CN107010993B - Cooling system for mass concrete - Google Patents
Cooling system for mass concrete Download PDFInfo
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- CN107010993B CN107010993B CN201710338613.XA CN201710338613A CN107010993B CN 107010993 B CN107010993 B CN 107010993B CN 201710338613 A CN201710338613 A CN 201710338613A CN 107010993 B CN107010993 B CN 107010993B
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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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Abstract
The invention discloses a cooling system, in particular discloses a cooling system for mass concrete, and belongs to the technical field of design and manufacture of building construction process equipment. The cooling system for the large-volume concrete can effectively control the temperature of the large-volume concrete in the pouring and condensing process. The cooling system comprises a refrigerant storage device, a refrigerant conveying regulation and control mechanism and a heat exchange structure, wherein a cooling refrigerant is arranged in the refrigerant storage device, the heat exchange structure is arranged in mass concrete needing cooling, and the cooling refrigerant stored in the refrigerant storage device circulates between the heat exchange structure and the refrigerant storage device through the refrigerant conveying regulation and control mechanism.
Description
Technical Field
The invention relates to a cooling system, in particular to a cooling system for mass concrete, and belongs to the technical field of design and manufacture of construction process equipment.
Background
With the vigorous construction of new local areas in China, the development climax of various super high-rise buildings is met, the consumption of basic concrete is thousands to ten thousand cubic meters, the concrete volume is large, the consumption of cement is high, the hydration heat of the cement can cause the internal temperature of the concrete to obviously rise after the concrete is poured, the highest temperature can reach 90 ℃, the heat dissipation of the surface of the concrete is relatively quick, the internal and external temperature difference is formed, when the internal and external absolute temperature difference exceeds 25 ℃, temperature cracks are generated in the internal and the surface of the concrete, and the cracks gradually develop into through cracks along with the extension of the age of the concrete, so that the strength and the durability of the structure are directly reduced, and the structure safety of the building is influenced.
At present, there are two types of methods for controlling the temperature of mass concrete: the first kind is a raw material control method, which reduces the temperature of the hydration heat of the concrete by selecting low-heat portland cement, slag cement and the like, or controls the adiabatic temperature rise amplitude and the mold-entering temperature of the concrete by optimizing the mixing proportion of the concrete and reducing the mixing temperature; the second type is a method of arranging cooling water pipes, and cold water is used for absorbing hydration heat of concrete to control the maximum temperature of the concrete.
The first method has higher cost of low hydration heat cement, and can achieve better control effect by the auxiliary implementation of the second method; in the second method, when the volume of the concrete pouring block is small, the temperature stress is small, and the temperature stress of the concrete block can be effectively controlled by using the cooling water pipe. However, as the volume of the concrete pouring block increases, the capability of the cooling water pipe for controlling the temperature rise of the concrete is reduced, and the cooling effect is greatly reduced due to the factors of unreasonable arrangement of the cold water pipe, untimely treatment of circulating water and the like.
Therefore, the intensive research is carried out aiming at the temperature control technology of the mass concrete, and reasonable preventive measures and solutions are provided, so that the technical problems which need to be solved by technical personnel in the field at present are solved for promoting the development speed of the building construction technology in China and improving the engineering quality.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the cooling system for the large-volume concrete can effectively control the temperature of the large-volume concrete in the pouring and condensing process.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a cooling system for bulky concrete, cooling system include refrigerant storage device, refrigerant transport control mechanism and heat transfer structure refrigerant storage device in arranged the cooling refrigerant, heat transfer structure arrange in the bulky concrete that needs carry out cooling, the storage is in the cooling refrigerant in the refrigerant storage device passes through refrigerant transport control mechanism be in heat transfer structure with refrigerant storage device between circulate.
The invention has the beneficial effects that: this application is through setting up one set and including refrigerant storage device, refrigerant transport regulation and control mechanism and heat transfer structure's cooling system, and refrigerant storage device in arranged the cooling refrigerant, then will heat transfer structure arrange in the bulky concrete that needs carry out cooling. Therefore, when the temperature difference between the inside and the outside of the bulk concrete needs to be controlled, the cooling refrigerant stored in the refrigerant storage device can circulate between the heat exchange structure and the refrigerant storage device through the refrigerant conveying and regulating mechanism, so that the heat inside the bulk concrete is taken away through the refrigerant, and the temperature difference between the inside and the outside of the bulk concrete is controlled within a certain range.
Furthermore, the refrigerant storage device is a circulating cooling water storage tank comprising a temperature adjusting structure, the cooling refrigerant is circulating cooling water, the circulating cooling water arranged in the circulating cooling water storage tank is adjusted in temperature through the temperature adjusting structure, and the circulating cooling water qualified in temperature adjustment is circulated between the heat exchange structure and the circulating cooling water storage tank through the refrigerant conveying and adjusting mechanism.
The preferred mode of above-mentioned scheme is, the structure that adjusts the temperature including setting up the ice-cube bin of recirculated cooling water saving pond top ice-cube bin in store the ice-cube bin and adjust the temperature ice-cube, the ice-cube bin through its bottom with recirculated cooling water saving pond intercommunication.
Furthermore, the refrigerant conveying regulation and control mechanism comprises a conveying pipe system and a refrigerant driving assembly connected in series with the conveying pipe system, the refrigerant conveying regulation and control mechanism connects the refrigerant storage device and the heat exchange structure in series through the conveying pipe system to form a circulation loop, and the cooling refrigerant in the circulation loop is driven by the refrigerant driving assembly to circularly flow in the circulation loop.
The refrigerant driving assembly is connected in series to the input pipe, the return pipe is connected in series between the refrigerant output end of the heat exchange structure and the refrigerant storage device, and the input pipe is connected in series between the refrigerant input end of the heat exchange structure and the refrigerant storage device.
Furthermore, the refrigerant driving component is at least one centrifugal pump connected in series with the input pipe, each centrifugal pump is respectively provided with a power device, and the input pipe and the return pipe are respectively connected in series with a control valve.
The heat exchange structure comprises a medium inlet adapter, a heat exchange tube and a medium outlet adapter, wherein two ends of the heat exchange tube are respectively connected with the medium inlet adapter and the medium outlet adapter, the heat exchange structure is embedded in mass concrete needing cooling through the heat exchange tube, the medium inlet adapter is connected with an input tube of the conveying pipe system, and the medium outlet adapter is connected with a return tube of the conveying pipe system.
Drawings
Fig. 1 is a schematic structural diagram of a cooling system for mass concrete according to the present invention.
Labeled as: the device comprises a refrigerant storage device 1, a refrigerant conveying and regulating mechanism 2, a heat exchange structure 3, large-volume concrete 4, a temperature regulating structure 5, a circulating cooling water storage tank 6, a conveying pipe system 7, a refrigerant driving assembly 8, an input pipe 9, a return pipe 10, a control valve 11, a medium inlet adapter 12, a heat exchange pipe 13 and a medium outlet adapter 14.
Detailed Description
Fig. 1 shows a cooling system for large-volume concrete, which can effectively control the temperature of the large-volume concrete during the casting condensation process. The cooling system comprises a refrigerant storage device 1, a refrigerant conveying regulating mechanism 2 and a heat exchange structure 3, wherein a cooling refrigerant is arranged in the refrigerant storage device 1, the heat exchange structure 3 is arranged in mass concrete 4 needing cooling, and the cooling refrigerant stored in the refrigerant storage device 1 circulates between the heat exchange structure 3 and the refrigerant storage device 1 through the refrigerant conveying regulating mechanism 2. This application is through setting up one set and including refrigerant storage device 1, refrigerant transport control mechanism 2 and heat transfer structure 3's cooling system, and refrigerant storage device 1 in arranged the cooling refrigerant, then will heat transfer structure 2 arrange in the bulky concrete 4 that needs carry out cooling. Therefore, when the temperature difference between the inside and the outside of the bulk concrete 4 needs to be controlled, the cooling refrigerant stored in the refrigerant storage device 1 can circulate between the heat exchange structure 3 and the refrigerant storage device 1 through the refrigerant conveying regulation and control mechanism 2, so that the heat inside the bulk concrete 4 is taken away through the refrigerant, and the purpose of controlling the temperature difference between the inside and the outside of the bulk concrete 4 within a certain range is achieved.
In the above embodiment, the refrigerant storage device 1 may have different structures according to different cooling refrigerants. In order to reduce this application cooling system's manufacturing to and the running cost, this application provides refrigerant storage device 1 is for including the recirculated cooling water saving tank 6 that adjusts the temperature structure 5, this application the cooling refrigerant be recirculated cooling water, like this, arrange recirculated cooling water in the recirculated cooling water saving tank 6 passes through the structure 5 that adjusts the temperature adjust its temperature, the qualified recirculated cooling water of temperature adjustment passes through the refrigerant carry control mechanism 2 and be in heat transfer structure 3 with recirculated cooling water saving tank 6 between circulate. With this adaptation, the structure 5 that adjusts the temperature of this application just sets to including setting up the structure of the ice-cube bin of recirculated cooling water saving pond 6 top to the ice-cube bin in store and adjust the temperature ice-cube, the ice-cube bin through its bottom with recirculated cooling water saving pond 6 intercommunication. Like this, when needs reduce the inside temperature of bulky concrete 4 fast, alright contain the ice content in the aquatic of circulated water through the quantity control of the ice-cube that adds, and then reach the purpose of controlling the inside and outside difference in temperature of bulky concrete 4 as required.
Furthermore, in order to adapt to the condition that the ice medium is the circulating cooling water, the refrigerant conveying regulating and controlling mechanism 2 comprises a conveying pipe system 7 and a refrigerant driving assembly 8 connected in series with the conveying pipe system 7, the refrigerant conveying regulating and controlling mechanism 2 connects the refrigerant storage device 1 and the heat exchange structure 3 in series through the conveying pipe system 7 to form a circulating loop, and the cooling refrigerant in the circulating loop circularly flows in the circulating loop through the driving of the refrigerant driving assembly 8. The conveying pipe system 7 comprises an input pipe 9 and a return pipe 10, the refrigerant driving assembly 8 is connected in series to the input pipe 9, the return pipe 10 is connected in series between the refrigerant output end of the heat exchange structure 3 and the refrigerant storage device 1, and the input pipe 9 is connected in series between the refrigerant input end of the heat exchange structure 3 and the refrigerant storage device 1. The refrigerant driving component 8 is at least one centrifugal pump connected in series to the input pipe 9, each centrifugal pump is respectively provided with a power device, and the input pipe 9 and the return pipe 10 are respectively connected in series to a control valve 11.
Simultaneously, this application still provides the structure 5 that adjusts temperature that suits with above-mentioned structure of this application, promptly heat exchange structure 3 including advancing media crossover sub 12, heat exchange tube 13 and play media crossover sub 14, the both ends of heat exchange tube 13 respectively with advance media crossover sub 12 with play media crossover sub 14 be connected, heat exchange structure 3 pass through heat exchange tube 13 bury underground in the bulky concrete 4 that needs carry out cooling, advance media crossover sub 12 with the input tube 9 of conveying piping 7 is connected, play media crossover sub 14 with the back flow 10 of conveying piping 7 is connected.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the temperature control adjusting measures adopted by the invention adjust the temperature of the circulating water in the circulating water tank by adding ice blocks or other heat dissipation equipment, can dynamically adjust the water temperature of the cooling water, and greatly improve the cooling effect of the cooling water pipe, thereby effectively controlling the temperature difference between the inside and the outside of the concrete to avoid generating temperature cracks.
2. The cooling water pipe control system adopted by the invention selectively adjusts the water flow of the cooling water pipes of different horizontal layers by controlling the valve switch, and controls the local temperature of the concrete in a targeted manner so as to control the internal and external temperature difference of the mass concrete to meet the specification and design requirements, thereby limiting the local generation of harmful cracks in the concrete.
3. The circulating cooling control system adopted by the invention has the advantages of simple structure, reasonable design, convenient construction and lower construction cost, and is a green, economic and environment-friendly concrete cooling control method.
Example one
The implementation of the invention comprises the following steps:
1. site arrangement: and (3) building the circulating water tank 2 according to a construction site, wherein the size and the depth of the circulating water tank 2 are determined according to the site size and the water consumption.
2. Burying a cooling water pipe: and calculating the using amount of the cooling water pipe 8 of each plane layer according to the concrete pouring amount, and embedding the cooling water pipe 8 in the concrete foundation 9 according to the design requirement.
3. Installing a control valve: a control valve 7 is installed at the water inlet of each cooling water pipe 8, and whether the cooling water pipe is normally used or not is checked.
4. Installing a conversion iron pipe: after the control valve 7 is installed, holes are reserved in the conversion iron pipe 6 according to the diameter of the cooling water pipe 8 and the number of the interfaces, and the cooling water pipe 8 is welded to the conversion iron pipe 6 on site.
5. Installing a centrifugal pump: the centrifugal pump 5 is connected to the outlet pipe 4.
6. Connecting a water outlet pipe and a water return pipe: the water outlet pipe 4 and the water return pipe 10 are respectively connected to the conversion iron pipe 6 and are sealed by water stop rubber.
7. Debugging: the underground water is pumped into the circulating water pool 2 through the water inlet pipe 1, the power supply is switched on, the centrifugal pump 5 is started, and whether the cooling water pipe 8 is normally filled with water is checked.
8. Starting the system: and after normal debugging, pouring concrete, and starting the circulating cooling control system when the difference value of the internal temperature and the external temperature of the concrete exceeds 25 ℃.
9. A regulating system: and dynamically adjusting the temperature of the circulating water and switching on and off each control valve according to the actual temperature difference.
10. And (4) terminating the system: when the difference between the internal temperature and the external temperature of the concrete is not more than 25 ℃, the circulating cooling control system is stopped.
As a further improvement scheme of the invention, the material specification of the cooling water pipe is a seamless steel pipe with the diameter of 48.3mm and the wall thickness of 3.5mm, and the distance between the port of the cooling water pipe and the surface of concrete is 1 m.
As a further improvement scheme of the invention, the water outlet pipe and the water return pipe adopt a DN100 PPR water pipe.
As a further improvement scheme of the invention, in the debugging process, each control valve needs to be opened and closed by adopting a single-factor control method to check whether each cooling water pipe loop normally passes water.
As a further improvement scheme of the invention, in the adjusting system, when the temperature of the circulating water in the circulating water tank is too high and cannot reach the cooling effect, ice blocks or other heat dissipation equipment can be added to change the temperature of the circulating water in the water tank and dynamically adjust the temperature of the circulating water in the cooling water pipe.
As a further improvement of the invention, in the adjusting system, according to the temperature displayed by the temperature sensor buried in the mass concrete, when the temperature at a certain local position is overhigh, the water flows of the cooling water pipes at different horizontal layers can be selectively adjusted by controlling a valve switch, so that the local temperature of the concrete is controlled in a targeted manner.
As a further improvement of the invention, in the termination system, the difference between the internal temperature and the external temperature of the concrete does not exceed 25 ℃, namely the difference between the temperature of the concrete and the temperature of the concrete which is not higher than 25 ℃ is measured by the temperature monitoring value, and the difference between the temperature of the concrete and the temperature of the concrete which is not higher than 25 ℃ is measured in three consecutive.
Claims (2)
1. The utility model provides a cooling system for bulky concrete which characterized in that: the cooling system comprises a refrigerant storage device (1), a refrigerant conveying regulating mechanism (2) and a heat exchange structure (3), wherein a cooling refrigerant is arranged in the refrigerant storage device (1), the heat exchange structure (3) is arranged in mass concrete (4) needing cooling, the cooling refrigerant stored in the refrigerant storage device (1) circulates between the heat exchange structure (3) and the refrigerant storage device (1) through the refrigerant conveying regulating mechanism (2),
the cooling medium storage device (1) is a circulating cooling water storage tank (6) comprising a temperature adjusting structure (5), the cooling medium is circulating cooling water, the circulating cooling water arranged in the circulating cooling water storage tank (6) adjusts the temperature of the circulating cooling water through the temperature adjusting structure (5), the circulating cooling water with qualified temperature adjustment circulates between the heat exchange structure (3) and the circulating cooling water storage tank (6) through the cooling medium conveying and adjusting mechanism (2),
the refrigerant conveying regulating mechanism (2) comprises a conveying pipe system (7) and a refrigerant driving assembly (8) connected with the conveying pipe system (7) in series, the refrigerant storage device (1) and the heat exchange structure (3) are connected in series into a circulation loop through the conveying pipe system (7) by the refrigerant conveying regulating mechanism (2), a cooling refrigerant in the circulation loop circularly flows in the circulation loop through the driving of the refrigerant driving assembly (8),
the heat exchange structure (3) comprises a medium inlet adapter (12), a heat exchange pipe (13) and a medium outlet adapter (14), two ends of the heat exchange pipe (13) are respectively connected with the medium inlet adapter (12) and the medium outlet adapter (14), the heat exchange structure (3) is embedded in mass concrete (4) needing cooling through the heat exchange pipe (13), the medium inlet adapter (12) is connected with an input pipe (9) of the conveying pipe system (7), the medium outlet adapter (14) is connected with a return pipe (10) of the conveying pipe system (7),
the refrigerant driving assembly (8) is at least one centrifugal pump connected in series with the input pipe (9), each centrifugal pump is respectively provided with a power device, the input pipe (9) and the return pipe (10) are respectively connected in series with a control valve (11), each layer of heat exchange pipes (13) distributed in the mass concrete in a layered mode can selectively adjust the water flow of the heat exchange pipes (13) in different horizontal layers according to the temperature displayed by a temperature sensor embedded in the mass concrete under the control of the switch of the control valve (11) so as to locally control the temperature of the mass concrete,
temperature adjusting structure (5) including setting up the ice-cube bin of recirculated cooling water saving pond (6) top ice-cube bin in store and adjust the temperature ice-cube, the ice-cube bin through its bottom with recirculated cooling water saving pond (6) intercommunication.
2. The cooling system for bulk concrete according to claim 1, wherein: the conveying pipe system (7) comprises an input pipe (9) and a return pipe (10), the refrigerant driving assembly (8) is connected to the input pipe (9) in series, the return pipe (10) is connected between the refrigerant output end of the heat exchange structure (3) and the refrigerant storage device (1) in series, and the input pipe (9) is connected between the refrigerant input end of the heat exchange structure (3) and the refrigerant storage device (1) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338613.XA CN107010993B (en) | 2017-05-15 | 2017-05-15 | Cooling system for mass concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338613.XA CN107010993B (en) | 2017-05-15 | 2017-05-15 | Cooling system for mass concrete |
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| CN107010993A CN107010993A (en) | 2017-08-04 |
| CN107010993B true CN107010993B (en) | 2021-06-04 |
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| CN108049644B (en) * | 2017-11-24 | 2020-09-08 | 中国建筑第八工程局有限公司 | Large-volume concrete double-condensing loop temperature control equipment and temperature control method thereof |
| CN109678558B (en) * | 2018-12-06 | 2021-06-22 | 天津五洲同创空调制冷设备有限公司 | A cooling processing apparatus for oil depot building cement is pour |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20080016894A1 (en) * | 2006-07-07 | 2008-01-24 | Wiggs B R | Advanced Direct Exchange Geothermal Heating/Cooling System Design |
| US8082751B2 (en) * | 2007-11-09 | 2011-12-27 | Earth To Air Systems, Llc | DX system with filtered suction line, low superheat, and oil provisions |
| CN202854601U (en) * | 2012-08-22 | 2013-04-03 | 清华大学 | Water-through intelligent temperature control testing system |
| CN204662448U (en) * | 2015-05-13 | 2015-09-23 | 陈志刚 | Building the intelligent water-cooled system of concrete in mass |
| CN205502594U (en) * | 2016-04-06 | 2016-08-24 | 中铁十二局集团第一工程有限公司 | Cooling system based on bulky concrete |
| CN206157242U (en) * | 2016-09-23 | 2017-05-10 | 有研亿金新材料有限公司 | Electrolyte cooling system |
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