Municipal sidewalk invisible well lid

Abstract

An invisible well lid for a municipal sidewalk comprises a supporting plate and a well panel, the supporting plate comprises an enclosure frame and a bottom frame which are integrally formed, an annular flexible deformation layer is fixed to the inner wall of the enclosure frame, and the flexible deformation layer comprises a rubber outer wrapping layer and a paraffin-based hot melting material filled in the rubber outer wrapping layer; an annular locking groove is formed in the peripheral side of the well panel, the rubber outer wrapping layer comprises a main body ring and an embedded inner ring, and the embedded inner ring is used for being clamped into the locking groove. The invisible well lid is convenient to disassemble, and surrounding pavement stones are not prone to being damaged during disassembly.

Description

Technical Field

[0001] The present invention belongs to the technical field of manhole covers, and particularly relates to an invisible manhole cover for municipal sidewalks. Background Art

[0002] As a part of urban infrastructure, urban manhole covers can prevent pedestrians and vehicles from falling into underground pipelines, avoid falling accidents caused by the exposure of manhole openings, and protect people's lives and property safety; at the same time, they can also prevent animals from entering underground pipelines and avoid damage to the pipelines or other safety problems. It plays an extremely important role in maintaining the normal operation of the city, protecting public interests, preventing accidents and environmental pollution.

[0003] To beautify the municipal environment, invisible manhole covers are now widely used. An invisible manhole cover is a manhole cover that can be better integrated with the surrounding environment in appearance and is not easily noticeable. It is usually installed in an embedded manner, and the main body of the manhole cover is embedded below the ground to form a flat surface with the ground.

[0004] The use of invisible manhole covers makes the municipal environment more beautiful and less likely to trip pedestrians due to the surface of the manhole cover being higher than the road surface. However, when it is necessary to repair and maintain the pipelines below and remove the invisible manhole cover, since the invisible manhole cover fits well with the surrounding road surface and the gap is small, it is easy to damage the surrounding road surface when flipping the invisible manhole cover, causing damage to the road surface. Summary of the Invention

[0005] The present invention provides an invisible manhole cover for municipal sidewalks to solve the problem that the surrounding road surface is easily damaged when the invisible manhole cover is disassembled.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: An invisible manhole cover for municipal sidewalks includes a support tray and a well panel. The support tray includes an integrally formed surrounding frame and a bottom frame. A ring-shaped flexible deformation layer is fixed to the inner wall of the surrounding frame. The flexible deformation layer includes a rubber outer layer and a paraffin-based hot-melt material filled in the rubber outer layer. An annular locking groove is formed on the periphery of the well panel. The flexible deformation layer includes a main ring and an embedded inner ring, and the embedded inner ring is used to be clamped into the locking groove.

[0007] Further, the melting temperature point of the paraffin-based hot-melt material is between 65°C and 100°C.

[0008] Further, the paraffin-based hot-melt material includes 53% paraffin, 38% industrial beeswax, 3% polyethylene wax, 2% antioxidant, and 1% flame retardant.

[0009] Furthermore, an annular platform is provided in the area of the inner wall of the surrounding frame close to the road surface. A clamping groove is formed by the depression of the outer periphery of the upper surface of the well panel. A metal cover plate is provided between the well panel and the surrounding frame, and the metal cover plate is magnetically fixed to both the annular platform and the clamping groove at the same time.

[0010] Furthermore, a plurality of ferrite permanent magnets are arranged at annular intervals on the annular platform and the clamping groove, and soft iron magnetic attraction sheets are correspondingly arranged on the surface of the metal cover plate.

[0011] Furthermore, a force application groove for a construction worker's hand to be inserted is formed by the inward depression of the surface of the well panel.

[0012] Furthermore, a watering groove is formed on the upper surface of the rubber outer coating, and the elastic deformation ability of the area of the upper surface of the rubber outer coating is greater than that of the remaining parts.

[0013] Furthermore, a support rib framework is laid on the bottom frame, and a plurality of support members are provided between the well panel and the support rib framework, and the support members are evenly arranged on the support rib framework.

[0014] Furthermore, the support member includes a base support rod and an adjustment support rod. One end of the base support rod is fixed to the support rib framework, and the other end is threadedly connected to the adjustment support rod. A limit piece is fixed to the end of the adjustment support rod away from the base support rod, and the limit piece supports the bottom of the well panel.

[0015] Furthermore, a gasket is anchored at the bottom of the well panel, and the limit piece is in smooth contact with the gasket; A plurality of through holes are formed in the well panel, and the through holes are arranged in one-to-one correspondence with the installation positions of the support members.

[0016] The present invention can achieve the following beneficial effects: 1. In this application, a flexible deformation layer is provided on the inner wall of the surrounding frame, so that the flexible deformation layer can surround the periphery of the well panel; a paraffin-based hot-melt material is filled in the flexible deformation layer, so that the paraffin-based hot-melt material can become molten at high temperature and solid at normal temperature; when the paraffin-based hot-melt material is solid, it can cooperate with the locking groove on the periphery of the well panel to lock the position of the well panel; when the well panel needs to be disassembled, the paraffin-based hot-melt material can be made into a molten state, with a deformation amount, thereby providing a rotation space for the rotation of the well panel, and further reducing the damage to the surrounding floor tiles when the well panel is disassembled and rotated.

[0017] 2. By setting up the support rib framework, stable support for the well panel can be achieved. Meanwhile, by setting up support members between the support rib framework and the well panel, fine adjustment of the height and flatness of the well panel can be realized, so as to achieve fine adjustment of the height of the well panel, and further enable the well panel to be set at the same horizontal plane as the surrounding road surface.

[0018] 3. Setting up the metal cover plate can protect the flexible deformation layer and reduce the possibility of the flexible deformation layer being damaged. At the same time, it can also make the invisible manhole cover of the present application more beautiful after construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1 It is a top view of an invisible manhole cover for a municipal sidewalk of the present invention; Figure 2 It is a cross-sectional view of an invisible manhole cover for a municipal sidewalk of the present invention after only installing the support tray; Figure 3 It is a cross-sectional view of an invisible manhole cover for a municipal sidewalk of the present invention; Figure 4 It is Figure 2 an enlarged view of part A in

[0020] In the drawings, the list of components represented by each reference numeral is as follows: 1. Support tray; 11. Enclosure; 111. Ring platform; 12. Bottom frame; 13. Support rib framework; 2. Well panel; 21. Locking groove; 22. Clamping ridge; 23. Force application groove; 24. Gasket; 25. Through hole; 3. Flexible deformation layer; 31. Rubber outer coating; 311. Watering groove; 32. Paraffin-based hot melt material; 33. Main body ring; 34. Embedded inner ring; 4. Metal cover plate; 5. Support member; 51. Basic support rod; 52. Adjusting support rod; 53. Limit piece; 100. Installation platform; 200. Well passage. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0022] Such as Figures 1 to 4As shown in the figure, a concealed manhole cover for a municipal sidewalk includes a support pallet 1 and a well panel 2. The support pallet 1 includes a surrounding frame 11 and a bottom frame 12. The middle part of the bottom frame 12 is hollow and communicates with the well passage 200. Since the concealed manhole cover does not protrude from the road surface, when constructing the concealed manhole cover, it is necessary to expand the excavation surface at the top of the well passage 200 to form an installation platform 100 for the concealed manhole cover. Among them, the surrounding frame 11 is arranged to fit the side wall of the installation platform 100, and the bottom frame 12 is arranged to fit the bottom wall of the installation platform 100. During specific construction, anchor components can be integrally arranged on the outer wall of the support pallet 1. When installing the support pallet 1, the anchor components are anchored into the formation to achieve the fixed and precise installation of the support pallet 1.

[0023] A ring-shaped flexible deformation layer 3 is fixed on the inner wall of the surrounding frame 11. The flexible deformation layer 3 includes a rubber outer layer 31 and a paraffin-based hot-melt material 32 filled in the rubber outer layer 31. The paraffin-based hot-melt material 32 can be in a molten state at a temperature higher than the melting point and in a solid state at a temperature lower than the melting point. Correspondingly, an annular locking groove 21 is formed on the circumferential side of the well panel 2. The rubber outer layer 31 includes a main ring 33 and an embedded inner ring 34. The embedded inner ring 34 is arranged on the inner circle of the main ring 33, and the embedded inner ring 34 is used to be clamped into the locking groove 21.

[0024] Specifically, when installing the well panel 2, the paraffin-based hot-melt material 32 in the rubber outer layer 31 is melted, and then the well panel 2 is placed downward. At this time, the paraffin-based hot-melt material 32 is extruded so that the embedded inner ring 34 has an elastic structure. After the circumferential side of the well panel 2 is all lapped on the installation platform 100, the embedded inner ring 34 is embedded into the locking groove 21. At this time, the molten paraffin-based hot-melt material 32 flows back into the embedded inner ring 34. After the paraffin-based hot-melt material 32 cools and solidifies, the anchoring between the well panel 2 and the support pallet 1 is completed.

[0025] It should be noted that along the direction from the middle to the bottom of the well panel 2, the diameter of the well panel 2 gradually shrinks slightly, so as to form a slightly inclined guiding surface on the side wall of the well panel 2, which is convenient for the well panel 2 to slide downward onto the installation platform 100 to achieve the engagement between the well panel 2 and the flexible deformation layer 3.

[0026] In a preferred embodiment, the melting temperature point of the paraffin-based hot-melt material 32 is between 65°C and 100°C. Therefore, in extremely hot weather, the paraffin-based hot-melt material 32 can still maintain a solid form and is not easily melted. Only when workers need to disassemble the well panel 2, the paraffin-based hot-melt material 32 can be manually heated to make it melt, so as to achieve the separation between the well panel 2 and the flexible deformation layer 3.

[0027] In one embodiment, the components of the paraffin-based hot-melt material 32 include 53% paraffin wax, 38% industrial beeswax, 3% polyethylene wax, 2% antioxidant, and 1% flame retardant. The paraffin wax used is No. 64 fully refined paraffin wax. Adding industrial beeswax can reduce the melting point temperature of the paraffin wax. Adding polyethylene wax can increase the fluidity of the paraffin-based hot-melt material 32, enabling it to be completely melted at high temperatures. Adding antioxidant can extend the service life of the paraffin-based hot-melt material 32 and reduce the embrittlement after long-term use. The paraffin-based hot-melt material 32 formed according to the above ratio can meet the above functional requirements, and then realize the position locking and unlocking of the well panel 2 through the melting and solidification of the paraffin-based hot-melt material 32.

[0028] Furthermore, an annular watering groove 311 is formed on the upper surface of the rubber outer layer 31. When maintenance personnel need to remove the well panel 2, they can continuously pour 100 °C hot water into the watering groove 311 until the paraffin-based hot-melt material 32 melts. At this time, the well panel 2 can be pried upward. When the well panel 2 is pried upward and overturned, since the well panel 2 of the invisible manhole cover is on the same horizontal plane as the surrounding road bricks and the spacing is small, it is easy to interfere with the surrounding road bricks during rotation and opening, and then crush the surrounding road bricks; the flexible deformation layer 3 is provided to provide a rotation space for the overturning of the well panel 2, so that the well panel 2 is not easily interfered with by the surrounding road bricks when opening, so as to reduce the impact on the surrounding road bricks when the invisible manhole cover is opened.

[0029] To facilitate the application of force by maintenance personnel, a force application groove 23 for the hands of construction personnel to be inserted is formed by inward depression on the surface of the well panel 2. At the same time, the elastic deformation ability of the upper surface area of the rubber outer layer 31 is greater than that of the remaining parts. Therefore, when extruding the molten paraffin-based hot-melt material 32, the top of the rubber outer layer 31 can be deformed to provide space for the flow of the paraffin-based hot-melt material 32.

[0030] After the well panel 2 is installed, a metal cover plate 4 is further provided between the well panel 2 and the support pallet 1. The metal cover plate 4 is used to cover above the flexible deformation layer 3. Specifically, an annular platform 111 is provided in the height area of the inner wall of the surrounding frame 11 close to the road surface. A clamping groove 22 is formed by outward depression on the periphery of the upper surface of the well panel 2. The metal cover plate 4 is lapped on the clamping groove 22 and the annular platform 111; a plurality of ferrite permanent magnets are arranged at annular intervals on the annular platform 111 and the clamping groove 22, and soft iron magnetic sheets are correspondingly arranged on the plate surface of the metal cover plate 4, so that the metal cover plate 4 is magnetically fixed to the annular platform 111 and the clamping groove 22 at the same time. By providing the metal cover plate 4 to protect the flexible deformation layer, on the one hand, it can reduce the artificial damage to the flexible deformation layer 3, on the other hand, it can reduce the pollution and erosion of the external environment to the flexible deformation layer 3, and furthermore, it also makes the outer surface of the invisible manhole cover of the present application more beautiful, flat and more integrated with the surrounding environment.

[0031] When removing the well panel 2, it is necessary to first remove the metal cover plate 4. When removing the metal cover plate 4, a manual degaussing crowbar can be equipped. The main body of the degaussing crowbar is a U-shaped low-carbon steel, and a rotatable neodymium iron boron strong magnetic block is embedded at the front end of the degaussing crowbar. During disassembly, the strong magnetic block of the crowbar is brought close to the ferrite permanent magnet on the clamping ridge 22, and the crowbar is quickly rotated to reverse the magnetic poles, temporarily canceling the suction force, so that the metal cover plate 4 can be removed. The operation is convenient and fast. When designing the ferrite permanent magnets on the annular platform 111 and the clamping ridge 22, and the soft iron magnetic attracting sheet on the metal cover plate 4, one set of mutually attracting ferrite permanent magnets and soft iron magnetic attracting sheets can be used as the main locking points to enhance the suction force; the suction forces of the remaining ferrite permanent magnets and soft iron magnetic attracting sheets are weakened and used as auxiliary locking points. When using the degaussing crowbar to remove the well panel 2, it can act on the main locking points, making it easier to lift the metal cover plate 4.

[0032] According to the above installation and fixing method, it is not easy for passers-by on the road to disassemble the metal cover plate 4, with strong safety and beautiful appearance. When reinstalling the well panel 2, only need to directly place the metal cover plate 4 against the clamping ridge 22, and the soft iron magnetic attracting sheet will be automatically magnetized and adsorbed by the permanent magnet, and the fixing is completed when hearing a "click" sound.

[0033] A support rib framework 13 is laid on the bottom frame 12. The support rib framework 13 is a mesh structure and can be formed by processing square steel. The support rib framework 13 is lapped on the bottom frame 12, and the ends are abutted against the surrounding frame 11 on the periphery. When maintenance personnel need to descend into the well shaft 200 for maintenance, first remove the well panel 2, and then vertically lift the support rib framework 13, and then the well operation can be carried out.

[0034] A plurality of support members 5 are arranged between the well panel 2 and the support rib framework 13. The support members 5 are evenly arranged on the well panel 2 to realize the stable support of the well panel 2.

[0035] The support member 5 includes a base support rod 51 and an adjustment support rod 52. One end of the base support rod 51 passes through the support rib framework 13 and is fixed to the support rib framework 13, and the other end is threadedly connected to the adjustment support rod 52. A limit piece 53 is arranged at the end of the adjustment support rod 52 away from the base support rod 51. The limit piece 53 is supported on the bottom of the well panel 2. The limit piece 53 is in the shape of a circular ring sheet and the upper surface is a plane. The middle part of the limit piece 53 is thicker and the edge is thinner to realize the stable support of the well panel 2. The end face of the adjustment support rod 52 is in the same plane as the upper surface of the limit piece 53, and a rotation card slot is formed on the end face of the adjustment support rod 52. Inserting a turning rod into the rotation card slot can drive the adjustment support rod 52 to rotate. The adjustment support rod 52 rotates threadedly relative to the base support rod 51, thereby realizing the adjustment of the height of the support member 5 to adjust the levelness and overall height of the well panel 2.

[0036] Furthermore, a plurality of through holes 25 for the rotating rod to extend into are provided on the well panel 2, and a gasket 24 is pre-buried at the bottom of the well panel 2, and the limit plate 53 is in smooth contact with the gasket 24 to reduce the friction resistance of the rotation of the adjustment support rod 52.

[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An invisible manhole cover for a municipal sidewalk, characterized in that: It includes a supporting pallet (1) and a well panel (2). The supporting pallet (1) includes an integrally formed surrounding frame (11) and a bottom frame (12). A ring-shaped flexible deformation layer (3) is fixed to the inner wall of the surrounding frame (11). The flexible deformation layer (3) includes a rubber outer layer (31) and a paraffin-based hot melt material (32) filled in the rubber outer layer (31). An annular locking groove (21) is formed on the periphery of the well panel (2). The flexible deformation layer (3) includes a main body ring (33) and an embedded inner ring (34). The embedded inner ring (34) is used to be clamped into the locking groove (21).

2. The invisible manhole cover for the municipal sidewalk according to claim 1, characterized in that: The melting temperature point of the paraffin-based hot melt material (32) is between 65°C and 100°C.

3. The invisible manhole cover for the municipal sidewalk according to claim 2, characterized in that: The paraffin-based hot melt material (32) includes 53% paraffin, 38% industrial beeswax, 3% polyethylene wax, 2% antioxidant, and 1% flame retardant.

4. The invisible manhole cover for a municipal sidewalk according to claim 1, wherein: An annular platform (111) is arranged in the area of the inner wall of the surrounding frame (11) close to the road surface. A clamping ridge (22) is formed by recessing the periphery of the upper surface of the well panel (2). A metal cover plate (4) is arranged between the well panel (2) and the surrounding frame (11). The metal cover plate (4) is magnetically fixed to both the annular platform (111) and the clamping ridge (22) at the same time.

5. The invisible manhole cover for municipal sidewalk according to claim 4, characterized in that: A plurality of ferrite permanent magnets are arranged at intervals in a ring on the annular platform (111) and the clamping ridge (22). Soft iron magnetic attraction sheets are correspondingly arranged on the surface of the metal cover plate (4).

6. The invisible manhole cover for the municipal sidewalk according to claim 1, characterized in that: A force application groove (23) for a construction worker's hand to be inserted is formed by inwards recessing the surface of the well panel (2).

7. The invisible manhole cover for a municipal sidewalk according to claim 1, wherein: A watering groove (311) is formed on the upper surface of the rubber outer layer (31), and the elastic deformation ability of the area of the upper surface of the rubber outer layer (31) is greater than that of the rest of the parts.

8. The invisible manhole cover for a municipal sidewalk according to claim 1, characterized in that: A support rib framework (13) is laid on the bottom frame (12). A plurality of support members (5) are arranged between the well panel (2) and the support rib framework (13). The support members (5) are evenly arranged on the support rib framework (13).

9. A concealed manhole cover for a municipal sidewalk according to claim 8, characterized in that: The support member (5) includes a base support rod (51) and an adjusting support rod (52). One end of the base support rod (51) is fixed to the support rib framework (13), and the other end is threadedly connected to the adjusting support rod (52). A limiting piece (53) is fixed to the end of the adjusting support rod (52) away from the base support rod (51). The limiting piece (53) supports the bottom of the well panel (2).

10. A kind of invisible manhole cover for municipal sidewalk according to claim 9, characterized in that: A gasket (24) is anchored to the bottom of the well panel (2). The limiting piece (53) is in smooth contact with the gasket (24). A plurality of through holes (25) are formed in the well panel (2). The through holes (25) are arranged in one-to-one correspondence with the installation positions of the support members (5).

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