KR20200048328A - Nondestructive test system for underground water well - Google Patents

Abstract

According to the present invention, provided is a nondestructive inspection system for a groundwater tube well. The nondestructive inspection system includes: a cable winder installed outside a groundwater tube well and including a distance integrating meter; a nondestructive measurement part inserted from the winder into a well material inside a groundwater tube well through a cable, and including a waterproof and dustproof housing connected to one end of the cable, a circuit part installed in the housing, an ultrasonic wave generation part, a water quality sensor part and an image photographing part; a first monitor installed outside the groundwater tube well, and displaying an ultrasonic image received from the ultrasonic wave generation part and a second monitor displaying a general image received from the image photographing part; and an integrated control part installed outside the groundwater tube well, and editing the ultrasonic image and the general image to output the edited images through the first and second monitors and controlling the speed of the winder for dropping and raising the cable. Therefore, the nondestructive inspection system is capable of identifying a location where polluted water is produced without local punching work.

Description

Nondestructive test system for underground water wells

The present invention relates to an inspection system for an underground water well, and in detail, information such as water vein, fracture layer, strata inside the ground water well through non-destructive measurement without additional work such as taking out or destroying well materials inside the ground water well. We propose a new system that can accurately check.

Groundwater is used as a main water resource along with surface water such as river water as rainwater or snow that has fallen into the ground and is standing or flowing through the ground. Recently, groundwater is used as emergency water or alternative water resources to prepare for drought caused by climate change. The value is increasing.

In order to supply water for agriculture, industry, etc., and living water for farming and fishing villages, a well is drilled in the ground, a casing is installed inside the well, and a water pipe is inserted into the well through the casing, and then ground water is pumped. It is a common form that is used by pumping. Therefore, the groundwater flowing between the rocks is collected in the well through the rock hole, and the groundwater collected in the well is forcibly sucked by the operation of the submersible motor pump and then supplied to the water supply pipe along the pumping pipe.

Groundwater has great utility in that it can secure safe water at low cost in a short period of time. However, if the water quality is deteriorated due to excessive use of groundwater than the amount replenished by rain water or the infiltration of contaminants, it takes a long time and effort to recover and recover. Therefore, after developing the groundwater, it is important to continuously manage the groundwater wells to prevent contamination of the groundwater wells and to provide a stable water supply without causing water shortage problems.

To this end, when the first well is developed, a video is taken using a CCTV imaging machine, etc. to check the ground layer inside the well or the vein layer through which water flows, and the stored water is installed inside the well (PVC or stainless steel casing pipe). It can be used for city management or for future management. In the case of the first well development, the inside of the well is photographed i) When the well is drilled and the casing pipe (inner well material) is not installed (see Fig. 1), the camera is inserted into the well to introduce the inside surface of the well 1 Secondary shooting, ii) After inserting and installing the inner well material (P) into the well (see Fig. 2), the camera is put inside the well material to take a second shot of the inner surface of the well material, and save and utilize each video material Is to do.

According to the registered utility model 20-0201646, after the development of groundwater, it can be inserted into the groundwater hole to check the exact depth and condition of the pipe for preventing collapse and pollution, and to check the inflow location and presence of the contaminated water with the naked eye on the site. In addition, it is possible to record and preserve problems that have been confirmed only with conventional formal documents and external photographs by using the VTR, reducing complaints between the client and the client, and using the video transmitter to save the time of the client and the owner. We proposed a groundwater inspection system that can save and use the screen in the underground waterway to assist in the study of ecology and management of underground resources. Specifically, a small camera is built-in and a lower photographing unit for photographing the lower portion of the underground water hole through the transparent plate in front; Comprising a compass, a rudder to detect the flow of water, and a surface water presence detection device unit configured to detect the presence or absence of surface water flowing from outside of the underground water hole; A small-sized camera built-in side photographing unit for photographing the inner wall of the underground water hole through a transparent tube; We proposed an underground water testing system that consists of a video transmission device that checks the camera's photographs from the outside.

However, the previously proposed method of imaging is based on the premise that the image is taken in the undrilled state during the development of the first underground water well. The disadvantage is that if the material is installed, it cannot be checked outside the well material). In this case, even if a post-image of the well material is installed, the vein layer or crushed layer (the depth of the water, F in FIG. 1), the location of the ground layer, etc., between the inside of the well and the outside surface of the well material Since the thickness of the grouting input to the camera is not known, there is a limit to checking the location of the polluted water and taking the relevant measures.

If, after the development of the groundwater well, a source of contamination in adjacent areas, such as livestock wastewater or pesticide components, has become unsuitable for water quality, it may be possible to take a method of inspecting the well inside by lifting all the well materials inside the well. However, the risk of lifting well materials is high, and in this process, groundwater wells may collapse. In view of this risk, it is possible to find a way to drill several holes in the longitudinal direction on the surface of the inner well material at any location inside the groundwater well, and conduct individual water quality inspections at that location, but in this case the entire process is complicated. However, while the operation time is long and the accuracy of the location of the pollutant is poor, the cost of the operation is excessively increased and the risk required for water quality inspection inside the well is still unable to solve the big problem.

Numerous groundwater wells have been developed nationwide, and in order to continuously manage the water quality of the groundwater wells in the state where the video data of the wells are mostly incomplete, the location of water vein, crushed layer, and strata with well materials inserted inside the wells There is an urgent need for a technology that can accurately check and regularly check the level of contamination.

The present invention was created under the above-mentioned technical background, and an object of the present invention is to provide a new method for identifying water vein layers, crushed layers, and strata from which water comes out when an internal well material is installed in an underground water well. .

Another object of the present invention is to provide a non-destructive inspection system of a groundwater well that can grasp the location of contaminated water, etc. without lifting the internal well material installed inside the groundwater well to the outside or performing local perforation work on the inner well material. .

Another object of the present invention is to provide an inspection system capable of continuously and accurately grasping the presence or absence of contaminated water in the groundwater well to continuously manage the water quality of the groundwater well.

Other, other objects and technical features of the present invention will be presented in more detail in the following detailed description.

In order to achieve the above object, the present invention is installed on the outside of the ground water well and the cable winder including a distance totalizer; As a non-destructive measurement unit that is injected into the well material inside the groundwater well through the cable from the winder, a waterproof and dustproof housing connected to one end of the cable, a circuit unit mounted inside the housing, an ultrasonic generator, a water quality sensor unit, and image taking A non-destructive measurement unit including a unit; A first monitor installed outside the groundwater well and a second monitor displaying an ultrasound image received from the ultrasound generator and a general image received from the image capture unit; A non-destructive inspection system for groundwater wells, including an integrated control unit installed outside the groundwater well and editing the ultrasound image signal and the general image to output them to the first monitor and the second monitor respectively and controlling the cable descending and rising speed of the winder. Gives

In the present invention, the ultrasonic generator is preferably a plurality of probes are disposed radially inside the waterproof dustproof housing so as to be able to photograph the 360 ° omnidirectional of the groundwater well, in this case, the ultrasonic signal transmitted from the plurality of ultrasonic probes It is received by the integrated control unit and edited and output as one ultrasound image.

In addition, in the present invention, it is preferable that the circuit part mounted inside the waterproof dust-proof housing, the ultrasonic generator, the water quality sensor part, and the image capturing part are connected to each other so as to be detachable.

In the non-destructive inspection system of the groundwater well of the present invention, the non-destructive measurement unit may further include a marking device displaying a corresponding position on the surface of the well material when a vein layer or an abnormal section is identified during ultrasound imaging.

In addition, in the non-destructive inspection system of the groundwater well of the present invention, the water quality sensor unit detects a water temperature sensor for measuring the change in the water temperature inside the groundwater well, a sound sensor capable of detecting the sound falling from the water vein layer inside the groundwater well, and grasps the groundwater flow. It may further include a gyro sensor.

In addition, in the non-destructive inspection system of the groundwater well of the present invention, it is mounted on the non-destructive measurement unit, and may further include an underwater motor pump for sampling a water quality inside the groundwater well.

According to the present invention, a non-destructive inspection of a ground water well is conducted by combining an ultrasonic imaging technique and a technique for inputting an observation device or an inspection device to a ground water well and obtaining a desired measurement value, etc., and for this purpose, a probe, water quality for obtaining an ultrasound image Includes multi-purpose inspection sensor, general imaging equipment, waterproof dustproof housing to insert non-destructive measurement unit inside the well, and additionally necessary configuration while solving problems of products that may occur when using non-destructive measurement unit into actual well By adding more wealth, the inspection level and efficiency of groundwater wells are improved.

Through the non-destructive inspection system of the present invention, it is possible to check the vein layer from which water comes out while the internal well material is installed in the well, and the contaminated water without lifting the internal well material to the outside or performing a local perforation work on the well material It is possible to grasp the location of occurrence of the.

According to the present invention, it is possible to accurately check the location corresponding to the cause of the pollutant, such as deterioration of water quality, by comparing the ultrasound image on the inside of the well and the general image on the inside of the well material, and marking the location of collecting and checking the quality of the polluted water This is possible, and it is possible to check whether the water vein layer, the fracture layer, and the stratum are classified according to the change in the temperature of the groundwater or the flow of the groundwater, which can not only increase the inspection level and efficiency of the groundwater well, but also contribute to continuously managing the water quality of the groundwater well. Can be.

1 is a schematic diagram showing the uneven state of a groundwater well constructed under the ground
Figure 2 is a schematic diagram after the well material is inserted into the groundwater well
Figure 3 is a schematic view showing a state in which the non-destructive testing system of the present invention is put into the well of the groundwater
Figure 4 is a schematic view showing a non-destructive measurement unit of the non-destructive inspection system
5 is a schematic cross-sectional view showing a state in which the probe of the ultrasonic generator is radially arranged.
Figure 6 is a schematic view showing the connection of the non-destructive measurement component components
7 is a schematic diagram showing an image output and a control unit of a non-destructive inspection system
8 is a schematic view showing a non-destructive measurement unit coupled to an underwater motor pump
9 is a schematic view showing a marking device

The present invention proposes an inspection system for ground water wells using ultrasonic waves. By acquiring ultrasound image scan information and general image information from a non-destructive measurement unit that includes an ultrasonic probe inserted inside the groundwater well, it outputs and compares the inside of the well or the inside of the well and the inside of the well material, and compares it. It is possible to accurately inspect the groundwater wells without multiple perforations.

Groundwater wells are formed by excavating below the ground (G) as shown in FIG. 1 using drilling machines and compressors, etc., but the depth of the wells varies depending on small, hollow, and anti-aircraft but at least 20m to more than 500m. In some cases. Inside the excavated well, the groundwater flowing through the crushing layer (F) connected to the groundwater vein collects and the natural water level (UW) of the groundwater is formed at a certain depth inside the well. As shown in FIG. 2, the well of a pipe or an inner well material P in the form of a pipe made of stainless steel is inserted into a well-shaped well, and a plurality of pipes are coupled by a connection socket part P1 to correspond to the depth of the well. And the natural water level is provided inside the well material by introducing the groundwater flowing from the water vein layer of the well into the well material through the perforated portion P2.

If there are houses, farms, factories, etc. near the groundwater wells, livestock manure, pesticides, and factory wastewater may be introduced. In particular, when rainwater is connected to the vein layer, which is the passage through which the rainwater enters the basement, the groundwater in the well can be easily contaminated. However, it is quite difficult to check which water layer is contaminated from deep water wells of more than 100 meters, and it is impossible to manage the water quality of underground water wells because there is no proper inspection device, and there is no choice but to neglect or close closed water wells. There is no situation.

The present invention can assist in the management of groundwater wells and solving water pollution by non-destructively confirming whether a source of contamination occurs inside the groundwater well, and the depth and location of the source.

Figure 3 is a schematic view showing a state in which the non-destructive inspection system of the present invention is put into the well of the ground water, the present invention includes a non-destructive measurement unit 100 is introduced into the ground water well by a cable. (Although the groundwater well is generally formed with a structure in which the vertical depth is considerably longer than the diameter of the well because the actual depth is 100 m or more, the groundwater well shown in FIG. 3, including the aforementioned FIGS. 1 and 2, is vertical length for convenience. Is expressed in short.) When the cable is released from the take-up 200 installed on the outside of the groundwater well, the non-destructive measurement part is pulled through the pulley (D) and is inserted in the depth direction inside the well to descend to the bottom of the well and wind the cable. It rises to the top of the well, and the length of the cable unwinding or winding is measured by measuring the unwinding or winding length of the cable through the distance totalizer included in the winder. The input depth of the non-destructive measurement unit is very important for confirming the location of water pollution inside the well, and is directly related to the water collecting position of the underwater motor pump and the marking position of the marking device, which will be described later.

The cable that extends from the winder and connects to the non-destructive measurement unit can use, for example, a waterproof material with an outer diameter of about 5 to 10 mm. Inside the cable, a metal wire for supporting the weight of its own weight is embedded and a waterproof dust-proof housing. A wire cable for transmitting and receiving a negative signal is also incorporated. Various information received from the cable of the winder is processed by the image output and control unit 300 installed outside the groundwater well and converted into images or data necessary for grasping water pollution.

The non-destructive measurement unit, which is introduced into the well material inside the groundwater well through the cable from the winder, includes a waterproof dustproof housing and various components mounted inside the housing. 4 is a schematic view showing a non-destructive measurement unit of a non-destructive inspection system, in which the circuit unit 130, the ultrasonic generator 140, the water quality sensor unit 150, and the image capturing unit 160 are stacked on each other inside the waterproof and dustproof housing 110. It is. The circuit unit includes circuits for electrical and electronic operations required for each component, and the ultrasonic generator includes a probe type ultrasonic transmitter and receiver. The water quality sensor unit may detect dissolved oxygen amount, heavy metal, turbidity, color, and the like by an electrical, chemical, or optical sensor, and may further include a temperature sensor, a sound sensor, and a pH sensor. A part of the water sensor part may be exposed outside the housing to make direct contact with groundwater.

The water quality sensor unit may further include a water temperature sensor for measuring the change in the water temperature inside the well of the ground water well and a gyro sensor for detecting the flow of the ground water, and the water temperature sensor detects the standing water (high temperature) and the flowing water (low temperature) to form the water vein layer. It can help to confirm the location of the sound sensor, the sound sensor can detect the sound of falling from the water vein layer inside the underground water well, and can detect the location of the water vein layer by detecting the flow of ground water through the gyro sensor.

The waterproof and dustproof housing connected to one end of the cable may include a stacked component therein, for example, a length of about 30-50 cm, and a diameter of about 10 cm. Relative positions of each component included in the housing may be mutually changed, and the imaging unit is preferably disposed on the lower surface of the housing to facilitate observation of the side and the bottom of the well.

The image photographing unit is related to a general camera image, and for this purpose, a lens 161 or an imaging device is mounted on the lower surface or side of the housing, and the inside of the well is photographed through a transparent material cover, etc., and natural light is not irradiated inside the well. Considering a situation in which it is not possible, an illumination 162 such as an LED is added to the vicinity of the lens.

The vein layer can exist in various directions and at different depths inside the groundwater well. Therefore, the non-destructive measurement unit should be able to inspect in all directions as well as the input depth. To this end, in the non-destructive inspection system of the present invention, it is preferable that a plurality of probes are radially disposed inside the waterproof dustproof housing so that the ultrasonic generator can photograph a 360 degree omnidirectional direction of the groundwater well. 5 is a schematic cross-sectional view of a probe in which the ultrasonic generator is radially arranged, and the plate-shaped ultrasonic probe 141 is disposed in four directions so as to face a well in the ultrasonic generator 140. Each probe transmits and receives ultrasonic waves in a corresponding direction, transmits each ultrasonic information to the integrated control unit, and integrates multiple ultrasonic information to be edited and output as one ultrasonic image. The shape of the probe may be formed as a curved surface along the inner circumferential surface of the ultrasonic generator, and if necessary, at least two or more probes may be uniformly disposed.

In the present invention, it is preferable that the circuit part mounted inside the waterproof dust-proof housing, the ultrasonic generating part, the water quality sensor part, and the image capturing part are mutually connected to be detachable. Figure 6 is a schematic view showing the connection of components of the non-destructive measurement unit, for example, when the ultrasonic generator 140 and the water quality sensor unit 150 are connected, the two components are connected to each other through a pin connector (C), electrical signals, etc. This can be transmitted, and can be physically coupled detachably by the fastener C1 and the thread C2. When the two components are combined, the O-ring (R) or the like is embedded in the coupling surface to minimize physical impact and facilitate mutual separation. Various methods, such as screwing or detachable insertion, may be employed for the coupling of each component part embedded in the housing. It is easy to separate, replace, repair, and manage each component through the method of combining the internal components of the housing, and additional inspection elements can be easily added according to the internal situation of the groundwater well or the degree of water pollution.

7 is a schematic diagram showing an image output and a control unit 300 of a non-destructive inspection system. The image output and control unit is related to the processing of various image information and sensing information transmitted from the cable, and includes a first monitor 311 and a second monitor 312 and an integrated control unit 320 installed outside the groundwater well. . The first monitor displays the ultrasound image received from the ultrasound generator, and the second monitor displays the general image received from the image capture unit. The ultrasound image output to the first monitor corresponds to an image in which the inner surface of the well outside the well material and the transmission region inside the well are observed, and the general image output to the second monitor corresponds to an image of the inner surface of the well material. By outputting the ultrasound image and the general camera image as described above, it is possible to more accurately and quickly grasp the inner structure of the well or to identify the location of water pollution by comparing the images of the inner and inner wells of the groundwater well and the inner surface of the well. The integrated control unit edits the ultrasound image signal and the general image, outputs them to the first monitor and the second monitor, respectively, and controls the cable descending and rising speed of the winder. The integrated control unit may further include a signal amplifier, an image storage and an external transmission unit (Bluetooth communication unit, memory, USB connector, etc.) in addition to ultrasonic reception and image editing and data display of the composite sensor.

The inspection of the groundwater well through the non-destructive inspection system of the present invention is as follows. Release the cable from the winder through the opening at the top of the well and insert the non-destructive measurement into the well. While descending to the inside of the well, the ultrasound generating unit, the water quality sensor unit, and the image capturing unit in the waterproof and dustproof housing respectively acquire and detect image information. Normally, when the depth of a well reaches several tens of meters to hundreds of meters, and as a result, as the input depth increases, the length of the cable administered deep in the well increases, signal strength, etc. may decrease due to signal cable resistance. By providing, it is possible to cope with a decrease in signal strength. It is input into the well and acquires general image information of the inner surface of the well material through the image capture unit, and acquires the image information of the inner surface or inside of the well (stratum or water vein) that penetrates the well material through the ultrasonic generator. In this case, the ultrasonic signal may be controlled by the integrated control unit in order to adjust the permeability according to the well material (PVC, metal) inside the well.

The obtained information can be processed in real time. The information that can be checked on the monitor is provided with an ultrasound image and a general image, respectively. In addition, the input depth and the data value for each water quality sensor (for example, water temperature, pH, electrical conductivity) from the cable length calculated through the distance totalizer of the winder. , DO sensor, nitrogen sensor, etc.) can be displayed numerically or graphically. Through this information and data, it is possible to check the structure of the formation formed on the outside of the well material of the groundwater well, or the location of the vein layer into which the groundwater flows.

In addition, it is possible to determine whether the groundwater is contaminated from the water quality sensor unit, or the location of water pollution from the distance totalizer, in which case it is necessary to more accurately measure the groundwater quality at the location, and for this purpose, the non-destructive inspection system of the present invention is not suitable for water quality. It may further include groundwater collection equipment for sampling. This water collection equipment may be input to the well of the groundwater separately from the non-destructive measurement unit, but it is advantageous for depth control and location determination of pollutants by combining the two devices and putting them inside the well with one body. 8 is a schematic view showing a non-destructive measurement unit coupled to the submersible motor pump 170, the submersible motor pump is disposed on the top of the non-destructive measurement unit, in this case, the cable for signal transmission along with the cable for signal transmission to the cable 121 of the non-destructive measurement unit Can be built together.

The submersible motor pump for sampling the water quality inside the groundwater well can operate to collect the groundwater at the location when the non-destructive measurement part is photographed by ultrasound image to check the water vein layer or abnormal section or if water quality contamination is detected by the water quality sensor part. , In order to confirm the change in water quality according to the depth of the well, a sample of groundwater may be uniformly collected for each depth.

If an abnormal element in the groundwater well is detected or the location of the vein layer or crushed layer into which a pollutant is introduced is determined, it is necessary to take action on the well material and well at the location. Such additional measures may include, for example, inserting a waterproof material that prevents the inflow of pollutants after drilling the well material at the location, and marking is required to determine the location when performing a subsequent operation after non-destructive inspection. Can be. To this end, the non-destructive inspection system of the present invention further includes a marking device that displays an appropriate location on the surface of the well material when an image of the vein layer or an abnormality is checked or water quality is detected by the water sensor unit by photographing an ultrasound image from the non-destructive measurement unit. can do. 9 is a schematic view showing the marking device 180, the marking device may include, for example, a cylinder 181 and a marking portion 183 exposed on one side of the cylinder, and the pressure on the cylinder through the hydraulic line 182 By applying this, the marking portion can be advanced to the inner surface of the well material to mark the required position. The marking device is attached to the upper end of the waterproof dust-proof housing in the same manner as the above-described underwater motor pump, and can be introduced into the groundwater well together with the non-destructive measurement unit. In addition, if necessary, it may be mounted in a state of being laminated with other components inside the waterproof dust-proof housing.

As described above, through the non-destructive inspection system of the groundwater well of the present invention, it is easy to acquire image information and water quality data inside the groundwater well, and it is possible to accurately check the location of the water vein or crushed layer and to determine whether the water is polluted or not and where it is polluted. Accurate water quality inspection is possible at the location, and post measures such as blocking of pollutants can be effectively performed by perforating well materials.

The present invention has been exemplarily described through preferred embodiments, but the present invention is not limited to such specific embodiments, and various forms within the scope of the technical idea suggested in the present invention, specifically, the scope of the claims. Can be modified, changed, or improved.

100: non-destructive measurement unit 110: waterproof and dustproof housing
120, 121: cable 130: circuit
140: ultrasonic generator 141: ultrasonic probe
150: water quality sensor unit 160: video recording unit
161: lens 162: lighting
170: submersible motor pump 180: marking device
181: cylinder 182: hydraulic line
183: marking unit 200: cable winder
300: video output and control unit 311: monitor
312: second monitor 320: integrated control unit

Claims (5)

Cable winding machine installed outside the groundwater well and including a distance totalizer,
As a non-destructive measurement unit that is injected into the well material inside the groundwater well through the cable from the winder, a waterproof and dustproof housing connected to one end of the cable, a circuit unit mounted inside the housing, an ultrasonic generator, a water quality sensor unit, and imaging Non-destructive measurement unit including a part,
A first monitor installed outside the groundwater well, a second monitor displaying an ultrasound image received from the ultrasound generator, and a second monitor displaying a general image received from the image capture unit;
It is installed outside the groundwater well and includes an integrated control unit that edits the ultrasound image signal and the general image, outputs them to the first monitor and the second monitor, respectively, and controls the cable descending and rising speed of the winder.
The ultrasonic generator is provided with a plurality of probes radially disposed inside a waterproof dustproof housing so as to photograph a 360-degree omnidirectional direction of the groundwater well, receiving the ultrasonic waves transmitted from the multiple ultrasonic probes from the integrated controller, and editing them into a single ultrasonic image. Characterized by outputting
Non-destructive testing system for groundwater wells.
According to claim 1,
A non-destructive inspection system for groundwater wells, characterized in that the circuit part, the ultrasonic generator, the water quality sensor part, and the image capturing part, which are mounted inside the waterproof dust-proof housing, are connected to each other to be detachably connected.
According to claim 1,
The non-destructive measurement unit further comprises a marking device for marking a location on the surface of a well material when a vein layer or an abnormal section is identified when an ultrasound image is taken.
According to claim 1,
The water quality sensor unit further comprises a water temperature sensor for measuring the change in water temperature inside the ground water well, a sound sensor capable of detecting the sound falling from the water vein layer inside the ground water well, and a gyro sensor for detecting the flow of ground water. Non-destructive testing system for groundwater wells.
According to claim 1,
Mounted on the top of the non-destructive measurement unit, the non-destructive inspection system of the groundwater well, characterized in that it further comprises an underwater motor pump for sampling the water quality inside the well.

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