A manhole cover with a fall arrest grating and a hinged locking mechanism

Abstract

The application relates to an inspection well cover with an anti-falling grating and a hinged locking mechanism, and relates to the technical field of inspection well covers, which comprises a mounting frame body, a well cover body arranged above the mounting frame body, a grating plate arranged in the mounting frame body, and a fixed block fixedly connected to the outer surface of the well cover body. The grating plate, the fixed shaft, the spring, the limiting pin and other components are arranged, the grating plate is arranged below the well cover body by arranging the grating plate in the mounting frame body, the falling of people or objects after the well cover body is opened can be prevented, falling accidents can be effectively prevented, the spring is arranged to tightly press the sliding plate, the limiting pin can enter the corresponding limiting hole, the fixed shaft is locked, the well cover body can be prevented from being accidentally opened or closed, when the well cover body needs to be opened, the limiting pin is separated from the limiting hole by pressing the pressing plate and the guide rod, the well cover body can be operated, and the safety during use of the device can be improved.

Description

Technical Field

[0001] This application relates to the field of manhole cover technology, and in particular to a manhole cover with an anti-fall grating and a hinged locking mechanism. Background Technology

[0002] A safety manhole cover is a facility designed to cover manholes under urban roads or sidewalks. Manholes are typically used for the maintenance and inspection of water supply pipes, sewage pipes, cables, or other public utilities. The main function of a safety manhole cover is to ensure the safety of pedestrians and vehicles while allowing workers convenient access to the facilities below.

[0003] However, existing technology has revealed that when manhole covers are in use, the manhole opening is completely exposed when operators open them for inspection, posing a risk of pedestrians or objects falling in. Furthermore, the lack of a locking mechanism in the manhole covers leads to accidental opening or closing, resulting in low safety. Utility Model Content

[0004] The purpose of this application is to provide a manhole cover with an anti-fall grating and a hinged locking mechanism. The grating prevents people or objects from falling after the manhole cover is opened, effectively preventing fall accidents. The locking mechanism prevents the manhole cover from being opened or closed accidentally. The coordinated operation of the grating and the locking mechanism improves safety during use and solves the problems mentioned in the background art.

[0005] This application provides a manhole cover with an anti-fall grating and a hinged locking mechanism, employing the following technical solution: It includes a mounting frame, a manhole cover body on top of the mounting frame, a grating plate inside the mounting frame, a fixing block fixedly connected to the outer surface of the manhole cover body, a fixing shaft fixedly connected to the inner wall of the fixing block, and equidistantly arranged limiting holes on the outer surface of the fixing shaft. The mounting frame has a cavity inside, a sliding plate slidably connected to the inner wall of the cavity, two springs fixedly connected to the bottom surface of the sliding plate, the bottom end of each spring fixedly connected to the inner bottom wall of the cavity, two limiting pins fixedly connected to the upper surface of the sliding plate, the outer surface of each limiting pin slidably connected to the inner wall of the mounting frame, and each limiting pin matching a corresponding limiting hole. Two guide rods are fixedly connected to the upper surface of the sliding plate, the outer surface of each guide rod slidably connected to the inner wall of the mounting frame, and a pressing plate is provided above the sliding plate, the top end of each guide rod fixedly connected to the bottom surface of the pressing plate.

[0006] By adopting the above technical solution, a manhole cover body is installed above the mounting frame, and a grating plate is installed inside the mounting frame, positioned below the manhole cover body. This grating plate prevents people or objects from falling after the manhole cover body is opened, effectively preventing fall accidents. A fixing block is installed on the outer surface of the manhole cover body, and a fixing shaft is installed on the inner wall of the fixing block. The fixing shaft is connected to the inner wall of the mounting frame to limit its movement, allowing the manhole cover body to flip at the position of the fixing shaft. Two sets of corresponding limiting holes are opened on the surface of the fixing shaft to achieve positioning of the limiting holes. A cavity is opened inside the mounting frame, and a sliding plate is installed in the cavity. The inner wall is designed with a sliding connection to limit the sliding plate. A spring is installed on the bottom surface of the sliding plate, and the other end of the spring is fixed to the cavity, so that the spring can press the sliding plate tightly. A limit pin is set on the upper surface of the sliding plate, and the limit pin can be matched with the limit hole. A guide rod and a pressing plate are installed on the upper surface of the sliding plate. When the operator needs to open or close the manhole cover body, press the pressing plate and the guide rod, so that the sliding plate and the limit pin descend, releasing the connection between the limit pin and the limit hole, and the manhole cover body can be opened or closed. Under the action of the spring, the limit pin can automatically fall into the interior of the limit hole, achieving a self-locking effect and preventing the manhole cover body from being opened or closed accidentally.

[0007] Preferably, the inner bottom wall of the cavity is fixedly connected to two limiting posts, and the outer surface of each limiting post is slidably connected to the inner wall of the slide plate.

[0008] By adopting the above technical solution, the limiting post is installed on the inner bottom wall of the cavity and set as a fixed connection to fix the limiting post. The limiting post is connected to the slide plate and set as a sliding connection, which can improve the stability of the slide plate when lifting and lowering.

[0009] Preferably, the upper surface of the mounting frame is provided with a receiving groove, and the inner wall of the receiving groove is slidably connected to the outer surface of the pressing plate.

[0010] By adopting the above technical solution, the receiving groove is opened on the upper surface of the mounting frame to achieve the positioning of the receiving groove. The inner wall of the receiving groove is connected to the pressing plate and set as a sliding connection to achieve the limiting of the pressing plate and to hide the pressing plate to prevent the pressing plate from protruding on the outside and being run over by pedestrians or vehicles.

[0011] Preferably, the outer surface of the grating plate is fixedly connected with sliders arranged at equal intervals, the inner wall of each slider is threaded with a fixing bolt, the outer surface of each fixing bolt is threaded to the inner wall of the mounting frame, and the bottom surface of the mounting frame is fixedly connected with a well body.

[0012] By adopting the above technical solution, the slider is installed on the outer surface of the grating plate and set as a fixed connection to realize the installation of the slider. The fixing bolt is set on the inner wall of the slider and set as a threaded connection so that the fixing bolt can be installed on the inner wall of the slider. The fixing bolt and the mounting frame are also set as a threaded connection so that the slider can be fixed to the upper surface of the mounting frame by the fixing bolt, thereby allowing the grating plate to be fixed inside the mounting frame.

[0013] Preferably, the upper surface of the mounting frame is provided with equally spaced sliding grooves, and each sliding groove is slidably connected to the outer surface of the corresponding slider.

[0014] By adopting the above technical solution, the slide groove is opened on the upper surface of the mounting frame. Each slide groove has two inclined surfaces. The slider is adapted to the slide groove so that the slide groove can limit the slider. Through the inclined surfaces on both sides of the slide groove, the slider can be automatically guided into the interior of the slide groove during installation, so as to realize the positioning and installation of the slider.

[0015] Preferably, a connecting pipe is fixedly connected to the inner wall of the manhole cover body, and the inner wall of the connecting pipe is provided with internal threads.

[0016] By adopting the above technical solution, the connecting pipe is installed on the inner wall of the manhole cover body and set as a fixed connection. The connecting pipe facilitates air circulation, and the internal thread is opened on the inner wall of the connecting pipe to achieve positioning of the internal thread.

[0017] Preferably, a collection cylinder is provided below the connecting pipe, and a filter screen is fixedly connected to the inner wall of the collection cylinder.

[0018] By adopting the above technical solution, the collection cylinder is placed below the connecting pipe, and a filter screen is installed on the inner wall of the collection cylinder. The filter screen can block external debris such as cigarette butts and prevent them from falling below.

[0019] Preferably, the outer surface of the collecting cylinder is provided with an external thread, which is threaded in conjunction with an internal thread.

[0020] By adopting the above technical solution, an external thread is opened on the outer surface of the collection cylinder, and the external thread is matched with the internal thread. Through the connection of the external thread and the internal thread, the collection cylinder can be fixed below the connecting pipe, so that the debris stored inside the collection cylinder can be removed by disassembling the collection cylinder.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] This manhole cover features an anti-fall grating and a hinged locking mechanism. Components include a grating plate, a fixed shaft, a spring, and a limit pin. The grating plate, positioned below the main body of the cover, prevents people or objects from falling when the cover is opened, effectively preventing accidents. A spring-loaded sliding plate engages with the limit pin, locking the fixed shaft and preventing accidental opening or closing. To open, pressing the pressure plate and guide rod disengages the limit pin, allowing operation of the cover. This enhances safety. A connecting pipe with internal and external threads allows a collection cylinder to be installed at the bottom, facilitating the installation of a filter. The collection cylinder and filter trap and collect cigarette butts and other debris. For cleaning, simply open the cover, rotate the collection cylinder, and remove it for cleaning. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the entire application in three dimensions;

[0024] Figure 2 This is a schematic diagram of the overall front view of this application;

[0025] Figure 3 This is a structural schematic diagram of the main sectional view of this application;

[0026] Figure 4 This is a structural diagram illustrating the connection relationship between the slider and the fixing bolt in this application;

[0027] Figure 5 This is a schematic diagram of the structure of a partial explosion in this application;

[0028] Figure 6 This is a structural diagram illustrating the connection relationship between the external and internal threads in this application.

[0029] In the picture:

[0030] 1. Installation frame; 2. Manhole cover body; 3. Grating plate; 4. Fixing block; 5. Fixing shaft; 6. Limiting hole; 7. Cavity; 8. Slide plate; 9. Spring; 10. Limiting pin; 11. Guide rod; 12. Pressing plate; 13. Limiting post; 14. Receiving groove; 15. Sliding block; 16. Fixing bolt; 17. Slide groove; 18. Manhole body; 19. Connecting pipe; 20. Internal thread; 21. Collection cylinder; 22. External thread; 23. Filter screen. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0032] Example 1: A manhole cover with a fall-prevention grille and a hinged locking mechanism, please refer to... Figure 3 , Figure 4 and Figure 6 The system includes an installation frame 1, a manhole cover body 2 on top of the installation frame 1, and a grating plate 3 inside the installation frame 1. The manhole cover body 2 is positioned above the installation frame 1, and the grating plate 3 is positioned inside the installation frame 1, with the grating plate 3 located below the manhole cover body 2. This grating plate 3 can prevent people or objects from falling after the manhole cover body 2 is opened, effectively preventing falls. A fixing block 4 is fixedly connected to the outer surface of the manhole cover body 2, and a fixing shaft 5 is fixedly connected to the inner wall of the fixing block 4. The fixing block 4 is installed on the outer surface of the manhole cover body 2, and the fixing shaft 5 is installed on the inner wall of the fixing block 4. The fixing shaft 5 is connected to the inner wall of the installation frame 1 to limit the movement of the fixing shaft 5, allowing the manhole cover body 2 to flip at the position of the fixing shaft 5. The outer surface of the fixing shaft 5 has equidistantly arranged limiting holes 6, and two sets of corresponding limiting holes 6 are opened on the surface of the fixing shaft 5 to achieve positioning of the limiting holes 6.

[0033] Please see Figure 3 , Figure 4 and Figure 5 The mounting frame 1 has an internal cavity 7. A sliding plate 8 is slidably connected to the inner wall of the cavity 7. The cavity 7 and the sliding plate 8 are mounted on the inner wall of the cavity 7 in a sliding connection to limit the movement of the sliding plate 8. Two springs 9 are fixedly connected to the bottom surface of the sliding plate 8. The bottom end of each spring 9 is fixedly connected to the inner bottom wall of the cavity 7. The springs 9 are mounted on the bottom surface of the sliding plate 8, and the other end of each spring 9 is fixed to the cavity 7, allowing the springs 9 to press the sliding plate 8 firmly. Two limiting pins 10 are fixedly connected to the upper surface of the sliding plate 8. The outer surface of each limiting pin 10 is slidably connected to the inner wall of the mounting frame 1. Each limiting pin 10 is adapted to a corresponding limiting hole 6. Two guide rods 11 are fixedly connected to the upper surface of the sliding plate 8. The outer surface of the guide rod 11 is slidably connected to the inner wall of the mounting frame 1. A pressing plate 12 is provided above the slide plate 8. The top of each guide rod 11 is fixedly connected to the bottom surface of the pressing plate 12. A limiting pin 10 is set on the upper surface of the slide plate 8. The limiting pin 10 and the limiting hole 6 can be matched. The guide rod 11 and the pressing plate 12 are installed on the upper surface of the slide plate 8. When the operator needs to open or close the manhole cover body 2, press the pressing plate 12 and the guide rod 11 to make the slide plate 8 and the limiting pin 10 descend, release the connection between the limiting pin 10 and the limiting hole 6, and the manhole cover body 2 can be opened or closed. Under the action of the spring 9, the limiting pin 10 can automatically fall into the interior of the limiting hole 6 to achieve a self-locking effect and prevent the manhole cover body 2 from being opened or closed accidentally.

[0034] Example 2: A manhole cover with a fall-prevention grille and a hinged locking mechanism; please refer to [link / reference]. Figure 5 Two limiting posts 13 are fixedly connected to the inner bottom wall of the cavity 7. The outer surface of each limiting post 13 is slidably connected to the inner wall of the slide plate 8. The limiting posts 13 are installed on the inner bottom wall of the cavity 7 as a fixed connection to fix the limiting posts 13. The limiting posts 13 are connected to the slide plate 8 as a sliding connection to improve the stability of the slide plate 8 during lifting. The upper surface of the mounting frame 1 is provided with a receiving groove 14. The inner wall of the receiving groove 14 is slidably connected to the outer surface of the pressing plate 12. The receiving groove 14 is opened on the upper surface of the mounting frame 1 to achieve the positioning of the receiving groove 14. The inner wall of the receiving groove 14 is connected to the pressing plate 12 as a sliding connection to limit the pressing plate 12 and hide the pressing plate 12 to prevent the pressing plate 12 from protruding on the outside and being run over by pedestrians or vehicles.

[0035] Please see Figure 2 , Figure 3 and Figure 4 The outer surface of the grating plate 3 is fixedly connected with equally spaced sliders 15. Each slider 15 has a threaded fixing bolt 16 threaded onto its inner wall. The outer surface of each fixing bolt 16 is threaded onto the inner wall of the mounting frame 1. A well body 18 is fixedly connected to the bottom surface of the mounting frame 1. The sliders 15 are mounted on the outer surface of the grating plate 3, forming a fixed connection. The fixing bolts 16 are located on the inner wall of the sliders 15, forming a threaded connection, allowing the fixing bolts 16 to be installed on the inner wall of the sliders 15. The fixing bolts 16 are also threaded onto the mounting frame 1, allowing the sliders 15 to... The grating plate 3 is fixed to the upper surface of the mounting frame 1 by fixing bolts 16, so that the grating plate 3 can be fixed inside the mounting frame 1. The upper surface of the mounting frame 1 is provided with equally spaced sliding grooves 17. Each sliding groove 17 is slidably connected to the outer surface of the corresponding slider 15. The sliding grooves 17 are provided on the upper surface of the mounting frame 1. Each sliding groove 17 has two inclined surfaces. The slider 15 is adapted to the sliding groove 17, so that the sliding groove 17 can limit the slider 15. Through the inclined surfaces on both sides of the sliding groove 17, the slider 15 can be automatically guided into the interior of the sliding groove 17 during installation, so as to realize the positioning and installation of the slider 15.

[0036] Please see Figure 1 , Figure 3 and Figure 6A connecting pipe 19 is fixedly connected to the inner wall of the manhole cover body 2. The inner wall of the connecting pipe 19 has an internal thread 20. The connecting pipe 19 is installed on the inner wall of the manhole cover body 2 for a fixed connection, facilitating air circulation. The internal thread 20 is located on the inner wall of the connecting pipe 19 for positioning. A collecting cylinder 21 is located below the connecting pipe 19. A filter screen 23 is fixedly connected to the inner wall of the collecting cylinder 21. The collecting cylinder 21 is positioned below the connecting pipe 19, and a filter screen 23 is provided on the inner wall of the collecting cylinder 21. The filter screen 23 can block external debris such as cigarette butts from falling below. The outer surface of the collection cylinder 21 is provided with an external thread 22, which is threadedly engaged with the internal thread 20. The external thread 22 is provided on the outer surface of the collection cylinder 21 and is adapted to the internal thread 20. Through the connection of the external thread 22 and the internal thread 20, the collection cylinder 21 can be fixed below the connecting pipe 19, so that the debris stored inside the collection cylinder 21 can be removed by disassembling the collection cylinder 21.

[0037] The implementation principle of this application embodiment is as follows: When it is necessary to open the manhole cover body 2, the operator presses down the pressing plate 12 to drive the guide rod 11 down. At this time, the guide rod 11 drives the sliding plate 8 down, and the limiting pin 10 is disconnected from the limiting hole 6. The sliding plate 8 compresses the spring 9, so that the manhole cover body 2 can be opened. When the manhole cover body 2 is opened to a certain angle, under the action of the spring 9, the sliding plate 8 and the limiting pin 10 quickly return to their original positions, so that the limiting pin 10 can connect with the corresponding limiting hole 6, thereby locking the manhole cover body 2. The same applies when the manhole cover body 2 is closed, which can prevent the manhole cover body 2 from being opened or closed accidentally. The moving grid plate 3 drives the slider 15 and the slide groove 1. 7. The slider 15 is fixed by the fixing bolt 16, so that the grating plate 3 can be installed under the manhole cover body 2. When the manhole cover body 2 is opened, the grating plate 3 can prevent people or objects from falling, effectively preventing falling accidents and improving the safety of the device during use. The connecting pipe 19 is installed on the inner wall of the manhole cover body 2. The collection cylinder 21 and the filter screen 23 are installed through the connection of the internal thread 20 and the external thread 22. This allows the device to block and collect cigarette butts and debris from the outside without affecting the ventilation. The cooperation of the internal thread 20 and the external thread 22 facilitates the disassembly of the collection cylinder 21, making it easy to remove the collected debris.

Claims

1. A manhole cover with an anti-fall grille and a hinged locking mechanism, comprising a mounting frame (1), characterized in that: The mounting frame (1) has a manhole cover body (2) on top, and a grid plate (3) is provided inside the mounting frame (1). A fixing block (4) is fixedly connected to the outer surface of the manhole cover body (2), and a fixing shaft (5) is fixedly connected to the inner wall of the fixing block (4). The outer surface of the fixing shaft (5) is provided with equidistant limiting holes (6). A cavity (7) is provided inside the mounting frame (1), and a sliding plate (8) is slidably connected to the inner wall of the cavity (7). Two springs (9) are fixedly connected to the bottom surface of the sliding plate (8), and the bottom end of each spring (9) is connected to the cavity (7). The inner bottom wall is fixedly connected, and two limiting pins (10) are fixedly connected to the upper surface of the slide plate (8). The outer surface of each limiting pin (10) is slidably connected to the inner wall of the mounting frame (1). Each limiting pin (10) is adapted to the corresponding limiting hole (6). Two guide rods (11) are fixedly connected to the upper surface of the slide plate (8). The outer surface of each guide rod (11) is slidably connected to the inner wall of the mounting frame (1). A pressing plate (12) is provided above the slide plate (8). The top of each guide rod (11) is fixedly connected to the bottom surface of the pressing plate (12).

2. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 1, characterized in that: The inner bottom wall of the cavity (7) is fixedly connected to two limiting posts (13), and the outer surface of each limiting post (13) is slidably connected to the inner wall of the slide plate (8).

3. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 1, characterized in that: The upper surface of the mounting frame (1) is provided with a receiving groove (14), and the inner wall of the receiving groove (14) is slidably connected to the outer surface of the pressing plate (12).

4. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 1, characterized in that: The outer surface of the grid plate (3) is fixedly connected with sliders (15) arranged at equal intervals. Each slider (15) has a screw-connected fixing bolt (16) on its inner wall. The outer surface of each fixing bolt (16) is threaded to the inner wall of the mounting frame (1). The bottom surface of the mounting frame (1) is fixedly connected with a well body (18).

5. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 4, characterized in that: The upper surface of the mounting frame (1) is provided with equally spaced sliding grooves (17), and each sliding groove (17) is slidably connected to the outer surface of the corresponding slider (15).

6. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 1, characterized in that: The inner wall of the manhole cover body (2) is fixedly connected to a connecting pipe (19), and the inner wall of the connecting pipe (19) is provided with an internal thread (20).

7. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 6, characterized in that: A collection cylinder (21) is provided below the connecting pipe (19), and a filter screen (23) is fixedly connected to the inner wall of the collection cylinder (21).

8. A manhole cover with an anti-fall grille and a hinged locking mechanism according to claim 7, characterized in that: The outer surface of the collecting cylinder (21) is provided with an external thread (22), which is threadedly engaged with the internal thread (20).

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