JPH06343941A - Method and apparatus to remove substance adhering to water channel by water injection - Google Patents

Abstract

PURPOSE:To carry out adhering substance removing work without impairing the special coating applied face of an inlet channel, remarkably reduce the working labor and maintain the safety for workers. CONSTITUTION:While a water sprinkling work car is made running in water channel, water is injected to wall face by water injecting nozzle 73 installed in the working car side to remove the substances such as shells adhering to the wall face and remove them. A sprinkler 79 is installed in the main body 59 of the car through an ascending and descending frame 69 and a water supplying apparatus to supply high pressure water to the sprinkler is connected to the sprinkler.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing deposits such as shells attached to ceiling wall surfaces and side wall surfaces of water passages such as cooling water intake passages for nuclear power plants.

[0002]

2. Description of the Related Art For example, a large facility such as a nuclear power plant is provided with a groove-shaped or tunnel-shaped seawater intake. This seawater intake is connected to each facility through the intake channel, but seaweed, shellfish, etc. adhere to the wall surface of this intake channel for a long time. If such an adhered substance increases, the amount of water taken in will decrease, so it is necessary to regularly remove and collect it. Conventionally, the work of collecting the above-mentioned deposits relied on manpower.
In particular, a method is used in which shells and the like adhering to the walls such as side walls and ceilings are scraped off to the floor surface with a scoop or the like, and the adhered matter that has fallen onto the floor surface is scraped off with a bulldozer or the like and collected.

[0003]

However, in the above-mentioned prior art, the scraping work such as a bucket is used to scrape off the adhered matter adhered to the special coating surface provided on the wall surface of the intake channel to prevent the adhesion of shellfish, algae and the like. In this case, in addition to the problem that the special coating surface is scraped off together with the adhered matter, it is costly and efficient to carry in a large work vehicle or the like to scrape the wall surface where the amount of the adhered matter is relatively small.

[0004]

In order to solve the above-mentioned problems, the method of the present invention uses a water discharge work vehicle 59 in a water passage.
Water discharge nozzle 7 attached to the traveling work vehicle 59
3, high-pressure water is sprayed on the wall surface of the water passage, and the sprayed water removes and collects deposits such as shellfish attached to the wall surface. In addition, in the water discharge device for removing the deposits adhering to the wall surface such as the water intake port,
A lifting frame 69 is movably attached to the lifting frame 69, a water discharge nozzle 73 for injecting high pressure water toward the inner wall surface of the water passage is attached to the lifting frame 69, and a water supply device 92 for supplying high pressure water is connected to the water discharge nozzle 73. The first feature is that Further, a structure for attaching the water discharge nozzle 73 to the elevating frame 69 is provided with a boss portion 79 rotatably attached to the elevating frame 69 side and a water discharge pipe 74 radially branched from the boss portion 79. The second feature is that the sprinkler 79 is formed by being attached to the tip of the water pipe 74 while being inclined downward in the rotation direction.

[0005]

The vehicle main body 59 travels in the water passage while moving up and down the elevating frame 69 to discharge water from the water spouting nozzle 73 of the sprinkler 79 toward the wall surface to remove adhering substances, and at the boss 79, the elevating frame 69 Rotate against it to remove a wide range of deposits. The water supply device 92 supplies high-pressure water to the sprinkler 79.

[0006]

[Examples] As shown in FIG. 9, the removal and recovery work of deposits performed by using the method and apparatus of the present example shows a case where it is carried out at an intake of an existing nuclear power generation facility, , The water passage of the intake port is from the seawater inlet side, the rear part of the screen chamber (a), the intake channel (b) and the circulating water pump chamber (c) connected to the intake channel (b) at the back side, and auxiliary equipment cooling. The irrigation canal (d) is connected in the form of a tunnel with a rectangular cross section.

In this example, the middle water intake channel (b) is specially coated on the ceiling surface and the concrete surface of the side wall to prevent shellfish from adhering, so that damage and peeling can be prevented. In addition to the prevention, since the amount of attached algae and shellfish is originally small, the water discharge removing device 59 shown in FIGS. 5 to 8 described later is used to remove the attached substances on these wall surfaces.
High-pressure water is supplied from the high-pressure water truck 96 to the water discharge removing device 59 via a hose 97.

On the other hand, the wall surfaces of the other rear part (a) of the screen chamber, the circulating water pump chamber (c) and the water passage (d) for cooling the auxiliary equipment remain the concrete surface and a large amount of algae and shellfish adhere to them. Therefore, the scraping and collecting device (car) 1a or 1b shown in FIG. 9 is used to directly scrape and drop the adhered matter on the wall surface, and the suction device (vacuum collecting work vehicle) 57 on the ground sucks and collects.

Also, when the adhering substances are removed by the water discharge removing device 59, the adhering substances on the floor surface are scraped off, and the adhering substances dropped or accumulated on the floor surface are recovered by the scraping recovery devices 1a, 1b. . The scraping and collecting device 1a is disclosed in Japanese Patent Application No. 4-17183.
The old type shown in the specification and drawings and the apparatus 1b shown in FIGS. 1 to 4 described later are used.

Embodiments of the method and apparatus of the present invention will be described below in detail with reference to the accompanying drawings. The scraping-type adhering substance crushing and collecting apparatus 1 of the present embodiment shown in the drawing has a main body 2, a traveling body 3,
It has a scraping means 4 and a collecting means 5. The main body 2 is mounted on the traveling body 3 and is horizontally rotatable with respect to the traveling body 3. As this rotating mechanism, the same mechanism as that used in conventional crane trucks, shovel trucks and the like can be used. The traveling body 3 has, on the left and right, a crawler portion 13 having a drive wheel 8, a driven wheel 9 and an endless body 12.

The main body 2 mounted on the traveling body 3 is provided with an operating portion 17 at which the operator gets in at a substantially central position. A scraping means 4 is provided at the front end of the main body 2. The scraping means 4 includes a lifting arm 17, a bucket (or blade) 19 for scraping, and cylinders 21 and 2.
2 and 23. The elevating arm 17 is provided at the front end of the main body 2 via a fulcrum 24, and the bucket 19 is swingably connected to the tip of the elevating arm 17 by a link mechanism including link connecting pins 31 and 32. In such a configuration, the elevating arm 17 is moved up and down by the expansion and contraction operation of the cylinders 21 and 22, and the bucket 19 performs an oscillating motion by the expansion and contraction operation of the cylinder 23. Further, the elevating arm 17 is horizontally rotated by the expansion and contraction operation of the cylinder 25 provided on the side of the base end portion of the elevating arm 17 shown in FIG.

The bucket 19 is provided with a lid-shaped or frame-shaped blade, and the blade can scrape off the adhered matter adhering to the wall surface. The scraping means 4 brings the edge of the bucket 19 along the wall surface to move the elevating arm 17, or moves back and forth together with the main body 2 in a state of placing the edge along the wall surface to move the edge to the wall surface. Touch the deposit and scrape it. The adhering matter scraped off by the edge drops onto the floor surface on which the traveling body 3 is placed.

Next, a description will be given of the collecting means 5 for collecting the deposits that have fallen on the floor. As shown in FIGS. 3 and 4, the casing 5a of the collecting means 5 includes a top plate 31 and a pair of left and right side plates 3.
2, 33 and the back plate 34, and the front surface and the bottom surface are open. Brackets 36, 36 for fixing the collecting means 5 to the main body 2 side are arranged side by side on the rear plate 34, and the brackets 36, 36 are provided on an arm 37 projecting to the front left and right sides of the traveling body 3. , 37 are detachably fixed to the tip side. It is also possible to mount the collecting means 5 on the traveling body 3 so as to be able to move up and down so as to avoid the amount of scraping attachment kimono and other road surface collisions during traveling.

The side plates 32 and 3 are provided in the case of the recovery means 5.
3, a rotary shaft 41 that constitutes a scraping rotor 44 is supported in the left-right direction, and a scraping blade 42 formed of a rectangular plate-like member is radially provided at regular intervals on the outer circumference of the rotary shaft 41. Is projected on. On the lower side of the scraping rotary shaft 41, the scraping blade 42 has a cross-sectional shape that is curved in an arc along the rotation locus of the tip side, and the tip side is in contact with or extremely close to the ground floor. A bottom plate 43 is provided between the side plates 32 and 33. A plate 46 is attached to the scraping blade 42 such that the tip of the scraping blade 42 projects from the tip of the scraping blade 42, and a scraping rotor 44 is configured as a whole.

A rotary shaft 4 for crushing is provided behind the bottom plate 43.
7 is axially supported between the side plates 32 and 33 in parallel with the rotary shaft 41, and a large number of blade-shaped grinding protrusions 48 each having a rectangular shape smaller than the scraping blade 42 are provided on the outer periphery of the grinding rotation shaft 47. Are provided to form a crushing rotor 45. The crushing protrusions 48 are vertically provided along the rotation direction of the rotary shaft 47, and are arranged in a spiral shape that advances from the left and right sides toward the center of the rotary shaft 47. As a result, the shells and the like scraped by the scraping blade 42 are crushed by the crushing blade 48.
While being crushed into pieces, they are gathered together at the central position of the shaft 47. Further, below the rotary shaft 47, a cylindrical bottom plate 49 curved along the rotation locus of the tip side of the crushing protrusion 48 is provided between the side plates 32 and 33 so as to be connected to the front bottom plate 43. .

Between the two rotary shafts 41 and 47, the adhering material that has been splashed up by the crushing rotor 45 is scraped into the rotor 44.
The partition plate 51 that prevents it from falling to the side is the top plate 3.
It is drooping from 1. A vacuum suction port 52 is provided below the rear plate 34 of the casing 5a.
2, a suction hose 53 is attached, and the suction hose 53 is connected to a suction device equipped with a vacuum pump prepared outside. It is also possible to use a screw conveyor tube, a bucket type conveyor, or the like as a means for carrying these out.

The operation of the rotating shaft drive system and the collecting means will be described. One end of each of the rotating shafts 41 and 47 projects from the side plate 33 of the casing 5a, and sprockets 91 and 92 are provided at each projecting end. ing. A chain 54 is wound around the sprockets 91 and 92, and the chain 54 simultaneously serves as the top plate 31 of the casing 5a.
It is also wound around the sprocket 93 of the drive motor (hydraulic motor) 56 fixed to the. With such a configuration, both rotary shafts 41 and 47 are rotated by the drive of the drive motor 56.

The rotating shaft 41 for scraping rotates in a direction such that the lower side of the scraping blade 42 rotates backward, and the adhering substances scraped while being crushed by this rotation are splashed by the scraping blade 42. It is lifted or lifted along the curved surface of the bottom plate 43, falls to the bottom plate 49 side, and is crushed by the crushing blades 48 rotating at high speed. The crushed deposits are gathered in the center by the crushing blades 48 that rotate so as to draw the spiral locus, and are collected from the suction port 52 into the suction device 57. By the way, the shell and the collected material scraped off contain a large amount of water, and are suitable for suction collection by vacuum.

As shown in FIG. 9, the suction device 57 is a suction recovery vehicle which is installed near the water intake port and is connected to the recovery means 5 by the suction hose 53. The structure of the suction device 57 includes a receiver tank for separating the sucked deposit from the air, a water scrubber for separating micron dust through water, a powerful blower, and the like. As for the suction capacity, the air volume during suction is 75-100 m ³
/ Min, static pressure of -650 to -700 mmHg is sufficient.

On the other hand, both rotary shafts 4 in the recovery means 5
The number of rotations of the main body 2 and the number of rotations of the rotary blade are 2.
In the case of about 2 to 4.2 km / h, the rotation shaft 41 for scratching is about 100 rpm, and the rotation shaft 47 for grinding is about 200 rpm.

Next, a water discharge type deposit removing method and device used for removing and collecting deposits on the special coating portion of the wall surface of the intake channel will be described. As shown in FIGS.
A general forklift is used for the vehicle, an operating portion 61 for an operator to ride on is provided in the approximate center of the vehicle body, and an elevating device 62 is provided on the front side of the vehicle body 59.

As for the structure of the elevating device 62, guide frames 63, 63 are attached to the vehicle body 59 in parallel with each other in the vertical direction, and inside the guide frames 63, 63, along the guide frames 63, 63. Sliders 64, 64 that move up and down are inserted and attached. Inside the sliders 64, 64, sprockets 66, 67 are attached above and below the sliders 64, 64, respectively.
Chains 68, 68 are wound around 7.

The elevating frame 69 located in front of the sliders 64, 64 is attached to the chain 6 via a mounting plate.
8 and 68 are attached to the chains 68 and 6
According to the reversible rotation of 8, the upper and lower sprockets 66 and 67 are moved up and down. A holding plate 71 is provided on the lifting frame 69.
Are provided so as to extend horizontally to the front side, and support pipes 72 are detachably attached to both sides of the tip of the holding plate 71, and a cross shape having nozzles 73 is provided on both end sides of the support pipe 72. Sprinklers 75 each composed of a water discharge pipe 74 and a boss portion 79 forming an intersection of the water discharge pipes are rotatably attached. A water supply hose 93 is connected to both ends of the support pipe 72 on the side where the water discharge pipe 74 is attached.

On the other hand, a lower plate 76 is provided in the left and right direction below the rear side of the guide frame, and a cylinder 77 is erected upright in the substantial center of the lower plate 76, and the upper end of the cylinder 77 is left and right on the upper ends of the sliders 64, 64. It is fixed to the upper plate 78 provided in the direction.

Further, a convex member 81 is provided at a substantially central portion on the tip side of the holding plate 71, and in the case of discharging water toward the ceiling wall of the intake channel, as shown in FIG. The cylinder 82 is fitted and erected on the convex member 81. A holding member 83 having a T-shape in a front view is attached to the upper end side of the cylinder 82, and a cross-shaped water discharge pipe 84 is provided on both left and right end sides of the holding member 83, and a nozzle 85 and a discharge nozzle 85 attached upward to the tip thereof. Sprinklers 89, each of which is composed of a boss portion 88 forming an intersection of the water pipes 84, are rotatably supported. The water discharge pipe 8
Nozzles 85 are attached to the respective ends of No. 4, and water supply hoses 94 are connected to the water discharge pipe 84 mounting side at both ends of the holding member 83.

In the water spray truck constructed as described above, the cylinders 77 are expanded and contracted to raise and lower the sliders 64 and 64 during operation, and the chains 68 and 68 are reversibly rotated by the operation of the hydraulic motor. ，
By elevating the elevating frame 69 attached to 68,
The water discharge pipe 74 can be adjusted to an arbitrary height. In addition, when water is discharged onto a particularly high ceiling wall, the sliders 64, 6
4. In addition to raising the lifting frame 69 to the upper limit, the cylinder 82 can be extended.

The nozzles 73 and 85 attached to the ends of the water discharge pipes 74 and 84 respectively have an inclination angle of 2 ° to 5 ° in the opposite rotation direction from the right angle with respect to the rotation direction of each sprinkler. Due to the inclination angles of 73 and 85, the water discharge pipes 74 and 84 rotate in a certain direction (direction opposite to the nozzle direction) around the cross-shaped intersection by the reaction at the time of water discharge. Number of rotations of water discharge pipes 74, 84 and nozzles 73, 8
The jet water pressure of No. 5 is not particularly limited, but the moving speed of the vehicle body 59 is 6.5 to 14.5 km / h, and the rotation speed is 20 to
The injection pressure is about 100 rpm and the injection pressure is about 35 kg / cm ² .

The operating portion 61 is provided with a roof member 86 for protecting the operator from splashes when water is discharged, and a water pressure gauge 87 for checking the water pressure. As shown in FIG. 9, when the water discharge type removing device is used for removing work, the adhering matter that has fallen to the ground is collected by the subsequent scraping and collecting work vehicle 1a. Further, the water discharge type vehicle main body is connected to the high pressure water truck 96 by the water supply hose 97 as shown in FIG. 9, but in addition to this, the vehicle main body 59 may be equipped with a water supply tank and a water supply pump. Others The method and apparatus of the present invention can be applied not only to the intake of a nuclear power plant, but also to a canal for introducing seawater into a brackish lake, a canal for fresh water, and the like.

[0029]

According to the present invention configured as described above,
Adhesives adhering to the walls of water passages such as intakes are dropped using jet water spraying means, so even if special paints are applied to the walls, work to remove the adhering substances without damaging the surface of the special paint Can be done. Further, even if the wall surface is a surface other than the special coating surface, the treatment cost is low and the efficiency is high when the amount of deposits is small. In this case, since the removal work is performed if the vehicle travels while jetting water, it is possible to significantly reduce the work effort and ensure the safety of the worker. Also, if the water discharge pipe is moved up and down to bring the adhering substances to a close range to discharge water, the jetting of water can be performed with a strong pressure on the adhering substances, so that the removal work can be reliably performed. Furthermore, since the sprinkler automatically rotates during water discharge, a wide water discharge range can be taken and work efficiency is improved evenly.

[Brief description of drawings]

FIG. 1 is a side view showing an adhering substance crushing and collecting apparatus.

FIG. 2 is a front view showing an adhering substance crushing and collecting apparatus.

FIG. 3 is a plan view showing an adhering substance crushing and collecting apparatus.

FIG. 4 is a perspective view showing an internal structure of a collecting means.

FIG. 5 is a side view showing a water discharge type deposit removing device.

FIG. 6 is a front view showing a water discharge type deposit removing device.

FIG. 7 is a plan view showing a water discharge type deposit removing device.

FIG. 8 is a partially enlarged view showing the attachment structure of the water discharge pipe.

FIG. 9 is an overall view showing a work of removing deposits on a water intake.

[Explanation of symbols]

 59 Vehicle main body 62 Lifting device 69 Lifting frame 73 Nozzle 74 Water discharge pipe 79 Sprinkler 84 Water discharge pipe 85 Nozzle 89 Sprinkler 92 Water supply device

Claims (3)

[Claims] 1. A water discharge working vehicle (59) is run in a water passage, and a water discharge nozzle (7) attached to the running work vehicle (59).
3) A method of removing deposits on a water passage by jetting high-pressure water onto the wall surface of the water passage according to 3), and removing and collecting deposits such as shellfish attached to the wall surface by the sprayed water. 2. A lifting frame (6) for a vehicle body (59).
9) is attached so as to be able to move up and down, and a water discharge nozzle (7) for injecting high-pressure water toward the inner wall surface of the water passage is attached to the lifting frame (69).
3) An attached matter removing device for a water passage by jet water discharge, which is provided with a water supply device (92) for supplying high-pressure water to the water discharge nozzle (73). 3. A water discharge nozzle (7) is attached to a lifting frame (69).
The structure for attaching 3) has a boss portion (79) rotatably attached to the lifting frame (69) side and the boss portion (7).
9) is provided with a water discharge pipe (74) branched radially, and a water discharge nozzle (73) is attached to the tip of the water discharge pipe (74) while being inclined downward in the rotational direction to form a sprinkler (79). Item 2. A device for removing deposits on a water passage by jetting water according to Item 2.