A 3D printing device for construction

Abstract

The present invention discloses a 3D printing device for construction, which belongs to the technical field of 3D printing. A printing table is fixedly arranged between the bases of the lifting cylinder, and a spray mechanism is movably arranged on a moving vehicle; a conical vertical nozzle is arranged at the bottom of the outer shell, and a penetrating side discharge cavity is provided on the outer wall of the outer shell, a door panel for opening and closing the side discharge cavity is slidably arranged in the first storage cavity, and a through groove communicating with a rotating cavity is provided on the top of the side discharge cavity and the second storage cavity; the unloading mechanism includes a plurality of lifting arms movably arranged in the sliding cavity; a lifting swing arm is movably arranged at the bottom of the printing table, and a lifting plate cooperating with the lifting arm is fixedly arranged on the top of the lifting swing arm. The present invention can freely move the position of the spray mechanism through an adjusting mechanism, and can convert the vertical nozzle and the horizontal nozzle through a door panel and a conversion gear ring. The unloading mechanism can quickly unload the parts after printing, and this design improves the unloading efficiency of the 3D printing device for construction.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, in particular to a 3D printing device for construction. Background Art

[0002] 3D printing, also known as additive manufacturing technology, is a technology that manufactures physical parts by accumulating materials layer by layer based on three-dimensional CAD data. The historical development of 3D printing technology is a process of continuous progress and expansion. From early rapid prototyping technology to today's widespread application, 3D printing technology has been used in design and manufacturing fields such as jewelry design, footwear design and manufacturing, industrial design, architectural design, engineering design and construction, automotive design and manufacturing, as well as medical fields such as aerospace and dentistry. At present, the application of 3D printing technology in construction is still in its infancy, mainly because the strength and earthquake resistance of the buildings it prints are limited. Therefore, applying 3D printing technology to small building components is a future trend.

[0003] The patent application with publication number CN117309879A discloses a construction 3D printing concrete working performance test system and use method. The present invention uses visual analysis technology to compare the current material status photo taken with the previous photo and the reference photo respectively, calculate the similarity of the photos, and thus obtain the material extrusion stability and output quality. It uses a device installed between the auger and the output shaft of the extrusion motor to measure the reaction force of the material on the auger, and uses a material extrusion stability judgment scheme to deduce the current viscosity of the material, and at the same time, it can determine whether the nozzle has material breakage or blockage. The device has built-in multiple standard experimental procedures, allowing users to test the extrudability, buildability and printability of concrete. Through the coordinated use of the material control auxiliary mechanism and the feeding auxiliary component set in the silo, the material feeding is flexibly regulated to improve work flexibility and meet actual work needs.

[0004] However, the degree of freedom of the architectural 3D printing device disclosed above is general, the nozzle can only print in the vertical direction, and the degree of automation is general, and the components after printing cannot be automatically unloaded and transported, and an efficient automatic unloading structure is lacking. Summary of the invention

[0005] The purpose of the present invention is to provide a 3D printing device for construction in order to solve the problems that the existing construction 3D printing devices have a general degree of freedom, the nozzle can only print in the vertical direction, the degree of automation is general, the components after printing cannot be automatically unloaded and transported, and there is a lack of an efficient automatic unloading structure.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a 3D printing device for construction, comprising an adjusting mechanism, an ejecting mechanism and a feeding mechanism; the adjusting mechanism comprises two sets of lifting cylinders that cooperate with each other, and a printing table is fixedly arranged between the bases of the lifting cylinders; a symmetrical horizontal frame is arranged at the output end of the lifting cylinder, and a moving frame is movably arranged between the horizontal frames, and a moving vehicle is threadedly connected to the bottom of the moving frame, and a mounting cavity that cooperates with the outer shell is also provided on the moving vehicle, and the ejecting mechanism is movably arranged in the mounting cavity on the moving vehicle; the ejecting mechanism comprises an outer shell, a conical top cover is installed on the top of the outer shell, and a conical vertical nozzle is provided at the bottom of the outer shell; a penetrating side discharge cavity is provided on the outer wall of the outer shell, and a nozzle located in the inner part of the outer shell is provided There are storage chambers 1 and 2 on both sides of the side discharge chamber; a door panel for opening and closing the side discharge chamber is slidably arranged in the storage chamber 1, and a plurality of arc-shaped reset parts are connected to the inner side of the door panel; a rotating chamber located above the side discharge chamber is also provided on the outer wall of the outer shell, and a through groove connected to the rotating chamber is provided on the top of the side discharge chamber and the storage chamber 2; a plurality of sliding chambers penetrating therethrough are provided on the printing table, and the unloading mechanism includes a plurality of lifting arms movably arranged in the sliding chamber; a lifting swing arm is movably arranged at the bottom of the printing table, and a lifting plate cooperating with the lifting arm is fixedly arranged on the top of the lifting swing arm; a unloading cylinder is also fixedly installed at the bottom of the printing table, and an engaging frame is provided at the end of the lifting swing arm, and the output end of the unloading cylinder is movably arranged in the engaging frame.

[0007] As a further solution of the present invention: a threaded rod 1 is rotatably arranged inside the horizontal frame, and a first motion motor connected to the threaded rod 1 is also installed on the outer side of the horizontal frame; multiple groups of threaded rods 2 are movably arranged at the bottom of the motion frame, and a second motion motor connected to the threaded rod 2 is also installed on the side of the motion frame.

[0008] As a further solution of the present invention: a rotating ring gear is also installed on the outer shell, a rotating motor is also installed on the bottom of the sports car, and a driving gear 1 meshing with the rotating ring gear is installed at the output end of the rotating motor.

[0009] As a further solution of the present invention: a conversion gear ring is rotatably arranged in the rotating chamber, the bottom of the conversion gear ring is fixedly connected with a vertical plate slidably arranged in the through groove, and the side of the vertical plate is fixedly arranged with a driving arc arm cooperating with the door panel; a moving feed plug is slidably installed inside the outer shell, the top of the moving feed plug is provided with an annular feed trough, the bottom of the annular feed trough is provided with a penetrating vertical discharge trough, and the middle of the vertical discharge trough is provided with a horizontal discharge trough cooperating with the side discharge chamber; when the conversion gear ring rotates, the vertical nozzle and the side discharge chamber can be converted.

[0010] As a further solution of the present invention: a slurry pipe is connected to the top of the top cover, and an annular air injection mechanism is installed on the inner wall of the top cover, and the air injection mechanism is located above the annular feed chute.

[0011] As a further solution of the present invention: a moving frame cooperating with the side discharge chamber is fixedly arranged at the bottom of the conversion gear ring, and a horizontal nozzle is fixedly installed on the side wall of the moving frame; a mounting boss is also arranged on the outer wall of the outer shell, a conversion motor is installed below the mounting boss, and a driving gear 2 meshing with the conversion gear ring is installed at the output end of the conversion motor.

[0012] As a further solution of the present invention: an extrusion groove connected to the second storage chamber is provided inside the outer shell, and the bottom of the extrusion groove is connected to a linkage groove facing inward; a vertical extrusion rod is slidably installed in the extrusion groove, and a horizontal extrusion rod is slidably installed in the linkage groove; symmetrical reset grooves are provided on both sides of the linkage groove, and both sides of the horizontal extrusion rod are provided with a convex plate 1 slidably arranged in the reset groove, and a reset spring 2 is connected to the outer side of the convex plate 1, and the convex plate 1 is connected to the inner wall of the reset groove through the reset spring 2.

[0013] As a further solution of the present invention: a symmetrical limiting column is arranged on the top of the top cover, and the limiting column is a hollow structure; a sliding rod slidably arranged in the limiting column is fixedly arranged on the top of the movable discharge plug, and a return spring is sleeved on the sliding rod.

[0014] As a further solution of the present invention: a swing plate is movably installed on the top of the lifting arm, a push rod is movably arranged inside the lifting arm, a symmetrical limiting arm is arranged on the top of the push rod, and the bottom of the push rod extends out of the bottom of the lifting arm; a plurality of groups of convex plates 2 are arranged on the outer wall of the lifting arm, a plurality of groups of reset springs 3 are connected to the convex plates 2, and the lifting arm is connected to the bottom of the printing table through the reset springs 3.

[0015] As a further solution of the present invention: a conveyor belt is also provided on the side of the printing table.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can freely move the position of the injection mechanism through the adjustment mechanism, and can switch the vertical nozzle and the horizontal nozzle through the cooperation of the door plate and the conversion gear ring, so as to achieve different printing directions. When the conversion gear ring rotates clockwise, the driving arc arm squeezes the door plate and retracts it into the storage chamber one. After the driving arc arm is separated from the vertical extrusion rod, the horizontal extrusion rod retracts into the linkage groove under the action of the reset spring two. Therefore, during the printing operation, the bottom of the moving discharge plug completely abuts against the inner wall of the tapered vertical nozzle and blocks the vertical nozzle. At this time, the printing material is directly injected into the horizontal nozzle through the horizontal discharge groove. When the conversion gear ring rotates counterclockwise, the driving arc arm retracts into the storage chamber two, and at this time, the door plate closes the side discharge chamber under the action of the reset member. After the driving arc arm squeezes the vertical extrusion rod, the horizontal extrusion rod moves inward along the linkage groove and supports the moving discharge plug. Therefore, during printing, the bottom of the moving discharge plug cannot completely abut against the inner wall of the vertical nozzle, and the inner wall of the outer shell blocks the horizontal discharge slot. At this time, the printing material is directly injected into the vertical nozzle through the vertical discharge slot, and this design improves the degree of freedom of the architectural 3D printing device.

[0018] 2. The present invention can quickly unload the printed parts through the unloading mechanism. When the unloading cylinder moves upward, under the linkage of the lifting swing arm, the lifting plate will move upward obliquely and squeeze the lifting arm and the push rod. Since the lifting arm extends out of the bottom of the push rod, the push rod will lift the swing plate upward and tilt it toward the outer conveyor belt. And because the lifting plate moves upward obliquely, the heights of the two sets of lifting arms on the outside are slightly lower than the two sets of lifting arms on the inside. At this time, the building components are lifted and slide into the conveyor belt. This design improves the unloading efficiency of the building 3D printing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 It is a partial three-dimensional structural diagram of the adjustment mechanism in the present invention;

[0022] Figure 3 It is a three-dimensional structural diagram of the injection mechanism in the present invention;

[0023] Figure 4 It is a partial cross-sectional view of the outer shell in the horizontal direction of the present invention. Figure 1 ;

[0024] Figure 5 is a partial cross-sectional view of the outer shell in the vertical direction of the present invention;

[0025] Figure 6 is a cross-sectional view of the injection mechanism of the present invention;

[0026] Figure 7 It is a three-dimensional internal structure diagram of the injection mechanism in the present invention;

[0027] Figure 8 yes Figure 7 A magnified view of the structure at center A;

[0028] Fig. 9 It is a three-dimensional structural diagram of the conversion gear ring in the present invention;

[0029] Fig.10 It is a partial cross-sectional view of the outer shell in the horizontal direction of the present invention. Figure 2 ;

[0030] Fig.11 It is a three-dimensional structural diagram of the feeding mechanism in the present invention;

[0031] Fig.12 It is a cross-sectional view of the lifting arm in the present invention.

[0032] Description of reference numerals:

[0033] 1. Adjustment mechanism; 101. Lifting cylinder; 102. Printing table; 103. Horizontal frame; 104. Threaded rod one; 105. First motion motor; 106. Motion frame; 107. Threaded rod two; 108. Second motion motor; 109. Motion vehicle; 110. Installation cavity; 111. Rotating motor; 112. Driving gear one; 113. Sliding cavity; 114. Conveyor belt; 2. Injection mechanism; 201. Outer shell; 202. Top cover; 203. Slurry pipe; 204. Rotating gear ring; 205. Vertical nozzle; 206. Movable feeding plug; 207. Limiting column; 208. Sliding rod; 209. Reset spring one; 210. Gas injection mechanism; 211. Annular feeding trough; 212. Vertical discharging trough; 213. Horizontal discharging trough; 214. Side discharging cavity; 215. Storage chamber one; 216, door panel; 217, reset piece; 218, storage chamber two; 219, rotating chamber; 220, through slot; 221, conversion gear ring; 222, vertical plate; 223, driving arc arm; 224, mounting boss; 225, conversion motor; 226, driving gear two; 227, motion frame; 228, horizontal nozzle; 229, extrusion slot; 230, linkage slot; 231, vertical extrusion rod; 232, horizontal extrusion rod; 233, reset slot; 234, convex plate one; 235, reset spring two; 3, unloading mechanism; 301, lifting swing arm; 302, unloading cylinder; 303, meshing frame; 304, lifting plate; 305, lifting arm; 306, swing plate; 307, push rod; 308, limit arm; 309, convex plate two; 310, reset spring three. DETAILED DESCRIPTION

[0034] The following will be combined with the attached Figures 1 to 12 The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides a 3D printing device for construction by improvement, such as Figure 1-Figure 12 As shown, it includes an adjustment mechanism 1, an injection mechanism 2 and a feeding mechanism 3; the adjustment mechanism 1 includes two sets of lifting cylinders 101 that cooperate with each other, and a printing table 102 is fixedly arranged between the bases of the lifting cylinders 101; a symmetrical horizontal frame 103 is arranged at the output end of the lifting cylinder 101, and a moving frame 106 is movably arranged between the horizontal frames 103, and a moving vehicle 109 is threadedly connected to the bottom of the moving frame 106, and the moving vehicle 109 is also provided with an installation cavity 110 that cooperates with the outer shell 201, and the injection mechanism 2 is movably arranged on The installation cavity 110 on the sports car 109; the injection mechanism 2 includes an outer shell 201, a conical top cover 202 is installed on the top of the outer shell 201, and a conical vertical nozzle 205 is arranged at the bottom of the outer shell 201; a through side discharge cavity 214 is opened on the outer wall of the outer shell 201, and a storage cavity 1 215 and a storage cavity 218 are opened on both sides of the side discharge cavity 214 inside the outer shell 201; a door panel 216 for opening and closing the side discharge cavity 214 is slidably arranged in the storage cavity 1 215, and the door panel The inner side of the outer shell 201 is connected with a plurality of arc-shaped reset members 217; the outer wall of the outer shell 201 is also provided with a rotating chamber 219 located above the side discharge chamber 214, and the top of the side discharge chamber 214 and the storage chamber 218 is provided with a through slot 220 connected to the rotating chamber 219; a conversion gear ring 221 is rotatably arranged in the rotating chamber 219, and a vertical plate 222 slidably arranged in the through slot 220 is fixedly connected to the bottom of the conversion gear ring 221, and a driving arc arm 223 cooperating with the door panel 216 is fixedly arranged on the side of the vertical plate 222 ; A plurality of groups of penetrating sliding cavities 113 are provided on the printing table 102, and the unloading mechanism 3 includes a plurality of groups of lifting arms 305 movably arranged in the sliding cavities 113; a lifting swing arm 301 is movably arranged at the bottom of the printing table 102, and a lifting plate 304 cooperating with the lifting arm 305 is fixedly arranged on the top of the lifting swing arm 301; a unloading cylinder 302 is also fixedly installed at the bottom of the printing table 102, and an engaging frame 303 is arranged at the end of the lifting swing arm 301, and the output end of the unloading cylinder 302 is movably arranged in the engaging frame 303.

[0036] In this embodiment: the 3D printing device for construction is mainly divided into three parts: an adjustment mechanism 1, an ejection mechanism 2 and a feeding mechanism 3. The adjustment mechanism 1 is used to adjust the degree of freedom of the ejection mechanism 2, wherein the lifting cylinder 101, the first motion motor 105 and the second motion motor 108 cooperate with each other to adjust the movement of the ejection mechanism 2 in the XYZ direction, and the rotating gear ring 204 can drive the ejection mechanism 2 to rotate as a whole. When printing is completed, the feeding mechanism 3 can feed and convey the building components. When the device is in use, when the conversion gear ring 221 rotates clockwise, the driving arc arm 223 squeezes the door panel 216 and retracts it into the storage chamber 1 215. When the driving arc arm 223 is separated from the vertical extrusion rod 231, the horizontal extrusion rod 232 retracts into the linkage groove 230 under the action of the return spring 235. Therefore, during the printing operation, the bottom of the moving material plug 206 completely abuts against the inner wall of the tapered vertical nozzle 205 and blocks the vertical nozzle 205, and at this time, the printing material is directly injected into the horizontal nozzle 228 through the horizontal discharge trough 213. When the conversion gear ring 221 rotates counterclockwise, the driving arc arm 223 retracts into the storage chamber 218, and at this time, the door plate 216 closes the side discharge chamber 214 under the action of the reset member 217. After the driving arc arm 223 squeezes the vertical extrusion rod 231, the horizontal extrusion rod 232 moves inward along the linkage groove 230 and supports the moving material plug 206. Therefore, during the printing operation, the bottom of the moving material plug 206 cannot completely abut against the inner wall of the vertical nozzle 205, and the inner wall of the outer shell 201 blocks the horizontal discharge trough 213. At this time, the printing material is directly injected into the vertical nozzle 205 through the vertical discharge trough 212. After printing is completed, the unloading cylinder 302 is started and moved upward. At this time, under the linkage of the lifting swing arm 301, the lifting plate 304 will move obliquely upward and squeeze the lifting arm 305 and the push rod 307. Since the bottom of the push rod 307 extends out of the lifting arm 305, the push rod 307 will lift the swing plate 306 upward and tilt it toward the outer conveyor belt 114. And because the lifting plate 304 moves obliquely upward, the heights of the two sets of lifting arms 305 on the outside are slightly lower than the two sets of lifting arms 305 on the inside. Under the support of the lifting arm 305 and the swing plate 306, the building components fall onto the conveyor belt 114.

[0037] See attached Figure 1 -Attached Figure 2 The horizontal frame 103 is internally rotatably provided with a threaded rod 104, and the outer side of the horizontal frame 103 is also equipped with a first motion motor 105 connected to the threaded rod 104; the bottom of the motion frame 106 is movably provided with multiple groups of threaded rods 107, and the side of the motion frame 106 is also equipped with a second motion motor 108 connected to the threaded rod 107.

[0038] In this embodiment, in order to freely move the injection mechanism 2 in three directions of X, Y and Z, a lifting cylinder 101, a first motion motor 105 and a second motion motor 108 that cooperate with each other are designed.

[0039] See attached Figure 1 -Attached Figure 2 A rotating ring gear 204 is also installed on the outer shell 201, and a rotating motor 111 is also installed at the bottom of the sports car 109. The output end of the rotating motor 111 is installed with a driving gear 112 that meshes with the rotating ring gear 204.

[0040] In this embodiment, in order to rotate the spray mechanism 2 as a whole and thereby adjust the position of the horizontal nozzle 228, the outer shell 201 is movably arranged in the installation cavity 110 via a bearing (not shown).

[0041] See attached Figure 3 -Attached Figure 6 A movable discharge plug 206 is slidably installed inside the outer shell 201, and an annular discharge trough 211 is provided on the top of the movable discharge plug 206, a vertical discharge trough 212 is provided at the bottom of the annular discharge trough 211, and a horizontal discharge trough 213 cooperating with the side discharge cavity 214 is provided in the middle of the vertical discharge trough 212; when the conversion ring gear 221 rotates, the conversion of the vertical nozzle 205 and the side discharge cavity 214 can be realized.

[0042] In this embodiment: when the conversion gear ring 221 rotates clockwise, the driving arc arm 223 squeezes the door plate 216 and retracts it into the storage chamber 1 215. After the driving arc arm 223 is separated from the vertical squeezing rod 231, the horizontal squeezing rod 232 retracts into the linkage groove 230 under the action of the reset spring 235. Therefore, during the printing operation, the bottom of the moving discharge plug 206 completely abuts against the inner wall of the tapered vertical nozzle 205 and blocks the vertical nozzle 205. At this time, the printing material is directly injected into the horizontal nozzle 228 through the horizontal discharge groove 213. When the conversion gear ring 221 rotates counterclockwise, the driving arc arm 223 retracts into the storage chamber 218. At this time, the door plate 216 closes the side discharge chamber 214 under the action of the reset member 217. After the driving arc arm 223 squeezes the vertical squeezing rod 231, the horizontal squeezing rod 232 moves inward along the linkage slot 230 and supports the moving material discharge plug 206. Therefore, during the printing operation, the bottom of the moving material discharge plug 206 cannot completely abut against the inner wall of the vertical nozzle 205, and the inner wall of the outer shell 201 blocks the horizontal material discharge slot 213. At this time, the printing material is directly injected into the vertical nozzle 205 through the vertical material discharge slot 212.

[0043] See attached Figure 6 -Attached Figure 7The top of the top cover 202 is connected to a slurry pipe 203 , and an annular gas injection mechanism 210 is installed on the inner wall of the top cover 202 . The gas injection mechanism 210 is located above the annular feed chute 211 .

[0044] In this embodiment, the gas injection mechanism 210 is connected to an external air blowing device. During the printing operation, the raw material in the annular feed chute 211 is driven by the gas injection mechanism 210 to be accelerated and ejected into the vertical nozzle 205 or the horizontal nozzle 228 .

[0045] See attached Figure 5 , Attachment Figure 7 -Attached Figure 8 and attached Fig.10 An extrusion groove 229 connected to the second storage chamber 218 is provided inside the outer shell 201, and the bottom of the extrusion groove 229 is connected to a linkage groove 230 facing inward; a vertical extrusion rod 231 is slidably installed in the extrusion groove 229, and a horizontal extrusion rod 232 is slidably installed in the linkage groove 230; symmetrical reset grooves 233 are provided on both sides of the linkage groove 230, and convex plates 234 slidably arranged in the reset groove 233 are provided on both sides of the horizontal extrusion rod 232, and the outer side of the convex plate 234 is connected to a reset spring 235, and the convex plate 234 is connected to the inner wall of the reset groove 233 through the reset spring 235.

[0046] In this embodiment: In order to synchronously control the fit between the moving feed plug 206 and the inner wall of the bottom vertical nozzle 205 by driving the sliding of the arc arm 223, a linked vertical extrusion rod 231 and a horizontal extrusion rod 232 are designed. When the driving arc arm 223 squeezes the vertical extrusion rod 231, the vertical extrusion rod 231 moves downward along the extrusion groove 229. Driven by the vertical extrusion rod 231, the horizontal extrusion rod 232 moves inward along the linkage groove 230 and supports the moving feed plug 206, thereby realizing the change of the printing direction. When the lower driving arc arm 223 retracts into the storage chamber 218, the vertical extrusion rod 231 squeezes the horizontal extrusion rod 232 downward, and at this time, the horizontal extrusion rod 232 moves inward and extends out of the inner wall of the outer shell 201 to support the moving feed plug 206.

[0047] See attached Figure 3 -Attached Figure 6 A moving frame 227 cooperating with the side discharge chamber 214 is fixedly arranged at the bottom of the conversion gear ring 221, and a horizontal nozzle 228 is fixedly installed on the side wall of the moving frame 227; a mounting boss 224 is also arranged on the outer wall of the outer shell 201, and a conversion motor 225 is installed below the mounting boss 224, and a driving gear 226 meshing with the conversion gear ring 221 is installed at the output end of the conversion motor 225.

[0048] In this embodiment, a conversion motor 225 is designed to drive the conversion gear ring 221 to rotate and thus change the printing direction.

[0049] See attached Figure 3 and attached Figure 6 A symmetrical limiting column 207 is arranged on the top of the top cover 202, and the limiting column 207 is a hollow structure. A sliding rod 208 slidably arranged in the limiting column 207 is fixedly arranged on the top of the movable feeding plug 206, and a return spring 209 is sleeved on the sliding rod 208.

[0050] In this embodiment, when the moving material plug 206 reciprocates up and down along the outer shell 201, in order to improve its stability and avoid accidental rotation, a mutually cooperating limit column 207 and slide rod 208 structure is designed. When the printing material is injected into the slurry pipe 203 by an external device, the moving material plug 206 moves downward along the outer shell 201 under the impact. When the external slurry injection device is closed, the moving material plug 206 returns to its original position under the action of the return spring 209.

[0051] See attached Figure 1 , Attachment Fig.11 -Attached Fig.12 A swing plate 306 is movably installed on the top of the lifting arm 305, and a push rod 307 is movably arranged inside the lifting arm 305. A symmetrical limiting arm 308 is arranged on the top of the push rod 307, and the bottom of the push rod 307 extends out of the bottom of the lifting arm 305; a plurality of groups of convex plates 309 are arranged on the outer wall of the lifting arm 305, and a plurality of groups of return springs 310 are connected to the convex plates 309, and the lifting arm 305 is connected to the bottom of the printing table 102 through the return springs 310.

[0052] In this embodiment: when the unloading cylinder 302 moves upward, under the linkage of the lifting swing arm 301, the lifting plate 304 will move obliquely upward and squeeze the lifting arm 305 and the push rod 307. Since the bottom of the push rod 307 extends out of the lifting arm 305, the push rod 307 will lift the swing plate 306 upward and tilt it toward the outer conveyor belt 114. And since the lifting plate 304 moves obliquely upward, the heights of the two sets of lifting arms 305 on the outer side are slightly lower than the two sets of lifting arms 305 on the inner side. When the unloading cylinder 302 moves downward, the lifting plate 304 will move obliquely downward and separate from the lifting arm 305 and the push rod 307, and then return to the original position under the action of the return spring 310.

[0053] See attached Figure 1 A conveyor belt 114 is also provided on the side of the printing table 102 .

[0054] In this embodiment, under the action of the unloading mechanism 3, the printed building components fall onto the conveyor belt 114 and undergo subsequent processing.

[0055] Working principle of the present invention: When the device is in use, when the conversion gear ring 221 rotates clockwise, the driving arc arm 223 squeezes the door plate 216 and retracts it into the storage chamber 1 215. After the driving arc arm 223 is separated from the vertical extrusion rod 231, the horizontal extrusion rod 232 retracts into the linkage groove 230 under the action of the reset spring 235. Therefore, during the printing operation, the bottom of the moving discharge plug 206 completely abuts against the inner wall of the tapered vertical nozzle 205 and blocks the vertical nozzle 205. At this time, the printing material is directly injected into the horizontal nozzle 228 through the horizontal discharge groove 213. When the conversion gear ring 221 rotates counterclockwise, the driving arc arm 223 retracts into the storage chamber 218. At this time, the door plate 216 closes the side discharge chamber 214 under the action of the reset member 217. After the driving arc arm 223 squeezes the vertical squeezing rod 231, the horizontal squeezing rod 232 moves inward along the linkage groove 230 and supports the moving material discharge plug 206. Therefore, during the printing operation, the bottom of the moving material discharge plug 206 cannot completely abut against the inner wall of the vertical nozzle 205, and the inner wall of the outer shell 201 blocks the horizontal discharge slot 213. At this time, the printing material is directly injected into the vertical nozzle 205 through the vertical discharge slot 212. When the printing is completed, the material discharge cylinder 302 is started and moved upward. At this time, under the linkage action of the lifting swing arm 301, the lifting plate 304 will move obliquely upward and squeeze the lifting arm 305 and the push rod 307. Since the bottom of the push rod 307 extends out of the lifting arm 305, the push rod 307 will lift the swing plate 306 upward and tilt it toward the direction of the outer conveyor belt 114. And because the lifting plate 304 moves obliquely upward, the heights of the two outer groups of lifting arms 305 are slightly lower than the two inner groups of lifting arms 305. Under the support of the lifting arms 305 and the swing plate 306, the building components fall onto the conveyor belt 114.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A 3D printing device for construction, comprising an adjustment mechanism (1), an ejection mechanism (2) and a material discharge mechanism (3), characterized in that: The regulating mechanism (1) comprises two sets of mutually cooperating lifting cylinders (101), a printing table (102) being fixedly arranged between the bases of the lifting cylinders (101); a symmetrical horizontal frame (103) being arranged at the output end of the lifting cylinders (101), a moving frame (106) being movably arranged between the horizontal frames (103), a moving vehicle (109) being threadedly connected to the bottom of the moving frame (106), and the ejecting mechanism (2) being movably arranged on the moving vehicle (109); The spray mechanism (2) comprises an outer shell (201), a conical top cover (202) is installed on the top of the outer shell (201), and a conical vertical nozzle (205) is arranged at the bottom of the outer shell (201); a through-going side discharge cavity (214) is provided on the outer wall of the outer shell (201), and a first storage cavity (215) and a second storage cavity (218) are provided inside the outer shell (201) and are located on both sides of the side discharge cavity (214); a sliding device is arranged inside the first storage cavity (215). A door panel (216) is provided for opening and closing the side discharge chamber (214); the inner side of the door panel (216) is connected to a plurality of groups of arc-shaped reset members (217); the outer wall of the outer shell (201) is also provided with a rotating chamber (219) located above the side discharge chamber (214); the tops of the side discharge chamber (214) and the second storage chamber (218) are provided with a through groove (220) communicating with the rotating chamber (219); the printing table (102) is provided with a plurality of groups of penetrating sliding chambers (113); The unloading mechanism (3) comprises a plurality of lifting arms (305) movably arranged in the sliding cavity (113); a lifting swing arm (301) is movably arranged at the bottom of the printing table (102), and a lifting plate (304) cooperating with the lifting arm (305) is fixedly arranged on the top of the lifting swing arm (301); a unloading cylinder (302) is also fixedly installed at the bottom of the printing table (102), an engaging frame (303) is arranged at the end of the lifting swing arm (301), and an output end of the unloading cylinder (302) is movably arranged in the engaging frame (303).

2. A 3D printing device for construction according to claim 1, characterized in that: The horizontal frame (103) is internally rotatably provided with a threaded rod (104), and the outer side of the horizontal frame (103) is also provided with a first motion motor (105) connected to the threaded rod (104); the bottom of the motion frame (106) is movably provided with a plurality of groups of threaded rods (107), and the side of the motion frame (106) is also provided with a second motion motor (108) connected to the threaded rods (107).

3. A 3D printing device for construction according to claim 1, characterized in that: The sports vehicle (109) is also provided with a mounting cavity (110) that cooperates with the outer shell (201), and a rotating ring gear (204) is also installed on the outer shell (201). A rotating motor (111) is also installed at the bottom of the sports vehicle (109), and a driving gear 1 (112) that meshes with the rotating ring gear (204) is installed at the output end of the rotating motor (111).

4. A 3D printing device for construction according to any one of claims 1 to 3, characterized in that: A conversion gear ring (221) is rotatably arranged in the rotating chamber (219); a vertical plate (222) slidably arranged in the through groove (220) is fixedly connected to the bottom of the conversion gear ring (221); a driving arc arm (223) cooperating with the door plate (216) is fixedly arranged on the side of the vertical plate (222); a movable discharge plug (206) is slidably installed inside the outer shell (201); an annular discharge trough (211) is provided on the top of the movable discharge plug (206); a vertical discharge trough (212) penetrating therethrough is provided at the bottom of the annular discharge trough (211); a horizontal discharge trough (213) cooperating with the side discharge chamber (214) is provided in the middle of the vertical discharge trough (212); when the conversion gear ring (221) rotates, the vertical nozzle (205) and the side discharge chamber (214) can be switched.

5. A 3D printing device for construction according to claim 4, characterized in that: The top of the top cover (202) is connected to a slurry pipe (203), and an annular gas injection mechanism (210) is installed on the inner wall of the top cover (202), and the gas injection mechanism (210) is located above the annular material discharge chute (211).

6. A 3D printing device for construction according to claim 4, characterized in that: A moving frame (227) cooperating with the side discharge cavity (214) is fixedly arranged at the bottom of the conversion gear ring (221), and a horizontal nozzle (228) is fixedly installed on the side wall of the moving frame (227); a mounting boss (224) is also arranged on the outer wall of the outer shell (201), a conversion motor (225) is installed below the mounting boss (224), and a driving gear 2 (226) meshing with the conversion gear ring (221) is installed at the output end of the conversion motor (225).

7. A 3D printing device for construction according to any one of claims 1 to 3, characterized in that: The outer shell (201) is provided with an extrusion groove (229) in communication with the second storage cavity (218), and the bottom of the extrusion groove (229) is connected with a linkage groove (230) facing inward; a vertical extrusion rod (231) is slidably installed in the extrusion groove (229), and a horizontal extrusion rod (232) is slidably installed in the linkage groove (230); symmetrical reset grooves (233) are provided on both sides of the linkage groove (230), and convex plates (234) slidably installed in the reset grooves (233) are provided on both sides of the horizontal extrusion rod (232), and the outer side of the convex plate (234) is connected with a second reset spring (235), and the convex plate (234) is connected to the inner wall of the reset groove (233) through the second reset spring (235).

8. A 3D printing device for construction according to claim 4, characterized in that: The top of the top cover (202) is provided with symmetrical limiting columns (207), and the limiting columns (207) are hollow structures. The top of the movable feed plug (206) is fixedly provided with a sliding rod (208) slidably arranged in the limiting columns (207), and the sliding rod (208) is sleeved with a return spring 1 (209).

9. A 3D printing device for construction according to any one of claims 1 to 3, characterized in that: A swing plate (306) is movably mounted on the top of the lifting arm (305); a push rod (307) is movably mounted inside the lifting arm (305); a symmetrical limit arm (308) is mounted on the top of the push rod (307); the bottom of the push rod (307) extends out of the bottom of the lifting arm (305); a plurality of groups of convex plates (309) are mounted on the outer wall of the lifting arm (305); a plurality of groups of return springs (310) are connected to the convex plates (309); and the lifting arm (305) is connected to the bottom of the printing table (102) via the return springs (310).

10. A 3D printing device for construction according to claim 9, characterized in that: A conveyor belt (114) is also provided on the side of the printing platform (102).

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