Spiral cavity steel pipe filled with concrete, machining process of spiral cavity steel pipe and machining equipment for filling concrete

Abstract

The invention relates to a spiral cavity steel pipe filled with concrete, a machining technology of the spiral cavity steel pipe and machining equipment used for filling the concrete, the steel pipe comprises a pipe body, the pipe body comprises an inner pipe and an outer pipe, the inner pipe is sleeved with the outer pipe at intervals, and therefore a containing cavity is formed between the inner pipe and the outer pipe; the spiral ring plate is arranged in the containing cavity, the inner circumference of the spiral ring plate is connected with the outer surface of the inner pipe, the outer circumference of the spiral ring plate is connected with the inner surface of the outer pipe, and the containing cavity is divided into a spiral cavity body by the spiral ring plate; the concrete is arranged in the spiral cavity, and the concrete is injected into the spiral cavity from one end of the pipe body in the mode that the pipe body rotates around the axis. According to the concrete filling device, flowing and filling of concrete in the spiral cavity are smoother, the filling efficiency can be improved, bubbles in the concrete can be reduced, hollowing and delaminating phenomena caused by the bubbles are avoided, and therefore the compactness and the overall performance of the concrete are improved.

Description

Technical Field

[0001] The present application relates to the technical field of concrete steel pipe combined structures, and in particular to a spiral cavity steel pipe filled with concrete and a processing technology thereof, and processing equipment for filling concrete. Background Art

[0002] The steel tube structure filled with concrete in the interlayer cavity of the tube wall is a special pipe structure, that is, concrete is poured into the steel tube and compacted to increase the strength and rigidity of the steel tube. It has unique mechanical properties and application advantages. Concrete has high compressive strength, but weak bending resistance, while steel, especially steel sections, has strong bending resistance and good elastic plasticity, but it is easy to become unstable and lose axial compressive resistance when under pressure. Steel tube concrete can combine the advantages of the two in structure, which can put the concrete in a lateral compression state, and its compressive strength can be doubled. At the same time, due to the presence of concrete, the instability buckling of the steel tube structure in each direction is limited, and the rigidity of the steel tube is improved. The two reinforce each other, thereby greatly improving various mechanical properties. The steel and concrete composite structure has been applied in actual engineering projects and has shown good performance.

[0003] In traditional technology, the process of filling steel pipes with concrete is complicated, especially filling the inner cavity between double-layer steel pipes with concrete. Since the pipes are long in length and the cavity between the inner and outer layers is narrow and spiral, the difficulty of the filling process is increased and the yield rate is reduced. In particular, the double-layer steel pipe with a spiral cavity developed by the applicant has higher strength among the double-layer steel pipes, but it also faces the problems of inconvenient processing and low processing efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a spiral cavity steel pipe for filling concrete with simplified process, high processing yield and high processing efficiency, and its processing technology and processing equipment for filling concrete in order to solve the above technical problems.

[0005] In a first aspect, a spiral cavity steel pipe filled with concrete is provided, the steel pipe comprising:

[0006] The tube body comprises an inner tube and an outer tube, wherein the outer tube is sleeved outside the inner tube to form a receiving cavity between the inner tube and the outer tube;

[0007] a spiral ring plate, disposed in the accommodating cavity, wherein the inner circumference of the spiral ring plate is connected to the outer surface of the inner tube, the outer circumference of the spiral ring plate is connected to the inner surface of the outer tube, and the spiral ring plate divides the accommodating cavity into spiral cavities; and

[0008] Concrete is arranged in the spiral cavity, and the concrete is injected into the spiral cavity from one end of the tube body by rotating the tube body around its own axis.

[0009] In one embodiment, the rotation direction of the tube body around the axis is opposite to the spiral advancement direction of the spiral ring plate.

[0010] In one embodiment, the outer tube is a straight tube, or the outer tube is a corrugated tube.

[0011] In one of the embodiments, 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 and drainage port both of which are connected to the outside.

[0012] In a second aspect, a processing device for filling concrete is provided, wherein the processing device is used to process the spiral cavity steel pipe filled with concrete as described above, and the processing device comprises:

[0013] A concrete conveying device, used for conveying concrete to the spiral cavity of the steel pipe;

[0014] A pipeline assembly, comprising a pipeline connected to the concrete conveying device and the spiral cavity and a valve arranged on the pipeline; and

[0015] A rotation drive device is connected to the steel pipe in a transmission manner, and the rotation device is used to hold up the pipe body and drive the pipe body to rotate around the axis.

[0016] In one embodiment, the pipeline assembly includes a first pipeline and a second pipeline, the first pipeline is connected between the second pipeline and the spiral cavity, the second pipeline is connected between the first pipeline and the concrete conveying device, and the second pipeline is arranged along the axis.

[0017] In one embodiment, the first pipe and the second pipe are rotatably connected via a rotating pipe joint, and the first pipe rotates around the axis of the second pipe as the pipe body rotates.

[0018] In one embodiment, a plurality of the first pipes are provided, and each of the first pipes corresponds to an independent spiral cavity.

[0019] In one embodiment, the first pipe is made of flexible material.

[0020] In one embodiment, the cross-sectional area of ​​the first pipe is smaller than the cross-sectional area of ​​the corresponding spiral cavity.

[0021] In one of the embodiments, the processing equipment further includes a limiting device, and the limiting device is used to limit the axial movement of the tube body.

[0022] In one of the embodiments, the rotary drive device is provided with a vibration mechanism, and the vibration mechanism is used to vibrate the steel pipe.

[0023] In one of the embodiments, the rotary drive device further includes a lifting device, which can make the axis of the pipe body form a preset angle with the horizon, so as to lift one side of the grouting port of the steel pipe.

[0024] In a third aspect, a processing technology for a spiral cavity steel pipe filled with concrete is provided, wherein the processing technology processes the spiral cavity steel pipe filled with concrete as described above, comprising the steps of:

[0025] Make the tube rotate around its own axis; and

[0026] Concrete is injected into the spiral cavity of the pipe body from one end of the pipe body.

[0027] In one of the embodiments, the step of causing the tube body to rotate about the axis line further includes: raising one side of the grouting port of the tube body.

[0028] In one embodiment, after the concrete is discharged from the exhaust and drainage outlet of the steel pipe, the injection of concrete is stopped, and the grouting port and the exhaust and drainage outlet are closed.

[0029] In one of the embodiments, the step of injecting concrete into the spiral cavity of the tube body from one end of the tube body includes: adjusting the flow rate of the concrete injected into the spiral cavity so that the concrete does not fill the entire spiral cavity.

[0030] In one of the embodiments, the step of injecting concrete into the spiral cavity of the tube body from one end of the tube body includes: adjusting the rotation speed of the tube body to a preset speed range, within which the concrete in the spiral cavity continuously adheres to the inner wall of the outer tube of the tube body in the circumferential direction, and a gap is formed between the concrete and the outer wall of the inner tube.

[0031] The present invention application has the following technical effects:

[0032] 1) Improve concrete filling efficiency: Under the dual effects of centrifugal force and gravity, the flow and filling of concrete in the spiral cavity are smoother, which helps to improve the filling efficiency. Centrifugal force can help overcome the resistance in the flow of concrete, so that the concrete can fill the inner cavity of the steel pipe from the end of the steel pipe body at the other end of the grouting port to one end of the grouting port more quickly.

[0033] 2) Reduce bubbles and hollows: Due to the centrifugal force, during the concrete filling process, the concrete sticks to the outside of the cavity and forms a gap with the inner wall of the cavity for air circulation. The air in the cavity will be discharged in the reverse direction to form an unobstructed exhaust channel. This process helps to reduce bubbles inside the concrete, avoid hollows and delamination caused by bubbles, and thus improve the density and overall performance of the concrete.

[0034] 3) Low-pressure filling: During the filling process, due to the effect of centrifugal force, the pressure of the concrete fluid in the steel pipe cavity is maintained at a low level, avoiding the risk of bulging or deformation of the pipe wall due to excessive pressure.

[0035] 4) Simplify the pipe structure: Since the air and excess water can be smoothly discharged from the exhaust and drainage holes at the end of the steel pipe during the concrete filling process, there is no need to set additional air outlets and water discharge holes on the circumferential surface of the pipe body, which simplifies the structural design of the pipe body.

[0036] 5) Promote air discharge: The design of raising the steel pipe body on one side of the grouting port is conducive to the flow and compaction of concrete in the cavity, and is also conducive to the discharge of air, further improving the filling quality of concrete and the stability of the structure.

[0037] 6) Vibration compaction effect: The vibration generated by the steel pipe body during rotation can play a vibrating role, which helps to discharge and compact the bubbles inside the concrete, and improve the strength and durability of the concrete.

[0038] 7) Solve the problem of filling sharp corners: This technology can effectively solve the problem of difficult filling of sharp corners between the annular sealing plate and the spiral ring at the end of the steel pipe body, ensuring that concrete can be evenly filled into every corner and filled more fully.

[0039] 8) Production line matching: This technology can be easily combined with other processes such as steel pipe cutting, welding, anti-corrosion treatment, etc. to form a matching production line to achieve automated and continuous production and improve overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG. 1 is a schematic structural diagram of a steel pipe not filled with concrete in one embodiment of the present application.

[0041] FIG. 2 is a schematic diagram of the structure of a steel pipe when the outer pipe is a corrugated pipe in an embodiment of the present application.

[0042] FIG. 3 is an enlarged schematic partial cross-sectional view of point A in FIG. 2 .

[0043] FIG. 4 is a schematic structural diagram of a steel pipe connection processing device in an embodiment of the present application.

[0044] FIG. 5 is a schematic side view of a steel pipe connection processing device in an embodiment of the present application.

[0045] FIG. 6 is a schematic diagram of a process of filling concrete in an embodiment of the present application.

[0046] FIG. 7 is a schematic diagram of a process of filling concrete from another perspective in an embodiment of the present application.

[0047] Description of Figure Numbers:

[0048] 100, steel pipe; 101, axis line; 110, pipe body; 111, outer pipe; 112, inner pipe; 113, spiral cavity; 120, spiral ring plate; 130, ring-shaped 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, rotating pipe joint; 241, fixing part; 250, exhaust pipe; 251, exhaust valve; 260, rotating drive device. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0050] 1-7 , FIG. 1 shows a schematic structural diagram of a spiral cavity steel pipe 100 not filled with concrete 140 in an embodiment of the present application, and FIGS. 2-6 are schematic diagrams of a spiral cavity steel pipe 100 filled with concrete 140 in an embodiment of the present application.

[0051] The steel pipe 100 provided in one embodiment of the present application includes 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, and the outer pipe 111 is sleeved on the inner pipe 112 at intervals to form a receiving cavity between the inner pipe 112 and the outer pipe 111. The spiral ring plate 120 is arranged in the receiving cavity, the inner periphery of the spiral ring plate 120 is connected to the outer surface of the inner pipe 112, the outer periphery of the spiral ring plate 120 is connected to the inner surface of the outer pipe 111, and the spiral ring plate 120 divides the receiving cavity into a spiral cavity 113. The concrete 140 is arranged in the spiral cavity 113, and the concrete 140 is injected into the spiral cavity 113 from one end of the pipe body 110 by the rotation of the pipe body 110 around the axis 101.

[0052] Through the self-rotation of the tube body 110, under the dual effects of centrifugal force and gravity, the flow and filling of the concrete 140 in the spiral cavity are smoother, which helps to improve the filling efficiency; the centrifugal force can help overcome the resistance of the concrete 140 in the flow process, so that the concrete 140 can fill the inner cavity of the steel pipe 100 faster. Due to the effect of centrifugal force, the gas in the cavity is more easily discharged during the filling process of the concrete 140. This process helps to reduce the bubbles inside the concrete 140, avoid hollowing and delamination caused by bubbles, thereby improving the density and overall performance of the concrete 140 and forming a smooth exhaust channel. The pressure in the cavity of the steel pipe 100 is kept at a low level, avoiding the risk of bulging or deformation of the pipe wall due to excessive pressure. The vibration generated by the steel pipe 100 body 110 during the rotation process can play a vibrating role, which helps to discharge and compact the bubbles inside the concrete 140, and improve the strength and durability of the concrete 140. This technology can effectively solve the problem that the sharp corners between the annular sealing plate and the spiral ring at the end of the steel pipe 100 body 110 are difficult to fill, ensuring that the concrete 140 can be evenly filled into every corner and filled more fully. This technology can easily form a matching production line with other processes such as cutting, welding, and anti-corrosion treatment of the steel pipe 100, realize automated and continuous production, and improve overall construction efficiency.

[0053] In one embodiment, the axis 101 of the pipe body 110 is at a preset angle to the horizon, so that one side of the grouting port of the steel pipe is raised. The horizon is defined as the horizontal placement surface of the pipe body 110 during operation. The axis 101 of the pipe body 110 is at a preset angle to the horizon, that is, the pipe body 110 is inclined relative to the horizontal placement surface. The preset angle is 5-30°. Preferably, the preset angle can be, for example, 5°, 8°, 10°, 15°, or 20°.

[0054] For the double-layer steel pipe 100 with a spiral cavity 113, after research, there are two processing methods that can be used, one is the "jacking method" and the other is the "horizontal method". The jacking method is to first seal the interlayers at both ends of the pipe body 110 with a plugging ring, stand the pipe body 110 upright, and inject grout from the grouting port 131 on the bottom end of the plugging ring of the pipe body 110. The concrete 140 is a self-leveling fine stone concrete 140 with good fluidity. Grouting is continued until the slurry is discharged from the slurry outlet at the top of the pipe, and then the filling is stopped and solidified, and no pores and void layers will be generated. However, the construction safety of erecting the pipe body 110 is poor, and when the pipe body 110 is long, the grouting pressure is large, which is easy to cause the bottom end pipe wall to bulge and deform, and the yield rate is low. In addition, the height requirement for the factory building is too high. The "horizontal method" is to place the pipe body 110 horizontally and fill the spiral cavity 113 with concrete 140. This method requires opening an exhaust hole and a water discharge hole above each spiral cavity of the pipe body 110. The filling method is complicated, and after the filling is completed, each hole must be welded and sealed and secondary anti-corrosion is performed, and there are many processes. The welding and sealing of each hole is also a difficult point in quality control. The pipe body 110 that is appropriately tilted at a preset angle can effectively avoid excessive occupation of the processing space, avoid excessive grouting pressure causing local bulging of the pipe wall, and also avoid the process of opening multiple holes in the pipe body 110 and then sealing it, avoiding affecting the structural strength of the pipe body 110. The design of raising the steel pipe 100 on one side of the grouting port 131 is conducive to the flow and compaction of the concrete 140 in the cavity. The pipe body 110 that is appropriately tilted at a preset angle is also easier to make the gas move obliquely upward along the outer tube 111 and discharge the steel pipe 100 when rotating, further improving the filling quality of the concrete 140 and the stability of the structure.

[0055] In one embodiment, the rotation direction of the tube body 110 around the axis 101 is opposite to the spiral advancement direction of the spiral ring plate 120. That is, in the side cross-sectional view shown in the figure, when the spiral advancement direction of the spiral ring plate 120 is perpendicular to the paper surface, the tube body 110 should rotate clockwise around the axis 101, and at this time, the concrete 140 slurry can move deeper along the spiral ring plate 120 under the centrifugal force, gravity and conveying drive.

[0056] In one embodiment, the outer tube 111 is a straight tube, or the outer tube 111 is a corrugated tube. The straight tube is a cylindrical tubular structure formed by a straight steel plate. The corrugated tube is a cylindrical tubular structure formed by a corrugated steel plate and having corrugated protrusions and depressions on the outer surface. As shown in Figures 2 and 3, when the outer tube 111 is a corrugated tube, the corrugations of the corrugated tube are spiral, and the troughs of the corrugations of 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.

[0057] The inner tube 112 is a straight tube, or the inner tube 112 is a corrugated tube. The corrugated shape of the inner tube 112 may correspond to the appearance, and the inner wall of the inner tube 112 forms an inner cavity as the inner cavity of the steel tube 100.

[0058] In one embodiment, the steel pipe 100 further includes an annular sealing plate 130, which is disposed at both ends of the inner tube 112 and the outer tube 111, and at least one of the annular sealing plates 130 is provided with a grouting port 131 and an exhaust and drainage port 132 both of which are connected to the outside.

[0059] Specifically, the annular plugging serves as two end faces of the steel pipe 100 to block the accommodating cavity. Preferably, only the annular plugging plate 130 at one end of the steel pipe 100 is provided with a grouting port 131. Looking toward the direction of the pipe body 110 from the side where the grouting port 131 is provided, as shown in FIGS. 5 and 6 , the pipe body 110 should rotate in a counterclockwise direction, and the concrete 140 slurry can enter from the grouting port 131 and move toward a deeper direction.

[0060] The grouting port 131 and the exhaust and drainage port 132 are arranged at intervals to prevent the newly injected concrete 140 slurry from being directly discharged. Preferably, the exhaust and drainage port 132 is located at a position where the annular plug is closer to the inner tube 112, for example, the exhaust and drainage port 132 is located within 20% of the minimum distance between the inner tube 112 and the outer tube 111, so that the slurry can be more fully accumulated starting from the outer tube 111. Preferably, the grouting port 131 is located at a position where the annular plug is closer to the inner tube 112, for example, the grouting port 131 is located within 20% of the minimum distance between the inner tube 112 and the outer tube 111, so that the slurry can be more fully accumulated starting from the outer tube 111. Multiple grouting ports 131 and exhaust and drainage ports 132 can be provided.

[0061] Since the grouting port 131 and the exhaust and drainage 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 the concrete 140. Therefore, there is no need to set additional exhaust and drainage 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.

[0062] In one embodiment, the concrete 140 is dry hard concrete 140, and an expansion agent may be contained in the concrete 140. When the dry hard concrete 140 is used, due to its low slump, when the grouting port 131 pipe is removed after filling, the concrete 140 can be self-shaped and is not easy to flow, thereby avoiding the formation of hollows in the port, and ensuring the compactness and uniformity of the concrete 140 filling.

[0063] 4-5 show schematic diagrams of a processing device 200 for filling concrete 140 in an embodiment of the present application, wherein the processing device 200 is used to process the spiral cavity steel pipe 100 filled with concrete 140 as described above, and the processing device 200 includes a concrete conveying device 230, a pipeline assembly, and a rotary drive device, wherein the concrete conveying device 230 is used to convey concrete 140 to the steel pipe 100, and the pipeline assembly includes a pipeline connected to the concrete conveying device 230 and the spiral cavity 113, and a valve provided on the pipeline. The rotary drive device 260 is connected to the steel pipe 100 in a transmission manner, and the rotary drive device is used to hold up the pipe body and drive the pipe body to rotate around the axis.

[0064] In one embodiment, the discharge port of the concrete conveying device 230 is located on the axis 101 , and the pipeline assembly is connected between the discharge port and the spiral cavity 113 .

[0065] In one embodiment, the pipeline assembly includes a first pipeline 210 and a second pipeline 220, the first pipeline 210 is connected between the second pipeline 220 and the spiral cavity 113, the second pipeline 220 is connected between the first pipeline 210 and the discharge port, and the second pipeline 220 is arranged along the axis 101.

[0066] In one embodiment, the first pipe 210 and the second pipe 220 are rotatably connected via a rotating pipe joint 240, and the first pipe 210 rotates around the second pipe 220 as the pipe body 110 rotates. Specifically, a rotating structure is provided in the rotating pipe joint 240, so that the connection structures at both ends can directly rotate relative to each other. The two ends of the rotating 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 rotating pipe joint 240 is fixed at a preset position by a fixing member 241.

[0067] In one embodiment, the first pipe 210 is provided in plurality, and each of the first pipes 210 corresponds to an independent spiral cavity 113. Accordingly, there are multiple discharge ports, each of which corresponds to one first pipe 210, and at least one discharge port corresponds to an independent spiral cavity 113. When the first pipe 210 is provided in plurality, the rotary pipe joint 240 is a one-to-many structure, and the rotary pipe joint 240 has a fixed body with an inlet, a rotatable body, and a plurality of outlets on the rotatable body. The fixed body is fixed at a preset position by a fixing member 241.

[0068] A grouting valve 211 is further provided between the first pipeline 210 and the grouting port 131. The processing equipment 200 further includes an exhaust pipe 250 provided at the exhaust and drainage port 132, and an exhaust valve 251 is provided between the exhaust and drainage port 132 and the exhaust pipe 250.

[0069] In one embodiment, the first pipe 210 is made of a flexible material, such as a rubber hose, a polyurethane hose, a PVC hose, etc. Preferably, the first pipe 210 is a rubber hose.

[0070] In one embodiment, the cross-sectional area of ​​the first pipe 210 is smaller than the cross-sectional area of ​​the corresponding spiral cavity 113. Specifically, the diameter of the first pipe 210 is smaller than or equal to the width of the entrance of the spiral cavity 113.

[0071] In one embodiment, the processing equipment 200 further includes a limiting device, and the limiting device is used to limit the axial movement of the tube body 110 .

[0072] The rotary drive device 260 is disposed at the bottom of the steel pipe 100 . The rotary drive device 260 is connected to the outer pipe 111 in transmission and can abut against the outer wall of the outer pipe 111 . The rotary drive device 260 rotates and drives the outer pipe 111 to rotate through friction.

[0073] In one embodiment, the rotary drive device 260 also includes a lifting device, which is movably connected to the pipe body 110. The lifting device can make the axis of the pipe body 110 form a preset angle with the horizon, and the lifting device lifts one end of the steel pipe 100 having the grouting port 131.

[0074] The limiting device and the lifting device are an integrated structure, which can axially fix the outer tube 111 and simultaneously lift one end with the grouting port 131, so that the tube body 110 is tilted and does not move in the axial direction.

[0075] In one of the embodiments, the rotary drive device is provided with a vibration mechanism, and the vibration mechanism is used to vibrate the steel pipe.

[0076] 6-7 show a schematic diagram of a process of processing a spiral cavity steel pipe 100 filled with concrete 140 in an embodiment of the present application. The processing process processes the spiral cavity steel pipe 100 filled with concrete 140 as described above. The processing process includes the following steps:

[0077] S100, causing the tube body 110 to rotate around the axis 101; and

[0078] S200 , injecting concrete 140 into the spiral cavity 113 of the tube body 110 from one end of the tube body 110 .

[0079] In one embodiment, the step of rotating the tube body 110 around the axis line 101 further includes: raising one side of the grouting port of the tube body 110 to rotate the tube body 110 around the axis line 101 at a preset angle to the horizon.

[0080] In one embodiment, after the concrete 140 is discharged from the exhaust and drainage port 132 of the steel pipe 100 , the injection of the concrete 140 is stopped, and the grouting port 131 and the exhaust and drainage port 132 are closed.

[0081] In one embodiment, the step of injecting concrete from one end of the tube body 110 into the spiral cavity 113 of the tube body 110 includes: adjusting the flow rate of the concrete injected into the spiral cavity 113 so that the concrete does not fill the entire spiral cavity 113. Specifically, not filling the entire spiral cavity 113 can be defined as that the ratio of the volume of the injected concrete to the total volume of the spiral cavity 113 is less than or equal to 80%, and in particular, can be less than or equal to 70% or 60%.

[0082] In one embodiment, the step of injecting concrete from one end of the tube body 110 into the spiral cavity 113 of the tube body 110 includes: adjusting the rotation speed of the tube body 110 to a preset speed range, within which the concrete in the spiral cavity 113 continuously adheres to the inner wall of the outer tube 111 of the tube body in the circumferential direction, and a gap is formed between the concrete and the outer wall 111 of the inner tube. Continuous adherence in the circumferential direction means that, over at least a certain length of the outer tube 111, the concrete can adhere to the inner wall of the outer tube 111 at 360°, forming a concrete fluid layer that continuously covers the circumferential direction.

[0083] The processing technology using the above processing equipment 200 is as follows.

[0084] After the various devices and parts in the processing equipment 200 are installed, the driving device 260 is started to rotate the steel pipe 100 body 110 around the inclined axis 101, the steel pipe 100 body 110 starts to rotate, and the first pipeline 210 starts to rotate with the steel pipe 100 body. The rotation direction of the steel pipe 100 body 110 is opposite to the spiral advancement direction of the spiral ring plate 120 of the steel pipe 100.

[0085] The concrete conveying device 230 is started, and the concrete 140 is injected into the spiral cavity of the tube body 110 of the steel pipe 100 through the second pipe 220, the rotating pipe joint 240, and the first pipe 210. The rotation speed of the tube body 110 of the steel pipe 100 is configured to ensure that the centrifugal force generated by it presses the concrete 140 against the inner wall of the outer tube 111 of the steel pipe 100, and leaves a gap between the concrete 140 and the outer wall of the inner tube wall of the steel pipe 100, as shown in Figures 6 and 7.

[0086] Under the action of centrifugal force, the concrete 140 is pressed against the inner wall of the outer tube 111 and spreads around on the wall surface. The helical angle of the spiral ring moves the spreading direction of the concrete 140 forward. In addition, since the steel pipe 100 body 110 on one side of the grouting port 131 is raised, the concrete 140 in the spiral cavity moves to the other end of the steel pipe 100 body 110 under the action of gravity until it reaches the end of the other end, gradually filling the end cavity.

[0087] During this process, the air in the spiral cavity is reversely squeezed out through the gap between the concrete 140 in the cavity and the inner tube wall, and discharged from the exhaust and drainage port 132 of the tube body 110 of the steel tube 100 on one side of the grouting port 131 .

[0088] When the cavity is completely filled with concrete 140 and the concrete 140 slurry is discharged from the exhaust hole, the grouting valve 211 and the exhaust valve 251 are closed, and the concrete conveying device 230 is closed.

[0089] After waiting for the concrete 140 to dry, the steel pipe 100 is made, and a plurality of steel pipes 100 are welded to form a pipeline. Adjacent steel pipes 100 can be welded in a spiral shape, and a spiral weld is formed on the pipeline after welding.

[0090] In the above process, the flow rate and flow rate of the concrete 140 in the first pipe 210 must ensure that the concrete 140 does not fill the entire cross-section of the cavity under the action of centrifugal force after entering the spiral cavity.

[0091] In the above process, the vibration of the tube body 110 of the steel tube 100 during rotation has a vibration compacting effect on the concrete 140 in the spiral cavity 113, making the concrete 140 gradually dense.

[0092] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0093] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0094] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0095] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0096] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0097] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A spiral cavity steel pipe filled with concrete, characterized in that: The steel pipe comprises: The tube body comprises an inner tube and an outer tube, wherein the outer tube is sleeved outside the inner tube to form a receiving cavity between the inner tube and the outer tube; a spiral ring plate, disposed in the accommodating cavity, wherein the inner circumference of the spiral ring plate is connected to the outer surface of the inner tube, the outer circumference of the spiral ring plate is connected to the inner surface of the outer tube, and the spiral ring plate divides the accommodating cavity into spiral cavities; and Concrete is arranged in the spiral cavity, and the concrete is injected into the spiral cavity from one end of the tube body by rotating the tube body around its own axis.

2. The spiral cavity steel pipe filled with concrete according to claim 1, characterized in that: The rotation direction of the tube body around the axis is opposite to the spiral advancement direction 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 a straight tube, or the outer tube is 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 arranged 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 and drainage port both connected to the outside.

5. A processing device for filling concrete, characterized in that: The processing equipment is used to process the spiral cavity steel pipe filled with concrete as claimed in any one of claims 1 to 4, and the processing equipment includes: A concrete conveying device, used for conveying concrete to the spiral cavity of the steel pipe; A pipeline assembly, comprising a pipeline connected to the concrete conveying device and the spiral cavity and a valve arranged on the pipeline; and A rotation driving device is used to hold up the tube body and drive the tube body to rotate around the axis.

6. The processing equipment for filling concrete according to claim 5, characterized in that The pipeline assembly includes a first pipeline and a second pipeline, the first pipeline is connected between the second pipeline and the spiral cavity, the second pipeline is connected between the first pipeline and the concrete conveying device, and the second pipeline is arranged along the axis.

7. The processing equipment for filling concrete according to claim 6, characterized in that The first pipeline and the second pipeline are rotatably connected via a rotating pipe joint, and the first pipeline rotates around the axis of the second pipeline as the pipe body rotates.

8. The processing equipment for filling concrete according to claim 6, characterized in that There are multiple first pipes, and each of the first pipes corresponds to an independent spiral cavity.

9. The processing equipment for filling concrete according to claim 6, characterized in that: The first pipe is made of flexible material.

10. The processing equipment for filling concrete according to any one of claims 6 to 9, characterized in that: The cross-sectional area of ​​the first pipe is smaller than the cross-sectional area of ​​the corresponding spiral cavity.

11. The processing equipment for filling concrete according to claim 5, characterized in that The processing equipment also includes a limiting device, which is used to limit the axial movement of the tube body.

12. The processing equipment for filling concrete according to claim 5, characterized in that The rotation drive device is provided with a vibration mechanism, and the vibration mechanism is used to vibrate the steel pipe.

13. The processing equipment for filling concrete according to claim 5, characterized in that The rotary drive device also includes a lifting device, which can make the axis of the pipe body form a preset angle with the horizon, so as to lift one side of the grouting port of the steel pipe.

14. A processing technology for a spiral 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 to 4, comprising the steps of: Make the tube rotate around its own axis; and Concrete is injected into the spiral cavity of the pipe body from one end of the pipe body.

15. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 14, characterized in that: The step of causing the tube body to rotate about the axis also includes: raising one side of the grouting port of the tube body.

16. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 14, characterized in that: After the concrete is discharged from the exhaust and drainage outlet of the steel pipe, the injection of concrete is stopped, and the grouting port and the exhaust and drainage outlet are closed.

17. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 14, characterized in that: The step of injecting concrete into the spiral cavity of the pipe body from one end of the pipe body comprises: adjusting the flow rate of the concrete injected into the spiral cavity so that the concrete does not fill the entire spiral cavity.

18. The processing technology of the spiral cavity steel pipe filled with concrete according to claim 14, characterized in that: The step of injecting concrete into the spiral cavity of the tube body from one end of the tube body comprises: adjusting the rotation speed of the tube body to a preset speed range, within which the concrete in the spiral cavity continuously adheres to the inner wall of the outer tube of the tube body in the circumferential direction, and a gap is formed between the concrete and the outer wall of the inner tube.

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