JP2012184822A - Device for introduction in pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably and smoothly introduce an in-pipe working apparatus from a branched pipe portion into a fluid pipe while suppressing the damage to the in-pipe working apparatus, cables or the like, even under such a condition that a peripheral edge of an opening on an inner circumferential face side of a branch port is formed into a sharp corner with burrs produced during drilling.SOLUTION: An introduction work casing 15 that can be connected to a downstream side of a branched pipe portion 3 includes: holding means D1 that detachably holds an in-pipe working apparatus (A) in a posture along the direction of a branch axis core Y; transporting means D2 that transports the holding means D1 from the branched pipe portion 3 to a fluid pipe 1 side along the direction of the branch axis core Y; and moving and guiding means D3 that moves and guides the in-pipe working apparatus (A) pushed out of the holding means D1 by the fluid pressure, to the downstream side by allowing the in-pipe working apparatus (A) to pass over a position apart from a downstream side portion P on a peripheral edge 2a of an opening on an inner circumferential face side of the branch port 2, toward the pipe axis core X side of the fluid pipe 1. The moving and guiding means D3 comprises a moving and guiding member 19, which is extended from the holding means D1 to at least the downstream side portion P of the branch port 2 while maintaining a contact state with the downstream side portion P.

Description

  The present invention relates to an in-pipe introduction device that introduces in-pipe work devices such as in-pipe inspection devices and in-pipe foreign matter removing tools that are movable in a fluid pipe from a branch pipe portion that communicates with a branch port formed in the fluid pipe.

  In the conventional in-pipe introduction device, a holding means for detachably holding the in-pipe work device in a posture along the branch axis direction in an introduction work case connected to the branch pipe portion of the fluid pipe via a sub valve; Transfer means for feeding the holding means along the branch axis direction from the branch pipe portion to a set feed position located in the fluid pipe is provided.

  In addition, in order to constitute the holding means, the in-pipe work equipment is received in a posture along the branch axis direction at the lower end portion of the transfer rod of the transfer means that is pierced and supported so as to be movable up and down with respect to the introduction work case. Provided with a half-cylindrical guide member, the guide member can temporarily hold the in-pipe work device received by the guide member, and the in-pipe work device is automatically fixed by the fluid pressure in the fluid pipe. A holder that can be released automatically is provided (see Patent Document 1).

JP 2000-346272 A

  In the conventional in-pipe introduction device, when introducing the in-pipe work device into the pipe, the in-pipe work device is temporarily attached to the guide member of the holding means by the holder in the closed valve connected to the branch pipe portion of the fluid pipe. After attaching the introduction work case that is stopped and held, the sub-valve is opened to feed the transfer rod of the transfer means, and when the guide member of the holding means is located at the set feed position in the fluid pipe, The in-pipe work device temporarily held in the guide member by the holder is automatically released by the fluid pressure and sent toward the downstream side of the fluid pipe.

  At this time, the in-pipe work device temporarily held by the holder in the guide member receives fluid pressure from the feed tip side in accordance with the feed operation of the guide member to the set feed position in the fluid pipe, and moves in the branch axis direction. Since the posture changes to the posture along the pipe axis direction of the fluid pipe while tilting from the posture along, the inner periphery of the branch port in which the outer peripheral surface of the in-pipe work device is formed in the fluid pipe in the tilt posture in the middle of the posture change There is a possibility of causing damage by colliding with the downstream portion of the peripheral edge of the surface side opening.

  Moreover, there is a possibility that the cable led out from the in-pipe work device as a result of feeding the in-pipe work device to the downstream side may be slidably contacted with the downstream portion of the inner peripheral surface side opening periphery of the branch port, and particularly damaged. In the case where the opening peripheral edge on the inner peripheral surface side of the branch port forms a sharp corner portion where burrs are generated at the time of drilling, the in-pipe work equipment and the cable are easily damaged.

  Furthermore, when the total length of the in-pipe working device is close to the diameter of the branch port and the inner diameter of the fluid pipe or larger than the diameter of the branch port and the inner diameter of the fluid pipe, the total length of the in-pipe work device is equal to the branch port. The outer peripheral surface of the in-pipe working device that moves away from the guide member by fluid pressure is smaller than the diameter of the fluid pipe and the inner diameter of the fluid pipe. The possibility of colliding with the downstream side part in increases.

  The present invention has been made in view of the above circumstances, and the main problem is that, for example, the inner peripheral surface side opening periphery of the branch port is formed at a sharp corner portion where burrs are generated during drilling. The present invention also provides an in-pipe introduction device that can reliably and smoothly introduce the in-pipe work device from the branch pipe portion into the fluid pipe in a state in which damage to the in-pipe work device, the cable, and the like is suppressed.

A first characteristic configuration according to the present invention is an in-pipe introduction device that introduces an in-pipe work device that can move in a fluid pipe from a branch pipe portion that communicates with a branch port formed in the fluid pipe.
A holding means for detachably holding the in-pipe work device in a posture along the branch axis direction of the branch pipe part in an introduction work case connectable to the downstream side of the branch pipe part, and the holding means as the branch axis In-pipe work that is released from the branch pipe part along the direction to the set-in feed position where at least a part of the in-pipe work equipment faces into the fluid pipe, and is released from the holding means at the set-up position and pushed out by the fluid pressure Movement guide means is provided for moving and guiding the device to the downstream side through a position distant from the downstream side portion of the inner peripheral surface side opening periphery of the branch opening of the fluid pipe to the pipe axis side of the fluid pipe, and the movement The guide means corresponds to at least the downstream part or the downstream part in a state of coming into contact with or close to the downstream part of the inner peripheral surface side opening periphery of the branch port from the holding means or the transfer means. In that it is configured from a mobile guide member which extends up to the point.

  According to the above configuration, when the in-pipe work device is introduced into the fluid pipe, the in-pipe work device is detachably held in a posture along the branch axis direction of the branch pipe portion on the downstream side of the branch pipe portion. An introduction work case having a holding means and a transfer means is connected, and the holding means is sent to a set feed position by the transfer means.

  At this set feed position, at least a part of the in-pipe work device held by the holding means is in a state of facing the fluid pipe, and in this state, when the in-pipe work device released from the holding means is pushed out by the fluid pressure, When the in-pipe work device is tilted from the posture along the branch axis direction and changed in posture to the posture along the tube axis direction of the fluid pipe, the in-pipe work device is moved to the inner periphery of the branch port of the fluid pipe by the moving guide means. Since it is guided to move downstream through a position away from the downstream part at the peripheral edge of the surface side opening toward the tube axis side of the fluid pipe, the in-pipe work device is compared with the downstream part at the peripheral edge of the inner peripheral surface side of the branch port. Can be prevented from colliding with each other, or the cable derived from the in-pipe work equipment can be prevented from sliding.

  In addition, since the movement guide member extends from the holding means or the transfer means to the downstream side portion or the portion corresponding to the downstream side portion of the inner peripheral surface side opening periphery of the branch port, for example, the inside of the branch port Compared to the case where the movement guide member is provided only at the position corresponding to the downstream side portion at the peripheral edge of the opening on the circumferential surface side, the in-pipe work device and the cable released from the holding means are better guided to move from the earliest possible time. Can do.

  Therefore, in-pipe work equipment in a state in which damage to pipe work equipment, cables, and the like is suppressed even under conditions where the inner peripheral surface side opening periphery of the branch port is formed at a sharp corner where burrs have occurred during drilling. Can be reliably and smoothly introduced into the fluid pipe from the branch pipe section.

  According to a second characteristic configuration of the present invention, the holding means includes a fixed cover attached to the transfer means and a storage space for the in-pipe work equipment between the fixed cover and the upper direction of the fixed cover in the feeding direction. A movable cover that is openably and closably connected to the base end portion of the side, and the movable cover is opened at the set feed position so that the distal end of the movable cover is at least on the inner peripheral surface side of the branch port It is formed in the length located in the downstream site | part in the periphery of an opening, or the location corresponded to the said downstream site | part, and is in the point by which the movement guide member of the said movement guide means is comprised with the said movable cover.

  According to the above configuration, when the holding means is sent to the set feeding position by the transfer means and the movable cover of the holding means is opened with respect to the fixed cover, the storage space between the opposing surfaces of the movable cover and the fixed cover is placed in the storage space. When the stored in-pipe work device receives fluid pressure and is pushed out together with the opening of the movable cover, the in-pipe work device changes its posture from the posture along the branch axis direction to the posture along the tube axis direction of the fluid pipe. The in-pipe work device is moved and guided along the inner surface of the movable cover to the downstream side through a position away from the downstream portion of the inner peripheral surface side opening periphery of the branch port toward the tube axis side of the fluid pipe.

  Therefore, the movement guide member of the movement guide means can be configured using a movable cover that forms a storage space for the in-pipe work equipment with the fixed cover, and the in-pipe work equipment can be used from the beginning of the opening of the movable cover. It is possible to reliably guide the movement.

  A third characteristic configuration according to the present invention is a cover opening / closing operation means for switching between a closing operation state in which the movable cover is held in a closed posture against a fluid pressure and an opening operation state in which the movable cover is opened by the fluid pressure. Is in the point provided.

According to the above configuration, until the holding means is sent to the set feed position by the transfer means, the cover opening / closing operation means is closed, and the movable cover is unexpectedly opened by the fluid pressure before the set feed position. Can be prevented.
When the holding means reaches the set feeding position, the cover opening / closing operation means can be opened and the movable cover can be opened by the fluid pressure, so that the in-pipe work device can be opened from the beginning of the opening of the movable cover at the setting feeding position. Can be reliably guided to move.

  According to a fourth characteristic configuration of the present invention, the cover opening / closing operation means is provided with a cord-like body that can be fed and wound, and the cord-like body has an interval larger than the outer diameter of the in-pipe work device. In other words, it is led out from the both sides in the cover width direction on the outer surface of the movable cover to the introduction work case side via the both sides in the cover width direction on the outer surface of the fixed cover.

  According to the above configuration, when the holding means is sent to the set feeding position by the transfer means, when the cord-like body of the cover opening / closing operation means is fed out, the movable cover is opened by receiving fluid pressure, and at the same time, the movable cover When the in-pipe work device housed between the opposing surfaces of the fixed cover and the fixed cover is pushed out by fluid pressure and the movable cover reaches the maximum open position, the in-pipe work device moves along the inner surface of the movable cover. It is guided to move downstream through a position distant from the downstream portion of the inner peripheral surface side opening periphery to the tube axis side of the fluid pipe.

  In addition, when the in-pipe work equipment is collected in the fixed cover at the set feed position when the in-pipe work is finished, the in-pipe work is performed from both sides in the cover width direction on the outer surface of the movable cover to both sides in the cover width direction on the outer surface of the fixed cover Since a pair of cable-like bodies are arranged with an interval larger than the outer diameter of the equipment, the collection posture of the in-pipe work equipment is corrected by the contact between the pair of rope-like bodies and the collected pipe work equipment. The in-pipe work equipment can be smoothly collected in the fixed cover.

  According to a fifth feature of the present invention, the diameter of the branch port is configured to be substantially the same as the inner diameter of the fluid pipe, and the total length of the in-pipe work device is configured to be larger than the diameter of the branch port. In the point.

  According to the above configuration, even when a part of the in-pipe work equipment held by the holding means protrudes to the branch pipe part side through the branch port in the state where the holding means is sent to the set feeding position by the transfer means, When the in-pipe working device released from the holding means is pushed out by the fluid pressure, it is guided to move downstream through a position away from the downstream portion of the inner peripheral surface side opening periphery of the branch port toward the tube axis side of the fluid pipe. The movement guide means can change the posture to the posture along the tube axis direction of the fluid pipe while smoothly pulling the in-pipe work device in the posture along the branch axis direction into the fluid tube.

  A sixth characteristic configuration according to the present invention is that the in-pipe work device is equipped with an in-pipe imaging camera and an in-pipe illuminator.

  According to the above configuration, it is possible to suppress damage to the camera of the in-pipe work device and the in-tube illuminator due to the collision with the downstream portion at the inner periphery of the branch port.

Partially cutaway side view showing a drilling operation process as a preparation operation for mounting the in-pipe introduction device of the first embodiment of the present invention. Longitudinal side view when the in-pipe introduction device is installed Enlarged side view of the main part of the in-pipe introduction device IV-IV line enlarged sectional view in FIG. Vertical side view when holding means is sent to the set feed position Longitudinal side view when holding means is released Longitudinal side view at the start of feeding in-pipe inspection equipment Longitudinal side view showing a second embodiment of the present invention Longitudinal side view showing a third embodiment of the present invention

[First Embodiment]
FIG. 1 shows an example of an in-pipe work device that can be moved in the water pipe 1 by a water flow or a driving force of a mounted driving section in a pipe system of a water pipe 1 that is an example of a fluid pipe made of cast iron pipe, steel pipe, or the like. Thus, the flow of tap water (water supply) is maintained on the pipe wall of the water pipe 1 in the inspection target area that needs to be inspected by the in-pipe inspection device A equipped with the TV camera 30 for in-pipe imaging and the in-pipe illumination device 31. The perforation work process of penetrating and forming the branch port (perforation port) 2 for introducing the in-pipe inspection device A into the pipe in the state of continuous water is shown.

  In this drilling operation step, the branch pipe portion 3 protruding outward along the vertical direction (branch axis Y direction) perpendicular to the pipe axis X of the water pipe 1 is provided on the outer peripheral surface of the water pipe 1. An integrally formed cast iron pipe joint B is externally fixed in a watertight state, and the connection flange 3A of the branch pipe portion 3 of the pipe joint B is provided upstream of the gate valve 4 provided with a valve body 4C that can be opened and closed. The side connection flange 4A is fixedly connected in a watertight state with a plurality of bolts 10 and nuts 11, and the downstream connection flange 4B of the gate valve 4 is an example of a rotary cutting tool that forms the branch port 2. A connecting flange 6A of a drilling housing 6 of a drilling apparatus C provided with a certain hole saw 5 is fixedly connected in a watertight state by a plurality of bolts 10 and nuts 11.

  The pipe joint B is divided into a plurality of pipes in the pipe circumferential direction so as to be externally mounted on the water pipe 1 (in this embodiment, three divisions), and the branch pipe portion 3 is integrally formed in one of them. It consists of split joint bodies 7-9, and the pipe joints 7-9 are provided with a plurality of bolts 10 at adjacent ends of the split joint bodies 7-9 sheathed on the water pipe 1 at both ends in the pipe circumferential direction. Connecting portions 7A to 9A for fixed connection with the nut 11 are integrally formed to project, and the divided joint bodies 7 to 9 are connected to the outer peripheral surface of the water pipe 1 and the connecting portions 7A to 7A. A synthetic rubber sealing material 12 for sealing between the connecting surfaces of 9A is mounted.

  Then, the hole saw 5 of the perforating apparatus C is driven and rotated and fed in the direction of the branch axis Y through the flow path in the gate valve 4 and the flow path in the branch pipe portion 3, thereby branching into the pipe wall of the water pipe 1. (Perforation port) 2 is formed through.

  The diameter of the branch port 2 is approximately the same as the inner diameter of the water pipe 1 or smaller than the inner diameter of the water pipe 1 and is substantially equal to the inner diameter of the branch pipe part 3 or larger than the inner diameter of the branch pipe part 3. It is configured with small dimensions.

  2 to 7 show an in-pipe introduction device D for introducing the in-pipe inspection apparatus A into the water pipe 1 through the branch port 2 formed by drilling the water pipe 1 from the branch pipe portion 3 of the pipe joint B. The in-pipe inspection device A is connected to an introduction work case 15 fixedly connected in a watertight state to a downstream connection flange 4B of the gate valve 4 which is a downstream portion of the branch pipe portion 3 via a plurality of bolts 10 and nuts 11. Holding means D1 detachably holding the branch pipe part 3 in a posture along the branch axis Y direction, and at least the holding means D1 from the branch pipe part 3 along the branch axis Y direction into the water pipe 1 The pipe 1 is a transfer means D2 that feeds to a set feed position where a part of the in-pipe inspection equipment A faces, and the pipe inspection equipment A that is released from the holding means D1 that is at the set feed position and is pushed out by water pressure (fluid pressure). Inner peripheral surface of the branch port 2 The in-pipe inspection device A that is moved and guided to the downstream side through the position away from the downstream side portion P in the opening peripheral edge 2a toward the tube axis X side of the water pipe 1, in other words, the pipe inspection device A that is pushed out by water pressure (fluid pressure). There is provided movement guide means D3 that moves and guides the downstream side through a detour path that avoids colliding with the downstream portion P in the inner peripheral surface side opening peripheral edge 2a of the branch port 2 of the branch port 2.

  The introduction work case 15 includes a plate flange 15A having the same outer diameter that is fixedly connected to the downstream side connection flange 4B of the gate valve 4 via a bolt 10 and a nut 11, and a holding means D1 that holds the in-pipe inspection device A. The introduction work cylinder 15B has an inner diameter that can be stored, and the introduction work cylinder 15B extends from the branch axis Y to the pipe axis X direction of the water pipe 1 in the plate flange 15A. In the portion biased to the upstream side, it is slidably supported so as to be slidable in the vertical direction in a watertight manner, and can be selectively fixedly connected at any position in the vertical movement range or at a plurality of specific positions. .

  Therefore, the holding means D1 holding the in-pipe inspection device A that is sent from the introduction work cylinder 15B to the set feed position is a portion that is biased upstream from the branch axis Y along the tube axis X direction of the water pipe 1. In the pipe inspection device A in a posture along the branch axis Y direction, a space for changing to a posture along the pipe axis X direction of the water pipe 1 is secured on the downstream side of the set feed position. can do.

  Position change fixing means for fixing and connecting the introduction work cylinder 15B to the plate flange 15A of the introduction work case 15 so as to change the installation position in the vertical direction is arranged on the outer peripheral surface of the introduction work cylinder 15B in the direction of the axis of the cylinder. A connecting member 16 that is slidable in a watertight state and that can be selectively fastened with a bolt or the like against a water pressure at an arbitrary position or a plurality of specific positions in the sliding range is provided. Is fixedly connected to the plate flange 15A via a bolt 17 in a watertight state.

  The transfer means D2 includes an insertion rod 18 that is pierced and supported so as to be slidable in the vertical direction in a watertight state with respect to the top plate portion 15b of the introduction work cylinder 15B of the introduction work case 15. An operation handle 18A is provided at the upper end of 18.

  The movement guide means D3 has a semi-cylindrical shape capable of receiving a semi-circumferential surface located downstream in the tube axis X direction of the in-pipe inspection device A in a posture along the branch axis Y direction, and the holding means. It extends in an inclined posture from D1 to at least the downstream part P or a part corresponding to the downstream part P in a state of being in contact with or close to the downstream part P on the inner peripheral surface side opening peripheral edge 2a of the branch port 2. The movement guide member 19 is constituted.

  The holding means D1 is attached to the lower end portion of the insertion rod 19 in such a manner that the half circumferential surface located upstream in the tube axis X direction of the in-pipe inspection device A in a posture along the branch axis Y direction can be received. A semi-cylindrical fixed cover 20 and a mounting arm 21 provided at the proximal end on the upper side in the feeding direction of the fixed cover 20 in a state in which a storage space S for the in-tube inspection device A is formed between the fixed cover 20 and the fixed cover 20. And a movable cover 22 that is pivotally connected so as to be able to swing open and close. The fixed cover 20 has a plurality of water passage holes 20a through which tap water can pass.

  When the movable cover 22 is opened at the set feed position where the tip (lower end) of the fixed cover 20 is in contact with the bottom of the inner wall of the water pipe 1, the tip of the movable cover 22 is the inner peripheral surface of the branch port 2. The moving guide member 19 of the moving guide means D3 is also used as the movable cover 22 with a length that is in contact with the downstream portion P of the side opening periphery 2a.

  A cover opening / closing operation means D4 is provided for switching between a closing operation state in which the movable cover 22 is held in a closed position against water pressure and an opening operation state in which the movable cover 22 is opened by water pressure. D4 is an example of a cord-like body that can be fed and wound, and includes a wire 25 led out from a wire drum 24 installed outside the tube.

  The wire 25 is in the cover width direction (the direction connecting the end surfaces of both side walls of the semi-cylindrical movable cover 22) with an interval larger than the outer diameter of the in-pipe inspection device A at the front end side outer surface of the movable cover 22. The both ends of the wire 25 are formed of a pair of wires 25, and both the wires 25 are arranged in the cover width direction on the outer surface of the upper and lower intermediate portions of the fixed cover 20 (end surfaces of both side walls of the semi-cylindrical fixed cover 20). To the wire drum 24 outside the tube via the guide pulleys 26 provided on both sides of the introduction work case 15 and through the watertight outlets formed in the top plate part 15b of the introduction work cylinder 15B of the introduction work case 15. It is wound up.

  When the insertion rod 18 of the transfer means D2 is pushed in to the set feed position where the tip of the fixed cover 20 comes into contact with the bottom of the inner wall of the water pipe 1, the wire 25 of the cover opening / closing operation means D4 is fed out. When operated, water pressure is applied to the upstream peripheral surface portion of the in-pipe inspection device A through the water passage hole 20a of the fixed cover 20, so that the movable cover 22 is opened by the water pressure acting on the in-pipe inspection device A. At the same time, the in-pipe inspection device A housed between the opposed surfaces of the movable cover 22 and the fixed cover 20 is pushed out by water pressure.

  When the movable cover 22 reaches the maximum open position, the tip of the movable cover 22 comes into contact with the downstream portion P of the inner peripheral surface side opening peripheral edge 2a of the branch port 2 or a position near the downstream side thereof, The inspection device A is guided to move downstream along the inner surface of the movable cover 22 through a position away from the downstream portion P on the inner peripheral surface side opening peripheral edge 2a of the branch port 2 toward the pipe core X side of the water pipe 1. Therefore, the outer peripheral surface of the in-pipe inspection device A collides with the downstream portion P in the inner peripheral surface side opening peripheral edge 2a of the branch port 2, or the cable 33 led out from the in-pipe inspection device A is in sliding contact. Can be suppressed.

  Further, when the in-pipe inspection device A is collected into the fixed cover 20 at the set feeding position at the end of the in-pipe inspection work, the cover on the outer surface of the intermediate portion of the fixed cover 20 from both sides in the cover width direction on the outer surface on the distal end side of the movable cover 22 Since the pair of wires 25 is disposed across the both sides in the width direction with an interval larger than the outer diameter of the in-pipe inspection device A, the contact between the pair of wires 25 and the collected in-pipe inspection device A Thus, the collection posture of the in-pipe inspection device A can be corrected, and the in-pipe inspection device A can be smoothly collected in the fixed cover 20.

  The in-pipe inspection device A includes a television camera 30 for photographing the inner wall surface of the water pipe 1, an in-pipe illumination tool 31 for illuminating the inner wall surface of the water pipe 1 to be photographed, and a horizontal thruster 32 for imparting a propulsive force. Etc., and the entire length of the in-pipe inspection device A is configured to be larger than the diameter of the branch port 2 and the inner diameter of the water pipe 1.

  The in-pipe inspection device A is provided with a cable 33 including a power line, a video signal line, a control signal line, and the like. The cable 33 passes through a cable guide 34 provided on the mounting arm 21 and is introduced into the pipe. The work case 15 is wound around a cable drum 35 installed outside the pipe through a watertight outlet port formed in the top plate portion 15b of the introduction work cylinder 15B.

  In the first embodiment, when the movable cover 22 that also serves as the movement guide member 19 of the movement guide means D3 is opened at the set feed position, the distal end of the movable cover 22 is located inside the branch port 2. Although the length is formed so as to be in contact with the downstream side portion P in the peripheral surface side opening peripheral edge 2a, the movable cover 22 may be configured to protrude to the downstream side from the downstream side portion P.

  In the first embodiment, when the movable cover 22 is opened at the set feed position, the tip of the movable cover 22 is brought into contact with the downstream portion P on the inner peripheral surface side opening peripheral edge 2 a of the branch port 2. However, when the movable cover 22 is opened at the set feed position in the pivotal support portion that pivotally supports the movable cover 22 so as to be swingable and openable, the distal end portion of the movable cover 22 is on the inner peripheral surface side of the branch port 2. The maximum opening angle may be regulated so as to stop at an opening position that is not in contact with the downstream portion P at the opening periphery 2a.

  Further, on the inner surface of the movable cover 22 that forms the storage space S of the in-pipe inspection device A with the fixed cover 20, the distal end portion of the movable cover 22 is a downstream portion of the inner peripheral surface side opening peripheral edge 2 a of the branch port 2. A buffer layer such as a rubber layer may be formed to relieve the impact when contacting P.

[Second Embodiment]
In the first embodiment described above, the movable cover 22 that also serves as the movement guide member 19 of the movement guide means D3 is in a linear shape that directly contacts the downstream portion P of the inner peripheral surface side opening peripheral edge 2a of the branch port 2. However, as shown in FIG. 8, the distal end portion of the movable cover 22 is in a state of bypassing the downstream portion P in the inner peripheral surface side opening peripheral edge 2 a of the branch port 2 toward the tube axis X side. You may comprise in the arc shape or polygonal shape which can contact | abut to the inner wall face of the water pipe 1 downstream from the downstream site | part P. FIG.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
In the first embodiment described above, the movable cover 22 of the holding means D1 is also used as the movement guide member 19 of the movement guide means D3. However, as shown in FIG. 9, it is provided on the insertion rod 18 of the transfer means D2. A closed state in which the half peripheral surface located downstream in the tube axis X direction of the in-pipe inspection device A in a posture along the branch axis Y direction can be received on the mounting portion 18B, and the inner peripheral surface of the branch port 2 In an open state extended in an inclined posture from at least the holding means D1 to the downstream part P or a part corresponding to the downstream part P in a state in contact with or close to the downstream part P in the side opening peripheral edge 2a. You may attach the movement guide member 19 which can be switched dynamically.

The movement guide member 19 is also used as a pressing member for holding the in-pipe inspection apparatus A in a posture along the branch axis Y direction with the fixed cover 20 of the holding means D1 in the closed state.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In the above-described embodiment, the in-pipe inspection device A has been described as an example of the in-pipe work device that is movable in the water pipe 1. However, the embodiment is not limited thereto, and the in-pipe work device A is not limited thereto. As such, it may be an in-pipe foreign matter removing tool or the like that sucks and removes foreign matter existing in the water pipe 1 outside the pipe.

  (2) In the above-described embodiment, the introduction work case 15 of the in-pipe introduction device D is attached to the gate valve 4, but when a connecting pipe such as a short pipe is connected to the downstream side of the gate valve 4. The introduction work case 15 may be attached to the connecting pipe, and when the gate valve 4 is not present, the introduction work case 15 may be directly attached to the branch pipe portion 3.

  (3) In the above-described embodiment, the branch wall (perforation port) 2 for penetrating the in-pipe inspection device A into the pipe is formed in the pipe wall of the water pipe 1 so as to introduce the in-pipe inspection device A into the pipe in an indefinite water state while maintaining the flow of tap water. However, when the branch pipe portion 3 exists in the water pipe 1 in the inspection target area and a fluid device such as a fire hydrant is attached to the branch pipe portion 3 via the sub valve, the fluid is discharged from the existing sub valve. The apparatus may be removed and the introduction work case 15 of the in-pipe introduction device D may be attached.

  (4) In the above-described embodiment, the pipe structure in which the pipe joint B having the split structure provided with the branch pipe portion 3 is attached to the water pipe 1 has been described as an example. The technique of the present invention may be applied to a pipe structure that is integrally formed with the pipe 1.

(5) In the above-described embodiment, the in-pipe inspection apparatus A configured to have a total length larger than the diameter of the branch port 2 and the inner diameter of the water pipe 1 is exemplified. The total length may be smaller than the diameter of the branch port 2 and the inner diameter of the water pipe 1.
In this case, the entire in-pipe work device A that has been sent to the set feed position by the feed means D <b> 2 faces the fluid pipe 1 such as a water pipe.

(6) In the above-described embodiment, the holding means D1 is configured such that the holding force of the in-pipe work device A is automatically or manually released when it is sent to the set feed position. It may be configured such that the holding force of the in-pipe work device A is gradually released by the fluid pressure in a stage before reaching the position.
Further, the holding means D1 may be provided with a forced pushing means for forcibly pushing the in-pipe work device A downstream by mechanical force when it is sent to the set feeding position.
In short, as the holding means D1, the in-pipe work device A can be detachably held in a posture along the branch axis Y direction of the branch pipe portion 3 or substantially along the branch axis Y direction. Any structure may be used.

(7) In the above-described embodiment, the transfer means D2 is inserted from the insertion rod 18 that is pierced and supported so as to be slidable in the vertical direction in a watertight state with respect to the top plate portion 15b of the introduction work cylinder 15B of the introduction work case 15. Although configured, the holding means D1 may be switched between a standby position and a set feeding position by mechanical force such as a fluid pressure cylinder or a screw type expansion / contraction mechanism.
In short, as the transfer means D2, the holding means D1 is fed from the branch pipe portion 3 into the fluid pipe 1 along the branch axis Y direction to a set feed position where at least a part of the in-pipe work device A faces. Any structure can be used as long as possible.

(8) In the above-described embodiment, the cross-sectional shape of the movement guide member 19 of the movement guide means D3 is configured to be a semicircular arc shape or a similar shape, but the movement guide member 19 is configured to be a flat plate shape. Further, the movement guide member 19 may be composed of a member provided with a plurality of movement guide bars and a plurality of water passage holes.
In short, as the movement guide means D3, the in-pipe work device A that is released from the holding means D1 at the set feeding position and pushed out at least with fluid pressure (fluid pressure and forced pushing force) may be used as the fluid pipe 1. As long as it can move and guide to the downstream side through a position away from the downstream portion P on the inner peripheral surface side opening peripheral edge 2a of the branch port 2 to the tube axis X side of the fluid pipe 1, it has any structure. May be used.

  (9) In the above-described embodiment, the water pipe has been described as an example of the fluid pipe. However, the fluid pipe may be a sewer pipe or a gas pipe.

A In-pipe work equipment (in-pipe inspection equipment)
D1 Holding means D2 Transfer means D3 Movement guide means D4 Cover opening / closing operation means P Downstream part X Pipe axis Y Branch axis 1 Fluid pipe (water pipe)
2 Branch port 2a Inner peripheral surface side opening peripheral edge 3 Branch pipe part 15 Introduction work case 19 Movement guide member 20 Fixed cover 22 Movable cover 25 Cord-like body (wire)
30 TV camera 31 In-tube lighting

Claims (6)

An in-pipe introduction device for introducing an in-pipe work device that can move in a fluid pipe from a branch pipe portion that communicates with a branch port formed in the fluid pipe,
A holding means for detachably holding the in-pipe work device in a posture along the branch axis direction of the branch pipe part in an introduction work case connectable to the downstream side of the branch pipe part, and the holding means as the branch axis In-pipe work that is released from the branch pipe part along the direction to the set-in feed position where at least a part of the in-pipe work equipment faces into the fluid pipe, and is released from the holding means at the set-up position and pushed out by the fluid pressure Movement guide means is provided for moving and guiding the device to the downstream side through a position distant from the downstream side portion of the inner peripheral surface side opening periphery of the branch opening of the fluid pipe to the pipe axis side of the fluid pipe, and the movement The guide means corresponds to at least the downstream part or the downstream part in a state of coming into contact with or close to the downstream part of the inner peripheral surface side opening periphery of the branch port from the holding means or the transfer means. Tube introduction device and a mobile guide member which extends up to the point.   The holding means is openable and closable with respect to the proximal end on the upper side in the feeding direction of the fixed cover in a state in which a storage space for the in-pipe work device is formed between the fixed cover attached to the transfer means and the fixed cover. A movable cover coupled to the movable cover, and the movable cover is opened at the set feed position, and the distal end of the movable cover is at least a downstream portion of the inner peripheral surface side opening periphery of the branch port or the downstream side The in-pipe introduction device according to claim 1, wherein the in-pipe introduction device is formed in a length located at a position corresponding to the part, and the movement guide member of the movement guide means is configured by the movable cover.   The cover opening / closing operation means is provided for switching operation between a closing operation state in which the movable cover is held in a closed posture against the fluid pressure and an opening operation state in which the movable cover is opened by the fluid pressure. In-pipe introduction device.   The cover opening / closing operation means is provided with a cord-like body that can be fed and wound, and the cord-like body has a cover width on the outer surface of the movable cover at a distance larger than the outer diameter of the in-pipe work device. The in-pipe introduction device according to claim 3, wherein the in-pipe introduction device is led out from both sides in the direction to the introduction work case side via both sides in the cover width direction on the outer surface of the fixed cover.   The diameter of the said branch port is comprised substantially the same as the internal diameter of a fluid pipe | tube, and the full length of the said in-pipe working apparatus is comprised larger than the diameter of the said branch port. The in-pipe introduction device described in 1.   The in-pipe introduction apparatus according to any one of claims 1 to 5, wherein the in-pipe work device is equipped with a camera for in-pipe imaging and an in-pipe illumination tool.

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