A water treatment device and treatment method for a drainage system

Abstract

The present invention relates to a water treatment device for a drainage system, which includes a bucket-shaped open container, a passive butterfly valve, a sewage discharger, a filter box, a basket, a closing plate, and an adaptive valve plate opening and closing mechanism. The lower end of the bucket-shaped open container is funnel-shaped. The passive butterfly valve has a valve plate that can freely flip. There is a partition in the filter box for dividing the internal space of the filter box into two parts. The number of the closing plates is two. The adaptive valve plate opening and closing mechanism includes two elastic telescopic long rods and two heightening brackets. The two heightening brackets are respectively fixedly arranged on the tops of the two closing plates. The two elastic telescopic long rods are symmetrically arranged with respect to the vertical plane where the axis of rotation of the valve plate is located. The present invention is used to continuously perform secondary fine filtration treatment on sewage and rainwater containing sediment particles without stopping the machine, so as to provide a relatively clean water body for subsequent deep purification equipment.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and specifically relates to a water treatment device and method for a drainage system. Background Art

[0002] In the initial stage of rainfall, rainwater will wash roofs, roads, etc. At this time, the rainwater contains a large amount of impurities, such as dust, sediment, leaves, etc., as well as pollutants with a relatively high concentration in the initial stage, such as organic matter, heavy metals, etc. The rainwater runoff diversion device monitors and controls the rainfall process, discharges the rainwater with heavier pollution in the initial stage, and when the rainwater reaches a certain cleanliness level, it is introduced into the rainwater collection system for storage and utilization.

[0003] The preliminary filtration and purification of rainwater have the following functions:

[0004] 1. Improve the quality of collected rainwater. By diverting the rainwater with heavier pollution in the initial stage, the difficulty and cost of subsequent rainwater treatment can be effectively reduced, and the quality of the collected rainwater can be improved, making it more suitable for non-drinking water uses such as irrigation, car washing, and landscape water.

[0005] 2. Protect the equipment of the rainwater collection system. Avoid the initial rainwater containing a large amount of impurities and pollutants from entering the rainwater collection system, reduce the wear and blockage of equipment such as pumps and filters in the system, and extend the service life of the equipment.

[0006] 3. Realize the rational utilization of rainwater resources. Ensure that the collected rainwater meets certain quality standards, improve the utilization value of rainwater, and provide effective water resource support for the sustainable development of the city.

[0007] Currently, the pretreatment of the rainwater drainage system is generally a runoff diversion device, which mainly filters out larger impurities such as leaves, branches, and gravel particles. However, there are often a large number of fine sediment particles in the rainwater, which will cause great physical wear and tear to the subsequent purification treatment equipment. Some multi-stage filtration treatment equipment needs to be shut down during the process of regularly maintaining and replacing the filter element, and at this time, the filtration work also needs to be suspended, with many drawbacks. Summary of the Invention

[0008] Based on this, in view of the problems in the prior art, it is necessary to provide a water treatment device and method for a drainage system to continuously perform secondary fine filtration treatment on sewage rainwater containing sediment particles without shutting down, so as to provide a relatively clean water body for the subsequent deep purification equipment.

[0009] To solve the problems in the prior art, the technical solution adopted by the present invention is:

[0010] A water treatment device for a drainage system, comprising a bucket-shaped open container, a passive butterfly valve, a sewage discharger, a filter box, a basket, a closing plate, and an adaptive valve plate opening and closing mechanism. The lower end of the bucket-shaped open container is funnel-shaped. The passive butterfly valve is fixedly connected to the bottom of the bucket-shaped open container. The sewage discharger is fixedly connected to the bottom of the passive butterfly valve. There is a valve plate in the passive butterfly valve that can freely flip. The filter box is fixedly arranged in the upper half of the inner side of the bucket-shaped open container. The filter box is a longitudinally penetrating structure and is formed with a partition for dividing the internal space of the filter box into two parts. There are two baskets, and the two baskets are respectively arranged in the cavities formed by the partition in the filter box. The number of closing plates is two, and the two closing plates are respectively arranged directly below the two baskets. The adaptive valve plate opening and closing mechanism includes two elastic telescopic long rods and two heightening brackets. The two heightening brackets are respectively fixedly arranged on the tops of the two closing plates. The two elastic telescopic long rods are both arranged vertically. The upper end of each elastic telescopic long rod is connected to the bottom of the corresponding closing plate, and the lower end is connected to the valve plate. The two elastic telescopic long rods are symmetrically arranged with respect to the vertical plane where the axis of rotation of the valve plate is located. An inlet is arranged on the bucket-shaped open container below the filter box, and an outlet is arranged above the filter box.

[0011] Further, the passive butterfly valve further includes a double-end flange pipe for installing the valve plate. The upper end of the double-end flange pipe is fixedly connected to the funnel bottom of the bucket-shaped open container, and the lower end is fixedly connected to the top inlet of the sewage outlet. The valve plate is pivotally connected to the inner side of the double-end flange pipe for opening and closing the upper and lower sides of the double-end flange pipe. The pipe diameter of the double-end flange pipe is the same as the caliber of the funnel-shaped bottom of the bucket-shaped open container.

[0012] Further, the filter box is a cylindrical structure. The partition equally divides its inner side into two semi-circular cavities. An annular outer edge extending outward is formed at the outer edge of the top of the filter box, and a circular inner edge extending inward is formed at the inner edge of the bottom of the filter box. An annular flange for fixedly connecting the annular inner edge is formed on the inner wall of the upper half of the bucket-shaped open container. A first sealing ring is clamped between the annular flange and the annular inner edge.

[0013] Further, the basket is a semi-cylindrical barrel-shaped structure. The two baskets are correspondingly arranged in the two semi-circular cavities. Grid-shaped strip-shaped through holes are formed on the bottom wall of the basket. A lap arc strip extending outward for lapping on the top of the annular outer edge is formed at the outer edge of the top of the basket. A U-shaped handle is fixedly connected to the top of each basket.

[0014] Further, the opening and closing plate is semi-circular, a second sealing ring that matches the shape of the bottom of the filter tank is attached to the bottom of the annular inner edge, strip-shaped protrusions that protrude upward and are used to tightly press against the second sealing ring are formed at the top edges of each opening and closing plate, the height increasing bracket is located at the center of the top of the opening and closing plate, and the height increasing bracket upwardly abuts against the bottom of the basket. When the bottom of the basket contacts the annular inner edge downward, the height increasing bracket separates the opening and closing plate downward from the bottom of the filter tank.

[0015] Further, three guide rods are evenly distributed at equal intervals at the circular edge of each opening and closing plate, connecting ears fixedly connected to the lower ends of the guide rods one by one are formed at the outer edge of the opening and closing plate, the upper ends of each guide rod sequentially penetrate through the annular flange and the annular outer edge upward, a plurality of limit sleeves for the guide rods to movably pass through are formed on the outer wall of the filter tank, a first spring is sleeved on the upper end of each guide rod, a gasket bolt is fixedly connected to the top of the guide rod, the upper and lower ends of the first spring respectively abut against the gasket bolt and the annular outer edge, first through holes for the guide rods to pass through are formed on both the annular outer edge and the annular flange, a second through hole for the guide rod to pass through is formed on the first sealing ring, the aperture of the second through hole is smaller than the rod diameter of the guide rod, and the aperture of the first through hole is larger than the rod diameter of the guide rod.

[0016] Further, the elastic telescopic long rod includes a short sleeve rod, a slender rod, and a second spring. The upper end of the short sleeve rod is hinged to the bottom of the corresponding opening and closing plate, the lower end of the slender rod is hinged to the upper surface of the valve plate, the upper end of the slender rod is movably inserted into the lower end of the short sleeve rod, spring seats are fixedly sleeved on both the short sleeve rod and the slender rod, the upper and lower ends of the second spring respectively abut against the two spring seats, and strip-shaped pressure relief holes are formed on the side wall of the short sleeve rod.

[0017] Further, the sewage discharger is a screw feeder, a rotation induction switch for detecting the rotation of the rotating shaft of the valve plate is arranged outside the passive butterfly valve, the rotation induction switch is used to start and stop the screw extruder, a flange adapter plate is connected between the feed inlet of the screw extruder and the lower end of the passive butterfly valve, and a through hole with the same diameter as the feed inlet of the screw extruder is formed at the center of the flange adapter plate.

[0018] A treatment method for a water treatment device includes the following steps:

[0019] S1, connect the water inlet of the present device to a preposed rainwater runoff device through a water pump, and continuously pump the rainwater preliminarily filtered in the rainwater runoff device into the bucket-type open container through the water pump;

[0020] S2. The rainwater entering the bucket - type open container from the inlet of the rainwater well pumped by the water pump. After the rainwater enters from the inlet, it enters along the tangential direction of the circle of the bucket - type open container and adheres to the wall. The particulate impurities in the rainwater gradually settle downward due to the centrifugal force, and the water gradually passes upward through the filter barrel. After being adsorbed by the porous filter balls filled in the basket to remove smaller particulate impurities again, it overflows from the outlet to the subsequent collection;

[0021] S3. After the device works continuously for a period of time, the porous filter balls in the basket need to be replaced regularly. When replacing, the porous filter balls in the two baskets are replaced in sequence. First, take out one of the baskets and replace the porous filter balls inside it. When this basket is taken out, the closing plate below it loses the downward pressure and bounces upward and finally tightly seals half of the bottom of the filter box. At the same time, the elastic telescopic rod below this closing plate also moves upward, and thus the pressure on both sides of the valve plate is unbalanced. The valve plate changes from the horizontal closed state to the inclined open state;

[0022] S4. After the valve plate changes from the horizontal closed state to the inclined open state, the sediment settled at the bottom of the bucket - type open container enters the sewage discharge device downward, thus completing the sewage discharge process synchronized with the process of replacing the filter balls;

[0023] S5. Put the replaced basket back into the filter box, then take out the basket on the other side. Similarly, the valve plate below will be opened for sewage discharge. When both baskets are placed in the filter box, the pressure on both sides of the rotating shaft of the valve plate is balanced. At this time, the valve plate closes and the sewage discharge stops.

[0024] The beneficial effects of the present invention compared with the prior art are as follows:

[0025] First, compared with the traditional flow - diversion device, a secondary filtration structure with a simple structure is added to achieve the purpose of strengthening filtration, and the filtration effect is better;

[0026] Second, during the process of replacing the filter element in the present invention, the machine can be operated without stopping, so that the filtration process can continue, and sewage discharge can be actively carried out during the replacement of the filter element;

[0027] Third, the structure of this device is simple, and the maintenance is simple and easy to use. Compared with the traditional flow - diversion device, it has a more detailed and efficient filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the three - dimensional structure schematic diagram of the present invention;

[0029] Figure 2 is the front view of the present invention;

[0030] Figure 3 is Figure 2 the plane cross - sectional view along the line A - A in

[0031] Figure 4is the top view of the present invention;

[0032] Figure 5 is Figure 4 the plane cross-sectional view along line B-B in

[0033] Figure 6 the partial schematic plane cross-sectional view of the elastic telescopic long rod of the present invention;

[0034] Figure 7 is Figure 5 the enlarged schematic view of the structure at C in

[0035] Figure 8 is Figure 5 the enlarged schematic view of the structure at D in

[0036] Figure 9 is the partial three-dimensional structure schematic view of the present invention;

[0037] Figure 10 is Figure 9 the enlarged schematic view of the structure at E in

[0038] Figure 11 is the partial three-dimensional structure exploded schematic view of the present invention;

[0039] The reference numerals in the figure are: 1 - barrel-type open container; 2 - passive butterfly valve; 3 - screw feeder; 4 - filter box; 5 - basket; 6 - opening and closing plate; 7 - valve plate; 8 - partition plate; 9 - elastic telescopic long rod; 10 - heightening bracket; 11 - water inlet; 12 - water outlet; 13 - double-end flange pipe; 14 - annular outer edge; 15 - circular inner edge; 16 - annular flange; 17 - first sealing ring; 18 - grid-shaped strip-shaped through hole; 19 - overlapping arc strip; 20 - U-shaped handle; 21 - second sealing ring; 22 - strip-shaped protrusion; 23 - guide rod; 24 - connecting ear; 25 - limit sleeve; 26 - first spring; 27 - gasket bolt; 28 - first through hole; 29 - second through hole; 30 - short sleeve rod; 31 - slender rod; 32 - second spring; 33 - spring seat; 34 - strip-shaped pressure relief hole; 35 - rotary induction switch; 36 - flange adapter plate; 37 - through hole. Detailed implementation manners

[0040] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0041] Refer to Figures 1 to 11A water treatment device for a drainage system is shown, including a bucket-shaped open container 1, a passive butterfly valve 2, a sewage discharger, a filter box 4, a basket 5, a closing plate 6, and an adaptive valve plate opening and closing mechanism. The lower end of the bucket-shaped open container 1 is funnel-shaped. The passive butterfly valve 2 is fixedly connected to the bottom of the bucket-shaped open container 1. The sewage discharger is fixedly connected to the bottom of the passive butterfly valve 2. There is a valve plate 7 that can freely flip inside the passive butterfly valve 2. The filter box 4 is fixedly arranged in the upper half inside the bucket-shaped open container 1. The filter box 4 is a longitudinally through structure and has a partition 8 formed inside it for dividing the internal space of the filter box 4 into two parts. There are two baskets 5, and the two are respectively arranged in the cavities formed by the partition 8 in the filter box 4. The number of the closing plates 6 is two, and the two closing plates 6 are respectively arranged directly below the two baskets 5. The adaptive valve plate opening and closing mechanism includes two elastic telescopic long rods 9 and two heightening brackets 10. The two heightening brackets 10 are respectively fixedly arranged on the tops of the two closing plates 6. The two elastic telescopic long rods 9 are both arranged vertically. The upper end of each elastic telescopic long rod 9 is connected to the bottom of the corresponding closing plate 6, and the lower end is connected to the valve plate 7. The two elastic telescopic long rods 9 are symmetrically arranged with respect to the vertical plane where the axis of rotation of the valve plate 7 is located. There is an inlet 11 located below the filter box 4 and an outlet 12 located above the filter box 4 on the bucket-shaped open container 1.

[0042] The pre-rainwater runoff device of the drainage system preliminarily filters the collected rainwater, screening out larger impurities in the water such as leaves, branches, and stones. The rainwater preliminarily filtered by the pre-filter is pumped into the bucket-shaped open container 1 of the present invention. The extending direction of the inlet 11 of the bucket-shaped open container 1 is the same as the tangential direction of the inner circular wall of the bucket-shaped open container 1. The pumped rainwater enters along the circular tangent direction close to the inner wall of the bucket-shaped open container 1. Under the action of centrifugal force, the fine particles adhere to the wall and decelerate, and finally slowly sink to the funnel-shaped bottom and accumulate on the valve plate 7. As the water level rises, the rainwater rises upward through the closing plate 6 and then continues to rise from the bottom opening of the filter box 4. The rainwater passes through the porous filter balls pre-filled in the basket 5 to filter and adsorb fine impurities, and finally enters the subsequent purification process from the outlet 12.

[0043] When the porous filter balls in the basket 5 are replaced regularly, the filter balls in the two baskets 5 need to be replaced one by one and then put back. When one of the baskets 5 is lifted, the heightening bracket 10 on the opening and closing plate 6 below it loses the downward pressure and then floats upward under the action of elastic force and buoyancy until it fits against the bottom opening of the filter box 4 for blocking. Thus, the water below cannot continue to flow upward from here to the water outlet 12 after the basket 5 above is taken away. Then, the filter balls in the taken-out basket 5 are replaced. During this process, since one of the opening and closing plates 6 loses the downward pressure of the basket 5, the opening and closing plate 6 will drive the elastic telescopic long rod 9 connected to its bottom to lift a certain distance, so that the downward pressure of the elastic telescopic long rod 9 on the corresponding side of the lower valve plate 7 is reduced, and then the balance state at both ends of the valve plate 7 is broken. The valve plate 7 changes from the original horizontal state to an inclined state, and then the bottom of the funnel-shaped barrel open container 1 is opened, so that the sediment accumulated on it falls into the sewage discharger, and the sewage discharger discharges the sewage rainwater with a large amount of sediment. The basket 5 with the replaced filter balls is put back. During this process, the basket 5 sinks to the box body of the filter box 4 under its own weight. At this time, the bottom of the basket 5 has moved the opening and closing plate 6 downward by a certain distance through the heightening bracket 10, so that the opening and closing plate 6 is separated from the bottom of the filter box 4, and then the water passage for the water to flow upward into the basket 5 is reopened. At the same time, the lower elastic telescopic long rod 9 also returns to the initial position. At this time, the pressures on both sides of the rotating shaft of the valve plate 7 are balanced, and the valve plate 7 returns to the horizontal state to keep the bottom of the barrel open container 1 closed. Then, the replacement process of the filter balls in the other basket 5 is completed in the same way, and the equipment does not need to be started or stopped during the whole process.

[0044] In order to enable the sediment settled by centrifugal force to smoothly enter the sewage discharger, the following features are specifically set:

[0045] The passive butterfly valve 2 further includes a double-end flange pipe 13 for installing the valve plate 7. The upper end of the double-end flange pipe 13 is fixedly connected to the funnel bottom of the barrel open container 1, and the lower end is fixedly connected to the top inlet of the sewage outlet. The valve plate 7 is pivotally connected at a fixed point inside the double-end flange pipe 13 to open and close the upper and lower parts of the double-end flange pipe 13. The diameter of the double-end flange pipe 13 is the same as the caliber of the funnel-shaped bottom of the barrel open container 1. By setting the double-end flange pipe 13 with the same diameter as the bottom caliber of the barrel open container 1, it is ensured that the sediment sliding downward can finally accumulate on the valve plate 7, and at the same time, the flange surfaces at both ends of the double-end flange pipe 13 can also be conveniently butt-connected and installed.

[0046] In order to solve the installation and limiting problems of the filter box 4 and the two baskets 5, the following features are specifically set:

[0047] The filter box 4 is of a cylindrical structure. The partition plate 8 equally divides its inner side into two semi-circular cavities. An annular outer edge 14 extending outward is formed at the outer edge of the top of the filter box 4, and a circular inner edge 15 extending inward is formed at the inner edge of the bottom of the filter box 4. An annular flange 16 for fixedly connecting the annular inner edge is formed on the inner wall of the upper half of the bucket-shaped open container 1. A first sealing ring 17 is clamped between the annular flange 16 and the annular inner edge. The filter box 4 is fixedly connected to the annular flange 16 through the annular outer edge 14, so that the filter box 4 is fixedly installed on the upper half inside of the bucket-shaped open container 1. The annular inner edge restricts the sinking position of the basket 5 by upwardly supporting the basket 5, and the first sealing ring 17 ensures that no contaminated rainwater passes between the annular outer edge 14 and the annular flange 16.

[0048] In order to facilitate the removal and placement of the basket 5 and have good water flow throughability, the following features are specifically set:

[0049] The basket 5 is of a semi-cylindrical barrel-like structure. Two baskets 5 are correspondingly arranged in the two semi-circular cavities. A grid-shaped strip-shaped through hole 18 is formed on the bottom wall of the basket 5. A lapping arc strip 19 extending outward for lapping on the top of the annular outer edge 14 is formed at the outer edge of the top of the basket 5. A U-shaped handle 20 is fixedly connected to the top of each basket 5. By providing the U-shaped handle 20, the basket 5 can be conveniently removed and placed for replacing the filter balls, and the grid-shaped strip-shaped through hole 18 ensures that the water flow can smoothly flow upward into the basket 5.

[0050] In order to further ensure the sealing effect between the opening and closing plate 6 and the bottom of the filter box 4, the following features are specifically set:

[0051] The opening and closing plate 6 is semi-circular. A second sealing ring 21 that fits the shape of the bottom of the filter box 4 is attached to the bottom of the annular inner edge. A strip-shaped protrusion 22 that protrudes upward for pressing against the second sealing ring 21 is formed at the top edge of each opening and closing plate 6. The heightening bracket 10 is located at the top center of the opening and closing plate 6, and the heightening bracket 10 upwardly abuts against the bottom of the basket 5. When the bottom of the basket 5 contacts the annular inner edge downward, the heightening bracket 10 separates the opening and closing plate 6 downward from the bottom of the filter box 4. By forming an upwardly protruding strip-shaped protrusion at the top edge of the top surface of the opening and closing plate 6, the problem of inconsistent flatness that may be caused by a large-area plane is avoided, thus affecting the sealing effect. By pressing the second sealing ring 21 with the strip-shaped protrusion, the sealing effect between the opening and closing plate 6 and the bottom of the corresponding semi-circular cavity of the filter box 4 is ensured after the basket 5 is removed.

[0052] In order to ensure that the opening and closing plate 6 can quickly close upward to the bottom of the filter box 4 after the basket 5 is removed, the following features are specifically set:

[0053] At the rounded edge of each opening and closing plate 6, three guide rods 23 are evenly distributed at equal intervals. At the outer edge of the opening and closing plate 6, connecting ears 24 are formed and fixedly connected to the lower ends of the guide rods 23 one by one. The upper end of each guide rod 23 sequentially penetrates upward through the annular flange 16 and the annular outer edge 14. On the outer wall of the filter box 4, a number of limit sleeves 25 for the guide rods 23 to pass through are formed. A first spring 26 is sleeved on the upper end of each guide rod 23. A gasket bolt 27 is fixedly connected to the top of the guide rod 23. The upper and lower ends of the first spring 26 are respectively in contact with the gasket bolt 27 and the annular outer edge 14. First through holes 28 for the guide rods 23 to pass through are formed on both the annular outer edge 14 and the annular flange 16. A second through hole 29 for the guide rod 23 to pass through is formed on the first sealing ring 17. The diameter of the second through hole 29 is smaller than the rod diameter of the guide rod 23, and the diameter of the first through hole 28 is larger than the rod diameter of the guide rod 23. The diameter of the first through hole 28 is slightly larger than the rod diameter of the guide rod 23, so that the guide rod 23 can pass through smoothly. The second through hole 29 on the sealing ring is in close contact with the outer wall of the guide rod 23 to prevent the water body below from flowing upward through this place.

[0054] During the process of taking away the lifting basket 5 upward, the heightening support 10 gradually loses the downward pressure of the lifting basket 5 on it. Under the elastic force of the first spring 26, the gasket bolt 27 is pushed upward. Since the gasket bolt 27 is fixedly connected to the guide rod 23, the first spring 26 pushes the guide rod 23 upward, thereby driving the opening and closing plate 6 fixedly connected to its lower end to rise rapidly through the guide rod 23 until the opening and closing plate 6 tightly adheres to the bottom of the filter box 4 upward, achieving the purpose of blocking the bottom of the corresponding semi-circular cavity. When the lifting basket 5 is lowered again, the lifting basket 5 gradually sinks under its own weight until its bottom contacts and presses down the heightening support 10, thereby causing the opening and closing plate 6 to move downward. During this process, the opening and closing plate 6 pulls down the guide rod 23 and gradually compresses the first spring 26, thereby realizing the separation of the opening and closing plate 6 from the bottom of the filter box 4.

[0055] In order to ensure that the valve plate 7 can be opened and closed sensitively with the taking and placing of the lifting basket 5, the following features are specifically set:

[0056] The elastic telescopic long rod 9 includes a short sleeve rod 30, a slender rod 31 and a second spring 32. The upper end of the short sleeve rod 30 is hinged to the bottom of the corresponding opening and closing plate 6. The lower end of the slender rod 31 is hinged to the upper surface of the valve plate 7. The upper end of the slender rod 31 is movably inserted into the lower end of the short sleeve rod 30. A spring seat 33 is fixedly sleeved on both the short sleeve rod 30 and the slender rod 31. The upper and lower ends of the second spring 32 are respectively in contact with the two spring seats 33. A strip-shaped pressure relief hole 34 is formed on the side wall of the short sleeve rod 30.

[0057] When the two lifting baskets 5 are both located in the two semicircular cavities in the filter box 4, the two opening and closing plates 6 are at the same height position, and then the same downward pressure is applied to the second spring 32 through their respective short sleeve rods 30, and the downward pressure is transmitted to the slender rod 31 through the second spring 32, and then the same downward pressure is applied to both sides of the rotating shaft of the valve plate 7 through the slender rod 31, thereby ensuring that the valve plate 7 can be in a horizontal state and thus maintain a closed state; and when the position of any one of the opening and closing plates 6 moves up as the lifting basket 5 is taken out, the short sleeve rod 30 moves up accordingly, and at this time the second spring 32 is looser than before, that is, the downward pressure on the slender rod 31 is smaller, which will cause the side of the valve plate 7 where the downward pressure is reduced to flip upward, and then the valve plate 7 changes from the original horizontal state to an inclined state, and at this time the channel for the sediment and sewage to enter the sewage discharger downward is opened.

[0058] In order to ensure that the blower can discharge the waste water as needed during the replacement of the filter balls, the following features are specifically set:

[0059] The sewage discharger is a screw feeder 3, and a rotation sensing switch 35 for detecting the rotation of the shaft of the valve plate 7 is arranged on the outer side of the passive butterfly valve 2. The rotation sensing switch 35 is used to start and stop the screw extruder. The feed port of the screw extruder is connected to the lower end of the passive butterfly valve 2 through a flange adapter plate 36. A through hole 37 with the same diameter as the feed port of the screw extruder is opened at the center of the flange adapter plate 36.

[0060] After the basket 5 is taken out and the valve plate 7 is opened, the sludge flows downward from the through hole 37 into the screw feeder 3. When the valve plate 7 is flipped open, the rotary sensing switch 35 detects that the valve plate 7 is open, and the controller starts the screw feeder 3 to discharge sewage according to the detection signal. When the basket 5 is put back into the filter box 4 and the valve plate 7 is reset and closed, the controller stops the screw feeder 3 according to the signal detected by the rotary sensing switch 35 to avoid unnecessary power consumption, thereby achieving the purpose of sewage discharge on demand.

[0061] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A drainage system water treatment device, characterized in that: The invention comprises a barrel-type open container (1), a passive butterfly valve (2), a drainer, a filter box (4), a basket (5), an opening and closing plate (6), and an adaptive valve plate opening and closing mechanism. The lower end of the barrel-type open container (1) is funnel-shaped. The passive butterfly valve (2) is fixedly connected to the bottom of the barrel-type open container (1). The drainer is fixedly connected to the bottom of the passive butterfly valve (2). The passive butterfly valve (2) has a valve plate (7) that can be turned freely. The filter box (4) is fixedly arranged on the inner upper half of the barrel-type open container (1). The filter box (4) is a longitudinal through-structure and has a partition (8) formed therein for dividing the internal space of the filter box (4) into two. The basket (5) has two parts and is respectively arranged in the filter box (4) through the partition (8). In the cavity, there are two opening and closing plates (6), and the two opening and closing plates (6) are respectively arranged directly below the two baskets (5). The adaptive valve plate opening and closing mechanism comprises two elastic telescopic long rods (9) and two heightening brackets (10). The two heightening brackets (10) are respectively fixedly arranged on the top of the two opening and closing plates (6). The two elastic telescopic long rods (9) are arranged in a vertical state. The upper end of each elastic telescopic long rod (9) is connected to the bottom of the corresponding opening and closing plate (6), and the lower end is connected to the valve plate (7). The two elastic telescopic long rods (9) are symmetrically arranged about the vertical plane where the turning axis of the valve plate (7) is located. The barrel-type open container (1) is provided with a water inlet (11) located below the filter box (4) and a water outlet (12) located above the filter box (4).

2. A drainage system water treatment device according to claim 1, characterized in that: The passive butterfly valve (2) further comprises a double-end flange pipe (13) for mounting a valve plate (7); the upper end of the double-end flange pipe (13) is fixedly connected to the funnel bottom of the barrel-type open container (1), and the lower end is fixedly connected to the top inlet of the sewage outlet; the valve plate (7) is fixedly axially connected to the inner side of the double-end flange pipe (13) for opening and closing the upper and lower sides of the double-end flange pipe (13); the diameter of the double-end flange pipe (13) is consistent with the diameter of the funnel-shaped bottom of the barrel-type open container (1).

3. A drainage system water treatment device according to claim 1, characterized in that: The filter box (4) is a cylindrical structure, the partition (8) divides the inner side of the filter box into two semicircular cavities, the top outer edge of the filter box (4) is formed with an outwardly extending annular outer edge (14), the bottom inner edge of the filter box (4) is formed with an inwardly extending annular inner edge (15), the upper inner wall of the barrel-shaped open container (1) is formed with an annular flange (16) for fixing the annular inner edge, and a first sealing ring (17) is clamped between the annular flange (16) and the annular inner edge.

4. A drainage system water treatment device according to claim 3, characterized in that: The basket (5) is a semi-cylindrical structure. Two baskets (5) are arranged in two semi-circular cavities in a one-to-one correspondence. A grid-shaped strip through hole (18) is formed on the bottom wall of the basket (5). An arc strip (19) extending outwards and used for overlapping the top of the annular outer edge (14) is formed at the top outer edge of the basket (5). A U-shaped handle (20) is fixedly connected to the top of each basket (5).

5. A drainage system water treatment device according to claim 3, characterized in that: The opening and closing plate (6) is semicircular, and a second sealing ring (21) matching the bottom shape of the filter box (4) is attached to the bottom of the annular inner edge. A strip protrusion (22) protruding upward for pressing against the second sealing ring (21) is formed at the top edge of each opening and closing plate (6). The heightening bracket (10) is located at the top center of the top of the opening and closing plate (6), and the heightening bracket (10) upwardly contacts the bottom of the basket (5). When the bottom of the basket (5) contacts the annular inner edge downward, the heightening bracket (10) separates the opening and closing plate (6) downward from the bottom of the filter box (4).

6. A drainage system water treatment device according to claim 3, characterized in that: Three guide rods (23) are evenly spaced and arranged at the circular edge of each of the opening and closing plates (6); connecting ears (24) are formed at the outer edge of the opening and closing plates (6) and are fixedly connected to the lower ends of the guide rods (23); the upper end of each guide rod (23) passes through the annular flange (16) and the annular outer edge (14) in sequence; a plurality of limiting sleeves (25) are formed on the outer wall of the filter box (4) for the guide rods (23) to movably pass through; the upper end of each guide rod (23) is sleeved with a first spring (26); the guide rods (23) are provided with a plurality of stop sleeves (25) and a first spring (26) is provided on the upper end of each guide rod (23); A washer bolt (27) is fixedly connected to the top, and the upper and lower ends of the first spring (26) respectively contact the washer bolt (27) and the annular outer edge (14), and the annular outer edge (14) and the annular flange (16) are both provided with a first through hole (28) for the guide rod (23) to pass through, and the first sealing ring (17) is provided with a second through hole (29) for the guide rod (23) to pass through, wherein the aperture of the second through hole (29) is smaller than the rod diameter of the guide rod (23), and the aperture of the first through hole (28) is larger than the rod diameter of the guide rod (23).

7. A drainage system water treatment device according to claim 1, characterized in that: The elastic telescopic long rod (9) comprises a short sleeve rod (30), a slender rod (31) and a second spring (32); the upper end of the short sleeve rod (30) is hinged to the bottom of the corresponding opening and closing plate (6); the lower end of the slender rod (31) is hinged to the upper surface of the valve plate (7); the upper end of the slender rod (31) is movably inserted into the lower end of the short sleeve rod (30); a spring seat (33) is fixedly sleeved on the short sleeve rod (30) and the slender rod (31); the upper and lower ends of the second spring (32) are respectively pressed against the two spring seats (33); and a strip-shaped pressure relief hole (34) is opened on the side wall of the short sleeve rod (30).

8. A drainage system water treatment device according to claim 1, characterized in that: The sewage discharger is a screw feeder (3), and a rotation sensing switch (35) for detecting the rotation of the rotating shaft of the valve plate (7) is arranged on the outer side of the passive butterfly valve (2). The rotation sensing switch (35) is used to start and stop the screw extruder. The feed port of the screw extruder is connected to the lower end of the passive butterfly valve (2) via a flange adapter plate (36), and a through hole (37) with the same diameter as the feed port of the screw extruder is opened at the center of the flange adapter plate (36).

9. A treatment method based on the drainage system water treatment device according to any one of claims 1 to 8, characterized in that The method The following steps are involved: S1, connecting the water inlet (11) of the device to the preceding rainwater discarding device through a water pump, and continuously pumping the rainwater that has been preliminarily filtered in the rainwater discarding device into the barrel-shaped open container (1) through the water pump; S2, the rainwater pumped by the water pump enters the barrel-shaped open container (1) through the water inlet (11). After entering from the water inlet (11), the rainwater adheres to the wall of the barrel-shaped open container (1) along the tangent direction of the circle. The particle impurities in the rainwater gradually settle downward due to the centrifugal force, and the water gradually passes through the filter barrel upward, and after the porous filter balls filled in the basket (5) absorb smaller particle impurities again, it overflows from the water outlet (12) for subsequent collection; S3, after the device continues to work, the porous filter balls in the basket (5) need to be replaced regularly. When replacing, the porous filter balls in the two baskets (5) are replaced in sequence. First, one of the baskets (5) is taken out and the porous filter balls in it are replaced with new ones. When the basket (5) is taken out, the opening and closing plate (6) below it loses the downward pressure and bounces upward and finally closes and blocks the bottom half of the filter box (4). At the same time, the elastic telescopic long rod (9) below the opening and closing plate (6) also moves upward, thereby causing the pressure on both sides of the valve plate (7) to be unbalanced, and the valve plate (7) changes from a horizontal closed state to an inclined open state. S4, after the valve plate (7) turns from the horizontal closed state to the inclined open state, the sediment settled at the bottom of the barrel-shaped open container (1) flows downward into the sewage discharger, thereby completing the sewage discharge process synchronized with the filter ball replacement process; S5, the new lifting basket (5) is put back into the filter box (4), and the lifting basket (5) on the other side is taken out, and the lower valve plate (7) is opened to discharge sewage. When both lifting baskets (5) are put into the filter box (4), the pressure on both sides of the rotating shaft of the valve plate (7) is balanced, and the valve plate (7) is closed at this time, and the sewage discharge stops.

Images