JP2014217097A - In-pipe investigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-pipe investigation device capable of reducing worker's workload needed for investigation.SOLUTION: An in-pipe investigation device comprises: a fiberscope having an imaging section on a leading end thereof; a fixing member which is in an annular shape, and mounted on an outer periphery of the fiberscope; a movable member which is arranged on the outer periphery of the fiberscope, and capable of contacting with and separating from the fixing member along a longitudinal direction of the fiberscope; elastic members which are arranged between the fixing member and the movable member, and deformed so as to project in a direction separating from an outer peripheral surface of the fiberscope when the movable member moves closer to the fixing member; and wire-passing wires each of which has a leading end set on the movable member, and extends along the longitudinal direction of the fiberscope.

Description

  The present invention relates to an in-pipe investigation apparatus used for investigation of an internal state of a tubular member.

  Some steel towers that support power transmission lines that form overhead power transmission lines are configured using steel pipes. The steel tower using such a steel pipe is mainly used to support a power transmission line constituting the main trunk line, and is designed to have a height of about 60 m to 100 m. The steel tower using a steel pipe is comprised by members, such as four main pillar materials, an abdominal material, and a brace. For example, in a steel tower having a height of about 60 m to 100 m, a main pillar material having a diameter of about 100 mm to 400 mm and made of galvanized iron is used.

  Since the material constituting the steel tower (hereinafter referred to as “steel steel pipe”) is made of iron, corrosion proceeds when galvanization disappears over time. When steel tower steel pipes are corroded, the strength of the steel tower decreases. For this reason, conventionally, before the zinc plating disappears, measures are taken to prevent the strength of the steel tower from decreasing by coating the outside of the steel tower steel pipe.

  The steel tower steel pipe constituting the steel tower is almost sealed inside, and it is difficult to grasp the internal state of the steel tower steel pipe as the main pillar material, for example, the state of corrosion. For this reason, when the water drainage hole provided in the flange part of the steel tower steel tube is visually observed and rust juice is generated from the water drainage hole, using a fiberscope, for example, the state of corrosion, We are investigating the state of the steel tower pipe that is the main pillar material.

  Conventionally, for example, by opening the end lid of the main pillar material at the top of the steel pipe tower, inserting the fiberscope from the part where the end lid is opened, and taking and confirming the image obtained through the fiberscope using a camera , I was investigating the internal state of the steel tower steel pipe that will be the main pillar material. Conventionally, for example, a fiberscope is inserted from a drain hole provided in a flange portion located in the vicinity of 1 m above the ground in the main pillar material, and an image obtained through the fiberscope is photographed and confirmed using a camera. Thus, the state inside the steel tower steel pipe as the main pillar material was investigated.

  Conventionally, as a related technique, for example, a fiberscope having a CCD camera at its tip can be inserted / removed inside and around a tube inner surface holding device body having a flexible hollow tube, with the fiberscope as a center. There has been a technique related to a tube inner surface observation device provided with a spring band that curves and protrudes toward the outer peripheral side (see, for example, Patent Document 1 below).

  In addition, as related technology, for example, in-pipe inspection in which a traveling vehicle connected to an inspection device and an inspection vehicle that supports the inspection device in a swingable and rotatable manner is allowed to travel inside the pipe to be inspected. There was a technique related to a traveling vehicle (see, for example, Patent Document 2 below).

JP 2010-145183 A JP-A-6-123402

  However, as described above, the conventional technology for investigating the internal state of a steel tower pipe by inserting a fiberscope from the top of the steel pipe tower carries steel pipes necessary for investigation (survey equipment) such as a fiberscope. Ascend to the steel tower and prepare the survey equipment at high altitude. For this reason, the conventional technology for investigating the state of the steel tower pipe by inserting a fiberscope from the top of the steel pipe tower has a problem that the burden on the worker for the investigation is large and the safety is inferior. . Moreover, since the conventional technique which investigates the state inside a steel tower steel pipe by inserting a fiberscope from the top part of a steel pipe steel tower has a heavy burden on the worker who investigates, the steel pipe steel tower which can be investigated is 1 to 1 per day. There were about two units, and there was a problem that work efficiency was low.

  In addition, as described above, the conventional technique for investigating the state of the steel tower pipe by inserting a fiberscope from the drain hole has an investigation range of about 5 to 6 m from the drain hole. Limited to range. For this reason, the conventional technique of investigating the state of the steel tower steel pipe by inserting the fiberscope from the drain hole is the conventional technique of investigating the internal condition of the steel tower steel pipe by inserting the fiberscope from the top of the steel pipe steel tower. In addition to the problems that the burden on the workers involved in the survey is heavy, the safety is inferior, and the work efficiency is low, it is necessary to conduct surveys in multiple ways. There was a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an in-pipe investigation apparatus that can reduce the burden on a worker involved in an investigation in order to eliminate the above-described problems caused by the prior art.

  In order to solve the above-described problems and achieve the object, an in-pipe investigation apparatus according to the present invention includes a fiberscope having an imaging unit at a tip, and a ring-shaped fixing member attached to the outer periphery of the fiberscope, A movable member provided on an outer periphery of the fiberscope and capable of contacting and separating from the fixed member along a length direction of the fiberscope; and provided between the fixed member and the movable member. An elastic member that deforms so as to protrude in a direction away from the outer peripheral surface of the fiberscope when the movable member approaches, and one end of the elastic member attached to the movable member, and the fiberscope along the fiberscope And a wire wire extending in the length direction.

  In the in-pipe inspection apparatus according to the present invention as set forth in the invention described above, a plurality of the elastic members are provided at equal intervals on a concentric circle centered on the fiberscope.

  In the in-pipe investigation apparatus according to the present invention, in the above invention, a plurality of the wire wires are provided at equal intervals on a concentric circle centered on the fiberscope.

  In the in-pipe investigation device according to the present invention, in the above invention, the movable member is locked in a state where the movable member is close to the fixed member, and the movable member is fixed to the fixed member. And a locking member for releasing the locking of the movable member when a biasing force having a magnitude greater than a predetermined level is applied to bias the moving member in the direction of separating the movable member.

  Further, the in-pipe investigation device according to the present invention is the above-described invention, wherein the in-pipe investigation apparatus can be inserted into a hole provided in the investigation target member having a tube shape and penetrating the tube wall of the investigation target member, and the tip portion is the hole A guide member that guides the positions of the fiberscope and the wire to be introduced into the investigation target member, and a bending means that bends the tip portion of the guide member in a predetermined direction. It is provided with.

  In the in-pipe inspection apparatus according to the present invention as set forth in the invention described above, the fiberscope is provided with a scale indicating the distance from the tip of the fiberscope.

  According to the in-pipe investigation device according to the present invention, there is an effect that it is possible to reduce the burden on the worker for the investigation.

It is explanatory drawing (the 1) which shows the structure of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 2) which shows the structure of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing which shows a guide member. It is explanatory drawing (the 1) which shows the structure of a locking member. It is explanatory drawing (the 2) which shows the structure of a locking member. It is explanatory drawing (the 3) which shows the structure of a locking member. It is explanatory drawing (the 1) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 2) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 3) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 4) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 5) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 6) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 7) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing (the 8) which shows the usage method of the in-pipe investigation apparatus of embodiment concerning this invention. It is explanatory drawing which shows another embodiment of the in-pipe investigation apparatus concerning this invention.

  Exemplary embodiments of an in-pipe inspection apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

(Configuration of in-pipe inspection device)
First, the configuration of the in-pipe inspection apparatus according to the embodiment of the present invention will be described. 1 and 2 are explanatory views showing the configuration of the in-pipe inspection apparatus according to the embodiment of the present invention. 1 and 2, an in-pipe inspection apparatus 100 according to an embodiment of the present invention includes a fiberscope 101 that includes an imaging unit (imaging lens) (not shown) at the tip.

  The fiberscope 101 is configured by bundling a plurality of flexible optical fibers. In the fiberscope 101, an imaging lens is attached to one end of the bundled optical fibers. In the fiberscope 101, an eyepiece (eyepiece) is attached to the other end of the bundled optical fibers.

  The fiberscope 101 is provided with a scale 102 indicating the distance from the tip of the fiberscope 101. The scale 102 can be realized by, for example, a scale line provided at predetermined intervals such as every 1 cm, every 10 cm, or every 1 m, or a number indicating the distance from the tip of the fiberscope 101 of each scale line. By providing the scale 102 on the fiberscope 101, the fiberscope 101 itself can be used as a measuring instrument such as a measure or a scale.

  A fixing member 103 is attached to the outer periphery of the fiberscope 101. The fixing member 103 has an annular shape. A movable member 104 is provided on the outer periphery of the fiberscope 101. The movable member 104 has a ring shape, and is provided in a state where the fiber scope 101 is positioned on the inner peripheral side of the ring. The movable member 104 is not fixed to the fiberscope 101 and can be displaced with respect to the fiberscope 101. Thereby, the movable member 104 is provided so as to be able to contact and separate from the fixed member 103 along the length direction of the fiber scope 101.

  An elastic member 105 is provided between the fixed member 103 and the movable member 104. The fixed member 103 and the movable member 104 are connected via an elastic member 105. The elastic member 105 is formed using a material having elasticity that can be deformed so as to protrude in a direction away from the outer peripheral surface of the fiber scope 101 when the movable member 104 approaches the fixed member 103.

  A plurality of elastic members 105 are provided at equal intervals on a concentric circle with the fiberscope 101 as the center. The elastic member 105 can be formed using, for example, a flexible and elastic material such as a stainless steel wire. Alternatively, the elastic member 105 is formed by, for example, coating the surface of a stainless steel wire with a material having a large frictional force on the surface of rubber or the like and deforming according to the distance between the fixed member 103 and the movable member 104. Also good.

  A wiring wire 106 is attached to the movable member 104. One end of the wire 106 is attached to the movable member 104, and extends along the fiberscope 101 in the length direction of the fiberscope 101. A plurality of through wires 106 are provided at equal intervals on a concentric circle centered on the fiberscope 101.

  The in-pipe inspection apparatus 100 includes a locking member 107 that locks the movable member 104 in a state where the movable member 104 approaches the fixed member 103. The locking member 107 can be realized by, for example, a claw-like member provided on the fixing member 103 and elastically deformed when an external force is applied (see FIGS. 4 to 6).

  The in-pipe inspection apparatus 100 includes a guide member (see FIG. 3) that guides the positions of the fiberscope 101 and the wire 106 that are introduced into the investigation target member. In-pipe inspection apparatus 100 uses, for example, a member having a pipe shape as an investigation target member such as a steel pipe constituting a steel pipe tower. The investigation target member includes a hole penetrating the tube wall of the investigation target member, for example, a drain hole (see FIG. 7 and the like). The guide member has a shape and a size that can be inserted into a hole provided in the investigation target member.

  FIG. 3 is an explanatory view showing a guide member. In FIG. 3, the guide member 300 is separate from the main body of the in-pipe inspection apparatus 100 configured by the fiberscope 101 and each member connected to the fiberscope 101. The size of the guide member 300 can be appropriately selected according to the hole provided in the investigation target member. The guide member 300 guides the positions of the fiber scope 101 and the wire 106 in a state where the distal end portion of the guide member 300 is inserted into the hole of the investigation target member.

  The distal end portion of the guide member 300 can be bent in a predetermined direction. Specifically, the guide member 300 can be made of, for example, bimetal. The bimetal is configured by superimposing two types of substantially plate-like metals 301 and 302 having different thermal expansion coefficients along the thickness direction, and pasting them together in a superposed state.

  The bimetal expands when the bimetal itself is heated to a predetermined temperature or higher by being heated. At this time, due to the difference in coefficient of thermal expansion between the two types of metals, a metal having a large coefficient of thermal expansion expands more than a metal having a small coefficient of thermal expansion. In the bimetal, two kinds of metals are bonded to each other. Therefore, when the bimetal itself is heated to a predetermined temperature or higher, the metal 301 having a high coefficient of thermal expansion is directed to the metal 302 having a small coefficient of thermal expansion, that is, the coefficient of thermal expansion is large. The metal 301 is deformed so as to involve the metal 302 having a small coefficient of thermal expansion.

  The guide member 300 made of bimetal has a substantially plate shape with a predetermined length, and is curved in a substantially arc shape along the width direction (direction intersecting the length direction). Of the two types of metals constituting the bimetal, the metal 301 having a large coefficient of thermal expansion is provided on the outer peripheral side of the metal 302 having a small coefficient of thermal expansion.

(Configuration of locking member 107)
Next, the configuration of the locking member 107 will be described. 4, 5, and 6 are explanatory views showing the configuration of the locking member 107. 4, 5, and 6, one end of the locking member 107 is attached to the fixing member 103 along the outer peripheral surface of the fiberscope 101. The other end of the locking member 107 is bent in a bowl shape toward the outer peripheral surface side of the fiber scope 101. The locking member 107 is elastically deformed when an external force is applied (see FIG. 5), and returns to its original shape when released from the applied external force (see FIGS. 4 and 6). It can be formed using the material which has.

  The locking member 107 is urged by the movable member 104 when the movable member 104 moves away from the fixed member 103 (see FIG. 4) and approaches the fixed member 103. The claw portion is deformed in a direction away from the outer peripheral surface of the fiberscope 101 so as to avoid the fixing member 103 (see FIG. 5). When the movable member 104 further approaches the fixed member 103 and the movable member 104 is positioned closer to the fixed member 103 than the hook-shaped tab portion, the locking member 107 returns to its original shape due to its own elasticity. The hook portion is caught on the fixing member 103 (see FIG. 6). As a result, the movable member 104 can be locked to the fixed member 103.

  The locking by the locking member 107 can be released when an urging force having a magnitude larger than a predetermined value that urges the movable member 104 in a direction to separate the movable member 104 from the fixed member 103 is applied. When the movable member 104 moves away from the fixed member 103, the hook-shaped claw portion is deformed in a direction away from the outer peripheral surface of the fiber scope 101 so as to avoid locking with the fixed member 103. In this state, when the movable member 104 is further moved away from the fixed member 103, the locking by the locking member 107 can be released.

  Next, a method of using the in-pipe inspection apparatus 100 according to the embodiment of the present invention will be described. FIGS. 7, 8, 9, 10, 11, 12, 13, and 14 are explanatory diagrams showing how to use the in-pipe inspection apparatus 100 according to the embodiment of the present invention.

  The in-pipe inspection apparatus 100 according to the embodiment of the present invention can be used, for example, in an operation of investigating the state inside a tubular member such as a steel pipe constituting a steel pipe tower. In such an operation, first, the guide member 300 is inserted into the water drain hole 702 in the main column member (steel pipe) 701 of the steel pipe tower supported by the foundation 700. At this time, the guide member 300 is inserted into the water draining hole 702 with the metal 302 having a small coefficient of thermal expansion facing upward along the vertical direction of the guide member 300 having a substantially arc shape. (See FIG. 7).

  The drain hole 702 is provided in the flange portion 703 located in the vicinity of 1 m above the ground, and penetrates the steel pipe tower along the thickness direction of the steel pipe tower. The water draining hole 702 is opened with a size of about 20 mm wide × about 10 mm long.

  Next, an electric heater (heater) (not shown) is brought into contact with the guide member 300 inserted into the water draining hole 702. The electric heater is a heater that uses heat generated by passing a current through a metal having high electrical resistance such as a nichrome wire, and various known electric heaters can be used. The nichrome wire in the electric heater may have a shape that matches the shape of the guide member 300 so that the contact area with the guide member 300 increases. Or you may make it ensure the contact area of the nichrome wire in an electric heater, and the guide member 300 by making some guide members 300 into the shape match | combined with the shape of the nichrome wire in an electric heater.

  The guide member 300 can be heated by turning on the electric heater while the nichrome wire in the electric heater is in contact with the guide member 300. Then, by raising the temperature of the guide member 300, the guide member 300 can be deformed such that the metal 301 having a high thermal expansion coefficient entrains the metal 302 having a low thermal expansion coefficient. The guide member 300 is deformed so as to bend upward along the vertical direction when the metal 302 having a small coefficient of thermal expansion is inserted into the drain hole 702 with the metal 302 facing upward along the vertical direction. (See FIG. 8).

  Next, in a state where the monitor 900 is connected to the other end (eyepiece side) of the fiberscope 101, the fiberscope 101 is placed along the guide member 300 inserted into the drainage hole 702, and the in-pipe inspection apparatus 100 is connected. Is inserted into the steel pipe from the tip side (lens side) (see FIG. 9). Various known monitors 900 that can be connected to the fiberscope 101 can be used as the monitor 900.

  Since the bimetal is bent upward along the vertical direction, the fiberscope 101 inserted into the steel pipe is guided upward along the vertical direction by the bimetal (see FIG. 10). Then, with the fixed member 103 and the movable member 104 inserted into the main column member (steel pipe) 701, the movable member 104 is biased toward the fixed member 103 via the wire 106. With the fiberscope 101 fixed (see FIG. 11), the movable member 104 pushes only the wire wire 106 into the main column member (steel pipe) 701, thereby moving the movable member 104 via the wire wire 106. The fixing member 103 can be biased.

  When the movable member 104 approaches the fixed member 103 by urging the movable member 104 toward the fixed member 103, the elastic member 105 is deformed so as to protrude in a direction away from the outer peripheral surface of the fiberscope 101 (FIG. 12). By deforming, the elastic member 105 is stretched between the fiberscope 101 and the inner surface of the steel pipe (see FIG. 13). In a state where the elastic member 105 is stretched, the fiberscope 101 inserted from the drain hole 702 is operated using friction between the elastic member 105 pressed against the inner surface of the main column member (steel pipe) 701 and the inner surface of the steel pipe. Even if a member is not supporting, the tip position of the fiberscope 101 can be stopped in the main pillar material (steel pipe) 701 of the steel tower.

  By forming the elastic member 105 using an elastic material such as a stainless steel wire, the elastic member 105 is surely pressed against the inner surface of the main column member (steel pipe) 701, and the distal end position of the fiber scope 101. Can be reliably stopped in the main pillar material (steel pipe) 701 of the steel tower. Furthermore, the surface of the stainless steel wire is coated with a material having a high frictional force, such as rubber, thereby increasing the frictional resistance between the inner surface of the main column member (steel pipe) 701 and the elastic member 105, and the main column member of the steel tower ( The position of the fiberscope 101 in the (steel pipe) 701 can be reliably stopped.

  Then, in a state where the elastic member 105 is stretched, the through wire 106 is further pushed into the main pillar material (steel pipe) 701 (see FIG. 14). As a result, the fiberscope 101 is urged through the wire 106, and the tip position of the fiberscope 101 can be pushed up in the main column member (steel pipe) 701 in a direction away from the ground. The tip position of the fiberscope 101 in the main pillar material (steel pipe) 701 can be determined by the scale 102 provided on the fiberscope 101. Thereby, the worker who investigates the state inside the main column member (steel pipe) 701 can easily and reliably grasp the height of the tip position of the fiberscope 101 from the ground.

  Since the height of the tip position of the fiberscope 101 from the ground can be grasped, if an abnormality such as corrosion in the main column member (steel pipe) 701 is confirmed via the monitor 900, the abnormality occurs. Can be identified (or estimated) without cutting the main pillar material (steel pipe) 701 and confirming it.

  The operator confirms the height of the tip position of the fiberscope 101 from the ground with the scale 102 provided on the fiberscope 101, and sets the tip position (lens) of the fiberscope 101 in the main column member (steel pipe) 701. While pushing up to the top, the inside of the main pillar (steel pipe) 701 is photographed through the lens by the fiberscope 101.

  Then, after the photographing up to the top of the main pillar material (steel pipe) 701 is completed, the fiberscope 101 inserted into the main pillar material (steel pipe) 701 is collected. The fiberscope 101 can be collected by pulling the fiberscope 101 and the wire 106 out of the main pillar material (steel pipe) 701. With the fiberscope 101 fixed (see FIG. 11), the fiberscope 101 is pulled out of the main column member (steel pipe) 701, and the distal end position of the fiberscope 101 is fixed by the elastic member 105. May be pulled out of the main column member (steel pipe) 701 after releasing the.

  In a state where the fiberscope 101 is fixed (see FIG. 11), when only the wiring wire 106 is pulled out of the main column member (steel pipe) 701, the movable member 104 is pulled to the fixed member 103 side by the wiring wire 106. Thus, the movable member 104 moves in a direction away from the fixed member 103. When the movable member 104 moves in the direction away from the fixed member 103, the elastic member 105 protruding in the direction away from the outer peripheral surface of the fiberscope 101 is separated from the inner surface of the steel pipe. Thereby, fixation of the front-end | tip position of the fiberscope 101 by the elastic member 105 can be cancelled | released. The fiberscope 101 can be easily pulled out by collecting the fiberscope 101 after releasing the fixation of the distal end position of the fiberscope 101 by the elastic member 105.

(Another embodiment)
FIG. 15 is an explanatory diagram showing another embodiment of the in-pipe inspection apparatus 100 according to the present invention. As shown in FIG. 15, the in-pipe inspection apparatus 100 according to the present invention may include a hose 1500 with a nozzle 1500a for painting. In this case, the hose 1500 is fixed to the wiring wire 106.

  When an abnormality such as corrosion in the main pillar material (steel pipe) 701 is confirmed through the monitor 900 by attaching the hose 1500 with the nozzle 1500a for painting to the wire 106, the location where the abnormality has occurred In addition, the paint can be sprayed from the nozzle 1500a of the hose 1500 to repair the abnormality occurrence portion. By spraying the paint on the location where the abnormality has occurred, it is possible to suppress the progress of abnormality such as corrosion.

  Thus, according to the in-pipe inspection apparatus 100 of another embodiment, the presence or absence of an abnormality in the main column member (steel pipe) 701 is confirmed without cutting the main column member (steel pipe) 701 tube, In addition to identifying the location where an abnormality has occurred, if it is confirmed that an abnormality has occurred, the abnormal location can be repaired immediately. Thereby, the location where abnormality, such as corrosion, has occurred can be repaired quickly and accurately, and deterioration of the steel tower can be suppressed.

  By using the in-pipe investigation apparatus 100 described above, preparation of investigation equipment at the tower and the top of the tower becomes unnecessary. Thereby, since the fall and electric shock disaster by the tower to a steel tower can be prevented, the improvement of safety can be aimed at.

  Further, by using the in-pipe inspection apparatus 100 described above, it is possible to shorten the investigation time per one steel tower as compared with the case where the investigation is performed by the conventional method. Thereby, compared with the case where the internal investigation of the steel pipe main material is performed from the ground by the conventional method, the number of steel towers which can be investigated per day can be increased. And thereby, shortening of the investigation period concerning all the steel towers to be managed can be achieved.

Specifically, for example, in the case of a conventional method for conducting an internal investigation of the main columnar material (steel pipe) 701 from the end lid of the main columnar material (steel pipe) 701 at the top of the steel tower, the required time for the investigation per day (reference) Needed.
"Time to move to the first tower: 60 minutes"
+ "Preparation and investigation of equipment for the first tower survey: 120 minutes"
+ "Movement time to the second tower: 60 minutes"
+ "Preparation and investigation of equipment for the second tower survey: 120 minutes"
+ “Movement after work: 60 minutes”
= 420 minutes (7 hours)

On the other hand, when the improved method using the in-pipe investigation apparatus 100 according to the embodiment of the present invention is used, the following investigation required time (standard) per day can be calculated as follows.
"Time to move to the first tower: 60 minutes"
+ “Preparation and investigation of equipment for the first tower survey: 60 minutes”
+ "Movement time to the second tower: 60 minutes"
+ "Preparation and investigation of equipment for the second tower survey: 60 minutes"
+ "Movement time to the third tower: 60 minutes"
+ "Preparation and investigation of equipment for the third tower survey: 60 minutes"
+ “Movement after work: 60 minutes”
= 420 minutes (7 hours)

  As described above, in the survey using the conventional method, the survey of the two steel towers per day is performed. By conducting the survey using the in-pipe survey apparatus 100 according to the embodiment of the present invention, the survey is performed per day. Increase to 3 units. Thereby, the investigation period concerning all the steel towers to be managed can be shortened to 2/3.

  As described above, the in-pipe inspection device 100 according to the embodiment of the present invention includes the fiberscope 101 having the imaging unit at the tip, the ring-shaped fixing member 103 attached to the outer periphery of the fiberscope 101, A movable member 104 provided on the outer periphery of the fiberscope 101 and capable of coming into contact with and separating from the fixed member 103 along the length direction of the fiberscope 101, and provided between the fixed member 103 and the movable member 104 and fixed. When the movable member 104 approaches the member 103, an elastic member 105 that deforms so as to protrude in a direction away from the outer peripheral surface of the fiberscope 101, and one end is attached to the movable member 104, along the fiberscope 101. A wire 106 extending in the length direction of the fiberscope 101 It is characterized in that.

  When investigating the internal state of a steel pipe using the in-pipe investigation apparatus 100 according to the embodiment of the present invention, an operator is first connected on the ground via the movable member 104, the elastic member 105, and the fixed member 103. The fiberscope 101 and the connecting wire 106 are inserted into the steel pipe through the drain hole 702. Then, the wire wire 106 is further inserted into the steel pipe with the position of the fiberscope 101 fixed, thereby urging the movable member 104 in a direction in which the movable member 104 approaches the fixed member 103.

  When the movable member 104 approaches the fixed member 103 by this urging force, the elastic member 105 is deformed so as to protrude in a direction away from the outer peripheral surface of the fiberscope 101. As a result, the elastic member 105 is stretched between the fiberscope 101 and the inner surface of the steel pipe. As a result, according to the in-pipe inspection apparatus 100 of the embodiment of the present invention, water is removed by utilizing friction between the elastic member 105 pressed against the inner surface of the steel pipe and the inner surface of the steel pipe by the elastic member 105 being stretched. Even if the operator does not support the fiberscope 101 inserted from the hole 702, the tip position of the fiberscope 101 can be stopped in the steel tower pipe.

  In this state, if the fiberscope 101 and the wire 106 are energized so as to be pushed further into the steel pipe, the water can be drained without dropping the fiberscope 101 even if an operator releases the hand on the way. The fiberscope 101 inserted through the hole 702 can be pushed up from the ground side toward the tower top side.

  Thus, according to the in-pipe inspection apparatus 100 of the embodiment according to the present invention, the fiberscope 101 is inserted into the drainage hole 702 for the worker who investigates the internal state of the steel pipe, and the ground side It is possible to investigate the internal state of the steel pipe by simply pushing it up toward the top of the tower. As a result, according to the in-pipe investigation apparatus 100 of the embodiment according to the present invention, it is possible to reduce the burden on the worker involved in the investigation.

  Further, according to the in-pipe inspection apparatus 100 according to the embodiment of the present invention, when pushing up the fiberscope 101 inserted from the water draining hole 702 from the ground side toward the steel tower top side, the worker is in the middle. Since it is possible to prevent the fiberscope 101 from falling even if the hand is released from the scope 101, it is possible to concentrate on the work of pushing up the fiberscope 101 to the worker. As a result, according to the in-pipe investigation apparatus 100 of the embodiment according to the present invention, it is possible to reduce the burden on the worker involved in the investigation.

  In the investigation of the internal state of the steel pipe using the in-pipe investigation apparatus 100 according to the embodiment of the present invention, after the investigation is completed, the wire wire 106 is pulled while the position of the fiberscope 101 is fixed. The movable member 104 is biased with respect to the movable member 104 in a direction away from the fixed member 103.

  When the movable member 104 is separated from the fixed member 103 by this urging force, the elastic member 105 that has been deformed so as to protrude in the direction away from the outer peripheral surface of the fiberscope 101 is extended, and the elastic member 105 is made to be a steel pipe. It can be separated from the inner surface. Thereby, the fiberscope 101 and the through wire 106 can be easily pulled out from the steel pipe.

  As described above, according to the in-pipe inspection apparatus 100 according to the embodiment of the present invention, the fiberscope 101 is inserted into the steel pipe and the fiberscope 101 is inserted into the steel pipe simply by operating the wire 106 on the ground. Can be stopped at an arbitrary position in the steel pipe, and the fiberscope 101 inserted into the steel pipe can be easily pulled out. As a result, according to the in-pipe investigation apparatus 100 of the embodiment according to the present invention, it is possible to reduce the burden on the worker involved in the investigation.

  According to the in-pipe inspection apparatus 100 according to the embodiment of the present invention, when investigating the internal state of a steel pipe, it is not necessary to carry the investigation equipment and ascend to the steel tower, and the work to investigate the inside of the steel pipe on the ground is performed. Therefore, it is possible to improve the safety of workers involved in the investigation. Further, according to the in-pipe inspection apparatus 100 of the embodiment according to the present invention, it is possible to eliminate the preparation of the inspection equipment at a high place, so that it is possible to reduce the burden on the worker for the investigation.

  In addition, according to the in-pipe inspection apparatus 100 of the embodiment of the present invention, it is possible to ascend to a steel tower or to make preparation and removal work of investigation equipment unnecessary. The working time per unit can be shortened, and the working efficiency can be improved. Thereby, the number of steel towers that can be surveyed in a unit period such as one day can be increased, and the work efficiency can be improved.

  Further, the in-pipe inspection apparatus 100 according to the embodiment of the present invention is characterized in that a plurality of elastic members 105 are provided at equal intervals on a concentric circle with the fiberscope 101 as the center.

  According to the in-pipe inspection device 100 according to the embodiment of the present invention, the position where the elastic member 105 abuts the inner surface of the steel pipe by the elastic member 105 being stretched can be positioned on a concentric circle centering on the fiberscope 101. it can. Thereby, according to the in-pipe inspection apparatus 100 of this embodiment concerning this invention, since the inner surface of a steel pipe can be imaged from the center of a steel pipe, the precision of the imaged image is the fiberscope 101 and the inner surface of a steel pipe. It is possible to suppress the variation due to the difference in the distance and to reliably investigate the inner surface of the steel pipe.

  In addition, the in-pipe inspection apparatus 100 according to the embodiment of the present invention is characterized in that a plurality of wire wires 106 are provided at equal intervals on a concentric circle centered on the fiberscope 101.

  According to the in-pipe inspection apparatus 100 of the embodiment according to the present invention, the urging force transmitted to the fiberscope 101 via the through-wire 106 is obtained by energizing the through-wire 106 so as to be pushed into the steel pipe. The fiberscope 101 can be generated evenly on the outer periphery of the fiberscope 101, and the fiberscope 101 can be moved along the axial direction of the steel pipe in the steel pipe. Thereby, according to the in-pipe inspection apparatus 100 of this embodiment concerning this invention, when pushing in the fiberscope 101 in a steel pipe, it can prevent that the said fiberscope 101 contacts and damages the inner surface of a steel pipe.

  In addition, the in-pipe inspection apparatus 100 according to the embodiment of the present invention locks the movable member 104 with the movable member 104 approaching the fixed member 103 and fixes the movable member 104 to the movable member 104. A locking member 107 is provided that releases the locking of the movable member 104 when a biasing force having a magnitude greater than a predetermined level that biases the member 103 away from the member 103 is applied.

  According to the in-pipe inspection apparatus 100 according to the embodiment of the present invention, the fiberscope 101 inserted into the steel pipe can be reliably stopped at an arbitrary position in the steel pipe simply by operating the wire 106, and the steel pipe can be stopped. The inserted fiberscope 101 can be easily pulled out. As a result, according to the in-pipe investigation apparatus 100 of the embodiment according to the present invention, it is possible to reduce the burden on the worker involved in the investigation.

  Further, the in-pipe inspection apparatus 100 according to the embodiment of the present invention can be inserted into a hole that is provided in a tube-shaped investigation target member and penetrates the tube wall of the investigation target member, and the tip portion is the hole. The guide member 300 that guides the positions of the fiberscope 101 and the wire 106 that are introduced into the investigation target member and a bending means (electric heat) that bends the tip of the guide member 300 in a predetermined direction. ).

  According to the in-pipe inspection apparatus 100 of the embodiment of the present invention, the distal end portion of the guide member 300 is bent in a predetermined direction (for example, upward) with the guide member 300 inserted into the drain hole. Accordingly, the fiberscope 101 and the wire 106 can be inserted in any direction in the steel pipe. Thereby, the desired position in a steel pipe can be investigated easily and reliably.

  The in-pipe investigation apparatus 100 according to the embodiment of the present invention is not limited to a steel tower steel pipe, and can be used for investigation of the state inside the tubular member. Then, by using the in-pipe inspection apparatus 100 according to the embodiment of the present invention, it is possible to reduce the burden on the worker involved in the internal investigation of the tubular member, improve safety, and improve work efficiency. .

  The in-pipe inspection apparatus 100 according to the embodiment of the present invention is characterized in that the fiberscope 101 includes a scale 102 indicating the distance from the tip of the fiberscope 101.

  According to the in-pipe inspection apparatus 100 of the embodiment according to the present invention, the tip position of the fiberscope 101 in the steel pipe can be easily grasped. Thereby, the operator can specify the tip position of the fiberscope 101 when necessary without being aware of the length of the fiberscope 101 pushed into the steel pipe.

  As described above, the in-pipe investigation device according to the present invention is useful for the in-pipe investigation device used for investigation of the internal state of the tubular member, and in particular, such as ascending to a high place such as a steel pipe tower. Is suitable for an in-pipe inspection apparatus used for checking the internal state of a tubular member involved in work that has been dangerous for the in-pipe investigation.

DESCRIPTION OF SYMBOLS 100 In-pipe investigation apparatus 101 Fiberscope 103 Fixed member 104 Movable member 105 Elastic member 106 Wire wire 107 Locking member

Claims (6)

A fiberscope with an imaging unit at the tip;
A fixing member having a ring shape attached to the outer periphery of the fiberscope;
A movable member that is provided on an outer periphery of the fiberscope, and is movable toward and away from the fixed member along a length direction of the fiberscope;
An elastic member provided between the fixed member and the movable member, and deformed so as to protrude in a direction away from the outer peripheral surface of the fiberscope when the movable member approaches the fixed member;
One end is attached to the movable member, and a wire that extends in the length direction of the fiberscope along the fiberscope;
An in-pipe investigation device characterized by comprising:   The in-pipe investigation apparatus according to claim 1, wherein a plurality of the elastic members are provided at equal intervals on a concentric circle centered on the fiberscope.   The in-pipe investigation apparatus according to claim 1 or 2, wherein a plurality of the wire wires are provided at equal intervals on a concentric circle centered on the fiberscope. While locking the movable member in a state where the movable member approaches the fixed member,
A locking member is provided for releasing the locking of the movable member when a biasing force having a magnitude greater than or equal to a predetermined value is applied to the movable member in a direction of separating the movable member from the fixed member. The in-pipe investigation apparatus according to any one of claims 1 to 3. It is provided in the investigation target member having a tube shape and can be inserted into a hole penetrating the tube wall of the investigation target member, and the distal end portion is inserted into the hole and introduced into the investigation target member. A guide member for guiding the positions of the fiberscope and the wire wires;
Bending means for bending the tip portion of the guide member in a predetermined direction;
The in-pipe investigation apparatus according to any one of claims 1 to 4, further comprising:   The in-pipe investigation apparatus according to claim 1, wherein the fiberscope is provided with a scale indicating a distance from a tip of the fiberscope.

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