JP3517146B2 - Oil splattering prevention device for loading arm - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil leakage scattering prevention device for a marine loading arm used for loading and unloading liquids.

[0002]

2. Description of the Related Art An emergency release device (ERS) is attached to the tip of an arm.
In a loading arm (for example, a marine loading arm) equipped with an oil leakage prevention device that prevents oil leakage from the loading arm side to the outside when the ERS operates, for example, Japanese Patent Laid-Open No. 10-17100.
It is proposed by the publication.

In this conventional oil leakage prevention device for a loading arm, an oil leakage prevention cover for covering the ERS is composed of an upper cover and a lower cover, and further, these upper cover and lower cover form an upper bellows. Connected by lower bellows. In this oil leakage scattering prevention device, the upper bellows and the lower bellows are extended when the arm tip portion is separated from the connected pipe side after the ERS operation. Then, from this state, the connection portions of the upper bellows and the lower bellows are narrowed down, and the narrowed portions are stopped by the velcro so that the upper bellows and the lower bellows are separated from each other.

In particular, after the upper bellows is separated from the lower bellows, the end portion fixed by the magic tape is wound up by a rope and pulled up to prevent oil leakage from the upper bellows side. .

[0005]

However, in the above-mentioned conventional oil leakage scattering prevention device for the loading arm, the periphery (or a part thereof) of the arm tip portion is covered with the upper cover and the lower cover, and the oil leakage is prevented. Although it is possible to prevent the oil from splashing around, the oil may drip from the upper cover after the upper bellows and the lower bellows are separated and before the end portion of the upper bellows is pulled up.

Further, the above-mentioned conventional oil leakage scattering prevention device is ER
Since it is composed of an upper cover and a lower cover that cover S, and an upper bellows and a lower bellows that connect them to each other, the oil splash prevention device itself has a complicated structure, and its external dimensions are large and its weight is large. It tends to be heavy. Such an oil spill prevention device is provided at the arm tip of the loading arm, and when the loading arm is connected to the connected pipe on the ship side, as a result, the oil spill prevention device is temporarily attached only when it is connected. In the case of a ship that is to be installed above and has a limited installation space, a large external dimension hinders the work / passage of workers on the ship. In particular, this is a problem when a large number of oil spill prevention devices are arranged on a single vessel because a plurality of loading arms are used for cargo handling.

Further, the conventional oil-leakage-scattering prevention device has a drawback that it is easily damaged due to the large outer dimension and the large area for receiving wind on the ship. Further, since the weight is heavy, the weight of the main body of the loading arm increases and the foundation load increases when the loading arm is installed on a new loading arm. Therefore, it is necessary to make the strength of the pier sufficient. Further, when installing on an existing loading arm, it is necessary to increase the strength of the loading arm main body, and when the strength of the jetty on which the loading arm is installed is not sufficient, it is necessary to reinforce the jetty. Therefore,
If it is not possible to reinforce the jetty, there is also the problem that the installation of the oil spill prevention device must be abandoned.

The present invention has been made in view of the above circumstances, and has a compact structure, but it is possible to reliably prevent the leakage of oil during the operation of the emergency release device and the dropping of the oil after separation. An object of the present invention is to provide a device for preventing oil leakage from the loading arm.

[0009]

In order to achieve the above object, the invention according to claim 1 is a loading arm in which an emergency releasing device is interposed between an arm tip portion and a connected pipe connected to the arm tip portion. An oil leakage scattering prevention device, an outer cover attached to the arm tip end side so as to cover the emergency release device, and a narrowing means provided at the tip end portion of the outer cover for narrowing down the tip end portion, And a pulling-up unit for pulling the narrowed-down tip end toward the center of the outer cover.

According to the second aspect of the present invention, the narrowing means is constituted by a hole formed at the tip of the outer cover and a wire inserted through the hole, and the pulling means is The motor is configured to wind the wire. In the invention according to claim 3, an oil tank is attached to the connection portion of the connected pipe so as to surround the connection portion, and the inner surface of the outer cover is
An inner cover is attached to close the space between the outer cover and the oil tank.

In the invention according to claim 4, the cover is formed so that its length is longer than the height of the emergency release device, and a holding means for folding and holding the outer cover in the oil tank. It is provided.

(Operation) According to the invention of claim 1, the outer cover can prevent the oil leakage from scattering when the emergency disengagement device is operated. Further, the outer cover can be squeezed while the outer cover is squeezed. By pulling the arm inward toward the center, the oil leakage attached to the inner surface of the outer cover does not drip when the tip of the arm is separated from the connected pipe.

According to the second aspect of the present invention, it is possible to pull the wire inward toward the center of the outer cover while squeezing the tip of the outer cover only by winding the wire by the motor. According to the third aspect of the invention, it is possible to reliably prevent oil leakage from the gap between the outer cover and the oil tank.

Further, according to the invention of claim 4, the outer cover can be fixed with a simple structure so as not to interfere with the cargo handling work when the emergency release device is inoperative.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. 1 to 18. It should be noted that the first embodiment is based on claim 1.
It corresponds to claim 4.

First, the structure of the tip portion (arm tip portion) 10A of the loading arm 10 (outboard arm 13), the emergency disengagement device (hereinafter referred to as "ERS") 30, and the oil splash prevention device 100 is illustrated. 1 to 12 will be described. The arm tip portion 10A is
It is connected to the connecting portion 20A of the connected pipe 20 via the ERS 30 (FIGS. 1 and 2).

The ERS 30 operates in an emergency and operates its ER.
The S valve 31 (FIG. 1) is closed. Here, the ERS valve 31 includes the arm side ERS valve 31A and the ship side ERS.
And a valve 31B. When the arm tip portion 10A and the connecting portion 20A of the connected pipe 20 are disconnected (FIG. 3), the ERS coupler 36 is opened. As shown in FIGS. 1 and 2, the oil spill scattering prevention device 100 is attached so as to cover the arm tip portion 10A and the connecting portion 20A of the connected pipe 20 connected to the arm tip portion 10A.

Specifically, the oil leakage prevention device 100 is
Outer cover 110 attached to the arm tip 10A side
And the oil tank 12 surrounding the opening of the connecting portion 20A of the connected pipe 20.
0, a storage bag (holding means) 130 attached so as to cover the oil tank 120 from the lower side thereof, and a pulling-up device (pulling-up device) for pulling inward while narrowing down the tip portion (drawing port) 110A of the outer cover 110. Means) 140.

Here, the oil tank 120 is the ERS3.
Arm side ERS valve 31 without being purged at the time of operation of 0
The oil remaining between A and the ship-side ERS valve 31B is recovered, and the oil scattered from the ERS 30 without being purged by opening the ERS coupler 36 is directly
Alternatively, the outer cover 110 (and the inner cover 15 described later)
0) and is guided into the oil tank 120.

The oil tank 120 is connected to the connecting portion 20 of the connected pipe 20.
It is formed along the opening so as to surround the opening A and is divided into three chambers in the circumferential direction. In addition, although the oil tank 120 is divided into three chambers in the circumferential direction in the present embodiment, it is not always necessary to divide it in such a manner.
It may be appropriately divided or integrated. In each room,
A drain valve 121 is provided (Fig. 2). The drain valve 121 is for discharging waste oil accumulated in the oil tank 120 (further, accumulated rainwater).

As shown in FIGS. 1, 2, and 4, a storage bag 130 is attached to the oil tank 120 so as to surround the outer periphery thereof. The mounting of the storage bag 130 is performed by attaching a large number of D-shaped metal fittings 13 sewn on the surface of the storage bag 130.
It is carried out by passing elastic attachment bands (for example, rubber cords) 131, 131 through 2, 132, ... And hooking S-shaped hooks 133, 133 attached to the tips on D-shaped metal fittings 132, 132. Incidentally, 37 in the figure is an ERS valve shaft.

The storage bag 130 is for storing the outer cover 110 by folding it so that the outer cover 110 does not get in the way when the ERS 30 is inactive. The folded outer cover 110 is attached to the mounting band 131. It is pressed and held by (Fig. 5). Further, the outer cover 11 described above
0 prevents oil from splashing to the outside of the oil splash prevention device 100 when the arm tip portion 10A is separated from the connecting portion 20A of the connected pipe 20 after the ERS coupler 36 is opened, In addition, the oil attached to the inner surface of the outer cover 110 is guided to the oil tank 120.

As shown in FIGS. 1 and 2, the outer cover 110 has one end (upper end) 110D whose cover mounting member 1
It is fixed to the frame 10B on the arm tip 10A side by 18, 118, and the other end (tip) 110A is fixed to the upper part 120 of the outer peripheral surface of the oil tank 120 by the magic tape 114.
It is detachably attached to A (Fig. 6). In addition, the height of the outer cover 110 is the same as the oil leakage scattering prevention device 10 in the connected state.
It is much longer than the height of 0.

As shown in FIGS. 2, 7, and 8, the outer cover 110 is formed with a collar portion 115.
The stem (not shown) of the butterfly valve penetrates through 5.
Here, the outer cover 110 has a collar 115 from its upper end.
A notched portion 119 is formed up to and the fastener 119A is sewn to the notched portion 119. In addition, the outer cover 110 has a cover portion 1 for covering the cut portion 119.
13 is formed. When attaching the outer cover 110, a stem (not shown) is inserted into the collar 115,
In this state, the collar 115 is closed by the velcro 111 (FIG. 8) sewn on the collar 115, and as shown in FIG.
The fastener 119 is closed, and the cover 113 is attached by the velcro tape 116, so that the fastener 1
19 is covered up.

As shown in FIG. 2, the outer cover 110 is further formed with an opening 117 with a collar.
17 ERC cylinder rod 3 communicating with ERS30
5 is penetrated. An upper end 150A of the inner cover 150 is sewn on the inner surface of the outer cover 110 (FIGS. 1 and 10). The inner cover 150 has a lower end 150.
B is attached to the inner peripheral surface 120B of the oil tank 120 with a velcro (not shown) (FIGS. 1, 2, and 5), and the inner cover 150 closes the space between the outer cover 110 and the oil tank 120. Get off. In this way, the inner cover 150
Since the arm tip portion 10A is provided with the
The outer cover 11 when pulled away from the connection part 20A of 0.
The oil attached to the inner surface of 0 is guided along the inner surface of the inner cover 150 into the oil tank 120.

Here, as shown in FIGS. 11 and 12, the tip portion (drawing port) 110A of the outer cover 110 has copper alloy rings (rings) 111, 111, 111 at regular intervals.
Are arranged, the two wires 141 and 141 are inserted through the rings 111, 111, and the tip portion 110A of the outer cover 110 serves as a purse port. This ring (hole) 11
, 111 and the wire 141 constitute a narrowing-down unit for narrowing down the tip portion (drawing port) 110A.

Further, as shown in FIG. 12, the above-mentioned pulling device 140 has a tip portion 110A having the above-mentioned drawstring structure.
Is pulled up toward the center of the outer cover 110 while being narrowed down. Specifically, the wires 141 and 141 are
It is constituted by hydraulic motors 142, 142 for winding up. That is, the wire 141 is wound around the hoisting roller 143 by the rotation of the hydraulic motors 142, 142, so that the tip end portion (drawing port) 110 of the outer cover 110 is wound.
A is narrowed down and the narrowed tip 110A
Is pulled inward toward the center of the outer cover 110.

Two hydraulic motors 142, 142 are provided (preferably 18 in the peripheral portion of the outer cover 110) so that the front end 110A of the outer cover 110 is not narrowed down.
They are arranged at two places (0 degree symmetry) and are attached to the inside of the frame 10B with bolts. Here, the hydraulic motor 14
The driving source of 2, 142 is the loading arm 10
Of the inboard arm 12 (FIG.
The hydraulic system branched from the rearward rotation hydraulic line is used.

The hydraulic motors 142, 142 are provided with a reverse rotation preventing stopper (not shown) in case of emergency such as when the drive source is exhausted, and the outer cover 110 being pulled up reverses in the middle. It is supposed not to. As will be described later in detail, the pulling-up device 140 configured in this manner starts its operation when the ERS coupler 36 is opened and a predetermined gap is formed between the two ERS coupler surfaces, and the outer cover Pull up while narrowing down 110.

The material of the outer cover 110 to be pulled up is required to have flexibility such as to follow complicated movements such as a squeezing operation by the pulling device 140, non-oil impermeability and the like during cargo handling. It is also necessary to consider the ship fires. Here, a material that satisfies these requirements and is excellent in heat insulation, heat resistance, and fire resistance in consideration of the use environment, and that is sufficiently resistant to deterioration by ultraviolet rays and damage due to long-term exposure to wind is used. To be elected.

Next, the overall configuration of the loading arm 10 to which the oil leakage prevention device 100 is applied will be briefly described with reference to FIG. Loading arm 10
Consists of a rising pipe 11, an inboard arm 12, and an outboard arm 13 fixed to the seabers 1. Between the rising pipe 11 and the inboard arm 12, an inboard arm swivel joint for raising and lowering (rotation). Type pipe joint) 14 is arranged, and between the inboard arm 12 and the outboard arm 13, an outboard arm tilting swivel joint (rotary pipe joint) 15 is arranged. The tip portion 10A of the loading arm 10 configured as described above
However, the cargo handling work is performed by being connected to the connected pipe 20 side through the ERS 30.

Next, the operation of the oil leakage scattering prevention device 100 when the ERS 30 operates will be described with reference to FIGS. 1 and 14 to 18. During normal cargo handling work, the ERS 30 is inoperative, and the arm tip portion 10A and the connected pipe 20 are
Connected to each other by a coupler 36 and ERS3
ERS valve 31 (arm side ER)
The S valve 31A and the ship side ERS valve 31B) are open (FIG. 1). Further, at this time, the outer cover 110 is stored in the storage bag 130 in a folded state, and the oil tank 12 is attached from the outside of the storage bag 130 by the mounting band 131.
It is pressed down to 0 (fixed by the mounting band 131).

When the ERS 30 operates, the arm side ERS valve 31A and the ship side ERS remain in the connected state shown in FIG.
The valve 31B is closed and then the ERS coupler 36
Is opened (Fig. 1), and there is a gap between the upper and lower coupler surfaces (Fig. 14), arm side ERS valve 31A and ship side E
Most of the oil remaining between the RS valve 31B and the RS valve 31B is the oil tank 12.
0 (a thick arrow in the figure), a part of which scatters on the inner surface of the outer cover 110, and then flows down into the oil tank 120 (in the figure,
Thin arrow).

From this state (FIG. 14), when the rearward movement of the inboard arm 12 (the retracting movement of the loading arm 10) is started, first, the lower end 150B of the inner cover 150 attached with the velcro is removed. Oil tank 12
It is peeled off from the inner peripheral surface 120B of 0. At this time, the tip portion (drawing port) 110A of the outer cover 110 remains fixed to the upper portion 120A of the outer peripheral surface of the oil tank 120 with the magic tape 114 (FIG. 15). By this time, most of the folded outer cover 110 is the storage bag 1.
Drawn from 30.

As the loading arm 10 is subsequently retracted, the distance between the arm tip portion 10A and the connecting portion 20A further increases, and the outer cover 110 tip portion (drawing port) 110.
At the timing when A is fixed to the outer peripheral surface upper portion 120A of the oil tank 120 (the state of FIG. 15), the hydraulic motor 14
The hydraulic pressure is supplied to 2, 142, and the winding of the wires 141, 141 is started. The outer cover 110 is the storage bag 1.
The tip portion (drawing port) 110A completely pulled out from 30 and attached with the velcro tape 114 is also the oil tank 12
It is peeled off from the outer peripheral surface upper part 120A of No. 0.

When the wires 141 and 141 are wound around the hoisting rollers 143 and 143 by the operation of the hydraulic motors 142 and 142, the peeled tip 110A of the outer cover 110 is gradually narrowed. Wire 14
Along with the winding of No. 1, the tip portion (drawing-out port) 110A of the outer cover 110 is pulled inward toward the center of the outer cover 110 (FIG. 17) while facing upward (FIG. 12).

When the hydraulic motor 142 is subsequently operated to wind up the wire 141, the tip portion (drawing port) 110A of the outer cover 110 is completely squeezed (FIG. 18).
When this state is reached, the arm tip portion 10A can be freely moved. As described above, according to the oil leakage scattering prevention device 100 of the loading arm 10 of the first embodiment, the tip end portion 110A of the outer cover 110 that covers the arm tip end portion 10A, the connected pipe 20 and the ERS 30 is formed in the purse port. Then, after separating the ERS coupler 36, it can be pulled toward the center while narrowing it down,
Since the tip portion 110A is always open upward from the inoperative state of the ERS 30 to after the separation, it is possible to completely prevent the oil leakage.

Further, since the oil leakage prevention device 100 has the outer cover 110, the oil tank 120, and the lifting device 140 as main components, it has a simpler structure than the conventional oil leakage prevention device. Since it is compact and lightweight, it can easily be added to existing equipment. Further, since the outer shape of the oil spill prevention apparatus can be remarkably reduced in external dimensions as compared with the conventional oil spill prevention apparatus, even if the oil spill prevention apparatus is installed on a ship, it does not interfere with the work / passage of the worker. In addition, since the area that receives the wind can be made sufficiently small, it is suitable for work on a ship where strong winds often blow.

In the first embodiment, the tip portion (drawing port) 110A of the outer cover 110 is connected to the ring 111,
Although the description has been given by taking the example in which the wire 111 and the wires 141 and 141 are used, the structure is not limited to the above, as long as the tip portion 110 of the wire 141 is narrowed by winding the wire 141. (Second Embodiment) Next, an oil leakage scattering prevention apparatus 200 according to a second embodiment of the present invention will be described with reference to FIGS.
Will be described with reference to. The second embodiment also corresponds to claims 1 to 4. Further, the second embodiment differs from the above-described first embodiment in the structure of the holding means for folding and storing the outer cover 110. Therefore, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As described above, in the first embodiment, E
When the RS 30 is inoperative, the extra portion (slack) of the outer cover 110 is folded and stored in the storage bag 130, and is further fixed by the mounting band 130. In the second embodiment, , Simply by using an elastic storage band (for example, a spring band) 230 directly in the oil tank 12
0 is pressed against the outer peripheral surface (FIGS. 19 and 20).

Oil leakage scattering prevention device 2 constructed in this way
00, the outer cover 110 is detached from the storage band 230 when the distance between the arm tip portion 10A and the connected tube 20 is widened by a certain amount or more as the loading arm 10 retracts (FIG. 21). In this way, by using the storage band 230 instead of the storage bag 130 of the first embodiment,
The oil leakage prevention device 200 having a simpler structure is achieved.

The storage band 230 is formed by the outer cover 110.
In addition, a rubber band having elasticity such as a spring band, or a member capable of being artificially pressed like a velcro tape may be used as long as it can hold the oil in the oil tank 120.

[0043]

As described above, according to the first aspect of the invention, the outer cover is provided with the simple structure of the oil leakage prevention device when the ERS is activated and the arm tip is separated. However, since the tip portion of the outer cover is pulled inward while being squeezed, the outer cover can prevent the oil from scattering during the ERS operation, and can reliably prevent the oil from dripping from the outer cover even when the ERS is subsequently separated.

According to the second aspect of the present invention, the motor can be used to wind up the wire inserted through the tip of the outer cover, and the tip of the outer cover can be squeezed and pulled inward. Can be reliably prevented from dripping.
Further, according to the invention of claim 3, it is possible to reliably prevent the scattering of oil from between the outer cover and the oil tank. Further, according to the invention of claim 4, since the slack of the outer cover can be fixed to the oil tank when the oil leakage prevention device is inoperative with a simple structure, the slack does not interfere with the cargo handling work, The operability is improved.

[Brief description of drawings]

FIG. 1 is an oil leakage scattering prevention device 10 according to a first embodiment.
It is a side view which shows the structure of 0.

FIG. 2 is a side view showing outer shapes of an outer cover 110 and a storage bag 130 of the oil leakage scattering prevention device 100.

FIG. 3 is a side view showing the relationship between the tip end portion 10A of the loading arm 10 and the connected pipe 20 when the pipes are separated.

4 is a perspective view showing how the storage bag 130 is attached to the oil tank 120 using the attachment band 131. FIG.

5 is a partially enlarged cross-sectional view showing a state where the outer cover 110 is stored in the storage bag 130. FIG.

FIG. 6 is an explanatory diagram showing a mounting portion between an outer cover 110 and an oil tank 120.

7 is an explanatory view showing the structure of a collar portion 115 of the outer cover 110. FIG.

FIG. 8 is an explanatory diagram showing a state in which the fastener 119A of the outer cover 110 is being closed.

9 is a cross-sectional view taken along the line FF of FIG.

10 is an explanatory diagram showing a connecting portion between an outer cover 110 and an inner cover 150. FIG.

FIG. 11 is a front end portion (drawing port) 110A of the outer cover 110.
FIG.

FIG. 12 is a front end portion (drawing port) 110A of the outer cover 110.
It is explanatory drawing which shows the positional relationship between the hydraulic motor 142 and.

FIG. 13 is an explanatory diagram showing the overall configuration of a loading arm.

FIG. 14 is a side view showing a state of the oil leakage prevention device 100 immediately after separation.

FIG. 15 is a side view showing the oil leakage scattering prevention device 100 immediately after the retracting operation of the loading arm 10 is started.

16 is a side view showing the oil leakage scattering prevention device 100 at the start of winding the wire 141. FIG.

FIG. 17 is a side view showing an oil leakage scattering prevention device 100 during the winding of the wire 141.

FIG. 18 is a side view showing the oil leakage scattering prevention device 100 in a state where the winding of the wire 141 is completed.

FIG. 19 is an oil leakage scattering prevention device 2 according to the second embodiment.
It is a side view which shows the structure of 00.

FIG. 20: Outer cover 11 fixed with a storage band 230
It is a side view which shows 0.

FIG. 21 is a side view showing a state where the outer cover 110 is detached from the storage band 230 by the retracting operation of the loading arm 10.

[Explanation of symbols]

10A arm tip 20 Connected pipe 20A connection 30 Emergency Exit Device (ERS) 31 ERS valve 100,200 oil spill prevention device 110 Outer cover 111 ring (hole, narrowing means) 110A Tip (Drawstring mouth) 120 oil tank 130 storage bag (holding means) 140 Lifting device 141 wire (narrowing means) 142 Hydraulic motor (lifting means) 150 inner cover 230 Storage band (holding means)

Continued Front Page (72) Inventor Hiroshi Ishikawa 1-9-3 Kamatahonmachi, Ota-ku, Tokyo Inside Niigata Iron Works Engineering Center (56) Reference Japanese Patent Laid-Open No. 10-17100 (JP, A) Kaihei 9-249190 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B67D 5/00

Claims (4)

(57) [Claims] 1. An oil leakage scattering prevention device for a loading arm, wherein an emergency release device is interposed between an arm tip portion and a pipe to be connected thereto, wherein the emergency release device is provided on the arm tip end side. An outer cover attached so as to cover the outer cover, a narrowing-down unit provided at a front end of the outer cover, for narrowing down the front-end, and the narrowing-down unit narrowing down the front-end, and narrowing down the outer cover. An oil leakage scattering prevention device for a loading arm, comprising: a pulling-up unit that pulls the tip end portion inward toward the center of the outer cover. 2. The narrowing means comprises a hole formed at a tip portion of the outer cover and a wire inserted through the hole, and the pulling means comprises a motor for winding the wire. The oil leakage scattering prevention device for a loading arm according to claim 1, which is characterized in that. 3. An oil tank is attached to the connecting portion of the pipe to be connected so as to surround it, and an inner cover that closes between the outer cover and the oil tank is attached to an inner surface of the outer cover. The oil leakage scattering prevention device for a loading arm according to claim 1 or 2, characterized in that. 4. The outer cover is formed so that its length is longer than the height of the emergency release device, and the oil tank is provided with a holding means for folding and holding the outer cover. Claim 1 characterized by
4. The oil leakage scattering prevention device for a loading arm according to claim 3.