Concrete-filled spiral-cavity steel pipe, processing device for concrete filling, concrete filling apparatus, and processing technology for spiral-cavity steel pipe

Abstract

The present application relates to a concrete-filled spiral-cavity steel pipe, a processing device for concrete filling, a concrete filling apparatus, and a processing technology for a spiral-cavity steel pipe. The steel pipe comprises: a pipe body comprising an inner pipe and an outer pipe, the pipe body having an axis; a spiral ring plate arranged in an accommodating cavity, the spiral ring plate dividing the accommodating cavity into spiral cavities; and concrete arranged in the spiral cavities, wherein when the pipe body rotates around the axis, the concrete is injected into the spiral cavities from one end of the pipe body. By means of the rotation of the pipe body, the flow and filling of the concrete in the spiral cavities are smoother, so that the filling efficiency is improved. Under the action of a centrifugal force, a gas in the cavities is more easily discharged, and this process facilitates reducing bubbles in the concrete, thereby avoiding the phenomena of hollowing and delamination caused by bubbles.

Description

Spiral cavity steel pipe for filling concrete, processing equipment for filling concrete, concrete filling device, and processing technology of spiral cavity steel pipe.

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 2024114397195, filed on October 15, 2024, entitled "Spiral Cavity Steel Pipe for Filling Concrete and its Processing Technology, and Processing Equipment for Filling Concrete", and claims priority to Chinese patent application No. 2024232490925, filed on December 27, 2024, entitled "Concrete Filling Device with Double-Layer Steel Pipe Sandwich", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of steel pipe technology, and in particular to spiral cavity steel pipes for filling concrete, processing equipment for filling concrete, concrete filling devices, and processing technology for spiral cavity steel pipes. Background Technology

[0004] Steel-concrete composite pipe structures, where the cavity between the pipe walls is filled with concrete, are a special type of pipe structure. This involves pouring concrete into a steel pipe and compacting it to increase the pipe's strength and rigidity, resulting in unique mechanical properties and application advantages. Concrete has high compressive strength but weak bending resistance, while steel, especially structural steel, has strong bending resistance and good elasticity-plasticity, but is prone to instability under compression and loss of axial compressive strength. Steel-concrete composite structures combine the advantages of both, placing the concrete under lateral compression, significantly increasing its compressive strength. Simultaneously, the presence of concrete restricts buckling in all directions, increasing the steel pipe's rigidity. This mutual reinforcement greatly enhances the overall mechanical properties. Steel-concrete composite structures have been applied in practical engineering projects, demonstrating excellent performance.

[0005] Traditional techniques for filling steel pipes with concrete are cumbersome, especially the filling of the cavity between double-layered steel pipes. Due to the long length of the pipes and the narrow, spiral-shaped cavity between the inner and outer layers, the filling process is more difficult and the yield rate is lower. In particular, while the applicant's self-developed double-layered steel pipe with a spiral cavity offers higher strength, it also faces challenges in processing and low efficiency. Furthermore, this steel pipe consists of two layers of steel pipe with a gap between the two walls and a vertical ring plate arranged spirally around the pipe body within the interlayer, forming a spiral cavity that needs to be filled with concrete. While the self-developed double-layered steel pipe offers higher strength, it also faces difficulties in filling, low processing efficiency, and the tendency for air bubbles to form after filling. Summary of the Invention

[0006] According to various embodiments of this application, a spiral cavity steel pipe filled with concrete is provided, the steel pipe comprising:

[0007] The tube body includes an inner tube and an outer tube, with the outer tube sleeved over the outside of the inner tube to form a receiving cavity between the inner tube and the outer tube; the tube body has a centerline;

[0008] A spiral ring plate is disposed in the receiving cavity. The inner circumference of the spiral ring plate is connected to the outer surface of the inner tube, and the outer circumference of the spiral ring plate is connected to the inner surface of the outer tube. The spiral ring plate divides the receiving cavity into a spiral cavity.

[0009] Concrete is placed inside the spiral cavity, and when the tube rotates around the axis, the concrete is injected into the spiral cavity from one end of the tube.

[0010] In one embodiment, the direction of rotation of the tube about the axis is opposite to the direction of helical advance of the spiral ring plate.

[0011] In one embodiment, the outer tube is a straight tube, or the outer tube is a corrugated tube.

[0012] In one embodiment, the steel pipe further includes an annular sealing plate, which is disposed at both ends of the inner pipe and the outer pipe, and at least one of the annular sealing plates is provided with a grouting port and an exhaust / drainage port that are both connected to the outside.

[0013] According to various embodiments of this application, a processing apparatus for filling concrete is provided, the processing apparatus being used to process the spiral cavity steel pipe for filling concrete, the processing apparatus comprising:

[0014] A concrete conveying device for conveying concrete into the spiral cavity of the pipe body;

[0015] A piping assembly, including a pipe connecting the concrete conveying device and the spiral cavity, and a valve disposed on the pipe; and

[0016] A rotary drive device is used to lift the tube and drive the tube to rotate around its axis.

[0017] In one embodiment, the pipe assembly includes a first pipe and a second pipe, the first pipe being connected between the second pipe and the spiral cavity, the second pipe being connected between the first pipe and the concrete conveying device, and the second pipe being arranged along the axis.

[0018] In one embodiment, the first pipe and the second pipe are rotatably connected by a rotary pipe joint, and the first pipe rotates about the axis of the second pipe as the pipe body rotates.

[0019] In one embodiment, the first pipe is provided in multiple forms, and each first pipe corresponds to an independent spiral cavity.

[0020] In one embodiment, the first pipe is made of a flexible material.

[0021] In one embodiment, the cross-sectional area of ​​the first pipe is smaller than the cross-sectional area of ​​the corresponding spiral cavity.

[0022] In one embodiment, the processing equipment further includes a limiting device for restricting the axial movement of the tube.

[0023] In one embodiment, the rotary drive device is provided with a vibration mechanism for vibrating the tube.

[0024] In one embodiment, the rotary drive device further includes a lifting component, which enables the axis of the pipe to be at a preset angle to the horizon, thereby raising the grouting port side of the steel pipe.

[0025] According to various embodiments of this application, a concrete filling device is provided for filling concrete, the concrete filling device being used to process the spiral cavity steel pipe for filling concrete, the concrete filling device comprising:

[0026] A horizontally placed rotating pallet, with the steel pipe vertically mounted on the rotating pallet, the pallet surface being horizontally positioned and configured to rotate about the axis; and

[0027] A concrete conveying assembly for conveying concrete into the spiral cavity through the grouting port.

[0028] In one embodiment, the grouting port is located at the top of the steel pipe, and the top is defined as the side facing away from the rotating tray.

[0029] In one embodiment, the concrete filling device further includes a stabilizing component abutting against the outer wall of the steel pipe, the steel pipe being rotatable relative to the stabilizing component.

[0030] In one embodiment, the stabilizing component includes a support and a roller, the roller being disposed on the support and the support defining the placement position of the steel pipe to abut the roller against the outer wall of the steel pipe.

[0031] In one embodiment, the exhaust drain is located at the top of the steel pipe, the top being defined as the side facing away from the rotating tray. The concrete filling device further includes a vacuum pump and a vacuum pipe, the vacuum pipe connecting the vacuum pump and the exhaust drain.

[0032] In one embodiment, the vacuum tube rotates synchronously with the rotating tray.

[0033] In one embodiment, the concrete conveying assembly includes a hopper and a pipe assembly connecting the hopper and the grouting port. The concrete conveying assembly rotates synchronously with the rotating pallet, or the pipe assembly rotates synchronously with the rotating pallet.

[0034] In one embodiment, the rotating tray is provided with a vibration mechanism that causes the rotating tray to vibrate.

[0035] In one embodiment, the rotating tray is provided with clamping elements for holding the steel pipe.

[0036] According to various embodiments of this application, a processing method for a concrete-filled spiral cavity steel pipe is provided, the processing method being used to process the concrete-filled spiral cavity steel pipe, comprising the following steps:

[0037] Start the rotating tray to make the tube rotate around its own axis; and

[0038] Concrete is poured from one end of the pipe body into the spiral cavity of the pipe body via a pipe assembly from the self-feeding hopper.

[0039] In one embodiment, the step of rotating the pipe body around its axis further includes raising the grouting port side of the pipe body.

[0040] In one embodiment, after concrete is discharged from the vent and drain outlet of the steel pipe, the concrete injection is stopped, and the grouting port and the vent and drain outlet are closed.

[0041] In one embodiment, the step of injecting concrete from one end of the pipe into the spiral cavity of the pipe includes: adjusting the flow rate of concrete injected into the spiral cavity so that the concrete does not fill the entire spiral cavity.

[0042] In one embodiment, the step of injecting concrete from one end of the pipe into the spiral cavity of the pipe includes: adjusting the rotation speed of the pipe to a preset speed range, wherein within the preset speed range, the concrete in the spiral cavity continuously adheres to the inner wall of the outer pipe in the circumferential direction, and the concrete forms a gap with the outer wall of the inner pipe. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0044] Figure 1 is a schematic diagram of the structure of a steel pipe without concrete filling in one embodiment of this application.

[0045] Figure 2 is a structural schematic diagram of a steel pipe in one embodiment of this application when the outer tube is a corrugated tube.

[0046] Figure 3 is a magnified partial cross-sectional view of point A in Figure 2.

[0047] Figure 4 is a schematic diagram of the steel pipe connection processing equipment in one embodiment of this application.

[0048] Figure 5 is a side view of a steel pipe connection processing device according to an embodiment of this application.

[0049] Figure 6 is a schematic diagram of the process of filling concrete under the cross-section of the steel pipe in one embodiment of this application.

[0050] Figure 7 is a schematic diagram of the concrete filling process from another perspective in one embodiment of this application.

[0051] Figure 8 is a structural schematic diagram of a concrete filling device according to an embodiment of this application.

[0052] Figure 9 is a structural schematic diagram of a concrete filling device according to another embodiment of this application.

[0053] Reference numerals: 100, Steel pipe; 101, Centerline; 110, Pipe body; 111, Outer pipe; 112, Inner pipe; 113, Spiral cavity; 120, Spiral ring plate; 130, Annular sealing plate; 131, Grouting port; 132, Exhaust and drainage port; 140, Concrete; 200, Processing equipment; 210, First pipeline; 211, Grouting valve; 220, Second pipeline; 230, Concrete conveying device; 240, Rotary pipe joint; 241, Fixing component; 250, Exhaust pipe; 251, Exhaust valve; 260, Rotary drive device; 270, Rotary tray; 300, Concrete filling device; 310, Support component; 320, Roller; 330, Stabilizing component; 400, Concrete conveying component; 410, Conveying pump; 420, Pipeline assembly; 430, Hopper; 500, Vacuum pump; 501, Vacuum tube. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] Referring to Figures 1-7, Figure 1 shows a schematic diagram of the structure of a spiral cavity steel pipe 100 without concrete 140 in one embodiment of this application, and Figures 2-6 show schematic diagrams of a spiral cavity steel pipe 100 filled with concrete 140 in one embodiment of this application.

[0056] An embodiment of this application provides a steel pipe 100, including a pipe body 110, a spiral ring plate 120, and concrete 140. The pipe body 110 includes an inner pipe 112 and an outer pipe 111, with the outer pipe 111 spaced within the inner pipe 112 to form a receiving cavity between them. The pipe body 110 has a centerline, defined as a virtual straight line passing through the center of the pipe body. The spiral ring plate 120 is disposed within the receiving cavity; its inner circumference connects to the outer surface of the inner pipe 112, and its outer circumference connects to the inner surface of the outer pipe 111. The spiral ring plate 120 divides the receiving cavity into a spiral cavity 113. Concrete 140 is disposed within the spiral cavity 113, and is injected into the spiral cavity 113 from one end of the pipe body 110 by the pipe body 110 rotating around its centerline 101.

[0057] Through the rotation of the pipe 110, the concrete 140 flows and fills more smoothly within the spiral cavity under the combined action of centrifugal force and gravity, which helps improve filling efficiency. Centrifugal force helps overcome the resistance during the flow of concrete 140, allowing it to adhere to the pipe wall and fill the inner cavity of the steel pipe 100 more quickly. Due to the centrifugal force, a gap is created between the concrete and the inner pipe during the filling process. This gap allows the expelled gas to escape upwards, making it easier for the gas inside the cavity to be expelled. This process helps reduce air bubbles inside the concrete 140, avoiding hollowing and delamination caused by air bubbles, thereby improving the density and overall performance of the concrete 140 and forming a smooth venting channel. The pressure inside the cavity of the steel pipe 100 is maintained at a low level, avoiding the risk of bulging or deformation of the pipe wall due to excessive pressure. The vibration generated during the rotation of the steel pipe 100 (pipe body 110) acts as a compaction agent, helping to expel air bubbles and compact the concrete 140, thus improving its strength and durability. This technology effectively solves the problem of difficult filling at the sharp corners between the annular sealing plate and the spiral ring at the end of the steel pipe 100 (pipe body 110), ensuring that the concrete 140 is evenly filled to every corner, resulting in more thorough filling. This technology is easily integrated with other processes such as the cutting, welding, and anti-corrosion treatment of the steel pipe 100 into a production line. Its simple structure enables automated and continuous production, improving overall construction efficiency.

[0058] In one embodiment, the centerline 101 of the pipe body 110 forms a preset angle with the horizon, raising the grouting port side of the steel pipe. The horizon is defined as a straight line parallel to the horizontal mounting surface of the pipe body 110 during operation. The preset angle between the centerline 101 of the pipe body 110 and the horizon means that the pipe body 110 is inclined relative to the horizontal mounting surface. The preset angle is approximately 5-30°, and preferably, the preset angle can be, for example, 5°, 8°, 10°, 15°, or 20°.

[0059] For the steel pipe 100 with a spiral cavity 113, research has shown that there are two processing methods that can be adopted: the "lifting method" and the "horizontal method". The lifting method involves first sealing the interlayer at both ends of the pipe 110 with sealing rings, then erecting the pipe 110. Grouting is then performed through the grouting port 131 on the sealing ring at the bottom of the pipe 110. The concrete 140 used is a self-leveling fine aggregate concrete with good fluidity. Grouting continues until grout exits from the grout outlet at the top of the pipe, at which point filling stops and the concrete solidifies. This method avoids the formation of air pockets and voids. However, erecting the pipe 110 results in poor construction safety. Furthermore, when the pipe 110 is long, the grouting pressure is high, which can easily cause the bottom pipe wall to bulge and deform, leading to a low yield. Additionally, it places excessive demands on the height of the factory building. The "horizontal method" involves placing the pipe body 110 horizontally and filling the spiral cavity 113 with concrete 140. This method requires opening vent holes and drainage holes above each spiral cavity of the pipe body 110. The filling method is complex, and after filling, each hole must be welded and sealed, and secondary anti-corrosion treatment is required. This involves many steps, and the welding and sealing of each hole is also a challenge for quality control. However, by setting the pipe body 110 at a preset angle, it is possible to avoid excessive occupation of processing space, avoid excessive grouting pressure causing local bulging of the pipe wall, and avoid the process of opening and sealing multiple holes in the pipe body 110, thus avoiding any impact on the structural strength of the pipe body 110. The design of raising the steel pipe 100 on one side of the grouting port 131 facilitates the flow and compaction of the concrete 140 in the cavity. The preset angled setting of the pipe body 110 also makes it easier for gas to move obliquely upward along the outer pipe 111 and be discharged from the steel pipe 100 when rotating, further improving the filling quality of the concrete 140 and the stability of the structure.

[0060] In one embodiment, the tube 110 rotates about the axis 101 in the opposite direction to the spiral advance direction of the spiral ring plate 120. That is, in the side cross-sectional view shown in the figure, when the spiral advance direction of the spiral ring plate 120 is perpendicular to the plane of the paper, the tube 110 should rotate clockwise about the axis 101, at which time the concrete slurry 140 can move deeper along the spiral ring plate 120 under the influence of centrifugal force, gravity, and conveying drive.

[0061] In one embodiment, the outer tube 111 is either a straight tube or a corrugated tube. A straight tube is a cylindrical tubular structure formed by straight steel plates. A corrugated tube is a cylindrical tubular structure formed by corrugated steel plates with corrugated protrusions and depressions on its outer surface. As shown in Figures 2 and 3, when the outer tube 111 is a corrugated tube, the corrugations are spiral-shaped, and the troughs of the corrugations on the outer tube 111 can abut against the outer surface of the inner tube 112. When each abutment is welded to the inner tube 112, the weld can serve as a spiral ring plate 120. At this time, the height of the spiral ring plate 120 is extremely small, and a spiral cavity 113 is formed between adjacent welds and the inner tube 112.

[0062] The inner tube 112 is a straight tube or a corrugated tube. The corrugation of the inner tube 112 can correspond to the appearance, and the inner wall of the inner tube 112 forms an inner cavity, which serves as the inner cavity of the steel pipe 100.

[0063] In one embodiment, the steel pipe 100 further includes an annular sealing plate 130, which is disposed at both ends of the inner pipe 112 and the outer pipe 111. At least one annular sealing plate 130 is provided with a grouting port 131 and an exhaust and drainage port 132 that are both connected to the outside.

[0064] Specifically, the annular seal serves as the two end faces of the steel pipe 100, sealing the receiving cavity. Preferably, only one end of the annular seal plate 130 of the steel pipe 100 is provided with a grouting port 131. Looking towards the pipe body 110 from the side where the grouting port 131 is provided, as shown in Figures 5 and 6, the pipe body 110 should rotate counterclockwise, allowing the concrete grout 140 to enter through the grouting port 131 and move towards a deeper direction.

[0065] Grouting ports 131 and vent / drain ports 132 are spaced apart to prevent freshly injected concrete grout from being directly discharged. Preferably, the vent / drain port 132 is located closer to the inner pipe 112 within the annular seal; for example, it is located within 20% of the minimum distance between the inner pipe 112 and the outer pipe 111, facilitating more thorough grout accumulation starting from the outer pipe 111. Similarly, grouting ports 131 are located closer to the inner pipe 112 within the annular seal; for example, they are located within 20% of the minimum distance between the inner pipe 112 and the outer pipe 111, facilitating more thorough grout accumulation starting from the outer pipe 111. Multiple grouting ports 131 and vent / drain ports 132 can be provided.

[0066] Since the grouting port 131 and the venting and draining port 132 are located on the annular seal, air and moisture can be smoothly discharged from one end of the steel pipe 100 during the filling process of concrete 140. Therefore, there is no need to set additional venting and draining ports 132 and water discharge holes on the circumferential surface of the pipe body 110, which simplifies the structural design of the pipe body 110.

[0067] In one embodiment, the concrete 140 is dry-hard concrete 140, which may contain an expansion agent. When using dry-hard concrete 140, due to its low slump, the concrete 140 can self-set and is less prone to flowing when the grouting port 131 is removed after filling, thereby avoiding the formation of voids in the port and ensuring the compactness and uniformity of the concrete 140 filling.

[0068] Figures 4-5 show schematic diagrams of a processing device 200 for filling concrete 140 according to an embodiment of this application. The processing device 200 is used to process a spiral cavity steel pipe 100 for filling concrete 140 as described above. The processing device 200 includes a concrete conveying device 230, a pipe assembly, and a rotary drive device. The concrete conveying device 230 is used to convey concrete 140 to the steel pipe 100. The pipe assembly includes a pipe connecting the concrete conveying device 230 and the spiral cavity 113, and a valve disposed on the pipe. The rotary drive device 260 is connected to the steel pipe 100 for transmission. The rotary drive device is used to lift the pipe body and drive the pipe body to rotate around its axis.

[0069] In one embodiment, the discharge port of the concrete conveying device 230 is located on the axis 101, and the pipe assembly connects the discharge port and the spiral cavity 113.

[0070] In one embodiment, the pipe assembly includes a first pipe 210 and a second pipe 220, the first pipe 210 being connected between the second pipe 220 and the spiral cavity 113, and the second pipe 220 being connected between the first pipe 210 and the discharge port, the second pipe 220 being arranged along the axis 101.

[0071] In one embodiment, the first pipe 210 and the second pipe 220 are rotatably connected via a rotary pipe joint 240. The first pipe 210 rotates around the second pipe 220 as the pipe body 110 rotates. Specifically, the rotary pipe joint 240 has a rotating structure that allows the connecting structures at both ends to rotate directly relative to each other. The two ends of the rotary pipe joint 240 are respectively connected to the inlet of the first pipe 210 and the outlet of the second pipe 220. When the pipe body 110 rotates, the first pipe 210 is driven to rotate around the second pipe 220. The main body of the rotary pipe joint 240 is fixed in a preset position by a fixing member 241.

[0072] In one embodiment, multiple first pipes 210 are provided, each first pipe 210 corresponding to an independent spiral cavity 113. Correspondingly, multiple discharge ports are provided, each discharge port corresponding to one first pipe 210, and at least one discharge port corresponding to an independent spiral cavity 113. When multiple first pipes 210 are provided, the rotary pipe joint 240 is a one-to-many structure, comprising a fixed body with an inlet, a rotatable body, and multiple outlets on the rotatable body. The fixed body is fixed in a preset position by a fastener 241.

[0073] A grouting valve 211 is also provided between the first pipe 210 and the grouting port 131. The processing equipment 200 also includes an exhaust pipe 250 located at the exhaust drain port 132, and an exhaust valve 251 is provided between the exhaust drain port 132 and the exhaust pipe 250.

[0074] In one embodiment, the first conduit 210 is made of a flexible material. The first conduit 210 can be a rubber tube, a polyurethane hose, a PVC hose, etc., and preferably, the first conduit 210 is a rubber tube.

[0075] In one embodiment, the cross-sectional area of ​​the first conduit 210 is smaller than the cross-sectional area of ​​the corresponding helical cavity 113. Specifically, the diameter of the first conduit 210 is less than or equal to the width of the inlet of the helical cavity 113.

[0076] In one embodiment, the processing equipment 200 further includes a limiting device for limiting the axial movement of the tube body 110.

[0077] The rotary drive device 260 is located at the bottom of the steel pipe 100. The rotary drive device 260 is connected to the outer pipe 111 and can abut against the outer wall of the outer pipe 111. When the rotary drive device 260 rotates, it drives the outer pipe 111 to rotate through friction.

[0078] In one embodiment, the rotary drive device 260 further includes a lifting device, which is movably connected to the pipe body 110. The lifting device enables the axis of the pipe body 110 to be at a preset angle with the horizon, and lifts the end of the steel pipe 100 with the grouting port 131.

[0079] The limiting device and the lifting device are integrated into one structure. While axially fixing the outer tube 111, the end with the grouting port 131 can be raised, so that the tube body 110 is tilted and will not move axially.

[0080] In one embodiment, the rotary drive device is provided with a vibration mechanism for vibrating the steel pipe.

[0081] Figures 6-7 illustrate a schematic diagram of the processing technology of the spiral cavity steel pipe 100 filled with concrete 140 in one embodiment of this application. The processing technology for the spiral cavity steel pipe 100 filled with concrete 140 as described above includes the following steps:

[0082] S100, Start the rotating tray to make the pipe body 110 rotate around the axis 101; and S200, Inject concrete 140 from the hopper into the spiral cavity 113 of the pipe body 110 from one end of the pipe body 110 through the pipe assembly.

[0083] In one embodiment, the step of rotating the pipe body 110 around the axis 101 further includes: raising one side of the grouting port of the pipe body 110 so that the pipe body 110 rotates around the axis 101 which is at a preset angle to the horizon.

[0084] In one embodiment, after concrete 140 is discharged from the vent and drain port 132 of the steel pipe 100, the injection of concrete 140 is stopped, and the grouting port 131 and the vent and drain port 132 are closed.

[0085] In one embodiment, the step of injecting concrete from one end of the pipe 110 into the spiral cavity 113 of the pipe 110 includes adjusting the flow rate of the concrete injected into the spiral cavity 113 such that the concrete does not completely fill the spiral cavity 113. Specifically, not completely filling the spiral cavity 113 can be defined as the ratio of the volume of injected concrete to the total volume of the spiral cavity 113 being less than or equal to 80%, and more particularly less than or equal to 70% or 60%.

[0086] In one embodiment, the step of injecting concrete from one end of the pipe 110 into the spiral cavity 113 of the pipe 110 includes: adjusting the rotation speed of the pipe 110 to a preset speed range, within which the concrete in the spiral cavity 113 continuously adheres to the inner wall of the outer pipe 111 in the circumferential direction, and a gap is formed between the concrete and the outer wall 111 of the inner pipe. Continuous circumferential adhesion means that, at least along a certain length of the outer pipe 111, the concrete can adhere to the inner wall of the outer pipe 111 in a 360° manner, forming a continuously covering layer of concrete fluid in the circumferential direction.

[0087] The processing technology using the aforementioned processing equipment 200 is as follows.

[0088] After all the equipment and parts in the processing equipment 200 are installed, the drive device 260 is started to make the steel pipe 100 body 110 rotate around the inclined axis 101. The steel pipe 100 body 110 begins to rotate, and the first pipe 210 begins to rotate with the steel pipe 100 body. The rotation direction of the steel pipe 100 body 110 is opposite to the spiral forward direction of the spiral ring plate 120 of the steel pipe 100.

[0089] The concrete conveying device 230 is started, and concrete 140 is injected into the spiral cavity of the steel pipe 100 body 110 through the second pipe 220, the rotary pipe joint 240, and the first pipe 210. The rotation speed of the steel pipe 100 body 110 is configured to ensure that the centrifugal force generated by it presses the concrete 140 against the inner wall of the outer pipe 111 of the steel pipe 100, and leaves a gap between the concrete 140 and the outer wall of the inner pipe wall of the steel pipe 100, as shown in Figures 6 and 7.

[0090] Under centrifugal force, the concrete 140 is pressed against the inner wall of the outer pipe 111 and will spread outwards on the wall surface. The helical angle of the spiral ring will cause the direction of the concrete 140 to move forward. In addition, as the steel pipe 100 body 110 on the side of the grouting port 131 is raised, the concrete 140 in the spiral cavity will move towards the other end of the steel pipe 100 body 110 under the action of gravity until it reaches the other end and gradually fills the end cavity.

[0091] During this process, the air inside the spiral cavity is squeezed out in the opposite direction through the gap between the concrete 140 inside the cavity and the inner wall of the pipe, and is discharged from the exhaust and drainage port 132 of the steel pipe 100 body 110 on the side of the grouting port 131.

[0092] After the cavity is completely filled with concrete 140 and the concrete 140 slurry is discharged from the vent, close the grouting valve 211 and the venting valve 251, and shut down the concrete conveying device 230.

[0093] After the concrete 140 has dried, steel pipes 100 are manufactured, and multiple steel pipes 100 are welded together to form a pipeline. Adjacent steel pipes 100 can be spirally welded, forming a spiral weld seam on the pipeline after welding.

[0094] During the above process, the flow rate and volume of concrete 140 in the first pipe 210 must be such that after entering the spiral cavity, the concrete 140 does not fill the entire cross-section of the cavity under the action of centrifugal force.

[0095] During the above process, the vibration of the steel pipe 100 body 110 during rotation has a vibratory compaction effect on the concrete 140 in the spiral cavity 113, making the concrete 140 gradually denser.

[0096] Figures 8 and 9 show schematic diagrams of the concrete filling device 300 according to an embodiment of this application. The steel pipe 100 includes an inner pipe 112 and an outer pipe 111, forming a receiving cavity between the inner pipe 112 and the outer pipe 111. One end of the steel pipe 100 is provided with a grouting port 131 and an exhaust / drainage port 132 that connect the receiving cavity to the outside. The concrete filling device 300 provided in an embodiment of this application includes a rotating pallet 270 and a concrete conveying assembly 400. The steel pipe 100 is vertically arranged on the rotating pallet 270 along a first direction. The pallet surface of the rotating pallet 270 is horizontally arranged and configured to rotate about the first direction (axis line). "Horizontal" is defined as a planar direction perpendicular to the first direction. The concrete conveying assembly 400 is used to convey concrete into the receiving cavity of the steel pipe through the grouting port 131.

[0097] The aforementioned concrete filling device 300 improves concrete filling efficiency: Under the combined action of centrifugal force and gravity, the flow and filling of concrete within the spiral cavity are smoother, contributing to improved filling efficiency. Centrifugal force helps overcome resistance during concrete flow, allowing concrete to more quickly fill the inner cavity of the steel pipe 110 from the other end of the grouting port 131 towards the other end of the grouting port 131. It also reduces air bubbles and voids: Due to centrifugal force, during filling, the concrete adheres to the outside of the cavity and forms gaps with the inner wall, allowing air circulation. Under the influence of concrete gravity and gas buoyancy, air within the cavity is expelled in the opposite direction, forming a smooth exhaust channel. This process helps reduce air bubbles inside the concrete, preventing voids and delamination caused by air bubbles, thereby improving the density and overall performance of the concrete. Finally, it enables low-pressure filling: During filling, due to centrifugal force, the pressure of the concrete fluid within the steel pipe cavity remains at a low level, avoiding the risk of bulging or deformation of the pipe wall due to excessive pressure. Wide applicability: The vertically arranged steel pipe 100, rotating at a relatively low speed with the aid of gravity, can complete the flow of concrete, requiring low rotation speed and applicable to steel pipes of various sizes, thus reducing the strength requirements of the filling equipment. Promotes air removal: The vertical design of the steel pipe facilitates the flow and compaction of concrete within the cavity, while also promoting air removal, further improving the filling quality and structural stability. Vibration compaction: The vibration generated during the rotation of the steel pipe 110 acts as a compaction agent, helping to remove air bubbles and compact the concrete, improving its strength and durability. Solves the filling problem of sharp corners: This technology effectively solves the problem of difficult filling of sharp corners between the annular sealing plate and the spiral ring at the end of the steel pipe 110, ensuring that concrete is evenly filled to every corner for more thorough filling. Production line integration: This technology is easily integrated with other processes such as steel pipe cutting, welding, and anti-corrosion treatment to form a production line, achieving automated and continuous production and improving overall construction efficiency. The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] In one embodiment, the rotating tray 270 is arranged parallel to the ground (or any horizontal placement surface), and the first direction is the direction perpendicular to the ground, which is also the direction of the axis of the steel pipe 100.

[0099] In one embodiment, the rotating tray 270 is provided with clamping members for clamping the steel pipe 100, so that the steel pipe 100 rotates synchronously with the rotating tray 270.

[0100] In one embodiment, the steel pipe 100 includes a pipe body 110 and a spiral ring plate 120. The pipe body 110 includes an inner pipe 112 and an outer pipe 111, which are sleeved together. The spiral ring plate 120 is spirally disposed between the inner pipe 112 and the outer pipe 111, dividing the receiving cavity into a spiral cavity 113. The concrete conveying assembly 400 is used to convey concrete into the spiral cavity 113. Furthermore, the rotation direction of the pipe body 110 about its axis is opposite to the spiral forward direction of the spiral ring plate 120.

[0101] In one embodiment, the outer tube 111 is a straight tube or a corrugated tube. The straight tube is a cylindrical tubular structure formed by a flat steel plate. The corrugated tube is a cylindrical tubular structure formed by a corrugated steel plate with corrugated protrusions and depressions on the outer surface.

[0102] In one embodiment, the grouting port 131 is located on the side of the steel pipe 100 away from the rotating tray 270. When the steel pipe 100 is vertically mounted on the rotating tray 270, the lower end face is in contact with the rotating tray 270, and the upper end face is provided with at least one grouting port 131, which is spaced apart from the exhaust and drainage port 132.

[0103] In one embodiment, the steel pipe 100 further includes an annular sealing plate 130, which is disposed at both ends of the inner pipe 112 and the outer pipe 111. The annular sealing plate 130, on the side facing away from the rotating tray 270, has a grouting port 131 and an exhaust / drainage port 132, both communicating with the outside. The annular sealing plate 130 is welded to the upper and lower ends of the inner pipe 112 and the outer pipe 111 respectively to seal the accommodating cavity. The grouting port 131 and the exhaust / drainage port 132 are spaced apart on the annular sealing plate 130.

[0104] In one embodiment, the concrete filling device 300 further includes a stabilizing component 330, which abuts against the outer wall 111 of the steel pipe 100, and the steel pipe 100 is rotatable relative to the stabilizing component 330. The stabilizing component 330 includes a support member 310 and a roller 320, the roller 320 being disposed on the support member 310. The support member 310 defines the placement position of the steel pipe 100 so that the roller 320 abuts against the outer wall 111 of the steel pipe 100. Further, the support member 310 is fixed to the external structure, and at least two support members 310 are provided. Multiple support members 310 may be located on the same horizontal plane or on different horizontal planes to enclose a circular or cylindrical space. The diameter of the area defined by the multiple support members 310 is the sum of the diameter of the roller 320 and the outer diameter of the steel pipe 100. For example, when only two support members 310 are provided, the two support members 310 are circumferentially spaced 180° apart.

[0105] In one embodiment, the exhaust drain outlet 132 is located on the side of the steel pipe 100 away from the rotating tray 270. The concrete filling device 300 also includes a vacuum pump 500 and a vacuum pipe 501, with the vacuum pipe 501 connecting the vacuum pump 500 and the exhaust drain outlet 132. The exhaust drain outlet 132 and the grouting port 131 are spaced apart. When there is only one exhaust drain outlet 132 and one grouting port 131, the circumferential distance between the exhaust drain outlet 132 and the grouting port 131 is 180°.

[0106] In one embodiment, the vacuum pump 500 rotates synchronously with the rotating tray 270, and / or the vacuum tube 501 rotates synchronously with the rotating tray 270. When the vacuum pump 500 rotates synchronously with the rotating tray 270, the vacuum pump 500 and the vacuum tube 501 can be mounted on the rotating tray 270. When the vacuum tube 501 rotates synchronously with the rotating tray 270, the vacuum tube 501 and the vacuum pump 500 are connected by a rotatable pipe joint.

[0107] In one embodiment, as shown in FIG8, the concrete conveying assembly 400 includes a conveying pump 410 and a pipe assembly 420 connecting the conveying pump 410 and the grouting port 131. The concrete conveying assembly 400 rotates synchronously with the rotating pallet 270, or the pipe assembly 420 rotates synchronously with the rotating pallet 270. When the concrete conveying assembly 400 rotates synchronously with the rotating pallet 270 as a whole, the concrete conveying assembly 400 can be mounted on the rotating pallet 270. When the pipe assembly 420 rotates synchronously with the rotating pallet 270, the concrete conveying assembly 400 and the pipe assembly 420 are connected by a rotatable pipe joint.

[0108] In another embodiment shown in Figure 9, the concrete filling device 300 includes a hopper 430, which is directly fitted onto the top of the steel pipe 100 instead of the conveying pump 410. An inclined pipe assembly 420 connected to the spiral cavity 113 is provided below the hopper 430.

[0109] In one embodiment, the pipe assembly 420 includes a first pipe and a second pipe. The first pipe is connected between the second pipe and the grouting port 131, and the second pipe is connected between the first pipe and the concrete conveying assembly 400. The first pipe rotates about the axis of the second pipe as the steel pipe 100 rotates. The first pipe and the second pipe are connected by a rotatable pipe joint.

[0110] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0111] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0112] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0113] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0114] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A spiral-shaped cavity steel pipe filled with concrete, characterized in that, The steel pipe includes: The tube body includes an inner tube and an outer tube, with the outer tube sleeved over the outside of the inner tube to form a receiving cavity between the inner tube and the outer tube; the tube body has a centerline; A spiral ring plate is disposed in the receiving cavity. The inner circumference of the spiral ring plate is connected to the outer surface of the inner tube, and the outer circumference of the spiral ring plate is connected to the inner surface of the outer tube. The spiral ring plate divides the receiving cavity into a spiral cavity. Concrete is placed inside the spiral cavity, and when the tube rotates around the axis, the concrete is injected into the spiral cavity from one end of the tube.

2. The spiral cavity steel pipe filled with concrete according to claim 1, characterized in that, The direction of rotation of the tube body around the axis is opposite to the direction of spiral advance of the spiral ring plate.

3. The spiral cavity steel pipe filled with concrete according to claim 1, characterized in that, The outer tube is either a straight tube or a corrugated tube.

4. The spiral cavity steel pipe filled with concrete according to claim 1, characterized in that, The steel pipe also includes an annular sealing plate, which is disposed at both ends of the inner pipe and the outer pipe. At least one of the annular sealing plates is provided with a grouting port and an exhaust / drainage port that are both connected to the outside.

5. A concrete filling device for filling concrete, characterized in that, The concrete filling device is used to process the spiral cavity steel pipe filled with concrete as described in any one of claims 1-4, and the concrete filling device comprises: A horizontally placed rotating pallet, with the steel pipe vertically mounted on the rotating pallet, the pallet surface being horizontally positioned and configured to rotate about the axis; and A concrete conveying assembly for conveying concrete into the spiral cavity through the grouting port.

6. The concrete filling device for filling concrete according to claim 5, characterized in that, The grouting port is located at the top of the steel pipe.

7. The concrete filling device for filling concrete according to claim 5, characterized in that, The concrete filling device also includes a stabilizing component that abuts against the outer wall of the steel pipe, and the steel pipe is rotatable relative to the stabilizing component.

8. The concrete filling device for filling concrete according to claim 7, characterized in that, The stabilizing component includes a support and a roller. The roller is disposed on the support and the support defines the placement position of the steel pipe so that the roller is pressed against the outer wall of the steel pipe.

9. The concrete filling device for filling concrete according to claim 5, characterized in that, The exhaust drain outlet is located at the top, and the concrete filling device also includes a vacuum pump and a vacuum pipe, with the vacuum pipe connecting the vacuum pump and the exhaust drain outlet.

10. The concrete filling device for filling concrete according to claim 9, characterized in that, The vacuum tube rotates synchronously with the rotating tray.

11. The concrete filling device for filling concrete according to claim 5, characterized in that, The concrete conveying assembly includes a hopper and a pipe assembly connecting the hopper and the grouting port. The concrete conveying assembly rotates synchronously with the rotating pallet, or the pipe assembly rotates synchronously with the rotating pallet.

12. The concrete filling device for filling concrete according to claim 5, characterized in that, The rotating tray is equipped with a vibration mechanism that causes the rotating tray to vibrate.

13. A processing technology for a spiral-shaped cavity steel pipe filled with concrete, characterized in that, The processing technology is used to process the spiral cavity steel pipe filled with concrete as described in any one of claims 1-4, and includes the following steps: Start the rotating tray to make the tube rotate around its own axis; and Concrete is poured from one end of the pipe body into the spiral cavity of the pipe body via a pipe assembly from the self-feeding hopper.

14. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 13, characterized in that, The direction of rotation of the tube is opposite to the direction of forward movement of the spiral cavity.

15. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 13, characterized in that, After the concrete is discharged from the exhaust and drainage port of the steel pipe, stop injecting concrete and close the grouting port and the exhaust and drainage port.

16. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 13, characterized in that, The step of injecting concrete from the hopper into the spiral cavity of the pipe includes: adjusting the flow rate of concrete injected into the spiral cavity so that the concrete does not fill the entire spiral cavity.

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