Anti-falling net rack for municipal road inspection well
By designing a detachable safety net frame for municipal road manholes, combining a lower safety net frame and an upper safety net frame, a two-in-one structure of safety net frame and drainage warning cage is achieved, solving the problems of complex installation and space occupation in existing technologies, and improving ease of use and functional versatility.
Patent Information
- Application Number
- CN202422559326.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-10-22
AI Technical Summary
The existing fall-prevention netting and drainage warning cages for manholes on municipal roads are independent structures, which are complicated to install and use, and occupy public space.
Design a detachable safety net frame for municipal road manholes, combining a lower safety net frame and an upper safety net frame, and using support components to switch between the safety net frame and the drainage warning cage. This two-in-one structure eliminates the need for transportation and avoids occupying public space.
It enables the switching between the functions of the fall protection net frame and the drainage warning cage, simplifies the installation process, improves the convenience of use and space utilization, and enhances the convenience of use and space efficiency, thus achieving functional diversity.
Smart Images
Figure CN223766857U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fall protection grid technology, and more specifically, to a fall protection grid for municipal road manholes. Background Technology
[0002] Inspection wells are installed on municipal roads, usually at pipe intersections and bends, to facilitate the maintenance of underground infrastructure such as power supply, water supply, drainage, sewage, communications, cable TV, gas pipes, and street light lines. Anti-fall nets are installed at the opening of the inspection wells to prevent people from falling into the well and causing accidents when the well cover is tilted.
[0003] As is well known, numerous consecutive torrential rains in recent years have caused many cities to enter "sea-viewing mode." Continuous rainfall caused severe flooding, paralyzing traffic and closing schools throughout the city. Roads were submerged, and subways were flooded like waterfalls. Given the current state of underground drainage systems in many large and medium-sized cities, a complete overhaul of the sewer system is not realistic. To ensure timely drainage and safety of manhole covers at key points during the flood season, various cities installed drainage warning cages at manholes on roads prone to flooding before heavy rains. This effectively improved the drainage capacity of roads and ensured the safety of vehicles and pedestrians. However, since the current fall protection nets and drainage warning cages are two separate structures, when draining flooded roads, the manhole cover needs to be opened and the drainage warning cage inserted into the manhole. For the convenience of installing fall protection nets, they are usually placed close to the manhole opening. However, when installing drainage warning cages, a part of the whole unit needs to be inserted into the manhole, and then the flange part is supported at the manhole opening. This requires disassembling the fall protection net at the manhole opening before the drainage warning cage can be installed. This process is relatively complicated and wastes a lot of time. In addition, after use, the drainage warning cages need to be removed, transported, and stored, occupying a large amount of public space.
[0004] In view of this, we propose a safety net frame for preventing falls from manholes on municipal roads. Utility Model Content
[0005] 1. Technical problems to be solved
[0006] The purpose of this application is to provide a fall-prevention net frame for municipal road inspection wells, which solves the technical problems in the background art mentioned above, and realizes the integration of the fall-prevention net frame and the drainage warning cage into one, which can be switched as needed. The drainage warning cage after switching can be stored in the well without the need for transportation and storage, and does not occupy public space.
[0007] 2. Technical Solution
[0008] This application provides a fall prevention net frame for municipal road inspection wells, including: a detachable lower protective net frame installed inside the well and an upper protective net frame set on the lower protective net frame. Multiple railings are distributed in a ring around the lower edge of the upper protective net frame, penetrating the lower protective net frame. A support member that is detachable from the lower protective net frame is rotatably provided at the center of the upper protective net frame, and a warning light is detachably installed on the support member.
[0009] As an optional solution to the technical solution in this application, the lower protective net frame includes a lower outer ring plate and hooks and multiple sets of expansion bolts distributed in a ring on the outer wall of the lower outer ring plate. The expansion bolts include bolts and multiple nuts threaded to the bolts. The lower outer ring plate has multiple first through holes that are adapted to the railings. The lower end of the railing is fixed with a limiting flange.
[0010] As an optional solution to the technical solution of this application, the support member includes a long screw, a connecting rod vertically fixed to the upper end of the long screw, a handle, and an internally threaded sleeve fixed to the center of the lower protective net frame. The long screw is threadedly connected to the internally threaded sleeve. The upper protective net frame includes an upper outer ring plate and a center plate. Multiple railings are distributed in a ring on the upper outer ring plate. The center plate has a second through hole adapted to the long screw. The long screw is coaxially fixed with a first limiting ring placed on the lower surface of the center plate.
[0011] As an optional solution to the technical solution of this application, the upper end of the long screw is coaxially provided with a threaded hole, the lower end of the warning light is fixed with a threaded rod that is threadedly connected to the threaded hole, and a plug is threadedly connected to the threaded hole.
[0012] As an optional solution to the technical solution of this application, the connecting rod is vertically provided with a third through hole, the handle is slidably inserted into the third through hole, and both ends of the handle are fixed with second limiting rings.
[0013] As an optional solution to the technical solution in this application, the outer wall of the railing is covered with multiple reflective stickers, which are spaced apart.
[0014] 3. Beneficial effects
[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0016] 1. This application uses an upper protective net frame installed on a lower protective net frame. The lower end of the upper protective net frame has multiple railings that slide into the lower protective net frame in a ring. The upper end of the support is rotatably connected to the upper protective net frame, and the lower end is detached from the lower protective net frame. The overall structure can be switched between the form of a fall prevention net frame and a drainage warning cage. The two-in-one structure has more diverse functions and does not require transportation or occupy public space. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a municipal road manhole anti-fall net frame disclosed in a preferred embodiment of this application;
[0018] Figure 2 This is a schematic diagram of the overall fall-prevention structure of a municipal road manhole fall-prevention net frame, as disclosed in a preferred embodiment of this application.
[0019] Figure 3 This application discloses a preferred embodiment of a municipal road manhole anti-fall net frame. Figure 2 Enlarged structural diagram at point A in the middle;
[0020] Figure 4 This is a schematic diagram of the overall assembly of a municipal road manhole anti-fall net frame into a drainage warning cage state, as disclosed in a preferred embodiment of this application;
[0021] Figure 5 This application discloses a preferred embodiment of a municipal road manhole anti-fall net frame. Figure 4 Enlarged structural diagram at point B;
[0022] Figure 6 This is a schematic diagram of the lower protective mesh structure of a municipal road manhole anti-fall mesh structure disclosed in a preferred embodiment of this application;
[0023] Figure 7 This is a schematic diagram of the expansion bolt structure of an anti-fall net frame for a municipal road inspection well, as disclosed in a preferred embodiment of this application.
[0024] Figure 8 This is a schematic diagram of the railing structure of a fall-prevention net frame for a municipal road inspection well, as disclosed in a preferred embodiment of this application.
[0025] Figure 9 This is a schematic diagram of the support structure of a municipal road manhole anti-fall net frame disclosed in a preferred embodiment of this application;
[0026] Figure 10 This is a schematic diagram of the upper protective net frame and railing structure of a municipal road inspection well anti-fall net frame disclosed in a preferred embodiment of this application;
[0027] Explanation of the labels in the diagram:
[0028] 1. Lower protective net frame; 11. Lower outer ring plate; 111. First through hole; 12. Internal threaded sleeve; 13. Hook; 14. Expansion bolt; 141. Bolt; 142. Nut; 2. Upper protective net frame; 21. Upper outer ring plate; 22. Center plate; 221. Second through hole; 3. Railing; 31. Limiting flange; 32. Reflective sticker; 4. Warning light; 5. Support component; 51. Long screw; 511. First limiting ring; 512. Threaded hole; 52. Connecting rod; 521. Third through hole; 53. Handle; 531. Second limiting ring; 54. Plug. Detailed Implementation
[0029] The present application will be further described in detail below with reference to the accompanying drawings.
[0030] A safety net frame for preventing falls from manholes on municipal roads includes: a detachable lower safety net frame 1 installed inside the manhole and an upper safety net frame 2 installed on the lower safety net frame 1. Multiple railings 3 are distributed in a ring around the lower edge of the upper safety net frame 2, penetrating the lower safety net frame 1. A support member 5, which is detachable from the lower safety net frame 1, is rotatably installed at the center of the upper safety net frame 2. A warning light 4 is detachably installed on the support member 5.
[0031] Reference Figures 1-10 The lower protective net frame 1 is fixed inside the well, and the warning light 4 is removed from the support 5. At the same time, the upper protective net frame 2 and multiple railings 3 are pressed down so that the lower protective net frame 1 and the upper protective net frame 2 are in contact. At this time, the two protective net frames form a fall prevention net frame. When the well cover is opened for drainage safety protection, the upper protective net frame 2, multiple railings 3 and support 5 are lifted upwards, and the lower end of the support 5 is fixed on the lower protective net frame 1. At this time, the upper protective net frame 2, the lower protective net frame 1 and multiple railings 3 form a drainage warning cage to protect the well opening. Finally, the warning light 4 is installed on the support 5 so that the warning light 4 can be activated to provide a warning.
[0032] The lower protective net frame 1 includes a lower outer ring plate 11 and hooks 13 distributed in a ring on the outer wall of the lower outer ring plate 11, as well as multiple sets of expansion bolts 14. The expansion bolts 14 include bolts 141 and multiple nuts 142 threadedly connected to the bolts 141. The lower outer ring plate 11 has multiple first through holes 111 that are adapted to the railing 3. The lower end of the railing 3 is fixed with a limiting flange 31.
[0033] Reference Figure 6 and Figure 7Multiple installation holes are drilled on the inner wall of the wellhead using a drilling rig. Each installation hole corresponds to a hook 13. An expansion bolt 14 is inserted into the installation hole, and the expansion bolt 14 is fixed to the inner wall of the wellhead by one of the nuts 142 being screwed clockwise. Then, the lower protective net frame 1 is placed into the well, with the hook 13 positioned on one side of the bolt 141. The bolt 141 passes through the opening side of the hook 13, causing the hook 13 to scrape against the bolt 141. The hook 13 is positioned between two nuts 142. By adjusting the screws of the two nuts 142, the hook 13 is pressed and fixed onto the bolt 141. The railing 3 is slidably inserted into the first through hole 111 for guidance, and the limiting flange 31 is larger than the first through hole 111 to prevent the railing 3 from falling off the lower outer ring plate 11.
[0034] The support member 5 includes a long screw 51, a connecting rod 52 vertically fixed to the upper end of the long screw 51, a handle 53, and an internally threaded sleeve 12 fixed to the center of the lower protective net frame 1. The long screw 51 is threadedly connected to the internally threaded sleeve 12. The upper protective net frame 2 includes an upper outer ring plate 21 and a center plate 22. Multiple railings 3 are distributed in a ring on the upper outer ring plate 21. The center plate 22 has a second through hole 221 adapted to the long screw 51. The long screw 51 is coaxially fixed with a first limiting ring 511 placed on the lower surface of the center plate 22.
[0035] Reference Figure 3 , Figure 4 , Figure 6 , Figure 9 and Figure 10 The long screw 51 is rotatably mounted on the center plate 22 via the connecting rod 52 and the first limiting ring 511, preventing the long screw 51 from moving axially. The connecting rod 52 is rotated by the handle 53, and the connecting rod 52 drives the long screw 51 to rotate. When the lower end of the long screw 51 is threadedly connected to the internal threaded sleeve 12 fixed in the center of the lower protective net frame 1, the upper protective net frame 2 in the supported state is fixedly supported on the lower protective net frame 1 by the long screw 51. When the threaded part of the lower end of the long screw 51 is disengaged from the internal threaded sleeve 12, the upper protective net frame 2 can be lowered.
[0036] The upper end of the long screw 51 is coaxially provided with a threaded hole 512, and the lower end of the warning light 4 is fixed with a threaded rod that is threadedly connected to the threaded hole 512. A plug 54 is threadedly connected to the threaded hole 512.
[0037] Reference Figure 3 and Figure 5 and Figure 9 When not using the threaded hole 512, the plug 54 is threaded into the threaded hole 512 to prevent the accumulation of sludge in the threaded hole 512. When in use, the plug 54 is removed, and then the threaded rod at the lower end of the warning light 4 is threaded into the threaded hole 512 to facilitate the installation of the warning light 4.
[0038] The connecting rod 52 has a third through hole 521 in the vertical direction. The handle 53 is slidably inserted into the third through hole 521. Both ends of the handle 53 are fixed with a second limiting ring 531.
[0039] Reference Figure 5 and Figure 9 When the handle 53 drives the long screw 51 to rotate, the second limiting ring 531 at the lower end of the handle 53 abuts against the connecting rod 52. After the lower end of the long screw 51 is threadedly connected to the internal threaded sleeve 12, the handle 53 is pressed down so that the upper second limiting ring 531 abuts against the connecting rod 52. At the same time, the handle 53 is inserted into the upper protective net frame 2, and the rotation of the handle 53 is restricted by the protective rod of the upper protective net frame 2. Thus, when the drainage warning cage is supported, the problem of the long screw 51 rotating on its own and falling off the internal threaded sleeve 12 can be avoided.
[0040] The outer wall of the railing 3 is covered with multiple reflective stickers 32, which are spaced apart.
[0041] Reference Figure 8 The reflective stickers 32, which are set at intervals, can enhance the warning effect of the railing 3 when the drainage warning cage is in the state.
[0042] Working principle: Multiple mounting holes are made in the inner wall of the well. Expansion bolts 14 are then inserted into these holes, and the bolts 142 are rotated to fix them in place. Hooks 13 are then hung on bolts 141, and the hooks 13 are secured to the bolts 141 by adjusting the two nuts 142. Subsequently, when the lower protective net frame 1 and the upper protective net frame 2 are in contact (refer to...), the working principle is as follows: Figure 2 At this point, the entire structure is a fall-prevention net frame to prevent pedestrians from falling. During heavy rainfall, the manhole cover is opened, and the upper protective net frame 2 is pulled upwards. The handle 53 is then turned counter-clockwise, causing the lower end of the long screw 51 to connect with the internal threaded sleeve 12. The long screw 51 supports the upper protective net frame 2. Multiple railings 3 protect the area between the lower and upper protective net frames 1 and 2. Under gravity, the handle 53 is inserted into the upper protective net frame 2. Then, the plug 54 is removed from the threaded hole 512, and the warning light 4 is threaded into the threaded hole 512, completing the drainage warning cage state (refer to...). Figure 4 When retracting, remove the warning light 4, plug the threaded hole 512 with the plug 54, and turn the handle 53 clockwise to disengage the long screw 51 from the internal threaded sleeve 12.
Claims
1. A municipal road inspection well anti-falling net rack, characterized in that: The utility model provides a detachable lower protective net frame (1) installed in the well and upper protective net frame (2) arranged on the lower protective net frame (1), the lower edge of the upper protective net frame (2) is annularly distributed with a plurality of railings (3) penetrating the lower protective net frame (1), and a support (5) is rotatably arranged in the center of the upper protective net frame (2) and detachable with the lower protective net frame (1), and a warning light (4) is detachably installed on the support (5). The lower protective net frame (1) comprises a lower outer ring plate (11), hooks (13) annularly distributed on the outer wall of the lower outer ring plate (11) and a plurality of groups of expansion bolts (14), the expansion bolts (14) comprise bolts (141) and a plurality of nuts (142) threadedly connected with the bolts (141), the lower outer ring plate (11) is annularly distributed with a plurality of first through holes (111) matched with the railings (3), and the lower end of the railing (3) is fixed with a limiting flange (31).
2. The anti-falling net rack for a municipal road inspection well according to claim 1, characterized in that: The support (5) comprises a long screw rod (51), a connecting rod (52) vertically fixed at the upper end of the long screw rod (51), a handle (53) and an inner threaded sleeve (12) fixed in the center of the lower protective net frame (1), the long screw rod (51) is threadedly connected with the inner threaded sleeve (12), the upper protective net frame (2) comprises an upper outer ring plate (21) and a center plate (22), a plurality of railings (3) are annularly distributed on the upper outer ring plate (21), the center plate (22) is provided with a second through hole (221) matched with the long screw rod (51), and the long screw rod (51) is coaxially fixed with a first limiting ring (511) arranged on the lower surface of the center plate (22).
3. The anti-falling net rack of the municipal road inspection well according to claim 1, characterized in that: The upper end of the long screw rod (51) is coaxially provided with a threaded hole (512), the lower end of the warning light (4) is fixed with a threaded rod threadedly connected with the threaded hole (512), and the threaded hole (512) is threadedly connected with a plug (54).
4. The anti-falling net rack of the municipal road inspection well according to claim 3, characterized in that: The connecting rod (52) is vertically provided with a third through hole (521), and the handle (53) is slidably inserted into the third through hole (521), both ends of the handle (53) are fixed with second limiting rings (531).
5. The anti-falling net rack of the municipal road inspection well according to claim 3, characterized in that: The outer wall of the railing (3) is wrapped with a plurality of reflective stickers (32), and the reflective stickers (32) are arranged at intervals.
6. The anti-falling net rack of the municipal road inspection well according to claim 1, characterized in that: