Silencer structure with fireproof function for mine truck

Abstract

The utility model discloses a mine truck silencer structure with a fireproof function, which relates to the technical field of mine truck exhaust systems and is technically characterized by comprising a first silencer outer shell, a second silencer outer shell, a first side plate, a second side plate, a first middle partition plate, a second middle partition plate, a third middle partition plate, an air inlet flue and four fireproof flues. The fireproof core valve is directly integrated in the silencer air outlet smoke pipe and forms an integrated structure with the double outer shells, and meanwhile, the four-channel parallel fireproof flue layout is matched with the middle partition plate to guide uniform airflow distribution; the hidden danger of welding seam breakage caused by airflow bottleneck and tail cantilever type installation when a traditional externally-hung type fireproof cap is closed is thoroughly eliminated, the total circulation sectional area of an exhaust system is increased by four times, the airflow velocity gradient is reduced by 55%, the actually measured exhaust back pressure is reduced by about 38% compared with a traditional structure, and on the premise that the effective sectional area of a fireproof core valve is kept, the service life of the fireproof core valve is prolonged. And the fireproof performance and the exhaust efficiency are synchronously improved.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust systems for mining vehicles, specifically a muffler structure for mining trucks with fireproof function. Background Technology

[0002] According to the current mandatory requirements for environmental protection of commercial vehicle exhaust systems, vehicles must meet the emission standards for solid particulate matter and noise pollution. Special operation vehicles such as mining trucks also need to have fire prevention functions. Therefore, some commercial vehicle exhaust systems adopt a combination design of exhaust pipe, muffler and fireproof cap.

[0003] However, the core valve structure of the fireproof cap significantly obstructs exhaust flow when closed, leading to a substantial increase in exhaust back pressure and severely impacting engine efficiency. Especially for large-displacement engines, it is difficult to find a fireproof cap that meets both the low exhaust back pressure requirements and is suitable for the operating conditions. While adding multiple fireproof caps can reduce back pressure, the cantilevered rear layout not only affects aesthetics but also poses a safety hazard as long-term vibration may cause root weld fracture and failure. Therefore, we propose a novel muffler structure for mining trucks with fireproof functionality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a muffler structure for mining trucks with fireproof function, which solves the problem of the fireproof cap obstructing exhaust when closed, leading to increased exhaust back pressure and affecting engine efficiency. In particular, it is difficult to match low back pressure fireproof caps with large displacement engines, and installing multiple fireproof caps affects aesthetics and poses a safety hazard of weld breakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a silencer structure for mining trucks with fireproof function, comprising a first silencer housing, a second silencer housing, a first side plate, a second side plate, a first middle partition plate, a second middle partition plate, a third middle partition plate, an air intake duct, and four fireproof ducts.

[0006] The fireproof flue includes an exhaust pipe, the inner cavity of which is equipped with a fireproof core valve adapted to the exhaust pipe, and the exhaust end of the exhaust pipe is fixedly installed with an exhaust port adapted to the exhaust pipe.

[0007] Preferably, the first intermediate partition is fixedly installed on the right side of the first side plate, and the first muffler housing is fixedly installed on the right side of the first intermediate partition.

[0008] Preferably, the top of the first muffler housing is provided with an air intake flue mounting groove, and the air intake flue is fixedly installed in the air intake flue mounting groove.

[0009] Preferably, the second intermediate partition is fixedly installed on the right side of the first muffler housing, the second muffler housing is fixedly installed on the right side of the second intermediate partition, the third intermediate partition is fixedly installed on the right side of the second muffler housing, and the second side plate is fixedly installed on the right side of the third intermediate partition.

[0010] Preferably, four exhaust flue slots are provided on the second side plate, the second middle partition plate and the third middle partition plate, and the exhaust flue slots are adapted to exhaust flue pipes, wherein the exhaust flue pipes are fixedly installed in the exhaust flue slots.

[0011] Preferably, the air inlet flue and the four air outlet flues are provided with a number of small holes, wherein the small holes are evenly distributed in a circumferential shape to achieve noise reduction.

[0012] Preferably, the four exhaust pipes are located inside the first silencer housing and the second silencer housing.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By integrating the fireproof core valve directly into the muffler's exhaust pipe, forming a unified structure with the double-shell casing, the problem of a surge in exhaust back pressure caused by the sudden reduction in exhaust cross-sectional area when the traditional fireproof cap's core valve is closed is fundamentally solved. This design makes the fireproof functional component an organic part of the exhaust channel, avoiding the "airflow bottleneck" formed by the external fireproof cap when closed. Actual measurements show that the exhaust back pressure is reduced by approximately 38% compared to the traditional structure, effectively ensuring the engine's power output efficiency under high load conditions.

[0015] 2. By adopting a four-channel parallel fireproof flue layout, coupled with a uniform airflow distribution mechanism guided by a central partition, not only is the risk of weld fracture eliminated in the cantilevered multi-fireproof cap installation at the rear eliminated, but the total flow cross-sectional area of ​​the exhaust system is also increased by four times. This optimization of the flow-dividing rotor in terms of fluid dynamics reduces the airflow velocity gradient in each flue by 55%, significantly reducing the friction loss of the exhaust system while maintaining the effective cross-sectional area of ​​the fireproof core valve, thus achieving a dual improvement in fireproof performance and exhaust efficiency. Attached Figure Description

[0016] Figure 1 This is a complete structural schematic diagram of the present invention;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the exploded structure;

[0018] Figure 3 This utility model Figure 2 Another perspective structural diagram.

[0019] In the picture:

[0020] 1. First silencer housing; 2. Second silencer housing; 3. First side plate; 4. Second side plate; 5. First intermediate partition plate; 6. Second intermediate partition plate; 7. Third intermediate partition plate; 8. Inlet flue; 9. Fireproof flue; 901. Outlet flue; 902. Fireproof core valve; 903. Tail outlet. Detailed Implementation

[0021] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] This utility model provides a technical solution:

[0023] Please see Figures 1-3 A fire-resistant muffler structure for mining trucks includes a first muffler housing 1, a second muffler housing 2, a first side plate 3, a second side plate 4, a first intermediate partition 5, a second intermediate partition 6, a third intermediate partition 7, an inlet flue 8, and four fire-resistant flues 9. Each fire-resistant flue 9 includes an outlet flue 901. The inner cavity of the outlet flue 901 is equipped with a fire-resistant core valve 902 adapted to the outlet flue 901. The exhaust end of the outlet flue 901 is fixedly installed with an exhaust port 903 adapted to the outlet flue 901. Exhaust gas enters the muffler through the inlet flue and then passes through the outlet flue 901. The fire-resistant core valve 902 automatically opens and closes according to temperature to achieve the fire-resistant function and ensure safety. The exhaust port 903 serves as the exhaust gas outlet and, in conjunction with the fire-resistant core valve 902, ensures the system's airtightness. This design plays a crucial role in fire prevention, sealing, and optimizing airflow distribution within the muffler.

[0024] In some embodiments, the first intermediate partition 5 is fixedly installed on the right side of the first side plate 3, and the first muffler housing 1 is fixedly installed on the right side of the first intermediate partition 5.

[0025] In this embodiment, the first intermediate partition 5 is fixedly installed on the right side of the first side plate 3, while the first silencer housing 1 is firmly installed on the right side of the first intermediate partition 5. This ensures the stability of the internal structure of the silencer and the smooth flow of air. Its function is to separate and support the internal components of the silencer, providing an orderly flow path for exhaust gas, thereby enhancing the noise reduction effect and fire resistance.

[0026] In some embodiments, the top of the first muffler housing 1 is provided with an air intake flue mounting groove, and the air intake flue 8 is fixedly installed in the air intake flue mounting groove.

[0027] In this embodiment, the intake flue 8 is fixedly installed in the intake flue mounting slot opened on the top of the first muffler housing 1. The intake flue 8 guides the exhaust gas discharged from the engine into the interior of the muffler. Its function is to ensure that the exhaust gas can enter the muffler smoothly and efficiently, while improving the overall stability and noise reduction performance of the muffler structure.

[0028] In some embodiments, the second intermediate partition 6 is fixedly installed on the right side of the first muffler housing 1, the second muffler housing 2 is fixedly installed on the right side of the second intermediate partition 6, the third intermediate partition 7 is fixedly installed on the right side of the second muffler housing 2, and the second side plate 4 is fixedly installed on the right side of the third intermediate partition 7.

[0029] In this embodiment, the second intermediate partition 6, the second silencer housing 2, the third intermediate partition 7, and the second side plate 4 construct a multi-chamber silencing structure. During operation, these partitions and side plates work together to guide the exhaust gas to flow orderly within the silencer. Their function is to separate the internal space of the silencer, forming multiple independent fireproof flues, optimizing the airflow path, enhancing the silencing effect, and ensuring structural stability.

[0030] In some embodiments, four exhaust flue slots are provided on the second side plate 4, the second intermediate partition plate 6 and the third intermediate partition plate 7. The exhaust flue slots are adapted to the exhaust flue pipe 901, wherein the exhaust flue pipe 901 is fixedly installed in the exhaust flue slot.

[0031] In this embodiment, the second side plate 4, the second intermediate partition plate 6, and the third intermediate partition plate 7 are each designed with four exhaust flue slots adapted to the exhaust flue 901, and the exhaust flue 901 is securely installed in the exhaust flue slots. This design ensures that the exhaust gas can be evenly distributed to the four fireproof flues 9. Its function is to optimize airflow distribution, enhance noise reduction and fireproofing effects, and simultaneously improve the compactness and overall stability of the structure.

[0032] In some embodiments, the inlet flue 8 and the four outlet flues 901 are provided with a number of small holes, wherein the small holes are evenly distributed in a circumferential shape to achieve noise reduction.

[0033] In this embodiment, the intake flue 8 and the four exhaust flues 901 are all uniformly distributed with a number of small holes arranged in a circular pattern. These holes generate eddies and scattering effects on the passing exhaust gas, consuming sound energy and thus achieving a noise reduction effect. This significantly reduces exhaust noise, and the holes also promote the uniform distribution of exhaust gas, further improving noise reduction and fire resistance, and optimizing the overall efficiency of the exhaust system.

[0034] In some embodiments, four exhaust pipes 901 are located inside the first silencer housing 1 and the second silencer housing 2.

[0035] In this embodiment, four exhaust pipes 901 are disposed within the inner cavity formed by the first silencer housing 1 and the second silencer housing 2. Exhaust gas enters from the intake flue 8, undergoes silencing treatment, and is then diverted to the four exhaust pipes 901 for discharge. By increasing the number of exhaust pipes 901 and optimizing the airflow path, the silencing effect is improved, the fire resistance is enhanced, and the compactness and efficiency of the exhaust system are ensured.

[0036] In practical use, the working principle of this utility model is as follows:

[0037] The high-temperature exhaust gas from the engine enters the inner cavity formed by the first muffler housing 1 and the second muffler housing 2 through the exhaust pipe. The exhaust gas first enters the muffler interior through the intake flue 8, where several small holes evenly distributed on the intake flue 8 provide initial silencing and diversion of the exhaust gas. The interior of the muffler is divided into multiple independent fireproof flues 9 by the first side plate 3, the second side plate 4, the first intermediate partition 5, the second intermediate partition 6, and the third intermediate partition 7. Each fireproof flue 9 includes an exhaust pipe 901, a fireproof core valve 902, and a tailpipe 903. The exhaust pipe 901 also has evenly distributed silencing holes to further reduce noise. Under normal operating conditions, the fireproof core valve 902 is open. After entering through the intake flue 8, the exhaust gas is evenly dispersed into the four fireproof flues 9 by the guidance of the first intermediate partition 5, the second intermediate partition 6, and the third intermediate partition 7, and finally discharged through the tailpipes 903. Because the four fireproof flues 9 work in parallel, the cross-sectional area of ​​exhaust gas flow is significantly increased, and the overall exhaust back pressure of the system is reduced, thereby improving engine efficiency and meeting environmental emission requirements.

[0038] When encountering dangerous conditions such as high-temperature sparks or flame splashes, the fireproof core valve 902 automatically closes via temperature sensing or mechanical linkage, preventing the leakage of flames and high-temperature exhaust gases from the exhaust port 903, thus achieving fire prevention. The fireproof core valve 902 is directly integrated inside the exhaust pipe 901, forming a compact integrated structure with the first muffler housing 1 and the second muffler housing 2. This avoids the vibration stress concentration problem caused by the traditional cantilevered fireproof cap and reduces the risk of root weld fracture. In addition, the number of fireproof flues 9 can be flexibly configured according to the engine displacement. For example, using four sets of fireproof flues 9 can optimize the balance between exhaust back pressure and fire prevention performance, make the overall structure more aesthetically pleasing, save installation space, and facilitate the layout of mining vehicles in narrow mine environments.

[0039] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A mine truck silencer structure with fireproof function, comprising a first silencer outer shell, a second silencer outer shell, a first side plate, a second side plate, a first intermediate partition plate, a second intermediate partition plate, a third intermediate partition plate, an air inlet flue and four fireproof flues, characterized in that: The fireproof flue comprises an air outlet flue pipe, the inner cavity of the air outlet flue pipe is provided with a fireproof core valve matched with the air outlet flue pipe, and the exhaust end of the air outlet flue pipe is fixedly provided with an exhaust tail port matched with the air outlet flue pipe.

2. The sound muffler structure with fireproof function for a mine truck according to claim 1, characterized in that: The first intermediate partition plate is fixedly installed on the right side of the first side plate, and the first silencer outer shell is fixedly installed on the right side of the first intermediate partition plate.

3. The sound muffler structure with fireproof function for a mine truck according to claim 1, characterized in that: The top of the first silencer outer shell is provided with an air inlet flue installation slot, and the air inlet flue is fixedly installed in the air inlet flue installation slot.

4. The sound muffler structure with fireproof function for a mine truck according to claim 1, characterized in that: The second intermediate partition plate is fixedly installed on the right side of the first silencer outer shell, the second silencer outer shell is fixedly installed on the right side of the second intermediate partition plate, the third intermediate partition plate is fixedly installed on the right side of the second silencer outer shell, and the second side plate is fixedly installed on the right side of the third intermediate partition plate.

5. The sound muffler structure with fireproof function for a mine truck according to claim 1, characterized in that: The second side plate, the second intermediate partition plate and the third intermediate partition plate are all provided with four air outlet flue slots matched with the air outlet flue pipe, wherein the air outlet flue pipe is fixedly installed in the air outlet flue slot.

6. The sound muffler structure with fireproof function for a mine truck according to claim 1, characterized in that: The air inlet flue and the four air outlet flue pipes are all provided with a plurality of small holes, wherein the small holes are uniformly distributed in a circumferential shape and used for silencing.

7. The sound muffler structure with fireproof function for a mine truck according to claim 1, characterized in that: The four air outlet flue pipes are located in the inner cavities of the first silencer outer shell and the second silencer outer shell.

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