High impact composite resin well lid
By using a composite frame structure and multi-layer material design, the problem of poor impact resistance of manhole covers has been solved, achieving high impact resistance, shock absorption and noise reduction, good wear resistance, adaptability to complex shapes and size requirements, and meeting the needs of high-performance manhole covers for municipal roads.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGXING YONGSHENG ROUTE FACILITIES CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-16
Smart Images
Figure CN224363352U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal road facilities, specifically a high-impact composite resin manhole cover. Background Technology
[0002] Current Status of Manhole Cover Development: Manhole covers are widely used in road administration, mainly distributed in municipal drainage, water supply networks, and power cable wells, and are an important part of urban infrastructure. Traditional manhole covers are prone to settling, damage, and loss, affecting road smoothness and driving safety, and may even cause accidents. In recent years, smart manhole covers have gradually emerged. By installing sensors and communication modules, they can monitor the status and location of the manhole cover, as well as information such as the water level and gas concentration underground. They can immediately issue an alarm in case of abnormalities, improving management efficiency and safety.
[0003] Regarding the current state of development, various regions are actively promoting the rectification and intelligent transformation of manhole covers. For example, Shanghai has carried out a special campaign to address the issue of uneven manhole cover heights, adopting automatically adjustable manhole covers and standardizing their types and materials; Weifang launched a smart manhole cover project to achieve intelligent management of some sewage manhole covers in the urban area. Meanwhile, some cities have established a safety net mechanism for manhole cover management to promptly address issues such as damage and missing covers, ensuring the safety of citizens. However, manhole cover management still faces challenges, such as numerous ownership units, difficulties in coordination, and slow progress in the intelligent transformation of manhole covers in some areas. In the future, with the development of technologies such as the Internet of Things and big data, manhole cover management will become more refined and intelligent.
[0004] For example, the Chinese utility model patent application with application number 201510588393.7 discloses an ultra-high performance concrete honeycomb composite manhole cover, which is composed of a reinforced UHPC honeycomb structure and a concrete frustum. The UHPC contains reinforcing and toughening materials such as steel fibers and is reinforced with a steel skeleton, fully utilizing the strength of both UHPC and steel reinforcement, reducing material usage, and achieving mechanical properties comparable to ductile iron manhole covers, with superior durability and other properties. However, it has some drawbacks: the high cost due to the large amount of UHPC and steel reinforcement limits its application range; the complex production process requires high-quality equipment and processes, resulting in low production efficiency; the honeycomb structure limits the shape and size, making it difficult to meet complex requirements, and the manhole cover is heavy, making installation and transportation inconvenient; the surface steel fibers are at risk of corrosion in humid and corrosive environments, affecting durability and appearance, and its environmental adaptability needs improvement.
[0005] However, the applicant discovered that existing municipal manhole covers are mostly made of materials such as cast iron or concrete, which have problems such as poor impact resistance, easy damage, high noise levels, and low production efficiency. Therefore, a new type of manhole cover is needed that can meet higher impact resistance requirements.
[0006] This application provides a high-impact composite resin manhole cover, which has higher impact resistance than existing manhole cover products. Utility Model Content
[0007] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a vacuum pump with bearings that can protect the electronic components set on the rear end cover of the generator while also ensuring the good heat dissipation required by the generator.
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A high-impact composite resin manhole cover includes a composite frame with a cavity. A high-impact resin material layer that adheres to the inner wall of the composite frame is disposed within the cavity. The cavity contains an outer high-strength glass fiber reinforced composite material layer, a middle metal skeleton layer, and an inner elastic rubber material layer.
[0010] As a preferred structure, an adhesive layer is provided between adjacent high-strength glass fiber reinforced composite material layers, metal skeleton layers, or elastic rubber material layers.
[0011] As a preferred structure, the metal skeleton layer has a wave-shaped structure, comprising alternating sinking sections and undulating sections.
[0012] As a preferred structure, the metal skeleton layer is made of a high-strength alloy material.
[0013] As a preferred structure, the ratio of the lateral lengths of the sunken section and the undulating section is between 1:1 and 1:1.5.
[0014] As a preferred structure, the ratio of the numerical height of the sinking section and the undulating section is between 1:1 and 1:1.5.
[0015] As a preferred structure, the surface of the manhole cover body is provided with an anti-slip structure.
[0016] Beneficial effects
[0017] High impact resistance: Through the design of the composite frame, combined with the synergistic effect of the high-strength glass fiber reinforced composite material layer, the metal skeleton layer and the elastic rubber material layer, as well as the impact modifier added to the high impact-resistant resin material layer, the impact resistance of the manhole cover is greatly improved, enabling it to withstand frequent rolling and impact from vehicles, effectively preventing damage to the manhole cover and extending its service life.
[0018] Excellent shock absorption and noise reduction performance: The elastic rubber material layer can effectively absorb and buffer the impact energy generated during vehicle operation, reduce the collision noise between the manhole cover and the vehicle tires, and create a quieter environment for pedestrians and surrounding residents.
[0019] In summary, the high-impact composite resin manhole cover of the present invention has many advantages such as high impact resistance, wear resistance, aging resistance, shock absorption and noise reduction, good sealing performance, and anti-slip properties. It can meet the high-performance requirements of manhole covers in municipal roads and other places, and has broad application prospects. Attached Figure Description
[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a cross-sectional schematic diagram of the internal structure of a high-impact composite resin manhole cover.
[0022] Figure 2 A cross-sectional diagram of the internal structure of a high-impact composite resin manhole cover with an added adhesive layer. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0025] This embodiment provides a high-impact composite resin manhole cover. The manhole cover includes a composite frame with a closed cavity structure inside. Within the cavity, a high-impact resin material layer (e.g., polyurethane resin with added toughening agents such as POE or EPDM) is filled and adheres to the inner wall of the composite frame. The composite frame itself is composed of multiple layers of functional materials, specifically including: an outermost high-strength glass fiber reinforced composite material layer (e.g., a GFRP layer with a glass fiber content ≥60wt%), a middle metal skeleton layer, and an innermost elastic rubber material layer facing the cavity (e.g., EPDM or polyurethane rubber). As a preferred connection structure, an adhesive layer (e.g., epoxy resin adhesive or polyurethane adhesive) is provided between adjacent high-strength glass fiber reinforced composite material layers, metal skeleton layers, and elastic rubber material layers to ensure a strong bond between the layers.
[0026] In this embodiment, the metal skeleton layer is made of high-strength alloy material (e.g., Q345 low-alloy high-strength structural steel or 304 stainless steel) and designed as a wave-shaped structure with specific geometric characteristics. This wave-shaped structure consists of alternating sinking and undulating sections, forming a continuous peak-and-trough pattern. The ratio of the lateral length of the sinking section to the undulating section is controlled within the range of 1:1 to 1:1.5 (e.g., a sinking section with a lateral length of 10mm corresponds to an undulating section with a lateral length of 10mm to 15mm), and the ratio of the numerical height (i.e., trough depth to peak height) of the sinking and undulating sections is also controlled within the range of 1:1 to 1:1.5 (e.g., a sinking section with a depth of 5mm corresponds to an undulating section with a height of 5mm to 7.5mm). This specific ratio of wave-shaped structure design effectively enhances the overall stiffness and bending resistance of the metal skeleton layer, while providing ample deformation space to absorb impact energy.
[0027] In addition, an anti-slip structure is provided on the upper surface (i.e., the usable surface) of the manhole cover body. This anti-slip structure can specifically be manifested as regularly arranged raised stripes (stripes approximately 2-3mm high, 5-10mm wide, and spaced approximately 10-15mm apart), or diamond-shaped grid grooves pressed into the surface (groove depth approximately 1-2mm, groove width approximately 2-3mm), to increase the friction between the tire and the manhole cover surface and improve driving safety.
[0028] This high-impact composite resin manhole cover significantly enhances its overall impact resistance through the synergistic effect of its multi-layered composite structure (an outer GFRP layer providing high strength and weather resistance, a middle corrugated metal skeleton layer providing core bending and impact resistance, and an inner rubber layer providing cushioning) and the high-impact resin material layer within the cavity. This effectively resists frequent vehicle traffic and heavy object impacts. Simultaneously, the elastic rubber material layer on the inner side and the deformation capacity of the corrugated metal skeleton work together to provide excellent shock absorption and impact energy absorption, significantly reducing noise generated when vehicles pass by. The manhole cover also exhibits excellent wear resistance, aging resistance, sealing properties, and anti-slip properties, fully meeting the requirements for high-performance manhole covers in municipal roads and other locations.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A high-impact composite resin manhole cover, characterized in that: It includes a composite frame having a cavity, and a high-impact resin material layer that fits the inner wall of the composite frame is disposed in the cavity; the cavity contains an outer high-strength glass fiber reinforced composite material layer, a middle metal skeleton layer, and an inner elastic rubber material layer.
2. The high-impact composite resin manhole cover according to claim 1, characterized in that: An adhesive layer is provided between adjacent high-strength glass fiber reinforced composite material layers, metal skeleton layers, or elastic rubber material layers.
3. The high-impact composite resin manhole cover according to claim 2, characterized in that: The metal skeleton layer has a wave-shaped structure, which includes alternating sinking sections and undulating sections.
4. The high-impact composite resin manhole cover according to claim 3, characterized in that: The metal skeleton layer is made of high-strength alloy material.
5. The high-impact composite resin manhole cover according to claim 3, characterized in that: The ratio of the lateral lengths of the sunken section and the undulating section is between 1:1 and 1:1.
5.
6. The high-impact composite resin manhole cover according to claim 3, characterized in that: The ratio of the numerical height of the sinking section and the undulating section is between 1:1 and 1:1.
5.
7. The high-impact composite resin manhole cover according to claim 3, characterized in that: The surface of the manhole cover is equipped with an anti-slip structure.