Living water supply system for auxiliary workshop of hydropower station

Abstract

The utility model provides a living water supply system for an auxiliary plant of a hydropower station. The living water supply system comprises a pressure steel pipe, a living water supply main pipe, a main pipe valve and instrument group, a coarse filter, a living water supply branch pipe, a small water treatment combined device, a low-water-quality-requirement water sanitary appliance, a high-water-quality-requirement water sanitary appliance and a pressure increasing and reducing unit. Wherein the living water supply branch pipes comprise a first living water supply branch pipe and a second living water supply branch pipe. According to the living water supply system for the auxiliary plant of the hydropower station, the existing water source water pressure resource of the hydropower station can be well utilized, and the living water supply system which is simple, high in flexibility, convenient to operate, maintain and manage, low in investment cost and suitable for the auxiliary plant of the hydropower station can be designed, so that the actual use requirement in engineering is met.

Description

Technical Field

[0001] This utility model belongs to the technical field of building domestic water supply and drainage systems, specifically relating to a domestic water supply system for a hydropower station auxiliary powerhouse. Background Technology

[0002] Hydropower stations are mostly built in mountainous areas far from cities. The auxiliary powerhouse of a hydropower station houses a duty room and corresponding restrooms; therefore, the design of a domestic water supply and drainage system is essential for the auxiliary powerhouse. In hydropower station construction, the conventional design for a domestic water supply and drainage system is as follows: a water tank room is set up on the roof of the auxiliary powerhouse, containing a domestic water tank as the source of domestic water for the auxiliary powerhouse; a centralized water treatment equipment room is set up on one floor of the auxiliary powerhouse, housing a large and complex water treatment system, equipped with one pump (sometimes two pumps are used for safety and reliability, one for operation and one for backup) to pump water from the river into the water treatment equipment; a makeup pump is also installed to pump the treated water into the domestic water tank. While such a system can meet the domestic water needs of the hydropower station's auxiliary powerhouses, the entire system is relatively complex, requires high investment, and has poor flexibility, making operation and maintenance inconvenient. Hydropower stations are mostly built in mountainous areas, and in some projects, the auxiliary powerhouses of the switch stations and the plant area are located close to each other. However, due to the elevation differences in the mountains, it is difficult to use the same system to meet the water pressure requirements of domestic water in each area of ​​the auxiliary powerhouses. Therefore, it is necessary to set up domestic water tanks in different areas or to set up domestic water tanks in auxiliary powerhouses at higher locations, and to set up a pressure reducing facility in front of the domestic water fixtures in auxiliary powerhouses at lower locations, which makes the entire system more complex. In some hydropower station auxiliary powerhouses, the high-level water tanks set up separately are insufficient to meet the domestic water pressure requirements, and a variable frequency constant pressure water supply equipment is also required to maintain the pressure requirements of the entire domestic water supply system.

[0003] Therefore, it is necessary to design a method for the domestic water supply system of the auxiliary powerhouse of a hydropower station that can utilize the existing water source and pressure resources of the hydropower station, make the whole system simple, flexible, convenient for operation and maintenance, and reduce investment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a domestic water supply system for a hydropower station's auxiliary powerhouse. This system not only makes good use of the existing water source and pressure resources of the hydropower station, but also designs a simple, flexible, convenient, and cost-effective domestic water supply system suitable for hydropower station auxiliary powerhouses, thereby meeting the actual needs of the project.

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

[0006] This utility model provides a domestic water supply system for a hydropower station auxiliary powerhouse, including a pressure steel pipe (1), a domestic water supply main pipe (2), a main pipe valve and instrument group (3), a coarse filter (4), domestic water supply branch pipes (5), a small water treatment combination device (7), water-use fixtures with low water quality requirements (8), water-use fixtures with high water quality requirements (9), and a pressure boosting and stabilizing unit; wherein, the domestic water supply branch pipes (5) include a first domestic water supply branch pipe (5.1) and a second domestic water supply branch pipe (5.2);

[0007] The pressure steel pipe (1) is reserved with a domestic water intake port, and the inlet end of the domestic water supply main pipe (2) is connected to the domestic water intake port; the main pipe valve and instrument group (3), the coarse filter (4) and the pressure boosting and stabilizing unit are installed on the domestic water supply main pipe (2); the outlet end of the domestic water supply main pipe (2) is connected to the inlet end of the first domestic water supply branch pipe (5.1) and the second domestic water supply branch pipe (5.2); the end of the first domestic water supply branch pipe (5.1) is connected to the low water quality requirement water fixture (8); the small water treatment combination device (7) is installed in the second domestic water supply branch pipe (5.2), and the end of the second domestic water supply branch pipe (5.2) is connected to the high water quality requirement water fixture (9).

[0008] Preferably, the pressure steel pipe (1) is a pressurized water source and is located in the main powerhouse of the power station.

[0009] Preferably, the main pipe valve and instrument group (3) includes a first gate valve (3.1), a first pressure gauge (3.2), a check valve (3.3), a second pressure gauge (3.4), and a second gate valve (3.5) arranged sequentially in the domestic water supply main pipe (2).

[0010] Preferably, the coarse filter (4) and the pressure boosting and stabilizing unit are arranged sequentially between the first pressure gauge (3.2) and the check valve (3.3).

[0011] Preferably, the pressure boosting and stabilizing unit is a pressure reducing and stabilizing device (10), or a pressure boosting and stabilizing device (11), or a combination of a pressure reducing and stabilizing device (10) and a pressure boosting and stabilizing device (11).

[0012] Preferably, it also includes a shut-off valve (6); the shut-off valve (6) includes a first shut-off valve (6.1), a second shut-off valve (6.2), and a third shut-off valve (6.3);

[0013] The first shut-off valve (6.1) is connected to the front end of the first domestic water supply branch pipe (5.1);

[0014] The second shut-off valve (6.2) and the third shut-off valve (6.3) are connected to the second domestic water supply branch pipe (5.2) and are located at the inlet and outlet of the small water treatment combination device (7), respectively.

[0015] Preferably, the small water treatment combination device (7) includes a high-efficiency filter (7.1), a water purifier (7.2) and an intelligent water quality detection device (7.3) arranged sequentially in the second domestic water supply branch pipe (5.2).

[0016] Preferably, the high-efficiency filter (7.1), the water purifier (7.2), and the intelligent water quality testing device (7.3) are all connected by a threaded connection that allows for easy disassembly.

[0017] Preferably, the low-water-quality-requirement sanitary ware (8) includes toilet sanitary ware (8.1) and urinal sanitary ware (8.2); the high-water-quality-requirement sanitary ware (9) includes washbasin (9.1) and mop sink (9.2).

[0018] Preferably, the small water treatment unit (7) is concealed under the countertop of the washbasin (9.1).

[0019] The domestic water supply system for a hydropower station auxiliary powerhouse provided by this utility model has the following advantages:

[0020] This utility model provides a domestic water supply system for a hydropower station auxiliary powerhouse, which can make good use of the existing water source and pressure resources of the hydropower station, and can design a simple, flexible, convenient operation and maintenance management system with low investment cost suitable for the domestic water supply system of the hydropower station auxiliary powerhouse, thereby meeting the actual use needs in the project. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the domestic water supply system of the auxiliary powerhouse of a hydropower station equipped with pressure reducing and stabilizing equipment.

[0022] Figure 2 This is a schematic diagram of the domestic water supply system of the auxiliary powerhouse of a hydropower station equipped with a pressure boosting and stabilizing device.

[0023] Figure 3 This is a schematic diagram of the domestic water supply system of the auxiliary powerhouse of a hydropower station equipped with pressure reducing and stabilizing equipment and pressure boosting and stabilizing equipment.

[0024] Figure 4 This is a logic diagram for determining the pressure and selecting equipment for the domestic water supply system of the auxiliary powerhouse of a hydropower station, which is based on this utility model.

[0025] Figure 5 This is the water treatment logic control diagram of the domestic water supply system in the auxiliary powerhouse of a hydropower station.

[0026] in:

[0027] 1-Pressure steel pipe; 2-Domestic water supply main pipe; 3-Main pipe valves and instrument groups; 4-Coarse filter; 5-Domestic water supply branch pipe; 6-Stop valve; 7-Small water treatment combination unit; 8-Water sanitary ware with low water quality requirements; 9-Water sanitary ware with high water quality requirements; 10-Pressure reducing and stabilizing equipment; 11-Pressure boosting and stabilizing equipment.

[0028] 3.1-First gate valve; 3.2-First pressure gauge; 3.3-Check valve; 3.4-Second pressure gauge; 3.5-Second gate valve; 5.1-First domestic water supply branch pipe; 5.2-Second domestic water supply branch pipe; 6.1-First shut-off valve; 6.2-Second shut-off valve; 6.3-Third shut-off valve; 7.1-High-efficiency filter; 7.2-Water purifier; 7.3-Intelligent water quality testing equipment; 8.1-Toilet water fixture; 8.2-Urinary urinal water fixture; 9.1-Wash basin; 9.2-Mop sink. Detailed Implementation

[0029] To make the technical problems solved, technical solutions, and beneficial effects 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.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] This utility model provides a domestic water supply system for a hydropower station auxiliary powerhouse, including a pressure steel pipe 1, a domestic water supply main pipe 2, a main pipe valve and instrument group 3, a coarse filter 4, domestic water supply branch pipes 5, a small water treatment combination device 7, water-use fixtures with low water quality requirements 8, water-use fixtures with high water quality requirements 9, and a pressure boosting and stabilizing unit; wherein, the domestic water supply branch pipes 5 include a first domestic water supply branch pipe 5.1 and a second domestic water supply branch pipe 5.2;

[0034] The pressure steel pipe 1 is a pressurized water source, located in the main powerhouse. A domestic water intake is reserved on the pressure steel pipe 1, and the inlet of the domestic water supply main pipe 2 is connected to the domestic water intake. A main pipe valve and instrument group 3, a coarse filter 4, and a pressure boosting and stabilizing unit are installed on the domestic water supply main pipe 2. As a specific structure, the main pipe valve and instrument group 3 includes a first gate valve 3.1, a first pressure gauge 3.2, a check valve 3.3, a second pressure gauge 3.4, and a second gate valve 3.5, arranged sequentially on the domestic water supply main pipe 2. A distance of at least 2 meters should be maintained between the first pressure gauge 3.2 and the check valve 3.3. Between the first pressure gauge 3.2 and the check valve 3.3, the coarse filter 4 and the pressure boosting and stabilizing unit are arranged sequentially. Therefore, the coarse filter 4 is connected after the first pressure gauge 3.2; the pressure boosting and stabilizing unit is connected after the coarse filter 4.

[0035] In this application, the pressure boosting and stabilizing unit can take three forms: a separate pressure boosting and stabilizing device 10, a separate pressure boosting and stabilizing device 11, or a combination of pressure boosting and stabilizing device 10 and pressure boosting and stabilizing device 11. The specific structural form of the pressure boosting and stabilizing unit is determined based on the pressure at the intake of the domestic water supply main 2 and the required pressure value for domestic water use, so that the water pressure after passing through the pressure boosting and stabilizing unit can meet the water pressure requirements at the most unfavorable point of the system. Figures 1 to 3 The figures shown are structural diagrams of three different voltage boosting and stabilizing units.

[0036] Specifically, during the system design process, refer to Figure 4The system needs to be verified through pressure calculations to determine the specific type of pressure boosting and stabilizing unit suitable for the system. For example, the minimum pressure value A and the maximum pressure value B of the water intake of the domestic water supply main 2 should be calculated in advance. The most unfavorable pipeline in the system should be selected, and the required pressure value C of the most unfavorable pipeline should be calculated based on the pressure required by the low-water-quality-requirement sanitary fixture 8 or the high-water-quality-requirement sanitary fixture 9 at the end of the most unfavorable pipeline and the pipeline resistance loss. The values ​​of A, B, and C should be compared. If A > C, a domestic water supply system with pressure reducing and stabilizing device 10 should be selected; if B < C, a domestic water supply system with pressure boosting and stabilizing device 11 should be selected; if A < C < B, a domestic water supply system with pressure reducing and stabilizing device 10 + pressure boosting and stabilizing device 11 should be selected to meet the domestic water pressure requirements.

[0037] In this application, the coarse filter 4 is installed in the domestic water supply main pipe 2 for preliminary filtration of the water source. In practical applications, the coarse filter 4 has an impurity collection device inside and an automatic detection and alarm function. The detection and alarm signal line is directly connected to the central control room where personnel are on duty. An effective liquid level is set for the impurity collection device, and an alarm signal is sent to the central control room when the effective liquid level is reached. The installation height of the coarse filter 4 is between 1m and 1.2m.

[0038] In this application, the first pressure gauge 3.2 and the second pressure gauge 3.4 are pressure gauges with different ranges. The range of the first pressure gauge 3.2 is determined according to the pressure change range of the pressure steel pipe 1, and the second pressure gauge 3.4 is determined according to the pressure value of the most unfavorable pipeline and the set pressure value after passing through the pressure reducing and stabilizing device 10 or the pressure boosting and stabilizing device 11.

[0039] After passing through the second gate valve 3.5, the domestic water supply main pipe 2 is connected to the domestic water supply branch pipe 5; the domestic water supply branch pipe 5 includes the first domestic water supply branch pipe 5.1 and the second domestic water supply branch pipe 5.2; of course, the domestic water supply branch pipe 5 can form multiple water supply branch pipes including the first domestic water supply branch pipe 5.1 and the second domestic water supply branch pipe 5.2 to meet multiple water supply needs.

[0040] In this application, the outlet of the domestic water supply main pipe 2 is connected to the inlet of the first domestic water supply branch pipe 5.1 and the second domestic water supply branch pipe 5.2, respectively. The end of the first domestic water supply branch pipe 5.1 is connected to a low-water-quality-requirement sanitary ware 8, which includes a toilet sanitary ware 8.1 and a urinal sanitary ware 8.2. The type, quantity, and connection order of the toilet sanitary ware 8.1 and the urinal sanitary ware 8.2 can be flexibly adjusted according to actual usage needs. A small water treatment combination device 7 is installed in the second domestic water supply branch pipe 5.2. The end of the second domestic water supply branch pipe 5.2 is connected to a high-water-quality-requirement sanitary ware 9, which includes a washbasin 9.1 and a mop sink 9.2. The type, quantity, and connection order of the washbasin 9.1 and the mop sink 9.2 can be flexibly adjusted according to actual usage needs.

[0041] In this application, the small water treatment combination device 7 includes a high-efficiency filter 7.1, a water purifier 7.2, and an intelligent water quality testing device 7.3 arranged sequentially in the second domestic water supply branch pipe 5.2; the high-efficiency filter 7.1, the water purifier 7.2, and the intelligent water quality testing device 7.3 are all connected by a threaded connection that can be easily disassembled; the small water treatment combination device 7 can be directly hidden under the countertop of the washbasin 9.1.

[0042] The detection alarm signal line of the intelligent water quality testing equipment 7.3 is directly connected to the central control room where personnel are on duty. The water quality testing requirement value is preset for the intelligent water quality testing equipment 7.3. If it is greater than or equal to the value, it is determined that the water quality requirement is met and it can be directly used for water-using sanitary ware 9 with high water quality requirements; if it is lower than the value, it is determined that the water quality requirement is not met and an alarm signal is sent to the central control room.

[0043] The domestic water supply system for the auxiliary powerhouse of this utility model determines the pressure values ​​of the pressure steel pipe and the intake of the domestic water supply main through pressure calculation. This value is then compared with the pressure value required for the entire pipeline system by the most unfavorable water-using fixture to determine whether to select a pressure-reducing or pressure-boosting device. Main pipe valves and instrument groups, coarse filters, shut-off valves, small water treatment units, low-water-quality fixtures, high-water-quality fixtures, pressure-reducing and pressure-boosting devices are all connected through the domestic water supply main or branch pipes. Alarm information from the coarse filters and small water treatment units is directly fed back to the central control room, forming the water treatment logic control for the entire system.

[0044] This utility model provides a domestic water supply system for a hydropower station auxiliary powerhouse, which can make good use of the existing water source and pressure resources of the hydropower station, and can design a simple, flexible, convenient operation and maintenance management system with low investment cost suitable for the domestic water supply system of the hydropower station auxiliary powerhouse, thereby meeting the actual use needs in the project.

[0045] Two examples are described below:

[0046] Example 1:

[0047] refer to Figures 1 to 5 This utility model provides a domestic water supply system for a hydropower station auxiliary powerhouse, which involves the determination of pressure and equipment selection for the domestic water supply system of the hydropower station auxiliary powerhouse, as well as the connection of pipelines and equipment for the domestic water supply system of the hydropower station auxiliary powerhouse.

[0048] In the design of the domestic water supply system for the auxiliary powerhouse of the hydropower station, it is first necessary to calculate the pressure range of the pressure steel pipe based on the actual range of reservoir water level changes and the resistance loss between the reservoir intake and the pressure steel pipe, and to determine the minimum pressure value A and the maximum pressure value B of the intake of the domestic water supply main pipe 2. Then, the most unfavorable pipeline in the system is selected, and the required pressure value C of the most unfavorable pipeline is calculated based on the pressure required by the low-water-quality-requirement sanitary fixture 8 or the high-water-quality-requirement sanitary fixture 9 at the end of the most unfavorable pipeline and the pipeline resistance loss. The values ​​A, B, and C are compared. If A > C, a domestic water supply system with pressure reducing and stabilizing equipment 10 is selected; if B < C, a domestic water supply system with pressure boosting and stabilizing equipment 11 is selected; if A < C < B, a domestic water supply system with pressure reducing and stabilizing device 10 + pressure boosting and stabilizing device 11 is selected.

[0049] Taking a domestic water supply system equipped with pressure reducing and stabilizing device 10 as an example, the following detailed description is provided:

[0050] Through calculation and verification, the minimum pressure value A and the maximum pressure value B at the water intake of the domestic water supply main 2 were calculated. The required pressure value C for the most unfavorable pipeline in the system was also calculated. By comparing the values ​​of A, B, and C, it was found that A > C. Therefore, a domestic water supply system with pressure reducing and stabilizing device 10 was selected. The pressure value after pressure reduction and stabilization by pressure reducing and stabilizing device 10 was set as value C.

[0051] A domestic water inlet is reserved on the pressure steel pipe 1 and connected to the domestic water supply main pipe 2. On the domestic water supply main pipe 2, the following components are connected in sequence: first gate valve 3.1, first pressure gauge 3.2, coarse filter 4, pressure reducing and stabilizing device 10, check valve 3.3, second pressure gauge 3.4, and second gate valve 3.5. After the second gate valve 3.5, the first domestic water supply branch pipe 5.1 and the second domestic water supply branch pipe 5.2 are connected to the domestic water supply main pipe 2. First, a first shut-off valve 6.1 is connected to the first domestic water supply branch pipe 5.1. Water-using fixtures are classified into low-water-quality-requirement fixtures 8 and high-water-quality-requirement fixtures 9. The low-water-quality-requirement fixtures 8 (including toilet fixtures 8.1 and urinal fixtures 8.2) in the same area are connected in sequence to the first domestic water supply branch pipe 5.1 after the first shut-off valve 6.1. First, connect the second shut-off valve 6.2 to the second domestic water supply branch pipe 5.2, then connect the small water treatment combination device 7. The connected devices are, in sequence, a high-efficiency filter 7.1, a water purifier 7.2, and an intelligent water quality testing device 7.3. Next, connect the third shut-off valve 6.3. Connect the high-quality water-requiring sanitary ware 9 (including a washbasin 9.1 and a mop sink 9.2) in the same area to the second domestic water supply branch pipe 5.2 after the third shut-off valve 6.3. The type, quantity, and connection order of the toilet water-requiring ware 8.1 and urinal water-requiring ware 8.2 can be flexibly adjusted according to actual usage needs; the type, quantity, and connection order of the washbasin 9.1 and mop sink 9.2 can also be flexibly adjusted according to actual usage needs. Connect the detection alarm signal lines on the coarse filter 4 and the intelligent water quality testing device 7.3 to the central control room where personnel are on duty.

[0052] In practical applications, if the pressure calculation is verified, the same set of domestic water supply main pipe 2 can be used in the area. However, the rooms with various water-using sanitary ware are relatively scattered. In order to facilitate unified management, the same set of domestic water supply main pipe 2 can be connected to multiple domestic water supply branch pipes 5. However, it is still necessary to ensure that each domestic water supply branch pipe 5 is connected to the same type of water-using sanitary ware, so as to facilitate on-site operation and maintenance management.

[0053] During operation, the first gate valve 3.1, the second gate valve 3.5, the first shut-off valve 6.1, the second shut-off valve 6.2, and the third shut-off valve 6.3 are all kept open. Water from the pressure steel pipe 1 flows through the domestic water supply main pipe 2 and passes through the coarse filter 4 for preliminary filtration, collecting impurities in the impurity collection device within the coarse filter 4. This impurity collection device has automatic liquid level detection and alarm functions. An effective liquid level is preset in the impurity collection device. When this effective liquid level is reached, an alarm signal is sent to the central control room, requiring manual cleaning of the impurity collection device. During cleaning, the first gate valve 3.1 and the second gate valve 3.5 must be closed. After cleaning, the first gate valve 3.1 and the second gate valve 3.5 can be opened. Under normal operating conditions of the coarse filter 4, the water treated by the coarse filter 4 can be directly used for low-water-quality-requirement sanitary ware 8. The first shut-off valve 6.1 is normally kept open. If the low-water-quality-requirement sanitary ware 8 requires maintenance or replacement, the first shut-off valve 6.1 is closed and reopened after maintenance or replacement. Under normal operating conditions, the water treated by the coarse filter 4 needs to undergo further treatment by the small water treatment combination unit 7, passing through the high-efficiency filter 7.1, the water purifier 7.2, and the intelligent water quality testing device 7.3. The intelligent water quality testing device 7.3 is pre-set with water quality testing requirements. Values ​​greater than or equal to these values ​​are considered to meet the water quality requirements and can be directly used with high-quality water fixtures 9. Values ​​lower than these values ​​are considered to fail to meet the water quality requirements, and an alarm signal is sent to the central control room. Personnel in the central control room then inspect and replace the equipment with backup equipment, including the high-efficiency filter 7.1 and the water purifier 7.2. The disassembled high-efficiency filter 7.1 and water purifier 7.2 are cleaned and maintained until they meet usage standards, then stored in the warehouse as new backup equipment. The second shut-off valve 6.2 and the third shut-off valve 6.3 are normally kept open. During the replacement of the high-efficiency filter 7.1 and the water purifier 7.2, the second shut-off valve 6.2 and the third shut-off valve 6.3 must be closed and reopened after the replacement is completed. The first pressure gauge 3.2 and the second pressure gauge 3.4 are used to determine the working status of the pressure reducing and stabilizing device 10. If the reading of the first pressure gauge 3.2 or the second pressure gauge 3.4 is found to be abnormal, the first gate valve 3.1 and the second gate valve 3.5 can be closed. First, check whether the first pressure gauge 3.2 or the second pressure gauge 3.4 is damaged. At the same time, check whether the pressure reducing and stabilizing device 10 is faulty. After the problem is identified, the first gate valve 3.1 and the second gate valve 3.5 can be opened.

[0054] Example 2:

[0055] The following example, using a large-scale hydropower station project that adopted the technical solution of this utility model, further illustrates the concept with reference to the accompanying drawings:

[0056] In a large-scale hydropower station project under construction, the water pressure in the pressure steel pipe is relatively high, and the water source is relatively abundant. There are no spare rooms in the auxiliary powerhouse suitable for installing centralized water treatment equipment, and the pipeline laying from the location of the pressure steel pipe to the water fixtures in the auxiliary powerhouse is inconvenient. It is necessary to design a domestic water supply system for the auxiliary powerhouse of this hydropower station project that can effectively utilize the existing water source and pressure resources of the hydropower station, while also being simple, flexible, easy to operate and maintain, and with low investment costs. Therefore, the domestic water supply system for the auxiliary powerhouse of the hydropower station mentioned in this utility model was adopted.

[0057] Calculations show that the minimum pressure value A of the pressure steel pipe 1 in this project is 2.90 MPa, and the maximum pressure value B is 2.95 MPa. The pressure value C required for the most unfavorable pipeline in the domestic water supply system is 0.5 MPa. Since A > C, a domestic water supply system with a pressure reducing and stabilizing device 10 was selected. The pressure value after processing by the pressure reducing and stabilizing device 10 is set to 0.5 MPa. The measuring range of the first pressure gauge 3.2 is 0–4.0 MPa, and the measuring range of the second pressure gauge 3.4 is 0–1.0 MPa.

[0058] The intake of the domestic water supply main pipe 2 is located on the pressure steel pipe 1 in the spiral shell layer of the main powerhouse. The first gate valve 3.1, the first pressure gauge 3.2, the coarse filter 4, the pressure reducing and stabilizing device 10, the check valve 3.3, the second pressure gauge 3.4, and the second gate valve 3.5 are connected sequentially to the domestic water supply main pipe 2. All of these devices are located in the spiral shell layer of the main powerhouse, at a height of 1.2m above the ground of this layer, for easy operation and maintenance by personnel.

[0059] A rest room is located on the left side of the first floor of the auxiliary plant. According to the requirements of the construction unit, it is equipped with a handwashing basin 9.1 and a mop sink 9.2. On the right side of the first floor of the auxiliary plant, a men's restroom and a women's restroom are located respectively. The men's restroom is equipped with two toilets with water-saving fixtures 8.1 and two urinals with water-saving fixtures 8.2. The men's restroom anteroom is equipped with two handwashing basins 9.1 and a mop sink 9.2. The women's restroom is equipped with two toilets with water-saving fixtures 8.1. The women's restroom anteroom is equipped with two handwashing basins 9.1.

[0060] To facilitate on-site operation and maintenance, a second domestic water supply branch pipe 5.2 was installed in the rest room, and a small water treatment combination device 7 was installed under the washbasin in the rest room. The connected devices are, in sequence, a high-efficiency filter 7.1, a water purifier 7.2, and a smart water quality testing device 7.3, and then connected to the washbasin 9.1 and mop sink 9.2 in this room. A second domestic water supply branch pipe 5.2 was installed in the anterooms of both the men's and women's restrooms, and a small water treatment combination device 7 was installed under the washbasin in each of the anterooms. The connected devices are, in sequence, a high-efficiency filter 7.1, a water purifier 7.2, and a smart water quality testing device 7.3, and then connected to the washbasin 9.1 or mop sink 9.2 in each anteroom. The two toilets 8.1 and two urinals 8.2 in the men's restroom and the two toilets 8.1 in the women's restroom are connected to the same first domestic water supply branch pipe 5.1, and the various sanitary fixtures are connected through the pipeline.

[0061] The central control room is located in the auxiliary plant building and is staffed at all times. The detection alarm signal lines from the coarse filter 4 and the intelligent water quality testing equipment 7.3 are connected to the alarm control device in the central control room. Two different alarm signals are set up. If an alarm occurs, the signal type can be used to determine which part of the equipment needs to be replaced or maintained.

[0062] The domestic water supply system for a hydropower station auxiliary powerhouse provided by this utility model has the following advantages:

[0063] This utility model provides a domestic water supply system for a hydropower station auxiliary powerhouse, which can make good use of the existing water source and pressure resources of the hydropower station, and can design a simple, flexible, convenient operation and maintenance management system with low investment cost suitable for the domestic water supply system of the hydropower station auxiliary powerhouse, thereby meeting the actual use needs in the project.

[0064] This utility model provides a domestic water supply system for a hydropower station's auxiliary powerhouse. It allows for pressure calculations during the system design phase before construction, enabling the selection of suitable equipment. Furthermore, it allows for flexible addition of water supply points during construction based on the needs of construction and maintenance personnel. If a new water supply area is added, the compatibility of the original system can be assessed through pressure calculations, or suitable pressure-reducing and stabilizing devices or variable frequency constant pressure water supply equipment can be added to meet the needs of the new area.

[0065] This utility model provides a domestic water supply system for a hydropower station auxiliary plant. The water-using fixtures are pre-classified, and the water after coarse filtration can be directly used for water-using fixtures with low water quality requirements. The water for water-using fixtures with high water quality requirements still needs to undergo high-efficiency filtration and water treatment after coarse filtration. This achieves the functional effect of meeting the needs of each water-using point and making reasonable use of water treatment equipment resources.

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A life water supply system for a power plant auxiliary building, characterized by, The utility model provides a kind of water supply system for power plant, including pressure steel pipe (1), domestic water supply main pipe (2), main pipe valve and instrument group (3), coarse filter (4), domestic water supply branch pipe (5), small water treatment combined device (7), low water quality requirement water sanitary fixture (8), high water quality requirement water sanitary fixture (9) and pressure increasing and reducing pressure stabilizing unit;Wherein, the domestic water supply branch pipe (5) includes first domestic water supply branch pipe (5.1) and second domestic water supply branch pipe (5.2); The pressure steel pipe (1) is reserved domestic water intake, and the water inlet end of the domestic water supply main pipe (2) is communicated with the domestic water intake;The main pipe valve and instrument group (3), the coarse filter (4) and the pressure increasing and reducing pressure stabilizing unit are arranged on the domestic water supply main pipe (2);The water outlet end of the domestic water supply main pipe (2) is communicated with the water inlet end of the first domestic water supply branch pipe (5.1) and the second domestic water supply branch pipe (5.2) respectively;The end of the first domestic water supply branch pipe (5.1) is connected with the low water quality requirement water sanitary fixture (8);The small water treatment combined device (7) is installed in the second domestic water supply branch pipe (5.2), and the end of the second domestic water supply branch pipe (5.2) is connected with the high water quality requirement water sanitary fixture (9).

2. The life water supply system of a hydropower station auxiliary powerhouse according to claim 1, characterized in that, The pressure steel pipe (1) is a pressurized water source, which is arranged in the main plant of the power plant.

3. The life water supply system of a hydropower station auxiliary powerhouse according to claim 1, characterized in that, The main pipe valve and instrument group (3) includes first gate valve (3.1), first pressure gauge (3.2), check valve (3.3), second pressure gauge (3.4) and second gate valve (3.5) arranged in the domestic water supply main pipe (2) in sequence.

4. The life water supply system of a hydropower station auxiliary powerhouse according to claim 3, characterized in that, The coarse filter (4) and the pressure increasing and reducing pressure stabilizing unit are arranged in sequence between the first pressure gauge (3.2) and the check valve (3.3).

5. The life water supply system of a hydropower station auxiliary powerhouse according to claim 1, characterized in that, The pressure increasing and reducing pressure stabilizing unit is a pressure reducing and stabilizing device (10), or a pressure increasing and stabilizing device (11), or a combination of the pressure reducing and stabilizing device (10) and the pressure increasing and stabilizing device (11).

6. The life water supply system of a hydropower station auxiliary powerhouse according to claim 1, characterized in that, It also includes a stop valve (6), and the stop valve (6) includes a first stop valve (6.1), a second stop valve (6.2) and a third stop valve (6.3). The first stop valve (6.1) is connected to the front end of the first domestic water supply branch pipe (5.1). The second stop valve (6.2) and the third stop valve (6.3) are connected to the second domestic water supply branch pipe (5.2) and are located at the water inlet end and the water outlet end of the small water treatment combined device (7) respectively.

7. The life water supply system of a hydropower station auxiliary powerhouse according to claim 1, characterized in that, The small water treatment combined device (7) includes high-efficiency filter (7.1), water purifier (7.2) and intelligent water quality detection device (7.3) arranged in the second domestic water supply branch pipe (5.2) in sequence.

8. The life water supply system of a hydropower station auxiliary powerhouse according to claim 7, characterized in that, Threaded connection mode that can be easily disassembled is adopted between the high-efficiency filter (7.1), the water purifier (7.2) and the intelligent water quality detection device (7.3).

9. The life water supply system of a hydropower station auxiliary powerhouse according to claim 1, characterized in that, The low water quality requirement water sanitary fixture (8) includes a toilet water sanitary fixture (8.1) and a urinal water sanitary fixture (8.2), and the high water quality requirement water sanitary fixture (9) includes a wash basin (9.1) and a mop pool (9.2).

10. The life water supply system of a hydropower station auxiliary powerhouse according to claim 9, characterized in that, The small water treatment combined device (7) is hidden and placed under the table top of the hand washing basin (9.1).

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