Mass concrete temperature control device and construction method thereof

Abstract

The invention discloses a mass concrete temperature control device and a construction method thereof.The mass concrete temperature control device comprises a numerical control system, a temperature control cover, an inner temperature sensor, an outer temperature sensor, a heating system, a water spraying system and a drainage system, the dual functions of temperature control and concrete curing are combined, and the temperature control cover is arranged to guarantee the humidity and temperature requirements of the temperature control cover; meanwhile, the temperature difference between inside and outside is reduced through a heating method which is different from a cooling mode in the prior art, and the temperature difference can be guaranteed within a reasonable range through the treatment mode.

Description

Technical Field

[0001] The invention relates to the field of mass concrete pouring, and in particular to a mass concrete temperature control device and a construction method thereof. Background Art

[0002] During the pouring of large-volume concrete, it is inevitable that its temperature will become uncontrollable. During the pouring of large-volume concrete, due to the relatively large heat of hydration of cement, a large amount of heat may appear. Since the heat cannot be released as quickly as possible, a huge temperature difference will occur inside and outside. The temperature difference will cause the concrete to crack. At this time, water pipes are generally buried inside the concrete to cool down, but there is a disadvantage, which is that the spatial integrity inside the concrete cannot be guaranteed.

[0003] Therefore, the above problems cannot be solved by cooling the concrete. It is necessary to design a method to ensure that the temperature difference of concrete pouring is small and the allowable value of concrete cracks is reached, such as using the heating method. However, heating will also cause new problems, such as how to ensure the reliability and controllability of temperature. Summary of the invention

[0004] The purpose of the present invention is to provide a large volume concrete temperature control device to solve the existing problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a large volume concrete temperature control device, comprising a numerical control system, a temperature control cover, an internal temperature sensor, an external temperature sensor, a heating system, a water spraying system and a drainage system;

[0006] The heating system includes an air pump, an electric heating device, a plurality of hot air pipes, a plurality of air outlets and a plurality of first solenoid valves, wherein the solenoid valves are connected to a numerical control system and are used to control the number of switches of the air outlets, the air pump is connected to the hot air pipe and passes the gas heated by the electric heating device into the plurality of air outlets, and the electric heating device is controlled by the numerical control system;

[0007] The water spray system includes a water pump, a plurality of water supply pipes, a plurality of water outlets, a plurality of nozzles and a plurality of second solenoid valves; the plurality of second solenoid valves are arranged at the rear ends of the corresponding plurality of nozzles and are used to control the switches of the nozzles; the water pump is connected to the water supply pipe;

[0008] The temperature control cover comprises a bottom frame, a corrugated side ring and a waterproof heat insulation cover, and a breathable valve is arranged on the waterproof heat insulation cover, wherein the bottom frame is used to fix the temperature control cover, and the corrugated side ring can be arranged on the bottom frame in a telescopic manner, and the waterproof cover is integrally connected to the corrugated side ring, and a plurality of first mounting holes and second mounting holes are arranged on the waterproof heat insulation cover, and the first mounting holes and the second mounting holes are both arranged through threaded openings and can be detachably connected through threaded covers; the first mounting holes and the second mounting holes are intermittently arranged, wherein the first mounting holes are used to match a plurality of hot air pipes for connection, and the second mounting holes are used to match the nozzles of a plurality of water supply pipes;

[0009] A plurality of the internal temperature sensors are arranged in a large volume of concrete and evenly spaced during pouring;

[0010] A plurality of external temperature sensors are arranged on the surface of the mass concrete to monitor the surface temperature of the mass concrete and the space temperature of the temperature control cover;

[0011] The internal temperature sensor and the external temperature sensor are both electrically connected to the numerical control system, and the numerical control system simultaneously controls the first solenoid valve of the heating system and the second solenoid valve of the water spraying system. The first solenoid valve is opened to heat the concrete, and the second solenoid valve is opened to cool the concrete or perform curing atomization.

[0012] When pouring concrete, the slope method is adopted, and temperature information is collected while pouring. When pouring large volumes of concrete, a temperature control hood is installed on the large volume of concrete. The temperature control hood realizes the control of the temperature difference between the inside and outside of the concrete and the integration of concrete maintenance.

[0013] The bottom frame includes four foldable plates, a storage tube and an airbag, and a storage tube is installed at the bottom of the plate body. A through-length slit is opened at the bottom of the storage tube. The airbag is arranged in the storage tube. When the airbag is inflated, the internal pressure squeezes it out of the through-length slit and tightly attaches it to the large volume of concrete to be disposed of.

[0014] At least one air hole is arranged on the side of the storage tube, and the inflation valve on the air bag extends out of the air hole and is connected to the air pump.

[0015] The nozzle is set to a spray mode or a mist mode, and the nozzle is connected to the second mounting hole in the form of an external pressure pump.

[0016] In addition, a construction method of a large-volume concrete temperature control device is provided, in which the pouring concrete is temperature-controlled by a temperature control cover, and a numerical control system is used to control different construction stages according to the construction process;

[0017] It is characterized by comprising the following steps:

[0018] Step 1) Installation preparation work: Before pouring large-volume concrete, the internal temperature sensor and electrical connection work are completed in advance. During pouring, the corresponding bottom frame size is made according to the shape of the large-volume concrete to ensure that the airbag can cover the position that needs temperature control;

[0019] Step 2), temperature control operation, when pouring large-volume concrete, the corresponding temperature control cover is constructed, the height can be adjusted through the corrugated side ring, the air bag of the bottom frame is inflated by the air pump, and the air bag seals the large-volume concrete surface to be treated by extrusion, and then the temperature control operation is performed, the average temperature t0 inside the concrete is detected by the internal temperature sensor; and the average temperature t1 outside the concrete is detected by the external temperature sensor; when t0 is greater than t1++10°, the numerical control system starts to work on the heating system, the temperature control cover randomly heats up, and the external temperature sensor detects that the concrete surface is stable, and the temperature rise range is t0++5°t0++10°, t0++15°, t0++20°, and the temperature is dynamically raised every half an hour in a stepwise manner; after the heating is completed, the air valve on the waterproof and heat-insulating cover is closed;

[0020] Step 3), breathing operation, after the heating operation reaches a certain time, the heating operation is, based on the requirements of concrete curing, turning on the water pump switch of the water spray system, at this time the nozzle turns on the water mist mode, and the poured large volume concrete is cured in the water mist mode, and at the same time, the air permeable valve on the waterproof and heat insulation cover is opened to ensure air circulation, which is conducive to the curing and hardening of the large volume concrete;

[0021] Step 4), cooling operation, after the large volume concrete is cured to a certain strength, the temperature control cover needs to be removed based on construction requirements, and the large volume concrete is cooled by the water spray system. The nozzle is switched to the water spray mode, and the temperature of the concrete surface is also cooled in a gradient form, and the cooled water is discharged through the drainage system.

[0022] Step 5), dismantling operation, completing the maintenance and dismantling the temperature control cover.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0024] (1) The present application uses a heating method to achieve precise control of temperature differences, ensuring fewer cracks in concrete pouring. The setting of the temperature control hood is also an improvement based on the temperature control method, which facilitates the completion of construction through automatic control.

[0025] (2) By setting up internal and external temperature sensors, the present application can intuitively compare the temperature difference and temperature rise conditions to achieve dynamic control.

[0026] (3) The present application provides an airbag structure to facilitate achieving a certain closed state at the bottom of the temperature control hood, thereby achieving structural stability, and at the same time utilizing a water spray system to achieve the dual requirements of maintenance and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is the general layout diagram of the present invention;

[0029] Figure 2 is a pipeline plan view of the present invention;

[0030] Figure 3 is a schematic diagram of an air bag of the present invention;

[0031] Figure 4 It is a flow chart diagram of the present invention.

[0032] In the figure: 1, numerical control system; 2, temperature control cover; 21, bottom frame; 22, corrugated side ring; 23, waterproof heat insulation cover; 210, plate; 211, storage tube; 212, air bag; 230, first mounting hole; 231, second mounting hole; 3, internal temperature sensor; 4, external temperature sensor; 5, heating system; 51, air pump; 52, electric heating device; 53, hot air pipe; 54, air outlet 56, first solenoid valve; 6, water spray system; 61, water pump; 62, water supply pipe; 63, water outlet; 64, nozzle; 65, second solenoid valve; DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] A large volume concrete temperature control device, comprising a numerical control system 1, a temperature control cover 2, an internal temperature sensor 3, an external temperature sensor 4, a heating system 5, a water spraying system 6 and a drainage system;

[0035] The heating system 5 includes an air pump 51, an electric heating device 52, a plurality of hot air pipes 53, a plurality of air outlets 54 and a plurality of first electromagnetic valves 56. The electromagnetic valves are connected to the numerical control system 1 and are used to control the number of switches of the air outlets. The air pump 51 is connected to the hot air pipe 53 and passes the gas heated by the electric heating device 52 into the plurality of air outlets 54. The electric heating device 52 is controlled by the numerical control system 1.

[0036] The water spray system 6 includes a water pump 61, a plurality of water supply pipes 62, a plurality of water outlets 63, a plurality of nozzles 64 and a plurality of second solenoid valves 65; the plurality of second solenoid valves 65 are arranged at the rear ends of the corresponding plurality of nozzles 64, and are used to control the opening and closing of the nozzles. The water pump 61 is connected to the water supply pipe 62;

[0037] The temperature control cover 2 includes a bottom frame 21, a corrugated side ring 22 and a waterproof heat insulation cover 23, and a breathable valve is arranged on the waterproof heat insulation cover 23, wherein the bottom frame 21 is used to fix the temperature control cover 2, and the corrugated side ring 22 can be arranged on the bottom frame 21 in a telescopic manner, and the corrugated side ring 22 is integrally connected with the waterproof cover 23, and a plurality of first mounting holes 230 and second mounting holes 231 are arranged on the waterproof heat insulation cover 23, and the first mounting holes 230 and the second mounting holes 231 are both arranged through threaded openings and detachably connected through threaded covers; the first mounting holes 230 and the second mounting holes 231 are intermittently arranged, wherein the first mounting holes 230 are used to match the connection of a plurality of hot air pipes 53, and the second mounting holes 231 are used to match the nozzles 64 of a plurality of water supply pipes 62;

[0038] A plurality of the internal temperature sensors 3 are arranged in a large volume of concrete and are evenly arranged during pouring;

[0039] A plurality of external temperature sensors 4 are arranged on the surface of the mass concrete to monitor the surface temperature of the mass concrete and the space temperature of the temperature control cover 2;

[0040] The internal temperature sensor 3 and the external temperature sensor 4 are both electrically connected to the numerical control system 1. The numerical control system 1 simultaneously controls the first solenoid valve 56 of the heating system 5 and the second solenoid valve 65 of the water spraying system 6. The first solenoid valve 56 is opened to realize the heating operation of the concrete, and the second solenoid valve 65 is opened to realize the cooling of the concrete or the curing atomization.

[0041] When pouring concrete, a slope method is used, and temperature information is collected while pouring. When pouring large-volume concrete, a temperature control cover 2 is installed on the large-volume concrete. The temperature control cover 2 realizes the control of the temperature difference between the inside and outside of the concrete and the integration of concrete maintenance.

[0042] The bottom frame 21 includes four foldable plates 210, a storage tube 211 and an airbag 212, and a storage tube 211 is installed at the bottom of the plate body. A through-length slit is opened at the bottom of the storage tube 211. The airbag 212 is arranged in the storage tube 211. When the airbag 212 is inflated, the internal pressure squeezes it out of the through-length slit and tightly attaches it to the large volume concrete to be disposed.

[0043] At least one air hole is disposed on the side of the storage tube 211 , and an inflation valve on the airbag 212 extends out of the air hole and is connected to the air pump 51 .

[0044] The nozzle 64 is set to a spray mode or a mist mode, and the nozzle 64 is connected to the second mounting hole 231 in the form of an external pressure pump.

[0045] A construction method of a large-volume concrete temperature control device is also provided, wherein the pouring concrete is temperature-controlled by a temperature control cover 2, and a numerical control system 1 is used to control different construction stages according to the construction process;

[0046] The method comprises the following steps: Step 1), installation preparation work, pre-constructing the internal temperature sensor 3 and electrical connection work before pouring the mass concrete, and during pouring, making the corresponding bottom frame 21 size according to the shape of the mass concrete to ensure that the airbag 212 can cover the position requiring temperature control;

[0047] Step 2), temperature control operation, when pouring large-volume concrete, the corresponding temperature control cover 2 is constructed, the height can be adjusted by the corrugated side ring 22, and the air bag 212 of the bottom frame 21 is inflated by the air pump 51. The air bag 212 seals the large-volume concrete surface to be treated by squeezing, and then the temperature control operation is performed. The average temperature t0 inside the concrete is detected by the internal temperature sensor 3; and the average temperature t1 outside the concrete is detected by the external temperature sensor 4; when t0 is greater than t1++10°, the numerical control system 1 starts to work on the heating system 5, and the temperature control cover 2 randomly heats up. The external temperature sensor 4 detects that the concrete surface is stable, and the temperature rise range is t0++5°t0++10°, t0++15°, t0++20°, and the temperature is dynamically raised every half an hour in a stepwise manner; after the heating is completed, the air valve on the waterproof and heat-insulating cover 23 is closed;

[0048] Step 3), breathing operation, after the heating operation reaches a certain time, the heating operation is, based on the requirements of concrete curing, turning on the water pump 61 switch of the water spray system 6, at this time the nozzle 64 turns on the water mist mode, and the poured large volume concrete is cured in the water mist mode, and at the same time, the air permeable valve on the waterproof and heat-insulating cover 23 is opened to ensure air circulation, which is conducive to the curing and hardening of the large volume concrete;

[0049] Step 4), cooling operation. After the mass concrete is cured to a certain strength, the temperature control cover 2 needs to be removed based on construction requirements, and the mass concrete is cooled by the water spraying system 6. The nozzle 64 is switched to the water spraying mode, and the temperature of the concrete surface is also cooled in a gradient form, wherein the cooled water is discharged through the drainage system.

[0050] Step 5), dismantling operation, completing the maintenance and dismantling the temperature control cover 2.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mass concrete temperature control device, comprising a numerical control system (1), a temperature control cover (2), an internal temperature sensor (3), an external temperature sensor (4), a heating system (5), a water spraying system (6) and a drainage system; The heating system (5) comprises an air pump (51), an electric heating device (52), a plurality of hot air pipes (53), a plurality of air outlets (54) and a plurality of first electromagnetic valves (56); the electromagnetic valves (56) are connected to the numerical control system (1) and are used to control the number of openings and closings of the air outlets; the air pump (51) is connected to the hot air pipes (53) and passes the gas heated by the electric heating device (52) into the plurality of air outlets (54); and the electric heating device (52) is controlled by the numerical control system (1); The water spray system (6) comprises a water pump (61), a plurality of water supply pipes (62), a plurality of water outlets (63), a plurality of nozzles (64) and a plurality of second electromagnetic valves (65); the plurality of second electromagnetic valves (65) are arranged at the rear ends of the corresponding plurality of nozzles (64) and are used to control the opening and closing of the nozzles; the water pump (61) is connected to the water supply pipe (62); The temperature control cover (2) comprises a bottom frame (21), a corrugated side ring (22) and a waterproof heat insulation cover (23), wherein the waterproof heat insulation cover (23) is provided with a breathable valve, wherein the bottom frame (21) is used to fix the temperature control cover (2), the corrugated side ring (22) is arranged on the bottom frame (21) in a telescopic manner, and the corrugated side ring (22) is integrally connected to the waterproof cover (23), and the waterproof heat insulation cover (23) is provided with a plurality of first mounting holes (230) and second mounting holes (231), and the first mounting holes (230) and the second mounting holes (231) are both provided with threaded openings and are detachably connected through threaded covers; the first mounting holes (230) and the second mounting holes (231) are intermittently arranged, wherein the first mounting holes (230) are used to match the connection with a plurality of hot air pipes (53), and the second mounting holes (231) are used to match the nozzles (64) of a plurality of water supply pipes (62); A plurality of the internal temperature sensors (3) are arranged in a large volume of concrete and are evenly spaced during pouring; A plurality of external temperature sensors (4) are arranged on the surface of the mass concrete to monitor the surface temperature of the mass concrete and the spatial temperature of the temperature control cover (2); The internal temperature sensor (3) and the external temperature sensor (4) are both electrically connected to the numerical control system (1). The numerical control system (1) simultaneously controls the first electromagnetic valve (56) of the heating system (5) and the second electromagnetic valve (65) of the water spraying system (6). When the first electromagnetic valve (56) is opened, the temperature of the concrete is increased. When the second electromagnetic valve (65) is opened, the temperature of the concrete is decreased or atomized for curing. When pouring concrete, a slope method is used, and temperature information is collected while pouring. When pouring large-volume concrete, a temperature control cover (2) is installed on the large-volume concrete. The temperature control cover (2) realizes the control of the temperature difference between the inside and outside of the concrete and the integration of concrete curing.

2. A mass concrete temperature control device according to claim 1, characterized in that: The bottom frame (21) comprises four foldable plates (210), a storage tube (211) and an air bag (212), and a storage tube (211) is correspondingly installed at the bottom of the plate, a through-length slit is opened at the bottom of the storage tube (211), and the air bag (212) is arranged in the storage tube (211). When the air bag (212) is inflated, the internal pressure squeezes it out of the through-length slit and tightly fits on the large volume of concrete to be disposed.

3. A mass concrete temperature control device according to claim 2, characterized in that: At least one air hole is arranged on the side of the storage tube (211), and the inflation valve on the air bag (212) extends out of the air hole and is connected to the air pump (51).

4. A mass concrete temperature control device according to claim 2, characterized in that: The nozzle (64) is set to a spray mode or a mist mode, and the nozzle (64) is connected to the second mounting hole (231) in the form of an external pressure pump.

5. A construction method for a large volume concrete temperature control device according to any one of claims 1 to 4, wherein the pouring concrete is temperature controlled by a temperature control cover (2), and different construction stages are controlled according to the construction process by a numerical control system (1); It is characterized in that The method comprises the following steps: step 1), installation preparation work, pre-constructing the internal temperature sensor (3) and electrical connection work before pouring the large volume concrete, and during pouring, making the corresponding bottom frame (21) size according to the shape of the large volume concrete to ensure that the airbag (212) can cover the position requiring temperature control; Step 2), temperature control operation, when pouring large-volume concrete, the corresponding temperature control cover (2) is constructed, and the height can be adjusted through the corrugated side ring (22), and the air bag (212) of the bottom frame (21) is inflated by the air pump (51), and the air bag (212) seals the large-volume concrete surface to be treated by squeezing, and then the temperature control operation is performed, and the average temperature t0 inside the concrete is detected by the internal temperature sensor (3); and the average temperature t1 outside the concrete is detected by the external temperature sensor (4); when t0 is greater than t1+10°, the numerical control system (1) starts to operate the heating system (5), and the temperature control cover (2) randomly heats up. The external temperature sensor (4) detects that the concrete surface is stable, and the temperature rise range is t0+5°t0+10°, t0+15°, t0+20°, and the temperature is dynamically raised every half an hour in a stepwise manner; after the temperature rise is completed, the air valve on the waterproof and heat-insulating cover (23) is closed; Step 3), breathing operation, after the heating operation reaches a certain time, the heating operation is, based on the requirements of concrete curing, turning on the water pump (61) switch of the water spray system (6), at this time the nozzle (64) turns on the water mist mode, and the poured large volume concrete is cured in the water mist mode, and at the same time the air permeable valve on the waterproof and heat-insulating cover (23) is opened to ensure air circulation, which is beneficial to the curing and hardening of the large volume concrete; Step 4), cooling operation. After the mass concrete is cured to a certain strength, the temperature control cover (2) needs to be removed based on construction requirements, and the mass concrete is cooled by the water spraying system (6). The nozzle (64) is switched to the water spraying mode, and the temperature of the concrete surface is cooled in a gradient manner. The cooled water is discharged through the drainage system. Step 5), dismantling operation, after completing the maintenance, the temperature control cover (2) is dismantled.

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