A power plant safety intelligent monitoring device based on internet of things

Abstract

The application discloses a power plant safety intelligent monitoring device based on the Internet of Things, which comprises annular guide vane shaft connecting plates and wheel shaft connecting plates, the guide vane shaft connecting plates can be connected to each guide vane shaft of an impeller machine, the wheel shaft connecting plates can be sleeved in the wheel shaft of the impeller machine, and three inclined deformation sensors are uniformly distributed between the guide vane shaft connecting plates and the wheel shaft connecting plates in a circumferential direction. Compared with the prior art, the application can meet the monitoring requirement, reduce the manufacturing and maintenance costs of the device, and provides an efficient and economical safety monitoring solution for a power plant.

Description

Technical Field

[0001] This invention relates to the field of power plant safety monitoring technology, specifically to an intelligent power plant safety monitoring device based on the Internet of Things. Background Technology

[0002] Mixed-flow turbines, commonly used in power plants, use multiple guide vanes distributed around their circumference to guide water flow and scour the impeller. This generates torque on the impeller shaft, driving a generator to produce electricity. Ideally, the impeller shaft and guide vane shafts of a mixed-flow turbine only bear torque forces and should not experience axial vibration. However, due to complex hydrodynamic processes, the shape and arrangement of the vanes can cause variations and non-uniformity in the water flow inside the turbine, leading to additional axial forces on the turbine bearings and causing abnormal conditions. The presence of these abnormal axial forces can affect the stability and safety of the equipment, and even lead to equipment failure and damage. During turbine operation, it is impossible to accurately determine which guide vane or impeller blade is causing the abnormal axial force. This necessitates extensive maintenance work when abnormal conditions occur, including disassembling and inspecting components such as the guide vane shaft and impeller to pinpoint the specific source of the problem. This not only increases the complexity and workload of maintenance but also leads to prolonged equipment downtime and increased production losses. In practical applications, if corresponding sensors are installed on the impeller shaft and each guide vane shaft, the overall cost will increase significantly. Furthermore, as the number of sensors increases, the complexity of the monitoring system will also increase, requiring the design of more complex data acquisition and processing systems to ensure the accuracy and real-time performance of sensor data. Coordination and calibration between sensors will also require more work.

[0003] Simply increasing the number of sensors to monitor the vibration of impeller shafts and guide vane shafts is neither economical nor practical. Therefore, it is necessary to provide an IoT-based intelligent safety monitoring device for power plants. This device, through the rational deployment of a small number of sensors, can monitor axial vibration, providing reliable monitoring and early warning functions while reducing costs and monitoring complexity. Such intelligent monitoring equipment can ensure efficient and reliable operation of power plants. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: an intelligent power plant safety monitoring device based on the Internet of Things, comprising an annular guide vane shaft connecting plate and a wheel shaft connecting plate, wherein the guide vane shaft connecting plate can be connected to each guide vane shaft of the impeller, and the wheel shaft connecting plate can be fitted into the wheel shaft of the impeller; and three inclined deformation sensors are evenly distributed circumferentially between the guide vane shaft connecting plate and the wheel shaft connecting plate.

[0005] Furthermore, as a preferred embodiment, multiple guide shafts are fixed in the edge of the guide vane shaft connecting plate, and each guide shaft is connected to the wheel axle connecting plate through a guide ball.

[0006] Furthermore, as a preferred embodiment, the guide vane shaft connecting plate has through holes corresponding to the position of each guide vane shaft, and each through hole has a rotatable lower rotating ring, which can be sleeved in each guide vane shaft.

[0007] Furthermore, as a preferred embodiment, the lower rotating ring has multiple clamping blocks circumferentially distributed, each capable of moving radially along the lower rotating ring.

[0008] Furthermore, as a preferred embodiment, a right-angled triangular wedge is fixed to the back of the clamping block, and an annular clamping plate is provided above the guide vane shaft connecting plate. An upper rotating ring is rotatably provided on the clamping plate corresponding to the position of each lower rotating ring, and the upper rotating ring can fit into the corresponding ring of wedges.

[0009] Furthermore, as a preferred embodiment, the guide vane shaft connecting plate and the clamping plate are connected by multiple bolts.

[0010] Furthermore, as a preferred embodiment, the wheel axle connecting plate is rotatably provided with a wheel axle collar at its center, and the inner wall of the wheel axle collar is provided with an adsorption block, which is made of magnetic material.

[0011] Furthermore, preferably, the guide ball is rotatably disposed in the sliding plate, the sliding plate is telescopically embedded in the side of the wheel axle connecting plate, and the guide shaft slidably passes through the guide ball.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention enables real-time monitoring of the axial vibration of the wheel shaft and guide vane shaft, allowing for timely detection of potential faults and anomalies. By monitoring the equipment's operating status, timely measures can be taken to prevent accidents and safety risks caused by equipment failures. Maintenance personnel can more easily inspect and repair the guide vane shaft and wheel shaft, reducing manpower and time costs during maintenance.

[0014] Traditional monitoring methods may require more complex sensor systems or equipment, increasing the number of components and installation difficulty, as well as costs. In this invention, by evenly distributing three inclined deformation sensors between the guide vane shaft connecting plate and the wheel axle connecting plate, relative vertical displacement and tilt can be accurately recorded. This design not only reduces the number of sensors required but also simplifies the structure and improves the reliability and stability of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an IoT-based intelligent safety monitoring device for power plants connected to a water turbine.

[0016] Figure 2 This is a schematic diagram of the structure of an IoT-based intelligent safety monitoring device for power plants.

[0017] Figure 3 This is a schematic diagram of the cross-section of an IoT-based intelligent safety monitoring device for power plants.

[0018] Figure 4 This is a schematic diagram of the structure when the wheel axle connecting plate is horizontal;

[0019] Figure 5 This is a schematic diagram of the structure when the wheel axle connecting plate is tilted.

[0020] In the figure: 1. Guide vane shaft connecting plate; 2. Clamping plate; 21. Upper rotating ring; 3. Deformation sensor; 4. Wheel shaft connecting plate; 5. Wheel shaft collar; 51. Adsorption block; 6. Bolt; 7. Lower rotating ring; 8. Clamping block; 9. Wedge block; 10. Guide shaft; 11. Guide ball; 12. Sliding plate. Detailed Implementation

[0021] Please see Figure 1 In this embodiment of the invention, an IoT-based intelligent safety monitoring device for power plants includes an annular guide vane shaft connecting plate 1 and a wheel shaft connecting plate 4. The guide vane shaft connecting plate 1 can be connected to each guide vane shaft of the impeller, and the wheel shaft connecting plate 4 can be fitted into the wheel shaft of the impeller. Three inclined deformation sensors 3 are evenly distributed circumferentially between the guide vane shaft connecting plate 1 and the wheel shaft connecting plate 4. The relative vertical displacement and inclination of the guide vane shaft connecting plate 1 and the wheel shaft connecting plate 4 can be recorded by the three deformation sensors 3. When the guide vane shaft connecting plate 1 and the wheel shaft connecting plate 4 undergo parallel vertical displacement, it can be determined that the wheel shaft is experiencing axial vibration, and the wheel shaft and the impeller connected to it should be checked. When the guide vane shaft connecting plate 1 and the wheel shaft connecting plate 4 are inclined, it can be determined that the guide vane shaft in a certain direction is experiencing axial vibration, and the guide vane shaft and the guide vane connected to it should be checked. The direction can be determined by the difference in the values ​​of the three deformation sensors 3.

[0022] Please see Figure 2 In this embodiment, multiple guide shafts 10 are fixed in the edge of the guide vane shaft connecting plate 1, and each guide shaft 10 is connected to the wheel axle connecting plate 4 through a guide ball 11. This prevents relative rotation between the guide vane shaft connecting plate 1 and the wheel axle connecting plate 4, thus avoiding interference with the three deformation sensors 3.

[0023] In this embodiment, the guide vane shaft connecting plate 1 has through holes corresponding to the position of each guide vane shaft, and each through hole has a rotatable lower rotating ring 7, which can be sleeved in each guide vane shaft.

[0024] Please see Figure 3 In this embodiment, the lower rotating ring 7 has multiple clamping blocks 8 that can move radially along the lower rotating ring 7.

[0025] In this embodiment, a right-angled triangular wedge 9 is fixed on the back of the clamping block 8, and an annular clamping plate 2 is provided above the guide vane shaft connecting plate 1. An upper rotating ring 21 is rotatably provided on the clamping plate 2 corresponding to the position of each lower rotating ring 7, and the upper rotating ring 21 can fit with the corresponding ring of wedge 9.

[0026] In this embodiment, the guide vane shaft connecting plate 1 and the clamping plate 2 are connected by multiple bolts 6. By adjusting the screw depth of the bolts 6, the distance between the guide vane shaft connecting plate 1 and the clamping plate 2 can be changed, so that the upper rotating ring 21 pushes the wedge block 9, causing the clamping block 8 to clamp the guide vane shaft inward. Moreover, the upper rotating ring 21 and the lower rotating ring 7 can rotate with the guide vane shaft, so that the axial displacement of the guide vane shaft can be transmitted to the guide vane shaft connecting plate 1 without hindering the rotation of the guide vane shaft.

[0027] In this embodiment, the wheel axle connecting plate 4 is rotatably provided with a wheel axle collar 5 at its center. The inner wall of the wheel axle collar 5 is provided with an adsorption block 51, which is made of magnetic material. When the wheel axle collar 5 is fitted into the wheel axle, the adsorption block 51 attracts the wheel axle, and the wheel axle collar 5 can rotate with the wheel axle, so that the axial displacement of the wheel axle can be transmitted to the wheel axle connecting plate 4 without hindering the rotation of the wheel axle.

[0028] Please see Figure 4 and Figure 5 In this embodiment, the guide ball 11 is rotatably disposed in the sliding plate 12, and the sliding plate 12 is telescopically embedded in the side of the wheel axle connecting plate 4. The guide shaft 10 slidably passes through the guide ball 11. That is to say, under the action of the guide shaft 10, the guide vane shaft connecting plate 1 and the wheel axle connecting plate 4 cannot rotate relative to each other. When the guide vane shaft connecting plate 1 tilts, the sliding plate 12 can extend, so it will not affect the tilt of the guide vane shaft connecting plate 1.

[0029] The torque of the wheel axle is transmitted to the wheel axle connecting plate 4 under the friction of the wheel axle collar. Since the guide vane shaft connecting plate 1 and the wheel axle connecting plate 4 cannot rotate relative to each other, the torque of the wheel axle connecting plate 4 will not affect the deformation sensor 3, so that the deformation sensor 3 only records the relative vertical displacement and tilt of the guide vane shaft connecting plate 1 and the wheel axle connecting plate 4.

[0030] In practice,

[0031] Place the annular guide vane shaft connecting plate 1 above the guide vane shaft. By adjusting the screwing depth of the bolt 6, the distance between the guide vane shaft connecting plate 1 and the clamping plate 2 can be changed, thereby causing the upper rotating ring 21 to push the wedge block 9 and the clamping block 8 to clamp the guide vane shaft. Since the upper rotating ring 21 and the lower rotating ring 7 can follow the rotation of the guide vane shaft, they do not hinder the rotation of the guide vane shaft.

[0032] The wheel axle connecting plate 4 is put onto the impeller shaft and the suction block 51 is attached to the impeller shaft, so that the wheel axle collar 5 can follow the rotation of the impeller shaft. In this way, the axial displacement of the impeller shaft can be transmitted to the wheel axle connecting plate 4 through the wheel axle collar 5, without hindering the rotation of the impeller shaft.

[0033] Three inclined deformation sensors 3 are evenly connected between the guide vane shaft connecting plate 1 and the impeller shaft connecting plate 4. These sensors record the relative vertical displacement and tilt between the guide vane shaft connecting plate 1 and the impeller shaft connecting plate 4, allowing for the detection of axial vibration of the impeller shaft. When the guide vane shaft connecting plate 1 and the impeller shaft connecting plate 4 experience parallel vertical displacement, it can be determined that the impeller shaft is vibrating axially, and the impeller shaft and its connected impeller should be inspected. When the guide vane shaft connecting plate 1 and the impeller shaft connecting plate 4 tilt, it can be determined that a particular guide vane shaft is vibrating axially, and that guide vane shaft and its connected guide vanes should be inspected. The difference in the values ​​measured by the deformation sensors 3 can determine the tilt direction of the guide vane shaft.

[0034] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An Internet of Things based intelligent monitoring device for power plant safety, comprising a ring-shaped guide vane shaft connecting plate (1) and a wheel shaft connecting plate (4), characterized in that, The guide vane shaft connecting plate (1) can be connected to each guide vane shaft of the impeller machine, the wheel shaft connecting plate (4) can be sleeved in the wheel shaft of the impeller machine, three inclined deformation sensors (3) are uniformly connected circumferentially between the guide vane shaft connecting plate (1) and the wheel shaft connecting plate (4), and the relative up-down displacement and inclination between the guide vane shaft connecting plate (1) and the wheel shaft connecting plate (4) are recorded through the deformation sensors (3). 2.The power plant safety intelligent monitoring device based on Internet of Things according to claim 1, characterized in that, A plurality of guide shafts (10) are fixed in the edge of the guide vane shaft connecting plate (1), and each guide shaft (10) is connected with the wheel shaft connecting plate (4) through a guide ball (11). 3.The power plant safety intelligent monitoring device based on Internet of Things according to claim 1, characterized in that, The guide vane shaft connecting plate (1) is provided with a through hole corresponding to the position of each guide vane shaft, and a lower swivel ring (7) is rotatably arranged in each through hole.

4. The power plant safety intelligent monitoring device based on the Internet of Things according to claim 3, characterized in that, A plurality of clamping blocks (8) capable of moving radially along the lower swivel ring (7) are circumferentially distributed in the lower swivel ring (7).

5. The power plant safety intelligent monitoring device based on the Internet of Things according to claim 4, characterized in that, The back of the clamping block (8) is fixed with a right-angled triangular wedge block (9), and the upper surface of the guide vane shaft connecting plate (1) is provided with an annular clamping plate (2), the clamping plate (2) is rotatably provided with an upper swivel ring (21) corresponding to the position of each lower swivel ring (7), and the upper swivel ring (21) can be attached to a corresponding circle of wedge blocks (9). 6.The power plant safety intelligent monitoring device based on Internet of Things according to claim 5, characterized in that, The guide vane shaft connecting plate (1) and the clamping plate (2) are connected by a plurality of bolts (6). 7.The power plant safety intelligent monitoring device based on Internet of Things according to claim 1, wherein, The wheel shaft sleeve ring (5) is rotatably arranged in the center of the wheel shaft connecting plate (4), and the inner wall of the wheel shaft sleeve ring (5) is provided with an adsorption block (51) made of magnetic material. 8.The power plant safety intelligent monitoring device based on Internet of Things according to claim 2, characterized in that, The guide ball (11) is arranged in the sliding plate (12) and can be universally rotated, the sliding plate (12) is telescopically embedded in the side surface of the wheel shaft connecting plate (4), and the guide shaft (10) can slide through the guide ball (11).

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