CN107685379B - Array type spray head suitable for cement-based material 3D printing system - Google Patents
Array type spray head suitable for cement-based material 3D printing system Download PDFInfo
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- CN107685379B CN107685379B CN201710965570.8A CN201710965570A CN107685379B CN 107685379 B CN107685379 B CN 107685379B CN 201710965570 A CN201710965570 A CN 201710965570A CN 107685379 B CN107685379 B CN 107685379B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Abstract
The application relates to an array type spray head suitable for a cement-based material 3D printing system, which is characterized by comprising a spray head shell and an array nozzle mechanism; the spray head shell comprises a bottom plate, side walls, a partition plate, a cover plate, a V-shaped supporting plate and a turbine speed reducer shell, wherein the cross section of the bottom plate is of a W shape, two lowest points of the W-shaped bottom plate are provided with spray nozzles, a plurality of spray nozzles are arranged at equal intervals along the length direction of the bottom plate, two side surfaces of the upper part of the W-shaped bottom plate are fixedly connected with the side walls, and the bottom plate and the side walls are integrally of an inverted cone shape; the middle end surface of the upper part of the W-shaped bottom plate supports the lower part of a V-shaped supporting plate, the V-shaped supporting plate is arranged in parallel with the bottom plate up and down, and holes are formed in the V-shaped supporting plate corresponding to the positions of the nozzles; two partition boards are symmetrically arranged in a space surrounded by the bottom board and the side wall in the V-shaped supporting board, cover boards are fixed on the upper parts of the two partition boards, a sealing bin is formed among the partition boards, the V-shaped supporting board and the adjacent side wall, and the upper part of the sealing bin is connected with an external feeding mechanism.
Description
Technical Field
The application belongs to the technical field of 3D printing mechanical equipment, and particularly relates to an array type spray head suitable for a cement-based material 3D printing system.
Background
In recent years, along with the rapid development of important infrastructure and energy engineering construction in China, important engineering such as hydropower highslopes, highway and railway tunnels, underground cavern groups, nuclear power station foundations, nuclear waste storage, underground oil gas storage, mineral development, shale oil gas and geothermal development and the like all involve complex geological structures with fault and three-dimensional fracture network rock mass. The physical model test is one of main research means in the geotechnical engineering field, and is based on the preparation of a physical model capable of accurately representing a complex geological structure. Because of the existence of these discontinuous surfaces and bodies in rock mass, no mature method for making a three-dimensional model of a physical test of a complex geological structure exists internationally.
The 3D printing technology is a manufacturing technology with high technological content, which has been widely used in biomedical, aerospace, mold manufacturing, electronic information manufacturing, automobile manufacturing and other fields. The 3D printing technology is used for manufacturing a large-scale complex geological structure model, which is the basis for exploring engineering geological disaster mechanisms. The 3D printing technology has the greatest advantages of being capable of realizing the controllability and the replicability of the model and being suitable for repeated experimental study.
The 3D printing technology is applied to the manufacture of the physical model of the complex geological structure, and is a scientific technology with wide application prospect. The printing nozzle is used as a core component of the 3D printing technology, and successful research and development of the printing nozzle has important significance for solving engineering problems in the related fields. In engineering geological model production, the printing width needs to be converted in real time according to the size precision of a printing model and the complexity of the internal structure of the model, and the printing spray heads in the prior art are all of fixed sizes and cannot be adjusted in the printing process.
Chinese patent publication No. CN104191494B discloses a novel hot melt cement 3D printing head, which has the main function of realizing 3D printing of materials with high temperature, poor fluidity and the like. The printing head consists of a hot material conveying device and a cold material conveying device, is mainly designed for the novel hot-melt cement which is only a specific material of cement, and the designed 3D printing head is only suitable for printing of common buildings. However, in the engineering geological model production, if cement is used as a raw material, the raw material does not contain fine sand, aggregate and the like, so that the material strength cannot be ensured. Meanwhile, the engineering geological model is manufactured, the complexity of the internal structure of the model is more concerned, and a larger mass of printing nozzles are needed. In the prior art, a general cement-based material 3D printing nozzle for manufacturing a complex geological structure model is not available, and the novel hot-melt cement 3D printing heads shown in fig. 1 and 2 cannot manufacture the complex geological structure model.
Disclosure of Invention
In view of the above technical problems, the application provides an array type spray head suitable for a cement-based material 3D printing system. The spray head is specially designed for a cement-based material 3D printing system, is array-type, and can control the switch of each nozzle in real time in the printing process, so that the whole printing width is adjusted.
The technical scheme adopted for solving the technical problems is as follows: an array type spray head suitable for a cement-based material 3D printing system is provided, which is characterized by comprising a spray head shell and an array nozzle mechanism; the spray head shell comprises a bottom plate, side walls, a partition plate, a cover plate, a V-shaped supporting plate and a turbine speed reducer shell, wherein the cross section of the bottom plate is of a W shape, two lowest points of the W-shaped bottom plate are provided with spray nozzles, a plurality of spray nozzles are arranged at equal intervals along the length direction of the bottom plate, two side surfaces of the upper part of the W-shaped bottom plate are fixedly connected with the side walls, and the bottom plate and the side walls are integrally of an inverted cone shape; the middle end surface of the upper part of the W-shaped bottom plate supports the lower part of a V-shaped supporting plate, the V-shaped supporting plate is arranged in parallel with the bottom plate up and down, and holes are formed in the V-shaped supporting plate corresponding to the positions of the nozzles; two partition boards are symmetrically arranged in a space surrounded by a bottom board and side walls on the V-shaped supporting board, cover boards are fixed on the upper parts of the two partition boards, a sealing bin is formed among the partition boards, the V-shaped supporting board and the adjacent side walls, and the upper parts of the sealing bin are connected with an external feeding mechanism; a turbine speed reducer shell is fixed above the cover plate; the sealing bin is in a strip shape, and the length direction of the feeding mechanism is parallel to the sealing bin;
the array nozzle mechanism comprises a turbine speed reducer, a central gear and a plurality of nozzle units, the central gear is arranged at the center of the V-shaped supporting plate, the turbine speed reducer is contained in a turbine speed reducer shell, the output end of the turbine speed reducer passes through a cover plate and is vertically connected with the central gear, and the central gear can be driven to rotate through the turbine speed reducer; a plurality of nozzle units are distributed on two sides by taking the central gear as the center; each nozzle unit comprises a power component, a pressure increasing valve, a nozzle auger, an outer gear, an inner gear, an upper end face gear and a lower end face gear, wherein one end of the power component is connected with an external power source, the lower part of the power component passes through a cover plate to be connected with the pressure increasing valve, and the pressure increasing of the power component is realized through the pressure increasing valve; the lower part of the pressure increasing valve is fixedly connected with an upper end face gear; the upper part of the nozzle auger is fixedly connected with the lower surface of the upper end face gear, and the lower part of the nozzle auger sequentially penetrates through the lower end face gear, the outer side gear and the corresponding holes in the V-shaped supporting plate and penetrates into corresponding nozzles on the bottom plate; the lower face gear can slide up and down on the nozzle auger, so that the face teeth of the lower face gear and the face teeth of the upper face gear can be meshed with each other; an inner gear meshed with the outer gear is arranged on the inner side of the outer gear; the inner gears and the outer gears of the adjacent two nozzle units are also meshed with each other, one end of the central gear is meshed with the inner gears of one or a plurality of nozzle units in one row, and the other end is meshed with the inner gears of one or a plurality of nozzle units in the other row.
Compared with the prior art, the application has the beneficial effects that:
the array type spray head is specially designed for 3D printing of cement-based materials, consists of a plurality of rows of nozzle units which can be independently controlled, and can flexibly and independently control the switch of each nozzle unit according to the geometric structure of a model to be printed in the printing process, so that the large size and high precision are simultaneously considered, the printing efficiency of the model (especially complex model structure) in manufacturing is improved due to the simultaneous operation of a plurality of nozzle units, and the blank of the cement-based material array type 3D printing spray head is filled.
Drawings
FIG. 1 is a schematic diagram of a hot material conveying device of a conventional cement material 3D printing nozzle;
fig. 2 is a schematic structural diagram of a cold material conveying device of a 3D printing nozzle for cement materials in the prior art;
FIG. 3 is a schematic diagram of an array type spray head suitable for a 3D printing system for cement-based materials;
FIG. 4 is a schematic view of the mounting structure of two nozzle units and a turbine speed reducer of the present application;
FIG. 5 is a schematic view of a partial cross-sectional front view of an array nozzle mechanism 2 of one embodiment of an array head suitable for use in a 3D printing system for cementitious material in accordance with the present application;
FIG. 6 is a schematic view of the mounting arrangement of the sun gear, the inside gear and the outside gear on the V-shaped support plate of the present application;
in the drawings, 1. Spray head housing, 2. Array nozzle mechanism, 3. Feed mechanism, 11. Floor, 12. Side wall, 13. Baffle, 14. V-shaped support plate, 15. Seal stock house, 16. Turbine speed reducer housing, 17. Cover plate, 21. Nozzle packing auger, 22. Outside gear, 29. Inside gear, 23. Sun gear, 24. Upper face gear, 25. Lower face gear, 26. Pressure increasing valve, 27. Cylinder, 28. Turbine speed reducer, 111. Spout, 112. Side wall mounting hole.
Detailed Description
The application is further described below with reference to examples and drawings, which are not intended to limit the scope of the claims.
The application is applicable to an array type spray head (simply called as an array type spray head, see figure 3) of a cement-based material 3D printing system, and comprises a spray head shell 1 and an array nozzle mechanism 2; the spray head shell 1 comprises a bottom plate 11, side walls 12, a partition plate 13, a cover plate 17, a V-shaped supporting plate 14 and a turbine speed reducer shell 16, wherein the cross section of the bottom plate 11 is of a W shape, two lowest points of the W-shaped bottom plate are provided with spray nozzles 111, a plurality of spray nozzles are arranged at equal intervals along the length direction of the bottom plate, side wall mounting holes 112 are formed in two side surfaces of the upper part of the W-shaped bottom plate, the bottom plate 11 and the side walls 12 are fixedly connected through bolts penetrating through the side wall mounting holes, and the bottom plate and the side walls 12 are integrally in an inverted cone shape; the middle end surface of the upper part of the W-shaped bottom plate supports the lower part of a V-shaped supporting plate 14, the V-shaped supporting plate 14 is arranged in parallel with the bottom plate up and down, and holes are formed in the V-shaped supporting plate corresponding to the positions of the nozzles; two partition plates 13 are symmetrically arranged in a space surrounded by a bottom plate and side walls on the V-shaped supporting plate, cover plates 17 are fixed on the upper parts of the two partition plates, a sealing bin 15 is formed among the partition plates 13, the V-shaped supporting plate and the adjacent side walls 12, and the upper parts of the sealing bin 15 are connected with an external feeding mechanism 3; a turbine speed reducer shell 16 is fixed above the cover plate 17, and two ends of the turbine speed reducer shell 16 are fixed with the lower end of the external feeding mechanism; the sealing bin 15 is in a strip shape, the length direction of the feeding mechanism is parallel to the sealing bin and forms an included angle of 45 degrees, so that concrete materials can flow under the weight of the concrete materials, and the conveying of the materials is facilitated;
the array nozzle mechanism 2 (see fig. 4 and 5) comprises a turbine speed reducer 28, a central gear 23 and a plurality of nozzle units, wherein the central gear is arranged at the center of the V-shaped supporting plate 14, the turbine speed reducer 28 is contained in a turbine speed reducer shell, the output end of the turbine speed reducer 28 passes through the cover plate 17 and is vertically connected with the central gear, and the central gear can be driven to rotate through the turbine speed reducer; a plurality of nozzle units are distributed on two sides by taking the central gear as the center; each nozzle unit comprises a cylinder 27 (a power component), a pressure increasing valve 26, a nozzle auger 21, an outer side gear 22, an inner side gear 29, an upper end face gear 24 and a lower end face gear 25, one end of the cylinder 27 is connected with an external air pressure source, the lower part of the cylinder 27 penetrates through a cover plate 17 to be connected with the pressure increasing valve 26, and the pressure increasing of the cylinder is realized through the pressure increasing valve; the lower part of the pressure increasing valve 26 is fixedly connected with the upper face gear 24; the upper part of the nozzle auger 21 is fixedly connected with the lower surface of the upper face gear 24, and the lower part of the nozzle auger 21 sequentially passes through the lower face gear 25, the outer side gear 22 and corresponding holes on the V-shaped supporting plate 14 and penetrates into corresponding nozzles 111 on the bottom plate 11; the lower face gear 25 can slide up and down on the nozzle auger 21, so that the face teeth of the lower face gear 25 and the face teeth of the upper face gear 24 can be meshed with each other; an inner gear 29 meshed with the outer gear 22 is arranged on the inner side of the outer gear 22; the inner and outer gears of adjacent two nozzle units are also meshed with each other, and one end of the sun gear 23 is meshed with the inner gear of one or more nozzle units in one row, and the other end is meshed with the inner gear of one or more nozzle units in the other row.
The application is further characterized in that the nozzle augers are divided into two rows and are arranged in parallel, the number of the nozzles arranged on the bottom plate is the same as that of the nozzle augers, and the positions of the nozzles correspond to the positions of the nozzle augers. In the application, one end of the central gear can be connected with one inner side gear or two inner side gears (see fig. 6), so long as the central gear is guaranteed to rotate, the inner side gears can drive the inner side gears to rotate, and the inner side gears can drive all the outer side gears to rotate in a mode of mutual meshing of the outer side gears and the inner side gears, so that the outer side gears of the whole row can rotate, and each nozzle auger 21 can be controlled to perform corresponding actions.
The application is further characterized in that the inner gear is also provided with a nozzle auger, and the bottom plate right below the inner gear is correspondingly provided with a nozzle. The same mechanism is arranged on the inner side gear and the outer side gear, so that the nozzle auger on the inner side gear can perform corresponding actions, namely the upper part of the nozzle auger is also connected with an upper end face gear, the upper part of the upper end face gear is connected with a power component through a pressure boosting valve, and the lower part of the nozzle auger sequentially penetrates through the lower end face gear 25, the inner side gear and the V-shaped supporting plate and penetrates into a corresponding nozzle in the bottom plate. The arrangement can help to reduce the size of the whole array type spray head, and the layout is more reasonable and attractive.
The application is further characterized in that each spout 111 has dimensions of 12mm x 12mm. The size of each nozzle in the application can be 15mm multiplied by 15mm,5mm multiplied by 5mm. The size of the nozzle controls the printing accuracy, and the larger the nozzle size, the worse the printing accuracy, the smaller the nozzle, and the longer the printing time, preferably the size is 12mm×12mm. The nozzle can independently control the printing switch, the printing speed is controllable, and the practical value is high.
The working process of the array spray head of the application is as follows: the concrete material (cement-based material) enters the sealing bin 15 through the feeding mechanism 3, and the upper face gear moves downwards under the drive of the common power of the pressure increasing valve and the air cylinder and is connected with the lower face gear in a meshed manner, so that the nozzle auger is driven to rotate; likewise, the upper face gear can be separated from the lower face gear when the cylinder stops working, and the rotation of the spray head auger is stopped. The rotation of the nozzle auger causes the concrete material to be extruded for printing.
The size of the nozzle is related to the cement-based material, and the size of the printing nozzle is set to be fixed, so that the cement-based material needs to be regulated in gradation, water consumption and the like of raw materials during preparation so as to ensure that the concrete material can be smoothly extruded from each nozzle. The array type printing spray head is applicable to 3D printing of general cement-based materials for manufacturing complex geologic structure models, and is made of cement, lightweight aggregate concrete and the like.
The cylinder is a power component and can drive the nozzle auger to stir, and the cylinder can be replaced by a motor or a hydraulic power element.
Example 1
The embodiment is suitable for an array type spray head of a cement-based material 3D printing system, and comprises a spray head shell 1 and an array nozzle mechanism 2; the spray head shell 1 comprises a bottom plate 11, side walls 12, a partition plate 13, a V-shaped supporting plate 14, a turbine speed reducer shell 16 and a cover plate 17, wherein the bottom plate, the side walls, the partition plate, the turbine speed reducer shell and the feeding mechanism are fixedly connected in a welding manner, and the spray head shell is used for supporting the array nozzle mechanism 2; the array nozzle mechanism 2 comprises a nozzle auger 21, an outer side gear 22, a central gear 23, an upper end face gear 24, a lower end face gear 25, a booster valve 26, an air cylinder 27, a turbine speed reducer 28 and an inner side gear 29, wherein the array nozzle mechanism 2 is a main body structure of a 3D printing array nozzle;
the cross section of the bottom plate 11 is W-shaped, the two lowest points of the W-shaped bottom plate are provided with nozzles 111, 50 nozzles 111 are arranged on the bottom plate 11 in total, and the nozzles 111 are arranged in two parallel rows to form a nozzle array by matching with the nozzle auger 21; the bottom plate 11 is fixedly connected with the side wall 12 through a side wall mounting hole 112 to form a printing material storage and nozzle unit movement space; the upper part of the side wall 12 is provided with a cover plate 17, a feeding mechanism 3 is symmetrically arranged between the side wall and the cover plate 17, and the feeding mechanism 3 is used for providing cement-based materials required by printing; the V-shaped supporting plate is fixedly connected with the bottom plate 11 through long bolts 18, two partition plates 13 are symmetrically welded and fixed between the V-shaped supporting plate and the cover plate 17 so as to separate the nozzle auger 21 from other control components, a sealing bin 15 is formed among the partition plates 13, the V-shaped supporting plate and the adjacent side walls 12, and the upper part of the sealing bin 15 is connected with the external feeding mechanism 3; the turbine reducer housing 16 is used for wrapping the turbine reducer 28, and the turbine reducer housing 16 is connected with the partition plate 13 in a welding manner;
the array nozzle mechanism 2 comprises a turbine speed reducer 28, a central gear 23 and a plurality of nozzle units, wherein the central gear is arranged at the center of the V-shaped supporting plate 14, the turbine speed reducer 28 is contained in a turbine speed reducer shell, the output end of the turbine speed reducer 28 passes through the cover plate 17 to be vertically connected with the central gear, and the central gear can be driven to rotate through the turbine speed reducer; a plurality of nozzle units are distributed in two rows by taking a central gear as a center; each nozzle unit comprises a cylinder 27, a pressure increasing valve 26, a nozzle auger 21, an outer side gear 22, an inner side gear 29, an upper end face gear 24 and a lower end face gear 25, one end of the cylinder 27 is connected with an external air pressure source, the lower part of the cylinder 27 penetrates through a cover plate 17 to be connected with the pressure increasing valve 26 through bolts, and the pressure increasing of the cylinder is realized through the pressure increasing valve; the lower part of the pressure increasing valve 26 is fixedly connected with the upper face gear 24; the upper part of the nozzle auger 21 is fixedly connected with the lower surface of the upper face gear 24, and the lower part of the nozzle auger 21 sequentially passes through the lower face gear 25, the outer side gear 22 and corresponding holes on the V-shaped supporting plate 14 and penetrates into corresponding nozzles 111 on the bottom plate 11; the lower face gear 25 can slide up and down on the nozzle auger 21, so that the face teeth of the lower face gear 25 and the face teeth of the upper face gear 24 can be meshed with each other; an inner gear 29 meshed with the outer gear 22 is arranged on the inner side of the outer gear 22; the outer gear is vertically corresponding to the nozzle auger and the lower end face gear in a welding mode and is fixedly connected with the nozzle auger and the lower end face gear; the upper end face gear is vertically corresponding to the pressure increasing valve and the cylinder and is in spiral connection; the outside gear and the inside gear are meshed with the central gear in the same horizontal plane. The central gear vertically corresponds to the turbine speed reducer and is connected with the turbine speed reducer in a welding way.
In this embodiment, the size of the array nozzle is: the size of each nozzle is 12mm multiplied by 12mm, 50 single nozzles are provided, the maximum width of the array nozzle capable of printing is 25 multiplied by 12=300 mm, and the printing range is 12-300 mm.
The nozzle augers 21 are arranged in parallel in two rows and in an array, each row is provided with 25 nozzle augers 21, and 50 nozzles with the same size are arranged on the bottom plate 11. The cement-based material is extruded from the corresponding nozzle from the array-type spray head under rotary extrusion of the nozzle auger 21.
Example 2
The connection relationship of each part of the array type spray head in the embodiment is the same as that in the embodiment 1, and the difference is that a nozzle auger is also arranged on each inner side gear in the embodiment, and a nozzle is correspondingly arranged on a bottom plate right below the inner side gears. And each inner side gear is provided with a cylinder, a booster valve, an upper end face gear and a lower end face gear through a nozzle auger, and the specific connection relation is the connection relation between the parts on the outer side gears.
In this embodiment, 50 nozzles are arranged in the manner shown in fig. 6, that is, the nozzles are arranged on two sides with the central gear as the center, the number of outer gears on each side is 13, the number of inner gears is 12, one side of the central gear is meshed with two inner gears at the same time, and the other side is meshed with one inner gear. The maximum printable width of the array head is 13×12=156 mm. Each independent nozzle corresponds to one cylinder, and each nozzle can be independently controlled, so that the printing range is 12-156 mm, and the printing precision is 12mm. Thereby realizing the adjustment of the printing width of the printing head.
It should be noted that, in this embodiment, the nozzle unit and the sealing bin are controlled by corresponding electronic control systems. The electronic control system is a common electronic control system in the field, and will not be described in detail here.
After explaining the structure and working principle of the cement-based material array type 3D printing nozzle in this embodiment in detail, the following describes the working procedure:
(1) Feeding: and injecting materials into the feeding mechanism from the outside, and conveying the slurry to the sealing bin after stirring.
(2) Printing: and controlling the cylinder at the position to be printed to move, driving the corresponding upper end face gear and lower end face gear to be meshed, and simultaneously controlling the nozzle auger to rotate by the turbine speed reducer to extrude the slurry to realize printing.
(3) And (3) printing mode control: by controlling the movement of the cylinders at different positions, the local printing of the geologic bodies with different shapes can be realized.
Experiments prove that the array type cement-based material 3D printing spray head can smoothly realize 3D printing of the cement-based material, and has high precision, high speed and strong practicability.
The present embodiment has been described in detail with reference to the accompanying drawings. From the above description, it should be clear to a person skilled in the art that the cement-based material array type 3D printing head of the present application.
It should be noted that, in the drawings or the text of the specification, implementations not shown or described are all forms known to those of ordinary skill in the art, and not described in detail. Furthermore, the above definitions of the elements and methods are not limited to the specific structures, shapes or modes mentioned in the embodiments, and may be modified or replaced simply by one skilled in the art, for example:
(1) The control of the printing nozzle cylinder can also adopt control modes such as a motor and the like;
(2) The cement-based material can also be other materials such as gypsum;
(3) Examples of parameters that include particular values may be provided herein, but these parameters need not be exactly equal to the corresponding values, but may approximate the corresponding values within acceptable error margins or design constraints;
(5) The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are merely directions with reference to the drawings, and are not intended to limit the scope of the present application.
While the foregoing is directed to embodiments of the present application, other and further details of the application may be had by the present application, it should be understood that the foregoing description is merely illustrative of the present application and that no limitations are intended to the scope of the application, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the application.
The application is applicable to the prior art where it is not described.
Claims (6)
1. An array type spray head suitable for a cement-based material 3D printing system is characterized by comprising a spray head shell and an array nozzle mechanism; the spray head shell comprises a bottom plate, side walls, a partition plate, a cover plate, a V-shaped supporting plate and a turbine speed reducer shell, wherein the cross section of the bottom plate is of a W shape, two lowest points of the W-shaped bottom plate are provided with spray nozzles, a plurality of spray nozzles are arranged at equal intervals along the length direction of the bottom plate, two side surfaces of the upper part of the W-shaped bottom plate are fixedly connected with the side walls, and the bottom plate and the side walls are integrally of an inverted cone shape; the middle end surface of the upper part of the W-shaped bottom plate supports the lower part of a V-shaped supporting plate, the V-shaped supporting plate is arranged in parallel with the bottom plate up and down, and holes are formed in the V-shaped supporting plate corresponding to the positions of the nozzles; two partition boards are symmetrically arranged in a space surrounded by a bottom board and side walls on the V-shaped supporting board, cover boards are fixed on the upper parts of the two partition boards, a sealing bin is formed among the partition boards, the V-shaped supporting board and the adjacent side walls, and the upper parts of the sealing bin are connected with an external feeding mechanism; a turbine speed reducer shell is fixed above the cover plate; the sealing bin is in a strip shape, and the length direction of the feeding mechanism is parallel to the sealing bin;
the array nozzle mechanism comprises a turbine speed reducer, a central gear and a plurality of nozzle units, the central gear is arranged at the center of the V-shaped supporting plate, the turbine speed reducer is contained in a turbine speed reducer shell, the output end of the turbine speed reducer passes through a cover plate and is vertically connected with the central gear, and the central gear can be driven to rotate through the turbine speed reducer; a plurality of nozzle units are distributed on two sides by taking the central gear as the center; each nozzle unit comprises a power component, a pressure increasing valve, a nozzle auger, an outer gear, an inner gear, an upper end face gear and a lower end face gear, wherein one end of the power component is connected with an external power source, the lower part of the power component passes through a cover plate to be connected with the pressure increasing valve, and the pressure increasing of the power component is realized through the pressure increasing valve; the lower part of the pressure increasing valve is fixedly connected with an upper end face gear; the upper part of the nozzle auger is fixedly connected with the lower surface of the upper end face gear, and the lower part of the nozzle auger sequentially penetrates through the lower end face gear, the outer side gear and the corresponding holes in the V-shaped supporting plate and penetrates into corresponding nozzles on the bottom plate; the lower face gear can slide up and down on the nozzle auger, so that the face teeth of the lower face gear and the face teeth of the upper face gear can be meshed with each other; an inner gear meshed with the outer gear is arranged on the inner side of the outer gear; the inner gears and the outer gears of the adjacent two nozzle units are also meshed with each other, one end of the central gear is meshed with the inner gears of one or a plurality of nozzle units in one row, and the other end is meshed with the inner gears of one or a plurality of nozzle units in the other row.
2. The array head for a 3D printing system of cementitious material as defined in claim 1, wherein the seal silo is at an angle of 45 ° to the horizontal.
3. The array type spray head suitable for the cement-based material 3D printing system according to claim 1, wherein a nozzle auger is also arranged on the inner gear, and a nozzle is correspondingly arranged on a bottom plate right below the inner gear.
4. The array type spray head suitable for the cement-based material 3D printing system according to claim 1, wherein the spray heads are divided into two rows and are arranged in parallel, and the number of the spray nozzles arranged on the bottom plate is the same as that of the spray heads, and the positions of the spray heads correspond to that of the spray heads.
5. The array nozzle head adapted for use in a cementitious material 3D printing system according to claim 1, wherein each nozzle orifice has dimensions of 12mm x 12mm.
6. The array head adapted for use in a cementitious material 3D printing system according to claim 1, wherein the power means is a cylinder or a motor.
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| CN201710965570.8A CN107685379B (en) | 2017-10-17 | 2017-10-17 | Array type spray head suitable for cement-based material 3D printing system |
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| CN201710965570.8A CN107685379B (en) | 2017-10-17 | 2017-10-17 | Array type spray head suitable for cement-based material 3D printing system |
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| CN109849339A (en) * | 2019-04-02 | 2019-06-07 | 北京建筑大学 | A kind of jet array device for 3D printing building |
| CN111216215A (en) * | 2020-01-16 | 2020-06-02 | 华创智造(天津)科技有限公司 | Concrete 3D printing robot |
| CN113021562B (en) * | 2021-04-16 | 2022-05-27 | 北京工业大学 | Piezoelectric aggregate automation buries device underground based on cement base 3D prints |
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| CN107685379A (en) | 2018-02-13 |
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