Explosion-proof engine exhaust pipe
By introducing a retractable length adjustment section and coolant cavity into the exhaust pipe, the length changes and high temperature safety hazards caused by thermal expansion and contraction of traditional water-cooled exhaust pipes are solved, and effective cooling and safety protection are achieved.
Patent Information
- Application Number
- CN202422576482.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-24
AI Technical Summary
Traditional water-cooled exhaust pipes have length changes due to thermal expansion and contraction, which are prone to cracks and leakage at the connections. There are safety hazards in high-temperature exhaust pipes, which affect their service life.
An explosion-proof engine exhaust pipe is designed, adopting a retractable length adjustment section and an internal coolant chamber, combined with the air gap spacer cavity structure, adapting to length changes and effectively cooling and cooling.
It extends the service life of the engine exhaust pipe and engine, improves safety performance, and avoids the dangers caused by leakage and excessive temperature.
Smart Images
Figure CN223177620U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicle engines, and particularly relates to an explosion-proof engine exhaust pipe. Background Art
[0002] During the working process of an engine, a large amount of heat is generated, and the exhaust gas temperature can reach 600 - 800 °C. If the outer surface of the exhaust pipe remains at a high temperature for a long time, it will inevitably affect the service life of itself and nearby components. Therefore, a cooling device is usually installed on the exhaust pipe to cool it down. Currently, the traditional water-cooled exhaust pipe has a cooling water sandwich wrapped around the outside of the exhaust pipe. Although it plays a certain role in cooling, due to the thermal expansion and contraction of the long-distance water-cooled exhaust pipe, its length is extremely likely to change, and cracks will occur due to stress at the connection of the exhaust pipe, resulting in gas or coolant leakage; at the same time, the high-temperature exhaust pipe also has great potential safety hazards. Therefore, it is necessary to develop a new type of exhaust pipe to solve the above problems. Content of the Utility Model
[0003] In order to solve the above problems, the utility model provides an explosion-proof engine exhaust pipe.
[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0005] An explosion-proof engine exhaust pipe includes a water-cooled exhaust pipe main body. A telescopic length adjustment section is provided in the middle of the water-cooled exhaust pipe main body. An exhaust passage is provided inside the water-cooled exhaust pipe main body, and a coolant cavity is provided in the sandwich layer of the water-cooled exhaust pipe main body; an air inlet is provided on the side wall of the water-cooled exhaust pipe main body, and an air outlet is provided at the end.
[0006] Further, intake pipes are respectively provided on the side walls at both ends of the water-cooled exhaust pipe main body. The length adjustment section is arranged in the middle of the water-cooled exhaust pipe main body between the two intake pipes; one end of the water-cooled exhaust pipe main body is blocked, and the other end is provided with an air outlet; the coolant cavities in the side wall sandwich layers of the two intake pipes are communicated with the coolant cavity of the water-cooled exhaust pipe main body, and the inside is communicated with the exhaust passage.
[0007] Further, the water-cooled exhaust pipe main body and the two intake pipes sequentially include a cooling pipe and an outer sleeve from the inside to the outside. A coolant cavity is formed between the cooling pipe and the outer sleeve; coolant inlets are provided on the side walls of the outer sleeves of the two intake pipes, and a coolant outlet is provided on the side wall of the outer sleeve of the water-cooled exhaust pipe main body.
[0008] Further, an outer plug cover is provided at the blocked end of the water-cooled exhaust pipe main body. The periphery of the outer plug cover is fixed to the end of the outer sleeve of the water-cooled exhaust pipe main body; an inner plug cover for blocking the end of the cooling pipe is provided inside the outer plug cover. A coolant cavity is formed between the outer plug cover and the inner plug cover, which is used to communicate with the coolant cavity of the water-cooled exhaust pipe main body.
[0009] Further, an exhaust pipe is also included inside the water-cooled exhaust pipe body between the two intake pipes. Both ends of the exhaust pipe are close to the outlets of the two intake pipes. Both ends of the exhaust pipe are fixedly connected to the inner wall of the cooling pipe through annular sealing plates, and an air gap interval cavity is formed between the exhaust pipe and the cooling pipe; an intake cavity communicating with the internal exhaust passage and the adjacent intake pipe is formed between the inner plug cover and the adjacent annular sealing plate.
[0010] Further, the length adjustment sections in the middle of the exhaust pipe and the cooling pipe are both corrugated pipes, and the length adjustment section in the middle of the outer sleeve pipe is a metal flexible pipe.
[0011] Further, the water-cooled exhaust pipe body, the length adjustment section and the two intake pipes are all made of stainless steel.
[0012] Further, the intake pipe is a bent pipe. An exhaust port connected to the water tank is provided at the top of the intake pipe, a coolant inlet is provided on the side or bottom of the intake pipe, and the coolant outlet is provided on the outer wall of the water-cooled exhaust pipe body close to the air outlet.
[0013] Further, the intake pipe includes an inclined part and a horizontal part, and the inclined part and the horizontal part are in arc transition. A flange is provided at the air inlet of the horizontal part; a connecting flange is provided at the air outlet of the water-cooled exhaust pipe body for connecting to the exhaust pipe line.
[0014] Further, a sensor mounting hole is provided at the top of the outer wall at the other end of the water-cooled exhaust pipe body opposite to the air outlet.
[0015] Compared with the prior art, the technical progress achieved by the present utility model is as follows:
[0016] By installing a telescopic length adjustment section in the middle of the water-cooled exhaust pipe body, the present utility model can adapt to the length change of the water-cooled exhaust pipe body during the exhaust process; by arranging a coolant cavity filled with coolant in the sandwich of the water-cooled exhaust pipe body, the outer walls of the water-cooled exhaust pipe body and the intake pipes can be cooled, avoiding leakage caused by excessive self-temperature of the water-cooled exhaust pipe body and the intake pipes, protecting the nearby components at the same time, and improving the safety performance. Using the present utility model can play a protective role, thereby extending the service life of the engine exhaust pipe and the engine. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.
[0018] In the drawings:
[0019] Figure 1The front view of an explosion-proof engine exhaust pipe provided by an embodiment of the present utility model;
[0020] Figure 2 is Figure 1 the A-A sectional view of the explosion-proof engine exhaust pipe in
[0021] Figure 3 is Figure 1 the B-B sectional view of the explosion-proof engine exhaust pipe in
[0022] In the figure:
[0023] 1 - water-cooled exhaust pipe main body; 2 - length adjustment section; 3 - exhaust passage; 4 - coolant cavity; 5 - air inlet; 6 - air outlet; 7 - intake pipe; 8 - cooling pipe; 9 - outer sleeve; 10 - coolant inlet; 11 - coolant outlet; 12 - outer plug; 13 - inner plug; 14 - exhaust pipe; 15 - annular sealing plate; 16 - air gap spacer cavity; 17 - exhaust port; 18 - flange; 19 - connecting flange; 20 - mounting hole. Specific embodiments
[0024] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present utility model will be described below with reference to the accompanying drawings.
[0025] As Figure 1 , Figure 2 and Figure 3 shown, an explosion-proof engine exhaust pipe includes a water-cooled exhaust pipe main body 1. A telescopic length adjustment section 2 is provided in the middle of the water-cooled exhaust pipe main body 1. An exhaust passage 3 is provided inside the water-cooled exhaust pipe main body 1. A coolant cavity 4 is provided in the interlayer of the water-cooled exhaust pipe main body 1. An air inlet 5 is provided on the side wall of the water-cooled exhaust pipe main body 1, and an air outlet 6 is provided at the end. Among them, intake pipes 7 are respectively provided on the side walls at both ends of the water-cooled exhaust pipe main body 1. The length adjustment section 2 is arranged in the middle of the water-cooled exhaust pipe main body 1 between the two intake pipes 7. One end of the water-cooled exhaust pipe main body 1 is blocked, and the other end is provided with an air outlet 6. The coolant cavities 4 in the side wall interlayers of the two intake pipes 7 are communicated with the coolant cavity 4 of the water-cooled exhaust pipe main body 1, and the interiors are communicated with the exhaust passage 3. Adopting this structure can play a protective role, thereby extending the service life of the engine exhaust pipe and the engine. This solution can adapt to the length change of the water-cooled exhaust pipe main body during the exhaust process by installing a length adjustment section, and at the same time, the outer walls of the water-cooled exhaust pipe main body and the intake pipes are cooled by means of the coolant cavity in the internal interlayer.
[0026] In a specific embodiment of the present utility model, as Figure 2 , 3As shown, the water-cooled exhaust pipe main body 1 and the two intake pipes 7 sequentially include a cooling pipe 8 and an outer sleeve 9 from the inside to the outside, and a coolant cavity 4 is formed between the cooling pipe 8 and the outer sleeve 9; a coolant inlet 10 is provided on the side wall of the outer sleeve of the two intake pipes 7, and a coolant outlet 11 is provided on the side wall of the outer sleeve of the water-cooled exhaust pipe main body 1. Among them, an outer plug 12 is provided at the sealing end of the water-cooled exhaust pipe main body 1, and the periphery of the outer plug 12 is fixed to the end of the outer sleeve of the water-cooled exhaust pipe main body 1; an inner plug 13 for plugging the end of the cooling pipe is provided inside the outer plug 12, and a coolant cavity 4 is formed between the outer plug 12 and the inner plug 13, which is used to communicate with the coolant cavity of the water-cooled exhaust pipe main body 1. With the above structure, the outer sleeve can be cooled by the internal coolant cavity, avoiding the excessive temperature on the outer surface of the engine exhaust pipe, which affects the service life of itself and nearby components, and optimizing the performance of the engine.
[0027] To further optimize the above solution, as Figure 2 shown, inside the water-cooled exhaust pipe main body 1 between the two intake pipes 7, there also includes an exhaust pipe 14. Both ends of the exhaust pipe 14 are close to the outlets of the two intake pipes 7. Both ends of the exhaust pipe 14 are fixedly connected to the inner wall of the cooling pipe 8 through an annular sealing plate 15, and an air gap cavity 16 is formed between the exhaust pipe 14 and the cooling pipe 8; an intake cavity communicating with the internal exhaust passage 3 and the adjacent intake pipe 7 is formed between the inner plug 13 and the adjacent annular sealing plate 15. Through the air gap cavity, excessive heat exchange between the high-temperature gas in the exhaust passage and the coolant in the coolant cavity can be avoided, and while cooling the outer sleeve, the loss of gas flow heat can also be avoided.
[0028] During specific production, the length adjustment sections 2 in the middle of the exhaust pipe 14 and the cooling pipe 8 are both corrugated pipes, and the length adjustment section 2 in the middle of the outer sleeve 9 is a metal flexible pipe. Among them, the water-cooled exhaust pipe main body 1, the length adjustment section 2, and the two intake pipes 7 are all made of stainless steel, and the connection parts of each component are fixed by welding.
[0029] During specific design, according to the space of the engine, the intake pipe 7 is designed as a bent pipe. An exhaust port 17 connected to the water tank is provided at the top of the intake pipe 7, a coolant inlet 10 is provided on the side or bottom of the intake pipe 7, and the coolant outlet 11 is arranged on the outer wall of the water-cooled exhaust pipe main body 1 close to the air outlet 6. As Figure 3 shown, the intake pipe 7 includes an inclined part and a horizontal part, and the inclined part and the horizontal part are in arc transition. A flange 18 is provided at the air inlet 5 of the horizontal part; a connecting flange 19 is provided at the air outlet 6 of the water-cooled exhaust pipe main body 1 for connecting to the exhaust pipe.
[0030] In addition, a sensor mounting hole 20 is provided at the top of the outer wall of the other end of the water-cooled exhaust pipe body 1 opposite to the air outlet 6, which facilitates the installation of a temperature sensor and can timely monitor the temperature change of the coolant.
[0031] In summary, the utility model has the advantages of simple structure, adjustable length, and good cooling effect. By setting a length adjustment section, it can adapt to the length change of the water-cooled exhaust pipe body during the exhaust process, and the outer walls of the water-cooled exhaust pipe body and the intake pipe are cooled by means of the coolant cavity in the sandwich layer; at the same time, an air gap separation cavity is provided between the coolant cavity of the water-cooled exhaust pipe body and the exhaust passage, which can avoid excessive heat exchange between the internal high-temperature gas flow and the coolant, play a role in cooling the outer casing, and also avoid the loss of the heat of the gas flow. The utility model can play a protective role, extend the service life of the engine exhaust pipe and the engine, and improve the safety performance of the engine.
[0032] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the claims of the present utility model.
Claims
1. An explosion-proof engine exhaust pipe, characterized in that: It includes a water-cooled exhaust pipe body. A telescopic length adjustment section is provided in the middle of the water-cooled exhaust pipe body. An exhaust passage is provided inside the water-cooled exhaust pipe body, and a coolant cavity is provided in the sandwich layer of the water-cooled exhaust pipe body. An air inlet is provided on the side wall of the water-cooled exhaust pipe body, and an air outlet is provided at the end. Intake pipes are respectively provided on the side walls at both ends of the water-cooled exhaust pipe body. The length adjustment section is arranged in the middle of the water-cooled exhaust pipe body between the two intake pipes. One end of the water-cooled exhaust pipe body is blocked, and the other end is provided with an air outlet. The coolant cavities in the side wall sandwich layers of the two intake pipes are communicated with the coolant cavity of the water-cooled exhaust pipe body, and the inside is communicated with the exhaust passage. The water-cooled exhaust pipe body and the two intake pipes successively include a cooling pipe and an outer sleeve from the inside to the outside. A coolant cavity is formed between the cooling pipe and the outer sleeve. Coolant inlets are provided on the side walls of the outer sleeves of the two intake pipes, and a coolant outlet is provided on the side wall of the outer sleeve of the water-cooled exhaust pipe body.
2. An explosion-proof engine exhaust pipe according to claim 1, characterized in that: An outer plug cover is provided at the blocked end of the water-cooled exhaust pipe body. The periphery of the outer plug cover is fixed to the end of the outer sleeve of the water-cooled exhaust pipe body. An inner plug cover for blocking the end of the cooling pipe is provided inside the outer plug cover. A coolant cavity is formed between the outer plug cover and the inner plug cover, which is used to communicate with the coolant cavity of the water-cooled exhaust pipe body.
3. An explosion-proof engine exhaust pipe according to claim 2, characterized in that: An exhaust pipe is further included inside the water-cooled exhaust pipe body between the two intake pipes. The two ends of the exhaust pipe are close to the outlets of the two intake pipes. The two ends of the exhaust pipe are fixedly connected to the inner wall of the cooling pipe through annular sealing plates. An air gap separation cavity is formed between the exhaust pipe and the cooling pipe. An intake cavity communicating with the internal exhaust passage and the adjacent intake pipe is formed between the inner plug cover and the adjacent annular sealing plate.
4. An explosion-proof engine exhaust pipe according to claim 3, characterized in that: The length adjustment sections in the middle of the exhaust pipe and the cooling pipe are both corrugated pipes, and the length adjustment section in the middle of the outer sleeve is a metal flexible conduit.
5. An explosion-proof engine exhaust pipe according to claim 4, wherein: The water-cooled exhaust pipe body, the length adjustment section and the two intake pipes are all made of stainless steel.
6. The explosion-proof engine exhaust pipe according to claim 1, wherein: The intake pipe is a bent pipe. An exhaust port connected to a water tank is provided at the top of the intake pipe. A coolant inlet is provided on the side or bottom of the intake pipe. The coolant outlet is provided on the outer wall of the water-cooled exhaust pipe body close to the air outlet.
7. An explosion-proof engine exhaust pipe according to claim 6, characterized in that: The intake pipe includes an inclined portion and a horizontal portion. The inclined portion and the horizontal portion are in arc transition. A flange is provided at the air inlet of the horizontal portion. A connecting flange is provided at the air outlet of the water-cooled exhaust pipe body for connecting to an exhaust pipeline.