JPH0762672B2 - Underwater rod-shaped member inspection jig - Google Patents

Description

The present invention relates to a jig for inspecting an underwater rod-shaped member such as an underwater steel pipe pile or an underwater pipe for supporting a floating structure.

<Prior art> In a port facility or river facility, near the water surface of a pipe member or a member having a similar shape extending from above the water surface to above the water surface, such as an underwater steel pipe pile for supporting a floating structure or a rising part of an underwater pipe. That is, since the splash zone is severely damaged and corroded by waves, it is necessary to regularly perform surface treatments such as rust removal and removal of adhering organisms, and inspections such as flaw detection inspections and wall thickness inspections.

By the way, these surface treatments and inspections are underwater operations and require specialized techniques, and conventionally, they are carried out in collaboration with a diving inspector or diver and an engineer on the water (PETOROTECH No. 10). Volume 5, p. 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 follows.

(1) Coordinated play on and under water tends to lack closeness.

(2) The number of so-called diving inspectors that combine diving technology and inspection technology is very small.

(3) Efficiency and accuracy of underwater work depend on the natural environment such as water temperature, water flow, waves, and transparency.

(4) The health of underwater workers is adversely affected depending on the state of water pollution.

(5) When targeting deep water such as offshore drilling rigs, remote-controlled drones, submersible atmospheric diving elevators, etc. are also used, but the equipment becomes large-scale and general port facilities and rivers Not necessarily suitable for facilities.

Therefore, in view of the conventional circumstances as described above, the present invention is used when inspecting or surface-treating an underwater rod-shaped member extending from above water to below the water surface such as a submerged steel pipe pile for supporting a floating structure or a rising part of an underwater pipe. Another object of the present invention is to provide an inspection jig that allows an operator to set the inspection means and the surface treatment means on an underwater rod-shaped member and to operate remotely while being on the water of a ship or the like without the operator entering the water.

<Means for Solving Problems> Therefore, according to the present invention, a holder that holds at least one of a surface treatment means and an inspection means for an underwater rod-shaped member extending from above water to below the water surface, and the holder to the underwater rod-shaped member. A guide part for freely moving up and down along the guide part, a platform fixed to the upper part of the guide part, and a lower girder fixed to the lower part of the guide part are provided. A hook-shaped connecting means that fits into an engaging portion that is formed to project upward is provided on the outer edge of the mounting band that is mounted on the outer periphery of the portion, and the lower girder has the outer periphery of the underwater portion of the underwater rod-shaped member. A jig main body provided with legs that come into contact with each other across the surface; a vertical movement device that vertically moves the holder; and holder position detection means that detects the holder position. Nde and inspection jig constructed water rod member.

<Operation> When the surface treatment or inspection of the underwater rod-shaped member is performed, the surface treatment means or the inspection means or both are set in the holder according to the work purpose. Next, the legs of the lower girder of the jig body are brought into contact with the underwater rod-shaped member so as to straddle the outer peripheral surface of the underwater portion, and the hook-shaped connecting means of the platform is attached to the outer periphery of the above-water portion of the underwater rod-shaped member. It is fitted into the engaging portion of the wearing band attached to the underwater rod-shaped member, and the guide portion is supported by the underwater rod-shaped member in a suspended state. Then, the surface treatment means and / or the inspection means are operated while the holder is moved up and down by the up-and-down moving device to perform the required work.

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

<Example> Hereinafter, an example of the present invention is described based on a drawing.

1 and 2 showing an embodiment of the present invention, a jig for inspecting an underwater rod-shaped member is at least one of a surface treatment means and an inspection means of a steel pipe 1 as an underwater rod-shaped member extending from above water to below the water surface. 2, a cylindrical guide frame 4 and a guide frame 4 serving as a guide portion for guiding the holder 2 to freely move up and down along the steel pipe 1.
Jig body 3 provided with a platform 5 fixed to the upper part of the table and a lower girder 6 fixed to the lower part of the guide frame 4.
A vertical movement device for moving the holder 2 up and down, and holder position detection means for detecting the position of the holder 2.
It is configured to include.

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

That is, the platform 5 and the lower girder 6 each function as a mounting base for the vertical movement device and the like, and the platform 5 has an outer edge portion of a mounting band 15 mounted on the outer circumference of the water portion of the steel pipe 1. A hook-shaped connecting means 7 that fits into the flange portion 15a as an engaging portion formed to project upward is provided, and the lower girder 6 abuts on the outer peripheral surface of the lower portion of the water surface of the steel pipe 1 so as to straddle it. A C-shaped leg 8 is provided.

In this case, the hook-shaped connecting means 7 is formed so as to project forward at the inner end of the platform 5, and the leg 8 is
An inner end of the lower girder 6 is formed so as to project forward in parallel with the hook-shaped connecting means 7.

The holder 2 is formed with a guide hole 2A penetratingly inserted into the guide frame 4 so as to slide freely. At the inner end of the holder 2, a surface treatment tool 9 as the surface treatment means and an inspection probe 10 as the inspection means.
At least one of them is installed.

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

Measurement data and other inspection information are transmitted on the water by electric signals or the like.

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

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

That is, the feed screw 11 is disposed so as to penetrate through the holder 2 in parallel with the guide direction, that is, in parallel with the guide frame 4, and both ends thereof are rotatable by the bearings 16 incorporated in the platform 5 and the lower girder 6, respectively. Supported by. Lead screw 11
The outer peripheral male thread portion 11a is screwed into the female thread portion of the inner peripheral surface of the screw hole 12a of the slide nut 12 incorporated in the guide frame 4.

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

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

The mounting band 15 is composed of two split rings 15A and 15B having a radius of curvature matched to the outer diameter of the steel pipe 1.

The rings 15A and 15B are formed with a flange portion 15a protruding upward at a portion which becomes an outer edge portion when mounted on the steel pipe 1. The flange portion 15a has a hook at an inner end portion of the platform 5. The connecting means 7 in the shape of a ring is fitted.

The C-shaped leg 8 at the inner end of the lower girder 6 abuts the steel pipe 1 so as to straddle the steel pipe 1 to hold the jig body 3 in parallel with the steel pipe 1.

Further, in the figure, reference numeral 17 is a non-contact type tachometer as a holder position detecting means for detecting the position of the holder 2, and detects the position of the surface treatment tool 9 or the inspection probe 10. .

In this case, the holder 2 at the start of rotation of the feed screw 11
The position of the holder 2 is detected by characterizing the position and measuring the number of rotations of the feed screw 11 using the non-contact tachometer 17.

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

First, the wearing band 15 is previously tightly bound and fixed to an appropriate position above the water of the steel pipe 1 (immediately above the portion where surface treatment and inspection are to be performed), and the surface treatment tool 9 is attached to the holder 2 according to the work purpose. Alternatively, the inspection probe 10 or both are set at the same time. Next, the hook-shaped connecting means 7 of the jig body 3 is fitted into the collar portion 15a of the mounting band 15, and the jig body 3 is attached to the steel pipe 1.
Hang on. At this time, the C-shaped leg 8 of the lower girder 6 is
The steel pipe 1 is abutted so as to straddle it.

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

The mounting operation of the jig body 3 is performed by an operator who is on the water of a work boat or the like.

Then, the vertical movement means is remotely operated from above the water to move the holder 2 up and down, and the surface treatment tool 9 or the inspection probe 10 or both are operated 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 the surface treatment, a grinder or a rotary wire brush can be used because it is suitable for the condition of deposits to be removed and remote operation, but only the jet nozzle is set in the holder 2 and the hose is applied from the water. An air jet method of pressing, a water jet method, or a so-called sand blast method in which sand is mixed into these is suitable.

For the inspection, as a method that can be easily observed on water, visual inspection using a video camera, wall thickness measurement by ultrasonic waves, flaw inspection, and the like are suitable.

The measurement data and other inspection information are transmitted on the water by electric signals or the like.

Incidentally, in the inspection device having such a configuration, on the inner peripheral surface of the screw hole 12a of the sliding nut 12 of the screw type vertical movement device,
Although it is possible to just cut the female thread as described above,
In order to prevent the inclusion of sand and other fine particles existing in the water, it is preferable that one to several vertical grooves 18 are processed. That is, when the vertical groove 18 is provided, the holder 2 slides while removing the fine particles adhering to the male screw portion 11a of the feed screw 11, which is effective in preventing galling of the screw portion.

To detect the position of the holder 2, that is, the position of the surface treatment tool 9 and the position of the inspection probe 10, as described above, the position of the holder 2 at the start of rotation of the feed screw 11 is specified, and the non-contact type tachometer 17 is used. It is performed by measuring the number of rotations of the feed screw 11.

Further, the inner peripheral surface of the guide hole 2A that slides in contact with the guide frame 4 of the holder 2 may be a flat finish surface in general, but if a plurality of V-shaped vertical grooves 19 are formed in the sliding direction, The contact resistance at the time of vertical movement is small, the holder 2 is firmly held without any play, and the particles existing in water are prevented from being caught.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4.

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

That is, one pulley 20 is fixedly mounted on the upper surface of the lower girder 6, and two pulleys 26, 27 juxtaposed in front and rear are fixedly mounted on the platform 25, respectively. Then, the raising wire 28 is hooked on the pulley 27 on the front side of the platform 25, penetrates the through hole 25a of the platform 25, and is fixedly connected to the upper surface of the holder 22. On the other hand, the descending wire 29 is hung on the pulley 26 on the rear side of the platform 25 and the through hole of the platform 25.
After passing through the through hole 22a of the holder 22 and hanging on the pulley 20 of the lower girder 6, it is connected and fixed to the lower surface of the holder 22.

Therefore, the holder 22 is moved up and down by pulling one of the pair of raising and lowering wires 28, 29 and feeding the other.

The wires 28 and 29 are pulled and unwound from the water via the platform 25.

A rope or a chain may be used instead of the wires 28 and 29.

In the case of this embodiment, the position of the holder 22, that is, the position of the surface treatment tool 9 and the position of the inspection probe 10 is detected by the wires 28, 29.
It can be detected by attaching a scale as a holder position detecting means to the portion above the water.

Further, in this embodiment, two guide frames 24, which are parallel to each other and whose upper and lower ends are connected by the platform 25 and the lower girder 6, are provided as the guide portions.

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

In the figure, an example is shown in which the holder 22 is sandwiched between both guide frames 24 and slides, and rectangular grooves 22b extending in the vertical direction are formed on opposite side surfaces of the holder 22, and the rectangular grooves 22b are formed.
Both guide frames 24 are fitted to each other. A plurality of V-shaped vertical grooves 30 are also provided in the inner surface of the rectangular groove 22b in the sliding direction so as to reduce the contact resistance during vertical movement and prevent the trapping of fine particles existing in water. To do.

In each of the above embodiments, the mounting band 15 is composed of the split rings 15A and 15B, but it may be composed of a chain.

This structure is shown in FIGS. 5 and 6.

That is, the chain 31 is provided with a plurality of attachments 32 as engaging portions projecting upward in a portion which becomes an outer side when mounted on the steel pipe 1, and the attachment 32 has a hook shape at the inner end of the platform. The connecting means of is fitted.

Then, the binding bolt 33 is inserted into the insertion hole of the binding bracket 34 provided at one end of the chain 31, and is also inserted into an appropriate gap 31b between the many chain components 31a forming the chain 31, Bolt 33 Washer 35 at the tip
The chain 31 is tightly attached to the outer circumference of the steel pipe 1 and attached by screwing and tightening the nut 36 through the.

The outside diameter of the binding bolt 33 is the chain structure 31a.
An appropriate shape such as a circular shape or a rectangular shape may be adopted in accordance with an appropriate gap 31b therebetween.

This chain 31 mounting band is convenient because it can be applied to the steel pipe 1 having an arbitrary outer diameter, and the binding to the steel pipe 1 can be performed only by fastening one place with the bolt 33 and the nut 36. .

Further, in each of the above-mentioned embodiments, the interval between the steel pipe 1 and the jig body 3 is invariable and limited. However, the parallelism between the steel pipe 1 and the jig body 3 is strictly set, and the mounting band 15 is used. In order to eliminate the play in the connecting portion with and, it is preferable that the connecting means and the leg are configured to be adjustable in length so that the distance can be adjusted.

This configuration is shown in FIGS. 7 and 8.

FIG. 7 shows the length adjusting structure of the connecting means. The connecting means 37 is slidably supported in the front-rear direction in a slide hole 38a of a sleeve 38 fixedly attached to the upper surface of the platform 5. A lock bolt 39, which is screwed into the inside of the slide hole 38a and is projected, is attached to the sleeve 38, so that the connecting means 37 can be locked at an arbitrary slide position.

FIG. 8 shows a leg length adjusting structure. A screw rod 41 connected to the base of the leg 40 is screwed to a bracket 42 fixedly attached to the lower surface of the lower girder 6 to change the screwing position. That is why he is freely supported.

Also, lock nuts 43 are provided on both ends of the bracket 42 of the screw rod 41.
Are screwed together so that the leg 40 can be locked at any screwing position.

Further, in the above embodiment, the lower girder is provided with the legs so that the jig main body 3 suspended from the steel pipe 1 by the connecting means is held in parallel with the steel pipe. It is also possible to provide a leg and hold the jig body 3 with two legs. In this case, the one-leg type is advantageous in that the weight of the entire device can be reduced.

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

In the case of the one-leg type, the protrusion length of the leg is appropriately adjusted in advance, and then the jig body 3 is hung, and then the protrusion length of the connecting means is adjusted according to the deformation or unevenness of the surface of the steel pipe 1. If the fine adjustment is performed, the parallelism between the jig body 3 and the steel pipe 1 can be set more accurately and firmly.

In the case of the two-leg type, the protrusion length of the lower leg is appropriately adjusted in advance, and then the jig body 3 is hung, and then the protrusion length of the upper leg is similarly changed by the deformation or unevenness of the surface of the steel pipe 1. If the fine adjustment is performed according to, the parallelism between the jig body 3 and the steel pipe 1 can be set more accurately and firmly.

According to the inspection jig having such a configuration, in a normal port facility or river facility, in the case of surface treatment or inspection near the water surface of the rising part of the underwater steel pipe pile or the underwater pipe, that is, near the splash zone, the worker Since the mounting band is bound to the steel pipe 1 and the jig body 3 is suspended and fixed on the water exclusively on a work boat or the like, and the surface of the steel pipe 1 can be processed and inspected by remote control, the following advantages can be obtained.

(1) Water temperature, water flow, etc.
There is no deterioration in efficiency and deterioration in inspection and work accuracy due to the influence of waves and transparency.

(2) Since there is no need for cooperation between the diver and the engineer on the water, there are no problems due to insufficient communication between the water and the water.

(3) It can be performed by an operator having ordinary skill without relying on a diving inspector having both diving technology and inspection technology.

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

(5) Remote control Unmanned aerial vehicles, submersibles, atmospheric submersible elevators, etc. can be economically implemented without using large-scale equipment.

It should be noted that the structure of the support portion that supports the guide portion that guides the holder freely up and down along the steel pipe 1 in a suspended state is arbitrary, but the hook-shaped connecting means provided in the jig body 3 is used as the steel pipe 1.
The collar 15a of the wearing band fixed to the outer periphery and the attachment 3
Since it is configured to be fitted between 2 and the surface of the steel pipe 1 to hang it and the legs to contact the outer peripheral surface of the steel pipe 1, the jig body 3 can be easily and stably placed on the outer periphery of the steel pipe 1 at any position by its own weight. Since the jig body 3 can be held in a suspended state and the jig body 3 can be easily attached to the steel pipe 1, the jig body 3 can be easily attached to the steel pipe 1, and the jig body 3 can be easily attached to the steel pipe 1. It can also be removed.

<Effects of the Invention> As described above, according to the present invention, inspection and surface treatment of an underwater rod-shaped member extending from above water to below water such as a submerged steel pipe pile for supporting a floating structure or a rising part of an underwater pipe. When performing the inspection, the operator can set the inspection means and surface treatment means on the underwater rod-shaped member on the water of a ship etc. and perform the inspection by remote control without going into the water, improving the work efficiency. In addition to improving inspection and work accuracy, the hook-shaped connecting means of the platform on the jig body side is fitted into the engaging part of the mounting band mounted on the outer periphery of the water portion of the underwater rod-shaped member, and the leg of the lower girder is submerged. Since the jig body is held so as to contact the underwater rod-shaped member so as to straddle the outer peripheral surface of the underwater portion, the jig body is held at an arbitrary position on the outer circumferential surface of the underwater rod-shaped member. Easy to use due to its own weight In addition, the jig body can be stably held in a suspended state, and the jig body can be easily attached to the underwater rod-shaped member. Therefore, the jig body can be easily attached to the underwater rod-shaped member. It is also possible to easily remove from. In addition, a worker having ordinary skill can easily perform the inspection without causing any trouble, has no adverse effect on the health of the worker, and has a great effect that the inspection can be economically performed. This is an advantage.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a jig for inspecting an underwater rod-shaped member according to the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is another embodiment. FIG. 4 is a front view showing FIG. 4, a sectional view taken along the line BB in FIG. 1, FIG. 5 is a plan view showing a mounting state of another embodiment of the wearing band, and FIG. 6 is another embodiment of the wearing band. (A) is a front view, (b) is a plan view, and FIG. 7 is a view showing another embodiment of the connecting member.
Is a plan view, (b) is a front view, FIG. 8 is a view showing another embodiment of the leg, (a) is a front view, and (b) is a bottom view. 1 …… Steel pipe, 2,22 …… Holder, 3 …… Jig body, 4,24
…… Guide frame, 5,25 …… Platform, 6 ……
Lower girder, 7,37 …… Connecting means, 8,40 …… Leg, 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 …… Banding bolt, 36 …… Nut , 38 …… Sleeve, 38a …… Slide hole, 39 …… Lock bolt, 41
...... Screw rod, 42 …… Bracket, 43 …… Lock nut

Claims (1)

[Claims] 1. A holder for holding at least one of a surface treatment means and an inspection means for an underwater rod-shaped member extending from above water to below the water surface, and a guide portion for guiding the holder vertically up and down along the underwater rod-shaped member. The platform includes a platform fixed to an upper portion of the guide portion and a lower girder fixed to a lower portion of the guide portion, and the platform includes an outer edge portion of a mounting band attached to an outer circumference of a water portion of the underwater rod-shaped member. Hook-shaped connecting means that fits into the engaging portion that projects upward is provided, and the lower girder is provided with legs that abut on the outer peripheral surface of the underwater portion of the underwater rod-shaped member so as to straddle the outer peripheral surface. And a jig body, a vertical movement device for moving the holder up and down, and a holder position detection means for detecting the holder position. A jig for inspecting members.