A frustum compound horizontal subsurface flow constructed wetland system

Abstract

The application discloses a circular-truss composite horizontal subsurface flow constructed wetland system and relates to the field of ecological engineering. The circular-truss composite horizontal subsurface flow constructed wetland system comprises a stepped wetland pool and a anti-blocking assembly. The stepped wetland pool comprises arc-shaped wetland units, water control components and a pipe network unit penetrating through each arc-shaped wetland unit. The anti-blocking assembly comprises a trigger component and a dredging component fixedly connected with the pipe network unit. The circular-truss composite horizontal subsurface flow constructed wetland system is applied to the landscape water treatment of a certain city riverside green land, purifies river water and introduces the purified river water into the site for waterscape use, so as to save water resources, optimize the site microclimate and enrich the site habitat. The site spatial form has its own characteristics, mainly taking a circular theme and having rich height differences. In combination with the spatial design scheme, the circular-truss composite horizontal subsurface flow constructed wetland with convex or concave circular ring steps is created, land is saved, the subdivided space is prolonged, the processing flow line is lengthened, the purification efficiency is enhanced, the ornamental property of the artificial wetland is beautified, and the pipeline output smoothness is improved through the anti-blocking assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ecological engineering, and in particular to a circular truncated cone type composite horizontal subsurface flow constructed wetland system. BACKGROUND

[0002] As an important part of blue-green infrastructure, the application scenarios of constructed wetlands are increasingly diverse. It can provide multiple ecosystem services, such as water quality purification, treatment and regeneration of micro-polluted water bodies, regulation of rainwater and flood, ecological restoration, landscape recreation, etc. Compared with other ecological restoration measures, constructed wetlands have relatively low cost and are one of the key measures to prevent and control non-point source pollution, improve urban river water quality, and optimize urban wetland parks.

[0003] Subsurface flow constructed wetlands can be divided into three types according to the direction of water flow, namely horizontal subsurface flow wetlands, vertical subsurface flow wetlands, and composite subsurface flow wetlands. Horizontal flow wetlands are widely used due to their relatively easy implementation and high purification efficiency. Currently, horizontal subsurface flow constructed wetlands are generally composed of hard pool bodies, which have strict requirements for regularity of shape. This ensures the purification efficiency to some extent but limits the observability of constructed wetlands and their compatibility with base design language. In more and more public spaces, the use of subsurface flow constructed wetlands not only saves water and land resources but also ensures the safety and health of citizens' water activities. The demand for the shape of constructed wetlands is also increasingly diverse, but due to the single shape of existing forms, it is often difficult to meet the functional requirements of multiple parties.

[0004] To address this problem, some researchers have explored another direction, such as patent publication number CN 105198092 A, which focuses on the application of vertical flow constructed wetlands with inclined pool bottoms suitable for slope terrain, and patent publication number CN 105198085 A, which uses piles and boards to set up plant planting areas and construct multi-level stepped horizontal subsurface flow constructed wetland revetments. They have solved the problem of constructing stepped subsurface flow wetlands on slopes to some extent, but there is still a lack of consideration for the flexibility of their spatial form. The water quantity control method between different parallel wetlands still needs to be further optimized, and a smooth system needs to be designed to ensure the efficient operation of constructed wetlands with corresponding spatial forms. Therefore, a circular truncated cone type composite horizontal subsurface flow constructed wetland system is needed. SUMMARY

[0005] In view of the problems existing in the above-mentioned frustum-shaped composite horizontal subsurface flow constructed wetland system, this invention is proposed.

[0006] Therefore, the problem to be solved by this invention is how to improve the flexibility of spatial form and prevent pipe blockage.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a frustum-shaped composite horizontal subsurface flow constructed wetland system, comprising a stepped wetland pool, including arc-shaped wetland units, water control components, and a pipe network unit connecting each of the arc-shaped wetland units. The arc-shaped wetland units are connected in series and arranged in a stepped layout, with each arc-shaped wetland unit surrounding the water control components. The number of sets of arc-shaped wetland units is not less than one set. The stepped wetland pool adopts a reasonable radius and number of steps according to the site dimensions. The stepped wetland pools are connected in parallel to form the constructed wetland system. Maintenance passages are provided between each stepped wetland pool. The constructed wetland system can be divided into two spatial forms: convex and concave.

[0008] The anti-blocking component includes a trigger and a unclogging component that are fixedly connected to the pipeline unit, and the trigger can control the state of the unclogging component.

[0009] As a preferred embodiment of the frustum-shaped composite horizontal subsurface flow constructed wetland system of the present invention, wherein: the arc-shaped wetland unit includes a pool body and a substrate disposed inside the pool body, the pool bodies are arranged in an arc shape with the same central angle but different radii and elevations, the height difference between each pool body is not greater than 0.7, and the length-to-width ratio of the pool body is not greater than 15.

[0010] As a preferred embodiment of the frustum-shaped composite horizontal subsurface flow constructed wetland system of the present invention, the pool body comprises a flat pool bottom, an arc-shaped wall, and a partition wall. The height of the arc-shaped wall and the partition wall is 0.6-1.6m. The flat pool bottom is constructed by pouring impermeable concrete and laying an impermeable membrane for impermeability treatment. The substrate is laid at a height 5-15cm lower than the upper edge of the arc-shaped wall and the partition wall.

[0011] As a preferred embodiment of the frustum-shaped composite horizontal subsurface flow constructed wetland system of the present invention, the water control component can be divided into a central inlet well unit and a central collection well unit according to the arrangement of the stepped wetland pool. The central inlet well unit is suitable for convex wetland systems, and the central collection well unit is suitable for concave wetland systems. The central inlet well unit includes a columnar pool and an overflow outlet located at the top.

[0012] As a preferred scheme of the circular-tray type composite horizontal subsurface flow constructed wetland system, the pipe network unit comprises an inlet pipe, a perforated water distribution pipe, a perforated water collection pipe, a connecting pipe connecting the upper and lower pool bodies, and an outlet pipe, the pool bodies arranged in a stepped manner are connected in a zigzag water flow by using a series or parallel mode, the perforated water distribution pipe and the perforated water collection pipe are arranged on the two sides of the partition wall in parallel, the perforated water distribution pipe and the perforated water collection pipe are connected to the perforated water distribution pipe of the next wetland unit through the connecting pipe, and the pool bottom slope is 0.2%.

[0013] As a preferred scheme of the circular-tray type composite horizontal subsurface flow constructed wetland system, the trigger member comprises a trigger pipe fixedly connected with the outlet pipe, a matching pipe, and a conversion box in conductive connection with the trigger pipe and the matching pipe, the trigger member is arranged at a bending position of the outlet pipe, and the conversion box is opposite to a corner of the outlet pipe.

[0014] As a preferred scheme of the circular-tray type composite horizontal subsurface flow constructed wetland system, the trigger pipe comprises a pressure sensor arranged at a position where the trigger pipe communicates with the outlet pipe, and a trigger post in electrical connection with the pressure sensor, and an end portion of the trigger post is provided with a limiting post.

[0015] As a preferred scheme of the circular-tray type composite horizontal subsurface flow constructed wetland system, the matching pipe comprises a liquid wheel arranged in the outlet pipe and a flow limiting frame arranged around the liquid wheel, and an auxiliary shaft coaxially rotating with the liquid wheel, the auxiliary shaft is internally provided with a clamping post fixedly connected through a first spring, the matching pipe further comprises a locking post in abutting connection with the clamping post, the locking post is fixedly connected with the inner wall of the matching pipe through a second spring, and a locking groove is further arranged on the locking post.

[0016] As a preferred scheme of the circular-tray type composite horizontal subsurface flow constructed wetland system, the dredging member comprises a gravity post arranged in a dredging pipe, a rotating shaft arranged in the center of the gravity post, and dredging teeth arranged at the bottom of the rotating shaft, the dredging teeth coaxially rotate with the rotating shaft, and the gravity post is fixedly connected with the conversion box through a compression spring.

[0017] As a preferred scheme of the circular-tray type composite horizontal subsurface flow constructed wetland system, the gravity post is internally provided with a sliding column, a clamping groove arranged on one side surface of the gravity post, a locking column in embedded connection with the locking groove on the other side, and a drainage pipe fixedly connected with the gravity post, the drainage pipe is internally provided with a squeezing column and a drainage hole arranged on the surface of the drainage pipe, and the rotating shaft is provided with a sliding groove in connection with the sliding column.

[0018] The present application has the beneficial effects that: the present application further creatively optimizes the classic horizontal subsurface flow constructed wetland, reasonably utilizes the height difference and space form design to lengthen the water flow path in the wetland, optimizes the water power, enhances the denitrification and phosphorus removal capacity of the wetland, and improves the purification efficiency; meanwhile, the water distribution mode and pipe network system are ingeniously designed to scientifically and simply distribute the treatment water amount of the wetland, to provide the possibility for more flexible use of the site space; meanwhile, the pipe anti-blocking requirement is considered to reduce the blocking risk; the space topography is innovatively used in the design, the circular form increases the site utilization rate, enriches the space interest and ornamental nature of the constructed wetland itself, and can better match the site and better integrate into the landscape environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0020] Figure 1 It is a scene diagram of the upper convex type wetland system of the circular table type composite horizontal subsurface flow constructed wetland system.

[0021] Figure 2 It is a structure diagram of the water control part of the circular table type composite horizontal subsurface flow constructed wetland system.

[0022] Figure 3 It is a lower concave type wetland system diagram of the circular table type composite horizontal subsurface flow constructed wetland system.

[0023] Figure 4 It is a cross-sectional view of the upper convex type wetland system of the circular table type composite horizontal subsurface flow constructed wetland system.

[0024] Figure 5 It is a cross-sectional view of the lower concave type wetland system of the circular table type composite horizontal subsurface flow constructed wetland system.

[0025] Figure 6 It is a structure diagram of the anti-blocking assembly of the circular table type composite horizontal subsurface flow constructed wetland system.

[0026] Figure 7 It is an exploded view of the anti-blocking assembly of the circular table type composite horizontal subsurface flow constructed wetland system.

[0027] Figure 8 It is a cooperation diagram of the cooperating pipe and the gravity pile of the circular table type composite horizontal subsurface flow constructed wetland system.

[0028] Figure 9 It is a structure diagram of the cooperating pipe of the circular table type composite horizontal subsurface flow constructed wetland system.

[0029] Figure 10 is a cross-sectional view of the matching pipe of the circular-tray type composite horizontal subsurface flow constructed wetland system.

[0030] Figure 11 is a structure diagram of the gravity pile of the circular-tray type composite horizontal subsurface flow constructed wetland system.

[0031] Figure 12 is another angle structure diagram of the gravity pile of the circular-tray type composite horizontal subsurface flow constructed wetland system.

[0032] Figure 13 is an enlarged view of Q of the circular-tray type composite horizontal subsurface flow constructed wetland system.

[0033] Figure 14 is another perspective structure diagram of the gravity pile of the circular-tray type composite horizontal subsurface flow constructed wetland system.

[0034] Figure 15 is a structure diagram of the dredging member of the circular-tray type composite horizontal subsurface flow constructed wetland system. DETAILED DESCRIPTION

[0035] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without these specific details. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Therefore, the specific details set forth are merely exemplary. The general principles are the same.

[0037] Secondly, "one embodiment" or "an embodiment" as used herein means including, as a specific feature, structure or characteristic, in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor does it mean an embodiment that is mutually exclusive with other embodiments, alone or selectively.

[0038] Example 1

[0039] Reference Figures 1-3 In the first embodiment of the present application, the embodiment provides a circular-tray type composite horizontal subsurface flow constructed wetland system, which comprises a stepped wetland pool 100 and a anti-blocking assembly 200. The effluent of the sedimentation pool is divided by the pipe network unit 103 to pass through three sets of horizontal subsurface flow constructed wetlands in parallel. The horizontal subsurface flow constructed wetland occupies an area of about 650 square meters, and the design daily water treatment capacity is 300 tons. The wetland inlet water is the nearby river water, and the water quality is inferior V to IV. The effluent water quality standard is III water.

[0040] Specifically, the stepped wetland pool 100 comprises the arc-shaped wetland units 101, the water control members 102 and the pipe network units 103 penetrating through the arc-shaped wetland units 101, the arc-shaped wetland units 101 are connected in series and arranged in a stepped manner, each arc-shaped wetland unit 101 is arranged around the water control member 102, the number of the arc-shaped wetland units 101 is not less than one group, the stepped wetland pool 100 adopts a reasonable radius and a number of steps according to the base scale, the stepped wetland pool 100 is connected in parallel to form an artificial wetland system, and a maintenance channel 104 is arranged between each stepped wetland pool 100, and the artificial wetland system can be divided into two space forms of upper convex and lower concave types.

[0041] Preferably, the anti-blocking assembly 200 comprises the trigger member 201 fixedly connected with the pipe network unit 103 and the dredging member 202, and the trigger member 201 can control the state of the dredging member 202, and when the trigger member 201 senses pipe blockage, the dredging member 202 can be automatically dredged and cleaned inside the pipe, and after the dredging is completed, the dredging member 202 stops working.

[0042] In use, the circular table type composite horizontal subsurface flow artificial wetland system is used for landscape water treatment in a city riverside green space, purifies river water introduced into the site for waterscape use, so as to save water resources, optimize site microclimate and enrich site habitat. The site space form has its own characteristics, mainly taking a circular theme and having rich elevations, and the project combines the space design scheme to create an upper convex or lower concave type circular ring stepped composite horizontal subsurface flow artificial wetland, saves land use, utilizes the elevation to subdivide space, prolongs the treatment flow line, enhances the purification efficiency, beautifies the ornamental nature of the artificial wetland, and improves the smoothness of pipe output through the anti-blocking assembly 200.

[0043] Embodiment 2

[0044] Reference Figure 4 and Figure 5 This is the second embodiment of the present application, which is based on the previous embodiment.

[0045] Specifically, the arc-shaped wetland unit 101 comprises the pool body 101a and the substrate 101b arranged in the pool body 101a, the pool body 101a is arranged in an arc shape with the same central angle but different radii and elevations, the elevation difference of each pool body 101a is not greater than 0.7 m, and the length-width ratio of the pool body 101a is not greater than 15, the front 20 cm of the water inlet area and the water outlet area of the substrate layer is a water distribution area and a water collection area, the substrate is filled with gravel with a particle size of 20-50 mm, and the remaining part is filled with crushed stone with a particle size of 5-15 mm. The elevation difference between the substrate 101b and the pool top is 10 cm.

[0046] Preferably, the pool body 101a is composed of a flat pool bottom 101a-1, an arc-shaped wall 101a-2, and a partition wall 101a-3, the height of the arc-shaped wall 101a-2 and the partition wall 101a-3 is 0.6-1.6m, the flat pool bottom 101a-1 is poured with anti-seepage concrete and laid with an anti-seepage membrane for anti-seepage treatment, and the substrate 101b is laid to a height of 5-15cm lower than the upper edge of the arc-shaped wall and the partition wall.

[0047] Preferably, the water control member 102 can be divided into a central water inlet well unit 102a and a central water collection well unit 102b according to the setting of the stepped wetland pool 100, the central water inlet well unit 102a is suitable for an upper convex wetland system, the central water collection well unit 102b is suitable for a lower concave wetland system, the central water inlet well unit 102a includes a columnar pool 102a-1 and an overflow port 102a-2 arranged at the top end.

[0048] Preferably, the pipe network unit 103 includes a water inlet pipe 103a, a perforated water distribution pipe 103b, a perforated water collection pipe 103c, a connecting pipe 103d connecting the upper and lower pool bodies 101a, and a water outlet pipe 103e, the pool bodies 101a distributed in a step shape are connected in a zigzag water flow pattern in a series or parallel mode, the perforated water distribution pipe 103b and the perforated water collection pipe 103c are arranged in parallel on the two sides of the partition wall 101a-3, the perforated water distribution pipe 103b and the perforated water collection pipe 103c are connected to the perforated water distribution pipe 103b of the next step wetland unit through the connecting pipe 103d, the pool bottom slope is 0.2%, a circular stepped circular compound horizontal subsurface flow artificial wetland system is constructed, first, the original sloping land topography is modified and the foundation is constructed, then the concrete pool body 101a is poured according to the engineering design elevation, and the pipe interfaces are left, among which, the perforated water distribution pipe 103b is about 10cm above the pool bottom, the perforated water collection pipe 103c is flush with the water surface, about 10cm below the pool top, and is connected to the water distribution pipe 103b of the next step through the connecting pipe 103d. The concrete pool bottom needs to be treated for anti-seepage, and the perforated water distribution pipe 103b and the perforated water collection pipe 103c are stacked layer by layer, mainly for increasing the purification efficiency.

[0049] A central water distribution well or water collection well is constructed, the central water collection well is a double-layer structure, and the inner ring wall is provided with an overflow port. The pool body also needs to be treated for anti-seepage.

[0050] In use, the upper convex water body is connected by the water inlet pipe 103a to the central water inlet well unit 102a, then connected by the connecting pipe 103d to the perforated water distribution pipe 103b inside the wetland, the other end is provided with a perforated water collecting pipe 103c, and the connecting pipe 103d is connected to the perforated water distribution pipe 103b of the next layer of wetland, and the cycle is repeated, the flow direction changes in turn, the water flow inside the unit group forms a "Z" shape downward, and finally flows out of the wetland. The lower concave type is controlled by the change of pipe diameter to control the water inflow, different water inlet pipes 103a enter the parallel uppermost small unit, and the water flow "Z" shape downward, and finally converges to the central water collecting well unit 102b and then uniformly flows out of the wetland.

[0051] Embodiment 3

[0052] Reference Figures 6-15 For the third embodiment of the present application, this embodiment is based on the previous two embodiments. Specifically, the trigger piece 201 includes a trigger pipe 201a fixedly connected with the water outlet pipe 103e, a matching pipe 201b, and a conversion box 201c in conductive connection with the trigger pipe 201a and the matching pipe 201b, the trigger piece 201 is arranged at the bending part of the water outlet pipe 103e, and the conversion box 201c is opposite to the corner of the water outlet pipe 103e. It is worth noting that the trigger pipe 201a, the matching pipe 201b, and the dredging pipe A are in sealed connection with the water outlet pipe 103e and the conversion box 201c, and the components mentioned below are working inside the upper pipe and are also sealed. Under the initial normal state, the trigger post 201a-2 and the lock groove 201b-8 lock the gravity post 202a.

[0053] Preferably, the trigger pipe 201a comprises a pressure sensor 201a-1 arranged at the position where the trigger pipe 201a communicates with the water outlet pipe 103e, and a trigger post 201a-2 electrically connected with the pressure sensor 201a-1, the end of the trigger post 201a-2 is provided with a limiting post 201a-3, the pressure sensor 201a-1 can adopt MPX5050DP, and we need to set a threshold value for the pressure sensor 201a-1 in advance, since the pressure sensor 201a-1 can control the trigger post 201a-2 to act, the specific circuit involves the microprocessor in the control module, the electric actuator in the execution module and the battery, the pressure sensor 201a-1 is electrically connected with the microprocessor to transmit the detected pressure signal to the microprocessor, then the microprocessor is also electrically connected with the electric actuator, so it sends an instruction to the electric actuator at this time, and then drives the trigger post 201a-2 to act, and the battery provides power supply for all modules, and is effectively connected with each module through a cable, when the water outlet pipe 103e is blocked, the pressure in the pipe rises, when it reaches the threshold value set by the pressure sensor 201a-1, the pressure signal is transmitted to the control module, and then an execution instruction is sent to the execution module, which first drives the trigger post 201a-2 to move away from the gravity post 202a, since there is a curvature on the limiting post 201a-3 and the clamping groove 202a-2, the limiting post 201a-3 will leave the clamping groove 202a-2 on the gravity post 202a, realizing the first unlocking of the gravity post 202a, the microprocessor can adopt K6 type, and the electric actuator can adopt DKJ series type.

[0054] Preferably, the matching pipe 201b includes a liquid wheel 201b-1 arranged inside the water outlet pipe 103e, a flow limiting frame 201b-2 arranged around the liquid wheel 201b-1, and an auxiliary shaft 201b-3 coaxially rotating with the liquid wheel 201b-1, the auxiliary shaft 201b-3 is internally provided with a clamping post 201b-5 fixedly connected through a first spring 201b-4, the matching pipe 201b further includes a locking post 201b-6 abutting with the clamping post 201b-5, the locking post 201b-6 is fixedly connected with the inner wall of the matching pipe 201b through a second spring 201b-7, and a locking groove 201b-8 is further arranged on the locking post 201b-6, since the liquid wheel 201b-1 rotates at a high speed under the impact of the water flow inside the pipeline in a normal state, the auxiliary shaft 201b-3 will also rotate, under the action of centrifugal force, the clamping post 201b-5 acts outwardly, since the locking post 201b-6 abuts with the clamping post 201b-5, the clamping post 201b-5 will lift the locking post 201b-6 upwardly, and the locking groove 201b-8 will be clamped into the locking column 202a-3, and since the clamping posts 201b-5 are arranged in a relatively dense manner, when there is a gap and the locking post 201b-6 is not lifted up, although the locking groove 201b-8 will have a tendency to be separated from the locking column 202a-3, since the locking groove 201b-8 is lifted to a relatively deep depth, the locking groove 201b-8 is still clamped in the locking column 202a-3, and then the next clamping post 201b-5 lifts the locking post 201b-6;

[0055] However, when the blockage occurs, there is no water flow impact on the liquid wheel 201b-1, and the auxiliary shaft 201b-3 will also stop rotating, so the centrifugal force disappears, the clamping post 201b-5 is retracted to the original position under the action of the first spring 201b-4, and the locking post 201b-6 will not be lifted, so the locking groove 201b-8 will be separated from the locking column 202a-3, realizing the second unlocking of the gravity post 202a.

[0056] Preferably, the dredging piece 202 includes a gravity post 202a arranged inside the dredging pipe A, a rotating shaft 202b arranged in the center of the gravity post 202a, and a dredging tooth 202c arranged at the bottom of the rotating shaft 202b, the dredging tooth 202c rotates coaxially with the rotating shaft 202b, and the gravity post 202a is fixedly connected with the conversion box 201c through a compression spring 202d, after the gravity post 202a is unlocked, the gravity post 202a will pull the compression spring 202d downwardly due to its own gravity, and the height of the downward movement is matched with the length of the extrusion column 202a-5 reaching the dredging pipe A and the elastic force of the compression spring 202d.

[0057] Preferably, the gravity pile 202a is internally provided with a sliding column 202a-1, a clamping groove 202a-2 provided on one side surface of the gravity pile 202a, a locking column 202a-3 embedded and matched with the locking groove 201b-8 on the other side, and a drainage pipe 202a-4 fixedly connected with the gravity pile 202a, the drainage pipe 202a-4 is internally provided with an extrusion column 202a-5 and a drainage hole 202a-6 provided on the surface of the drainage pipe 202a-4, and the rotating shaft 202b is provided with a sliding groove 202b-1 matched with the sliding column 202a-1, when the gravity pile 202a descends, the sliding column 202a-1 slides along the sliding groove 202b-1, so as to drive the rotating shaft 202b to rotate, and then the dredging tooth 202c also rotates, so as to dredge the blocked pipeline in the first step, and in the process of continuous descent of the gravity pile 202a, the extrusion column 202a-5 first encounters the garbage blocked in the pipeline, so that the extrusion column 202a-5 is pushed into the interior of the drainage pipe 202a-4, and the drainage pipe 202a-4 is internally provided with a dredging liquid, which flows out from the drainage hole 202a-6 under the action of extrusion, and it is worth noting that the drainage hole 202a-6 is provided with a rubber soft pad, which is in a sealed state when there is no internal pressure, and once there is pressure, it will start to release, and after descending to a certain position, the elastic force accumulated by the compression spring 202d reaches a certain degree, so as to pull the gravity pile 202a back to the original position, if the congestion state still exists at this time, repeat the above operation;

[0058] When the blockage disappears, the pressure sensor 201a-1 drives the trigger pile 201a-2 to relock the gravity pile 202a, and the locking pile 201b-6 is also embedded in the locking groove 201b-8 to lock the gravity pile 202a.

[0059] And it needs to be explained that the purpose of our double unlocking is that the pressure inside the pipeline may be affected by many factors, such as temperature and other factors, so that the pressure sensor 201a-1 will misoperate, and the liquid wheel 201b-1 will also become slow due to the flow rate and other reasons, resulting in unstable locking of the gravity pile 202a.

[0060] In use, in the initial normal state, the trigger stake 201a-2 and the lock slot 201b-8 both lock the gravity stake 202a, when the outflow pipe 103e is blocked, the internal pressure of the pipe rises, and when it reaches the threshold set by the pressure sensor 201a-1, the trigger stake 201a-2 will first move away from the gravity stake 202a, because the limiting stake 201a-3 and the clamping groove 202a-2 both have a curvature, at this time the limiting stake 201a-3 will move away from the clamping groove 202a-2 on the gravity stake 202a, achieving the first unlocking of the gravity stake 202a, because the liquid wheel 201b-1 rotates at high speed under the impact of the water flow in the pipe in the normal state, the auxiliary shaft 201b-3 will also rotate, under the action of centrifugal force, the clamping stake 201b-5 moves outward, because the lock stake 201b-6 is in abutment with the clamping stake 201b-5, the clamping stake 201b-5 will lift the lock stake 201b-6 upward, and the lock slot 201b-8 will be clamped into the lock column 202a-3, and because the clamping stakes 201b-5 are densely arranged, when some of the clamping stakes 201b-5 do not lift the lock stake 201b-6, although the lock slot 201b-8 will tend to disengage from the lock column 202a-3, because the lock slot 201b-8 is deeply inserted, the lock slot 201b-8 is still clamped in the lock column 202a-3, and then the next clamping stake 201b-5 lifts the lock stake 201b-6, but when the pipe is blocked, the liquid wheel 201b-1 is not impacted by the water flow, the auxiliary shaft 201b-3 also stops rotating, so the centrifugal force disappears, the clamping stake 201b-5 is retracted to the original position under the action of the first spring 201b-4, the lock stake 201b-6 is not lifted, and the lock slot 201b-8 disengages from the lock column 202a-3, achieving the second unlocking of the gravity stake 202a, after the gravity stake 202a is unlocked, the gravity stake 202a will be pulled downward by the compression spring 202d, the slide column 202a-1 will slide along the slide groove 202b-1, thus driving the rotating shaft 202b to rotate, and then the dredging teeth 202c will also rotate, to perform the first step of dredging the blocked pipe, and in the process of the gravity stake 202a continuing to descend, the extrusion column 202a-5 will first encounter the garbage blocking the pipe, and then the extrusion column 202a-5 will be inserted into the interior of the drainage pipe 202a-4, the drainage pipe 202a-4 contains dredging liquid, which will flow out of the drainage hole 202a-6 under the action of extrusion, and it is worth noting that the drainage hole 202a-6 is provided with a rubber cushion, which is in a sealed state when there is no pressure inside, and once there is pressure, it will start to release, and after descending to a certain position, the elastic force accumulated by the compression spring 202d reaches a certain degree, and the gravity stake 202a is pulled back to the original position, if the pipe is still blocked at this time, the above operation is repeated;

[0061] When the blockage disappears, the pressure sensor 201a-1 will drive the trigger post 201a-2 to re-lock the gravity post 202a, and the lock post 201b-6 will also be embedded into the lock slot 201b-8 so that the gravity post 202a is locked.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A frustum compound horizontal subsurface flow constructed wetland system characterized in that: The step type wetland pool (100) comprises arc-shaped wetland units (101), water control components (102), and pipe network units (103) penetrating through each of the arc-shaped wetland units (101), the arc-shaped wetland units (101) are connected in series and arranged in a step shape, each of the arc-shaped wetland units (101) is arranged around the water control component (102), the number of the arc-shaped wetland units (101) is not less than one group, the step type wetland pool (100) adopts a reasonable radius and a number of steps according to the base size, the step type wetland pool (100) is connected in parallel to form the artificial wetland system, a maintenance channel (104) is arranged between each of the step type wetland pools (100), and the artificial wetland system is divided into two types of space forms, i.e., an upper convex type and a lower concave type; The arc-shaped wetland unit (101) comprises a pool body (101a) and a substrate (101b) arranged in the pool body (101a); the pool body (101a) comprises a planar pool bottom (101a-1), an arc-shaped wall (101a-2), and a partition wall (101a-3); The anti-blocking assembly (200) comprises a trigger component (201) and a dredging component (202) fixedly connected with the pipe network unit (103), and the trigger component (201) can control the state of the dredging component (202); The pipe network unit (103) comprises a water inlet pipe (103a), a perforated water distribution pipe (103b), a perforated water collection pipe (103c), a connecting pipe (103d) connecting the pool bodies (101a) of two steps, and a water outlet pipe (103e), and the pool bodies (101a) arranged in a step shape are connected in a zigzag shape by using a series connection mode or a parallel connection mode; The trigger component (201) comprises a trigger pipe (201a) fixedly connected with the water outlet pipe (103e), a matching pipe (201b), and a conversion box (201c) in conductive connection with the trigger pipe (201a) and the matching pipe (201b), the trigger component (201) is arranged at a bending position of the water outlet pipe (103e), and the conversion box (201c) is opposite to a corner of the water outlet pipe (103e); The trigger pipe (201a) comprises a pressure sensor (201a-1) arranged at a position where the trigger pipe (201a) communicates with the water outlet pipe (103e), and a trigger post (201a-2) in electrical connection with the pressure sensor (201a-1), and an end portion of the trigger post (201a-2) is provided with a limiting post (201a-3); The dredging component (202) comprises a gravity post (202a) arranged in a dredging pipe (A), a rotating shaft (202b) arranged at a central position in the gravity post (202a), and dredging teeth (202c) arranged at a bottom portion of the rotating shaft (202b), the dredging teeth (202c) rotate coaxially with the rotating shaft (202b), and the gravity post (202a) is fixedly connected with the conversion box (201c) through a compression spring (202d).

2. The frustum composite horizontal subsurface flow constructed wetland system of claim 1, wherein: The pool bodies (101a) are arranged in an arc shape with the same central angle but different radii and elevations, the elevation difference of each pool body (101a) is not greater than 0.7m, and the length-width ratio of the pool body (101a) is not greater than 15.

3. The frustum composite horizontal subsurface flow constructed wetland system of claim 2, wherein: The arc-shaped wall (101a-2) and the partition wall (101a-3) have a height of 0.6-1.6m, the flat pool bottom (101a-1) is poured with anti-seepage concrete and is treated by laying an anti-seepage membrane, and the substrate (101b) is laid to a height of 5-15cm lower than the upper edge of the arc-shaped wall and the partition wall.

4. The frustum composite horizontal subsurface flow constructed wetland system of claim 3, wherein: The water control member (102) is divided into a central water inlet well unit (102a) and a central water collection well unit (102b) according to the arrangement of the stepped wetland pool (100), the central water inlet well unit (102a) is suitable for an upper convex wetland system, the central water collection well unit (102b) is suitable for a lower concave wetland system, and the central water inlet well unit (102a) comprises a columnar pool (102a-1) and an overflow port (102a-2) arranged at the top end.

5. The frustum composite horizontal subsurface flow constructed wetland system of claim 4, wherein: The perforated water distribution pipe (103b) and the perforated water collection pipe (103c) are arranged in parallel on the two sides of the partition wall (101a-3), the perforated water distribution pipe (103b) and the perforated water collection pipe (103c) are connected to the perforated water distribution pipe (103b) of the next step wetland unit through the connecting pipe (103d), and the pool bottom slope is 0.2%.

6. The frustum composite horizontal subsurface flow constructed wetland system of claim 5, wherein: The matching pipe (201b) comprises a liquid wheel (201b-1) arranged inside the water outlet pipe (103e) and a flow limiting frame (201b-2) arranged around the liquid wheel (201b-1), an auxiliary shaft (201b-3) coaxially rotating with the liquid wheel (201b-1), a clamping post (201b-5) fixedly connected by a first spring (201b-4) arranged inside the auxiliary shaft (201b-3), and a locking post (201b-6) abutting and matching with the clamping post (201b-5), the locking post (201b-6) being fixedly connected with the inner wall of the matching pipe (201b) by a second spring (201b-7), and a lock groove (201b-8) being arranged on the locking post (201b-6).

7. The frustum composite horizontal subsurface flow constructed wetland system of claim 6, wherein: The gravity pile (202a) is internally provided with a sliding column (202a-1), a clamping groove (202a-2) arranged on one side surface of the gravity pile (202a), a locking column (202a-3) embedded and matched with the lock groove (201b-8) on the other side, and a liquid discharge pipe (202a-4) fixedly connected with the gravity pile (202a), the liquid discharge pipe (202a-4) is internally provided with a squeezing column (202a-5) and a liquid discharge hole (202a-6) arranged on the surface of the liquid discharge pipe (202a-4), and the rotating shaft (202b) is provided with a sliding groove (202b-1) matched with the sliding column (202a-1).

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