A concrete-filled steel tube column with high inner wall bonding quality and its construction method

Abstract

The present invention discloses a concrete-filled steel tube column with high inner wall bonding quality and its construction method, belonging to the technical field of building construction. It includes a steel tube column, and a cooling unit for cooling the concrete is arranged inside the steel tube column. The outer periphery of the steel tube column is coated with a heating unit. The cooling unit and the heating unit are used to adjust the pre-temperature difference of the steel tube column for pouring concrete so as to achieve pre-deformation. Through the combination of the above two methods, the structural damage caused by excessive temperature of the concrete inside the steel tube column is reduced. Pre-deformation is achieved through the pre-temperature difference, that is, the pre-expansion of the steel tube column and the pre-shrinkage of the concrete. After canceling the temperature control in the later stage, under the influence of temperature, the steel tube column shrinks and the concrete expands, making the two fit more closely, which is beneficial to maintaining the later stiffness of the concrete-filled steel tube column.

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 bar reinforcement member includes a plurality of fixing seats, the plurality of fixing seats are respectively connected to the cooling water pipes, a fixing steel bar and an inclined steel bar 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 part.

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

[0009] Preferably, a plurality of heat conduction sleeves are sequentially arranged on the cooling water pipes from top to bottom, a plurality of cooling fins are arranged on the outer peripheral surface of the heat conduction sleeves, and a plurality of through holes are formed in the cooling fins.

[0010] Preferably, the heating unit includes a heating tape, the heating tape is spirally wound around the outer peripheral surface of the steel pipe column, the heating tape is connected to the steel pipe column through an aluminum tape, a water supply pipe is arranged between the heating tape and the steel pipe column, and the water in the water supply pipe is heated by the heating tape to realize the heating work on the outer side of the steel pipe column, and a heat preservation cover is coated on the outer peripheral side of the aluminum tape.

[0011] Preferably, a circulation unit is further included, the circulation unit 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 into the interior of the box body and is provided with a heat conduction elbow, the water inlet end of the heat conduction elbow is connected to the water inlet pipe, a plurality of heat dissipation fins are sequentially arranged on the heat conduction elbow 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, a plurality of ventilation holes are formed on both opposite sides of the box body, two connecting plates are arranged on the inner wall of the box body, a plurality of sealing rings are arranged on one side of the connecting plate opposite to the ventilation holes, a plurality of blocking plates corresponding to the ventilation holes are arranged on the connecting plates, two double-threaded lead screws are threadedly connected to the two connecting plates, a first synchronous pulley is arranged on each of the two double-threaded lead screws, and a first synchronous belt is sleeved on the two first synchronous pulleys.

[0013] Preferably, a plurality of drive shafts are rotatably connected to one side of the box body, one end of the drive shaft extends into the interior of the box body and is provided with a fan blade, a motor is arranged on one side of the box body, a second synchronous pulley is arranged on the output shaft of the motor and the end of each drive shaft, a second synchronous belt is sleeved on the plurality of second synchronous pulleys, and a cooling module is arranged at the bottom of the inner wall of the box body.

[0014] Preferably, the water outlet end of the cooling unit is connected to the water inlet end of the heating unit, and the water outlet end 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 is a schematic structural diagram of the circulation unit of the present invention;

[0028] Figure 7 is an exploded view of the internal structure of the box body of the present invention;

[0029] Figure 8 is a schematic structural diagram of the heat-conducting 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, fixed seat; 204, fixed steel bar; 205, extension part; 206, diagonal steel bar; 207, temperature sensor; 208, heat-conducting sleeve; 209, cooling fin; 210, through hole; 300, heating unit; 301, water supply pipeline; 302, aluminum tape; 303, heat tracing tape; 304, heat preservation cover; 400, circulation unit; 401, box body; 402, water outlet pipe; 403, water inlet pipe; 404, heat-conducting elbow; 405, heat dissipation fin; 406, fixing plate; 407, ventilation hole; 408, plugging plate; 409, connecting plate; 410, sealing ring; 411, double-threaded lead screw; 412, synchronous pulley one; 413, synchronous belt one; 414, driving shaft; 415, motor; 416, synchronous pulley two; 417, synchronous belt two; 418, fan blade; 419, cooling module. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-8 , the present invention provides a technical solution:

[0034] Such as Figure 1As shown in the figure, a concrete-filled steel tube column with high inner wall bonding quality includes a steel tube column 100. A cooling unit 200 for cooling the concrete is arranged inside the steel tube column 100, and a heating unit 300 is covered 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, so as to achieve pre-deformation. Through the combination of the above two methods, the structural damage of the concrete inside the steel tube column 100 caused by too high temperature is reduced. Pre-deformation is achieved through the pre-temperature difference, that is, the pre-expansion of the steel tube column 100 and the pre-shrinkage of the concrete. After the temperature control is cancelled later, under the influence of temperature, the steel tube column 100 shrinks and the concrete expands, making the two fit more closely, which is beneficial to maintaining the later stiffness of the concrete in the steel tube column 100.

[0035] As Figure 2 shown, the cooling unit 200 includes a plurality of cooling water pipes 201. The cooling water pipes 201 are vertically arranged inside the steel tube column 100. One of the cooling water pipes 201 is located in the middle of the steel tube column 100, and the rest of the cooling water pipes 201 are arranged circumferentially. The bottom end of the cooling water pipe 201 in the middle is the water inlet end. The plurality of cooling water pipes 201 are sequentially connected through a plurality of connecting pipes 202. The cooling water pipes 201 and the connecting pipes 202 are connected through two-way elbows. Two steel bar reinforcement members are arranged on the plurality of cooling water pipes 201. A plurality of temperature sensors 207 are sequentially arranged from top to bottom on the inner wall and outer wall of the steel tube column 100 and on the plurality of cooling water pipes 201.

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

[0037] Further, as Figure 4 shown, the steel bar reinforcement member includes a plurality of fixing seats 203. The plurality of fixing seats 203 are respectively connected to the cooling water pipes 201. A fixing steel bar 204 and an inclined steel bar 206 are arranged between adjacent two fixing seats 203. One side of each fixing seat 203 is connected to the inner wall of the steel tube column 100 through an extension part 205.

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

[0039] As Figure 5 shown, the cooling water pipe 201 is successively provided with a plurality of heat conduction sleeves 208 from top to bottom. A plurality of cooling fins 209 are arranged on the outer peripheral surface of the heat conduction sleeve 208. A plurality of through holes 210 are formed in the cooling fins 209. By arranging the heat conduction sleeve 208 and the cooling fins 209, when the cooling unit 200 cools and reduces the temperature of the concrete, the cooling range of the concrete can be improved, and the cooling effect on the concrete can also be improved.

[0040] As Figure 3 shown, the heating unit 300 includes a heating tape 303. The heating tape 303 is spirally wound around the outer peripheral surface of the steel pipe column 100. The heating tape 303 is connected to the steel pipe column 100 through an aluminum tape 302. A water supply pipe 301 is arranged between the heating tape 303 and the steel pipe column 100. The water in the water supply pipe 301 is heated by the heating tape 303 to realize the heating work on the outside of the steel pipe column 100. The outside of the aluminum tape 302 is covered with a heat preservation cover 304.

[0041] Among them, 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 make marks. Mark the test section on the steel pipe column 100 with a whiteboard pen, and then make marks every 20 cm on the test section. Mark 8 points on each circumference, and the point spacing is 45°. When installing the heating tape 303, first connect the heating tape 303 to the water supply pipe 301, and then reserve a length of 50 cm - 100 cm at the head end of the heating tape 303. Then, spiral-wind the steel pipe column 100 from top to bottom according to the marked points, and at the same time arrange the aluminum tape 302 along the heating tape 303 to stick the heating tape 303 and the water supply pipe 301 on the surface of the steel pipe column 100. Then, lay the heat preservation cover 304 on the outside of the aluminum tape 302. During the arrangement of the heating tape 303, reserve 2.5 m at each of the power supply point and the tail end of the heating tape 303 for power access. Further, the resistance wire in the heating tape 303 is bundled with 50 mm thick flame-retardant rubber and plastic heat preservation cotton for heat preservation.

[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 during the solidification of the concrete can be recycled. That is, by using the heat generated during the solidification of the concrete, the temperature of the liquid in the cooling unit 200 is increased. When the heat generated during the solidification of the concrete increases the liquid temperature, the liquid with the increased temperature then enters the heating unit 300 to heat the outside of the steel pipe column 100, thereby further reducing the energy loss when the heating tape 303 is used.

[0043] As Figure 6and Figure 8 As shown, it further includes a circulation unit 400. The circulation unit 400 includes a box body 401. One side of the box body 401 is provided with a water outlet pipe 402 and a water inlet pipe 403. 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 into the interior of the box body 401 and is provided with a heat-conducting elbow 404. The water inlet end of the heat-conducting 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. A plurality of heat dissipation fins 405 are sequentially arranged on the heat-conducting elbow 404 from top to bottom. The plurality of heat dissipation fins 405 are connected to the inner wall of the box body 401 through a fixing plate 406. When recycling the liquid in the cooling unit 200, the cooled liquid in the box body 401 is sent into the cooling unit 200 through the water outlet pipe 402 by a pump body. The liquid in the cooling unit 200 cools the heat generated during the solidification of the concrete. During this process, the liquid is heated. 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 relatively low, that is, when the temperature difference between the surface temperature of the steel pipe column and the set temperature is greater than ±5°C, the heating tape 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 and reaches the set temperature, the constant temperature heating automatically stops. The set temperature changes with the ambient temperature. At the same time, in actual use, multiple relays can be installed on the heating tape 303 as needed to control the working state of some sections of the heating tape 303. For example, when the temperature near the water outlet side of the heating unit 300 is relatively low, the heating tape 303 in this section is controlled by a relay to achieve local heating of the steel pipe column 100, thereby further improving the energy utilization rate.

[0045] As Figure 7 shown, a plurality of ventilation holes 407 are opened on both opposite sides of the box body 401. Two connecting plates 409 are arranged on the inner wall of the box body 401. A plurality of sealing rings 410 are arranged 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 arranged on the connecting plates 409. Two double-threaded lead screws 411 are threadedly connected to the two connecting plates 409. Synchronous pulleys one 412 are arranged on the two double-threaded lead screws 411. The two synchronous pulleys one 412 are sleeved with a synchronous belt one 413.

[0046] Further, a plurality of drive shafts 414 are rotatably connected to one side of the box body 401. One end of the drive shaft 414 extends into the box body 401 and is provided with a fan blade 418. A motor 415 is arranged on one side of the box body 401. Synchronous pulleys II 416 are arranged on the output shaft of the motor 415 and the ends of the plurality of drive shafts 414. A synchronous belt II 417 is sleeved on the plurality of synchronous pulleys II 416. A cooling module 419 is arranged at the bottom of the inner wall of the box body 401.

[0047] Specifically, in order to improve the cooling effect on the liquid in the heat-conducting bent pipe 404 in the box body 401, when the external environmental temperature is relatively low, the staff rotates the double-threaded lead screw 411, and under the transmission of the synchronous pulley I 412 and the synchronous belt I 413, the double-threaded lead screw 411 rotates synchronously. Under the action of the thread, the two connecting plates 409 start to move towards each other, so that the inside of the box body 401 is communicated with the outside through the ventilation holes 407 on both sides. Then, the motor 415 is controlled to work to make the fan blade 418 rotate, so as to suck the external cold air into the box body 401 to cool the liquid in the heat-conducting bent pipe 404. When the external environmental temperature is relatively high, the staff rotates the double-threaded lead screw 411 to make the connecting plate 409 fit with the inner wall of the box body 401. Under the action of the plug plate 408 and the sealing ring 410, the ventilation holes 407 are sealed. Then, an appropriate amount of water is injected into the box body 401, and the water is cooled under the action of the cooling module 419. At this time, the fan blade 418 plays a role in stirring the water, so as to improve the cooling effect on the liquid in the heat-conducting bent pipe 404.

[0048] A construction method for a concrete-filled steel tubular column with high inner wall bonding quality, the specific steps include:

[0049] Lift the steel pipe column 100 to the designated position, and then install the cooling unit 200 in the steel pipe column 100 by welding. After the installation of the cooling unit 200 is completed, a water pressure test is carried out;

[0050] Mark the test section on the steel pipe column 100, and then mark the marking points on the test section. Install the heating unit 300 from top to bottom according to the marking points. After connecting the heating unit 300 to the power supply junction box, check and test the heating unit 300;

[0051] Pour the concrete into the steel pipe column 100, and heat the outer peripheral side of the steel pipe column 100 through the heating unit 300. The constant temperature of the heating unit 300 is T0 + 30°C, where T0 is the transient air temperature (i.e., the ambient transient temperature), to realize the preheating of the steel pipe column 100. The low-temperature liquid flowing inside the cooling unit 200 takes away the heat near the cooling unit 200 to cool the concrete, so as to reduce the peak temperature of the concrete inside the steel pipe column 100.

[0052] After the heating unit 300 is installed, install the power connection box. Open the power connection box, remove the terminal block and the rubber plug, pass the tracing tape 303 through from below the connection box, install the rubber plug and the baffle inside the connection box, pass the power cord through the power inlet into the connection box, place the tracing tape 303 and the power cord in the wire nose respectively. After wiring is completed, cover the box lid, and then check the tracing tape 303. Among them, it is necessary to check whether the surface of the tracing tape 303 is damaged and whether all accessories are installed completely. Then use a 2500V megohmmeter to test the insulation resistance of the system. The insulation resistance between the core wire of the tracing tape 303 and the ground wire or the uncharged neutral wire should be greater than 2MΩ. Test the DC resistance of the system to see if its value corresponds to the total power of the measured system. Note that the test time should be more than one minute and record the results on the installation record sheet. After all tests are normal, trial power transmission can be carried out (when checking and testing on the distribution box side, it should be noted that the contacts of the temperature controller must be in the "closed" state).

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction method for a steel tube concrete column with high inner wall bonding quality, 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°C, where T0 is the transient air temperature, that is, the transient temperature of the environment, to achieve preheating of the steel pipe column. The heat near the cooling unit is taken away by circulating low-temperature liquid inside the cooling unit to cool the concrete, which is used to reduce the peak temperature of the concrete inside the steel pipe column; Wherein, a cooling unit for cooling concrete is arranged in 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 a plurality of cooling water pipes, which are vertically arranged in the 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 the water inlet end, the plurality of cooling water pipes are connected in sequence through a plurality of connecting pipes, the cooling water pipes and the connecting pipes are connected through a two-way elbow, 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 outer wall of the steel pipe column and the plurality of cooling water pipes; 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 inside of the box body and is provided with a heat conduction elbow, the water inlet end of the heat conduction elbow is connected to the water inlet pipe, and a plurality of heat dissipation fins are arranged on the heat conduction elbow 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; A plurality of ventilation holes are provided on opposite sides of the box body, two connecting plates are provided on the inner wall of the box body, a plurality of sealing rings are provided on the side of the connecting plate opposite to the ventilation holes, a plurality of 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, a synchronous wheel is provided on the two double-threaded screw rods, and a synchronous belt is connected to the two synchronous wheels; 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.

2. The construction method of 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 construction method of a 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 construction method of a 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 construction method of a 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 construction method of a steel tube concrete column with high inner wall bonding quality according to claim 1, 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.

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