A device for detecting non-excavation sewer pipe leakage

Abstract

The utility model provides a kind of for non-excavation drainage pipeline leakage detection device, it is related to drainage pipeline leakage detection technical field, including moving shaft, the moving shaft both ends are fixedly installed with coaxial arrangement's connector, two the connector opposite end surface is detachably installed with the sealing washer for being used to with drainage pipeline inner resistance cooperation and wherein one connector end surface is equipped with water inlet valve and water pump valve, two the sealing washer opposite side edge is fixedly installed with several moving blocks, by being equipped with two sealing washers, after moving shaft moves to detection position, only needs to use sealing washer sealing detection area both end position, by filling up water between two sealing washers, and by monitoring water pressure change can judge whether leakage, without emptying and cleaning the water of entire drainage pipeline, easy to operate, can guarantee detection speed.

Description

Technical Field

[0001] This utility model relates to the field of drainage pipeline leakage detection technology, and in particular to a detection device for non-excavation drainage pipeline leakage. Background Technology

[0002] Leak detection in underground drainage pipes is a crucial step in ensuring the safe operation of urban pipe networks. Therefore, a leak detection device for underground drainage pipes, with publication number CN221991255U, is proposed. The device is placed entirely inside the drainage pipe. A walking robot is wirelessly controlled via a control handle. A hydraulic support rod raises the robot, positioning the spray nozzle at the center of the drainage pipe, propelling the robot forward. Simultaneously, a ground-based water supply system is activated, allowing high-pressure sprayers to flush away dirt and debris from the drainage pipe. Fluorescent agent is then supplied via a ground-based fluorescent agent supply system, and the spray nozzles apply the fluorescent agent to the inner wall of the drainage pipe. Images are captured by a camera at this point.

[0003] However, because the fluorescent agent needs to be sprayed onto the inner wall of the drainage pipe using a spray nozzle, the entire inside of the pipe needs to be emptied and cleaned during actual testing to ensure that the inside of the pipe is clean, which increases the number of operation steps. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a detection device for leakage in trenchless drainage pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a detection device for leakage in trenchless drainage pipes, comprising a movable shaft, with coaxial connectors fixedly installed at both ends of the movable shaft. Sealing gaskets for damping within the drainage pipe are detachably installed on the opposite end faces of the two connectors, and an inlet valve and a drain valve are installed on one end face of one connector. Several movable blocks are fixedly installed on the opposite edges of the two sealing gaskets. A water spray hood is rotatably mounted on the surface of the movable shaft between the two sealing gaskets, and three first electric push rods are installed on both ends of the water spray hood on the surface of the movable shaft. The three first electric push rods are respectively positioned facing the top and sides of the drainage pipe, and rollers are installed on their telescopic ends. The inlet valve is a three-way valve with two outlets for connecting the drainage pipe and the water spray hood, respectively. The drain valve inlet faces downwards and is equipped with a telescopic sleeve. A pressure sensor is fixedly installed on the surface of the movable shaft.

[0006] Preferably, the inlet of the water inlet valve is equipped with an inlet pipe, and the outlet of the water pump valve is equipped with a drain pipe, and both the drain pipe and the inlet pipe are connected through a connector.

[0007] Preferably, a second electric push rod is provided between the telescopic part inside the telescopic sleeve and the moving shaft.

[0008] Preferably, each of the two connectors has a coaxially mounted hydraulic rod embedded at the center of its opposite end, and a slider is fixedly mounted on the telescopic end of the hydraulic rod. An electric telescopic rod is provided between the moving block and the connector.

[0009] Preferably, the bottom end of the electric telescopic rod cylinder is hinged to the connector head, and the telescopic end of the electric telescopic rod is fixedly connected to the moving block.

[0010] Preferably, several electric telescopic rods on the same connector are arranged in a circular array around the hydraulic rod on the same connector, and a connecting arm is hinged to the cylinder of the electric telescopic rod near the top.

[0011] Preferably, the connecting arm is snapped onto the surface of the connecting head, and the other end of the connecting arm is hinged to the side of the slider.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by setting two sealing gaskets, after the moving shaft moves to the detection position, it is only necessary to use the sealing gaskets to seal the two ends of the detection area. By filling the space between the two sealing gaskets with water and monitoring the water pressure change, it is possible to determine whether there is a leak. It is not necessary to drain and clean the entire drainage pipe. The operation is simple and the detection speed can be guaranteed.

[0014] 2. In this utility model, the movement of the slider is achieved by the extension and retraction of the hydraulic rod, and the swing of the electric telescopic rod is achieved under the connecting action of the connecting arm. This allows the electric telescopic rod to drive the corresponding connected moving block to move, so that the outer edge of the sealing gasket can be elastically deformed and folded without fitting into the inner wall of the drainage pipe, which facilitates the movement of the moving shaft inside the drainage pipe. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a detection device for leakage in trenchless drainage pipelines;

[0016] Figure 2 This invention provides a detection device for leakage in trenchless drainage pipes. Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 3 This invention provides a detection device for leakage in trenchless drainage pipes. Figure 2 A schematic diagram of the structure viewed from below;

[0018] Figure 4 for Figure 1 A top-down sectional view of the structure.

[0019] Legend: 1. Spray nozzle; 2. Moving shaft; 3. First electric push rod; 4. Roller; 5. Sealing gasket; 6. Electric telescopic rod; 7. Moving block; 8. Connector; 9. Connecting arm; 10. Slider; 11. Water inlet pipe; 12. Drain pipe; 13. Water pumping valve; 14. Water inlet valve; 15. Telescopic sleeve; 16. Second electric push rod; 17. Hydraulic rod; 18. Pressure sensor. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figures 1-4 As shown, a device for detecting leakage in trenchless drainage pipes includes a movable shaft 2. In actual use, the movable shaft 2 moves forward within the drainage pipe. Coaxial connectors 8 are fixedly installed at both ends of the movable shaft 2. Sealing gaskets 5 for damping within the drainage pipe are detachably installed on the opposite end faces of both connectors 8. One end face of connector 8 is equipped with an inlet valve 14 and a drain valve 13. In actual use, the sealing gaskets 5 at both ends ensure a seal at both ends of the movable shaft 2. Under the action of the inlet valve 14, this space is filled with water. Leakage is determined by monitoring changes in water pressure. An inlet pipe 11 is installed at the inlet of the inlet valve 14, and a drain pipe 12 is installed at the outlet of the drain valve 13. The inlet pipe 11 and the outlet pipe 12 are connected by a common pipe rolling machine. Two water pumps are used to connect the inlet pipe 11 and the outlet pipe 12 to realize water filling and pumping. The pipe rolling machine is used to wind the inlet pipe 11 and the outlet pipe 12 to facilitate the release length of the inlet pipe 11 and the outlet pipe 12 according to the movement of the moving shaft 2. Both the outlet pipe 12 and the inlet pipe 11 are set through the connector 8. After the test is completed, the water is pumped out using the pumping valve 13. Or, if there is sludge in the outlet pipe, the water in that part of the space is first pumped out using the pumping valve 13, and then the residual sludge in that part of the space is flushed out using the inlet valve 14. The flushed sludge is then pumped out using the pumping valve 13. After rinsing clean, the pipe is refilled with water, and the water pressure is monitored in real time.

[0023] Furthermore, three first electric push rods 3 are installed on the surface of the movable shaft 2 at both ends of the spray cover 1. The three first electric push rods 3 are respectively set towards the top edge and sides of the drainage pipe, and rollers 4 are installed on the telescopic ends. By extending the first electric push rods 3, the rollers 4 are pressed against the inner wall of the drainage pipe, which can ensure that the movable shaft 2 is coaxial with the drainage pipe. The rolling of the rollers 4 against the inner wall of the drainage pipe ensures that the movable shaft 2 will not rotate inside the drainage pipe. Similarly, by installing a motor on the rollers 4 to drive the rollers 4 to rotate, the movable shaft 2 can move inside the drainage pipe.

[0024] Several movable blocks 7 are fixedly installed on the opposite edges of the two sealing gaskets 5. A water spray cover 1 is rotatably installed on the surface of the movable shaft 2 between the two sealing gaskets 5. The water inlet valve 14 is a three-way valve with two outlets for connecting the drainage pipe and the water spray cover 1, respectively. The water inlet of the water pumping valve 13 faces downward and is equipped with a telescopic sleeve 15. A second electric push rod 16 is set between the telescopic part inside the telescopic sleeve 15 and the movable shaft 2. A pressure sensor 18 is fixedly installed on the surface of the movable shaft 2. Water is injected into the water spray cover 1 through one of the outlets of the water inlet valve 14, and the water sprayed out by the water spray cover 1 impacts the inner wall of the drainage pipe to achieve rinsing. Alternatively, water is injected into the space between the two sealing gaskets 5 in the drainage pipe through the other outlet bracket. The second electric push rod 16 in this scheme extends and pushes the movable part of the telescopic sleeve 15 down to contact the bottom of the drainage pipe, which facilitates the drainage of water in this area. The pressure sensor 18 can monitor the water pressure in real time.

[0025] Two connectors 8 are each embedded with a coaxially arranged hydraulic rod 17 at their respective center points. A slider 10 is fixedly installed at the telescopic end of the hydraulic rod 17. An electric telescopic rod 6 is provided between the moving block 7 and the connector 8. The bottom end of the cylinder of the electric telescopic rod 6 is hinged to the connector 8, and the telescopic end of the electric telescopic rod 6 is fixedly connected to the moving block 7. Several electric telescopic rods 6 on the same connector 8 are arranged in a circular array around the hydraulic rod 17 on the same connector 8. A connecting arm 9 is hinged to the cylinder of the electric telescopic rod 6 near the top. The connecting arm 9 is engaged with the surface of the connector 8, and the other end of the connecting arm 9 is hinged to the side of the slider 10. In actual use, the slider 10 is moved by the telescopic movement of the hydraulic rod 17. Under the connecting action of the connecting arm 9, the electric telescopic rod 6 swings, which enables the electric telescopic rod 6 to drive the corresponding moving block 7 to move. This allows the outer edge of the sealing gasket 5 to elastically deform and fold without fitting against the inner wall of the drainage pipe, facilitating the movement of the moving shaft 2 within the drainage pipe.

[0026] Working principle: Taking the absence of silt in the drainage pipe as an example, the moving shaft 2 moves by rolling against the inner wall of the drainage pipe via the roller 4. After moving to the detection position, the hydraulic rod 17 retracts to move the slider 10. Under the connecting push of the connecting arm 9, the second electric push rod 16 swings. Under the elastic reset action of the sealing gasket 5, the sealing gasket 5 is made into a complete ring shape with its outer edge attached to the inner wall of the drainage pipe. Water is filled between the two sealing gaskets 5 through the water inlet pipe 11 and the water inlet valve 13. The pressure sensor 18 detects the change in water pressure. If the water pressure decreases, it indicates a leak, i.e., a gap. If the water pressure remains unchanged, there is no problem. After the detection is completed, the water is pumped out using the pumping valve 14 in conjunction with the drain pipe 12.

[0027] The wiring diagrams for the first electric push rod 3, electric telescopic rod 6, water pumping valve 13, water inlet valve 14, second electric push rod 16, hydraulic rod 17, and pressure sensor 18 in this utility model are common knowledge in the field. Their working principles are known technologies, and the appropriate models are selected according to actual use. Therefore, the control methods and wiring arrangements for the first electric push rod 3, electric telescopic rod 6, water pumping valve 13, water inlet valve 14, second electric push rod 16, hydraulic rod 17, and pressure sensor 18 will not be explained in detail.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A detection device for leakage in trenchless drainage pipes, characterized in that: The system includes a movable shaft (2), with coaxial connectors (8) fixedly installed at both ends. Sealing gaskets (5) for damping within the drainage pipe are detachably installed on the opposite end faces of both connectors (8). One connector (8) has an inlet valve (14) and a drain valve (13) installed on its end face. Several movable blocks (7) are fixedly installed on the opposite edges of the two sealing gaskets (5). A water spray cover is rotatably mounted on the surface of the movable shaft (2) between the two sealing gaskets (5). 1), and three first electric push rods (3) are installed on the surface of the moving shaft (2) at both ends of the spray cover (1). The three first electric push rods (3) are respectively set towards the top edge and sides of the drainage pipe and rollers (4) are installed on the telescopic ends. The water inlet valve (14) is a three-way valve and the two outlets are respectively used to connect the drainage pipe and the spray cover (1). The water inlet of the water pump (13) faces downward and is equipped with a telescopic sleeve (15). A pressure sensor (18) is fixedly installed on the surface of the moving shaft (2).

2. The detection device for non-excavation drainage pipeline leakage according to claim 1, characterized in that: The inlet of the water inlet valve (14) is equipped with an inlet pipe (11), and the outlet of the water pump valve (13) is equipped with a drain pipe (12). Both the drain pipe (12) and the inlet pipe (11) pass through the connector (8).

3. The detection device for non-excavation drainage pipeline leakage according to claim 1, characterized in that: A second electric push rod (16) is provided between the telescopic part inside the telescopic sleeve (15) and the moving shaft (2).

4. The detection device for non-excavation drainage pipeline leakage according to claim 1, characterized in that: Two connectors (8) are each fitted with a coaxially arranged hydraulic rod (17) at the center of their opposite ends. A slider (10) is fixedly installed at the telescopic end of the hydraulic rod (17). An electric telescopic rod (6) is provided between the moving block (7) and the connector (8).

5. The detection device for non-excavation drainage pipeline leakage according to claim 4, characterized in that: The bottom end of the cylinder of the electric telescopic rod (6) is hinged to the connector (8), and the telescopic end of the electric telescopic rod (6) is fixedly connected to the moving block (7).

6. The detection device for non-excavation drainage pipeline leakage according to claim 4, characterized in that: Several electric telescopic rods (6) on the same connector (8) are arranged in a circular array around the hydraulic rod (17) on the same connector (8), and the cylinder of the electric telescopic rod (6) is hinged with a connecting arm (9) near the top.

7. The detection device for non-excavation drainage pipeline leakage according to claim 6, characterized in that: The connecting arm (9) is engaged with the surface of the connecting head (8), and the other end of the connecting arm (9) is hinged to the side of the slider (10).

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