Device for detecting exhaust gas leakage and detection method

Abstract

The invention discloses equipment for detecting waste gas leakage and a detection method, and belongs to the field of sealing performance detection equipment. The device mainly comprises a moving device, the moving device comprises a first connecting seat and a second connecting seat, one end of the first connecting seat is fixedly connected with a first steering engine, the output end of the first steering engine is connected with one end of the second connecting seat, the other end of the first connecting seat and the other end of the second connecting seat are respectively connected with a second steering engine, and the second steering engines are fixedly connected with a fixed seat. The bottom of the fixed seat is rotatably connected with the movable seat through a slewing mechanism, the bottom of the movable seat is provided with a magnetic attraction block for being fixed with the waste gas pipeline, the movable seat is fixedly connected with at least one inspection mechanism, and the ends, away from each other, of the two movable seats are slidably connected with regular inspection mechanisms respectively. The device is simple in structure, achieves the quick preliminary detection of the sealing performance of a waste gas pipeline with a U-shaped fixing frame and a flange plate, achieves the regular detection of a suspected waste gas leakage position, and greatly improves the detection precision and detection efficiency.

Description

Technical Field

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

[0002] When seamless steel pipes are produced, the tube blanks usually need to be heated in a ring heating furnace. Due to impurities in the fuel or incomplete combustion, a large amount of waste gas will be generated during the heating process. The main components of the waste gas include carbon dioxide (CO 2 ) and water vapor, in addition, carbon monoxide (CO), sulfur dioxide (SO 2 )、NO X The waste gas is mainly sent to the purification device through pipelines for purification and treatment before being discharged. In the process of pipeline transportation of waste gas, it is necessary to ensure the effective sealing of the pipeline. If the waste gas leaks 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, wherein arc frame one and arc frame two are fixed on the surface of a gas pipeline by threaded rods, contact components are arranged inside the arc frame one and arc frame two, and 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, and the laser gas detector can move on the surface of the gas pipeline, so as to inspect and detect the gas pipeline, and avoid untimely discovery of gas leakage in the gas pipeline, and an inspection component is arranged 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 axial direction of the gas pipeline, so it can only perform preliminary inspection 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 gas pipelines 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, so the leakage detection device of the ring structure 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 cannot be used. Summary of the invention

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

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

[0007] Preferably, the fixed inspection mechanism includes two relatively arranged arc-shaped outer sliding frames, and a driving mechanism for driving the two arc-shaped outer sliding frames to slide synchronously toward each other or relative to each other is provided between the two arc-shaped outer sliding frames. 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 one end of the arc-shaped inner sliding frame close to the sliding-out 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-out 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, arc-shaped external racks are respectively provided on opposite sides of the two arc-shaped external sliding frames, the driving mechanism includes a U-shaped seat, the bottom of the U-shaped seat is fixedly connected to the moving seat, and the moving seat is arranged in the middle position of the arc-shaped external sliding frame, and a driving motor is fixedly connected to the U-shaped seat, and 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 arc-shaped external racks on both sides.

[0009] Preferably, the bottom of the arc-shaped outer sliding frame is rotatably connected to a plurality of rotating shafts arranged at equal intervals, and adjacent rotating shafts are staggered up and down, and each rotating shaft is fixedly connected to a first pulley and a second pulley at positions near both ends of each rotating shaft, and a driven pinion is fixedly connected to the rotating shaft located in the middle of the arc-shaped outer sliding frame, the driven pinion is arranged between the first pulley and the second pulley, the driven pinion meshes with the driven large gear through the intermediate gear, and the driven large gear is rotatably connected to the arc-shaped outer sliding frame through the driven shaft, a transmission belt 1 is rotatably connected between the first pulley coaxial with the driven pinion and the first pulley located at one end of the arc-shaped outer sliding frame, a transmission belt 2 is rotatably connected between the second pulleys located at both ends of the arc-shaped outer sliding frame, and the transmission belt 2 is fixedly connected to the inner end of the arc-shaped 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 arc-shaped grooves respectively matching with two arc-shaped outer sliding frames, an arc-shaped inner rack is fixedly connected in the arc-shaped groove, and the arc-shaped inner rack is meshed with the driven large gear.

[0012] Preferably, T-slots are provided on both sides of the arc-shaped inner rack, a T-slot sliding block slidably matched with the T-slot is fixedly connected to the bottom of the arc-shaped outer sliding frame, an 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 a sliding limit block 2 matched with the sliding limit block 1 is fixedly connected to the arc-shaped inner sliding frame.

[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 with a rod sleeve, a telescopic rod is slidably connected in the rod sleeve, a magnetic seat is fixedly connected to the bottom of the telescopic rod, a ball is rotatably connected in the magnetic seat, a spring is commonly sleeved on the outside of the rod sleeve and the telescopic rod, and two 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 adopts the above-mentioned device for detecting exhaust gas leakage, and comprises the following steps: S1, the moving device controls the first steering gear and the two second steering gears to work together, so that the two moving seats move on the outer wall of the exhaust gas pipe, and the exhaust gas pipe is inspected by the inspection mechanism; S2. When the inspection mechanism detects that the exhaust gas outside the exhaust pipe exceeds the standard, the moving device stops moving, and the driving mechanism on the moving seat 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; S3, with the moving seat in S2 as the support point, another 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 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 to be about 110° when it is retracted, so that the present invention can smoothly pass through the U-shaped fixing frame during inspection, which greatly improves the versatility of the equipment.

[0017] 2. The angles of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame in the regular 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 ends of the arc-shaped inner sliding frame and the arc-shaped outer sliding frame 4 that slide out are always tightly attached to the outer wall of the exhaust gas pipe. At the same time, the ball bearings can assist it in radial and axial movement in the exhaust gas pipe, thereby facilitating the regular inspection of exhaust gas leakage as the moving device moves forward outside the pipe wall.

[0018] 3. A driven large gear, a driven small gear, and a rotating shaft and pulleys arranged above and below are arranged in the arc-shaped outer sliding frame. The driven large gear can drive the corresponding two sets of transmission belts to transmit by meshing with the arc-shaped inner rack, wherein the lower end surfaces of the upper layers of the transmission belts 1 and 2 fit with the upper surfaces of the corresponding pulleys on the upper rotating shaft, and at the same time, the lower end surfaces of the lower layers of the transmission belts 1 and 2 fit 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 belts 1 and 2 fit with the lower surfaces of the corresponding pulleys on the upper rotating shaft, thereby ensuring that the transmission belts 1 and 2 are effectively transmitted along the arc-shaped structural trajectory, and the transmission belts do 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

[0019] Figure 1 This is a schematic diagram of the installation of the exhaust gas pipe; Figure 2 A reference diagram of the use state of the present invention on an exhaust gas pipe; Figure 3 A reference diagram of the present invention crossing over the U-shaped fixing frame; Figure 4 A reference diagram of the state of the present invention crossing over the flange; Figure 5 A state reference diagram for performing regular inspection on an exhaust gas pipeline according to the present invention; Figure 6 It is a structural schematic diagram of the present invention; Figure 7 It is a structural schematic diagram of the mobile seat; Figure 8 for Figure 7 A partial enlarged view of part A; Fig. 9 It is a schematic diagram of the bottom structure of the mobile seat; Fig.10 This is a schematic diagram of the structure when the scheduled inspection mechanism is closed; Fig.11 This is a schematic diagram of the structure of the scheduled inspection organization when it is expanded; Fig.12 It is a structural schematic diagram of the magnetic support mechanism; Fig.13 Schematic diagram of the coordination between the arc-shaped outer sliding frame and the arc-shaped inner sliding frame; Fig.14 is a schematic diagram of the bottom structure of the arc-shaped outer sliding frame; Fig.15 It is a schematic diagram of the installation of the first transmission belt and the second transmission belt in the arc-shaped outer sliding frame; Fig.16 It is a structural schematic diagram of the arc-shaped inner sliding frame; Fig.17 for Fig.13 A partial enlarged view of part B; Fig.18 for Fig.13 A partial enlarged view of part C in the middle; Fig.19 for Fig.14 A partial enlarged view of part D.

[0020] 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 steering gear; 204, second connecting seat; 205, second steering gear; 206, fixing seat; 207, rotating 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, limit plate; 3043, sliding limit 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; 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

[0021] The present invention will be further described below in conjunction with the accompanying drawings: The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Embodiment 1: like Figures 6 to 19As shown, a device for detecting exhaust gas leakage includes a mobile device 2, the mobile device 2 includes a first connecting seat 201 and a second connecting seat 204, the upper end of the first connecting seat 201 is fixedly connected with a first steering gear 203, 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, and the fixed seat 206 is connected to the rotating mechanism 207. The rotating end is fixedly connected, the fixed end of the rotating mechanism 207 is fixedly connected to the moving seat 5, and a magnetic block 509 for fixing to the exhaust gas pipe is provided at the bottom of the moving seat 5. The magnetic block 509 is preferably an electromagnetic suction cup. One or more inspection mechanisms 4 are fixedly connected to the moving 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 401 is provided on the inspection mechanism 4. The gas detection probe 401 can be set on one side or both sides of the moving seat 5 or on the opposite end of the two moving seats 5 as needed. The ends of the two moving seats 5 that are far away from each other are respectively slidably connected with the fixed inspection mechanism 3.

[0023] In this embodiment, a control box 202 is installed in the first connection seat 201, and 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 mobile device 2, the fixed inspection mechanism 3 and the patrol inspection mechanism 4 can be controlled to work together through the control box 202. The gas detection probe 2 401 is preferably arranged at the opposite end of the two mobile seats 5, and the gas detection probes 2 401 on the two mobile seats 5 are staggered. The gas detection probe 2 401 is used for large-scale detection of leakage of the exhaust gas pipe 1 on the one hand, and can cooperate with the fixed inspection mechanism 3 to perform small-scale fixed inspection on the pipe wall in contact with the mobile seat 5 on the other hand, thereby narrowing the scope of leakage investigation and improving the accuracy of sealing detection.

[0024] Embodiment 2: like Figures 10 to 15As shown, 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 arranged between the two arc-shaped outer sliding frames 304. The two arc-shaped outer sliding frames 304 are symmetrical with the axis of the power output shaft of the driving mechanism as the center. An arc-shaped inner sliding frame 305 is slidably connected to each arc-shaped outer sliding frame 304, and the sliding direction of the arc-shaped inner sliding frame 305 is the same as that of the arc-shaped outer sliding frame 304, that is, the sliding directions of the two groups of arc-shaped outer sliding frames 304 and the arc-shaped inner sliding frame 305 are opposite. 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.

[0025] An arcuate outer rack 3041 is respectively provided on one side opposite to the other of the two arcuate outer sliding frames 304. The driving mechanism comprises a U-shaped seat 302. The bottom of the U-shaped seat 302 is fixedly connected to the upper end surface of the moving seat 5. The moving 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 moving 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 moving 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 through the rotating shaft 503. As the driving gear 303 rotates forward or reversely, the two arc-shaped outer sliding frames 304 can be driven to slide toward each other or relative to each other.

[0026] like Fig.14 and Fig.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 both ends, and the first pulley 3046 and the second pulley 3047 are preferably synchronous pulleys, such as Fig.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, and 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.

[0027] like Fig.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 shaft 3048 respectively in sequence. 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 fit 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 fit 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 fit 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 belt does not rub against the moving seat 5.

[0028] like Figures 7 to 9As shown, the movable seat 5 includes an arc-shaped base 505, the shape of which is similar to the outer wall of the exhaust pipe 1, and a plurality of magnetic blocks 509 are movably connected to the bottom of the arc-shaped base 505, and the magnetic blocks 509 can adsorb the present invention on the outer wall of the exhaust pipe 1, and a rotating shaft 501 is fixedly connected to the end of the top of the arc-shaped base 505 away from the center, and the rotating shaft 501 is connected to the fixed end of the rotating mechanism 207, and the rotating end of the rotating mechanism 207 is connected to the fixed seat 206, and an arc-shaped groove 502 that matches the two arc-shaped outer sliding frames 304 respectively is opened at the position of the arc-shaped base 505 away from the rotating shaft 501, and 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, 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, so the structure is more compact and the transmission is more reliable.

[0029] In this embodiment, T-slots 507 are respectively provided on both sides of the arc-shaped inner rack 506, and an arc-shaped limit strip 508 is provided between the T-slot 507 and the arc-shaped inner rack 506. The cross section of the arc-shaped limit strip 508 is an inverted L-shaped structure, and the upper end surface of the arc-shaped limit 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 avoid interference between the transmission belt and the arc-shaped base 505. Fig.14 As shown, a T-shaped slider 30411 that slidably cooperates with the T-shaped slot 507 is fixedly connected to the bottom of the arc-shaped outer sliding frame 304, and the bottom of the arc-shaped outer sliding frame 304 is a hollow structure. One 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, and the other end of the arc-shaped outer sliding frame 304 is fixedly connected to a sliding limiting block 1 3043, and the arc-shaped inner sliding frame 305 is fixedly connected to a sliding limiting block 2 3051 that cooperates with the sliding limiting block 1 3043. At the same time, a mounting block is fixedly connected to the bottom of the end of the arc-shaped outer sliding frame 304 where the sliding limiting block 1 3043 is located.

[0030] 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 arranged on the mounting block, such as Fig.12As shown, the magnetic support mechanism 307 includes a mounting hole, a rod sleeve 3071 is fixedly connected to the inner end surface of the mounting hole, a telescopic rod 3072 is slidably connected in 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 in the magnetic seat 3074, and a spring 3073 is sleeved on the rod sleeve 3071 and the telescopic rod 3072, and the two ends of the spring 3073 are respectively 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 can ensure that the ends of the arc-shaped inner sliding frame 305 and the arc-shaped outer sliding frame 304 that slide out are always closely attached to the outer wall of the exhaust pipe 1, and at the same time, the ball 3075 can assist it to move radially and axially in the exhaust pipe 1, so as to facilitate the fixed inspection mechanism 3 to perform fixed inspection of exhaust gas leakage as the moving device 2 moves forward outside the pipe wall.

[0031] In this embodiment, one or more sensing probes 504 for sensing obstacles are provided at the ends of the two moving seats 5 that are far away from each other. The sensing probes 504 are connected to the control box 202. During the movement of the present invention, the sensing 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. 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, and specifically includes the following steps: S1. The two moving seats 5 are adsorbed on the outer wall of the exhaust pipe 1 through the magnetic suction block 509. The moving device 2 controls the first servo 203 and the two second servos 205 to work together through the control box 202, so that the two moving seats 5 move on the outer wall of the exhaust pipe, and the sealing of the exhaust pipe 1 is inspected by the inspection mechanism 4.

[0032] 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, and the front moving seat 5 is lifted. At the same time, the second steering gear 205 above the front moving seat 5 rotates, so that the axis of the arc-shaped 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, and the front moving seat 5 is placed on the exhaust pipe 1. At the same time, the magnetic block 509 at the bottom is powered on, so that the front moving seat 5 is adsorbed on the pipe 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 work together to realize the forward movement of the rear moving seat 5, completing the forward process of the present invention. When it is necessary to retreat, the principle is the same as above and will not be repeated.

[0033] When the pipeline turns, as long as the moving seat 5 responsible for movement 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.

[0034] like Figure 3 As shown, by repeating the above steps, the present invention can smoothly pass through the U-shaped fixing frame 101.

[0035] like Figure 4 As shown, when the sensing probe 504 on the front moving seat 5 senses obstacles such as the flange 102, the first steering gear 203 is started with the front moving seat 5 as the support point, and the rear moving seat 5 is lifted. Then the rotary mechanism 207 above the front moving seat 5 rotates, driving the entire moving device 2 to rotate and pass over the obstacle. In this process, the second steering gear 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 steering gear 203 and the second steering gear 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 the moving seat 5 is used as the support point. The above actions are repeated to complete the action of passing over obstacles such as the flange 102.

[0036] 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 seat 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° toward each other in the corresponding T-slots 507. During the sliding process of the arc-shaped outer sliding frame 304, the driven large gear 3044 at the bottom of the arc-shaped outer sliding frame 304 is meshed with the arc-shaped inner rack 506, so that the driven large gear 3044 rotates, and the driven large gear 3044 rotates. 044 drives the transfer gear to accelerate, 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 gas pipe 1 to its bottom, and performs regular inspection on the outer wall during the rotation.

[0037] S3. With the moving seat 5 in S2 as a supporting point, another moving seat 5 moves forward under the action of the moving device 2, and the fixed inspection mechanism 3 on this moving seat 5 does not extend. Then, the moving seat 5 in S2 is pulled 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, so as to narrow the leakage range until the specific leakage location is found.

[0038] Finally, although this specification is described according to 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 a mobile seat (5) via a slewing mechanism (207); a magnetic suction block (509) for fixing to an exhaust gas pipe is provided at the bottom of the mobile seat (5); at least one patrol 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 fixed inspection mechanisms (3).

2. The device for detecting exhaust gas leakage according to claim 1, characterized in that: The fixed inspection mechanism (3) comprises two arc-shaped outer sliding frames (304) arranged opposite to each other, a driving mechanism for driving the two arc-shaped outer sliding frames (304) to slide synchronously towards 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 inside each arc-shaped outer sliding frame (304), 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 at one end of the arc-shaped outer sliding frame (304) away from the sliding direction close to the end of the movable seat (5), the angle between the arc-shaped inner sliding frame (305) and the arc-shaped outer sliding frame (304) is 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: The two arc-shaped outer sliding frames (304) are respectively provided with arc-shaped outer racks (3041) on opposite sides thereof. The driving mechanism comprises a U-shaped seat (302). The bottom of the U-shaped seat (302) is fixedly connected to the moving seat (5), and the moving seat (5) is arranged at the middle position of the arc-shaped 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 meshed with the arc-shaped outer racks (3041) on both sides.

4. The device for detecting exhaust gas leakage according to claim 3, characterized in that: 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 in the upper and lower directions. Each rotating shaft (3048) is fixedly connected to a first pulley (3046) and a second pulley (3047) at positions near both ends thereof, and 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 rotating shaft (3048) by a transfer gear. The driven large gear (3044) is meshed with the driven large gear (3044), which is rotationally connected to the arc-shaped outer sliding frame (304) via a driven shaft; a transmission belt 1 (3049) is rotationally connected between a first pulley (3046) coaxial with the driven small gear (3045) and a first pulley (3046) located at one end of the arc-shaped outer sliding frame (304); a transmission belt 2 (30410) is rotationally connected between 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) via a connecting seat.

5. The device for detecting exhaust gas leakage according to claim 4, characterized in that: 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.

6. The device for detecting exhaust gas leakage according to claim 4, characterized in that: The movable seat (5) comprises 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 a fixed end of a rotating mechanism (207), and an arc-shaped groove (502) is formed 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 a driven large gear (3044).

7. The device for detecting exhaust gas leakage according to claim 6, characterized in that: T-shaped grooves (507) are respectively provided on both sides of the arc-shaped inner rack (506); a T-shaped sliding block (30411) slidably matched with the T-shaped groove (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) 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 limiting block 1 (3043); and a sliding limiting block 2 (3051) matched with the sliding limiting block 1 (3043) is fixedly connected to the arc-shaped inner sliding frame (305).

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

9. 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, and 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 of the movable seat (5) or at the opposite end of the two movable seats (5).

10. A method for detecting exhaust gas leakage, comprising the device for detecting exhaust gas leakage according to any one of claims 2 to 9, 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 performance of the exhaust gas pipe through the inspection mechanism (4); S2. When the inspection mechanism (4) detects that the exhaust gas outside the exhaust gas 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 towards each other. During this process, the arc-shaped inner sliding frame (305) extends synchronously, thereby driving the gas detection probe 1 (306) to rotate around the outer wall of the exhaust gas pipe for regular inspection and troubleshooting; S3, with the moving seat (5) in S2 as a support point, another moving seat (5) moves forward under the action of the moving device (2), 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 to conduct a detailed inspection of the outer wall of the exhaust pipe where the exhaust gas exceeds the standard, thereby narrowing the leakage range until the specific leakage location is found.

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