Vacuum-assisted device for filling concrete

Abstract

The utility model relates to vacuum auxiliary equipment for filling concrete, the auxiliary equipment is used for auxiliary processing of a spiral cavity steel pipe filled with the concrete, the auxiliary equipment is located at the other end, deviating from filling equipment, of the steel pipe, and the auxiliary equipment comprises a pipeline assembly and a vacuum pump assembly, comprising a vacuum tube communicated between the outside and the spiral cavity, and one end of the vacuum tube is connected to the exhaust and drainage port; and the vacuum pump is connected with the other end, far away from the gas and water discharging opening, of the vacuum pipe, and the vacuum pump is used for discharging gas in the spiral cavity. The auxiliary equipment and the concrete conveying device are installed at the two ends of the steel pipe body respectively, mutual interference between the auxiliary equipment and the concrete conveying device is avoided through the layout design, and in the vacuum auxiliary filling process, the removal efficiency of bubbles and water in concrete is remarkably improved through the negative pressure effect; the negative effects of bubbles and water seepage on the strength and durability of the concrete structure are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete-steel pipe composite structure, in particular to a vacuum-assisted device for filling concrete. BACKGROUND

[0002] The steel pipe structure filled with concrete in the 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. It has unique mechanical properties and application advantages. The compressive strength of concrete is high, but the bending resistance is weak. Steel, especially shaped steel, has strong bending resistance and good elastic-plasticity, but it is easy to lose stability and axial compressive capacity under compression. 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 inner cavity between the double-layer steel pipes. Due to the long length of the pipe, the cavity between the inner and outer layers is narrow and spiral, which increases the difficulty of the filling process and reduces the yield, especially the double-layer steel pipe with a spiral cavity developed by the applicant. The sandwich layer between the two steel pipe walls has a spiral ring plate, so that the longitudinal section of the steel pipe wall is in continuous "H" shape (or "K" shape), and another steel pipe with corrugated outer wall, as shown in Figure 1 、 2 Although these steel pipes have higher strength in double-layer steel pipes, they also face the problems of inconvenient processing and low processing efficiency. In order to solve the above problems, the applicant developed a steel pipe, filling equipment and method for filling concrete by using the centrifugal force generated by the rotation of the steel pipe body and the gravity of the concrete, as shown in Figure 3 、 4 The above method can eliminate delamination and large bubbles in the spiral cavity, but small bubbles and a small amount of water seepage still exist, which affects the compactness of the concrete. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a steel pipe, filling equipment and method for filling concrete by using the rotation of the steel pipe body, and an auxiliary device to assist in reducing bubbles, water seepage and other problems.

[0005] A vacuum-assisted device for filling concrete, the device is used to assist the processing of a spiral cavity steel pipe filled with concrete, the steel pipe comprises a pipe body and a spiral ring plate, the pipe body comprises an inner pipe and an outer pipe, and a containing cavity is formed between the inner pipe and the outer pipe; the spiral ring plate is arranged between the inner pipe and the outer pipe, and the spiral ring plate divides the containing cavity into spiral cavities; one end of the steel pipe is provided with a grouting port, an exhaust and drainage port, and a concrete filling device which are in communication with the outside and the spiral cavities;

[0006] The device is arranged at the other end of the steel pipe away from the concrete filling device, and the device comprises:

[0007] A pipeline assembly comprising a vacuum pipe in communication between the outside and the spiral cavities, one end of the vacuum pipe being connected to the exhaust and drainage port; and

[0008] A vacuum pump connected to the other end of the vacuum pipe away from the concrete filling device, the vacuum pump being used to extract the gas in the spiral cavities to form a negative pressure in the spiral cavities.

[0009] In one embodiment, the vacuum pipe comprises a first vacuum pipe and a second vacuum pipe, the first vacuum pipe being connected between the second vacuum pipe and the vacuum pump, the second vacuum pipe being connected between the first vacuum pipe and the exhaust and drainage port, and the first vacuum pipe being arranged along the axis of the steel pipe.

[0010] In one embodiment, the second vacuum pipe extends along the pipe wall surface of the steel pipe to the end where the grouting port is located.

[0011] In one embodiment, the first vacuum pipe and the second vacuum pipe are rotationally connected through a rotary pipe joint, and the second vacuum pipe rotates around the axis of the first vacuum pipe with the rotation of the steel pipe.

[0012] In one embodiment, a plurality of second vacuum pipes are provided, and each second vacuum pipe corresponds to an independent spiral cavity.

[0013] In one embodiment, the second vacuum pipe is made of a flexible transparent material.

[0014] In one embodiment, the rotary pipe joint is placed on a fixed support.

[0015] In one embodiment, the pipeline assembly further comprises a grout storage box arranged on the first vacuum pipe and the second vacuum pipe, respectively, and a valve arranged on the first vacuum pipe and the second vacuum pipe, respectively.

[0016] In one embodiment, the second vacuum pipe is connected to the side of the slurry storage tank corresponding to the outer end of the steel pipe.

[0017] In one embodiment, the steel pipe is lifted by a lifting device to the side of the steel pipe with the grouting opening.

[0018] The present application has the following technical effects:

[0019] 1) Layout optimization of auxiliary equipment: The auxiliary equipment and the concrete conveying device are respectively installed at both ends of the steel pipe body. This clever layout design avoids mutual interference between the two. Since both processes need to independently occupy the axial line of the steel pipe body, it is impossible to set them on the same side. This separate layout ensures that each process can operate efficiently without interference, thereby improving the overall construction efficiency.

[0020] 2) Bubble removal: During the vacuum-assisted filling process, the negative pressure significantly improves the efficiency of removing bubbles inside the concrete. Because negative pressure can generate strong suction, it can more thoroughly extract bubbles from the concrete, thereby reducing the negative impact of bubbles on the structural strength and durability of the concrete.

[0021] 3) Water extraction: In addition to bubbles, vacuum technology can also effectively and more thoroughly extract excess water from the interior of the concrete. This extraction helps to reduce the bleeding phenomenon of the concrete, ensuring the uniformity and density of the concrete, thereby improving the final quality of the concrete.

[0022] 4) Improvement of concrete density: Through vacuum-assisted filling technology, the density of the concrete is significantly improved. Since bubbles and excess water are effectively removed, the porosity of the concrete is reduced, which not only enhances the compressive strength of the concrete, but also improves its durability and impermeability.

[0023] 5) Vacuum filling technology ensures that there is no delamination between the concrete and the steel pipe structure. Since the density of the concrete increases, its combination with the steel pipe is more secure, which helps to improve the stability and load-bearing capacity of the entire steel pipe concrete structure.

[0024] 6) Vacuum-assisted filling technology can also speed up the flow rate of concrete in the spiral cavity, thereby improving the filling efficiency. This rapid flow helps to reduce the time consumption during the filling process, while also reducing the risk of structural defects caused by uneven filling. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Structure diagram of the steel pipe based on the present application.

[0026] Figure 2Structure diagram of a steel pipe based on which the present application is implemented.

[0027] Figure 3 Structure diagram of a steel pipe and a filling device based on which the present application is implemented.

[0028] Figure 4 Process diagram of a filling device based on which the present application is implemented filling concrete.

[0029] Figure 5 Structure diagram of a steel pipe and an auxiliary device in an embodiment of the present application.

[0030] Figure 6 Structure diagram of Figure 5 Structure diagram of an auxiliary device viewed in the A direction.

[0031] Explanation of reference numerals:

[0032] 100, steel pipe; 101, axis line; 110, pipe body; 111, outer pipe; 112, inner pipe; 113, spiral cavity; 120, spiral ring plate; 130, annular blocking plate; 131, grouting port; 132, exhaust and drainage port; 140, concrete; 200, filling device; 210, first pipeline; 211, grouting valve; 220, second pipeline; 230, concrete conveying device; 240, rotary pipe joint; 241, fixing member; 250, exhaust pipe; 251, exhaust valve; 260, rotary driving device; 300, auxiliary device; 310, vacuum pump; 320, pipeline assembly; 321, first vacuum pipe; 322, second vacuum pipe; 323, rotary pipe joint; 324, fixing support; 330, grouting tank. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand 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 departing from the spirit of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] Reference is made to Figures 1-4 , Figure 1 , 2 Structure diagram of a spiral welded steel pipe 100 with a spiral interlayer in the pipe wall based on which the present application is implemented is shown, Figure 3 , 4 A processing device (hereinafter referred to as a concrete filling device 200) for filling the above steel pipe 100 with concrete based on which the present application is implemented is shown.

[0035] The following will first briefly introduce the steel pipe 100 and the concrete filling device 200.

[0036] The steel pipe 100 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, the outer pipe 111 is sleeved on the inner pipe 112 at intervals to form a containing cavity between the inner pipe 112 and the outer pipe 111. The spiral ring plate 120 is arranged in the containing 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 containing 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 by the way of autorotation of the pipe body 110 around the axis 101.

[0037] Through the autorotation of the pipe body 110, the flow and filling of the concrete 140 in the spiral cavity are smoother under the dual action of centrifugal force and 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 faster. Due to the action of 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 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 pipe wall bulging or deformation caused by excessive pressure. The vibration generated by the pipe body 110 of the steel pipe 100 during rotation can play a vibrating role, which helps to expel the air bubbles and compact the concrete 140 inside, and improves 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.

[0038] In one embodiment, the axis 101 of the pipe body 110 is at a preset angle with the horizon, so that the grouting port side 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 obliquely 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°.

[0039] 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.

[0040] In one embodiment, the rotation direction of the pipe body 110 around the axis 101 is 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 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 driving.

[0041] 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 corrugated protrusions and depressions on the 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.

[0042] 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, and the inner wall of the inner tube 112 forms an inner cavity as the inner cavity of the steel pipe 100.

[0043] 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, both of which are in communication with the outside.

[0044] 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.

[0045] 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 of 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 of 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.

[0046] 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, so 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.

[0047] 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-shape and is not 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.

[0048] like Figure 3 , 4 As shown, the concrete filling equipment 200 is used to process the spiral cavity steel pipe 100 for filling concrete 140 as described above. The concrete filling equipment 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 driven by the steel pipe 100 and is used to lift the pipe and drive the pipe to rotate around its axis. The rotary drive device 260 is disposed at the bottom of the steel pipe 100 and is driven by an outer pipe 111, which 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.

[0049] 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.

[0050] 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, the second pipe 220 being connected between the first pipe 210 and the discharge port, and the second pipe 220 being disposed along the axis 101.

[0051] 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.

[0052] In one embodiment, the first pipe 210 is provided with a plurality of pipes, each of the first pipe 210 corresponding to an independent spiral cavity 113. Correspondingly, the discharge port is provided with a plurality of discharge ports corresponding to a first pipe 210, and at least one discharge port corresponding to an independent spiral cavity 113. When the first pipe 210 is provided with a plurality of 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 a plurality of outlets on the rotatable main body. The fixed main body is fixed in a predetermined position by a fixing member 241.

[0053] A grouting valve 211 is further provided between the first pipe 210 and the grouting port 131. The concrete filling device 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.

[0054] 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. Preferably, the first pipe 210 is a rubber pipe.

[0055] Referring to Figure 5 , 6 , Figure 5 、 6 A structural schematic diagram of an auxiliary device 300 according to an embodiment of the present application is shown. The auxiliary device 300 is used to assist in processing the spiral cavity steel pipe 100 filled with concrete 140, and the auxiliary device 300 is located at the other end of the steel pipe 100 away from the concrete filling device 200. The auxiliary device 300 comprises a pipe assembly 320 and a vacuum pump 310. The pipe assembly 320 comprises a vacuum pipe connected between the outside and the spiral cavity 113, one end of the vacuum pipe being connected to the exhaust and drainage port 132. The vacuum pump 310 is connected to the other end of the vacuum pipe away from the concrete filling device 200 and away from the exhaust and drainage port 132. The vacuum pump 310 is used to extract the gas in the spiral cavity 113, so as to form a negative pressure in the spiral cavity.

[0056] By setting the auxiliary device 300, the auxiliary device 300 and the concrete 140 conveying device are respectively installed at both ends of the pipe body 110 of the steel pipe 100, and this layout design ingeniously avoids mutual interference between the two, and the separated layout ensures that each process can operate efficiently without interference, thereby improving the overall construction efficiency; in the vacuum-assisted filling process, the negative pressure significantly improves the bubble removal efficiency inside the concrete 140. Because the negative pressure can generate strong suction, it can more thoroughly extract the bubbles in the concrete 140, thereby reducing the negative impact of the bubbles on the structural strength and durability of the concrete 140; in addition to bubbles, the vacuum technology can also effectively and more thoroughly extract excess moisture inside the concrete 140; the density of the concrete 140 is significantly improved, and the porosity of the concrete 140 is reduced, which not only enhances the compressive strength of the concrete 140, but also improves its durability and impermeability; and ensures that the concrete 140 and the steel pipe 100 structure will not have delamination phenomenon. Due to the increased density of the concrete 140, the combination of the concrete 140 and the steel pipe 100 is more firm, which helps to improve the stability and carrying capacity of the entire steel pipe 100 concrete 140 structure; it can also speed up the flow speed of the concrete 140 in the spiral cavity 113, thereby improving the filling efficiency, helping to reduce the time consumption in the filling process, and also reducing the risk of structural defects caused by uneven filling.

[0057] Further, the vacuum pump 310 is one of a vacuum pump 310, a micro vacuum pump 310, a micro air pump, a micro air pump, and a micro air pump. The vacuum pump 310 operates at a preset power for a preset time to ensure that the vacuum degree in the vacuum pipe and the spiral cavity 113 reaches less than 50% of the standard atmospheric pressure value, preferably, less than 30% of the standard atmospheric pressure value.

[0058] In one embodiment, the vacuum pipe includes a first vacuum pipe 321 and a second vacuum pipe 322, the first vacuum pipe 321 is connected between the second vacuum pipe 322 and the vacuum pump 310, the second vacuum pipe 322 is connected between the first vacuum pipe 321 and the exhaust and drainage port 132, and the first vacuum pipe 321 is arranged along the axis 101 of the steel pipe 100.

[0059] Specifically, the first vacuum pipe 321 and the second vacuum pipe 322, the first vacuum pipe 321 and the vacuum pump 310, and the second vacuum pipe 322 and the exhaust and drainage port 132 are all sealed and connected, and can be sealed and connected by a quick release structure.

[0060] In one embodiment, the second vacuum pipe 322 extends along the pipe wall surface of the steel pipe 100 to the end where the grouting port 131 is located.

[0061] Specifically, the exhaust and drainage port 132 is provided with several, and the several exhaust and drainage ports 132 include a part located at one end of the same side of the grouting port 131 on the steel pipe 100 and a part located at one end of the steel pipe 100 away from the grouting port 131, that is, the exhaust and drainage port 132 is provided at both ends of the steel pipe 100. Since when the concrete filling device 200 is located at the first end (the right end shown in the figure) of the steel pipe 100, the auxiliary device 300 is located at the second end (the left end shown in the figure) of the steel pipe 100, the grouting port 131 is located at the first end, and the second vacuum pipe 322 is connected to the exhaust and drainage port 132 at the first end, it is necessary to extend from the second end to the first end along the inner surface or the outer surface of the pipe wall of the steel pipe 100. The inner surface or the outer surface of the pipe wall of the steel pipe 100 can be provided with a member for fixing the second vacuum pipe 322. Figure 5 Figure 5 Specifically, the exhaust and drainage port 132 is provided with several, and the several exhaust and drainage ports 132 include a part located at one end of the same side of the grouting port 131 on the steel pipe 100 and a part located at one end of the steel pipe 100 away from the grouting port 131, that is, the exhaust and drainage port 132 is provided at both ends of the steel pipe 100. Since when the concrete filling device 200 is located at the first end (the right end shown in the figure) of the steel pipe 100, the auxiliary device 300 is located at the second end (the left end shown in the figure) of the steel pipe 100, the grouting port 131 is located at the first end, and the second vacuum pipe 322 is connected to the exhaust and drainage port 132 at the first end, it is necessary to extend from the second end to the first end along the inner surface or the outer surface of the pipe wall of the steel pipe 100. The inner surface or the outer surface of the pipe wall of the steel pipe 100 can be provided with a member for fixing the second vacuum pipe 322.

[0062] In one embodiment, the first vacuum pipe 321 and the second vacuum pipe 322 are connected by a rotary pipe joint 323, and the second vacuum pipe 322 rotates around the axis 101 of the first vacuum pipe 321 with the rotation of the steel pipe 100.

[0063] Specifically, the rotary pipe joint 323 is provided with a rotating structure, which can cause the connecting structures at both ends to rotate relative to each other. The two ends of the rotary pipe joint 323 correspond to the outlet of the first vacuum pipe 321 and the inlet of the second vacuum pipe 322, respectively. When the pipe body 110 rotates, the second vacuum pipe 322 is driven to rotate around the first vacuum pipe 321. In one embodiment, the rotary pipe joint 323 is placed on a fixed support 324, and the main body of the rotary pipe joint 323 is fixed at a predetermined position by the fixed support 324.

[0064] In one embodiment, the second vacuum pipe 322 is provided with multiple second vacuum pipes 322, and each second vacuum pipe 322 corresponds to an independent spiral cavity 113. The second vacuum pipe 322 is provided with multiple second vacuum pipes 322, and the multiple second vacuum pipes 322 form branch paths of the first vacuum pipe 321. Each exhaust and drainage port 132 is connected to a second vacuum pipe 322, and at least one exhaust and drainage port 132 corresponds to an independent spiral cavity 113. When the second vacuum pipe 322 is provided with multiple second vacuum pipes 322, the rotary pipe joint 323 is a one-to-many structure, and the rotary pipe joint 323 has a fixed main body with an inlet, a rotatable main body, and multiple outlets on the rotatable main body.

[0065] In one embodiment, the second vacuum pipe 322 is made of flexible transparent material. The second vacuum pipe 322 can be a rubber pipe, a polyurethane hose, a PVC hose, etc.

[0066] ​In one embodiment, the pipe assembly 320 further comprises a slurry storage box 330 respectively arranged on the first vacuum pipe 321 and / or the second vacuum pipe 322, and a valve respectively arranged on the first vacuum pipe 321 and the second vacuum pipe 322. The second vacuum pipe 322 is connected to the slurry storage box 330 at a position corresponding to the outer end of the steel pipe 100.

[0067] Specifically, the slurry storage box 330 is sealingly connected to the first vacuum pipe 321 and / or the second vacuum pipe 322, and is used to store the slurry of the concrete 140 sucked out. The first vacuum pipe 321 and the second vacuum pipe 322 are respectively connected to the upper part of the slurry storage box 330, so that the gas can flow through the upper part while the slurry can be stored in the lower part. Preferably, the slurry storage box 330 is arranged on each second vacuum pipe 322, and the second vacuum pipe 322 is divided into a section between the exhaust and drainage port 132 and the slurry storage box 330 and a section between the rotary pipe joint 323 and the slurry storage box 330. The slurry storage box 330 is made of transparent material, and the transparent material of the second vacuum pipe 322 can be visually observed together with the slurry storage box 330.

[0068] In one embodiment, the steel pipe 100 is lifted by the lifting device on the side of the grouting port 131 of the steel pipe 100.

[0069] The working process of the auxiliary equipment 300 is briefly described as follows.

[0070] First, install and connect the parts and components of the auxiliary equipment 300, and close the valve of the exhaust and drainage port 132 on the side of the vacuum pump 310 (the first end of the steel pipe 100). Start the rotary drive device 260, and the pipe body 110 of the steel pipe 100 starts to rotate. When the concrete filling equipment 200 starts to inject the concrete 140 into the spiral cavity 113 of the pipe body 110 of the steel pipe 100 (or after a certain volume of concrete 140 is injected), start the vacuum pump 310 to start vacuumizing. The second vacuum pipe 322 starts to rotate with the pipe body 110 of the steel pipe 100 as the axis of rotation, and when the spiral cavity of the pipe body 110 of the steel pipe 100 is filled with the concrete 140, and the second vacuum pipe 322 on the side of the grouting port 131 appears the slurry of the concrete 140 (or the slurry appears in the slurry storage box 330 on this side), open the valve of the exhaust and drainage port 132 on the side of the steel pipe 100 of the vacuum pump 310. When the slurry of the concrete 140 appears in the slurry storage box 330 or the second vacuum pipe 322 connected to the exhaust and drainage port 132, close all the exhaust valve, and close the valve of the grouting port 131. Thus, the vacuum-assisted concrete 140 filling construction is completed.

[0071] An embodiment of the present application also provides a vacuum-assisted method for filling concrete, using the vacuum-assisted device for filling concrete as described above, comprising the steps of:

[0072] S100, rotating the spiral cavity steel pipe 100;

[0073] S200, filling concrete into the spiral cavity from one end of the steel pipe 100, and extracting gas from the spiral cavity 113 from the other end of the steel pipe 100.

[0074] Specifically, before the step S100, the steps of setting the position and lifting angle of the steel pipe 100, connecting and installing the concrete filling device 200, and connecting and installing the auxiliary device 300 are included.

[0075] In the step S100, the step of starting the rotation driving device 260 to rotate the spiral cavity steel pipe at a preset power, so that the spiral cavity steel pipe rotates around the axis of rotation 101 at a constant or linear rotational speed is included.

[0076] In the step S200, the steps of:

[0077] S210, using the concrete filling device 200 to inject concrete slurry into the steel pipe 100 from the grouting port 131 at a preset flow rate;

[0078] S220, when the injected concrete slurry occupies 10%-60% of the volume of the spiral cavity 113, using the auxiliary device 300 to extract gas from the spiral cavity 113 from the side of the steel pipe 100 away from the grouting port 131 at a preset power; preferably, when the injected concrete slurry occupies 20%, 30%, 40%, or 50% of the volume of the spiral cavity 113, the auxiliary device 300 is used to extract gas;

[0079] Or, while injecting concrete slurry, starting the auxiliary device 300 to extract gas from the spiral cavity 113 from the side of the steel pipe away from the grouting port 131 at a preset power;

[0080] During the step S220, the steel pipe 100 is kept rotating, and the second vacuum pipe 322 rotates with the pipe body 110 around the axis of rotation 101 of the pipe body 110 of the steel pipe 100.

[0081] S230, when the concrete slurry fills the spiral cavity 113, stopping the extraction of gas and stopping the injection of concrete slurry. It can be understood that stopping the extraction of gas and stopping the injection of concrete slurry can be performed simultaneously or sequentially.

[0082] As a preferred mode, when the spiral cavity of the pipe body 110 of the steel pipe 100 is filled with the concrete 140, and the slurry of the concrete 140 appears in the second vacuum pipe 322 at one end of the grouting port 131 (or the slurry appears in the slurry storage tank 330 at this end), it is judged that the standard of stopping gas extraction is reached, and the valve of the exhaust and drainage port 132 of the steel pipe 100 on the side of the vacuum pump 310 (i.e. the side where the auxiliary equipment 300 is located) is opened. When the slurry of the concrete 140 appears in the slurry storage tank 330 or the second vacuum pipe 322 connected to the exhaust and drainage port 132, it is judged that the standard of stopping the injection of the concrete slurry is reached, and all the exhaust port valves and the concrete filling equipment 200 are closed.

[0083] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0084] In addition, if the terms "first", "second" appear, 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 the technical features indicated. Therefore, the features limited by "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0085] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. 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 specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] In the present application, unless specifically defined otherwise, if there is an appearance of a first feature "on" or "above" a second feature, it can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Also, the first feature "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0087] It should be noted that if an element is referred to as being "fixed" or "attached" to another element, it can be directly on the other element or an intervening element can also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or an intervening element can also be present. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions as used herein are for purposes of explanation only and are not intended to be limiting.

[0088] The technical features of the above-described embodiments can be combined in any manner, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered to be within the scope of the present disclosure.

[0089] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A vacuum assisted apparatus for filling concrete, characterized in that, The auxiliary equipment is used for assisting in processing spiral cavity steel pipe filled with concrete, the steel pipe comprises a pipe body and a spiral ring plate, the pipe body comprises an inner pipe and an outer pipe, and a containing cavity is formed between the inner pipe and the outer pipe; the spiral ring plate is arranged between the inner pipe and the outer pipe, and the spiral ring plate divides the containing cavity into spiral cavities; one end of the steel pipe is provided with a grouting port, an exhaust and drainage port and a concrete filling device which are connected with the outside and the spiral cavities; The auxiliary equipment is located at the other end of the steel pipe away from the concrete filling device, and the auxiliary equipment comprises: a pipeline assembly comprising a vacuum pipe connected between the outside and the spiral cavities, one end of the vacuum pipe being connected to the exhaust and drainage port; and a vacuum pump connected to the other end of the vacuum pipe away from the concrete filling device, the vacuum pump being used for pumping out gas in the spiral cavities to form negative pressure in the spiral cavities.

2. Vacuum assisted apparatus for filling concrete according to claim 1, characterized in that The vacuum pipe comprises a first vacuum pipe and a second vacuum pipe, the first vacuum pipe being connected between the second vacuum pipe and the vacuum pump, the second vacuum pipe being connected between the first vacuum pipe and the exhaust and drainage port, and the first vacuum pipe being arranged along the axis of the steel pipe.

3. Vacuum assisted apparatus for filling concrete according to claim 2, characterized in that The second vacuum pipe extends along the pipe wall surface of the steel pipe to the end where the grouting port is located.

4. Vacuum assisted apparatus for filling concrete according to claim 2, characterized in that The first vacuum pipe and the second vacuum pipe are rotationally connected through a rotary pipe joint, and the second vacuum pipe rotates around the axis of the first vacuum pipe along with the rotation of the steel pipe.

5. Vacuum assisted apparatus for filling concrete according to claim 4, characterized in that A plurality of second vacuum pipes are arranged, and each second vacuum pipe corresponds to an independent spiral cavity.

6. Vacuum assisted apparatus for filling concrete according to claim 4, characterized in that The second vacuum pipe is made of flexible transparent material.

7. Vacuum assisted apparatus for filling concrete according to claim 4, characterized in that The rotary pipe joint is placed on a fixed support.

8. The vacuum-assist apparatus for filling concrete of claim 2, wherein, The pipeline assembly further comprises a grout storage box body arranged on the first vacuum pipe and the second vacuum pipe respectively, and a valve arranged on the first vacuum pipe and the second vacuum pipe respectively.

9. Vacuum assisted apparatus for filling concrete according to claim 8, characterized in that The second vacuum pipe is connected to the position of the grout storage box body corresponding to the outer end side of the steel pipe.

10. The vacuum-assist apparatus for filling concrete of claim 1, wherein, The steel pipe is lifted by a lifting device on the side of the grouting port of the steel pipe.

Images