Self-luminous light-transmitting concrete safety warning inspection well cover

Abstract

The utility model discloses a self-luminous light-transmitting concrete safety warning inspection well cover which comprises a basin-shaped high-strength alloy shell arranged in a ground pit slot, a light-transmitting concrete layer serving as a light-transmitting material is placed in the high-strength alloy shell, a self-luminous assembly is arranged in the light-transmitting concrete layer, and the light-transmitting concrete layer is made of light-transmitting materials. An auxiliary light-emitting assembly is arranged at the position, connected with the high-strength alloy shell, of the bottom of the light-transmitting concrete layer, and the self-light-emitting assembly emits light at night through a temperature excitation material and supplements light through the auxiliary light-emitting assembly. The light-transmitting concrete is adopted, the light-emitting area is greatly increased, the scheme of single-point or partial light emitting in the prior art is improved, meanwhile, the PCM energy storage aggregate and the thermoluminescent crystal are matched to enable self-light-emitting at night, and then the auxiliary light-emitting assembly is matched to enable self-light-emitting to be achieved. And the temperature of the underground space is stably lower than that of the light-transmitting concrete layer, so that stable energy storage of the thermoelectric power generation sheet is realized, and further the failed thermoluminescent crystal can be supplemented with light through the LED lamp strip.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically a self-illuminating and translucent concrete safety warning manhole cover. Background Technology

[0002] Currently, luminous manhole covers used as warnings typically employ a luminous or reflective coating on the outer surface of the cover. These coatings work by absorbing and storing light during the day and releasing it at night, thus achieving self-illumination at night to warn pedestrians or vehicles on the road to be aware of safety.

[0003] For example, patent "CN 206308713 U" describes a method that uses a ring of light-emitting elements on or around the base of a manhole cover, controlled by an intelligent electronic sensing system, to intelligently alert pedestrians or drivers to safety. For self-illuminating safety warning manhole covers, the intensity of the self-illumination is crucial to attracting the attention of pedestrians or drivers; this refers to the afterglow decay of the fluorescent material (brightness of 0.32 mcd / m²), which is the limit of human vision's light perception in darkness. The duration of illumination is also important. For self-illuminating safety warning manhole covers with fluorescent coatings, weather conditions are a significant factor affecting their functionality. On sunny days, with ample sunlight, the fluorescent material absorbs more radiation. On cloudy days, the sun is blocked by clouds, preventing sufficient absorption and resulting in low intensity and short duration of illumination at night. Furthermore, the fluorescent coating has poor wear resistance and is easily damaged by prolonged contact with tires or foot abrasion, affecting afterglow intensity. For self-luminous safety warning manhole covers with luminescent elements, the luminous area is often small, which fails to provide a warning. The luminous intensity is a major drawback.

[0004] This case arose in order to resolve the aforementioned issues. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a self-illuminating and translucent concrete safety warning manhole cover, which solves the problems mentioned in the background art.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a self-luminous and translucent concrete safety warning manhole cover, comprising a basin-shaped high-strength alloy shell placed in a pit in the ground, characterized in that: a translucent concrete layer as a light-transmitting material is placed inside the high-strength alloy shell, wherein a self-luminous component is provided in the translucent concrete layer, and an auxiliary light-emitting component is provided at the bottom of the translucent concrete layer and at the junction with the high-strength alloy shell, wherein the self-luminous component emits light at night by exciting the material through temperature, and supplements the light in environments with insufficient solar energy input by the auxiliary light-emitting component.

[0009] Preferably, the self-luminous component includes a thermoluminescent crystal, a light-guiding material, and a thermoluminescent crystal; sunlight passes through the light-guiding fiber in the translucent concrete to excite the thermoluminescent crystal (photons are stored in the thermoluminescent crystal), and at the same time, the radiation energy generated by the sunlight is absorbed by the PCM (stores heat). At night, the PCM releases heat, which excites the thermoluminescent crystal to release light (releases the photons stored during the day), and the translucent concrete emits light through the light-guiding fiber.

[0010] The optical fiber serves as a channel for sunlight photons to enter the thermoluminescent crystal. During the day, the temperature-excited material absorbs and stores solar heat to form a stable heat source. At the same time, sunlight can excite the thermoluminescent crystal. At night, the temperature drops, and the temperature-excited material releases heat to excite the thermoluminescent crystal to achieve self-luminescence.

[0011] The auxiliary light-emitting component includes a thermoelectric generator forming a closed loop through wires and a battery. The battery is connected to multiple LED light strips through wires. The area below the thermoelectric generator is an underground space with a stable temperature lower than that of the translucent concrete layer. The light energy released by the LED light strips dissipates heat, which is then absorbed and stored by the temperature-excited material, and can excite the thermoluminescent crystal.

[0012] Preferably, the thermoelectric generator is formed in a ring shape, with one ring placed between each pair of adjacent LED light strips. One side of the thermoelectric generator is in close contact with the light-transmitting concrete layer, and the other side is in close contact with the high-strength alloy shell.

[0013] Preferably, the LED light strips are distributed in rings, each ring light strip is connected to a battery, and the auxiliary light-emitting components are controlled to emit light by an intelligent control module. A temperature sensor is also provided in the translucent concrete layer.

[0014] Preferably, the thermoluminescent crystal is any one of α-Al2O3:C crystal, lead tungstate crystal, or quartz crystal.

[0015] Preferably, the temperature-activated material includes an organic temperature-activated material that can generate a solid-liquid phase transition process, or paraffin, fatty acids and their esters and other organic compounds or inorganic temperature-activated materials, or a designed eutectic temperature-activated material, or a mixture of the above-mentioned temperature-activated materials with one or more of thickeners, nucleating agents, flame retardants, rust inhibitors and thermal conductive agents.

[0016] Preferably, the temperature-excited material contains metal nanoparticles, nano-metal oxides, or carbon-based nanomaterials.

[0017] Preferably, the inner side of the high-strength alloy shell is provided with a heat conduction regulating membrane as a one-way heat conduction film, which covers the entire translucent concrete.

[0018] The application principle is as follows: During the day, the thermoluminescent crystals distributed in the translucent concrete layer absorb and store the radiant energy of sunlight passing through the layer. Simultaneously, the temperature-excited material (PCM energy storage particles) in the translucent concrete layer first stores sensible heat to reach the phase transition temperature, and then continues to store external heat using latent heat. At this point, the temperature no longer rises, forming a stable heat source at one end. Below the thermoelectric generator in the translucent concrete layer is a dark underground space with a lower and more stable temperature than the concrete layer. Therefore, connecting a circuit at both ends of the thermoelectric generator generates a regular and more stable current, which is then stored in a battery through wires. At night, the temperature of the translucent concrete layer decreases, and the temperature-excited material begins to release heat. At this time, the excited thermoluminescent crystals, under the stimulation of external heat, release energy again in the form of light through the recombination of stored electrons and holes. Through the light-guiding fibers in the translucent concrete layer, the concrete can achieve self-luminescence.

[0019] The temperature of the concrete matrix is ​​detected by a temperature sensor. When the temperature is insufficient to excite or maintain a certain glow intensity of the thermoluminescent crystal, the battery (which collects electrical energy on sunny days) is controlled to discharge so that the LED light can emit light. At the same time, during the process of converting electrical energy into light energy, heat is dissipated and can be stored in the temperature-excitation material in the translucent concrete layer. Meanwhile, the light emitted by the LED light can serve as the excitation source for the thermoluminescent crystal, assisting the LED light in emitting light. Beneficial effects

[0020] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a self-luminous and translucent concrete safety warning manhole cover. The base material of the manhole cover is translucent concrete, which greatly increases the luminous area and improves upon the previous technical solutions that used single-point or partial luminescence. Thermoluminescent crystals are added to the translucent concrete to achieve self-luminescence; at the same time, PCM energy storage particles are added to store the heat generated by the absorbed solar energy, prolonging the excitation time of the thermoluminescent crystals. Combined with a thermoelectric power generation system, a continuous, stable, and regular current is obtained. In cases where the thermoluminescent crystals are poorly excited or have weak afterglow under the influence of cloudy days or other adverse weather conditions, supplementary lighting is provided by an auxiliary luminescence system, thereby achieving the function of a warning device at night.

[0021] Secondly, utilizing stored electrical energy achieves resource conservation and a closed-loop resource utilization system. Simultaneously, using concrete as a substrate provides excellent waterproofing, better protecting the internal auxiliary light-emitting components, avoiding future maintenance and incurring additional costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a top view of the present invention.

[0024] In the diagram: 1. High-strength alloy shell; 2. Heat conduction control membrane; 3. Translucent concrete layer; 4. LED light strip; 5. Thermoelectric generator; 6. Battery; 7. Wire; 8. Temperature sensor; 9. Intelligent control module. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1-2 As shown: A self-illuminating and translucent concrete safety warning manhole cover includes a high-strength alloy shell 1, a heat conduction regulating membrane 2, a translucent concrete layer 3, an LED light strip 4, a thermoelectric generator 5, a battery 6, a wire 7, a temperature sensor 8, and an intelligent control module 9.

[0027] The translucent concrete layer 3 has a cylindrical appearance and contains cement mortar or concrete as the main material, with added light-guiding fibers (or translucent aggregates), thermoluminescent crystals and phase change energy storage materials, and a temperature sensor 8.

[0028] Thermoluminescent crystals are materials that emit light when heated under the excitation of light or ray particles, based on the principle of thermoluminescence. Thermoluminescent crystals / thermoluminescent materials can be... Crystals, such as lead tungstate crystals or quartz crystals, are used. Specifically, during the day, the translucent concrete layer can absorb and store the radiant energy of sunlight. At night, as the temperature of the translucent concrete layer decreases, the temperature-excited materials within it begin to release heat. At this time, the excited thermoluminescent crystals, under the influence of external heat stimulation, release energy again in the form of light through the recombination of stored electrons and holes.

[0029] Sunlight passes through the light-guiding fibers in the translucent concrete and excites the thermoluminescent crystal (photons are stored in the thermoluminescent crystal). At the same time, the radiation energy generated by the sunlight is absorbed by the PCM (stores heat). At night, the PCM releases heat, which excites the thermoluminescent crystal to release light (releases the photons stored during the day).

[0030] Phase change energy storage particles can store a large amount of external heat through latent heat storage.

[0031] Temperature sensor 8 is embedded in the substrate of the translucent concrete layer to monitor the temperature of the translucent concrete layer 3 and determine whether the temperature of the substrate is sufficient to excite the thermoluminescent crystal. If the temperature cannot excite the crystal or the required afterglow intensity is not reached after excitation, LED light strip 4 is used for auxiliary light emission.

[0032] The self-emissive layer includes LED light strips 4 arranged in rings, each ring connected to a battery 6 and independently controllable. It is located between the translucent concrete 3 and the high-strength alloy shell 1. Temperature is monitored by a temperature sensor 8 and transmitted to an intelligent control module 9. When the temperature is below a preset value, the module controls the activation of different numbers of LED light strips 4.

[0033] The thermoelectric power generation module is arranged in a ring, with one ring placed between each pair of adjacent LED light strips and tightly attached to the translucent concrete layer. The other side is tightly attached to a high-strength alloy shell. Based on the Seebeck effect (when the temperature at one end is higher than the other, thermal motion causes hot electrons to diffuse from the high-temperature end to the low-temperature end, resulting in the accumulation of electrons at the contact surface and the formation of a potential difference. This potential difference can be captured by an external circuit to generate current, realizing the conversion of thermal energy into electrical energy), a stable potential difference is generated by maintaining a stable hot and cold end, thus obtaining a continuous, stable, and regular current.

[0034] Specifically, after the phase change energy storage particles absorb the heat generated by solar radiation, they can maintain the temperature of the entire translucent concrete 3 within a certain range and keep it at a relatively high temperature, serving as a constant high-temperature end. The area beneath the manhole cover is generally a dark, damp, and cold sewer, where temperature changes are infrequent, serving as a constant cold end. The current generated by the thermoelectric generator module 5 is stored in the battery 6 via the wire 7. The battery is placed below the LED light strip 4, and the battery 6 is placed on the high-strength alloy casing 1.

[0035] The battery 6 is located between the translucent concrete 3 and the high-strength alloy casing 1. Its weight is borne by the bottom high-strength casing.

[0036] In the above technical solution, the temperature-activating material is an organic temperature-activating material or paraffin, fatty acids and their esters, and other organic compounds or inorganic temperature-activating materials capable of generating a solid-liquid phase transition process: CaCl2·6H2O (calcium chloride hexahydrate), Na3PO4 (sodium phosphate), Na2SO4·10H2O (sodium sulfate), MgCl2·6H2O (magnesium chloride hexahydrate), etc. Alternatively, it can be a designed eutectic temperature-activating material or a mixture of the above-mentioned temperature-activating materials with one or more of the following: thickener, nucleating agent, flame retardant, rust inhibitor, thermal conductive agent, etc.

[0037] In the above technical solution, the temperature-excited material can be filled with metal nanoparticles, nano-metal oxides, or carbon-based nanomaterials to improve the thermal conductivity of the material. The metal can be copper; the metal oxide can be copper oxide, aluminum oxide, etc.; and the carbon-based material can be carbon nanofibers, carbon nanotubes, or graphite powder, generally using particles with a size of 10 to 100 nanometers.

[0038] In the above technical solution, the thermoluminescent crystal is a material that emits light when heated under the excitation of light or ray particles based on the principle of thermoluminescence. The thermoluminescent crystal / thermoluminescent material can be... Crystals, lead tungstate crystals, or quartz crystals, etc.

[0039] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A self-illuminating and translucent concrete safety warning manhole cover, comprising a basin-shaped high-strength alloy outer shell placed in a ground pit, characterized in that: The high-strength alloy shell contains a translucent concrete layer as a light-transmitting material. The translucent concrete layer contains a self-luminous component. At the bottom of the translucent concrete layer and where it connects to the high-strength alloy shell, there is an auxiliary light-emitting component. The self-luminous component emits light at night by exciting the material with temperature and is supplemented by the auxiliary light-emitting component.

2. The self-illuminating and translucent concrete safety warning manhole cover according to claim 1, characterized in that: The self-luminescent component includes a thermoluminescent crystal in a translucent concrete layer and a light-guiding fiber. The light-guiding fiber serves as a channel for sunlight to enter the thermoluminescent crystal. During the day, the temperature-excited material absorbs and stores solar heat to form a stable heat source. At the same time, sunlight can excite the thermoluminescent crystal. At night, the temperature drops, and the temperature-excited material releases heat to excite the thermoluminescent crystal to achieve self-luminescence. The auxiliary light-emitting component includes a thermoelectric generator forming a closed loop through wires and a battery. The battery is connected to multiple LED light strips through wires. Below the thermoelectric generator is an underground space with a stable temperature lower than that of the translucent concrete layer. The light energy emitted by the LED light strip dissipates heat, which is then absorbed and stored by the temperature-excited material, and can also excite the thermoluminescent crystal.

3. A self-illuminating and translucent concrete safety warning manhole cover according to claim 2, characterized in that: The thermoelectric generator is formed in a ring shape, with one ring placed between each pair of adjacent LED light strips. One side of the thermoelectric generator is in close contact with the translucent concrete layer, and the other side is in close contact with the high-strength alloy shell.

4. A self-illuminating and translucent concrete safety warning manhole cover according to claim 2, characterized in that: The LED light strips are distributed in rings, and each ring is connected to a battery. The auxiliary light-emitting components are controlled to emit light by an intelligent control module. A temperature sensor is also installed in the translucent concrete layer, and the temperature it monitors is transmitted to the intelligent control module. When the temperature is lower than a preset value, the LED light strips are turned on.

5. A self-illuminating and translucent concrete safety warning manhole cover according to claim 2, characterized in that: The thermoluminescent crystal is any one of α-Al2O3:C crystal, lead tungstate crystal, or quartz crystal.

6. A self-illuminating and translucent concrete safety warning manhole cover according to claim 1, characterized in that: The inner side of the high-strength alloy shell is provided with a heat conduction regulating membrane as a one-way heat conduction film, which covers the entire translucent concrete.

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