Mass concrete cooling device with additional thermoelectric material

Abstract

The utility model discloses a large-volume concrete cooling device with additional thermoelectric materials. The large-volume concrete cooling device comprises a water pipe, a flexible joint, a thermoelectric assembly and a radiator, the multiple sections of water pipes are flexibly connected end to end through flexible joints, and water outlets and water inlets of the water pipes are communicated with an external water source to form a closed-loop water circulation path; a plurality of thermoelectric components are bonded on the outer surface of the water pipe at intervals and are connected with the radiator; the electric heating assembly is communicated with an external energy storage device. The cold end of the thermoelectric module is bonded with the aluminum pipe, and the hot end of the thermoelectric module is bonded with the copper radiator, so that real-time monitoring of the internal temperature of concrete and hydration heat power generation are synchronously realized; the thermoelectric module converts waste heat of a traditional water cooling system into electric energy through the thermoelectric power generation technology, and the problem of heat waste is solved. Meanwhile, a high-temperature area can be accurately positioned through electric signal feedback, and the crack risk is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building construction, and particularly relates to a mass concrete cooling device with additional thermoelectric materials. BACKGROUND

[0002] In mass concrete construction, the concentrated heat released by the cement hydration reaction can cause the internal temperature of the concrete to rise sharply, forming a significant internal-external temperature difference. When the temperature stress caused by the temperature difference exceeds the tensile strength of the concrete, cracks will occur on the surface or inside the structure.

[0003] Such cracks not only damage the integrity of the structure, but also accelerate the penetration of water and corrosive media, induce steel corrosion, freeze-thaw damage and other problems, and seriously weaken the durability and load-bearing capacity of the structure. Especially for key projects such as water conservancy dams, nuclear power plant raft foundations, and super-high-rise building pile foundations, structural cracks can cause leakage, settlement, and even catastrophic failure, with high repair costs and great construction difficulty.

[0004] At present, the cooling method of pre-buried water pipes and circulating cooling water by water pumps is commonly used in engineering. However, this technology has the following defects:

[0005] 1. The existing water cooling system relies on external temperature sensors for limited point monitoring, and it is difficult to real-time feedback the temperature distribution of different areas inside the concrete. Especially in complex structures or areas with uneven thickness, local high temperature is easy to be missed, leading to delayed temperature control and increased crack risk.

[0006] 2. The traditional method only passively dissipates hydration heat through water circulation, and does not effectively utilize the heat. A large amount of heat is directly discharged with cooling water, causing energy waste, which is particularly prominent in remote projects lacking external power supply.

[0007] 3. The rigid water pipes are easily impacted and vibrated during concrete vibration, and the interfaces are easy to crack and leak. Moreover, the existing device cannot flexibly adjust the heat dissipation path according to the thickness and stress distribution of the concrete, resulting in poor local temperature control effect. CONTENT OF THE UTILITY MODEL

[0008] The utility model aims to provide a mass concrete cooling device with additional thermoelectric materials, which can effectively reduce the internal temperature of the concrete and utilize the hydration heat for power generation.

[0009] The mass concrete cooling device with additional thermoelectric materials provided by the utility model comprises a water pipe, a flexible joint, a thermoelectric component, and a radiator. Multiple water pipes are connected in a flexible manner through the flexible joints, and the water outlets and water inlets thereof are connected with an external water source to form a closed-loop water circulation path. Multiple thermoelectric components are attached to the outer surface of the water pipe at intervals, and the thermoelectric components are connected with the radiator. The thermoelectric component is connected with an external energy storage device.

[0010] In an embodiment of the above device, the water pipe is a cylindrical aluminum rigid heat dissipation pipe.

[0011] In an embodiment of the above device, the outer surface of the water pipe is sprayed with an aluminum nitride ceramic coating.

[0012] In an embodiment of the above device, the soft joint is made of rubber material and adopts a three-layer composite structure.

[0013] In an embodiment of the above device, the inner layer of the soft joint is a fluororubber sealing layer, the middle layer is embedded with an aramid fiber reinforced network, and the outer layer is coated with weather-resistant neoprene.

[0014] In an embodiment of the above device, flange compression is adopted between the soft joint and the water pipe.

[0015] In an embodiment of the above device, the thermoelectric assembly includes a substrate, a power generation unit, and a temperature sensor; the substrate is divided into a cold end and a hot end, the cold end is bonded to the water pipe, and the hot end is bonded to the heat sink; the power generation unit is arranged in the substrate and is composed of multiple pairs of thermocouples connected in series; the power generation unit is connected to an external energy storage device through flexible wires 33; the temperature sensor is a resistance arranged on the surface of the water pipe and is led out by the power generation unit.

[0016] In an embodiment of the above device, the resistance is wrapped with a silica gel sheath.

[0017] In an embodiment of the above device, the heat sink includes a base and fins; the base is a copper base, and the fins are formed by vertically and horizontally interlaced connection of multiple groups of rectangular rings; the fins are fixed on the base, and the base is bonded to the hot end of the substrate.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. The cold end of the thermoelectric module is bonded to the aluminum pipe, and the hot end is bonded to the copper heat sink, thereby realizing real-time monitoring of the internal temperature of the concrete and hydration heat power generation simultaneously; the thermoelectric module utilizes the temperature difference power generation technology to convert the waste heat of the traditional water cooling system into electrical energy, thereby solving the problem of heat waste; at the same time, the electrical signal feedback can accurately locate the high temperature area, thereby significantly reducing the risk of cracks;

[0020] 2. The aluminum pipe quickly absorbs heat, and the copper heat sink increases the contact area through the fins to form a gradient heat dissipation channel; according to the stress distribution of the concrete structure, the thermoelectric module is densely arranged in key areas such as beam-column joints, and the aluminum pipe adopts linear segment splicing + curved segment flexible connection, which can adapt to the precise temperature control requirements of different thickness of concrete;

[0021] 3. The aluminum pipe bending section is provided with a rubber flexible joint, which can absorb water flow impact vibration through elastic deformation, reduce pipe body stress, and avoid interface cracking and water leakage caused by concrete pouring vibration; the thermoelectric module generates electricity to form an energy self-circulation system with external water circulation, and can still operate continuously in a field scene without external power supply, and is especially suitable for water conservancy dams, remote bridges and other projects. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application. (The flange is not shown)

[0023] Figure 2 It is a schematic diagram of the thermoelectric assembly.

[0024] Figure 3 It is a schematic diagram of the copper heat sink. DETAILED DESCRIPTION

[0025] The related technical solutions will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the present application.

[0026] As shown in Figure 1 The large-volume concrete cooling device disclosed in the present embodiment includes a water pipe 1, a flexible joint 2, a thermoelectric assembly 3, and a heat sink 4.

[0027] The water pipe 1 is a cylindrical aluminum rigid heat dissipation pipe, and multiple sections of the water pipe are connected flexibly at the head and tail through the flexible joint 2. The water outlet and the water inlet are connected with an external water source to form a closed-loop water circulation passage.

[0028] The outer surface of the water pipe 1 is sprayed with an aluminum nitride ceramic coating, and the coating thickness is 0.2-0.5 mm, which can maintain the high thermal conductivity of the aluminum base and avoid the corrosion of the pipe body in the alkaline environment of the concrete.

[0029] The flexible joint 2 is made of rubber. The flexible joint has a three-layer composite structure. The inner layer is a fluororubber sealing layer, which can withstand high-temperature circulating water flow. The middle layer is embedded with an aramid fiber reinforced net to enhance the tensile strength. The outer layer is covered with weather-resistant neoprene to ensure the structural integrity under the concrete vibrating working condition.

[0030] The flexible joint 2 and the water pipe 1 are connected by flange crimping to ensure the sealing property in the vibrating environment.

[0031] A plurality of thermoelectric assemblies 3 are bonded at intervals on the outer surface of the water pipe 1, and the thermoelectric assemblies are connected with the heat sink 4.

[0032] AsFigure 2 As shown, the thermoelectric assembly 3 includes a substrate, a power generation unit, and a temperature sensor.

[0033] The substrate is divided into a cold end 31 and a hot end 32, the cold end is bonded with the water pipe 1, and the hot end is bonded with the heat sink 4.

[0034] The power generation unit is provided in the substrate and is composed of multiple pairs of thermocouples connected in series. The power generation unit is connected with an external energy storage device through flexible wires 33.

[0035] The temperature sensor is a resistance provided on the surface of the water pipe and is led out from the power generation unit; the resistance is wrapped with a silica gel sheath.

[0036] The thermoelectric assembly realizes temperature difference power generation through the Seebeck effect: when the hydration heat of the concrete makes the temperature of the heat sink higher than the water temperature of the water pipe, the power generation unit generates an electromotive force, and the generated electric energy is transmitted to the energy storage device through the wires. At the same time, the voltage signal of the temperature sensor reflects the temperature gradient of the concrete in real time.

[0037] As shown, Figure 3 The heat sink 4 includes a base 41 and fins 42. The base 41 is a copper base, and the fins 42 are shaped by vertically and horizontally interlaced connection of multiple groups of rectangular rings. The fins are fixed on the base, and the base is bonded with the hot end of the substrate.

[0038] The use method of the device includes the following steps:

[0039] 1. Cooling system planning and arrangement: according to the geometric parameters and temperature field simulation results of the mass concrete structure, the water pipe laying path is determined; for the plane structure of the foundation raft, the serpentine pipe laying method is adopted; for the beam-column joints and the thickness mutation area, the arrangement density of the thermoelectric module and the heat sink is increased to strengthen the temperature monitoring and control ability of the area.

[0040] 2. Water pipe installation: connect multiple water pipes through flange compression connection with flexible joints to form a continuous pipeline; ensure good sealing during connection to prevent water leakage; the whole waterway is buried in the layer with the maximum temperature gradient inside the concrete, which can effectively absorb the hydration heat and will not affect the overall strength of the concrete structure. Ensure that the pipe body outer wall coating is intact during installation.

[0041] 3. Thermoelectric assembly assembly: bond the thermoelectric module at a fixed interval on the outer surface of the water pipe; use thermal conductive glue to fully bond the cold end of the module with the surface of the water pipe. During installation, the vertical rings and horizontal rings of the fins of the heat sink are staggered and face the direction of the concrete entity. The flexible wires of each module are bundled and led out along the surface of the water pipe, and the temperature sensor resistance wrapped with a silica gel sheath is fixed tightly against the pipe wall.

[0042] 4. Closed loop system joint debugging test: connecting the water pipe inlet and outlet with the external circulating water pump to form a closed loop, checking the pipeline sealing after water injection and pressurization. Monitor the output voltage of each thermoelectric module after water circulation, test the temperature monitoring and power generation function of the thermoelectric module, and ensure that the device can work normally after the concrete is poured.

[0043] 5. Concrete pouring operation and maintenance: after pouring, automatically adjust the cooling water circulation rate according to the voltage signal change of the thermoelectric module: when the temperature difference of a certain area is too large, trigger an alarm and increase the water flow of that branch; the generated electricity is stored in real time and supplied to the system's own water pump, forming a continuous temperature control capability without external power supply. After the maintenance period is over, the pipeline can be permanently plugged by injecting cement slurry through the water inlet.

[0044] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although a detailed description is made with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A mass concrete cooling device with additional thermoelectric material, characterized by: It includes water pipe, flexible joint, thermoelectric component and radiator; the multi-section water pipe is connected by flexible joint, and the water outlet and the water inlet are communicated with external water source to form closed loop water circulation passage; the outer surface of the water pipe is bonded with multiple thermoelectric components, and the thermoelectric components are connected with the radiator; the electric heating component is communicated with external energy storage device.

2. The mass concrete cooling apparatus with additional thermoelectric material according to claim 1, characterized in that: The water pipe is cylindrical aluminum rigid radiator pipe.

3. The mass concrete cooling apparatus with additional thermoelectric material according to claim 1, wherein: The outer surface of the water pipe is sprayed with aluminum nitride ceramic coating.

4. The mass concrete cooling apparatus with additional thermoelectric material according to claim 1, wherein: The flexible joint is made of rubber material and adopts three-layer composite structure.

5. The mass concrete cooling apparatus with additional thermoelectric material according to claim 4, characterized in that: The inner layer of the flexible joint is fluorine rubber sealing layer; the middle layer is embedded with aramid fiber reinforced net; and the outer layer is coated with weather-resistant neoprene.

6. The mass concrete cooling apparatus with additional thermoelectric material according to claim 1, wherein: The flexible joint and the water pipe are connected by flange press connection.

7. The mass concrete cooling apparatus with additional thermoelectric material according to claim 1, wherein: The thermoelectric component includes substrate, power generation unit and temperature sensor. The substrate is divided into cold end and hot end, the cold end is bonded with the water pipe, and the hot end is bonded with the radiator; the power generation unit is arranged in the substrate and is composed of multiple pairs of thermocouples in series; the power generation unit is communicated with external energy storage device through flexible wire; the temperature sensor is electric resistance arranged on the surface of the water pipe and is led out by the power generation unit.

8. The mass concrete cooling apparatus with additional thermoelectric material according to claim 7, characterized in that: The electric resistance is wrapped with silica gel sheath.

9. The mass concrete cooling apparatus with additional thermoelectric material according to claim 7, wherein: The radiator includes base and fin; the base is copper base, and the fin is formed by multiple groups of rectangular rings which are vertically and horizontally staggered; the fin is fixed on the base, and the base is bonded with the hot end of the substrate.

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