KR-102962534-B1 - Non-destructive inspection device for water supply pipe

KR102962534B1KR 102962534 B1KR102962534 B1KR 102962534B1KR-102962534-B1

Abstract

The present invention relates to a non-destructive inspection device for water pipes, comprising: a driving body movably seated on the surface of a pipe; a pivot unit installed on the front of the driving body and pivoting; a guide rail installed on the pivot unit; a tilting unit composed of a moving block installed on the guide rail and moving linearly in the longitudinal direction of the guide rail, and a rotating block pivoted by an axis with the moving block; a support unit installed in front of the rotating block of the tilting unit and moving linearly in the longitudinal direction of the rotating block; a holder unit installed on the support unit and equipped with a probe, the height of which is adjusted so that the probe is in close contact with the welded part of the pipe; a marking unit installed on the driving body and etching the surface of the pipe where a defect is detected by the probe by irradiating a laser beam onto the surface of the pipe; and a curvature detection unit installed on the guide rail and measuring the curvature of the pipe.

Inventors

김효섭

Dates

Publication Date: 20260511
Application Date: 20230705

Claims (16)

A vehicle body movably seated on the surface of a pipe; A pivot unit installed on the front of the above-mentioned vehicle and pivoting; A guide rail installed on the above pivot unit; A tilting unit comprising a moving block installed on the guide rail and moving linearly along the longitudinal direction of the guide rail, and a rotating block pivotally coupled to the moving block; A support unit installed in front of the rotating block of the above-mentioned tilting unit and moving linearly in the longitudinal direction of the rotating block; A holder unit installed on the above-mentioned support unit and equipped with a probe, the height of which is adjustable so that the probe is in close contact with the welded part of the pipe; A marking unit installed on the above-mentioned driving body and etching the surface of a pipe where a defect is detected by the above-mentioned probe by irradiating the surface with a laser beam; and It includes a curvature detection unit installed on the guide rail and measuring the curvature of the pipe; The above curvature detection unit is, A distance measuring unit that measures the distance from the guide rail to the pipe surface and calculates a distance value; and a curvature derivation unit that derives the curvature of the pipe by comparing the distance value calculated through the distance measuring unit with data in which the curvature is set according to the distance value; are included. The above distance measuring unit is, A non-destructive inspection device for water pipes characterized by comprising: a first distance measuring sensor installed on the guide rail to measure the distance to the pipe surface; a second distance measuring sensor installed on the guide rail at a distance from the first distance measuring sensor to measure the distance to the pipe surface; and a distance value derivation unit that calculates the difference between the distances measured by the first distance measuring sensor and the second distance measuring sensor to derive a distance value.
In claim 1, The above marking unit is A non-destructive inspection device for water pipes characterized by including a laser irradiator installed inside the above-mentioned vehicle body to irradiate the surface of the pipe with a laser beam for etching.
In claim 2, The above marking unit is A non-destructive inspection device for water pipes characterized by including a cleaner installed in front of the laser irradiator to wipe the surface of the pipe and remove moisture before the laser beam etches the surface of the pipe.
In claim 2, The above marking unit is A non-destructive inspection device for water pipes characterized by including a collection unit installed at the rear of the above-mentioned laser irradiator to suck in and collect fumes generated when the surface of the pipe is etched by a laser beam.
In claim 1, The above pivot unit is A base plate fixed to the front of the above-mentioned vehicle; A protruding plate provided on both sides of the base plate and protruding forward of the driving body, with a clutch formed on its inner surface; A clutch block connected to the clutch of the protruding plate by a concentric axis to pivot, and which contacts the clutch to control the pivot angle as it moves in the axial direction of the concentric axis; and A non-destructive inspection device for water pipes characterized by including a rail fixing part provided in the clutch block and pressurizing a rail groove formed in the guide rail to control the movement of the guide rail.
In claim 5, The above rail fixing part is A fixing piece formed on the front surface of the clutch block and positioned in the rail groove of the guide rail; A guide groove formed in the clutch block adjacent to the fixed piece; A movable member positioned in the guide groove and moving closer to or further away from the fixed member; and A non-destructive inspection device for water pipes characterized by including a rail fixing fastener that penetrates the clutch block and is screw-fastened to a movable member located in the guide groove, thereby moving the movable member by rotational operation.
In claim 5, The above pivot unit is A movable pin having a tip exposed to the outside of the protruding plate and a base penetrating the protruding plate to connect with the clutch block; and A non-destructive inspection device for water pipes characterized by including a fixing lever that pivotally engages the tip of the above-mentioned movable pin and, as it pivots, brings the clutch block into contact with the clutch formed on the inner surface of the above-mentioned protruding plate.
In claim 1, The above tilting unit is It further includes a torsion spring that exerts elastic force to rotate the rotating block within the moving block so that the support unit is oriented in a direction opposite to the surface of the pipe. The above rotating block is A non-destructive inspection device for water pipes characterized by including a stopper that controls the elastic force provided by the torsion spring.
In claim 1, The above support unit is An assembly block having an incision formed therein that presses vertically against a protruding rail formed in front of the rotating block of the above-mentioned tilting unit; A rotating body formed to pivotally connect with the other end of the assembly block opposite the above-mentioned cut section, and arms extending to both sides centered on the rotating body; and A non-destructive inspection device for water pipes characterized by including a fastener provided at the end of the arm and securing the holder unit.
In claim 1, The above holder unit is A receptacle with an open bottom and a space formed inside to accommodate the probe; A lifting body that moves up and down inside the above receptor and is equipped with the above probe; A control knob that penetrates the upper surface of the receptacle and is exposed to the outside while screw-fastened to the upper surface of the lifting body; and A non-destructive inspection device for water pipes characterized by including a contact portion provided at the lower part of the above-mentioned receptor and in contact with the surface of the above-mentioned pipe.
In claim 1, The above holder unit is A receptacle with an open bottom and a space formed inside to accommodate the probe; A lifting body that moves up and down inside the above receptor and is equipped with the above probe; An elastic member having an elastic restoring force interposed between the above-mentioned elevator body and the receptor; and A non-destructive inspection device for water pipes characterized by including a contact portion provided at the lower part of the above-mentioned receptor and in contact with the surface of the above-mentioned pipe.
In claim 1, The above holder unit is A receptacle with an open bottom and a space formed inside to accommodate the probe; A lifting body that moves up and down inside the above receptor and is equipped with the above probe; An actuator installed between the above-mentioned lifting body and the receiver, wherein the rod extends and retracts from the cylinder; A contact portion provided at the lower part of the above receptor and in contact with the surface of the above pipe; and A non-destructive inspection device for water pipes characterized by including a sensor provided in the contact portion that measures the distance between the surface of the pipe and the bottom surface of the contact portion and controls the operation of the actuator.
In any one of claims 10 to 12, A non-destructive inspection device for water pipes, characterized in that the lifting body has a locking projection formed therein to catch the probe, and the lifting body and the probe are integrally formed.
In any one of claims 10 to 12, The above contact part A non-destructive inspection device for water pipes characterized by having a roller provided on a surface facing the surface of the pipe, wherein the roller performs a rolling motion along the surface of the pipe.
In any one of claims 10 to 12, The above contact part A non-destructive inspection device for water pipes characterized by having an air port that blows pressurized air toward the surface of the pipe or sucks in foreign matter from the surface of the pipe.
In any one of claims 10 to 12, The above contact part A brush that rotates while in contact with the surface of the pipe; and A non-destructive inspection device for water pipes characterized by including a sensing unit that detects foreign substances on the surface of the pipe and controls the operation of the brush.

Description

Non-destructive inspection device for water supply pipes The present invention relates to a non-destructive inspection device for water pipes, and more specifically, to a non-destructive inspection device for water pipes that can accurately identify the location of a defect by etching the part where a defect occurred when inspecting the inside of a pipe using an ultrasonic testing device after lining processing has been performed for the rehabilitation of an aging pipe, and thereby enable lining processing to be performed at the location where the defect occurred. Generally, medium- and large-diameter water pipes and small-diameter waterworks pipes supplying tap water, oil pipes and gas pipes transporting various fluids such as oil, and sewage pipes transporting sewage (hereinafter collectively referred to as "pipes"), when used for a long time after installation, deteriorate. During this process, various foreign substances contained in the fluid accumulate on the inner walls of the pipes, or the inner surfaces of the pipes oxidize, causing rust to form, which then solidifies to form a scale layer. As described above, the scale layer formed on the inner surface of the fluid pipe gradually thickens and solidifies over time, which obstructs the smooth flow of the fluid and causes a decrease in fluid pressure. In addition, the scale layer attached to the pipes dissolves into the fluid, causing contamination of the fluid and significantly hindering the maintenance of the pipe network's function, as well as leading to serious consequences such as increased energy consumption, so the pipes must be cleaned periodically. Therefore, improvement work (replacement or rehabilitation) on aging pipes is carried out to resolve issues such as corrosion products inside the pipelines and pipe damage. Representative rehabilitation methods for aging pipelines applied in pipeline improvement projects include pipe cleaning and lining. A method for rehabilitating such aging pipelines will be explained with reference to Fig. 1. Figure 1 is a flowchart showing a typical aging pipeline rehabilitation process. Referring to the drawings, the process comprises a first process (S1) for inspecting the interior of the pipeline; a second process (S2) for cutting and opening the pipe after shutting off the water supply, dividing the length of the aging pipe into sections of approximately 60 to 80 meters, and repeatedly pulling a pipe cleaning device such as a scraper, wire brush, or high-pressure water spray cleaner with a power winch to remove scale attached inside the pipe and discharge it outside the pipe; a third process (S3) for drying the interior of the pipe by transferring air with a blower after removing the water accumulated inside the pipe; a fourth process (S4) for performing lining by inserting a hose equipped with a spray head into the pipe body and spraying epoxy resin paint or polyurea while moving the spray head outside the pipe body once the surface inside the pipe is dry; and a fifth process (S5) for completing the rehabilitation work by cleaning the interior of the pipe after the epoxy paint or polyurea has fully cured, connecting the cut sections of the pipe to allow water flow, and filling with soil in accordance with regulations. It is accomplished. After the rehabilitation method described above, ultrasonic testing equipment is used to inspect the paint lining inside the pipe for peeling, thickness, and pore formation, and based on the results, the lining is reworked for the problematic areas. However, in order to redo the lining work on the problematic parts after inspecting the inside of the pipe using ultrasonic testing equipment as described above, the inspector manually records the location of the problematic part of the lining work on a record sheet, or marks the surface of the lining with a marking pen, based on the distance from the end of the pipe to the defective part. However, as mentioned above, when an inspector manually records the defective parts on the record sheet, there is a problem in that it is difficult to accurately identify the location of the defective parts. In addition, when an inspector marks a defective area with a marking pen, there is a problem in that the marking is erased by high-pressure water when the defective area is re-lined, making it impossible to accurately identify the location of the defect. Furthermore, since pipelines are buried underground, significant external forces are applied to them in the event of sinkholes caused by earthquakes or heavy rainfall. As a result, the shape of the pipeline deforms (crashes), causing the curvature to change from that of the original construction. As such, since the parts of the pipe with deformed curvature are subject to external forces, they are inevitably vulnerable to such forces and are at risk of eventually breaking. In particular, inspection is difficult when the pipe's curvature is slightly deformed, as the inspector cannot visuall