Quick cut-off device for LNG (Liquefied Natural Gas) conveying hose
By designing a rapid cut-off device for LNG transport hoses, using clamps, hydraulic cylinders, and check valves to achieve rapid cutting and sealing of the hoses, the leakage problem during emergency disconnection is solved. The height can also be adjusted by the support assembly to adapt to different environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG JIEXIN MARINE ENGINEERING CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-05-19
AI Technical Summary
Existing LNG delivery hoses are prone to liquefied natural gas leakage when using emergency disconnect devices, which are not easy to seal.
Design a rapid cutting device including an emergency detachment device and a support assembly. The device uses clamps, hydraulic cylinders, and pull-out bolts to quickly cut the hose and uses a check valve to reset under the action of a spring to achieve sealing. The support assembly can be adjusted in height to adapt to different environments.
It enables rapid disconnection of LNG delivery hoses to prevent liquefied natural gas leaks, and its height can be adjusted to adapt to different environments as needed.
Smart Images
Figure CN224261205U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of marine equipment technology, specifically to a quick-cutting device for LNG transport hoses. Background Technology
[0002] LNG delivery hoses are hoses specifically designed for transporting liquefied natural gas (LNG). They offer excellent cryogenic performance, flexibility, and durability, and are commonly used in LNG ship bunkering, onshore receiving terminals, and vehicle refueling stations. They enable the safe and efficient handling of LNG in extreme cryogenic environments.
[0003] LNG transport hoses typically consist of multiple layers of different materials to ensure their performance at low temperatures. The inner layer is made of extruded polytetrafluoroethylene and covered with a polyester film, while the outer layer is made of multiple layers of nylon braided with additional polyester fiber braiding and a special biaxially oriented polypropylene film. These designs enable the hose to maintain its flexibility and durability in environments as low as -200°C.
[0004] Emergency disconnection devices, also known as cryogenic breakaway valves, are crucial equipment for pipeline emergency breakaway protection, suitable for petrochemical, marine engineering, and shipbuilding industries. A breakaway valve typically consists of two check valves, each containing key components such as a housing, valve disc, main sealing ring, main sealing seat, and guide plate. The valve disc employs a double-spherical gyro-shaped structure to ensure excellent sealing while reducing flow resistance and pressure loss. The breakaway mechanism is designed to trigger rapidly in emergencies, instantly closing the valve, reducing leakage and pressure loss. Breakaway valves are generally installed at the front end of the loading arm and are used to automatically and quickly disconnect the tank truck from the loading arm in emergencies. Applications include ship-to-shore unloading, tank loading and unloading on highways and railways, and other fixed and mobile fluid storage devices, suitable for loading and unloading various chemical media such as oil, liquefied gas, and natural gas.
[0005] However, existing LNG delivery hoses still have some drawbacks when detached using emergency disconnection devices:
[0006] When using an emergency disconnect device to disconnect, the device causes a leak by breaking the hose to prevent accidents. However, when the hose is broken, the emergency disconnect device cannot easily seal the hose, which can easily lead to a leak of liquefied natural gas. Utility Model Content
[0007] In order to solve the above problems, the purpose of this utility model is to provide a quick-cutting device for LNG transport hoses.
[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a quick-cutting device for LNG transport hoses, comprising an emergency disconnection device and a support assembly. The emergency disconnection device is mounted on the support assembly and includes a connecting hose end and a connecting hose flange end. The connecting hose flange end is detachably mounted on the connecting hose end. The emergency disconnection device is respectively equipped with a clamp, a hydraulic cylinder, and a break bolt. One end of the break bolt is mounted on the piston end of the hydraulic cylinder, and the other end of the break bolt is mounted on the clamp. The connecting hose end and the connecting hose flange end are fixedly connected by the clamp.
[0009] Preferably, a check valve is installed in the inner cavity of the connecting hose end.
[0010] Preferably, the hydraulic cylinder is provided with a hydraulic pipe outlet and a hydraulic pipe inlet.
[0011] Preferably, an anti-collision ring is fitted on the end of the connecting hose.
[0012] Preferably, the support assembly includes a U-shaped support frame, with support plates slidably disposed at both ends of the U-shaped support frame. An arc-shaped plate is fixedly disposed at one end of each of the two support plates. Two mounting bolts are threadedly rotatably mounted on the arc-shaped plate. One end of two of the mounting bolts is threadedly rotatably connected to a threaded hole on the outer wall of the connecting hose end, and one end of the other two mounting bolts is threadedly rotatably connected to a threaded hole on the outer wall of the connecting hose flange end. An adjustment assembly is disposed between the U-shaped support frame and the support plates.
[0013] Preferably, an anti-slip pad is fixedly provided on the upper surface of the arc-shaped plate, and mounting ear plates are fixedly provided at both ends of the U-shaped support frame.
[0014] Preferably, the adjusting component includes two lifting blocks. Each of the two support plates has a slot at one end. The lifting block is fixedly mounted at one end of the slot. Lead screws are rotatably installed in the inner cavities at both ends of the U-shaped support frame. The lead screws pass through the lifting blocks and are threadedly rotatably connected to the lifting blocks. A rotating rod is rotatably mounted on the U-shaped support frame. Worms are fixedly installed at both ends of the rotating rod. Worm wheels are fixedly installed at one end of each of the two lead screws. The worms and worm wheels are meshed together.
[0015] Preferably, two guide grooves are provided in the inner cavities at both ends of the U-shaped support frame, and two guide blocks are fixedly provided at the other ends of the two support plates. The guide blocks are slidably disposed at one end of the guide groove, and a hexagonal seat is fixedly provided at one end of the rotating rod.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] 1. In this utility model, by setting a clamp, a break bolt and a hydraulic cylinder, the hydraulic cylinder receives a signal and begins to retract, disconnecting the break bolt and pushing open the clamp, thereby separating the connecting hose end and the connecting hose flange end, thus conveniently realizing the rapid cutting of the LNG transmission hose;
[0018] 2. In this utility model, by setting a check valve, during the rapid shut-off process, the check valve is reset under the action of the spring, thereby achieving the sealing of the connection hose end and preventing liquefied natural gas leakage.
[0019] 3. In this utility model, by setting a support component and an adjustment component, after the emergency detachment device is assembled onto the support component, the lifting block is driven to rise and fall vertically. The lifting block, through the support plate and the arc plate, makes the emergency detachment device rise and fall vertically synchronously, so that the height of the emergency detachment device reaches the height required for pipeline assembly, thereby meeting the height adjustment requirements of the emergency detachment device in different environments and improving flexibility. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a quick-cutting device for LNG transport hoses according to the present invention.
[0022] Figure 2 This is a schematic diagram of the hydraulic pipe outlet and hydraulic pipe inlet of this utility model.
[0023] Figure 3 This is a side view of a quick-cutting device for LNG transport hoses according to the present invention.
[0024] Figure 4 This is a schematic diagram of the connection structure of the support component and adjustment component of this utility model.
[0025] Figure 5 This is a cross-sectional structural diagram of the U-shaped support frame of this utility model.
[0026] Figure 6 This utility model Figure 5 Enlarged schematic diagram of part A in the diagram.
[0027] In the diagram: 1. Clamp; 2. Anti-collision ring; 3. Hydraulic cylinder; 4. Pull-out bolt; 5. Check valve; 31. Hydraulic pipe outlet; 311. Hydraulic pipe inlet; 10. Emergency release device; 20. Connecting hose end; 30. Connecting hose flange end; 40. Support assembly; 50. Adjustment assembly; 41. U-shaped support frame; 42. Support plate; 43. Arc plate; 44. Anti-slip pad; 45. Mounting bolt; 46. Assembly ear plate; 51. Lifting block; 52. Groove; 53. Guide groove; 54. Guide block; 55. Lead screw; 56. Rotating rod; 57. Worm gear; 58. Worm wheel; 59. Hexagonal seat. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Example: Figure 1-6As shown, this utility model provides a quick-cutting device for LNG transfer hoses, including an emergency disconnection device 10 and a support assembly 40. The emergency disconnection device 10 is mounted on the support assembly 40, which supports the emergency disconnection device 10. The emergency disconnection device 10 includes a connecting hose end 20 and a connecting hose flange end 30. The connecting hose flange end 30 is detachably mounted on the connecting hose end 20. The emergency disconnection device 10 is equipped with a clamp 1, an anti-collision ring 2, a hydraulic cylinder 3, and a pull-off bolt 4. One end of the pull-off bolt 4 is mounted on the piston end of the hydraulic cylinder 3, and the other end is mounted on the clamp 1. The clamp 1 consists of two semi-circular clamps and bolts, similar to a clamp structure, which fixes the connecting hose end 20 and the connecting hose flange end 30. The hydraulic cylinder 3 is provided with a hydraulic pipe outlet 31 and a hydraulic pipe inlet 311. By providing the hydraulic pipe outlet 31 and the hydraulic pipe inlet 311, the LNG transfer hose can be cut off. The hydraulic inlet 311 inputs hydraulic oil for the operation of the hydraulic cylinder 3 into the hydraulic cylinder 3. The hydraulic oil in the hydraulic cylinder 3 can be discharged outward through the hydraulic outlet 31. The connecting hose end 20 and the connecting hose flange end 30 are fixedly connected by the clamp 1. In an emergency disconnection state, the hydraulic cylinder 3 receives a signal and begins to retract, disconnecting the pull-off bolt 4 and pushing open the clamp 1, thereby separating the connecting hose end 20 and the connecting hose flange end 30. The anti-collision ring 2 is installed on the connecting hose end 20. By setting the anti-collision ring 2, the anti-collision ring 2 can protect the connecting hose end 20 and improve the service life of the connecting hose end 20. The inner cavity of the connecting hose end 20 is equipped with a check valve 5. By setting the check valve 5 on the connecting hose flange end 30, under normal working conditions, the internal flow channels of the connecting hose end 20 and the connecting hose flange end 30 are in a flowing state. During the pull-off process, the check valve 5 is reset under the action of the spring, thereby sealing the connecting hose end 20 and preventing liquefied natural gas leakage.
[0030] The support assembly 40 includes a U-shaped support frame 41, with support plates 42 slidably mounted at both ends of the U-shaped support frame 41. An arc-shaped plate 43 is fixedly mounted at one end of each support plate 42. An anti-slip pad 44 is fixedly mounted on the upper surface of the arc-shaped plate 43. Two mounting bolts 45 are threadedly mounted on the arc-shaped plate 43. One end of each of the two mounting bolts 45 is threadedly connected to a threaded hole on the outer wall of the connecting hose end 20, and the other two mounting bolts 45 are threadedly connected to a threaded hole on the outer wall of the connecting hose flange end 30. This assembly utilizes the two arc-shaped plates 43 and their corresponding mounting bolts. Bolt 45 is used to install the connecting hose end 20 and the connecting hose flange end 30 respectively, so as to realize the installation support of the connecting hose end 20 and the connecting hose flange end 30. Both ends of the U-shaped support frame 41 are fixedly provided with mounting ear plates 46. By setting the mounting ear plates 46, the U-shaped support frame 41 can be fixed to the external platform. An adjustment component 50 is provided between the U-shaped support frame 41 and the support plate 42. By setting the adjustment component 50, the height of the connected hose end 20 and the connecting hose flange end 30 after installation can be adjusted, improving flexibility.
[0031] The adjusting assembly 50 includes two lifting blocks 51. Each of the two support plates 42 has a slot 52 at one end. The lifting blocks 51 are fixedly mounted at one end of the slot 52. By driving the lifting blocks 51 to move vertically, the lifting blocks 51 enable the support plates 42 to move vertically within the inner cavity of the U-shaped support frame 41. Each end of the U-shaped support frame 41 has two guide grooves 53. Each of the two support plates 42 has two fixed guide blocks 54 at one end. The guide blocks 54 are slidably mounted at one end of the guide grooves 53. By using the guide grooves 53 and guide blocks 54, the guide blocks 54 can slide vertically along the inner wall of the guide grooves 53, thereby ensuring that the support plates 42 remain vertically raised. The U-shaped support frame 41 has lead screws 55 rotatably installed in the inner cavities at both ends. The lead screws 55 pass through the lifting block 51 and are threadedly connected to the lifting block 51. By driving the lead screws 55 to rotate, the lead screws 55 can drive the lifting block 51 to rise and fall vertically. A rotating rod 56 is rotatably installed on the U-shaped support frame 41. Worms 57 are fixedly installed at both ends of the rotating rod 56. Worm wheels 58 are fixedly installed at one end of the two lead screws 55. The worms 57 and worm wheels 58 are meshed and connected. A hexagonal seat 59 is fixedly installed at one end of the rotating rod 56. By manually rotating the hexagonal seat 59 or by rotating the hexagonal seat 59 with a hexagonal wrench, the rotating rod 56 can be rotated. The rotating rod 56 can rotate the lead screws 55 through the worms 57 and worm wheels 58.
[0032] Working principle: Under normal working conditions, the internal flow channels of the connecting hose flange end 30 and connecting hose end 20 of the emergency disconnection device 10 are in a flow state;
[0033] In an emergency disengagement state, the hydraulic cylinder 3 receives a signal and begins to retract, disconnecting the pull-off bolt 4 and pushing open the clamp 1, thereby separating the connecting hose end 20 and the connecting hose flange end 30. At the same time, under the action of the check valve 5, the check valve 5 resets under the action of the spring, thereby sealing the connecting hose end 20 and preventing liquefied natural gas leakage.
[0034] When it is necessary to support the emergency detachment device 10, the operator can place the emergency detachment device 10 on top of the support assembly 40 and fix the connecting hose end 20 and the connecting hose flange end 30 to the two arc plates 43 respectively by four mounting bolts 45. At this time, the U-shaped support frame 41 supports the connecting hose end 20 and the connecting hose flange end 30 through the support plate 42 and the arc plate 43.
[0035] When the height of the emergency detachment device 10 needs to be adjusted, the operator manually or with a hex wrench rotates the hexagonal base 59. The hexagonal base 59 causes the rotating rod 56 to rotate. The rotating rod 56, through two worm gears 57 and two worm wheels 58, causes two lead screws 55 to rotate synchronously in the same direction. The two lead screws 55 drive two lifting blocks 51 to rise and fall vertically. The two lifting blocks 51, through two support plates 42 and two arc-shaped plates 43, cause the emergency detachment device 10 to rise and fall vertically synchronously, so that the height of the emergency detachment device 10 reaches the height required for pipeline assembly. This can meet the height adjustment needs of the emergency detachment device 10 in different environments and improve flexibility.
[0036] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0037] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A quick-cutting device for an LNG transport hose, comprising an emergency disconnection device (10) and a support assembly (40), the emergency disconnection device (10) being mounted on the support assembly (40), the emergency disconnection device (10) comprising a connecting hose end (20) and a connecting hose flange end (30), the connecting hose flange end (30) being detachably mounted on the connecting hose end (20), characterized in that: The emergency detachment device (10) is equipped with a clamp (1), a hydraulic cylinder (3), and a pull-off bolt (4). One end of the pull-off bolt (4) is mounted on the piston end of the hydraulic cylinder (3), and the other end of the pull-off bolt (4) is mounted on the clamp (1). The connecting hose end (20) and the connecting hose flange end (30) are fixedly connected by the clamp (1).
2. The quick-cutting device for LNG transport hoses as described in claim 1, characterized in that, A check valve (5) is installed in the inner cavity of the connecting hose end (20).
3. The quick-cutting device for LNG transport hoses as described in claim 1, characterized in that, The hydraulic cylinder (3) is provided with a hydraulic pipe outlet (31) and a hydraulic pipe inlet (311).
4. A quick-cutting device for LNG transport hoses as described in claim 1, characterized in that, An anti-collision ring (2) is fitted on the end (20) of the connecting hose.
5. A quick-cutting device for LNG transport hoses as described in claim 1, characterized in that, The support assembly (40) includes a U-shaped support frame (41), with support plates (42) slidably disposed at both ends of the U-shaped support frame (41). An arc plate (43) is fixedly disposed at one end of each of the two support plates (42). Two mounting bolts (45) are threadedly mounted on the arc plate (43). One end of the two mounting bolts (45) is threadedly rotatably connected to the threaded hole on the outer wall of the connecting hose end (20), and the other two mounting bolts (45) are threadedly rotatably connected to the threaded hole on the outer wall of the connecting hose flange end (30). An adjustment assembly (50) is disposed between the U-shaped support frame (41) and the support plate (42).
6. A quick-cutting device for LNG transport hoses as described in claim 5, characterized in that, The upper surface of the arc plate (43) is fixedly provided with anti-slip pads (44), and both ends of the U-shaped support frame (41) are fixedly provided with mounting ear plates (46).
7. A quick-cutting device for LNG transport hoses as described in claim 5, characterized in that, The adjustment component (50) includes a lifting block (51), two lifting blocks (51) are provided, and the other end of the two support plates (42) is provided with a slot (52). The lifting block (51) is fixedly provided at one end of the slot (52). The inner cavities at both ends of the U-shaped support frame (41) are rotatably installed with a lead screw (55). The lead screw (55) passes through the lifting block (51) and is threadedly connected to the lifting block (51). A rotating rod (56) is rotatably installed on the U-shaped support frame (41). Both ends of the rotating rod (56) are fixedly provided with a worm gear (57). One end of the two lead screws (55) is fixedly provided with a worm wheel (58). The worm gear (57) and the worm wheel (58) are meshed and connected.
8. A quick-cutting device for LNG transport hoses as described in claim 7, characterized in that, Two guide grooves (53) are provided in the inner cavities at both ends of the U-shaped support frame (41), and two guide blocks (54) are fixedly provided at the other ends of the two support plates (42). The guide blocks (54) are slidably provided at one end of the guide groove (53), and a hexagonal seat (59) is fixedly provided at one end of the rotating rod (56).