A device for detecting a runner of a hydraulic turbine

Abstract

The utility model belongs to the water turbine runner detection technical field, especially relates to a water turbine runner detection device. Its technical scheme is: a water turbine runner detection device, including the seal cylinder, the seal cylinder is connected on the conical tube small door of the conical tube below the runner, be provided with the detector in the seal cylinder, the detector is carried with the propulsion unit, is used for adsorbing the adsorption unit on the blade, the mechanical arm, the detection unit that is connected in the mechanical arm terminal, the navigation unit that is connected with the propulsion unit signal and the communication unit that interacts with the ground. The utility model provides a kind of water turbine runner detection device of drainage-free, detection flexible.

Description

Technical Field

[0001] This utility model belongs to the field of water turbine runner testing technology, and specifically relates to a water turbine runner testing device. Background Technology

[0002] Turbine runner inspection is a key item in unit maintenance. Traditional turbine runner blade inspection requires draining the water from the unit, which is time-consuming, labor-intensive, and affects power generation efficiency. In existing technologies, some underwater inspection equipment relies on manual operation or fixed sensors, which suffers from poor flexibility, low detection accuracy, and inability to cover complex curved surfaces.

[0003] The existing technology has the following disadvantages: 1. The unit needs to be shut down for drainage, and the material preparation time is long; 2. The tailrace valve needs to be opened; 3. The maintenance frame for the turbine needs to be erected, which poses a great risk of working at height; 4. The working environment is poor and the labor intensity is high; 5. After the maintenance is completed, the working casing and tailrace valve seal need to be restored, and all bolts need to be replaced, resulting in a large material consumption. Utility Model Content

[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a water turbine runner testing device that does not require drainage and is flexible in testing.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A turbine runner detection device includes a sealing cylinder connected to a small gate of a cone tube below the runner. A detector is installed inside the sealing cylinder. The detector is equipped with a propulsion unit, an adsorption unit for adsorbing onto the blades, a robotic arm, a detection unit connected to the end of the robotic arm, a navigation unit connected to the propulsion unit, and a communication unit for interacting with the ground.

[0007] The detector of this invention enters through a small gate on the conical tube below the turbine. A navigation unit and a propulsion unit automatically advance the detector to the required detection position. A robotic arm drives the detection unit to perform integrated surface morphology, crack, and corrosion detection. The detection results are transmitted to the ground in real time via a communication unit. The entire detection process requires no fixed sensors or maintenance scaffolding, thus eliminating the need to drain the water body, resulting in high detection efficiency and reduced manual labor.

[0008] The detector of this invention is propelled by a propulsion unit, navigated by a navigation unit, and fixed by an adsorption unit, allowing it to accurately stop at the required detection position. A robotic arm drives the detection unit to move and steer, enabling accurate detection of various positions on the rotating wheel. The detector can automatically position itself to be detected, improving flexibility and detection accuracy, and is capable of detecting complex curved surfaces.

[0009] As a preferred embodiment of this utility model, a butterfly valve is connected to the tapered tube gate, and a connecting flange is provided at the open end of the sealing cylinder. The connecting flange is connected to the butterfly valve on the side away from the tapered tube gate by connecting bolts. The tailrace gate pressure of the power plant unit is generally around 0.35MPa. Under extreme operating conditions, the pressure pulsation generated by the spiral belt is 4%*197m. Therefore, a 1.6MPa-rated butterfly valve is installed at the tapered tube gate.

[0010] In a preferred embodiment of this invention, the propulsion unit is a vector thruster, and the adsorption unit is an adaptive adsorption device. The adsorption unit can stably adhere to the blade surface in high-flow-rate environments (e.g., magnetic adsorption or vacuum adsorption).

[0011] As a preferred embodiment of this invention, the detection unit includes a high-definition camera, a laser scanner, an ultrasonic flaw detector, and an eddy current sensor. The detector is equipped with a multi-degree-of-freedom robotic arm, the end of which integrates a high-definition camera, a laser scanner, an ultrasonic flaw detector, and an eddy current sensor, supporting integrated detection of surface morphology, cracks, and corrosion.

[0012] As a preferred embodiment of this utility model, the navigation unit includes an inertial navigation system (INS) and a sonar positioning module, which, combined with the three-dimensional model of the rotating wheel, realizes centimeter-level path planning.

[0013] In a preferred embodiment of this invention, the communication unit is an underwater wireless communication device or an optical fiber, and the communication unit interacts with the ground control center. Underwater wireless communication (such as an underwater acoustic modem) or optical fiber is used to interact with the ground control center, transmitting detection data and high-definition video streams in real time.

[0014] As a preferred embodiment of this invention, the sealed cylinder is equipped with an optical fiber signal interface and a power supply, both of which are connected to the detector via cables. The power supply uses a safe 24V or 36V voltage and is connected to the detector via a wired connection, providing a stable power supply.

[0015] In a preferred embodiment of this invention, an automatic cable retractor is installed inside the sealed cylinder. The cables connecting the fiber optic signal interface and the power supply to the detector are wound around the automatic cable retractor. The automatic cable retractor automatically retracts and extends the cable, with the retracting and extending speed matching the moving speed of the detector.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The detector of this invention enters through a small gate on the conical tube below the turbine. A navigation unit and a propulsion unit automatically advance the detector to the required detection position. A robotic arm drives the detection unit to perform integrated detection of surface morphology, cracks, and corrosion. The detection results are transmitted to the ground in real time via a communication unit. The entire detection process requires no fixed sensors or maintenance scaffolding, thus eliminating the need to drain the water body, resulting in high detection efficiency and reduced manual labor.

[0018] 2. The detector of this invention is propelled by a propulsion unit, navigated by a navigation unit, and fixed by an adsorption unit, allowing it to accurately stop at the required detection position. A robotic arm drives the detection unit to move and steer, enabling accurate detection of various positions on the rotating wheel. The detector can automatically position itself to be detected, improving flexibility and detection accuracy, and is capable of detecting complex curved surfaces. Attached Figure Description

[0019] Figure 1 This is an assembly drawing of the utility model and the tapered tube;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1-Sealing cylinder; 2-Detector; 3-Butterfly valve; 4-Automatic retractor; 5-Rotator; 6-Cone tube; 11-Connecting flange; 12-Fiber optic signal interface; 13-Power supply; 61-Cone tube small door; 62-Cone tube door. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0024] like Figure 1As shown, the cone pipe 6 is located below the impeller 5. A cone pipe gate 62 and a cone pipe smaller gate 61 are installed upstream of the cone pipe 6. Both gates are closed during operation and standby. The cone pipe gate 62 and cone pipe smaller gate 61 are opened when inspection of the impeller 5 and the flow channel is required. The cone pipe smaller gate 61 is used to set up a maintenance platform. In the prior art, during unit operation, water flows axially into the cone pipe 6 after passing through the impeller 5 and is discharged to the tailrace. After the unit stops, the cone pipe 6 is filled with water under certain pressure, and there is no water flow, allowing inspection to be carried out inside the impeller 5 during this period.

[0025] like Figure 2 As shown, the turbine runner detection device of this embodiment includes a sealing cylinder 1, which is connected to the cone tube gate 61 of the cone tube 6 below the runner 5. A detector 2 is installed inside the sealing cylinder 1. The detector 2 is equipped with a propulsion unit, an adsorption unit for adsorbing onto the blades, a robotic arm, a detection unit connected to the end of the robotic arm, a navigation unit that is signal-connected to the propulsion unit, and a communication unit that interacts with the ground.

[0026] A butterfly valve 3 is connected to the tapered gate 61. A connecting flange 11 is provided at the open end of the sealing cylinder 1. The connecting flange 11 is connected to the butterfly valve 3 on the side away from the tapered gate 61 by connecting bolts. The tailrace gate pressure of the power plant unit is generally around 0.35MPa. Under extreme conditions, the pressure pulsation generated by the spiral belt is 4%*197m. Therefore, a butterfly valve with a pressure rating of 1.6MPa is installed at the tapered gate 61.

[0027] The detector 2 of this invention enters through the conical gate 61 on the conical pipe 6 below the turbine. The navigation unit and the propulsion unit automatically advance the detector 2 to the required detection position. The robotic arm drives the detection unit to perform integrated detection of surface morphology, cracks, and corrosion. The detection results are transmitted to the ground in real time through the communication unit. The entire detection process does not require the installation of fixed sensors or the erection of maintenance scaffolds. Therefore, there is no need to drain the water body, resulting in high detection efficiency and reduced manual labor.

[0028] The detector 2 of this invention is propelled by a propulsion unit, navigated by a navigation unit, and fixed by an adsorption unit, allowing it to accurately stop at the required detection position. A robotic arm drives the detection unit to move and steer, enabling accurate detection at various positions of the rotating wheel 5. The detector 2 can automatically position itself to the detection location, improving flexibility and detection accuracy, and is capable of detecting complex curved surfaces.

[0029] Specifically, the propulsion unit is a vector thruster, and the adsorption unit is an adaptive adsorption device. The adsorption unit can stably adhere to the blade surface in high-flow-rate environments (e.g., magnetic adsorption or vacuum adsorption).

[0030] The detection unit includes a high-definition camera, a laser scanner, an ultrasonic flaw detector, and an eddy current sensor. Detector 2 is equipped with a multi-degree-of-freedom robotic arm, with the high-definition camera, laser scanner, ultrasonic flaw detector, and eddy current sensor integrated at the end of the arm, supporting integrated detection of surface morphology, cracks, and corrosion. Detector 2 uses a high-definition camera capable of detecting cracks smaller than a human hair and can also be equipped with multiple cluster sensors (such as positioning and measurement sensors).

[0031] The navigation unit includes an inertial navigation system (INS) and a sonar positioning module, which, combined with the 3D model of the rotating wheel 5, achieves centimeter-level path planning.

[0032] The communication unit is an underwater wireless communication device or optical fiber, which interacts with the ground control center. It uses underwater wireless communication (such as an underwater acoustic modem) or optical fiber to interact with the ground control center, transmitting detection data and high-definition video streams in real time. A computer is connected outside the sealed cylinder 1 for operation, observation, and data collection and storage.

[0033] In this embodiment, the communication unit is an optical fiber. The sealed cylinder 1 is equipped with an optical fiber signal interface 12 and a power supply 13, both of which are connected to the detector 2 via cables. The power supply 13 uses a safe voltage of 24V or 36V and is connected to the detector 2 via a wire to provide a stable power supply.

[0034] An automatic cable retractor 4 is installed inside the sealed cylinder 1. The cables connecting the fiber optic signal interface 12 and the power supply 13 to the detector 2 are wound around the automatic cable retractor 4. The automatic cable retractor 4 automatically retracts and extends the cable, with the speed matching the moving speed of the detector 2.

[0035] The method for testing a water turbine runner includes the following steps:

[0036] S1: When the rotating wheel 5 needs to be checked, connect the sealing cylinder 1 to the butterfly valve 3; open the butterfly valve 3, fill the sealing cylinder 1 with water, and release the detector 2 after the sealing cylinder 1 and the cone tube 6 are at equal pressure.

[0037] S2: The navigation unit guides the detector 2, the propulsion unit drives the detector 2, the adsorption unit adsorbs onto the blade, the robotic arm drives the detector unit to move and turn, the detector unit performs integrated detection of surface morphology, cracks and corrosion on the rotating wheel 5, and the detection results are transmitted to the ground in real time through the communication unit; during the movement of the detector 2, the automatic cable retractor 4 automatically retracts and extends the cable, and the retracting and extending speed matches the moving speed of the detector 2.

[0038] S3: After the rotor 5 is repaired, retract the detector 2 into the sealing cylinder 1 and close the butterfly valve; drain the water from the sealing cylinder 1, loosen the connecting bolts between the sealing cylinder 1 and the butterfly valve 3, complete the separation of the sealing cylinder 1 and the butterfly valve 3, and complete the inspection of the rotor 5.

[0039] S4: After the inspection is completed, a three-dimensional defect map and quantitative assessment report are generated to guide maintenance decisions.

[0040] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A turbine runner testing device, characterized in that: It includes a sealing cylinder (1), which is connected to the cone tube door (61) of the cone tube (6) below the rotor (5). A detector (2) is installed inside the sealing cylinder (1). The detector (2) is equipped with a propulsion unit, an adsorption unit for adsorbing onto the blade, a robotic arm, a detection unit connected to the end of the robotic arm, a navigation unit connected to the propulsion unit, and a communication unit for interacting with the ground.

2. The turbine runner testing device according to claim 1, characterized in that: A butterfly valve (3) is connected to the tapered tube gate (61), and a connecting flange (11) is provided at the open end of the sealing cylinder (1). The connecting flange (11) is connected to the butterfly valve (3) on the side away from the tapered tube gate (61) by connecting bolts.

3. The turbine runner testing device according to claim 1, characterized in that: The propulsion unit is a vector thruster.

4. The turbine runner testing device according to claim 1, characterized in that: The adsorption unit is an adaptive adsorption device.

5. The turbine runner testing device according to claim 1, characterized in that: The detection unit includes a high-definition camera, a laser scanner, an ultrasonic flaw detector, and an eddy current sensor.

6. The turbine runner testing device according to claim 1, characterized in that: The navigation unit includes an inertial navigation system and a sonar positioning module.

7. The turbine runner testing device according to claim 1, characterized in that: The communication unit is an underwater wireless communication device that interacts with the ground control center.

8. The turbine runner testing device according to claim 1, characterized in that: The communication unit is an optical fiber, and it interacts with the ground control center.

9. The turbine runner testing device according to claim 1, characterized in that: The sealed cylinder (1) is equipped with an optical fiber signal interface (12) and a power supply (13), and both the optical fiber signal interface (12) and the power supply (13) are connected to the detector (2) via cables.

10. A turbine runner testing device according to claim 9, characterized in that: An automatic take-up device (4) is installed inside the sealed cylinder (1). The cables between the fiber optic signal interface (12) and the power supply (13) and the detector (2) are wound around the automatic take-up device (4).

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