Plant flooding monitoring and alarming device for hydropower station

Abstract

A plant flooding monitoring alarm device for a hydropower station comprises a PLC control cabinet, a monitoring mechanism, a manual trigger mechanism and a sound-light alarm mechanism, the PLC control cabinet and the monitoring mechanism are both electrically connected with a public LCU in a hydropower station plant, and the manual trigger mechanism and the sound-light alarm mechanism are both electrically connected with the PLC control cabinet; the monitoring mechanism comprises a plurality of leakage sensors used for monitoring the state of a leakage pump, a plurality of top cover sensors used for monitoring the state of a top cover pump and a plurality of floater sensors used for monitoring the water level of accumulated water in a plant. The audible and visual alarm mechanism comprises a plurality of audible and visual alarms, each audible and visual alarm comprises an alarm control panel, and the alarm control panel is electrically connected with a loudspeaker and an alarm lamp; the manual trigger mechanism comprises a core trigger button and a plurality of terminal trigger buttons, the core trigger button is electrically connected with the PLC control cabinet, and the terminal trigger buttons are electrically connected with the alarm control panel. According to the utility model, a mode of matching automatic monitoring and manual triggering is adopted, so that the safety is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station safety technology, specifically a monitoring and alarm device for flooding powerhouses in hydropower stations. Background Technology

[0002] Flooding of the powerhouse is a serious safety accident at a hydroelectric power station. The water source can originate from external sources, such as sudden heavy rain, flash floods, or mudslides, or from internal sources, such as broken fasteners in the flow channels, ruptured water supply pipes causing significant leakage, ruptured drainage pipes during maintenance, or turbine lift-off accidents. Flooding often occurs very suddenly, submerging a large amount of facilities and equipment within a short period and threatening the lives of personnel inside the powerhouse.

[0003] In the existing technology, in order to quickly alert staff to evacuate in the event of a potential flooding accident, many hydropower stations have installed alarm systems. These systems mainly use water level sensors installed in different locations to monitor whether there is water accumulation inside the plant, in order to determine whether flooding is possible. If flooding is possible, staff are warned to evacuate quickly.

[0004] However, because the hydropower plant has a large space and a lot of internal equipment, it is difficult to deploy sensors in all locations, inevitably resulting in monitoring blind spots. This may lead to a failure to issue timely warnings in the event of a flooding accident, preventing on-site personnel from evacuating in time. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a monitoring and alarm device for flooding power plant buildings in hydropower stations, which adopts a combination of automatic monitoring and manual triggering, significantly improving safety.

[0006] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a monitoring and alarm device for flooding of a hydropower plant, comprising a PLC control cabinet, a monitoring mechanism, a manual triggering mechanism, and an audible and visual alarm mechanism, wherein the PLC control cabinet and the monitoring mechanism are both electrically connected to the common LCU in the hydropower plant, and the manual triggering mechanism and the audible and visual alarm mechanism are both electrically connected to the PLC control cabinet.

[0007] The monitoring mechanism includes multiple leakage sensors for monitoring the status of leakage pumps, multiple top cover sensors for monitoring the status of top cover pumps, and multiple float sensors for monitoring the water level in the plant.

[0008] The sound and light alarm mechanism includes multiple sound and light alarms, each of which includes an alarm control board, which is electrically connected to a speaker and a warning light.

[0009] The manual triggering mechanism includes a core trigger button and multiple terminal trigger buttons, wherein the core trigger button is electrically connected to the PLC control cabinet, and the terminal trigger buttons are electrically connected to the alarm control board.

[0010] As a further optimization of the above-mentioned monitoring and alarm device for flooding of the power plant in a hydropower station: the PLC control cabinet is also electrically connected to an industrial television, which is used to display the operating status of the monitoring mechanism, the manual triggering mechanism, and the audible and visual alarm mechanism.

[0011] As a further optimization of the above-mentioned monitoring and alarm device for flooding of the power plant in a hydropower station: the PLC control cabinet is also connected to the host computer of the hydropower plant.

[0012] As a further optimization of the above-mentioned monitoring and alarm device for water flooding in a hydropower station: the monitoring mechanism also includes multiple top cover water level gauges correspondingly installed in the turbine top cover, which are used to monitor the water level inside the turbine top cover.

[0013] As a further optimization of the above-mentioned monitoring and alarm device for flooding powerhouse in a hydropower station: the PLC control cabinet includes a main control module CP and a power supply module PS that are electrically connected, and the main control module CP is electrically connected to a digital signal input module DI, a digital signal output module DO, and an analog signal input module AI.

[0014] As a further optimization of the above-mentioned monitoring and alarm device for flooding of power plant in a hydropower station: the audible and visual alarm includes a housing, the alarm control board is installed inside the housing, the speaker, the warning light and the terminal trigger button are all fixedly installed on the housing, and the housing is also provided with a volume adjustment knob electrically connected to the alarm control board.

[0015] As a further optimization of the above-mentioned monitoring and alarm device for flooding of the power plant in a hydropower station: the housing is fixedly connected to a protective cover, and the protective cover has an opening; the speaker is located inside the protective cover and faces the opening; and the warning light is located outside the protective cover.

[0016] As a further optimization of the above-mentioned monitoring and alarm device for flooding of power plant buildings in hydropower stations: a protective net is fixedly fitted on the warning light, and the protective net is fixedly connected to the protective cover.

[0017] As a further optimization of the above-mentioned monitoring and alarm device for flooding powerhouse in a hydropower station: the audible and visual alarm includes a support plate, several mounting plates are vertically fixedly connected to the edge of the support plate, a sleeve is fixedly connected to the middle of the support plate, a base plate is fixedly connected to the housing, a central shaft is fixedly connected to the base plate, and the central shaft is inserted into the sleeve.

[0018] As a further optimization of the above-mentioned monitoring and alarm device for flooding powerhouse in a hydropower station: the base plate is vertically fixedly connected to a back plate, and the back plate is vertically fixedly connected to two parallel connecting plates, which are perpendicular to the base plate. The protective cover is located between the two connecting plates, and the protective cover and the connecting plates are rotatably connected by a pitch adjustment shaft.

[0019] Beneficial effects: This utility model can be deployed based on the existing public LCU of the hydropower station, making it easier to install; this utility model can monitor various risk factors that may lead to flooding of the powerhouse and promptly warn the staff in the powerhouse through the audible and visual alarm mechanism, reminding them to evacuate in time to avoid danger; this utility model also has a manual triggering mechanism, which can be triggered by staff inside the powerhouse or from the centralized control center. If the audible and visual alarm mechanism fails to act in time due to blind spots in the monitoring mechanism, the audible and visual alarm mechanism can be manually triggered to fully ensure the safety of the staff. Attached Figure Description

[0020] Figure 1 This is an overall structural block diagram of this utility model;

[0021] Figure 2 This is a simplified schematic diagram of a PLC control cabinet.

[0022] Figure 3 This is a structural diagram of an audible and visual alarm.

[0023] Figure 4 This is a schematic diagram of how the support plate is set up.

[0024] Figure description: 1-Support plate, 2-Sleeve, 3-Base plate, 4-Volume adjustment knob, 5-Terminal trigger button, 6-Housing, 7-Speaker, 8-Protective cover, 9-Warning light, 10-Protective net, 11-Back plate, 12-Connecting plate, 13-Pitch adjustment hinge, 14-Mounting plate, 15-Central axis. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 and 2A monitoring and alarm device for flooding of a hydropower plant includes a PLC control cabinet, a monitoring mechanism, a manual triggering mechanism, and an audible and visual alarm mechanism. The PLC control cabinet and the monitoring mechanism are electrically connected to a common LCU in the hydropower plant, and the manual triggering mechanism and the audible and visual alarm mechanism are electrically connected to the PLC control cabinet.

[0027] The monitoring system includes multiple leakage sensors for monitoring the status of leakage pumps, multiple top cover sensors for monitoring the status of top cover pumps, and multiple float sensors for monitoring the water level in the plant.

[0028] The audible and visual alarm mechanism includes multiple audible and visual alarms, each of which includes an alarm control board. The alarm control board is electrically connected to a speaker 7 and a warning light 9.

[0029] The manual triggering mechanism includes a core trigger button and multiple terminal trigger buttons 5, wherein the core trigger button is electrically connected to the PLC control cabinet, and the terminal trigger buttons 5 are electrically connected to the alarm control board.

[0030] During the operation of the hydropower station, the monitoring agency continuously monitors risk factors that could lead to flooding of the powerhouse. Specifically, leakage sensors are used to monitor the operating status of leakage pumps. When a leakage pump starts to drain water, it indicates that water may have entered the powerhouse due to changes in geological structure, which could cause flooding. Top cover sensors are used to monitor the operating status of top cover pumps. When a top cover pump starts, it indicates that the water level inside the top cover is too high, which could cause flooding of the powerhouse. Float sensors are used to directly monitor the water level inside the powerhouse. If the water level is too high, it could cause flooding of the powerhouse. Because existing power plant buildings typically already have some sensors deployed, such as float sensors in some locations, and these existing sensors are all connected to the common LCU (Local Control Unit), the newly added leakage sensors, top cover sensors, and float sensors can be directly connected to the common LCU. This allows for direct integration of the PLC control cabinet into the existing hydropower station control system, making deployment easier. To reduce the difficulty of system connection and debugging, a PLC control cabinet from the same manufacturer as the common LCU can be selected based on its actual condition. Data collected by various monitoring agencies is aggregated by the common LCU and transmitted to the PLC control cabinet. The PLC control cabinet assesses the possibility of flooding in the power plant and identifies the risk locations. When a flood risk is detected, the PLC control cabinet activates the pneumatic audible and visual alarms, emitting an audible alarm from speaker 7 and a visual alarm from warning light 9, alerting personnel inside the power plant and enabling them to evacuate quickly to avoid danger. Given the large area of ​​the plant, it is difficult to deploy monitoring equipment without blind spots. If some risk factors are not detected, but staff discover these risk factors during their work, they can trigger the audible and visual alarm mechanism through terminal trigger button 5. On the other hand, all data processed by the PLC control cabinet can be manually judged by staff at the hydropower station's centralized control center. When it is determined that the plant may be flooded, the audible and visual alarm mechanism can be triggered through the core trigger button.

[0031] This invention can be deployed based on the existing public LCU of the hydropower station, making it easier to install. It can monitor various risk factors that may lead to flooding of the powerhouse and promptly warn personnel in the powerhouse through an audible and visual alarm mechanism, reminding them to evacuate in time to avoid danger. This invention also includes a manual triggering mechanism, which can be triggered by personnel inside the powerhouse or from the centralized control center. If the audible and visual alarm mechanism fails to activate in time due to blind spots or other reasons, it can be manually triggered, fully ensuring the safety of personnel.

[0032] To facilitate real-time monitoring of all data by staff in the centralized control center, the PLC control cabinet is also electrically connected to an industrial television. This television displays the operating status of the monitoring mechanisms, manual triggering mechanisms, and audible and visual alarm mechanisms. Furthermore, the PLC control cabinet is also connected to the host computer in the hydropower station building. Both the industrial television and the host computer are existing equipment within the hydropower station and will not be described in detail here.

[0033] To further ensure the accuracy of the monitoring results and expand the monitoring scope, the monitoring agency also includes multiple top cover water level gauges installed in the turbine top cover. These top cover water level gauges are used to monitor the water level inside the turbine top cover.

[0034] The PLC control cabinet consists of an electrically connected main control module (CP) and a power supply module (PS). The main control module (CP) is electrically connected to a digital signal input module (DI), a digital signal output module (DO), and an analog signal input module (AI). More specifically, 220V AC mains power is used as the external power supply, converted to 24V DC by an ADC and input to the power supply module (PS). The power supply module (PS) then powers the other modules in the PLC control cabinet. The audible and visual alarm is also powered by 220V AC mains power and its status is controlled by a switch module (K), which is electrically connected to the analog signal output module (AI). The digital signal input module (DI) is used to acquire data from the common LCU.

[0035] Please see Figure 3 and 4 The specific structure of the audible and visual alarm is as follows: The audible and visual alarm includes a housing 6, an alarm control board is installed inside the housing 6, a speaker 7, a warning light 9, and a terminal trigger button 5 are all fixedly installed on the housing 6, and a volume adjustment knob 4 electrically connected to the alarm control board is also provided on the housing 6. The volume adjustment knob 4 is used to control the volume of the speaker 7.

[0036] Considering the complex environment in the factory, a protective cover 8 is fixedly connected to the housing 6 to protect the audible and visual alarm. The protective cover 8 has an opening, and the speaker 7 is installed inside the protective cover 8 facing the opening. The warning light 9 is installed outside the protective cover 8, and a protective net 10 is fixedly fitted onto the warning light 9, with the protective net 10 fixedly connected to the protective cover 8. The protective cover 8 protects the speaker 7, and by controlling the direction of the opening, the orientation of the speaker 7 can be controlled, allowing it to face areas with high concentrations of workers or areas where workers frequently move around, ensuring that warnings are issued to workers. The protective net 10 protects the warning light 9, preventing the lampshade from being damaged by external objects, thus ensuring that the light emitted by the warning light 9 has a better warning effect.

[0037] Considering the complex structure of equipment in the factory, it is difficult for the audible and visual alarm to be directed towards densely populated or frequently used areas, resulting in reduced warning effectiveness. To solve this problem, the audible and visual alarm includes a support plate 1. Several mounting plates 14 are vertically fixed to the edge of the support plate 1. The mounting plates 14 are used to fix the audible and visual alarm to a wall or equipment casing. A sleeve 2 is fixedly connected to the middle of the support plate 1. A base plate 3 is fixedly connected to the casing 6. A central shaft 15 is fixedly connected to the base plate 3 and inserted into the sleeve 2. Through the cooperation of the central shaft 15 and the sleeve 2, the base plate 3 can drive the casing 6 to rotate relative to the support plate 1, thereby changing the orientation of the speaker 7. A certain amount of friction is required between the central shaft 15 and the sleeve 2 to fix the central shaft 15 and prevent the speaker 7 from tilting due to rotation of the central shaft 15 without external force. On the other hand, a back plate 11 is vertically fixedly connected to the substrate 3. Two parallel connecting plates 12 are vertically fixedly connected to the back plate 11, and the connecting plates 12 are perpendicular to the substrate 3. A protective cover 8 is located between the two connecting plates 12, and the protective cover 8 is rotatably connected to the connecting plates 12 via a pitch adjustment shaft 13. Specifically, the pitch adjustment shaft 13 is fixedly connected to the protective cover 8, and a through hole is provided on the connecting plate 12 for the pitch adjustment shaft 13 to pass through. The pitch angle of the protective cover 8 and the speaker 7 can be adjusted via the pitch adjustment shaft 13. Of course, there should also be a certain amount of friction between the connecting plate 12 and the pitch adjustment shaft 13.

[0038] Furthermore, the structure of the alarm control board in the audible and visual alarm, as well as the connection and control methods with the speaker 7 and the warning light 9, are all mature existing technologies and will not be elaborated here.

[0039] Finally, it should be noted that, given the actual situation of hydropower stations, sensors can be installed at any water intake location that may cause flooding of the powerhouse and connected to the common LCU. This is a conventional technology in the field and will not be elaborated further here.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A monitoring and alarming device for a power plant building flooded by water, characterized in that, The monitoring mechanism, the manual triggering mechanism and the sound and light alarm mechanism are all electrically connected with the PLC control cabinet. The monitoring mechanism comprises a plurality of leakage sensors for monitoring the state of the leakage pump, a plurality of top cover sensors for monitoring the state of the top cover pump and a plurality of float sensors for monitoring the water level in the power plant. The sound and light alarm mechanism comprises a plurality of sound and light alarms, each of which comprises an alarm control board electrically connected with a loudspeaker (7) and a warning light (9). The manual triggering mechanism comprises a core triggering button and a plurality of terminal triggering buttons (5), wherein the core triggering button is electrically connected with the PLC control cabinet, and the terminal triggering buttons (5) are electrically connected with the alarm control board.

2. A monitoring and alarming device for a power plant with a flooded powerhouse according to claim 1, characterized in that, The PLC control cabinet is further electrically connected with an industrial television for displaying the running state of the monitoring mechanism, the manual triggering mechanism and the sound and light alarm mechanism.

3. A monitoring and alarming device for a power plant with a flooded powerhouse according to claim 1, characterized in that, The PLC control cabinet is further in communication connection with a host computer in the hydropower plant.

4. The monitoring and alarming device for the flooded powerhouse of a hydropower station according to claim 1, characterized in that, The monitoring mechanism further comprises a plurality of top cover water level gauges correspondingly arranged in the top cover of the water turbine, for monitoring the water level in the top cover of the water turbine.

5. The monitoring and alarming device for the flooded power house of a hydroelectric power station according to claim 1, characterized in that, The PLC control cabinet comprises a main control module CP and a power supply module PS electrically connected, and the main control module CP is electrically connected with a digital signal input module DI, a digital signal output module DO and an analog signal input module AI.

6. A monitoring and alarming device for a power plant with a flooded powerhouse according to claim 1, characterized in that, The sound and light alarm comprises a shell (6), the alarm control board is arranged in the shell (6), the loudspeaker (7), the warning light (9) and the terminal triggering button (5) are all fixedly arranged on the shell (6), and the shell (6) is further provided with a volume adjusting knob (4) electrically connected with the alarm control board.

7. A monitoring and alarming device for a flooded powerhouse of a hydroelectric power station according to claim 6, characterized in that, The shell (6) is fixedly connected with a protective cover (8), the protective cover (8) has an opening, the loudspeaker (7) is arranged in the protective cover (8) and faces the opening, and the warning light (9) is arranged outside the protective cover (8).

8. A monitoring and alarming device for a flooded powerhouse of a hydroelectric power station according to claim 7, characterized in that, A protective net (10) is fixedly arranged on the warning light (9) and fixedly connected with the protective cover (8).

9. A monitoring and alarming device for a power plant with a flooded powerhouse according to claim 7, characterized in that, The sound and light alarm comprises a support plate (1), a plurality of mounting plates (14) are vertically fixedly connected to the edge position of the support plate (1), a sleeve (2) is fixedly connected to the middle part of the support plate (1), the shell (6) is fixedly connected with a base plate (3), the base plate (3) is fixedly connected with a central shaft (15), and the central shaft (15) is inserted into the sleeve (2).

10. A monitoring and alarming device for a power plant with a flooded powerhouse according to claim 9, characterized in that, The base plate (3) is vertically fixedly connected with a back plate (11), the back plate (11) is vertically fixedly connected with two parallel connecting plates (12), the connecting plates (12) are perpendicular to the base plate (3), the protective cover (8) is located between the two connecting plates (12), and the protective cover (8) and the connecting plates (12) are rotationally connected through a pitch adjusting rotating shaft (13).

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