Prefabricated concrete rainwater collection trench based on multi-stage filtering and construction method

Abstract

This invention discloses a prefabricated concrete rainwater collection ditch based on multi-stage filtration and its construction method, relating to the field of building water-saving technology. It includes a concrete assembly mechanism with a filtration mechanism at its top and symmetrically arranged limiting mechanisms on its outer side. This prefabricated concrete rainwater collection ditch based on multi-stage filtration features long and short side plates on all four sides. First splicing blocks are located at both ends of the long side plates, and second splicing blocks are located at both ends of the short side plates. The first and second splicing blocks are staggered and connected, and limited by limiting pins. Both the long and short side plates are inserted into the sealing grooves on the top of the base plate for a sealed connection. A sealing pouring layer is provided on the inner sides of the structural base plate, the long side plates, and the short side plates for further sealing.

Description

Technical Field

[0001] This invention relates to the field of building water conservation technology, specifically to a prefabricated concrete rainwater collection ditch based on multi-stage filtration and its construction method. Background Technology

[0002] Rainwater harvesting ponds are devices used to collect rainwater. They can collect rainwater resources for reuse, thereby saving water resources and having good economic and social benefits.

[0003] In the prior art, such as the patent application CN201811597605.8 entitled "Precast Concrete Prestressed Molded Box Pump Rainwater Collection Tank and its Construction Method," the rainwater collection tank includes a tank bottom and tank walls. The tank bottom is integrally cast, and the outer side of the tank walls is provided with multiple layers of steel wires. A cement mortar protective layer is sprayed onto the outer side of the steel wires. The rainwater collection tank contains multiple rectangular inner concrete slabs, which divide the rainwater collection tank into several smaller collection tanks, which are interconnected. In this invention, the tank bottom is cast on-site, and the tank walls and smaller collection tanks are assembled from outer and inner concrete slabs, respectively. This rainwater collection tank structure accelerates the construction speed of the rainwater collection tank.

[0004] Existing rainwater harvesting tanks have complex structural designs, making assembly inconvenient and difficult, which reduces operational efficiency and affects work progress.

[0005] Therefore, we propose a prefabricated concrete rainwater collection ditch based on multi-stage filtration and its construction method to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a prefabricated concrete rainwater collection ditch based on multi-stage filtration and its construction method, in order to solve the problem that the rainwater collection tanks mentioned in the background art have a relatively complex structural design, which makes them inconvenient to assemble and difficult to install, resulting in reduced operational efficiency and affecting the progress of the work.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a prefabricated concrete rainwater collection ditch based on multi-stage filtration, comprising a concrete assembly mechanism, a filtration mechanism at the top of the concrete assembly mechanism, and limit mechanisms symmetrically arranged on the outer side of the concrete assembly mechanism. The concrete assembly mechanism includes two long side plates and a short side plate. Several first splicing blocks are evenly distributed at both ends of the long side plates, and several second splicing blocks are evenly distributed at both ends of the short side plates. The first splicing blocks and the second splicing blocks are staggered and spliced. Limit pins are connected through the connection between the first splicing blocks and the second splicing blocks. A sealing pouring layer is provided on the inner wall between the long side plates and the short side plates.

[0008] The concrete assembly mechanism also includes an inner support column, the bottom of which is fixedly connected to an insert head. A limit frame is fixedly installed on the outer side of the insert head. Several positioning grooves are provided on the side of the inner support column. A fastening element is fastened to the inner side of the positioning groove. The bottom of the insert head is connected to an insert groove. A fastening frame is fixedly connected to the outer side of the insert groove. The fastening element is fastened to the outer side of the fastening frame. A fastening bolt is provided on the top of the fastening element. The bottom thread of the fastening bolt is on the inner bottom of the positioning groove.

[0009] Preferably, the filtration mechanism includes a connecting pipe, a top cover plate is installed on the top of the short side plate, the top cover plate is located on the top of the long side plate, the bottom of the connecting pipe is connected to the top cover plate, a secondary filter box is fixedly connected to the top of the connecting pipe, and a secondary filter element is provided on the inner side of the secondary filter box.

[0010] Preferably, the top of the secondary filter box is threadedly connected to the primary filter box, and the inner side of the primary filter box is provided with a primary filter element.

[0011] Preferably, the top of the primary filter box is threadedly connected to a connecting cover, and the top of the connecting cover is fixedly connected to a connecting ring.

[0012] Preferably, a buffer top cover is provided on the inner side of the connecting ring, and a liquid inlet hopper is fixedly connected to the top of the connecting ring.

[0013] Preferably, the limiting mechanism includes a limiting seat, a plurality of abutment strips are evenly distributed on the side of the limiting seat, and rotating sleeves are rotatably connected to both ends of the limiting seat, with a threaded adjusting rod threadedly connected to the inner side of the rotating sleeve.

[0014] Preferably, a rotating handle is provided on the outer side of the rotating sleeve, and a connecting seat is provided at one end of the threaded adjusting rod.

[0015] Preferably, a limiting cover plate is fixedly connected to the side of the connecting seat, and a plurality of anti-slip strips are evenly distributed on the inner side of the limiting cover plate.

[0016] Preferably, the bottom of the short side plate is connected to a base plate, the top of the base plate is provided with a sealing groove, the bottoms of the short side plate and the long side plate are both inserted into the inner side of the sealing groove, the top of the top cover plate is fixedly installed with an observation port, the top of the inner support column is fixedly connected to a connecting top plate, and the bottom of the sealed casting layer is installed with a structural base plate.

[0017] A method for constructing a prefabricated concrete rainwater harvesting ditch based on multi-stage filtration includes the following steps:

[0018] S1. During construction, the long side plate and the short side plate are respectively placed on the four sides. The first splicing block is set at both ends of the long side plate and the second splicing block is set at both ends of the short side plate. The first splicing block and the second splicing block are connected in an alternating manner and limited by the insertion of limit pins.

[0019] S2. Insert both the long and short side plates into the sealing groove at the top of the base plate for sealing connection. A sealing pouring layer is provided on the inner side of the structural base plate, the long side plate, and the short side plate for further sealing treatment. The top cover plate is installed on top for sealing treatment, and an observation port is built on the top of the top cover plate to provide an observation position.

[0020] S3. A connecting top plate is built at the bottom of the top cover plate, and internal support columns are connected to the bottom of the connecting top plate to support the bottom of the top cover plate. Insert heads are provided at the bottom of the internal support columns and are inserted into the inner side of several insertion slots distributed through the top of the structural base plate. Fastening frames are provided on the outer side of the insertion slots, and limiting frames are provided on the outer side of the insertion heads to facilitate the insertion of the insertion heads into the inner side of the insertion slots. Positioning slots are also distributed on the outer side of the internal support columns to fasten the fasteners to the outer side of the fastening frames. The top inner side of the fasteners is fastened to the inner side of the positioning slots and fixed by fastening bolts, so as to facilitate convenient and efficient assembly and maintain stability.

[0021] S4. A secondary filter box is connected to the top of the top cover plate via a connecting pipe. A secondary filter element is installed inside the secondary filter box. A primary filter box is connected to the top of the secondary filter box. A primary filter element is installed inside the primary filter box, which facilitates multi-stage filtration through the primary and secondary filter elements.

[0022] S5 is connected to the top of the connecting ring via a connecting cover. A buffer cover is provided on the inner side of the connecting ring. An inlet hopper is fixedly connected to the top of the connecting ring to facilitate the collection of rainwater for filtration.

[0023] S6. Abutment strips are distributed on the side of the limiting seat. The abutment strips are attached to the outside of the long side plate. Rotating sleeves are rotatably connected to both ends of the limiting seat. A rotating handle is fitted on the outside of the rotating sleeve. A threaded adjusting rod is threaded to one end of the rotating sleeve. The upper connecting seat is connected to the threaded adjusting rod and the limiting cover plate is connected. It is convenient to manually rotate the rotating handle to make the rotating sleeve and the threaded adjusting rod threadedly adjusted, so as to clamp the limiting cover plate on both sides and ensure assembly stability.

[0024] S7. By distributing several anti-slip strips on the inner side of the limiting cover plate, after the limiting cover plate is fastened to the corner position where the long side plate and the short side plate are connected, the anti-slip strips are made to fit the surface, providing a tight and stable connection and preventing slippage.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. By placing long and short side plates on all four sides, with first splicing blocks at both ends of the long side plates and second splicing blocks at both ends of the short side plates, the first and second splicing blocks are staggered and connected, and limited by limit pins. Both the long and short side plates are then inserted into the sealing grooves on the top of the base plate for a sealed connection. A sealing pouring layer is provided on the inner sides of the structural base plate, long and short side plates for further sealing. A top cover plate is installed on top for sealing, and an observation port is built on the top of the top cover plate for observation. The bottom of the plate is built with a connecting top plate, and the bottom of the connecting top plate is connected with internal support columns distributed to support the bottom of the top cover plate. The bottom of the internal support columns is provided with insert heads that are inserted into the inner side of several insert slots distributed through the top of the structural base plate. A fastening frame is provided on the outside of the insert slots, and a limit frame is provided on the outside of the insert heads to facilitate the insertion of the insert heads into the inner side of the insert slots. The outside of the internal support columns is also provided with positioning slots to fasten the fasteners to the outside of the fastening frames. The top of the inner side of the fasteners is fastened to the inside of the positioning slots and fixed with fastening bolts, so as to facilitate convenient and efficient assembly and maintain stability.

[0027] 2. A secondary filter box is connected to the top of the top cover plate via a connecting pipe. A secondary filter element is installed inside the secondary filter box. A primary filter box is connected to the top of the secondary filter box, and a primary filter element is installed inside the primary filter box. This allows for multi-stage filtration through the primary and secondary filter elements. A connecting cover is connected to the top of the connecting ring. A buffer cover is installed inside the connecting ring. An inlet hopper is fixedly connected to the top of the connecting ring to facilitate the collection of rainwater for filtration. This achieves high-efficiency filtration and allows for quick replacement of the filter elements, ensuring the filtration effect.

[0028] 3. The limiting seat has abutment strips distributed on its side. These abutment strips are attached to the outer side of the long side plate. Rotating sleeves are rotatably connected to both ends of the limiting seat, and rotating handles are fitted on the outer side of the rotating sleeves. A threaded adjusting rod is threaded to one end of the rotating sleeve. The threaded adjusting rod is connected to the connecting seat and the limiting cover plate. The rotating handle can be manually rotated to adjust the threads of the rotating sleeve and the threaded adjusting rod, which helps to clamp the limiting cover plate on both sides and ensure assembly stability. Several anti-slip strips are distributed on the inner side of the limiting cover plate. After the limiting cover plate is fastened to the corner position where the long side plate and the short side plate meet, the anti-slip strips adhere to the surface, providing a tight and stable connection and preventing slippage. This further improves the stability and safety during use after assembly. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of a prefabricated concrete rainwater collection ditch based on multi-stage filtration according to the present invention.

[0030] Figure 2 This is a three-dimensional structural diagram of a prefabricated concrete rainwater collection ditch based on multi-stage filtration, according to the present invention.

[0031] Figure 3 This is a schematic diagram of the exploded state structure of a prefabricated concrete rainwater collection ditch based on multi-stage filtration according to the present invention.

[0032] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the diagram;

[0033] Figure 5 This is a partially exploded structural diagram of a prefabricated concrete rainwater collection ditch based on multi-stage filtration according to the present invention.

[0034] Figure 6 This is an exploded structural diagram of the filtration mechanism of a prefabricated concrete rainwater collection ditch based on multi-stage filtration according to the present invention.

[0035] Figure 7 This is a schematic diagram of the internal structure of a prefabricated concrete rainwater collection ditch based on multi-stage filtration according to the present invention.

[0036] Figure 8 For the present invention Figure 7 A magnified structural diagram at point B in the diagram.

[0037] In the picture:

[0038] 1. Concrete assembly mechanism; 101. Long side plate; 102. Short side plate; 103. First splice block; 104. Second splice block; 105. Limiting pin; 106. Top cover plate; 107. Base plate; 108. Sealing groove; 109. Observation port; 110. Sealing pouring layer; 111. Connecting top plate; 112. Internal support column; 113. Insert head; 114. Limiting frame; 115. Positioning groove; 116. Fastener; 117. Fastening bolt; 118. Structural base plate; 119. Inserting groove; 120. Fastening frame; 2. Filtering mechanism; 201. Connecting pipe; 202. Secondary filter box; 203. Secondary filter element; 204. Primary filter box; 205. Primary filter element; 206. Connecting cover; 207. Buffer top cover; 208. Connecting ring; 209. Liquid inlet hopper; 3. Limiting mechanism; 301. Limiting seat; 302. Abutment strip; 303. Rotating sleeve; 304. Rotating handle; 305. Threaded adjusting rod; 306. Connecting seat; 307. Limiting cover plate; 308. Anti-slip strip. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1: As Figures 1-8 As shown, the present invention provides a technical solution: a prefabricated concrete rainwater collection ditch based on multi-stage filtration, including a concrete assembly mechanism 1, a filtration mechanism 2 provided on the top of the concrete assembly mechanism 1, and a limiting mechanism 3 symmetrically provided on the outer side of the concrete assembly mechanism 1. The concrete assembly mechanism 1 includes two long side plates 101 and a short side plate 102. Several first splicing blocks 103 are evenly distributed at both ends of the long side plate 101, and several second splicing blocks 104 are evenly distributed at both ends of the short side plate 102. The first splicing blocks 103 and the second splicing blocks 104 are staggered and spliced. A limiting pin 105 is connected through the connection between the first splicing blocks 103 and the second splicing blocks 104. A sealing pouring layer 110 is provided on the inner wall between the long side plate 101 and the short side plate 102.

[0041] The concrete assembly mechanism 1 also includes an inner support column 112. An insertion head 113 is fixedly connected to the bottom of the inner support column 112. A limit frame 114 is fixedly installed on the outer side of the insertion head 113. Several positioning grooves 115 are provided on the side of the inner support column 112. Fastening elements 116 are fastened to the inner side of the positioning grooves 115. An insertion groove 119 is connected to the bottom of the insertion head 113. A fastening frame 120 is fixedly connected to the outer side of the insertion groove 119. The fastening elements 116 are fastened to the outer side of the fastening frame 120. The top of the fastening elements 116 is provided with… A fastening bolt 117 is provided, with the bottom thread of the fastening bolt 117 being inside the bottom of the positioning groove 115. The bottom of the short side plate 102 is connected to a base plate 107, and a sealing groove 108 is provided on the top of the base plate 107. The bottoms of the short side plate 102 and the long side plate 101 are both inserted and connected to the inside of the sealing groove 108. An observation port 109 is fixedly installed on the top of the top cover plate 106. A connecting top plate 111 is fixedly connected to the top of the inner support column 112. A structural base plate 118 is installed on the bottom of the sealing pouring layer 110.

[0042] In this embodiment, during construction, the long side plate 101 and the short side plate 102 are respectively placed on the four sides. First splicing blocks 103 are provided at both ends of the long side plate 101, and second splicing blocks 104 are provided at both ends of the short side plate 102. The first splicing blocks 103 and the second splicing blocks 104 are staggered and connected, and limited by a limiting pin 105. The long side plate 101 and the short side plate 102 are both inserted and connected to the inner side of the sealing groove 108 on the top of the base plate 107 for sealing. A sealing casting layer 110 is provided on the inner side of the structural base plate 118, the long side plate 101, and the short side plate 102 for further sealing. The top cover plate 106 is installed on top for sealing, and an observation port 109 is built on the top of the top cover plate 106 to provide an observation position. A connecting top plate 111 is constructed at the bottom of the top cover plate 106, and an inner support column 112 is connected to the bottom of the connecting top plate 111 and distributed to support the bottom of the top cover plate 106. An insertion head 113 is provided at the bottom of the inner support column 112 and is inserted into the inner side of several insertion slots 119 distributed through the top of the structural base plate 118. A fastening frame 120 is provided on the outer side of the insertion slots 119, and a limiting frame 114 is provided on the outer side of the insertion head 113 to facilitate the insertion head 113 to be inserted into the inner side of the insertion slot 119. A positioning slot 115 is also distributed on the outer side of the inner support column 112 to fasten the fastener 116 to the outer side of the fastening frame 120. The top inner side of the fastener 116 is fastened to the inner side of the positioning slot 115 and fixed by fastening bolts 117, so as to facilitate convenient and efficient assembly and maintain stability.

[0043] Example 2: As Figure 1 and Figure 6As shown, the filtration mechanism 2 includes a connecting pipe 201, a top cover plate 106 installed on the top of the short side plate 102, the top cover plate 106 being located on the top of the long side plate 101, the bottom of the connecting pipe 201 being connected to the top cover plate 106, a secondary filter box 202 being fixedly connected to the top of the connecting pipe 201, a secondary filter element 203 being provided inside the secondary filter box 202, a primary filter box 204 being threadedly connected to the top of the secondary filter box 202, a primary filter element 205 being provided inside the primary filter box 204, a connecting cover 206 being threadedly connected to the top of the primary filter box 204, a connecting ring 208 being fixedly connected to the top of the connecting cover 206, a buffer top cover 207 being provided inside the connecting ring 208, and an inlet hopper 209 being fixedly connected to the top of the connecting ring 208.

[0044] In this embodiment, a connecting pipe 201 is connected to the top of the top cover plate 106. A secondary filter box 202 is connected to the top of the connecting pipe 201, and a secondary filter element 203 is provided inside the secondary filter box 202. A primary filter box 204 is connected to the top of the secondary filter box 202, and a primary filter element 205 is provided inside the primary filter box 204, facilitating multi-stage filtration through the primary filter element 205 and the secondary filter element 203 respectively. A connecting cover 206 is connected to the top of the connecting ring 208, and a buffer top cover 207 is provided inside the connecting ring 208. A liquid inlet hopper 209 is fixedly connected to the top of the connecting ring 208 to facilitate the collection of rainwater for filtration.

[0045] Example 3: As Figures 1-4 As shown, the limiting mechanism 3 includes a limiting seat 301. Several abutment strips 302 are evenly distributed on the side of the limiting seat 301. Rotating sleeves 303 are rotatably connected to both ends of the limiting seat 301. A threaded adjusting rod 305 is threadedly connected to the inner side of the rotating sleeve 303. A rotating handle 304 is provided on the outer side of the rotating sleeve 303. A connecting seat 306 is provided at one end of the threaded adjusting rod 305. A limiting cover plate 307 is fixedly connected to the side of the connecting seat 306. Several anti-slip strips 308 are evenly distributed on the inner side of the limiting cover plate 307.

[0046] In this embodiment, abutment strips 302 are distributed on the side of the limiting seat 301. The abutment strips 302 are attached to the outer side of the long side plate 101. Rotating sleeves 303 are rotatably connected to both ends of the limiting seat 301. A rotating handle 304 is sleeved on the outer side of the rotating sleeve 303. A threaded adjusting rod 305 is threaded to one end of the rotating sleeve 303. The connecting seat 306 is connected to the threaded adjusting rod 305 and the limiting cover plate 307 is connected. It is convenient to manually rotate the rotating handle 304 to make the rotating sleeve 303 and the threaded adjusting rod 305 threadedly adjusted, so that the limiting cover plate 307 can be clamped on both sides to ensure assembly stability. By distributing several anti-slip strips 308 on the inner side of the limiting cover plate 307, after the limiting cover plate 307 is fastened to the corner position where the long side plate 101 and the short side plate 102 are connected, the anti-slip strips 308 are made to fit against the surface, providing a tight and stable connection and preventing slippage.

[0047] The working principle of the entire mechanism is as follows: During construction, the long side plate 101 and the short side plate 102 are respectively placed on the four sides. A first splicing block 103 is set at both ends of the long side plate 101, and a second splicing block 104 is set at both ends of the short side plate 102. The first splicing block 103 and the second splicing block 104 are staggered and connected, and limited by the insertion of the limiting pin 105. The long side plate 101 and the short side plate 102 are both inserted and connected to the inside of the sealing groove 108 on the top of the base plate 107 for sealing connection. A sealing pouring layer 110 is set on the inside of the structural base plate 118, the long side plate 101 and the short side plate 102 for further sealing treatment. The top cover plate 106 is installed on the top for sealing treatment, and an observation port 109 is built on the top of the top cover plate 106 to provide an observation position. A connecting top plate 111 is constructed at the bottom of the top cover plate 106, and an inner support column 112 is connected to the bottom of the connecting top plate 111 and distributed to support the bottom of the top cover plate 106. An insertion head 113 is provided at the bottom of the inner support column 112 and is inserted into the inner side of several insertion slots 119 distributed through the top of the structural base plate 118. A fastening frame 120 is provided on the outer side of the insertion slots 119, and a limiting frame 114 is provided on the outer side of the insertion head 113 to facilitate the insertion head 113 to be inserted into the inner side of the insertion slot 119. A positioning slot 115 is also distributed on the outer side of the inner support column 112 to fasten the fastener 116 to the outer side of the fastening frame 120. The top inner side of the fastener 116 is fastened to the inner side of the positioning slot 115 and fixed by fastening bolts 117, so as to facilitate convenient and efficient assembly and maintain stability. A connecting pipe 201 is connected to the top of the top cover plate 106. A secondary filter box 202 is connected to the top of the connecting pipe 201. A secondary filter element 203 is installed inside the secondary filter box 202. A primary filter box 204 is connected to the top of the secondary filter box 202. A primary filter element 205 is installed inside the primary filter box 204, facilitating multi-stage filtration through the primary filter element 205 and the secondary filter element 203. A connecting cover 206 is connected to the top of the connecting ring 208. A buffer top cover 207 is installed inside the connecting ring 208. A liquid inlet hopper 209 is fixedly connected to the top of the connecting ring 208 to facilitate the collection of rainwater for filtration. Abutment strips 302 are distributed on the side of the limiting seat 301. The abutment strips 302 are attached to the outer side of the long side plate 101. Rotating sleeves 303 are rotatably connected to both ends of the limiting seat 301. A rotating handle 304 is sleeved on the outer side of the rotating sleeve 303. A threaded adjusting rod 305 is threaded to one end of the rotating sleeve 303. The connecting seat 306 is connected to the threaded adjusting rod 305 and the limiting cover plate 307 is connected. It is convenient to manually rotate the rotating handle 304 to adjust the thread of the rotating sleeve 303 and the threaded adjusting rod 305, so as to clamp the limiting cover plate 307 on both sides and ensure assembly stability.By distributing several anti-slip strips 308 on the inner side of the limiting cover plate 307, after the limiting cover plate 307 is fastened to the corner position where the long side plate 101 and the short side plate 102 are connected, the anti-slip strips 308 are made to fit against the surface, providing a tight and stable connection and preventing slippage.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage filtration based fabricated concrete stormwater collection trench comprising a concrete fabrication mechanism (1) characterized by: The concrete assembly mechanism (1) is provided with a filter mechanism (2) at the top and a limit mechanism (3) is provided symmetrically on the outside of the concrete assembly mechanism (1). The concrete assembly mechanism (1) includes two long side plates (101) and a short side plate (102). Several first splicing blocks (103) are evenly distributed at both ends of the long side plate (101), and several second splicing blocks (104) are evenly distributed at both ends of the short side plate (102). The first splicing blocks (103) and the second splicing blocks (104) are spliced ​​alternately. A limit pin (105) is connected through the connection between the first splicing block (103) and the second splicing block (104). A sealing pouring layer (110) is provided on the inner wall between the long side plate (101) and the short side plate (102). The concrete assembly mechanism (1) further includes an inner support column (112), the bottom of which is fixedly connected to an insert head (113), and a limit frame (114) is fixedly installed on the outer side of the insert head (113). Several positioning grooves (115) are provided on the side of the inner support column (112), and fasteners (116) are fastened to the inner side of each positioning groove (115). An insert groove (119) is connected to the bottom of the insert head (113), and a fastening frame (120) is fixedly connected to the outer side of the insert groove (119). The fasteners (116) are fastened to the outer side of the fastening frame (120). The fastener (116) is provided with a fastening bolt (117) at the top, and the bottom thread of the fastening bolt (117) is at the bottom of the inner side of the positioning groove (115); the filter mechanism (2) includes a connecting pipe (201), a top cover plate (106) is installed on the top of the short side plate (102), the top cover plate (106) is located on the top of the long side plate (101), the bottom of the connecting pipe (201) is connected to the top cover plate (106), a secondary filter box (202) is fixedly connected to the top of the connecting pipe (201), and a secondary filter element (203) is provided on the inner side of the secondary filter box (202); The top of the secondary filter box (202) is threadedly connected to the primary filter box (204), and the inner side of the primary filter box (204) is provided with a primary filter element (205). The top of the primary filter box (204) is threadedly connected to a connecting cover (206), and the top of the connecting cover (206) is fixedly connected to a connecting ring (208). A buffer top cover (207) is provided on the inner side of the connecting ring (208), and a liquid inlet hopper (209) is fixedly connected to the top of the connecting ring (208).

2. The multi-stage filtration based fabricated concrete stormwater collection trench of claim 1, wherein: The limiting mechanism (3) includes a limiting seat (301), and several abutment strips (302) are evenly distributed on the side of the limiting seat (301). Rotating sleeves (303) are rotatably connected to both ends of the limiting seat (301), and a threaded adjusting rod (305) is threadedly connected to the inner side of the rotating sleeve (303).

3. The multi-stage filtration based fabricated concrete stormwater collection trench of claim 2, wherein: A rotating handle (304) is provided on the outside of the rotating sleeve (303), and a connecting seat (306) is provided at one end of the threaded adjusting rod (305).

4. The multi-stage filtration based fabricated concrete stormwater collection trench of claim 3, wherein: The side of the connecting seat (306) is fixedly connected to a limiting cover plate (307), and a number of anti-slip strips (308) are evenly distributed on the inner side of the limiting cover plate (307).

5. The multi-stage filtration-based prefabricated concrete stormwater collection trench according to claim 4, characterized in that: The bottom of the short side plate (102) is connected to a base plate (107), and the top of the base plate (107) is provided with a sealing groove (108). The bottoms of the short side plate (102) and the long side plate (101) are both inserted into the inner side of the sealing groove (108). The top of the top cover plate (106) is fixedly installed with an observation port (109). The top of the inner support column (112) is fixedly connected with a connecting top plate (111). The bottom of the sealing pouring layer (110) is installed with a structural base plate (118).

6. A method of constructing a fabricated concrete stormwater collection trench based on multi-stage filtration, characterized in that, The prefabricated concrete rainwater collection ditch based on multi-stage filtration as described in claim 5 includes the following steps: S1. During construction, the long side plate (101) and the short side plate (102) are respectively placed on the four sides. The long side plate (101) is provided with a first splicing block (103) at both ends, and the short side plate (102) is provided with a second splicing block (104) at both ends. The first splicing block (103) and the second splicing block (104) are connected alternately and limited by the insertion connection of the limiting pin (105). S2. The long side plate (101) and the short side plate (102) are inserted and connected to the inside of the sealing groove (108) on the top of the base plate (107) for sealing connection. A sealing casting layer (110) is provided on the inside of the structural base plate (118), the long side plate (101) and the short side plate (102) for further sealing treatment. The top cover plate (106) is installed on the top for sealing treatment. An observation port (109) is built on the top of the top cover plate (106) to provide an observation position. S3. A connecting top plate (111) is constructed at the bottom of the top cover plate (106), and an inner support column (112) is connected to the bottom of the connecting top plate (111) and distributed to support the bottom of the top cover plate (106). An insert head (113) is provided at the bottom of the inner support column (112) and is inserted into the inner side of several insert slots (119) distributed through the top of the structural base plate (118). A fastening frame (120) is provided on the outer side of the insert slots (119). A limiting frame (114) is provided on the outside of 113) to facilitate the insertion of the insertion head (113) into the inside of the insertion slot (119). The outer side of the inner support column (112) is also provided with positioning slots (115) to fasten the fastener (116) to the outside of the fastening frame (120). The top of the inner side of the fastener (116) is fastened to the inside of the positioning slot (115) and fixed by fastening bolts (117) to facilitate convenient and efficient assembly and maintain stability. S4. A secondary filter box (202) is connected to the top of the top cover plate (106) via a connecting pipe (201). A secondary filter element (203) is provided inside the secondary filter box (202). A primary filter box (204) is connected to the top of the secondary filter box (202). A primary filter element (205) is provided inside the primary filter box (204). This facilitates multi-stage filtration through the primary filter element (205) and the secondary filter element (203). S5. The top of the connecting ring (208) is connected by the connecting cover (206). A buffer top cover (207) is provided on the inner side of the connecting ring (208). The liquid inlet (209) is fixedly connected to the top of the connecting ring (208) to facilitate the intake of rainwater for filtration. S6. Abutment strips (302) are distributed on the side of the limiting seat (301). The abutment strips (302) are attached to the outside of the long side plate (101). Rotating sleeves (303) are rotatably connected to both ends of the limiting seat (301). A rotating handle (304) is sleeved on the outside of the rotating sleeve (303). A threaded adjusting rod (305) is threaded to one end of the rotating sleeve (303). The connecting seat (306) is connected to the threaded adjusting rod (305) and the limiting cover plate (307) is connected. It is convenient to manually rotate the rotating handle (304) so ​​that the rotating sleeve (303) and the threaded adjusting rod (305) can be threadedly adjusted. It is convenient to clamp the limiting cover plate (307) on both sides to ensure assembly stability. S7. By distributing several anti-slip strips (308) on the inner side of the limiting cover plate (307), after the limiting cover plate (307) is fastened to the corner position at the connection between the long side plate (101) and the short side plate (102), the anti-slip strips (308) are attached to the surface, providing a tight and stable connection and preventing slippage.

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