Spiral cavity steel pipe filled with concrete and processing equipment for filling concrete

Abstract

The utility model relates to a spiral cavity steel pipe filled with concrete 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 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 composite structure, in particular to a spiral cavity concrete-filled steel pipe and a processing equipment for filling concrete. BACKGROUND

[0002] The concrete-filled steel pipe structure with pipe wall sandwich cavity is a special pipe structure, that is, concrete is poured into the steel pipe and tamped to increase the strength and stiffness of the steel pipe structure, which has unique mechanical properties and application advantages. The compressive strength of concrete is high, but the bending resistance is weak, while the bending resistance of steel, especially profiled steel, is strong and has good elastic-plasticity, but it is easy to lose stability and axial compressive capacity under pressure. The steel pipe concrete can combine the advantages of both in structure, which can greatly improve the mechanical properties. Steel and concrete composite structure has been applied in practical engineering projects and shows good performance.

[0003] In the traditional technology, the process of filling concrete into the steel pipe is complicated, especially the filling of concrete in the inner cavity between the double-layer steel pipes. Because the pipe is long in length, the cavity between the inner and outer layers is narrow and spiral, which increases the difficulty of filling process and reduces the yield of finished products. In particular, the double-layer steel pipe with spiral cavity developed by the applicant has higher strength, but it also faces the problems of inconvenient processing and low processing efficiency. Practical new type content

[0004] Therefore, it is necessary to provide a spiral cavity concrete-filled steel pipe and a processing equipment for filling concrete with simplified process, high processing yield and high processing efficiency.

[0005] In a first aspect, a spiral cavity concrete-filled steel pipe is provided, which comprises:

[0006] a pipe body comprising an inner pipe and an outer pipe, the outer pipe being sleeved outside the inner pipe to form a containing cavity between the inner pipe and the outer pipe;

[0007] a spiral ring plate arranged in the containing cavity, the inner periphery of the spiral ring plate being connected to the outer surface of the inner pipe, the outer periphery of the spiral ring plate being connected to the inner surface of the outer pipe, and the spiral ring plate dividing the containing cavity into a spiral cavity; and

[0008] concrete arranged in the spiral cavity, the concrete being injected into the spiral cavity from one end of the pipe body by rotating the pipe body around its axis.

[0009] In one embodiment, the rotation direction of the pipe body around the axis is opposite to the helical advancing direction of the helical ring plate.

[0010] In one embodiment, the outer pipe is a straight pipe, or the outer pipe is a wavy pipe.

[0011] In one embodiment, the steel pipe further comprises a ring-shaped sealing plate arranged at both ends of the inner pipe and the outer pipe, at least one of the ring-shaped sealing plates is provided with a grouting port and an exhaust and drainage port, both of which are in communication with the outside.

[0012] In a second aspect, a processing device for filling concrete is provided, the processing device is used for processing the helical cavity steel pipe for filling concrete as described above, and the processing device comprises:

[0013] a concrete conveying device for conveying concrete to the helical cavity of the steel pipe;

[0014] a pipe assembly comprising a pipe in communication with the concrete conveying device and the helical cavity, and a valve arranged in the pipe; and

[0015] a rotating driving device drivingly connected to the steel pipe, the rotating device being used for lifting the pipe body and driving the pipe body to rotate around the axis.

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

[0017] In one embodiment, the first pipe and the second pipe are rotationally connected through a rotating pipe joint, and the first pipe rotates around the axis of the second pipe when the pipe body rotates.

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

[0021] In one embodiment, the processing device further comprises a limiting device for limiting the axial movement of the pipe body.

[0022] In one of the embodiments, the rotating driving device is provided with a vibrating mechanism for vibrating the steel pipe.

[0023] In one of the embodiments, the rotating driving device further comprises a lifting device capable of lifting the side of the grouting opening of the steel pipe to a preset angle with the ground level.

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

[0025] rotating the pipe body around its axis; and

[0026] injecting concrete into the spiral cavity of the pipe body from one end of the pipe body.

[0027] In one of the embodiments, the step of rotating the pipe body around its axis further comprises lifting the side of the grouting opening of the pipe body.

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

[0029] In one of the embodiments, the step of injecting concrete into the spiral cavity of the pipe body from one end of the pipe body comprises adjusting the flow 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 pipe body from one end of the pipe body comprises adjusting the rotation speed of the pipe body to a preset speed range, in which the concrete in the spiral cavity continuously adheres to the inner wall of the outer pipe of the pipe body in the circumferential direction, and the concrete forms a gap with the outer wall of the inner pipe.

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

[0032] 1) Improve the filling efficiency of concrete: under the dual action of centrifugal force and gravity, the flow and filling of concrete in the spiral cavity are more smooth, which helps to improve the filling efficiency. Centrifugal force can help overcome the resistance in the flow process of concrete, so that the concrete can gradually fill the inner cavity of the steel pipe from the end of the pipe body on the other side of the grouting opening to the end of the grouting opening.

[0033] 2) Reduce air bubbles and hollowing: due to the action of centrifugal force, during the concrete filling process, the concrete is attached to the outside of the cavity, and a gap is formed with the inner wall of the cavity, which can make the air flow. The air in the cavity will be discharged in the opposite direction, forming a smooth exhaust passage. This process helps to reduce the air bubbles in the concrete, avoid the air bubbles caused by the hollowing and delamination phenomenon, so as to improve the density and overall performance of the concrete.

[0034] 3) Low pressure filling: during the filling process, due to the action of centrifugal force, the pressure of concrete fluid in the steel pipe cavity is kept at a low level, avoiding the risk of pipe wall bulging or deformation caused by high pressure.

[0035] 4) Simplify the structure of the pipe body: because 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, the circumferential surface of the pipe body does not need to be provided with additional air outlet and water seepage discharge holes, which simplifies the structure design of the pipe body.

[0036] 5) Promote air discharge: the design of lifting the steel pipe body on one side of the grouting port is conducive to the flow and compaction of the concrete in the cavity, and also conducive to the discharge of air, further improving the filling quality of the 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 role in vibration, which helps to discharge and compact the air bubbles in the concrete, and improve the strength and durability of the concrete.

[0038] 7) Solve the filling problem of sharp corner position: this technology can effectively solve the problem of filling the sharp corner position between the annular sealing plate and the spiral ring at the end of the steel pipe body, and ensure that the concrete can be uniformly filled into every corner, and the filling is more sufficient.

[0039] 8) Production line matching: this technology is easy to form a matched production line with other processes such as cutting, welding and corrosion prevention treatment of steel pipe, realize automatic and continuous production, and improve the overall construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a structural schematic diagram of a steel pipe without filled concrete in an embodiment of the present application.

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

[0042] Figure 3 is Figure 2 is a local enlarged sectional view of position A in FIG.

[0043] Figure 4 is a structural schematic diagram of a steel pipe connecting processing equipment in an embodiment of the present application.

[0044] Figure 5 It is a side view schematic diagram of the steel pipe connection processing equipment in one embodiment of the present application.

[0045] Figure 6 Schematic diagram of the concrete filling process in one embodiment of the present application.

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

[0047] Description of Figure Numbers:

[0048] 100. Steel pipe; 101. Axis 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 part; 250. Exhaust pipe; 251. Exhaust valve; 260. Rotary drive device. DETAILED DESCRIPTION

[0049] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0050] See Figures 1-7 , Figure 1 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. Figures 2-6 Schematic diagram of a spiral cavity steel pipe 100 filled with concrete 140 in one embodiment of the present application.

[0051] The steel pipe 100 provided by an embodiment of the present application comprises a pipe body 110, a spiral ring plate 120, and concrete 140. The pipe body 110 comprises 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 an accommodating cavity between the inner pipe 112 and the outer pipe 111. The spiral ring plate 120 is arranged in the accommodating 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 accommodating cavity into a spiral cavity 113. The concrete 140 is arranged in the spiral cavity 113 and is injected into the spiral cavity 113 from one end of the pipe body 110 in a way that the pipe body 110 rotates around the axis 101.

[0052] Through the rotation of the pipe body 110, the flow and filling of the concrete 140 in the spiral cavity are smoother under the double action of the centrifugal force and the gravity, which helps to improve the filling efficiency. The centrifugal force can help to overcome the resistance in the flow process of the concrete 140, so that the concrete 140 can fill the inner cavity of the steel pipe 100 more quickly. Due to the action of the centrifugal force, the gas in the cavity is more easily excluded during the filling process of the concrete 140, which helps to reduce the air bubbles in the concrete 140, avoids the hollowing and delamination phenomenon caused by the air bubbles, and thus improves the density and overall performance of the concrete 140, forming a smooth exhaust passage. 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 caused by excessive pressure. The vibration generated by the pipe body 110 of the steel pipe 100 during rotation can play a vibrating role, helping to expel the air bubbles and compact the concrete 140 inside, and improving the strength and durability of the concrete 140. This technology can effectively solve the problem of difficult filling at the sharp corner between the annular sealing plate and the spiral ring at the end of the pipe body 110 of the steel pipe 100, and ensure that the concrete 140 can be uniformly filled into every corner and the filling is more sufficient. This technology is easy to form a complete production line with other processes such as cutting, welding, and corrosion protection of the steel pipe 100, to realize automatic and continuous production and improve the overall construction efficiency.

[0053] In one of the embodiments, the axis 101 of the pipe body 110 is at a preset angle with the horizon, so that one side of the grouting port of the steel pipe is elevated. The horizon is defined as the horizontal placement surface when the pipe body 110 is operated, and the axis 101 of the pipe body 110 is at a preset angle with the horizon, i.e. the pipe body 110 is arranged in an inclined manner relative to the horizontal placement surface. The preset angle is 5-30°, and as a preferred example, the preset angle can be 5°, 8°, 10°, 15°, or 20°.

[0054] For the double-layer steel pipe 100 with the spiral cavity 113, two processing methods can be used, one is "jacking method", and the other is "horizontal method". The jacking method is to first seal the interlayer at both ends of the pipe body 110 with a sealing ring, to vertically place the pipe body 110, to inject the grout from the grout injection port 131 on the sealing ring at the bottom end of the pipe body 110, and to continuously inject the grout until the grout is discharged from the grout outlet port at the top of the pipe, that is, to stop filling, and to solidify, so that no air holes and empty layers are generated. However, the vertical construction of the pipe body 110 has poor safety, and when the pipe body 110 is long, the grout injection pressure is large, the bottom end of the pipe body 110 is easily deformed due to the bulging of the pipe wall, and the yield is low. In addition, the height requirement of the factory building is too high. The horizontal method is to horizontally place the pipe body 110 and to fill the concrete 140 into the spiral cavity 113. This method needs to open an exhaust hole and a water seepage discharge hole above each spiral cavity of the pipe body 110. The filling method is complex, and after the filling is completed, each hole needs to be welded and sealed and subjected to secondary corrosion protection, so that the process is complicated, and the welding and sealing of each hole are difficult to control. The pipe body 110 appropriately inclined at a preset angle can effectively avoid the excessive occupation of the processing space, avoid the local bulging of the pipe wall due to the excessive grout injection pressure, avoid the process of opening and sealing multiple holes in the pipe body 110, avoid the influence on the structural strength of the pipe body 110, and the design that the grout injection port 131 side of the pipe body 110 of the steel pipe 100 is lifted is beneficial to the flow and compaction of the concrete 140 in the cavity. The pipe body 110 appropriately inclined at a preset angle is more easily moved along the outer pipe 111 in an inclined upward direction and discharged from the steel pipe 100 when rotating, so as to further improve the filling quality of the concrete 140 and the stability of the structure.

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

[0056] In one embodiment, the outer pipe 111 is a straight pipe, or the outer pipe 111 is a wave-shaped pipe. The straight pipe is a tubular structure in a cylindrical shape surrounded by a flat steel plate. The wave-shaped pipe is a tubular structure in a cylindrical shape with a wave-shaped convex and concave outer surface surrounded by a corrugated steel plate. For example, Figure 2 、 3As shown, when the outer tube 111 is a wave-shaped tube, the corrugation of the wave-shaped tube is helical, and the valleys of the corrugation 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 welds can serve as the helical ring plates 120. In this case, the height of the helical ring plates 120 is extremely small, and the helical cavities 113 are formed between the adjacent welds and the inner tube 112.

[0057] The inner tube 112 is a straight tube, or the inner tube 112 is a wave-shaped tube. The corrugation of the inner tube 112 can correspond to the outer tube 111. The inner wall of the inner tube 112 forms an inner cavity, which is the inner cavity of the steel pipe 100.

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

[0059] Specifically, the annular sealing plates serve as the two end faces of the steel pipe 100, sealing the accommodation cavities. As preferred, only the annular sealing plate 130 at one end of the steel pipe 100 is provided with the grouting port 131. As shown in Figure 5 、 6 The pipe body 110 should rotate counterclockwise, and the concrete 140 slurry can move in a deeper direction from the grouting port 131.

[0060] The grouting port 131 and the exhaust and drainage port 132 are arranged at intervals to prevent the freshly injected concrete 140 slurry from being directly discharged. As preferred, the exhaust and drainage port 132 is located closer to the inner tube 112 on the annular sealing plate, 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, facilitating more sufficient accumulation of the slurry from the outer tube 111. As preferred, the grouting port 131 is located closer to the inner tube 112 on the annular sealing plate, for example, the grouting port 131 is located within 20% of the minimum distance between the inner tube 112 and the outer tube 111, facilitating more sufficient accumulation of the slurry from the outer tube 111. The grouting port 131 and the exhaust and drainage port 132 can be provided with multiple ports.

[0061] Since the grouting port 131 and the exhaust and drainage port 132 are located on the annular sealing plate, air and moisture can be smoothly discharged from one end of the steel pipe 100 during the filling of the concrete 140, and therefore the circumferential surface of the pipe body 110 does not need to be provided with additional exhaust and drainage ports 132 and water seepage discharge holes, simplifying the structural design of the pipe body 110.

[0062] In one embodiment, the concrete 140 is a dry concrete 140, and the concrete 140 can contain an expansive agent. When the dry concrete 140 is used, because of its low slump, the concrete 140 can self-form when the pipe 131 is filled and removed, and the concrete 140 is less likely to flow, thereby avoiding the formation of air pockets in the mouth, and ensuring the compactness and uniformity of the concrete 140.

[0063] Figures 4-5 A schematic diagram of a processing device 200 for processing the spiral cavity steel pipe 100 filled with the concrete 140 is shown, the processing device 200 is used for processing the spiral cavity steel pipe 100 filled with the concrete 140 as described above, the processing device 200 includes a concrete delivery device 230, a pipe assembly, and a rotating drive device. The concrete delivery device 230 is used for delivering the concrete 140 to the steel pipe 100, the pipe assembly includes a pipe connected to the concrete delivery device 230 and the spiral cavity 113, and a valve provided in the pipe. The rotating drive device 260 is drivingly connected to the steel pipe 100, and the rotating drive device is used for lifting the pipe body and driving the pipe body to rotate around the axis.

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

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

[0066] In one embodiment, the first pipe 210 and the second pipe 220 are rotatably connected through a rotating pipe joint 240, and the first pipe 210 rotates around the second pipe 220 when the pipe body 110 rotates. Specifically, the rotating pipe joint 240 is provided with a rotating structure, which can cause the connection structures at both ends to rotate relative to each other. The two ends of the rotating pipe joint 240 correspond to the inlet of the first pipe 210 and the outlet of the second pipe 220, respectively. 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 in a predetermined position by a fixing member 241.

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

[0068] A grouting valve 211 is further provided between the first pipe 210 and the grouting port 131. The processing equipment 200 further comprises 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 flexible material. The first pipe 210 can be a rubber pipe, a polyurethane hose, a PVC hose, etc. As a preferred embodiment, the first pipe 210 is a rubber pipe.

[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 inlet of the spiral cavity 113.

[0071] In one embodiment, the processing equipment 200 further comprises a limiting device for limiting the axial movement of the pipe body 110.

[0072] The rotary drive device 260 is provided at the bottom of the steel pipe 100, and the rotary drive device 260 is drivingly connected to the outer pipe 111 and can abut against the outer wall of the outer pipe 111. The rotary drive device 260 is rotated to drive the outer pipe 111 to rotate by friction.

[0073] In one embodiment, the rotary drive device 260 further comprises a lifting device, the lifting device is movably connected to the pipe body 110, and the lifting device can make the axis of the pipe body 110 form a predetermined angle with the ground level. The lifting device lifts the end of the steel pipe 100 with the grouting port 131.

[0074] The limiting device and the lifting device are integrated, which can fix the outer pipe 111 in the axial direction and lift the end with the grouting port 131, so that the pipe body 110 is inclined and cannot move in the axial direction.

[0075] In one embodiment, the rotary drive device is provided with a vibration mechanism for vibrating the steel pipe.

[0076] Figures 6-7A process diagram of a manufacturing process of the spiral cavity steel pipe 100 filled with concrete 140 in an embodiment of the present application is shown, the manufacturing process is used to manufacture the spiral cavity steel pipe 100 filled with concrete 140 as described above, and the manufacturing process comprises the following steps:

[0077] S100, rotating the pipe body 110 around the axis of rotation 101; and

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

[0079] In one embodiment, the step of rotating the pipe body 110 around the axis of rotation 101 further comprises lifting the grouting port side of the pipe body 110 to rotate the pipe body 110 around the axis of rotation 101 at a predetermined angle with the ground level.

[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 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 pipe body 110 into the spiral cavity 113 of the pipe body 110 comprises adjusting the flow rate of 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 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 in particular less than or equal to 70% or 60%.

[0082] In one embodiment, the step of injecting concrete from one end of the pipe body 110 into the spiral cavity 113 of the pipe body 110 comprises adjusting the rotation speed of the pipe body 110 to a predetermined 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 the concrete forms a gap with the outer wall 111 of the inner pipe. Continuous adhesion in the circumferential direction means that the concrete can adhere to the inner wall of the outer pipe 111 by 360° over at least a certain length of the outer pipe 111, forming a circumferentially continuous layer of concrete fluid.

[0083] The manufacturing process using the above manufacturing equipment 200 is as follows.

[0084] After the installation of each device and part in the above manufacturing equipment 200 is completed, the driving device 260 is started to rotate the pipe body 110 of the steel pipe 100 around the inclined axis of rotation 101, the pipe body 110 of the steel pipe 100 starts to rotate, and the first pipe 210 starts to rotate with the steel pipe 100. The rotation direction of the pipe body 110 of the steel pipe 100 is opposite to the spiral advancing direction of the spiral ring plate 120 of the steel pipe 100.

[0085] The concrete delivery device 230 is started, and the concrete 140 is injected into the spiral cavity of the pipe body 110 of the steel pipe 100 through the second pipe 220, the rotating pipe joint 240 and the first pipe 210. The rotating speed of the pipe body 110 of the steel pipe 100 is configured to ensure that the centrifugal force generated thereby makes the concrete 140 tightly adhere to 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 layer pipe wall of the steel pipe 100, as shown in Figure 6 and Figure 7 .

[0086] Under the action of the centrifugal force, the concrete 140 pressed against the inner wall of the outer pipe 111 spreads around the wall surface, and the spiral angle of the spiral ring makes the spreading direction of the concrete 140 move forward. In addition, due to the elevation of the pipe body 110 of the steel pipe 100 on the side of the grouting port 131, the concrete 140 in the spiral cavity will move to the other end of the pipe body 110 under the action of gravity until reaching the end of the other end, gradually filling the cavity of the end.

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

[0088] When the cavity is completely filled with the 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 delivery 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 of the concrete 140 in the first pipe 210 are configured to ensure that the concrete 140 does not fill the entire cross section of the spiral cavity under the action of the centrifugal force after entering the spiral cavity.

[0091] In the above process, the vibration of the pipe body 110 of the steel pipe 100 during rotation has a vibration tamping effect on the concrete 140 in the spiral cavity 113, so that the concrete 140 is gradually compacted.

[0092] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0093] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0094] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0095] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0096] It is to be noted that when an element such as a layer, film, or region is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. It will be understood that, when an element or layer is referred to as being "connected" to or "coupled" to another element or layer, it can be directly connected or coupled or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0097] Various technical features of the above-described embodiments can each be combined in any combination, as can be appreciated by one of ordinary skill in the art. For the sake of brevity, descriptions of all possible combinations are not described, however, all such combinations are contemplated and are within the scope of the present specification.

[0098] The above-described embodiments are merely illustrative for the present application and do not limit the scope of the present application. It should be understood by those skilled in the art that various modifications and improvements can be made to the embodiments without departing from the spirit of the present application. Accordingly, the scope of the present application should be determined by the appended claims rather than the above description.

Claims

1. A concrete filled spiral cased steel pipe characterized by, The steel pipe comprises: a pipe body comprising an inner pipe and an outer pipe, the outer pipe being sleeved outside the inner pipe to form a containing cavity between the inner pipe and the outer pipe; a spiral ring plate arranged in the containing cavity, an inner periphery of the spiral ring plate being connected to an outer surface of the inner pipe, an outer periphery of the spiral ring plate being connected to an inner surface of the outer pipe, and the spiral ring plate dividing the containing cavity into spiral cavities; and concrete arranged in the spiral cavities and injected into the spiral cavities from one end of the pipe body by rotating the pipe body around an axis thereof.

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

3. The filled concrete spiral cavity steel pipe of claim 1, wherein, The outer pipe is a straight pipe, or the outer pipe is a wavy pipe.

4. The filled concrete spiral cavity steel pipe of claim 1, wherein, The steel pipe further comprises annular sealing plates arranged at both ends of the inner pipe and the outer pipe, at least one of the annular sealing plates being provided with a grouting port and an exhaust and drainage port both communicating with the outside.

5. A processing plant for filling concrete, characterized in that, The processing equipment is used for processing the concrete-filled spiral cavity steel pipe according to any one of claims 1-4, and the processing equipment comprises: a concrete conveying device for conveying concrete to the spiral cavities of the steel pipe; a pipe assembly comprising a pipe communicating with the concrete conveying device and the spiral cavities and a valve arranged in the pipe; and a rotating driving device for lifting the pipe body and driving the pipe body to rotate around the axis.

6. A processing plant for filling concrete according to claim 5, characterized in that, The pipe assembly comprises a first pipe and a second pipe, the first pipe being connected between the second pipe and the spiral cavities, the second pipe being connected between the first pipe and the concrete conveying device, and the second pipe being arranged along the axis.

7. A processing plant for filling concrete according to claim 6, characterized in that, The first pipe and the second pipe are rotationally connected through a rotating pipe joint, and the first pipe rotates around the axis of the second pipe when the pipe body rotates.

8. A processing plant for filling concrete according to claim 6, characterized in that, The first pipe is provided with a plurality of first pipes, each of which corresponds to an independent spiral cavity.

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

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

11. A processing plant for filling concrete according to claim 5, characterized in that, The processing equipment further comprises a limiting device for limiting the axial movement of the pipe body.

12. A processing plant for filling concrete according to claim 5, characterized in that, The rotating driving device is provided with a vibrating mechanism for vibrating the steel pipe.

13. A processing plant for filling concrete according to claim 5, characterized in that, The rotating driving device further comprises a lifting device capable of lifting the axis of the pipe body to a preset angle with the ground level to lift one side of the grouting port of the steel pipe.

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