JPH09209999A - Ballast water surface water lifting device in double hull oil tanker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively and securely check ballast water surface water by providing a float having an ejector inside to float on the surface of ballast water through a sounding pipe having plural holes continuously provided in a length direction in an outer circumference, and lifting the surfacewater by the ejector. SOLUTION: In a lifting device 1, a float 2 is provided to float on surface water W of ballast water L through a sounding pipe 37 having plural holes 37a continuously provided in a length direction in an outer circumference as a guide pipe. The surface water w gets into the sounding pipe 37 through the hole 37a. The float 2 is provided with an ejector 3 having a surface water inlet port 3b, and a compression air supply machine 5 is connected by a jet tube 4. In addition, it is connected to a storage part 7 by a discharge tube 6. Compression air is introduced from the compression air supply machine 5 to the ejector 3, and the surface water W invading into the sounding pipe 37 by action of the ejector is lifted to the storage part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention pumps ballast water to the upper deck to check whether oil is floating on the surface of the ballast water that is being poured into the ballast tank of a double hull oil tanker. It relates to the device.

[0002]

2. Description of the Related Art In recent years, oil tankers have been designed to prevent oil from leaking from the cargo tank when the ship or the bottom of the ship is impacted, and in addition, to prevent marine pollution by the leaked oil, There is also one that uses a double hull at the bottom of the ship and uses this as a ballast tank. In such a double hull oil tanker, when the ballast water in the ballast tank is drained to the ocean, if oil content from the cargo tank leaks and mixes into the ballast water, marine pollution may occur. Therefore, before draining the ballast water, it is necessary to check whether the ballast water contains oil. Conventionally, if oil content was mixed in the ballast water during this check, the oil content floats on the ballast water surface.Therefore, the oil content floats on the ballast water surface by opening the opening on the upper deck. It was done by visually observing whether or not it is.

[0003]

However, in the case of a double hull oil tanker, the width of the side portion of the ship is narrow, and there are several structural members in the horizontal direction, and there is no lamp inside the ballast tank. Since it is dark, it is difficult to check if oil is mixed in the ballast water by looking into the ballast tank through the opening of the upper deck as described above when the surface of the ballast water is at a considerably low position. There is such a problem. In other words, in the conventional double hull oil tanker, while taking into consideration marine pollution due to oil leakage, it was not possible to accurately check the oil contained in the discharged ballast water.

The present invention is intended to solve the above-mentioned problems, and in a double hull oil tanker, whether or not oil is leaked from the cargo tank into the ballast tank and mixed into the ballast water. When visually checking, there is no need to look into the ballast tank that is narrow, dark, and hard to see, and by pumping ballast water to the upper deck, you can check in a wide, bright, and easy-to-see place. Since it is possible to pump only ballast water surface water that may have the necessary oil content floating in it, we provide a ballast water surface water pumping device for double hull oil tankers that enables efficient and reliable checking. The purpose is to do.

[0005]

In order to achieve the above object, a ballast water surface water pumping device in a double hull oil tanker of the present invention is a bathymetric sounding device installed from an upper deck to an inner bottom portion of a ballast tank. A floating body that is inserted into the pipe and floats on the ballast water surface, an ejector that is provided inside the floating body and that has a fluid jet port, a surface water suction port, and a fluid discharge port, and a fluid of the ejector through the jet pipe. A compressed air supply device for injecting compressed air to the injection port, and a surface that is sucked from the surface water intake port of the ejector by the injection of compressed air and further pumped from the fluid discharge port of the ejector to the upper deck through the discharge pipe. It is equipped with a storage part for storing water, and the sounding pipe has a proper position on the outer circumference of the sounding pipe.
A plurality of holes are provided so as to be continuous in the lengthwise direction, and if necessary, the shape of the floating body is a sphere, and a weight is provided below the sphere.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The ballast water surface water pumping apparatus for a double hull oil tanker of the present invention, when discharging ballast water, determines whether or not oil is mixed in the ballast water. Water surface Used to pump water to the upper deck for checking. Ballast water, especially surface water, can freely flow in and out of the sounding pipe,
A plurality of holes are provided at appropriate places on the outer periphery so as to be continuous in the length direction, and if the oil component floats on the ballast water surface, it will also enter the inside of the sounding pipe. Furthermore, in the pumping device, the floating body is inserted from the sounding pipe and floated on the surface of the ballast water, and the compressed air is jetted from the compressed air supply device to the fluid jet port of the ejector provided inside the float body through the jet pipe. By the injection of the compressed air, the surface water suction port of the ejector located on the surface portion of the ballast water sucks the surface water of the ballast water, and the sucked surface water is discharged from the fluid discharge port of the ejector. It is pumped through the pipe to the storage area on the upper deck.

In this pumping device, the floating body floats on the surface of the ballast water, and only the surface water of the ballast water is sucked up inside the floating body and pumped up to the upper deck. Therefore, if oil is mixed in the ballast water, The oil content floats on the surface of the ballast water, so it can be checked reliably, and because the check is performed in an easy-to-see location, the narrow deck that is narrow, dark, and difficult to see as in the past It can be very suitable as compared to doing it by looking through it.

When the shape of the floating body is a sphere,
It is possible to smoothly move inside the sounding pipe without being caught by the sounding pipe when it is inserted into the sounding pipe and when it is lifted up from the sounding pipe, and it is possible to perform quick pumping and checking. Further, since the weight is provided in the lower portion, the upper and lower sides of the spherical body are positioned, and the surface water suction port of the ejector can be reliably positioned on the surface of the ballast water.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ballast water surface water pumping apparatus for a double hull oil tanker of the present invention will be described below with reference to the drawings. First, a first embodiment corresponding to claim 1 will be described with reference to FIGS. 1 and 2. Figure 1
Pumping device for ballast water surface water in a double hull oil tanker according to an embodiment (hereinafter, simply referred to as a pumping device)
FIG. 2 is a schematic view showing a cross section of a double hull oil tanker (hereinafter simply referred to as an oil tanker) having ballast tanks to which the above is applied on the ship side and the bottom of the ship, and FIG. FIG. The pumping device 1 pumps up the ballast water L poured into the ballast tank 35 in order to check whether or not oil is mixed in the ballast tank of the oil tanker 31 described below.

Oil tanker 3 to which the pumping device 1 is applied
1, the oil tanker 31 does not have the entire structure, but as shown in FIG.
In order to prevent oil from leaking from the ocean to the ocean, and in addition to prevent ocean pollution due to the leaked oil, the vessel side 32 and the bottom 33 of the vessel are double hulls. It is a double hull oil tanker used as the tank 35. Here, the ballast tank 35 on the ship side 32
An example in which the pumping device 1 is used will be described. There are many horizontal hull members in the ballast tank 35 of the oil tanker 31, and even if the pumping device 1 is hung from the opening provided in the upper deck 36, the horizontal hull members will interfere and make you think. It is difficult for the floating body 2 to reach the surface of the ballast water L. On the other hand, the oil tanker 31 has a ballast tank 3
From the bottom of 5 to the upper deck 36, the ballast tank 35
A sounding pipe 37 (nominal diameter 40 mm) for measuring the depth of the ballast water L therein is installed. In addition, 34 in FIG. 1 shows a cargo tank.

Further, the pumping apparatus 1 uses the sounding pipe 37 as a guide pipe for the floating body 2, and further, the sounding pipe 3 is used.
As shown in FIG. 2, a plurality of holes 37a are formed on the outer circumference of the hole 7 so as to be continuous in the length direction, and the surface water w of the ballast water L is
The inside and outside of the sounding pipe 37 is freely accessible. The reason for this is that, as in the conventional case, a cylindrical shape is provided for the purpose of simply measuring the depth of the ballast water, and the surface water of the ballast water is constant inside the sounding pipe. This is because there is an inconvenience that even if oil is floating outside, it cannot be checked. That is, since the oil content floats on the surface water w of the ballast water L, if the surface water w of the ballast water L can freely enter and exit through the hole 37a of the sounding pipe 37, the above inconvenience will be solved and the check accuracy will be high. Therefore, a plurality of holes 37a having an arbitrary shape are provided on the outer circumference of the sounding pipe 37 so as to be continuous in the length direction.

The pumping device 1 of the present invention inserted into the sounding pipe 37 of the oil tanker 31 having the above-mentioned structure has the floating body 2 inserted into the sounding pipe 37 and floated on the surface of the ballast water L, and the floating body 2. A fluid injection port 3a provided inside,
A compressed air supplier for injecting compressed air to the fluid ejecting port 3a of the ejector through the ejector 3 having the surface water suction port 3b and the fluid ejecting port 3c, and the ejection pipe 4 made of a lightweight material such as vinyl. 5 and the surface water suction port 3b of the ejector 3 by the injection of compressed air, and is pumped from the fluid discharge port 3c of the ejector 3 to the upper deck 36 via the discharge pipe 6 made of a lightweight material such as vinyl. And a storage section 7 for storing the surface water w. The shape of the floating body 2 of the pumping-up device 1 of the first embodiment is substantially cylindrical, and the vertical length shown in the drawing is a sounding pipe 37.
Is larger than the inner radius of the sounding pipe, and has a length that does not easily turn upside down. Also, the diameter is set to be slightly smaller than the inner diameter of the sounding pipe 37 so as not to easily tilt to the left and right shown in the drawing. . Further, the floating body 2 is chamfered at the joint between the outer peripheral surface and the top and bottom surfaces so that the floating body 2 does not get caught during insertion or withdrawal inside the sounding pipe 37.

The floating position of the floating body 2 on the surface water w is the floating body 2 itself, the ejector 3, the injection pipe 4, the discharge pipe 6,
And, as shown in the figure with the weight including the surface water w being pumped up from the discharge pipe, the surface water suction port 3b is arranged so that the surface water w can be sucked. As described above, in the pumping device 1, since the shape of the floating body 2, the floating position in the surface water w of the floating body 2, and the mounting position of the surface water suction port 3c are determined, no special operation or surveying is required, Only surface water w can be pumped up.

In the operation of the pumping device 1 having the above structure, when compressed air is injected from the compressed air supply device 5, the compressed air is injected from the fluid injection port 3a of the ejector 3 via the injection pipe 4.
At this time, the velocity energy of the compressed air ejected from the fluid ejection port 3a toward the fluid ejection port 3c at high speed is converted into pressure (suction) energy inside the ejector 3, and this pressure (suction force) sucks the surface water. The surface water w is sucked from the mouth 3c, and the sucked surface water w is discharged from the fluid discharge port 3c and stored in the storage portion 7 arranged on the upper deck 36 via the discharge pipe 6. Then, the surface water w stored in the storage unit 7 checks whether or not the ballast water L contains oil.

By the way, the compressed air supplier 5 may be newly installed, or may be installed onboard the ship.
Further, since the floating body 2 is chamfered inside the sounding pipe 37 so as not to be caught, the work can be performed smoothly, and the cylindrical floating body 2 has the same shape.
Since it is prevented from tilting in the left-right direction when it is inserted into, the floating body 2 does not overturn and cannot be floated at an appropriate position. Further, since the weight is taken into consideration also in the vertical positional relationship, the position of the surface water suction port 3b is maintained in an appropriate state, and only the surface water w of the ballast water L can be pumped up. Can be reliable.

Next, a second embodiment corresponding to claim 2 will be described with reference to FIG. FIG. 3 is a diagram showing a configuration and a usage state of the pumping device. The pumping apparatus 11 according to the second embodiment is different from the first embodiment in that a spherical floating body 12 is used in place of the floating body 2 of the first embodiment, and a weight 13 is used in a lower part thereof. The points used for the oil tanker 31 shown in FIG.
This is the same as the embodiment.

In this way, by making the shape of the floating body 12 spherical, the floating body 12 is not caught by the sounding pipe 37 when it is inserted into the sounding pipe 37 and when it is pulled out from the sounding pipe 37, and the sounding is smoothly performed. The inside of the pipe 37 can be moved, and the work can be performed quickly. Further, since the weight 13 is provided below the floating body 12, the upper and lower sides of the floating body 12 are positioned, and the surface water suction port 3b of the ejector 3 can be reliably positioned immediately below the surface of the ballast water L. Therefore, only the surface water w can always be pumped up, and the check becomes highly reliable. Further, it is possible to obtain the same effect as that of the first embodiment.

Further, the present invention is not limited to the above-mentioned embodiment, and various modifications can be made. For example, the shapes of the floating bodies 2 and 12 are not particularly limited to the above-mentioned shapes, and at least the vertical and horizontal positional relationships are determined. It is hard to tilt and the ejector 3
It suffices that the surface water suction port 3 of the ejector 3 has a shape so as to be arranged immediately below the surface water w, and the fluid ejection port 3a of the ejector 3
Although the fluid to be injected into the above is the compressed air in the above, it may be any gas, and the effects of the present invention can be obtained by these deformations.

[0019]

As described above, according to the ballast water surface water pumping device for the double hull oil tanker of the present invention, the sounding pipe should have a plurality of holes continuous in the longitudinal direction at appropriate positions on the outer circumference thereof. Since the ballast water is provided and can freely enter and leave the sounding pipe through the hole, it is possible to keep the ballast water inside the sounding pipe under the same conditions as those outside the sounding pipe. . Then, a floating body is inserted inside the sounding pipe and floated on the surface of the ballast water, and compressed air is ejected from the fluid ejecting port of the ejector inside the floating body to inject the surface water of the ballast water from the surface water suction port of the ejector. Is sucked in and discharged from the fluid discharge port of the ejector, and is pumped up to the storage part of the upper deck via the discharge pipe, so if oil content is mixed in the ballast water, it can be surely checked. Moreover, since the check is carried out in a wide, bright, and easy-to-see place, the reliability of the check is improved and no marine pollution is caused. It also makes it possible to find areas of ballast tanks that may be damaged.

According to the ballast water surface water pumping device for the double hull oil tanker of the present invention, the floating body is formed into a spherical shape, so that when the floating body is inserted into the sounding pipe,
Also, when pulled up from the sounding pipe, it can be moved smoothly inside the sounding pipe without being caught by the sounding pipe.
The pumping and checking can be done promptly. Further, since the weight is provided in the lower portion, the upper and lower sides of the spherical body are positioned, and the surface water suction port of the ejector can be reliably positioned on the surface of the ballast water.

[Brief description of drawings]

FIG. 1 is an oil tanker having a ballast tank to which a ballast water surface water pumping device for a double-hull oil tanker according to a first (second) embodiment of the present invention is applied, in the ship width direction. It is a schematic diagram showing in section.

FIG. 2 is a diagram showing a configuration and a usage state of a ballast water surface water pumping device in the double hull oil tanker according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a configuration and a use state of a ballast water surface water pumping device in a double hull oil tanker according to a second embodiment of the present invention.

[Explanation of symbols]

1 (ballast water surface water in double hull oil tanker) pumping device 2 Floating body 3 ejector 5 compressed air supply device 7 storage section 11 (ballast water surface water in double hull oil tanker) pumping device 12 floating body 13 weight 31 oil tanker 35 ballast tank 37 sounding pipe 37a hole L ballast water w (ballast water) surface water

Claims (2)

[Claims] 1. Surface water located on the surface portion of the ballast water that is injected into the ballast tank of a double hull oil tanker having a ballast tank on the bottom and on the ship side is introduced from the upper deck to the bottom of the ballast tank. Which is a device for pumping using a sounding pipe, wherein the floating body is inserted into the sounding pipe and floated on the surface of the ballast water, and a fluid injection port, a surface water suction port provided inside the floating body,
And an ejector having a fluid discharge port, a compressed air supply device for injecting compressed air to the fluid injection port of the ejector through an injection pipe, and suction from the surface water intake port of the ejector by injection of the compressed air And a storage part for storing surface water pumped from the fluid discharge port of the ejector to the upper deck through the discharge pipe, and the sounding pipe has a plurality of holes at appropriate positions on the outer circumference thereof. A ballast water surface water pumping device for a double hull oil tanker, which is provided so as to be continuous in the length direction. 2. The ballast water surface pumping device for a double hull oil tanker according to claim 1, wherein the shape of the floating body is a sphere, and a weight is provided in the lower portion thereof.