Concrete-filled steel tube column with high inner wall bonding quality and construction method of concrete-filled steel tube column

Abstract

The invention discloses a concrete-filled steel tubular column with high inner wall bonding quality and a construction method thereof, and belongs to the technical field of building construction.The concrete-filled steel tubular column comprises a steel tubular column body, a cooling unit used for cooling concrete is arranged in the steel tubular column body, and the peripheral face of the steel tubular column body is coated with a heating unit; the cooling unit and the heating unit are used for adjusting the pre-temperature difference of the steel pipe column for pouring concrete so as to achieve pre-deformation, through the combination of the two modes, structural damage caused by too high temperature of the concrete in the steel pipe column is reduced, pre-deformation is achieved through the pre-temperature difference, namely steel pipe column pre-expansion and concrete pre-shrinkage, and the pre-deformation effect is improved. After temperature control is canceled in the later period, the steel pipe column shrinks and concrete expands under the influence of temperature, the steel pipe column and the concrete are attached more tightly, and the later rigidity of the steel pipe column concrete can be kept easily.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a steel tube concrete column with high inner wall bonding quality and a construction method thereof. Background Art

[0002] Steel tube concrete is to pour concrete into steel tubes and tamp them to increase the strength and rigidity of the steel tubes. It has the characteristics of high bearing capacity, good ductility and excellent seismic performance, which can greatly shorten the construction period. It is suitable for the current construction field and meets the construction standards of fast progress and high efficiency.

[0003] When pouring steel tube concrete, the concrete structure cross-section inside the steel tube column is large, the concrete strength grade is high, the cement hydration heat is large and difficult to release, and the temperature is too high to easily cause the internal concrete structure to be damaged. In addition, the temperature inside the concrete structure is higher than that of the steel tube. During use, the temperature drop of the concrete inside the tube is greater than that of the steel tube, which leads to a tendency for the concrete and the steel tube wall to easily separate. During use, various live loads will cause stress changes in the steel tube column. As time goes by, a certain degree of separation may occur, affecting the stiffness of the steel tube column and the redistribution of internal forces, which may affect the use function of the structure. Therefore, it is necessary to provide a steel tube concrete column and a construction method that can cool the concrete inside the steel tube column, so that the steel tube concrete can generate a reverse temperature difference in advance and maintain this reverse temperature difference for a period of time after the concrete solidifies, until the solidified concrete can bear the stress caused by this temperature difference. Summary of the invention

[0004] The object of the present invention is to provide a steel tube concrete column with high inner wall bonding quality and a construction method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A steel tube concrete column with high inner wall bonding quality comprises a steel tube column, wherein a cooling unit for cooling concrete is arranged in the steel tube column, and a heating unit is coated on the outer periphery of the steel tube column, and the cooling unit and the heating unit are used to adjust the pre-temperature difference of the steel tube column for pouring concrete to achieve pre-deformation; the cooling unit comprises a plurality of cooling water pipes, wherein the cooling water pipes are vertically arranged in the steel tube column, wherein one of the cooling water pipes is located in the middle of the steel tube column, and the other cooling water pipes are arranged circumferentially, and the bottom end of the cooling water pipe located in the middle is a water inlet end, and the plurality of cooling water pipes are connected in sequence through a plurality of connecting pipes, and the cooling water pipes are connected to the connecting pipes through a two-way elbow, and two steel reinforcements are arranged on the plurality of cooling water pipes, and a plurality of temperature sensors are arranged in sequence from top to bottom on the inner wall and the outer wall of the steel tube column and the plurality of cooling water pipes.

[0007] Preferably, the steel reinforcement member includes a plurality of fixing seats, the plurality of fixing seats are respectively connected to the cooling water pipe, fixed steel bars and oblique steel bars are arranged between two adjacent fixing seats, and one side of the fixing seats is connected to the inner wall of the steel pipe column through an extension portion.

[0008] Preferably, the plurality of temperature sensors are divided into three groups from top to bottom, the interval between two adjacent groups of temperature sensors is 1000 mm, and the number of the temperature sensors in each group is thirteen.

[0009] Preferably, the cooling water pipe is provided with a plurality of heat-conducting sleeves in sequence from top to bottom, a plurality of cooling fins are provided on the outer peripheral surface of the heat-conducting sleeve, and a plurality of through holes are opened on the cooling fins.

[0010] Preferably, the heating unit includes a heating belt, which is spirally wound around the outer circumference of the steel pipe column. The heating belt is connected to the steel pipe column via an aluminum tape. A water supply pipe is provided between the heating belt and the steel pipe column. The water in the water supply pipe is heated by the heating belt to heat the outer side of the steel pipe column. The outer circumference of the aluminum tape is covered with an insulation cover.

[0011] Preferably, a circulation unit is further included, which includes a box body, a water outlet pipe and a water inlet pipe are arranged on one side of the box body, one end of the water outlet pipe is connected to the bottom end of the cooling water pipe located in the middle, the other end of the water outlet pipe extends to the interior of the box body and is provided with a heat conduction bent pipe, the water inlet end of the heat conduction bent pipe is connected to the water inlet pipe, and a plurality of heat dissipation fins are arranged on the heat conduction bent pipe in sequence from top to bottom, and the plurality of heat dissipation fins are connected to the inner wall of the box body through a fixing plate.

[0012] Preferably, multiple ventilation holes are provided on the opposite sides of the box body, two connecting plates are provided on the inner wall of the box body, multiple sealing rings are provided on the side of the connecting plate opposite to the ventilation holes, multiple blocking plates corresponding to the ventilation holes are provided on the connecting plates, two double-threaded screw rods are threadedly connected on the two connecting plates, and a synchronous wheel is provided on each of the two double-threaded screw rods, and the two synchronous wheels are connected with a synchronous belt.

[0013] Preferably, one side of the box body is rotatably connected to multiple drive shafts, one end of the drive shaft extends to the interior of the box body and is provided with fan blades, one side of the box body is provided with a motor, the output shaft of the motor and the ends of the multiple drive shafts are provided with synchronous wheels 2, multiple synchronous wheels 2 are sleeved with synchronous belts 2, and a cooling module is provided at the bottom of the inner wall of the box body.

[0014] Preferably, the water outlet of the cooling unit is connected to the water inlet of the heating unit, and the water outlet of the heating unit is connected to the water inlet pipe.

[0015] A construction method for a steel tube concrete column with high inner wall bonding quality, the specific steps comprising:

[0016] The steel pipe column is hoisted to the designated position, and then the cooling unit is installed in the steel pipe column by welding. After the cooling unit is installed, a water pressure test is performed;

[0017] Mark the test section on the steel pipe column, then mark the marking points on the test section, install the heating unit from top to bottom according to the marking points, connect the heating unit to the power junction box, and then inspect and test the heating unit;

[0018] Concrete is poured into the steel pipe column, and the outer peripheral side of the steel pipe column is heated by a heating unit. The constant temperature of the heating unit is T0+30℃, where T0 is the transient air temperature (i.e., the ambient transient temperature). The steel pipe column is preheated, and the heat near the cooling unit is taken away by circulating low-temperature liquid inside the cooling unit to cool the concrete, thereby reducing the peak temperature of the concrete inside the steel pipe column.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The concrete inside the steel pipe column is cooled by the cooling unit, and the outside of the steel pipe column is heated at a constant temperature by the heating unit. The above two methods are combined to reduce the structural damage caused by excessive temperature of the concrete inside the steel pipe column. Pre-deformation is achieved through pre-temperature difference, that is, pre-expansion of the steel pipe column and pre-contraction of the concrete. After the temperature control is cancelled in the later stage, the steel pipe column shrinks and the concrete expands under the influence of temperature, so that the two fit more closely, which is conducive to maintaining the stiffness of the concrete of the steel pipe column in the later stage.

[0021] The invention has a simple application process, and through internal cooling and external heating, the pre-reflection temperature difference is easier to achieve, thereby reducing energy loss. Moreover, part of the cooling unit structure and the heating unit can be recycled and reused, thereby effectively reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural cross-sectional view of the steel pipe column of the present invention;

[0024] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0025] Figure 4 It is a structural schematic diagram of a cooling unit of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the heat-conducting sleeve of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the circulation unit of the present invention;

[0028] Figure 7 This is a disassembled diagram of the internal structure of the box of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the heat conduction elbow of the present invention.

[0030] In the figure:

[0031] 100, steel pipe column; 200, cooling unit; 201, cooling water pipe; 202, connecting pipe; 203, fixing seat; 204, fixing steel bar; 205, extension; 206, oblique steel bar; 207, temperature sensor; 208, heat transfer sleeve; 209, cooling fin; 210, through hole; 300, heating unit; 301, water supply pipe; 302, aluminum tape; 303, heating belt; 304, insulation cover; 400, circulation unit; 40 1. Box body; 402. Water outlet pipe; 403. Water inlet pipe; 404. Heat conduction bent pipe; 405. Heat dissipation fins; 406. Fixing plate; 407. Ventilation hole; 408. Blocking plate; 409. Connecting plate; 410. Sealing ring; 411. Double-threaded screw; 412. Synchronous wheel one; 413. Synchronous belt one; 414. Driving shaft; 415. Motor; 416. Synchronous wheel two; 417. Synchronous belt two; 418. Fan blades; 419. Cooling module. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-Figure 8 , the present invention provides a technical solution:

[0034] like Figure 1As shown, a steel tube concrete column with high inner wall bonding quality includes a steel tube column 100, a cooling unit 200 for cooling concrete is arranged in the steel tube column 100, and a heating unit 300 is coated on the outer periphery of the steel tube column 100. The cooling unit 200 and the heating unit 300 are used to adjust the pre-temperature difference of the steel tube column 100 for pouring concrete to achieve pre-deformation. By combining the above two methods, the structural damage caused by excessive temperature of the concrete inside the steel tube column 100 is reduced. The pre-deformation is achieved through the pre-temperature difference, that is, the pre-expansion of the steel tube column 100 and the pre-contraction of the concrete. After the temperature control is cancelled in the later stage, the steel tube column 100 shrinks and the concrete expands under the influence of temperature, so that the two fit more closely, which is beneficial to maintaining the later stiffness of the concrete of the steel tube column 100.

[0035] like Figure 2 As shown, the cooling unit 200 includes a plurality of cooling water pipes 201, and the cooling water pipes 201 are vertically arranged in the steel pipe column 100, one of the cooling water pipes 201 is located in the middle of the steel pipe column 100, and the other cooling water pipes 201 are arranged circumferentially, and the bottom end of the cooling water pipe 201 located in the middle is the water inlet end, and the plurality of cooling water pipes 201 are connected in sequence through a plurality of connecting pipes 202, and the cooling water pipes 201 are connected to the connecting pipes 202 through a two-way elbow, and two steel reinforcements are arranged on the plurality of cooling water pipes 201, and a plurality of temperature sensors 207 are arranged in sequence from top to bottom on the inner wall and the outer wall of the steel pipe column 100 and the plurality of cooling water pipes 201.

[0036] Furthermore, multiple temperature sensors 207 are divided into three groups from top to bottom, with an interval of 1000 mm between two adjacent groups of temperature sensors 207. The number of temperature sensors 207 in each group is thirteen. It should be noted that another group of temperature sensors is required to monitor the ambient temperature, with one sensor arranged at different heights around, for a total of two. Before installation, it is necessary to test whether the temperature sensor 207 is in normal use, and pay attention to protection during installation.

[0037] Further, such as Figure 4 As shown, the steel reinforcement includes a plurality of fixing seats 203, and the plurality of fixing seats 203 are respectively connected to the cooling water pipe 201, and a fixing steel bar 204 and an oblique steel bar 206 are arranged between two adjacent fixing seats 203, and one side of the fixing seat 203 is connected to the inner wall of the steel pipe column 100 through an extension portion 205.

[0038] In this embodiment, the number of cooling water pipes 201 is five and the height is 3000 mm. One cooling water pipe 201 is located in the middle of the steel pipe column 100, and the remaining four cooling water pipes 201 are arranged circumferentially. The remaining four cooling water pipes 201 are spaced 460 mm from the middle cooling water pipe 201, and the upper and lower interfaces of the five cooling water pipes 201 are connected in pairs to form a loop.

[0039] like Figure 5 As shown, the cooling water pipe 201 is sequentially provided with a plurality of heat-conducting sleeves 208 from top to bottom, a plurality of cooling fins 209 are provided on the outer peripheral surface of the heat-conducting sleeve 208, and a plurality of through holes 210 are opened on the cooling fins 209. By providing the heat-conducting sleeve 208 and the cooling fins 209, when the cooling unit 200 cools the concrete, the cooling range of the concrete can be improved, and the cooling effect of the concrete can also be improved.

[0040] like Figure 3 As shown, the heating unit 300 includes a heating belt 303, which is spirally wound around the outer circumference of the steel pipe column 100. The heating belt 303 is connected to the steel pipe column 100 through an aluminum tape 302. A water supply pipe 301 is provided between the heating belt 303 and the steel pipe column 100. The moisture in the water supply pipe 301 is heated by the heating belt 303 to achieve heating of the outside of the steel pipe column 100. The outside of the aluminum tape 302 is covered with a heat preservation cover 304.

[0041] When installing the heating unit 300, first confirm whether the axis of the steel pipe column 100 is consistent with the axis required by the test, and mark it. Mark the test section on the steel pipe column 100 with a whiteboard pen, and then mark it every 20cm on the test section. Mark 8 points on each circumference with a point spacing of 45°. When installing the heating belt 303, first connect the heating belt 303 to the water supply pipe 301, and then reserve a length of 50cm-100cm at the head end of the heating belt 303, and then follow the mark. The steel pipe column 100 is spirally wrapped from top to bottom, and at the same time, the aluminum tape 302 is arranged along the heating belt 303, the heating belt 303 and the water supply pipe 301 are adhered to the surface of the steel pipe column 100, and then the insulation cover 304 is laid on the outside of the aluminum tape 302. In the process of arranging the heating belt 303, 2.5m are reserved at the power supply point and the tail end of the heating belt 303 for power access. Furthermore, the resistance wire in the heating belt 303 is wrapped with 50mm thick flame-retardant rubber-plastic insulation cotton for insulation.

[0042] In this embodiment, in order to further improve the utilization rate of energy, the water outlet end of the cooling unit 200 is connected to the water inlet end of the water supply pipe 301 in the heating unit 300, so that the heat generated by the concrete during the solidification process can be recycled, that is, the liquid temperature in the cooling unit 200 is increased by utilizing the heat generated by the concrete during the solidification process, and then the temperature-raised liquid enters the heating unit 300 to heat the outside of the steel pipe column 100, thereby further reducing the energy loss when the heating belt 303 is used.

[0043] like Figure 6and Figure 8 As shown, it also includes a circulation unit 400, which includes a box body 401. A water outlet pipe 402 and a water inlet pipe 403 are arranged on one side of the box body 401. One end of the water outlet pipe 402 is connected to the bottom end of the cooling water pipe 201 located in the middle. The other end of the water outlet pipe 402 extends to the interior of the box body 401 and is provided with a heat conduction elbow 404. The water inlet end of the heat conduction elbow 404 is connected to the water inlet pipe 403. The water inlet end of the water inlet pipe 403 is connected to the water outlet end of the heating unit 300. The heat conduction elbow 404 is sequentially provided with a plurality of heat dissipation fins 405 from top to bottom. 05 is connected to the inner wall of the box body 401 through the fixing plate 406. When the liquid in the cooling unit 200 is circulated, the cooled liquid in the box body 401 is sent to the cooling unit 200 through the outlet pipe 402 by the pump body. The liquid in the cooling unit 200 cools down the heat generated by the concrete during the solidification process. In this process, the liquid is heated, and the heated liquid enters the heating unit 300 to heat the outside of the steel pipe column 100. By setting the heat dissipation fins 405 and the fixing plate 406, the heat dissipation area can be increased, thereby improving the cooling effect on the liquid.

[0044] It should be noted that, under the detection of the temperature sensor 207, when the temperature of the liquid entering the heating unit 300 is low, that is, when the difference between the surface temperature of the steel pipe column and the set temperature is greater than ±5°C, the heating belt 303 in the heating unit 300 starts to work to heat the liquid in the water supply pipe 301 and the outside of the steel pipe column 100. When the temperature sensor 207 detects the temperature outside the steel pipe column 100, the constant temperature heating is automatically stopped after reaching the set temperature. The set temperature changes with the change of air temperature. At the same time, in actual use, multiple relays can be installed on the heating belt 303 as needed to realize the control of the working state of some sections of the heating belt 303. For example, when the temperature near the water outlet side of the heating unit 300 is low, the heating belt 303 of this section is controlled by the relay to realize local heating of the steel pipe column 100, thereby further improving the utilization rate of energy.

[0045] like Figure 7 As shown, a plurality of ventilation holes 407 are provided on opposite sides of the box body 401, two connecting plates 409 are provided on the inner wall of the box body 401, a plurality of sealing rings 410 are provided on the side of the connecting plate 409 opposite to the ventilation holes 407, a plurality of blocking plates 408 corresponding to the ventilation holes 407 are provided on the connecting plate 409, two double-threaded screw rods 411 are threadedly connected to the two connecting plates 409, a synchronous wheel 412 is provided on the two double-threaded screw rods 411, and a synchronous belt 413 is sleeved on the two synchronous wheels 412.

[0046] Furthermore, one side of the box body 401 is rotatably connected to multiple drive shafts 414, one end of the drive shaft 414 extends to the interior of the box body 401 and is provided with a fan blade 418, and one side of the box body 401 is provided with a motor 415, and the output shaft of the motor 415 and the ends of the multiple drive shafts 414 are provided with a synchronous wheel 416, and the multiple synchronous wheels 416 are sleeved with a synchronous belt 417, and a cooling module 419 is provided at the bottom of the inner wall of the box body 401.

[0047] Specifically, in order to improve the cooling effect of the liquid in the heat-conducting curved pipe 404 in the box body 401, when the external ambient temperature is low, the staff rotates the double-threaded screw 411 and makes the double-threaded screw 411 rotate synchronously under the transmission of the synchronous wheel 1 412 and the synchronous belt 1 413, and the two connecting plates 409 start to move towards each other under the action of the threads, so that the box body 401 is connected to the outside through the ventilation holes 407 on both sides, and then the motor 415 is controlled to work to rotate the fan blades 418, so that the external cold air is sucked in. The liquid in the heat-conducting curved pipe 404 is cooled by injecting a proper amount of water into the box 401. When the external ambient temperature is high, the staff rotates the double-threaded screw 411 to make the connecting plate 409 fit with the inner wall of the box 401, and seals the ventilation hole 407 under the action of the blocking plate 408 and the sealing ring 410. Then, the fan blade 418 stirs the water, thereby improving the cooling effect on the liquid in the heat-conducting curved pipe 404.

[0048] A construction method for a steel tube concrete column with high inner wall bonding quality, the specific steps comprising:

[0049] The steel pipe column 100 is hoisted to a designated position, and then the cooling unit 200 is installed in the steel pipe column 100 by welding. After the cooling unit 200 is installed, a water pressure test is performed;

[0050] Mark the test section on the steel pipe column 100, then mark the marking points on the test section, install the heating unit 300 from top to bottom according to the marking points, connect the heating unit 300 to the power connection box, and then inspect and test the heating unit 300;

[0051] Concrete is poured into the steel pipe column 100, and the outer peripheral side of the steel pipe column 100 is heated by the heating unit 300. The constant temperature of the heating unit 300 is T0+30°C, wherein T0 is the transient air temperature (i.e., the ambient transient temperature), so as to preheat the steel pipe column 100. The heat near the cooling unit 200 is taken away by circulating low-temperature liquid inside the cooling unit 200, and the concrete is cooled to reduce the peak temperature of the concrete inside the steel pipe column 100.

[0052] When the heating unit 300 is installed, install the power junction box, open the power junction box, remove the terminal block and rubber plug, and insert the heating tape 303 from under the junction box, install the rubber plug and baffle in the junction box, insert the power cord from the power inlet into the junction box, place the heating tape 303 and the power cord in the wire nose respectively, after the wiring is completed, cover the box cover, and then check the heating tape 303, including whether the surface of the heating tape 303 is damaged, whether all accessories are installed completely, and then use a 2500V megohmmeter to test the insulation resistance of the system. The insulation resistance between the core wire of the heating tape 303 and the ground wire or the neutral wire without power should be greater than 2MΩ. Test the DC resistance of the system to see if its resistance value corresponds to the total power of the measured system. Note that the test time should be more than one minute, and the results should be recorded on the installation record sheet. After all tests are normal, test power supply (when checking and testing on the distribution box side, it should be noted that the contacts of the thermostat must be in the "closed" state).

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel tube concrete column with high inner wall bonding quality, characterized in that: The invention comprises a steel pipe column, wherein a cooling unit for cooling concrete is arranged inside the steel pipe column, and a heating unit is coated on the outer periphery of the steel pipe column, and the cooling unit and the heating unit are used to adjust the pre-temperature difference of the steel pipe column for pouring concrete so as to realize pre-deformation; The cooling unit includes multiple cooling water pipes, which are vertically arranged in a steel pipe column, one of which is located in the middle of the steel pipe column, and the other cooling water pipes are arranged circumferentially. The bottom end of the cooling water pipe located in the middle is a water inlet end, and the multiple cooling water pipes are connected in sequence through multiple connecting pipes, and the cooling water pipes and the connecting pipes are connected through a two-way elbow. Two steel reinforcements are provided on the multiple cooling water pipes, and multiple temperature sensors are provided in sequence from top to bottom on the inner wall and outer wall of the steel pipe column and the multiple cooling water pipes.

2. A steel tube concrete column with high inner wall bonding quality according to claim 1, characterized in that: The steel reinforcement member includes a plurality of fixing seats, each of which is connected to a cooling water pipe. Fixed steel bars and oblique steel bars are arranged between two adjacent fixing seats, and one side of each fixing seat is connected to the inner wall of the steel pipe column through an extension portion.

3. The steel tube concrete column with high inner wall bonding quality according to claim 1, characterized in that: The plurality of temperature sensors are divided into three groups from top to bottom, with an interval of 1000 mm between two adjacent groups of temperature sensors, and the number of temperature sensors in each group is thirteen.

4. The steel tube concrete column with high inner wall bonding quality according to claim 1, characterized in that: The cooling water pipe is sequentially provided with a plurality of heat-conducting sleeves from top to bottom, the outer peripheral surface of the heat-conducting sleeve is provided with a plurality of cooling fins, and the cooling fins are provided with a plurality of through holes.

5. The steel tube concrete column with high inner wall bonding quality according to claim 1, characterized in that: The heating unit includes a heating belt, which is spirally wound around the outer circumference of the steel pipe column. The heating belt is connected to the steel pipe column through an aluminum tape. A water supply pipe is provided between the heating belt and the steel pipe column. The water in the water supply pipe is heated by the heating belt to achieve heating of the outside of the steel pipe column. The outside of the aluminum tape is covered with an insulation cover.

6. The steel tube concrete column with high inner wall bonding quality according to claim 1, characterized in that: It also includes a circulation unit, which includes a box body, a water outlet pipe and a water inlet pipe are arranged on one side of the box body, one end of the water outlet pipe is connected to the bottom end of the cooling water pipe located in the middle, the other end of the water outlet pipe extends to the interior of the box body and is provided with a heat conduction bent pipe, the water inlet end of the heat conduction bent pipe is connected to the water inlet pipe, and a plurality of heat dissipation fins are arranged on the heat conduction bent pipe in sequence from top to bottom, and the plurality of heat dissipation fins are connected to the inner wall of the box body through a fixing plate.

7. A steel tube concrete column with high inner wall bonding quality according to claim 6, characterized in that: Multiple ventilation holes are provided on opposite sides of the box body, two connecting plates are provided on the inner wall of the box body, multiple sealing rings are provided on the side of the connecting plate opposite to the ventilation holes, multiple blocking plates corresponding to the ventilation holes are provided on the connecting plates, two double-threaded screw rods are threadedly connected to the two connecting plates, and a synchronous wheel is provided on the two double-threaded screw rods, and the two synchronous wheels are connected with a synchronous belt.

8. The steel tube concrete column with high inner wall bonding quality according to claim 6, characterized in that: One side of the box is rotatably connected to multiple drive shafts, one end of the drive shaft extends to the interior of the box and is provided with fan blades, one side of the box is provided with a motor, the output shaft of the motor and the ends of the multiple drive shafts are provided with synchronous wheels 2, multiple synchronous wheels 2 are sleeved with synchronous belts 2, and a cooling module is provided at the bottom of the inner wall of the box.

9. The steel tube concrete column with high inner wall bonding quality according to claim 6, characterized in that: The water outlet of the cooling unit is connected to the water inlet of the heating unit, and the water outlet of the heating unit is connected to the water inlet pipe.

10. A construction method for a steel tube concrete column with high inner wall bonding quality as claimed in any one of claims 1 to 9, characterized in that: The specific steps include: The steel pipe column is hoisted to the designated position, and then the cooling unit is installed in the steel pipe column by welding. After the cooling unit is installed, a water pressure test is performed; Mark the test section on the steel pipe column, then mark the marking points on the test section, install the heating unit from top to bottom according to the marking points, connect the heating unit to the power junction box, and then inspect and test the heating unit; Concrete is poured into the steel pipe column, and the outer peripheral side of the steel pipe column is heated by a heating unit. The constant temperature of the heating unit is T0+30℃, where T0 is the transient air temperature (i.e., the ambient transient temperature). The steel pipe column is preheated, and the heat near the cooling unit is taken away by circulating low-temperature liquid inside the cooling unit to cool the concrete, thereby reducing the peak temperature of the concrete inside the steel pipe column.

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