Anti-falling inspection well cover

Abstract

The utility model discloses an anti-falling inspection well cover, and belongs to the technical field of water supply and drainage engineering. The anti-falling inspection well cover comprises a cover top plate, an anti-falling grating plate and a circular base for supporting the cover top plate and the anti-falling grating plate, and one side of the cover top plate is hinged to the upper portion of the base through a cover opening hinged support to form a first-layer overturning structure; a supporting steel beam and a bracket are transversely fixed on the inner wall of the base; fixed frames of the anti-falling grating plates are hinged to the supporting steel beams, free frames of the anti-falling grating plates are lapped on the supporting bases in the working state to form a second-layer overturning structure, multiple steps can be arranged according to needs, and an anti-falling structure with multiple layers of anti-falling grating plates is formed and usually comprises two layers. According to the anti-falling inspection well cover, a common non-anti-falling inspection well cover can be upgraded and reformed, the manufacturing method is simple, use and maintenance are convenient, and under the condition that the problems that the inspection well cover is stolen, lost, rushed open by flood or shifted and the like are solved, the purpose of preventing pedestrians or bicycles or electric vehicles from falling to hurt people is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water supply and drainage engineering technology, and more specifically to a manhole cover designed to prevent falls. Background Technology

[0002] Due to the loss of manhole covers, their being overturned or submerged by floods, or being opened for drainage, accidents involving pedestrians, bicycles, or electric vehicles falling and injuring people occur frequently.

[0003] Current conventional solutions include:

[0004] 1) A nylon protective net is hung under the manhole cover. However, the net is easy to fall off, has low strength and insufficient reliability, and is also inconvenient for cleaning and maintaining the sludge due to the obstruction of the nylon protective net. It is also easy to lose the net after it is fixed.

[0005] 2) Patent CN215857876U discloses a fall-prevention manhole cover, comprising a holding ring, a fixing ring fitted on the top of the holding ring, the fixing ring being fixedly connected to the outer wall of the holding ring, a sliding tube provided in the inner cavity of the holding ring, the outer wall of the sliding tube being fixedly connected to the inner wall of the holding ring, a threaded rod slidably connected inside the sliding tube, a limit plate being fixedly connected to the bottom of the threaded rod, and a nut being provided above the sliding tube. This utility model, through the cooperative arrangement of the sliding tube, threaded rod, limit plate, and nut, allows the manhole cover to be moved upwards and fixed to the top of the manhole when there is heavy rain. This improves drainage speed without requiring the manhole cover to be removed, thus maintaining its protective function and minimizing the risk of pedestrians or vehicles falling into the manhole. However, this utility model patent is for a liftable movable manhole cover, which is difficult to maintain, clean, and remove mud from the manhole, and opening the cover is troublesome and difficult.

[0006] 3) Patent CN204059414U discloses an anti-fall manhole cover, which includes a bracket and a manhole cover body. The bracket includes a first placement surface and a second placement surface at different heights, both of which are below ground level. The manhole cover body includes a first manhole cover body and a second manhole cover body, with the diameter of the first manhole cover body being larger than that of the second manhole cover body. The first and second manhole cover bodies are respectively mounted on the first and second placement surfaces of the bracket. The first manhole cover body is made of metal, and the second manhole cover body is made of concrete. This utility model is a direct placement solution for a double-layer manhole cover. The second manhole cover at the bottom has an unsatisfactory fixing effect, no anti-theft effect, and the manhole cover cannot withstand flood backflow.

[0007] The main problems it currently faces are:

[0008] 1) Currently, manhole covers used in conventional engineering projects typically do not have anti-fall safety features;

[0009] 2) A small number of existing manhole covers have fall-prevention safety measures, with nylon protective netting attached. However, these covers are prone to falling off, have low strength, and are not reliable enough. They are easily washed away by floods, and their preservation rate is low after long-term use and dredging.

[0010] 3) Existing anti-fall manhole cover technology has an inadequate design and poor protective effect. It is inconvenient to open the cover for maintenance or inspection. It is also not securely fixed, making it easy to lose or be flushed away. Utility Model Content

[0011] 1. Technical problem to be solved by the utility model

[0012] In view of the above-mentioned problems of existing manhole covers, this utility model provides a fall-prevention manhole cover. Through at least two layers of flipping structure, it forms multiple fall prevention and multiple flipping, and the maintenance work is simple, quick and convenient.

[0013] 2. Technical Solution

[0014] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0015] A type of anti-fall manhole cover includes a top plate, an anti-fall grating plate, and a base supporting the two layers of cover plates. One side edge of the top plate is hinged to the upper part of the base via an opening hinge, forming a first-layer flip structure. A supporting steel beam and a support are horizontally fixed on the inner wall of the base. The fixed frame of the anti-fall grating plate is hinged to the supporting steel beam, and the free frame overlaps on the support when in operation, forming a second-layer flip structure. Multiple steps can also be set as needed to form a multi-layer anti-fall grating plate structure. It is usually a two-layer structure and can upgrade ordinary manhole covers without anti-fall protection. It is simple to manufacture, easy to use and maintain, and prevents pedestrians, bicycles, or electric vehicles from falling and injuring people in the event of the manhole cover being stolen, lost, washed away by floods, or displaced.

[0016] A further technical solution involves a semi-circular support with the ring end horizontally welded to the inner wall of the base opposite the supporting steel beam. The free frame of the anti-fall grating plate overlaps the semi-circular surface of the support when in operation, making it easy to open or close.

[0017] A further technical solution involves a movable hook rotatably connected to the free frame edge of the fall arresting grating via a hook sleeve. The wall of the hook sleeve is fixedly connected to the free frame edge, and the hook rod of the movable hook passes into the hook sleeve, with the hook end protruding outside the sleeve, facilitating the use of a hook to lift and flip the fall arresting grating.

[0018] A further technical solution is that the support includes at least support A and support B, or more than two, forming a multi-point overlap of the anti-fall grating to improve its anti-fall stability; the hook end of the movable hook is hooked into the half ring of the support when the free edge of the anti-fall grating is in the working state, which can solve the problem of the anti-fall grating being overturned by flood backflow.

[0019] A further technical solution is that the fixed frame of the fall arresting grating includes supporting angle steel and limiting bracket angle steel fixedly connected to the side of the supporting angle steel; after the Π-shaped opening formed by welding the supporting angle steel and the limiting bracket angle steel is opened laterally, it is then fixed by inserting and screwing in the lateral fixing bolts. The fixing bolts and the Π-shaped opening form a hinged connection of the supporting steel beam, which can effectively improve the support stability of the fall arresting grating after it is overturned.

[0020] A further technical solution involves installing bolt support tubes between the П-shaped openings of the fixing bolts to prevent deformation of the angle steel when the bolts are tightened.

[0021] Further technical solutions include at least two limiting angle steels to form multiple hinge points, improving stability; and opening hook holes on the top plate surface to facilitate opening the cover.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0024] (1) The fall-proof manhole cover of this utility model has a fall-proof grating plate under the manhole cover, which increases the fall-proof function of the manhole cover; the fall-proof grating plate is made of steel, which has good rigidity, high strength and good fall protection effect; the fall-proof grating plate and the supporting steel beam are fixed by bolt hinge, which has good anti-theft effect and is easy to clean silt and maintain, and facilitates personnel to pass up and down for inspection;

[0025] (2) The anti-fall manhole cover of this utility model has a reverse-locking movable hook at the end of the anti-fall grating plate, which is fastened under the support, which can effectively solve the problem of flood backflow of the anti-fall grating plate, and at the same time facilitates cleaning of silt and other easy opening.

[0026] (3) The fall-proof manhole cover of this utility model is simple to manufacture, convenient to transport, easy to install and assemble, and easy to use, maintain and replace later. Attached Figure Description

[0027] Figure 1 This is a top view schematic diagram of a fall-prevention manhole cover according to a specific embodiment;

[0028] Figure 2 for Figure 1 A schematic diagram of the radial cross-section;

[0029] Figure 3 for Figure 2 A magnified view of part A;

[0030] Figure 4 This is a schematic diagram of the support structure of the anti-fall grating plate in a specific embodiment;

[0031] Figure 5 This is a structural schematic diagram of a fall arresting grating plate according to a specific embodiment;

[0032] Figure 6 This is a top view of the closed top plate of a fall-prevention manhole cover according to a specific embodiment.

[0033] Figure 7 for Figure 2 Schematic diagram after the top cover is opened;

[0034] Figure 8 for Figure 7 A schematic diagram showing the anti-fall grating after it has been opened.

[0035] In the diagram: 1. Top cover plate; 2. Anti-fall grating plate; 3. Supporting steel beam; 4. Support A; 5. Support B; 6. Base; 7. Opening hinge seat; 8. Fixing bolt; 9. Bolt support tube; 10. Opening hook hole; 11. Supporting angle steel; 12. Square tube grating; 13. Square tube frame; 15. Limiting bracket angle steel; 16. Movable hook; 17. Hook sleeve. Detailed Implementation

[0036] To further understand the contents of this utility model, a detailed description of the utility model is provided in conjunction with the accompanying drawings.

[0037] Example 1

[0038] The anti-fall manhole cover in this embodiment, such as Figure 1 , 2 As shown, the system includes a top cover plate 1, a fall arresting grating plate 2, and an annular base 6 supporting the two cover plates and featuring an annular step. The top cover plate 1 is a circular plate that fits the annular step. One side edge of the top cover plate 1 is hinged to the upper part of the inner wall of the base 6 via a cover hinge 7. Figure 7 As shown, a first-layer flipping structure is formed; the inner wall of the base 6 is horizontally fixed with a supporting steel beam 3 and a support; the fixed frame of the anti-fall grating plate 2 is hinged to the supporting steel beam 3, and the free frame rests on the support in the working state, and can be flipped open around the supporting steel beam 3, as shown. Figure 8 As shown, a second flip structure is formed, with the upper layer being the manhole cover top plate 1 and the lower part being the manhole anti-fall grating plate 2; multiple steps can also be set as needed to form a multi-layer anti-fall grating plate 2 anti-fall structure, which is usually a two-layer structure.

[0039] In this embodiment, the anti-fall manhole cover can be used to upgrade ordinary non-anti-fall manhole covers. The top plate 1, supporting steel beam 3, base 6, cover hinge seat 7, and support can all be made of cast iron; the anti-fall grating plate 2 can be made of hot-dip galvanized or stainless steel, which has high strength, good anti-fall protection effect, simple manufacturing method, and convenient use and maintenance. It can overcome the problems of manhole covers being stolen, lost, washed away by floods, or displaced, and achieve the purpose of preventing pedestrians, bicycles, and electric vehicles from falling and injuring people.

[0040] Example 2

[0041] The anti-fall manhole cover of this embodiment has the same basic structure as that of Embodiment 1, with the following differences or improvements: Figure 1 , 4 As shown, the support is semi-circular for easy insertion. Its ring end is horizontally inserted into the inner wall of the base 6 opposite the supporting steel beam 3. The free frame of the anti-fall grating 2 overlaps the semi-circular surface of the support when in operation, making it easy to open or close. The semi-circular support provides ample space inside the opening, facilitating the passage of maintenance personnel. The frame edge of the free frame of the anti-fall grating 2 is rotatably connected to a movable hook 16 via a hook sleeve 17. The wall of the hook sleeve 17 is fixedly connected to the frame edge of the free frame. The hook rod of the movable hook 16 passes into the hook sleeve 17, with the hook end protruding outside the sleeve, facilitating the use of a hook to secure the support. The support includes at least two supports, forming a multi-point overlap of the anti-fall grating 2, improving its anti-fall stability. When the free frame of the anti-fall grating 2 is in operation, the hook end of the movable hook 16 is hooked tightly inside the semi-circle of the support, solving the problem of the anti-fall grating 2 being overturned by floodwater.

[0042] like Figure 3 , 5 As shown, the fixed frame of the fall arresting grating 2 includes a supporting angle steel 11 and a limiting bracket angle steel 15 fixedly connected to the side of the supporting angle steel 11. After the Π-shaped opening formed by the fixed connection of the supporting angle steel 11 and the limiting bracket angle steel 15 is horizontally opened, it is then fixed by inserting horizontal fixing bolts 8. The fixing bolts 8 and the Π-shaped opening are hinged together with the supporting steel beam 3, which facilitates installation and effectively improves the support stability of the fall arresting grating 2 after it is flipped.

[0043] like Figure 3 As shown, the fixing bolt 8 is fitted with a bolt support tube 9 between the П-shaped openings. When the fixing bolt 8 is inserted and tightened, deformation of the angle steel is avoided.

[0044] The limiting bracket has at least two 15mm angle steel pieces, forming multiple hinge points to improve its stability; such as Figure 6 As shown, the top plate 1 has a cover opening hook hole 10 for easy cover opening.

[0045] Example 3

[0046] The anti-fall manhole cover of this embodiment has the same basic structure as that of Embodiment 2, with the following differences or improvements: Figure 5 As shown, the anti-fall grating 2 is composed of supporting angle steel 11, multiple square tube gratings 12, and three square tube frame frames 13, which are processed and welded together; as Figure 3 As shown, a set of two limiting angle steels 15 are welded to the supporting angle steel 11 to fix and hold the supporting steel beam 3. Below the supporting steel beam 3, holes are drilled on both sides of the limiting angle steel 15 and the supporting angle steel 11, and fixing bolts 8 are installed to form a limiting movable hinge. The rod of the fixing bolt 8 has a bolt support tube 9, which is tightened against the angle steel on both sides to tighten the fixing bolt 8. The materials of the anti-fall grating plate 2 and the bolt support tube 9 can be hot-dip galvanized or stainless steel. The fixing bolt 8 is an ordinary bolt, and the external anti-corrosion can be hot-dip galvanized or made of stainless steel. The supporting steel beam 3 is a cast iron round steel bar. The accessory supporting steel beam 3 and two supports can be welded to the inner wall of the manhole cover base 6, or it can be formed by casting in one piece. In order to facilitate the safety of underground maintenance and access, and to occupy less space in the middle of the opening, the support is a semi-circular, C-shaped or U-shaped cast iron ring, which can avoid scratching personnel and also avoid accidental injury in various adverse situations.

[0047] The fixing hook 16 can slide and rotate horizontally, and is used to hook the bracket after installation to prevent the anti-fall grating 2 from being overturned by flood.

[0048] The top plate 1 has anti-slip textures or patterns, specifications, and logos on its surface.

[0049] The outer wall of the manhole cover base 6 has segmented annular elongated elliptical holes to facilitate civil construction, installation, and anchoring.

[0050] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure and manufacturing steps are not limited to these. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A fall-preventing manhole cover comprising a cover top plate (1), characterized in that: It also includes a fall-preventing grid plate (2) and a base (6), one side edge of the cover top plate (1) is hinged to the upper part of the base (6) through an opening cover hinge seat (7); a supporting steel beam (3) and a supporting seat are fixed on the inner wall of the base (6) in the transverse direction; the fixed frame of the fall-preventing grid plate (2) is hinged to the supporting steel beam (3), and the free frame is placed on the supporting seat in the working state.

2. The fall-protection manhole cover of claim 1, wherein: The supporting seat is in the shape of a half ring, and the ring end is connected to the inner wall of the base (6) opposite to the supporting steel beam (3) in the transverse direction.

3. The fall-protection manhole cover of claim 2, wherein: The free frame of the fall-preventing grid plate (2) is provided with a movable hook (16) and a hook sleeve (17), and the movable hook (16) is buckled on the supporting seat by rotating.

4. The fall-protection manhole cover of claim 3, wherein: The supporting seat includes at least a supporting seat A (4) and a supporting seat B (5); the hook end of the movable hook (16) is hooked on the supporting seat in the working state of the fall-preventing grid plate (2).

5. The fall arrest manhole cover of claim 3, wherein: The fixed frame of the fall-preventing grid plate (2) includes a supporting angle steel (11) and a limiting seat angle steel (15) connected thereto; the two side walls of the Π-shaped opening formed by connecting the supporting angle steel (11) and the limiting seat angle steel (15) are provided with transverse holes, and then are fixed by transversely inserting and screwing fixing bolts (8); the fixing bolts (8) and the Π-shaped opening form a hinge capable of rotating around the supporting steel beam (3).

6. The fall-protection manhole cover of claim 5, wherein: The screw rod body of the fixing bolt (8) between the Π-shaped openings is sleeved with a bolt support pipe (9).

7. The fall arrest manhole cover of claim 5, wherein: The limiting seat angle steel (15) is at least two; the cover top plate (1) is provided with an opening cover hook hole (10) on the plate surface.

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