Circulating filtering device of 3D printing equipment

Abstract

The utility model discloses a circulating filtering device of 3D printing equipment, relates to the technical field of 3D printing, and aims to solve the problem of poor circulating filtering efficiency in the existing 3D printing process. The circulating filtering device of the 3D printing equipment comprises a support, a filtering structure and a power source, the filtering structure is arranged on the support, the filtering structure comprises a first-stage filtering cabinet and a second-stage filtering cabinet which are communicated, the filtering structure is used for smoke dust in gas, and the power source is connected with the filtering structure through a conveying pipeline. An air outlet of the power source is connected with the primary filter cabinet, and an air inlet of the power source is connected with the secondary filter cabinet to form circulating filtration. The circulating filtering device of the 3D printing equipment is used for improving the gas circulating filtering efficiency.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a circulating filtration device for 3D printing equipment. Background Technology

[0002] The metal 3D printing process generates a large amount of dust. If this dust is not treated promptly, it will not only affect print quality but may also damage the equipment. For small or medium-sized metal 3D printing equipment, the circulating filtration system typically uses four cylindrical filter elements without a backflush air manifold. As printing time increases, a large amount of dust accumulates on the filter elements, causing the filter element pressure differential to rise. Eventually, the equipment cannot continue printing, requiring frequent replacement of new filter elements. This not only increases costs but also affects production efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a circulating filtration device for 3D printing equipment to improve the efficiency of circulating filtration.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A circulating filter device for 3D printing equipment, comprising:

[0006] support;

[0007] A filtration structure is mounted on the support, the filtration structure comprising a primary filtration cabinet and a secondary filtration cabinet connected together, the filtration structure being used for dust in the gas;

[0008] The power source is connected to the filter structure via a delivery pipe. The air outlet of the power source is connected to the primary filter cabinet, and the air inlet of the power source is connected to the secondary filter cabinet, forming a circulating filtration system.

[0009] Optionally, the primary filter cabinet includes multiple primary filter elements, which are used to filter larger particles of smoke and dust in the gas.

[0010] Optionally, the number of primary filter elements is set to eight, and the eight primary filter elements are arranged in an array in the support.

[0011] Optionally, the primary filter cabinet further includes a backflush air manifold and a differential pressure sensor. The differential pressure sensor is located at both ends of the primary filter element to monitor the pressure difference of the primary filter element. The backflush air manifold is positioned towards the center of the primary filter element to blow away the smoke and dust accumulated on the primary filter element.

[0012] Optionally, the 3D printing equipment's circulating filtration device further includes an overflow bucket located at the bottom of the primary filter cabinet, the overflow bucket being used to collect the smoke and dust blown off from the primary filter cabinet.

[0013] Optionally, the secondary filter cabinet includes a T-shaped tee pipe and two secondary filter elements. The T-shaped tee pipe is used to connect the outlets of the two secondary filter elements and lead to the air inlet of the power source.

[0014] Optionally, the conveying pipeline is also connected to an anemometer and a control valve. The anemometer is used to detect the flow rate of the gas in the conveying pipeline, and the control valve is used to control the flow of the gas in the conveying pipeline.

[0015] Compared with existing technologies, the circulating filtration device for 3D printing equipment provided by this invention significantly increases the filtration area and enhances the filtration capacity for smoke and dust by increasing the number and size of the primary filter elements. This allows it to better adapt to the large amounts of smoke and dust generated by large metal 3D printing equipment. Furthermore, the back-blowing air manifold at the top of the primary filter cabinet can promptly activate back-blowing when the filter element pressure differential is too high, effectively cleaning the filter element, reducing the pressure differential, greatly extending the filter element's lifespan, reducing the frequency of filter element replacement, lowering production costs, and improving production efficiency. The two sets of secondary filter cabinets further improve filtration accuracy, ensuring the cleanliness of the gas circulating into the fan inlet, contributing to the continuous and stable operation of the equipment and improving printing quality. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of the circulating filter device for 3D printing equipment provided in an embodiment of the present invention.

[0018] Figure 2 This is a structural schematic diagram of the circulating filter device for 3D printing equipment provided in an embodiment of the present invention, showing some of the components.

[0019] Figure 3 This is a structural schematic diagram of the circulating filter device for 3D printing equipment provided in an embodiment of the present invention, showing some of the components.

[0020] Figure 4 This is a top view of the circulating filtration device for a 3D printing equipment provided in an embodiment of the present invention, showing the primary filter element.

[0021] Figure label:

[0022] 100-3D printing equipment circulating filtration system; 1-stand; 2-primary filter cabinet; 21-primary filter element; 22-backflush air manifold; 23-differential pressure sensor; 3-secondary filter cabinet; 31-secondary filter element; 32-T-type tee pipe; 4-power source; 5-overflow bucket; 6-pneumatic butterfly valve; 7-manual butterfly valve. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Please see Figures 1-4The 3D printing equipment circulating filtration device 100 provided in this embodiment of the utility model includes a support 1, a filtration structure and a power source 4. The filtration structure is mounted on the support 1 and includes a primary filtration cabinet 2 and a secondary filtration cabinet 3 connected to each other. The filtration structure is used to filter dust in the gas. The power source 4 is connected to the filtration structure through a conveying pipe. The air outlet of the power source 4 is connected to the primary filtration cabinet 2 and the air inlet of the power source 4 is connected to the secondary filtration cabinet 3, forming a circulating filtration.

[0029] In this application, the power source 4 includes a fan. As the power source 4 for the entire circulating filtration system, the fan's main function is to provide the power for gas flow. After the fan starts, the airflow generated at the outlet drives the internal inert gas along the pipe into the forming chamber, causing the inert gas to circulate in the system, thereby carrying away the dust generated during the printing process.

[0030] It should be noted that the delivery pipeline consists of multiple straight pipes and bends, which together form the gas delivery pipeline system. Straight pipes are used to connect the various components in a straight line, while bends are used to change the direction of gas flow, allowing the pipeline to be laid out reasonably according to the equipment layout and space requirements. During installation, it is essential to ensure that the connections between straight and bend pipes are secure and that the inner walls of the pipes are smooth to reduce resistance to gas flow.

[0031] Furthermore, the conveying pipeline also includes copper wire hoses and corrugated pipes, which serve as flexible connections in the pipeline. Copper wire hoses and corrugated pipes possess a certain degree of flexibility and bendability, enabling them to adapt to equipment vibrations and slight displacements, preventing pipeline damage caused by rigid connections, and ensuring the reliability and stability of the system.

[0032] Please see Figure 3 and Figure 4 In this application, the primary filter cabinet 2 includes multiple primary filter elements 21, which are used to filter larger particles of smoke and dust in the gas.

[0033] Furthermore, the number of primary filter elements 21 is set to eight, and the eight primary filter elements 21 are arranged in an array in the bracket 1.

[0034] In one embodiment provided in this application, the primary filter cabinet 2 further includes a backflush air manifold 22 and a differential pressure sensor 23. The differential pressure sensor 23 is disposed at both ends of the primary filter element 21 and is used to monitor the pressure difference of the primary filter element 21. The backflush air manifold 22 is disposed facing the center of the primary filter element 21 and is used to blow off the smoke and dust accumulated on the primary filter element 21.

[0035] Furthermore, the 3D printing equipment circulating filtration device 100 also includes an overflow bucket 5 located at the bottom of the primary filter cabinet 2, which is used to collect the dust blown off from the primary filter cabinet 2.

[0036] Please see Figure 1 and Figure 2 It should be noted that in this application, four backflush air manifolds 22 are used, all of which are installed on the top of the primary filter cabinet 2. Each backflush air manifold 22 has two release ports, and each release port is aligned with the center of each primary filter element 21. When the differential pressure sensor 23 detects that the differential pressure of the primary filter element 21 is too high, the control system will activate the backflush air manifolds 22. The backflush air manifolds 22 release high-pressure gas, which is blown out from the center of the primary filter element 21, blowing the dust accumulated on the surface of the primary filter element 21 into the overflow tank 5, thereby reducing the differential pressure of the primary filter element 21 and restoring the filtration performance of the primary filter element 21.

[0037] In this application, the secondary filter cabinet 3 includes a T-shaped tee pipe 32 and two secondary filter elements 31. The T-shaped tee pipe 32 is used to connect the outlets of the two secondary filter elements 31 and leads to the air inlet of the power source 4. The secondary filter elements 31 can remove the remaining fine particles in the smoke and dust, improve the cleanliness of the gas, and ensure the quality of the gas that finally circulates into the air inlet of the fan.

[0038] In addition, the delivery pipeline is also connected to an anemometer and a control valve. The anemometer is used to detect the flow rate of gas in the delivery pipeline, and the control valve is used to control the flow of gas in the delivery pipeline.

[0039] The control valves include a pneumatic butterfly valve 6 and a manual butterfly valve 7. The pneumatic butterfly valve 6 is used to control the flow rate and on / off state of the gas. Through pneumatic control, the gas flow rate can be precisely adjusted according to actual needs to ensure stable gas flow within the system. During equipment operation, operators can adjust the opening of the pneumatic butterfly valve 6 through the control system based on the gas flow rate data fed back by the anemometer, thereby achieving precise control of the gas flow rate. The manual butterfly valve 7, as a manually controlled valve, is installed on the pipeline and is mainly used for manually controlling the on / off state and flow rate of the gas during equipment commissioning, maintenance, or emergencies. Under normal operation, the manual butterfly valve 7 is generally in the normally open state, but when special operations are required, operators can adjust the opening of the manual butterfly valve 7 to meet different needs.

[0040] In practice: The metal 3D printing equipment and the 3D printing equipment circulation filtration device 100 are turned on. The fan starts running, and the airflow generated at its outlet blows the internal inert gas into the forming chamber along a pipeline composed of straight and curved pipes. At this time, the pneumatic butterfly valve 6 and the manual butterfly valve 7 are at their preset openings to ensure normal gas flow. The differential pressure sensor 23 and the anemometer start working, monitoring the pressure difference and gas flow rate within the system in real time and transmitting the data to the control system. Inside the forming chamber, as the metal 3D printing process proceeds, a large amount of smoke and dust is generated. This smoke and dust mix with the inert gas and enters the pipeline through the return air inlet, beginning the circulation filtration process. The gas containing smoke and dust first enters the primary filter cabinet 2. Inside the primary filter cabinet 2, eight primary filter elements 21 perform preliminary filtration of the gas. Most of the larger smoke and dust particles are intercepted on the surface of the primary filter elements 21, resulting in preliminary purification of the gas. After primary filtration, the gas enters two sets of secondary filter cabinets 3 through pipelines. Inside the secondary filter cabinet 3, two sets of secondary filter elements 31 further filter the gas, removing the remaining fine particulate matter and making the gas cleaner. The clean gas after two stages of filtration converges through the T-shaped three-way pipe 32 and finally enters the fan inlet to complete one cycle of filtration.

[0041] Throughout the cycle, the anemometer continuously monitors the gas flow rate. Based on the monitoring data, operators adjust the gas flow rate in real time via the pneumatic butterfly valve 6 to ensure stable system operation. During continuous operation, a large amount of dust gradually accumulates on the surface of the primary filter element 21, causing the pressure difference across the filter element to increase continuously. When the differential pressure sensor 23 detects that the pressure difference of the primary filter element 21 exceeds the set threshold, the control system automatically triggers the backflushing air manifold 22 to start. The backflushing air manifold 22 releases high-pressure gas, which is blown out from the center of the primary filter element 21 through the release port. The powerful airflow blows the dust accumulated on the filter element surface into the overflow tank 5. The backflushing process continues for a period of time to ensure that the dust on the filter element surface is thoroughly cleaned. After the backflushing is completed, the pressure difference of the primary filter element 21 decreases, restoring good filtration performance, and the system continues to operate normally. Operators need to regularly check the dust accumulation in the overflow tank 5 and clean the overflow tank 5 promptly to ensure the backflushing effect and the normal operation of the equipment.

[0042] As can be seen from the structure and specific implementation process of the circulating filtration device 100 of the 3D printing equipment, this utility model significantly improves the filtration area and enhances the filtration capacity for smoke and dust by increasing the number of primary filter elements 21 and increasing the size of the filter elements, which can better adapt to the large amount of smoke and dust generated by large metal 3D printing equipment. In addition, the back-blowing air bag 22 equipped on the top of the primary filter cabinet 2 can start back-blowing in time when the filter element pressure difference is too high, effectively cleaning the filter element, reducing the pressure difference, greatly extending the service life of the filter element, reducing the number of times the filter element needs to be replaced, reducing production costs, and improving production efficiency. The setting of two sets of secondary filter cabinets 3 further improves the filtration accuracy, ensures the cleanliness of the gas circulating into the air inlet of the fan, helps the equipment to operate continuously and stably, and improves the printing quality.

[0043] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A circulating filtration device for 3D printing equipment, characterized in that, include: support; A filtration structure is mounted on the support, the filtration structure comprising a primary filtration cabinet and a secondary filtration cabinet connected together, the filtration structure being used for dust in the gas; The power source is connected to the filter structure via a delivery pipe. The air outlet of the power source is connected to the primary filter cabinet, and the air inlet of the power source is connected to the secondary filter cabinet, forming a circulating filtration system.

2. The 3D printing equipment circulating filtration device according to claim 1, characterized in that, The primary filter cabinet includes multiple primary filter elements, which are used to filter larger particles of smoke and dust in the gas.

3. The 3D printing equipment circulating filtration device according to claim 2, characterized in that, The number of primary filter elements is set to eight, and the eight primary filter elements are arranged in an array in the bracket.

4. The 3D printing equipment circulating filtration device according to claim 2, characterized in that, The primary filter cabinet also includes a backflush air manifold and a differential pressure sensor. The differential pressure sensor is located at both ends of the primary filter element to monitor the pressure difference of the primary filter element. The backflush air manifold is positioned towards the center of the primary filter element to blow away the smoke and dust accumulated on the primary filter element.

5. The 3D printing equipment circulating filtration device according to claim 4, characterized in that, The 3D printing equipment's circulating filtration device also includes an overflow bucket located at the bottom of the primary filter cabinet, which is used to collect the dust blown off from the primary filter cabinet.

6. The 3D printing equipment circulating filtration device according to claim 1, characterized in that, The secondary filter cabinet includes a T-shaped three-way pipe and two secondary filter elements. The T-shaped three-way pipe is used to connect the outlets of the two secondary filter elements and lead to the air inlet of the power source.

7. The 3D printing equipment circulating filtration device according to claim 1, characterized in that, The conveying pipeline is also connected to an anemometer and a control valve. The anemometer is used to detect the flow rate of gas in the conveying pipeline, and the control valve is used to control the flow of gas in the conveying pipeline.

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