Dumper exhaust device capable of adjusting airflow direction

Abstract

The exhaust device comprises a three-way pipe and a runner pipe, the three-way pipe comprises a transverse pipe, an upper pipe and a lower pipe, the transverse pipe is connected with the runner pipe, the upper pipe abuts against a horn pipe at the bottom of a container, the lower pipe is connected with a silencer of the container, and the other end of the runner pipe is connected with an engine. A first valve plate and a second valve plate are arranged in the three-way pipe, a first adjusting assembly connected with the first valve plate and a second adjusting assembly connected with the second valve plate are arranged outside the three-way pipe, the first valve plate is arranged in the upper pipe close to the transverse pipe opening, and the diameter of the first valve plate and the diameter of the second valve plate are equal to the inner diameter of the upper pipe and the inner diameter of the lower pipe respectively. The pipe type three-way structure is adopted to replace a box body type structure, the valve block completely matched with the pipe diameter and the external adjusting mechanism are arranged in the pipe type three-way structure, high-temperature exhaust is strictly limited in a smooth and continuous flow channel to directionally flow along an ideal path, the inherent problems of airflow diffusion and fluid channeling of the box body structure are solved, and exhaust back pressure and airflow resistance are reduced.

Description

Technical Field

[0001] This invention relates to an exhaust device for dump trucks with adjustable airflow direction, belonging to the field of vehicle exhaust technology. Background Technology

[0002] In the field of dump trucks, cargo box heating devices are one of the key pieces of equipment to ensure the normal operation of vehicles in low-temperature environments. Currently, common systems typically employ a box-type structure to divert and guide exhaust gas. This involves directing engine exhaust to the cargo box floor area via specific piping to achieve the heating function. The core component of this structure is a box-type three-way device made of multiple welded metal plates. The upper and lower exhaust pipes are inserted into this box, and the airflow direction is controlled by the up-and-down movement of valve plates, thereby opening and closing different exhaust outlets.

[0003] However, this type of box-type flow divider structure has significant drawbacks in actual operation. Because the valve plate only closes one side of the air inlet during its vertical movement, and the box still has many structural corners and spare space, when high-temperature exhaust enters the box, it does not flow directly to the target outlet along the ideal path. Instead, it first diffuses and flows within the box, especially forming turbulence and eddies at welded corners and cavity edges. This turbulent flow significantly increases airflow resistance and exhaust back pressure, which in turn has a series of adverse effects on engine operation. Excessive back pressure not only increases the load on the engine's exhaust process, but long-term operation may also affect its power output quality and operational stability, and even pose a potential threat to engine life and reliability. Summary of the Invention

[0004] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides an exhaust device for dump trucks with adjustable airflow direction. By adopting a pipe-type three-way structure instead of the traditional box-type structure, this invention eliminates the inherent airflow diffusion and crossflow problems of the box-type structure.

[0005] Technical Solution: An adjustable airflow exhaust device for a dump truck, comprising a three-way pipe and a flow pipe. The three-way pipe includes a horizontal pipe, an upper pipe, and a lower pipe. The horizontal pipe is connected to the flow pipe. The upper pipe abuts against the horn pipe at the bottom of the cargo box. The lower pipe is connected to the cargo box muffler. The other end of the flow pipe is connected to the engine. A first valve plate and a second valve plate are provided inside the three-way pipe. A first adjusting component connected to the first valve plate and a second adjusting component connected to the second valve plate are provided outside the three-way pipe. The first valve plate is located near the horizontal pipe opening inside the upper pipe. When the first adjusting component controls the first valve plate to be horizontal, the first valve plate closes the upper pipe opening. When the first adjusting component controls the first valve plate to be vertical, the first valve plate opens the upper pipe opening. The second valve plate is located near the horizontal pipe opening inside the lower pipe. When the second adjusting component controls the second valve plate to be horizontal, the second valve plate closes the lower pipe opening. When the second adjusting component controls the second valve plate to be vertical, the second valve plate opens the upper pipe opening. The diameters of the first valve plate and the second valve plate are equal to the inner diameters of the upper pipe and the lower pipe, respectively.

[0006] This invention utilizes a first valve plate and a second valve plate, each with a diameter equal to the pipe diameter, installed within the upper and lower sections of a three-way pipe. Their opening and closing states are precisely controlled by an external adjustment component. Through the precise cooperation of the tubular structure and the valve plates, high-temperature exhaust gas is prevented from diffusing inside the pipe; instead, it is strictly confined within a smooth, continuous flow channel formed by the inner wall of the pipe, flowing directly towards the target outlet along an ideal path. This achieves efficient and low-resistance switching of the exhaust gas flow direction, completely solving the problems of excessive engine back pressure, increased load, performance degradation, and shortened lifespan caused by airflow diffusion and cross-flow in box-type structures.

[0007] In a preferred embodiment, to achieve stable and reliable support and sealing for the rotating shaft, the first adjusting assembly includes a rotating shaft, a control mechanism, a bushing, and an end cap. The rotating shaft extends horizontally through the upper tube, with a bushing fitted on one side of the shaft protruding from the upper tube, and the other side of the shaft installed in the end cap. The end cap is fixedly connected to the outer circular surface of the upper tube, and the end face of the bushing abuts against the outer circular surface of the upper tube. The control mechanism is connected to the end of the rotating shaft near the bushing, and the first valve plate is detachably connected to the outer circular surface of the rotating shaft. The second adjusting assembly has the same structure as the first adjusting assembly.

[0008] By setting a bushing on one side to provide radial support and sealing, and setting an end cap on the other side for axial positioning and sealing, smooth and low-resistance rotation of the rotating shaft is achieved, and high-temperature exhaust gas is effectively prevented from leaking from the shaft hole gap, ensuring the smooth operation of the control mechanism and the airtightness of the entire device.

[0009] In a preferred embodiment, to facilitate the installation and replacement of the valve plate, an installation plane is provided on the outer circular surface of the rotating shaft along the axial direction of the rotating shaft. The length of the installation plane is equal to the diameter of the first valve plate, and the first valve plate is detachably connected to the installation plane by bolts and nuts.

[0010] By creating an mounting surface on the rotating shaft and connecting it with bolts and nuts, a robust and detachable connection between the first valve plate and the rotating shaft is achieved, improving the ease of maintenance of the device.

[0011] In a preferred embodiment, to facilitate manual operation and fix the valve plate state, the control mechanism includes a handle and a limiting part. The handle is located at the end of the rotating shaft near the bushing and abuts against the end face of the bushing. The handle is fixedly connected to the end of the rotating shaft. The limiting part is installed on the outer circular surface of the upper tube. After the handle drives the rotating shaft to rotate, it is detachably connected to the limiting part.

[0012] By incorporating a control mechanism that includes a handle and a limit switch, operators can easily rotate the valve disc and reliably lock it in the open or closed position via the limit switch, preventing accidental movement of the valve disc due to airflow impact.

[0013] In a preferred embodiment, to provide a stable and reliable limiting function, the limiting part includes a first mounting plate, a first nut block, and a second nut block fixedly connected to the outer circular surface of the upper tube. The first mounting plate is provided with a first connecting hole, a first mounting hole, and a second mounting hole. The outer circular surface of the bushing is fixedly connected to the inner surface of the first connecting hole. The first nut block protrudes into the first mounting hole and is fixedly connected thereto. The second nut block protrudes into the second mounting hole and is fixedly connected thereto. The handle is provided with a locking hole. After the handle drives the rotating shaft to rotate, it is sleeved on the first nut block or the second nut block through the locking hole and is detachably connected to the first nut block or the second nut block by bolts.

[0014] By setting the first nut block and the second nut block, and using bolts to connect them with the locking holes on the handle, the handle, i.e. the valve plate, is securely locked in two key positions, horizontal and vertical, ensuring the reliable opening and closing of the airflow passage.

[0015] In a preferred embodiment, to ensure that the valve plate can be precisely adjusted and locked in the fully open or fully closed 90-degree position each time, the straight line between the first connecting hole and the first mounting hole and the straight line between the first connecting hole and the second mounting hole are perpendicular, the handle is parallel or perpendicular to the first valve plate, and the straight-line distance from the first mounting hole to the first connecting hole is equal to the straight-line distance from the second mounting hole to the first connecting hole.

[0016] By setting the line connecting the two mounting holes perpendicular to the axis of the bushing connection hole, the movement path of the handle during rotation is strictly constrained by the mechanical limit formed by the two nut blocks. This not only enables a direct display of the valve plate's opening and closing status, but also ensures through this rigid limiting structure that the rotation angle of the rotating shaft is precisely 90 degrees each time. This avoids problems such as airflow leakage or reduced flow cross-sectional area caused by the valve plate's inaccurate opening and closing angle, ensuring the reliability and consistency of airflow switching.

[0017] In a preferred embodiment, to securely mount the entire exhaust system onto the vehicle frame, a second mounting plate and a third mounting plate are respectively fitted onto the outer circular surfaces of the upper and lower tubes, and the upper and lower tubes are connected to the vehicle frame via the second mounting plate and the third mounting plate, respectively.

[0018] By installing second and third mounting plates on the upper and lower tubes respectively, a rigid connection between the T-tube and the frame is achieved, improving the stability and reliability of the entire device when the vehicle is in motion.

[0019] In a preferred embodiment, to improve the sealing performance of the connection with the horn tube of the cargo box, a connector tube is also included, which is sleeved and fixedly installed on the outer circular surface of the upper tube. The end of the connector tube is an outwardly folded arc shape, and the end of the connector tube abuts against the inner wall of the horn tube at the bottom of the cargo box.

[0020] By setting the connector tube with an outward-folded arc shape at the end, a smoother and tighter fit between the connector tube and the inner wall of the horn tube is achieved, effectively preventing high-temperature exhaust leakage, improving thermal efficiency and reducing environmental pollution.

[0021] In a preferred embodiment, to cushion the impact on the exhaust port when the cargo box falls, a spring is also included, which is sleeved on the outer circular surface of the connector tube. The bottom end of the spring is fixedly connected to the second mounting plate, and the spring is fixedly connected to the outer circular surface of the connector tube.

[0022] By installing a spring on the outside of the connector pipe and fixing it to the mounting plate, the elastic deformation of the spring is used to absorb and mitigate the impact force when the cargo box comes into contact with the connector pipe, thus protecting the connector and pipe from damage.

[0023] In a preferred embodiment, to enhance the adaptability of springs of different sizes and reduce costs, the upper tube includes an adapter tube and a tube body. The bottom end of the adapter tube is fixedly connected to the upper end face of the second mounting plate. The tube body passes through the second mounting plate and is fixedly connected to the second mounting plate. The adapter tube is connected to the tube body. The spring is sleeved and fixedly connected to the outer circular surface of the connector tube.

[0024] By dividing the upper tube into an adapter tube and the tube body, it is possible to match springs of various sizes by replacing adapter tubes of different specifications, thus avoiding the high cost of customizing springs specifically for matching tube diameters.

[0025] Beneficial effects: This invention replaces the traditional box-type structure with a tubular tee structure, and incorporates a valve plate perfectly matched to the pipe diameter and a precise external adjustment mechanism. This ensures that high-temperature exhaust gas is strictly confined within a smooth, continuous flow channel, flowing in a directional manner along an ideal path. This completely eliminates the inherent airflow diffusion and cross-flow problems of the box-type structure, thereby significantly reducing exhaust back pressure and airflow resistance. The optimized rotating shaft support sealing structure, detachable valve plate connection method, and precise control mechanism with mechanical limits improve the reliability, sealing performance, and ease of operation of the valve plate, enhancing the engine's operating load and stability. Simultaneously, the spring-buffered arc-shaped connector pipe structure and modular adapter pipe design effectively improve the sealing performance, impact resistance, and component compatibility with the cargo box connection. This meets the requirements for long-term stable and efficient operation of dump trucks in low-temperature environments. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is an overall assembly drawing of the exhaust device of the present invention; Figure 2 This is a cross-sectional view of the exhaust device assembly of the present invention; Figure 3 This is a cross-sectional view of the exhaust device structure of the present invention; Figure 4 This is an isometric view of the exhaust device of the present invention; Figure 5 This is an exploded view of the exhaust device of the present invention; Figure 6 This is a diagram showing the internal airflow direction of the exhaust device's tubular structure according to the present invention. Figure 7 This is a diagram showing the airflow direction inside the box-type structure of the exhaust device. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] like Figures 1-5 As shown, an adjustable airflow exhaust device for a dump truck includes a three-way pipe 1 and a flow pipe 2. The three-way pipe 1 includes a horizontal pipe 11, an upper pipe 12, and a lower pipe 13. The horizontal pipe 11 is connected to the flow pipe 2. The upper pipe 12 abuts against the horn pipe 3 at the bottom of the cargo box. The lower pipe 13 is connected to the cargo box muffler 103. The other end of the flow pipe 2 is connected to the engine. A first valve plate 4 and a second valve plate 5 are provided inside the three-way pipe 1. A first adjusting assembly 6 connecting the first valve plate 4 and a second adjusting assembly 7 connecting the second valve plate 5 are provided outside the three-way pipe 1. The first valve plate 4 is located inside the upper pipe 12 near the opening of the horizontal pipe 11. The first adjusting assembly 6 controls the first valve plate 4. When valve plate 4 is kept horizontal, the first valve plate 4 closes the upper pipe 12 port, that is, the outer circular surface of the first valve plate 4 abuts against the inner wall of the upper pipe 12 port. When the first adjusting component 6 controls the first valve plate 4 to be kept vertical, the first valve plate 4 opens the upper pipe 12 port. The second valve plate 5 is located near the horizontal pipe 11 port in the lower pipe 13. When the second adjusting component 7 controls the second valve plate 5 to be kept horizontal, the second valve plate 5 closes the lower pipe 13 port, that is, the outer circular surface of the second valve plate 5 abuts against the inner wall of the lower pipe 13 port. When the second adjusting component 7 controls the second valve plate 5 to be kept vertical, the second valve plate 5 opens the upper pipe 12 port. The diameters of the first valve plate 4 and the second valve plate 5 are equal to the inner diameters of the upper pipe 12 and the lower pipe 13, respectively.

[0032] By installing a first valve plate 4 and a second valve plate 5 with the same diameter as the pipe diameter in the upper and lower pipes 13 of the three-way pipe 1, and precisely controlling their opening and closing states by an external adjustment component, the high-temperature exhaust gas cannot diffuse inside the pipe through the precise cooperation of the pipe structure and the valve plates. Instead, it is strictly confined in the smooth and continuous flow channel formed by the inner wall of the pipe, flowing directly to the target outlet along an ideal path. This achieves efficient and low-resistance switching of the exhaust gas flow direction, completely solving the problems of excessive engine back pressure, increased load, performance degradation, and shortened lifespan caused by airflow diffusion and crossflow in the box-type structure.

[0033] To achieve stable and reliable support and sealing for the rotating shaft 61, the first adjusting assembly 6 includes a rotating shaft 61, a control mechanism 62, a bushing 63, and an end cap 64. The rotating shaft 61 extends horizontally through the upper tube 12, with the bushing 63 fitted onto one side of the shaft protruding from the upper tube 12, and the other side of the shaft installed in the end cap 64. The end cap 64 is fixedly connected to the outer circular surface of the upper tube 12, and the end face of the bushing 63 abuts against the outer circular surface of the upper tube 12. The control mechanism 62 is connected to the end of the rotating shaft 61 near the bushing 63. The first valve plate 4 is detachably connected to the outer circular surface of the rotating shaft 61. The second adjusting assembly 7 has the same structure as the first adjusting assembly 6.

[0034] By setting a bushing 63 on one side to provide radial support and sealing, and setting an end cap 64 on the other side for axial positioning and sealing, the rotating shaft 61 can rotate smoothly and with low resistance, and effectively prevent high-temperature exhaust gas from leaking from the shaft hole gap, thus ensuring the smooth operation of the control mechanism 62 and the airtightness of the entire device.

[0035] To facilitate the installation and replacement of the valve plate, an installation plane 611 is provided on the outer circular surface of the rotating shaft 61 along the axial direction of the rotating shaft 61. The length of the installation plane 611 is equal to the diameter of the first valve plate 4. The first valve plate 4 is detachably connected to the installation plane 611 by bolts and nuts.

[0036] By creating an mounting surface 611 on the rotating shaft 61 and connecting it with bolts and nuts, a firm and detachable connection between the first valve plate 4 and the rotating shaft 61 is achieved, improving the ease of maintenance of the device.

[0037] To facilitate manual operation and fix the valve plate state, the control mechanism 62 includes a handle 621 and a limiting part 622. The handle 621 is sleeved on the end of the rotating shaft 61 near the bushing 63 and abuts against the end face of the bushing 63. The handle 621 is fixedly connected to the end of the rotating shaft 61. The limiting part 622 is installed on the outer circular surface of the upper tube 12. After the handle 621 drives the rotating shaft 61 to rotate, it is detachably connected to the limiting part 622.

[0038] By setting up a control mechanism 62 that includes a handle 621 and a limit part 622, the operator can easily rotate the valve plate and reliably lock it in the open or closed position by the limit part 622, preventing the valve plate from moving accidentally due to airflow impact.

[0039] To provide a stable and reliable limiting function, the limiting part 622 includes a first mounting plate 6221, a first nut block 6222, and a second nut block 6223, which are fixedly connected to the outer circular surface of the upper tube 12. The first mounting plate 6221 is provided with a first connecting hole 62211, a first mounting hole 62212, and a second mounting hole 62213. The outer circular surface of the bushing 63 is fixedly connected to the inner surface of the first connecting hole 62211. The first nut block 6222 protrudes into the first mounting hole 62212 and is fixedly connected thereto. The second nut block 6223 protrudes into the second mounting hole 62213 and is fixedly connected thereto. The handle 621 is provided with a locking hole 6211. After the handle 621 drives the rotating shaft 61 to rotate, it is sleeved on the first nut block 6222 or the second nut block 6223 through the locking hole 6211 and is detachably connected to the first nut block 6222 or the second nut block 6223 by bolts.

[0040] By setting the first nut block 6222 and the second nut block 6223, and using bolts to connect them with the locking hole 6211 on the handle 621, the handle 621, i.e. the valve plate, is securely locked in two key positions, horizontal and vertical, ensuring the reliable opening and closing of the airflow passage.

[0041] To ensure that the valve plate can be precisely adjusted and locked in the fully open or fully closed 90-degree position each time, the straight line between the first connecting hole 62211 and the first mounting hole 62212 and the straight line between the first connecting hole 62211 and the second mounting hole 62213 are perpendicular. The handle 621 is parallel or perpendicular to the first valve plate 4. The straight line distance from the first mounting hole 62212 to the first connecting hole 62211 is equal to the straight line distance from the second mounting hole 62213 to the first connecting hole 62211.

[0042] By setting the line connecting the two mounting holes perpendicular to the axis of the connecting hole of the bushing 63, the movement path of the handle 621 during rotation is strictly constrained by the mechanical limit formed by the two nut blocks. This not only enables a direct display of the valve plate's opening and closing status, but also ensures through this rigid limiting structure that the rotation angle of the rotating shaft 61 is precisely 90 degrees each time. This avoids the problem of airflow leakage or reduction of flow cross-sectional area caused by the valve plate's inaccurate opening and closing angle, ensuring the reliability and consistency of airflow switching.

[0043] In order to securely mount the entire exhaust system on the frame, a second mounting plate 8 and a third mounting plate 9 are respectively fitted onto the outer circular surfaces of the upper pipe 12 and the lower pipe 13. The upper pipe 12 and the lower pipe 13 are connected to the frame through the second mounting plate 8 and the third mounting plate 9, respectively.

[0044] By setting the second and third mounting plates 9 on the upper tube 12 and the lower tube 13 respectively, a rigid connection between the three-way tube 1 and the frame is achieved, which improves the stability and reliability of the whole device when the vehicle is in motion.

[0045] To improve the sealing performance of the connection with the horn tube 3 of the cargo box, a connector tube 101 is also included, which is sleeved and fixedly installed on the outer circular surface of the upper tube 12. The end of the connector tube 101 is an outwardly folded arc shape, and the end of the connector tube 101 abuts against the inner wall of the horn tube 3 at the bottom of the cargo box.

[0046] By setting the connector tube 101 with an outward-folded arc shape at the end, a smoother and tighter fit between the connector tube 101 and the inner wall of the horn tube 3 is achieved, which effectively prevents high-temperature exhaust leakage, improves thermal efficiency and reduces environmental pollution.

[0047] To cushion the impact on the exhaust port when the cargo box falls, a spring 102 is also included, which is sleeved on the outer circular surface of the connector tube 101. The bottom end of the spring 102 is fixedly connected to the second mounting plate 8, and the spring 102 is fixedly connected to the outer circular surface of the connector tube 101.

[0048] By installing a spring 102 fixed to the mounting plate on the outside of the connector pipe 101, the elastic deformation of the spring 102 is used to absorb and mitigate the impact force when the cargo box comes into contact with the connector pipe 101, thus protecting the connector and pipe from damage.

[0049] To enhance the adaptability of springs 102 of different sizes and reduce costs, the upper tube 12 includes an adapter tube 121 and a tube body 122. The bottom end of the adapter tube 121 is fixedly connected to the upper end face of the second mounting plate 8. The tube body 122 passes through the second mounting plate 8 and is fixedly connected to the second mounting plate 8. The adapter tube 121 is connected to the tube body 122. The spring 102 is sleeved and fixedly connected to the outer circular surface of the connector tube 101.

[0050] By dividing the upper tube 12 into an adapter tube 121 and a tube body 122, it is possible to match springs 102 of various sizes by replacing the adapter tube 121 of different specifications, thus avoiding the high cost problem of customizing springs 102 specifically for the diameter of the adapter tube 121. Example 1

[0051] To further enhance the connection strength based on the detachable connection, after the first valve plate 4 and the mounting plane 611 are detachably connected by bolts and nuts, the abutment between the first valve plate 4 and the mounting plane 611 is welded. By welding the abutment after the bolt and nut connection, the first valve plate 4 and the rotating shaft 61 become a solid whole, which can better withstand the long-term impact of high-temperature airflow and prevent the connection from loosening. Example 2

[0052] To improve the rigidity of the first mounting plate 6221 and the stability of its connection with the pipeline, the first mounting plate 6221 is an L-shaped bent plate, with its two adjacent sides fixedly connected to the outer circular surface of the upper pipe 12. By designing the first mounting plate 6221 as an L-shaped bent plate and fixing it to both sides of the outer circular surface of the upper pipe 12, a more stable installation of the mounting plate is achieved, providing a more solid support foundation for the limiting function. Example 3

[0053] To effectively address the issue of motion interference between the handle 621 and surrounding components in a specific installation orientation, and to enhance the spatial adaptability of the equipment by providing alternative installation options, a redundant hole 62214 is provided on the first mounting plate 6221. The redundant hole 62214 is perpendicular to the line containing the first mounting hole 62212 and the line containing the second mounting hole 62213. The straight-line distance from the first mounting hole 62212 to the redundant hole 62214 is equal to the straight-line distance from the second mounting hole 62213 to the redundant hole 62214. By creating the redundant hole 62214 on the first mounting plate 6221 in a symmetrical perpendicular direction to the original mounting holes, flexible selection of the installation position of the limit nut block is achieved. When the handle 621 interferes with adjacent components in a certain rotational direction due to frame layout limitations, the operating plane of the handle 621 can be switched to another direction by 90 degrees by installing the nut block in the redundant hole 62214, thus cleverly avoiding the interference area. This not only ensures the normal operation of the valve plate control function, but also greatly improves the adaptability of the exhaust system to different vehicle layouts, without having to change the layout of the entire pipeline to avoid interference.

[0054] like Figure 6 and Figure 7 As shown, Figure 6 In the tubular structure of this invention, the gas flows in an orderly manner and all gas flows along ideal paths. Figure 7In conventional box-type structures, after gas enters the box-type structure, it first diffuses and flows through the box, forming turbulence and eddies at the welded corners and cavity edges. This turbulent flow state leads to a significant increase in airflow resistance and exhaust back pressure, which in turn has a series of adverse effects on engine operation. In contrast, the tubular structure of this invention strictly confines the high-temperature exhaust gas to a smooth and continuous flow channel and directs it along an ideal path, completely eliminating the airflow diffusion and flow problems inherent in box-type structures, thereby significantly reducing exhaust back pressure and airflow resistance.

[0055] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. 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 the invention. Therefore, the invention 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 disclosed herein.

Claims

1. An adjustable airflow exhaust device for a dump truck, comprising a three-way pipe (1) and a flow pipe (2), wherein the three-way pipe (1) comprises a horizontal pipe (11), an upper pipe (12), and a lower pipe (13), the horizontal pipe (11) being connected to the flow pipe (2), the upper pipe (12) abutting against a horn pipe (3) at the bottom of the cargo box, the lower pipe (13) being connected to a cargo box muffler (103), and the other end of the flow pipe (2) being connected to an engine, characterized in that: The three-way pipe (1) is provided with a first valve plate (4) and a second valve plate (5) inside. The three-way pipe (1) is provided with a first adjusting assembly (6) connecting the first valve plate (4) and a second adjusting assembly (7) connecting the second valve plate (5) outside. The first valve plate (4) is located in the upper pipe (12) near the opening of the horizontal pipe (11). When the first adjusting assembly (6) controls the first valve plate (4) to remain horizontal, the first valve plate (4) closes the opening of the upper pipe (12). When the first adjusting assembly (6) controls the first valve plate (4) to remain vertical, ... The first valve plate (4) opens the upper pipe (12) port; the second valve plate (5) is located near the horizontal pipe (11) port inside the lower pipe (13). When the second adjusting component (7) controls the second valve plate (5) to remain horizontal, the second valve plate (5) closes the lower pipe (13) port. When the second adjusting component (7) controls the second valve plate (5) to remain vertical, the second valve plate (5) opens the upper pipe (12) port. The diameters of the first valve plate (4) and the second valve plate (5) are equal to the inner diameters of the upper pipe (12) and the lower pipe (13), respectively.

2. The adjustable airflow exhaust device for dump trucks according to claim 1, characterized in that: The first adjustment component (6) includes a rotating shaft (61), a control mechanism (62), a bushing (63), and an end cap (64). The rotating shaft (61) passes through the upper tube (12) in a horizontal direction. A bushing (63) is fitted on one side of the shaft protruding from the upper tube (12), and the other side of the shaft is installed in the end cap (64). The end cap (64) is fixedly connected to the outer surface of the upper tube (12). The end face of the bushing (63) abuts against the outer surface of the upper tube (12). The control mechanism (62) is connected to the end of the rotating shaft (61) near the bushing (63). The first valve plate (4) is detachably connected to the outer surface of the rotating shaft (61). The second adjustment component (7) has the same structure as the first adjustment component (6).

3. The adjustable airflow exhaust device for dump trucks according to claim 2, characterized in that: An mounting plane (611) is provided on the outer circular surface of the rotating shaft (61) along the axial direction of the rotating shaft (61). The length of the mounting plane (611) is equal to the diameter of the first valve plate (4). The first valve plate (4) is detachably connected to the mounting plane (611) by bolts and nuts.

4. The adjustable airflow exhaust device for dump trucks according to claim 2, characterized in that: The control mechanism (62) includes a handle (621) and a limiting part (622). The handle (621) is sleeved on the end of the rotating shaft (61) near the bushing (63) and abuts against the end face of the bushing (63). The handle (621) is fixedly connected to the end of the rotating shaft (61). The limiting part (622) is installed on the outer circular surface of the upper tube (12). After the handle (621) drives the rotating shaft (61) to rotate, it is detachably connected to the limiting part (622).

5. The adjustable airflow exhaust device for dump trucks according to claim 4, characterized in that: The limiting part (622) includes a first mounting plate (6221), a first nut block (6222), and a second nut block (6223) fixedly connected to the outer circular surface of the upper tube (12). The first mounting plate (6221) is provided with a first connecting hole (62211), a first mounting hole (62212), and a second mounting hole (62213). The outer circular surface of the bushing (63) is fixedly connected to the inner surface of the first connecting hole (62211). The first nut block (6222) protrudes into the first mounting hole (62212) and is fixedly connected thereto. The second nut block (6223) protrudes into the second mounting hole (62213) and is fixedly connected thereto. The handle (621) has a locking hole (6211). After the handle (621) drives the rotating shaft (61) to rotate, it is sleeved on the first nut block (6222) or the second nut block (6223) through the locking hole (6211) and is detachably connected to the first nut block (6222) or the second nut block (6223) by bolts.

6. The adjustable airflow exhaust device for dump trucks according to claim 5, characterized in that: The straight line between the first connecting hole (62211) and the first mounting hole (62212) is perpendicular to the straight line between the first connecting hole (62211) and the second mounting hole (62213). The handle (621) is parallel or perpendicular to the first valve plate (4). The straight line distance from the first mounting hole (62212) to the first connecting hole (62211) is equal to the straight line distance from the second mounting hole (62213) to the first connecting hole (62211).

7. The adjustable airflow exhaust device for dump trucks according to claim 1, characterized in that: It also includes a second mounting plate (8) and a third mounting plate (9) respectively mounted on the outer circular surfaces of the upper tube (12) and the lower tube (13), and the upper tube (12) and the lower tube (13) are connected to the frame through the second mounting plate (8) and the third mounting plate (9) respectively.

8. The adjustable airflow exhaust device for dump trucks according to claim 7, characterized in that: It also includes a connector pipe (101) that is sleeved and fixedly installed on the outer circular surface of the upper pipe (12). The end of the connector pipe (101) is an outwardly folded arc shape, and the end of the connector pipe (101) abuts against the inner wall of the horn pipe (3) at the bottom of the cargo box.

9. The adjustable airflow exhaust device for dump trucks according to claim 8, characterized in that: It also includes a spring (102) sleeved on the outer circular surface of the connector tube (101), the bottom end of the spring (102) being fixedly connected to the second mounting plate (8), and the spring (102) being fixedly connected to the outer circular surface of the connector tube (101).

10. The adjustable airflow exhaust device for dump trucks according to claim 9, characterized in that: The upper tube (12) includes an adapter tube (121) and a tube body (122). The bottom end of the adapter tube (121) is fixedly connected to the upper end face of the second mounting plate (8). The tube body (122) passes through the second mounting plate (8) and is fixedly connected to the second mounting plate (8). The adapter tube (121) is connected to the tube body (122). The spring (102) is sleeved and fixedly connected to the outer circle surface of the connector tube (101).

Images