A 3D printing molding device based on double-layer wind field

Abstract

The present application provides a 3D printing and forming device based on a double-layer wind field, which relates to the field of 3D printing. The 3D printing and forming device based on a double-layer wind field includes: a 3D printing device, a fan assembly, an external wind field smoking assembly, a rotary dust filter assembly, and a wind pressure internal wind field air supply assembly. The external wind field takes away the smoke and does not directly enter the printing cabin of the 3D printing device. Then the wind filtered by the external wind field containing smoke and external impurities is appropriately added into the cabin to make up for the wind lost in the internal wind field due to smoke emission, forming an internal wind field circulation, so that external impurities and smoke pass through the same filtering system. The external wind field and the internal wind field form a double-layer wind field, which is conducive to smoke circulation and purification. During this period, the impurities in the smoke are decelerated and settled twice, and the impurity content filtered by the outer filter is reduced, which prolongs the use and cleaning time of the outer filter, and the impurities on the internal filter will be detached with the wind, reducing the retention of impurities on the internal filter.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a 3D printing molding device based on a double-layer wind field. Background Art

[0002] For laser molten metal 3D printing technology, a lot of smoke and dust will be generated during the printing process. Without a good wind field and airflow design, it is difficult to ensure the smooth progress of the processing process. A good airflow design should ensure that the smoke and dust can be effectively removed and prevented from spreading in the molding chamber. The quality of the wind field directly affects the quality of the printed parts.

[0003] In the related art, when designing the wind field of a 3D printing molding device based on a double-layer wind field, it is necessary to introduce the outside wind or the wind in the gas cylinder into the printing cabin of the 3D printing equipment, and then ventilate through the ventilation system to take away the smoke and dust. Directly using the gas cylinder will increase the cost of use, and the introduction of outside wind is easy to bring in impurities, which need to be filtered first. Therefore, it is necessary to design the air intake filter first, and the wind introduced from the outside needs to be designed with a filter structure to filter the smoke brought into the cabin after ventilation, and the air outlet filter needs to be designed. First, how to design the external wind field so that the external wind field takes away the smoke and does not directly enter the printing cabin of the 3D printing equipment, and then the wind filtered by the external wind field containing smoke and external impurities is appropriately added into the cabin to make up for the wind lost in the internal wind field due to smoke emission, forming an internal wind field cycle, so that external impurities and smoke pass through the same filtration system, and impurity concentration becomes a technical problem that needs to be solved. Secondly, how to centrally process the concentrated impurities also becomes a technical problem that needs to be solved. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a 3D printing molding device based on a double-layer wind field, wherein the outer wind field of the 3D printing molding device based on the double-layer wind field takes away the smoke and does not directly enter the printing cabin of the 3D printing device, and then the wind filtered by the outer wind field containing smoke and external impurities is appropriately added into the cabin to make up for the wind lost in the inner wind field due to smoke emission, forming an inner wind field circulation, so that external impurities and smoke pass through the same filtering system, and the outer wind field and the inner wind field form a double-layer wind field, which is beneficial to the circulation and purification of smoke. During this period, the impurities in the smoke are decelerated and settled twice, and the impurity content filtered by the outer filter is reduced, which prolongs the use and cleaning time of the outer filter, and the impurities on the inner filter will be detached with the wind, reducing the retention of impurities on the inner filter.

[0005] According to the embodiment of the present application, the 3D printing molding device based on the double-layer wind field includes: a 3D printing device, a fan assembly, an external wind field suction assembly, a rotary dust filter assembly and a wind pressure internal wind field air supply assembly.

[0006] The fan assembly is arranged on the outside of the top of the 3D printing device, the external wind field smoking assembly is arranged on the inside of the top of the 3D printing device, the air outlet of the fan assembly is connected to the external wind field smoking assembly, and the two ends of the external wind field smoking assembly extend out of the 3D printing device respectively. The rotary dust filter assembly is set as two, and the two rotary dust filter assemblies are respectively connected to the two ends of the external wind field smoking assembly extending out of the 3D printing device. The wind pressure internal wind field air supply assembly is composed of a storage mechanism, a filtering structure and a wind pressure exhaust type internal wind field air supply structure from bottom to top. The storage mechanism is connected to the outer side of the lower end of the rotary dust filter assembly. Wind pressure is formed at the exhaust part of the wind pressure exhaust type internal wind field air supply structure. Under the action of wind pressure, the wind pressure exhaust type internal wind field air supply knot supplies air to the 3D printing device.

[0007] According to some embodiments of the present application, the 3D printing device includes a 3D printing device body, an upper cover and an internal wind field air bleed interface, the upper cover is arranged on the open opening at the top of the 3D printing device body, the external wind field smoking assembly is arranged in the upper cover, the air inlet of the external wind field smoking assembly extends out of the upper end of the upper cover, and both ends of the external wind field smoking assembly extend out of the two ends of the upper cover, one end of the internal wind field air bleed interface is connected to the lower end of the inner cabin of the 3D printing device body, and the other end of the internal wind field air bleed interface is connected to the wind pressure exhaust type internal wind field air supply structure.

[0008] According to some embodiments of the present application, the fan assembly includes a mounting base, a drive motor and a fan, the drive motor is fixedly connected to the rear end of the mounting base, the fan is fixedly connected to the front end of the mounting base, the rear end of the upper cover has a fixed base, the bottom end of the mounting base is fixedly connected to the fixed base, the drive motor is transmission-connected to the fan, and the air outlet of the fan is connected to the air inlet of the external wind field smoking assembly.

[0009] According to some embodiments of the present application, the external wind field smoking assembly includes an air suction piece, an air inlet pipe and a first connecting plate, the air suction piece is arranged in plurality, the air suction piece includes a coarse-diameter air collecting pipe, a fine-diameter circulation pipe, a coarse-diameter exhaust pipe and an air suction port, the coarse-diameter air collecting pipes on the plurality of air suction pieces are interconnected through the air inlet pipe, both ends of the coarse-diameter air collecting pipe are connected with the fine-diameter circulation pipe, the air suction port is fixedly connected to the lower side of the fine-diameter circulation pipe, the outer end of the fine-diameter circulation pipe is connected with the coarse-diameter exhaust pipe, the coarse-diameter exhaust pipes at the same end of the plurality of air suction pieces are interconnected through the first connecting plate, the first connecting plate is fixedly connected to the rotating dust filter assembly, and the coarse-diameter exhaust pipe is connected to the rotating dust filter assembly.

[0010] According to some embodiments of the present application, the rotary dust filter assembly includes an air induced draft member, a rotary drum, a connecting pipe, a driving shaft member, a rotary filter mesh member and an air guide duct. The inner side of the upper end of the air induced draft member is connected to the external wind field smoking assembly, and the lower side of the air induced draft member and the upper side of the rotary drum are connected through the connecting pipe. The connecting pipe has concave arcs on both sides. One end of the air guide duct is fixedly connected to the outside of the rotary drum, and the other end of the air guide duct is fixedly connected between the storage mechanism and the filtering structure of the wind pressure internal wind field air supply assembly. The rear end of the driving shaft member is arranged at the rear end of the driving shaft member, and the front end of the driving shaft member rotates and passes through the interior of the rotary drum. The rotary filter mesh member is fixedly sleeved on the driving shaft member, and both sides and the outer edge of the rotary filter mesh member slide on the inner side wall and the arc-shaped inner wall of the rotary drum.

[0011] According to some embodiments of the present application, the air induced component includes an air induced duct, a collecting box and a second connecting plate. A plurality of the air induced ducts are fixedly connected to the inner side of the collecting box. The plurality of air induced ducts are connected through the second connecting plate at one end away from the collecting box. The second connecting plate is fixedly connected to the end of the external wind field smoking assembly extending out of the 3D printing device, and the upper end of the connecting duct is connected to the lower side of the collecting box.

[0012] According to some embodiments of the present application, the driving rotating shaft member includes a rotating shaft and a rotary motor, the rear end of the rotating drum is fixedly connected to a mounting frame, the rotary motor is fixedly connected to the mounting frame, the rotating shaft is located in the rotating drum, both ends of the rotating shaft respectively rotate and pass through the front and rear ends of the rotating drum, the rear end of the rotating shaft extends out of the rear end of the rotating drum, the rotary motor is transmission-connected to the rear end of the rotating shaft, and the rotary filter mesh member is fixedly sleeved on the rotating shaft.

[0013] According to some embodiments of the present application, the rotary filter screen includes a connecting cylinder, a connecting frame and a rotary filter screen. The connecting frames are arranged at equal intervals on the outside of the connecting cylinder. The two sides and the outer edges of the connecting frame slide on the inner side walls and the curved inner wall at the front and rear ends of the rotary cylinder respectively. The rotary filter screen is arranged in the connecting frame.

[0014] According to some embodiments of the present application, the storage mechanism includes a guide droplet pipe, a droplet storage pipe and a sealing member, the filtering structure includes an air outlet pipe, an impact dust shield and an air outlet filter, the wind pressure exhaust type internal wind field air supply structure includes a plug-in exhaust adjustment member and an air supply interface, the bottom end of the guide droplet pipe is tilted outwardly and arranged at the bottom end of the air outlet pipe, the droplet storage pipe is fixedly connected to the bottom end of the guide droplet pipe, the sealing member is connected to the bottom end of the droplet storage pipe, the sealing member seals the bottom end of the droplet storage pipe, the outer side of the rotating dust filter assembly is fixedly connected to the lower end of the air outlet pipe, the impact dust shield is provided in plurality, a plurality of the impact dust shields are staggeredly arranged inside the air outlet pipe, and a plurality of the impact dust shields are staggeredly arranged inside the air outlet pipe, and The outer ends of the plates are all inclined downward, and multiple air outlets are formed between the outer ends of the multiple impact dust shields and the inner wall of the air outlet duct. The multiple air outlets are staggered, and a raised baffle is provided on the lower side of the impact dust shield. The upper end of the air outlet filter is connected to the upper end of the air outlet duct, one end of the plug-in exhaust adjustment component is provided on the outside of the upper end of the air outlet duct, and the other end of the plug-in exhaust adjustment component is slidably plugged into the interior of the air outlet duct, and the plug-in exhaust adjustment component is located at the upper end of the air outlet filter, one end of the air supply interface is fixedly connected to the interior of the air outlet duct, and the air supply interface is located between the air outlet filter and the plug-in exhaust adjustment component, and the air supply interface is connected to the lower end of the inner cabin of the 3D printing equipment.

[0015] According to some embodiments of the present application, the air outlet duct assembly includes an air outlet duct and a limit frame, a slide groove is opened on the outer side of the upper end of the air outlet duct, the limit frame is fixedly connected to the inside of the upper end of the air outlet duct, the air outlet filter is arranged on the upper side of the limit frame, and the plug-in exhaust adjustment component is slidably plugged into the slide groove.

[0016] According to some embodiments of the present application, the plug-in exhaust adjustment component includes an outer end folding plug-in plate, an adjustment rod, a first compression spring and a first nut. The adjustment rod is fixedly connected to the outer side of the upper end of the air outlet pipe, one end of the outer end folding plug-in plate is slidably connected to the adjustment rod, the first nut is connected to the adjustment rod by a thread, the first nut is pressed against the outer side of one end of the outer end folding plug-in plate, the first compression spring is sleeved on the adjustment rod, two ends of the first compression spring are respectively pressed against the inner side of one end of the outer end folding plug-in plate and the outer side of the air outlet pipe, and the other end of the outer end folding plug-in plate is slidably plugged into the inside of the air outlet pipe.

[0017] According to some embodiments of the present application, an elastic pressing piece is arranged between the outer end folding plug-in plate and the air outlet filter, and the elastic pressing piece includes a pressing frame, a positioning seat and a second compression spring. The pressing frames are provided in two, and the two pressing frames are slidably plugged into the interior of the upper end of the air outlet pipe, and the positioning seats are respectively arranged on the inner walls at the front and rear ends of the pressing frames, and the upper and lower ends of the second compression spring are respectively inserted into the positioning seats relative to the two pressing frames, and the lower side of the outer end folding plug-in plate is pressed against the upper pressing frame, and the lower pressing frame presses the air outlet filter against the limiting frame.

[0018] According to some embodiments of the present application, the quality storage tube component includes a quality storage tube and a hanging plate, a first U-shaped clip-on groove is provided on the outer side of the hanging plate, the hanging plate is fixedly connected to the outer walls on the front and rear sides of the upper end of the quality storage tube, and the front and rear ends of the sealing component are respectively hung on the first U-shaped clip-on groove on the hanging plate.

[0019] According to some embodiments of the present application, the sealing member includes a sealing plate, a blocking frame, a rotating sleeve, a T-shaped hanging rod, a second nut and a sealing ring, the blocking frame is fixedly connected to the upper side of the sealing plate, the blocking frame is inserted into the interior of the lower end of the storage tube, the sealing ring is fixedly connected to the upper side of the sealing plate, the sealing ring is located at the outer periphery of the blocking frame, the lower end of the storage tube is pressed against the sealing ring, the front and rear ends of the sealing plate are respectively provided with second U-shaped clamping grooves, four rotating sleeves are provided, the four rotating sleeves are respectively fixedly connected to the lower side of the sealing plate, the four rotating sleeves are respectively distributed on both sides of the two second U-shaped clamping grooves, the two sides of the lower end of the T-shaped hanging rod are respectively rotatably connected to the two rotating sleeves on both sides of the second U-shaped clamping groove, the T-shaped hanging rod can be snapped into the second U-shaped clamping groove and the first U-shaped clamping groove after being flipped up, the second nut is threadedly sleeved on the upper end of the T-shaped hanging rod, and the second nut is pressed against the upper side of the hanging plate.

[0020] The beneficial effects of the present application are as follows: the fan assembly is started, and the fan assembly supplies air to the external wind field smoking assembly. The external wind field smoking assembly forms a Bernoulli effect by changing the pipe diameter. The external wind field smoking assembly extracts the smoke in the 3D printing device, and then takes the smoke away through the external wind field. The smoke taken away flows into the rotary dust filter assembly along with the airflow, and is first filtered and decelerated by the rotary dust filter assembly, so that most of the impurities fall on the rotary dust filter assembly, and then the impurities are sent to the connection between the rotary dust filter assembly and the storage mechanism through the rotation of the rotary dust filter assembly. With the blowing of the wind, the fallen impurities are sent to the storage mechanism, so as to reduce the content of impurities in the wind in advance. Subsequently, the wind with impurities is decelerated and filtered by the filtering structure, and then discharged through the wind pressure exhaust type internal wind field air supply structure. The size of the air outlet of the wind pressure exhaust type internal wind field air supply structure is controlled to form wind pressure at the discharge of the wind pressure exhaust type internal wind field air supply structure. Part of the filtered gas is replenished into the 3D printing device under the action of wind pressure to make up for the gas taken away by the extracted smoke, thereby forming an internal wind field cycle. The external wind field takes away the flue gas and does not directly enter the printing cabin of the 3D printing equipment. Then the wind filtered by the external wind field containing flue gas and external impurities is appropriately supplemented into the cabin to make up for the wind lost in the internal wind field due to flue gas emission, forming an internal wind field circulation, so that external impurities and flue gas pass through the same filtration system. The external wind field and the internal wind field form a double-layer wind field, which is beneficial to the circulation and purification of flue gas. During this period, the impurities in the flue gas are decelerated and settled twice, and the impurity content filtered by the outer filter is reduced, which prolongs the use and cleaning time of the outer filter. In addition, the impurities on the internal filter will be detached with the wind, reducing the retention of impurities on the internal filter.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of a 3D printing molding device based on a double-layer wind field according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the three-dimensional structure of a 3D printing device according to an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of a three-dimensional structure of a fan assembly and an external wind field smoking assembly connected according to an embodiment of the present application;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotary dust filter assembly and the wind pressure internal wind field air supply assembly according to an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of a three-dimensional structure in which an air inducing member and a rotary drum are connected via a connecting pipe according to an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a three-dimensional structure of a driving shaft member and a rotary filter mesh member connected according to an embodiment of the present application;

[0029] Figure 7 It is an exploded view from bottom to top of the three-dimensional structure of the air outlet pipe, the air outlet filter and the elastic pressing member according to the embodiment of the present application;

[0030] Figure 8 is a schematic diagram of the three-dimensional structure of a plug-in exhaust adjustment member according to an embodiment of the present application;

[0031] Fig. 9 According to the embodiment of the present application Figure 7 A schematic diagram of the enlarged three-dimensional structure in the middle;

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the blocking member according to an embodiment of the present application.

[0033] Icons: 100-3D printing equipment; 110-3D printing equipment body; 120-upper cover; 130-inner wind field air intake interface; 140-fixed base; 200-fan assembly; 210-installation base; 220-drive motor; 230-fan; 300-outer wind field smoke extraction assembly; 310-inhalation component; 311-large diameter air collecting pipe; 312-small diameter circulation pipe; 313-large diameter exhaust pipe; 314- Inlet; 320-inlet pipe; 330-first connecting plate; 400-rotating dust filter assembly; 410-induction member; 411-induction pipe; 412-collection box; 413-second connecting plate; 420-rotating cylinder; 430-connecting pipe; 440-driving shaft; 441-rotating shaft; 442-rotating motor; 450-rotating filter mesh; 451-connecting cylinder; 452-connecting frame; 453-rotating filter mesh ; 460- air guide pipe; 470- mounting frame; 500- wind pressure internal wind field air supply assembly; 510- air outlet pipe; 511- air outlet pipe; 512- limit frame; 513- slide; 520- guide drop pipe; 530- storage pipe; 531- storage pipe; 532- mounting plate; 533- first U-shaped card slot; 540- blocking piece; 541- sealing plate; 542- blocking frame; 543- rotating sleeve; 54 4-T-type hanging rod; 545-second nut; 546-sealing ring; 550-impact dust shield; 560-air outlet filter; 570-plug-in exhaust adjustment member; 571-outer end folding plug-in plate; 572-adjusting rod; 573-first compression spring; 574-first nut; 580-air supply interface; 590-elastic clamping member; 591-clamping frame; 592-positioning seat; 593-second compression spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0035] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] The following describes a 3D printing device based on a double-layer wind field according to an embodiment of the present application with reference to the accompanying drawings.

[0037] See also Figures 1 to 10According to the embodiment of the present application, the 3D printing molding device based on the double-layer wind field includes: a 3D printing device 100, a fan assembly 200, an external wind field smoking assembly 300, a rotary dust filter assembly 400 and a wind pressure internal wind field air supply assembly 500.

[0038] See also Figure 1 The fan assembly 200 is arranged on the outside of the top of the 3D printing device 100, the external wind field smoking assembly 300 is arranged on the inside of the top of the 3D printing device 100, the air outlet of the fan assembly 200 is connected to the external wind field smoking assembly 300, and the two ends of the external wind field smoking assembly 300 extend out of the 3D printing device 100 respectively. The rotary dust filter assembly 400 is set to two, and the two rotary dust filter assemblies 400 are respectively connected to the two ends of the external wind field smoking assembly 300 extending out of the 3D printing device 100. The wind pressure internal wind field air supply assembly 500 is composed of a storage mechanism, a filtering structure and a wind pressure exhaust type internal wind field air supply structure from bottom to top. The storage mechanism is connected to the outer side of the lower end of the rotary dust filter assembly 400. Wind pressure is formed at the exhaust part of the wind pressure exhaust type internal wind field air supply structure. Under the action of the wind pressure, the wind pressure exhaust type internal wind field air supply knot supplies air to the 3D printing device 100. The fan assembly 200 is started, and the fan assembly 200 supplies air to the external wind field smoking assembly 300. The external wind field smoking assembly 300 forms a Bernoulli effect by changing the pipe diameter. The external wind field smoking assembly 300 extracts the smoke in the 3D printing device 100, and then takes the smoke away through the external wind field. The smoke taken away flows into the rotary dust filter assembly 400 along with the airflow. The rotary dust filter assembly 400 first filters and reduces the speed of impurities, so that most of the impurities fall into the rotary dust filter assembly 400, and then the rotary dust filter assembly 400 rotates to send the impurities to the rotary filter assembly 400. At the connection point between the dust component 400 and the storage mechanism, as the wind blows, the fallen impurities are sent to the storage mechanism, so as to reduce the content of impurities in the wind in advance. Then, the wind with impurities is decelerated and filtered by the filtering structure, and then discharged through the wind pressure exhaust type internal wind field air supply structure. The size of the air outlet of the wind pressure exhaust type internal wind field air supply structure is controlled to form wind pressure at the discharge point of the wind pressure exhaust type internal wind field air supply structure. Under the action of wind pressure, part of the filtered gas is replenished into the 3D printing equipment 100 to make up for the gas taken away by the extracted smoke, forming an internal wind field circulation. The external wind field takes away the flue gas and does not directly enter the printing cabin of the 3D printing equipment. Then the wind filtered by the external wind field containing flue gas and external impurities is appropriately supplemented into the cabin to make up for the wind lost in the internal wind field due to flue gas emission, forming an internal wind field circulation, so that external impurities and flue gas pass through the same filtration system. The external wind field and the internal wind field form a double-layer wind field, which is beneficial to the circulation and purification of flue gas. During this period, the impurities in the flue gas are decelerated and settled twice, and the impurity content filtered by the outer filter is reduced, which prolongs the use and cleaning time of the outer filter. In addition, the impurities on the internal filter will be detached with the wind, reducing the retention of impurities on the internal filter.

[0039] See also Figure 1 to Figure 2, the 3D printing device 100 includes a 3D printing device body 110, an upper cover 120 and an inner wind field air bleed interface 130, the upper cover 120 is arranged on the open mouth at the top of the 3D printing device body 110, the outer wind field smoking assembly 300 is arranged in the upper cover 120, the air inlet of the outer wind field smoking assembly 300 extends out of the upper end of the upper cover 120, and both ends of the outer wind field smoking assembly 300 extend out of the two ends of the upper cover 120, one end of the inner wind field air bleed interface 130 is connected to the lower end of the inner cabin of the 3D printing device body 110, and the other end of the inner wind field air bleed interface 130 is connected to the wind pressure exhaust type inner wind field air supply structure. The 3D printing device body 110 constructs a three-dimensional object by adding materials layer by layer. The upper cover 120 seals the open mouth at the top of the 3D printing device body 110, so as to absorb smoke at the top of the 3D printing device body 110 and clean the environment inside the 3D printing device body 110. The upper cover 120 is used for installing the external wind farm smoke extraction assembly 300 and the fan assembly 200.

[0040] See also Figures 1 to 3 The fan assembly 200 includes a mounting base 210, a driving motor 220 and a fan 230. The driving motor 220 is fixedly connected to the rear end of the mounting base 210, and the fan 230 is fixedly connected to the front end of the mounting base 210. The rear end of the upper cover 120 has a fixed base 140. The bottom end of the mounting base 210 is fixedly connected to the fixed base 140. The driving motor 220 is drivingly connected to the fan 230, and the air outlet of the fan 230 is connected to the air inlet of the external wind field smoking assembly 300. The mounting base 210 is used to support the driving motor 220 and the fan 230. When the driving motor 220 is started, the driving motor 220 drives the fan 230, and the fan 230 sends the external wind into the external wind field smoking assembly 300.

[0041] See also Figures 1 to 3The external wind field smoking assembly 300 includes an air suction piece 310, an air inlet pipe 320 and a first connecting plate 330. The air suction piece 310 is arranged in plurality. The air suction piece 310 includes a coarse-diameter air collecting pipe 311, a fine-diameter circulation pipe 312, a coarse-diameter exhaust pipe 313 and an air suction port 314. The coarse-diameter air collecting pipes 311 on the plurality of air suction pieces 310 are interconnected through the air inlet pipe 320. Both ends of the coarse-diameter air collecting pipe 311 are connected with the fine-diameter circulation pipe 312. The air suction port 314 is fixedly connected to the lower side of the fine-diameter circulation pipe 312. The outer end of the fine-diameter circulation pipe 312 is connected with the coarse-diameter exhaust pipe 313. The coarse-diameter exhaust pipes 313 at the same end of the plurality of air suction pieces 310 are interconnected through the first connecting plate 330. The first connecting plate 330 is fixedly connected to the rotary dust filter assembly 400. The coarse-diameter exhaust pipe 313 is connected to the rotary dust filter assembly 400. The fan 230 sends the external wind into the air inlet pipe 320, and then the air inlet pipe 320 sends the wind into the large-diameter air collecting pipe 311 of the plurality of air suction members 310, and then the large-diameter air collecting pipe 311 enters the small-diameter flow pipe 312, and then passes through the large-diameter exhaust pipe 313. In the process of the wind passing through the large-diameter air collecting pipe 311 to the small-diameter flow pipe 312 and then to the large-diameter exhaust pipe 313, the suction force is formed at the air inlet 314 on the small-diameter flow pipe 312 by the Bernoulli principle, and the smoke in the 3D printing device 100 is extracted, and the smoke flows into the large-diameter exhaust pipe 313 along with the external wind field.

[0042] See also Figures 1 to 4The rotary dust filter assembly 400 includes an air induction member 410, a rotary drum 420, a connecting pipe 430, a driving shaft member 440, a rotary filter mesh member 450 and an air guide pipe 460. The inner side of the upper end of the air induction member 410 is connected to the external wind field smoking assembly 300. The lower side of the air induction member 410 and the upper side of the rotary drum 420 are connected through the connecting pipe 430. The inner and outer sides of the connecting pipe 430 are in an inwardly concave arc shape. One end of the air guide pipe 460 is fixedly connected to the rotary drum. 420 outside, the other end of the air guide duct 460 is fixedly connected between the storage mechanism and the filtering structure of the wind pressure internal wind field air supply component 500, the rear end of the driving shaft 440 is arranged at the rear end of the driving shaft 440, the front end of the driving shaft 440 rotates and passes through the inside of the rotating drum 420, the rotating filter mesh 450 is fixedly sleeved on the driving shaft 440, and both sides and the outer edge of the rotating filter mesh 450 slide on the inner wall and the curved inner wall of the rotating drum 420. The external wind field flows into the air induction member 410 through the coarse-diameter exhaust pipe 313, and then flows into the rotary drum 420 through the air induction member 410 and the connecting pipe 430. The impurities in the external wind field are filtered and decelerated by the rotary filter mesh 450 and settled on the rotary filter mesh 450 near the connecting pipe 430. The impurities that are decelerated due to impact in the air induction member 410 will also fall onto the rotary filter mesh 450 following the concave arc of the connecting pipe 430. As the driving shaft member 440 drives the rotary filter mesh 450 to rotate, the rotary filter mesh 450 with settled impurities is transferred to the air guide pipe 460, and the external wind field also flows out from the air guide pipe 460 to form an airflow. Driven by the airflow, the impurities in the rotary filter mesh 450 are driven to the air guide pipe 460, and finally converge to the storage mechanism under the action of gravity.

[0043] See also Figures 1 to 5 The air induction member 410 includes an air induction pipe 411, a collection box 412 and a second connecting plate 413. A plurality of air induction pipes 411 are fixedly connected to the inner side of the collection box 412. The ends of the plurality of air induction pipes 411 away from the collection box 412 are connected by the second connecting plate 413. The second connecting plate 413 is fixedly connected to the end of the external wind field smoking assembly 300 extending out of the 3D printing device 100. The upper end of the connecting pipe 430 is connected to the lower side of the collection box 412. The second connecting plate 413 and the first connecting plate 330 are connected to each other by bolts and nuts. The large-diameter exhaust pipe 313 and the air induction pipe 411 correspond to each other and are connected to each other. The external wind field passes through the air induction pipe 411 and is collected to the collection box 412, and then flows into the connecting pipe 430 from the collection box 412. By releasing the connection between the second connecting plate 413 and the first connecting plate 330, the rotary dust filter assembly 400 and the wind pressure internal wind field air supply assembly 500 can be removed for maintenance and replacement.

[0044] See also Figures 1 to 6The driving shaft 440 includes a shaft 441 and a rotary motor 442. The rear end of the rotary drum 420 is fixedly connected to a mounting frame 470. The rotary motor 442 is fixedly connected to the mounting frame 470. The shaft 441 is located in the rotary drum 420. The two ends of the shaft 441 rotate and penetrate the front and rear ends of the rotary drum 420 respectively. The rear end of the shaft 441 extends out of the rear end of the rotary drum 420. The rotary motor 442 is connected to the rear end of the shaft 441. The rotary filter mesh 450 is fixedly sleeved on the shaft 441. The rotary motor 442 drives the shaft 441, and the shaft 441 drives the rotary filter mesh 450 to change positions. The rotary filter mesh 450 undergoes initial filtration and deceleration, and its main purpose is to decelerate the impurities so that they can be gathered to the storage mechanism.

[0045] See also Figures 1 to 6 The rotary filter element 450 includes a connecting cylinder 451, a connecting frame 452 and a rotary filter 453. The connecting frame 452 is arranged at equal intervals outside the connecting cylinder 451. The two sides and the outer edge of the connecting frame 452 slide on the inner side walls and the arc inner wall of the front and rear ends of the rotary cylinder 420 respectively. The rotary filter 453 is arranged in the connecting frame 452. A spline is arranged on the outer wall of the rotating shaft 441, and a spline groove is arranged in the connecting cylinder 451. Through the cooperation of the spline and the spline groove, the rotating shaft 441 drives the connecting cylinder 451, the connecting cylinder 451 drives the connecting frame 452, and the rotary filter 453 rotates with the connecting frame 452.

[0046] See also Figures 1 to 7The storage mechanism includes a guide drop pipe 520, a storage pipe 530 and a blocking member 540. The filtering structure includes an air outlet pipe 510, an impact dust shield 550 and an air outlet filter 560. The wind pressure exhaust type internal wind field air supply structure includes a plug-in exhaust adjustment member 570 and an air supply interface 580. The bottom end of the guide drop pipe 520 is tilted outward and arranged at the bottom end of the air outlet pipe 510. The storage pipe 530 is fixedly connected to the bottom end of the guide drop pipe 520. The blocking member 540 is connected to the bottom end of the storage pipe 530. The blocking member 540 seals the bottom end of the storage pipe 530. The outer side of the rotary dust filter assembly 400 is fixedly connected to the lower end of the air outlet pipe 510. The impact dust shield 550 is provided in plurality. The plurality of impact dust shields 550 are staggeredly arranged inside the air outlet pipe 510, and the plurality of impact dust shields The outer ends of 550 are all tilted downward, and multiple air outlets are formed between the outer ends of multiple impact dust shields 550 and the inner wall of the air outlet pipe 510. The multiple air outlets are arranged in a staggered manner. A raised baffle is provided on the lower side of the impact dust shield 550. The upper end of the air outlet filter 560 is connected to the upper end of the air outlet pipe 510. One end of the plug-in exhaust adjustment component 570 is provided on the outer side of the upper end of the air outlet pipe 510, and the other end of the plug-in exhaust adjustment component 570 is slidably plugged into the inside of the air outlet pipe 510. The plug-in exhaust adjustment component 570 is located at the upper end of the air outlet filter 560. One end of the air supply interface 580 is fixedly connected to the inside of the air outlet pipe 510. The air supply interface 580 is located between the air outlet filter 560 and the plug-in exhaust adjustment component 570. The air supply interface 580 is connected to the lower end of the inner cabin of the 3D printing device 100. The wind flowing out through the air guide 460 flows into the air outlet duct 510, and the flowing external wind field drives the impurities settled on the rotary filter 453 into the guide droplet pipe 520, and flows into the storage pipe 530 under the action of gravity. As the impurities in the air outlet duct 510 flow into the external wind field, they first hit the inner wall of the air outlet duct 510 to slow down and settle, and then flow back to the air outlet at the lower end to flow upward. The flowing external wind field drives the impurities to pass through the staggered air outlets in turn. The external wind field flowing upward through the air outlet drives the impurities to hit the dust shield 550 in turn, and the raised baffle bars on the lower side of the dust shield 550 block the impurities. This reduces the impurities in the external air that eventually flows through the air outlet filter 560. After being finally filtered by the air outlet filter 560, the external air flows to the outside through the gap between the plug-in exhaust adjustment component 570 and the air outlet pipe 510. Wind pressure is formed in the space between the lower side of the plug-in exhaust adjustment component 570 and the air outlet filter 560. Under the action of the wind pressure, part of the gas flows to the inner wind field air intake interface 130 through the air supply interface 580, and then enters the 3D printing device 100 through the inner wind field air intake interface 130, so as to make up for the gas lost by the 3D printing device 100 due to the smoke absorbed by the external wind field smoking component 300.

[0047] See also Figures 1 to 7The air outlet pipe 510 includes an air outlet pipe 511 and a limiting frame 512. A sliding groove 513 is provided on the outer side of the upper end of the air outlet pipe 511. The limiting frame 512 is fixedly connected to the inner part of the upper end of the air outlet pipe 511. The air outlet filter 560 is arranged on the upper side of the limiting frame 512. The plug-in exhaust adjustment member 570 is slidably plugged into the sliding groove 513. The limiting frame 512 provides support for the air outlet filter 560. The sliding groove 513 on the air outlet pipe 511 facilitates the installation of the plug-in exhaust adjustment member 570.

[0048] See also Figures 1 to 8 The plug-in exhaust adjustment member 570 includes an outer folding plug-in plate 571, an adjustment rod 572, a first compression spring 573 and a first nut 574. The adjustment rod 572 is fixedly connected to the outer side of the upper end of the air outlet pipe 511, one end of the outer folding plug-in plate 571 is slidably connected to the adjustment rod 572, the first nut 574 is threadedly connected to the adjustment rod 572, the first nut 574 is pressed against the outer side of one end of the outer folding plug-in plate 571, the first compression spring 573 is sleeved on the adjustment rod 572, the two ends of the first compression spring 573 are respectively pressed against the inner side of one end of the outer folding plug-in plate 571 and the outer side of the air outlet pipe 511, the other end of the outer folding plug-in plate 571 is slidably plugged into the inside of the air outlet pipe 511, and the gap between the end of the outer folding plug-in plate 571 and the air outlet pipe 511 forms an exhaust port. When adjusting the speed of the gas flowing into the 3D printing device 100, the first nut 574 is rotated, and the first nut 574 moves along the adjustment rod 572. The first nut 574 drives the outer folding plug-in plate 571 to move into the outlet pipe 511, and the exhaust port formed by the gap between the end of the outer folding plug-in plate 571 and the outlet pipe 511 is reduced, and the wind pressure between the lower side of the plug-in exhaust adjustment member 570 and the outlet filter 560 is increased, and the flow rate flowing into the inner wind field air intake interface 130 through the air supply interface 580 is increased, and the inner wind field flowing into the 3D printing device 100 from the inner wind field air intake interface 130 is from bottom to top, which is convenient for taking away the smoke generated by 3D printing. On the contrary, the first nut 574 is rotated in the opposite direction to increase the exhaust port area, reduce the wind pressure between the lower side of the plug-in exhaust adjustment member 570 and the outlet filter 560, and reduce the flow rate flowing into the inner wind field air intake interface 130 through the air supply interface 580. The stability of the inner wind field is maintained through this adjustment.

[0049] See also Figures 1 to 8An elastic pressing piece 590 is arranged between the outer end folding plug-in plate 571 and the air outlet filter 560. The elastic pressing piece 590 includes a pressing frame 591, a positioning seat 592 and a second compression spring 593. Two pressing frames 591 are provided. The two pressing frames 591 are both slidably plugged into the interior of the upper end of the air outlet pipe 511. The positioning seats 592 are respectively arranged on the inner walls at the front and rear ends of the pressing frame 591. The upper and lower ends of the second compression spring 593 are respectively inserted into the positioning seats 592 relative to each other between the two pressing frames 591. The lower side of the outer end folding plug-in plate 571 is pressed against the upper pressing frame 591, and the lower pressing frame 591 presses the air outlet filter 560 against the limit frame 512. When it is necessary to remove the air outlet filter 560, unscrew the first nut 574 to lower the adjusting rod 572, and then pull the outer end folding plug-in plate 571 out of the adjusting rod 572, so that the outer end folding plug-in plate 571 leaves the adjusting rod 572, and the outer end folding plug-in plate 571 releases the pressure on the upper clamping frame 591, and pull out the upper clamping frame 591, the second compression spring 593 and the lower clamping frame 591, and then pull out the air outlet filter 560 for cleaning and replacement, and use the outer end folding plug-in plate 571 of the adjustable exhaust port to clamp and fix the air outlet filter 560, and vice versa, install the air outlet filter 560.

[0050] See also Figures 1 to 9 The storage tube 530 includes a storage tube 531 and a mounting plate 532. A first U-shaped clamping groove 533 is formed on the outer side of the mounting plate 532. The mounting plate 532 is fixedly connected to the outer walls of the front and rear sides of the upper end of the storage tube 531. The front and rear ends of the plugging member 540 are respectively mounted on the first U-shaped clamping groove 533 on the mounting plate 532. The plugging member 540 is pressed and locked on the mounting plate 532, and the connection between the plugging member 540 and the mounting plate 532 is turned over to release the connection. The plugging member 540 is then pulled out, and the impurities in the storage tube 531 are taken out as the plugging member 540 is pulled out, so that the impurities are conveniently processed.

[0051] See also Figures 1 to 10The blocking member 540 includes a sealing plate 541, a blocking frame 542, a rotating sleeve 543, a T-shaped hanging rod 544, a second nut 545 and a sealing ring 546. The blocking frame 542 is fixedly connected to the upper side of the sealing plate 541, and the blocking frame 542 is inserted into the lower end of the storage tube 531. The sealing ring 546 is fixedly connected to the upper side of the sealing plate 541. The sealing ring 546 is located at the outer periphery of the blocking frame 542. The lower end of the storage tube 531 is pressed against the sealing ring 546. The front and rear ends of the sealing plate 541 are respectively provided with a second U-shaped clamping groove. The rotating sleeve 54 There are four rotating sleeves 543, which are respectively fixedly connected to the lower side of the sealing plate 541, and the four rotating sleeves 543 are respectively distributed on both sides of the two second U-shaped clamping grooves. The two sides of the lower end of the T-shaped hanging rod 544 are respectively rotatably connected to the two rotating sleeves 543 on both sides of the second U-shaped clamping groove. After the T-shaped hanging rod 544 is turned up, it can be clamped into the second U-shaped clamping groove and the first U-shaped clamping groove 533. The second nut 545 is threadedly sleeved on the upper end of the T-shaped hanging rod 544, and the second nut 545 is pressed against the upper side of the hanging plate 532. It should be noted that the first nut 574 and the second nut 545 are both butterfly nuts, which are convenient for manually tightening and loosening the first nut 574 and the second nut 545. When cleaning the impurities in the quality storage tube 531, loosen the second nut 545 to release the pressure of the second nut 545 on the hanging plate 532, and flip the upper end of the T-shaped hanging rod 544 downward to achieve the purpose of releasing the connection of the blocking member 540, and pull the blocking frame 542 out of the quality storage tube 531, and the impurities are pulled out along with the blocking frame 542. After the impurities are cleaned, install the blocking member 540 in the reverse order, and the sealing ring 546 seals the bottom end of the quality storage tube 531.

[0052] Specifically, the working principle of the 3D printing molding device based on the double-layer wind field is as follows: the driving motor 220 is started, the driving motor 220 drives the fan 230, the fan 230 sends the external wind into the air inlet pipe 320, and then the air inlet pipe 320 sends the wind into the large-diameter air collecting pipe 311 of the plurality of air suction members 310, and then the large-diameter air collecting pipe 311 enters the small-diameter circulation pipe 312, and then passes through the large-diameter exhaust pipe 313. In the process of the wind passing through the large-diameter air collecting pipe 311 to the small-diameter circulation pipe 312 and then to the large-diameter exhaust pipe 313, the suction force is formed at the air inlet 314 on the small-diameter circulation pipe 312 by the Bernoulli principle, and the smoke in the 3D printing device 100 is extracted, and the smoke flows into the large-diameter exhaust pipe 313 along with the external wind field. The external wind field flows into the induced draft pipe 411 through the large-diameter exhaust pipe 313 and then is collected in the collecting box 412, and then flows into the connecting pipe 430 from the collecting box 412, and then flows into the rotary drum 420. The impurities in the external wind field are filtered and decelerated by the rotary filter 453 near the connecting pipe 430, and settle on the rotary filter 453. The impurities decelerated by impact in the collecting box 412 will also fall into the rotary filter 453 along the concave arc of the connecting pipe 430. The rotating shaft 441 drives the connecting cylinder 451, and the connecting cylinder 451 drives the rotary filter screen 453 with impurities deposited thereon to transfer to the air guide pipe 460, and the external wind field also flows out from the air guide pipe 460 to form an external wind field airflow. The flowing external wind field airflow drives the impurities deposited on the rotary filter screen 453 into the guiding falling material pipe 520, and flows into the storage pipe 531 under the action of gravity, so as to facilitate the centralized treatment of impurities, and as the external wind field flows into the air outlet pipe 511, the impurities are discharged to the air outlet pipe 511. The impurities first hit the inner wall of the air outlet 511 to slow down and settle, and then flow back to the air outlet at the lower end to flow upward. The flowing external wind field drives the impurities to pass through the staggered air outlets in sequence. The external wind field flowing upward through the air outlet drives the impurities to hit the dust shield 550 in sequence. The raised baffles on the lower side of the dust shield 550 block the impurities, thereby reducing the impurities in the external field wind that finally flows through the air outlet filter 560. After finally being filtered by the air outlet filter 560, it is discharged through the exhaust port, and the area of ​​the exhaust port is smaller than the cross-sectional area of ​​the air outlet 511. The space between the outer end folding plug-in board 571 and the air outlet filter 560 forms wind pressure. Under the action of wind pressure, part of the gas flows to the inner wind field air intake interface 130 through the air supply interface 580, and then enters the 3D printing device 100 through the inner wind field air intake interface 130, to make up for the gas lost by the 3D printing device 100 due to the smoke absorption of the external wind field smoking component 300.The external wind field takes away the flue gas and does not directly enter the printing cabin of the 3D printing equipment. Then the wind filtered by the external wind field containing flue gas and external impurities is appropriately supplemented into the cabin to make up for the wind lost in the internal wind field due to flue gas emission, forming an internal wind field circulation, so that external impurities and flue gas pass through the same filtration system. The external wind field and the internal wind field form a double-layer wind field, which is beneficial to the circulation and purification of flue gas. During this period, the impurities in the flue gas are decelerated and settled twice, and the impurity content filtered by the outer filter is reduced, which prolongs the use and cleaning time of the outer filter. In addition, the impurities on the internal filter will be detached with the wind, reducing the retention of impurities on the internal filter.

[0053] When adjusting the speed of the gas flowing into the 3D printing device 100, the first nut 574 is rotated, and the first nut 574 moves along the adjustment rod 572. The first nut 574 drives the outer folding plug-in plate 571 to move into the outlet pipe 511, and the exhaust port formed by the gap between the end of the outer folding plug-in plate 571 and the outlet pipe 511 is reduced, and the wind pressure between the lower side of the plug-in exhaust adjustment member 570 and the outlet filter 560 is increased, and the flow rate flowing into the inner wind field air intake interface 130 through the air supply interface 580 is increased, and the inner wind field flowing into the 3D printing device 100 from the inner wind field air intake interface 130 is from bottom to top, which is convenient for taking away the smoke generated by 3D printing. On the contrary, the first nut 574 is rotated in the opposite direction to increase the exhaust port area, reduce the wind pressure between the lower side of the plug-in exhaust adjustment member 570 and the outlet filter 560, and reduce the flow rate flowing into the inner wind field air intake interface 130 through the air supply interface 580. The stability of the inner wind field is maintained through this adjustment.

[0054] It should be noted that the specific models and specifications of the drive motor 220, the fan 230 and the rotary motor 442 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the field, so it will not be repeated in detail.

[0055] The power supply and principles of the drive motor 220, the fan 230 and the rotary motor 442 are clear to those skilled in the art and will not be described in detail herein.

[0056] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A 3D printing device based on a double-layer wind field, comprising: The 3D printing device is characterized by further comprising: A fan assembly, the fan assembly being arranged outside the top of the 3D printing device; An external wind field smoking component, the external wind field smoking component is arranged inside the top of the 3D printing device, the air outlet of the fan component is connected to the external wind field smoking component, and the two ends of the external wind field smoking component extend out of the 3D printing device respectively, the external wind field smoking component includes an air suction member, an air inlet pipe and a first connecting plate, the air suction member is provided in plurality, the air suction member includes a thick-diameter air collecting pipe, a thin-diameter flow pipe, a thick-diameter exhaust pipe and an air suction port, the thick-diameter air collecting pipes on the plurality of air suction members are interconnected through the air inlet pipe, the two ends of the thick-diameter air collecting pipe are both connected with the thin-diameter flow pipe, the air suction port is fixedly connected to the lower side of the thin-diameter flow pipe, the outer end of the thin-diameter flow pipe is connected with the thick-diameter exhaust pipe, and the thick-diameter exhaust pipes at the same end of the plurality of air suction members are interconnected through the first connecting plate; A rotary dust filter assembly, wherein two rotary dust filter assemblies are provided, and the two rotary dust filter assemblies are respectively connected to the two ends of the external wind field smoking assembly extending out of the 3D printing device, the first connecting plate is fixedly connected to the rotary dust filter assembly, and the coarse-diameter exhaust pipe is connected to the rotary dust filter assembly; A wind pressure internal wind field air supply component, wherein the wind pressure internal wind field air supply component is composed of a storage mechanism, a filtering structure and a wind pressure exhaust type internal wind field air supply structure from bottom to top, wherein the storage mechanism is connected to the outer side of the lower end of the rotary dust filter component, and wind pressure is formed at the exhaust part of the wind pressure exhaust type internal wind field air supply structure. Under the action of wind pressure, the wind pressure exhaust type internal wind field air supply node supplies air into the 3D printing device.

2. The 3D printing device based on a double-layer wind field according to claim 1 is characterized in that: The 3D printing device includes a 3D printing device body, an upper cover and an inner wind field air bleed interface, the upper cover is arranged on the open opening at the top of the 3D printing device body, the outer wind field smoking assembly is arranged in the upper cover, the air inlet of the outer wind field smoking assembly extends out of the upper end of the upper cover, both ends of the outer wind field smoking assembly extend out of the two ends of the upper cover, one end of the inner wind field air bleed interface is connected to the lower end of the inner cabin of the 3D printing device body, and the other end of the inner wind field air bleed interface is connected to the wind pressure exhaust type inner wind field air supply structure.

3. The 3D printing device based on a double-layer wind field according to claim 2 is characterized in that: The fan assembly includes a mounting base, a drive motor and a fan, the drive motor is fixedly connected to the rear end of the mounting base, the fan is fixedly connected to the front end of the mounting base, the rear end of the upper cover has a fixed base, the bottom end of the mounting base is fixedly connected to the fixed base, the drive motor is transmission-connected to the fan, and the air outlet of the fan is connected to the air inlet of the external wind field smoking assembly.

4. The 3D printing device based on a double-layer wind field according to claim 1 is characterized in that: The rotary dust filter assembly includes an air induced draft member, a rotary drum, a connecting pipe, a driving shaft member, a rotary filter mesh member and an air guide duct. The inner side of the upper end of the air induced draft member is connected to the external wind field smoking assembly, and the lower side of the air induced draft member and the upper side of the rotary drum are connected through the connecting pipe. The connecting pipe has concave arcs on both sides. One end of the air guide duct is fixedly connected to the outside of the rotary drum, and the other end of the air guide duct is fixedly connected between the storage mechanism and the filtering structure of the wind pressure internal wind field air supply assembly. The rear end of the driving shaft member is arranged at the rear end of the driving shaft member, and the front end of the driving shaft member rotates and passes through the interior of the rotary drum. The rotary filter mesh member is fixedly sleeved on the driving shaft member, and both sides and the outer edge of the rotary filter mesh member slide on the inner side wall and the arc-shaped inner wall of the rotary drum.

5. The 3D printing device based on a double-layer wind field according to claim 4 is characterized in that: The air induced component includes an air induced pipe, a collecting box and a second connecting plate. A plurality of the air induced pipes are fixedly connected to the inner side of the collecting box. The ends of the plurality of air induced pipes away from the collecting box are connected by the second connecting plate. The second connecting plate is fixedly connected to the end of the external wind field smoking assembly extending out of the 3D printing device. The upper end of the connecting pipe is connected to the lower side of the collecting box.

6. The 3D printing device based on a double-layer wind field according to claim 4 is characterized in that: The driving rotating shaft member includes a rotating shaft and a rotary motor. The rear end of the rotating drum is fixedly connected to a mounting frame, and the rotary motor is fixedly connected to the mounting frame. The rotating shaft is located in the rotating drum. Both ends of the rotating shaft rotate and penetrate the front and rear ends of the rotating drum respectively. The rear end of the rotating shaft extends out of the rear end of the rotating drum. The rotary motor is transmission-connected to the rear end of the rotating shaft, and the rotary filter mesh member is fixedly sleeved on the rotating shaft.

7. The 3D printing device based on a double-layer wind field according to claim 4 is characterized in that: The rotary filter screen comprises a connecting cylinder, a connecting frame and a rotary filter screen. The connecting frames are arranged at equal intervals on the outside of the connecting cylinder. The two sides and the outer edges of the connecting frame slide on the inner side walls and the arc-shaped inner wall at the front and rear ends of the rotary cylinder respectively. The rotary filter screen is arranged in the connecting frame.

8. The 3D printing device based on a double-layer wind field according to claim 1, characterized in that: The storage mechanism includes a guide drop-mass pipe, a mass storage pipe fitting and a sealing member, the filtering structure includes an air outlet pipe fitting, an impact dust shield plate and an air outlet filter, the wind pressure exhaust type internal wind field air supply structure includes a plug-in exhaust adjustment member and an air supply interface, the bottom end of the guide drop-mass pipe is tilted outwardly and arranged at the bottom end of the air outlet pipe fitting, the mass storage pipe fitting is fixedly connected to the bottom end of the guide drop-mass pipe, the sealing member is connected to the bottom end of the mass storage pipe fitting, the sealing member seals the bottom end of the mass storage pipe fitting, the outer side of the rotating dust filter assembly is fixedly connected to the lower end of the air outlet pipe fitting, the impact dust shield plate is provided in plurality, the plurality of impact dust shield plates are staggeredly arranged inside the air outlet pipe fitting, and the outer ends of the plurality of impact dust shield plates are all inclined outwardly The air outlet is arranged in a staggered manner, and a raised baffle is provided on the lower side of the impact dust shield. The upper end of the air outlet filter is connected to the upper end of the air outlet duct. One end of the plug-in exhaust adjustment component is provided on the outer side of the upper end of the air outlet duct, and the other end of the plug-in exhaust adjustment component is slidably plugged into the interior of the air outlet duct. The plug-in exhaust adjustment component is located at the upper end of the air outlet filter. One end of the air supply interface is fixedly connected to the interior of the air outlet duct, and the air supply interface is located between the air outlet filter and the plug-in exhaust adjustment component. The air supply interface is connected to the lower end of the inner cabin of the 3D printing equipment.

9. The 3D printing device based on a double-layer wind field according to claim 8, characterized in that: The air outlet pipe assembly includes an air outlet pipe and a limit frame. A slide groove is provided on the outer side of the upper end of the air outlet pipe. The limit frame is fixedly connected to the inner part of the upper end of the air outlet pipe. The air outlet filter is arranged on the upper side of the limit frame. The plug-in exhaust adjustment component is slidably plugged into the slide groove.

10. The 3D printing device based on a double-layer wind field according to claim 9, characterized in that: The plug-in exhaust adjustment component includes an outer end folding plug-in plate, an adjustment rod, a first compression spring and a first nut. The adjustment rod is fixedly connected to the outer side of the upper end of the air outlet pipe, one end of the outer end folding plug-in plate is slidably connected to the adjustment rod, the first nut is connected to the adjustment rod by a thread, the first nut is pressed tightly on the outer side of one end of the outer end folding plug-in plate, the first compression spring is sleeved on the adjustment rod, two ends of the first compression spring are respectively pressed tightly on the inner side of one end of the outer end folding plug-in plate and the outer side of the air outlet pipe, and the other end of the outer end folding plug-in plate is slidably plugged into the inside of the air outlet pipe.

11. The 3D printing device based on a double-layer wind field according to claim 10, characterized in that: An elastic pressing part is arranged between the outer end folding plug-in plate and the air outlet filter, and the elastic pressing part includes a pressing frame, a positioning seat and a second compression spring. The pressing frames are provided in two, and the two pressing frames are both slidably plugged into the interior of the upper end of the air outlet pipe. The positioning seats are respectively arranged on the inner walls at the front and rear ends of the pressing frame, and the upper and lower ends of the second compression spring are respectively inserted into the positioning seats relative to the two pressing frames. The lower side of the outer end folding plug-in plate is pressed against the upper pressing frame, and the lower pressing frame presses the air outlet filter against the limit frame.

12. The 3D printing device based on a double-layer wind field according to claim 8, characterized in that: The quality storage tube component includes a quality storage tube and a hanging plate, a first U-shaped clip groove is opened on the outer side of the hanging plate, the hanging plate is fixedly connected to the outer walls on the front and rear sides of the upper end of the quality storage tube, and the front and rear ends of the sealing member are respectively hung on the first U-shaped clip groove on the hanging plate.

13. The 3D printing device based on a double-layer wind field according to claim 12, characterized in that: The sealing member includes a sealing plate, a blocking frame, a rotating sleeve, a T-shaped hanging rod, a second nut and a sealing ring, the blocking frame is fixedly connected to the upper side of the sealing plate, the blocking frame is inserted into the interior of the lower end of the storage tube, the sealing ring is fixedly connected to the upper side of the sealing plate, the sealing ring is located at the outer periphery of the blocking frame, the lower end of the storage tube is pressed against the sealing ring, the front and rear ends of the sealing plate are respectively provided with second U-shaped clamping grooves, four rotating sleeves are provided, the four rotating sleeves are respectively fixedly connected to the lower side of the sealing plate, the four rotating sleeves are respectively distributed on both sides of the two second U-shaped clamping grooves, the two sides of the lower end of the T-shaped hanging rod are respectively rotatably connected to the two rotating sleeves on both sides of the second U-shaped clamping groove, the T-shaped hanging rod can be snapped into the second U-shaped clamping groove and the first U-shaped clamping groove after being flipped up, the second nut is threadedly sleeved on the upper end of the T-shaped hanging rod, and the second nut is pressed against the upper side of the hanging plate.

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