Outlet water recoverable throwing cover

Abstract

The invention relates to an effluent recoverable throwing cover which comprises a base, a head cover, a protective cover, an annular energy-gathered cutting rope, an exploder, an effluent sensor and a floating body structure. The base, the head cover and the protective cover are all of shell structures and are coaxially mounted; the front hood section is of a conical structure, the rear hood section is of a cylindrical structure, the large-diameter end of the front hood section is connected with the rear hood section, and the rear hood section is fixed to the peripheral face of the front base section in a sleeving mode; the protective cover is sleeved in the head cover, the outer peripheral surface of the protective cover front section is bonded with the inner peripheral surface of the head cover front section, the protective cover rear section is fixedly connected with the head cover rear section, and the protective cover rear end surface is not in contact with the front end surface of the base; the water outlet sensor is arranged at the rear section of the head cover; the floating body structure is filled and fixed at the front section of the hood; the annular energy-gathered cutting rope is fixed to the tail end of the head cover front section and used for cutting off connection between the head cover front section and the head cover rear section, and the head cover front section and the floating body structure are separated to fall into water and float in water as a whole. The structure is simple, and the front section of the hood floats in water together with the floating body structure after being separated, so that recycling is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft separation, and in particular relates to a water-discharging recyclable jettison cover. Background Art

[0002] The aircraft is generally equipped with an optical window on the head. In order to meet the requirements of optical imaging, the outer contour of the optical window is generally a partial spherical structure or a combination of a partial spherical and a conical column structure. When the aircraft needs to navigate in the water and emerge from the water before starting to fly in the air according to the use requirements, the above shapes are usually not suitable for the aircraft's underwater navigation and emergence. In addition, during the underwater navigation and emergence from the water, the optical window comes into contact with water and foreign objects in the water, which will wear, contaminate or even damage the optical window. It is necessary to install a protective cover on the outside of the optical window, and according to the needs of the aircraft, the protective cover can be thrown away from the aircraft at a predetermined height, speed or time after emerging from the water.

[0003] There are two main solutions for the existing separation hood technology: First, a complex structure is used to move the position of the protective cover. The moving mechanism usually contains a power source (such as a drive motor, a high-pressure gas cylinder, an actuator, etc.), an unlocking mechanism, a transmission mechanism, a position sensing device, a stop mechanism, etc., but such a mechanism is large in size, complex in structure, heavy in weight, has many actuation steps, and slow in response speed. It may even require the aircraft to provide additional power or gas source for the protective cover, occupying the precious space, mass and electrical resources of the aircraft. Second, a protective cover with its own separation engine is used. The protective cover as a whole can be unlocked and separated from the aircraft under the action of maneuvering force, but such a protective cover requires a separation engine to be installed inside. The separation engine is generally composed of an engine casing, propellant, nozzle, ignition device and safety protection device. It has a complex structure and a large size, occupying the limited space and mass of the aircraft. Moreover, the separation engine is separated from the aircraft together with the protective cover. After the propellant is consumed, the remaining part of the separation engine is the dead weight of the mechanism, which increases the mass of the protective cover. In addition, a flame exhaust window needs to be set, and it is also necessary to ensure that the separation engine does not damage or burn other important parts of the aircraft after flame exhaust. Summary of the invention

[0004] In view of this, the present invention provides a water-discharging recyclable hood with a simple structure and small size, which reduces the limited space and mass occupied by the aircraft; there is no need to set a flame exhaust window, completely avoiding the disadvantages brought by the flame exhaust window; after the front section of the hood is separated, it floats in the water with the floating structure, which is convenient for recovery.

[0005] The present invention is realized through the following technical scheme: a water-discharging recyclable throwable cover, including a base, a hood, a protective cover, an annular energy-gathering cutting rope, a detonator, a water-discharging sensor and a floating structure; the base and the protective cover are both shell structures with open ends, and the hood is a shell structure with a closed front end and an open rear end; the base, the hood and the protective cover are all divided into a front section and a rear section and are coaxially installed; the front section of the hood is a conical structure, and the rear section of the hood is a cylindrical structure, the large-diameter end of the front section of the hood is connected to the rear section of the hood, and the rear section of the hood is sheathed and fixed on the outer peripheral surface of the front section of the base; the protective cover is sheathed in the hood, and the outer peripheral surface of the front section of the protective cover is bonded to the inner peripheral surface of the front section of the hood The rear section of the shield is fixedly connected to the rear section of the hood, and the rear end surface of the shield does not contact the front end surface of the base; the water outlet sensor is arranged at the rear section of the hood, for sensing whether the hood flies out of the water; the floating structure is filled and fixed inside the front section of the hood; the annular energy-focusing cutting rope is circumferentially fixed to the inner circumference of the end of the front section of the hood, and the detonator is fixed to the front section of the shield corresponding to the annular energy-focusing cutting rope and is used to detonate the annular energy-focusing cutting rope; the annular energy-focusing cutting rope is used to cut off the connection between the front section of the hood and the rear section of the hood, and to separate the front section of the hood and the floating structure from the rear section of the hood. After the front section of the hood is separated from the floating structure and falls into the water, it floats in the water as a whole.

[0006] Furthermore, an annular opening groove is provided on the inner peripheral surface of the end of the front section of the hood, and the annular energy-focusing cutting rope is fixed in the annular opening groove. The jet direction of the annular energy-focusing cutting rope is perpendicular to the bottom surface of the annular opening groove and faces outward; a through hole is provided on the front section of the shield, and the detonator is fixed in the through hole.

[0007] Furthermore, the bottom surface of the annular opening groove is a conical surface, and its conical half angle is the same as the conical half angle of the outer peripheral surface of the front section of the head cover.

[0008] Furthermore, the inner diameter of the rear section of the hood is larger than the outer diameter of the rear section of the shield, and the rear section of the hood is gap-matched with the rear section of the shield; a number of through countersunk holes Ⅰ are arranged circumferentially on the rear section of the hood, and a number of through threaded holes Ⅰ that match the countersunk holes Ⅰ are provided on the rear section of the shield; a number of screws Ⅰ pass through the countersunk holes Ⅰ and are threadedly matched with the threaded holes Ⅰ to be fixed.

[0009] Furthermore, the inner diameter of the rear section of the head cover is larger than the outer diameter of the front section of the base, and the rear section of the head cover and the front section of the base are clearance-matched; a number of through countersunk holes II are arranged circumferentially on the rear section of the head cover, and a number of through threaded holes II that match the countersunk holes II are provided on the front section of the base; a number of screws II pass through the countersunk holes II and are threadedly matched with the threaded holes II to be fixedly connected.

[0010] Furthermore, the float structure is composed of a float I and a float II with different densities; the float I and the float II are both a combination structure of half a cone and half a cylinder equally divided along the axis, the float I and the float II are bonded and fixedly connected to form a combination structure of a cone and a cylinder, and the cone half-angle of the cone is the same as the cone half-angle of the inner circumference of the front section of the hood.

[0011] Furthermore, float I is low-density polyurethane foam, and float II is high-density polyurethane foam. Float I emerges from the water first, and float II emerges from the water later. The total buoyancy of the float structure is greater than the sum of the gravity of the front separation part of the hood and the float structure.

[0012] Furthermore, the base, the shield, the screw I and the screw II are all made of metal materials, and the head cover 2 is made of metal material or non-metal material.

[0013] Furthermore, the base, the shield, the screw I and the screw II are all made of steel, and the head cover is made of one of steel, aluminum alloy or composite material.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention does not require additional unlocking mechanisms, transmission mechanisms, stop mechanisms, etc. After the water outlet sensor senses that the hood is out of water, the metal jet of the annular energy-focusing cutting rope is used to remove the connection between the front section of the hood and the rear section of the hood, so that the front section of the hood and the rear section of the hood are unlocked. After the explosion of the metal jet, the gas expansion work and the kinetic energy transfer of the metal jet are caused to achieve the separation of the front section of the hood and the rear section of the hood. After separation, the floating structure flies out together with the front section of the hood, falls into the water as a whole and floats to the surface for easy recovery, which is convenient, fast and low-cost.

[0016] 2. An annular opening groove is provided at the end of the front section of the hood of the present invention, and the bottom surface of the annular opening groove is set to a conical surface with a cone half angle consistent with the front section of the hood. The metal jet is perpendicular to the bottom surface of the annular opening groove, that is, perpendicular to the front section of the hood and faces outward to exert maximum efficiency.

[0017] 3. The annular opening groove of the present invention weakens the connection strength between the front section and the rear section of the hood, and strengthens the connection strength between the rear section of the hood and the protective cover and the base through evenly distributed screws; the separation problem of the hood and the base is decomposed into two parts: the separation of the front section and the rear section of the hood and the fixation of the rear section of the hood to the base; the hood is divided into two sections, and the separation body (the front section of the hood and the floating structure) separated along the flight direction of the aircraft is smaller in size and lighter in weight, the separation speed of the separation body is faster, and the separation body can more reliably leave the aircraft route.

[0018] 4. The present invention divides the floating body structure into a floating body I and a floating body II with different densities. When the float is thrown out of the water, the low-density floating body comes out of the water first and the high-density floating body comes out of the water later. The low-density floating body I is above the high-density floating body II, that is, after the separation, the overall center of mass of the separation body is below the axis, which is conducive to the separation body to quickly deviate from the flight path of the aircraft.

[0019] 5. The base, shield, screw I and screw II of the present invention are all made of steel, and the head cover is made of one of steel, aluminum alloy or composite materials, which not only meets the requirement of overall light weight but also provides strong protection for the optical window. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the water-discharging recyclable hood.

[0021] Among them, 1-base, 2-head cover, 3-protective cover, 4-annular energy-forming cutting rope, 5-detonator, 6-screw I, 7-screw II, 8-floating body I, 9-floating body II, 10-water outlet sensor, 201-inner circumference of the front section of the head cover, 202-inner circumference of the rear section of the head cover, 203-rear end face of the head cover, 204-bottom surface of the annular opening groove, 301-outer circumference of the front section of the protective cover, 302-outer circumference of the rear section of the protective cover, 303-rear end face of the protective cover, 304-front end face of the protective cover, 305-inner circumference of the front section of the protective cover, 306-inner circumference of the rear section of the protective cover. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The present invention provides a water-discharging recyclable throw cover, such as Figure 1 As shown, the water-recoverable disposable cover includes a base 1, a head cover 2, a protective cover 3, an annular energy-focusing cutting rope 4, a detonator 5, a water-outlet sensor 10 and a floating structure; the base 1 and the protective cover 3 are both shell structures open at both ends, and the head cover 2 is a shell structure with a closed front end and an open rear end; the base 1, the head cover 2, and the protective cover 3 are all divided into a front section and a rear section and are coaxially installed.

[0024] The base 1 is divided into a front section and a rear section from front to back, and both the front section and the rear section of the base are cylindrical structures. The inner diameter of the front section of the base is the same as the inner diameter of the rear section of the base, and the outer diameter of the front section of the base is smaller than the outer diameter of the rear section of the base, that is, the rear section of the base has a front end face facing the front section of the base, and the front end face is perpendicular to the axis of the base; the rear section of the base is used to be fixedly connected to the aircraft, and the front section of the base is used to be fixedly connected to the hood.

[0025] The hood 2 is divided into a front section and a rear section from front to back. The front section of the hood is a conical structure used to protect the optical window of the aircraft. The rear section of the hood is a cylindrical structure. The large diameter end of the front section of the hood is connected to the rear section of the hood. The maximum circular outer diameter of the front section of the hood is the same as the outer diameter of the rear section of the hood, that is, the outer peripheral surface of the front section of the hood and the inner peripheral surface 201 of the front section of the hood are both conical surfaces, and the large diameter ends of both are connected to the rear section of the hood; in this embodiment, the cone half angle of the inner peripheral surface 201 of the front section of the hood is greater than the cone half angle of the outer peripheral surface of the front section of the hood. The rear section of the hood is coaxially mounted and fixed on the outer peripheral surface of the front section of the base (the inner peripheral surface 202 of the rear section of the hood is opposite to the outer peripheral surface of the front section of the base); in this embodiment, the rear end surface 203 of the hood is perpendicular to the axis of the hood, and the rear end surface 203 of the hood abuts against the front end surface of the rear section of the base.

[0026] The shield 3 is divided into a front section and a rear section from front to back. The shield 3 is integrally coaxially mounted and fixed in the hood 2. The shield front section is used to connect with the hood front section, and the shield rear section is a cylindrical structure used to connect with the hood rear section. In this embodiment, the outer circumferential surface 301 of the shield front section and the inner circumferential surface 305 of the shield front section can both be conical surfaces, and their cone half angles are the same as the cone half angles of the inner circumferential surface 201 of the hood front section. The large diameter end of the shield front section is connected to the shield rear section, and the maximum outer diameter of the shield front section is consistent with the outer diameter of the shield rear section; the front end surface 304 of the shield can also be a conical surface, and its generatrix is ​​perpendicular to the generatrix of the outer circumferential surface 301 of the shield front section. The length of the front section of the shield is smaller than that of the front section of the hood, the outer circumferential surface 301 of the front section of the shield is close to the inner circumferential surface 201 of the front section of the hood, and the contact area between the two is bonded by sealant; the length of the rear section of the shield is smaller than that of the rear section of the hood, the rear section of the shield is fixedly connected to the rear section of the hood, the rear end surface 303 of the shield is perpendicular to the axis, and the rear end surface 303 of the shield does not contact the front end surface of the base, that is, the shield 3 is in front and the base 1 is in the back, and the shield 3 and the base 1 have a certain distance; the water outlet sensor 10 is arranged on the rear section of the hood, and the water outlet sensor is used to sense whether the hood flies out of the water.

[0027] In this embodiment, the front part of the rear section of the hood is fixedly connected to the rear section of the shield by fasteners evenly arranged circumferentially, and the rear part of the rear section of the hood is fixedly connected to the front section of the base by fasteners evenly arranged circumferentially. The water outlet sensor 10 is located between the shield 3 and the base 1, and there is a distance between the water outlet sensor 10 and the front end surface of the base; there are two water outlet sensors 10, which are evenly arranged circumferentially in the rear section of the hood; the rear section of the hood is provided with a threaded hole, the water outlet sensor 10 is a stepped cylindrical structure, the cylindrical structure of the front section of the water outlet sensor 10 is provided with an external thread, the front section of the water outlet sensor 10 is threadedly connected to the rear section of the hood, the diameter of the rear section of the water outlet sensor 10 is larger than the diameter of the front section, and the top of the rear section of the water outlet sensor 10 abuts against the inner circumferential surface 202 of the rear section of the hood.

[0028] The floating structure is filled and fixed inside the front section of the hood; the detonator 5 is fixed on the front section of the protective hood for detonating the annular energy-focusing cutting rope 4; the annular energy-focusing cutting rope 4 is circumferentially fixed on the inner circumferential surface of the end of the front section of the hood, the metal jet of the annular energy-focusing cutting rope 4 cuts off the connection between the front section of the hood and the rear section of the hood, the gas expansion work caused by the jet detonation and the kinetic energy transfer of the metal jet realize the separation of the front section of the hood and the rear section of the hood, the front section of the protective hood is separated from the front section of the hood, the front section of the hood, the floating structure and the rear section of the hood are separated and fall into the water, and the front section of the hood and the floating structure float in the water as a whole; the protective hood 3, the rear section of the hood and the front section of the base are always fixed together.

[0029] The inner circumference of the end of the front section of the hood can also be provided with an annular opening groove, the opening of the annular opening groove is inward; the front section of the shield is provided with a through hole; the annular energy-gathering cutting rope 4 is fixed in the annular opening groove, and the detonator 5 is fixed in the through hole. After the detonator 5 detonates the annular energy-gathering cutting rope 4, the jet direction of the annular energy-gathering cutting rope 4 is perpendicular to the bottom surface 204 of the annular opening groove and is outward. The through hole can be a stepped hole, the stepped hole is a threaded hole near the outer circumference 301 of the front section of the shield, and is a light hole near the inner circumference 305 of the front section of the shield, and the diameter of the light hole is larger than the diameter of the threaded hole; the detonator 5 can be a stepped cylindrical structure accordingly, the cylinder of the front section of the detonator is provided with an external thread that is fixedly connected with the threaded hole of the stepped hole, and the diameter of the cylinder of the rear section of the detonator is larger than the diameter of the cylinder of the front section of the detonator. In a specific implementation, two stepped holes can be evenly arranged along the axial direction of the front section of the shield according to actual conditions, for placing two detonators 5.

[0030] As an improvement, in order to maximize the effect of the annular energy-gathering cutting rope 4 and separate the front section of the hood from the rear section of the hood as quickly as possible, the bottom surface 204 of the annular opening groove is a conical surface, and its conical half angle is the same as the conical half angle of the outer peripheral surface of the front section of the hood, and its conical half angle is an acute angle; the two side surfaces of the annular opening groove can also be conical surfaces, and the generatrix of the two side surfaces is perpendicular to the generatrix of the bottom surface 204 of the annular opening groove, and the two side surfaces are coaxial with the bottom surface. After the detonator 5 detonates the annular energy-gathering cutting rope, the metal jet of the annular energy-gathering cutting rope 4 cuts off the annular opening groove, and the detonation causes the gas to expand and do work and the metal jet kinetic energy to be transferred, thereby realizing the separation of the front section of the hood from the rear section of the hood, and the front section of the hood and the floating structure inside it fly out as a whole.

[0031] As an improvement, the inner diameter of the rear section of the hood is larger than the outer diameter of the rear section of the shield, and the rear section of the hood and the shield have a clearance fit; the rear section of the hood is provided with N1 through-going countersunk holes Ⅰ in the circumference, and the shield rear section is provided with N1 through-going threaded holes Ⅰ that match the countersunk holes Ⅰ (threaded holes Ⅰ pass through the inner circumference 306 of the rear section of the shield and the outer circumference 302 of the rear section of the shield); N1 screws Ⅰ6 pass through the countersunk holes Ⅰ and are threadedly connected with the threaded holes Ⅰ. The inner diameter of the rear section of the hood is larger than the outer diameter of the front section of the base, and the rear section of the hood and the shield have a clearance fit; the rear section of the hood is provided with N2 through-going countersunk holes Ⅱ in the circumference, and the front section of the base is provided with N2 through-going threaded holes Ⅱ that match the countersunk holes Ⅱ; N2 screws Ⅱ7 pass through the countersunk holes Ⅱ and are threadedly connected with the threaded holes Ⅱ. Corresponding to the positional relationship of the shield 3 in front and the base 1 in the back, the countersunk holes Ⅰ are in the front part of the rear section of the hood, and the countersunk holes Ⅱ are in the back part of the rear section of the hood.

[0032] As an improvement, the floating structure is composed of a floating body I8 and a floating body II9 of different densities; both the floating body I8 and the floating body II9 are a combination structure of half a cone and half a cylinder equally divided along the axis, and the floating body I8 and the floating body II9 are bonded and fixed to form a combination structure of a cone and a cylinder, and the cone half angle of the cone is the same as the cone half angle of the inner circumference 201 of the front section of the head cover. The floating structure is coaxial with the head cover, and the connecting surface of the floating body I8 and the floating body II9 is ​​fixed together by an adhesive, and the semicircular surface (bottom surface) of the floating body I8 and the floating body II9 are coated with sealant. The cylindrical side of the floating structure does not contact the detonator 5 and has a certain distance. In this embodiment, float I8 is low-density polyurethane foam, and float II9 is ​​high-density polyurethane foam. When the hood is thrown out of water, float I8 comes out of water first, and float II9 comes out of water later, that is, float I8 is above float II9, and the total buoyancy of the float structure is greater than the sum of the gravity of the separated part of the front section of the hood and the float structure.

[0033] The base 1, the shield 3, the screws I6 and II7 can all be made of metal materials, and the head cover 2 can be made of metal materials or non-metal materials. In this embodiment, the base 1 is made of steel, the shield 3 is made of steel, the screws I6 and II7 are made of steel, and the head cover is made of steel, aluminum alloy or composite material.

[0034] The present invention integrates all the structural elements required for separation and unlocking on the hood 2 and the protective cover 3. The structure is simple and reliable, small in size, and does not occupy the limited space and mass of the aircraft. The hood 2 is divided into two sections. The front section of the hood separated along the flight direction of the aircraft is smaller in size and lighter in mass, and the separation speed is faster. The front section of the hood can more reliably detach from the aircraft route and finally float in the water for easy recovery.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-discharging recyclable cover, characterized in that: It includes a base, a hood, a protective cover, an annular energy-forming cutting rope, a detonator, a water outlet sensor and a floating structure; the base and the protective cover are shell structures with both ends open, and the hood is a shell structure with a closed front end and an open rear end; the base, the hood and the protective cover are divided into a front section and a rear section and are coaxially installed; The front section of the hood is a conical structure, and the rear section of the hood is a cylindrical structure. The large diameter end of the front section of the hood is connected to the rear section of the hood, and the rear section of the hood is mounted and fixed on the outer peripheral surface of the front section of the base; the shield is mounted inside the hood, the outer peripheral surface of the front section of the shield is bonded to the inner peripheral surface of the front section of the hood, and the rear section of the shield is fixed to the rear section of the hood, and the rear end surface of the shield does not contact the front end surface of the base; the water outlet sensor is arranged at the rear section of the hood to sense whether the hood flies out of the water; the floating structure is filled and fixed inside the front section of the hood; The annular energy-focusing cutting rope is circumferentially fixed on the inner circumferential surface of the end of the front section of the hood, and the detonator is fixed on the front section of the hood corresponding to the annular energy-focusing cutting rope and is used to detonate the annular energy-focusing cutting rope; the annular energy-focusing cutting rope is used to cut off the connection between the front section of the hood and the rear section of the hood, and to separate the front section of the hood and the floating structure from the rear section of the hood. After the front section of the hood is separated from the floating structure and falls into the water, it floats in the water as a whole.

2. The water-discharging recyclable cover according to claim 1, characterized in that: An annular opening groove is provided on the inner peripheral surface of the end of the front section of the hood, and the annular energy-focusing cutting rope is fixed in the annular opening groove. The jet direction of the annular energy-focusing cutting rope is perpendicular to the bottom surface of the annular opening groove and faces outward; a through hole is provided on the front section of the shield, and the detonator is fixed in the through hole.

3. The water-discharging recyclable cover as claimed in claim 2, characterized in that: The bottom surface of the annular opening groove is a conical surface, and its conical half angle is the same as the conical half angle of the outer peripheral surface of the front section of the head cover.

4. The water-discharging recyclable cover according to claim 1, characterized in that: The inner diameter of the rear section of the hood is larger than the outer diameter of the rear section of the shield, and the rear section of the hood is clearance-matched with the rear section of the shield; a plurality of through countersunk holes Ⅰ are arranged circumferentially on the rear section of the hood, and a plurality of through threaded holes Ⅰ are arranged on the rear section of the shield to match the countersunk holes Ⅰ; a plurality of screws Ⅰ pass through the countersunk holes Ⅰ and are threadedly matched with the threaded holes Ⅰ to be fixedly connected.

5. The water-discharging recyclable cover according to claim 1, characterized in that: The inner diameter of the rear section of the head cover is larger than the outer diameter of the front section of the base, and the rear section of the head cover and the front section of the base are clearance matched; a plurality of through countersunk holes II are arranged circumferentially on the rear section of the head cover, and a plurality of through threaded holes II matching with the countersunk holes II are arranged on the front section of the base; a plurality of screws II pass through the countersunk holes II and are fixedly connected with the threaded holes II by thread matching.

6. The water-discharging recyclable cover according to any one of claims 1 to 5, characterized in that: The floating body structure is composed of a floating body I and a floating body II with different densities; both floating body I and floating body II are a combination structure of half a cone and half a cylinder equally divided along the axis, and floating body I and floating body II are bonded and fixedly connected to form a combination structure of a cone and a cylinder, and the cone half angle of the cone is the same as the cone half angle of the inner circumference of the front section of the hood.

7. The water-discharging recyclable cover as claimed in claim 6, characterized in that: Float I is low-density polyurethane foam, and float II is high-density polyurethane foam. Float I emerges from the water first, and float II emerges from the water later. The total buoyancy of the float structure is greater than the sum of the gravity of the separated part of the front section of the hood and the float structure.

8. The water-discharging recyclable cover as claimed in claim 7, characterized in that: The base, the shield, the screw I and the screw II are all made of metal materials, and the head cover 2 is made of metal material or non-metal material.

9. The water-discharging recyclable cover according to claim 8, characterized in that: The base, the shield, the screw I and the screw II are all made of steel, and the head cover is made of one of steel, aluminum alloy or composite material.

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