Water turbine set top cover waste water collecting device

Abstract

The utility model discloses a water turbine set top cover waste water collecting device which comprises a negative pressure assembly and at least one set of suction assembly which are connected with each other, the negative pressure assembly is connected with the suction assembly through a liquid pumping pipeline, a liquid pumping control assembly is arranged on the liquid pumping pipeline, and a first liquid level sensor is arranged on the suction assembly. The negative pressure assembly is further connected with a liquid discharging assembly. Only several small-size suction assemblies are arranged in an on-site liquid accumulation area, in a limited water turbine set top cover area, the waste water collection function can be achieved, daily passing and maintenance of a water turbine set are not affected, and the problems that the area of a set top cover is large, multiple water splashing points exist, the water splashing positions are random, the accumulated water thickness is small, the available space is narrow, and the occupied space is large are solved. Therefore, the wastewater collection difficulty is high. In addition, the problem that the failure rate of mechanical parts is increased due to the fact that the site is humid and dirty is solved.

Description

Technical Field

[0001] This utility model relates to a wastewater collection device for the top cover of a water turbine unit, belonging to the technical field of wastewater collection and treatment equipment. Background Technology

[0002] During the operation of the hydro turbine units in the power plant, a certain amount of oil-water mixture exists in the top cover of the mixed-flow turbine unit due to the evaporation of turbine oil from the bearings in various parts of the unit and the splashing of water in the main shaft sealing water tank. Because the top cover of the unit has a large area, numerous splashing points, and random splashing locations, the accumulated water is thin, and the available space is limited, making wastewater collection difficult. Furthermore, the site is relatively humid and dirty, increasing the failure rate of mechanical components.

[0003] Currently, most common automatic wastewater collection devices are unsuitable for wastewater collection on the top cover of power plant turbine units due to their structural limitations. This is mainly because: (1) Wastewater collection devices using submersible pumps are unsuitable for this condition because the accumulated liquid thickness is too thin to meet the minimum operating liquid level requirement of the pump, and there is no suitable location for a large accumulation tank. (2) Wastewater collection devices using self-priming pumps are unsuitable because the self-priming pumps are too large to fit on-site, and functional expansion is difficult. Furthermore, the dirty working environment leads to a high failure rate, making them unsuitable for this condition. (3) Wastewater collection devices using vacuum pump sets are unsuitable because of their large size, complex system, difficult maintenance, and poor economic efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a wastewater collection device for the top cover of a hydroelectric turbine unit, to solve the problems of difficulty in wastewater collection due to the large area of ​​the turbine unit's top cover, numerous and random splashing points, thin water accumulation, and limited usable space. Furthermore, the damp and dirty environment at the site increases the failure rate of mechanical components.

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

[0006] A wastewater collection device for the top cover of a hydro turbine unit includes a negative pressure component and at least one set of suction components connected to each other. The negative pressure component is connected to the suction components through a liquid extraction pipe. The liquid extraction pipe is equipped with a liquid extraction control component. The suction components are equipped with a first liquid level sensor. The negative pressure component is also connected to a drain component.

[0007] Alternatively, the negative pressure assembly includes a buffer tank, a circulation pump connected inside the buffer tank, a vacuum valve connected to the outlet of the circulation pump, a vacuum generator connected to the outlet of the vacuum valve, and the outlet of the vacuum generator connected to the buffer tank; the vacuum generator includes an inlet, an outlet, and a suction port, the inlet being connected to the vacuum valve, the outlet being connected to the buffer tank, and the suction port being connected to the suction assembly via a liquid extraction control assembly.

[0008] Alternatively, the drainage assembly includes a drainage branch located between the circulation pump and the vacuum valve, wherein a drainage valve and a drainage port are sequentially provided along the flow direction on the drainage branch.

[0009] Optionally, a pressure gauge may be provided at the branch port of the drainage branch.

[0010] Alternatively, the drainage assembly may include a bottom drain valve located at the bottom of the buffer tank.

[0011] Alternatively, a second liquid level sensor may be provided at the bottom of the buffer tank.

[0012] Alternatively, the liquid extraction control assembly includes a quick-connect interface, a liquid extraction valve, a maintenance valve, and a vacuum gauge arranged sequentially along the flow direction; the liquid extraction pipeline includes at least one liquid extraction branch for connecting to the suction assembly, the liquid extraction branches are connected in parallel and converge into the main liquid extraction pipeline before connecting to the negative pressure assembly, the quick-connect interface and the liquid extraction valve are respectively provided on each liquid extraction branch, and the maintenance valve and the vacuum gauge are provided on the main liquid extraction pipeline.

[0013] Alternatively, the liquid extraction pipeline may further include a reserved branch, which is connected in parallel with the liquid extraction branch, and the reserved branch is provided with a reserved interface and a reserved valve in sequence along the flow direction.

[0014] Optionally, the suction assembly includes a box body with an opening at the bottom and a water inlet on the side of the box body. A positioning tube is provided inside the box body, with the bottom of the positioning tube located inside the box body and the top of the positioning tube detachably connected to the liquid suction pipe. The first liquid level sensor is a probe type, with the probe of the first liquid level sensor located inside the box body.

[0015] Optionally, a filter screen is provided on the inside of the water inlet.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] 1. This utility model provides a wastewater collection device for the turbine generator set roof. In the area of ​​accumulated liquid, only a few small suction components are installed. Within the limited area of ​​the turbine generator set roof, wastewater collection can be achieved without affecting the daily passage and maintenance of the turbine generator set. The suction components of this device are arranged at multiple points and operate independently, which can fully address the problems of random splashing points and uneven splashing. Furthermore, this wastewater collection device can drain the accumulated water in the turbine generator set roof area, effectively preventing environmental degradation such as slipperiness and foul odors caused by prolonged liquid accumulation.

[0018] 2. The turbine generator top cover wastewater collection device provided by this utility model features a compact design for the negative pressure component, resulting in a simple system structure and small footprint. Furthermore, it can be installed in a location far from water accumulation areas and in a relatively favorable environment, reducing equipment failure rates and facilitating maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the process flow of this utility model.

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

[0021] Figure 3 This is a schematic diagram of the absorption component structure of this utility model.

[0022] The markings in the diagram are: 1-Buffer tank, 2-Circulation pump, 3-Vacuum valve, 4-Vacuum generator, 401-Inlet, 402-Outlet, 403-Suction port, 5-Vacuum gauge, 6-Maintenance valve, 7-Suction valve, 8-Reserved valve, 9-Reserved interface, 11-Suction assembly, 111-Box body, 112-Positioning tube, 113-First liquid level sensor, 114-Filter screen, 12-Second liquid level sensor, 13-Pressure gauge, 14-Drain valve, 15-Drain interface, 16-Bottom drain valve, 17-Quick-connect interface. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] A wastewater collection device for the top cover of a water turbine unit, such as Figure 1-3As shown, it includes a negative pressure assembly and at least one set of suction assemblies 11 connected to each other. The negative pressure assembly is connected to the suction assemblies 11 through a liquid extraction pipe. The liquid extraction pipe is equipped with a liquid extraction control assembly. The suction assemblies 11 are equipped with a first liquid level sensor 113. The negative pressure assembly is also connected to a drain assembly.

[0026] The negative pressure component generates suction through negative pressure to actively absorb the thin layer of water accumulated on the surface of the top cover, without relying on the liquid level itself. Multiple suction components 11 are arranged according to the top cover area and splashing patterns. Each component corresponds to an independent suction pipe and a first liquid level sensor 113. The distributed suction components 11 achieve full-area coverage. The first liquid level sensor 113 monitors the water accumulation at each point in real time and initiates suction as needed. The suction control component can individually control the on / off state of each suction component 11, avoiding unnecessary energy consumption. The negative pressure component and the suction components 11 are connected through suction pipes and can be flexibly arranged in the gaps around the top cover without occupying central space. This solves the problem of thin and unevenly distributed water accumulation and avoids the frequent start-stop or inability to start of traditional water pumps due to insufficient liquid level. Specifically, this embodiment includes one negative pressure component and three suction components 11. The negative pressure component is installed in an area far from the wastewater collection point, in a relatively good environment, and in a convenient location for operation and maintenance, solving the problems of limited space and increased mechanical component failure rate in this working condition. The suction components 11 are installed at the three lowest points in the liquid accumulation area. During the operation of the turbine unit, regardless of where a leak or splash occurs, the water will eventually flow and collect at these three lowest points for timely drainage. If there is a large amount of splashing water from the turbine unit, and if one suction component 11 cannot suction enough water, the water accumulation area will gradually increase and extend to the areas of other suction components 11, allowing multiple suction components 11 to work simultaneously and in parallel, thus improving the drainage capacity of the wastewater collection device. The first liquid level sensor 113 uses an existing probe-type liquid level sensor, with a high liquid level set to 20mm, an ultra-high liquid level set to 100mm, and a low liquid level set to 5mm. It is powered by a DC 24V safe voltage and equipped with an oil-resistant armored cable 208 to prevent electric shock. The wiring connector uses a plug-in type special connector for easy maintenance. At the same time, the connector is positioned above the highest liquid level to prevent it from being submerged by excessive water accumulation.

[0027] In another specific embodiment, the negative pressure component includes a buffer tank 1, a circulation pump 2 connected inside the buffer tank 1, a vacuum valve 3 connected to the outlet of the circulation pump 2, a vacuum generator 4 connected to the outlet of the vacuum valve 3, and the outlet of the vacuum generator 4 connected to the buffer tank 1; the vacuum generator 4 includes an inlet 401, an outlet 402, and a suction port 403, the inlet 401 is connected to the vacuum valve 3, the outlet 402 is connected to the buffer tank 1, and the suction port 403 is connected to the suction component 11 through a liquid extraction control component.

[0028] The buffer tank 1 serves as a temporary storage space for wastewater, acting as a buffer and stabilizing water flow while providing the working medium for the circulating pump 2. The circulating pump 2 extracts the fluid from the buffer tank 1, which is then sent to the vacuum generator 4 after passing through the vacuum valve 3. The vacuum valve 3 controls the flow rate and pressure of the fluid entering the vacuum generator 4, ensuring stable system operation. The vacuum generator 4, as a key component, receives fluid from the vacuum valve 3 through the inlet 401. The fluid pressure generates negative pressure at the suction port 403, which, through the suction control component connected to the suction component 11, draws wastewater from the turbine top cover into the system. The resulting wastewater and fluid mix and return to the buffer tank 1 from the outlet 402, forming a cycle. This system generates negative pressure through its own fluid circulation without relying on an external air source, reducing equipment complexity and energy consumption, and lowering operating costs. The buffer tank 1 effectively avoids the risk of system blockage due to untimely wastewater collection, providing temporary storage and buffering of wastewater to ensure continuous and stable system operation. Complex moving parts are less prone to damage in humid and dirty environments, reducing maintenance frequency and difficulty.

[0029] In another specific embodiment, the drainage assembly includes a drainage branch located between the circulation pump 2 and the vacuum valve 3. A drainage valve 14 and a drainage port 15 are sequentially arranged along the flow direction on this drainage branch. The drainage branch is connected in parallel between the circulation pump 2 and the vacuum valve 3, allowing for synchronous drainage while the negative pressure assembly is continuously operating. When the wastewater in the buffer tank 1 reaches the set level, opening the drainage valve 14 allows the pressure of the circulation pump 2 to drain the wastewater without stopping the pump or disrupting the vacuum, ensuring the continuity of the wastewater collection process. The standardized design of the drainage port 15 facilitates the connection of external hoses or pipes, and its location at the outlet end of the circulation pump 2 utilizes the pump's pressure to assist in drainage. The first liquid level sensor 113 is automatically interlocked with the pumping valve 7, the circulating pump 2, and the vacuum valve 3. When the liquid level at the accumulation point rises to 20mm, the circulating pump 2 automatically starts and the corresponding pumping valve 7 automatically opens to pump out the liquid. When the liquid level at the accumulation point drops to a low level, the corresponding pumping valve 7 closes after a delay, ensuring that the water at the accumulation point can be completely drained. The delay closing time of the pumping valve 7 can be set according to the actual site conditions, minimizing unnecessary operating energy consumption while ensuring that the wastewater at the accumulation point is completely drained.

[0030] In another specific implementation, a pressure gauge 13 is installed at the branch port of the drainage branch. This gauge directly reflects the output pressure of the circulating pump 2 and the resistance of the drainage branch. Combined with the parameters of the vacuum valve 3 and the circulating pump 2, it can assist in adjusting the working efficiency of the negative pressure system.

[0031] In another specific embodiment, the drainage assembly includes a bottom drain valve 16 located at the bottom of the buffer tank 1. Wastewater and deposited solid impurities in the buffer tank 1 can be directly discharged through the valve without relying on the pressure drive of the circulation pump 2. It can also empty the wastewater in the buffer tank 1 for maintenance. The bottom drain valve 16 is independent of the negative pressure circulation system, so the entire device does not need to be shut down during maintenance.

[0032] In another specific implementation, a second liquid level sensor 12 is provided at the bottom of the buffer tank 1. The second liquid level sensor 12 can provide real-time feedback on the liquid level data at the bottom of the buffer tank 1. When the liquid level in the buffer tank 1 drops to an extremely low level, the second liquid level sensor 12 triggers a signal, preventing the circulation pump 2 from starting and avoiding damage from dry running, thus avoiding equipment failure caused by mechanical idling. When the liquid level drops to a low level, the circulation pump 2 automatically stops, saving equipment operating energy consumption. When the liquid level rises to a high level, the sensor is interlocked with the drain valve 14, automatically opening the drain valve 14 to discharge wastewater to subsequent treatment equipment, ensuring a stable liquid level in the buffer tank 1 and avoiding the risk of overflow. Through real-time bottom liquid level data, the drainage strategy can be adjusted according to the on-site working conditions, optimizing energy consumption while ensuring wastewater drainage efficiency.

[0033] In another specific implementation, the liquid extraction control component includes a quick-connect interface 17, a liquid extraction valve 7, a maintenance valve 6, and a vacuum gauge 5 arranged sequentially along the flow direction. The liquid extraction pipeline includes at least one liquid extraction branch for connecting to the suction component 11. The liquid extraction branches are connected in parallel and converge into the main liquid extraction pipeline before connecting to the negative pressure component. The quick-connect interface 17 and the liquid extraction valve 7 are correspondingly located on each liquid extraction branch, while the maintenance valve 6 and the vacuum gauge 5 are located on the main liquid extraction pipeline. The quick-connect interface 17 enables quick assembly and disassembly of the pipeline, and the liquid extraction valve 7 independently controls the on / off state of each branch. In actual field use, if the three liquid extraction valves 7 are insufficient to cover the entire liquid accumulation area due to changes in operating conditions, the function can be easily expanded through this interface without modifying the vacuum device. Multiple branches are connected in parallel and converge into the main pipeline. The maintenance valve 6 on the main pipeline can isolate the negative pressure component from the liquid extraction pipeline, and the vacuum gauge 5 monitors the vacuum level of the main pipeline in real time.

[0034] In another specific implementation, the liquid extraction pipeline further includes a reserved branch, which is connected in parallel with the liquid extraction branch. The reserved branch is provided with a reserved interface 9 and a reserved valve 8 sequentially along the flow direction. One end of the reserved branch is connected to the main liquid extraction pipeline, and the other end is connected to an external expansion pipeline through the reserved interface 9. The reserved valve 8 controls the opening and closing state of the branch, forming a backup channel independent of the existing liquid extraction branch. The parallel layout achieves plug-and-play expansion capability.

[0035] In another specific embodiment, the suction assembly 11 includes a box body 111 with an opening at the bottom and a water inlet 401 on the side. A positioning tube 112 is provided inside the box body 111, with the bottom of the positioning tube 112 located inside the box body 111 and the top of the positioning tube 112 detachably connected to the liquid suction pipe. The first liquid level sensor 113 is a probe type, with the probe of the first liquid level sensor 113 located inside the box body 111. The bottom opening of the housing 111 and the side inlet 401 form a multi-directional liquid accumulation channel. The bottom opening can directly contact the top cover floor to collect a thin layer of accumulated water, while the side inlet 401 is suitable for splashing scenarios. The bottom of the positioning tube 112 inside the housing 111 is fixed to the center of the housing 111, and the top is detachably connected to the liquid extraction pipe via a quick-connect interface 17, ensuring the stability and maintainability of the liquid extraction path. The probe of the probe-type first liquid level sensor 113 is vertically arranged inside the housing 111, which can accurately detect millimeter-level liquid level changes. Furthermore, the top of the positioning tube 112 has an internal thread interface, which is also equipped with a quick-connect connector, allowing for convenient and quick connection or disconnection of the liquid extraction pipe for easy cleaning and maintenance. The bottom of the tube is a horizontally placed pipe opening, with the lower end face of the pipe opening parallel to the top cover floor of the turbine unit. The lower end of the pipe is approximately 5mm higher than the turbine roof floor. During pumping, it can completely remove wastewater from accumulation points, preventing prolonged liquid buildup on the turbine roof and thus protecting the working environment. This function solves the problem of conventional wastewater collection devices not being able to completely drain the wastewater, making it particularly suitable for turbine roof applications. The suction component 11, housing 111, is a cubic box measuring 100mm x 100mm x 100mm, which can be directly installed on the turbine roof floor. Its small size allows for both monitoring and pumping of accumulated water without obstructing passage and maintenance in the turbine roof area, effectively avoiding the large space requirements of conventional wastewater collection devices.

[0036] In another specific implementation, a filter screen 114 is provided on the inner side of the inlet 401. Small particulate pollutants such as dust and waste oil can pass through the filter screen 114 and enter the interior, where they are then extracted and discharged. Larger impurities are intercepted by the filter screen 114, preventing pipe blockage and further protecting the long-term stable operation of the wastewater collection device. The filter screen 114 is fixed to the inner side of the inlet 401 using screws.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. The present utility model extends to any new features or combinations disclosed in this specification, and any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model. It is obvious to those skilled in the art that the present utility model is not limited to the details of the above exemplary embodiments, and that detailed technical features not disclosed in this embodiment, such as specific structures, are all prior art and can be obtained by those skilled in the art from the prior art; the connection method can be a fixed connection, a detachable connection, or an integral part; it can be a fixed connection, a movable connection, or a hinged connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific manner of the above terms in the embodiments of the present utility model according to the specific circumstances, and the present disclosure does not specifically limit this aspect.

Claims

1. A wastewater collection device for the top cover of a water turbine unit, characterized in that: It includes a negative pressure assembly and at least one suction assembly (11) connected to each other. The negative pressure assembly is connected to the suction assembly (11) through a liquid suction pipe. The liquid suction pipe is provided with a liquid suction control assembly. The suction assembly (11) is provided with a first liquid level sensor (113). The negative pressure assembly is also connected to a drain assembly.

2. The turbine generator top cover wastewater collection device as described in claim 1, characterized in that: The negative pressure assembly includes a buffer tank (1), a circulation pump (2) connected inside the buffer tank (1), a vacuum valve (3) connected to the outlet of the circulation pump (2), a vacuum generator (4) connected to the outlet of the vacuum valve (3), and the outlet of the vacuum generator (4) connected to the buffer tank (1). The vacuum generator (4) includes an inlet (401), an outlet (402), and a suction port (403). The inlet (401) is connected to the vacuum valve (3), the outlet (402) is connected to the buffer tank (1), and the suction port (403) is connected to the suction assembly (11) through a liquid extraction control assembly.

3. The turbine generator top cover wastewater collection device as described in claim 2, characterized in that: The drainage assembly includes a drainage branch located between the circulation pump (2) and the vacuum valve (3), and a drainage valve (14) and a drainage port (15) are sequentially provided along the flow direction on the drainage branch.

4. The turbine generator top cover wastewater collection device as described in claim 3, characterized in that: A pressure gauge (13) is installed at the branch of the drainage branch.

5. The turbine generator top cover wastewater collection device as described in claim 2, characterized in that: The drainage assembly includes a bottom drain valve (16) located at the bottom of the buffer tank (1).

6. The turbine generator top cover wastewater collection device as described in claim 2, characterized in that: The bottom of the buffer tank (1) is equipped with a second liquid level sensor (12).

7. The turbine generator top cover wastewater collection device as described in claim 1, characterized in that: The liquid extraction control assembly includes a quick-connect interface (17), a liquid extraction valve (7), a maintenance valve (6), and a vacuum gauge (5) arranged sequentially along the flow direction; the liquid extraction pipeline includes at least one liquid extraction branch for connecting to the suction assembly (11), the liquid extraction branches are connected in parallel and converge into the main liquid extraction pipeline and then connected to the negative pressure assembly, the quick-connect interface (17) and the liquid extraction valve (7) are respectively provided on each liquid extraction branch, and the maintenance valve (6) and the vacuum gauge (5) are provided on the main liquid extraction pipeline.

8. The turbine generator top cover wastewater collection device as described in claim 7, characterized in that: The liquid extraction pipeline also includes a reserved branch, which is connected in parallel with the liquid extraction branch. The reserved branch is provided with a reserved interface (9) and a reserved valve (8) in sequence along the flow direction.

9. The turbine generator top cover wastewater collection device as described in claim 1, characterized in that: The suction assembly (11) includes a box (111) with an opening at the bottom and a water inlet (401) on the side. A positioning tube (112) is provided inside the box (111), with the bottom of the positioning tube (112) located inside the box (111) and the top of the positioning tube (112) detachably connected to the liquid suction pipe. The first liquid level sensor (113) is a probe type, with the probe of the first liquid level sensor (113) located inside the box (111).

10. The turbine generator top cover wastewater collection device as described in claim 9, characterized in that: A filter screen (114) is provided on the inner side of the water inlet (401).

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