An active separation bidirectional sealing emergency release device for cryogenic fluids

Abstract

The present invention discloses an active separation, bidirectional sealing emergency disengagement device for cryogenic fluids. The device comprises: an upper valve body; a lower valve body; a clamp assembly, wherein the clamp assembly is provided with ice-breaking teeth, and the upper valve body and the lower valve body are tightly connected by the clamp assembly; and a crank connecting rod mechanism connected to the clamp assembly to control the clamp assembly to switch between a locked state and an unlocked state. In the locked state, the clamp assembly tightly clamps the upper valve body and the lower valve body, and the upper valve body and the lower valve body are fixedly connected, so that the upper valve body and the lower valve body are in a conductive state. In the unlocked state, the clamp assembly releases the upper valve body and the lower valve body, and the upper valve body and the lower valve body are separated, so that the upper valve body and the lower valve body are in a sealed state. In the present invention, by providing ice-breaking teeth on the clamp assembly, the upper valve body and the lower valve body can be smoothly separated even in the case of external ice formation.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency release devices, and further relates to an active separation bidirectional sealing emergency release device for cryogenic fluids. Background Art

[0002] When cryogenic fluids are transferred between ships or between ship and shore, the ships are affected by wind, waves and tides, and their positions will constantly change. If the distance between ships or between ship and shore is too large, it will damage equipment such as conveying hoses or loading and unloading arms, causing leakage of the cryogenic fluid. Cryogenic fluids will quickly vaporize when exposed to the atmosphere. Some fluids, such as LNG, are flammable and explosive, posing a huge safety hazard. Therefore, it is necessary to separate the infusion equipment connected between the two ships in advance before any danger occurs. In the event of an emergency such as a fire on board, it is also necessary to immediately stop the loading and unloading of the cryogenic fluid and disconnect the connection between the two ships or between the ship and shore. Currently, there is little content on emergency disconnect devices that actively separate cryogenic fluids. Most of them are suitable for working conditions with normal temperature working fluids or shore-based conveying media, and are difficult to handle when transporting cryogenic working fluids, especially in the case of ice at sea.

[0003] Therefore, it is necessary to design an active separation bidirectional sealing emergency release device for cryogenic fluid to solve the above problems. Summary of the Invention

[0004] In response to the above technical problems, the purpose of the present invention is to provide an active separation bidirectional sealing emergency release device for cryogenic fluids. By arranging ice-breaking teeth on the clamp assembly, the upper valve body and the lower valve body can be smoothly separated even in the case of external icing.

[0005] In order to achieve the above object, the present invention provides an active separation bidirectional sealing emergency release device for cryogenic fluids, comprising:

[0006] an upper valve body, wherein a first valve core assembly is disposed in the upper valve body;

[0007] a lower valve body, wherein a second valve core assembly is disposed in the lower valve body;

[0008] A clamp assembly, wherein the clamp assembly is provided with ice-breaking teeth, and the upper valve body and the lower valve body are tightly connected through the clamp assembly;

[0009] a crank-connecting rod mechanism connected to the hoop assembly to control the hoop assembly to switch between a locked state and an unlocked state;

[0010] In the locked state, the clamp assembly tightly holds the upper valve body and the lower valve body, and the upper valve body is fixedly connected to the lower valve body, so that the upper valve body and the lower valve body are in a conducting state;

[0011] In the unlocked state, the clamp assembly releases the upper valve body and the lower valve body, and the upper valve body is separated from the lower valve body, so that the upper valve body and the lower valve body are in a sealed state.

[0012] In some embodiments, the clamp assembly includes a rotating gear, a clamp bracket and two clamps, the ice-breaking tooth is arranged on the clamp and extends a preset length along the outer circumferential direction of the clamp, one end of the two clamps is respectively hinged to the clamp bracket, the rotating gear is installed on the crank-connecting rod mechanism, and is adapted to engage with the end of the ice-breaking tooth away from the clamp bracket.

[0013] In some embodiments, the crank-connecting rod mechanism includes a pre-tightening bolt, a pre-tightening cylinder, a connecting rod, a square joint, a crank and a safety pin, the connecting rod is inserted into the pre-tightening cylinder and extends out a preset length, and the pre-tightening bolt is adaptively connected to the end of the connecting rod; the rotating gear is arranged on the connecting rod and is located at the end of the pre-tightening cylinder away from the pre-tightening bolt; the square joint is connected to the end of the connecting rod away from the pre-tightening bolt, and the other end of the square joint is detachably connected to one end of the crank, and the end of the crank close to the square joint is connected to the clamp assembly; a safety pin is provided on the crank, and the safety pin is connected to the clamp.

[0014] In some embodiments, a pre-tightening spring and a pressure plate are provided in the pre-tightening cylinder to pre-tighten the clamp when it is tightened.

[0015] And / or, a visual slot is formed on the pre-tightening cylinder, and the visual slot is used to confirm the compression amount of the spring in the pre-tightening cylinder when tightening the pre-tightening bolt to ensure the tightening force when the device is tightened;

[0016] And / or, a marking line is provided on the connecting rod, and the marking line is used to confirm whether the pre-tightening of the pre-tightening bolt is in place.

[0017] In some embodiments, further comprising:

[0018] A drive assembly, comprising a drive mechanism and a push rod, wherein the drive mechanism is fixed to the outside of the clamp, a drive end of the drive mechanism is fixedly connected to the push rod, and an end of the push rod away from the drive mechanism is connected to an end of the crank away from the square joint;

[0019] The driving mechanism drives the push rod to extend to break the safety pin, and the push rod continues to extend until the crank is disconnected from the square joint, and the two clamps are respectively expanded to both sides, so that the upper valve body is separated from the lower valve body.

[0020] In some embodiments, a first sealing ring and a second sealing ring are provided between the upper valve body and the lower valve body, so that the upper valve body and the lower valve body are tightly connected by a clamp.

[0021] In some embodiments, the upper valve body includes a first upper valve half and a second upper valve half, and a third sealing ring and a fourth sealing ring are provided between the first upper valve half and the second upper valve half, so that the first upper valve half and the second upper valve half are sealed and connected via a plurality of first bolts;

[0022] And / or, the lower valve body includes a first lower half valve and a second lower half valve, and a third sealing ring and a fourth sealing ring are arranged between the first lower half valve and the second lower half valve, so that the first lower half valve and the second lower half valve are sealed and connected via a plurality of first bolts.

[0023] In some embodiments, the first valve core assembly includes a first valve core, a first valve stem, and a first spring. The first valve core is connected to the first positioning fork of the upper valve body via the first valve stem. The first valve core is provided with a fifth sealing ring and a sixth sealing ring. The fifth sealing ring is fixed to the first valve core via a second bolt, and the sixth sealing ring is fixed to the first valve core via a third bolt.

[0024] And / or, the second valve core assembly includes a second valve core, a second valve stem and a second spring, the second valve core is connected to the second positioning fork of the lower valve body through the second valve stem, the second valve core is provided with a seventh sealing ring and an eighth sealing ring, the seventh sealing ring is fixed to the second valve core via a fourth bolt, and the eighth sealing ring is fixed to the second valve core via a fourth bolt.

[0025] In some embodiments, the upper valve body and the lower valve body are symmetrically arranged;

[0026] And / or, the first valve core assembly and the second valve core assembly are symmetrically arranged.

[0027] In some embodiments, the cross-sections of the clamps that hold the upper valve body and the lower valve body are both wedge-shaped;

[0028] And / or, the first valve core is provided with a first chamfer along the circumference, and the first chamfer is used to reduce the flow resistance during the fluid delivery process;

[0029] And / or, the second valve core is provided with a second chamfer along the circumferential direction, and the second chamfer is used to reduce the flow resistance during the fluid delivery process.

[0030] Compared with the prior art, the active separation bidirectional sealing emergency release device for cryogenic fluids provided by the present invention has the following beneficial effects:

[0031] 1. The active separation, bidirectional sealing emergency release device for cryogenic fluids provided by the present invention has ice-breaking teeth provided on the clamp assembly. This can cope with ice formation on the device surface during cryogenic fluid transportation, especially in sea conditions, and ensures that the emergency release device can be separated smoothly in an emergency.

[0032] 2. The active separation bidirectional sealing emergency disconnect device for cryogenic fluids provided by the present invention is provided with multiple sealing rings to ensure that no leakage occurs when the two halves of the emergency disconnect device are not connected and when the connector is separated during cryogenic fluid transportation;

[0033] 3. The active separation bidirectional sealing emergency disengagement device for cryogenic fluids provided by the present invention has an anti-accidental touch function by providing a safety pin, thereby improving the safety and reliability of the device; and by providing a spline chamfer on the valve core, the flow resistance of the flow channel is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0035] Figure 1 1. It is a structural schematic diagram of an active separation bidirectional sealing emergency release device for cryogenic fluids according to a preferred embodiment of the present invention;

[0036] Figure 2 1. It is a left side view of an active separation bidirectional sealing emergency release device for cryogenic fluids according to a preferred embodiment of the present invention;

[0037] Figure 3 It is a cross-sectional view of an active separation bidirectional sealing emergency release device for cryogenic fluids according to a preferred embodiment of the present invention.

[0038] Description of Figure Numbers:

[0039] Upper valve body 1, first upper half valve 11, second upper half valve 12, first bolt 13, positioning fork 14, third sealing ring 15, safety bolt 16, fourth sealing ring 17, lower valve body 2, first lower half valve 21, second lower half valve 22, first sealing ring 23, second sealing ring 24, valve core assembly 3, valve core 31, valve stem 32, spring 33, fifth sealing ring 34, sixth sealing ring 35, second bolt 36, third bolt 37, clamp assembly 4, rotating gear 41, ice-breaking tooth 42, clamp 43, clamp bracket 44, drive assembly 5, drive mechanism 51, push rod 52, crank-connecting rod mechanism 6, pre-tightening bolt 61, pre-tightening cylinder 62, connecting rod 63, square joint 64, crank 65, safety pin 66. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0041] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0042] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0043] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0044] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] In one embodiment, the reference Figures 1 to 3 The present invention provides an active separation, bidirectional sealing, emergency release device for cryogenic fluids, comprising: an upper valve body 1, a lower valve body 2, a clamp assembly 4, and a crank-connecting rod mechanism 6. A first valve core assembly is provided in the upper valve body 1, a second valve core assembly is provided in the lower valve body 2, and ice-breaking teeth 42 are provided on the clamp assembly 4. The upper valve body 1 and the lower valve body 2 are tightly connected via the clamp assembly 4. The crank-connecting rod mechanism 6 is connected to the clamp assembly 4 to control the clamp assembly 4 to switch between a locked state and an unlocked state. In the locked state, the clamp assembly 4 clamps the upper valve body 1 and the lower valve body 2, and the upper valve body 1 and the lower valve body 2 are fixedly connected, so that the upper valve body 1 and the lower valve body 2 are in a conductive state. In the unlocked state, the clamp assembly 4 releases the upper valve body 1 and the lower valve body 2, and the upper valve body 1 and the lower valve body 2 are separated, so that the upper valve body 1 and the lower valve body 2 are in a sealed state.

[0046] In this embodiment, an active separation bidirectional sealing emergency release device for cryogenic fluid is provided with ice-breaking teeth 42 on the clamp assembly 4, which can cope with the ice formation on the surface of the device during the transportation of cryogenic fluid, especially in sea conditions, and ensure that the emergency release device is smoothly separated in an emergency.

[0047] In one embodiment, the reference Figures 1 to 3 The clamp assembly 4 includes a rotating gear 41, a clamp bracket 44, and two clamps 43. The clamps 43 are semicircular in structure. Ice-breaking teeth 42 are mounted on the clamps 43 and extend along the outer circumference of the clamps 43 by a predetermined length. One end of each clamp 43 is hinged to the clamp bracket 44. The rotating gear 41 is mounted on the crank-connecting rod mechanism 6 and engages with the end of the ice-breaking teeth 42 away from the clamp bracket 44.

[0048] The crank-connecting rod mechanism 6 includes a preload bolt 61, a preload cylinder 62, a connecting rod 63, a square joint 64, a crank 65, and a safety pin 66. The connecting rod 63 is inserted into the preload cylinder 62 and extends to a preset length. The preload bolt 61 is adaptively connected to the end of the connecting rod 63. The rotating gear 41 is provided on the connecting rod 63 and is located at the end of the preload cylinder 62 away from the preload bolt 61. The square joint 64 is connected to the end of the connecting rod 63 away from the preload bolt 61. The other end of the square joint 64 is detachably connected to one end of the crank 65. The end of the crank 65 near the square joint 64 is connected to the clamp assembly 4. A safety pin 66 is provided on the crank 65 and is detachably connected to the clamp 43. The safety pin 66 can be removed during the disengagement test to prevent shearing and is installed during normal operation to prevent accidental contact and disengagement.

[0049] Furthermore, the active bidirectional seal emergency release device for cryogenic fluids further includes a drive assembly 5, comprising a drive mechanism 51 and a push rod 52. The drive mechanism 51 is fixed to the outside of the clamp 43. The drive end of the drive mechanism 51 is fixedly connected to the push rod 52. The end of the push rod 52 distal to the drive mechanism 51 is connected to the end of the crank 65 distal to the square joint 64. The drive mechanism 51 drives the push rod 52 to extend, breaking the safety pin 66. The push rod 52 continues to extend until the crank 65 is disconnected from the square joint 64. The two clamps 43 then expand to the sides, separating the upper valve body 1 from the lower valve body 2. The drive mechanism 51 can be a pneumatic cylinder, a hydraulic cylinder, or a motor. For example, if the drive mechanism 51 is a pneumatic cylinder, it has an exhaust port and an air filling port to facilitate medium displacement and piston reset. By providing the drive assembly 5 to assist the crank-connecting rod mechanism 6, ice breaking can be performed before the upper valve body 1 and the lower valve body 2 separate.

[0050] Preferably, a pre-tightening spring and a pressure plate are provided in the pre-tightening cylinder 62 to pre-tighten the clamp 43 when it is tightened.

[0051] And / or, a visual slot is provided on the pre-tightening cylinder 62, and the visual slot is used to confirm the spring compression amount in the pre-tightening cylinder 62 when tightening the pre-tightening bolt 61 to ensure the clamping force when the device is clamped;

[0052] And / or, a marking line is provided on the connecting rod 63, and the marking line is used to confirm whether the pre-tightening bolt 61 is pre-tightened in place.

[0053] In one embodiment, the reference Figures 1 to 3 A first sealing ring 23 and a second sealing ring 24 are disposed between the upper valve body 1 and the lower valve body 2, tightly connecting the upper valve body 1 and the lower valve body 2 via a clamp. The upper valve body 1 includes a first upper valve half 11 and a second upper valve half 12. A third sealing ring 15 and a fourth sealing ring 17 are disposed between the first and second upper valve half 11 and 12, sealingly connecting the first and second upper valve half 11 and 12 via a plurality of first bolts 13. The lower valve body 2 includes a first lower valve half 21 and a second lower valve half 22. A ninth sealing ring and a tenth sealing ring are disposed between the first and second lower valve half 21 and 22, sealingly connecting the first and second lower valve half 21 and 22 via a plurality of bolts. The first valve core assembly includes a first valve core, a first valve stem, and a first spring. The first valve core is connected to the first retaining fork of the upper valve body via the first valve stem. The first valve core is equipped with a fifth sealing ring 34 and a sixth sealing ring 35. The fifth sealing ring 34 is secured to the first valve core via a second bolt 36, and the sixth sealing ring 35 is secured to the first valve core via a third bolt 37. The second valve core assembly includes a second valve core, a second valve stem, and a second spring. The second valve core is connected to the second retaining fork of the lower valve body via the second valve stem. The second valve core is equipped with a seventh sealing ring and an eighth sealing ring. The seventh sealing ring is secured to the second valve core via a fourth bolt, and the eighth sealing ring is secured to the second valve core via a fifth bolt. Both the upper valve body 1 and the lower valve body 2 are detachable, facilitating maintenance and seal replacement. Both the upper valve body 1 and the lower valve body 2 are made of 316L low-temperature-resistant stainless steel, which offers low-temperature resistance, high strength, and a reliable structure. Standard safety margins are incorporated into the structural design to ensure reliability. The stoppers between the upper valve body 1 and the lower valve body 2 are positioned and matched, and two sealing rings are provided to ensure that the emergency release device is leak-free when working under low temperature conditions.

[0054] Preferably, the upper valve body 1 and the lower valve body 2 are symmetrically arranged, and the cross-sections of the clamp assembly 4 that clamp the upper valve body 1 and the lower valve body 2 are both wedge-shaped, which can ensure that the clamp assembly clamps tighter and tighter. Of course, the cross-sections of the clamp assembly 4 that clamp the upper valve body 1 and the lower valve body 2 can also be other shapes, as long as the structure can achieve a tight clamping. The first valve core assembly and the second valve core assembly are similar in structure and symmetrically arranged, both of which are valve core assemblies 3. Among them, the valve core assembly 3 includes a valve core 31, a valve stem 32 and a spring 33. The valve core 31 is connected to the positioning fork 14 of the upper valve body 1 through the valve stem 32. The valve core 31 is provided with a fifth sealing ring 34 and a sixth sealing ring 35. The fifth sealing ring 34 is fixed to the valve core 31 by a second bolt 36, and the sixth sealing ring 35 is fixed to the valve core 31 by a third bolt 37.

[0055] It should be noted that any of the various sealing rings described in this application can be used as long as they can achieve the sealing function. The Variseal ring is preferred. The Variseal ring is a high-performance seal with a U-shaped Teflon seal containing a special spring. Appropriate spring force combined with system fluid pressure pushes the sealing lip (surface) outward and gently presses against the metal surface being sealed, producing an exceptionally effective seal. The spring's actuation overcomes slight eccentricity in the metal mating surfaces and wear on the sealing lip, maintaining the desired sealing performance. The presence of multiple Variseal rings ensures that the two halves of the emergency disconnect device are leak-free when disconnected and when the connector is separated during cryogenic fluid delivery. This seal is suitable for low-temperature environments and has proven low-temperature sealing applications and stable performance.

[0056] Furthermore, the valve core 31 is provided with a spline chamfer along the circumferential direction, and the spline chamfer is used to reduce the flow resistance during the fluid transportation process.

[0057] This embodiment is suitable for cryogenic fluid delivery systems with diameters from DN25 to DN200. The active, bidirectional, sealed emergency release device for cryogenic fluid separation is equipped with ice-breaking teeth 42. When the clamp 43 is separated, the ice-breaking teeth 42 slightly break the ice, allowing the clamp 43 to separate smoothly, preventing separation due to freezing. The power unit applies pressure to the drive mechanism 51, which extends the push rod 52, which pushes the crank 65 and shears the safety pin 66. After the safety pin 66 is sheared, the push rod 52 continues to push the crank 65 past the locking point, releasing the square connector 64 from the crank 65. The left and right restraints on the clamp 43 are released, allowing it to open to the sides. The connecting rod 63 is no longer axially constrained, and the spring in the preload cylinder 62 extends to the sides. The combined action of the spring in the preload cylinder 62 and the springs 33 on both sides of the valve core 31 causes the clamp 43 to separate instantly, disengaging the emergency release device. The valve cores 31 within the upper and lower valve bodies 1 and 2 are pushed toward the center by springs 33 on either side. The springs 33 act to close the flow path, preventing leakage of the cryogenic fluid. Two circumferential sealing rings are installed between each valve core 31 and the valve body.

[0058] In this embodiment, when testing the separation function of the clamp and the control system, it is necessary to tighten the safety bolt 16, and then remove the safety pin 66 to avoid shearing and then perform various functional tests. After separation, the upper valve body 1 and the lower valve body 2 need to be connected with a number of safety bolts 16 evenly arranged along the circumference before resetting. Loosen the pre-tightening bolt 61 so that the square joint 64 can move freely in the axial direction. Reset the push rod 52 and the crank 65 through the drive mechanism 51. Buckle the square joint 64 on the crank 65, tighten the pre-tightening bolt 61 to the preset fixed position, and after the clamp is tightened again, remove the several safety bolts 16 connecting the upper valve body 1 and the lower valve body 2, and install the safety pin 66. The emergency disengagement device is reset.

[0059] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0060] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An active separation bidirectional sealing emergency release device for cryogenic fluids, characterized in that: include: an upper valve body, wherein a first valve core assembly is disposed in the upper valve body; a lower valve body, wherein a second valve core assembly is disposed in the lower valve body; A clamp assembly, wherein the clamp assembly is provided with ice-breaking teeth, and the upper valve body and the lower valve body are tightly connected through the clamp assembly; a crank-connecting rod mechanism connected to the hoop assembly to control the hoop assembly to switch between a locked state and an unlocked state; In the locked state, the clamp assembly tightly holds the upper valve body and the lower valve body, and the upper valve body is fixedly connected to the lower valve body, so that the upper valve body and the lower valve body are in a conducting state; In the unlocked state, the clamp assembly releases the upper valve body and the lower valve body, and the upper valve body is separated from the lower valve body, so that the upper valve body and the lower valve body are in a sealed state; The hoop assembly includes a rotating gear, a hoop bracket, and two hoop brackets. The ice-breaking teeth are provided on the hoop brackets and extend a preset length along the outer circumferential direction of the hoop brackets. One end of the two hoop brackets is hinged to the hoop brackets respectively. The rotating gear is mounted on the crank-connecting rod mechanism and is adapted to mesh with the end of the ice-breaking teeth away from the hoop brackets. The crank-connecting rod mechanism includes a pre-tightening bolt, a pre-tightening cylinder, a connecting rod, a square joint, a crank and a safety pin. The connecting rod is inserted into the pre-tightening cylinder and extends out a preset length. The pre-tightening bolt is adaptively connected to the end of the connecting rod; the rotating gear is arranged on the connecting rod and is located at the end of the pre-tightening cylinder away from the pre-tightening bolt; the square joint is connected to the end of the connecting rod away from the pre-tightening bolt, and the other end of the square joint is detachably connected to one end of the crank, and the end of the crank close to the square joint is connected to the clamp assembly.

2. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 1, characterized in that: A safety pin is provided on the crank, and the safety pin is connected to the clamp.

3. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 2, characterized in that: A pre-tightening spring and a pressure plate are provided in the pre-tightening cylinder to pre-tighten the clamp when it is tightened. And / or, a visual slot is formed on the pre-tightening cylinder, and the visual slot is used to confirm the compression amount of the spring in the pre-tightening cylinder when tightening the pre-tightening bolt to ensure the tightening force when the device is tightened; And / or, a marking line is provided on the connecting rod, and the marking line is used to confirm whether the pre-tightening of the pre-tightening bolt is in place.

4. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 2, characterized in that: Also includes: A drive assembly, comprising a drive mechanism and a push rod, wherein the drive mechanism is fixed to the outside of the clamp, a drive end of the drive mechanism is fixedly connected to the push rod, and an end of the push rod away from the drive mechanism is connected to an end of the crank away from the square joint; The driving mechanism drives the push rod to extend to break the safety pin, and the push rod continues to extend until the crank is disconnected from the square joint, and the two clamps are respectively expanded to both sides, so that the upper valve body is separated from the lower valve body.

5. The active separation bidirectional sealing emergency release device for cryogenic fluid according to any one of claims 1 to 4, characterized in that: A first sealing ring and a second sealing ring are provided between the upper valve body and the lower valve body, so that the upper valve body and the lower valve body are tightly connected through a clamp.

6. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 5, characterized in that: The upper valve body includes a first upper valve half and a second upper valve half, a third sealing ring and a fourth sealing ring are provided between the first upper valve half and the second upper valve half, so that the first upper valve half and the second upper valve half are sealed and connected via a plurality of first bolts; And / or, the lower valve body includes a first lower half valve and a second lower half valve, and a third sealing ring and a fourth sealing ring are arranged between the first lower half valve and the second lower half valve, so that the first lower half valve and the second lower half valve are sealed and connected via a plurality of first bolts.

7. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 6, characterized in that: The first valve core assembly includes a first valve core, a first valve stem, and a first spring. The first valve core is connected to the first positioning fork of the upper valve body via the first valve stem. The first valve core is provided with a fifth sealing ring and a sixth sealing ring. The fifth sealing ring is fixed to the first valve core via a second bolt, and the sixth sealing ring is fixed to the first valve core via a third bolt. And / or, the second valve core assembly includes a second valve core, a second valve stem and a second spring, the second valve core is connected to the second positioning fork of the lower valve body through the second valve stem, the second valve core is provided with a seventh sealing ring and an eighth sealing ring, the seventh sealing ring is fixed to the second valve core via a fourth bolt, and the eighth sealing ring is fixed to the second valve core via a fourth bolt.

8. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 7, characterized in that: The upper valve body and the lower valve body are symmetrically arranged; And / or, the first valve core assembly and the second valve core assembly are symmetrically arranged.

9. The active separation bidirectional sealing emergency release device for cryogenic fluid according to claim 8, characterized in that: The cross-sections of the clamps that tightly hold the upper valve body and the lower valve body are both wedge-shaped; And / or, the first valve core is provided with a first chamfer along the circumference, and the first chamfer is used to reduce the flow resistance during the fluid delivery process; And / or, the second valve core is provided with a second chamfer along the circumferential direction, and the second chamfer is used to reduce the flow resistance during the fluid delivery process.

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