JPH11148600A - Automatic replacing device for supplied fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic replacing device for supplied fluid, which can clean the inner wall of a pipe effectively. SOLUTION: A closed loop is formed from a supply pipe 1, return pipe 2, and pig station 10. By controlling a supply pipe controlling valve device 6 and a return pipe controlling valve device 7, the fluid accommodated in the first tank 4 or second tank 5 can be supplied to a distribution station 3 selectively via the supply pipe controlling valve device 6 and the supply pipe 1, while the surplus fluid supplied to the distribution station 3 can be returned selectively to the first tank 4 or second tank 5 via the return pipe 2 and the return pipe controlling valve device 7. The fluid pressure is applied to the pig loaded on the pig station 10 and it is introduced to the supply pipe 1 and returned to the pig station 10 via the return pipe 2, and it is possible to wash the inner walls of the supply pipe 1 and return pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning apparatus for cleaning the inside of a pipe for transporting a fluid, and more particularly to an automatic supply fluid exchange apparatus for automatically cleaning an inner wall of a pipe for selectively flowing a plurality of fluids. I do.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Patent Application Laid-Open No. 5-245458, a pipe cleaning apparatus for efficiently and reliably cleaning a main pipe by reciprocating a pig is known. This pipe cleaning device is provided with a launcher for firing a pig at both ends of a main pipe and a catcher for receiving the pig. Compressed gas is supplied from the supply nozzle of the launcher, and the pig reaches the catcher. With the arrival of the pig, the compressed gas is discharged from the exhaust nozzle of the catcher, the pressure drops, and the pig stops. The pressure drop is detected by the pressure sensor of the launcher, and the arrival of the pig at the launcher is detected by the pressure sensor of the catcher. Compressed gas is supplied from the supply nozzle of the catcher based on the detection signal of the pressure sensor of the launcher, and the pig travels on the launcher. The pig is reciprocated by controlling the opening and closing of the electromagnetic valves of the launcher, catcher, main pipe and branch pipe.

[0003]

By the way, in the conventional pipe cleaning apparatus, the pig cannot be efficiently cleaned because the pig is attached or detached at every washing by a one-way method from the launcher to the catcher. .

Accordingly, an object of the present invention is to provide an automatic supply fluid exchange apparatus capable of efficiently cleaning the inner wall of a pipe.

[0005]

SUMMARY OF THE INVENTION An apparatus for automatically changing a supply fluid according to the present invention includes a supply pipe (1) connected to a distribution station (3), and containing and supplying a first fluid and a second fluid, respectively. A first tank (4) comprising at least a first tank (4) and a second tank (5) connected to a pipe (1) and a return pipe (2) connected to a distribution station (3); ) And the second tank (5) are connected to the return pipe (2). This automatic supply fluid exchange device includes a supply pipe (1)
And a supply pipe control valve device (6) connected to the first tank (4) and the second tank (5), and a first tank (4) provided in the return pipe (2). A return pipe control valve device (7) connected to the second tank (5);
A pig station (10) connected between the supply pipe control valve device (6) and the return pipe control valve device (7) and having a pig (70) is provided. The supply pipe (1), the return pipe (2) and the pig station (10) form a closed loop, and the pig (70) can circulate from the pig station through the closed loop. By controlling the supply pipe control valve device (6) and the return pipe control valve device (7), the fluid contained in the first tank (4) and the second tank (5) can be selectively supplied to the supply pipe. The excess fluid supplied to the distribution station (3) can be supplied to the distribution station (3) through the control valve device (6) and the supply pipe (1), and the return pipe (2) and the return pipe control valve device (7). Through the first tank (4) and the second tank (5). A fluid pressure is applied to the pig (70) attached to the pig station (10) and introduced into the supply pipe (1).
The supply pipe (1) and the inner wall of the return pipe (2) can be cleaned by returning to the pig station (10) through the return pipe (2).

The pig (70) is always connected to the pig station (1).
0) and forms a closed loop when the supply pipe (1) and the return pipe (2) need to be cleaned, and the pig (70) is a supply pipe (1) that can circulate through the closed loop from the pig station, a return pipe. (2) and the pig station (10) can be circulated for cleaning. Since the pig (70) does not need to be taken out of the closed loop and circulates through the closed loop, cleaning can be performed efficiently.

In an embodiment of the present invention, the supply pipe control valve device (6) is connected to a first port (61) connected to the supply pipe (1) and to a first tank (4). A second port (62) and a third port connected to the second tank (5).
And a multi-way valve (8) having a fourth port (64) connected to the pig station (10). The second port (62) of the multi-way valve (8) and the first port
A first pump (111) is connected to a first connection pipe (101) that connects the first tank (4). A second pump (112) is connected to a second connection pipe (102) connecting the third port (63) of the multi-way valve (8) and the second tank (5). The return pipe control valve device (7) has a first port (71) connected to the pig station (10) and a second port (72) connected to the first tank (4).
And a third port (7) connected to the second tank (5).
3) and a fourth port (7) connected to the return pipe (2).
And 4) having a multi-way valve (9).

[0008] The supply pipe control valve device (6) includes a supply pipe (1).
A first port (61) connected to the multi-way valve (12)
1) a multi-way valve (8) having a second port (62) connected to the first port (122) and a fourth port (64) connected to the pig station (10); The second port (123) of the valve (121) is connected to the first tank (4), and the fourth port (124) is connected to the second tank (5). A pump (120) is connected between the supply pipe control valve device (6) and the multi-way valve (121). Pig detection devices (8a, 9a) are provided adjacent to the supply pipe control valve device (6) and the return pipe control valve device (7).

The pig station (10) comprises a housing (20) having a chamber (21), the housing (20) having an inlet (22) connected to a pipe end (91), and a housing (21). And a supply port (23) for supplying a fluid to the container. By applying fluid pressure to the chamber (21) from the supply port (23), the pig (70) arranged in the chamber (21) can be pumped from the firing port (51) into the pipe. A tapered portion that decreases in diameter toward the discharge port (51) may be formed in the chamber (21). Chamber (2
The control valve (94) may be closed by the output of the pig detecting device provided adjacent to (1) to prevent the pig (70) from moving.

A sleeve (30) having a through hole (36)
Is fixed to the housing (20), and the sleeve (30) is
A loading port (41) formed at one end of the through hole (36) communicating with the chamber (21), and a firing port (41) connected to the starting end (92) of the pipe and formed at the other end of the through hole (36). 5
1). A tapered portion (40) that reduces in diameter from the loading port (41) to the firing port (51) is formed in the through hole (36), and fluid pressure is applied from the supply port (23) into the chamber (21). Pig (7) arranged in through hole (36)
0) can be pumped into the pipe from the launch port (51).

A straight pipe portion (50) connected on the same axis as the tapered portion (40) and connected to the discharge port (51) is formed in the through hole (36). The sleeve (30) comprises an inner tube (32) extending into the chamber (21) and a housing (2).
0) and a connecting portion (33) extending outside. The sleeve (30) has a flange portion (31) fixed to the housing (20), and the inner tube portion (32) extends from the flange portion (31) into the chamber (21) and has a connection portion (3).
3) extends from the flange portion (31) to the outside of the housing (20). The inside diameter of the loading port (41) is larger than the outside diameter of the skirt (70c) of the pig (70), and
The inner diameter of 1) is slightly smaller than the outer diameter of the skirt (70c) of the pig (70).

The pig station (10) has a housing (20) having a chamber (21), a sleeve (30) fixed to the housing (20) and having a through hole (36), and a coaxial shaft with the sleeve (30). The guide pipe (1) arranged on the line and connected to the end (91) of the pipe.
5). The housing (20) has an inlet (22) connected to the guide tube (15) and a chamber (2).
1) a discharge port (24) for discharging the fluid therein. The sleeve (30) is connected to the loading port (41) formed at one end of the through hole (36) communicating with the chamber (21) and the starting end (92) of the pipe and is connected to the other end of the through hole (36). And a discharge port (51) formed. End of piping (9
Pig (7) sent from 1) through the guide tube (15)
0) is stopped in the through hole (36).

A straight pipe portion (50) connected on the same axis as the tapered portion (40) and connected to the discharge port (51) is formed on the inner surface of the sleeve (30). The sleeve (30) has an inner tube (32) extending into the chamber (21) and a connection (33) extending outside the housing (20). The sleeve (30) has a flange portion (31) fixed to the housing (20), the inner tube portion (32) extends from the flange portion (31) into the chamber (21), and the connecting portion (33) has a flange portion. (31) to housing (20)
Extends outside the The inside diameter of the loading port (41) is pig (70)
The outer diameter of the skirt (70c) of the pig (70) is larger than the outer diameter of the skirt (70c) of the pig (70).
Slightly smaller than the outer diameter of One or more lateral holes (47) are formed in the sleeve (30) to communicate the fluid pressure in the through hole (36) to the outside of the sleeve (30). A horizontal hole (47) is formed near the connecting portion (49) between the tapered portion (40) and the straight pipe portion (50), and the pig (7) in the through hole (36) is formed.
The fluid pressure in front of 0) is the side hole (47) and the chamber (2).
Contact the outlet (24) through 1).

A housing (2) having a chamber (21)
0) and the through hole (3) fixed to the housing (20).
A sleeve (30) having 6) and a guide tube (15) arranged coaxially with the sleeve (30) and connected to the end (91) of the pipe are provided. The housing (20) has an inlet (2) connected to the guide tube (15).
2), a supply port (23) for supplying a fluid into the chamber (21), and a discharge port (24) for discharging the fluid from the chamber (21). The sleeve (30) is connected to the loading port (41) formed at one end of the through hole (36) communicating with the chamber (21) and the starting end (92) of the pipe and is connected to the other end of the through hole (36). And a discharge port (51) formed. A tapered portion (40) having a diameter reduced from the loading port (41) toward the firing port (51) is formed in the through hole (36). The fluid pressure is applied from the supply port (23) into the chamber (21), and the pig (70) arranged in the through hole (36) is pressure-fed from the discharge port (51) into the pipe. End of piping (9
Pig (7) sent from 1) through the guide tube (15)
0) is stopped in the through hole (36). Tapered part (4
A straight pipe portion (50) connected on the same axis as that of (0) and connected to the launch port (51) is formed in the through hole (36). The sleeve (30) has an inner tube (32) extending into the chamber (21) and a connection (33) extending outside the housing (20). The sleeve (30) has a flange portion (31) fixed to the housing (20). The inner tube portion (32) extends from the flange portion (31) into the chamber (21), and the connecting portion (33) is connected to the flange portion (3).
1) extends outside the housing (20). The inside diameter of the loading port (41) is the skirt (70c) of the pig (70)
And the inner diameter of the launch port (51) is pig (7
0) is slightly smaller than the outer diameter of the skirt portion (70c). One or more lateral holes (47) are formed in the sleeve (30) to communicate the fluid pressure in the through hole (36) to the outside of the sleeve (30). Tapered part (40) and straight pipe part (5
0), a lateral hole (47) is formed in the vicinity of the connection (49), and fluid pressure in front of the pig (70) in the through hole (36) is exhausted through the lateral hole (47) and the chamber (21). Call exit (24).

In another embodiment of the present invention, the supply pipe control valve device (6) is composed of two multi-way valves (8) and (130). The return pipe control valve device (7) includes a pig station (140) and a multi-way valve (9). The first port (61) of the multi-way valve (8) is a multi-way valve (130)
Of the multi-way valve (13)
The first port (131) of 0) is connected to the supply pipe 1 via the control valve (210). A control valve (150) is connected between the first port (131) of the multi-way valve (130) and the control valve (210). A control valve (146) is connected between the second port (162) of the multi-way valve (160) and the first port (141) of the pig station (140). The second port (1) of the pig station (140)
42) is the first of the multi-way valve (9) via the control valve (143).
Of the multi-way valve (160)
Between two pig stations (17) between the third port (133) of the multi-way valve (130) and the third port (133) of the multi-way valve (130).
1, 172) are provided in the storage tube (173). At the end of the supply pipe (1) is the first port (1) of the multi-way valve (180).
81) is connected and the second port (182) of the multi-way valve (180) is connected to the distribution station (3) via the control valve (116). The third port (183) of the multi-way valve (180) is connected to the first port (19) of the multi-way valve (190).
1) and connected to the second port (1) of the multi-way valve (190).
92) is connected to the distribution station (3) via a control valve (117). The third port (193) is connected to one end of the return pipe (2), and the other end of the return pipe (2) is connected to the entrance (144) of the pig station (140).
A pig (70) is stored in each of the pig stations (171) and (172).

The two pig stations (171, 172) provided in the storage pipe (173) connected to the supply pipe (1) and the return pipe (2) accommodate two pigs (70). The supply pipe (1) and the return pipe (2) can be sufficiently cleaned by the cleaning liquid contained between the two pigs (70) and the two pigs (70). The pump (120)
The surroundings can also be cleaned.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for automatically changing supply fluid according to the present invention; FIG.

As shown in FIG. 1, the automatic supply fluid exchange apparatus according to the present invention accommodates and supplies a supply pipe 1 connected to a distribution station 3 through an outlet 3a, a first fluid and a second fluid. A first tank 4 and a second tank 5 connected to the pipe 1, a return pipe 2 connected to the distribution station 3 through a return port 3b, a first tank 4 provided in the supply pipe 1 and a second tank 4; And a return pipe control valve device 7 provided on the return pipe 2 and connected to the first tank 4 and the second tank 5.
And a pig station 10 connected between the supply pipe control valve device 6 and the return pipe control valve device 7. The supply pipe 1, the return pipe 2 and the pig station 10 form a closed loop, and the pig 70 can circulate from the pig station through the closed loop.

The supply pipe control valve device 6 is connected to a first port 61 connected to the supply pipe 1, a second port 62 connected to the first tank 4, and to the second tank 5. Third
And a multi-way valve 8 having a fourth port 64 connected to the pig station 10. A first pump 111 is connected to a first connection pipe 101 that connects the second port 62 of the multi-way valve 8 and the first tank 4.
A second pump 112 is connected to a second connection pipe 102 connecting the third port 63 of the multi-way valve 8 and the second tank 5. The return pipe control valve device 7 includes a first port 71 connected to the pig station 10, a second port 72 connected to the first tank 4 via a connection pipe 113, and a connection pipe 114. The multi-way valve 9 has a third port 73 connected to the second tank 5 and a fourth port 74 connected to the return pipe 2. In the distribution station 3, connecting pipes 118 and 119 provided with control valves 116 and 117 are connected to the supply pipe 1 and the return pipe 2, respectively.
The connecting pipe 118 takes out the fluid from the supply pipe 1 to the distribution station 3, and the connecting pipe 119 has a function of returning the excess fluid supplied from the distribution station 3 to the return pipe 2. In the illustrated example, one distribution station 3 is provided, but two or more distribution stations may be provided. The supply pipe 1 and the return pipe 2 forming a closed loop are formed in communication. For this reason, in this specification, the space between the multi-way valve 8 and the connection pipe 118 is referred to as a supply pipe 1, and the space between the connection pipe 119 and the multi-way valve 9 is referred to as a return pipe 2.
18 and 119 are also connected by a supply pipe 1 and a return pipe 2 which form a closed loop. The discharge port 51 of the pig station 10 is connected to the fourth port 6 of the multi-way valve 8 via a control valve 94.
4 and the inlet 22 of the pig station 10 is connected via a control valve 93 to a first port 71 of the multi-way valve 9.

As shown in FIG. 1, a first pig detector 8a is connected to the supply pipe 1 adjacent to the first port 61 of the multiway valve 8.
And a second pig detector 9a is arranged in the return pipe 2 adjacent to the fourth port 74 of the multi-way valve 9. The first pig detecting device 8a and the second pig detecting device 9a are constituted by magnetically sensitive elements such as a reed switch, a Hall element or a magnet diode. Although not shown, a magnet is buried in the rear of the pig 70, and the first pig detector 8a and the second pig detector 9a can detect the magnetism of the magnet in the pig 70 and generate a detection signal.

FIG. 8 shows a pig station used in the present invention.
15 will be described.

As shown in FIG.
Is a housing 20 having a chamber 21 and a sleeve 30 fixed to the housing 20 and having a through hole 36.
And the control valve 9 arranged coaxially with the sleeve 30 and
And a guide tube 15 connected to the tube 91 communicating with the third tube 3. The housing 20 has an inlet 2 connected to a pipe 91.
2, a supply port 23 for supplying a fluid into the chamber 21,
And a discharge port 24 for discharging the fluid in the chamber 21. The sleeve 30 is provided with a through hole 3 communicating with the chamber 21.
6 has a loading port 41 formed at one end and a firing port 51 connected to a pipe 92 communicating with a control valve 94 and formed at the other end of the through hole 36. A tapered portion 40 whose diameter decreases from the loading port 41 toward the firing port 51 is formed in the through hole 36. By applying fluid pressure into the chamber 21 from the supply port 23, the pig 70 disposed in the through hole 36 can be pressure-fed from the discharge port 51 into the pipe. Guide pipe 15 from end 91 of pipe
The pig 70 fed through is stopped in the through hole 36.

A straight pipe portion 50 connected to the same axis as the tapered portion 40 and connected to the discharge port 51 is formed in the through hole 36. The sleeve 30 has an inner tube portion 3 extending into the chamber 21.
2 and a connecting portion 33 extending outside the housing 20. The sleeve 30 includes a flange portion 31 fixed to the housing 20, the inner tube portion 32 extends from the flange portion 31 into the chamber 21, and the connection portion 33 includes the flange portion 31.
From the housing 20 to the outside. The inner diameter of the loading port 41 is larger than the outer diameter of the skirt 70c of the pig 70, and the inner diameter of the firing port 51 is slightly smaller than the outer diameter of the skirt 70c of the pig 70. One or more lateral holes 47 are formed in the sleeve 30 to communicate the fluid pressure in the through hole 36 to the outside of the sleeve 30. A horizontal hole 47 is formed near the connecting portion 49 between the tapered portion 40 and the straight pipe portion 50, and the fluid pressure in front of the pig 70 in the through hole 36 communicates with the discharge port 24 through the horizontal hole 47 and the chamber 21.

Pig station 10 shown in FIGS. 8 and 9
Is a catcher device having both functions of a pig launching device and a pig stopping device which are conventionally separate devices, and is connected to a pipe as shown in FIG.
The pig 70 shown in FIG. 5 is fired and stopped. Pig 70
A substantially spherical head 70a, a rear skirt 70c, an intermediate skirt 70b disposed between the head 70a and the rear skirt 70c, a head 70a, an intermediate skirt 7;
0b and a shaft 77 connecting the rear skirt 70c. The outer diameter of the head 70a of the pig 70 is smaller than the inner diameter of the pipe, and the intermediate skirt 70b and the rear skirt 7
The outer diameter of 0c is slightly larger than the inner diameter of the pipe. Pig 70
Travels inside the pipe, the intermediate skirt portion 70b and the rear skirt portion 70c slide in close contact with the pipe wall, thereby wiping the inside of the pipe.

When the pig 70 is to be fired from the pig station 10, the pig 70 is loaded at the firing position shown in FIGS. 14 and 15, the firing valve 94 and the supply valve 95 shown in FIG. And the outlet valve 96 is closed. In this state, by applying fluid pressure from the supply port 23 into the chamber 21,
The pig 70 arranged in the inside is fed from the firing port 51 into the pipe. Since the pig 70 can be appropriately loaded at the firing position by the tapered portion 40 of the through hole 36, the pig 70 can be reliably fired by preventing leakage of fluid pressure.

When the pig 70 is stopped at the pig station 10, the inlet valve 93 and the outlet valve 96 shown in FIG. 10 are opened, and the outlet valve 94 and the supply valve 95 are closed. The pig 70 sent from the end 91 of the pipe through the guide pipe 15 is stopped in the through hole 36.
As shown in FIG.
The pig 70 enters the through hole 36 of the sleeve 30 through the chamber 21 by the fluid pressure from the end 91 of the pipe, while the fluid in front of the pig 70 is discharged from the outlet 24 of the housing 20. Through hole 36 of pig 70
Entry into the area is carried out smoothly. Even after the rear end of the pig 70 separates from the guide tube 15 as shown in FIG. 12, the pig 70 continues to enter the through-hole 36 by the fluid pressure from the end 91 side of the pipe, but the taper portion 40 of the through-hole 36 Since the diameter decreases from the loading port 41 toward the firing port 51, the tapered portion 40 comes into contact with the skirt portions 70b and 70c of the pig 70 as shown in FIG.
14c and FIG. 14 and FIG.
Stops in the through hole 36. In this way, the pig 70
Can be reliably stopped at a desired position in the through hole 36.

In the through hole 36, a straight pipe portion 50 connected to the same axis as the tapered portion 40 and connected to the discharge port 51 is formed. The straight pipe 50 allows the pig 70 to be stopped and fired more reliably. The sleeve 30 includes an inner tube portion 32 extending into the chamber 21 and a connecting portion 33 extending outside the housing 20. A flange portion 31 fixed to the housing 20 may be provided on the sleeve 30, in which case the inner tube portion 32 extends from the flange portion 31 into the chamber 21, and the connecting portion 33 extends from the flange portion 31 to the outside of the housing 20. . By providing the connecting portion 33, the firing port 51 and the starting end 92 of the pipe can be easily connected.
Maintenance and repair of the sleeve 0 and the sleeve 30 can be performed smoothly. The inner diameter of the loading port 41 is the skirt 70 of the pig 70.
The outer diameter of the launch port 51 is slightly larger than the outer diameter of the skirt portion 70b, 70c of the pig 70. As a result, the pig 70 can be smoothly introduced into the loading port 41, and the skirt portions 70b and 70c of the pig 70 can be stopped near the firing port 51.
The pig 70 can be accurately arranged at the stop position and the firing position, and the stopping operation and the firing operation can be reliably performed.

In this embodiment, one or two or more lateral holes 47 for communicating the fluid pressure in the through hole 36 to the outside of the sleeve 30 are formed in the sleeve 30. Tapered part 40
A horizontal hole 47 is formed in the vicinity of a connecting portion 49 between the hole and the straight pipe portion 50, and fluid pressure in front of the pig 70 in the through hole 36 is set to
7 and the outlet 24 through the chamber 21.
By forming the lateral hole 47, the pig 70 can be formed particularly as shown in FIG.
When traveling at a position as shown in FIG.
Can be released from the lateral hole 47, so that the pig 70 is not pushed back in the direction opposite to the traveling direction, and the pig 7
0 can be stopped as far as possible in the through hole 36. Therefore, when the pig 70 is fired thereafter, the fluid pressure is most efficiently applied to the pig 70, so that the pig 70 can be fired more reliably. The lateral holes 47 are provided, for example, at three locations in the sleeve 30 at 120 ° intervals. The position at which the lateral hole 47 is formed is not limited to the inner tube portion 32 as shown, but may be formed at the connecting portion 33.

The outlet 24 of the housing 20 is provided closer to the firing port 51 than the inlet 22 in order to reliably advance the pig 70 in the traveling direction within the sleeve 30. On the other hand, the supply port 23 of the housing 20 is used to prevent the fluid in the chamber 21 from flowing into the sleeve 30 from the lateral hole 47 and pushing the pig 70 in the opposite direction when the pig 70 is fired.
Is provided in the vicinity of the loading port 41. It should be noted that if the diameter of the lateral hole 47 is too large, the fluid escapes from the lateral hole 47 at the time of firing and cannot be fired. The inner diameter of the lateral hole 47 is preferably 10 to 20% of the minimum inner diameter of the through hole 36. For example, when the minimum inner diameter of the through hole 36 is 23 mm,
Is set to 3 mm.

In this embodiment, the supply port 23 is provided separately from the inlet 22, but the supply port 23 is omitted and the inlet 22 is provided.
The fluid may be supplied into the chamber 21 from. Alternatively, the supply port 23 may be omitted and the fluid may be supplied from the discharge port 24. Further, in this embodiment, the guide pipe 15 is provided as a part of the pig station 10, but a part of a straight pipe provided at the end of the pipe may function as a guide pipe.

In the above configuration, when the pig 70 is operated, the first port 61 and the second port 61 of the supply pipe control valve device 6 are connected to each other.
Port 62 is opened, and the third port 63 and the fourth port 64 are closed. At the same time, the first port 71 and the third port 73 of the return pipe control valve device 7 are closed, and the second port 72 and the fourth port 74 are opened. When the first pump 111 is driven in this state, the first connection pipe 101, the first pump 111, the multi-way valve 8, the supply pipe 1, the return pipe 2, the multi-way valve 9
Then, the first fluid contained in the first tank 4 can be circulated through the connection pipe 113 and returned to the first tank 4. At this time, by opening the control valve 116, the supply can be performed from the supply pipe 1 and the connection pipe 118 to the distribution station 3. Excess first fluid not used in the distribution station 3 can be returned to the first tank 4 through the connecting pipe 119 and the return pipe 2 by opening the control valve 117. At this time, as will be described later, before the first fluid flows through the supply pipe 1 and the return pipe 2, the supply pipe 1 and the return pipe 2 are cleaned by the pig 70.
0 is also filled with the first fluid.

Next, the control valves 116 and 117 are closed,
After washing the pig station 10, the first port 61 and the fourth port 64 of the multi-way valve 8 are opened, and the second port 62 and the third port 63 are closed. In this state, when the pig 70 is fired from the pig station 10 by the pressure of the second fluid supplied to the supply port 23 of the pig station 10, the pig 70 passes through the control valve 94 and the multi-way valve 8. When the pig 70 passes through the multi-way valve 8,
The first pig detector 8a detects the magnetism of the pig 70 and generates a detection signal. When the fluid pressure from the supply port 23 of the pig station 10 is stopped by a pig control device (not shown) according to a detection signal of the first pig detection device 8a, the pig 7
0 stops at a position adjacent to the first pig detection device 8a. Here, the first port 61 and the third port 63 of the multi-way valve 8 are opened, and the second port 62 and the fourth port
Port 64 is closed, and the second pump 112 is driven. As a result, as shown in FIG. 2, when the pig 70 passes through the supply pipe 1 and the return pipe 2, the first fluid in front of the pig 70 is supplied to the supply pipe 1, the return pipe 2, the multi-way valve 9, and the connection pipe 113.
And the second fluid is supplied to the rear of the pig 70 by the second pump 112. Thus, before and after the pig 70, the first fluid and the second fluid
And the supply pipe 1 and the return pipe 2 can flow. When the pig 70 approaches the fourth port 74 of the multi-way valve 9, the second pig detector 9a detects the pig 70.
When the second pig detector 9a generates a detection signal, the pig controller opens the first port 71 and the fourth port 74 of the multi-way valve 9 and closes the second port 72 and the third port 73. At the same time, the control valves 93 and 96 are opened. Thereby, as shown in FIG. 4, the pig 70 is returned to the pig station 10, and thereafter, the first port 71 and the second port 72 of the multi-way valve 9 are closed, and the third port 73 and the fourth port When the port 74 is opened, a circulation circuit of the second fluid is formed as shown in FIG. That is, the second
Flows from the second tank 5 through the second connection pipe 102, the second pump 112, the multi-way valve 8, the supply pipe 1, the return pipe 2, the multi-way valve 9 and the connection pipe 114, and passes through the second tank 5 Is returned to. At this time, a desired amount of the second fluid can be removed from the distribution station 3 by controlling the control valves 116 and 117.

Next, an operation for switching the circulation of the second fluid to the first fluid will be described.

After closing the control valves 116 and 117 and washing the pig station 10, the first port 61 and the fourth port 64 of the multi-way valve 8 are opened, and the second port 62 and the third port 62 are opened. 63 is closed. In this state, when the pig 70 is fired from the pig station 10 by the pressure of the first fluid supplied to the supply port 23 of the pig station 10, the pig 70 is controlled by the control valve 94 and the multi-way valve 8
Pass through. When the pig 70 passes through the multi-way valve 8, the first
The pig detecting device 8a detects the magnetism of the pig 70 and generates a detection signal. According to the detection signal of the first pig detector 8a, the pig controller controls the supply port 2 of the pig station 10.
When the fluid pressure from 3 is stopped, the pig 70 stops at a position adjacent to the first pig detector 8a. Here, the first port 61 and the second port 62 of the multi-way valve 8 are opened, the third port 63 and the fourth port 64 are closed, and the first pump 111 is driven. Thereby, as shown in FIG. 5, when the pig 70 passes through the supply pipe 1 and the return pipe 2, the second fluid in front of the pig 70 is supplied to the supply pipe 1, the return pipe 2, the multi-way valve 9 and the connection pipe 114. , And is returned to the second tank 5, and the first fluid is supplied to the rear of the pig 70 by the first pump 111. In this manner, the supply pipe 1 and the return pipe 2 can flow by separating the second fluid and the first fluid before and after the pig 70. When the pig 70 approaches the fourth port 74 of the multi-way valve 9, the second pig detector 9a detects the pig 70. When the second pig detector 9a generates a detection signal, the pig controller opens the first port 71 and the fourth port 74 of the multi-way valve 9 and closes the second port 72 and the third port 73. At the same time, the control valves 93 and 96 are opened. This allows
As shown in FIG. 7, the pig 70 is returned to the pig station 10 and then the first port 71 and the third
When the port 73 is closed and the second port 72 and the fourth port 74 are opened, a first fluid circulation circuit is configured as shown in FIG. That is, the first fluid is supplied from the first tank 4 to the first connection pipe 101, the first pump 111,
Multi-way valve 8, supply pipe 1, return pipe 2, multi-way valve 9, and connection pipe 1
13 and is returned to the first tank 4. At this time, the distribution station 3 is controlled by the control of the control valves 116 and 117.
From the first fluid.

As described above, the supply pipe control valve device 6 and the return pipe control valve device 7 are controlled to selectively supply the fluid contained in the first tank 4 and the second tank 5 to the supply pipe. Distribution station 3 through control valve 6 and supply line 1
The excess fluid supplied to the distribution station 3 can be selectively returned to the first tank 4 and the second tank 5 through the return pipe 2 and the return pipe control valve device 7. Fluid pressure is applied to the pig 70 mounted on the pig station 10 and introduced into the supply pipe 1. The pig 70 is returned to the pig station 10 through the return pipe 2 to clean the inner walls of the supply pipe 1 and the return pipe 2. Further, the pig 70 is always arranged in the pig station 10, and when the supply pipe 1 and the return pipe 2 need to be cleaned, the supply pipe 1 and the return pipe 2 forming a closed loop are required.
The cleaning can be performed by circulating the pig station 10. Since the pig 70 does not need to be taken out of the closed loop and circulates through the closed loop, it can be efficiently cleaned.

FIGS. 16-22 illustrate a second embodiment of the present invention in which a single pump is used to differentiate between a first fluid and a second fluid and circulate in a closed loop. 16 to 22
Here, the same reference numerals are given to the same portions as those used in the embodiment shown in FIGS. 1 to 7, and the description will be omitted.

As shown in FIG. 16, the first port of the multi-way valve 121 is connected to the second port 62 of the multi-way valve 8 through the pump 120.
Port 122 is connected. The second port 123 of the multiway valve 121 is connected to the first tank 4 via the first connection pipe 101, and the third port 124 of the multiway valve 121 is connected to the second tank 5 via the connection pipe 102. Connected. The configurations of the pig station 10 and the feedback valve control device 7 are shown in FIGS.
This is the same as the embodiment shown in FIG.

As shown in FIG. 16, the first port 61 and the second port 62 of the multi-way valve 8 are connected, and the third port 6
The third and fourth ports 64 are closed and the multi-way valve 121 is closed.
Open the first port 122 and the second port 123 of
The third port 124 is closed. In this state, the pump 12
0, the first fluid flows from the first tank 4 through the multi-way valve 121, the pump 120, the multi-way valve 8, the supply pipe 1, the return pipe 2, the multi-way valve 9 and the connection pipe 113 to the first tank 4. Flow to 4. At this time, the first fluid can be removed from the dispensing station 3 by controlling the control valves 116 and 117.

When switching from the first fluid to the second fluid, the control valves 116 and 117 are closed, the pig station 10 is washed, and then the first port 61 and the fourth port 64 of the multi-way valve 8 are opened. And the second port 62
And the third port 63 is closed. Also, the multi-way valve 121
The first port 122 and the third port 124 are opened, and the second port 123 is closed. In this state, when the pig 70 is fired from the pig station 10 by the pressure of the second fluid supplied to the supply port 23 of the pig station 10, the pig 70 passes through the control valve 94 and the multi-way valve 8. When the pig 70 passes through the multi-way valve 8, the first pig detector 8a detects the magnetism of the pig 70 and generates a detection signal. When the fluid pressure from the supply port 23 of the pig station 10 is stopped by the pig control device according to the detection signal of the first pig detection device 8a, the pig 70 stops at a position adjacent to the first pig detection device 8a. Here, the third port 63 and the second port 62 of the multiway valve 8 are opened, and the first port 61 and the fourth port 64 are closed,
Next, the first port 122 and the third port 124 of the multi-way valve 121 are opened, the second port 123 is closed, and the pump 120 is driven. Thereby, the first fluid is discharged through the third port 63 of the control valve 8, and replaces the first fluid between the control valve 61 and the multi-way valve 121 with the second fluid. Here, while opening the first port 61 and the second port 62 of the multi-way valve 8, the third port 63 and the fourth port
Port 64 is closed, and the pump 120 is driven. Thereby, as shown in FIG. 17, the pig 70 passes through the supply pipe 1 and the return pipe 2, and the first fluid in front of the pig 70 supplies the supply pipe 1, the return pipe 2, the multi-way valve 9, and the connection pipe 113. The fluid is returned to the first tank 4 and the second fluid is supplied to the rear of the pig 70 through the multi-way valve 121, the pump 120, and the multi-way valve 8.

When the pig 70 approaches the fourth port 74 of the multi-way valve 9, the second pig detector 9a detects the pig 70. When the second pig detector 9a generates a detection signal, the pig controller opens the first port 71 and the fourth port 74 of the multi-way valve 9 and closes the second port 72 and the third port 73. At the same time, the control valve 93 and the control valve 96 are opened. Thereby, as shown in FIG. 19, the pig 70 is returned to the pig station 10, and thereafter, the first port 71 and the second port 72 of the multi-way valve 9 are returned.
Is closed and the third port 73 and the fourth port 74 are opened to form a second fluid circulation circuit as shown in FIG. That is, the second fluid is supplied from the second tank 5 to the second connection pipe 102, the multiway valve 121, the pump 120, the multiway valve 8, the supply pipe 1, the return pipe 2, the multiway valve 9, and the connection pipe 11.
4 and is returned to the second tank 5. At this time, a desired amount of the second fluid can be removed from the distribution station 3 by controlling the control valves 116 and 117.

Next, an operation for switching the circulation of the second fluid to the first fluid will be described.

After closing the control valves 116 and 117 and washing the pig station 10, the first port 61 and the fourth port 64 of the multi-way valve 8 are opened, and the second port 62 and the third port 63 is closed. In this state, when the pig 70 is fired from the pig station 10 by the pressure of the first fluid supplied to the supply port 23 of the pig station 10, the pig 70 is controlled by the control valve 94 and the multi-way valve 8
Pass through. When the pig 70 passes through the multi-way valve 8, the first
The pig detecting device 8a detects the magnetism of the pig 70 and generates a detection signal. According to the detection signal of the first pig detector 8a, the pig controller controls the supply port 2 of the pig station 10.
When the fluid pressure from 3 is stopped, the pig 70 stops at a position adjacent to the first pig detector 8a. Here, the third port 63 and the second port 62 of the multi-way valve 8 are opened, the first port 61 and the fourth port 64 are closed, and then the first port 122 of the multi-way valve 121 is closed. And opening the second port 123 and closing the third port 124 to drive the pump 120. As a result, the second fluid is discharged through the third port 63 of the control valve 8 and replaces the second fluid between the control valve 61 and the multi-way valve 121 with the first fluid. Here, the first port 61 and the second port 62 of the multiway valve 8 are opened, the third port 63 and the fourth port 64 are closed, and the first port 122 and the second port The port 123 is opened, the third port 124 is closed, and the pump 120 is driven. Thereby, as shown in FIG. 20, when the pig 70 passes through the supply pipe 1 and the return pipe 2, the second fluid in front of the pig 70 is supplied to the supply pipe 1, the return pipe 2, the multi-way valve 9, and the connection pipe 114. , And is returned to the second tank 5, and the first fluid is supplied to the rear of the pig 70 by the pump 120. Pig 70
Approaches the fourth port 74 of the multi-way valve 9, the second pig detector 9 a detects the pig 70. When the second pig detector 9a generates a detection signal, the pig controller opens the first port 71 and the fourth port 74 of the multi-way valve 9 and closes the second port 72 and the third port 73. At the same time, the control valve 93 and the control valve 96 are opened. As a result, as shown in FIG. 22, the pig 70 is returned to the pig station 10, and thereafter, the first port 71 and the third port 73 of the multi-way valve 9 are closed, and the second port 72 is closed.
When the fourth port 74 is opened, a circulation circuit for the first fluid is formed as shown in FIG. That is, the first fluid passes from the first tank 4 through the first connection pipe 101, the multiway valve 121, the pump 120, the multiway valve 8, the supply pipe 1, the return pipe 2, the multiway valve 9, and the connection pipe 113, First tank 4
Is returned to. At this time, a desired amount of the first fluid can be removed from the distribution station 3 by controlling the control valves 116 and 117.

FIGS. 23-31 illustrate a third embodiment of the present invention in which a single pump is used to differentiate between a first fluid and a second fluid and circulate in a closed loop. 23 to 31
Then, the same reference numerals are given to the same portions as those used in the embodiment shown in FIGS. 1 to 22, and description thereof will be omitted.

As shown in FIG. 23, in the third embodiment, the supply pipe control valve device 6 comprises a multiway valve 8 and a multiway valve 130, and the return pipe control valve device 7 comprises a pig station 1
40 and the control valve 9. The first port 61 of the multi-way valve 8 is connected to the second port 132 of the multi-way valve 130, and the first port 131 of the multi-way valve 130 is connected to the control valve 210.
Is connected to the supply pipe 1 via the. The control valve 150 is connected between the first port 131 of the multi-way valve 130 and the control valve 210. A control valve 146 is connected between the second port 162 of the multi-way valve 160 and the first port 141 of the pig station 140. Second of pig station 140
Port 142 of the multi-way valve 9 via the control valve 143
Port 71 is connected. Between the third port 163 of the multi-way valve 160 and the third port 133 of the multi-way valve 130, two pig stations 171 and 172 are provided.
3 is provided.

A first port 181 of the multi-way valve 180 is connected to the end of the supply pipe 1, and a second port 182 of the multi-way valve 180 is connected to the return port 3 b of the distribution station 3 via the control valve 116. Connected. The third port 183 of the multi-way valve 180 is connected to the first port 191 of the multi-way valve 190, and the second port 192 of the multi-way valve 190 is connected to the control valve 11
7 to the distribution station 3. The third port 193 is connected to one end of the return pipe 2, and the other end of the return pipe 2 is connected to the entrance 144 of the pig station 140. A pig detector 140a is provided at the entrance 144. Pig stations 140, 171 and 172 have the same structure as pig station 10. Pigs 70 are stored in the pig stations 171 and 172, respectively. FIG. 23 shows that the first fluid stored in the first tank 4 includes the multi-way valve 121, the pump 120, and the multi-way valves 8 and 13.
0, control valve 210, supply pipe 1, multi-way valve 180, multi-way valve 1
90, return pipe 2, pig station 140, control valve 14
3 and return to the first tank 4 through the multi-way valve 9 and the connection pipe 113. In this state, when the control valves 116 and 117 are opened, the first fluid is supplied to the distribution station 3, and the excess first fluid of the distribution station 3 passes through the control valve 117 and the multi-way valve 190 and returns to the return pipe 2. Is returned to.

When switching the first fluid supplied to the distribution station 3 to the second fluid, the surrounding pipe including the pump 120 is cleaned as shown in FIG. That is, the multi-way valve 12 that receives the cleaning liquid from the fourth port 125
The first port 122 is discharged from the control valve 150 through the pump 120, the multi-way valves 8 and 130. afterwards,
As shown in FIG. 25, the multi-way valves 121, 8 and 160 are switched, and the second fluid from the second tank 5 is supplied to the second connection pipe 102, the multi-way valve 121, the pump 120, the multi-way valve 8, the multi-way valve 160 and Pig Station 172,
It is discharged from the control valve 174. As a result, the first fluid is replaced by the second fluid. Thereafter, as shown in FIG. 26, a pair of pigs 70 are connected to pig stations 171 and 1.
Fire from 72 toward the supply tube 1. A pair of pigs 70
Are spaced from each other, each pig station 171,
From 172, the water is sent from the return pipe 2 to the pig station 140 through the multiway valve 130, the control valve 210, the supply pipe 1, the multiway valve 180, and the multiway valve 190. At this time, the front pig 70
First liquid is present in front of the front and rear pigs 70.
In between, there is a cleaning liquid, and behind the rear pig 70 there is a second liquid. When the front pig 70 approaches the pig station 140, the pig detector 140a detects the front pig 70. Next, as shown in FIG. 27, the front pig 70 is housed in the pig station 140, and as shown in FIG.
Return to 1. At this time, the control valve 175 is opened, and the cleaning liquid is supplied to the multi-way valves 71 and 143, the pig station 140, and the control valve 1
46, multi-way valve 160, pig stations 172, 171
Through the control valve 175 to clean the inside of the pipe. Subsequently, as shown in FIG. 29, when the rear pig 70 is accommodated in the pig station 140, the second liquid is supplied to the front of the pig station 140. Thereafter, as shown in FIG. 30, the rear pig 70 is housed in the pig station 172 by the washing liquid from the fourth port 74 of the multi-way valve 9. At this time, the control valve 174 is opened, and the multi-way valve 9, the pig station 140, the multi-way valve 160,
The inside of the pipe is washed through the pig station 172 and the control valve 174. As shown in FIG. 31, the control valve 143 is opened, and the second fluid returned through the return pipe 2 is passed through the pig station 140, the control valve 143, and the multi-way valve 9 to the second fluid.
Return to tank.

The embodiment of the present invention is not limited to the above example, but can be modified. For example, the multi-way valve is not limited to a multi-way valve having an integral structure, and may be a two-way valve or a three-way valve, or a combination valve configured by combining a two-way valve and a three-way valve.

As shown in FIG. 32, a tapered portion 20a whose diameter decreases toward the discharge port 51 may be formed in the chamber 21. As shown in FIG. 33, the control valve 94 may be closed by the output of the pig detecting device 20b provided adjacent to the chamber 21 to prevent the pig 70 from moving.

[0049]

According to the present invention, the following effects can be obtained. 1 By controlling the supply pipe control valve apparatus and the return pipe control valve apparatus, the fluid contained in the first tank and the second tank is selectively supplied to the outlet through the supply pipe control valve apparatus and the supply pipe. it can. 2. Excess fluid supplied to the outlet can selectively return the fluid to the first tank and the second tank through the return pipe and the return pipe control valve device. (3) Fluid pressure is applied to the pig mounted on the pig station, introduced into the supply pipe, and returned to the pig station through the return pipe to wash the inner walls of the supply pipe and the return pipe. 4 Pigs are always arranged at the pig station, and when the supply pipe and the return pipe need to be cleaned, the supply pipe, the return pipe and the pig station constituting the closed loop can be circulated and cleaned. Since the pig does not need to be taken out of the closed loop and circulates through the closed loop, cleaning can be performed efficiently. 6 In a closed loop state, the inside of the line can be automatically cleaned using a pig and a cleaning fluid. 7. The fluid in the line can be extruded with a pig and automatically replaced with another fluid. Since the 8 pigs effectively scrape off the fluid attached to the inner wall of the line, it can be cleaned with the minimum necessary fluid.

[Brief description of the drawings]

FIG. 1 is a pipeline diagram of an automatic supply fluid exchange device according to the present invention for circulating a first fluid from a first tank.

FIG. 2 is a pipe diagram of an automatic supply fluid exchange device for cleaning with a pig.

FIG. 3 is a pipeline diagram of an automatic supply fluid exchange device according to the present invention for circulating a second fluid from a second tank.

FIG. 4 is a pipe diagram in a state where a pig is returned to a pig station.

FIG. 5 is a pipeline diagram when a pig is moved along a supply pipe when switching from a second fluid to a first fluid.

FIG. 6 is a pipeline diagram showing a state in which a pig has passed through a return pipe.

FIG. 7 is a pipeline diagram in a state where the pig is returned to the pig station.

FIG. 8 is a sectional view of a pig station.

FIG. 9 is a left side view of FIG. 1;

FIG. 10 is a schematic diagram showing a state where a pig station is connected to a pipe.

FIG. 11 is a sectional view (1) showing an operation when stopping the pig.

FIG. 12 is a sectional view (2) showing an operation when stopping the pig.

FIG. 13 is a sectional view (3) showing the operation when stopping the pig.

FIG. 14 is a sectional view (4) showing the operation when stopping the pig.

FIG. 15 is a sectional view (5) showing the operation when stopping the pig.

FIG. 16 is a pipeline diagram of a supply fluid automatic exchange device according to a second embodiment of the present invention for circulating a first fluid from a first tank.

FIG. 17 is a pipe diagram of the automatic supply fluid exchange device shown in FIG. 16 in the case of cleaning with a pig.

FIG. 18 is a pipeline diagram of an automatic supply fluid exchange device according to another embodiment for circulating the second fluid from the second tank.

FIG. 19 is a pipeline diagram in a state where the pig is returned to the pig station.

FIG. 20 is a pipeline diagram when a pig is moved along a supply pipe when switching from a second fluid to a first fluid.

FIG. 21 is a pipe diagram showing a state where a pig has passed through a return pipe.

FIG. 22 is a pipe diagram in a state where the pig is returned to the pig station.

FIG. 23 is a pipeline diagram of an apparatus for automatically changing supply fluid according to a third embodiment of the present invention for circulating a first fluid from a first tank.

FIG. 24 is a pipe diagram showing a state of cleaning around the pump;

FIG. 25 is a pipeline diagram showing a state in which the second fluid is supplied to the pig station.

FIG. 26 is a pipeline diagram showing a state in which two pigs are passed from a pig station through a supply pipe and a return pipe.

FIG. 27 is a pipeline diagram showing a state in which a front pig is accommodated in a pig station constituting a return pipe control valve device.

FIG. 28 is a pipeline diagram showing a state in which a pig at the front is accommodated in a pig station provided in a storage pipe;

FIG. 29 is a pipeline diagram showing a state in which a rear pig is accommodated in a pig station constituting a return pipe control valve device.

FIG. 30 is a pipeline diagram showing a state where front and rear pigs are accommodated in a pig station provided in a storage pipe.

FIG. 31 is a pipeline diagram showing a state in which the second fluid is returned to the second tank.

FIG. 32 is a sectional view showing an embodiment in which a tapered portion is formed in a chamber.

FIG. 33 is a sectional view showing an embodiment in which a pig detection device is provided in a chamber.

[Explanation of symbols]

1. supply pipe, 2. return pipe, 3. outlet, 4.
..The first tank, the 5th second tank, the supply pipe control valve device, the return pipe control valve device, 8, 9, 1
21 ··· Multi-way valve, 10, 140, 171, 172 ···
Pig station, 15 guide tube, 20 housing, 21 chamber, 22 inlet, 23
..Supply port, 24..Outlet port, 30..Sleeve,
31, flange part, 32 inner pipe part, 33 connection part, 36 through hole, 40 taper part, 41
..Loading port, 47..Horizontal hole, 49..Connection part, 5
0 ··· straight pipe part, 51 ··· launch port, 61 ··· first port, 62 ··· second port, 63 ··· third port, 64 ··· fourth port, 70 ··· pig, 71
..The first port, 72. the second port, 73.
.3rd port, 74.4th port, 70c.
-Skirt part, 91-End of pipe, 92-Start of pipe, 102, 103, 110, 114-Connection pipe,
111, 112, 120 ··· pump, 116 ··· control valve, 130 ··· multi-way valve, 131 ··· first port,
132 second port, 142 second port, 143 control valve, 144 inlet 150
..Control valve, 161..first port, 162 ..
The second port, 163 ... the third port, 173 ...
Containment tube, 180 multi-way valve, 181 first port, 182 second port, 183 third port, 190 multi-way valve, 191 first port, 192 Second port, 193 third port, 210 control valve,

Claims (36)

[Claims] 1. A supply pipe (1) connected to a distribution station (3) and at least a first tank (1) containing respectively a first fluid and a second fluid and connected to the supply pipe (1). 4) and a second tank (5) and a return pipe (2) connected to the distribution station (3), the first tank (4) and the second tank (5) being connected to the return pipe (2). ) Is connected to the supply pipe (1) and is connected to the first tank (4) and the second tank.
Supply pipe control valve device (6) connected to the tank (5)
And a first tank (4) provided in the return pipe (2) and a second tank (4).
Return pipe control valve device (7) connected to the tank (5)
And a pig station (10) connected between the supply pipe control valve device (6) and the return pipe control valve device (7) and having a pig (70), the supply pipe (1) and the return pipe. (2) and pig station (1
0) a closed loop is formed, and the pig (70) can be circulated from the pig station through the closed loop. 2. The supply pipe control valve device (6) has a first port (61) connected to the supply pipe (1) and a second port (62) connected to the first tank (4). ) And the second
A third port (63) connected to the tank (5) of the
The automatic supply fluid exchange device according to claim 1, comprising a multi-way valve (8) having a fourth port (64) connected to the pig station (10). 3. A first connection pipe (10) connecting a second port (62) of the multi-way valve (8) and the first tank (4).
The supply fluid automatic exchange device according to claim 2, wherein a first pump (111) is connected to 1). 4. A second connection pipe (10) connecting the third port (63) of the multi-way valve (8) and the second tank (5).
The supply fluid automatic exchange device according to claim 2, wherein a second pump (112) is connected to (2). 5. A return pipe control valve device (7) comprising: a first port (71) connected to a pig station (10);
Second port (72) connected to first tank (4)
And a third port (7) connected to the second tank (5).
3) and a fourth port (7) connected to the return pipe (2).
The automatic supply fluid exchange device according to claim 1, further comprising a multi-way valve (9) having the following. 6. The supply pipe control valve device (6) is connected to a first port (61) connected to the supply pipe (1) and to a first port (122) of the multi-way valve (121). Second
Port (62) and a multi-way valve (8) having a fourth port (64) connected to the pig station (10), the second port (123) of the multi-way valve (121) being the first port (123).
The automatic supply fluid exchange device according to claim 1, wherein the third port (124) is connected to the second tank (5), and the third port (124) is connected to the second tank (5). 7. A supply pipe control valve device (6) and a multi-way valve (12).
7. The supply fluid automatic exchange device according to claim 6, wherein a pump (120) is connected between the device and (1). 8. The automatic supply fluid exchange device according to claim 1, further comprising a pig detecting device (8a, 9a) adjacent to the supply pipe control valve device (6) and the return pipe control valve device (7). 9. The pig station (10) comprises a housing (20) having a chamber (21), the housing (20) comprising an inlet (22) connected to a pipe end (91) and a chamber (21). And a supply port (23) for supplying a fluid to the inside of the chamber (21) by applying a fluid pressure from the supply port (23) to the pig (70) disposed in the chamber (21). The supply fluid automatic exchange device according to claim 1, wherein the supply fluid can be pressure-fed from (51) into the pipe. 10. The automatic supply fluid exchange device according to claim 9, wherein a tapered portion (20a) whose diameter decreases toward the discharge port (51) is formed in the chamber (21). 11. The supply according to claim 9, wherein the control valve (94) is closed by the output of a pig detector (20b) provided adjacent to the chamber (21) to prevent the pig (70) from moving. Fluid automatic changer. 12. A sleeve (30) fixed to the housing (20) has a through hole (36) communicating with the chamber (21), and a loading port (41) formed at one end of the through hole (36). And a discharge port (51) connected to the starting end (92) of the pipe and formed at the other end of the through hole (36), and the diameter decreases from the loading port (41) toward the discharge port (51). A taper portion (40) is formed in the through hole (36), and fluid pressure is applied from the supply port (23) into the chamber (21) to cause the pig (70) disposed in the through hole (36) to be discharged from the discharge port ( The automatic supply fluid changing device according to claim 9, wherein the supply fluid can be pressure-fed into the pipe from (51). 13. A feed fluid automatic according to claim 12, wherein a straight pipe portion (50) connected to the same axis as the tapered portion (40) and connected to the discharge port (51) is formed in the through hole (36). Exchange equipment. 14. A sleeve (30) is provided in the chamber (2).
1) an inner tube portion (32) extending into the housing;
14. The automatic supply fluid exchange device according to claim 12, further comprising: a connection portion (33) extending outside of the supply fluid. 15. The sleeve (30) is connected to the housing (2).
0), the inner tube portion (32) extends from the flange portion (31) into the chamber (21), and the connecting portion (33) extends from the flange portion (31) to the housing (20). 15. The automatic supply fluid exchange device according to claim 14, which extends outside of the above). The inner diameter of the loading port (41) is a pig (70).
The outer diameter of the skirt (70c) of the pig (70) is larger than the outer diameter of the skirt (70c) of the pig (70).
The supply fluid automatic exchange device according to any one of claims 12 to 15, wherein the outer diameter is slightly smaller than the outer diameter of the supply fluid. 17. A pig station (10) comprising a housing (20) having a chamber (21), a sleeve (30) fixed to the housing (20) and having a through hole (36), and a sleeve (30). A guide pipe (1) arranged on the same axis and connected to the end (91) of the pipe.
The housing (20) has an inlet (22) connected to the guide tube (15) and an outlet (24) for discharging the fluid in the chamber (21), and the sleeve (30). ) Is formed at one end of the through hole (36) communicating with the chamber (21), and at the other end of the through hole (36), connected to the starting end (92) of the pipe. A discharge port (51), a tapered portion (40) having a diameter reduced from the loading port (41) toward the discharge port (51) is formed in the through-hole (36), and a guide is formed from the end (91) of the pipe. The automatic supply fluid exchange device according to claim 12, wherein the pig (70) fed through the pipe (15) is stopped in the through hole (36). 18. The supply fluid according to claim 17, wherein a straight pipe portion (50) connected to the same axis as the tapered portion (40) and connected to the discharge port (51) is formed on the inner surface of the sleeve (30). Automatic exchange device. A sleeve (30) is provided in the chamber (2).
1) an inner tube portion (32) extending into the housing;
19. The automatic supply fluid exchange device according to claim 17, further comprising a connecting portion (33) extending outside of the supply fluid. 20. The sleeve (30) is connected to the housing (2).
0), the inner tube portion (32) extends from the flange portion (31) into the chamber (21), and the connecting portion (33) extends from the flange portion (31) to the housing (20). 20. The automatic supply fluid exchange device according to claim 19, which extends outside of the device. 21. The inner diameter of the loading port (41) is a pig (70).
The outer diameter of the skirt (70c) of the pig (70) is larger than the outer diameter of the skirt (70c) of the pig (70).
The supply fluid automatic exchange apparatus according to any one of claims 17 to 20, wherein the outer diameter is slightly smaller than the outer diameter of the supply fluid. 22. One or more lateral holes (4) for communicating fluid pressure in the through holes (36) to the outside of the sleeve (30).
22. The automatic supply fluid exchange device according to claim 17, wherein 7) is formed on the sleeve (30). 23. A lateral hole (47) is formed near a connecting portion (49) between the tapered portion (40) and the straight pipe portion (50), and is provided in front of the pig (70) in the through hole (36). Fluid pressure is applied through the lateral hole (47) and the chamber (21) to the outlet (24).
23. The automatic supply fluid exchange device of claim 22, wherein 24. A housing (20) having a chamber (21), a sleeve (30) fixed to the housing (20) and having a through hole (36), and a sleeve (3).
0) and a guide tube (15) arranged coaxially and connected to the end (91) of the pipe, the housing (20) comprising an inlet (22) connected to the guide tube (15); It has a supply port (23) for supplying fluid into the chamber (21) and a discharge port (24) for discharging fluid in the chamber (21), and the sleeve (30) communicates with the chamber (21). It has a loading port (41) formed at one end of the through hole (36) and a firing port (51) connected to the starting end (92) of the pipe and formed at the other end of the through hole (36), The fluid pressure is applied to the chamber (21) from the supply port (23), and the pig (70) arranged in the through hole (36) is pressure-fed from the discharge port (51) into the pipe, and the end of the pipe (91) The pig (70) sent from the pipe through the guide tube (15) stops in the through hole (36). 13. The supply fluid automatic exchange device according to claim 12, which stops the operation. 25. The supply fluid automatic according to claim 24, wherein a straight pipe portion (50) connected to the same axis as the tapered portion (40) and connected to the discharge port (51) is formed in the through hole (36). Exchange equipment. 26. The sleeve (30) is provided in the chamber (2).
1) an inner tube portion (32) extending into the housing;
26. The automatic supply fluid exchange device according to claim 24, further comprising a connecting portion (33) extending outside of the supply fluid. 27. The sleeve (30) is connected to the housing (2).
0), the inner tube portion (32) extends from the flange portion (31) into the chamber (21), and the connecting portion (33) extends from the flange portion (31) to the housing (20). 27) The automatic supply fluid exchange device according to claim 26, which extends outside of the device. 28. The inner diameter of the loading port (41) is a pig (70).
The outer diameter of the skirt (70c) of the pig (70) is larger than the outer diameter of the skirt (70c) of the pig (70).
The supply fluid automatic exchange device according to any one of claims 24 to 27, wherein the outer diameter is slightly smaller than the outer diameter of the supply fluid. 29. One or more lateral holes (4) for communicating fluid pressure in the through holes (36) to the outside of the sleeve (30).
29. An apparatus according to claim 24, wherein 7) is formed in a sleeve (30). 30. A lateral hole (47) is formed near a connecting portion (49) between a tapered portion (40) and a straight pipe portion (50), and is provided in front of a pig (70) in a through hole (36). Fluid pressure is applied through the lateral hole (47) and the chamber (21) to the outlet (24).
30. The automatic supply fluid exchange device of claim 29, wherein the device is contacted. 31. The automatic supply fluid exchange device according to claim 1, wherein the supply pipe control valve device (6) comprises two multi-way valves (8) and (130). 32. The automatic supply fluid exchange device according to claim 1, wherein the return pipe control valve device (7) comprises a pig station (140) and a control valve (146). 33. First port (61) of a multi-way valve (8)
Is connected to the second port (132) of the multi-way valve (130), and the first port (131) of the multi-way valve (130) is connected to the supply pipe 1 via the control valve (210).
Automatic supply fluid exchange device according to 1. 34. The first port (1) of the multi-way valve (130).
31. The apparatus according to claim 30, wherein a control valve (150) is connected between the control valve (31) and the control valve (210). 35. The second port (1) of the multi-way valve (160).
The control valve (146) is connected between the first port (141) of the pig station (140) and the first port (141) of the pig station (140), and the control valve (143) is connected to the second port (142) of the pig station (140). Via a third port (163) of the multi-way valve (160) and a third port (13) of the multi-way valve (130).
3) and two pig stations (171, 17)
The automatic supply fluid exchange device according to claim 1, wherein 2) is provided in the storage pipe (173). 36. A multi-way valve (18) is provided at the end of the supply pipe (1).
0) is connected to the multiport valve (1).
The second port (182) of 80) is connected to the distribution station (3) via the control valve (116) and the multi-way valve (1)
The third port (183) of the multi-way valve (190) is connected to the first port (191) of the multi-way valve (190).
Second port (192) is connected to the distribution station (3) via a control valve (117) and the third port (1)
93) is connected to one end of the return pipe (2), and is connected to the return pipe (2).
The other end is the entrance (144) of the pig station (140)
Are connected to the pig stations (171) and (17).
The supply fluid automatic exchange device according to claim 1, wherein each of the pigs (70) is stored in (2).