Anti-falling device suitable for hose saddle and using method

Abstract

The invention provides an anti-falling device suitable for a hose saddle and a using method. The device comprises a box body, a descent control device, a rope winding mechanism, a descent control rope and a guider. The device is arranged in the hose saddle, and the slow descending rope is connected with a hose in the hose conveying system. When the hose conveying system breaks away emergently, the hose begins to fall under the action of self weight, the falling load is transmitted to the anti-falling device through the slow descending rope connected with the hose, the anti-falling device is driven to operate, the accelerated falling trend of the hose is effectively restrained through gear speed change and frictional resistance, and therefore the slow descending function of the hose is achieved. The device is simple in structure and easy to maintain, out-of-control falling of the hose is reliably prevented on the basis of a gear speed change mechanism and a friction damping principle, the purposes of hose falling prevention and slow descending are achieved, and the safety of a hose conveying system in the hose falling process after emergency separation is remarkably improved.

Description

Technical Field

[0001] This invention relates to a fall prevention device in a hose delivery system, and particularly to a fall prevention device suitable for a hose saddle and its method of use. Background Technology

[0002] LNG transportation and transshipment at sea is an effective energy transfer method. In recent years, with the rapid growth in demand for LNG clean energy, the demand for LNG transportation and transshipment at sea has also been increasing. Hose delivery systems connect LNG bunkering vessels and receiving vessels via hoses, and are the main method for LNG transportation and transshipment. To cope with extreme or sudden emergencies, hose delivery systems must have emergency disconnection capabilities to enable rapid separation of the hose delivery system between the LNG bunkering vessel and the receiving vessel in emergency situations.

[0003] After an emergency detachment, the hose in a hose delivery system may fall rapidly under its own weight, potentially colliding with the hull and causing damage, or leading to secondary hazards such as fluid leakage. Therefore, hose delivery systems are generally equipped with anti-fall devices. These devices use reverse resistance generated during movement to prevent the hose from falling rapidly after detachment. However, existing anti-fall devices typically rely on hydraulic systems to generate this resistance, resulting in complex structures and difficult maintenance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a fall prevention device and method for use suitable for hose saddles. The device is placed inside the hose saddle and uses gear speed change and frictional resistance to prevent the hose from accelerating downward, thereby achieving the purpose of slow descent and fall prevention. This simplifies the device structure and makes it easy to maintain.

[0005] The technical solution to achieve the purpose of this invention is as follows:

[0006] A fall arrest device suitable for a flexible hose saddle includes a housing, a descent device, a rope winding mechanism, a descent rope, and a guide.

[0007] The housing is used to provide structural support for the entire fall arrest device;

[0008] The descent device is installed inside the upper part of the box and is used to provide a reverse force to the descent rope in the direction of movement;

[0009] The rope winding mechanism is rolled inside the box, away from the outlet end, and located below the decelerator, for storing the deceleration rope;

[0010] The guide is installed inside the housing near the outlet end, below the descent device, and is used to provide outlet guidance for the descent rope.

[0011] Furthermore, the box body has an opening at the top, and two support blocks are symmetrically arranged on both sides of the opening for connecting the decelerator;

[0012] Furthermore, the aforementioned descent device includes a housing, a fixing frame, a rope loop, a transmission mechanism, a rotating shaft, a damping component, a friction ring, and a guide component;

[0013] The mounting bracket is installed at the top of the outer shell and is used to connect the descent device to the housing.

[0014] The rope loop is rotatably mounted on the housing;

[0015] The rotating shaft can rotate relative to the housing;

[0016] The transmission mechanism is installed inside the rope loop, such that the rotation direction of the rotating shaft is opposite to the rotation direction of the rope loop.

[0017] The damping element is rotatably mounted on the housing and separated from the rope loop by a partition, providing a reverse force in the direction of rotation to the rotating shaft;

[0018] The friction ring is fixedly installed on the housing and arranged on the outside of the damping element to provide the damping element with a reverse frictional force in the direction of rotation.

[0019] The guide component is installed at the bottom inside the housing and is used to provide inlet and outlet guidance for the descent rope (4).

[0020] Furthermore, a rotary guide groove is machined on the outer side of the rope loop to increase the friction between the rope loop and the descent rope, so that it maintains static friction.

[0021] Furthermore, the damping component includes a connecting disc, a sleeve, a friction element, a side claw, and a connecting shaft;

[0022] The connecting discs are two in number and are fixedly installed on both sides of the sleeve, and are simultaneously fitted onto the rotating shaft along with the sleeve.

[0023] Multiple claws are arranged along the circumferential direction and are rotatably connected to the connecting disk via a connecting shaft.

[0024] The friction element, the same number as the number of the side claws, is installed at the front end of the side claws;

[0025] The friction element can be installed in a slot at the front end of the claw, with the friction element fixedly installed in the slot at the front end of the claw; or the front end of the claw can be configured as a connecting shaft, with the friction element rollingly installed on the connecting shaft.

[0026] Furthermore, the rope winding mechanism includes a support rod, a pad, a baffle, a roller, and a rope clamp;

[0027] The support rods are in the form of two, with one end threaded and connected to the roller via the thread. They are respectively set on both sides of the roller, and the other end is machined with a bayonet for roller installation and rotation adjustment.

[0028] The pads, numbering four, pass through the support rod and are symmetrically arranged in pairs on the outside of the baffle, with the two pads on the same side respectively arranged inside and outside the box;

[0029] The baffle has an opening at its edge for securing the descent rope.

[0030] The rope clamp is fixedly installed below the opening on the outside of the baffle and is used to secure the descent rope.

[0031] Furthermore, the rope clamp is equipped with a break bolt for securing the descent rope.

[0032] Furthermore, the guide can be a roller type, installed on both sides of the box, or it can be a wheel type, installed on the bottom plate of the box via a roller frame.

[0033] Furthermore, the two ends of the support rod are of different thicknesses. The end connected to the pad has a thinner rod diameter, while the end with the locking slot has a thicker rod diameter. When the pad is pressed against the locking slot end, the pad is gradually compressed as the support rod is screwed into the roller.

[0034] A method for using a fall arrestor suitable for a flexible hose saddle includes: fixing a descent rope to a drum, passing it sequentially through a descent device and a guide, and connecting it to an external flexible hose; controlling the descent speed of the flexible hose through the descent device; when the descent rope is pulled by tension and causes the rope loop to rotate, a transmission mechanism transmits the rotation of the rope loop to a rotating shaft; when the rotating shaft rotates, it drives the sleeve of the damping component, the connecting disc, and the connecting shaft to rotate synchronously; the friction element on the side claw is thrown outward under the action of centrifugal force, pressing and fixing the friction ring, generating a friction torque opposite to the direction of rotation, and suppressing the rotational speed of the rotating shaft.

[0035] The significant advantages of this invention compared to existing technologies are:

[0036] (1) The present invention is placed inside the hose saddle and uses gear speed change and friction resistance to prevent the hose from accelerating downward, thereby achieving the purpose of hose anti-fall and slow descent;

[0037] (2) The present invention provides a simple and easy-to-maintain anti-fall device suitable for hose saddles;

[0038] (3) The descent rope (4) of the present invention has the function of disengaging from the rope winding mechanism at the end of the stroke, which further improves the safety of the fall prevention device itself. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the fall protection device of the present invention;

[0040] Figure 2 This is a schematic diagram of the box structure of the fall protection device of the present invention;

[0041] Figure 3 This is a schematic diagram of the decelerator structure of the present invention;

[0042] Figure 4 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0043] Figure 5 This is a schematic diagram of the damping component structure of the present invention;

[0044] Figure 6 Schematic diagram of the guide component structure of this invention

[0045] Figure 7 This is a schematic diagram of the rope winding mechanism of the present invention;

[0046] Figure 8 This is a schematic diagram of the rope clamping device of the present invention.

[0047] Figure label:

[0048] 1. Housing; 2. Descending device; 3. Rope winding mechanism; 4. Descending rope; 5. Guide; 2-1. Shell; 2-2. Fixing frame; 2-3. Rope winding ring; 2-4. Transmission mechanism; 2-5. Rotating shaft; 2-6. Damping component; 2-7. Friction ring; 2-8. Guide component; 2-41. Sun gear; 2-42. Planetary gear; 2-43. Internal gear ring; 2-61. Connecting disc; 2-62. Sleeve; 2-63. Friction component; 2-64. Side claw; 2-65. Connecting shaft; 2-81. Column; 2-82. Rear roller; 2-83. Front roller; 3-1. Support rod; 3-2. Pad; 3-3. Baffle; 3-4. Roller; 3-5. Rope clamp; 3-51. Break bolt. Specific Implementation

[0049] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0050] In this embodiment, as Figure 1 A fall arrestor suitable for a flexible hose saddle is disclosed. The device includes a housing 1, a descent device 2, a rope winding mechanism 3, a descent rope 4, and a guide 5. The housing 1 provides structural support for the entire fall arrestor. The descent device 2 is installed inside the upper part of the housing 1 to provide a reverse force to the descent rope 4 in the direction of movement. The rope winding mechanism 3 is rolled inside the housing 1, away from the exit end and located below the descent device 2, to store the descent rope 4. The guide 5 is installed inside the housing 1, near the exit end and located below the descent device 2, to provide exit guidance for the descent rope 4.

[0051] Specifically, the guide 5 can be a roller type, which has strong load-bearing capacity and good wear resistance, and is installed on both sides of the housing 1. Alternatively, it can be a roller type, which is more flexible and is installed on the bottom plate of the housing 1 via a roller frame.

[0052] like Figure 2 The housing 1 includes a support block 1-1, a top plate 1-2, a side plate 1-3, and a bottom plate 1-4. The top plate 1-2 has an opening in the middle, and two support blocks 1-1 are symmetrically arranged on both sides of the opening for connecting the decelerator 2.

[0053] like Figure 3 The decelerator 2 includes a housing 2-1, a fixing frame 2-2, a rope loop 2-3, a transmission mechanism 2-4, a rotating shaft 2-5, a damping component 2-6, a friction ring 2-7, and a guide component 2-8. The components are as follows: a fixed bracket 2-2 is installed on the top of the outer shell 2-1 to connect the descent device 2 to the housing 1; a rope loop 2-3 is rotatably installed on the shell 2-1; a rotating shaft 2-5 can rotate relative to the shell 2-1; a transmission mechanism 2-4 is installed inside the rope loop 2-3, so that the rotation direction of the rotating shaft 2-5 is opposite to the rotation direction of the rope loop 2-3; a damping element 2-6 is rotatably installed on the shell 2-1, separated from the rope loop 2-3 by a partition, and provides a reverse force in the rotation direction of the rotating shaft 2-5; a friction ring 2-7 is fixedly installed on the shell 2-1, arranged outside the damping element 2-6, and provides a reverse friction force in the rotation direction of the damping element 2-6; and a guide element 2-8 is installed at the bottom of the inner shell 2-1 to provide inlet and outlet guidance for the descent rope 4.

[0054] Specifically, such as Figure 4 The outer side of the rope loop 2-3 is machined with a rotation guide groove to increase the friction between the rope loop 2-3 and the descent rope 4, maintaining static friction. The transmission mechanism 2-4 includes a sun gear 2-41, planet gears 2-42, and an internal gear ring 2-43. The internal gear ring 2-43 is installed inside the rope loop 2-3. The sun gear 2-41 is fixed to the rotating shaft 2-5, and the planet gears 2-42 are fixed to the vertical shaft and mesh with the sun gear 2-41 and the internal gear ring 2-43. The vertical shaft is fixed to the housing 2-1. The diameter of the planet gears 2-42 is larger than that of the sun gear 2-41, and the number of teeth on the planet gears 2-42 is greater than that on the sun gear 2-41. This results in the rotational speed of the rope loop 2-3 being lower than that of the rotating shaft 2-5, allowing the damping element 2-6 to more effectively counteract the tension of the descent rope 4 and enhance descent stability.

[0055] Specifically, such as Figure 5The damping component 2-6 includes a connecting disc 2-61, a sleeve 2-62, a friction element 2-63, side claws 2-64, and a connecting shaft 2-65. Two connecting discs 2-61 are fixedly installed at both ends of the sleeve 2-62 and simultaneously fitted onto the rotating shaft 2-5. Multiple side claws 2-64 are arranged circumferentially and are rotatably connected to the connecting discs 2-61 via the connecting shaft 2-65. The number of friction elements 2-63 is the same as the number of side claws 2-64, and they are installed at the front end of the side claws 2-64. Under high-speed rotation, the friction elements 2-63, due to centrifugal force, press against the aforementioned friction ring 2-7, generating a resistance torque that pulls the side claws 2-64 to reduce speed. This, in turn, pulls the connecting shaft 2-65, connecting discs 2-61, and sleeve 2-62 to reduce speed, thereby suppressing the rotational speed of the aforementioned rotating shaft 2-5.

[0056] The friction element 2-63 can be installed in a slot at the front end of the claw 2-64, with the friction element 2-63 fixedly installed in the slot at the front end of the claw 2-64; or the front end of the claw 2-64 can be configured as a connecting shaft, with the friction element 2-63 rollingly installed on the connecting shaft.

[0057] Specifically, such as Figure 6 The guide component 2-8 includes a column 2-81, a rear roller 2-82, and a front roller 2-83. The column 2-81 is fixedly mounted on the housing 2-1; there are three columns 2-81, two rear rollers 2-82, which are rotatably mounted on the two rear columns 2-81; and one front roller 2-83, which is rotatably mounted on the front column 2-81. The descent rope enters and exits from both sides of the front roller. The different numbers of rear and front rollers are mainly for planning the rope's path. The rear rollers prevent wear between the descent rope and the housing, while the front rollers separate the descent rope and prevent it from tangling.

[0058] like Figure 7 The rope winding mechanism 3 includes support rods 3-1, pads 3-2, baffles 3-3, rollers 3-4, and rope clamps 3-5. There are two support rods 3-1, one end of which is threaded and connected to the rollers 3-4 via threads. They are respectively positioned on both sides of the rollers 3-4. The other end has a locking slot for the installation and rotation adjustment of the rollers 3-4. Specifically, the rollers 3-4 are first placed inside the housing 1, and then the support rods 3-1 are inserted from outside the housing 1 and connected to the rollers 3-4 via threads. During the connection process, the locking slot provides a force application point. There are four pads 3-2, which pass through the support rods 3-1 and are symmetrically positioned in pairs on the outside of the baffles 3-3. The two pads on the same side are respectively positioned inside and outside the housing 1. The edge of the baffles 3-3 has an opening for fixing the descent rope 4. The rope clamps 3-5 are fixedly installed below the opening on the outside of the baffles 3-3 for fixing the descent rope 4.

[0059] The support rod 3-1 has different diameters at both ends. The end that connects to the pad 3-2 has a thinner diameter, while the end with the locking tab has a thicker diameter. When the pad 3-2 comes into contact with the locking tab, the pad 3-2 is gradually pressed tight as the support rod 3-1 is screwed into the roller.

[0060] Specifically, such as Figure 8 The rope clamp 3-5 includes a left clamping block 3-51, a fixing bolt 3-52, a right clamping block 3-53, and a break bolt 3-54. The fixing clamping block 3-52 is used to fix the rope clamp 3-5 to the baffle 3-3. The break bolt 3-54 is used to fix the descent rope 4. The right clamping block 3-53 is connected to the left clamping block 3-51 via the break bolt 4. The descent rope 4 is fixed by rotating the break bolt 3-54. When the tension of the descent rope 4 is too great, the break bolt 3-54 breaks, and the descent rope 4 comes out, preventing the entire fall arrest device from being damaged by excessive tension.

[0061] Instructions for use: The descent rope 4 is fixed on the rollers 3-4, passes through the descent device 2 and the guide device 5 in sequence, and is connected to the external hose. The descent speed of the hose is controlled by the descent device 2.

[0062] Specifically, the working principle of the decelerator 2 is as follows: when the deceleration rope 4 is pulled by tension and drives the rope loop 2-3 to rotate, the transmission mechanism 2-4 transmits the rotation of the rope loop to the rotating shaft 2-5; when the rotating shaft 2-5 rotates, it drives the sleeve 2-62 of the damping component 2-6, the connecting plate 2-61 and the connecting shaft 2-65 to rotate synchronously; the friction component 2-63 on the side claw 2-64 is thrown outward under the action of centrifugal force, pressing and fixing the friction ring 2-7, generating a friction torque opposite to the direction of rotation, suppressing the rotation speed of the rotating shaft 2-5; the higher the rotation speed, the greater the centrifugal force, and the stronger the friction braking force, forming a negative feedback adjustment to ensure the stability of the deceleration speed.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fall arrestor suitable for a flexible hose saddle, characterized in that, It includes a housing (1), a descent device (2), a rope winding mechanism (3), a descent rope (4), and a guide (5); The housing (1) is used to provide structural support for the entire fall arrest device; The descent device (2) is installed inside the upper part of the box (1) and is used to provide the descent rope (4) with a reverse force in the direction of motion; The rope winding mechanism (3) is rolled inside the box (1) away from the outlet end and located below the decelerator (2) for storing the deceleration rope (4); The guide (5) is installed inside the housing (1) near the outlet end, below the descent device (2), and is used to provide outlet guidance for the descent rope (4).

2. The fall arrest device for a flexible hose saddle according to claim 1, characterized in that, The box (1) has an opening at the top, and two support blocks (1-1) are symmetrically arranged on both sides of the opening for connecting the descent device (2).

3. The fall arrest device for a flexible hose saddle according to claim 1, characterized in that, The descent device (2) includes a housing (2-1), a fixing frame (2-2), a rope loop (2-3), a transmission mechanism (2-4), a rotating shaft (2-5), a damping element (2-6), a friction ring (2-7), and a guide element (2-8); The fixing frame (2-2) is installed on the top of the outer side of the housing (2-1) and is used to connect the descent device (2) and the box (1); The rope loop (2-3) is rotatably mounted on the housing (2-1); The rotating shaft (2-5) can rotate relative to the housing (2-1); The transmission mechanism (2-4) is installed inside the rope loop (2-3) so that the rotation direction of the rotating shaft (2-5) is opposite to the rotation direction of the rope loop (2-3); The damping element (2-6) is rotatably mounted on the housing (2-1) and separated from the rope loop (2-3) by a partition, providing a reverse force in the direction of rotation to the rotating shaft (2-5); The friction ring (2-7) is fixedly installed on the housing (2-1) and arranged outside the damping member (2-6) to provide the damping member (2-6) with a reverse frictional force in the direction of rotation; The guide (2-8) is installed at the bottom inside the housing (2-1) and is used to provide inlet and outlet guidance for the descent rope (4).

4. The fall arrestor (2) for a flexible saddle according to claim 3, characterized in that, The outer side of the rope loop (2-3) is machined with a rotary guide groove to increase the friction between the rope loop (2-3) and the descent rope (4) and keep it in static friction.

5. The fall arrest device for a flexible hose saddle according to claim 3, characterized in that, The damping component (2-6) includes a connecting disc (2-61), a sleeve (2-62), a friction component (2-63), a claw (2-64), and a connecting shaft (2-65); The connecting discs (2-61) are two in number and are fixedly installed at both ends of the sleeve (2-62), and are simultaneously fitted onto the rotating shaft (2-5) along with the sleeve (2-62); Multiple claws (2-64) are arranged along the circumferential direction and are rotatably connected to the connecting disk (2-61) via a connecting shaft (2-65); The number of friction elements (2-63) is the same as the number of edge claws (2-64), and they are installed at the front end of the edge claws (2-64).

6. The fall arrest device for a flexible hose saddle according to claim 1, characterized in that, The rope winding mechanism (3) includes a support rod (3-1), a pad (3-2), a baffle (3-3), a roller (3-4), and a rope clamp (3-5); The support rod (3-1) consists of two rods, one end of which is threaded and connected to the roller (3-4) via threads. The rods are respectively set on both sides of the roller (3-4), and the end of which is machined with a bayonet for roller (3-4) installation and rotation adjustment. The pads (3-2) number four, pass through the support rod (3-1), and are symmetrically arranged in pairs on the outside of the baffle (3-3). The two pads on the same side are respectively arranged inside and outside the box (1); The baffle (3-3) has an opening at its edge for fixing the descent rope (4); The rope clamp (3-5) is fixedly installed below the opening on the outside of the baffle (3-3) for fixing the descent rope (4).

7. The fall arrest device for a hose saddle according to claim 6, the rope winding mechanism (3), wherein the rope clamp (3-5) is provided with a pull-out bolt (3-51) for fixing the descent rope (4).

8. The fall arrestor for a flexible hose saddle according to claim 6, characterized in that, The support rod (3-1) has different diameters at both ends. The end that connects to the pad (3-2) has a thinner diameter, while the end with the slot has a thicker diameter. When the pad (3-2) comes into contact with the slot end, the pad (3-2) is gradually pressed tight as the support rod (3-1) is screwed into the roller.

9. The fall arrestor for a flexible hose saddle according to claim 1, characterized in that, The guide (5) is either a roller type or a wheel type. The roller type is installed on both sides of the box (1), and the wheel type is installed on the bottom plate of the box (1) through a roller frame.

10. A method of using the fall arrest device according to any one of claims 1-9, characterized in that, include: The descent rope is fixed to the drum, passes through the decelerator and guide in sequence, and is connected to the external hose. The descent speed of the hose is controlled by the decelerator. When the descent rope is pulled by tension and the rope loop rotates, the transmission mechanism transmits the rotation of the rope loop to the rotating shaft. When the rotating shaft rotates, it drives the sleeve of the damping component, the connecting plate and the connecting shaft to rotate synchronously. The friction components on the side claws are thrown outward under the action of centrifugal force, pressing and fixing the friction ring, generating a friction torque in the opposite direction of rotation, and suppressing the rotation speed of the rotating shaft.

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