A trench cover capable of automatically adjusting the size of the gap and a method for implementing the same

Abstract

The application discloses a ditch cover plate capable of automatically adjusting the size of gaps and an implementation method thereof, and belongs to the technical field of ditch cover plates, which comprises a drainage cover, a cross support and a side cover plate, the cross support is fixedly welded on the left side of the drainage cover, and the side cover plate is installed on the drainage cover on the right side of the cross support. The ditch cover plate can adjust the width of the whole ditch cover plate within a certain range to adapt to the width of the ditch; the relative movement of the first linkage strip and the first linkage strip makes the adjusting plate staggered, so that the size of the drainage gap of the drainage cover is adjusted; in the normal state, the adjusting plate is in the staggered state, a part of larger garbage can be effectively avoided from falling into the ditch; when the rainfall is large, the adjusting plate can be contracted together to increase the speed of drainage; the two adjacent ditch cover plates are spliced together through the positioning clamping convex and the positioning clamping groove, the flatness of the ditch cover plate laid along the whole ditch is ensured, the laying gap is reduced, the ditch cover plate is difficult to be separately disassembled after being spliced and formed, and the possibility of being disassembled by others is reduced.

Description

Technical Field

[0001] This invention relates to the field of drainage ditch cover technology, specifically to a ditch cover capable of automatically adjusting the size of the gaps and its implementation method. Background Technology

[0002] Trench covers are widely used in gardens, residential areas, schools, stadiums, and other places. Besides their waterproofing function, they are frequently stepped on by pedestrians, especially children. When the drainage channel of a trench cover is large, it can easily cause ankle sprains. Because they are used in high-traffic areas, there is generally a lot of garbage and liquid in them. If the drainage channel is large, large pieces of garbage or liquid can easily fall into it, leading to blockages over time. Conversely, if the drainage channel is small, during heavy rains, it cannot quickly drain rainwater into the drainage system, resulting in significant water accumulation on the road surface. Furthermore, during construction, deviations in the width of the ditch can cause the trench cover to not fit or fall off.

[0003] Chinese Patent Publication No. CN218990392U discloses a drainage ditch cover, belonging to the field of cover technology. It includes a mounting support plate with a water inlet adjustment unit installed on it; a support device fixedly connected to the mounting support plate; two connecting parts fixedly connected to the support device; and a double-sided support device slidably connected to the support device. The mounting support plate includes a mounting plate and a mounting ring, with the mounting ring fixedly connected to the mounting plate. The mounting plate has drainage slots to change the water inlet volume, achieving stable support and making it more flexible and convenient to use. However, it cannot adjust the drainage gap size in real time according to needs, nor can it meet the laying requirements based on actual deviations in the ditch construction. To overcome the above-mentioned technical problems, a ditch cover capable of automatically adjusting the gap size and its implementation method are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a trench cover that can automatically adjust the size of the gaps and its implementation method. The size of the drainage gaps of the trench cover can be adjusted according to different usage conditions, which can overcome errors in the construction of water ditches, facilitate laying, and solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A trench cover capable of automatically adjusting the size of the gap includes a drainage cover, a crossbar support, and a side cover. The crossbar support is fixedly welded to the left side of the drainage cover, and the side cover is installed on the drainage cover to the right of the crossbar support.

[0007] Preferably, both the crossbar support and the side cover plate are provided with M10 bottom holes, which are fixed to both sides of the ditch with expansion bolts. The inner end of the side cover plate is provided with strip-shaped slots at equal intervals, and the strip-shaped slots of the crossbar support are engaged with each of the strips of the drainage cover.

[0008] Preferably, a first pin positioning block and a second pin positioning block are provided on the right side of the drain cover, a stop strip is installed on the lower end of the side cover plate, and a first pin and a second pin are installed on the inner side of the stop strip. The first pin is movably inserted into the first pin positioning block, and the second pin is movably inserted into the second pin positioning block.

[0009] Preferably, the drainage cover has equally spaced slots running through its transverse ends. A forward adjusting plate, a reverse adjusting plate, an upper side adjusting plate, and a lower side adjusting plate are inserted through the slots. The lower ends of the forward adjusting plate and the lower side adjusting plate are in contact with the bottom surface of the slot, and the upper ends of the reverse adjusting plate and the upper side adjusting plate are in contact with the upper surface of the slot. A first linkage plate is welded to the side endpoints of the forward adjusting plate and the lower side adjusting plate, and a second linkage plate is welded to the side endpoints of the reverse adjusting plate and the upper side adjusting plate. Welding nuts are welded to both the first linkage plate and the second linkage plate.

[0010] Preferably, a first waterproof cover is installed on the left side of the drainage cover, and a first micro motor and a second micro motor are installed inside the first waterproof cover. The output ends of the first micro motor and the second micro motor are each fixedly installed with a first screw. The first screws at the output ends of the first micro motor and the second micro motor are respectively screwed onto two welding nuts welded to the first linkage plate. A second waterproof cover is installed on the right side of the drainage cover, and a third micro motor and a fourth micro motor are installed inside the second waterproof cover. The output ends of the third micro motor and the fourth micro motor are each fixedly installed with a second screw. The second screws at the output ends of the third micro motor and the fourth micro motor are respectively screwed onto two welding nuts welded to the second linkage plate.

[0011] Preferably, both the first waterproof cover and the second waterproof cover have drainage grooves at their bottoms, and the drainage holes are arranged at equal intervals at the bottoms of the first waterproof cover and the second waterproof cover.

[0012] Preferably, the outer side of the first waterproof cover is spot-welded with a positioning protrusion, and the outer side of the second waterproof cover is provided with a positioning groove, wherein the positioning protrusion and the positioning groove are adapted to each other.

[0013] According to another aspect of the present invention, a trench cover capable of automatically adjusting the size of the gap and a method thereof are provided, comprising the following steps:

[0014] S1: Weld the crossbar support to one side of the drain cover, weld the first pin and the second pin to the baffle, then fasten the side cover plate to the other side of the drain cover, and then weld the baffle to the lower side of the side cover plate.

[0015] S2: Weld the welding nuts to the first linkage plate and the second linkage plate respectively, then weld the first linkage plate to the side end of the forward adjustment plate and the lower side adjustment plate, and weld the second linkage plate to the side end of the reverse adjustment plate and the upper side adjustment plate.

[0016] S3: Assemble the first and second micro motors inside the first waterproof cover, and assemble the third and fourth micro motors inside the second waterproof cover. Then, align the first screws at the front ends of the first and second micro motors with the welding nuts on the first linkage plate, and control the first and second micro motors to run until the upper inner side of the first waterproof cover is aligned with the inner end of the outermost row of bars of the drain cover. At this point, fix the first waterproof cover to the drain cover. Similarly, align the second screws at the front ends of the third and fourth micro motors with the welding nuts on the second linkage plate, and control the third and fourth micro motors to run until the upper inner side of the second waterproof cover is aligned with the inner end of the outermost row of bars of the drain cover. At this point, fix the second waterproof cover to the drain cover. Controlling the first, second, third, and fourth micro motors to run will drive the first and second linkage plates to run in opposite directions, adjusting the gaps in the drain cover mesh.

[0017] S4: Take two identical, fully assembled trench cover plates and assemble them using the positioning protrusions and grooves. Repeat this process to complete the cascading installation of the trench cover plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, there is a gap between the first pin and the square groove of the first pin positioning block, and a gap between the second pin and the square groove of the second pin. When they are inserted, they will not wobble. Since the width of the ditch may have a certain error during construction, this setting can be used to adjust the overall width of the ditch cover plate within a certain range to match the width of the ditch. The adjustment range is the length of the insertion end of the first pin and the second pin, and its length can be produced according to actual needs.

[0020] 2. The first linkage plate of the present invention can drive the forward adjustment plate and the side lower adjustment plate to move synchronously as a whole, and the second linkage plate can drive the reverse adjustment plate and the side upper adjustment plate to move synchronously as a whole. The relative movement of the first linkage plate and the second linkage plate makes them interlocked, thereby reducing the size of the drainage groove hole of the drainage cover. Under normal conditions, they are in an interlocked state, which can effectively prevent some larger garbage from falling into the ditch. When the rainfall is heavy, they can shrink together to increase the drainage speed.

[0021] 3. The two adjacent trench cover plates of the present invention are spliced ​​together by positioning protrusions and positioning grooves to ensure the flatness of the trench cover plates of the entire ditch, reduce the laying gaps, and make it difficult to disassemble them individually after they are assembled, thus reducing the possibility of them being disassembled by others without authorization. Attached Figure Description

[0022] Figure 1 This is a top view of the overall structure of the present invention;

[0023] Figure 2 This is an isometric view of the bottom side of the present invention;

[0024] Figure 3 This is a diagram showing the first and second waterproof covers of the present invention in a concealed state.

[0025] Figure 4 This is an enlarged view of a portion of the drainage cover mechanism of the present invention;

[0026] Figure 5 This is a diagram showing the linkage state of the first and second micro motors with the first linkage plate according to the present invention;

[0027] Figure 6 This is a diagram showing the linkage state of the third and fourth micro motors of the present invention with the second linkage plate;

[0028] Figure 7 This is a diagram showing the adjacent laying state of the trench cover plate of the present invention.

[0029] In the diagram: 1. Drain cover; 101. Strip groove; 2. Crossbar support; 3. Side cover plate; 4. First pin positioning block; 5. Second pin positioning block; 6. Stop bar; 7. First pin; 8. Second pin; 9. Reverse adjustment plate; 10. Upper side adjustment plate; 11. Lower side adjustment plate; 12. First linkage bar plate; 13. Second linkage bar plate; 14. Welded nut; 15. First waterproof cover; 16. First micro motor; 17. Second micro motor; 18. First screw; 19. Second waterproof cover; 20. Third micro motor; 21. Fourth micro motor; 22. Second screw; 23. Drain groove hole; 24. Positioning card protrusion; 25. Positioning card groove; 26. Forward adjustment plate. Detailed Implementation

[0030] 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.

[0031] To address the issue that existing drainage ditch covers are mostly placed directly on the drainage ditch without a locking connection, resulting in unstable installation and vibrations when pedestrians and vehicles pass by, thus affecting the structural stability of the drainage ditch cover, please refer to [link to relevant documentation]. Figures 1-7 This embodiment provides the following technical solution:

[0032] like Figure 1 As shown, a trench cover capable of automatically adjusting the size of the gap includes a drainage cover 1, a crossbar support 2, and a side cover 3. The crossbar support 2 is fixedly welded to the left side of the drainage cover 1, and the side cover 3 is installed on the drainage cover 1 on the right side of the crossbar support 2.

[0033] As a further embodiment of the present invention, both the crossbar support 2 and the side cover plate 3 are provided with bottom holes of M10. Expansion bolts are used to fix the crossbar support 2 and the side cover plate 3 to both sides of the ditch by drilling them into the bottom holes of M10. The inner end of the side cover plate 3 is provided with strip-shaped slots at equal intervals. The strip-shaped slots of the crossbar support 2 are engaged with each of the bars of the drainage cover 1.

[0034] By adopting the above technical solution, the bottom hole for the M10 expansion bolts is reserved without affecting the overall strength. Users can choose to use it if they need to lay it more firmly. The strip-shaped slots opened at equal intervals on the inner end of the side cover plate 3 allow the side cover plate 3 to move within the drainage slot of the drainage cover 1 to adjust the width of the trench cover plate.

[0035] As a further embodiment of the present invention, a first pin positioning block 4 and a second pin positioning block 5 are provided on the right side of the drain cover 1, and a baffle 6 is installed on the lower end of the side cover plate 3. A first pin 7 and a second pin 8 are installed on the inner side of the baffle 6. The first pin 7 is movably inserted into the first pin positioning block 4, and the second pin 8 is movably inserted into the second pin positioning block 5.

[0036] like Figure 2 As shown, by adopting the above technical solution, a gap of 0.4mm is left between the first pin 7 and the square groove of the first pin positioning block 4, and a gap of 0.4mm is left between the second pin 8 and the square groove of the second pin 8. When the first pin 7 is movably inserted into the first pin positioning block 4 and the second pin 8 is movably inserted into the second pin positioning block 5, the connection between the drain cover 1 and the side cover plate 3 will not shake. Since the width of the ditch will have a certain error, this setting can adjust the overall width of the ditch cover plate within a certain range to adapt to the width of the ditch. The adjustment range is the length of the insertion end of the first pin 7 and the second pin 8, and its length can be produced according to actual needs.

[0037] As a further embodiment of the present invention, a strip groove 101 is provided at equal intervals through the transverse end of the drain cover 1. A forward adjusting plate 26, a reverse adjusting plate 9, an upper side adjusting plate 10, and a lower side adjusting plate 11 are inserted through the strip groove 101. The lower ends of the forward adjusting plate 26 and the lower side adjusting plate 11 are in contact with the bottom surface of the strip groove 101, and the upper ends of the reverse adjusting plate 9 and the upper side adjusting plate 10 are in contact with the upper end surface of the strip groove 101. A first linkage plate 12 is welded to the side end of the forward adjusting plate 26 and the lower side adjusting plate 11, and a second linkage plate 13 is welded to the side end of the reverse adjusting plate 9 and the upper side adjusting plate 10. Welding nuts 14 are welded to both the first linkage plate 12 and the second linkage plate 13.

[0038] By adopting the above technical solution, the first linkage plate 12 can drive the forward adjustment plate 26 and the side lower adjustment plate 11 to move synchronously as a whole, and the second linkage plate 13 can drive the reverse adjustment plate 9 and the side upper adjustment plate 10 to move synchronously as a whole. The welding nut 14 can drive the first linkage plate 12 and the second linkage plate 13 to reciprocate under the rotational driving action of the first screw 18 and the second screw 22.

[0039] As a further embodiment of the present invention, a first waterproof cover 15 is installed on the left side of the drainage cover 1. A first micro motor 16 and a second micro motor 17 are installed inside the first waterproof cover 15. A first screw 18 is fixedly installed at the output end of the first micro motor 16 and the second micro motor 17. The first screw 18 at the output end of the first micro motor 16 and the second micro motor 17 are respectively screwed onto two welding nuts 14 welded on the first linkage plate 12. A second waterproof cover 19 is installed on the right side of the drainage cover 1. A third micro motor 20 and a fourth micro motor 21 are installed inside the second waterproof cover 19. A second screw 22 is fixedly installed at the output end of the third micro motor 20 and the fourth micro motor 21. The second screw 22 at the output end of the third micro motor 20 and the fourth micro motor 21 are respectively screwed onto two welding nuts 14 welded on the second linkage plate 13.

[0040] like Figures 3-6 As shown, by adopting the above technical solution, the first waterproof cover 15 and the second waterproof cover 19 on both sides of the drainage cover 1 are driven by dual power. The controller controls the synchronous operation of each motor to ensure the smooth movement of the first linkage plate 12 and the second linkage plate 13.

[0041] As a further embodiment of the present invention, the bottom of the first waterproof cover 15 and the second waterproof cover 19 are both provided with drainage groove holes 23, and the drainage holes 23 are arranged at equal intervals at the bottom of the first waterproof cover 15 and the second waterproof cover 19.

[0042] like Figures 5-6As shown, by adopting the above technical solution, in order to improve the strength of the first waterproof cover 15 and the second waterproof cover 19, a folded edge is added to the inner end to abut against the bottom end of the drain cover 1. Therefore, the interior of the first waterproof cover 15 and the second waterproof cover 19 forms a U-shaped groove, which has the potential to collect water. Therefore, the drain hole 23 can be opened to quickly drain water and avoid water accumulation.

[0043] As a further embodiment of the present invention, a positioning protrusion 24 is spot-welded to the outer side of the first waterproof cover 15, and a positioning groove 25 is provided on the outer side of the second waterproof cover 19, wherein the positioning protrusion 24 is adapted to the positioning groove 25.

[0044] like Figure 7 As shown, by adopting the above technical solution, during installation, two adjacent trench covers are spliced ​​together by positioning protrusions 24 and positioning grooves 25, ensuring the flatness of the trench covers laid along the entire ditch, reducing the laying gaps, and making it difficult to disassemble them individually after they are assembled, thus reducing the possibility of them being disassembled without authorization.

[0045] To better demonstrate the assembly and gap adjustment process of a trench cover capable of automatically adjusting its gap size, this embodiment presents a trench cover capable of automatically adjusting its gap size and its implementation method, including the following steps:

[0046] Step 1: Weld the crossbar support 2 to one side of the drain cover 1, weld the first pin 7 and the second pin 8 to the baffle 6, then fasten the side cover 3 to the other side of the drain cover 1, and then weld the baffle 6 to the lower side of the side cover 3.

[0047] Step 2: Weld the welding nut 14 to the first linkage plate 12 and the second linkage plate 13 respectively. Then weld the first linkage plate 12 to the side end of the forward adjustment plate 26 and the side lower adjustment plate 11, and weld the second linkage plate 13 to the side end of the reverse adjustment plate 9 and the side upper adjustment plate 10.

[0048] Step 3: Assemble the first micro motor 16 and the second micro motor 17 inside the first waterproof cover 15, and assemble the third micro motor 20 and the fourth micro motor 21 inside the second waterproof cover 19. Then, align the first screws 18 at the front ends of the first micro motor 16 and the second micro motor 17 with the welding nuts 14 on the first linkage plate 12, and control the first micro motor 16 and the second micro motor 17 to operate until the upper inner side of the first waterproof cover 15 is aligned with the inner end of the outermost row of bars of the drain cover 1. At this point, fix the first waterproof cover 15 to the drain cover 1. Similarly, align the second screws 22 at the front ends of the third micro motor 20 and the fourth micro motor 21 with the welding nuts 14 on the second linkage plate 13. 4. Control the operation of the third micro motor 20 and the fourth micro motor 21 until the upper inner end of the second waterproof cover 19 is aligned with the inner end of the outermost row of strips of the drainage cover 1. At this point, fix and weld the second waterproof cover 19 to the drainage cover 1. Then, control the operation of the first micro motor 16, the second micro motor 17, the third micro motor 20, and the fourth micro motor 21 to drive the first linkage plate 12 and the second linkage plate 13 to move in opposite directions, adjusting the gaps of the mesh of the drainage cover 1. Since trench covers are widely used in garden facilities, residential areas, schools, stadiums, and other places, trench covers can use rainwater sensors to detect rainfall information and control the working status of each micro motor through a controller. Wireless remote control can also be set up.

[0049] The operation status of each micro motor can be remotely controlled by the management personnel at the corresponding laying location, so as to realize the synchronous adjustment of the status of all trench covers in the area, which is efficient and stable.

[0050] Step 4: Take two identical, fully assembled trench cover plates, assemble them using the positioning protrusion 24 and positioning groove 25, and then assemble the trench cover plates onto the ditch using expansion bolts. Repeat this process to complete the cascading laying of trench cover plates.

[0051] In summary, the trench cover plate and its implementation method of the present invention, which can automatically adjust the gap size, have three advantages. First, the gap between the first pin 7 and the square groove of the first pin positioning block 4, and the gap between the second pin 8 and the square groove of the second pin 8, prevents wobbling after insertion. Since the width of the ditch may have certain errors during construction, this setting allows the overall width of the trench cover plate to be adjusted within a certain range to match the width of the ditch. The adjustment range is the length of the insertion end of the first pin 7 and the second pin 8, and the length can be produced according to actual needs. Second, the first linkage plate 12 can drive the forward adjustment plate 26 and the side downward adjustment plate. The first linkage plate 11 moves synchronously as a whole, and the second linkage plate 13 can drive the reverse adjustment plate 9 and the side upper adjustment plate 10 to move synchronously as a whole. The first linkage plate 12 moves relative to each other and intersects, thereby reducing the size of the drainage groove hole of the drainage cover 1. Under normal conditions, they are in an intersecting state, which can effectively prevent some larger garbage from falling into the ditch. When the rainfall is heavy, they can shrink together to increase the drainage speed. Third: two adjacent ditch cover plates are spliced ​​together by positioning protrusions 24 and positioning grooves 25 to ensure the flatness of the ditch cover plates laid in the whole ditch, reduce the laying gaps, and make it difficult to disassemble them individually after they are assembled, reducing the possibility of being disassembled by others.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trench cover capable of automatically adjusting the size of the gap, comprising a drainage cover (1), a crossbar support (2), and a side cover (3), characterized in that: The crossbar support (2) is fixedly welded to the left side of the drain cover (1), and the side cover plate (3) is installed on the drain cover (1) on the right side of the crossbar support (2). The drainage cover (1) has strip grooves (101) that are evenly spaced through its transverse end. A forward adjusting plate (26), a reverse adjusting plate (9), an upper side adjusting plate (10), and a lower side adjusting plate (11) are inserted through the strip grooves (101). The lower ends of the forward adjusting plate (26) and the lower side adjusting plate (11) are in contact with the bottom surface of the strip grooves (101), and the upper ends of the reverse adjusting plate (9) and the upper side adjusting plate (10) are in contact with the upper surface of the strip grooves (101). A first linkage plate (12) is welded to the side end of the forward adjusting plate (26) and the lower side adjusting plate (11), and a second linkage plate (13) is welded to the side end of the reverse adjusting plate (9) and the upper side adjusting plate (10). Welding nuts (14) are welded to both the first linkage plate (12) and the second linkage plate (13). A first waterproof cover (15) is installed on the left side of the drainage cover (1). A first micro motor (16) and a second micro motor (17) are installed inside the first waterproof cover (15). A first screw (18) is fixedly installed at the output end of the first micro motor (16) and the second micro motor (17). The first screw (18) at the output end of the first micro motor (16) and the second micro motor (17) are respectively screwed onto two welding nuts (14) welded on the first linkage plate (12). A second waterproof cover (19) is installed on the right side of the drainage cover (1). A third micro motor (20) and a fourth micro motor (21) are installed inside the second waterproof cover (19). A second screw (22) is fixedly installed at the output end of the third micro motor (20) and the fourth micro motor (21). The second screw (22) at the output end of the third micro motor (20) and the fourth micro motor (21) are respectively screwed onto two welding nuts (14) welded on the second linkage plate (13). The bottom of the first waterproof cover (15) and the second waterproof cover (19) are provided with drainage grooves (23), and the drainage grooves (23) are arranged at equal intervals on the bottom of the first waterproof cover (15) and the second waterproof cover (19).

2. A trench cover capable of automatically adjusting the gap size according to claim 1, characterized in that: Both the crossbar support (2) and the side cover plate (3) are provided with M10 bottom holes, which are fixed to both sides of the ditch with expansion bolts. The inner end of the side cover plate (3) is provided with strip-shaped slots at equal intervals. The strip-shaped slots of the crossbar support (2) are engaged with each bar of the drainage cover (1).

3. A trench cover capable of automatically adjusting the gap size according to claim 1, characterized in that: The drain cover (1) is provided with a first pin positioning block (4) and a second pin positioning block (5) on the right side. A baffle (6) is installed on the lower end of the side cover plate (3). A first pin (7) and a second pin (8) are installed on the inner side of the baffle (6). The first pin (7) is movably inserted into the first pin positioning block (4), and the second pin (8) is movably inserted into the second pin positioning block (5).

4. A trench cover capable of automatically adjusting the gap size according to claim 3, characterized in that: The first waterproof cover (15) has a positioning protrusion (24) spot-welded on its outer side, and the second waterproof cover (19) has a positioning groove (25) on its outer side. The positioning protrusion (24) and the positioning groove (25) are adapted to each other.

5. A method for implementing a trench cover capable of automatically adjusting the gap size according to claim 4, characterized in that: Includes the following steps: S1: Weld the crossbar support (2) to one side of the drain cover (1), weld the first pin (7) and the second pin (8) to the baffle (6), then fasten the side cover plate (3) to the other side of the drain cover (1), and then weld the baffle (6) to the lower side of the side cover plate (3). S2: Weld the welding nut (14) to the first linkage plate (12) and the second linkage plate (13) respectively, then weld the first linkage plate (12) to the side end of the forward adjustment plate (26) and the side lower adjustment plate (11), and weld the second linkage plate (13) to the side end of the reverse adjustment plate (9) and the side upper adjustment plate (10). S3: Assemble the first micro motor (16) and the second micro motor (17) inside the first waterproof cover (15), assemble the third micro motor (20) and the fourth micro motor (21) inside the second waterproof cover (19), and then align the first screws (18) at the front ends of the first micro motor (16) and the second micro motor (17) with the welding nuts (14) on the first linkage plate (12), and control the first micro motor (16) and the second micro motor (17) to run until the upper inner end of the first waterproof cover (15) is aligned with the inner end of the outermost row of bars of the drain cover (1). At this time, fix the first waterproof cover (15) to the drain cover (1). Similarly, assemble the third micro motor (16) and the second micro motor (17) inside the second waterproof cover (19). The second screw (22) at the front end of the machine (20) and the fourth micro motor (21) are respectively aligned with the welding nut (14) on the second linkage strip (13), and the third micro motor (20) and the fourth micro motor (21) are controlled to run until the upper inner side of the second waterproof cover (19) is aligned with the inner side of the outermost row of strips of the drainage cover (1). At this time, the second waterproof cover (19) is fixedly welded to the drainage cover (1). At this time, the first micro motor (16), the second micro motor (17), the third micro motor (20) and the fourth micro motor (21) are controlled to run, which can drive the first linkage strip (12) and the second linkage strip (13) to run in opposite directions and adjust the gap of the mesh of the drainage cover (1). S4: Take two identical completed trench cover plates, assemble them by using the positioning protrusion (24) and positioning groove (25), and install the trench cover plates on the ditch by using expansion bolts. Repeat this process to complete the cascading laying of trench cover plates.

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