Drain pipe leak detection method and system

Abstract

The present invention belongs to the technical field of water pipe leakage detection, and specifically relates to a method and system for leak detection of drainage pipes. The specific system includes: an inflation device, a controller, a frame, a water tank and a detection frame. A feed port and a discharge port are provided at both ends of the water tank. The diameters of the feed port and the discharge port match the diameter of the drainage pipe. The detection frame is located directly above the water tank. A vibration sensor is provided on the detection frame. The number of vibration sensors corresponds to the number of ripples in the drainage pipe in the water tank. A first touch switch is provided at the discharge end of the water tank, and the first touch switch is electrically connected to the controller. The controller is used to receive the value of the vibration sensor and control the marking machine to mark. This scheme detects the leakage point of the drainage pipe by discharging gas from the leakage point of the drainage pipe, generating bubbles in the water, and causing the signal of the vibration sensor corresponding to each ripple of the drainage pipe to change accordingly. The leakage point of the drainage pipe can be detected quickly; the first touch switch is used to conveniently control the automatic marking of the leakage point of the drainage pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of water pipe leakage detection, and in particular relates to a drainage pipe leakage detection method and system. Background Art

[0002] Drain pipes are mainly used for drainage, and are divided into plastic drain pipes, concrete pipes (CP) and reinforced concrete pipes (RCP).

[0003] The application number CN202021098934.0 discloses a water pipe leak detector, one end of the water pipe is sealed, and the other end is open. The open end of the water pipe is provided with a sealing block, and the sealing block is connected to a push-inflating device for sealing the sealing block at the open end of the water pipe and inflating the water pipe. The area of ​​the sealing block is larger than the area of ​​the open end of the water pipe. The push-inflating device is connected to an air pressure detector, providing a water pipe leak detector with simple operation and simple process. The above scheme tightly seals and inflates both sides of the water pipe, and then observes the changes in the air pressure detector. After the above scheme is completed, the water pipes are classified and processed. When repairing a leaking water pipe, it is only possible to know whether a leak occurs, but it is impossible to know where the leak occurs. It is necessary to re-detect the leak point and mark it, and the repair work will be more troublesome. Summary of the invention

[0004] The present invention provides a drainage pipe leakage detection method and system with automatic marking.

[0005] In order to achieve the above-mentioned purpose, the present invention also provides a drainage pipe leakage detection system, including an inflation device and a controller; and also includes: a frame; a water tank and a marking machine for marking the drainage pipe are arranged on the frame, and a feed port and a discharge port are arranged at both ends of the water tank; the diameters of the feed port and the discharge port are matched with the diameter of the drainage pipe; a detection frame is arranged on the frame, and the detection frame is located directly above the water tank; a vibration sensor is arranged on the detection frame; a first touch switch is arranged at the discharge end of the water tank, and the first touch switch is fixedly installed on the inner wall of the water tank, and the first touch switch is connected to the controller The device is electrically connected; the corrugation of the drain pipe can touch the first touch switch; sealing plugs are provided at both ends of the drain pipe, and a through hole is provided at the sealing plug, and a valve is provided at the through hole; the inflation device is located at the feed end of the water tank, and the inflation device is connected with the through hole of the sealing plug; the controller is fixedly installed on the frame; the controller is used to receive the value of the vibration sensor, obtain the vibration sensor number of the signal change according to the value of the vibration sensor, and control the marking machine to mark the corrugation position of the drain pipe according to the corrugation position of the drain pipe corresponding to the vibration sensor number of the signal change.

[0006] The principle of this scheme is as follows: put the drain pipe into the water tank from the feed port of the water tank, make one end of the drain pipe located at the discharge port of the water tank, then inject water into the water tank so that the water covers the surface of the drain pipe, and inject gas into the drain pipe. When there is a leak in the drain pipe in the water tank, bubbles will be generated in the water tank. The bubbles will change the vibration signal of the vibration sensor corresponding to the ripples of the drain pipe. The controller uses the Hanning window to process the vibration sensor signal. Under normal conditions, water fluctuations will cause changes in the vibration sensor. The vibration sensor signal processed with the Hanning window will not fluctuate. When bubbles are generated, the vibration sensor signal processed with the Hanning window will change. Then obtain the changed part of the processed vibration sensor signal. If the collected part has changed, obtain the ripple number corresponding to the vibration sensor with the signal change, and then enable the conveyor belt to move the drain pipe. The drain pipe touches the first touch switch, and the controller counts the ripples of the drain pipe according to the first touch switch signal. When the ripple number of the drain pipe corresponds to the obtained leakage ripple number, the controller enables the marking machine to mark the leakage ripple number of the drain pipe. When the maximum value of the drain pipe ripple number obtained by the controller is the same as the number of vibration sensors, the controller controls the drain pipe ripple number to be cleared and performs the next set of counting marks.

[0007] The beneficial effects of this solution are as follows: this solution detects the leakage point of the drain pipe by discharging gas from the leakage point of the drain pipe, generating bubbles in the water, causing corresponding changes in the signal of the vibration sensor corresponding to each ripple of the drain pipe, and can quickly detect the leakage point of the drain pipe; the first touch switch is used to conveniently control the automatic marking of the leakage point of the drain pipe; this solution can cut the pipe after the drain pipe is inspected, the number of times the connection between the drain pipe and the inflation device is replaced is reduced, and the detection efficiency is high.

[0008] Furthermore, a pipe cutter and a conveyor belt are provided at the discharge end of the water tank; the conveyor belt is located between the water tank and the pipe cutter; the pipe cutter is fixedly mounted on a frame; a second touch switch is provided on the pipe cutter, and the second touch switch is electrically connected to a controller; the corrugation of the drainage pipe can touch the second touch switch; the pipe cutter switch is electrically connected to a controller. The corrugation of the drainage pipe is counted by touching the second touch switch with the corrugation of the drainage pipe, so that the controller enables the pipe cutter to cut the drainage pipe according to the specific drainage pipe length requirement.

[0009] Furthermore, the inflation device includes an air source and an air inlet pipe, the air source is connected to the air inlet pipe, and a control valve is provided at the connection point between the air source and the air inlet pipe; a filter is provided on the air source, and the filter is an oil mist separator or an air dryer. The filter dries the air and prevents water or oil from mixing into the equipment, causing equipment failure and resulting in inaccurate detection results of the drain pipe.

[0010] Furthermore, the air inlet pipe is far away from the air outlet of the air conditioner, so as to prevent the condensation of water droplets in the connecting pipe due to the temperature difference, and to prevent the equipment failure from causing inaccurate detection results of the drainage pipe.

[0011] Furthermore, it also includes a current transmitter for changing the working current of the vibration sensor, the current transmitter is electrically connected to the vibration sensor, and the current transmitter is electrically connected to the controller; an electromagnet and a magnet are provided between the current transmitter and the vibration sensor; the electromagnet and the magnet are both provided with a conductive sheet for connecting the current transmitter and the vibration sensor; the conductive sheet is in contact when the electromagnet and the magnet attract each other; the electromagnet control switch is electrically connected to the controller. When the controller detects that the current delivered by the current transmission is not within the set working current range, the controller controls the electromagnet to cut off the power, separate the conductive sheet, stop the vibration sensor from working, and protect the vibration sensor.

[0012] Furthermore, an alarm is provided on the frame, and the alarm is electrically connected to the controller. When the controller detects that the vibration sensor signal changes, the controller controls to turn on the alarm to remind the staff that there is a leak in the drainage pipe.

[0013] In order to achieve the above purpose, this solution also provides a drainage pipe leakage detection method, which specifically includes the following specific steps:

[0014] Step 1: Use sealing plugs to seal both ends of the drain pipe, put the drain pipe into the water tank from the feed inlet of the water tank, make one end of the drain pipe located at the discharge port of the water tank, and inject water into the water tank;

[0015] Step 2: Use the inflation device to fill the drain pipe with gas through the sealing plug. The controller processes the vibration sensor signal through the Hanning window to obtain the vibration sensor number and timer time of the signal change; if the vibration sensor number with signal change is not obtained and the timer time does not exceed the set detection time, the controller controls the timer to be reset and performs subsequent drain pipe detection; if the vibration sensor number with signal change is obtained, the controller controls the trigger delay time and turns on the alarm;

[0016] Step 3: The controller counts the drainage pipe ripple number according to the first touch switch signal to obtain the drainage pipe ripple number, and compares it with the drainage pipe ripple number corresponding to the vibration sensor number of the vibration signal change to mark the ripple part of the drainage pipe;

[0017] Step 4: The controller obtains the timer time. If the timer time exceeds the delay trigger time and the drain pipe ripple number in the controller is less than the set drain pipe ripple number, the controller controls the manual detection mark of the drain pipe.

[0018] Furthermore, in the step 1, the controller obtains the real-time current of the variable current transmitter, the controller determines whether the real-time current is within the working current range of the vibration sensor, and the controller controls the delay of the abnormal delay time to issue an abnormal working current alarm.

[0019] Furthermore, in step 2, the controller controls the alarm to sound an alarm within a set time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front cross-sectional view of an embodiment of the present invention.

[0021] Figure 2 It is a schematic top view of a detection frame and a vibration sensor according to an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the electromagnet and the magnet according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following is a further detailed description through specific implementation methods:

[0024] The reference numerals in the drawings of the specification include: a frame 1, a conveyor belt 2, a drain pipe 3, a water tank 4, a sealing plug 5, a pipe cutter 6, a detection frame 7, a first touch switch 8, a vibration sensor 9, an electromagnet 10, a magnet 11, and a conductive sheet 12.

[0025] Example:

[0026] Drain pipe measurement system, such as attached Figure 1 As shown, it includes an inflation device, a controller, a marking machine and a frame 1. The controller is a PLC controller, and the controller is fixed on the frame 1 by bolts.

[0027] A water tank 4 is provided on the frame 1, and a water valve is provided at the bottom of the water tank 4, which is convenient for controlling the filling of the water tank 4 with water and the discharge of the water in the water tank 4. A pipe is provided at the bottom of the water tank 4, and the pipe is connected to the water valve, which is convenient for collecting the water in the water tank 4 for reuse. A feed port and a discharge port are provided at both ends of the water tank 4, and the feed port and the discharge port are both circular, and the axis of the feed port and the discharge port are located on the same horizontal line. The diameters of the feed port and the discharge port are matched with the diameter of the drain pipe 3, and the drain pipe 3 can pass through the feed port and the discharge port, and the drain pipe 3 is engaged with the feed port and the discharge port, and the drain pipe 3 seals the feed port and the discharge port, reducing the water in the water tank 4 from flowing out from the feed port and the discharge port, and preventing the detection of the drain pipe 3 from being affected.

[0028] The marking machine is fixed on the frame 1 by bolts. The marking machine can be Lingrui LRL-CO210W marking machine, and the minimum font can reach 0.1mm.

[0029] The frame 1 is provided with a detection frame 7, which is fixed to the frame 1 by bolts. Figure 2 As shown, a detection plate is provided on the detection frame 7, and the detection plate is located directly above the water tank 4. Vibration sensors 9 are fixedly installed on the detection plate by bolts. The number of vibration sensors 9 corresponds to the number of corrugations of the drainage pipe 3 in the water tank 4, so as to facilitate the detection of the specific leakage position of the drainage pipe 3. The vibration sensor 9 is electrically connected to the controller.

[0030] The controller is used to receive the value of the vibration sensor 9, obtain the number of the vibration sensor 9 with signal change according to the value of the vibration sensor 9, and obtain the corrugation position of the drainage pipe 3 corresponding to the number of the vibration sensor 9 according to the signal change.

[0031] A first touch switch 8 is provided at the discharge end of the water tank 4. The first touch switch 8 is fixedly installed on the inner wall of the water tank 4 by bolts. The first touch switch 8 is electrically connected to the controller, and the corrugation of the drain pipe 3 can touch the first touch switch 8. After the controller detects the vibration sensor 9 with signal changes, when the drain pipe 3 moves and touches the first touch switch 8, the controller counts the signal of the first touch switch 8. When the count value is the same as the number of the corrugation position of the drain pipe 3 corresponding to the vibration sensor 9 with signal changes, the controller controls the marking machine to mark the drain pipe 3.

[0032] Sealing plugs 5 are provided at both ends of the drain pipe 3, and through holes are provided at the sealing plugs 5, and valves are provided at the through holes. The sealing plugs 5 are convenient for controlling and sealing the drain pipe 3. The aeration device is located at the feed end of the water tank 4, and the aeration device is communicated with the through holes of the sealing plug 5.

[0033] The inflation device includes an air source and an air intake pipe, the air source is connected to the air intake pipe, and a control valve is provided at the connection point between the air source and the air intake pipe; the air source is provided with a filter, and the filter is an oil mist separator or an air dryer. The filter dries the air and prevents water or oil from mixing into the equipment, which causes equipment failure and inaccurate detection results of the drain pipe 3. The air intake pipe is away from the air outlet of the air conditioner. Prevent water droplets from condensing in the connecting pipe due to temperature difference, which prevents equipment failure and inaccurate detection results of the drain pipe 3.

[0034] The discharge end of the water tank 4 is provided with a pipe cutter 6 and a conveyor belt 2. The conveyor belt 2 is located between the water tank 4 and the pipe cutter 6. The pipe cutter 6 is fixedly mounted on the frame 1 by bolts. The pipe cutter 6 is provided with a second touch switch. The second touch switch is electrically connected to the controller. The corrugation of the drain pipe 3 can touch the second touch switch. The switch of the pipe cutter 6 is electrically connected to the controller. The corrugation of the drain pipe 3 is counted by touching the second touch switch with the corrugation of the drain pipe 3, so that the controller enables the pipe cutter 6 to cut the drain pipe 3 according to the specific length requirement of the drain pipe 3. The feed end of the water tank 4 is also provided with a conveyor belt 2 for conveying the drain pipe 3.

[0035] It also includes a current transmitter for changing the working current of the vibration sensor 9, the current transmitter is electrically connected to the vibration sensor 9, and the current transmitter is electrically connected to the controller; as shown in the attached Figure 3 As shown, an electromagnet 10 and a magnet 11 are provided between the current transmitter and the vibration sensor 9; the electromagnet 10 and the magnet 11 are both provided with a conductive sheet 12 for connecting the current transmitter and the vibration sensor 9, and the conductive sheet 12 is in contact when the electromagnet 10 and the magnet 11 attract each other, and the electromagnet 10 controls the switch to be electrically connected to the controller. When the controller detects that the current delivered by the current transmission is not within the set working current range, the controller controls the electromagnet 10 to cut off the power, separate the conductive sheet 12, stop the vibration sensor 9 from working, and protect the vibration sensor 9.

[0036] The rack 1 is provided with an alarm, which is a sound alarm, and is fixed to the rack 1 by bolts, and is electrically connected to the controller. When the controller detects that the signal of the vibration sensor 9 changes, the controller controls to turn on the alarm to remind the staff that there is a leak in the drain pipe 3.

[0037] A timer is provided on the rack 1, and the timer is electrically connected to the controller. The controller obtains the detection time of the drain pipe 3 to control the trigger delay time, and the controller obtains the marking time of the drain pipe 3 to control the manual marking detection of the drain pipe 3.

[0038] The operation method of this scheme is as follows: seal the two ends of the drain pipe 3 with sealing plugs 5, put the drain pipe 3 into the water tank 4 from the feed port of the water tank 4, make one end of the drain pipe 3 located at the discharge port of the water tank 4, and then inject water into the water tank 4 so that the water covers the surface of the drain pipe 3. Connect the air source with the sealing plug 5 at the feed end of the drain pipe 3, and fill the drain pipe 3 with gas. When there is a leak in the drain pipe 3 located in the water tank 4, bubbles will be generated in the water tank 4, and the bubbles will cause the vibration signal of the vibration sensor 9 corresponding to the ripples of the drain pipe 3 to change. The controller uses the Hanning window to process the signal of the vibration sensor 9. Under normal conditions, water fluctuations will cause the vibration sensor 9 to change. The signal of the vibration sensor 9 processed with the Hanning window will not fluctuate. When bubbles are generated, the signal of the vibration sensor 9 processed with the Hanning window will change, and then the changed part of the processed vibration sensor 9 signal is obtained.

[0039] If the signal of the vibration sensor 9 does not change, the conveyor belt 2 is enabled to transport the drain pipe 3, and the rear part of the drain pipe 3 is detected. The controller receives the signal of the first touch switch 8 but does not count.

[0040] If there are changes in the collected data, the controller controls to extend the trigger delay time and turn on the alarm to remind the operator. The trigger delay time is the time to intermittently start the conveyor belt 2. At the same time, the controller obtains the ripple number corresponding to the vibration sensor 9 with signal changes, and then activates the conveyor belt 2 to move the drain pipe 3. The drain pipe 3 touches the first touch switch 8. The controller counts the ripples of the drain pipe 3 according to the signal of the first touch switch 8. When the ripple number of the drain pipe 3 corresponds to the obtained leakage ripple number, the controller activates the marking machine to mark the leakage ripple number of the drain pipe 3. When the maximum value of the ripple number of the drain pipe 3 obtained by the controller is the same as the number of the vibration sensor 9, the controller controls the ripple number of the drain pipe 3 to be cleared and the next set of counting marks is performed. The ripples of the drain pipe 3 touch the second touch switch to count the ripples of the drain pipe 3, so that the controller activates the pipe cutter 6 to cut the drain pipe 3 according to the specific length requirements of the drain pipe 3. The drain pipe 3 can be cut after continuous detection, which speeds up the detection efficiency of the drain pipe 3 after a single cutting.

[0041] In this solution, gas is discharged from the leakage point of the drain pipe 3, bubbles are generated in the water, and the signal of the vibration sensor 9 corresponding to each ripple of the drain pipe 3 changes accordingly, so that the leakage point of the drain pipe 3 can be detected quickly; the first touch switch 8 is used to conveniently control the automatic marking of the leakage point of the drain pipe 3; in this solution, the drain pipe 3 can be cut after detection, the number of times the connection between the drain pipe 3 and the inflation device is replaced is reduced, and the detection efficiency is high.

[0042] This solution also provides a drainage pipe leak detection method, which includes the following specific steps:

[0043] Step 1: Use the sealing plug 5 to seal both ends of the drain pipe 3, put the drain pipe 3 into the water tank 4 from the feed port of the water tank 4, make one end of the drain pipe 3 located at the discharge port of the water tank 4, and inject water into the water tank 4; the controller obtains the real-time current of the variable current transmitter, and the controller determines whether the real-time current is within the working current range of the vibration sensor 9, and the controller controls the abnormal delay time and then issues an abnormal working current alarm;

[0044] Step 2: Use the inflation device to fill the drain pipe 3 with gas through the sealing plug 5, and the controller processes the vibration sensor 9 signal through the Hanning window to obtain the vibration sensor 9 number and timer time of the signal change; if the vibration sensor 9 number with signal change is not obtained and the timer time does not exceed the set detection time, the controller controls the timer to be reset and performs subsequent drainage pipe 3 detection; if the vibration sensor 9 number with signal change is obtained, the controller controls the trigger delay time and turns on the alarm;

[0045] Step 3: The controller counts the ripple numbers of the drain pipe 3 according to the signal of the first touch switch 8 to obtain the ripple number of the drain pipe 3, and compares the ripple number of the drain pipe 3 corresponding to the number of the vibration sensor 9 of the vibration signal change to mark the ripples of the drain pipe 3;

[0046] Step 4: The controller obtains the timer time. If the timer time exceeds the delay trigger time and the ripple number of the drain pipe 3 in the controller is less than the set ripple number of the drain pipe 3, the controller controls the manual detection mark of the drain pipe 3.

[0047] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A drainage pipe leak detection system, comprising an inflation device and a controller; characterized in that: Also includes: frame; The frame is provided with a water tank and a marking machine for marking the drain pipe, and both ends of the water tank are provided with a feed inlet and a discharge port; the diameters of the feed inlet and the discharge port are matched with the diameter of the drain pipe; The frame is provided with a detection frame, which is located directly above the water tank; the detection frame is provided with a vibration sensor; The water tank discharge end is provided with a first touch switch, the first touch switch is fixedly mounted on the inner wall of the water tank, and the first touch switch is electrically connected to the controller; the first touch switch can be touched by the corrugation of the drain pipe; sealing plugs are provided at both ends of the drain pipe, a through hole is provided at the sealing plug, and a valve is provided at the through hole; The inflating device is located at the feed end of the water tank, and the inflating device is connected to the through hole of the sealing plug; the controller processes the vibration sensor signal through the Hanning window, and the controller is fixedly installed on the frame; the controller is used to receive the vibration sensor value, The vibration sensor number of the signal change is obtained according to the value of the vibration sensor, and the marking machine is controlled to mark the corrugation position of the drainage pipe according to the corrugation position of the drainage pipe corresponding to the vibration sensor number of the signal change.

2. The drainage pipe leakage detection system according to claim 1, characterized in that: A pipe cutter and a conveyor belt are provided at the discharge end of the water tank; the conveyor belt is located between the water tank and the pipe cutter; the pipe cutter is fixedly mounted on a frame; a second touch switch is provided on the pipe cutter, and the second touch switch is electrically connected to a controller; the second touch switch can be touched by the corrugation of the drainage pipe; the pipe cutter switch is electrically connected to a controller.

3. The drainage pipe leakage detection system according to claim 1, characterized in that: The inflation device includes an air source and an air intake pipe, the air source is connected to the air intake pipe, and a control valve is provided at the connection point between the air source and the air intake pipe; a filter is provided on the air source, and the filter is an oil mist separator or an air dryer.

4. The drainage pipe leakage detection system according to claim 3, characterized in that: The air inlet pipe is far away from the air outlet of the air conditioner.

5. The drainage pipe leakage detection system according to claim 1, characterized in that: It also includes a current transmitter for changing the working current of the vibration sensor, the current transmitter is electrically connected to the vibration sensor, and the current transmitter is electrically connected to the controller; an electromagnet and a magnet are arranged between the current transmitter and the vibration sensor; the electromagnet and the magnet are both provided with a conductive sheet for connecting the current transmitter and the vibration sensor; the conductive sheet contacts when the electromagnet and the magnet attract each other; the electromagnet control switch is electrically connected to the controller.

6. The drainage pipe leakage detection system according to claim 1, characterized in that: The frame is provided with an alarm, and the alarm is electrically connected to the controller.

7. The drainage pipe leak detection method specifically includes the following steps: Step 1: Use sealing plugs to seal both ends of the drain pipe, put the drain pipe into the water tank from the feed inlet of the water tank, make one end of the drain pipe located at the discharge port of the water tank, and inject water into the water tank; Step 2: Use the inflation device to fill the drain pipe with gas through the sealing plug. The controller processes the vibration sensor signal through the Hanning window to obtain the vibration sensor number and timer time of the signal change; if the vibration sensor number with signal change is not obtained and the timer time does not exceed the set detection time, the controller controls the timer to reset and perform subsequent drain pipe detection; if the vibration sensor number with signal change is obtained, the controller controls the trigger delay time and turns on the alarm; Step 3: The controller counts the drainage pipe ripple number according to the first touch switch signal to obtain the drainage pipe ripple number, compares it with the drainage pipe ripple number corresponding to the vibration sensor number of the vibration signal change, and marks the ripples of the drainage pipe; Step 4: The controller obtains the timer time. If the timer time exceeds the delay trigger time and the drain pipe ripple number in the controller is less than the set drain pipe ripple number, the controller controls the manual detection mark of the drain pipe.

8. The method for detecting leakage of a drainage pipe according to claim 7, characterized in that: In the step 1, the controller obtains the real-time current of the variable current transmitter, and the controller determines whether the real-time current is within the working current range of the vibration sensor. The controller controls the abnormal delay time to delay and then issues an abnormal working current alarm.

9. The drainage pipe leakage detection method according to claim 7, characterized in that: In the step 2, the controller controls the alarm to sound an alarm within a set time.

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