A leakage detection device and construction repair method for flooding a canal

Abstract

The present invention discloses a leakage detection device and construction repair method for flooding a canal, belonging to the field of leakage repair construction technology. The device comprises a leakage detection and plugging vehicle, which is connected to a barrel and a feeding pipe, and the barrel and the feeding pipe are connected; a grouting head, which is fixedly connected to a connecting tube at the top of the grouting head, which is connected to a first airbag, and the grouting head is fixedly connected to a second airbag; a feeding pipe, which is fixedly connected to the connecting tube and is connected to the grouting head; a camera, which is fixedly connected to the grouting head; and an exhaust pipe, which is fixedly connected to the grouting head. The present invention detects the humidity in the borehole by layers, and by comparing and analyzing the humidity signal, it can analyze and determine the specific humidity situation in the borehole, thereby facilitating the staff to inject repair agents of different concentrations. By injecting repair agents of different concentrations into boreholes at different leakage points, it can ensure the plugging effect of the repair agent on the leakage in the borehole, effectively controlling the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage repair construction, in particular to a leakage detection device and a construction repair method during canal flooding. Background Art

[0002] Canals are connecting channels used to connect rivers and farmland, and are mainly used to transport agricultural irrigation water. However, canals may leak due to long-term water erosion and geological changes. Canals under bridges may accelerate aging due to the cool and humid environment under the bridges, and may be more prone to canal leakage. In order to ensure the stable use of canals, it is generally necessary to regularly inspect the canals under bridges, and when leakage occurs, timely plugging and treatment are carried out.

[0003] When inspecting water channels under bridges, the existing technology generally uses distributed radar for scanning. After scanning, the leak point is located, and then a grouting machine is used to grout the hole to seal it. However, in actual operation, the existing grouting technology still has certain shortcomings. Due to the lack of direct access to the space under the bridge, workers may not be able to detect the actual leakage in the borehole, and therefore may not be able to detect the location and leakage of the leak point in the borehole. Although there is a method in the existing technology that uses a camera to extend into the borehole for photography, detection and analysis, in actual operation, there may be a problem that water from the upper leak point flows downward, affecting the normal photography and sampling of the leak point below. At the same time, when the grouting machine in the existing technology injects the repair agent, the grouting head is prone to self-shaking due to the vibration generated by the injection of the repair agent, affecting the stability of the grouting head during grouting. At the same time, during the grouting process, as the repair agent in the borehole expands, the pressure in the borehole may increase, and the grouting head may float up, and the grouting head may become detached from the borehole, causing leakage. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the background technology, and to propose a leakage detection device and a construction and repair method for a canal during flooding.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A leakage detection device for flooding a canal, comprising a leak detection vehicle and a grouting head, wherein the top of the grouting head is fixedly connected to a connecting tube, the connecting tube is connected to a first air bag, and the grouting head is fixedly connected to a second air bag;

[0007] A material delivery pipe is fixedly connected to the connecting tube and is in communication with the grouting head;

[0008] A camera is fixedly connected to the grouting head;

[0009] The air extraction pipe is fixedly connected to the grouting head;

[0010] The leak detection and plugging vehicle drives the grouting head to be inserted into the borehole. After the grouting head moves downward, the first airbag and the second airbag are inflated and bulge against the inner wall of the borehole. A closed chamber is formed between the first airbag and the second airbag. The exhaust pipe extracts the gas in the closed chamber. Under a negative pressure environment, water seeps into the borehole from the cracks. The camera captures and records the location of the leakage point in the closed chamber and the leakage condition of the leakage point, and transmits the captured signal to the computer platform for analysis and recording.

[0011] Preferably, an electric push rod is fixedly connected to the leak detection and plugging vehicle, a driving end of the electric push rod is fixedly connected to a driving rod, a top end of the driving rod is fixedly connected to a support plate, the support plate is fixedly connected to the feed pipe, and a connecting pipe is fixedly connected to the leak detection and plugging vehicle, one end of the connecting pipe is connected to the feed pipe.

[0012] Furthermore, a sliding groove is provided on the side wall of the connecting tube, a slider is slidably connected in the sliding groove, and the slider is fixedly connected to the first airbag;

[0013] When the inspection is completed, the feed pipe pulls the first and second airbags upward, and the second airbag slides upward synchronously on the connecting tube. The first and second airbags are inflated again, the inflated first airbag fits and seals the drill hole, and the second airbag inflates to support the bottom wall of the bridge.

[0014] Furthermore, a first electromagnet is fixedly connected to the bottom of the chute, the slider is a magnetic block, the first electromagnet is attracted to the slider, and a second electromagnet is fixedly connected to the top of the chute, and the second electromagnet is attracted to the slider.

[0015] Furthermore, an elastic pull rope is fixedly connected in the slide groove, one end of the elastic pull rope is fixedly connected to the slider, and the other end of the elastic pull rope is fixedly connected to the top wall in the slide groove.

[0016] Furthermore, an air pump is fixedly connected to the side wall of the leak detection and plugging vehicle, and a first air pipe and a second air pipe are fixedly connected to the air outlet end of the air pump. The end of the first air pipe away from the air pump is connected to the second airbag, and the end of the second air pipe away from the air pump is connected to the first airbag.

[0017] Preferably, a negative pressure pump is fixedly connected to the side wall of the leak detection and plugging vehicle, and the air suction end of the negative pressure pump is connected to the air suction pipe.

[0018] Furthermore, the connecting pipe is an elastic bellows.

[0019] A method for repairing leakage during canal flooding is disclosed, which uses a device for detecting leakage during canal flooding to inject a high polymer repair liquid into a borehole.

[0020] Furthermore, the high polymer repair liquid is prepared by mixing a resin raw material of component A and a curing agent of component B;

[0021] The raw materials of the resin of component A are as follows:

[0022] Low viscosity flexible asphalt W200: 400-600kg,

[0023] Environmentally friendly aromatic oil for rubber: 80-120kg,

[0024] Rosin polyester polyol JC-380: 70-90kg,

[0025] wanenatePM200: 250-290kg,

[0026] February dibutyltin silicate: 0.5-1.5kg,

[0027] Additives: 48-50kg;

[0028] Component B curing agent: TMR-2;

[0029] The preparation process of the high polymer repair liquid is as follows:

[0030] S1. Add 500k low-viscosity flexible asphalt W200 and 100kg environmentally friendly rubber aromatic oil into a clean vacuum reactor, heat to 120℃, and evacuate for 2 hours to remove moisture. When the moisture content reaches less than 1 / 1000, stop evacuating.

[0031] S2, cool to 80 ° C, add 80 kg rosin polyester polyol JC-380 and 270 kg polyphenylmethane polyisocyanate wanenate PM200, and stir thoroughly;

[0032] S3. Use a peristaltic pump to gradually add 1 kg of catalyst dibutyltin disilicate and 49 kg of auxiliary additives, keep the temperature at 80°C, and then fully react for 2 hours under stirring to form the final product. The product is then packaged and stored under nitrogen.

[0033] Then, before grouting repair, heat the prepared component A resin to 120°C, premix it with the component B curing agent in proportion, and inject it into the repair liquid storage tank for standby use.

[0034] Compared with the prior art, the present invention provides a leakage detection device and construction repair method for canal flooding, which has the following beneficial effects:

[0035] The present invention uses a camera, a first airbag and a second airbag in combination to photograph and sample the leakage point location and leakage situation in the borehole in layers, thereby reducing the problem of water in the upper leakage point flowing downwards and affecting the detection of the leakage point below. By comparing and analyzing the shooting signals uploaded three times, the specific leakage point location and leakage situation in the borehole can be analyzed and determined, thereby facilitating the staff to inject repair agents of different concentrations. By injecting repair agents of different concentrations into the boreholes at different leakage points, the sealing effect of the repair agent on the leakage in the borehole can be guaranteed, while effectively controlling the sealing cost.

[0036] The present invention utilizes the first airbag to block the borehole during the blocking process, thereby facilitating the subsequent grouting of the borehole by the grouting head, and at the same time utilizes the second airbag to move up and inflate to support the bottom wall of the bridge, thereby filling the gap between the connecting tube and the bottom wall of the bridge, thereby improving the stability of the grouting head during grouting, and utilizing the filling and reverse push of the first airbag to further solve the problem that during the grouting process, the repair agent in the borehole expands, which easily causes excessive pressure in the borehole, causing the grouting head and the second airbag to float up and leak grout, thereby further improving the stability of the grouting head during grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of a leakage detection device for flooding a canal proposed by the present invention. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the structure of a leakage detection device for flooding a canal proposed by the present invention. Figure 2 ;

[0039] Figure 3 A leakage detection device for flooding a canal proposed by the present invention Figure 2 A magnified view of part A in FIG;

[0040] Figure 4 A leakage detection device for flooding a canal proposed by the present invention Figure 2 A magnified view of part B in FIG;

[0041] Figure 5 This is a cross-sectional view of a device for detecting leakage during flooding of a canal proposed by the present invention;

[0042] Figure 6 A leakage detection device for flooding a canal proposed by the present invention Figure 5 Enlarged view of part C in the middle;

[0043] Figure 7 A leakage detection device for flooding a canal proposed by the present invention Figure 6 Enlarged view of part D in the middle;

[0044] Figure 8This is a cross-sectional view of a grouting head in a grouting brush assembly for cement product processing proposed by the present invention;

[0045] Figure 9 A leakage detection device for flooding a canal proposed by the present invention Figure 8 Enlarged view of part E in the middle;

[0046] Figure 10 This is a schematic structural diagram of the first and second airbags in a device for detecting leakage during flooding of a canal proposed by the present invention.

[0047] In the figure: 1. Leak detection and plugging vehicle; 101. Feeding pipe; 102. Material barrel; 2. Grouting head; 201. Camera; 202. Exhaust pipe; 3. Connecting tube; 301. Slide; 302. First electromagnet; 303. Second electromagnet; 4. First airbag; 401. Slider; 4011. Elastic pull rope; 5. Second airbag; 6. Feeding pipe; 601. Support plate; 6011. Drive rod; 602. Connecting pipe; 7. Pressure relief pipe; 8. Air pump; 801. First air pipe; 802. Second air pipe; 9. Negative pressure pump; 10. Electric push rod. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0050] Embodiment: A device for detecting leakage during flooding of a canal includes a leak detection vehicle 1, to which a barrel 102 and a feed pipe 101 are connected, and the barrel 102 and the feed pipe 101 are communicated; a grouting head 2, to which a connecting barrel 3 is fixedly connected at the top, a first air bag 4 is connected to the connecting barrel 3, and a second air bag 5 is fixedly connected to the grouting head 2; a feed pipe 6 is fixedly connected to the connecting barrel 3, and the feed pipe 6 is communicated with the grouting head 2;

[0051] The camera 201 is fixedly connected to the grouting head 2;

[0052] The air extraction pipe 202 is fixedly connected to the grouting head 2;

[0053] The leak detection and plugging vehicle 1 drives the grouting head 2 to be inserted into the borehole. After the grouting head 2 moves downward, the first airbag 4 and the second airbag 5 are inflated and bulged to fit against the inner wall of the borehole. A closed chamber is formed between the first airbag 4 and the second airbag 5. The exhaust pipe 202 extracts the gas in the closed chamber. Under a negative pressure environment, water seeps into the borehole from the cracks. The camera 201 photographs and records the position of the leakage point in the closed chamber and the leakage condition of the leakage point, and transmits the photographing signal to the computer platform for analysis and recording.

[0054] It should be noted that the camera 201 is a commercially available camera with an illumination light.

[0055] Before use, staff used distributed radar equipment to detect leakage points in the bridge bottom channel and marked the detected leakage points. After marking, they used a small drilling machine to open repair holes on the side of the leakage point.

[0056] During the repair work, the staff controls the leak detection and plugging vehicle 1 to move into the bottom of the bridge. After moving to the drilling position, the grouting head 2 is located directly above the drill hole. The electric push rod 10 is activated, and the electric push rod 10 will pull the supporting plate 601 downward. The downward movement of the supporting plate 601 will simultaneously pull the material delivery pipe 6 downward. The downward movement of the material delivery pipe 6 will push the connecting tube 3 and the grouting head 2 into the drill hole.

[0057] Reference Figure 2-Figure 6When the grouting head 2 is lowered to the bottom of the borehole, the air pump 8 is started, and the air pump 8 will inflate the first air bag 4 and the second air bag 5. After the first air bag 4 and the second air bag 5 are inflated, they will stick to the side wall of the borehole. At this time, a closed chamber is formed between the first air bag 4 and the second air bag 5. At this time, the negative pressure pump 9 is started, and the negative pressure pump 9 will extract the gas in the closed chamber through the exhaust pipe 202. Under the negative pressure environment, water at the cracks in the leakage point will flow into the borehole. At this time, the camera 201 will take pictures and samples the leakage of the bottom layer of the borehole, and transmit the shooting signal to the computer platform through the controller. After the leakage of the bottom layer is detected, the first air bag 4 and the second air bag 5 are depressurized and deflated. At this time, the electric push rod 10 pushes the support plate 601 to move upward, thereby pulling the grouting head 2 and the connecting tube 3 upward. After moving up a certain distance, the first air bag 4 and the second air bag 5 move to the middle layer of the borehole, and at this time, the first air bag 4 and the second air bag 5 are inflated again. The second airbag 5 is inflated, and the first airbag 4 and the second airbag 5 will form a closed chamber with the side wall of the middle layer of the borehole. At this time, the gas in the closed chamber is extracted again by the negative pressure pump 9. At this time, the camera 201 will detect the leakage point and leakage situation of the middle layer of the borehole, and then transmit the shooting signal to the computer platform. The same steps are used to detect the leakage humidity situation of the upper layer of the borehole. By comparing the detection signals uploaded three times, the leakage point position and leakage situation in the borehole can be analyzed and determined, which makes it easier for the staff to prepare repair agents of different concentrations. By injecting repair agents of different concentrations into boreholes with different leakage severity, the sealing effect of the repair agent on the leakage in the borehole can be guaranteed, which solves the problem that the actual leakage situation in the borehole cannot be judged in the existing technology. Only the repair agent of the same concentration is injected, which is easy to have poor sealing effect at the location where the leakage is serious, and effectively improves the sealing effect of the leakage at the canal.

[0058] An air pump 8 is fixedly connected to the side wall of the leak detection and plugging vehicle 1, and a first air pipe 801 and a second air pipe 802 are fixedly connected to the air outlet end of the air pump 8. The end of the first air pipe 801 away from the air pump 8 is connected to the second airbag 5, and the end of the second air pipe 802 away from the air pump 8 is connected to the first airbag 4.

[0059] A negative pressure pump 9 is fixedly connected to the side wall of the leak detection and plugging vehicle 1 , and an air extraction end of the negative pressure pump 9 is connected to the air extraction pipe 202 .

[0060] An electric push rod 10 is fixedly connected to the leak detection and plugging vehicle 1, and a driving rod 6011 is fixedly connected to the driving end of the electric push rod 10. The top of the driving rod 6011 is fixedly connected to a support plate 601, and the support plate 601 is fixedly connected to the feed pipe 6. A connecting pipe 602 is fixedly connected to the leak detection and plugging vehicle 1, and one end of the connecting pipe 602 is connected to the feed pipe 6, and the other end of the connecting pipe 602 is connected to the barrel 102.

[0061] A sliding groove 301 is provided on the side wall of the connecting tube 3 , a slider 401 is slidably connected in the sliding groove 301 , and the slider 401 is fixedly connected to the first airbag 4 .

[0062] Reference Figure 6 In a specific implementation, a pressure relief pipe 7 with a solenoid valve is provided on both the first airbag 4 and the second airbag 5 .

[0063] A first electromagnet 302 is fixedly connected to the bottom of the chute 301 , and the slider 401 is a magnetic block. The first electromagnet 302 and the slider 401 are attracted to each other. A second electromagnet 303 is fixedly connected to the top of the chute 301 , and the second electromagnet 303 and the slider 401 are attracted to each other.

[0064] Reference Figure 7 、 Figure 10 In the specific implementation, in order to ensure that the second electromagnet 303 at the top can adsorb the slider 401, an elastic pull rope 4011 is fixedly connected to the slide groove 301, one end of the elastic pull rope 4011 is fixedly connected to the slider 401, and the other end of the elastic pull rope 4011 is fixedly connected to the top wall inside the slide groove 301.

[0065] It should be noted that the first electromagnet 302 and the second electromagnet 303 are both strong magnetic electromagnets available on the market.

[0066] Reference Figures 6-10 When the detection is completed, the first airbag 4 and the second airbag 5 move up. At this time, the first electromagnet 302 is powered off and the first electromagnet 302 will no longer attract the slider 401. At this time, the tightened elastic pull rope 401 will reset and shrink. At this time, the slider 401 is pulled up and the first airbag 4 is pulled up. After the slider 401 slides up a distance, the second electromagnet 303 is powered on. At this time, the second electromagnet 303 will attract the slider 401. At this time, the slider 401 will be attracted and slide, and finally attracted to the second electromagnet 303. At this time, the first airbag 4 will slide to the top.

[0067] It should be noted that the overall height of the leak detection and plugging vehicle 1 is slightly lower than the bottom wall of the bridge. When the first airbag 4 slides up to the top, the distance between the top of the first airbag 4 and the bottom wall of the bridge is 8-10 cm.

[0068] When the first airbag 4 slides to the top, the first airbag 4 is inflated again. When the first airbag 4 is fully inflated, the first airbag 4 will be against the bottom wall of the bridge. At this time, the first airbag 4 will fill the gap between the connecting tube 3 and the bottom wall of the bridge. At this time, the overall stability of the connecting tube 3 and the grouting head 2 can be improved, and the possibility of vibration displacement of the connecting tube 3 and the grouting head 2 due to the injection of the repair agent during the grouting process is reduced. At the same time, the filling and counter-top of the first airbag 4 further solves the problem that during the grouting process, the repair agent in the borehole expands, which easily causes excessive pressure in the borehole, causing the grouting head 2 and the second airbag 5 to float and leak slurry, thereby further improving the stability of the grouting head 2 during grouting.

[0069] In specific implementation, the first airbag 4 and the second airbag 5 are both made of highly wear-resistant thickened airbags.

[0070] Reference Figure 2 、 Figure 4 , the connecting pipe 602 is an elastic bellows.

[0071] By configuring the connecting pipe 602 as an elastic bellows, when the feeding pipe 6 drives the grouting head 2 to move up and down, the connecting pipe 602 will not be rigidly broken.

[0072] A method for repairing leakage during canal flooding, using a device for detecting leakage during canal flooding, comprises the following steps:

[0073] Step 1: Use a distributed radar device to detect leakage points on the water channel at the bottom of the bridge and mark the leakage points;

[0074] Step 2: Use a small drilling machine to drill holes at the marked leakage points;

[0075] Step 3: Connect the feeding pipe 101 to the external feeding pump and move the leak detection and plugging vehicle 1 to the drilling position;

[0076] Step 4: The electric push rod 10 pulls the grouting head 2 deep into the drill hole, and injects air into the first airbag 4 and the second airbag 5, so that the two airbags swell and adhere to the side wall of the drill hole to form a closed chamber;

[0077] Step 5: The gas extraction pipe 202 extracts the gas in the sealed chamber, and the camera 201 detects the leakage point and leakage situation in the sealed chamber;

[0078] Step 6: Depressurize and exhaust the first and second airbags 4 and 5, move the grouting head 2 upward, and slide the second airbag 5 upward synchronously. Inflate the first and second airbags 4 and 5 again, so that the first airbag 4 fits the drilled hole tightly and seals it, and the second airbag 5 inflates to support the bottom wall of the bridge.

[0079] Step 7: The feeding pump pumps the proportioned high polymer repair liquid into the barrel 102 through the feeding pipe 101, and then injects it into the drill hole through the grouting head 2;

[0080] Step 8: After the grouting is completed, remove the leak detection vehicle 1.

[0081] It should be noted that the high polymer repair fluid is prepared by mixing the resin raw material of component A and the curing agent of component B;

[0082] The raw materials of the resin of component A are as follows:

[0083] Low viscosity flexible asphalt W200: 400-600kg,

[0084] Environmentally friendly aromatic oil for rubber: 80-120kg,

[0085] Rosin polyester polyol JC-380: 70-90kg,

[0086] wanenatePM200: 250-290kg,

[0087] February dibutyltin silicate: 0.5-1.5kg,

[0088] Additives: 48-50kg;

[0089] Component B curing agent: TMR-2;

[0090] The preparation process of high polymer repair fluid is as follows:

[0091] S1. Add 500k low-viscosity flexible asphalt W200 and 100kg environmentally friendly rubber aromatic oil into a clean vacuum reactor, heat to 120℃, and evacuate for 2 hours to remove moisture. When the moisture content reaches less than 1 / 1000, stop evacuating.

[0092] S2, cool to 80 ° C, add 80 kg rosin polyester polyol JC-380 and 270 kg polyphenylmethane polyisocyanate wanenate PM200, and stir thoroughly;

[0093] S3. Use a peristaltic pump to gradually add 1 kg of catalyst dibutyltin disilicate and 49 kg of auxiliary additives, keep the temperature at 80°C, and then fully react for 2 hours under stirring to form the final product. The product is then packaged and stored under nitrogen.

[0094] Then, before grouting repair, heat the prepared component A resin to 120°C, premix it with component B curing agent in a mass ratio of 100:0.05-0.1, and inject it into the repair liquid storage tank for standby use.

[0095] In actual implementation, the mass ratio of component A resin and component B curing agent is 100:0.05-1; and when specifically configuring the repair fluid, a variety of concentrations of repair fluid can be configured according to the grouting requirements, so that repair fluids of different ratios and concentrations can be injected into boreholes with different leakage conditions in the future. On the one hand, it reduces the cost of plugging leaks, and on the other hand, it can perform high-concentration plugging on points with severe leakage, thereby improving the plugging effect on locations with severe leakage.

[0096] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A leakage detection device for flooding a canal, characterized in that: It comprises a grouting head (2) and a leak detection vehicle (1), wherein the top of the grouting head (2) is fixedly connected to a connecting tube (3), the connecting tube (3) is connected to a first air bag (4), and the grouting head (2) is fixedly connected to a second air bag (5); A material delivery pipe (6) is fixedly connected to the connecting tube (3), and the material delivery pipe (6) is connected to the grouting head (2); A camera (201) is fixedly connected to the grouting head (2); An air extraction pipe (202) is fixedly connected to the grouting head (2); The leak detection and plugging vehicle (1) drives the grouting head (2) to be inserted into the borehole. After the grouting head (2) moves downward, the first airbag (4) and the second airbag (5) are inflated and bulge to contact the inner wall of the borehole. A closed chamber is formed between the first airbag (4) and the second airbag (5). The exhaust pipe (202) extracts the gas in the closed chamber. Under a negative pressure environment, water seeps into the borehole from the crack. The camera (201) captures and records the position of the leakage point in the closed chamber and the leakage condition of the leakage point, and transmits the captured signal to a computer platform for analysis and recording.

2. A leakage detection device for flooding a canal according to claim 1, characterized in that: The leak detection and plugging vehicle (1) is fixedly connected to an electric push rod (10), a driving end of the electric push rod (10) is fixedly connected to a driving rod (6011), a top end of the driving rod (6011) is fixedly connected to a supporting plate (601), the supporting plate (601) is fixedly connected to the material delivery pipe (6), and a connecting pipe (602) is fixedly connected to the leak detection and plugging vehicle (1), one end of the connecting pipe (602) is connected to the material delivery pipe (6).

3. A leakage detection device for flooding a canal according to claim 2, characterized in that: A sliding groove (301) is provided on the side wall of the connecting tube (3), a slider (401) is slidably connected in the sliding groove (301), and the slider (401) is fixedly connected to the first airbag (4); When the inspection is completed, the feeding pipe (6) pulls the first airbag (4) and the second airbag (5) upward, and the second airbag (5) slides upward synchronously on the connecting tube (3), and the first airbag (4) and the second airbag (5) are inflated again, the inflated first airbag (4) fits the sealed drill hole, and the inflated second airbag (5) presses against the bottom wall of the bridge.

4. A leakage detection device for flooding a canal according to claim 3, characterized in that: The bottom of the chute (301) is fixedly connected to a first electromagnet (302), the slider (401) is a magnetic block, the first electromagnet (302) and the slider (401) are attracted to each other, and the top of the chute (301) is fixedly connected to a second electromagnet (303), and the second electromagnet (303) and the slider (401) are attracted to each other.

5. A leakage detection device for flooding a canal according to claim 4, characterized in that: An elastic pull rope (4011) is fixedly connected in the slide groove (301), one end of the elastic pull rope (4011) is fixedly connected to the slider (401), and the other end of the elastic pull rope (4011) is fixedly connected to the top wall of the slide groove (301).

6. A leakage detection device for flooding a canal according to claim 1, characterized in that: An air pump (8) is fixedly connected to the side wall of the leak detection and plugging vehicle (1), and a first air supply pipe (801) and a second air supply pipe (802) are fixedly connected to the air outlet end of the air pump (8). The end of the first air supply pipe (801) away from the air pump (8) is connected to the second air bag (5), and the end of the second air supply pipe (802) away from the air pump (8) is connected to the first air bag (4).

7. A leakage detection device for flooding a canal according to claim 1, characterized in that: A negative pressure pump (9) is fixedly connected to the side wall of the leak detection and plugging vehicle (1), and the air extraction end of the negative pressure pump (9) is connected to the air extraction pipe (202).

8. The device for detecting leakage during flooding of a canal according to claim 2, characterized in that: The connecting pipe (602) is an elastic bellows.

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