Quick oil drain device in emergency

Abstract

The application belongs to the technical field of structure design, and particularly relates to a rapid oil discharging device in an emergency state. The device comprises a shell, a cover, a nut and an explosive bolt. The shell comprises a bottom plate and two coaxial ring plates arranged on the bottom plate, a closed ring cavity is formed between the two ring plates, the bottom plate is fixed at the bottom of an oil tank, the ring plates extend into an oil discharging port of the oil tank, and the inner ring plate is enclosed to form an oil discharging through hole. The nut is fixed in the closed ring cavity. The cover comprises a cover plate and a blocking body in the middle, the cover plate is connected with the bottom plate through the explosive bolt and the nut, and the blocking body extends into the oil discharging through hole to block the oil tank. When an emergency oil discharging signal is sent, the explosive bolt is exploded and cut off, the cover is separated from the shell under the action of the pressure of the oil tank, and fuel is rapidly discharged along the oil discharging through hole. The application can rapidly open the oil tank opening through the explosive bolt in an emergency state to rapidly discharge the fuel out of the machine, the response speed is fast, and fuel discharging can be realized without relying on other devices.

Description

Technical Field

[0001] This application belongs to the field of structural design technology, and specifically relates to a rapid oil discharge device in an emergency. Background Technology

[0002] During flight, various equipment failures may occur, requiring an emergency landing. Therefore, it is necessary to quickly drain the fuel to reduce the aircraft weight to the landing weight for a forced landing or to avoid serious secondary damage during a crash. Currently, fuel pumps inside the fuel tank are commonly used to extract fuel from the outside of the aircraft. The fuel draining speed depends entirely on the power of the fuel pump. However, in some extremely urgent situations, the fuel draining window is short, and the fuel pump is difficult to meet the fuel draining requirements. Therefore, new fuel draining methods are needed to drain the fuel inside the aircraft in a short time. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a rapid oil release device for emergency situations, which mainly includes a housing, a cover, a nut, and an explosion bolt;

[0004] The outer shell includes a base plate and two coaxial annular surrounding plates disposed on the base plate, forming a closed annular cavity between the two annular surrounding plates. The base plate is fixed to the bottom of the oil tank, and the annular surrounding plates extend into the oil drain port at the bottom of the oil tank. The inner annular surrounding plates form an oil drain through hole for draining oil.

[0005] The nut is fixed inside the sealed annular cavity;

[0006] The cover includes a cover plate and a sealing body disposed in the middle of the cover plate. The cover plate is connected to the bottom plate of the outer shell by an explosion bolt and the nut. The sealing body extends into the oil drain hole to seal the oil tank.

[0007] Upon receiving an emergency fuel release signal, the explosive bolt explodes and shears off, causing the cover plate of the port to lose connection with the bottom plate of the outer casing. Under the pressure of the fuel tank, the port detaches from the outer casing, and the fuel is discharged through the drain hole.

[0008] Preferably, the annular surrounding plate of the outer shell extends into the oil drain hole with an annular crimping ring, and the sealing body is provided with an annular groove facing the inside of the oil tank to accommodate the crimping ring, and the sealing strip is installed in the annular groove.

[0009] Preferably, the bottom plate of the outer casing is connected to the tank wall at the bottom of the tank by bolts.

[0010] Preferably, there are multiple nuts, and the multiple nuts are evenly distributed along the circumferential direction of the sealed annular cavity of the housing, and are integrally manufactured with the housing.

[0011] Preferably, the sealing strip is made of elastic rubber or polymer material.

[0012] Preferably, the explosive bolt is an electrically activated explosive bolt.

[0013] This application allows for the rapid opening of the fuel tank via explosive bolts in emergency situations, enabling fuel to be quickly discharged from the engine. It offers a fast response time and eliminates the need for other devices to discharge fuel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a preferred embodiment of the rapid oil discharge device in an emergency situation according to this application.

[0015] Figure 2 This application Figure 1 A schematic diagram of the outer shell structure of the embodiment shown.

[0016] Figure 3 This application Figure 1 Axial view of the cap structure of the embodiment shown.

[0017] Figure 4 This application Figure 1 A schematic diagram showing the connection between the device and the fuel tank in the illustrated embodiment.

[0018] Among them, 1-outer shell, 11-bottom plate, 12-annular surrounding plate, 13-crimping ring, 2-mouth cover, 21-cover plate, 22-sealing body, 23-annular groove, 3-sealing strip, 4-nut, 5-explosion bolt, 6-bolt, 7-oil tank. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of this application, not all of them. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0020] This application provides a rapid oil draining device in an emergency, such as... Figures 1-3 As shown, it mainly includes an outer shell 1, a cover 2, a nut 4, and an explosion bolt 5;

[0021] The outer casing 1 includes a base plate 11 and two coaxial annular surrounding plates 12 disposed on the base plate. A closed annular cavity 12 is formed between the two annular surrounding plates 12. The base plate 11 is fixed to the bottom of the oil tank, and the annular surrounding plates 12 extend into the oil drain port at the bottom of the oil tank. The inner annular surrounding plates form an oil drain through hole for draining oil.

[0022] The nut 4 is fixed inside the sealed annular cavity;

[0023] The cover 2 includes a cover plate 21 and a sealing body 22 disposed in the middle of the cover plate 21. The cover plate 21 is connected to the bottom plate 11 of the outer shell 1 by an explosion bolt 5 and the nut 4. The sealing body 22 extends into the oil drain hole to seal the oil tank.

[0024] Upon receiving an emergency fuel release signal, the explosive bolt 5 explodes and shears off, causing the cover plate 21 of the port cover 2 to lose connection with the bottom plate 11 of the outer casing 1. Under the pressure of the fuel tank, the port cover 2 detaches from the outer casing 1, and the fuel is discharged along the fuel drain hole.

[0025] In this embodiment, reference Figure 4 The bottom of the fuel tank 7 has a pre-reserved oil drain port. The outer shell 1 is installed at the oil drain port and the outer shell 1 defines the actual oil drain hole. The oil drain hole is further sealed by the cap 2. The cap 2 is connected to the outer shell 1 by an explosion bolt so that the cap 2 can be released quickly to open the oil drain hole for oil drainage.

[0026] This embodiment utilizes a coaxial double-ring enclosure design to create an independent, sealed annular cavity on the outer shell 1. This cavity provides installation space for the nut 4 and provides physical protection for the connection between the nut 4 and the explosive bolt 5, preventing corrosion or loosening caused by prolonged fuel immersion. The design of the sealing body 22 extending into the drain hole allows the cap 2 to directly and physically seal the drain channel under normal conditions, resulting in a simple structure and a short sealing path. In emergency fuel release, the cap 2 detaches instantly under the pressure inside the fuel tank after the explosive bolt 5 is sheared, requiring no additional power unit and exhibiting extremely fast response, meeting the requirements for rapid weight reduction during emergency aircraft landings.

[0027] In some alternative embodiments, the annular surrounding plate 12 of the outer casing 1 extends into the oil drain hole with an annular crimping ring 13, and the sealing body 22 is provided with an annular groove 23 that accommodates the crimping ring 13 facing the inside of the oil tank, and the sealing strip 3 is installed in the annular groove 23.

[0028] This embodiment employs a compression sealing method where the crimping ring 13 and the annular groove 23 work together. The sealing strip 3 is deformed by the combined compression of the crimping ring 13 and the groove wall of the annular groove 23, forming a reliable sealing interface. This sealing structure can withstand the internal pressure of the fuel tank and flight vibrations under normal flight conditions, maintaining long-term sealing performance. In emergency fuel release, because the sealing strip 3 is installed in the annular groove 23 of the cap 2, it can provide a reverse force to the cap 2, helping the cap 2 to detach from the outer shell 1.

[0029] In some alternative embodiments, the bottom plate 11 of the outer casing 1 is connected to the tank wall at the bottom of the tank by bolts 6.

[0030] In this embodiment, the base plate 11 of the outer casing 1 is fixed to the oil tank wall by bolts, which facilitates the installation, disassembly, and routine maintenance of the device. As an alternative, the base plate 11 can also be fixed to the oil tank wall by welding, which is suitable for scenarios with higher requirements for sealing and structural strength; or a flange with a sealing ring can be used for connection, taking into account both connection strength and disassembly.

[0031] In some alternative embodiments, there are multiple nuts 4, and the multiple nuts 4 are evenly distributed along the circumferential direction of the sealed annular cavity of the housing 1, and are integrally manufactured with the housing 1.

[0032] In this embodiment, multiple nuts 4 are evenly distributed along the circumferential direction of the sealed annular cavity and integrally manufactured with the outer shell 1. This ensures that the tightening force of the expansion bolts 5 is evenly applied to the cover plate 21, avoiding localized stress concentration that could lead to connection failure. This integrated manufacturing can be achieved through precision casting or CNC machining, improving production efficiency and eliminating the risk of loosening or detachment that might result from additional nut assembly 4. Alternatively, the nuts 4 can also be fixed within the sealed annular cavity by welding or interference fit, achieving a similarly stable and reliable connection.

[0033] In some alternative embodiments, the sealing strip 3 is made of elastic rubber or polymer material.

[0034] In this embodiment, the sealing strip 3 is made of elastic rubber or polymer material. These materials have good compression resilience and resistance to fuel corrosion, and can maintain a stable sealing effect in a wide temperature range and vibration environment during aircraft flight. The cross-sectional shape of the sealing strip 3 matches the annular groove 23, for example, using an O-type or rectangular cross-section to ensure optimal compression ratio and sealing reliability. A suitable sealing material is a key factor in ensuring reliable sealing under normal conditions and not hindering the smooth removal of the cover 2 in emergency situations.

[0035] In some alternative embodiments, the explosive bolt 5 is an electrically activated explosive bolt.

[0036] This embodiment uses an electrically triggered explosive bolt 5, which can directly receive electrical signals from the aircraft's emergency fuel dumping system for instantaneous triggering. It offers fast response and good compatibility with the aircraft's electronic control system, facilitating automated control. As an alternative, the explosive bolt 5 can also be mechanically or hydraulically triggered, as long as it can quickly shear off the cap 2 upon receiving an emergency signal. Due to its compact structure and high reliability, the electrically triggered explosive bolt 5 is particularly suitable for aircraft emergency fuel dumping scenarios where response time is extremely critical.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An emergency rapid oil draining device, characterized in that, Includes outer shell (1), cap (2), nut (4) and explosion bolt (5); The outer shell (1) includes a base plate (11) and two coaxial annular surrounding plates (12) disposed on the base plate. A closed annular cavity (12) is formed between the two annular surrounding plates (12). The base plate (11) is fixed to the bottom of the oil tank, and the annular surrounding plates (12) extend into the oil drain port at the bottom of the oil tank. The annular surrounding plates inside form an oil drain through hole for draining oil. The nut (4) is fixed inside the sealed annular cavity; The cover (2) includes a cover plate (21) and a sealing body (22) disposed in the middle of the cover plate (21). The cover plate (21) is connected to the bottom plate (11) of the outer shell (1) by an explosion bolt (5) and the nut (4). The sealing body (22) extends into the oil drain hole to seal the oil tank. When an emergency oil discharge signal is received, the explosive bolt (5) explodes and shears off, causing the cover plate (21) of the cap (2) to lose connection with the bottom plate (11) of the outer shell (1). The cap (2) is released from the outer shell (1) under the pressure of the oil tank, and the fuel is discharged along the drain hole.

2. The rapid oil draining device in an emergency situation according to claim 1, characterized in that, The annular surrounding plate (12) of the outer shell (1) extends into the oil drain hole with an annular crimping ring (13). The sealing body (22) is provided with an annular groove (23) facing the inside of the oil tank to accommodate the crimping ring (13). The sealing strip (3) is installed in the annular groove (23).

3. The rapid oil draining device in an emergency situation according to claim 1, characterized in that, The bottom plate (11) of the outer casing (1) is connected to the tank wall at the bottom of the tank by bolts.

4. The rapid oil draining device in an emergency situation according to claim 1, characterized in that, There are multiple nuts (4), and the multiple nuts (4) are evenly distributed along the circumferential direction of the closed annular cavity of the outer shell (1), and are integrally manufactured with the outer shell (1).

5. The rapid oil draining device in an emergency situation according to claim 1, characterized in that, The sealing strip (3) is made of elastic rubber or polymer material.

6. The rapid oil draining device in an emergency situation according to claim 1, characterized in that, The explosive bolt (5) is an electrically activated explosive bolt.

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