Prefabricated grate

Abstract

The prefabricated grate relates to the technical field of water supply and drainage and comprises a grate plate and a grate ring used for fixing the grate plate, the grate plate is provided with a plurality of water passing grooves of the same size, the upper end face of the grate plate is flush with the upper end face of the grate ring, the lower end face of the grate plate is slidably connected with an insertion rod, and the inner wall of the grate ring is provided with an insertion groove matched with the insertion rod. The lower end of the pull rod is rotationally connected with a connecting plate along the rotating axis in the horizontal direction, the end, away from the pull rod, of the connecting plate is rotationally connected with the inserting rod, and the rotating axis directions of the two ends of the connecting plate are the same and are perpendicular to the sliding direction of the inserting rod. The perforated strainer has the effect of improving the stability and vibration resistance of the whole structure of the perforated strainer.

Description

Technical Field

[0001] The present application relates to the technical field of water supply and drainage, and in particular to a prefabricated grate. Background Art

[0002] Stormwater grates are a crucial component of urban drainage systems, collecting surface rainwater and directing it into sewers. Typically made of metal, concrete, or composite materials, they feature a grid-like structure that allows rainwater to flow smoothly while preventing larger debris from entering the sewer and clogging the pipes.

[0003] For related technology, please refer to the Chinese patent announcement number CN217679574U, which discloses a reinforced rainwater grate, which includes a horizontal side grille and a vertical side grille connected thereto, at least one horizontal middle reinforcing grille is connected between the two vertical side grilles, a first vertical grille and a second vertical grille are arranged between the horizontal middle reinforcing grille and the horizontal side grille or between the two horizontal middle reinforcing grilles, and at least two first vertical grilles are arranged between two adjacent second vertical grilles; the cross-section of the second vertical grille is an inverted T-shape, and the longitudinal section of the horizontal middle reinforcing grille is also an inverted T-shape.

[0004] Regarding the aforementioned technologies, rainwater grates may experience vibration during use, especially on roads with frequent vehicle traffic. This vibration not only affects the stability of the rainwater grate but can also cause noise pollution. In extreme cases, the rainwater grate may even become loose and detach from the rainwater manhole due to vibration, or even become damaged, affecting the safety of pedestrians and vehicles. Utility Model Content

[0005] In order to improve the stability and anti-vibration ability of the overall structure of the grate, the present application provides a prefabricated grate.

[0006] The present application provides a prefabricated grate, which adopts the following technical solution:

[0007] A prefabricated grate comprises a grate plate and a grate ring for fixing the grate plate, wherein the grate plate is provided with a plurality of water troughs of the same size, the upper end surface of the grate plate is flush with the upper end surface of the grate ring, the lower end surface of the grate plate is slidably connected to a plug rod, the inner wall of the grate ring is provided with a slot adapted to the plug rod, the grate plate is penetrated by a pull rod in the vertical direction, the lower end of the pull rod is rotatably connected to a connecting plate along a horizontal rotation axis, the end of the connecting plate away from the pull rod is rotatably connected to the plug rod, and the rotation axis directions at both ends of the connecting plate are the same and perpendicular to the sliding direction of the plug rod.

[0008] By adopting the above technical solution, when it is necessary to install a grate on the road surface, the grate ring is first embedded in the reserved position, the grate ring is fixedly connected to the ground, and the grate plate is placed in the grate ring so that the upper end surface of the grate plate is flush with the upper end surface of the grate ring. Then, the upper end surface of the pull rod is pressed to rotate the connecting plate. The rotation of the connecting plate drives one end of the plug rod to slide into the slot on the inner wall of the grate ring, fixing the grate plate and the grate ring together, enhancing the stability of the connection between the grate plate and the grate ring, thereby improving the stability and vibration resistance of the overall grate structure. This design effectively reduces the noise generated by the grate due to vibration and reduces the risk of the grate loosening or damage due to vibration, thereby ensuring the safety of pedestrians and vehicles.

[0009] Optionally, the grate plate includes a water pass plate and a lower frame, the water pass plate is located above the lower frame and the two are integrally formed, the length and width of the water pass plate are both larger than the lower frame, the lower end face and four side walls of the water pass plate are all in contact with the grate ring, the four outer side walls of the lower frame are all in contact with the inner wall of the grate ring, a limit block is provided on the lower end face of the lower frame, and a limit plate is provided on the lower end face of the water pass plate, the end of the insertion rod close to the grate ring passes through the limit block and is slidably connected to the limit block, the end of the insertion rod away from the grate ring passes through the limit plate and is slidably connected to the limit plate, and the end of the connecting plate that is rotatably connected to the insertion rod is located between the limit block and the limit plate.

[0010] By adopting this technical solution, the water plate and lower frame are integrally molded, significantly enhancing the grate's structural strength, increasing its load-bearing capacity and service life. With the exception of the upper end of the water plate, which is flush with the upper end of the grate ring, the remaining outer walls of the grate plate abut against the inner wall of the grate ring, improving the tightness between the grate plate and the grate ring. Furthermore, the ingenious placement of the limit blocks and limit plates ensures the stability and accuracy of the rod during sliding, further enhancing the grate's overall stability and vibration resistance.

[0011] Optionally, the upper end of the insertion rod is rotatably connected to a handle, and the upper end surface of the grate plate is provided with an embedding groove for the handle to be embedded, and the side wall of the embedding groove is provided with a block for preventing the handle from detaching from the grate plate. When the handle is fully embedded in the grate plate, the block is located between the upper end surface of the grate plate and the handle, and the upper end surface of the grate plate is provided with a groove connected to the embedding groove, and the groove is used to pull the handle out of the embedding groove, and the block is made of elastic material.

[0012] By adopting the above technical solution, the convenient handle design and embedded groove structure make the operation of the insertion rod simple and convenient. Remove the handle from the embedded groove through the groove, pull the handle upward, drive the pull rod upward, drive the connecting plate to rotate, drive the insertion rod out of the grate ring, and then continue to pull the handle upward to remove the grate plate from the grate ring. On the contrary, when the grate plate is put back, due to the gravity of the grate plate, when the grate plate is lowered, the insertion rod is still in the retracted state. When the grate plate abuts the grate ring, press the pull rod downward to insert the insertion rod into the grate ring, and then turn the handle to place it into the embedded groove. The elastic material block can effectively prevent the handle from detaching from the grate plate due to vibration or other external forces, ensuring safety and convenience of use.

[0013] Optionally, the water pass plate includes an outer frame, a first grille and several second grilles, the outer frame, the first grille and the several second grilles are integrally formed, one end of the second grille is connected to the first grille, and the end of the second grille away from the first grille is connected to the outer frame, and the several second grilles are evenly arranged along the length direction of the first grille. The water pass trough is formed by the outer frame, the first grille and the several second grilles being interconnected. A baffle for blocking the water pass trough is provided in the water pass trough, and a displacement device for driving the baffle to move in a vertical direction is provided on the lower end surface of the baffle.

[0014] By adopting the above technical solution and the rational design of the water gutter structure, rainwater can flow smoothly and quickly into the sewer, improving drainage efficiency. At the same time, the combined use of the baffle and displacement device allows the degree of obstruction of the water gutter to be adjusted according to actual needs, which not only ensures drainage efficiency but also effectively prevents debris from entering the sewer, maintaining the smooth flow of the drainage system.

[0015] Optionally, the displacement device includes a plurality of support rods and a plurality of elastic members, both ends of the support rods are fixedly connected to the lower frame, the support rods extend along the arrangement direction of the second grille, the upper end of each support rod is fixedly connected to a plurality of elastic members corresponding to the baffles one by one, and the lower end of each baffle is fixedly connected to a plurality of elastic members, the width of the water trough gradually increases from top to bottom in a direction perpendicular to the arrangement direction of the second grille, and when the elastic members are in a natural state, the upper end surface of the baffle is flush with the upper end surface of the water plate.

[0016] By adopting the above technical solution, the support rods and elastic members in the displacement device cooperate with each other to achieve stable and flexible movement of the baffle. When water accumulates on the road, the elastic member can deform under the action of the gravity of the accumulated water, thereby driving the baffle to move downward. The width of the water trough gradually increases from top to bottom. As the baffle moves downward, the distance between it and the side wall of the water trough increases, and rainwater flows into the sewer through the gap between the two. The more water accumulates, the farther the baffle moves downward, the greater the distance between the baffle and the side wall of the water trough, and the faster the drainage speed. When the water accumulation decreases, the baffle rises again to block the water trough, preventing debris from entering the sewer, and at the same time reducing the spread of odors in the sewer.

[0017] Optionally, a plurality of limiting rods are provided at the lower end of the baffle, and one end of the limiting rod away from the baffle passes through the support rod and is slidably connected to the support rod in the vertical direction.

[0018] By adopting the above technical solution, the setting of the limit rod effectively ensures the stability and accuracy of the baffle during movement, prevents the baffle from shifting or falling off due to vibration or other external forces, and further improves the safety of the grate.

[0019] Optionally, two insertion rods are provided, and the two insertion rods are respectively located at both ends of the first grille, and the upper end surface of the limiting plate is fixedly connected to the lower end surface of the first grille.

[0020] By adopting this technical solution, two rods are placed at either end of the first grille. This layout optimizes the grate plate's fixing method, making it more stable. Furthermore, the fixed connection between the stop plate and the first grille further enhances the stability of the overall structure, improving the grate's ability to resist vibration and helping to maintain its stability and safety during long-term use.

[0021] Optionally, the lower ends of the outer side walls of both the outer frame and the lower frame body are provided with chamfers.

[0022] By adopting the above technical solution, the chamfered design makes it easier to install the grate plate into the grate ring.

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

[0024] 1. When installing a grate on the road, first embed the grate ring in the reserved position, secure the grate ring to the ground, and place the grate plate into the grate ring, aligning the upper end of the grate plate with the upper end of the grate ring. Then, press the upper end of the pull rod to rotate the connecting plate. The rotation of the connecting plate drives one end of the plug rod to slide into the slot on the inner wall of the grate ring, securing the grate plate and grate ring together. This strengthens the connection between the grate plate and the grate ring, thereby improving the stability and vibration resistance of the grate's overall structure. This design effectively reduces the noise generated by the grate due to vibration and reduces the risk of the grate loosening or damage due to vibration, thereby ensuring the safety of pedestrians and vehicles.

[0025] 2. The water plate and lower frame are integrally molded, significantly enhancing the structural strength of the grate plate, increasing its load-bearing capacity and service life. Except for the upper end of the water plate, which is flush with the upper end of the grate ring, the other outer walls of the grate plate are all in contact with the inner wall of the grate ring, improving the tightness between the grate plate and the grate ring. At the same time, the ingenious arrangement of the limit block and limit plate ensures the stability and accuracy of the inserted rod during the sliding process, thereby further improving the overall stability and anti-vibration effect of the grate.

[0026] 3. The support rods and elastic parts in the displacement device cooperate with each other to achieve stable and flexible movement of the baffle. When water accumulates on the road, the elastic parts can deform under the action of the gravity of the accumulated water, thereby driving the baffle to move downward. The width of the gutter gradually increases from top to bottom. As the baffle moves downward, the distance between it and the side wall of the gutter increases, and rainwater flows into the sewer through the gap between the two. The more water accumulates, the farther the baffle moves downward, the larger the distance between the baffle and the side wall of the gutter, and the faster the drainage speed. When the water accumulation decreases, the baffle rises again to block the gutter, preventing debris from entering the sewer and reducing the spread of odors in the sewer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a top view of the overall structure of a prefabricated grate.

[0028] Figure 2 It is a structural diagram of the grate plate.

[0029] Figure 3 It is a structural diagram of the grate ring.

[0030] Figure 4 yes Figure 1 Schematic diagram of the cross section along the A-A direction.

[0031] Figure 5 yes Figure 1 Schematic diagram of the cross section along the B-B direction.

[0032] Figure 6 yes Figure 5 Enlarged schematic diagram of part D.

[0033] Figure 7 yes Figure 1 Schematic diagram of the cross section along the C-C direction.

[0034] Explanation of the accompanying reference numerals: 1. grate plate; 11. water trough; 12. water plate; 121. outer frame; 122. first grille; 123. second grille; 13. lower frame; 14. limit block; 15. limit plate; 16. embedding groove; 17. stop block; 18. groove; 19. chamfer; 2. grate ring; 21. slot; 3. insertion rod; 31. handle; 4. pull rod; 5. connecting plate; 6. baffle; 7. displacement device; 71. support rod; 72. elastic member; 73. limit rod. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0036] The embodiment of the present application discloses a prefabricated grate.

[0037] Reference Figure 1A prefabricated grate includes a grate plate 1 and a grate ring 2. When the grate needs to be installed on the road surface, the grate ring 2 is first embedded in a reserved position, the grate ring 2 is fixedly connected to the ground, and the grate plate 1 is placed in the grate ring 2 so that the upper end surface of the grate plate 1 is flush with the upper end surface of the grate ring 2.

[0038] Reference Figure 2 and Figure 3 The grate plate 1 includes a water pass plate 12 and a lower frame 13. The lower end of the outer wall of the lower frame 13 is provided with a chamfer 19. The design of the chamfer 19 makes it easier to install the grate plate 1 into the grate ring 2, reduces the resistance during insertion, and makes the operation smoother and more labor-saving. The water pass plate 12 is located above the lower frame 13 and the two are integrally formed, which significantly enhances the structural strength of the grate plate 1 and improves its load-bearing capacity and service life. The length and width of the water pass plate 12 are both larger than the lower frame 13. The lower end face and four side walls of the water pass plate 12 are in contact with the grate ring 2, and the four outer walls of the lower frame 13 are in contact with the inner wall of the grate ring 2, which improves the tightness between the grate plate 1 and the grate ring 2.

[0039] Reference Figure 2 and Figure 3 The water-passing plate 12 includes an outer frame 121, a first grille 122 and a plurality of second grilles 123. The lower end of the outer wall of the outer frame 121 is provided with a chamfer 19. The design of the chamfer 19 makes it easier to install the grate plate 1 into the grate ring 2, reduces the resistance during insertion, and makes the operation smoother and more labor-saving. The outer frame 121, the first grille 122 and the plurality of second grilles 123 are integrally formed. One end of the second grille 123 is connected to the first grille 122, and the end of the second grille 123 away from the first grille 122 is connected to the outer frame 121. The plurality of second grilles 123 are evenly arranged along the length direction of the first grille 122. The outer frame 121, the first grille 122 and the plurality of second grilles 123 are interconnected to form a plurality of water-passing grooves 11 of the same size, so that rainwater can flow smoothly and quickly into the sewer, thereby improving drainage efficiency.

[0040] Reference Figure 4 and Figure 5 The lower end surface of the lower frame 13 is provided with an insertion rod 3 and a limit block 14. There are two insertion rods 3, which are respectively located at both ends of the first grid 122. This layout optimizes the fixing method of the grate plate 1 and makes it more stable.

[0041] Reference Figure 3 and Figure 5The inner wall of the grate ring 2 is provided with a slot 21 adapted for the insertion rod 3. A limit plate 15 is provided on the lower end surface of the first grille 122. The fixed connection between the limit plate 15 and the first grille 122 further enhances the stability of the overall structure, improves the grate's ability to resist vibration, and helps maintain its stability and safety during long-term use. The end of the insertion rod 3 close to the grate ring 2 passes through the limit block 14 and is slidably connected to the limit block 14. The end of the insertion rod 3 away from the grate ring 2 passes through the limit plate 15 and is slidably connected to the limit plate 15. The end of the connecting plate 5 that is rotatably connected to the insertion rod 3 is located between the limit block 14 and the limit plate 15. The ingenious arrangement of the limit block 14 and the limit plate 15 ensures the stability and accuracy of the insertion rod 3 during the sliding process, thereby further enhancing the overall stability and anti-vibration effect of the grate.

[0042] Reference Figure 4 and Figure 5 The grate plate 1 is provided with a pull rod 4 in the vertical direction, and the lower end of the pull rod 4 is rotatably connected to a connecting plate 5 along the horizontal rotation axis. A connecting plate 5 is arranged on each opposite side of the pull rod 4, and the end of the connecting plate 5 away from the pull rod 4 is rotatably connected to the insertion rod 3. The rotation axis directions at both ends of the connecting plate 5 are the same and perpendicular to the sliding direction of the insertion rod 3.

[0043] Reference Figure 5 and Figure 6 The upper end of the insertion rod 3 is rotatably connected to a handle 31. The upper end surface of the grate plate 1 is provided with an insertion groove 16 for the handle 31 to be inserted into. The sidewall of the insertion groove 16 is provided with a stopper 17 for preventing the handle 31 from being separated from the grate plate 1. When the handle 31 is fully inserted into the grate plate 1, the stopper 17 is located between the upper end surface of the grate plate 1 and the handle 31. The upper end surface of the grate plate 1 is provided with a groove 18 connected to the insertion groove 16. The groove 18 is used to pull the handle 31 out of the insertion groove 16. The stopper 17 is made of an elastic material. The elastic material of the stopper 17 can effectively prevent the handle 31 from being separated from the grate plate 1 due to vibration or other external forces, ensuring safety and convenience of use.

[0044] The convenient handle 31 design and the embedded groove 16 structure make the operation of the insertion rod 3 simple and convenient. The handle 31 is removed from the embedded groove 16 through the groove 18, and the handle 31 is pulled upward to drive the pull rod 4 to move upward, drive the connecting plate 5 to rotate, drive the insertion rod 3 to disengage the grate ring 2, and then continue to pull the handle 31 upward to remove the grate plate 1 from the grate ring 2. On the contrary, when the grate plate 1 is put back, due to the gravity of the grate plate 1, when the grate plate 1 is lowered, the insertion rod 3 is still in the retracted state. When the grate plate 1 abuts the grate ring 2, press the pull rod 4 downward to insert the insertion rod 3 into the grate ring 2, and then turn the handle 31 to place it into the embedded groove 16. The grate plate 1 and the grate ring 2 are fixed together, which enhances the stability of the connection between the grate plate 1 and the grate ring 2, thereby improving the stability and vibration resistance of the overall structure of the grate. This design effectively reduces the noise generated by the grate due to vibration and reduces the risk of the grate loosening or being damaged due to vibration, thereby ensuring the safety of pedestrians and vehicles.

[0045] Reference Figure 1 and Figure 7 The water channel 11 is equipped with a baffle 6 for shielding the water channel 11. A displacement mechanism 7 is located on the lower end of each baffle 6 to vertically move the baffle 6. The displacement mechanism 7 comprises several support rods 71 and several elastic members 72. The support rods 71 are fixedly connected to the lower frame 13 at both ends and extend along the direction in which the second grilles 123 are arranged. Two elastic members 72 are fixedly connected to the lower end of each baffle 6. These two elastic members 72 are located on either side of the baffle 6 along its length, providing more stable support for the baffle 6. A row of elastic members 72, arranged along the direction in which the second grilles 123 are arranged, is fixed to a single support rod 71, allowing water flowing down the baffle 6 to flow between adjacent support rods 71. The width of the water channel 11 gradually increases from top to bottom, perpendicular to the direction in which the second grilles 123 are arranged. The inner wall of the outer frame 121, where it abuts the first grilles 122, and the two sides of the second grilles 123, perpendicular to the first grilles 122, are both sloped. When the elastic member 72 is in its natural position, the upper end of the baffle 6 is flush with the upper end of the water-passing plate 12. Several stopper rods 73 are provided at the lower end of the baffle 6. The ends of the stopper rods 73, facing away from the baffle 6, extend through the support rods 71 and are vertically slidably connected to the support rods 71. The provision of the stopper rods 73 effectively ensures the stability and accuracy of the baffle 6 during movement, preventing the baffle 6 from shifting or falling due to vibration or other external forces, further improving the safety of the grate.

[0046] The support rod 71 and the elastic member 72 in the displacement device 7 cooperate with each other to achieve stable and flexible movement of the baffle 6. When the road is flooded, the elastic member 72 can be deformed when subjected to the gravity of the accumulated water, thereby driving the baffle 6 to move downward, and the width of the water channel 11 gradually increases from top to bottom. During the downward movement of the baffle 6, the distance between the baffle 6 and the side wall of the water channel 11 increases, and rainwater flows into the sewer through the gap between the two. The more water accumulates, the greater the distance the baffle 6 moves downward, the greater the distance between the baffle 6 and the side wall of the water channel 11, and the faster the drainage speed. When the accumulated water decreases, the baffle 6 rises again to block the water channel 11, preventing debris from entering the sewer, and at the same time reducing the spread of odors in the sewer.

[0047] The implementation principle of a prefabricated grate in an embodiment of the present application is as follows: when it is necessary to install a grate on a road surface, the grate ring 2 is first pre-buried in a reserved position, the grate ring 2 is fixedly connected to the ground, the grate plate 1 is placed in the grate ring 2, the upper end surface of the grate plate 1 is flush with the upper end surface of the grate ring 2, and then the upper end surface of the pull rod 4 is pressed to drive the connecting plate 5 to rotate. The connecting plate 5 rotates and drives one end of the plug rod 3 to slide into the slot 21 on the inner wall of the grate ring 2, so that the grate plate 1 and the grate ring 2 are fixed together, thereby enhancing the connection stability of the grate plate 1 and the grate ring 2, thereby improving the stability and vibration resistance of the overall structure of the grate. This design effectively reduces the noise generated by the grate due to vibration and reduces the risk of the grate loosening or damage due to vibration, thereby ensuring the safety of pedestrians and vehicles.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A prefabricated grate, comprising a grate plate (1) and a grate ring (2) for fixing the grate plate (1), wherein the grate plate (1) is provided with a plurality of water troughs (11) of the same size, characterized in that: The upper end surface of the grate plate (1) is flush with the upper end surface of the grate ring (2); the lower end surface of the grate plate (1) is slidably connected to the insertion rod (3); a slot (21) adapted to the insertion rod (3) is provided on the inner wall of the grate ring (2); a pull rod (4) is passed through the grate plate (1) in the vertical direction; the lower end of the pull rod (4) is rotatably connected to the connecting plate (5) along the horizontal rotation axis; the end of the connecting plate (5) away from the pull rod (4) is rotatably connected to the insertion rod (3); the rotation axis directions of the two ends of the connecting plate (5) are the same and perpendicular to the sliding direction of the insertion rod (3).

2. A prefabricated grate according to claim 1, characterized in that: The grate plate (1) comprises a water-passing plate (12) and a lower frame (13). The water-passing plate (12) is located above the lower frame (13) and the two are integrally formed. The length and width of the water-passing plate (12) are both larger than the lower frame (13). The lower end face and four side walls of the water-passing plate (12) are in contact with the grate ring (2). The four outer side walls of the lower frame (13) are in contact with the inner wall of the grate ring (2). A stop block is provided on the lower end face of the lower frame (13). (14), a limit plate (15) is provided on the lower end surface of the water-passing plate (12), one end of the insertion rod (3) close to the grate ring (2) passes through the limit block (14) and is slidably connected to the limit block (14), one end of the insertion rod (3) away from the grate ring (2) passes through the limit plate (15) and is slidably connected to the limit plate (15), and one end of the connecting plate (5) rotatably connected to the insertion rod (3) is located between the limit block (14) and the limit plate (15).

3. The prefabricated grate according to claim 1, characterized in that: The upper end of the insertion rod (3) is rotatably connected to a handle (31), and the upper end surface of the grate plate (1) is provided with an embedding groove (16) for embedding the handle (31), and a stopper (17) for preventing the handle (31) from being separated from the grate plate (1) is provided on the side wall of the embedding groove (16). When the handle (31) is completely embedded in the grate plate (1), the stopper (17) is located between the upper end surface of the grate plate (1) and the handle (31). The upper end surface of the grate plate (1) is provided with a groove (18) connected to the embedding groove (16), and the groove (18) is used to pull the handle (31) out of the embedding groove (16). The stopper (17) is made of elastic material.

4. A prefabricated grate according to claim 2, characterized in that: The water-passing plate (12) comprises an outer frame (121), a first grille (122) and a plurality of second grilles (123). The outer frame (121), the first grille (122) and the plurality of second grilles (123) are integrally formed. One end of the second grille (123) is connected to the first grille (122), and one end of the second grille (123) away from the first grille (122) is connected to the outer frame (121). The plurality of second grilles (123) are evenly arranged along the length direction of the first grille (122). The water-passing trough (11) is formed by the outer frame (121), the first grille (122) and the plurality of second grilles (123) being interconnected. A baffle (6) for shielding the water-passing trough (11) is provided in the water-passing trough (11). A displacement device (7) for driving the baffle (6) to move in a vertical direction is provided on the lower end surface of the baffle (6).

5. A prefabricated grate according to claim 4, characterized in that: The displacement device (7) comprises a plurality of support rods (71) and a plurality of elastic members (72). Both ends of the support rods (71) are fixedly connected to the lower frame (13). The support rods (71) extend along the arrangement direction of the second grille (123). The upper end of each support rod (71) is fixedly connected to a plurality of elastic members (72) corresponding to the baffles (6). The lower end of each baffle (6) is fixedly connected to the plurality of elastic members (72). The width of the water trough (11) gradually increases from top to bottom along a direction perpendicular to the arrangement direction of the second grille (123). When the elastic members (72) are in a natural state, the upper end surface of the baffle (6) is flush with the upper end surface of the water plate (12).

6. A prefabricated grate according to claim 5, characterized in that: A plurality of limiting rods (73) are provided at the lower end of the baffle (6), and one end of the limiting rod (73) away from the baffle (6) passes through the support rod (71) and is slidably connected to the support rod (71) in a vertical direction.

7. The prefabricated grate according to claim 4, characterized in that: Two insertion rods (3) are provided, and the two insertion rods (3) are respectively located at two ends of the first grid (122), and the upper end surface of the limiting plate (15) is fixedly connected to the lower end surface of the first grid (122).

8. The prefabricated grate according to claim 4, characterized in that: The lower ends of the outer side walls of both the outer frame (121) and the lower frame body (13) are provided with chamfers (19).

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