Prefabricated concrete well lid

Abstract

The utility model relates to the technical field of municipal engineering, and discloses a prefabricated concrete well lid which comprises a well lid body, and the well lid body comprises a base and a lid body which are prefabricated by concrete; at least three grooves are formed in the edge of the lower surface of the cover body, and at least three protruding blocks matched with the grooves are arranged at the bottom end of the inner wall of the base. The groove is formed in the edge of the lower surface of the cover body and matched with the protruding block at the bottom end of the inner wall of the base, after the well lid is installed, the protruding block is embedded into the groove, horizontal displacement of the well lid is effectively limited, the possibility that the well lid moves relative to a well mouth under the conditions of vehicle rolling, ground vibration and the like is greatly reduced, and the well lid is safe and reliable. The well lid has the advantages that gaps between the well lid and a well mouth are reduced, extra noise generated by the gaps is avoided, sundries are prevented from falling into a well, normal operation of underground facilities is guaranteed, hidden danger of traffic safety endangering due to tilting of the well lid is eliminated, and stability and safety of the well lid in daily use are improved.

Description

Technical Field

[0001] This utility model relates to the field of municipal engineering technology, and more specifically to a precast concrete manhole cover. Background Technology

[0002] Manhole covers, as an important component of urban infrastructure, are widely used in roads, residential areas, squares, and other locations to cover the entrances and exits of underground passages such as sewers and cable trenches, serving a protective and safety function. Existing manhole covers typically employ a relatively simple structural design, mostly made of a single metal or concrete material. The connection between the cover and the manhole opening relies primarily on simple planar contact or a few fixing devices, lacking effective limiting and stabilizing measures. Under prolonged exposure to vehicle traffic and ground vibrations, manhole covers are prone to relative displacement with the manhole opening, resulting in gaps between them. This not only generates additional noise but also allows debris to fall into the manhole, affecting the normal operation of underground facilities, and may even cause the cover to lift up, endangering traffic safety.

[0003] Therefore, in view of this, we will study and improve the existing structure and its shortcomings, and provide a precast concrete manhole cover in order to achieve a more practical value. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a precast concrete manhole cover to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a precast concrete manhole cover, comprising a manhole cover body, the manhole cover body comprising a base and a cover body made of precast concrete; the lower surface edge of the cover body is provided with at least three grooves, and the bottom of the inner wall of the base is provided with at least three protrusions that match the grooves; when the cover body is installed on the base, the protrusions are embedded in the grooves, restricting the horizontal displacement of the manhole cover; a rubber retaining plate is provided in the groove, and when the protrusions are embedded in the groove, the retaining plate is in close contact with the protrusions, providing a certain elastic resistance, further preventing the manhole cover from displacing when subjected to vibration or external force.

[0006] Furthermore, the cover body is equipped with a sound insulation layer to effectively absorb the noise generated when vehicles pass by, reduce noise pollution around the manhole cover, and improve the tranquility of the surrounding environment.

[0007] Furthermore, the sound insulation layer is made of at least one sound-absorbing material selected from glass wool and rock wool.

[0008] Furthermore, the cover is provided with at least two grips. The shape and size of the grips are designed in accordance with ergonomic principles, making it easy for operators to grip and apply force, thus facilitating the opening of the cover. The edges of the grips are rounded to avoid scratching the operator's hands.

[0009] Furthermore, the upper surface of the cover is provided with anti-slip texture. The anti-slip texture adopts a crisscross grid design to increase the friction on the upper surface of the cover, preventing pedestrians or vehicles from slipping or falling due to the wet surface when passing over the manhole cover, thereby further improving the safety of the manhole cover.

[0010] Furthermore, the outer surface of the cover is coated with one or more layers of anti-corrosion coating. The anti-corrosion coating is made of epoxy resin material, which has good chemical corrosion resistance and weather resistance. It can effectively prevent the cover from being eroded by acid rain, sewage and other corrosive substances, extend the service life of the manhole cover, and at the same time maintain the cleanliness and beauty of the manhole cover, reducing maintenance costs and frequency.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model features a groove on the lower edge of the cover body that matches a protruding block at the bottom of the inner wall of the base. After the manhole cover is installed, the protruding block is embedded in the groove, effectively limiting the horizontal displacement of the manhole cover. This greatly reduces the possibility of relative displacement between the manhole cover and the manhole opening under vehicle pressure and ground vibration, and reduces the occurrence of gaps between the manhole cover and the manhole opening. This avoids additional noise caused by gaps, prevents debris from falling into the manhole, ensures the normal operation of underground facilities, eliminates the hidden danger of the manhole cover tilting up and endangering traffic safety, and improves the stability and safety of the manhole cover in daily use.

[0013] 2. This utility model, by setting a sound insulation layer inside the cover and using sound-absorbing materials such as glass wool or rock wool, can effectively absorb the noise generated when vehicles pass by, significantly reduce noise pollution in the surrounding environment of the manhole cover, create a quiet and comfortable space for nearby residents and pedestrians, and improve the quality of life and travel environment.

[0014] The grip is ergonomically designed and rounded, making it easy for operators to open the manhole cover. This not only improves work efficiency but also prevents hand injuries, enhancing the convenience and safety of operation.

[0015] The crisscrossing grid-like anti-slip texture on the surface of the cover greatly increases friction, effectively preventing pedestrians from slipping and vehicles from skidding. Especially in inclement weather conditions, it ensures the safety of passing personnel and vehicles and reduces the risk of accidents.

[0016] In addition, the epoxy resin anti-corrosion coating on the outer surface of the manhole cover has good chemical corrosion resistance and weather resistance, which can resist acid rain, sewage and other corrosive substances, and extend the service life of the manhole cover. Attached Figure Description

[0017] Figure 1 This is a three-dimensional disassembled schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 3 This is a three-dimensional schematic diagram of the base structure of this utility model.

[0020] Figure 4 This is a three-dimensional schematic diagram of the manhole cover body structure of this utility model.

[0021] Figure 5 For the present utility model Figure 4 A magnified view of the structure at point A in the middle.

[0022] In the diagram: 100, main body of the manhole cover; 110, base; 111, cover body; 112, protrusion; 113, groove; 114, clamping plate; 115, gripping part. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] This utility model provides a precast concrete manhole cover, the main part of which is the manhole cover body 100, which is precast from concrete and includes a base 110 and a cover body 111. At least three grooves 113 are provided on the lower surface edge of the cover body 111, and at least three protrusions 112 are provided on the bottom inner wall of the base 110. When the cover body 111 is installed on the base 110, the protrusions 112 are embedded in the grooves 113, thereby limiting the horizontal displacement of the manhole cover and ensuring its stability during daily use. Furthermore, a rubber retaining plate 114 is provided in the groove 113. When the protrusions 112 are embedded in the groove 113, the retaining plate 114 is in close contact with the protrusions 112, and the elasticity of the rubber generates a certain resistance, further preventing the manhole cover from shifting when subjected to vibration or external force, thus ensuring the safe use of the manhole cover.

[0025] Working principle:

[0026] When installing the manhole cover, the cover body 111 is placed on top of the base 110, aligning the groove 113 on the lower edge of the cover body 111 with the protrusion 112 at the bottom of the inner wall of the base 110. As the cover body 111 gradually falls, the protrusion 112 naturally embeds into the groove 113. This embedding structure limits the manhole cover in the horizontal direction, effectively preventing displacement when the manhole cover is subjected to horizontal external forces (such as lateral friction generated by vehicle movement, horizontal shaking caused by ground vibration, etc.).

[0027] Meanwhile, the rubber retaining plate 114 inside the groove 113 is in close contact with the protrusion 112. When the manhole cover is subjected to vibration or external force and tends to shift, the retaining plate 114 will generate a reaction force due to the elastic properties of its own rubber, further resisting this displacement tendency, thereby providing additional stability for the manhole cover, ensuring that the manhole cover remains stable on the manhole opening, preventing it from shifting, shaking or falling off the manhole opening, and ensuring the safety of the facilities under the manhole cover and the normal operation of ground traffic.

[0028] Example 2:

[0029] Example 2 differs from Example 1 in several ways. A sound-insulating layer is added inside the cover 111. This layer effectively absorbs noise generated by passing vehicles, reducing noise pollution around the manhole cover and improving the quietness of the surrounding environment. The sound-insulating layer is made of at least one sound-absorbing material, such as glass wool or rock wool, and has excellent sound absorption performance. Simultaneously, at least two grips 115 are provided on the cover 111. Their shape and size are designed according to ergonomic principles, making it convenient for operators to grip and apply force, thus facilitating the opening of the cover 111. Furthermore, the edges of the grips 115 are rounded to prevent scratching the operator's hands, reflecting a human-centered design. In addition, the upper surface of the cover 111 has anti-slip textures, using a crisscrossing grid design. This greatly increases the friction of the upper surface of the cover 111, effectively preventing pedestrians or vehicles from slipping or sliding due to the wet surface when passing over the manhole cover, further enhancing the safety of the manhole cover. In addition, the outer surface of the cover 111 is coated with one or more layers of anti-corrosion coating. This coating is made of epoxy resin material, which has excellent chemical corrosion resistance and weather resistance. It can effectively resist the erosion of the cover 111 by acid rain, sewage and other corrosive substances, extend the service life of the manhole cover, maintain the cleanliness and beauty of the manhole cover, reduce maintenance costs and frequency, and enable the manhole cover to maintain good performance and appearance during long-term use, playing an important role in the stable operation of urban infrastructure.

[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precast concrete manhole cover comprising a manhole cover body (100), characterized in that: The well lid body (100) comprises a base (110) and a cover body (111) prefabricated by concrete; the lower surface edge of the cover body (111) is provided with at least three grooves (113), the inner wall bottom end of the base (110) is provided with at least three convex blocks (112) matched with the grooves (113), when the cover body (111) is installed on the base (110), the convex blocks (112) are embedded in the grooves (113), and the grooves (113) are provided with clamping plates (114) made of rubber material, when the convex blocks (112) are embedded in the grooves (113), the clamping plates (114) are in close contact with the convex blocks (112).

2. A precast concrete manhole cover according to claim 1, characterised in that: The cover body (111) is internally provided with a sound insulation layer.

3. A precast concrete manhole cover according to claim 2, characterised in that: The sound insulation layer is made of at least one sound-absorbing material of glass wool and rock wool.

4. A precast concrete manhole cover according to claim 1, characterized in that: At least two holding portions (115) are formed on the cover body (111), and the edges of the holding portions (115) are rounded.

5. A precast concrete manhole cover according to claim 1, wherein: The upper surface of the cover body (111) is provided with anti-skid lines, and the anti-skid lines are designed in a grid shape in a longitudinal and transverse interlaced manner.

6. A precast concrete manhole cover according to claim 1, wherein: The outer surface of the cover body (111) is coated with one or more anticorrosion coating layers made of epoxy resin material.

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