Engine underwater exhaust emission structure

Abstract

The present invention discloses an underwater exhaust gas discharge structure for an engine, comprising: a bellows, a flow guide, a plug and a flexible rubber cone sleeve, wherein the front end of the bellows is provided with an air inlet, the rear end is provided with an air outlet, and the middle portion forms a sealed cavity connected with the air inlet and the air outlet, the flow guide is provided in the sealed cavity, and is used to adjust the flow direction of the gas in the sealed cavity, the plug is fixedly connected to the rear end of the bellows, the flexible rubber cone sleeve is sleeved on the outside of the plug, the large end of the flexible rubber cone sleeve is sealed and connected to the rear end of the bellows, and the small end of the flexible rubber cone sleeve is pressed and sleeved on the outer periphery of the plug. The underwater exhaust gas discharge structure for an engine has a reasonable structure, can realize the one-way discharge of the engine exhaust, and can prevent the external water from flowing back into the engine.

Description

Technical Field

[0001] The invention relates to the technical field of underwater engine operation, and in particular provides an underwater tail gas emission structure for an engine. Background Art

[0002] Traditional underwater vehicles and submarines use electricity as the main energy source when operating underwater. The electricity is provided by batteries. When the batteries are exhausted, the fuel engine will charge the batteries. After charging, the mission can be performed. However, fuel engines cannot operate underwater. When charging, the entire ship needs to rise to the surface and then start the fuel engine to charge the batteries. This causes many inconveniences and safety issues in actual operation. In order to realize underwater charging of the engine, the normal exhaust gas discharge of the engine underwater has become a problem that needs to be solved urgently. The traditional solution is to use a tail exhaust with a one-way waterproof end cover structure. When the engine is exhausted, the end cover is opened. However, due to the uneven water pressure and the uneven exhaust pressure, it is impossible to ensure underwater exhaust and water backflow, and thus the reliability of the engine underwater charging operation cannot be guaranteed.

[0003] Therefore, developing a reliable and stable performance underwater exhaust emission structure for the engine to achieve normal exhaust emission of the engine underwater and prevent water from flowing back into the engine has become an urgent problem to be solved. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an underwater exhaust gas emission structure for an engine to solve the exhaust gas emission problem existing in the process of underwater charging of the engine.

[0005] The technical solution provided by the present invention is: an underwater exhaust gas emission structure for an engine, comprising: a bellows, a guide, a plug and a flexible rubber cone sleeve, wherein the front end of the bellows is provided with an air inlet, the rear end is provided with an air outlet, and a sealed cavity connected to the air inlet and the air outlet is formed in the middle, the air inlet is connected to the exhaust pipe of the engine, the guide is arranged in the sealed cavity, and comprises an axial fixing rod and radial guide vanes arranged at intervals along the length direction of the axial fixing rod, and the radial guide vanes are arranged corresponding to the corrugated intervals of the bellows , used to adjust the flow direction of the gas in the sealed cavity to increase the contact area between the gas and the bellows, the plug is fixedly connected to the rear end of the bellows, the flexible rubber cone sleeve is sleeved on the outside of the plug, the large end of the flexible rubber cone sleeve is sealed and connected to the rear end of the bellows, the small end of the flexible rubber cone sleeve is fitted with a compression sleeve on the outer periphery of the plug, the interior of the flexible rubber cone sleeve forms a conical cavity connected to the gas outlet, and the gas in the conical cavity can be squeezed out from the small end of the flexible rubber cone sleeve when the gas reaches a certain pressure.

[0006] Preferably, the rear end of the bellows is sealingly connected to a rear baffle, the air outlet is arranged in the middle of the rear baffle, the plug is coaxially arranged with the bellows, and the front end thereof is fixedly connected to the rear baffle.

[0007] Further preferably, there are multiple air outlets, which are evenly arranged along the circumference of the plug.

[0008] Further preferably, the front of the plug is provided with an axial air outlet, the side of the plug is evenly provided with circumferential air outlets connected with the axial air outlet, and the circumferential air outlets are connected with the conical cavity of the flexible rubber cone sleeve.

[0009] Further preferably, a heat dissipation baffle is provided on the inner side of the rear baffle, and the heat dissipation baffle corresponds to the outer periphery of the last stage of radial guide vanes, so as to further evenly distribute the airflow discharged through the last stage of radial guide vanes.

[0010] Further preferably, the rear portion of the plug is provided with an axial hole communicating with the outside.

[0011] Further preferably, the large end of the flexible rubber cone sleeve is pressed against the rear end of the bellows through a flange seal.

[0012] Further preferably, the front end of the bellows is sealingly connected to a front baffle, the air inlet is arranged in the middle of the front baffle, and the front end of the front baffle is provided with a connecting end for connecting to the exhaust pipe of the engine.

[0013] Further preferably, a spring ring is also arranged outside the small end of the flexible rubber cone sleeve for providing a force for the small end of the flexible rubber cone sleeve to contract toward the plug.

[0014] Further preferably, a protective steel mesh is sleeved on the outside of the corrugated pipe, and water inlet holes are arranged at intervals on the protective steel mesh.

[0015] The underwater exhaust gas discharge structure for an engine provided by the present invention is connected to the exhaust pipe of the engine through the air inlet at the front end of the bellows. After the exhaust gas of the engine enters the bellows, heat is exchanged between the bellows and the water flow outside the bellows, so as to realize cooling of the exhaust gas of the engine, so as to avoid that the high-temperature exhaust gas discharged from the engine causes aging of the flexible rubber cone sleeve at the rear end and causes failure of the one-way underwater exhaust function. The flow guide can adjust the flow direction of the gas in the sealing cavity to increase the contact area between the gas and the bellows and improve the cooling effect on the exhaust gas of the engine. The cooled gas enters the conical cavity through the air outlet. When the gas in the conical cavity reaches a certain pressure, it will be squeezed out from the small end of the flexible rubber cone sleeve. After the gas is discharged, the pressure in the conical cavity is restored, and the flexible rubber cone sleeve will quickly cooperate with the plug column under the action of water pressure and its own elastic force to be pressed to realize sealing, avoid water backflow into the conical cavity, and realize one-way underwater exhaust.

[0016] The underwater exhaust gas discharge structure for an engine provided by the present invention has a reasonable structure, can realize the one-way discharge of the engine exhaust gas, and can prevent external water from flowing back into the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 A cross-sectional view of an underwater exhaust gas discharge structure for an engine provided by the present invention;

[0019] Figure 2 A three-dimensional diagram of the underwater exhaust gas emission structure of an engine provided by the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further explained below in conjunction with specific implementation schemes, but the present invention is not limited thereto.

[0021] In order to solve the problem of poor reliability and easy water backflow in the traditional one-way waterproof end cover structure, Figure 1 , Figure 2 As shown, the present invention provides an underwater exhaust emission structure for an engine, comprising: a bellows 1, a guide member, a plug 3 and a flexible rubber cone sleeve 4, wherein the front end of the bellows 1 is provided with an air inlet 11, the rear end is provided with an air outlet 12, and a sealed cavity connected to the air inlet 11 and the air outlet 12 is formed in the middle, the air inlet 11 is connected to the exhaust pipe of the engine, the guide member is arranged in the sealed cavity, and comprises an axial fixing rod 21 and radial guide vanes 22 arranged at intervals along the length direction of the axial fixing rod 21, and the radial guide vanes 22 are spaced apart from the corrugated area of ​​the bellows 1. The corresponding arrangement is used to adjust the flow direction of the gas in the sealed cavity to increase the contact area between the gas and the bellows 1. The plug 3 is fixedly connected to the rear end of the bellows 1, and the flexible rubber cone sleeve 4 is sleeved on the outside of the plug 3. The large end of the flexible rubber cone sleeve 4 is sealed and connected to the rear end of the bellows 1, and the small end of the flexible rubber cone sleeve 4 is tightly sleeved on the outer periphery of the plug 3. The interior of the flexible rubber cone sleeve 4 forms a conical cavity connected to the air outlet 12. When the gas in the conical cavity reaches a certain pressure, it can be squeezed out from the small end of the flexible rubber cone sleeve 4.

[0022] The engine uses an underwater exhaust gas emission structure, which is connected to the exhaust pipe of the engine through the air inlet at the front end of the bellows. After the exhaust gas of the engine enters the bellows, heat is exchanged between the bellows and the water flow outside the bellows, so as to realize cooling of the exhaust gas of the engine, so as to avoid the high-temperature exhaust gas discharged from the engine causing the aging of the flexible rubber cone sleeve and causing the failure of the one-way underwater exhaust function. The guide piece can adjust the flow direction of the gas in the sealing cavity to increase the contact area between the gas and the bellows and improve the cooling effect on the exhaust gas of the engine. The cooled gas enters the conical cavity through the air outlet. When the gas in the conical cavity reaches a certain pressure, it will be squeezed out from the small end of the flexible rubber cone sleeve. After the gas is discharged, the pressure in the conical cavity is restored. Under the action of water pressure and its own elastic force, the flexible rubber cone sleeve will quickly cooperate with the plug to be pressed to achieve sealing, avoid water backflow into the conical cavity, and realize one-way underwater exhaust.

[0023] As an improvement of the technical solution, Figure 1 As shown, the rear end of the bellows 1 is sealed and connected to a rear baffle 13 , the air outlet 12 is arranged in the middle of the rear baffle 13 , the plug 3 is coaxially arranged with the bellows 1 , and its front end is fixedly connected to the rear baffle 13 .

[0024] As an improvement of the technical solution, Figure 1 As shown, there are multiple air outlets 12 , which are evenly arranged along the circumference of the plug 3 .

[0025] As an improvement of the technical solution, Figure 1 As shown, the front part of the plug 3 is provided with a plug axial air outlet 31, and the side of the plug 3 is evenly provided with plug circumferential air outlets 32 connected with the plug axial air outlet 31 along its circumference, and the plug circumferential air outlet 32 ​​is connected with the conical cavity of the flexible rubber cone sleeve 4. By arranging the air outlet on the plug, the exhaust volume can be increased, the contact area between the gas and the plug is increased, and the cooling effect of the gas can be further improved.

[0026] As an improvement of the technical solution, Figure 1 As shown, a heat dissipation baffle 131 is disposed on the inner side of the rear baffle 13 , and the heat dissipation baffle 131 corresponds to the outer periphery of the last stage radial guide vane 22 , and is used to further evenly distribute the airflow discharged through the last stage radial guide vane 22 .

[0027] As an improvement of the technical solution, Figure 1 As shown, the rear portion of the plug 3 is provided with an axial hole 33 communicating with the outside world. Water entering the axial hole can cool the plug, further improve the heat exchange effect between the plug and the gas in the tapered cavity, and further cool the gas in the tapered cavity.

[0028] As an improvement of the technical solution, Figure 1 , Figure 2As shown, the large end of the flexible rubber cone sleeve 4 is sealed and pressed against the rear end of the bellows 1 through a flange 6 .

[0029] As an improvement of the technical solution, Figure 1 , Figure 2 As shown, the front end of the bellows 1 is sealed and connected to a front baffle 14, the air inlet 11 is arranged in the middle of the front baffle 14, and the front end of the front baffle 14 is provided with a connecting terminal 141 for connecting to the exhaust pipe of the engine. Preferably, the front end of the guide member is fixedly connected to the front baffle, and the air inlet is arranged along the circumference of the guide member.

[0030] As an improvement of the technical solution, Figure 1 , Figure 2 As shown, a spring coil 5 is also arranged outside the small end of the flexible rubber cone sleeve 4, which is used to provide a force for the small end of the flexible rubber cone sleeve 4 to contract toward the plug 3, so as to further realize the rapid closure of the small end of the flexible rubber cone sleeve and prevent water from flowing back into the conical cavity.

[0031] As an improvement of the technical solution, Figure 1 , Figure 2 As shown, a protective steel mesh 7 is sleeved on the outside of the bellows 1, and water inlet holes 71 are arranged at intervals on the protective steel mesh 7. The protective steel mesh can prevent foreign objects such as fish and water plants from adhering to the surface of the bellows and affecting the cooling effect of the gas in the bellows.

[0032] The detailed description of the present invention is written in a progressive manner, emphasizing the differences between the various implementations, and similar parts thereof can be referred to each other.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An underwater exhaust gas emission structure for an engine, characterized in that: include: A bellows (1), a flow guide, a plug (3) and a flexible rubber cone sleeve (4), wherein the front end of the bellows (1) is provided with an air inlet (11), the rear end is provided with an air outlet (12), and the middle portion forms a sealed cavity connected to the air inlet (11) and the air outlet (12), the air inlet (11) is connected to the exhaust pipe of the engine, the flow guide is arranged in the sealed cavity, and comprises an axial fixing rod (21) and radial flow guide plates (22) arranged at intervals along the length direction of the axial fixing rod (21), the radial flow guide plates (22) being arranged corresponding to the corrugated interval of the bellows (1) and being used to adjust the The flow direction of the gas in the sealed cavity is increased to increase the contact area between the gas and the bellows (1); the plug (3) is fixedly connected to the rear end of the bellows (1); the flexible rubber cone sleeve (4) is sleeved on the outside of the plug (3); the large end of the flexible rubber cone sleeve (4) is sealed and connected to the rear end of the bellows (1); the small end of the flexible rubber cone sleeve (4) is fitted and pressed on the outer periphery of the plug (3); the interior of the flexible rubber cone sleeve (4) forms a conical cavity connected to the gas outlet (12); when the gas in the conical cavity reaches a certain pressure, it can be squeezed out from the small end of the flexible rubber cone sleeve (4).

2. The underwater exhaust gas discharge structure for an engine according to claim 1, characterized in that: The rear end of the bellows (1) is sealedly connected to a rear baffle (13), the air outlet (12) is arranged in the middle of the rear baffle (13), the plug (3) is coaxially arranged with the bellows (1), and its front end is fixedly connected to the rear baffle (13).

3. The underwater exhaust gas discharge structure for an engine according to claim 2, characterized in that: There are a plurality of air outlets (12), which are evenly arranged along the circumference of the plug (3).

4. The underwater exhaust gas discharge structure for an engine according to claim 3, characterized in that: The front of the plug (3) is provided with a plug axial air outlet (31), and the side of the plug (3) is evenly provided with plug circumferential air outlets (32) connected to the plug axial air outlet (31) along its circumference, and the plug circumferential air outlets (32) are connected to the conical cavity of the flexible rubber cone sleeve (4).

5. The underwater exhaust gas discharge structure for an engine according to claim 2, characterized in that: A heat dissipation baffle (131) is provided on the inner side of the rear baffle (13), and the heat dissipation baffle (131) corresponds to the outer periphery of the last-stage radial guide vane (22) and is used to further evenly distribute the airflow discharged through the last-stage radial guide vane (22).

6. The underwater exhaust gas discharge structure for an engine according to claim 1, characterized in that: The rear portion of the plug (3) is provided with an axial hole (33) communicating with the outside world.

7. The underwater exhaust gas discharge structure for an engine according to claim 2, characterized in that: The large end of the flexible rubber cone sleeve (4) is sealed and pressed against the rear end of the corrugated pipe (1) via a flange (6).

8. The underwater exhaust gas discharge structure for an engine according to claim 1, characterized in that: The front end of the bellows (1) is sealedly connected to a front baffle (14), the air inlet (11) is arranged in the middle of the front baffle (14), and the front end of the front baffle (14) is provided with a connecting end (141) for connecting to an exhaust pipe of an engine.

9. The underwater exhaust gas discharge structure for an engine according to claim 1, characterized in that: A spring ring (5) is also arranged outside the small end of the flexible rubber cone sleeve (4) for providing a force for the small end of the flexible rubber cone sleeve (4) to contract toward the plug (3).

10. The underwater exhaust gas discharge structure for an engine according to claim 1, characterized in that: A protective steel mesh (7) is sleeved on the outside of the corrugated pipe (1), and water inlet holes (71) are arranged at intervals on the protective steel mesh (7).

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