Automatic water resource collection and utilization system for construction site

Abstract

The utility model discloses a construction site water resource automatic collection and utilization system which comprises a foundation pit rainfall and rainwater collection system and a water resource automatic collection and utilization system, the foundation pit rainfall and rainwater collection system collects and precipitates foundation pit rainfall, and the water resource automatic collection and utilization system conveys and utilizes the precipitated rainfall. And the precipitation amount is supplemented through municipal water. The collection and utilization system fully considers fire-fighting water when a fire occurs, is high in safety, recycles water pumped from a rainfall station and rainwater, saves a large amount of water resources, is obvious in economic benefit, has complete functions of a water inlet and outlet control and monitoring system, can meet temporary water system control of most project departments, is convenient to disassemble and assemble and can be repeatedly used, and is convenient to popularize and use. The intelligent construction site management system has the advantages that the concept of an intelligent construction site is implemented, automatic collection of foundation pit dewatering and rainwater and full-automatic control of a water tank water inlet system and a constant-pressure water supply system are achieved, the informatization level of construction site management is improved, and the system is high in practicability and can be used for site construction.

Description

Technical Field

[0001] This application relates to the field of water resource utilization technology at construction sites, and in particular to an automatic water resource collection and utilization system for construction sites. Background Technology

[0002] As a vital sector of the national economy, the construction industry consumes significant amounts of water during construction processes, including concrete curing, dust control, vehicle washing, and toilet cleaning. Furthermore, to prevent fires at construction sites, reduce fire hazards, and protect personal and property safety, temporary fire-fighting water supply systems are required. These systems necessitate water storage tanks and fire pipelines. However, the inefficient use of water resources at construction sites leads to substantial waste. For instance, concrete curing and dust control require substantial amounts of water, yet these processes themselves result in water waste. Additionally, rainwater is not effectively utilized in the construction site's water environment. Therefore, the utilization rate of water resources at construction sites needs to be improved. Summary of the Invention

[0003] To address the aforementioned problems, this application aims to provide an automatic water resource collection and utilization system for construction sites. This system can effectively recycle and reuse water pumped from foundation pit dewatering and rainwater to meet the water needs of construction sites, thus promoting water conservation and environmental protection. Furthermore, it can be linked with municipal water supply pipelines for control, ensuring sufficient fire-fighting water supply in the event of a fire.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: an automatic water resource collection and utilization system for construction sites, the system comprising:

[0005] The foundation pit dewatering and rainwater collection system collects and settles the foundation pit rainwater;

[0006] The automatic water collection and utilization system transports and utilizes the settled precipitation, and supplements the precipitation with municipal water supply.

[0007] The foundation pit dewatering and rainwater collection system also includes a filtration mechanism for collecting rainwater from the foundation pit.

[0008] Preferably, the foundation pit dewatering and rainwater collection system includes an annular rainwater ditch excavated in the foundation pit and rainwater collection pits excavated at intervals in the annular rainwater ditch. The filtration mechanism is located on the side of the annular rainwater ditch and is higher than the annular rainwater ditch.

[0009] Preferably, the filtration mechanism is a filter screen vertically installed in the foundation on both sides of the pit.

[0010] Preferably, a filter trough, which is integrally formed into a U-shaped structure and embedded in the annular rainwater ditch, is connected between the filter screens on both sides of the foundation pit.

[0011] Preferably, the filter tank has a segmented splicing structure, with shoulders and stepped grooves sequentially provided in the front and rear sections of a single filter tank segment.

[0012] The beneficial effects of this application are:

[0013] (1) This system fully considers fire-fighting water use in the event of a fire, and is highly safe.

[0014] (2) This system reuses the water pumped from the precipitation and rainwater, saving a lot of water resources and achieving significant economic benefits.

[0015] (3) The water inlet and outlet control and monitoring system in this system is fully functional and can meet the temporary water use control needs of most project departments. The PLC control cabinet is easy to disassemble and reuse.

[0016] (4) This system implements the concept of smart construction site, realizes automatic collection of foundation pit dewatering and rainwater, and fully automatic control of water tank inlet system and constant pressure water supply system, thereby improving the informatization level of construction site management.

[0017] (5) This system is highly practical and can be used for on-site construction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the automatic water resource collection and utilization system of this application.

[0019] Figure 2 This is a diagram of the foundation pit dewatering and rainwater collection system for this application.

[0020] Figure 3 This is a schematic diagram of the automatic water resource collection and utilization system of this application.

[0021] Figure 4 This is a plan view of the annular rainwater ditch and rainwater collection pit excavated within the foundation pit of this application.

[0022] Figure 5 This diagram illustrates the flow direction of precipitation within the foundation pit of this application.

[0023] Figure 6 The illustration shows how the geological forces drive the rainwater flow within the foundation pit to the annular rainwater ditch and rainwater collection pit.

[0024] Figure 7 This illustration shows the installation of a filter screen on the side of the foundation pit for this application.

[0025] Figure 8 For this application Figure 7 Front view.

[0026] Figure 9 This illustration shows the filter screen tilting under the impact of rainfall, as described in this application.

[0027] Figure 10 The illustration shows a U-shaped filter channel for this application and its embedded assembly into a ring-shaped rainwater ditch.

[0028] Figure 11 This is a diagram illustrating the assembly of the filter tank in this application.

[0029] Figure 12 This application shows a corrugated plate structure in the middle of a single-section filter tank.

[0030] Figure 13 This is a diagram illustrating the extension of a single-section filter tank in this application.

[0031] In the diagram: 1-circular rainwater ditch; 2-rainwater collection pit; 31-filter screen; 3-filter tank; 3a-shoulder; 3b-step groove; 32-corrugated plate. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] See attached document Figures 1-13 An automatic water collection and utilization system for construction sites is shown, the system comprising:

[0034] The foundation pit dewatering and rainwater harvesting system collects and settles the rainwater from the foundation pit. This system includes a piping system and an electrical control system, such as... Figure 1 As shown, the pipeline system includes components such as rainwater wells, rainwater collection pits 2, sedimentation tanks, water tanks, water pumps, galvanized steel pipes, valves, and pressure gauges (some components are not shown in the figure).

[0035] (1) Based on the actual situation of the project, the dewatering wells around the foundation pit are constructed, and then the dewatering pumps are installed at the bottom of the wells. Check valves are installed at the bottom of the dewatering branch pipes of each dewatering pump, located below the lowest water level of the well pumping, to prevent water source backflow from damaging the pumps. The dewatering water is discharged into the dewatering and rainwater collection pipes through the dewatering branch pipes, and finally discharged into the sedimentation tank.

[0036] (2) Based on the actual situation of the project, a ring-shaped rainwater ditch 1 and a rainwater collection pit 2 are set at the bottom of the foundation pit to ensure that the slope of the rainwater ditch is about 0.3% to ensure smooth drainage. A drainage pump is installed in the rainwater collection pit 2, and the rainwater is discharged into the precipitation and rainwater collection pipe through the drainage pipe, and finally discharged into the sedimentation tank.

[0037] The electrical control system includes components such as a smart pump controller, solenoid valves, level detection devices, pressure detection devices, flow monitoring devices, and a PLC control cabinet. The smart pump controller (4G level float remote control switch) controls the drainage pumps in the rainwater collection pit 2 and the rainwater well. It can automatically start and stop the drainage pumps based on changes in the liquid level. Remote control via a computer webpage and mobile app is also possible. Real-time alarms are triggered in case of power outages, excessively high water levels, or water shortages, achieving fully automatic control and fault alarms for the drainage pumps. This high level of intelligence saves on labor costs.

[0038] An automated water resource collection and utilization system transports and utilizes settled rainwater, and supplements the rainfall with municipal water. It includes an inlet pipeline system, an outlet pipeline system, and an automatic control and monitoring system. The inlet pipeline system uses submersible pumps to transport water collected in the sedimentation tank to a domestic / fire-fighting water tank. The flow rate of the submersible pumps should be greater than the water consumption for fire hydrants (L / s). Smart remote water meters are installed on the submersible pump supply pipeline. Solenoid valves are installed on the municipal water supply pipeline; when the water pumped from the rainwater cannot meet the on-site water demand, the municipal water supply tank is activated to supply water, and smart remote water meters are also installed on the municipal water supply pipeline.

[0039] The water supply system includes a domestic and fire pump room set up on-site, equipped with a constant pressure water supply system. The flow rate of the constant pressure water supply system should be greater than the water consumption for fire hydrants (L / s). Water in the tank is pressurized by a variable frequency centrifugal pump and then transported through the outlet pipeline to various locations on the construction site for use in concrete curing, dust control, vehicle washing, toilet cleaning, and other domestic and production water needs, as well as for fire pump connections and indoor and outdoor fire hydrants. Intelligent remote water meters are installed on the outlet pipeline.

[0040] This technical solution establishes a constant pressure water supply system based on the fire-fighting water demand during a fire. The required outflow rate should exceed the hydrant water demand (L / s) during a fire. Based on a hydrant water demand of 15 L / s, the booster pump flow rate should be greater than 54 m³ / h. Adhering to the principle of combining primary and backup pumps, at least two variable frequency centrifugal pumps should be installed. Considering the unpredictable nature of fire-fighting water demand, and that most situations at the construction site involve only production and domestic water use, the specifications of the variable frequency centrifugal pumps can be selected according to the on-site production and domestic water demand. For example, if the on-site production and domestic water demand is typically 8 m³ / h... 3 / h, fire water supply is 54m³ 3 / h, can be set to 4 units with a flow rate of 15m 3 The variable frequency centrifugal pumps are set to operate in rotation during normal water use to reduce the failure rate. In the event of a fire, all four variable frequency centrifugal pumps will be started simultaneously to meet the fire water supply needs.

[0041] Automatic control and monitoring system: A PLC control cabinet is installed in the pump room. The automatic water inlet system and constant pressure water supply system of the water tank are centrally controlled through PLC controllers, relays, circuit breakers and related software programs, and relevant data are monitored.

[0042] (1) Water inlet control system

[0043] A submersible level transmitter is installed in the domestic and fire water tank to measure the water level in real time and transmit the signal to the fully automatic PLC control cabinet. The transmitter controls the start and stop of the submersible pump in the sedimentation tank and the opening and closing of the solenoid valve on the municipal water supply pipeline according to the four adjustable start and stop levels.

[0044] Assuming the water tank is at a height of A meters, when the water level drops to C meters, the submersible pump starts; when the water level reaches B meters, the submersible pump stops. When the submersible pump starts filling the tank, but the on-site water demand is exceptionally high and the water pumped from the sedimentation tank cannot meet the demand, the water level in the tank will continue to drop. When the water level drops to E meters, the solenoid valve of the municipal water supply opens, and water begins to flow into the tank. When the water level reaches D meters, the solenoid valve closes, and the water supply stops flowing in. When the water level reaches B meters, the submersible pump stops. (A>B>C>D>E)

[0045] (2) Water discharge control system

[0046] An electric pressure gauge is installed on the outlet water pipe. This device can transmit the outlet water pipe pressure data to the fully automatic PLC control cabinet in real time. The variable frequency constant pressure water supply system uses the outlet water pipe pressure as the set parameter. Through microcomputer control of the inverter's output frequency, it automatically adjusts the speed of the variable frequency centrifugal pump motor, realizing closed-loop regulation (PID) of the water pressure in the pipe network. This ensures that the water supply system automatically maintains a constant pressure value: when water consumption increases, the pump power frequency is increased, the pump speed increases, and the water supply increases accordingly, thus ensuring that the water pressure remains constant. When water consumption decreases, the pump power frequency is decreased, the pump speed decreases, and the water supply decreases accordingly, thus ensuring that the water pressure remains constant.

[0047] (3) Data monitoring system

[0048] A central control screen is installed on the door of the PLC control cabinet, which can adjust relevant equipment parameters and view the equipment operating status, including the following display (not shown in this application):

[0049] A. The central control screen displays the start and stop liquid levels of the solenoid valves on the submersible sewage pump water supply pipe and the municipal tap water pipe in the sedimentation tank, and can be adjusted at any time;

[0050] B. The central control screen displays the real-time liquid level in the water tank;

[0051] C. The central control screen displays the operating status of the solenoid valves on the municipal water supply pipeline;

[0052] D. The central control screen displays the current and target pressure of the water pipeline, and the target pressure can be adjusted at any time;

[0053] E. The central control screen displays the total water consumption of the precipitation in the sedimentation tank, the total water consumption of the municipal power grid, and the total water consumption of the construction site;

[0054] F. The central control screen displays the operating status of the four centrifugal pumps;

[0055] G. The central control screen is equipped with a 5G SIM card, which can remotely upload relevant data to a computer.

[0056] Based on the completeness of the aforementioned collection and utilization system, during the process of collecting rainwater from the foundation pit, the rainwater flowing into the annular rainwater ditch 1 and rainwater collection pit 2 will guide the surface geology through the water flow, causing a large amount of silt to accumulate in the annular rainwater ditch 1 and rainwater collection pit 2 over a long period of time, affecting the collection and utilization of rainwater. Therefore, to solve this problem, the foundation pit rainwater collection system also includes a filtration mechanism for collecting rainwater from the foundation pit. This filtration mechanism is located on the side of the annular rainwater ditch 1 and is higher than the annular rainwater ditch 1. It blocks the silt driven by the rainwater flow, restricting it from entering the annular rainwater ditch 1 and rainwater collection pit 2, thereby ensuring the water volume in the annular rainwater ditch 1 and rainwater collection pit 2 and solving the problem of silt loss from the foundation pit surface.

[0057] Specifically, such as Figure 7-8 As shown, the filtration mechanism is a filter screen 31 vertically installed in the foundation on both sides of the pit. Specifically, the filter screen 31 is inserted into the foundation on both sides of the annular rainwater ditch 1 and is positioned above the foundation level, thus... Figure 8 As shown by the middle arrow, when surface precipitation flows into the annular rainwater ditch 1, it is blocked and filtered by the filter screen 31, so that the sediment will not flow into the annular rainwater ditch 1 and the rainwater collection pit 2, so that the precipitation can be collected smoothly and the surface erosion will be reduced.

[0058] like Figure 9 As shown, when the water flow is too large and carries too much sediment, the ground on both sides of the annular rainwater ditch 1 will become soft due to rainwater infiltration. Therefore, the filter screen 31 inserted into the foundation may tilt, thus failing to filter and prevent sediment loss. Figure 10 As shown, a filter groove 3, forming an integral U-shaped structure, is connected between the filter screens 31 on both sides of the foundation pit and embedded in the annular rainwater ditch 1. After the annular rainwater ditch 1 is excavated, the U-shaped filter groove 3 can be directly placed into the annular rainwater ditch 1 for quick assembly. At the same time, the integral structure of the filter groove 3 can effectively avoid the problem of the filter screens 31 inserted into the foundation easily tipping over due to the soft foundation on both sides of the annular rainwater ditch 1.

[0059] Because the sizes of the different foundation pits vary, the lengths of the excavated annular rainwater ditch 1 are also inconsistent. Therefore, to facilitate the assembly of the filter tank 3, such as... Figure 11 As shown, the filter tank 3 has a segmented assembly structure, with a shoulder 3a and a stepped groove 3b sequentially provided in the front and rear sections of each segment. The assembly process of adjacent segments of the filter tank 3 is as follows: Figure 11 As shown, by inserting along the length direction, the shoulders 3a and stepped grooves 3b of adjacent filter tanks 3 are interlocked, thereby achieving the splicing of filter tanks 3, which can be adapted to the assembly of annular rainwater troughs of different lengths.

[0060] Each individual filter tank 3 has a rated length, therefore, in order to further achieve the closed assembly of the annular rainwater ditch 1, such as Figure 12 As shown, a corrugated plate 32 made of rubber is provided in the middle of one or more filter tanks 3. The corrugated plate 32 can be extended and retracted in the length direction, so as to be further adapted to the closed assembly of annular rainwater ditches 1 of different lengths.

[0061] The principle of this application is that the foundation pit dewatering and rainwater collection system filters and collects the rainwater in the foundation pit, which can be used for applications such as construction site water use and fire fighting water use. At the same time, when the amount of rainwater is insufficient, it can be supplemented by municipal water use, thereby achieving the purpose of saving energy and reducing costs.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this application. Various changes and modifications may be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. An automatic water resource collection and utilization system for construction sites, characterized in that: The collection and utilization system includes: The foundation pit dewatering and rainwater collection system collects and settles the foundation pit rainwater; The automatic water collection and utilization system transports and utilizes the settled precipitation, and supplements the precipitation with municipal water supply. The foundation pit dewatering and rainwater collection system also includes a filtration mechanism for collecting rainwater from the foundation pit.

2. The collection and utilization system according to claim 1, characterized in that: The foundation pit dewatering and rainwater collection system includes an annular rainwater ditch excavated in the foundation pit and rainwater collection pits excavated at intervals in the annular rainwater ditch. The filtration mechanism is located on the side of the annular rainwater ditch and is higher than the annular rainwater ditch.

3. The collection and utilization system according to claim 2, characterized in that: The filtration mechanism is a filter screen vertically installed in the foundation on both sides of the pit.

4. The collection and utilization system according to claim 3, characterized in that: A filter tank, which is integrally formed into a U-shaped structure and embedded in the annular rainwater ditch, is connected between the filter screens on both sides of the foundation pit.

5. The collection and utilization system according to claim 4, characterized in that: The filter tank has a segmented splicing structure, with shoulders and stepped grooves arranged sequentially in the front and rear sections of each segment.

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