Intercepting ditch for in-situ remediation of water ecological function of middle and small river basins
By setting up a cross-flow ditches system along the river in the small and medium river basins, and using filtration and phosphorus removal components to treat phosphorus-containing substances in surface runoff, the problems of eutrophication and water bloom in the river water body were solved, and the significant improvement of river water quality was achieved.
Patent Information
- Application Number
- CN202421597280.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The water ecology of small and medium-sized river basins is affected by phosphorus-containing water flows in surface runoffs on both sides of the river, resulting in water blooms such as eutrophication of water bodies and cyanobacteria eruptions, seriously deteriorating river water quality.
A flow interceptor trench system is designed, including a flow interceptor trench and a flow interceptor unit arranged along the river. The flow interceptor unit is composed of a U-shaped flow interceptor body, a filter assembly and a phosphorus removal assembly. The filter assembly is located on the upper part to filter physical impurities in the water stream; the phosphorus removal assembly is located on the lower part to repair the water stream in situ by adsorbing phosphorus-containing substances.
Effectively gather and filter surface runoff along the river bank, reduce the direct entry of phosphorus-containing water into the river, avoid water blooms such as cyanobacteria eruptions in water bodies, and significantly improve river water quality.
Smart Images
Figure CN222796629U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of river regulation, in particular to an intercepting ditch used for in-situ restoration of water ecological functions in small and medium-sized river basins. Background Art
[0002] The development of phosphorus chemical industry has caused increasingly serious environmental pollution. The phosphate in river water mainly comes from various domestic sewage, groundwater, and wastewater discharged by some factories. When it rains, the surface runoff formed by the slopes on both sides of the river will directly flush the phosphorus-containing water into the river through the river banks on both sides, causing eutrophication of the water body, resulting in algal blooms and other algal blooms in the water body, causing the water quality of the river to deteriorate.
[0003] At present, the country is vigorously carrying out river regulation work and requires zero tolerance for river pollution. Therefore, for the water ecology of small and medium-sized river basins, how to prevent the surface runoff on both sides of the river from directly entering the river through the river banks, thereby avoiding algal blooms such as blue algae outbreaks in the river, is an urgent problem to be solved in this field. Utility Model Content
[0004] The purpose of the utility model is to provide an interception ditch for in-situ restoration of water ecological functions in small and medium-sized river basins, which can gather surface runoff along the river into the interception ditches on both sides of the river, and directly remove phosphorus from the surface runoff flowing into the interception ditch inside the interception ditch before discharging it to a designated area along the interception ditch, thereby preventing surface runoff on both sides of the river from directly entering the river through the river banks on both sides with phosphorus-containing water, and effectively avoiding algal blooms such as blue algae outbreaks in the river.
[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides an interception ditch for in-situ restoration of water ecological functions in small and medium-sized river basins, wherein the interception ditch comprises an interception ditch arranged on both sides of the river and extending along the flow direction of the river, and a plurality of interception ditch units arranged in the interception ditch along the extension direction of the interception ditch, wherein the interception ditch unit comprises:
[0006] A intercepting ditch body with a U-shaped cross section, and a filtering component and a phosphorus removal component arranged in the intercepting ditch body, wherein:
[0007] The filter assembly is arranged on the upper part of the intercepting ditch body, and is used to filter the water flowing into the intercepting ditch body to filter out physical impurities in the water flow;
[0008] The phosphorus removal component is arranged below the filter component. A water passage for water flow is provided inside the phosphorus removal component. The phosphorus removal component is used to absorb phosphorus-containing substances in the water flow flowing into the intercepting ditch body to achieve in-situ repair of the phosphorus-containing water flow, and allow the water flow after phosphorus absorption to flow to the designated downstream area through the water passage.
[0009] Preferably, the phosphorus removal assembly includes a first limiting support block symmetrically arranged on the left and right inner walls of the intercepting ditch body and a first regenerable phosphorus absorbing block laid flat on the first limiting support block, and the water passage is arranged below the first regenerable phosphorus absorbing block.
[0010] Preferably, the phosphorus removal assembly further comprises a supporting orifice plate, and the supporting orifice plate is laid flat between the first regenerable phosphorus absorption block and the first limiting support block.
[0011] Preferably, the phosphorus removal assembly further comprises a second limiting support block symmetrically arranged on the left and right inner walls of the intercepting ditch body and located below the first limiting support block, a limiting orifice plate laid on the second limiting support block and a plurality of second regenerable phosphorus absorption blocks, wherein:
[0012] The limiting orifice plate is provided with a plurality of limiting through holes spaced apart along its width direction, a water drop through hole is provided on the limiting orifice plate between two adjacent limiting through holes, the plurality of second regenerative phosphorus absorbing blocks are correspondingly inserted into the plurality of limiting through holes so as to limit the second regenerative phosphorus absorbing blocks in the horizontal direction through the limiting through holes, and the water passage is formed between two adjacent second regenerative phosphorus absorbing blocks.
[0013] Preferably, the phosphorus removal component also includes a limiting base laid on the bottom inner wall of the intercepting ditch body, and a plurality of limiting grooves are opened on the top surface of the limiting base, and the plurality of limiting grooves are arranged one by one corresponding to the plurality of limiting through holes, and the lower end of the second regenerable phosphorus absorption block is inserted into the limiting groove to limit the lower end of the second regenerable phosphorus absorption block through the limiting groove.
[0014] Preferably, a groove wall of the limiting groove is provided with a guiding slope.
[0015] Preferably, the filter assembly includes a rainwater grate, a filter grille and a three-dimensional drainage net, the three-dimensional drainage net is laid on the top surface of the first renewable phosphorus absorption block, the filter grille is laid on the top surface of the three-dimensional drainage net, and the rainwater grate is covered at the upper end opening of the intercepting ditch body.
[0016] Preferably, the intercepting ditch body is made of galvanized sheet.
[0017] Preferably, the top of the side wall of the intercepting ditch body is folded outward to form an inverted U-shaped hanging ear.
[0018] Preferably, an expansion joint is provided between two adjacent intercepting ditch units, and a U-shaped rubber waterstop is provided at the expansion joint, one end of the U-shaped rubber waterstop is sealedly connected to the intercepting ditch body of one of the intercepting ditch units, and the other end of the U-shaped rubber waterstop is sealedly connected to the intercepting ditch body of the other intercepting ditch unit.
[0019] It can be seen from the above technical scheme that the utility model provides an interception ditch for in-situ restoration of water ecological functions in small and medium-sized river basins. By setting the interception ditch on both sides of the river and extending the interception ditch along the flow direction of the river, the surface runoff along the river can be gathered into the interception ditch on both sides of the river. By setting a filtering component in the upper part of the interception ditch, physical impurities in the water flow are filtered, and the blockage of the interception ditch is effectively avoided. At the same time, by setting a phosphorus removal component in the lower part of the interception ditch, phosphorus is removed in situ in the interception ditch for the filtered surface runoff water flowing into the interception ditch, so as to achieve in-situ restoration of phosphorus-containing water flow. Finally, the surface runoff after phosphorus removal and restoration is discharged to a designated area along the interception ditch, thereby avoiding the surface runoff on both sides of the river from directly entering the river through the river banks on both sides, and effectively avoiding the occurrence of algae blooms in the river.
[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] The above additional aspects and / or advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0023] Figure 1 This is a schematic diagram of the location of the intercepting ditch used for in-situ restoration of water ecological functions in small and medium-sized river basins in a preferred embodiment of the utility model;
[0024] Figure 2 for Figure 1 A-section enlarged view (schematic diagram of the cross-sectional structure of the intercepting ditch);
[0025] Figure 3 for Figure 2 A magnified view of part B in FIG.
[0026] Figure 4This is a schematic diagram of the front structure of an intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins in a preferred embodiment of the utility model;
[0027] Figure 5 This is a structural schematic diagram of a preferred embodiment of the utility model, in which two intercepting ditch units of an intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins are connected at the expansion joint through a U-shaped rubber waterstop. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] like Figure 1-5 As shown, the embodiment of the utility model provides an interception ditch for in-situ restoration of water ecological functions in small and medium-sized river basins, the interception ditch includes an interception ditch 1 arranged on both sides of the river and extending along the flow direction of the river, and a plurality of interception ditch units 2 arranged in the interception ditch 1 along the extension direction of the interception ditch 1, wherein the interception ditch unit 2 includes:
[0030] The intercepting ditch body 21 has a U-shaped cross section, and the filtering component 22 and the dephosphorization component 23 are arranged in the intercepting ditch body 21, wherein:
[0031] The filter assembly 22 is disposed on the upper part of the intercepting ditch body 21, and the filter assembly 22 is used to filter the water flow flowing into the intercepting ditch body 21 to filter out physical impurities in the water flow;
[0032] The phosphorus removal component 23 is arranged below the filter component 22. A water passage 238 for water flow is provided inside the phosphorus removal component 23. The phosphorus removal component 23 is used to absorb phosphorus-containing substances in the water flow flowing into the intercepting ditch body 21 to achieve in-situ repair of the phosphorus-containing water flow, and allow the water flow after phosphorus absorption to flow to the designated downstream area through the water passage 238.
[0033] The interception ditch provided in this embodiment for in-situ restoration of water ecological functions in small and medium-sized river basins can gather surface runoff along the river into the interception ditch on both sides of the river by setting the interception ditch on both sides of the river and extending the interception ditch along the flow direction of the river. By setting a filter component 22 in the upper part of the interception ditch, physical impurities in the water flow are filtered, thereby effectively avoiding blockage of the interception ditch. At the same time, by setting a phosphorus removal component 23 in the lower part of the interception ditch, phosphorus is removed in situ in the interception ditch for the filtered surface runoff water flowing into the interception ditch, thereby achieving in-situ restoration of phosphorus-containing water flow. Finally, the surface runoff after phosphorus removal and restoration is discharged to a designated area along the interception ditch, thereby avoiding surface runoff on both sides of the river from directly entering the river through the river banks on both sides, thereby effectively avoiding algal blooms such as blue algae outbreaks in the river.
[0034] Specifically, in this embodiment, a complete intercepting ditch is formed by splicing a plurality of intercepting ditch units 2. Compared with the intercepting ditch of the concrete structure, its construction is more convenient and quick, the construction period is shorter, and the subsequent maintenance and replacement are more convenient. For the convenience of transportation and construction, the length of the intercepting ditch body 21 of the intercepting ditch unit 2 can be set to about 5 meters.
[0035] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the phosphorus removal component 23 includes a first limit support block 231 symmetrically arranged on the left and right inner walls of the intercepting ditch body 21 and a first regenerative phosphorus absorption block 232 flatly laid on the first limit support block 231, and the water passage 238 is arranged below the first regenerative phosphorus absorption block 232. The first limit support block 231 supports the first regenerative phosphorus absorption block 232. When the surface runoff flows into the intercepting ditch, the filter component 22 arranged at the upper part of the intercepting ditch filters the physical impurities such as dead branches, stones, and soil in the water flow, effectively avoiding the clogging of the intercepting ditch, and the filtered water flow enters the first regenerative phosphorus absorption block 232, and phosphorus is removed by the first regenerative phosphorus absorption block 232.
[0036] Specifically, in this embodiment, the first regenerable phosphorus absorbing block 232 is made of phosphorus absorbing material and clay minerals and sintered to form a regular water-permeable rectangular shape. After the first regenerable phosphorus absorbing block 232 is saturated, the filter assembly 22 on the upper part of the intercepting ditch body 21 can be opened regularly to replace the first regenerable phosphorus absorbing block 232. The saturated first regenerable phosphorus absorbing block 232 can be sent to the factory for regeneration and recycling.
[0037] It should be noted that the use of phosphorus absorbing materials and clay minerals to form regular, water-permeable rectangular renewable phosphorus absorbing blocks through sintering belongs to the prior art, and its working principle and production method will not be described in detail here.
[0038] like Figure 2As shown, based on the previous embodiment, in one embodiment, the dephosphorization component 23 further includes a supporting orifice plate 233 , and the supporting orifice plate 233 is laid flat between the first regenerable phosphorus absorbing block 232 and the first limiting support block 231 .
[0039] A support orifice plate 233 is provided between the first regenerable phosphorus absorbing block 232 and the first position-limiting support block 231, which is conducive to better supporting and protecting the first regenerable phosphorus absorbing block 232, and preventing the first regenerable phosphorus absorbing block 232 from being broken due to excessive local force. Holes are provided on the support orifice plate 233, which is conducive to the water passing through the first regenerable phosphorus absorbing block 232 to smoothly flow through the holes on the support orifice plate 233 into the lower water passage 238 of the intercepting groove 1 body.
[0040] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the phosphorus removal assembly 23 further includes a second limiting support block 234 symmetrically arranged on the left and right inner walls of the intercepting ditch body 21 and located below the first limiting support block 231, a limiting orifice plate 235 laid on the second limiting support block 234, and a plurality of second regenerable phosphorus absorption blocks 236, wherein,
[0041] A plurality of limiting through holes 2351 are provided on the limiting orifice plate 235 at intervals along its width direction, a water drop through hole 2352 is provided on the limiting orifice plate 235 between two adjacent limiting through holes 2351, a plurality of second regenerative phosphorus absorbing blocks 236 are correspondingly inserted into the plurality of limiting through holes 2351 so as to limit the second regenerative phosphorus absorbing blocks 236 in the horizontal direction through the limiting through holes 2351, and a water passage 238 is formed between two adjacent second regenerative phosphorus absorbing blocks 236.
[0042] By arranging a second limiting support block 234, a limiting orifice plate 235 and a plurality of second renewable phosphorus absorbing blocks 236 below the first renewable phosphorus absorbing block 232, the second limiting support block 234 supports the limiting orifice plate 235, and the limiting through holes 2351 on the limiting orifice plate 235 limit each second renewable phosphorus absorbing block 236. The provision of each second renewable phosphorus absorbing block 236 increases the surface area of the dephosphorization component 23, and can further dephosphorize the water flow after dephosphorization by the first renewable phosphorus absorbing block 232. In the process that the water flow in the intercepting ditch body 21 flows from upstream to downstream in the water passage 238 inside the intercepting ditch, the second renewable phosphorus absorbing block 236 can also dephosphorize the downstream water flow again, thereby improving the dephosphorization effect of the intercepting ditch, that is, improving the in-situ restoration effect of the water ecological function of the river basin.
[0043] Specifically, in this embodiment, the second regenerable phosphorus absorbing block 236 is made of phosphorus absorbing material and clay minerals and sintered to form a regular water-permeable rectangular shape. After the second regenerable phosphorus absorbing block 236 is saturated, the filter assembly 22, the first regenerable phosphorus absorbing block 232 and the supporting orifice plate 233 on the upper part of the intercepting ditch body 21 can be opened regularly to replace the second regenerable phosphorus absorbing block 236. The saturated second regenerable phosphorus absorbing block 236 can be sent to the factory for regeneration and recycling.
[0044] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the phosphorus removal component 23 also includes a limiting base 237 laid on the bottom inner wall of the intercepting ditch body 21, and a plurality of limiting grooves 2371 are opened on the top surface of the limiting base 237. The plurality of limiting grooves 2371 are arranged in a one-to-one correspondence with the plurality of limiting through holes 2351, and the lower end of the second regenerable phosphorus absorption block 236 is inserted into the limiting groove 2371 to limit the lower end of the second regenerable phosphorus absorption block 236 through the limiting groove 2371.
[0045] The setting of the limiting base 237 can better limit the position of each second regenerable phosphorus absorbing block 236, thereby preventing each second regenerable phosphorus absorbing block 236 from shaking under the action of the water flow.
[0046] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the groove wall of the limiting groove 2371 is provided with a guide slope 2372. In this way, when the second regenerable phosphorus absorbing block 236 is installed, the guide slope 2372 guides the second regenerable phosphorus absorbing block 236, so that the lower end of the second regenerable phosphorus absorbing block 236 can be installed in the limiting groove 2371 of the limiting base 237 more conveniently and quickly.
[0047] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the filter assembly 22 includes a rainwater grate 221, a filter grille 222 and a three-dimensional drainage net 223, the three-dimensional drainage net 223 is laid on the top surface of the first renewable phosphorus absorption block 232, the filter grille 222 is laid on the top surface of the three-dimensional drainage net 223, and the rainwater grate 221 is covered at the upper end opening of the intercepting ditch body 21.
[0048] The filter assembly 22 composed of a rainwater grate 221, a filter grille 222 and a three-dimensional drainage net 223 performs triple filtration on the surface runoff, effectively ensuring the filtering effect and preventing physical impurities from flowing into the water passage 238 at the bottom of the intercepting ditch body 21 and clogging the intercepting ditch. The rainwater grate 221 can also protect the intercepting ditch body 21 below and the filtering components and phosphorus removal components therein.
[0049] It should be noted that, in order to better ensure the filtering effect, the mesh sizes of the rainwater grate 221, the filter grille 222 and the three-dimensional drainage net 223 are reduced in sequence.
[0050] Based on the previous embodiment, in one embodiment, the intercepting ditch body 21 is made of galvanized sheet. The galvanized sheet has high strength, is not easy to rust, has excellent corrosion resistance, and has good corrosion resistance. Compared with the intercepting ditch with concrete structure, the galvanized sheet is used to make the intercepting ditch body 21, which is simpler to make and more convenient to disassemble and repair.
[0051] like Figure 2 , 3 As shown, based on the previous embodiment, in one embodiment, the top of the side wall of the intercepting ditch body 21 is folded outward to form an inverted U-shaped hanging ear 211. After installation, the ends of the inverted U-shaped hanging ears 211 can be embedded in the hanging grooves 5 on both sides of the intercepting ditch 1, so that the intercepting ditch body 21 can be quickly and firmly installed in the intercepting ditch 1 through the two inverted U-shaped hanging ears 211 on the left and right ends of the intercepting ditch body 21.
[0052] like Figure 4 , 5 As shown, on the basis of the previous embodiment, in one embodiment, an expansion joint 3 is provided between two adjacent intercepting ditch units 2, and a U-shaped rubber water stop 4 is provided at the expansion joint 3. One end of the U-shaped rubber water stop 4 is sealed and connected to the intercepting ditch body 21 of one of the intercepting ditch units 2 by bolts and / or waterproof sealant, and the other end of the U-shaped rubber water stop 4 is sealed and connected to the intercepting ditch body 21 of the other intercepting ditch unit 2 by bolts and / or waterproof sealant. The setting of the expansion joint 3 leaves a strain space for the change of the length of the intercepting ditch body 21 due to thermal expansion and contraction, thereby ensuring the connection effect between the two adjacent intercepting ditch units 2. The U-shaped rubber water stop 4 is provided at the expansion joint 3. On the one hand, it can prevent water from penetrating into the ground through the expansion joint 3 between the two adjacent intercepting ditch units 2, resulting in the water flow that cannot be completely dephosphorized causing pollution to the underground soil. On the other hand, the U-shaped rubber water stop 4 has a certain elasticity, which can effectively fill and adapt to the size change of the gap caused by thermal expansion and contraction in the expansion joint 3 between the two adjacent intercepting ditch units 2.
[0053] It should be understood that the use of "system", "device", "unit" and / or "module" in this application is only a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.
[0054] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.
[0055] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.
[0056] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
[0057] If a flow chart is used in the present application, the flow chart is used to illustrate the operations performed by the system according to the embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, each step can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a certain step or several steps of operations can be removed from these processes.
[0058] The above is a detailed introduction to an intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins provided by the utility model. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.
Claims
1. An intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins, characterized in that: The intercepting ditch comprises an intercepting ditch arranged on both sides of the river and extending along the flow direction of the river, and a plurality of intercepting ditch units arranged in the intercepting ditch along the extension direction of the intercepting ditch, wherein the intercepting ditch unit comprises: A intercepting ditch body with a U-shaped cross section, and a filtering component and a phosphorus removal component arranged in the intercepting ditch body, wherein: The filter assembly is arranged on the upper part of the intercepting ditch body, and is used to filter the water flowing into the intercepting ditch body to filter out physical impurities in the water flow; The phosphorus removal component is arranged below the filter component. A water passage for water flow is provided inside the phosphorus removal component. The phosphorus removal component is used to absorb phosphorus-containing substances in the water flow flowing into the intercepting ditch body to achieve in-situ repair of the phosphorus-containing water flow, and allow the water flow after phosphorus absorption to flow to the designated downstream area through the water passage.
2. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 1 is characterized in that: The phosphorus removal assembly includes a first limiting support block symmetrically arranged on the left and right inner walls of the intercepting ditch body and a first regenerable phosphorus absorbing block laid flat on the first limiting support block, and the water passage is arranged below the first regenerable phosphorus absorbing block.
3. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 2 is characterized in that: The phosphorus removal component further comprises a supporting orifice plate, and the supporting orifice plate is laid flat between the first regenerable phosphorus absorbing block and the first limiting supporting block.
4. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 3 is characterized in that: The phosphorus removal assembly also includes a second limiting support block symmetrically arranged on the left and right inner walls of the intercepting ditch body and located below the first limiting support block, a limiting orifice plate laid on the second limiting support block, and a plurality of second regenerable phosphorus absorption blocks, wherein: The limiting orifice plate is provided with a plurality of limiting through holes spaced apart along its width direction, a water drop through hole is provided on the limiting orifice plate between two adjacent limiting through holes, the plurality of second regenerative phosphorus absorbing blocks are correspondingly inserted into the plurality of limiting through holes so as to limit the second regenerative phosphorus absorbing blocks in the horizontal direction through the limiting through holes, and the water passage is formed between two adjacent second regenerative phosphorus absorbing blocks.
5. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 4 is characterized in that: The phosphorus removal component also includes a limiting base laid on the bottom inner wall of the intercepting ditch body, and a plurality of limiting grooves are opened on the top surface of the limiting base. The plurality of limiting grooves are arranged in one-to-one correspondence with the plurality of limiting through holes, and the lower end of the second regenerable phosphorus absorption block is inserted into the limiting groove to limit the lower end of the second regenerable phosphorus absorption block through the limiting groove.
6. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 5 is characterized in that: The groove wall of the limiting groove is provided with a guiding slope.
7. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 2 is characterized in that: The filter assembly includes a rainwater grate, a filter grille and a three-dimensional drainage net, the three-dimensional drainage net is laid on the top surface of the first renewable phosphorus absorption block, the filter grille is laid on the top surface of the three-dimensional drainage net, and the rainwater grate is covered at the upper end opening of the intercepting ditch body.
8. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to any one of claims 1 to 7, characterized in that: The intercepting ditch body is made of galvanized plate.
9. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to claim 8 is characterized in that: The top of the side wall of the intercepting ditch body is folded outward to form an inverted U-shaped hanging ear.
10. The intercepting ditch for in-situ restoration of water ecological functions in small and medium-sized river basins according to any one of claims 1 to 7 and 9, characterized in that: An expansion joint is provided between two adjacent intercepting ditch units, and a U-shaped rubber waterstop is provided at the expansion joint. One end of the U-shaped rubber waterstop is sealedly connected to the intercepting ditch body of one of the intercepting ditch units, and the other end of the U-shaped rubber waterstop is sealedly connected to the intercepting ditch body of the other intercepting ditch unit.