JP2009244419A - Cable pay-out mechanism to in-liquid investigation equipment, and cable pay-out method to in-liquid investigation equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable pay-out mechanism to in-liquid investigation equipment and a cable pay-out method to the in-liquid investigation equipment, capable of simplifying liquid sealing structure of a penetration part, by avoiding putting-in-and-out of a cable in the penetration part between a fluid portion and an outside, and capable of facilitating the pay-out and winding of the cable to the in-liquid investigation equipment. <P>SOLUTION: This cable pay-out mechanism to the in-liquid investigation equipment 20 pays out and winds the cable 42 for connecting the in-liquid investigation equipment 20 for investigation under a sealed state, to control and monitoring equipment 50 located in an outside of a sealed portion, and is provided with a winding drum 33 for paying out and winding the cable 42 connected to an in-liquid investigation equipment 20 side, in an inside of the sealed portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a part of a cable for connecting an in-liquid investigation device (investigation underwater robot) thrown into a liquid-tight part and a control and monitoring device placed outside when the investigation is performed in a liquid-tight part such as a water main. The present invention relates to a cable feeding mechanism to a submerged investigation device and a method of feeding a cable to a submerged investigation device for performing feeding and winding.

  When investigating the inside of a water main, the pressure inside the pipe is about 1 MPa for water supply, and at the time of investigation, it is necessary to investigate while keeping the water tight so that the water in the pipe does not leak to the outside. is there. In addition, in research facilities and chemical factories where liquids that cause environmental pollution problems when leaked to the outside are investigated, the liquid in the surveyed part should be in a liquid-tight state that does not leak outside. There is a need to.

  For example, when investigating the inside of a water main pipe, remove the air valve of the branch pipe that branches upward from the water main pipe and is provided with an air valve, etc. In-pipe investigation equipment (underwater robot for investigation) that is equipped with a propeller for movement, etc., and transmits data and power by cable is inserted into the water main, and inspection is performed by this in-pipe investigation equipment (for example, patents) (See Literature 1, Patent Literature 2, and Patent Literature 3.)

  In this investigation, a repair valve provided in the branch pipe is closed, an air valve or the like is removed from the branch pipe, and an insertion pipe containing the in-pipe investigation device is attached to the branch pipe. After installing this insertion pipe, open the repair valve to make it watertight, feed the cable connected to the pipe survey equipment, insert the pipe survey equipment into the water main, and feed the cable further. While in-pipe investigation equipment is moved within a specified range in the water main, the water main is investigated. When the survey is completed, the cable is pulled in and the pipe survey device is pulled into the insertion pipe from the water main. Thereafter, the repair valve is closed, the insertion pipe is removed, an air valve or the like is attached to the branch pipe, the repair valve is opened as necessary, and the original state is returned to complete a series of operations.

  This insertion pipe is a watertight device called an uninterrupted water insertion device for preventing the water main from shutting off during the survey, and maintains a watertight state against the high water pressure of the water main. The insertion tube is formed with a cable insertion part and a cable delivery part. The cable is guided to the outside of the insertion tube via the cable insertion portion, and the terminal portion is connected to the measurement and control device.

  In the prior art, the cable led to the outside via the cable insertion portion is wound around a winding drum (cable drum) arranged outside the insertion tube, or there is no winding drum. In some cases, it was stacked on the ground in an “eight-shape” and its terminal portion was connected to a measuring and recording device.

  The cable is fed into the insertion tube and is fed out by manually rotating a feed roller of a cable delivery unit installed inside the insertion tube. In some cases, the feed roller may be used to manually push in from the outside of the insertion tube. In the case of manually entering and exiting the cable, a cable operator is required in addition to the operator who operates the in-pipe investigation device.

  Moreover, in a prior art, the cable insertion part is penetrated and it is drawn in to the inside of a watertight state, or it is drawn out to the exterior of a non-watertight state. That is, the cable insertion portion needs to have a structure that allows a cable to be taken in and out while maintaining a watertight state. Therefore, when a high water pressure is applied like a water main, there is a problem that it becomes difficult to water-tighten the cable insertion portion.

  In addition, in order to pass the cable insertion part and put the cable in and out against the water pressure, the water pressure changes (for example, the water main changes from 0.3 MPa to 1 MPa) so that slip does not occur in the feed roller. Accordingly, there is a problem that the pressing force of the feed roller needs to be adjusted, and if the pressing force of the roller is increased, there is a problem that it becomes difficult to put in and out the cable at the cable insertion portion because the cross-sectional shape of the cable is changed. .

Furthermore, it is difficult to ensure the cleanliness of the cable wound on the winding drum placed outside, and there is a problem that it takes time to secure the cleanliness in the case of water supply or the like that requires high cleanliness. This problem of ensuring cleanliness is a serious problem especially when the inspection is performed when cables are stacked in the shape of "8" on the ground or when a fluid having a large influence on the environment is used.
JP 2007-91169 A JP 2003-43377 A JP-A-10-212257

  The present invention has been made in view of the above-described situation, and an object thereof is to simplify the liquid-tight structure of the penetrating portion by avoiding the insertion and removal of the cable at the penetrating portion between the liquid portion and the outside. Another object of the present invention is to provide a cable feeding mechanism to the submerged investigation device and a cable feeding method to the submerged investigation device that can easily carry out and wind the cable to the submerged investigation device.

  In order to achieve the above object, the cable feeding mechanism to the in-liquid inspection device of the present invention comprises an in-liquid inspection device to be investigated in a liquid seal state and a control and monitoring device placed outside the liquid seal portion. In the cable feeding mechanism to the submerged inspection device for feeding and winding the cable to be connected, a winding drum for feeding and winding the cable connected to the submerged investigation device side is provided in the liquid seal portion. Constitute.

  That is, the cable winding drum is arranged in the liquid seal portion on the insertion tube side, and the winding drum is configured to be fed out or wound up by rotating or driving the winding drum. On the other hand, the part of the cable connected to the control and monitoring device placed outside cuts the edge from the rotation with a slip ring etc. in the rotating shaft part of the take-up drum, and penetrates this non-rotating cable from the liquid seal part Remove the cable through the part and fix it, and eliminate the cable entry / exit through this penetration. In addition, you may attach a transmitter / receiver to each of the winding drum side and the control and monitoring device side to cut off the rotation and edge of the winding drum.

  With this configuration, it is possible to avoid the insertion and removal of the cable at the penetration part between the liquid part and the outside, so that the liquid-tight structure of the penetration part can be simplified, and the investigation in the liquid can be performed by rotating the winding drum in the liquid. Fine adjustment of the feeding and winding force of the cable to the device is unnecessary, and the feeding and winding can be easily performed. In general, in the feeding, the winding drum is made free to rotate, and the cable is fed out by pulling the submerged investigation device, and the winding drum is rotated and wound only during winding.

  In the cable feeding mechanism to the submerged inspection device, the transmission of at least one of data or power between the cable connected to the submerged inspection device side and the cable connected to the control and monitoring device side is slipped. If it is configured to use a ring, it is possible to prevent the rotation of the cable on the liquid inspection device side from affecting the cable on the device side with a relatively simple configuration. Can be solved.

  In the above-described cable feeding mechanism to the in-liquid investigation device, if the rotation driving device of the winding drum is provided outside the liquid sealing portion, the liquid tightness is performed at the rotating shaft portion of the winding drum, etc. Further, by placing a rotary drive device such as a motor driven by compressed air outside the liquid seal portion, it is not necessary to make the rotary drive device a liquid-tight structure.

  In the above-described cable feeding mechanism to the submerged investigation device, if the submerged investigation device is configured to be an in-pipe investigation device that investigates the inside of a water pipe inserted from a branch pipe into a main pipe, In the in-pipe investigation of the water pipe, the feeding mechanism of the device can exert a remarkable effect particularly in the investigation of the water pipe since the liquid pressure at the time of liquid sealing becomes 1 MPa (gauge pressure).

  And, the cable feeding method to the submerged investigation device to achieve the above-mentioned purpose is to connect the submerged investigation device to be investigated in the liquid seal state and the control and monitoring device placed outside the liquid seal part. In the method of feeding a cable to a submerged survey device that performs feeding and winding of the cable to be fed, the cable connected to the submerged survey device is fed and wound by a winding drum provided in the liquid seal portion. It is the method characterized by this.

  According to this method, it is possible to avoid the insertion and removal of the cable at the penetration portion between the liquid portion and the outside, so that the liquid-tight structure of the penetration portion is simplified, and the rotation of the winding drum in the liquid causes the liquid Fine adjustment of the feeding and winding force of the cable to the middle investigation device is not necessary, and the feeding and winding can be easily performed, so that the feeding and winding can be easily automated. Generally, in the feeding, the winding drum is made free to rotate, the cable is fed by the progress of the submerged investigation device, and the winding drum is rotated only during winding.

  In the cable feeding method to the submerged inspection device, at least one of data or power between the cable connected to the submerged inspection device side and the cable connected to the control and monitoring device side is a slip ring. introduce. According to this method, the rotation of the cable on the submerged inspection device side can be prevented from being transmitted to the cable on the device side relatively easily, and the problem of twisting of the cable due to the rotation of the winding drum can be solved. .

  In the cable feeding method to the submerged investigation device, the cable is wound by rotating and driving a rotation driving device in which the winding drum is provided outside the liquid seal portion. According to this method, since a rotary drive device such as an electric motor or a motor driven by compressed air is placed outside the liquid seal portion, liquid tightness may be performed at the rotary shaft portion of the take-up drum, etc. There is no need for a liquid-tight structure.

  In the above-described method of feeding the cable to the submerged investigation device, the inside of the water pipe inserted into the main pipe from the branch pipe is investigated with the submerged investigation device. According to this method, the feeding mechanism of the in-liquid investigation device can be particularly effective in the in-pipe investigation of water pipes where the liquid pressure at the time of liquid sealing becomes 1 MPa and liquid sealing is difficult.

  In addition, the survey target of water pipes is not only connected to water mains (distribution mains of water supply) of about 500 mmφ to 1000 mmφ and water pressure of about 1 MPa, but also directly connected to general users of about 200 mmφ and water pressure of about 0.3 MPa. The piping etc. which are are included. In addition, the water main here refers to the pipe between the water supply source (water purification plant, etc.) and the user, and the branch pipe is a pipe that branches upward from the main pipe. A pipe to which an air valve, a digestive plug, etc. are attached.

  According to the cable feeding mechanism to the submerged investigation device and the cable feeding method to the submerged investigation device of the present invention, the take-up drum for feeding and winding the cable connected to the submerged investigation device is provided with a liquid-sealed portion. By providing the inside of the cable, it is possible to avoid taking in and out of the cable in the through portion between the liquid portion and the outside. Therefore, the liquid-tight structure of the penetrating portion can be simplified. Further, by rotating the winding drum in the liquid, it is possible to easily feed and wind the cable to the in-liquid investigation device.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a cable feeding mechanism to a submerged investigation device and a cable feeding method to a submerged investigation device according to the present invention will be described with reference to the drawings. Here, the description will be made by taking the survey of the water main as an example, but the present invention is not limited to this, and the in-liquid investigation device to be investigated in other liquid seal state and the device placed outside the liquid seal portion It can be applied to a cable feeding mechanism to a submerged inspection device that performs a part of a cable connecting and winding, and a cable feeding method to a submerged inspection device.

First, the water pipe inspection system 1 in which the cable feeding mechanism to the submerged investigation device and the cable feeding method to the submerged investigation device are used will be described. As shown in FIG. 1, the internal situation and corrosion of the water main 10 are detected by using an in-pipe inspection device 20 that is an underwater inspection robot over a long distance of about 300 m to 1000 m without shutting off the water main 10. This is a system for inspecting the situation and the displacement of the joint 11 part. This system 1 includes an in-pipe investigation device 20 which is an in-liquid investigation device, an insertion / recovery device 30 for inserting the in-pipe investigation device 20 into the water main pipe 10, transmission / reception of video data and control data, and power transmission. Cables 41, 42, 43, 44, an in-pipe investigation device 20, and an insertion and recovery device 30 including a control and monitoring device 50 for operating, controlling, monitoring, recording, and the like .

  Transmission / reception of control signals, power, data, and the like with the in-pipe inspection device 20 is performed via the first connection cable 41 and the first underwater cable 42, and transmission / reception of control signals and power with the insertion / recovery device 30 is second. The connection cable 43 and the second underwater cable 44 are used. These cables 41, 42, 43, and 44 are formed of composite cables of electric signals and electric power.

  As shown in FIG. 1 to FIG. 3, the insertion and recovery device 30 inserts the pipe inspection device 20 into the water main pipe 10 and sends it out without stopping the water supply, that is, without stopping the water supply. This is a device for collecting the in-pipe inspection device 20 after the inspection. This insertion and recovery device 30 is composed of an insertion pipe 31 and a take-up drum storage member 32 connected to the upper part thereof, and the lower part of the insertion pipe 31 is attached to and detached from the repair valve 14 at the branch portion of the water main pipe 10. The lower flange 31a is formed so that the upper portion is formed, and the upper portion is formed with an upper flange 31b connected to the take-up drum storage member 32. Further, a drain cock 31c and a viewing window 31d (transparent acrylic plate) are provided on the lower side of the insertion tube 31. The viewing window 31d is provided at a position where the rear portion of the storage member 34 can be confirmed when the storage member 34 that houses the in-pipe inspection device 20 is pulled up. After confirming the rear part of the storage member 34 from the viewing window 31d, the repair valve 14 is closed to prevent the storage member 34 from being pinched by the repair valve 14 and being damaged.

  The take-up drum storage member 32 includes a first case 32a having a watertight (liquid tight) section and a second case 32b having a non-watertight section that can withstand the water pressure of the water main pipe 10, and further includes a first case 32b. A rod insertion portion 32c through which the insertion rod 36 having a lever 36a enters and exits and a second waterproof connector 32d serving as a connection portion between the second connection cable 43 and the second underwater cable 44 are provided on the upper portion of the case 32a. A guide roller 32e for guiding the first underwater cable 42 is provided at the lower portion of 32a.

  The insertion rod 36 moves the storage member 34 from the insertion pipe 31 into the water main pipe 10, and conversely moves the storage member 34 up and down to move from the water main pipe 10 to the insertion pipe 31. It is a rod and is configured to move up and down.

  Further, the take-up drum storage member 32 is provided with a take-up drum 33 for feeding and taking up the first underwater cable 42. The winding drum 33 rotates the cable drum 33a provided inside the first case 32a in the watertight compartment by the rotation of the rotating shaft 33c by the winding motor 33b inside the second case 32b in the non-watertight compartment. The first underwater cable 42 is wound up while the guide roller 33e of the cable shifter 33d is moved laterally in synchronization with the rotation of the cable drum 33a. Moreover, the rotation of the cable drum 33a is made free so that the first underwater cable 42 is fed out according to the movement of the in-pipe inspection device 20. Further, rotation of the cable drum 33a is detected by a rotation meter 33f formed by a rotating plate and an encoder and used for control. The electric signal and power from the first underwater cable 42 are guided to the first connector 33h via the slip ring 33g.

  With these configurations, the cable drum 33a, the cable shifter 33d, and the guide roller 33e are housed in the first case 32a in the watertight compartment, while the winding motor 33b, the rotation meter 33f, the slip ring 33g, and the like are in the non-watertight compartment. It is provided in the second case 32b and is watertight at the rotating shaft portion 33c of the cable drum 33a. The water-tight mechanism at the rotating shaft portion 33c is a well-known technique and can be easily formed as compared with the water-tight mechanism at the portion where the cable enters and exits as in the prior art.

  In addition, a storage member 34 for storing the in-pipe inspection device 20 is disposed in the insertion tube 31 of the insertion and recovery device 30, and a supply roller 34 a for supplying the first underwater cable 42 is provided behind the storage member 34. Is provided. The feed roller 34a is rotationally driven via a flexible joint 35b from a feed roller motor 35a provided at the distal end portion 35 of the insertion rod. The flexible joint 35b is a shaft joint capable of transmitting a rotational force even when the directions of the input side and output side shafts are changed. For example, the flexible joint 35b includes a wire, a spring, and the like housed in a sheath tube.

  A second underwater cable 44 is provided for transmission of a control signal and power to the feed roller motor 35a. The second underwater cable 44 feeds the second waterproof connector 32d and the insertion rod tip 35. The roller motor 35a is connected. The second underwater cable 44 is formed of a curl cord or the like so as to expand and contract as the insertion rod tip 35 moves up and down.

  The storage member 34 is connected at its rear part to the insertion rod tip 35 with a cable bear 34b which is a bending member. The insertion rod tip 35 is fixed to the lower end of the insertion rod 36 and Along with the movement, the inside of the insertion tube 31 is moved up and down. When the insertion rod 36 is at the upper end, as shown in FIGS. 2 and 3, the storage member 34 is inside the insertion tube 31 in the state in which the in-pipe inspection device 20 is stored therein, and the distal end of the insertion rod Part 35 is also on it. On the other hand, when the insertion rod 36 is at the lower end, as shown in FIG. 1, the storage member 34 is pushed out of the insertion pipe 31 and is in the water main pipe 10, and the insertion rod tip 35 is at the lower end of the insertion pipe 31. Inside the side.

  The cable bear 34b that connects the insertion rod tip 35 and the storage member 34 is a bending member so that the storage member 34 can face both the tube axis direction of the insertion tube 31 and the tube axis direction of the water main pipe 10. It is a part to make and has a plurality of joints. This joint is configured such that joint element members on both sides are connected by a pin coupling portion, and adjacent joint element members can relatively rotate by a predetermined angle around the pin coupling portion. By forming the cable bear 34b with a joint, the bending direction and the shape before and after the bending can be fixed, so that the shaking and vibration are reduced when the storage member 34 is moved. Further, by providing a plurality of joints, the bending member can be bent smoothly, and even when the flow in the water main pipe 10 is large, the bending member can be easily bent and can easily return to a straight state.

  As shown in FIGS. 4 to 7, the in-pipe investigation device (underwater investigation robot) 20 includes a main body 21 equipped with a rear movement thruster 22 and a front posture stabilization fin 23, and further includes a front part. In addition, a total of three buoyancy adjusting devices 24 are provided at the rear part. Moreover, the observation camera 25 which faced the side and the LED illumination light 26 for cameras are provided, and the inner wall and the joint 11 of the water main 10 are observed. The observation camera 25 can change the field of view by the camera turning device 27.

  This in-pipe investigation device 20 is put into the water main pipe 10 after the weight is adjusted to neutral buoyancy that does not float and sink in water. Control signals for the motor 28, the buoyancy adjusting device 24, the camera turning device 27, etc., which are the power source of the thruster 22 of the in-pipe inspection device 20, and the signals of power and data obtained by the observation camera 25 are displayed at the rear. It transmits / receives with the 1st underwater cable 42 connected. One end side of the first underwater cable 42 is connected to the rear part of the in-pipe inspection device 20, but the other end side is connected to the slip ring 33 g and wound around the cable drum 33 a of the winding drum 33. It is done.

  Since the first underwater cable 42 is connected to the in-pipe inspection device 20, the specific gravity is adjusted so as to have a neutral buoyancy that does not rise and fall. However, if the water pressure is high, the first underwater cable 42 is compressed and the specific gravity changes, so that ups and downs and trimming (back and forth inclination) of the in-pipe inspection device 20 occur. This change is dealt with by moving the floating body in and out of the main body with the buoyancy adjusting device 24 to change the buoyancy position by increasing or decreasing the buoyancy of the part, thereby adjusting the buoyancy and posture.

  As shown in FIG. 1, the control and monitoring device 50 controls a control device 51, a TV monitor 52, a video recording device 53, a power control device 54, and the like that control and control the in-pipe inspection device 20 and the insertion and collection device 30. An apparatus rack 55 is provided. The control device 51 is configured to be operated by an operator by wire or wireless.

  The first connection cable 41 connects an atmospheric portion between the control and monitoring device 50 and the first connector 33 h that is a signal extraction portion of the take-up drum of the insertion and recovery device 30. Further, the control and monitoring device 50 is connected to the second waterproof connector 32d of the insertion and recovery device 30 with the second connection cable 43, and the control signal to the feeding roller motor 35a is connected via the second underwater cable 44. Transmit power.

  Next, an operation method of the water pipe inspection system 1 will be described. As shown in FIG. 1, when checking the water main 10, the manhole cover 13 is removed, the repair valve 14 is closed, and then a fire hydrant or an air valve (not shown) installed in the manhole 12 is removed. And the insertion and collection | recovery apparatus 30 is attached on the repair valve 14, and the repair valve 14 is opened.

  Thereafter, the insertion rod 36 is pushed down, and the in-pipe inspection device 20 is sent out from the insertion pipe 31 of the insertion and recovery device 30 into the water pipe main 10. When the storage member 34 inserted into the insertion pipe 31 is inserted into the water main 10 with the in-pipe inspection device 20 stored therein, the storage member 34 is caused by the water flow in the water main 10. The water is directed in the direction of the water flow and is substantially parallel to the water flow. In this state, the cable bear 34b that connects between the storage member 34 and the insertion rod tip 35 is bent at a substantially right angle. When there is no water flow, the cable bear 34b is forcibly bent.

  When the storage member 34 becomes substantially parallel to the water flow, the feeding roller 34a is rotationally driven by the feeding roller motor 35a, and the first underwater cable 42 is fed out. At this time, the rotation of the cable drum 33a is made free. When the water flow is large, the in-pipe inspection device 20 is flown to reach a position corresponding to the feed amount of the first submersible cable 42, and when the water flow is small, the thruster 22 is rotated by the motor 28 to generate a propulsive force. This propulsive force reaches a position corresponding to the feed amount of the first underwater cable 42.

  The in-pipe investigation device 20 is moved to an arbitrary investigation position of the water main 10 by the amount of feeding of the first underwater cable 42, and the inner wall of the water main 10, the joint 11, etc. are controlled by the camera turning device 27. The image is taken with the observation camera 25 under the illumination of the LED lamp 26 while changing the above. On the ground, an operator operates the in-pipe investigation device 20 while watching the inside of the water main 10 with the TV monitor 52 of the control and monitoring device 50 installed on the ground through the first underwater cable 42 and the first connection cable 41, and images. Record. Moreover, ascending / descending and posture control are performed using the buoyancy adjusting device 24 as necessary.

  When the survey is completed, the winding motor 33b is driven to rotate the cable drum 33a and wind up the first underwater cable 42. At the time of winding, if necessary, the feeding roller 34a is reversely rotated to promote winding. By this winding, the in-pipe inspection device 20 connected to the tip of the first underwater cable 42 is pulled and stored in the storage member 34. At the time of storing, the rotation of the cable drum 33a is stopped.

  Thereafter, while rotating the cable drum 33 a, the insertion rod 36 is raised, and the storage member 34 storing the in-pipe inspection device 20 is drawn into the insertion tube 31. At this time, the cable bear 34b, which is a bending member, becomes straight from the bent state and is drawn into the insertion tube 31. When the insertion rod 36 reaches the upper end, the storage member 34 is completely in the insertion tube 31, so the repair valve 14 is closed, the drain cock 31 c is opened, and the insertion and recovery device 30 After draining the water, the insertion and collection device 30 is removed. Then, after installing a fire hydrant or an air valve (not shown), the repair valve 14 is restored. Thereafter, the manhole cover 13 is closed to complete the investigation.

  According to the cable feeding mechanism to the submerged investigation device and the cable feeding method to the submerged investigation device in the water pipe inspection system 1 described above, the first submerged cable 42 connected to the submerged investigation device 20 is fed and wound. By providing the take-up drum 33 that performs the take-up inside the liquid-sealed portion 32a, it is possible to avoid taking in and out the first underwater cable 42 at the through portion between the liquid portion and the outside. Therefore, the liquid-tight structure of the penetration part 33c can be simplified. Further, by rotating the take-up drum 33 in the liquid, the unwinding and winding of the first underwater cable 42 to the submerged investigation device 20 can be easily performed without being affected by the water pressure without being affected by the water pressure. It can be carried out.

It is a figure which shows the structure of the inspection system in a water pipe using the cable drawing | feeding-out mechanism to the submerged investigation apparatus and the cable feeding method to the submerged investigation apparatus in embodiment of this invention. It is front sectional drawing which shows the structure of the insertion and collection | recovery apparatus which shows the cable drawing | feeding-out mechanism to the submerged investigation apparatus. It is a sectional side view which shows the structure of the insertion and collection | recovery apparatus which shows the cable drawing | feeding-out mechanism to the investigation apparatus in liquid. It is a side view of in-pipe investigation equipment. It is a top view of in-pipe investigation equipment. It is a front view of in-pipe investigation equipment. It is a rear view of an in-pipe investigation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inspection system in water pipe 10 Water supply main pipe 14 Repair valve 20 In-pipe investigation apparatus 30 Insertion and collection | recovery apparatus 31 Insertion pipe 32 Winding drum storage member 32a 1st case of watertight division 32b 2nd case of non-watertight division 33 Winding drum 33a Cable drum 33b Winding motor 33c Rotating shaft 33g Slip ring 41 First connection cable 42 First underwater cable 43 Second connection cable 44 Second underwater cable 50 Control and monitoring device

Claims (8)

  In the cable feeding mechanism to the submerged inspection device for feeding and winding the cable connecting the submerged investigation device to be investigated in the liquid sealing state and the control and monitoring device placed outside the liquid sealing part, A cable feeding mechanism to a submerged investigation device, wherein a take-up drum for feeding and winding the cable connected to the submerged investigation device side is provided in the liquid sealing portion.   2. The transmission of at least one of data or power between the cable connected to the submerged inspection device side and the cable connected to the control and monitoring device side is performed by a slip ring. Cable feeding mechanism to submerged investigation equipment.   The cable feeding mechanism to the in-liquid investigation device according to claim 1, wherein a rotation driving device for the winding drum is provided outside the liquid sealing portion.   The cable to the submerged investigation device according to claim 1, 2 or 3, wherein the submerged investigation device is an in-pipe investigation device that investigates the inside of a water pipe inserted from a branch pipe into a main pipe. Feeding mechanism.   In the method of feeding out the cable to the submerged inspection device for feeding and winding the cable connecting the submerged investigation device to be investigated in the liquid seal state and the control and monitoring device placed outside the liquid seal part, A method of feeding a cable to a submerged survey instrument, wherein the cable connected to the submerged survey instrument side is fed and wound by a winding drum provided in a liquid seal portion.   6. The liquid according to claim 5, wherein at least one of data and power between the cable connected to the submerged investigation device side and the cable connected to the control and monitoring device side is transmitted by a slip ring. Cable feeding method to medium survey equipment.   The method of feeding a cable to a submerged inspection device according to claim 5 or 6, wherein a cable is wound by rotating a rotary drive device provided with the winding drum outside the liquid seal portion. .   8. The method of feeding a cable to a submerged investigation device according to claim 5, 6 or 7, wherein the submerged investigation instrument investigates the inside of a water pipe inserted from a branch pipe into a main pipe.

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