Concrete filled steel tube pouring exhaust device and construction method thereof

Abstract

The application relates to the technical field of concrete pouring, and discloses a steel pipe concrete pouring exhaust device and a construction method thereof. The device comprises a steel pipe body, a pouring opening, a fixing hoop, a communicating pipe, an exhaust box, a floating sealing assembly, a cleaning assembly and an indicating assembly. The communicating pipe is installed at an exhaust hole on one side of the top of the steel pipe body through the fixing hoop. The floating sealing assembly comprises a fixing ring, a return spring, a moving head and a sealing head. In the exhaust stage, gas enters the exhaust box through the communicating pipe and a flow hole and is exhausted through an exhaust pipe. After the slurry reaches, the moving head is pushed to move, so that the sealing head seals the flow hole. The cleaning assembly drives a cleaning plate and a scraping plate to clean the communicating pipe, the fixing ring and the vicinity of the flow hole through a rotating rod. The indicating assembly displays the exhaust completion state through a pushing head, a moving rod and an indicating rod. The device can realize exhaust, automatic sealing, anti-blocking cleaning, gas-slurry separation and exhaust completion indication, and improves the steel pipe concrete pouring quality.

Description

Technical Field

[0001] This application relates to the field of concrete pouring technology, and in particular to a steel pipe concrete pouring exhaust device and its construction method. Background Technology

[0002] Concrete-tube steel structures are composite structures formed by pouring concrete inside steel tubes. They combine the confinement of steel tubes with the compressive strength of concrete and are widely used in building columns, bridge support components, and large-span load-bearing structures. During the construction of concrete-tube steel structures, concrete is usually pumped into the steel tube through the injection port at the bottom or side of the steel tube. The concrete gradually fills the internal space of the steel tube from bottom to top. As the concrete level rises, the air inside the steel tube needs to be expelled in time. Otherwise, air bubbles, cavities, or locally loose areas can easily form inside the steel tube, affecting the forming quality and load-bearing capacity of the concrete-tube steel structure.

[0003] In existing construction methods, vent holes are typically installed at or near the top of the steel pipe to allow internal gas to escape during concrete pouring. When the concrete slurry rises to the vent hole, workers often judge whether the pipe is essentially full by observing whether slurry overflows from it. However, this method has several drawbacks: First, the vent hole is easily blocked by cement slurry, mortar, or fine aggregate, preventing timely gas escape. Second, when concrete slurry overflows from the vent hole, it can contaminate the outer wall of the steel pipe and the construction site, resulting in slurry waste. Third, closing the vent hole usually relies on manual observation and intervention; if not handled promptly, slurry can continue to flow out, while premature intervention may result in incomplete air removal from the pipe. Therefore, this application provides a steel pipe concrete pouring venting device and its construction method that enables stable venting, automatic sealing upon slurry arrival, gas-slurry separation, and anti-blocking cleaning during the steel pipe concrete pouring process. Summary of the Invention

[0004] This application proposes a venting device and construction method for steel pipe concrete pouring, which has the advantages of stable venting, automatic sealing after grout arrival, air-grout separation, and anti-clogging cleaning. It solves the problems of existing steel pipe concrete pouring where the venting hole is easily blocked by cement grout, mortar, or fine aggregate, resulting in the inability of gas inside the steel pipe to be discharged in time; secondly, when concrete grout overflows from the venting hole, it easily contaminates the outer wall of the steel pipe and the construction site, and causes grout waste.

[0005] To achieve the above objectives, this application adopts the following technical solution: A steel pipe concrete pouring venting device is suitable for installation on a steel pipe body with vent holes, comprising a fixing hoop, a connecting pipe, a discharge box, a floating sealing assembly, and an indicator assembly; the fixing hoop is used to be sleeved and fixed to the outside of the steel pipe body, the connecting pipe is disposed on the fixing hoop and used to communicate with the vent holes, the discharge box is connected to the connecting pipe, and the discharge box is provided with an vent pipe; The floating sealing assembly is disposed inside the connecting pipe and includes a fixed ring, a return spring, a moving head and a sealing head. The fixed ring has an overflow hole, the return spring is connected between the fixed ring and the moving head, and the sealing head is disposed on the side of the moving head close to the fixed ring and corresponds to the overflow hole. The indicating component includes an indicating tube connected to the connecting tube and having an observation window, a push head located inside the connecting tube, a moving rod connected to the push head, and an indicating rod that moves with the moving rod. During the exhaust phase, the return spring keeps the sealing head separated from the flow hole, and the gas enters the exhaust box through the connecting pipe and the flow hole and is discharged through the exhaust pipe. After the concrete slurry enters the connecting pipe, it pushes the moving head to seal the flow hole, and pushes the moving head to move the indicator rod to change position at the observation window via the moving rod.

[0006] Furthermore, the fixing ring is a detachable ring structure, which includes two mutually cooperating semi-rings. The ends of the two semi-rings are connected by fasteners. The connecting pipe is fixedly installed on one of the semi-rings, and the axis of the connecting pipe is aligned with the center line of the exhaust port.

[0007] Furthermore, a sealing gasket is provided at one end of the connecting pipe that communicates with the vent hole. The sealing gasket is sandwiched between the fixing ring and the outer wall of the steel pipe body and surrounds the outer periphery of the vent hole.

[0008] Furthermore, the elastic force of the reset spring is greater than the airflow disturbance force acting on the moving head during the gas discharge stage, and less than the thrust acting on the moving head after the concrete slurry reaches the connecting pipe.

[0009] Furthermore, the fixed ring forms a rounded transition surface around the flow hole on the side facing the moving head. The rounded transition surface is used to reduce the abrupt change in step between the fixed ring and the inner wall of the connecting pipe. The moving head forms a shielding surface on the side facing the reset spring. The shielding surface is used to shield the slurry-facing side of the reset spring when the concrete slurry pushes the moving head.

[0010] Furthermore, the bottom of the moving head is provided with a fitting block, which has a semi-circular structure and the outer arc surface of the fitting block is in contact with the inner wall of the connecting pipe; the moving head is provided with a limiting block and the fixed ring is provided with a limiting groove. When the moving head moves toward the fixed ring, the limiting block enters or abuts the limiting groove to limit the circumferential displacement of the moving head relative to the fixed ring.

[0011] Furthermore, the fixed ring forms an annular valve seat around the flow hole on the side facing the moving head, and the sealing head is an elastic sealing head used to press against the annular valve seat to form a first seal; the moving head is provided with a bonding plate, the fixed ring is provided with a bonding groove, and the bonding plate and the bonding groove are bonded together to form a second slurry-blocking structure.

[0012] Furthermore, a discharge pipe is provided at the bottom of the discharge box, and a guide plate is provided inside the discharge box. The guide plate is bent towards the discharge pipe to guide the concrete slurry entering the discharge box to the discharge pipe and to allow the gas entering the discharge box to rise into the exhaust pipe.

[0013] Furthermore, a cleaning assembly is also provided inside the connecting pipe. The cleaning assembly includes a rotating rod that passes through the discharge box, a connecting plate at one end of the rotating rod, a cleaning plate at one end of the connecting plate, and a scraping plate at one end of the cleaning plate. The rotating rod has a threaded groove, and the discharge box has a threaded mating part that mates with the threaded groove. One end of the scraping plate has an arc-shaped head, the outer arc surface of which is adapted to the inner arc surface of the connecting pipe. The scraping plate rotates in both directions (positive and negative degrees) based on its horizontal posture when it is located at the central axis of the connecting pipe, in order to cover the periphery of the flow hole and the lower half of the inner wall of the connecting pipe, while avoiding the moving head and the return spring.

[0014] A method for venting concrete pouring using steel pipes includes the following steps: S. Fix the fixing ring to the outside of the steel pipe body so that the connecting pipe is connected to the exhaust hole of the steel pipe body; S. Concrete is poured into the steel pipe body so that the gas inside the steel pipe body enters the discharge box through the connecting pipe and the flow hole, and is discharged through the exhaust pipe. S. When the concrete slurry enters the connecting pipe, the concrete slurry pushes the moving head toward the fixed ring, causing the sealing head to block the flow hole; S. The concrete slurry pushes the push head to move, causing the push head to move the indicator rod via the moving rod, so as to indicate the state of the concrete slurry. S. When slurry adheres to or blocks the connecting pipe, flow hole, or fixing ring, rotate the rotating rod to drive the cleaning plate and scraping plate to clean the inner wall of the fixing ring, flow hole, and connecting pipe.

[0015] The beneficial effects of this invention are as follows: This application provides a venting device and construction method for steel pipe concrete pouring. The venting device is installed at the vent hole of the steel pipe body using a fixing ring, a connecting pipe, and a sealing gasket. This allows gas inside the steel pipe to enter the connecting pipe through the vent hole, and then further into the discharge box before being discharged through the vent pipe. Compared to existing construction methods that directly vent gas through the vent hole and rely on manual observation of grout overflow, this application provides centralized guidance of the venting path, reducing disorderly grout leakage at the vent hole and grout contamination of the steel pipe's outer wall and the construction site. Furthermore, the fixing ring installation method facilitates the installation of the venting device before pouring and its removal and cleaning after pouring, promoting reuse.

[0016] This application provides a venting device and construction method for steel pipe concrete pouring, which forms a floating sealing structure through a fixed ring, a flow hole, a return spring, a moving head, and a sealing head. During the venting stage, the return spring keeps the sealing head separated from the flow hole, allowing gas inside the steel pipe to escape smoothly. When the concrete slurry rises to the vent hole and enters the connecting pipe, the slurry pushes the moving head towards the fixed ring, causing the sealing head to seal the flow hole. Therefore, compared to the existing technology that relies on construction personnel to observe slurry overflow and then manually seal the vent hole, this application utilizes the slurry's arrival to trigger the sealing action, reducing the risk of continuous slurry overflow due to untimely sealing and also reducing the risk of incomplete air removal inside the steel pipe due to premature sealing.

[0017] This application provides a steel-pipe concrete pouring venting device and its construction method. The device forms a gas-slurry separation structure through a venting box, venting pipe, discharge pipe, and guide plate, and a venting completion indication structure through an indicator pipe, observation window, push head, moving rod, and indicator rod. Gas entering the venting box can be discharged upwards, while a small amount of slurry can be discharged towards the discharge pipe under the action of the guide plate, thereby reducing the risk of slurry spraying out along the venting path with the airflow. Simultaneously, when the concrete slurry reaches the connecting pipe and pushes the push head, the position of the indicator rod changes, allowing construction personnel to judge the slurry's arrival status through the observation window. Therefore, this application reduces slurry overflow while providing a more intuitive venting completion indication, improving the timeliness and reliability of construction judgment.

[0018] This application provides a venting device and construction method for steel pipe concrete pouring. A cleaning structure is formed by a rotating rod, a cleaning plate, a scraping plate, and an arc-shaped head. When slurry adheres to or clogs near the connecting pipe, flow hole, or fixing ring, construction personnel can rotate the rotating rod to drive the cleaning plate and scraping plate to clean the key venting areas. Compared to existing methods that require work stoppage, disassembly, or manual external cleaning after vent blockage, this application can restore the venting channel's unobstructed flow without disassembling the venting device. Furthermore, the floating sealing structure, air-slurry separation structure, venting completion indicator structure, and cleaning structure are all designed around the same venting path, ensuring a continuous and coordinated relationship between venting, slurry reaching the sealing point, small amount of slurry separation, status indication, and blockage cleaning. This improves the venting stability, sealing reliability, and construction controllability during steel pipe concrete pouring. 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 1 This is a schematic diagram of the overall structure; Figure 2 This is a schematic diagram of the fixed hoop structure; Figure 3 This is a schematic diagram showing the installation positions of the connecting pipe and the discharge box. Figure 4 This is a schematic diagram of a partial cross-section of a connecting pipe; Figure 5 A schematic diagram of the installation structure of the moving head inside the connecting pipe; Figure 6 This is a schematic diagram of the fixed ring structure; Figure 7 This is a schematic diagram of the rotating rod structure; Figure 8 This is a schematic diagram of the installation structure of the rotating rod and the discharge box; Figure 9 This is a schematic diagram of the component structure; Figure 10 This is a schematic diagram showing the flow direction of gas and liquid in the connecting pipe and the discharge box; Figure 11 This is a schematic diagram of the moving head moving inside the connecting pipe.

[0020] In the diagram: 1-Steel pipe body, 2-Injection port, 3-Fixing ring, 4-Connecting pipe, 5-Discharge box, 6-Exhaust pipe, 7-Discharge pipe, 8-Fixing ring, 9-Reset spring, 10-Moving head, 11-Limiting block, 12-Sealing head, 13-Matching block, 14-Adhesive plate, 15-Adhesive groove, 16-Limiting groove, 17-Rotating rod, 18-Threaded groove, 19-Rotating head, 20-Connecting plate, 21-Cleaning plate, 22-Scraping plate, 23-Arc-shaped head, 24-Connecting port, 25-Indicator tube, 26-Observation window, 27-Closed cover plate, 28-Moving rod, 29-Limiting ring, 30-Indicator rod, 31-Telescopic rod, 32-Compression spring, 33-Push head, 34-Guide plate, 35-Sealing gasket, 36-Flow hole. 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 Figures 1 to 3 As shown, this embodiment provides a steel pipe concrete pouring venting device, including a steel pipe body 1 and a material inlet 2 opened on one side of the bottom of the steel pipe body 1; a venting hole is opened on one side of the top of the steel pipe body 1; a fixing ring 3 is sleeved on the outside of the steel pipe body 1, and a connecting pipe 4 is provided on the fixing ring 3, the connecting pipe 4 being positioned corresponding to the venting hole; a sealing gasket 35 is provided between the connecting pipe 4 and the venting hole, the sealing gasket 35 surrounding the outer periphery of the venting hole, so that a sealed communication structure is formed between the connecting pipe 4 and the venting hole; In this embodiment, the fixing ring 3 can be a detachable ring structure, which includes two mutually cooperating half-rings connected by fasteners; by adjusting the tightening degree of the fasteners, the fixing ring 3 can be stably fixed on the outer wall of the steel pipe body 1, and the connecting pipe 4 can be accurately aligned with the exhaust hole; the sealing gasket 35 can be made of rubber, silicone or other elastic sealing materials, used to compensate for the assembly gap between the fixing ring 3 and the outer wall of the steel pipe body 1.

[0023] like Figure 3 , Figure 4 and Figure 10 As shown, a discharge box 5 is provided at one end of the connecting pipe 4; an exhaust pipe 6 is provided at the top of the discharge box 5 and a discharge pipe 7 is provided at the bottom; the connecting pipe 4 is used to introduce the gas inside the steel pipe body 1 into the discharge box 5, the exhaust pipe 6 is used to discharge the gas, and the discharge pipe 7 is used to discharge a small amount of slurry that has entered the discharge box 5.

[0024] likeFigures 4 to 6 As shown, a floating sealing assembly is installed inside the connecting pipe 4; the floating sealing assembly includes a fixed ring 8, a return spring 9, and a moving head 10; the fixed ring 8 is located on the inner wall of the connecting pipe 4 away from the vent hole, and a flow hole 36 is formed on the fixed ring 8; the flow hole 36 is used to connect the connecting pipe 4 and the discharge box 5 during the venting stage, and the side of the fixed ring 8 facing the moving head 10 forms a rounded transition surface around the flow hole 36, which is used to reduce the step change between the fixed ring 8 and the inner wall of the connecting pipe 4, so that the gas, slurry and entrained fine particles can smoothly transition near the flow hole 36, reducing the probability of aggregate getting stuck around the flow hole 36, and allowing the gas inside the steel pipe body 1 to enter the discharge box 5 through the flow hole 36; the fixed ring 8 faces the moving head 10. A rounded transition surface is formed around the flow hole 36 on one side. This rounded transition surface is used to reduce the abrupt change in step between the fixed ring 8 and the inner wall of the connecting pipe 4, so that the gas, slurry and entrained fine particles can smoothly transition near the flow hole 36, reducing the probability of aggregate getting stuck around the flow hole 36. One end of the return spring 9 is connected to the fixed ring 8, and the other end is connected to the moving head 10. The moving head 10 can move relative to the fixed ring 8 along the axial direction of the connecting pipe 4. The side of the moving head 10 facing the return spring 9 forms a shielding surface. The shielding surface is used to shield the slurry-facing side of the return spring 9 when the concrete slurry pushes the moving head 10, so as to reduce the direct entry of slurry into the spring gap of the return spring 9. The elastic force of the return spring 9 is set to be greater than the force acting on the moving head 10 during the gas discharge stage. The airflow disturbance force is less than the thrust exerted on the moving head 10 by the concrete slurry after it reaches the connecting pipe 4, so that the moving head 10 keeps the sealing head 12 separated from the flow hole 36 during the venting stage, and can be pushed by the slurry to move towards the fixed ring 8 during the slurry arrival stage; the side of the moving head 10 facing the return spring 9 forms a shielding surface, which is used to shield the slurry-facing side of the return spring 9 when the concrete slurry pushes the moving head 10, so as to reduce the direct entry of slurry into the spring gap of the return spring 9. The elastic force of the return spring 9 is set to be greater than the airflow disturbance force exerted on the moving head 10 during the gas exhaust stage, and less than the thrust exerted on the moving head 10 by the concrete slurry after it reaches the connecting pipe 4, so that the moving head 10 keeps the sealing head 12 separated from the flow hole 36 during the venting stage. The moving head 10 is positioned so that it can be propelled towards the fixed ring 8 by the slurry during the slurry arrival stage. A sealing head 12 is provided on the side of the moving head 10 near the fixed ring 8, and the sealing head 12 is adapted to the flow hole 36. The sealing head 12 is made of rubber or elastic sealing material, and the diameter of the sealing head 12 is slightly larger than the diameter of the flow hole 36. When it is pressed against the flow hole 36, it can deform to form a better sealing effect. A fitting block 13 is provided at the bottom of the moving head 10. The fitting block 13 has a semi-circular structure, and the bottom of the moving head 10 and the outer arc surface of the fitting block 13 are in contact with the inner wall of the connecting pipe 4. The fitting block 13 can play a guiding role during the axial movement of the moving head 10, reducing the possibility of the moving head 10 tilting or deflecting in the connecting pipe 4. A limiting block 11 is provided at the top center of the moving head 10, and a limiting groove 16 is provided on the fixed ring 8. When the moving head 10 moves toward the fixed ring 8, the limiting block 11 can enter or abut against the limiting groove 16 to limit the circumferential offset between the moving head 10 and the fixed ring 8, so that the sealing head 12 can be accurately aligned with the flow hole 36. The bottom of the moving head 10 is also provided with a bonding plate 14, and the bottom of the fixing ring 8 is provided with a bonding groove 15. When the sealing head 12 blocks the flow hole 36, the side of the fixing ring 8 facing the moving head 10 forms an annular valve seat around the flow hole 36. After the moving head 10 is pushed by the slurry, the sealing head 12 presses against the annular valve seat to form a first seal on the flow hole 36. The bonding plate 14 and the bonding groove 15 are bonded together to form a second slurry-blocking structure, which is used to restrict the slurry from continuing to enter the discharge box 5 along the gap between the moving head 10 and the fixing ring 8. The side of the fixing ring 8 facing the moving head 10... An annular valve seat is formed around the flow hole 36 on one side. After the moving head 10 is pushed by the slurry, the sealing head 12 presses against the annular valve seat to form a first seal for the flow hole 36. The bonding plate 14 and the bonding groove 15 are bonded together to form a second slurry blocking structure, which is used to limit the slurry from continuing to enter the discharge box 5 along the gap between the moving head 10 and the fixed ring 8. The bonding plate 14 and the bonding groove 15 are bonded together to improve the sealing stability between the moving head 10 and the fixed ring 8 and reduce the risk of slurry continuing to enter the discharge box 5 from the gap between the moving head 10 and the fixed ring 8. During the venting stage, the air inside the steel pipe body 1 enters the connecting pipe 4 through the vent hole, and then enters the discharge box 5 through the flow hole 36 on the fixed ring 8, and is then discharged outward through the vent pipe 6. Since the main flow inside the connecting pipe 4 is gas, the moving head 10 is kept separated from the flow hole 36 under the action of the return spring 9, so that the gas can pass smoothly through the flow hole 36. When the concrete inside the steel pipe body 1 gradually rises to the position of the vent hole, the concrete slurry enters the connecting pipe 4. When the slurry acts on the moving head 10, it can push the moving head 10 towards the fixed ring 8, so that the sealing head 12 is pressed against and seals the flow hole 36. At this time, the flow of slurry between the connecting pipe 4 and the discharge box 5 is blocked, thereby preventing a large amount of concrete slurry from continuing to enter the discharge box 5 and overflowing.

[0025] like Figure 7 and Figure 8As shown, a cleaning assembly is also provided inside the connecting pipe 4; the cleaning assembly includes a rotating rod 17, a threaded groove 18, a rotating head 19, a connecting plate 20, a cleaning plate 21, a scraping plate 22, and an arc-shaped head 23; the rotating rod 17 is installed through the discharge box 5, and a sealing sleeve is provided at the position where the rotating rod 17 passes through the discharge box 5. The sealing sleeve is fitted around the outer periphery of the rotating rod 17 and is used to seal the discharge box 5 when the rotating rod 17 rotates and moves axially, reducing the risk of slurry leakage along the position where the rotating rod 17 passes through the discharge box 5. One end of the rotating rod 17 is connected to the connecting plate 20, and a cleaning plate 21 is provided at one end of the connecting plate 20. A scraping plate 22 is provided at one end of the cleaning plate 21; the cleaning plate 21 is fitted against the inner wall of the fixing ring 8, and the scraping plate 22 extends into the connecting pipe 4; A rotating head 19 is provided at the end of the rotating rod 17 away from the connecting plate 20. A threaded groove 18 is provided on the rotating rod 17, and a threaded mating part that mates with the threaded groove 18 is provided on the discharge box 5. When the construction worker rotates the rotating head 19, the rotating rod 17 rotates relative to the discharge box 5 and moves axially under the action of the threaded groove 18 and the threaded mating part. The rotating rod 17 drives the connecting plate 20, the cleaning plate 21, and the scraping plate 22 to move synchronously, thereby cleaning the slurry deposits on the fixing ring 8, the vicinity of the flow hole 36, and the inner wall of the connecting pipe 4. The scraping plate 22 is equipped with an arc-shaped head 23 at one end, and the outer arc surface of the arc head 23 is adapted to the inner arc surface of the connecting pipe 4. When the scraping plate 22 is located at the central axis of the connecting pipe 4, the scraping plate 22 can rotate in both directions within the connecting pipe 4. The rotation angle range is preferably 45° in both directions relative to the horizontal position. The 45° rotation range is used to cover the periphery of the flow hole 36 and the lower half of the attachment area of ​​the inner wall of the connecting pipe 4, while avoiding interference between the scraping plate 22 and the moving head 10, the return spring 9, or the fixing ring 8. With this structure, the cleaning assembly can mechanically clean the inside of the connecting pipe 4 and the vicinity of the flow hole 36 without disassembling the exhaust device, reducing the risk of blockage. The 45° rotation range in both directions is used to allow the scraper 22 to cover the periphery of the flow hole 36 and the lower half of the inner wall of the connecting pipe 4, while avoiding interference between the scraper 22 and the moving head 10, the return spring 9, or the fixing ring 8. With this structure, the cleaning assembly can mechanically clean the inside of the connecting pipe 4 and the vicinity of the flow hole 36 without disassembling the exhaust device, reducing the risk of blockage.

[0026] like Figure 9 As shown, an indicator assembly is provided at the top of the connecting pipe 4; a connecting port 24 is provided on the connecting pipe 4, and the indicator assembly includes an indicator pipe 25, an observation window 26, a closing cover plate 27, a moving rod 28, a limiting ring 29, an indicator rod 30, a telescopic rod 31, a compression spring 32, and a push head 33; An indicator tube 25 is located inside the connecting port 24 and connected to the connecting pipe 4. An observation window 26 is located in the middle of the indicator tube 25, and a sealing cover plate 27 is located at the top of the indicator tube 25. A moving rod 28 slides through the sealing cover plate 27. A sealing scraper ring is provided at the position where the moving rod 28 passes through the sealing cover plate 27. The sealing scraper ring is attached to the outer periphery of the moving rod 28 to prevent grout from overflowing through the gap between the moving rod 28 and the sealing cover plate 27 when the moving rod 28 moves up and down. A push head 33 is located at the bottom of the moving rod 28, and an indicator rod 30 is located at the top of the moving rod 28. A sealing scraper ring is provided at the position where the moving rod 28 passes through the sealing cover plate 27 to prevent grout from overflowing through the gap between the moving rod 28 and the sealing cover plate 27 when the moving rod 28 moves up and down. When concrete grout enters the connecting pipe 4 and acts on the push head 33, the push head 33 drives the moving rod 28 and the indicator rod 30 to move upward. A limiting ring is also provided. A limiting ring 29 is set on the moving rod 28 and located above the closing cover plate 27. The diameter of the limiting ring 29 is larger than the aperture of the closing cover plate 27 through which the moving rod 28 passes, so as to restrict the moving rod 28 from falling off the closing cover plate 27. A telescopic rod 31 is set between the closing cover plate 27 and the moving rod 28. A compression spring 32 is sleeved on the telescopic rod 31. The compression spring 32 is used to make the moving rod 28 tend to return to the direction of the connecting pipe 4. When the concrete slurry reaches the vicinity of the connecting port 24, the slurry directly acts on the push head 33 and pushes the moving rod 28 to move upward. A color-marked segment can be set on the indicator rod 30. The construction personnel can observe the position change of the color-marked segment through the observation window 26, thereby judging whether the concrete slurry has reached the connecting pipe 4, and thus judging the exhaust status. A color-marked segment can be set on the indicator rod 30. The construction personnel can observe the position change of the color-marked segment through the observation window 26, thereby judging whether the concrete slurry has reached the connecting pipe 4 more intuitively.

[0027] like Figure 10 As shown, a guide plate 34 is provided on one inner wall of the discharge box 5, and the guide plate 34 is bent towards the discharge pipe 7. When gas and a small amount of slurry enter the discharge box 5, the gas flows upward due to its lower density and is discharged through the exhaust pipe 6. The small amount of slurry flows downward under the guidance of the guide plate 34 and is discharged through the discharge pipe 7. The guide plate 34 can reduce the possibility of slurry spraying directly out of the exhaust pipe 6 with the gas, and realize the separation and discharge of gas and slurry. The small amount of concrete slurry that enters the discharge box 5 before the sealing head 12 is sealed, or the small amount of concrete slurry that enters the discharge box 5 with the gas, can flow to the discharge pipe 7 under the guidance of the guide plate 34, thereby preventing this part of the slurry from spraying directly out of the exhaust pipe 6 with the gas.

[0028] The construction process for this application is as follows: First, the fixing ring 3 is fitted onto the outside of the steel pipe body 1, aligning the connecting pipe 4 with the vent hole on the top side of the steel pipe body 1, and sealing the connecting pipe 4 with the vent hole using the sealing gasket 35. Then, concrete is poured into the steel pipe body 1 through the injection port 2 on the bottom side. As the concrete rises, the gas inside the steel pipe body 1 enters the connecting pipe 4 through the vent hole, then enters the discharge box 5 through the flow hole 36 on the fixing ring 8, and is discharged through the vent pipe 6. Simultaneously, concrete impurities mixed in with the gas enter the discharge box 5 along with the gas, and the mixed concrete can be discharged through the guide plate 34 and the discharge pipe 7. When the concrete slurry reaches the vent hole and enters the connecting pipe 4, the slurry pushes the moving head 10 towards the fixing ring 8, causing the sealing head 12 to block the flow hole 36. At the same time, the slurry entering the connecting pipe 4 pushes the pushing head 33 to move, which in turn moves the moving rod 28 and the indicator rod 30 upwards. Construction personnel can observe through the observation window 26. Observe the position change of the indicator rod 30 to determine the exhaust completion status; if slurry adheres or blocks near the connecting pipe 4, the flow hole 36, or the fixing ring 8 during the exhaust process, that is, the exhaust of the exhaust pipe 6 is not smooth, the construction personnel rotate the rotating head 19, so that the rotating rod 17 drives the cleaning plate 21 and the scraping plate 22 to scrape and clean the fixing ring 8, the flow hole 36, and the inner wall of the connecting pipe 4. The cleaning plate 21 scrapes off the slurry adhering to the periphery of the fixing ring 8 and the flow hole 36, and the scraping plate 22 scrapes off the slurry adhering to the inner wall of the connecting pipe 4; the scraped slurry enters the discharge box 5 under the push of the scraping plate 22, and flows to the discharge pipe 7 under the guidance of the guide plate 34, thereby restoring the smoothness of the exhaust channel. After the pouring is completed, the fixing ring 3 is removed from the steel pipe body 1. At the same time, the entire device can be rinsed with clean water to wash away the adhering concrete residue, so as to remove the adhering concrete residue and avoid the concrete solidification affecting the subsequent use of the device. After rinsing, the device can be reused.

[0029] 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 venting device for steel-concrete composite pouring, suitable for installation on a steel pipe body (1) with venting holes, characterized in that, It includes a fixing ring (3), a connecting pipe (4), a discharge box (5), a floating sealing assembly, and an indicator assembly; the fixing ring (3) is used to be sleeved and fixed on the outside of the steel pipe body (1), the connecting pipe (4) is set on the fixing ring (3) and is used to communicate with the exhaust hole, the discharge box (5) is connected to the connecting pipe (4), and the discharge box (5) is provided with an exhaust pipe (6); The floating sealing assembly is located inside the connecting pipe (4) and includes a fixed ring (8), a return spring (9), a moving head (10) and a sealing head (12). The fixed ring (8) has an overflow hole (36). The return spring (9) is connected between the fixed ring (8) and the moving head (10). The sealing head (12) is located on the side of the moving head (10) close to the fixed ring (8) and corresponds to the overflow hole (36). The indicator assembly includes an indicator tube (25) connected to the connecting tube (4) and provided with an observation window (26), a push head (33) located in the connecting tube (4), a moving rod (28) connected to the push head (33), and an indicator rod (30) that moves with the moving rod (28). During the exhaust phase, the return spring (9) keeps the sealing head (12) separated from the flow hole (36), and the gas enters the discharge box (5) through the connecting pipe (4) and the flow hole (36) and is discharged through the exhaust pipe (6); After the concrete slurry enters the connecting pipe (4), the moving head (10) is pushed to make the sealing head (12) block the flow hole (36), and the pushing head (33) is pushed to drive the indicator rod (30) to change position at the observation window (26) via the moving rod (28).

2. The exhaust device for steel pipe concrete pouring according to claim 1, characterized in that, The fixing ring (3) is a detachable ring structure. The fixing ring (3) includes two semi-ring bodies that cooperate with each other. The ends of the two semi-ring bodies are connected by fasteners. The connecting pipe (4) is fixedly installed on one of the semi-ring bodies, and the axis of the connecting pipe (4) is used to correspond to the center line of the exhaust hole.

3. The exhaust device for steel pipe concrete pouring according to claim 1, characterized in that, The end of the connecting pipe (4) that is connected to the exhaust hole is provided with a sealing gasket (35). The sealing gasket (35) is used to be sandwiched between the fixing ring (3) and the outer wall of the steel pipe body (1) and surrounds the outer periphery of the exhaust hole.

4. The exhaust device for steel pipe concrete pouring according to claim 3, characterized in that, The elastic force of the reset spring (9) is greater than the airflow disturbance force acting on the moving head (10) during the gas discharge stage, and less than the thrust acting on the moving head (10) after the concrete slurry reaches the connecting pipe (4).

5. The exhaust device for steel pipe concrete pouring according to claim 1, characterized in that, The fixed ring (8) forms a rounded transition surface around the flow hole (36) on the side facing the moving head (10). The rounded transition surface is used to reduce the step change between the fixed ring (8) and the inner wall of the connecting pipe (4). The moving head (10) forms a shielding surface on the side facing the reset spring (9). The shielding surface is used to shield the slurry-facing side of the reset spring (9) when the concrete slurry pushes the moving head (10).

6. The exhaust device for steel pipe concrete pouring according to claim 1, characterized in that, The bottom of the moving head (10) is provided with a fitting block (13), which has a semi-circular structure. The outer arc surface of the fitting block (13) is in contact with the inner wall of the connecting pipe (4). The moving head (10) is provided with a limiting block (11), and the fixed ring (8) is provided with a limiting groove (16). When the moving head (10) moves toward the fixed ring (8), the limiting block (11) enters or abuts the limiting groove (16) to limit the circumferential displacement of the moving head (10) relative to the fixed ring (8).

7. A steel pipe concrete pouring exhaust device according to claim 6, characterized in that, The fixed ring (8) forms an annular valve seat around the flow hole (36) on the side facing the moving head (10). The sealing head (12) is an elastic sealing head and is used to press against the annular valve seat to form a first seal. The moving head (10) is provided with a bonding plate (14), and the fixed ring (8) is provided with a bonding groove (15). The bonding plate (14) and the bonding groove (15) are bonded together to form a second slurry blocking structure.

8. The exhaust device for steel pipe concrete pouring according to claim 1, characterized in that, The bottom of the discharge box (5) is provided with a discharge pipe (7), and a guide plate (34) is provided inside the discharge box (5). The guide plate (34) is bent towards the discharge pipe (7) to guide the concrete slurry entering the discharge box (5) to the discharge pipe (7) and to allow the gas entering the discharge box (5) to enter the exhaust pipe (6) upward.

9. A steel-pipe concrete pouring exhaust device according to claim 1, characterized in that, The connecting pipe (4) is also equipped with a cleaning assembly, which includes a rotating rod (17) that runs through the discharge box (5), a connecting plate (20) at one end of the rotating rod (17), a cleaning plate (21) at one end of the connecting plate (20), and a scraping plate (22) at one end of the cleaning plate (21). The rotating rod (17) is provided with a threaded groove (18), and the discharge box (5) is provided with a threaded mating part that mates with the threaded groove (18). One end of the scraping plate (22) is provided with an arc-shaped head (23), and the outer arc surface of the arc-shaped head (23) is adapted to the inner arc surface of the connecting pipe (4). The scraping plate (22) rotates within a range of 45° in both directions, based on its horizontal posture when it is located at the central axis of the connecting pipe (4), in order to cover the periphery of the flow hole (36) and the lower half of the inner wall of the connecting pipe (4) and avoid the moving head (10) and the return spring (9).

10. A method for venting construction in steel-concrete composite pouring, characterized in that, The steel-concrete composite casting exhaust device according to claim 9 comprises the following steps: S1. The fixing ring (3) is fitted and fixed on the outside of the steel pipe body (1) so that the connecting pipe (4) is connected to the exhaust hole of the steel pipe body (1); S2. Concrete is poured into the steel pipe body (1) so that the gas in the steel pipe body (1) enters the discharge box (5) through the connecting pipe (4) and the flow hole (36) and is discharged through the exhaust pipe (6). S3. When the concrete slurry enters the connecting pipe (4), the concrete slurry pushes the moving head (10) to move toward the fixed ring (8), so that the sealing head (12) blocks the flow hole (36). S4. The concrete slurry pushes the push head (33) to move, so that the push head (33) drives the indicator rod (30) to move through the moving rod (28) to show the state of the concrete slurry. S5. When slurry adheres to or blocks the connecting pipe (4), the flow hole (36) or the fixing ring (8), rotate the rotating rod (17) so that the rotating rod (17) drives the cleaning plate (21) and the scraping plate (22) to clean the inner wall of the fixing ring (8), the flow hole (36) and the connecting pipe (4).

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