JP4937593B2 - Piping inspection device and piping inspection method - Google Patents

Description

The present invention has an inner diameter smaller relates piping inspection apparatus and piping inspection methods Ru is used for inspection of pipes with many bends.

  For example, structures buried in the ground include a tunnel (hereinafter referred to as a “tunnel”) that accommodates lifeline facilities such as electricity, communication, and gas and that can be accommodated by a person. Such a tunnel is provided with a storage facility for storing infiltrating groundwater. The groundwater stored in the storage facility is drained into a sewer pipe through a drain pipe buried in the ground when a predetermined water level is exceeded.

By the way, the drainage pipe may not be able to perform a sufficient drainage function due to aged deterioration. Therefore, it is necessary for the manager of the drainage pipe to periodically perform the inspection work of the drainage pipe. However, since the inner diameter of the drain pipe is very thin, it is impossible for an operator to enter the drain pipe for inspection work. Therefore, in the current inspection work, the inspection camera is inserted into the drain pipe, and the drain pipe is photographed from the inside while propelling the inspection camera (see, for example, Patent Document 1).
JP-A-10-191522

  By the way, since the cable used in the conventional inspection camera was used as a push-in means for propelling the camera head, the rigidity is set to be relatively high, and it can be freely bent according to the shape of the bent portion. Can not do it. For this reason, when the drain pipe is provided with a large number of bent portions, it is difficult to propel the inspection camera, the efficiency of the inspection work may be reduced, and further, the inspection work itself may be impossible.

The present invention has many bends, the worker is possible to provide a piping inspection apparatus and pipe inspection methods Ru can be efficiently carried out inspection of a thin pipe which can not enter.

Piping inspection device that put the present invention, the pipe inspection method is configured as follows.

(1) The pipe inspection device is formed in a spherical shape having an outer diameter smaller than the inner diameter of the pipe to be inserted, and is connected to the camera head for photographing the pipe from the inside and the opposite side to the photographing side of the camera head. A cable that covers the cable and is freely curved according to the shape of the pipe, and is connected to the pipe on the side from which the cable is drawn, and the pipe in which the camera head is inserted An airflow forming means for forming a spiral airflow and propelling the camera head along the pipe .

(2) In the pipe inspection apparatus described in (1), the outer material has a lower coefficient of friction with respect to the pipe than the outer material of the cable.

(3) In the piping inspection device described in (1), the material of the exterior is a steel material.

(5) In the pipe inspection device described in ( 1 ), the airflow forming unit combines a plurality of airflows formed by the compression unit and a compression unit that compresses air to form a plurality of airflows. And a synthesizing means for supplying the pipe into the pipe.

(6) The pipe inspection method is formed in a spherical shape having an outer diameter smaller than the inner diameter of the pipe to be inserted, and is connected to the camera head for photographing the pipe from the inside; A cable that covers the cable and curves freely according to the shape of the pipe; and is connected to the pipe on the side from which the cable is drawn, and the pipe in which the camera head is inserted A pipe inspection device comprising: airflow forming means for forming a spiral airflow and propelling the camera head along the pipe. Then, a step of inserting the camera head in the pipe having a plurality of bends, forming the airflow vortex in the pipe, while promoting the camera head within the pipe, the pipe from the inside It is provided with a step of photographing.

(7) In the pipe inspection method described in (6), the cable of the inspection camera is covered with a flexible exterior and is dragged by the camera head when the camera head is propelled. It moves in the pipe and bends freely according to the shape of the pipe.

(8) In the pipe inspection method described in (6), the outer material has a lower coefficient of friction with respect to the pipe than the outer material of the cable.

(9) In the pipe inspection method described in (8), the material of the exterior is a steel material.

(10) The pipe inspection method is formed in a spherical shape having an outer diameter smaller than the inner diameter of the pipe to be inserted, and is connected to the camera head for photographing the pipe from the inside; A cable that covers the cable and curves freely according to the shape of the pipe; and is connected to the pipe on the side from which the cable is drawn, and the pipe in which the camera head is inserted A pipe inspection device comprising: airflow forming means for forming a spiral airflow and propelling the camera head along the pipe. Then, by inserting the wire from the first opening of the pipe, a step of projecting the wire from the second opening opposite the first opening, projecting from the second opening before Symbol pipe the the end of the wire, the step of connecting said cable with the pipe outer, with the previous SL pulling the wire protruding from the first opening, inserting the cable into the pipe from the second opening, the from the first opening of the pipe comprising the steps of: projecting the cable, pulling the cable that protrudes from the first opening, while moving the mosquitoes Meraheddo, and comprises a step of photographing the pipe from the inside Yes.

(11) In the pipe inspection method described in (10), before moving the camera head in the pipe, in the cable inserted into the pipe, the part protruding from the first opening of the pipe And a step of connecting a measuring device arranged outside the pipe.

(12) In the pipe inspection method described in (10), when the camera head is caught in the pipe, a portion protruding from the second opening of the pipe in a pullback wire connected to the camera head And further pulling back the camera head.

(13) In the pipe inspection method described in (10), the first opening is located higher than the second opening.

(14) In the pipe inspection method described in (10), the cable is covered with a flexible exterior and is freely bent according to the shape of the pipe when the camera head is moved.

(15) In the pipe inspection method described in (10), the outer material has a lower coefficient of friction with respect to the pipe than the outer material of the cable.

(16) In the pipe inspection method described in (10), the material of the exterior is a steel material.

  According to the present invention, it is possible to easily carry out an inspection work for a thin pipe having a large number of bent portions and which an operator cannot enter.

  Hereinafter, the first to third embodiments will be described with reference to the drawings.

(First embodiment)
First, the first embodiment will be described with reference to FIGS.

  FIG. 1 is a schematic diagram for explaining an inspection operation of the drain pipe F in the first embodiment of the present invention. In FIG. 1, symbol A is a tunnel, symbol B is a special cutting part, symbol C is a storage part, symbol D is a manhole, symbol E is a drainage pump, symbol F is a drain pipe, symbol G is a sewer, symbol I is drainage Shows a spear.

  As shown in FIG. 1, the tunnel A is buried in the ground and connected to the special cutting part B at every predetermined interval. The tunnel A is inclined so as to become lower as it approaches the special cutting part B. Therefore, the groundwater that has entered the tunnel A flows down to the special cutting section B. The manhole D is disposed immediately above the special cutting part B, and connects the ground and the special cutting part B. The storage part C stores the groundwater flowing down from the tunnel A, and a drainage pump E is disposed therein. When the groundwater stored in the storage part C exceeds a predetermined water level, the drainage pump E starts to suck up the groundwater. The drainage pipe F connects the drainage pump E and the drainage basin I, and guides the groundwater sucked up by the drainage pump E to the drainage basin I. The drainage basin I is open to the ground and can be accessed by an operator who stands by on the ground. Usually, the drainage pipe F has many bent parts to detour various buried objects buried in the ground, but is arranged almost vertically in the special cutting part B where there is no detour object. . In addition, although the notch L exists in the drain pipe F in FIG. 1, this is formed for the inspection work of the drain pipe F, and does not exist normally.

  In the present embodiment, the inspection camera 10, the measurement device 20, the compressor 30, and the connection jig 40 are used for the inspection of the drain pipe F described above. Hereinafter, these configurations will be described.

  FIG. 2 is a schematic view of the inspection camera 10 in the same embodiment. As shown in FIG. 2, the inspection camera 10 includes a camera head 11, a cable 12, and a hook 13.

  The camera head 11 is formed in an almost spherical shape, and a CCD camera 11a and a plurality of LED lamps 11b are disposed on the back side of the portion to which the cable 12 is connected. The CCD camera 11a is a so-called wide-angle camera, and can photograph the inner wall of the drainage pipe F in a state of being disposed in the drainage pipe F. The LED lamps 11b are arranged at equal intervals so as to surround the CCD camera 11a, and illuminate the imaging region of the CCD camera 11a. The outer diameter of the camera head 11 is slightly smaller than the inner diameter of the drain pipe F. Therefore, the camera head 11 can freely move in the drain pipe F.

  The cable 12 includes a cable body 121 and an exterior 122. The cable main body 121 is connected to the CCD camera 11a, and a connector 123 connected to the connection panel 21 of the measuring apparatus 20 is attached to an end opposite to the CCD camera 11a.

  FIG. 3 is a schematic view of the cable 12 in the embodiment. As shown in FIG. 3, the cable body 121 is flexible enough to bend freely, and the coaxial cable 121a for communication of the CCD camera 11a and various control devices arranged around the coaxial cable 121a. A metal cable 121b and an outer skin 121c covering these cables 121a and 121b are provided. As the material of the outer skin 121c, rubber excellent in waterproofness is used.

  The exterior 122 covers the cable body 121 in a net shape and reinforces the cable body 121 that is weak against tension. As the material of the exterior 122, a steel material (stainless steel or the like) that has flexibility enough to bend freely with the cable body 121 and that has a lower coefficient of friction with respect to the drain pipe F than the outer skin 121c of the cable body 121 is used. Is done.

  The hook 13 is a portion to which a pullback wire (used in the third embodiment) 60 is connected, and is attached to the camera head 11 by three wires 13a connected around the CCD camera 11a. .

  FIG. 4 is a schematic view of the measuring apparatus 20 in the same embodiment. As shown in FIG. 4, the measurement apparatus 20 is installed on the ground and includes a connection panel 21, a monitor 22, and a digital video 23. The connection panel 21 is a portion to which the connector 123 of the cable 12 is connected, and takes in image data from the CCD camera 11a. The monitor 22 displays the state of the drainage pipe F as a video based on the image data captured from the connection panel 21. The digital video 23 records image data captured from the connection panel 21.

  FIG. 5 is a schematic view of the compressor 30 in the same embodiment. As shown in FIG. 5, the compressor 30 is arrange | positioned on the ground, takes in the surrounding air, and compresses it to a high voltage | pressure. The compressor 30 includes two discharge ports 31 that discharge compressed air, and an air hose H is connected to each discharge port 31.

  FIG. 6 is a schematic view of the connection jig 40 in the same embodiment. As shown in FIG. 6, the connection jig 40 includes a main pipe 41, two sub-pipes 42, a connection pipe 43, and a soundproof lid 44, and is disposed in the drainage basin I. The connection jig 40 is connected to a drain pipe F that opens to the side wall of the drainage basin I, and is pressed against the side wall of the drainage basin I by a jig or an airbag.

  The main pipe 41 is arranged almost vertically, and its upper end functions as an insertion port for inserting the camera head 11 of the inspection camera 10. The sub-pipe 42 extends obliquely upward from the peripheral wall of the main pipe 41, and an air hose H is connected to each upper end. The connecting pipe 43 is connected to the lower end of the main pipe 41 and is connected to a drain pipe F that opens to the side wall of the drainage basin I. The soundproof lid 44 is fitted into the upper end of the main pipe 41 and prevents noise caused by air from leaking outside the connection jig 40. The soundproof lid 44 is composed of two pieces, and a hole portion p1 for inserting the cable 12 is formed at the center thereof. The inner diameter of the hole p1 is slightly larger than the outer diameter of the cable 12. As a result, when the compressor 30 is started, a so-called suction effect appears in which the cable 12 is sucked into the main pipe 41 in the vicinity of the hole p1.

(Inspection work of drain pipe F)
The inspection work of the drain pipe F will be described with reference to FIG.
In the inspection work of the drainage pipe F, first, the drainage pipe F is cut at two locations on the upper and lower sides inside the special cutting part B, and a notch L is formed in the drainage pipe F. The notch L functions as a passage for air supplied from the compressor 30.

  In a separate process, the connection jig 40 is vertically disposed in the drainage basin I, and the drainage pipe F and the connection pipe 43 are connected. At this time, the connecting pipe 43 is pressed against the side wall of the drainage basin I by a jig or an airbag. Thereby, the air from the connection pipe 43 is supplied to the drain pipe F with almost no leakage.

  Next, the air hoses H are connected to the upper ends of the two sub pipes 42, respectively. The air hose H is connected to the discharge port 31 of the compressor 30 installed on the ground by prior work.

  When the above operation is completed, the compressor 30 is started and air is supplied from the air hose H to the sub pipe 42. Then, in the drain pipe F, an intense spiral airflow from the drainage basin I toward the special cutting part B is formed. Thereby, the groundwater remaining in the hanging part of the drainage pipe F is blown off, and the groundwater is almost removed from the drainage pipe F. The removed groundwater is discharged into the storage section C after being blown out to the special cutting section B.

  Then, when an air flow from the drainage basin I to the special cutting section B is formed in the drain pipe F, the CCD camera 11a of the inspection camera 10 is activated, the camera head 11 is inserted from the upper end of the main pipe 41, and the main A soundproof lid 44 is fitted into the upper end of the pipe 41. At this time, an intense spiral airflow from the drainage basin I to the special cutting part B is formed in the drainage pipe F as described above. For this reason, the camera head 11 inserted into the drain pipe F by an operator waiting on the ground pushes the cable 12 in the direction indicated by the arrow a. As a result, the CCD camera 11a takes a picture of the drainage pipe F from the inside from the drainage basin I to the special cutting part B while moving together with the camera head 11. Image data acquired by photographing is transmitted to the measuring device 20 installed on the ground through the cable body 121, recorded by the digital video 23, and displayed on the monitor 22 as an image. Thereby, the worker standing by on the ground can check the state of the drain pipe F. Moreover, a person who does not attend the inspection work of the drain pipe F can also check the state of the drain pipe F based on the image data recorded in the digital video 23.

  When the camera head 11 of the inspection camera 10 reaches the sewer G, the supply of air by the compressor 30 is stopped. Then, the worker waiting on the ground pulls the cable 12 of the inspection camera 10 in the direction indicated by the arrow b, and removes the inspection camera 10 from the drain pipe F. Note that while the inspection camera 10 is removed, the CCD camera 11 a continues to shoot and the state of the drain pipe F is recorded in the digital video 23. Thus, the inspection work for the drain pipe F is completed.

(Operation by this embodiment)
In this embodiment, the camera head 11 of the inspection camera 10 is inserted into the drainage pipe F from the drainage basin I and drained from the drainage basin I to the special cutting part B while being propelled by the airflow formed in the drainage pipe F. Photograph tube F from inside. Therefore, the inspection work of the drain pipe F becomes very easy.

  Moreover, the drainage basin I is disposed at a position higher than the special cutting portion B. Therefore, since the gravity of the camera head 11 itself can be used when the camera head 11 is propelled, smooth propulsion is possible.

  Furthermore, even if groundwater or the like remains in the drooping portion of the drainage pipe F, almost all the groundwater is removed from the drainage pipe F by the airflow formed in the drainage pipe F before the drainage pipe F is photographed. . Therefore, the shooting of the drain pipe F is not disturbed by the groundwater, and as a result, the image displayed on the monitor 22b becomes very clear. This greatly improves the inspection accuracy of the drain pipe F.

  In the present embodiment, the outer sheath 122 of the cable 12 is formed of a steel material (stainless steel or the like) that can be freely bent according to the shape of the bent portion of the drain pipe F. Therefore, when the camera head 11 is propelled in the drain pipe F, the movement of the cable 12 is not suppressed at the bent portion of the drain pipe F. Thereby, even if the drain pipe F has many bent parts, the camera head 11 can smoothly promote the inside of the drain pipe F. In the experiment by the inventor, it has been confirmed that the camera head 11 can be smoothly promoted even with a drain pipe having six bent portions.

  Moreover, since the steel material (stainless steel or the like) that is the material of the exterior 122 has a smaller coefficient of friction with respect to the drain pipe F than the outer skin 121c of the cable 12, the camera head 11 is propelled by friction between the exterior 122 and the drain pipe F. Will not be disturbed.

  In the present embodiment, the connecting jig 40 mixes two systems of air supplied from the two sub pipes 42 to form an air flow in the drain pipe F. Therefore, since the airflow formed in the drain pipe F becomes a strong spiral, the camera head 11 inserted into the drain pipe F smoothly promotes.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. Here, the description of the same configuration and operation as in the first embodiment will be omitted.
FIG. 7 is a schematic view for explaining the inspection work of the drain pipe F in the second embodiment of the present invention. As shown in FIG. 7, the drainage pipe F in the present embodiment is connected to the sewer G without being connected to the drainage basin I. That is, the worker who stands by on the ground cannot access the drain pipe F. Therefore, when the drainage pipe F is not connected to the drainage basin I as in this embodiment, the camera head 11 of the inspection camera 10 is inserted into the drainage pipe F from the special cutting part B.

  FIG. 8 is a schematic view of a connection jig 40A in the same embodiment. As shown in FIG. 8, the connecting jig 40 </ b> A according to the present embodiment is arranged in a notch K formed in the drain pipe F in the special cutting part B, and the special cutting part from the top wall of the special cutting part B. It is connected to the lower end of the drain pipe F protruding into B. Therefore, the connection jig 40A includes one main pipe 41A, two sub pipes 42A, and a soundproof lid 44A. However, unlike the connection jig 40 in the first embodiment, the connection pipe 40A 43 is not provided.

  The main pipe 41A is arranged almost vertically. The upper end of the main pipe 41A is connected to the lower end of the drain pipe F protruding from the special cutting part B. The lower end of the main pipe 41A is open and functions as an insertion port for inserting the camera head 11 of the inspection camera 10. The sub pipe 42A extends obliquely downward from the peripheral wall of the main pipe 41A, and an air hose H is connected to each lower end. The soundproof lid 44A is fitted into the lower end of the main pipe 41A, and prevents noise caused by air from leaking from the connection jig 40A. The soundproof lid 44A is composed of two pieces, and a hole portion p2 for inserting the cable 12 is formed at the center thereof. The inner diameter of the hole p <b> 2 is slightly larger than the outer diameter of the cable 12. As a result, when the compressor 30 is started, a so-called suction effect appears in which the cable 12 is sucked into the main pipe 41A in the vicinity of the hole p2.

(Inspection work of drain pipe F)
The inspection work of the drain pipe F will be described with reference to FIG.
In the inspection work of the drainage pipe F in the present embodiment, first, the drainage pipe F is cut at two upper and lower positions inside the special cutting part B, and the notch K is formed in the drainage pipe F. Next, the connecting jig 40A is vertically arranged in the notch K formed in the drain pipe F, and the main pipe is connected to the lower end of the drain pipe F protruding from the top wall of the special cut section B into the special cut section B. The upper end of 41A is connected. Thereby, the connecting jig 40A is fixed to the drain pipe F.

  Next, two air hoses H are introduced from the manhole D into the special cutting part B, and are respectively connected to the lower end of the sub pipe 42A. The air hose H is connected to the discharge port 31 of the compressor 30 installed on the ground by prior work.

  Further, the inspection camera 10 is carried from the manhole D into the special cutting part B in a separate process. The connector 123 of the inspection camera 10 is connected to the connection panel 21 of the measuring device 20 installed in the special cutting section B by a prior work.

  When the above operation is completed, the compressor 30 is started and air is supplied from the air hose H to the sub pipe 42A. Then, in the drain pipe F, an intense spiral airflow from the special cutting part B to the sewer G is formed. Thereby, the groundwater remaining in the hanging part of the drainage pipe F is blown off, and the groundwater is almost removed from the drainage pipe F. The removed groundwater is drained into the sewer G.

  When the groundwater is removed from the drain pipe F, the CCD camera 11a of the inspection camera 10 is activated, the camera head 11 is inserted from the lower end of the main pipe 41A, and the soundproof lid 44A is fitted into the lower end of the main pipe 41A. At this time, in the drainage pipe F, as described above, a strong spiral airflow from the special cutting part B to the sewer G is formed. Therefore, the camera head 11 inserted into the drain pipe F is pushed in the direction indicated by the arrow a while dragging the cable 12. As a result, the CCD camera 11a takes a picture of the drain pipe F from the inside from the special cutting section B to the sewer G while moving together with the camera head 11. Image data acquired by photographing is transmitted to the measuring apparatus 20 installed in the special cutting section B through the cable body 121 and displayed on the monitor 22 as an image. Thereby, the worker standing by at the special cutting part B can check the state of the drain pipe F. Further, the image data acquired by photographing is recorded by the digital video 23. Therefore, a person who does not attend the inspection work of the drain pipe F can also check the state of the drain pipe F based on the image data recorded in the digital video 23.

  When the camera head 11 of the inspection camera 10 reaches the sewer G, the supply of air by the compressor 30 is stopped. Then, the worker waiting at the special cutting section B pulls the cable 12 of the inspection camera 10 in the direction indicated by the arrow b, and removes the inspection camera 10 from the drain pipe F. Note that while the inspection camera 10 is removed, the CCD camera 11 a continues to shoot and the state of the drain pipe F is recorded in the digital video 23. Thus, the inspection work for the drain pipe F is completed.

(Operation by this embodiment)
In this embodiment, the camera head 11 of the inspection camera 10 is inserted into the drain pipe F from the special cutting part B, and photographs the drain pipe F from the inside while being propelled by the airflow formed in the drain pipe F. . In addition, the airflow for propelling the camera head 11 is formed by the air blown into the drain pipe F from the connection jig 40A installed in the special cutting part B.

  That is, the inspection of the drain pipe F in the present embodiment is performed by work from one side of the drain pipe F. Therefore, even if it is the drainage pipe F connected to the sewer G which an operator cannot enter, it can be inspected easily.

  In addition, even if groundwater or the like remains in the hanging portion of the drainage pipe F, almost all of the groundwater is removed from the drainage pipe F before photographing the drainage pipe F by the airflow formed in the drainage pipe F. . Therefore, the shooting of the drain pipe F is not disturbed by the groundwater, and as a result, the image displayed on the monitor 22b becomes very clear. This greatly improves the inspection accuracy of the drain pipe F.

  In the present embodiment, the outer sheath 122 of the cable 12 is formed of a steel material (stainless steel or the like) that can be freely bent according to the shape of the bent portion of the drain pipe F. Therefore, when the camera head 11 is propelled in the drain pipe F, the movement of the cable 12 is not suppressed at the bent portion of the drain pipe F. Thereby, even if the drain pipe F has many bent parts, the camera head 11 can smoothly promote the inside of the drain pipe F. In the experiment by the inventor, it has been confirmed that the camera head 11 can be smoothly promoted even with a drain pipe having six bent portions.

  Moreover, since the steel material (stainless steel or the like) that is the material of the exterior 122 has a smaller coefficient of friction with respect to the drain pipe F than the outer skin 121c of the cable 12, the camera head 11 is propelled by friction between the exterior 122 and the drain pipe F. Will not be disturbed.

  In the present embodiment, the connection jig 40A mixes two systems of air supplied from the two sub pipes 42A to form an air flow in the drain pipe F. Therefore, since the airflow formed in the drain pipe F becomes a strong spiral, the camera head 11 inserted into the drain pipe F smoothly promotes.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. Here, the description of the same configurations and operations as those in the first and second embodiments will be omitted.
FIG. 9 is a schematic diagram for explaining the inspection work of the drain pipe F in the third embodiment of the present invention, and FIG. 10 is a schematic diagram for explaining the inspection work of the drain pipe F in the same embodiment.

  As shown in FIGS. 9 to 10, the drainage pipe F in the present embodiment is connected to the drainage basin I as in the first embodiment, but is significantly corroded as compared to the first embodiment. And some are missing. Thus, when the deterioration of the drainage pipe F is progressing remarkably, the air supplied from the compressor 30 flows out from the hole of the drainage pipe F into the ground and propels the camera head 11 of the inspection camera 10. It is difficult to form an airflow sufficient to make it flow. Therefore, when the drain pipe F is remarkably deteriorated as in the present embodiment, the wiring device 50 may be used to move the camera head 11.

  FIG. 11 is a schematic view of the wiring device 50 in the same embodiment. As shown in FIG. 9, the wiring device 50 includes a wire part 51, an injection tool 52, and an operation part 53. The wire portion 51 is a hose having an insertion hole through which water flows, and is formed of a flexible steel material (stainless steel or the like) that can be freely bent. The injection tool 52 has a shape corresponding to an arc of π / 4, and a nozzle 52a is formed at the tip thereof. The nozzle 52a opens from the inner surface of the injection tool 52 toward the center of curvature of the arc. The operation unit 53 is connected to an end portion of the wire unit 51 opposite to the injection tool 52, and the operation of the lever 53a causes the high-pressure water from the water jet generator 55 installed on the ground to the wire unit 51. Supply. The high-pressure water supplied from the water jet generator 55 to the wire unit 51 by the operation of the operation unit 53 is ejected from the nozzle 52 a of the ejection tool 52 through the insertion hole of the wire unit 51. Thereby, the injection tool 52 is propelled in the direction opposite to the injection direction of the water by the reaction of injecting the water.

(Inspection work of drain pipe F)
The inspection work of the drain pipe F will be described with reference to FIGS.
First, an opening (second opening) M having a required size is formed in a portion of the drainage pipe F exposed in the special cutting portion B. Further, as a separate process, the inspection camera 10 is carried into the special cutting section B.

  When the above operations are completed, the grounding worker inserts the injection tool 52 of the line device 50 into the drain pipe F from the opening (second opening) N that opens to the drainage basin I. Then, the high pressure water is supplied to the wire portion 51 by operating the lever 53 a of the operation portion 53. Thereby, a high pressure water is injected from the nozzle 52a formed in the injection tool 52, and the injection tool 52 is propelled in the direction shown by the arrow a while dragging the wire part 51 by the reaction.

  Then, when the injection tool 52 reaches the special cutting part B, the injection tool 52 is pulled out from the opening M formed in the drain pipe F by an operator waiting in the special cutting part B, and the special cutting part B is obtained in advance. It is connected to the connector 123 of the cable 12 of the inspection camera 10 carried in. FIG. 9 shows a state immediately before the injector 52 and the connector 123 are connected.

  And if the connector 123 of the cable 12 is connected to the injection tool 52, the CCD camera 11a will be started and the wire part 51 will be wound up by the operator who waits on the ground. As a result, the connector 123 of the cable 12 is guided to the wire portion 51 and moves in the direction indicated by the arrow b.

  When the connector 123 of the cable 12 connected to the injection tool 52 reaches the drainage basin I, the connector 123 is connected to the connection panel 21 of the measuring device 20 installed on the ground. Then, a portion of the cable 12 protruding from the drainage basin I is pulled by the worker waiting on the ground, and the camera head 11 is drawn through the drainage pipe F in the direction indicated by the arrow b. As a result, the CCD camera 11 a takes a picture of the drainage pipe F from the inside from the special cutting section B to the drainage basin I while moving together with the camera head 11. FIG. 10 shows a state when the cable 12 is pulled.

  By the way, when the camera head 11 of the inspection camera 10 is caught in the bent portion of the drainage pipe F, the worker standing by at the special cutting section B pulls the pullback wire 60 connected to the hook 13 slightly. The camera head 11 is retracted in the direction indicated by the arrow a. Thereby, the catch of the camera head 11 is cancelled | released and smooth movement is restarted. When the camera head 11 reaches the drainage basin I, photographing by the CCD camera 11a is stopped. Thus, the inspection work for the drain pipe F is completed.

(Operation by this embodiment)
In the present embodiment, the camera head 11 of the inspection camera 10 moves from the special cutting section B toward the drainage basin I by pulling the cable 12 protruding from the drainage basin I to the ground. That is, the camera head 11 of the inspection camera 10 moves with the portion to which the cable 12 is connected, that is, the back side portion of the CCD camera 11a as the head. Therefore, even if the drain pipe F has many bent portions, the camera head 11 can be smoothly moved.

  In addition, since the camera head 11 of the inspection camera 10 is at a position lower than the portion of the cable 12 that the operator grips, the speed of the camera head 11 can be freely adjusted by adjusting the operator's force. Therefore, the image of the drain pipe F displayed on the monitor 22 is very easy to see, and the drain pipe F can be inspected accurately.

  In the present embodiment, the outer sheath 122 of the cable 12 is formed of a steel material (stainless steel or the like) that is freely curved according to the shape of the bent portion of the drain pipe F. Therefore, even if the drain pipe F has many bent portions, the propulsion of the camera head 11 is not hindered, so that the inspection work of the drain pipe F is smoothly performed.

  Moreover, since the steel material (stainless steel or the like) that is the material of the exterior 122 has a smaller coefficient of friction with respect to the drain pipe F than the outer skin 121c of the cable 12, the camera head 11 is propelled by friction between the exterior 122 and the drain pipe F. Will not be disturbed.

  In the first to third embodiments, the inspection of the drain pipe F for draining groundwater has been described. However, the present invention is not limited to this, and can be applied to any pipe that has a large number of bent portions. Examples of the pipe having many bent portions include a water pipe, a drain pipe, a gas pipe, and pipes in various manufacturing plants, which are disposed in a building such as an apartment. Even when the present invention is applied to such various pipes, the same effects as those of the first to third embodiments can be obtained.

  Furthermore, in the first to third embodiments, a steel material (stainless steel or the like) is used as a material for the exterior 122. However, the present invention is not limited to this, and any material can be used as long as it is a material that can be freely bent in a bent portion such as the drain pipe F.

In the first and second embodiments, the connection jigs 40 and 40A include two sub pipes 42 and 42A, respectively. However, the present invention is not limited thereto, as long as sufficient air flow to propel the camera head 11 can be formed, even for example one or three or more have good.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

Schematic for demonstrating the inspection operation | work of the drain pipe in the 1st Embodiment of this invention. Schematic of the inspection camera in the same embodiment. The schematic diagram of the cable in the embodiment. The schematic diagram of the measuring device in the embodiment. Schematic of the compressor in the same embodiment. The schematic diagram of the connection jig in the embodiment. Schematic for demonstrating the inspection operation | work of the drain pipe in the 2nd Embodiment of this invention. The schematic diagram of the connection jig in the embodiment. Schematic for demonstrating the inspection operation | work of the drain pipe in the 3rd Embodiment of this invention. Schematic for demonstrating the inspection work of the drain pipe in the embodiment. FIG. 2 is a schematic diagram of a wiring device in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Camera head, 30 ... Compressor (compression means), 40 ... Connection jig (synthesis | combination means), 40A ... Connection jig (synthesis | combination means), 51 ... Wire part (wire), 60 ... Pull-back wire, 121 ... Cable main body (Cable), 121b ... outer skin, 122 ... exterior, F ... drainage pipe (pipe), N ... opening (first opening), M ... opening (second opening).

Claims (6)

A camera head that is formed in a spherical shape with an outer diameter smaller than the inner diameter of the pipe to be inserted, and photographs the pipe from the inside;
A cable connected to the opposite side to the shooting side of the camera head;
An outer sheath that covers the cable and curves freely according to the shape of the pipe ;
An airflow forming means connected to the pipe on the side from which the cable is pulled out, forming a spiral airflow in the pipe into which the camera head is inserted, and propelling the camera head along the pipe;
A piping inspection device characterized by comprising: The pipe inspection apparatus according to claim 1, wherein the outer material has a lower coefficient of friction with respect to the pipe than the outer material of the cable. The piping inspection device according to claim 1, wherein a material of the exterior is a steel material. The airflow forming means includes
Compression means for compressing air to form a plurality of airflows;
The pipe inspection apparatus according to claim 1 , further comprising: a combining unit configured to combine a plurality of airflows formed by the compression unit and supply the airflow into the pipe. A camera head which is formed in a spherical shape having an outer diameter smaller than the inner diameter of the pipe to be inserted, and photographs the pipe from the inside; a cable which is connected to the opposite side to the photographing side of the camera head; and covers the cable An exterior that freely curves according to the shape of the pipe; and is connected to the pipe on the side from which the cable is drawn, and forms a spiral airflow in the pipe into which the camera head is inserted. An airflow forming means for propelling the camera head along the pipe; and a pipe inspection device comprising:
A step of inserting the camera head in the pipe having a plurality of bends,
Forming a spiral airflow in the pipe and photographing the pipe from the inside while propelling the camera head in the pipe ;
A piping inspection method characterized by comprising: A camera head which is formed in a spherical shape having an outer diameter smaller than the inner diameter of the pipe to be inserted, and photographs the pipe from the inside; a cable which is connected to the opposite side to the photographing side of the camera head; and covers the cable An exterior that freely curves according to the shape of the pipe; and is connected to the pipe on the side from which the cable is drawn, and forms a spiral airflow in the pipe into which the camera head is inserted. An airflow forming means for propelling the camera head along the pipe; and a pipe inspection device comprising:
By inserting the wire from the first opening of the pipe, a step of projecting the wire from the opposite side of the second opening of the first opening,
The end of the wire protruding from the second opening of the pre-Symbol pipe, a step of connecting said cable with the pipe outer,
Pull the wire protruding from the front Symbol first opening, a step with inserting the cable into the pipe from the second opening to protrude the cable from the first opening of the pipe,
Pull the cable protruding from the first opening, while moving the mosquitoes Meraheddo, a step of capturing the pipe from the inside
A piping inspection method characterized by comprising:

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