JPH0920284A - Oil recovery device having draft regulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a maximum effect through the minimum increase of weight by a method wherein each of the drafts of a plurality of floating bodies is measured by utilizing an air pressure and based on the measurements, an air amount in the floating body is regulated, and a draft is controlled to a value optimum to an oil recovery work. SOLUTION: A daft regulating device comprises an air tube 6; an air compressor 7; a flow rate control valve 8; a pressure/electricity converter 10; shut-off valves 13 and 14; and first and second coupling rubes 9 and 11. A very small amount of air is fed to the air tube 6, arranged along a floating body 1 to the lower end positioning of each float body 1, from the air compressor 7 on a ground through a flow rate control valve 8 and a first coupling tube 9. A pressure in the air tube 6 is measured and a present drat value is determined. A set draft value is compared with a present draft value, and when the present draft value is lower, the shut-off valve 14 is opened, the shut-off valve 13 is closed and air in the floating body 1 is discharged. In a reverse case, reverse operation is effected to feed air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil recovery device for recovering oil spilled over the sea (water), and more particularly in a weir oil recovery device for recovering oil spilled on the surface of water. The present invention relates to an oil recovery device equipped with a draft adjusting device for maximizing the inflow amount and optimizing the draft during movement.

[0002]

2. Description of the Related Art Conventionally, there are known oil recovery ships that self-navigate to locations where oil spills float, but there is the disadvantage that the oil recovery ships themselves become large and lack agility, and in terms of manufacturing costs, etc. Has proposed an oil recovery device. This oil recovery device is cheaper and more versatile than an oil recovery ship, so that it is very useful from the viewpoint of agility when oil flows out in a narrow area.

[0003]

However, unlike an oil recovery ship, an oil recovery device generally does not have a ballast or the like,
Since it is not equipped with a draft adjusting device, it is difficult to know what state it is in by simply observing the oil recovery device from a remote location such as on land.

Therefore, in the conventional oil recovery apparatus, it is not possible to perform a proper operation, the amount of oil recovery is decreased, the water content is increased, and the original performance of the oil recovery apparatus cannot be exhibited. there were.

Considering the improvement of the performance of the oil recovery apparatus, it is necessary to grasp the present situation first, and then it is necessary to develop an apparatus capable of controlling the air amount of each floating body of the oil recovery apparatus to control the optimum draft. For this reason, it is possible to add ballast tanks used in ships, but using such large-scale ballast tanks will increase the weight of the oil recovery device and complicate maintenance. However, the agility inherent in the oil recovery device is lacking, which is not practical.

In order to solve the above-mentioned problems, the present invention is to provide an oil recovery apparatus provided with a draft adjusting device which brings about the maximum effect with the minimum increase in weight.

[0007]

SUMMARY OF THE INVENTION An oil recovery device equipped with a draft adjusting device according to claim 1 of the present application comprises a plurality of floating bodies, a support section connected to the floating bodies, and an oil recovery system connected to the support sections. In an oil recovery device for recovering an oil film floating on the water surface, which is provided with a pump, each draft of a plurality of floating bodies for holding on the water surface is continuously measured using air pressure, and the measured data is used as a basis. In addition, the amount of air in each floating body is adjusted so that the draft can be controlled to an arbitrary value suitable for oil recovery work and movement.

An oil recovery apparatus having a draft adjusting device according to a second aspect of the present invention includes a plurality of floating bodies, a support portion connected to the floating bodies, and a pump for feeding the recovered oil connected to the support portions. An oil recovery hose connected to the pump for recovering an oil film floating on a water surface, and an opening formed on the lower surface of each floating body and communicating with the floating body, and a lower end position of each floating body 1. An air tube along with a draft adjusting device, the draft adjusting device comprising an air compressor, a flow control valve, a pressure / electric converter, a shutoff valve, a first connecting tube, A second connecting tube, wherein the air compressor and the air tube are connected to the flow control valve and pressure /
A first connecting tube is connected via an electric converter, the air compressor and an opening on the lower surface of the floating body are connected by a second connecting tube via a stop valve, and a small amount of air is connected by the first connecting tube. Is supplied to the air tube, the pressure in the air tube when exhausted from the end of the air tube is measured based on the pressure / electric converter, and the air compressor is closed based on the measured data. It is characterized in that the air in the floating body is supplied or exhausted by the second connecting tube via the valve.

According to a second aspect of the present invention, each floating body is divided into upper and lower compartments, the upper compartment is sealed, and the opening is formed in the lower surface of the lower compartment.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Each draft of a plurality of floating bodies for holding an oil recovery device on the water surface is continuously measured using air pressure, and the air amount in each floating body is calculated based on this measurement data. It is adjusted so that the draft can be controlled to any value suitable for oil recovery work and transportation.

More specifically, each of the floating bodies is provided with an opening formed on the lower surface thereof and communicating with the floating body, an air tube extending along the lower end of each floating body 1, and a draft adjusting device. Is an air compressor, a flow control valve, a pressure / electric converter, a shutoff valve, a first connecting tube,
A second connecting tube, wherein the air compressor and the air tube are connected by the first connecting tube via the flow control valve and the pressure / electric converter, and the air compressor and the opening on the lower surface of the floating body are closed valves. Connected by a second connecting tube via the first
A small amount of air is supplied to the air tube by the connecting tube of, and the pressure in the air tube when exhausted from the end of the air tube is measured based on the pressure / electric converter,
Based on the measured data, the air in the floating body is supplied or exhausted from the air compressor through the stop valve by the second connecting tube. Therefore, first, low-pressure air is supplied to the air tubes along each floating body. Draft is grasped by measuring the air supply pressure when flowing and bubbling from the lower end of the tube to balance the water pressure. Next, air is independently taken in and out of each floating body to control the draft to a required value. Further, even if the draft of each floating body is the same or different, the draft of the entire oil recovery apparatus can be adjusted by setting the same draft and then simultaneously supplying and controlling the same amount of air to each floating body. In this way, by grasping the draft of each floating body and supplying air to each floating body, the inclination of the oil recovery device is adjusted and the draft of the oil recovery device is adjusted.

Each floating body is divided into upper and lower compartments, the upper compartment is sealed, and the opening is formed in the lower surface of the lower compartment to supply and exhaust air, but the upper compartment is sealed. Therefore, each floating body can stably float.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

1 to 7 show an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is an explanatory view of a floating body, FIG. 3 is an overall configuration diagram of an oil recovery device, and FIG. FIG. 5 is an explanatory view of a cross section of a main part of the suction port, FIG. 5 is an explanatory view when measuring a draft, FIG. 6 is a flowchart showing an example of draft control, and FIG. 7 is a configuration diagram showing an example of a control device.

As shown in FIG. 1, the oil recovery apparatus S according to the present embodiment mainly comprises a plurality of floating bodies 1, a frame 2 which is a supporting portion, a pump 3 for feeding oil, and an oil feeding hose 5. As an element.

As shown in FIGS. 1 and 2, the floating body 1 of this example is composed of a cylindrical body, and is composed of three at one end, one at the front end and two at both rear sides. It is connected to the shape. In the connected state of this example, the upper surface and the lower surface of the floating body 1 are connected by the frame 2.

Each floating body 1 of this example is formed by being divided into two upper and lower sections. The upper section 1a is hermetically sealed, and the lower section 1b has an opening 1c formed on the lower surface. This opening is connected to a second connecting tube 11 described later.

As shown in FIG. 1, the oil feed pump 3 of this embodiment is arranged at a substantially central position of the floating body 1 and is connected to and held by the frame 2. A suction port 4 is formed at a position above the oil feed pump 3, and the suction port 4 is located on the water surface. The suction port 4 sucks oil floating on the water surface.

A hose 5 is connected to the discharge port of the oil feed pump 3, and the hose 5 feeds the oil to a recovery oil tank (not shown) on land.

The draft adjusting device C of this embodiment includes an air tube (water pressure sensing pipe) 6, an air compressor 7, and a flow control valve 8.
The pressure / electricity converter 10, the stop valves 13 and 14, the first connecting tube 9, and the second connecting tube 11 are provided.

The air tube 6 of this example is a water pressure sensing tube, and is arranged along the position of the lower end of each floating body 1, as shown in FIG. The connection between each floating body 1 and the air tube 6 can be performed by various known and known techniques.
For example, it is possible to use means such as forming an engaging component having a recess on the side surface of each floating body 1 and locking the air tube 6 in this recess.

The air compressor 7 of this example is arranged on land, and the air compressor 7 and the air tube 6 are connected to each other via the flow control valve 8 and the pressure / electric converter 10 as a first connecting tube. Connected at 9. In addition, the air compressor 7 and the opening 1c on the lower surface of each floating body 1 are connected to each other via the stop valves 13 and 14.
Are connected by a connecting tube 11.

The pressure / electricity converter 10 of this embodiment is generally put on the market as a sensor (element), and there are various kinds of sensors (elements). For example, the piezo effect (certain crystal) The one utilizing the principle of generating voltage when pressure is applied to the body) and the one utilizing change in capacitance due to pressure change of semiconductor have high sensitivity and are suitable for draft measurement according to the present invention.

A small amount of air is supplied to the air tube 6 along the lower end of each floating body 1 from an air compressor 7 installed on land through a flow control valve 8 and a first connecting tube 9. It The pressure in the air tube 6 when this supply air is exhausted from the air tube end 6a against the water pressure is measured, and this measurement data is converted into a voltage by the pressure / electric converter 10.

Each of the floating bodies 1 supports the weight of the oil recovery apparatus S, and in order to send air into the floating body 1, it is necessary to send the air by the air compressor 7. Therefore, when supplying air to the floating body 1, the stop valve 13 is opened and the stop valve 14 is opened.
Is closed and air is sent by the air compressor 7. When the exhaust valve is closed, the stop valve 13 is closed, and when the stop valve 14 is opened, the air in the floating body 1 is under pressure, so that the stop valve 14 ejects itself.

Next, the draft control of the floating body 1 will be described in more detail. Although one floating body will be described here for convenience, the relationship with each floating body is that if the inclination is corrected, the draft of each floating body should be measured individually and aligned with the average value, and if the draft is changed. By moving air in and out so that the draft of each floating body 1 becomes a measured value, it is possible to perform the same means even if there are any number of floating bodies.

The draft of the floating body 1 is Dm. When the flow control valve 8 is slightly opened and air is sent from the air compressor 7 to the air tube (water pressure sensing tube) 6 and discharged as air bubbles from the air tube end 6a, the air tube 6 corresponds to the water pressure of the draft Dm. Pressure is generated and balanced. And if the specific gravity of seawater is 1.025, the pressure P is

P = D × 1.025 / 10 = 0.1025
・ D (kgf / cm ² )

This pressure becomes the pressure / electric machine converter 10
Read on. If the target value is Am, when converted to pressure,

P _A = A × 1.025 / 10 = 0.102
5 · A (kgf / cm ² )

Therefore, the floating body 1 is adjusted so that P becomes P _A.
The air will be taken in and out. In this way, if the pressure / electricity converter 10 uses the electric data (measurement data), it is possible to know the current draft of the floating body 1.

The buoyancy of each floating body 1 is adjusted by supplying or exhausting air from the connecting tube 11 to the lower section 1b through the shutoff valves 13 and 14 based on the measured data converted into voltage, thereby controlling the draft. You can do it.

Next, a description will be given based on the flowchart relating to the above operation. Here, for example, an input device (for example, a keyboard, a mouse, an input pen, or reading preset data) 21, an arithmetic unit (including a CPU) 22, a display device (CRT, liquid crystal display device, etc.) as shown in FIG. ) 23, an external storage device (floppy disk, magnetic disk, magneto-optical disk) 24, and the like, the case where the draft adjustment is performed by the control device 20 will be described. The control device 20 is merely an example, and various types can be used.

The target draft value is input from the input device 21, and the preset draft value is input and set in step 100. Next, in step 110, the pressure inside the air tube 6 is measured. The pressure inside the air tube 6 is measured as described above.

Then, in step 120, processing is performed. This process is because it is necessary to obtain the current draft value from the measured pressure P _B (kgf / cm ² ), and the current draft is the draft B = P _B × 10 / 1.025 = P _B / 0. 1025
(M). Therefore, the process of step 120 is P _B /
The arithmetic processing of 0.1025 is performed by the arithmetic unit 22. By this processing, the current draft value is displayed on the display device 23 in step 130.

Next, at step 140, the draft setting value A and the current draft value B are compared. If A = B, the process ends in step 170. If the comparison in step 140 is A> B, the air in the floating body 1 is discharged in step 150. Then, the process loops to step 110. If the comparison in step 140 is A <B, air is supplied to the floating body 1 in step 160. Then, the process loops to step 110. The processing of step 140 is also performed by the arithmetic unit 22.

Then, step 150 and step 160
Regarding, as described above, when supplying air to the floating body 1, the stop valve 13 is opened, the stop valve 14 is closed, and the air is sent by the air compressor 7. When exhausting, close the stop valve 13,
Since the air in the floating body 1 is under pressure when the shutoff valve 14 is opened, the air is blown out from the shutoff valve 14 by itself.

Since the current draft of each floating body 1 is obtained as electric data in this manner, if a draft target value is set, it is possible to automatically control from the difference. Generally, the shut-off valves 13 and 14 are electromagnetic valves, and a sequencer is used to store the control for keeping the oil recovery device horizontal and the target value of the draft of the entire oil recovery device.
It can be operated automatically according to instructions. Of course, it can be performed manually.

In the above embodiment, the example in which the draft adjusting device C is arranged on land is shown, but the draft adjusting device C is arranged on the work boat to arrange the recovered oil tank on land or the draft adjusting device. The C and the recovered oil tank can be arranged on the work boat, and can be suitably used in a shallow water where the work boat cannot enter or in a place having a complicated shape that cannot be handled by the work boat.

[0040]

As described above, according to the present invention, it is possible to know the current draft of a floating body by using the pressure / electric converter as electric data,
The draft of each floating body can be changed. Therefore, when an external force acts on the oil recovery device and the oil recovery device is tilted, the draft of the floating body on the tilted side is lowered to balance and return it to a horizontal position, preventing the intake of air from the oil suction port, It is possible to recover oil without mixing and recovering various moisture.

Further, by changing the draft of the entire oil recovery apparatus, it is possible to perform work such as deepening the draft when moving and shallowing when recovering the oil.

Further, according to the present invention, the draft of the oil recovery device is controlled, and when the oil film on the water surface is thick, the draft is deepened,
It is possible to prevent air from being sucked in and to suck more oil. In addition, when the oil film is thin, the rate of absorbing water becomes high, so the draft is made shallow. Such delicate draft adjustment is difficult by visual remote control, but according to the present invention, it can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an oil recovery device according to the present invention.

FIG. 2 is an explanatory diagram of a floating body.

FIG. 3 is an overall configuration diagram of an oil recovery device.

FIG. 4 is a cross-sectional explanatory view of an essential part of an oil suction port.

FIG. 5 is an explanatory diagram when measuring a draft.

FIG. 6 is a flowchart showing an example of draft control.

FIG. 7 is a configuration diagram showing an example of a control device.

[Explanation of symbols]

 1 Floating Body 2 Frame 3 Pump 4 Suction Port 5 Hose 6 Air Tube (Water Pressure Sensing Pipe) 7 Air Compressor 8 Flow Control Valve 9 Connection Tube 10 Pressure / Electric Converter 11 Connection Tube 12 Oil Film 13 Stop Valve 14 Stop Valve C Draft Adjustment apparatus

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 14, 1995

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

[Fig. 2]

[Figure 3]

FIG. 4

[Figure 5]

FIG. 7

FIG. 6

Claims (3)

[Claims] 1. An oil recovery apparatus for recovering an oil film floating on a water surface, comprising: a plurality of floating bodies, a support portion connected to the floating bodies, and an oil recovery pump connected to the support portions. The draft of each floating body for holding is continuously measured using air pressure, and the amount of air in each floating body is adjusted based on the measured data, and the draft is suitable for oil recovery work and movement. An oil recovery device equipped with a draft adjusting device characterized in that it can be controlled to an arbitrary value. 2. A plurality of floating bodies, a supporting portion connected to the floating bodies, a pump for feeding recovered oil connected to the supporting portion, and an oil feeding hose connected to the pump. In an oil recovery device for recovering an oil film floating on the water surface, an opening formed on the lower surface of each floating body and communicating with the floating body,
An air tube extending to the lower end position of each floating body 1 and a draft adjusting device are provided, and the draft adjusting device includes an air compressor, a flow control valve, a pressure / electric converter, a stop valve, and a first valve. 1 connecting tube and a 2nd connecting tube, The said air compressor and the said air tube are connected by the 1st connecting tube via the said flow control valve and a pressure / electricity converter, The said air The compressor and the opening on the lower surface of the floating body are connected by a second connecting tube via a stop valve, and a small amount of air is supplied to the air tube by the first connecting tube.
The pressure inside the air tube when exhausted from the end of the air tube is measured based on the pressure / electric converter, and based on the measured data, the second connection is made from the air compressor through the stop valve. An oil recovery device equipped with a draft adjusting device, characterized in that air in a floating body is supplied or exhausted by a tube. 3. The draft adjusting device according to claim 2, wherein each of the floating bodies is divided into upper and lower two compartments, an upper compartment is sealed, and the opening is formed in a lower surface of the lower compartment. An oil recovery device equipped.