Automatic detection equipment for size of exhaust pipe

Abstract

The invention relates to the technical field of exhaust pipe detection, in particular to automatic detection equipment for the size of an exhaust pipe, and solves the problems that the existing detection of an automobile exhaust pipe mainly depends on manual detection, and whether the position degree, flatness and the like of a workpiece are qualified or not is judged by manually operating a bolt, a go-no go gauge and other tools; the device solves the problems that in the prior art, detection is time-consuming and labor-consuming, detection data cannot be embodied in a datamation mode, and clamps and trainees need to be frequently replaced, and comprises an installation supporting box, a main body positioning mechanism is installed in the middle of the upper end face of the installation supporting box, and a left oxygen sensor detection station is installed on the left side of the main body positioning mechanism; a corrugated pipe flange position degree detection mechanism is installed on the left side of the left oxygen sensor detection station, and a corrugated pipe flange positioning frame is installed behind the left oxygen sensor detection station. According to the invention, automatic positioning and multi-item synchronous detection are carried out on the exhaust pipe, so that the detection efficiency and the detection precision are effectively improved, and the detection data of the exhaust pipe can be conveniently acquired and stored.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust pipe detection, and specifically provides an automatic detection device for the size of an exhaust pipe. Background Technique

[0002] The exhaust pipe is a part of the engine exhaust system. The exhaust system mainly includes an exhaust manifold, an exhaust pipe, and a muffler. Generally, a three-way catalytic converter for controlling engine pollutant emissions is also installed in the exhaust system. The exhaust pipe usually adopts a double-layer corrugated pipe structure, with a wire mesh sleeve wrapped around the outside, and straight-edge sections and snap rings are configured at both ends to provide stable support. A telescopic joint or a mesh sleeve may be equipped inside the corrugated pipe to enhance the flexibility and efficiency of the system. During the automobile production and assembly process, various parameters of the exhaust pipe need to be detected.

[0003] The existing detection of automobile exhaust pipes mainly relies on manual detection. By manually operating tools such as pins and go-no-go gauges, it is judged whether the position degree, flatness, etc. of the workpiece are qualified. The detection is time-consuming and laborious, the detection data cannot be reflected numerically, and it is necessary to frequently replace jigs and train personnel; therefore, it does not meet the existing requirements, and for this reason, we propose an automatic detection device for the size of an exhaust pipe. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic detection device for the size of an exhaust pipe, so as to solve the problems presented in the above background technique that the existing detection of automobile exhaust pipes mainly relies on manual detection. By manually operating tools such as pins and go-no-go gauges, it is judged whether the position degree, flatness, etc. of the workpiece are qualified. The detection is time-consuming and laborious, the detection data cannot be reflected numerically, and it is necessary to frequently replace jigs and train personnel.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automatic detection device for the size of an exhaust pipe, including an installation support box. In the middle of the upper end face of the installation support box, a main body positioning mechanism is installed. On the left side of the main body positioning mechanism, a left oxygen sensor detection station is installed. On the left side of the left oxygen sensor detection station, a corrugated pipe flange position degree detection mechanism is installed. Behind the left oxygen sensor detection station, a corrugated pipe flange positioning frame is installed. On the left side of the corrugated pipe flange position degree detection mechanism, a corrugated pipe flatness detection mechanism is installed. On the right side of the main body positioning mechanism, a right oxygen sensor detection station is installed. At the rear end of the main body positioning mechanism, an auxiliary support mechanism is installed. Behind the auxiliary support mechanism, a rear assembly surface detection mechanism is installed. On the outside of the rear assembly surface detection mechanism, a welded flange detection mechanism is installed.

[0006] Preferably, an exhaust pipe is provided at the upper end of the main body positioning mechanism. The main body positioning mechanism includes a support frame. A calibration block is fixedly installed in the middle of the upper end surface of the support frame. A clamping jaw is rotatably connected to the upper end of the support frame. The bottom end of the exhaust pipe is fixedly connected to the support frame through a plurality of clamping jaws. A plurality of positioning pins are provided on the upper end surface of the support frame. Two main flange mounting block position detection mechanisms are installed inside the support frame. A flange flatness detection station is installed between the two main flange mounting block position detection mechanisms. The main flange mounting block position detection mechanism includes a cylinder mounting frame. The support frame is fixedly connected to the two cylinder mounting frames. A first cylinder is fixedly installed at the bottom end of the cylinder mounting frame. A first detection pin is fixedly installed at the output end of the first cylinder. The upper end of the first detection pin penetrates through the cylinder mounting frame and the support frame and is in close contact with the bottom end of the exhaust pipe.

[0007] Preferably, both the left oxygen sensor detection station and the right oxygen sensor detection station include a first mounting seat. A first displacement sensor is fixedly installed at the upper end of the first mounting seat. A detection shaft is slidably connected to one side of the first displacement sensor. The detection shaft is slidably connected to the first mounting seat. A second cylinder is fixedly installed at one end of the detection shaft. The second cylinder is fixedly connected to the first mounting seat. A zeroing pin is installed between the detection shaft and the output end of the second cylinder. A profile detection block is slidably installed at the other end of the detection shaft. A spring is provided between the profile detection block and the detection shaft.

[0008] Preferably, the bellows flange position detection mechanism includes a second mounting seat. A fourth cylinder is fixedly installed at the upper end of the second mounting seat. A linear guide rail is fixedly installed at the output end of the fourth cylinder. The linear guide rail is slidably connected to the upper end of the second mounting seat. Two third cylinders are fixedly installed at one end of the linear guide rail. A transmission frame is fixedly installed at the output ends of the two third cylinders. A second detection pin is slidably connected to the inner side of the upper end of the transmission frame. The second detection pin is connected to the transmission frame through a spring.

[0009] Preferably, the rear assembly surface detection mechanism includes a third mounting seat. A fifth cylinder is fixedly installed at the upper end of the third mounting seat. A linear pneumatic guide rail is fixedly installed at the output end of the fifth cylinder. A second displacement sensor is fixedly installed at the rear end of the linear pneumatic guide rail. A first connecting seat is fixedly installed on the upper end surface of the linear pneumatic guide rail. The second displacement sensor is slidably connected to the first connecting seat. An assembly profile detection plate is fixedly installed on the upper end surface of the first connecting seat. A third detection pin is slidably connected to the inner side of the assembly profile detection plate. The rear end of the third detection pin penetrates through the assembly profile detection plate and is connected to the first connecting seat through a spring.

[0010] Preferably, the welding flange detection mechanism includes a fourth mounting seat, on the upper end of which a sixth cylinder is fixedly installed. The output end of the sixth cylinder is fixedly installed with a seventh cylinder, and the output end of the seventh cylinder is fixedly installed with a second connecting seat. On the upper end face of the second connecting seat, a third displacement sensor is fixedly installed. In front of the third displacement sensor, a mounting hole detection rod is installed. On one side of the mounting hole detection rod, two welding flange profile detection rods are installed. The welding flange profile detection rods are slidably connected to the second connecting seat through springs, and the mounting hole detection rod is fixedly connected to the second connecting seat.

[0011] Preferably, both the flange flatness detection station and the bellows flatness detection mechanism include an X-direction linear module. On the upper end of the X-direction pointing module, a Y-direction linear module is installed. On the upper end of the Y-direction linear module, a Z-direction cylinder is fixedly installed, and the output end of the Z-direction cylinder is fixedly installed with a flatness detection head.

[0012] Preferably, the support frame, the first mounting seat, the second mounting seat, the third mounting seat, the fourth mounting seat, and the bellows flange positioning frame are all fixedly connected to the upper end of the installation support box. There is a bellows flange on the left side of the exhaust pipe, and the upper end of the bellows flange positioning frame is inserted into the inner side of the bellows flange.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the exhaust pipe is manually placed on the upper end face of the support frame and positioned and calibrated through a calibration block. The bellows flange positioning frame facilitates the positioning of the bellows flange of the exhaust pipe. The auxiliary support mechanism facilitates the auxiliary support of the rear end of the exhaust pipe. The first detection pin penetrates through the support frame and contacts the bottom end of the exhaust pipe to detect the position degree of the main flange mounting block of the exhaust pipe. The flatness detection heads in the flange flatness detection station and the bellows flatness detection mechanism synchronously detect the flange flatness and the bellows flatness of the exhaust pipe. The detection shaft elastically supports the profile detection block through a spring, facilitating the two profile detection blocks to detect the positions of the left and right oxygen sensors of the exhaust pipe; 2. In the present invention, two second detection pins detect the positional accuracy of the bellows flange under the elastic support of a spring through a transmission frame. Two third detection pins contact the rear assembly surface of the exhaust pipe, and then a second displacement sensor monitors the displacement of the third detection pins to detect the position of the rear assembly surface of the exhaust pipe. At the same time, the surface assembly profile of the exhaust pipe can be detected by an assembly profile detection plate. The second connecting seat drives the mounting hole detection rod and the welding flange profile detection rod to detect the profiles of the mounting holes and the welding flange of the exhaust pipe respectively. Through the flange flatness detection station, the left oxygen sensor detection station, the bellows flatness detection mechanism, the bellows flange positional accuracy detection mechanism, the rear assembly surface detection mechanism, the welding flange detection mechanism, and the right oxygen sensor detection station, various parameters of the exhaust pipe are detected synchronously, with high detection efficiency and accuracy, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a schematic installation structure diagram of the main body positioning mechanism of the present invention; Figure 3 is a schematic detection diagram of the exhaust pipe of the present invention; Figure 4 is a schematic positioning and supporting diagram of the exhaust pipe of the present invention; Figure 5 is a schematic structural diagram of the main body positioning mechanism of the present invention; Figure 6 is a schematic structural diagram of the main flange mounting block positional accuracy detection mechanism of the present invention; Figure 7 is a schematic structural diagram of the left oxygen sensor detection station of the present invention; Figure 8 is a schematic structural diagram of the bellows flange positional accuracy detection mechanism of the present invention; Figure 9 is a schematic structural diagram of the rear assembly surface detection mechanism of the present invention; Figure 10 is a schematic structural diagram of the welding flange detection mechanism of the present invention.

[0015] In the figure: 1. Main body positioning mechanism; 101. Support frame; 102. Positioning pin; 103. Pressing claw; 104. Position degree detection mechanism for main flange mounting block; 105. Calibration block; 106. First detection pin; 107. First cylinder; 108. Cylinder mounting frame; 2. Flange flatness detection station; 3. Levofloxacin sensor detection station; 301. First mounting seat; 302. Second cylinder; 303. Profile detection block; 304. Detection shaft; 305. First displacement sensor; 306. Zero setting pin; 4. Bellows flange positioning frame; 5. Bellows flatness detection mechanism; 6. Bellows flange position degree detection mechanism; 601. Second mounting seat; 602. Third cylinder; 603. Second detection pin; 604. Linear guide rail; 605. Fourth cylinder; 7. Auxiliary support mechanism; 8. Rear assembly surface detection mechanism; 801. Third mounting seat; 802. Third detection pin; 803. Assembly profile detection plate; 804. First connection seat; 805. Linear pneumatic guide rail; 806. Fifth cylinder; 807. Second displacement sensor; 9. Welded flange detection mechanism; 901. Fourth mounting seat; 902. Mounting hole detection rod; 903. Welded flange profile detection rod; 904. Sixth cylinder; 905. Seventh cylinder; 906. Second connection seat; 907. Third displacement sensor; 10. Right oxygen sensor detection station; 11. Installation support box. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0017] Please refer to Figures 1 to 6, an embodiment provided by the present invention: an automatic detection device for the size of an exhaust pipe, including an installation support box 11. In the middle of the upper end face of the installation support box 11, a main body positioning mechanism 1 is installed. An exhaust pipe is arranged above the main body positioning mechanism 1. The main body positioning mechanism 1 includes a support frame 101. In the middle of the upper end face of the support frame 101, a calibration block 105 is fixedly installed. The upper end of the support frame 101 is rotatably connected with a clamping jaw 103. The bottom end of the exhaust pipe is fixedly connected with the support frame 101 through a plurality of clamping jaws 103. A plurality of positioning pins 102 are arranged on the upper end face of the support frame 101. Two position detection mechanisms for the main flange mounting block 104 are installed inside the support frame 101. The position detection mechanism for the main flange mounting block 104 includes a cylinder mounting frame 108. The support frame 101 is fixedly connected with two cylinder mounting frames 108. At the bottom end of the cylinder mounting frame 108, a first cylinder 107 is fixedly installed. The output end of the first cylinder 107 is fixedly installed with a first detection pin 106. The upper end of the first detection pin 106 penetrates through the cylinder mounting frame 108 and the support frame 101 and is in close contact with the bottom end of the exhaust pipe. The first cylinder 107 drives the first detection pin 106 to penetrate through the support frame 101 and contact the bottom end of the exhaust pipe to detect the position degree of the main flange mounting block of the exhaust pipe.

[0018] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 7 , on the left side of the main body positioning mechanism 1, a left oxygen sensor detection station 3 is installed. On the right side of the main body positioning mechanism 1, a right oxygen sensor detection station 10 is installed. Both the left oxygen sensor detection station 3 and the right oxygen sensor detection station 10 include a first mounting seat 301. At the upper end of the first mounting seat 301, a first displacement sensor 305 is fixedly installed. On one side of the first displacement sensor 305, a detection shaft 304 is slidably connected. The detection shaft 304 is slidably connected with the first mounting seat 301. At one end of the detection shaft 304, a second cylinder 302 is fixedly installed. The second cylinder 302 is fixedly connected with the first mounting seat 301. A zeroing pin 306 is installed between the detection shaft 304 and the output end of the second cylinder 302. At the other end of the detection shaft 304, a profile detection block 303 is slidably installed. A spring is arranged between the profile detection block 303 and the detection shaft 304. The detection shaft 304 elastically supports the profile detection block 303 through the spring, facilitating the two profile detection blocks 303 to detect the positions of the left and right oxygen sensors of the exhaust pipe.

[0019] Please refer to Figures 1 to 5, a flange flatness detection station 2 is installed between two main flange mounting block position detection mechanisms 104, a bellows flange positioning frame 4 is installed behind the left oxygen sensor detection station 3, and a bellows flatness detection mechanism 5 is installed on the left side of the bellows flange position detection mechanism 6. Both the flange flatness detection station 2 and the bellows flatness detection mechanism 5 include an X-direction linear module. A Y-direction linear module is installed at the upper end of the X-direction pointing module, and a Z-direction cylinder is fixedly installed at the upper end of the Y-direction linear module. A flatness detection head is fixedly installed at the output end of the Z-direction cylinder. The flatness of the flange of the exhaust pipe and the flatness of the bellows are synchronously detected by the flatness detection head.

[0020] Please refer to Figure 3 , Figure 7 and Figure 8 , a bellows flange position detection mechanism 6 is installed on the left side of the left oxygen sensor detection station 3. The bellows flange position detection mechanism 6 includes a second mounting seat 601. A fourth cylinder 605 is fixedly installed at the upper end of the second mounting seat 601. A linear guide rail 604 is fixedly installed at the output end of the fourth cylinder 605. The linear guide rail 604 is slidably connected to the upper end of the second mounting seat 601. Two third cylinders 602 are fixedly installed at one end of the linear guide rail 604. A transmission frame is fixedly installed at the output ends of the two third cylinders 602. A second detection pin 603 is slidably connected to the inner side of the upper end of the transmission frame. The second detection pin 603 is connected to the transmission frame by a spring. The position of the bellows flange is detected by the two second detection pins 603 through the transmission frame under the elastic support of the spring.

[0021] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 9 , an auxiliary support mechanism 7 is installed at the rear end of the main body positioning mechanism 1, and a rear assembly surface detection mechanism 8 is installed behind the auxiliary support mechanism 7. The rear assembly surface detection mechanism 8 includes a third mounting seat 801. A fifth cylinder 806 is fixedly installed at the upper end of the third mounting seat 801. A linear pneumatic guide rail 805 is fixedly installed at the output end of the fifth cylinder 806. A second displacement sensor 807 is fixedly installed at the rear end of the linear pneumatic guide rail 805. A first connecting seat 804 is fixedly installed on the upper end surface of the linear pneumatic guide rail 805. The second displacement sensor 807 is slidably connected to the first connecting seat 804. An assembly contour detection plate 803 is fixedly installed on the upper end surface of the first connecting seat 804. A third detection pin 802 is slidably connected to the inner side of the assembly contour detection plate 803. The rear end of the third detection pin 802 penetrates through the assembly contour detection plate 803 and is connected to the first connecting seat 804 by a spring, realizing the detection of the position of the rear assembly surface of the exhaust pipe by the third detection pin 802, and at the same time, the surface assembly contour of the exhaust pipe can be detected by the assembly contour detection plate 803.

[0022] Please refer to Figure 1 、 Figure 3 and Figure 10 , on the outside of the rear assembly surface detection mechanism 8, a welding flange detection mechanism 9 is installed. The welding flange detection mechanism 9 includes a fourth mounting seat 901. At the upper end of the fourth mounting seat 901, a sixth cylinder 904 is fixedly installed. At the output end of the sixth cylinder 904, a seventh cylinder 905 is fixedly installed. At the output end of the seventh cylinder 905, a second connecting seat 906 is fixedly installed. On the upper end surface of the second connecting seat 906, a third displacement sensor 907 is fixedly installed. In front of the third displacement sensor 907, a mounting hole detection rod 902 is installed. On one side of the mounting hole detection rod 902, two welding flange profile detection rods 903 are installed. The welding flange profile detection rods 903 are slidably connected to the second connecting seat 906 through springs. The mounting hole detection rod 902 is fixedly connected to the second connecting seat 906. The second connecting seat 906 drives the mounting hole detection rod 902 and the welding flange profile detection rods 903 to be able to detect the mounting holes of the exhaust pipe and the profile of the welding flange respectively.

[0023] Please refer to Figures 1 to 10 , the support frame 101, the first mounting seat 301, the second mounting seat 601, the third mounting seat 801, the fourth mounting seat 901 and the bellows flange positioning frame 4 are all fixedly connected to the upper end of the mounting support box 11. There is a bellows flange on the left side of the exhaust pipe. The upper end of the bellows flange positioning frame 4 is inserted into the inside of the bellows flange. It is convenient to position the bellows flange of the exhaust pipe through the bellows flange positioning frame 4.

[0024] In summary, when detecting the automobile exhaust pipe, the exhaust pipe is manually placed on the upper end surface of the support frame 101 and positioned and calibrated through the calibration block 105. The cylinder provided at the bottom end of the positioning pin 102 drives the clamping claws 103 under the support of the support frame 101. Then, multiple clamping claws 103 fixedly install the exhaust pipe and the support frame 101. At the same time, it is convenient to position the bellows flange of the exhaust pipe through the bellows flange positioning frame 4. It is convenient to assist in supporting the rear end of the exhaust pipe through the auxiliary support mechanism 7. The first cylinder 107 drives the first detection pin 106 to penetrate through the support frame 101 and contact the bottom end of the exhaust pipe and detect the position degree of the main flange mounting block of the exhaust pipe under the support of the cylinder mounting frame 108; Through the X-axis linear module, Y-axis linear module and Z-axis cylinder in the flange flatness detection station 2 and the bellows flatness detection mechanism 5, the flatness detection head is driven to move. Then, the flatness detection heads in the flange flatness detection station 2 and the bellows flatness detection mechanism 5 synchronously detect the flange flatness and bellows flatness of the exhaust pipe; On both sides of the exhaust pipe, a left oxygen sensor detection station 3 and a right oxygen sensor detection station 10 are respectively installed. The second cylinder 302 drives the detection shaft 304 and the profile detection block 303 to slide linearly relative to the first displacement sensor 305 under the support of the first mounting seat 301. Furthermore, the displacement of the detection shaft 304 can be monitored by the first displacement sensor 305. At the same time, the detection shaft 304 elastically supports the profile detection block 303 through a spring, facilitating the two profile detection blocks 303 to detect the positions of the left and right oxygen sensors of the exhaust pipe; Start the fourth cylinder 605, so that the fourth cylinder 605 drives the two third cylinders 602 to move horizontally under the support of the second mounting seat 601, and the two third cylinders 602 synchronously drive the two second detection pins 603 to perform vertical adjustment through the transmission frame. Furthermore, the two second detection pins 603 detect the position degree of the bellows flange through the transmission frame under the elastic support of the spring. The fifth cylinder 806 drives the first connecting seat 804 to slide horizontally under the support of the third mounting seat 801. Furthermore, the first connecting seat 804 slides relative to the third mounting seat 801 through the linear pneumatic guide 805 and synchronously drives the two third detection pins 802 to contact the rear assembly surface of the exhaust pipe. Furthermore, the displacement of the third detection pin 802 is monitored by the second displacement sensor 807 to realize the detection of the position of the rear assembly surface of the exhaust pipe by the third detection pin 802. At the same time, the surface assembly profile of the exhaust pipe can be detected by the assembly profile detection plate 803; The position of the second connecting seat 906 can be adjusted in two directions through the sixth cylinder 904 and the seventh cylinder 905. Furthermore, the second connecting seat 906 drives the mounting hole detection rod 902 and the welding flange profile detection rod 903 to be able to detect the profiles of the mounting hole and the welding flange of the exhaust pipe respectively. After the exhaust pipe is positioned, fixed and supported by the main body positioning mechanism 1, the bellows flange positioning frame 4 and the auxiliary support mechanism 7, the flange flatness detection station 2, the left oxygen sensor detection station 3, the bellows flatness detection mechanism 5, the bellows flange position degree detection mechanism 6, the rear assembly surface detection mechanism 8, the welding flange detection mechanism 9 and the right oxygen sensor detection station 10 are synchronously started to detect various parameters of the exhaust pipe, realizing the automatic and all-round detection operation of the exhaust pipe, with high detection efficiency and accuracy, saving time and effort.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An automatic detection device for the size of an exhaust pipe, comprising a mounting support box (11), characterized in that: In the middle of the upper end face of the installation support box (11), a main body positioning mechanism (1) is installed. On the left side of the main body positioning mechanism (1), a left oxygen sensor detection station (3) is installed. On the left side of the left oxygen sensor detection station (3), a bellows flange position degree detection mechanism (6) is installed. Behind the left oxygen sensor detection station (3), a bellows flange positioning frame (4) is installed. On the left side of the bellows flange position degree detection mechanism (6), a bellows flatness detection mechanism (5) is installed. On the right side of the main body positioning mechanism (1), a right oxygen sensor detection station (10) is installed. At the rear end of the main body positioning mechanism (1), an auxiliary support mechanism (7) is installed. Behind the auxiliary support mechanism (7), a rear assembly surface detection mechanism (8) is installed. On the outside of the rear assembly surface detection mechanism (8), a welding flange detection mechanism (9) is installed.

2. The automated inspection device for the size of an exhaust pipe according to claim 1, wherein: At the upper end of the main body positioning mechanism (1), an exhaust pipe is provided. The main body positioning mechanism (1) includes a support frame (101). In the middle of the upper end face of the support frame (101), a calibration block (105) is fixedly installed. The upper end of the support frame (101) is rotatably connected to a clamping jaw (103). The bottom end of the exhaust pipe is fixedly connected to the support frame (101) through a plurality of clamping jaws (103). On the upper end face of the support frame (101), a plurality of positioning pins (102) are provided. Inside the support frame (101), two main flange mounting block position degree detection mechanisms (104) are installed. Between the two main flange mounting block position degree detection mechanisms (104), a flange flatness detection station (2) is installed. The main flange mounting block position degree detection mechanism (104) includes a cylinder mounting frame (108). The support frame (101) is fixedly connected to the two cylinder mounting frames (108). At the bottom end of the cylinder mounting frame (108), a first cylinder (107) is fixedly installed. The output end of the first cylinder (107) is fixedly installed with a first detection pin (106). The upper end of the first detection pin (106) passes through the cylinder mounting frame (108) and the support frame (101) and is in close contact with the bottom end of the exhaust pipe.

3. The automated inspection device for the size of an exhaust pipe according to claim 2, characterized in that: Both the left oxygen sensor detection station (3) and the right oxygen sensor detection station (10) include a first mounting seat (301). At the upper end of the first mounting seat (301), a first displacement sensor (305) is fixedly installed. On one side of the first displacement sensor (305), a detection shaft (304) is slidably connected. The detection shaft (304) is slidably connected to the first mounting seat (301). At one end of the detection shaft (304), a second cylinder (302) is fixedly installed. The second cylinder (302) is fixedly connected to the first mounting seat (301). A zeroing pin (306) is installed between the detection shaft (304) and the output end of the second cylinder (302). At the other end of the detection shaft (304), a profile detection block (303) is slidably installed. A spring is provided between the profile detection block (303) and the detection shaft (304).

4. An automated inspection device for the size of an exhaust pipe according to claim 3, characterized in that: The position degree detection mechanism (6) of the corrugated pipe flange includes a second mounting base (601). A fourth cylinder (605) is fixedly installed at the upper end of the second mounting base (601). A linear guide rail (604) is fixedly installed at the output end of the fourth cylinder (605). The linear guide rail (604) is slidably connected to the upper end of the second mounting base (601). Two third cylinders (602) are fixedly installed at one end of the linear guide rail (604). A transmission frame is fixedly installed at the output ends of the two third cylinders (602). A second detection pin (603) is slidably connected to the inner side of the upper end of the transmission frame. The second detection pin (603) is connected to the transmission frame through a spring.

5. The automatic detection device for the size of an exhaust pipe according to claim 4, characterized in that: The post-assembly surface detection mechanism (8) includes a third mounting base (801). A fifth cylinder (806) is fixedly installed at the upper end of the third mounting base (801). A linear pneumatic guide rail (805) is fixedly installed at the output end of the fifth cylinder (806). A second displacement sensor (807) is fixedly installed at the rear end of the linear pneumatic guide rail (805). A first connecting seat (804) is fixedly installed on the upper end surface of the linear pneumatic guide rail (805). The second displacement sensor (807) is slidably connected to the first connecting seat (804). An assembly profile detection plate (803) is fixedly installed on the upper end surface of the first connecting seat (804). A third detection pin (802) is slidably connected to the inner side of the assembly profile detection plate (803). The rear end of the third detection pin (802) penetrates through the assembly profile detection plate (803) and is connected to the first connecting seat (804) through a spring.

6. The automated inspection device for the size of an exhaust pipe according to claim 5, characterized in that: The welded flange detection mechanism (9) includes a fourth mounting base (901). A sixth cylinder (904) is fixedly installed at the upper end of the fourth mounting base (901). A seventh cylinder (905) is fixedly installed at the output end of the sixth cylinder (904). A second connecting seat (906) is fixedly installed at the output end of the seventh cylinder (905). A third displacement sensor (907) is fixedly installed on the upper end surface of the second connecting seat (906). An installation hole detection rod (902) is installed in front of the third displacement sensor (907). Two welded flange profile detection rods (903) are installed on one side of the installation hole detection rod (902). The welded flange profile detection rods (903) are slidably connected to the second connecting seat (906) through springs. The installation hole detection rod (902) is fixedly connected to the second connecting seat (906).

7. The automatic detection device for the size of an exhaust pipe according to claim 6, characterized in that: Both the flange flatness detection station (2) and the corrugated pipe flatness detection mechanism (5) include an X-direction linear module. A Y-direction linear module is installed at the upper end of the X-direction pointing module. A Z-direction cylinder is fixedly installed at the upper end of the Y-direction linear module. A flatness detection head is fixedly installed at the output end of the Z-direction cylinder.

8. The automated inspection device for the size of an exhaust pipe according to claim 7, characterized in that: The support frame (101), the first mounting seat (301), the second mounting seat (601), the third mounting seat (801), the fourth mounting seat (901) and the corrugated pipe flange positioning frame (4) are all fixedly connected to the upper end of the installation support box (11). A corrugated pipe flange is provided on the left side of the exhaust pipe, and the upper end of the corrugated pipe flange positioning frame (4) is inserted into the inner side of the corrugated pipe flange.

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