side view showing the collector insertion process (A) Longitudinal side view showing the set state of the collection net of the above, (b) Longitudinal front view of the pipe portion of the above. (A) Expanded sectional view showing the shaft fixing hook and the water stop cap same as above, (b) Side view of the hook same as the above. (A) Longitudinal side view showing a state in which clogging has occurred in the collection net of the above, (b) Longitudinal front view of the pipe portion of the above. (A) Longitudinal side view showing a state in which the same collection network is rotated downstream, (b) Longitudinal front view of the duct portion. (A) Longitudinal front view showing an enlarged state of a collection net provided with the above-described reduction assisting cylinder mechanism, (b) Longitudinal front view showing a reduced state of the above. (A) Longitudinal front view showing an enlarged state of the collection net provided with the same cover plate, (b) Longitudinal front view showing a reduced state of the above. Longitudinal side view showing the state of use of a conventional dust collector Longitudinal side view showing a state in which the same mesh body is torn Longitudinal side view showing a state in which the same mesh body is broken

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft 2 Collection net 3 Net body 4 Frame 5 Connection part 6 Shaft 7 Sliding mechanism 8 Stopper mechanism 9 Casing 10 Stopper 11 Compression spring 12 Jig 13 Handle 14 Hook 15 O-ring 16 Water stop cap 17 Compression spring 18 Cylinder mechanism 19 Cover plate 21 Main pipe 22 Branch pipe 23 Repair valve 24 Three-way port 25 Fire hydrant

Claims (4)

  Attach a collection net to the lower end of the shaft that is inserted into the branch pipe branched from the main pipe, and when the shaft is pushed down, the collection tool for in-pipe contaminants that the collection net reaches the main pipe and expands, The collection net is connected to a shaft so as to be rotatable in the flow direction of the main pipe, and a stopper mechanism holds the collection net in a set state until the load due to the flow reaches a limit value, and the load exceeds the limit value. And allowing the collection network to rotate downstream, preventing the return to the upstream side, and energizing the collection network frame in the shrinking direction so that the collection network rotates downstream. In-pipe contaminant collector characterized by being reduced in size.   The stopper mechanism is configured such that a restraining body having a hemispherical head is inserted into the casing so as to be able to protrude and retract, and the restraining body is urged in a protruding direction by a compression spring. The upper part abuts, the collection net is held in a set state, and the upper part of the frame of the collection net pushes the restraining body into the casing so that rotation of the collection net is allowed. Item 1. A dust collecting tool according to item 1.   3. A cylinder mechanism having a compression spring provided in a central portion of the collection net is provided in a vertical direction so that the reduction of the collection net is assisted with the extension thereof. A collecting device for in-pipe impurities as described in 1.   A flexible cover plate is provided on the outer periphery of the collection net.When the collection net is enlarged, the net body is exposed to secure a flow path, and when the collection net is reduced, the net body is a cover plate. The in-pipe contaminant collecting device according to any one of claims 1 to 3, wherein the device is completely covered.

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