CN116950751A - Air inlet and outlet device for amphibious boat power system - Google Patents

Abstract

The application relates to an air inlet and exhaust device for an amphibious boat power system, which comprises a pressure-resistant tank body arranged in a boat body, wherein an internal combustion engine system is arranged in the pressure-resistant tank body, a pump jet propeller is connected with the internal combustion engine system through universal coupling power, the air inlet system and the exhaust system are arranged in the pressure-resistant tank body and communicated with the outside of the boat body, the exhaust system comprises an exhaust pipe, one end of the exhaust pipe is connected to the internal combustion engine system in the pressure-resistant tank body, and the other end of the exhaust pipe is positioned at the inner wall of the boat body and provided with an opening which is vertically upwards and outwards; the exhaust pipe is provided with an exhaust valve in a rotating way towards the outward opening end, the inner side of the opening end of the exhaust pipe is provided with a water collecting bucket, the center of the water collecting bucket is provided with a water collecting door control mechanism, and when the water collecting amount in the water collecting door control mechanism exceeds the outward exhaust force received by the exhaust valve, the exhaust valve is closed, so that the exhaust pipe can be automatically and passively closed, the wave and water tightness problems of amphibious boats under different sailing states are effectively solved, and the normal sailing of the amphibious boats is greatly ensured.

Description

Air inlet and outlet device for amphibious boat power system

Technical Field

The application relates to the technical field of amphibious boats, in particular to an air inlet and outlet device for an amphibious boat power system.

Background

Amphibious boat featuring two states of water surface and underwater navigation can navigate at high speed on water surface or navigate at low speed under underwater navigation.

When the amphibious boat sails under the water surface state, the internal combustion engine system drives the water-jet propeller to serve as sailing power, and at the moment, the engine room is required to meet the use requirements of wave resistance (watertight), air intake, air exhaust and the like, namely good water surface wave resistance (watertight) measures are required to be taken for the air intake system and the air exhaust system, so that the internal combustion engine system in the engine room can be ensured to work normally; in the underwater diving state, the amphibious boat adopts a battery to drive an underwater propeller as navigation power, and corresponding watertight protection measures still need to be adopted in the turbine cabin to ensure the watertight of the turbine cabin.

Because the amphibious boat is used in two sailing states, the working environment states of the engine room are completely different, watertight measures are also completely different, and the wave (watertight) measures of the corresponding air inlet system and the exhaust system must ensure that the internal combustion engine system can work normally in the two states at the same time, so that the accident that seawater flows into the engine room through the air inlet system or the exhaust system is avoided.

Disclosure of Invention

The inventor provides the air inlet and outlet device for the amphibious boat power system with reasonable structure aiming at the defects in the prior art, thereby effectively solving the problems of wave resistance and water tightness of the amphibious boat engine room under different sailing states and greatly ensuring the normal sailing of the amphibious boat.

The technical scheme adopted by the application is as follows:

the air inlet and outlet device for the amphibious boat power system comprises a pressure-resistant tank body arranged in the boat body, wherein an internal combustion engine system is arranged in the pressure-resistant tank body, the internal combustion engine system is connected with a pump jet propeller through universal coupling power, and an air inlet system and an air outlet system are arranged in the pressure-resistant tank body and are communicated with the outside of the boat body;

the exhaust system has the structure that: the internal combustion engine system comprises an exhaust pipe, wherein one end of the exhaust pipe is connected to an internal combustion engine system in a pressure-resistant tank body, and the other end of the exhaust pipe is positioned at the inner wall of the boat body and provided with an opening which is vertically upwards and outwards; the exhaust valve is rotatably arranged at the outward opening end of the exhaust pipe, the water collecting bucket is arranged at the inner side of the opening end of the exhaust pipe, the water collecting door control mechanism is arranged at the center of the water collecting bucket, and when the water collecting amount in the water collecting door control mechanism exceeds the outward exhaust force received by the exhaust valve, the exhaust valve is closed.

As a further improvement of the above technical scheme:

the exhaust pipe is arranged in the boat body in an L-shaped structure, the end head of the horizontal part of the exhaust pipe is connected into the pressure-resistant tank body, an exhaust axial flow fan and an exhaust butterfly valve are sequentially arranged in the end head of the horizontal part of the exhaust pipe, the exhaust butterfly valve is used for controlling the on-off switching of the exhaust pipe, and the exhaust axial flow fan is used for exhausting the exhaust gas of the internal combustion engine system outwards through the exhaust pipe; a door frame which is assembled with the exhaust valve in a sealing way is arranged on the boat body at the end part of the exhaust pipe.

An exhaust drain pipe is arranged on the bottom surface of the horizontal part of the exhaust pipe in a communicated manner, and the water collecting gate control mechanism is communicated with the exhaust drain pipe through a pipeline; and an exhaust water drain valve is arranged on the exhaust water drain pipe in series.

The water collecting bucket is of a conical structure with a large upper part and a small lower part, an exhaust hole which is communicated up and down is formed in the water collecting bucket, a water collecting barrel is connected in a downward communicated mode at the center of the bottom surface of the water collecting bucket, a balance block is movably installed in the water collecting barrel up and down, a lower connecting rod is upwards extended at the center of the top surface of the balance block, an upper connecting rod is rotatably installed at the top end of the lower connecting rod, the top end of the upper connecting rod is rotatably installed with an exhaust valve, and the balance block moves up and down relative to the water collecting barrel to form a water collecting door control mechanism for controlling the switching of the opening and the closing of the exhaust valve.

A check ring is arranged on the inner wall surface of the water collection barrel above the balance weight, and the check ring limits the upward moving distance of the balance weight relative to the water collection barrel; the opening of the water collection cylinder is supported with a limiting ring through a supporting rod, and the lower connecting rod upwards penetrates through the limiting ring.

When the balance block is positioned at a low position relative to the water collecting cylinder, a water drain pipe I is arranged on the wall surface of the water collecting cylinder positioned at the top surface of the balance block in a communicated mode, and the water drain pipe I is communicated with an exhaust water drain pipe; and a water drain pipe II is arranged at the bottom end of the water collecting cylinder towards the exhaust water drain pipe in a communicated manner.

The exhaust holes are distributed on the conical surface of the water collection bucket at intervals along the circumferential direction, the single exhaust holes are distributed along the inclined direction of the conical surface, and the edges of the single exhaust holes extend towards the inside of the water collection bucket to form a flanging.

The structure of the air inlet system is as follows: the device comprises a fixed pipe which is in an L-shaped structure and is arranged in a boat body, wherein a lifting inner pipe is arranged in the vertical part of the fixed pipe, the lifting inner pipe is driven by a lifting mechanism to extend upwards and outwards or retract relative to the boat body, and outside air is communicated with the inside of the fixed pipe through the lifting inner pipe when the lifting inner pipe is in an extending state; the horizontal part of the fixed pipe is communicated with the pressure-resistant tank body; and a sealing component is assembled between the lifting inner pipe and the fixed pipe, and the lifting inner pipe and the fixed pipe are sealed by the sealing component in a state that the lifting inner pipe is retracted or extended relative to the fixed pipe.

An air inlet axial flow fan and an air inlet butterfly valve are sequentially arranged in the end head of the horizontal part of the fixed pipe, an air inlet drain pipe is arranged on the bottom surface of the horizontal part of the fixed pipe in a communicated mode, and an air inlet drain valve is arranged on the air inlet drain pipe in series.

An end plate is arranged at the top end of the lifting inner tube in a sealing manner, and an air inlet hole is formed in the upper part of the side wall surface of the lifting inner tube in a penetrating manner; the outer wall surface of the lifting inner pipe above the air inlet is sleeved with waterproof rubber I, and the lower part of the outer wall surface of the lifting inner pipe is sleeved with waterproof rubber II; an upper clamping ring is arranged on the inner wall surface of the fixed pipe between the first waterproof rubber and the second waterproof rubber, and the first waterproof rubber is attached to the top surface of the upper clamping ring or the second waterproof rubber is attached to the bottom surface of the upper clamping ring to form a sealing assembly.

The beneficial effects of the application are as follows:

the application has compact and reasonable structure, convenient and reliable use, the exhaust valve at the end part of the exhaust system is opened under the action of the exhaust force, the water entering the exhaust system is collected by the water collecting door control mechanism, and when the water collecting amount in the water collecting door control mechanism exceeds the outward exhaust force borne by the exhaust valve, the exhaust valve is closed; the water-tight structure between the exhaust valve and the boat body is combined, so that the relative balance relation between the exhaust force formed by the exhaust gas flow and the water gravity of the seawater in the inflow exhaust pipeline is effectively utilized, the autonomous and passive closing of the exhaust pipe is realized, the problems of wave resistance and water tightness of the amphibious boat engine room under different sailing states are effectively solved, and the normal sailing of the amphibious boat is greatly ensured;

the application also has the following advantages:

the sealing assembly between the lifting inner pipe and the fixed pipe in the air inlet system effectively ensures the watertight requirement between the lifting inner pipe and the fixed pipe in two different states of lifting or retracting of the lifting inner pipe, realizes bidirectional watertight and effectively solves the watertight problem of the air inlet system of the amphibious boat engine room.

Drawings

FIG. 1 is a schematic view of the layout of the air intake system and the exhaust system on a boat body.

Fig. 2 is a schematic structural view of the exhaust system of the present application (exhaust valve open state).

Fig. 3 is a schematic view of the structure of the exhaust system of the present application (exhaust valve closed state).

Fig. 4 is a schematic structural view of the water collection gate mechanism (exhaust valve open state) of the present application.

Fig. 5 is a schematic structural view of the water collection gate mechanism (exhaust valve closed state) of the present application.

Fig. 6 is a top view of the water collection bucket of the present application.

Fig. 7 is an enlarged view of fig. 6 taken along A-A.

Fig. 8 is a schematic view of the structure of the intake system of the present application (lift inner tube extended state).

Fig. 9 is a schematic view of the structure of the lifting mechanism of the present application (lifting inner tube retracted state).

Fig. 10 is a schematic view of the structure of the lifting mechanism of the present application (lifting inner tube extended state).

Fig. 11 is a left side view of fig. 10.

Fig. 12 is a schematic view of the structure of the seal assembly of the present application (inner tube retracted state in elevation).

Fig. 13 is a partial enlarged view at B in fig. 12.

Fig. 14 is a schematic view of the seal assembly of the present application (inner tube extended lift state).

Fig. 15 is a partial enlarged view at C in fig. 14.

Wherein: 1. a pump jet propeller; 2. an electric propeller; 3. a universal coupling; 4. an internal combustion engine system; 5. a pressure-resistant tank; 6. a hull; 10. an air intake system; 20. an exhaust system;

11. lifting the inner tube; 12. a lifting mechanism; 13. a fixed tube; 14. an air inlet butterfly valve; 15. an air inlet axial flow fan; 16. an air inlet and drain pipe; 17. an air inlet and water outlet valve; 18. a seal assembly;

111. an air inlet hole;

121. a support; 122. a mounting base; 123. a linear power mechanism; 124. a guide stay tube; 125. a guide inner tube; 126. a first locking nut; 127. a second locking nut;

181. an end plate; 182. waterproof rubber I; 183. a clamping ring is arranged; 184. waterproof rubber II; 185. a lower snap ring;

21. an exhaust valve; 22. a door frame; 23. a water collection gate control mechanism; 24. an exhaust axial flow fan; 25. an exhaust butterfly valve; 26. an exhaust pipe; 27. an exhaust drain valve; 28. an exhaust drain pipe;

231. a water collection bucket; 232. a retainer ring; 233. a balance weight; 234. a water collecting cylinder; 235. a drain pipe I; 236. a second drain pipe; 237. an upper connecting rod; 238. a lower connecting rod; 239. a limiting ring;

2311. an exhaust hole; 2312. a support rod; 2313. and (5) flanging.

Detailed Description

The following describes specific embodiments of the present application with reference to the drawings.

As shown in fig. 1, an air intake and exhaust device for an amphibious boat power system in this embodiment includes a pressure-resistant tank 5 disposed inside a boat body 6, an internal combustion engine system 4 is installed in the pressure-resistant tank 5, the internal combustion engine system 4 is connected with a pump-jet propeller 1 through a universal coupling 3, and an air intake system 10 and an exhaust system 20 are installed in the pressure-resistant tank 5 and are communicated with the outside of the boat body 6;

as shown in fig. 2 and 3, the exhaust system 20 has the structure that: the internal combustion engine system 4 in the pressure-resistant tank 5 is connected to the exhaust pipe 26, the other end of the exhaust pipe 26 is positioned at the inner wall of the boat 6 and is provided with a vertical upward opening facing to the outside, and exhaust gas discharged by the internal combustion engine system 4 in the pressure-resistant tank 5 is discharged out of the boat 6 through the exhaust pipe 26; the exhaust valve 21 is rotatably arranged at the outward opening end of the exhaust pipe 26, the water collecting bucket 231 is arranged at the inner side of the opening end of the exhaust pipe 26, the water collecting gate control mechanism 23 is arranged at the center of the water collecting bucket 231, and when the water collecting amount in the water collecting gate control mechanism 23 exceeds the outward exhaust force received by the exhaust valve 21, the exhaust valve 21 is closed.

For amphibious boats, the pump jet propeller 1 generates thrust based on momentum law, when the jet produced by the main pump is ejected from the nozzle, the flow speed of the jet is higher than the ship speed, so that the change of momentum of water flowing through the propeller in unit time forms the thrust of the propeller; the power of the pump jet propeller 1 is derived from an internal combustion engine system 4, and a power output shaft of the internal combustion engine system 4 is connected with a power input shaft of the pump jet propeller 1 through a universal coupling 3; the amphibious boat is also provided with an electric propeller 2, the electric propeller 2 adopts a battery to drive an underwater propeller as navigation power, and the water propeller is driven by a propulsion motor to form the thrust of the propeller. Normally, when the amphibious boat sails on the water surface, the internal combustion engine system 4 acts on the pump-jet propeller 1 to form sailing power; when the amphibious boat is underwater, the electric propeller 2 forms sailing power; in the sailing process, it is necessary to ensure that the internal combustion engine system 4 and its auxiliary equipment are always in a stable and reliable waterproof environment.

The pressure-resistant tank 5 provides a normal pressure-resistant working environment for the internal combustion engine system 4; in the water surface sailing state, the water line is very close to the air inlets and the air outlets of the air inlet system 10 and the air outlet system 20 of the amphibious boat, waves can necessarily affect the air inlet system 10 and the air outlet system 20 in the sailing process, and therefore corresponding wave (watertight) prevention measures are key for ensuring that the internal combustion engine system 4 and other systems can work normally in the water surface sailing state.

In this embodiment, the exhaust valve 21 at the air outlet of the exhaust system 20 is opened under the action of the exhaust force, and the water collecting bucket 231 is provided to collect the water entering the exhaust pipe 26 of the exhaust system 20, so that the water entering the pressure-resistant tank 5 through the exhaust system 20 is effectively reduced and prevented.

In this embodiment, the exhaust valve 21 at the end of the exhaust system 20 is opened under the action of the exhaust force, the water entering the exhaust system 20 is collected by the water collecting gate mechanism 23, and when the amount of water collected in the water collecting gate mechanism 23 exceeds the outward exhaust force received by the exhaust valve 21, the exhaust valve 21 is closed; the watertight structure between the exhaust valve 21 and the boat body 6 is combined, so that the relative balance relationship between the exhaust force formed by the exhausted exhaust gas flow and the water gravity of the seawater flowing into the exhaust pipe 26 is effectively utilized, and the autonomous and passive closure of the exhaust pipe 26 is realized.

The exhaust pipe 26 is arranged in the boat body 6 in an L-shaped structure, the end head of the horizontal part of the exhaust pipe 26 is connected into the pressure-resistant tank body 5, an exhaust axial flow fan 24 and an exhaust butterfly valve 25 are sequentially arranged in the end head of the horizontal part of the exhaust pipe 26, the exhaust butterfly valve 25 controls the on-off switching of the exhaust pipe 26, and the exhaust axial flow fan 24 discharges the exhaust gas of the internal combustion engine system 4 outwards through the exhaust pipe 26.

The exhaust butterfly valve 25 is a valve composed of an electric actuator and a butterfly valve, and performs opening and closing and adjusting actions of the valve on the exhaust pipe 26 to control exhaust of exhaust gas and prevent water entering the exhaust pipe 26 from reentering the pressure-resistant tank 5; the exhaust axial flow fan 24 is a fan which still moves along the axial direction after the air flow passes through the fan impeller and is used for ventilation, ventilation and heat dissipation, namely, high-temperature exhaust gas discharged by the internal combustion engine system 4 is discharged outside the boat body 6.

Since the exhaust system 20 itself is configured to exhaust the gas outwardly, the exhaust gas flow will generate a repulsive force against the seawater that may enter the exhaust port, so the amphibious boat exhaust system 20 may be configured without changing the height of the exhaust port, which may facilitate navigation of the amphibious boat.

When the water quantity of the wave rushing into the exhaust system 20 is too large, the exhaust system 20 must take corresponding wave-proof (watertight) measures, and the water collecting gate control mechanism 23 is a device for ensuring the wave-proof (watertight) measures of the exhaust system 20 when the amphibious boat sails on the water surface; the water collection door control mechanism 23 presses the door frame 22 through the exhaust valve 21 to realize watertight exhaust port during underwater diving.

A door frame 22 is mounted on the boat body 6 at the end of the exhaust pipe 26 and is fitted with the exhaust valve 21 in a sealing manner, for example, watertight rubber or the like is provided at the joint of the exhaust valve 21 and the door frame 22.

An exhaust drain pipe 28 is arranged on the bottom surface of the horizontal part of the exhaust pipe 26 in a communicating way, and the water collecting gate control mechanism 23 is communicated with the exhaust drain pipe 28 through a pipeline; an exhaust drain valve 27 is mounted in series on the exhaust drain pipe 28.

In this embodiment, the arrangement of the exhaust drain pipe 28 discharges the seawater possibly entering the exhaust system 20 to the outside, so as to ensure that the seawater does not enter the pressure-resistant tank 5 along the exhaust pipe 26; the exhaust drain valve 27 is electrically controlled, and seawater in the exhaust drain pipe 28 can be discharged outside the hull 6 by switching the opening and closing of the exhaust drain valve 27 as needed.

As shown in fig. 4 and 5, the water collection bucket 231 has a conical structure with a large top and a small bottom, i.e. a funnel shape, the water collection bucket 231 is provided with a vent hole 2311 which penetrates up and down, the center of the bottom surface of the water collection bucket 231 is penetrated and connected with a water collection cylinder 234 downwards, a balance block 233 is movably installed in the water collection cylinder 234 upwards and downwards, the center of the top surface of the balance block 233 is upwards extended with a lower connecting rod 238, the top end of the lower connecting rod 238 is rotatably provided with an upper connecting rod 237, the top end of the upper connecting rod 237 is rotatably installed with the exhaust valve 21, and the balance block 233 moves up and down relative to the water collection cylinder 234 to form the water collection gate control mechanism 23 for controlling the switching of the opening and the closing of the exhaust valve 21.

In the water collection gate control mechanism 23 of the embodiment, the balance weight 233 can be made of MC nylon, and the rest parts can be made of stainless steel; MC nylon is also called casting nylon, is made of polylactam, has various unique properties such as light weight, high strength, wear resistance, self lubrication, corrosion resistance, insulation and the like, is named as a 'water bearing', and is particularly suitable for being used as a bearing in water, so that the gap between the balance weight 233 and the water collection cylinder 234 can be controlled to be very small, and the up-and-down movement of the balance weight 233 in the water collection cylinder 234 can not be influenced.

A retaining ring 232 is arranged on the inner wall surface of the water collection barrel 234 above the balance weight 233, and the retaining ring 232 limits the upward moving distance of the balance weight 233 relative to the water collection barrel 234; as shown in fig. 6, the opening of the water collecting cylinder 234 is supported with a limit ring 239 via a strut 2312, and the lower link 238 penetrates the limit ring 239 upward, and the limit ring 239 guides the up-and-down movement of the lower link 238 stably and reliably.

When the balance weight 233 is positioned at a low position relative to the water collecting cylinder 234, a first drain pipe 235 is communicated and installed on the wall surface of the water collecting cylinder 234 positioned at the top surface of the balance weight 233, and the first drain pipe 235 is communicated with the exhaust drain pipe 28; a drain pipe two 236 is installed at the bottom end of the water collecting cylinder 234 and communicated with the exhaust drain pipe 28.

In this embodiment, the water collecting cylinder 234 has a cylindrical structure with a closed bottom, and the water collecting cylinder 234 drains water to the exhaust and drain pipe 28 through the first drain pipe 235 and the second drain pipe 236 which are connected.

The exhaust holes 2311 are circumferentially spaced on the tapered surface of the sump 231, and the single exhaust holes 2311 are arranged in an inclined direction of the tapered surface, and edges of the single exhaust holes 2311 extend toward the inside of the sump 231 to form flanges 2313, as shown in fig. 7.

In this embodiment, the arrangement of the vent hole 2311 on the water collection bucket 231 effectively ensures the normal exhaust of the exhaust system 20, and the arrangement of the flange 2313 at the edge of the vent hole 2311 effectively plays a role in blocking the seawater flowing into the exhaust system 20, and the flange 2313 prevents the seawater from flowing into the exhaust pipe 26 through the vent hole 2311, so that the seawater flows into the water collection barrel 234 downwards along the inner wall surface of the water collection bucket 231 through the blocking of the flange 2313.

Of course, for the very small amount of seawater flowing into the exhaust pipe 26 beyond the flange 2313, on one hand, the exhaust force is received in the exhaust pipe 26 and the free flow in the exhaust pipe 26 is difficult, and on the other hand, the exhaust drain pipe 28 provided at the bottom surface of the exhaust pipe 26 also plays a role of draining water, thereby effectively preventing water inflow of the exhaust system 20.

As shown in fig. 8, the intake system 10 has a structure in which: the device comprises a fixed pipe 13 which is arranged in a boat body 6 in an L-shaped structure, wherein a lifting inner pipe 11 is arranged in the vertical part of the fixed pipe 13, the lifting inner pipe 11 is driven by a lifting mechanism 12 to extend upwards and outwards or retract relative to the boat body 6, and external air is communicated with the inside of the fixed pipe 13 through the lifting inner pipe 11 when the lifting inner pipe is in an extending state; the horizontal part of the fixed pipe 13 is communicated into the pressure-resistant tank body 5; a sealing assembly 18 is arranged between the lifting inner tube 11 and the fixed tube 13, and the lifting inner tube 11 and the fixed tube 13 are sealed by the sealing assembly 18 in a state that the lifting inner tube 11 is retracted or extended relative to the fixed tube 13.

In this embodiment, the lifting inner tube 11 in the air intake system 10 is a thin-walled circular tube with a diameter smaller than that of the fixed tube 13, after the lifting inner tube 11 moves up and extends out of the boat body 6 relative to the fixed tube 13, a passage is formed between the external air and the fixed tube 13 by the lifting inner tube 11, so that the air inlet is far higher than the waterline by lifting the air inlet end of the air inlet tube, waves are prevented from being driven into the air intake system 10, water is effectively reduced and prevented from entering the pressure-resistant tank body 5 through the air intake system 10, and meanwhile, the air outside the boat body 6 can be effectively ensured to be introduced into the pressure-resistant tank body 5 for operation of the internal combustion engine system 4.

The sealing component 18 between the lifting inner pipe 11 and the fixed pipe 13 in the air inlet system 10 effectively ensures the watertight requirement between the lifting inner pipe 11 and the fixed pipe 13 under two different states of lifting or retracting the lifting inner pipe 11, realizes bidirectional watertight, and effectively solves the watertight problem of the amphibious boat engine room air inlet system 10.

An air inlet axial flow fan 15 and an air inlet butterfly valve 14 are sequentially arranged in the end head of the horizontal part of the fixed pipe 13.

The air inlet axial flow fan 15 is a fan which still moves along the axial direction after the air flow passes through the fan impeller and is used for ventilation, ventilation and heat dissipation, namely, the air outside the boat body 6 is introduced into the pressure-resistant tank body 5 for the operation of the internal combustion engine system 4; the air intake butterfly valve 14 is a valve composed of an electric actuator and a butterfly valve, and performs opening and closing and adjusting actions of the valve on the fixed pipe 13, and is used for controlling air outside the boat body 6 to be introduced and preventing water entering the fixed pipe 13 from reentering the pressure-resistant tank body 5.

The bottom surface of the horizontal part of the fixed pipe 13 is communicated with an air inlet and drain pipe 16, and an air inlet and drain valve 17 is arranged on the air inlet and drain pipe 16 in series.

In the embodiment, the air inlet and water drain valve 17 adopts an electric control mode, and can drain the seawater possibly flowing in the fixed pipe 13 out of the boat body 6 according to the requirement; one end of the air inlet and drain pipe 16 is connected to the lowest point of the fixed pipe 13, and the other end is connected to the air inlet and drain valve 17, so as to drain the seawater possibly entering the fixed pipe 13, and ensure that the seawater does not enter the pressure-resistant tank 5.

As shown in fig. 9, 10 and 11, the elevating mechanism 12 has a structure in which: the device comprises linear power mechanisms 123 symmetrically arranged outside two sides of a fixed pipe 13 and with upward output ends, wherein the bottom end fixing part of the linear power mechanism 123 is arranged on a boat body 6 through a support 121, and the output ends of the linear power mechanisms 123 are fixedly arranged on the top of an inner lifting pipe 11 through a first locking nut 126, such as an end plate 181, so that the inner lifting pipe 11 is driven to move up and down relative to the fixed pipe 13 through the work of the linear power mechanisms 123, and the switching between extension and retraction is reliable; the outside of the fixed pipe 13 is symmetrically provided with a guide stay pipe 124, the guide stay pipe 124 is arranged on the boat body 6 through the mounting seat 122, the guide stay pipe 124 is internally provided with a guide inner pipe 125 in a sliding manner along the length direction, the top end of the guide inner pipe 125 is fixedly arranged on the top of the lifting inner pipe 11, such as an end plate 181 through a locking nut 127, and the sliding direction of the guide inner pipe 125 relative to the guide stay pipe 124 is consistent with the power output direction of the linear power mechanism 123, so that the guide inner pipe 125 moves relative to the guide stay pipe 124 to provide a guiding effect on the movement of the lifting inner pipe 11 relative to the fixed pipe 13.

In this embodiment, the linear power mechanism 123 may be a power mechanism that outputs linear power, such as an air cylinder, an oil cylinder, an electric push rod, or the like.

In this embodiment, after the lifting inner tube 11 extends out relative to the fixed tube 13, the lifting inner tube 11 can be supported and reinforced by the cooperation between the guiding inner tube 125 and the guiding supporting tube 124 and the combination of the linear power mechanism 123, so as to reduce or even prevent the damage to the lifting inner tube 11 caused by sea waves and the like.

As shown in fig. 12, 13, 14 and 15, an end plate 181 is mounted on the top end of the lifting inner tube 11 in a sealing manner, and an air inlet hole 111 is formed in the upper portion of the side wall surface of the lifting inner tube 11 in a penetrating manner; the outer wall surface of the lifting inner tube 11 positioned above the air inlet hole 111 is sleeved with a first waterproof rubber 182, and the lower part of the outer wall surface of the lifting inner tube 11 is sleeved with a second waterproof rubber 184; an upper clamping ring 183 is arranged on the inner wall surface of the fixed pipe 13 between the first waterproof rubber 182 and the second waterproof rubber 184, the first waterproof rubber 182 is attached to the top surface of the upper clamping ring 183 or the second waterproof rubber 184 is attached to the bottom surface of the upper clamping ring 183, and the sealing assembly 18 is formed.

In this embodiment, the end plate 181 is used to close the top opening of the lifting inner tube 11, and the installation base between the lifting inner tube 11 and the linear power mechanism 123 and the guiding inner tube 125 in the lifting mechanism 12 is formed by the arrangement of the end plate 181.

Because the air inlet system 10 is used for sucking air, when the amphibious boat sails on the water surface, the height of the air inlet is changed, so that the air suction is ensured, and water suction is effectively reduced or even prevented, the normal operation of the internal combustion engine system 4 is ensured, and meanwhile, the water tightness at the air inlet is further ensured by the adhesion between the waterproof rubber II 184 and the upper clamping ring 183 after the lifting inner pipe 11 extends out; in the underwater diving state, the air inlet system 10 effectively guarantees the watertight of the air inlet by descending the lifting inner pipe 11 and utilizing the end plate 181 at the upper end of the lifting inner pipe 11 and combining the joint between the waterproof rubber I182 and the upper clamping ring 183 after the lifting inner pipe 11 descends; thereby realizing the bidirectional watertight of the air inlet system 10 under different states of water surface and submarine.

In this embodiment, the lower snap ring 185 is fixedly mounted under the second waterproof rubber 184 on the outer wall surface of the lifting inner tube 11, which plays a structural supporting role on the second waterproof rubber 184, especially when the second waterproof rubber 184 is attached to the upper snap ring 183, the attachment and watertight performance between the second waterproof rubber 184 and the upper snap ring 183 is effectively ensured by the lower snap ring 185.

The upper snap ring 183 and the lower snap ring 185 can be annular structures with rectangular cross sections, and the waterproof rubber I182 and the waterproof rubber II 184 can be annular structures with rectangular cross sections or circle centers.

The specific usage modes of the air intake system 10 and the exhaust system 20 in the application are as follows:

for the air intake system 10, when the amphibious boat is in a water surface sailing state, the pump jet propeller 1 is driven to work by the internal combustion engine system 4 to sail, in the state, the lifting mechanism 12 drives the lifting inner tube 11 to ascend relative to the fixed tube 13, external air can enter through an air inlet 111 at the upper side of the lifting inner tube 11, and enters the pressure-resistant tank 5 after passing through the fixed tube 13 for operation of the internal combustion engine system 4; the lifting of the lifting inner pipe 11 effectively prevents the external seawater from entering, and the bonding between the waterproof rubber II 184 on the lifting inner pipe 11 and the upper clamping ring 183 effectively ensures the watertight of the structure; when the amphibious boat is in a submarine state, the lifting mechanism 12 drives the lifting inner tube 11 to retract into the fixed tube 13, and the end plate 181 at the end part of the lifting inner tube 11 is combined with the joint between the waterproof rubber I182 and the upper clamping ring 183 after the lifting inner tube 11 is lowered, so that the watertight of the air inlet system 10 is effectively ensured.

For the exhaust system 20, the up-and-down movement of the balance weight 233 is controlled by changing the balance force between the water gravity and the exhaust force, and finally the opening and closing of the exhaust valve 21 is realized. When the amphibious boat is in a water surface sailing state, the internal combustion engine system 4 is in a working state, the exhaust axial flow fan 24 can discharge hot waste gas in the pressure-resistant tank body 5, the exhaust force acting on the exhaust valve 21 can enable the exhaust valve 21 to turn outwards relative to the boat body 6 to be in an opening state, and meanwhile, the upper connecting rod 237, the lower connecting rod 238 and the balance weight 233 rotate or move upwards, so that the hot waste gas is smoothly discharged; when the amphibious boat encounters a wave during travel, there may be a surge of seawater into the exhaust system 20, where most of the seawater will flow into the catchment tank 234 through the catchment funnel 231, and a small portion of the seawater will flow into the exhaust pipe 26 through the exhaust hole 2311 of the catchment funnel 231, which may be discharged via the exhaust drain pipe 28 and the exhaust drain valve 27. When the gravity of the seawater flowing into the water collecting cylinder 234 is greater than the exhaust force generated by the exhaust axial flow fan 24, the gravity of the seawater will force the balance weight 233 to move downwards relative to the water collecting cylinder 234, and simultaneously drive the upper connecting rod 237 and the lower connecting rod 238 to rotate or move downwards until the exhaust valve 21 is closed. By cooperating with the sensor control system, when the exhaust valve 21 is closed for a certain time or the pressure in the exhaust system 20 reaches a certain limit value, it is indicated that the incoming seawater has affected the normal operation of the exhaust system 20. The corresponding sensor will then send a stop message to the control system of the combustion engine system 4 and control the combustion engine system 4 to stop. All the seawater flowing into the water collecting cylinder 234 is discharged through the exhaust drain pipe 28 and the exhaust drain valve 27. When all the seawater is drained, the weight 233 is also lost, and the internal combustion engine system 4 can be restarted. As the exhaust axial flow fan 24 again generates an increasing exhaust force acting on the exhaust valve 21, the exhaust valve 21 gradually opens and enters a normal exhaust operating state when the exhaust force is greater than the total weight of all moving parts of the upper link 237, lower link 238, counterweight 233, and exhaust valve 21.

The amphibious boat engine room water-proof device effectively solves the problem of wave prevention and water tightness of the amphibious boat engine room under different sailing states, and greatly ensures the normal sailing of the amphibious boat.

The above description is intended to illustrate the application and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the application.

Claims (10)

1. The utility model provides an amphibious ship power system is with advance exhaust apparatus, is including setting up in the inside withstand voltage jar body (5) of hull (6), installs internal-combustion engine system (4) in withstand voltage jar body (5), and internal-combustion engine system (4) link up through universal joint (3) power has pump to spout propeller (1), its characterized in that: an air inlet system (10) and an exhaust system (20) are arranged in the pressure-resistant tank body (5) and communicated with the exterior of the boat body (6);

the exhaust system (20) has a structure in which: the internal combustion engine system (4) in the pressure-resistant tank body (5) is connected to one end of the exhaust pipe (26), and the other end of the exhaust pipe (26) is positioned at the inner wall of the boat body (6) and provided with an opening facing vertically upwards and outwards; the exhaust valve (21) is rotatably arranged at the outward opening end of the exhaust pipe (26), the water collecting bucket (231) is arranged at the inner side of the opening end of the exhaust pipe (26), the water collecting gate control mechanism (23) is arranged at the center of the water collecting bucket (231), and when the water collecting amount in the water collecting gate control mechanism (23) exceeds the outward exhaust force received by the exhaust valve (21), the exhaust valve (21) is closed.

2. An intake and exhaust apparatus for an amphibious boat power system as defined in claim 1 wherein: the exhaust pipe (26) is arranged in the boat body (6) in an L-shaped structure, the end head of the horizontal part of the exhaust pipe (26) is connected into the pressure-resistant tank body (5), an exhaust axial flow fan (24) and an exhaust butterfly valve (25) are sequentially arranged in the end head of the horizontal part of the exhaust pipe (26), the exhaust butterfly valve (25) is used for controlling the on-off switching of the exhaust pipe (26), and the exhaust axial flow fan (24) is used for exhausting the exhaust gas of the internal combustion engine system (4) outwards through the exhaust pipe (26); a door frame (22) which is assembled with the exhaust valve (21) in a sealing way is arranged on the boat body (6) at the end part of the exhaust pipe (26).

3. An intake and exhaust apparatus for an amphibious boat power system as defined in claim 2 wherein: an exhaust drain pipe (28) is arranged on the bottom surface of the horizontal part of the exhaust pipe (26) in a communicating way, and the water collecting gate control mechanism (23) is communicated with the exhaust drain pipe (28) through a pipeline; an exhaust drain valve (27) is arranged on the exhaust drain pipe (28) in series.

4. An intake and exhaust apparatus for an amphibious boat power system as defined in claim 1 wherein: the water collecting hopper (231) is of a conical structure with a large upper part and a small lower part, an exhaust hole (2311) which is communicated up and down is formed in the water collecting hopper (231), a water collecting cylinder (234) is connected in a downward communicated mode at the center of the bottom surface of the water collecting hopper (231), a balancing block (233) is movably installed in the water collecting cylinder (234) up and down, a lower connecting rod (238) is upwards arranged at the center of the top surface of the balancing block (233) in an extending mode, an upper connecting rod (237) is rotatably installed at the top end of the lower connecting rod (238), the top end of the upper connecting rod (237) is rotatably installed with the exhaust valve (21), and the balancing block (233) moves up and down relative to the water collecting cylinder (234) to form a water collecting gate control mechanism (23) for controlling the opening and closing of the exhaust valve (21).

5. The intake and exhaust device for an amphibious boat power system of claim 4, wherein: a retaining ring (232) is arranged on the inner wall surface of the water collection cylinder (234) above the balance block (233), and the retaining ring (232) limits the upward moving distance of the balance block (233) relative to the water collection cylinder (234); a limiting ring (239) is supported at the opening of the water collection cylinder (234) through a supporting rod (2312), and a lower connecting rod (238) upwards penetrates through the limiting ring (239).

6. The intake and exhaust device for an amphibious boat power system of claim 4, wherein: when the balance block (233) is positioned at a low position relative to the water collecting cylinder (234), a first water drain pipe (235) is arranged on the wall surface of the water collecting cylinder (234) positioned at the top surface of the balance block (233) in a communicating manner, and the first water drain pipe (235) is communicated with an exhaust water drain pipe (28); and a second water drain pipe (236) is arranged at the bottom end of the water collecting cylinder (234) towards the exhaust water drain pipe (28) in a communicated manner.

7. The intake and exhaust device for an amphibious boat power system of claim 4, wherein: the exhaust holes (2311) are distributed on the conical surface of the water collection bucket (231) at intervals along the circumferential direction, the single exhaust holes (2311) are distributed along the inclined direction of the conical surface, and the edges of the single exhaust holes (2311) extend towards the inside of the water collection bucket (231) to form flanges (2313).

8. An intake and exhaust apparatus for an amphibious boat power system as defined in claim 1 wherein: the structure of the air inlet system (10) is as follows: comprises a fixed pipe (13) which is arranged in a boat body (6) in an L-shaped structure, wherein a lifting inner pipe (11) is arranged in the vertical part of the fixed pipe (13), the lifting inner pipe (11) is driven by a lifting mechanism (12) to extend or retract upwards and outwards relative to the boat body (6), and external air is communicated with the inside of the fixed pipe (13) through the lifting inner pipe (11) when the lifting inner pipe is in an extending state; the horizontal part of the fixed pipe (13) is communicated into the pressure-resistant tank body (5); a sealing component (18) is assembled between the lifting inner tube (11) and the fixed tube (13), and the sealing component (18) seals between the lifting inner tube (11) and the fixed tube (13) in a state that the lifting inner tube (11) is retracted or extended relative to the fixed tube (13).

9. The intake and exhaust apparatus for an amphibious boat power system of claim 8, wherein: an air inlet axial flow fan (15) and an air inlet butterfly valve (14) are sequentially arranged in the end head of the horizontal part of the fixed pipe (13), an air inlet drain pipe (16) is arranged on the bottom surface of the horizontal part of the fixed pipe (13) in a communicated mode, and an air inlet drain valve (17) is arranged on the air inlet drain pipe (16) in a serial connection mode.

10. The intake and exhaust apparatus for an amphibious boat power system of claim 8, wherein: an end plate (181) is arranged at the top end of the lifting inner tube (11) in a sealing manner, and an air inlet hole (111) is formed in the upper part of the side wall surface of the lifting inner tube (11) in a penetrating manner; the outer wall surface of the lifting inner tube (11) above the air inlet hole (111) is sleeved with waterproof rubber I (182), and the lower part of the outer wall surface of the lifting inner tube (11) is sleeved with waterproof rubber II (184); an upper clamping ring (183) is arranged on the inner wall surface of the fixed pipe (13) between the waterproof rubber I (182) and the waterproof rubber II (184), the waterproof rubber I (182) is attached to the top surface of the upper clamping ring (183) or the waterproof rubber II (184) is attached to the bottom surface of the upper clamping ring (183), and a sealing assembly (18) is formed.