A rainwater collection and reuse device for urban and rural planning

Abstract

The present invention relates to the technical field of rainwater recycling, and particularly relates to a rainwater collection and reuse device for urban and rural planning, which includes a sedimentation tank, a filtration tank, a slag collection net bag and a water storage tank. One side of the top of the filtration tank is connected to the water outlet of the sedimentation tank, and an overflow channel is provided on the other side, and a filter screen plate and a slag blocking net plate are adapted; one side of the filter screen plate and one side of the slag blocking net plate are hinged to the corresponding side walls of the filtration tank, and the other side of the slag blocking net plate is slidably connected to the filter screen plate, and the side where the slag blocking net plate is slidably connected to the filter screen plate is located below the slag blocking net plate; a counterweight baffle is arranged in the filtration tank, the middle of the counterweight baffle is connected to the slag blocking net plate through a connecting rope, and the counterweight baffle can move up and down in the filtration tank, and the opening and closing of the top opening of the filtration tank can be realized through the movement of the counterweight baffle; an overflow container is arranged in the slag collection net bag, the overflow container can collect the water discharged from the overflow channel, and the overflow container is connected to the filter screen plate through a connecting rod. The present invention can avoid the blockage of the rainwater collection device.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater recycling, and specifically relates to a rainwater collection and reuse device for urban and rural planning. Background Art

[0002] Urban and rural planning refers to the overall arrangement of urban planning, rural transportation, residential fire protection, greening, production and living environment construction, development space layout, improvement of taste, reasonable and economical use of natural resources, and protection of the ecological and natural environment. Among them, in order to save water resources, rainwater collection ponds, collection devices, roof collection ponds, etc. are mostly designed in urban and rural planning to collect and store rainwater.

[0003] Among them, for the rainwater collected from the roof, since it has less debris and silt, it can be used only after simple filtration, and the filter has a long service life. However, for the rainwater collection ponds or other rainwater collection systems built in the drainage system, due to more dead branches, weeds, and sediment, it is easy to block the filter components and accumulate a large amount of sediment, and it is difficult to detect the blockage of the filter components in time, so it is impossible to ensure the effective collection of rainwater. Summary of the Invention

[0004] Aiming at the technical problem that the filter components of the existing rainwater collection and reuse device for urban and rural planning are easy to be blocked; the present invention provides a rainwater collection and reuse device for urban and rural planning, which can automatically remove the debris mixed in the rainwater to avoid the blockage of the filter components, thereby ensuring the effective collection of rainwater.

[0005] The present invention is realized by the following technical solutions:

[0006] The present invention provides a rainwater collection and reuse device for urban and rural planning, including a sedimentation tank, a filtration tank, a slag collection net bag, and a water storage tank. The water storage tank is used to collect the clear water flowing out of the filtration tank. On both sides of the upper end of the sedimentation tank, a rainwater inlet and a rainwater outlet are respectively provided. The rainwater inlet is used to be connected to a rainwater channel. One side of the filtration tank along the length direction of the top is connected to the rainwater outlet, and an overflow channel is provided on the other side. The top of the filtration tank is fitted with a filter screen plate and a slag blocking net plate. One side of the filter screen plate is hinged to the side of the filtration tank where the overflow channel is provided, and one side of the slag blocking net plate is hinged to the other side of the filtration tank. The other side of the slag blocking net plate is slidably connected to the filter screen plate, and the side where the slag blocking net plate is slidably connected to the filter screen plate is located below the slag blocking net plate. A counterweight baffle is arranged in the filtration tank. The middle of the counterweight baffle is connected to the slag blocking net plate through a connecting rope, and the counterweight baffle can move up and down in the filtration tank. By moving the counterweight baffle, the opening at the top of the filtration tank can be opened and closed. An overflow container is arranged in the slag collection net bag. The overflow container can collect the water discharged from the overflow channel. The overflow container is connected to the filter screen plate through a connecting rod. Among them, when the overflow container is filled with water, the filter screen plate and the slag blocking net plate tilt upwards, and the counterweight baffle closes the opening at the top of the filtration tank. When the overflow container moves to the lower limit position, the water contained in it can be emptied.

[0007] For the rainwater collection and reuse device for urban and rural planning provided by the present invention, one side of the filtration tank along the length direction of the top is connected to the rainwater outlet of the sedimentation tank. After the sediment in the rainwater is deposited by the sedimentation tank, the rainwater is discharged to the top of the filtration tank. At the same time, the top of the filtration tank is fitted with a filter screen plate and a slag blocking net plate, and an overflow channel is provided on the other side. Under normal circumstances, the rainwater after sedimentation treatment flows through the filter screen plate, and the floating garbage or other sundries in the rainwater are blocked at the top of the filtration tank by the filter baffle. The rainwater filtered by the filter screen plate then flows through the filter screen plate and the slag blocking net plate into the filtration tank and then into the water storage tank for collection. As the sundries accumulate on the filter screen plate, the flow capacity of the filter screen plate decreases, causing the rainwater to directly flow through the overflow channel to the slag collection net bag. At this time, the sundries carried by the rainwater are collected by the slag collection net bag. An overflow container is arranged in the slag collection net bag, and part of the rainwater is discharged and part flows into the overflow container. As the amount of rainwater in the overflow container increases, the weight of the overflow container increases.

[0008] Among them, one side of the filter screen plate is hinged to one side of the flow groove set in the filter pool, one side of the slag blocking screen plate is hinged to the other side of the filter pool, the other side of the slag blocking screen plate is slidably connected to the filter screen plate, the side where the slag blocking screen plate is slidably connected to the filter screen plate is located at the lower side of the slag blocking screen plate, the middle part of the counterweight baffle in the filter pool is connected to the slag blocking screen plate through a connecting rope, and the flow container is connected to the filter screen plate through a connecting rod. Therefore, when the weight of the filter container acts on the filter screen plate through the lever principle, the force is greater than the sum of the gravity of the filter screen plate, the gravity of the slag blocking screen plate, the resistance of the slag blocking screen plate when sliding and the resistance of the counterweight baffle to move up, the filter container moves down and the filter screen plate rises. It is tilted towards the slag collecting net bag, the slag blocking mesh plate is tilted upward and towards the water inlet side of the filter pool, the counterweight baffle moves up and closes the opening of the filter pool. At this time, some debris filtered on the filter mesh plate rolls into the slag collecting net bag under the action of gravity, and the subsequent rainwater flows through the slag blocking mesh plate first, and then directly flows through the filter mesh plate from the upper surface of the counterweight baffle and then flows to the slag collecting net bag, thereby blocking the debris in the rainwater on the water inlet side of the filter pool through the slag blocking mesh plate, and the rainwater flowing through the filter mesh plate can backwash the filter mesh plate. After the water in the flow container is discharged, it returns to the normal collection state under the action of the deadweight of the counterweight baffle, the filter mesh plate and the gravity of the slag blocking mesh plate.

[0009] In summary, the present invention can automatically remove debris mixed in rainwater to avoid clogging of the filter component, thereby ensuring that rainwater can be effectively collected.

[0010] In an optional embodiment, sliders are provided on both sides of the filter mesh plate in the length direction, and the sliders can slide along the length direction of the filter mesh plate; a rolling roller is provided on the side of the slag blocking mesh plate facing the filter mesh plate, and both ends of the rolling roller are rotatably connected to the corresponding sliders; the side of the slag blocking mesh plate facing the filter mesh plate is fixedly connected to the slider, and the rolling roller is tightly attached to the filter mesh plate and the slag blocking mesh plate, which on the one hand allows the side of the slag blocking mesh plate facing the filter mesh plate to move relatively, and on the other hand, while preventing floating debris from entering the filter pool through the gap between the slag blocking mesh plate and the filter mesh plate, reduces the sliding resistance of the slider.

[0011] In an optional embodiment, the inner wall of the flow container on one side away from the filter screen is tilted, and when the flow container moves to the lower limit position, the inner wall of the flow container on one side away from the filter screen is tilted downward to ensure that the water contained in the flow container can be completely dumped.

[0012] In an alternative embodiment, the top of the filtration tank is in a constricted shape, the cross-section of the counterweight baffle is adapted to the cross-section size of the constricted section of the filtration tank, and the distance of the constricted section at the top of the filtration tank is less than the length of the connecting rope, so that when the counterweight baffle moves down to the limit position, water can enter the filtration tank, and when the counterweight baffle moves up into the constricted section, the entry of water into the filtration tank is reduced or avoided, that is, to ensure the opening and closing of the upper opening of the filtration tank by the up and down movement of the counterweight baffle.

[0013] In an alternative embodiment, at least two guide rods are vertically arranged in the filtration tank, and the counterweight baffle is movably sleeved outside the guide rods, and the guide rods play a guiding role in the movement of the counterweight baffle to prevent the counterweight baffle from skewing and jamming.

[0014] In an alternative embodiment, the bottom of the sedimentation tank is in a funnel shape, and a sewage sluice valve is provided at the bottom of the sedimentation tank to facilitate the discharge of sludge in the sedimentation tank and the cleaning of the sedimentation tank.

[0015] In an alternative embodiment, a filter plate is adapted to the water outlet of the filtration tank to further purify and filter the water discharged from the filtration tank.

[0016] In an alternative embodiment, it further includes a water wheel, a air pump and an air storage tank; the water wheel is located below the water outlet of the filtration tank and can rotate along its own axis under the impact of the water flow discharged from the filtration tank, the water wheel is drivingly connected to the air pump, and the air pump is driven to pump air by the rotation of the water wheel; the air outlet of the air pump is connected to the air storage tank, and a delay closing back pressure valve is connected to the air outlet end of the air storage tank; a pneumatic drain valve is provided at the bottom of the filtration tank, and a plurality of backwash nozzles are arranged at the water outlet of the filtration tank, and the plurality of backwash nozzles face the water outlet side of the filter plate; the pneumatic drain valve is connected to the air outlet end of the delay closing back pressure valve, and the water inlet end of the backwash nozzle is connected to the air outlet end of the delay closing back pressure valve; a water suction pipe is provided in the reservoir, the water outlet of the water suction pipe is connected between the backwash nozzle and the delay closing back pressure valve, and the water suction port of the water suction pipe extends towards the bottom of the reservoir.

[0017] Since the water wheel is located below the water outlet of the filter tank, it can rotate along its own axis under the impact of the water flow discharged from the filter tank, thereby driving the air pump to work and continuously pressurizing the gas in the gas storage tank. When the gas pressure in the gas storage tank reaches the opening pressure of the time-delay closing back-pressure valve, the time-delay closing back-pressure valve opens. On the one hand, it drives the pneumatic drain valve to open, enabling the water inside the filter tank to be directly discharged. On the other hand, when the high-pressure gas output from the gas storage tank flows through the upper end of the water suction pipe, it can evacuate the water suction pipe, thereby sucking the water in the reservoir into the water suction pipe and flowing towards the backwash nozzle under the action of the high-pressure gas. After the gas and water are mixed, they are sprayed at a high speed from the backwash nozzle towards the filter plate to backwash the filter plate, thereby preventing the filter plate from being blocked, and the flushed sewage is discharged through the pneumatic drain valve. As the gas in the gas storage tank is released and the time-delay closing back-pressure valve is reset, the pneumatic drain valve closes, and the air pump continues to pressurize the gas storage tank.

[0018] In an optional embodiment, a bidirectional lead screw is coaxially arranged on the rotation axis of the water wheel, and the air pumping piston rod of the air pump is screwed to the bidirectional lead screw. While facilitating the reciprocating movement of the air pumping piston rod along the axial direction of the air pump, the air pumping piston rod can obtain sufficient output torque, so that the gas storage tank can store compressed gas with sufficient pressure, and further ensure that the water flow ejected from the backwash nozzle can wash the filter plate clean. Compared with using other drive structures, the structure is simpler and more reliable.

[0019] In an optional embodiment, the filter plate is a quartz plate to ensure that the filter plate has sufficient flow capacity and can flush out the impurities filtered therein under the flushing of the backwash nozzle.

[0020] The beneficial effects of the present invention:

[0021] The rainwater collection and reuse device for urban and rural planning provided by the present invention has one side of the top length direction of the filtration tank connected to the rainwater outlet of the sedimentation tank. After the sediment in the rainwater is deposited by the sedimentation tank, the rainwater is discharged to the top of the filtration tank. At the same time, a filter screen plate and a slag blocking net plate are adapted to the top of the filtration tank, and an overflow channel is arranged on the other side. Under normal circumstances, the rainwater after sedimentation treatment flows through the filter screen plate, and the floating garbage or other sundries in the rainwater are blocked at the top of the filtration tank by the filter baffle. As the sundries accumulate on the filter screen plate, part of the rainwater flows into the overflow container. Since one side of the filter screen plate is hinged to the side of the filtration tank where the overflow channel is arranged, one side of the slag blocking net plate is hinged to the other side of the filtration tank, the other side of the slag blocking net plate is slidably connected to the filter screen plate, the side where the slag blocking net plate is slidably connected to the filter screen plate is located below the slag blocking net plate, the middle of the counterweight baffle in the filtration tank is connected to the slag blocking net plate through a connecting rope, and the overflow container is connected to the filter screen plate through a connecting rod. When the force exerted on the filter screen plate by the weight of the filtration container through the lever principle is greater than the sum of the resistance when the filter screen plate and the slag blocking net plate tilt upward and the slag blocking net plate slides and the resistance when the counterweight baffle moves upward, part of the sundries on the filter screen plate roll into the slag collection net pocket under the action of gravity, and the subsequent inflowing rainwater first flows through the slag blocking net plate and then flows towards the slag collection net pocket. Thus, the sundries in the rainwater are blocked on the water inlet side of the filtration tank by the slag blocking net plate and the filter screen plate is backwashed. After the water contained in the overflow container is discharged, the device returns to the state during normal collection. Therefore, it can automatically remove the sundries mixed in the rainwater to avoid clogging of the filtration components, and further ensure the effective collection of rainwater. Brief Description of the Drawings

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0023] Figure 1 is a schematic structural diagram of the rainwater collection and reuse device for urban and rural planning according to an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram when the filter screen plate of the embodiment of the present invention tilts upward to the limit position;

[0025] Figure 3 is a schematic diagram of the pipeline principle of the rainwater collection and reuse device for urban and rural planning according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of the water wheel connected to the air pump according to an embodiment of the present invention.

[0027] Marks in the drawings and corresponding component names:

[0028] 10 - sedimentation tank, 11 - rainwater inlet, 12 - rainwater outlet, 13 - sewage gate valve;

[0029] 20-filter tank, 21-flow trough, 22-filter screen plate, 22a-slider, 23-slag screen plate, 23a-roller, 24-weight baffle, 25-connecting rope, 26-guide rod, 27-filter plate, 28-pneumatic drain valve, 29-recoil nozzle;

[0030] 30-slag collecting net bag, 31-flow container, 32-connecting rod;

[0031] 40- water storage tank, 41- water intake pipe;

[0032] 50-water wheel, 51-bidirectional screw;

[0033] 60-air pump, 61-air pump piston rod;

[0034] 70-gas storage tank, 71-delayed closing back pressure valve. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] In the description of the embodiments of the present application, the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0038] Combination Figure 1, this embodiment provides a rainwater collection and reuse device for urban and rural planning, including a sedimentation tank 10, a filtration tank 20, a slag collection net bag 30 and a water storage tank 40. The water storage tank 40 is used to collect the clear water flowing out of the filtration tank 20. On both sides of the upper end of the sedimentation tank 10, a rainwater inlet 11 and a rainwater outlet 12 are respectively provided. The rainwater inlet is used to be connected to a rainwater channel. One side of the filtration tank 20 in the length direction of the top is connected to the rainwater outlet 12, and an overflow channel 21 is provided on the other side. And a filter screen plate 22 and a slag blocking net plate 23 are adapted to the top of the filtration tank 20. One side of the filter screen plate 22 is hinged to the side of the filtration tank 20 where the overflow channel 21 is provided, and one side of the slag blocking net plate 23 is hinged to the other side of the filtration tank 20. The other side of the slag blocking net plate 23 is slidably connected to the filter screen plate 22, and the side where the slag blocking net plate 23 is slidably connected to the filter screen plate 22 is located below the slag blocking net plate 23. A counterweight baffle 24 is provided in the filtration tank 20. The middle of the counterweight baffle 24 is connected to the slag blocking net plate 23 through a connecting rope 25, and the counterweight baffle 24 can move up and down in the filtration tank 20. By moving the counterweight baffle 24, the opening and closing of the top opening of the filtration tank 20 can be realized. An overflow container 31 is provided in the slag collection net bag 30. The overflow container 31 can collect the water discharged from the overflow channel 21. The overflow container 31 is connected to the filter screen plate 22 through a connecting rod 32. Among them, when the overflow container 31 is full of water, the filter screen plate 22 and the slag blocking net plate 23 are upturned, and the counterweight baffle 24 closes the top opening of the filtration tank 20, and when the overflow container 31 moves to the lower limit position, it can empty the water it holds.

[0039] Combined with Figure 2 Specifically, sliding blocks 22a are provided on both sides of the filter screen plate 22 in the length direction. The sliding blocks 22a can slide along the length direction of the filter screen plate 22. A rolling roller 23a is provided on the side of the slag blocking net plate 23 facing the filter screen plate 22. Both ends of the rolling roller 23a are rotatably connected to the corresponding sliding blocks 22a. The side of the slag blocking net plate 23 facing the filter screen plate 22 is hinged to the sliding blocks 22a, and the rolling roller 23a is closely attached to the filter screen plate 22 and the slag blocking net plate 23. By the rolling roller 23a being closely attached to both the filter screen plate 22 and the slag blocking net plate 23, on the one hand, the side of the slag blocking net plate 23 facing the filter screen plate 22 can move relatively, and on the other hand, while preventing floating debris from entering the filtration tank 20 through the gap between the slag blocking net plate 23 and the filter screen plate 22, the resistance of the sliding blocks 22a sliding is reduced.

[0040] Among them, the top of the filter tank 20 is in a flared shape, the cross-section of the counterweight baffle 24 is adapted to the cross-section size of the flared section of the filter tank 20, and the distance of the flared section at the top of the filter tank 20 is less than the length of the connecting rope 25, so that when the counterweight baffle 24 moves down to the limit position, water flow can enter the filter tank 20, and when the counterweight baffle 24 moves up into the flared section, the water flow into the filter tank 20 is reduced or avoided, that is, to ensure that the opening and closing of the upper end opening of the filter tank 20 are realized by the up and down movement of the counterweight baffle 24.

[0041] On this basis, at least two guide rods 26 are vertically arranged in the filter tank 20, and the counterweight baffle 24 is movably sleeved outside the guide rods 26, and the guide rods 26 play a guiding role in the movement of the counterweight baffle 24 to prevent the counterweight baffle 24 from being skewed and jammed.

[0042] It should be understood that the inner wall of the side of the flow-through container 31 away from the filter mesh plate 22 is inclined, and when the flow-through container 31 moves to the lower limit position, the inner wall of the side of the flow-through container 31 away from the filter mesh plate 22 is inclined downward to ensure that the water contained in the flow-through container 31 can be completely poured out.

[0043] In addition, the bottom of the sedimentation tank 10 is in a funnel shape, and a sewage sluice valve 13 is provided at the bottom of the sedimentation tank 10 to facilitate the discharge of the sludge in the sedimentation tank 10 and the cleaning of the sedimentation tank 10.

[0044] It should be noted that the sedimentation tank 10 is built or supported at a place lower than a certain section of the rainwater channel, the water inlet side of the filter tank 20 is lower than the rainwater outlet 12, so that the water discharged from the rainwater outlet 12 impacts on the filter mesh plate 22, the water storage tank 40 is built at a position lower than the outlet of the filter tank 20, at the same time the overflow trough 21 is lower than the water inlet of the filter tank 20, and the flow-through container 31 is lower than the water outlet end of the overflow trough 21. For the sedimentation tank 10, in this embodiment, it is erected on the ground by a bracket to facilitate the collection of the sludge discharged from the bottom of the sedimentation tank 10 during sewage discharge.

[0045] Under normal circumstances, the rainwater after sedimentation treatment flows through the filter mesh plate 22, and the floating garbage or other sundries in the rainwater are blocked at the top of the filter tank 20 by the filter baffle. The rainwater filtered by the filter mesh plate 22 then flows through the filter mesh plate 22 and the slag blocking mesh plate 23 into the filter tank 20 and then into the water storage tank 40 for collection. As the sundries accumulate on the filter mesh plate 22, the flow capacity of the filter mesh plate 22 decreases, so that the rainwater directly flows through the overflow trough 21 to the slag collection net pocket 30. At this time, the sundries carried by the rainwater are collected by the slag collection net pocket 30, and part of the rainwater is discharged and part flows into the flow-through container 31. As the amount of rainwater in the flow-through container 31 increases, the weight of the flow-through container 31 increases.

[0046] When the force exerted on the filter mesh plate 22 by the weight of the filtering container through the lever principle is greater than the sum of the gravity of the filter mesh plate 22, the gravity of the slag blocking mesh plate 23, the resistance when the slag blocking mesh plate 23 slides, and the resistance when the counterweight baffle 24 moves upward, the filtering container moves downward, the filter mesh plate 22 warps upward and inclines towards the slag collection net pocket 30, the slag blocking mesh plate 23 warps upward and inclines towards the water inlet side of the filter pool 20, and the counterweight baffle 24 moves upward and closes the opening of the filter pool 20. At this time, some of the sundries filtered on the filter mesh plate 22 roll into the slag collection net pocket 30 under the action of gravity. The subsequent inflowing rainwater first passes through the slag blocking mesh plate 23 and then directly flows through the upper surface of the counterweight baffle 24, through the filter mesh plate 22, and towards the slag collection net pocket 30. Thus, the sundries in the rainwater are blocked on the water inlet side of the filter pool 20 by the slag blocking mesh plate 23, and the rainwater flowing through the filter mesh plate 22 can backwash the filter mesh plate 22. After the water contained in the water passing container 31 is discharged, under the action of the self-weight of the counterweight baffle 24 and the gravity of the filter mesh plate 22 and the slag blocking mesh plate 23, it returns to the state during normal collection.

[0047] In summary, the rainwater collection and reuse device for urban and rural planning provided in this embodiment can automatically remove the sundries mixed in the rainwater to avoid clogging of the filtering components, thereby ensuring effective collection of rainwater. Embodiment

[0048] Combined with Figure 2 , this embodiment provides a rainwater collection and reuse device for urban and rural planning. Based on the structure and principle described in Embodiment 1, a filter plate 27 is adapted to the water outlet of the filter pool 20 to further purify and filter the water discharged from the filter pool 20.

[0049] Combined with Figure 2 and Figure 3, this embodiment also includes a water wheel 50, an air pump 60 and an air tank 70; the water wheel 50 is located below the water outlet of the filter pool 20, and can rotate along its own axis under the impact of the water flow discharged from the filter pool 20, the water wheel 50 is transmission-connected to the air pump 60, and the air pump 60 is driven to inflate through the rotation of the water wheel 50; the air outlet of the air pump 60 is connected to the air tank 70, and the air outlet end of the air tank 70 is connected to a delayed closing back pressure valve 71; a pneumatic drain valve 28 is provided at the bottom of the filter pool 20, and a plurality of backwash sprays are provided at the water outlet of the filter pool 20 The pneumatic drain valve 28 is connected to the air outlet end of the delayed closing back pressure valve 71, and the water inlet end of the recoil nozzle 29 is connected to the air outlet end of the delayed closing back pressure valve 71 (the pneumatic drain valve 28 is close to the delayed closing back pressure valve 71); a water suction pipe 41 is provided in the water reservoir 40, and the water outlet of the water suction pipe 41 is connected between the recoil nozzle 29 and the delayed closing back pressure valve 71 (far away from the delayed closing back pressure valve 71), and the water suction port of the water suction pipe 41 extends to the bottom of the water reservoir 40.

[0050] Since the water wheel 50 is located below the water outlet of the filter pool 20, the water wheel 50 can rotate along its own axis under the impact of the water flow discharged from the filter pool 20, thereby driving the air pump 60 to work and continuously pressurizing the gas in the gas tank 70. When the gas pressure in the gas tank 70 reaches the opening pressure of the delayed closing back pressure valve 71, the delayed closing back pressure valve 71 opens, which, on the one hand, drives the pneumatic drain valve 28 to open, so that the gas in the filter pool 20 can be directly discharged, and on the other hand, when the high-pressure gas output by the gas tank 70 flows through the upper end of the water suction pipe 41, it can evacuate the water suction pipe 41, thereby sucking the water in the water storage tank 40 into the water suction pipe 41, and under the action of the high-pressure gas, it flows to the backwash nozzle 29, and the gas and water are mixed and sprayed to the filter plate 27 at a high speed through the backwash nozzle 29 to backwash the filter plate 27, thereby preventing the filter plate 27 from being blocked, and the flushed sewage is discharged through the pneumatic drain valve 28. As the gas in the gas storage tank 70 is released and the extended closed back pressure valve 71 is reset, the pneumatic drain valve 28 is closed, and the air pump 60 continues to pressurize the gas storage tank 70 .

[0051] It should be understood that the delayed closing back pressure valve 71 can be a delayed closing back pressure valve 71 with a mechanical delay reset structure, or it can be a delayed closing back pressure valve 71 with electronic delay. To ensure the reliability and non-activeness of the delayed closing back pressure valve 71, the present embodiment adopts a delayed closing back pressure valve 71 with a mechanical delay reset structure.

[0052] gather Figure 4Specifically, in this embodiment, a two-way lead screw 51 is coaxially arranged on the rotation axis of the water wheel 50. The air pump 60 is a piston type air pump, and the air pumping piston rod 61 of the air pump 60 is screwed to the two-way lead screw 51. Thus, while facilitating the reciprocating movement of the air pumping piston rod 61 along the axial direction of the air pump 60, the air pumping piston rod 61 can obtain sufficient output torque, so that the air storage tank 70 can store compressed gas with sufficient pressure, and further ensure that the water flow ejected from the recoil nozzle 29 can wash the filter plate 27 clean. Compared with using other drive structures, the structure is simpler and more reliable. Moreover, by driving the air pumping piston rod 61 to move through the rotation of the lead screw, the air pumping frequency of the air pump 60 can be reduced as much as possible, so that the recoil nozzle 29 has sufficient working intervals, ensuring that a large amount of water in the filter tank 20 can flow into the reservoir 40.

[0053] Among them, the filter plate 27 is a quartz plate to ensure that the filter plate 27 has sufficient flow capacity and can flush out the impurities filtered therein under the flushing of the recoil nozzle 29.

[0054] The specific embodiments described above have further elaborated on the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rainwater collection and reuse system for urban and rural planning, characterized in that, It includes a grit chamber (10), a filtration tank (20), a slag collection net bag (30) and a reservoir (40), and the reservoir (40) is used to collect the clear water flowing out of the filtration tank (20); On both sides of the upper end of the grit chamber (10), a rainwater inlet (11) and a rainwater outlet (12) are respectively provided, and the rainwater inlet is used to be connected to a rainwater channel; One side in the length direction of the top of the filtration tank (20) is connected to the rainwater outlet (12), and an overflow trough (21) is provided on the other side. Moreover, a filter screen plate (22) and a slag blocking net plate (23) are adapted to the top of the filtration tank (20); One side of the filter screen plate (22) is hinged to the side of the filtration tank (20) where the overflow trough (21) is provided, one side of the slag blocking net plate (23) is hinged to the other side of the filtration tank (20), the other side of the slag blocking net plate (23) is slidably connected to the filter screen plate (22), and the side of the slag blocking net plate (23) that is slidably connected to the filter screen plate (22) is located on the lower side of the slag blocking net plate (23); A counterweight baffle (24) is provided in the filtration tank (20), the middle of the counterweight baffle (24) is connected to the slag blocking net plate (23) through a connecting rope (25), and the counterweight baffle (24) can move up and down in the filtration tank (20). By moving the counterweight baffle (24), the opening and closing of the top opening of the filtration tank (20) can be realized; An overflow container (31) is provided in the slag collection net bag (30), the overflow container (31) can collect the water discharged from the overflow trough (21), and the overflow container (31) is connected to the filter screen plate (22) through a connecting rod (32); Among them, when the overflow container (31) is filled with water, the filter screen plate (22) and the slag blocking net plate (23) tilt upwards, the counterweight baffle (24) closes the top opening of the filtration tank (20), and when the overflow container (31) moves to the lower limit position, it can empty the water contained in itself.

2. The rainwater collection and reuse system for urban and rural planning according to claim 1, wherein Sliders (22a) are provided on both sides in the length direction of the filter screen plate (22), and the sliders (22a) can slide along the length direction of the filter screen plate (22); Rolling rollers (23a) are provided on the side of the slag blocking net plate (23) facing the filter screen plate (22), and both ends of the rolling rollers (23a) are rotatably connected to the corresponding sliders (22a); The side of the slag blocking net plate (23) facing the filter screen plate (22) is hinged to the slider (22a), and the rolling rollers (23a) are closely attached to the filter screen plate (22) and the slag blocking net plate (23).

3. The rainwater collection and reuse system for urban and rural planning according to claim 1, characterized in that, The inner wall of the side of the overflow container (31) away from the filter screen plate (22) is inclined, and when the overflow container (31) moves to the lower limit position, the inner wall of the side of the overflow container (31) away from the filter screen plate (22) inclines downwards.

4. The rainwater collection and reuse system for urban and rural planning according to claim 1, characterized in that The top of the filtration tank (20) is in a constricted shape, the cross-section of the counterweight baffle (24) is adapted to the cross-section size of the constricted section of the filtration tank (20), and the distance of the constricted section at the top of the filtration tank (20) is less than the length of the connecting rope (25).

5. The rainwater collection and reuse system for urban and rural planning according to claim 4, characterized in that, At least two guide rods (26) are vertically arranged in the filtration tank (20), and the counterweight baffle (24) is movably sleeved outside the guide rods (26).

6. The rainwater collection and reuse system for urban and rural planning according to claim 1, characterized in that, The bottom of the sedimentation tank (10) is in a funnel shape, and a sewage sluice valve (13) is arranged at the bottom of the sedimentation tank (10).

7. The rainwater collection and reuse system for urban and rural planning according to any one of claims 1 to 6, characterized in that, A filter plate (27) is adapted to the water outlet of the filtration tank (20).

8. The rainwater collection and reuse system for urban and rural planning according to claim 7, characterized in that, It further includes a water wheel (50), a pump (60) and an air storage tank (70); The water wheel (50) is located below the water outlet of the filtration tank (20), and can rotate along its own axis under the impact of the water flow discharged from the filtration tank (20). The water wheel (50) is in transmission connection with the pump (60), and the rotation of the water wheel (50) drives the pump (60) to pump air; The air outlet of the pump (60) is connected to the air storage tank (70), and a delay closing back pressure valve (71) is connected to the air outlet end of the air storage tank (70); A pneumatic drain valve (28) is arranged at the bottom of the filtration tank (20), and a plurality of backwash nozzles (29) are arranged at the water outlet of the filtration tank (20), and the plurality of backwash nozzles (29) are facing the water outlet side of the filter plate (27); The pneumatic drain valve (28) is connected to the air outlet end of the delay closing back pressure valve (71), and the water inlet end of the backwash nozzle (29) is connected to the air outlet end of the delay closing back pressure valve (71); A water suction pipe (41) is arranged in the water storage tank (40), the water outlet of the water suction pipe (41) is connected between the backwash nozzle (29) and the delay closing back pressure valve (71), and the water suction port of the water suction pipe (41) extends towards the bottom of the water storage tank (40).

9. The rainwater collection and reuse system for urban and rural planning according to claim 8, characterized in that, A bidirectional lead screw (51) is coaxially arranged with the rotating shaft of the water wheel (50), and the air pumping piston rod (61) of the pump (60) is screwed to the bidirectional lead screw (51).

10. The rainwater collection and reuse system for urban and rural planning according to claim 7, characterized in that, The filter plate (27) is a quartz plate.

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