Emergency release device for oil tank

Abstract

The present application relates to a kind of oil tank emergency release device, including fixed support, sliding support and release pin, wherein the oil tank to be released is placed on sliding support, fixed support is fixed on the deck of drilling platform, sliding support is arranged on fixed support, release pin is connected with release unit, release unit is used to drive release pin to move, to make release pin fix sliding support on fixed support, or make sliding support disengage from release pin, sliding support can fall into sea after disengaging from release pin, to make oil tank fall into sea.The present application meets the emergency relief requirement of oil tank, effectively solves the problem of large safety hazard and insufficient reliability of traditional device, and is suitable for emergency release of oil tank of various drilling platforms.

Description

Technical Field

[0001] This invention belongs to the technical field of emergency safety equipment for aviation fuel storage on offshore drilling platforms, specifically relating to an emergency release device for oil tanks. Background Technology

[0002] With the increasing demand for air transport from offshore drilling platforms, the emergency safety of oil tanks, as key fuel storage equipment, has become a core focus of platform operation. Specifically, oil tanks must be equipped with emergency release devices to prevent secondary hazards caused by sudden accidents such as fires and explosions, and to ensure the safety of personnel and equipment.

[0003] While existing drilling platforms' oil tanks are equipped with emergency release pins, they suffer from significant technical defects: First, the release operation requires personnel to strike the pin at close range. When the oil tank shows signs of leakage or overheating, personnel approaching the site face the risk of explosion and fire, posing a significant safety hazard. Second, traditional release structures rely on a single locking design, failing to consider the impact of sea salt spray corrosion and wave vibration on the resistance to pin removal, which may lead to release failure in emergencies. Third, some improved devices rely on platform power supply or centralized hydraulic systems, which are prone to malfunction under extreme conditions such as platform power outages or hydraulic system failures, failing to meet the reliability requirements of emergency equipment.

[0004] Therefore, developing an emergency release device for oil tanks that requires no external power, can be operated remotely, and is adapted to harsh marine environments has become the key to solving the pain points of existing technologies. Summary of the Invention

[0005] In order to solve all or some of the above problems, the present invention aims to provide an emergency release device for oil tanks. The emergency release device of the present invention can release oil tanks in emergency situations, and the release process is simple to operate and does not require close contact with the oil tank.

[0006] According to one aspect of the present invention, an emergency release device for an oil tank is provided, comprising a fixed support, a sliding support, and a release pin, wherein the oil tank to be released is placed on the sliding support, the fixed support is fixed to the deck of a drilling platform, the sliding support is disposed on the fixed support, and the release pin is connected to a release unit, the release unit being used to drive the release pin to move, so that the release pin fixes the sliding support to the fixed support, or causes the sliding support to detach from the release pin, wherein the sliding support, after detaching from the release pin, can fall into the sea, so that the oil tank falls into the sea.

[0007] Furthermore, the fixed bracket includes an upper plane and an inclined plane connected to one side of the upper plane. After the sliding bracket is fixed to the fixed bracket by the release pin, a part of the sliding bracket is located on the upper plane and another part is located above the inclined plane. After the sliding bracket is released from the release pin, the sliding bracket slides down the inclined plane into the sea under the action of gravity.

[0008] Furthermore, a slide rail is fixedly provided on the inclined surface, and a slider that cooperates with the slide rail is fixed on the sliding bracket. After the sliding bracket is fixed on the fixed bracket by the release pin, the slider is located above the inclined surface. After the sliding bracket is released from the release pin, the slider falls into the slide rail. A wear-resistant layer is provided on the slide rail, and the angle between the inclined surface and the horizontal plane is 15°-30°.

[0009] Furthermore, two fixing ears are fixedly connected to the other side of the upper plane. Each of the two fixing ears is provided with a pin hole that mates with the release pin. The release pin is located in the pin hole. A fixing plate is fixedly connected to the sliding bracket. The fixing plate is provided with a mating hole that mates with the release pin.

[0010] Furthermore, the fixed plate has an opening communicating with the mating hole, the width of the opening being smaller than the diameter of the mating hole. The release pin includes a first diameter segment and a second diameter segment connected to the first diameter segment. The second diameter segment mates with the opening, and the first diameter segment mates with the mating hole. When the release pin moves to the point where the second diameter segment is located within the mating hole, the sliding bracket rotates under gravity until the fixed plate disengages from the release pin through the opening.

[0011] Furthermore, the fixed bracket is made of Q345B material and is fixed to the drilling platform deck by welding. The surface of the fixed bracket is provided with an anti-corrosion layer. The sliding bracket is provided with an arc-shaped bearing surface adapted to the oil tank, and an anti-slip rubber pad is provided on the arc-shaped bearing surface.

[0012] Furthermore, the release unit includes an actuator cylinder fixed on the fixed bracket. The piston rod of the actuator cylinder is connected to one end of the release pin. The actuator cylinder is connected to a remote control unit, which controls the movement of the piston rod of the actuator cylinder so as to drive the movement of the release pin through the movement of the piston rod of the actuator cylinder.

[0013] Furthermore, the remote control unit includes a hydraulic pump and a two-position four-way directional valve. The hydraulic pump is connected to the pressure oil inlet of the two-position four-way directional valve, the return port of the two-position four-way directional valve is connected to an oil tank, one working port of the two-position four-way directional valve is connected to one working chamber of the actuator cylinder, and the other working port of the two-position four-way directional valve is connected to the other working chamber of the actuator cylinder.

[0014] Furthermore, the distance between the two-position four-way reversing valve and the oil tank is set to be more than 15 meters, and the two-position four-way reversing valve is located on the upwind side of the oil tank. The two-position four-way reversing valve is equipped with an anti-accidental contact protective cover.

[0015] Furthermore, the piston rod of the actuator cylinder is coaxially fixed to the release pin via a detachable flange joint, the actuator cylinder is fixed to the fixed bracket via a bracket seat, and the hydraulic pump is a manual pump.

[0016] As can be seen from the above technical solution, the emergency release device for oil tanks provided by the present invention has the following beneficial effects: Safety is significantly improved: The remote operation design allows operators to complete the operation from more than 15 meters upwind, completely eliminating the risk of close contact with the oil tank and fundamentally avoiding injury to personnel from oil tank explosions and fires, fully meeting the safety protection requirements of airworthiness standards; the design of the anti-accidental contact shield further reduces the risk of misoperation in non-emergency situations.

[0017] High reliability: The pure mechanical drive mode does not rely on external power supply or hydraulic system. It is powered by an independent manual pump and can still be reliably triggered even in extreme conditions such as platform power failure or system failure, meeting the independent working requirements of the emergency release device; key components are made of salt spray resistant and wear resistant materials, and have passed the 720-hour salt spray aging test without failure, making them suitable for harsh marine environments.

[0018] Highly efficient and smooth release: The actuator cylinder, precisely selected based on experimental data of 1 ton pin pulling force, can provide sufficient pin pulling power, and the 150mm stroke ensures that the release pin is completely disengaged; the wear-resistant coating of the inclined guide rail and the reasonable tilt angle design prevent jamming when the oil tank slides down, and the release response time is ≤2 seconds, meeting the rapid response requirements of emergency release.

[0019] Stable and durable structure: The combined support structure of fixed and sliding supports balances load-bearing stability and release flexibility. The reinforced design of the fixed support and the anti-slip structure of the sliding support ensure that the oil tank is firmly fixed in the wind and waves under normal operating conditions. All connection parts adopt anti-loosening and sealing design, which extends the service life of the equipment at sea and reduces maintenance costs. Attached Figure Description

[0020] Figure 1This is a schematic diagram showing the interaction between the fixed bracket and the sliding bracket when the sliding bracket is in the "locked" state. Figure 2 This is a schematic diagram showing the interaction between the fixed bracket, the sliding bracket, and the fixed plate when the sliding bracket is in the "locked" state. Figure 3 This is a schematic diagram of the fixing plate; Figure 4 This is a schematic diagram showing the connection between the release pin and the release unit. The attached figures are labeled as follows: sliding bracket 01, fixed bracket 02, upper plane 021, inclined plane 022, fixed ear 023, fixed plate 03, mating hole 031, opening 032, release pin 04, second diameter section 041, first diameter section 042, limit block 043, actuator cylinder 05, bracket seat 06, two-position four-way directional valve 07, hydraulic pump 08, oil tank 09. Detailed Implementation

[0021] To better understand the purpose, structure, and function of this invention, a detailed description of an emergency release device for oil tanks according to the present invention will be provided below with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, an emergency release device for an oil tank according to an embodiment of the present invention is illustrated, including a fixed support 02, a sliding support 01, and a release pin 04. The oil tank to be released is placed on the sliding support 01, the fixed support 02 is fixed on the drilling platform deck, the sliding support 01 is disposed on the fixed support 02, and the release pin 04 is connected to a release unit. The release unit is used to drive the release pin 04 to move, so that the release pin 04 fixes the sliding support 01 on the fixed support 02, or causes the sliding support 01 to detach from the release pin 04. After detaching from the release pin 04, the sliding support 01 can fall into the sea, so that the oil tank falls into the sea.

[0023] Specifically, the emergency release device for oil tanks in this embodiment of the invention includes a fixed bracket 02, a sliding bracket 01, a release pin 04, and a release unit. The fixed bracket 02 is fixed to the drilling platform deck by welding. The sliding bracket 01 is mounted on the fixed bracket 02. The release unit is used to move the release pin 04. The movement of the release pin 04 can fix the sliding bracket 01 to the fixed bracket 02. At this time, the sliding bracket 01 cannot move, thereby preventing the sliding bracket 01 from moving accidentally due to wind and waves. The movement of the release pin 04 can also cause the sliding bracket 01 to detach from the release pin 04. After the sliding bracket 01 detaches from the release pin 04, it falls into the sea under its own weight and the weight of the oil tank above it, thereby causing the oil tank to fall into the sea as well. This situation realizes the emergency release of the oil tank when it faces the risk of explosion or fire.

[0024] Specifically, the fixed support 02 includes an upper plane 021 and an inclined plane 022 connected to one side of the upper plane 021. After the sliding support 01 is fixed to the fixed support 02 by the release pin 04, part of the sliding support 01 is located on the upper plane 021 and the other part is located above the inclined plane 022. After the sliding support 01 is released from the release pin 04, the sliding support 01 slides down the inclined plane 022 into the sea under the action of gravity.

[0025] Specifically, in this embodiment of the invention, the upper plane 021 of the fixed bracket 02 is smaller than the bottom plane of the sliding bracket 01. The fixed bracket 02 also includes an inclined plane 022. After the sliding bracket 01 is fixed to the fixed bracket 02 by the release pin 04, a part of the sliding bracket 01 is located on the upper plane 021, and another part is located above the inclined plane 022. At this time, the part of the fixed bracket 02 located above the inclined plane 022 is in a suspended state. When the sliding bracket 01 is disengaged from the release pin 04 by moving the release pin 04, the sliding bracket 01 is no longer fixed to the fixed bracket 02. At this time, the part of the sliding bracket 01 in a suspended state falls under its own weight and the weight of the oil tank above it. Thus, the fall of this part causes the entire sliding bracket 01 to slide down the inclined plane 022 into the sea.

[0026] A slide rail is fixedly installed on the inclined surface 022, and a slider that cooperates with the slide rail is fixed on the sliding bracket 01. After the sliding bracket 01 is fixed on the fixed bracket 02 by the release pin 04, the slider is located above the inclined surface 022. After the sliding bracket 01 is released from the release pin 04, the slider falls into the slide rail.

[0027] The slide rail is provided with a wear-resistant layer, which is, for example, a 0.8mm-1.2mm thick polytetrafluoroethylene wear-resistant coating, wherein the clearance between the slider and the guide rail is controlled at 0.1mm-0.3mm.

[0028] Regarding the inclined plane 022 in this embodiment of the invention, the angle between the inclined plane 022 and the horizontal plane is 15°-30°. In specific implementation, for oil tanks weighing 5-10 tons, for example, the angle between the inclined plane 022 and the horizontal plane is 15°-30°, preferably 20°. For oil tanks weighing more than 10 tons, for example, the angle between the inclined plane 022 and the horizontal plane is 25°-30°. The purpose is to ensure that after the release pin 04 releases the sliding bracket 01, the oil tank can smoothly slide down under the action of gravity.

[0029] Among them, such as Figure 2 , Figure 3 As shown, two fixing ears 023 are fixedly connected to the other side of the upper plane 021. Each fixing ear 023 is provided with a pin hole that cooperates with the release pin 04. The release pin is located in the pin hole. A fixing plate 03 is fixedly connected to the sliding bracket 01. The fixing plate 03 is provided with a mating hole 031 that cooperates with the release pin 04.

[0030] Here, the fixing lug 023 and the inclined surface 022 are located on opposite sides of the upper plane 021, so that the release pin 04 can stably fix the sliding bracket 01 to the fixing bracket 02. Regarding the two fixing lugs 023 in this embodiment, the distance between the two fixing lugs 023 is such that the release pin 04 moves on the track formed by the two pin holes; in this embodiment, the fixing plate 03 is fixed to the sliding bracket 01, and the fixing plate 03 is provided with a mating hole 031 that cooperates with the release pin 04. During the movement of the release pin 04 driven by the release unit, when the release pin 04 extends into the mating hole 031, the sliding bracket 01 is fixed to the fixed bracket 02 through the mating relationship between the release pin 04 and the mating hole 031; when the release pin 04 leaves the mating hole 031, there is no limiting relationship between the release pin 04 and the fixed plate 03, and there is also no limiting relationship between the sliding bracket 01 and the release pin 04. At this time, the sliding bracket 01 is only located on the fixed bracket 02, and part of the sliding bracket 01 is in a suspended state. At this time, the sliding bracket 01 rotates under its own weight and the weight of the oil tank above it until the slider of the sliding bracket 01 falls into the slide rail, and then the sliding bracket 01 slides down the inclined plane 022 into the sea.

[0031] Among them, such as Figure 3 As shown, the fixed plate 03 has an opening 032 communicating with the mating hole 031. The width of the opening 032 is smaller than the diameter of the mating hole 031. The release pin 04 includes a first diameter segment 042 and a second diameter segment 041 connected to the first diameter segment 042. The diameter of the first diameter segment 042 is larger than the diameter of the second diameter segment 041. The second diameter segment 041 mates with the opening 032, and the first diameter segment 042 mates with the mating hole 031. When the release pin 04 moves to the point where the second diameter segment 041 is located in the mating hole 031, the sliding bracket 01 rotates under the action of gravity until the fixed plate 03 disengages from the release pin 04 through the opening 032.

[0032] Regarding the release pin 04 in this embodiment of the invention: when its first diameter segment 042 is located within the mating hole 031 of the fixed plate 03, the sliding bracket 01 and the fixed bracket 02 are locked together by the surface contact between the first diameter segment 042 of the release pin 04 and the mating hole 031. At this time, the release pin 04 is in a "locked" state. By setting a reasonable diameter of the first diameter segment 042 and the thickness of the fixed plate 03, the surface contact area between the first diameter segment 042 and the mating hole 031 can be greater than or equal to 50 cm². However, when its second diameter segment 041 is located within the mating hole 031 of the fixed plate 03, there is no surface contact between the release pin 04 and the mating hole 031. Therefore, the suspended part of the sliding bracket 01 will fall downward, causing the fixed plate 03 to tilt upward. The opening 032 on the fixed plate 03 allows the release pin 04 to pass through. Finally, the fixed plate 03 leaves the release pin through its opening 032 and falls into the sea. At this time, the release pin 04 is in a "released" state.

[0033] In specific implementation, as an alternative, as shown in 3, the first diameter segment 042 can be set at both ends, and the smaller diameter second diameter segment 041 can be set between the two first diameter segments 042.

[0034] The fixed bracket 02 of this embodiment is made of Q345B low alloy high strength steel. The fixed bracket 02 is rigidly fixed to the drilling platform deck by welding. The surface of the fixed bracket 02 is provided with an anti-corrosion layer, which is used to resist the corrosion of the fixed bracket 02 by marine salt spray. Specifically, the anti-corrosion layer is obtained by surface hot-dip galvanizing and passivation treatment, and the thickness of the anti-corrosion layer is ≥80μm.

[0035] For the sliding bracket 01, the sliding bracket 01 is provided with an arc-shaped bearing surface adapted to the oil tank. An anti-slip rubber pad is provided on this arc-shaped bearing surface. Specifically, for example, a diamond-shaped anti-slip rubber pad with a thickness of 5mm-8mm and a Shore hardness of 60-70HA is pasted onto the arc-shaped bearing surface. This anti-slip rubber pad is used to prevent the oil tank from shifting due to wind and wave vibrations. In this embodiment of the invention, the sliding bracket 01 can be configured to return to the fixed bracket 02 after the oil tank enters the sea, as needed. In specific operation, a reset element, such as a spring, can be used to connect the sliding bracket 01 and the fixed bracket 02. For the release pin 04, one end is connected to the aforementioned release unit, and the other end is fixedly connected to a limiting block 043. This limiting block 043 is used to limit the movement of the release pin 04 to prevent it from leaving the two fixed ears 023.

[0036] For the release unit of this embodiment of the invention, such as Figure 4As shown, it includes an actuator cylinder 05 fixed on a fixed bracket 02. The piston rod of the actuator cylinder 05 is connected to one end of a release pin 04. The actuator cylinder 05 is connected to a remote control unit, which is used to control the movement of the piston rod of the actuator cylinder 05, so as to drive the movement of the release pin 04 through the movement of the piston rod of the actuator cylinder 05.

[0037] Specifically, the release unit of this embodiment includes an actuating cylinder 05 and a remote control unit. The actuating cylinder 05 is rigidly connected to the fixed bracket 02 via a bracket seat 06. The bracket seat 06 can be equipped with reinforcing ribs as needed to withstand the axial reaction force when the pin is pulled out. The piston rod of the actuating cylinder 05 is coaxially fixed to the release pin 04 via a detachable flange joint. An oil-resistant nitrile rubber anti-loosening washer can be added to the detachable flange joint as needed. In this embodiment, the coaxiality error between the piston rod of the cylinder and the release pin 04 is controlled to be ≤0.2mm to prevent loosening of the connection due to vibration. The remote control unit is, for example, set at a horizontal straight-line distance ≥15 meters from the oil tank to meet the safety distance requirements for emergency operation by personnel.

[0038] The remote control unit of this invention is used to control the movement of the piston rod of the hydraulic cylinder 05, thereby driving the release pin 04 to move coaxially through the movement of the piston rod, so as to achieve the purpose of fixing the sliding bracket 01 to the fixed bracket 02 through the release pin 04, and in an emergency, the release pin 04 leaves the sliding bracket 01, so that the sliding bracket 01 and the oil tank fall into the sea.

[0039] Among them, such as Figure 4 As shown, the remote control unit includes a hydraulic pump 08 and a two-position four-way directional valve 07. The hydraulic pump 08 is connected to the pressure oil inlet of the two-position four-way directional valve 07, the return oil port of the two-position four-way directional valve 07 is connected to the oil tank 09, one working port of the two-position four-way directional valve 07 is connected to one working chamber of the actuator cylinder 05, and the other working port of the two-position four-way directional valve 07 is connected to the other working chamber of the actuator cylinder 05.

[0040] Specifically, the remote control unit in this embodiment of the invention includes a hydraulic pump 08 and a two-position four-way directional valve 07. When the two-position four-way directional valve 07 is in... Figure 4 In the indicated state, when hydraulic pump 08 pumps hydraulic oil from oil tank 09 into the pressure oil inlet (P port) of two-position four-way directional valve 07, this portion of hydraulic oil flows out from the working port (B port) of two-position four-way directional valve 07 and acts on... Figure 4The actuator moves the right chamber of hydraulic cylinder 05, thereby pushing the piston rod of hydraulic cylinder 05 to move to the left, that is, to extend it outward; after controlling the reversing of the two-position four-way directional valve 07, when the hydraulic pump 08 pumps the hydraulic oil in the oil tank 09 into the pressure oil inlet (P port) of the two-position four-way directional valve 07, this part of the hydraulic oil flows out through the other working port (A port) of the two-position four-way directional valve 07 and acts on... Figure 4 The left cavity of the actuator cylinder 05 is activated, thereby driving the piston rod of the actuator cylinder 05 to move to the right, that is, to retract inward; thus, the embodiment of the present invention realizes the movement of the release pin 04 through the movement of the piston rod, thereby making the release pin 04 in the state where the second diameter segment 041 is located in the mating hole 031, or the first diameter segment 042 is located in the mating hole 031.

[0041] Regarding the selection of the actuator cylinder 05 in this embodiment of the invention: Based on the experimental data of the pull-out force of the release pin 04, the minimum pull-out force for the release pin 04 to move is approximately 1000 kg. Selection is made through precise calculation using hydraulic formulas: The working pressure is set to P2 = 70 bar (approximately 7 MPa), and the hydraulic circuit efficiency is β = 0.8. According to the formula F = A2 × P2 × β, the effective area of ​​the rod chamber of the actuator cylinder 05 is derived as A2 = 1000 kg ÷ (70 bar × 0.8) = 17.86 cm². The inner diameter of the actuator cylinder 05 is set to D, and the piston rod diameter is set to d = 2 cm. Combining the formula for the effective area of ​​the rod chamber, A2 = π × (D / 2)² - π × (d / 2)², the inner diameter of the actuator cylinder 05 is calculated to be D = 5 cm. Based on the stroke requirement for the release pin 04 to be fully pulled out, the piston rod stroke is set to H = 150 mm to ensure that the release pin 04 can move to the corresponding position to meet the rapid response requirements for emergency release.

[0042] For the actuator cylinder 05, hydraulic pump 08, and two-position four-way directional valve 07: for example, the corresponding structures are connected by high-pressure oil pipes. The high-pressure oil pipes are made of stainless steel braided reinforced hoses with a working pressure rating of ≥25MPa and an outer layer wrapped with a salt spray-resistant and corrosion-resistant sheath. The laying of the high-pressure oil pipes should avoid high-temperature and collision-prone areas of the platform. The connection between the high-pressure oil pipes and actuator cylinder 05 and hydraulic pump 08 uses double compression fittings, and the sealing pressure at the connection is ≥70bar to ensure sealing reliability in the marine environment.

[0043] The hydraulic pump 08 in this embodiment is a manual pump, enabling it to operate independently and avoiding release failures due to reliance on external systems, thus meeting seaworthiness standards and the safety requirements for emergency release on offshore platforms. The oil tank 09 in this embodiment has a volume ≥0.5L. Correspondingly, a pressure relief valve with an opening pressure of 10MPa-15MPa can be installed on the high-pressure oil pipe between the actuator cylinder 05 and the two-position four-way directional valve 07 as needed. A manual pressure lever with an effective stroke of 150mm-200mm can also be installed, allowing the hydraulic circuit pressure to be stably maintained at 70bar through reciprocating pressure, providing continuous and reliable power for pin removal. The release unit in this embodiment achieves purely manual mechanical drive without relying on external power or the platform's hydraulic system.

[0044] Regarding the two-position four-way directional valve 07 in this embodiment of the invention: it is used to control the flow direction of hydraulic oil to realize the extension and retraction of the piston rod. In specific implementation, for example, a manually directional two-position four-way directional valve 07 is used. In order to prevent accidental contact that causes the two-position four-way directional valve 07 to switch, a snap-on anti-accidental contact cover is provided on the outside of the two-position four-way directional valve 07, for example. The unlocking force of the snap-on anti-accidental contact cover is 5N-10N. An operating panel can also be installed. The operating panel is fixedly installed on the upwind side of the drilling platform, away from the oil tank, with a horizontal straight-line distance of ≥15 meters from the oil tank to meet the safety distance requirements for emergency operation. In this case, the switching operation knob of the two-position four-way reversing valve 07 can be integrated into the operating panel. The corresponding snap-on anti-accidental touch cover is set to cover the switching operation knob of the two-position four-way reversing valve 07 on the operating panel to effectively prevent the switching of the two-position four-way reversing valve 07 due to accidental operation. A mechanical pointer-type status indicator window can also be set on the operating panel to display the "locked" and "released" status of the release pin 04 in real time, so that the operator can confirm the operating status of the device.

[0045] The oil tank emergency release device of this invention solves the problems of traditional devices requiring close-range operation, relying on external power, and insufficient reliability through the innovative design of pure mechanical drive, remote operation, sliding support 01 and fixed support 02, and meets the safety requirements of seaworthiness standards and emergency release on offshore platforms.

[0046] The assembly process of the oil tank emergency release device according to this embodiment of the invention is as follows: A fixed bracket 02, a sliding bracket 01, and a bracket seat 06 fixedly connected to the actuator cylinder 05 are fabricated according to the design dimensions. The fixed bracket 02 is welded and fixed to the designated position on the platform deck, ensuring the installation plane is horizontal. A slide rail is installed on the inclined surface 022 of the fixed bracket 02. The sliding bracket 01 is set up, and the smoothness of sliding between the slider and the slide rail is tested. The actuator cylinder 05 is fixed, and the piston rod of the actuator cylinder 05 is coaxially connected to the release pin 04. The corresponding bolts are tightened, and anti-loosening washers are added. A high-pressure oil pipe is laid, and a hydraulic pump 08 and a two-position four-way directional valve 07 are connected to form a closed hydraulic circuit. The pipeline is pressure tested, with a test pressure ≥100 bar to ensure no leakage. The operation panel is fixed in the safe area on the upwind side of the platform, and the two-position four-way directional valve 07 and the status indicator window are adjusted to ensure that the operation and indication are synchronized and accurate.

[0047] The operating procedure for the emergency release device for oil tanks according to this invention is as follows: When an emergency is triggered, the operator goes to the upwind control panel, unlocks the anti-accidental contact cover, and observes the status indicator window to confirm that the device is in the "locked" state; turns the reversing operation knob of the two-position four-way reversing valve 07 to the "release" position, manually pressurizes the independent manual pump to raise the hydraulic circuit pressure to 70 bar, drives the piston rod of the actuator cylinder 05 to extend, and pulls the release pin 04 with a pulling force of not less than 1000 kg; after the sliding bracket 01 is unlocked, the oil tank slides quickly off the platform along the inclined guide rail under the action of gravity and is thrown into the sea to complete the emergency release. The entire release response time is ≤2 seconds; after the emergency ends, the piston rod resets under the action of gravity after the oil tank is removed, the reversing operation knob of the two-position four-way reversing valve is turned in the opposite direction to the "reset" position, the pressure relief valve is manually operated to release the circuit pressure, the release pin 04 is reinserted into the hook, the status indicator window displays "locked", and the device returns to the standby state.

[0048] The emergency release device for oil tanks according to embodiments of the present invention has the following advantages: Safety is significantly improved: The remote operation design allows operators to complete the operation from more than 15 meters upwind, completely eliminating the risk of close contact with the oil tank and fundamentally avoiding injury to personnel from oil tank explosions and fires, fully meeting the safety protection requirements of airworthiness standards; the design of the anti-accidental contact shield further reduces the risk of misoperation in non-emergency situations.

[0049] High reliability: The pure mechanical drive mode does not rely on external power supply or hydraulic system. It is powered by an independent manual pump and can still be reliably triggered even in extreme conditions such as platform power failure or system failure, meeting the independent working requirements of the emergency release device; key components are made of salt spray resistant and wear resistant materials, and have passed the 720-hour salt spray aging test without failure, making them suitable for harsh marine environments.

[0050] Highly efficient and smooth release: The actuator cylinder 05, precisely selected based on experimental data of 1 ton pin pulling force, can provide sufficient pin pulling power, and the 150mm stroke ensures that the release pin 04 is completely disengaged; the wear-resistant coating of the inclined guide rail and the reasonable tilt angle design avoid jamming when the oil tank slides down, and the release response time is ≤2 seconds, meeting the rapid response requirements of emergency release.

[0051] Stable and durable structure: The combined support structure of fixed support 02 and sliding support 01 takes into account both load-bearing stability and release flexibility. The reinforced design of fixed support 02 and the anti-slip structure of sliding support 01 ensure that the oil tank is firmly fixed in the wind and waves under normal working conditions. All connection parts adopt anti-loosening and sealing design, which extends the service life of the equipment at sea and reduces maintenance costs.

[0052] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0053] Furthermore, the terms "a," "two," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An emergency release device for an oil tank, characterized in that, The system includes a fixed support, a sliding support, and a release pin. The oil tank to be released is placed on the sliding support. The fixed support is fixed to the drilling platform deck. The sliding support is mounted on the fixed support. The release pin is connected to a release unit. The release unit is used to move the release pin so that the release pin fixes the sliding support to the fixed support or detaches the sliding support from the release pin. After detaching from the release pin, the sliding support can fall into the sea, so that the oil tank falls into the sea.

2. The emergency release device for oil tanks according to claim 1, characterized in that, The fixed bracket includes an upper plane and an inclined plane connected to one side of the upper plane. After the sliding bracket is fixed to the fixed bracket by the release pin, a part of the sliding bracket is located on the upper plane and another part is located above the inclined plane. After the sliding bracket is released from the release pin, the sliding bracket slides down the inclined plane into the sea under the action of gravity.

3. The emergency release device for oil tanks according to claim 2, characterized in that, A slide rail is fixedly installed on the inclined surface, and a slider that cooperates with the slide rail is fixed on the sliding bracket. After the sliding bracket is fixed on the fixed bracket by the release pin, the slider is located above the inclined surface. After the sliding bracket is released from the release pin, the slider falls into the slide rail. A wear-resistant layer is provided on the slide rail, and the angle between the inclined surface and the horizontal plane is 15°-30°.

4. The emergency release device for oil tanks according to claim 2, characterized in that, Two fixing ears are fixedly connected to the other side of the upper plane. Each of the two fixing ears is provided with a pin hole that mates with the release pin. The release pin is located in the pin hole. A fixing plate is fixedly connected to the sliding bracket. The fixing plate is provided with a mating hole that mates with the release pin.

5. The emergency release device for oil tanks according to claim 4, characterized in that, The fixed plate has an opening communicating with the mating hole. The width of the opening is smaller than the diameter of the mating hole. The release pin includes a first diameter segment and a second diameter segment connected to the first diameter segment. The second diameter segment mates with the opening, and the first diameter segment mates with the mating hole. When the release pin moves to the point where the second diameter segment is located within the mating hole, the sliding bracket rotates under gravity until the fixed plate disengages from the release pin through the opening. A limit block is fixedly connected to the end of the release pin away from the release unit.

6. The emergency release device for oil tanks according to claim 5, characterized in that, The fixed bracket is made of Q345B material and is fixed to the drilling platform deck by welding. The surface of the fixed bracket is provided with an anti-corrosion layer. The sliding bracket is provided with an arc-shaped bearing surface adapted to the oil tank, and an anti-slip rubber pad is provided on the arc-shaped bearing surface.

7. The emergency release device for oil tanks according to claim 1, characterized in that, The release unit includes an actuator cylinder fixed on the fixed bracket. The piston rod of the actuator cylinder is connected to one end of the release pin. The actuator cylinder is connected to a remote control unit, which controls the movement of the piston rod of the actuator cylinder so as to drive the movement of the release pin through the movement of the piston rod of the actuator cylinder.

8. The emergency release device for oil tanks according to claim 7, characterized in that, The remote control unit includes a hydraulic pump and a two-position four-way directional valve. The hydraulic pump is connected to the pressure oil inlet of the two-position four-way directional valve, the return port of the two-position four-way directional valve is connected to an oil tank, one working port of the two-position four-way directional valve is connected to one working chamber of the actuator cylinder, and the other working port of the two-position four-way directional valve is connected to the other working chamber of the actuator cylinder.

9. The emergency release device for oil tanks according to claim 8, characterized in that, The distance between the two-position four-way directional valve and the oil tank is set to be more than 15 meters, and the two-position four-way directional valve is located on the upwind side of the oil tank. The two-position four-way directional valve is equipped with an anti-accidental contact protective cover, and the hydraulic pump is a manual pump.

10. The emergency release device for oil tanks according to claim 7, characterized in that, The piston rod of the actuator cylinder is coaxially fixed to the release pin via a detachable flange joint, and the actuator cylinder is fixed to the fixed bracket via a bracket seat.

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