Active emergency release device suitable for ultra-low temperature hose delivery

Abstract

This invention discloses an active emergency release device suitable for cryogenic hose delivery, comprising a valve body, a hydraulic drive mechanism, and a clamping mechanism. The hydraulic drive mechanism includes a hydraulic cylinder, a hydraulic rod, and a connecting component. During the hydraulic delivery phase, the hydraulic cylinder drives the hydraulic rod to extend, and the connecting component and the clamping mechanism make contact. During the emergency release phase, the hydraulic cylinder retracts the hydraulic rod, causing the connecting component to disengage and opening the clamping mechanism. A hot oil circulation mechanism is fixed on the hydraulic drive mechanism, providing hot oil to the hydraulic drive mechanism and forming multiple loops with the hydraulic drive mechanism, allowing hot oil to circulate between the various components of the hydraulic drive mechanism. The contact area between the clamping mechanism and the hydraulic drive mechanism will not freeze and stick. When the hydraulic drive mechanism opens the clamping mechanism, the valve body is quickly released. This invention solves the problem of ice formation and sticking between the drive components and the clamping mechanism at cryogenic temperatures, causing the device to be unable to detach or to detach improperly.

Description

TECHNICAL FIELD

[0001] The present application relates to an active emergency disengaging device, in particular to an active emergency disengaging device suitable for ultra-low temperature hose conveying. BACKGROUND

[0002] The hose conveying system is the main type of ship-to-ship conveying over the barge, among which the emergency disengaging device is an important part of the hose conveying system and also a safety protection system of the hose conveying system, which can realize the safe separation of the ship-to-ship hose conveying passage in an emergency. At present, the conveying medium of the hose conveying system is mainly ultra-low temperature fluid such as LNG, and the medium temperature can be as low as minus 160 degrees Celsius, accompanied by flammable and explosive hazardous properties. The damage caused by ultra-low temperature medium to personnel and equipment needs to be prevented. The emergency disengaging device of the foreign hose conveying system is mostly of the pull-off valve type, which relies on external force to passively realize emergency disengagement. Due to uncontrollable factors such as icing, the pull-off force required for the design of the pull-off valve is unstable, which affects the safety in use. The opening mode of the active emergency disengaging device is mostly pneumatic, but due to the compressibility of gas, the pneumatic of the pneumatic type emergency disengaging device is unstable. The foreign hydraulic type emergency disengaging device mainly includes ball valve type and butterfly valve type, which are mostly arranged longitudinally, and the driving mode is mostly hydraulic push-out to realize disengagement. The ball valve type emergency disengaging device can realize full-bore conveying, but the size is large and the weight is heavy. The embedded butterfly valve type emergency disengaging device has small size and light weight, but the internal flow resistance is large and the pressure drop is large. In addition, due to the limitation of the layout space on the ship, there are special requirements for the size and weight of the emergency disengaging device. Therefore, the ball valve type emergency disengaging device is not suitable for the ship-to-ship hose conveying system on the sea. Therefore, it is necessary to design an emergency disengaging device which can adapt to the installation mode of the ship body, can ensure normal conveying of the medium under ultra-low temperature conveying conditions, and can actively disengage without leakage, and at the same time requires small internal flow resistance and pressure drop. SUMMARY

[0003] The purpose of the present application is to provide an emergency disengaging device suitable for ultra-low temperature hose conveying, which solves the problem of icing and adhesion of the driving part and the clamp contact position under ultra-low temperature, causing the device to be unable to disengage or disengage.

[0004] The technical solution for achieving the object of the application is: an active emergency release device suitable for ultra-low temperature hose conveying, which is installed transversely to adapt to the ship body layout and is convenient to connect with the ship flange, and mainly comprises a low temperature valve body, a driving mechanism, a hot oil circulation mechanism and a clamp mechanism, wherein the low temperature valve body adopts a top-to-top structure inside and is a medium conveying passage, and is also an installation base for the driving mechanism, the hot oil circulation mechanism and the clamp mechanism; the driving mechanism adopts a hydraulic active driving mode to provide a power source for the emergency release of the device; the clamp mechanism is an execution mechanism for clamping or releasing the low temperature valve body to realize normal conveying and emergency release of the device; the hot oil circulation mechanism is a supplement to the driving mechanism, and the hot oil is used as a driving source and circulates in the driving components to prevent the clamp mechanism and the driving components from being frozen and adhered to cause poor or incomplete release.

[0005] Further, the low temperature valve body is a double butterfly valve type, which is composed of a fixed end butterfly valve and a release end butterfly valve, wherein the fixed end butterfly valve is designed with a base for installing the driving mechanism and a base for installing the clamp mechanism; the two butt joint ends of the low temperature valve body are designed with tapered flow-through holes as a medium conveying passage and a sealing structure, and the two distal ends are respectively designed with three top-to-top mounting seats for fixing the top-to-top bases.

[0006] Further, the top-to-top rod inside the butterfly valve adopts a top-to-top structure design with umbrella-shaped flow-through faces at two ends, and a sealing ring groove is designed on the umbrella-shaped flow-through face to ensure smooth medium operation and good flow state, and to reduce flow resistance and water hammer pressure; meanwhile, the umbrella body structure of the two end top-to-top rods is designed with top-to-top pins at the front ends, which are directly acted on during the installation and separation of the double butterfly valve, and the top-to-top pins are in an extended state at the end face of the valve body in a normal state; the umbrella handle of the top-to-top rod is wound with a low temperature spring, and the spring is provided with inner and outer limit blocks and is installed in the top-to-top base, one end of the spring is clamped into the groove of the inner and outer limit blocks, and the other end is used to support the umbrella body structure, and the umbrella handle is inserted into the inner and outer limit blocks and the top-to-top base. During the installation of the double butterfly valve, the two top-to-top pins of the two end top-to-top rods inside the low temperature valve body are mutually acted on and pressed after the two butt joint ends of the low temperature valve body are overlapped, the spring is compressed, the two end umbrella-shaped flow-through faces of the top-to-top rod are separated from the tapered flow-through holes of the low temperature valve body, and the umbrella-shaped conveying passage is opened; during the separation of the double butterfly valve, the two end top-to-top pins lose the mutual pressing action after the two butt joint ends of the low temperature valve body are separated, the umbrella body structure is extended under the action of the spring reset force, the two end umbrella-shaped flow-through faces are respectively contacted with the tapered flow-through holes and sealed, and the separation without leakage is completed.

[0007] Further, the driving mechanism is composed of a hydraulic cylinder, a hydraulic rod, a driving mechanism base plate, an extrusion nut, a breakaway screw, a blocking block, a hot oil clamp block and a rain cover. The hydraulic cylinder body is connected to the driving mechanism base plate by a screw and is fixed to the fixed end butterfly valve driving mounting seat. The driving mechanism base plate can insulate the ultra-low temperature transmitted by the low temperature valve body to a certain extent. The hydraulic rod is in the initial state of being fully extended, penetrates through the hot oil clamp block, and the front end is installed with the extrusion nut. The blocking block is placed at the front end of the hot oil clamp block and is pre-tightened by the breakaway screw. The front end of the hot oil clamp block is symmetrically designed with wedge-shaped separation blocks for assisting in separating the hoop mechanism. Two limiting holes are designed in the middle for cooperating with the blocking block to limit the hoop mechanism. The rear end is designed with a hot oil passage for circulating hot oil to prevent icing at the limiting hole. In the emergency separation state, the hydraulic rod can be actively retracted. The extrusion nut contacts and extrudes the front end of the hot oil clamp block to damage the breakaway screw. The hoop mechanism is separated from the limiting hole and is opened under the action of the wedge-shaped separation blocks at the front end of the hot oil clamp block to achieve active separation.

[0008] Further, the connecting section of the hydraulic cylinder and the hydraulic rod is provided with a rain cover. The rain cover can protect the hydraulic rod and prevent rainwater and sundries from entering the hydraulic cylinder body along with the hydraulic rod.

[0009] Further, the hot oil circulating mechanism is composed of two quick connectors (the first and second quick connectors), an oil pipe and a quick connector mounting plate. The hot oil circulating mechanism is a supplement to the driving mechanism and is complementary to the driving mechanism. The hot oil circulating mechanism is used to prevent the temperature of the hot oil clamp block from being too low due to heat transmission of the valve body during transportation. The contact part of the hoop mechanism and the hot oil clamp block is frozen and adhered due to the too low temperature, which causes the hoop mechanism to be unable to separate or to separate abnormally. The quick connector is the inlet and outlet of the hot oil and is fixed to the quick connector mounting plate. The quick connector mounting plate is fixed to the fixed end butterfly valve driving mounting seat by a screw. The oil pipe connects the quick connector, the hydraulic cylinder, the hot oil clamp block and the quick connector to form a hot oil circuit. In the normal transportation stage, the heated hydraulic oil enters the rodless cavity of the hydraulic cylinder through the first quick connector. The oil drives the hydraulic rod to extend and flows to the rod cavity of the hydraulic cylinder through the one-way valve block in the hydraulic cylinder and then enters the hot oil clamp block through the oil pipe to heat the hot oil clamp block and prevent icing. The oil flows back to the second quick connector through the oil pipe after passing through the hot oil passage of the hot oil clamp block. In the emergency separation stage, the inlet and outlet of the two quick connectors are interchanged. The heated hydraulic oil enters the rod cavity of the hydraulic cylinder through the second quick connector and the hot oil clamp block. Due to the action of the one-way valve, the oil can only drive the hydraulic rod to retract in the rod cavity of the hydraulic cylinder. The oil flows back to the first quick connector through the oil pipe.

[0010] Further, the clamp mechanism is composed of left and right clamps, clamp support mounting plate, clamp connecting plate, bakelite, clamp support mounting plate pin shaft, locking pin shaft, locking nut and screw, connecting sleeve, etc., wherein the left and right clamps are internally provided with a tapered groove for fitting and clamping the double butterfly valve low-temperature valve body, and the top part has a clamp mounting end in a cylindrical shape matched with the hot oil clamp block limiting hole to limit and clamp the clamp mounting end; the left and right clamps are respectively provided with lifting lugs for lifting during installation; the clamp support mounting plate is connected with the bakelite through screws and is fixed to the fixed-end butterfly valve clamp mounting seat; the bakelite can insulate the ultra-low temperature transmitted by the low-temperature valve body to a certain extent; the clamp support mounting plate is connected with the clamp connecting plate through the clamp support mounting plate pin shaft; the end of the clamp connecting plate away from the clamp support mounting plate is provided with a waist-shaped groove; the design of the waist-shaped groove can increase the movement space after the clamp is separated to prevent freezing caused jamming; the locking pin shaft, locking nut and screw, and connecting sleeve constitute a clamp locking end for locking after the clamp mechanism is installed in place. During normal conveying of the low-temperature valve body, the clamp mounting end is limited in the hot oil clamp block limiting hole and is locked through the clamp locking end; when the device is in an emergency separation stage, the hydraulic rod is actively retracted to force the clamp mounting end to be separated from the hot oil clamp block limiting hole and to be assisted to be opened under the action of the front end wedge-shaped separation block, so that the clamp mechanism loses the clamping effect, and then the double butterfly valve low-temperature valve is separated to realize emergency separation.

[0011] Compared with the prior art, the beneficial effects of the present application are that:

[0012] (1) The transverse installation mode is adopted to be connected with the hose system, which can be applied to the installation mode of the transverse layout on the ship;

[0013] (2) The hydraulic active retraction mode is adopted for the driving mechanism, the driving process is controllable, the driving force is stable and can be compatible up and down, and the hydraulic rod is retracted to drive the driving part back to the fixed end of the butterfly valve during the retraction process, thereby avoiding the obstacle caused by the conventional push-out hydraulic rod to the separation process;

[0014] (3) The low-temperature valve body adopts a double butterfly valve structure with a top-to-top type, which can meet the requirements of the size and weight of the ship body layout, the umbrella-shaped flow passage design can realize smooth running of the medium in the conveying state, good flow state, and reduction of flow resistance and water hammer pressure, and the two-end valve can be self-closed and leak-free in the emergency separation state;

[0015] (4) The hot oil circulating mechanism is configured, a one-way valve is designed in the hydraulic cylinder body, and integration with the driving mechanism is realized, so that the hot oil circulates in the entire driving part to prevent icing and adhesion at the contact position of the driving part and the clamp, thereby causing the device to be unable to separate or to separate disorderly; and the space limitation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the drawings and examples.

[0017] Figure 1 is the schematic diagram of the active emergency disengaging device for the super-low temperature hose delivery system.

[0018] Figure 2 is the schematic diagram of the low temperature valve structure of the emergency disengaging device.

[0019] Figure 3 is the schematic diagram of the hydraulic drive mechanism and the hot oil circulation mechanism.

[0020] Figure 4 is the schematic diagram of the hoop mechanism.

[0021] Figure 5 is the schematic diagram of the hot oil clamp block structure.

[0022] The embodiment proposes a delivery device for the ship-to-ship hose transfer of the offshore super-low temperature fluid, i.e. the active emergency disengaging device for the super-low temperature hose delivery, which is suitable for the delivery of the super-low temperature medium and can realize the active separation of the hose delivery system. Figure 1 As shown in the figure, the active emergency disengaging device for the super-low temperature hose delivery is composed of a low temperature valve body 1, a drive mechanism 2, a hot oil circulation mechanism 4 and a hoop mechanism 3, wherein the low temperature valve body 1 adopts the opposed top structure inside, is the installation basis of the drive mechanism 2, the hot oil circulation mechanism 4, the hoop mechanism 3 and the opposed top double butterfly valve assembly 5, the opposed top double butterfly valve assembly 5 is the delivery and closing passage of the medium; the drive mechanism 2 adopts the hydraulic active drive mode, provides the power source for the emergency disengaging of the device; the hoop mechanism 4 is the executing mechanism, is used for clamping or releasing the low temperature valve body 1, realizes the normal delivery and the emergency disengaging action of the device; the hot oil circulation mechanism 3 is the supplement of the drive mechanism, the hot oil is used as the driving source and circulates in the driving components of the drive mechanism 2, prevents the icing adhesion of the hoop mechanism 4 and the driving components of the drive mechanism 2, causes the poor disengaging or the disengaging not in place.

[0023] As shown in the figure, the active emergency disengaging device for the super-low temperature hose delivery is composed of a low temperature valve body 1, a drive mechanism 2, a hot oil circulation mechanism 4 and a hoop mechanism 3, wherein the low temperature valve body 1 adopts the opposed top structure inside, is the installation basis of the drive mechanism 2, the hot oil circulation mechanism 4, the hoop mechanism 3 and the opposed top double butterfly valve assembly 5, the opposed top double butterfly valve assembly 5 is the delivery and closing passage of the medium; the drive mechanism 2 adopts the hydraulic active drive mode, provides the power source for the emergency disengaging of the device; the hoop mechanism 4 is the executing mechanism, is used for clamping or releasing the low temperature valve body 1, realizes the normal delivery and the emergency disengaging action of the device; the hot oil circulation mechanism 3 is the supplement of the drive mechanism, the hot oil is used as the driving source and circulates in the driving components of the drive mechanism 2, prevents the icing adhesion of the hoop mechanism 4 and the driving components of the drive mechanism 2, causes the poor disengaging or the disengaging not in place. Figure 2As shown, the low temperature valve body 1 is a double butterfly valve type, consisting of a fixed end butterfly valve 1-1 and a separate end butterfly valve 1-2, wherein the fixed end butterfly valve 1-1 is designed with a base 1-3 for the installation of the driving mechanism and a base 1-4 for the installation of the clamp mechanism; the two connecting ends of the low temperature valve body 1 are designed with fixed end tapered flow through holes 1-7 and separate end tapered flow through holes 1-8 as medium conveying channels and sealing structures, and the two remote ends are respectively designed with fixed end pair of top mounting seats 1-5 and separate end pair of top mounting seats 1-6 for connecting the fixed end pair of top seats 5-1 and the separate end pair of top seats 5-5; the fixed end pair of top rods 5-3 and the separate end pair of top rods 5-7 are respectively designed with fixed end umbrella-shaped flow through surfaces 5-32 and separate end umbrella-shaped flow through surfaces 5-72, which can ensure smooth operation of the medium and good flow state, and can also reduce flow resistance and water hammer pressure; at the same time, the front end of the fixed end umbrella body structure 5-31 of the fixed end pair of top rods 5-3 is designed with a fixed end top pair of top pins 5-34, and the front end of the separate end umbrella body structure 5-71 of the separate end pair of top rods 5-7 is designed with a separate end top pair of top pins 5-73, which are the components directly acting on the fixed end butterfly valve 1-1 and the separate end butterfly valve 1-2 during installation and separation, and the fixed end top pair of top pins 5-34 and the separate end top pair of top pins 5-73 are in the state of protruding from the end surface of the low temperature valve body 1 in the normal state; the umbrella handle of the fixed end pair of top rods 5-3 is wound with a fixed end low temperature spring 5-4, and the fixed end low temperature spring 5-4 is provided with a fixed end internal and external limiting block 5-2 installed on the fixed end pair of top seats 5-1, one end of the fixed end low temperature spring 5-4 is clamped into the groove of the fixed end internal and external limiting block 5-2, and the other end is used to support the fixed end umbrella body structure 5-31, and the umbrella handle is inserted through the fixed end internal and external limiting block 5-2 and the fixed end pair of top seats 5-1. Similarly, the umbrella handle of the separate end pair of top rods 5-7 is also wound with a separate end low temperature spring 5-8, and the separate end low temperature spring 5-8 is provided with a separate end internal and external limiting block 5-6 installed on the separate end pair of top seats 5-5, one end of the separate end low temperature spring 5-8 is clamped into the groove of the separate end internal and external limiting block 5-6, and the other end is used to support the separate end umbrella body structure 5-71, and the umbrella handle is inserted through the separate end internal and external limiting block 5-6 and the separate end pair of top seats 5-5.During the installation of the fixed-end butterfly valve 1-1 and the disconnected-end butterfly valve 1-2, after the two mating ends of the cryogenic valve body 1 are aligned, the top pin 5-34 of the fixed end of the internal fixed-end push rod 5-3 and the top pin 5-73 of the disconnected-end push rod 5-7 interact and compress, compressing the fixed-end cryogenic spring 5-4 and the disconnected-end cryogenic spring 5-8. This causes the fixed-end umbrella-shaped flow surface 5-32 of the fixed end of the fixed end push rod 5-3 to separate from the fixed-end conical flow hole 1-7 of the fixed end butterfly valve 1-1, and the disconnected-end umbrella-shaped flow surface 5-72 of the disconnected-end push rod 5-7 to separate from the disconnected-end conical flow hole 1-8 of the disconnected-end butterfly valve 1-2. The umbrella-shaped conveying passage is opened; during the separation stage of the fixed end butterfly valve 1-1 and the detachment end butterfly valve 1-2, after the two mating ends of the cryogenic valve body 1 separate, the top pin 5-34 of the fixed end and the top pin 5-73 of the detachment end lose their mutual squeezing effect. The umbrella body structure 5-31 of the fixed end and the umbrella body structure 5-71 of the detachment end extend under the restoring force of the cryogenic spring 5-4 of the fixed end and the cryogenic spring 5-8 of the detachment end, respectively. The umbrella-shaped flow surface 5-32 of the fixed end contacts the conical flow hole 1-7 of the fixed end and achieves a seal. The umbrella-shaped flow surface 5-72 of the detachment end contacts the conical flow hole 1-8 of the detachment end and achieves a seal, completing the separation without leakage.

[0024] like Figure 3 and Figure 5As shown, the drive mechanism 2 consists of a hydraulic cylinder body 2-1, a hydraulic rod 2-2, a drive mechanism pad 2-7, a compression nut 2-3, a pull-out screw 2-4, a blocking block 2-5, a hot oil clamping block 2-6, and a rain cover 2-8. The hydraulic cylinder body 2-1 is connected to the drive mechanism pad 2-7 by screws and fixed to the fixed end butterfly valve drive mounting seat 1-3. The drive mechanism pad 2-7 can isolate the ultra-low temperature transmitted by the low-temperature valve body 1 to a certain extent. The hydraulic rod 2-2 is initially in the fully extended position. After passing through the hydraulic rod mounting hole 2-66 of the hot oil clamping block 2-6, the compression nut 2-3 is installed at the front end. The blocking block 2-5 is placed in the hot oil clamping block 2-6. The oil clamp block 2-6 is placed on surface 2-65 and pre-tightened by pull-out screw 2-4. The pull-out screw 2-4 is tightened into screw hole 2-64. The front end of the hot oil clamp block 2-6 is symmetrically designed with wedge-shaped separation blocks 2-68 to assist in separating the clamping mechanism 3. The middle is designed with left limit hole 2-63 and right limit hole 2-62, which are used in conjunction with blocking block 2-5 to limit the clamping mechanism 3. The rear end is designed with hot oil clamp block oil supply passage 2-61 for circulating hot oil and preventing ice from forming at left limit hole 2-63 and right limit hole 2-62. The rain cover 2-8 can protect the hydraulic rod 2-2 and prevent rainwater and debris from entering the hydraulic cylinder 2-1 with the hydraulic rod 2-2. In an emergency disengagement state, the hydraulic rod 2-2 can be actively retracted, the compression nut 2-3 can contact and compress the front end face 2-67 of the hot oil clamp 2-6, the pull-out screw 2-4 can be broken, and the clamping mechanism 3 can be disengaged from the left limit hole 2-63 and the right limit hole 2-62, and opened under the action of the wedge-shaped separation block 2-68 at the front end of the hot oil clamp 2-6, thus achieving active disengagement.

[0025] The hot oil circulation mechanism consists of a first quick-connect interface 4-1 and a second quick-connect interface 4-5, oil pipes 4-2, 4-3, and 4-4, a quick-connect mounting plate 4-6, etc. The hot oil circulation mechanism 4 is a supplement to the drive mechanism 2 and complements the drive mechanism 2. The hot oil circulation mechanism 4 is designed to prevent the hot oil clamp 2-6 from becoming too cold during the conveying process due to the heat transfer of the low-temperature valve body 1. This would cause the hot oil clamp 2-6 to freeze and stick at the contact point between the clamping mechanism 3 and the hot oil clamp 2-6 due to the low temperature, resulting in the inability to detach or the detachment being difficult during the detachment process. The first quick-connect interface 4-1 and the second quick-connect interface 4-5 are the inlet and outlet of hot oil, fixed to the quick-connect mounting plate 4-6. The quick-connect mounting plate 4-6 is fixed to the fixed end butterfly valve drive mounting seat 1-3 by screws. The oil pipe 4-2 connects the first quick-connect interface 4-1 to the hydraulic cylinder 2-1. The oil pipe 4-3 connects the hydraulic cylinder 2-1 to the hot oil clamp 2-6. The oil pipe 4-4 connects the hot oil clamp 2-6 to the second quick-connect interface 4-5, thus forming a hot oil circuit. During normal operation, heated hydraulic oil enters the rodless chamber of hydraulic cylinder 2-1 through the first quick-connect port 4-1. The oil drives the hydraulic rod 2-2 to extend while simultaneously flowing through the one-way valve block within hydraulic cylinder 2-1 to the rod chamber. It then enters the hot oil clamp 2-6 through oil pipe 4-3, thus heating the clamp and preventing freezing. After passing through the hot oil passage 2-61 of the hot oil clamp 2-6, the oil flows back through oil pipe 4-4 to the second quick-connect port 4-5. During emergency disengagement, heated hydraulic oil enters the rod chamber of hydraulic cylinder 2-1 through the second quick-connect port 4-5 and the hot oil clamp 2-6. Due to the one-way valve, the oil can only drive the hydraulic rod 2-2 to retract within the rod chamber. The oil then flows back from the rodless chamber through oil pipe 4-2 to the first quick-connect port 4-1.

[0026] like Figure 4As shown, the clamping mechanism 3 consists of a left clamp 3-1, a right clamp 3-2, a clamp support mounting plate 3-12, a clamp connecting plate 3-10, bakelite 3-13, a clamp support mounting plate pin 3-11, a locking pin 3-9, a locking nut and screw 3-8, and a connecting sleeve 3-7. The left clamp 3-1 and right clamp 3-2 have conical grooves 3-21 for fitting and clamping the cryogenic valve body 1 of the double butterfly valve. The top of each has a left clamp mounting end 3-5 and a right clamp mounting end 3-4, which are cylindrical and respectively mate with the right limiting hole 2-62 and the left limiting hole 2-63 of the hot oil clamping block 2-6, limiting and clamping the left clamp mounting end 3-5 and the right clamp mounting end 3-4. The clamp 3-2 is designed with lifting lugs 3-6 for hoisting during installation; the clamp support mounting plate 3-12 is connected to bakelite 3-13 by screws and fixed to the fixed end butterfly valve clamp mounting seat 1-4. The bakelite 3-13 can isolate the ultra-low temperature transmitted by the low temperature valve body 1 to a certain extent. The clamp support mounting plate 3-12 is connected to the clamp connecting plate 3-10 through the clamp support mounting plate pin 3-11. One end of the clamp connecting plate 3-10 is provided with a waist-shaped groove. The waist-shaped groove design can increase the activity space after the clamp mechanism 3 is disengaged and prevent jamming caused by icing. The locking pin 3-9, locking nut and screw 3-8, connecting sleeve 3-7, etc. constitute the clamp locking end, which is used for locking after the clamp mechanism 3 is installed in place. During normal operation of the cryogenic valve body, the left clamp mounting end 3-5 is positioned within the right limiting hole 2-62 of the hot oil clamp 2-6, and the right clamp mounting end 3-4 is positioned within the left limiting hole 2-63 of the hot oil clamp 2-6, and is locked by the clamp locking end. When the device is in the emergency release phase, the hydraulic rod 2-2 retracts actively, forcing the left clamp mounting end 3-5 to disengage from the right limiting hole 2-62 of the hot oil clamp 2-6, and the right clamp mounting end 3-4 to disengage from the left limiting hole 2-63 of the hot oil clamp 2-6. With the assistance of the front wedge-shaped separation block 2-68, the clamp mechanism 3 loses its clamping effect, and then the double butterfly valve cryogenic valve 1 separates, achieving emergency release.

[0027] The working principle of the active emergency escape device of the present invention includes:

[0028] During the installation of the double butterfly valve, after the two mating ends of the cryogenic valve body are aligned, the clamping end is limited in the limiting hole of the hot oil clamp and locked by the clamping locking end. Under the fit of the clamping tapered groove, the clamping mechanism clamps the cryogenic valve body of the double butterfly valve. At the same time, the heated hydraulic oil enters the rodless chamber of the hydraulic cylinder through the first quick-connect interface 4-1. The oil drives the hydraulic rod to extend, pass through the hot oil clamp, and install the compression nut and pull-out screw, and is in the initial position.

[0029] During the conveying stage, the top pins of the push rods at both ends inside the cryogenic valve body interact and compress the spring, causing the umbrella-shaped flow surfaces at both ends of the push rods to separate from the conical flow holes of the cryogenic valve body. The umbrella-shaped conveying passage is opened, and the internal medium is conveyed normally. At the same time, the oil flows unidirectionally through the one-way valve block in the hydraulic cylinder to the rod chamber of the hydraulic cylinder, and then enters the hot oil clamping block through the oil pipe, thereby heating the hot oil clamping block and preventing freezing. After passing through the hot oil passage of the hot oil clamping block, the oil flows back to the second quick-connect interface 4-5 through the oil pipe to complete the hot oil circulation.

[0030] During the emergency disengagement phase, the heated hydraulic oil enters the rod chamber of the hydraulic cylinder through the second quick-connect port 4-5 via the hot oil clamp. Due to the action of the check valve, the oil can only drive the hydraulic rod to retract actively within the rod chamber of the hydraulic cylinder. During the retraction of the hydraulic rod, the compression nut contacts and compresses the front end of the hot oil clamp, breaking the pull-out screw and forcing the clamp mounting end to disengage from the limiting hole of the hot oil clamp. With the assistance of the front wedge-shaped separation block, the clamp mechanism loses its clamping effect. Then, the two butt joints of the double butterfly valve and the cryogenic valve separate, and the top pins at both ends lose their mutual compression effect. The umbrella structure extends under the action of the spring return force, and the umbrella-shaped flow surfaces at both ends contact the conical flow holes and achieve a seal, completing the active emergency disengagement without leakage.

Claims

1. An active emergency disconnection device suitable for cryogenic hose delivery, comprising a valve body, a hydraulic drive mechanism, and a clamping mechanism, wherein the valve body includes a fixed end valve and a disconnection end valve, characterized in that: The hydraulic drive mechanism includes a hydraulic cylinder, a hydraulic rod, and a connecting piece. During the hydraulic delivery phase, the hydraulic cylinder drives the hydraulic rod to extend, and the connecting piece contacts and connects with the clamping mechanism. During the emergency release phase, the hydraulic rod retracts into the hydraulic cylinder body, causing the connecting piece to disengage and open the clamping mechanism. A hot oil circulation mechanism is fixed on the hydraulic drive mechanism. The hot oil circulation mechanism provides hot oil to the hydraulic drive mechanism and forms multiple circuits with the hydraulic drive mechanism. The hot oil circulates between the various components of the hydraulic drive mechanism, preventing the contact area between the clamping mechanism and the hydraulic drive mechanism from freezing and sticking. When the hydraulic drive mechanism opens the clamping mechanism, the valve body is quickly released. The connector includes a compression nut, a breakable screw, a blocking block, and a hot oil clamp. The hot oil clamp has a through hole through which the hydraulic rod passes and extends, with the compression nut installed at the extended end. A hot oil passage is provided at the end of the hot oil clamp near the hydraulic cylinder, with one end connected to the hydraulic cylinder via an oil pipe and the other end connected to a quick-connect interface via an oil pipe. Limiting holes are provided on both sides of the hot oil clamp. The blocking block is placed at the end of the hot oil clamp near the compression nut and pre-tightened by the breakable screw. When the fixed-end valve and the disengagement valve are connected, the clamping mechanism is connected to the limiting holes and fixed by the blocking block. When the hydraulic rod retracts, the compression nut contacts and compresses the end of the hot oil clamp, breaking the breakable screw, causing the clamping mechanism to disengage from the limiting holes, and the fixed-end valve and the disengagement valve to disengage. The hot oil circulation mechanism consists of two quick-connect interfaces, oil pipes, and a quick-connect mounting plate. The hot oil circulation mechanism complements the drive mechanism. The two quick-connect interfaces are the inlet and outlet of the hot oil, fixed to the quick-connect mounting plate. The quick-connect mounting plate is fixed to the fixed-end butterfly valve drive mounting seat by screws. The oil pipe connects the quick-connect interfaces to the hydraulic cylinder, the hydraulic cylinder to the hot oil clamp, and the hot oil clamp to the quick-connect interfaces. The hot oil clamp has a hot oil channel at the end near the hydraulic cylinder, forming a hot oil circuit. During normal operation, the heated hydraulic oil enters the rodless chamber of the hydraulic cylinder through the first quick-connect interface. The oil drives the hydraulic rod to extend and simultaneously flows unidirectionally through the one-way valve block inside the hydraulic cylinder to the rod chamber. It then enters the hot oil clamp through the oil pipe, serving to heat the oil. After passing through the hot oil passage of the hot oil clamp, the oil flows back to the second quick-connect interface through the oil pipe. During the emergency disengagement phase, the inlet and outlet of the two quick-connect ports are interchanged. The heated hydraulic oil enters the rod chamber of the hydraulic cylinder through the second quick-connect port and the hot oil clamp, while the oil flows back from the rodless chamber through the oil pipe to the first quick-connect port and out. The connection section between the hydraulic cylinder and the hydraulic rod is equipped with a rain cover to protect the hydraulic rod.

2. The active emergency escape device according to claim 1, characterized in that: The hot oil clamp is provided with a wedge-shaped separation block at one end near the compression nut to assist in separating the clamping mechanism. The hydraulic cylinder is fixed to the fixed end valve through the drive mechanism pad.

3. The active emergency escape device according to claim 1, characterized in that: The clamping mechanism includes left and right clamps, each with a conical groove that fits the valve body. The top of the separating ends of the left and right clamps are each provided with a cylindrical clamping mounting end that mates with the limiting hole of the hot oil clamp block.

4. The active emergency escape device according to claim 3, characterized in that: The fixed connection ends of the left and right clamps are hinged to clamp connection plates via pins. The clamp connection plates are hinged to clamp support mounting plates. The clamp support mounting plates are connected to bakelite via screws and fixed to the fixed end valve. A waist-shaped groove is provided at the end of the clamp connection plate away from the clamp support mounting plate.

5. The active emergency escape device according to any one of claims 1 to 4, characterized in that: The valve body is a double butterfly valve type, including a fixed end butterfly valve and a disconnected end butterfly valve mounted in pairs. The valve body is connected to the hose system by a horizontal installation method.

6. The active emergency escape device according to claim 5, characterized in that: The fixed-end butterfly valve and the disconnected-end butterfly valve are provided with tapered flow holes at their mating ends, which serve as medium conveying channels and sealing structures. The far end of the fixed-end butterfly valve and the disconnected-end butterfly valve are respectively provided with opposing mounting seats for fixing the opposing bases at that end.

7. The active emergency escape device according to claim 6, characterized in that: The opposing rods in the fixed-end and disconnected-end butterfly valves adopt an umbrella-shaped flow surface top structure, which includes an umbrella handle and an umbrella-shaped flow surface body structure. The opposing base is fixedly connected to inner and outer limiting blocks. The umbrella handle of the opposing rod is wound inside a spring. One end of the spring is inserted into the groove of the inner and outer limiting blocks, and the other end is connected to the umbrella body structure. At the same time, the umbrella handle is inserted through the inner and outer limiting blocks and the opposing base. The top of the umbrella body structure of the opposing rod at both ends of the fixed-end and disconnected-end butterfly valves is respectively provided with a top opposing pin. When the fixed-end and disconnected-end butterfly valves are connected, the spring is in a compressed state, the top opposing pins extend out of the valve body end face and squeeze each other, and the umbrella-shaped flow surfaces at both ends of the opposing rod separate from the conical flow holes of the valve body, opening the umbrella-shaped conveying passage. After the fixed-end and disconnected-end butterfly valves are separated at the docking ends, the top opposing pins at both ends lose their squeezing effect, the umbrella body structure extends under the action of the spring's restoring force, and the umbrella-shaped flow surfaces at both ends contact and seal with the conical flow holes respectively.

8. The active emergency escape device according to claim 5, characterized in that: The fixed-end butterfly valve is provided with bases on both sides, which are used for the installation of the hydraulic drive mechanism and the clamping mechanism, respectively.

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