A dust removal device for 3D printer

Abstract

The utility model relates to the technical field of dust removal, and proposes a dust removal device for a 3D printer, including a dust removal space in a shell, an air inlet and an air outlet on the shell, both of which are connected to the dust removal space; a dust removal device is arranged in the dust removal space, both of which are connected to the dust removal device, and the dust removal device is used to remove metal dust and residue in the exhaust gas dust; a passivation part includes: a material storage part is arranged in the dust removal space, the material storage part has a material storage space, the material storage space is connected to the air inlet, and the material storage space is used to store passivation powder; a dust pipe is arranged in the dust removal space, the dust pipe is arranged above the material storage space, and the dust pipe has a plurality of air outlet pipes, and the air outlet pipes face the passivation powder in the material storage space. Through the above technical scheme, the problem that the traditional cooling and explosion-proof method in the prior art cannot be reduced to the specified temperature at the initial startup, and the device still has explosion hazards is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal, and specifically to a dust removal device for a 3D printer. Background Art

[0002] During the 3D printing of metal parts, while maintaining a high-purity oxygen-free gas environment in the printing room, it is necessary to promptly remove the metal dust and residues generated during the printing process to prevent danger. The machine must recycle the protective gas used in the printing room. Monitor the temperature of the circulating gas in the system and reduce the gas temperature in the system through a condenser. Before starting the machine, use protective gas to remove oxygen in the closed system and monitor the oxygen content in the system. When removing dust, in order to prevent dust explosion accidents, it is usually cooled by lowering the temperature, but this method does not have a significant cooling effect at the initial startup, which is prone to safety accidents. Utility Model Content

[0003] The utility model provides a dust removal device for a 3D printer, which solves the problem that the traditional temperature reduction and explosion-proof method in the related art cannot be reduced to a specified temperature during initial startup, resulting in the device still having explosion hazards.

[0004] The technical solution of the utility model is as follows:

[0005] A dust removal device for a 3D printer, comprising:

[0006] A shell, wherein the shell has a dust removal space, and the shell has an air inlet and an air outlet, wherein the air inlet and the air outlet are both connected to the dust removal space;

[0007] A dust removal device is arranged in the dust removal space, the air inlet and the air outlet are both connected to the dust removal device, and the dust removal device is used to remove metal dust and residue in the exhaust gas dust;

[0008] A passivation member is arranged in the dust removal space, and is used to spray a passivation agent on the gas containing dust, and the passivation member includes:

[0009] A material storage member, arranged in the dust removal space, wherein the material storage member has a material storage space, the material storage space is communicated with the air inlet, and the material storage space is used to store the passivation powder;

[0010] A dust-generating pipe is arranged in the dust removal space, the dust-generating pipe is arranged above the material storage space, and the dust-generating pipe is provided with a plurality of air outlet pipes, and the air outlet pipes face the passivation powder in the material storage space.

[0011] Optionally, the passivation member further comprises:

[0012] A stirring shaft, rotatably disposed in the material storage space;

[0013] A stirring blade is arranged on the stirring shaft, and when the stirring shaft rotates, the stirring blade rotates synchronously;

[0014] A driving member is arranged on the stirring shaft, and the driving member is used to drive the stirring shaft to rotate.

[0015] Optionally, also include:

[0016] A cooling box is arranged between the dust removal device and the gas outlet, and the cooling box is used to cool the gas.

[0017] Optionally, the dust removal device is divided into multiple stages of dust removal.

[0018] Optionally, the dust removal device includes:

[0019] A cyclone dust collector is arranged in the dust removal space, the cyclone dust collector is arranged between the air inlet and the passivation member, and the cyclone dust collector is used to remove large particle impurities in the exhaust gas;

[0020] A sintered mesh filter, disposed between the passivation element and the cooling box, the sintered mesh filter being used to further remove particulate impurities in the exhaust gas;

[0021] A precision filter is arranged between the sintered mesh filter and the cooling box, and the precision filter is used to completely remove impurities in the exhaust gas.

[0022] Optionally, also include:

[0023] There are several ash hoppers, which are detachably arranged at the bottom of the cyclone dust collector and the sintered mesh filter, and are used to receive dust filtered by the filter.

[0024] Optionally, also include:

[0025] An alarm detector is arranged on the ash hopper, and the alarm detector is used to detect the amount of dust in the ash hopper.

[0026] Optionally, also include:

[0027] The tail gas filtering device is arranged on the discharge port, and the tail gas filtering device is used to filter the tail gas.

[0028] The working principle and beneficial effects of the utility model are:

[0029] In the utility model, the shell plays a supporting and protective role, and can provide support and protection for the dust removal and passivation components inside the shell. The dust removal device is connected to the air inlet. When the exhaust gas of the printer enters, the dust removal device will remove the metal dust and residue in the exhaust gas, so that the exhaust gas no longer contains dust, so that the protective gas used inside the printer can be recycled. The safety of the protective gas inside the printer is guaranteed, and the dust inside the protective gas is prevented from exploding. In addition, the service life of the printer is guaranteed, and a large amount of dust accumulation is prevented from affecting the use of the printer. When dust in the printer enters the device, the dust is prone to explosion due to the presence of metal dust or other combustible particles. Adding a passivator through the passivation part at the connection position can reduce the concentration of combustible dust, thereby reducing the risk of dust explosion and ensuring the safety of the equipment. The storage part is used to store the passivator, and the passivator uses a non-combustible powder similar to the combustible dust to reduce the concentration of dust. The dust-raising pipe can blow nitrogen and other protective gases into the interior of the storage part, and by blowing air onto the surface of the passivator, the powder is floated inside the storage part. When the exhaust gas flows through the storage part, the exhaust gas inside the pipe connected to the storage part will flow at high speed, forming a negative pressure in the pipe connected to the passivation part. The gas carrying non-combustible powder will be sucked into the exhaust gas, thereby diluting the concentration of combustible dust and improving the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 This is a schematic diagram of the internal structure of the housing in the utility model;

[0033] Figure 3 It is a schematic diagram of the structure of the passivation component in the utility model.

[0034] In the figure: 1. shell, 2. dust removal space, 3. air inlet, 4. air outlet, 5. dust removal device, 6. passivation part, 7. storage part, 8. storage space, 9. dust pipe, 10. air outlet pipe, 11. stirring shaft, 12. stirring blade, 13. driving part, 14. cooling box, 15. cyclone dust collector, 16. sintered mesh filter, 17. ash hopper, 18. alarm detector, 19. exhaust gas filtering device, 20. precision filter. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, they can also be understood as further technical solutions without paying creative work. In some figures, components with the same structure or function are only schematically illustrated, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0036] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Reference Figure 1~Figure 3 , which is the first embodiment of the utility model, proposes a dust removal device 5 for a 3D printer, comprising: a dust removal space 2 is provided in a shell 1, an air inlet 3 and an air outlet 4 are provided on the shell 1, and the air inlet 3 and the air outlet 4 are both connected to the dust removal space 2; the dust removal device 5 is arranged in the dust removal space 2, and the air inlet 3 and the air outlet 4 are both connected to the dust removal device 5, and the dust removal device 5 is used to remove metal dust and residue in the exhaust dust; a passivation component 6 is arranged in the dust removal space 2, and the passivation component 6 is used to spray a passivation agent on the gas containing dust, and the passivation component 6 includes: a storage component 7 is arranged in the dust removal space 2, and the storage component 7 has a storage space 8, and the storage space 8 is connected to the air inlet 3, and the storage space 8 is used to store passivation powder; a dust pipe 9 is arranged in the dust removal space 2, and the dust pipe 9 is arranged above the storage space 8, and the dust pipe 9 has a plurality of outlet pipes 10, and the outlet pipes 10 face the passivation powder in the storage space 8.

[0039] In this embodiment, the housing 1 plays a supporting and protective role, and can provide support and protection for the dust removal and passivation components inside the housing 1. The dust removal device 5 is connected to the air inlet 3. When the exhaust gas of the printer enters, the dust removal device 5 will remove the metal dust and residue in the exhaust gas, so that the exhaust gas no longer contains dust, so that the protective gas used inside the printer can be recycled. The safety of the protective gas inside the printer is guaranteed, the dust inside the protective gas is prevented from exploding, the service life of the printer is guaranteed, and a large amount of dust is prevented from accumulating and affecting the use of the printer. When dust in the printer enters the device, the dust is prone to explosion due to the presence of metal dust or other combustible particles. Adding a passivator through the passivation part 6 at the connection position can reduce the concentration of combustible dust, thereby reducing the risk of dust explosion and ensuring the safety of the equipment. The storage part 7 is used to store the passivator inside. The passivator uses a non-combustible powder similar to the combustible dust to reduce the concentration of dust. The dust-collecting pipe 9 can blow nitrogen or other protective gases into the interior of the storage part 7, and make the powder float inside the storage part 7 by blowing air onto the surface of the passivator. When the exhaust gas flows through the storage part 7, the exhaust gas inside the pipeline connected to the storage part 7 will flow at high speed, causing a negative pressure to form in the pipeline connected to the passivation part 6, and the gas carrying non-combustible powder will be sucked into the exhaust gas, thereby diluting the concentration of combustible dust and improving the safety of the equipment.

[0040] Furthermore, the passivation member 6 also includes: a stirring shaft 11 rotatably arranged in the storage space 8; a stirring blade 12 is arranged on the stirring shaft 11, and when the stirring shaft 11 rotates, the stirring blade 12 rotates synchronously; a driving member 13 is arranged on the stirring shaft 11, and the driving member 13 is used to drive the stirring shaft 11 to rotate.

[0041] In this embodiment, the passivation powder is non-combustible and has fine particles. When used for a long time, the powder may accumulate in the storage space 8 and cannot be blown up. The design of the stirring shaft 11 and the stirring blade 12 can ensure that the powder in the storage space 8 will not continue to accumulate, ensuring that the passivation member 6 can work normally and improving the safety of the equipment during operation. The driving member 13 is used to drive the stirring shaft 11 to rotate. The driving member 13 can be an electric motor, a motor or other device. Through the setting of the driving member 13, the stirring shaft 11 can be stably rotated, and then the passivation powder can be stably stirred by the stirring blade 12, ensuring the safety of the equipment.

[0042] Furthermore, it also includes: a cooling box 14 is arranged between the dust removal device 5 and the gas outlet 4, and the cooling box 14 is used to cool the gas.

[0043] In this embodiment, the cooling box 14 is used to cool the airflow as a whole. Since the airflow of the equipment is in a high-speed flow state, the temperature will continue to rise due to friction, which will lead to safety hazards. Therefore, the cooling box 14 is designed to cool the airflow as a whole to prevent the temperature of the protective gas from being too high and causing gas explosion, thereby improving the safety of the equipment and ensuring the circulation of the protective gas.

[0044] Furthermore, the dust removal device 5 is divided into multiple stages of dust removal.

[0045] In this embodiment, the dust removal device 5 is divided into multi-stage dust removal. After the protective gas passes through the printer, the dust inside is not only large in quantity but also has different particle sizes. When a screening device with a finer particle size is used for screening, although it can be screened at one time, the screen is blocked quickly due to the small particle size after screening, and the screen needs to be maintained frequently. Therefore, the dust removal device 5 is a multi-stage dust removal device, which filters the protective gas step by step. While ensuring the filtration quality, it can also effectively prevent blockage and ensure the continuity of the treatment.

[0046] Furthermore, the dust removal device 5 includes: a cyclone dust collector 15 arranged in the dust removal space 2, the cyclone dust collector 15 is arranged between the air inlet 3 and the passivation element 6, and the cyclone dust collector 15 is used to remove large particle impurities in the exhaust gas; a sintered mesh filter 16 is arranged between the passivation element 6 and the cooling box 14, and the sintered mesh filter 16 is used to further remove particulate impurities in the exhaust gas; a precision filter 20 is arranged between the sintered mesh filter 16 and the cooling box 14, and the precision filter 20 is used to completely remove impurities in the exhaust gas.

[0047] In this embodiment, the cyclone dust collector 15 is a first-stage filtering device, which can remove large impurities in the protective gas through high-speed flow and the centrifugal force of large impurities themselves, and will not be blocked. After the protective gas passes through the cyclone dust collector 15, only large impurities are removed, and it will also contain a large number of small impurities, so there is still a risk of explosion. After the gas passes through the passivation part 6, passivator powder will be added to it to prevent explosion and improve overall safety. After passing through the passivation part 6, the gas will pass through the sintered mesh filter 16 to further remove the passivator and small particles therein. After passing through the sintered mesh filter 16, the amount of dust in the protective gas is very small, not enough to cause a dust explosion accident, and at the same time, it also performs dust screening and filtration for subsequent filters to prevent blockage of the precision filter 20 and extend the service life of the precision filter 20.

[0048] Furthermore, it also includes: there are a plurality of ash hoppers 17, which are detachably arranged at the bottom of the cyclone dust collector 15 and the sintered mesh filter 16, and the ash hoppers 17 are used to receive the dust filtered by the filter.

[0049] In this embodiment, the ash hopper 17 is used to receive the dust filtered by the cyclone dust collector 15 and the sintered mesh dust collector, so that the dust can be collected and processed by the device after being filtered, ensuring the cleanliness and tidiness of the dust collector. The ash hopper 17 has a certain volume inside, which can accommodate a specified amount of dust, thereby ensuring the continuous working time after a single cleaning. The efficiency of dust removal is improved. The ash hopper 17 is detachable. When it is full of dust, it can be removed, cleaned, and then reinstalled, thereby ensuring that the ash hopper 17 can work continuously.

[0050] Furthermore, the alarm detector 18 is provided on the ash hopper 17 , and the alarm detector 18 is used to detect the amount of dust in the ash hopper 17 .

[0051] In this embodiment, the alarm detector 18 can detect the amount of dust in the ash hopper 17. If it is detected that the dust is full, an alarm will be issued to prevent the ash hopper 17 from being blocked due to failure to clean it in time, thereby ensuring the normal operation of the equipment and increasing the service life of the equipment.

[0052] Furthermore, it also includes: an exhaust gas filtering device 19 is arranged on the discharge port, and the exhaust gas filtering device 19 is used to filter the exhaust gas.

[0053] In this embodiment, if the ash hopper 17 is cleaned, oxygen will enter the entire device. At this time, the oxygen needs to be cleaned to ensure that there is no oxygen inside the device and improve the safety performance of the device. The exhaust gas filter device 19 is used to ensure that the gas discharged to the outside when removing oxygen does not contain particulate impurities, thereby ensuring the cleanliness of the external environment of the equipment.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A dust removal device for a 3D printer, characterized in that: include: A shell (1), wherein a dust removal space (2) is provided in the shell (1), and an air inlet (3) and an air outlet (4) are provided on the shell (1), and both the air inlet (3) and the air outlet (4) are connected to the dust removal space (2); A dust removal device (5) is arranged in the dust removal space (2), the air inlet (3) and the air outlet (4) are both connected to the dust removal device (5), and the dust removal device (5) is used to remove metal dust and residue in the exhaust gas dust; A passivation component (6) is arranged in the dust removal space (2), and the passivation component (6) is used to spray a passivating agent onto the gas containing dust. The passivation component (6) comprises: A material storage member (7) is arranged in the dust removal space (2), and a material storage space (8) is provided in the material storage member (7), and the material storage space (8) is used to store passivation powder; A dust-generating pipe (9) is arranged in the dust removal space (2). The dust-generating pipe (9) is arranged above the material storage space (8). The dust-generating pipe (9) has a plurality of air outlet pipes (10). The air outlet pipes (10) face the passivation powder in the material storage space (8).

2. A dust removal device for a 3D printer according to claim 1, characterized in that: The passivation element (6) further comprises: A stirring shaft (11) rotatably disposed in the material storage space (8); A stirring blade (12) is arranged on the stirring shaft (11); A driving member (13) is arranged on the stirring shaft (11), and the driving member (13) is used to drive the stirring shaft (11) to rotate.

3. A dust removal device for a 3D printer according to claim 1, characterized in that: Also includes: A cooling box (14) is arranged between the dust removal device (5) and the gas outlet (4), and the cooling box (14) is used to cool the gas.

4. A dust removal device for a 3D printer according to claim 1, characterized in that: The dust removal device (5) is divided into multiple stages of dust removal.

5. A dust removal device for a 3D printer according to claim 3, characterized in that: The dust removal device (5) comprises: A cyclone dust collector (15) is arranged in the dust removal space (2), the cyclone dust collector (15) is arranged between the air inlet (3) and the passivation element (6), and the cyclone dust collector (15) is used to remove large particle impurities in the exhaust gas; a sintered mesh filter (16), arranged between the passivation element (6) and the cooling box (14), the sintered mesh filter (16) being used to further remove particulate impurities in the exhaust gas; A precision filter (20) is arranged between the sintered mesh filter (16) and the cooling box (14), and the precision filter (20) is used to completely remove impurities in the exhaust gas.

6. A dust removal device for a 3D printer according to claim 5, characterized in that: Also includes: There are a plurality of ash hoppers (17), each of which is detachably arranged at the bottom of the cyclone dust collector (15) and the sintered mesh filter (16), and the ash hopper (17) is used to receive dust filtered by the filter.

7. A dust removal device for a 3D printer according to claim 6, characterized in that: Also includes: An alarm detector (18) is arranged on the ash hopper (17), and the alarm detector (18) is used to detect the amount of dust in the ash hopper (17).

8. A dust removal device for a 3D printer according to claim 1, characterized in that: Also includes: An exhaust gas filtering device (19) is arranged on the housing (1), and the exhaust gas filtering device (19) is used to filter exhaust gas.

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