A fixing mechanism of a well pit anti-falling net

Abstract

The utility model discloses a kind of fixing mechanism of well pit anti-falling net, including well pit, several installation grooves are opened in the well pit, fixed mechanism is installed in the installation groove, the fixed mechanism includes fixed cylinder, movable block, hook and spring, the fixed cylinder is installed in installation groove, the movable block slides in fixed cylinder, the hook is installed on movable block, the hook is hung with anti-falling net, spring is installed between the movable block and fixed cylinder, the hook is located in installation groove under the action of spring, it is solved that the fixing mechanism of the existing anti-falling net is all in well pit pouring time, pre-buried piece hook is pre-buried, and this kind of fixed mechanism is generally directly exposed in well pit, if pedestrian falls into well pit, although it will be caught by anti-falling net, but it can be directly hit on these fixed mechanisms in falling process, at least cause skin abrasion, muscle contusion, more likely to cause fracture, craniocerebral injury and other serious injury problems.

Description

Technical Field

[0001] This utility model relates to the field of fall protection net technology, and in particular to a fixing mechanism for fall protection nets in wells. Background Technology

[0002] Urban underground pipe networks are generally more than 1.2 meters deep, and there is usually a longitudinal manhole in the underground pipe network at regular intervals. When the manhole cover is opened for maintenance, there is a risk that pedestrians may accidentally fall into the manhole. Because the underground pipe network is deep, pedestrians who fall into the manhole are likely to suffer serious injuries. Therefore, it is necessary to install a fall protection net in such manholes.

[0003] The existing safety nets are fixed by pre-embedded hooks that are embedded in the manhole during the pouring of concrete. These fixing mechanisms are generally directly exposed inside the manhole, which poses a certain safety hazard. If a pedestrian falls into the manhole, although the safety net will catch them, they may directly hit these fixing mechanisms during the fall. This could result in minor injuries such as skin abrasions and muscle contusions, or even serious injuries such as fractures and head injuries. Utility Model Content

[0004] This application provides a fixing mechanism for a manhole safety net, which can solve the problem that existing safety net fixing mechanisms are exposed inside the manhole. If a pedestrian accidentally falls into the manhole, they may directly hit these fixing mechanisms during the fall, causing minor injuries such as skin abrasions and muscle contusions, or even serious injuries such as fractures and head injuries.

[0005] This application provides a fixing mechanism for a manhole safety net, including a manhole with several installation slots inside. A fixing mechanism is installed in each installation slot. The fixing mechanism includes a fixing cylinder, a movable block, a hook, and a spring. The fixing cylinder is installed in the installation slots, the movable block slides in the fixing cylinder, the hook is installed on the movable block, and a safety net is hung on the hook. A spring is installed between the movable block and the fixing cylinder, and the hook is located in the installation slot under the action of the spring. The fixing cylinder has a slot.

[0006] Furthermore, a stabilizing rod is fixedly connected to the outer side of the fixed cylinder.

[0007] Furthermore, the movable block is divided into an installation part and a sliding part. The hook is installed on the installation part, the sliding part slides inside the fixed cylinder, a limit strip is fixedly connected inside the fixed cylinder, and a limit groove that cooperates with the limit strip is provided on the sliding part.

[0008] Furthermore, a rotating platform is rotatably connected inside the fixed cylinder, one end of the spring is fixedly connected to the rotating platform, and the other end of the spring is fixedly connected to the sliding part.

[0009] Furthermore, the fixed cylinder is divided into a first cavity, a second cavity, and a third cavity in sequence. The limiting strip is located in the second cavity, the rotating platform and the spring are located in the third cavity, and the sliding part can enter the first cavity from the second cavity.

[0010] Furthermore, a limiting block one is fixedly connected inside the first cavity, a limiting block two is fixedly connected to the sliding part, a positioning hole one is opened on the fixed cylinder, a positioning hole two is opened on the sliding part, and a positioning pin is inserted into the positioning hole one.

[0011] Furthermore, rubber pads are fixedly connected inside the positioning hole one and positioning hole two.

[0012] In summary, the beneficial effects of the fixing mechanism for a manhole safety net in this application are as follows: by setting the hook in the installation groove, the hook is normally hidden in the installation groove by utilizing the force of the spring, effectively avoiding the risk of pedestrians directly colliding with the hook when falling into the manhole. This fundamentally solves the safety hazards of existing exposed hooks that easily cause skin abrasions, fractures, and head injuries, greatly improving the safety of manhole use and significantly enhancing safety protection performance. Furthermore, the stabilizing rod on the outside of the fixing cylinder strengthens the connection between the fixing mechanism and the installation groove, preventing the fixing mechanism from loosening or shifting under force. The cooperation between the limiting strip and the limiting groove restricts the sliding direction of the movable block, preventing the movable block from rotating inside the fixing cylinder, ensuring a stable and orderly extension and retraction process of the hook, and guaranteeing the effective fixing of the safety net. Attached Figure Description

[0013] Figure 1 A perspective view of the utility model;

[0014] Figure 2 This is a structural schematic diagram of the fixing mechanism of the utility model;

[0015] Figure 3 This is a cross-sectional view of the fixing mechanism of the utility model.

[0016] Figure 4 This is a top view of the fixing mechanism of the utility model.

[0017] Reference numerals in the attached drawings: 1. Well; 2. Mounting groove; 3. Fixing mechanism; 301. Fixing cylinder; 302. Movable block; 303. Hook; 304. Spring; 4. Groove; 5. Stabilizing rod; 6. Mounting part; 7. Sliding part; 8. Limiting strip; 9. Limiting groove; 10. Rotating table; 11. First cavity; 12. Second cavity; 13. Third cavity; 14. Limiting block one; 15. Limiting block two; 16. Positioning hole one; 17. Positioning hole two; 18. Positioning pin. Detailed Implementation

[0018] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model should be considered within the protection scope of this utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

[0019] like Figures 1 to 4 As shown, a fixing mechanism for a manhole fall prevention net includes a manhole 1, which is a cylindrical concrete structure. Several installation grooves 2 are provided inside the manhole 1, and the installation grooves 2 are arranged in a ring around the center of the manhole 1. A fixing mechanism 3 is installed in the installation grooves 2. The fixing mechanism 3 includes a fixing cylinder 301, a movable block 302, a hook 303, and a spring 304. The fixing cylinder 301 is fixedly connected to the installation groove 2, and the inner wall of the fixing cylinder 301 is in contact with the inner wall of the installation groove 2. The movable block 302 can slide inside the fixing cylinder 301. The hook 303 is installed at one end of the movable block 302. A spring 304 is installed between the fixing cylinder 301 and the movable block 302. In the initial state, the spring 304 pulls the movable block 302, causing the movable block 302 to be in a retracted state. At this time, the hook on the movable block is in the installation groove 2. A slot 4 is provided on the fixing cylinder 301, which allows the movable block 302 to extend out from the fixing cylinder 301.

[0020] Furthermore, such as Figure 2 As shown, several stabilizing rods 5 are fixedly connected to the outer wall of the fixed cylinder 301. The stabilizing rods 5 are arranged in a ring around the center of the fixed cylinder 301. The stabilizing rods 5 can enhance the connection strength between the fixed cylinder 301 and the mounting groove 2 and prevent the fixed cylinder 301 from loosening when subjected to force.

[0021] Furthermore, such as Figure 3 and Figure 4 As shown, the fixed cylinder 301 is internally divided into a first cavity 11, a second cavity 12, and a third cavity 13. The second cavity 12 is located in the middle. Several limiting strips 8 are fixedly connected inside the second cavity 12. The length of the limiting strips 8 is the same as the length of the second cavity 12. The movable block 302 is divided into a sliding part 7 and a mounting part 6. A limiting groove 9 that cooperates with the limiting strips 8 is opened on the sliding part 7. The limiting strips 8 are stuck in the limiting groove 9. This allows the sliding part 7 to move only along the length direction of the limiting strips 8, avoiding rotation. The rest of the sliding part 7 is in contact with the inner wall of the second cavity 12. The hook and the mounting part 6 are connected by threads.

[0022] Furthermore, such as Figure 3As shown, a rotating platform 10 is provided inside the fixed cylinder 301. One end of the rotating platform 10 abuts against the fixed cylinder 301 and rotates around the abutment point. The other end of the rotating platform 10 is fixedly connected to one end of the spring 304. The other end of the spring 304 is fixedly connected to the sliding part 7. The spring 304 and the rotating platform 10 are located inside the third cavity 13.

[0023] Furthermore, such as Figure 3 and Figure 4 As shown, a limiting block 14 is fixedly connected inside the first cavity 11, and a limiting block 2 15 is fixedly connected to the sliding part 7. A positioning hole 16 is provided on the fixed cylinder 301, which communicates with the first cavity 11. A positioning hole 2 17 is provided on the sliding part 7, which is the same as the positioning hole 16. Rubber pads are fixedly connected inside the positioning holes 16 and 2 17. A positioning pin 18 is inserted into the positioning hole 16. If it is necessary to replace the fall protection net or the hook 303, simply pull the hook 303. The hook 303 will extend from the slot 4 along with the mounting part 6. The mounting part 6 will drive the sliding part 7 from the second cavity 12 into the first cavity 11. When the right end of the sliding part 7 abuts against the rightmost end of the first cavity 11, The left end of the sliding part 7 is just separated from the limiting strip 8, and the right end of the sliding part 7 will lift the positioning pin 18. Then, the hook 303 is rotated, which will drive the mounting part 6 and the sliding part 7 to rotate. When the second limiting block 15 on the sliding part 7 presses against the first limiting block 14 in the first cavity 11, the second positioning hole 17 on the sliding part 7 is just concentric with the first positioning hole 16. At this time, pressing the positioning pin 18 can fix the rotation of the sliding part 7, and the limiting groove 9 is offset from the limiting strip 8. The sliding block is pressed by the limiting strip 8, which restricts the movement of the sliding part 7. At this time, one-third of the mounting part 6 and the hook 303 are outside the mounting groove 2, which is convenient for the operator to operate. At the same time, the rubber pad can prevent the positioning pin 18 from falling off accidentally and reduce wear during insertion and removal.

[0024] Working principle of the utility model: In the initial state, the spring 304 is in a naturally contracted state, and its tension acts on the sliding part 7 of the movable block 302, pulling the movable block 302 into the fixed cylinder 301, so that the movable block 302 is in a contracted state. At this time, the mounting part 6 of the movable block 302 and the hook 303 are completely housed in the mounting groove 2, preventing the hook 303 from being exposed in the manhole space, thus eliminating the safety hazard of direct collision between the pedestrian and the hook 303 when falling. The stabilizing rod 5 on the outer wall of the fixed cylinder 301 is embedded in the concrete structure of the manhole, ensuring that the fixed cylinder 301 does not loosen or shift when under force, providing stable support for the overall mechanism. When a pedestrian accidentally falls into the manhole and comes into contact with the fall protection net, the fall protection net will exert force on the hook. 303 generates an outward pulling force, which is transmitted to the movable block 302, overcoming the contraction force of the spring 304 and causing the movable block 302 to slide outward along the axial direction of the fixed cylinder 301. The sliding part 7 of the movable block 302 moves within the second cavity 12. Since the limiting strip 8 is inserted into the limiting groove 9 of the sliding part 7, the rotational freedom of the sliding part 7 is restricted, so that the movable block 302 can only slide smoothly along the length direction of the limiting strip 8, preventing the hook 303 from detaching from the anti-fall net attachment point due to rotation. At the same time, the sliding part 7 is tightly fitted with the inner wall of the second cavity 12 to ensure the stability of the sliding process. During this process, the spring 304 is further stretched, and its elastic potential energy is converted into a buffering force, effectively offsetting part of the falling impact force and reducing the instantaneous force of the anti-fall net on the human body.

Claims

1. A fixing mechanism for a well safety net, characterized in that, The device includes a cellar (1), which has several installation slots (2) and a fixing mechanism (3) installed in each installation slot (2). The fixing mechanism (3) includes a fixing cylinder (301), a movable block (302), a hook (303), and a spring (304). The fixing cylinder (301) is installed in the installation slot (2), the movable block (302) slides in the fixing cylinder (301), the hook (303) is installed on the movable block (302), and a fall protection net is hung on the hook (303). A spring (304) is installed between the movable block (302) and the fixing cylinder (301), and the hook (303) is located in the installation slot (2) under the action of the spring (304). The fixing cylinder (301) has a slot (4).

2. The fixing mechanism for a well safety net according to claim 1, characterized in that, A stabilizing rod (5) is fixedly connected to the outside of the fixed cylinder (301).

3. The fixing mechanism for a well safety net according to claim 2, characterized in that, The movable block (302) is divided into an installation part (6) and a sliding part (7). The hook (303) is installed on the installation part (6). The sliding part (7) slides in the fixed cylinder (301). A limit strip (8) is fixedly connected in the fixed cylinder (301). A limit groove (9) that cooperates with the limit strip (8) is provided on the sliding part (7).

4. The fixing mechanism for a well safety net according to claim 3, characterized in that, A rotating platform (10) is rotatably connected inside the fixed cylinder (301). One end of the spring (304) is fixedly connected to the rotating platform (10), and the other end of the spring (304) is fixedly connected to the sliding part (7).

5. The fixing mechanism for a well safety net according to claim 4, characterized in that, The fixed cylinder (301) is divided into a first cavity (11), a second cavity (12) and a third cavity (13) in sequence. The limiting strip (8) is located in the second cavity (12), the rotating table (10) and the spring (304) are located in the third cavity (13), and the sliding part (7) can enter the first cavity (11) from the second cavity (12).

6. The fixing mechanism for a well safety net according to claim 5, characterized in that, A limiting block one (14) is fixedly connected inside the first cavity (11), a limiting block two (15) is fixedly connected to the sliding part (7), a positioning hole one (16) is opened on the fixed cylinder (301), a positioning hole two (17) is opened on the sliding part (7), and a positioning pin (18) is inserted into the positioning hole one (16).

7. The fixing mechanism for a well safety net according to claim 6, characterized in that, Rubber pads are fixedly connected inside the positioning hole one (16) and positioning hole two (17).

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