Sponge campus rainwater collection device and use method

Abstract

This invention relates to the field of rainwater harvesting technology for sponge campuses, and discloses a rainwater harvesting device and its usage method for sponge campuses. The device includes a buried pipe, a connecting pipe, and a collection box connected in sequence. The top of the buried pipe has an arc-shaped, elastic, permeable shell that extends above the ground. Inside the shell is a pneumatic self-cleaning structure composed of a sliding groove, piston shaft, sliding plate, spring, and air holes. The bottom of the inner shell has a pressurized flushing component. The connecting pipe has a worm gear driven crushing component. The collection box is divided into an interception chamber and a sedimentation chamber by an inclined filter screen. This invention removes surface debris by pressing down the permeable shell, combined with pneumatic pipe unblocking, in-situ impurity crushing, and rainwater sedimentation and grading treatment, ensuring rainwater harvesting efficiency, reducing operation and maintenance difficulty and costs, realizing rainwater resource utilization, and meeting the needs of sponge campus construction. It solves the problems of existing flat-grid rainwater inlets in campuses being easily blocked by fallen leaves and other debris, large impurities causing pipe siltation, and high daily maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of rainwater harvesting technology for sponge campuses, and more particularly to a rainwater harvesting device and its usage method for sponge campuses. Background Technology

[0002] With the promotion of the concept of sponge city construction, sponge campuses have become an important direction for campus ecological transformation. By collecting rainwater from the campus ground, green spaces, and rooftops, it can be used for greening irrigation, road spraying, and landscape water replenishment, realizing the resource utilization of rainwater while reducing the risk of campus flooding.

[0003] Currently, most campus rainwater collection systems use flat grate-type rainwater inlets, which have the following drawbacks in practical use:

[0004] 1. During rainfall, fallen leaves, dead branches, paper scraps and other debris on the ground are easily carried by water flow and accumulate on the surface of the rainwater inlet, causing the rainwater inlet to be blocked, which prevents rainwater from infiltrating and collecting smoothly, seriously affecting drainage and collection efficiency.

[0005] 2. Large debris carried by rainwater can easily accumulate inside the pipes, causing blockages and making daily cleaning and maintenance difficult and costly. Summary of the Invention

[0006] To overcome the above shortcomings, the present invention provides a rainwater collection device and method for use in a sponge campus, which solves the problems of easy clogging of rainwater inlets, easy siltation of pipes, and high maintenance costs mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a rainwater collection device for a sponge campus, comprising a buried pipe, a connecting pipe connected to the buried pipe, and a collection box connected to the connecting pipe. A permeable shell is installed on the top of the buried pipe. The upper surface of the permeable shell has an arc-shaped convex structure and is set above the ground. The permeable shell is made of elastic material and can elastically deform and rebound after being pressed down. A sliding groove is formed inside the permeable shell, and several second air holes are arranged in a circular array at the top of the sliding groove. An inner protective shell is coaxially arranged below the permeable shell, and several support plates are fixed in a circular array on the outer periphery of the inner protective shell, thereby fixing the inner protective shell to the inner wall of the buried pipe. A piston shaft is vertically installed inside the inner protective shell, and the upper end of the piston shaft extends into the sliding groove and slides in cooperation with the sliding groove.

[0008] The top surface of the inner shell is provided with several third air holes. A second spring is installed in a circular array inside the inner shell. A sliding plate is installed at the top of the second spring, and the sliding plate is in a sealing sliding fit with the inner wall of the inner shell. A first spring is installed inside the sliding groove, and the lower end of the first spring abuts against the top of the piston shaft. A several first air holes are opened in a circular array on the bottom side of the inner shell.

[0009] The bottom of the inner casing is equipped with a flushing device for unblocking pipes;

[0010] The connecting pipe is equipped with a crushing component for breaking down impurities.

[0011] Furthermore, the upper surface of the sliding plate is provided with a sealing post that matches the third air hole. When the sliding plate moves to the top, the sealing post is inserted into the third air hole to form a seal, preventing rainwater from entering the inner shell through the third air hole.

[0012] Furthermore, the flushing component includes a protective shell fixedly installed at the bottom of the inner protective shell. An air pump and a drive cylinder are installed inside the protective shell, and the output end of the drive cylinder is connected to a connecting plate. A limiting groove is provided on the inner wall of the connecting pipe, and the two sides of the connecting plate slide in conjunction with the limiting groove. A shielding plate for protecting the limiting groove is provided on both sides of the connecting plate. A stamping cylinder is installed at the bottom of the connecting plate and extends into the interior of the connecting pipe. The air pump provides a power source for the drive cylinder, driving the connecting plate to move up and down along the limiting groove, and driving the stamping cylinder to reciprocate inside the connecting pipe to increase the air pressure inside the pipe and clear the pipe.

[0013] Furthermore, a motor is mounted on the outer surface of the connecting pipe, and a crushing component is connected to the output end of the motor; the crushing component includes a protective shell mounted inside the connecting pipe by a fixing rod, a worm gear is provided inside the protective shell, and the worm gear is drivenly connected to the output shaft of the motor; a worm wheel is meshed on the surface of the worm gear, and crushing blades are mounted on the bottom of the worm wheel; the top of the protective shell is hemispherical, which facilitates impurities to slide off along the spherical surface.

[0014] Furthermore, a filter screen is installed inside the collection box, which divides the inside of the collection box into an upper interception chamber and a lower sedimentation chamber; the filter screen is inclined, and a closing door is provided on its lower side, which is installed on the side wall of the collection box for cleaning the impurities intercepted on the filter screen.

[0015] Furthermore, a suction pipe is provided in the upper clear water zone of the sedimentation chamber; a pump body is installed at the bottom of the collection box, and a drain pipe is connected to the output end of the pump body; the bottom of the collection box is recessed towards the pump body to facilitate the collection and discharge of sludge.

[0016] Furthermore, the piston shaft is a hollow structure or a solid column, with a gap between its upper end and the inner wall of the groove to form a gas flow channel.

[0017] Furthermore, the stamping cylinder is a cylindrical structure with an open bottom, and there is a gap between its outer wall and the inner wall of the connecting pipe; when the stamping cylinder moves downward, it compresses the air in the connecting pipe, forming a downward airflow to push impurities and rainwater downward.

[0018] Furthermore, the cutting edge of the crushing blade is serrated, used to cut and crush debris that enters the connecting pipe.

[0019] A method for using a rainwater harvesting device for a sponge campus includes the following steps:

[0020] S1. The underground pipe is buried underground, and the permeable shell is set above the ground with its outer circumference flush with the ground. The upper surface of the permeable shell has an arc-shaped structure. When it rains, rainwater flows into the underground pipe through the permeable shell and then into the collection box for storage through the connecting pipe. The arc-shaped permeable shell that is higher than the ground can reduce the probability of ground impurities completely blocking the water inlet and ensure that rainwater continues to infiltrate.

[0021] S2. When impurities accumulate on the surface of the permeable shell, causing rainwater infiltration to be obstructed, the permeable shell is pressed down to deform downwards, causing the sliding groove to slide downwards along the piston axis. The sliding groove pushes the sliding plate downwards inside the inner shell and compresses the second spring. After the permeable shell is released, the sliding plate rebounds upwards and resets under the rebound action of the second spring and the first spring in the sliding groove. During the upward movement of the sliding plate, the gas between the sliding plate and the third air hole is blown towards the surface of the permeable shell through the third air hole, blowing off surface impurities or causing residual water to flow to displace the blocked impurities and restore the rainwater infiltration channel. Outside air is replenished into the air cavity of the inner shell through the first air hole on the bottom side of the inner shell.

[0022] During operation, the sliding disc and the inner wall of the inner shell are sealed and sliding together to ensure the air tightness of the air chamber, prevent rainwater from seeping into the inner shell, and maintain the stable operation of the blowing and cleaning function; the inner shell is stably fixed to the inner wall of the buried pipe by the outer support plate to ensure the positional stability of the internal transmission structure.

[0023] S3. Activate the flushing device at the bottom of the inner casing to pressurize the inside of the connecting pipe, increase the air pressure inside the connecting pipe, and push the rainwater and impurities inside the pipe downward to keep the inside of the pipe unobstructed.

[0024] S4. Activate the internal crushing components of the connecting pipe to crush large impurities that enter the connecting pipe with rainwater, so as to prevent large impurities from accumulating and causing pipe blockage.

[0025] S5. The rainwater that has been crushed enters the collection box for storage and will be reused later.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. In this invention, an arc-shaped elastic permeable shell that is raised above the ground, combined with a pneumatic debris removal structure consisting of a chute, piston shaft, sliding plate, spring, and air hole, can generate airflow simply by pressing down on the permeable shell to blow away debris accumulated on the surface of the permeable shell, thus solving the problem of easy clogging of rainwater inlets; the arc-shaped design raised above the ground can reduce the situation where debris completely covers and blocks the permeable shell, and continuously ensure the efficiency of rainwater infiltration and collection.

[0028] 2. In this invention, by setting up a flushing component, an air pump drives a punching cylinder to reciprocate within the connecting pipe, pressurizing and ventilating the inside of the pipe, pushing the accumulated debris and rainwater downwards, thus clearing the pipe without the need for manual excavation and cleaning, reducing the maintenance difficulty and cost of pipe blockage.

[0029] 3. In this invention, by setting a crushing component inside the connecting pipe and driving the worm gear transmission by the motor to rotate the crushing blades, large debris such as fallen leaves and dead branches that enter the pipe with rainwater can be crushed in situ, avoiding the accumulation of large debris that causes pipe blockage and ensuring smooth rainwater transport.

[0030] 4. In this invention, the inside of the collection box is divided into an interception chamber and a sedimentation chamber by a filter screen, which can filter, settle and classify the collected rainwater. The upper layer of clear water can be directly pumped out through the water suction pipe for greening irrigation and road spraying, while the bottom sludge can be pumped out by the pump body, realizing the initial purification and resource utilization of rainwater, which is in line with the concept of sponge campus construction. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the bottom structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the external structure of the buried pipe in this invention;

[0034] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0035] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0036] Figure 6 This is a frontal cross-sectional view of the buried pipe in this invention.

[0037] Figure 7 for Figure 6 A magnified structural diagram at point B in the middle.

[0038] In the diagram: 1. Buried pipe; 101. Permeable shell; 102. Inner protective shell; 103. Third vent; 104. Slide groove; 105. Spring 1; 106. Piston shaft; 107. Slide plate; 108. Spring 2; 109. First vent; 1010. Second vent; 1011. Support plate; 2. Connecting pipe; 201. Motor; 202. Protective shell; 203. Worm; 204. Worm wheel; 205. Crushing blade; 3. Collection box; 301. Closing door; 302. Filter screen; 303. Suction pipe; 304. Drain pipe; 305. Pump body; 306. Interception chamber; 307. Sedimentation chamber; 4. Protective shell; 401. Air pump; 402. Restriction groove; 403. Connecting plate; 404. Baffle plate; 405. Stamping cylinder. Detailed Implementation

[0039] Example 1

[0040] Reference Figure 1-7 This embodiment provides a rainwater collection device for a sponge campus, including an underground pipe 1, a connecting pipe 2 sealed to the lower end of the underground pipe 1, and a collection box 3 connected to the lower end of the connecting pipe 2. The underground pipe 1, the connecting pipe 2 and the collection box 3 are connected in sequence to form a complete rainwater collection and transportation channel.

[0041] like Figure 3 As shown, a permeable shell 101 is installed on the top of the buried pipe 1. The upper surface of the permeable shell 101 has an arc-shaped raised structure and is set above the ground. The permeable shell 101 is made of aging-resistant elastic rubber material, which has good elastic deformation ability and can rebound and reset itself after being pressed down. The arc-shaped structure above the ground makes it difficult for fallen leaves and debris to completely cover and block the surface of the permeable shell 101. Even if some areas are covered, there are still gaps for rainwater to infiltrate, ensuring rainwater collection efficiency.

[0042] like Figure 4 , Figure 6 and Figure 7As shown, a cylindrical groove 104 is formed inside the bottom of the permeable shell 101. Several second air holes 1010 are arranged in a circular array at the top of the groove 104 to balance the air pressure inside the groove 104. An inner protective shell 102 is coaxially arranged below the permeable shell 101. Three to six support plates 1011 are fixed in a circular array around the outer periphery of the inner protective shell 102. The outer ends of the support plates 1011 are fixedly connected to the inner wall of the buried pipe 1. The support plates 1011 stably fix the inner protective shell 102 to the center position inside the buried pipe 1, while the gaps between adjacent support plates 1011 allow rainwater to flow smoothly. A piston shaft 106 is vertically installed at the center of the inner protective shell 102. The upper end of the piston shaft 106 extends into the slide groove 104 and slides in cooperation with the slide groove 104. The piston shaft 106 provides precise guidance for the up and down sliding of the slide groove 104. In this embodiment, the piston shaft 106 is a solid column, and there is an annular gap between its upper end and the inner wall of the slide groove 104 to form a gas flow channel. The top surface of the inner shell 102 is provided with a number of third air holes 103. The inner shell 102 is equipped with a spring 108 in a circular array inside. The top of the spring 108 is fixedly installed with a sliding plate 107. The edge of the sliding plate 107 is fitted with a sealing ring, which slides in a sealed manner with the inner wall of the inner shell 102, so that the sliding plate 107 and the interior of the inner shell 102 form a sealed air cavity structure.

[0043] like Figure 4 , Figure 6 and Figure 7 As shown, a spring 105 is installed on the inner top of the slide groove 104. The lower end of the spring 105 abuts against the top of the piston shaft 106. The spring 105 is used for the rebound and reset of the water-permeable shell 101 after being stepped on. Several first air holes 109 are arranged in a circular array on the bottom side of the inner protective shell 102. The first air holes 109 are used to replenish the air cavity with outside air and balance the air pressure when the slide plate 107 moves upward and resets. The upper surface of the slide plate 107 is provided with sealing posts corresponding to the third air holes 103. The sealing posts are made of rubber. When the slide plate 107 moves upward to the top position, the sealing posts are inserted into the third air holes 103 to form a seal, preventing rainwater from flowing back into the inner protective shell 102 through the third air holes 103, ensuring that the air cavity is dry and extending the service life of the device.

[0044] like Figure 4 and Figure 6As shown, a flushing component for unblocking pipes is installed at the bottom of the inner casing 102. The flushing component includes a protective shell 4 fixedly installed at the bottom of the inner casing 102. An air pump 401 and a drive cylinder are fixedly installed inside the protective shell 4. A connecting plate 403 is fixedly connected to the output end of the drive cylinder. A limiting groove 402 is symmetrically opened on the inner wall of the connecting pipe 2. The two sides of the connecting plate 403 are slidably installed inside the limiting groove 402. A baffle plate 404 is also fixedly installed on both sides of the connecting plate 403. The baffle plate 404 fits against the opening of the limiting groove 402 and can move synchronously with the connecting plate 403, always blocking the opening of the limiting groove 402 to prevent impurities in rainwater from entering the groove and affecting the pipe. Smooth sliding; A stamping cylinder 405 is fixedly installed at the bottom center of the connecting plate 403, and the stamping cylinder 405 extends vertically into the interior of the connecting pipe 2; the stamping cylinder 405 is a cylindrical structure with an open bottom, and an annular gap is left between its outer wall and the inner wall of the connecting pipe 2 to allow rainwater and impurities to flow normally; the air pump 401 provides a power source for the drive cylinder, drives the connecting plate 403 to move up and down along the limiting groove 402, and drives the stamping cylinder 405 to reciprocate synchronously in the connecting pipe 2; when the stamping cylinder 405 moves downward, it compresses the air in the connecting pipe 2, forming a downward high-pressure airflow, which pushes the impurities and rainwater accumulated in the pipe downward, realizes pipe dredging, and effectively avoids pipe sludge and blockage.

[0045] like Figure 1 , Figure 4 and Figure 5 As shown, the connecting pipe 2 is equipped with a crushing component for crushing impurities; a motor 201 is fixedly installed on the outer surface of the connecting pipe 2, and the output end of the motor 201 extends into the connecting pipe 2 and is connected to the crushing component for transmission; the crushing component includes a protective shell 202 installed in the center of the connecting pipe 2 by a fixing rod, and a worm gear 203 is installed inside the protective shell 202. The upper end of the worm gear 203 is connected to the output shaft of the motor 201 through a coupling; a worm wheel 204 is meshed on the surface of the worm gear 203, and a crushing blade 205 is fixedly installed on the bottom output shaft of the worm wheel 204. The cutting edge of the crushing blade 205 is serrated, which can efficiently cut and crush large debris such as fallen leaves, dead branches, and plastic fragments that enter the connecting pipe 2; the top of the protective shell 202 is a hemispherical flow guiding structure, which can guide the falling rainwater and impurities, so that the impurities slide along the spherical surface to the surrounding crushing area, and avoid the accumulation of impurities on the top of the protective shell 202.

[0046] like Figure 1 , Figure 2 and Figure 4As shown, a filter screen 302 is fixedly installed at the upper part of the inside of the collection box 3. The filter screen 302 is inclined at an angle of 10° to 15°. The filter screen 302 divides the inside of the collection box 3 into an upper interception chamber 306 and a lower sedimentation chamber 307. The filter screen 302 can intercept fine debris carried by rainwater, allowing the mud-water mixture to pass through the filter screen 302 and enter the lower sedimentation chamber 307 for settling. A closing door 301 is provided on the lower side of the filter screen 302, and the closing door 301 is sealed and installed on the side wall of the collection box 3. Opening the closing door 301 can clean the impurities intercepted and accumulated on the filter screen 302. Easy daily maintenance; the upper clear water area of ​​the sedimentation chamber 307 is equipped with a suction pipe 303, the outer end of which is sealed and extends to the outside of the collection box 3, which can be connected to an extraction device to extract the upper clear water for use in campus greening irrigation, road spraying, landscape water replenishment and other scenarios; a pump body 305 is fixedly installed at the bottom of the collection box 3, and a drain pipe 304 is fixedly connected to the output end of the pump body 305; the bottom of the collection box 3 is recessed towards the pump body 305 to form a conical mud collection structure, which facilitates the collection of sludge to the inlet of the pump body 305, and the sludge deposited at the bottom is concentrated and extracted by the pump body 305 and the drain pipe 304 to complete the sludge removal and maintenance.

[0047] Example 2

[0048] This embodiment provides a method for using the sponge campus rainwater collection device in Embodiment 1, specifically including the following steps:

[0049] S1. Initial Rainwater Collection: The underground pipe 1 is buried in the ground along the side of the campus road and around the green space. The installation position is adjusted so that the permeable shell 101 is set above the ground and the outer circumference of the permeable shell 101 is flush with the ground. The upper surface of the permeable shell 101 has an arc-shaped convex structure. When it rains, the rainwater accumulated on the ground seeps down along the surface of the arc-shaped permeable shell 101 and flows into the underground pipe 1. Then it is transported through the connecting pipe 2 and collected in the collection box 3 for storage. The arc-shaped convex permeable shell 101, which is higher than the ground, can raise the height of the water inlet, so that fallen leaves, mud and other debris on the ground are not easy to completely cover and block the water inlet. Even if some areas are blocked by debris, there are still gaps around the perimeter for rainwater to continue to seep down, ensuring rainwater collection efficiency.

[0050] S2. Clearing impurities from the surface of the permeable shell: When fallen leaves, debris, and other impurities accumulate on the surface of the permeable shell 101, causing a decrease in the rainwater infiltration rate and a tendency to become blocked, press down on the permeable shell 101. The elastic material of the permeable shell 101 deforms downward under the force, causing the bottom groove 104 to slide downward along the piston shaft 106. During the downward movement of the groove 104, it pushes the sliding plate 107 downward along the inner wall of the inner shell 102, simultaneously compressing the second spring 108 to store elastic potential energy. After releasing the permeable shell 101, the second spring 108 rebounds and pushes the sliding plate 107 upward. At the same time, the first spring 105 in the groove 104 rebounds and causes the permeable shell 101 to return to its original position. During the rapid upward movement of the sliding plate 107, the volume of the air cavity between the sliding plate 107 and the top surface of the inner shell 102 increases rapidly. The air inside the permeable shell 101 is compressed, forming an airflow that is ejected upwards through the third vent 103. This airflow blows away accumulated debris on the surface or causes residual water on the surface to flow, displacing the blocked debris and quickly restoring the rainwater infiltration channel of the permeable shell 101. The second vent 1010 at the top of the chute 104 can simultaneously balance the internal air pressure of the chute 104, ensuring smooth sliding. During the continuous upward repositioning of the sliding plate 107, the volume of the cavity below the sliding plate 107 in the inner shell 102 increases, creating a negative pressure. Outside air enters the air cavity of the inner shell 102 through the first vent 109 on the bottom side of the inner shell 102, balancing the internal air pressure and preparing for the next unblocking operation. Multiple airflow unblocking can be achieved by repeatedly pressing and releasing the permeable shell 101, ensuring water permeability.

[0051] During operation, the sliding plate 107 and the inner wall of the inner shell 102 maintain a sealed sliding fit. The sealing post on the top surface of the sliding plate 107 can be inserted into the third air hole 103 to form a seal when reset, ensuring the airtightness of the air chamber and ensuring sufficient air pressure for blowing and cleaning, thus improving the cleaning effect. At the same time, it can prevent rainwater from seeping into the interior of the inner shell 102, prevent components such as the spring and piston shaft 106 from being immersed in water and corroding for a long time, and maintain the long-term stable operation of the blowing and cleaning function. The inner shell 102 is stably fixed to the inner wall of the buried pipe 1 by the support plates 1011 arranged in a circumferential array on the outer periphery, ensuring the positional stability of the internal piston shaft 106, sliding plate 107 and other transmission structures, and ensuring smooth sliding and reliable transmission of the slide groove 104 during the pressing and cleaning process.

[0052] S3. Connecting Pipe Pressurization and Unblocking: When mud, sand, and debris accumulate inside the connecting pipe 2, causing poor drainage, the air pump 401 inside the protective shell 4 is activated. The air pump 401 provides power to the drive cylinder, driving the connecting plate 403 to move up and down along the limiting groove 402 on the inner wall of the connecting pipe 2. Simultaneously, the stamping cylinder 405 at the bottom of the connecting plate 403 moves back and forth inside the connecting pipe 2. When the stamping cylinder 405 moves downward, it quickly compresses the air inside the connecting pipe 2, increasing the air pressure inside the pipe and forming a downward high-pressure airflow. This pushes the accumulated rainwater and debris in the pipe downward simultaneously, achieving pneumatic unblocking of the pipeline. No manual excavation or cleaning is required, effectively reducing the maintenance difficulty and operating costs of pipeline blockage. The baffle plates 404 on both sides of the connecting plate 403 move up and down synchronously with the connecting plate, always blocking the opening of the limiting groove 402, preventing mud, sand, and debris in the rainwater from entering the limiting groove 402 and causing blockage, ensuring the long-term stable operation of the flushing components.

[0053] S4. Impurity Crushing in Pipeline: During the rainwater collection process, the motor 201 on the outside of the connecting pipe 2 is started simultaneously. The motor 201 outputs power to drive the worm 203 inside the protective shell 202 to rotate. Through the meshing transmission between the worm 203 and the worm wheel 204, the power is reversed and drives the crushing blades 205 at the bottom of the worm wheel 204 to rotate at high speed. When large impurities such as fallen leaves, dead branches, and plastic fragments fall into the crushing area with the rainwater entering the connecting pipe 2, they are cut and crushed into fine particles by the high-speed rotating sawtooth crushing blades 205. This prevents large impurities from accumulating in the pipe corners or collection box 3 and causing blockages, ensuring smooth rainwater delivery. The hemispherical guide structure at the top of the protective shell 202 can guide the falling rainwater and impurities, allowing the impurities to slide along the spherical surface to the surrounding crushing area, preventing impurities from accumulating at the top of the protective shell 202 and improving the impurity crushing efficiency.

[0054] S5. Rainwater Storage and Reuse: The crushed rainwater flows along the connecting pipe 2 into the interception chamber 306 of the collection box 3. The inclined filter screen 302 intercepts fine debris in the rainwater. The mud-water mixture passes through the filter screen 302 and enters the sedimentation chamber 307 below for settling. The clear water after sedimentation can be extracted through the suction pipe 303 for use in campus greening irrigation, road spraying, landscape water replenishment, and other scenarios. The silt deposited at the bottom of the collection box 3 can be collected at the pump body 305 and extracted through the drain pipe 304 to complete the silt removal. The impurities intercepted on the filter screen 302 can be cleaned periodically through the closed door 301 on the side wall, ultimately realizing the resource utilization of rainwater, which is in line with the construction concept of sponge campus.

Claims

1. A rainwater collection device for a sponge campus, comprising an underground pipe (1), a connecting pipe (2) connected to the underground pipe (1), and a collection box (3) communicating with the connecting pipe (2), characterized in that, The top of the buried pipe (1) is equipped with a permeable shell (101). The upper surface of the permeable shell (101) has an arc-shaped convex structure and is set above the ground. The permeable shell (101) is made of elastic material and can be elastically deformed and rebounded after being pressed down. The permeable shell (101) has a sliding groove (104) inside. The top of the sliding groove (104) has a number of second air holes (1010) arranged in a circular array. The permeable shell (101) is coaxially arranged with an inner protective shell (102) below. The outer circumference of the inner protective shell (102) is fixed with a number of support plates (1011). The inner protective shell (102) is fixed to the inner wall of the buried pipe (1) by the support plates (1011). The inner protective shell (102) is vertically installed with a piston shaft (106) inside the inner protective shell (102). The upper end of the piston shaft (106) extends into the sliding groove (104) and slides in cooperation with the sliding groove (104). The top surface of the inner shell (102) is provided with a plurality of third air holes (103). A second spring (108) is installed in the inner circumferential array of the inner shell (102). A sliding plate (107) is installed at the top of the second spring (108). The sliding plate (107) is in a sealed sliding fit with the inner wall of the inner shell (102). A first spring (105) is installed inside the sliding groove (104). The lower end of the first spring (105) abuts against the top of the piston shaft (106). A plurality of first air holes (109) are opened in the circumferential array on the bottom side of the inner shell (102). The bottom of the inner casing (102) is equipped with a flushing device for unblocking pipes; The connecting pipe (2) is equipped with a crushing component for crushing impurities.

2. The rainwater harvesting device for a sponge campus according to claim 1, characterized in that, The upper surface of the slide (107) is provided with a sealing post that matches the third air hole (103). The sealing post is inserted into the third air hole (103) to form a seal when the slide (107) moves to the top, preventing rainwater from entering the inner shell (102) through the third air hole (103).

3. The rainwater harvesting device for a sponge campus according to claim 1, characterized in that, The flushing component includes a protective shell (4) fixedly installed at the bottom of the inner shell (102). An air pump (401) and a drive cylinder are installed inside the protective shell (4). The output end of the drive cylinder is connected to a connecting plate (403). A limiting groove (402) is provided on the inner wall of the connecting pipe (2). The two sides of the connecting plate (403) slide in cooperation with the limiting groove (402). A shielding plate (404) for protecting the limiting groove (402) is provided on both sides of the connecting plate (403). A stamping cylinder (405) is installed at the bottom of the connecting plate (403). The stamping cylinder (405) extends into the interior of the connecting pipe (2). The air pump (401) provides a power source for the drive cylinder, drives the connecting plate (403) to move up and down along the limiting groove (402), and drives the stamping cylinder (405) to reciprocate in the connecting pipe (2) to increase the air pressure in the pipe and clear the pipe.

4. A rainwater harvesting device for a sponge campus according to claim 1, characterized in that, A motor (201) is installed on the outer surface of the connecting pipe (2), and a crushing component is connected to the output end of the motor (201). The crushing component includes a protective shell (202) installed inside the connecting pipe (2) by a fixing rod. A worm gear (203) is provided inside the protective shell (202), and the worm gear (203) is connected to the output shaft of the motor (201) for transmission. A worm wheel (204) is meshed on the surface of the worm gear (203), and a crushing blade (205) is installed at the bottom of the worm wheel (204). The top of the protective shell (202) is hemispherical, which facilitates the sliding of impurities along the spherical surface.

5. A rainwater harvesting device for a sponge campus according to claim 1, characterized in that, The collection box (3) is equipped with a filter screen (302) inside. The filter screen (302) divides the inside of the collection box (3) into an upper interception chamber (306) and a lower sedimentation chamber (307). The filter screen (302) is inclined and has a closing door (301) on its lower side. The closing door (301) is installed on the side wall of the collection box (3) and is used to clean the impurities intercepted on the filter screen (302).

6. A rainwater harvesting device for a sponge campus according to claim 5, characterized in that, The upper clear water zone of the sedimentation chamber (307) is equipped with a suction pipe (303); a pump body (305) is installed at the bottom of the collection box (3), and the output end of the pump body (305) is connected to a drain pipe (304); the bottom of the collection box (3) is recessed towards the pump body (305) to facilitate the collection and discharge of sludge.

7. A rainwater harvesting device for a sponge campus according to claim 1, characterized in that, The piston shaft (106) is a hollow structure or a solid column, with a gap between its upper end and the inner wall of the slide groove (104) to form a gas flow channel.

8. A rainwater harvesting device for a sponge campus according to claim 3, characterized in that, The stamping cylinder (405) is a cylindrical structure with an open bottom, and there is a gap between its outer wall and the inner wall of the connecting pipe (2). When the stamping cylinder (405) moves downward, it compresses the air in the connecting pipe (2) to form a downward airflow to push impurities and rainwater downward.

9. A rainwater harvesting device for a sponge campus according to claim 4, characterized in that, The cutting edge of the crushing blade (205) is serrated, used to cut and crush debris that enters the connecting pipe (2).

10. A method of using a rainwater harvesting device for a sponge campus, comprising the rainwater harvesting device for a sponge campus as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. The underground pipe (1) is buried underground, and the permeable shell (101) is set above the ground and its outer circumference is flush with the ground. The upper surface of the permeable shell (101) has an arc-shaped structure. When it rains, the rainwater flows into the underground pipe (1) through the permeable shell (101) and then flows into the collection box (3) through the connecting pipe (2) for storage. The arc-shaped permeable shell (101) above the ground can reduce the probability of ground impurities completely blocking the water inlet and ensure that rainwater continues to infiltrate. S2. When impurities accumulate on the surface of the permeable shell (101), causing poor rainwater infiltration, the permeable shell (101) is pressed down to deform it downwards, causing the slide groove (104) to slide downwards along the piston shaft (106). The slide groove (104) pushes the slide plate (107) downwards inside the inner shell (102) and compresses the second spring (108). After the permeable shell (101) is released, the slide plate (107) moves downwards between the second spring (108) and the slide groove (104) and the first spring. Under the rebound action of (105), the slide plate (107) bounces upward and resets. During the upward movement of the slide plate (107), the gas between the slide plate (107) and the third air hole (103) is blown towards the surface of the permeable shell (101) through the third air hole (103), blowing off surface impurities or driving the flow of residual water to promote the displacement of blocked impurities and restore the rainwater infiltration channel; outside air is replenished into the air cavity of the inner shell (102) through the first air hole (109) on the bottom side of the inner shell (102); During operation, the sliding plate (107) and the inner wall of the inner shell (102) are sealed and sliding together to ensure the air tightness of the air chamber, prevent rainwater from seeping into the inner shell (102), and maintain the stable operation of the blowing and cleaning function; the inner shell (102) is stably fixed to the inner wall of the buried pipe (1) by the outer peripheral support plate (1011) to ensure the positional stability of the internal transmission structure; S3. Activate the flushing device at the bottom of the inner casing (102) to pressurize the inside of the connecting pipe (2), increase the air pressure inside the connecting pipe (2), push the rainwater and impurities in the pipe downward, and keep the inside of the pipe unobstructed. S4. Start the crushing parts inside the connecting pipe (2) to crush the large impurities that enter the connecting pipe (2) with the rainwater, so as to avoid the accumulation of large impurities and blockage of the pipe. S5. The rainwater that has been crushed is stored inside the collection box (3) after flowing into the water flow, and will be reused later.

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