A pouring device for construction of a concrete filled steel tube column and a construction method thereof

Abstract

The application relates to the technical field of steel pipe concrete column construction, and discloses a pouring device for steel pipe concrete column construction and a construction method thereof. The pouring device comprises a steel pipe body, the bottom of the steel pipe body is provided with a column pouring opening, the top of the steel pipe body is provided with an exhaust hole, the bottom of the steel pipe body is provided with a mounting seat, the mounting seat is provided with a pouring hole corresponding to the column pouring opening, a pouring pipe is arranged in the pouring hole in a penetrating mode, one end of the pouring pipe is connected with a control valve, and the other end of the pouring pipe is provided with a pouring opening; a sealing pipe moves synchronously with a driving block through a limiting plate, a moving plate, a rotating rod and a driving arm; the outer wall of the sealing pipe is in sliding sealing cooperation with the inner wall of the pouring pipe; the control valve has a pouring state and a flushing state; in the pouring state, a concrete pumping pipe is communicated with the pouring pipe, and the sealing pipe opens the pouring opening; in the flushing state, a flushing pumping pipe is communicated with the pouring pipe, and the sealing pipe closes the pouring opening, so that a flushing medium is discharged through a recovery pipe.

Description

Technical Field

[0001] This application relates to the field of steel-concrete composite column construction technology, and in particular to a pouring device and construction method for steel-concrete composite column construction. Background Technology

[0002] During the construction of steel-concrete composite columns, concrete is usually pumped into the steel pipe through a pouring port set at the bottom or side of the steel pipe body, so that the concrete gradually fills the inside of the steel pipe from bottom to top. During the pouring process, the air inside the steel pipe needs to be discharged in time through the top vent hole to reduce air bubbles, cavities or local non-compactment problems.

[0003] Existing concrete-tube steel column casting devices often use a casting pipe that is directly connected to the casting port of the steel pipe body. After casting is completed, or when residual slurry adheres to or clogs the casting pipe, it is usually necessary to flush the casting pipe. Because the casting pipe is connected to the inside of the steel pipe body, the flushing medium can easily enter the inside of the steel pipe body through the casting port and mix with the already cast concrete, which may change the local water-cement ratio of the concrete and affect the molding quality of the concrete-tube steel column. At the same time, if the residual slurry in the casting pipe is not discharged in time, it can easily solidify and clog the casting pipe, affecting the subsequent use of the device. Summary of the Invention

[0004] This application proposes a pouring device and construction method for steel-concrete composite column construction, which has the advantages of avoiding the entry of the medium into the steel pipe body during the cleaning of the pouring pipe, thus preventing changes in the local concrete water-cement ratio and improving the efficiency of residual slurry discharge. This solves the problem that the rinsing medium in existing pouring devices easily enters the steel pipe body and the residual slurry is difficult to discharge when rinsing the pouring pipe.

[0005] To achieve the above objectives, this application adopts the following technical solution: a pouring device and construction method for steel-concrete composite column construction, further comprising a steel pipe body, wherein the bottom of the steel pipe body is provided with a column pouring port and the top is provided with a vent hole, the bottom of the steel pipe body is provided with a mounting base, the mounting base is provided with a pouring hole corresponding to the column pouring port, a pouring pipe is inserted through the pouring hole, one end of the pouring pipe is connected to a control valve, and the other end has a pouring port on its side wall; the control valve is respectively connected to a concrete pumping pipe and a flushing pumping pipe, the control valve is provided with a rotating shaft and a sealing plate that rotates with the rotating shaft, and a driving block is provided on the rotating shaft; the pouring... A closed pipe is slidably installed inside the pouring pipe. The closed pipe is connected to the driving block and can slide relative to the pouring pipe as the driving block moves. The outer wall of the closed pipe slides and seals against the inner wall of the pouring pipe. A recovery pipe communicating with its inner cavity is provided on the pouring pipe. The control valve has a pouring state and a flushing state. In the pouring state, the sealing plate connects the concrete pumping pipe to the pouring pipe, and the closed pipe opens the pouring port. In the flushing state, the sealing plate connects the flushing pumping pipe to the pouring pipe, and the driving block moves the closed pipe to a position that blocks the pouring port, so as to prevent the flushing medium from entering the steel pipe body through the pouring port and to discharge the flushing medium through the recovery pipe.

[0006] Furthermore, an operating handle is provided on the rotating shaft, and valve seat sealing rings are respectively provided at the ports where the concrete pumping pipe and the flushing pumping pipe communicate with the valve chamber of the control valve. When the sealing plate rotates to the corresponding position, it presses against the corresponding valve seat sealing ring to selectively seal the concrete pumping pipe or the flushing pumping pipe.

[0007] Furthermore, the closed tube moves synchronously with the drive block via a limiting plate, a moving plate, a rotating rod, and a drive arm; one end of the drive arm is connected to the drive block, and the other end is connected to the moving plate via the rotating rod; the moving plate is connected to the limiting plate, and the limiting plate is connected to the closed tube.

[0008] Furthermore, one end of the closed pipe is provided with multiple sets of connecting grooves, which are adapted to the pouring port; when the control valve is in the pouring state, the connecting grooves are connected to the pouring port, so that concrete can enter the interior of the steel pipe body through the pouring port; when the control valve is in the flushing state, the connecting grooves are misaligned with the pouring port, and the pipe wall of the closed pipe blocks the pouring port.

[0009] Furthermore, the recovery pipe is connected to the casting pipe through a through-hole, and a recovery valve is provided on the recovery pipe; when the control valve is in the flushing state, the through-hole is still connected to the inner cavity of the casting pipe, so that the flushing pump pipe, control valve, casting pipe, through-hole and recovery pipe form a flushing and recovery path.

[0010] Furthermore, at least two sets of annular sealing rings are provided on the outer periphery of the closed tube, and the annular sealing rings slide against the inner wall of the casting tube; when the control valve is in the flushing state, at least two sets of annular sealing rings are respectively located on both sides of the axial direction of the casting port, so as to restrict the flushing medium from entering the casting port from the gap between the closed tube and the casting tube.

[0011] Furthermore, a limiting ring is provided on the concrete pumping pipe, the rotating shaft passes through the limiting ring, and a limiting part is provided on the limiting ring. The limiting part forms a limiting area for limiting the rotation range of the driving block. The limiting area includes a pouring limiting position and a flushing limiting position. When the driving block is in the pouring limiting position, the sealing plate is in the pouring passage conduction position and the connecting groove is correspondingly connected to the pouring port. When the driving block is in the flushing limiting position, the sealing plate is in the flushing passage conduction position and the pipe wall of the sealing pipe blocks the pouring port.

[0012] Furthermore, a swirling guide plate is provided on the inner wall of the end of the pouring pipe near the pouring port, and the swirling guide plate is arranged in a spiral shape; an installation ring is provided on the inner wall of the pouring pipe, and a guide cone is provided on the inner wall of the installation ring. The guide cone is used to disperse the concrete guided by the swirling guide plate to the pouring port; a flow groove is opened on the guide cone, and the flow groove is arranged at intervals along the outer periphery of the guide cone.

[0013] Furthermore, a mounting ring is provided at the top of the steel pipe body, and an exhaust cylinder communicating with the exhaust port is provided on the mounting ring. A limit ring is provided on the inner wall of the exhaust cylinder, and a moving rod is slidably provided inside the limit ring. A floating bladder is provided at one end of the moving rod, and an indicator head is provided at the other end. A sealing ring is provided between the moving rod and the limit ring. A discharge pipe is provided on the exhaust cylinder, and the discharge pipe is used to discharge the residual slurry entering the exhaust cylinder. A pressure detector is provided on the casting pipe.

[0014] This application also provides a pouring construction method for steel-concrete composite columns, comprising the following steps: S1. Install the mounting base at the bottom of the steel pipe body, so that the pouring hole on the mounting base corresponds to the column pouring port at the bottom of the steel pipe body, and make the pouring pipe connect with the inside of the steel pipe body through the pouring hole. S2. Connect the concrete pumping pipe to the concrete delivery pump, connect the recovery pipe to the external collection structure, and connect the discharge pipe to the external residual slurry collection structure, so that the recovery valve is in the closed state. S3. Rotate the operating handle to put the control valve into the pouring state; in the pouring state, the sealing plate seals the flushing pump pipe, the concrete pump pipe is connected to the pouring pipe, and the connecting groove on the sealing pipe is connected to the pouring port on the pouring pipe. S4. Start the concrete delivery pump so that the concrete enters the steel pipe body through the concrete pumping pipe, control valve and pouring pipe; when the concrete passes through the pouring pipe, it is guided by the swirl guide plate and dispersed by the guide cone and then enters the steel pipe body through the pouring port. S5. During the pouring process, the gas inside the steel pipe enters the exhaust stack through the top exhaust hole and is discharged. When the concrete reaches the vicinity of the exhaust stack, the floating bladder moves the moving rod and the indicator head to indicate the concrete arrival status. The remaining slurry that enters the exhaust stack is discharged through the discharge pipe.

[0015] This application also provides a method for flushing and cleaning a pouring device used in the construction of steel-concrete composite columns, comprising the following steps: S1. After pouring is completed, or when construction personnel determine the risk of residual slurry blockage in the pouring pipe or control valve based on the pressure detection value of the pressure detector, the operating resistance of the operating handle, the pump stop time, and the state of residual slurry in the pouring pipe, stop or reduce the concrete pumping; wherein, the pressure detection value of the pressure detector exceeding the preset pressure threshold or the pressure rise rate exceeding the preset change rate and lasting for a preset time, and the indicator head not showing that the concrete has reached the top, is used as an auxiliary condition for determining the risk of residual slurry blockage in the pouring pipe or control valve. S2. Open the recovery valve, connect the flushing pump pipe to the flushing pump, connect the recovery pipe to the external collection structure, and depressurize the casting pipe through the recovery pipe. S3. Rotate the operating handle to switch the control valve from the pouring state to the flushing state. In the flushing state, the sealing plate blocks the concrete pumping pipe, and the flushing pumping pipe is connected to the pouring pipe. At the same time, the drive block drives the closed pipe to move through the drive arm, rotating rod, moving plate and limiting plate, so that the connecting groove is misaligned with the pouring port and the pipe wall of the closed pipe blocks the pouring port. S4. Start the flushing pump so that the flushing medium enters the pouring pipe through the flushing pump delivery pipe and control valve. S5. Because the pouring port is blocked by the closed pipe, the flushing medium cannot enter the steel pipe body through the pouring port. Instead, it carries the residue in the pouring pipe and discharges into the external collection structure through the through-hole and the recovery pipe. S6. After flushing is completed, turn off the flushing pump; before the column pouring port of the steel pipe body is sealed or the device is removed, keep the control valve in the flushing state so that the closed pipe continuously blocks the pouring port.

[0016] The beneficial effects of this invention are as follows: This application provides a pouring device and construction method for steel-concrete composite column construction. Compared with existing steel-concrete composite column pouring joints, which typically only control the opening and closing of the pumping passage through a stop valve, sealing plate, or anti-backflow component, and still require construction personnel to separately seal the pouring port when flushing the pouring pipe, which can easily lead to problems such as flushing medium entering the steel pipe body or inconsistent sealing timing, this application sets the sealing plate and drive block on the same rotating shaft, and drives the closed pipe to slide synchronously through the drive arm, rotating rod, moving plate, and limiting plate. When the control valve is switched to the flushing state, the closed pipe synchronously blocks the pouring port, avoiding the risks of misoperation and delayed sealing caused by operating the valve or sealing the pouring port separately, and reducing the possibility of flushing medium entering the steel pipe body and affecting the water-cement ratio of the poured concrete.

[0017] This application provides a pouring device and construction method for steel-concrete composite column construction. Compared with the existing technology that only sets flushing pipes, slurry outlets, or bottom panels at the pumping pipe or transfer pipe, the flushing medium may enter the interior of the steel-concrete column along the original pouring channel, or the residual slurry can only be discharged from a local low position, making it difficult to form a clear closed recovery path. This application, while blocking the pouring port with a closed pipe, makes the flushing pumping pipe, control valve, pouring pipe, through port, and recovery pipe form a flushing and recovery path, and limits the through port to the area that is still connected to the inner cavity of the pouring pipe under the closed pipe flushing state. Thus, without opening the pouring port, the flushing medium can carry the residual slurry in the pouring pipe out through the recovery pipe, reducing the risk of residual slurry solidifying and clogging in the pouring pipe, while avoiding the backflow of flushing water or thin slurry into the steel pipe body.

[0018] This application provides a pouring device and construction method for steel-concrete composite column construction. Existing switchable grouting holes or anti-backflow valve structures typically only focus on opening and closing the pouring port or preventing concrete backflow, which can easily lead to an intermediate state where the valve has been switched but the pouring port is not fully open or closed. This application limits the pouring and flushing positions of the drive block by using a limiting ring, and ensures that the two limiting positions correspond to the connection groove and the pouring port coinciding, and the pipe wall of the sealing pipe completely covering the pouring port, respectively. This establishes a definite correspondence between the passage state of the control valve and the axial position of the sealing pipe, reducing the construction risks caused by crossflow between the concrete pumping pipe and the flushing pumping pipe, partial opening and closing of the pouring port, and incomplete sealing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the mounting base and the pouring pipe of the present invention. Figure 3 This is a three-dimensional structural diagram of the control valve of the present invention; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the casting pipe and control valve of the present invention; Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the casting pipe and control valve of the present invention from another perspective; Figure 6 This is a three-dimensional structural diagram of the pressure detector and pouring port of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the swirl guide plate of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the guide cone of the present invention; Figure 9 This is a partial cross-sectional three-dimensional structural diagram of the exhaust pipe of the present invention.

[0020] In the diagram: 1. Steel pipe body; 2. Mounting base; 3. Pouring hole; 4. Pouring pipe; 5. Control valve; 6. Concrete pumping pipe; 7. Flushing pumping pipe; 8. Restricting ring; 9. Rotating shaft; 10. Operating handle; 11. Drive block; 12. Sealing plate; 13. Drive arm; 14. Rotating rod; 15. Moving plate; 16. Restricting plate; 17. Sealing pipe; 18. Connecting groove; 19. Through port; 20. Recovery pipe; 21. Pouring port; 22. Pressure detector; 23. Swirl guide plate; 24. Mounting ring; 25. Guide cone; 26. Flow groove; 27. Exhaust pipe; 28. Mounting fixing ring; 29. ​​Limiting ring; 30. Moving rod; 31. Floating bladder; 32. Indicator head; 33. Sealing ring; 34. Discharge pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, as Figure 1 and Figure 2As shown, this embodiment provides a pouring device for the construction of steel-concrete composite columns, including a steel pipe body 1; the bottom of the steel pipe body 1 is provided with a column pouring port, and the top is provided with a vent hole; the bottom of the steel pipe body 1 is provided with a mounting base 2, and the mounting base 2 is provided with a pouring hole 3 corresponding to the column pouring port, and a pouring pipe 4 is inserted through the pouring hole 3; the mounting base 2 can be sleeved or clamped on the outside of the steel pipe body 1 using a clamping structure, so that the pouring hole 3 is aligned with the column pouring port, so that the pouring pipe 4 can communicate with the inside of the steel pipe body 1. One end of the pouring pipe 4 is connected to a control valve 5, and the other end has multiple pouring ports 21 on its side wall. The pouring ports 21 are used to introduce concrete into the steel pipe body 1 during the pouring process. The edges of the pouring ports 21 can form rounded transition surfaces or outwardly expanding guide surfaces. Multiple pouring ports 21 are arranged at intervals along the circumference of the pouring pipe 4. The minimum opening size of the pouring ports 21 is matched with the maximum aggregate particle size of the poured concrete to reduce the probability of aggregate getting stuck at the pouring ports 21.

[0023] like Figures 3 to 5 As shown, the control valve 5 includes a valve body with a valve cavity and a valve cavity outlet communicating with the pouring pipe 4. The control valve 5 is connected to the concrete pumping pipe 6 and the flushing pumping pipe 7 respectively, forming a concrete inlet and a flushing inlet respectively. The concrete pumping pipe 6 can be connected to an external concrete delivery pump for conveying concrete to the pouring pipe 4. The flushing pumping pipe 7 can be connected to an external flushing pump for conveying flushing medium to the pouring pipe 4 when flushing or cleaning is required. The flushing medium can be clean water. The control valve 5 is equipped with a rotating shaft 9 and a sealing plate 12; the rotating shaft 9 is equipped with an operating handle 10 and a drive block 11; the sealing plate 12 is located in the valve cavity and fixed on the rotating shaft 9, and the sealing plate 12 can rotate with the rotating shaft 9 between the pouring passage opening position and the flushing passage opening position. Valve seat sealing rings are installed at the concrete inlet and flushing inlet respectively. When the sealing plate 12 rotates to the corresponding position, it is pressed against the corresponding valve seat sealing ring to seal the corresponding inlet. When the sealing plate 12 seals the flushing pump pipe 7, the concrete pump pipe 6 is connected to the pouring pipe 4 through the valve cavity and the valve cavity outlet. When the sealing plate 12 seals the concrete pump pipe 6, the flushing pump pipe 7 is connected to the pouring pipe 4 through the valve cavity and the valve cavity outlet. When the sealing plate 12 switches between the two working positions, the operator does not start the concrete delivery pump or the flushing pump. Pumping is only started after the drive block 11 reaches the corresponding limit position to avoid cross-flow between the concrete pump pipe 6 and the flushing pump pipe 7 in the intermediate transition state. Valve seat sealing rings are installed at the ports of the concrete pump pipe 6 and the flushing pump pipe 7 of the sealing plate 12 to improve the sealing effect of the sealing plate 12 on the corresponding ports and reduce the probability of cross-flow leakage between the pouring state and the flushing state.

[0024] like Figure 4 and Figure 5As shown, a closed tube 17 is slidably installed inside the pouring pipe 4; the closed tube 17 moves synchronously with the driving block 11 through a limiting plate 16, a moving plate 15, a rotating rod 14, and a driving arm 13; one end of the driving arm 13 is connected to the driving block 11, and the other end is connected to the moving plate 15 through the rotating rod 14. The moving plate 15 is connected to the limiting plate 16, and the limiting plate 16 is connected to the closed tube 17. At least one annular sealing ring can be provided on the outer periphery of the closed tube 17 to maintain a seal when the closed tube 17 slides relative to the pouring pipe 4; when the construction personnel turn the operating handle 10, the rotating shaft 9 drives the driving block 11 to rotate, and the driving block 11 drives the moving plate 15 and the limiting plate 16 to move through the driving arm 13. At the same time as the limiting plate 16 moves, it drives the closed tube 17 to slide relative to the pouring pipe 4. The drive block 11 has two limiting positions, corresponding to the pouring open position and the flushing closed position respectively. In the pouring open position, the connecting groove 18 on the closed pipe 17 coincides with the pouring port 21. In the flushing closed position, the pipe wall of the closed pipe 17 completely covers the pouring port 21. The axial travel of the closed pipe 17 is not less than the sum of the maximum dimension of the pouring port 21 along the sliding direction of the closed pipe 17 and the sealing margin, so as to ensure that the closed pipe 17 can move from the state where the connecting groove 18 is aligned with the pouring port 21 to the state where the pipe wall completely covers the pouring port 21. At least two sets of annular sealing rings are provided on the outer periphery of the closed pipe 17; in the flushing state, at least two sets of annular sealing rings are located on both sides of the axial direction of the pouring port 21, so that the closed pipe 17 and the inner wall of the pouring pipe 4 form an axial double-sided seal on the pouring port 21, restricting the flushing medium from entering the pouring port 21 from the gap between the closed pipe 17 and the pouring pipe 4; a sealing element is provided between the limiting plate 16 and the groove at the top of the pouring pipe 4 to reduce the possibility of slurry leakage from the joint between the limiting plate 16 and the pouring pipe 4 during the pouring or flushing process; One end of the closed pipe 17 is provided with multiple sets of connecting grooves 18, which are adapted to the pouring port 21. When the control valve 5 is in the pouring state, the sealing plate 12 blocks the flushing pump pipe 7 and connects the concrete pump pipe 6 with the pouring pipe 4. At the same time, the closed pipe 17 moves to the position corresponding to the connecting groove 18 and the pouring port 21, so that the concrete can enter the interior of the steel pipe body 1 through the connecting groove 18 and the pouring port 21. When the control valve 5 is in the flushing state, the sealing plate 12 blocks the concrete pumping pipe 6 and connects the flushing pumping pipe 7 with the pouring pipe 4. At the same time, the sealing pipe 17 moves to the position where the connecting groove 18 is misaligned with the pouring port 21. The pipe wall of the sealing pipe 17 blocks the pouring port 21 to prevent the flushing medium from entering the interior of the steel pipe body 1.

[0025] like Figure 5As shown, a through-hole 19 is provided at the bottom of the pouring pipe 4, which is connected to the recovery pipe 20. The recovery pipe 20 can receive a collection bucket, sedimentation tank, or other collection structure. A recovery valve is provided on the recovery pipe 20. In the pouring state, the recovery valve is closed to prevent concrete from entering the recovery pipe 20 through the through-hole 19. In the flushing state, the recovery valve is open to allow the flushing medium to enter the recovery pipe 20 through the through-hole 19. The through-hole 19 is located outside the axial sliding stroke range of the closed pipe 17 and is located on the side of the pouring port 21 near the control valve 5. Therefore, the closed pipe 17 will not block the through-hole 19 when moving between the pouring open position and the flushing closed position. When the control valve 5 is in the flushing state, the closed pipe 17 blocks the pouring port 21, while the through-hole 19 is still connected to the inner cavity of the pouring pipe 4. The flushing pump pipe 7, control valve 5, pouring pipe 4, through-hole 19, and recovery pipe 20 form a flushing and recovery passage. The flushing medium carries the residue in the pouring pipe 4 and is discharged through the recovery pipe 20.

[0026] Example 2, as Figure 7 and Figure 8 As shown, based on Embodiment 1, a swirling guide plate 23, a mounting ring 24, and a guide cone 25 can also be installed inside the casting pipe 4. The swirling guide plate 23 is arranged in a spiral shape, and the guide cone 25 is installed inside the mounting ring 24. In order to avoid interference with the sliding movement of the closed pipe 17, the swirling guide plate 23, the mounting ring 24, and the guide cone 25 are all located outside the axial sliding stroke range of the closed pipe 17 and are located on the upstream side of the casting port 21. After entering the pouring pipe 4, the concrete first passes through the swirling guide plate 23 and the guide cone 25 located outside the travel area of ​​the closed pipe 17. Under the action of the swirling guide plate 23, a swirling trend is formed, and then it flows to the pouring port 21 after being dispersed by the guide cone 25. The guide cone 25 is provided with a flow channel 26, which is set at intervals along the outer periphery of the guide cone 25. The flow channel 26 is used to form a diversion channel for the concrete on the outer periphery of the guide cone 25, reducing the probability of concrete accumulating and blocking at the installation ring 24.

[0027] like Figure 6 and Figure 9 As shown, a pressure detector 22 is installed on the casting pipe 4; the pressure detector 22 is used to detect the pressure inside the casting pipe 4; a mounting ring 28 is installed on the top of the steel pipe body 1, and an exhaust pipe 27 connected to the exhaust hole is installed on the mounting ring 28; a limit ring 29 is installed on the inner wall of the exhaust pipe 27, and a moving rod 30 is slidably installed inside the limit ring 29; a float bladder 31 is installed at one end of the moving rod 30, and an indicator head 32 is installed at the other end; a sealing ring 33 is installed between the moving rod 30 and the limit ring 29. An exhaust bypass space is formed inside the exhaust stack 27, and an exhaust flow gap is left between the float bladder 31 and the inner wall of the exhaust stack 27, so that the gas inside the steel pipe body 1 can enter the exhaust stack 27 through the exhaust hole and be discharged from the upper part of the exhaust stack 27 or the discharge pipe 34; the float bladder 31 can be made of a smooth, slurry-resistant material, or the outer surface can be formed with an arc-shaped guide structure to reduce the risk of being stuck by mortar; the inlet of the discharge pipe 34 is set so that when the slurry reaches the exhaust stack 27, it first contacts the float bladder 31 and pushes the moving rod 30 and the indicator head 32 to move, and then is discharged from the discharge pipe 34; preferably, the float bladder 31 is located below the inlet of the discharge pipe 34 or in the guide cavity corresponding to the inlet of the discharge pipe 34; During the pouring process, construction personnel can judge the pouring status by combining the position change of the indicator head 32 and the pressure detection value of the pressure detector 22. When the indicator head 32 shows that the concrete has reached the top, the concrete pumping should be stopped and the blockage should be carried out. When the pressure detector 22 detects that the pressure detection value exceeds the preset pressure threshold or the pressure rise rate exceeds the preset change rate and continues for a preset time, and the indicator head 32 does not show that the concrete has reached the top, this situation serves as an auxiliary judgment condition for the risk of residual slurry blockage in the pouring pipe 4 or control valve 5. Construction personnel can stop or reduce the concrete pumping and then check or flush, without directly equating the abnormal pressure rise with the internal blockage of the steel pipe body 1.

[0028] Through the above structure, this application enables the switching of the control valve 5, the opening and closing of the pouring port 21 by the closed pipe 17, and the external discharge and recycling of the flushing medium to form a synchronous linkage, which avoids the problem of the flushing medium entering the steel pipe body 1 and affecting the concrete quality, and improves the convenience of cleaning and reuse of the pouring device.

[0029] This application also provides a pouring construction method for steel-concrete composite columns, comprising the following steps: S1. Install the mounting base 2 at the bottom of the steel pipe body 1, so that the pouring hole 3 on the mounting base 2 corresponds to the column pouring port at the bottom of the steel pipe body 1, and make the pouring pipe 4 communicate with the inside of the steel pipe body 1 through the pouring hole 3. S2. Connect the concrete pumping pipe 6 to the concrete delivery pump, connect the recovery pipe 20 to the external collection structure, and connect the discharge pipe 34 to the external residual slurry collection structure, so that the recovery valve is in the closed state. S3. Rotate the operating handle 10 to put the control valve 5 into the pouring state; in the pouring state, the sealing plate 12 seals the flushing pump pipe 7, the concrete pump pipe 6 is connected to the pouring pipe 4, and the connecting groove 18 on the sealing pipe 17 is connected to the pouring port 21 on the pouring pipe 4. At the same time, the connecting groove 18 on the sealing pipe 17 is connected to the pouring port 21. S4. Start the concrete delivery pump so that the concrete enters the steel pipe body 1 through the concrete pumping pipe 6, control valve 5 and pouring pipe 4. When the concrete passes through the pouring pipe 4, it is guided by the swirl guide plate 23 and dispersed by the guide cone 25 before entering the steel pipe body 1 through the pouring port 21. S5. During the pouring process, the gas inside the steel pipe body 1 enters the exhaust cylinder 27 through the top exhaust hole and is discharged. When the concrete reaches the vicinity of the exhaust cylinder 27, the floating bladder 31 drives the moving rod 30 and the indicator head 32 to move to indicate the concrete arrival status. The residual slurry that enters the exhaust cylinder 27 is discharged through the discharge pipe 34. S6. Based on the position change of the indicator head 32, after the concrete reaches the top of the steel pipe body 1, stop the concrete delivery pump and seal the column pouring port and the top vent hole of the steel pipe body 1.

[0030] This application also provides a method for flushing and cleaning a pouring device used in the construction of steel-concrete composite columns, which specifically includes the following steps: S1. After pouring is completed, or when the construction personnel determine the risk of residual slurry blockage in the pouring pipe 4 or control valve 5 based on the pressure detection value of pressure detector 22, the operating resistance of operating handle 10, the pump stop time, and the state of residual slurry in the pouring pipe 4, the concrete pumping shall be stopped or reduced. Among them, the pressure detection value of pressure detector 22 exceeding the preset pressure threshold or the pressure rise rate exceeding the preset change rate and lasting for a preset time, and the indicator head 32 not showing that the concrete has reached the top, shall be used as an auxiliary condition for determining the risk of residual slurry blockage in the pouring pipe 4 or control valve 5. S2. Open the recovery valve, connect the flushing pump pipe 7 to the flushing pump, connect the recovery pipe 20 to the external collection structure, and depressurize the casting pipe 4 through the recovery pipe 20. S3. Rotate the operating handle 10 to switch the control valve 5 from the pouring state to the flushing state. In the flushing state, the sealing plate 12 blocks the concrete pumping pipe 6, and the flushing pumping pipe 7 is connected to the pouring pipe 4. At the same time, the driving block 11 drives the closed pipe 17 to move through the driving arm 13, the rotating rod 14, the moving plate 15 and the limiting plate 16, so that the connecting groove 18 is misaligned with the pouring port 21, and the pipe wall of the closed pipe 17 blocks the pouring port 21. S4. Start the flushing pump so that the flushing medium enters the pouring pipe 4 through the flushing pump delivery pipe 7 and control valve 5. S5. Because the pouring port 21 is blocked by the closed pipe 17, the flushing medium cannot enter the steel pipe body 1 through the pouring port 21. Instead, it carries the residue in the pouring pipe 4 and discharges into the external collection structure through the through port 19 and the recovery pipe 20. S6. After flushing is completed, turn off the flushing pump; before the column pouring port of the steel pipe body 1 is sealed or the device is removed, keep the control valve 5 in the flushing state so that the closed pipe 17 continuously blocks the pouring port 21.

[0031] This application enables the switching of the control valve 5, the opening and closing of the pouring port 21 by the closed pipe 17, and the external discharge and recycling of the flushing medium to form a synchronous linkage, which avoids the problem of the flushing medium entering the steel pipe body 1 and affecting the concrete quality, and improves the convenience of cleaning and reuse of the pouring device.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pouring device for constructing steel-concrete composite columns, comprising a steel pipe body (1), wherein the bottom of the steel pipe body (1) is provided with a column pouring port and the top is provided with a vent hole, characterized in that: The bottom of the steel pipe body (1) is provided with an installation seat (2), and the installation seat (2) is provided with a pouring hole (3) corresponding to the column pouring port. A pouring pipe (4) is provided through the pouring hole (3). One end of the pouring pipe (4) is connected to a control valve (5), and the other end of the side wall is provided with a pouring port (21). The control valve (5) is connected to the concrete pumping pipe (6) and the flushing pumping pipe (7) respectively. The control valve (5) is provided with a rotating shaft (9) and a sealing plate (12) that rotates with the rotating shaft (9). A drive block (11) is provided on the rotating shaft (9). A closed tube (17) is slidably disposed inside the casting pipe (4). The closed tube (17) is connected to the drive block (11) and can slide relative to the casting pipe (4) with the movement of the drive block (11). The outer wall of the closed tube (17) is slidably sealed with the inner wall of the casting pipe (4). A recovery tube (20) communicating with its inner cavity is disposed on the casting pipe (4). The control valve (5) has a pouring state and a flushing state; in the pouring state, the sealing plate (12) connects the concrete pumping pipe (6) with the pouring pipe (4), and the sealing pipe (17) opens the pouring port (21). In the flushing state, the sealing plate (12) connects the flushing pump pipe (7) with the pouring pipe (4), and the driving block (11) moves the sealing pipe (17) to the position of blocking the pouring port (21) to prevent the flushing medium from entering the steel pipe body (1) through the pouring port (21) and to discharge the flushing medium through the recovery pipe (20).

2. The pouring device for constructing steel-concrete composite columns according to claim 1, characterized in that: An operating handle (10) is provided on the rotating shaft (9). A valve seat sealing ring is provided at the port where the concrete pumping pipe (6) and the flushing pumping pipe (7) communicate with the valve cavity of the control valve (5). When the sealing plate (12) rotates to the corresponding position, it presses against the corresponding valve seat sealing ring to selectively seal the concrete pumping pipe (6) or the flushing pumping pipe (7).

3. A pouring device for constructing steel-concrete composite columns according to claim 2, characterized in that: The closed tube (17) moves synchronously with the drive block (11) through the limiting plate (16), the moving plate (15), the rotating rod (14) and the drive arm (13); One end of the drive arm (13) is connected to the drive block (11), and the other end is connected to the moving plate (15) via the rotating rod (14). The moving plate (15) is connected to the limiting plate (16), and the limiting plate (16) is connected to the closed tube (17).

4. A pouring device for constructing steel-concrete composite columns according to claim 3, characterized in that: One end of the closed pipe (17) is provided with multiple sets of connecting grooves (18), which are adapted to the pouring port (21); when the control valve (5) is in the pouring state, the connecting groove (18) is connected to the pouring port (21) so that the concrete can enter the steel pipe body (1) through the pouring port (21). When the control valve (5) is in the flushing state, the connecting groove (18) is misaligned with the pouring port (21), and the wall of the sealing pipe (17) blocks the pouring port (21).

5. A pouring device for constructing steel-concrete composite columns according to claim 4, characterized in that: The recovery pipe (20) is connected to the casting pipe (4) through the through port (19), and a recovery valve is provided on the recovery pipe (20). When the control valve (5) is in the flushing state, the through port (19) is still connected to the inner cavity of the casting pipe (4) so ​​that the flushing pump pipe (7), control valve (5), casting pipe (4), through port (19) and recovery pipe (20) form a flushing and recovery passage.

6. A pouring device for constructing steel-concrete composite columns according to claim 1, characterized in that: At least two sets of annular sealing rings are provided on the outer periphery of the closed tube (17), and the annular sealing rings slide against the inner wall of the pouring tube (4); when the control valve (5) is in the flushing state, at least two sets of annular sealing rings are located on both sides of the axial direction of the pouring port (21) to restrict the flushing medium from entering the pouring port (21) from the gap between the closed tube (17) and the pouring tube (4).

7. A pouring device for constructing steel-concrete composite columns according to claim 5, characterized in that: A limiting ring (8) is provided on the concrete pumping pipe (6), and the rotating shaft (9) passes through the limiting ring (8). A limiting part is provided on the limiting ring (8), and the limiting part forms a limiting area for limiting the rotation range of the driving block (11). The limiting area includes a pouring limiting and a flushing limiting. When the driving block (11) is in the pouring limiting position, the sealing plate (12) is in the pouring passage conduction position and the connecting groove (18) is correspondingly connected to the pouring port (21). When the driving block (11) is in the flushing limiting position, the sealing plate (12) is in the flushing passage conduction position and the pipe wall of the sealing pipe (17) blocks the pouring port (21).

8. A pouring device for constructing steel-concrete composite columns according to claim 1, characterized in that: A swirling guide plate (23) is provided on the inner wall of the end of the pouring pipe (4) near the pouring port (21). The swirling guide plate (23) is arranged in a spiral shape. An installation ring (24) is provided on the inner wall of the pouring pipe (4). A guide cone (25) is provided on the inner wall of the installation ring (24). The guide cone (25) is used to disperse the concrete after being guided by the swirling guide plate (23) to the pouring port (21). A flow groove (26) is provided on the guide cone (25). The flow groove (26) is arranged at intervals along the outer periphery of the guide cone (25).

9. A pouring device for constructing steel-concrete composite columns according to claim 5, characterized in that: The top of the steel pipe body (1) is provided with an installation fixing ring (28), and an exhaust pipe (27) communicating with the exhaust hole is provided on the installation fixing ring (28). A limit ring (29) is provided on the inner wall of the exhaust pipe (27). A moving rod (30) is slidably provided inside the limit ring (29). A float (31) is provided at one end of the moving rod (30), and an indicator head (32) is provided at the other end. A sealing ring (33) is provided between the moving rod (30) and the limit ring (29). The exhaust pipe (27) is provided with a discharge pipe (34), which is used to discharge the residual slurry that enters the exhaust pipe (27). The casting pipe (4) is provided with a pressure detector (22).

10. A pouring construction method for concrete-filled steel tube columns, characterized in that, The pouring device for constructing steel-concrete composite columns according to claim 8 includes the following steps: S1. Install the mounting base (2) at the bottom of the steel pipe body (1), so that the pouring hole (3) on the mounting base (2) corresponds to the column pouring port at the bottom of the steel pipe body (1), and make the pouring pipe (4) communicate with the inside of the steel pipe body (1) through the pouring hole (3). S2. Connect the concrete pumping pipe (6) to the concrete conveying pump, connect the recovery pipe (20) to the external collection structure, and connect the discharge pipe (34) to the external residual slurry collection structure, so that the recovery valve is in the closed state. S3. Rotate the operating handle (10) to put the control valve (5) into the pouring state; in the pouring state, the sealing plate (12) seals the flushing pump pipe (7), the concrete pump pipe (6) is connected to the pouring pipe (4), and the connecting groove (18) on the sealing pipe (17) is connected to the pouring port (21) on the pouring pipe (4). At the same time, the connecting groove (18) on the sealing pipe (17) is connected to the pouring port (21). S4. Start the concrete pump to allow the concrete to enter the steel pipe body (1) through the concrete pumping pipe (6), control valve (5) and pouring pipe (4); when the concrete passes through the pouring pipe (4), it is guided by the swirl guide plate (23) and dispersed by the guide cone (25), and then enters the steel pipe body (1) through the pouring port (21). S5. During the pouring process, the gas inside the steel pipe body (1) enters the exhaust cylinder (27) through the top exhaust hole and is discharged. When the concrete reaches the vicinity of the exhaust cylinder (27), the floating bladder (31) drives the moving rod (30) and the indicator head (32) to move to show the concrete arrival status. The residual slurry that enters the exhaust cylinder (27) is discharged through the discharge pipe (34). S6. Based on the position change of the indicator head (32), after the concrete reaches the top of the steel pipe body (1), stop the concrete delivery pump and seal the column pouring port and the top vent hole of the steel pipe body (1).

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