3D printing concrete reinforcement device and method

Abstract

The invention relates to the technical field of concrete building structures, and discloses a 3D printing concrete reinforcement device and method.The 3D printing concrete reinforcement device comprises a base table, reinforcement rods, fixing sleeves and fixing screw rods, a plurality of fixing holes and a plurality of counter bores are formed in the surface of the base table in an array mode, and the diameter of the counter bores is larger than that of the fixing holes; the fixing hole is perpendicular to the direction of the plane where the base station is located and penetrates through the base station; the fixing sleeve can be inserted into the counter bore, the fixing screw can penetrate through the fixing hole and is in threaded connection with one end of the fixing sleeve, and an end block with the diameter larger than that of the fixing hole is arranged at the end, away from the fixing sleeve, of the fixing screw. The reinforced rod comprises a plurality of construction sections which are connected end to end, and the construction sections are connected through assemblies. The bottom of the reinforcement rod is connected with the end, away from the fixing screw, of the fixing sleeve. The defect that a building structure constructed in the prior art is insufficient in strength can be overcome.

Description

Technical Field

[0001] The present application relates to the technical field of concrete building structures, and in particular to a 3D printing concrete reinforcement device and method. Background Art

[0002] 3D printed concrete is a new construction technology that uses computer layered modeling and program instructions to repeatedly lay materials layer by layer under the control of industrial robots to construct free-form building structures.

[0003] In the prior art, there is a 3D printing concrete equipment, which includes a mixing device, a feeding device and a 3D printing device. The mixing device is used to mix concrete to ensure the uniformity and stability of the concrete material. The feeding device transports the mixed concrete material to the nozzle of the 3D printing device. The 3D printing device includes a main structure, a control system, a nozzle, a mobile platform and auxiliary equipment. The main structure is used to support and move the nozzle to achieve precise positioning and printing path control. The control system controls the motion trajectory and material extrusion amount of the printing device through a computer program to ensure the accuracy and stability of the printing process. The nozzle extrude the concrete material and lay it layer by layer on the printing platform to form a building structure. The mobile platform is used to achieve rapid movement of the printed specimen and improve printing efficiency. Auxiliary equipment such as an LCD operating screen and a hopper. Through precise path control and material extrusion of the 3D printing device, the building structure is constructed layer by layer.

[0004] Regarding the above-mentioned related technologies, the layer-by-layer stacking process characteristics of the existing technology cause 3D printed concrete to produce a large number of interlayer interfaces, resulting in its mechanical properties being significantly lower than those of cast concrete, which affects its widespread application as a structural material and also limits the development of 3D printed concrete in large structures (such as houses and bridges). Summary of the invention

[0005] In order to improve the defect of insufficient strength of the building structure constructed by the existing technology, the following technical solutions are adopted: In a first aspect, the present application provides a 3D printing concrete reinforcement device.

[0006] A 3D printing concrete reinforcement device, comprising a base, a reinforcement rod, a fixing sleeve and a fixing screw; The surface array of the base is provided with a plurality of fixing holes and a plurality of countersunk holes, the countersunk holes are connected with the fixing holes and are opened one by one, and the diameter of the countersunk holes is larger than the diameter of the fixing holes; the fixing holes are perpendicular to the plane direction of the base and pass through the base; the fixing sleeve can be inserted into the countersunk hole, the fixing screw can pass through the fixing hole and be threadedly connected to one end of the fixing sleeve, and the end of the fixing screw away from the fixing sleeve is provided with an end block with a diameter larger than the fixing hole; the reinforcement rod includes a plurality of construction sections connected end to end, and the construction sections are connected by an assembly; the bottom of the reinforcement rod is connected to the end of the fixing sleeve away from the fixing screw.

[0007] By adopting the above technical solution, the fixing holes and countersunk holes on the surface of the base are designed so that the fixing sleeve can be inserted into the countersunk hole and threadedly connected to the fixing screw, and the bottom of the reinforcement rod is connected to the fixing sleeve, thereby achieving stable fixation of the reinforcement rod on the base, and the overall structure is stable, which facilitates accurate positioning and fixation of the steel bars during 3D concrete printing; by setting continuous reinforcement rods, longitudinal interlayer force conduction is achieved, thereby improving the strength and stability of the printed structure.

[0008] Optionally, the fixing sleeve is a polygonal structure, and the countersunk hole is a corresponding polygonal hole.

[0009] By adopting the above technical solution, the fixing sleeve has a polygonal structure, which can limit the rotation of the fixing sleeve in the countersunk hole, which is beneficial to improving the assembly efficiency of the reinforcement rod.

[0010] Optionally, both ends of the construction segment are provided with external threads, and the end of the fixed sleeve is provided with a first thread groove for threaded connection of the construction segment. The assembly is a first connecting sleeve, and both ends of the first connecting sleeve are provided with second thread grooves for threaded connection of the construction segment, and the threads in the second thread grooves at both ends of the first connecting sleeve have opposite rotation directions, and the construction segment can be threadedly connected to the first thread groove or the second thread groove.

[0011] By adopting the above technical solution, the external threads at both ends of the construction segment cooperate with the first thread groove at the end of the fixed sleeve and the second thread grooves at both ends of the first connecting sleeve, and the connection and fixation between the construction segments are achieved by threaded connection. The threads in the second thread grooves at both ends of the first connecting sleeve have opposite rotation directions, making the construction segments more secure when connected, able to withstand greater tension and pressure, and convenient for assembly and disassembly, thereby improving the assembly efficiency and flexibility of the reinforcement rod and adapting to the reinforcement requirements of different lengths and shapes.

[0012] Optionally, the assembly includes a plug block arranged at one end of the construction segment, and a socket block arranged at the other end of the construction segment, the diameter of the plug block gradually decreases in the direction away from the construction segment, and the diameter of the plug block at the connection between the plug block and the construction segment is larger than the construction segment; the end face of the socket block is provided with a socket slot for interference fit of the plug block, and the plug block has elastic deformation capability.

[0013] By adopting the above technical solution, the plug-in block and the socket block in the assembly are designed, and the plug-in block has elastic deformation ability and can be inserted into the socket slot with interference, so as to realize the rapid connection and fixation between the construction sections. This connection method is simple and reliable, does not require complicated tools and equipment, and is convenient for on-site operation. At the same time, the elastic deformation ability can adapt to certain assembly errors and improve the accuracy and efficiency of assembly.

[0014] Optionally, it further comprises a plurality of transverse connecting rods, two adjacent reinforcing rods are connected via the transverse connecting rods, and the reinforcing rods and the transverse connecting rods are connected via the assembly.

[0015] By adopting the above technical solution, the transverse connecting rod is set to connect two adjacent reinforcing rods together, and the connection between the reinforcing rod and the transverse connecting rod is realized through the assembly, thereby enhancing the integrity of the reinforcement device, improving the rigidity and stability of the reinforced structure, preventing the displacement or deformation of the reinforcing rod during the printing process, ensuring the shape and dimensional accuracy of the printed structure, and being conducive to improving the overall performance and bearing capacity of the printed structure.

[0016] Optionally, both ends of the construction section are provided with external threads, and the assembly is a second connecting sleeve, which is composed of a straight connection section arranged along the vertical direction and a side connection section arranged on the side wall of the straight connection section, and the upper and lower ends of the straight connection section of the second connecting sleeve are provided with third thread grooves for threaded connection of the construction section; both ends of the transverse connecting rod are provided with external threads, and the end of the side connection section of the second connecting sleeve is provided with a fourth thread groove for threaded connection of the transverse connecting rod.

[0017] By adopting the above technical solution, the external threads at both ends of the construction section and the transverse connecting rod respectively cooperate with the third thread groove of the second connecting sleeve straight section and the fourth thread groove of the side connecting section, thereby realizing the threaded connection between the reinforcement rod and the transverse connecting rod. This connection method has a simple structure, a firm connection, and is easy to assemble and disassemble. It can quickly realize the connection and fixation of the reinforcement rod and the transverse connecting rod, improve the assembly efficiency and flexibility of the reinforcement device, and adapt to the reinforcement requirements of different structural forms.

[0018] Optionally, a sealing assembly for closing the countersunk hole is also included, the sealing assembly includes a sealing column, a positioning member and an unlocking member, the sealing column can be inserted into the countersunk hole and seal the countersunk hole, when the sealing column is inserted into the countersunk hole, the positioning member can limit the upward movement of the sealing column; the unlocking member can unlock the positioning member.

[0019] By adopting the above technical solution, the setting of the sealing component can close the countersink, preventing concrete from entering the countersink during the 3D printing process, blocking the countersink and affecting subsequent use; at the same time, blocking the countersink can prevent the printing material from falling into the countersink and affecting the strength of the specimen.

[0020] Optionally, the sealing column includes a first column that is adapted to the shape of the countersunk hole and a second column that is adapted to the shape of the fixing hole. The positioning member includes a positioning block that is slidably inserted in the second column and a positioning spring that drives the end of the positioning block to slide out of the side wall of the second column. A guide ramp is provided on the side of the positioning block that is away from the first column. When the second column is inserted into the fixing hole, the guide ramp abuts against the base and slides into the second column under force. When the end of the second column passes through the fixing hole, the positioning spring can drive the positioning block to slide out of the second column, and the side wall of the positioning block abuts against the side wall of the base that is away from the reinforcement rod.

[0021] By adopting the above technical solution, the first column of the sealing column is adapted to the shape of the countersunk hole, and the second column is adapted to the shape of the fixing hole. Under the action of the positioning spring, the positioning block in the positioning member can slide out of the second column and abut against the base to achieve the positioning of the sealing column. When the second column is inserted into the fixing hole, the guide slope abuts against the base and slides into the second column under force. When the end of the second column passes through the fixing hole, the positioning spring drives the positioning block to slide out, realizing the automatic positioning function, which is easy to operate, accurate and reliable in positioning, and ensures the stability and sealing of the sealing column in the countersunk hole.

[0022] Optionally, the unlocking member includes an unlocking rod, a pressing head, a connecting rope and a return spring, the unlocking rod is slidably inserted in the second column along the length direction of the second column, one end of the unlocking rod passes through the second column and is connected to the pressing head, the other end of the unlocking rod is inserted in the second column, the return spring is arranged in the second column and is connected to the end of the unlocking rod away from the pressing head, one end of the connecting rope is connected to the positioning block, and the other end is connected to the unlocking rod, when the pressing head is pressed toward the first column, the unlocking rod drives the positioning block to slide into the second column through the connecting rope, and the spring is in a compressed state at this time.

[0023] By adopting the above technical solution, the unlocking rod, the pressing head, the linkage rope and the reset spring in the unlocking member cooperate with each other. By pressing the pressing head, the unlocking rod drives the positioning block to slide into the second column to unlock the positioning member. The operation is simple and convenient, and the unlocking is fast and reliable. The reset spring can automatically reset the unlocking rod after unlocking, which is convenient for the next unlocking operation, improves the convenience and work efficiency of the sealing assembly, and ensures the reliability and stability of the reinforcement device during use.

[0024] In a second aspect, the present application provides a 3D printing concrete reinforcement method, which utilizes the 3D printing concrete reinforcement device as described above.

[0025] A 3D printing concrete reinforcement method, based on the above scheme, includes: Step 1, bottom anchoring: inserting a plurality of the fixing sleeves on the base, then inserting fixing screws and threading them with the fixing sleeves, and then fixing the construction section on the fixing sleeves, thereby forming a bottom anchoring on the base; Step 2: Material filling: placing the 3D printing concrete into the material storage chamber of the 3D printer; Step 3, material printing: start the 3D printer, extrude at least one layer of material onto the base, and leave the end of the building segment; Step 4: Arrange the reinforcement: Pause the 3D printer and connect the next construction segment through the assembly; Step 5, material shaping: repeating steps 3 and 4, continuing to extrude materials to cover the previous materials and building sections, until the specimen is prepared, the last layer, no assembly is set, and the building section is covered; Step six, demolding and curing: remove the bottom fixing screw, take out the specimen, and place the specimen in a standard curing room for curing. Remove the fixing screw. This process should avoid damaging the morphology of the specimen by adopting the above technical solution.

[0026] By adopting the above technical solution, the 3D printing concrete reinforcement method realizes the synchronization of reinforcement and 3D printing concrete through the steps of bottom anchoring, material filling, material printing, steel bar arrangement, material molding and demolding and curing. During the printing process, the bottom anchor is formed first, then the concrete is printed layer by layer and the steel bars are arranged, and finally the construction section is covered to ensure that the position of the steel bars in the concrete is accurate and evenly distributed, thereby improving the overall strength and stability of the printed structure. The demolding and curing step ensures the integrity of the specimen during the curing process, avoids damage to the specimen morphology, and is conducive to improving the quality and performance of the printed structure to meet the needs of actual engineering applications.

[0027] In summary, the present application includes at least one of the following beneficial effects: 1. By setting up continuous reinforcement rods, the continuity of reinforcement and the integrity of the specimen are improved in the longitudinal direction, thereby truly realizing the anchorage and accurate reinforcement of the steel bars, realizing the longitudinal interlayer force conduction, and improving the strength and stability of the printed structure; 2. Through the connection and coordination between the assembly and the construction segment, the length of the reinforcement rod can be adjusted arbitrarily. At the same time, through the coordination between various construction segments, the flexibility of the reinforcement scheme design is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of Example 1; Figure 2 is a schematic cross-sectional structural diagram of the base in Example 1; Figure 3 is a schematic cross-sectional structural diagram of the assembly in Example 1; Figure 4 is a schematic structural diagram of Example 2; Figure 5 is a schematic cross-sectional structural diagram of the assembly in Example 2; Figure 6 is a schematic structural diagram of Example 3; Figure 7 is a schematic cross-sectional structural diagram of the sealing assembly in Example 4; Figure 8 yes Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0029] Explanation of the reference numerals: 1. base; 11. fixing hole; 12. countersunk hole; 2. reinforcement rod; 21. construction section; 3. fixing sleeve; 4. fixing screw; 41. end block; 5. assembly; 51. first connecting sleeve; 52. plug-in block; 53. socket block; 54. second connecting sleeve; 6. transverse connecting rod; 7. sealing assembly; 71. sealing column; 711. first column; 712. second column; 72. positioning member; 721. positioning block; 722. positioning spring; 73. unlocking member; 731. unlocking rod; 732. pressing head; 733. linkage rope; 734. reset spring. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 To Attachment Figure 8 This application is described in further detail.

[0031] Embodiment 1: In the prior art, due to the process characteristics of layer-by-layer stacking, a large number of interlayer interfaces are generated in 3D printing concrete technology, which results in its mechanical properties being significantly lower than those of cast concrete, thus affecting its widespread application as a structural material. To this end, the present application discloses a 3D printing concrete reinforcement device, which improves this defect by means of reinforcement, thereby achieving the purpose of significantly improving the overall strength of 3D printing concrete. The present application is further described in detail below.

[0032] Reference Figure 1 and Figure 2 In the embodiment of the present application, the concrete reinforcement device includes a base 1, a reinforcement rod 2, a fixing sleeve 3 and a fixing screw 4, wherein the base 1 is used as a working platform for printing concrete specimens, and plays a role similar to the foundation in a building structure, and is placed horizontally on the ground; the base 1 is preferably made of other metals or alloy materials such as steel and iron. Furthermore, in order to enhance the bearing capacity of the base 1, a transverse main beam and a longitudinal secondary beam can be welded and fixed at the bottom of the base 1.

[0033] Reference Figure 2 and Figure 3 The surface of the base 1 is provided with a plurality of fixing holes 11 and countersunk holes 12 in an array. The countersunk holes 12 are connected to the fixing holes 11 and are provided one by one. The fixing holes 11 are perpendicular to the plane direction of the base 1 and penetrate the upper and lower surfaces of the base 1. The diameter of the countersunk holes 12 is larger than the diameter of the fixing holes 11 and is provided above the fixing holes 11. The lower end of the fixing sleeve 3 can be inserted into the countersunk holes 12, and the fixing screw 4 can pass through the fixing hole 11 from bottom to top and be threadedly connected with the lower end of the fixing sleeve 3. The lower end of the fixing screw 4 is fixed with an end block 41 having a diameter larger than the fixing hole 11. Through the cooperation of the fixing screw 4 and the fixing sleeve 3, the fixing sleeve 3 can be fixed on the machine. In order to facilitate the threaded connection between the fixing screw 4 and the fixing sleeve 3, the fixing sleeve 3 is preferably set to a polygonal structure, and the countersunk holes 12 and the outer wall of the fixing sleeve 3 are correspondingly set to polygonal holes. Through this plug-in cooperation mode, the rotation of the fixing sleeve 3 can be limited, thereby improving the assembly efficiency.

[0034] Reference Figure 2 and Figure 2 The reinforcement rod 2 includes a plurality of construction segments 21 connected end to end, and each construction segment 21 is connected by an assembly 5; the bottom of the reinforcement rod 2 is connected to an end of the fixing sleeve 3 away from the fixing screw 4, and by fixing a plurality of reinforcement rods 2 to any fixing sleeve 3, it can be adapted to concrete specimens of different shapes; the reinforcement rod 2 is formed by connecting the construction segments 21 through the assembly 5, and the length of the reinforcement rod 2 can be continuously extended through the assembly 5 as the specimen is printed layer by layer, thereby realizing synchronous reinforcement in the concrete 3D printing process; the overall mechanical properties of 3D printed concrete are effectively improved, thereby expanding the application scope of 3D printed concrete.

[0035] Optionally, in order to facilitate the anchoring of the fixing screw 4 into the fixing hole 11 from bottom to top, a pillar of a certain height needs to be provided below the base 1. At the same time, in order to make the reinforcement position accurate and improve the reinforcement efficiency, a scale ruler can also be provided on the surface of the base 1, and the scale ruler can be provided circumferentially along the edge of the substrate.

[0036] Reference Figure 2 and Figure 3 In the embodiment of the present application, the main body of the construction segment 21 is a steel bar, and the outer walls at both ends thereof are provided with external threads, that is, it can be provided as a threaded rod or a double-headed screw. Correspondingly, the upper surface of the fixed sleeve 3 is provided with a first thread groove for threaded connection of the construction segment 21, so that the construction segment 21 located at the bottom can be stably fixed on the fixed sleeve 3. In this embodiment, the assembly 5 is a first connecting sleeve 51, and the upper and lower ends of the first connecting sleeve 51 are provided with second thread grooves for threaded connection of the end of the construction segment 21, and preferably, the threads in the second thread grooves at both ends of the first connecting sleeve 51 are opposite in direction, so that two adjacent construction segments 21 can be firmly connected.

[0037] The implementation principle of this embodiment is as follows: when printing a concrete specimen, first insert a number of fixing sleeves 3 into the countersunk holes 12 according to the structure of the specimen to be printed, then anchor the fixing screw 4 into the fixing hole 11, and threadedly connect it with the fixing sleeve 3; then thread the construction section 21 onto the fixing sleeve 3, and then start printing; during the printing process, the construction section 21 is connected in sequence through the first connecting sleeve 51 as the printing progresses; after printing is completed, unscrew the fixing screw 4, and then the printed concrete specimen can be removed. In the above manner, the fixing sleeve 3 and the fixing screw 4 can achieve stable anchoring, and at the same time, the reinforcing rod 2 is inserted into the concrete specimen, and the continuous and tight reinforcement realizes the longitudinal interlayer force transmission, while greatly reducing the influence and damage of the steel bars on the specimen morphology.

[0038] Embodiment 2: The difference between the embodiment of the present application and the first embodiment is that the connection method of two adjacent construction segments 21 is different.

[0039] Reference Figure 4 and Figure 5In the embodiment of the present application, the assembly 5 includes a plug block 52 fixed to one end of the construction section 21, and a socket block 53 fixed to the other end of the construction section 21. The diameter of the plug block 52 gradually decreases in the direction away from the construction section 21, and at the connection between the plug block 52 and the construction section 21, the diameter of the plug block 52 is larger than the diameter of the construction section 21; the end surface of the socket block 53 is provided with a socket for the plug block 52 to be inserted through interference, and the socket block 53 has elastic deformation ability, the plug block 52 can be inserted through interference into the socket, and the plug block 52 forms a limit between the side wall of the construction section 21 and the inner wall of the socket, thereby forming a tight connection. Correspondingly, the upper surface of the fixed sleeve 3 is also provided with a socket for the plug block 52 to be inserted.

[0040] In the embodiment of the present application, when printing the concrete specimen, the fixing sleeve 3 is first fixed to the base 1 by the fixing screw 4, and then the plug block 52 on one of the building segments 21 is inserted into the fixing sleeve 3, and the plug block 52 and the socket block 53 are matched in turn to connect multiple building segments 21 to perform reinforcement. In this way, the connection speed of the reinforcement rod 2 is faster, and the processing efficiency is improved.

[0041] In other embodiments, the plug-in block 52 and the socket block 53 may also be snap-fitted via a mortise and tenon structure.

[0042] Embodiment three: The difference between the embodiment of the present application and the above embodiment is that a transverse connecting rod 6 is added to form a three-dimensional grid system. Figure 6 Specifically, two adjacent reinforcing rods 2 are connected by a transverse connecting rod 6, and the transverse connecting rod 6 and the reinforcing rod 2 are connected by a combination. In this embodiment, the assembly 5 is a second connecting sleeve 54, which includes a straight connecting section arranged along the vertical direction and a side connecting section fixed on the side wall of the straight connecting section. The number of the side connecting sections can be set according to actual needs.

[0043] The connection method between the second connecting sleeve 54 and the construction section 21 and the transverse connecting rod 6 can be a threaded connection, or can be fixed by plugging, etc., and threaded connection is taken as an example below. External threads are also set at both ends of the construction section 21. The second connecting sleeve 54 has third thread grooves at the upper and lower ends of the direct connection section respectively. The construction section 21 can be threadedly connected in the third thread groove. The upper end of the fixed sleeve 3 also has a thread groove for threading the construction section 21; at the same time, the side connection section end of the second connecting sleeve 54 has a fourth thread groove for threading the transverse connecting rod 6.

[0044] Embodiment 4: The difference between the embodiment of the present application and the above embodiment is that a sealing assembly 7 is added to close the counterbore 12. Figure 7 and Figure 8Specifically, the sealing assembly 7 includes a sealing column 71, a positioning member 72 and an unlocking member 73. Figure 2 and Figure 6 , wherein the sealing column 71 includes a first column 711 and a second column 712. The shape of the first column 711 is adapted to the countersunk hole 12. The main part of the first column 711 can be a metal structure. In order to better seal the countersunk hole 12, an elastic cushion layer and other structures can be circumferentially arranged on the outer wall of the first column 711; the second column 712 is connected to the lower end of the first column 711, and its shape is adapted to the fixing hole 11.

[0045] The positioning member 72 includes a positioning block 721 that is slidably inserted into the second column 712, and a positioning spring 722 that drives the end of the positioning block 721 to slide out of the side wall of the second column 712. The positioning block 721 can be a rectangular block, and is preferably arranged along the length direction perpendicular to the second column 712. A corresponding slide groove for the positioning block 721 to slide is provided in the second column 712. The positioning spring 722 is arranged in the slide groove and can drive the end of the positioning block 721 to slide out of the side wall of the second column 712. Optionally, a limit block can also be provided on the side wall of the positioning block 721 to prevent the positioning block 721 from sliding out of the second column 712. A guide slope is provided on the side of the positioning block 721 that is away from the axis of the first column 711, and the guide slope is inclined downward. When the second column 712 is inserted into the fixing hole 11, the guide slope abuts against the base 1 and can slide into the slide groove under force; when the end of the second column 712 passes through the fixing hole 11, the positioning spring 722 can drive the positioning block 721 to slide out of the second column 712, and the side wall of the positioning block 721 abuts against the lower surface of the base 1, so that the sealing column 71 can be fixed in the counterbore 12 and the fixing hole 11. In order to improve the stability of positioning, multiple positioning blocks 721 can be provided.

[0046] The unlocking member 73 includes an unlocking rod 731, a pressing head 732, a linkage rope 733 and a reset spring 734, wherein the unlocking rod 731 is slidably inserted into the second column 712 along the length direction of the second column 712, and the lower end of the unlocking rod 731 passes through the second column 712 and is connected to the pressing head 732. The other end of the unlocking rod 731 is inserted into the second column 712, and the second column 712 is provided with a slot for the unlocking rod 731 to slide and insert along its own length direction. At the same time, a receiving slot for accommodating the reset spring 734 can also be provided in the slot, and the diameter of the receiving slot is preferably smaller than the slot. The reset spring 734 is connected to one end of the unlocking rod 731 away from the pressing head 732; one end of the connecting rope is connected to one end of the positioning block 721 facing the axis direction of the second column 712, and the other end is connected to the unlocking rod 731.

[0047] When it is necessary to unlock the sealing column 71, it is only necessary to press the pressing head 732 upwards to drive the unlocking rod 731 to move upwards, at which time the linkage rope 733 can be driven to move, thereby driving the fixed block to slide into the second column 712, thereby unlocking the fixed block; when the unlocking rod 731 is pressed to abut the bottom wall of the slot, the fixed block slides completely into the slide groove, and then the pressing head 732 is continuously pressed to drive the entire sealing column 71 to move upwards until it is out of the groove; release the pressing block, and the pressing block and the fixed block can move and reset under the action of the reset spring 734 and the positioning spring 722.

[0048] Embodiment five: The embodiment of the present application discloses a 3D printing concrete reinforcement method, which adopts the 3D printing concrete reinforcement device in the above embodiment, including: Step 1, bottom anchoring: Apply a proper amount of lubricating oil on the surface of the base 1, the corresponding countersunk holes 12 where the fixing sleeves 3 need to be placed, and the fixing blocks 11 to prevent the 3D printed concrete from sticking to the surface of the device and facilitate demoulding after the specimen is formed; then, insert a number of fixing sleeves 3 on the base 1 as required, insert the fixing screws 4 and thread them together with the fixing sleeves 3, and then fix the construction section 21 on the fixing sleeves 3, thereby forming a bottom anchor on the base 1; Step 2: Material filling: Place the 3D printing concrete in the material storage chamber of the 3D printer, adjust the print head to the starting point, and prepare to start printing; Step 3, material printing: start the 3D printer to extrude at least one layer of material onto the base 1, leaving the end of the building section 21 open; Step 4, arranging steel bars: pausing the 3D printer, and connecting the next construction section 21 through the assembly 5; Step 5, material shaping: repeat steps 3 and 4, continue to extrude materials to cover the previous materials and the construction section 21, until the specimen is prepared, the last layer, no assembly 5 is set, and the construction section 21 is covered to complete the interlayer reinforcement; Step 6, demolding and curing: remove the bottom fixing screw 4, take out the specimen, and place the specimen in a standard curing room for curing. Remove the fixing screw 4. This process should avoid damaging the morphology of the specimen.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A 3D printing concrete reinforcement device, characterized in that: It comprises a base (1), a reinforcement rod (2), a fixing sleeve (3) and a fixing screw (4); The surface of the base (1) is provided with a plurality of fixing holes (11) and a plurality of countersunk holes (12) in an array. The countersunk holes (12) are connected to the fixing holes (11) and are provided one by one. The diameter of the countersunk holes (12) is larger than the diameter of the fixing holes (11). The fixing holes (11) are perpendicular to the plane direction of the base (1) and penetrate the base (1). The fixing sleeve (3) can be inserted into the countersunk hole (12). The fixing screw (4) can pass through the fixing hole (11) and be threadedly connected to one end of the fixing sleeve (3). An end block (41) having a diameter larger than that of the fixing hole (11) is provided at one end of the fixing screw (4) away from the fixing sleeve (3). The reinforcement rod (2) comprises a plurality of structural sections (21) connected end to end. The structural sections (21) are connected via an assembly (5). The bottom of the reinforcement rod (2) is connected to one end of the fixing sleeve (3) away from the fixing screw (4).

2. The 3D printing concrete reinforcement device according to claim 1, characterized in that: The fixing sleeve (3) is a polygonal structure, and the countersunk hole (12) is a corresponding polygonal hole.

3. The 3D printing concrete reinforcement device according to claim 2, characterized in that: Both ends of the construction section (21) are provided with external threads, and the end of the fixing sleeve (3) is provided with a first thread groove for threaded connection of the construction section (21). The assembly (5) is a first connecting sleeve (51), and both ends of the first connecting sleeve (51) are provided with second thread grooves for threaded connection of the construction section (21), and the threads in the second thread grooves at both ends of the first connecting sleeve (51) have opposite rotation directions, and the construction section (21) can be threadedly connected in the first thread groove or the second thread groove.

4. The 3D printing concrete reinforcement device according to claim 2, characterized in that: The assembly (5) comprises a plug-in block (52) arranged at one end of the construction section (21), and a socket block (53) arranged at the other end of the construction section (21); the diameter of the plug-in block (52) gradually decreases in a direction away from the construction section (21), and the diameter of the plug-in block (52) at the connection between the plug-in block (52) and the construction section (21) is larger than that of the construction section (21); the end surface of the socket block (53) is provided with a socket slot for interference insertion of the plug-in block (52), and the plug-in block (52) has elastic deformation capability.

5. The 3D printing concrete reinforcement device according to claim 2, characterized in that: It also comprises a plurality of transverse connecting rods (6), two adjacent reinforcing rods (2) are connected via the transverse connecting rods (6), and the reinforcing rods (2) and the transverse connecting rods (6) are connected via the assembly (5).

6. The 3D printing concrete reinforcement device according to claim 5, characterized in that: Both ends of the construction section (21) are provided with external threads. The assembly (5) is a second connecting sleeve (54). The second connecting sleeve (54) is composed of a straight connecting section arranged along the vertical direction and a side connecting section arranged on the side wall of the straight connecting section. The upper and lower ends of the straight connecting section of the second connecting sleeve (54) are provided with third thread grooves for threaded connection to the construction section (21); both ends of the transverse connecting rod (6) are provided with external threads. The end of the side connecting section of the second connecting sleeve (54) is provided with a fourth thread groove for threaded connection to the transverse connecting rod (6).

7. The 3D printing concrete reinforcement device according to any one of claims 2 to 6, characterized in that: The invention also comprises a sealing assembly (7) for closing the counterbore (12), wherein the sealing assembly (7) comprises a sealing column (71), a positioning member (72) and an unlocking member (73), wherein the sealing column (71) can be inserted into the counterbore (12) and seal the counterbore (12), and when the sealing column (71) is inserted into the counterbore (12), the positioning member (72) can limit the upward movement of the sealing column (71); and the unlocking member (73) can unlock the positioning member (72).

8. The 3D printing concrete reinforcement device according to claim 7, characterized in that: The sealing column (71) comprises a first column (711) whose shape matches that of the countersunk hole (12), and a second column (712) whose shape matches that of the fixing hole (11); the positioning member (72) comprises a positioning block (721) slidably inserted into the second column (712), and a positioning spring (722) for driving an end of the positioning block (721) to slide out of a side wall of the second column (712); a side of the positioning block (721) facing away from the first column (711) is provided with a A guide bevel is provided, and when the second column (712) is inserted into the fixing hole (11), the guide bevel abuts against the base (1) and is forced to slide into the second column (712); when the end of the second column (712) passes through the fixing hole (11), the positioning spring (722) can drive the positioning block (721) to slide out of the second column (712), and the side wall of the positioning block (721) abuts against the side wall of the base (1) facing away from the reinforcement rod (2).

9. The 3D printing concrete reinforcement device according to claim 8, characterized in that: The unlocking member (73) comprises an unlocking rod (731), a pressing head (732), a linkage rope (733) and a return spring (734); the unlocking rod (731) is slidably inserted into the second column (712) along the length direction of the second column (712); one end of the unlocking rod (731) passes through the second column (712) and is connected to the pressing head (732); the other end of the unlocking rod (731) is inserted into the second column (712); the return spring (734) The spring is arranged in the second column (712) and is connected to one end of the unlocking rod (731) away from the pressing head (732); one end of the connecting rope is connected to the positioning block (721), and the other end is connected to the unlocking rod (731); when the pressing head (732) is pressed toward the first column (711), the unlocking rod (731) drives the positioning block (721) to slide into the second column (712) through the connecting rope, and the spring is in a compressed state at this time.

10. A 3D printing concrete reinforcement method, according to the 3D printing concrete reinforcement device according to any one of claims 1 to 9, characterized in that: include: Step 1, bottom anchoring: inserting a plurality of the fixing sleeves (3) on the base (1), then inserting a fixing screw (4) and threading it with the fixing sleeve (3), and then fixing the construction section (21) on the fixing sleeve (3), thereby forming a bottom anchoring on the base (1); Step 2: Material filling: placing the 3D printing concrete into the material storage chamber of the 3D printer; Step 3, material printing: start the 3D printer to extrude at least one layer of material onto the base (1), leaving the end of the building section (21) open; Step 4, arranging the steel bars: pausing the 3D printer and connecting the next construction section (21) through the assembly (5); Step 5, material shaping: repeating steps 3 and 4, continuing to extrude the material to cover the previous material and the building section (21), until the specimen is prepared, the last layer, no longer setting the assembly (5), and covering the building section (21); Step 6, demoulding and curing: remove the bottom fixing screw (4), remove the specimen, and place the specimen in a standard curing room for curing. Remove the fixing screw (4). This process should avoid damaging the morphology of the specimen.

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