Exhaust pipeline integrated with drainage and noise reduction functions

Abstract

The application relates to an exhaust pipeline integrated with a drainage and noise reduction function, and belongs to the technical field of exhaust pipes. The exhaust pipeline integrated with the drainage and noise reduction function comprises a pipe body, a drainage hole, and a noise reduction mechanism. The pipe body is used for exhausting waste gas when an engine works. The drainage hole is arranged on the pipe wall of the pipe body and is used for draining water condensed from water vapor in the pipe body. The noise reduction mechanism is arranged on the drainage hole and communicates with the drainage hole. The noise reduction mechanism is used for noise reduction and synchronous drainage when the drainage hole is not draining water. The application can realize the effects of eliminating the opening whistle sound and air flow howling by bonding the noise reduction ball with the water outlet of the drainage cavity, sealing the water outlet, preventing the airflow generated by waste gas from flowing through the water outlet, firmly sealing the water outlet by the airflow pressing the noise reduction ball, avoiding incomplete sealing, causing noise, eliminating the opening whistle sound caused by the pulse airflow, and improving the comfort of users.

Description

Technical Field

[0001] This application relates to the field of exhaust pipe technology, and in particular to an exhaust pipe with integrated drainage and noise reduction functions. Background Technology

[0002] During the driving process, the car's engine continuously produces high-temperature exhaust gas. This high-temperature exhaust gas is discharged through the exhaust system, which filters and reduces noise. A complete exhaust system includes an exhaust manifold, exhaust pipe, flexible connector (corrugated pipe), three-way catalytic converter, muffler, and exhaust piping. The high-temperature exhaust gas is processed sequentially through the exhaust manifold, exhaust pipe, flexible connector (corrugated pipe), three-way catalytic converter, muffler, and exhaust piping, and finally, low-noise, low-pollution exhaust gas is discharged into the outside environment.

[0003] The exhaust pipe is the device that discharges exhaust gases from the engine. Gasoline contains many chemical components, and additives are often added during the refining process. The exhaust gases discharged from the engine contain some corrosive gases, a large amount of water vapor, carbon dioxide, and other gases. Some of these gases condense into water in the exhaust pipe and remain there. Over time, the water will corrode the exhaust pipe. The water vapor will gradually cool and condense into water as it flows through the exhaust pipe. If the water in the parts is not drained in time, it will cause internal corrosion of the exhaust system, affecting the function and durability of the parts. At the same time, if the temperature is low, the stagnant liquid water will freeze, blocking the pipes and causing poor exhaust. In severe cases, it may even cause the vehicle to stall.

[0004] To solve the above problems and allow condensate to drain from the car's exhaust pipe, a type of exhaust pipe with a drainage function has appeared on the market, such as... Figure 1 and Figure 2 As shown, by opening a drain hole in the exhaust pipe, the condensate in the exhaust pipe is allowed to collect and drip. The drain hole is usually located at the bottom of the end caps at both ends of the muffler or at the lowest point of the pipe. However, when the drain hole is empty or the water flow cannot cover the entire diameter of the drain hole, the airflow passing through the drain hole will produce a whistling sound, resulting in noise and causing discomfort and noise impact to the customer during use. Summary of the Invention

[0005] This application provides an exhaust pipe with integrated drainage and noise reduction functions to solve the problem of noise generated by the water leakage hole of the exhaust pipe in the related art.

[0006] This application provides an exhaust pipe with integrated drainage and noise reduction functions, including...

[0007] Pipe body, the pipe body being used to discharge exhaust gas when the engine is running;

[0008] A drain hole is provided on the pipe wall of the pipe body, and the drain hole is used to discharge water vapor after it condenses into water in the pipe body.

[0009] A noise reduction mechanism is provided on and connected to the drain hole, and the noise reduction mechanism is used to reduce noise when the drain hole is used for drainage and when it is not draining.

[0010] In some embodiments, the silencing mechanism includes a silencing tube and a noise-reducing ball disposed within the silencing tube.

[0011] In some embodiments, the silencer tube is gourd-shaped and has two corresponding cavities inside;

[0012] One end of the silencer pipe has an inlet that is connected to and communicates with the drain hole, and the other end has an outlet.

[0013] In some embodiments, the two cavity structures are a water-guiding cavity connected to the drain hole and a drain cavity communicating with the water-guiding cavity.

[0014] In some embodiments, the water guiding cavity is connected to the water inlet;

[0015] The drainage cavity is connected to the water outlet.

[0016] In some embodiments, the drainage cavity and the water guiding cavity are connected by a water collection channel.

[0017] In some embodiments, the cross-section of the water-conducting cavity is funnel-shaped;

[0018] The diameter of the end of the water-guiding cavity connected to the drain hole is larger than the diameter of the end away from the drain hole.

[0019] In some embodiments, the bottom of the drainage cavity is inclined toward the outlet.

[0020] In some embodiments, the noise-reducing ball is disposed within a drainage cavity;

[0021] The diameter of the noise-reducing ball is larger than the diameter of the water outlet.

[0022] In some embodiments, the height of the noise-reducing sphere is lower than the height of the water collection channel.

[0023] This application provides an exhaust pipe with integrated drainage and noise reduction functions. When a pulsed airflow containing water vapor enters the pipe, condensate will form and collect along the pipe wall in the water-guiding cavity at the lowest point of the pipe. The water-guiding cavity is designed in a funnel shape. Compared with a flat opening, the accumulated water is more likely to enter the drainage cavity due to gravity. The funnel structure of the water-guiding cavity can also effectively solve the problem of condensate accumulating around the drain hole. In addition, the drain hole is also chamfered to make the condensate flow faster and avoid excessive condensate from causing water accumulation and residue around the perimeter.

[0024] When there is enough water in the drainage cavity, the noise-reducing ball rises under the action of buoyancy, and the water outlet leaks out to drain the accumulated water. The noise-reducing ball descends synchronously with the water level. After the water is completely drained, the noise-reducing ball will also fit into the water outlet, sealing it. By fitting the noise-reducing ball into the water outlet of the drainage cavity, the water outlet is sealed, preventing the airflow generated by exhaust gas from flowing through the water outlet. This achieves the effect of eliminating the whistling sound from the opening and the howling sound of airflow. At the same time, the drainage cavity acts as a silencer, buffering the airflow speed and causing the airflow to impact the noise-reducing ball first, thereby reducing the noise generated by the airflow. The airflow also compresses the noise-reducing ball, allowing it to firmly seal the water outlet and avoid incomplete sealing, which would still cause noise. This eliminates the whistling sound from the opening caused by pulsed airflow and improves the user's comfort. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A first structural schematic diagram provided for the prior art;

[0027] Figure 2 A second structural schematic diagram provided for the prior art;

[0028] Figure 3 This is a cross-sectional structural schematic diagram provided for an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure provided for an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the working state provided for an embodiment of this application.

[0031] 1. Pipe body; 2. Drain hole; 3. Silencing pipe; 4. Water guiding cavity; 5. Water collection channel; 6. Water outlet; 7. Noise reduction ball; 8. Water inlet; 9. Drain cavity. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] This application provides an exhaust pipe with integrated drainage and noise reduction functions, which can solve the problem of noise generated by the water leakage hole of the exhaust pipe.

[0034] See Figure 3-5 As shown, this application provides an exhaust pipe with integrated drainage and noise reduction functions, including...

[0035] Pipe 1 is used to discharge exhaust gas when the engine is running.

[0036] Drain hole 2 is opened on the pipe wall of pipe body 1. Drain hole 2 is used to discharge water vapor after it condenses into water in pipe body 1.

[0037] The silencing mechanism is installed on and connected to the drain hole 2. The silencing mechanism is used to reduce noise when the drain hole 2 is draining water or not.

[0038] The exhaust gas produced by the engine is discharged through pipe 1 to prevent the exhaust gas from accumulating inside the vehicle and causing problems. When the exhaust gas is discharged through pipe 1, the water vapor in the exhaust gas will condense into water droplets. A large number of water droplets will accumulate and form condensate, which flows inside pipe 1. The condensate is then drained out through pipe 1 to prevent condensate from accumulating. When the condensate reaches the lowest point of pipe 1, it gathers at the drain hole 2 and is then discharged to the outside through the drain hole 2.

[0039] Drain hole 2 is used to drain condensate. Drain hole 2 is located at the lowest point of the pipe body 1. When the engine exhaust is discharged, the water vapor in the exhaust gas will condense into water droplets when passing through the pipe body 1, and then the water droplets will gather into a water flow and be discharged through drain hole 2.

[0040] The edge of the drain hole 2 is chamfered, so that when the condensate flows into the drain hole 2, the inclined edge of the chamfer can be used to make the condensate flow into the silencer pipe 3 more quickly when it gathers in the drain hole 2. This avoids the flat-mouthed drain hole 2 from accumulating around its edge and the residual condensate not being able to flow into the drain hole 2 by inertia and thus not being able to be discharged.

[0041] The silencing mechanism is installed on and connected to the drain hole 2. When the pipe body 1 drains water through the drain hole 2, the silencing mechanism accelerates the accumulation of condensate and reduces the noise of gas flow through the drain hole 2, making the discharge of condensate smoother. The noise-reducing ball 7 inside the silencing mechanism can float during drainage by using buoyancy, opening the outlet 6 to allow the condensate to drain. During drainage, the noise-reducing ball 7 rises and falls with the water level. When the water level drops, the noise-reducing ball 7 will also drop synchronously with the water level. When the water is completely drained, the noise-reducing ball 7 will also block the outlet 6 to prevent leakage. After the condensate is drained, the airflow will cause a whistling sound. The positive pressure of the airflow through the noise-reducing ball 7 will also make the outlet 6 more stably sealed.

[0042] In some alternative embodiments, see Figure 3-4 As shown, the silencing mechanism includes a silencing pipe 3 and a noise-reducing ball 7 disposed within the silencing pipe 3. The silencing pipe 3 connects the pipe body 1 and the drain hole 2, thus silencing the drain hole 2. The silencing pipe 3 first causes condensate in the pipe body 1 to quickly collect in the internal cavity, and then the noise-reducing ball 7 floats and opens the outlet 6 to discharge it. During the discharge process, the noise-reducing ball 7 inside the silencing pipe 3 automatically opens and closes the outlet 6. When the buoyancy of the water exceeds the weight of the noise-reducing ball 7, noise reduction is achieved. When the noise-reducing ball 7 floats, it opens the outlet 6, allowing condensate to drain through the outlet 6. As the condensate continues to flow out through the outlet 6, the amount of water in the silencer pipe 3 decreases, and the water level continues to drop. The noise-reducing ball 7 then descends again until it reaches the bottom of the silencer pipe 3, sealing the outlet 6. When airflow passes through, it can no longer create a whistling noise through the outlet 6. Thus, the noise-reducing ball 7 enables the silencer pipe 3 to achieve a noise reduction effect.

[0043] The noise-reducing ball 7 is made of a lightweight material controlled by the positive and negative pressure of pulsed airflow. This prevents the water in the silencer pipe 3 from becoming too heavy and losing buoyancy, which would prevent the noise-reducing ball 7 from floating. The outlet 6 is circular, and the noise-reducing ball 7 is spherical. The curved shape of the sphere allows part of the noise-reducing ball 7 to be embedded in the outlet 6, making the seal of the noise-reducing ball 7 on the outlet more complete. This prevents gaps from forming when the noise-reducing ball 7 seals the outlet 6 after it falls, which would allow airflow to pass through and generate noise. Furthermore, when the positive pressure airflow presses on the noise-reducing ball 7, it will make the noise-reducing ball 7 better embedded in the outlet 6 and hold it against the outlet 6, preventing gaps from forming.

[0044] The noise-reducing ball 7 can not only enable the drain pipe 2 to achieve the effect of drainage and noise reduction, but also perform other functions in specific pipes, such as opening and closing the water outlet 6 during daily use.

[0045] The noise reduction and drainage principle of the noise reduction ball 7: The air pressure inside the pipe 1 is set to F, the weight of the noise reduction ball 7 is set to F1, and the buoyancy generated by the noise reduction ball 7 in the water is set to F2. When the pulse airflow blows air through the pipe 1, it is positive pressure, which is in the same direction as the weight of the noise reduction ball 7, and the air pressure F inside the pipe is a positive number; when the pulse airflow does not pass through the pipe 1 to draw in air, it is negative pressure, which is in the opposite direction to the weight of the noise reduction ball 7, and the air pressure F inside the pipe is a negative number.

[0046] When there is no water accumulation in the drainage cavity 9, the principle is as follows:

[0047] 1. When the air pressure F inside the pipe and the weight F1 of the noise-reducing ball 7 are in the same direction or opposite direction, and F < the weight F1 of the noise-reducing ball 7, the noise-reducing ball 7 fits into the outlet 6 of the drainage cavity 9, thus sealing the outlet 6 and eliminating the whistling sound from the opening. At the same time, the drainage cavity 9 acts as a silencer, which buffers the airflow velocity and causes the airflow to impact the noise-reducing ball 7 first, thereby reducing the noise generated by the airflow.

[0048] Second, when the air pressure F inside the pipe and the weight F1 of the noise-reducing ball 7 are in opposite directions or the opposite F is greater than the weight F1 of the noise-reducing ball 7, the noise-reducing ball 7 can also fit with the outlet 6 of the drainage cavity 9, thereby eliminating the whistling sound from the opening.

[0049] The principle is as follows when there is water accumulation in the drainage cavity 9:

[0050] 1. When the air pressure F in the pipe and the buoyancy F2 of the noise reduction ball 7 in the water are greater than the weight F1 of the noise reduction ball 7, the noise reduction ball 7 will be in a floating state. The noise reduction ball 7 will be in contact with the water collection channel 5, and no airflow will pass through the water collection channel 5, thereby eliminating the whistling sound of the opening. At this time, the water in the drainage cavity 9 will be discharged from the outlet 6.

[0051] Then, when there is no water accumulation in the drainage cavity 9, the air pressure F inside the pipe and the gravity F1 of the noise reduction ball 7 will be in opposite directions or the air pressure F inside the pipe will be greater than the gravity F1 of the noise reduction ball 7. The noise reduction ball 7 can also fit with the water outlet 6 of the drainage cavity 9 to eliminate the whistling sound from the opening.

[0052] 2. When the air pressure F in the pipe + the buoyancy F2 of the noise reduction ball 7 in the water < the weight F1 of the noise reduction ball 7, the noise reduction ball 7 is in contact with the water outlet 6 on the drainage cavity 9 or there is water accumulation above the water outlet 6. When there is water accumulation, the water in the drainage cavity 9 is slowly discharged from the water outlet 6 until the noise reduction ball 7 is in contact with the water outlet 6. At this time, no airflow passes through the water outlet, thus eliminating the whistling sound of the opening.

[0053] Then, when there is no water accumulation in the drainage cavity 9, the air pressure F in the pipe and the buoyancy F2 of the noise reduction ball 7 in the water will be greater than the weight F1 of the noise reduction ball 7. The noise reduction ball 7 will be in a floating state. The noise reduction ball 7 will fit with the water collection channel 5, and no airflow will pass through the water collection channel 5, thus eliminating the whistling sound of the opening. At this time, the water in the drainage cavity 9 will be discharged from the outlet 6.

[0054] In this embodiment, the silencer pipe 3 is gourd-shaped and has two corresponding cavities inside. The cavity structure allows condensate to collect through the drain hole 2 and then flow out into the cavity structure for collection and discharge. This avoids the whistling sound caused by a single drain hole 2 accumulating and discharging or the absence of drainage. One end of the silencer pipe 3 has an inlet 8 connected to and communicating with the drain hole 2, and the other end has an outlet 6. The condensate flowing out of the drain hole 2 enters the silencer pipe 3 through the inlet 8 and is then discharged through the outlet 6. The cavity structure provides a buffer time for the condensate to accumulate. The bottom of the silencer pipe 3 is inclined towards the direction of the outlet 6 to prevent the bottom of the flat silencer pipe 3 from having too large an area, which would prevent the condensate from accumulating quickly and causing insufficient condensate to float the noise reduction ball 7 for timely discharge, thus preventing backflow.

[0055] In this embodiment, the water guiding cavity 4 is connected to the water inlet 8, and the drainage cavity 9 is connected to the water outlet 6. After the condensate water accumulates at the drain hole 2 from the pipe body 1, it flows into the water guiding cavity 4 through the water inlet 8, and then flows into the drainage cavity 9 through the water collection channel 5, and is then discharged through the water outlet 6.

[0056] In this embodiment, the drainage cavity 9 and the water guiding cavity 4 are connected by a water collection channel 5. Through the water collection channel 5, the condensate and condensate droplets entering the water guiding cavity 4 can be further collected and converged, so that the cold water condensate can be concentrated and quickly flow into the drainage cavity 9.

[0057] In this embodiment, the cross-section of the water guiding cavity 4 is funnel-shaped, wider at the top and narrower at the bottom. The wider top allows water discharged from the drain hole 2 to be collected over a larger area, while the narrower bottom allows the collected condensate to quickly converge. The funnel structure of the water guiding cavity 4 effectively solves the problem of excessive condensate accumulating around the drain hole 2, which can cause water accumulation. The accumulated water is more easily discharged from the outlet 6, and then the narrower bottom allows the water from the mobile phone to converge and flow into the water collection channel 5, and then into the drain cavity 9.

[0058] In this embodiment, the bottom of the drainage cavity 9 is inclined toward the outlet 6. The inclined bottom allows the condensate collected in the drainage cavity 9 to face the outlet 6, facilitating the discharge of condensate and preventing residual condensate from being discharged in a flat drainage cavity 9. Furthermore, the inclined bottom ensures that the noise reduction ball 7 is always directly above the outlet 6, preventing the noise reduction ball 7 from floating when the bottom is flat.

[0059] In some alternative embodiments, see Figure 3 As shown, the noise reduction ball 7 is placed inside the drainage cavity 9. The diameter of the noise reduction ball 7 is larger than the diameter of the water outlet 6 to prevent the noise reduction ball 7 from falling out of the water outlet 6 and causing the noise reduction to fail.

[0060] In this embodiment, the height of the noise reduction ball 7 is lower than the height of the water collection channel 5 to avoid the noise reduction ball 7 having an excessively large diameter, which would also make it too tall and cause blockage of the water collection channel 5, preventing the condensate from flowing down into the drainage cavity 9.

[0061] In another embodiment of an exhaust pipe with integrated drainage and noise reduction function in this application, the muffler pipe 3 is detachably connected to the pipe body 1.

[0062] The edge of the inlet 8 of the silencer pipe 3 is turned outward to form an outer edge. An extension pipe is welded to the drain hole 2 of the pipe body 1. The edge of the extension pipe away from the drain hole 2 is turned outward to form an outer edge. Bolt holes are opened on the outer edge of the inlet 8 and the outer edge of the extension pipe. The bolt holes on the outer edge of the inlet 8 and the outer edge of the extension pipe can correspond to each other. Then, the silencer pipe 3 is connected and fixed to the drain hole 2 of the pipe body 1 by passing the bolt through the bolt holes, so that the silencer pipe 3 is connected to the pipe body 1. A sealing gasket is also provided between the outer edge of the inlet 8 and the outer edge of the extension pipe. The sealing gasket has holes that correspond to the bolt holes on the outer edge of the inlet 8 and the outer edge of the extension pipe, so that the bolts can pass through and fix them in sequence.

[0063] The silencer pipe 3 includes a water guide pipe, a drain pipe, and a noise reduction ball 7 installed inside. The water guide pipe is funnel-shaped and has a water guide cavity 4 inside. The drain pipe includes an upper pipe and a lower pipe, which are funnel-shaped and form a drain cavity 9 between them. The ends of the upper and lower pipes with larger opening diameters are corresponding and detachably connected. The corresponding edges of the upper and lower pipes are turned outward to form an outer edge. Corresponding bolt holes are opened on the outer edges of the upper and lower pipes. The outer edges of the upper and lower pipes are connected by bolts, and a sealing gasket is also provided between the outer edges of the upper and lower pipes. The sealing gasket has holes corresponding to the bolt holes on the outer edges. A water outlet is opened at the end of the lower pipe away from the upper pipe, and a water collection channel is opened between the upper pipe and the water guide pipe.

[0064] When pipe body 1 is in the exhaust state, water vapor in the exhaust gas will condense into water droplets in pipe body 1. The water droplets will collect to form condensate. Because drain hole 2 is located at the lowest point of pipe body 1, the condensate will accumulate at drain hole 2 and then flow into muffler pipe 3 for discharge. When muffler pipe 3 is not draining, the outlet hole can be sealed by noise reduction ball 7 to prevent airflow and thus prevent whistling noise. After long-term use, impurities in the exhaust gas and condensate will be adsorbed onto the inner wall of muffler pipe 3 and the outer wall of noise reduction ball. Excessive impurities will cause the condensate to accumulate. Afterwards, the channels and holes will become blocked, making drainage less smooth, and the sealing effect of the noise reduction ball on the water outlet will also weaken, resulting in noise. The silencer pipe 3 is detachably connected to the extension pipe on the water inlet, so the silencer pipe 3 can be removed to clean the inner wall of the water guide pipe. The detachable connection between the upper and lower pipes in the drain pipe makes it easy to separate the drain pipe for cleaning the inner wall. It also makes it easy to remove the noise reduction ball 7 for cleaning, avoiding damage to the noise reduction ball 7 after long-term use, or the adhesion of impurities, which changes its sealing effect and weight, causing noise to continue to be generated, thus improving the life of the device.

[0065] In another embodiment of an exhaust pipe with integrated drainage and noise reduction functions, the silencing mechanism includes a silencing pipe in a downward spiral shape. This spiral shape prevents the airflow impact from directly hitting the outlet during exhaust. The airflow first passes through the spiral pipe structure, slowing it down and continuously consuming its impact potential energy. This reduces the airflow's speed and potential energy. When the airflow flows through the outlet, it has less impact potential energy, preventing it from generating a whistling sound. Furthermore, the downward spiral shape of the silencing pipe allows water vapor in the exhaust gas to condense into condensate, which then flows out quickly due to downward inertia. This avoids the blockage caused by horizontal pipes preventing the condensate from generating downward flow inertia.

[0066] In another embodiment of the exhaust pipe with integrated drainage and noise reduction function of this application, the noise reduction ball 7 can also be of any shape, so that the water outlet 6 is a shape that matches the shape of the noise reduction ball 7 and can seal it, such as a square noise reduction ball 7 and a square water outlet 6. The bottom of the drainage cavity 9 is flat, so that the water outlet 6 is located on the plane, which makes it easy for the square noise reduction ball 7 to fit completely with the bottom, avoiding gaps after the curved bottom fits, so that it can directly cover the water outlet 6, which is easy to seal. Four matrix-shaped structures are arranged at the bottom of the drainage cavity 9 and around the water outlet 6. The guide rods are arranged in a row, and the square noise-reducing ball 7 is set in the area enclosed by the four guide rods. The noise-reducing ball 7 is tangent to the guide rods, so that the guide rods fit against the side wall of the noise-reducing ball 7. This prevents the square noise-reducing ball 7 from shaking and failing to align with the outlet 6 for sealing. If the noise-reducing ball 7 is of other shapes, the same principle applies. A guide rod tangent to its outer side is set on its outer side so that the shape of the outlet 6 matches that of the noise-reducing ball 7. Alternatively, if the outlet 6 is round, the bottom of the noise-reducing ball 7 can be conical. It can be directly inserted into the outlet 6, so that it can also open and close the outlet 6 through buoyancy, thereby reducing the howling noise.

[0067] The working principle and process of this application:

[0068] A pulsed airflow containing water vapor enters the pipe body 1, forming condensate. The condensate collects along the pipe wall at the lowest point of the pipe, at the drain hole 2, and then flows through the drain hole 2 into the water guiding cavity 4. The water guiding cavity 4 is funnel-shaped. Compared with a flat opening, the accumulated water is more likely to enter the drain cavity 9 due to gravity, causing it to collect and drain. When there is enough water, the noise reduction ball 7 rises under the action of buoyancy, and the accumulated water is discharged.

[0069] The working principle of noise reduction ball 7: The air pressure inside the tube 1 is F, the weight of noise reduction ball 7 is F1, and the buoyancy generated by noise reduction ball 7 in water is F2.

[0070] When there is no water accumulation in the drainage cavity 9, the principle is as follows:

[0071] 1. When the air pressure F inside the pipe and the weight F1 of the noise-reducing ball 7 are in the same direction or opposite direction, and F < the weight F1 of the noise-reducing ball 7, the noise-reducing ball 7 fits into the outlet 6 of the drainage cavity 9, thus sealing the outlet 6 and eliminating the whistling sound from the opening. At the same time, the drainage cavity 9 acts as a silencer, which buffers the airflow velocity and causes the airflow to impact the noise-reducing ball 7 first, thereby reducing the noise generated by the airflow.

[0072] Second, when the air pressure F inside the pipe and the weight F1 of the noise-reducing ball 7 are in opposite directions or the opposite F is greater than the weight F1 of the noise-reducing ball 7, the noise-reducing ball 7 can also fit with the outlet 6 of the drainage cavity 9, thereby eliminating the whistling sound from the opening.

[0073] The principle is as follows when there is water accumulation in the drainage cavity 9:

[0074] 1. When the air pressure F in the pipe and the buoyancy F2 of the noise reduction ball 7 in the water are greater than the weight F1 of the noise reduction ball 7, the noise reduction ball 7 will be in a floating state. The noise reduction ball 7 will be in contact with the water collection channel 5, and no airflow will pass through the water collection channel 5, thereby eliminating the whistling sound of the opening. At this time, the water in the drainage cavity 9 will be discharged from the outlet 6.

[0075] Then, when there is no water accumulation in the drainage cavity 9, the air pressure F inside the pipe and the gravity F1 of the noise reduction ball 7 will be in opposite directions or the air pressure F inside the pipe will be greater than the gravity F1 of the noise reduction ball 7. The noise reduction ball 7 can also fit with the water outlet 6 of the drainage cavity 9 to eliminate the whistling sound from the opening.

[0076] 2. When the air pressure F in the pipe + the buoyancy F2 of the noise reduction ball 7 in the water < the weight F1 of the noise reduction ball 7, the noise reduction ball 7 is in contact with the water outlet 6 on the drainage cavity 9 or there is water accumulation above the water outlet 6. When there is water accumulation, the water in the drainage cavity 9 is slowly discharged from the water outlet 6 until the noise reduction ball 7 is in contact with the water outlet 6. At this time, no airflow passes through the water outlet, thus eliminating the whistling sound of the opening.

[0077] Then, when there is no water accumulation in the drainage cavity 9, the air pressure F in the pipe and the buoyancy F2 of the noise reduction ball 7 in the water will be greater than the weight F1 of the noise reduction ball 7. The noise reduction ball 7 will be in a floating state. The noise reduction ball 7 will fit with the water collection channel 5, and no airflow will pass through the water collection channel 5, thus eliminating the whistling sound of the opening. At this time, the water in the drainage cavity 9 will be discharged from the outlet 6.

[0078] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0079] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0080] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An exhaust line integrated with a drain noise reduction function, characterized by, The utility model relates to an exhaust pipe with integrated drainage and noise reduction functions, which comprises: a pipe body (1) for discharging exhaust gas during engine operation; a drainage hole (2) formed in the pipe wall of the pipe body (1) and used for discharging water condensed from water vapor in the pipe body (1); a noise reduction mechanism arranged on the drainage hole (2) and in communication with the drainage hole (2), and used for reducing noise when the drainage hole (2) is used for drainage or not used for drainage; the noise reduction mechanism comprises a noise reduction pipe (3) and a noise reduction ball (7) arranged in the noise reduction pipe (3); the noise reduction pipe (3) is in the shape of a gourd and has two cavity structures corresponding to each other in the inside; one end of the noise reduction pipe (3) is provided with a water inlet (8) connected and communicated with the drainage hole (2), and the other end is provided with a water outlet (6); the two cavity structures are a water guide cavity (4) connected with the drainage hole (2) and a drainage cavity (9) communicated with the water guide cavity (4); the drainage cavity (9) and the water guide cavity (4) are communicated through a water collecting channel (5); the cross section of the water guide cavity (4) is in the shape of a funnel; the diameter of one end of the water guide cavity (4) connected with the drainage hole (2) is greater than the diameter of the other end away from the drainage hole (2); the bottom of the drainage cavity (9) is inclined toward the water outlet (6).

2. The exhaust pipe with integrated drainage and noise reduction functions according to claim 1, characterized in that: the water guide cavity (4) is communicated with the water inlet (8); the drainage cavity (9) is communicated with the water outlet (6).

3. The exhaust pipe with integrated drainage and noise reduction functions according to claim 1, characterized in that: the noise reduction ball (7) is arranged in the drainage cavity (9); the diameter of the noise reduction ball (7) is greater than the diameter of the water outlet (6).

4. The exhaust pipe with integrated drainage and noise reduction functions according to claim 3, characterized in that: the height of the noise reduction ball (7) is lower than the height of the water collecting channel (5).

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