JPH02551Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is mainly used in transportation systems installed in fluid handling equipment etc. that transport extremely low-temperature liquefied gases such as LNG (liquefied natural gas) and LPG (liquefied propane gas). This invention relates to an emergency pipe disconnection device.

[Prior art]

For example, the fluid handling equipment used to unload oil from an oil tanker docked at a sea berth to an onshore storage tank, or even to load oil from a storage tank onto an oil tanker, may be affected by strong winds, waves, etc. If the movement of an oil tanker becomes large, if left unchecked, the transport pipe will break and cause major damage. Therefore, an emergency disconnection device is installed on the transport pipe, and the emergency disconnection device is activated to disconnect the transport pipe. to prevent its destruction.

The above-mentioned emergency disconnection device includes a clamping mechanism in which a plurality of clamps that clamp the mutually joined flanges of two transport pipes are connected in a C-shape by a connecting rod, and one end and the other end of this clamping mechanism are connected. There is a known device that includes a fastening mechanism that is releasably fastened, and in an emergency, the fastening mechanism is activated to open the clamping mechanism and release the clamp from clamping the flange. (Japanese Unexamined Patent Publication No. 55-97590).

[Problem that the invention attempts to solve]

However, with the configuration of the emergency disconnection device described above, when the liquid to be transported is an extremely low-temperature liquefied gas such as LPG, or when the outside temperature drops below the freezing point, even if the clamping mechanism is opened, the flange or clamp The clamp cannot be removed from the flange due to ice adhering to the area, resulting in a situation where the transport pipe is not cut off as planned.

This idea solves the problems mentioned above. Even if the clamp is stuck to the flange with ice, the clamp can be forcibly removed from the flange and the transport pipes can be separated properly. It is an object of the present invention to provide an emergency disconnection device for a fluid cargo handling device or the like, which is capable of attaching a clamping mechanism to a flange and can be fastened without any trouble by a fastening mechanism.

[Means for solving problems]

In order to achieve the above object, this invention includes a clamping mechanism in which a plurality of clamps that clamp flanges joined to each other are connected in a C-shape by a connecting member, and a clamping mechanism attached to this clamping mechanism. In an emergency disconnection device for a fluid cargo handling device, etc., which is equipped with a fastening mechanism that releasably fastens one end and the other end, the clamping mechanism is clamped by pressing the flange with a pressing member when the clamping mechanism opens the clamping mechanism. The structure includes a separation cylinder that forcibly separates the flange from the flange.

[Effect]

In a state where the plurality of clamps of the clamping mechanism sandwich two flanges joined to each other and connect the flanges together, and the fastening mechanism fastens one end and the other end of the clamping mechanism, disconnection is performed. When the fastening mechanism is activated by a command, one end and the other end of the clamping mechanism are opened, and the clamping of the flange by the clamping mechanism is released. After the fastening mechanism is activated, the separating flange provided on the clamping mechanism is activated, and the pressing member pushes the flange to forcibly separate the clamp from the flange. For this reason, the transport pipes are appropriately separated from each other.

Furthermore, when attaching the clamping mechanism to the flange, the pressing member is moved back from the position of the flange using a separating cylinder. In this way, since the pressure on the flange by the pressing member can be released, there is no problem in fastening one end and the other end of the clamping mechanism using the fastening mechanism.

〔Example〕

The attached drawing shows one embodiment of this invention.
In the figure, numerals 1 and 2 are couplings attached to the ends of the transport pipes 3 and 4. At one end of these coupling rings 1 and 2, the outer surface is provided with a joint surface 5a,
Flanges 5 and 6 are formed with tapered inclined surfaces 5b and 6b that become thinner as they approach the outer periphery on the back side of the joint surfaces 5a and 6a.

In addition, 7 is a clamping mechanism, which has multiple (5 in the figure) clamps 8, 9, 10, 11, 1.
2 and a plurality (four) of connecting members 13. The clamps 8, 9, and 11 have the same structure, and the above-mentioned flanges 5, which are in a joined state, are attached to their inner peripheral surfaces.
It has V-shaped clamping grooves 8a, 9a, 11a that match the inclined surfaces 5b, 6b of No. 6, and split grooves 8b, 9b, 11b and through holes 8c, 9 at both ends of the outer peripheral surface.
protrusions 8d, 9d, 11d on which c, 11c are formed
has. The clamp 10 has a clamping groove 1 on its inner peripheral surface that matches the inclined surfaces 5b and 6b of the flanges 5 and 6.
0a, and protrusions 10d in which split grooves 10b and through holes 10c are formed at both ends of the outer circumferential surface, and a clamping hole 10e for the separation cylinder 14 is formed in the central portion. Further, the other clamp 12 has a clamping groove 12a similar to the above on its inner circumferential surface, and a protrusion 12 on one end of its outer circumferential surface that also has a split groove 12b and a through hole 12c similar to the above.
d is provided protrudingly, and a dividing groove 12e is provided on the other side of the outer peripheral surface.
A protrusion 12g in which a small hole 12f is formed protrudes.

The connecting member 13 is made of a metal rod, and the through holes 8c, 9c, 10c, 11c, A connecting pin 15 is inserted from 12c to connect the clamps 8 to 12 together to form the clamping mechanism 7.

The above-mentioned clamping mechanism 7 includes a clamp 9,
Link 1 with one end pivotally supported by 12 connecting pins 15
The other end of 7 is connected with a pin 18 and attached to the coupling ring 1 in a C-shape.

Furthermore, 20 is a fastening mechanism. This fastening mechanism 20 includes an eye bolt 21 and an opening cylinder 2.
It is mainly based on 2. The eye bolt 21 has its root end fixed to the outer protrusion 8d of the clamp 8 and the pin 2
3, it is rotatably attached. This eye bolt 21 has a projection 12g of the clamp 12.
A locking lug 24 that is locked to a locking edge 12h formed on the eye bolt 21 is loosely fitted to be movable in the axial direction of the eye bolt 21, and a tightening nut 25 that presses the locking lug 24 to the locking edge 12h, and a protrusion 2
A lanyard nut 27 having a number 6 is screwed on. Further, the opening cylinder 22 is connected to the clamp 12.
It is rotatably attached to a bracket 28 fixed to the protrusion 12d of the clamp 12 by a mounting shaft 29, and has a pusher 31 on the tip of the piston rod 30 for pressing the protrusion 26, and is used to lock the protrusion 12g of the clamp 12. From the state in which the locking lug 24 is locked to the edge 12h by tightening with the tightening nut 25, the opening cylinder 22 is operated to release the piston rod 3.
When 0 is extended, the eye bolt 21 is attached to the stop pin 2.
3 as a fulcrum, and cut the shear pin 32, which was inserted into the small hole 12f of the protrusion 12g of the clamp 12 to prevent the eyebolt 21 from freely separating from the split groove 12e, and cut the shear pin 32 as shown in FIG. It comes off from the protrusion 12g of the clamp 12 and opens the clamping mechanism 7 as shown in FIG.

A rotation regulating member 35 is pivotally supported on the stop pin 23 . The rotation regulating member 35 is pivotally supported by the stop pin 23 with one end 35a disposed on the rotation surface of the eye bolt 21 and the other end 35b disposed in the center of the clamp 8. , the eyebolt 21 rotated about the stop pin 23 by the opening cylinder 22 is brought into contact with one end 35a, and the other end 35b is brought into contact with the clamp 8. It is configured to restrict excessive rotation. Therefore, after the rotation of the eye bolt 21 is restricted by the rotation restriction member 35, the piston rod 3 is restricted by the opening cylinder 22.
An extension force of 0 causes the clamps 8, 12 to be moved to the flanges 5,
It acts to separate it from 6.

The separating cylinder 14 installed in the mounting hole 10e of the clamp 10 is equipped with a pressing member 34 at the tip of its piston rod 33 for pressing the flanges 5 and 6, and after the opening cylinder 22 is activated, the piston rod 33 is extended and clamped. 10 can be separated directly from the flanges 5, 6, and other clamps can be separated from the flanges 5, 6 indirectly via the connecting rod 13.

Note that the locking edge 12h formed on the protrusion 12g of the clamp 12 and the locking lug 2 in contact with the locking edge 12h
The surface No. 4 is formed as a circular arc surface centered on the locking pin 23, but the distance from the locking pin 23 on the inside of the locking edge 12h (the side closer to the bottom of the clamping groove 12a) is defined as the distance from the outside. The distance between the locking pins 23 is a little smaller, and the locking lug 24 is connected to the locking edge 12 with a spring.
It can also be carried out by making it press into contact with h. In this case, the shear pin 32 is unnecessary,
When the piston rod 30 is extended, the locking lug 24 moves toward the protrusion 26 against the elasticity of the spring and comes to be disengaged from the locking edge 12h. Additionally, the eyebolt 21 can be extended to the right of the stop pin 23 in FIG. 1 to serve as a stopper, or a stopper pin can be attached to the protrusion 8d of the clamp 8 to which the stop pin 23 is attached to replace it with a rotation regulating member. You can also do it. The release cylinder 22 and the separation cylinder 14 are sequence-controlled, and after the release cylinder 22 is activated, the separation cylinder 14 is activated.
is starting to work.

Next, the operation of the emergency disconnection device of this invention will be explained.

FIG. 1 shows the state in which the flanges 5 and 6 of the emergency disconnection device are connected. In this state, the tightening nut 25 holds the locking lug 24 in the clamp 1.
2, and pull the eye bolt 21 to attach each clamp to the flanges 5 and 6.
The chassis pin 32 is firmly fitted into the split groove 1.
Since the eye bolt 21 is prevented from being pulled out from the eye bolt 2e, the joint state of the flanges 5 and 6 is maintained stably as it is.

If it becomes necessary to separate the flanges 5 and 6 for some reason, the opening cylinder 22 is activated to extend the piston rod 30. As a result, the eye bolt 21 rotates about the stop pin 23 to remove the locking lug 24 from the locking edge 12h. At this time, the shear pin 32 is cut. The piston rod 30 extends further, the eye bolt 21 touches one end 35a of the rotation restriction member 35, and the other end 35b of the rotation restriction member 35 touches the clamp 8.
When the eye bolt 21 comes into contact with the eye bolt 21, the rotation of the eye bolt 21 is stopped and the two clamps 8 and 12 move away from each other, thereby reliably releasing the clamping between the flanges 5 and 6.
Once this is done, the separating cylinder 14 is actuated to separate the clamp 10 from the flanges 5,6. Clamp 8 by the two cylinders 14 and 22,
The separating action of the clamps 10 and 12 is transmitted to the other two clamps 9 and 11 via the connecting member 13, and these clamps 9 and 11 also release the clamping of the flanges 5 and 6. In this way, the clamps are forcibly released by the cylinders 14 and 22, so even if ice is attached to the clamps or the flanges, the flanges 5 and 6 can be reliably separated and the transport pipes can be separated from each other. Can be done.

In the above, since the clamping mechanism 7 is attached to the mounting rod 16 of the coupling ring 1 via the link 17, it will not fall downward in the open state.

To attach the emergency disconnection device to the flanges 5, 6, the piston rod 33,
30 and loosen the tightening bolt 25 to lock the locking lug 24 to the locking edge 12h, then tighten the tightening bolt 25 and open the small hole 12.
Insert the shear pin 32 into f to complete the installation.

[Effect of idea]

As explained above, the emergency disconnection device for a fluid cargo handling device, etc. of this invention consists of a clamping mechanism in which a plurality of clamps that clamp flanges joined to each other are connected in a C-shape by a connecting member, and a clamping mechanism. In an emergency disconnection device for a fluid cargo handling device, etc., which is equipped with a fastening mechanism that is attached to a clamping mechanism and releasably fastens one end of the clamping mechanism to the other end, the clamping mechanism has a flange attached to the clamping mechanism when the clamping mechanism is opened. The structure is equipped with a separation cylinder that forcibly separates the clamp from the flange by pushing it with a pressing member, so even if the clamp is stuck to the flange with ice, the separating cylinder can be activated and the pressing member can By pushing the flange, the clamp can be forcibly separated from the flange, and the transport pipes can be properly separated from each other.

Furthermore, since the pressing member can be moved back from the position of the flange using the separating cylinder, the pressing member can release the pressing of the flange, and the clamping mechanism can be attached to the flange. The end can be fastened without any problem.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a front view of an emergency disconnection device in a fluid cargo handling device, etc. according to this invention, Figure 2 is a sectional view taken along the - line of Figure 1 showing the relationship between the clamp and flange, etc., and Figure 3 is a partial view of the connecting member. It is. 5, 6... flange, 7... clamping mechanism, 8,
9, 10, 11, 12... Clamp, 12h...
Locking edge, 13... Connection member, 14... Separation cylinder, 20... Fastening mechanism, 21... Eye bolt,
22... Opening cylinder, 24... Locking lug, 34... Pressing member, 35... Rotation regulating member.

Claims (1)

[Claims for Utility Model Registration] (1) A clamping mechanism in which a plurality of clamps that clamp flanges joined to each other are connected in a C-shape by a connecting member, and one end of the clamping mechanism attached to this clamping mechanism. In an emergency disconnection device for a fluid cargo handling device, etc., which is equipped with a fastening mechanism that releasably fastens the clamping mechanism and the other end, the clamping mechanism is configured to press the flange with a pressing member to move the clamp to the flange when the clamping mechanism opens the clamping mechanism. 1. An emergency disconnection device for a fluid cargo handling device, etc., characterized in that a separation cylinder is provided for forcibly separating the cargo from the cargo. (2) The fastening mechanism has a locking lug that is locked to a locking edge formed at one end of the clamping mechanism, and an eyebolt that is rotatably attached to the other end of the clamping mechanism, and the eyebolt is rotated. Claim 1 of the utility model registration claim characterized in that the eye bolt is provided with a release cylinder that is moved to release the locking lug from the locking edge, and a rotation restriction member that prevents excessive rotation of the eye bolt. emergency disconnection device for fluid handling equipment, etc.