JPH01123105A - Test jig of submerged rod part - Google Patents

Abstract

PURPOSE:To improve testing efficiency and accuracy by a method wherein a holder which holds test devices, a guide for guiding the holder freely up and down, and a support which supports the guide in a suspending position are set on a submerged rod part. CONSTITUTION:A band 15 is tied ad fixed just above a part to be surface- treated and tested above the water on a steel pipe 1. A holder 2 is provided with a surface treatment tool 9/test probe 10. Then a hook-shaped joint of a jig 3 is hooked on a brim 15a of the band 15 and the jig 3 is suspended on the steel pipe 1. A V-shaped legs 8 on a bottom beam 6 are made into contact with the steel pipe 1 so that they straddle the pipe. Therefore, the jig 3 is maintained parallel to the steel pipe 1 being suspended. This installation is performed on the water, on a boat or the like. Then by remote-controlling an up-and-down device from the boat, and driving a motor 13 to rotate a screw 11 clockwise and counterclockwise, the holder can be moved up and down along a guide frame 4 and the tool 9/probe 10 is operated to perform a required work.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a jig for inspecting underwater rod-shaped members such as underwater steel pipe piles or underwater piping for supporting floating structures.

<Conventional technology> Supporting water structures in port facilities, river facilities, etc.
゛The vicinity of the water surface of pipe members that extend from above the water to below the water surface, such as submersible steel pipe piles for support or the rising parts of submersible pipes, or members of a similar shape, that is, the splash zone, is subject to severe damage and corrosion due to waves, so avoid rust. There are surface treatments such as removal and removal of attached organisms.

Incidentally, these surface treatments and inspections are underwater operations that require specialized techniques, and conventionally have been carried out through collaboration between diving invectors or dialers and engineers on the water (PETOROTEC).
H Vol. 10, No. 5, pp. 68-73 (see New Inspection Technology "Underwater Inspection").

<Problems to be Solved by the Invention> However, the conventional underwater work described above has many problems as described below.

(1) Cooperative play between underwater and above water tends to lack thoroughness.

(2) The number of so-called diving invectors who have both diving and inspection skills is extremely small.

(3) Efficiency and work accuracy for underwater work depend on water temperature and water flow.

It depends on the natural environment such as waves and transparency.

(4) Depending on the state of water contamination, it may have a negative impact on the health of underwater workers.

(5) Remotely controlled unmanned aerial vehicles, submersible atmospheric pressure diving elevators, etc. are also used when drilling offshore drilling rigs, etc., to target deep water depths, but the equipment is large-scale and cannot be used in general port facilities or rivers. It is not necessarily suitable for facilities, etc.

Therefore, in view of the above-mentioned conventional situation, the present invention is applicable to inspection and surface treatment of underwater rod-like members extending from above the water to below the water surface, such as underwater steel pipe piles for supporting floating structures or rising parts of underwater piping. To provide an inspection jig that allows an operator to set inspection means and surface treatment means on an underwater rod-like member and remotely control them while on the water of a ship or the like, without having to go underwater.

<Means for Solving the Problems> Therefore, the present invention provides a holder for holding at least one of a surface treatment means and an inspection means for an underwater rod-like member extending from above water to below the water surface, and a holder for holding at least one of a surface treatment means and an inspection means for an underwater rod-like member, and a method for attaching the holder to the underwater rod-like member. A jig main body includes a guide part that can be guided freely up and down along the underwater rod-like member, and support parts that are attached to the underwater rod-shaped part below the water surface and above the water surface and support the guide part in a suspended state, and a jig main body that can move the holder up and down. This is a jig for inspecting an underwater rod-shaped member, which includes a vertical movement device for vertical movement, and a holder position detection means.

<Operation> When performing surface treatment or inspection of an underwater rod-shaped member, a surface treatment means, an inspection means, or both are set in the holder depending on the purpose of the work. Next, by attaching the support portions of the jig body to the underwater rod-like member below the water surface and above the water, the guide portion is supported in a suspended state by the underwater rod-like member. Then, while the holder is moved up and down by the up and down movement device, the surface treatment means and/or inspection means are activated to perform the required work.

In this case 1. The position of the surface treatment means and/or the inspection means is detected by the holder position detection means, and it is possible to know at what position on the surface of the rod-shaped member these means are in contact.

<Example> Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2 showing an embodiment of the present invention, the inspection jig for an underwater rod-like member includes at least one of a surface treatment means and an inspection means for a steel pipe l as an underwater rod-like member extending from above the water to below the water surface. a holder 2 for holding the holder 2, a guide section that guides the holder 2 in a vertically movable manner along the steel pipe 1, and a support that is attached to a portion below and above the water surface of the steel pipe 1, respectively, and supports the guide section in a suspended state. The jig body 3 includes a jig main body 3 having a section and a vertical movement device that moves the holder 2 up and down.

Here, the detailed structure of the jig main body 3 will be explained.

That is, a platform 5 that functions as a mounting base for the support section, the vertical movement device, etc. is fixedly installed on the upper part of the cylindrical guide frame 4 as the guide section. Further, at the lower part of the guide frame 4, an upper girder 6 is fixedly installed, which functions as a mounting base for the support section, vertical movement device, etc.

At the inner end of the platform 5, a hook-shaped connecting means 7 serving as a support section is formed to protrude forward. Further, at the inner end of the upper beam 6, a V-shaped leg 8 serving as a support portion is formed to protrude forward in parallel with the connecting means 7.

A guide hole 2A is formed through the holder 2 and is slidably inserted into the guide frame 4. or,
At least one of a surface treatment tool 9 as the surface treatment means and an inspection probe 10 as the inspection means is attached to the inner end of the holder 2.

The surface treatment tool 9 and the inspection probe 10 are connected to a surface treatment device and an inspection device on the water such as a work boat, so that surface treatment and inspection operations can be performed remotely.

Measurement data and other inspection information are transmitted over the water using electrical signals or the like.

Next, the detailed structure of the vertical movement device for the holder 2 will be explained.

The vertical movement device of this embodiment moves the holder 2 up and down by rotation of the feed screw 11.

That is, the feed screw 11 is disposed parallel to the guide direction, that is, parallel to the guide frame 4, passing through the holder 2,
Both ends thereof are rotatably supported by bearings 16 built into the platform 5 and the upper girder 6, respectively. The outer peripheral male threaded portion 11a of the feed screw 11 is screwed into the female threaded portion of the inner peripheral surface of the threaded hole 12a of the slide nut 12 incorporated in the guide frame 4.

On the other hand, a motor 13 serving as a driving means is fixedly held on the upper surface of the platform 5 via a mount 14, and an end portion of a feed screw 11 protruding from the platform 5 is connected to a rotating drive shaft 13a of the motor 13.

A mounting band 15 for suspending and supporting the jig main body 3 as described above is fixedly attached to the outer periphery of the steel pipe 1.

This mounting band 15 is constituted by two split rings 15A and 15B having a radius of curvature matching the outer diameter of the steel pipe 1.

These rings 15A and 15B have a collar portion 15 that protrudes upward at the portion that becomes the outer edge when attached to the steel pipe 1.
a is formed, and a hook-shaped connecting means 7 at the inner end of the platform 5 is fitted into this flange 15a.

Note that the V-shaped #8 at the inner end of the upper girder 6 abuts on the steel pipe 1 so as to straddle it, and holds the jig main body 3 parallel to the steel pipe 1.

In the figure, 17 is a non-contact tachometer as a holder position detection means for detecting the position of the holder 2, which detects the position of the surface treatment tool 9 and the inspection probe 10. It is.

In this case, the position of the holder 2 when the feed screw 11 starts rotating is specified, and the number of rotations of the feed screw 110 is measured using the non-contact tachometer 17.
“Detect” the position of.

Next, a method of using the inspection jig having such a configuration will be explained.

First, the mounting band 15 is tied and fixed in advance at an appropriate position above the water of the steel pipe 1 (just above the part where surface treatment and inspection are to be performed), and the holder 2 is equipped with a surface treatment tool 9 according to the purpose of the work. Alternatively, the inspection probe 10 or both may be set at the same time. Next, the hook-like connecting means 7 of the jig main body 3 is fitted into the collar portion 15a of the mounting band 15, and the jig main body 3 is suspended from the steel pipe 1. At this time, the V-shaped legs 8 of the upper girder 6 come into contact with the steel pipe 1 so as to straddle it.

Therefore, the jig main body 3 is held in a suspended state parallel to the steel pipe 1.

The installation work of the jig main body 3 is carried out by an operator while on the water, such as on a work boat.

Next, the vertical movement means is remotely operated from above the water to move the holder 2 up and down while operating the surface treatment tool 9, the inspection probe 10, or both to perform the required work.

That is, the holder 2 is moved up and down by driving the motor 13 to rotate the feed screw 11 forward and backward.

For surface treatment, it is possible to use a grinder or a rotary wire brush, depending on the amount of deposits to be removed and the fact that they are suitable for remote control. Suitable methods include an air jet method, a water jet method, and a so-called sand blast method in which sand is mixed with these methods.

Appropriate methods for inspection are visual inspection using a video camera, wall thickness measurement using ultrasonic waves, flaw detection, etc. as methods that are easy to observe on the water.

Measurement data and other inspection information are transmitted over the water using electrical signals, etc.

In addition, in the inspection device having such a configuration, the inner circumferential surface of the screw hole 12a of the sliding nut 12 of the screw-type vertical movement device may be simply cut with a female thread as described above; In order to prevent existing sand and other fine particles from being bitten, it is preferable to have one or several vertical grooves 18 formed therein. Since the holder 2 slides while removing the fine particles present, this is effective in preventing galling of the threaded portion.

Holder 2 position, ie surface treatment tool 9. The position of the inspection probe 10 is detected by using the feed screw 1 as described above.
This is done by specifying the position of the holder 2 at the start of rotation of the feed screw 11, and measuring the number of rotations of the feed screw 11 with a non-contact tachometer 17.

Further, the inner circumferential surface of the guide hole 2A of the holder 2 that slides in contact with the guide frame 4 may be a rough finished surface.
If the shape has a plurality of vertical grooves 19, such as a figure 7 shape, in the sliding direction, there will be less contact resistance during vertical movement, and the holder 2
It holds the water firmly without any play, and also has the effect of preventing fine particles present in the water from getting caught.

Next, another embodiment of the present invention will be described based on FIGS. 3 and 4.

That is, in this embodiment, the holder 22 is moved up and down using a pair of wires, ropes, or chains for raising and lowering as the vertical movement device.

That is, one pulley 20 is mounted on the upper surface of the upper girder 6, and two pulleys 26 and 27 are arranged in parallel on the platform 25.
Each is fixedly attached. And the rising wire 28
is hung on a pulley 27 on the front side of the platform 25, passes through the through hole 25a of the platform 25, and is connected and fixed to the upper surface of the holder 22. On the other hand, the lowering wire 2
9 is hung on the pulley 26 on the rear side of the platform 25, passes through the through hole 25b of the platform 25, and further passes through the through hole 22a of the holder 22 to connect to the pulley 26 of the upper girder 6.
0 and then connected and fixed to the bottom surface of the holder 22.

Therefore, by pulling one of the pair of wires 28 and 29 for raising and lowering, and letting out the other, the holder 2
2 is moved up and down.

Note that the wires 28 and 29 are pulled and let out from the water via the platform 25.

Ropes or chains may be used instead of wires 28,29.

In this embodiment, the holder 22 position, ie the surface treatment tool 9. The position of the inspection probe IO can be detected by attaching a scale as a holder position detection means to the portion of the wire 28, 29 above the water.

Further, in this embodiment, two mutually parallel guide frames 24 whose upper and lower ends are connected by a platform 25 and an upper beam 6, respectively, are provided as guide parts.

In this case, the holder 22 is sandwiched between or circumscribed by both guide frames 24 and slides.

In the figure, an example is shown in which the holder 22 slides while being sandwiched between both guide frames 24, and a rectangular groove 22b extending in the vertical direction is formed on opposing sides of the holder 22, and in this rectangular groove 22b, both guide frames 24 are slid. 24 are fitted into each other. In addition, a plurality of vertical grooves 30 such as a 7-shape are formed in the sliding direction on the inner surface of this rectangular groove 22b to reduce contact resistance during vertical movement and to prevent fine particles present in the water from getting caught. do.

In each of the embodiments described above, the attachment band 15 is composed of two halves of rings 15A and 15B, but it may also be composed of a chain.

This configuration is shown in FIGS. 5 and 6.

That is, the chain 31 is provided with a plurality of upwardly projecting attachments 32 on the outer side when attached to the steel pipe 1, and a hook-shaped connecting means at the inner end of the platform is fitted into the attachments 32. It's becoming addictive.

Then, the bonding bolt 33 is inserted into the insertion hole of the bonding bracket 34 provided at one end of the chain 31, and a large number of chain structures 31 forming the chain 31 are inserted.
The chain 31 is attached to the outer periphery of the steel pipe 1 by inserting the chain 31 into an appropriate gap 31b between the holes 31a and 31b, and screwing and tightening a nut 36 to the tip of the port 33 via a washer 35.

The outer diameter shape of the bondage bolt 33 is the same as that of the chain structure 3.
It may be formed into an appropriate shape such as circular or square in accordance with the appropriate gap 31b between 1a.

This attachment band using the chain 31 is convenient because it can accommodate a steel pipe 1 of any outside diameter and can be tied to the steel pipe 1 by simply tightening the bolt 33 and nut 36 at one point. .

Furthermore, in each of the above embodiments, the distance between the steel pipe l and the jig main body 30 was fixed and limited, but the parallelism between the steel pipe l and the jig main body 3 was strictly set, and the mounting band 15 and In order to eliminate play in the connecting portion, it is desirable to be able to adjust the length of the connecting means and the legs to adjust the distance.

This configuration is shown in FIGS. 7 and 8.

FIG. 7 shows a structure for adjusting the length of the connecting means, and the connecting means 37 is supported in a slide hole 38a of a sleeve 38 fixedly attached to the upper surface of the platform 5 so as to be freely slidable in the front-rear direction. The sleeve 38 also has a lock bolt 39 that is screwed into the slide hole 38a.
is attached so that the connecting means 37 can be locked at any sliding position.

FIG. 8 shows a leg length adjustment structure, in which four threaded rods connected to the base of the leg 40 are screwed into a bracket 42 fixedly attached to the lower surface of the upper girder 6, and the screwing position is adjusted. By making changes, people are supported to freely advance or retreat.

Further, lock nuts 43 are screwed onto both ends of the bracket 42 of the threaded rod 41, so that the leg 40 can be locked at any screwed position.

Furthermore, in the above embodiment, legs are provided on the upper girder so that the jig main body 3 suspended from the steel pipe 1 is held parallel to the steel pipe by the connecting means. It is also possible to provide legs so that the jig main body 3 is held by the two legs. In this case, the one-legged type is advantageous in that the weight of the entire device can be reduced.

Further, the two-legged type is advantageous when the guide portion of the guide frame is lengthened and the jig main body 3 is more stably attached to the steel pipe against waves and the like.

In the case of a single leg type, the length of the leg's protrusion is appropriately adjusted in advance before hanging the jig body 3, and then the length of the protrusion of the connecting means is adjusted according to the deformation or unevenness of the surface of the steel pipe 1. The parallelism between the jig body 3 and the vertical tube 1 can be set more accurately and firmly by making fine adjustments. If the jig main body 3 is suspended from the top and then the protruding length of the upper leg is finely adjusted according to the deformation and unevenness of the surface of the steel pipe 10, the jig main body 3 and the steel pipe 1
Parallelism can be set more accurately and firmly.

According to an inspection jig with such a configuration, when performing surface treatment or inspection near the water surface of the rising part of underwater steel pipe piles or underwater piping, that is, near the splash zone, in normal port facilities, river facilities, etc. The mounting band can be tied to the steel pipe 1, the jig body 3 can be suspended and fixed, and the surface of the steel pipe 1 can be treated and inspected by remote control, exclusively on water such as on a work boat, which has the following advantages.

(1) Water temperature, water flow, etc. when performing underwater work,
There is no reduction in efficiency due to the effects of waves, transparency, etc., and there is no deterioration in inspection or work accuracy.

(2) Since there is no need for cooperation between the dialer and the engineers on the water, there are no problems caused by insufficient communication between the underwater and the surface.

(3) It can be carried out by workers with ordinary skills without relying on diving invectors who have both diving and inspection skills.

(4) There is no adverse effect on the health of workers due to water contamination.

(5) Inspections can be carried out economically without using large-scale equipment such as remotely controlled unmanned aerial vehicles, submersibles, and atmospheric submersible elevators.

The structure of the support part that supports the guide part in a suspended state that guides the holder along the steel pipe 1 in a vertically movable manner can be arbitrary, but in this example, a hook-shaped structure provided on the jig main body 3'' is used. The connecting means is fitted between the flange 15a of the mounting band fixed to the outer periphery of the steel pipe 1 and the attachment 32 and the surface of the steel pipe 1 and suspended, and the legs are brought into contact with the outer periphery of the steel pipe 1. There is an advantage that the jig main body 3 can be easily and precisely maintained in a suspended state at any position by its own weight, and the workability for attaching the jig main body 3 can be improved.

<Effects of the Invention> As explained above, according to the present invention, inspection and surface treatment of underwater rod-like members extending from above water to below the water surface, such as underwater steel pipe piles for supporting floating structures or rising parts of underwater piping, can be carried out. When carrying out the inspection, the operator can perform the inspection by remote control while on the water, such as on a ship, by setting the inspection means, surface, and surface treatment means on an underwater rod-shaped member, without having to enter the water. In addition to improving efficiency, inspection and work accuracy,
The test can be carried out easily and without any trouble by workers with ordinary skills, and it has the great effect of being able to carry out the test economically without any negative impact on the health of the worker. This is practically advantageous.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of an underwater rod-shaped member inspection jig according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 1, FIG. 5 is a plan view showing the mounting state of another embodiment of the attachment band, and FIG. 6 is another embodiment of the attachment band. FIG. 7 is a diagram showing the structure of the connecting member, (a) is a front view, (c) is a plan view, and FIG. FIG. 8 is a diagram showing another embodiment of the leg, in which (a) is a front view and (b) is a bottom view. l...Steel pipe 2.22...Holder 3...
Jig body 4.24...Guide frame 5.25.
...Platform 6...Upper girder 7.37...
Connection means 8, 40... Legs 9... Surface treatment tool 10... Inspection probe 11... Feed screw 12... Slide nut 13... Motor
- 15... Mounting band 20, -26.27... Pulley 28.29... Wire 31... Chain
33... Bondage bolt 36... Nut 38...
・Sleeve 38a...Slide hole 39...
・Lock bolt 41...Threaded rod 42...Bracket 43...Lock nut patent applicant
Nippon Oil Co., Ltd. Kitanihon X-Ray Inspection Industry Co., Ltd. Representative Patent Attorney Fujio Sasashima Figure 5 Figure 6 Figure 7 (0) Figure 8 (Q) Figure 8 (b)

Claims (2)

[Claims] (1) A holder that holds at least one of a surface treatment means and an inspection means for an underwater rod-like member extending from above the water to below the water surface, a guide portion that guides the holder to freely move up and down along the underwater rod-like member, and the underwater rod-like member. The jig body includes a jig main body having support parts attached to a part below the water surface and a part above the water surface of the member to support the guide part in a suspended state, a vertical movement device to move the holder up and down, and a holder position detection means. A jig for inspecting underwater rod-shaped members, characterized by comprising: (2) A jig for inspecting an underwater rod-like member according to claim 1, wherein a mounting band is attached to the outer periphery of the underwater rod-like member to connect a support section mounted on the above-water portion of the underwater rod-like member.