Exhaust device for amphibious vehicle power system

Abstract

The application relates to an air intake and exhaust device for a power system of an amphibious vehicle, which comprises a pressure-resistant tank arranged in the vehicle body, an internal combustion engine system installed in the pressure-resistant tank, a pump-jet propeller connected with the internal combustion engine system through a universal coupling, an air intake system and an exhaust system communicated with the outside of the vehicle body and the inside of the pressure-resistant tank, wherein the exhaust system comprises an exhaust pipe, one end of the exhaust pipe is connected with the internal combustion engine system in the pressure-resistant tank, the other end of the exhaust pipe is located at the inner wall of the vehicle body and is provided with an opening vertically upward and outward, a damper is rotatably arranged at the opening end of the exhaust pipe, a water collecting bucket is arranged at the inner side of the opening end of the exhaust pipe, a 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 damper, the damper is closed, so that the automatic and passive closing of the exhaust pipe is realized, the problem of wave prevention and water tightness of the amphibious vehicle under different navigation states is effectively solved, and the normal navigation of the amphibious vehicle is greatly ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the amphibious craft technical field, especially an amphibious craft power system air intake and exhaust device. BACKGROUND

[0002] The amphibious craft characterized by water surface and underwater navigation state can navigate at high speed on water surface and at low speed in underwater navigation state.

[0003] When navigating on water surface, the amphibious craft uses internal combustion engine system to drive water jet propeller as navigation power, at this time, the engine room needs to meet the use requirements of wave protection (water tightness), air intake and exhaust, that is, the air intake system and exhaust system must be well protected against waves (water tightness) to ensure the normal operation of the internal combustion engine system in the engine room; when underwater navigation, the amphibious craft uses battery to drive underwater propeller as navigation power, at this time, the engine room must still use corresponding water tight protection measures to ensure the water tightness of the engine room.

[0004] Due to the use of the amphibious craft in two navigation states, the working environment of the engine room is completely different, and the water tightness measures are completely different. The wave protection (water tightness) measures of the corresponding air intake system and exhaust system must ensure that the internal combustion engine system can work normally in both states to ensure that seawater does not flow into the engine room through the air intake system or exhaust system. SUMMARY

[0005] The applicant provides an amphibious craft power system air intake and exhaust device with reasonable structure to effectively solve the wave protection and water tightness problems of the engine room of the amphibious craft in different navigation states, and greatly ensures the normal navigation of the amphibious craft.

[0006] The technical scheme adopted by the present application is as follows:

[0007] An amphibious craft power system air intake and exhaust device, comprising a pressure-resistant tank body arranged in the body of the amphibious craft, an internal combustion engine system is installed in the pressure-resistant tank body, the internal combustion engine system is power-connected with a pump-jet propeller through a universal coupling, an air intake system and an exhaust system are installed in communication with the outside of the body and the inside of the pressure-resistant tank body.

[0008] The structure of 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 located at the inner wall of the body and is provided with an opening vertically upward and outward; an exhaust valve is rotatably installed at the outward opening end of the exhaust pipe, a water collecting hopper is installed inside the opening end of the exhaust pipe, a water collecting door control mechanism is installed at the center of the water collecting hopper, and when the amount of water collected in the water collecting door control mechanism exceeds the outward exhaust force received by the exhaust valve, the exhaust valve is closed.

[0009] As a further improvement of the above technical solution:

[0010] The exhaust pipe is arranged in an L-shaped structure inside the boat body, the end of the horizontal part of the exhaust pipe is connected to the inside of the pressure tank, and an exhaust axial fan and an exhaust butterfly valve are installed in the end of the horizontal part of the exhaust pipe in sequence, the exhaust butterfly valve controls the on-off switching of the exhaust pipe, and the exhaust axial fan exhausts the exhaust gas of the internal combustion engine system through the exhaust pipe; a door frame matched with the exhaust door is installed on the boat body at the end of the exhaust pipe.

[0011] A bottom surface of the horizontal part of the exhaust pipe is communicated with an exhaust drain pipe, and a water collecting door control mechanism is communicated with the exhaust drain pipe through a pipeline; an exhaust drain valve is installed in series on the exhaust drain pipe.

[0012] The water collecting bucket has a conical structure with a large upper part and a small lower part, an exhaust hole penetrating up and down is formed in the water collecting bucket, a water collecting cylinder is connected downward and penetrates through the center of the bottom surface of the water collecting bucket, a balance block is movably installed in the water collecting cylinder, a lower connecting rod extends upward from 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, and the upper connecting rod is rotatably installed at the top end of the exhaust door; the up-down movement of the balance block relative to the water collecting cylinder constitutes a water collecting door control mechanism for controlling the opening and closing of the exhaust door.

[0013] A retaining ring is supported by a support rod at the opening of the water collecting cylinder above the balance block, and the lower connecting rod penetrates upward through the retaining ring.

[0014] When the balance block is at a low position relative to the water collecting cylinder, a first drain pipe is communicated and installed on the wall surface of the water collecting cylinder at the top surface of the balance block, and the first drain pipe is communicated to the exhaust drain pipe; a second drain pipe is communicated and installed at the bottom end of the water collecting cylinder towards the exhaust drain pipe.

[0015] The exhaust holes are arranged on the conical surface of the water collecting bucket in a circumferential interval, and each exhaust hole is arranged along the inclination direction of the conical surface, and the edge of each exhaust hole extends inward to form a flange.

[0016] The structure of the air intake system is as follows: a fixed pipe arranged in an L-shaped structure inside the boat body, a lifting inner pipe is installed in the vertical part of the fixed pipe, the lifting inner pipe is driven by a lifting mechanism to extend outward or retract upward relative to the boat body, and the external air is communicated through the lifting inner pipe and the inside of the fixed pipe in the extended state; the horizontal part of the fixed pipe is communicated to the inside of the pressure tank; a sealing assembly is matched between the lifting inner pipe and the fixed pipe, and the sealing assembly seals between the lifting inner pipe and the fixed pipe in the retracted or extended state of the lifting inner pipe relative to the fixed pipe.

[0017] The end of the fixed pipe horizontal part is sequentially provided with an air inlet axial flow fan and an air inlet butterfly valve, and the bottom surface of the fixed pipe horizontal part is communicated with an air inlet drain pipe, and the air inlet drain pipe is sequentially provided with an air inlet drain valve.

[0018] The top end of the lifting inner pipe is closed and provided with an end plate, the upper portion of the side wall surface of the lifting inner pipe is provided with an air inlet hole, the outer wall surface of the lifting inner pipe above the air inlet hole is sleeved with waterproof rubber I, and the lower portion of the outer wall surface of the lifting inner pipe is sleeved with waterproof rubber II; the inner wall surface of the fixed pipe between waterproof rubber I and waterproof rubber II is provided with an upper clamping ring, and waterproof rubber I is attached to the top surface of the upper clamping ring or waterproof rubber II is attached to the bottom surface of the upper clamping ring, thereby forming a sealing assembly.

[0019] The present application has the following advantages:

[0020] The present application has the following advantages:

[0021] The present application has the following advantages:

[0022] The sealing assembly between the lifting inner pipe and the fixed pipe in the air inlet system effectively ensures the water-tight requirement between the lifting inner pipe and the fixed pipe in the two different states of lifting and retracting, realizes bidirectional water-tightness, and effectively solves the water-tight problem of the air inlet system of the amphibious vehicle engine room. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application has the following advantages:

[0024] Figure 2 The present application has the following advantages:

[0025] Figure 3 The present application has the following advantages:

[0026] Figure 4 The present application has the following advantages:

[0027] Figure 5 The present application has the following advantages:

[0028] Figure 6 is a plan view of the water collecting basin of the present application.

[0029] Figure 7 is a sectional view along A-A of the water collecting basin of the present application. Figure 6 is an enlarged view of B in FIG. 4.

[0030] Figure 8 is a structural schematic view of the air intake system of the present application (the inner lifting pipe is extended).

[0031] Figure 9 is a structural schematic view of the lifting mechanism of the present application (the inner lifting pipe is retracted).

[0032] Figure 10 is a structural schematic view of the lifting mechanism of the present application (the inner lifting pipe is extended).

[0033] Figure 11 is a left view of the sealing assembly of the present application. Figure 10

[0034] Figure 12 is a structural schematic view of the sealing assembly of the present application (the inner lifting pipe is retracted).

[0035] Figure 13 is a sectional view along A-A of the sealing assembly of the present application. Figure 12

[0036] Figure 14 is a structural schematic view of the sealing assembly of the present application (the inner lifting pipe is extended).

[0037] Figure 15 is a sectional view along A-A of the sealing assembly of the present application. Figure 14

[0038] wherein: 1, pump jet propeller; 2, electric propeller; 3, universal coupling; 4, internal combustion engine system; 5, pressure-resistant tank body; 6, boat body; 10, air intake system; 20, exhaust system;

[0039] 11, inner lifting pipe; 12, lifting mechanism; 13, fixed pipe; 14, air intake butterfly valve; 15, air intake axial flow fan; 16, air intake drain pipe; 17, air intake drain valve; 18, sealing assembly;

[0040] 111, air intake hole;

[0041] 121, support; 122, mounting seat; 123, linear power mechanism; 124, guide support pipe; 125, guide inner pipe; 126, locking nut one; 127, locking nut two;

[0042] 181, end plate; 182, waterproof rubber one; 183, upper snap ring; 184, waterproof rubber two; 185, lower snap ring;​​​

[0043] 21. Exhaust valve; 22. Door frame; 23. Water collection gate control mechanism; 24. Exhaust axial flow fan; 25. Exhaust butterfly valve; 26. Exhaust pipe; 27. Exhaust drain valve; 28. Exhaust drain pipe;

[0044] 231. Water collection hopper; 232. Retaining ring; 233. Balance block; 234. Water collection cylinder; 235. Drain pipe one; 236. Drain pipe two; 237. Upper connecting rod; 238. Lower connecting rod; 239. Limiting ring;

[0045] 2311. Vent hole; 2312. Support rod; 2313. Flanged edge. Detailed Implementation

[0046] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0047] like Figure 1 As shown, an amphibious boat power system intake and exhaust device of this embodiment includes a pressure tank 5 disposed inside the hull 6, an internal combustion engine system 4 installed inside the pressure tank 5, and a pump-jet propulsion device 1 poweredly connected to the internal combustion engine system 4 via a universal coupling 3. An intake system 10 and an exhaust system 20 are installed between the outside of the hull 6 and the inside of the pressure tank 5.

[0048] like Figure 2 and Figure 3 As shown, the structure of the exhaust system 20 is as follows: it includes an exhaust pipe 26, one end of which is connected to the internal combustion engine system 4 inside the pressure tank 5, and the other end of which is located on the inner wall of the hull 6 and has a vertically upward opening facing outward. The exhaust gas discharged from the internal combustion engine system 4 inside the pressure tank 5 is discharged to the outside of the hull 6 through the exhaust pipe 26; an exhaust valve 21 is rotatably installed at the outward opening end of the exhaust pipe 26, and a water collection hopper 231 is installed inside the opening end of the exhaust pipe 26. A water collection gate control mechanism 23 is installed at the center of the water collection hopper 231. When the amount of water collected in the water collection gate control mechanism 23 exceeds the outward exhaust force on the exhaust valve 21, the exhaust valve 21 closes.

[0049] For amphibious assault boats, thrust is generated by the pump-jet propulsion unit 1 based on the momentum law. The high-speed jet generated by the main pump exits the nozzle at a velocity higher than the boat's speed; thus, the change in momentum of the water flowing through the propulsion unit per unit time creates the thrust. The power of the pump-jet propulsion unit 1 comes from the internal combustion engine system 4, which is connected to the power input shaft of the pump-jet propulsion unit 1 via a universal coupling 3. An electric propulsion unit 2 is also installed on the amphibious assault boat. This unit uses batteries to drive the underwater propulsion system, with the water propeller driven by a propulsion motor to generate thrust. Typically, when the amphibious assault boat is on the surface, the internal combustion engine system 4 acts on the pump-jet propulsion unit 1 to generate propulsion; when submerged, the electric propulsion unit 2 generates propulsion. During navigation, 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.

[0050] The pressure tank 5 provides a normal pressure-resistant working environment for the internal combustion engine system 4. When sailing on the surface, the waterline is very close to the air intake and exhaust ports of the amphibious boat's air intake system 10 and exhaust system 20. During the voyage, waves will inevitably affect the air intake system 10 and exhaust system 20. Therefore, the corresponding anti-wave (watertight) measures are the key to ensuring that the internal combustion engine system 4 and other systems can work normally under this condition.

[0051] In this embodiment, the exhaust valve 21 at the exhaust outlet of the exhaust system 20 opens under the action of exhaust force, and a water collection hopper 231 is set to collect the water entering the exhaust pipe 26 of the exhaust system 20, thereby effectively reducing and preventing water from entering the pressure tank 5 through the exhaust system 20.

[0052] In this embodiment, the exhaust valve 21 at the end of the exhaust system 20 opens under the action of exhaust force, and the water collection gate control mechanism 23 collects the water entering the exhaust system 20. When the amount of water collected in the water collection gate control mechanism 23 exceeds the outward exhaust force on the exhaust valve 21, the exhaust valve 21 closes. Combined with the watertight structure between the exhaust valve 21 and the hull 6, the relative balance between the exhaust force formed by the exhaust gas flow and the gravity of the seawater flowing into the exhaust pipe 26 is effectively utilized to realize the autonomous and passive closure of the exhaust pipe 26.

[0053] The exhaust pipe 26 is arranged in an L-shape inside the hull 6. The horizontal end of the exhaust pipe 26 is connected to the pressure tank 5. An exhaust axial flow fan 24 and an exhaust butterfly valve 25 are installed in sequence inside the horizontal end of the exhaust pipe 26. The exhaust butterfly valve 25 controls the switching of the exhaust pipe 26. The exhaust axial flow fan 24 discharges the exhaust gas of the internal combustion engine system 4 to the outside through the exhaust pipe 26.

[0054] The exhaust butterfly valve 25 is a valve composed of an electric actuator and a butterfly valve, which implements the opening and closing and regulating action of the valve on the exhaust pipe 26, and is used for controlling the exhaust of the exhaust gas and preventing the water entering the exhaust pipe 26 from entering the pressure tank body 5 again; the exhaust axial flow fan 24 is a fan in which the airflow still moves along the axial direction after passing through the fan impeller, which is used for ventilation, air exchange and heat dissipation, i.e. the high-temperature exhaust gas discharged from the internal combustion engine system 4 is discharged to the outside of the boat body 6.

[0055] Since the exhaust system 20 itself is to discharge gas outwardly, the discharged airflow will generate a repulsive force on the seawater that may enter the exhaust port, so the amphibious boat exhaust system 20 design can not change the height of the exhaust port, which is helpful for the navigation of the amphibious boat.

[0056] When the amount of water surging into the exhaust system 20 is too large, the exhaust system 20 must take corresponding wave-proof (water-tight) measures, and the water collecting door control mechanism 23 is a device for ensuring the wave-proof (water-tight) measures of the exhaust system 20 when the amphibious boat is navigating on the water surface; when diving underwater, the water collecting door control mechanism 23 realizes the water-tightness of the exhaust port by pressing the door frame 22 through the exhaust door 21.

[0057] The door frame 22 sealingly fitted with the exhaust door 21 is installed on the boat body 6 at the end of the exhaust pipe 26, such as water-tight rubber provided at the joint of the exhaust door 21 and the door frame 22.

[0058] The bottom surface of the horizontal part of the exhaust pipe 26 is connected and installed with the exhaust water drain pipe 28, and the water collecting door control mechanism 23 is connected with the exhaust water drain pipe 28 through the pipeline; the exhaust water drain valve 27 is installed in series on the exhaust water drain pipe 28.

[0059] In this embodiment, the seawater that may enter the exhaust system 20 is discharged outwardly through the exhaust water drain pipe 28, so as to ensure that the seawater will not enter the pressure tank body 5 along the exhaust pipe 26; the exhaust water drain valve 27 is electrically controlled, and the seawater in the exhaust water drain pipe 28 can be discharged to the outside of the boat body 6 through the opening and closing switching of the exhaust water drain valve 27 according to the needs.

[0060] As shown in Figure 4 and Figure 5 , the water collecting bucket 231 is a conical structure with a large upper part and a small lower part, i.e. a funnel shape, and the water collecting bucket 231 is provided with an exhaust hole 2311 penetrating upward and downward, and the bottom surface of the water collecting bucket 231 is connected and penetrated downward with the water collecting cylinder 234 at the center, the water collecting cylinder 234 is movably installed with the balance block 233 upward and downward, the top surface of the balance block 233 is extended upward with the lower connecting rod 238 at the center, the top end of the lower connecting rod 238 is rotatably installed with the upper connecting rod 237, and the top end of the upper connecting rod 237 is rotatably installed with the exhaust door 21, and the water collecting door control mechanism 23 for controlling the opening and closing switching of the exhaust door 21 is formed by the upward and downward movement of the balance block 233 relative to the water collecting cylinder 234.

[0061] In the water collecting gate mechanism 23 of the embodiment, the balance block 233 can be made of MC nylon material, and the remaining components can be made of stainless steel material; MC nylon, also known as cast nylon, is a material made of polyamide, which has many unique properties such as light weight, high strength, wear resistance, self-lubrication, corrosion resistance, and insulation, and is also known as "water bearing", which is particularly suitable for use as a bearing in water. Therefore, the gap between the balance block 233 and the water collecting cylinder 234 can be controlled to be very small, without affecting the up and down movement of the balance block 233 in the water collecting cylinder 234.

[0062] A retaining ring 232 is arranged on the inner wall surface of the water collecting cylinder 234 above the balance block 233, which limits the upward movement distance of the balance block 233 relative to the water collecting cylinder 234; as shown in Figure 6 The water collecting cylinder 234 is provided with a limiting ring 239 supported by a support rod 2312 at the opening, and the lower connecting rod 238 penetrates the limiting ring 239 upward, which stably guides the upward and downward movement of the lower connecting rod 238.

[0063] When the balance block 233 is at a low position relative to the water collecting cylinder 234, a water drain pipe one 235 is installed on the wall surface of the water collecting cylinder 234 at the top surface of the balance block 233, which is connected to the exhaust water drain pipe 28; a water drain pipe two 236 is installed at the bottom end of the water collecting cylinder 234 and connected to the exhaust water drain pipe 28.

[0064] In the embodiment, the water collecting cylinder 234 is a cylindrical structure with a closed bottom, and the water collecting cylinder 234 drains water to the exhaust water drain pipe 28 through the water drain pipe one 235 and the water drain pipe two 236.

[0065] The exhaust holes 2311 are arranged on the conical surface of the water collecting hopper 231 in a circumferential direction, and each exhaust hole 2311 is arranged along the inclined direction of the conical surface, and the edge of each exhaust hole 2311 extends inward to form a flange 2313. Figure 7

[0066] In the embodiment, the arrangement of the exhaust holes 2311 on the water collecting hopper 231 effectively ensures the normal exhaust of the exhaust system 20, and the arrangement of the flange 2313 at the edge of the exhaust hole 2311 effectively blocks the seawater flowing into the exhaust pipe 26, and the seawater is prevented from flowing into the exhaust pipe 26 through the exhaust hole 2311 by the flange 2313, so that the seawater flows downward along the inner wall surface of the water collecting hopper 231 into the water collecting cylinder 234.

[0067] Of course, for the small part of seawater flowing into the exhaust pipe 26 through the flange 2313, on the one hand, it is difficult to flow freely in the exhaust pipe 26 due to the exhaust force, and on the other hand, the exhaust water drain pipe 28 arranged at the bottom surface of the exhaust pipe 26 also plays a role in draining water, effectively preventing water from entering the exhaust system 20.​

[0068] like Figure 8 As shown, the structure of the air intake system 10 is as follows: it includes a fixed pipe 13 arranged in an L-shape inside the hull 6. A lifting inner pipe 11 is installed in the vertical part of the fixed pipe 13. The lifting inner pipe 11 is driven by the lifting mechanism 12 to extend upward and outward relative to the hull 6 or retract. When extended, external air passes through the lifting inner pipe 11 and the interior of the fixed pipe 13. The horizontal part of the fixed pipe 13 is connected to the pressure tank 5. A sealing component 18 is installed between the lifting inner pipe 11 and the fixed pipe 13. When the lifting inner pipe 11 is retracted or extended relative to the fixed pipe 13, the sealing component 18 seals the space between the lifting inner pipe 11 and the fixed pipe 13.

[0069] In this embodiment, the lifting inner pipe 11 in the air intake system 10 is a thin-walled circular pipe with a diameter smaller than that of the fixed pipe 13. After the lifting inner pipe 11 extends upward relative to the fixed pipe 13 and extends out of the hull 6, the lifting inner pipe 11 forms a passage between the external air and the fixed pipe 13. This raises the height of the air intake end of the air intake pipe, making the air intake port much higher than the waterline, preventing waves from entering the air intake system 10, effectively reducing and preventing water from entering the pressure tank 5 through the air intake system 10. At the same time, it can effectively ensure that the air outside the hull 6 is introduced into the pressure tank 5 for the operation of the internal combustion engine system 4.

[0070] The sealing component 18 between the lifting inner pipe 11 and the fixed pipe 13 in the air intake system 10 effectively ensures the watertightness between the lifting inner pipe 11 and the fixed pipe 13 in two different states: when the lifting inner pipe 11 is raised or retracted. This achieves bidirectional watertightness and effectively solves the watertightness problem of the amphibious boat engine room air intake system 10.

[0071] An intake axial flow fan 15 and an intake butterfly valve 14 are sequentially installed inside the horizontal end of the fixed pipe 13.

[0072] The intake axial flow fan 15 is a fan in which the airflow continues to move axially after passing through the fan impeller. It is used for ventilation, air exchange and heat dissipation, that is, to introduce the air outside the hull 6 into the pressure tank 5 for the operation of the internal combustion engine system 4. The intake butterfly valve 14 is a valve composed of an electric actuator and a butterfly valve. It performs the opening and closing and adjustment actions of the valve on the fixed pipe 13. It is used to control the introduction of air outside the hull 6 and prevent water entering the fixed pipe 13 from re-entering the pressure tank 5.

[0073] An air inlet and water outlet pipe 16 is connected to the bottom surface of the horizontal part of the fixed pipe 13, and an air inlet and water outlet valve 17 is connected in series on the air inlet and water outlet pipe 16.

[0074] In this embodiment, the air intake drain valve 17 is controlled by electricity, and can discharge seawater in the fixed pipe 13 outside the boat body 6 according to the need; the air intake drain pipe 16 is connected to the lowest point of the fixed pipe 13 at one end and connected to the air intake drain valve 17 at the other end, for discharging seawater that may enter the fixed pipe 13, to ensure that seawater cannot enter the pressure tank body 5.

[0075] As shown in Figure 9 , Figure 10 and Figure 11 , the lifting mechanism 12 is structured as follows: a linear power mechanism 123 is symmetrically installed on both sides of the fixed pipe 13, with the output end upward, the bottom end fixed part of the linear power mechanism 123 is installed on the boat body 6 through a support 121, and the output end of the linear power mechanism 123 is fixedly installed with the top of the lifting inner pipe 11, such as an end plate 181, through a locking nut 126, so that the lifting inner pipe 11 moves up and down relative to the fixed pipe 13 through the operation of the linear power mechanism 123, and reliably switches between extension and retraction; a guide support pipe 124 is also symmetrically installed on the outside of the fixed pipe 13, and the guide support pipe 124 is installed on the boat body 6 through a mounting seat 122, a guide inner pipe 125 is slidably installed in the guide support pipe 124 along the length direction, and the top end of the guide inner pipe 125 is fixedly installed with the top of the lifting inner pipe 11, such as the end plate 181, through a locking nut 127, and the sliding direction of the guide inner pipe 125 relative to the guide support pipe 124 is consistent with the power output direction of the linear power mechanism 123, so that the movement of the guide inner pipe 125 relative to the guide support pipe 124 provides a guide action for the movement of the lifting inner pipe 11 relative to the fixed pipe 13.

[0076] In this embodiment, the linear power mechanism 123 can be a cylinder, an oil cylinder, an electric push rod, etc.

[0077] In this embodiment, after the lifting inner pipe 11 is extended relative to the fixed pipe 13, the cooperation between the guide inner pipe 125 and the guide support pipe 124, combined with the linear power mechanism 123, can jointly support and strengthen the overall structure of the lifting inner pipe 11, reducing or even preventing damage to the structure of the lifting inner pipe 11 caused by sea waves, etc.

[0078] As shown in Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, the top of the lifting inner tube 11 is fitted with an end plate 181, and an air inlet 111 is provided through the upper part of the side wall of the lifting inner tube 11. A waterproof rubber 182 is fitted on the outer wall of the lifting inner tube 11 above the air inlet 111, and a waterproof rubber 184 is fitted on the lower part of the outer wall of the lifting inner tube 11. An upper retaining ring 183 is installed on the inner wall of the fixing tube 13 between the waterproof rubber 182 and the waterproof rubber 184. The waterproof rubber 182 is attached to the top surface of the upper retaining ring 183 or the waterproof rubber 184 is attached to the bottom surface of the upper retaining ring 183, forming a sealing component 18.

[0079] In this embodiment, the end plate 181 is used to close the top opening of the lifting inner tube 11 on the one hand, and on the other hand, the end plate 181 is also used to form the installation base between the lifting inner tube 11 and the linear power mechanism 123 and the guide inner tube 125 in the lifting mechanism 12.

[0080] Since the function of the air intake system 10 is to draw in air, when the amphibious vessel is sailing on the surface, by changing the height of the air intake, it can effectively reduce or even prevent the intake of water while ensuring air intake, thereby ensuring the normal operation of the internal combustion engine system 4. At the same time, the fit between the waterproof rubber 184 and the upper retaining ring 183 after the lifting inner tube 11 is extended further ensures the watertightness of the air intake. In the underwater submerged state, the air intake system 10 lowers the lifting inner tube 11, and the end plate 181 at the upper end of the lifting inner tube 11, combined with the fit between the waterproof rubber 182 and the upper retaining ring 183 after the lifting inner tube 11 is lowered, effectively ensures the watertightness of the air intake. Thus, the air intake system 10 achieves bidirectional watertightness in different states of the amphibious vessel, whether on the surface or submerged.

[0081] In this embodiment, a lower retaining ring 185 is fixedly installed below the waterproof rubber 184 on the outer wall of the lifting inner tube 11, which provides structural support for the waterproof rubber 184. In particular, when the waterproof rubber 184 is attached to the upper retaining ring 183, the lower retaining ring 185 effectively ensures the adhesion and watertightness between the waterproof rubber 184 and the upper retaining ring 183.

[0082] Both the upper retaining ring 183 and the lower retaining ring 185 can be ring structures with a rectangular cross-section, and both the waterproof rubber one 182 and the waterproof rubber two 184 can be ring structures with a rectangular cross-section or a circular center.

[0083] The specific usage of the intake system 10 and exhaust system 20 in this invention is as follows:

[0084] For the air intake system 10, when the amphibian is in the surface navigation state, the pump jet propeller 1 is driven to work by the internal combustion engine system 4, in this state, the lifting mechanism 12 drives the lifting inner tube 11 to ascend relative to the fixed tube 13, the external air can enter through the air inlet hole 111 on the lateral upper part of the lifting inner tube 11, enter the pressure-resistant tank body 5 through the fixed tube 13, and be used for the operation of the internal combustion engine system 4; the elevation of the lifting inner tube 11 effectively prevents the entry of external seawater, and the fit between the waterproof rubber II 184 and the upper snap ring 183 on the lifting inner tube 11 effectively ensures the water tightness of the structure; when the amphibian is in the submerged state, the lifting mechanism 12 drives the lifting inner tube 11 to retract into the fixed tube 13, and the fit between the end plate 181 at the end of the lifting inner tube 11 and the upper snap ring 183 combined with the waterproof rubber I 182 after the lifting inner tube 11 is lowered effectively ensures the water tightness of the air intake system 10.

[0085] For the exhaust system 20, the up and down movement of the balance block 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 vehicle is in the water surface navigation state, the internal combustion engine system 4 is in the working state, the exhaust axial flow fan 24 will exhaust the hot exhaust gas in the pressure tank body 5, the exhaust force acting on the exhaust valve 21 will make the exhaust valve 21 turn outward relative to the boat body 6 to be in the open state, and the upper connecting rod 237, the lower connecting rod 238 and the balance block 233 are turned or moved upward, and the hot exhaust gas is smoothly exhausted; When the amphibious vehicle encounters waves during navigation, seawater may enter the exhaust system 20, most of the seawater will flow into the water collecting cylinder 234 through the water collecting hopper 231, and a small part of the seawater will flow into the exhaust pipe 26 through the exhaust hole 2311 of the water collecting hopper 231, and these small parts of seawater can be discharged through the exhaust drain pipe 28 and the exhaust drain valve 27. When the water 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 water gravity will force the balance block 233 to move downward relative to the water collecting cylinder 234, and the upper connecting rod 237 and the lower connecting rod 238 are turned or moved downward, 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 limited value, it indicates that the seawater has affected the normal work of the exhaust system 20. At this time, the corresponding sensor will send the shutdown information to the control system of the internal combustion engine system 4, and control the internal combustion engine system 4 to stop. All the seawater flowing into the water collecting cylinder 234 will be discharged through the exhaust drain pipe 28 and the exhaust drain valve 27. When all the seawater is discharged, the water gravity acting on the balance block 233 disappears, and then the internal combustion engine system 4 can be restarted. With the exhaust force acting on the exhaust valve 21 generated by the exhaust axial flow fan 24 gradually increasing, when the exhaust force is greater than the total weight of all moving parts of the upper connecting rod 237, the lower connecting rod 238, the balance block 233 and the exhaust valve 21, the exhaust valve 21 is gradually opened, and enters the normal exhaust working state.

[0086] The present application effectively solves the problem of wave prevention and water tightness of the engine room of the amphibious vehicle in different navigation states, and greatly guarantees the normal navigation of the amphibious vehicle.

[0087] The above description is an explanation of the present application, not a limitation of the invention, the scope of the present application is defined in the claims, within the protection scope of the present application, any form of modification can be made.

Claims

1. An amphibious vehicle power system air intake and exhaust device, comprising a pressure-resistant tank body (5) arranged inside a vehicle body (6), an internal combustion engine system (4) is installed in the pressure-resistant tank body (5), the internal combustion engine system (4) is power connected with a pump-jet propeller (1) via a universal joint (3), characterized in that: An air inlet system (10) and an air exhaust system (20) are installed in communication with the outside of the hull (6) and the inside of the pressure tank body (5); the structure of the air exhaust system (20) is that: it comprises an exhaust pipe (26), one end of the exhaust pipe (26) is connected to the internal combustion engine system (4) in the pressure tank body (5), and the other end of the exhaust pipe (26) is located at the inner wall of the hull (6) and is provided with an opening vertically upward and outward; a flap (21) is rotatably installed at the outward opening end of the exhaust pipe (26), and a water collecting hopper (231) is installed inside the opening end of the exhaust pipe (26), a water collecting gate control mechanism (23) is installed at the center of the water collecting hopper (231), and when the amount of water collected in the water collecting gate control mechanism (23) exceeds the outward exhaust force received by the flap (21), the flap (21) is closed; The water collecting hopper (231) is a conical structure with a large upper part and a small lower part, the water collecting hopper (231) is provided with an exhaust hole (2311) penetrating up and down, a water collecting cylinder (234) is connected downward and penetrates through the center of the bottom surface of the water collecting hopper (231), a balance block (233) is movably installed in the water collecting cylinder (234), a lower connecting rod (238) extends upward at the center of the top surface of the balance block (233), an upper connecting rod (237) is rotatably installed at the top end of the lower connecting rod (238), and the top end of the upper connecting rod (237) is rotatably installed with the flap (21); the up-and-down movement of the balance block (233) relative to the water collecting cylinder (234) constitutes the water collecting gate control mechanism (23) for controlling the opening and closing switching of the flap (21).

2. An air intake and exhaust system for an amphibious vehicle power system as claimed in claim 1 wherein: The exhaust pipe (26) is arranged in an L-shaped structure inside the hull (6), the end of the horizontal part of the exhaust pipe (26) is connected to the inside of the pressure tank body (5), an exhaust axial flow fan (24) and an exhaust butterfly valve (25) are installed in sequence in the end of the horizontal part of the exhaust pipe (26), the exhaust butterfly valve (25) controls the switching of the exhaust pipe (26), and the exhaust axial flow fan (24) exhausts the exhaust gas of the internal combustion engine system (4) outward through the exhaust pipe (26); a door frame (22) sealingly matched with the flap (21) is installed on the hull (6) at the end of the exhaust pipe (26).

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

4. An exhaust system for an amphibious vehicle power plant as set forth in claim 1, wherein: A retaining ring (232) is arranged on the inner wall surface of the water collecting cylinder (234) above the balance block (233), and the retaining ring (232) limits the upward movement distance of the balance block (233) relative to the water collecting cylinder (234); the water collecting cylinder (234) is supported by a limiting ring (239) through a support rod (2312) at the opening, and the lower connecting rod (238) penetrates upward through the limiting ring (239).

5. An exhaust system for an amphibious vehicle power plant as set forth in claim 1, wherein: The water collecting cylinder (234) is communicated with the water outlet pipe I (235) installed on the wall surface of the water collecting cylinder (234) at the top surface of the balance block (233) when the balance block (233) is located at a low position relative to the water collecting cylinder (234), and the water outlet pipe I (235) is communicated with the exhaust water outlet pipe (28); the water outlet pipe II (236) is installed at the bottom end of the water collecting cylinder (234) and communicated with the exhaust water outlet pipe (28).

6. An exhaust system for an amphibious vehicle power system as defined in claim 1 wherein: The exhaust holes (2311) are arranged on the conical surface of the water collecting bucket (231) at intervals along the circumference, and each exhaust hole (2311) is arranged along the inclined direction of the conical surface and extends towards the inside of the water collecting bucket (231) at the edge to form a flange (2313).

7. An exhaust system for an amphibious vehicle power plant as defined in claim 1 wherein: The air inlet system (10) comprises a fixed pipe (13) arranged in an L-shaped structure in the boat body (6), a lifting inner pipe (11) is installed in the vertical part of the fixed pipe (13), the lifting inner pipe (11) is driven by a lifting mechanism (12) to extend outward or retract upward relative to the boat body (6), and the external air is communicated through the lifting inner pipe (11) and the inside of the fixed pipe (13) in the extended state; the horizontal part of the fixed pipe (13) is communicated with the pressure tank body (5); the sealing assembly (18) is arranged between the lifting inner pipe (11) and the fixed pipe (13), and the sealing assembly (18) seals the space between the lifting inner pipe (11) and the fixed pipe (13) in the retracted or extended state of the lifting inner pipe (11) relative to the fixed pipe (13).

8. An air intake and exhaust system for an amphibious vehicle power system as claimed in claim 7 wherein: The end of the horizontal part of the fixed pipe (13) is sequentially provided with an air inlet axial fan (15) and an air inlet butterfly valve (14), the bottom surface of the horizontal part of the fixed pipe (13) is communicated with an air inlet water outlet pipe (16), and the air inlet water outlet pipe (16) is provided with an air inlet water outlet valve (17) in series.

9. An air intake and exhaust system for an amphibious vehicle power system as defined in claim 7 wherein: The top end of the lifting inner pipe (11) is closed and provided with an end plate (181), the upper part of the side wall of the lifting inner pipe (11) is provided with an air inlet hole (111), the outer wall of the lifting inner pipe (11) above the air inlet hole (111) is sleeved with a waterproof rubber I (182), the lower part of the outer wall of the lifting inner pipe (11) is sleeved with a waterproof rubber II (184), and the inner wall of the fixed pipe (13) between the waterproof rubber I (182) and the waterproof rubber II (184) is provided with an upper clamping ring (183), 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), thereby forming the sealing assembly (18).

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