Sponge city construction, park green space landscape, water-saving irrigation system

Abstract

This application relates to the field of landscape irrigation, and in particular to a water-saving irrigation system for park green spaces in sponge city construction. The system includes an underground water storage tank, within which a motor electrically connected to a control system is installed. A rotating shaft is coaxially mounted on the motor's output shaft, and a mounting bracket is mounted on the rotating shaft. Multiple sets of ultraviolet germicidal lamps electrically connected to the control system are mounted on the mounting bracket. This application sterilizes rainwater in the water storage tank using ultraviolet germicidal lamps, thereby improving the quality of irrigation water.

Description

Technical Field

[0001] This application relates to the field of landscape irrigation, and in particular to a water-saving irrigation system for park green spaces in sponge city construction. Background Technology

[0002] The water-saving irrigation system for parks and green spaces in sponge city construction is an efficient and environmentally friendly irrigation method that incorporates the concept of sponge cities to achieve the rational use and conservation of water resources.

[0003] The related technology discloses a sponge city rainwater harvesting and recycling system, which includes a water storage tank buried underground for storing rainwater, and the water storage tank is connected to an irrigation device for irrigating the landscape via a water pump.

[0004] Because the water storage tank is buried underground, and rainwater may deteriorate due to prolonged storage in the tank before it is used, leading to bacterial growth and unpleasant odors, it has obvious shortcomings. Summary of the Invention

[0005] In order to improve the water quality of irrigation water, this application provides a water-saving irrigation system for sponge city construction parks and green spaces.

[0006] This application provides a water-saving irrigation system for sponge city construction parks and green spaces, which adopts the following technical solution:

[0007] A water-saving irrigation system for sponge city construction parks and green spaces includes an underground water storage tank. A motor electrically connected to a control system is arranged in the water storage tank. A rotating shaft is coaxially arranged on the output shaft of the motor. A mounting frame is arranged on the rotating shaft. Multiple sets of ultraviolet germicidal lamps electrically connected to the control system are arranged on the mounting frame.

[0008] By adopting the above technical solution, the control system starts the motor periodically. The output shaft of the motor drives the mounting frame to rotate, and multiple ultraviolet germicidal lamps rotate accordingly. Under the irradiation of ultraviolet light, the rainwater in the storage tank can be sterilized, thereby extending the shelf life of the rainwater.

[0009] Optionally, the water storage tank has a vertically formed receiving groove on its side wall, a filter basket filled with activated carbon placed in the receiving groove, a bottom cavity with a receiving plate closely attached to it arranged in the bottom cavity, the bottom end of the receiving groove connected to the bottom cavity, a bearing ring closely attached to its vertical side wall and a driving component for driving the bearing ring to rise and fall arranged in the water storage tank, a water-proof membrane arranged between the bearing ring and the inner bottom wall of the water storage tank, and a return water component arranged on the receiving plate for sending rainwater in the receiving groove back to the water storage tank; a height level gauge electrically connected to the control system is arranged in the water storage tank.

[0010] By adopting the above technical solution, when the water storage tank is filled with water, the level gauge can detect the liquid level in the tank, and thus gradually increase the height of the bearing ring through the drive component. When the motor drives the mounting bracket to rotate, the rainwater in the water storage tank forms a swirling flow, thus forming a funnel shape on the top surface of the rainwater. The rainwater at the highest point overflows from the bearing ring into the receiving tank. When it flows through the filter basket, the activated carbon performs secondary sterilization and adsorbs odors on the rainwater. Afterwards, the rainwater flows back into the water storage tank under the action of the return water component.

[0011] Optionally, the top of the receiving groove extends to the ground and a sealing plate is arranged at the opening, and a basket line is attached to the filter basket, with the top of the basket line attached near the top of the receiving groove.

[0012] By adopting the above technical solution, when workers perform regular landscape maintenance, they can open the sealing plate and use the lifting line to pull the filter basket out of the receiving tank to replace the ineffective activated carbon.

[0013] Optionally, the driving component includes a winding wheel rotatably sleeved on a rotating shaft, a gear coaxially arranged on the winding wheel, a friction ring arranged between the winding wheel and the rotating shaft, and multiple suspension wires wound on the winding wheel attached to the bearing ring. The top of the water storage tank is also equipped with an electric telescopic cylinder electrically connected to the control system, and the piston rod of the electric telescopic cylinder is engaged with the tooth groove of the gear.

[0014] By adopting the above technical solution, when it is necessary to raise the load-bearing ring, the control system keeps the piston rod of the electric telescopic cylinder in the retracted state. At this time, the motor drives the winding wheel to rotate through the shaft, and the winding wheel winds and unwinds the suspended wire. When it is necessary to maintain the height of the load-bearing ring, the piston rod of the electric telescopic cylinder extends and engages with the slot of the gear, thereby locking the winding wheel.

[0015] Optionally, the bottom end of the rotating shaft is connected to a receiving plate. The outer circumferential wall of the receiving plate is provided with a plurality of return water grooves extending to its top surface and communicating with the receiving tank. The return water assembly includes a pressure plate that slides vertically within each return water assembly. A pressure ring is arranged on the top of the receiving plate and pressed against the top surface of the pressure plate. A lifting groove is vertically opened on the side wall of the receiving plate opposite to the return water groove. A vertical guide rod is arranged in the lifting groove. The pressure plate is slidably sleeved on the guide rod. The pressure plate extends into the lifting groove and is supported by a first reset spring sleeved on the guide rod between the pressure plate and the bottom wall of the lifting groove. A one-way valve is arranged on each pressure plate. The return water assembly also includes a pressure part for pushing the pressure plate downward.

[0016] By adopting the above technical solution, the motor's output shaft drives the receiving plate to rotate within the bottom cavity via a rotating shaft. When the return water tank rotates to be connected with the receiving tank, rainwater in the receiving tank flows in and fills the return water tank. When the return water tank rotates to be misaligned with the receiving tank, the pressure unit applies downward pressure to multiple pressure plates simultaneously, and the rainwater in the return water tank can only flow back to the storage tank through a one-way valve, thus achieving water return. When the pressure unit releases the downward pressure on the pressure plates, the pressure plates return to their original position under the deformation force of the first reset spring.

[0017] Optionally, the water-pressing part includes a lifting sleeve that is slidably and rotatably sleeved on a rotating shaft. A limiting frame rod is arranged on the lifting sleeve that slides vertically with the bottom of the water storage tank. Multiple pressure arms are also arranged on the outer wall of the lifting sleeve, with each pressure arm corresponding to a water-pressing plate. A horizontal groove, a reset groove, and a spiral groove are opened on the inner wall of the lifting sleeve. The horizontal groove is opened circumferentially relative to the lifting sleeve. One end of the horizontal groove is connected to the bottom end of the spiral groove, and the other end is connected to the bottom end of the reset groove. The top ends of the spiral groove and the reset groove are connected. A protrusion is arranged on the outer wall of the rotating shaft that slides with the horizontal groove, the reset groove, and the spiral groove. A second reset spring supports the lifting sleeve and the receiving plate.

[0018] By adopting the above technical solution, the motor's output shaft drives the convex protrusion to rotate axially. As the protrusion rotates in the horizontal groove, the rainwater in the receiving groove is filled into the return water groove. When the protrusion rotates to the inner part, the protrusion's abutment against the side wall of the spiral groove causes the lifting sleeve to slide downwards while the shaft rotates, thereby driving the pressure arm to press down onto the corresponding pressure plate. During this process, the lifting sleeve compresses the second reset spring. When the protrusion moves to the connection between the spiral groove and the reset groove, the deformation force of the second reset spring pushes the lifting sleeve upwards to reset, and the protrusion slides towards the bottom of the reset groove and finally moves back into the horizontal groove.

[0019] Optionally, the bottom end of the pressure arm is hemispherical.

[0020] By adopting the above technical solution, the hemispherical shape reduces the contact area between the bottom of the pressure arm and the pressure plate, which helps to improve the smoothness of the pressure arm's movement relative to the pressure plate.

[0021] Optionally, the receiving tray is coated with polytetrafluoroethylene.

[0022] By adopting the above technical solution, polytetrafluoroethylene has a low coefficient of friction, which helps to improve the smoothness of the container's rotation in the bottom cavity.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The control system periodically starts the motor, and the output shaft of the motor drives the mounting bracket to rotate. Multiple ultraviolet germicidal lamps rotate accordingly. Under the irradiation of ultraviolet light, the rainwater in the storage tank can be sterilized, thereby extending the shelf life of the rainwater.

[0025] 2. When the water storage tank is filled with water, the height level gauge can detect the liquid level in the tank and gradually raise the height of the support ring via the drive component. When the motor drives the mounting bracket to rotate, the rainwater in the tank forms a swirling flow, creating a funnel shape at the top. The rainwater at the highest point overflows from the support ring into the receiving tank. As it flows through the filter basket, the activated carbon performs secondary sterilization and adsorbs odors on the rainwater. Afterward, the rainwater flows back into the water storage tank under the action of the return water component.

[0026] 3. The motor's output shaft drives the receiving plate to rotate within the bottom cavity via a rotating shaft. When the return water tank rotates to be connected with the receiving tank, rainwater flows into and fills the return water tank. When the return water tank rotates to be separated from the receiving tank, the pressure unit applies downward pressure to multiple pressure plates simultaneously, allowing rainwater in the return water tank to flow back to the storage tank only through a one-way valve, thus achieving water return. When the pressure unit releases the downward pressure on the pressure plates, the pressure plates return to their original position under the deformation force of the first reset spring.

[0027] 4. The motor's output shaft drives the convex protrusion to rotate axially. As the protrusion rotates in the horizontal groove, rainwater in the receiving groove is filled into the return water groove. When the protrusion rotates to the inner part, the protrusion's contact with the side wall of the spiral groove causes the lifting sleeve to slide downwards while the shaft rotates, thereby driving the pressure arm to press down onto the corresponding pressure plate. During this process, the lifting sleeve compresses the second reset spring. When the protrusion moves to the connection between the spiral groove and the reset groove, the deformation force of the second reset spring pushes the lifting sleeve upwards to reset, and the protrusion slides towards the bottom of the reset groove and finally moves back into the horizontal groove. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view showing the positional relationship between the ultraviolet germicidal lamp, the mounting bracket, and the height level gauge in the embodiments of this application.

[0029] Figure 2 This is a cross-sectional view showing the positional relationship between the limiting frame rod, the lifting sleeve, and the mounting plate in the embodiments of this application.

[0030] Figure 3 yes Figure 2 Enlarged view of section B.

[0031] Figure 4 yes Figure 1 Enlarged view of section A.

[0032] Figure 5 This is a cross-sectional view showing the positional relationship between the horizontal groove, the reset groove, and the spiral groove in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Water storage tank; 101. Receiving tank; 102. Bottom cavity; 2. Motor; 3. Rotating shaft; 4. Mounting frame; 5. Ultraviolet germicidal lamp; 6. Filter basket; 7. Activated carbon; 8. Receiving tray; 801. Return water tank; 802. Lifting tank; 9. Bearing ring; 10. Water-proof membrane; 11. Sealing plate; 12. Lifting basket line; 13. Winding reel; 14. Gear; 15. Friction ring; 16. Suspension line; 17. Electric telescopic cylinder; 18. Pressure plate; 19. Pressure ring; 20. Guide rod; 21. First reset spring; 22. One-way valve; 23. Lifting sleeve; 231. Horizontal groove; 232. Reset groove; 234. Spiral groove; 24. Limiting frame rod; 25. Pressure arm; 26. Second reset spring; 27. Height level gauge. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a water-saving irrigation system for sponge city construction parks and green spaces.

[0036] Reference Figure 1 The sponge city construction park green space landscape water-saving irrigation system includes a buried underground water storage tank 1, and a motor 2 electrically connected to the control system is bolted to the top wall of the water storage tank 1. The motor 2 adopts the existing technology of forward and reverse servo motor.

[0037] Reference Figure 1 and Figure 2 The output shaft of motor 2 is coaxially connected to a rotating shaft 3 via a bearing. A mounting bracket 4 is welded onto the rotating shaft 3, and multiple ultraviolet germicidal lamps 5, which are electrically connected to the control system, are bolted onto the mounting bracket 4.

[0038] The control system periodically starts motor 2, whose output shaft drives shaft 3 to rotate. Shaft 3, through mounting bracket 4, drives multiple sets of ultraviolet germicidal lamps 5 to rotate. The ultraviolet germicidal lamps 5 emit ultraviolet rays to irradiate rainwater, thereby sterilizing the rainwater and improving its quality.

[0039] Reference Figure 1 Two vertical receiving troughs 101 are opened on the side wall of the water storage tank 1, and the two receiving troughs 101 are symmetrically distributed about the vertical center line of the water storage tank 1. The top of the receiving trough 101 extends to the ground and is covered by a sealing plate 11. A filter basket 6 is placed in the receiving trough 101 and the filter basket 6 is filled with activated carbon 7.

[0040] A carrying line 12 is attached to the filter basket 6, with the top of the carrying line 12 attached near the top of the receiving tank 101. When workers perform regular landscape maintenance, they open the sealing plate 11 and use the carrying line 12 to lift the filter basket 6 out of the receiving tank 101. After replacing the activated carbon 7, the filter basket 6 is placed back into the receiving tank 101 and the sealing plate 11 is closed.

[0041] Reference Figure 1 and Figure 2 A circular cavity 102 is formed at the center of the bottom wall of the water storage tank 1. The bottom ends of the two receiving tanks 101 are connected to the cavity 102. A receiving plate 8 is placed in the cavity 102 and rotates with it. The receiving plate 8 is bolted to the bottom end of the rotating shaft 3. The receiving plate 8 is coated with polytetrafluoroethylene.

[0042] Reference Figure 1 The water storage tank 1 contains a support ring 9 and a drive component for raising and lowering the support ring 9. The support ring 9 is in close contact with the vertical inner wall of the water storage tank 1. A ring-shaped water-proof membrane 10 is bonded between the support ring 9 and the bottom wall of the water storage tank 1. A height level gauge 27, which is electrically connected to the control system, is also bolted to the bottom wall of the water storage tank 1 at a position relative to the water-proof membrane 10 and the mounting frame 4.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The driving component includes a winding wheel 13 rotatably mounted on a rotating shaft 3, a gear 14 coaxially connected to the winding wheel 13, and a friction ring 15 arranged between the winding wheel 13 and the rotating shaft 3.

[0044] Multiple suspension wires 16 are attached to the bearing ring 9, and the multiple suspension wires 16 are wound together on the winding wheel 13. An electric telescopic cylinder 17, which is electrically connected to the control system, is also bolted to the top of the water storage tank 1. The piston rod of the electric telescopic cylinder 17 is engaged with the tooth groove of the gear 14.

[0045] Reference Figure 1 , Figure 2 and Figure 3 When water enters the water storage tank 1, the height level gauge 27 detects the water level in real time and starts the motor 2 and electric telescopic cylinder 17 through the control system. The piston rod of the electric telescopic cylinder 17 retracts and disengages from the gear 14. Meanwhile, the rotating shaft 3 drives the winding wheel 13 to rotate through the friction ring 15, thereby retracting the hanging line 16. The bearing ring 9 rises accordingly, ensuring that the height of the bearing ring 9 is slightly higher than the water level in a calm state.

[0046] When the water tank 1 stops filling with water, the control system shuts off the motor 2 and the electric telescopic cylinder 17. The piston rod of the electric telescopic cylinder 17 extends and engages with the tooth groove of the gear 14, so that the bearing ring 9 maintains the corresponding height.

[0047] While the motor 2 drives the ultraviolet germicidal lamp 5 to rotate, the rainwater in the water storage tank 1 is subjected to force to form a swirling flow. The top surface of the rainwater forms a funnel shape. The rainwater near the support ring 9 overflows from the support ring 9 into the receiving tank 101, and then is sterilized and deodorized by the activated carbon 7 in the receiving tank 101.

[0048] Reference Figure 1 , Figure 2 and Figure 4 The receiving tray 8 is also equipped with a water return assembly for returning rainwater in the receiving trough 101 to the water storage tank 1. The water return assembly includes a water return section and a water pressurization section.

[0049] Two return water channels 801 extending to their top surface and communicating with the receiving tank 101 are provided on the outer circumferential wall of the receiving plate 8. The return water section includes a pressure plate 18 that slides vertically in the two return water channels 801 and a pressure ring 19 that is bolted to the top surface of the receiving plate 8 and pressed against the top surface of the pressure plate 18. The pressure ring 19 is used to prevent the pressure plate 18 from detaching from the top of the return water channel 801.

[0050] Reference Figure 1 , Figure 2 and Figure 4 The receiving tray 8 has a vertically opening lifting groove 802 on the side wall opposite to the return water tank 801. The bottom end of the lifting groove 802 is integrally formed with a vertical guide rod 20. The pressure plate 18 extends into the lifting groove 802 and is slidably sleeved on the guide rod 20. A first reset spring 21 sleeved on the guide rod 20 supports the pressure plate 18 and the bottom wall of the lifting groove 802. Each pressure plate 18 is also threaded with a one-way valve 22.

[0051] Reference Figure 1 , Figure 3 and Figure 4 The water-pressing part includes a lifting sleeve 23 that is slidably and rotatably sleeved on the rotating shaft 3. A limiting frame rod 24 that is bolted to the lifting sleeve 23 and vertically slides with the bottom of the water storage tank 1. Two pressure arms 25 are welded on the outer wall of the lifting sleeve 23, one pressure arm 25 corresponds to one water-pressing plate 18, and the bottom end of the pressure arm 25 is hemispherical.

[0052] Reference Figure 1 , Figure 3 and Figure 4 The inner wall of the lifting sleeve 23 has a horizontal groove 231, a reset groove 232 and a spiral groove 234. The horizontal groove 231 is C-shaped relative to the axis of the lifting sleeve 23. One end of the horizontal groove 231 is connected to the bottom end of the spiral groove 234 and the other end is connected to the bottom end of the reset groove 232. The top ends of the spiral groove 234 and the reset groove 232 are connected.

[0053] The reset groove 232 is not a straight vertical groove, but is similar to the spiral groove 234 in a spiral shape, but the spiral angle is smaller than that of the spiral groove 234 and the spiral directions of the two are opposite.

[0054] Reference Figure 1 , Figure 3 and Figure 4 The outer wall of the rotating shaft 3 is integrally formed with a protrusion (not shown in the figure) that slides with the horizontal groove 231, the reset groove 232 and the spiral groove 234. A second reset spring 26 supports the lifting sleeve 23 between it and the receiving plate 8.

[0055] Reference Figure 1 , Figure 3 and Figure 4 The rotating shaft 3 drives the receiving plate 8 to rotate. When the return water tank 801 is connected to the receiving tank 101, the rainwater in the receiving tank 101 fills the return water tank 801, and the protrusion is located in the horizontal tank 231.

[0056] When the return water tank 801 is completely misaligned with the receiving tank 101, the protrusion moves from the horizontal tank 231 to the spiral tank 234. The protrusion's contact with the side wall of the spiral tank 234 causes the lifting sleeve 23 to gradually descend and squeeze the second reset spring 26, thereby driving the pressure arm 25 to move downward and pushing the pressure plate 18 downward. The rainwater in the return water tank 801 can only flow back to the water storage tank 1 through the one-way valve 22.

[0057] Reference Figure 1 , Figure 3 and Figure 4 When the protrusion moves to the connection between the spiral groove 234 and the reset groove 232, the deformation force of the second reset spring 26 pushes the lifting sleeve 23 upward to achieve reset, and the protrusion moves from the bottom end of the reset groove 232 back into the horizontal groove 231.

[0058] When the return water tank 801 is connected to the receiving tank 101 again, the rainwater in the receiving tank 101 replenishes the return water tank 801 again, and the first reset spring 21 pushes the water pressure plate 18 upward to achieve reset.

[0059] The above process is repeated, powered by motor 2, and the return water assembly sends the rainwater that has been adsorbed and deodorized in the receiving tank 101 back to the water storage tank 1.

[0060] The implementation principle of a water-saving irrigation system for sponge city construction parks and green spaces, as described in this application, is as follows:

[0061] When water enters the water storage tank 1, the height level gauge 27 detects the water level in real time and starts the motor 2 and electric telescopic cylinder 17 through the control system. The piston rod of the electric telescopic cylinder 17 retracts and disengages from the gear 14. Meanwhile, the rotating shaft 3 drives the winding wheel 13 to rotate through the friction ring 15, thereby retracting the hanging line 16. The bearing ring 9 rises accordingly, ensuring that the height of the bearing ring 9 is slightly higher than the water level.

[0062] When the water tank 1 stops filling with water, the control system shuts off the motor 2 and the electric telescopic cylinder 17. The piston rod of the electric telescopic cylinder 17 extends and engages with the tooth groove of the gear 14.

[0063] The control system periodically starts motor 2, and the output shaft of motor 2 drives the rotating shaft 3 to rotate. The rotating shaft 3 drives multiple sets of ultraviolet germicidal lamps 5 to rotate through the mounting bracket 4. At the same time, the rainwater in the water storage tank 1 is forced to form a swirling flow, and the top surface of the rainwater forms a funnel shape. The rainwater near the bearing ring 9 overflows from the bearing ring 9 into the receiving tank 101, where it is then sterilized and deodorized by the activated carbon 7.

[0064] The rotating shaft 3 drives the receiving plate 8 to rotate. When the return water tank 801 is connected to the receiving tank 101, the rainwater in the receiving tank 101 fills the return water tank 801, and the protrusion is located in the horizontal tank 231.

[0065] When the return water tank 801 is completely misaligned with the receiving tank 101, the protrusion moves from the horizontal tank 231 to the spiral tank 234. The protrusion's contact with the side wall of the spiral tank 234 causes the lifting sleeve 23 to gradually descend and squeeze the second reset spring 26, thereby driving the pressure arm 25 to move downward and pushing the pressure plate 18 downward. The rainwater in the return water tank 801 can only flow back to the water storage tank 1 through the one-way valve 22.

[0066] When the protrusion moves to the point where the spiral groove 234 connects with the reset groove 232, the deformation force of the second reset spring 26 pushes the lifting sleeve 23 upward to achieve reset, and the protrusion moves back from the bottom end of the reset groove 232 into the horizontal groove 231. When the return water trough 801 connects with the receiving trough 101 again, the rainwater in the receiving trough 101 replenishes the return water trough 801 again, and the first reset spring 21 pushes the water pressure plate 18 upward to achieve reset.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water-saving irrigation system for sponge city construction parks and green spaces, comprising an underground water storage tank (1), characterized in that: The water storage tank (1) is equipped with a motor (2) that is electrically connected to the control system. The output shaft of the motor (2) is coaxially arranged with a rotating shaft (3). A mounting bracket (4) is arranged on the rotating shaft (3). Multiple sets of ultraviolet germicidal lamps (5) that are electrically connected to the control system are arranged on the mounting bracket (4). The water storage tank (1) has a vertically opening receiving groove (101) on its side wall. A filter basket (6) is placed in the receiving groove (101) and the filter basket (6) is filled with activated carbon (7). The bottom of the water storage tank (1) has a bottom cavity (102) and a receiving plate (8) is arranged in close contact with it in the bottom cavity (102). The bottom end of the receiving groove (101) is connected to the bottom cavity (102). A bearing ring (9) is arranged in close contact with its vertical side wall and a driving component for driving the bearing ring (9) to rise and fall. A water-proof membrane (10) is arranged between the bearing ring (9) and the inner bottom wall of the water storage tank (1). A water return component for sending rainwater in the receiving groove (101) back to the water storage tank (1) is arranged on the receiving plate (8). A height level gauge (27) electrically connected to the control system is arranged in the water storage tank (1). The driving component includes a winding wheel (13) rotatably sleeved on a rotating shaft (3), a gear (14) coaxially arranged on the winding wheel (13), a friction ring (15) arranged between the winding wheel (13) and the rotating shaft (3), and multiple suspension wires (16) wound on the winding wheel (13) attached to the bearing ring (9). An electric telescopic cylinder (17) electrically connected to the control system is also arranged on the top of the water storage tank (1). The piston rod of the electric telescopic cylinder (17) is engaged with the tooth groove of the gear (14). The bottom end of the rotating shaft (3) is connected to the receiving plate (8). The outer circumferential wall of the receiving plate (8) is provided with a plurality of return water grooves (801) extending to its top surface and communicating with the receiving tank (101). The return water assembly includes a pressure plate (18) that slides vertically in each return water assembly. The top of the receiving plate (8) is provided with a pressure ring (19) that presses against the top surface of the pressure plate (18). The side wall of the receiving plate (8) opposite to the return water groove (801) is provided with a vertical lifting groove. (802), a vertical guide rod (20) is arranged in the lifting groove (802), the pressure plate (18) is slidably sleeved on the guide rod (20), the pressure plate (18) extends into the lifting groove (802) and is supported by a first reset spring (21) sleeved on the guide rod (20) between it and the bottom wall of the lifting groove (802), each pressure plate (18) is provided with a one-way valve (22), and the return water assembly also includes a pressure part for pushing the pressure plate (18) to move downward; The water-pressing part includes a lifting sleeve (23) that slides and rotates on a rotating shaft (3). A limiting frame rod (24) is arranged on the lifting sleeve (23) and slides vertically with the bottom of the water storage tank (1). Multiple pressure arms (25) are also arranged on the outer wall of the lifting sleeve (23), with one pressure arm (25) corresponding to one water-pressing plate (18). A horizontal groove (231), a reset groove (232), and a spiral groove (234) are opened on the inner wall of the lifting sleeve (23). The horizontal groove (231) The horizontal groove (231) is circumferentially opened relative to the lifting sleeve (23). One end of the horizontal groove (231) is connected to the bottom end of the spiral groove (234), and the other end is connected to the bottom end of the reset groove (232). The top ends of the spiral groove (234) and the reset groove (232) are connected. The outer wall of the rotating shaft (3) is provided with protrusions that slide in cooperation with the horizontal groove (231), the reset groove (232) and the spiral groove (234). A second reset spring (26) is provided between the lifting sleeve (23) and the receiving plate (8).

2. The sponge city construction park green space landscape water-saving irrigation system according to claim 1, characterized in that: The top of the receiving trough (101) extends to the ground and a sealing plate (11) is arranged at the opening. A basket lifting line (12) is attached to the filter basket (6), and the top of the basket lifting line (12) is attached to a position close to the top of the receiving trough (101).

3. The sponge city construction park green space landscape water-saving irrigation system according to claim 1, characterized in that: The bottom end of the pressure arm (25) is hemispherical.

4. The sponge city construction park green space landscape water-saving irrigation system according to claim 1, characterized in that: The receiving tray (8) is coated with polytetrafluoroethylene.

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