JPH057073B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) This invention relates to a cleaning method and cleaning method for removing sea creatures adhering to the inner peripheral surface of a seawater conveyance passage such as a turbine condenser circulating water piping in a nuclear power plant or the like. The purpose of this cleaning method is to provide a cleaning method for safely and efficiently cleaning the inner circumferential surface of a seawater passageway, particularly in a continuous direction or a T-shaped direction, without requiring manual work within the seawater passageway. We provide cleaning machines.

(Background of the invention) As shown in Fig. 6, seawater b is used as cooling water in the turbine condenser a of a nuclear power plant, and this seawater b is sucked up by a pump c, and the condenser circulating water is The seawater is circulated within the condenser a via a seawater feed passage d, which serves as a pipe, and is then discharged.

Since the inner circumferential surface of such seawater conveyance passage d is constantly exposed to seawater, sea creatures such as barnacles, mussels, and slime adhere and grow, which also becomes a cause of obstructing the passage of seawater.

Therefore, it is necessary to periodically clean the inner peripheral surface of the seawater passageway d, but the inside of the seawater passageway d is a dark place, and toxic gases such as hydrogen sulfide are generated due to the decomposition of marine life. In addition to being slippery due to slime deposits, the seawater conveyance path d itself is complicatedly curved and has sloped portions f, corner portions g, vertical portions h, etc. in addition to the horizontal portion e. Cleaning work is extremely difficult.

Conventionally, in order to clean such a seawater passageway d, as shown in FIG. This was done by scraping off the attached sea creatures.

However, as mentioned above, the inside of the seawater conveyance passage d is dark, toxic gas is generated, and the conditions are slippery, making the working environment extremely poor, requiring constant lighting, ventilation, and physical support. was inefficient.

In addition, although cleaning the horizontal part e can be done in a relatively stable posture, it is especially important to clean the slope part f, corner part g, and vertical part h as shown in Figure 7 A, B, and C. It is necessary to work while supporting the body with a safety belt or a safety belt, and the work movement is extremely restricted.

In particular, as shown in FIGS. 7B and 7C, work at corner sections g and vertical sections h required work at heights, which was highly dangerous.

Furthermore, as shown in FIG. 7B, the contact angle r of the cleaning rod j that hits the corner portion g becomes large, making it easy to damage the corner portion g.

(Prior art and its problems) As a prior art, there is one disclosed in Japanese Utility Model Application No. 57-89156. This disclosed technology includes a variable-angle caterpillar that supports the aircraft body, and a main body that has the function of moving up and down while being guided and held by pillars installed on the aircraft body.
The main body was equipped with a cutter capable of advancing and retracting, swinging and rotating functions on one side of a rotatably driven pool at the front end, and a rotating brush on the other side.

However, since the seawater conveyance path is run by a variable-angle caterpillar, it is difficult to align the center axis of the seawater conveyance path with the center of the pool, making it difficult to rotate the pool. It was not possible to clean the interior walls.

There is also one disclosed in Japanese Patent Application Laid-open No. 169674/1983. This disclosed technology includes an at least bibar-shaped stepper consisting of a stepper body and a step counter body, which are hingedly connected to each other via at least one cardan joint, each of which is clamped to the inner circumferential surface of a pipe. At least one of the stepping body and the stepping counterbody is provided with a tightening device for fixing, and when the tightening device of the stepping body is tightened and the tightening device of the stepping counterbody is released or vice versa. On the other hand,
It is provided with a drive device for moving itself in the direction of the tube axis relative to the other, and a guide element is provided on the outer periphery of the stepping body and the stepping opposing body to move by sliding or rolling on the inner peripheral surface of the tube. It was equipped.

However, it was not possible to align the center of the stepped body with the central axis of the tube.

(Means for Solving the Problem) The present invention provides a cleaning machine comprising a traveling machine in which a front and rear running section are connected in a flexible manner in a bending seawater conveying passage, and a cleaning device detachably attached to the front running section. The cleaner is carried in and positioned on the central axis of the seawater passageway using the front and rear travel guide arms, and the cleaning machine is made to travel along the seawater passageway between predetermined areas, and at the same time, the front end of the traveling machine moves along the seawater conveyance passageway. A rotating body is rotated about the central axis of the rotating body, and at the same time, a cleaning brush protruding from the circumferential side of the rotating body is brought into contact with the inner circumferential surface of the seawater conveying passage, thereby removing weakly adherent sea creatures from the inner circumferential surface. At the same time, a crushing hammer attached to the circumferential side of the rotary body is rotated along an inscribed circle locus in contact with the inner circumferential surface of the seawater conveying passage to remove hard sea creatures attached to the inner circumferential surface. An inner circumferential surface of the seawater conveyance passage characterized in that the seawater is crushed, and at the same time, the exfoliated and crushed marine life is inhaled by a suction pipe protruding from the rotating body, and at the same time, the inhaled matter is discharged from the suction pipe to the outside of the seawater conveyance passage. A self-propelled traveling machine is constructed by connecting the front and rear running parts in a flexible manner, and the front and rear running parts of this running machine are brought into contact with the inner peripheral surface of the seawater conveyance passage, and the said running machine is connected to the seawater conveyance passageway. Front and rear traveling guide arms are positioned on the central axis of the machine and project radially in all directions, and a cleaning device is removably attached to the tip of the traveling machine positioned by these front and rear traveling guide arms. A cleaning brush that contacts the inner circumferential surface of the seawater feeding passage is mounted on the circumferential side of the cleaning device, and the cleaning brush is rotated along an inscribed inner locus that contacts the inner circumferential surface of the seawater feeding passage on the circumferential side of the cleaning device. A cleaning device consisting of a crushing hammer or other device is provided with a vertically extendable part, and an elevating base extending in a 90° direction is attached to the elevating base, and a foldable elevating guide arm and a rotating rod are attached to the elevating base. The cleaning device includes a cleaning brush and a crushing hammer attached to the tip of the rotary rod, and this one device or the other device is used as a cleaning device, and the rotating body is equipped with a cleaning brush and a crushing hammer. To solve the above problems by providing a cleaner for cleaning the inner circumferential surface of a seawater conveying passage, in which a suction pipe directed toward the inner circumferential surface is installed, and the suction pipe is communicated with a discharge pipe introduced from outside the seawater conveying passage.

(Example) An example of the present invention will be described based on the drawings.

1 to 5 are diagrams for explaining a cleaning method and cleaning machine according to an embodiment of the present invention.
indicates a cleaning machine.

This cleaning machine 1, as shown in FIG. 1A and C,
It is composed mainly of a traveling machine 2.

The traveling machine 2 is constructed by connecting horizontally cylindrical front and rear running sections 3 and 4 to both ends of a hydraulic propulsion cylinder 5 that expands and contracts in the front and back direction via front and rear adjustable joints 6 and 7, respectively. has been done.

From the circumferential side of the front and rear running parts 3 and 4 of the running machine 2, the first
As shown in FIG. C, a plurality of front and rear traveling guide arms 10 and 11 having substantially the same length and in contact with the inner circumferential surface 9 of the seawater conveying passage 8 are respectively provided to protrude radially in all directions.

The front and rear traveling guide arms 10 and 11 are biased in the direction of extension, and have rolling wheels 12 at each tip.

From the circumferential sides of the front and rear running sections 3 and 4 of the traveling machine 2, as shown in FIGS. They project radially in all directions toward 9.

The front and rear tension arms 13 and 14 each have an arcuate plate 15 along the inner circumferential surface 9 of the seawater conveying passage 8 at its tip, and a non-slip rubber plate 16 is adhered to the surface of the plate 15 .

A drive control device 17 for controlling the operations of the front and rear tension arms 13 and 14 and the propulsion cylinder 5 is built into the rear traveling section 4.

The drive control device 17 has the following mechanism.

That is, as shown in FIG. 4A, the contracted state of the propulsion cylinder 5, the extended state of the rear thrust arm 14, and the contracted state of the front thrust arm 13 are taken as the basic posture, and from this basic posture, the propulsion shown in FIG. Extension operation of the cylinder 5, extension operation of the front thrust arm 13 shown in Figure C, contraction operation of the rear thrust arm 14 shown in Figure D,
Reduction operation of the propulsion cylinder 5 shown in figure E, figure F
The process of going through each step of the extension operation of the rear thrust arm 14 shown in FIG. 1 and the contraction operation of the front thrust arm 13 shown in FIG.

The drive control device 17 also has a switching mechanism that repeatedly performs a reverse travel cycle that goes through various stages of operation that are symmetrical to the travel cycle.

A cleaning device 18 is attached to the front end of the traveling machine 2, as shown in FIG. 1A.

The cleaning device 18 is constructed around a horizontally cylindrical rotating body 19 .

The rotating body 19 includes the front and rear traveling guide arms 10,
The central axis 2 of the traveling machine 2 positioned by 11
It is mounted to be rotated by a motor 21 with the rotation center at 0.

A cleaning brush 24 and a crushing hammer 25 are attached to the circumferential side of the rotating body 19 via support arms 22 and 23 that are biased in the extension direction.

The cleaning brush 24 has bristles on the surface of a disc that is rotatably driven by hydraulic pressure, and its angle can be adjusted freely using the tip of the support arm 22 as a fulcrum.

On the other hand, the crushing hammer 25 projects radially from a rotary shaft 26 that is rotatably driven by hydraulic pressure, is attached to the tip of the support arm 23, and is attached to the inner circumferential surface of the seawater conveying passage 8 as shown in FIG. 1C. It is rotationally driven along an inscribed circle locus 27 that is in contact with .

A suction pipe 28 facing the inner circumferential surface 9 of the seawater feed passage 8 is attached to the front end of the rotating body 19 .

The tip of the suction pipe 28 is formed into a funnel shape that covers the upper part of the cleaning brush 24, and the base end communicates with a discharge pipe 29 introduced from outside the seawater feed passage 8.

In the figure, 30 is a hydraulic supply pipe, 31 is a hydraulic discharge pipe, 32 is a swivel joint, 33 is a secondary air supply pipe, and 34 is a monitor camera for observing the states of the cleaning brush 24 and the crushing hammer 25.

Incidentally, this cleaning machine 1 can be disassembled as shown in FIG. 1B.

FIG. 2A is a diagram illustrating a cleaning attachment having a structure different from that of the cleaning device 18. This cleaning attachment 35 is attached to a mounting base 36 attached to the front end of the front running section 3 via a vertically extendable part 37 to a lifting base 38. A foldable lifting guide arm 39 and a rotating rod 40 are attached to the lifting base 38, and a cleaning brush 24 is attached to the tip of the rotating rod 40.
and a crushing hammer 25 are attached.

As shown in FIG.
It is used in place of the cleaning device 18 when cleaning the cleaning device 18.

Next, a cleaning method according to an embodiment of the present invention using the above-mentioned cleaning machine 1 will be explained.

As shown in FIG. 3A, the seawater conveying passage 8 is bent.
The cleaning machine 1 having a running machine 2 in which front and rear running parts 3 and 4 are bendably connected is carried in.

As shown in FIGS. 1A and 1C, the front and rear travel guide arms 10 and 11 that project radially in all directions from the front and rear travel sections 3 and 4 of the cleaning machine 1 are brought into contact with the inner circumferential surface 9 of the seawater conveying passage 8. By doing so, the cleaner 1 is positioned on the central axis 43 of the seawater feed passage 8.

This cleaning machine 1 is connected to the traveling guide arms 10, 1.
1, the vehicle travels one way between predetermined areas within the seawater conveyance passage 8 by repeating the traveling cycle shown in FIGS. 4A to 4G.

That is, as shown in FIG. 4A, the contracted state of the propulsion cylinder 5, the extended state of the rear thrust arm 14, and the contracted state of the front thrust arm 13 are taken as the basic posture, and from this basic posture, the propulsion shown in FIG. Extension operation of the cylinder 5, extension operation of the front thrust arm 13 shown in Figure C, contraction operation of the rear thrust arm 14 shown in Figure D,
Reduction operation of the propulsion cylinder 5 shown in figure E, figure F
The extension operation of the rear thrust arm 14 shown in Figure G and the contraction operation of the front thrust arm 13 shown in Figure G are repeated, and while supporting the aircraft with the thrust force of the front and rear thrust arms 13 and 14, the propulsion cylinder 5 expands and contracts. One-way travel is performed between predetermined areas including the inclined portion 44, horizontal portion 45, corner portion 46, and vertical portion 47 of the seawater conveyance passage 8.

Thereafter, the switching mechanism of the drive control device repeats a reverse travel cycle that goes through each stage of operation that is symmetrical to the travel cycle, and travels backwards between predetermined areas of the seawater conveyance passage 8, and then travels back and forth between predetermined areas of the seawater conveyance passage 8. let

Incidentally, as shown in FIG. 5, at the corner portion 46, the front and rear running portions 3 and 4 are bent by the front and rear universal joints 6 and 7 to follow the bending state of the corner portion 46, and there is no problem in running.

At the same time as this traveling, as shown in FIG.
By bringing the cleaning brush 24 protruding from the circumferential side of the seawater passageway 8 into contact with the inner circumferential surface 9 of the seawater conveying passage 8, weakly adhesive sea creatures 48 such as slime and mussels are peeled off from the inner circumferential surface 9.

At the same time, a crushing hammer 25 attached to the circumferential side of the rotating body 19 is inserted into the inner circumferential surface of the seawater conveying passage 8.
By rotating along an inscribed circle locus that is in contact with , hard sea creatures 49 such as barnacles attached to this inner circumferential surface 9 are crushed.

At the same time, a suction pipe 28 protrudes from the rotating body 19 toward the inner circumferential surface 9 of the seawater feed passage 8.
At the same time, the separated and crushed materials of the sea creatures 48 and 49 are inhaled, and at the same time, the inhaled matter is discharged through a discharge pipe 29 extending from the suction pipe 28 to the outside of the seawater conveying passage 8.

Discharging through the discharge pipe 29 is performed by a suction wheel 52 which is sequentially connected to a hose reel truck 50 and a receiver tank truck 51, which are stopped on the ground, as shown in FIG. 3A.

The hose reel vehicle 50 accommodates the hydraulic pipe 55 shown in FIG. 3A, which is composed of the hydraulic supply pipe 30 and the hydraulic discharge pipe 31 shown in FIG. In addition, a remote control room 57 is installed to control the traveling speed, traveling direction, rotational speed of the cleaning brush 24 and the crushing hammer 25, etc. while checking the image from the monitor camera 34 shown in FIG. 1A. It is set up.

Furthermore, as shown in FIG. 3A, if the area to be cleaned is not filled with seawater 58, water is supplied by a water tanker 59; on the other hand, as shown in FIG. An air supply vehicle 60 that accommodates the secondary air supply pipe 33 shown in Figure A so as to be freely drawn out.
The base end of the pipe 33 is opened to the atmosphere.

Note that each of the pipes 29, 33, and 55 is long and heavy, and traveling along the bent seawater passageway 8 with these pipes is difficult due to their own weight, frictional resistance, getting caught at the corner portion 46, etc. Since this would be a heavy burden, a corner guide 61 is installed at the corner portion 46.

A required number of corner guides 61 are attached to the rear end of the traveling machine 2, and are installed at required locations during traveling.

The cleaning method according to an embodiment of the present invention is as described above, but the present invention is not limited to the same example. For example, in a round trip, the cleaning device 18 cleans the first one way, and then returns. For the latter one-way trip, instead of the cleaning device 18, an attachment exclusively for suction may be attached.

(Effects of the Invention) As detailed above, the present invention comprises a traveling machine in which the front and rear running sections are connected in a flexible manner within a curved seawater conveying passage, and a cleaning device that is detachably attached to the front running section. The cleaning machine is carried in, and the cleaning machine is positioned on the central axis of the seawater conveyance passage by the front and rear travel guide arms, and the cleaning machine is made to travel along the seawater conveyance passage between predetermined areas, and at the same time, the cleaning machine is moved at the front end of the traveling machine. A rotating body is rotated about the central axis of the seawater conveying passage, and at the same time, a cleaning brush protruding from the circumferential side of the rotating body is brought into contact with the inner circumferential surface of the seawater conveying passage, thereby removing the adhesive force from the inner circumferential surface. At the same time, a crushing hammer attached to the circumferential side of the rotary body is rotated along an inscribed circle locus that touches the inner circumferential surface of the seawater conveying passage to remove the hard marine organisms that have adhered to the inner circumferential surface. A seawater conveyance passage characterized by crushing marine life, at the same time inhaling the peeled and crushed marine life through a suction pipe protruding from the rotary body, and simultaneously discharging this inhalation material from the suction pipe to the outside of the seawater conveyance passage. A self-propelled traveling machine is constructed by connecting the front and rear running parts in a flexible manner, and the front and rear running parts of the running machine come into contact with the inner circumferential surface of the seawater conveying passage, and the said running machine Front and rear traveling guide arms that position the seawater on the central axis of the seawater conveyance passage are provided radially projecting in all directions, and a cleaning device is detachably attached to the tip of the traveling machine positioned by these front and rear traveling guide arms. The device includes one device having a cleaning brush attached to its circumferential side that contacts the inner circumferential surface of the seawater feeding passage, and a cleaning brush that contacts the inner circumferential surface of the seawater feeding passage on the circumferential side of the cleaning device. The cleaning device is a cleaning device consisting of a crushing hammer that is rotatably driven, or the other device is provided with a vertically extendable part, and a lifting base that extends in a 90° direction is attached to the lifting base, and a lifting guide that can be freely folded is attached to the lifting base. The cleaning device includes an arm and a rotating rod, and a cleaning brush and a crushing hammer attached to the tip of the rotating rod, and this one device or another device is used as a cleaning device, and the rotating body is equipped with a cleaning brush and a crushing hammer. This is a cleaning machine for the inner circumferential surface of the seawater conveying passage, in which a suction pipe facing the inner circumferential surface of the seawater conveying passage is installed, and this suction pipe is communicated with a discharge pipe introduced from outside the seawater conveying passage, so that it has the following effects. .

That is, since one cleaning device can be replaced with another device, it is possible to clean not only the main pipe but also the inner circumferential surface of a small-diameter vertical pipe branched from the main pipe.

Since the cleaning machine is positioned and fixed on the central axis of the seawater conveyance passage by the front and rear traveling guide arms, the rotating body rotates around the central axis of the seawater conveyance passage, and both the main pipe and the branch pipe are connected to the seawater conveyance line. It can be rotated without damaging the inner wall of the passage.

A rotating body is rotated at the front end of a traveling machine that bends to follow the shape of the seawater conveyance passage, and uses a cleaning brush to peel off weakly adhesive sea creatures, and a crushing hammer to crush and peel off hard sea creatures. The crushed sea life is discharged from the suction pipe to the outside of the seawater conveyance passage, so seawater can be conveyed safely and efficiently without the need for personnel to work inside the seawater conveyance passage, which is bent, generates harmful gases, and is slippery. The inner peripheral surface of the passage can be cleaned.

In addition, since the crushing hammer is rotated along the inscribed circle locus in contact with the inner circumferential surface of the seawater conveying passage to crush hard sea creatures, the inner circumferential surface of the seawater conveying passage is not damaged.

[Brief explanation of the drawing]

FIG. 1A is a side view of a cleaning machine according to an embodiment of the present invention, FIG. 1B is an exploded side view of the same cleaning machine, and FIG.
2 is a sectional view taken along the line CC in FIG.
Figures A and B are explanatory diagrams of a cleaning method according to an embodiment of the present invention, Figures 4A to G are explanatory diagrams of the running cycle of the cleaning machine in the same cleaning method, and Figure 5 is an explanatory diagram of the cleaning machine in the same cleaning method. FIG. 6 is a diagram explaining the background of the present invention, and FIGS. 7A to 7C are diagrams explaining the prior art. DESCRIPTION OF SYMBOLS 1...Cleaning machine, 2...Traveling machine, 3...Front running part, 4...Rear running part, 8...Seawater conveyance passage, 9...
Inner peripheral surface, 10...Front travel guide arm, 11...
Rear traveling guide arm, 19...Rotating body, 24...
Cleaning brush, 25... Crushing hammer, 27... Inscribed circle locus, 28... Suction pipe, 29... Discharge pipe, 37... Vertical extension/contraction section, 38... Lifting base,
39... Lifting guide arm, 40... Rotating rod, 4
3...Central axis line, 48...Sea creatures with weak adhesion,
49...Hard sea creatures.

Claims (1)

[Scope of Claims] 1. A cleaning machine consisting of a traveling machine whose front and rear running sections are connected in a flexible manner and a cleaning device detachably attached to the front running section is carried into a bending seawater conveyance passage,
This cleaning machine is positioned on the central axis of the seawater conveyance passage by a front and rear traveling guide arm, and the cleaning machine is made to travel by itself between predetermined areas along the seawater conveyance passage,
At the same time, at the front end of the traveling machine, a rotating body is rotated about the central axis of the seawater feed passage, and at the same time, a cleaning brush protruding from the circumferential side of the rotary body is brought into contact with the inner peripheral surface of the seawater feed passage. This inner periphery is removed by peeling off weakly adhesive sea creatures from the surrounding surface, and at the same time rotating a crushing hammer attached to the circumferential side of this rotating body along an inscribed circle locus that is in contact with the inner periphery of the seawater conveying passage. Crushing hard sea creatures adhering to the surface, at the same time inhaling the detached and crushed sea creatures with a suction pipe protruding from the rotating body, and simultaneously discharging this inhaled material from the suction pipe to the outside of the seawater conveying passage. A distinctive method for cleaning the inner peripheral surface of seawater conveyance passages. 2 A self-propelled traveling machine is constructed by connecting the front and rear running parts in a flexible manner, and the front and rear running parts of this running machine are in contact with the inner peripheral surface of the seawater conveyance passage, and the said traveling machine is connected to the central axis of the seawater conveyance passage. Front and rear traveling guide arms for positioning on a line are provided radially projecting in all directions, and a cleaning device is detachably attached to the tip of the traveling machine positioned by these front and rear traveling guide arms. A crushing hammer is provided with a cleaning brush that contacts the inner circumferential surface of the seawater feeding passage on the circumferential side, and is rotatably driven along an inscribed inner locus that contacts the inner circumferential surface of the seawater feeding passage on the circumferential side of the cleaning device. A cleaning device or other device is provided with a vertically extendable part, and an elevating base extending in a 90° direction is attached to the elevating base, and a foldable elevating guide arm and a rotating rod are attached to the elevating base. and a cleaning device consisting of a cleaning brush and a crushing hammer attached to the tip of this rotating rod, and this one device or another device is used as a cleaning device, and the rotating body has a cleaning device that is attached to the inner circumferential surface of the seawater conveying passage. A cleaning machine for the inner circumferential surface of a seawater passageway, which is equipped with a suction pipe directed toward the seawater passageway, and the suction pipe is connected to a discharge pipe introduced from outside the seawater passageway.