CN218252903U

CN218252903U - Metal 3D prints flue gas filtration closed circulation system with cooling device

Info

Publication number: CN218252903U
Application number: CN202220756553.XU
Authority: CN
Inventors: 孙玉成; 张滨
Original assignee: Beijing Clean Air Technology Innovation Co Ltd
Current assignee: Beijing Clean Air Technology Innovation Co Ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2023-01-10
Anticipated expiration: 2032-04-01

Abstract

The application discloses metal 3D prints flue gas filtration closed circulation system with cooling device, the system is including inert gas source, metal 3D printer, filter, draught fan, fan case, cooling device that adopt the pipeline to be linked together, the system still includes instrumentation and controller, wherein, the inert gas source prints the protective media of in-process as metal 3D, the hot flue gas that metal 3D printed in-process production purifies the back through the filter, in the fan case is arranged into in the suction of draught fan, the rethread is arranged in the fan case and the cooling device at top cools off, the inert gas flow after the cooling can directly return metal 3D printer in-process recycle to guarantee the stability of metal 3D printing in-process thermal field, realize metal 3D printing process's stability and fail safe nature.

Description

Metal 3D prints flue gas filtration closed circulation system with cooling device

Technical Field

The utility model relates to a metal 3D prints technical field, concretely relates to metal 3D prints flue gas filtration closed circulation system with cooling device.

Background

The metal 3D printing is to sinter metal powder in a specific area by using high temperature of laser beams according to a design model by using the metal powder as a printing raw material, so that a product with a specific structure is manufactured. The whole printing and processing process needs to be carried out in a processing chamber filled with inert gas protection, so that the metal powder is prevented from reacting with active gas at high temperature and even exploding, and the safety of the processing process is ensured.

Because the in-process at the metal powder sintering can produce the dusty flue gas, also can produce extra heat in the operation processes such as sintering process and draught fan moreover, dusty inert gas need carry out filtration purification back circulation and use, and the produced extra heat of printing in-process can make the circulating gas temperature increase, needs cool off circulating gas to guarantee the stability in heat field, thereby guarantee the quality of product.

Usually, the cooling of flue gas can adopt air cooling or water-cooling mode, but the air cooling is inefficient, the pipeline is long, is difficult to satisfy metal 3D and prints the requirement, and the water-cooling has the risk of leaking, has increased the safe risk of printing the process.

Therefore, it is urgently needed to develop a cooling device which has high heat exchange efficiency, good safety and small volume and can fully cool the flue gas generated in the process of the metal 3D printer, and the stability of the gas temperature is ensured, so that the inert protective gas can be stably and safely recycled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a metal 3D prints flue gas filtration closed circulation system with cooling device, adopted the inert gas source to print as 3D and the protective medium among the filtering process, adopted the compressor refrigeration to carry out the heat exchange, it is efficient to have, the regulation nature is good, small, the characteristics that the security is good, the stability of metal powder 3D printing process thermal field has been guaranteed, guarantee stability, high efficiency and the security of metal 3D printing process, thereby guaranteed product quality and improved product efficiency.

The application provides a metal 3D prints flue gas filtration closed circulation system with cooling device, including inert gas source 1, metal 3D printer 2, filter 3, draught fan 4, fan box 5, the cooling device 6 that adopts the pipeline to be linked together, the system still includes instrumentation and controller 7.

In an implementation mode, a metal 3D printer air inlet 2A is formed in a metal 3D printer 2, a metal 3D printer air outlet 2B, an inert gas filling port 2C, an emptying valve 2D and an oxygen sensor 2E are formed in the metal 3D printer, a filter air inlet 3A and a filter air outlet 3B are formed in a filter 3, a draught fan air inlet 4A and a draught fan air outlet 4B are formed in a draught fan 4, a draught fan box air inlet 5A and a draught fan box air outlet 5B are formed in a draught fan box 5, wherein the metal 3D printer air outlet 2B is connected with the filter air inlet 3A through a pipeline, the filter air outlet 3B is connected with the draught fan box air inlet 5A through a pipeline, the draught fan box air inlet 5A is connected with the draught fan air inlet 4A through a pipeline, the draught fan air outlet 4B is arranged in a box body of the draught fan box 5, inert protective gas in the printing process is exhausted into the draught fan box 5 through the draught fan air outlet 4B, and then is exhausted through the draught fan box air outlet 5B of the draught fan box 5, the draught fan box air outlet 5B is connected with the metal 3D printer air inlet 2A pipeline, and accordingly an air circulation system is formed.

In an implementation manner, the cooling device 6 is composed of an evaporator 6A, a condenser 6B, a compressor 6C, a refrigerant pipeline 6D, an expansion valve 6F and a refrigerant tank 6E, the evaporator 6A is fixed at the lower part of the top cover 5C of the fan box, the condenser 6B, the compressor 6C, the refrigerant tank 6E and the expansion valve 6F are fixed at the upper part of the top cover 5C of the fan box, and the refrigerant pipeline 6D is respectively connected with the evaporator 6A, the condenser 6B, the compressor 6C, the refrigerant tank 6E and the expansion valve 6F.

In an implementation mode, the draught fan 4 is arranged in the fan box 5, an air inlet 4A of the draught fan is connected with an air outlet 3B of the filter 3, an air outlet 4B of the draught fan 4 is arranged in the box body of the fan box 5, inert protective gas in the printing process is exhausted into the fan box 5 through the air outlet 4B of the draught fan, and a micro-positive pressure atmosphere is formed in the fan box.

In an implementation mode, one end of a fan box air inlet 5A of the fan box 5 is connected with a filter air outlet 3B of the filter 3, the other end of the fan box air inlet is connected with a draught fan air inlet 4A of the draught fan 4, a fan box top cover 5C of the fan box 5 is used for fixing relevant parts of the cooling device 6, circulating air flow is discharged into the fan box through the draught fan air outlet 4B of the draught fan 4, the circulating air flow is guided by a guide plate 5E arranged in the fan box 5 and flows through an evaporator 6A of the cooling device 6 arranged in the fan box 5 according to a set route, and after heat exchange is carried out, cooled inert protective gas is sent into the metal 3D printer 2 again through the fan box air outlet 5B on the fan box top cover 5C of the fan box 5.

In a practical manner, a temperature sensor (5D) is also provided in the fan box 5 for measuring the temperature of the circulating gas in the fan box 5.

In a realizable manner, the cooling device 6 is used for cooling the circulating gas flow and controlling the gas flow temperature by controlling the opening degree of the expansion valve 6F by the controller 7 according to the set gas temperature. In an implementation manner, an inert gas source valve 1A is arranged on a pipeline between the inert gas source 1 and the metal 3D printer 2, inert gas is injected through a communication pipeline and the inert gas source valve 1A through an inert gas injection port 2C on the metal 3D printer 2, air in a circulating system is exhausted through an exhaust valve 2D, and oxygen content in the gas circulating system is monitored through an oxygen sensor 2E, so that the metal 3D printer 2 and the filter 3 are in the inert gas when the metal 3D printer 2 and the filter 3 are in normal operation.

The application provides a metal 3D prints flue gas filtration closed circulation system with cooling device utilizes interface pipeline to communicate inert gas source 1, metal 3D printer 2, filter 3, draught fan 4, fan box 5, cooling device 6 in proper order, each valve, each instrumentation and controller 7 etc.. The flue gas that metal 3D printed the in-process and produced at first purifies through the filter, and the gas after the purification is discharged into the fan case through the draught fan, through with cooling device's abundant heat transfer back, sends into metal 3D printer well recycle again, has guaranteed the stability that metal powder 3D printed the process thermal field, guarantees stability, high efficiency and the security of metal 3D printing process to product quality has been guaranteed and product efficiency has been improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of a metal 3D printing smoke filtering closed circulation system with a cooling device provided in an embodiment of the present application.

Description of the reference numerals

1-inert gas source, 1A-inert gas source valve, 2-metal 3D printer, 2A-metal 3D printer air inlet, 2B-metal 3D printer air outlet, 2C-inert gas filler, 2D-evacuation valve, 2E-oxygen sensor 3-filter, 3A-filter air inlet, 3B-filter air outlet, 4-induced draft fan, 4A-induced draft fan air inlet, 4B-induced draft fan air outlet, 5-blower box, 5A-blower box air inlet, 5B-blower box air outlet, 5C-blower box top cover, 5D-temperature sensor, 5E-guide plate, 6-cooling device, 6A-evaporator, 6B-condenser, 6C-compressor, 6D-refrigerant pipeline, 6E-refrigerant tank, 6F-expansion valve, 7-controller.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The structure and the working principle of the metal 3D printing smoke filtering closed circulation system with the cooling device are explained in detail through specific embodiments.

Fig. 1 is a schematic diagram illustrating a structure and an operating principle of a metal 3D printing smoke filtering closed circulation system with a cooling device according to a preferred embodiment. As shown in fig. 1, the metal 3D printing smoke filtering closed circulation system with the cooling device comprises an inert gas source 1, a metal 3D printer 2, a filter 3, an induced draft fan 4, a fan box 5 and a cooling device 6 which are communicated by adopting pipelines, and the system further comprises a detection instrument and a controller 7.

In the present embodiment, the inert gas source 1 is used for providing a shielding gas into the system; the metal 3D printer 2 is used for printing metal workpieces, and the filter 3 is used for filtering smoke dust in the tail gas of the protective gas; the induced draft fan 4 is used for providing power for the circulation of the protective gas; fan case 5 have isolated air, noise abatement etc. effect, cooling device 6 can reduce the heat that metal 3D printed process and fan operation in-process produced, guarantee the stability of protective gas temperature, temperature sensor 5D is used for monitoring the flue gas temperature, controller 7 is arranged in the operation of each equipment in the control system.

In an achievable mode, metal 3D printing smoke filtering closed circulation system with cooling device, metal 3D printer air intake 2A, metal 3D printer air outlet 2B, inert gas filler 2C, exhaust valve 2D and oxygen sensor 2E have been seted up on its metal 3D printer 2, filter air intake 3A and filter air outlet 3B have been seted up on filter 3, be equipped with draught fan air intake 4A and draught fan air outlet 4B on draught fan 4, fan case 5 has been seted up fan case air intake 5A and fan case air outlet 5B, wherein, metal 3D printer air outlet 2B links to each other with filter air intake 3A, filter air outlet 3B and draught fan air intake 4A, draught fan air intake 4A links to each other with fan case air intake 5A, fan case air outlet 5B links to each other with metal 3D printer air intake 2A, thereby make the air current form a bad system of circulation.

In an implementation manner, the metal 3D printing smoke filtering closed circulation system with the cooling device comprises the cooling device 6 which is composed of an evaporator 6A, a condenser 6B, a compressor 6C, a refrigerant pipeline 6D, an expansion valve 6F and a refrigerant tank 6E, wherein the evaporator 6A is fixed at the lower part of a top cover 5C of the fan box, the condenser 6B, the compressor 6C, the refrigerant tank 6E and the expansion valve 6F are fixed at the upper part of the top cover 5C of the fan box, and the refrigerant pipeline 6D is respectively connected with the evaporator 6A, the condenser 6B, the compressor 6C, the refrigerant tank 6E and the expansion valve 6F.

In an implementation mode, the metal 3D printed smoke filtering closed circulation system with the cooling device is characterized in that the induced draft fan 4 is arranged in the fan box 5, the air inlet 4A of the induced draft fan is connected with the air outlet 3B of the filter 3, the air outlet 4B of the induced draft fan 4 is arranged in the box body of the fan box 5, inert protective gas in the printing process is discharged into the fan box 5 through the air outlet 4B of the induced draft fan, a micro positive pressure atmosphere is formed in the fan box, and preferably, the induced draft fan adopts frequency conversion control to flexibly adjust air volume and air pressure.

In an implementation manner, the metal 3D printing smoke filtering closed circulation system with the cooling device has the advantages that one end of a fan box air inlet 5A of a fan box 5 is connected with a filter air outlet 3B of a filter 3, the other end of the fan box air inlet is connected with an induced draft fan air inlet 4A of an induced draft fan 4, a fan box top cover 5C of the fan box 5 is used for fixing relevant parts of the cooling device 6, circulating air flow is discharged into the fan box through the induced draft fan air outlet 4B of the induced draft fan 4, the circulating air flow is guided by a guide plate 5E arranged in the fan box 5, the circulating air flow flows through an evaporator 6A of the cooling device 6 arranged in the fan box 5 according to a set route, and after heat exchange, inert protective gas after cooling is sent into the metal 3D printer 2 again through the fan box air outlet 5B on the fan box top cover 5C of the fan box 5.

In an implementation mode, the metal 3D printing smoke filtering closed circulation system with the cooling device is characterized in that a fan box 5 of the closed circulation system is also provided with a temperature sensor 5D, and the temperature sensor can measure the temperature of circulating gas in the fan box 5

In an achievable mode, the metal 3D printing smoke filtering closed circulation system with the cooling device can cool the circulation gas flow and control the gas flow temperature according to the set gas temperature by the cooling device 6, preferably, the cooling device adopts frequency conversion control, and preferably, the coolant adopts R134a.

In an implementation manner, the metal 3D printing smoke filtering closed circulation system with the cooling device is characterized in that an inert gas source valve 1A is arranged on a pipeline between an inert gas source 1 and the metal 3D printer 2, inert gas is injected through a communicating pipeline and the inert gas source valve 1A through an inert gas filling port 2C on the metal 3D printer 2, air in the circulation system is discharged through an exhaust valve 2D, and oxygen content in the gas circulation system is monitored through an oxygen sensor 2E, so that when the metal 3D printer filtering device works normally, the metal 3D printer filtering device is in the inert gas.

The utility model relates to a metal 3D prints flue gas filtration closed circulation system's theory of operation with cooling device as follows:

before the metal 3D printing is started, firstly, an inert gas source 1 is opened to a filter, inert gas is injected into a metal 3D printer 2, the filter 3, an induced draft fan 4, a fan box 5 and a connecting pipeline thereof through a pipeline and an inert gas source valve 1A arranged on the pipeline to replace air in the inert gas source, the replaced air is discharged through an exhaust valve 2D, and the process of replacing the air in the device with the inert gas is called as gas washing. After the air washing process is finished, the metal 3D printer starts to work, the induced draft fan 4 is started firstly, the air volume of the system is adjusted to a set value, under the action of negative pressure, smoke dust generated in the printing process of the metal 3D printer enters the filter 3 through the air outlet 2B of the metal 3D printer and the air inlet 3A of the filter, purified air flow enters the induced draft fan through the air outlet 3B of the filter, the air inlet 5A of the fan box and the air inlet 4A of the induced draft fan, is discharged into the fan box through the air outlet 4B of the induced draft fan, is guided by the guide plate 5E arranged in the fan box 5, flows through the evaporator 6A of the cooling device 6 arranged in the fan box 5 according to a set route, and after heat exchange, the cooled inert protective gas is sent into the metal 3D printer 2 again through the air outlet 5B of the fan box top cover 5C of the fan box 5.

The present application has been described in detail with reference to particular embodiments and illustrative examples, but the description is not intended to be construed as limiting the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.

Claims

1. The utility model provides a metal 3D prints flue gas filtration closed circulation system with cooling device, its characterized in that, the system is including inert gas source (1), metal 3D printer (2), filter (3), draught fan (4), fan box (5), cooling device (6) that adopt the pipeline to be linked together, the system still includes detecting instrument and controller (7).

2. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 1, it is characterized in that a metal 3D printer (2) is provided with a metal 3D printer air inlet (2A), a metal 3D printer air outlet (2B), an inert gas filling port (2C), an exhaust valve (2D) and an oxygen sensor (2E), a filter (3) is provided with a filter air inlet (3A) and a filter air outlet (3B), an induced draft fan (4) is provided with an induced draft fan air inlet (4A) and an induced draft fan air outlet (4B), a fan box (5) is provided with a fan box air inlet (5A) and a fan box air outlet (5B), wherein, the air outlet (2B) of the metal 3D printer is connected with the air inlet (3A) of the filter through a pipeline, the air outlet (3B) of the filter is connected with the air inlet (5A) of the fan box through a pipeline, the air inlet (5A) of the fan box is connected with the air inlet (4A) of the induced draft fan through a pipeline, the air outlet (4B) of the induced draft fan is arranged in the box body of the fan box (5), the inert protective gas in the printing process is discharged into a fan box (5) through an air outlet (4B) of a draught fan, and then the air is discharged through a fan box air outlet (5B) of the fan box (5), and the fan box air outlet (5B) is connected with an air inlet (2A) of the metal 3D printer through a pipeline, so that the air flow forms a closed circulation system.

3. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 1, wherein the cooling device (6) is composed of an evaporator (6A), a condenser (6B), a compressor (6C), a refrigerant pipeline (6D), an expansion valve (6F) and a refrigerant tank (6E), the evaporator (6A) is fixed to the lower portion of a top cover (5C) of the fan box, the condenser (6B), the compressor (6C), the refrigerant tank (6E) and the expansion valve (6F) are fixed to the upper portion of the top cover (5C) of the fan box, and the refrigerant pipeline (6D) is respectively connected with the evaporator (6A), the condenser (6B), the compressor (6C), the refrigerant tank (6E) and the expansion valve (6F).

4. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 1, wherein an induced draft fan (4) is arranged in a fan box (5), an induced draft fan air inlet (4A) of the induced draft fan is connected with a filter air outlet (3B) of the filter (3), an induced draft fan air outlet (4B) of the induced draft fan (4) is arranged in a box body of the fan box (5), inert protective gas in the printing process is exhausted into the fan box (5) through the induced draft fan air outlet (4B), and a micro positive pressure atmosphere is formed in the fan box.

5. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 1, wherein one end of a fan box air inlet (5A) of the fan box (5) is connected with a filter air outlet (3B) of the filter (3), the other end of the fan box air inlet is connected with a draught fan air inlet (4A) of the draught fan (4), a fan box top cover (5C) of the fan box (5) is used for fixing relevant parts of the cooling device (6), circulating air flow is discharged into the fan box through the draught fan air outlet (4B) of the draught fan (4), the circulating air flow is guided through a guide plate (5E) arranged in the fan box (5), the circulating air flow flows through an evaporator (6A) of the cooling device (6) arranged in the fan box (5) according to a set route, after heat exchange is carried out, the cooled inert protective gas is fed into the metal 3D printer (2) again through the fan box air outlet (5B) on the fan box top cover (5C) of the fan box (5).

6. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 5, wherein a temperature sensor (5D) is further arranged in the fan box (5) and used for measuring the temperature of circulating gas in the fan box (5).

7. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 3, wherein the cooling device (6) is used for controlling the opening degree of the expansion valve (6F) through the controller (7) according to the set gas temperature, cooling the circulation gas flow and controlling the gas flow temperature.

8. The metal 3D printing smoke filtering closed circulation system with the cooling device according to claim 1, wherein an inert gas source valve (1A) is arranged on a pipeline between the inert gas source (1) and the metal 3D printer (2), inert gas is injected through an inert gas filling port (2C) in the metal 3D printer (2) through a communication pipeline and the inert gas source valve (1A), air in the circulation system is exhausted through an exhaust valve (2D), and oxygen content in the gas circulation system is monitored through an oxygen sensor (2E), so that the metal 3D printer (2) and the filter (3) are in the inert gas when the metal 3D printer (2) and the filter (3) work normally.