JPH0121400B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pig type fluid transfer pipe device.

[Conventional technology]

Conventionally, fluid transfer pipe devices using pigs have a structure in which the pig launcher is installed separately on the sea (tanker) side and the pig receiver is installed on the land (base tank) side (Japanese Patent Application Laid-Open No. 52-60425). .

[Problem to be solved by the invention]

By the way, there are three types of pig type fluid transfer pipe devices: one for receiving only, one for shipping only, and one for both receiving and shipping. It was necessary to use a work boat to return the pigs to the pig launcher, which posed problems such as not being able to transport them continuously, but also requiring a lot of effort to return the pigs.

For this reason, the present invention provides a pig-type fluid transfer pipe device mainly used only for receiving in the first invention, a pig-type fluid transfer pipe device mainly used only for shipping in the second invention, and a pig-type fluid transfer pipe device mainly used for both receiving and shipping in the third invention. It is an object of the present invention to solve the above-mentioned problems in the pig-type fluid transfer pipe device. Note that although the terms "only for receiving", "only for shipping", and "for both receiving and shipping" are used, in reality, for example, a device for both receiving and shipping may be used only for receiving fluid or only for shipping, so it is not limited to the above. Needless to say.

[Means to solve the problem]

The first invention and the second invention of the present invention will be described with reference numerals shown in FIG. 1 of this embodiment, and the third invention of the present invention will be explained with reference numerals shown in FIG. 2 of this embodiment. I will explain.

The pig-type fluid transfer pipe device according to the first aspect of the present invention connects the sea-side ends of the first fluid transfer pipe 1 and the second fluid transfer pipe 2, which are arranged in parallel with each other, to a connecting pipe equipped with an opening/closing means Y. Connecting pipe 3 to which device 43 is connected
3, the first fluid transfer pipe 1
A land-based pig launcher 4 is connected to the land side end of the second fluid transfer pipe 2 via an on-off valve 3 for the first fluid transfer pipe, and a second
A displacement fluid pumping means 2 that connects a land-based pig receiver 6 via a fluid transfer pipe opening/closing valve 5 and pumps displacement fluid to the pig launcher 4.
4 is a replacement fluid pipe 26 equipped with an on-off valve 22
A tank opening/closing valve 31 or 1 is connected to the land side end of the second fluid transfer pipe 2.
The gist is to connect the base tanks 14 through the connecting pipes 32 or 13 provided with 1.

Further, the pig fluid transfer pipe device according to the second aspect of the present invention has first fluid transfer pipes 1 arranged in parallel with each other.
and the sea side end of the second fluid transfer pipe 2 are mutually connected by a connecting pipe 33 to which a connecting pipe device 43 equipped with an opening/closing means Y is connected, and the land side end of the first fluid transfer pipe 1 is connected to the sea side end of the first fluid transfer pipe 1. A land-based pig launcher 4 is connected to the end of the first fluid transfer pipe via an on-off valve 3, and a second fluid transfer pipe on-off valve 5 is connected to the land-side end of the second fluid transfer pipe 2. A displacement fluid pipe 26 that is connected to a land-based pig receiver 6 via the displacement fluid pipe 26 and equipped with a displacement fluid pressure feeding means 24 that pumps the displacement fluid to the pig launcher 4;
One end of a communication pipe 19 equipped with a fluid pressure feeding means 17 for pumping fluid is selectively connected via valves 15 and 22, and the other end of the communication pipe 19 is connected to a base tank 10.
The purpose of this is to contact the following persons.

The valves for selectively communicating the communication pipe 19 communicating with the base tank 10 and the replacement fluid pipe 26 with respect to the pig launcher 4 are valves installed in the communication pipe 19 and the replacement fluid pipe 26, respectively. 15 and 22, or a three-way valve provided at the connection point between the communication pipe 19 and the replacement fluid pipe 26.

Furthermore, the pig type fluid transfer pipe device according to the third aspect of the present invention is provided with an opening/closing means 41a for opening and closing the sea side ends of the first fluid transfer pipe 1a and the second fluid transfer pipe 2a which are arranged in parallel with each other. connecting pipe device 43
a is connected to each other by a connecting pipe 40a, and at the land side end of the first fluid transfer pipe 1a,
A land-based pig launcher 4a having a pig receiving function is connected via a first fluid transfer pipe opening/closing valve 3a, and replacement fluid is pumped to the land side end of the second fluid transfer pipe 2a. a displacement fluid pipe 20a comprising means 15a;
The replacement fluid transfer pipe 36a for discharging the replacement fluid in the second fluid transfer pipe 2a is selectively connected via valves 19a, 35a, and the pig launcher 4a
Then, one end of the communication pipe 30a equipped with the fluid pressure feeding means 24a for pumping the fluid is connected to the tank opening/closing valve 29.
A, and the other end of the communication pipe 30a is connected to the base tank 22a. A valve selectively connects the replacement fluid pipe 20a and the replacement fluid transfer pipe 36a to the land side end of the second fluid transfer pipe 2a. The valves 19a and 35a may be interposed between the two, respectively, or the three-way valve may be provided at the connection point between the replacement fluid pipe 20a and the replacement fluid transfer pipe 36a.

[Effect]

In the pig-type fluid transfer pipe device according to the first aspect of the present invention, all the valves, valves, and opening/closing means, that is, the opening/closing means Y of the connecting pipe device 43, the opening/closing valve 3 for the first fluid transfer pipe, and the opening/closing valve 3 for the second fluid transfer pipe. An on-off valve 5, an on-off valve 22 for the replacement fluid pipe 26,
A connecting pipe 32 or 13 that connects to the base tank 14
When the tank opening/closing valve 31 or 11 is closed and the first fluid transfer pipe 1, second fluid transfer pipe 2, connecting pipe 33, and replacement fluid pipe 26 are filled with replacement fluid, the connection is started. When receiving transfer fluid from a tanker or the like via the pipe device 43, communication pipe 33, and second fluid transfer pipe 2, a plurality of pigs G ₁ and G ₂ are loaded into the pig launcher 4, and the replacement fluid pipe 26 is opened and closed. Valve 22, first
The fluid transfer pipe on-off valve 3 and the second fluid transfer pipe on-off valve 5 are opened to operate the displacement fluid pressure feeding means 24. The displacement fluid sent out from the displacement fluid pumping means 24 pushes the plurality of pigs G ₁ and G ₂ loaded in the pig launcher 4 and moves the inside of the first fluid transfer pipe 1 toward the connecting pipe 33 . As the pigs G ₁ and G ₂ move, the displacement fluid in the first fluid transfer pipe 1 and the connecting pipe 33 in front of the pigs G ₁ and G ₂ passes through the second fluid transfer pipe 2 and reaches the pig receiver 6. It is discharged from the pig receiver 6. This discharged displacement fluid is preferably recovered from the viewpoint of effective utilization.

In this way, the first pig _G1 passes through the connection branch point RI of the connection pipe device 43, and the last pig G1
When G ₂ reaches the state before passing through the connection branch point RI of the connection pipe device 43, the first fluid transfer pipe on-off valve 3 is closed, the pigs G ₁ and G ₂ are stopped, and the displacement fluid pumping means 24 is stopped. Stop.

Next, open the opening/closing means Y of the connecting pipe device 43,
Transfer fluid is sent from a tanker or the like through the connecting pipe device 43. As a result, the connecting pipe device 4
The pig _G1 , which had stopped after passing through the connection branch point 3, is pushed by the transfer fluid and moves inside the second fluid transfer pipe 2. As a result, the displacement fluid in front of this pig _G1 is pushed and discharged from the pig receiver 6. In addition, the last pig _G2 before passing through the connection branch point ri of the connection pipe device 43 is connected to the first pig G2.
Since the fluid transfer pipe opening/closing valve 3 is closed, the fluid does not proceed to the connection branch point of the connection pipe device 43. The Big _G1 that has been pushed by the transfer fluid and moved inside the second fluid transfer pipe 2 is collected by the Pig receiver 6, and
Thereafter, the opening/closing valve 31 or 11 of the communication pipe 32 or 13 is opened to receive the fluid to be transferred from the tanker or the like to the base tank 14.

After receiving the transfer fluid, in order to fill the first fluid transfer pipe 1 and the second fluid transfer pipe 2 with the replacement fluid again, close the opening/closing means Y of the connecting pipe device 43 from the above state, and then close the first fluid transfer pipe 1 and the second fluid transfer pipe 2. Open the pipe opening/closing valve 3 and release the restraint of the pig G ₂ in front of the connection branch point of the connection pipe device 43. Next, the displacement fluid pressure sending means 24 is activated to send the displacement fluid to the connecting pipe 3.
The above pig G ₂ , which was stopped within 3, is pushed and the second
The transfer fluid in the fluid transfer pipe 2 is transferred to the communication pipe 32 or 1.
The liquid is recovered to the base tank 14 via the pig G2, and the rear part of the pig _G2 is replaced with the replacement fluid.
When a pig comes near the pig receiver 6, the connecting pipe 32
Alternatively, the on-off valve 31 or 11 of 13 is closed and the pig is collected. When the pig G ₂ is collected by the pig receiver 6, the displacement fluid pumping means 24 is stopped and all valves are closed.

Further, in the pig type fluid transfer pipe device according to the second aspect of the present invention, all the valves and opening/closing means are closed, and the first fluid transfer pipe 1, the second fluid transfer pipe 2, and the connecting pipe 33 are closed. , when loading cargo from a state where the displacement fluid pipe 26 is filled with displacement fluid, the pig G ₁ is attached to the pig launcher 4.
The on-off valve 3 for the first fluid transfer pipe and the second fluid transfer pipe are loaded.
Fluid pressure feeding means 17 that opens the fluid transfer pipe opening/closing valve 5 and pumps the fluid in the base tank 10
A communication pipe 19 equipped with a valve 15 is operated to communicate with the pig launcher 4, and the fluid in the base tank 10 is transferred to the pig launcher 4 by the fluid pressure sending means 17.
send to.

The transfer fluid sent out from the base tank 10 is
Push Pig G ₁ loaded in Pig Launcher 4,
The inside of the first fluid transfer pipe 1 is moved toward the connecting pipe 33. As the pig G ₁ moves, the displacement fluid in the first fluid transfer pipe 1 and the connecting pipe 33 in front of the pig G ₁ passes through the second fluid transfer pipe 2 and reaches the pig receiver 6.
It is discharged from the pig receiver 6. This discharged displacement fluid is preferably recovered from the viewpoint of effective utilization.

In this way, pig G ₁ connects pipe device 4
After passing through the connection branch point 3, the second fluid transfer pipe opening/closing valve 5 is closed to stop the pig _G1 , and at the same time, the opening/closing means Y of the connecting pipe device 43 is opened.
As a result, the transfer pipe from the base tank 10 to the tanker etc. is replaced with the transfer fluid from the replacement fluid.

When the fluid to be transferred in the base tank 10 is to be loaded onto a tanker or the like in the above state, the fluid to be transferred in the base tank 10 is continuously sent to the tanker or the like by the fluid pressure feeding means 17. During loading, the pig _G1 that has passed through the connection branch point ri of the connection pipe device 43 is restricted from moving because the second fluid transfer pipe on-off valve 5 is closed.

After loading the transfer fluid, in order to fill the first fluid transfer pipe 1 and the second fluid transfer pipe 2 with the replacement fluid again, from the above state, close the first fluid transfer pipe opening/closing valve 3 and turn off the fluid. A valve 15 establishes communication between a communication pipe 19 equipped with a pressure feeding means 17 and a pig launcher 4.
Shut off by operation and connect pig G ₂ to pig launcher 4.
Load. Next, the first fluid transfer pipe opening/closing valve 3
When the displacement fluid pipe 26 equipped with the displacement fluid pressure feeding means 24 is opened and communicated with the pig launcher 4 by operating the valve 22, and the displacement fluid pressure feeding means 24 is operated to move the pig G ₂ toward the connecting pipe 33. , the transfer fluid in the first fluid transfer pipe 1 is shipped via the connecting pipe device 43, and the rear part of this pig _G2 is replaced with a replacement fluid. When the pig G ₂ reaches the branch point of the connecting pipe device 43, the opening/closing means Y of the connecting pipe device 43 is closed, and the second fluid is transferred to release the restraint of the pig G ₁ , which was previously stopped in the connecting pipe 33. Open the pipe on-off valve 5.
Then, pig G ₁ , which had stopped in the connecting pipe 33 last time,
and this time's Pig G ₂ are connected to the second fluid transfer pipe 2 one after the other.
will be moved. After both are collected by the pig receiver 6, the displacement fluid pumping means 24 is stopped and all valves are closed.

In addition, when unloading the transfer fluid from a tanker etc. to the base tank 10, in a state where the transfer pipe from the base tank 10 to the tanker etc. has been replaced with the transfer fluid from the replacement fluid, the connection pipe device 43, The transfer fluid may be received into the base tank 10 via the first fluid transfer pipe 1 and the communication pipe 19, and if the first fluid transfer pipe 1 is to be filled with replacement fluid again after unloading, the same procedure as described above can be used. Just do it.

Furthermore, in the pig type fluid transfer pipe device according to the third aspect of the present invention, all the valves and opening/closing means are closed, and the first fluid transfer pipe 1a, the second fluid transfer pipe 2a, and the connecting pipe 40a,
When loading cargo from a state in which the replacement fluid pipe 20a is filled with replacement fluid, the pig is loaded into the pig launcher 4a, the first fluid transfer pipe on-off valve 3a and the tank on-off valve 29a are opened, and the second fluid is removed. A displacement fluid pipe 36a for discharging the replacement fluid in the transfer pipe 2a is communicated with the second fluid transport pipe 2a by operating the valve 35a, and the fluid in the base tank 22a is delivered to the pig launcher 4a by the fluid pressure sending means 24a.

The transfer fluid sent out from the base tank 22a pushes the pig loaded in the pig launcher 4a and moves inside the first fluid transfer pipe 1a toward the connecting pipe 40a. As the pig moves, the replacement fluid in the first fluid transfer pipe 1a and the connecting pipe 40a in front of the pig passes through the second fluid transfer pipe 2a and into the replacement fluid pipe 36.
flows to a.

In this way, the pig connects to the connecting pipe device 43a.
After passing through the connection branch point 3, the displacement fluid conduit 36
A and the second fluid transfer pipe 2a are cut off by operating the valve 35a, the pig is stopped, and the opening/closing means 41a of the connecting pipe device 43a is opened. As a result, the transfer pipe from the base tank 22a to the tanker etc. is replaced with the transfer fluid from the replacement fluid.

When the fluid to be transferred in the base tank 22a is to be loaded onto a tanker or the like in the above state, the fluid to be transferred in the base tank 22a is subsequently sent to the tanker or the like by the fluid pressure feeding means 24a. Note that the movement of the pig is restricted because the second fluid transfer pipe 2a in front of it is in a sealed state.

After loading the transfer fluid, in order to fill the first fluid transfer pipe 1a with the replacement fluid again, from the above state, close the opening/closing means 41a of the connecting pipe device 43a, and close the replacement fluid equipped with the replacement fluid pumping means 15a. The fluid pipe 20a is connected to the second fluid transfer pipe 2a by operating the valve 19a, and the displacement fluid pressure feeding means 15a is operated. As a result, the pig that was previously stopped in the connecting pipe is pushed by the displacement fluid and moves toward the pig launcher 4a. The fluid to be transferred from the first fluid transfer pipe 1a is transferred to the base tank 22a via the communication pipe 30a.
The area behind the pig is replaced with replacement fluid. When the pig reaches the pig launcher 4a, the displacement fluid pumping means 15a is stopped, all valves are closed, and the pig is recovered.

In addition, when unloading the transferred fluid from a tanker etc. to the base tank 22a, the base tank 22a is
In the state where the transfer pipe from the tanker etc. from the tanker etc. has been replaced with the transfer fluid, the connection pipe device 43a, the first fluid transfer pipe 1a,
The fluid to be transferred may be received into the base tank 22a via the connecting pipe 30a, and if the first fluid transfer 1a is to be filled with the replacement fluid again after unloading, the same procedure as described above may be used.

In addition, in the case of automatic control, the moving position of the pig in these inventions is most commonly detected by installing a dedicated detection means such as a pig detector in the transfer pipe and using that detection means. However, it is also possible to know the position of the pig from the flow rate of the transfer fluid or replacement fluid, and to operate it manually. Needless to say, the usage form of the pig-type fluid transfer pipe device of the present invention is not limited to the above, but for example, instead of the method in which a plurality of pigs are fired from a pig launcher at once in the first invention, two pigs are used for displacing fluid. They may be fired sequentially from a pig launcher at appropriate intervals based on the flow rate, etc. Furthermore, various usage forms exist by adding base tank equipment, pig stopping equipment, connecting pipe equipment, etc. to the pig launcher and pig receiver.

〔Example〕

An embodiment of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a first embodiment, particularly relating to the first and second aspects of the present invention. In the figure, A indicates the land side, and B indicates the cargo handling pier side for tankers.
Between B, two main oil pipes 1 and 2 connected on a cargo handling pier are laid (by laying on the seabed). Among these, the land side A pipe end of the first main oil pipe 1 is connected to the pig launcher 4 via the first electric valve 3.
The land side A pipe end of the second main oil pipe 2 is connected to the pig receiver 6 via the second electric valve 5.
It is connected to the. The main oil pipe 1 on the sea side of the first electric valve 3 is branched, and the third electric valve 7 and the fourth electric valve 8 are interposed in series. is connected to. On the other hand, the sea side main oil pipe 2 of the second electric valve 5 is branched, and the fifth electric valve 11 and the sixth electric valve 11 are branched.
It is connected to a second base tank 14 by a second sub oil pipe 13 with an electric valve 12 interposed in series.

The intermediate portion of the pig launcher 4 includes a seventh electric valve 15, an eighth electric valve 16, and an oil feed pump 1.
7. A ninth electric valve 18 is connected to the first base tank 10 by a third sub-oil pipe 19 interposed in series. midway between the third electric valve 7 and the fourth electric valve 8 of the first sub-oil feed pipe 9 and between the seventh electric valve 15 and the eighth electric valve 16 of the third sub-oil feed pipe 19. A bypass oil pipe 21 with a tenth electrically operated valve 20 interposed therebetween connects the pipes in the middle. Similarly, the third
The part of the sub-oil feed pipe 19 between the pig launcher 4 and the seventh electric valve 15 is branched, and is connected to the eleventh electric valve 22, the twelfth electric valve 23, and the water pump 2.
4. It is connected to a water tank 27 via a water pipe 26 with a thirteenth electric valve 25 interposed in series.

On the other hand, the middle portion of the pig receiver 6 is connected to the water tank 27 via a water pipe 30 having a fourteenth electric valve 28 and a fifteenth electric valve 29 interposed in series. Further, a portion of the water pipe 30 between the 14th electric valve 28 and the pig receiver 6 is branched, and the water pipe 30 is connected to the second sub oil pipe 13 via a bypass oil pipe 32 with a 16th electric valve 31 interposed therebetween. The fifth electric valve 11 and the sixth electric valve 12 are connected in the middle.

On the other hand, the piping configuration on the offshore cargo handling pier side B is as follows:
17th and 18th pig stoppers are installed in the connecting pipe 33 connecting the first main oil pipe 1 and the second main oil pipe 2.
electric valves 34 and 35 are interposed in series, a bypass oil pipe 37 is provided as a bypass of the 17th electric valve 34 with a 19th electric valve 36 interposed therebetween, and a 20th electric valve 36 is provided as a bypass of the 18th electric valve 35. A bypass oil feed pipe 39 with an electric valve 38 interposed therebetween and a bypass oil feed pipe 41 with a 21st electric valve 40 interposed therebetween are provided in duplicate. Note that the inner diameter of both the bypass oil pipes 37 and 39 is the same as that of the connecting pipe 3.
3 and the inner diameters of the first and second main oil pipes 1 and 2, and in this embodiment, the area ratio is set to about 0.5 to 5%. Further, the branch point A located on the 17th electric valve 34 side of the bypass oil pipe 41 is the 17th electric valve 34 side of the bypass oil pipe 39.
17th point from branch point RO located on the electric valve 34 side.
It is provided apart from the electric valve 34 on the side closer to it. Further, an electric valve A first oil pipe 42 serving as a connecting pipe device is connected thereto. Similarly, a second oil feed pipe 43 as another connecting pipe device is connected with an electric valve Y interposed between the branch points A and B of the bypass oil feed pipes 39 and 41 of the connecting pipe 33. has been done. In addition, each of the main oil pipes 1, 2 and the connecting pipe 33 has O, P,
First to fifth pig detectors PD ₁ to PD ₅ are provided at positions Q, R, and S, respectively. In addition, what is indicated by G ₁ and G ₂ in the figure are pigs.

The position O of the first pig detector PD ₁ is located between the branch point H of the first sub-oil pipe 9 in the first main oil pipe 1 and the connection part D of the connecting pipe 33, and is located at the branch point O of the first pig detector PD 1. The position P of the second pig detector PD ₂ is an intermediate position between the connecting part N in the connecting pipe 33 and the branch point of the first oil feed pipe 42, and the position P of the second pig detector PD 2 is a position close to the third pig detector PD 2. The position Q of the Tector PD ₃ is located at the bypass oil pipe 3 in the connecting pipe 33.
The position R of the fourth pig detector PD ₄ is located between the branch point C of the connecting pipe 33 and the branch point of the first oil feed pipe 42 and is close to the branch point C. It is located between the branch point RO of the feed pipe 39 and the branch point L of the second oil feed pipe 43, and is close to the branch point RO, and the fifth pig detector PD ₅
The position S is the second position S in the second main oil pipe 2.
It is located between the branch point G of the sub-oil feed pipe 13 and the connecting portion H of the connecting pipe 33, and is close to the branch point G. Note that PD ₆ and PD ₇ are sixth and seventh pig detectors provided near the entrances and exits of the pig receiver 6 and the pig launcher 4, respectively.

Next, the operation (oil feeding and pig recovery) of the above-mentioned pig-type fluid transfer pipe device will be explained.

A case will be described in which oil A is shipped from one oil feed pipe and oil B is received from the other oil feed pipe in a state where fresh water is replaced in the oil feed pipe.

First, insert pig G ₁ into the pig launcher with all valves closed. After inserting the pig G ₁ , in preparation for replacing the fresh water in each main oil pipe 1 and 2 with oil A and oil B, insert the pig G ₁ in front of the 18th electric valve 35.
Perform the operation to stop the main oil feed pipes 1 and 2 with clean water in both main oil pipes 1 and 2. i.e. 1st, 17th, 19th, 1st
18th, 20th, 2nd, 11th, 12th, 13th, 15th, 14th
Each electric valve 3, 34, 36, 35, 38,
5, 22, 23, 25, 29, and 28 are opened to start the water pump 24 and send water to the pig launcher 4, thereby launching the pig _G1 . The launched pig _G1 moves within the main oil pipe 1. Pig G ₁
Fresh water in the first main oil pipe 1 on the front side in the moving direction passes through the second main oil pipe 2, the pig receiver 6, and the water pipe 30, and is collected into the water tank 27. When the pig G ₁ moving in the first main oil pipe 1 passes through the second pig detector PD ₂ (P point) and is detected, a timer built in the second pig detector PD ₂ is activated. As a result, the 18th electric valve 35 is completely closed several minutes later (after the elapse of time from when the pig G ₁ passes through the second pig detector PD ₂ until it reaches the branch point of the second oil feed pipe 43). Therefore, the replacement fresh water in front of the pig G ₁ flows only through the bypass oil pipe 39, and the pig G ₁ moves with its flow speed reduced.
When the pig G ₁ passes through the fourth pig detector PD ₄ and is detected, the pig G ₁ passes through the fourth pig detector PD 4 and is detected.
A time difference is set by a timer corresponding to the time from the position of PD ₄ to reaching branch point RO, and the 20th
The electric valve 38 is closed and the pig _G1 stops at the branch point of the bypass oil pipe 39. Next, in this state, the first electric valve 3, the eleventh electric valve 22, the twelfth electric valve 23, and the thirteenth electric valve 25 are closed, and the pig _G2 is inserted into the pig launcher 4 and the A Work to ship oil.

That is, as a first step, the first, 21st, seventh, and ninth electric valves 3, 40, 15, and 18 are opened, the A oil feed pump 17 is started, and the eighth electric valve 16 is opened. Then, feed oil A into pig launcher 4 and launch pig G ₂ from pig launcher 4. This pig _G2 moves by pushing the replacement fresh water in the main oil pipe 1, and the fresh water is passed through the bypass oil pipe 41, the 21st electric valve 40, the second main oil pipe 2, the pig receiver 6, and the water pipe 30. water tank 2
7 will be collected.

Pig G ₂ moving inside the first main oil pipe 1
When the Pig G 2 passes the second Pig Detector PD ₂ and is detected, the built-in timer of the second Pig Detector PD ₂ starts after a few minutes (after the Pig G ₂ passes the second Pig Detector PD ₂ After the time elapses until reaching the branch point of the oil feed pipe 42), the 17th electric valve 34 is completely closed, and the fresh water in front of the pig G ₂ flows only through the small diameter bypass oil feed pipe 37, and the pig
G ₂ moves with its flow velocity decelerating, and when it passes through the pig detector PD ₃ and is detected, the electric valve X opens, and the 19th and 21st electric valves 36 and 4
0 is the pig _G. Since the third pig detector PD ₃ closes with a time difference corresponding to the time it takes for the third pig detector PD 3 to reach the branching point C from the position of the third pig detector PD ₃ , the pig G ₂ stops at branch point C of the bypass oil pipe 37, and oil A is shipped via the first oil pipe 42. And the third,
Each of the ten electric valves 7, 20 is opened, and the first,
Each seventh electric valve 3, 15 is closed and the normal A
Ready to ship oil.

On the other hand, when receiving oil B to the second base tank 14 via the second oil pipe 43, first
The original electric valve Y of the oil feed pipe 43 and the 18th and 6th
The electric valves 35 and 12 are opened, and B oil is sent from the second oil feed pipe 43. As a result, pig _G1 , which had stopped at branch point B of bypass oil pipe 39,
The oil is pressurized and moves inside the second main oil pipe 2.
The fresh water in the main oil pipe 2 is collected into the water tank 27 via the pig receiver 6 and the water pipe 30. When the pig G ₁ passes through the pig detector PD ₅ and is detected, a timer sets a time lag, and after the pig G ₁ passes the branch point of the sub oil pipe 13 in the second main oil pipe 2, , 6th Pigdaytector
The fifth electric valve 11 is opened at an appropriate time until reaching the installation position of PD ₆ , and the B oil behind the pig G ₁ is sent to the second base tank 14 via the second sub oil pipe 13. It will be done. When the pig G ₁ passes through the pig detector PD ₆ and is detected, the second electric valve 5 closes, and the pig G ₁ passes through the pig receiver 6.
It will be recovered to the normal oil receiving system for B oil.

The status of the equipment after the above operations of shipping oil A and receiving oil B is that oil A is in the first main oil pipe 1, oil B is in the second main oil pipe 2, and pig G ₂ is in the 17th electric It is stopped before the valve 34. In order to replace the inside of both main oil feed pipes 1 and 2 with clean water from this state, first, each of the 3rd, 10th, 9th, 8th, 15th, 5th, and 14th electric valves 7, 20, 18 , 16, 11, 28
After closing, open the first, 17th, 11th, 13th, and 16th electric valves 3, 34, 22, 25, 31,
Start the water pump 24. Next, when the twelfth electric valve 23 is opened, fresh water is force-fed from the water tank 27 to the pig launcher 4.
Pig G ₃ (not shown in the figure) inserted into the main oil pipe 1 is fired and moves inside the first main oil pipe 1, and the A oil that had been retained in the first main oil pipe 1 is transferred to the first main oil pipe 1. The oil is shipped from the oil pipe 42 and the inside of the first main oil pipe 1 is replaced with fresh water. After a _few minutes ₍ Pig G ₃
is from the second pig detector PD ₂ to the first oil pipe 42
After the time elapses until reaching the branch point of ), electric valve X closes, second electric valve 5 opens, and A
The oil shipment has been completed, and the two pigs G ₂ and G ₃ , which had been stopped at the branch point C of the bypass oil feed pipe 37 of the connecting pipe 33, are transferred one after the other to the second main via the connecting pipe 33. The oil pipe 2 will be moved. At this time, the B oil in the second main oil pipe 2 passes through the pig receiver 6, a part of the water pipe 30, the bypass oil pipe 32, and the second sub oil pipe 13 to the second base tank 14. The second main oil pipe 2 behind the pig G ₃ is replaced with fresh water. Thus Pig G ₂ ,
When G ₃ is collected into the pig receiver 6, the insides of both the main oil feed pipes 1 and 2 and the connecting pipe 33 connecting them are completely replaced with fresh water, and the replacement operation is completed. On the other hand, the water pump 24 is stopped upon completion of the process. In addition, by using the water tank 27 as a so-called ballast tank or by providing another ballast tank, it is possible to receive ballast water in the same way instead of receiving oil B, or ship ballast water in the same way instead of shipping oil A. It is also possible. Furthermore, it is also possible to only ship A oil or only receive B oil.

FIG. 2 shows a second embodiment, which mainly relates to the second and third aspects of the present invention. In the figure, Aa indicates the land side as in the case of the first embodiment, and Ba indicates the cargo handling pier side for tanker berthing, and both Aa and Ba are connected on the cargo handling pier. Two main oil pipes 1a,
2a has been laid (by submarine laying). The land side Aa pipe end of the first main oil pipe 1a is connected to the pig launcher 4a via the first electric valve 3a.
The pipe end of the second main oil pipe 2a is connected to the second main oil pipe 2a.
It is connected to a pig receiver 6a via an electric valve 5a. The sea sides of the first and second electric valves 3a and 5a of the two main oil transmission pipes 1a and 2a are branched to form a first sub-transport pipe with third and fourth electric valves 7a and 8a interposed in series. 9a. The central portion of the pig launcher 4a is connected to a water tank 13a by a first water pipe 12a with fifth and sixth electric valves 10a and 11a interposed in series. The water supply end of the water tank 13a is connected to the seventh electric valve 14a and the water supply pump 1.
5a, eighth and ninth electric valves 16a and 17a are connected to the first water pipe 12a between the fifth electric valve 10a and the pig launcher 4a by a second water pipe 18a with intervening serially connected electric valves 16a and 17a, respectively. There is. Further, the eighth and ninth electric valves 16a,
The second water pipe 18a located between 17a and 17a is branched in the middle and connected to the pig receiver 6 by a third water pipe 20a with a tenth electric valve 19a interposed therebetween.
It is connected to the central part of a. The third and fourth electric valves 7a and 8a of the first sub oil pipe 9a are branched in the middle, and include an eleventh electric valve 21a, a base tank 22a, a twelfth electric valve 23a, an oil pump 24a, 13th and 14th electric valves 25a, 2
6a are connected to the pig receiver 6a side of the third water pipe 20a through second sub-oil pipes 27a which are interposed in series. The first sub oil feed pipe 9a is branched midway between the third electric valve 7a and the branch point of the second sub oil feed pipe 27a.
15 and 16th electric valves 28a and 29a are interposed in series, and the second sub-oil pipe 30a
The 13th and 14th electric valves 2 of the sub oil feed pipe 27a
5a and 26a. Further, the middle of the third sub oil pipe 30a between the fifteenth and sixteenth electric valves 28a and 29a is branched and connected to the connecting end of the pig launcher 4a of the first water pipe 12a, and The 16th electric valve 29a of the oil feed pipe 30a and the second sub oil feed pipe 27
A, a first bypass 32a with a seventeenth electric valve 31a interposed between the branch point of the third sub-oil pipe 30a in the first sub-oil pipe 9a and the second sub-oil pipe It is connected to the branch point of 27a. Furthermore, the pig receiver 6a and the tenth electric valve 19 in the third water pipe 20a are
A midway between the branch point of the second sub oil feed pipe 27a in the first sub oil feed pipe 9a and the fourth electric valve is connected by a second bypass 34a with an eighteenth electric valve 33a interposed between It is connected in the middle with 7a. Further, the first water pipe 12a is branched in the middle of the fifth and sixth electric valves 10a, 11a, and a third bypass 36a with a nineteenth electric valve 35a interposed between the third water pipe 20a
It is connected midway between the tenth electric valve 19a and the branch point of the second bypass 34a.
The first sub-oil pipe 9a between the branch point of the second bypass 34a and the branch point of the second sub-oil pipe 27a is connected to a fourth bypass 38a with a 20th electric valve 37a interposed therebetween. Therefore, the fourteenth electric valve 26a of the second sub-oil pipe 27a is connected midway between the branch point of the third sub-oil pipe 30a.

On the other hand, the cargo handling pier Ba side of both the main oil transmission pipes 1a and 2a are connected by a connecting pipe 40a with a 21st electric valve 39a as a pig stopper interposed therebetween. The 22nd and 23rd electric valves 4 are located on both sides of the valve 39a.
1a and 42a are independently interposed between the first and second oil pipes 43a and 44 as connection pipe devices, respectively.
a are connected. Further, a fifth bypass 46a with a 24th electric valve 45a interposed in the connecting pipe 40a on both sides of the 21st electric valve 39a.
are connected. In addition, both the main oil pipes 1
Oa, Pa...Ta shown in a, 2a and connecting pipe 40a
There are 1st to 6th pig detectors in 6 locations.
PD ₁ , PD ₂ to _{PD 6} are each attached.
The installation position Oa of the first pig detector PD ₁ is as follows:
The first sub oil pipe 9 in the first main oil pipe 1a
This is the position on the pier side near the branch point L in a, and the installation position Pa of the second pig detector PD ₂ is on the connecting pipe 4.
This is the intermediate position between the connection point 0a with the first main oil pipe 1a and the branch point 43a of the first oil pipe 43a, and the installation position of the third pig detector PD _3.
Qa is the first oil feed pipe 43a in the connecting pipe 40a
It is an intermediate position between the branch point L and the branch point WO located on the connecting part N side of the fifth bypass 46a,
The installation position Ra of the fourth pig detector PD ₄ is located between the branch point wa of the second oil feed pipe 44a in the connecting pipe 40a and the branch point wa of the second oil feed pipe of the fifth bypass 46a. The installation position Sa of the fifth pig detector PD ₅ is between the branch point W of the second oil feed pipe 44a and the connecting portion Y of the second main oil feed pipe in the connecting pipe 40a. Moreover, the installation position of the sixth pig detector PD ₆ is a position on the cargo handling pier side near the branch point ta of the first sub oil pipe 9a in the second main oil pipe 2a. Note that PD ₇ and PD ₈ are seventh and eighth pig detectors provided near the exits of the pig launcher 4a and the pig receiver 6a, respectively.

Next, the operation of the second embodiment will be explained. First, a case will be described in which oil is shipped from one oil pipe after fresh water has been replaced in the oil pipe.

Pig launcher 4 with all electric valves closed
Insert pig _G1 into a. After inserting the pig G ₁ , perform an operation to replace the fresh water in the main oil pipe 1a with oil. That is, the 1st, 21st, 24th, 2nd, 16th, 19th,
12th, 6th electric valves 3a, 39a, 45a,
5a, 29a, 35a, 23a, and 11a are open. Next, the oil feed pump 24a is activated and the electric valve 25a is opened to send oil from the base tank 22a to the pig launcher 4a through the second sub-oil feed pipe 27a and the third sub-oil feed pipe 30a. When hydraulic pressure is applied to pig G ₁ , pig G ₁ moves and the first
The fresh water in the main oil pipe 1a is supplied to the connecting pipe 40a, the second main oil pipe 2a, the pig receiver 6a, and the third
The water is sent to the water tank 13a through the bypass 36a. On the other hand, when the pig G ₁ moved by oil passes through the pig detector PD ₂ and is detected, the 21st electric valve 39a is closed several minutes later, and the oil flows only from the fifth bypass 46a where the electric valve 45a is located. Flow pig G ₁ moves with its speed reduced and the pig
When G ₁ passes through the pig detector PD ₃ and is detected, the 24th electric valve 45a is closed, the pig G ₁ stops at the branch point of the fifth bypass 46a, and the first main oil pipe 1a is stopped. The fresh water inside is completely replaced by oil. Also, when Pig G ₁ passes through Pig Detector PD ₃ and is detected, the 22nd electric valve 4
1a is opened, oil is sent out through the first oil feed pipe 43a, the first electric valve 3a is closed, the third and fifteenth electric valves 7a and 28a are opened, and normal oil shipping operation begins. In addition, each pig detector PD ₂ and PD ₃ when the above pig G ₁ stops at a branch point.
The related operations of the electric valves 39a, 45a, and 41a are the same as in the case of stopping the pig _G2 at the branch point C when shipping oil A from the first oil pipe 42 in the first embodiment.

Next, after the oil shipment is completed, the first main oil pipe 1
When replacing the inside of a with fresh water, open the second, third, fifteenth, sixteenth, twelfth, and thirteenth electric valves 5a, 7a, 28a, 29a, 23a, 2 that were opened at the time of oil shipment.
5a is closed, and the pig G ₂ is placed inside the pig launcher 4a.
Insert. Next, the first, 21st, ninth, and seventh electric valves 3a, 39a, 17a, and 14a are opened. In this state, when the water pump 15a is started and the electric valve 16a is opened, the pig launcher 4a
When replacement fresh water is pumped into the tank and water pressure is applied to the pig G ₂ , the pig G ₂ moves, and the first main oil pipe 1a
The oil is shipped via the first oil pipe 43a.
Meanwhile, the rear of Pig G ₂ is being replaced with fresh water. After a few minutes when Pig G ₂ passes through Pig Detector PD ₂ and is detected (Pig G ₂ passes through Pig Detector PD ₂
22nd electric valve 41a (after passing the time until reaching the branching point of the first oil pipe 43a)
is closed, the second electric valve 5a is opened, and the pig _G1 that was stopped in the connecting pipe 40a last time and the current pig
G ₂ moves through the main oil pipe 2a one after the other, and both are collected into the pig receiver 6a, the insides of both main oil pipes 1a, 2a and the connecting pipe 40a are replaced with fresh water, and the water pump 15a is stopped. All clean water replacement work has been completed. Then, all electric valves are closed and the entire work is completed. Also, the second oil pipe 44a
When shipping oil from the first oil pipe 43a, insert the pigs G ₁ and G ₂ from the pig receiver 6a and operate each electric valve to perform fresh water replacement and oil shipping in the same way as when shipping oil from the first oil pipe 43a. All work is possible. Note that if the water tank 13a is used as a so-called ballast tank, ballast is transferred from a tanker etc. to the water tank 13a through one of the oil pipes.
It is also possible to ship the oil to the tanker or the like through the other oil pipe while recovering the oil.

Next, a case will be described in which oil is received from one of the oil feed pipes after fresh water has been replaced in the oil feed pipe.

First, insert the pig _G1 into the pig launcher 4a with all electric valves closed. Pig G ₁ after insertion 1st
An operation is performed to replace the clean water in the main oil pipe 1a with oil.

First, the 1st, 21st, 24th, 2nd, 16th, 19th,
12 and the sixth electric valve 3a, 39a, 45
Let a, 5a, 29a, 35a, 23a, and 11a be open. Next, start the oil feed pump 24a, and
The electric valve 25a is opened and oil is sent from the base tank 22a to the pig launcher 4a through the second sub oil pipe 27a and the third sub oil pipe 30a. pig
When oil is added to G ₁ , the pig G ₁ moves, and the fresh water in the first main oil pipe 1a is sent to the water tank 13a through the second main oil pipe 2a, the pig receiver 6a, and the third bypass 36a. . On the other hand, when the pig G ₁ moved by oil passes through the pig detector PD ₂ and is detected, the electric valve 3
9a is closed, and the oil flows only from the fifth bypass 46a where the 24th electric valve 45a is located.The speed of the pig _G1 is reduced and the pig G1 moves, and when the pig _G1 passes through the pig detector _PD3 and is detected. , the 24th electric valve 45a is closed with a time difference set by the timer as described above, and the pig G ₁ is closed by the 5th bypass 46.
It stops at the branch point a, and the fresh water in the first main oil pipe 1a is replaced with oil. And main oil pipe 2
The replacement process is completed with clear water in a.

In this state, in order to receive oil from the first oil feed pipe 43a through the first main oil feed pipe 1a into the base tank 22a, first, the first and second pipes opened as described above are opened.
16. Close the 12th electric valves 3a, 29a, 23a, and then open the 22nd, 3rd, and 11th electric valves 41a, 7a, 21a in preparation for receiving oil. Thereby, oil is sent from the first oil pipe 43a to the sending base oil tank 22a.

When oil reception is completed, the 22nd oil pipe of the first oil pipe 43a
In order to close the electric valve 41a and replace the inside of the first main oil pipe 1a, which was replaced with oil last time, with fresh water,
Perform the following electric valve opening/closing operations.

The 19th electric valve 35a is closed for oil replacement time. Then, the original 7th electric valve 14a of the water tank 13a for fresh water replacement, the 21st electric valve 39a used when the pig G ₁ is stopped, and the 3rd water pipe 20a
The tenth electric valve 19a of the first oil pipe and the fifth electric valve 10a of the first oil pipe are opened. When the preparation for fresh water replacement is completed in this way, the water supply pump 15a is then
the eighth electric valve 16a on the pump discharge side.
is opened and replacement water is sent out from the water tank 13a. This replacement water flows into the connecting pipe 40a through the second water pipe 18a, the third water pipe 20a, the pig receiver 6a, and the second main oil pipe 2a, and the pig G ₁ that was stopped in the connecting pipe 40a in the previous time. , the pig _G1 enters the main oil pipe 1a from the connecting pipe 40a and moves toward the pig launcher 4a,
The oil in the first main oil pipe 1a flows from the branch point
The oil is collected into the base tank 22a through a part of the sub-oil pipe 9a and a part of the second sub-oil pipe 27a, and is replaced with water. When the pig G ₁ passes through the pig detector PD ₁ and is detected, a time lag is set by a timer, and after the pig G ₁ passes through the branch point of the first sub-oil pipe 9a, the seventh pig detector PD 1 detects the pig G 1. At an appropriate time until reaching the installation position of PD ₇ , the third electric valve 7a is closed, the first electric valve 3a is opened, and the pig _G1 is collected by the pig launcher 4a.
The water pump 15a stops, the replacement work is completed,
The entire work is completed by closing all electric valves. Note that when receiving oil into the base tank 22a through the second oil feed pipe 44a, the procedure is the same as when receiving oil from the first oil feed pipe 43a by inserting the pig _G1 from the pig receiver 6a and opening and closing each electric valve. Fresh water replacement and oil receiving work is possible.

Note that in the first and second embodiments described above, the substitution was performed using clean water, but it may also be performed using an inert gas such as N ₂ gas, and is not particularly limited to clean water.

In addition, the 17th electric valve 3 is used as a pig stop device.
3. 18th electric valve 35, 21st electric valve 39a
An example using the first oil pipe 42, 4 was shown.
3a, when a single connecting pipe device such as the second oil feed pipes 43 and 44a is installed in the connecting pipe 33, or when only one of the two oil feed pipes is used, the above-mentioned pig stop device is used. Other valves can perform that function instead.

In addition, pig-type fluid transfer pipe devices can be used only for receiving, exclusively for shipping, or for both receiving and shipping for transferring fluids such as oil.In Japan, most of them are only for receiving, but in any case, the above types are used. Depending on the situation, the location of the base tank equipment relative to the pig launcher and pig receiver changes, and the number of equipment is increased or decreased.

〔Effect of the invention〕

Since this invention has the above-described configuration and operation, it is possible to import and ship fluids such as oil by changing the state of substitution, so that the receiving and shipping work can be carried out extremely efficiently. In addition, since the pig launcher and pig receiver are installed on the land side, there is no need to use a work boat as in the past to transport the pigs collected in the pig receiver to the pig launcher again, which saves labor and allows for continuous fluid transfer. It has excellent effects such as:

[Brief explanation of drawings]

FIG. 1 is a piping configuration diagram showing a first embodiment of the present invention, and FIG. 2 is a piping configuration diagram showing a second embodiment. 1, 1a...main oil transfer pipe (first fluid transfer pipe),
2, 2a... Main oil transfer pipe (second fluid transfer pipe), 3,
3a...first electric valve (opening/closing valve for first fluid transfer pipe), 4,4a...pig launcher, 5...second electric valve (opening/closing valve for second fluid transfer pipe), 6...
Pig receiver, 10...Base tank, 11...5th
Electric valve (opening/closing valve for tank), 13...2nd
Sub oil pipe (connection pipe), 14...Base tank, 1
5... Seventh electric valve (valve), 15a... Water pump (displacing fluid pressure feeding means), 17... Oil feeding pump (fluid pressure feeding means), 19... Third sub oil feeding pipe (connecting pipe), 19
a... 10th electric valve (valve), 20a... 3rd water pipe (replacement fluid pipe), 22... 11th electric valve (on/off valve, valve), 22a... base tank, 24... water pump (replacement fluid pressure feeding means) ), 24a... Oil feed pump (fluid pressure feeding means), 26... Water pipe (pipe for displacement fluid), 29a... 16th electric valve (opening/closing valve for tank), 30a... Third sub oil feed pipe (connecting pipe), 31
...No. 16 electric valve (opening/closing valve for tank), 32
... Bypass pipe (connecting pipe), 33... Connecting pipe, 35a
...19th electric valve (valve), 36a...3rd bypass (replacement fluid pipe), 40a...connecting pipe, 41a...22nd
Electric valve (opening/closing means), 43...second oil pipe (connecting pipe device), 43a...oil pipe (connecting pipe device), Y...electric valve (opening/closing means).

Claims (1)

[Scope of Claims] 1. Sea side ends of a first fluid transfer pipe and a second fluid transfer pipe arranged in parallel to each other are connected to each other by a connecting pipe to which a connecting pipe device equipped with an opening/closing means is connected. connected to the land side end of the first fluid transfer pipe;
A land-based pig launcher is connected via the first fluid transfer pipe on-off valve, and a land-based pig receiver is connected to the land-side end of the second fluid transfer pipe via the second fluid transfer pipe on-off valve. In addition, a displacement fluid pumping means for pumping displacement fluid is connected to the pig launcher by a displacement fluid pipe equipped with an on-off valve, and a tank is connected to the land side end of the second fluid transfer pipe. A pig-type fluid transfer pipe device characterized in that a base tank is connected to a base tank by a communication pipe equipped with an on-off valve. 2. The ends of the first fluid transfer pipe and the second fluid transfer pipe arranged in parallel to each other on the sea side are connected to each other by a connecting pipe to which a connecting pipe device equipped with an opening/closing means is connected, and At the land side end of the fluid transfer pipe,
A land-based pig launcher is connected via the first fluid transfer pipe on-off valve, and a land-based pig receiver is connected to the land-side end of the second fluid transfer pipe via the second fluid transfer pipe on-off valve. At the same time, a displacement fluid pipe equipped with a displacement fluid pumping means for pumping the displacement fluid and one end of a communication pipe equipped with a fluid pumping means for pumping the fluid are selectively connected to the pig launcher via a valve. A pig-type fluid transfer pipe device, characterized in that the other end of the communication pipe is connected to a base tank. 3. The ends of the first fluid transfer pipe and the second fluid transfer pipe arranged in parallel to each other on the sea side are connected to each other by a connecting pipe to which a connecting pipe device equipped with an opening/closing means is connected, and At the land side end of the fluid transfer pipe,
A land-based pig launcher having a pig receiving function is connected via an on-off valve for the first fluid transfer pipe, and a displacement fluid pumping means for pumping replacement fluid is provided at the land side end of the second fluid transfer pipe. The replacement fluid pipe provided with the replacement fluid pipe and the replacement fluid delivery pipe for discharging the replacement fluid in the second fluid transfer pipe are selectively connected via a valve, and the pig launcher is provided with a fluid pumping means for pumping the fluid. A pig-type fluid transfer pipe device, characterized in that one end of the communication pipe is connected via a tank opening/closing valve, and the other end of the communication pipe is connected to a base tank.