Anti-corrosion flange for exhaust pipe of automobile

Abstract

The utility model discloses an anticorrosive automobile exhaust pipe flange, including main pipe department and discharging branch pipe, the main pipe department and discharging branch pipe all are fixedly installed with flange seat, and two groups of flange seats are fixed through horizontal bolt, the flange seat is including double lug seat and inner support pipe, the inner support pipe coaxial heart is arranged in double lug seat, and the inner support pipe is integrally formed with double lug seat, the upper and lower two ends of double lug seat still are symmetrically installed with two groups of pipe clamp seat. The anticorrosive automobile exhaust pipe flange of the application has good anticorrosive performance. The setting of protective cover shell can effectively block the corrosion of corrosive substances in the outside world to flange seat and pipe clamp seat, and the design of internal sealing ring and sealing groove can also prevent exhaust leakage and reduce the corrosion of exhaust to flange. Meanwhile, the structural design of the flange makes installation and maintenance more convenient. Pipe clamp seat can rotate flexibly.

Description

Technical Field

[0001] This utility model relates to the field of exhaust pipe flanges, specifically a corrosion-resistant automotive exhaust pipe flange. Background Technology

[0002] The vehicle exhaust emission system is an important component of a car. Its main function is to safely and effectively discharge the exhaust gases produced by engine combustion outside the vehicle. In the entire exhaust emission system, the exhaust pipe flange plays a key role in connecting different pipe components and ensuring the smooth discharge of exhaust gases.

[0003] Traditional automotive exhaust pipe flanges are typically made of ordinary steel. Ordinary steel is highly susceptible to corrosion when exposed to various corrosive substances in automotive exhaust, such as sulfur dioxide, nitrogen oxides, and moisture. Over time, rust, pitting, and even perforation can appear on the flange surface. This not only reduces the structural strength of the flange and affects the stability of its connection, but may also lead to exhaust gas leaks. Exhaust gas leaks not only cause environmental pollution but may also pose a threat to the health of vehicle occupants.

[0004] Furthermore, traditional flanges typically rely solely on planar contact for sealing, and their sealing performance gradually deteriorates after prolonged exposure to the high temperatures and pressures of exhaust gases. Exhaust gas leaks directly corrode the flange's connection points, further accelerating damage. In addition, traditional flanges offer insufficient protection against complex external environments. Rainwater, dust, and chemicals can directly contact the flange surface, accelerating corrosion. This corrosion is particularly pronounced in harsh environments, such as humid coastal areas and heavily polluted industrial zones, severely impacting the long-term stable operation of automotive exhaust emission systems. Utility Model Content

[0005] The purpose of this utility model is to provide a corrosion-resistant automotive exhaust pipe flange, which aims to improve the safety hazards in the structural connection of existing exhaust pipe flanges.

[0006] This utility model is implemented as follows: A corrosion-resistant automotive exhaust pipe flange includes a main pipe and an exhaust sub-pipe. Flange seats are fixedly installed on both the main pipe and the exhaust sub-pipe. Two sets of flange seats are fixed together by transverse bolts. Each flange seat includes a double-ear seat and an inner support tube. The inner support tube is coaxially disposed within the double-ear seat and is integrally formed with the double-ear seat. Two sets of pipe clamp seats are symmetrically installed at the upper and lower ends of the double-ear seat. One end of each pipe clamp seat is rotatably connected to the double-ear seat, and the two sets of pipe clamp seats are fixed together by longitudinal bolts. Two sets of protective covers for the flange seats and pipe clamp seats are also provided on the outer surfaces of the main pipe and the exhaust sub-pipe. The two sets of protective covers are interlocked and fixed together by bolts.

[0007] Preferably, the double-ear seat includes a tube head shell and an outer ear plate for installation with transverse bolts. The outer ear plate is configured as two sets, and the two sets of outer ear plates are symmetrically arranged on both sides of the tube head shell. The outer ear plate is integrally formed with the tube head shell.

[0008] Preferably, a sealing groove is provided on the outer side of the tube head shell, and an internal sealing ring is fitted onto the inner side of the tube head shell, the internal sealing ring being sleeved on the outer side of the inner support tube.

[0009] Preferably, the outer ear plate is provided with a side ear plate for rotating the clamping tube seat, and the side ear plate is integrally formed with the outer ear plate.

[0010] Preferably, the clamping seat includes an arc-shaped clamping plate and a flipping frame, one end of which is fixed to the upper surface of the arc-shaped clamping plate, and the other end of which is rotatably connected to the side ear plate.

[0011] Preferably, horizontal plates are provided at both ends of the arc-shaped clamping plate, and the horizontal plates are provided with strip grooves for longitudinal bolt installation. An arc-shaped inner pad is also fixedly installed on the inner side of the arc-shaped clamping plate.

[0012] Preferably, the protective cover includes a transparent main shell and protective side plates. The protective side plates are installed on both sides of the transparent main shell and are integrally formed with the transparent main shell. Connecting ear plates are also fixedly installed at both ends of the protective side plates.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: The anti-corrosion automotive exhaust pipe flange of this application has excellent anti-corrosion performance. The protective cover effectively blocks external corrosive substances from eroding the flange seat and pipe clamp seat. The design of the internal sealing ring and sealing groove also prevents exhaust gas leakage and reduces exhaust gas corrosion of the flange. At the same time, the structural design of this flange makes installation and maintenance more convenient. The pipe clamp seat can rotate flexibly, the strip groove facilitates bolt adjustment, and the transparent main shell allows for easy observation of the internal situation, all of which reduce the difficulty of operation and time costs for workers. In addition, the flange has high overall structural strength and good connection stability, ensuring the long-term stable operation of the automotive exhaust pipe. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of the overall structure in an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the flange seat and the clamp seat in the embodiment of this utility model.

[0016] Figure 3 This is a perspective view of the flange seat from the left side in an embodiment of this utility model;

[0017] Figure 4 This is a perspective view of the flange seat from the right side in an embodiment of this utility model;

[0018] Figure 5 yes Figure 3 Side view of the device shown;

[0019] Figure 6 This is a perspective view of the clamp seat in an embodiment of this utility model.

[0020] In the diagram: 1. Flange seat; 10. Transverse bolt; 101. Main pipe; 102. Discharge branch pipe; 11. Double ear seat; 111. Pipe head shell; 112. Outer ear plate; 113. Sealing groove; 114. Internal sealing ring; 115. Side ear plate; 12. Inner support pipe; 2. Pipe clamp seat; 20. Longitudinal bolt; 21. Arc-shaped clamp plate; 211. Horizontal plate; 212. Strip groove; 213. Arc-shaped inner gasket; 22. Flip frame; 3. Protective cover; 31. Transparent main shell; 32. Protective side plate; 321. Connecting ear plate. Detailed Implementation

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0023] Reference Figure 1 , Figure 2 and Figure 3A corrosion-resistant automotive exhaust pipe flange includes a main pipe 101 and an exhaust sub-pipe 102. Flange seats 1 are fixedly installed on both the main pipe 101 and the exhaust sub-pipe 102. The two sets of flange seats 1 are fixed together by transverse bolts 10. Each flange seat 1 includes a double-ear seat 11 and an inner support tube 12. The inner support tube 12 is coaxially disposed within the double-ear seat 11 and is integrally formed with the double-ear seat 11. Two sets of clamping seats 2 are symmetrically installed at the upper and lower ends of the double-ear seat 11. One end of the clamping seat 2 is rotatably connected to the double-ear seat 11, and the two sets of clamping seats 2 are fixed together by longitudinal bolts 20. Two sets of protective covers 3 for the flange seats 1 and clamping seats 2 are also provided on the outer surfaces of the main pipe 101 and the exhaust sub-pipe 102. The two sets of protective covers 3 are interlocked and fixed together by bolts. By installing flange seats 1 on the main pipe 101 and the exhaust branch pipe 102, and fixing them with transverse bolts 10, the basic stability of the exhaust pipe connection is ensured. The integrally formed structure of the double-ear seat 11 and the inner support tube 12 enhances the overall strength of the flange seat 1. During installation, the inner support tube 12 can be used to support the inside of the main pipe 101 and the exhaust branch pipe 102, thereby increasing the strength of the pipe body and preventing deformation during pipe connection. The installation of the pipe clamp seat 2 further strengthens the connection between the exhaust pipe and the flange seat 1, preventing the exhaust pipe from loosening during use. The protective cover 3 effectively prevents external dust, moisture, and corrosive substances in the exhaust gas from corroding the flange seat 1 and the pipe clamp seat 2, extending the service life of the flange.

[0024] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5The double-ear seat 11 includes a pipe head shell 111 and outer ear plates 112 for mounting transverse bolts 10. Two sets of outer ear plates 112 are symmetrically arranged on both sides of the pipe head shell 111, and are integrally formed with the pipe head shell 111. Dividing the double-ear seat 11 into a pipe head shell 111 and outer ear plates 112, with the outer ear plates 112 symmetrically arranged on both sides of the pipe head shell 111 and integrally formed, this structural design makes the installation of the transverse bolts 10 more convenient, while also ensuring uniform stress on the flange seat 1 during connection, thus improving connection stability. A sealing groove 113 is provided on the outer surface of the pipe head shell 111, and an internal sealing ring 114 is fitted onto the inner surface of the pipe head shell 111, sleeved on the outer surface of the inner support tube 12. The sealing groove 113 on the outer surface of the pipe head shell 111 can be used with sealing materials such as sealing rings to further enhance the sealing performance of the flange seat 1 connection and prevent exhaust gas leakage. An internal sealing ring 114 is fitted onto the outer side of the inner support pipe 12, facilitating a sealing fit between the head of the main pipe 101 and the exhaust pipe 102. This prevents exhaust gas leakage from the gap between the inner support pipe 12 and the exhaust pipe, improving the overall sealing performance of the exhaust system. A side ear plate 115 is provided on the side of the outer ear plate 112 for the rotatable installation of the clamping seat 2. The side ear plate 115 is integrally formed with the outer ear plate 112. The side ear plate 115 on the side of the outer ear plate 112 provides support for the rotatable installation of the clamping seat 2, allowing it to rotate flexibly and easily open and close during installation and disassembly, thus improving the convenience of installation and maintenance.

[0025] Reference Figure 2 and Figure 6 The pipe clamp 2 includes an arc-shaped clamping plate 21 and a flip frame 22. One end of the flip frame 22 is fixed to the upper surface of the arc-shaped clamping plate 21, and the other end of the flip frame 22 is rotatably connected to the side ear plate 115. The pipe clamp 2 adopts the structure of the arc-shaped clamping plate 21 and the flip frame 22. The flip frame 22 is rotatably connected to the side ear plate 115, so that the arc-shaped clamping plate 21 can rotate around the side ear plate 115, which facilitates the installation of the pipe clamp 2 on the discharge pipe for clamping and fixing. Horizontal plates 211 are provided at both ends of the arc-shaped clamping plate 21. The horizontal plates 211 have slots 212 for installing longitudinal bolts 20. Arc-shaped inner pads 213 are also fixedly installed on the inner side of the arc-shaped clamping plate 21. The slots 212 on the horizontal plates 211 at both ends of the arc-shaped clamping plate 21 facilitate the installation and adjustment of the longitudinal bolts 20, and allow the clamping force of the pipe clamp 2 to be adjusted according to the actual situation. The arc-shaped inner pad 213 can increase the friction between the clamp seat 2 and the discharge pipe, and at the same time, it can also buffer and protect the discharge pipe, preventing the surface of the discharge pipe from being pinched.

[0026] Reference Figure 1The protective housing 3 includes a transparent main housing 31 and protective side plates 32. The protective side plates 32 are installed on both sides of the transparent main housing 31 and are integrally formed with the transparent main housing 31. Connecting lugs 321 are also fixedly installed at both ends of the protective side plates 32. The protective housing 3 adopts an integrally formed structure of transparent main housing 31 and protective side plates 32. The transparent main housing 31 allows personnel to easily observe the working status of flange seat 1 and pipe clamp seat 2 and promptly detect potential problems. The connecting lugs 321 at both ends of the protective side plates 32 facilitate the fastening and fixing of the two sets of protective housing 3, further enhancing the protective effect of the protective housing 3.

[0027] Working Principle: The flange seat 1 can be made of high-strength stainless steel, such as 304 or 316 stainless steel. These materials have good corrosion resistance and mechanical strength, and can withstand pressure and temperature changes during exhaust gas emission. The internal sealing ring 114 is made of high-temperature and corrosion-resistant rubber, such as fluororubber, which can maintain good sealing performance in high-temperature and corrosive environments. The arc-shaped inner gasket 213 can be made of silicone. Silicone has good flexibility and wear resistance, which can increase the friction between the clamp seat and the exhaust pipe, while protecting the surface of the exhaust pipe. The transparent main shell 31 can be made of transparent polycarbonate (PC) material, which has high strength, high transparency, and good weather resistance. The protective side plate 32 can be made of the same material as the transparent main shell or stainless steel to ensure overall protective performance.

[0028] During actual installation, an internal sealing ring 114 is installed in the sealing groove 113 of the pipe head shell 111. Then, the main pipe 101 and the discharge branch pipe 102 are respectively fitted into the corresponding inner support pipes 12 to ensure a tight fit between the pipe and the inner support pipe 12. The two sets of flange seats 1 are fixed together with transverse bolts 10, and the transverse bolts are tightened to ensure a tight fit between the two sets of flange seats. The pipe clamp seat 2 is flipped over so that its arc-shaped clamp plate 21 wraps around the outer side of the pipe. Then, the two sets of pipe clamp seats are fixed together by passing longitudinal bolts 20 through the strip groove 212 on the horizontal plate 211. The tightening degree of the longitudinal bolts 20 is adjusted as needed to ensure that the arc-shaped inner gasket 213 is in close contact with the discharge pipe. Finally, the two sets of protective covers 3 are snapped onto the outer sides of the main pipe 101 and the discharge branch pipe 102, and the two sets of protective covers are fixed together by passing bolts through the connecting ear plate 321.

[0029] During use, regularly observe the working status of flange seat 1 and pipe clamp seat 2 through the transparent main housing 31. If the sealing ring is found to be aged or damaged, replace the sealing ring in time. If the longitudinal bolt 20 or transverse bolt 10 is found to be loose, tighten it in time. If the arc-shaped inner gasket 213 is severely worn, replace the arc-shaped inner gasket 213 in time.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A corrosion-resistant automotive exhaust pipe flange, comprising a main pipe (101) and an exhaust branch pipe (102), wherein flange seats (1) are fixedly installed on both the main pipe (101) and the exhaust branch pipe (102), and the two sets of flange seats (1) are fixed together by transverse bolts (10), characterized in that: The flange seat (1) includes a double-ear seat (11) and an inner support tube (12). The inner support tube (12) is coaxially arranged in the double-ear seat (11) and is integrally formed with the double-ear seat (11). Two sets of clamping seats (2) are symmetrically installed at the upper and lower ends of the double-ear seat (11). One end of the clamping seat (2) is rotatably connected to the double-ear seat (11), and the two sets of clamping seats (2) are fixed together by longitudinal bolts (20). The outer side of the main pipe (101) and the discharge sub-pipe (102) is also provided with two sets of protective covers (3) of the protective flange seat (1) and the clamping seat (2). The two sets of protective covers (3) are fastened to each other and fixed together by bolts.

2. The anti-corrosion automotive exhaust pipe flange according to claim 1, characterized in that, The double ear seat (11) includes a tube head shell (111) and an outer ear plate (112) for mounting a transverse bolt (10). The outer ear plate (112) is configured in two sets, and the two sets of outer ear plates (112) are symmetrically arranged on both sides of the tube head shell (111). The outer ear plate (112) and the tube head shell (111) are integrally formed.

3. The anti-corrosion automotive exhaust pipe flange according to claim 2, characterized in that, A sealing groove (113) is provided on the outer side of the tube head shell (111), and an internal sealing ring (114) is fitted on the inner side of the tube head shell (111). The internal sealing ring (114) is sleeved on the outer side of the inner support tube (12).

4. The anti-corrosion automotive exhaust pipe flange according to claim 3, characterized in that, The outer ear plate (112) is provided with a side ear plate (115) for the clamping tube seat (2) to be rotatably installed. The side ear plate (115) and the outer ear plate (112) are integrally formed.

5. The anti-corrosion automotive exhaust pipe flange according to claim 4, characterized in that, The clamping seat (2) includes an arc-shaped clamping plate (21) and a flipping frame (22). One end of the flipping frame (22) is fixed to the upper surface of the arc-shaped clamping plate (21), and the other end of the flipping frame (22) is rotatably connected to the side ear plate (115).

6. The anti-corrosion automotive exhaust pipe flange according to claim 5, characterized in that, The arc-shaped clamp (21) has horizontal plates (211) at both ends. The horizontal plates (211) have slots (212) for installing longitudinal bolts (20). An arc-shaped inner pad (213) is also fixedly installed on the inner side of the arc-shaped clamp (21).

7. The anti-corrosion automotive exhaust pipe flange according to claim 6, characterized in that, The protective cover (3) includes a transparent main shell (31) and a protective side plate (32). The protective side plate (32) is installed on both sides of the transparent main shell (31) and is integrally formed with the transparent main shell (31). Connecting ear plates (321) are also fixedly installed at both ends of the protective side plate (32).

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