Hollow light concrete cover plate

Abstract

The invention discloses a hollow light concrete cover plate, and relates to the technical field of concrete cover plates, the hollow light concrete cover plate comprises a cover plate body and a cable trench, the cover plate body is movably installed at the top of the cable trench, the bottom of the cover plate body is provided with a rectangular groove, the thickness of the rectangular groove is one third of the thickness of the cover plate body, and the cover plate body is provided with two openings. The openings penetrate through the upper wall face and the lower wall face of the cover plate body, rotating rods are movably installed at the ends, close to each other, of the interiors of the two openings correspondingly, the two rotating rods are sleeved with movable plates correspondingly, one sides of the rotating rods and the openings are inclined planes and attached to each other, sinking grooves are formed in the tops of the movable plates, and transmission grooves are formed in the middle positions in the cover plate body. And a limiting mechanism is arranged in the transmission groove. According to the cable trench cover plate, the effect of sealing the gap between the movable plate and the cover plate body can be achieved while the movable plate is conveniently opened to overhaul the interior of the cable trench, and the situation that the movable plate is clamped by external garbage and sundries and cannot be opened is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of concrete cover plates, in particular to a hollow light concrete cover plate. Background Art

[0002] Concrete covers are usually precast concrete components used to cover roads, sidewalks, drains, inspection wells or other infrastructure openings. They are designed to withstand various environmental and load conditions. Concrete covers are usually installed on the top of the cable trench to seal and protect the cable trench.

[0003] A Chinese patent with a search announcement number of CN112003228A discloses a water-proof concrete cable trench cover, including a covering plate; the covering plate is laid above the notch of the cable trench; adjacent covering plates are connected by snapping; drainage troughs are arranged on the cable trench at positions corresponding to both sides of the covering plate; a gap is left between both sides of the covering plate and the notch of the cable trench; in the invention, adjacent covering plates are connected by snapping, thereby ensuring that rainwater does not flow into the cable trench from between adjacent covering plates; at the same time, rainwater on the covering plate can flow into the drainage trough through the gap between the covering plate and the notch of the cable trench, and then the rainwater is discharged into the city's sewer system through the drainage trough, thereby ensuring that no rainwater enters the cable trench, thereby ensuring the safety of the cables in the cable trench, thereby improving the service life of the cables and the safety of the cables during power transmission.

[0004] However, the above invention has the following disadvantages:

[0005] Although the above invention ensures that no rainwater enters the cable trench, thereby ensuring the safety of the cables in the cable trench, the above invention makes the cover plate flippable in order to facilitate the inspection and maintenance of the inside of the cable trench. In the prior art, in order to ensure that the cover plate can be flipped, gaps are generated between the cover plates. However, the cover plates are generally located outside, where there is a lot of garbage and debris. Once the garbage and debris are stuck in the gap, the cover plate cannot be flipped, affecting the use and being inconvenient. Summary of the invention

[0006] The object of the present invention is to provide a hollow lightweight concrete cover plate to solve the problems raised in the above background technology.

[0007] The technical scheme of the present invention is: a hollow light concrete cover plate, comprising a cover plate body and a cable trench, the cover plate body is movably installed on the top of the cable trench, a rectangular groove is provided at the bottom of the cover plate body, the thickness of the rectangular groove is one third of the thickness of the cover plate body, two openings are provided on the cover plate body, the openings penetrate the upper and lower wall surfaces of the cover plate body, rotating rods are movably installed at the ends of the two openings close to each other, movable plates are sleeved on the two rotating rods, one side of the rotating rods and the openings are both inclined and fit each other, a sinking groove is provided on the top of the movable plate, a transmission groove is provided at the middle position of the cover plate body, and a limiting mechanism is provided inside the transmission groove;

[0008] The limiting mechanism includes a transmission block, a first limiting block, a baffle and a first return spring. The transmission block is movably installed inside the transmission groove. Two second movable grooves are provided inside the cover body at positions corresponding to the transmission block. The two first limiting blocks are movably installed inside the two second movable grooves respectively. A limiting groove is provided on a side of the movable plate corresponding to the first limiting block. One end of the first limiting block is located inside the limiting groove. A third movable groove is provided above the first limiting block inside the cover body. The baffle is movably installed inside the third movable groove. The first return spring is installed inside the third movable groove and connected to the baffle. One end of the baffle is fitted with the side wall of the movable plate.

[0009] Preferably, a rotary groove is provided on the top of the cover plate body, a rotary rod is movably installed inside the rotary groove, and the bottom of the rotary rod is fixedly connected downward to the transmission block.

[0010] Preferably, a reset block is provided at the lower part of the second movable groove, and the reset block is fixedly connected to the first limit block. A third reset spring is also installed at the lower part of the second movable groove, and the third reset spring is connected to the reset block.

[0011] Preferably, two first movable grooves are provided on the cover body, and mounting blocks are movably installed inside the two first movable grooves. A first mounting groove is provided on the inner wall of the cable trench corresponding to the position of the mounting block, and one end of the mounting block is located inside the first mounting groove.

[0012] Preferably, a fourth movable groove is provided inside the rotary rod, a second limit block is movably installed inside the fourth movable groove, and two positioning grooves are provided inside the rotary groove.

[0013] Preferably, the two positioning grooves are distributed at 90°, one end of the second limit block is located inside one of the second limit blocks, a second return spring movably connected to the second limit block is movably installed inside the fourth movable groove, and a shift block is fixedly installed on the top of the second limit block.

[0014] Preferably, a first drainage groove is fixedly installed on both sides of the interior of the cable trench, the first drainage groove corresponds to the installation position of the cover plate body and the cable trench, a second drainage groove is fixedly installed between the two first drainage grooves, the second drainage groove corresponds to the position of the gap between the two movable plates and the cover plate body, and a third drainage groove is also fixedly installed between the two first drainage grooves, the third drainage groove corresponds to the connection position between multiple cover plate bodies.

[0015] Preferably, a drainage pipe is embedded and installed on the cable trench, the top of the drainage pipe is fixedly connected to the first drainage groove, and the first drainage groove, the second drainage groove and the third drainage groove are interconnected.

[0016] Preferably, a second mounting groove is provided inside the opening, a force transmission block is movably installed inside the second mounting groove, the inclined surface of the force transmission block fits with the inclined surface of the movable plate, an extrusion block is movably installed inside the second mounting groove, and the extrusion block and the force transmission block are fixedly connected.

[0017] Preferably, a fourth return spring is also installed inside the second installation groove, and the fourth return spring is connected to the extrusion block. A pressure sensor is installed at one end of the second installation groove away from the fourth return spring, and the fourth return spring is fitted with the input end of the pressure sensor. A signal transmitting module is provided inside the cover body, and the pressure sensor is electrically connected to the signal transmitting module.

[0018] The present invention provides a hollow light concrete cover plate through improvement, which has the following improvements and advantages compared with the prior art:

[0019] First, a rectangular groove is provided at the bottom of the cover body of the present invention, and the thickness of the rectangular groove is one third of the thickness of the cover body, thereby reducing the weight of the entire cover body by one third, thereby reducing the weight of the cover while ensuring the strength of the cover.

[0020] Second, in the present invention, since the movable plate is movably installed inside the opening through the rotating rod, the movable plate can be turned inside the opening with the rotating rod as the base point through the sinking groove, thereby facilitating the maintenance of the cables inside the cable trench.

[0021] Thirdly, the present invention sets a limiting mechanism, and the first limiting block and the limiting groove can limit the movable plate. When one end of the first limiting block is located inside the limiting groove, the movable plate cannot be turned over inside the opening, and the interior of the cable trench can be sealed and protected at the same time, and one end of the baffle is in contact with the side wall of the movable plate, and under the action of the first return spring, the baffle is in contact with the movable plate, so as to seal the gap between the cover plate body and the movable plate. When the movable plate is turned over, the baffle will be squeezed by the movable plate and then move toward the inside of the third movable groove. At the same time, under the action of the first return spring, the baffle can always be in contact with the side wall of the movable plate, so that external impurities and garbage cannot enter the gap between the cover plate body and the movable plate, thereby achieving the effect of facilitating opening the movable plate to inspect the inside of the cable trench while sealing the gap between the movable plate and the cover plate body, thereby avoiding the situation where the movable plate is stuck by external garbage and cannot be opened.

[0022] Fourthly, in the present invention, the first drainage trough, the second drainage trough and the third drainage trough are interconnected, and rainwater collected by the first drainage trough, the second drainage trough and the third drainage trough can be discharged out of the cable trench through the drainage pipe, thereby preventing rainwater from affecting the cables inside the cable trench.

[0023] Fifth: In the present invention, when the movable plate is located inside the opening, the movable plate will squeeze the transmission block, so that the transmission block drives the extrusion block inside the second mounting groove to move in a direction away from the pressure sensor, thereby making the extrusion block unable to trigger the pressure sensor; when the movable plate is not inside the opening, the fourth reset spring will release elastic force to drive the fourth reset spring to move in the direction of the pressure sensor. At this time, the pressure sensor will be triggered by the compression of the fourth reset spring, and then an alarm can be issued through the signal transmission module to remind the staff, thereby achieving the effect of a safety alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0027] Figure 3 It is a cross-sectional view of the internal structure from another angle in the present invention;

[0028] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0029] Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 For the present invention Figure 2 Enlarged view of center C.

[0031] Reference numerals:

[0032] 1. Cover plate body; 2. Cable groove; 3. Opening; 4. Rotating rod; 5. Movable plate; 6. First movable groove; 7. Mounting block; 8. First mounting groove; 9. Transmission groove; 10. Transmission block; 11. Second movable groove; 12. First limit block; 13. Limit groove; 14. Third movable groove; 15. Baffle; 16. First return spring; 17. Rotating groove; 18. Rotating rod; 19. Fourth movable groove; 20. Second limit block; 21. Positioning groove; 22. Shifting block; 23. Second return spring; 24. Return block; 25. Third return spring; 26. First drainage groove; 27. Second drainage groove; 28. Third drainage groove; 29. ​​Drain pipe; 30. Sinking groove; 31. Second mounting groove; 32. Force transmission block; 33. Extrusion block; 34. Fourth return spring; 35. Pressure sensor. DETAILED DESCRIPTION

[0033] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0034] The present invention provides a hollow light concrete cover plate through improvement. The technical solution of the present invention is:

[0035] like Figures 1 to 5As shown, an embodiment of the present invention provides a hollow light concrete cover plate, including a cover plate body 1 and a cable trench 2. The cover plate body 1 is a rectangular structure. A rectangular groove is provided at the bottom of the cover plate body 1. The thickness of the rectangular groove is one third of the thickness of the cover plate body 1, thereby reducing the weight of the cover plate body 1 by one third. The cover plate body 1 is movably installed on the top of the cable trench 2. The cable trench 2 is used for laying cables. Two openings 3 are provided on the cover plate body 1. The openings 3 are rectangular grooves. The openings 3 penetrate the upper and lower wall surfaces of the cover plate body 1. The inner ends of the two openings 3 that are close to each other are both movable. A rotating rod 4 is movably installed, and the rotating rod 4 is a cylindrical structure. A movable plate 5 is sleeved on the two rotating rods 4. The movable plate 5 is a rectangular structure adapted to the opening 3. The rotating rod 4 and one side of the opening 3 are both inclined and fit each other. A sinking groove 30 is opened on the top of the movable plate 5. Since the movable plate 5 is movably installed inside the opening 3 through the rotating rod 4, the movable plate 5 can be turned over inside the opening 3 with the rotating rod 4 as the base point through the sinking groove 30, so as to facilitate the maintenance of the cables inside the cable trench 2. A transmission groove 9 is opened in the middle position inside the cover body 1, and a limiting mechanism is arranged inside the transmission groove 9;

[0036] The limiting mechanism includes a transmission block 10, a first limiting block 12, a baffle 15 and a first return spring 16. The transmission block 10 is a circular structure with two protrusions. The transmission block 10 is movably installed inside the transmission groove 9. Two second movable grooves 11 are provided inside the cover body 1 at positions corresponding to the transmission block 10. The second movable groove 11 is a groove of a rectangular structure. The first limiting block 12 is a block of a rectangular structure. The two first limiting blocks 12 are movably installed inside the two second movable grooves 11 respectively. A limiting groove 13 is provided on the side wall of the movable plate 5 corresponding to one side of the first limiting block 12. One end of the first limiting block 12 is located inside the limiting groove 13. The movable plate 5 can be limited by the first limiting block 12 and the limiting groove 13. When one end of the first limiting block 12 is located inside the limiting groove 13, the movable plate 5 cannot be flipped inside the opening 3. At this time, the interior of the cable trench 2 can be sealed and protected. A third movable groove 14 is provided above the first limit block 12 inside the cover body 1. The third movable groove 14 is a groove with a rectangular structure. The baffle 15 is a plate with a rectangular structure. The baffle 15 is movably installed inside the third movable groove 14. The first return spring 16 is installed inside the third movable groove 14 and connected to the baffle 15. One end of the baffle 15 fits with the side wall of the movable plate 5. Under the action of the first return spring 16, the baffle 15 fits with the movable plate 5, and then the gap between the cover body 1 and the movable plate 5 can be sealed. When the movable plate 5 is turned over, the baffle 15 will be squeezed by the movable plate 5 and then move toward the inside of the third movable groove 14. At the same time, under the action of the first return spring 16, the baffle 15 can always fit with the side wall of the movable plate 5, so that external impurities and garbage cannot enter the gap between the cover body 1 and the movable plate 5, thereby preventing the movable plate 5 from being unable to open.

[0037] Two first movable grooves 6 are provided on the cover body 1. The first movable grooves 6 are grooves of a rectangular structure. Mounting blocks 7 are movably installed inside the two first movable grooves 6. The mounting blocks 7 are "L"-shaped blocks. The inner wall of the cable trench 2 is provided with a first mounting groove 8 corresponding to the position of the mounting block 7. One end of the mounting block 7 is located inside the first mounting groove 8. When the cover body 1 is installed inside the cable trench 2, the cover body 1 can be placed inside the cable trench 2 first. When the first movable groove 6 and the first mounting groove 8 correspond to each other, the mounting block 7 is pushed into the first mounting groove 8. At this time, the first mounting groove 8 will limit the cover body 1 and the cable trench 2, and then support the cover body 1. Subsequently, cement can be poured in the internal gap of the first movable groove 6 to fix the mounting block 7.

[0038] A rotary groove 17 is provided at the top of the cover body 1, and the rotary groove 17 is a cylindrical groove. A rotary rod 18 is movably installed inside the rotary groove 17, and the bottom of the rotary rod 18 is fixedly connected to the transmission block 10 downwardly. A reset block 24 is provided at the lower part of the second movable groove 11, and the reset block 24 is a block of rectangular structure. The reset block 24 is fixedly connected to the first limit block 12. A third reset spring 25 is also installed at the lower part of the second movable groove 11, and the third reset spring 25 is connected to the reset block 24. When the first limit block 12 is located inside the limit groove 13, the third reset spring 25 will be in a stretched state, and the transmission block 10 can be rotated by the rotary rod 18. When the transmission block 10 rotates until the protrusion is separated from the first limit block 12, the cover body 1 loses the force of being limited by the transmission block 10, and at this time, it will move under the action of the third reset spring 25, so that one end of the first limit block 12 leaves the inside of the limit groove 13, and the movable plate 5 can be flipped inside the opening 3.

[0039] The fourth movable groove 19 is provided inside the rotary rod 18, and the fourth movable groove 19 is a groove of an "L"-shaped structure. A second limit block 20 is movably installed inside the fourth movable groove 19, and the second limit block 20 is a block of a rectangular structure. Two positioning grooves 21 are provided inside the rotary groove 17, and the positioning grooves 21 are grooves of a rectangular structure. The two positioning grooves 21 are distributed at 90 degrees. One end of the second limit block 20 is located inside one of the second limit blocks 20. A second return spring 23 movably connected to the second limit block 20 is movably installed inside the fourth movable groove 19. When the second limit block 20 is moved, the second return spring 23 is moved. When one end of the positioning block 20 is located inside the positioning groove 21, the rotary rod 18 will be limited by the second limit block 20. At this time, the rotary rod 18 cannot be rotated, and the movable plate 5 cannot be flipped open, thereby preventing children or pedestrians from flipping the movable plate 5. A shift block 22 is fixedly installed on the top of the second limit block 20. The shift block 22 is a block with a rectangular structure. The shift block 22 can push one end of the second limit block 20 inside the fourth movable groove 19, thereby making the second limit block 20 leave the inside of the positioning groove 21. At this time, the rotary rod 18 can be unlocked, and then the movable plate 5 is unlocked.

[0040] The first drainage groove 26 is fixedly installed on both sides of the interior of the cable trench 2. The first drainage groove 26 is a schematic diagram of a hollow trapezoidal structure. The first drainage groove 26 corresponds to the installation position of the cover body 1 and the cable trench 2. The first drainage groove 26 can collect rainwater left in the gap between the cover body 1 and the cable trench 2 on rainy days. A second drainage groove 27 is fixedly installed between the two first drainage grooves 26. The second drainage groove 27 corresponds to the position of the gap between the two movable plates 5 and the cover body 1. The third reset spring 25 can collect rainwater flowing down the gap between the cover body 1 and the movable plate 5. A third drainage groove is also fixedly installed between the two first drainage grooves 26. 28. The third drain groove 28 corresponds to the connection position between the multiple cover plate bodies 1. The third drain groove 28 can collect rainwater flowing down from the gaps between the multiple cover plate bodies 1. A drain pipe 29 is embedded and installed on the cable trench 2. The drain pipe 29 is an "L"-shaped pipe. The top of the drain pipe 29 is fixedly connected to the first drain groove 26. The first drain groove 26, the second drain groove 27 and the third drain groove 28 are interconnected. The rainwater collected by the first drain groove 26, the second drain groove 27 and the third drain groove 28 can be discharged from the inside of the cable trench 2 through the drain pipe 29 to avoid the rainwater affecting the cables inside the cable trench 2.

[0041] like Figure 2 and Figure 6 As shown, a second mounting groove 31 is provided inside the opening 3, and the second mounting groove 31 is a groove of a rectangular structure. A force transmission block 32 is movably installed inside the second mounting groove 31, and the force transmission block 32 is a block of a trapezoidal structure. The inclined surface of the force transmission block 32 fits with the inclined surface of the movable plate 5. An extrusion block 33 is movably installed inside the second mounting groove 31, and the extrusion block 33 is a block of a rectangular structure. The extrusion block 33 and the force transmission block 32 are fixedly connected. A fourth return spring 34 is also installed inside the second mounting groove 31, and the fourth return spring 34 is connected to the extrusion block 33. A pressure sensor 35 is installed at one end of the second mounting groove 31 away from the fourth return spring 34, and the fourth return spring 34 fits with the input end of the pressure sensor 35. The cover plate A signal transmitting module is provided inside the main body 1, and the pressure sensor 35 is electrically connected to the signal transmitting module. When the movable plate 5 is located inside the opening 3, the movable plate 5 will squeeze the force transmitting block 32, so that the force transmitting block 32 drives the squeezing block 33 inside the second mounting groove 31 to move in a direction away from the pressure sensor 35, thereby making it impossible for the squeezing block 33 to trigger the pressure sensor 35. When the movable plate 5 is not inside the opening 3, the fourth reset spring 34 will release its elastic force to drive the fourth reset spring 34 to move in the direction of the pressure sensor 35. At this time, the pressure sensor 35 will be squeezed and triggered by the fourth reset spring 34, and then an alarm can be issued through the signal transmitting module to remind the staff, thereby achieving the effect of a safety alarm.

[0042] Specific implementation steps: A rectangular groove is provided at the bottom of the cover body 1, and the thickness of the rectangular groove is one-third of the thickness of the cover body 1, thereby reducing the overall weight of the cover body 1 by one-third. Since the movable plate 5 is movably installed inside the opening 3 through the rotating rod 4, the movable plate 5 can be turned over inside the opening 3 with the rotating rod 4 as the base point through the sinking groove 30, thereby facilitating the maintenance of the cables inside the cable trench 2. The movable plate 5 can be limited by the first limiting block 12 and the limiting groove 13. When one end of the first limiting block 12 is located inside the limiting groove 13, the movable plate 5 cannot be turned over inside the opening 3, and the inside of the cable trench 2 can be sealed and protected at this time;

[0043] At the same time, one end of the baffle 15 is in contact with the side wall of the movable plate 5, and under the action of the first return spring 16, the baffle 15 is in contact with the movable plate 5, so that the gap between the cover body 1 and the movable plate 5 can be sealed. When the movable plate 5 is flipped over, the baffle 15 will be squeezed by the movable plate 5 and then move toward the inside of the third movable groove 14. At the same time, under the action of the first return spring 16, the baffle 15 can always be in contact with the side wall of the movable plate 5, so that external impurities and garbage cannot enter the gap between the cover body 1 and the movable plate 5, thereby achieving the effect of sealing the gap between the movable plate 5 and the cover body 1 while facilitating opening the movable plate 5 to inspect the inside of the cable trench 2, thereby avoiding the situation where the movable plate 5 is stuck by external garbage and cannot be opened.

[0044] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hollow light concrete cover plate, comprising a cover plate body (1) and a cable trench (2), wherein the cover plate body (1) is movably mounted on the top of the cable trench (2), and characterized in that: The bottom of the cover plate body (1) is provided with a rectangular groove, the thickness of which is one third of the thickness of the cover plate body (1), the cover plate body (1) is provided with two openings (3), the openings (3) penetrate the upper and lower wall surfaces of the cover plate body (1), the inner ends of the two openings (3) close to each other are movably mounted with rotating rods (4), the two rotating rods (4) are sleeved with movable plates (5), the rotating rods (4) and one side of the openings (3) are inclined and fit each other, the top of the movable plate (5) is provided with a sink groove (30), the inner middle position of the cover plate body (1) is provided with a transmission groove (9), and a limiting mechanism is arranged inside the transmission groove (9); The limiting mechanism comprises a transmission block (10), a first limiting block (12), a baffle (15) and a first return spring (16); the transmission block (10) is movably mounted inside the transmission groove (9); two second movable grooves (11) are provided inside the cover body (1) at positions corresponding to the transmission block (10); the two first limiting blocks (12) are movably mounted inside the two second movable grooves (11) respectively; a limiting groove (13) is provided on a side wall of the movable plate (5) corresponding to the first limiting block (12); one end of the first limiting block (12) is located inside the limiting groove (13); a third movable groove (14) is provided above the first limiting block (12) inside the cover body (1); the baffle (15) is movably mounted inside the third movable groove (14); the first return spring (16) is installed inside the third movable groove (14) and connected to the baffle (15); one end of the baffle (15) is in contact with the side wall of the movable plate (5).

2. The hollow lightweight concrete cover plate according to claim 1, characterized in that: The top of the cover plate body (1) is provided with a rotary groove (17), a rotary rod (18) is movably installed inside the rotary groove (17), and the bottom of the rotary rod (18) is fixedly connected downward to the transmission block (10).

3. The hollow lightweight concrete cover plate according to claim 1, characterized in that: A reset block (24) is arranged at the lower part of the second movable groove (11), and the reset block (24) is fixedly connected to the first limit block (12). A third reset spring (25) is also installed at the lower part of the second movable groove (11), and the third reset spring (25) is connected to the reset block (24).

4. The hollow lightweight concrete cover plate according to claim 1, characterized in that: The cover plate body (1) is provided with two first movable grooves (6), and mounting blocks (7) are movably mounted inside the two first movable grooves (6). A first mounting groove (8) is provided on the inner wall of the cable trench (2) at a position corresponding to the mounting blocks (7), and one end of the mounting block (7) is located inside the first mounting groove (8).

5. The hollow lightweight concrete cover plate according to claim 2, characterized in that: A fourth movable groove (19) is provided inside the rotary rod (18), a second limit block (20) is movably installed inside the fourth movable groove (19), and two positioning grooves (21) are provided inside the rotary groove (17).

6. The hollow lightweight concrete cover plate according to claim 5, characterized in that: The two positioning grooves (21) are arranged at an angle of 90°, one end of the second limit block (20) is located inside one of the second limit blocks (20), a second return spring (23) movably connected to the second limit block (20) is movably installed inside the fourth movable groove (19), and a shift block (22) is fixedly installed on the top of the second limit block (20).

7. The hollow lightweight concrete cover plate according to claim 1, characterized in that: First drainage grooves (26) are fixedly installed on both sides of the interior of the cable trench (2), the first drainage grooves (26) corresponding to the installation positions of the cover plate body (1) and the cable trench (2), a second drainage groove (27) is fixedly installed between the two first drainage grooves (26), the second drainage groove (27) corresponds to the position of the gap between the two movable plates (5) and the cover plate body (1), and a third drainage groove (28) is also fixedly installed between the two first drainage grooves (26), the third drainage groove (28) corresponding to the connection position between the multiple cover plate bodies (1).

8. The hollow lightweight concrete cover plate according to claim 7, characterized in that: A drainage pipe (29) is embedded in the cable trench (2), the top of the drainage pipe (29) is fixedly connected to the first drainage groove (26), and the first drainage groove (26), the second drainage groove (27) and the third drainage groove (28) are interconnected.

9. The hollow lightweight concrete cover plate according to claim 1, characterized in that: A second installation groove (31) is provided inside the opening (3), a force transmission block (32) is movably installed inside the second installation groove (31), the inclined surface of the force transmission block (32) is in contact with the inclined surface of the movable plate (5), an extrusion block (33) is movably installed inside the second installation groove (31), and the extrusion block (33) and the force transmission block (32) are fixedly connected.

10. The hollow lightweight concrete cover plate according to claim 9, characterized in that: A fourth return spring (34) is also installed inside the second installation groove (31), and the fourth return spring (34) is connected to the extrusion block (33). A pressure sensor (35) is installed at one end of the second installation groove (31) away from the fourth return spring (34), and the fourth return spring (34) is in contact with the input end of the pressure sensor (35). A signal transmitting module is arranged inside the cover body (1), and the pressure sensor (35) is electrically connected to the signal transmitting module.

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