Pollutant overflowing purification rainwater pipeline with flow direction control and self-purification functions

Abstract

The invention discloses a pollutant overflowing purification rainwater pipeline with flow direction control and self-purification functions, and relates to the technical field of rainwater pipelines. A water opening I and a water opening II of the rainwater branch pipe are communicated with the rainwater main pipe to form a parallel branch pipe structure; an electric control valve I is mounted between the water port I and the water port II on the rainwater main pipe; the purification assembly comprises a filter screen I mounted in the rainwater branch pipe; the blow-off pipe is communicated with the rainwater branch pipe; an electric control valve II is mounted between the corresponding water opening I and the sewage inlet on the rainwater branch pipe; an electric control valve III is mounted on the blow-off pipe; the water level detection and valve control mechanism is connected to the rainwater branch pipe and corresponds to the side, close to the first water opening, of the first filter screen so as to detect the water level in the rainwater branch pipe. The water level detection and valve control mechanism is electrically connected with the first electric control valve, the second electric control valve and the third electric control valve. The rainwater pipeline has the dual functions of transferring rainwater and purifying water.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater pipes, and particularly to a pollutant over-flow purification rainwater pipe with functions of controlling the flow direction and self-purification. Background Art

[0002] Rainwater pipes are important facilities for carrying rainwater transfer; during rainfall, rainwater often washes away gasoline, engine oil, heavy metals, garbage and other pollutants from roads and parking lots, as well as chemical fertilizers and pesticides from lawns, and discharges them into water bodies through rainwater pipes. Existing rainwater pipes generally only consider the transfer of rainwater and cannot adsorb and purify pollutants such as suspended solids in rainwater, resulting in deterioration of the water quality of the receiving water bodies.

[0003] Therefore, how to provide a pollutant over-flow purification rainwater pipe with functions of controlling the flow direction and self-purification, which can be arranged between the rainwater inlet and the receiving water body and the sewage treatment plant, realize water quality purification in the rainwater pipe without affecting normal rainwater discharge, and does not require manual dredging and has the characteristics of stable operation is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a pollutant over-flow purification rainwater pipe with functions of controlling the flow direction and self-purification, aiming to solve the technical problem that the traditional rainwater pipe only transfers rainwater and cannot purify water quality.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a pollutant over-flow purification rainwater pipe with functions of controlling the flow direction and self-purification, comprising:

[0007] A main rainwater pipe; one end of the main rainwater pipe is an inlet connected to the ground rainwater inlet, and the other end is a drain outlet;

[0008] Rainwater branch pipes, one end of each rainwater branch pipe is a water inlet one, and the other end is a water inlet two; both the water inlet one and the water inlet two are connected to the main rainwater pipe and are arranged in sequence along the water conveyance direction of the main rainwater pipe to form a parallel branch pipe structure; an electric control valve one is installed on the main rainwater pipe corresponding to the section between the water inlet one and the water inlet two;

[0009] A purification component, the purification component includes a filter screen one installed in the rainwater branch pipes;

[0010] A sewage pipe, the sewage inlet of the sewage pipe is connected to the rainwater branch pipe and corresponds to the section between the water inlet one and the filter screen one, and the sewage outlet of the sewage pipe is connected to the sewage pipe; an electric control valve two is installed on the rainwater branch pipe corresponding to the section between the water inlet one and the sewage inlet; an electric control valve three is installed on the sewage pipe;

[0011] A water level detection and valve control mechanism, which is connected to the rainwater branch pipe and corresponds to the side of the first filter screen close to the first water inlet, so as to judge the blockage state of the first filter screen by detecting the water level in the rainwater branch pipe; the water level detection and valve control mechanism is electrically connected to the first electric control valve, the second electric control valve and the third electric control valve to control the opening and closing of the first electric control valve, the second electric control valve and the third electric control valve.

[0012] The rainwater pipeline for purifying pollutants by passing through the current of the present invention has two working states, namely, the normal unblocked purification state and the state of siltation and backwashing of pollutants. In the normal unblocked purification state, there is no blockage or less blockage at the front end of the first filter screen, and the water level in the rainwater branch pipe corresponding to the front end of the first filter screen is relatively low. The water level detection and valve control mechanism controls the first electric control valve and the third electric control valve to close and the second electric control valve to open, so that the rainwater entering the rainwater main pipe is diverted from the first water inlet to the rainwater branch pipe and filtered by the first filter screen to intercept pollutants for rainwater purification; as more and more pollutants are intercepted at the front end of the first filter screen and siltation and blockage occur, the water level in the rainwater branch pipe corresponding to the front end of the first filter screen will also become higher and higher. After the water level detection and valve control mechanism detects that the water level has risen to a certain position, it controls the first electric control valve and the third electric control valve to open and the second electric control valve to close, and switches to the state of siltation and backwashing of pollutants. In the state of siltation and backwashing of pollutants, the first water inlet is in the closed state, the sewage pipe is in the open state, the rainwater entering the rainwater main pipe is diverted from the second water inlet to the rainwater branch pipe and reversely flushes the pollutants blocked on the first filter screen, and then the pollutants blocked and silted at the front end on the first filter screen are discharged into the sewage pipe through the sewage pipe, thereby restoring the filtering function of the first filter screen. The present invention does not require manual dredging, and there is no electric power driving power facility in the pipeline, ensuring the stability during operation, improving the water quality without affecting the normal rainwater discharge, and realizing the dual functions of the rainwater pipeline for transporting rainwater and purifying water quality.

[0013] As a further improvement of the above technical solution, the water level detection and valve control mechanism includes a water level detection component and a controller;

[0014] The water level detection component is connected to the rainwater branch pipe and corresponds to the position between the first filter screen and the second electric control valve, and is electrically connected to the controller to transmit the detected water level signal in the rainwater branch pipe to the controller; the controller is electrically connected to the first electric control valve, the second electric control valve and the third electric control valve to control the opening and closing of the first electric control valve, the second electric control valve and the third electric control valve.

[0015] The beneficial effects of the above technical solution are as follows: The water level detection component is used to detect the water level at the front end of the first filter screen in the rainwater branch pipe and transmit the water level signal to the controller. The controller controls the opening states of the first electric control valve, the second electric control valve, and the third electric control valve according to the water level signal, so that the rainwater pipe is in a normal unobstructed purification state or a state of siltation and backwashing of pollutants.

[0016] As a further improvement of the above technical solution, the water level detection component includes a cylinder body, a piston rod, a floating ball, and a pressure sensor;

[0017] The lower end of the cylinder body is open and communicates with the top of the rainwater branch pipe and corresponds to the position between the first filter screen and the second electric control valve; the pressure sensor is installed at the inner top of the cylinder body; one end of the piston rod slides through the inner cavity of the cylinder body; the floating ball is located inside the rainwater branch pipe and is fixedly connected to the other end of the piston rod, so as to drive the piston rod to rise and press against the pressure sensor to generate a pressure electrical signal when the water level in the rainwater branch pipe rises; the pressure sensor is electrically connected to the controller to transmit the pressure electrical signal to the controller.

[0018] The beneficial effects of the above technical solution are as follows: After the first filter screen is blocked and pollutants are deposited at the front end, the water flow is blocked, and the water level at the front end of the first filter screen in the rainwater branch pipe will rise. Under the action of buoyancy, the floating ball floats up and pushes the piston rod to rise. When the piston rod rises to its top and abuts against the pressure sensor, the pressure sensor can transmit a pressure electrical signal to the controller; the larger the volume of the rainwater submerging the floating ball, the greater the buoyancy force on the floating ball, the greater the pressing force of the piston rod on the pressure sensor, and the stronger the pressure electrical signal. When the pressure electrical signal reaches a certain threshold value, that is, when the water surface at the front end of the first filter screen rises to a certain water level, at this time, the rainwater flow-through capacity of the first filter screen is significantly weakened, and the controller switches the opening and closing states of the first electric control valve, the second electric control valve, and the third electric control valve, so that the rainwater pipe is switched from the normal unobstructed purification state to the state of siltation and backwashing of pollutants.

[0019] As a further improvement of the above technical solution, the controller is set with an upper limit pressure threshold; when the pressure electrical signal received by the controller is lower than the set upper limit pressure threshold, the controller controls the first electric control valve and the third electric control valve to close and controls the second electric control valve to open, so as to divert the rainwater entering the rainwater main pipe from the water inlet to the rainwater branch pipe through the water inlet 1 and filter and intercept pollutants through the first filter screen; when the pressure electrical signal received by the controller reaches the set upper limit pressure threshold, the controller controls the first electric control valve and the third electric control valve to open and controls the second electric control valve to close, so as to divert the rainwater entering the rainwater main pipe from the water inlet to the rainwater branch pipe through the water inlet 2 and reverse flush the pollutants blocked and deposited at the front end of the first filter screen, and then discharge the pollutants through the sewage pipe.

[0020] The beneficial effects of the above technical solution are as follows: During actual application, the upper pressure threshold value set by the controller should be debugged and determined according to the pipe diameter of the rainwater branch pipe, the density and volume of the floating ball, and the model and specifications of the pressure sensor, so that the set upper pressure threshold value can ensure that the fullness of the rainwater branch pipe in front of the first filter is less than 100%, avoiding the phenomenon of water blockage in the rainwater pipe.

[0021] As a further improvement of the above technical solution, after the pressure electrical signal received by the controller reaches the set upper pressure threshold value, the controller controls the first electric control valve and the third electric control valve to open and controls the second electric control valve to close for a preset time period, thereby controlling the backwashing time of the filter.

[0022] The beneficial effects of the above technical solution are as follows: By controlling the opening of the first electric control valve and the third electric control valve and controlling the second electric control valve to close for a preset time period, the controller realizes the setting of the flushing time of the first filter, ensuring that the first filter is washed clean and its filtering ability is restored.

[0023] As a further improvement of the above technical solution, when the pressure electrical signal received by the controller reaches the set upper pressure threshold value, the fullness of the rainwater at the position of the floating ball in the rainwater branch pipe is not less than 80%.

[0024] The beneficial effects of the above technical solution are as follows: The setting of the upper pressure threshold value corresponds to a rainwater fullness in the rainwater branch pipe of not less than 80%, so as to give full play to the filtering ability of the first filter.

[0025] As a further improvement of the above technical solution, the cylinder body has the same material as the rainwater branch pipe.

[0026] The beneficial effects of the above technical solution are as follows: The cylinder body and the rainwater branch pipe having the same material facilitate their welded sealing, bonded sealing or fused sealing connection.

[0027] As a further improvement of the above technical solution, the purification component further includes a second filter; the second filter is installed between the first filter and the sewage inlet; the mesh number of the first filter is greater than that of the second filter;

[0028] The floating ball is located between the first filter and the second filter, and the cylinder body is arranged corresponding to the position between the first filter and the second filter.

[0029] The beneficial effects of the above technical solution are as follows: The second filter plays a role in roughly filtering the rainwater, protecting the internal floating ball from being impacted and blocked by larger debris; the first filter further finely filters the rainwater, improving the purification effect.

[0030] As a further improvement of the above technical solution, the mesh aperture of the first filter is 1 mm, and the mesh aperture of the second filter is 10 mm.

[0031] As a further improvement of the above technical solution, the slope of the rainwater branch pipe is greater than that of the rainwater main pipe.

[0032] The beneficial effect of the above technical solution is that the slope of the rainwater branch pipe is greater than that of the rainwater main pipe, which can accelerate the flow rate of the rainwater entering the rainwater branch pipe from the second water inlet and improve the backwashing effect on the first filter screen.

[0033] It can be seen from the above technical solution that compared with the prior art, the present invention discloses a pollutant over-flow purification rainwater pipe with the functions of controlling the flow direction and self-purification, and has the following advantages and beneficial effects:

[0034] 1. The pollutant over-flow purification rainwater pipe with the functions of controlling the flow direction and self-purification of the present invention does not require manual dredging, and there are no electric power facilities in the pipe, ensuring the stability and reliability during operation; while improving the quality of the received rainwater, it does not affect the normal rainwater discharge.

[0035] 2. The present invention uses the rising height of the floating ball in the rainwater branch pipe to judge the siltation condition of the first filter screen, as the basis for the controller to judge whether to start the filter screen backwashing operation, and realizes the dual functions of rainwater purification and rainwater discharge of the rainwater pipe by combining the parallel structure of the rainwater branch pipe and the rainwater main pipe and the reasonable arrangement of multiple electric control valves and the sewage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0037] Figure 1 Schematic diagram of the overall structure of a pollutant over-flow purification rainwater pipe with the functions of controlling the flow direction and self-purification of the present invention during normal unobstructed purification;

[0038] Figure 2 Schematic diagram of the structure of a pollutant over-flow purification rainwater pipe with the functions of controlling the flow direction and self-purification of the present invention when silt is backwashed and pollutants are removed;

[0039] Figure 3 Schematic diagram of the state of the floating ball in the rainwater branch pipe of a pollutant over-flow purification rainwater pipe with the functions of controlling the flow direction and self-purification of the present invention at a low position and the piston rod disengaging from the pressure sensor during normal unobstructed purification;

[0040] Figure 4Schematic diagram of the state where the float ball in the rainwater branch pipe is at a high position and the piston rod presses against the pressure sensor when the pollutant - passing and purifying rainwater pipe with functions of controlling the flow direction and self - purification of the present invention accumulates and backwashes pollutants;

[0041] Figure 5 Another perspective schematic diagram of the state where the float ball and the piston rod of the pollutant - passing and purifying rainwater pipe with functions of controlling the flow direction and self - purification of the present invention are at a low position;

[0042] Figure 6 Another perspective schematic diagram of the state where the float ball and the piston rod of the pollutant - passing and purifying rainwater pipe with functions of controlling the flow direction and self - purification of the present invention are at a high position;

[0043] In the figure: 1. Rainwater main pipe; 11. Electric control valve 1; 2. Rainwater branch pipe; 21. Water inlet 1; 22. Water inlet 2; 23. Electric control valve 2; 3. Purification component; 31. Filter screen 1; 32. Filter screen 2; 4. Sewage pipe; 41. Sewage inlet; 42. Electric control valve 3; 5. Water level detection and valve control mechanism; 51. Water level detection component; 511. Cylinder body; 512. Piston rod; 513. Float ball; 514. Pressure sensor. Detailed implementation manners

[0044] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the drawings below are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically and clearly defined.

[0047] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] As Figures 1 to 6 shown, a pollutant-flow-through purification rainwater pipe with a function of controlling the flow direction and self-purification includes:

[0049] A rainwater main pipe 1; one end of the rainwater main pipe 1 is an inlet connected to the ground rainwater inlet, and the other end is a drain outlet;

[0050] A rainwater branch pipe 2, one end of the rainwater branch pipe 2 is a water inlet 21, and the other end is a water outlet 22; both the water inlet 21 and the water outlet 22 are connected to the rainwater main pipe 1 and are arranged in sequence along the water conveyance direction of the rainwater main pipe 1 to form a parallel branch pipe structure; an electric control valve 11 is installed on the rainwater main pipe 1 corresponding to the interval between the water inlet 21 and the water outlet 22;

[0051] A purification assembly 3, the purification assembly 3 includes a filter screen 31 installed in the rainwater branch pipe 2;

[0052] A sewage pipe 4, the sewage inlet 41 of the sewage pipe 4 is connected to the rainwater branch pipe 2 and corresponds to the interval between the water inlet 21 and the filter screen 31, and the sewage outlet of the sewage pipe 4 is connected to the sewage pipe; an electric control valve 23 is installed on the rainwater branch pipe 2 corresponding to the interval between the water inlet 21 and the sewage inlet 41; an electric control valve 42 is installed on the sewage pipe 4;

[0053] A water level detection and valve control mechanism 5, the water level detection and valve control mechanism 5 is connected to the rainwater branch pipe 2 and corresponds to the side of the filter screen 31 close to the water inlet 21 to judge the clogging state of the filter screen 31 by detecting the water level in the rainwater branch pipe 2; the water level detection and valve control mechanism 5 is electrically connected to the electric control valve 11, the electric control valve 23 and the electric control valve 42 to control the opening and closing of the electric control valve 11, the electric control valve 23 and the electric control valve 42.

[0054] The pollutant-flow-through purification rainwater pipe of this embodiment has two working states, namely, a normal unobstructed purification state and a state of siltation and backwashing of pollutants. See Figure 1, in the normal unobstructed purification state, there is no blockage or less blockage at the front end of the first filter screen 31. The water level in the rainwater branch pipe 2 corresponding to the front end of the first filter screen 31 is relatively low. The water level detection and valve control mechanism 5 controls the first electric control valve 11 and the third electric control valve 42 to close, and controls the second electric control valve 23 to open, so that the rainwater entering the rainwater main pipe 1 is diverted from the first water inlet 21 to the rainwater branch pipe 2 and the pollutants are filtered and intercepted by the first filter screen 31 for rainwater purification. As more and more pollutants are intercepted at the front end of the first filter screen 31 and siltation and blockage occur, the water level in the rainwater branch pipe 2 corresponding to the front end of the first filter screen 31 will also become higher and higher. After the water level detection and valve control mechanism 5 detects that the water level has risen to a certain position, it controls the first electric control valve 11 and the third electric control valve 42 to open and controls the second electric control valve 23 to close, switching to the state of siltation backwashing pollutants. See Figure 2 , in the state of siltation backwashing pollutants, the first water inlet 21 is in the closed state, the sewage pipe 4 is in the open state, the rainwater entering the rainwater main pipe 1 is diverted from the second water inlet 22 to the rainwater branch pipe 2 and reversely flushes the pollutants blocked on the first filter screen 31. Then, the pollutants blocked and silted at the front end on the first filter screen 31 are discharged into the municipal sewage pipe through the sewage pipe 4, and then the filtering function of the first filter screen 31 is restored. The present invention does not require manual dredging, and there is no electric drive power facility in the pipeline, ensuring the stability during operation, improving the water quality without affecting the normal rainwater discharge, realizing the dual functions of rainwater pipeline transporting rainwater and purifying water quality, so as to improve the utilization value of rainwater.

[0055] In some embodiments, the water level detection and valve control mechanism 5 includes a water level detection component 51 and a controller;

[0056] The water level detection component 51 is connected to the rainwater branch pipe 2 and corresponds to between the first filter screen 31 and the second electric control valve 23, and is electrically connected to the controller to transmit the detected water level signal in the rainwater branch pipe 2 to the controller; the controller is electrically connected to the first electric control valve 11, the second electric control valve 23 and the third electric control valve 42 to control the opening and closing of the first electric control valve 11, the second electric control valve 23 and the third electric control valve 42.

[0057] The water level detection component 51 is used to detect the water level at the front end of the first filter screen 31 in the rainwater branch pipe 2 and transmit the water level signal to the controller. The controller controls the opening states of the first electric control valve 11, the second electric control valve 23 and the third electric control valve 42 according to the water level signal, so that the rainwater pipeline is in the normal unobstructed purification state or the state of siltation backwashing pollutants.

[0058] Specifically, the controller is a PLC controller with a single-chip microcomputer as the core, which can generate control signals to drive the actuators (i.e., the first electric control valve 11, the second electric control valve 23 and the third electric control valve 42) to operate.

[0059] In some embodiments, the water level detection component 51 includes a cylinder block 511, a piston rod 512, a floating ball 513, and a pressure sensor 514;

[0060] The lower end of the cylinder block 511 is open and communicates with the top of the rainwater branch pipe 2 and corresponds to the position between the first filter screen 31 and the second electric control valve 23; the pressure sensor 514 is installed at the inner top of the cylinder block 511; one end of the piston rod 512 slides through the inner cavity of the cylinder block 511; the floating ball 513 is located inside the rainwater branch pipe 2 and is fixedly connected to the other end of the piston rod 512, so as to drive the piston rod 512 to rise and press against the pressure sensor 514 to generate a pressure electrical signal when the water level in the rainwater branch pipe 2 rises; the pressure sensor 514 is electrically connected to the controller to transmit the pressure electrical signal to the controller.

[0061] After pollutants accumulate at the front end of the first filter screen 31, the water flow is blocked, and the water level at the front end of the first filter screen 31 in the rainwater branch pipe 2 will rise. Under the action of buoyancy, the floating ball 513 floats up and pushes the piston rod 512 to rise. When the piston rod 512 rises to its top and abuts against the pressure sensor 514, the pressure sensor 514 can transmit a pressure electrical signal to the controller; the larger the volume of the rainwater submerging the floating ball 513, the greater the buoyancy force on the floating ball 513, the greater the pressing force of the piston rod 512 on the pressure sensor 514, and the stronger the pressure electrical signal. When the pressure electrical signal reaches a certain threshold value, that is, when the water surface at the front end of the first filter screen 31 rises to a certain water level, at this time, the rainwater passing capacity of the first filter screen 31 is significantly weakened, and the controller switches the opening and closing states of the first electric control valve 11, the second electric control valve 23, and the third electric control valve 42, so as to switch the rainwater pipeline from the normal unobstructed purification state to the state of silt flushing and pollutant backwashing.

[0062] In some embodiments, the controller is set with an upper pressure threshold value; when the pressure electrical signal received by the controller is lower than the set upper pressure threshold value, the controller controls the first electric control valve 11 and the third electric control valve 42 to close and controls the second electric control valve 23 to open, so as to divert the rainwater entering the rainwater main pipe 1 from the water inlet to the rainwater branch pipe 2 through the first filter screen 31 to filter and intercept pollutants; when the pressure electrical signal received by the controller reaches the set upper pressure threshold value, the controller controls the first electric control valve 11 and the third electric control valve 42 to open and controls the second electric control valve 23 to close, so as to divert the rainwater entering the rainwater main pipe 1 from the water inlet to the rainwater branch pipe 2 and reversely flush the pollutants blocked and accumulated at the front end of the first filter screen 31, and then discharge the pollutants through the sewage pipe 4.

[0063] In actual application, the upper pressure threshold value set by the controller should be debugged and determined according to the pipe diameter of the rainwater branch pipe, the density and volume of the floating ball 513, and the model and specifications of the pressure sensor 514, so that the set upper pressure threshold value can ensure that the filling degree of the rainwater branch pipe 2 at the front end of the first filter screen 31 is less than 100%, and avoid the phenomenon of water blockage in the rainwater pipeline.

[0064] In some embodiments, after the pressure electrical signal received by the controller reaches the set upper limit pressure threshold, the controller controls the opening of the first electric control valve 11 and the third electric control valve 42 and the closing of the second electric control valve 23 for a preset duration, thereby controlling the backwashing duration of the filter screen.

[0065] By controlling the opening of the first electric control valve 11 and the third electric control valve 42 and the closing of the second electric control valve 23 for a preset duration, the controller sets the time for flushing the first filter screen 31 to ensure that the first filter screen 31 is flushed clean and its filtering ability is restored.

[0066] Specifically, the preset duration is 30 min, that is, the backwashing duration of the first filter screen 31 is controlled to be 30 min.

[0067] In some embodiments, when the pressure electrical signal received by the controller reaches the set upper limit pressure threshold, the rainwater fullness at the position of the floating ball 513 corresponding to the rainwater branch pipe 2 is not less than 80%, and the upper surface of the rainwater at the position of the floating ball 513 corresponding to the rainwater branch pipe 2 corresponds to the middle position of the floating ball 513 up and down. See Figure 5 , at this time, the water level of the rainwater branch pipe 2 is not sufficient to cause the floating ball 513 and the piston rod 512 to rise; see Figure 6 , at this time, the water level of the rainwater branch pipe 2 reaches the middle position of the floating ball 513, that is, the water level line and the center of the floating ball 513 are at the same horizontal height.

[0068] The set value of the upper limit pressure threshold corresponds to a rainwater fullness of the rainwater branch pipe 2 of not less than 80% to give full play to the filtering ability of the first filter screen 31.

[0069] Specifically, according to the pipe diameter of the rainwater pipe and the different pipe diameters of the main rainwater pipe 1 and the rainwater branch pipe 2, different sizes of the floating ball 513 and the piston rod 512 are combined to ensure the smooth switching from the normal unobstructed purification state to the state of backwashing pollutants in case of siltation when the fullness reaches 80%. For example: for a rainwater branch pipe 2 with a pipe diameter of 1000 mm, a floating ball 513 with a diameter of 400 mm is provided. When the fullness reaches 80%, that is, when the rainwater submerges to the position of half the volume of the floating ball 513, the buoyancy provided can reach 1313.2 N. Detection is carried out through a pressure sensor to ensure the smooth switching from the normal unobstructed purification state to the state of backwashing pollutants in case of siltation.

[0070] In some embodiments, the cylinder block 511 and the rainwater branch pipe 2 are made of the same material.

[0071] The cylinder block 511 and the rainwater branch pipe 2 being made of the same material facilitates their welded sealing, bonded sealing, or fused sealing connection.

[0072] Specifically, the piston rod 512 and the floating ball 513 are fixedly connected by bolts, and a hole is opened on the rainwater branch pipe 2 to embed the cylinder block 511. If the rainwater branch pipe 2 is made of steel pipe or cast iron pipe, the cylinder block 511 is also made of steel pipe or cast iron pipe, and the cylinder block 511 and the rainwater branch pipe 2 are fixedly connected by welding. If the rainwater branch pipe is made of PVC pipe or PE pipe, the cylinder block 511 is also made of PVC pipe or PE pipe, and the cylinder block 511 and the rainwater branch pipe 2 can be fixedly connected by bonding or fusion welding, or the cylinder block 511 and the rainwater branch pipe with an integrally connected structure can be obtained through customization.

[0073] In some embodiments, the purification component 3 further includes a second filter screen 32; the second filter screen 32 is installed between the first filter screen 31 and the sewage inlet 41; the mesh number of the first filter screen 31 is greater than that of the second filter screen 32;

[0074] The floating ball 513 is located between the first filter screen 31 and the second filter screen 32, and the cylinder block 511 is arranged corresponding to the position between the first filter screen 31 and the second filter screen 32.

[0075] The second filter screen 32 plays a role in coarsely filtering the rainwater, which can protect the internal floating ball 513 from being impacted and blocked by larger sundries; the first filter screen 31 further finely filters the rainwater to improve the purification effect; in the state of silt backwashing pollutants, the sundries such as the pollutants blocked on the first filter screen 31 and the second filter screen 32 and the silt deposited at the front end are all washed into the sewage pipe 4 and discharged.

[0076] In some embodiments, the mesh aperture of the first filter screen 31 is 1 mm, and the mesh aperture of the second filter screen 32 is 10 mm.

[0077] In some embodiments, the slope of the rainwater branch pipe 2 is greater than that of the rainwater main pipe 1.

[0078] The slope of the rainwater branch pipe 2 being greater than that of the rainwater main pipe 1 can accelerate the flow rate of the rainwater entering the rainwater branch pipe 2 from the second water inlet 22, and improve the backwashing effect on the first filter screen 31.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A pollutant-flow-through and self-purifying rainwater pipe with the function of controlling the flow direction, characterized in that, Including: A main rainwater pipe (1); one end of the main rainwater pipe (1) is an inlet connected to a ground rainwater inlet, and the other end is a drain outlet; A rainwater branch pipe (2), one end of the rainwater branch pipe (2) is a water inlet one (21), and the other end is a water inlet two (22); both the water inlet one (21) and the water inlet two (22) are connected to the main rainwater pipe (1) and are arranged in sequence along the water conveyance direction of the main rainwater pipe (1) to form a parallel branch pipe structure; an electric control valve one (11) is installed on the main rainwater pipe (1) corresponding to the position between the water inlet one (21) and the water inlet two (22); A purification component (3), the purification component (3) includes a filter screen one (31) installed in the rainwater branch pipe (2); A sewage pipe (4), a sewage inlet (41) of the sewage pipe (4) is connected to the rainwater branch pipe (2) and corresponds to the position between the water inlet one (21) and the filter screen one (31), and a sewage outlet of the sewage pipe (4) is connected to a sewage pipe; an electric control valve two (23) is installed on the rainwater branch pipe (2) corresponding to the position between the water inlet one (21) and the sewage inlet (41); an electric control valve three (42) is installed on the sewage pipe (4); A water level detection and valve control mechanism (5), the water level detection and valve control mechanism (5) is connected to the rainwater branch pipe (2) and corresponds to the side of the filter screen one (31) close to the water inlet one (21) to judge the blockage state of the filter screen one (31) by detecting the water level height in the rainwater branch pipe (2); the water level detection and valve control mechanism (5) is electrically connected to the electric control valve one (11), the electric control valve two (23) and the electric control valve three (42) to control the opening and closing of the electric control valve one (11), the electric control valve two (23) and the electric control valve three (42).

2. The pollutant-flow-through and self-purifying rainwater pipeline with the functions of controlling the flow direction and self-purification according to claim 1, wherein The water level detection and valve control mechanism (5) includes a water level detection component (51) and a controller; The water level detection component (51) is connected to the rainwater branch pipe (2) and corresponds to the position between the filter screen one (31) and the electric control valve two (23), and is electrically connected to the controller to transmit the detected water level signal in the rainwater branch pipe (2) to the controller; the controller is electrically connected to the electric control valve one (11), the electric control valve two (23) and the electric control valve three (42) to control the opening and closing of the electric control valve one (11), the electric control valve two (23) and the electric control valve three (42).

3. The pollutant-flow-through and purifying rainwater pipeline with the functions of controlling the flow direction and self-purification according to claim 2, wherein The water level detection component (51) includes a cylinder body (511), a piston rod (512), a floating ball (513) and a pressure sensor (514); The lower end of the cylinder block (511) is open and communicates with the top of the rainwater branch pipe (2) and corresponds to the position between the first filter screen (31) and the second electric control valve (23); the pressure sensor (514) is installed at the inner top of the cylinder block (511); one end of the piston rod (512) slides through the inner cavity of the cylinder block (511); the floating ball (513) is located inside the rainwater branch pipe (2) and is fixedly connected to the other end of the piston rod (512), so as to drive the piston rod (512) to rise and press against the pressure sensor (514) to generate a pressure electrical signal when the water level in the rainwater branch pipe (2) rises; the pressure sensor (514) is electrically connected to the controller to transmit the pressure electrical signal to the controller.

4. The pollutant-flow-through and purifying rainwater pipeline with the functions of controlling the flow direction and self-purification according to claim 3, characterized in that, The controller is set with an upper limit pressure threshold; when the pressure electrical signal received by the controller is lower than the set upper limit pressure threshold, it controls the first electric control valve (11) and the third electric control valve (42) to close and controls the second electric control valve (23) to open, so as to divert the rainwater entering the rainwater main pipe (1) from the water inlet to the rainwater branch pipe (2) through the first filter screen (31) to filter and intercept pollutants; when the pressure electrical signal received by the controller reaches the set upper limit pressure threshold, it controls the first electric control valve (11) and the third electric control valve (42) to open and controls the second electric control valve (23) to close, so as to divert the rainwater entering the rainwater main pipe (1) from the water inlet to the rainwater branch pipe (2) and reversely flush the pollutants blocked on the first filter screen (31), and then discharge the pollutants through the sewage pipe (4).

5. The pollutant-flow-through and rainwater pipe with the functions of controlling the flow direction and self-purification according to claim 4, wherein, When the pressure electrical signal received by the controller reaches the set upper limit pressure threshold, it controls the first electric control valve (11) and the third electric control valve (42) to open and controls the second electric control valve (23) to close for a preset duration, so as to control the filter screen reverse cleaning duration.

6. The pollutant-flow-through rainwater pipe with the functions of controlling the flow direction and self-purification according to claim 4, wherein When the pressure electrical signal received by the controller reaches the set upper limit pressure threshold, the rainwater fullness at the position of the floating ball (513) in the rainwater branch pipe (2) is not less than 80%.

7. The pollutant-flow-through and rainwater purifying pipeline with the functions of controlling the flow direction and self-purification according to claim 3, characterized in that, The cylinder block (511) and the rainwater branch pipe (2) are made of the same material.

8. The pollutant-flow-through purifying rainwater pipe with the functions of controlling the flow direction and self-purification according to claim 3, wherein, The purification assembly (3) further includes a second filter screen (32); the second filter screen (32) is installed between the first filter screen (31) and the sewage inlet (41); the mesh number of the first filter screen (31) is greater than the mesh number of the second filter screen (32). The floating ball (513) is located between the first filter screen (31) and the second filter screen (32), and the cylinder block (511) is arranged corresponding to the position between the first filter screen (31) and the second filter screen (32).

9. The pollutant-flow-through and rainwater purifying pipeline with the functions of controlling the flow direction and self-purification according to claim 8, characterized in that, The mesh aperture of the first filter screen (31) is 1 mm, and the mesh aperture of the second filter screen (32) is 10 mm.

10. The pollutant-flow-through and purifying rainwater pipeline with the functions of controlling the flow direction and self-purification according to claim 1, characterized in that, The slope of the rainwater branch pipe (2) is greater than the slope of the rainwater main pipe (1).

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