CN112378925A - CCTV-based pipeline detection method - Google Patents
CCTV-based pipeline detection method Download PDFInfo
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- CN112378925A CN112378925A CN202011018395.XA CN202011018395A CN112378925A CN 112378925 A CN112378925 A CN 112378925A CN 202011018395 A CN202011018395 A CN 202011018395A CN 112378925 A CN112378925 A CN 112378925A
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- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 230000009193 crawling Effects 0.000 claims abstract description 44
- 238000005507 spraying Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 7
- 231100000331 toxic Toxicity 0.000 claims description 5
- 230000002588 toxic effect Effects 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 206010070834 Sensitisation Diseases 0.000 description 14
- 230000008313 sensitization Effects 0.000 description 14
- 238000007639 printing Methods 0.000 description 10
- 210000003128 head Anatomy 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/954—Inspecting the inner surface of hollow bodies, e.g. bores
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/30—Inspecting, measuring or testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
- G01N2021/9518—Objects of complex shape, e.g. examined with use of a surface follower device using a surface follower, e.g. robot
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/954—Inspecting the inner surface of hollow bodies, e.g. bores
- G01N2021/9548—Scanning the interior of a cylinder
Abstract
The application relates to a CCTV-based pipeline detection method, which comprises the following steps: the method comprises the following steps: pumping water and plugging; step two: cleaning a pipeline; step three: laying a track, placing a CCTV pipeline crawling trolley on the track, covering a camera of the CCTV pipeline crawling trolley by a protective cover, mounting an ultraviolet irradiation lamp on the pipeline crawling trolley, mounting liquid spraying equipment on the CCTV pipeline crawling trolley, and mounting an annular scraper attached to the inner wall of the pipeline behind the liquid spraying equipment on the CCTV pipeline crawling trolley; step four: the CCTV pipeline crawling trolley is driven to run on the rail and run from one end of the pipeline to the other end of the pipeline, the liquid spraying equipment is controlled to spray photosensitive ink on the circumferential inner wall of the pipeline, the pipeline is sprayed with the photosensitive ink, and an annular scraper at the rear of the liquid spraying equipment scrapes off the photosensitive ink on the circumferential inner wall of the pipeline in the running process of the CCTV pipeline crawling trolley. This application has the damaged detection precision effect of improvement pipeline.
Description
Technical Field
The application relates to the field of pipeline detection, in particular to a CCTV-based pipeline detection method.
Background
The CCTV detection of the pipeline refers to an endoscopic camera detection system, can also be understood as a municipal pipeline CCTV detection robot, and comprises a controller, a lifting platform, a camera, a crawler and the like. The crawler is provided with 4 wheels, looks like an enlarged toy remote control car, can pass through a barrier, freely passes through the drain pipe, timely transmits the information in the pipe to an operation platform outside the well, and comprehensively records the pipe condition. CCTV pipeline inspection not only can detect the inside jam condition of pipeline, can also detect pipeline material, pipe diameter, the condition of leaking, the damaged condition.
In the related technology, when a pipeline is damaged and leaks water, CCTV (closed circuit television) detection of the pipeline can be adopted, so that the crawler moves in the pipeline to collect images, people search the damaged position in the pipeline through the returned images, and the pipeline is generally cracked under the damaged condition.
In view of the above-mentioned related arts, the inventor believes that since the inner wall of the pipeline needs to be illuminated by the lighting device when the crawler moves in the pipeline, a person may miss a damaged position due to insufficient illumination of the lighting device or reflection of light in the pipeline when viewing an image, or a crack may not be found by the person due to a too thin crack.
Disclosure of Invention
In order to improve the precision of pipeline damage detection, the application provides a pipeline detection method based on CCTV
The CCTV-based pipeline detection method provided by the application adopts the following technical scheme:
a CCTV-based pipeline detection method comprises the following steps:
the method comprises the following steps: pumping water and plugging; step two: cleaning a pipeline; step three: laying a track, placing a CCTV pipeline crawling trolley on the track, covering a camera of the CCTV pipeline crawling trolley by a protective cover, mounting an ultraviolet irradiation lamp on the pipeline crawling trolley, mounting liquid spraying equipment on the CCTV pipeline crawling trolley, and mounting an annular scraper attached to the inner wall of the pipeline behind the liquid spraying equipment on the CCTV pipeline crawling trolley; step four: driving the CCTV pipeline crawling trolley to run on the rail and move from one end of the pipeline to the other end of the pipeline, controlling the liquid spraying equipment to spray the photosensitive ink on the circumferential inner wall of the pipeline, enabling the pipeline to be sprayed with the photosensitive ink, and scraping the photosensitive ink on the circumferential inner wall of the pipeline by an annular scraper at the rear of the liquid spraying equipment in the running process of the CCTV pipeline crawling trolley; step five: taking down the protective cover, starting the camera and the ultraviolet irradiation lamp, driving the CCTV pipeline crawling trolley to return from one end of the pipeline to the other end, and transmitting the image to the system control terminal by the camera; step six: and determining a pipeline damage area according to the color change concentrated area in the image received by the control terminal, and judging the position of the damage area in the pipeline according to the running distance of the CCTV pipeline crawling trolley when the color change concentrated area is close to the position of the CCTV pipeline crawling trolley in the image.
Through adopting above-mentioned technical scheme, strike off sensitization ink with the annular scraper blade after pipeline axial inner wall spraying sensitization ink, and the damaged position of pipeline is owing to produced the crack, and sensitization ink piles up in the crack, therefore the annular scraper blade can not strike off the sensitization ink in the crack. When ultraviolet rays emitted by the ultraviolet irradiation lamp irradiate on the inner wall of the pipeline, photosensitive ink is accumulated in the crack, and the color of the photosensitive ink is changed by the irradiation of the ultraviolet rays, so that color contrast can be generated between the crack and the intact inner wall of the pipeline, and human eyes can distinguish a damaged area more easily after a camera is used for collecting images.
Optionally, the first specific method of the step is as follows: the water inlets of the upstream well and the intersection well are plugged, the plugged pipeline is plugged by adopting a rubber air bag, and before plugging, a toxic and harmful gas test is carried out firstly and is plugged by a diver in a professional unit.
By adopting the technical scheme, after the water inlet is blocked by the rubber air bag, upstream water is prevented from entering the pipeline to be detected. And before plugging, toxic and harmful gas testing is carried out, so that the condition that the body health is influenced by the fact that people entering the intersection well inhale toxic and harmful gas is prevented.
Optionally, the specific method in the second step is as follows: the washing head is adopted to spray water flow to thoroughly dredge the blockage caused by the sludge and various domestic garbage in the pipeline except the concrete blocks.
By adopting the technical scheme, the water flow impulsive force of the flushing head can flush out sludge and various domestic garbage in the pipeline, and the concrete pipeline can not be damaged.
Optionally, the annular scraper is made of rubber.
Through adopting above-mentioned technical scheme, the annular scraper blade that rubber was made closely laminates with the pipeline inner wall, can be thoroughly must strike off the sensitization printing ink of pipeline inner wall.
Optionally, an adhesive is added to the photosensitive ink.
Through adopting above-mentioned technical scheme, the adhesive can improve the viscidity of sensitization printing ink, and sensitization printing ink can be in the crack that appears in pipeline inner wall upper end, avoids sensitization printing ink because gravity drops.
Optionally, the track is installed by multi-section splicing, the track is divided into multiple sections of sub-tracks, and the sub-tracks are sent into the pipeline from the intersection well and spliced at the pipeline opening.
By adopting the technical scheme, the length of the track is adapted to the length of the pipeline, and the size of the intersection well cannot enable the whole track to be placed into the pipeline, so that the intersection well needs to be placed into the intersection well in a segmented mode, and splicing is completed at the pipeline opening.
Optionally, the liquid spraying device adopts a rotary spray head.
Through adopting above-mentioned technical scheme, rotatory meeting head can make sensitization printing ink spraying in pipeline circumference inner wall.
Optionally, after the pipeline is cleaned in the second step, the pipeline is dried by a dryer.
By adopting the technical scheme, the photosensitive ink can be prevented from being mixed with water after the pipeline is dried, and the concentration is reduced. Also makes the photosensitive ink more easily absorbed in the cracks of the pipeline
In summary, the present application includes at least one of the following beneficial technical effects:
the annular scraper blade is used for scraping the photosensitive ink after the photosensitive ink is sprayed on the axial inner wall of the pipeline, and the photosensitive ink is accumulated in the cracks due to the cracks at the damaged position of the pipeline, so that the photosensitive ink in the cracks can not be scraped by the annular scraper blade. When ultraviolet rays emitted by the ultraviolet irradiation lamp irradiate on the inner wall of the pipeline, photosensitive ink is accumulated in the crack, and the color of the photosensitive ink is changed by the irradiation of the ultraviolet rays, so that color contrast can be generated between the crack and the intact inner wall of the pipeline, and human eyes can distinguish a damaged area more easily after a camera is used for collecting images.
Drawings
Fig. 1 is a flowchart of a method for detecting a pipeline based on CCTV in an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a CCTV-based pipeline detection method, and referring to FIG. 1, the CCTV-based pipeline detection method comprises the following steps:
the method comprises the following steps: and (6) pumping water and plugging.
Specifically, each water inlet of the upstream well and the intersection well is plugged, the plugged pipeline is plugged by a rubber air bag, toxic and harmful gas testing is performed before plugging, and the plugging is performed by a diver in a professional unit.
Step two: and (5) cleaning the pipeline.
The vehicle-mounted high-pressure dredging machine is suitable for running various streets, is not limited by street conditions and is not influenced by weather, is fully mechanically operated, is safe and simple, can be suitable for various pipe diameters of 200-1500 mm by being provided with various flushing heads, can dredge the pipeline by a maximum distance of about 150 meters by a freely configured high-pressure pipe, and is suitable for partially adopting a sewage pipeline with a long distance of a pipe jacking process. The device has the greatest characteristic that water jet generated by high pressure can completely dredge the blockage caused by sludge and various domestic garbage in the pipeline except concrete blocks, can remove attachments such as rust scale, corrosive substances and the like on the wall of the pipeline, and reduces the corrosion of acid and alkali in sewage to the pipeline. The washing head can freely run in the pipeline through backward and forward water flows generated by high pressure, sludge and garbage in the pipeline can be washed to the intersection well by the backward sprayed high-pressure water flows, and then the sludge and the garbage are pumped into the sludge storage tank to be transported to a designated place to be discharged, so that the pollution of the sludge and the garbage to the surrounding environment can be reduced to the minimum extent.
After the pipeline is cleaned, the pipeline is dried by the dryer after the pipeline is cleaned, so that the adhesion of the photosensitive printing ink is facilitated.
Step three: laying a track, placing a CCTV pipeline crawling trolley on the track, covering a camera of the CCTV pipeline crawling trolley by a protective cover, installing an ultraviolet irradiation lamp on the pipeline crawling trolley, installing liquid spraying equipment on the CCTV pipeline crawling trolley, and installing an annular scraper attached to the inner wall of the pipeline behind the liquid spraying equipment on the CCTV pipeline crawling trolley.
Step four: the CCTV pipeline crawling trolley is driven to run on the rail and run from one end of the pipeline to the other end of the pipeline, the liquid spraying equipment is controlled to spray photosensitive ink on the circumferential inner wall of the pipeline, the pipeline is sprayed with the photosensitive ink, and an annular scraper at the rear of the liquid spraying equipment scrapes off the photosensitive ink on the circumferential inner wall of the pipeline in the running process of the CCTV pipeline crawling trolley.
Specifically, the length of the track is adapted to the length of the pipeline, and the size of the intersection well cannot enable the whole track to be placed into the pipeline, so that the track needs to be placed into the intersection well in sections, and splicing is completed at the pipeline opening. The splicing structure of the tracks can be that the two ends of the sub-tracks are respectively provided with a clamping groove and a clamping block, and the adjacent sub-tracks are clamped and connected through the clamping block and the clamping groove. In order to enable the image collected by the camera on the CCTV pipeline crawling trolley to be centered, two ends of the track are supported by the supports, and the track is coaxially arranged in the pipeline. For avoiding the image that the camera was gathered to receive orbital sheltering from, the camera is provided with two, and one is installed in the position that CCTV pipeline crawled the dolly and is located the track top, and another is installed in the position that CCTV pipeline crawled the dolly and is located the track below. The track is unsettled inside wall top under the pipeline, can prevent that the track from directly sheltering from the crack to and the hydrojet equipment of being convenient for sprays sensitization printing ink in the pipeline inside wall comparatively uniformly.
The liquid spraying equipment adopts a rotating nozzle to spray photosensitive ink on the circumferential inner side wall of the pipeline. Due to the shielding of the track, two rotary spray heads can be arranged on the CCTV pipeline crawling trolley and are respectively positioned on two sides of the track.
The photosensitive ink is a UV ink. The photosensitive ink is sensitive to ultraviolet rays, and when the photosensitive ink is irradiated by the ultraviolet rays, the color of the photosensitive ink is obviously changed. And the adhesive is added in the UV ink, so that the photosensitive ink in the gap of the inner top wall in the pipeline can be adsorbed without dripping.
The annular scraper blade is made by rubber, and the circumference lateral wall of annular scraper blade pastes mutually with the circumference inside wall of pipeline to strike off the sensitization ink of pipeline inner wall when the annular scraper blade removes. Because sensitization printing ink can not the complete spraying in the pipeline inner wall when the spraying, consequently sensitization printing ink can not all get into the crack, and at the in-process of scraping, appears the position of crack at the pipeline, because annular scraper blade lateral wall can't contact the crack inner wall, consequently sensitization printing ink can be scraped the car and adsorb and pile up in the crack.
The protective cover can prevent the photosensitive ink from being stained with the lens of the camera when the liquid spraying equipment sprays.
Step five: and taking down the protective cover, starting the camera and the ultraviolet irradiation lamp, driving the CCTV pipeline crawling trolley to return to the other end from one end of the pipeline, and transmitting the image to the system control terminal by the camera.
Specifically, the annular scraper can be taken down when the CCTV pipeline crawling trolley returns, so that the resistance of the CCTV pipeline crawling trolley during moving is reduced. The camera is connected with the system control terminal through a data line, and a display is arranged on the system control terminal and used for people to watch images in the pipeline.
Step six: and determining a pipeline damage area according to the color change concentrated area in the image received by the control terminal, and judging the position of the damage area in the pipeline according to the running distance of the CCTV pipeline crawling trolley when the color change concentrated area is close to the position of the CCTV pipeline crawling trolley in the image.
Specifically, when ultraviolet rays emitted by the ultraviolet irradiation lamp irradiate the inner wall of the pipeline, photosensitive ink is accumulated in the crack, and the color of the photosensitive ink is changed due to the ultraviolet irradiation, so that color contrast can be generated between the crack and the intact inner wall of the pipeline, and human eyes can distinguish a damaged area more easily after a camera is used for collecting images. The system control terminal can monitor the running distance of the CCTV pipeline crawling trolley in real time, and the collected images are also real-time, so that the position of the color change concentrated area in the pipeline can be judged according to the running distance of the CCTV pipeline crawling trolley when the color change concentrated area appears at the position, close to the CCTV pipeline crawling trolley, in the image, and the position of the color change concentrated area is the position of the damaged area.
There will also be some sensitive ink on the inner wall of the actual tube, but since most of the sensitive ink is scraped off, the sensitive ink abutting in the crack will still produce a color contrast.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A CCTV-based pipeline detection method is characterized by comprising the following steps:
the method comprises the following steps: pumping water and plugging;
step two: cleaning a pipeline;
step three: laying a track, placing a CCTV pipeline crawling trolley on the track, covering a camera of the CCTV pipeline crawling trolley by a protective cover, mounting an ultraviolet irradiation lamp on the pipeline crawling trolley, mounting liquid spraying equipment on the CCTV pipeline crawling trolley, and mounting an annular scraper attached to the inner wall of the pipeline behind the liquid spraying equipment on the CCTV pipeline crawling trolley;
step four: driving the CCTV pipeline crawling trolley to run on the rail and move from one end of the pipeline to the other end of the pipeline, controlling the liquid spraying equipment to spray the photosensitive ink on the circumferential inner wall of the pipeline, enabling the pipeline to be sprayed with the photosensitive ink, and scraping the photosensitive ink on the circumferential inner wall of the pipeline by an annular scraper at the rear of the liquid spraying equipment in the running process of the CCTV pipeline crawling trolley;
step five: taking down the protective cover, starting the camera and the ultraviolet irradiation lamp, driving the CCTV pipeline crawling trolley to return from one end of the pipeline to the other end, and transmitting the image to the system control terminal by the camera;
step six: and determining a pipeline damage area according to the color change concentrated area in the image received by the control terminal, and judging the position of the damage area in the pipeline according to the running distance of the CCTV pipeline crawling trolley when the color change concentrated area is close to the position of the CCTV pipeline crawling trolley in the image.
2. The CCTV-based pipeline inspection method according to claim 1, wherein the step one specific method is:
the water inlets of the upstream well and the intersection well are plugged, the plugged pipeline is plugged by adopting a rubber air bag, and before plugging, a toxic and harmful gas test is carried out firstly and is plugged by a diver in a professional unit.
3. The CCTV-based pipeline detection method according to claim 1, wherein the specific method of the second step is as follows: the washing head is adopted to spray water flow to thoroughly dredge the blockage caused by the sludge and various domestic garbage in the pipeline except the concrete blocks.
4. The CCTV-based pipeline inspection method according to claim 1, wherein the annular squeegee is made of rubber.
5. The CCTV-based pipeline inspection method according to claim 1, wherein an adhesive is added to the photosensitive ink.
6. The CCTV-based pipeline inspection method according to claim 1, wherein the track is installed by dividing the track into a plurality of sub-tracks by multi-segment splicing, and feeding the sub-tracks into the pipeline from the junction well to splice at the pipeline mouth.
7. The CCTV-based pipeline inspection method according to claim 1, wherein the liquid spraying apparatus employs a spin head.
8. The CCTV-based pipeline inspection method according to claim 1, wherein the pipeline is dried by a dryer after being cleaned in the second step.
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Application publication date: 20210219 |