CN116905614A

CN116905614A - Non-negative pressure laminated water supply and sewage treatment method and system based on photovoltaic power generation

Info

Publication number: CN116905614A
Application number: CN202310697142.7A
Authority: CN
Inventors: 汤升华
Original assignee: Etit Smart Water Technology Co ltd
Current assignee: Etit Smart Water Technology Co ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2023-10-20

Abstract

The application relates to a photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment method and system, wherein the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment method is characterized in that a current grid-connected port power acquired by a current transformer of a main photovoltaic inverter is acquired by taking a photovoltaic inverter as a host, a photovoltaic inverter output power percentage upper limit value is calculated based on a PI controller algorithm by combining the current grid-connected port power and a preset grid-connected power upper limit value, and then the photovoltaic inverter output power percentage upper limit value is sent to each photovoltaic inverter in a broadcasting mode, so that the output power of each photovoltaic inverter is regulated and controlled by taking the photovoltaic inverter output power percentage upper limit value as a basis, and the grid-connected power control of each photovoltaic inverter can be realized. Besides, the control of the grid-connected power of each photovoltaic inverter is realized, and the method can also give consideration to water supply, pollution discharge and water pressure adjustment of a user pipe network side.

Description

Non-negative pressure laminated water supply and sewage treatment method and system based on photovoltaic power generation

Technical Field

The application relates to the technical field of new energy water treatment, in particular to a non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation.

Background

The current society has an increasing demand for energy, the lack of traditional energy is faced, the development of new energy technology is supported by national policy, solar energy is used as inexhaustible clean energy, the photovoltaic power generation technology is developed very rapidly, and the installed capacity of a photovoltaic power generation system is increased year by year.

The photovoltaic power generation technology is often used in a water supply system, however, the photovoltaic power generation is greatly influenced by the environment, the power generation power of the photovoltaic power generation is changed along with the change of illumination conditions, the photovoltaic power generation technology belongs to unstable energy, when a large number of photovoltaic modules are connected into the water supply system, the traditional water supply system generally only focuses on water supply control, and the control of grid-connected power of each photovoltaic inverter can not be realized while negative pressure-free water supply is not achieved. The grid-connected power control can limit the generated energy of the photovoltaic module, avoid excessive or less generation and realize the optimal use of the photovoltaic power.

Disclosure of Invention

Based on the above, it is necessary to provide a method for supplying water and sewage without negative pressure lamination based on photovoltaic power generation, which aims at the problem that the traditional water supply system generally only focuses on water supply control, and cannot realize the control of grid-connected power of each photovoltaic inverter while supplying water without negative pressure lamination.

The application provides a non-negative pressure laminated water supply and sewage treatment method and system based on photovoltaic power generation.

In one aspect, the application provides a non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation, which comprises the following steps:

the photovoltaic output power controller sends a power acquisition signal to the main photovoltaic inverter, and current grid-connected port power acquired by a current transformer of the main photovoltaic inverter is acquired;

the photovoltaic output power controller obtains a preset grid-connected power upper limit value, and calculates a photovoltaic inverter output power percentage upper limit value based on a PI controller algorithm;

the photovoltaic output power controller sends the upper limit value of the output power percentage of the photovoltaic inverter to each photovoltaic inverter in a broadcast mode, so that each photovoltaic inverter regulates and controls the output power of each photovoltaic inverter according to the upper limit value of the output power percentage of the photovoltaic inverter;

the photovoltaic output power controller controls the intelligent control cabinet electrically connected with the grid-connected port to start;

the intelligent control cabinet obtains the opening of the first water pipe and controls the closing of the two second water pipes;

the intelligent control cabinet acquires first sensing data acquired by a blockage sensor in the first water pipe and judges whether the first water pipe is blocked or not;

If the first water pipe is blocked, the intelligent control cabinet controls the second water pipe to be opened, controls the first water pipe to be closed, and controls the first water pipe to drain, so that the water flow of the tap water pipe network is guided to the water outlet and simultaneously the first water pipe is drained;

the intelligent control cabinet collects pressure data of the water inlet side pressure sensor and pressure data of the user side pressure sensor;

and the intelligent control cabinet controls the pressure stabilizing pump set to adjust the water pressure of the user pipe network side according to the pressure data of the water inlet side pressure sensor and the pressure data of the user side pressure sensor.

In another aspect, the present application provides a system for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation, applying the method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation as mentioned in the foregoing, the system for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation includes:

a photovoltaic power generation system; the photovoltaic power generation system comprises a main photovoltaic unit and a plurality of auxiliary photovoltaic units, wherein the main photovoltaic unit comprises a main photovoltaic module and a main photovoltaic inverter which are connected with each other; each auxiliary photovoltaic unit comprises an auxiliary photovoltaic module and an auxiliary photovoltaic inverter which are connected with each other;

The parallel network port is electrically connected with the output end of the main photovoltaic inverter and the output end of each auxiliary photovoltaic inverter;

the grid connection port is electrically connected with the side of the commercial power grid;

the current transformer is arranged on a connecting link between the parallel network port and the mains supply grid side;

the photovoltaic output power controller is electrically connected with the main photovoltaic inverter and the photovoltaic output power controller, and each auxiliary photovoltaic inverter is electrically connected with the photovoltaic output power controller;

the intelligent control cabinet is electrically connected with the grid-connected port;

a tap water pipe network side, wherein a water inlet side pressure sensor is arranged on the tap water pipe network side;

the water filtering device is connected with a tap water pipe network side pipeline; the water filtering device comprises a first water conveying pipe and two second water conveying pipes, wherein blocking sensors are arranged in the first water conveying pipe and the second water conveying pipes;

a non-negative pressure lamination steady flow tank;

one end of the water outlet pipeline is connected with the water filtering device, and the other end of the water outlet pipeline is connected with the non-negative pressure lamination steady flow tank;

the user pipe network side is provided with a user side pressure sensor;

one end of the water supply pipeline is connected with the non-negative pressure lamination steady flow tank, and the other end of the water supply pipeline is connected with a user pipe network side;

The pressure stabilizing pump set is arranged on the water supply pipeline and comprises a plurality of pressure stabilizing pumps.

The application relates to a non-negative pressure laminated water supply and sewage treatment method and system based on photovoltaic power generation. Besides, the control of the grid-connected power of each photovoltaic inverter is realized, and the method can also give consideration to water supply, pollution discharge and water pressure adjustment of a user pipe network side.

Drawings

Fig. 1 is a schematic flow chart of a method for supplying water and treating sewage without negative pressure lamination based on photovoltaic power generation according to an embodiment of the application.

Fig. 2 is a schematic structural diagram of a non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation according to an embodiment of the application.

Fig. 3 is a schematic structural diagram of a water filtering device of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 4 is a cross-sectional view of a water filtering device of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 5 is an enlarged view of the first movable block of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 6 is an enlarged view of the third connecting rod of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 7 is a cross-sectional view of the embodiment of fig. 2 at a first installation tank of a photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system.

Fig. 8 is an enlarged view of a third movable block of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 9 is a cross-sectional view of the embodiment of fig. 2 at a second push plate of the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system.

Fig. 10 is an enlarged view of a stopper of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 11 is an enlarged view of a second movable block of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 12 is a cross-sectional view of the embodiment of fig. 2 showing a third active chamber of the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system.

Fig. 13 is an enlarged view of the movable plate of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 14 is a cross-sectional view of the first transmission chamber of the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system of the embodiment of fig. 2.

Fig. 15 is an enlarged view of a fifth connection rod of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 16 is an enlarged view of the second driving wheel of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 17 is a cross-sectional view of the embodiment of fig. 2 showing a second bump of the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system.

Fig. 18 is an enlarged view of a second bump of the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system in the embodiment shown in fig. 2.

Fig. 19 is an enlarged view of the fourth connection block of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 20 is a cross-sectional view of the embodiment of fig. 2 at a second drive tank of the photovoltaic power generation-based non-negative pressure laminated water supply and wastewater treatment system.

Fig. 21 is an enlarged view of the eighth driving wheel of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 22 is a cross-sectional view of the embodiment of fig. 2 showing the photovoltaic power generation-based non-negative pressure laminated water supply and sewage treatment system at a second transmission chamber.

Fig. 23 is an enlarged view of a seventh driving wheel of the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Fig. 24 is a schematic structural diagram of a non-negative pressure lamination steady flow tank and a steady flow pump set of the non-negative pressure lamination water supply and sewage treatment system based on photovoltaic power generation in the embodiment shown in fig. 2.

Reference numerals:

100-a water filtering device; 101-a first water delivery pipe; 101 a-a first drain; 101 b-a first drain port; 102-a second water delivery pipe; 102 a-a second drain; a 103-connector; a 104-converter; 105-a first screen; 106-a second filter screen; 107-guide rails; 108-a first push plate; 1081-a first connecting spring; 109-a first push block; 1091-a second connecting spring; 110-a first driving wheel; 111-a first movable block; 1111—a first slider; 112-a first drive shaft; 113-a threaded rod; 114-a mounting frame; 115-a third connecting rod; 1151-a connecting shaft; 1152-a third drive shaft; 1153-a third drive wheel; 116-a second push plate; 117-baffles; 1171-a first connecting rod; 118-first connection plate; 1181-a second return spring; 1182-limiting blocks; 119-a first connection block; 120-a second movable block; 1201-third connecting spring; 121-a third movable block; 1211-fourth connecting springs; 122-first bump; 123-a water storage box; 124-fourth connecting rod; 125-a movable plate; 1251-fourth driving wheel; 1252-a second drive belt; 1253-a fifth driving wheel; 1254-sixth drive wheel; 1255-a third drive belt; 126-a first belt; 127-fifth connecting rod; 128-sixth connecting rod; 1281-limiting plates; 129-a second drive wheel; 130-second bump; 131-piston block; 1311—a first return spring; 132-ratchet plate; 1321-a second connection block; 1322-third connecting block; 133-third bump; 1331-third push rod; 134-fourth bump; 1341-fourth push rod; 135-moving plate; 136-a third water duct; 201-a non-negative pressure lamination steady flow tank; 202-a pressure stabilizing pump set; 202 a-a pressure stabilizing pump; 203-a water supply pipe; 204-a water outlet pipeline; 310-running water pipe network side; 311-a water side pressure sensor; 320-a user pipe network side; 321-user side pressure sensor; 410-a main photovoltaic unit; 411-primary photovoltaic module; 412-a main photovoltaic inverter; 420-a secondary photovoltaic unit; 421—a secondary photovoltaic module; 422-a secondary photovoltaic inverter; 500-networking ports; 600-mains power grid side; 700-current transformer; 800-a photovoltaic output power controller; 900-intelligent control cabinet.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The application provides a non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation. The application also discloses a water supply system and a sewage treatment method based on the photovoltaic power generation.

In addition, the non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation provided by the application is not limited to the execution main body. Optionally, the execution main body of the non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation provided by the application can be a non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation.

In an embodiment of the application, the non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation comprises the following steps:

and S100, the photovoltaic output power controller 800 sends a power acquisition signal to the main photovoltaic inverter 412 to acquire the current grid-connected port power acquired by the current transformer 700 of the main photovoltaic inverter 412.

Specifically, the output sides of the multiple photovoltaic inverters are connected together in parallel, one of the photovoltaic inverters is set as a primary photovoltaic inverter 412, and the other photovoltaic inverters are all secondary photovoltaic inverters 422. Current grid-tie power collected by current transformer 700 of main photovoltaic inverter 412. The current transformer 700 is installed on a connection link between the parallel port 500 and the utility grid side 600. The current transformer 700 is connected to the main photovoltaic inverter 412 through a data line such that data collected by the current transformer 700 may be transmitted to the main photovoltaic inverter 412. The primary photovoltaic inverter 412 may transmit the collected data to the photovoltaic output power controller 800.

S200, the photovoltaic output power controller 800 obtains a preset grid-connected power upper limit value, and calculates the photovoltaic inverter output power percentage upper limit value based on a PI controller algorithm.

Specifically, the photovoltaic output power controller 800 has a PI controller built therein, and the upper limit value of the photovoltaic inverter output power percentage can be calculated based on a PI controller algorithm.

And S300, the photovoltaic output power controller 800 sends the upper limit value of the output power percentage of the photovoltaic inverter to each photovoltaic inverter in a broadcast mode, so that each photovoltaic inverter regulates and controls the output power of each photovoltaic inverter according to the upper limit value of the output power percentage of the photovoltaic inverter.

Specifically, the photovoltaic output power controller 800 may transmit the photovoltaic inverter output power percentage upper limit value to each photovoltaic inverter in a broadcast form through a communication line connected with each photovoltaic inverter.

S400, the photovoltaic output power controller 800 controls the intelligent control cabinet 900 electrically connected with the grid-connected port 500 to start.

Specifically, the whole photovoltaic power generation system not only supplies power for the intelligent control cabinet 900, but also supplies power for non-negative pressure laminated water supply based on photovoltaic power generation and other power utilization components in sewage treatment.

S500, the intelligent control cabinet 900 obtains the first water pipe 101 to be opened, and controls the two second water pipes 102 to be closed.

Specifically, the water filtering device 100 includes a first water pipe 101 and two second water pipes 102.

S600, the intelligent control cabinet 900 acquires first sensing data acquired by the blockage sensor in the first water pipe 101, and judges whether the first water pipe 101 is blocked.

Specifically, the first water pipe 101 and the two second water pipes 102 are not simultaneously opened, and if one of them is blocked, the other is opened.

S610, if the first water pipe 101 is blocked, the intelligent control cabinet 900 controls the second water pipe 102 to open, controls the first water pipe 101 to close, and controls the first water pipe 101 to drain, so as to guide the water flow of the tap water pipe network to the water outlet and simultaneously perform the sewage treatment on the first water pipe 101.

Specifically, if the first water pipe 101 is blocked and at least one of the two second water pipes 102 is unblocked, the second water pipe 102 is opened. Otherwise, if any one of the two second water pipes 102 is blocked and the first water pipe 101 is unblocked, the first water pipe 101 is opened.

S700, the intelligent control cabinet 900 collects pressure data of the water inlet side pressure sensor and pressure data of the user side pressure sensor 321.

Specifically, the tap water pipe network side 310 is provided with a water inlet side pressure sensor. The customer premise side 320 is provided with a customer premise side pressure sensor 321.

S800, the intelligent control cabinet 900 controls the voltage stabilizing pump set 202 to adjust the water pressure of the user pipe network side 320 according to the pressure data of the water inlet side pressure sensor and the pressure data of the user side pressure sensor 321.

Specifically, the pressure stabilizing pump set 202 absorbs water from the tap water pipe network side 310 through the non-negative pressure-superposed flow stabilizing tank 201, so that the pressure of the tap water pipe network is utilized to the maximum extent, the pressure is superposed and pressurized, the energy is saved, and no secondary pollution is caused. The non-negative pressure-superposed steady flow tank 201 and the pressure stabilizing pump set 202 are matched for use, so that pressure fluctuation can be relieved, and the pressure stabilizing pump set 202 can be prevented from idling due to instant vacuum. Thus ensuring uninterrupted water consumption and stable pressure.

In this embodiment, by taking one photovoltaic inverter as a host, acquiring current grid-connected port power acquired by the current transformer 700 of the main photovoltaic inverter 412, calculating a photovoltaic inverter output power percentage upper limit value based on a PI controller algorithm by combining the current grid-connected port power and a preset grid-connected power upper limit value, and sending the photovoltaic inverter output power percentage upper limit value to each photovoltaic inverter in a broadcast mode, so that each photovoltaic inverter regulates and controls the output power of each photovoltaic inverter according to the photovoltaic inverter output power percentage upper limit value, and control of the grid-connected power of each photovoltaic inverter can be realized. In addition, besides the control of the grid-connected power of each photovoltaic inverter, the method can also give consideration to water supply, pollution discharge and water pressure adjustment of the user pipe network side 320.

In one embodiment of the present application, S200 includes:

s210, the photovoltaic output power controller 800 calculates the upper limit value of the output power percentage of the photovoltaic inverter according to the formula 1.

Plimit 1=u (n) =u (n-1) +kp1× [ E (n) -E (n-1) ]+ki1×e (n) formula 1

Where Plimit1 is the upper limit value of the output power percentage of the photovoltaic inverter, n is the serial number of the time node, u (n) is the output value of the PI controller of the photovoltaic output power controller 800 of the current time node, u (n-1) is the output value of the PI controller of the photovoltaic output power controller 800 of the previous time node, E (n) is the error value of the PI controller of the photovoltaic output power controller 800 of the current time node, E (n-1) is the error value of the PI controller of the photovoltaic output power controller 800 of the previous time node, kp1 is the first preset proportional parameter, and Ki1 is the first preset integral parameter.

The error value of the PI controller of the current time node photovoltaic output power controller 800 is the difference value between the preset grid-connected power upper limit value and the current grid-connected power.

Specifically, a preset grid-connected power upper limit value is taken as a target value, current grid-connected port power t is taken as a feedback value, and the upper limit value Plimit1 of the output power percentage of the photovoltaic inverter is obtained through a PI controller.

The preset grid-connected power upper limit value is set by a user or an installer of the photovoltaic power generation system, and is set according to the requirements of local grid-connected regulations, and some countries or regions have no limitation on grid-connected power, some countries or regions require Pexport limit to be set to zero, and some countries or regions allow grid-connected power with a certain value.

The photovoltaic inverter output power percentage upper limit value Plimit1 is a percentage ranging from 0 or more to 100% or less. Kp1 and Ki1 are conventional parameters and can be obtained by looking through the technical manual.

In an embodiment of the present application, after performing S210 the photovoltaic output power controller 800 to send the photovoltaic inverter output power percentage upper limit value to each photovoltaic inverter in a broadcast form, each photovoltaic inverter calculates the output power upper limit value of each photovoltaic inverter according to formula 2.

Plimit2 (m) =plimit 1×pmax (m) equation 2

Wherein Plimit2 (m) is the upper limit value of the output power of each photovoltaic inverter, plimit1 is the upper limit value of the output power percentage of the photovoltaic inverter, and m is the id of the photovoltaic inverter. Pmax (m) is the maximum allowable output power value of each photovoltaic inverter.

Specifically, pmax (m) is the maximum allowable output power value of each photovoltaic inverter, and its value can be determined by the following conditions:

1. the maximum output power of the machine defined by the specification of the photovoltaic inverter.

2. The photovoltaic inverter limits the output power due to an increase in internal temperature, which can be estimated from the temperature of the external environment.

3. And (3) according to grid-connected regulation requirements, carrying out maximum output power limitation on the machine.

The output values of the above conditions are minimized to obtain Pmax (m). It can be seen that the parameters of each photovoltaic inverter are different.

In an embodiment of the present application, each photovoltaic inverter in S300 regulates and controls the output power of each photovoltaic inverter based on the upper limit value of the output power percentage of the photovoltaic inverter, including:

each photovoltaic inverter performs the following steps.

S321, the photovoltaic inverter calculates an output power target value of the photovoltaic inverter according to the formula 3.

P3 (m) =w (n-1) +kp2× [ e (n) -e (n-1) ]+ki2×w (n) formula 3

Wherein, P3 is the output power target value of the photovoltaic inverter, m is the id of the photovoltaic inverter, P3 (m) is the output power target value of the photovoltaic inverter with id of m, n is the serial number of the time node, w (n) is the output value of the PI controller in the photovoltaic inverter at the current time node, w (n-1) is the output value of the PI controller in the photovoltaic inverter at the previous time node, e (n) is the error value of the PI controller in the photovoltaic inverter at the current time node, e (n-1) is the error value of the PI controller in the photovoltaic inverter at the previous time node, kp2 is a second preset proportional parameter, and Ki2 is a second preset integral parameter.

The error value of the PI controller in the photovoltaic inverter at the current time node is the difference value between the upper limit value of the output power of the photovoltaic inverter and the output power of the current inverter.

Specifically, the calculation principle of the PI controller is adopted in the same manner as the formula 2, and will not be described here again. Each inverter takes Plimit2 (m) as a reference value of an output power target value, takes the current output power of the inverter as a feedback value, and obtains an output power target value P3 of the photovoltaic inverter through a PI controller.

S322, the photovoltaic inverter adjusts the output voltage of the photovoltaic module so that the output power of the photovoltaic inverter reaches the output power target value of the photovoltaic inverter.

Specifically, when the current inverter output power of each photovoltaic inverter is greater than Plimit2 (m), a power limiting flag bit is set, a power limiting control loop is started, an output power target value P3 of the photovoltaic inverter is calculated according to formula 3, P3 replaces the target value originally output by the photovoltaic inverter according to an MPPT algorithm, P3 is used as a power output target in power limiting, and the output voltage of the photovoltaic module is regulated so that the output power of the photovoltaic inverter reaches the output power target value P3 of the photovoltaic inverter.

In an embodiment of the present application, after executing S600, that is, executing the intelligent control cabinet 900 to obtain the first sensing data collected by the blockage sensor in the first water pipe 101, and determining whether the first water pipe 101 is blocked, the method further includes:

s621, if the first water pipe 101 is not blocked, the intelligent control cabinet 900 controls the first water pipe 101 to be opened and the two second water pipes 102 to be closed.

S622, the intelligent control cabinet 900 acquires the second sensing data acquired by the blockage sensor in each second water pipe 102, and judges whether any second water pipe 102 is blocked.

S623, if any one of the second water pipes is blocked, the intelligent control cabinet 900 performs the sewage treatment on the blocked second water pipe 102.

Specifically, the water filtering device 100 includes a first water pipe 101, a second water pipe 102, a first filter 105, a second filter 106, and a connector 103. The first water conveying pipe 101 and the second water conveying pipe 102 are used alternately, water flows through the second water conveying pipe 102 when the first filter screen 105 is cleaned, and water flows through the first water conveying pipe 101 when the second filter screen 106106 is cleaned, so that the water flows can be conveyed normally, and normal water supply of households is ensured.

The blockage sensor can be a water pressure sensor or a flow sensor, and can judge whether blockage occurs or not through comparison of water pressure or flow and a preset value.

In an embodiment of the present application, the S610 includes:

s611, if the first water pipe 101 is blocked, the intelligent control cabinet 900 acquires the second sensing data acquired by the blocking sensor in each second water pipe 102, and determines whether any second water pipe 102 is not blocked.

And S612, if all the second water pipes 102 are not blocked, the intelligent control cabinet 900 controls the second water pipes 102 which are not blocked to be opened and controls the first water pipes 101 to be closed.

S613, the intelligent control cabinet 900 performs pollution discharge treatment on the first water pipe 101.

Specifically, a converter 104 is provided in the connector 103, and the converter 104 is configured to have a first flow passage, a second flow passage, and a third flow passage that communicate with each other. A first one-way valve is arranged in a first flow passage of the connector 103 at the water inlet end of the first water pipe 101, so that water flow can only flow from the first flow passage to the second flow passage and the third flow passage, a stop valve is arranged in a first flow passage of the converter 104 in the connecting cavity at the water outlet end of the first water pipe 101, the converter 104 is in a spherical structure, and the diameter of the converter 104 is the same as that of the connector 103. The bottom of the converter 104 is provided with a second transmission shaft, the second transmission shaft penetrates out of the connector 103, the bottom of the connector 103 is provided with a driving piece for driving the second transmission shaft to rotate, and the driving piece can be a motor.

When the first water pipe 101 is used, the converter 104 in the connector 103 at the water inlet end of the first water pipe 101 rotates, the second flow passage is aligned with the water inlet of the connector 103, the third flow passage is aligned with the water inlet of the first water pipe 101, the converter 104 in the connector 103 at the water outlet end of the first water pipe 101 also rotates, the second flow passage is aligned with the water outlet of the first water pipe 101, the third flow passage is aligned with the water outlet of the connector 103, and the first flow passage is closed by the stop valve. The water flow enters the first water pipe 101 through the second flow channel and the third flow channel after entering the connecting piece, and flows out from the second flow channel and the third flow channel on the converter 104 in the connector 103 at the other end of the first water pipe 101. When the second water pipe 102 is used, the converter 104 in the connector 103 at the water inlet end of the first water pipe 101 rotates, the first flow passage is aligned with the water inlet of the connector 103, the second flow passage and the third flow passage are aligned with the water inlet of the second water pipe 102, the converter 104 in the connector 103 at the water outlet end of the first water pipe 101 also rotates, the first flow passage is aligned with the water outlet of the connector 103, the second flow passage and the third flow passage are aligned with the water outlet of the second water pipe 102, and the stop valve opens the first flow passage. The water flow entering the connector 103 enters the second flow channel and the third flow channel through the first flow channel, the water flow is conveyed into the second water conveying pipe 102, the water flow in the second water conveying pipe 102 flows out of the second flow channel and the third flow channel on the converter 104 in the connector 103 at the other end, and finally flows out of the connector 103 from the first flow channel, so that the conversion between the first water conveying pipe 101 and the second water conveying pipe 102 is realized.

In an embodiment of the application, the step S613 includes:

s613a, the intelligent control cabinet 900 controls the opening of the water outlet, and the water flow in the first water pipe 101 passes through the first filter screen 105 and then enters the water storage box 123 through the water outlet.

S613b, the intelligent control cabinet 900 controls the water flow in the water storage box 123 to be sprayed on the first filter screen 105.

S613c, the intelligent control cabinet 900 controls the first drain 101a to be opened, so that the water droplets sprayed on the first filter screen 105 are discharged from the first drain 101a together with the impurities.

Specifically, the bottom of the first water pipe 101 is provided with a water storage box 123, the first water pipe 101 is provided with a water outlet 101b communicated with the water storage box 123, a first electromagnetic valve is arranged in the water outlet 101b, the first water pipe 101 is provided with a third water pipe 136 communicated with the water storage box 123 and the first cavity, and the third water pipe 136 is internally provided with a second one-way valve so that water flow can only flow into the first cavity from the water storage box 123. After the first water pipe 101 is closed, water flow enters the second water pipe 102, the first electromagnetic valve is opened, the water flow in the first water pipe 101 enters the water storage box 123 through the first water outlet 101b, and the water flow passes through the first filter screen 105 when entering the water storage box 123, so that the water flow is filtered.

After the first preset cleaning period, the intelligent control cabinet 900 controls the first sewage outlet 101a to be opened, so that the water droplets sprayed on the first filter screen 105 are discharged from the first sewage outlet 101a together with the impurities.

In an embodiment of the present application, the performing, by the intelligent control cabinet 900, the sewage treatment on the blocked second water pipe 102 in S623 includes:

and S623a, the intelligent control cabinet 900 controls the second water delivery pipe 102 with the blockage to be closed, water flows from the first water delivery pipe 101 to drive the second push plate 116 to move, the first push plate 108 impacts on the second filter screen 106, and after the first movable block 111 moves from the guide rail 107 to the bottom and then to the top, the second sewage outlet 102a is opened, so that the water flows and impurities in the second water delivery pipe 102 with the blockage are discharged from the second sewage outlet 102a together.

Specifically, when the water flow is converted from the second water pipe 102 to flow in the first water pipe 101, the water still remains in the second water pipe 102, the water flow is flushed on the second push plate 116 when flowing in the first water pipe 101, at this time, the second through groove on the baffle 117 is staggered with the first through groove on the second push plate 116, the first through groove is in a closed state, the water flow pushes the second push plate 116 to move, the third connecting rod 115 rotates in the connecting cavity, the third connecting rod 115 pulls the first connecting rope to move, the first connecting rope winds out from the first transmission shaft 112 to drive the first transmission shaft 112 to rotate, the first transmission shaft 112 drives the first transmission wheel 110 to rotate, the second connecting rope pulls the first push block 109 to move, the first push block 109 moves towards one end of the second cavity, negative pressure is generated in the second cavity when the first push block 109 moves, part of the water flow is pumped into the second cavity, the first push block 109 moves to one end of the second cavity and then drives the first push plate 108 to move together, and the first push plate 108 extrudes the first connecting spring 1081. After the second push plate 116 moves to the designated position, the baffle 117 moves in the first movable cavity, the second through groove moves to be aligned with the first through groove, the first through groove is opened, water flows through the first through groove, the first push plate 108 is pushed to move outside the first movable groove by the first connecting spring 1081, the first push block 109 is pushed to move towards one end of the second cavity by the second connecting spring 1091, the second push plate 108 impacts on the back surface of the second filter screen 106 to deform the second filter screen 106, the first push block 109 sprays water flow in the second cavity from the second water spray hole, the water flow sprays on the second filter screen 106, and the second filter screen 106 is cleaned by being matched with the first push plate 108, so that the cleaning effect on the second filter screen 106 is improved.

After the second preset cleaning time period passes, the intelligent control cabinet 900 controls the second sewage outlet 102a to be opened, so that the water flow and impurities in the blocked second water pipe 102 are discharged from the second sewage outlet 102a together.

In an embodiment of the present application, the S800 includes:

s810, judging whether the pressure value of the water inlet side pressure sensor is smaller than a preset pressure value.

S820, if the pressure value of the water inlet side pressure sensor is smaller than the preset pressure value, the nth stabilized pump 202a is controlled to start and operate in a variable frequency mode so as to supply water for user network overlapping. n is the serial number of the regulated pump 202a and the initial value of n is 1.

S830, it is monitored in real time whether the pressure value of the user side pressure sensor 321 is smaller than a preset pressure value.

And S840, if the pressure value of the user side pressure sensor 321 is smaller than the preset pressure value, controlling the first voltage stabilizing pump to be converted into power frequency, controlling the n+1th voltage stabilizing pump to start and operate in a variable frequency mode, and returning to S830 until the pressure value of the user side pressure sensor 321 is equal to the preset pressure value.

Specifically, when the power is turned on in the automatic mode, the pressure value of the water inlet side pressure sensor is lower than a preset pressure value, the first stabilized pump is automatically controlled to perform variable frequency operation to supply water by utilizing municipal pressure resource lamination, and the first stabilized pump is controlled to operate at a constant rotating speed until the pressure value of the user side pressure sensor 321 is equal to the preset pressure value, namely, the power frequency is entered. The higher the pressure value of the intake side pressure sensor, the lower the rotation speed of the first pressure stabilizing pump, and the lower the pressure value of the intake side pressure sensor, the higher the rotation speed of the first pressure stabilizing pump. When the pressure reaches the upper limit and exceeds the delay time, the frequency converter starts to sleep, and when the pressure drops to the awakening value, the first voltage stabilizing pump is automatically awakened.

If the first pressure stabilizing pump still cannot meet the upper limit of the frequency of water, and the time is delayed for a few seconds, the system can automatically start the second pressure stabilizing pump, and the starting flow is as follows: 1) The first voltage stabilizing pump is turned into power frequency. 2) The variable frequency starts the second pressure stabilizing pump. 3) Judging whether the pressure value of the user side pressure sensor 321 is smaller than a preset pressure value, if the pressure value of the user side pressure sensor 321 still cannot reach the preset pressure value at the moment, converting the current variable frequency pump into power frequency to continue to start the next water pump in a variable frequency mode until the pressure value of the user side pressure sensor 321 reaches the preset pressure value.

If the pressure value of the user side pressure sensor 321 is greater than the preset pressure value and exceeds the preset delay time, the intelligent control cabinet 900 will automatically reduce the pump, the intelligent control cabinet 900 adopts a mode of directly stopping the power frequency pump, and if the pressure is still high, the next stabilized pressure pump 202a will be continuously stopped until the pressure value of the user side pressure sensor 321 is equal to the preset pressure value.

More than two (including 2) stabilized pumps 202a are provided in the system, if one stabilized pump 202a runs to completely meet the water requirement, the system uses the stabilized pump 202a in a timing and rotation way, and the rotation time interval is 4 hours (the user can activate or deactivate the timing and rotation pump function according to the requirement and can set the switching time range for 2 minutes to 24 hours by himself). If one pressure stabilizing pump 202a cannot meet the water requirement, the system needs to add or subtract the pump, and then the system adopts a mode of sequential use, namely adding firstly and stopping firstly and then adding secondly.

The application also provides a system for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation.

In an embodiment of the present application, the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation applies the non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation as mentioned in any one of the foregoing embodiments.

The non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation comprises a photovoltaic power generation system, a grid connection port 500, a commercial power grid side 600, a current transformer 700, a photovoltaic output power controller 800, an intelligent control cabinet 900, a tap water pipe network side 310, a water filtering device 100, a non-negative pressure laminated steady flow tank 201, a water outlet pipeline 204, a user pipe network side 320, a water supply pipeline 203 and a steady pressure pump set 202.

The photovoltaic power generation system includes a main photovoltaic unit 410 and a plurality of sub-photovoltaic units 420, and the main photovoltaic unit 410 includes a main photovoltaic module 411 and a main photovoltaic inverter 412 connected to each other. Each sub-photovoltaic unit 420 includes a sub-photovoltaic module 421 and a sub-photovoltaic inverter 422 connected to each other.

The output of the primary photovoltaic inverter 412 and the output of each secondary photovoltaic inverter 422 are electrically connected to the shunt port 500. The parallel port 500 is electrically connected to the utility grid side 600. The current transformer 700 is installed on a connection link between the parallel port 500 and the utility grid side 600. The primary photovoltaic inverter 412 is electrically connected to the photovoltaic output power controller 800, and each secondary photovoltaic inverter 422 is electrically connected to the photovoltaic output power controller 800. The intelligent control cabinet 900 is electrically connected with the grid-connected port 500. The tap water pipe network side 310 is provided with an inflow side pressure sensor. The water filter device 100 is connected to the tap water pipe network side 310 through a pipeline. The water filtering device 100 comprises a first water conveying pipe 101 and two second water conveying pipes 102, wherein blocking sensors are arranged in the first water conveying pipe 101 and the second water conveying pipes 102. A water outlet pipeline 204, one end of which is connected with the water filtering device 100, and the other end of which is connected with the non-negative pressure lamination steady flow tank 201. The customer premise side 320 is provided with a customer premise side pressure sensor 321. One end of the water supply pipeline 203 is connected with the non-negative pressure lamination steady flow tank 201, and the other end is connected with the user pipe network side 320. A regulated pump set 202 disposed on a water supply pipeline 203, the regulated pump set 202 comprising a plurality of regulated pumps.

Specifically, the intelligent control cabinet 900 is connected with the parallel network port 500, which is equivalent to connecting a photovoltaic power generation system and a utility power grid side 600, so that when sunlight is sufficient in daytime, other power utilization components in the intelligent control cabinet 900 and a water supply system can be powered through the photovoltaic power generation system, normal water supply, pollution discharge and water pressure control are ensured.

When sunlight is insufficient at night, the intelligent control cabinet 900 and other power utilization components in the water supply system are powered through the mains supply power grid side 600, normal water supply is ensured, pollution discharge is ensured, and water pressure is controlled.

The technical features of the above embodiments may be combined arbitrarily, and the steps of the method are not limited to the execution sequence, so that all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description of the present specification.

The water filtering device 100 comprises a first water pipe 101, a second water pipe 102, a first filter screen 105, a second filter screen 106 and a connector 103. The first water pipe 101 is constructed to have a pipe structure for conveying water flow. The second water pipe 102 is disposed at one side of the first water pipe 101. The first filter screen 105 is disposed in the first water pipe 101. The second filter 106 is disposed in the second water pipe 102. The connector 103 controls the water flow into the first water pipe 101 or the second water pipe 102 so that the second filter 106 or the first filter 105 is cleaned in the second water pipe 102 or the first water pipe 101.

The two second water pipes 102 are respectively arranged at two sides of the first water pipe 101, the diameter of each second water pipe 102 is smaller than that of each first water pipe 101, and the flow in each second water pipe 102 corresponds to the flow in one first water pipe 101. The two connectors 103 are respectively arranged at one end of the first water pipe 101, the connectors 103 are four-way pipes, and the two second water pipes 102 are respectively inserted at two sides of the connectors 103.

The second water pipe 102 is internally provided with a guide rail 107, the guide rail 107 is provided with a first movable block 111, the first movable block 111 is provided with a first movable groove, a first push plate 108 is arranged in the first movable groove, one end of the first push plate 108 is provided with a first connecting spring 1081, and the other end of the first connecting spring 1081 is fixedly connected in the first movable groove. The guide rail 107 is disposed on the back of the second filter screen 106, i.e. on the side close to the water outlet of the second water pipe 102. The first push plate 108 is provided with a second cavity, one end of the second cavity is provided with a plurality of second water spray holes, the second cavity is internally provided with a first push block 109, the first push block 109 is provided with a second connecting spring 1091, and one end of the second connecting spring 1091 is fixedly connected to the inner wall of the second cavity. The side wall of the first movable block 111 is provided with a third through groove, a first driving wheel 110 is arranged in the third through groove, a first groove is arranged on the guide rail 107, the first groove is arranged on one side of the third through groove, a first transmission shaft 112 matched with the first driving wheel 110 is arranged in the first groove, the first push block 109 is provided with a second connecting rope, and one end of the second connecting rope is wound on the first driving wheel 110.

The first connecting block 119 is arranged on the side wall of the first water pipe 101, the first connecting block 119 is used for connecting the first water pipe 101 and the second water pipe 102, a connecting cavity is arranged on the first connecting block 119, a third connecting rod 115 is connected in a rotating mode in the connecting cavity, a second push plate 116 is arranged at one end of the third connecting rod 115, a first connecting rope is arranged at the other end of the third connecting rod, and the other end of the first connecting rope is fixedly connected to the first transmission shaft 112. The second push plate 116 is provided with a plurality of first through grooves and a first movable cavity, a baffle 117 is arranged in the first movable cavity, and a plurality of second through grooves corresponding to the first through grooves are arranged on the baffle 117.

The third connecting rod 115 is provided with a connecting shaft 1151, the inner wall of the connecting cavity is provided with a first mounting groove corresponding to the connecting shaft 1151, the connecting shaft 1151 is rotationally connected in the first mounting groove, the connecting shaft 1151 is provided with a ring groove, the inner wall of the ring groove is provided with a second movable groove, the second movable groove is internally provided with a second movable block 120, the second movable block 120 is provided with a third connecting spring 1201, one end of the third connecting spring 1201 is fixedly connected in the second movable groove, the second movable block 120 is provided with a first connecting rod 1171, and the first connecting rod 1171 is connected with the baffle 117. The first movable cavity side wall is provided with a second movable cavity, the second movable cavity is internally provided with a first connecting plate 118, the first connecting plate 118 is provided with a limiting block 1182 and a second return spring 1181, the limiting block 1182 is arranged in the first movable cavity in a penetrating mode, the second return spring 1181 is propped against the inner wall of the second movable cavity, the connecting shaft 1151 is further provided with a fourth movable groove, the fourth movable groove is internally provided with a third movable block 121, the third movable block 121 is provided with a fourth connecting spring 1211 and a second connecting rod, and the second connecting rod is connected with the first connecting plate 118. The first mounting groove inner wall is provided with a first bump 122, and the first bump 122 penetrates through the annular groove.

When the second push plate 116 is parallel to the first filter screen 105, the first protruding block 122 abuts against the second movable block 120, the second movable block 120 drives the baffle 117 to move, the first through groove and the second through groove are staggered, the first through groove is closed, the limiting block 1182 abuts against one end of the baffle 117, when water flow passes through the first water pipe 101, the second push plate 116 is pushed to move, the second push plate 116 drives the connecting shaft 1151 to rotate when moving, the connecting shaft 1151 rotates in the first mounting groove, the third movable block 121 rotates to the first protruding block 122, the first protruding block 122 pushes the third movable block 121 to move into the fourth movable groove, the third movable block 121 drives the first connecting plate 118 to move together, the limiting block 1182 enters into the second movable cavity, the limiting block 1182 moves away from one end of the baffle 117, the third connecting spring 1201 pushes the second movable block 120 to move outside the second movable groove, the second movable block 120 drives the baffle 117 to move in the first movable cavity, the baffle 117 moves to an alignment state of the second through groove and the first through groove, the first through groove is in an opening state, when the water flow passes through the first through groove and the first connection spring 1081 pushes the first push plate 108 to move, the third connection rope winds out of the first transmission wheel 110 to drive the first transmission wheel 110 to rotate, the first transmission wheel 110 drives the first transmission shaft 112 to rotate, the first transmission shaft 112 rotates to wind the first connection rope on the first transmission shaft 112, the first connection rope pulls the third connection rod 115 to rotate back, the second push plate 116 rotates again to a state parallel to the first filter screen 105, the second movable block 120 rotates to one side of the first bump 122 again, the baffle 117 moves again to seal the first through groove, the third connection rod 115 continuously rotates repeatedly, thereby driving the first push plate 108 to intermittently impact on the second filter screen 106 to clean the second filter screen 106.

The first movable block 111 is provided with a first slide block 1111, the inner wall of the guide rail 107 is provided with a first chute corresponding to the first slide block 1111, the first slide block 1111 is provided with a threaded hole, the first chute is internally provided with a threaded rod 113, the threaded rod 113 is arranged in the threaded hole in a penetrating way, the threaded rod 113 is mutually matched with the threaded hole, the bottom of the first installation groove is provided with a first transmission groove, the first water pipe 101 is also provided with a fourth connecting rod 124, the other end of the fourth connecting rod 124 is fixedly connected to the second water pipe 102, the fourth connecting rod 124 is provided with a first transmission cavity, the threaded rod 113 is arranged in the first transmission cavity in a penetrating way, the first transmission cavity is also provided with a second transmission wheel 129, and the second transmission wheel 129 and the threaded rod 113 form transmission fit through a first transmission belt 126. The first connecting block 119 is connected with the fourth connecting rod 124, a third movable cavity which is communicated with the first transmission groove and the first transmission cavity is arranged on the first connecting block 119, a third transmission shaft 1152 is arranged at the bottom of the connecting shaft 1151, the third transmission shaft 1152 is arranged in the first transmission groove in a penetrating mode, a third transmission wheel 1153 is arranged at the bottom of the third transmission shaft 1152, a second groove is arranged at the bottom of the third movable cavity, a movable plate 125 is arranged in the second groove, and a first transmission assembly and a second transmission assembly are arranged on the movable plate 125.

Specifically, the movable plate 125 is provided with a separation cavity, and the first transmission assembly includes two fourth transmission wheels 1251 disposed in the separation cavity, a second transmission belt 1252 wound on the two fourth transmission wheels 1251, and a fifth transmission wheel 1253 matched with the second transmission belt 1252. The second transmission assembly includes two sixth transmission wheels 1254 provided at the top of the movable plate 125 and a third transmission belt 1255 wound around the two sixth transmission wheels 1254. The bottom of the guide rail 107 is provided with a first push rod, the top of the guide rail 107 is provided with a second push rod, the first push rod is connected to the bottom of the movable plate 125 through a fifth connecting rod 127, the second push rod is provided with a sixth connecting rod 128, the fifth connecting rod 127 is provided with a fourth groove corresponding to the sixth connecting rod 128, the sixth connecting rod 128 is arranged in the fourth groove in a penetrating mode, and the bottom end of the sixth connecting rod 128 is provided with a limiting plate 1281.

When the first movable block 111 moves to the top of the guide rail 107, the first movable block 111 pushes the second push rod to move upwards, the limiting plate 1281 abuts against the bottom of the fifth connecting rod 127, the sixth connecting rod 128 moves to drive the fifth connecting rod 127 to move, the fifth connecting rod 127 drives the movable plate 125 to move upwards, the second transmission belt 1252 moves to one side of the third transmission wheel 1153, the fifth transmission wheel 1253 moves to one side of the first transmission belt 126, the third transmission wheel 1153 drives the second transmission belt 1252 to rotate when the water flow pushes the second push plate 116 to move, the fifth transmission wheel 1253 drives the first transmission belt 126 to rotate to enable the threaded rod 113 to rotate clockwise, and then the first movable block 111 moves to the bottom of the lower guide rail 107 under the cooperation of threads. When the first movable block 111 moves to the bottom of the guide rail 107, the first movable block 111 pushes the first push rod to move downwards, the first push rod drives the movable plate 125 to move downwards, the third driving belt 1255 moves between the third driving wheel 1153 and the first driving belt 126, and when the second push plate 116 drives the third connecting rod 115 to rotate, the power of the third driving wheel 1153 is transmitted to the threaded rod 113 through the third driving belt 1255, the threaded rod 113 rotates anticlockwise, and the first movable block 111 is driven to move towards the top of the guide rail 107, so that the first push plate 108 is impacted on the second filter screen 106 from different positions, and the cleaning effect on the second filter screen 106 is effectively improved.

The third driving wheel 1153 is a unidirectional gear, and only when the second push plate 116 rotates toward the water outlet end of the first water pipe 101, the third driving wheel 1153 can drive the second driving belt 1252 or the third driving belt 1255, and when the second push plate 116 rotates toward the water inlet end of the first water pipe 101, the third driving wheel 1153 does not drive the second driving belt 1252 or the third driving belt 1255 to rotate.

The first water pipe 101 is internally provided with a second bump 130, the second bump 130 is internally provided with a first cavity, the top of the first cavity is provided with a plurality of first water spraying holes, the first cavity is internally provided with a baffle plate, the baffle plate divides the first cavity into an upper cavity and a lower cavity, the lower cavity is internally provided with a piston block 131, the piston block 131 is provided with a first reset spring 1311, the side wall of the first cavity is provided with a second transmission cavity, the second transmission cavity is internally provided with a seventh transmission wheel 141 in driving fit with the piston block 131, the bottom of the first cavity is provided with a third movable groove, the third movable groove is internally provided with a ratchet plate 132, and the ratchet plate 132 is arranged so that the piston block 131 can only move towards the direction of the first reset spring 1311.

The bottom of the first water delivery pipe 101 is provided with a water storage box 123, the first water delivery pipe 101 is provided with a first water outlet 101b communicated with the water storage box 123, a first electromagnetic valve is arranged in the first water outlet 101b, the first water delivery pipe 101 is provided with a third water delivery pipe 136 communicated with the water storage box 123 and the first cavity, and the third water delivery pipe 136 is internally provided with a second one-way valve so that water flow can only flow into the first cavity from the water storage box 123. The bottom of the first cavity is provided with a third lug 133 and a fourth lug 134, the ratchet plate 132 is arranged between the third lug 133 and the fourth lug 134, the bottom of the ratchet plate 132 is hinged with a second connecting block 1321, the bottom of the second connecting block 1321 is hinged with a third connecting block 1322, the bottom of the third connecting block 1322 is hinged with the bottom of a third movable groove, a movable plate 135 is arranged in the third movable groove, a fifth through groove is arranged on the movable plate 135, the second connecting block 1321 and the third connecting block 1322 are both arranged in the fifth through groove, a fifth movable groove communicated with the third movable groove is arranged on the third lug 133, a sixth movable groove communicated with the third movable groove is arranged on the third lug 133, a third push rod 1331 connected with the movable plate 135 is arranged in the fifth movable groove, and a fourth push rod 1341 connected with the movable plate 135 is arranged in the sixth movable groove.

After the first water pipe 101 is closed, water flow enters the second water pipe 102, the first electromagnetic valve is opened, the water flow in the first water pipe 101 enters the water storage box 123 through the first water outlet, and the water flow passes through the first filter screen 105 when entering the water storage box 123, so that the water flow is filtered. The seventh driving wheel 141 drives the piston block 131 to move, the piston block 131 moves towards the first reset spring 1311 to form negative pressure in the first cavity, the third water pipe 136 sucks water flow in the water storage box 123 into the first cavity, water flow is filled in the first cavity, when the piston block 131 moves to one end of the first cavity, the piston block 131 pushes the third push rod 1331 to move, the third push rod 1331 drives the moving plate 135 to move, the inner wall of the fifth through groove abuts against the joint of the second connecting block 1321 and the third connecting block 1322 to push the second connecting block 1321 and the third connecting block 1322 to rotate, the second connecting block 1321 and the third connecting block 1322 rotate to drive the ratchet plate 132 to move into the third movable groove, the ratchet plate 132 is out of contact with the piston block 131, the first reset spring 1311 pushes the piston block 131 to move, and the water flow in the first cavity is extruded from the first water spray hole, and the water flow is sprayed on the back surface of the first filter screen 105 to do cleaning on the back surface of the first filter screen 105. When the piston block 131 moves to the side of the fourth protruding block 134, the piston block 131 pushes the fourth push rod 1341 to move, the fourth push rod 1341 drives the moving plate 135 to push the second connecting block 1321 and the third connecting block 1322 to reversely rotate when the moving plate 135 moves, the second connecting block 1321 and the third connecting block 1322 push the ratchet plate 132 to move upwards, and the ratchet plate 132 contacts with the bottom surface of the piston block 131 again, so that the reset of the ratchet plate 132 is completed.

The side wall of the first mounting groove is provided with a second transmission groove, the second transmission groove is internally provided with an eighth transmission wheel 140 matched with the connecting shaft 1151, the bottom of the second transmission groove is provided with a third transmission cavity communicated with the second transmission cavity, the bottom of the eighth transmission wheel 140 is provided with a fourth transmission shaft 1401, the fourth transmission shaft 1401 penetrates through the third transmission cavity, the seventh transmission wheels 141 are respectively arranged at two ends of the second transmission cavity in two groups, the two seventh transmission wheels 141 are wound with a fourth transmission belt 142, and the fourth transmission belt 142 is in transmission fit with the fourth transmission shaft 1401. And part of the circumferential surface of the connecting shaft 1151 is provided with transmission teeth in transmission fit with the eighth transmission wheel 140, the transmission teeth and the eighth transmission wheel 140 are in unidirectional transmission, and the connecting shaft 1151 can drive the eighth transmission wheel 140 to rotate only when the second push plate 116 moves towards the first filter screen 105.

The other end of the third connecting rod 115 is provided with a third push plate which has the same structure as the second push plate 116 and is also provided with a baffle 117 which is opened and closed in the same way as the second push plate 116.

After the first water pipe 101 is closed, water flow enters the second water pipe 102, the water flow impacts on the third push plate, the third push plate drives the third connecting rod 115 to rotate, the second push plate 116 impacts on the first filter screen 105 to clean the first filter screen 105, meanwhile, the connecting shaft 1151 drives the seventh driving wheel 141 to rotate when rotating, the seventh driving wheel 141 drives the piston block 131 to intermittently move, water flow in the water storage box 123 is sucked into the first cavity, and the first filter screen 105 is cleaned by being matched with the second push plate 116.

The second water pipe 102 is only used temporarily when the first filter screen 105 in the first water pipe 101 is cleaned or replaced, and water flows through the first water pipe 101 when the device is used normally, so that different cleaning modes are adopted for the first filter screen 105 and the second filter screen 106.

The bottom of the first water pipe 101 is provided with a first sewage outlet 101a, a second electromagnetic valve is arranged in the first sewage outlet 101a, the bottom of the second water pipe 102 is provided with a second sewage outlet 102a, and a third electromagnetic valve is arranged in the second sewage outlet 102 a.

When the first filter screen 105 is cleaned, the first water pipe 101 is closed, the water outlet is opened, water in the first water pipe 101 flows out of the water outlet after passing through the first filter screen 105, then the first drain outlet is opened, and water drops sprayed on the first filter screen 105 and impurities fall out of the first drain outlet together. When the second filter screen 106 is cleaned, the second water pipe 102 is closed, and water flows from the first water pipe 101 to drive the second push plate 116 to move, so that the first push plate 108 impacts on the second filter screen 106. After the first movable block 111 moves from the top to the bottom of the guide rail 107 to the top, the second drain is opened, and the water flow and impurities in the second water pipe 102 are discharged from the second drain together.

The first water pipe 101 is provided with a second installation groove, an installation frame 114 is arranged in the second installation groove, the first filter screen 105 is arranged in the installation frame 114, a fourth connecting block 1141 is arranged on the installation frame 114, a seventh movable groove is arranged on the inner wall of the second installation groove, a fixed block 137 is arranged in the seventh movable groove, a fifth connecting spring 1371 is arranged on the fixed block 137, one end of the fifth connecting spring 1371 is fixedly connected in the seventh movable groove, a fixed groove corresponding to the fixed block 137 is arranged on the fourth connecting block 1141, a second pushing block 138 is arranged in the fixed groove, a first chute is arranged at the bottom of the second pushing block 138, and a second chute is arranged on the fixed block 137. The bottom of the fixed groove is provided with a third groove, a fourth push plate 139 matched with the second push block 138 is arranged in the third groove, a handle 1391 connected with the fourth push plate 139 is arranged on the fourth connecting block 1141, and the handle 1391 is arranged above the fourth connecting block 1141. The second pushing block 138 is provided with a second sliding block 1381, the top of the fixed slot is provided with a second sliding groove matched with the second sliding block 1381, and the second sliding block 1381 is provided with a third reset spring 1382.

The first filter screen 105 is installed in the installation frame 114 and then installed in the second installation groove, so that the connection of the first filter screen 105 is completed. When the mounting frame 114 is in the second mounting groove, the fixing block 137 is inserted into the fixing groove, and the fixing block 137 is matched with the fixing groove to fix the mounting frame 114 in the second mounting groove. When the first filter screen 105 is detached, the lifting handle 1391 is pulled upwards, the lifting handle 1391 drives the fourth push plate 139 to move upwards, the fourth push plate 139 pushes the second push block 138 to move outwards of the fixing groove, and the second push block 138 pushes the fixing block 137 out of the fixing groove so as to directly take the mounting frame 114 out of the second mounting groove.

The second filter screen 106 is mounted in the second water pipe 102 in the same manner as the first filter screen 105 is mounted in the first water pipe 101.

The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims

1. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation is characterized by comprising the following steps of:

2. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation according to claim 1, wherein the photovoltaic output power controller obtains a preset grid-connected power upper limit value, calculates a photovoltaic inverter output power percentage upper limit value based on a PI controller algorithm, and comprises the following steps:

The photovoltaic output power controller calculates the upper limit value of the output power percentage of the photovoltaic inverter according to the formula 1;

plimit 1=u (n) =u (n-1) +kp1× [ E (n) -E (n-1) ]+ki1×e (n) formula 1;

wherein Plimit1 is the upper limit value of the output power percentage of the photovoltaic inverter, n is the serial number of the time node, u (n) is the output value of the PI controller of the photovoltaic output power controller of the current time node, u (n-1) is the output value of the PI controller of the photovoltaic output power controller of the previous time node, E (n) is the error value of the PI controller of the photovoltaic output power controller of the current time node, E (n-1) is the error value of the PI controller of the photovoltaic output power controller of the previous time node, kp1 is a first preset proportional parameter, and Ki1 is a first preset integral parameter;

the error value of the PI controller of the current time node photovoltaic output power controller is the difference value between the preset grid-connected power upper limit value and the current grid-connected port power.

3. The non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation according to claim 2, wherein after the photovoltaic output power controller transmits the upper limit value of the output power percentage of the photovoltaic inverter to each photovoltaic inverter in a broadcast form, each photovoltaic inverter calculates the upper limit value of the output power of each photovoltaic inverter according to formula 2;

Plimit2 (m) =plimit 1×pmax (m) formula 2;

wherein Plimit2 (m) is the upper limit value of the output power of each photovoltaic inverter, plimit1 is the upper limit value of the output power percentage of the photovoltaic inverter, pmax (m) is the maximum allowable output power value of the photovoltaic inverter, and m is the id of the photovoltaic inverter.

4. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation according to claim 3, wherein the regulating the output power of each photovoltaic inverter based on the upper limit value of the output power percentage of the photovoltaic inverter comprises:

each photovoltaic inverter performs the following steps;

the photovoltaic inverter calculates an output power target value of the photovoltaic inverter according to a formula 3;

p3 (m) =w (n-1) +kp2× [ e (n) -e (n-1) ]+ki2×w (n) formula 3;

wherein P3 is the output power target value of the photovoltaic inverter, m is id of the photovoltaic inverter, n is the serial number of the time node, w (n) is the output value of the PI controller in the photovoltaic inverter of the current time node, w (n-1) is the output value of the PI controller in the photovoltaic inverter of the previous time node, e (n) is the error value of the PI controller in the photovoltaic inverter of the current time node, e (n-1) is the error value of the PI controller in the photovoltaic inverter of the previous time node, kp2 is a second preset proportional parameter, and Ki2 is a second preset integral parameter;

The error value of the PI controller in the photovoltaic inverter at the current time node is the difference value between the upper limit value of the output power of the photovoltaic inverter and the output power of the current inverter;

the photovoltaic inverter adjusts the output voltage of the photovoltaic module so that the output power of the photovoltaic inverter reaches the output power target value of the photovoltaic inverter.

5. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation according to claim 4, wherein after the intelligent control cabinet obtains the first sensing data collected by the blockage sensor in the first water pipe and judges whether the first water pipe is blocked, the method further comprises:

if the first water pipe is not blocked, the intelligent control cabinet controls the first water pipe to be opened, and the two second water pipes are closed;

the intelligent control cabinet acquires second sensing data acquired by a blockage sensor in each second water pipe and judges whether any second water pipe is blocked or not;

if any one of the second water pipes is blocked, the intelligent control cabinet performs pollution discharge treatment on the blocked second water pipe.

6. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation according to claim 5, wherein if the first water pipe is blocked, the intelligent control cabinet controls the second water pipe to be opened, controls the first water pipe to be closed, controls the first water pipe to discharge sewage, and performs sewage treatment on the first water pipe while guiding the water flow of the tap water pipe network to the water outlet, comprising:

If the first water pipe is blocked, the intelligent control cabinet acquires second sensing data acquired by a blocking sensor in each second water pipe, and judges whether any second water pipe is not blocked;

if all the second water pipes are not blocked, the intelligent control cabinet controls the second water pipes which are not blocked to be opened, and controls the first water pipes to be closed;

the intelligent control cabinet carries out sewage disposal treatment on the first water conveying pipe.

7. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation according to claim 6, wherein the intelligent control cabinet performs sewage treatment on the first water pipe, comprising:

the intelligent control cabinet controls the water outlet to be opened, and water in the first water pipe passes through the first filter screen and then enters the water storage box through the water outlet;

the intelligent control cabinet controls water flow in the water storage box to be sprayed on the first filter screen;

the intelligent control cabinet controls the first drain to be opened so that water drops sprayed on the first filter screen are discharged from the first drain together with impurities.

8. The method for non-negative pressure laminated water supply and sewage treatment based on photovoltaic power generation according to claim 7, wherein the intelligent control cabinet performs sewage treatment on the blocked second water pipe, and the method comprises the following steps:

The second raceway that the intelligent control cabinet control produced the jam is sealed, and rivers are removed through driving the second push pedal in the first raceway, and first push pedal striking is on the second filter screen, and after the first movable block moved to the bottom from the guide rail again to the top, the second drain was opened to the rivers and the impurity in the second raceway that produced the jam together are discharged from the second drain.

9. The method for non-negative pressure water supply and sewage treatment based on photovoltaic power generation according to claim 8, wherein the intelligent control cabinet controls the pressure stabilizing pump group to adjust the water pressure of the user pipe network side according to the pressure data of the water inlet side pressure sensor and the pressure data of the user side pressure sensor, and comprises the following steps:

judging whether the pressure value of the water inlet side pressure sensor is smaller than a preset pressure value or not;

if the pressure value of the water inlet side pressure sensor is smaller than a preset pressure value, controlling the variable frequency starting and running of an nth stabilized pump so as to supply water for user official network lamination; n is the serial number of the pressure stabilizing pump, and the initial value of n is 1;

monitoring whether the pressure value of the user side pressure sensor is smaller than a preset pressure value in real time;

if the pressure value of the user side pressure sensor is smaller than the preset pressure value, the first pressure stabilizing pump is controlled to be turned into power frequency, the n+1th pressure stabilizing pump is controlled to start and operate in a variable frequency mode, and whether the pressure value of the user side pressure sensor is smaller than the preset pressure value or not is monitored in real time until the pressure value of the user side pressure sensor is equal to the preset pressure value.

10. A non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation, characterized in that the non-negative pressure laminated water supply and sewage treatment method based on photovoltaic power generation according to any one of claims 1 to 9 is applied, and the non-negative pressure laminated water supply and sewage treatment system based on photovoltaic power generation comprises:

a non-negative pressure lamination steady flow tank;

the user pipe network side is provided with a user side pressure sensor;