CN210100712U

CN210100712U - Oxygen content detection device for selective laser melting device

Info

Publication number: CN210100712U
Application number: CN201920606265.4U
Authority: CN
Inventors: 张成林; 王亮; 陈冲锋; 罗贤国; 宗进; 周兵兵; 陈卫林
Original assignee: Anhui Top Technology Co Ltd
Current assignee: Anhui Top Technology Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-02-21
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses an oxygen content detection device for a selective laser melting device, which comprises a working chamber, a gas filtering device, a gas circulating device and a gas detection sensor, wherein the filtering device comprises a filter element, a filtering air inlet pipe, a filtering air outlet pipe and a butterfly valve, the gas circulating device comprises a gas transfer box, a blower, a transverse air drum, a longitudinal air drum, a Y-shaped air exhaust chamber, a rectangular air drum chamber, an air inlet plate, a V-shaped air dispersing partition plate and a branch pipe, the transverse air drum and the longitudinal air drum are respectively provided with a front air hole and a rear air hole, the front air hole and the rear air hole are respectively communicated with the gas detection sensor through the branch pipe, the transverse air drum and the longitudinal air drum are communicated with the air outlet end of the blower and the rectangular air drum chamber, the Y-shaped air exhaust chamber is arranged outside an air inlet port, the Y-shaped air exhaust chamber is communicated with the filtering air inlet pipe, the utility model discloses can realize that gaseous real-time detection carries out on the gas detection sensor through the atmospheric pressure difference.

Description

Oxygen content detection device for selective laser melting device

Technical Field

The invention belongs to the technical field of selective laser melting forming, and particularly relates to oxygen content detection equipment for selective laser melting equipment.

Background

At present, 3D printers gradually appear in the field of vision of people, and a 3D printer with Selective Laser Melting (SLM) increasingly plays a non-negligible role as an important means for industrial processing. The technology takes solid powder as a raw material and directly converts a CAD model into an entity. According to factors such as material properties, part structures and process requirements, a layer of thin powder is uniformly paved on a working platform by a powder paving device of the SLM 3D printing equipment so as to melt the cross section of a layer of laser.

Among the prior art, the mist in the working chamber is directly taken out with the air pump, detect out behind the gaseous detection sensor that flows through behind the testing result of oxygen content, be arranged into the working chamber again, at this in-process, smoke and dust among the mist can enter into air pump and gaseous detection sensor, long-time use, the smoke and dust can seriously harm air pump and gaseous detection sensor, lead to often changing equipment, do not contain the smoke and dust in the mist that needs to treat to detect now, and equipment retrencies as far as possible, do not need often to change because of the equipment harm.

Disclosure of Invention

The invention provides oxygen content detection equipment for selective laser melting equipment, which can realize the self-flowing of gas by using the air pressure difference without providing kinetic energy by using an air pump, detect the filtered gas, protect a sensor from being damaged by smoke dust and prolong the service life of the gas sensor.

In order to achieve the purpose, the invention adopts the technical scheme that: an oxygen content detection device for a selective laser melting device comprises a working chamber, a gas filtering device, a gas circulating device and a gas detection sensor, wherein gas blowing ports and gas suction ports are arranged on two side walls of the working chamber, the filtering device comprises a filtering core, a filtering gas inlet pipe, a filtering gas outlet pipe and a butterfly valve, the filtering gas inlet pipe and the filtering gas outlet pipe are respectively connected to a gas inlet and a gas outlet of the filtering core through the butterfly valve, the gas circulating device comprises a gas transit box, a blower, a transverse gas blowing pipe, a longitudinal gas blowing pipe, a Y-shaped exhaust cavity, a rectangular gas blowing cavity, a gas inlet plate and a V-shaped gas dispersing partition plate, a front gas hole and a rear gas hole are respectively arranged on the transverse gas blowing pipe and the longitudinal gas blowing pipe, the gas detection sensor is fixedly arranged on the gas transit box, and the front gas hole and the rear gas hole are respectively communicated with, the air-conditioning device is characterized in that an air inlet hole and an air outlet hole are formed in the air transfer box, the air blower is arranged in the air transfer box, the V-shaped air dispersing partition plate is arranged in the rectangular air blowing cavity, the rectangular air blowing cavity is welded on the air inlet plate in a seamless mode, the transverse air blowing tube and the longitudinal air blowing tube are connected through a bent tube and a corrugated tube, the other end of the transverse air blowing tube penetrates through the air outlet hole and is connected with the air outlet end of the air blower, the other end of the longitudinal air blowing tube is communicated with the lower end face of the rectangular air blowing cavity, the air inlet plate is fixedly arranged on the outer side of the air blowing hole through screws, the Y-shaped air exhaust cavity is fixedly arranged on the outer side of the air suction port through screws, the Y-shaped air exhaust.

Preferably, an annular groove is formed in the inner wall of the air inlet plate, a sealing ring is arranged in the annular groove, and the sealing ring is located around the outer side of the air inlet.

Preferably, the air inlet plate and the V-shaped air diffusion partition plate are both provided with a plurality of air holes, the V-shaped air diffusion partition plate is arranged inside the rectangular air blowing cavity and below the air holes of the air inlet plate, and the V-shaped air diffusion partition plate is arranged above the pipe orifice of the air blowing pipe.

Preferably, the air inlet end of the blower is not connected with the filtering air outlet pipe, and the air in the filtering air outlet pipe enters the air transfer box and is sucked by the air inlet end of the blower.

The beneficial effect of adopting above technical scheme is: the invention relates to an oxygen content detection device for a selective laser melting device, in a closed working cavity, when a laser emitting device sinters and melts paved raw materials, a large amount of smoke dust is generated, a blower is started to blow mixed gas into a rectangular air-blowing cavity along an air-blowing pipe from an air outlet end, the mixed gas can be blown and dispersed by a V-shaped air-dispersing partition plate, the sharp point position of the V-shaped air-dispersing partition plate is farthest away from an air hole on an air inlet plate, two wings of the V-shaped air-dispersing partition plate are slowly close to the air hole on the air inlet plate, so that the mixed gas fed into the rectangular air-blowing cavity can be dispersed from the air hole of the V-shaped air-dispersing partition plate and then can uniformly enter the air hole of the air inlet plate to be uniformly blown out from the air-blowing port, the smoke dust in the working cavity is blown to an air suction port, simultaneously, the air inlet end of the blower generates suction force to enable the smoke dust in the working cavity to enter a filter core, the filter element filters smoke dust in the mixed gas, then the gas with the smoke dust filtered enters the gas transfer box from the gas inlet hole along the filtering gas outlet pipe, then the gas is sucked from the gas inlet end by the blower and blown out from the gas outlet end, the gas enters the rectangular air drum cavity along the transverse air drum pipe and the longitudinal air drum pipe, the flow rate of the gas is gradually reduced when the filtered gas flows through the transverse air drum pipe, the bent pipe, the corrugated pipe and the longitudinal air drum pipe and enters the rectangular air drum cavity, the gas flows through all pipe wall friction and the bend pipe reversing obstruction in the conveying process, the positive pressure difference is formed between the front air hole and the rear air hole, the filtered gas flows through the gas detection sensor from the front air hole through the branch pipe under the action of the pressure difference, the oxygen content in the gas is detected, and finally the gas enters the rear air hole, the gas detected by the invention is clean gas with the smoke dust filtered by the filter element, the gas detection sensor is not damaged too much, the service life of the gas detection sensor is prolonged, the gas in the bronchus utilizes the pressure difference between the front gas hole and the rear gas hole to automatically push gas to be transmitted, the gas pump is not needed to be used for providing power, the detection program is simplified, the gas pump and the gas detection sensor are not needed to be frequently replaced like the prior art, the detection efficiency is improved, and the normal operation of the whole equipment after the gas detection sensor is out of alignment can not occur.

Drawings

FIG. 1 is a schematic view of the left front view of the present invention;

FIG. 2 is a schematic diagram of the right rear view of the present invention;

FIG. 3 is a schematic view of a portion of the structure of the present invention;

FIG. 4 is a schematic view showing the internal structure of the air blowing device of the present invention;

FIG. 5 is a schematic view of the structure of the air blowing device of the present invention.

The air purifier comprises a working cavity 1, a gas detection sensor 2, an air blowing port 3, an air suction port 4, a filter core 5, a filter air inlet pipe 6, a filter air outlet pipe 7, a butterfly valve 8, a gas transfer box 9, a blower 10, a transverse air blowing pipe 11, a longitudinal air blowing pipe 12, a Y-shaped air exhaust cavity 13, a rectangular air blowing cavity 14, an air inlet plate 15, a V-shaped air dispersing partition plate 16, a front air outlet 17, a rear air outlet 18, a branch air pipe 19, an air inlet 20, an air outlet 21, an elbow 22, a corrugated pipe 23, a ring-shaped groove 24, a sealing ring 25 and an air outlet 26.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 to 5, the present invention is an oxygen content detecting apparatus for a selective laser melting apparatus, comprising a working chamber 1, a gas filtering device, a gas circulating device and a gas detecting sensor 2, wherein both side walls of the working chamber 1 are provided with an air blowing port 3 and an air suction port 4, the filtering device comprises a filter core 5, a filtering air inlet pipe 6, a filtering air outlet pipe 7 and a butterfly valve 8, the filtering air inlet pipe 6 and the filtering air outlet pipe 7 are respectively connected to an air inlet and an air outlet of the filter core 5 through the butterfly valve 8, the gas circulating device comprises a gas transit box 9, a blower 10, a transverse air blowing pipe 11, a longitudinal air blowing pipe 12, a Y-shaped exhaust cavity 13, a rectangular air blowing cavity 14, an air inlet plate 15 and a V-shaped air dispersing partition plate 16, the transverse air blowing pipe 11 and the longitudinal air blowing pipe 12 are respectively provided with a front air vent 17 and a rear air vent 18, the gas detecting sensor 2 is, the front air vent 17 and the rear air vent 18 are respectively communicated with the gas detection sensor 2 through a branch air pipe 19, the gas transit box 9 is provided with an air inlet hole 20 and an air outlet hole 21, the blower 10 is arranged in the gas transit box 9, the V-shaped air dispersing partition 16 is arranged in the rectangular air blowing cavity 14, the rectangular air blowing cavity 14 is welded on the air inlet plate 15 in a seamless manner, the transverse air blowing pipe 11 and the longitudinal air blowing pipe 12 are connected through a bent pipe 22 and a corrugated pipe 23, the other end of the transverse air blowing pipe 11 penetrates through the air outlet hole 21 to be connected with the air outlet end of the blower 10, the other end of the longitudinal air blowing pipe 12 is communicated with the lower end face of the rectangular air blowing cavity 14, the air inlet plate 15 is fixedly arranged on the outer side of the air blowing port 3 through screws, the Y-shaped air outlet cavity 13 is fixedly arranged on the outer side of the air suction port 4 through screws, and, the filtering air outlet pipe 7 is communicated with an air inlet hole 20 of the gas transit box 9.

In this embodiment, an annular groove 24 is formed in the inner wall of the air inlet plate 15, a sealing ring 25 is arranged in the annular groove 24, and the sealing ring 25 is located around the outer side of the air inlet.

In this embodiment, the air inlet plate 15 and the V-shaped air diffusion partition plate 16 are both provided with a plurality of air holes 26, the V-shaped air diffusion partition plate 16 is disposed inside the rectangular air blowing cavity 14 and below the air holes 26 of the air inlet plate 15, and the V-shaped air diffusion partition plate 16 is located above the orifice of the air blowing pipe.

In this embodiment, the air inlet end of the blower 10 is not connected to the filtered air pipe 7, and the air filtered from the filtered air pipe 7 enters the air transfer box 9 and is then sucked by the air inlet end of the blower 10.

A method for detecting oxygen content of selective laser melting equipment comprises the following steps:

step one, collecting gas and smoke dust: starting the blower 10 and the gas detection sensor 2, generating suction at the air inlet end of the blower 10, and enabling mixed gas formed by mixing gas and smoke dust in the working cavity 1 to enter a Y-shaped exhaust cavity 13 from an air suction port 4;

step two, filtering mixed gas: the mixed gas sucked into the Y-shaped exhaust cavity 13 enters the filter element through the filtering air inlet pipe 6, the smoke dust in the mixed gas is filtered, and the clean gas enters the gas transfer box 9 through the air inlet hole 20 along the filtering air outlet pipe 7 and is sucked by the air inlet end of the blower 10;

step three, air blowing: the blower 10 blows out the sucked gas from the gas outlet end, the gas enters the rectangular air blowing cavity 14 along the transverse air blowing pipe 11, the bent pipe 22, the corrugated pipe 23 and the longitudinal air blowing pipe 12, is uniformly scattered by the V-shaped air scattering partition plate 16, enters the working cavity 1 from the air holes 26 of the air inlet plate 15 in equal quantity and equal speed, brings new clean gas into the working cavity 1, and blows the newly generated mixed gas to the direction of the air suction port 4;

fourthly, detecting the oxygen content in the gas: in the process that the filtered gas flows through the transverse gas blowing pipe 11, the bent pipe 22, the corrugated pipe 23 and the longitudinal gas blowing pipe 12 and enters the rectangular gas blowing cavity 14, the gas is subjected to friction of all pipe walls and reversing obstruction of the bent pipe 22 in the conveying process, the flow rate of the gas can be slowly reduced, a positive pressure difference is formed between the front gas hole 17 and the rear gas hole 18, the filtered gas flows through the gas detection sensor 2 from the front gas hole 17 through the gas branch pipe 19 under the action of the pressure difference, the oxygen content in the gas is detected, and finally the filtered gas enters the rear gas hole 18.

In this embodiment, in the fourth step, the air pressure at the front air vent is 2.32Kpa, the air pressure at the rear air vent is 1.98Kpa, the pressure at the air vent is 2.45Kpa, the pressure at the end of the longitudinal air blowing tube is 2.15Kpa, the pressure difference between the front air vent and the rear air vent is 0.34Kpa, the pressure difference between the air vent and the end of the longitudinal air blowing tube is 0.3Kpa, the air at the air vent can smoothly enter the front air vent, meanwhile, the air in the branch air tube can smoothly enter the end of the longitudinal air blowing tube from the rear air vent, and the whole air flow smoothly circulates in the system under the action of the pressure difference.

Based on the above, in the oxygen content detection device for the selective laser melting device, in the closed working chamber 1, when the laser emitting device sinters and melts the paved raw material, a large amount of smoke dust is generated, the blower 10 is started, the mixed gas is blown into the rectangular air-blowing chamber 14 from the air outlet end along the air blowing pipe, the mixed gas is blown and dispersed by the V-shaped air-dispersing partition plate 16, the point position of the V-shaped air-dispersing partition plate 16 is farthest away from the air hole 26 on the air inlet plate 15, the two wings of the V-shaped air-dispersing partition plate 16 are gradually close to the air hole 26 on the air inlet plate 15, so that the mixed gas sent into the rectangular air-blowing chamber 14 is dispersed from the air hole 26 of the V-shaped air-dispersing partition plate 16, and then can uniformly enter the air hole 26 of the air inlet plate 15, and is uniformly blown out from the air blowing port 3, the smoke dust in the working chamber 1 is blown to the air inlet 4, and meanwhile, the air inlet end of, the smoke dust in the working cavity 1 enters the filter core 5 from the air suction port 4 along the Y-shaped exhaust cavity 13 and the filtering air inlet pipe 6, the filter core 5 filters the smoke dust in the mixed gas, then the gas with the filtered smoke dust enters the gas transfer box 9 from the air inlet hole 20 along the filtering air pipe 7, then the gas is sucked by the air blower 10 from the air inlet end and is blown out from the air outlet end, the gas enters the rectangular air drum cavity 14 along the transverse air blowing pipe 11 and the longitudinal air blowing pipe 12, the filtered gas flows through the transverse air blowing pipe 11, the bent pipe 22, the corrugated pipe 23 and the longitudinal air blowing pipe 12 and enters the rectangular air drum cavity 14, the flow rate of the gas is slowly reduced through the friction of all pipe walls and the obstruction of the reversing of the bent pipe 22 in the conveying process, a positive pressure difference is formed between the front air hole 17 and the rear air hole 18, and the filtered gas is under the action of the pressure difference, the gas detected by the invention is clean gas with smoke and dust filtered by the filter element 5, the gas detection sensor 2 is not damaged too much, the service life of the gas detection sensor is prolonged, the gas in the branch pipe 19 is automatically pushed to be transmitted by utilizing the pressure difference between the front gas hole 17 and the rear gas hole 18, a gas pump is not needed to be used for providing power, the detection procedure is simplified, the gas pump and the gas detection sensor 2 do not need to be frequently replaced like the prior art, the detection efficiency is improved, and the normal operation of the whole equipment can not occur after the gas detection sensor 2 is out of alignment.

The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the invention based on the principles and technical solutions of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. The utility model provides an oxygen content check out test set for election district laser melting equipment, includes working chamber, gaseous filter equipment, gas circulation device and gaseous sensor that detects, be equipped with drum gas mouth and induction port on the both sides wall of working chamber, filter equipment is including crossing the filter core, filtering the intake pipe, filtering outlet duct and butterfly valve, it connects on the air inlet and the gas outlet of filter core, its characterized in that with filtering the outlet duct through the butterfly valve respectively to filter the intake pipe: the gas circulating device comprises a gas transfer box, a blower, a transverse air blowing pipe, a longitudinal air blowing pipe, a Y-shaped exhaust cavity, a rectangular air blowing cavity, an air inlet plate, a V-shaped gas dispersing partition plate and a branch air pipe, wherein the transverse air blowing pipe and the longitudinal air blowing pipe are respectively provided with a front air hole and a rear air hole, a gas detection sensor is fixedly arranged on the gas transfer box, the front air hole and the rear air hole are respectively communicated with the gas detection sensor through the branch air pipe, the gas transfer box is provided with the air inlet hole and the air outlet hole, the blower is arranged in the gas transfer box, the V-shaped gas dispersing partition plate is arranged in the rectangular air blowing cavity, the rectangular air blowing cavity is welded on the air inlet plate in a seamless manner, the transverse air blowing pipe and the longitudinal air blowing pipe are connected through a bent pipe and a corrugated pipe, and the other end of the transverse air blowing pipe penetrates through, the other end of the longitudinal air blowing pipe is communicated with the lower end face of the rectangular air blowing cavity, the air inlet plate is fixedly arranged on the outer side of an air blowing opening through screws, the Y-shaped exhaust cavity is fixedly arranged on the outer side of an air suction opening through screws, the Y-shaped exhaust cavity is communicated with the filtering air inlet pipe, and the filtering air outlet pipe is communicated with an air inlet hole of the air transit box.

2. The oxygen content detection apparatus for a selective laser melting apparatus according to claim 1, wherein: the air inlet plate is characterized in that an annular groove is formed in the inner wall of the air inlet plate, a sealing ring is arranged in the annular groove, and the sealing ring is located around the outer side of the air inlet.

3. The oxygen content detection apparatus for a selective laser melting apparatus according to claim 1, wherein: the air inlet plate and the V-shaped air dispersing partition plate are both provided with a plurality of air holes, the V-shaped air dispersing partition plate is arranged inside the rectangular air blowing cavity and below the air holes of the air inlet plate, and the V-shaped air dispersing partition plate is positioned above the pipe orifice of the air blowing pipe.

4. The oxygen content detection apparatus for a selective laser melting apparatus according to claim 1, wherein: the air inlet end of the blower is not connected with the filtering air outlet pipe, and the air of the filtering air outlet pipe enters the air transfer box and is sucked by the air inlet end of the blower.