Manual quick connect device for FSRU vessel hose handling system

Abstract

The application discloses a kind of manual quick connecting device suitable for FSRU ship hose conveying system, including main body structure, locking part, guiding mechanism, sealing structure etc..The device is connected by bolt and hose front end flange, when FSRU ship carries out LNG conveying work, guiding target flange butt joint is guided by guiding arm, then screwing down movement is adjusted screw thread lead screw, to drive the block to move down, gradually press target flange, guarantee butt joint reliability, realize safe and stable conveying LNG purpose;Ship flange outer ring evenly distributed guiding arm;Locking part includes base, sleeve, limiting piece, screw thread lead screw, block, anti-drop nut, gasket, heat insulation pad, pressing nut.The device is equipped with circular hand to facilitate personnel accurate adjustment QCDC position, guiding butt joint is guided by guiding arm, reduces operation time, and locking part structure is simple, low in cost, simple to replace, can improve butt joint and separation efficiency, and higher reliability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ships, in particular the field of quick connection devices, and more particularly relates to a manual quick connection device suitable for a hose conveying system of an FSRU ship. BACKGROUND

[0002] FSRU, which stands for floating storage and regasification unit, is a special equipment integrating multiple functions of LNG (liquefied natural gas). Receiving and transferring are the basic functions of FSRU. In order to realize LNG receiving and transferring, a LNG cryogenic hose conveying system is developed, which mainly includes QCDC (manual quick connection device), ERS, hose hanger, saddle, hydraulic system, electrical system, etc. The QCDC is used to realize the docking and separation of FSRU and target ship. The QCDC can be divided into hydraulic and manual types according to the working mode. Since the target ship is not equipped with a hydraulic system and an electrical system, each part needs to be transferred from the FSRU to the target ship during docking, which is complicated and time-consuming. The manual QCDC does not require other system cooperation, and only needs to be hoisted to the target ship for manual docking, which is simple, safe and reliable.

[0003] There are some manual connection devices in the prior art, such as the QCDC designed in patent CN 216242948U. The operation of the QCDC is relatively cumbersome, and the compression bolt and the compression block are threadedly connected. When the separation operation is performed, the worker rotates the bolt. Since the compression block tightly presses the flange, the friction between them is very large, so the bolt will first rotate inside the compression block, and the compression block will not be driven away from the flange by rotating the bolt directly. Therefore, the operation is complicated, time-consuming and labor-intensive. In addition, the compression arm in the patent cannot be fixed in position. When horizontally docking, the compression arm located above will naturally hang down, affecting the docking, and the worker needs to manually move it away, increasing the docking operation and reducing the efficiency. SUMMARY

[0004] The purpose of the present application is to provide a manual quick connection device (QCDC) suitable for a LNG hose conveying system, which realizes docking and separation with a target flange through a locking assembly on the QCDC. The new type of locking assembly is designed to be simple to operate and can greatly improve safety performance.

[0005] The technical solution to achieve the purpose of this invention is as follows: a manual quick-connect device suitable for FSRU ship hose delivery systems. The device includes a receiving flange, and a plurality of guide arms and a plurality of locking components evenly spaced along the outer ring of the receiving flange. The outer ring of the guide arms is fixedly connected to a handle, and the guide arms are all flared outward to form a plurality of angles. The receiving flange is welded to one end of the connecting pipe, and the other end of the connecting pipe is provided with a hose connecting flange. The guide arms are used to guide the receiving flange to dock with the target flange on the receiving vessel, and the locking components are used to fix the manual quick-connect device to the target flange to ensure the sealing of the LNG hose delivery system.

[0006] The locking assembly includes a base, a sleeve, a limiting component, a threaded screw, a pressure block, a clamping nut, and a limiting bolt. The sleeve is vertically fixed to the receiving flange via the base. The threaded screw passes through the sleeve, with its upper end connected to the pressure block and its lower part threaded for installing the clamping nut. The limiting component is installed on the side of the sleeve near the handle and has an downward-facing "L"-shaped limiting groove. A limiting bolt is installed on the side of the pressure block near the limiting component. This limiting bolt is engaged in the "L"-shaped limiting groove and can slide within it. When the locking assembly is not in operation, the limiting bolt is located in the horizontal groove of the "L"-shaped limiting groove, and the pressure block is away from the target flange. When in operation, tightening the clamping nut controls the threaded screw to move downward. The rotation of the threaded screw causes the limiting bolt on the pressure block to gradually move from the horizontal groove to the vertical groove, thus causing the pressure block to move downward until it clamps the target flange.

[0007] Furthermore, a sealing assembly is provided at the sealing surface of the receiving flange, which includes a main seal and a secondary seal, wherein the main seal is located inside the secondary seal.

[0008] Furthermore, the main sealing element is an energy storage sealing ring, and it is fixed by a plurality of sealing ring anti-drop structures.

[0009] Furthermore, the sealing ring anti-drop structure includes a baffle base, a baffle, and an adjusting bolt. The baffle base is installed on the receiving flange, and the baffle is fixed to the baffle base by the adjusting bolt to press and fix the main sealing element.

[0010] Further, the locking device further comprises a spring, the upper half of the threaded screw rod is larger than the lower half, forming a boss, the spring is sleeved on the lower half of the threaded screw rod, one end of the spring is connected to the boss, and the other end of the spring is connected to a boss arranged on the inner side of the bottom of the sleeve; when the threaded screw rod is controlled to move downward by rotating the compression nut, the spring is compressed and generates a rotating force, so that the pressing block moves downward along the limiting groove and rotates to a position directly above the target flange; when the LNG conveying operation is completed and the separation operation of the target flange and the manual quick connecting device is performed, the spring is elongated and generates a rotating force, pushing the threaded screw rod to drive the pressing block to move upward along the limiting groove, and driving the pressing block to rotate to a position away from directly above the target flange.

[0011] Further, the locking device further comprises a drop-proof nut arranged at the lower end of the threaded screw rod, used for preventing the compression nut from falling off.

[0012] Further, the locking device further comprises a gasket arranged between the sleeve and the compression nut.

[0013] Further, the locking device further comprises a heat insulation pad arranged on the upper surface of the base.

[0014] Further, the guide arm is fixed to the ship connection flange through bolts.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] (1) The device is provided with a circular handle, which is more convenient for the staff to make fine adjustments, and can reduce unnecessary collisions between the QCDC and the target flange and reduce damage.

[0017] (2) The guide arm can be compatible with a certain position error, so that the QCDC can be connected to flanges of the same size but different specifications.

[0018] (3) The locking device has a simple structure and low cost, can improve the connection and separation efficiency, and the replacement of parts is simple.

[0019] (4) The sealing design includes primary sealing and secondary sealing, wherein the primary sealing is an energy storage sealing ring, and the secondary sealing is a waterproof ring, which can ensure that the energy storage sealing ring is isolated from water vapor in the air during LNG conveying, preventing icing from damaging the system sealing, which not only ensures the sealing property but also reduces the cost.

[0020] (5) The device is designed with a sealing ring drop-proof structure, which can reduce the processing difficulty of the sealing groove of the ship connection flange and the primary sealing ring, and reduce the cost.

[0021] The present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1Figure 1 is a schematic view of a structure of a manual quick connection device for LNG hose delivery system in an embodiment.

[0023] Figure 2 Figure 2 is a schematic view of a locking assembly of a manual quick connection device for LNG hose delivery system in an embodiment, wherein figure (a) is a front view, figure (b) is a side view, figure (c) is a side sectional view, and figure (d) is a perspective view.

[0024] Figure 3 Figure 3 is a schematic view of a guide arm of a manual quick connection device for LNG hose delivery system in an embodiment.

[0025] Figure 4 Figure 4 is a schematic view of a circular handle of a manual quick connection device for LNG hose delivery system in an embodiment.

[0026] Figure 5 Figure 5 is a schematic view of a structure for preventing a sealing ring from falling off of a manual quick connection device for LNG hose delivery system in an embodiment.

[0027] In the figure, the reference signs are as follows: sealing assembly 1, locking assembly 2, guide arm 3, circular handle 4, connecting pipeline 5, hose connecting flange 6, lifting ring 7, ship connecting flange 8, sealing ring falling prevention structure 9; base 2-1, sleeve 2-2, limiting member 2-3, threaded screw 2-4, pressing block 2-5, falling prevention nut 2-6, gasket 2-7, heat insulation pad 2-8, pressing nut 2-9, limiting bolt 2-10, spring 2-11; baffle base 9-1, baffle 9-2, adjusting bolt 9-3. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0029] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0030] In an embodiment, the present application is combined with Figure 1 , Figure 3 and Figure 4The utility model provides a kind of manual quick connecting device suitable for FSRU ship hose conveying system, the device includes ship flange 8, and several guide arms 3 and several sleeve locking parts 2 are uniformly arranged along the outer circle of ship flange 8, the outer side of guide arm is fixedly connected with circular hand 4, and guide arm is all flared to form several angles (angle cannot be too big, prevent not play guiding butt joint effect, angle is too small to affect butt joint efficiency);The ship flange 8 is welded with the one end of connecting pipeline 5 as a whole, and the other end of connecting pipeline 5 is provided with hose connecting flange 6;The guide arm 3 is used to guide the butt joint of ship flange 8 and target flange on the receiving ship, and can be compatible with certain flange butt joint error, and the locking part 2 is used to fix manual quick connecting device and target flange, to ensure the sealing property of LNG hose conveying system, to realize the purpose of safe LNG conveying.

[0031] In combination Figure 2 The locking part 2 includes base 2-1, sleeve 2-2, limiting piece 2-3, threaded screw rod 2-4, pressing block 2-5, pressing nut 2-9 and limiting bolt 2-10;The sleeve 2-2 is fixedly connected on the ship flange 8 by the base 2-1, the threaded screw rod 2-4 penetrates the sleeve 2-2, the upper end of the threaded screw rod 2-4 is connected with the pressing block 2-5, and the lower part is provided with threads for installing the pressing nut 2-9;The limiting piece 2-3 is installed on the side of the sleeve 2-2 close to the hand 4, and an "L"-shaped limiting groove with downward opening is arranged on the limiting piece 2-3;The limiting bolt 2-10 is installed on the side of the pressing block 2-5 close to the limiting piece 2-3, and the limiting bolt 2-10 is clamped in the "L"-shaped limiting groove and can slide in the groove;When the locking part 2 is not working, the limiting bolt 2-10 is located in the horizontal groove in the "L"-shaped limiting groove, and the pressing block 2-5 is away from the target flange;When working, the pressing nut 2-9 is screwed to control the downward movement of the threaded screw rod 2-4, and the rotation of the threaded screw rod 2-4 drives the limiting bolt 2-10 on the pressing block 2-5 to gradually move from the horizontal groove to the vertical groove, that is, drives the pressing block 2-5 to move downward and gradually press the target flange, to ensure the efficient butt joint, safety and sealing performance of the whole low-temperature hose conveying system.

[0032] Here, the locking part has simple structure and low cost, can improve the butt joint and separation efficiency, and the component replacement is simple.

[0033] The working principle of the present application is as follows: when the FSRU ship is carrying out LNG delivery, the hose system is delivered to the target ship by using the hose lifting device, and the workers operate the QCDC to realize the docking between the two ships. When docking, the QCDC is in close proximity to the target flange, the workers operate the circular hand to approach the target flange, the guide arm guides the docking, the QCDC end face flange and the target flange gradually contact, the workers rotate the compression nut to control the compression block to slowly approach the target flange until compression, and the operation is repeated for several times until all the locking parts are compressed to the target flange to realize the docking of the QCDC and the target flange. After the LNG delivery is completed, when it is cooled to room temperature, the compression nut is rotated to adjust the compression block to move upward, and the QCDC and the target flange are separated.

[0034] Further, in one of the embodiments, a sealing assembly 1 is arranged at the sealing surface of the docking flange 8, which includes a primary sealing member and a secondary sealing member, wherein the primary sealing member is arranged inside the secondary sealing member. Preferably, the primary sealing member is an energy storage sealing ring, which is fixed by a plurality of sealing ring anti-falling structures 9, and the secondary sealing member is a waterproof ring, which can isolate the energy storage sealing ring from air moisture during LNG delivery, preventing icing from damaging the system sealing. This design not only ensures the sealing property, but also reduces the cost.

[0035] Further, in one of the embodiments, the sealing ring anti-falling structure 9 includes a baffle base 9-1, a baffle 9-2 and an adjusting bolt 9-3, the baffle base 9-1 is arranged on the docking flange 8, and the baffle 9-2 is fixed on the baffle base 9-1 by the adjusting bolt 9-3 to press and fix the primary sealing member.

[0036] Here, by designing the sealing ring anti-falling structure, the processing difficulty of the docking flange sealing groove and the primary sealing ring can be reduced, and the cost can be reduced.

[0037] Further, in one of the embodiments, the locking part 2 further includes a spring 2-11, the upper half of the threaded screw rod 2-4 is larger than the lower half to form a boss, the spring 2-11 is sleeved on the lower half of the threaded screw rod 2-4, one end of the spring 2-11 is connected to the boss, and the other end of the spring 2-11 is connected to a boss arranged on the inner side of the bottom of the sleeve 2-2; when the compression nut 2-9 is rotated to control the downward movement of the threaded screw rod 2-4, the spring 2-11 is compressed and generates a rotating force, so that the compression block 2-5 moves downward along the limiting groove while rotating to a position directly above the target flange; when the LNG delivery operation is completed and the target flange and the manual quick connecting device are separated, the spring 2-11 is elongated and generates a rotating force, which pushes the threaded screw rod 2-4 to drive the compression block 2-5 to move upward along the limiting groove while rotating to a position away from directly above the target flange.

[0038] Further, in one embodiment, the locking assembly 2 further comprises a drop-proof nut 2-6 mounted on the lower end of the threaded screw 2-4 to prevent the compression nut 2-9 from falling off.

[0039] Further, in one embodiment, the locking assembly 2 further comprises a gasket 2-7 disposed between the sleeve 2-2 and the compression nut 2-9 to provide a pre-tightening force to prevent the compression nut 2-9 from loosening at low temperature.

[0040] Further, in one embodiment, the locking assembly 2 further comprises a heat insulation pad 2-8 disposed on the upper surface of the base 2-1 to prevent the heat from the flange 8 of the pipe from being directly transferred to the locking assembly, thereby causing the compression nut 2-9 in the locking assembly to loosen.

[0041] The new manual quick connection device is provided with a circular hand for conveniently adjusting the position of the QCDC by personnel, a guide arm for guiding the butt joint to reduce the operation time, and a simple locking assembly structure, low cost, simple replacement, high butt joint and separation efficiency, and high reliability.

[0042] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel, characterized in that, The device comprises a docking flange (8), a plurality of guide arms (3) and a plurality of locking assemblies (2) arranged uniformly along the outer circle of the docking flange (8), the outer circle of the guide arms is fixedly connected with a hand (4), and the guide arms are outwardly spread to form a plurality of angles; the docking flange (8) is integrally welded with one end of a connecting pipeline (5), and the other end of the connecting pipeline (5) is provided with a hose connecting flange (6); the guide arms (3) are used to guide the docking flange (8) to butt joint with a target flange on a receiving ship, and the locking assemblies (2) are used to fix the manual quick connecting device and the target flange, so as to ensure the sealing property of the LNG hose conveying system. The locking assembly (2) comprises a base (2-1), a sleeve (2-2), a limiting piece (2-3), a threaded screw rod (2-4), a pressing block (2-5), a pressing nut (2-9) and a limiting bolt (2-10); the sleeve (2-2) is fixedly connected with the docking flange (8) through the base (2-1); the threaded screw rod (2-4) penetrates through the sleeve (2-2), the upper end of the threaded screw rod (2-4) is connected with the pressing block (2-5), and the lower part is provided with threads for mounting the pressing nut (2-9); the limiting piece (2-3) is mounted on the sleeve (2-2) and close to the side of the hand (4), and the limiting piece (2-3) is provided with an "L"-shaped limiting groove with an opening downward; the pressing block (2-5) is provided with the limiting bolt (2-10) on the side close to the limiting piece (2-3), the limiting bolt (2-10) is clamped in the "L"-shaped limiting groove and can slide in the groove; when the locking assembly (2) is not working, the limiting bolt (2-10) is located in the horizontal groove in the "L"-shaped limiting groove, and the pressing block (2-5) is away from the target flange; when working, the pressing nut (2-9) is screwed to control the downward movement of the threaded screw rod (2-4), the rotation of the threaded screw rod (2-4) drives the limiting bolt (2-10) on the pressing block (2-5) to gradually move from the horizontal groove to the vertical groove, that is, to drive the pressing block (2-5) to move downward until the target flange is pressed tightly.

2. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 1, characterized in that, The docking flange (8) is provided with a sealing assembly (1) at the sealing surface, and the assembly comprises a primary sealing piece and a secondary sealing piece, wherein the primary sealing piece is located inside the secondary sealing piece.

3. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 2, characterized in that, The primary sealing piece is an energy storage sealing ring and is fixed through a plurality of sealing ring anti-falling structures (9), and the secondary sealing piece is a waterproof ring.

4. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 3, characterized in that, The sealing ring anti-falling structure (9) comprises a baffle base (9-1), a baffle (9-2) and an adjusting bolt (9-3), the baffle base (9-1) is mounted on the docking flange (8), the baffle (9-2) is fixed on the baffle base (9-1) through the adjusting bolt (9-3), and is used to press the primary sealing piece.

5. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel as claimed in claim 1, characterized in that, The locking assembly (2) further comprises a spring (2-11), the upper half of the threaded screw rod (2-4) is larger than the lower half, forming a boss, the spring (2-11) is sleeved on the lower half of the threaded screw rod (2-4), one end of the spring (2-11) is connected with the boss, and the other end is connected with a boss arranged inside the bottom of the sleeve (2-2).

6. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 5, characterized in that, When the screwing-up nut (2-9) controls the downward movement of the threaded screw rod (2-4), the spring (2-11) is compressed and generates a rotating force, so that the pressing block (2-5) moves downward along the limiting groove while rotating to a position right above the target flange; when the LNG delivery operation ends and the separation operation of the target flange and the manual quick connecting device is performed, the spring (2-11) is elongated and generates a rotating force, which pushes the threaded screw rod (2-4) to drive the pressing block (2-5) to move upward along the limiting groove while rotating to a position away from the target flange.

7. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 5, characterized in that, The locking device (2) further comprises a drop-proof nut (2-6) mounted at the lower end of the threaded screw rod (2-4), which is used to prevent the pressing nut (2-9) from falling off.

8. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 7, characterized in that, The locking device (2) further comprises a gasket (2-7) arranged between the sleeve (2-2) and the pressing nut (2-9).

9. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel according to claim 8, characterized in that, The locking device (2) further comprises a heat insulation pad (2-8) arranged on the upper surface of the base (2-1).

10. A manual quick connect device suitable for use in a hose handling system of an FSRU vessel as claimed in claim 1, characterized in that, The guide arm (3) is fixed to the ship connecting flange (8) by bolts.

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