Device and method for detecting exhaust gas leakage

Abstract

The present invention discloses a device and a detection method for detecting exhaust gas leakage, which belongs to the field of sealing detection equipment. It mainly includes a mobile device, which includes a first connecting seat and a second connecting seat. One end of the first connecting seat is fixedly connected to a first servo, the output end of the first servo is connected to one end of the second connecting seat, the other ends of the first connecting seat and the second connecting seat are respectively connected to a second servo, the second servo is fixedly connected to the fixed seat, the bottom of the fixed seat is rotatably connected to the mobile seat through a rotating mechanism, the bottom of the mobile seat is provided with a magnetic block for fixing to the exhaust pipe, at least one inspection mechanism is fixedly connected to the mobile seat, and the ends of the two mobile seats that are far away from each other are respectively slidably connected to a fixed inspection mechanism. The present invention has a simple structure, realizes the rapid preliminary detection of the sealing of the exhaust pipe with a U-shaped fixing frame and a flange, and the fixed inspection of the suspected exhaust gas leakage position, greatly improving the detection accuracy and detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of sealing detection equipment, and in particular, relates to an equipment and a detection method for detecting exhaust gas leakage. Background Art

[0002] During the production of seamless steel pipes, the billets are usually heated in an annular heating furnace. Due to impurities in the fuel or incomplete combustion, a large amount of waste gas is generated during the heating process. The main components of the waste gas include carbon dioxide (CO2) and water vapor produced by combustion. In addition, carbon monoxide (CO), sulfur dioxide (SO2), NO X Waste gases such as pollutants and particulate matter are mainly transported through pipelines to purification devices for purification and treatment before being discharged. During the process of pipeline transportation of waste gases, it is necessary to ensure the effective sealing of the pipelines. If the waste gases leak in the workshop, it will seriously endanger the health of workers.

[0003] A Chinese patent with publication number "CN118565721A" discloses a gas leak detection device and a detection method thereof. Arc frame one and arc frame two are fixed to the surface of a gas pipeline by threaded rods. Contact components are provided inside the arc frame one and arc frame two. The contact components are used to contact the gas pipeline, so that the arc frame one can move on the surface of the gas pipeline, allowing a laser gas detector to move on the surface of the gas pipeline, thereby inspecting and detecting the gas pipeline to avoid untimely discovery of gas leaks in the gas pipeline. An inspection component is provided on the top of the arc frame one, and the inspection component is used to drive the arc frame one to move.

[0004] Although the above patent solves the problem of patrol inspection of gas pipelines, it still has the following shortcomings: 1. The above detection device can only move along the axis of the gas pipeline, so it can only perform preliminary inspections and cannot accurately determine the specific leakage point. In addition, the device has a complex structure, is inconvenient to maintain and use, and has low detection efficiency; 2. It has great limitations in use and cannot be used for patrol inspection of exhaust pipes fixed on the top of the workshop, such as Figure 1 As shown, in order to save workshop space, the exhaust pipe 1 is usually fixedly installed near the top of the workshop through multiple U-shaped fixing frames 101. Therefore, the ring-shaped leakage detection device cannot pass through the U-shaped fixing frame 101; 3. It cannot be used for sealing detection when multiple pipes are connected. For example, when the exhaust pipe 1 is connected, it is formed by sealingly connecting multiple pipes through flanges 102. Therefore, there are multiple flanges 102 on the exhaust pipe 1. The above structure cannot pass through the flanges 102, resulting in its large limitations and inability to be used. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide an apparatus and a detection method for detecting exhaust gas leakage, which has a simple structure and realizes rapid preliminary detection of the sealing of the exhaust gas pipe with a U-shaped fixing frame and a flange and fixed inspection of suspected exhaust gas leakage points, thereby quickly determining the leakage location and greatly improving the detection accuracy and detection efficiency.

[0006] The device for detecting exhaust gas leakage includes a moving device, which includes a first connecting seat and a second connecting seat. One end of the first connecting seat is fixedly connected to the first servo, the output end of the first servo is connected to one end of the second connecting seat, the other ends of the first connecting seat and the second connecting seat are respectively connected to the second servo, the second servo is fixedly connected to the fixed seat, the bottom of the fixed seat is rotatably connected to the moving seat through a rotating mechanism, the bottom of the moving seat is provided with a magnetic block for fixing to the exhaust gas pipe, at least one inspection mechanism is fixedly connected to the moving seat, and the ends of the two moving seats that are away from each other are respectively slidably connected to the fixed inspection mechanism.

[0007] Preferably, the fixed inspection mechanism includes two relatively arranged arc-shaped outer sliding frames, and a driving mechanism is provided between the two arc-shaped outer sliding frames to drive them to slide synchronously toward each other or relative to each other. An arc-shaped inner sliding frame is slidably connected to each other in each arc-shaped outer sliding frame, and a gas detection probe is fixedly connected to the end of the arc-shaped inner sliding frame close to the sliding direction, and a gas detection probe is also installed on the end of the arc-shaped outer sliding frame close to the end of the movable seat away from the sliding direction. The angles of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame are both 95-100°, and the sliding direction of the arc-shaped inner sliding frame is the same as the sliding direction of the arc-shaped outer sliding frame.

[0008] Preferably, an arcuate outer rack is provided on each opposite side of the two arcuate outer sliding frames, the driving mechanism includes a U-shaped seat, the bottom of the U-shaped seat is fixedly connected to the movable seat, and the movable seat is arranged in the middle position of the arcuate outer sliding frame, and a driving motor is fixedly connected to the U-shaped seat, the output end of the driving motor passes through the U-shaped seat and is fixedly connected to a driving gear, and the driving gear is respectively engaged with the arcuate outer racks on both sides.

[0009] The transmission belt 1 is rotatably connected between the first pulley and the second pulley located at one end of the arc outer sliding frame, and the transmission belt 2 is rotatably connected between the second pulleys located at both ends of the arc outer sliding frame, and the transmission belt 2 is fixedly connected to the inner end of the arc inner sliding frame through a connecting seat.

[0010] Preferably, the transmission belt 1 and the transmission belt 2 pass through the first pulley and the second pulley on the upper and lower rotating shafts respectively in sequence, and the lower end surfaces of the upper layers of the transmission belt 1 and the transmission belt 2 are in contact with the upper surface of the pulley located above, and the lower end surfaces of the lower layers of the transmission belt 1 and the transmission belt 2 are in contact with the upper surface of the pulley located below, and the transmission ratio of the driven large gear and the driven small gear is 1:2.

[0011] Preferably, the movable seat includes an arc-shaped base, the bottom of the arc-shaped base is movably connected to a plurality of magnetic blocks, the top of the arc-shaped base is fixedly connected to a rotating shaft at a position away from the center, the rotating shaft is connected to the fixed end of the rotating mechanism, and the arc-shaped base is provided with an arc-shaped groove respectively matched with two arc-shaped outer sliding frames, and an arc-shaped inner rack is fixedly connected in the arc-shaped groove, and the arc-shaped inner rack is engaged with the driven large gear.

[0012] Preferably, T-slots are respectively provided on both sides of the arc-shaped inner rack, a T-slide block slidingly matched with the T-slot is fixedly connected to the bottom of the arc-shaped outer sliding frame, one end of the arc-shaped outer sliding frame away from the sliding direction of the arc-shaped inner sliding frame is fixedly connected to a limiting plate, the other end of the arc-shaped outer sliding frame is fixedly connected to a sliding limit block 1, and the arc-shaped inner sliding frame is fixedly connected to a sliding limit block 2 matching with the sliding limit block 1.

[0013] Preferably, the bottom of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame close to the sliding-out direction are both provided with a magnetic support mechanism, the magnetic support mechanism includes a mounting hole, the inner end surface of the mounting hole is fixedly connected to a rod sleeve, a telescopic rod is slidably connected in the rod sleeve, the bottom of the telescopic rod is fixedly connected to a magnetic seat, a ball is rotatably connected in the magnetic seat, a spring is commonly provided on the outside of the rod sleeve and the telescopic rod, and both ends of the spring are respectively against the inner end surface of the mounting hole and the magnetic seat.

[0014] Preferably, at least one sensing probe for sensing obstacles is provided at one end of the two movable seats away from each other, and the inspection mechanism is provided with a second gas detection probe, which is arranged on one side, both sides or the opposite end of the two movable seats.

[0015] The method for detecting exhaust gas leakage, using the above-mentioned device for detecting exhaust gas leakage, comprises the following steps:

[0016] S1. The moving device controls the first steering gear and the two second steering gears to work together to realize the movement of the two moving seats on the outer wall of the exhaust pipe, and the exhaust pipe is inspected by the inspection mechanism;

[0017] S2. When the inspection mechanism detects that the exhaust gas outside the exhaust pipe exceeds the standard, the mobile device stops moving, and the driving mechanism on the mobile base where the inspection mechanism is located rotates forward, driving the two arc-shaped outer sliding frames to rotate 45-50 degrees toward each other. During this process, the arc-shaped inner sliding frame extends synchronously, thereby driving the gas detection probe to rotate around the outer wall of the exhaust pipe for regular inspection;

[0018] S3. With the moving seat in S2 as the support point, the other moving seat moves forward under the action of the moving device, and then pulls the moving seat in S2 to move forward close to the exhaust pipe. At the same time, the driving mechanism cyclically reverses and rotates forward to conduct a detailed inspection of the outer wall of the exhaust pipe where the exhaust gas exceeds the standard, thereby narrowing the scope of the leakage until the specific leakage location is found.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adds a moving device and arranges two moving seats at the bottom of the moving device. The first connecting seat and the second connecting seat are connected by rotation at the upper end to realize the alternating advancement of the two moving seats. A slewing mechanism is added between the moving seat and the corresponding connecting seat. The slewing mechanism cooperates with the first connecting seat and the second connecting seat to realize crossing obstacles such as flanges; a retractable fixed inspection mechanism is added to the moving seat. The angle of the fixed inspection mechanism is controlled at about 110° when it is retracted, so that the present invention can smoothly pass through the U-shaped fixed frame during inspection, which greatly improves the versatility of the equipment.

[0021] 2. The angles of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame in the fixed inspection mechanism are controlled at 95-100°. When the arc-shaped inner sliding frame and the arc-shaped outer sliding frame are unfolded, the angle can cover the entire outside of the pipe wall, and a magnetic support mechanism is added to the bottom of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame. Under the action of the magnetic seat, the magnetic support mechanism can ensure that the end of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame 4 that slides out is always tightly attached to the outer wall of the exhaust pipe. At the same time, the ball bearings can assist it in radial and axial movement in the exhaust pipe, thereby facilitating the fixed inspection mechanism to perform fixed inspection of exhaust gas leakage as the moving device moves forward outside the pipe wall.

[0022] 3. A driven large gear, a driven small gear, and upper and lower rotating shafts and pulleys are arranged in the arc-shaped outer sliding frame. The driven large gear can drive the corresponding two sets of transmission belts to transmit the power by meshing with the arc-shaped inner rack. Among them, the lower end surfaces of the upper layers of the transmission belt 1 and the transmission belt 2 are in contact with the upper surfaces of the corresponding pulleys on the upper rotating shaft. At the same time, the lower end surfaces of the lower layers of the transmission belt 1 and the transmission belt 2 are in contact with the upper surfaces of the corresponding pulleys on the lower rotating shaft, and the upper end surfaces of the lower layers of the transmission belt 1 and the transmission belt 2 are in contact with the lower surfaces of the corresponding pulleys on the upper rotating shaft, thereby ensuring that the transmission belt 1 and the transmission belt 2 are effectively transmitted along the arc structure trajectory, and the transmission belt does not rub against the moving seat, so that when the arc-shaped outer sliding frame slides out, the arc-shaped inner sliding frame slides out synchronously, so as to facilitate detailed inspection of the exhaust gas leakage on the pipe wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the installation of the exhaust pipe;

[0024] Figure 2 A reference diagram of the present invention in use on an exhaust pipe;

[0025] Figure 3 This is a reference diagram of the present invention crossing the U-shaped fixing frame;

[0026] Figure 4 This is a reference diagram of the state of the present invention crossing the flange;

[0027] Figure 5 This is a reference diagram of the state of the regular inspection on the exhaust pipe of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the present invention;

[0029] Figure 7 It is a structural diagram of the mobile seat;

[0030] Figure 8 for Figure 7 A partial enlarged view of part A;

[0031] Figure 9 Schematic diagram of the bottom structure of the mobile seat;

[0032] Figure 10 This is a schematic diagram of the structure when the scheduled inspection agency is closed;

[0033] Figure 11 This is a schematic diagram of the structure of the scheduled inspection organization when it is expanded;

[0034] Figure 12 It is a structural diagram of the magnetic support mechanism;

[0035] Figure 13 Schematic diagram of the coordination between the arc-shaped outer sliding frame and the arc-shaped inner sliding frame;

[0036] Figure 14 Schematic diagram of the bottom structure of the arc-shaped outer sliding frame;

[0037] Figure 15 Schematic diagram of the installation of transmission belt 1 and transmission belt 2 in the arc-shaped outer sliding frame;

[0038] Figure 16 Schematic diagram of the structure of the arc-shaped inner sliding frame;

[0039] Figure 17 for Figure 13 A partial enlarged view of part B;

[0040] Figure 18 for Figure 13 A partial enlarged view of part C in the middle;

[0041] Figure 19 for Figure 14 A partial enlarged view of part D.

[0042] In the figure, 1. exhaust pipe; 101. U-shaped fixing frame; 102. flange; 2. moving device; 201. first connecting seat; 202. control box; 203. first servo; 204. second connecting seat; 205. second servo; 206. fixing seat; 207. rotary mechanism; 3. fixed inspection mechanism; 301. driving motor; 302. U-shaped seat; 303. driving gear; 304. arc-shaped outer sliding frame; 3041. arc-shaped outer rack; 3042. limiting plate; 3043. sliding limiting block 1; 3044. driven large gear; 3045. driven small gear; 3046. first pulley; 3047. second pulley; 3048. rotating shaft ;3049, transmission belt one; 30410, transmission belt two; 30411, T-shaped slider; 305, arc-shaped inner sliding frame; 3051, sliding limit block two; 306, gas detection probe one; 307, magnetic support mechanism; 3071, rod sleeve; 3072, telescopic rod; 3073, spring; 3074, magnetic seat; 3075, ball bearing; 4, inspection mechanism; 401, gas detection probe two; 5, moving seat; 501, rotating shaft; 502, arc-shaped groove; 503, rotating shaft; 504, induction probe; 505, arc-shaped base; 506, arc-shaped inner rack; 507, T-shaped groove; 508, arc-shaped limit strip; 509, magnetic block. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings:

[0044] The directional terms used in the detailed description are intended solely to facilitate understanding of the technical solutions described herein by those skilled in the art based on the visual orientation shown in the accompanying drawings. Unless otherwise specified or limited, the terms "dispose," "install," and "connect" are to be interpreted broadly, and those skilled in the art will understand their specific meanings within the present invention based on the specific circumstances.

[0045] Example 1:

[0046] like Figures 6 to 19 As shown, a device for detecting exhaust gas leakage includes a mobile device 2, which includes a first connecting seat 201 and a second connecting seat 204. The upper end of the first connecting seat 201 is fixedly connected to a first steering gear 203, and the output end of the first steering gear 203 is fixedly connected to the upper end of the second connecting seat 204. The lower ends of the first connecting seat 201 and the second connecting seat 204 are respectively fixedly connected to the output end of the second steering gear 205. The body of the second steering gear 205 is fixedly connected to a fixed seat 206. The bottom of the fixed seat 206 is rotatably connected to the mobile seat 5 through a rotating mechanism 207. The fixed seat 206 and the rotating mechanism 207 are connected. The rotating end is fixedly connected, the fixed end of the rotary mechanism 207 is fixedly connected to the movable seat 5, and a magnetic block 509 for fixing to the exhaust pipe is provided at the bottom of the movable seat 5. The magnetic block 509 is preferably an electromagnetic suction cup. One or more inspection mechanisms 4 are fixedly connected to the movable seat 5. The inspection mechanism 4 is preferably a laser gas detector. The laser gas detector has its own alarm mechanism. A gas detection probe 2 401 is provided on the inspection mechanism 4. The gas detection probe 2 401 can be set on one side or both sides of the movable seat 5 or on the opposite end of the two movable seats 5 according to needs. The ends of the two movable seats 5 that are away from each other are respectively slidably connected with a fixed inspection mechanism 3.

[0047] In this embodiment, a control box 202 is installed in the first connecting seat 201. The first steering gear 203, the second steering gear 205, the rotary mechanism 207, the fixed inspection mechanism 3, and the patrol inspection mechanism 4 are all connected to the control box 202. The control box 202 can control the coordinated operation of the mobile device 2, the fixed inspection mechanism 3, and the patrol inspection mechanism 4. The second gas detection probe 401 is preferably arranged at the opposite end of the two mobile seats 5, and the second gas detection probes 401 on the two mobile seats 5 are staggered. On the one hand, the second gas detection probe 401 is used to detect leaks in the exhaust gas pipe 1 over a large range. On the other hand, it can cooperate with the fixed inspection mechanism 3 to perform a small-scale fixed inspection on the pipe wall in contact with the mobile seat 5, thereby narrowing the scope of the leak investigation and improving the accuracy of the sealing detection.

[0048] Example 2:

[0049] like Figures 10 to 15As shown, the fixed inspection mechanism 3 includes two oppositely positioned arcuate outer slides 304. A drive mechanism is provided between the two arcuate outer slides 304 to drive them to slide synchronously toward or relative to each other. The two arcuate outer slides 304 are centrally symmetrical about the axis of the drive mechanism's power output shaft. An arcuate inner slide 305 is slidably connected to each arcuate outer slide 304. The sliding direction of the arcuate inner slide 305 is the same as that of the arcuate outer slide 304. That is, the two sets of arcuate outer slides 304 and arcuate inner slides 305 slide in opposite directions. A gas detection probe 306 is fixedly connected to one end of the arc-shaped inner sliding frame 305 close to the sliding direction, and a gas detection probe 306 is also installed on the end of the arc-shaped outer sliding frame 304 close to the end of the movable seat 5 away from the sliding direction. The gas detection probe 306 is connected to the inspection mechanism 4. The gas detection probe 306 is used to perform detailed regular inspections on the outer periphery of the pipe wall of the exhaust gas pipe 1. In this embodiment, the angles of the arc-shaped inner sliding frame 305 and the arc-shaped outer sliding frame 304 are both 95-100°. When the arc-shaped inner sliding frame 305 and the arc-shaped outer sliding frame 304 are unfolded, the angle can cover the entire outside of the pipe wall; when retracted, it does not hinder the movable seat 5 from passing through the U-shaped fixed frame 101, thereby improving the versatility of the equipment.

[0050] An arcuate outer rack 3041 is provided on each opposite side of the two arcuate outer sliding frames 304. The driving mechanism includes a U-shaped seat 302. The bottom of the U-shaped seat 302 is fixedly connected to the upper end surface of the movable seat 5, and the movable seat 5 is arranged in the middle position of the arcuate outer sliding frame 304, that is, the arcuate outer sliding frame 304 is installed in the middle position of the movable seat 5. A driving motor 301 is fixedly connected to the U-shaped seat 302. The driving motor 301 adopts a reduction motor. A rotating shaft 503 is rotatably connected to the U-shaped seat 302. The output end of the driving motor 301 passes through the U-shaped seat 302 and is fixedly connected to the rotating shaft 503. The bottom of the rotating shaft 503 is rotatably connected to the movable seat 5. A driving gear 303 is fixedly connected to the rotating shaft 503. The driving gear 303 is respectively engaged with the arcuate outer racks 3041 on both sides. The driving motor 301 is started, and the driving motor 301 drives the driving gear 303 to rotate via the rotating shaft 503. As the driving gear 303 rotates forward or reverse, the two arc-shaped outer sliding frames 304 can be driven to slide toward each other or relative to each other.

[0051] like Figure 14 and Figure 15 As shown, the bottom of the arc-shaped outer sliding frame 304 is rotatably connected to a plurality of equally spaced rotating shafts 3048, and adjacent rotating shafts 3048 are staggered up and down. Each rotating shaft 3048 is fixedly connected to a first pulley 3046 and a second pulley 3047 near the two ends, and the first pulley 3046 and the second pulley 3047 are preferably synchronous pulleys, as shown in FIG. Figure 19As shown, a driven small gear 3045 is fixedly connected to the rotating shaft 3048 located in the middle of the arc-shaped outer sliding frame 304, and the driven small gear 3045 is arranged between the first pulley 3046 and the second pulley 3047. The driven small gear 3045 is meshed with the driven large gear 3044 through the transfer gear. The transfer gear and the driven large gear 3044 are respectively rotatably connected to the arc-shaped outer sliding frame 304 through the driven shaft, wherein a transmission belt 1 3049 is rotatably connected between the first pulley 3046 coaxial with the driven small gear 3045 and the first pulley 3046 located at one end of the arc-shaped outer sliding frame 304, and a transmission belt 2 30410 is rotatably connected between the second pulleys 3047 located at both ends of the arc-shaped outer sliding frame 304, and the transmission belt 2 30410 is fixedly connected to the inner end of the arc-shaped inner sliding frame 305 through a connecting seat. The driven large gear 3044 drives the driven small gear 3045 to rotate, so that the first pulley 3046 on the rotating shaft 3048 where the driven small gear 3045 is located drives the transmission belt 1 3049 to rotate, and then drives the transmission belt 2 30410 to rotate. The transmission belt 2 30410 pulls the arc-shaped inner sliding frame 305 to move synchronously, thereby realizing the extension or contraction of the arc-shaped inner sliding frame 305.

[0052] like Figure 15 As shown, transmission belt 1 3049 and transmission belt 2 30410 pass through the first pulley 3046 and the second pulley 3047 on the upper and lower rotating shafts 3048 respectively. To ensure the effective transmission of transmission belt 1 3049 and transmission belt 2 30410, the lower end surfaces of the upper layers of transmission belt 1 3049 and transmission belt 2 30410 are in contact with the upper surfaces of the corresponding pulleys on the upper rotating shaft 3048. At the same time, the lower end surfaces of the lower layers of transmission belt 1 3049 and transmission belt 2 30410 are in contact with the upper surfaces of the corresponding pulleys on the lower rotating shaft 3048, and the upper end surfaces of the lower layers of transmission belt 1 3049 and transmission belt 2 30410 are in contact with the lower surfaces of the corresponding pulleys on the upper rotating shaft 3048, thereby ensuring that transmission belt 1 3049 and transmission belt 2 30410 are effectively transmitted along the arc structure trajectory, and the transmission belts do not rub against the moving seat 5.

[0053] like Figures 7 to 9As shown, the movable seat 5 includes an arc-shaped base 505, and the shape of the arc-shaped base 505 is similar to the outer wall of the exhaust pipe 1. The bottom of the arc-shaped base 505 is movably connected with a plurality of magnetic blocks 509, and the magnetic blocks 509 can adsorb the present invention on the outer wall of the exhaust pipe 1. The end of the top of the arc-shaped base 505 away from the center is fixedly connected with a rotating shaft 501, and the rotating shaft 501 is connected to the fixed end of the rotating mechanism 207. The rotating end of the rotating mechanism 207 is connected to the fixed seat 206. The position of the arc-shaped base 505 away from the rotating shaft 501 is provided with an arc-shaped groove 502 respectively matched with the two arc-shaped outer sliding frames 304, and an arc-shaped inner rack 506 is fixedly connected in the arc-shaped groove 502. The arc-shaped inner rack 506 is meshed with the driven large gear 3044, and the transmission ratio of the driven large gear 3044 to the driven small gear 3045 is 1:2. During the sliding process of the arc-shaped outer sliding frame 304, the arc-shaped inner rack 506 can automatically drive the driven large gear 3044 to rotate without the participation of a power mechanism, resulting in a more compact structure and more reliable transmission.

[0054] In this embodiment, T-slots 507 are provided on both sides of the arc-shaped inner rack 506, and an arc-shaped limiting strip 508 is provided between the T-slot 507 and the arc-shaped inner rack 506. The cross section of the arc-shaped limiting strip 508 is an inverted L-shaped structure, and the upper end surface of the arc-shaped limiting strip 208 is lower than the upper end surface of the arc-shaped base 505. This structure provides space for the installation of the first pulley 3046, the second pulley 3047 and the corresponding transmission belt, and can also prevent the transmission belt from interfering with the arc-shaped base 505. Figure 14 As shown, a T-shaped slider 30411 is fixedly connected to the bottom of the curved outer sliding frame 304, which slides in engagement with the T-shaped slot 507. The bottom of the curved outer sliding frame 304 has a hollow structure. The end of the curved outer sliding frame 304, which is away from the sliding direction of the curved inner sliding frame 305, is fixedly connected to a limit plate 3042. The other end of the curved outer sliding frame 304 is fixedly connected to a first sliding limit block 3043. The curved inner sliding frame 305 is fixedly connected to a second sliding limit block 3051, which cooperates with the first sliding limit block 3043. Furthermore, a mounting block is fixedly connected to the bottom of the end of the curved outer sliding frame 304 where the first sliding limit block 3043 is located.

[0055] The bottom of the arc-shaped inner sliding frame 305 and the arc-shaped outer sliding frame 304 close to the sliding direction are both provided with a magnetic support mechanism 307, and the magnetic support mechanism 307 on the arc-shaped outer sliding frame 304 is set on the mounting block, such as Figure 12As shown, the magnetic support mechanism 307 includes a mounting hole, the inner end surface of which is fixedly connected to a rod sleeve 3071. A telescopic rod 3072 is slidably connected within the rod sleeve 3071. A magnetic seat 3074 is fixedly connected to the bottom of the telescopic rod 3072. A ball bearing 3075 is rotatably connected within the magnetic seat 3074. A spring 3073 is sheathed around the rod sleeve 3071 and the telescopic rod 3072. The ends of the spring 3073 respectively abut against the inner end surface of the mounting hole and the magnetic seat 3074. Under the action of the magnetic seat 3074, the magnetic support mechanism 307 ensures that the ends of the arc-shaped inner sliding frame 305 and the arc-shaped outer sliding frame 304 at one end are always in close contact with the outer wall of the exhaust pipe 1. At the same time, the ball bearing 3075 assists the mechanism in radial and axial movement within the exhaust pipe 1, thereby facilitating the inspection mechanism 3 to perform exhaust gas leakage inspection as the moving device 2 advances outside the pipe wall.

[0056] In this embodiment, one or more sensor probes 504 for sensing obstacles are provided at the ends of the two moving bases 5 that are separated from each other. The sensor probes 504 are connected to the control box 202. During the movement of the present invention, the sensor probes 504 sense obstacles in front and on both sides to avoid collision with the obstacles. Other aspects are the same as those of the first embodiment.

[0057] like Figures 1 to 19 As shown, the method for detecting exhaust gas leakage includes the device for detecting exhaust gas leakage described in Example 2, specifically comprising the following steps:

[0058] S1. The two movable seats 5 are adsorbed on the outer wall of the exhaust pipe 1 through the magnetic block 509. The movable device 2 controls the first servo 203 and the two second servos 205 through the control box 202 to work together to realize the movement of the two movable seats 5 on the outer wall of the exhaust pipe, and the sealing of the exhaust pipe 1 is inspected by the inspection mechanism 4.

[0059] The specific moving process of the mobile device 2 is as follows: Figure 2As shown, when it is necessary to move forward, the rear moving seat 5 is used as a support point, the magnetic block 509 at the bottom of the front moving seat 5 is powered off, and the first steering gear 203 is started, driving the second connecting seat 204 to rotate counterclockwise by a certain angle, lifting the front moving seat 5, and at the same time, the second steering gear 205 above the front moving seat 5 is rotated so that the axis of the arc base 505 in the front moving seat 5 is always in a position parallel to the axis of the exhaust pipe 1. Then, the second steering gear 205 on the rear moving seat 5 is started, driving the first connecting seat 201 to rotate clockwise, placing the front moving seat 5 on the exhaust pipe 1, and at the same time, the magnetic block 509 at the bottom is energized so that the front moving seat 5 is adsorbed on the wall of the exhaust pipe 1, at this time, the front moving seat 5 is moved forward; then, the front moving seat 5 is used as a support point again, and the first steering gear 203 and the second steering gear 205 on the front moving seat 5 cooperate to realize the forward movement of the rear moving seat 5, completing the forward process of the present invention. When it is necessary to move backward, the principle is the same as above and will not be repeated.

[0060] When the pipe turns, as long as the moving seat 5 is in the same direction as the axis of the exhaust pipe 1, the invention can turn and move forward synchronously. The principle is the same as above and will not be repeated.

[0061] like Figure 3 As shown, by repeating the above steps, the present invention can smoothly pass through the U-shaped fixing bracket 101.

[0062] like Figure 4 As shown, when the sensing probe 504 on the front moving seat 5 senses an obstacle such as the flange 102, the front moving seat 5 is used as a support point, the first servo 203 is started, the rear moving seat 5 is lifted, and then the rotary mechanism 207 above the front moving seat 5 is rotated, driving the entire moving device 2 to rotate and cross the obstacle. During this process, the second servo 205 on the moving seat 5 at the mobile end (originally located at the rear moving seat 5) must ensure that when it is lowered, the axis of the arc-shaped base 505 is parallel to the axis of the exhaust pipe 1. The first servo 203 and the second servo 205 at the support point work together to place and adsorb and fix the moving seat 5 at the mobile end on the exhaust pipe 1, and then use the moving seat 5 as a support point to repeat the above actions to complete the action of crossing obstacles such as the flange 102.

[0063] S2, such as Figure 5As shown, during the above movement process, if the gas detection probe 2 401 on the inspection mechanism 4 detects that the exhaust gas outside the exhaust pipe exceeds the standard, the moving device 2 stops moving first, and the driving motor 301 on the moving base 5 where the inspection mechanism 4 is located rotates forward, driving the driving gear 303 to rotate, and the driving gear 303 drives the two arc-shaped outer sliding frames 304 to slide 45-50 degrees toward each other in the corresponding T-slots 507. During the sliding process of the arc-shaped outer sliding frames 304, the driven large gear 3044 at the bottom of the arc-shaped outer sliding frames 304 engages with the arc-shaped inner rack 506, causing the driven large gear 3044 to rotate, and the driven large gear 3043 rotates. 044 drives the transfer gear to accelerate, and the transfer gear drives the driven pinion 3045 to rotate. The rotating shaft 3048 where the driven pinion 3045 is located drives the transmission belt 1 3049 to transmit through the first pulley 3046. The transmission belt 1 3049 drives the transmission belt 2 30410 to transmit. The transmission belt 2 30410 pulls the arc-shaped inner sliding frame 305 to extend synchronously through the connecting seat, and the sliding length of the arc-shaped inner sliding frame 305 is twice that of the arc-shaped outer sliding frame 304. The arc-shaped inner sliding frame 305 drives the gas detection probe 1 306 to rotate around the outer wall of the exhaust pipe 1 to its bottom, and performs regular inspection on the outer wall during the rotation.

[0064] S3. With the moving seat 5 in S2 as the support point, another moving seat 5 moves forward under the action of the moving device 2. The fixed inspection mechanism 3 on this moving seat 5 does not extend, and then pulls the moving seat 5 in S2 to move forward close to the exhaust pipe. At the same time, the driving mechanism cyclically reverses and rotates forward, so that the moving seat 5 drives the arc-shaped outer sliding frame 304 and the arc-shaped inner sliding frame 305 to slide forward during the slow forward process. At the same time, the arc-shaped outer sliding frame 304 and the arc-shaped inner sliding frame 305 frequently contract and extend, and the outer wall of the exhaust pipe where the exhaust gas exceeds the standard is checked in detail, thereby narrowing the scope of the leakage until the specific leakage location is found.

[0065] Finally, although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An apparatus for detecting exhaust gas leakage, comprising a mobile device (2), characterized in that: The mobile device (2) comprises a first connecting seat (201) and a second connecting seat (204), one end of the first connecting seat (201) is fixedly connected to a first steering gear (203), an output end of the first steering gear (203) is connected to one end of the second connecting seat (204), the other ends of the first connecting seat (201) and the second connecting seat (204) are respectively connected to a second steering gear (205), the second steering gear (205) is fixedly connected to a fixed seat (206), the bottom of the fixed seat (206) is rotatably connected to the mobile seat (5) through a rotary mechanism (207), a magnetic block (509) for fixing to an exhaust pipe is provided at the bottom of the mobile seat (5), at least one inspection mechanism (4) is fixedly connected to the mobile seat (5), and the ends of the two mobile seats (5) that are away from each other are respectively slidably connected to a fixed inspection mechanism (3); The fixed inspection mechanism (3) includes two arc-shaped outer sliding frames (304) arranged opposite to each other, and a driving mechanism for driving the two arc-shaped outer sliding frames (304) to slide synchronously toward each other or relative to each other is provided between the two arc-shaped outer sliding frames (304). An arc-shaped inner sliding frame (305) is slidably connected to each arc-shaped outer sliding frame (304), and a gas detection probe (306) is fixedly connected to one end of the arc-shaped inner sliding frame (305) close to the sliding direction. A gas detection probe (306) is also installed at one end of the arc-shaped outer sliding frame (304) close to the end of the movable seat (5) away from the sliding direction. The bottom of the arc-shaped outer sliding frame (304) is rotatably connected to a plurality of rotating shafts (3048) arranged at equal intervals, and adjacent rotating shafts (3048) are staggered up and down. Each rotating shaft (3048) is fixedly connected to a first pulley (3046) and a second pulley (3047) near the two ends thereof. A driven pinion (3045) is fixedly connected to the rotating shaft (3048) located in the middle of the arc-shaped outer sliding frame (304). The driven pinion (3045) is arranged between the first pulley (3046) and the second pulley (3047). The driven pinion (3045) is connected to the first pulley (3046) and the second pulley (3047) through the intermediate gear. The driven large gear (3044) is meshed, and the driven large gear (3044) is rotatably connected to the arc-shaped outer sliding frame (304) through a driven shaft. A transmission belt 1 (3049) is rotatably connected between a first pulley (3046) coaxial with the driven small gear (3045) and the first pulley (3046) located at one end of the arc-shaped outer sliding frame (304). A transmission belt 2 (30410) is rotatably connected between second pulleys (3047) located at both ends of the arc-shaped outer sliding frame (304). The transmission belt 2 (30410) is fixedly connected to the inner end of the arc-shaped inner sliding frame (305) through a connecting seat. The transmission belt 1 (3049) and the transmission belt 2 (30410) respectively pass through the first pulley (3046) and the second pulley (3047) on the upper and lower rotating shafts (3048), and the lower end surfaces of the upper layers of the transmission belt 1 (3049) and the transmission belt 2 (30410) are in contact with the upper surface of the pulley located above, and the lower end surfaces of the lower layers of the transmission belt 1 (3049) and the transmission belt 2 (30410) are in contact with the upper surface of the pulley located below, and the transmission ratio of the driven large gear (3044) to the driven small gear (3045) is 1:

2.

2. The device for detecting exhaust gas leakage according to claim 1, characterized in that: The angles of the arc-shaped inner sliding frame (305) and the arc-shaped outer sliding frame (304) are both 95-100 degrees, and the sliding direction of the arc-shaped inner sliding frame (305) is the same as the sliding direction of the arc-shaped outer sliding frame (304).

3. The device for detecting exhaust gas leakage according to claim 2, characterized in that: An arcuate outer rack (3041) is provided on opposite sides of the two arcuate outer sliding frames (304). The driving mechanism includes a U-shaped seat (302). The bottom of the U-shaped seat (302) is fixedly connected to the movable seat (5), and the movable seat (5) is arranged in the middle of the arcuate outer sliding frame (304). A driving motor (301) is fixedly connected to the U-shaped seat (302). The output end of the driving motor (301) passes through the U-shaped seat (302) and is fixedly connected to a driving gear (303). The driving gear (303) is respectively engaged with the arcuate outer racks (3041) on both sides.

4. The device for detecting exhaust gas leakage according to claim 1, characterized in that: The movable seat (5) includes an arc-shaped base (505), the bottom of the arc-shaped base (505) is movably connected to a plurality of magnetic blocks (509), a rotating shaft (501) is fixedly connected to a position away from the center of the top of the arc-shaped base (505), the rotating shaft (501) is connected to the fixed end of the rotating mechanism (207), and an arc-shaped groove (502) is provided on the arc-shaped base (505) and is respectively matched with two arc-shaped outer sliding frames (304), an arc-shaped inner rack (506) is fixedly connected in the arc-shaped groove (502), and the arc-shaped inner rack (506) is meshed with the driven large gear (3044).

5. The device for detecting exhaust gas leakage according to claim 4, characterized in that: T-shaped slots (507) are respectively provided on both sides of the arc-shaped inner rack (506); a T-shaped slider (30411) that slides with the T-shaped slot (507) is fixedly connected to the bottom of the arc-shaped outer sliding frame (304); an end of the arc-shaped outer sliding frame (304) that is away from the sliding direction of the arc-shaped inner sliding frame (305) is fixedly connected to a limiting plate (3042); the other end of the arc-shaped outer sliding frame (304) is fixedly connected to a sliding limit block 1 (3043); and a sliding limit block 2 (3051) that cooperates with the sliding limit block 1 (3043) is fixedly connected to the arc-shaped inner sliding frame (305).

6. The device for detecting exhaust gas leakage according to claim 2, characterized in that: The bottom of one end of the arc-shaped inner sliding frame (305) and the arc-shaped outer sliding frame (304) close to the sliding-out direction is provided with a magnetic support mechanism (307), the magnetic support mechanism (307) comprises a mounting hole, the inner end surface of the mounting hole is fixedly connected to a rod sleeve (3071), a telescopic rod (3072) is slidably connected inside the rod sleeve (3071), a magnetic seat (3074) is fixedly connected to the bottom of the telescopic rod (3072), a ball (3075) is rotatably connected inside the magnetic seat (3074), and a spring (3073) is commonly sleeved outside the rod sleeve (3071) and the telescopic rod (3072), and two ends of the spring (3073) are respectively against the inner end surface of the mounting hole and the magnetic seat (3074).

7. The device for detecting exhaust gas leakage according to claim 1, characterized in that: At least one sensing probe (504) for sensing obstacles is provided at one end of the two movable seats (5) that are away from each other. A second gas detection probe (401) is provided on the inspection mechanism (4). The second gas detection probe (401) is arranged on one side, both sides or the opposite end of the two movable seats (5).

8. A method for detecting exhaust gas leakage, comprising the device for detecting exhaust gas leakage according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, the moving device (2) controls the first steering gear (203) and the two second steering gears (205) to work in coordination, thereby enabling the two moving seats (5) to move on the outer wall of the exhaust gas pipe, and inspecting the sealing of the exhaust gas pipe through the inspection mechanism (4); S2. When the inspection mechanism (4) detects that the exhaust gas outside the exhaust pipe exceeds the standard, the moving device (2) stops moving, and the driving mechanism on the moving seat (5) where the inspection mechanism (4) is located rotates forward, driving the two arc-shaped outer sliding frames (304) to rotate 45-50 degrees toward each other. During this process, the arc-shaped inner sliding frame (305) is synchronously extended, thereby driving the gas detection probe (306) to rotate around the outer wall of the exhaust pipe for regular inspection and troubleshooting; S3, with the movable seat (5) in S2 as the support point, another movable seat (5) moves forward under the action of the movable device (2), and then pulls the movable seat (5) in S2 to move forward close to the exhaust pipe. At the same time, the driving mechanism cyclically reverses and rotates forward, and the outer wall of the exhaust pipe where the exhaust gas exceeds the standard is checked in detail, thereby narrowing the leakage range until the specific leakage location is found.

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