CN116623772A

CN116623772A - Sponge city rainwater garden and construction method

Info

Publication number: CN116623772A
Application number: CN202310625611.4A
Authority: CN
Inventors: 吴作浪; 陆薇; 刘丽芳; 席若菊; 何超
Original assignee: Ningbo Lvyin Municipal Garden Co ltd
Current assignee: Ningbo Lvyin Municipal Garden Co ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-08-22
Anticipated expiration: 2043-05-29
Also published as: CN116623772B

Abstract

The application relates to a sponge city rainwater garden and a construction method, wherein the main technical scheme is that the sponge city rainwater garden comprises a prefabricated groove body, a top arch plate, an overflow pipe and a back flushing assembly; the top arch plate is densely distributed with water through holes, the top arch plate is arranged in the middle of the prefabricated groove body, the prefabricated groove body is divided into an upper inner cavity and a lower inner cavity by the top arch plate, a plurality of net barrels, a plurality of first perforated pipes and a plurality of second perforated pipes are arranged in the lower inner cavity, the first perforated pipes are positioned at a gap between two groups of net barrels, the second perforated pipes are positioned below the net barrel at the lowest position, and the first perforated pipes and the second perforated pipes are jointly communicated with a box type joint which is sequentially connected with a drain pipe and a drain well; the mouth of pipe of overflow pipe is higher than the water storage layer, the play water end intercommunication of overflow pipe has temporary storage basin, back flush subassembly is used for annotating the water in the temporary storage basin in first perforated pipe and the second perforated pipe. The application has the effect of reducing the blockage of the rainwater garden.

Description

Sponge city rainwater garden and construction method

Technical Field

The application relates to the field of rainwater gardens, in particular to a sponge city rainwater garden and a construction method.

Background

The sponge city is like a sponge, has good elasticity in the aspects of adapting to environmental changes, dealing with natural disasters and the like, can absorb water, store water, permeate water and purify water when raining, and can release and utilize the stored water when needed.

The rainwater garden is an imaging structure of the sponge city concept, and is an ecologically sustainable rainwater flood control and rainwater utilization facility. Specifically, the rainwater garden is a natural or artificially excavated shallow concave green land, is used for converging and absorbing rainwater from a roof or ground, purifying the rainwater through the comprehensive actions of plants and sandy soil, gradually penetrating into soil, conserving groundwater or supplementing urban water.

The rainwater garden sequentially comprises an aquifer, a covering layer, a planting soil layer, a sand layer and a pebble layer from top to bottom, a perforated pipe is buried in the pebble layer, the perforated pipe is communicated with a drainage well, external rainwater sequentially infiltrates and filters, then is temporarily stored in the pebble layer, and redundant rainwater is discharged into the drainage well through the perforated pipe.

However, in the rainwater infiltration process, particulate matters carried in the rainwater and sand grains in the sand layer can be gradually accumulated on the pebble layer, and after long-time use, more accumulation matters on the pebble layer can greatly prevent the rainwater from infiltration, so that the storage and drainage effects of the rainwater garden are affected.

Disclosure of Invention

The application provides a sponge city rainwater garden and a construction method thereof in order to reduce the blockage of the rainwater garden and maintain the storage and drainage effect of the rainwater garden.

The application provides a sponge city rainwater garden, which adopts the following technical scheme:

a sponge urban rainwater garden comprises a prefabricated groove body, a top arch plate, an overflow pipe and a back flushing assembly; the prefabricated groove body is provided with an upper opening, two opposite groove walls of the prefabricated groove body are obliquely arranged, water through holes are densely distributed on the top arch plate, the top arch plate is arranged in the middle of the prefabricated groove body, the prefabricated groove body is divided into an upper inner cavity and a lower inner cavity, the upper inner cavity of the prefabricated groove body is sequentially provided with a water storage layer, a covering layer, a planting soil layer and a sand layer from top to bottom, and the sand layer covers the upper surface of the top arch plate; the lower inner cavity is internally provided with a plurality of net barrels, a plurality of first perforated pipes and a plurality of second perforated pipes, wherein pebbles are filled in the net barrels, the net barrels are divided into two groups which are distributed vertically at intervals, the net barrels in one group are distributed at intervals along the width direction of the prefabricated groove body, the first perforated pipes are positioned at the gaps between the two groups of net barrels, the second perforated pipes are positioned below the net barrels at the lowest position, and the first perforated pipes and the second perforated pipes are jointly communicated with a box type joint which is sequentially connected with a drain pipe and a drain well; the mouth of pipe of overflow pipe is higher than the water storage layer, the play water end intercommunication of overflow pipe has temporary storage basin, back flush subassembly is used for annotating the water in the temporary storage basin in first perforated pipe and the second perforated pipe.

Through adopting above-mentioned technical scheme, during the normal condition, through the net section of thick bamboo that separates the setting to keep the pebble to the storage filter effect of rainwater, and unnecessary rainwater can be through first perforated pipe and second perforated pipe in order to get into the drainage well.

When the rainwater garden is blocked, the gap formed between the net barrels can be used as a path for guiding rainwater to flow, so that the accumulated matters are guided to be positioned at the gap, at the moment, the backwash assembly is utilized to inject water in the temporary storage water tank into the first perforated pipe and the second perforated pipe, and the first perforated pipe and the second perforated pipe are positioned at the gap between the net barrels, so that the accumulated matters in the gap can be effectively washed out, and the blocking occurrence is reduced.

And, the top arch plate plays the effect of bearing water storage layer, overburden, planting soil layer and sand bed to keep the volume of lower inner chamber stable, with piling up between the reduction net section of thick bamboo, with the shaping of assurance clearance.

Optionally, the back flush subassembly includes inclined tube and switch baffle, one side of temporary storage basin is equipped with the opening, and the switch baffle is located opening department, the cell wall of temporary storage basin is equipped with the piece of opening and close that is used for opening and closing the switch baffle, the upper end and the opening intercommunication of inclined tube, the lower extreme of inclined tube with the upper portion intercommunication of drain pipe.

Through adopting above-mentioned technical scheme, in the normal state, unnecessary rainwater on the aquifer will be transferred to temporary storage water tank through the overflow pipe.

When the rainwater garden is blocked, the opening and closing piece can be utilized to open the switch baffle, so that water of the temporary storage water tank flows into the drain pipe along the inclined pipe under the action of gravity and then reversely flows into the first perforated pipe and the second perforated pipe, and is sprayed outwards from the holes of the first perforated pipe and the second perforated pipe to wash away accumulated matters at the gap between the net barrels, thereby realizing blocking removal.

Optionally, a sand accumulation groove is arranged at the bottom of the prefabricated groove body, a sand screen plate is placed at the notch of the sand accumulation groove, and the second perforated pipe is arranged on the sand screen plate.

By adopting the technical scheme, after the accumulated matters at the gaps between the net drums are washed away, the accumulated matters fall into the sand accumulation groove, so that the condition that the accumulated matters excessively enter the second perforated pipe is reduced, and the sand passing net plate plays a role in supporting the second perforated pipe.

Optionally, the outer wall of the prefabricated groove body is penetrated and fixed with embedded sleeves, each embedded sleeve is respectively arranged in one-to-one correspondence with the net barrel, the net barrel is penetrated and fixed with a connecting pipe, and the connecting pipe is penetrated and arranged in the embedded sleeve.

Through adopting above-mentioned technical scheme, through the cooperation of pre-buried sleeve pipe and connecting pipe, can inject the high position of net section of thick bamboo for can keep stable clearance between the adjacent net section of thick bamboo, with the effect of guaranteeing the guide rainwater.

Optionally, the connecting pipe with be connected through the bearing rotation between the pre-buried sleeve pipe, one side of pre-buried sleeve pipe is provided with the operation cavity, is equipped with drive assembly in the operation cavity, and drive assembly is used for driving the connecting pipe and rotates.

By adopting the technical scheme, along with the infiltration of the rainwater, the accumulation is easier to accumulate on the upper part of the peripheral surface of the net barrel and the upper half part of the filled pebbles, and the net barrel can be rotated by about 180 degrees through the driving assembly, so that the accumulation on the upper part is positioned at the lower part of the net barrel, and therefore, when the rainwater continuously infiltrates downwards and passes through the net barrel, the accumulation is taken away by the rainwater, and the blockage of the net barrel is reduced.

And when the net drum rotates 180 degrees, the accumulated objects on the net drum are closer to the perforated pipes, so that water sprayed in the first perforated pipes and the second perforated pipes can more effectively wash away the accumulated objects, and the occurrence of blockage is further reduced.

Optionally, the operation chamber is communicated with the upper part of the temporary storage water tank, the driving assembly comprises a water wheel and a reduction gearbox, the water wheel is positioned at the upper part of the temporary storage water tank, a power shaft of the water wheel is fixedly connected with an input shaft of the reduction gearbox, the reduction gearbox is provided with two output shafts, and a pinion is fixed on the output shafts; one end of the connecting pipe of each net drum positioned above is fixed with a middle gear, adjacent middle gears are meshed, and one middle gear is meshed with one pinion; one end of the connecting pipe of each net barrel positioned below is fixed with a large gear, adjacent large gears are meshed, and one large gear is meshed with one small gear.

Through adopting above-mentioned technical scheme, the rainwater in the overflow pipe flows into the in-process of temporary storage basin under the action of gravity, and the rainwater is beaten on the water wheels, and the kinetic energy of rainwater turns into the kinetic energy of water wheels pivoted, then through reducing gear box and gear drive to realize the rethread rotation of net section of thick bamboo, thereby be convenient for shift and clear stifled to the position of gathering the thing.

Secondly, through setting up the setting of reducing gear box and gear, can improve the moment of torsion of net section of thick bamboo to the rotation stability of net section of thick bamboo of being convenient for.

And thirdly, by arranging the large gear, the medium gear and the small gear, the transmission ratio can be reasonable, the rotation speed of the net drum above is faster than that of the net drum below, so that more accumulated matters of the net drum above can be timely cleaned, less accumulated matters of the net drum below can be cleaned in a delayed manner, and the transmission torque of the water wheel can be reasonably proportioned.

Optionally, the connecting pipe and the net drum are eccentrically and fixedly arranged; the sliding rods vertically slide in the water through holes, gaps are reserved between the sliding rods and the walls of the water through holes, abutting plates are jointly fixed at the lower ends of the sliding rods, the lower surfaces of the abutting plates abut against the upper parts of a group of net barrels above the sliding rods, and conical springs are sleeved on the sliding rods and used for forcing the sliding rods to move downwards; the upper part of each sliding rod is connected with a plurality of layers of soil loosening nets which are vertically arranged at intervals, the soil loosening nets are positioned in the sand layer, and meshes of each soil loosening net are arranged in a staggered mode.

Through adopting above-mentioned technical scheme, when the net section of thick bamboo rotates, because eccentric setting will drive the butt board up-and-down motion to drive slide bar and loosens the net up-and-down motion, the net of loosens the soil can turn the sand grain in the sand bed, in order to reduce the firm condition emergence of sand bed, thereby improves the infiltration effect of rainwater.

Secondly, because the scarification net is arranged in a plurality of layers and meshes are staggered, the turning uniformity and the turning effect can be greatly improved.

And the conical spring is arranged, so that the sliding rod can be conveniently moved downwards to reset, the relative centering position between the sliding rod and the water through hole can be kept, and the gap between the sliding rod and the water through hole is stable, so that rainwater can conveniently pass through.

Optionally, the connecting pipe and the net drum are eccentrically and fixedly arranged; the net drum is rotatably sleeved with a ring body, the ring body is hinged with a water permeable pipe, the upper part of the water permeable pipe penetrates through the water through hole and is positioned in the sand layer, a gap is reserved between the water permeable pipe and the inner wall of the water through hole, and a plurality of soil poking sheet wheels are arranged on the upper part of the water permeable pipe; the soil poking sheet wheel comprises a wheel body and a plurality of arc-shaped sheets, wherein the wheel body is arranged in a manner of rotating relative to the permeable pipe, and the arc-shaped sheets are fixed on the outer peripheral surface of the wheel body.

Through adopting above-mentioned technical scheme, when the eccentric rotation of net section of thick bamboo, will drive the lower extreme of water permeation tube and reciprocate the swing from top to bottom, then regard the limbers as the fulcrum, utilize lever principle, will drive the comparatively convenient reciprocal swing from top to bottom of water permeation tube to drive and dial native piece wheel and turn from top to bottom left to right in the sand bed, with the condition emergence that reduces the sand bed to set firmly, thereby improve the infiltration effect of rainwater.

And through setting up the arc piece, when the upper end of water permeation pipe moved, the drag on sand bed will be converted into the power that forces wheel body pivoted to further improve and turn the effect.

And the permeable pipe has a permeable effect, so that rainwater can flow into the lower inner cavity conveniently.

The application also provides a construction method of the sponge city rainwater garden, which adopts the following technical scheme:

a construction method of a sponge city rainwater garden comprises the following steps: digging a soil pit and a groove, hoisting a prefabricated groove body into the soil pit, respectively placing a drain pipe, a drain well, a box type joint, a back flushing assembly and an overflow pipe into the groove, and then respectively completing connection assembly of the drain pipe, the drain well, the box type joint, the back flushing assembly and the overflow pipe, and backfilling soil into the groove; placing a second perforated pipe into the lower inner cavity of the prefabricated groove body and installing the second perforated pipe on the box-type joint, then hoisting a group of net drums into the lower inner cavity of the prefabricated groove body, placing the net drums above the second perforated pipe, then placing a first perforated pipe into the lower inner cavity of the prefabricated groove body and installing the first perforated pipe on the box-type joint, abutting the first perforated pipe above the net drums, hoisting another group of net drums into the lower inner cavity of the prefabricated groove body, placing the net drums above the first perforated pipe, and placing spacer blocks between adjacent net drums; hoisting the top arch plate into the prefabricated groove body, and abutting the side edge of the top arch plate against the inner wall of the prefabricated groove body to ensure that a vertical gap is formed between the top arch plate and the net drum; and sequentially paving a sand layer, a planting soil layer, a covering layer and an aquifer on the upper inner cavity of the prefabricated groove body.

Through adopting above-mentioned technical scheme, through placing the cushion, can effectively separate the net section of thick bamboo to form stable clearance.

Optionally, before hoisting the net barrels, an arched limiting pipe is jointly penetrated on each net barrel in the same group, and when the net barrels are hoisted into the prefabricated groove body, two ends of the limiting pipe are respectively abutted to two opposite groove walls of the prefabricated groove body.

Through adopting above-mentioned technical scheme, through setting up arched spacing pipe, its cooperation with the net section of thick bamboo can play the supporting role to the net section of thick bamboo to inject the height of net section of thick bamboo, in order to form stable clearance.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the net barrels, the first perforated pipes, the second perforated pipes and the back flushing assembly, a formed gap between the net barrels is used as a path for guiding rainwater to flow downwards and guiding accumulated objects to be located at the gap, the back flushing assembly can inject water in the temporary storage water tank into the first perforated pipes and the second perforated pipes, and the first perforated pipes and the second perforated pipes are located at the gap between the net barrels, so that flushing of the accumulated objects in the gap can be effectively completed, and blocking can be reduced;

2. through the rotatable characteristic of the net drum, the position of the accumulated matters on the net drum can be changed, so that when rainwater continuously infiltrates downwards and passes through the net drum, the accumulated matters are taken away by the rainwater, and the blockage of the net drum is reduced;

3. through the cooperation of butt board and eccentric net section of thick bamboo, utilize the moment of torsion of net section of thick bamboo to become the kinetic energy of slide bar up-and-down motion to drive the net up-and-down motion that loosens the soil, the net that loosens the soil can turn the sand grain in the sand bed, in order to reduce the condition emergence that the sand bed is firm, thereby improves the infiltration effect of rainwater.

Drawings

Fig. 1 is a sectional view of a rain garden of example 1.

Fig. 2 is a widthwise sectional view of the rain garden of example 1.

Fig. 3 is a sectional view of the rain garden of example 2.

Fig. 4 is a widthwise sectional view of the rainwater garden of example 2.

Fig. 5 is a partial enlarged view at a in fig. 4.

Fig. 6 is a sectional view of the rain garden of example 3.

Fig. 7 is a partial enlarged view at B in fig. 6.

Fig. 8 is a sectional view of the rain garden of example 4.

Fig. 9 is a partial enlarged view at C in fig. 8.

Reference numerals illustrate: 1. prefabricating a groove body; 2. a net drum; 5. a drive assembly; 11. a top arch plate; 111. a water through hole; 12. sand accumulation groove; 121. a sand screen plate; 13. a sand layer; 14. planting a soil layer; 15. a cover layer; 16. an aquifer; 17. embedding a sleeve; 18. a connecting pipe; 21. a limiting tube; 22. a spacer block; 31. a first perforated tube; 32. a second perforated tube; 33. an overflow pipe; 34. a box joint; 35. a drain pipe; 36. a temporary storage water tank; 41. a chute; 42. a switch baffle; 43. an opening and closing member; 50. an operation chamber; 51. a water wheel; 52. a reduction gearbox; 53. a pinion gear; 54. a middle gear; 55. a large gear; 56. a transmission gear; 61. a slide bar; 62. an abutting plate; 63. a scarification net; 64. a conical spring; 65. a ring body; 66. a water permeable pipe; 661. a support rod; 67. a soil shifting sheet wheel; 671. a wheel body; 672. arc-shaped pieces.

Detailed Description

The application is described in further detail below with reference to fig. 1-9.

The embodiment 1 of the application discloses a sponge city rainwater garden.

Referring to fig. 1, the sponge city rainwater garden includes a prefabricated tank body 1, a top arch plate 11, an overflow pipe 33, and a backwash assembly.

The prefabricated groove body 1 is provided with an upper opening, two opposite groove walls of the prefabricated groove body 1 are obliquely arranged, namely the cross section of the prefabricated groove body 1 is in an inverted trapezoid shape, the bottom of the prefabricated groove body 1 is concavely formed with a sand accumulation groove 12, a sand screen 121 is placed at the notch of the sand accumulation groove 12, and the sand screen 121 covers the notch of the Yu Jisha groove 12.

The middle part of top arch bar 11 arches upwards, and top arch bar 11 is prefabricated shaping, and top arch bar 11 is densely covered with water hole 111, and top arch bar 11 is placed in the middle part of prefabricated cell body 1, and the both sides limit of top arch bar 11 is in the opposite cell walls of prefabricated cell body 1 of butt under the effect of gravity respectively.

The top arch plate 11 divides the inner cavity of the prefabricated groove body 1 into an upper inner cavity and a lower inner cavity, and the upper inner cavity of the prefabricated groove body 1 is sequentially provided with an aquifer 16, a covering layer 15, a planting soil layer 14 and a sand layer 13 from top to bottom, wherein the sand layer 13 covers the upper surface of the top arch plate 11.

The aquifer 16 has an area of 9-16 square meters and the vegetation of the aquifer 16 is preferably ornamental perennial herbs or shrubs that are resistant to water, drought and contamination. The cover 15 is made of bark, dead leaf, and mixture of decomposed fiber.

The planting soil layer 14 is selected from surface soil which is not polluted locally, and in order to improve the permeability of the soil, a certain amount of compost can be added to promote the formation of soil aggregates, and water permeable geotextiles (not shown in the figure) are paved between the planting soil layer 14 and the sand layer 13.

The sand grain size of the sand layer 13 is preferably 0.3-0.5mm to filter and purify rainwater.

The lower inner cavity is internally provided with a plurality of net cylinders 2, a plurality of first perforated pipes 31 and a plurality of second perforated pipes 32, pebbles are filled in the net cylinders 2, the particle size of the pebbles is 5-8cm, and the pebbles can be filled in the net cylinders 2 or 70-90%.

The specific arrangement of the net barrel 2, the first perforated pipe 31 and the second perforated pipe 32 is that the net barrel 2, the first perforated pipe 31 and the second perforated pipe 32 are parallel, and the axial directions of the net barrel 2, the first perforated pipe 31 and the second perforated pipe 32 are the length direction of the prefabricated groove body 1. The net barrels 2 are divided into two groups which are vertically distributed at intervals, a plurality of net barrels 2 in one group are distributed at intervals along the width direction of the prefabricated groove body 1, adjacent net barrels 2 are separated by a partition block 22, arched limiting pipes 21 are jointly arranged on the net barrels 2 in a penetrating mode in the same group, namely the limiting pipes 21 penetrate through meshes of the net barrels 2, and two ends of the limiting pipes 21 are respectively abutted to two opposite groove walls of the prefabricated groove body 1 so as to limit the height position of the net barrels 2.

The first perforated pipe 31 has a smaller diameter than the second perforated pipe 32, and the first perforated pipe 31 is located at the gap between the two sets of net drums 2, the second perforated pipe 32 is located below the lowermost net drum 2, and the second perforated pipe 32 is arranged on the sand screen 121.

As shown in fig. 2, a tank wall of the prefabricated tank body 1 is fixedly provided with a tank joint 34 in a penetrating manner, the tank joint 34 is of a tank body structure, the end parts of the first perforated pipe 31 and the second perforated pipe 32 are communicated with the tank joint 34, and the tank joint 34 is sequentially connected with a drain pipe 35 and a drain well (not shown in the figure).

The mouth of pipe of overflow pipe 33 is higher than aquifer 16, and the water outlet end of overflow pipe 33 communicates has temporary storage basin 36, and temporary storage basin 36 buries in the soil body, and the back flush subassembly is used for annotating the water in the temporary storage basin 36 in first perforated pipe 31 and the second perforated pipe 32.

In normal state, rainwater sequentially passes through the aquifer 16, the cover layer 15, the planting soil layer 14 and the sand layer 13 to finish filtering and purifying, then the rainwater enters the net barrel 2 through the water through holes 111 of the top arch plate 11, part of the rainwater flows through pebbles of the net barrel 2 to be filtered and accumulated, and the other part of the rainwater flows through gaps between the upper net barrels 2 to enter the lower net barrel 2 to be filtered and accumulated, and the redundant rainwater flows into a drainage well through the first perforated pipe 31, the second perforated pipe 32, the box type joint 34 and the drainage pipe 35.

When the rainwater is large, the redundant rainwater in the aquifer 16 enters the temporary storage water tank 36 through the overflow pipe 33, the temporary storage water tank 36 can store the rainwater, and when the rainwater is full, the rainwater can overflow into the urban drainage system, so that the filtering, accumulating and discharging of the rainwater are realized.

When a rainwater garden is blocked, because the formed gap between the net barrels 2 can be used as a path for guiding rainwater to flow, most of accumulated matters are guided to be positioned at the gap, then a back flushing assembly is utilized to inject water in the temporary storage water tank 36 into the first perforated pipe 31 and the second perforated pipe 32, the first perforated pipe 31 and the second perforated pipe 32 are positioned at the gap between the net barrels 2, and the water in the temporary storage water tank 36 is reversely sprayed out through the first perforated pipe 31 and the second perforated pipe 32 so as to effectively flush the accumulated matters in the gap between the adjacent net barrels 2, so that the blocking occurrence is reduced.

Specifically, the back flushing assembly comprises an inclined tube 41 and a switch baffle 42, one side of the temporary storage water tank 36 is provided with a through hole, the inclined tube 41 is obliquely arranged, the upper end of the inclined tube 41 is communicated with the through hole, the lower end of the inclined tube 41 is communicated with the upper portion of the drain pipe 35, the switch baffle 42 is located at the through hole, the groove wall of the temporary storage water tank 36 is provided with an opening and closing piece 43 for opening and closing the switch baffle 42, the opening and closing piece 43 can be an air cylinder or a hydraulic cylinder, and the opening and closing piece 43 drives the switch baffle 42 to horizontally move.

When the opening and closing member 43 drives the switch baffle plate 42 to leave the opening and be located in the temporary storage water tank 36, water in the temporary storage water tank 36 flows into the inclined tube 41 through a gap between the switch baffle plate 42 and the opening, water flows into the drain tube 35 along the inclined tube 41 under the action of gravity, then reversely flows into the first perforated tube 31 and the second perforated tube 32, and is sprayed outwards from the holes of the first perforated tube 31 and the second perforated tube 32 so as to wash away the accumulated matters at the gap between the net drums 2, thereby realizing blockage removal, and the washed accumulated matters fall into the sand accumulation tank 12, so that the condition that the accumulated matters excessively enter the second perforated tube 32 is reduced.

Of course, in order to increase the sealing effect between the shutter 42 and the through hole, a sealing strip may be attached to the outer edge of the shutter 42.

Also, in case that gravitational potential energy is insufficient, a water feed pump (not shown) may be disposed on the inclined tube 41 to pressurize the water in the inclined tube 41 in order to increase the pressure and flow rate of the discharged water.

In other embodiments, the backwash assembly may be a combination of a water line for an external water source and connected to the box connector 34 and a transfer pump for directly pressurizing water from the external water source into the box connector 34 for filling into the first perforated tube 31 and the second perforated tube 32.

Embodiment 1 also discloses a construction method of the sponge city rainwater garden, comprising the following steps:

s1, paying off, and then excavating soil pits and grooves.

S2, respectively placing the temporary storage water tank 36, the water drain pipe 35, the water drain well, the box type joint 34, the back flushing assembly and the overflow pipe 33 into the grooves, wherein the box type joint 34 is arranged in a hole on one side wall of the prefabricated tank body 1, then respectively completing the connection assembly of the water drain pipe 35, the water drain well, the box type joint 34, the back flushing assembly and the overflow pipe 33, wherein two ends of the inclined pipe 41 are respectively connected with the middle part of the water drain pipe 35 and a through hole of the temporary storage water tank 36, and the opening and closing piece 43 is arranged on the outer side wall of the temporary storage water tank 36.

S3, backfilling soil into the grooves and the soil pits.

S4, limiting pipes 21 are jointly penetrated on the net drums 2 in the same group so as to connect the net drums 2 in the same group in series, and spacer blocks 22 are placed between the adjacent net drums 2.

S5, placing the second perforated pipe 32 into the lower inner cavity of the prefabricated groove body 1 and installing the second perforated pipe 32 on the box-type joint 34, then hoisting a group of net barrels 2 into the lower inner cavity of the prefabricated groove body 1, placing the net barrels 2 above the second perforated pipe 32, and ensuring that two ends of the limiting pipe 21 are respectively abutted on two opposite groove walls of the prefabricated groove body 1.

Then, the first perforated pipe 31 is placed in the lower inner cavity of the prefabricated groove body 1 and is installed on the box-type joint 34, the first perforated pipe 31 is abutted against the upper side of the net drum 2, the other net drum 2 is hoisted and placed in the lower inner cavity of the prefabricated groove body 1, and the net drum 2 is placed above the first perforated pipe 31.

The top arch plate 11 is hoisted and placed into the prefabricated groove body 1, the side edge of the top arch plate 11 is abutted against the inner wall of the prefabricated groove body 1, and a vertical gap is reserved between the top arch plate 11 and the net drum 2.

S6, sequentially paving a sand layer 13, a planting soil layer 14, a covering layer 15 and an aquifer 16 into the upper inner cavity of the prefabricated groove body 1.

Example 2

Embodiment 2 is different from embodiment 1 in that, as shown in fig. 3, the spacer 22 and the limiting tube 21 in embodiment 1 are omitted, and the concrete installation mode of the net drum 2 is changed to that of fig. 4, the pre-buried sleeve 17 is fixedly arranged on the outer wall of the pre-fabricated groove body 1 in a penetrating manner, the pre-buried sleeve 17 is buried in the soil body, the pre-buried sleeve 17 is respectively arranged on two sides of the pre-fabricated groove body 1 in the length direction, the pre-buried sleeves 17 are respectively arranged in one-to-one correspondence with the net drum 2, and part of the pre-buried sleeve 17 also penetrates through the box-type joint 34, so that a penetrating tube is added at the penetrated hole of the box-type joint 34 to prevent water in the box-type joint 34 from flowing out through the part penetrated by the pre-buried sleeve 17.

The net drum 2 is fixedly penetrated by the connecting pipe 18, the connecting pipe 18 and the net drum 2 are coaxially arranged, the connecting pipe 18 penetrates through the net drum 2, the end part of the connecting pipe 18 penetrates through the embedded sleeve 17, and the connecting pipe 18 is rotationally connected with the embedded sleeve 17 through a bearing, so that the net drum 2 is supported by the cooperation of the embedded sleeve 17 and the connecting pipe 18, the clearance distance between the adjacent net drums 2 is more stable, and the rotatability of the net drum 2 is further realized.

In order to increase the sealing performance, a sealing ring (not shown) may be provided between the connection pipe 18 and the pre-buried sleeve 17.

As shown in fig. 4 and 5, an operation chamber 50 is disposed at one side of the prefabricated tank body 1, the operation chamber 50 may be a prefabricated member or a cast-in-situ member, and is buried in the soil, the operation chamber 50 is communicated with the upper portion of the temporary storage tank 36, one end of the connecting pipe 18 extends into the operation chamber 50, a driving assembly 5 is disposed in the operation chamber 50, and the driving assembly 5 is used for driving the connecting pipe 18 to rotate.

Along with the infiltration of rainwater, in the past, the accumulation is mostly accumulated on the upper part of the peripheral surface of the net barrel 2 and the upper half part of the filled pebbles to cause blockage, and at the moment, the net barrel 2 is rotated by about 180 degrees through the driving component 5, so that the accumulation originally positioned on the upper part of the net barrel 2 is positioned on the lower part of the net barrel 2, and therefore, when the rainwater continuously infiltrates downwards and passes through the net barrel 2, the accumulation is taken away by the rainwater, so that the blockage of the net barrel 2 is reduced.

In other embodiments, the driving component 5 may be a hand wheel, where the hand wheel is mounted on the connecting pipe 18, and the connecting pipe 18 and the net drum 2 are driven to rotate by using a manual mode, and after a large number of growth time is blocked, for example, about 3 years, an operator can enter the operation chamber 50 through the temporary storage water tank 36 after a period of time, and rotate the hand wheel, and in other embodiments, the driving component 5 may be a hydraulic motor, where the hydraulic motor drives the connecting pipe 18 and the net drum 2 to rotate by using a gear transmission mode.

In this embodiment, the driving assembly 5 includes a water wheel 51 and a reduction gearbox 52, the water wheel 51 is located at the upper portion of the temporary storage tank 36, the reduction gearbox 52 is installed in the operation chamber 50, and a power shaft of the water wheel 51 passes through a groove wall of the temporary storage tank 36 and is fixedly connected with an input shaft of the reduction gearbox 52.

The reduction gearbox 52 has two output shafts to which pinion gears 53 are fixed. An intermediate gear 54 is fixed to one end of the connecting tube 18 of each net drum 2 located above, adjacent intermediate gears 54 are meshed, and one intermediate gear 54 is meshed with one pinion 53.

One end of the connecting tube 18 of each net drum 2 positioned below is fixed with a large gear 55, adjacent large gears 55 are meshed, and one large gear 55 is in transmission fit with one small gear 53 through a plurality of transmission gears 56.

In the process that the rainwater in the overflow pipe 33 flows into the temporary storage water tank 36 under the action of gravity, the rainwater is beaten on the water wheel 51, the kinetic energy of the rainwater is converted into the kinetic energy of the rotation of the water wheel 51, and then the kinetic energy is transmitted through the reduction gearbox 52 and the gear, so that the retarded rotation of the net drum 2 is realized, and the position of an accumulated object is conveniently transferred and cleared.

In addition, by providing the reduction gearbox 52, the large gear 55, the middle gear 54 and the small gear 53, the torque of the net drum 2 can be improved, so that the rotation stability of the net drum 2 is facilitated, and the transmission torque of the water wheel 51 can be reasonably proportioned.

Example 3

Embodiment 3 is different from embodiment 2 in that, as shown in fig. 6 and 7, the connection tube 18 is eccentrically fixed to the net drum 2, i.e., the connection tube 18 is not coaxial with the net drum 2, so that the net drum 2 will perform eccentric rotation movement when the connection tube 18 rotates.

The slide bar 61 is vertically slipped in the water through hole 111, and a gap is arranged between the slide bar 61 and the wall of the water through hole 111, and the gap is used for rainwater to flow through. The lower ends of the slide bars 61 are fixed together with an abutting plate 62, the abutting plate 62 is horizontally arranged, and the lower surface of the abutting plate 62 abuts against the upper part of the upper net drum 2.

The sliding rod 61 is sleeved with a conical spring 64, the large end of the conical spring 64 is abutted against the lower surface of the top arch plate 11, the lower end of the conical spring 64 is abutted against the abutting plate 62, and the conical spring 64 is used for forcing the sliding rod 61 to move downwards, so that the abutting plate 62 is always kept in a state of being abutted against the net drum 2.

The upper parts of the sliding rods 61 are positioned in the sand layer 13, the upper parts of the sliding rods 61 are fixedly connected with a plurality of layers of soil loosening nets 63 which are vertically arranged at intervals, the soil loosening nets 63 can be galvanized nets, and the meshes of the soil loosening nets 63 are staggered.

When the net drum 2 eccentrically rotates, the abutting plate 62 is driven to move up and down, so that the sliding rod 61 and the scarification net 63 are driven to move up and down, and at the moment, the scarification net 63 turns sand grains in the sand layer 13, so that the condition that the sand layer 13 is firm is reduced, and the infiltration effect of rainwater is improved.

And because the position of the accumulation can be changed by rotating the net drum 2, the cleaning effect of the rainwater on the accumulation can be improved under the condition that the sand layer 13 loosens and the rainwater infiltration amount is increased, so that the blockage is reduced.

Example 4

The difference between the embodiment 4 and the embodiment 2 is that, as shown in fig. 8 and 9, the middle of the wall of the water through hole 111 protrudes to the middle to form a shape of a thin waist-shaped water through hole 111, the connecting pipe 18 and the net drum 2 are eccentrically and fixedly arranged, and the eccentric distance is about 10-15% of the radius of the net drum 2, namely, the small-amplitude eccentric rotation is performed. The net drum 2 is rotatably sleeved with a ring body 65, the upper part of the ring body 65 is hinged with a permeable pipe 66, the permeable pipe 66 has a structure that holes are densely distributed on the wall of the hole, and external rainwater can permeate into the permeable pipe 66.

The upper part of the water permeable pipe 66 passes through the water passing holes 111 and is positioned in the sand layer 13, and a small gap is formed between the water permeable pipe 66 and the inner wall of the water passing holes 111 so that part of rainwater can pass through, and the freedom of movement of the water permeable pipe 66 is increased.

The upper part of the permeable pipe 66 is provided with a plurality of soil-shifting wheels 67, specifically, the soil-shifting wheels 67 comprise a wheel body 671 and arc-shaped pieces 672, the wheel body 671 is rotationally connected with a supporting rod 661 on the permeable pipe 66, the arc-shaped pieces 672 are provided in a plurality, and the arc-shaped pieces 672 are uniformly fixed on the outer peripheral surface of the wheel body 671.

When the net drum 2 eccentrically rotates, the rotation of the ring body 65 and the hinging of the permeable tube 66 and the use of the waist part of the water through hole 111 as the fulcrum drive the upper end of the permeable tube 66 to reciprocate up and down and left and right, so as to drive the soil shifting sheet wheel 67 to turn up and down and left and right in the sand layer 13, and in the relative movement process, the resistance of the sand layer 13 is converted into the power for forcing the wheel body 671 to rotate, namely the rotating soil shifting sheet wheel 67 further turns up the sand layer 13, so that the occurrence of the condition that the sand layer 13 is firm is reduced, and the infiltration effect of rainwater is improved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A sponge urban rainwater garden, its characterized in that: comprises a prefabricated groove body (1), a top arch plate (11), an overflow pipe (33) and a back flushing assembly; the prefabricated groove body (1) is provided with an upper opening, two opposite groove walls of the prefabricated groove body (1) are obliquely arranged, water through holes (111) are densely distributed in the top arch plate (11), the top arch plate (11) is arranged in the middle of the prefabricated groove body (1), the top arch plate (11) divides the prefabricated groove body (1) into an upper inner cavity and a lower inner cavity, the upper inner cavity of the prefabricated groove body (1) is sequentially provided with a water storage layer (16), a covering layer (15), a planting soil layer (14) and a sand layer (13) from top to bottom, and the sand layer (13) covers the upper surface of the top arch plate (11); the net barrel (2) is divided into two groups which are distributed vertically at intervals, the net barrels (2) in one group are distributed at intervals along the width direction of the prefabricated groove body (1), the first perforated pipes (31) are positioned at the gap between the two groups of net barrels (2), the second perforated pipes (32) are positioned below the lowermost net barrel (2), the first perforated pipes (31) and the second perforated pipes (32) are communicated with box-type connectors (34) together, and the box-type connectors (34) are sequentially connected with a drain pipe (35) and a drain well; the mouth of pipe of overflow pipe (33) is higher than water storage layer (16), the play water end intercommunication of overflow pipe (33) has temporary storage basin (36), back flush subassembly is used for annotating in first perforated pipe (31) and second perforated pipe (32) with the interior water of temporary storage basin (36).

2. The sponge city rainwater garden of claim 1, wherein: the back flushing assembly comprises an inclined tube (41) and a switch baffle (42), one side of the temporary storage water tank (36) is provided with a through hole, the switch baffle (42) is located at the through hole, the groove wall of the temporary storage water tank (36) is provided with an opening and closing piece (43) for opening and closing the switch baffle (42), the upper end of the inclined tube (41) is communicated with the through hole, and the lower end of the inclined tube (41) is communicated with the upper portion of the drain pipe (35).

3. The sponge city rainwater garden of claim 1, wherein: the bottom of the prefabricated groove body (1) is provided with a sand accumulation groove (12), a sand screen (121) is placed at the notch of the sand accumulation groove (12), and the second perforated pipe (32) is arranged on the sand screen (121).

4. A sponge urban stormwater garden as claimed in claim 3, wherein: the outer wall of the prefabricated groove body (1) is fixedly provided with embedded sleeves (17) in a penetrating mode, each embedded sleeve (17) is arranged in one-to-one correspondence with the net drum (2), the net drum (2) is fixedly provided with a connecting pipe (18) in a penetrating mode, and the connecting pipe (18) is arranged in the embedded sleeves (17) in a penetrating mode.

5. The sponge city rainwater garden of claim 4, wherein: the connecting pipe (18) is rotatably connected with the embedded sleeve (17) through a bearing, an operation cavity (50) is arranged on one side of the embedded sleeve (17), a driving assembly (5) is arranged in the operation cavity (50), and the driving assembly (5) is used for driving the connecting pipe (18) to rotate.

6. The sponge city rainwater garden of claim 5, wherein: the operation cavity (50) is communicated with the upper part of the temporary storage water tank (36), the driving assembly (5) comprises a water wheel (51) and a reduction gearbox (52), the water wheel (51) is positioned at the upper part of the temporary storage water tank (36), a power shaft of the water wheel (51) is fixedly connected with an input shaft of the reduction gearbox (52), the reduction gearbox (52) is provided with two output shafts, and a pinion (53) is fixed on the output shafts; one end of the connecting pipe (18) of each net drum (2) positioned above is fixed with a middle gear (54), adjacent middle gears (54) are meshed, and one middle gear (54) is meshed with one pinion (53); one end of the connecting pipe (18) of each net drum (2) positioned below is fixed with a large gear (55), adjacent large gears (55) are meshed, and one large gear (55) is meshed with one small gear (53).

7. The sponge city rainwater garden of claim 5, wherein: the connecting pipe (18) and the net drum (2) are eccentrically and fixedly arranged; a sliding rod (61) is vertically and slidably arranged in the water through hole (111), a gap is reserved between the sliding rod (61) and the wall of the water through hole (111), an abutting plate (62) is commonly fixed at the lower end of each sliding rod (61), the lower surface of each abutting plate (62) abuts against the upper part of a group of net drums (2) above, a conical spring (64) is sleeved on the sliding rod (61), and the conical spring (64) is used for forcing the sliding rod (61) to move downwards; the upper part of each sliding rod (61) is connected with a plurality of layers of soil loosening nets (63) which are vertically arranged at intervals, the soil loosening nets (63) are positioned in the sand layer (13), and meshes of each soil loosening net (63) are arranged in a staggered mode.

8. The sponge city rainwater garden of claim 5, wherein: the connecting pipe (18) and the net drum (2) are eccentrically and fixedly arranged; the net drum (2) is rotationally sleeved with a ring body (65), the ring body (65) is hinged with a water permeable pipe (66), the upper part of the water permeable pipe (66) penetrates through the water permeable hole (111) and is positioned in the sand layer (13), a gap is reserved between the water permeable pipe (66) and the inner wall of the water permeable hole (111), and a plurality of soil shifting sheet wheels (67) are arranged on the upper part of the water permeable pipe (66); the soil poking sheet wheel (67) comprises a wheel body (671) which is rotatably arranged relative to the water permeable pipe (66) and a plurality of arc-shaped sheets (672) which are fixed on the peripheral surface of the wheel body (671).

9. A construction method of a sponge city rainwater garden according to claim 1, characterized in that: the method comprises the following steps: digging a soil pit and a groove, hoisting a prefabricated groove body (1) into the soil pit, respectively putting a drain pipe (35), a drain well, a box-type joint (34), a back flushing assembly and an overflow pipe (33) into the groove, and then respectively completing connection assembly of the drain pipe (35), the drain well, the box-type joint (34), the back flushing assembly and the overflow pipe (33), and backfilling soil into the groove; placing a second perforated pipe (32) into the lower inner cavity of the prefabricated groove body (1) and installing the second perforated pipe on the box-type joint (34), then hoisting a group of net drums (2) into the lower inner cavity of the prefabricated groove body (1), placing the net drums (2) above the second perforated pipe (32), then placing a first perforated pipe (31) into the lower inner cavity of the prefabricated groove body (1) and installing the first perforated pipe (31) on the box-type joint (34), abutting the first perforated pipe (31) above the net drums (2), hoisting another group of net drums (2) into the lower inner cavity of the prefabricated groove body (1), placing the net drums (2) above the first perforated pipe (31), and placing spacer blocks (22) between adjacent net drums (2); hoisting a top arch bar (11) into the prefabricated groove body (1), wherein the side edge of the top arch bar (11) is abutted against the inner wall of the prefabricated groove body (1), and a vertical gap is reserved between the top arch bar (11) and the net drum (2); and a sand layer (13), a planting soil layer (14), a covering layer (15) and an aquifer (16) are sequentially paved on the upper inner cavity of the prefabricated groove body (1).

10. The construction method of the sponge city rainwater garden according to claim 9, wherein: before hoisting the net barrels (2), the arched limiting pipes (21) are jointly penetrated on the net barrels (2) in the same group, and when the net barrels (2) are hoisted into the prefabricated groove body (1), two ends of the limiting pipes (21) are respectively abutted against two opposite groove walls of the prefabricated groove body (1).