JPS62146199A - Residual-liquid treater in emergency separating section for fluid cargo gear, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is mainly provided in an emergency disconnection section of a fluid cargo handling device, and closes a shutoff valve to return the transport pipe to the position immediately before disconnection to prevent leakage to the outside. The present invention relates to a residual liquid processing device that prevents.

[Conventional technology]

For example, when unloading oil from an oil tanker docked at a sea berth to an onshore storage tank, or when loading oil from a storage tank onto an oil tanker, fluid handling equipment may be affected by strong winds, waves, etc. If the movement of the pipe becomes large, if left unchecked, the transport pipe will break and cause major damage. Therefore, the transport pipe is equipped with an emergency disconnection device and a shutoff device, and after the transport pipe is closed by the shutoff device, An emergency disconnection device is activated to disconnect the transport pipe, preventing the leakage of transport fluids such as oil and the destruction of the transport pipe.

[Problem that the invention seeks to solve]

However, as soon as the transport pipe is disconnected, the transport liquid trapped in the connecting part of the transport pipe due to the activation of the shutoff device leaks out, contaminating the ship's equipment, and flows into the sea, contaminating the seawater. Means for Solving Problem 7C] The present invention provides a method for solving two transport pipes, one of which is equipped with a check valve, which is equipped with a cutoff valve, and which is connected so that it can be disconnected freely by an emergency disconnection device. A pressure-injected gas pipe is provided to open into a connecting space surrounded by the two transport pipes and a shutoff valve, and a check valve is provided on a wall constituting the connecting space to transport liquid in the connecting space. The above-mentioned conventional problems have been solved by providing a passage for returning the liquid to other parts of the tube.

[Effect]

If it becomes necessary to disconnect a transport pipe due to severe shaking of the ship, first operate the shutoff valves on each of the two transport pipes to close the transport pipe. A gas such as nitrogen gas is pressurized from the press-fit pipe into the connection space that has been opened.The above operation causes the transport liquid in the connection space to be sent to other parts of the transport pipe through the liquid-feeding passage.In this case, the press-fit pipe The check valve in the liquid passage prevents the return of gas, and the check valve in the liquid passage prevents the liquid to be transported from returning to the connection space.In this way, when the liquid in the connection space has been drained, the emergency disconnection device is activated. Activate to separate the two transport pipes.

〔Example〕

FIG. 1 shows an embodiment of the present invention, in which reference numerals 1 and 2 are both transport pipes, and transport pipe 1 is connected to an above-ground storage tank via a loading arm (not shown) and to other transport pipes. The pipes 2 are each connected to the ship's tanks in a known manner. The connecting pipe 1a constituting the end of the transport pipe 1 is provided with a cutoff valve (butterfly valve) 3 that opens and closes the transport pipe 1 by rotating a valve body 3b by a pivot 3a. Similarly to the above, the connection pipe 2a constituting the section is also provided with a cutoff valve (butterfly valve) 4 that opens and closes the transport pipe 2 by rotating the valve body 4b by the pivot 4a. The above connecting pipe 1a.

Connection flanges Ib, 2b are provided at the ends of 2a, and are configured to be detachably connected by a well-known emergency disconnection device 5.

Further, a gas press-in pipe 7 equipped with a check valve 6 is attached to the connecting pipe 1a, and the inner end thereof is connected to the connecting pipe 1a,
It opens into a connection space K surrounded by the valve body 2a and the valve bodies 3b and 4b. The valve bodies 3b, 4b are provided with a liquid feeding passage 8.9 that communicates the connecting space K with other parts of the transport pipe 1.2, and the liquid feeding passage 8, 9 is provided with a liquid feeding passage 8.9 that communicates the connecting space K with the other part of the transport pipe 1.2. Check valves 10, 11 are provided to allow fluid to flow from the side to the other side of the transport pipe 1.2 and to stop fluid from flowing in the opposite direction.

Note that IC and 20 are valve seats, and 14 is a valve.

Next, the operation of the residual liquid processing device in the emergency disconnection section of the fluid cargo handling device or the like according to the present invention configured as described above will be explained.

If it is necessary to urgently disconnect the transport pipe 1.2 during the transportation of oil or the like, the two shutoff valves 3.4 are operated to close the transport pipe 1.2 as shown in FIG. After closing the transport pipe 1.2, open the valve 14 and pressurize gas such as nitrogen gas or air from the press-in pipe 7 into the connection space surrounded by the connection pipes 1a and 2a and the valve bodies 3b and 4b. . As a result, the transport liquid remaining in the connecting space until then is pushed through the liquid sending passage 8.9 to the other part of the transport pipe 1.2. 1n A return to the 6th day of ablation is prevented. In addition, in the figure, transport pipe 1
．． 2 is drawn next to it, but it is actually the connecting pipe 1 of the transport pipe.
A, 2 The part a is made vertical, and the connection space is made one inch thin so that most of the liquid to be transported inside is discharged from the liquid feeding passages 8 and 9 on the lower side.

When the discharge of the transport liquid is completed, the emergency disconnection device 5 is activated to disconnect the two connecting pipes 1a and 2a.

Note that the above-mentioned operation is normally configured to be automatically performed by a linking means such as a limit switch or a timer.

FIG. 2 shows another embodiment of the present invention. In this example, a liquid feeding passage 15 is provided in the connecting pipe 2a, and a check valve 1 is provided in the connecting pipe 2a.
It is connected to other parts of the transport pipe 2 by a liquid sending vibrator I7 equipped with a pipe 6.

The operation of this residual liquid processing apparatus is exactly the same as that shown in FIG. 1, except that the connecting pipes 1a and 2a are both disposed laterally as shown.

〔Effect of the invention〕

As explained above, in the residual liquid processing device in the emergency disconnection section of the fluid cargo handling device, etc. of the present invention, a gas pressure-injected vibrator is opened into at least one of the two transport pipes into the connection space of the transport pipes. At the same time, a liquid sending passage equipped with a check valve is provided on the connecting pipe and valve body, that is, on the wall of the connecting space, and pressurized gas is sent from the press-fitting tube to remove the remaining transported liquid in the connecting space. Since it is designed to be able to be discharged,
The transport liquid confined in the connection space will not leak out during emergency disconnection of the transport pipe and contaminate the ship's equipment, or flow into the sea and contaminate seawater. In addition, as mentioned above, the residual transport liquid not only does not flow out, but is also returned to the transport pipe, so there is no waste, and there is no need to provide a dedicated tank etc. to receive the residual transport liquid. ,
It has the advantage of being easy to implement and low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the invention, and FIG. 2 is a sectional view showing a second embodiment of the invention. 1.2... Transport pipe, 3, 4... Shutoff valve, 5... Emergency disconnection device, 6. IO...Check valve, 7...Press-fitting vibrator, 8...Liquid feeding passage, K...Connection space.

Claims (1)

[Claims] A connection space surrounded by the two transport pipes and the cutoff valve, in which at least one of two transport pipes equipped with a cutoff valve is removably connected by an emergency disconnection device, and a gas press-in pipe equipped with a check valve is connected to the above two transport pipes and the cutoff valve. The pipe is provided with an opening in the connecting space, and a liquid sending passage including a check valve and returning the transported liquid in the connecting space to another part of the transport pipe is provided on the wall surface constituting the connecting space. Residual liquid processing device in emergency disconnection section of fluid cargo handling equipment, etc.