Old drainage pipe channel detection method and damage repair method

Abstract

The invention discloses an old drainage pipe channel detection method and a damage repair method, and belongs to the technical field of construction, and the method comprises the steps: carrying out the data collection of an old drainage pipe channel, building a model according to the data, carrying out the regional detection of the model, surveying the surrounding environment of a first region, and finding the cause of a pipe channel problem. Summarizing data, deducing a second area, performing next step or data correction according to a deducing result, summarizing rules and causes of problems by comparing causes of the same problems of the pipe ducts at different positions, and performing simulated damage repair on the places with the problems; when repairing is carried out, the lining hose is arranged on the tubular frame in a sleeving mode, the lining hose is expanded through air pressure, the lining hose is cured through irradiation of an ultraviolet lamp tube, a detection method finds reasons from the surrounding environment and a pipe channel of the lining hose, so that problems are found more easily and solved from the source, waste of materials is reduced through the repairing method and the pipeline frame structure, and the repairing cost is reduced. And an integrated structure is adopted, so that construction is simple and quick.

Description

Technical Field

[0001] The present invention belongs to the field of construction technology, and specifically relates to a method for detecting old drainage pipes and a method for repairing damages. Background Art

[0002] At present, along with the construction of urban transportation facilities, such as roads, bridges, and underground rail transit, drainage facilities used to protect the water quality of public waters and the urban public environment have also developed greatly in recent years. Most of the old drainage pipes in the old city are located in places with dense buildings and complex geological conditions. If the traditional road excavation and repair technology is used for repair, not only the construction period is long, there are many process handovers, and it affects traffic and citizens' lives, but the construction safety and quality cannot be effectively guaranteed. Therefore, the feasibility of building new drainage pipes in the old city is low, so non-excavation methods are often used to repair them. However, there are difficulties in the repair of old drainage pipes, such as lack of original drawings, difficulty in identifying defect locations, large pipe area, and waste of materials. When repairing pipes under unclear circumstances, the construction method may not be applicable, and the pipe problem cannot be solved from the source.

[0003] A pipeline damage repair method with reference application number CN200910080988.6, inserting a new pipe repair pipe into the damaged pipe, and the method and steps of repairing the pipe include dredging; selecting the specifications of the new pipe repair pipe; cutting the new pipe repair pipe into short sections and making short pipe repair units; processing the front and rear end faces of each short pipe repair unit into interconnected connection ports; installing a sealing ring at one end of the short pipe repair unit; sending the short pipe repair unit underground, and using a press to push the interconnected short pipe repair units into the damaged pipe in turn; and injecting filler between the damaged pipe and the short pipe repair unit. This solution cannot solve the above technical problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for detecting old drainage pipes and a method for repairing damage to solve the problems mentioned in the background technology or to achieve better technical effects.

[0005] A method for detecting old drainage pipes and canals comprises the following steps:

[0006] Step 1: collect point cloud data of old drainage pipes and ditches, process the point cloud data to establish a point cloud model; convert the point cloud model into a format that can be input into BIM modeling software, and reversely establish a BIM model in the BIM modeling software with reference to the point cloud model;

[0007] Step 2: Refer to the BIM model to divide the drainage pipes into multiple areas according to their lengths, and first inspect the first area: first, preliminarily determine the location of the drainage pipes with problems through 3D scanning, drone scanning, and on-site structural testing of the first area, then survey the surrounding environment of the drainage pipes with problems, and inspect and compare the water quality in the drainage pipes with problems, the waterlogged soil and dry soil at the outlet with the drainage pipes without problems, find out the cause of the problem in the drainage pipes, summarize the causes and patterns of the problems, record the data into the database, and use the data summarized in the first area to deduce the second area. If the deduction results are qualified, it can be found If there is a drainage pipe with problems in the second area, the next area will be deduced; if the deduction result is unqualified, that is, the drainage pipe with problems in the second area cannot be found, the data will be corrected, and the corrected data will be deduced again in the second area after correction. If the deduction is qualified, the data will be recorded and stored; if the deduction is unqualified, the data will be corrected again and the above steps will be repeated; the remaining areas will be deduced and tested in turn until all areas are deduced and tested, and the problems existing in the drainage pipes and the causes of these problems will be collected. Then, by comparing the causes of the same problems in drainage pipes at different locations, the causes and laws of certain types of problems in the drainage pipes will be summarized, and the data will be recorded and stored;

[0008] Step 3: Based on the problems and locations of the drainage pipes found in step 2, modify the BIM model and mark the locations of the drainage pipes with problems on the BIM model, convert the BIM model to a finite element model, perform finite element model analysis, and then use finite element software to simulate different drainage pipe damage repair methods based on the causes and patterns of certain problems in the drainage pipes summarized in step 2; analyze the finite element simulation results of the drainage pipes under different damage repair methods, comprehensively consider the project status, repair effect, economy and construction difficulty, and find the best repair solutions for different problems through simulated repairs in various situations.

[0009] Preferably, the acquisition equipment in step one includes GPS, laser scanner, and drone, and the processing of the point cloud data includes point cloud data registration, data simplification, noise reduction, blocking, and thinning to build a point cloud model; the acquisition equipment can be used to more accurately find and locate.

[0010] Preferably, the specific steps of converting the BIM model to the finite element software in step 3 include:

[0011] A1: Extraction of physical information: obtaining physical information through the established BIM model;

[0012] A2: Conversion of geometric models, obtaining BIM model geometric entities, extracting geometric information from them and converting them into corresponding data formats. The data formats are supported by both BIM software and finite element analysis software, and the finite element geometric entity model is described by boundary description technology;

[0013] A3: Matching of geometric information and physical information of the geometric model. Automatically matching the physical information and geometric information of the BIM model obtained and converted through A1 and A2 according to the material category and the geometric model body number assignment rules;

[0014] A4: Convert all the information into the parametric design language format of the target finite element software, and finally run it to generate the finite element analysis model.

[0015] Preferably, the finite element simulation result analysis described in step three includes analyzing the ultimate bearing capacity of the drainage pipe, the deformation value and the equivalent stress value of the drainage pipe; this can better identify the cause of the problem and the condition of the surrounding pipes.

[0016] A damage repair method based on an old drainage pipe detection method includes the following steps:

[0017] S1: Blocking the pipeline to be repaired; after determining that there is a damage problem in the drainage pipeline, put the inspection vehicle into the drainage pipeline to detect whether there are other problems inside the pipeline. After the inspection vehicle detects that there are no other problems, measure the location of the problematic pipe section 9 in the drainage pipeline and the length of the problematic pipe section 9 that needs to be repaired. After the inspection is completed, the inspection vehicle is recovered and the blocking device is used to stop the drainage of the problematic pipe section 9; this can better ensure the effective implementation of the repair;

[0018] S2: Cleaning the pipeline to be repaired; using a pump to drain the remaining water inside the problematic pipe section 9, and then cleaning it. After cleaning, testing is performed until it meets the operating standards, making the repair construction more effective;

[0019] S3: Perform pipeline repair operations; prepare a certain length of lining hose and tubular frame, cut the lining hose according to the length of the problematic pipe section to be repaired measured in S1, the tubular frame is provided with a sleeve groove, when the tubular frame is adjusted to the same length as the sleeve groove and the lining hose, the lining hose is sleeved in the sleeve groove, the tubular frame with the lining hose sleeved is moved to the problematic pipe section by means of transportation equipment, the tubular frame is manually controlled to extend until the surface of the lining hose fits the inner wall of the problematic pipe section, the lining hose is expanded by air pressure, the lining hose is irradiated with an ultraviolet lamp, after the lining hose is cured, the ultraviolet lamp is turned off, the tubular frame is contracted, the tubular frame is moved outward so that the tubular frame is away from the lining hose whose upper surface fits the cured surface at one end of the outlet, and the tubular frame is moved out by means of transportation equipment; the integrated tubular frame can make the repair construction more convenient, and the segmented repair construction can better save materials;

[0020] S4: Check the repair effect; conduct water leakage test on the completed problematic pipe section; check whether the repair method is effective.

[0021] More preferably, the blocking device includes an air bag, which is provided with air outlets at two ends, and the air outlets are connected to ropes; the air bag can better block water from entering the pipeline to be repaired, so that the repair work can be carried out better.

[0022] A tubular frame based on a method for repairing damaged old drainage pipes, the tubular frame is provided with a tubular body, a plurality of clamping mechanisms are provided inside the tubular body, the clamping mechanism is provided with a central bearing, a plurality of support arms are provided around the central bearing, each support arm is connected with a clamping block; the central bearing is cooperatively connected with a straight shaft, and a plurality of ultraviolet lamp tubes are provided at the straight shaft between the two clamping mechanisms;

[0023] More preferably, the support arm is retractable, the clamping blocks at both ends of the tube body are stepped clamping blocks, and the clamping blocks are arc-shaped on one side close to the tube body; the support arm is retractable and can be adjusted to different lengths according to different pipe sizes, and the clamping blocks are arc-shaped and can better fit the tube wall to achieve a better clamping effect.

[0024] More preferably, cameras are installed at both ends of the straight axis, the cameras are rotatable, and the cameras are provided with infrared night vision function; by setting the cameras, the situation in the pipeline can be better observed and the tubular frame can be determined to be placed in a suitable position.

[0025] More preferably, the inside of the tube body is made of ultraviolet-transmissive material, the inner lining hose is a glass fiber hose, and the inner lining hose contains ultraviolet-curable resin material; the inner lining hose can better fit the inner wall of the pipeline.

[0026] Compared with the prior art, the present invention can achieve the following technical effects:

[0027] By collecting point cloud data of old drainage pipes, processing the point cloud data to establish a cloud model, converting the format of the point cloud model, and directly reversely establishing a BIM model with reference to the point cloud model, regional detection is carried out with this BIM model, and the existing problems of drainage pipes in each area are collected. By surveying and investigating the surrounding areas of the drainage pipes with problems, the causes and patterns of the problems in the drainage pipes are found out, the data is recorded in the database, and the second area is deduced based on the data summarized in the first area. If the deduction result is qualified, the next area is deduced. If the deduction result is qualified, the next area is deduced. If it fails, the data will be corrected and the corrected data will be deduced again in the second area. If it passes, the next area will be deduced. If it fails, it will be corrected again. The above steps are repeated and the final data is recorded in the database. The drainage pipes are simulated and repaired through the data in the database to find the best repair plan. This detection method is to find out the cause by establishing a model and the surrounding environment and the pipes themselves, so that the problem is easier to be found and the problem location is more accurately located. The problems in the pipes can be solved from the source and summarized. When the same problem is found, the data in the database can be used as a reference, which makes it easier to find the cause and solution.

[0028] The repair method is to meet the operation standards through plugging and cleaning, mark the pipe section to be repaired, put the lining hose cover into the groove on the outside of the tubular frame, use the transportation mechanism to view the camera in the tubular frame, place the tubular frame in a suitable position, operate the retractable support arm to change the size of the pipe body, so that the lining hose on the outside is close to the pipe section to be repaired, expand the lining hose through air pressure, start the ultraviolet lamp to cure the lining hose, wait for it to be completely cured, control the tubular frame to shrink slightly, so that it is close to the pipe section to be repaired, and smooth the inner surface of the lining hose by scraping, so that the pipeline repair is accurate. This repair method uses a tubular frame. The tubular frame is an integrated structure, which makes the construction steps simpler. The corresponding lining hose length is adjusted by measuring the length of the pipe section to be repaired to reduce material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 is a flow chart of the detection method;

[0031] Figure 2 It is a cross-sectional view of the left side of the tubular frame;

[0032] Figure 3is a front view of the tubular frame;

[0033] Figure 4 It is a schematic diagram of the structure of the tubular frame entering the pipeline;

[0034] Figure 5 It is a schematic diagram of a tubular frame scraper liner hose.

[0035] In the figure: 1. pipe body, 2. lining hose, 3. support arm, 4. clamping block, 5. straight shaft, 6. ultraviolet lamp tube, 7. camera, 8. bearing, 9. problematic pipe section, 41. stepped clamping block. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] like Figure 1 As shown, a method for detecting old drainage pipes includes the following steps:

[0040] Step 1: collect point cloud data of old drainage pipes and ditches, process the point cloud data to establish a point cloud model; convert the point cloud model into a format that can be input into BIM modeling software, and reversely establish a BIM model in the BIM modeling software with reference to the point cloud model;

[0041] Step 2: Refer to the BIM model to divide the drainage pipes into multiple areas according to their lengths, and first inspect the first area: first, preliminarily determine the location of the drainage pipes with problems through 3D scanning, drone scanning, and on-site structural testing of the first area, then survey the surrounding environment of the drainage pipes with problems, and inspect and compare the water quality in the drainage pipes with problems, the waterlogged soil and dry soil at the outlet with the drainage pipes without problems, find out the cause of the problem in the drainage pipes, summarize the causes and patterns of the problems, record the data into the database, and use the data summarized in the first area to deduce the second area. If the deduction is qualified, the second area can be found. If there are drainage pipes with problems in the area, the next area will be deduced; if the deduction result is unqualified, that is, the drainage pipes with problems in the second area cannot be found, the data will be corrected, and the corrected data will be deduced again in the second area after correction. If the deduction result is qualified, the data will be recorded and stored; if the deduction result is unqualified, the data will be corrected again and the above steps will be repeated; the remaining areas will be deduced and tested in turn until all areas are deduced and tested. The problems existing in the drainage pipes and the causes of these problems are collected, and then by comparing the causes of the same problems in drainage pipes at different locations, the causes and laws of certain types of problems in the drainage pipes are summarized, and the data are recorded and stored;

[0042] Step 3: Based on the problems and locations of the drainage pipes found in step 2, modify the BIM model and mark the locations of the drainage pipes with problems on the BIM model, and convert the BIM model to a finite element model. The specific steps include:

[0043] A1: Extraction of physical information: obtaining physical information through the established BIM model;

[0044] A2: Conversion of geometric models, obtaining BIM model geometric entities, extracting geometric information from them and converting them into corresponding data formats. The data formats are supported by both BIM software and finite element analysis software, and the finite element geometric entity model is described by boundary description technology;

[0045] A3: Matching of geometric information and physical information of the geometric model. Automatically matching the physical information and geometric information of the BIM model obtained and converted through A1 and A2 according to the material category and the geometric model body number assignment rules;

[0046] A4: Convert all the information into the parametric design language format of the target finite element software, and finally run it to generate the finite element analysis model;

[0047] Conduct finite element model analysis, and then combine the causes and laws of certain types of problems in drainage pipes summarized in step 2, and use finite element software to simulate different drainage pipe damage repair methods; analyze the finite element simulation results of drainage pipes under different damage repair methods, comprehensively consider the project status, repair effect, economy and construction difficulty, and find the best repair solutions for different problems through simulated repairs in various situations.

[0048] Example 2

[0049] like Figure 2-5 As shown in the figure, a method for repairing the damage of old drainage pipes:

[0050] Step 1: Blocking the pipeline to be repaired; after determining that there is a damage problem in the drainage pipeline, put the inspection vehicle into the drainage pipeline to detect whether there are other problems inside the pipeline. After the inspection vehicle detects that there are no other problems, measure the location of the problematic pipe section 9 in the drainage pipeline and the length of the problematic pipe section 9 that needs to be repaired. After the inspection is completed, the inspection vehicle is recovered and the blocking device is used to stop the drainage of the problematic pipe section 9;

[0051] Step 2: Clean the pipeline to be repaired; use a pump to drain the remaining water inside the problematic pipe section 9, then clean it, and after cleaning, perform inspection until it meets the operating standards;

[0052] Step three: perform pipeline repair operations; prepare a certain length of lining hose 2 and tubular frame, cut the lining hose 2 according to the measured length of the problem pipe section 9 to be repaired, the tubular frame is provided with a sleeve groove, when the tubular frame is adjusted to the same length as the sleeve groove and the lining hose 2, the lining hose 2 is sleeved in the sleeve groove, and the tubular frame with the sleeved lining hose 2 is transported to the appropriate position of the problem pipe section by using a transportation mechanism, and the lining hose 2 is expanded and fits the pipe section 9 to be repaired by air pressure, and the lining hose 2 is irradiated with an ultraviolet lamp 6, and after the lining hose 2 is cured, the ultraviolet lamp 6 is turned off, the tubular frame shrinks, and the tubular frame is moved outward so that the tubular frame is away from the outlet end and overlaps with the cured lining hose 2, and the tubular frame is controlled to open so that its upper surface is close to the cured lining hose 2, and the tubular frame is slowly pulled out by the transportation equipment, so that the tubular upper surface is scraped and the inner surface of the cured lining hose 2 is smooth and uniform, so that the pipeline repair is accurate, the waste of materials is reduced, and the integrated structure is mostly used to make the construction simple and fast.

[0053] Example 3

[0054] When the pipeline is rectangular, the pressing block in the pressing device can be replaced with a rectangular shape that fits the pipeline cross-section, and the pipe body can be replaced with a suitable shape. The construction steps are the same as those in Example 2.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for detecting old drainage pipes, characterized in that: The steps include: Step 1: collect point cloud data of old drainage pipes and ditches, process the point cloud data to establish a point cloud model; convert the point cloud model into a format that can be input into BIM modeling software, and reversely establish a BIM model in the BIM modeling software with reference to the point cloud model; Step 2: Refer to the BIM model to divide the drainage pipes into multiple areas according to their lengths, and first inspect the first area: first, preliminarily determine the location of the drainage pipes with problems through 3D scanning, drone scanning, and on-site structural testing of the first area, then survey the surrounding environment of the drainage pipes with problems, and inspect and compare the water quality in the drainage pipes with problems, the waterlogged soil and dry soil at the outlet with the drainage pipes without problems, find out the cause of the problem in the drainage pipes, summarize the causes and patterns of the problems, record the data into the database, and use the data summarized in the first area to deduce the second area. If the deduction results are qualified, it can be found If there is a drainage pipe with problems in the second area, the next area will be deduced; if the deduction result is unqualified, that is, the drainage pipe with problems in the second area cannot be found, the data will be corrected, and the corrected data will be deduced again in the second area after correction. If the deduction is qualified, the data will be recorded and stored; if the deduction is unqualified, the data will be corrected again and the above steps will be repeated; the remaining areas will be deduced and tested in turn until all areas are deduced and tested, and the problems existing in the drainage pipes and the causes of these problems will be collected. Then, by comparing the causes of the same problems in drainage pipes at different locations, the causes and laws of certain types of problems in the drainage pipes will be summarized, and the data will be recorded and stored; Step 3: Based on the problems and locations of the drainage pipes found in step 2, modify the BIM model and mark the locations of the drainage pipes with problems on the BIM model, convert the BIM model to a finite element model, perform finite element model analysis, and then use finite element software to simulate different drainage pipe damage repair methods based on the causes and patterns of certain problems in the drainage pipes summarized in step 2; analyze the finite element simulation results of the drainage pipes under different damage repair methods, comprehensively consider the project status, repair effect, economy and construction difficulty, and find the best repair solutions for different problems through simulated repairs in various situations.

2. The method for detecting old drainage pipes according to claim 1, characterized in that: The point cloud data in step one is collected using a collection device, which includes a GPS, a laser scanner, and a drone. The point cloud data processing includes point cloud data alignment, data simplification, noise reduction, blocking, and thinning.

3. The method for detecting old drainage pipes according to claim 1, characterized in that: The specific steps of converting the BIM model to the finite element software in step 3 include: A1: Extraction of physical information: obtaining physical information through the established BIM model; A2: Conversion of geometric models, obtaining BIM model geometric entities, extracting geometric information from them and converting them into corresponding data formats. The data formats are supported by both BIM software and finite element analysis software, and the finite element geometric entity model is described by boundary description technology; A3: Matching of geometric information and physical information of the geometric model. Automatically matching the physical information and geometric information of the BIM model obtained and converted through A1 and A2 according to the material category and the geometric model body number assignment rules; A4: Convert all the information into the parametric design language format of the target finite element software, and finally run it to generate the finite element analysis model.

4. The method for detecting old drainage pipes according to claim 1, characterized in that: The finite element simulation result analysis described in step three includes analyzing the ultimate bearing capacity of the drainage pipe, the deformation value and the equivalent stress value of the drainage pipe.

5. A method for repairing damaged old drainage pipes, comprising the method for detecting old drainage pipes according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Sealing the pipeline to be repaired; after determining that there is a damage problem in the drainage pipeline, put the inspection vehicle into the drainage pipeline to detect whether there are other problems inside the pipeline. After the inspection vehicle detects that there are no other problems, measure the location of the problematic pipe section (9) in the drainage pipeline and the length of the problematic pipe section (9) that needs to be repaired. After the inspection is completed, the inspection vehicle is recovered and the sealing device is used to stop the drainage of the problematic pipe section (9); S2: Cleaning the pipeline to be repaired; using a pump to drain the remaining water inside the problematic pipeline section (9), and then cleaning it. After cleaning, testing is performed until it meets the operating standards; S3: Perform pipeline repair operations; prepare a certain length of lining hose (2) and a tubular frame, cut the lining hose (2) according to the length of the problematic pipe section (9) to be repaired measured in S1, the tubular frame is provided with a sleeve groove, and when the tubular frame is adjusted to the same length as the sleeve groove and the lining hose (2), the lining hose (2) is sleeved in the sleeve groove, and the tubular frame sleeved with the lining hose (2) is moved to the problematic pipe section (9) by means of transportation equipment, and the tubular frame is manually controlled to extend until the surface of the lining hose (2) fits the inner wall of the problematic pipe section (9), and then stops, and the lining hose (2) is expanded by air pressure, and the lining hose (2) is irradiated with an ultraviolet lamp (6), and after the lining hose (2) is cured, the ultraviolet lamp (6) is turned off, the tubular frame shrinks, and the tubular frame is moved outward so that the tubular frame is away from the outlet end and the upper surface of the tubular frame fits the cured lining hose (2), and then the tubular frame is moved out by means of transportation equipment; S4: Check the repair effect; perform a water leakage test on the completed problematic pipe section (9).

6. A method for repairing damaged old drainage pipes according to claim 5, characterized in that: The blocking device comprises an air bag, and the air bag is provided with air outlets at two ends, and the air outlets are connected with ropes.

7. A tubular frame used in the method for repairing damaged old drainage pipes as claimed in claim 5 or 6, characterized in that: The tubular frame is provided with a tubular body (1), a plurality of clamping mechanisms are provided inside the tubular body (1), the clamping mechanism is provided with a central bearing (8), a plurality of support arms (3) are provided around the central bearing (8), each support arm (3) is connected to a clamping block (4), the central bearing (8) is cooperatively connected to a straight shaft (5), and a plurality of ultraviolet lamp tubes (6) are provided at the straight shaft (5) between the two clamping mechanisms.

8. A tubular frame according to claim 7, characterized in that: The support arm (3) is retractable, the clamping blocks (4) at both ends of the tube body (1) are stepped clamping blocks (41), and the side of the clamping block (4) close to the tube body (1) is in an arc shape.

9. A tubular frame according to claim 7, characterized in that: Cameras (7) are installed at both ends of the straight shaft (5); the camera (7) can rotate 360 ​​degrees and is provided with an infrared night vision function.

10. A tubular frame according to claim 7, characterized in that: The interior of the tube body (1) is made of a material that is transparent to ultraviolet rays, the inner lining hose (2) is a glass fiber hose, and the inner lining hose (2) contains an ultraviolet curing resin material.

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