JP2000246203A - Apparatus for removing scale - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove scale generated in an underground water catchment tank installed in an underground tank simply and surely. SOLUTION: An apparatus in which a fluid ejection nozzle such as a water ejection nozzle 10 is introduced into an underground water catchment tank 2 through a maintenance pipe line 3, and fluid such as water is sprayed to scale 4 from the nozzle 10 to remove it is composed of an apparatus main body 11 having the nozzle 10 and a lengthy hanging tool 12 for hanging/ supporting the apparatus main body. The apparatus main body has a mechanism for rotating/oscillating the nozzle 10, and the hanging tool has flexibility to be taken up on a reel 21 on the ground. A hose for supplying water to the nozzle 10 is used as the hanging tool. A holding mechanism 17 for holding the apparatus main body to the pipe line 3 is provided. A monitoring camera and a light source are mounted on the apparatus main body. A cleaning nozzle for cleaning the lens of the camera and the light source is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment facility in an underground tank, and more particularly to a scale removing device for removing scale generated in a groundwater collecting tank.

[0002]

2. Description of the Related Art An example of an underground tank is shown in FIGS. This is a large-scale one for crude oil storage, 100 m in diameter and 60 m in depth. In this type of underground tank, a large number of drainage pipes 1 made of perforated pipes are buried in the entire wall, and a groundwater collecting tank 2 is provided at the lower part of the wall, and the groundwater that has penetrated the wall is provided. Through a drain pipe 1 to a groundwater collecting tank 2 for treatment. Reference numeral 3 denotes a maintenance pipe for gas detection, which is provided vertically so as to communicate with the groundwater collecting tank 2 from the ground.

[0003]

By the way, in this kind of underground tank, depending on the quality of the groundwater collected by the drainage pipe 1, its constituents precipitate and as shown in FIG. Icicle-shaped scale 4 may be generated at the open end. If such a scale 4 is left as it is, it is supposed that the scale 4 will gradually grow and block the drain pipe 1. Therefore, when the scale 4 occurs, it is necessary to remove it at an early stage. Required,
It is said that it is necessary to develop an effective and appropriate device for that purpose.

[0004]

According to the first aspect of the present invention, a tip of a drainage pipe for collecting groundwater buried in a wall of an underground tank is opened to a groundwater collecting tank provided at a lower portion of the wall. A removal device that is applied to an underground tank configured to collect groundwater in a groundwater collecting tank and that removes scale attached to a tip portion of the drain pipe, wherein the removal device is provided substantially vertically from the ground. A fluid injection nozzle is fed into the groundwater collecting tank through a maintenance pipe whose tip is open to the groundwater collecting tank, and fluid is sprayed from the fluid jet nozzle to the tip of the drainage pipe. The apparatus is configured to remove scale adhering to the apparatus, the apparatus includes a device main body that is provided with the fluid ejection nozzle and is sent from the maintenance pipe to the groundwater collecting tank, and suspends the device main body. The apparatus main body comprises a swivel mechanism for horizontally swiveling the fluid injection nozzle in the groundwater collecting tank by remote control from the ground. And a swinging mechanism for swinging up and down, and the hanging member has flexibility, and can be wound up on a reel and fed out from the reel on the ground.

According to a second aspect of the present invention, in the first aspect of the present invention, a hose for supplying a fluid to the fluid ejection nozzle is also used as the hanger.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the apparatus main body is provided with a holding mechanism for holding the apparatus main body with respect to the maintenance pipeline.

[0007] The invention of claim 4 is the invention of claim 1, 2, or 3
In the invention, a monitoring camera is mounted on the apparatus main body so that an image thereof can be monitored on the ground.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, a light source for photographing is mounted on the apparatus main body.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, a cleaning nozzle for performing cleaning by spraying a cleaning fluid on the lens of the surveillance camera and the light source is mounted on the apparatus main body. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The removal device of this embodiment is shown in FIGS.
This is applied to the underground tank having the structure shown in FIG. 5. The water injection nozzle (fluid injection nozzle) 10 is fed into the groundwater collecting tank 2 by using the maintenance pipe 3, and the water injection nozzle 10 is used. A device body 11 provided with a water injection nozzle 10 by jetting water (fluid) toward the tip of the drain pipe 1 to remove the scale 4 attached thereto. It comprises a hanging tool 12 for hanging and supporting the apparatus main body 11.

The apparatus main body 11 has a nozzle holder 13 provided at the front end thereof so as to be able to expand and contract forward.
The water jet nozzle 10 is attached to the tip of the nozzle, and has a turning mechanism 14 for turning the nozzle holder 13 in the horizontal direction and a oscillating mechanism 15 for oscillating the nozzle holder 13 in the vertical direction. By operating the turning mechanism 14 and the oscillating mechanism 15 by remote control from the user, the direction of the water injection nozzle 10 in the groundwater collecting tank 2 can be freely adjusted. In addition, a holding mechanism 17 is provided at the upper part of the apparatus main body 11 for holding and fixing the apparatus main body 11 itself to the maintenance pipe 3 by pressing the reaction force plate 16 against the inner surface of the maintenance pipe 3. Holding mechanism 1
7, the water jet nozzle 10 is positioned by holding the upper portion of the apparatus main body 11 with respect to the maintenance pipeline 3, and the reaction force when the water jet nozzle 10 is swung and swung can be easily taken. It can be done.

A monitoring camera (television camera) 18 capable of photographing the inside of the groundwater collecting tank 2 is mounted on the nozzle holder 13 of the apparatus body 11, and a light source 19 used for photographing is provided. The turning mechanism 14, the oscillating mechanism 15, and the holding mechanism 17 are remotely controlled from the ground while monitoring the image from the monitoring camera 18 on a monitor installed on the ground, and the below-described monitor installed on the ground is described later. By operating the reel 21 and the sheave 22, the water jet nozzle 10 can be positioned and operated. Further, the nozzle holder 13 is provided with a cleaning nozzle 20 for spraying cleaning water (cleaning fluid) to the lens of the surveillance camera 18 and the light source 19. The cleaning can be performed by supplying a part of the water supplied to the water injection nozzle 10 to the cleaning nozzle 20 by remote control.

The inner diameter of the maintenance pipe 3 is 450.
Since the outer diameter of the apparatus main body 11 needs to be smaller than that, the inner diameter of the apparatus main body 11 must be less than 250 mm as shown in FIG.
Since the annular partition plate 23 having a center hole of about mm is provided, at least the water jet nozzle 10 and the lower end of the rod 11 can enter the groundwater collecting tank 2 through the center hole of the partition plate 23. It is necessary to keep it.

On the other hand, the above-mentioned hanging tool 12 is a long one which is attached to the tip of the apparatus main body 11 so as to suspend and support the apparatus main body 11 and is passed through the maintenance pipe 3. In the embodiment, a flexible hose for sending water to the water jet nozzle 10 is also used as the hanging device 12, and the hose as the hanging device 12 is attached to the reel 21 on the ground as shown in FIG. Rewindable and its reel 2
1, and a water supply device (not shown) is connected to a base end thereof. Reference numeral 22 in FIG. 1 denotes a sheave provided at a position immediately above the maintenance pipeline 3 for extending and lifting while holding the hanging tool 12.

Although not shown, hydraulic cylinders are employed as driving sources for the turning mechanism 14, the oscillating mechanism 15, and the holding mechanism 17, and the hydraulic cylinders are mounted on the ground. A hydraulic hose is connected between the power supply and the source device.
The power cable, the signal cable, the operation cable, and the like connected to the light source 8 and the light source 19 are all flexible, and they are bundled integrally with the hose as the hanging member 12. 12 and the above reel 21
So that it can be wound up. Or,
The cables may be individually wound on another reel separately from the hanging tool 12.

In order to remove the scale 4 generated in the groundwater collecting tank 2 by the above-configured scale removing device,
The apparatus main body 11 is inserted into the maintenance pipeline 3 with the water injection nozzle 10 directed downward, the hose as the hanging tool 12 is drawn out from the reel 21 and lowered while the apparatus main body 11 is suspended and supported by the sheave 22. When the nozzle holder 13 enters the groundwater collecting tank 2, the main body 11 is held by the holding mechanism 17, and the turning mechanism 14 and the oscillating mechanism 15 are operated to direct the water jet nozzle 10 to the scale 4 to be removed. . The above operations are performed by remote control while the light source 19 is turned on, an image is captured by the monitoring camera 18, and the image is monitored on the ground. If the lens and the light source 19 of the monitoring camera 18 become dirty during the above-mentioned operation and good photographing cannot be performed, cleaning may be performed by the cleaning nozzle 20.

When the water injection nozzle 10 is correctly directed to the scale 4, the water injection nozzle 10 is passed through a hose (hanger 12).
And pressurized water is supplied thereto, and the jet water from the water injection nozzle 10 is applied to the scale 4 and dropped into the groundwater collecting tank 2. When the monitoring camera 18 confirms the removal of the scale 4, the supply of water is stopped, the water jet nozzle 10 is turned downward, the holding by the holding mechanism 17 is released, and the hose (the hanging tool 1) is released.
The work is completed by winding up 2) and lifting the apparatus main body 11 to the ground.

In the above embodiment, a hose for supplying water to the water injection nozzle 10 is also used as the suspending device 12 for suspending and supporting the apparatus main body 11. However, when it is impossible or inconvenient, the hose is used. For example, a wire, a chain, or the like may be adopted as a hanging tool, and may be wound up and fed out. Further, as for the holding mechanism 17, the monitoring camera 18, the light source 19, the cleaning nozzle 20, and other components in the above embodiment, it is needless to say that the design can be freely changed including the presence or absence of these components. Further, if the swing mechanism 15 has two stages, the water injection nozzle 10 is held via a telescopic arm, and the water injection nozzle 10 itself is rotatable, it is possible to inject water over a wider range. Water can also be sprayed on the ceiling surface and wall surface of the groundwater collecting tank 2,
It is also possible to remove water by blowing water into the inside.

Further, in the above embodiment, the scale is removed by injecting water from the water injection nozzle. However, the scale may be removed by spraying not only water but also other liquids or gas such as air or gas. In that case, an optimal nozzle may be used according to the fluid used. The same applies to the cleaning nozzle.

[0020]

According to the first aspect of the present invention, a fluid injection nozzle is fed into a groundwater collecting tank through a maintenance pipe, and fluid is sprayed from the fluid injection nozzle to the scale to remove the fluid. It is composed of an apparatus main body equipped with a nozzle and a long hanging tool for suspending and supporting the apparatus main body,
The device body has a mechanism for swiveling and swinging the fluid injection nozzle, and the hanging device has flexibility that can be wound up on a reel on the ground, so that scale removal work can be easily performed by remote control from the ground. In addition to being able to be carried out reliably, the configuration is simple and the operation is simple, and it is suitable to be applied to maintenance of an underground tank or the like for storing crude oil.

According to the second aspect of the present invention, since the hose for supplying the fluid to the fluid ejecting nozzle is also used as the hanger, it is rational and the configuration can be further simplified.

According to the third aspect of the present invention, since the holding device for holding the apparatus main body with respect to the maintenance pipe is provided, the positioning of the fluid ejecting nozzle can be surely performed, and the fluid ejecting nozzle can be secured. The reaction force at the time of changing the direction can be taken without hindrance.

According to a fourth aspect of the present invention, since a monitor camera is mounted on the apparatus main body and the work is performed while monitoring the image on the ground, remote control from the ground can be easily and accurately performed. .

According to the fifth aspect of the present invention, since the light source for photographing is provided, photographing can be performed without any trouble by the surveillance camera, and a clear image can be photographed.

According to the sixth aspect of the present invention, since the monitoring camera is provided with the cleaning nozzle for cleaning the lens and the light source, the lens and the light source can be cleaned even during the operation.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall schematic configuration of a scale removing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a main part of the apparatus.

FIG. 3 is a vertical sectional view showing an example of an underground tank.

FIG. 4 is a plan view of the same.

FIG. 5 is a diagram showing a groundwater collecting tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage pipe 2 Groundwater collecting tank 3 Maintenance pipeline 4 Scale 10 Water injection nozzle (fluid injection nozzle) 11 Main unit 12 Hanging device (hose) 14 Swivel mechanism 15 Swing mechanism 17 Holding mechanism 18 Monitoring camera 19 Light source 20 Cleaning nozzle 21 reel 22 sheave

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadashi Takano 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Inside (72) Inventor Mitsuo Mouri 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Incorporated (72) Inventor Kazuyuki Nagabuchi 1-6-4 Osaki, Shinagawa-ku, Tokyo Harmony Corporation F-term (reference) 3B116 AA13 AB51 BB22 BB32 BB45 BB55 CD41

Claims (6)

[Claims] An end of a drainage pipe for groundwater collection buried in a wall of an underground tank is opened to a groundwater collection tank provided at a lower portion of the wall to collect groundwater in the groundwater collection tank. A removal device that is applied to an underground tank and removes scale attached to a tip portion of the drain pipe, wherein the removal device is provided substantially vertically from the ground, and a tip of the removal device is provided in the groundwater collecting tank. A structure in which a fluid injection nozzle is fed into the groundwater collecting tank through an open maintenance pipe, and a scale attached to the drainage pipe is removed by spraying a fluid from the fluid injection nozzle to the tip of the drain pipe. The removal device is provided with the fluid ejection nozzle, and is passed through the maintenance pipe to the groundwater collecting tank from the maintenance pipe, and is passed through the maintenance pipe to suspend and support the apparatus body. The apparatus main body includes a turning mechanism for turning the fluid ejection nozzle horizontally in the groundwater collecting tank and a oscillating mechanism for swinging vertically in the groundwater collecting tank by remote control from the ground. The scale removing device, wherein the hanging tool has flexibility, and can be wound on a reel on the ground and can be fed out from the reel. 2. The scale removing device according to claim 1, wherein the hanging device also serves as a hose for supplying a fluid to the fluid ejection nozzle. 3. The scale removing apparatus according to claim 1, wherein the apparatus main body includes a holding mechanism for holding the apparatus main body with respect to the maintenance pipeline. 4. The scale removing device according to claim 1, wherein a surveillance camera is mounted on the apparatus main body so that images from the surveillance camera can be monitored on the ground. 5. The scale removing apparatus according to claim 4, wherein a light source for photographing is mounted on the apparatus main body. 6. The scale removing apparatus according to claim 5, wherein a cleaning nozzle for spraying a cleaning fluid onto the lens of the monitoring camera and the light source to clean the lens is mounted on the apparatus main body. .