Large-volume concrete cooling system

Abstract

The invention belongs to the technical field of building engineering construction, and particularly relates to a mass concrete cooling system which comprises a concrete body and a cooling pipeline arranged in the concrete body, and the cooling pipeline comprises a plurality of first pipelines and second pipelines coaxially arranged in the first pipelines. The inner wall of the first pipeline and the outer surface of the second pipeline jointly form a first cooling channel, a second cooling channel is arranged in the second pipeline, the two ends of each first cooling channel communicate with a cooling pond and a recycling pond correspondingly, and the two ends of each second cooling channel communicate with the cooling pond and the recycling pond. A reversing shell is arranged at the length center of each cooling pipeline, and four connectors which correspond in pairs and communicate with one another are formed in the surface of each reversing shell. The problems that when mass concrete is cooled at present, after cooling water enters the concrete to absorb heat, the subsequent concrete cannot be effectively and uniformly cooled, and the cooling efficiency is high can be effectively solved. And the cooling effect is poor.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering construction, and particularly relates to a large volume concrete cooling system. Background Art

[0002] The cement in the concrete reacts with water to generate hydration products. This process is called hydration reaction. The hydration reaction is exothermic, that is, heat is released during the reaction process, resulting in an increase in the temperature inside the concrete, which in turn generates temperature difference stress, which may cause problems such as concrete cracking. At present, the method of artificially spraying cooling water is generally used for temperature control. By sprinkling water on the concrete surface, the temperature of the concrete surface can be reduced, the temperature difference between the inside and outside of the concrete can be reduced, and the crack problem caused by temperature stress can be reduced. However, this method is inefficient and difficult to accurately control. In order to improve the efficiency of concrete cooling, for example, a Chinese patent discloses a large-volume concrete cooling method (patent announcement number: CN118495988A). The layered cooling water pipe group solves the cracks caused by the internal and external temperature difference during the hardening process of the large-volume concrete structure, ensures uniform cooling inside the concrete, avoids the conflict between the cooling water pipe and the structural steel bar, greatly improves the construction quality of the large-volume concrete, and reduces the rework rate; at the same time, the present invention realizes concrete maintenance through a detachable nozzle, without the need for manual spraying by construction personnel, and at the same time, the nozzle can be used in turn during the construction of different projects, reducing the construction cost.

[0003] Although the above technical solution can effectively solve the current heat dissipation problem of the inner and outer surfaces of concrete, in actual use, the heat generated inside the large-volume concrete is usually unevenly distributed. For example, on the straight line from the center of the large-volume concrete to the outer surface, the temperature should gradually decrease, because the closer to the outside world, the easier it is to exchange heat with external gases or substances and dissipate heat. After the cooling water in the above technical solution enters the concrete, it needs to exchange heat with concrete at different heights. This will cause the cooling water that has been heated to no longer have a cooling function, resulting in the failure to cool it when it passes through different concrete positions later, ultimately resulting in poor cooling effect and uneven cooling of the cooling water. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a large-volume concrete cooling system to solve the problem that when cooling large-volume concrete, cooling water enters the concrete to absorb heat and cannot effectively and evenly cool the subsequent concrete, resulting in poor cooling effect.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A large volume concrete cooling system comprises a concrete body and a cooling pipeline arranged inside the concrete body, wherein the cooling pipeline comprises a plurality of first pipelines arranged at intervals along the length direction of the concrete body and a second pipeline coaxially arranged inside the first pipeline, wherein each of the first pipelines meanders multiple times in a horizontal plane, the diameter of the first pipeline is larger than that of the second pipeline, and the inner wall of the first pipeline and the outer surface of the second pipeline together form an annular first cooling passage, the second pipeline is hollow inside and is provided with a second cooling passage, and the two ends of each first cooling passage are respectively connected to a cooling pool and a recovery pool located outside the concrete body, and the two ends of each second cooling passage are also connected to the cooling pool and the recovery pool, and a reversing shell for reversing the flow direction of the water flow inside the cooling pipeline is provided at the length center of each cooling pipeline, and the surface of the reversing shell is provided with four interfaces corresponding to each other and connected to each other, and the four interfaces are respectively connected to two adjacent first cooling passages and two second cooling passages, and when the liquid in the first cooling passage flows through the reversing shell through the interface connected thereto, it will flow into the second cooling passage through another interface connected thereto, so as to realize the conversion of the water flow inside the cooling pipeline from the first cooling passage to the second cooling passage.

[0007] Furthermore, each of the cooling pipelines is disconnected and spaced apart at the center of its length, and both end faces are connected to the reversing shell. The surface of each of the reversing shells is provided with four interfaces respectively connected to the adjacent first cooling passage and the second cooling passage, and corresponding interfaces on the two reversing shells are connected with hoses. A protective shell is provided at the disconnected interval at the center of the length of the cooling pipeline. The protective shell is cylindrical and coaxially fixed outside the two reversing shells.

[0008] Furthermore, a plurality of groups of cooling pipelines are arranged at intervals along the height direction of the concrete body, and the first cooling passages in each group of cooling pipelines are connected to a cooling pool arranged outside the concrete body, and the second cooling passages are connected to a recovery pool arranged outside the concrete body, wherein a plurality of liquid storage chambers are separated in the cooling pool, and each of the liquid storage chambers is provided with a first refrigeration device for controlling the temperature of the coolant, and each of the liquid storage chambers is connected to the corresponding first cooling passage, and coolants of different temperatures are used to cool the cooling pipelines according to their different positions in the concrete body.

[0009] Furthermore, a plurality of first temperature sensors are fixedly connected to the outer surface of each cooling pipeline, and the first temperature sensors are arranged at intervals along the length direction of the cooling pipeline. A second temperature sensor for monitoring the coolant temperature is provided in each liquid storage chamber, and each of the first temperature sensor, the second temperature sensor, the high-pressure water pump and the first refrigeration device is electrically connected to a controller.

[0010] Furthermore, the recovery pool is interconnected with each cooling chamber, a second refrigeration device is provided in the recovery pool, and a third temperature sensor is provided in the recovery pool, and the third temperature sensor and the second refrigeration device are both electrically connected to the controller.

[0011] Furthermore, the upper surface of the concrete body is provided with a plurality of watering pipes arranged along the length direction thereof, each of the watering pipes is communicated with a corresponding liquid storage chamber, and the sprayed coolant covers the entire upper surface of the concrete body.

[0012] Furthermore, each of the first pipes is made of a material with a high thermal conductivity, and each of the second pipes is made of a material with a low thermal conductivity.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention arranges a plurality of cooling pipelines evenly spaced along the height and length directions of the concrete body, and arranges a first cooling passage and a second cooling passage in each cooling pipeline to reduce the flow length of the coolant inside the concrete body, thereby reducing the heat exchange time between the coolant and the concrete body. Subsequently, the flow paths of the coolant in the first cooling passage and the second cooling passage are swapped by a reversing shell, so that the coolant can effectively ensure the heat absorption efficiency of the coolant while reducing the heat exchange time with the concrete, and effectively prevent the problem that the coolant cannot continue to cool down after absorbing heat and heating up; and through the mutual cooperation of multiple cooling chambers and refrigeration equipment, it is possible to use coolants of different temperatures at different positions in the concrete body, and achieve uniform cooling of the entire concrete body.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 It is a schematic diagram of the overall structure of the concrete body of the present invention;

[0018] Figure 2 It is a partial cross-sectional view of the concrete body of the present invention;

[0019] Figure 3 The internal structure of the protective housing of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 4 The internal structure of the protective housing of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 5 It is a schematic diagram of the structure of the reversing housing of the present invention.

[0022] The following are marked in the accompanying drawings:

[0023] 1 concrete body, 2 cooling pipeline, 201 first pipeline, 202 second pipeline, 203 first cooling passage, 204 second cooling passage, 3 recovery pool, 4 cooling pool, 5 reversing shell, 6 protection shell, 7 hose, 8 sprinkler pipe. DETAILED DESCRIPTION

[0024] like Figure 1 to Figure 5 As shown,

[0025] A large volume concrete cooling system comprises a concrete body 1 and a cooling pipeline 2 horizontally arranged inside the concrete body 1, wherein the cooling pipeline 2 comprises a plurality of first pipelines 201 spaced apart along the length direction of the concrete body 1 and a second pipeline 202 coaxially arranged inside the first pipeline 201 (only two cooling pipelines along the length of the concrete body are shown in the figure), wherein each of the first pipelines 201 meanders multiple times in a horizontal plane and contacts most of the concrete in the plane where it is located, the diameter of the first pipeline 201 is larger than that of the second pipeline 202, and the inner wall of the first pipeline 201 and the outer surface of the second pipeline 202 together form an annular first cooling passage 203, which is used to convey water flow to cool the concrete body 1, the second pipeline 202 is hollow inside and is provided with a second cooling passage 204 for conveying water flow, and the two ends of each first cooling passage 203 are respectively connected to a cooling pool 4 and a recovery pool 3 located outside the concrete body 1, and the two ends of each second pipeline 202 are also connected to the cooling pool 4 and the recovery pool 3, and the cooling pool 4 is filled with a coolant and a temperature control device for adjusting the temperature of the coolant The equipment (not shown in the figure, the coolant can be water or other known liquids for cooling), the recovery pool 3 is used to recover the coolant that has been heat exchanged with the concrete body 1, of course, the first cooling passage 203 and the second cooling passage 204 are connected to a high-pressure water pump (not shown in the figure), and the center of the length of each cooling pipeline 2 is connected to a reversing shell 5 for changing the flow direction of the water flow inside it. The surface of the reversing shell 5 is provided with four interfaces, and the four interfaces are divided into two groups, and the two corresponding interfaces are connected to each other. The interfaces are respectively connected to the two adjacent first cooling passages 203 and the two second cooling passages 204, and when the liquid in the first cooling passage 203 flows through the reversing housing 5 through the interface connected thereto, it will flow into the second cooling passage 204 through another interface corresponding thereto and connected thereto, so as to realize the conversion of the water flow inside the cooling pipeline 2 from the first cooling passage 203 to the second cooling passage 204. Similarly, after the water flow from the second pipeline 202 passes through the reversing housing 5, it will flow into the first cooling passage 203 connected thereto through another interface.

[0026] As shown in the figure, a plurality of cooling pipes 2 are arranged along the length direction of the concrete body 1, and each cooling pipe 2 is detour multiple times in the horizontal plane, so that most of the surrounding concrete body 1 can be effectively covered when cooling down. When the interior of the concrete body 1 needs to be cooled down, the high-pressure water pump is started, and the coolant in the cooling pool 4 is transported to each cooling pipe 2. Since the first cooling passage 203 and the second cooling passage 204 are provided in the cooling pipe 2, the coolant that first enters the concrete body 1 through the first cooling passage 203 will perform heat exchange with the concrete body 1. After the coolant flows in the first cooling passage 203 for a period of time, it will gradually heat up due to absorbing the heat in the concrete body 1. The heated coolant will flow into the second cooling passage 204 under the action of the reversing shell 5. Since the second cooling passage 204 is located The cooling liquid flows into the second cooling passage 204 and does not exchange heat with the concrete any more, and finally flows out of the concrete body 1 and enters the recovery pool 3. The cooling liquid that initially enters the concrete body 1 through the second cooling passage 204 does not exchange heat with the concrete body 1 first. When the cooling liquid passes through the reversing shell 5 and enters the first cooling passage 203, it can exchange heat with the concrete body 1. In simple terms, the cooling liquid that enters from the first cooling passage 203 flows through the reversing shell 5 and then enters the second cooling passage 204. Conversely, the cooling liquid that enters from the second cooling passage 204 flows through the reversing shell 5 and then enters the first cooling passage 203. This reduces the distance for heat exchange between the cooling liquid and the concrete body 1, ensures that the temperature inside the concrete can be effectively reduced when the cooling liquid flows through, and the cooling effect is significantly improved.

[0027] By arranging a reversing housing 5 at the length center of each cooling pipeline 2, and arranging a first cooling passage 203 and a second cooling passage 204 in the cooling pipeline 2, the positions of the coolants in the first cooling pipeline 2 and the second cooling pipeline 2 are interchanged, and the coolant in the cooling pipeline 2 that has absorbed the heat of the concrete and heated up can be effectively guided to the second cooling passage 204 in time, effectively solving the problem that the coolant cannot cool down the inside of the concrete after heating up, so that the coolant entering the concrete body 1 can always and stably absorb the heat inside the concrete body 1 and cool it down, and, A plurality of cooling pipelines 2 are arranged along the length direction of the concrete body 1, and the two ends of each cooling pipeline 2 are respectively connected to the external cooling pool 4 and the recovery pool 3. The temperature of the coolant entering the concrete body 1 can also be fine-tuned according to the position of each cooling pipeline 2 arranged in the concrete body 1, so that the concrete near the center of the concrete body 1 and with a higher temperature can be effectively cooled. This not only effectively improves the cooling efficiency, but also selects coolants of different temperatures to enter the cooling pipeline 2 according to the different positions of the cooling pipeline 2 in the concrete body 1, which effectively improves the flexibility during cooling.

[0028] In this embodiment, each of the cooling pipelines 2 is disconnected and spaced apart at the center of its length, and both end faces are connected to the reversing shell 5, and each surface of the reversing shell 5 is provided with four interfaces respectively connected to the adjacent first cooling passage 203 and the second cooling passage 204, and corresponding interfaces on the two reversing shells 5 are connected with a hose 7, and the interchange of water flow in the first cooling passage 203 and the second cooling pipeline 2 is realized, wherein a protective shell 6 is further provided at the disconnected interval at the center of the length of the cooling pipeline 2, and the protective shell 6 is cylindrical and coaxially arranged outside the two reversing shells 5, and the protective shell 6 is sleeved outside the cooling pipeline 2 and fixedly connected thereto, and the protective shell 6 is composed of two mirror-arranged semicircular shells fixedly connected by bolts.

[0029] As shown in the figure, by disconnecting the middle part of the cooling pipeline 2, and setting a reversing shell 5 on the end faces of the two adjacent disconnected cooling pipelines 2, and interconnecting them through multiple hoses 7, the problem of reversing the internal water flow of the first cooling passage 203 and the second cooling passage 204 is solved, and the flow rate of the internal water flow is guaranteed. In addition, the external protective shell 6 can effectively protect the hose 7 to prevent the hose 7 from being squeezed after concrete pouring.

[0030] In this embodiment, the cooling pipeline 2 is provided with a plurality of groups along the height direction of the concrete body 1, and any two adjacent cooling pipelines 2 are evenly spaced, the first cooling passages 203 in each group of the cooling pipelines 2 are connected to the cooling pool 4 arranged outside the concrete body 1, and the second cooling passages 204 are connected to the recovery pool 3 arranged outside the concrete body 1, wherein the cooling pool 4 is divided into a plurality of liquid storage chambers, each of the liquid storage chambers is provided with a first refrigeration device for controlling the temperature of the coolant (the first refrigeration device can adopt existing equipment such as semiconductor refrigerators, which is not shown in the figure), each of the liquid storage chambers is connected to the corresponding first cooling passage 203, and according to the different positions of the cooling pipeline 2 in the concrete body 1, it is cooled using coolants of different temperatures.

[0031] When the volume of the concrete body 1 is large, the cooling pipelines 2 arranged in multiple layers can well evenly cool the entire concrete body 1, and a plurality of liquid storage chambers with different temperatures are arranged in the cooling pool 4, which can use coolant of corresponding temperature to cool down the concrete body 1 according to the specific position of each cooling pipeline 2 in the concrete body 1. For example, when one of the cooling pipelines 2 is arranged at the inner center of the concrete body 1, since the temperature inside it is relatively high, the liquid storage chamber connected to this cooling pipeline 2 can adjust the temperature of the coolant inside it under the action of the first refrigeration device, so as to achieve the effect of "treating the disease with the right medicine". Similarly, for the cooling pipelines 2 at other positions in the concrete body 1, the temperature of the coolant in the corresponding liquid storage chamber can also be adjusted, which not only effectively solves the problem of large temperature difference between the cooling pipelines 2, but also further improves the flexibility in cooling the concrete body 1.

[0032] In this embodiment, a plurality of first temperature sensors are fixedly connected to the outer surface of each cooling pipeline 2, and the first temperature sensors are arranged at intervals along the length direction of the cooling pipeline 2 and are used to monitor the temperature of the surrounding concrete in real time. A second temperature sensor for monitoring the temperature of the coolant is provided in each liquid storage chamber, and each of the first temperature sensor, the second temperature sensor, the high-pressure water pump and the first refrigeration equipment is electrically connected to a controller (the controller can be a single-chip microcomputer or a computer).

[0033] The first temperature sensor can detect the temperature of concrete around the location, and based on the detected temperature data, the controller can adjust the temperature of the coolant in each cooling chamber in real time through the first refrigeration equipment, and confirm whether the temperature in each cooling chamber meets the standard through the feedback data of the second sensor, and then transport the coolant in the storage chamber and the cooled coolant to the corresponding cooling pipeline 2 through the high-pressure water pump, and evenly cool the concrete body 1; through the data fed back by the first temperature sensor, the controller can adjust the temperature in each cooling chamber in real time, which can effectively improve the overall uniformity of cooling the concrete body 1 and also improve the degree of automation during cooling.

[0034] In this embodiment, the recovery pool 3 is interconnected with each cooling chamber, and a high-pressure water pump is provided on the connecting road. The recovery pool 3 is provided with a second refrigeration device for initially cooling the recovered coolant. The recovery pool 3 is provided with a third temperature sensor for monitoring the temperature. The third temperature sensor and the second refrigeration device are electrically connected to the controller (wherein, the individual temperature sensors and the second refrigeration device are not shown in the figure).

[0035] After the coolant is adjusted to a suitable temperature in the cooling chamber, it enters the corresponding cooling pipeline 2 through a high-pressure water pump and performs heat exchange with the interior of the concrete body 1. After the temperature exchange, the coolant will gradually heat up. When the heated coolant flows into the recovery pool 3, the second refrigeration equipment will initially cool down all the collected coolants that have been heated to prevent the coolant from directly flowing into the liquid storage chamber after heat exchange and destroying the stability of its internal temperature. The temperature in the recovery pool 3 can be effectively monitored by the third temperature sensor. When the temperature drops to a suitable temperature, the coolant in the recovery pool 3 will flow into each cooling chamber, effectively reducing the temperature fluctuation in each cooling chamber and ensuring the stability and accuracy of the subsequent cooling of the interior of the concrete body 1.

[0036] In this embodiment, the upper surface of the concrete body 1 is provided with a plurality of watering pipes 8 arranged along its length direction, each of the watering pipes 8 is connected to the corresponding liquid storage chamber, and a high-pressure water pump is provided on the connecting path. Any two adjacent watering pipes 8 are arranged at intervals, and the sprayed coolant covers the entire upper surface of the concrete body 1.

[0037] By connecting the sprinkler pipe 8 to one of the liquid storage chambers, the coolant can be sprinkled on the upper surface of the concrete body 1 to cool it down, thereby effectively reducing the problem of excessive temperature difference between the outer surface and the interior of the concrete body 1.

[0038] In this embodiment, each of the second pipes 202 is made of a material with low thermal conductivity (such as plastic), which can prevent heat exchange between the first cooling passage 203 and the second cooling passage 204. Each of the first pipes 201 is made of a material with high thermal conductivity (such as copper or aluminum), which can accelerate the coolant to absorb heat in the concrete body 1.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A mass concrete cooling system, comprising a concrete body (1) and a cooling pipeline (2) arranged inside the concrete body, characterized in that: The cooling pipeline (2) comprises a plurality of first pipes (201) arranged at intervals along the length direction of the concrete body (1) and a second pipe (202) coaxially arranged inside the first pipe (201), wherein each of the first pipes (201) makes multiple detours in a horizontal plane, the diameter of the first pipe (201) is larger than that of the second pipe (202), and the inner wall of the first pipe (201) and the outer surface of the second pipe (202) together form an annular first cooling passage (203), the second pipe (202) is hollow inside and is provided with a second cooling passage (204), and the two ends of each first cooling passage (203) are respectively connected to a cooling pool (4) and a recovery pool (3) located outside the concrete body (1), and each second The two ends of the cooling passage (204) are also connected to the cooling pool (4) and the recovery pool (3). A reversing shell (5) for changing the flow direction of the water flow inside the cooling pipeline (2) is provided at the center of the length. The surface of the reversing shell (5) is provided with four interfaces that correspond to each other and are connected to each other. The four interfaces are respectively connected to two adjacent first cooling passages (203) and two second cooling passages (204). When the liquid in the first cooling passage (203) flows through the reversing shell (5) through the interface connected to it, it will flow into the second cooling passage (204) through another interface connected to it, thereby realizing the conversion of the water flow inside the cooling pipeline (2) from the first cooling passage (203) to the second cooling passage (204).

2. A mass concrete cooling system according to claim 1, characterized in that: Each of the cooling pipelines (2) is disconnected at the center of its length and arranged at intervals, and both end surfaces are connected to the reversing housing (5). The surface of each of the reversing housings (5) is provided with four interfaces respectively connected to the adjacent first cooling passage (203) and the second cooling passage (204), and a hose (7) is connected between the corresponding interfaces on the two reversing housings (5). A protective housing (6) is provided at the disconnected interval at the center of the length of the cooling pipeline (2), and the protective housing (6) is cylindrical and coaxially fixed outside the two reversing housings (5).

3. A mass concrete cooling system according to claim 2, characterized in that: The cooling pipelines (2) are provided in a plurality of groups at intervals along the height direction of the concrete body (1); the first cooling passages (203) in each group of the cooling pipelines (2) are connected to a cooling pool (4) arranged outside the concrete body (1); and the second cooling passages (204) are connected to a recovery pool (3) arranged outside the concrete body (1); wherein the cooling pool (4) is divided into a plurality of liquid storage chambers, each of which is provided with a first refrigeration device for controlling the temperature of the cooling liquid; each of the liquid storage chambers is connected to a corresponding first cooling passage (203), and according to different positions of the cooling pipelines (2) in the concrete body (1), cooling liquids of different temperatures are used to cool the cooling pipelines (2).

4. A mass concrete cooling system according to claim 3, characterized in that: A plurality of first temperature sensors are fixedly connected to the outer surface of each cooling pipeline (2), and the first temperature sensors are arranged at intervals along the length direction of the cooling pipeline (2). A second temperature sensor for monitoring the temperature of the coolant is arranged in each liquid storage chamber, and each of the first temperature sensor, the second temperature sensor, the high-pressure water pump and the first refrigeration device is electrically connected to a controller.

5. A mass concrete cooling system according to claim 4, characterized in that: The recovery pool (3) is interconnected with each cooling chamber, a second refrigeration device is provided in the recovery pool (3), and a third temperature sensor is provided in the recovery pool (3), and the third temperature sensor and the second refrigeration device are both electrically connected to the controller.

6. A mass concrete cooling system according to claim 5, characterized in that: The upper surface of the concrete body (1) is provided with a plurality of watering pipes (8) arranged along its length direction, each of the watering pipes (8) is connected to a corresponding liquid storage chamber, and the sprayed cooling liquid covers the entire upper surface of the concrete body (1).

7. A mass concrete cooling system according to claim 6, characterized in that: Each of the first pipes (201) is made of a material with a high thermal conductivity, and each of the second pipes (202) is made of a material with a low thermal conductivity.

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