Invisible well lid capable of preventing temperature stress

Abstract

The utility model discloses an anti-temperature stress invisible well lid, which relates to the technical field of invisible well lids and comprises an outer frame and an inner frame, the outer wall of the inner frame is attached to the inner wall of the outer frame, the inner frame is in sliding connection with the outer frame, a boss is fixedly arranged on the lower portion of the inner wall of the outer frame in the circumferential direction, a bottom plate is fixedly arranged at the bottom end of the inner frame, and a filling groove is formed between the inner wall of the inner frame and the top end of the bottom plate. The filling groove is sequentially filled with a concrete layer and a pavement panel layer from bottom to top, a plurality of limiting rings are sequentially and fixedly arranged at the bottom end of the inner wall of the filling groove from outside to inside, and the outer wall of the limiting ring with the largest diameter is fixedly connected with the inner wall of the inner frame. External force on the bottom plate and the inner wall of the inner frame is evenly distributed through the arrangement of the limiting ring, stress concentration caused by temperature changes is reduced, the bottom plate is protected against the influence of temperature fluctuation, meanwhile, the limiting ring improves the structural stability of the bottom plate and the inner wall of the inner frame, and the stability of the shape and the size can be kept when the temperature changes.

Description

Technical Field

[0001] The utility model relates to the technical field of invisible manhole covers, in particular to an invisible manhole cover capable of preventing temperature stress. Background Art

[0002] As an important urban infrastructure, the performance of invisible manhole covers will be affected to a certain extent by temperature stress.

[0003] Here are some of the things that can happen to invisible manhole covers when they are exposed to temperature stress:

[0004] 1. Deformation: Temperature changes may cause the invisible manhole cover and its supporting structure to deform, affecting its normal function and safety;

[0005] 2. Cracks: The concentration of temperature stress may cause cracks in invisible manhole covers. These cracks not only affect the appearance, but may also reduce the durability and safety of the structure;

[0006] 3. Changes in material properties: Temperature changes may affect the performance of invisible manhole cover materials. For example, stainless steel may soften at high temperatures and become brittle at low temperatures. Utility Model Content

[0007] The purpose of the utility model is to provide an invisible manhole cover that is resistant to temperature stress, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: an invisible manhole cover that is resistant to temperature stress, comprising an outer frame and an inner frame whose outer wall is fitted and slidably connected to the inner wall of the outer frame, a boss is fixedly arranged on the lower part of the inner wall of the outer frame along the circumferential direction, a bottom plate is fixedly arranged on the bottom end of the inner frame, a filling groove is formed between the inner wall of the inner frame and the top end of the bottom plate, a concrete layer and a paving panel layer are arranged in sequence from bottom to top in the filling groove, a plurality of limiting rings are fixedly arranged in sequence from the outside to the inside at the bottom end of the inner wall of the filling groove, and the outer wall of the limiting ring with the largest diameter is fixedly connected to the inner wall of the inner frame.

[0009] Furthermore, the inner frame is hollow, and an anti-stress array is evenly arranged in the inner frame. The anti-stress array is elastic and has a honeycomb structure in its transverse cross section.

[0010] Furthermore, the outer frame located on the boss is hollow.

[0011] Furthermore, the longitudinal cross-section of the inner wall of the outer frame is corrugated.

[0012] Furthermore, a rubber gasket is bonded to the inner wall of the outer frame located on the boss, and the rubber gasket is arranged around the inner wall of the outer frame.

[0013] The beneficial effects achieved by the utility model are:

[0014] 1. The limiting ring is set to evenly distribute the external force on the bottom plate and the inner wall of the inner frame, reduce the stress concentration caused by temperature changes, and protect the bottom plate from temperature fluctuations. At the same time, the limiting ring increases the structural stability of the bottom plate and the inner wall of the inner frame, so that it can maintain the stability of shape and size when the temperature changes.

[0015] 2. The setting of the anti-stress array can significantly improve the inner frame's ability to resist temperature stress. The elastic structure of the anti-stress array can deform when subjected to temperature stress, thereby absorbing and dispersing temperature stress and preventing damage caused by stress concentration. The hollow structure of the inner frame and the honeycomb structure of the anti-stress array are helpful to improve the thermal conductivity, so that the inner frame can dissipate heat more evenly when the temperature changes, reducing the thermal stress caused by temperature difference.

[0016] 3. The corrugated design of the longitudinal section of the inner wall of the outer frame enables the outer frame to better adapt to deformation when subjected to temperature changes, thereby reducing the stress caused by temperature changes. At the same time, the corrugated design can provide more expansion space when the temperature changes, which helps to reduce the stress concentration caused by thermal expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure decomposition of an invisible manhole cover for preventing temperature stress in an embodiment;

[0018] Figure 2 is a schematic transverse cross-sectional view of an inner frame in an embodiment;

[0019] Figure 3 Schematic diagram of the longitudinal section of the outer frame in the embodiment. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, the utility model discloses an invisible manhole cover for preventing temperature stress, comprising: an outer frame 1 and an inner frame 2 whose outer wall is fitted and slidably connected to the inner wall of the outer frame 1, a boss 11 is fixedly arranged on the lower part of the inner wall of the outer frame 1 along the circumferential direction, a bottom plate 21 is fixedly arranged on the bottom end of the inner frame 2, a filling groove 22 is formed between the inner wall of the inner frame 2 and the top end of the bottom plate 21, a concrete layer 3 and a paving panel layer 4 are arranged in sequence from bottom to top in the filling groove 22, a plurality of limiting rings 23 are fixedly arranged in sequence from the outside to the inside at the bottom end of the inner wall of the filling groove 22, and the outer wall of the limiting ring 23 with the largest diameter is fixedly connected to the inner wall of the inner frame 2.

[0022] Based on the above structure, Figure 1As shown, the limiting ring is provided to evenly distribute the external force on the bottom plate 21 and the inner wall of the inner frame 2, thereby reducing the stress concentration caused by temperature changes and protecting the bottom plate 21 from temperature fluctuations. At the same time, the limiting ring 21 increases the structural stability of the bottom plate 21 and the inner wall of the inner frame 2, so that the shape and size stability can be maintained when the temperature changes.

[0023] Further, such as Figure 2 As shown, the inner frame 2 is hollow, and an anti-stress array 24 is evenly arranged in the inner frame 2. The anti-stress array 24 is elastic, and the transverse cross-section is a honeycomb structure. The setting of the anti-stress array 24 can significantly improve the temperature stress resistance of the inner frame 2. The elastic structure of the anti-stress array 24 can deform when subjected to temperature stress, thereby absorbing and dispersing temperature stress and preventing damage caused by stress concentration. The hollow structure of the inner frame 2 and the honeycomb structure of the anti-stress array 24 are both helpful to improve the thermal conductivity performance, so that the inner frame 2 can dissipate heat more evenly when the temperature changes, thereby reducing the thermal stress caused by temperature difference.

[0024] Further, such as Figure 3 As shown, the outer frame 1 located on the boss 11 is hollow. The hollow structure helps to improve the thermal conductivity of the outer frame 1, so that the outer frame 1 can dissipate heat more evenly when the temperature changes, reducing the thermal stress caused by the temperature difference.

[0025] Further, such as Figure 3 As shown, the longitudinal cross-section of the inner wall of the outer frame 1 is corrugated. The corrugated design enables the outer frame 1 to better adapt to deformation when subjected to temperature changes, thereby reducing the stress caused by temperature changes. At the same time, the corrugated design can provide more expansion space when the temperature changes, which helps to reduce the stress concentration caused by thermal expansion and contraction.

[0026] Further, such as Figure 1 and 3 As shown, a rubber gasket 12 is bonded to the inner wall of the outer frame 1 located on the boss 11. The rubber gasket 12 is arranged around the inner wall of the outer frame 1. The rubber gasket 12 has a good thermal expansion coefficient and can provide a buffer when the temperature changes, thereby reducing the stress concentration caused by thermal expansion and contraction of the inner frame 2.

[0027] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An invisible manhole cover for preventing temperature stress, comprising an outer frame (1) and an inner frame (2) whose outer wall is fitted and slidably connected to the inner wall of the outer frame (1), wherein a boss (11) is fixedly arranged on the lower part of the inner wall of the outer frame (1) along the circumferential direction, a bottom plate (21) is fixedly arranged on the bottom end of the inner frame (2), a filling groove (22) is formed between the inner wall of the inner frame (2) and the top end of the bottom plate (21), and a concrete layer (3) and a paving panel layer (4) are arranged in sequence from bottom to top in the filling groove (22), characterized in that: A plurality of limiting rings (23) are fixedly arranged in sequence from the outside to the inside at the bottom end of the inner wall of the filling groove (22), and the outer wall of the limiting ring (23) with the largest diameter is fixedly connected to the inner wall of the inner frame (2).

2. The invisible manhole cover for preventing temperature stress according to claim 1, characterized in that: The inner frame (2) is hollow, and an anti-stress array (24) is evenly arranged in the inner frame (2). The anti-stress array (24) is elastic and has a honeycomb structure in its transverse cross section.

3. The invisible manhole cover for preventing temperature stress according to claim 2, characterized in that: The outer frame (1) located on the boss (11) is hollow.

4. The invisible manhole cover for preventing temperature stress according to claim 3 is characterized in that: The longitudinal cross section of the inner wall of the outer frame (1) is arranged in a corrugated manner.

5. An invisible manhole cover for preventing temperature stress according to any one of claims 1 to 4, characterized in that: A rubber gasket (12) is bonded to the inner wall of the outer frame (1) located on the boss (11), and the rubber gasket (12) is arranged around the inner wall of the outer frame (1).

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