JP2015096707A - Device and method for inspecting vertical shaft pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection device of a vertical shaft pump which easily and accurately inspects the internal situation of the vertical shaft pump and is advantageous in costs.SOLUTION: An inspection device of a vertical shaft pump includes: a rail 31 horizontally disposed in a pump casing 2; an inspection port fixture 32 which is attached to one end part of the rail 31 and used for fixing the rail 31 to an inspection port 19 provided at the pump casing 2; an inner surface fixture 33 which is attached to the other end part of the rail 31 and used for fixing the rail 31 to an inner surface of the pump casing 2; and an inspection unit 35 capable of moving on the rail 31 in a horizontal direction. The inspection unit 35 includes an imaging apparatus 36 for capturing images in the pump casing 2, and the imaging apparatus 36 is formed so as to move in the pump casing 2 in a vertical direction.

Description

  The present invention relates to an inspection device for inspecting the inside of a vertical shaft pump for transferring river water or the like. Moreover, it is related with the inspection method of a vertical shaft pump using such an inspection apparatus.

  Conventionally, for the purpose of transferring liquids such as river water, drainage facilities have been installed in various places and vertical shaft pumps have been used. In this vertical shaft pump, a suspension pipe is generally installed on the pump installation floor above the suction water tank, and an impeller casing that houses the impeller is connected below the suspension pipe. Since the vertical shaft pump having such a structure is operated in a state in which the impeller and the underwater bearing are immersed in water, the members constituting the vertical shaft are gradually worn as the operation time elapses. Moreover, corrosion may occur in the suspension pipe, impeller casing, impeller, and the like. For this reason, it is necessary to periodically perform internal inspections of the vertical shaft pump to grasp the state of wear and the occurrence of corrosion in the impeller and the impeller casing, and to repair or replace them as necessary.

There is a method for overhauling the vertical shaft pump with a crane or the like to accurately grasp the wear status and corrosion occurrence status of the vertical pump. Although this method can accurately check the internal wear and corrosion occurrence, it has the following problems.
(1) For the lifting operation using a crane, a large number of workers are required for disassembling the vertical shaft pump, which increases the work cost.
(2) The work of confirming the wear and corrosion status includes many operations such as raising the vertical shaft pump, checking, re-installing the vertical shaft pump, centering the rotating shaft of the impeller and the driving source and the driving shaft of the speed reducer, and trial operation. It takes a lot of days because work is required. In the meantime, since the vertical pump cannot be operated, the drainage facility in which the vertical pump is installed is placed in a state where it cannot respond to an urgent drainage request.
(3) Because the vertical shaft pump is large and heavy, there is always a danger in lifting and disassembling the vertical shaft pump.

  As a method of performing internal inspections without installing the vertical pump, an inspection port (hand hole) installed in the discharge bend pipe connected to the upper end of the suspension pipe is used as a method for inspecting the equipment while it is installed. There is a method of observing the inside. With this method, it is possible to carry out an internal inspection easily and inexpensively. However, with this method, it is difficult to reach the imaging device to a desired observation target position (for example, a position where wear or corrosion has occurred), and there are cases where observation cannot be performed sufficiently. Conventionally, the position of observation and the direction in which the imaging device is facing are determined from the obtained image and the experience of the operator. It was difficult.

  In Patent Document 1, a magnetic attraction force is applied to a pump casing, which is a magnetic body, and a camera is mounted on a carriage that can move along the surface of the pump casing. A configuration to observe is disclosed. In such a configuration, the position of the camera can be specified relatively easily, but the observation position may not be specified accurately. Further, the range in which the carriage can move is limited, and it has been difficult to observe all the directions in the pump casing.

JP 2009-150262 A

  The present invention has been made in view of the above-described conventional problems, and provides an inspection apparatus for a vertical pump that can easily and accurately check the internal state of the vertical pump and that is advantageous in terms of cost. With the goal. Moreover, an object of this invention is to provide the inspection method of a vertical shaft pump using such an inspection apparatus.

  One aspect of the present invention for solving the above-described problems is a rail that is horizontally disposed in a pump casing, and is attached to one end of the rail, and the rail is fixed to an inspection port provided in the pump casing. An inspection port fixture for fixing the rail, an inner surface fixture for fixing the rail to the inner surface of the pump casing, and an inspection unit movable horizontally on the rail. The inspection unit includes a photographing device for photographing an image inside the pump casing, and the photographing device is configured to be movable in the vertical direction in the pump casing. It is an inspection device.

In a preferred aspect of the present invention, the inner surface fixture has a magnet, and the inner surface fixture is fixed to the inner surface of the pump casing by the magnet.
In a preferred aspect of the present invention, the photographing apparatus is any one of an underwater camera, a three-dimensional measuring instrument, and an endoscope.
In a preferred aspect of the present invention, the apparatus further includes a movement amount measuring device for measuring the movement amount of the photographing apparatus.
In a preferred aspect of the present invention, a gyro sensor or a nine-axis sensor for measuring a direction in which the photographing apparatus is facing is further provided.

In a preferred aspect of the present invention, the photographing apparatus is further provided with rotating means capable of rotating the imaging apparatus 360 degrees in the horizontal direction.
In a preferred aspect of the present invention, the inspection unit includes a rod-shaped member disposed across the rail, and a guide cable that is suspended from the rod-shaped member and passed through through holes provided at both ends of the imaging device. And further comprising.
In a preferred aspect of the present invention, one end of the guide cable is connected to the rod-shaped member, and a weight is connected to the other end.

In a preferred aspect of the present invention, the inspection unit further includes an ejection unit that ejects a fluid such as water or air to the imaging apparatus.
In a preferred aspect of the present invention, the image processing apparatus further includes a storage unit that stores an image acquired by the imaging apparatus.
In a preferred aspect of the present invention, the image capturing apparatus further includes a storage unit that stores the depth of the corrosion site acquired.
In a preferred aspect of the present invention, the image display device further includes an image display that displays the image stored in the storage unit along a time axis.
A preferred aspect of the present invention is characterized by further comprising an image display for displaying the depth of the corrosion site stored in the storage unit along the time axis.

  Another aspect of the present invention is an inspection method for inspecting the inside of a pump casing of a vertical shaft pump, wherein the inspection device is fixed to an inspection port provided in the pump casing and an inner surface of the pump casing, and the pump This is a vertical pump inspection method for inspecting the inside of the pump casing by inserting a photographing device for photographing an image inside the pump casing inside the casing.

  According to the present invention, the inspection unit attached to the rail is moved in the horizontal direction, and the imaging device included in the inspection unit is moved downward from the desired horizontal position, so that the imaging device is moved to the desired position of the pump casing. Since it is possible to easily reach the inspection position, it is possible to accurately observe the internal state of the vertical shaft pump. In particular, by combining with a moving amount measuring device, a gyro sensor, or a 9-axis sensor, it is possible to accurately grasp the position and direction of the photographing device, so that the exact position of the photographed image can be specified. Moreover, since the installation of the inspection device is completed simply by inserting the inspection device from the inspection port and fixing it to the pump casing, it is possible to perform internal inspection at a low cost and in a short time.

It is sectional drawing which shows the whole structure of a vertical shaft pump. It is the schematic which shows a mode that the inspection apparatus of the vertical shaft pump of this invention was inserted in the vertical shaft pump. It is a schematic perspective view of the inspection apparatus of the vertical shaft pump of this invention. It is a schematic sectional drawing which shows the horizontal cross section of the said pump casing of the state in which the inspection apparatus of the vertical shaft pump of this invention was inserted in the pump casing. It is the enlarged view which looked at the upper part of the inspection unit from the direction of the inspection port fixture. It is the schematic which shows the state in which the inspection port fixing tool is attached to the inspection port provided in the pump casing. It is the schematic perspective view which showed a mode that an inner surface fixing tool rotated centering on the pivot axis | shaft provided in the center part. It is the schematic perspective view which showed another example of the inner surface fixing tool. It is the schematic which showed a mode that an imaging device moved up and down the inside of a pump casing via a moving amount measuring apparatus. It is an expansion perspective view which shows the imaging device of an inspection apparatus. It is an expansion perspective view which shows the other example of the imaging device of an inspection apparatus. It is a figure which shows the example in which the positional information on an imaging device is displayed on the tablet type terminal device. FIG. 13A is a schematic diagram for explaining an example of the X direction and the Y direction defined in the pump casing, and FIG. 13B explains an example of the Z direction defined in the pump casing. It is a schematic diagram for doing. It is the schematic which illustrated the example in which the injection part which injects fluids, such as water or air, is provided in the image acquisition part of an imaging device. It is a schematic sectional drawing which shows the horizontal cross section of the said pump casing of the state in which the inspection apparatus of the vertical shaft pump which concerns on another embodiment of this invention was inserted in the pump casing.

  Hereinafter, an inspection apparatus and an inspection method for a vertical shaft pump according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the overall configuration of the vertical shaft pump. As shown in FIG. 1, the vertical shaft has an impeller casing 1 having a suction bell mouth 1 a and a pump bowl 1 b, a suspension pipe 3 for suspending the impeller casing 1 in a suction water tank 5, and an upper end of the suspension pipe 3. A discharge curved pipe 4 to be connected, an impeller 10 accommodated in the impeller casing 1, and a rotating shaft (main shaft) 6 to which the impeller 10 is fixed are provided. The suspension pipe 3 extends downward through an insertion port 24 formed in the pump installation floor 22 at the upper part of the suction water tank 5, and is connected to the pump installation floor 22 via an installation base 23 provided at the upper end of the suspension pipe 3. Fixed. The rotary shaft 6 extends in the vertical direction through the discharge curved pipe 4, the suspension pipe 3, and the impeller casing 1. The pump casing 2 includes an impeller casing 1, a suspension pipe 3, and a discharge curved pipe 4.

  The suction bell mouth 1a opens downward, and the upper end of the suction bell mouth 1a is connected to the lower end of the pump bowl 1b. The impeller 10 is fixed to the lower end of the rotating shaft 6, and the impeller 10 and the rotating shaft 6 rotate integrally. A plurality of guide vanes 14 are arranged above the impeller 10 (discharge side). These guide vanes 14 are fixed to the inner peripheral surface of the pump bowl 1b. The rotating shaft 6 is rotatably supported by an outer bearing 11 and an underwater bearing 12. The underwater bearing 12 is accommodated in the pump bowl 1 b and is disposed above the impeller 10. The support member 7 that supports the underwater bearing 12 is fixed to the inner surface of the bowl bush 13, and the bowl bush 13 is supported by the impeller casing 1 via a guide vane 14. The outer bearing 11 is a rolling bearing such as a ball bearing, and the underwater bearing 12 is a so-called sliding bearing that is in sliding contact with the rotating shaft 6. Reference numeral 19 denotes an inspection port (handhole).

  The rotary shaft 6 protrudes upward from the discharge curved pipe 4 and is connected to a drive source 18. When the impeller 10 is rotated through the rotating shaft 6 by operating the drive source 18, water (handling liquid) in the suction water tank 5 is sucked from the suction bell mouth 1a, and the pump bowl 1b, the suspension pipe 3, It is transferred to the discharge pipe 20 through the discharge curved pipe 4. During operation of the vertical shaft pump, the impeller casing 1 that houses the impeller 10 is positioned below the liquid level.

  Next, an inspection device for inspecting the inside of the vertical shaft pump having such a configuration will be described. FIG. 2 is a schematic view showing a state in which the vertical pump inspection device of the present invention is inserted into the vertical pump. FIG. 3 is a schematic perspective view of the vertical pump inspection device of the present invention, and FIG. 4 is a schematic cross-sectional view showing the horizontal cross section of the vertical pump in the state where the vertical pump inspection device of the present invention is inserted into the pump casing. FIG.

  As shown in FIG. 2, an inspection port (hand hole) 19 is provided in the discharge curved pipe 4 of the pump casing 2, and an inspection device 30 is inserted through the inspection port 19. The inspection device 30 has a rail 31 having a length longer than the inner diameter of the pump casing 2. The rail 31 is disposed horizontally in the pump casing 2. An inspection port fixture 32 for fixing the rail 31 to the inspection port 19 is attached to one end of the rail 31. Further, an inner surface fixing tool 33 for fixing the rail 11 to the inner surface of the pump casing 2 is attached to the other end portion of the rail 31. An inspection unit 35 that can move horizontally on the rail 31 is provided. The inspection unit 35 includes a photographing device 36 for photographing an image in the pump casing 2, and the photographing device 36 is configured to be movable in the vertical direction in the pump casing 2.

  FIG. 5 is an enlarged view of a part of the upper side of the inspection unit 35 as viewed from the direction of the inspection port fixture 32. As shown in FIG. 5, the inspection unit 35 includes a bar-like member 41 arranged across the rail 31, two roller support jigs 37, 37 extending downward from the approximate center of the bar-like member 41, and two Are provided with two rollers 38 and 38 respectively attached to the roller support jigs 37 and 37 via the rotary shaft 32. The rollers 38 are rotatably fitted in horizontal grooves formed on both side surfaces of the rail 31 having an I-shaped cross section. The rod-like member 41 is also provided with pulley support jigs 48 and 48 to which the rotary shaft 39 of the pulley 40 is rotatably attached. The operation cable 43 is supported on the pulley 40 so that the pulley 40 can move in the longitudinal direction of the rail 31. An end portion of the operation cable 43 is connected to the photographing device 36 (see FIG. 3). The operation cable 43 is a power cable for the photographing device 36 and a data cable for sending various data including images from the photographing device 36. Including.

  Further, guide cables 45, 45 are suspended from both ends of the rod-shaped member 41, and the guide cables 45, 45 are respectively passed through through holes 47, 47 provided at both ends of the photographing device 36. (See FIG. 3). One end of the guide cables 45, 45 is connected to the rod-like member 41, and weights 44, 44 are connected to the other end. Each of the weights 44 and 44 preferably has a weight of about 2 to 3 kg, and the upper limit is preferably about 5 kg. Note that the posture of the photographing device 36 may be stabilized by fixing the lower end portion using an electromagnet instead of the weights 44 and 44. If the weights 44 and 44 are provided at the ends of the guide cables 45 and 45 in this way, it helps to stabilize the posture of the photographing apparatus 36 that moves up and down as guided by the guide cables 45 and 45.

  As shown in FIG. 6, the inspection port fixture 32 sandwiches the edge of the inspection port 19 provided in the pump casing 2 from the thickness direction using screws 60 and 60. If the screws 60 are loosened, the inspection port fixture 32 can be removed from the pump casing 2. In this way, one end of the rail 31 of the inspection device 30 is detachably fixed to the pump casing 2. On the inspection port fixture 32, a guide portion 61 into which the rail 31 is fitted is fixed. With the rail 31 fitted in the guide portion 61, the rail 31 can be moved in the longitudinal direction. The rail 31 can be fixed to the guide portion 61 by the rail positioning screw 62 after the rail 31 is pushed in until the inner surface fixing tool 33 described later comes into contact with the inner wall of the pump casing 2.

  The inner surface fixing tool 33 provided at the other end of the rail 31 has a magnet, and the inner surface fixing tool 33 is fixed to the inner surface of the pump casing 2 that is a magnetic body by the magnet. When the magnet is an electromagnet, the inner surface fixture 33 is fixed to the inner surface of the pump casing 2 by exciting the electromagnet. Furthermore, the inner surface fixing tool 33 can be easily removed from the pump casing 2 by stopping energization of the electromagnet. In this way, the other end of the rail 31 is detachably fixed to the inner surface of the pump casing 2. As shown in FIG. 7, the inner surface fixing tool 33 is configured to be pivotable about a pivot shaft 34 provided at the center thereof, so that the outer surface of the inner surface fixing tool 33 is shown in FIG. 4. Is fixed to the inner surface of the pump casing 2. A mark for specifying a fixing position where the inner surface fixing tool 33 is fixed may be provided on the inner surface of the pump casing 2.

  As a modified example of the inner surface fixing tool 33, an inner surface fixing tool 33 provided with a V-shaped arm 39 as shown in FIG. 8 may be used. The V-shaped arm 39 is configured to be rotatable about a pivot shaft 34 provided at the apex thereof. Magnets or electromagnets are attached to the tip portions 46 of the two arms extending in a V shape. Even when the inspection device 30 is applied to a vertical shaft pump having a different inner diameter of the pump casing 2 by using the inner surface fixing tool 33 having such a V-shaped arm 39, the rail 31 of the inspection device 30 is connected to the pump casing 2. It becomes possible to fix to the inner surface of. Therefore, the versatility of the inspection device 30 is improved.

  Examples of the imaging device 36 include an underwater camera, a three-dimensional measuring instrument, and an endoscope such as a fiberscope. An underwater camera, a three-dimensional measuring instrument, and an endoscope may all be prepared, and these may be replaced as necessary. With such a photographing device 36, the photographed image is transmitted to the ground image display 70 (see FIG. 2) via the operation cable 43. When an underwater camera or endoscope is used for the imaging device 36, the image acquired from the imaging device 36 is a two-dimensional image. On the other hand, when a three-dimensional measuring instrument is used for the imaging device 36, a three-dimensional image is acquired by the three-dimensional measuring instrument, and in addition to this, data such as depth and size of wear and corrosion are quantitatively analyzed. Can get to. The three-dimensional measuring instrument has two cameras with parallax, and can measure the distance and depth from the images obtained by the two cameras using a triangulation method. A commercially available one can be used as such a three-dimensional measuring instrument. In addition to the camera-type three-dimensional measuring device, a fiberscope-type three-dimensional measuring device may be used.

  In order to ascertain how deep the imaging device 36 is descending in the pump casing 2, as shown in FIG. 9, the movement amount of the operation cable 43, that is, the movement of the imaging device 36 within the pump casing 2. A moving amount measuring device 55 for measuring the amount can be provided. The movement amount measuring device 55 has a roller (not shown) that rotates as the operation cable 43 moves, and measures the movement amount of the photographing device 36 based on the rotation amount of the roller. If such a movement amount measuring device 55 is provided, accurate position information in the pump casing 2 of the photographing device 36 can be acquired.

  Instead of or in combination with the movement amount measuring device 55, a gyro sensor or a nine-axis sensor (3-axis acceleration + 3-axis angular velocity + 3-axis geomagnetism) 56 may be mounted on the photographing device 36 (see FIG. 9). The gyro sensor and the 9-axis sensor 56 are sensors capable of acquiring an angle from the reference direction. If such a gyro sensor or 9-axis sensor 56 is mounted, it is possible to specify which direction the photographing device 36 is facing. As described above, since accurate position information and direction information of the imaging device 36 can be obtained, it is possible to accurately specify a position where wear or corrosion occurs from an image captured by the imaging device 36.

  Next, means for rotating the photographing device 36 in a desired direction will be described. FIG. 10 is an enlarged perspective view showing the imaging device 36 of the inspection device 30. As shown in FIG. 10, the through-hole portions 47 and 47 are connected to each other by a bridge 52 that extends horizontally. Two arms 53, 53 extend downward from the bridge 52, and a stepping motor 50 that is a rotating means is held by the arms 53, 53. The rotation axis of the stepping motor 50 extends in the vertical direction and is fixed to the attachment 51 through a through hole provided in the bridge 52. The imaging device 36 is fixed to the attachment 51 using a fixing tool such as a screw. When the stepping motor 50 is rotated, the photographing device 36 is rotated together with the attachment 51. A gyro sensor or 9-axis sensor 56 is attached to the imaging device 36, and an angle from the reference direction of the imaging device 36 is obtained by the gyro sensor or 9-axis sensor 56. With such a configuration, the stepping motor 50 can rotate the imaging device 36 360 ° in the horizontal direction, so that the inside of the pump casing 2 can be easily inspected. A normal motor can be used as the rotating means. However, when a stepping motor is used, the photographing device 36 can be rotated every 0.1 °, for example, so that the inspection position can be accurately specified. It is preferable to use a stepping motor.

  FIG. 11 is an enlarged perspective view showing another example of the photographing device 36. The imaging device 36 shown in FIG. 10 is a three-dimensional camera as a three-dimensional measuring instrument, while the imaging device 36 shown in FIG. 11 is an endoscope such as a fiber scope. As shown in FIG. 11, an imaging device 36 composed of an endoscope is fixed to an attachment 51 that rotates as the stepping motor 50 operates. Therefore, the stepping motor 50 can rotate the photographing apparatus 36 by 360 ° in the horizontal direction. A gyro sensor or 9-axis sensor 56 is attached to the attachment 51, and the angle of the imaging device 36 from the reference direction is acquired by the gyro sensor or 9-axis sensor 56.

  The image acquired by the imaging device 36 and the position information and direction information by the movement amount measuring device 55 and the gyro sensor or 9-axis sensor 56 are displayed on an image display 70 (see FIG. 2) on the ground floor such as the pump installation floor 22. It is transmitted via the operation cable 43. The worker can obtain this information from the image display 70. As the image display 70, for example, a personal computer display or a tablet-type terminal device can be employed. An example in which the position information of the photographing device 36 is displayed on the tablet terminal device is shown in FIG. In FIG. 12A, the position of the photographing device 36 is displayed as coordinates of the X, Y, and Z axes from the reference point, and the direction of the photographing device 36 is indicated by an angle from the reference direction. In FIG. 12B, the position and direction of the imaging device 36 are indicated by a point in the schematic diagram of the pump casing 2 shown on the tablet terminal device 70 and an arrow attached to the schematic diagram of the imaging device 36.

  The position of the imaging device 36 in the pump casing 2 is expressed as a position in the X direction, the Y direction, and the Z direction from a reference point defined in advance in the pump casing 2. FIG. 13A is a schematic diagram for explaining an example of the X direction and the Y direction defined in the pump casing, and FIG. 13B illustrates an example of the Z direction defined in the pump casing. It is a schematic diagram for. In the example shown in FIGS. 13A and 13B, the reference point is set at the intersection of the horizontal plane passing through the center of the inspection port 19 and the axis of the rotation shaft 6. The X direction is a direction from the reference point toward the center of the inspection port 19, and the Y direction is perpendicular to the X direction and is a horizontal direction. The Z direction is a direction in which the axis of the rotation shaft 6 extends. These X direction, Y direction, and Z direction are orthogonal to each other.

  The image display 70 is connected to the photographing device 36 and the gyro sensor or 9-axis sensor 56 via the operation cable 43 described above, and is further connected to the movement amount measuring device 55. The image display 70 obtains the position of the photographing device 36 from the measured value of the movement amount obtained by the movement amount measuring device 55, and the position information is obtained from the reference point in the X direction and Y direction as shown in FIG. Displayed as coordinates in direction and Z direction. Further, the image display 70 displays the angle information of the photographing device 36 obtained from the gyro sensor or the 9-axis sensor 56 as shown in FIG. As described above, the image display 70 can acquire and display the three-dimensional position information and direction information of the photographing device 36.

  The image display 70 stores an image captured by the imaging device 36, a time when the image was captured, position information and direction information of the imaging device 36 (hereinafter collectively referred to as image information), and a storage unit 71. (See FIG. 2). The storage unit 71 may be provided separately from the image display device 70. Image information stored in the storage unit 71 can be displayed on the image display 70. As described above, since the accurate position of the imaging device 36 can be grasped, it is possible to accurately identify the position of a defect such as wear or corrosion found in the periodic inspection. Therefore, it is possible to grasp the time-series change of the defect, that is, the progress of the defect. For example, an image of a specific location can be recorded along with the time when the image was acquired, and the image can be displayed on the image display 70 along the time axis. Furthermore, for each periodic inspection, the depth of corrosion at a specific location is measured, the depth is recorded with time, and the depth of the location that has been corroded is displayed on the image display 70 along the time axis. Thus, the tendency of corrosion can be grasped. Therefore, it is possible to predict the repair time and replacement time of the components of the vertical shaft pump. In particular, the vertical shaft pump is a very large structure, and it may take time to manufacture and procure the target part when repairing or exchanging. Therefore, it is very useful if the repair time and replacement time can be predicted. In addition, when the worker shows the stored image information to the administrator of the pump, it is possible to present the degree of occurrence and the position of the defect, and to present a convincing test result.

  It is preferable that the image information stored in the image display device 70 can be transmitted to the outside via a communication unit. As the communication means, the Internet, a wired LAN, a wireless LAN, or the like can be used. If the image information can be transmitted to the outside in this way, it is possible to share the image information with all persons who are far away. In particular, when the operator has little experience, appropriate advice and evaluation can be obtained by showing image information to other experienced workers. Moreover, even when the user of the vertical pump is far away, the work status and the failure occurrence state can be immediately transmitted to the user.

  FIG. 14 is a schematic diagram illustrating an example in which an ejection unit 90 that ejects a fluid such as water or air is provided in an image acquisition unit (a lens unit of a camera or an endoscope) 80 of the imaging device 36. When the inside of the pump casing 2 of the vertical shaft pump is inspected using the inspection device 30, the image acquisition unit 80 of the imaging device 36 may become dirty. This is because the liquid to be transferred is dirty. In such a case, fluid such as water or air is ejected from the ejection unit 90 to the image acquisition unit 80 of the imaging device 36 to clean the image acquisition unit 80. The operation of the ejection unit 90 can be performed using the image display 70 as shown in the figure.

  FIG. 15 is a schematic cross-sectional view illustrating a horizontal cross section of the pump casing 2 in a state where the vertical pump inspection device 30 according to another embodiment of the present invention is inserted into the pump casing 2. As shown in FIG. 15, in this embodiment, the rail 31 of the inspection device 30 is bent so as to bypass the rotating shaft 6. By comprising in this way, it can avoid that the inspection unit 35 contacts the rotating shaft 6. FIG.

  The work procedure will be described below (see FIG. 2). The inspection port 19 is normally closed with a lid. When performing an inspection using the inspection device 30, first, the lid is removed and the inspection port 19 is opened. Next, the inspection device 30 is inserted into the pump casing 2. At this time, the position of the inner surface fixing tool 33 is aligned with a mark (not shown) provided on the inner surface of the pump casing 2, and the inner surface fixing tool 33 is fixed to the inner surface of the pump casing 2. Thereafter, by tightening the screws 60, 60 of the inspection port fixture 32, the edge of the inspection port 19 is sandwiched from the thickness direction. Thereby, fixation of the inspection apparatus 30 is completed.

  Next, the inspection unit 35 is moved horizontally on the rail 31 to move the inspection unit 35 to a desired horizontal position. At this time, the inspection unit 35 is moved by pushing the inspection unit 35 with a stick or the like. This horizontal movement distance is measured by the movement amount measuring device 55. When the inspection unit 35 is moved to the desired horizontal position, the photographing device 36 is lowered to the desired inspection position by extending the operation cable 43. In particular, since the impeller casing 1 and the impeller 10 are likely to be corroded and worn, it is preferable to lower the photographing device 36 to these positions. This descending distance is measured by the movement amount measuring device 55. Further, the photographing device 36 is rotated by using the rotating means 50, and the surrounding state of the photographing device 36 is observed and grasped. At this time, the rotation angle of the photographing device 36 is measured by the gyro sensor or the nine-axis sensor 56.

  When a three-dimensional measuring instrument is used as the imaging device 36, the magnitude and depth of wear and corrosion can be measured. These malfunction images and measurement data are stored in the storage unit 71 of the image display 70 and are used to predict the repair time and replacement time. Also, this image information can be transmitted to the outside via a communication means. In particular, when there is little experience of a worker working in the field, it is possible to seek diagnosis of an experienced worker who is outside.

  When the inner diameter of the pump casing 2 is small, the inspection can be performed by one measurement by rotating the photographing device 36 by 360 °. On the other hand, the inspection as described above can be repeated. For example, after inspecting the inside of the pump casing 2 behind the rotating shaft 6 with respect to the inspection port 19, the inspection unit 35 is drawn toward the front, and the pump closer to the inspection port 19 than the rotating shaft 6 is pulled forward. The inside of the casing 2 can be inspected.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible.

DESCRIPTION OF SYMBOLS 1 Impeller casing 2 Pump casing 6 Rotating shaft 10 Impeller 19 Inspection port (hand hole)
DESCRIPTION OF SYMBOLS 30 Inspection apparatus 31 Rail 32 Inspection port fixing tool 33 Inner surface fixing tool 35 Inspection unit 36 Image pickup device 37 Roller support jig 38 Roller 39 V-shaped arm 40 Pulley 41 Bar-shaped member 43 Operation cable 44 Weight 45 Guide cable 46 Tip part 47 Through Hole part 48 Pulley support jig 50 Rotating means 51 Attachment 52 Bridge 53 Arm 55 Movement amount measuring device 60 Screw 61 Guide part 62 Rail positioning screw 70 Image display 71 Storage part 80 Image acquisition part 90 Injection part

Claims (14)

Rails arranged horizontally in the pump casing;
An inspection port fixture for fixing the rail to an inspection port attached to one end of the rail and provided in the pump casing;
An inner surface fixing tool attached to the other end of the rail, and for fixing the rail to the inner surface of the pump casing;
An inspection unit movable in the horizontal direction on the rail,
The inspection unit includes a photographing device for photographing an image inside the pump casing,
2. The vertical shaft pump inspection device according to claim 1, wherein the photographing device is configured to be movable in the vertical direction in the pump casing.   The vertical shaft pump inspection device according to claim 1, wherein the inner surface fixing tool includes a magnet, and the inner surface fixing tool is fixed to an inner surface of the pump casing by the magnet.   The vertical shaft pump inspection device according to claim 1, wherein the photographing device is one of an underwater camera, a three-dimensional measuring instrument, and an endoscope.   The vertical pump inspection device according to any one of claims 1 to 3, further comprising a moving amount measuring device for measuring a moving amount of the photographing device.   The vertical pump inspection device according to any one of claims 1 to 4, further comprising a gyro sensor or a nine-axis sensor for measuring a direction in which the photographing device is facing.   The vertical pump inspection device according to any one of claims 1 to 5, further comprising a rotating unit capable of rotating the photographing device in a horizontal direction by 360 °.   The inspection unit further includes a rod-like member disposed across the rail, and guide cables suspended from the rod-like member and passed through through-hole portions provided at both ends of the imaging device. The vertical shaft pump inspection device according to any one of claims 1 to 6, wherein the vertical shaft pump inspection device is characterized.   The vertical shaft pump inspection device according to claim 7, wherein one end of the guide cable is connected to the rod-shaped member, and a weight is connected to the other end.   The vertical shaft pump inspection device according to any one of claims 1 to 8, wherein the inspection unit further includes an injection unit that injects a fluid such as water or air to the imaging device.   The vertical pump inspection device according to any one of claims 1 to 9, further comprising a storage unit that stores an image acquired by the imaging device.   The vertical shaft pump inspection apparatus according to any one of claims 1 to 10, further comprising a storage unit that stores a depth of a corrosion portion acquired by the imaging device.   The vertical shaft pump inspection apparatus according to claim 10, further comprising an image display that displays an image stored in the storage unit along a time axis.   The vertical pump inspection device according to claim 11, further comprising an image display that displays the depth of the corrosion location stored in the storage unit along a time axis. An inspection method for inspecting the inside of a pump casing of a vertical shaft,
The inspection device according to any one of claims 1 to 13 is fixed to an inspection port provided in the pump casing and an inner surface of the pump casing, and an image inside the pump casing is displayed inside the pump casing. An inspection method of a vertical shaft pump that inspects the inside of the pump casing by inserting an imaging device for imaging.

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