Self-adaptive stain cleaning mechanism for inner wall of natural gas pipeline

Abstract

The utility model discloses a self-adaptive natural gas pipeline inner wall stain cleaning mechanism which comprises a movable cleaning body capable of moving along the pipeline inner wall, the movable cleaning body comprises a shell, a cleaning device and a walking driving device, the cleaning device and the walking driving device are arranged on the shell, and the cleaning device which can be adjusted in the radial direction is arranged at the front end of the shell. A walking driving device is arranged on the outer wall of the shell, a first flange plate supporting base used for supporting an adjustable cleaning device is arranged at the front end of the shell, and the bottom of the cleaning device is fixedly connected to the outer disc face of the first flange plate supporting base through bolts. Third flange plate supporting seats are arranged between the first flange plate supporting seats and the rear end of the shell, and two walking driving devices which are symmetrical to each other are arranged on the same side wall of each third flange plate supporting seat in a spaced mode. The pipeline inner wall cleaning device can achieve automatic cleaning of the inner wall of a pipeline, can achieve automatic adjustment according to the diameter of the pipeline in the cleaning process and accordingly can adapt to cleaning work of pipelines with different calibers.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline cleaning equipment, and in particular relates to a stain cleaning mechanism for the inner wall of a self-adaptive natural gas pipeline. Background Art

[0002] With the popularization of clean energy, the application of natural gas transportation pipelines has reached a new height. The large-scale use of natural gas pipelines has also brought us new problems, that is, the problem of cleaning inside the pipeline. The natural gas pipeline is large in scale. After long-term use, the rust and stains accumulated inside the pipeline need to be cleaned to avoid blocking the pipeline and affecting the transportation efficiency. In more serious cases, over-gas leakage accidents will occur, seriously affecting people's lives and property safety and causing huge pollution to the environment. Therefore, safe operation and maintenance of pipelines are very important. At present, there are two traditional cleaning and maintenance methods, both of which have certain problems and disadvantages. These two methods are gyro cleaning method (pipe cleaning ball method) and gas blasting impact method; the gas blasting impact method is to supply gas to the purge pipeline through a temporary gas supply pipe, increase the pressure until the blasting pad blasts, and the compressed air is blown out from the blasting point. Repeat the above blasting and purging steps until no dust and external impurities can be detected inside the pipeline. This method also has problems such as unclean cleaning and complicated cleaning process, and there are safety issues; gyro cleaning is a more effective way to clean debris, foreign matter and water accumulated in the pipeline, especially for larger foreign matter. It consists of a transmitter, a catcher and gyroscopes of various specifications. The transmitter pushes the gyroscope out through clean and dry compressed air, and the receiver collects the gyroscope and foreign objects in a sack. The biggest problem with this method is that stubborn stains such as rust are difficult to clean, and the operation is complicated. The pipe cleaning ball method with the same principle requires a large amount of high-pressure water flow to impact the foam cotton, which will cause a large amount of water resources to be wasted; for this reason, although the above method can quickly clean the rust of the natural gas pipeline, it is still unable to adjust and position it in time according to the shape and defects of the pipeline, and it is difficult to achieve continuous cleaning capabilities.

[0003] In view of the problems existing in the prior art, it is of great technical and economic value to study an adaptive natural gas pipeline inner wall stain cleaning mechanism to effectively solve the problems of safer and more convenient pipeline cleaning and accurate defect detection methods, so as to improve the pipeline stain cleaning effect. Utility Model Content

[0004] The purpose of the utility model is to provide a stain cleaning mechanism that is adaptive to the inner wall of a natural gas pipeline. The utility model can realize automatic cleaning and defect detection of the inner wall of the pipeline. During the cleaning process, it can realize automatic adjustment according to the change of the pipeline diameter, so as to adapt to the cleaning of pipelines with different diameters. In order to achieve the above purpose, the utility model adopts the following technical effects:

[0005] According to one aspect of the utility model, the utility model provides a stain cleaning mechanism for the inner wall of an adaptive natural gas pipeline, the pipeline cleaning robot includes a mobile cleaning body capable of moving along the inner wall of the pipeline, the mobile cleaning body includes a shell and a cleaning device and a walking drive device arranged on the shell, a cleaning device adjustable in a radial direction is arranged on the front end of the shell, a walking drive device is arranged on the outer wall of the shell, a first flange support seat for supporting an adjustable cleaning device is arranged at the front end of the shell, the bottom of the cleaning device is fixedly connected to the outer disk surface of the first flange support seat by bolts, a third flange support seat is arranged between the first flange support seat and the rear end of the shell, and two mutually symmetrical walking drive devices are arranged at intervals along the same side wall of each third flange support seat.

[0006] The above scheme is further preferred that the mobile cleaning body also includes a leakage magnetic detection device arranged at the rear end of the shell, a walking drive device is arranged on the outer wall of the shell between the cleaning device and the leakage magnetic detection device, and a second flange support seat for supporting the leakage magnetic detection device is arranged at the rear end of the shell, and the bottom of the leakage magnetic detection device is fixedly connected to the outer disk surface of the second flange support seat by bolts.

[0007] Preferably, in the above scheme, one or more equally spaced third flange support seats are arranged on the outer wall of the shell between the first flange support seat and the second flange support seat, and two mutually symmetrical travel drive devices are spaced apart along the same side wall of each third flange support seat.

[0008] The above scheme is preferred, wherein the cleaning device includes a cleaning brush body, a rotating cleaning motor, a front fixed disk and a brush body supporting turntable, a front fixed disk is arranged at the front end of the shell, the fixed end of the rotating cleaning motor is fixed to the center of the front end inside the shell through the front fixed disk, the output shaft of the rotating cleaning motor is extended along the center of the shell toward the front end outer axis direction after the front fixed disk is arranged, a brush body supporting turntable is arranged outside the front fixed disk and located on the output shaft of the rotating cleaning motor through a first bearing sleeve, a plurality of radial support arms extending radially outward are arranged on the circumference of the brush body supporting turntable, and the free ends of the cleaning brush along the radial support arms surround the circumferential outer periphery of the fixed brush body supporting turntable.

[0009] The above scheme is preferred, wherein the cleaning brush body comprises a brush head and a brush head supporting ring, the brush heads are evenly arranged on the outer circumference of the brush head supporting ring, the brush head supporting ring is composed of a plurality of arc-shaped blocks which are close to each other end to end, the brush heads are evenly arranged on the arc-shaped outer wall of the arc-shaped block, one end of the radial support arm is fixed on the circumference of the brush body supporting turntable, and the free end of the support arm is fixedly connected to the arc-shaped inner wall of the arc-shaped block.

[0010] Preferably, the support arm is a telescopic arm, and the telescopic arm is an electric push rod.

[0011] The support arm is composed of a plurality of telescopic rods connected in a sleeve, and a variable diameter drive motor is coaxially arranged at the center of the outer side of the brush body support turntable. A variable diameter drive disk close to the outer side wall of the brush body support turntable 203 is provided on the output shaft of the variable diameter drive motor through a bearing sleeve, and a variable diameter drive rod corresponding to each support arm is extended along the tangential direction of the variable diameter drive disk, and the free end of the variable diameter drive rod is transmission-connected to the end of the support arm.

[0012] Preferably, the above scheme is provided with a driving connecting rod at the free end of the variable diameter driving rod, one end of the driving connecting rod is rotatably connected to the free end of the variable diameter driving rod, a fixed support sleeve is sleeved on the end of the support arm, and the other end of the driving connecting rod is rotatably connected to the outer wall of the fixed support sleeve.

[0013] The above scheme preferably has a plurality of concave grooves along the axial direction provided on the surface of the shell between the inner disk surface of the first flange support seat and the disk surface of the second flange support seat, a screw rod located in each concave groove is provided between the inner disk surface of the first flange support seat and the inner disk surface of the second flange support seat, a screw rod motor connected to each screw rod for transmission is fixed in the concave groove on one side of the outer disk surface of the second flange support seat, at least two mutually symmetrical travel drive devices are provided on the edge of the inner disk surface of the first flange support seat, the edge of the inner disk surface of the second flange support seat and the edge of the disk surface of the third flange support seat close to the second flange support seat, each travel drive device is located on the same vertical plane as the screw rod on the corresponding side and is inclined toward the direction of the screw rod, each travel drive device is transmission connected to the slider on the screw rod, and the center of the slider is sleeved on the screw rod through a threaded hole.

[0014] The above scheme is preferred, wherein the walking drive device includes a walking support seat, a steering wheel bracket, a steering wheel and a suspension support spring, and at least two mutually symmetrical walking support seats are respectively arranged on the inner disk edge of the first flange support seat, the inner disk edge of the second flange support seat, and the disk edge of the third flange support seat close to the second flange support seat; each walking support seat is rotatably connected to a steering wheel bracket inclined in the direction of the screw rod, the steering wheel is arranged on the free end of the steering wheel bracket, and the outer wall of the steering wheel bracket is connected to a slider on the screw rod through a suspension support spring.

[0015] The above scheme is preferred, in which a circular guide support structure is arranged around the outer periphery of the disk surface of the second flange support seat on the side away from the leakage magnetic flux detection device, and the diameter height of the circular guide support structure is greater than the diameter height of the eddy current leakage magnetic flux detection coil; the guide support structure includes a support spring, a guide support ring and a ball, and the guide support ring is arranged around the outer periphery of the disk surface of the second flange support seat on the side away from the circular detection support frame, and the guide support ring is composed of a plurality of arc-shaped guide blocks which are close to each other end to end, and the inner ring wall of each arc-shaped guide block is connected to the outer wall of the second flange support seat through a radially arranged support spring 501, and a plurality of through holes are evenly arranged on the arc-shaped outer wall of each arc-shaped guide block, and a ball protruding from the outside of the arc-shaped guide block is rotatably arranged in each through hole.

[0016] The utility model adopts the above technical solution, and the utility model has the following technical effects:

[0017] The utility model can efficiently clean the inner wall of the pipeline and detect damage defects on the inner wall of the pipeline, realize automatic cleaning and defect detection, ensure a high degree of cleanliness while saving manpower and material resources, so as to timely replace the natural gas pipeline section with hidden dangers, prevent the occurrence of natural gas leakage accidents, and reduce the existing safety hazards; the cleaning mechanism and the walking mechanism are designed as adjustable distance structures, which can adapt to the changes in the diameters of pipelines of different calibers, and can realize automatic adjustment for small size changes during the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a stain cleaning mechanism for the inner wall of a natural gas pipeline that is self-adaptive in the present invention;

[0019] Figure 2 It is a schematic diagram of the exploded structure of a stain cleaning mechanism for the inner wall of a natural gas pipeline that is self-adaptive in the utility model;

[0020] Figure 3 It is a partial structural schematic diagram of a stain cleaning mechanism for the inner wall of a natural gas pipeline that is adaptive to the present invention;

[0021] Figure 4 It is a cross-sectional structural schematic diagram of a stain cleaning mechanism for the inner wall of a natural gas pipeline that is adaptive to the present invention;

[0022] Figure 5 It is a structural schematic diagram of the cleaning device of the utility model;

[0023] Figure 6 This is a schematic diagram of the installation structure of the cleaning brush body of the utility model;

[0024] Figure 7 It is a schematic diagram of the installation structure of the magnetic flux leakage detection device of the utility model;

[0025] In the accompanying drawings, a mobile cleaning cleaning body 1, a shell 10, a concave notch 11, a cleaning device 20, a first flange support seat 21, a travel drive device 30, a third flange support seat 31, a screw 32, a screw motor 33, a slider 34, a magnetic flux leakage detection device 40, a second flange support seat 41, an annular guide support structure 50, a cleaning brush body 200, a rotating cleaning motor 201, a front fixed disk 202, a brush body support turntable 203, a radial support arm 204, a brush head 2001, a brush head support ring 2002, an arc block 2002a, a variable diameter drive motor 2003, a variable diameter drive disk 2004, a variable diameter drive rod 2005, a drive connecting rod 2006, a fixed support sleeve 2007, and a sealing cover 2008;

[0026] Walking support seat 300, steering wheel bracket 301, steering wheel 302, suspension support spring 303, annular detection support frame 400, eddy current leakage magnetic detection coil 401, support spring 500, guide support ring 501, ball 502, through hole 503, arc guide block 5010. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling readers to have a thorough understanding of one or more aspects of the utility model, and these aspects of the utility model can be realized even without these specific details.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to the utility model, a stain cleaning mechanism for the inner wall of a natural gas pipeline is adaptively provided. The stain cleaning mechanism includes a mobile cleaning body 1 that can move along the inner wall of the pipeline. The mobile cleaning body 1 includes a shell 10 and a cleaning device 20 and a travel drive device 30 arranged on the shell 10. The cleaning device 20 adjustable in the radial direction is arranged on the front end of the shell 10, and the travel drive device 30 is arranged on the outer wall of the shell 10. The mobile cleaning body 1 also includes a leakage magnetic detection device 40 arranged at the rear end of the shell 10. The shell 10 is coaxially arranged with the pipeline in the pipeline, and an adjustable cleaning device 20 is arranged at the front end of the shell 10. A leakage magnetic detection device 3 for detecting the inner wall of the pipeline is arranged on the outer wall of the rear end of the shell 10. The travel drive device 30 is arranged on the outer wall of the shell 10 between the cleaning device 20 and the leakage magnetic detection device 40. A first flange support seat 21 for supporting the adjustable cleaning device 20 is arranged at the front end of the shell 10, and a first flange support seat 21 for supporting the leakage magnetic detection device 4 is arranged at the rear end of the shell 10. 0, the bottom of the cleaning device 20 is fixedly connected to the outer disk surface of the first flange support seat 21 by bolts, the bottom of the leakage magnetic detection device 30 is fixedly connected to the outer disk surface of the second flange support seat 40 by bolts, one or more equally spaced third flange support seats 31 are arranged on the outer wall of the shell 10 between the first flange support seat 21 and the second flange support seat 41, and two mutually symmetrical walking drive devices 30 are arranged at intervals along the same side wall of each third flange support seat 31, the shell 10 is composed of multiple sections of cylinders and are connected in series with each other through the third flange support seats 31, the walking drive device 30 moves on the inner wall of the pipeline and drives the shell 10 of the mobile cleaning cleaning body 1 to move in the pipeline, the cleaning device 20 is used at the front end of the shell 10 to effectively contact and clean the inner wall of the pipeline, and the leakage magnetic detection device 3 is used at the rear end of the shell 10 to detect the corrosion and scratches on the inner wall of the pipeline, thereby realizing the detection of damage defects on the inner wall of the pipeline.

[0029] In the present utility model, if Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the cleaning device 20 includes a cleaning brush body 200, a rotating cleaning motor 201, a front fixed disk 202 and a brush body supporting turntable 203. The front fixed disk 202 is arranged at the front end of the housing 10. The fixed end of the rotating cleaning motor 201 is fixed to the center of the front end of the housing 10 through the front fixed disk 202. The output shaft of the rotating cleaning motor 201 extends out of the front fixed disk 202 along the center of the housing 10 toward the front end of the external axis direction. The front fixed disk 202 is arranged behind the front fixed disk 202. The bearing sleeve is provided with a brush body supporting turntable 203, and a plurality of radial support arms 204 extending radially outward are provided on the circumference of the brush body supporting turntable 203. The free ends of the radial support arms 204 of the cleaning brush body 200 surround the circumference of the fixed brush body supporting turntable 203, and the output shaft sleeve of the rotating cleaning motor 201 is provided with the brush body supporting turntable 203. When the rotating cleaning motor 201 drives the brush body supporting turntable 203, the cleaning brush body 200 on the brush body supporting turntable 203 rotates accordingly to clean the inner wall of the pipeline, thereby removing rust or dirt on the inner wall of the pipeline.

[0030] As an embodiment of the present utility model, Figure 5 and Figure 6 As shown, the cleaning brush body 200 includes a brush head 2001 and a brush head supporting ring 2002, the brush head 2001 is made of hair, brown, plastic wire or metal wire (steel wire), and the brush head 2001 is evenly arranged on the outer circumference of the brush head supporting ring 2002, the brush head supporting ring 2002 is composed of a plurality of arc blocks 2002a close to each other at the head and tail, and the plurality of arc blocks 2002a close to each other at the head and tail to form a ring form the brush head supporting ring 2002, and the brush head 201 is evenly arranged on the arc outer wall of each arc block 2002a, one end of the radial support arm 204 is fixed on the circumference of the brush body support turntable 203, and the support arm 2 The free end of 04 is fixedly connected to the arc-shaped inner wall of the arc block 2002a, and the support arm 204 is a telescopic arm, which is an electric push rod. The rotating cleaning motor 201 drives the support arm 204 on the brush body support turntable 203 to rotate during the cleaning process, and the cleaning brush body 200 is pushed to move in the radial direction by the electric push rod. That is to say, each arc block 2002a is pushed by the electric push rod and moves back and forth in the radial direction. The circumference formed by each arc block 2002a changes along the radial direction of the pipeline, thereby adjusting the diameter of the entire cleaning brush body 200 inside the pipeline, so that the cleaning brush body 200 can adapt to the inner wall cleaning of pipelines with different diameters.

[0031] As the best embodiment of the utility model, Figure 5 and Figure 6As shown, the support arm 204 is composed of a plurality of telescopic rods connected in a sleeve, a variable diameter driving motor 2003 is coaxially arranged at the center of the outer side of the brush body supporting turntable 203, a variable diameter driving disk 2004 close to the outer side wall of the brush body supporting turntable 203 is arranged on the output shaft of the variable diameter driving motor 2003 through a bearing sleeve, and a variable diameter driving rod 2005 corresponding to each support arm 204 is extended along the tangential direction of the variable diameter driving disk 2004, the free end of the variable diameter driving rod 2005 is drivingly connected to the end of the support arm 204, a driving connecting rod 2006 is arranged at the free end of the variable diameter driving rod 2005, one end of the driving connecting rod 2006 is rotatably connected to the free end of the variable diameter driving rod 2005, a fixed supporting sleeve 2007 is sleeved at the end of the support arm 204, and the other end of the driving connecting rod 2006 is rotatably connected to the outer wall of the fixed supporting sleeve 2007, and the variable diameter driving motor 203 A sealing cover 2008 is provided on the outside to prevent stains from damaging the variable diameter drive motor 2003 and the rotating cleaning motor 201 during the cleaning process; during the rotation of the entire cleaning brush body 200 driven by the rotating cleaning motor 201, the variable diameter drive motor 2003, the support arm 204, the variable diameter drive disk 2004 and the variable diameter drive rod 205 are driven to rotate together by driving the brush body supporting turntable 203. At this time, the output shaft of the variable diameter drive motor 2003 is also driving the variable diameter drive disk 2004 to rotate, so that the variable diameter drive disk 2004 drives the variable diameter drive rod 2005 to rotate. During the rotation, the free end of the support arm 204 composed of a plurality of telescopic rods is pushed by the driving connecting rod 206, so that the support arm 204 is extended radially outward or contracted radially inward, and the arc block 2002 is driven to move radially outward or radially inward, so that the cleaning brush body 200 can be changed in diameter to adapt to the inner wall cleaning of different pipe diameters.

[0032] In the present utility model, if Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a plurality of concave notches 11 are provided on the surface of the housing 10 between the inner disk surface of the first flange support seat 21 and the disk surface of the second flange support seat 41 along the axial direction, a screw rod 32 is provided between the inner disk surface of the first flange support seat 21 and the inner disk surface of the second flange support seat 41, and a screw motor 33 connected to each screw rod 32 is fixed in the concave notch 11 on the outer disk surface side of the second flange support seat 41, one end of the screw rod 32 is rotatably connected to the first flange support seat 21, and the other end of the screw rod 32 passes through the third flange support seat 31 in sequence from the one side of the first flange support seat 21 and is connected to the screw motor 33 on the outer disk surface side of the second flange support seat 41, on the inner disk surface edge of the first flange support seat 21 and the second flange support seat 41 At least two symmetrical walking drive devices 30 are respectively arranged on the inner disk edge and the disk edge of the third flange support seat 31 on the side close to the second flange support seat 41. Each walking drive device 30 and the screw rod 32 on the corresponding side are located on the same vertical plane and are inclined toward the screw rod 32. Each walking drive device 30 is transmission connected with the slider 34 on the screw rod 32. The center of the slider 34 is sleeved on the screw rod 32 through a threaded hole. When the screw motor 34 rotates, the screw rod 32 is driven to rotate. When the slider 34 moves on the screw rod 32, the slider 34 drives the walking drive device 30 to swing in the radial direction between the inner wall of the pipe and the outer wall of the shell 10, thereby adjusting the contact pressure between the walking drive device 30 and the inner wall of the pipe, so that the walking drive device 30 can move and walk close to the inner wall of the pipe.

[0033] In the present utility model, if Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the walking drive device 30 includes a walking support seat 300, a steering wheel bracket 301, a steering wheel 302 and a suspension support spring 303. At least two mutually symmetrical walking support seats 300 are respectively arranged on the inner disk edge of the first flange support seat 21, the inner disk edge of the second flange support seat 41 and the disk edge of the third flange support seat 31 on the side close to the second flange support seat 41. Each walking support seat 300 is rotatably connected with a steering wheel bracket 301 inclined to the direction of the screw rod. The steering wheel 302 is arranged on the free end of the steering wheel bracket 301. The outer wall of the steering wheel bracket 301 is connected to the slider 34 on the screw rod 32 through the suspension support spring 303. When the steering gear on the steering wheel 302 rotates, the steering wheel 302 drives the housing 10 to move along the inner wall of the pipeline during the rolling process. By starting the screw motor 33 to rotate When the slider 34 moves on the screw rod 32, the slider 34 drives the steering wheel bracket 301 to swing in the radial direction between the inner wall of the pipe and the outer wall of the shell 10 through the suspension support spring 303, thereby adjusting the distance and contact pressure between the steering wheel 302 and the inner wall of the pipe, so that the steering wheel 302 can roll closely on the inner wall of the pipe and drive the shell 10 to move along the inner wall of the pipe. During the movement of the shell 10 along the inner wall of the pipe, the steering wheel 302 can be continuously buffered and squeezed against the inner wall of the pipe under the support of the suspension support spring 303 during the rolling process; the steering wheel 302 adopts a steering gear tire to provide good grip and traction, ensuring the stable walking of the cleaning mechanism during the cleaning process, so that the cleaning mechanism can move and clean in the pipe, thereby effectively cleaning the pollutants in the pipe and ensuring the smooth and clean pipeline.

[0034] In the present utility model, if Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a circular guide support structure 50 is arranged around the outer periphery of the disk surface of the second flange support seat 41 on the side away from the leakage magnetic detection device 40, and the leakage magnetic detection device 40 includes a circular detection support frame 400 arranged on the outer periphery of the outer disk surface of the second flange support seat 41, and a plurality of eddy current leakage magnetic detection coils 401 are arranged at equal intervals on the circumference of the circular detection support frame 400, and the diameter height of the circular guide support structure 50 is greater than the diameter height of the eddy current leakage magnetic detection coil 401; the guide support structure 50 includes a support spring 500, a guide support ring 501 and a ball 502, and the guide support ring 501 is arranged around the outer periphery of the disk surface of the second flange support seat 41 on the side away from the circular detection support frame 400, and the inner ring wall of the guide support ring 501 is connected to the outer wall of the second flange support seat 41 through a radially arranged support spring 500, and a through hole 503 is hollowed out on the circumferential outer wall of the guide support ring 501, and a through hole 503 is rotated in the through hole 503 A ball 502 protruding from the outside of the guide support ring 501 is dynamically provided, and the diameter height of the guide support ring 501 is greater than the height of the eddy current leakage magnetic detection coil 401. When the steering wheel 302 is driven by the steering gear, the steering wheel 302 drives the shell 10 to move along the inner wall of the pipeline during the rolling process on the inner wall of the pipeline. At this time, the ball 502 outside the guide support ring 501 contacts and squeezes the inner wall of the pipeline, which can start the guiding and supporting function of the shell 10 during the movement, thereby improving the stability of the cleaning mechanism during the movement, reducing the fluctuation of the leakage magnetic detection of the inner wall of the pipeline, and improving the accuracy of the detection; a pressure sensor is provided in the ball 502, and the variable diameter drive motor 2003 is started according to the pressure on the ball 502, driving the variable diameter drive disk 2004 and the variable diameter drive rod 2005 to rotate together, so that the support arm 204 extends radially outward or contracts radially inward, driving the arc block 2002 to move radially outward or radially inward, thereby realizing the radial distance adjustment of the cleaning brush body 200. When the shell 10 is moving, the eddy current magnetic flux leakage detection coil 401 on the periphery of the annular detection support frame 400 performs magnetic flux leakage detection on the inner wall of the pipeline to obtain the defect data of the inner wall of the pipeline. When the cleaning mechanism is moving forward, the eddy current magnetic flux leakage detection coil 401, as a magnetic flux leakage module, will detect the inner wall of the pipeline for leaks. When there is a defect in the inner wall of the pipeline at the position of the eddy current magnetic flux leakage detection coil 401, the induced voltage of the coil will change, thereby changing the induced voltage of the induction coil, thereby realizing the detection of defects, and transmitting the detected inner wall defect data to the remote data processing platform through the Lora communication module. The data processing platform will analyze the data to obtain what type of defects exist in the pipeline at what position, and the human can take countermeasures to the defects in the pipeline according to the feedback results of the platform.

[0035] As the best embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 and Figure 4 and Figure 7 As shown, a brushless drive motor (not shown) for driving the annular detection support frame 400 to rotate is arranged in the center of the outer disk surface of the second flange support seat 41. The output shaft of the brushless drive motor is connected to the annular detection support frame 400 through a bearing sleeve. The brushless drive motor drives the annular detection support frame 400 and the eddy current leakage magnetic detection coil 401 to rotate to detect defects at various positions on the inner wall of the pipeline. The guide support ring 501 is composed of a plurality of arc-shaped guide blocks 5010 that are close to each other end to end. The guide support ring is composed of a plurality of arc-shaped guide blocks 5010 that are close to each other end to end to form a circular ring. 501, the inner ring wall of each arc-shaped guide block 5010 is connected to the outer wall of the second flange support seat 41 through a radially arranged support spring 501, and a plurality of through holes 503 are evenly arranged on the arc-shaped outer wall of each arc-shaped guide block 5010, and a ball 502 protruding from the outside of the arc-shaped guide block 5010 is rotatably arranged in each through hole 503, and the inner wall of the pipe is squeezed by the support ball 502 on the arc-shaped guide block 5010, and the ball 502 contacts and squeezes the inner wall of the pipe so that the shell 10 is guided and supported and moves stably in the pipe, and the guiding and supporting function of the shell 10 can be started during the movement.

[0036] In the present utility model, combined with Figures 1 to 7As shown, when the cleaning mechanism is placed in the pipeline for cleaning and defect detection, the cleaning device 20, the travel drive device 30 and the magnetic flux leakage detection device 40 are placed in the pipeline in sequence. According to the size of the inner diameter of the pipeline, when the magnetic flux leakage detection device 40 is placed, each arc-shaped guide block 5010 is first squeezed so that each arc-shaped guide block 5010 is squeezed and placed in the pipeline in sequence, so that each arc-shaped guide block 5010 can adapt to the detection of pipelines with different diameters in the pipeline, and can squeeze the inner wall of the pipeline through the support ball 502 on the arc-shaped guide block 5010, and then the arc-shaped guide block 5010 is started. When the moving screw motor 33 rotates to move the slider 34 on the screw 32, the slider 34 drives the steering wheel bracket 301 to swing in the radial direction between the inner wall of the pipeline and the outer wall of the shell 10 through the suspension support spring 303, thereby adjusting the distance and contact pressure between the steering wheel 302 and the inner wall of the pipeline, so that the steering wheel 302 can be closely attached to the inner wall of the pipeline. According to the inner diameter of the pipeline, the variable diameter drive motor 2003 is started to drive the variable diameter drive disk 2004 and the variable diameter drive rod 2005 to rotate together, so that the support arm 204 extends radially outward or contracts radially inward. , driving the arc block 2002 to move radially outward or radially inward, thereby adjusting the radial distance of the cleaning brush body 200, so that the brush head 2001 on the periphery of the arc block 2002 contacts and presses against the inner wall of the pipe, so that the cleaning brush body 200 changes its diameter to adapt to the cleaning of the inner wall of pipes with different diameters, and then starting the rotary cleaning motor 201 to drive the brush head 2001 to rotate to clean the inner wall of the pipe, and at the same time, by starting the steering gear on the steering wheel 302 to rotate, the supporting spring 500 changes its diameter and moves in the radial direction to clean the entire inner wall of the pipe, When the steering wheel 302 drives the shell 10 to move along the inner wall of the pipeline during rolling, the eddy current leakage magnetic detection coil 401 arranged on the annular detection support frame 400 performs leakage magnetic detection on the inner wall of the pipeline to obtain defect data of the inner wall of the pipeline, and the ball 502 contacts and squeezes the inner wall of the pipeline to guide and support the shell 10 and ensure stable movement in the pipeline, which can start the guiding and supporting function of the shell 10 during movement, reduce the shaking of the shell and the leakage magnetic detection device 40, achieve stable movement along the inner wall of the pipeline, and improve the stability of the cleaning mechanism during movement.

[0037] The above is only a preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications should also be regarded as the scope of protection of the utility model.

Claims

1. A stain cleaning mechanism for the inner wall of a natural gas pipeline, characterized in that: The stain cleaning mechanism comprises a mobile cleaning body (1) capable of moving along the inner wall of a pipeline, the mobile cleaning body (1) comprising a shell (10), a cleaning device (20) and a travel drive device (30) arranged in the shell (10), and a magnetic flux leakage detection device (40) arranged at the rear end of the shell (10); a cleaning device (20) adjustable in a radial direction is arranged at the front end of the shell (10); a travel drive device (30) is arranged on the outer wall of the shell (10); a first flange support seat (21) for supporting the adjustable cleaning device (20) is arranged at the front end of the shell (10); the bottom of the cleaning device (20) is fixedly connected to the outer disk surface of the first flange support seat (21) by bolts; a third flange support seat (31) is arranged between the first flange support seat (21) and the rear end of the shell (10); and two mutually symmetrical travel drive seats (31) are arranged at intervals along the same side wall of each third flange support seat (31). The cleaning device (30) comprises a cleaning brush body (200), a rotating cleaning motor (201), a front fixed disk (202) and a brush body supporting rotating disk (203); a front fixed disk (202) is provided at the front end of the housing (10); a fixed end of the rotating cleaning motor (201) is fixed to the center of the front end of the housing (10) through the front fixed disk (202); an output shaft of the rotating cleaning motor (201) extends from the center of the housing (10) to the front end The front fixed disk (202) is arranged after extending in the direction of the external axis, and a brush body supporting turntable (203) is arranged outside the front fixed disk (202) and on the output shaft of the rotating cleaning motor (201) through a first bearing sleeve, and a plurality of radial support arms (204) extending radially outward are arranged on the circumference of the brush body supporting turntable (203), and the free ends of the cleaning brush bodies (200) along the radial support arms (204) surround the circumference of the fixed brush body supporting turntable (203).

2. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 1, characterized in that: The mobile cleaning body (1) also includes a travel drive device (30) arranged on the outer wall of the shell (10) between the cleaning device (20) and the magnetic flux leakage detection device (40), and a second flange support seat (41) for supporting the magnetic flux leakage detection device (40) is arranged at the rear end of the shell (10), and the bottom of the magnetic flux leakage detection device (40) is fixedly connected to the outer disk surface of the second flange support seat (41) by bolts.

3. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 2, characterized in that: One or more third flange support seats (31) are arranged at equal intervals on the outer wall of the housing (10) between the first flange support seat (21) and the second flange support seat (41), and two mutually symmetrical travel drive devices (30) are arranged at intervals on the same side wall of each third flange support seat (31).

4. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 1, characterized in that: The cleaning brush body (200) comprises a brush head (2001) and a brush head supporting ring (2002); the brush heads (2001) are evenly arranged on the outer circumference of the brush head supporting ring (2002); the brush head supporting ring (2002) is composed of a plurality of arc-shaped blocks (2002a) which are close to each other end to end; the brush heads (2001) are evenly arranged on the arc-shaped outer wall of the arc-shaped block (2002a); one end of the radial support arm (204) is fixed on the circumference of the brush body supporting rotating disk (203); and the free end of the support arm (204) is fixedly connected to the arc-shaped inner wall of the arc-shaped block (2002a).

5. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 4, characterized in that: The support arm (204) is composed of a plurality of telescopic rods connected in a sleeve. A variable diameter drive motor (2003) is coaxially arranged at the center of the outer side of the brush body support turntable (203). A variable diameter drive disk (2004) close to the outer side wall of the brush body support turntable (203) is arranged on the output shaft of the variable diameter drive motor (2003) through a bearing sleeve. A variable diameter drive rod (2005) corresponding to each support arm (204) is extended along the tangential direction of the variable diameter drive disk (2004). The free end of the variable diameter drive rod (2005) is drivingly connected to the end of the support arm (204).

6. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 5, characterized in that: A driving connecting rod (2006) is provided at the free end of the variable diameter driving rod (2005), one end of the driving connecting rod (2006) is rotatably connected to the free end of the variable diameter driving rod (2005), a fixed support sleeve (2007) is sleeved on the end of the support arm (204), and the other end of the driving connecting rod (2006) is rotatably connected to the outer wall of the fixed support sleeve (2007).

7. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 1, characterized in that: A plurality of concave notches (11) are provided on the surface of the housing (10) between the inner disk surface of the first flange support seat (21) and the disk surface of the second flange support seat (41) along the axial direction; a screw rod (32) is provided between the inner disk surface of the first flange support seat (21) and the inner disk surface of the second flange support seat (41) and is located in each concave notch; a screw motor (33) drivingly connected to each screw rod is fixed in the concave notch (11) on one side of the outer disk surface of the second flange support seat (41); At least two mutually symmetrical travel drive devices (30) are respectively arranged on the inner disk edge, the inner disk edge of the second flange support seat (41), and the disk edge of the third flange support seat (31) on the side close to the second flange support seat (41). Each travel drive device (30) and the screw rod (32) on the corresponding side are located on the same vertical plane and are inclined toward the screw rod. Each travel drive device (30) is transmission-connected to a slider (34) on the screw rod (32). The center of the slider (34) is sleeved on the screw rod (32) through a threaded hole.

8. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 7, characterized in that: The travel drive device (30) comprises a travel support seat (300), a steering wheel bracket (301), a steering wheel (302) and a suspension support spring (303). At least two mutually symmetrical travel support seats (300) are respectively arranged on the inner disk edge of the first flange support seat (21), the inner disk edge of the second flange support seat (41) and the disk edge of the third flange support seat (31) close to the second flange support seat (41). Each travel support seat (300) is rotatably connected to a steering wheel bracket (301) inclined in the direction of the screw rod. The steering wheel (302) is arranged on the free end of the steering wheel bracket (301). The outer wall of the steering wheel bracket (301) is connected to a slider (34) on the screw rod (32) through a suspension support spring (303).

9. The self-adaptive stain cleaning mechanism for the inner wall of a natural gas pipeline according to claim 1, characterized in that: A circular guide support structure (50) is arranged around the outer periphery of the disk surface of the second flange support seat (41) at a side away from the magnetic flux leakage detection device (40), the magnetic flux leakage detection device (40) comprising a circular detection support frame (400) arranged on the outer periphery of the outer disk surface of the second flange support seat (41) and a plurality of eddy current magnetic flux leakage detection coils (401) arranged at equal intervals on the circumference of the circular detection support frame (400), the diameter height of the circular guide support structure (50) being greater than the diameter height of the eddy current magnetic flux leakage detection coils (401); the guide support structure (50) comprises a support spring (500), a guide support ring (501) and a ball ( 502), the guide support ring (501) is arranged around the outer periphery of the disk surface of the second flange support seat (41) on the side away from the circular ring detection support frame (400), the guide support ring (501) is composed of a plurality of arc-shaped guide blocks (5010) which are close to each other end to end, the inner ring wall of each arc-shaped guide block (5010) is connected to the outer wall of the second flange support seat (41) through a radially arranged support spring (500), and a plurality of through holes (503) are evenly arranged on the arc-shaped outer wall of each arc-shaped guide block (5010), and a ball (502) protruding from the outside of the arc-shaped guide block (5010) is rotatably arranged in each through hole (503).

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