JP2009108885A - In-pipe stagnant water removal device, and in-pipe stagnant water removal method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform in-pipe stagnant water removing work in an active pipe state, to enable stagnant water collecting at lower part side of a pipe to be drained and removed out of the pipe completely while preventing in-pipe gas discharge to the outside, and furthermore to finish the stagnant water removing work quickly by opening a plurality of water inlets even when the level of the stagnant water collecting in a tube is significantly high. <P>SOLUTION: Water inlet member 2a of a water inlet part 2 mounted on a water suction hose 1 so as to be rotated around axis along the axial center line of the water suction hose 1 includes: a water suction hole 9 communicated with the water suction hose 1; first water inlets 10 and second water inlets 11 each communicated with the water suction hole 9 at several portions on the circumference; and a weight part 12, which is heavier than the other part of the circumference and is disposed on a part of the circumference where the first water inlet 10 is opened. Each second water inlet 11 includes an opening and closing mechanism 30, which is configured to open the inlet when the water level WL of stagnant water W in a pipe is higher than that of the second water inlet 11 and to close the inlet at least when the water level is lower than that of the second water inlet 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an in-pipe water removal device used for discharging and removing stagnant water accumulated in a pipe of a laid pipe such as a gas pipe laid underground, and in-pipe water removal using the same. In particular, the present invention relates to an in-pipe water removal apparatus and an in-pipe water removal method that can work in an active pipe state and can efficiently remove the in-pipe water without discharging the in-pipe fluid to the outside of the pipe.

  For example, in the pipes of laid pipes such as gas pipes that are laid underground, water is generated due to intrusion from damaged parts of the pipes and joints that have deteriorated airtightness. Therefore, it is necessary to find such a stagnant place and remove the stagnant water outside the pipe. When removing the stagnant water in the pipeline, it has been practiced to find the stagnant location with a camera in the pipe, open both ends, and discharge the stagnant water from the open end by suction or air pressure supply. Then, since it is necessary to interrupt the gas flow in the pipe line, the work becomes large, and there is a problem that the gas cannot be supplied to the downstream side of the work place for a long time.

  In order to avoid this problem, a water absorption hose is inserted into the pipe from one side opening such as a branch hole in the pipe, and suction is performed after the water absorption port at the tip of the water absorption hose reaches the water stagnant part in the pipe. An apparatus or a construction method for starting and removing the stagnant water in the pipe through the water absorption hose has been proposed.

  For example, the one described in Patent Document 1 below is a sampling header in a sampling hose inserted into a underground low-pressure gas conduit and a device for sucking and discharging stagnant water through a sampling header attached to the tip of the sampling hose. A tubular neck that can be bent by the weight of the sampling header is provided between the sampling hose and the sampling hose. A water-absorbing metal fitting having a center of gravity at a lower position and having a water-absorbing port at the lower weight portion is provided.

Moreover, the thing of the following patent document 2 is an apparatus which attached the water extraction apparatus which attached the in-pipe camera to the front end side at the front-end | tip of a flexible water extraction hose, Comprising: A water extraction apparatus is inside a cylindrical water extraction part. A cylindrical member formed in a weight portion where a part of the circumference is opened as a water inlet and the vicinity of the water inlet is heavier than the other part is arranged around the axis along the axis of the cylindrical water extraction part. It has a structure that is pivotally supported by the shaft.
Japanese Utility Model Publication No. 62-202595 JP-A-8-303697

  The work to remove stagnant water in the pipeline for the purpose of gas transportation is because the gas will not be supplied to the downstream side of the work location if the gas flow is cut off, so the active pipe state ensuring gas flow It is desirable to do in. Even in the operation of removing the in-pipe water due to the damage of the gas pipe at the time of a disaster, if the in-pipe water removal operation can be performed in the active gas state after first ensuring gas circulation by ensuring the airtightness of the pipeline, it is one of the lifelines. It is possible to quickly restore the gas supply line at the time of a disaster.

  However, if the in-pipe gas is sucked and discharged during the operation of removing the stagnant water in the live pipe state, the pressure in the pipe necessary for the gas flow decreases, and the gas supply to the downstream side becomes unstable. There's a problem. Further, when the pipe gas is released to the outside during the pipe stagnant water removal operation, depending on the type of the gas, the surrounding environment may be deteriorated and the safety of the operator may be hindered.

  On the other hand, the above-described conventional technology has been devised so that the water inlet is always directed downward due to gravity, thereby preventing the gas in the pipe from being sucked from the water inlet, and the water remaining in the pipe. Can be completely eliminated until the end, so that it is possible to remove the stagnant water in the live pipe state and to eliminate the above-mentioned problems.

  However, in the above-described prior art, the water intake port for sucking the stagnant water accumulated in the pipe with a suction force is always provided only in one downward direction, so that, for example, gas can be distributed to the upper side in the pipe If water stays up to a fairly high level in the pipe while leaving a clear space, it will take a long time to completely remove the stagnant water from a single water intake that always opens downward. Problem arises.

  The present invention has been proposed to deal with such a situation. That is, it is possible to remove the stagnant water in the live pipe state, and at that time, drain the remaining stagnant water in the lower part of the pipe to the outside while avoiding the external release of the gas in the pipe. Further, it is an object of the present invention that, even when the water level in the pipe is considerably high, the water removal operation can be completed quickly.

  In order to solve the above-mentioned problem, the present invention comprises a water absorption hose that can be inserted from a side opening of a pipe line, and a water absorption port portion that is attached to the tip end side of the water absorption hose. An apparatus for removing stagnant water in a pipe that sucks into a water absorption hose from a water inlet provided in a section and removes drainage to the outside of the pipe via the water suction hose, wherein the water inlet is always open downward. The water inlet and the first opening are provided with a second water inlet formed in a different direction, and the second water inlet has the second water inlet at a position lower than the water level in the pipe. An opening / closing mechanism is provided that opens when there is, and closes at least when the second water inlet is at a position higher than the water level in the pipe.

  Further, the present invention uses an in-pipe water removal device provided with a water absorption hose that can be inserted from a side opening of a pipe line, and a water absorption port attached to the tip side of the water absorption hose. A method for removing stagnant water in a pipe that sucks into a water absorption hose from a water inlet provided in a water inlet, and drains the water out of the pipe via the water absorption hose, from the side opening of the pipe in an active pipe state. A water inlet and a water absorption hose are inserted, and after the water inlet reaches the in-pipe water location, a first water inlet provided at the water inlet and always open downward is formed upward. When both the water inlets are at a position lower than the water level, the second water inlet is opened to absorb water from both the first water inlet and the second water inlet, at least When the second water inlet is at a position higher than the stagnant water level, the second water inlet It closed, and performs water only from the first water inlet.

  According to such a feature, a water absorption hose provided with a water inlet at the tip is inserted from a side opening such as a branch opening formed in a pipe in a live pipe state, and the water remaining in the pipe is discharged from the water inlet of the water inlet. It can be sucked and drained out of the pipe through a water absorption hose. At that time, the first water inlet provided in the water inlet is always open downward regardless of the rotation of the water inlet around the tube axis, so that the water inlet is aligned with the bottom of the pipe. If suction is performed after the first water intake port becomes lower than the water level in the pipe, the water can be absorbed only from the first water intake port. Never inhale. The second water inlet provided in the water inlet opens when the second water inlet is located at a position lower than the water level in the pipe, and at least the second water inlet is higher than the water level in the pipe. Since it is equipped with an opening and closing mechanism that closes when it is at a high position, if the water level in the pipe is higher than the second water inlet, the first water inlet is not sucked into the pipe without sucking the gas in the pipe. In addition, in-pipe water can be sucked also from the second water inlet, and when the water level in the pipe falls, the second water inlet can be closed and water can be absorbed from the first water inlet. it can.

  Thus, for example, in a gas pipe in an active gas state, when stagnant water is accumulated in the pipe at a high water level, leaving a space for gas to flow on the upper side in the pipe, the first water inlet that always opens downward is provided. Including water can be sucked from a plurality of water inlets and drained out of the pipe. And when the water level falls to the lower part (bottom part) side in a pipe | tube, a stagnant water can be drained and removed from the 1st water inlet currently always opened downward to the end. At this time, since the second water inlet is closed by the opening / closing mechanism, the gas is not sucked.

  As described above, according to the present invention, in-tube stagnant water removal work can be performed in an active pipe state, and at that time, stagnant water accumulated on the lower side in the pipe can be removed from the outside of the pipe while avoiding external discharge of the in-pipe gas. The drainage can be removed to the end, and even if the water level in the pipe is considerably high, the water removal operation can be completed quickly by opening a plurality of water inlets. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a schematic diagram illustrating an overall configuration of the in-pipe water removal device according to the present embodiment and a working state of the in-pipe water removal method according to the embodiment of the present invention.

  As shown in FIG. 1, an in-pipe water removal device A according to an embodiment of the present invention includes, for example, a water absorption hose 1 inserted into a pipe of a pipe line B such as a gas conduit laid in the ground, The water absorption hose 1 is provided with at least a water absorption port 2 attached to the tip side. And in order to perform water absorption operation | movement, the suction device 3 provided with the suction | attraction force generation | occurrence | production means which generate | occur | produces suction force in the water absorption hose 1, and the water storage tank which stores the water drained through the water absorption hose 1, and a water intake port A camera head 4 a is provided at the distal end side of the section 2, and a camera cable 4 b connected to the camera head 4 a is provided with a tube endoscope camera 4 inserted into the water absorption hose 1. Further, as shown in FIG. 1, the in-pipe water removal apparatus A is photographed by a take-up reel 5 for taking out and inserting the water absorption hose 1 into the pipe of the pipe B and taking up and collecting it from the pipe, and a pipe endoscope camera 4. It is possible to attach a monitor device 6 that displays the state of the pipe inside.

  The water absorption hose 1 has an outer diameter that can be inserted from the side opening B1 of the pipe B, and is formed to be flexible with an appropriate material such as polyethylene resin. The suction force generating means in the suction device 3 is driven by an engine as an internal combustion engine and the engine as described in, for example, Japanese Patent Laid-Open Nos. 10-153199 and 11-13631. A compressor is used, and an ejector for generating a suction force in the water absorption hose 1 by the air discharged from the compressor is provided. The tube endoscope camera 4 includes, for example, a camera head 4a in which an optical system, illumination, and an image sensor are built in coaxially on the distal end side of the water suction port 2, and a camera cable 4b connected to the camera head 4a includes: A water inlet member 2 a, which will be described later, passes through the water inlet 2, and is provided over the entire length of the water absorbing hose 1.

  The structure of the water inlet part which concerns on 1st Embodiment is demonstrated based on FIG. 2 and FIG. Here, description will be made with reference to FIG. FIG. 2 is an enlarged vertical side view showing the water suction port portion according to the first embodiment, and FIG. 3 is a sectional view taken along line XX of FIG.

  As shown in FIGS. 2 and 3, the water suction port 2 includes a water suction port member 2 a and an outer shell for pivotally supporting the water suction port member 2 a around an axis along the axis of the water suction hose 1. And a member 2b.

  The water inlet member 2 a is formed in a substantially cylindrical shape having a water absorption hole 9 communicating with the water absorption hose 1 in the axial direction. The water inlet member 2a is provided with a first water inlet 10 and a second water inlet 11 at several locations on the circumference (two locations opposite to each other in an axial symmetry in the figure), and one first A weight portion 12 that is heavier than the other circumferential portions is provided in a part of the circumference where the water inlet 10 is opened. Here, each of the first water inlet 10 and the second water inlet 11 is a single water inlet. However, the first water inlet 10 and the second water inlet 11 are not limited to this.

  As shown in FIG. 3, the weight portion 12 in which the first water inlet 10 is opened is substantially half the size along the circumferential inner surface of the outer member 2 b from a position lower than the axis of the water inlet member 2 a. It is formed in a circular shape. Moreover, as shown in FIG. 2, the weight part 12 is formed in a size corresponding to the axial length of the water inlet member 2a as required. Thereby, when the water inlet 2 is inserted into the pipe of the pipe B, the water inlet 10 is always opened downward so as to face the lower (bottom) side of the pipe by the weight of the weight 12. As described above, the water inlet 2 includes the first water inlet 10 that always opens downward even when the water inlet 2 rotates in the tube axis direction.

  And it is formed in the direction different from the 1st water inlet 10, The opening-and-closing mechanism 30 is provided in the 2nd water inlet 11 currently formed upwards here. The opening / closing mechanism 30 opens the second water inlet 11 when the second water inlet 11 is lower than the water level WL of the in-pipe water W, and at least the second water inlet 11 is in the in-pipe water W. When the water level is higher than the water level WL, a mechanism for closing the second water inlet 11 is provided. That is, the opening / closing mechanism 30 has an action of opening / closing the second water inlet 11 according to the vertical displacement of the water level WL. In this embodiment, as shown in FIGS. 2 and 3, the opening / closing mechanism 30 includes a ball-shaped valve body 13 and a valve portion 14 formed at the opening edge of the second water inlet 11. Yes.

  As shown in FIG. 1 and FIG. 4 to be described later, the valve body 13 has a second water absorption when the stagnant water W is accumulated in a high water level state, leaving a space M in which the gas can flow in the upper part of the pipe. When the water level WL falls below the second water intake port 11 and rests on the valve unit 14, the valve unit 14 is in close contact with the specific gravity. A ball shape that is one size larger than the diameter of the second water suction port 11 is formed by using a material that is capable of closing the opening of the valve portion 14. During the water absorption operation, a suction force acts on the second water inlet 11, so even if the valve body 13 is formed of a material having a low specific gravity, the valve body 13 can be used as long as the valve body 14 can be adhered. It is possible to close the second water inlet 11.

  Further, as shown in FIGS. 2 and 3, the second water inlet 11 is provided with a guide body 15 formed in an upward trumpet shape, and the valve body 13 is an opening of the second water inlet 11. It moves up and down (floats) upward, and is guided so as to be accommodated in the valve portion 13 when the valve body 13 is lowered. As shown in FIGS. 2 and 3, the guide body 15 is made of a water-permeable material such as a mesh material. The upper end opening edge that is attached by the means and opens upward in a trumpet shape is formed along the circumferential surface of the outer member 2b.

  In addition, although illustration is abbreviate | omitted, the guide body 15 opened only the lower end side attached to the 2nd water inlet 11, and closed the upward opening part side along the circumferential inner surface of the outer shell member 2b. It can be formed in a bowl shape.

  The valve portion 14 is inclined inward at an appropriate angle so that the spherical surface of the valve body 13 is in close contact (close contact) with an appropriate contact area when the valve body 13 is placed on the opening edge of the water inlet 11. It is formed in a shape. As a result, when the water level WL of the in-pipe water W drops from the state shown in FIG. 4A to the state shown in FIG. The water inlet 11 is closed in a sealed state. That is, even if the drainage of the stagnant water W from the first water inlet 10 to the outside of the pipe is continued, the gas in the pipe is prevented from being sucked from the second water inlet 11.

  As shown in FIGS. 2 and 3, the outer member 2b pivotally supports both ends in the axial direction of the water inlet member 2a via a bearing 8, and the axial length of the water inlet member 2a. It has a length corresponding to the length, and has an inner diameter that can surround the guide body 15 attached to the weight portion 12 and the second water inlet 11 of the water inlet member 2a. The outer shell member 2b communicates with one of the axial core portions of the closed circular wall portion 16 in the front and rear direction in the axial direction and the water absorption hole 9 of the water inlet member 2a. A connecting port portion 17 to be attached is provided, and an insertion hole 18 for inserting the camera cable 4b of the tube endoscope camera 4 is provided in the other axial core portion.

  2 and 3, the outer member 2b includes a holding portion 19 for fixing the bearing 8 to the inner side surface around the axis of the front and rear circular wall portions 16, and further contains the stagnant water W therein. Water passage holes 20 that are elongated in the axial direction to allow water to flow through are formed at equal intervals in the circumferential direction of the outer wall portion 21.

  A first water inlet opening in the weight portion 12 by pivotally supporting the water inlet member 2a via a bearing 8 around an axis along the axis of the outer shell member 2b attached to the water absorbing hose 1. 10 always opens downward facing the lower (bottom) side of the tube. The stagnant water W accumulated in the pipe is passed (inflowed) into the outer member 2b through the water passage hole 20, and sucked from the first water inlet 10 and the second water inlet 11 of the water inlet member 2a. It is sucked into the water absorption hose 1 from the water absorption hole 9.

  Next, the working method (pipe water removal construction method) by the pipe drainage apparatus A according to the present embodiment configured as described above will be described. Here, FIG. 4 is a longitudinal sectional view of the main part showing the state in which the water inlet 2 has reached the in-pipe water-stagnation location, and FIG. (B) shows the state when the water level has fallen to the lower side in the pipe. Here, description will be made with reference to FIG. 1 as appropriate.

  First, as shown in FIG. 1, after excavating a shaft C having a depth from the ground surface GL to the ground where the pipe B is laid, the water absorption hose 1 is inserted into the pipe of the pipe B in a no-blow state. The insertion member D is attached to the pipe B, and the water absorption port 2 and the water absorption hose 1 including the camera head 4a are inserted into the pipe B through the side opening B1 of the pipe B through the insertion member D. Let me go. The side opening B1 may be a branch opening formed in the pipe B in advance, or may be a newly perforated hole. At this time, the presence or absence of stagnant water W accumulated in the pipe is confirmed while viewing the in-pipe image projected on the pipe endoscope camera 4 on the monitor 6, and when the stagnant place is found, as shown in FIGS. The part 2 is made to reach the water-stagnation location where the water-stagnation W is accumulated. Here, it is preferable that the bottom of the outer shell member 2b is in contact with the inner bottom of the pipe, for example, by increasing the overall weight of the water suction port 2.

  In this way, after the water absorption hose 1 is inserted into the pipe and the water suction port 2 reaches the water stagnant location in the pipe, the water level WL of the stagnant water W exceeds the water suction port 2, and FIG. As shown in FIG. 5, when the pipe stagnant water W is accumulated at a high water level, leaving a space M through which the pipe gas circulates on the upper side in the pipe, it is always directed toward the lower side in the pipe due to the weight of the weight portion 12. The second water inlet 11 formed upward with respect to the first water inlet 10 opening downward is in a state in which the valve body 13 is detached from the valve portion 14 of the second water inlet 11 by buoyancy. Will open. As a result, the water absorption hose 1 is absorbed while the stagnant water W is sucked from both the first water inlet 10 and the second water inlet 11 located above and below, as indicated by arrows P1 and P2 in FIG. The drainage is removed to the outside of the pipe.

  Then, as shown in FIG. 4 (b), when the water level WL of the pipe stagnant water W is lowered to the extent that the upper portion of the water inlet 2 is exposed from the water surface WL, the valve body 13 is connected to the second water inlet 11. It sits on the valve part 14 (sits down), and the second water inlet 11 is thereby closed. In this state, the gas in the pipe is not sucked from the second water suction port 11, and the first water absorption is always kept in the downward opening state by the weight portion 12 until the stagnant water W is completely extracted and removed. The suction from the mouth 10 is continued, and all the stagnant water W is drained out of the pipe.

  Thus, according to the in-pipe water removal device A according to this embodiment, when the stagnant water W is accumulated in the pipe in a high water level state, leaving the space M in which the pipe gas flows on the upper side in the pipe, The stagnant water W can be drained and removed from both the first water inlet 10 that always opens downward and the second water inlet 11 that opens upward.

  When the water level WL of the stagnant water W is lowered to the lower (bottom) side in the pipe, the second water intake port 11 is closed (sealed) so as not to pass the gas in the pipe, and the weight portion The operation of draining and removing the stagnant water W from the first water inlet 10 opened at 12 to the end is continued.

  Thereby, even when the stagnant water removal operation is performed in a live pipe state, the in-pipe water W accumulated in a high water level state can be efficiently collected in a short time without discharging the pipe gas outside the pipe, and It can be discharged out of the tube until the end.

  Next, the structure of the water inlet port according to the second embodiment will be described with reference to FIG. Here, description will be made with reference to FIG. 4 as appropriate. FIG. 5 is an enlarged vertical cross-sectional view of the water suction port portion according to the second embodiment. The water inlet 2-1 according to the second embodiment is different from the configuration of the opening / closing mechanism 30 for opening and closing the second water inlet 11 in accordance with the vertical displacement of the water level WL of the stagnant water W. Since the components are basically the same as those in the first embodiment, the same components are denoted by the same reference numerals, and the description of the common parts is omitted.

  That is, the opening / closing mechanism 30 for opening and closing the second water inlet 11 in accordance with the vertical displacement of the water level WL includes a valve portion 22 formed inside the second water inlet 11 as shown in FIG. The ball-shaped valve element 23 and a floating ball 24 that separates the valve element 23 from the valve part 22 are configured.

  As shown in FIG. 5, the valve portion 22 is formed in a ring shape (trumpet shape) that is inclined downward from the inner peripheral surface of the second water inlet 11 toward the axial direction. Thereby, when the water level WL of the stagnant water W drops from the state shown in FIG. 4A to the state shown in FIG. 4B, the valve body 23 is placed on the valve portion 22, whereby the second water inlet 11 is closed in a completely sealed state.

  The valve body 23 has a spherical diameter that is considerably smaller than the diameter of the second water inlet 11 by using an appropriate material that can obtain adhesion (sealability) with the valve section 14 when placed on the valve section 14. It is formed in a ball shape. Specifically, as shown by a two-dot chain line in FIG. 5, when the ball is separated from the valve seat 22 by the floating ball 24 and floats, it is trapped between the inner peripheral surface of the second water inlet 11. It is formed with a spherical diameter to the extent that a gap N for water W to pass through is ensured.

  The floating ball 24 is formed in an appropriate size using an appropriate material having a buoyancy that lifts the valve body 23 away from the valve portion 22. The floating ball 24 is connected to the valve body 23 by a flexible wire, a chain and other connecting members 25.

  Further, in order to confine the valve body 23 inside the second water inlet 11 at the opening of the second water inlet 11, a substantially cruciform or radial closing frame 26 is formed in a plan view. An insertion hole 27 is provided in the axial center of 26. Thereby, the valve body 23 and the floating ball 24 are connected by the connecting member 25 through the insertion hole 27.

  Next, the structure of the water inlet port according to the third embodiment will be described with reference to FIG. Here, description will be made with reference to FIG. 4 as appropriate. FIG. 6 is an enlarged longitudinal sectional view showing a part of the water intake port portion according to the third embodiment. Note that the water inlet 2-2 according to the third embodiment is basically the same as the first embodiment described above in the components other than the configuration of the opening / closing mechanism as in the second embodiment. Since they are the same, the same components are denoted by the same reference numerals, and description of common parts is omitted.

  As shown in FIG. 6, the opening / closing mechanism 30 in the third embodiment includes a valve body 28 provided inside the second water inlet 11, and a cylindrical wall of the second water inlet 11 according to the vertical displacement of the water level WL. And a floating ball 29 that tilts the valve body 28 up and down with a pivot part S provided at the fulcrum as a fulcrum.

  The valve body 28 is formed in a flat disk shape having an outer diameter along the diameter of the second water inlet 11. Then, the valve body 28 closes the second water inlet 11 in a horizontal posture and is rotated around the cylindrical wall of the second water inlet 11 so as to open the second water inlet 11 by being tilted downward. It is pivotally attached.

  The floating ball 29 is formed in substantially the same form as the floating ball 24 of the above-described second embodiment, and is connected to the pivotal attachment portion S of the valve body 28 via a link mechanism. More specifically, as shown by a two-dot chain line in FIG. 6, when the valve body 28 is in an obliquely downward posture in which the second water inlet 11 is opened, the valve body 28 floats up to the maximum and lowers as the water level WL is lowered. A first link part 31 integrally connected to the pivot part S of the valve body 28 at an appropriate angle so that the valve body 28 can close the second water inlet 11 in a horizontal posture when With the second link portion 32 having one end side rotatably connected to the other end side of the ring portion 31 and the other end side attached to the floating ball 29, the pivoting portion S of the valve body 28 and the floating ball 29 are connected to each other. It is formed to be connected.

  Although not shown, when the valve body 28 is returned from the obliquely downward posture in which the second water inlet 11 is opened to the horizontal posture in which the second water inlet 11 is closed, the circumferential edge of the valve body 28 The valve part formed in the ring shape for making it contact | abut to the state which closely_contact | adhered can be provided along the internal peripheral surface of the 2nd water inlet 11. FIG. Further, a material having a high sealing property can be provided on the periphery of the valve body 28 as necessary. Further, the valve body 28 can be configured to open the second water inlet 11 by tilting obliquely upward from a horizontal posture in which the second water inlet 11 is closed.

  The specific configuration of the embodiment of the present invention is not limited to each of the above-described embodiments, and the present invention is not limited even if there is a design change or the like without departing from the gist of the present invention described in each claim. Is included. For example, as described in detail in the first to third embodiments, the weight of the second water suction port 11 provided on the circumference of the water suction port member 2a of the water suction port portion 2, 2-1, 2-2 is as follows. With respect to the first water inlet 10 opened in the portion 12, not only at a position opening upward at one axially opposite (upper) position, but also obliquely upward from the side of the circumference of the water inlet member 2 a Each can be provided to open. That is, the 2nd water inlet 11 can each be provided so that it may open toward three upwards from three places of the periphery of the water inlet member 2a. As a result, as shown in FIG. 4, when the stagnant water W is accumulated at a high water level leaving a space M through which the gas in the pipe circulates on the upper side in the pipe, the drainage of the stagnant water W to the outside of the pipe is removed. Can be performed more efficiently.

  The opening / closing mechanism 30 described above is basically operated by a floating device that moves in accordance with the water level WL of the in-pipe water W, and opens and closes the second water inlet 11. Other than the spherical shape as described above, the opening / closing mechanism 30 may be operated by a detecting means for detecting a water level other than the float.

It is the schematic which shows the whole structure of the in-pipe water removal apparatus which concerns on embodiment of this invention, and the in-pipe water removal method which concerns on embodiment of this invention. It is a vertical side view which expands and shows the water intake port part which concerns on 1st Embodiment. It is XX sectional drawing of FIG. It is the longitudinal cross-sectional view of the principal part which expands and shows the state which the water intake port reached | attained the in-pipe water stagnation location, The figure (a) shows the state when the water stagnation is accumulated in the high water level state, The figure (b) shows a state when the water level has fallen to the lower side in the pipe. It is a longitudinal cross-sectional view which expands and shows a part of water inlet part which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view which expands and shows a part of water inlet part which concerns on 3rd Embodiment.

Explanation of symbols

A: In-pipe stagnant water removal device 1: Water absorption hose 2, 2-1, 2-2: Water absorption port 2a: Water absorption port member 2b: Outer member 3: Suction device 4: Tube camera
9: Water absorption hole 10, 11: Water absorption port 12: Weight part 13, 23, 28: Valve body 14, 22: Valve part 24, 29: Floating ball 30: Opening and closing mechanism B: Pipe line W: Water stagnation WL: Water stagnation Water level

Claims (5)

A water absorption hose that can be inserted from a side opening of a pipe line, and a water absorption port portion that is attached to the distal end side of the water absorption hose, and water in the pipe is introduced into the water absorption hose from the water absorption port provided in the water absorption port portion. An in-pipe water removal device that sucks and removes drainage from the pipe through the water absorption hose,
The water inlet portion includes a first water inlet port that always opens downward and a second water inlet port formed in a direction different from the first opening portion,
The second water inlet is opened when the second water inlet is at a position lower than the water level in the pipe, and at least the second water inlet is at a position higher than the water level in the pipe. Is provided with an open / close mechanism for closing the pipe.   The in-pipe water removal device according to claim 1, wherein the opening / closing mechanism is operated by a float that moves according to a water level in the in-pipe water. The water inlet portion includes a water inlet member that is rotatably mounted around an axis along the axial core line of the water absorbing hose,
The water intake port member is formed in a substantially cylindrical shape having a water absorption hole communicating with the water absorption hose at the shaft core, and includes the water absorption ports communicated with the water absorption hole at several places on the circumference thereof, respectively. An in-pipe water removal device comprising a weight part heavier than other parts of the circumference at a part of the circumference where the water inlet is opened. A tube head camera provided with a camera head on the tip side of the water suction port, and a camera cable connected to the camera head being inserted into the water suction hose;
A suction device comprising a suction force generating means connected to a proximal end side of the water absorption hose and generating a suction force in the water absorption hose, and a water storage tank for storing water drained through the water absorption hose;
The in-pipe water removal apparatus according to any one of claims 1 to 3, further comprising: Using the in-pipe water removal device provided with a water absorption hose that can be inserted from the side opening of the pipe, and a water absorption port attached to the tip side of the water absorption hose, water in the pipe was provided in the water absorption port. A method for removing the stagnant water in the pipe that sucks into the water absorption hose from the water suction port and removes the drainage from the pipe through the water absorption hose.
Insert the water inlet and the water absorption hose from the side opening of the pipe in the live pipe state,
After the water intake port reaches the water stagnant spot in the pipe, both the first water intake port provided at the water intake port portion and always opened downward and the second water intake port formed upward are lower than the water level. If it is in the position, open the second water inlet, and absorb water from both the first water inlet and the second water inlet,
At least when the second water inlet is at a position higher than the water level, the second water inlet is closed and water is absorbed only from the first water inlet. Removal method.

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