Emergency release structure for fluid handling equipment

Abstract

This invention provides an emergency release structure that suppresses the pressure rise in the space between valve bodies that have closed the flow path. [Solution] The emergency release structure 2 for a fluid handling device comprises a first housing 7 having a flow path 7A, a first valve body 8 that abuts against the valve seat 7D of the first housing 7 and closes the flow path 7A, a second housing 9 having a flow path 9A, a second valve body 10 that abuts against the valve seat 9D of the second housing 9 and closes the flow path 9A, a clamp 13 that connects the first housing 7 and the second housing 9 with the open end face 7C of the first housing 7 and the open end face 9C of the second housing 9 abutting together, a first driver 11 that moves the first valve body 8, a second driver 12 that moves the second valve body 10, and a controller 19 that moves the first valve body 8 to the first driver 11 and moves the second valve body 10 to the second driver 12 by staggering the timing of when the first valve body 8 abuts against the valve seat 7D and when the second valve body 10 abuts against the valve seat 9D.

Description

[Technical Field]

[0001] This specification discloses an emergency disconnect structure for a fluid cargo handling device. [Background Art]

[0002] Japanese Patent Laid-Open No. 2023-5594 discloses an emergency disconnect structure for a fluid cargo handling device. This fluid cargo handling device is a device that transports fluid such as liquefied gas from an onshore facility to a tank of a ship. This emergency disconnect structure for a fluid cargo handling device includes a pair of pipe sections, a valve body that seats on a valve seat formed in a flow path of the pipe section to close the flow path, and a linear drive device that moves the valve body to seat it on the valve seat. In this emergency disconnect structure, with the open ends of the pair of pipe sections butted against each other, the linear drive device closes the flow path with the valve body. This emergency disconnect structure can separate the pair of pipe sections in a state where the flow path is closed. [Prior Art Literature] [Patent Literature]

[0003] [Patent Literature 1] Japanese Patent Laid-Open No. 2023-5594 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] In the emergency disconnect structure disclosed in Japanese Patent Laid-Open No. 2023-5594, the flow path is closed in a state where the open ends of the pair of pipe sections are butted against each other. This emergency disconnect structure is configured such that, when the open ends are butted against each other, the valve bodies that seat on the respective valve seats do not interfere with each other. Therefore, when the open ends are butted against each other, a space is formed between the valve bodies that have closed the flow path. The pressure in this space is likely to rise when the pair of valve bodies close the flow path.

[0005] It is an object of the present application to provide an emergency disconnect structure that suppresses a pressure increase in the space formed between the valve bodies that have closed the flow path. [Means for Solving the Problem]

[0006] The emergency release structure disclosed herein is an emergency release structure for a fluid handling device that transports fluids, A first housing having a flow path, an open end face in which an opening of the flow path is formed, and a valve seat located within the flow path, A first valve body located within the flow path of the first housing and in contact with the valve seat of the first housing, closing the opening of the flow path of the first housing, A second housing having a flow path, an open end face in which an opening for the flow path is formed, and a valve seat located within the flow path, A second valve body located within the flow path of the second housing and in contact with the valve seat of the second housing, closing the opening of the flow path of the second housing, A clamp that connects the first housing and the second housing so that they can be separated, with the open end face of the first housing and the open end face of the second housing abutting together and the flow path of the first housing and the flow path of the second housing connected. A first driver that moves the first valve body between a position in contact with the valve seat of the first housing and a position away from the valve seat of the first housing, A second driver that moves the second valve body between a position in contact with the valve seat of the second housing and a position away from the valve seat of the second housing. And, A controller that moves the first valve body to the first drive and the second valve body to the second drive by staggering the timing of when the first valve body contacts the valve seat of the first housing and when the second valve body contacts the valve seat of the second housing. It is equipped with. [Effects of the Invention]

[0007] This emergency release structure can suppress the pressure increase in the space between valve bodies that have closed the flow path. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an explanatory diagram showing a fluid handling device equipped with an emergency release structure according to one embodiment. [Figure 2] Figure 2 is an explanatory diagram showing the emergency release structure of Figure 1 in operation with the flow path open. [Figure 3] Figure 3 is a magnified view of the section indicated by the symbol III in Figure 2. [Figure 4] Figure 4 is an explanatory diagram showing the emergency release structure of Figure 1 in operation with the flow path closed. [Figure 5] Figure 5 is an explanatory diagram showing the usage state with the emergency release structure of Figure 2 detached. [Figure 6] Figure 6A is an explanatory diagram showing the usage state of the emergency release structure in Figure 2, with the pair of valve bodies closer to the valve seat. Figure 6B is an explanatory diagram showing the usage state in Figure 6A, with one valve body even closer to the valve seat and the other valve body in contact with the valve seat. [Figure 7] Figure 7 is a cross-sectional view showing a part of an emergency release structure according to another embodiment. [Modes for carrying out the invention]

[0009] Preferred embodiments will be described in detail below, with reference to drawings as appropriate.

[0010] Figure 1 shows a fluid handling device 1. The fluid handling device 1 is a device for transporting fluids, for example, between a tanker and a land-based facility. The fluid to be transported is, for example, liquefied hydrogen. The fluid to be transported is not particularly limited and may be LNG, liquefied ethylene, etc., or a gas such as hydrogen gas.

[0011] The fluid handling device 1 comprises an emergency release structure 2, a joint 3 connected to one side of the emergency release structure 2, a movable pipe 4 connected to the other side of the emergency release structure 2, an arm 5 supporting the movable pipe 4, and a support column 6 supporting the arm 5. The joint 3 is connected to a ship such as a tanker. The movable pipe 4 extends along the arm 5 and the support column 6 and is connected to a land-based facility. The arm 5 is rotatable horizontally relative to the support column 6 and tiltable vertically relative to the support column 6. The emergency release structure 2 is attached to the arm 5, is rotatable relative to the arm 5, and can be moved to various positions by the arm 5.

[0012] Figure 2 shows a cross-section of the emergency release structure 2. The emergency release structure 2 comprises a first housing 7 connected to the joint 3 and a first valve body 8 located inside the first housing 7. The emergency release structure 2 also comprises a second housing 9 connected to the movable piping 4 and a second valve body 10 located inside the second housing 9. Furthermore, the emergency release structure 2 comprises a first drive unit 11 for moving the first valve body 8 and a second drive unit 12 for moving the second valve body 10. In addition, the emergency release structure 2 comprises a clamp 13 connecting the first housing 7 and the second housing 9. In this emergency release structure 2, the first housing 7 is located below the second housing 9 in the vertical direction.

[0013] The first drive unit 11 and the second drive unit 12 illustrated in Figure 2 are hydraulic drive units. This emergency release structure 2 includes a hydraulic circuit 14 that operates the first drive unit 11 and the second drive unit 12. The hydraulic circuit 14 includes a switching valve 15 that operates the first drive unit 11, a switching valve 16 that operates the second drive unit 12, and a joint 18 that connects the hydraulic piping 17A connected to the first drive unit 11 to the hydraulic piping 17B connected to the hydraulic power source in a way that allows it to be detached. The first drive unit 11 may be any drive unit that moves the first valve body 8, and may be an electric motor and a linear motion structure. Similarly, the second drive unit 12 may be an electric motor and a linear motion structure.

[0014] The emergency release structure 2 comprises a controller 19 that controls hydraulic equipment. The controller 19 causes the switching valve 15 to supply and discharge hydraulic oil to and from the first driver 11. The controller 19 causes the switching valve 16 to supply and discharge hydraulic oil to and from the second driver 12.

[0015] Figure 3 shows a partially enlarged view of Figure 2. The first housing 7 has a flow passage 7A through which liquid hydrogen flows, an opening 7B of the flow passage 7A, an opening end face 7C formed with the opening 7B, and a valve seat 7D located inside the flow passage 7A. The valve seat 7D is formed inside the flow passage 7A from the opening 7B. It should be noted that the valve seat 7D may also be formed inside the flow passage 7A at a position spaced apart from the opening 7B. The valve seat 7D is a tapered inner peripheral surface that tapers from the inside of the flow passage 7A toward the opening 7B.

[0016] The first valve body 8 is located inside the flow passage 7A of the first housing 7. The first valve body 8 has a seat surface 8A and an end face 8B facing the second valve body 10. The seat surface 8A is a tapered outer peripheral surface that tapers toward the end face 8B at the tip end.

[0017] The second housing 9 has a flow passage 9A through which liquid hydrogen flows, an opening 9B of the flow passage 9A, an opening end face 9C formed with the opening 9B, and a valve seat 9D located inside the flow passage 9A. The valve seat 9D is formed inside the flow passage 9A from the opening 9B. It should be noted that the valve seat 9D may also be formed inside the flow passage 9A at a position spaced apart from the opening 9B. The valve seat 9D is a tapered inner peripheral surface that tapers from the inside of the flow passage 9A toward the opening 9B.

[0018] The second valve body 10 is located inside the flow passage 9A of the second housing 9. The second valve body 10 has a seat surface 10A and an end face 10B facing the first valve body 8. The seat surface 10A is a tapered outer peripheral surface that tapers toward the end face 10B at the tip end.

[0019] Furthermore, although omitted in Figure 2, as shown in Figure 3, the first housing 7 has an inner pipe 7E and an outer pipe 7F, and has a double-pipe structure with a vacuum between the inner pipe 7E and the outer pipe 7F. This first housing 7 has an insulating structure. The second housing 9 also has an inner pipe 9E and an outer pipe 9F, and has a double-pipe structure with a vacuum between the inner pipe 9E and the outer pipe 9F. This second housing 9 also has an insulating structure.

[0020] As shown in Figure 2, the first drive unit 11 is mounted on the first housing 7. The first drive unit 11 is connected to the first valve body 8. The first drive unit 11 is a drive that moves the first valve body 8 along the flow path 7A. The first drive unit 11 positions the first valve body 8 in an open position away from the valve seat 7D. The second drive unit 12 is mounted on the second housing 9. The second drive unit 12 is connected to the second valve body 10. The second drive unit 12 is a drive that moves the second valve body 10 along the flow path 9A. The second drive unit 12 positions the second valve body 10 in an open position away from the valve seat 9D. In the operating state shown in Figure 2, liquid hydrogen can flow through the flow paths 7A and 9A.

[0021] The clamp 13 is attached to the first housing 7 and the second housing 9, connecting the first housing 7 and the second housing 9. The clamp 13 clamps the first housing 7 and the second housing 9 with its open end faces 7C and 9C abutting against each other. The clamp 13 is removable from the first housing 7 and the second housing 9. By removing the clamp 13, the first housing 7 and the second housing 9 can be separated. The clamp 13 is not limited to the clamp 13 shown in Figure 2, as long as it connects the first housing 7 and the second housing 9 in a way that allows them to be separated.

[0022] Figure 4 shows a cross-section of the emergency release structure 2 in other operating conditions. In Figure 4, the first drive unit 11 is positioned in a closed position with the first valve body 8 in contact with the valve seat 7D. The first valve body 8 is blocking the opening 7B of the flow path 7A. The second drive unit 12 is positioned in a closed position with the second valve body 10 in contact with the valve seat 9D. The second valve body 10 is blocking the opening 9B of the flow path 9A. In Figure 4, both the flow path 7A and the flow path 9A are blocked.

[0023] The seat surface 8A of the first valve body 8 is in contact with the valve seat 7D of the first housing 7. The first valve body 8 blocks the flow path 7A of the first housing 7. The end face 8B of the first valve body 8 is located further inward into the first housing 7 than the open end face 7C. The first valve body 8 is recessed further inward into the first housing 7 than the open end face 7C. The seat surface 10A of the second valve body 10 is in contact with the valve seat 9D of the second housing 9. The second valve body 10 blocks the flow path 9A of the second housing 9. The end face 10B of the second valve body 10 is located further inward into the second housing 9 than the open end face 9C. The second valve body 10 is recessed further inward into the second housing 9 than the open end face 9C.

[0024] With the open end face 7C of the first housing 7 and the open end face 9C of the second housing 9 abutting together, the first valve body 8 abuts against the valve seat 7D and the second valve body 10 abuts against the valve seat 9D. A space 20 is created between the first valve body 8 and the second valve body 10. This space 20 is partitioned and sealed by the first valve body 8 and the second valve body 10. This space 20 only needs to be small enough that the first valve body 8 and the second valve body 10 do not interfere with each other.

[0025] In the operating state shown in Figure 5, the clamp 13 is removed. The first housing 7 and the second housing 9 are separated. The first housing 7 is positioned below the second housing 9, and the second housing 9 is separated above the first housing 7. The joint 18 is separated into a female joint 18A and a male joint 18B. The female joint 18A is separated from the male joint 18B while retaining the hydraulic pressure of the hydraulic piping 17A connected to the first drive unit 11. The male joint 18B is separated from the female joint 18A while retaining the hydraulic pressure of the hydraulic piping 17B connected to the hydraulic source. Alternatively, the female joint 18A may be connected to the hydraulic piping 17B and the male joint 18B may be connected to the hydraulic piping 17A, the opposite of Figure 5. The emergency release structure 2 is configured in the same way as in the operating state shown in Figure 4 for other operating conditions.

[0026] Figure 6A shows other operating conditions of the emergency release structure 2 that differ from the operating condition shown in Figure 3. In Figure 6A, the first valve body 8 is in a position closer to the valve seat 7D compared to the operating condition shown in Figure 3. The second valve body 10 is in a position closer to the valve seat 9D compared to the operating condition shown in Figure 3. In Figure 6A, the position of the first valve body 8 and valve seat 7D is closer than the position of the second valve body 10 and valve seat 9D.

[0027] Figure 6B shows yet another operating state of the emergency release structure 2, different from the operating state shown in Figure 3. In Figure 6B, the first valve body 8 is in contact with the valve seat 7D, and the second valve body 10 is in a position closer to the valve seat 9D compared to the operating state shown in Figure 6A. In Figure 6B, the first valve body 8 is in the closed position, and the second valve body 10 is in the process of moving toward the valve seat 9D.

[0028] In the use of the fluid handling device 1 in Figure 1, for example, the movable piping 4 is connected to the land facility. The fluid handling device 1 moves the joint 3 to a position where it is connected to the joint connection of the tanker. The joint 3 is connected to the joint connection of the tanker. The emergency release structure 2 is put into the use state shown in Figure 2. Under normal circumstances, liquefied hydrogen is transported between the land facility and the tanker. In this emergency release structure 2, with the flow path 7A of the first housing 7 and the flow path 9A of the second housing 9 connected, the first valve body 8 is movable between a position away from the valve seat 7D and a position in contact with the valve seat 7D. Similarly, the second valve body 10 is movable between a position away from the valve seat 9D and a position in contact with the valve seat 9D.

[0029] On the other hand, strong winds or high waves may cause the land-based facility and the tanker to move beyond a predetermined distance. In such an emergency, the controller 19 outputs an activation signal for the first drive unit 11 to the switching valve 15. The first drive unit 11 moves the first valve body 8 toward the valve seat 7D from the operating state shown in Figure 3. After a predetermined time has elapsed since the controller 19 outputs the activation signal for the first drive unit 11, it outputs an activation signal for the second drive unit 12 to the switching valve 16. The second drive unit 12 moves the second valve body 10 toward the valve seat 9D from the operating state shown in Figure 3. In this way, the emergency release structure 2 is changed from the operating state shown in Figure 3 to the operating state shown in Figure 6A. From the operating state shown in Figure 6A, the first drive unit 11 moves the first valve body 8 toward the valve seat 7D, and the first valve body 8 comes into contact with the valve seat 7D. From the operating state shown in Figure 6A, the second drive unit 12 moves the second valve body 10 toward the valve seat 9D. In this way, the emergency release structure 2 is changed from the operating state shown in Figure 6A to the operating state shown in Figure 6B. Furthermore, from the operating state shown in Figure 6B, the second valve body 10 is moved toward the valve seat 9D by the second drive unit 12, and the second valve body 10 comes into contact with the valve seat 9D. In this way, the emergency release structure 2 is changed from the operating state shown in Figure 6B to the operating state shown in Figure 4.

[0030] As shown in Figure 4, in the emergency release structure 2, with the open end face 7C of the first housing 7 and the open end face 9C of the second housing 9 abutting together, the first valve body 8 is in contact with the valve seat 7D and the second valve body 10 is in contact with the valve seat 9D. A space 20 is created between the first valve body 8 and the second valve body 10.

[0031] From the usage state shown in Figure 4, the clamp 13 is removed. The joint 18 is separated into the female joint 18A and the male joint 18B. In this way, the emergency release structure 2 is changed from the usage state shown in Figure 4 to the usage state shown in Figure 5.

[0032] In the emergency release structure 2, with the first housing 7 and the second housing 9 connected, the first valve body 8 abuts against the valve seat 7D of the first housing 7, and the second valve body 10 abuts against the valve seat 9D of the second housing 9. The emergency release structure 2 can close the flow paths 7A and 9A before separating the first housing 7 and the second housing 9. This emergency release structure 2 can reduce the amount of liquefied hydrogen leaked when separating the first housing 7 and the second housing 9.

[0033] As shown in Figure 3, the emergency release structure 2 comprises a first housing 7 and a second housing 9 with a double-tube structure. The first housing 7 and the second housing 9 have an insulating structure. The first housing 7 and the second housing 9 are suitable for transporting liquefied hydrogen at low temperatures.

[0034] In the emergency release structure 2, the controller 19 moves the first valve body 8 to the first drive unit 11 and the second valve body 10 to the second drive unit 12 by staggering the timing of when the first valve body 8 contacts the valve seat 7D and when the second valve body 10 contacts the valve seat 9D. As a result, the emergency release structure 2 can reduce the amount of liquid hydrogen confined in the space 20 compared to when the timing of when the first valve body 8 contacts the valve seat 7D and the timing of when the second valve body 10 contacts the valve seat 9D are the same. This emergency release structure 2 can suppress the rise in pressure of the liquid hydrogen confined in the space 20 by the first valve body 8 and the second valve body 10.

[0035] The emergency release structure 2 makes it easier to bring the first valve body 8 into contact with the valve seat 7D and the second valve body 10 into contact with the valve seat 9D compared to when the timing of bringing the first valve body 8 into contact with the valve seat 7D and the timing of bringing the second valve body 10 into contact with the valve seat 9D are the same. The emergency release structure 2 can reduce the amount of liquid hydrogen leaking from between the open end face 7C of the first housing 7 and the open end face 9C of the second housing 9.

[0036] This emergency release structure 2 moves the first valve body 8 to the valve seat 7D while moving the second valve body 10 to the valve seat 9D. Compared to the case where the first valve body 8 contacts the valve seat 7D and then the second valve body 10 moves toward the valve seat 9D, the emergency release structure 2 can shorten the time that the flow paths 7A and 9A are blocked. Therefore, it is preferable that the first valve body 8 contacts the valve seat 7D of the first housing 7 while the second valve body 10 is moving toward the valve seat 9D of the second housing 9.

[0037] In this emergency release structure 2, the hydraulic circuit 14 is connected in a way that allows the first drive unit 11 to be disconnected while maintaining hydraulic pressure. In the operating state shown in Figure 5, the first drive unit 11 is disconnected from the hydraulic power source. In this emergency release structure 2, the first valve body 8 contacts the valve seat 7D of the first housing 7 before the second valve body 10 contacts the valve seat 9D of the second housing 9. This makes it easier for the first drive unit 11 to maintain the state in which the first valve body 8 contacts the valve seat 7D, even when the first drive unit 11 is disconnected from the hydraulic power source. Therefore, it is preferable that the first valve body 8, which is moved by the first drive unit 11 that is disconnected while maintaining hydraulic pressure, contacts the valve seat 7D before the second valve body 10 contacts the valve seat 9D.

[0038] In the emergency release structure 2, the controller 19 moves the first valve body 8 to the first drive unit 11 and the second valve body 10 to the second drive unit 12 by staggering the timing of when the first valve body 8 contacts the valve seat 7D and when the second valve body 10 contacts the valve seat 9D. Therefore, it is preferable that the controller 19 outputs an operation signal for the first drive unit 11 to move the first valve body 8 toward the valve seat 7D, and after a predetermined time has elapsed, outputs an operation signal for the second drive unit 12 to move the second valve body 10 toward the valve seat 9D.

[0039] This predetermined time varies depending on conditions such as the structure of the emergency release structure 2, the diameter of the flow path, and the fluid being transported, and can be set in advance through testing or other means. An emergency release structure 2 with a short predetermined time can close the flow paths 7A and 9A in a short time. This predetermined time is not particularly limited, but is, for example, 2 seconds or less, and more preferably 1 second or less. On the other hand, an emergency release structure 2 with a long predetermined time can stably suppress the pressure rise in the space 20 between the first valve body 8 and the second valve body 10. This predetermined time is, for example, 0.5 seconds or more.

[0040] Furthermore, the emergency release structure 2 only requires that the timing of contacting the first valve body 8 with the valve seat 7D and the timing of contacting the second valve body 10 with the valve seat 9D be different. The emergency release structure 2 is not limited to the controller 19 outputting an operation signal for the first driver 11, and then outputting an operation signal for the second driver 12 after a predetermined time has elapsed. For example, the controller 19 may output the operation signals for the first driver 11 and the second driver 12 simultaneously, and the movement speed of the first valve body 8 may be faster than the movement speed of the second valve body 10. Also, the movement distance of the first valve body 8 may be shorter than the distance of the second valve body 10.

[0041] Furthermore, in the emergency release structure 2, the first valve body 8 contacts the valve seat 7D before the second valve body 10 contacts the valve seat 9D, but the reverse may also occur. That is, in the emergency release structure 2, the second valve body 10 may contact the valve seat 9D before the first valve body 8 contacts the valve seat 7D.

[0042] In this emergency release structure 2, the first valve body 8 and the first housing 7 seal the passage 7A by bringing the seat surface 8A on the tapered outer surface into contact with the valve seat 7D on the tapered inner surface. The first valve body 8 and the first housing 7 are illustrative examples, and the shape of the seat surface 8A and the shape of the valve seat 7D are not particularly limited, as long as they can seal the passage 7A. Similarly, the shape of the seat surface 10A of the second valve body 10 and the shape of the valve seat 9D of the second housing 9 are not particularly limited, as long as they can seal the passage 9A.

[0043] Figure 7 shows a part of the emergency escape structure 22 according to another embodiment. Here, the configuration of the emergency escape structure 22 that differs from that of the emergency escape structure 2 will be described. The same configuration as that of the emergency escape structure 2 will not be described and will be described using the same reference numerals.

[0044] The emergency release structure 22 comprises a first housing 23 connected to the joint 3 and a first valve body 24 located inside the first housing 23. The emergency release structure 22 also comprises a second housing 25 connected to the movable piping 4 and a second valve body 26 located inside the second housing 25. Furthermore, the emergency release structure 22 includes a clamp 27 connecting the first housing 23 and the second housing 25. In this emergency release structure 22, the first housing 23 is located below the second housing 25 in the vertical direction.

[0045] The first housing 23 has a flow path 23A, an opening 23B of the flow path 23A, an open end face 23C on which the opening 23B is formed, and a valve seat 23D located within the flow path 23A. The valve seat 23D is a stepped inner circumferential surface located within the flow path 23A from the opening 23B.

[0046] The first valve body 24 is located within the flow path 23A of the first housing 23. The first valve body 24 has a stepped outer surface 24A, an end face 24B facing the second valve body 26, and a plurality of sealing materials 24C. The plurality of sealing materials 24C are positioned on the outer surface 24A at intervals from each other.

[0047] The second housing 25 has a flow path 25A, an opening 25B of the flow path 25A, an open end face 25C on which the opening 25B is formed, and a valve seat 25D located within the flow path 25A. The valve seat 25D is a stepped inner circumferential surface located within the flow path 25A from the opening 25B.

[0048] The second valve body 26 is located within the flow path 25A of the second housing 25. The second valve body 26 has a stepped outer surface 26A, an end face 26B facing the first valve body 24, and a plurality of sealing materials 26C. The plurality of sealing materials 26C are positioned on the outer surface 26A at intervals from each other.

[0049] The first housing 23 has an inner pipe 23E and an outer pipe 23F, and has a double-pipe structure with a vacuum between the inner pipe 23E and the outer pipe 23F. This first housing 23 has an insulating structure. The second housing 25 also has an inner pipe 25E and an outer pipe 25F, and has a double-pipe structure with a vacuum between the inner pipe 25E and the outer pipe 25F. This second housing 25 also has an insulating structure.

[0050] The clamp 27 is attached to the first housing 23 and the second housing 25, connecting the first housing 23 and the second housing 25. The clamp 27 clamps the first housing 23 and the second housing 25 with its open end faces 23C and 25C abutting against each other. The clamp 27 is removable from the first housing 23 and the second housing 25. By removing the clamp 27, the first housing 23 and the second housing 25 can be separated.

[0051] In Figure 7, the first drive unit 11 is positioned in a closed position with the first valve body 24 in contact with the valve seat 23D. The second drive unit 12 is also positioned in a closed position with the second valve body 26 in contact with the valve seat 25D. In the operating state shown in Figure 7, the flow paths 23A and 25A are closed. A space 28 is created between the first valve body 24 and the second valve body 26.

[0052] This emergency release structure 22 achieves the same effect as the emergency release structure 2 described above. Furthermore, in the emergency release structure 22, the flow path 23A is closed by multiple sealing materials 24C. The flow path 25A is closed by multiple sealing materials 26C. This emergency release structure 22 has high airtightness of the space 28. In the emergency release structure 22, where a space 28 is created by multiple sealing materials 24C and multiple sealing materials 26C, the effect of suppressing pressure rise is significant.

[0053] [Disclosure items] Each of the following items discloses a preferred embodiment.

[0054] [Item 1] An emergency release structure for a fluid handling device that transports fluids, A first housing having a flow path, an open end face in which an opening of the flow path is formed, and a valve seat located within the flow path, A first valve body located within the flow path of the first housing and in contact with the valve seat of the first housing, closing the opening of the flow path of the first housing, A second housing having a flow path, an open end face in which an opening for the flow path is formed, and a valve seat located within the flow path, A second valve body located within the flow path of the second housing and in contact with the valve seat of the second housing, closing the opening of the flow path of the second housing, A clamp that connects the first housing and the second housing so that they can be separated, with the open end face of the first housing and the open end face of the second housing abutting together and the flow path of the first housing and the flow path of the second housing connected. A first driver that moves the first valve body between a position in contact with the valve seat of the first housing and a position away from the valve seat of the first housing, A second driver that moves the second valve body between a position in contact with the valve seat of the second housing and a position away from the valve seat of the second housing. and A controller that moves the first valve body to the first drive and the second valve body to the second drive by staggering the timing of when the first valve body contacts the valve seat of the first housing and when the second valve body contacts the valve seat of the second housing. An emergency release structure for fluid handling equipment, equipped with the above.

[0055] According to the configuration of item 1, the pressure rise in the space between the first valve body and the second valve body can be suppressed.

[0056] [Item 2] The emergency release structure for a fluid handling device according to item 1, wherein the controller moves the first valve body to the first drive and moves the second valve body to the second drive, such that the first valve body contacts the valve seat of the first housing while the second valve body is moving toward the valve seat of the second housing.

[0057] According to the configuration of item 2, it is possible to suppress the pressure rise in the space between the first valve body and the second valve body while shortening the time the flow path is blocked.

[0058] [Item 3] The first and second drivers are hydraulic drivers, The hydraulic circuit is provided, which is connected to the first drive unit in a way that allows it to be disconnected while maintaining hydraulic pressure, An emergency release structure for a fluid handling device according to item 1 or 2, wherein the controller moves the first valve body to the first drive and the second drive to the second valve body such that the first valve body abuts against the valve seat of the first housing before the second valve body abuts against the valve seat of the second housing.

[0059] According to the configuration in item 3, when the first drive unit is disconnected from the hydraulic power source, the first drive unit can easily maintain a state in which the first valve body is in contact with the valve seat.

[0060] [Item 4] An emergency release structure for a fluid handling device according to any one of items 1 to 3, wherein the controller outputs an operating signal for the first drive unit to move the first valve body toward the valve seat of the first housing, and after a predetermined time has elapsed, outputs an operating signal for the second drive unit to move the second valve body toward the valve seat of the second housing.

[0061] According to the configuration of item 4, the pressure rise in the space between the first housing and the second housing can be suppressed. [Explanation of Symbols]

[0062] 1. Fluid handling equipment 2.22...Emergency escape structure 7, 23... 1st Housing 7A, 9A, 23A, 25A...Flow path 7B, 9B, 23B, 25B...Aperture 7C, 9C, 23C, 25C...Open end surface 7D, 9D, 23D, 25D...valve seat 8, 24...First valve body 9, 25... Second Housing 10, 26... Second valve body 11. First drive unit 12. Second drive unit 13, 27... Clamp 14. Hydraulic Circuit 19. Controller 20, 28...space

Claims

1. An emergency release structure for a fluid handling device that transports fluids, A first housing having a flow path, an open end face in which an opening of the flow path is formed, and a valve seat located within the flow path, A first valve body located within the flow path of the first housing and in contact with the valve seat of the first housing, closing the opening of the flow path of the first housing, A second housing having a flow path, an open end face in which an opening for the flow path is formed, and a valve seat located within the flow path, A second valve body located within the flow path of the second housing and in contact with the valve seat of the second housing, thereby closing the opening of the flow path of the second housing, A clamp that connects the first housing and the second housing so that they can be separated, with the open end face of the first housing and the open end face of the second housing abutting together and the flow path of the first housing and the flow path of the second housing connected. A first driver that moves the first valve body between a position in contact with the valve seat of the first housing and a position away from the valve seat of the first housing. A second driver that moves the second valve body between a position in contact with the valve seat of the second housing and a position away from the valve seat of the second housing, and A controller that moves the first valve body to the first drive and the second valve body to the second drive by staggering the timing of when the first valve body contacts the valve seat of the first housing and when the second valve body contacts the valve seat of the second housing. An emergency release structure for fluid handling equipment, equipped with the above.

2. The emergency release structure for a fluid handling device according to claim 1, wherein the controller moves the first valve body to the first drive and moves the second valve body to the second drive, such that the first valve body contacts the valve seat of the first housing while the second valve body is moving toward the valve seat of the second housing.

3. The first and second drivers are hydraulic drivers, The hydraulic circuit is provided, which is connected to the first drive unit in a way that allows it to be disconnected while maintaining hydraulic pressure, The emergency release structure for a fluid handling device according to claim 1 or 2, wherein the controller moves the first valve body to the first drive and moves the second valve body to the second drive, such that the first valve body abuts against the valve seat of the first housing before the second valve body abuts against the valve seat of the second housing.

4. The emergency release structure for a fluid handling device according to claim 1 or 2, wherein the controller outputs an operating signal for the first drive unit to move the first valve body toward the valve seat of the first housing, and after a predetermined time has elapsed, outputs an operating signal for the second drive unit to move the second valve body toward the valve seat of the second housing.

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