Composite material concrete well lid

Abstract

The invention relates to the technical field of urban infrastructures, and provides a composite material concrete well lid which comprises a gutter inlet cover and a well frame, the outer surface of the well frame is fixedly connected with a plurality of supporting plates and two positioning plates, the tops of the supporting plates are fixedly connected with springs, and the two positioning plates are fixedly connected with the gutter inlet cover. Telescopic rods are movably embedded in the inner surfaces of the multiple supporting plates correspondingly, first limiting plates are fixedly connected to the bottoms of the multiple telescopic rods correspondingly, the multiple telescopic rods are averagely divided into two groups, deceleration strips are fixedly connected to the tops of the two groups of telescopic rods correspondingly, fixing rods are fixedly connected to the centers of the bottoms of the two deceleration strips correspondingly, and first limiting plates are fixedly connected to the bottoms of the fixing rods correspondingly. According to the gutter inlet cover, the problems that the gutter inlet cover is cracked, sunken or warped at the edge and the like due to the fact that tires directly act on the gutter inlet cover are solved, the service life of the gutter inlet cover is prolonged, meanwhile, the phenomenon that wheels jolt and even are out of control when passing through the equipment is avoided, and the driving safety coefficient and the driving experience feeling are improved.

Description

Technical Field

[0001] The invention relates to the technical field of urban infrastructure, and in particular to a composite material concrete manhole cover. Background Art

[0002] A composite concrete manhole cover includes an integrated composite concrete manhole cover, and the integrated manhole cover integrates the functions of the manhole cover and the manhole cover base, improves the performance and safety of urban infrastructure, promotes the intelligent and sustainable development of urban management, and contributes to creating a safer, more efficient and environmentally friendly urban environment.

[0003] Although current technology has many advantages, the disadvantage of current technology is that composite concrete manhole covers are usually laid on the road, and the repeated rolling of locomotive tires will cause wear on the surface of the manhole covers. Long-term action may cause cracks, dents or edge lift in the manhole covers, reducing the service life of the manhole covers, such as tire jamming or blowout, and posing a risk of tripping or falling to pedestrians. At the same time, the color of the manhole cover is usually close to the color of the road surface, which makes it difficult to distinguish the manhole cover from the road surface in insufficient light or bad weather conditions, causing the locomotive to roll over some manhole covers that are not in a straight line with the ground, causing the locomotive to shake, reducing the driving experience, and even causing the vehicle to lose control, increasing driving risks. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a red date sorting device to solve the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a composite material concrete manhole cover, comprising: a rainwater inlet cover and a manhole frame, the outer surface of the manhole frame is fixedly connected with a plurality of support plates and two positioning plates, the tops of the plurality of support plates are fixedly connected with springs, the inner surfaces of the plurality of support plates are movably embedded with telescopic rods, the bottoms of the plurality of telescopic rods are fixedly connected with a limiting plate 1, the plurality of telescopic rods are evenly divided into two groups, the tops of the two groups of telescopic rods are fixedly connected with speed bumps, the bottom centers of the two speed bumps are fixedly connected with fixing rods, and the bottoms of the two fixing rods are fixedly connected with A fixing block one, the outer surfaces of the two fixing blocks one are fixedly connected with a positioning rod one, the outer surfaces of the two positioning rods one are movably sleeved with moving wheels, the outer surfaces of the two speed bumps are provided with two arrows, the bottom inner surface of the well frame is provided with a cleaning mechanism, the bottom of the rainwater inlet cover is provided with a lifting mechanism, the inner surface of the well frame is provided with a slide groove two, the inner surface of the slide groove two is provided with a rotating mechanism, the top of the well frame is provided with a notch, and the inner surface of the notch is provided with a warning mechanism, so as to avoid the tire directly acting on the rainwater inlet cover, causing cracks, depressions or edge lift on the rainwater inlet cover.

[0008] As a preferred embodiment, the warning mechanism includes a positioning rod 2, which is movably embedded in the inner surface of the groove, and a fixing plate is movably sleeved on the outer surface of the positioning rod 2, and a total reflection prism reflective film and two positioning blocks 1 are fixedly connected to the outer surface of the two positioning blocks 1, and a positioning pin 1 is fixedly connected to the outer surface of the positioning pin 1, and a transmission mechanism is arranged on the outer surface of the positioning pin 1, so as to avoid the wheel from being jolted or even out of control when passing through the device.

[0009] As a preferred embodiment, the rotating mechanism includes a slider, which is movably embedded in the inner surface of the slide groove 2, the top of the slider is fixedly connected to a rotating block, the top of the rotating block is fixedly connected to two fixed blocks 2 and a guide block, a slide groove 1 is provided on the side of the well frame close to the rotating block, and the outer surfaces of the two fixed blocks 2 are provided with special-shaped grooves, which can make the limit rod rise and fall under the drive of the fixed block 2.

[0010] As a preferred embodiment, the cleaning mechanism includes a protective net, which is fixedly connected to the inner surface of the well frame near the bottom, and a plurality of fixed columns are fixedly connected to the top of the protective net, and a plurality of bristles are fixedly connected to the outer surfaces of the plurality of fixed columns, and a plurality of filter holes are provided on the outer surface of the rainwater inlet cover, and a plurality of fixed columns are movably embedded in the inner surfaces of the plurality of filter holes, and the bristles can clean the filter holes to avoid clogging of the filter holes.

[0011] As a preferred embodiment, multiple springs are movably sleeved on the outer surfaces of multiple telescopic rods, and multiple springs are evenly divided into two groups. The two groups of springs are fixedly connected to the bottom of two speed bumps, and the springs can provide power for the reverse movement of the speed bumps.

[0012] As a preferred implementation, the two fixing rods are movably embedded in the inner surfaces of the two positioning plates, and the positioning plates can limit the movement trajectory of the fixing rods to avoid erroneous movement of the fixing rods.

[0013] As a preferred embodiment, the transmission mechanism includes a connecting plate, which is movably sleeved on the outer surface of the positioning pin one, and a positioning pin two is movably embedded on the side of the connecting plate away from the positioning pin one, and two positioning blocks two are fixedly connected to the outer surface of the positioning pin two. The connecting plate can drive the positioning pin one to move under the pulling of the positioning pin two.

[0014] As a preferred embodiment, the lifting mechanism includes two limit rods, the outer surfaces of the two limit rods are fixedly connected to the limit plate 2, and the two limit rods are movably embedded in the inner surfaces of the two special-shaped grooves. The limit plate 2 can prevent the limit rods from detaching from the special-shaped grooves during movement.

[0015] As a preferred implementation, the rotating block is movably embedded in the inner surface of the slide groove 1, and the slide groove 1 can limit the moving trajectory of the rotating block to avoid the rotating block from being misplaced during the movement.

[0016] As a preferred implementation, the two positioning blocks 2 are fixedly connected to the top of the rainwater inlet cover, and the positioning block 2 can provide support for the positioning pin 2.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are:

[0018] 1. The present invention utilizes the wheel to squeeze one of the speed bumps, indirectly causing the rotating block to drive the two fixed blocks to rotate clockwise, thereby causing the two limit rods to drive the rainwater inlet cover to move downward. During the process of the rainwater inlet cover moving to the inside of the well frame, the bristles on the multiple fixed columns can clean the impurities on the inner wall of the filter hole to avoid poor drainage of the filter hole. The fixed columns will support the wheels instead of the rainwater inlet cover. The fixed columns are sufficient and dense to support the wheels to pass over the rainwater inlet cover. Then the wheels press down on the other speed bump, indirectly causing the rotating block to drive the fixed block to rotate counterclockwise, thereby moving the rainwater inlet cover back to the initial position, thereby avoiding the tire directly acting on the rainwater inlet cover, resulting in problems such as cracks, depressions or edge lift on the rainwater inlet cover, and improving the service life of the rainwater inlet cover.

[0019] 2. The present invention utilizes the reflective effect of the total reflection prism reflective film, which can enable the driver to find the rainwater inlet cover from a long distance, avoiding the phenomenon of the wheel being bumped or even out of control when passing through the device, thereby improving the driving safety factor and driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the main structure of a composite material concrete manhole cover provided by the present invention;

[0021] Figure 2 A schematic diagram of the position structure of a limit plate of a composite material concrete manhole cover provided by the present invention;

[0022] Figure 3 A schematic diagram of the position structure of the fixing columns of a composite material concrete manhole cover provided by the present invention;

[0023] Figure 4 A schematic diagram of the position structure of a protective net of a composite material concrete manhole cover provided by the present invention;

[0024] Figure 5 A schematic diagram of the second position structure of a limit plate of a composite material concrete manhole cover provided by the present invention;

[0025] Figure 6 A schematic diagram of a partial structure of a composite material concrete manhole cover provided by the present invention;

[0026] Figure 7 A composite material concrete manhole cover provided by the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle

[0027] Figure 8 A composite material concrete manhole cover provided by the present invention Figure 4 Schematic diagram of the enlarged structure at B in the middle

[0028] Fig. 9 A composite material concrete manhole cover provided by the present invention Figure 1 Schematic diagram of the enlarged structure at point C in the middle.

[0029] Legend:

[0030] 1. Rainwater inlet cover; 2. Well frame; 3. Support plate; 4. Spring; 5. Telescopic rod; 6. Limit plate 1; 7. Speed ​​bump; 8. Fixed rod; 9. Positioning plate; 10. Fixed block 1; 11. Positioning rod 1; 12. Moving wheel; 13. Limit rod; 14. Limit plate 2; 15. Slide chute 1; 16. Rotating block; 17. Fixed block 2; 18. Special-shaped groove; 19. Protective net; 20. Fixed column; 21. Bristles; 22. Slider; 23. Guide block; 24. Notch; 25. Positioning rod 2; 26. Fixed plate; 27. Positioning block 1; 28. Positioning pin 1; 29. ​​Connecting plate; 30. Positioning pin 2; 31. Positioning block 2; 32. Filter hole; 33. Total reflection prism reflective film; 34. Slide chute 2; 35. Arrow. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-8 The present invention provides a technical solution: a composite material concrete manhole cover, comprising: a rainwater inlet cover 1 and a manhole frame 2, the outer surface of the manhole frame 2 is fixedly connected with a plurality of support plates 3 and two positioning plates 9, the tops of the plurality of support plates 3 are fixedly connected with springs 4, the inner surfaces of the plurality of support plates 3 are movably embedded with telescopic rods 5, the bottoms of the plurality of telescopic rods 5 are fixedly connected with a limiting plate 6, the plurality of telescopic rods 5 are evenly divided into two groups, the tops of the two groups of telescopic rods 5 are fixedly connected with speed bumps 7, the bottom centers of the two speed bumps 7 are fixedly connected with fixing rods 8, the bottoms of the two fixing rods 8 are fixedly connected with fixing blocks 10, and the two fixing blocks 10 are fixedly connected with each other. The outer surfaces of the two positioning rods 11 are fixedly connected, the outer surfaces of the two positioning rods 11 are movably sleeved with moving wheels 12, the outer surfaces of the two speed bumps 7 are provided with two arrows 35, the bottom inner surface of the well frame 2 is provided with a cleaning mechanism, the bottom of the rainwater inlet cover 1 is provided with a lifting mechanism, the inner surface of the well frame 2 is provided with a slide groove 24, the inner surface of the slide groove 24 is provided with a rotating mechanism, the top of the well frame 2 is provided with a notch 24, and the inner surface of the notch 24 is provided with a warning mechanism, which avoids the tire directly acting on the rainwater inlet cover 1, resulting in cracks, depressions or edge lift of the rainwater inlet cover 1, thereby improving the service life of the rainwater inlet cover 1.

[0033] like Fig. 9As shown, the warning mechanism includes a positioning rod 25, which is movably embedded in the inner surface of the groove 24, and a fixing plate 26 is movably sleeved on the outer surface of the positioning rod 25. The outer surface of the fixing plate 26 is fixedly connected with a total reflection prism reflective film 33 and two positioning blocks 27, and the outer surfaces of the two positioning blocks 27 are fixedly connected with positioning pins 28. The outer surface of the positioning pins 28 is provided with a transmission mechanism, which avoids the wheel from being bumpy or even out of control when passing through the device, thereby improving the driving safety factor and driving experience.

[0034] like Figure 1-8 As shown, the rotating mechanism includes a slider 22, which is movably embedded in the inner surface of the slide groove 24, and the top of the slider 22 is fixedly connected with a rotating block 16, and the top of the rotating block 16 is fixedly connected with two fixed blocks 217 and a guide block 23. A slide groove 15 is provided on the side of the well frame 2 close to the rotating block 16, and the outer surfaces of the two fixed blocks 217 are provided with special-shaped grooves 18. The special-shaped grooves 18 can make the limit rod 13 rise and fall under the drive of the fixed block 217, and then the rainwater inlet cover 1 is raised and lowered under the drive of the limit rod 13.

[0035] like Figure 1-8 As shown, the cleaning mechanism includes a protective net 19, which is fixedly connected to the inner surface of the well frame 2 near the bottom, and a plurality of fixed columns 20 are fixedly connected to the top of the protective net 19, and a plurality of bristles 21 are fixedly connected to the outer surfaces of the plurality of fixed columns 20. A plurality of filter holes 32 are provided on the outer surface of the rainwater inlet cover 1, and a plurality of fixed columns 20 are movably embedded in the inner surfaces of the plurality of filter holes 32. The bristles 21 can clean the filter holes 32 to avoid blockage of the filter holes 32 and cause poor drainage.

[0036] like Figure 1-4 As shown, multiple springs 4 are movably sleeved on the outer surfaces of multiple telescopic rods 5, and the multiple springs 4 are evenly divided into two groups. The two groups of springs 4 are fixedly connected to the bottom of two speed bumps 7. The springs 4 can provide power for the reverse movement of the speed bumps 7, so that the speed bumps 7 move in the reverse direction.

[0037] like Figure 7 As shown, two fixing rods 8 are movably embedded in the inner surfaces of two positioning plates 9. The positioning plates 9 can limit the movement trajectory of the fixing rods 8 to avoid erroneous movement of the fixing rods 8 and cause equipment failure.

[0038] like Fig. 9 As shown, the transmission mechanism includes a connecting plate 29, which is movably sleeved on the outer surface of the positioning pin 28, and a positioning pin 30 is movably embedded on the side of the connecting plate 29 away from the positioning pin 28. The outer surface of the positioning pin 30 is fixedly connected to two positioning blocks 31. The connecting plate 29 can drive the positioning pin 28 to move under the pull of the positioning pin 30, and then the positioning pin 28 drives the fixed plate 26 to rotate through the positioning block 27.

[0039] like Figure 5 As shown, the lifting mechanism includes two limit rods 13, the outer surfaces of the two limit rods 13 are fixedly connected to the limit plate 14, and the two limit rods 13 are movably embedded in the inner surfaces of the two special-shaped grooves 18. The limit plate 14 can prevent the limit rods 13 from being separated from the special-shaped grooves 18 during movement, causing the equipment to be unable to be used normally.

[0040] like Figure 1 and Figure 2 As shown, the rotating block 16 is movably embedded in the inner surface of the slide groove 15, and the slide groove 15 can limit the moving track of the rotating block 16 to prevent the rotating block 16 from being misplaced during the movement and affecting the use of the equipment.

[0041] like Fig. 9 As shown, two positioning blocks 31 are fixedly connected to the top of the rainwater inlet cover 1 , and the positioning blocks 31 can provide support for the positioning pins 30 , providing a good working environment for the positioning pins 30 .

[0042] Working principle: This equipment is a composite material concrete manhole cover. When in use, the manhole cover is installed in the direction indicated by the arrow 35, and the direction indicated by the arrow 35 is the direction of traffic. When the wheels of the locomotive pass through one of the speed bumps 7, it will squeeze one of the speed bumps 7, so that one of the speed bumps 7 drives two of the telescopic rods 5 and one of the fixed rods 8 to move downward, and squeeze the springs 4 on two of the support plates 3, so that two of the springs 4 obtain elastic potential energy, and the limit plate 6 can limit the moving trajectory of the telescopic rod 5, and one of the fixed rods 8 will move downward with one of the speed bumps 7, so that one of the fixed blocks 10 drives one of the moving wheels 12 to move downward through one of the positioning rods 11, so that one of the moving wheels 12 squeezes one of the guide blocks 23. Due to the special shape of the guide block 23, one of the guide blocks 23 drives the rotating block 16 to rotate inside the slide groove 15 on the well frame 2. The positioning plate 9 can limit the moving trajectory of the fixed rod 8. At this time, the rotating block 16 drives the slider 22 to rotate clockwise in the slide groove 2 34 on the well frame 2, so that the other guide block 23 also rotates with the rotating block 16, and the highest point on the other guide block 23 moves to the bottom of the other moving wheel 12. At the same time, the two fixed blocks 2 17 also rotate clockwise with the rotating block 16, and then the two limit rods 13 move downward under the restriction of the two special-shaped grooves 18, and then the two limit rods 13 drive the rainwater inlet cover 1 moves downward, the limiting plate 2 14 can limit the moving track of the limiting rod 13. When the rainwater inlet cover 1 moves downward, the multiple fixing columns 20 on the protective net 19 will extend into the filter holes 32 on the rainwater inlet cover 1 to clean the filter holes 32 to prevent the filter holes 32 from being blocked by impurities, resulting in poor drainage. The heights of the multiple fixing columns 20 are on the same horizontal plane as the well frame 2. At the same time, the fixing columns 20 are sufficient and the pressure on the tires is small, so the tires will not be damaged. Therefore, when the wheel passes through one of the speed bumps 7, it will only move on the top of the multiple fixing columns 20. At this time, the rainwater inlet cover 1 has shrunk into the inside of the well frame 2, thereby avoiding the wheel from rolling over the rainwater inlet cover 1, thereby improving the service life of the rainwater inlet cover 1. When the wheel leaves one of the speed bumps 7, the wheel will not roll over the rainwater inlet cover 1. When the wheel moves onto the other speed bump 7, the other speed bump 7 indirectly moves the other moving wheel 12 downward, and then the other moving wheel 12 squeezes the other guide block 23, so that the other guide block 23 drives the rotating block 16 to rotate counterclockwise, and then the two fixed blocks 17 drive the two limit rods 13 to move upward through the two special-shaped grooves 18, and then the two limit rods 13 move the rainwater inlet cover 1 upward and move the rainwater inlet cover 1 back to the initial position. The diameter of the device is 50 mm, and the front wheel and the rear wheel will not squeeze the two speed bumps 7 at the same time, causing damage to the equipment.

[0043] When the rainwater inlet cover 1 moves down, the two positioning blocks 2 31 will drive the positioning pin 2 30 to move down, so that the positioning pin 2 30 pulls the positioning pin 1 28 to move through the connecting plate 29, and the positioning pin 1 28 drives the fixing plate 26 to make a circular arc motion with the positioning rod 25 in the notch 24 as the center through the two positioning blocks 1 27, so that the fixing plate 26 is embedded in the notch 24. When the rainwater inlet cover 1 moves up, the rainwater inlet cover 1 drives the positioning pin 2 30 to move upward through the positioning block 2 31, so that the connecting plate 29 indirectly drives the fixing plate 26 to move out of the notch 24. The total reflection prismatic reflective film 33 has a very high reflective performance and can reflect the light of the car lights back to the direction of the light source, so that the rainwater inlet cover 1 is also very conspicuous at night or under low visibility conditions. The driver can identify the position of the rainwater inlet cover 1 from a distance to avoid accidents caused by failure to find the rainwater inlet cover 1 in time, and the total reflection prismatic reflective film 33 will not cause excessive reflection or glare to the driver.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A composite material concrete manhole cover, comprising: A rainwater inlet cover (1) and a well frame (2), characterized in that: the outer surface of the well frame (2) is fixedly connected with a plurality of support plates (3) and two positioning plates (9), the tops of the plurality of support plates (3) are fixedly connected with springs (4), the inner surfaces of the plurality of support plates (3) are movably embedded with telescopic rods (5), the bottoms of the plurality of telescopic rods (5) are fixedly connected with a limiting plate (6), the plurality of telescopic rods (5) are evenly divided into two groups, the tops of the two groups of telescopic rods (5) are fixedly connected with speed bumps (7), the bottom centers of the two speed bumps (7) are fixedly connected with fixed rods (8), and the bottoms of the two fixed rods (8) are fixedly connected with A fixing block (10) is connected, the outer surfaces of the two fixing blocks (10) are fixedly connected to positioning rods (11), the outer surfaces of the two positioning rods (11) are movably sleeved with moving wheels (12), the outer surfaces of the two speed bumps (7) are provided with two arrows (35), the bottom inner surface of the well frame (2) is provided with a cleaning mechanism, the bottom of the rainwater inlet cover (1) is provided with a lifting mechanism, the inner surface of the well frame (2) is provided with a sliding groove (34), the inner surface of the sliding groove (34) is provided with a rotating mechanism, the top of the well frame (2) is provided with a notch (24), and the inner surface of the notch (24) is provided with a warning mechanism.

2. A composite material concrete manhole cover according to claim 1, characterized in that: The warning mechanism comprises a second positioning rod (25), the second positioning rod (25) being movably embedded in the inner surface of the notch (24), the outer surface of the second positioning rod (25) being movably sleeved with a fixing plate (26), the outer surface of the fixing plate (26) being fixedly connected with a total reflection prism reflective film (33) and two first positioning blocks (27), the outer surfaces of the two first positioning blocks (27) being fixedly connected with a first positioning pin (28), and the outer surface of the first positioning pin (28) being provided with a transmission mechanism.

3. The composite material concrete manhole cover according to claim 1, characterized in that: The rotating mechanism comprises a slider (22), the slider (22) being movably embedded in the inner surface of the second slide groove (34), the top of the slider (22) being fixedly connected with a rotating block (16), the top of the rotating block (16) being fixedly connected with two second fixed blocks (17) and a guide block (23), a slide groove (15) being provided on one side of the well frame (2) close to the rotating block (16), and the outer surfaces of the two second fixed blocks (17) being provided with special-shaped grooves (18).

4. The composite material concrete manhole cover according to claim 1, characterized in that: The cleaning mechanism comprises a protective net (19), the protective net (19) is fixedly connected to the inner surface of the well frame (2) near the bottom, a plurality of fixed columns (20) are fixedly connected to the top of the protective net (19), the outer surfaces of the plurality of fixed columns (20) are fixedly connected to a plurality of bristles (21), the outer surface of the rainwater inlet cover (1) is provided with a plurality of filtering holes (32), and the plurality of fixed columns (20) are movably embedded in the inner surfaces of the plurality of filtering holes (32).

5. The composite material concrete manhole cover according to claim 1, characterized in that: The plurality of springs (4) are movably sleeved on the outer surfaces of the plurality of telescopic rods (5), the plurality of springs (4) are evenly divided into two groups, and the two groups of springs (4) are fixedly connected to the bottoms of the two speed bumps (7).

6. The composite material concrete manhole cover according to claim 1, characterized in that: The two fixing rods (8) are movably embedded in the inner surfaces of the two positioning plates (9).

7. The composite material concrete manhole cover according to claim 2, characterized in that: The transmission mechanism comprises a connecting plate (29), wherein the connecting plate (29) is movably sleeved on the outer surface of the positioning pin 1 (28), a positioning pin 2 (30) is movably embedded on the side of the connecting plate (29) away from the positioning pin 1 (28), and the outer surface of the positioning pin 2 (30) is fixedly connected to two positioning blocks 2 (31).

8. The composite material concrete manhole cover according to claim 3, characterized in that: The lifting mechanism comprises two limiting rods (13), the outer surfaces of the two limiting rods (13) are fixedly connected to the second limiting plate (14), and the two limiting rods (13) are movably embedded in the inner surfaces of the two special-shaped grooves (18).

9. The composite material concrete manhole cover according to claim 3, characterized in that: The rotating block (16) is movably embedded in the inner surface of the sliding groove (15).

10. The composite material concrete manhole cover according to claim 7, characterized in that: The two positioning blocks (31) are fixedly connected to the top of the rainwater inlet cover (1).

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