A leakage detection device for detecting leakage of water from a slope

Abstract

The application discloses a kind of for slope water seepage leak detection equipment, belong to slope leak detection equipment technical field, the present application includes cylindrical negative pressure cylinder, the upper end of the negative pressure cylinder is fixedly installed with air pump, and air pump pipeline and the top of negative pressure cylinder are communicated, and the lower end surface of negative pressure cylinder is fixedly connected with the sealing rubber ring of improving sealing property;The outside of the negative pressure cylinder is slidably sleeved with sleeve, and the lower end of the sleeve is provided with polishing assembly, and the inside of the negative pressure cylinder is fixedly installed with fixed pipe at equal angle, the outside of the fixed pipe is sequentially slidably connected with first piston piece and second piston piece from top to bottom, and the inside wall of the negative pressure cylinder is connected with first piston piece and second piston piece by interference sliding connection.The leak detection equipment for slope water seepage can be preprocessed to the detection position slope face, effectively ensure the detection sealing property, and the dust generated by preprocessing can be used to automatically mark the leakage, which is convenient for subsequent leak stop maintenance.

Description

Technical Field

[0001] This invention relates to the field of slope leakage detection technology, specifically to a leakage detection device for slope seepage. Background Technology

[0002] As a common geological structure, slopes are widely used in various engineering projects such as roads, water conservancy, and buildings. Under the influence of the natural environment, the completed slope structure is prone to water seepage problems. In order to facilitate preventive repair of seepage points, it is necessary to use leak detection equipment to detect potential leaks in the slope so that timely leak sealing and repair can be carried out.

[0003] The prior art (Chinese patent application with publication number CN118914030A and publication date of 2024-11-08) discloses a seepage prevention detection device and method for hydraulic slopes, including a vehicle body, a detection cylinder connected to the vehicle body, a slip ring slidably connected to the outer wall of the detection cylinder, and an air bladder connected to the bottom surface of the slip ring; the air bladder is connected to an air outlet pipe, and the vehicle body is also connected to an air pump that can inflate the air outlet pipe and a water pump that can inject water into the detection cylinder; a piston is slidably connected to the air outlet pipe, the piston is connected to the air outlet pipe through a third spring, and a second switch that can control the water pump to start working and the air pump to stop working is connected to the slip ring, the second switch being located on one side of the piston. This device is easy to operate and highly automated, requiring minimal intervention from staff to test the seepage prevention capacity of water conservancy slopes. It boasts high testing efficiency and excellent testing quality. Existing technology (Chinese patent announcement number: CN215263013U, announcement date: 2021-12-21) discloses a negative pressure sponge device for testing the waterproof quality of underground concrete structures. It includes a cavity and an adsorption sponge disposed on the end face of the cavity. The adsorption sponge is connected to the inside of the cavity. The cavity is connected to a negative pressure forming system via a connecting hose. The adsorption sponge includes an adsorption layer and multiple interconnected air cavities disposed within the adsorption layer. The outer surface of the adsorption layer is in contact with the backwater surface. The inside of the cavity is in a vacuum state through the negative pressure forming system, and the adsorption sponge is adsorbed and connected to the backwater surface. Using a sponge negative pressure device for negative pressure detection increases the contact area with the backwater surface of the location being tested. After the negative pressure forming system is activated, the sponge negative pressure device is compressed and deformed along the surface of the backwater surface under the action of negative pressure to adapt to the uneven and rough surface of the backwater surface. This allows the sponge negative pressure device to be stably and firmly fixed on the backwater surface of the location being tested, thereby ensuring the smooth progress of the negative pressure method for detecting water leakage.

[0004] While existing slope seepage detection equipment can detect leaks through pressure changes, it is inconvenient to pre-treat the detection points on the slope before use, resulting in limited sealing between the equipment and the slope, which in turn affects subsequent pressure change detection. Furthermore, the inability to automatically mark leak points during the detection process increases the difficulty of subsequent maintenance, indicating certain shortcomings in its use. Summary of the Invention

[0005] The purpose of this invention is to provide a leak detection device for slope seepage, in order to solve the problems mentioned in the background art. Although the existing leak detection devices for slope seepage on the market can detect leaks through pressure changes, it is inconvenient to pre-treat the detection points on the slope before use, resulting in limited sealing effect between the device and the slope, and the inability to automatically mark the leak points during the detection process.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A leak detection device for slope seepage includes a cylindrical negative pressure cylinder, an air pump is fixedly installed at the upper end of the negative pressure cylinder, the air pump’s air inlet pipe is connected to the top of the negative pressure cylinder, and a sealing ring to improve sealing performance is fixedly connected to the lower end face of the negative pressure cylinder.

[0008] The outer side of the negative pressure cylinder is fitted with a sleeve that slides and rises, and a grinding component is provided at the lower end of the sleeve. A fixing tube is fixedly installed at an equal angle on the lower inner side of the negative pressure cylinder. A first piston and a second piston are slidably connected through the outer side of the fixing tube from top to bottom. The first piston and the second piston are both interference-fitted to the inner wall of the negative pressure cylinder. The first piston and the second piston are elastically connected through an elastic component. A rotating block is elastically rotatably installed through the middle position of the second piston. A gas conveying component for conveying gas and marking dust is installed between the rotating block and the first piston.

[0009] Preferably, the negative pressure cylinder and the sleeve are coaxially arranged, and a rotating seat is rotatably installed on the outer side of the middle part of the negative pressure cylinder. A first spring is fixedly connected between the lower end face of the rotating seat and the lower inner side of the sleeve, and the negative pressure cylinder and the sleeve are elastically telescopically connected.

[0010] Preferably, the lower end face of the sleeve is elastically rotatably connected to a rotating rod at an equal angle, and a grinding disc is fixedly connected to the lower end of the rotating rod. The positions of the grinding disc and the sealing ring are corresponding vertically. At the same time, the lower part of the rotating rod is provided with an inclined structure. During the extension and retraction adjustment of the negative pressure cylinder and the sleeve, the sealing ring contacts the inclined surface of the lower part of the rotating rod and pushes the rotating rod to rotate elastically. The sealing ring is sealed and adhered to the grinding position on the slope.

[0011] Preferably, the lower outer wall of the negative pressure cylinder is provided with a spiral guide groove, and the lower inner wall of the sleeve is embedded with a ball bearing. During the extension and retraction adjustment of the negative pressure cylinder and the sleeve, the ball bearing rolls along the guide groove to drive the sleeve to rotate the rotating rod, thereby realizing the grinding of the slope detection position.

[0012] Preferably, during the process of the air pump drawing air from inside the negative pressure cylinder, the first piston slides upward along the inner wall of the negative pressure cylinder under the action of negative pressure, and the fixing tube passes through the first piston and the second piston to realize the limiting and guiding of the first piston and the second piston.

[0013] Preferably, a pressure sensor is embedded and fixedly installed on the lower surface of the first piston, and a second spring is fixedly connected between the pressure sensor and the second piston. During the upward movement of the first piston, the pressure sensor (13) pulls the second piston to move upward synchronously through the second spring.

[0014] Preferably, during the upward movement of the second piston, a negative pressure is generated between the lower end of the negative pressure cylinder and the slope detection point, and the first piston and the second piston move away from each other under the action of negative pressure, stretching the second spring.

[0015] Preferably, the gas delivery assembly includes an elastic rubber component fixedly installed between the rotating block and the first piston component. The elastic rubber component is cylindrical when there is no external force, and it maintains its initial twisted state under the elastic rotation of the rotating block. Meanwhile, the elastic rubber component stretches as the first piston component and the second piston component move away from each other. When the elastic rubber component is stretched, it drives the rotating block to rotate elastically under the action of material elasticity.

[0016] Preferably, the gas supply assembly further includes a gas supply hose fixedly connected between the fixed pipe and the elastic rubber part, and the lower end of the fixed pipe and the lower end of the negative pressure cylinder are connected by uniformly opened air holes, and an exhaust pipe is uniformly installed through the rotating block. At the same time, the gas supply hose and the exhaust pipe are both equipped with a one-way valve structure. During the stretching and unfolding of the elastic rubber part, the dust generated by grinding is extracted through the fixed pipe and the gas supply hose, and during the twisting of the elastic rubber part, the dust sucked in is evenly spread on the detection point through the exhaust pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the leak detection device for slope seepage can pre-treat the slope surface at the detection location, effectively ensuring the sealing of the detection, and can automatically mark the seepage point with the dust generated during the treatment, which is convenient for subsequent leak sealing and maintenance. The specific details are as follows;

[0018] 1. The device is equipped with a negative pressure cylinder, a sleeve, and a rotating rod. During testing, the rotating rod is placed against the slope of the location to be tested, while the negative pressure cylinder is pressed down, causing the cylinder and sleeve to elastically expand and contract. At this time, the ball bearings on the inner side of the lower end of the sleeve roll along the spiral guide groove, driving the sleeve to rotate. The sleeve then drives the rotating rod to rotate synchronously, allowing the grinding disc at the lower end of the rotating rod to grind the slope testing area, thereby improving the smoothness of the testing surface. As the sealing ring moves downward, it squeezes the inclined surface at the lower end of the rotating rod, pushing the rotating rod to rotate elastically. This ensures that the sealing ring fits tightly against the grinding area, effectively improving the sealing between the negative pressure cylinder and the slope, and ensuring the accuracy of subsequent testing.

[0019] 2. It is equipped with a first piston, a second piston, and an elastic rubber component. When the air pump draws negative pressure into the upper part of the negative pressure cylinder, the first piston and the second piston will move upward along the inner wall of the negative pressure cylinder under the action of negative pressure. At the same time, the distance between the first piston and the second piston gradually increases, thereby stretching the elastic rubber component and causing it to gradually unfold. This allows the elastic rubber component to absorb the dust generated during the polishing process through the fixed pipe and the air supply hose, making it convenient to use the dust to mark the leakage point later.

[0020] 3. Equipped with a rotating block, elastic rubber parts, and an exhaust pipe, when a leak is detected, the leak will accelerate under negative pressure. Simultaneously, the second piston will move upward under the influence of air pressure changes, thus working with the first piston to squeeze the elastic rubber parts. This causes the elastic rubber parts to spray the sucked-in dust into the detection area through the exhaust pipe. At the same time, the rotating block will rotate elastically, so that the dust is evenly spread at the detection point. The water flowing out of the leak will flow down the slope, leaving scouring marks on the spread dust. The highest point of the mark is the leak point, thus achieving automatic marking of the leak point. Subsequently, by observing the water flow scouring marks, the leak point can be quickly located and the leak can be plugged. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0023] Figure 3 This is a schematic cross-sectional view of the sleeve structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0026] Figure 6This is a cross-sectional view of the negative pressure cylinder of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the elastic rubber component of the present invention;

[0028] Figure 8 This is a schematic diagram of the connection structure of the first piston member, the second piston member, and the elastic rubber member of the present invention;

[0029] Figure 9 This is a schematic diagram of the elastic rubber part stretching and unfolding installation structure of the present invention.

[0030] In the diagram: 1. Negative pressure cylinder; 2. Air pump; 3. Sleeve; 4. Rotating seat; 5. First spring; 6. Rotating rod; 7. Guide groove; 8. Ball bearing; 9. Sealing ring; 10. Fixed tube; 11. First piston; 12. Second piston; 13. Pressure sensor; 14. Second spring; 15. Rotating block; 16. Elastic rubber component; 17. Air supply hose; 18. Exhaust pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Existing slope seepage detection equipment is inconvenient to pre-treat the slope surface before use, resulting in poor sealing between the equipment and the slope surface, thus reducing detection accuracy. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-4 As shown; a leak detection device for slope seepage includes a cylindrical negative pressure cylinder 1, an air pump 2 is fixedly installed at the upper end of the negative pressure cylinder 1, and the air inlet pipe of the air pump 2 is connected to the top of the negative pressure cylinder 1, and a sealing ring 9 for improving sealing is fixedly connected to the lower end face of the negative pressure cylinder 1; a sleeve 3 is slidably sleeved on the outer side of the negative pressure cylinder 1, and a grinding component is provided at the lower end of the sleeve 3.

[0033] The negative pressure cylinder 1 and the sleeve 3 are coaxially arranged, and a rotating seat 4 is rotatably mounted on the outer side of the middle part of the negative pressure cylinder 1. A first spring 5 is fixedly connected between the lower end face of the rotating seat 4 and the lower inner side of the sleeve 3. The negative pressure cylinder 1 and the sleeve 3 are elastically telescopically connected. A rotating rod 6 is elastically rotatably connected to the lower end face of the sleeve 3 at equal angles. A grinding disc is fixedly connected to the lower end of the rotating rod 6. The positions of the grinding disc and the sealing ring 9 are vertically corresponding. The lower part of the rotating rod 6 is provided with an inclined structure. During the telescopic adjustment of the negative pressure cylinder 1 and the sleeve 3, the sealing ring 9 contacts the inclined surface of the lower part of the rotating rod 6 and pushes the rotating rod 6 to rotate elastically. The sealing ring 9 is sealed and fits the grinding position on the slope. The lower outer wall of the negative pressure cylinder 1 is provided with a spiral guide groove 7, and the lower inner wall of the sleeve 3 is embedded with a ball bearing 8. During the telescopic adjustment of the negative pressure cylinder 1 and the sleeve 3, the ball bearing 8 rolls along the guide groove 7 to drive the sleeve 3 to rotate the rotating rod 6, thereby realizing the grinding of the slope detection position.

[0034] like Figures 3-4 As shown, the lower end of the rotating rod 6 is placed against the slope to be tested, so that the test point is located among multiple rotating rods 6. At the same time, the negative pressure cylinder 1 is pressed down, causing the negative pressure cylinder 1 and the sleeve 3 to elastically extend and retract. At this time, the ball bearing 8 set on the inner side of the lower end of the sleeve 3 will roll along the spiral guide groove 7, thereby driving the sleeve 3 to rotate. The sleeve 3 will drive the rotating rod 6 to rotate synchronously, so that the grinding disc at the lower end of the rotating rod 6 can grind the slope test position, thereby improving the smoothness of the test surface. As the sealing ring 9 continues to move downward, it will squeeze the inclined surface at the lower end of the rotating rod 6, thereby pushing the rotating rod 6 to rotate elastically away from the sealing ring 9, so that the sealing ring 9 is tightly attached to the grinding position, effectively improving the sealing between the negative pressure cylinder 1 and the slope, ensuring the accuracy of subsequent testing. The air pump 2 is used to extract the air inside the negative pressure cylinder 1 to achieve efficient and accurate water seepage detection.

[0035] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Existing slope seepage detection equipment cannot automatically mark seepage points during the detection process, making it inconvenient to accurately locate and repair leaks later. To further solve this technical problem, this example discloses the following technical content, such as... Figures 5-9 As shown; a fixed tube 10 is fixedly installed at the lower inner side of the negative pressure cylinder 1 at equal angles. The first piston 11 and the second piston 12 are slidably connected through the outer side of the fixed tube 10 from top to bottom. The first piston 11 and the second piston 12 are both interference-fitted to the inner wall of the negative pressure cylinder 1, and the first piston 11 and the second piston 12 are elastically connected through an elastic component.

[0036] During the process of air pump 2 drawing air from inside negative pressure cylinder 1, the first piston 11 slides upward along the inner wall of negative pressure cylinder 1 under the action of negative pressure, and the fixed tube 10 passes through the first piston 11 and the second piston 12 to realize the limiting and guiding of the first piston 11 and the second piston 12. The pressure sensor 13 is embedded and fixedly installed on the lower surface of the first piston 11, and the pressure sensor 13 and the second piston 12 are fixedly connected by a second spring 14. During the upward movement of the first piston 11, the pressure sensor 13 pulls the second piston 12 to move upward synchronously through the second spring 14. During the upward movement of the second piston 12, a negative pressure is generated between the lower end of negative pressure cylinder 1 and the slope detection point, and the first piston 11 and the second piston 12 move away from each other under the action of negative pressure and stretch the second spring 14.

[0037] like Figures 5-7 As shown, when the air pump 2 draws negative pressure from the upper part of the negative pressure cylinder 1, the first piston 11 and the second piston 12 will move upward along the inner wall of the negative pressure cylinder 1 under the action of negative pressure. At the same time, the distance between the first piston 11 and the second piston 12 gradually increases, thereby stretching the second spring 14. At this time, the pressure sensor 13 can perform pressure detection. When there is a leak at the detection location, the air pressure between the second piston 12 and the slope gradually changes, causing the second piston 12 to gradually move upward. The distance between the first piston 11 and the second piston 12 gradually decreases again. At this time, the detection value of the pressure sensor 13 will change, thereby realizing the leakage detection alarm.

[0038] like Figures 7-9 A rotating block 15 is elastically rotatably mounted through the middle of the second piston member 12. A gas conveying assembly for conveying gas and marking dust is installed between the rotating block 15 and the first piston member 11. The gas conveying assembly includes an elastic rubber member 16 fixedly installed between the rotating block 15 and the first piston member 11. The elastic rubber member 16 is cylindrical without external force and maintains its initial twisted state under the elastic rotation of the rotating block 15. Simultaneously, as the first piston member 11 and the second piston member 12 move away from each other, the elastic rubber member 16 is stretched. Furthermore, when the elastic rubber member 16 is stretched, the material... Under the action of the material elasticity, the rotating block 15 is driven to rotate elastically. The air supply component also includes an air supply hose 17 fixedly connected between the fixed pipe 10 and the elastic rubber part 16. The lower end of the fixed pipe 10 and the air holes uniformly opened at the lower end of the negative pressure cylinder 1 are connected. An exhaust pipe 18 is uniformly installed through the rotating block 15. At the same time, a one-way valve structure is provided on the air supply hose 17 and the exhaust pipe 18. During the stretching and unfolding of the elastic rubber part 16, the dust generated by grinding is extracted through the fixed pipe 10 and the air supply hose 17. During the twisting of the elastic rubber part 16, the dust sucked in is evenly spread on the detection point through the exhaust pipe 18.

[0039] As the distance between the first piston 11 and the second piston 12 gradually increases, they stretch and unfold the elastic rubber part 16 between them. The twisted elastic rubber part 16 undergoes elastic stretching under the tension at both ends. Simultaneously, due to the limited elasticity of the material, the wrinkles on the elastic rubber part 16 unfold, causing it to return to a cylindrical state. Figure 9 As shown, at this time, the elastic rubber part 16 will draw in the dust generated during the grinding process through the fixed pipe 10 and the air supply hose 17. When there is a water leak at the detection location, the water leak will accelerate under the action of negative pressure. At the same time, the second piston part 12 will move upward under the action of air pressure change, thereby cooperating with the first piston part 11 to squeeze the elastic rubber part 16. Meanwhile, the rotating block 15 will perform synchronous elastic rotation and reset, realizing the re-twisting of the elastic rubber part 16, so that the elastic rubber part 16 will spray the dust drawn in through the exhaust pipe 18 towards the detection area. At the same time, the rotating block 15 drives the exhaust pipe 18 to rotate during elastic rotation, so that the dust is evenly spread on the detection point. The water flowing out of the leak point will flow down the slope, thus leaving a scouring mark on the spread dust. The highest point of the mark is the water leak point, thus realizing the automatic marking of the leak point. Subsequently, by observing the water scouring mark, the leak point can be quickly found and the leak can be plugged.

[0040] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak detection device for slope water seepage, comprising a cylindrical negative pressure cylinder (1), the upper end of the negative pressure cylinder (1) is fixedly installed with an air pump (2), the air inlet pipeline of the air pump (2) is communicated with the top of the negative pressure cylinder (1), and the lower end surface of the negative pressure cylinder (1) is sealingly and fixedly connected with a sealing rubber ring (9) for improving the sealing performance. characterized in that The outer side of the negative pressure cylinder (1) is sleeved with a sleeve (3), the lower end of the sleeve (3) is provided with a polishing assembly, the inner side of the lower end of the negative pressure cylinder (1) is fixedly installed with a fixed pipe (10) at equal angles, the outer side of the fixed pipe (10) is sequentially penetrated by a first piston piece (11) and a second piston piece (12) from top to bottom in sliding connection, the first piston piece (11) and the second piston piece (12) are both in interference sliding connection with the inner wall of the negative pressure cylinder (1), the first piston piece (11) and the second piston piece (12) are elastically connected through an elastic component, a rotating block (15) is penetratingly and elastically installed at the middle position of the second piston piece (12), and a gas conveying assembly for conveying gas and marking dust is installed between the rotating block (15) and the first piston piece (11). During the process of the air pump (2) extracting the air inside the negative pressure cylinder (1), the first piston piece (11) slides upward along the inner wall of the negative pressure cylinder (1) under the action of negative pressure, and the fixed pipe (10) penetrates the first piston piece (11) and the second piston piece (12), thereby achieving the limiting and guiding of the first piston piece (11) and the second piston piece (12). The lower surface of the first piston piece (11) is embeddedly and fixedly installed with a pressure sensor (13), a second spring (14) is fixedly connected between the pressure sensor (13) and the second piston piece (12), and the pressure sensor (13) pulls the second piston piece (12) to move upward synchronously through the second spring (14) during the upward movement of the first piston piece (11). During the upward movement of the second piston piece (12), negative pressure is generated between the lower end of the negative pressure cylinder (1) and the slope detection point, and the first piston piece (11) and the second piston piece (12) move away from each other under the action of negative pressure, thereby stretching the second spring (14). The gas conveying assembly comprises an elastic rubber piece (16) fixedly installed between the rotating block (15) and the first piston piece (11), the elastic rubber piece (16) is in a cylindrical shape under the action of no external force, and the elastic rubber piece (16) maintains the initial state of being twisted under the elastic rotation of the rotating block (15), the elastic rubber piece (16) is stretched during the movement of the first piston piece (11) and the second piston piece (12) away from each other, and the elastic rubber piece (16) drives the rotating block (15) to elastically rotate under the action of material elasticity when stretched. The gas conveying assembly further comprises a gas conveying hose (17) fixedly connected between the fixed tube (10) and the elastic rubber piece (16), the lower end of the fixed tube (10) is in communication with the gas holes uniformly arranged at the lower end of the negative pressure cylinder (1), the rotating block (15) is uniformly penetrated by the exhaust pipe (18), and the gas conveying hose (17) and the exhaust pipe (18) are both provided with a one-way valve structure, the elastic rubber piece (16) draws the dust generated during polishing through the fixed tube (10) and the gas conveying hose (17) during the stretching and unfolding process, and the dust inhaled by the elastic rubber piece (16) is uniformly laid on the detection point during the twisting process through the exhaust pipe (18).

2. The leak detection apparatus for water seepage in a slope according to claim 1, wherein: The negative pressure cylinder (1) and the sleeve (3) are coaxially arranged, the rotating seat (4) is rotatably arranged on the outer side of the middle part of the negative pressure cylinder (1), the first spring (5) is fixedly connected between the lower end surface of the rotating seat (4) and the inner side of the lower end of the sleeve (3), and the negative pressure cylinder (1) and the sleeve (3) are elastically connected.

3. The leak detection apparatus for water seepage in a slope according to claim 2, wherein: The lower end surface of the sleeve (3) is elastically and equiangularly connected with the rotating rod (6), the lower end of the rotating rod (6) is fixedly connected with the polishing piece, the polishing piece and the sealing rubber ring (9) are arranged in a position corresponding to each other in an up-down manner, the lower part of the rotating rod (6) is provided with a slope structure, the sealing rubber ring (9) contacts the slope of the lower part of the rotating rod (6) and pushes the rotating rod (6) to elastically rotate during the expansion and contraction adjustment of the negative pressure cylinder (1) and the sleeve (3), and the sealing rubber ring (9) is tightly attached to the polishing position on the slope.

4. The leak detection apparatus for water seepage in a slope according to claim 3, wherein: The lower part of the negative pressure cylinder (1) is provided with a spiral-shaped guide groove (7), the lower end inner wall of the sleeve (3) is embedded with the ball (8), and the ball (8) rolls along the guide groove (7) during the expansion and contraction adjustment of the negative pressure cylinder (1) and the sleeve (3), so as to drive the sleeve (3) to drive the rotating rod (6) to rotate, and the polishing of the detection position of the slope is realized.

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