Emergency release device for fluid handling equipment

Abstract

To provide an emergency separation device for a fluid cargo handling device, having a simple constitution that can be manufactured at a low cost, capable of exhibiting an excellent emergency separation performance.SOLUTION: In the emergency separation device for the fluid cargo handling device, a valve body operation mechanism that closes each valve body 1a, 2a of each coupler 1, 2 comprises: a cylinder device 4; a rod 5 connected to the cylinder device 4; and a scotch yoke 7 engaged with the rod 5, provided on a rotation axis 9 of each valve body 1a, 2a. Furthermore, holding means 3 that holds a connected state of each coupler 1, 2 comprises: a pair of holding half bodies 3a, 3b; and an opening operation inhibiting member 8 installed between tip parts of the pair of holding half bodies 3a, 3b, which inhibits an opening operation of the pair of holding half bodies 3a, 3b.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an emergency disengagement device for a fluid handling device.

Background Art

[0002] Fluid handling devices are used for handling various fluids such as liquefied natural gas and liquefied petroleum gas between offshore tankers and onshore storage facilities. Due to unexpected movement of the tanker caused by strong winds, high tides, or tsunamis, etc., there is a possibility that the fluid transfer line may break between the fluid handling devices on the offshore side and the onshore side, and the fluid being transported may flow out externally. Therefore, in many of these fluid handling devices, in order to prevent the occurrence of such problems, in an emergency, the conveyance (flow) of the fluid is quickly blocked to ensure prevention of the fluid from flowing out externally, and then the transfer line is separated into the offshore side and the onshore side respectively, and an emergency disengagement device is provided to reduce the loads applied to each of the offshore and onshore transfer lines.

[0003] By the way, regarding the above emergency disengagement device, the applicant has proposed an emergency disengagement device shown in Patent Document 1 (hereinafter referred to as "conventional example").

[0004] This conventional example, as shown in Figure 7, includes a first coupler 21 having a first valve body 23, a second coupler 22 having a second valve body 24, a coupler coupling mechanism 25 that can freely connect and disconnect the first coupler 21 and the second coupler 22, and a valve closing mechanism that simultaneously closes the first valve body 23 and the second valve body 24, wherein the valve closing mechanism includes a cylinder device 26, a valve body operating rod 27 that moves back and forth by the operation of the cylinder device 26, and a cam mechanism that engages with the valve body operating rod 27 and converts the back and forth movement of the valve body operating rod 27 into a rotational movement that closes the first valve body 23 and the second valve body 24. The valve body operating rod 27 is configured such that in an emergency, the valve closing mechanism closes the first valve body 23 and the second valve body 24, and after the first valve body 23 and the second valve body 24 are closed, the coupler coupling mechanism 25 releases the connection between the first coupler 21 and the second coupler 22, making the first coupler 21 and the second coupler 22 in a state where they can be emergency detached (see Figure 7(b)). Furthermore, the valve body operating rod 27 consists of a first operating rod 27a connected to the cylinder device 26 and a second operating rod that is detachably connected to the first operating rod 27a via a rod coupling means. The system is configured such that the first operating rod 27a and the second operating rod 27b are connected by a rod connecting means while the first valve body 23 and the second valve body 24 are closing, and after the closing operation of the first valve body 23 and the second valve body 24 is completed, the connection between the first operating rod 27a and the second operating rod 27b by the rod connecting means is released by the rod connection release means 28, so that the first operating rod 27a and the second operating rod 27b can be separated (see Figure 7(b)). The rod connecting means is connected to either the first operating rod 27a or the second operating rod 27b. The valve is composed of a locking portion 29 provided on one side, a locking receiving portion 30 provided on the other side, and a locking state holding portion 31 that holds the locking state of the locking portion 29 to the locking receiving portion 30. When the first valve body 23 and the second valve body 24 are in the open state and during the closing operation, the locking state holding portion 31 holds the locking state of the locking portion 29 to the locking receiving portion 30. When the first valve body 23 and the second valve body 24 are in the closed state, the locking state holding portion 31 releases the locking state of the locking portion 29 to the locking receiving portion 30, and the rod coupling release means 28 releases the locking of the locking portion 29 from the locking receiving portion 30.The locking mechanism 29 is released from its engagement with the locking receiver 30, allowing the first operating rod 27a and the second operating rod 27b to be separated. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 6348924 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, the conventional examples described above have the problem of complicated assembly work and high costs during manufacturing due to the complex shapes of the parts constituting the valve closing mechanism and operating rod, as well as the large number of parts.

[0007] The present invention is an improved version of the above-mentioned conventional example, and aims to provide an emergency release device for fluid handling equipment that has a simple structure, can be easily manufactured at low cost, and exhibits emergency release operation performance equivalent to or better than that of the conventional example. [Means for solving the problem]

[0008] The gist of the present invention will be explained with reference to the attached drawings.

[0009] The device comprises a first coupler 1 having a first valve body 1a that blocks the flow of fluid, a second coupler 2 having a second valve body 2a that blocks the flow of fluid and connected to the first coupler 1, a holding means 3 that maintains the connection state between the first coupler 1 and the second coupler 2, and a valve body operating mechanism that opens and closes the first valve body 1a and the second valve body 2a, wherein the operation of the valve body operating mechanism causes the first valve body 1a and the second valve body 2a to be in a closed state. in the case of , the above Holding means 3An emergency release device for a fluid handling device is configured such that the connection between the first coupler 1 and the second coupler 2 is released, and the first coupler 1 and the second coupler 2 are separated for emergency release, wherein the valve body operating mechanism comprises a cylinder device 4 and a mechanism connected to the cylinder device 4, which operates upon the operation of the cylinder device 4. Up and down The valve comprises an operating rod 5 and Scotch yokes 7 provided on the respective rotating shafts 9 of the first valve body 1a and the second valve body 2a, which engage with the rod 5. The rod 5 is provided with an engaging portion 6 that engages with the Scotch yoke 7, and the Scotch yoke 7 is provided with an engaging groove 7a at the other end, which is open. The engaging portion 6 of the rod 5 engages with the engaging groove 7a, and the engaging portion 6 moves within the engaging groove 7a. The aforementioned Scotch yoke 7 times Move, The rotating shaft 9 is configured to rotate, causing the first valve body 1a and the second valve body 2a to open and close, and the holding means 3 is connected to the connecting portion 13 between the first coupler 1 and the second coupler 2. Hold It comprises a pair of retaining halves 3a and 3b, and an opening prevention member 8 that is installed between the tips of the pair of retaining halves 3a and 3b to prevent the opening of the pair of retaining halves 3a and 3b. ,before The configuration is such that when the rod 5 is pushed against the release mechanism preventing member 8, the release mechanism preventing member 8 is released, the pair of retaining halves 3a and 3b are released, and the connection between the first coupler 1 and the second coupler 2 is released. Furthermore, the rod 5 consists of a first rod 5a whose upper end is connected to the cylinder rod 4a of the cylinder device 4 and which has a protrusion 17 at its lower end, and a second rod 5b which has a recess 18 at its upper end that fits with the protrusion 17 and is connected to the first rod 5a by the fitting of the recess 18 and the protrusion 17. When the cylinder rod 4a extends, the first rod 5a moves downward, and the second rod 5b is pushed by the first rod 5a and moves downward, causing the Scotch yoke 7 to rotate, and the first valve body 1a and the second valve body 2a simultaneously The Scotch yoke 7 is configured to be in a closed state, and the Scotch yoke 7 is formed in a substantially U-shape when viewed from the front, and on one end of the engagement groove 7a of the Scotch yoke 7, an engagement receiving surface 7b is provided that engages with the engagement portion 6 in contact with or in close proximity to the first valve body 1a and the second valve body 2a when the valve is open, and on the other end, an engagement receiving surface 7c is provided that engages with the engagement portion 6 in contact with or in close proximity to the first valve body 1a and the second valve body 2a when the valve is closed, and when the first valve body 1a and the second valve body 2a are open, the Scotch The engagement receiving surface 7b provided at one end of the Scotch yoke 7 engages with the engagement portion 6 of the rod 5 in a contact or close proximity, thereby suppressing the rotation of the Scotch yoke 7 and maintaining the open state of the first valve body 1a and the second valve body 2a. Furthermore, when the first valve body 1a and the second valve body 2a are in a closed state, the engagement receiving surface 7c provided at the other end of the Scotch yoke 7 engages with the engagement portion 6 of the rod 5 in a contact or close proximity, thereby suppressing the rotation of the Scotch yoke 7 and maintaining the open state of the first valve body 1a and the second valve body 2a. The valve body 2a is configured to maintain a closed state and further includes a second rod holding means that holds the position of the second rod 5b when it is separated from the first rod 5a. This second rod holding means maintains the position of the second rod 5b when it is separated from the first coupler 1 and the second coupler 2, and the other engagement receiving surface 7c of the Scotch yoke 7 engages with or is in close proximity to the engagement portion 6 of the rod 5, thereby suppressing the rotation of the Scotch yoke 7 and maintaining the closed state of the second valve body 2a. This invention relates to an emergency release device for a fluid handling device, characterized by the following features.

[0010] Furthermore, claims Article 1The present invention relates to an emergency release device for a fluid handling device, wherein the release operation preventing member 8 has a base end that is horizontally rotatable at the tip of one of the retaining halves 3a, and a tip that is detachably engaged with the tip of the other retaining halves 3b, and the rod 5 is positioned inside the release operation preventing member 8 which is installed between the tip of the pair of retaining halves 3a and 3b, and a pushing part 10 is provided on the release operation preventing member 8 side for pushing the release operation preventing member 8, and the pushing action of the pushing part 10 on the release operation preventing member 8 causes the tip of the release operation preventing member 8 to detach from the other retaining halves 3b, causing the pair of retaining halves 3a and 3b to release, thereby releasing the connection between the first coupler 1 and the second coupler 2 held by the retaining means 3.

[0011] Also, An emergency release device for a fluid handling device according to either claim 1 or 2, comprising a positioning mechanism for positioning the abutting connection position of the first coupler 1 and the second coupler 2, wherein the positioning mechanism comprises a one-side positioning part 11 provided on the first coupler 1 and having an insertion rod 11a, and a other-side positioning part 12 provided on the second coupler 2 and having an insertion hole 12a through which the insertion rod 11a is inserted, and the device is configured such that the first coupler 1 and the second coupler 2 abut against each other in a centered state when the insertion rod 11a is inserted into the insertion hole 12a, This relates to the matter. [Effects of the Invention]

[0012] As described above, the present invention provides an emergency release device for fluid handling equipment that is simple in structure, can be easily manufactured at low cost, and exhibits emergency release operation performance equivalent to or better than conventional examples. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing this embodiment. [Figure 2] This is a diagram illustrating the operation of the valve body operating mechanism (a) and each valve body (b) in this embodiment. [Figure 3] This is a diagram illustrating the operation of the valve body operating mechanism (a) and each valve body (b) in this embodiment. [Figure 4] This is a diagram illustrating the operation of the valve body operating mechanism (a) and each valve body (b) in this embodiment. [Figure 5] This is a diagram illustrating the operation of the valve body operating mechanism (a) and each valve body (b) in this embodiment. [Figure 6] This is an explanatory diagram showing the release operation of the clamp lever in this embodiment. [Figure 7] It is an explanatory front view showing the connected state (a) and the separated state (b) of the conventional example.

Mode for Carrying Out the Invention

[0014] Embodiments of the present invention that are considered suitable will be briefly described based on the drawings while showing the operation of the present invention.

[0015] In the case of emergency detachment, the cylinder device 4 operates, and due to the operation of this cylinder device 4, the rod 5 moves. Each engaging portion 6 provided on this rod 5 is respectively connected to the Scotch yoke 7 connected to the rotating shaft 9 of the first valve body 1a and the Scotch yoke 7 connected to the rotating shaft 9 of the second valve body 2a. They are respectively fitted into the engaging grooves 7a of the Scotch yokes 7, and as the rod 5 moves, each engaging portion 6 moves within each engaging groove 7a, causing each Scotch yoke 7 to rotate. Due to the rotational movement of this Scotch yoke 7, the first valve body 1a and the second valve body 2a respectively perform a closing operation. When the first valve body 1a and the second valve body 2a are in the closed state, the engaging portion 6 disengages from the engaging groove 7a, and the rotational movement of the Scotch yoke 7 ends, and the closing operations of the first valve body 1a and the second valve body 2a end.

[0016] After the first valve body 1a and the second valve body 2a are in the closed state, the rod 5 further moves and pushes the release operation blocking member 8 that blocks the release operation of the holding means 3 (pair of holding halves 3a, 3b). Due to the pushing action of this rod 5, the release operation blocking member 8 performs a release operation, and the holding means 3 (pair of holding halves 3a, 3b) performs a release operation, and the holding of the connected state between the first coupler 1 and the second coupler 2 is released.

[0017] In this way, the present invention can smoothly close the first valve body 1a and the second valve body 2a by the operation of a single rod 5 and the Scotch yoke 7. Furthermore, by the operation of this single rod 5, the connected state between the first coupler 1 and the second coupler 2 by the holding means 3 can also be released. It becomes an emergency detachment device for a fluid handling device that has a simple structure, can be easily manufactured at a low cost.

Example

[0018] Specific embodiments of the present invention will be described with reference to the drawings.

[0019] This embodiment describes a fluid handling device (loading arm) used for handling various fluids such as liquefied natural gas and liquefied petroleum gas between a tanker at sea and a storage facility on land. In the event of an emergency such as the unexpected movement of a tanker due to strong winds, storm surges, or tsunamis, which may cause a rupture of the fluid transport line between the fluid handling devices on the sea and land sides, or an unforeseen event such as a fire occurring on either the sea or land side, the device quickly shuts off the fluid transport (flow) to prevent leakage of the fluid to the outside, thereby preventing damage to the arm (piping) and preventing the spread of damage. The device then separates the arm into sea and land sections, reducing the load on each of the sea and land sections. To that end, this is an emergency release device provided in the fluid handling device, comprising a first coupler 1 having a first valve body 1a that shuts off the flow of fluid, a second coupler 2 having a second valve body 2a that shuts off the flow of fluid and connected to the first coupler 1, a holding means 3 that maintains the connected state of the first coupler 1 and the second coupler 2, and a valve body operating mechanism that opens and closes the first valve body 1a and the second valve body 2a, and after the first valve body 1a and the second valve body 2a are closed by the operation of the valve body operating mechanism, the holding of the connected state of the first coupler 1 and the second coupler 2 by the coupler connection holding mechanism is released, and the first coupler 1 and the second coupler 2 are separated and released in an emergency.

[0020] The components of this embodiment will be described in detail below.

[0021] As shown in Figure 1, the first coupler 1 and the second coupler 2 in this embodiment are formed in a cylindrical shape and are arranged vertically with their openings facing each other (in this embodiment, the first coupler 1 is on the upper side and the second coupler 2 is on the lower side), and the connected state is maintained by the holding means 3.

[0022] Furthermore, the first coupler 1 and the second coupler 2 are equipped with a positioning mechanism for aligning (centering) their butt-joint connection positions.

[0023] Specifically, the positioning mechanism consists of a one-side positioning section 11 having an insertion rod 11a provided on the first coupler 1, and a other-side positioning section 12 provided on the second coupler 2 having an insertion hole 12a through which the insertion rod 11a is inserted. The first coupler 1 and the second coupler 2 are configured to abut against each other in a centered state by inserting the insertion rod 11a of the one-side positioning section 11 into the insertion hole 12a of the other-side positioning section 12.

[0024] Furthermore, the retaining means 3 that maintains the connected state between the first coupler 1 and the second coupler 2 comprises a pair of retaining halves 3a and 3b that embrace the connecting portion 13 where the flange portions of the first coupler 1 and the second coupler 2 are connected, and an opening operation preventing member 8 that is installed between the tips of the pair of retaining halves 3a and 3b and prevents the opening operation of the pair of retaining halves 3a and 3b. The opening operation preventing member 8 is released by a rod 5 of the valve body operating mechanism, which will be described later, causing the pair of retaining halves 3a and 3b to open and releasing the connection between the first coupler 1 and the second coupler 2.

[0025] Specifically, in this embodiment, a clamp body 3 consisting of clamp halves 3a and 3b (holding halves 3a and 3b) and a clamp lever 8 (release operation preventing member 8) is used as the holding means 3.

[0026] The clamp halves 3a and 3b are each mounted on a clamp mounting portion 14 provided on the first coupler 1 so as to be able to rotate horizontally, and are configured to move away from the first coupler 1 and the second coupler 2 (from the connecting portion 13 of the first coupler 1 and the second coupler 2) in the event of emergency disconnection.

[0027] Furthermore, the clamp halves 3a and 3b are formed with a straight tip, which reduces the fastening force of the clamp lever 8 that tightens the first coupler 1 and the second coupler 2, and allows the clamp lever 8 to engage and disengage smoothly.

[0028] Furthermore, the clamp halves 3a and 3b are connected to a wire 16 that hangs down from a frame 15 on which a cylinder device 4 is provided, and when the connection between the first coupler 1 and the second coupler 2 is released, the tip ends are suspended from the wire 16, and the downward sagging of the tip ends is suppressed.

[0029] Furthermore, the clamp lever 8 is mounted between the tips of the clamp halves 3a and 3b, with its base end rotatably mounted on the tip of one clamp half 3a and its tip end detachably engaged with the tip of the other clamp half 3b, thereby preventing the release of the clamp halves 3a and 3b.

[0030] As described above, the clamp lever 8 is configured to be released by the rod 5 of the valve body operating mechanism. Specifically, the rod 5 pushes the lever outward, causing its tip to detach from the clamp half 3b, thereby releasing the barrier preventing the opening of the clamp halves 3a and 3b.

[0031] Furthermore, the first valve body 1a provided in the first coupler 1 and the second valve body 2a provided in the second coupler 2 are each provided with a rotating shaft 9, and are configured to open and close when the rotating shaft 9 rotates due to the operation of the valve body operating mechanism described later. In this embodiment, a ball valve (cast type) is used for the valve body as shown in the figure, but other types of valves such as butterfly valves may be used.

[0032] Furthermore, the valve operating mechanism that operates (manipulates) the first valve body 1a and the second valve body 2a consists of a cylinder device 4, a rod 5 connected to the cylinder device 4 and moving forward and backward when the cylinder device 4 is operated, and a Scotch yoke 7 provided on the respective rotation shafts 9 of the first valve body 1a and the second valve body 2a and engaging with the rod 5.

[0033] Specifically, the cylinder device 4 uses a single-rod type hydraulic cylinder device in which the cylinder rod 4a moves back and forth on one side, and is installed on the upper first coupler 1 such that the forward (protruding) direction of the cylinder rod 4a is downward.

[0034] Furthermore, rod 5 is suspended and connected to the tip of cylinder rod 4a, and is configured to move back and forth (up and down) in conjunction with the forward and backward (up and down) movement of cylinder rod 4a.

[0035] Specifically, the rod 5 consists of a first rod 5a connected to the cylinder rod 4a and a second rod 5b that is detachably fitted and connected to the first rod 5a. The configuration is such that when the cylinder rod 4a moves forward, the first rod 5a moves forward, and the second rod 5b is pushed by the first rod 5a and moves forward simultaneously. Furthermore, the configuration is such that the first rod 5a and the second rod 5b automatically separate in conjunction with the detachment operation of the first coupler 1 and the second coupler 2.

[0036] More specifically, in this embodiment, the rod 5 has a protrusion 17 at the tip of the first rod 5a (the lower end portion which connects to the second rod 5b) and a recess 18 at the base end of the second rod 5b (the upper end portion which connects to the first rod 5a). The rods are connected so as to be automatically separable by the interlocking of the protrusion 17 and recess 18. The rod 5 in this embodiment also has a fitting and holding mechanism (not shown) that maintains the interlocking of the protrusion 17 and recess 18. When opening and closing the first valve body 1a and the second valve body 2a for maintenance or the like, the fitting and holding mechanism is configured to make it impossible to separate the first rod 5a and the second rod 5b.

[0037] Furthermore, in this embodiment, the rod 5 is positioned on the inside (coupler side) of the clamp lever 8, which is installed between the tip portions of the clamp halves 3a and 3b, and is located in close proximity to the clamp lever 8. Additionally, a pushing portion 10 is provided on the clamp lever 8 side to push the clamp lever 8 outward.

[0038] Specifically, the pushing part 10 has a sliding inclined surface 10a, and when the rod 5 moves forward, this sliding inclined surface 10a comes into contact with the clamp lever 8 and slides, thereby pushing the clamp lever 8 outward and releasing the clamp lever 8.

[0039] Furthermore, the first rod 5a and the second rod 5b are each provided with an engaging portion 6 that engages with the Scotch yoke 7, which will be described later.

[0040] In this embodiment, the engaging portion 6 is formed in a circular shape (roller shape) so that it can move (slide) smoothly within the engaging groove 7a of the Scotch yoke 7. However, the shape of the engaging portion 6 is not limited to this embodiment.

[0041] Furthermore, the Scotch yoke 7, into which the engaging portion 6 engages, is provided with an engagement groove 7a that is open at the other end. Each engaging portion 6 provided on the rod 5 engages with this engagement groove 7a, and the engaging portion 6 is configured to rotate as it moves within the engagement groove 7a.

[0042] Specifically, as shown in the figure, the Scotch yoke 7 is formed in a roughly U-shape when viewed from the front, and each end is provided with engaging surfaces 7b and 7c that engage with the engaging portion 6 of the rod 5. One engaging surface 7b (the upper engaging surface 7b in this embodiment, hereinafter referred to as the "upper engaging surface 7b") is configured to contact and engage with the engaging portion 6 when the first valve body 1a and the second valve body 2a are in the open state, and the other engaging surface 7c (the lower engaging surface 7c in this embodiment, hereinafter referred to as the "lower engaging surface 7c") is configured to contact and engage with the engaging portion 6 when the first valve body 1a and the second valve body 2a are in the closed state. In this embodiment, "contact engagement" includes a close-proximity engagement state in which the two surfaces are in close proximity and contact is made with only a small movement.

[0043] In other words, this embodiment is configured such that when the first valve body 1a and the second valve body 2a are in the open state, the upper engaging surface 7b of each Scotch yoke 7 abuts and engages with the engaging portion 6 of the rod 5, thereby suppressing the rotational movement of the Scotch yoke 7 and maintaining the open state of the first valve body 1a and the second valve body 2a. Also, when the first valve body 1a and the second valve body 2a are in the closed state, the lower engaging surface 7c of each Scotch yoke 7 abuts and engages with the engaging portion 6 of the rod 5, thereby suppressing the rotational movement of the Scotch yoke 7 and maintaining the closed state of the first valve body 1a and the second valve body 2a.

[0044] The effects and advantages of this embodiment, configured as described above, will be explained based on the operation diagrams shown in Figures 2 to 5.

[0045] Figure 2 shows the state of the valve body operating mechanism in the open state of this embodiment (a) and the state of each valve body, the first valve body 1a and the second valve body 2a (b).

[0046] In this open state, as shown in Figure 2(a), the upper engagement receiving surface 7b of each Scotch yoke 7 abuts and engages with each engagement portion 6 provided on the rod 5. This abutment and engagement suppresses the rotational movement of the Scotch yoke 7 in the closing direction, and the open state of the first valve body 1a and the second valve body 2a is maintained.

[0047] During emergency release, as shown in Figure 3(a), the cylinder device 4 operates, causing the cylinder rod 4a to move forward (extend), and in conjunction with this forward movement of the cylinder rod 4a, the rod 5 moves forward (the first rod 5a is pushed by the cylinder rod 4a, and the second rod 5b is pushed by the first rod 5a and moves downward), releasing the contact engagement between each engagement part 6 and the upper engagement receiving surface 7b of each Scotch yoke 7, allowing each Scotch yoke 7 to rotate, and further forward movement of the rod 5 releases the first rod 5a The engaged portion 6 engages with the engagement groove 7a of the Scotch yoke 7 provided on the rotation shaft 9 of the first valve body 1a, and as it moves while pushing the Scotch yoke 7, the Scotch yoke 7 rotates in the valve closing direction. At the same time, the engaged portion 6 provided on the second rod 5b engages with the engagement groove 7a of the Scotch yoke 7 provided on the rotation shaft 9 of the second valve body 2a, and as it moves while pushing the Scotch yoke 7, the Scotch yoke 7 rotates in the valve closing direction, and as shown in Figure 3(b), the first valve body 1a and the second valve body 2a close simultaneously.

[0048] Furthermore, as the rod 5 moves forward in conjunction with the forward movement of the cylinder rod 4a, the first valve body 1a and the second valve body 2a close, as shown in Figure 4(b). At the same time that the first valve body 1a and the second valve body 2a are closed, each engaging part 6 disengages from the engaging groove 7a of each Scotch yoke 7, releasing the pushing action against the Scotch yoke 7, and the closing action of the first valve body 1a and the second valve body 2a stops. At this time, the lower engaging receiving surface 7c of each Scotch yoke 7 abuts and engages with each engaging part 6, and this abutment and engagement suppresses the rotational movement of the Scotch yoke 7 in the opening direction, thereby maintaining the closed state of the first valve body 1a and the second valve body 2a.

[0049] After the first valve body 1a and the second valve body 2a are closed, the rod 5 moves forward in conjunction with the forward movement of the cylinder rod 4a, causing the sliding inclined surface 10a of the pushing part 10 provided on the rod 5 (the second rod 5b in this embodiment) to come into contact with the clamp lever 8. As the rod 5 moves forward, the sliding inclined surface 10a slides and pushes the clamp lever 8 outward, and as shown in Figure 6, the clamp lever 8 is released by the pushing action of this sliding inclined surface 10a (pushing part 10). As shown in Figure 5(a), each clamp half 3a, 3b opens, the clamp body 3 releases its hold on the connection between the first coupler 1 and the second coupler 2, and the first coupler 1 and the second coupler 2 separate (emergency detachment).

[0050] Furthermore, the second rod 5b, separated from the first rod 5a, maintains its position at the time of separation by a second rod holding means (not shown). As a result, even when the first coupler 1 and the second coupler 2 are separated, the lower engagement receiving surface 7c of each Scotch yoke 7 is in contact with the respective engagement portion 6. This contact and engagement suppresses the rotational movement of the Scotch yoke 7 in the valve-opening direction, thereby maintaining the closed state of the first valve body 1a and the second valve body 2a.

[0051] Thus, this embodiment is a highly practical emergency release device for fluid handling equipment, having a simple configuration consisting of one rod 5 and two Scotch yokes 7, which can be easily manufactured at low cost, while simultaneously and smoothly closing the first valve body 1a and the second valve body 2a. Furthermore, by extending the movement of the rod 5 to close the first valve body 1a and the second valve body 2a, the connection between the first coupler 1 and the second coupler 2 by the clamp body 3 can be continuously released. Moreover, the open and closed states of the first valve body 1a and the second valve body 2a can be maintained by the contact engagement between the engaging portion 6 provided on the rod 5 and the Scotch yoke 7 (upper engaging receiving surface 7b and lower engaging receiving surface 7c).

[0052] It should be noted that the present invention is not limited to this embodiment, and the specific configuration of each constituent element can be designed as appropriate. [Explanation of Symbols]

[0053] 1. First coupler 1a First valve body 2. Second coupler 2a Second valve body 3 Holding means 3a holding half 3b Holding half 4 Cylinder device 4a Cylinder rod 5 rods 5a First rod 5b Second rod 6 Engaging part 7 Scotch York 7a Engagement groove 7b One of the engaging surfaces 7c Other engagement receiving surface 8. Member that prevents opening operation 9 Rotation axis 10 Pushing part 11 One-sided positioning section 11a Insertion rod 12 Other side positioning part 12a Through hole 12a 13 Connecting part 17 Convex part 18 recess

Claims

1. The device comprises a first coupler having a first valve body that blocks the flow of fluid, a second coupler having a second valve body that blocks the flow of fluid and connected to the first coupler, a holding means for maintaining the connection between the first coupler and the second coupler, and a valve body operating mechanism for opening and closing the first valve body and the second valve body, wherein when the first valve body and the second valve body are in a closed state due to the operation of the valve body operating mechanism, the holding means releases the connection between the first coupler and the second coupler, and the first coupler and the second coupler are disconnected for emergency release. An emergency release device for a fluid handling device is configured, wherein the valve body operating mechanism comprises a cylinder device, a rod connected to the cylinder device and moving up and down by the operation of the cylinder device, and Scotch yokes provided on the respective rotation axes of the first valve body and the second valve body and engaging with the rod, the rod is provided with an engaging portion that engages with the Scotch yoke, and the Scotch yoke is provided with an engaging groove at the other end, the engaging portion of the rod engages with the engaging groove, and the Scotch yoke moves within the engaging groove The rotating shaft rotates, causing the first valve body and the second valve body to open and close. The holding means comprises a pair of holding halves that hold the connection between the first coupler and the second coupler, and an opening prevention member that is installed between the tips of the pair of holding halves and prevents the opening of the pair of holding halves. The rod is configured to release the opening prevention member when it is pushed against the opening prevention member, causing the pair of holding halves to open and releasing the connection between the first coupler and the second coupler. The rod consists of a first rod whose upper end is connected to the cylinder rod of the cylinder device and which has a protrusion at its lower end, and a second rod whose upper end has a recess that fits with the protrusion and which is connected to the first rod by the fitting of the recess and the protrusion. The Scotch yoke rotates as the first rod moves downward when the cylinder rod extends and the second rod is pushed downward by the first rod, causing the first valve body and the second valve body to close simultaneously. The Scotch yoke is formed in a substantially U-shape when viewed from the front.The Scotch yoke is provided with an engagement receiving surface on one end of the engagement groove on both sides, which engages with the engagement portion in contact with or in close proximity to the engagement portion when the first valve body and the second valve body are in the open state, and an engagement receiving surface on the other end is provided, which engages with the engagement portion in contact with or in close proximity to the engagement portion when the first valve body and the second valve body are in the closed state. The engagement receiving surface on one end of the Scotch yoke engages with the engagement portion on the rod in contact with or in close proximity to the engagement portion when the first valve body and the second valve body are in the open state, and the engagement receiving surface on one end of the Scotch yoke engages with the engagement portion on the rod in contact with or in close proximity to the engagement portion, thereby suppressing the rotation of the Scotch yoke and maintaining the open state of the first valve body and the second valve body. An emergency release device for a fluid handling apparatus is characterized in that an engaging receiving surface provided at the tip of the rod engages in contact with or is in close proximity to the engaging portion of the rod, thereby suppressing the rotation of the Scotch yoke and maintaining the closed state of the first valve body and the second valve body; further comprising a second rod holding means for maintaining the position of the second rod when separated from the first rod, and this second rod holding means maintains the position of the second rod when separated from the first coupler and the second coupler; and the other engaging receiving surface of the Scotch yoke engages in contact with or is in close proximity to the engaging portion of the rod, thereby suppressing the rotation of the Scotch yoke and maintaining the closed state of the second valve body.

2. An emergency release device for a fluid handling device according to claim 1, wherein the release operation preventing member has a base end that is horizontally rotatable at the tip of one of the holding halves, and a tip that is detachably engaged with the tip of the other holding halves, and the rod is disposed inside the release operation preventing member which is spanned between the tip of the pair of holding halves, and a pushing part is provided on the release operation preventing member side for pushing the release operation preventing member, and the pushing action of the pushing part on the release operation preventing member causes the tip of the release operation preventing member to detach from the other holding halves, causing the pair of holding halves to release, thereby releasing the holding means from maintaining the connection between the first coupler and the second coupler.

3. An emergency release device for a fluid handling device according to either Claim 1 or 2, comprising a positioning mechanism for positioning the abutting connection position of the first coupler and the second coupler, wherein the positioning mechanism comprises a one-side positioning portion provided on the first coupler and having an insertion rod, and a other-side positioning portion provided on the second coupler and having an insertion hole through which the insertion rod is inserted, and is configured such that the first coupler and the second coupler abutting together in a centered state by inserting the insertion rod into the insertion hole.

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