CN111908950A - Intelligent temperature control system for controlling concrete temperature cracks - Google Patents
Intelligent temperature control system for controlling concrete temperature cracks Download PDFInfo
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- CN111908950A CN111908950A CN202010737950.8A CN202010737950A CN111908950A CN 111908950 A CN111908950 A CN 111908950A CN 202010737950 A CN202010737950 A CN 202010737950A CN 111908950 A CN111908950 A CN 111908950A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0075—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a decrease in temperature
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0082—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a rise in temperature, e.g. caused by an exothermic reaction
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
- G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses an intelligent temperature control system for controlling concrete temperature cracks, which comprises a temperature difference controller, a temperature sensor, a circulating pump, heat-conducting fluid storage equipment and a temperature-controllable template. The temperature sensor transmits signals of the internal temperature of the concrete and the temperature of the inner side of the template to the temperature difference controller, and the temperature difference controller controls the circulating pump to be opened and closed according to a set temperature difference value. The heat-conducting fluid is positioned in the temperature-controllable template or on the side surface of the temperature-controllable template, and is in close contact with the surface of the template, and the circulating pump controls the flow of the heat-conducting fluid from the heat-conducting fluid storage device to the interior or the exterior of the template. The heat-conducting fluid storage equipment consists of a container, a heating device and a cooling device. The temperature of the template is adjusted through the flowing of the heat-conducting fluid in the template and the flowing of the heat-conducting fluid on the side face, so that the temperature of the template and the temperature in the concrete are guaranteed to be within a reasonable range, and the risk of concrete cracking caused by temperature stress is reduced.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an intelligent temperature control system for controlling concrete temperature cracks.
Background
The development and utilization of underground space are products of city development to a certain stage, and play a significant role in the aspects of traffic, storage, civil defense, commerce and the like, such as traffic projects mainly based on underground rail traffic and tunnels, comprehensive pipe gallery projects mainly based on city water supply and drainage, electric power, communication, gas and heating, commerce and convenience projects represented by underground shopping malls and underground parking lots, and anti-interference and anti-radiation underground laboratory construction projects for scientific research activities.
The first condition of underground space development is to solve the infiltration of underground water, surface water, municipal pipe network water leakage and capillary water, and ensure that no leakage occurs in the project. However, the leakage rate of the existing underground space engineering in China is quite high, and the leakage rate of partial areas is as high as more than 60%.
The waterproof principle that underground structures should follow is proposed in the technical specification for underground engineering (GB 50108-2008) to be as follows: the principle of taking prevention as the main part, combining prevention and drainage, combining hardness and softness, multiple defense lines, adjusting according to local conditions and comprehensively treating.
The concrete cracks due to temperature stress and the like are common problems in construction. After concrete is poured, because cement hydration is an exothermic reaction, the temperature of the concrete can be gradually increased in the process of setting and hardening, the hydration heat of the surface layer is easy to transfer, the internal hydration heat is difficult to transfer, and the internal hydration heat is accumulated in the concrete to cause the temperature difference between the internal temperature and the surface layer temperature. The basement concrete side wall is long and thin along the horizontal direction, and its upper portion and lower part are restricted by beam slab and soleplate respectively, and the early temperature shrinkage crack of concrete easily appears. Concrete fracture, fluids such as groundwater, rainwater, earth's surface water enter into the concrete very easily inside, and then arouse the reinforcing bar corrosion, reinforcing bar corrosion product volume expansion 4~6 times, further aggravate concrete fracture, and then aggravate the reinforcing bar corrosion. Therefore, the concrete temperature shrinkage cracks of the basement side wall seriously damage the reliability of the structure.
Disclosure of Invention
In view of the above problems, the present invention is directed to an intelligent temperature control system for controlling concrete temperature cracks, which controls the temperature difference between the inside and the outside of the concrete within a reasonable range, thereby reducing the risk of concrete cracks caused by temperature stress.
A intelligent temperature control system for controlling concrete temperature crack, its characterized in that includes: the temperature-controllable template is communicated with the temperature-controllable template through a guide pipe, the circulating pump is arranged on the guide pipe, the temperature sensor is arranged on the temperature-controllable template, and the temperature sensor, the circulating pump and the temperature difference controller are electrically connected.
The temperature difference controller is used for controlling the opening and closing of the circulating pump through monitoring and judging the temperature difference; specifically, in the illustrated embodiment of the invention, the temperature difference controller controls the temperature limit range of the on and off of the circulating pump to be 20-25 ℃.
Namely, the temperature difference between the interior and the surface of the concrete is set within the range of 20-25 ℃ according to specific engineering and environmental temperature. When the concrete is poured in the high-temperature environment, the cooling device and the circulating pump of the heat-conducting fluid storage equipment are started; when the temperature difference between the interior and the surface of the concrete exceeds a set temperature, the cooling device of the heat-conducting fluid storage equipment and the circulating pump are closed; and when the temperature difference between the interior and the surface of the concrete is smaller than a set value, the cooling device of the heat-conducting fluid storage equipment and the circulating pump are started again. When concrete is poured in a low-temperature environment, a heating device and a circulating pump of the heat-conducting fluid storage equipment are started; when the temperature difference between the interior and the surface of the concrete is smaller than a set value, the heating device of the heat-conducting fluid storage equipment and the circulating pump are closed; when the temperature difference between the interior of the concrete and the surface of the concrete is higher than a set value, the heating device of the heat-conducting fluid storage device and the circulating pump are started again.
The temperature sensor is electrically connected with the temperature difference controller, is positioned inside the template and inside the concrete and is used for outputting temperature signals inside the template and inside the concrete to the temperature difference sensor; specifically, the temperature sensor comprises a middle sensor and an edge sensor, the middle sensor is arranged at the center of concrete in the pouring space, and the edge sensor is arranged on the metal plate. Preferably a medium temperature sensor;
and the circulating pump is connected with the temperature difference sensor and the heat-conducting fluid storage device and is used for controlling the flow speed and the flow of the heat-conducting fluid from the heat-conducting fluid storage device to the inside or the outside of the template.
The heat-conducting fluid is positioned inside or outside the temperature-controllable template and in the heat-conducting fluid storage equipment and is used for heating or cooling the temperature-controllable template;
the heat-conducting fluid storage equipment comprises a container, a heating device and a cooling device, and is used for storing, heating and cooling heat-conducting fluid;
the temperature-controllable template can make concrete structure and member be formed according to the defined position and geometric size, retain its correct position, and can bear self-weight of building template and external load acted on it, and can be used for transferring the heat quantity of concrete interior to exterior or heating concrete surface temperature so as to reduce the temperature difference between concrete interior and surface.
Specifically, the temperature-controllable template comprises a metal plate and a heat-conducting metal pipe fixed on the outer side of the metal plate, the heat-conducting metal pipe is communicated with the flow guide pipe through a pipe opening connecting piece, and the metal plate is made of metal materials with high heat conductivity coefficient, low density and high strength. The metal plates comprise two groups, the two groups of metal plates are connected through fasteners, a pouring space is formed between the two groups of metal plates, and concrete is poured in the pouring space.
Preferably, mouth of pipe connecting piece is established to heat conduction metal pipe's input, the input includes outer lane pipe and shorter inner circle pipe, outer lane pipe is provided with the internal thread, inner circle pipe port department is provided with the hypotenuse, mouth of pipe connecting piece is including the first interface of connection input, the second interface of connecting external fluid pipe, the diameter of second interface is greater than the diameter of first interface, the outstanding mouth of pipe connecting piece of first interface, first interface include the screw thread district, the screw thread district be provided with outer lane pipe's internal thread assorted external screw thread, first interface connection is between the outer lane pipe and the inner circle pipe of input, outer lane pipe is close to the port department and is provided with the fastening handle, the external fluid pipe of clamp connection is passed through to the second interface.
Preferably, a sealing gasket is arranged at the joint between the first interface and the input end.
Preferably, the outer surface of the fastening area is provided with a bulge to increase the surface roughness.
The intelligent temperature control system for controlling the temperature cracks of the concrete has the advantages that the flow of the circulating pump is adjustable, and the lowest flow is 100L/min.
According to the intelligent temperature control system for controlling the temperature cracks of the concrete, the heat-conducting fluid is preferably a fluid with large specific heat and a normal-temperature liquid-liquid phase change material.
The contact area between the heat-conducting fluid and the temperature-controllable template is as large as possible, and the flow speed of the heat-conducting fluid is easy to control and adjust. Specifically, the heat conduction metal pipe is distributed on the metal plate in an S shape, and the heat conduction metal pipe is provided with an adjusting valve.
The intelligent temperature control system for controlling the temperature cracks of the concrete is characterized in that a container of the heat-conducting fluid storage equipment is determined according to the size of the template and the volume of the concrete and is not less than 3m3。
According to the intelligent temperature control system for controlling the temperature cracks of the concrete, the metal plate is preferably made of metal materials with high heat conductivity coefficient, low density and high strength.
The intelligent temperature control system for controlling the temperature cracks of the concrete, provided by the embodiment of the invention, has the advantages of simple structure, convenience in installation and stability in temperature control.
Has the advantages that: the temperature inside and outside the concrete after pouring is measured by adopting a middle temperature sensor and an edge temperature sensor respectively, the temperature difference is analyzed by a temperature difference controller, and then the on-off and flow size adjustment of the circulating pump are realized. The whole system realizes complete intelligent automatic work.
Drawings
FIG. 1 is a view showing a connection structure of the present invention.
Fig. 2 is a structural view of a mouthpiece connector of the present invention.
Wherein: 1. the temperature difference control device comprises a temperature difference controller 2, a temperature sensor 21, a middle sensor 22, an edge sensor 3, a circulating pump 4, a heat-conducting fluid storage device 5, a heat-conducting fluid 6, a temperature-controllable template 7, concrete 8, a threaded area 9, a gasket 10, a fastening handle 11, a pipe orifice connector 1101, a first interface 1102, a second interface 1103, a transition area 12, a hoop 13, an external fluid pipe 14, an inner ring pipe 1401, a bevel edge 15 and an outer ring pipe.
Detailed Description
In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected or detachably connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals are used for the same elements. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
As shown in fig. 1 to 2, an intelligent temperature control system for controlling a temperature crack of concrete, comprising: controllable temperature template 6, heat-conducting fluid storage apparatus 4, circulating pump 3, temperature sensor 2, differential temperature controller 1, heat-conducting fluid storage apparatus 4 passes through honeycomb duct and controllable temperature template 6 intercommunication, circulating pump 3 sets up on the honeycomb duct, temperature sensor 2 sets up on controllable temperature template 6, temperature sensor 2, circulating pump 3 and differential temperature controller 1 electricity federation.
The temperature difference controller 1 is used for controlling the opening and closing of the circulating pump 3 through monitoring and judging the temperature difference; specifically, in the illustrated embodiment of the present invention, the temperature difference controller 1 controls the temperature limit of the circulation pump 3 to be switched off and on at 10 ℃ and 25 ℃, that is, the temperature difference between the inside and the surface of the concrete 7 is higher than 25 ℃, and the circulation pump 3 is switched on; when the temperature difference between the inside and the surface of the concrete 7 is lower than 10 ℃, the circulating pump 3 is closed.
The temperature sensor 2 is electrically connected with the temperature difference controller 1, is positioned inside the template and inside the concrete 7 and is used for outputting temperature signals inside the template and inside the concrete 7 to the temperature difference sensor; specifically, the temperature sensor 2 comprises a middle sensor 21 and an edge sensor 22, wherein the middle sensor 21 is arranged at the center of the concrete 7 in the casting space, and the edge sensor 22 is arranged on the metal plate. Preferably a medium temperature sensor 2;
and the circulating pump 3 is connected with the temperature difference sensor and the heat-conducting fluid storage equipment 4 and is used for controlling the flow speed and the flow rate of the heat-conducting fluid from the heat-conducting fluid storage equipment 4 to the inside or the outside of the template, the flow rate of the circulating pump 3 is adjustable, and the minimum flow rate is 100L/min.
The heat-conducting fluid is positioned inside or outside the temperature-controllable template 6 and in the heat-conducting fluid storage equipment 4 and is used for heating or cooling the temperature-controllable template 6;
a heat-conducting fluid storage device 4 comprising a container, a heating device and a cooling device for storing, heating,Cooling the heat transfer fluid; the intelligent temperature control system for controlling the temperature crack of the concrete 7 is characterized in that a container of the heat-conducting fluid storage equipment 4 is determined according to the size of the template and the volume of the concrete 7 and is not less than 3m3。
The temperature-controllable form 6 allows the concrete 7 structure, and components to be shaped according to the specified position and geometry, maintains its correct position, and can bear the self-weight of the building form and the external load acting on it, for conducting the heat inside the concrete 7 to the outside, or heating the surface temperature of the concrete 7, to reduce the temperature difference between the inside and the surface of the concrete 7.
Specifically, the temperature-controllable template 6 comprises a metal plate and a heat-conducting metal pipe fixed on the outer side of the metal plate, the heat-conducting metal pipe is communicated with the flow guide pipe through a pipe orifice connecting piece 11, and the metal plate is made of metal materials with high heat conductivity coefficient, low density and high strength. The metal plates comprise two groups, the two groups of metal plates are connected through fasteners, a pouring space is formed between the two groups of metal plates, and concrete 7 is poured in the pouring space. The metal plate is preferably made of a metal material having a high thermal conductivity, a low density and a high strength.
Preferably, mouth of pipe connecting piece 11 is established to heat conduction metal pipe's input, the input includes outer lane pipe 15 and shorter inner circle pipe 14, outer lane pipe 15 is provided with the internal thread, inner circle pipe 14 port department is provided with hypotenuse 1401, mouth of pipe connecting piece 11 is including the first interface 1101 of connecting the input, connect the second interface 1102 of external fluid pipe 13, the diameter of second interface 1102 is greater than the diameter of first interface 1101, first interface 1101 is outstanding mouth of pipe connecting piece 11, and first interface 1101 includes threaded area 8, threaded area 8 is provided with the external screw thread with outer lane pipe 15's internal thread assorted, first interface port department 1101 is connected between the outer lane pipe 15 and the inner circle pipe 14 of input, outer lane pipe 15 is close to and is provided with fastening handle 10, external fluid pipe 13 is connected through clamp 12 to second interface 1102.
Preferably, a sealing gasket is arranged at the connection position between the first port 1101 and the input end.
Preferably, the outer surface of the fastening area is provided with a bulge to increase the surface roughness.
The intelligent temperature control system is used for controlling the temperature cracks of the concrete.
According to the intelligent temperature control system for controlling the temperature cracks of the concrete, the heat-conducting fluid is preferably a fluid with large specific heat and a normal-temperature liquid-liquid phase change material.
The contact area between the heat-conducting fluid and the temperature-controllable template 6 is as large as possible, and the flow speed of the heat-conducting fluid is easy to control and adjust. Specifically, the heat conduction metal pipe is distributed on the metal plate in an S shape, and the heat conduction metal pipe is provided with an adjusting valve.
The specific working principle is as follows: the figure shows a schematic diagram of an intelligent temperature control system for controlling the temperature cracks of concrete 7. Wherein signal transmission is indicated by dashed lines and arrows represent signal transmission directions; the transfer of the heat transfer fluid is indicated by solid lines and the arrows represent the transfer direction of the heat transfer fluid.
Two middle temperature sensors 22 are arranged inside the concrete 77, one is arranged on one side of the temperature-controllable template 66 close to the concrete 77, the temperature signals of the temperature sensors 22 are transmitted to the temperature difference controller 11, and the temperature difference controller 1 gives opening or closing signals to the circulating pump 3. When the temperature difference between the interior and the surface of the concrete 7 is higher than 25 ℃, the circulating pump 3 is started; when the temperature difference between the inside and the surface of the concrete 7 is lower than 10 ℃, the circulating pump 3 is closed. The flow of the circulating pump 3 is adjustable, and the lowest flow is 100L/min.
The heat-conducting fluid 4 passes through the circulating pump 33 in the heat-conducting fluid storage device 45 and reaches the outer surface or the inner part of the temperature-controllable template 66, the contact area between the heat-conducting fluid 4 and the temperature-controllable template 66 is as large as possible, and the flow rate of the heat-conducting fluid is easy to control and adjust. The heat transfer fluid 4 is preferably a fluid having a large specific heat and an ordinary temperature liquid-liquid phase change material.
In view of the above, the present invention achieves the intended objects.
Claims (8)
1. A intelligent temperature control system for controlling concrete temperature crack, its characterized in that includes: the temperature-controllable template is communicated with the temperature-controllable template through a guide pipe, the circulating pump is arranged on the guide pipe, the temperature sensor is arranged on the temperature-controllable template, and the temperature sensor, the circulating pump and the temperature difference controller are electrically connected.
2. The intelligent temperature control system for controlling the temperature cracks in the concrete according to claim 1, wherein the temperature-controllable formwork comprises a metal plate and a heat-conducting metal pipe fixed on the outer side of the metal plate, the heat-conducting metal pipe is communicated with the flow guide pipe through a pipe opening connecting piece, and the metal plate is made of a metal material with high heat conductivity coefficient, low density and high strength.
3. The intelligent temperature control system for controlling the temperature cracks in the concrete according to claim 2, wherein the heat-conducting metal tubes are distributed on the metal plate in an S shape, and regulating valves are arranged on the heat-conducting metal tubes.
4. The intelligent temperature control system for controlling the temperature crack of concrete according to claim 3, wherein the metal plates comprise two groups, the two groups of metal plates are connected by a fastener, a casting space is formed between the two groups of metal plates, and concrete is cast in the casting space.
5. The intelligent temperature control system for controlling concrete temperature cracks according to claim 4, wherein the temperature sensors comprise an intermediate sensor and an edge sensor, the intermediate sensor is arranged at a central position of the concrete in the casting space, and the edge sensor is arranged on the metal plate.
6. The intelligent temperature control system for controlling concrete temperature cracks of claim 1, wherein the heat transfer fluid storage device comprises a container, a heating device, and a cooling device.
7. The intelligent temperature control system for controlling the temperature cracks in the concrete according to claim 6, wherein a heat-conducting fluid is arranged in the container, and the heat-conducting fluid is selected from a fluid with high specific heat and a normal-temperature phase-change material.
8. The intelligent temperature control system for controlling the temperature cracks of concrete according to claim 1, wherein the temperature difference controller controls the temperature of the circulating pump to be turned off and on within a range of 20 ℃ to 25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010737950.8A CN111908950A (en) | 2020-07-28 | 2020-07-28 | Intelligent temperature control system for controlling concrete temperature cracks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010737950.8A CN111908950A (en) | 2020-07-28 | 2020-07-28 | Intelligent temperature control system for controlling concrete temperature cracks |
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| Publication Number | Publication Date |
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| CN111908950A true CN111908950A (en) | 2020-11-10 |
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| CN202010737950.8A Withdrawn CN111908950A (en) | 2020-07-28 | 2020-07-28 | Intelligent temperature control system for controlling concrete temperature cracks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462818A (en) * | 2020-11-27 | 2021-03-09 | 中国电建集团华东勘测设计研究院有限公司 | Control method for highest temperature region of low-heat cement concrete of high arch dam |
-
2020
- 2020-07-28 CN CN202010737950.8A patent/CN111908950A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462818A (en) * | 2020-11-27 | 2021-03-09 | 中国电建集团华东勘测设计研究院有限公司 | Control method for highest temperature region of low-heat cement concrete of high arch dam |
| CN112462818B (en) * | 2020-11-27 | 2022-03-18 | 中国电建集团华东勘测设计研究院有限公司 | Control method for highest temperature region of low-heat cement concrete of high arch dam |
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Application publication date: 20201110 |