CN211816793U

CN211816793U - Greening ditch for sponge city

Info

Publication number: CN211816793U
Application number: CN202020412527.6U
Authority: CN
Inventors: 杨钊
Original assignee: Chengdu Sunway Architectural Design Co ltd
Current assignee: Chengdu Sunway Architectural Design Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-10-30
Anticipated expiration: 2030-03-27

Abstract

The utility model relates to a greening ditch for sponge city, which aims to solve the problem that the ditch body is easy to be blocked to cause the accumulated water on the road surface to be discharged in time, and comprises a ditch body and a rainwater grate, wherein a first filter plate and a second filter plate which are respectively provided with a plurality of first drain holes and a plurality of second drain holes are arranged in the ditch body from top to bottom at intervals in sequence; the floating plate is horizontally arranged between the first filter plate and the second filter plate, a plurality of guide holes with diameters larger than the diameters of the guide rods are formed in the floating plate, a first plurality of through rods and a second plurality of through rods are vertically fixed on two sides of the floating plate respectively, the first through rods and the second through rods are coaxial with the first drain holes and the second drain holes respectively, and the diameters of the first through rods and the second through rods are equal to be smaller than the diameters of the first drain holes and the second drain holes respectively. The utility model discloses can reduce the probability that the ditch body is blockked up, the discharge surface ponding of relatively quick.

Description

Greening ditch for sponge city

Technical Field

The utility model belongs to the technical field of the sponge city construction technique and specifically relates to a green ditch for sponge city is related to.

Background

The sponge city is characterized in that the city has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like, absorbs water, stores water, seeps water and purifies water when raining, releases and utilizes the stored water when needed, and realizes the free migration of rainwater in the city. Drainage ditches and greening ditches arranged on two sides of a sponge urban road are important components for timely conveying rainfall to an underground drainage system and preventing urban waterlogging.

The Chinese utility model patent with publication number CN209082647U discloses a greening ditch for sponge cities, which comprises a ditch body and a water storage cavity arranged below the ditch body, a first-stage filter layer, a second-stage filter layer and a water storage filter layer are sequentially arranged between the bottom of the ditch body and the water storage cavity from top to bottom, a first waste collecting net is arranged at the joint of the first-stage filter layer and the ditch body, a second waste collecting net is arranged at the joint of the second-stage filter layer and the rainwater recovery layer, the net diameter of the first waste collecting net is larger than that of the second waste collecting net, the first waste collecting net and the second waste collecting net respectively comprise a mounting shaft and two waste collecting filter nets made of flexible materials, one waste collecting filter net is laid against the side wall of the ditch body or the rainwater recovery layer, and the other waste collecting filter net is laid against the upper surface of the first-stage filter layer or the second-stage filter layer; be equipped with elementary rainwater between one-level filter layer and the second grade filter layer and abandon the flowing layer, follow the lateral wall that the flowing layer was abandoned to elementary rainwater begins to its inside a plurality of that extends formation and municipal sewage pipe network intercommunication abandons the flow pipe, the second grade filter layer with be equipped with the rainwater recovery layer between the retaining filter layer, follow the lateral wall on rainwater recovery layer begins to its inside a plurality of recovery tube that extends formation and sewage purification pipe network intercommunication, the retaining filter layer from the top down includes in proper order and filters the sand bed, the geotechnological cloth layer that permeates water, filter the inside molecular sieve layer that is equipped with of sand bed, follow the lateral wall of retaining chamber begins the level to its outside and extends a plurality of infiltration pipe that forms and secret drainage system intercommunication.

The scheme provides a greening ditch for sponge cities, which discharges water after being subjected to level filtration by arranging a first-level filter layer, a second-level filter layer and a water storage filter layer so as to achieve the purpose of timely drainage; but the scheme is in order to clear up the debris on one-level filter layer and the second grade filter layer the first collection that all includes the useless filter screen of collection made by flexible material is useless to net and the useless net of second collection respectively set up on one-level filter layer and the second grade filter layer upper strata, in long-term use, if fail in time clear up by flexible material the collection made useless when the debris on the filter screen, the useless filter screen of collection probably is blockked up, leads to the drainage effect not good, consequently the utility model provides a new technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a afforestation ditch for sponge city, when its discharge precipitation that can be quick relatively, reduce the probability that the ditch body is blockked up.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a greening ditch for a sponge city comprises a ditch body and a rainwater grate covered on the ditch body, wherein a first filter plate, a second filter plate and a water storage filter layer are sequentially and transversely arranged in the ditch body from top to bottom at intervals, the first filter plate and the second filter plate are respectively provided with a plurality of first drain holes and a plurality of second drain holes, the ditch body is communicated with a plurality of water guide pipes in the direction perpendicular to the length direction of the ditch body, the vertical cross sections of the first filter plate and the second filter plate are W-shaped, two ends of the first filter plate in the width direction of the ditch body extend to form lap joint sections, the lap joint sections are lapped on the end side of an upper opening of the ditch body, a plurality of guide rods with circular cross sections are vertically arranged in the ditch body, one ends of the guide rods are fixed at a wave trough, the other ends of the guide rods are fixed on the water storage filter layer, and; the floating plate is horizontally arranged between the first filter plate and the second filter plate, a plurality of guide holes with the diameter larger than that of the guide rods are formed in the floating plate, the guide rods penetrate through the guide holes, a plurality of water leakage holes are formed in the floating plate, a first through rod and a second through rod are vertically fixed on two sides of the floating plate close to the first filter plate and the second filter plate respectively, the first through rod and the second through rod are coaxial with the first drain hole and the second drain hole respectively, and the diameters of the first through rod and the second through rod are respectively smaller than the diameters of the first drain hole and the second drain hole.

By adopting the technical scheme, the rainwater grate, the filter plate I, the filter plate II and the water storage filter layer are arranged in sequence from top to bottom to form multi-stage filtration on water flowing into the ditch body, so that the water can be guided to different pipe network systems through the water guide pipes while the accumulated water on the road surface is quickly discharged, and the water filtered by the filter plate II can be discharged through the urban pipe network system and can be reused as non-drinking water; the water quality filtered by the water storage filter layer is relatively high, and the water can be directly treated by an urban pipe network system and then recycled; grading utilization is formed, so that accumulated water is quickly discharged, and meanwhile, the utilization rate of water is relatively improved; the vertical sections of the first filter plate and the second filter plate are W-shaped, and impurities are settled in the wave troughs in the long-term use process, so that the water passing effect of wave crests is good for a long time; the floating plate arranged between the first filter plate and the second filter plate floats up and down under the action of water buoyancy, and in the floating process, the first through rod and the second through rod block the first drain hole and the second drain hole to clean up impurities, so that the probability that the ditch body is blocked is reduced, the long-term filtering effect of the first filter plate and the second filter plate is better, and the relatively long-term better drainage effect of the ditch body is guaranteed.

The present invention may be further configured in a preferred embodiment as: the aperture of the first drain hole and the aperture of the second drain hole are gradually reduced from the wave crest wave guide valley.

By adopting the technical scheme, in the long-term use process, sundries are settled on the first filter plate and the second filter plate and are slowly settled in the trough under the impact of accumulated water, so that the probability that the sundries settled in the trough continuously settle through the first drain hole and the second drain hole can be relatively reduced by the first drain hole and the second drain hole with smaller pore diameters at the trough, and the filtering effect of the first filter plate and the second filter plate is good for a long time; the first drain hole and the second drain hole at the wave crest are large in aperture, and the sundries deposition rate is relatively small, so that the water passing effect is relatively good for a long time, and the long-term drainage effect of the ditch body can be guaranteed to be good.

The present invention may be further configured in a preferred embodiment as: the water storage filter layer comprises a water seepage geotextile layer, an activated carbon layer and a filter sand layer which are sequentially overlapped from top to bottom.

Through adopting above-mentioned technical scheme, when water filters through the retaining filter layer, infiltration geotechnological cloth layer, activated carbon layer and filtration sand bed can further reduce the probability that the impurity of aquatic continues to sink to the ditch body bottom, and water filters the back through activated carbon layer, and quality of water is better relatively to the reutilization nature of the water after the retaining filter layer filters is stronger relatively, and the filter effect is better relatively.

The present invention may be further configured in a preferred embodiment as: the guide rod is sleeved with a corrugated isolation layer, one end of the corrugated isolation layer is fixed to the floating plate, and the other end of the corrugated isolation layer is fixed to the first filter plate or the second filter plate.

Through adopting above-mentioned technical scheme, under the buoyancy of water, when the guide plate floated from top to bottom, the flexible while of ripple isolation layer was covered the guide rod simultaneously with the guide hole of seting up on the kickboard, can prevent that the impurity of aquatic from getting into and blockking up in the guide hole, and the effect that floats from top to bottom that leads to the kickboard is not good, and then leads to leading to the clearance effect of leading to pole one and leading to pole two not good.

The present invention may be further configured in a preferred embodiment as: lead to pole one and include rod cover and slide bar, the equal opening in rod cover both ends and one end are fixed in the kickboard, the slide bar slides and connects in the rod cover one end of keeping away from the kickboard.

By adopting the technical scheme, when accumulated water in the ditch body rises, the floating plate floats upwards under the action of water buoyancy, and the first through rod clears sundries blocked by the first drain hole, due to the relative angle of the sundries accumulated at the trough, when the first through rod touches the sundries at the trough, the first through rod contracts, so that the first through rod can be prevented from overturning the sundries at the trough, the sundries at the trough sink are prevented from sinking through the first drain hole, and the filtering effect of the first filter plate is poor; because the sundries accumulated at the wave crest are less, the sundries possibly blocked at the wave crest can be cleaned by the first through rod, so that the relatively long-term better drainage effect of the first drainage hole is ensured.

The present invention may be further configured in a preferred embodiment as: a spring is arranged in the rod sleeve, and two ends of the spring are fixed on the sliding rod and the floating plate respectively.

By adopting the technical scheme, when the first through rod floats upwards under the action of buoyancy to clean sundries blocked by the first drainage hole, the first through rod relatively keeps extending under the action of the spring to prevent the sundries at the wave crest from blocking the first through rod, so that the effect of cleaning the sundries at the wave crest of the first through rod is poor; the elastic force of the spring is small, and the first through rod can still be shortened under the obstruction of relatively more sundries at the wave trough, so that the first through rod is prevented from turning over the sundries at the wave trough; when the buoyancy becomes smaller and the floating plate floats downwards, the first through rod extends under the action of the spring to recover the original length, and the operation is repeated, so that the water passing effect of the first filter plate is ensured to be better for a long time.

The present invention may be further configured in a preferred embodiment as: one end side of the through rod, which is far away from the floating plate, is an inclined surface which inclines downwards towards one wave trough of the filter plate.

By adopting the technical scheme, when the floating plate floats upwards under the action of buoyancy, and the first through rod clears sundries blocked by the first drainage hole, the inclined plane gives sundries component force to the crest, so that the sundries at the crest are rapidly deposited in the trough relatively, the water passing effect of the first drainage hole at the crest is ensured to be good relatively for a long time, and the probability of blockage of the ditch body is reduced while the precipitation is rapidly discharged relatively.

The present invention may be further configured in a preferred embodiment as: one end of the second through rod, which is far away from the floating plate, penetrates through the second water drainage hole and is coaxially fixed with a flexible thin block.

Through adopting above-mentioned technical scheme, buoyancy increase when water, during the kickboard come-up, lead to two rebound of pole, soft thin block warp and pass through the outlet two, when breaking away from outlet two, soft thin block reconversion to the debris that will block up in outlet two is cleared up and is opened, thereby guarantees the drainage effect of filter two and long term preferred relatively.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the rainwater grate is arranged to clean large sundries in water flowing into the ditch body so as to prevent the large sundries from entering the ditch body and influencing the drainage effect of the ditch body, the filter plate I, the filter plate II and the water storage filter layer are sequentially arranged in the ditch body from top to bottom so as to form multi-stage filtration on the water flowing into the ditch body, so that the flow-dividing drainage effect of the ditch body is enhanced while the surface accumulated water is quickly drained, and the water in the ditch body is quickly drained by communicating a plurality of water guide pipes, so that the surface accumulated water is quickly drained integrally; through the arrangement of the floating plate, under the action of buoyancy of water, sundries blocked by the first drain hole and the second drain hole are cleaned through the first through rod and the second through rod which are fixed on the floating plate, so that the first filter plate and the second filter plate are guaranteed to have good drainage effect and good production period, and the probability of blockage of the ditch body is reduced while relatively quickly draining rainfall;

2. be W-shaped through setting up filter one and filter two to make the debris that deposit on filter one and filter two deposit in the trough under the impact of water, make the debris of crest department less relatively, thereby guarantee the relative long-term preferred of drainage effect of filter one and filter two relatively, avoid relatively leading to the not good problem of filter one and filter two drainage effects because of not in time clearing up the debris on filter one and the filter two.

3. The first filter plate, the second filter plate and the water storage filter layer are fixedly connected through the guide rod, so that after the water storage filter device is used for a long time, the three filter plates are taken out of the ditch body through the handle, sundries deposited on the three filter plates are cleaned, the probability that the ditch body is blocked is reduced, and relatively quick drainage of rainfall is guaranteed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the local explosion structure of the present invention, showing the structural relationship between the main floating plate and the first and second filter plates and the water storage filter layer.

Fig. 3 is a schematic view of a partial structure of the present invention, which mainly shows a connection structure of the floating plate and the guide rod.

Fig. 4 is an explosion structure diagram of the first through rod of the present invention.

Reference numerals: 1. a trench body; 11. a first filter plate; 111. a first water drainage hole; 112. a lap joint section; 113. a handle; 12. a second filter plate; 121. a water drainage hole II; 13. a water storage filter layer; 131. a water-permeable geotextile layer; 132. an activated carbon layer; 133. filtering the sand layer; 14. a water conduit; 2. a rainwater grate; 21. an avoidance groove; 3. a guide rod; 4. a floating plate; 41. a guide hole; 42. a water leakage hole; 43. a corrugated isolation layer; 5. a first through rod; 51. a rod sleeve; 52. a slide bar; 53. a spring; 54. a bevel; 6. a second through rod; 61. a soft thin block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a afforestation ditch for sponge city, locate the rainwater grate 2 of ditch body 1 including being the upper shed ditch body 1 and lid, ditch body 1's width is big end to end, from the top down has set gradually filter one 11 in the ditch body 1 at the interval, filter two 12 and retaining filter layer 13, polylith filter one 11, polylith filter two 12 and polylith retaining filter layer 13 are laid along the length direction of ditch body 1, a plurality of outlet holes one 111 and a plurality of outlet holes two 121 have been seted up respectively to filter one 11 and filter two 12, ditch body 1 perpendicular to its length direction intercommunication has many aqueducts 14.

Through setting up rainwater grate 2 with the water that flows into the ditch body 1 on ground filters for the first time, stays the grit on ground, prevents to get into and block up the ditch body 1, leads to ditch body 1 drainage effect not good. The diameter of the first drainage hole 111 is larger than that of the second drainage hole 121, a primary rainwater flow abandoning layer is formed between the first filter plate 11 and the second filter plate 12, the water flowing down through the first drainage hole 111 contains more impurities, and at the moment, a plurality of water guide pipes 14 communicated with the primary rainwater flow abandoning layer lead the water containing more impurities to a sewage purification pipe network to be treated. Form the rainwater recovery layer between filter two 12 and the retaining filter layer 13, through filter 11 one-stage filtration, contain impurity in the water that flows down through outlet two 121 and reduce, and at this moment, many aqueducts 14 with rainwater recovery layer intercommunication lead to city drainage with this layer containing water of relative less impurity, discharge to the river or as non-drinking water, for example: irrigation of vegetation, and the like. A water storage cavity is formed between the water storage filter layer 13 and the bottom of the ditch body 1, after the three-stage filtration through the water storage filter layer 13, the water quality accumulated in the water storage cavity is relatively better, and the water storage cavity is relatively stronger in reutilization after being led to a city drainage system.

The ditch body 1 is communicated with a plurality of water guide pipes 14, so that accumulated water entering the ditch body 1 is discharged, and the purposes of reducing accumulated water on the ground and discharging water in time are achieved; constitute multistage filtration through setting up by rainwater grate 2, filter 11, filter two 12 and retaining filter layer 13, when guaranteeing timely drainage, will flow into the ponding reposition of redundant personnel of ditch body 1, and the reposition of redundant personnel back, through the different water pipe network of many aqueducts 14 direction, for example: sewage purification pipe network to distinguish and utilize the rainwater, reduce whose waste, and reduce follow-up water treatment process simultaneously, the result of use is better relatively.

The water storage filter layer 13 comprises a water permeable geotextile layer 131, an activated carbon layer 132 and a filtering sand layer 133 which are sequentially stacked from top to bottom. Through setting up infiltration geotechnological cloth layer 131, activated carbon layer 132 and filtering sand layer 133 to the debris with aquatic stops in the upper strata of retaining filter layer 13, makes the quality of water after filtering through retaining filter layer 13 better relatively, and secondary usage is stronger relatively, in addition, sets up activated carbon layer 132 and can fetch partial impurity and the smell of aquatic, thereby makes quality of water better relatively.

The cross section of the bottom of the ditch body 1 is trapezoidal so as to increase the water storage capacity of the water storage cavity.

Referring to fig. 2, the vertical cross sections of the first filter plate 11 and the second filter plate 12 are both W-shaped; when water is filtered through the first filter plate 11 and the second filter plate 12, sundries in the water can roll down to the wave troughs of the first filter plate 11 and the second filter plate 12 under the action of impact of the water and self gravity, at the moment, the water passes through the first drain holes 111 and the second drain holes 121 on the wave crests of the first filter plate 11 and the second filter plate 12, so that the accumulation of the sundries blocking the first drain holes 111 or the second drain holes 121 can be relatively reduced in the long-term use process, and the effect of smoothly leaking the water through the first drain holes 111 and the second drain holes 121 is relatively prolonged.

The aperture of the first drain hole 111 and the second drain hole 121 is gradually reduced from the wave crest wave guide valley. In the long-term use process, the sundries accumulated in the trough are relatively more, so the relatively smaller apertures of the first drain hole 111 and the second drain hole 121 positioned in the trough can reduce the probability that the sundries at the trough pass through the positions to leak downwards, and the filtering effect is poor; relatively, the first drain hole 111 and the second drain hole 121 with relatively larger apertures at the wave crests can ensure better filtering effect and simultaneously drain water, namely, the draining effect is relatively better for a long time, so that the relatively long-term property of timely draining is ensured.

Both ends of the first filter plate 11 in the width direction of the ditch body extend to form lap joint sections 112, the lap joint sections 112 are lapped on the upper opening end side of the ditch body 1, and handles 113 are fixed on one sides of the two lap joint sections 112 close to the rainwater grate 2, so that the first filter plate 11 can be taken out smoothly through the handles 113; an evasion groove 21 for placing the handle 113 is formed on the rain strainer 2. A plurality of guide rods 3 with circular cross sections are vertically arranged in the ditch body 1, one end of each guide rod 3 is fixed at the wave trough of the first filter plate 11, the other end of each guide rod 3 is fixed at the water storage filter layer 13, and the middle part of each guide rod 3 is fixed at the second filter plate 12. The first filter plate 11, the second filter plate 12 and the water storage filter layer 13 are fixedly connected through the guide rod 3, when sundries on the first filter plate 11, the second filter plate 12 and the water storage filter layer 13 need to be cleaned, only the rainwater grate 2 needs to be moved away, the first filter plate 11, the second filter plate 12 and the water storage filter layer 13 can be lifted out simultaneously by the aid of the handle 113, after the sundries are cleaned, the first filter plate 11, the second filter plate 12 and the water storage filter layer 13 are placed back through the handle 113, and the novel water storage filter is simple in whole operation and convenient to use.

Referring to fig. 2 and 3, a floating plate 4 is horizontally arranged between a first filter plate 11 and a second filter plate 12, the floating plate 4 is provided with a plurality of guide holes 41 with the diameter larger than that of the guide rods 3, the guide rods 3 penetrate through the guide holes 41, and the floating plate 4 floats up and down under the action of the buoyancy of the sewage; the floating plate 4 is opened with a plurality of water leakage holes 42 so that the water flowing down from the first water leakage hole 111 passes through and flows to the second filter plate 12. The guide rod 3 is sleeved with a corrugated isolation layer 43, the corrugated isolation layer 43 can be made of rubber, one end of the corrugated isolation layer 43 is fixed on the floating plate 4, and the other end of the corrugated isolation layer 43 is fixed on the first filter plate 11 or the second filter plate 12; through ripple isolation layer 43, establish guide rod 3 and the hole 42 that leaks of seting up on kickboard 4 simultaneously cover to guarantee that ripple isolation layer 43 does not influence under the condition that kickboard 4 normally floated, will leak the hole 42 protection, in preventing debris in the water and getting into the hole 42 that leaks, hinder kickboard 4's normal floating, lead to the result of use not good.

Referring to fig. 2 and 4, a plurality of through rods 5 are vertically fixed on one side of the floating plate 4 close to the filter plate 11, and the through rods 5 are coaxial with the drain holes 111 and have a diameter smaller than that of the drain holes 111. When the rainfall is great, the water in the rainwater recovery layer is gradually accumulated, the floating plate 4 floats upwards under the guidance of the guide rod 3 under the effect of the gradual increase of the buoyancy of the water, at the moment, the through rod I5 fixed on the floating plate 4 passes through the first drainage hole 111, and sundries accumulated and blocked on the first drainage hole 111 are cleaned, so that the first drainage hole 111 is in a through hole shape, and the situation that the first drainage hole 111 is blocked by the sundries in the long-term use process is prevented, and the drainage effect is poor.

The end of the first through rod 5 facing away from the floating plate 4 is formed with a slope 54 sloping downward toward the trough of the first filter plate 11. When the floating plate 4 floats upwards under the action of water buoyancy, the first through rod 5 passes through the first drainage hole 111, under the action of the inclined surface 54, the first through rod 5 gives a component force to the sundries at the wave crest relatively towards the wave trough, so that the effect of cleaning the sundries at the wave crest towards the wave trough is relatively better, and in the long-term use process, the drainage speed is relatively higher, and the drainage effect is relatively long-term better.

The first through rod 5 comprises a rod sleeve 51 and a sliding rod 52, two ends of the rod sleeve 51 are both open, one end of the rod sleeve 51 is fixed on the floating plate 4, the sliding rod 52 is connected to one end, far away from the floating plate 4, of the rod sleeve 51 in a sliding mode, and the sliding surfaces of the sliding rod 52 and the rod sleeve 51 are stepped surfaces. In the long-term use process, the accumulated impurities in the wave trough of the filter plate I11 are relatively more, when the floating plate 4 floats upwards under the action of water buoyancy, and the through rod I5 passes through the drain hole I111, the through rod I5 contracts under the obstruction of the relatively more impurities in the wave trough, the accumulated impurities cannot be overturned, so that the impurities move downwards through the drain hole I111 in the wave trough, and the filtering effect is poor; because the sundries at the wave crest are relatively less, the blocking effect is relatively less, and the effect of cleaning the sundries at the wave crest by utilizing the first through rod 5 is still better.

A spring 53 is arranged in the rod sleeve 51, two ends of the spring 53 are respectively fixed on the sliding rod 52 and the floating plate 4, the spring 53 is made of a spring with smaller elasticity and can be made of a stainless steel material, and therefore, the use effect is not good when the spring is prevented from being corroded in the process of long-term water soaking. When the spring 53 is in the natural state, the first through rod 5 is in the extended state. When the floating plate 4 floats upwards, the first through rod 5 passes through the first drain hole 111, under the action of the elastic force of the spring 53, the sundries accumulated at the wave crest of the first filter plate 11 are cleaned better, and the elastic force of the spring 53 is relatively small, so that under the action of the elastic force of the spring 53, the sundries accumulated at the wave trough of the first filter plate 11 are overturned less efficiently, and the filtering effect is still better.

Referring to fig. 2, a plurality of through rods two 6 are vertically fixed on one side of the floating plate 4 close to the filter plate two 12, and the through rods two 6 are coaxial with the drain holes two 121 and have a diameter smaller than that of the drain holes two 121. When the water amount is small, the buoyancy is insufficient, the floating plate 4 which floats on the water surface moves downwards all the time, at the moment, the through rod II 6 which is fixed on the floating plate 4 clears away the sundries which are accumulated and blocked on the drain hole II 121 through the drain hole II 121, so that the drain hole II 121 is ensured to be in a through opening shape, and the problem that the drain effect is poor due to the blockage of the drain hole II 121 by the sundries in the long-term use process is avoided.

Further, one end of the second through rod 6, which is far away from the floating plate 4, penetrates through the second water drainage hole 121 and is coaxially fixed with the flexible thin block 61, the flexible thin block 61 can be made of rubber, and the diameter of the flexible thin block 61 is slightly larger than that of the second water drainage hole 121. When the water amount is large, the floating plate 4 floats upwards under the action of water buoyancy, the through rod II 6 fixed on the floating plate 4 moves upwards and abuts against the drain hole II 121, and when the floating plate 4 continuously floats upwards, the soft thin block 61 deforms and is separated from the drain hole II 121, the blockage and impurities on the drain hole II 121 are recovered and cleaned, so that the blockage of the drain hole II 121 in the long-term use process can be relatively prevented, and the filtering and draining effects are poor; when the floating plate 4 floats downwards, the soft thin block 61 is deformed, and the second through rod 6 passes through the second water drainage hole 121.

In order to prevent the filter plate from moving up and down, the second through rod 6 passing through the second drain hole 121 turns over the sundries at the wave trough of the second filter plate 12, and the second through rod 6 at the wave trough can be removed (not shown in the figure), so that the better filtering effect is relatively ensured.

The implementation principle of the embodiment is as follows: after being filtered by a multi-stage filtering mechanism formed by the rainwater grate 2, the first filtering plate 11, the second filtering plate 12 and the water storage filtering layer 13, water is discharged through the corresponding water guide pipe; in the filtering process, the floating plate 4 floats up and down under the action of water buoyancy, and the first through rod 5 and the second through rod 6 fixed on the floating plate 4 clear up the impurities blocked on the first drain hole 111 and the second drain hole.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a afforestation ditch for sponge city, locates rainwater grate (2) of ditch body (1) including the ditch body (1) and lid, from the top down has violently put filter (11), filter two (12) and retaining filter layer (13) at the interval in proper order in the ditch body (1), a plurality of outlet holes (111) and a plurality of outlet holes two (121) have been seted up respectively in filter (11) and filter two (12), its length direction intercommunication of ditch body (1) perpendicular to has many aqueducts (14), its characterized in that: the vertical cross sections of the first filter plate (11) and the second filter plate (12) are W-shaped, two ends of the first filter plate (11) in the width direction of the groove body extend to form lap joint sections (112), the lap joint sections (112) are lapped on the end side of the upper opening of the groove body (1), a plurality of guide rods (3) with circular cross sections are vertically arranged in the groove body (1), one ends of the guide rods (3) are fixed at the wave troughs of the first filter plate (11), the other ends of the guide rods (3) are fixed on the water storage filter layer (13), and the middle parts of the guide rods (3) are fixed on the second filter plate (12); the floating plate (4) is horizontally arranged between the first filter plate (11) and the second filter plate (12), a plurality of guide holes (41) with the diameter larger than that of the guide rods (3) are formed in the floating plate (4), the guide rods (3) penetrate through the guide holes (41), a plurality of water leakage holes (42) are formed in the floating plate (4), a plurality of through rods I (5) and a plurality of through rods II (6) are vertically fixed on two sides, close to the first filter plate (11) and the second filter plate (12), of the floating plate (4), the through rods I (5) and the through rods II (6) are coaxial with the first drain holes (111) and the second drain holes (121) respectively, and the diameters of the through rods I (5) and the second drain holes (6) are equal to be smaller than the diameters of the first drain holes (111) and the second drain holes (121).

2. A green gutter for a sponge city as claimed in claim 1, characterized in that: the aperture of the first drain hole (111) and the second drain hole (121) is gradually reduced from the crest wave-guiding valley.

3. A green gutter for a sponge city as claimed in claim 1, characterized in that: the water storage filtering layer (13) comprises a water seepage geotextile layer (131), an activated carbon layer (132) and a filtering sand layer (133) which are sequentially overlapped from top to bottom.

4. A green gutter for a sponge city as claimed in claim 1, characterized in that: the guide rod (3) is sleeved with a corrugated isolation layer (43), one end of the corrugated isolation layer (43) is fixed to the floating plate (4), and the other end of the corrugated isolation layer (43) is fixed to the first filter plate (11) or the second filter plate (12).

5. A green gutter for a sponge city as claimed in claim 1, characterized in that: lead to pole one (5) including rod cover (51) and slide bar (52), the equal opening in rod cover (51) both ends and one end are fixed in kickboard (4), slide bar (52) slide and connect in rod cover (51) keep away from the one end of kickboard (4).

6. A green gutter for a sponge city as claimed in claim 5, characterized in that: a spring (53) is arranged in the rod sleeve (51), and two ends of the spring (53) are respectively fixed on the sliding rod (52) and the floating plate (4).

7. A green gutter for a sponge city as claimed in claim 5, characterized in that: and an inclined surface (54) which inclines downwards towards the wave trough of the filter plate I (11) is formed at one end side of the through rod I (5) departing from the floating plate (4).

8. A green gutter for a sponge city as claimed in claim 1, characterized in that: one end of the through rod II (6) far away from the floating plate (4) penetrates through the water drainage hole II (121) and is coaxially fixed with the flexible thin block (61).