An underwater air film drag reduction projectile, earth boring anchor and dam breach repair device

Abstract

The application relates to an underwater air film drag-reducing projectile, a ground drilling anchor and a dam breaking and repairing device. The underwater air film drag-reducing projectile comprises a projectile shell and a switch, the projectile shell is internally provided with a gas supply chamber, the projectile shell is provided with an air film forming hole enabling the gas supply chamber to communicate with the outside, the gas supply chamber is internally provided with a gas supply assembly capable of generating a jet gas flow, and the switch is connected with the gas supply assembly to control the gas supply assembly to spray gas outward through the air film forming hole after entering water to form an air film outside the projectile shell. The jet gas flow can form an air film adhering to the surface of the projectile shell during movement, greatly reducing the resistance generated by the direct contact between water and the projectile shell, reserving a large amount of kinetic energy for subsequent penetration into the soil, and solving the problem that in the prior art, kinetic energy is excessively consumed in water, and the final ground drilling depth is insufficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water conservancy engineering anchor, especially to an underwater air film drag reduction warhead, a drill anchor and a dam break repair device. BACKGROUND

[0002] Dam break occurs from time to time, which causes serious threat to the safety of people's life and property; and in the process of rescue, the dam break is usually plugged by using "steel-wood frame structure and composite protection technology", but it can only be used after the water potential is reduced; especially when the dam break of the main stream of a large river with large drop and high flow rate occurs, it is difficult for the stone blocks and stone nets directly thrown to the dam break to quickly take root and spread, which not only has poor plugging effect but also wastes valuable rescue time.

[0003] The Chinese patent application with the publication number CN107587507A discloses a rocket drill anchor, which has an anchor cable arranged at the tail of the anchor body; in use, the rescue personnel first connect the anchor cable with the fixed pile on the bank, and then launch the anchor body to the dam break position by using a launching vehicle; after the drill anchor is anchored into the mud of the riverbed, the steel net and stone cage are hung on the anchor cable and slid along the anchor cable to the dam break position; since the drill anchor generates stable anchoring force when anchored into the mud of the riverbed, the thrown objects on the anchor cable will not be easily washed away by the water flow, thereby solving the problem that the thrown objects are difficult to take root at the dam break.

[0004] However, the rocket drill anchor needs to sequentially experience three stages of air flight, water travel and anchoring into the mud after being launched; since the resistance in water is much greater than the air resistance, the travel speed of the rocket drill anchor is greatly reduced after entering the water, a large amount of kinetic energy is lost, and finally the drilling depth of the anchor body is insufficient. SUMMARY

[0005] The present application aims to provide an underwater air film drag reduction warhead to solve the problem that the drill anchor in the prior art has too large resistance when traveling in water, too much kinetic energy is lost, and finally the drilling depth is insufficient; the present application aims to provide a drill anchor which adopts the above-mentioned underwater air film drag reduction warhead; and the present application aims to provide a dam break repair device which adopts the above-mentioned drill anchor.

[0006] In order to solve the above-mentioned problems, the underwater air film drag reduction warhead of the present application adopts the following technical scheme:

[0007] The underwater air film drag reduction warhead of the present application comprises a warhead shell and a switch, the inside of the warhead shell is provided with a gas supply chamber, the warhead shell is provided with a gas film generating hole which can make the gas supply chamber communicate with the outside, the inside of the gas supply chamber is provided with a gas supply assembly which can generate a jet gas flow, and the switch is connected with the gas supply assembly to control the gas supply assembly to spray gas outward through the gas film generating hole after entering the water to form a gas film outside the warhead shell.

[0008] Further, the gas film generating hole is arranged at the front of the bullet shell.

[0009] Further, the gas film generating hole is arranged at the front of the bullet shell.

[0010] Further, the gas supply assembly comprises a powder column and an ignition lead wire, the ignition lead wire is connected with the switch through the side wall of the gas supply chamber.

[0011] Further, the volume of the gas supply chamber is larger than the volume of the powder column to provide oxygen space for the full combustion of the powder column in the gas supply chamber.

[0012] Further, the caliber of the gas film generating hole can ensure the gas injection in the gas supply chamber while preventing the water from entering the gas supply chamber through the gas film generating hole when the bullet shell just contacts the water surface.

[0013] Further, the bullet shell is internally provided with a water inlet cavity, the switch comprises an execution assembly capable of triggering the gas supply assembly to work, a water immersion sensor capable of sensing the water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal, the execution assembly and the signal converter are arranged in the accommodating cavity arranged in the bullet shell, the signal converter is connected with the water immersion sensor and the execution assembly to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the execution assembly so as to make the gas supply assembly work, and the water immersion sensor is arranged in the water inlet cavity.

[0014] Further, a plurality of water inlet channels are circumferentially arranged on the cavity wall of the water inlet cavity.

[0015] Further, the bullet shell is internally provided with a water inlet cavity, the switch comprises an ignition device connected with the ignition lead wire, a water immersion sensor capable of sensing the water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal, the ignition device and the signal converter are arranged in the accommodating cavity arranged in the bullet shell, the signal converter is connected with the water immersion sensor and the ignition device to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the ignition device so as to ignite the powder column, and the water immersion sensor is arranged in the water inlet cavity.

[0016] Further, a plurality of water inlet channels are circumferentially arranged on the cavity wall of the water inlet cavity.

[0017] Further, the bullet shell is internally provided with a water inlet cavity, the switch comprises an ignition device connected with the ignition lead wire, a water immersion sensor capable of sensing the water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal, the ignition device and the signal converter are arranged in the accommodating cavity arranged in the bullet shell, the signal converter is connected with the water immersion sensor and the ignition device to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the ignition device so as to ignite the powder column, and the water immersion sensor is arranged in the water inlet cavity.

[0018] Beneficial effects: the underwater air film drag reduction warhead of the application is an improved invention. Due to the arrangement of the gas supply assembly, the warhead shell generates gas in the gas supply chamber through the switch after entering the water, the gas is sprayed from the air film generating hole to form an air film on the surface of the warhead shell, the solid-liquid friction between the original warhead shell and the water body is changed into the gas-liquid friction between the air film and the water body, the resistance generated by the direct impact of the water body on the warhead shell is greatly reduced, a large amount of kinetic energy is reserved for the subsequent penetration into the soil, and the problem of excessive kinetic energy loss in the water in the prior art and insufficient final drilling depth is solved.

[0019] In order to solve the above problems, the drilling anchor of the application adopts the following technical scheme:

[0020] The drilling anchor of the application comprises a bullet body and an underwater air film drag reduction warhead arranged at the front end of the bullet body, the underwater air film drag reduction warhead comprises a warhead shell and a switch, the inside of the warhead shell is provided with a gas supply chamber, the warhead shell is provided with an air film generating hole which can communicate the gas supply chamber with the outside, the inside of the gas supply chamber is provided with a gas supply assembly which can generate a jet gas flow, and the switch is connected with the gas supply assembly to control the gas supply assembly to spray gas outward through the air film generating hole to form an air film outside the warhead shell after entering the water.

[0021] Further, the air film generating hole is arranged at the front part of the warhead shell.

[0022] Further, the air film generating hole is arranged at the front part of the warhead shell.

[0023] Further, the gas supply assembly comprises a powder column and an ignition lead wire, and the ignition lead wire passes through the side wall of the gas supply chamber and is connected with the switch.

[0024] Further, the volume of the gas supply chamber is greater than the volume of the powder column to provide oxygen space for the full combustion of the powder column in the gas supply chamber.

[0025] Further, the caliber of the air film generating hole can ensure the gas spraying in the gas supply chamber and prevent the water from entering the gas supply chamber through the air film generating hole when the warhead shell just contacts the water surface.

[0026] Further, the inside of the warhead shell is further provided with a water inlet cavity, the switch comprises an execution assembly which can trigger the gas supply assembly to work, a water immersion sensor which can sense the water and generate a water signal, and a signal converter which can convert the water signal into an electric signal, the execution assembly and the signal converter are arranged in the accommodating cavity arranged in the warhead shell, the signal converter is connected with the water immersion sensor and the execution assembly to convert the water signal of the water immersion sensor into an electric signal and send it to the execution assembly so as to make the gas supply assembly work, and the water immersion sensor is arranged in the water inlet cavity.

[0027] Further, a plurality of water inlet channels are circumferentially arranged on the cavity wall of the water inlet cavity.

[0028] Further, the water inlet cavity is further provided in the bullet shell, and the switch comprises an ignition device connected with the ignition wire, a water immersion sensor capable of sensing water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal; the ignition device and the signal converter are arranged in the accommodating cavity of the bullet shell; the signal converter is connected with the water immersion sensor and the ignition device to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the ignition device to ignite the propellant column; and the water immersion sensor is arranged in the water inlet cavity.

[0029] Further, a plurality of water inlet holes are circumferentially arranged on the cavity wall of the water inlet cavity.

[0030] Further, the conical head of the bullet shell is in a circular arc shape.

[0031] Beneficial effects: The earth anchor is an improved invention. Due to the arrangement of the gas supply assembly, the bullet shell generates gas in the gas supply chamber through the switch after entering the water, the gas is sprayed from the gas film generating hole to form a gas film on the surface of the bullet shell, the solid-liquid friction between the original bullet shell and the water is changed into gas-liquid friction between the gas film and the water, and the resistance generated by the direct impact of the water on the bullet shell is greatly reduced, a large amount of kinetic energy is reserved for the subsequent penetration into the soil, and the problem of excessive kinetic energy loss in the water in the prior art and insufficient final drilling depth is solved.

[0032] In order to solve the above problems, the dam repair device adopts the following technical scheme:

[0033] The dam repair device comprises a launching vehicle provided with a cluster launching device and an earth anchor, the earth anchor comprises a bullet body and an underwater gas film drag reduction bullet head arranged at the front end of the bullet body, the underwater gas film drag reduction bullet head comprises a bullet shell and a switch, the bullet shell is internally provided with a gas supply chamber, the bullet shell is provided with a gas film generating hole for connecting the gas supply chamber with the outside, the gas supply chamber is internally provided with a gas supply assembly capable of generating a jet gas flow, and the switch is connected with the gas supply assembly to control the gas supply assembly to spray gas outward through the gas film generating hole after entering the water to form a gas film outside the bullet shell.

[0034] Further, the gas film generating hole is arranged at the front part of the bullet shell.

[0035] Further, the gas film generating hole is arranged at the front part of the bullet shell.

[0036] Further, the gas supply assembly comprises a propellant column and an ignition wire, and the ignition wire is connected with the switch through the side wall of the gas supply chamber.

[0037] Further, the volume of the gas supply chamber is greater than the volume of the propellant column to provide an oxygen space for the propellant column to fully burn in the gas supply chamber.

[0038] Further, the caliber of the gas film generating hole can prevent water from entering the gas supply chamber through the gas film generating hole while ensuring the gas in the gas supply chamber to be sprayed out.

[0039] Further, the bullet shell is internally provided with a water inlet cavity, the switch comprises an execution assembly capable of triggering the gas supply assembly to work, a water immersion sensor capable of sensing water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal, the execution assembly and the signal converter are arranged in a containing cavity arranged in the bullet shell, the signal converter is connected with the water immersion sensor and the execution assembly to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the execution assembly so as to make the gas supply assembly work, and the water immersion sensor is arranged in the water inlet cavity.

[0040] Further, a plurality of water inlet channels are circumferentially arranged on the cavity wall of the water inlet cavity.

[0041] Further, the bullet shell is internally provided with a water inlet cavity, the switch comprises an execution assembly capable of triggering the gas supply assembly to work, a water immersion sensor capable of sensing water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal, the execution assembly and the signal converter are arranged in a containing cavity arranged in the bullet shell, the signal converter is connected with the water immersion sensor and the execution assembly to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the execution assembly so as to make the gas supply assembly work, and the water immersion sensor is arranged in the water inlet cavity.

[0042] Further, a plurality of water inlet channels are circumferentially arranged on the cavity wall of the water inlet cavity.

[0043] Further, the bullet shell is internally provided with a water inlet cavity, the switch comprises an execution assembly capable of triggering the gas supply assembly to work, a water immersion sensor capable of sensing water and generating a water signal, and a signal converter capable of converting the water signal into an electric signal, the execution assembly and the signal converter are arranged in a containing cavity arranged in the bullet shell, the signal converter is connected with the water immersion sensor and the execution assembly to convert the water signal of the water immersion sensor into an electric signal and send the electric signal to the execution assembly so as to make the gas supply assembly work, and the water immersion sensor is arranged in the water inlet cavity.

[0044] Beneficial effects: The breach repair device is an open-type invention. Due to the arrangement of the gas supply assembly, the bullet shell generates gas in the gas supply chamber through the switch after entering the water, the gas is sprayed out from the gas film generating hole to form a gas film on the surface of the bullet shell, the solid-liquid friction between the original bullet shell and the water is changed into gas-liquid friction between the gas film and the water, the resistance generated by the direct impact of the water on the bullet shell is greatly reduced, a large amount of kinetic energy is reserved for the penetration into the soil, and the problem that the kinetic energy is excessively consumed in the water and the final drilling depth is insufficient in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 The structure diagram of an embodiment of the drilling anchor;

[0046] Figure 2 The working diagram of the drilling anchor.

[0047] In the diagram: 1. Film gas generation hole; 2. Projectile casing; 3. Propellant charge; 4. Ignition wire; 5. Ignition device; 6. Sealing protective shell; 7. Signal converter; 8. Signal transmission line; 9. Water immersion sensor; 10. Water inlet channel; 11. Gas supply assembly; 12. Weight-adding section; 13. Boost section; 14. Boost fuel; 15. Gas outlet; 16. Gas nozzle; 17. Underwater mud; 18. Projectile; 19. Launching projectile; 20. Breach; 21. Embankment; 22. Launch vehicle; 23. Cluster launch device. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] First, the inventive concept of this invention is to generate an air film on the outer surface of the projectile casing 2 after it enters the water, thereby transforming the original solid-liquid friction between the projectile casing 2 and the water into gas-liquid friction between the air film and the water. This greatly reduces the resistance generated by the direct impact between the water and the projectile casing 2, and preserves a large amount of kinetic energy for subsequent penetration into the soil, thus solving the problem of insufficient penetration depth.

[0050] Based on the above design concept, the first aspect of the present invention provides an underwater film drag reduction warhead, such as... Figure 1 The device includes a warhead casing 2 and a switch. The warhead casing 2 has an air supply chamber inside and an air film generating hole 1 on the warhead casing 2 that allows the air supply chamber to communicate with the outside. The air supply chamber has an air supply component 11 that can generate jet airflow. The jet airflow is then ejected outward through the air film generating hole 1 to form an air film that can adhere to the surface of the warhead casing 2. The switch controls the working time of the air supply component 11 to prevent it from generating drag when it is ejected in the air.

[0051] In one embodiment, the gas film generating hole 1 can be opened in the middle or rear section of the projectile shell 2, which can also achieve the above-mentioned effect. However, in order to further improve the drag reduction effect, in a more preferred embodiment, the gas film generating hole 1 is opened in the front of the projectile shell 2, so that the gas film can cover more area and improve the drag reduction effect.

[0052] Therefore, in one embodiment, the air film generating holes 1 can be evenly opened in the circumferential direction of the warhead shell 2 at the front part, to achieve the above technical purposes; but since the part of the warhead shell 2 that is most impacted by the water flow during the running is the top tip position, in another more preferred embodiment, the air film generating holes 1 are located at the front tip of the warhead shell 2, to maximize the drag reduction ability of the air film and improve the drag reduction effect.

[0053] In one embodiment, a gas cylinder containing compressed nitrogen and a jet nozzle can be used to provide the gas, and the jet nozzle can spray the gas outward through the air film generating holes 1 under the control of the switch, so as to achieve the effect of generating a jet flow.

[0054] Further, in one embodiment, the switch can be a remote sensing signal receiver for receiving instructions from the staff on the shore, and the staff can manually control the jet nozzle through remote control after launching to control the jet time of the jet nozzle; this design is more flexible, but the switch structure is more complex and the design cost is higher, and the signal reception can be poor when the launching distance is too far; therefore, in a preferred embodiment, a water inlet cavity is also provided in the warhead shell 2, and the switch includes an execution assembly that can trigger the jet nozzle to work, a water immersion sensor 9 that can sense the water body and generate a water signal, and a signal converter 7 that can convert the water signal into an electrical signal, the execution assembly is arranged in the accommodating cavity provided in the warhead shell, and the signal converter 7 is connected with the water immersion sensor 9 and the execution assembly through a signal transmission line 8 to convert the water signal of the water immersion sensor 9 into an electrical signal and send it to the execution assembly, so as to make the jet nozzle work, and the water immersion sensor 9 is arranged in the water inlet cavity to avoid the water body from interfering with the work of other electrical elements.

[0055] In the above embodiment based on compressed nitrogen as the gas source, although the gas cylinder containing compressed nitrogen can achieve the above technical effects, the cost of compressed nitrogen is high, and the required switch is also complex, which increases the overall manufacturing cost and does not meet the design needs of batch production; therefore, in order to reduce the manufacturing cost, in a preferred embodiment, the gas supply assembly 11 includes a powder column 3 and an ignition lead 4, the powder column 3 is cheap and easy to mass-produce, and the powder column 3 generates gas quickly, which is suitable for high-speed flying warheads; and the ignition lead 4 is connected with the switch through the side wall of the gas supply chamber, so as to facilitate the ignition of the switch; since the powder column 3 is relatively easy to trigger, the corresponding switch is also relatively easy to design, so as to meet the needs of reducing cost and simplifying structure.

[0056] Further, the above-mentioned design can significantly optimize the jet effect, but if the space of the gas supply chamber is not enough and the amount of gunpowder of the gunpowder column 3 is too large, an explosion may occur in the narrow space. Therefore, in a preferred embodiment, the volume of the gas supply chamber is greater than the volume of the gunpowder column 3 to provide space for the gunpowder column 3 to burn fully and the gas generated by the burning can be released in the gas supply chamber in advance to reduce part of the pressure and avoid the gunpowder column 3 from igniting and exploding in the closed space.

[0057] However, although the tip position set at the top fully utilizes the drag reduction ability and the enlarged gas supply chamber is beneficial to the burning of the gunpowder column 3, the water body may also be pressed into at the moment when the bullet shell 2 enters the water and wet the gunpowder column 3. In order to ensure the dryness of the gunpowder column 3 as much as possible, in a preferred embodiment, the caliber of the gas film generating hole 1 can prevent the water from entering the inside of the gas supply chamber through the gas film generating hole 1 when the bullet shell 2 just contacts the water surface while ensuring the gas in the gas supply chamber to be sprayed out. Since there is a certain amount of gas in the gas supply chamber itself, when the water body is pressed in for a distance, it will be limited by its own pressure and cannot be pressed in further, so that more water cannot enter the inside of the gas supply chamber, thereby ensuring the stable operation while protecting the internal components and improving the stability of the operation.

[0058] Further, in an embodiment, the switch can be a remote sensing signal receiver for receiving the instructions of the shore staff. The staff can manually control the ignition of the gunpowder column 3 and control the ignition time of the gunpowder column 3 after launching. This design is more flexible, but the structure of the switch is more complex and the design cost is higher, and the signal reception may be poor when the launching distance is too far. Therefore, in a preferred embodiment, the bullet shell 2 further comprises a water inlet cavity, a water immersion sensor 9 capable of sensing water and generating a water signal, a signal converter 7 capable of converting the water signal into an electrical signal, and an ignition device 5 connected with the switch and the ignition wire. The ignition device 5 and the signal converter 7 are arranged in the accommodating cavity in the bullet shell. The signal converter 7 is connected with the water immersion sensor 9 and the ignition device 5 through the signal transmission line 8 to convert the water signal of the water immersion sensor 9 into an electrical signal and send it to the ignition device 5 to ignite the gunpowder column 3. The gunpowder column 3 will then generate a large amount of gas in the gas supply chamber, and the water immersion sensor 9 is arranged in the water inlet cavity to avoid the water from interfering with the work of other electrical components.

[0059] Based on the above design basis, in order to avoid the problem that the water immersion sensor 9 cannot perceive the water body in the first time, thereby affecting the jet time, in a preferred embodiment, a plurality of water inlet channels 10 are arranged on the cavity wall of the water inlet cavity in the circumferential direction, the water inlet channels 10 are communicated with the water inlet cavity, so that the external water body can contact the water immersion sensor 9 in the water inlet cavity through the water inlet channels 10, thereby making the water immersion sensor 9 generate a water signal, the arrangement of the plurality of water inlet channels 10 makes the bullet shell 2 can perceive the water body in the first time through the water inlet channels 10 regardless of the angle of entering the water, thereby generating a water signal, and ensuring the stable operation of the work.

[0060] In order to further reduce the resistance when running in water, and facilitate the formation of gas film by the ejected gas, in an embodiment, as shown in Figure 1 The conical head of the bullet shell 2 is arc-shaped; the arc-shaped bullet shell 2 effectively reduces the resistance when running, and at the same time, because there is no corner, it is more conducive to the formation of a relatively uniform cover of the gas film at the end of the bullet shell 2.

[0061] Specifically, as shown in Figure 2 The rescue personnel drive the launch vehicle 22 provided with the cluster launching device 23 to the specified position of the embankment 21, adjust the launching posture, and continuously launch a plurality of earth anchors with underwater gas film drag reduction bullet heads at the breach 20; after the earth anchor ends the flight in the air and enters the water, the river water enters the inside of the bullet body through the water inlet channels 10 and is perceived by the water immersion sensor 9; the water immersion sensor 9 transmits the water signal to the signal converter 7 through the signal transmission line 8, the signal converter 7 converts the water signal into an electric signal and further transmits it to the ignition device 5; the ignition device 5 ignites the propellant column 3 through the ignition lead 4 after receiving the signal, so that a large amount of gas is generated by burning in the gas supply chamber; a large amount of gas is ejected through the gas film generating hole 1 under the limitation of the volume of the gas chamber, and a gas film is formed outside the bullet shell 2, thereby reducing the resistance encountered by the earth anchor when running in water, and deeply penetrating into the underwater soil 17 to facilitate the later rescue personnel to throw the throwing object 18.

[0062] In the second aspect of the present application, a kind of earth anchor is provided, as shown in Figure 1As shown, including the elastic body and the underwater air film drag reduction warhead arranged in the front end of the elastic body, wherein the underwater air film drag reduction warhead is any one of the underwater air film drag reduction warheads in the above design concept, further, the weight increasing section 12 can be arranged behind the underwater air film drag reduction warhead to increase the weight of the earth anchor and increase the soil depth, the earth anchor made of the underwater air film drag reduction warhead can greatly reduce the resistance of the earth anchor in water, and firmly anchor into the bottom soil 17; the tail of the earth anchor can only be provided with the boost section 13 provided with boost fuel 14, the boost fuel 14 is directly sprayed out from the gas jet pipe 16 through the gas opening 15, and the anchor cable is not arranged at the tail of the earth anchor, the earth anchor after launching directly uses the body as the blocking anchoring device of the river bottom, and the problem that the anchor cable affects the flight stability after the earth anchor is launched is avoided.

[0063] In a third aspect, the application provides a dam breaking repair device, as shown, Figures 1 to 2 As shown, including the launch vehicle provided with the cluster launching device and the earth anchor, wherein the earth anchor is the earth anchor in the second aspect of the application, the dam breaking repair device adopting the earth anchor in the second aspect of the application can quickly form a blocking array under water at the breach 20, and facilitate the throwing of the subsequent throwing object 18, and strive for the rescue time.

[0064] The above is only the preferred embodiment of the application, and is not used to limit the application, the patent protection scope of the application is subject to the claims, and any equivalent structural changes made by referring to the content of the specification and drawings of the application should also be included in the protection scope of the application.

Claims

1. An underwater air-foil drag-reducing projectile, characterized by, The device includes a warhead casing and a switch. The warhead casing contains an air supply chamber and an air film generation hole that allows the air supply chamber to communicate with the outside. An air supply assembly that generates jet airflow is located inside the air supply chamber. The switch is connected to the air supply assembly to control the air supply assembly to expel air outward through the air film generation hole after entering water, thereby forming an air film outside the warhead casing. The warhead casing also contains a water inlet chamber. The switch includes an actuator that triggers the air supply assembly, a water immersion sensor that senses water and generates a water signal, and a signal converter that converts the water signal into an electrical signal. The actuator and the signal converter are located inside a cavity within the warhead casing. The signal converter is connected to the water immersion sensor and the actuator to convert the water signal from the water immersion sensor into an electrical signal and send it to the actuator, thereby activating the air supply assembly. The water immersion sensor is located in the water inlet chamber.

2. The underwater airfoil drag-reducing projectile of claim 1, wherein, The air film generating hole is located at the front of the warhead casing.

3. The underwater airfoil drag-reducing projectile of claim 2, wherein, The film-forming hole is located at the front tip of the warhead casing.

4. The underwater airfoil drag-reducing projectile of claim 1, wherein, The gas supply assembly includes a gunpowder column and an ignition wire, the ignition wire passing through the side wall of the gas supply chamber and connected to the switch.

5. The underwater airfoil drag-reducing projectile of claim 4, wherein, The volume of the gas supply chamber is larger than the volume of the gunpowder column to provide oxygen space for the complete combustion of the gunpowder column in the gas supply chamber.

6. The underwater airfoil drag-reducing projectile of claim 4, wherein, The diameter of the gas film generating hole is such that it ensures that gas is ejected from the gas supply chamber while preventing water from entering the gas supply chamber through the gas film generating hole when the warhead casing just touches the water surface.

7. The underwater airfoil drag-reducing projectile of claim 1, wherein, Multiple water inlet channels are formed circumferentially on the wall of the water inlet chamber.

8. The underwater airfoil drag-reducing projectile of claim 4, wherein, The execution component is an ignition device connected to the ignition wire, which ignites the gunpowder column.

9. The underwater airfoil drag-reducing projectile of claim 1, wherein, The cone-shaped part of the warhead casing is arc-shaped.

10. An earth boring anchor, characterized by, It includes a projectile body and an underwater film drag-reducing warhead disposed at the front end of the projectile body, wherein the underwater film drag-reducing warhead is the underwater film drag-reducing warhead as described in any one of claims 1-9.

11. A device for repairing a breach, characterized in that It includes a launch vehicle equipped with a cluster launch device and a drilling anchor, wherein the drilling anchor is the drilling anchor as described in claim 10.

Images