Drainage filtering structure and self-cleaning gutter inlet structure

Abstract

The invention relates to the technical field of municipal engineering drainage. The invention relates to a gutter inlet structure, in particular to a drainage filtering structure and a self-cleaning gutter inlet structure. According to the self-cleaning gutter inlet structure, suspended solids with large particle sizes are directly intercepted through the pollutant intercepting filter basket in the gutter inlet and prevented from entering an underground pipe network, the pipeline blockage risk is reduced, and the later pipe network maintenance cost is reduced. Meanwhile, pollutants are concentrated in the basket body, and later manual cleaning is also facilitated. By means of intercepting pollutants from the source, non-point source pollution is effectively reduced, water quality is protected, and the method is of great significance to ecological protection of closed or semi-closed water such as lakes and river channels in cities.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal engineering drainage, and more particularly to a drainage filtering structure and a self-cleaning rainwater inlet structure. Background Art

[0002] With the acceleration of urbanization and the increasing risk of flooding during heavy rains, higher requirements are being placed on the drainage efficiency of stormwater inlets. As the "entrance" to the drainage network, the efficiency of stormwater inlets directly affects the operating load of subsequent pipelines and pumping stations. If stormwater inlets fail to drain water in a timely manner, the network's capacity utilization rate will decrease, potentially leading to a supply-demand mismatch of "upstream backlog and downstream vacancy," effectively failing to fully utilize the designed drainage capacity of the entire drainage system.

[0003] If rainwater inlets effectively intercept solid impurities such as fallen leaves, paper scraps, and sediment while collecting rainwater runoff, they can reduce the non-point source pollution burden on the receiving water body to a certain extent, avoiding the occurrence of black and odorous water bodies and eutrophication. However, the grid plate design of traditional rainwater inlets has certain flaws. The grid holes are usually large and cannot effectively filter smaller impurities such as leaves and debris. As a result, a large amount of debris directly enters the well, causing blockage of drainage pipes.

[0004] Manually cleaning sediment from storm drains is difficult to achieve in a timely manner, and manually inspecting each drain for blockages is not only time-consuming and labor-intensive, but also requires frequent work and high maintenance costs. Currently available smart drains primarily integrate liquid level sensors and flow monitoring to provide real-time data for digital drainage system management. However, these technologies are expensive and unsuitable for large-scale deployment.

[0005] To sum up, as the "nerve endings" of the urban drainage system and the first link in collecting surface runoff, how to improve the drainage efficiency of rainwater inlets plays a fundamental supporting role in urban safety, ecological environment and sustainable development. Summary of the Invention

[0006] The purpose of the present invention is to provide a drainage and filtering structure and a self-cleaning gully structure to improve the efficiency of the gully.

[0007] In order to achieve these objects and other advantages according to the present invention, there is provided a drainage filter structure comprising:

[0008] Sewage interception filter basket;

[0009] At least one overflow pipe is spaced apart and arranged in the sewage interception filter basket, and the lower end opening of the overflow pipe is connected to the bottom of the sewage interception filter basket;

[0010] An emergency drain pipe vertically passes through the sewage interception filter basket and is connected thereto, wherein the upper opening of the emergency drain pipe is higher than the upper opening of the overflow pipe and lower than the upper opening of the sewage interception filter basket;

[0011] an axial flow runner rotatably disposed in the emergency drain pipe;

[0012] A brush is arranged below the emergency drain pipe and connected to the axial flow impeller.

[0013] Furthermore, the drainage and filtration structure further includes:

[0014] A mounting frame, which is arranged in the emergency drain pipe;

[0015] a bearing seat, which is arranged on the mounting frame;

[0016] A runner screw is vertically arranged in the emergency drain pipe, and its upper and lower ends are coaxially connected to the bearing seat and the axial flow runner respectively;

[0017] A flow guide cover is coaxially arranged with the axial flow runner and fixed on the mounting frame to guide the water flow entering the emergency drain pipe to the axial flow runner.

[0018] Furthermore, in the drainage filtration structure, the guide cover is a conical guide cover.

[0019] Furthermore, in the drainage and filtration structure, the mounting frame includes:

[0020] A plurality of fixed screw rods are evenly distributed along the circumference of the emergency drain pipe and arranged along the radial direction of the emergency drain pipe;

[0021] A fixed steel plate, one end of the fixed screw rod is connected to the fixed steel plate, and the other end is connected to the emergency drain pipe, and the deflector cover and the bearing seat are respectively arranged at the upper and lower ends of the fixed steel plate.

[0022] Furthermore, in the drainage and filtering structure, a filter screen is provided at the upper end of the overflow pipe.

[0023] Furthermore, in the drainage filter structure, the brush includes:

[0024] The connecting rod is arranged horizontally, and the middle part thereof is connected to the axial flow runner, and the lower end thereof is evenly distributed with bristles.

[0025] The present invention also provides a self-cleaning rainwater inlet structure, comprising a well body and a rainwater grate arranged at the wellhead of the well body, and also comprising a drainage filter structure as described in any of the above items, wherein the sewage interception filter basket is detachably installed in the well body, and the lower end of the brush extends to the bottom of the well body.

[0026] Furthermore, in the self-cleaning rainwater inlet structure, an annular support is provided on the inner wall of the well body, and an outer flange is provided on the upper end of the sewage interception filter basket, and the basket is placed on the annular support through the outer flange.

[0027] Furthermore, the self-cleaning gully structure further comprises:

[0028] a float, which is arranged above the emergency drain pipe;

[0029] A limit frame, which is arranged at the upper end of the emergency drain pipe and is slidably connected to the float to limit the movement of the float in the vertical direction;

[0030] The warning device is arranged at the lower end of the rain grate, and its switch button is located above the float.

[0031] Furthermore, in the self-cleaning rainwater inlet structure, the limiting frame includes:

[0032] A fixing rod, which is arranged at the upper end of the emergency drain pipe;

[0033] A vertical rod is vertically arranged on the fixing rod, and the vertical rod passes through the floating ball and is slidably connected with the floating ball.

[0034] Furthermore, in the self-cleaning rainwater inlet structure, the warning device includes:

[0035] A connecting member, on which a slide groove is horizontally provided along a first direction, and an upper limit hole and a lower limit hole are provided on the top wall and the bottom wall of the slide groove;

[0036] A warning card is slidably disposed in the slide groove along a first direction, and a strip-shaped through groove is provided in the middle of the warning card along the first direction;

[0037] at least two first springs, the warning card being provided with a plurality of notches equal in number to and corresponding to the number of the first springs, the first springs being arranged in the notches along a first direction, one end of the first springs being connected to the inner wall of the chute, and the other end of the first springs being connected to the inner wall of the notch;

[0038] A positioning member vertically passes through the strip-shaped through slot, an outer flange is provided on the upper end of the positioning member, and the outer flange is slidably arranged in the upper limit hole, a card slot matching the outer flange is provided on the upper end of the warning card, and the lower end of the positioning member passes through the lower limit hole and is connected to a switch button;

[0039] The second spring is vertically arranged in the upper limit hole, and its two ends are respectively connected to the connecting member and the positioning member.

[0040] The beneficial effects of the present invention are:

[0041] 1. In the self-cleaning gully structure of this invention, a filter basket within the gully directly intercepts larger suspended solids (such as garbage and debris), preventing them from entering the underground pipe network. This reduces the risk of pipe blockage and reduces subsequent pipe network maintenance costs. Pollutants are also concentrated within the basket, facilitating subsequent manual cleaning. By intercepting pollutants at the source, non-point source pollution is effectively reduced, protecting water quality, and is particularly significant for the ecological protection of enclosed or semi-enclosed water bodies such as urban lakes and rivers.

[0042] 2. The self-cleaning gully structure of the present invention utilizes the principles of fluid mechanics to hydraulically flush the well bottom. Rainwater in the emergency drain pipe simultaneously drives an axial-flow impeller, which in turn rotates a brush at its lower end, effectively cleaning the well bottom. This significantly reduces the likelihood of clogging at the well bottom and drain pipe, and reduces the frequency and workload of manual well cleaning. By combining the interception filter basket with fluid mechanics self-cleaning, the present invention eliminates the need for rainwater sludge troughs, improving drainage efficiency while also reducing the cost of the gully construction project.

[0043] 3. The self-cleaning rainwater outlet structure of the present invention is provided with a warning device. Through the automatic visual prompt function, there is no need to manually open the rainwater grates for inspection one by one, which reduces the frequency and intensity of manual inspections, reduces the overall manual maintenance cost, and liberates manpower from repetitive labor to more complex system management, which meets the needs of refined urban management.

[0044] 4. In the self-cleaning gully structure of the present invention, the self-cleaning and visual prompt functions are both power-free, which can reduce energy consumption (such as liquid level sensing, data monitoring, vehicle transportation, equipment use) and manpower carbon footprint during the operation and manual maintenance of the gully. At the same time, by reducing the probability of clogging, the life of urban pipeline facilities is extended, meeting the requirements of green infrastructure construction.

[0045] 5. The self-cleaning rainwater inlet structure of the present invention is green and low-carbon, and has a negligible impact on the increase in project cost, but has a significant direct and indirect positive impact on the entire rainwater pipe network ecology, and is suitable for large-scale promotion and application.

[0046] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic structural diagram of the drainage filtration structure of the present invention;

[0048] Figure 2 A top view of the sewage interception filter basket according to the present invention;

[0049] Figure 3A bottom view of the sewage filtering basket according to the present application;

[0050] Figure 4 A structural schematic view of the self-cleaning gutter structure according to the present application;

[0051] Figure 5 A structural schematic view of the self-cleaning gutter structure according to the present application;

[0052] Figure 6 A structural schematic view of the self-cleaning gutter structure according to the present application;

[0053] Figure 7 A structural schematic view of the gutter grating according to the present application;

[0054] Figure 8 A structural schematic view of the warning device according to the present application;

[0055] Figure 9 A structural schematic view of the warning device according to the present application;

[0056] Figure 10 A structural schematic view of the warning device according to the present application;

[0057] Figure 11 A structural schematic view of the warning device according to the present application.

[0058] In the drawings, reference numerals indicate:

[0059] Sewage filtering basket 1; overflow pipe 2; emergency drain pipe 3; axial flow runner 4; mounting frame 5; bearing seat 6; runner screw 7; flow guide cover 8; fixed screw 9; fixed steel sheet 10; filter screen 11; connecting rod 12; brush 13; well body 14; gutter grating 15; annular support 16; floating ball 17; warning device 18; fixed rod 19; vertical rod 20; connecting piece 21; sliding groove 22; upper limit hole 23; lower limit hole 24; warning card 25; strip-shaped through groove 26; first spring 27; notch 28; positioning piece 29; horizontally extending part 30; clamping groove 31; switch button 32; second spring 33. DETAILED DESCRIPTION

[0060] The present application will be further described in detail below with reference to examples, so that those skilled in the art can implement the present application according to the description.

[0061] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides a drainage filter structure, comprising:

[0063] Trash filter basket 1, such as Figure 2 and Figure 3 As shown, the interception filter basket 1 is made of a filter mesh, which can intercept larger suspended matter (such as garbage and debris) in the rainwater runoff, and the clean rainwater after interception and filtration is discharged into the well body 14 through the hollow part on the interception filter basket 1;

[0064] At least one overflow pipe 2 is spaced apart and arranged in the sewage interception filter basket 1, wherein the upper opening of the overflow pipe 2 is lower than the upper opening of the sewage interception filter basket 1, and the lower opening is communicated with the bottom of the sewage interception filter basket 1;

[0065] An emergency drain pipe 3 vertically passes through the sewage interception filter basket 1 and is connected thereto, wherein the upper opening of the emergency drain pipe 3 is higher than the upper opening of the overflow pipe 2 and lower than the upper opening of the sewage interception filter basket 1;

[0066] an axial flow runner 4 rotatably disposed in the emergency drain pipe 3;

[0067] A brush is arranged below the emergency drain pipe 3 and connected to the axial flow impeller 4 .

[0068] In this embodiment, a drainage filter structure is disposed within a well 14, with a sewage interception filter basket 1 intercepting the well 14 at the top and bottom. Rainwater runoff entering the well 14 falls into the sewage interception filter basket 1, which intercepts larger suspended solids (such as garbage and debris) in the rainwater runoff. Clean rainwater, after interception and filtration, is discharged into the well 14 through the hollowed-out portion of the sewage interception filter basket 1. After a period of use, the drainage filter structure gradually becomes clogged due to the large amount of pollutants it intercepts. At this time, the water level within the sewage interception filter basket 1 rises, submerging the overflow pipe 2. Clean rainwater then overflows the overflow pipe 2, converting gravitational potential energy into kinetic energy. This allows the rainwater discharged from the overflow pipe 2 to have a certain flow rate, effectively flushing the well bottom as it flows toward the well bottom. As the intercepted waste increases again, exceeding the drainage capacity of overflow pipe 2, a drainage accident occurs. When overflow pipe 2 cannot drain the rainwater in interception filter basket 1 in time, the water level in interception filter basket 1 continues to rise until it submerges the accident drain pipe 3. At this time, the rainwater in interception filter basket 1 is discharged through the accident drain pipe 3. When the water in the accident drain pipe 3 falls on the axial flow runner 4, it drives it to rotate, driving the brush at the lower end of the axial flow runner 4 to rotate synchronously. The lower end of the brush extends to the bottom of the well to perform self-cleaning, greatly reducing the possibility of blockage at the well bottom and the drain pipe.

[0069] like Figure 2 and Figure 3 As shown, four overflow pipes 2 are provided, corresponding to the four right angles at the bottom of the well. This allows rainwater discharged from the four overflow pipes 2 to flush the four corners of the well bottom. The emergency drain pipe 3 is provided in the middle of the interception filter basket 1. Rainwater discharged from the drain pipes flushes the middle of the well bottom.

[0070] Preferably, as another embodiment of the present invention, it further includes:

[0071] A mounting frame 5, which is arranged in the emergency drain pipe 3;

[0072] A bearing seat 6 is provided on the mounting frame 5;

[0073] a runner screw 7, which is vertically arranged in the emergency drain pipe 3, and whose upper and lower ends are coaxially connected to the bearing seat 6 and the axial flow runner 4 respectively;

[0074] The deflector 8 is coaxially arranged with the axial flow runner 4 and fixed on the mounting frame 5 to guide the water flow entering the emergency drain pipe 3 to the axial flow runner 4 .

[0075] In this embodiment, the water flow in the emergency drain pipe 3 is guided by the deflector 8 so that the water falls onto the axial flow runner 4 as much as possible, thereby increasing the rotation speed of the axial flow runner 4.

[0076] Preferably, as another embodiment of the present invention, the air guide cover 8 is a conical air guide cover 8 .

[0077] In this embodiment, the deflector 8 is a conical deflector 8, which is arranged along the axis of the impeller screw 7. The impeller screw 7 is coaxially arranged in the emergency drain pipe 3, so that the rainwater is evenly diverted outward through the conical surface at the upper end of the deflector 8, so that the water falling at any angle position falls from the gap between the deflector 8 and the emergency drain pipe 3, and finally falls on the axial flow impeller 4.

[0078] Preferably, as another embodiment of the present invention, the mounting frame 5 includes:

[0079] A plurality of fixed screw rods 9, which are evenly distributed along the circumference of the emergency drain pipe 3 and arranged along the radial direction of the emergency drain pipe 3;

[0080] A fixed steel plate, one end of the fixed screw rod 9 is connected to the fixed steel plate, and the other end thereof is connected to the emergency drain pipe 3, and the deflector 8 and the bearing seat 6 are respectively arranged at the upper and lower ends of the fixed steel plate.

[0081] In this embodiment, the steel sheet is fixed by a plurality of fixing screw rods 9 , which reduces the area occupied by the mounting frame 5 in the vertical direction, thereby reducing the obstruction to the falling water flow in the emergency drain pipe 3 .

[0082] Preferably, as another embodiment of the present invention, a filter screen 11 is provided at the upper end of the overflow pipe 2 .

[0083] In this embodiment, a filter screen 11 is provided at the upper end of the overflow pipe 2 to prevent suspended matter in the sewage filter basket 1 from entering the overflow pipe 2 and clogging the overflow pipe 2 .

[0084] Preferably, as another embodiment of the present invention, the brush includes:

[0085] The connecting rod 12 is horizontally arranged, and the middle part thereof is connected to the axial flow runner 4 , and the lower end thereof is uniformly distributed with bristles 13 .

[0086] In this embodiment, Figure 1 As shown, the middle part of the lower end of the axial flow runner 4 stretches out the emergency drain pipe 3, and the connecting rod 12 is connected thereto and rotates together therewith. During the rotation of the connecting rod 12, the bristles 13 at its lower end form a circular cleaning surface.

[0087] like Figure 4-Figure 7 As shown, an embodiment of the present invention further provides a self-cleaning rainwater inlet structure, comprising a well body 14 and a rainwater grate 15 arranged at the wellhead of the well body 14, and a drainage filter structure as described in any of the above items, wherein the sewage interception filter basket 1 is detachably installed in the well body 14, and the lower end of the brush extends to the bottom of the well body 14.

[0088] In this embodiment, the interception filter basket 1 is detachably disposed within the well body 14, making it easy to remove and clean manually without requiring excessive maintenance on the interior of the well body 14. Specifically, an annular support 16 is provided on the inner wall of the well body 14, and the interception filter basket 1 is provided with an outer flange at its upper end and rests on the annular support 16 via the outer flange.

[0089] The amount of rainwater runoff collected by the rainwater grate is Q1; the drainage capacity of the sewage filter basket 1 relying on the filter holes at the lower end is Q2; the total drainage capacity of the overflow pipe 2 is Q3; and the drainage capacity of the emergency drainage pipe 3 is Q4.

[0090] In the early stage of using the rainwater outlet, Figure 4 As shown, Q1≤Q2, all rainwater runoff can pass through the interception filter basket 1, which intercepts larger suspended matter (such as garbage and debris) in the rainwater runoff. The clean rainwater after interception and filtration by the interception filter basket 1 is discharged into the well body 14 and enters the municipal rainwater pipe network through the drainage pipe at the bottom of the rainwater outlet.

[0091] like Figure 5 As shown, after the drainage filter structure has been used for a period of time, the interception filter basket 1 intercepts enough pollutants and gradually becomes clogged. At this point, Q1>Q2, and the water level in the interception filter basket 1 rises to submerge the overflow pipe 2. At this point, dynamic equilibrium is reached, i.e., Q1=Q2+Q3. Clean rainwater now overflows and drains from the overflow pipe 2.

[0092] like Figure 6 As shown, as the intercepted dirt increases again, Q2 gradually approaches 0. At this time, Q1>Q3, causing the water level in the intercepting filter basket 1 to submerge the outlet of the overflow pipe 2 and rise again.

[0093] like Figure 7 As shown, when the water level reaches the height of the opening of the emergency drain pipe 3, a drainage accident occurs, and rainwater is discharged through the emergency drain pipe 3. At this time, dynamic equilibrium is achieved, that is, Q1 = Q3 + Q4. When the water in the emergency drain pipe 3 falls on the axial flow runner 4, it drives its rotation, driving the brush at the lower end of the axial flow runner 4 to rotate synchronously, cleaning the bottom of the well body 14 and greatly reducing the possibility of clogging at the bottom of the well body 14 and the drain pipe. When the brush rotates, in addition to cleaning the bottom of the well body 14, it also stirs the rainwater at the bottom of the well body 14, accelerating its flow, thereby making the well body 14 drain faster.

[0094] Preferably, as another embodiment of the present invention, it further includes:

[0095] A float 17 is provided above the emergency drain pipe 3;

[0096] A limit frame is provided at the upper end of the emergency drain pipe 3 and is slidably connected to the float 17 to limit the movement of the float 17 in the vertical direction;

[0097] The warning device 18 is arranged at the lower end of the rain grate 15, and its switch button 32 is located above the float 17. Figure 7 As shown, the middle part of the rain grate has a watertight sealing part, and the warning device 18 is arranged at the lower end of the sealing part.

[0098] In this embodiment, as the amount of intercepted material in the filter basket 1 increases further, Q3 gradually approaches zero. At this point, Q1 > Q4, causing the water level in the filter basket 1 to submerge the outlet of the emergency drain pipe 3 and rise again. The rising water level simultaneously drives the float 17 upward until its upper end contacts the switch button 32 at the lower end of the warning device 18. This gradually compresses the switch button 32, triggering the warning device 18 to activate and eject a warning card 25. The warning card 25 is colored in the project's color and visible through the gaps in the rainwater comb when workers pass over the well 14. This visual signal indicates that the filter basket is sufficiently clogged, requiring manual cleaning, even after the rainwater recedes from the well 14. At this point, the filter basket can be manually removed from the rainwater comb for cleaning, eliminating the need for excessive maintenance inside the well 14. After the float 17 separates from the switch button 32 at the lower end of the warning device 18, the ejected warning card 25 returns to its original position within the warning device 18.

[0099] The sealing portion is located above the warning device 18, that is, above the accident drain pipe 3. The horizontal projection area of ​​the sealing portion is set to be smaller than the horizontal projection area of ​​the accident drain pipe 3. In this way, when the rainwater runoff is particularly large, the rainwater flowing to the edge of the sealing portion can pass through the rainwater comb and fall directly into the accident drain pipe 3, thereby accelerating the drainage speed of the well body 14.

[0100] Preferably, as another embodiment of the present invention, the limiting frame includes:

[0101] A fixing rod 19, which is arranged at the upper end of the emergency drain pipe 3;

[0102] The vertical rod 20 is vertically arranged on the fixed rod 19. The vertical rod 20 passes through the float 17 and is slidably connected thereto.

[0103] In this embodiment, the vertical rod 20 is fixed by the fixing rod 19 , and the float 17 slides up and down on the vertical rod 20 to ensure the movement trajectory of the float 17 .

[0104] Preferably, as another embodiment of the present invention, Figures 8-11 As shown, the warning device includes:

[0105] The connecting member 21 has a slide groove 22 horizontally provided along a first direction, and an upper limit hole 23 and a lower limit hole 24 are provided on the top wall and the bottom wall of the slide groove 22;

[0106] A warning card 25 is slidably disposed in the slide slot 22 along a first direction, and a strip-shaped through slot 26 is provided in the middle of the warning card 25 along the first direction;

[0107] At least two first springs 27, the warning card 25 is provided with a plurality of notches 28, which are equal in number to and correspond to the number of the first springs 27, and the first springs 27 are arranged in the notches 28 along the first direction, with one end of each first spring connected to the inner wall of the chute 22 and the other end of each first spring connected to the inner wall of the notch 28;

[0108] A positioning member 29 vertically passes through the strip-shaped through-slot 26 . A horizontal extension portion 30 is provided at the upper end of the positioning member 29 . The horizontal extension portion 30 is slidably disposed in the upper limit hole 23 . A slot 31 matching the horizontal extension portion 30 is provided at the upper end of the warning card 25 . The lower end of the positioning member 29 passes through the lower limit hole 24 and is connected to a switch button 32 .

[0109] The second spring 33 is vertically disposed in the upper limit hole 23 , and its two ends are connected to the connecting member 21 and the positioning member 29 respectively.

[0110] In this embodiment, Figure 8 and Figure 9 As shown, when the warning card 25 is completely received in the slide groove 22, the first spring 27 is compressed, and the positioning member 29 moves downward under the combined action of gravity and the downward force of the second spring 33, until the horizontal extension portion 30 is embedded in the slot 31 at the upper end of the warning card 25. At this time, the warning card 25 is restricted and cannot slide to the outside of the connecting member 21. When the float 17 moves upward until it contacts the switch button 32, and drives the switch button 32 and the positioning member 29 to move upward, the second spring 33 is compressed. During the upward movement of the positioning member 29, the horizontal extension portion 30 leaves the slot 31 and moves upward to the upper limit hole 23. At this time, the restriction of the horizontal extension portion 30 on the warning card 25 is released, and the warning card 25 slides outward under the action of the first spring 27. During the movement, due to the presence of the bar-shaped through groove 26, the positioning member 29 will not hinder the movement of the warning card 25. As shown Figure 10 and Figure 11As shown, until its most of the movement to the connector 21 outside. And in the re- warning card 25 is housed in the chute 22, remove the ball, first with the hand to push the warning card 25, so that the warning card 25 and the chute 22 side wall to touch, the positioning member 29 is no longer subject to the ball on its upward force, the positioning member 29 in the gravity and the second spring 33 on its downward force of the joint action of the downward movement, until the horizontal extension 30 embedded in the card slot 31 on the upper end of the warning card 25, namely the warning card 25 is housed in the connector 21.

[0111] Although embodiments of the application have been disclosed in connection with the above specification and drawings it will be understood that they are not limited to the specific details described therein but rather can be applied to any embodiments that are within the scope of the application as defined in the claims and equivalents thereof.

Claims

1. A drainage filtration structure, characterized in that: include: Sewage interception filter basket; At least one overflow pipe is spaced apart and arranged in the sewage interception filter basket, and the lower end opening of the overflow pipe is connected to the bottom of the sewage interception filter basket; An emergency drain pipe vertically passes through the sewage interception filter basket and is connected thereto, wherein the upper opening of the emergency drain pipe is higher than the upper opening of the overflow pipe and lower than the upper opening of the sewage interception filter basket; an axial flow runner rotatably disposed in the emergency drain pipe; A brush is arranged below the emergency drain pipe and connected to the axial flow impeller.

2. A drainage filter structure according to claim 1, characterized in that: Also includes: A mounting frame, which is arranged in the emergency drain pipe; a bearing seat, which is arranged on the mounting frame; A runner screw is vertically arranged in the emergency drain pipe, and its upper and lower ends are coaxially connected to the bearing seat and the axial flow runner respectively; A flow guide cover is coaxially arranged with the axial flow runner and fixed on the mounting frame to guide the water flow entering the emergency drain pipe to the axial flow runner.

3. A drainage filter structure according to claim 2, characterized in that: The air guide cover is a conical air guide cover.

4. A drainage filter structure according to claim 2, characterized in that: The mounting frame comprises: A plurality of fixed screw rods are evenly distributed along the circumference of the emergency drain pipe and arranged along the radial direction of the emergency drain pipe; A fixed steel plate, one end of the fixed screw rod is connected to the fixed steel plate, and the other end is connected to the emergency drainage pipe, and the deflector cover and the bearing seat are respectively arranged at the upper and lower ends of the fixed steel plate.

5. A drainage filter structure according to claim 1, characterized in that: A filter is provided at the upper end of the overflow pipe.

6. A self-cleaning rainwater inlet structure, comprising a well body and a rainwater grate arranged at the wellhead of the well body, characterized in that: It also includes the drainage filter structure according to any one of claims 1 to 5, wherein the sewage interception filter basket is detachably installed in the well body, and the lower end of the brush extends to the bottom of the well body.

7. A self-cleaning gully structure according to claim 6, characterized in that: An annular support is provided on the inner wall of the well body, and an outer flange is provided on the upper end of the sewage interception filter basket, and the filter basket is placed on the annular support through the outer flange.

8. The self-cleaning gully structure according to claim 6, characterized in that: Also includes: a float, which is arranged above the emergency drain pipe; A limit frame, which is arranged at the upper end of the emergency drain pipe and is slidably connected to the float to limit the movement of the float in the vertical direction; The warning device is arranged at the lower end of the rain grate, and its switch button is located above the float.

9. A self-cleaning gully structure according to claim 8, characterized in that: The limiting frame includes: A fixing rod, which is arranged at the upper end of the emergency drain pipe; A vertical rod is vertically arranged on the fixing rod, and the vertical rod passes through the floating ball and is slidably connected with the floating ball.

10. The self-cleaning gully structure according to claim 8, characterized in that: The warning device comprises: A connecting member, on which a slide groove is horizontally provided along a first direction, and an upper limit hole and a lower limit hole are provided on the top wall and the bottom wall of the slide groove; A warning card is slidably disposed in the slide groove along a first direction, and a strip-shaped through groove is provided in the middle of the warning card along the first direction; at least two first springs, the warning card being provided with a plurality of notches equal in number to and corresponding to the number of the first springs, the first springs being arranged in the notches along a first direction, one end of the first springs being connected to the inner wall of the chute, and the other end of the first springs being connected to the inner wall of the notch; A positioning member vertically passes through the strip-shaped through slot, an outer flange is provided on the upper end of the positioning member, and the outer flange is slidably arranged in the upper limit hole, a card slot matching the outer flange is provided on the upper end of the warning card, and the lower end of the positioning member passes through the lower limit hole and is connected to a switch button; The second spring is vertically arranged in the upper limit hole, and its two ends are respectively connected to the connecting member and the positioning member.

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