Special vehicle exhaust device with fixed ends

Abstract

The utility model provides a kind of both ends fixed special vehicle smoke exhaust device, including first smoke pipe welding assembly, first bellow, smoke pipe installation adjustment assembly, second bellow, heat insulating sleeve and second smoke pipe welding assembly, one end of first smoke pipe welding assembly is fixedly installed in engine smoke outlet, and the other end of first smoke pipe welding assembly is connected with first bellow;One end of second smoke pipe welding assembly is fixedly installed on the deck of vehicle body smoke outlet, and the other end of second smoke pipe welding assembly is connected with second bellow;The both ends of smoke pipe installation adjustment assembly are connected with first bellow and second bellow respectively.Smoke pipe installation adjustment assembly is sealed by radial positioning, axial space adjustment and sealing element, can realize the quick installation of smoke exhaust device, avoid the difficulty of sealing and installation of smoke exhaust device due to the space angle of axis existing between two ports fixed, guarantee the loading progress and prevent the security risk of power cabin due to smoke leakage.

Description

Technical Field

[0001] This utility model belongs to the field of special vehicle engineering design technology, specifically relating to a smoke exhaust device for special vehicles with fixed ends. Background Technology

[0002] The exhaust system is one of the most distinctive components of a vehicle engine. Its structural feature is that one end is installed with the engine, while the other end extends through the vehicle's body deck for installation outside the vehicle. For exhaust systems on certain special vehicles where both ends of the engine exhaust port and the vehicle body exhaust port are fixed and sealed, the design of the installation connection structure needs to consider multiple factors such as connection, sealing, heat insulation, vibration reduction, and machining accuracy. Therefore, the installation structure at the junction of the exhaust pipe and the vehicle body deck becomes exceptionally complex, the installation process is cumbersome, quality control is difficult, and maintainability is poor. Installation experience shows that leaks, smoke leaks, and installation difficulties are highly likely to occur at the connection points of the installation pipes. Therefore, it is necessary to design a special vehicle exhaust system with fixed ends to improve installation quality and solve the aforementioned technical problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] This utility model proposes a special vehicle smoke exhaust device with fixed ends to solve the technical problems of high quality control, difficult installation, and poor sealing of the smoke exhaust device installation and connection structure when the smoke exhaust port of the engine and the smoke exhaust port of the vehicle body are fixed at both ends and need to be sealed. This ensures convenient installation of the smoke exhaust device in the research vehicle and prevents smoke leakage in the engine compartment.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model proposes a special vehicle exhaust device with two fixed ends. The special vehicle exhaust device with two fixed ends includes a first exhaust pipe welding assembly, a first corrugated pipe, an exhaust pipe mounting and adjustment assembly, a second corrugated pipe, a heat insulation sleeve, and a second exhaust pipe welding assembly. Among them, one end of the first exhaust pipe welding assembly is fixedly installed on the engine exhaust port, and the other end of the first exhaust pipe welding assembly is connected to the first corrugated pipe. One end of the second exhaust pipe welding assembly is fixedly installed on the exhaust port deck of the vehicle body, and the other end of the second exhaust pipe welding assembly is connected to the second corrugated pipe. The two ends of the exhaust pipe mounting and adjustment assembly are respectively connected to the first corrugated pipe and the second corrugated pipe.

[0007] Furthermore, all pipes in the exhaust system located within the engine compartment are wrapped with heat-insulating sleeves.

[0008] Furthermore, the exhaust pipe installation and adjustment assembly includes a first exhaust stationary pipe, a seal, a mounting ring, a second exhaust stationary pipe, and locking bolts; among which,

[0009] The first exhaust duct is designed with a U-shaped double-layer structure at the connection end with the second exhaust duct; the second exhaust duct has an increased diameter at the connection end with the first exhaust duct, and the connection ends of the first and second exhaust ducts are connected by a nested structure, with the connection end of the second exhaust duct inserted into the double-layer structure of the first exhaust duct.

[0010] The sealing element and the mounting ring are sequentially fitted onto the outer circumference of the connecting end of the second exhaust pipe. Multiple lugs are provided on the outer circumference of the first exhaust pipe and the mounting ring. Multiple locking bolts are inserted into the lugs on the first exhaust pipe and the mounting ring and tightened by spring washers and nuts, thereby fixing the first exhaust pipe, the metal sealing element, the mounting ring and the second exhaust pipe together.

[0011] Furthermore, the distance between the inner and outer layers of the double-layer structure of the first exhaust duct is 1-2 mm greater than the wall thickness of the second exhaust duct.

[0012] Furthermore, the outer edge of the connecting end of the first exhaust duct is locally thickened, and an inclined chamfer is set on the inner edge.

[0013] Furthermore, the diameter of the connecting end of the second exhaust duct is twice the wall thickness of the diameter of the non-connecting end.

[0014] Furthermore, multiple lugs are respectively provided on the outer periphery of the first exhaust static pipe and the mounting dynamic ring by machining or welding.

[0015] Furthermore, the seals are made of metal.

[0016] Furthermore, the metal seals are made of copper.

[0017] (III) Beneficial Effects

[0018] This utility model proposes a special vehicle smoke exhaust device with fixed ends, including a first smoke exhaust pipe welding assembly, a first corrugated pipe, a smoke exhaust pipe installation and adjustment assembly, a second corrugated pipe, a heat insulation sleeve, and a second smoke exhaust pipe welding assembly. One end of the first smoke exhaust pipe welding assembly is fixedly installed at the engine exhaust port, and the other end of the first smoke exhaust pipe welding assembly is connected to the first corrugated pipe. One end of the second smoke exhaust pipe welding assembly is fixedly installed on the vehicle body exhaust port deck, and the other end of the second smoke exhaust pipe welding assembly is connected to the second corrugated pipe. The two ends of the smoke exhaust pipe installation and adjustment assembly are respectively connected to the first corrugated pipe and the second corrugated pipe. The smoke exhaust pipe installation and adjustment assembly enables rapid installation of the smoke exhaust device through radial positioning, axial space adjustment, and sealing, avoiding the difficulty in sealing and installing the smoke exhaust device due to fixed ends and spatial angles on the axis, ensuring the vehicle installation progress and preventing safety hazards caused by smoke leakage in the engine compartment.

[0019] This device aligns the centers of all exhaust pipes in the exhaust pipe installation and adjustment assembly by fitting the first exhaust pipe onto the outer diameter of the second exhaust pipe, facilitating the installation of fasteners at each connection point. When the actual total length of all pipe connections on the research vehicle's exhaust device differs from the designed pipe lengths at both ends, resulting in production errors, the lateral distance of the mounting ring on the exhaust pipe installation and adjustment assembly can be adjusted to reduce the axial length accuracy requirements of the exhaust pipe components, thus enabling successful vehicle installation and ensuring the progress of the vehicle assembly.

[0020] This device uses locking bolts, spring washers, and nuts to fasten the first exhaust static pipe, metal seal, and mounting ring on the exhaust pipe installation and adjustment assembly. The metal seal has advantages such as high temperature resistance, high reliability, and low failure rate, making it suitable for applications with high temperature requirements. Under the pressure of the first exhaust static pipe and the mounting ring, it can seal the gap between the first and second exhaust static pipes to ensure the airtightness of the exhaust device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the special vehicle smoke exhaust device with fixed ends according to this utility model.

[0022] Figure 2 This is an exploded view of the exhaust pipe installation and adjustment assembly in this utility model;

[0023] Figure 3 This is a sectional view of the exhaust pipe installation and adjustment assembly in this utility model. Detailed Implementation

[0024] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0025] This embodiment proposes a special vehicle smoke exhaust device with fixed ends. It is used for the design and installation of smoke exhaust pipe connection structure for special vehicles where the smoke exhaust port of the engine and the smoke exhaust port of the vehicle body are fixed at both ends and need to be sealed. This prevents the smoke exhaust device from being difficult to install and having poor sealing due to the high quality requirements of the axial length of the smoke exhaust pipe. This ensures convenient installation of the smoke exhaust device in the research vehicle and prevents smoke leakage in the engine compartment.

[0026] like Figure 1As shown, this two-terminal fixed special vehicle exhaust system mainly includes a first exhaust pipe welding assembly 1, a first corrugated pipe 2, an exhaust pipe installation and adjustment assembly 3, a second corrugated pipe 4, a heat insulation sleeve 5, and a second exhaust pipe welding assembly 6. One end of the first exhaust pipe welding assembly 1 is fixedly installed at the engine exhaust port, and the other end is connected to the first corrugated pipe 2. One end of the second exhaust pipe welding assembly 6 is fixedly installed on the vehicle body exhaust port deck, and the other end is connected to the second corrugated pipe 4. Both ends of the exhaust pipe installation and adjustment assembly 3 are connected to the first corrugated pipe 2 and the second corrugated pipe 4, respectively. All pipes located within the engine compartment of the exhaust system are wrapped with heat insulation sleeves 5.

[0027] like Figure 2 and 3 As shown, the exhaust pipe installation and adjustment assembly 3 mainly includes a first exhaust static pipe 301, a metal seal 302, an installation rotating ring 303, a second exhaust static pipe 304, a locking bolt 305, a spring washer 306, and a nut 307.

[0028] The first exhaust duct 301 has a U-shaped double-layer structure at its connection end with the second exhaust duct 304, and the distance between the inner and outer layers is 1-2 mm larger than the wall thickness of the second exhaust duct 304 to facilitate the interlocking of the connection ends and the axial positioning of the two ducts. The outer edge of the connection end of the first exhaust duct 301 is locally thickened, and the inner edge is chamfered to ensure the structural strength of the metal seal 302 during sealing and to guarantee the sealing effect.

[0029] The second exhaust pipe 304 has an increased pipe diameter at the connection end with the first exhaust pipe 301, so that the pipe diameter at the connection end is twice the wall thickness of the pipe diameter at the non-connection end and the tolerance is positive.

[0030] The connection ends of the first smoke exhaust duct 301 and the second smoke exhaust duct 304 are connected by a nested structure. The connection end of the second smoke exhaust duct 304 is inserted into the double-layer structure of the first smoke exhaust duct 301 to ensure that the first smoke exhaust duct 301 and the second smoke exhaust duct 304 are aligned axially.

[0031] The metal seal 302 and the mounting ring 303 are sequentially fitted onto the outer periphery of the connecting end of the second exhaust duct 304. Multiple lugs are machined or welded onto the outer periphery of the first exhaust duct 301 and the mounting ring 303. Multiple locking bolts 305 are inserted into the lugs on the first exhaust duct 301 and the mounting ring 303 and tightened using spring washers 306 and nuts 307, thereby fixing the first exhaust duct 301, the metal seal 302, the mounting ring 303, and the second exhaust duct 304 together.

[0032] In this embodiment, the metal seal 302 is made of copper, which has a certain structural strength and good ductility, which is beneficial to the high-temperature sealing at the connection between the first exhaust pipe 301 and the second exhaust pipe 304.

[0033] The working principle of this two-end fixed special vehicle smoke exhaust device is as follows:

[0034] When installing a smoke exhaust system on a large vehicle, due to spatial discrepancies between the actual vehicle body smoke exhaust port and the engine smoke exhaust port, the deformation adjustment of the first bellows 2 and the second bellows 4 is relatively small. This results in a deviation between the total length of each smoke exhaust pipe after installation and the design value in the axial direction of the smoke exhaust system. Additionally, there may be a radial angle at the last connection port, making sealing difficult. By using a double-layer structure, the first smoke exhaust stationary pipe 301 in the smoke exhaust pipe installation adjustment assembly 3 is fitted onto the outer diameter of the second smoke exhaust stationary pipe 304, ensuring that the centers of the first and second smoke exhaust stationary pipes are aligned, guaranteeing axial center alignment at the smoke exhaust pipe connections of the entire smoke exhaust system. Furthermore, the deviation between the total length of each smoke exhaust pipe after installation and the theoretical design value in the axial direction of the smoke exhaust system can be mitigated by adjusting the installation position of the installation ring 303, reducing the axial length accuracy requirements of the smoke exhaust pipe components and facilitating the installation of the smoke exhaust system.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A two-end fixed type special vehicle exhaust device, characterized in that, The dual-fixed special vehicle exhaust system includes a first exhaust pipe welding assembly, a first corrugated pipe, an exhaust pipe installation and adjustment assembly, a second corrugated pipe, a heat insulation sleeve, and a second exhaust pipe welding assembly; wherein... One end of the first exhaust pipe welding assembly is fixedly installed at the engine exhaust port, and the other end of the first exhaust pipe welding assembly is connected to the first corrugated pipe; one end of the second exhaust pipe welding assembly is fixedly installed on the vehicle body exhaust port deck, and the other end of the second exhaust pipe welding assembly is connected to the second corrugated pipe; both ends of the exhaust pipe installation and adjustment assembly are respectively connected to the first corrugated pipe and the second corrugated pipe.

2. The two-end fixed special vehicle exhaust apparatus according to claim 1, wherein, All pipes in the exhaust system located in the engine compartment are wrapped with heat insulation sleeves.

3. The two-end fixed special vehicle exhaust apparatus according to claim 1, wherein, The exhaust pipe installation and adjustment assembly includes a first exhaust stationary pipe, seals, a mounting ring, a second exhaust stationary pipe, and locking bolts; among which, The first exhaust duct is designed with a U-shaped double-layer structure at the connection end with the second exhaust duct; the second exhaust duct has an increased diameter at the connection end with the first exhaust duct, and the connection ends of the first and second exhaust ducts are connected by a nested structure, with the connection end of the second exhaust duct inserted into the double-layer structure of the first exhaust duct. The sealing element and the mounting ring are sequentially fitted onto the outer circumference of the connecting end of the second exhaust pipe. Multiple lugs are provided on the outer circumference of the first exhaust pipe and the mounting ring. Multiple locking bolts are inserted into the lugs on the first exhaust pipe and the mounting ring and tightened by spring washers and nuts, thereby fixing the first exhaust pipe, the metal sealing element, the mounting ring and the second exhaust pipe together.

4. The special vehicle smoke exhaust device fixed at both ends as described in claim 3, characterized in that, The distance between the inner and outer layers of the double-layer structure of the first smoke exhaust duct is 1 to 2 millimeters greater than the wall thickness of the second smoke exhaust duct.

5. The special vehicle smoke exhaust device fixed at both ends as described in claim 3, characterized in that, The outer edge of the connecting end of the first smoke exhaust duct is locally thickened, and an inclined chamfer is provided on the inner edge.

6. The special vehicle smoke exhaust device fixed at both ends as described in claim 3, characterized in that, The diameter of the connecting end of the second smoke exhaust duct is twice the wall thickness of the diameter of the non-connecting end.

7. The special vehicle smoke exhaust device fixed at both ends as described in claim 3, characterized in that, Multiple lugs are provided on the outer periphery of the first exhaust static pipe and the mounting dynamic ring by machining or welding.

8. The special vehicle smoke exhaust device fixed at both ends as described in claim 3, characterized in that, The seal is a metal seal.

9. The special vehicle smoke exhaust device fixed at both ends as described in claim 8, characterized in that, The metal seal is made of copper.

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