JPH0144600B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called loading arm, a fluid cargo handling device used for loading and unloading fluids onto tankers, barges, etc., and particularly relates to an emergency release device.

As is well known, this type of fluid cargo handling equipment includes, for example, a riser fixed to a quay, an inboard arm connected to the tip of the riser so that it can rotate horizontally and vertically, and an inboard arm that can rotate vertically at the tip of the inboard arm. It consists of an outboard arm that is freely connected, and a coupler that is vertically pivotably connected to the tip of the outboard arm and is detachably connected to, for example, a manifold on a ship.

When using such fluid cargo handling equipment to unload or load oil, etc., a vessel such as an oil tanker may be affected by strong winds or waves and move away from the quay beyond the safe movable range of the fluid cargo handling equipment. When such a situation occurs, it is necessary to disconnect the coupler provided in the middle of the fluid cargo handling line to separate the fluid cargo handling equipment on the quay from the ship. Therefore, an emergency release device is usually provided in the middle of the above-mentioned fluid cargo handling line, specifically between the outboard arm and the manifold on the ship side, to prevent unexpected accidents.

Conventionally, this type of automatic disconnection device uses electrical means such as a limit switch to detect when a ship has moved or is at risk of moving beyond the safe movement range of the fluid handling equipment. The hydraulic pressure generated by the hydraulic pump was controlled by a signal using a solenoid valve, etc., and the hydraulic pressure was applied to a disconnection coupler, which operated the disconnection coupler, thereby separating the ship and the fluid cargo handling equipment.

The above method requires electric/hydraulic control, which is complicated and expensive, and requires specialized skills for maintenance and management. In addition, since this type of fluid handling equipment is generally used to handle hazardous materials such as oil, the electrical equipment used must have an explosion-proof structure, and maintenance is difficult. becomes.

The present invention has a simple structure, is difficult to break down, and is easy to maintain. An object of the present invention is to provide an emergency disengagement device for a fluid cargo handling device.

For this reason, the present invention consists of a coupler divided into two parts in the direction of the fluid transfer path, a proximal side divided body and a distal side divided body that are combined so that they can be connected and separated from each other, and a clamp that connects both divided bodies to each other. an emergency disconnection coupler comprising a member and a cylinder device that performs an operation to release the connection by the clamp member; and a fluid pressure supply that is attached to the main body of the fluid cargo handling device and supplies fluid pressure to the cylinder device to operate the cylinder device. a cylinder device, two on-off valves provided on each of the two divided bodies, a link mechanism attached to the two divided bodies to interlock the opening and closing operations of the two on-off valves, and the fluid pressure a first lock means for fixing the supply cylinder device in a state in which fluid pressure cannot be supplied; a second lock means for fixing the link mechanism in an open state of the on-off valve; and an included angle between the inboard arm and the outboard arm is a predetermined angle. a first fixing release means provided with a string member that applies a tensile force to cause the first locking means to release its fixation when the angle is above the predetermined angle; A second lock release means is provided with a string member that applies a tensile force to the second lock means to release the fixation of the second lock means prior to release of the fixation of the means.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 8.

In FIG. 1, 1 is a riser fixed to a quay, 2 is an inboard arm connected to the tip of the riser 1 so that it can rotate horizontally and vertically, 3
4 is an outboard arm connected to the tip of the inboard arm 2 so as to be vertically pivotable, and 4 is a coupler connected to the tip of the outboard arm 3 so as to be pivotable vertically. The inboard arm 2 and the outboard arm 3 are each formed into a tubular shape, and a fluid transfer path connected to the connector 4 is formed in the inner cavity of each of the inboard arms 2 and the outboard arm 3 to move fluid in the longitudinal direction of each arm 2, 3. It is configured as follows. Further, a counterweight (not shown) is provided at the base end of each of the inboard arm 2 and outboard arm 3 via beams 2a and 3a, and these arms 2 and 3
It is designed to maintain a balance.

On the other hand, in the figure, 4A and 4B are a proximal side divided body and a distal side divided body which are formed by dividing the coupler 4 into two in the direction of the fluid transfer path and can be connected and separated;
Reference numeral 5 indicates an emergency disconnection coupler consisting of a clamp member 6 that connects the two divided bodies 4A and 4B, and a hydraulic cylinder device 7 that operates to release the connection between the clamp members 6. Reference numeral 8 indicates an outboard arm 3.
A hydraulic supply cylinder device 9 is attached to the outer wall of the coupler 5 and supplies fluid pressure, that is, hydraulic pressure, to the hydraulic cylinder device 7 to operate the hydraulic cylinder device 7 on the coupler 5 side. First locking means for locking the device in such a way that it cannot be locked. 10 is the two divided bodies 4
A link mechanism that interlocks the opening and closing operations of ball valves (not shown) as opening/closing valves mounted on each of A and 4B; 11 is a second locking means for fixing the link mechanism 10 in the open state of the ball valve; 12 is a force that releases the fixation of the first locking means 9 on the hydraulic pressure supply cylinder device 8 side when the included angle between the inboard arm 2 and the outboard arm 3 exceeds a predetermined allowable limit angle θ. The first locking means 9
13 is the included angle θ of both arms 2 and 3.
becomes equal to or greater than the predetermined limit angle, the first
This is means for applying a force to the second locking means 11 to release the fixation of the second locking means 11 on the link mechanism 10 side before the locking means 9 is released.

Here, the base end side divided body 4A of the coupler 4 includes an elbow-shaped first tube portion 14 that is vertically pivotably connected to the tip of the outboard arm 3, and the first tube portion 1.
The ball valve main body 15 is formed by fastening one end of the flange portion 15A to the flange portion 14A provided at the tip of the ball valve body 15. The distal end side divided body 4B has an elbow-shaped second pipe portion 16 and a flange portion 17A at one end thereof fastened to a flange portion 16A of a horizontal swivel joint 16B provided at the base end of the second pipe portion 16. It consists of a ball valve body 17. As shown in FIG. 2, each ball valve body 15, 17 has flange portions 15B, 17B with tapered back surfaces that abut against each other at opposite ends of the flange portions 15A, 17A, respectively. There is.

The clamp member 6 of the emergency disconnection coupler 5 is
Two lower clamp members 6 as shown in FIG.
It is composed of A, 6B and one upper clamp member 6C. The lower clamp members 6A and 6B are rotatably connected to each other via a pin 18, and the lower clamp member 6A and the upper clamp member 6C are rotatably connected to each other via a pin 19. ing. An eye bolt 21 is rotatably connected to the free end of the other lower clamp member 6B via a pin 20, and a lanyard nut 23 having an engaging portion 22 on the outer periphery is attached to the head of the eye bolt 21. Furthermore, a locking lug 25 is provided on the shaft portion of the eyebolt 21 and is positioned and fixed by a locking nut 24. The protrusion 26a of the free end of the upper clamp member 6C has a groove 26 that is open outward.
is formed along the longitudinal direction of the upper clamp member 6C, and the eye bolt 21 is inserted into this groove portion 26.
The proximal portion of the locking lug 25 is fitted, and at this time, the arcuate end surface of the locking lug 25 is fitted into the protrusion 2 of the upper clamp member 6C.
It is adapted to abut and lock on the arcuate rear surface 26b of the holder 6a.

And each of the clamp members 6A, 6B, 6C
As shown in FIG. 2, each has a substantially trapezoidal groove 27 on its inner peripheral surface, and when the eyebolt 21 is fitted into the groove 26 of the upper clamp member 6C as described above, the eye bolt 21 is inserted into the groove 27. Therefore, the ball valve bodies 15, 17 and the flange portions 15B, 17B are held against each other, and the ball valve bodies 15, 17 are held in a connected state. On the other hand, one end of a cylinder bracket 29 is attached to the rear end of the hydraulic cylinder device main body 7B via a pin 28, and the other end of this cylinder bracket 29 is connected to the pin 19. Further, at the tip of the piston rod 7A of the hydraulic cylinder device 7, a rod end 30 is provided with a locking groove 30A into which the engaging portion 22 on the outer periphery of the lanyard nut 23 is inserted and locked.

The hydraulic cylinder device main body 7B includes a support member 31 fastened to its outer periphery, and is suspended and supported on the first pipe portion 14 side of the coupler 4 by a wire rope 32 connected to the support member 31. There is. Moreover, 7a and 7b are oil boards provided in the hydraulic cylinder device main body 7B, respectively.

Next, as shown in FIGS. 4 and 5, the main body 8A of the hydraulic pressure supply cylinder device 8 is placed on the outer wall surface of the outboard arm 3 with its piston rod 8B facing toward the base end of the outboard arm 3. It is swingably supported via a pin 33a by a bracket 33 fixed to. 8a and 8b are oil ports of the hydraulic pressure supply cylinder device 8, and one oil port 8a and the oil port 7a of the hydraulic cylinder device main body 7B on the coupler 5 side are connected via a flexible pipe 36.

The first locking means 9 of the hydraulic pressure supply cylinder device 8 is configured to fix the tip of the piston rod 8B in the contracted state via a first shear pin 34. That is, the first shear pin 34 has its both ends supported by a pair of support plates 35A and 35B that are opposed to each other on the distal end surface of the hydraulic pressure supply cylinder device main body 8A, and the intermediate portion thereof is supported by the piston rod 8B.
It is inserted into a through hole 8C provided in the. The link mechanism 10 includes a first link member 37 that operates the proximal ball valve of the coupler 4, and a second link member 38 that operates the distal ball valve.
and a third link member 39 for linking these link members 37 and 38. 1st
An intermediate portion of the link member 37 is connected to a rotating shaft 40 of a valve body (not shown) that projects from the outer peripheral wall of the ball valve body 15. Second link member 3
One end of the valve body 8 is connected to a rotating shaft 41 of a valve body protruding from the outer circumferential wall of the ball valve body 15 .

Both ends of the third link member 39 are rotatably connected to one end of each of the first and second link members 37 and 38, which are set in parallel.

Note that the connection structure between the second link member 38 and the third link member 39 is similar to that of the third link member 39.
It is configured such that a pin portion 43 provided at the free end of the second link member 38 is inserted into a substantially U-shaped member 42 provided at the connecting end of the second link member 38 and opened downward. 4B, the pin portion 43 comes out from the substantially U-shaped member 42, and the first link member 37 and the second link member 38 are separated.

As shown in FIG. 6, the second locking means 11 that fixes the link mechanism 10 in the open state of the ball valve moves the first link member 37, which is set to the rotational position that opens the ball valve, to the shear pin 44. It is configured to be fixed to the outer wall of the ball valve main body 15 via the ball valve body 15. That is, the second shear pin 44 has one end screwed into the outer wall of the ball valve main body 15, and the other end fitted into the support portion 15C integrally molded into the outer wall of the ball valve main body 15 in a substantially L-shape. , the intermediate portion thereof is inserted into a through hole 37A provided in the first link member 37.

Next, when the included angle θ between the inboard arm 2 and the outboard arm 3 exceeds a predetermined angle, a tensile force is applied to release the fixed state of the first locking means 9 on the hydraulic pressure supply cylinder device 8 side. The first fixing release means 1 includes a wire rope 48, which will be described later, as a string member attached to the first locking means 9.
2, when the inboard arm 2 and outboard arm 3 reach the predetermined angle θ or more, the first
A wire rope 49, which will be described later, is provided as a string member for applying a tensile force to the second locking means 11 to release the fixation of the second locking means 11 on the link mechanism 10 side before the locking means 9 is released. 2 fixing release means 13 are provided.

The configuration of these fixing release means 12 and 13 is as follows.
It is shown in FIGS.

That is, in these figures, reference numeral 45 indicates a first pulley rotatably supported at the pivoting connection between the outboard arm 3 and the first pipe portion 14, and 46 indicates a first pulley rotatably supported at the base end side of the outboard arm 3. second supported
A pulley 47 is a third pulley rotatably supported on the distal end side of the inboard arm 2, opposite to the support side of the pulley 46. and the first pulley 4
5 is provided with a single outer circumferential groove 45A, and the second and third pulleys 46 and 47 are provided with two outer circumferential grooves 46 in parallel.
A, 47A, and 47B are provided, respectively. 48
When the included angle θ between the inboard arm 2 and the outboard arm 3 exceeds a predetermined limit angle,
A wire rope 49 applies a tensile force to the piston rod 8B of the hydraulic supply cylinder device 8 so as to break the shear pin 34, and a wire rope 49 is used to attach the second shear pin to the first link member 37 when the included angle θ exceeds the predetermined angle. 44 is a wire rope that applies a tensile force that causes it to break.

A connector 50 is attached to one end of the wire rope 48, and the connector 50 is rotatably connected to a U-shaped joint 51 provided at the tip of the piston rod 8B of the hydraulic supply cylinder device 8 via a pin 50A. has been done. Also, this wire rope 4
A first stopper member 52 is connected to the other end of 8, and the first stopper member 52 is connected to a spring 53.
It is connected to a bracket 54 fixed to the outer wall of the base end of the inboard arm 2 via. and,
This wire rope 48 is stretched between an outer circumferential groove 46A located inside the second pulley 46 and an outer circumferential groove 47B located outside the third pulley 47. On the other hand, a connector 55 is also attached to one end of the wire rope 49, and this connector 55 is freely rotatable via a pin 57 to a U-shaped joint 56 provided at the free end of the first link member 37. is connected to.

A second stopper member 58 is also connected to the other end of the wire rope 49, and the second stopper member 58 is connected to the bracket 54 via a spring 59.

This wire rope 49 is connected to the first pulley 4
5 outer circumferential groove 45A, second pulley 46 outer circumferential groove 4
6B and the inner outer peripheral groove 47A of the third pulley 47, respectively.

A locking member 60 is fixed to the outer wall of the inboard arm 2 to lock the stopper members 52, 58, and the wire ropes 48, 49
are inserted respectively.

With this configuration, when the included angle θ between the inboard arm 2 and the outboard arm 3 is less than the predetermined limit angle, the springs 53 and 59 expand and contract as the arms 2 and 3 expand and contract, A tensile force that would break the shear pins 34, 44, respectively, is not applied to the piston rod 8A of the hydraulic pressure supply cylinder device 8 and the first link member 37. When the included angle θ of both arms 2 and 3 exceeds a predetermined limit angle, each stopper 52 and 58 is locked to the locking member 60, and the piston rod 8A and the first The link member 37 will be tensioned, and each shear pin 3
4 and 44 are designed to break. In this case, the positions of the respective stoppers 52 and 58 that define the predetermined limit angles of both arms 2 and 3 are adjusted so that the first stopper 52 is closer to the second stopper than the second shear pin 34. Stoppa 58
Adjustment is made so that the position is set far away from the locking member 60.

Next, the operation of the emergency release device in the above fluid cargo handling device will be explained.

As shown in FIG. 1, during normal cargo handling operations of the fluid cargo handling device, the piston rod 8B of the hydraulic supply cylinder device 8 is held in a contracted state, and the piston rod 7A of the hydraulic cylinder device 7 of the emergency disconnection coupler 5 is also held in a contracted state. The ball valve bodies 15 and 17 at the proximal end and the distal end of the coupler 4 are connected to each other by the clamp member 6 of the coupler 5. Further, the first link member 37 in the link mechanism 10 is in a fixed state with both the ball valves on the base side and the tip side open.

Now, in the event of an emergency situation such as a ship being pulled away from the quay due to strong winds or waves during cargo handling operations, or an abnormal change in stagnant water, it is necessary to prevent damage to the fluid cargo handling equipment. Therefore, the fluid cargo handling device that remains connected to the ship is in an open state in which the included angle θ of both arms 2 and 3 exceeds a predetermined limit angle.

In this state, the second stopper 58 is first locked by the locking member 60, and the end of the first link member 37 is pulled upward by the wire rope 49, and the second shear pin is pulled upwardly by the wire rope 49. 44 is broken, the first link member 37 is swung, and the second link member 38 is also swung via the third link member 39.

As a result, the valve body rotating shafts 40 and 41 of both the proximal and distal ball valves are rotated, respectively, and both ball valves are closed.

After a short time, stopper 52
is locked by the locking member 60, and the wire rope 4
9, the tip of the piston rod 8B of the hydraulic pressure supply cylinder device 8 is pulled, and the first shear pin 3
4 is broken, at the same time the piston rod 8B
is expanded. As a result, the oil filled in the cylinder communicating with the oil port 8a of the hydraulic supply cylinder device 8 is pushed out from the oil port 8a, and this oil is transferred to the flexible hose 36.
The oil is supplied into the cylinder body 7B from the oil port 7a of the hydraulic cylinder device 7 of the emergency disconnection coupler 5, and the piston rod 7A is extended by the oil pressure. Therefore, the eye bolt 21 of the coupler 5 is swung from the A position shown by the solid line in FIG. 3 to the B position shown by the chain line, and the eye bolt 21
1 is separated from the groove 26 of the upper clamp member 6C, the locking lug 25 is disengaged from the protrusion 26a of the upper clamp member 6C, and the ball valve body 15,
17 Mutual agreement will be canceled. As a result, the ball valve bodies 15, 17 are separated from each other. In this case, the third link member 39 and the second link member 38 in the link mechanism 10 will be separated.

As a result of the above, the ship side and the fluid handling equipment side are completely separated, and a situation where the fluid handling equipment is extended beyond the permissible rotation range of its arm due to abnormal behavior on the ship side will not occur. First, damage to the fluid cargo handling device is avoided.

Further, according to this configuration, when the ship is pulled away from the quay, after the fluid transfer paths of the coupler 4 side of the fluid cargo handling device and the disconnected portion of the ship's manifold side are cut off, the connection between the coupler 4 side and the manifold is completed. It can be easily separated from the side, and leakage of fluids such as oil from the separated part can be reliably prevented, and safety can be particularly improved for cargo handling equipment that handles LNG and the like.

Furthermore, the device itself can be easily configured by combining the emergency disconnection coupler 5, the link mechanism 10, the hydraulic supply cylinder device 8, the ball valve, the wire ropes 48, 49, etc., and can operate the electrical parts and equipment. Since it does not require a hydraulic power source to operate, the structure is simple, cost-effective, and safe.

In the above embodiment, the hydraulic pressure supply cylinder device 8 was configured to be attached to the outer wall of the outboard arm 3, but since this hydraulic pressure supply cylinder device may have a small capacity, the hydraulic pressure supply cylinder device 8 can be installed as shown in FIG. The cylinder device 8' may be connected to the outer wall of the first tube portion 14 of the coupler 4 via a bracket 61.

As explained above, the present invention operates the cylinder device for disconnecting the coupler through the fluid pressure supply cylinder device by the movement of the inboard arm and the outboard arm themselves, thereby separating the disconnection coupler. , the disconnection coupler can always be operated reliably without malfunction, and damage to cargo handling lines caused by large swings of tankers etc. can be prevented. Furthermore, since the fluid transfer paths on the coupler side and the manifold side are shut off before the coupler is disconnected, it is possible to reliably prevent cargo handling fluid from leaking from the disconnected portion, further improving safety. It is. Furthermore, since no electricity is used, it is possible to completely prevent spark accidents, which can cause major disasters, and it is difficult to break down and easy to maintain.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the fluid cargo handling device according to the present invention, FIG. 2 is a front view showing a disconnection portion of the coupler in the same embodiment, and FIG. 3 is a front view of the emergency disconnection coupler in the same embodiment. A plan view showing the structure, FIG. 4 is a side view of the hydraulic cylinder device part in the same embodiment as above, FIG. 5 is an enlarged view showing the lock part of the same hydraulic cylinder device as above, and FIG. 6 shows the lock part of the link mechanism. An enlarged view, FIG. 7 is a side view showing the stopper part of the wire rope, and FIG. 8 is a front view of the coupler part showing another embodiment of the present invention. 1... riser pipe, 2... inboard arm,
3...Outboard arm, 4...Coupler, 4
A, 4B...Divided body, 5...Emergency disconnection coupler, 8...Hydraulic pressure supply cylinder device, 10...Link mechanism, 9, 11...Lock means, 12, 13...
...Fixing release means, 48, 49...Wire rope.

Claims (1)

[Claims] 1. A riser, an inboard arm connected to the tip of the riser so that it can rotate horizontally and vertically, an outboard arm that is connected to the tip of the inboard arm so it can rotate vertically, and a tip of the outboard arm. A fluid handling device comprising: a coupler vertically rotatably connected to a base end-side divided body which is formed by dividing the coupler into two parts in the direction of the fluid transfer path, and which are combined so as to be able to be connected and separated from each other; an emergency disconnection coupler consisting of a front end side divided body, a clamp member that connects the two divided bodies to each other, and a cylinder device that performs an operation to release the connection by the clamp member; a fluid pressure supply cylinder device that supplies fluid pressure for operation to the cylinder device;
a link mechanism attached to the two divided bodies to interlock the opening and closing operations of the two on-off valves, and a first locking means for fixing the fluid pressure supply cylinder device in a state in which fluid pressure cannot be supplied. a second lock means for fixing the link mechanism in the on-off valve open state; and a second lock means for fixing the link mechanism in the open state of the on-off valve;
a first fixing release means comprising a string member that applies a tensile force to the locking means to release the fixation;
When the two arms reach the predetermined angle or more, the first
A second fixing release means includes a string member that applies a tensile force to the second locking means to release its fixation prior to releasing the fixation of the locking means. Fluid handling equipment.