Temperature control structure of mass concrete

Abstract

The utility model relates to a temperature control structure of mass concrete. The temperature control structure comprises a cold water plate, a cooling rod and a butt joint device, the cold water plates are arranged in four areas formed by dividing the concrete plane according to diagonals in a left-right and up-down anti-symmetric mode, and grids are arranged in the cold water plates. The cold water plates in each area are arranged in a spiral shape and connected through the butt joint devices at the corners. And cooling rods are arranged at the diagonal intersection and the midpoint from each vertex of the concrete plane to the diagonal intersection. The spiral cold water plate has the advantages that the cold water plates are arranged in the four areas formed by dividing the concrete plane according to the diagonals in a left-right and up-down anti-symmetric mode, the temperature control effect is improved, and the applicable area of the spiral cold water plates is enlarged by four times.

Description

Technical Field

[0001] The utility model relates to the field of concrete temperature control, and more specifically, to a temperature control structure for mass concrete. Background Art

[0002] Cold water pipes are one of the main measures for temperature control of large-volume concrete, and their effectiveness has been verified in practice. In order to ensure that the cold water pipes in the concrete are not crushed, cold water pipes are mostly hard pipes made of steel or plastic. In addition, for the convenience of transportation, cold water pipes are usually cut into 5-10m sections and assembled on site, which not only increases assembly time and material loss, but also too many nodes will increase costs and the risk of leakage. Therefore, soft, curlable, and freely divisible cold water carriers are worth studying.

[0003] At present, there are two ways to arrange cold water pipes in plane, namely bow-shaped arrangement and spiral arrangement. From the perspective of the distribution of hydration heat of large-volume concrete, the spiral arrangement is more effective, but its application is limited by the specification in the "Massive Concrete Construction Standard" (GB50496-2018) that the length of a single cold water pipe should be controlled within 200m. The spiral has a larger circumference as it goes to the periphery, and it is easy to be overlong, resulting in a limited area of ​​large-volume concrete blocks where it is applicable. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a temperature control structure for mass concrete. The technical solution is as follows: the temperature control structure is installed on the concrete and includes: a cold water plate, a cooling rod and a docking device;

[0005] The four areas formed by the diagonal division of the concrete plane are respectively provided with the cold water plates in a left-right and up-down anti-symmetrical arrangement, and the cold water plates have grilles inside; the cold water plates in each area are arranged in a spiral shape and are connected at the bends by the docking device; cooling rods are provided at the intersection of the diagonals and at the midpoints from each vertex of the concrete plane to the intersection of the diagonals.

[0006] Preferably, the cold water plate is provided with a water inlet at one end close to the intersection of the diagonals, and a water outlet at the other end; the water inlet and water outlet of each cold water plate are in different directions.

[0007] Preferably, the temperature control structure further comprises a temperature measuring cable; the temperature measuring cable is located on the symmetry axis between the cold water plates spaced apart from each other.

[0008] Preferably, a joint is installed on the side of the cold water plate by hot melting, and a circular hole is reserved in the middle of the joint, and the interval between the holes is 0.5 to 1 m.

[0009] Preferably, an extension rod is installed on the joint by means of a hexagonal screw and a nut; a buckle and a lifting ring are provided on the extension rod, and a clip and a spring are provided at the end of the buckle.

[0010] Preferably, the size of the docking connector is larger than the cold water plate, the docking area of ​​the docking connector is hollow, and a circular rubber is provided at the bottom of the docking area, the inner size of which is smaller than the outer size of the cold water plate, and there is an ear plate at the end of the docking area, and there is a circular hole at the end of the ear plate; there is an L-shaped grille inside the non-docking area of ​​the docking connector.

[0011] Preferably, the top of the cooling rod is provided with heat dissipation fins, and the bottom of the cooling rod is filled with low-boiling point material, and the low-boiling point material contacts the heat source and evaporates to the top of the cooling rod to dissipate heat and then cools and refluxes.

[0012] Preferably, the low boiling point material is liquid nitrogen or Freon.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model arranges the cold water plates in a left-right and up-down anti-symmetrical manner on the concrete plane according to the four areas formed by diagonal division, and the whole presents a spiral shape. This arrangement not only satisfies that the water inlet of the cold water plate is set in the center of the concrete, the direction of the cooling water is just opposite to the development of the hydration heat temperature field, and the temperature control effect is improved by superposition of the two, but also meets the requirements for the length of a single cold water plate, and the applicable area of ​​the spiral cold water plate is expanded by four times.

[0015] 2. The utility model organically combines the heat dissipation of the cold water plate and the cooling rod, giving full play to the efficient heat dissipation function of the cooling rod, avoiding the high cost of using a single cooling rod and leaving too many holes that affect the structural safety; giving full play to the characteristics of the cold water plate of low cost and easy construction, avoiding the local excessive temperature caused by the low heat transfer efficiency of the cold water plate.

[0016] 3. The cold water board provided by the utility model is relatively thin, made of plastic, and has a grille inside, which not only ensures the stability of the internal space of the cold water board, but also can be rolled up during transportation, and can be cut arbitrarily according to the length arranged on site, making transportation and use more convenient. At the same time, an interface is set on the side of the cold water board for fixing the ear plate and the extension rod, which has an ingenious structure and is convenient for subsequent construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of a temperature control structure of a large volume concrete;

[0018] Figure 2 A side view of a temperature control structure of a large volume concrete;

[0019] Figure 3 is a structural schematic diagram of the docking device;

[0020] Figure 4 It is a schematic diagram of the connection between the docking device, the cold water plate, the extension rod, the bracket, and the temperature measuring cable;

[0021] Figure 5 It is a schematic diagram of the connection between the end of the cold water plate and the return rubber;

[0022] Figure 6 for Figure 4 A magnified schematic diagram of the middle A area;

[0023] Figure 7 for Figure 4 A magnified schematic diagram of the middle B area;

[0024] Figure 8 for Figure 4 A side view of the enlarged schematic diagram of the middle A area;

[0025] Fig. 9 for Figure 4 Side view of the enlarged schematic diagram of region B;

[0026] Explanation of the reference numerals: 1 cold water plate; 101 water inlet; 102 water outlet; 103 grille; 2 cooling rod; 201 coolant; 202 cooling fin; 203 seamless steel pipe; 3 concrete; 4 docking connector; 401 ear plate; 402 circular rubber; 403 L-type grille; 5 temperature measuring cable; 6 bracket; 7 extension rod; 8 joint; 9 hexagonal screw; 10 nut; 11 lifting eye; 12 buckle; 1201 clip; 1202 spring. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0028] Embodiment 1:

[0029] In order to expand the applicable area of ​​large-volume concrete blocks, such as Figure 1 As shown, Example 1 of the present application provides a temperature control structure for a large volume of concrete, the temperature control structure is installed on the concrete 3, and includes: a cold water plate 1, a cooling rod 2 and a docking device 4;

[0030] The four areas formed by the diagonal division of the concrete plane 3 are respectively provided with cold water plates 1 in a left-right and up-down anti-symmetrical manner, with a total of four cold water plates 1. In addition, another layer of cold water plates 1 can be arranged about 1 meter below according to the plane layout plan, forming two rows of cold water plates 1 on the facade.

[0031] There is a grid 103 inside the cold water plate 1; the cold water plates 1 in each area are arranged in a spiral shape and connected by a docking device 4 at the bend; cooling rods 2 are arranged at the intersection of the diagonals and at the midpoints from each vertex of the concrete 3 plane to the intersection of the diagonals, and there are 5 cooling rods in total.

[0032] It can be seen that the present application effectively improves the uniformity of temperature control inside the concrete, reduces the generation of temperature cracks, and improves the construction quality and durability of large-volume concrete through the anti-symmetrical arrangement of cold water plates and spiral shape arrangement. At the same time, the cooling rods added at the intersection of diagonal lines and key positions further enhance the heat dissipation effect of local areas, ensuring the stability and reliability of the overall temperature control effect.

[0033] The cold water plate 1 is provided with a water inlet 101 at one end near the intersection of the diagonal lines, and a water outlet 102 at the other end; the directions of the water inlet 101 and the water outlet 102 of each cold water plate 1 are different. Each cold water plate 101 is independently provided with water inlets and outlets in different directions, which realizes the flexible control of the water flow direction and enhances the targeted cooling effect. This design is conducive to optimizing the water flow path and improving the cooling efficiency, while avoiding the problems of local overheating or uneven cooling caused by a single water flow direction.

[0034] The temperature control structure also includes a temperature measuring cable 5; the temperature measuring cable 5 is located on the symmetric axis of the cold water plates 1. The temperature measuring cable 5 is arranged on the symmetric axis of the cold water plates, which can monitor the temperature change inside the concrete in real time and provide accurate data support for the adjustment of the temperature control strategy. This helps to timely discover and solve potential temperature anomalies, and further improves the quality control and safety performance of concrete construction.

[0035] The main body of the cold water plate 1 is formed by plastic extrusion. A joint 8 is installed on the side of the cold water plate 1 by hot melting. A circular hole is reserved in the middle of the joint 8, and the interval between the holes is 0.5 to 1 m.

[0036] The extension rod 7 is installed on the joint 8 by means of a hexagonal screw 9 and a nut 10 ; a buckle 12 and a lifting ring 11 are provided on the extension rod 7 , and a clip 1201 and a spring 1202 are provided at the end of the buckle 12 .

[0037] The size of the docking connector 4 is slightly larger than the cold water plate 1. The docking area of ​​the docking connector 4 is hollow, and a circular rubber 402 is provided at the bottom of the docking area. The inner size of the docking area is smaller than the outer size of the cold water plate 1. There is an ear plate 401 at the end of the docking area, and there is a circular hole at the end of the ear plate 401; there is an L-shaped grille 403 inside the non-docking area of ​​the docking connector 4.

[0038] The top of the cooling rod 2 is provided with a heat dissipation fin 202 to enhance the heat dissipation effect. The bottom of the cooling rod 2 is filled with a low boiling point material, which contacts the heat source and evaporates to the top of the cooling rod 2 to dissipate heat and then cools and refluxes. The low boiling point material can be liquid nitrogen or Freon.

[0039] Embodiment 2:

[0040] Based on Example 1, Example 2 of the present application provides a method for installing a temperature control structure of a large volume concrete, comprising:

[0041] Step 1: Install the bracket 6 in the concrete 3 block according to the layout of the cold water plate 1. The bracket has a certain strength, and the structure has a certain ability to resist lateral displacement to prevent the poured concrete from collapsing the bracket.

[0042] Step 2, first cut the curled cold water plate 1 into sections of different lengths, and fix and straighten them for subsequent installation. When cutting, first cut the end of the cold water plate 1 connected to the docking device 4, and strictly control the cutting accuracy. The end of the cold water plate 1 is 51mm away from the center of the circular hole of the connector 8, and the end of the hollow area of ​​the docking device 4 is 50mm away from the center of the circular hole of the ear plate 401. Then install the extension rod 7 on the connector 8 on its side with the hexagonal screw 9 nut 10, and finally install the cold water plate 1 on the bracket 6, and lock it with the bracket 6 through the movable buckle 12 on the extension rod 7.

[0043] Step 3: Install the docking device 4 at the place where the cold water plate 1 needs to turn, insert the end of the cold water plate 1 into the docking device 4 until it contacts the return rubber 402 (with a gap), and then use force to make the cold water plate 1 continue to move forward 1mm, fully contacting the return rubber 402 (without a gap). At this time, the center of the round hole of the ear plate 401 and the joint 8 overlap, and the hexagonal screw 9 nut 10 is fixed to prevent the return rubber 402 from rebounding, thereby achieving pressure sealing and water stopping. To prevent blockage and water leakage, a water flow test is performed before pouring concrete.

[0044] Step 4: Pass the temperature measuring cable 5 through the rings 11 on the extension rod 7 in sequence, and fix its interface to the top of the concrete 3 block.

[0045] Step five, apply friction reducer around the cooling rod 2, and then fix it to the intersection of the cross lines of the concrete 3 blocks and the center of each. The purpose of this arrangement is that the surface area on both sides of the cold water plate 1 is small, the heat that can be absorbed is limited, and the radiation range of its cooling is limited. According to the above arrangement scheme, a square cooling blind spot will appear in the center of the concrete block, and it happens that the temperature here is higher. At the same time, the cross-sectional area of ​​the cold water plate is small, and as the length increases, it is easy to have local overtemperature. It is necessary to increase the internal water flow rate or reduce the water temperature to quickly take away the heat and prevent it from affecting the heat dissipation. However, considering the construction cost, the water flow rate and water temperature have certain limits. Therefore, it is necessary to arrange the cooling rod 2 to make up for the defects of the cold water plate 1, which realizes heat transfer through the internal coolant 201 heat absorption convection, and then dissipates heat.

[0046] Step six, connect the water inlet 101 and the water outlet 102 of the cold water plate 1, extend the water inlet 101 to the top of the concrete block 3, and the water outlet 102 passes through the side of the concrete block 3.

[0047] Step seven, after pouring the concrete 3, start to pass water to the cold water plate 1, control the water temperature and flow rate through the hydration heat of the concrete 3 fed back by the temperature measuring cable 5, and stop passing water when the temperature difference between the inside and outside is consistent.

[0048] Step eight, inject the prepared cement slurry into the pores of the cold water plate 1 and the holes left by the removal of the cooling rod 2 by vacuum grouting. Stop grouting after the slurry overflows for 1 to 2 minutes to ensure that the grouting is densely filled.

[0049] Embodiment 3:

[0050] like Figures 1 to 9 As shown, the cold water plate 1 has a size of 100×10mm, and the grid 103 spacing is 5-6mm; the horizontal spacing between the cold water plates 1 is 50-60cm, the vertical spacing is 100-120cm, and the buried distance from the surface and side of the concrete 3 is not less than 50cm. Since the surface area of ​​the cold water plate 1 is large and the cross-sectional area is small, the water flow velocity inside it is 1.6m 3 / h~2.0m 3 / h, the water inlet temperature is 10℃~15℃, which is slightly faster and the water temperature is slightly lower than that in conventional cold water pipes. The coolant 201 in the cooling rod 2 is a low-boiling point material such as liquid nitrogen and Freon. It evaporates through the bottom contact heat source to the top for heat dissipation and then cools and refluxes, and the purpose of cooling is achieved through a cycle. Its diameter is about 10~15cm and the depth is 3~5m. The size of the concrete 3 block is 50m×50m×2m, and the temperature of the concrete 3 entering the mold is 25℃.

Claims

1. A temperature control structure for mass concrete, characterized in that: The temperature control structure is installed on the concrete (3), and comprises: a cold water plate (1), a cooling rod (2) and a docking device (4); The four regions formed by the diagonal division of the concrete (3) plane are provided with the cold water plates (1) in a left-right and up-down anti-symmetrical manner, and the cold water plates (1) have a grid (103) inside; the cold water plates (1) in each region are arranged in a spiral shape and are connected at the bends by the docking device (4); cooling rods (2) are provided at the intersection of the diagonals and at the midpoints from each vertex of the concrete (3) plane to the intersection of the diagonals.

2. The temperature control structure of mass concrete according to claim 1, characterized in that: The cold water plate (1) is provided with a water inlet (101) at one end close to the intersection of the diagonals, and a water outlet (102) at the other end; the directions of the water inlet (101) and the water outlet (102) of each cold water plate (1) are different.

3. The temperature control structure of mass concrete according to claim 2, characterized in that: The temperature control structure also includes a temperature measuring cable (5); the temperature measuring cable (5) is located on symmetric axes of the cold water plates (1) that are spaced apart from each other.

4. The temperature control structure of mass concrete according to claim 3, characterized in that: A joint (8) is installed on the side of the cold water plate (1) by hot melting, and a circular hole is reserved in the middle of the joint (8), and the interval between the holes is 0.5 to 1 m.

5. The temperature control structure of mass concrete according to claim 4, characterized in that: An extension rod (7) is installed on the joint (8) via a hexagonal screw (9) and a nut (10); a buckle (12) and a lifting ring (11) are provided on the extension rod (7); and a clip (1201) and a spring (1202) are provided at the end of the buckle (12).

6. The temperature control structure of mass concrete according to claim 5, characterized in that: The size of the docking connector (4) is larger than that of the cold water plate (1); the docking area of ​​the docking connector (4) is hollow, and a return-shaped rubber (402) is provided at the bottom of the docking area, the inner size of which is smaller than the outer size of the cold water plate (1); an ear plate (401) is provided at the end of the docking area, and a circular hole is provided at the end of the ear plate (401); and an L-shaped grille (403) is provided inside the non-docking area of ​​the docking connector (4).

7. The temperature control structure of mass concrete according to claim 6, characterized in that: The top of the cooling rod (2) is provided with a heat dissipation fin (202), and the bottom of the cooling rod (2) is filled with a low-boiling-point material. The low-boiling-point material contacts a heat source and evaporates to the top of the cooling rod (2) to dissipate heat and then cools and refluxes.

8. The temperature control structure of mass concrete according to claim 7, characterized in that: The low boiling point material is liquid nitrogen or Freon.

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